Defrosting control method for intelligent air cooling heat pump
A control method and technology of intelligent wind, applied in refrigeration and liquefaction, refrigerators, refrigeration components, etc., can solve problems such as reducing the heating operation time of the unit, affecting the heating effect of the unit, and affecting the heating effect, and achieving stable working temperature. , The effect of reducing the defrosting time and prolonging the service life
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[0021] After the unit starts running, detect the running time t of the compressor, the outdoor ambient temperature Ta, and the temperature Tc of the outdoor coil; the control parameters include: the unstable running time of the compressor t s , coil frosting temperature T s , Allowable frosting thickness temperature difference △T s ; Calculation parameters include: the difference between the outdoor ambient temperature and the outdoor coil temperature △T, the initial frosting temperature difference of the coil △T 0 .
[0022] (1) if figure 1 As shown, when t≤t s , then △T 0 =△T, the system does not enter defrosting;
[0023] (2) if figure 2 As shown, when t>t s , and Tc≥T s , then △T 0 =△T, the system does not enter defrosting;
[0024] (3) if image 3 As shown, when t>t s , and Tcs , △T≥△T s +△T 0 , the system enters defrosting.
[0025] The above control logic is aimed at the characteristics that condensed water is generated on the surface of the outdoor hea...
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