Патент USA US2112655код для вставки
March 29, 1938. 2,112,655 c. H. MoRRow WATER HEATER ' Filed April 9, 195e im /ia Fla-3 _Ilu Fl G74 _ INVENTOR CLARENCE - H. MORROW FIG."2 BY 2,112,655 Patented Mar. 29, 1938 - UNITED STATES PATENT OFFICE 2,112,855 WATER HEATER Clarence H. Morrow, Shaker Heights, Ohio, as signor to The Hotstream Heater Company, Cleveland, 0hio, a corporation of Ohio Application April 9, 1936, Serial No. 73,510 6 Claims. (Cl. 122-494) This invention relates to improvements in wa ter heaters and particularly to certain features of an enclosing cabinet structure combinedwith the heater combustion system. « Water heaters of the type including a water 5 reservoir and a heating unit therebeneath when designed to reduce the overall height thereof, position the heating unit below the reservoir and relatively close to the surface upon which the heater is supported. 'I'hese heaters are some 10 times placed upon wooden floors and, to insure against fire hazard, building codes specify that the temperature of the floor below such burners shall not exceed a certain upper limit. My in vention provides novel means for insuring against l Ul the overheating of the surface upon which the water heater rests. When control equipment for heaters using gaseous or volatile fuel is housed within a cabinet there is an explosion hazard in case fuel should leak into unventilated pockets in the cabinet. My invention provides novel means for ventilat ing the portion of the cabinet housing thefuel supply and control equipment. The novel structural features by which I carry ' out my invention will be more 'clearly understood from the accompanying drawing and specifica tion and the essential features thereof will be set forth in the claims. I In the drawing, Fig. 1 is-a sectional elevation of a’water heating device embodying my invention; and-Figs. 2, 3 and 4 are sectional views along similarly mounted lines of Fig. 1. y I have illustrated my inventionas applied to that type of water heater which utilizes gas or IJ CA similar fuel for the heating of the water, but it- will be understood that a similar structure within the scope of the appended claims may be utilized with an electric or other heating unit. In the form shown, a water reservoir III is 40 burner I1 in a well known manner and the supply of fuel is in accordance with the demand for hot water removed from the reservoir. 'I'he products of combustion from burner- I1 pass upwardly through a flue 20 which is supplied with suitable 5. damper means. as is usual. The generally vertical transverse partition I5 and the generally vertical cylindrical reservoir partition 22, together with the generally hori zontal partition I3a_ and the generally vertical 10 side walls of the cabinet I3 and the lower head of the reservoir I0, form an upper chamber com- - partment substantially enclosing the burner I'I. Generally vertical walls I3b, here shown as in tegral with the generally horizontal partition I3a, extend below the cabinet proper on all sides thereof and form a base which holds the cabinet. and the parts therein, slightly above the ñoor or other surface 23 upon which rests the present water heater, said walls I3b being provided with inwardly extending bottom ñanges I3c, as shown. A lower chamber compartment 24 is therefore formed within the base and below the generally horizontal partition I3a thereof, as will be readily understood. One or more openings 25, three be ing here shown, are provided in the front end 25 portion of the partition I3a, and the upper cham ber compartment is provided with suitable open ings 26 and 21, in the partitions I5 and 22, re spectively, so that communication is provided be tween the lower chamber compartment and the upper chamber compartment. For the lower chamber compartment, suitable air inlet means remote from the openings 25 is provided, and in the embodiment here shown, air inlet openings 35 28 are provided in the rear base wall I3b, which wall is farthest removed from the openings 25, and other air inlet openings 29 are provided in the rear end portions of the side base walls I3b. It is to be understood, however, that any air inlet 40 supplied with the usual water inlet pipe I2 and openings for the admission of secondary air to outlet pipe I I. A cabinet I3 surrounds the entire unit and is provided with a removable front door I4 and the generally vertical transverse par points removed from the opening or openings 25, thev lower chamber compartment, at a point or are suilicient for the purpose, so long as a suf fìcient volume of secondary air is forced to flow 45 water reservoir and in which insulating material across the lower surface of the partition I3a for the protection of the iloor or other surface 23 I6 may be packed if desired. A burner I1 is sup ported by a bracket I8 secured to a generally upon which rests the present water heater. With the above described construction, when horizontal partition ñoor I3a of the cabinet I3 and the burner is supplied with a suitable fuel ` the burner I1 is in operation, the products of 50 Ui O such as gas through ~a_ suitable connection I9. combustion passing out the iiue 20 cause convec tion currents in the direction of the arrows, The usual control members, such as valves, ther mostats, a pilot and the like, are‘indicated in Fig. 1, so that relatively cools secondary air for the drawing but need not to be described here. the burner I'I is caused to enter the lower cham „ tition I5 forming a compartment Iadjacent the It is suilicient _to say that the gas is supplied to ber compartment through the inlet openings 28 55 9, 1 13,655 or20orboth,saidsecondaryairpassingtothe partment and remotely located relative to said left as viewed in Fig. l. beneath the partition Ila, air passageway, whereby said floor or other sur then-through vthe openings 2l, 2l and 21 tothe upper chamber compartment. in which the burner I1 is located, and thence out through the face is protected from the heating effects of said heating unit by said insulating member and by the air which enters the lower compartment ?ue.- Such a current of cool air passing below through the air inlet means thereof and which passes beneath said lpartition to said air pas tbe partition ita will cool the partition, which would normally be a metal plate, and thus pro tect-the floor or other surface 2l from excessive heat due to the close proximity of burner i1. As an additional protection to minimize the men . heat reaching the ?oor or other surface 23 from the burner I1, I provide heat insulation II- be tween the burner i1 and the door or other sur face 2l. 'I‘his insulating material. if desired, may 2. In a water> heater having a water reservoir 10 and a fuel burner unit-therebeneath and located a relatively short distance above a floor or other surface, a casing forming a substantially closed chamber between said reservoir and said floor or other surface and enclosing said burner unit, a 15 be incased in a metal housing `32, as here shown. partition beneath said burner unit and spaced and securely bolted to the partition Ila by the above said floor or other surface and dividing s_aid chamber into an upper burner compartment be tween said reservoir and said partition and a lower air compartment between said partition 20 and said floor or other surface, said partition under said burner unit being uninterrupted, a flue communicating with said upper compart ment for the flow therefrom of products of com bustion, an air passageway through said partition 25 establishing communication between said upper and lower compartments for the ñow of air from said lower compartment to said upper compart members 22. f - , I find that by utilizing the construction above described, I can place the water reservoir of the heater very close to the floor 22, which places the burner I1 still closer to the floor, but with the protection here shown and described I am able to hold the temperature of the floor at a point 25 low enoughto prevent charring or burning of a combustible floor 23 and well below the temper atures specified in those building codes with which I am familiar. It will be noted that in the front or left por 30 tion of the cabinet i3 as viewed in Fig. 1, a chamber 2l is formed between the door il and the transverse partition I6, which chamber 2| houses the fuel supply and control equipment. If .the space in this chamber is dead space, any ment, and air inlet means in said casing and be low said partition for the lower compartment, said air inlet means being remotely located rela tive to said air passageway, whereby air drawn through said inlet means into said lower com more openings I0 for the ingress of air into cham partment ñows beneath said partition, with a cooling effect thereon, to said air passageway and thence into said upper compartment. 3.‘In a water heater having awater reservoir ber 2| may be provided, and by locating the open and a fuel burner unit therebeneath, a cabinet ings lli at a point removed from the source of enclosing said reservoir and said burner unit, partition means- providing an upper compart 40 ment in which said burner unit is located and a lower compartment, air inlet means for said lower compartment and a products of combustion out let means for said upper compartment, and an 35 leakage of fuel therein may cause a dangerous condition. To avoid such a contingency, one or 40 sagezvay and thence into said upper compart suction, namely, from the'opening 28 in the par tition I5 which leads to the upper chamber com partment and to the flue 2li, I insure good venti lation for chamber 2|. By making the air inlet openings 2l and 29 insufllcient to supply a proper 45 amount of secondary air to the burner I1 and less than the capacity of nue 20, I insure that some secondary air will be drawn through open ings ll. At the same time, the openings il are small- enough to insure suflicient draft through 50 the air inlet openings 28 and 2l to create the cooling eßect desired in the lower chamber com partment for the proper protection of the floor or other surface 23, all as will be readily under stood. ' What I claim is: l. In a water heater having a water reservoir and a water heating unit therebeneath and located a relatively short distance above a floor or other surface, a casing forming a substantially 60 closed chamber between said reservoir and said i'ioor or other surface and enclosing said heating unit, a partition beneath said heating unit and spaced from said ñoor or other surface and di viding said chamber into an upper'burner com 55 65 partment between said reservoir and said parti tion and a lower air compartment between said. partition and said floor or other surface, a heat insulating member under said heating unit and adjacent said partition, a flue communicating 70 with said upper compartment for the now there from of products of combustion, an air passage way establishing communication between said upper and lower compartments for the flowr of air from the lower compartment to the upper com 75 partment, and air inlet means for said lower com air passageway establishing communication be tween said lower and upper compartments for the flow of air from said lower compartment to said upper compartment, the air inlet means for said lower compartment being remotely located rela tive to said air passageway, the two compart 50 ments being otherwise sufficiently closed so that a large proportion of the secondary air supplied. to said burner unit ñows through said lower com partment and across the lower surface of said partition means, with the consequent production of a cooling effect upon said partition means. 4. In a water heater having a water reservoir and a compartment therebeneath in which is located a fuel burner, said water heater also hav ing a flue communicating with said compartment for the flow therefrom of products of combus- ~ tion, control apparatus for the supply of fuel to said burner, cabinet means having a chamber for said control apparatus, there being an air pas sageway between said chamber and said burner compartment and there being an air inlet means in said cabinet means for the flow of air into said chamber, the air inlet means of said cabinet means being remotely located relative to said air 70 passageway. . ' 5. A water heater as in claim 4, characterized in that partition means is provided which forms an air compartment beneath said burner, air inlet means for such air compartment, means estab 75 3 líshing communication between said air compart ment and said burner compartment, said air in let means for said air compartment being insum cient to supply said burner with a proper amount of secondary air, whereby secondary air for said burner is also supplied through the air inlet means of said cabinet means. tion and a lower air compartment between said partition and said floor or other surface, a ñue communicating with said upper compartment for the flow therefrom of products of combustion, an air passageway at one side of said casing estab lishing communication between said upper and lower compartments for the flow of air from the cated a relatively'short distance above a ñoor or lower compartment to the upper compartment, and an air inlet opening for said lower compart ment remotely located relative to said air pas 10 other surface, a casing forming a substantially closed chamber between said reservoir and said floor or other'surface and enclosing said heating unit, a heat insulating partition beneath said unit and spaced from the ñoor or other surface and protected from the heating eñ'ects of said heat ing unit by said insulating partition and by the air flowing beneath said partition from the lower compartment to the air passageway and thence 15 6. In a water heater having a water reservoir and a water heating unit therebeneath and lo sageway, whereby the ñoor or other surface is dividing said chamber into an upper burner com into the upper compartment. partment between said reservoir and said parti ' ' CLARENCE H. MORROW.