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Refrigeration apparatus

a technology for refrigerating equipment and refrigeration components, which is applied in the direction of refrigeration components, lighting and heating equipment, machines, etc., can solve the problem of overflow of refrigerant, etc., and achieve the effect of simplifying the apparatus configuration

Inactive Publication Date: 2014-12-11
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a refrigeration apparatus that can cool and heat. It is designed so that it can handle any excess refrigerant that may be produced during the cooling process when the outdoor heat exchanger is the same capacity as the indoor heat exchanger. This simplifies the apparatus as it eliminates the need for two separate containers for refrigerant storage and gas-liquid separation.

Problems solved by technology

Therefore, in this case, refrigerant that cannot be accommodated in the outdoor heat exchanger during the air-cooling operation (excess refrigerant) is produced, and the quantity of this refrigerant exceeds the quantity that can be stored in the refrigerant storage tank or the like.

Method used

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  • Refrigeration apparatus
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Examples

Experimental program
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Effect test

modification 1

[0110](4) Modification 1

[0111]In the above embodiment, a container for storing refrigerant is employed as the refrigerant storage tank 25, but refrigerant storage is not limited as such, and a cyclone-type gas-liquid separator such as the one shown in FIG. 5 may be employed, for example.

[0112]The refrigerant storage tank 25 of the present modification has primarily a cylindrical container 251, a first connecting tube 252, a second connecting tube 253, and a third connecting tube 254.

[0113]The first connecting tube 252 is linked in the tangential direction of the circumferential side wall of the cylindrical container 251, communicating the interior of the cylindrical container 251 and the second expansion mechanism 26 or first expansion mechanism 24 as a downstream-side expansion mechanism. The second connecting tube 253 is linked to the bottom wall of the cylindrical container 251, communicating the interior of the cylindrical container 251 and the first expansion mechanism 24 or se...

modification 2

[0117](5) Modification 2

[0118]In the above embodiment and Modification 1, an example was given in which the outdoor heat exchanger 23 is a stacked heat exchanger having a plurality of flat tubes 231 and corrugated fins 232. In this outdoor heat exchanger 23, the plurality of flat, tubes 231 are arrayed so as to be superposed set apart by gaps, and the corrugated fins 232 are enclosed between adjacent flat tubes 231.

[0119]However, the outdoor heat exchanger 23 is not limited to the configurations in the above embodiment and Modification 1, and may be a stacked heat exchanger having a plurality of flat tubes 231 arrayed so as to be superposed set apart by gaps, and fins 236 in which notches 236a are formed, the flat tubes 231 being inserted into the notches, as shown in FIGS. 6 and 7, for example.

[0120]The same operational effects as those of the above embodiment and Modification 1 can be achieved in this case as well.

modification 3

[0121](6) Modification 3

[0122]In the above embodiment and Modification 1, an example was given in which the outdoor heat exchanger 23 is a stacked heat exchanger having a plurality of flat tubes 231 and corrugated fins 232. In this outdoor heat exchanger 23, the plurality of flat tubes 231 are arrayed so as to be superposed set apart by gaps, and the corrugated fins 232 are enclosed between adjacent flat tubes 231.

[0123]However, the outdoor heat exchanger 23 is not limited to the configurations in the above embodiment and Modification 1, and may have a configuration in which the flat tubes are molded into serpentine shapes and the fins are enclosed between the mutually adjacent surfaces of the flat tubes, for example.

[0124]The same operational effects as those of the above embodiment and Modifications 1 and 2 can be achieved in this case as well.

[0125](7) Modification 4

[0126]In the above embodiment and Modifications 1 to 3, the outdoor heat exchanger 23 is a stacked heat exchanger h...

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PUM

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Abstract

In an air-conditioning apparatus, refrigerant flows sequentially through a compressor, an outdoor heat exchanger, expansion mechanisms, and an indoor heat exchanger during a cooling operation, and refrigerant flows sequentially through the compressor, the indoor heat exchanger, the expansion mechanisms, and the outdoor heat exchanger during a heating operation. Capacity of the outdoor heat exchanger is 30% to 90% of the indoor heat exchanger. The expansion mechanisms include an upstream-side and downstream-side expansion mechanisms depressurizing refrigerant from high to intermediate pressure, and from intermediate to low pressure in the refrigerant cycle, respectively. The refrigerant is R32. A refrigerant storage tank that stores the intermediate pressure refrigerant is provided between the upstream-side and downstream side expansion mechanisms. The refrigerant storage tank stores an excess refrigerant produced during the cooling operation due to capacity of the outdoor heat exchanger relative the indoor heat exchanger.

Description

TECHNICAL FIELD[0001]The present invention relates to a refrigeration apparatus, and particularly relates to a refrigeration apparatus capable of performing a cooling operation and a heating operation.BACKGROUND ART[0002]In conventional refrigeration apparatuses such as air-conditioning apparatuses capable of air-cooling and air-warming operations, there is a difference between the optimal refrigerant quantity for an air-cooling operation (cooling operation) and the optimal refrigerant quantity for an air-warming operation (heating operation). Accordingly, there is a difference between the capacity of an outdoor heat exchanger functioning as a heat radiator of refrigerant during the air-cooling operation and the capacity of an indoor heat exchanger functioning as a heat radiator of refrigerant during the air-warming operation. Because the capacity of the outdoor heat exchanger is greater than the capacity of the indoor heat exchanger, refrigerant that cannot be accommodated by the i...

Claims

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Application Information

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IPC IPC(8): F25B29/00F25B43/00F25B1/00
CPCF25B29/003F25B43/00F25B1/005F25B13/00F25B2313/02741F25B2313/0314F25B2400/13F25B2400/23F25B39/00F25B2400/12F25B41/39
Inventor SETOGUCHI, TAKAYUKITANIMOTO, KEISUKEOKUDA, NORIYUKIOKUI, TAKAMUNESHIMODA, JUNICHIYAMADA, TSUYOSHI
Owner DAIKIN IND LTD