Control method, device and system for supplementing air and increasing enthalpy, and air conditioning system
A technology for supplementing air to increase enthalpy and air-conditioning systems, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems affecting system performance and reliability, and achieve high reliability and performance
Active Publication Date: 2017-02-22
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
During the working process of the air conditioning system, the system process mostly adopts the secondary throttling intermediate flash air supply system, and the intermediate supply air enthalpy increase pressure is controlled by the electronic expansion valve throttling, and the operating conditions are variable due to the fixed position of the compressor air supply port , in actual operation, it is unavoidable that the pressure after the flashing of the air supply in the middle is lower than the pressure at the compressor inlet for air supply and enthalpy increase, which will lead to the backflow of the compressor refrigerant, which will greatly affect the system performance and reliability.
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] As mentioned in the background art, after the existing air-conditioning system with flasher enters the mode of replenishing air and increasing enthalpy, refrigerant backflow often occurs, which greatly affects the reliability of the air-conditioning system. One of the main reasons for this defect is: due to the fixed position of the air supply port of the compressor and the variable operating conditions, it is inevitable in actual operation that the pres...
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The invention discloses a control method, a control device and a control system for gas replenishing and enthalpy increasing and an air conditioning system. The control method includes detecting temperature of a flash tank and temperature of replenishing gas delivered to a compressor when the air conditioning system enters a gas-replenishing and enthalpy-increasing mode, comparing the temperature of the flash tank with that of the replenishing gas, and controlling the air conditioning system to exit the gas-replenishing and enthalpy-increasing mode when the temperature of the flash tank is lower than that of the replenishing gas and reaches a preset temperature for a preset time. After the air conditioning system enters the gas-replenishing and enthalpy-increasing mode, relation between pressure at a gas replenishing port of the compressor and pressure of the flash tank can be acquired according to relation between the temperature of the flash tank and the replenishing gas. According to actual application, when the temperature of the flash tank is lower than that of the replenishing gas and reaches the preset temperature for the preset time, backflow of refrigerant can be achieved; in other words, the refrigerant of the compressor flows back into the flash tank through a gas replenishing pipe, and the air conditioning system is controlled to exit the gas-replenishing and enthalpy-increasing mode at this time; thus, high reliability of the air conditioning system is guaranteed.
Description
technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically, relates to a method, device and system for controlling air supplementation and enthalpy increase, and an air conditioning system. Background technique [0002] With the development of my country's air-conditioning industry, air-conditioning plays an increasingly important role in people's work and study life. During the working process of the air conditioning system, the system process mostly adopts the secondary throttling intermediate flash air supply system, and the intermediate supply air enthalpy increase pressure is controlled by the electronic expansion valve throttling, and the operating conditions are variable due to the fixed position of the compressor air supply port , In actual operation, it is inevitable that the pressure after the mid-air supplement throttling flash is lower than the pressure at the air supplement enthalpy increase port of the...
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IPC IPC(8): F24F11/00
Inventor 尚瑞林海佳刘彩赢王东曹巍
Owner GREE ELECTRIC APPLIANCES INC