Air conditioning apparatus
a technology for air conditioning and equipment, applied in the direction of light and heating equipment, indirect heat exchangers, refrigeration components, etc., can solve the problem of difficult distribution of refrigerant evenly across the refrigerant path, and achieve the effect of high heat exchange performan
Inactive Publication Date: 2009-11-19
DAIKIN IND LTD
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AI Technical Summary
Benefits of technology
The present invention relates to an air conditioning apparatus that uses a supercooling heat exchanger. The technical effect of this invention is to improve the performance of the evaporator by increasing the difference in enthalpy of the evaporator side to reduce circulating volume and prevent refrigerant drifting into the condenser or evaporator. This is achieved by providing a liquid-gas heat exchanger that prevents backflow into the compressor and reduces pressure loss on the evaporator side. Additionally, the invention solves the problem of less efficient heat exchange between the refrigerant flows during cooling and heating modes by dividing the supercooling heat exchanger into two heat exchangers and flowing the refrigerant countercurrent to each other in one of the heat exchangers.
Problems solved by technology
Therefore, even if the capacity of the flow divider portion to distribute the refrigerant is improved to a maximum, it is difficult to distribute the refrigerant evenly throughout the refrigerant paths.
Method used
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Embodiment Construction
[0042]FIGS. 1 and 2 of the attached drawings show the configuration of the entirety and relevant parts of the refrigerant circuits in an air conditioning apparatus according to a preferred embodiment of the present invention.
[0043]First, as shown in FIG. 1, in the air conditioning apparatus of this embodiment, a compressor 1, a four-way switching valve 2, an outdoor-side heat exchanger 3 that functions as a condenser during the cooling operation and as an evaporator during the heating operation, a heating expansion valve 4, a receiver 5, a cooling expansion valve 6, an indoor-side heat exchanger 8 that functions as an evaporator during the cooling operation and as a condenser during the heating operation, and other components are connected sequentially via the four-way switching valve 2, thereby constituting a refrigerating cycle for air conditioning as shown in the drawing.
[0044]The switching operation of the four-way switching valve 2 allows refrigerant to be reversibly circulated...
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A supercooling heat exchanger of an air conditioning apparatus is configured to exchange heat between a high-pressure refrigerant and a low-pressure refrigerant. The supercooling heat exchanger is divided into first and second heat exchangers. One of the first and second heat exchangers is disposed so that the high-pressure refrigerant and the low-pressure refrigerant flow countercurrent to each other. The other of the first and second heat exchangers is disposed so that the high-pressure refrigerant and the low-pressure refrigerant flow parallel to each other. Preferably, both heat exchangers have a high-pressure liquid refrigerant pipe that is wound around the external periphery of a low-pressure refrigerant suction pipe. The heat exchangers are thereby reduced in size.
Description
TECHNICAL FIELD[0001]The present invention relates to an air conditioning apparatus that uses a supercooling heat exchanger.BACKGROUND ART[0002]FIG. 4 shows a configuration of an air conditioning apparatus that uses a conventional supercooling heat exchanger.[0003]In this air conditioning apparatus, a compressor 1, a four-way switching valve 2, an outdoor-side heat exchanger 3 that functions as a condenser during the cooling operation and as an evaporator during the heating operation, a heating expansion valve 4, a receiver 5, a cooling expansion valve 6, an indoor-side heat exchanger 8 that functions as an evaporator during the cooling operation and as a condenser during the heating operation, and other components are connected sequentially via the four-way switching valve 2, thereby constituting a refrigerating cycle for air conditioning as is shown in the drawing.[0004]The switching operation of the four-way switching valve 2 allows a refrigerant to be reversibly circulated in th...
Claims
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IPC IPC(8): F25B39/02
CPCF25B13/00F25B40/00F28D7/106F28D7/0016F25B2313/02741F25B1/00
Inventor SETOGUCHI, TAKAYUKIKOJIMA, MAKOTO
Owner DAIKIN IND LTD