Compression system with intermediate air supply, air conditioning system and judging control method thereof

Abstract

The invention provides a compression system with intermediate air supply, comprising a compressor (1), an intermediate air supply pipeline (2) and an air supply valve (3) arranged on the intermediate air supply pipeline (2), wherein according to refrigeration agent flow direction, the first pressure detection device (4) and the first temperature detection device (5) are installed at the inlet end of the air supply valve (3) on the middle air supply pipeline (2), and the second pressure detection device (5) is located at the outlet end. A temperature detection device (6), the system further includes a second pressure detection device (7) and a third temperature detection device (8) arranged on the discharge pipeline (11) of the compressor (1). Through the present invention, it can be accurately judged whether there is liquid in the middle of the air supplement of the compressor, and whether there is a small amount or a large amount of liquid in the air supplement, thereby avoiding the dilution of lubricating oil in the compressor, the wear and tear of the compressor and even the generation of liquid in the compressor due to the liquid in the middle air supplement. occurrence of a hit. The invention also relates to an air-conditioning system with the compression system and a judgment control method.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a compression system with intermediate air supply, an air conditioning system and a judgment control method thereof. Background technique [0002] The lower the ambient temperature, the greater the demand for the heating capacity of the air conditioner. However, the current single-stage compression heat pump can only start and run normally at minus 20 degrees, and the heating capacity is seriously attenuated. The heating effect cannot be guaranteed, and the reliability of the unit is also severely affected. test. [0003] Compared with single-stage compression heat pumps, the two-stage compression system with air injection enthalpy increases the heating capacity at low temperatures and has higher energy efficiency. And the two-stage compression system can reduce the pressure ratio of the single-stage compressor, lower the exhaust temperature, and at the same...

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the compression system in the prior art cannot accurately judge whether the intermediate air supply is filled with liquid, thereby providing a compression system with intermediate air supply, an air conditioning system and its Judgment control method

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