GB2086555A - Compressor driven refrigerating appliance - Google Patents

Compressor driven refrigerating appliance Download PDF

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Publication number
GB2086555A
GB2086555A GB8131914A GB8131914A GB2086555A GB 2086555 A GB2086555 A GB 2086555A GB 8131914 A GB8131914 A GB 8131914A GB 8131914 A GB8131914 A GB 8131914A GB 2086555 A GB2086555 A GB 2086555A
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GB
United Kingdom
Prior art keywords
evaporator
conduit
valve
capillary
capillary pipe
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.)
Granted
Application number
GB8131914A
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GB2086555B (en
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
Publication of GB2086555A publication Critical patent/GB2086555A/en
Application granted granted Critical
Publication of GB2086555B publication Critical patent/GB2086555B/en
Expired 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel

Abstract

A refrigerating appliance has a compressor (10) with an evaporator (23) for a cooling chamber and an evaporator (17) for a freezing chamber, a capillary pipe (16) upstream of the evaporator (17) and a capillary pipe (22) and a magnetic valve (21) upstream of the evaporator (23). The two capillary pipes (16,22) are arranged in parallel and the valve (21) is upstream of the capillary pipe connection, and the conduit (11) from the condenser (12) has a branch point (14) from which conduits (15,20) extend to the two capillary pipes. The branch point (14) and the branch conduits (15,20) with the valve (21) below the branch point (14) in the downwardly extending conduit (20) are arranged in such a manner and the capillary pipe throttle (22) is so adjusted in relation to the other capillary pipe throttle (16) that a given quantity of refrigerant condensate is accumulated in the conduit (20) upstream the valve (21) when the compressor (10) is in operation and the valve (21) is open. <IMAGE>

Description

SPECIFICATION Compressor driven refrigerating appliance This invention relates to a compressor driven refrigerating appliance with a compressor having an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel and the valve being situated upstream of a connection of one capillary pipe to the other, and a conduit from the condenser having a branch point from which conduits extend to the two capillary pipes.
It is known to operate a refrigerating appliance with a cooling chamber and a freezing chamber by a refrigerating system having a single compressor.
However, experience has shown that so far it has not been possible to arrange such a system in a simple manner and to provide a simple control system so that the appliance will operate in the intended way under the widely different operating conditions which may occur. For instance a refrigerator has been proposed in which the two capillary pipes are arranged in parallel in the system and a magnetic valve is located upstream of only one of the capillary pipes. Further according to this proposal the evaporators also are arranged in parallel. This system operates satisfactorily under certain operating conditions, but not under all. To ensure safe operation of the system both capillary pipes must be supplied with refrigerant condensate in the event that the following evaporator needs cooling.In some cases however, it may happen that the evaporator in the refrigerating part is supplied with refrigerant vapour instead of refrigerant condensate so that there will be no cooling effect in the evaporator concerned.
An object of the present invention is to avoid or at least reduce this disadvantage.
According to this invention there is provided a refrigerating appliance having a compressor, an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel, and a conduit from the condenser having a branch point from which branch conduits extend to the two capillary pipes, wherein the branch point and the branch conduits with the valve below the branch point in one branch conduit, are arranged in such manner and capillary pipe throttle to the cooling chamber evaporator being so adjusted to the other capillary pipe throttle, that a given quantity of refrigerant condensate is accumulated in the branch conduit upstream of the valve when the compressor is in operation and the valve is open.
The invention will now be described by way of example with reference to the drawing, the single Figure of which is a diagram of a refrigerating circuit.
Referring to the drawing, a compressor system comprises a compressor 10 with a pressure conduit 11 containing a condenser 12 and a drier 13. The conduit 11 leads to a branch point 14 from which a conduit 15 extends to a capillary pipe 16 and an evaporator 17 for a freezing chamber. The freezing chamber evaporator 17 is connected by a conduit 18 to a suction conduit 19 leading back to the compressor 10. Another conduit 20 with a magnetic valve 21, a capillary pipe 22 and an evaporator 23 for a cooling chamber is connected in parallel to the conduit 15, the capillary 16 and the freezing chamber evaporator 17. A conduit 24 connects the cooling evaporator 23 to the suction conduit 19.
A part of the pressure conduit 11, connected to the branch point 14, extends downwardly towards that point, and the conduit 20 to the magnetic valve 21 is situated below the branch point 14whereasthe other conduit 15 connected to the branch point 14 is horizontal or extends upwardly from that point, at least at the place of connection. The capillary pipe 22 in the conduit to the cooling evaporator 23 is more throttled than the capillary pipe 16. When the system is in operation and the valve 21 is open, refrigerant condensate will be supplied to both evaporators 17 and 23. The capillary pipe throttle 22 is such that not all refrigerant from the compressor can pass through it. Instead part of the condensate is accumulated above the valve 21 in the conduit 20 at least up to the branch point 14.Hence both evaporators will be supplied with condensate and operate effectively when cooling is needed in the respective chamber of the refrigerated appliance, and it is possible to avoid periods during which there is a need for cooling of one chamber but the evaporator concerned is supplied solely with refrigerant vapour or a mixture of refrigerant vapour and refrigerant condensate which results in bad cooling.
1. A refrigerating appliance having a compressor, an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel, and a conduit from the condenser having a branch point from which branch conduits extend to the two capillary pipes, wherein the branch point and the branch conduits with the valve below the branch point in one branch conduit, are arranged in such manner and capillary pipe throttle to the cooling chamber evaporator being so adjusted to the other capillary pipe throttle, that a given quantity of refrigerant condensate is accumulated in the branch conduit upstream of the valve when the compressor is in operation and the valve is open.
2. An appliance according to claim 1 wherein the valve is a magnetic valve upstream of the capillary pipe connection.
3. An appliance according to claim 1 or claim 2 wherein at least part of the branch conduit to the freezing chamber evaporator is horizontal or directed above the horizontal plane of the branch point at that point.
4. An appliance according to any preceding
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Compressor driven refrigerating appliance This invention relates to a compressor driven refrigerating appliance with a compressor having an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel and the valve being situated upstream of a connection of one capillary pipe to the other, and a conduit from the condenser having a branch point from which conduits extend to the two capillary pipes. It is known to operate a refrigerating appliance with a cooling chamber and a freezing chamber by a refrigerating system having a single compressor. However, experience has shown that so far it has not been possible to arrange such a system in a simple manner and to provide a simple control system so that the appliance will operate in the intended way under the widely different operating conditions which may occur. For instance a refrigerator has been proposed in which the two capillary pipes are arranged in parallel in the system and a magnetic valve is located upstream of only one of the capillary pipes. Further according to this proposal the evaporators also are arranged in parallel. This system operates satisfactorily under certain operating conditions, but not under all. To ensure safe operation of the system both capillary pipes must be supplied with refrigerant condensate in the event that the following evaporator needs cooling.In some cases however, it may happen that the evaporator in the refrigerating part is supplied with refrigerant vapour instead of refrigerant condensate so that there will be no cooling effect in the evaporator concerned. An object of the present invention is to avoid or at least reduce this disadvantage. According to this invention there is provided a refrigerating appliance having a compressor, an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel, and a conduit from the condenser having a branch point from which branch conduits extend to the two capillary pipes, wherein the branch point and the branch conduits with the valve below the branch point in one branch conduit, are arranged in such manner and capillary pipe throttle to the cooling chamber evaporator being so adjusted to the other capillary pipe throttle, that a given quantity of refrigerant condensate is accumulated in the branch conduit upstream of the valve when the compressor is in operation and the valve is open. The invention will now be described by way of example with reference to the drawing, the single Figure of which is a diagram of a refrigerating circuit. Referring to the drawing, a compressor system comprises a compressor 10 with a pressure conduit 11 containing a condenser 12 and a drier 13. The conduit 11 leads to a branch point 14 from which a conduit 15 extends to a capillary pipe 16 and an evaporator 17 for a freezing chamber. The freezing chamber evaporator 17 is connected by a conduit 18 to a suction conduit 19 leading back to the compressor 10. Another conduit 20 with a magnetic valve 21, a capillary pipe 22 and an evaporator 23 for a cooling chamber is connected in parallel to the conduit 15, the capillary 16 and the freezing chamber evaporator 17. A conduit 24 connects the cooling evaporator 23 to the suction conduit 19. A part of the pressure conduit 11, connected to the branch point 14, extends downwardly towards that point, and the conduit 20 to the magnetic valve 21 is situated below the branch point 14whereasthe other conduit 15 connected to the branch point 14 is horizontal or extends upwardly from that point, at least at the place of connection. The capillary pipe 22 in the conduit to the cooling evaporator 23 is more throttled than the capillary pipe 16. When the system is in operation and the valve 21 is open, refrigerant condensate will be supplied to both evaporators 17 and 23. The capillary pipe throttle 22 is such that not all refrigerant from the compressor can pass through it. Instead part of the condensate is accumulated above the valve 21 in the conduit 20 at least up to the branch point 14.Hence both evaporators will be supplied with condensate and operate effectively when cooling is needed in the respective chamber of the refrigerated appliance, and it is possible to avoid periods during which there is a need for cooling of one chamber but the evaporator concerned is supplied solely with refrigerant vapour or a mixture of refrigerant vapour and refrigerant condensate which results in bad cooling. CLAIMS
1. A refrigerating appliance having a compressor, an evaporator for a cooling chamber and an evaporator for a freezing chamber, a capillary pipe upstream of the freezing chamber evaporator and a capillary pipe and a valve upstream of the cooling chamber evaporator, the two capillary pipes being arranged in parallel, and a conduit from the condenser having a branch point from which branch conduits extend to the two capillary pipes, wherein the branch point and the branch conduits with the valve below the branch point in one branch conduit, are arranged in such manner and capillary pipe throttle to the cooling chamber evaporator being so adjusted to the other capillary pipe throttle, that a given quantity of refrigerant condensate is accumulated in the branch conduit upstream of the valve when the compressor is in operation and the valve is open.
2. An appliance according to claim 1 wherein the valve is a magnetic valve upstream of the capillary pipe connection.
3. An appliance according to claim 1 or claim 2 wherein at least part of the branch conduit to the freezing chamber evaporator is horizontal or directed above the horizontal plane of the branch point at that point.
4. An appliance according to any preceding claim wherein the throttle in the branch conduit to the cooling chamber evaporator is such that condensate is accumulated upstream of the valve at least as far as the branch point.
5. An appliance according to any preceding claim wherein the capillary pipe to the cooling chamber evaporator is more throttled than the capillary pipe to the freezing chamber evaporator.
6. A refrigerating appliance constructed and arranged substantially as herein described and shown in the drawing.
GB8131914A 1980-10-30 1981-10-22 Compressor driven refrigerating appliance Expired GB2086555B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8007657A SE432663B (en) 1980-10-30 1980-10-30 COOLING SYSTEM WITH TWO EVAPORATORS FOR TWO TEMPERATURES

Publications (2)

Publication Number Publication Date
GB2086555A true GB2086555A (en) 1982-05-12
GB2086555B GB2086555B (en) 1984-03-21

Family

ID=20342127

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8131914A Expired GB2086555B (en) 1980-10-30 1981-10-22 Compressor driven refrigerating appliance

Country Status (4)

Country Link
DE (1) DE3142847C2 (en)
FR (1) FR2493491A1 (en)
GB (1) GB2086555B (en)
SE (1) SE432663B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405688A (en) * 2003-09-05 2005-03-09 Applied Design & Eng Ltd Refrigerator
WO2021233744A1 (en) * 2020-05-22 2021-11-25 BSH Hausgeräte GmbH Drying assembly and refrigeration device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1178089B (en) * 1984-01-20 1987-09-09 Merloni Elettrodomestici Spa REFRIGERANT REFRIGERANT SYSTEM WITH DIFFERENTIATED SYSTEM FOR FREEZER AND REFRIGERATOR
DE3700468A1 (en) * 1987-01-09 1988-08-11 Kurt Sorschak Sales vehicle for chilled goods

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2128020A (en) * 1934-12-14 1938-08-23 Gen Motors Corp Refrigerating apparatus
US2576663A (en) * 1948-12-29 1951-11-27 Gen Electric Two-temperature refrigerating system
DE1151261B (en) * 1957-07-01 1963-07-11 Electrolux Ab Device in a refrigerator to regulate the temperature of a cooling chamber independently of the temperatures in the other cooling chambers
DE1941495A1 (en) * 1968-09-27 1970-04-09 Hitachi Ltd Refrigeration device with simple and inexpensive tem - perature control mechanism
GB1314341A (en) * 1969-08-07 1973-04-18 Fisons Scient App Ltd Refrigeration system
CA1046784A (en) * 1975-11-28 1979-01-23 Bent Karll Compressor refrigeration plant
IT1192166B (en) * 1977-01-14 1988-03-31 Eurodomestici Ind Riunite REFRIGERANT CIRCUIT FOR A REFRIGERATOR WITH 2 COMPARTMENTS AT DIFFERENT OPERATING TEMPERATURES AS WELL AS REFRIGERATOR PROVIDED WITH SUCH CIRCUIT
DE2849286A1 (en) * 1978-11-14 1980-05-29 Bruno Kuemmerle Machine tool cooling system - has separate refrigeration vaporiser for lubricant, hydraulic oil and coolant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2405688A (en) * 2003-09-05 2005-03-09 Applied Design & Eng Ltd Refrigerator
WO2021233744A1 (en) * 2020-05-22 2021-11-25 BSH Hausgeräte GmbH Drying assembly and refrigeration device

Also Published As

Publication number Publication date
SE432663B (en) 1984-04-09
FR2493491A1 (en) 1982-05-07
DE3142847C2 (en) 1985-12-19
DE3142847A1 (en) 1982-05-19
SE8007657L (en) 1982-05-01
FR2493491B1 (en) 1984-10-26
GB2086555B (en) 1984-03-21

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PCNP Patent ceased through non-payment of renewal fee