heat pump

Abstract

The heat pump control method, wherein an oil filter is arranged on the connecting pipe between the oil separator and the suction port of the compressor, and the exhaust port of the compressor is also passed through the cooling accumulator, the first solenoid valve 11, the second section The flow mechanism in turn connects the accumulator to the suction side of the compressor. When the temperature on the exhaust side rises abnormally, open the solenoid valve to let it pass through the heat exchange of the cooling accumulator and the expansion of the second throttling mechanism, which can quickly reduce part of the exhaust temperature; the outlet of the oil separator and the steering device There is also a pipeline between them, which is connected to the auxiliary heat exchanger through the cooling accumulator, the second solenoid valve, and then connected to the suction side of the compressor through the second throttling mechanism and the gas-liquid separator. When the pressure on the exhaust side of the compressor rises too fast, the second solenoid valve is opened to operate the cooling accumulator and the auxiliary heat exchanger to reduce the exhaust pressure.

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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