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Cooling device

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as adjustment of the amount of refrigerant that cannot be circulated, pressure rise, etc.

Active Publication Date: 2014-02-19
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the amount of circulating refrigerant cannot be adjusted through the storage tank, and there is a problem that the pressure on the high-pressure side increases abnormally due to excess gas refrigerant in the refrigerant circuit.

Method used

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Embodiment Construction

[0095] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 It is a refrigerant circuit diagram of the refrigeration apparatus R which concerns on embodiment of this invention. The refrigerator R of this embodiment includes a refrigerator unit 3 and a plurality of showcase units 5A, 5B. The refrigerator unit 3 and each showcase unit 5A, 5B are connected by refrigerant pipes 7 and 9 to form a predetermined refrigeration cycle.

[0096] In this refrigerating cycle, carbon dioxide whose refrigerant pressure on the high pressure side (high pressure) is equal to or higher than its critical pressure (supercritical) is used as a refrigerant. This carbon dioxide refrigerant is a natural refrigerant that is beneficial to the global environment and considers flammability, toxicity, and the like. In addition, existing oils such as mineral oil (mineral oil), alkylbenzene oil, ether oil, ester oil, and PAG (polyalkylene glycol) are u...

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Abstract

The invention provides a cooling device, and thus in a cooling device with a critical pressure formed at a high-pressure side, the amount of a circulatory refrigerant in a refrigerant circuit can be properly maintained, and the overload operation of a compressing mechanism due to an abnormally high pressure can be prevented. The invention relates to a cooling device (R) with a supercritical pressure formed at the high-pressure side, and the device comprises: a refrigerant amount adjusting box (100) connected to the high-pressure side through a communicating circuit (101); a communicating circuit (103) communicating the upper part of the box and an intermediate-pressure region in the refrigerant circuit; a communicating circuit (105) communicating the lower part of the box and the intermediate-pressure region in the refrigerant circuit; an electric expansion valve (102) of the communicating circuit (101); a solenoid valve (104) of the communicating circuit (13); a solenoid valve (106) of the communicating circuit (105); and a control device (C) controlling the electric expansion valve (102) and various valve devices to recover the circulatory refrigerant in the refrigerant circuit into the box and to charge the refrigerant into the refrigerant circuit (1).

Description

technical field [0001] The invention relates to a refrigeration device in which a refrigerant circuit is formed by a compression mechanism, a gas cooler, a throttling mechanism and an evaporator, and the high-pressure side becomes a supercritical pressure. Background technique [0002] At present, in this kind of refrigeration device, a refrigeration cycle is composed of a compression mechanism, a gas cooler, and a throttling mechanism. , so as to use the evaporation of the refrigerant at this time to cool the surrounding air. In recent years, it has been impossible to use Freon-based refrigerants in such refrigerators due to natural environmental problems and the like. Therefore, a refrigeration device using carbon dioxide, which is a natural refrigerant, as a substitute for Freon refrigerant has been developed. It is known that this carbon dioxide refrigerant is a refrigerant with a large high-pressure difference, has a low critical pressure, and is compressed into a sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F25B1/10F25B49/02
CPCF25B49/02F25B2400/04F25B2400/075F25B2400/072F25B2600/25F25B41/20
Inventor 三原一彦佐佐木英孝长谷川说川久保贤大竹雅久
Owner SANYO ELECTRIC CO LTD
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