EP0350502B1 - Kühlschrank mit thermoelektrischem Element - Google Patents

Kühlschrank mit thermoelektrischem Element Download PDF

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Publication number
EP0350502B1
EP0350502B1 EP89900179A EP89900179A EP0350502B1 EP 0350502 B1 EP0350502 B1 EP 0350502B1 EP 89900179 A EP89900179 A EP 89900179A EP 89900179 A EP89900179 A EP 89900179A EP 0350502 B1 EP0350502 B1 EP 0350502B1
Authority
EP
European Patent Office
Prior art keywords
refrigerator
heat
peltier element
wall
blocks
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
EP89900179A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0350502A1 (de
Inventor
Virgil Künzle
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.)
CHEMONORM AG
Original Assignee
CHEMONORM AG
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 CHEMONORM AG filed Critical CHEMONORM AG
Priority to AT89900179T priority Critical patent/ATE83309T1/de
Publication of EP0350502A1 publication Critical patent/EP0350502A1/de
Application granted granted Critical
Publication of EP0350502B1 publication Critical patent/EP0350502B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
    • 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
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/021—Control thereof
    • F25B2321/0212—Control thereof of electric power, current or voltage
    • 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
    • F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
    • F25B2321/02—Details of machines, plants or systems, using electric or magnetic effects using Peltier effects; using Nernst-Ettinghausen effects
    • F25B2321/023—Mounting details thereof

Definitions

  • the present invention relates to a refrigerator, in particular a small refrigerator, with the features of the first part of claim 1.
  • a refrigerator is known from US-A-4301658.
  • EP-A-0 021 307 shows a cooling unit with a Peltier element and heat pipes.
  • the structure is already so complex that it is not possible to install it (even retrospectively) in any refrigerator wall (special recesses and fastenings required).
  • US-A-2 947 150 also shows a cooling unit with Peltier elements and heat pipes, which is particularly complex and also takes up a lot of space. An installation in any refrigerator is out of the question.
  • the object of the invention is to provide a refrigerator with a cooling unit which can be installed in a refrigerator back wall in the simplest way, also retrospectively and in a space-saving manner.
  • thermoelectric Peltier element is present as the cold source, which is on the one hand in heat-conducting connection with a first heat exchanger arranged in the interior of the refrigerator and on the other hand with a second heat exchanger arranged on an outer wall of the refrigerator, such that when electrical energy is supplied in the feed circuit of the Peltier element, heat is transferred from the first to the second heat exchanger.
  • An electrical circuit arrangement is provided for regulating the supply of electrical energy to the feed circuit of the Peltier element.
  • a refrigerator 10 has a rear wall 11 and two side walls 12 and 13 which project beyond the rear wall 11 to the rear.
  • the inner surfaces of the refrigerator 10 are covered with an insulating layer 14.
  • On this heat-conducting block 15 is by means of screws 17 on the Arranged rear of the refrigerator arranged metal block 18, with the interposition of a thermoelectric Peltier element 19 which is clamped by means of screws 17 between the two metal blocks 15 and 18.
  • the Peltier element 19 is a commercially available example that is supplied by the North American company Melcor under the type designation 1.4 / 127.06L.
  • a further metal block 20 is fastened by means of screws 21, so that the blocks 15 and 20 are in good heat-conducting connection.
  • the metal block 20 has a bore 22 in which an end portion of a so-called heat pipe 23 is seated, which is otherwise provided with a larger number of convection fins 24.
  • the heat pipe 23 consists, in a known manner, of an evacuated copper pipe which is closed at both ends and filled with saturated steam of high-purity water and on its cylindrical inner surfaces with a covering 25 acting as a wick (FIG. 2) is provided. Heat pipes of this type are also commercially available and are manufactured, for example, by Furukawa Electric Co. Ltd., Tokyo (Japan) and marketed under the type designation SB 100.
  • the metal block 20, the heat pipe 23 and the fins 24 together form a first heat exchanger, which is arranged in the interior of the refrigerator 10.
  • the already mentioned metal block 18 on the back of the refrigerator 10 has two parallel bores 26 and 27, in each of which an end part of a heat pipe 28 and 29 is seated. These two heat pipes 28 and 29 are of the same design as the previously described heat pipe 23 and are also each provided with a larger number of convection fins 30 and 31, respectively.
  • the metal block 10 and the heat pipes 20 and 29 with their fins 30 and 31 together form a second heat exchanger, which is located on the outside of the rear wall 11 of the refrigerator.
  • a housing 33 is fastened by means of screws 32 (FIG. 2), which contains an electrical circuit arrangement for automatically regulating the supply of electrical energy to the feed circuit of the Peltier element 19 already mentioned.
  • FIG. 3 the electrical circuit arrangement is shown schematically and generally designated 34.
  • the electrical circuit arrangement 34 has an electronic voltage comparator 35 with two inputs 36 and 37 and an output 38.
  • a constant reference voltage U1 is applied, which is generated by means of a bridge rectifier 39, smoothed by two capacitors 40, 41 and a resistor 42, stabilized to a constant value U0 by means of a voltage stabilizer 43 and by means of a voltage divider 44, 45 the desired value U 1 is reduced.
  • the bridge rectifier 39 has two connection terminals 46 and 47, which are to be connected to the AC network via a transformer, not shown.
  • a second voltage divider 48, 49 which reduces the stabilized voltage U0 to a variable value U2.
  • This second voltage divider consists of an adjustable fixed resistor 48 and a variable resistor 49, which has a pronounced negative temperature coefficient (NTC) and serves as a temperature sensor.
  • NTC negative temperature coefficient
  • the heat-conducting block 15 is provided with a bore 50 for receiving the variable resistor 49, which is connected to two connection terminals 51, 52 of the circuit arrangement 34.
  • a capacitor 53 is used to suppress short-term fluctuations in the variable voltage U2.
  • the output 38 of the voltage comparator 35 is via a Protective resistor 54 is connected to the control input 55 of an electronic FET switch 56, which is looped into the feed circuit of the Peltier element 19.
  • the circuit arrangement 34 has two terminals 57 and 58 for connecting the Peltier element 19. When the switch 56 is turned on, the Peltier element 19 is supplied directly with the unstabilized voltage from the bridge rectifier 39.
  • variable resistor 49 serving as a temperature sensor becomes smaller, which has a corresponding decrease in the variable voltage U2 at the negative input 37 of the voltage comparator 35. If the variable voltage U2 falls below the value of the reference voltage U1 at the control input 55 of the electronic switch 56 lying voltage U3 suddenly almost equal to zero. As a result, the switch 56 is controlled in its non-conductive or blocking state and thus the supply circuit of the Peltier element 19 is interrupted. The cooling unit is then in an inactive state, which is indicated visually by the LED 69 going out.
  • the cooling capacity of the cooling unit is in the range of 5 to 30 watts.
  • the adjustable resistor 48 it is possible to lower the temperature inside the refrigerator to about 2 ° C. if the outside temperature is in the range of the usual living room temperature.
  • the cooling unit described requires no maintenance and has an extremely long lifespan of the order of 150,000 hours or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Pyrane Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP89900179A 1988-01-05 1988-12-27 Kühlschrank mit thermoelektrischem Element Expired - Lifetime EP0350502B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89900179T ATE83309T1 (de) 1988-01-05 1988-12-27 Kuehlschrank mit thermoelektrischem element.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH23/88 1988-01-05
CH23/88A CH675154A5 (pt) 1988-01-05 1988-01-05

Publications (2)

Publication Number Publication Date
EP0350502A1 EP0350502A1 (de) 1990-01-17
EP0350502B1 true EP0350502B1 (de) 1992-12-09

Family

ID=4177625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89900179A Expired - Lifetime EP0350502B1 (de) 1988-01-05 1988-12-27 Kühlschrank mit thermoelektrischem Element

Country Status (11)

Country Link
EP (1) EP0350502B1 (pt)
JP (1) JPH02502846A (pt)
AT (1) ATE83309T1 (pt)
AU (1) AU627705B2 (pt)
BR (1) BR8807399A (pt)
CH (1) CH675154A5 (pt)
DE (1) DE3876621D1 (pt)
DK (1) DK437089D0 (pt)
FI (1) FI894038A0 (pt)
NO (1) NO170743C (pt)
WO (1) WO1989006335A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028364A1 (en) * 1993-05-25 1994-12-08 Industrial Research Limited A peltier device
US5737923A (en) * 1995-10-17 1998-04-14 Marlow Industries, Inc. Thermoelectric device with evaporating/condensing heat exchanger

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2998702A (en) * 1953-07-14 1961-09-05 Jr Everett J Hardgrave Ramjet diffuser
GB798882A (en) * 1955-08-12 1958-07-30 Gen Electric Co Ltd Improvements in or relating to thermoelectric cooling units
US2947150A (en) * 1958-02-21 1960-08-02 Whirlpool Co Refrigerating apparatus having improved heat transferring means
US2998707A (en) * 1960-03-22 1961-09-05 Westinghouse Electric Corp Control apparatus and method for heat pumps
US3100969A (en) * 1960-08-03 1963-08-20 Thore M Elfving Thermoelectric refrigeration
DE1174338B (de) * 1960-09-20 1964-07-23 Siemens Elektrogeraete Gmbh Aus mehreren Peltierelementen zusammen-gesetzter Block
US3123980A (en) * 1960-12-23 1964-03-10 figure
FR2226627A1 (en) * 1973-04-18 1974-11-15 Electricite De France Peltier effect heat pump - has hot and cold faces coupled by heat exchangers protruding into chambers
HU170629B (pt) * 1974-01-25 1977-07-28
FR2407447A1 (fr) * 1977-10-26 1979-05-25 Lutard Francois Association pompe a chaleur-caloduc
FR2459556A1 (fr) * 1979-06-19 1981-01-09 Moracchioli R Procede et dispositif pour le transfert de chaleur entre au moins deux sources de chaleur de maniere a les maintenir a des niveaux thermiques differents
FR2468086A1 (fr) * 1979-10-18 1981-04-30 Moracchioli R Dispositif, panneau et procede destines au chauffage, a la refrigeration, a la climatisation ou au controle de l'humidite d'un habitat industriel ou commercial
US4301658A (en) * 1979-12-11 1981-11-24 Koolatron Industries, Ltd. Control circuitry for thermoelectric cooler
US4274262A (en) * 1980-03-21 1981-06-23 Koolatron Industries, Limited Thermoelectric jug cooler and control circuit
US4364234A (en) * 1981-03-25 1982-12-21 Koolatron Industries, Ltd. Control circuitry for thermoelectric environmental chamber

Also Published As

Publication number Publication date
AU2797689A (en) 1989-08-01
ATE83309T1 (de) 1992-12-15
EP0350502A1 (de) 1990-01-17
DK437089A (da) 1989-09-04
JPH02502846A (ja) 1990-09-06
NO893534L (no) 1989-09-04
NO170743B (no) 1992-08-17
AU627705B2 (en) 1992-09-03
FI894038A (fi) 1989-08-29
WO1989006335A1 (en) 1989-07-13
CH675154A5 (pt) 1990-08-31
DE3876621D1 (de) 1993-01-21
NO893534D0 (no) 1989-09-04
DK437089D0 (da) 1989-09-04
BR8807399A (pt) 1990-05-08
NO170743C (no) 1992-11-25
FI894038A0 (fi) 1989-08-29

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