Патент USA US2121639код для вставки
Julie 21, 1938V ‘2,121,639 w. o. LUM I HOT WATER HEATING CONTROL DEVICEv Original Filed_ July 6, 193a FiglQ . IDVéhtO'Y': ' ’ Walter ' by 7/ is Attorney. 2,121,639 Patented June 21, 1938 ' UNITED STATES , PATEN'l‘r orrlca amuse I , . HOT WATER HEATING CONTROL DEVICE ' Walter 0. Burn, West Caldwell,\N. J., assignor to General Electric Company, a corporation of” New York ' ' Original application July 6, 1933, Serial No. 679,172. Divided and this application March 24,1936, Serial No. 70,603 2 Claims, (01. 103-87) unit i2 is operated by means Of the electric motor ‘ll under the, control of the room thermostatic This application is a division of my prior ap plication, Serial No._ 679,172, ?led July 6, 1933, and relating toheating systems. The present invention'relates to an improved ' form of hot water heating control device, par switch‘ It. ~ , f The improved construction of the v?ow control unit I2 is shown in Fig. 2. The tubular casing oi ticularly' adapted for use in thermostatically con 20 is formedto house the check valve 2| and the trolled hot water house heating systems, although impeller pump 22 with the operating motor |‘| ’ the invention is not necessarily limited thereto. The principal object is to provide an improved form of electrically operated circulation control ‘unit especially constructed for connection into resiliently suspended from the casing 28 and. yieldingly connected to drive the impeller pump 22. ‘The casing 20 is provided with the ?anges the supply main of a hot water heating system 23 at the end thereof so that the control unit may be readily mounted by means of the cooper for insuring positive and rapid‘ circulation of the hot water when heating is required and for pre-' This permits the flow control unit to be easily ' ' venting circulation when heating is not required. It is a further object to provide an improved form of hot water circulation control unit which may be electricallyfoperated under the control ' of a thermostatic switch and arranged to give . quiet, e?icient and trouble free operation. ating ?anges 24 in the hot water pipe main l3. removed for inspection or repair or'another unit substituted therefor without seriously disturbing thelpipe connections. ' ‘ ' ‘ . ' e check valve 2| operates about the pivot .25 in cooperating relation with the valve seat 28 which is preferably mounted at an angle in the Another object is to provide suchan electrically ‘tubular casing 20, (as shown. A restricted air operated circulation control means in which the bleéder passage 21 permits air-entrapped in the rate of circulation can be readily adjusted or hot water system to pass when the check valve 2| is closed. The petcock 28 is provided for releas controlled. In the preferred embodiment of the present ing the entrapped air from the system.v The re 25 invention,- a tubular housing'unit is provided with movable cover plate 29 provides 'access tonthe check valve 2| and carries the adjustable stop 38 ?anges at the ends thereof 'for facilitating, con nection into the hot water piping system.’ The which determines the extent to which the check housing‘ unit/is specially formed to combine a valve 2| may be opened and hence the rate of cir 30 30 circulation check valve and electric motor driven culation ‘through the hot water system. impeller pump for controlling the hot water cir culation there/through. . The various. 'advanta- . ‘Thetubular ‘casing 20 is provided with an in- ' ner dividing wall 35 extending substantially lon geous features will be more fully understood from gitudinally and horizontally ofthe casing and the following description of the accompanying‘ ‘provided with the opening 38' therethrough for drawing illustrating the preferred embodiment‘ forming the inlet of the impeller pump housing. thereof. Fig. 1 shows the improved hot water. The-impeller.“ of the pump,, as more clearly circulation controledevice of the present inven-. shown in Fig"; 3, ‘is provided with a hub 81 for tion connected in a hot :water heating' system mounting upon the upper end of the pump shaft 38 and has the three pump blades 88 joined at of the improved type disclosed ininy above men their" lower sides to the annular shroud 40. The 40 tioned prior application. Fig.‘ 2 is a cross-sec ~ tional view showing the detailed construction of water passes upwardly through the centralopen the improved controlunit and Fig'. 31s a perspec_ ing formed in the shroud 40 and is ,forced out tive view showing the form of the pump impeller. radially bythe blades 88. A restricted air bleeder ' passage _-4 I prevents _ acc umulation of air in the _ In the hotlwater heating system shown. dia 45 grammatically"in Fig.‘ 1, the, hot waterv is cir pump housing; a , v b’ LI culated through the room heating radiator ill _ ~ _A support or bearing bracket 85 carries the end ' from the hot water oil burner boiler furnace v| l. ‘thrust bushings “for the pump shaft 38. This The boiler furnace “ii is shown as of the .type bushing bracket togetherv with the motor sup port 4] are ‘fastened to the casing 28 by means of 6 described ‘and claimed in Patent 1,995,185 a1 though the present invention maybe used with the bolts I 48. .To hold the pump impeller 22 in 550 any other type of hot water boiler furnace -de-' position “and provide a water-tight seal for the shaft 38, a yielding bellows member 80 is joined sired. The improved hot water circulation con trol device I2" is connected in the 'pipe main i8 _ .to a sealing end thrust washer 8|. The spring of the heating system extending from the top. of 83 forces the sealing washer 8| against the hear the boiler furnace II. The circulation control ing shoulder 8'4 mounted on the shaft 38 so as 55 65 2 2,121,039 to bias the shaft 38 vertically upwardly and there by maintain the impeller 22 in proper operating circuit to the circulator motor I‘! and the oil burner motor 1i. ' In order that the water in the boiler furnace 1 may be always maintained at a high tempera ture to provide proper heating of the domestic 21 bearing bracket 45 will be prevented from passing hot water heating coil 13 and to insure a reserve to the inside of the bellows member. A cap 55 supply of heated water so that the hotwater is screwed on the bottom end of the support 45 heating system can be supplied with hot water as soon as the pump is put into operation, a. suit to secure the bellows member 50 in place. able thermostatic switch 14 is provided for sep 10 The electric driving motor I‘! is resiliently sus pended from the motor supporting bracket 41. arately starting operation of the oil burner mo tor ll whenever the temperature of the water in For this purpose the motor is secured to a sup porting ring 60 which has mounted thereon the ' the boiler furnace falls below a predetermined studs 6 I. The motor may be removably mounted value. This is particularly advantageous in pro 15 on the ?oating ring 62 by having a bayonet slot viding for an adequate supply of domestic hot connection between the ring Biand the studs water both in summer and in winter even through position in its housing. This at the same time provides a water-tight seal so that any water which may find its way into the interior of the 6!, for example, whereby the motor may be read ily released from the ?oating ring 62. The ?oat _ the room thermostat l4 may not cause operation of either the water circulating motor I‘! or the ing ring 62 is supported .by cushion members ' oil burner motor ‘H during the summer time. What I claim as new and desire to secure by 20 20 having the resilient portions 63 fastened to ele Letters Patent of the United States, is: ments 54 and 65 and held in place by the screw 1. A control device for a hot water heating threaded nuts 65 and 61. Thus one end of the system comprising a horizontal tubular casing provided at each end, with means for connecting‘ the casing'in the hot water piping system and 25 resilient member 63 is supported by the motor support 41 and in turn supports the ?oating ring 62. This cushioned support prevents motor vi bration from being transmitted to the heating having adjacent one end thereof a horizontally piping system. The impeller pump preferably is driven through a ?exible coupling 10 which is' extending dividing wall with an opening there through opposite an opening in the bottom wall torque variations to prevent transmission of noise and vibration to the heating system when the motor I1 is energized to operate the pump. of the casing to form a centrifugal pump housing and adjacent the other end thereof a check valve 30 housing, a check valve movably mounted in said valve housing and biased to the closed position, a pump shaft having a bearing bracket mounted The flow control unit 12 is so connected in the 35 hot water pipe main I3 that thermal siphon cir culation of the hot water tends to ?ow from left in and sealing the opening in the, bottom wall of said casing and provided with spring thrust 35 bearing sealing means biasing the shaft vertically shown as of the type using resilient material in 30 terposed between solid material for taking up to right through the casing, 20. Thus, it will be upward into said casing in predetermined align seen that the normal tendency is to maintain the check valve 2| closed when the pump is not being ment with said opening in said dividing wall, 40 operated. The water is circulated through the casing 20 from right to left when the impeller pump is operated,.the check valve 2| opening in its bias, a motor supporting bracket mounted on ' response to the pressure differential created by said bearing bracket and extending downwardly from said bearing bracket, and an electric 'motor suspended from said support and connected with the pump. 45 an impeller mounted on the upper end of said shaft for forcing circulation of the hot water 40 through said opening to open said valve against _ The improved flow control device of the pres ent invention may be operated in a heating sys tem such as shown in Fig; 1 in the following manner although it may be used in other ways, if desired. when heat is called for by closing of the room thermostat l4, the electromagnetic switch I5 is energized thereby completing the energizing circuit for both the water circulating motor I1 and the oil burner operating motor ‘II. the lower end of said shaft for driving said im peller. , 2. .A circulation control unit for a hot water heating system comprising a horizontal tubular casing having a centrifugal pump housing with 50 a vertical ,axis formed inside one end thereof and a check valve housing formed inside the other end thereof, a check valve mounted in said valve This causes fuel to be supplied to the combustion housing and biased ‘to closed position for pre chamber of the furnace ii and heat to be trans ferred from the products of combustion to the water in the boiler. The pump operates to cir culate the hot water through the heating system venting passage of hot water through said cas ing, an impeller mounted in said pump housing, an electric motor mounted on said casing and connected to drive said impeller to force circula tion of water through said casing to open said check valve against its bias, and means compris 60 in a direction counter to the normal thermo 00 syphon ?ow of the heating medium. In case a separate'check valve ‘I2 is used in the return line - ing a pair of restricted air bleeder passages ex-' of the hot, water heating system as shown in tending inside said casing and adjacent the upper Fig. 1, it will be understood that the valve 12 is wall thereof, one through said pump housing and the other through said check valve housing for ' so connected as to open against its biasto permit circulation whenever the circulating pump 22 is operated. When su?icient heat has been supplied by means of, the radiator iii, the room, thermo stat l4 opens the energizing circuit of the elec tromagnetic switch i5 which in turn opens the passing air_through said casing independently of the operation of said impeller and said check valve.‘ ' , WALTER. O. LUM. i . ‘ -e..