Cooling device

A refrigeration device and refrigerant technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of pressure rise, unable to adjust the amount of circulating refrigerant, etc.

Active Publication Date: 2011-06-29
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 accompanying drawings. figure 1 It is a refrigerant circuit diagram of the refrigeration apparatus R which concerns on embodiment of this invention. The refrigeration apparatus R of the present embodiment includes a refrigerator unit 3 and a plurality of showcase units 5A and 5B, and the refrigerator unit 3 and the showcase units 5A and 5B are connected by refrigerant pipes 7 and 9 to form a predetermined refrigeration cycle.

[0096] In this refrigeration cycle, carbon dioxide whose refrigerant pressure on the high-pressure side (high-pressure 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 takes flammability, toxicity, and the like into consideration. In addition, existing oils, such as mineral oil (mineral oil), alkylbenz...

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PUM

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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 present invention relates to a refrigeration apparatus in which a refrigerant circuit is constituted by a compression mechanism, a gas cooler, a throttle mechanism, and an evaporator, and the high-pressure side becomes supercritical pressure. Background technique [0002] At present, in this type of refrigeration device, a refrigeration cycle is formed by a compression mechanism, a gas cooler, and a throttling mechanism. The refrigerant compressed by the compression mechanism dissipates heat through the gas cooler, decompresses through the throttling mechanism, and then evaporates through the evaporator. , so as to use the evaporation of the refrigerant at this time to cool the surrounding air. In recent years, in such refrigeration apparatuses, Freon-based refrigerants cannot be used due to environmental problems and the like. Therefore, refrigeration apparatuses using carbon dioxide, which is a natural refrigerant, as a substitute for Freon refr...

Claims

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Application Information

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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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