US2095017A - Water heater - Google Patents

Water heater Download PDF

Info

Publication number
US2095017A
US2095017A US36406A US3640635A US2095017A US 2095017 A US2095017 A US 2095017A US 36406 A US36406 A US 36406A US 3640635 A US3640635 A US 3640635A US 2095017 A US2095017 A US 2095017A
Authority
US
United States
Prior art keywords
compartment
tank
water
coil
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US36406A
Inventor
Wilkes Gilbert
Frank M Reed
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US36406A priority Critical patent/US2095017A/en
Application granted granted Critical
Publication of US2095017A publication Critical patent/US2095017A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00Fluid heaters characterised by the use of heat pumps
    • F24H4/02Water heaters
    • F24H4/04Storage heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system

Definitions

  • a further object of the invention is the provision of an arrangement such that water supplies of difierent temperatures may be made available.
  • Another object of the invention is the provision of means whereby, during periods of excessive demand, the heat pump may be supplemented by an electrical heating unit.
  • Fig. 1 is a vertical sectional view through a water heater constructed in accordance with our invention
  • Fig. 2 is a view partially in section and at 1ight angles to the view f Fig. 1;
  • Fig. 3 is a section on 1ine 3-3 of Fig. 2;
  • Fig. 4 is a section online 44 of Fig. 2;
  • Fig. 5 is a diagrammatic view showing the electrical controls and connections.
  • Fig. 6 is a perspective view showing the water heater casing.
  • the numeral III designates a suitable base from which, through standards II, a tank base I2 is supported.
  • This tank base supports the main tank wall I3 and an outer cover II spaced from the main tank wall, the space between the main tank Wall and the outer cover being filled with suitable insulation not herein disclosed.
  • the tank adjacent its upper end, has a. horizontal partition I5 dividing the interior of the tank into upper and lower chambers IG and IT. Outlets are providecl from the upper portions of compartments I6 and I'I as indicated at I8 and I9 respectively, and an inlet 20 is provided for the lower end of compartment I'l.
  • a motor compressor unit 2I Loca.ted in the space between the tank bottom I2 and the base III is a motor compressor unit 2I together with an evaporator unit 22.
  • the outlet from the compressor enters the compartment I6, forms a, conclenser super-heat zone coil 23 in this compartment and is then 1ed downwardly through the partition I5 to a point adjacent the lower end of compartment I'I where the saturated zone coil 24 of the condenser is formed.
  • thermostao 26 controls the operation of the motor compressor unit and is preferably located at a point adjacent the lower end of compartment IT where it Will be rapidly afiected by incoming cold water.
  • Compartment I6 is provided with an electrical heating unit 21 controlled by a thermostat 28, which thermostat is preferably arranged in a circuit 29 including a manually controlled switch.
  • compartment I6 a supp1y of water at relatively high heat, say 135 to 160 degrees, while in the upper end of compartment I'I a, temperature of approximately 135 degrees will be attained.
  • the use of the nozzle 25 insures ability to draw oft the major portion of fr1e hotter water without comingling with the replenishing liquid received from Compartment I'I, for the nozzle causes rotative motion of the incoming liquid and of the entire mass within compartment; I6 accentuating by centrifugal force the segregation resulting normally from the difierence in specific weights of the cooler and. hotter liquids, and causes the hotter liquid to rise to the domed top at the center for passage through the centrally disposecl outlet I8.
  • the thermostat sets the motor compressor unit in operation and since the coil 23 in compartment I6 forms a super-heat zone and is located well toward the periphery of compartment I6 where it will immediately contact with the incoming water from oompartment I'I, the incoming water is rapidly and highly heated.
  • the nozzle is so directed that the flow of the liquid is in counter-flow relation 120 the super-heat coil; that is Co say, it passes from the outlei; toward the inlet of the super-heat coil so that a maximum efficiency With heat exchange is provided.
  • F01 emergency use the switch 30 may be closed so that the electric heater may supplement the action of the heat pump.
  • the heat pump is likewise utilized in room cooling, the base structure being providecl With a grille, louvers or the like indicated a.t g and positioned 190 permit escape of the air drawn through the evaporator unit 22 by the unit fan f.
  • a. tun ha.ving upper und lower compartments separated by a. partitlon, mea.ns to heat the contents 013 the lower compartment, additional means to hea.t the contents o1.
  • the upper compartment to a h1gher temperature, means to transler water from the lower to the upper compartment causing the wa.ter to rota.te in the upper oompartment, an lnlet for the lower end of the lower compartment, and a centrally dlsposed outlet in the upper end of the upper compartment.
  • a. tank having upper and lower compartments separated by a partltion, means to hea.t the contents of the lower compartment, additional means to heat the contents of the upper compartment to a higher temperature, means 00 transfer w'ater from the lower to the upper compartment causlng the water to rotate in the upper compartment, a n inlet for the lower end o1. the lower oompartment, a centrally disposed outlet In the upper end o1 the upper compartment, und an outlet for the upper end of the lower compartment.
  • a. Compartment havlng a. coil paralleling the wall thereof, a. domed top 10x the compartment havlng an outlet substantially axial to the coil, means to circulate a heating medium through sald coil a.nd means to intraduce flid to sa.1d compartment constructed and arranged 120 cause the entering fluld to rota.te in the compartment in a directlon .opposlte to the dlrection of flow of heatlng medium In the coil. 6.
  • a. water heater of the type described a.
  • a device as claimed in cla.lm 6 whereln the tank base is engaged by a jacketlng means trapplng heated a.ir rising from the motor Comp1fess- Ing unit and bringing this a1r into heat transfer relation to the lower end 015 the tank.
  • a Single water-storage tank a partltlon divldlng the ta.nk into a small upper und a, large lower compartment, the upper compartment ha.vlng a domed upper wall provided centrally with an outhat, a heat pump including a condenser coil having superheat and saturate zones.
  • the superheat zone being disposed withln und extending circumferentlally cf the upper compartment und the satura.te zone being dlsposed wlthin the lower compartment, means to transfer fluld from the upper end of the lower to the upper compartment and a thermostatlcally controlled direct heater disposed in the upper compartment adjacent the outlet thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Description

G. WILKES Er AI.
um: HEATER Filed Aug. 15, 1935 ?ai:enteci (kt. 5, 1937 UNITED STATES PATENT OFFICE Gilbert Wilkes, Jacksonwald, and Frank M. Reed,
' Clem-field, Pa.
Application August 15, 1935, Serial N0. 36,406
8* Claims. (GI. 122-26) 'I'his invention re1ates to domestic water beaters and has for an important object thereof the provision of a water heater operated by a heat p p- An important object of the invention is the provision of an arrangement such that a maximum heating efficiency may be derived from the pump.
A further object of the invention is the provision of an arrangement such that water supplies of difierent temperatures may be made available.
Another object of the invention is the provision of means whereby, during periods of excessive demand, the heat pump may be supplemented by an electrical heating unit.
These and other objects we attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration, we have shown a preferred embodiment of our invention and wherein:
Fig. 1 is a vertical sectional view through a water heater constructed in accordance with our invention;
Fig. 2 is a view partially in section and at 1ight angles to the view f Fig. 1;
Fig. 3 is a section on 1ine 3-3 of Fig. 2;
Fig. 4 is a section online 44 of Fig. 2;
Fig. 5 is a diagrammatic view showing the electrical controls and connections; and
Fig. 6 is a perspective view showing the water heater casing.
Referring now more particularly to the drawings, the numeral III designates a suitable base from which, through standards II, a tank base I2 is supported. This tank base, in turn, supports the main tank wall I3 and an outer cover II spaced from the main tank wall, the space between the main tank Wall and the outer cover being filled with suitable insulation not herein disclosed. The tank, adjacent its upper end, has a. horizontal partition I5 dividing the interior of the tank into upper and lower chambers IG and IT. Outlets are providecl from the upper portions of compartments I6 and I'I as indicated at I8 and I9 respectively, and an inlet 20 is provided for the lower end of compartment I'l.
Loca.ted in the space between the tank bottom I2 and the base III is a motor compressor unit 2I together with an evaporator unit 22. The outlet from the compressor enters the compartment I6, forms a, conclenser super-heat zone coil 23 in this compartment and is then 1ed downwardly through the partition I5 to a point adjacent the lower end of compartment I'I where the saturated zone coil 24 of the condenser is formed.
From this coi1 the usual connection is made to the inlet of evapora'cor 22. Transfer of liquid from compartment; I1 to compartment IG is accomplished through the nozzle 25 which is circumferentially directed in compartment I6. A thermostao 26 controls the operation of the motor compressor unit and is preferably located at a point adjacent the lower end of compartment IT where it Will be rapidly afiected by incoming cold water. Compartment I6 is provided with an electrical heating unit 21 controlled by a thermostat 28, which thermostat is preferably arranged in a circuit 29 including a manually controlled switch.
Through Segregation of the liquid in the upper part oi the tank, it is possible to maintain in the;
compartment I6 a supp1y of water at relatively high heat, say 135 to 160 degrees, while in the upper end of compartment I'I a, temperature of approximately 135 degrees will be attained. The use of the nozzle 25 insures ability to draw oft the major portion of fr1e hotter water without comingling with the replenishing liquid received from Compartment I'I, for the nozzle causes rotative motion of the incoming liquid and of the entire mass within compartment; I6 accentuating by centrifugal force the segregation resulting normally from the difierence in specific weights of the cooler and. hotter liquids, and causes the hotter liquid to rise to the domed top at the center for passage through the centrally disposecl outlet I8. As fresh water enters compartment I'I, the thermostat sets the motor compressor unit in operation and since the coil 23 in compartment I6 forms a super-heat zone and is located well toward the periphery of compartment I6 where it will immediately contact with the incoming water from oompartment I'I, the incoming water is rapidly and highly heated. The nozzle is so directed that the flow of the liquid is in counter-flow relation 120 the super-heat coil; that is Co say, it passes from the outlei; toward the inlet of the super-heat coil so that a maximum efficiency With heat exchange is provided. F01 emergency use the switch 30 may be closed so that the electric heater may supplement the action of the heat pump.
In addition to its function as a Water heating unit, the heat pump is likewise utilized in room cooling, the base structure being providecl With a grille, louvers or the like indicated a.t g and positioned 190 permit escape of the air drawn through the evaporator unit 22 by the unit fan f.
The arrangement illustrated being obviously capable of considerable modification without depaxtdng from the splrlt 012 our invention, we do not wish to be understood as llmiting ourselves thereto except as herelnafter cla.lmed.
We claim:
1. In a wa.ter heater, a. tun]: ha.ving upper und lower compartments separated by a. partitlon, mea.ns to heat the contents 013 the lower compartment, additional means to hea.t the contents o1. the upper compartment to a h1gher temperature, means to transler water from the lower to the upper compartment causing the wa.ter to rota.te in the upper oompartment, an lnlet for the lower end of the lower compartment, and a centrally dlsposed outlet in the upper end of the upper compartment.
2. In a. water hez'ater, a. tank having upper and lower compartments separated by a partltion, means to hea.t the contents of the lower compartment, additional means to heat the contents of the upper compartment to a higher temperature, means 00 transfer w'ater from the lower to the upper compartment causlng the water to rotate in the upper compartment, a n inlet for the lower end o1. the lower oompartment, a centrally disposed outlet In the upper end o1 the upper compartment, und an outlet for the upper end of the lower compartment.
8. In a, watet bester o! the type describ'ed, a tank ha.ving upper und lower compartments, an lnletnt the lower end 01 the lower compartment, an outlet for the upper end of the upper compartment, means to transfer fluid Irom the upper end cf the lower oompartment to the upper compartment and a heat pump includlng a. condenser comprlalng a. coil loca.ted in sald upper compartment, a eoll'located in the lower end 01' v the lower compartment und means to circulate a refrigerant to be condensed through said con- 4. "fixe structure o! cla.lm 1 whereln the heut- Ing means of the upper compartment comprlses a coil parallel ing the ta.nk wall a.nd through whlch a heating medlum ls clrculated und the dlrectlon of rotatlon of transferred water in the upper compartment ls counter to the dlrectlon of movement of the heatlng medlum in the coil.
5. In a. fluid heater, a. Compartment havlng a. coil paralleling the wall thereof, a. domed top 10x the compartment havlng an outlet substantially axial to the coil, means to circulate a heating medium through sald coil a.nd means to intraduce flid to sa.1d compartment constructed and arranged 120 cause the entering fluld to rota.te in the compartment in a directlon .opposlte to the dlrection of flow of heatlng medium In the coil. 6. In a. water heater of the type described, a
self-contalned un1t comprlsing a. base, a. tank,
means to support the tank in spaced relation 110 the base, a heat pump comprlsing a. motor compressor unit; und an evaporator located between the tank and base, anal a. condenser dlsposed within the tank, and an air clrculatlng me9.ns pass- 1ng alr over sa.id compressor unit a.nd to sadd evaporator. w
7. A device as claimed in cla.lm 6 whereln the tank base is engaged by a jacketlng means trapplng heated a.ir rising from the motor Comp1fess- Ing unit and bringing this a1r into heat transfer relation to the lower end 015 the tank.
8. In a. ';'vater hea.ter of the type described, a Single water-storage tank, a partltlon divldlng the ta.nk into a small upper und a, large lower compartment, the upper compartment ha.vlng a domed upper wall provided centrally with an outhat, a heat pump including a condenser coil having superheat and saturate zones. the superheat zone being disposed withln und extending circumferentlally cf the upper compartment und the satura.te zone being dlsposed wlthin the lower compartment, means to transfer fluld from the upper end of the lower to the upper compartment and a thermostatlcally controlled direct heater disposed in the upper compartment adjacent the outlet thereof.
GIL'BERT WILKES.
FRANK M.REED.
US36406A 1935-08-15 1935-08-15 Water heater Expired - Lifetime US2095017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US36406A US2095017A (en) 1935-08-15 1935-08-15 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36406A US2095017A (en) 1935-08-15 1935-08-15 Water heater

Publications (1)

Publication Number Publication Date
US2095017A true US2095017A (en) 1937-10-05

Family

ID=21888445

Family Applications (1)

Application Number Title Priority Date Filing Date
US36406A Expired - Lifetime US2095017A (en) 1935-08-15 1935-08-15 Water heater

Country Status (1)

Country Link
US (1) US2095017A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516093A (en) * 1949-05-05 1950-07-18 V C Patterson & Associates Inc Heat pump water heater and method of heat exchange
US2516094A (en) * 1949-05-17 1950-07-18 V C Patterson & Associates Inc Heat pump water heater
US2526032A (en) * 1948-10-11 1950-10-17 Francis L La Porte Defrosting method and apparatus for refrigeration systems
US2529781A (en) * 1947-01-27 1950-11-14 Sunroc Refrigeration Company Water cooler having adjustable drinking water temperature and water bleed
US2538023A (en) * 1944-09-26 1951-01-16 Specialties Dev Corp Carbon dioxide storage
US2625929A (en) * 1949-10-29 1953-01-20 Herbert W Love Friction heat generator
US2668420A (en) * 1951-03-20 1954-02-09 Gen Electric Combination water heating and room cooling system and method employing heat pumps
US2700279A (en) * 1952-06-12 1955-01-25 Gen Motors Corp Refrigerating apparatus and water heater
US2716866A (en) * 1955-09-06 Water heating systems of the heat
US3017162A (en) * 1958-01-17 1962-01-16 Gen Electric Heating and cooling apparatus
US3986664A (en) * 1974-04-18 1976-10-19 Projectus Industriprodukter Ab Heating installation comprising a heat pump and a fuel-fired boiler with a radiator circuit
DE2851511A1 (en) * 1978-11-29 1980-06-12 Stiebel Eltron Gmbh & Co Kg Heat pump heating system - has condensers at different heights in hot water reservoir each with associated thermostat controlling compressor operation
EP0049503A2 (en) * 1980-10-04 1982-04-14 IWS-Vertriebsgesellschaft mbH Hot-water heating plant with heat pump and heat buffer
EP0075048A1 (en) * 1980-02-14 1983-03-30 HALL & KAY ENGINEERING LIMITED Heat recovery
US4474018A (en) * 1982-05-06 1984-10-02 Arthur D. Little, Inc. Heat pump system for production of domestic hot water
US4517807A (en) * 1982-09-10 1985-05-21 Borg-Warner Corporation Heat pump water heater with supplemental heat supply
US4543468A (en) * 1982-12-16 1985-09-24 Borg-Warner Corporation Control system for water heater with external heat source
DE3822396A1 (en) * 1988-07-01 1990-01-18 Karlfried Cost Heat pump installation with a variable temperature lift
US20070039341A1 (en) * 2005-08-17 2007-02-22 Bradford White Corporation Heat pump water heater
CN102062473A (en) * 2010-06-24 2011-05-18 艾欧史密斯(中国)热水器有限公司 Composite heat exchange water storage type heat pump water heater
US20130220237A1 (en) * 2012-02-24 2013-08-29 Stevan Dobi Method and Apparatus for Heating a Stored Liquid
DE102009014682B4 (en) 2009-03-27 2017-03-30 Joachim Kötter Heat pump for a water heater
USD978305S1 (en) * 2021-04-28 2023-02-14 Stiebel Eltron Gmbh & Co. Kg Heat pump
US11614228B2 (en) * 2016-04-13 2023-03-28 Commissariat A L'energie Atomique Et Aux Energies Alternatives Device for converting a liquid to a vapour

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2716866A (en) * 1955-09-06 Water heating systems of the heat
US2538023A (en) * 1944-09-26 1951-01-16 Specialties Dev Corp Carbon dioxide storage
US2529781A (en) * 1947-01-27 1950-11-14 Sunroc Refrigeration Company Water cooler having adjustable drinking water temperature and water bleed
US2526032A (en) * 1948-10-11 1950-10-17 Francis L La Porte Defrosting method and apparatus for refrigeration systems
US2516093A (en) * 1949-05-05 1950-07-18 V C Patterson & Associates Inc Heat pump water heater and method of heat exchange
US2516094A (en) * 1949-05-17 1950-07-18 V C Patterson & Associates Inc Heat pump water heater
US2625929A (en) * 1949-10-29 1953-01-20 Herbert W Love Friction heat generator
US2668420A (en) * 1951-03-20 1954-02-09 Gen Electric Combination water heating and room cooling system and method employing heat pumps
US2700279A (en) * 1952-06-12 1955-01-25 Gen Motors Corp Refrigerating apparatus and water heater
US3017162A (en) * 1958-01-17 1962-01-16 Gen Electric Heating and cooling apparatus
US3986664A (en) * 1974-04-18 1976-10-19 Projectus Industriprodukter Ab Heating installation comprising a heat pump and a fuel-fired boiler with a radiator circuit
DE2851511A1 (en) * 1978-11-29 1980-06-12 Stiebel Eltron Gmbh & Co Kg Heat pump heating system - has condensers at different heights in hot water reservoir each with associated thermostat controlling compressor operation
EP0075048A1 (en) * 1980-02-14 1983-03-30 HALL & KAY ENGINEERING LIMITED Heat recovery
EP0049503A3 (en) * 1980-10-04 1982-05-26 Karl Kolb & Sohn Hot-water heating plant with heat pump and heat buffer
EP0049503A2 (en) * 1980-10-04 1982-04-14 IWS-Vertriebsgesellschaft mbH Hot-water heating plant with heat pump and heat buffer
US4474018A (en) * 1982-05-06 1984-10-02 Arthur D. Little, Inc. Heat pump system for production of domestic hot water
US4517807A (en) * 1982-09-10 1985-05-21 Borg-Warner Corporation Heat pump water heater with supplemental heat supply
US4543468A (en) * 1982-12-16 1985-09-24 Borg-Warner Corporation Control system for water heater with external heat source
DE3822396A1 (en) * 1988-07-01 1990-01-18 Karlfried Cost Heat pump installation with a variable temperature lift
US20080104986A1 (en) * 2005-08-17 2008-05-08 Bradford White Corporation Heat pump water heater
US7334419B2 (en) * 2005-08-17 2008-02-26 Bradford White Corporation Heat pump water heater
US20070039341A1 (en) * 2005-08-17 2007-02-22 Bradford White Corporation Heat pump water heater
US7866168B2 (en) * 2005-08-17 2011-01-11 Bradford White Corporation Heat pump water heater
DE102009014682B4 (en) 2009-03-27 2017-03-30 Joachim Kötter Heat pump for a water heater
CN102062473A (en) * 2010-06-24 2011-05-18 艾欧史密斯(中国)热水器有限公司 Composite heat exchange water storage type heat pump water heater
WO2011163490A3 (en) * 2010-06-24 2012-11-08 A.O. Smith Corporation A storage heat pump water heater with composite heat exchanger
US20130220237A1 (en) * 2012-02-24 2013-08-29 Stevan Dobi Method and Apparatus for Heating a Stored Liquid
US9702583B2 (en) * 2012-02-24 2017-07-11 Pityu Controls Inc. Method and apparatus for heating a stored liquid
US11614228B2 (en) * 2016-04-13 2023-03-28 Commissariat A L'energie Atomique Et Aux Energies Alternatives Device for converting a liquid to a vapour
USD978305S1 (en) * 2021-04-28 2023-02-14 Stiebel Eltron Gmbh & Co. Kg Heat pump

Similar Documents

Publication Publication Date Title
US2095017A (en) Water heater
US3828575A (en) Compact heating and cooling system
US2516094A (en) Heat pump water heater
US2716866A (en) Water heating systems of the heat
US2003496A (en) Heat storage device
CA1312798C (en) Integrated apparatus for producing warm water
US5881573A (en) Refrigerating device with cooling unit working intermittently
US4103509A (en) Water heater-dehumidifier combination heat pump
US2822136A (en) Combined hot air furnace and domestic water heater
US3309503A (en) Electric sauna bath heater
US2337653A (en) Refrigeration
US2703969A (en) Refrigerating evaporator
US3213934A (en) Cooling system for liquids used in machine tools and similar appliances
US2001531A (en) Heating apparatus
US2819044A (en) Air-conditioning apparatus
US3240262A (en) Gas and liquid contact heat exchanger
US2153932A (en) Air conditioning apparatus
US1993288A (en) Heating and cooling system
US2184095A (en) Heating and air conditioning apparatus
US2833267A (en) Combination water heater and space heater
US1763328A (en) Electric radiator
US3750421A (en) Horizontal firing of generator in absorption refrigerator
US2415076A (en) Individual room air conditioner
US2349396A (en) Refrigeration
US3073257A (en) Heat actuated pumps