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Cooling apparatus

A cooling device and cooled technology, which is applied in the direction of household refrigeration devices, coolers, refrigerators, etc., can solve the problems of high-pressure side pressure rise and equipment damage, etc., and achieve the effect of long and shortened holding time

Active Publication Date: 2005-02-02
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the compressor starts, because the state in the refrigerant circuit is unstable, the pressure on the high-pressure side is more likely to rise, and the pressure on the high-pressure side may rise abnormally, exceeding the design pressure of the equipment. In the worst case, there may be damage to the equipment. risk of injury

Method used

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  • Cooling apparatus
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Embodiment Construction

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a refrigerant circuit diagram of a cooling device 110 applicable to the present invention. The cooling device 110 is composed of a condensing unit 100 and a refrigerator main body 105 serving as a cooling equipment main body. The cooling device 110 of the embodiment is, for example, a display case installed in a store. Therefore, the refrigerator main body 105 is a main body composed of a heat insulating wall of the display case.

[0017] The condensing unit 100 is composed of a compressor 10, a gas cooler (condenser) 40, and a capillary tube 58 as a decompression unit. The cooler 40 and the capillary tube 58 together with the evaporator 92 constitute a predetermined refrigerant circuit.

[0018] That is, the refrigerant discharge pipe 24 of the compressor 10 is connected to the inlet of the gas cooler 40 . Here, the compressor 10 of the embodiment ...

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PUM

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Abstract

There is provided a cooling apparatus which can prevent an abnormal increase in pressure of a high side at the time of starting. The cooling apparatus comprises: a refrigerant circuit which uses carbon dioxide as a refrigerant; and a control device which controls a speed of rotation for the compressor between predetermined lowest and highest speeds. The control device runs the compressor by holding a predetermined start-time holding speed of rotation lower than the lowest rotational speed for a predetermined time before the lowest rotational speed is reached after the compressor is started.

Description

technical field [0001] The present invention relates to a cooling device including a compressor whose rotation speed can be controlled, and a refrigerant circuit using carbon dioxide as a refrigerant. Background technique [0002] Existing cooling devices of this type (such as display cabinets installed in stores) are connected to the compressors, gas coolers (condensers) and throttling units (capillary tubes, etc.) that constitute the condensing unit and the display cabinets installed in a ring in sequence by pipes. The evaporator on the main body side is connected to form a refrigerant circuit. The high-temperature and high-pressure refrigerant gas compressed by the compressor is discharged to the gas cooler. After radiating heat from the gas cooler, the refrigerant is throttled by the throttling unit and supplied to the evaporator. Therefore, the refrigerant evaporates, absorbs heat from the surroundings at this time, and exerts a cooling action to cool the interior of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B9/00F25B49/00F25B49/02
CPCF25B49/025Y02B30/741F25B2500/26F25B2600/23F25B2309/061F25B2600/021F25B9/008Y02B30/70F25B49/00
Inventor 山崎晴久松本兼三石垣茂弥山中正司山口贤太郎
Owner SANYO ELECTRIC CO LTD