Air conditioning system and cooling control method of variable-frequency driver of air conditioning system
A variable frequency drive, air conditioning system technology, applied in air conditioning systems, refrigerators, heating methods, etc., can solve the problems of low precision, easy water leakage, slow control response, etc., to ensure reliable operation, high adjustment accuracy, and fast control response. Effect
Inactive Publication Date: 2019-03-29
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
However, after the frequency converter is added, the variable frequency drive generates a lot of heat during the operation of the unit and needs to be cooled
There are two traditional cooling methods. One is to use water cooling, which is prone to water leakage and cause electrical safety problems; The accuracy is not high, the control response is slow, the unit is easy to overheat, or the cold plate is condensed due to low temperature
Method used
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific examples are only used to explain the present invention, but not to limit the present invention.
[0017] figure 1 It is a schematic diagram of the air conditioning system of the present invention. The air conditioning system includes a compressor 1 , a condenser 2 , a throttling device 3 and an evaporator 4 . The refrigerant is compressed by the compressor 1 to become a high-temperature and high-pressure gas, cooled by the condenser 2, and then becomes a high-pressure normal-temperature liquid and enters the liquid receiver, and then becomes a low-temperature and low-pressure liquid through the throttling device 3, and finally evaporates and exchanges heat in the evaporator 4 After that, it becomes a low...
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The invention discloses an air conditioning system and a cooling control method of a variable-frequency driver of the air conditioning system. The air conditioning system comprises a throttling device. The two ends of the throttling device are connected with a branch in parallel, and a front electronic expansion valve, a cooling plate for cooling the variable-frequency driver, and a rear electronic expansion valve are sequentially arranged on the branch. According to the structure and method for cooling the variable-frequency driver through the double electronic expansion valves, the adjustingprecision is high, the control response is rapid, the cooling plate of the variable-frequency driver can be controlled at proper temperature, and therefore reliable operation of a frequency converterset is guaranteed.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system and a cooling control method for a variable frequency drive thereof. Background technique [0002] In summer, 45% to 50% of the electrical energy of buildings is used for air-conditioning and cooling, and the energy consumption of chillers accounts for more than 40% of the energy consumption of air-conditioning. Therefore, energy saving is an issue that must be considered in air-conditioning systems. Non-inverter air-conditioning units are usually selected according to the maximum load, while the air-conditioning system operates under partial load most of the time, which may cause frequent start and stop of the unit, or waste energy. The frequency conversion air conditioner unit can greatly improve the part-load performance of the unit, keep the unit in an energy-saving and efficient operating state, reduce the starting current of the unit, and...
Claims
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Login to View More IPC IPC(8): F24F11/30F24F1/24F25B41/06F25B41/34
CPCF24F1/24F24F11/30F25B2600/2513F25B2500/08F25B41/31Y02B30/70
Inventor 刘华张治平龙忠铿罗炽亮张丙
Owner GREE ELECTRIC APPLIANCES INC