Патент USA US2129202код для вставки
Sept. 6,1938. ' M. K. DREWRY ‘ AIR CONDITIONING 2,129,202 SYSTEM ‘ Filed Sept. 18, 19:53 w . N \\\\\ \ \ \\\\ \\ \\\\\ \\\ \\ \\\\\\\\ a \\ \ \\\\\\ \ \ .zzw wmmlamw 2,129,202 Patented Sept. 6, 1938 UNITED STATES PATENT OFFICE 2,129,202 AIR CONDITIONING SYSTEM Montrose K. Drewry, Milwaukee, Wis. Application September 18, 1933, Serial No. 689,935 15 Claims. (Cl. 257—3) This invention relates in general to air con ditioning systems and particularly to apparatus for conditioning air and circulating it through enclosed spaces. ' . An object of the invention is to provide a simple and e?ieient airv conditioning apparatus for regulating the temperature and humidity conditions of the air in a building. Another object of the invention is to provide 10 an air conditioning'system that is arranged to operate e?iciently and with minimum attention. Another object of the invention is to provide an air conditioning system having means for automatically regulating the rate of combustion v‘of fuel and the rate of circulation of air in ac cordance with conditions in the space being served with conditioned air; ‘ A further object of the invention is to provide of rectangular shape associated with a heating furnace or boiler 2. The air conditioning ap paratus is preferably located in the basement of the building to be served and the conditioning chamber I may be supported conveniently from 5 the basement ceiling, as shown. Air to be con ditioned is drawn from the rooms of the build ing being served into one or more intake regis ters 3 and through associated intake pipes or 10 ducts! into the conditioning chamber I. A partition 75, disposed in a vertical medial plane of the chamber 1 and extending from the top downward to near the bottom thereof, di vides the chamber into an intake compartment 6, to the top of‘ which the intake pipes 4 are connected, and a discharge compartment ‘I. The partition 5 constrains the ?ow of the incom ing air and directs it downward through a ?lter 8 arranged horizontally in the intake compart ment 6 in position to remove dust and other‘ 20 system in which, while the system is used‘ for cooling purposes, the boiler is operated to heat foreign particles from the air. From the ?lter, storage water and is at all times prepared to ' the air ?ows downward to the bottom of the a new method of operating a heat exchange compartment 5 and thence horizontally through take on‘ a heating load. According to the present invention, air con 25 ditioning apparatus having an air circulating system is provided with an air cleaner, a humidi ?er and a heat exchanger adapted to heat orv cool the air as conditions may require. For a connecting passageway beneath the lower end of the partition 5 into the compartment 1. At‘the bottom of the compartment 1, there is arranged a humidifying tank or pan 9 that presents a surface of warm water to the in heating the air, a boiler provided with an auto matic fuel feeding hopper is connected to the fiowing ?ltered air from which the air absorbs in the boiler and the rate of circulation of air in the circulating system in accordance with heat or cool the air, according to the require ments of weather conditions, as it ?ows upward in the compartment 1. From the top of the com a predetermined amount of moisture. , 30 Above the humidi?er 9, there is arranged a heat exchanger, and automatic means are pro vided for regulating the rate of combustion of fuel I heat exchanging radiator ID that functions to 35 temperature conditions in the space‘being heated. Flue gases are drawn through the fuel in the partment ‘I, the air ?ows into outlet pipes ll hopper to condition it for feeding by gravity and to improve its qualities for combustion. In warm weather, cold water is circulated through through which it is delivered to one or more discharge registers It.‘ in the rooms of the build ing being served, the air circulating system func the boiler may be utilized for heating service furnace. tioning, in general, in much the same manner 40 40 the heat exchanger to cool the air and to con dense excess moisture out of it. coincidentally, - as the circulating system of‘ the usual warm air water. , The foregoing and other objects of the inven .' tion may be achieved by the air conditioning system described by way of example in the fol lowing part of ‘this speci?cation in conjunction with the accompanying drawing, in which the single ?gure is a view, partly in side elevation and partly in vertical section, of apparatus em bodying the invention installed in the basement of a building. ‘ The illustrated air conditioning apparatus coupriseS, in general, an air circulating system including a conditioning chamber or cabinet I ' The heat exchanger ‘I0 is of the ?n-ahd-tube type, having an inlet manifold or header l3 which is connected by an inlet pipe I‘ to the upper part of ‘the boiler 2 and from which a bank of ?nned tubes l5 extends horizontally across the compartment 1 to a return header l6. From the return header IS, a second bank‘ of finned tubes I‘I extends across the compartment 50 beneath the tubes l5 to a discharge header l8 which is connected by a return pipe l9 to the lower part of the boiler 2. The tubes l5 and II are so spaced and positioned that the air, in ?owing upward through the heat exchanger, 2 9,129,202 ?rst passes between the tubes I‘! of the lower bank and then passes between the tubes ii of the upper bank. As shown in the drawing, the heat exchanger I0 is arranged substantially at the level of the top of the boiler 2 to facilitate the circulation of hot water from the boiler through the water circulating system. In cold weather, when the system is being used for heating the building, 10 hot water from the top of the boiler 2 ?ows hori-' zontally through the inlet pipe l4 into and through the upper tubes l5 and then back through the lower tubes l’! of the heat exchanger I 0 in series relation, giving up a. portion of its 15 heat to the air in the compartment ‘I. The water then ?ows from the heat exchanger into the ver tically arranged return pipe I! and thence back to the bottom of the boiler. As the column of relatively cool water in the 20 vertical return pipe I9 is heavier than the cor responding column of hot water in the boiler, it descends by gravity, causing circulation by nat ural convection or thermo-syphon action through the heat exchanger. Because the heat exchanger 25 is positioned substantially level with the top of the boiler, the column of cool water in the re turn pipe I 9 is of. su?icient height to cause ef fective thermo-syphon action in the system. The air in the circulating system likewise is 80 caused to circulate by thermo-syphon action, the heated air in‘the compartment 1 rising into the outlet pipes H and being replaced by cool air from the compartment 6. To effect circulation ' . of the air by thermolsyphon action it is desirable 35 that the heat exchanger be placed as low as. possible in the air circulating system in order that mally closed by a close-?tting removable cover 26. The ?ue gases resulting from combustion of the fuel are conducted from the ?rebox by a smoke-pipe 21 that discharges into a chimney 28. A relatively small pipe 29 is connected between the smoke-pipe 21 and the upper part of the fuel hopper 24 for conducting ?ue gases from the smoke-pipe into the top of the hopper to be drawn downward through the fuel by the natural draft of the ?rebox to condition the fuel for feed-' ing and burning. The ?ue gases passing through the hopper, together with heat conducted from the boiler to the hopper, act upon the fuel there in in such manner that water vapor and certain gases are driven off and the fuel is otherwise so modi?ed as to prevent burning or clogging there of in the hopper or caking upon ?owing from the hopper into the ?rebox. The conditioned fuel flows into the ?rebox by gravity continually and 20 automatically at the rate at which it is required to replace the fuel consumed, thus maintaining a uniform bed of burning fuel on the ?rebox grate at all times. An opening 30 is provided in the side of the 25 ?rebox above the level of the fuel bed therein for introducing auxiliary air into the combustion chamber. To control theamount of auxiliary air introduced, the opening is provided with an adjustable cover 3|. The opening 30 ‘may be 30 utilized for starting the ?re when the hopper contains a supply of fuel, as kindling materials may be inserted through it into the ?rebox and ignited. A further function of the opening 3|! is to permit observation of the condition of the 35 ?re. the column of‘ heated air may be of sufficient The rate of combustion of fuel in the ?rebox height to establish a difference in weight between _ and the rate ‘of heating resulting therefrom is it and the corresponding column of cold air great regulated by a thermostat 32 so located as to be 40 enough to provide pressure for effective circula responsive to the temperature of the air in the tion. By positioning the heat exchanger at the rooms being heated and arranged to be regulated 40 level of the boiler top, the conditions necessary to maintain the air in the rooms at a predeter for thermo-syphon circulation of both the water mined desired temperature. The thermostat 32 and the air are met in manner to effect equally . is connected to a thermostat motor 33 in such 45 satisfactory circulation of each. manner as to energize it in response to changes The boiler 2 is provided at its top with an ex in the room temperature. The thermostat motor 45 pansion tank or chamber 20 that serves as a 33 is connected, by a continuous chain“ carried . storage reservoir for water which may be forced by pulleys 35, to operate a. draft door 36 ar out of the boiler when the water therein is ex ranged to control the admission of air into the panded by heat. The tank 20, being open to the ?rebox beneath the bed of fuel therein, and to atmosphere, also permits the escape of air or operate a check door 31 arranged to control the 50 ' steamthat might otherwise interfere with the admission of air into the base of the chimney 28 circulation of the water through the system, for checking the ?re. . should the pipe i4 become air~bound or steam When the temperature of the air in the rooms 55 gound by reason of becoming ?lled with either being heated falls below the predetermined de uid. sired temperature for which the thermostat is An adequate supply of water is automatically set, the thermostat and its associated motor maintained in the boiler at all times by means function to close the chimney check door 31 and of an inlet valve 2! that controls the in?ow of to open the draft door 36, thereby increasing the 60 water from a supply pipe 22 to make up for ’ draft through the ?rebox and increasing the water lost by evaporation or otherwise. The valve rate of combustion of fuel to furnish additional 60 2| is actuated automatically by a ?oat 23 resting heat to the boiler water. on the surface of the water in the expansion tank. The boiler is provided with a water temper The ?oat 23 covers substantially all of the sur ature regulator 38 that includes a thermo face of the water in the tank and greatly reduces 65 expansion element 39 disposed in contact with the absorption of air by the water when it cools the water in the boiler and connected by a link 65 below its boiling temperature, thereby avoiding ‘ 40 to a pivoted lever arm 4i on which is slidably corrosion of the interior of the water circulating mounted an adjustable counterpoise weight 42. system apparatus by air dissolved in the water. As the temperature of the boiler water increases Fuel for combustion in the ?rebox of the boiler/ in response to the action of the thermostat 32, 2' is fed into the‘ ?rebox automatically by gravity the thermal expansion element 39 expands and 70 from an air-tight fuel hopper 24 mounted on one pivots the lever arm 4!, lifting the weight 42. _ side of the boiler.‘ The hopper 24 may be ?lled When the water temperature reaches a prede periodically with solid fuel such‘ as coal or coke 75 through an opening 25 in ‘.ts top which is nor termined value, the lever arm 4| is pivoted to ' such position that "an electrical switch 43, pref 3 2,129,202 erably of the mercury type, mounted on the lever arm 4| closes and completes an electric circuit that leads from a power line 44 through conduc tors 45 to a motor 46 connected to a fan 41 dis 5 posed in the lower part of the intake compart ment 8. The fan is so directed as to increase the circulation of air through the system by forcing air from the intake compartment 6 into the dis charge compartment 1 and upward through the 10 heat ‘exchanger iii. The increased circulation " of air through the heat exchanger results in con veying additional heat from the hot water circu; lating through it and consequently tends to re ' duce the temperature of the water in the boiler. 15 The additional heat transferred from the boiler water is conveyed by the air to the rooms being heated and raises the room temperature in re sponse to the functioning of the thermostat 32. When the predetermined normal temperature 20 in the rooms is restored, the thermostat 32 actu ates the thermostat motor 33 to cause it to close the draft door 36 and to open the check door 31, thereby decreasing the rate of combustion of fuel in the ?rebox and reducing the amount of‘ heat 25 supplied to the boiler. ‘ When the temperature of the water in the boiler becomes reduced below a predetermined value, as a result of the action of the fan and of the reduced rate of combustion of fuel cf 30 fected by the thermostat, the thermal expansion element 39 contracts and permits the weight 42 to pivot the lever arm 4| in such manner as to open the switch 43 and stop the fan motor 46, thereby reducing the amount of heat supplied to 35 the rooms and preventing the room temperature from exceeding the predetermined maximum. If the predetermined normal temperature in the rooms is not restored within a short time, the temperature of the boiler water will con 40 tinue to increase while the fan 41 is operating in spite of the cooling eifect of the fan, and the water temperature regulator 38 will function, through a connection with the draft and check doors, to reduce the rate of fuel combustion and 45 prevent overheating of the boiler water. This action of the water temperature regulator will occur regardless of the fact that the thermostat motor 33 may be tending, at the time, to increase the rate of fuel combustion. To enable this result to be accomplished, the 50 continuous chain 34 of the draft regulating mechanism is connected to the draft door and to the check door by means of pulleys 48, one of which ismounted on each door, the pulleys being 55 arranged to rotatably receive the chain. The run- of the chain at the sides of the pulleys 48 .opposite from the run thereof that is connected to the thermostat motor 33, is attached to the end of the lever arm 4|, as shown. When'the. 60 temperature of the boiler water exceeds a pre determined maximum, .the lever arm 4| of the temperature regulator 38 is moved to the posi tion shown in the drawing and in so doing actu ates the chain 34 to close the draft door 36 and G5 to open the check door 31 independently of the action‘ of the thermostat motor '33. As the ther mal expansion element 39 which operates the arm 4| expands or contracts in accordance with ‘ temperature changes of the water in the boiler, 70 its vaction causes the temperature regulator 38 to actuate the draft door and the check door in modulating manner to maintain the temperature of the boiler water substantially constant. This arrangement prevents overheating of the boiler 75 water and prevents the formation of excess steam which would otherwise interfere with the circulation of the water through the heat ex changer III by steam-binding the pipe l4. , The water temperature which the regulator 38 will tend to maintain in the boiler and the temperature at which the fan motor will be started or stopped, may be regulated by adjust ing the position of the weight 42 along the lever arm 4|. An incidental effect of this adjustment is to regulate the amount of time during which 10 the fan 41 will operate under given conditions. For example, if the weight 42 is set to maintain relatively high water temperature the fan will not operate as much of the time as it will in de livering an equal amount of heat when the 15 weight 42 is set to maintain relatively low water temperature. The smoke-pipe 21 is made air-tight in order that the ?ue gases it conducts to the chimney 28 may surrender the maximum amount of heat 20 to the basement air and thus decrease fuel costs. Ordinarily, in the usual furnace installation a. check door is located in the smoke-pipe near the boiler, but the air it admits at this location so cools the ?ue gases passing through the, smoke 25 pipe that most of the ?ue gas heat is wasted, by escaping up the chimney. Also, deterioration of the smoke-pipe is ordinarily more rapid when air is admitted to it than is the case with the air tight design illustrated in the drawing. 30 For heating service water, an indirect water heater 49 is connected in a minor circulating sys tem paralleling the main circulating system through the heat exchanger. This minor circu lating system includes a pipe 58 leading from the 35 pipe M at the top of the boiler to the heater 49, and a pipe 5| leading from the heater to the return pipe l9 near the bottom of the boiler. The serv ice water circulates from the bottom of a hot water storage tank-.52, through a pipe 53 upward 40 into and vthrough a heating coil in the heater 49 and thence through a pipe 54 into the top of the storage tank. Water is supplied to the bottom of the hot water storage tank 52 through a pipe 55 that is connected to the supply pipe 22, and hot water is delivered from the top of the tank through a pipe 88 that leads to the various posi tions throughout the buildingatwhich the hot water is utilized. Circulation of water from the boiler through 50 thetheater 48 occurs because of the fact that the temperature of the water is lowered in imparting heat to the service water in the heating coil. Consequently, the column of water in the vertical ' return pipe 5| is cooler and denser than a corre 55 sponding column of water in the boiler, and the cool water column descends through the pipe 5| by gravity, causing circulation by natural convec tion. The circulating water in the pipe 5| is utilized 60 to provide heat for evaporating the water in the humidifying tank 9. As shown, the humidi?er is provided with a submerged heating coil 56 into which water may ?ow from the pipe 5| through a pipe 51 and from which it ?ows through a pipe 58 65 to the return pipe l8. The ?ow of water through the heating coil 55 may be regulated by a valve 59 in the pipe 51 and a valve 68 arranged to close the portion of the pipe 5| between the pipe 51 and the pipe l9. By manipulating these valves, the tem 70 perature of the water in the humidi?er may be controlled, thus regulating the rate of evaporation of the water and the humidi?cation of the air cir culating through the conditioning chamber. As a further means of controlling the action of the a 4 2,129,202 humidi?er, the amount of water surface exposed to the air may be regulated by covering a portion of the tank 9. - _ The level of the water in the humidifying tank 3 is maintained substantially constant by a float operated valve 6! which automatically admits water from a pipe 62 that is connected to the supply pipe 22 to replenish water evaporated in humidifying the air. To prevent corrosion of the 10 humidi?er or the formation of scale therein, chemicals of the nature ordinarily utilized in steam boilers for such purposes may be added to the water. ‘ 1 In front of the fan 41 and over the humidifying 15 tank 9, there is arranged a series of directing vanes 63 that turn the circulating air uniformly upward into the heat exchanger ill with minimum loss of energy. _ 6 Auxiliary air may be introduced into the cir 20 culating system through an auxiliary air intake pipe 64 extending from the intake compartment 6 out of doors for admitting fresh outside‘ air and having a damper 65 for controlling the volume of air admitted. A second auxiliary air intake pipe 25 '66 ‘opening into the basement is connected to the compartment 6 and is likewise provided with a damper 61 for controlling the volume of air admitted from the basement into the system. During warm weather the air conditioning. sys 30 tem is utilized for cooling and drying the air in the building. To adjust the system for this mode of operation, a valve 68 in the pipe l4 and a valve 69 transfer wherein the warmest air comes in con tact with the warmest tubes and the coolest air passes over the coldest tubes, the arrangement which is generally recognized as the most e?icient for the transfer of heat between ?uids. Dining the period in which the apparatus is being used to cool the air, the supply of water to the humidi?er 9 is interrupted by closing a valve ‘I1 in the pipe 62, and the water is drained from the tank by opening a valve 18 in a drain pipe 19. When the warm air from the rooms comes in contact with the cold tubes of the heat exchanger, the excess water vapor in the air condenses upon the surface of the tubes, thus re ducing the humidity of the air. The moisture 15 which collects on the tubes drips into the humidi ?er tank 9 and is drained away through the‘ open drain-pipe ‘I9. While the air circulating system is being uti lized to cool the air in the building, the boiler 2 20 may be used for heating the service water. To provide automatic regulation of the service water temperature, the thermostat 32 is rendered inop erative by_ adjusting it to a high temperature setting, in which position it will tend to hold the 25 draft door 36 open continuously and to hold the chimney check door 31 closed continuously. The adjustable weight 42 on the water temperature ' regulator 36 is then so positioned that the regu lator 38 will operate to close the draft door 36 30 and open the check door 31 in opposition to the tendency of the thermostat when the desired service water temperature is attained. The regu changer »ID from the boiler, leaving the minor, lator thus adjusted will maintain a low ?re in 35 circulating system through the service water' the firebox to heat the service water to a pre in the pipe I9 are closed to isolate the heat ex heater 49 connected ‘to the boiler. Cold water from the supply pipe 22 is then admitted to the heat exchanger through a pipe 10 having a control valve ‘II which leads into the pipe I4. ' From the pipe l4 the water ?ows through the upper bank of tubes l5 of the heat exchanger to the header l6 and then back through the lower bank of tubes I'I into the header is and the return pipe I 9 from which it escapes through a discharge valve 12 into 45 a discharge pipe 13. 'Ordinarily, the water dis charged through the pipe 13 is put to‘ some useful Purpose, as for supplying a fountain and pool or for watering the lawn or garden, such use being suggested by a faucet 14 which is provided at the 50 end of pipe 13 that ‘extends out of doors for attaching 'a hose. Refrigerated water or other .cooling ?uid may be circulated through the heat exchanger instead of water from the usual city’ supply. . For circulating the air through the circulating system while the cold water is passing through the heat exchanger, the fan motor 46 is operated to drive the fan 41 continuously. To provide for selectively operating the fan motor 46, a manually 60 operated push-button switch ‘I6 is arranged to connect the conductors 45 which lead to the motor » directly to the power line 44. Another push button switch 16 is arranged in the circuit of the determined temperature without further atten tion to the apparaus other than re?lling the fuel hopper 24, which ordinarily is necessary only at weekly intervals. Should changing weather con ditions, such as occur in the spring or in the 40 fall, make it desirable to change the mode of operation of the apparatus from cooling to heat ing because of a sudden drop in temperature, it is merely‘necessary to shut off the flow of cold water through the heat exchanger and re 45 connect it to the boiler by opening the valves 68 and 69. The hot water always available in the .boiler provides instantv heating effect and the continuously burning ?re can at once be placed under the control of the thermostat 32 to bring 50 the air in the rooms to the desired temperature. Although a speci?c air conditioning system has been described in detail herein for the purpose of clearly disclosing a practical embodiment of the invention, itis to be understood that the particu 55 lar structure set forth is susceptible of modi?ca tion without departing from the spirit and scope of the invention as de?ned by the subjolned_ claims. It is claimed and desired to secure by Letters 60 Patent: ' 1. An air conditioning system for serving a mutants’ °f spaces commune av conditioning ' mercury switch 43 on the lever arm 4! and may be chamber, a plurality of air intake pipes connect while the system is being used for cooling. The fan 41 forces the air upward ?rst through ed to said chamber for drawing air to be con 65 opened to render the mercury switch inoperative 35 ditioned fromv said plurality of spaces being served, air inlet pipes connected to said. the spaces between the lower tubes l1 and then chamberother for admitting air from other sources, through the spaces between the upper tubes I! of ' -70 the heat exchanger. In this manner the air ?rst means for controlling the amount of air admitted through said latter inlet pipes, an air ?lter ar-, comes in contact with and is cooled by the tubes ranged in said chamber in position to ?lter the 70 containing water that has been warmed some what, and then the partly cooled air passes over air drawn through said inlet pipes, a humidifying the tubes containing the cold water. This is in apparatus arranged in said chamber to humidify 75 accordance with the counter?ow principle of heat the ?ltered air, rcgulatable means arranged to heat said humidifying apparatus for regulating 2,129,202 the humidifying action thereof, a heat exchanger _ arranged in said chamber to heat said ?ltered and , humidi?ed air and to cause it to circulate through said chamber by thermo-syphon action, a plu rality of delivery pipes connected to said cham ber for receiving and distributing the conditioned air to said plurality of spaces, a fan arranged in said chamber for assisting the circulation of air therethrough, and means operative in response 10 to conditions in said spaces being air conditioned for controlling the operation of said fan. ‘2. An air conditioning system 4 for alternate heating and cooling of an enclosed space, com . prising a boiler for heating water, a heat ex 15 changer, means connecting said heat exchanger to said boiler in such manner as to permit ?ow of hot water from said boiler through said heat exchanger by thenno-syphon action, an air con dltioning chamber enclosing said heat exchanger, 5 in and to maintain a uniform fuel bed, and means for conducting ?ue gases from said ?rebox through the fuel in said hopper to condition it for uniform automatic feeding into said ?rebox whereby completely automatic space heating by the combustion of solid fuel is effected. 4. A space heating system, comprising a boiler for heating water and having a ?rebox provided with, draft control dampers, a heat exchanging radiator connected to the top and to the bot tom of said boiler and disposed horizontally at the level of the top of said boiler in position to , facilitate thermo-syphon circulation of water therethrough, an air conditioning chamber hav ing a vertically disposed compartment enclosing 15 said heat exchanging radiator and arranged to direct air upward therethrough, air pipes con necting said chamber to the space being heated and arranged to facilitate thermo-syphon cir culation of air through said radiator and into 20 through said chamber in contact with said heat said space being heated, a ?lter disposed in said exchanger and into the space being served to heat chamber in position to ?lter the incoming air, a said space, means for automatically regulating humidifying tank disposed in said chamber be said boiler in response to conditions in the space neath said radiator to humidify the ?ltered air, 25 a fan disposed in said chamber and operative to 25 being served with conditioned air, a tank for stor ing warm service water, a service. water heater accelerate the circulation of air through said heat exchanging radiator, means responsive to connected to be heated by said boiler and ar ranged to supply warm water to said service the temperature of the water in said boiler con water tank, means for closing said heat exchanger * nected to'cause said fan to operate when said 30 30 connecting means'to isolate said heat exchanger water attains a predetermined temperature and from said boiler, means for circulating cooling connected to so regulate the draft control damp ?uid through said heat exchanger when isolated ers of said ?rebox .as to tend to maintain the boiler water temperature uniform, and means from said boiler to cool the space being served, responsive to the temperature of the air in the and means for automatically regulating the ?re space being heated and connected to superim 35 in said boiler in response to the temperature pose its, action upon that of the water tempera of the water therein in manner tending to main regulator to so regulate the draft control tain the water temperature substantially con— ture dampers of said ?rebox as to tend to maintain stant to heat service ‘water automatically for uniform temperature in said heated space. storage in said service water tank while said heat 5. An air conditioning system for conditioning 40 20 means for circulating air being conditioned 40 exchanger is being utilized for cooling the con- ' air in a plurality of spaces, comprising a cabi , ditioned air thereby keeping the ?re active and net of substantially rectangular shape provided instantly available for heating. the space be ing served upon opening the connecting means between said boiler and said heat exchanger. 3. A space heating system for automatic heat 45 ing by the combustion of solid fuel, comprising a boiler for heating‘ water and having a ?rebox for burning solid fuel provided with draft con trol dampers, a heat exchanging radiator con 50 nected to the top and the bottom of said boiler and disposed substantially at the level of the top of said boiler in position to facilitate thermo syphon circulation of water therethrough, an air conditioning chamber enclosing said heat ex with a medially disposed dividing wall extend ing from the top thereof downwardly dividing the cabinet into an intake compartment and a 45 discharge compartment with a connecting pas sageway along the bottom thereof, a plurality of inlet pipes connected to the top of said intake compartment for admitting air to be conditioned, a ?lter arranged in said intake compartment be 50 neath said inlet pipes to ?lter said air, a fan dis posed in said intake compartment beneath said ?lter and directed towards the connecting pas sageway for circulating air through said cabinet, a humidifying pan disposed on the bottom of the , changing radiator and arranged to facilitate discharge compartment in front of said fan in thermo-syphon circulation of air through said position to receive an air blast therefrom, means - radiator and into the space being heated, a fan in said humidifying pan for heating water there disposed within 'said chamber and operative to in to humidify the air blown over the water by accelerate the circulation of air through said heat said fan, a heat exchanger disposed directly 60 exchanging radiator, means responsive to the above said humidifying pan in said discharge temperature of the water in said boiler connected compartment for heating said air, and a plu to cause said fan to operate when said .water rality of outlet pipes connected to the top of said attains a predetermined temperature to acceler discharge compartment for delivering the con ‘ate' the transfer of heat to the space being heated ditioned air to a plurality of spaces being served. 6. An air conditioning system for conditioning '65 and for so regulating the draft control dampers of said ?rebox as to tend to maintain the boiler air in a plurality of spaces in a building, com water temperature uniform, means responsive to prising a cabinet divided by ‘a medial dividing the temperature of the air in the space being wall into an intake compartment and a discharge heated and connected to superimpose its action compartment connected by a horizontal passage upon that of the water temperature regulator to along the bottom thereof, a plurality of air inlet so regulate the draft control dampers of said connectedto the top of said intake com ?rebox as to tend to maintain the temperature of pipes partment and communicating with the plurality said air constant, a fuel hopper disposed to auto of spaces being conditioned for drawing air there matically feed fuel by gravity into said ?rebox from, an auxiliary air inlet pipe connected to the 75 continuously to replace the fuel consumed there 6 2,129,202 top of said intake compartment and communi 9. A space heating system comprising a boiler cating with the exterior of the building for ad for heating water by the combustion of fuel and ' mitting outside air into the system, means for controlling said auxiliary air inlet to regulate the having draft, control means, a lever pivotally mounted on said boiler and connected to operate amount of outside air admitted into the system, ‘said draft control means, a thermo-expansive an air ?lter arranged in said intake compart ment beneath said inlet pipes in position to ?lter temperature responsive means associated with said boiler and connected to-rock said lever in air drawn into said intake compartment, a fan accordance with changesin temperature of said disposed in said intake compartment beneath said 10 ?lter and directed toward the horizontal pas boiler water to actuate said draft control in man ner tending to maintain the temperature of said 10 sageway into the discharge compartment, a hu midifying pan disposed in the bottom of said boiler water substantially constant; means respon discharge compartment in position to receive a sive to the temperature of the space being heated blast of air from said fan for humidifying said and arranged to change the connection between 15 air, a heat exchanger disposed in said discharge said lever and said draft control means upon the compartment above said humidifying pan for temperature of said space falling below a prede 15 ~ heating said air, and a‘ plurality of outlet pipes connected to the top of said discharge compart ment and communicating with the plurality of 20 spaces being conditioned for delivering condi tioned air to said spaces. I 7. An air conditioning apparatus adapted for installation in the basement of a building for con ditioning the air in other parts of the building, termined minimum value to cause said tempera ture responsive means to tend to maintain said boiler water at a higher temperature than is maintained when said space temperature is above said minimum value, means controlled by said 20 pivoted lever for increasing the rate of delivery of heat to the space being heated upon said boiler water exceeding a predetermined temperature, and a weight slidingly mounted on said pivoted medial dividing wall separating it into an intake lever for adjusting the relation of said lever to said thermo-expansive means to regulate the tem compartment and a discharge compartment con perature of said boiler water and the operation of nected by a horizontal passage along the bottom thereof, an air inlet pipe ”connected to the top said heat delivery increasing means. 30 of said intake compartment and communicating 10. In a space heating system for closely regu with the part of the building. being served to lated heating by the combustion of solid fuel, the withdraw air therefrom for conditioning said air, combination with a boiler for heating water pro an auxiliary air inlet pipe connected to the top vided with a ?rebox for the combustion of solid of sad intake compartment and communicating fuel, of means for feeding solid fuel into said ?re35 with the exterior of the building for admitting box uniformly by action of gravity, means for» regulating the draft of said ?rebox to control the outside air into said cabinet, means for control ling the amount of outside air admitted through rate of combustion of said fuel therein, means re 25 comprising an air conditioning cabinet having a 25 30 ‘ 35 said auxiliary inlet pipe, an auxiliary air inlet sponsive to the temperature of water in said boiler opening in the top of said intake compartment and adapted to exert force for moving said draft for admitting basement air into said cabinet, _regulating meansvin modulating manner in ac means for controlling the amount of basement cordance with changes in the water temperature 40 air admitted through said auxiliary opening, an and proportionately thereto, means for adiust a air ?lter arranged in-said intake compartment ing said water temperature responsive means to change its range of movement relative to the tem below said air inlets in position to ?lter the in 45 coming air, a fan disposed beneath said ?lter perature of said boiler water, adjustable operat-v to circulate air from said intake compartment ing means connecting said water temperature re 45 into said discharge compartment, a humidii’ying sponsive means to said draft regulating means to pan disposed in the bottom of said discharge enable modulating operation of said draft regu compartment to'humidify-said circulating air, a lating means in accordance with changes of boiler water temperature to control the rate of combus 50 heat exchanger disposed in said discharge com partment above said humidifying pan to heat tion in said ?rebox in manner tending to main 50 said air, and an air outlet pipe connected to the tain said boiler water at a uniform temperature determined by the adjustment of said water tem top of said d'scharge compartment and commu nicat‘ng with the parts of the building being perature responsive means, and means responsive to the temperature of the air in the space being 55 served to deliver conditioned air thereto. 8. A heating system, comprising a'boiler for heated connected to said adjustable operating 55 means in manner to change the relation of said heating water, a heat exchanger cabinet associ ated with said boiler, a radiator disposed in‘ said water temperature responsive means to said draft heat exchanger cabinet and connected to said regulating means to effect greater opening of said boiler for transferring heat from said boiler to draft regulating means ‘when the air temperature air in said heat exchanger, a humidifying pan falls below a predetermined minimum tending to 60 vvd'sposed in the bottom of said heat exchanger maintain said boiler water at a higher tempera cabinet for evaporating water to humldify the air ture than obtainswhen said air temperature is being heated. a heating coil in said humidifying above said predetermined minimum, and means controlled by said watertemperature responsive pan for heating water therein, a circulating sys tem connecting said humidifying pan heating coil means for increasing the rate of heat movement 65 with said boiler, and a service water heating coil > to said space being heated upon the temperature connected in saidxcirculating system near the of said boiler water exceeding a predetermined top of said boiler and arranged to heat service maximum. '70 water by transfer of heat from said boiler water, 11. A space heating system comprising a boiler whereby circulation of boiler water through said for heating water by the combustion of fuel, a 70 heat exchange radiator associated with saidboil humidifying Dan heating coil is effected by rea er, a water circulating system connecting said son of the drop in temperature of said boiler wa ter in said service water heating coil resulting in radiator to said boiler in manner to provide ther 76 thermo-syphon action in said circulating system. mo-syphon circulation of boiler water through said radiator, an air circulating system enclosing 75 2,129,202 said radiator and disposed in manner to provide thermo-syphon circulation of air ..through said radiator and into the space being heated, combus tion control mechanism associated with said boil er for regulating‘ the rate of fuel combustion therein, means responsive to the temperature of water in said boiler for continuously regulating said combustion control mechanism in modulat ing manner tending to maintain the temperature 10 of said boiler water substantially constant, means responsive to the temperature of. the air in the space being heated for changing the relation of said water temperature responsive means and said combustion control mechanism to cause said wa 15 ter temperature responsive means to actuate said active operation while isolated from said heat ex— changer and is therefore instantly available for quickly heating the space being served upon open ing said closing off means to admit hot water from said boiler into said heat exchanger. 13. An air conditioning system for selectively heating or cooling an enclosed space, comprising a boiler for heating water, a heat exchanger ar ranged to serve said enclosed space, means con necting said heat exchanger to said boiler in man 10 ner to permit circulation of hot water from said boiler by natural convection through said heat ex changer to heat said space, manually operable means to close o?’ said connecting means to iso late said boiler from ‘said heat exchanger, a service 15 water heating system associated with said boiler including a tank for storing heated service water and a water heater disposed to be heated by said perature upon the space temperature falling be low a predetermined minimum than is maintained boiler and connected to supply hot water to said storage tank, means arranged to circulate cooling 20 20 when the space temperature is above said pre ,iiuid through said'heat exchanger while it is iso determined minimum to increase the rate of heat lated from said boiler by said closing off means to ing by said boiler, a fan disposed in said air cir cool said space being served, and means for auto culating system in position to augment the circu lation of air therethrough, and means actuated matically regulating said boiler in response to the temperature of ' the water therein in manner 25 25 by said water temperature responsive means con trolling the operation ’of said fan to cause it to ‘tending to ‘maintain the water temperature sub operate when the temperature of said boiler water stantially constant to provide modulated regula exceeds a predetermined maximum to increase tion thereof while said boiler is functioning to heat said space and to provide for automatically the circulation of air through said radiator there 30 30 by increasing the rate of delivery of heat from heating service water to a predetermined tem perature for storage in said tank while said boiler said radiator to the space being heated and con sequently increasing the rate of thermo-syphon is isolated from said heat exchanger whereby said boiler is maintained in active operation while iso circulation of water through said radiator to in crease the rate at which heat is conveyed from lated from said heat exchanger and istherefore combustion control mechanism in manner tend ing to maintain said boiler water at a higher tem said boiler to said radiator. ’ . 12. An air conditioning system for selectively heating or cooling an enclosed space, comprising a boiler for heating water, a heat exchanger ar_ ranged to serve said enclosed space, means con necting said heat exchanger to said boiler in manner to permit circulation of hot water from instantly available for quickly heating the space 35 being served upon opening said closing o? means to admit hot water from said boiler into said heat exchanger. 14. The method of operating a heat exchange system which comprises circulating a-heat con 40 ducting medium through a boiler in circuit with a heat exchanger and a storage water heater during cold weather, and isolating the heat ex changer from the boiler and storage water heater changer, a service water heating system associ-' in warm weather and passing a cooling ?uid 45 ated with said boiler including a tank for storing through the heat exchanger, and maintaining the said boiler through said heat exchanger to heat .said space, means to close off said connecting means to isolate said boiler from said heat ex , heated service water and a water heater disposed boiler in operation to provide heat ‘for the storage to be heated by said boiler and connected to sup ply hot water to said storage tank, means ar water heater and to provide reserve heat for the I ranged to circulate cooling ?uid through said heat heat exchanger. . 15. combination, a boiler, a hot water stor 50 age tank, a cabinet, a heat exchanger in said cabi net, a fan for forcing air through said cabinet, a exchanger while it ‘is isolated from said boiler by said closing o? means to cool said space being served, and means for automatically regulating - source of cold water supply, adjustable means said boiler in response to the temperature of the connecting said heat exchanger with said source, water therein in manner tending to maintain the said boiler and said storage tank whereby air may 55 be heated or cooled in said cabinet while the boiler water temperature substantially constant to pro remains in operation, and thermostatic means for vide modulated regulation thereof while said boil automatically controlling said boiler for air heat er is functioning to heat said space and to pro vide for automatically ‘heating service water to a ing requirements, said means also controlling the predetermined temperature for storage in said boiler for storage water heating while the cabi tank while said boiler is isolated from said heat net is serving as a cooling means. exchanger whereby said boiler is maintained in MONTROSE K. DREWRY.