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Low-temperature heating bypass system of air source heat pump

An air source heat pump and bypass system technology, applied in the field of air conditioning, can solve problems such as attenuation of evaporation capacity, pressure drop at the suction port of the compressor, and deterioration of the working conditions of the evaporator, so as to increase the effective heating capacity and avoid damage

Inactive Publication Date: 2007-08-01
劳特斯空调(江苏)有限公司
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Problems solved by technology

However, in winter, as the outdoor ambient temperature decreases, the working conditions of the evaporator of the conventional air-conditioning system gradually deteriorate, and the evaporation capacity gradually decays, which makes the evaporation of the refrigeration system insufficient, resulting in the liquid return phenomenon of the compressor, and at the same time, the pressure of the suction port of the compressor decline, so that the reliability of system operation cannot be effectively guaranteed, and even cause the compressor to burn out

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  • Low-temperature heating bypass system of air source heat pump

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Embodiment Construction

[0010] As shown in the figure, the refrigeration cycle system adopts a bypass device adapted to the evaporation load. The whole system consists of compressor 1, gas-liquid separator 2, temperature sensor 3, pressure sensor 4, electromagnetic control valve 5, four-way reversing valve 6, electromagnetic valve controller 7, outdoor heat exchanger 8, heating expansion valve 9, The heating check valve 10, the cooling expansion valve 11, the cooling check valve 12 and the indoor heat exchanger 13 are composed. An ordinary electromagnetic control valve is used for bypass control and is installed in the pipeline between the exhaust port and the air return port of compressor 1; the temperature sensor 3 and pressure sensor 4 are installed on the air return pipeline of compressor 1 for Measure the pressure and temperature parameters of the air return pipeline of the compressor; the temperature sensor 3, the pressure sensor 4 and the electromagnetic control valve 5 are all electrically co...

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Abstract

The invention discloses an air heat pump low-temperature heating bypass system, wherein, there is a bypass electromagnetic valve in tube between the gas outlet and the reflux opening of compressor; a temperature and a pressure sensor at the reflux tube of compressor; the bypass electromagnetic control valve, temperature sensor, pressure sensor and the electromagnetic valve controller are electrically connected. The invention checks the pressure and temperature of reflux tube of compressor in heating mode, the electromagnetic valve controller via the pressure and temperature to control the switch frequency of electromagnetic valve, control the reflux pressure and overheat degree, to make the compressor and refrigerator work normally in low-temperature and ultra-low-temperature condition. And the invention engages the coolant reflux with area of heat exchanger, without refluxing the coolant and damaging the compressor.

Description

technical field [0001] The invention belongs to the technical field of air conditioners. Specifically relates to an air source heat pump low temperature heating bypass system. Background technique [0002] The air source heat pump air conditioning system is widely promoted and applied in the air conditioning industry, mainly because of its excellent heat transfer performance and the convenience of installation location. However, in winter, as the outdoor ambient temperature decreases, the working conditions of the evaporator of the conventional air-conditioning system gradually deteriorate, and the evaporation capacity gradually decays, which makes the evaporation of the refrigeration system insufficient, resulting in the liquid return phenomenon of the compressor, and at the same time, the pressure of the suction port of the compressor Decrease, so that the reliability of system operation cannot be effectively guaranteed, and even cause the compressor to burn out. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B41/04
Inventor 徐勤虎陈振乾丁伟
Owner 劳特斯空调(江苏)有限公司
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