Energy level control method and control device for double-system heat pump unit

Abstract

The invention provides an energy level control method and control device for a double-system heat pump unit. The energy level control method for the double-system heat pump unit comprises the steps that when the double-system heat pump unit runs in a heating mode, the temperature value of inlet water is detected in real time; when the temperature value of the inlet water meets a preset heating working condition, compressors of two heat pump systems of the double-system heat pump unit are started; after the two compressors are started, when it is judged that the temperature value of the inlet water is larger than the preset target heating temperature value, one compressor of the double-system heat pump unit is closed; after one compressor is closed, when it is judged that the temperature value of the inlet water is smaller than the preset target heating temperature value, the closed compressor of the heat pump system is started again; and after the closed compressor is started again, when it is judged that the temperature value of the inlet water is equal to the preset maximum temperature value, the compressors of the two heat pump system of the double-system heat pump unit are closed. According to the energy level control method and control device for the double-system heat pump unit, frequent starting of the compressor can be effectively avoided, and therefore the energy consumption of the double-system heat pump unit is reduced.

Description

technical field [0001] The invention relates to the technical field of heat pump equipment, in particular to an energy level control method and a control device for a dual-system heat pump unit. Background technique [0002] In the prior art, after the dual-system heat pump unit is started at the target temperature, one of the heat pump systems is shut down when the return water temperature is lower than the negative hysteresis of the target temperature. Since the water temperature at this time has not reached the target temperature setting value, Another remaining heat pump system is needed for heating. [0003] At present, when the dual-system heat pump unit is operating in the low-temperature environment in the north, due to the large heat dissipation, only one heat pump system cannot meet the heating demand, and the water temperature cannot rise. After a period of time, the water temperature drops, and one of the heat pump systems is turned off. It will start again, and...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an energy level control method and control device for a dual-system heat pump unit to solve the problem that the compressor of one of the heat pump systems frequently starts up when the existing dual-system heat pump unit operates in a low-temperature environment, and cannot achieve The technical problem of the target temperature, so as to avoid the frequent start of the compressor, thereby saving energy and effectively reaching the target temperature

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