A low-temperature heating machine defrosting control scheme

Abstract

The invention discloses a defrosting control scheme for a low-temperature heating machine, which cannot solve the problem of not defrosting with frost or defrosting without frost, so that the unit cannot be defrosted in time and effectively or defrosted completely. The present invention is different from the existing traditional defrosting method. By detecting different parameter values ​​at different low ambient temperatures, it can be judged whether the unit needs to enter defrosting, so that it can timely judge the defrosting of the unit in time, and solve the problem of whether there is frost or not. The problem of defrosting or defrosting without frost The implementation of this case can improve the stability and heat transfer of the unit, reduce the frosting rate at low temperature and increase the defrosting rate.

Description

technical field

[0001] The invention is a defrosting control scheme for a low-temperature heating machine. Background technique

[0002] The defrosting problem in the air-conditioning system under low ambient temperature (7℃~-25℃) is a subject that needs to be overcome by air-conditioning designers. How to solve the problem of wrong defrosting during the operation of the air conditioner, that is, the problem of defrosting when there is frost and defrosting without frost is a way to realize energy saving of the air conditioner.

[0003] At present, most of the defrosting control methods in the market are as follows:

[0004] 1. Timing defrosting: under a certain ambient temperature, the unit defrosts at regular intervals;

[0005] 2. When the temperature of the outdoor coil is lower than a certain set temperature, it will defrost after a period of time;

[0006] The above two methods cannot solve the problem of non-defrosting or defrosting without frost, so that the unit c...

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