Cooling device

A refrigeration device and refrigerant technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, and can solve the problems of complicated control of valve devices

Active Publication Date: 2013-08-21
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, as described above, when the waste heat recovery heat exchanger is installed on the front stage side of the gas cooler, there is a problem that the control of the valve device on the separation cycle side is complicated in consideration of the control on the water heater side.

Method used

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Examples

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Embodiment Construction

[0089] 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.

[0090] 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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PUM

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Abstract

The invention provides a cooling device which is provided with a separation recycling device with a supercritical pressure formed at a high-pressure side, can provide hot water by using waste heat, and enables high-efficient operation of a refrigeration cycle. The cooling device (R) of the invention is provided with a separation recycling device with a supercritical pressure formed at the high-pressure side; the cooling device (R) is provided with a waste heat recovery heat exchanger (70), and the waste heat recovery heat exchanger (70) is provided with a waste heat recovery medium flow path (70B) and a refrigerant flow path (70A); and the cooling device (R) allows the second refrigerant flow (main refrigerant flow towards an evaporator) which flows out from a gas cooler (46) and has not flowed into an intermediate heat exchanger (80) forming the separation recycling device to flow into the refrigerant flow path (70A) of the waste heat recovery heat exchanger (70).

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. , thus using the evaporation of the refrigerant at that 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 the carbon dioxide refrigerant is a refrigerant with a large high-pressure difference, and has a low critical pressure, and the high-pressure side ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B29/00
CPCY02A30/274F25B49/02F25B2600/25F25B2400/072F25B2400/075F25B2400/04F25B41/20
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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