Starting method of heat pump system

Abstract

The invention discloses a starting method of a heat pump system. The heat pump system comprises a compressor, an oil separator and a refrigerant heater, wherein a refrigerant inlet of the refrigerantheater communicate an exhaust port of the compressor, and a refrigerant outlet of the refrigerant heater communicates an oil inlet of the oil separator; in the heating mode, the starting method of theheat pump system comprises the following steps that the outdoor environment temperature T is detected; when T is less than or equal to T0, the refrigerant heater is started when the refrigerant heater works normally; when the refrigerant heater cannot normally operate, the compressor starts at a frequency A1 corresponding to the set exhaust temperature TP1, the frequency A1 is operated for a preset time t, whether the exhaust temperature reaches TP2 or not is judged, if the exhaust temperature does not reach TP2, the frequency is increased delta P is operated for a preset time t again, whether the exhaust temperature reaches TP2 or not is judged, and if the exhaust temperature does not reach TP2, the delta P is increased for a preset time t again, an whether the exhaust gas temperature reaches TP2 or not is judged until the frequency is increased to A2, and A2 is operated until the exhaust gas temperature reaches TP2. Thus, the start-up time can be shortened.

Description

technical field [0001] The invention belongs to the technical field of air treatment equipment, and in particular relates to a method for starting a heat pump system. Background technique [0002] When the existing heat pump system is started, it is generally divided into hot start and cold start according to the difference in outdoor ambient temperature. When the outdoor ambient temperature is high, the compressor starts in the hot start mode, and the start-up time is short. When the outdoor ambient temperature is low, the compressor starts in the cold start mode, and the start-up time is long. When the heat pump system is hot started, according to the starting frequency and running time, the oil level of the compressor and the compression ratio of normal operation can be basically guaranteed, but when starting at low ambient temperature, especially in extremely cold winter nights, the cold start method should be followed. The frequency and time of operation, the start-up ...

AI Technical Summary

Problems solved by technology

When the heat pump system is started hot, according to the starting frequency and running time, the oil level of the compressor and the compression ratio of normal operation can be basically guaranteed, but when starting at a low ambient temperature, especially in extremely cold winter nights, the cold start method should be followed. The frequency and time of operation, the start-up time is too long, the purpose of room heating cannot be achieved quickly, and the compressor cannot be guaranteed to operate within the safe operation range of the normal compressor

Images