Limit working condition protecting device

Abstract

The invention relates to a protecting device, in particular to a limit working condition protecting device. The limit working condition protecting device comprises a condenser liquid outlet pipe, a condenser, a compressor exhaust gas pipe, a liquid pump discharging pipe, a liquid pump, a liquid pump input pipe, a compressor, a compressor sucking pipe, a gas-liquid separator, a gas-liquid separator gas inlet pipe, a controller, a first liquid level sensor and a second liquid level sensor, wherein the condenser liquid outlet pipe, the condenser, the compressor exhaust gas pipe, the compressor, the compressor sucking pipe, the gas-liquid separator and the gas-liquid separator gas inlet pipe are sequentially connected. The limit working condition protecting device has the advantages that when the liquid in the gas-liquid separator is excessive, the liquid is pumped to the condenser, the refrigerant supercooling at the bottom of the condenser is realized, the liquid impact caused by the fact that the liquid refrigerant is sucked into the compressor is prevented, the size of the gas-liquid separator is lowered, the manufacturing materials are saved, the space is reduced, and the limit working condition protecting device is simple to install and easy to produce and operate.

Description

technical field [0001] The invention relates to a protection device, in particular to a protection device for extreme working conditions. Background technique [0002] The existing air-cooled heat pump air-conditioning system often works under extreme conditions, especially in winter heating work. Due to the low outdoor ambient temperature, the heating capacity attenuates greatly, and often cannot meet the requirements of the air-conditioning heat load. The temperature of the air-conditioning room Lower, less comfort. At this time, the air-cooled heat pump air-conditioning system will increase the pressure of the condenser of the refrigeration system and reduce the pressure of the evaporator, so that the entire refrigeration system needs more refrigerant when heating than when cooling. When the working conditions change, there will be no evaporation. The liquid refrigerant returns to the compressor and is compressed, due to the incompressible characteristics of the liquid, ...

AI Technical Summary

Problems solved by technology

[0002] The existing air-cooled heat pump air-conditioning system often works under extreme conditions, especially in winter heating work. Due to the low outdoor ambient temperature, the heating capacity attenuates greatly, and often cannot meet the requirements of the air-conditioning heat load. The temperature of the air-conditioning room lower, lower comfort

At this time, the air-cooled heat pump air-conditioning system will increase the pressure of the condenser of the refrigeration system and reduce the pressure of the evaporator, so that the entire refrigeration system needs more refrigerant when heating than when cooling. When the working conditions change, there will be no evaporation. The liquid refrigerant returns to the compressor and is compressed, due to the incompressible characteristics of the liquid, it will cause the "liquid hammer" failure of the compressor

In order to prevent "liquid shock", the current air-cooled heat pump air-conditioning system installs a larger gas-liquid separator at the suction port of the compressor, which not only increases the cost, but also takes up space.

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