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Stirling cooling device, cooling chamber, and refrigerator

a cooling device and cooling chamber technology, applied in the direction of cooling fluid circulation, domestic cooling apparatus, lighting and heating apparatus, etc., can solve the problems of poor heat transmission efficiency, high volatile, and use of ethanol, and achieve the effect of efficient transfer, efficient release, and improved heat transmission efficiency

Inactive Publication Date: 2005-01-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] An object of the present invention is to provide a Stirling cooling apparatus or cooler that complies with the regulation of refrigerants based on HCFCs and HFCs and that offers improved cooling efficiency by exploiting latent heat. Another object of the present invention is to provide a large-capacity, low-power-consumption refrigerator that offers good heat exchange efficiency.

Problems solved by technology

In this arrangement, however, since the cold is transferred by exploiting the sensible heat of the secondary refrigerant, temperature difference arises within the refrigerant pipe 25, leading to poor heat transmission efficiency.
Moreover, ethanol used as the secondary refrigerant has a low flash point (about 12.8° C.) and is highly volatile, requiring care in its handling.
This increases the load on the refrigerant pump 26, and thus reduces the energy efficiency of the Stirling cooling apparatus.

Method used

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  • Stirling cooling device, cooling chamber, and refrigerator
  • Stirling cooling device, cooling chamber, and refrigerator
  • Stirling cooling device, cooling chamber, and refrigerator

Examples

Experimental program
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Effect test

first embodiment

[0045] In the figure, arrows indicate the direction of the flow of the refrigerant. In this embodiment, carbon dioxide is used as the refrigerant. The configuration and operation of the Stirling chiller 1 shown in FIG. 2 are the same as in the first embodiment described above, and therefore its explanations will not be repeated.

[0046] When the linear motor (not shown) is driven, on the principle described earlier, waste heat is transferred to the high-temperature portion 2 of the Stirling chiller 1, raising the temperature of the high-temperature portion 2, and simultaneously cryogenic cold is produced in the low-temperature portion 3. Then, in the high-temperature-side heat exchanger 4 arranged so as to be in contact with the high-temperature portion 2, the waste heat is released out of the Stirling chiller 1 by air or water used as a heat carrier.

[0047] Simultaneously, the circulation pump 6 is also driven so that the refrigerant is circulated around the refrigerant circulation c...

fifth embodiment

[0083] In this way, by incorporating the chiller system of the fifth embodiment in a large, horizontal-type refrigerator, it is possible to effectively exploit the height of the refrigerator in the arrangement of the low-temperature-side heat exchanger portion 30 and the high-temperature-side heat exchanger portion 31. Moreover, by arranging the freezer compartment 46 nearest to the low-temperature-side evaporator 7 and arranging the vegetables compartment 45 under the refrigerator compartment 44, it is possible to effectively use the cold air inside the refrigerator chamber of the refrigerator 42.

[0084] Industrial Applicability

[0085] As described above, according to the present invention, the use of latent heat obtained through vaporization and liquefaction of the refrigerant contributes to better heat transmission efficiency than when sensible heat is exploited. Thus, cold is efficiently transferred to inside the refrigerator or cooler chamber, or heat is efficiently released to ...

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PUM

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Abstract

In a Stirling cooling apparatus, a refrigerant is circulated within a refrigerant circulation circuit in such a way that the refrigerant receives cold, as latent heat, from a Stirling chiller and then releases the cold, by absorbing heat of vaporization, as it vaporizes in an evaporator, thereby cooling the inside of a refrigerator chamber. As the refrigerant, carbon dioxide, a natural refrigerant, can be suitably used.

Description

TECHNICAL FIELD [0001] The present invention relates to a cooling apparatus, cooler, and refrigerator employing a Stirling chiller. BACKGROUND ART [0002] As is well known, conventionally, refrigerants based on CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) have been in wide use as working fluids in chilling and air-conditioning systems. However, refrigerants based on CFCs have already been totally banned, and the use of refrigerants based on HCFCs is regulated by the international treaty for the protection of the ozone layer. On the other hand, newly developed refrigerants based on HFCs (hydrofluorocarbons) do not destroy the ozone layer, but are powerful global warming substances having global warming coefficients as high as several hundred to several thousand times that of carbon dioxide. Thus, these are also targets of emission regulation. [0003] For this reason, as an alternative technology to the vapor-compression cooling cycle which uses a refrigerant mentione...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25D17/00F25B1/00F25B9/14F25B25/00F25D11/00F25D11/02F25D16/00F25D17/06
CPCF25B9/14F25B25/005F25D17/062F25D11/00F25D11/025F25B2309/06
Inventor ZHANG, HENGLIANGCHEN, WEINISHIMOTO, TAKASHIMASUDA, MASAAKI
Owner SHARP KK
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