Exhausting assisted method for controlling electronic expansion valve

Abstract

The invention discloses an exhausting assisted method for controlling an electronic expansion valve. The method is characterized by comprising the following steps: calculating an actual opening degree of the electronic expansion valve by a heat pump controller through a back temperature and a coiled pipe temperature of a detection system and controlling the electronic expansion valve; and at a time period 3-10 minutes after a compressor is opened and after the compressor is opened for 10 minutes, adjusting the electronic expansion valve by different manners according to a target exhausting temperature and an actually-measured exhausting temperature. According to the method, the opening degree is automatically adjusted in an assisted manner according to the exhausting temperature on the basis of previous superheat degree control so that a heat pump system can work efficiently all the time, and the problem that the electronic expansion valve cannot do corresponding movement when a working condition of a set is changed is solved; the setting of time intervals is adjusted so that the defrosting time of the set is effectively prolonged and the defrosting efficiency of the set is reduced; the efficient operation of the heat pump system is facilitated. The exhausting assisted method for controlling the electronic expansion valve, disclosed by the invention, can be widely applied to the field of heat pump control.

Description

technical field [0001] The invention relates to the field of heat pump control, in particular to a method for exhaust auxiliary control of an electronic expansion valve. Background technique [0002] The traditional heat pump system usually adjusts the electronic expansion valve according to the single superheat degree of the system. The control method is to calculate the actual opening degree of the electronic expansion valve by detecting the return air temperature and the coil temperature of the system, and then control the electronic expansion valve to perform corresponding actions. The controller controls the electronic expansion valve every 30s to act according to the current calculated actual opening, but such a control method still has the following problems during use: [0003] 1. When the unit is running under variable conditions, the electronic expansion valve sometimes fails to operate, making the unit unable to work at an efficient working point; [0004] 2. It ...

AI Technical Summary

Problems solved by technology

[0003] 1. When the unit is running under variable conditions, the electronic expansion valve sometimes fails to operate, making the unit unable to work at an efficient working point;

[0004] 2. It makes it easy for the unit to enter the defrosting mode. Frequent defrosting of the unit not only increases the energy consumption of the unit, but also reduces the efficiency of the unit

Images