Air injection enthalpy increasing system, air conditioning unit with the system and the enthalpy increasing control method

Abstract

The invention provides a gas injection enthalpy increasing system, comprising a compressor (1), a condenser (2) connected to the compressor outlet (11), and a flash evaporator connected to the condenser outlet (21) (3), the flasher (3) also includes a first outlet (31), the first outlet (31) is connected to the secondary inlet (12) of the compressor, the secondary inlet (12) and At least one first expansion valve (4) is also arranged between the first outlets (31) of the flash evaporator. According to the gas injection enthalpy increasing system of the present invention, it can effectively prevent the refrigerant from flowing back, and improve the efficiency of the air conditioning unit, especially the heat pump. The stability of the system will not affect the normal and stable operation of the air conditioning unit, especially the heat pump system. It can also effectively increase the increment of its enthalpy value on the basis of the original system, and effectively increase the internal energy of the system and its ability to do volume work with the outside. and value. The invention also provides an air conditioning unit with the system and the enthalpy increase control method.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air conditioning, and in particular relates to an air injection enthalpy increasing system, an enthalpy injection control method of a compressor with an enthalpy injection function, and an air conditioner unit with an air injection enthalpy increasing system. Background technique [0002] In order to increase the effective enthalpy of the unit system, the existing conventional air-conditioning units often add a flash evaporator in the middle pipeline of the refrigeration cycle to evaporate part of the refrigerant and then fill it into the compressor, thereby reducing the refrigerating power in the compressor. The agent plays the role of replenishing qi and increasing enthalpy. However, when the pressure at the inlet of the compressor is higher than the pressure at the outlet of the flash evaporator, part of the refrigerant will flow backwards and flow back into the flash evaporator, seri...

AI Technical Summary

Problems solved by technology

However, it still has the following disadvantages: due to the delay of the temperature sensing package and the requirements of the sampling time interval, it will inevitably happen that the enthalpy injection solenoid valve is not closed in time, which will cause the refrigerant at the enthalpy injection port of the compressor to flow back into the flash evaporator At the same time, the commonly used solenoid valve still has reverse leakage when it is closed, so that it will seriously reduce the performance of the heat pump system and affect the operation stability of the heat pump system

[0004] Therefore, due to the existence of refrigerant backflow in the above-mentioned existing system, which seriously reduces the performance of the heat pump system and affects the operation stability of the heat pump system, the present invention researches and designs a new air injection enthalpy increasing system, an air conditioning unit with the system and The enthalpy control method

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