EP0238015A2 - Réfrigérateur-congélateur combiné avec un service de dégivrage automatique - Google Patents
Réfrigérateur-congélateur combiné avec un service de dégivrage automatique Download PDFInfo
- Publication number
- EP0238015A2 EP0238015A2 EP87103772A EP87103772A EP0238015A2 EP 0238015 A2 EP0238015 A2 EP 0238015A2 EP 87103772 A EP87103772 A EP 87103772A EP 87103772 A EP87103772 A EP 87103772A EP 0238015 A2 EP0238015 A2 EP 0238015A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- refrigerator
- compartment
- freezer
- thermostat
- 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.)
- Withdrawn
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/008—Defroster control by timer
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- 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
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
-
- 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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
-
- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/04—Refrigerators with a horizontal mullion
-
- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/30—Quick freezing
-
- 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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
Definitions
- the present invention relates to refrigerating apparatus comprising a compartment in which a temperature of about +5 °C is to be maintained for the preservation of fresh foods, and a compartment in which a temperature of at least -18 °C is to be maintained for freezing foods and keeping them in the frozen state.
- Apparatus of this type usually referred to as "two temperatures refrigerating apparatus or fridge-freeze combinations", are conventionally provided with a wall panel evaporator in each of the two compartments, and the defrosting operation takes place in an automatic manner during each operating cycle alone with respect to the evaporator of the refrigerator compartment, while the evaporator of the freezer compartment has to be defrosted manually during an interruption of the operation of the refrigerant circuit.
- the defrosting of the evaporator in the refrigerator compartment is carried out as described above, while the defrosting of the evaporator in the freezer compartment takes place with the aid of electric resistance heaters associated to the evaporator and adapted to be periodically energized with altering the operating conditions of the freezer compartment.
- the resistance heaters are energized at preselected intervals of for instance 24 hours, and for a period depending on the amount of rime formed on the evaporator and determined by a program control unit on the base of the temperature sensed by a thermostatic sensor connected to the evaporator.
- the refrigerant circuit may be devided so as to include two separate compressors with associated controls for cooling the refrigerator compartment and the freezer compartment independently of one another.
- the refrigerant circuit may comprise a single compressor for alternately supplying the refrigerant fluid to the evaporator of the refrigerator compartment and to that of the freezer compartment by means of a solenoid switch valve.
- Both these solutions require the installation of a thermostat in the refrigerator compartment, and another thermostat in the freezer compartment for controlling the operation of the compressor and for selecting the evaporator to be supplied with the refrigerant.
- the known solutions are thus rather complicated as regards the construction of the refrigerant circuit, requiring an increased number of electromechanical components for its operation and control.
- a main object of the invention is to provide a refrigerator-freezer combination of simple construction and reliable operation, with cyclic defrosting by natural air circulation in the refrigerator compartment, and with timed automatic defrosting of the freezer compartment by forced air circulation.
- a refrigerator-freezer combination with automatic defrosting function comprising a housing incorporating at least two completely separate compartments, namely, a refrigerator compartment provided with a wall panel evaporator, and a freezer compartment provided with a finned battery evaporator and an associated fan, said evaporators being included in a refrigerant circuit supplied by a single compressor under the control of thermostat means, wherein the evaporator of said refrigerator compartment is disposed in said refrigerant circuit upstream of the evaporator of said freezer compartment, said means for controlling said compressor comprisign a single thermostat disposed in said refrigerator compartment and connected to at least one detector means fixed to said evaporator of said refrigerator compartment.
- a refrigerator-freezer combination comprises a housing 10 the interior of which is divided into two completely separate compartments, namely, an upper compartment 11 for the preservation of fresh foods, and a lower compartment 12 acting as a freezer compartment for the storage of frozen foods (fig.1).
- the temperature is usually maintained at about +5 °C, while the temperature in the freezer compartment 12 is maintained at least at -18 °C.
- a refrigerant circuit includes, sequentially in the direction of refrigerant flow, a compressor 15 disposed in the base of housing 10, a condenser 16 secured to the ouer rear wall surface of housing 10, a dehydrating filter 17, a capillary 18, an evaporator 19 secured to a wall of refrigerator compartment 11, and a finned battery evaporator 20 with an associated fan 21 mounted within freezer compartment 12.
- evaporator 19 is of the "hidden" type comprising a steel pipe coil secured to a panel likewise of steel and adhered to the interior wall surface of refrigerator compartment 11 so as to be incorporated in the insulating lining of housing 10.
- evaporator 19 is connected in the refrigerant circuit upstream of evaporator 20.
- a capillary 22 is connected in series between evaporator 19 and evaporator 20 so as to establish a correct balan ce of the refrigerating potential in the refrigerator compartment 11 and freezer compartment 12.
- the proposed solution permits different evaporating temperatures to be simultaneously obtained in the two evaporators, thus reducing the danger of the temperature in the refrigerator compartment dropping to below 0 °C during a period in which the freezer compartment requires the maximum refrigerating capacity. This situation arises for example in the case of a freezing operation, during which the compressor operates continuously for a certain period.
- capillary 22 upstream of evaporator 20 also facilitates the installation of the latter in the freezer compartment.
- capillary 22 is formed in an extensible coil configuration permitting it to be extracted from the compartment for soldering it to finned evaporator 20 of the freezer compartment exterior of the housing. Subsequently the capillary is again coiled and inserted into a suitable open cavity formed in the wall of the freezer compartment as the evaporator 20 is installed therein.
- the main characteristic of the invention provides for the employ of only a single thermostat 23 disposed in refrigerator compartment 11 and connected to a detector 24 fixed to evaporator 19 of this compartment for controlling both compressor 15 and fan 21 of evaporator 20.
- compressor 15 and fan 21 are connected in parallel with one another and in series between thermostat 23 and a contact of a program timer 25 acting to determine the defrosting periods of freezer evaporator 20.
- Program timer 25 is connected to a thermostat detecting the temperature of evaporator 20, and controls the energization of a defrosting heater element 26 of evaporator 20.
- the thus constructed refrigerator-freezer combination in fact permits to eliminate any control on the user's part of the defrosting operation, which is carried out in an automatic manner in both compartments.
- This construction also ensures optimum preservation of foods both in the refrigerator compartment, in which the natural air circulation reduces the dehydration of fresh foods, and in the freezer compartment, in which a forced air circulation and a rapid freezing effect are obtainable when so required. This is because the fan is energized during operation of the compressor.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4571286 | 1986-03-21 | ||
| IT45712/86A IT1192070B (it) | 1986-03-21 | 1986-03-21 | Frigorifero congelatore con sbrinamento automatico |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0238015A2 true EP0238015A2 (fr) | 1987-09-23 |
| EP0238015A3 EP0238015A3 (fr) | 1988-05-18 |
Family
ID=11257533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87103772A Withdrawn EP0238015A3 (fr) | 1986-03-21 | 1987-03-16 | Réfrigérateur-congélateur combiné avec un service de dégivrage automatique |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0238015A3 (fr) |
| IT (1) | IT1192070B (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9513046B2 (en) | 2013-07-15 | 2016-12-06 | Luis Carlos Gabino Barrera Ramirez | Hot liquid wash defrosting methods and systems |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1035671B (de) * | 1955-10-06 | 1958-08-07 | Gen Motors Corp | Kuehlschrank |
| US3822564A (en) * | 1972-08-01 | 1974-07-09 | Naniwa Sangyo Co Ltd | Combination type refrigerator |
| GB2017889B (en) * | 1978-03-29 | 1982-07-14 | Tokyo Shibaura Electric Co | Refrigerating apparatus |
| US4358933A (en) * | 1981-01-19 | 1982-11-16 | General Electric Company | Household refrigerator defrost system |
| GB2123180B (en) * | 1982-06-30 | 1986-01-22 | Tokyo Shibaura Electric Co | Control device for a refrigerator |
| JPS5966678A (ja) * | 1982-10-08 | 1984-04-16 | 株式会社日立製作所 | 冷蔵庫 |
-
1986
- 1986-03-21 IT IT45712/86A patent/IT1192070B/it active
-
1987
- 1987-03-16 EP EP87103772A patent/EP0238015A3/fr not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9513046B2 (en) | 2013-07-15 | 2016-12-06 | Luis Carlos Gabino Barrera Ramirez | Hot liquid wash defrosting methods and systems |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8645712A0 (it) | 1986-03-21 |
| EP0238015A3 (fr) | 1988-05-18 |
| IT1192070B (it) | 1988-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT CH DE ES FR GB IT LI SE |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: INDUSTRIE ZANUSSI S.P.A. |
|
| PUAL | Search report despatched |
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| AK | Designated contracting states |
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| 17P | Request for examination filed |
Effective date: 19880802 |
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| 17Q | First examination report despatched |
Effective date: 19890920 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19910227 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PERUZZO, ROBERTO Inventor name: MAREGA, PAOLO Inventor name: BESSON, DUILIO Inventor name: PATRON, OSCAR |