Receiver tank for refrigeration cycle, heat exchanger with the receiver tank, and condensation device for refrigeration cycle

Abstract

A receiver tank has a tubular tank body (30) with a refrigerant inlet hole (3a) and a refrigerant outlet hole (3b) that are formed in its lower wall (321). The upper end of the opening of the refrigerant inlet hole (3a) is positioned lower than the upper end of the opening of the refrigerant outlet hole (3b). At the upper end of the opening of the refrigerant inlet hole (3a) is provided a resistance layer (335) at which the speed of flow of a refrigerant is reduced by permeation of the refrigerant. The refrigerant flowing in from the refrigerant inlet hole (3a) permeates upward the resistance layer (335) to form a collection (R) of liquid in a space in the tank. A liquid refrigerant in the collection (R) is discharged through the refrigerant outlet hole (3b). Because of the structure above, the refrigerant can be saved, the structure can be simplified, and costs can be reduced.

Description

technical field [0001] The present invention relates to storage tanks for refrigerating cycles, heat exchangers with storage tanks, and condensing devices for refrigerating cycles, which are suitable for use in automobiles, households, and commercial air-conditioning systems. Background technique [0002] In the refrigeration cycle of the expansion valve system, which is one of the representative systems of the refrigeration cycle, such as Figure 13 As shown, the high-temperature and high-pressure gas refrigerant ejected from the compressor CP enters the condenser CD, exchanges heat with the outside air, and then cools, condenses and liquefies, and mainly flows into the storage tank RT in a liquid phase state, after complete gas-liquid separation , only the liquid refrigerant is exported, and after being rapidly decompressed and expanded by the expansion valve, it is introduced into the evaporator EP in the form of a low-pressure and low-temperature mist refrigerant. During ...

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Problems solved by technology

[0009] However, for a general refrigeration cycle, the flow rate of refrigerant flowing from the side of the condenser CD to the storage tank RT is high, so in Figure 14A ~ Figure 14C In the interlayer type shown, a large turbulent region of the liquid refrigerant occurs in the upper side space 133 into which the refrigerant flows, and as a result, the liquid refrigerant accumulates in the upper side space 133, so the liquid refrigeration The agent cannot be fully supplied to the lower side space 134; or the tiny remaining liquid in the lower side space 134 is disturbed by the high-speed liquid flow passing through the desiccant filling layer 132, and gas refrigerant bubbles are generated at the same time, due to the large-scale liquid surface Fluctuation, gaseous refrigerant flows out from the refrigerant outlet 137 exposed in the gas phase; or a phenomenon that a large number of bubbles are involved in the derived liquid refrigerant, the stability of performance related to load fluctuations deteriorates, and the above-mentioned stable range becomes Narrow, it will be difficult to save refrigerant and reduce size and weight

[0010] and, in Figure 14A as well as Figure 14B In the shown storage tank, the refrigerant pipes 36 and 38 must be assembled inside the tank, which increases the number of parts, complicates the structure, and increases the cost.

[0011] Furthermore, in Figure 14D In the pocket-type storage tank shown, the flow rate of the internal refrigerant will be greater than that of the sandwich-type storage tank, and the turbulent flow will also be greater, so the liquid level of the refrigerant near the refrigerant outlet 137 will also be less stable. stable, the gas refrigerant will flow out more easily, causing the same problem as above

[0012] Additionally, for Figure 15 As shown in the storage tank, the refrigerant pipe 39 must be assembled inside the tank, so it is the same as the above Figure 14A and Figure 14B There are problems such as complication of the structure and increase of the cost, just like the storage tank of the

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