Defrosting control method for refrigerating unit and refrigerating unit

Abstract

The invention discloses a defrosting control method for a refrigerating unit and the refrigerating unit. The defrosting control method comprises the steps that the return air temperature, the air supply temperature, the low-pressure pressure and the air inlet and outlet pressure difference of the refrigerating unit are detected, when the temperature difference between the return air temperature and the air supply temperature meets the condition that the temperature difference between the return air temperature and the air supply temperature is larger than a first preset temperature differencevalue delta T<1> and less than or equal to a second preset temperature difference value delta T<2>, whether the low-pressure pressure is less than or equal to a low-pressure pressure preset value P<1>or not is judged, when the low-pressure pressure is less than or equal to the low-pressure pressure preset value P<1>, whether the air inlet and outlet pressure difference is larger than a first preset pressure difference value delta P<1> or not is judged, and if yes, defrosting is started; and if it is detected that the air inlet and outlet pressure difference is less than a second preset pressure difference value delta P<2>, defrosting is finished. According to the defrosting control method, compared with the prior art, the defrosting misjudgment probability is reduced, the defrosting precision is greatly improved, invalid defrosting is reduced, energy can be saved, the defrosting effect is guaranteed, and then the problem that the refrigerating temperature fluctuates too much is solved.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a defrosting control method of a refrigeration unit and the refrigeration unit. Background technique [0002] At present, in the refrigeration unit of new energy refrigerated vehicles, there are two traditional defrosting methods. One is interval defrosting. The time is preset according to the experience value, and the defrosting is defrosted through the interval time. This defrosting mode is forced defrosting. It is easy to cause energy waste, and lead to inaccurate defrosting and low efficiency; the other is automatic defrosting. The defrosting method is easily affected by other factors, and it is easy to misjudge, resulting in inaccurate defrosting. Contents of the invention [0003] The invention proposes a defrosting control method of a refrigeration unit and the refrigeration unit, which solve the problems of inaccurate defrosting and low efficiency in th...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a defrosting control method of a refrigeration unit and a refrigeration unit, which solves the problems of inaccurate defrosting and low efficiency in the traditional defrosting method

Images