Heat pump system and air conditioner

Abstract

The invention discloses a heat pump system and an air conditioner. The heat pump system comprises a compressor assembly, an outdoor heat exchanger, an indoor heat exchanger, a heating heat storage device and a switching device; the compressor assembly, the switching device, an outdoor heat exchanger and an indoor The heat exchangers are connected in sequence to form a refrigeration circuit, and the heating heat storage device and the switching device are arranged in series; the heat pump system has the first heating mode, the second heating mode and the defrosting mode. In the first heating mode, the compressor assembly discharges The refrigerant enters the indoor heat exchanger and the outdoor heat exchanger sequentially through the switching device and the heating heat storage device, and flows back to the compressor assembly; in the defrosting mode, the refrigerant discharged from the compressor assembly enters the indoor heat exchange sequentially through the switching device The refrigerant flowing out of the outdoor heat exchanger flows back to the compressor assembly through the heat storage device. The heat pump system of the technical solution of the present invention can also heat the room during the defrosting process, so as to realize the non-stop heating and defrosting function.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a heat pump system and an air conditioner using the heat pump system. Background technique [0002] In the heating mode of the heat pump system, the refrigerant absorbs heat from the outdoor side through the outdoor heat exchanger, and then increases the pressure and temperature through the compressor, and discharges the heat from the outdoor side to the room to achieve the heating effect. But in winter, the lower the outdoor temperature, the refrigerant in the outdoor heat exchanger needs to be lower than the temperature of the outdoor air because it needs to absorb the heat of the outdoor air, which will cause the outdoor heat exchanger to frost in the heating mode. After frosting, defrosting is required to ensure the safe and effective operation of the system. [0003] The existing heat pump system needs to absorb heat from the indoor side during the defrosting proce...

AI Technical Summary

Problems solved by technology

[0003] The existing heat pump system needs to absorb heat from the indoor side during the defrosting process, causing the indoor temperature to drop, and the indoor unit cannot heat normally, and when the outdoor unit returns to the heating mode, it takes a period of time to switch and start the compressor gradually. Heats the refrigerant system, thereby reducing operating energy efficiency

[0004] In addition, when the outside temperature is low, the refrigerant oil discharged from the compressor has a strong miscibility with the liquid refrigerant. After being separated by the oil separator, most of the refrigerant oil returned to the compressor is liquid refrigerant. Late rise to less than safe concentration

In order to ensure system reliability, the existing heat pump system needs to operate at low frequency for a long time to vaporize the liquid refrigerant in the compressor, reduce the refrigerant content in the refrigerant oil returned by the oil separator, and increase the refrigerant oil content in the compressor to a safe level. After the concentration is high, it can operate normally. This process lasts for a long time. Even after more than ten minutes of starting up, the indoor unit still has no hot air blowing out, and the startup speed is slow.

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