Control method of heat pump unit

Abstract

The invention belongs to the field of air conditioning equipment, and particularly provides a control method of a heat pump unit. The invention aims to solve the problem that an energy efficiency factor is not considered in the existing control method of the heat pump unit during adjustment of the opening aperture of a throttling valve. The control method comprises the following steps: obtaining an air suction superheat degree of a compressor; and comparing the air suction superheat degree with a preset range, and then controlling an operation opening aperture of the throttling valve in selective combination with a difference between water feeding temperature and water discharging temperature of the heat pump unit according to a comparison result of the air suction superheat degree and the preset range. Therefore, the throttling valve can select different control methods according to different working conditions, and the opening aperture of the throttling valve can be set to be the optimal operation opening aperture, so that the heat pump unit can generate the maximum energy efficiency to ensure that the heat pump unit can keep an efficient operation state all the time.

Description

technical field [0001] The invention belongs to the field of air conditioning equipment, and in particular relates to a control method for a heat pump unit. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Specifically, most of the existing air conditioners use heat pump units, and the heat pump units need to control the flow rate of refrigerant through throttling devices. In order to realize the intelligent control of the heat pump unit, preferably, the existing heat pump unit mostly adopts an electronic expansion valve as a throttling device of the unit. The electronic expansion valve can accurately and quickly control the flow of the refrigerant by controlling the opening in real time, so as to realize the rapid and eff...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing control method of the heat pump unit does not consider the energy efficiency factor when adjusting the opening of the throttle valve, which may easily cause the heat pump unit to be in a state of low-efficiency operation for a long time, thereby causing energy waste, the present invention provides A control method of a heat pump unit, the heat pump unit including a compressor and a throttle valve, characterized in that the control method includes the following steps: acquiring the suction superheat of the compressor; calculating the suction superheat Comparing with a predetermined range; according to the comparison result of the suction superheat and the predetermined range, selectively combining the temperature difference between the inlet and outlet water of the heat pump unit to control the operating opening of the throttle valve

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