Low-temperature enthalpy spraying unit

Abstract

The invention discloses a low-temperature enthalpy spraying unit. The low-temperature enthalpy spraying unit comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an economizer, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and an enthalpy spraying reversing valve, wherein the indoor heat exchanger and the outdoor heat exchanger communicate with the compressor; an air outlet of the economizer communicates with an air supply opening of the compressor; the first pipeline communicates with the indoor heat exchanger; the second pipeline communicates with the outdoor heat exchanger; the third pipeline communicates with a first inlet of the economizer; the fourth pipeline communicates with a liquid outlet of the economizer; and the enthalpy spraying reversing valve can enable the first pipeline to communicate with the fourth pipeline and enable the second pipeline to communicate with the third pipeline simultaneously, and the enthalpy spraying reversing valve can also enable the first pipeline to communicate with the third pipeline and enable the second pipeline to communicate with the forth pipeline simultaneously. A second inlet of the economizer communicates with the third pipeline or the fourth pipeline. The first inlet communicates with the liquid outlet. The second inlet communicates with the air outlet. According to the low-temperature enthalpy spraying unit, the number of parts and components is decreased, accordingly, the number of joints of the pipelines is effectively decreased, the leakage flow risks are reduced, and the reliability of the whole unit is improved; and a pipeline system is simplified, and the manufacturing difficulty of the whole unit is lowered.

Description

technical field [0001] The invention relates to the technical field of low-temperature enthalpy injection, and more specifically, relates to a low-temperature enthalpy injection unit. Background technique [0002] Heat pump units and air conditioning units often use low-temperature enthalpy injection technology to improve energy efficiency. For the low-temperature enthalpy injection unit, the high-pressure liquid refrigerant flowing out of the condenser enters the economizer in two ways, and then flows out in two ways, one into the evaporator and the other into the compressor. [0003] At present, the refrigerant flow direction is changed through a three-way joint and a one-way valve. Specifically, such as figure 1 with figure 2 As shown, during refrigeration, the refrigerant reaches the three-way joint A1, the refrigerant reaches the three-way joint A3 through the action of the one-way valve B1 and the one-way valve B2, and the refrigerant flows to the economizer 13 thr...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned low-temperature enthalpy-injecting unit uses three-way joints and one-way valves to change the flow direction of the refrigerant. At least four three-way joints and four one-way valves are required, resulting in more parts and more joints of pipelines, and there is a greater risk of leakage , making the whole unit less reliable

[0005] In addition, changing the flow direction of the refrigerant through the three-way joint and the one-way valve makes the pipeline more complicated and makes the manufacturing of the whole unit more difficult.

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