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Refrigerator

A technology for refrigerators and freezers, applied in the field of refrigerators, can solve the problems of inability to simply form a cooling cycle, large heat leakage of gaskets, and increased power consumption.

Inactive Publication Date: 2009-12-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Yet, because above-mentioned existing structure is the indirect cooling mode that stirs refrigerating room 1 and refrigerating room 2 with cooling fan 7 and cooling fan 9 respectively, so on the one hand the temperature distribution in the box is good food cooling speed is fast, and on the other hand Heat leakage from gasket etc. is also large
In addition, air-conditioning passages, defrosting circuits, etc. are required, so the cooling cycle cannot be easily configured.
[0006] Therefore, although a refrigerator with less heat leakage and a direct-cooling evaporator that can easily form a cooling cycle by natural convection has been proposed in the refrigerator, in actual use, the refrigerator does not operate according to the preset program. situation, so there is a problem of cooling the freezer more than necessary and increasing power consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0030] figure 1 It is a cross-sectional view of the refrigerator of the first embodiment of the present invention. The refrigerating chamber 21 and the freezing chamber 22 are formed in upper and lower partitions. A heat insulating material 25 is filled between the cabinet 23 and the inner box 24 forming the refrigerator compartment 21 . Refrigerating room evaporator 26 is arranged at the innermost side of refrigerating room 21 . A freezer evaporator 27 and a freezer cooling fan 28 that circulates air in the freezer 22 through the freezer evaporator 27 are arranged at the innermost side of the freezer 22 .

[0031] For example, refrigerator compartment temperature sensor 29 and freezer compartment temperature sensor 30 , which are thermistors, detect the temperatures of refrigerator compartment 21 and freezer compartment 22 , respectively. The control circuit 33 controls the compressor 31 , the channel switching valve 32 , and the cooling fan 28 . The compressor 31 and th...

no. 2 example

[0043] Figure 4 is a time chart of the second embodiment of the present invention. The description of the same operation as that of the first embodiment is omitted, and only the control of the rotation speed of the compressor will be described.

[0044] In a stable cycle in which cooling starts from the refrigerating room and freezing room circuit and ends cooling in the freezing room circuit, by setting the rotational speed of the compressor 31 (hereinafter referred to as R) during the refrigerating room and freezing room circuit 2 ) than the speed of the compressor 31 in the freezer circuit (hereinafter referred to as R 1 ) is low, which can reduce the input of the compressor which accounts for most of the power consumption, and by adopting a higher rotation speed than that of the refrigerator and freezer circuits when the freezer circuit needs to be cooled, the operating time of the freezer circuit can be suppressed, Therefore, power saving can be achieved.

[0045] In ...

no. 3 example

[0047] Figure 5 is a time chart of the third embodiment of the present invention. The description of the same operation as that of the first embodiment is omitted, and only the control of the rotation speed of the cooling fan will be described.

[0048] In a stable cycle in which cooling starts from the refrigerator and freezer circuits and ends cooling in the freezer circuit, by changing the rotation speed of the freezer cooling fan 28 during the time T1 when the cooling of the freezer circuit starts, for example, when the The rotation speed of the cooling fan 28 during the freezer circuit is set to R 3 , by making it ratio R 3 R at low revs 5 Rotate, when the cooling of the freezer circuit starts, heat exchange is performed in the state where the evaporation temperature of the evaporator 27 for the freezer is high and the heat exchange efficiency is poor, and the input of the cooling fan 28 is reduced, thereby improving the efficiency of the freezer. The cooling efficie...

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PUM

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Abstract

The invention relates to power saving of refrigerators. Refrigerating chamber (21) is cooled with direct cooling mode, and freezing chamber (22) is cooled with intercooling mode. The flow path switching valve (32) switches the flow path of the refrigerant to the one that simultaneously cools the refrigerating chamber (21) and the freezing chamber (22) in series according to the signals from the refrigerating chamber temperature sensor (29) and the freezing chamber temperature sensor (30). A refrigerator and freezer circuit, or a freezer circuit that cools only the freezer (22). By making the difference between the cooling-on temperature at which cooling of the refrigerating compartment (21) begins and the cooling-off temperature at which cooling is completed smaller than the difference between the cooling-on temperature at which cooling of the freezing compartment (22) begins and the cooling-off temperature at which cooling is completed, The refrigerator can be operated in a stable cycle in which cooling is started from the refrigerator compartment and the freezer compartment circuit and cooling is completed by the freezer compartment circuit.

Description

technical field [0001] The present invention relates to power saving of a refrigerator in which simultaneous cooling of a refrigerator compartment and a freezer compartment and cooling of a freezer compartment are alternately performed, and the refrigerator compartment is cooled by direct cooling and the freezer compartment is cooled by indirect cooling. Background technique [0002] Existing medium-sized and large freezer-refrigerators have an evaporator for cooling the refrigerating room and a fan for cooling the refrigerating room, and an evaporator for cooling the refrigerating room and a fan for cooling the refrigerating room. Both the compartment and the freezer are cooled by indirect cooling. [0003] Figure 7 It is the existing refrigerator described in Japanese Patent Application Publication No. Special Table No. Ping 10-503277. The refrigerating chamber 1 and the freezing chamber 2 are formed in upper and lower partitions. A heat insulating material 5 is filled ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25D11/02F25D17/06F25B1/00F25B5/00F25D29/00
CPCF25B5/00F25D29/00F25D2700/12F25B2400/0409F25D2400/04F25B2600/2511F25D2700/122F25B2600/0251
Inventor 中西和也
Owner PANASONIC CORP