Heat pump

Abstract

According to a control method for a heat pump, an oil filter is further arranged on a connecting pipe between an oil separator and a suction port of a compressor, and an exhaust port of the compressor is further connected with a gas-liquid separator and connected to the suction side of the compressor sequentially via a cooling energy accumulator, a first electromagnetic valve 11 and a second throttle mechanism. When the temperature of the exhaust side rises abnormally, the first electromagnetic valve is opened, and then partial exhaust temperature can be lowered quickly through heat exchange of the cooling energy accumulator firstly and expansion of the second throttle mechanism. A pipeline is further arranged between an outlet of the oil separator and a steering device. The outlet of the oil separator is connected to an auxiliary heat exchanger through the cooling energy accumulator and a second electromagnetic valve and then connected to the suction side of the compressor through the second throttle mechanism and the gas-liquid separator sequentially. When it is detected that the pressure of the exhaust side of the compressor rises too fast, the second electromagnetic valve is opened, the cooling energy accumulator and the auxiliary heat exchanger are operated, and then the exhaust pressure is lowered.

Description

Technical field: [0001] The invention relates to the technical field of heat pump / refrigeration energy saving. Background technique: [0002] Heat pump is an energy-saving, environment-friendly and comfortable refrigeration system, which is widely used in factories, laboratories and public facilities. The system usually includes a closed circuit composed of a compressor, a four-way valve, an outdoor heat exchange device, a throttling mechanism, and an indoor heat exchanger. [0003] In the existing technology, when the heat pump unit runs for a certain period of time, the impurities in the oil accumulate, resulting in the accumulation of impure substances in the oil return pipeline, resulting in insufficient oil returned to the compressor, thus affecting the performance of the compressor and the performance of the unit Even burn out the compressor. And when the pressure on the high-pressure side of the compressor and the exhaust temperature are too high due to this, the so...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, when the heat pump unit runs for a certain period of time, the impurities in the oil accumulate, resulting in the accumulation of impure substances in the oil return pipeline, resulting in insufficient oil returned to the compressor, thus affecting the performance of the compressor and the performance of the unit Even burn out the compressor

And when the pressure on the high-pressure side of the compressor and the exhaust temperature are too high due to this, the solution in the prior art is to stop the compressor, wait for a period of time, and then start running

As a result, the operating efficiency of the system is affected, and the life of the heat pump unit is also reduced.

[0004] Moreover, since the compressor and its connecting pipeline need to be dismantled when the engine oil is blocked, the heat pump cannot be operated, and the process of disassembly and assembly also consumes a lot of processes and is expensive

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