US3295334A - Heat operated refrigerator operable on gas or electricity and control mechanism therefor - Google Patents

Heat operated refrigerator operable on gas or electricity and control mechanism therefor Download PDF

Info

Publication number
US3295334A
US3295334A US424278A US42427865A US3295334A US 3295334 A US3295334 A US 3295334A US 424278 A US424278 A US 424278A US 42427865 A US42427865 A US 42427865A US 3295334 A US3295334 A US 3295334A
Authority
US
United States
Prior art keywords
gas
switch
valve
heat
electrical
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
US424278A
Other languages
English (en)
Inventor
Hultgren Nils Lennart
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Priority to US424278A priority Critical patent/US3295334A/en
Priority to CH1813665A priority patent/CH453397A/de
Priority to GB59/66A priority patent/GB1128941A/en
Priority to DE19661476965 priority patent/DE1476965A1/de
Application granted granted Critical
Publication of US3295334A publication Critical patent/US3295334A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/027—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures of the sorption cycle type

Definitions

  • My invention relates to heat operated refrigerators of the type alternatively employing gas and electricity as power sources and in which cooling is effected by a refrigeration unit having a heat receiving part.
  • An object of my invention is to provide a heat operated refrigerator of this type having an improved control mechanism which is of simplified construction and requires a minimum number of parts for alternatively employing gas and electricity as power sources and prevents the refrigerator from being connected to either one of the power sources when the control mechanism is functioning to connect the refrigerator to the other of the power sources.
  • I accomplish this by respectively providing in the electrical and gas supply lines an electrical switch and a gas valve having independent manually operable control members movable in paths of movement which interfere with one another in such manner that, when the switch is closed, the manually operable control member therefor physically blocks and prevents movement of the manually operable gas valve control member from its valve closed to its valve open position; and, when the gas valve is open, the manually operable control member therefor physically blocks and prevents movement of the manually operable electric switch control member from its switch open to its switch closed position.
  • Another object of my invention is to provide a heat operated refrigerator of this type having an improved control mechanism of simplified construction which can be readily assembled with inexpensive electrical switches and gas valves of conventional design.
  • FIG. 1 is a vertical sectional view of a mobile home refrigerator provided with heating equipment embodying my invention
  • FIG. 2 illustrates more or less diagrammatically heat operated refrigeration apparatus suitable for use in the refrigerator shown in FIG. 1;
  • FIG. 3 is a diagrammatic representation of circuits for controlling the heating of the heat receiving part of the refrigeration apparatus shown in FIGS. 1 and 2;
  • FIGS. 4 and 5 are side vertical views, partly in section, of parts shown in FIG. 3, movable control parts being illustrated in different positions in the two figures;
  • FIG. 6 is a fragmentary sectional View taken at line 6--6 of FIG. 5;
  • FIGS. 7 and 8 are front elevational views taken at lines 7-7 and 88, respectively, of FIGS. 4 and 5;
  • FIG. 9 is a top plan view, partly in section, of parts like those in FIGS. 4 to 8, illustrating a modification of my invention.
  • FIG. 10 is a vertical view taken at line 1010 of FIG. 9.
  • a mobile home refrigerator 10 comprising a cabinet 11 having thermally insulated walls 12 defining a storage compartment 14 into which access may be gained by a door 15 hinged to the front of the cabinet.
  • a cooling element or evaporator 16 of suitable heat operated refrigeration apparatus.
  • the heat operated refrigeration apparatus may be of a uniform pressure absorption type which is well known in the art.
  • the cooling element 16 is connected to other parts, including a generator 17, which are mounted on the cabinet 11 and positioned in the vertically extending space 18 at the rear of the cabinet.
  • refrigerant vapor is expelled from absorption liquid in a vapor lift pipe 19 of the generator 17, as shown in FIG. 2.
  • the expelled refrigerant vapor passes through a conduit 20 to a condenser 21.
  • the refrigerant vapor is liquified in the condenser 21 and flows into the evaporator 16 in which the refrigerant evaporates and diffuses into an inert gas to produce a refrigerating effect.
  • the resulting gas mixture of refrigerant and inert gas flows from the evaporator 16 to an absorber 22 which may be of an air-cooled type including a coil 23 and an absorber vessel 24 to which the lower end of the coil is connected, such gas mixture entering theabsorber vessel 24 through a heat exchanger 25 and a conduit 26.
  • an absorber 22 which may be of an air-cooled type including a coil 23 and an absorber vessel 24 to which the lower end of the coil is connected, such gas mixture entering theabsorber vessel 24 through a heat exchanger 25 and a conduit 26.
  • the absorber 22 refrigerant is absorbed from the gas mixture into absorption liquid which is delivered thereto through a conduit 27, and the absorption liquid enriched in refrigerant passes into the absorber vessel 24.
  • the inert gas is returned from the absorber 22 to the evaporator 16 in a path of flow including a conduit 28 and heat exchanger 25, and the enriched absorption liquid is conducted through a conduit 29 and inner pipe 30 of a liquid heat exchanger 31 to the generator 17.
  • a vent conduit 34 connects the lower end of the condenser 21 and the passage of the heat exchanger 25 through which the gas mixture flows from the evaporator 16.
  • Absorption solution enriched in refrigerant flows from the absorber vessel 24 through the liquid heat exchange-r 31 into the lower end of vapor lift pipe 19 which is in thermal exchange relation at 36 with a heating tube 35.
  • the heating tube 35 is arranged to be heated by an electrical heating element 37 disposed within the tube. Vapor generated in the vapor lift pipe 19 by heating effected by the heating tube 35 raises liquid therein by vapor lift action and flows from the upper end thereof through the upper part of standpipe 32 into conduit 20 and passes to the condenser 21, as previously explained.
  • the generator 17 in its entirety, together with a major portion of the liquid heat exchanger 31, are embedded in a body of insulation 38 retained in a metal shell or casing 39 having an opening 40 at the bottom thereof.
  • the heating tube 35 is embedded in a part of the insulation 38 which is intermediate the ends thereof and spaced from the top and bottom ends of the shell 39. Electrical conductors 41 and 42 for the electrical heating element 37 pass through the bottom opening 40 of the shell 39 and extend through the insulation 38.
  • the heating tube 35 snugly receives the heating element 37 which may comprise a cartridge housing an electrical wire or the like having a relatively high resistance that generates heat when connectedto a source of electrical energy. It is usually the practice to provide a passage in the body of insulation 38 which extends to the exterior of the insulating body, so that the electrical heating element 37 may be readily inserted into and removed from the heating tube 35.
  • the generator 17 is arranged to be operated at will by two independent sources of heat, each of which alone is capable of supplying heat at an adequate rate and at a sufficiently elevated temperature to the vapor lift pipe 19 to effect normal operation of the refrigeration apparatus under all conditions under which the apparatus is intended to be operated.
  • This is accomplished by providing a second heating flue 43 which is in thermal exchange relation at 44 with the vapor lift pipe 19.
  • a fluid fuel burner 45 is arranged to be supported in an upright position within the bottom part 43a of the heating flue, so that the combustion gases will be used most effectively for heating the heating flue 43.
  • the burner 45 is connected to a source of supply of gaseous fuel by a pipe 46.
  • the generator 17 constitutes the heat receiving part of the refrigeration apparatus.
  • the lower end 43a of the heating flue 43 projects through an opening in the bottom of the shell 39 into the rear part of a space 18a below the storage compartment 14.
  • the space 18a is accessible through an opening 18b at the front of the cabinet 11 adapted to be closed by a removable closure member or hinged door (not shown).
  • the heating flue 43 is provided with a riser or flue extension 43b which extends upwardly in the rear apparatus space 18 and is mounted in position in any suitable manner.
  • the upper end of the riser 43b may be flush with an apertured member 11a so that natural circulation of air may take place in the rear apparatus space 18 to promote cooling of parts, such as the condenser 21 and absorber 23, of the refrigeration apparatus.
  • the electrical conductors 41 and 42 are connected to a suitable source of electrical supply.
  • the burner 45 is connected to a source of supply of the fuel and ignited.
  • the generator 17 is subjected to excessive heating which tends to shorten the life of the refrigeration apparatus. It is therefore desirable to protect the refrigeration apparatus so that, when the apparatus is connected to one of the sources of heat, the apparatus cannot be connected to the other source of heat.
  • FIG. 3 Such a protective arrangement is diagrammatically shown in FIG. 3 in which the electrical heating element 37 is connected to a source S of electrical energy by the conductors 41 and 42, a switch 47 being connected in the conductor 42.
  • the burner 45 is connected to a source S of gaseous fuel by the conduit 46 in which is connected a manually operable valve 48.
  • the pipe 46 is also provided with a valve 49 having a thermal member 50 associated therewith which functions to keep valve 49 open when a flame is being maintained at the burner 45 and to close valve 49 when the burner flame is extinguished.
  • the burner 45 is provided with a lighter tube 51 into which gaseous fuel is diverted from the supply conduit 46.
  • the outer free end of the lighter tube 51 terminates at a discharge orifice 52 for maintaining a pilot flame at the vicinity of the thermal member 50.
  • a valve 53 which is spring biased to its closed position and can be opened by manipulating a push button 54.
  • valve 48 may be opened and the push button 54 then pressed to open valve 53, whereby gaseous fuel can flow through the lighter tube 51 and the fuel discharged from the orifice 52 can be ignited to provide a pilot flame which functions to heat the thermal member 50.
  • the latter When the latter is heated sufficiently it in turn functions to open valve 49 and supply fuel to the burner 45 which is ignited by the pilot flame, whereupon the push button 54 may be released to close valve 53 and shut off the pilot flame.
  • the heating equipment just described embodies means whereby, when either the electrical heater 37 or the gaseous fuel burner 45 is connected to supply heat to the generator 17, the other cannot be rendered operable to supply heat to the refrigeration unit.
  • the electric switch 47 and gas valve 48 are respectively mounted at 55 and 56 to a bracket 57 which may be mounted in any suitable manner (not shown) in the forward part of the space 18a of the cabinet 11.
  • the switch 47 is provided with a housing 47a and may be of a conventional type referred to as a toggle switch having an independent manually movable operating member or part 58 which snaps vertically between an upper off position and a lower on position, as illustrated in FIGS. 7 and 8.
  • the gas valve 48 may be of a conventional type having an independent manually movable operating member or arm 59 connected to a rotatable plug 59a having a passage 59b therethrough.
  • the operating member 59 formsa unitary part of the rotatable element of the gas valve 48 and is manually movable between a vertical valve closed position shown in FIGS. 5 and 8 and a horizontal valve open position shown in FIGS. 4 and 7.
  • the independent switch operating member 58 is manually movable in a vertical path of movement between its upper open or off position shown in FIGS. 4 and 7 and its lower closed or on position shown in FIGS. 5 and 8; and that the independent gas valve operating member 59 is manually movable in an angluar path of movement between its downwardly-depending valve closed position shown in FIGS. 5 and 8 and its horizontal valve open position shown in FIGS. 4 and 7.
  • the independent manually movable operating members 58 and 59 are movable in paths of movement which interfere with one another in such manner that the switch operating member 58 in its down or lower switch closed position will physically block movement of the gas valve operating member 59 from its vertical valve closed position toward its horizontal valve open position, and the gas valve operating member 59 in its horizontal valve open position will physically block downward movement of the switch operating member 58 from its upper switch open position toward its lower switch closed position.
  • I accomplish this by fixing to the gas valve operating member 59 at 590 a plate 60 which is of the shape shown in FIGS. 7 and 8. As best shown in FIGS.
  • the plate 60 includes a first portion which is L-shaped in section and has a long arm 60a thereof forming a quadrant of a circle with a curved peripheral edge 6012 extending through an angle of
  • the short arm 600 of the L-shaped first portion of the plate 60 is essentially parallel to the gas valve operating arm 59 and in endto-end relation therewith, as best shown in FIGS. 7 and 8.
  • the plate 60 includes a second portion 60d which constitutes an extension of the short arm 600 of the L-shapedfirst portion.
  • the second portion 60d of the plate 60 is joined to the operating arm 59 and is coextensive therewith in the direction of its length.
  • the extension 60d of the plate 60 functions as a component or part of the independently movable gas valve operating member 59, as best shown in FIG. 5.
  • the refrigerator 10 is connected to the source of supply S of gaseous fuel and the gas valve operating arm 59 is in its horizontal valve open position illustrated in FIGS. 4 and 7; and that the independent switch operating member 58 is in its upper or switch open or off position shown in FIGS. 4 and 7. Under these conditions, the plate 60 is in the path of movement of the switch operating member 58 and physically blocks and prevents downward movement of the independent switch operating member in the manner shown in FIGS. 4 and 7.
  • Each of the operating members 58 and 59 which are independently movable about axes perpendicular to one another, are movable with respect to the other. Therefore, the independent operating members 58 and 59 can be manually moved to their switch open and valve closed positions at the same time to disconnect the refrigerator 10 from both the sources of supply of electricity and gaseous fuel.
  • the switch operating member 58 in itSl switch on or closed position interferes with the move ment of the plate 60 ata zone 60a at one end of the quadrant 60a.
  • the plate 60 at a zone 60a" at the opposite end of the quadrant 60a interferes with the movement of the switch operating member 58.
  • FIGS. 9 and 10 I have shown another embodiment of my invention in which parts similar to those illustrated in FIGS. 4 to 8 are referred to by the same reference numerals to which 100 has been added.
  • the electric switch 147 within the housing 147a is fixed at 155 to the horizontal arm 157a of an L-shaped bracket 157.
  • the switch 147 is connected in a conductor 142 corresponding to the conductor 42 in FIG. 3.
  • the switch 147 is of the snap-acting type and provided with an independent operating member 158 manually movable back and forth between the solid and dotted line positions illustrated in FIG. 10.
  • the gas valve 148 is fixed at 156 to the vertical arm 15719 of the L-shaped bracket 157.
  • the gas valve 148 is provided with an apertured turnable plug similar to the plug 59a in FIG. 6 and connected in a pipe 146 COI'I'B-l sponding to the pipe 46 in FIG. 3.
  • the independent gas valve operating member 159 is manually movable between the solid and dotted line positions illustrated in FIG. 9.
  • the switch operating arm 158 in dotted lines in FIG. 10 is in front of the gas valve operating arm 159 and in the path of movement of the gas valve operating arm and physically blocks and prevents movement of the arm 159 in a counterclockwise direction in FIG. 9.
  • the refrigerator 10 is connected to the source of supply of gaseous fuel and the gas valve operating arm 159 is in the horizontal dotted line position in FIG. 9 which designates the gas valve open position; and that the switch operating arm 158 is in its solid line position in FIG. 10 which designates the switch Under these conditions, the gas valve operating arm 159 in dotted lines in FIG. 9 is in back of the switch operating arm 158 and in the path of movement of the switch operating arm and physically blocks and prevents rearward movement of the operating arm 158 to its dotted line position in FIG. 10 and prevents the arm 158 from moving to its switch closed or on position.
  • said second part of said valve includes a plate having a curved peripheral edge which functions to physically block and prevent movement of said first part when said valve is in its open position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US424278A 1965-01-08 1965-01-08 Heat operated refrigerator operable on gas or electricity and control mechanism therefor Expired - Lifetime US3295334A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US424278A US3295334A (en) 1965-01-08 1965-01-08 Heat operated refrigerator operable on gas or electricity and control mechanism therefor
CH1813665A CH453397A (de) 1965-01-08 1965-12-31 Absorptionskälteapparat
GB59/66A GB1128941A (en) 1965-01-08 1966-01-03 Improvements in absorption refrigerating apparatus
DE19661476965 DE1476965A1 (de) 1965-01-08 1966-01-07 Anordnung bei mit Hilfsgas arbeitenden Absorptionskaelteapparaten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US424278A US3295334A (en) 1965-01-08 1965-01-08 Heat operated refrigerator operable on gas or electricity and control mechanism therefor

Publications (1)

Publication Number Publication Date
US3295334A true US3295334A (en) 1967-01-03

Family

ID=23682095

Family Applications (1)

Application Number Title Priority Date Filing Date
US424278A Expired - Lifetime US3295334A (en) 1965-01-08 1965-01-08 Heat operated refrigerator operable on gas or electricity and control mechanism therefor

Country Status (4)

Country Link
US (1) US3295334A (de)
CH (1) CH453397A (de)
DE (1) DE1476965A1 (de)
GB (1) GB1128941A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370436A (en) * 1966-12-12 1968-02-27 Ram Domestic Products Company Combined gas and electric control system for refrigerator appliances
US3505827A (en) * 1968-08-27 1970-04-14 Carrier Corp Refrigeration system having generator fuel supply control means
US3810249A (en) * 1971-03-05 1974-05-07 United Gas Industries Ltd Gas/electric control mechanism
US4016730A (en) * 1974-02-03 1977-04-12 Devilliers Paul Hendrik Refrigerators
US4111004A (en) * 1974-11-01 1978-09-05 Aktiebolaget Electrolux Gas operated refrigerator having a sealed combustion system with separated fresh air and combustion gas conduits
US4242879A (en) * 1978-06-19 1981-01-06 Aktiebolaget Electrolux Control system for a refrigerating apparatus operable electrically or by gas
US4257758A (en) * 1977-09-08 1981-03-24 Aktiebolaget Electrolux Safety arrangement in a gas operated apparatus
FR2501394A1 (fr) * 1981-03-06 1982-09-10 Applic Gaz Sa Systeme de commande de l'alimentation en energie d'un appareil a gaz et a electricite
US4362029A (en) * 1980-04-15 1982-12-07 Aktiebolaget Electrolux Absorption refrigerator boiler construction
US5692393A (en) * 1995-06-07 1997-12-02 Gas Research Institute Internally fired generator
US5791158A (en) * 1995-06-07 1998-08-11 Gas Research Institute Internally fired generator with improved solution flow
ES2162540A1 (es) * 1998-10-14 2001-12-16 Bsh Fabricacion Sa Sistema de mando unico para horno de cocina.
US20040109680A1 (en) * 2002-12-06 2004-06-10 Rinnai Corporation Hybrid hotair heater
US20050036770A1 (en) * 2002-10-02 2005-02-17 Rinnai Corporation Hybrid hot air heater
US20140190456A1 (en) * 2011-08-25 2014-07-10 Inergy Automotive Systems Research (Societe Anonyme) Method for handling fuel vapors onboard a hybrid vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080729A (en) * 1960-01-30 1963-03-12 Electrolux Ab Absorption refrigeration
US3105363A (en) * 1961-10-02 1963-10-01 Norcold Inc Gas-electric refrigerating system
US3177677A (en) * 1960-01-12 1965-04-13 Electrolux Ab Absorption refrigeration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177677A (en) * 1960-01-12 1965-04-13 Electrolux Ab Absorption refrigeration
US3080729A (en) * 1960-01-30 1963-03-12 Electrolux Ab Absorption refrigeration
US3105363A (en) * 1961-10-02 1963-10-01 Norcold Inc Gas-electric refrigerating system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370436A (en) * 1966-12-12 1968-02-27 Ram Domestic Products Company Combined gas and electric control system for refrigerator appliances
US3505827A (en) * 1968-08-27 1970-04-14 Carrier Corp Refrigeration system having generator fuel supply control means
US3810249A (en) * 1971-03-05 1974-05-07 United Gas Industries Ltd Gas/electric control mechanism
US4016730A (en) * 1974-02-03 1977-04-12 Devilliers Paul Hendrik Refrigerators
US4111004A (en) * 1974-11-01 1978-09-05 Aktiebolaget Electrolux Gas operated refrigerator having a sealed combustion system with separated fresh air and combustion gas conduits
US4257758A (en) * 1977-09-08 1981-03-24 Aktiebolaget Electrolux Safety arrangement in a gas operated apparatus
US4242879A (en) * 1978-06-19 1981-01-06 Aktiebolaget Electrolux Control system for a refrigerating apparatus operable electrically or by gas
US4362029A (en) * 1980-04-15 1982-12-07 Aktiebolaget Electrolux Absorption refrigerator boiler construction
WO1982003117A1 (en) * 1981-03-06 1982-09-16 Applic Gaz Sa Control system for the power supply of a gas and electricity apparatus
FR2501394A1 (fr) * 1981-03-06 1982-09-10 Applic Gaz Sa Systeme de commande de l'alimentation en energie d'un appareil a gaz et a electricite
US5692393A (en) * 1995-06-07 1997-12-02 Gas Research Institute Internally fired generator
US5791158A (en) * 1995-06-07 1998-08-11 Gas Research Institute Internally fired generator with improved solution flow
ES2162540A1 (es) * 1998-10-14 2001-12-16 Bsh Fabricacion Sa Sistema de mando unico para horno de cocina.
US20050036770A1 (en) * 2002-10-02 2005-02-17 Rinnai Corporation Hybrid hot air heater
US6882796B2 (en) * 2002-10-02 2005-04-19 Rinnai Corporation Hybrid hot air heater
US20040109680A1 (en) * 2002-12-06 2004-06-10 Rinnai Corporation Hybrid hotair heater
US6795643B2 (en) * 2002-12-06 2004-09-21 Rinnai Corporation Hybrid hotair heater
US20140190456A1 (en) * 2011-08-25 2014-07-10 Inergy Automotive Systems Research (Societe Anonyme) Method for handling fuel vapors onboard a hybrid vehicle

Also Published As

Publication number Publication date
CH453397A (de) 1968-06-14
DE1476965A1 (de) 1969-10-23
GB1128941A (en) 1968-10-02

Similar Documents

Publication Publication Date Title
US3295334A (en) Heat operated refrigerator operable on gas or electricity and control mechanism therefor
US4698487A (en) Process and apparatus for the heat treatment of meals
EP0774614B1 (de) Vorrichtung und Verfahren zur Verdampfung einer kryogenen Flüssigkeit und Überhitzung des erzeugten Dampfes
US4257758A (en) Safety arrangement in a gas operated apparatus
US3676042A (en) Heater ignition system
US3194227A (en) Control system for ovens
US3253421A (en) Absorption refrigeration
US3177677A (en) Absorption refrigeration
US1995846A (en) Automatic gas appliance
US4914919A (en) Arrangement for preventing freezing of the working medium in an absorption refrigerating apparatus
US4278862A (en) Combination microwave and gas oven
US3284610A (en) Heat operated refrigerator operable on gas or electricity
US3596651A (en) Self-cleaning gas-fired oven
US2040174A (en) Air-cooled refrigerator
US2446636A (en) Refrigeration
US2623511A (en) Heating means for internal-combustion engines
US3093978A (en) Absorption refrigeration apparatus
US2195264A (en) Liquid fuel burner
US2340414A (en) Refrigeration
JP2004278895A (ja) 調理器
US2095813A (en) Gas buhner control
US2337870A (en) Refrigeration
US3220462A (en) Means for igniting a gaseous fuel burner
US2597779A (en) Refrigerating apparatus
JPS6034911Y2 (ja) 給湯暖房装置