Vapor-injected air-conditioning system, vapor-injected air-conditioning control method and air-conditioner

Abstract

The invention provides a vapor-injected air-conditioning system, a vapor-injected air-conditioning control method and an air-conditioner, which can solve the problems of incapability of refrigerant flow adjustment, complex structure, poor refrigerating / heating effect and the like of the prior art. The technical scheme includes that the vapor-injected air-conditioning system comprises a compressor, a controller, a four-way valve, a condenser, an evaporator, a flash evaporator, an electromagnetic valve and refrigerant pipes. Two refrigerant pipe connector ends of the flash evaporator are arranged at the refrigerant pipes between the evaporator and the condenser and connected with the refrigerant pipes on the respective side, a refrigerant outlet at one end of the flash evaporator is connected with the compressor through one refrigerant pipe provided with a one-way valve and the electromagnetic valve, and an electronic expansion valve is arranged on the refrigerant pipe arranged between the condenser and the flash evaporator. A vapor-injected flow control system is simplified, cost is reduced, refrigerant flow control of the system is optimized by using the electronic expansion valve for controlling, and refrigerating and heating performances are improved.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning and refrigeration engineering, and in particular relates to an air-supplementing and enthalpy-increasing air-conditioning system which adopts an electronic expansion valve to dynamically adjust flow. Background technique [0002] Existing air-conditioning systems that supplement air to increase enthalpy all use capillary tubes for throttling. The air-supplement and throttling parts are complex in structure, and dynamic refrigerant flow adjustment cannot be realized. The cost is high, and the heating effect cannot be fully exerted. [0003] figure 1 It is a form of air-conditioning system that supplements air and increases enthalpy, see figure 1 , the technical solution process is: [0004] During the refrigeration cycle, the solenoid valve A9 and solenoid valve B18 in the system are closed. Refrigeration cycle process: compressor 1 discharges high-temperature and high-pressure refriger...

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Problems solved by technology

[0007] The present invention provides an air-conditioning system for replenishing air and increasing enthalpy, a control method and an air conditioner, which can solve the problems existing in the prior art that the refrigerant flow cannot be adjusted, the structure is complex, and the cooling / heating effect is poor.

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