Heat pump unit

Abstract

The invention discloses a heat pump unit. The heat pump unit comprises a gas-liquid separator which is connected between a reversing assembly and an outdoor heat exchanger in series. The gas-liquid separator comprises a shell, a first in-out pipe and a second in-out pipe, an inner cavity of the shell comprises a separation cavity, a rotary cavity extending along the axis in the vertical direction is formed in the separation cavity, the bottom end of the shell is provided with an oil return opening communicated with the separation cavity, the first in-out pipe and the second in-out pipe are connected to the shell, the first in-out pipe is communicated with the separation cavity in the tangential direction to form a communication opening, the second in-out pipe stretches into the inner cavity from the top end of the shell, and a pipe opening, stretching into the inner cavity, of the second in-out pipe is located under the communication opening. The first in-out pipe is connected with the reversing assembly, and the second in-out pipe is connected with the outdoor heat exchanger. According to the heat pump unit, the oil separation efficiency achieved in refrigerating of the unit can be improved, the problem that liquid is carried when the unit quits a defrosting or refrigerating mode to run in a heating mode is solved, losses of the depressurized side are reduced, and the refrigerating capacity and efficiency of the unit are improved.

Description

technical field [0001] The invention relates to the field of refrigeration and heating equipment, in particular to a heat pump unit. Background technique [0002] In a commonly used heat pump unit, when the unit is running for refrigeration, the cycle flow is: compressor → oil separator → four-way valve → fin heat exchanger → electronic expansion valve → evaporator → four-way valve → gas-liquid separator → compressor . When the unit is running for heating, the cycle flow is: compressor→oil separator→four-way valve→evaporator→electronic expansion valve→fin heat exchanger→four-way valve→gas-liquid separator→compressor. The unit continuously transmits the cold or heat of the unit to the air-conditioning terminal system through the circulating water in the evaporator to achieve the purpose of cooling and heating. [0003] The traditional air-cooled heat pump unit, whether it is cooling or heating, circulates through the oil separator and the gas-liquid separator. The oil sepa...

AI Technical Summary

Problems solved by technology

The oil separator on the high pressure side will increase the exhaust pressure of the unit and increase the energy consumption of the unit

The gas-liquid separator on the low-pressure side reduces the suction pressure of the compressor and reduces the cooling capacity of the unit

And the unit system is complex, which increases the difficulty of manufacturing

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