Defrosting method of multi-combination type air conditioning unit
A multi-connected air conditioner and unit technology, applied in refrigerators, heating methods, refrigeration components, etc., can solve the problems of unreasonable use of heat, reduce coil temperature, reduce defrosting effect, etc., to avoid high temperature and high pressure faults and shutdowns The effect of shortening the time and improving the defrosting effect
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[0024] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0025] Such as figure 1 As shown, an embodiment of the defrosting method of the multi-connected air conditioning unit of the present invention. In this embodiment, each outdoor unit includes a fixed frequency compressor 4 and a variable frequency compressor 3, and the two compressors are connected in parallel. It includes the following steps:
[0026] a. Start the compressor of the outdoor unit in heating mode.
[0027] b. Measure the temperature T on the frosting side of the coil of the outdoor heat exchanger 1 of each outdoor unit by the defrost temperature sensor on the frosting side of the coil of the outdoor heat exchanger 1 of each outdoor unit 0 , Send the temperature measurement result to the main controller of the air conditioner, when the main controller judges the T of an outdoor unit 0 When it is lower than -12°C, the main controller of the air condit...
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