Control method of refrigeration system, refrigeration system and air conditioner

Abstract

The application provides a control method for a refrigeration system, including a compressor and a hot gas bypass valve assembly, the hot gas bypass valve assembly includes a hot gas bypass valve and a control valve, and the first end of the hot gas bypass valve is connected to the exhaust of the compressor through a pipeline. The gas port is connected, the second end is connected with the compressor suction port through the pipeline, and the control valve is connected to the pipeline. The control valve is used to control the on-off of the hot gas bypass valve, including: detecting the thermostat load, thermostat load In order to adjust the ambient temperature to the preset temperature, it is necessary to supply the cooling capacity to the room; control the on-off of the control valve according to the thermostat load. According to the control method of the refrigeration system of the present application, the on-off of the hot gas bypass valve assembly can be controlled according to the temperature regulation load, which can effectively prevent the malfunction of the hot gas bypass valve and affect the comfort.

Description

technical field [0001] The application belongs to the technical field of air conditioners, and in particular relates to a control method of a refrigeration system, a refrigeration system and an air conditioner. Background technique [0002] At present, the fixed frequency unit is the mainstream type of marine refrigeration equipment. In the fixed frequency unit, the hot gas bypass valve can be used to unload the capacity of the unit, so as to avoid frequent start and stop of the unit in the scene of large thermal load changes, and improve comfort and reliability. The working principle of the hot gas bypass valve is to directly bypass the refrigerant from the high pressure side to the low pressure side, so as to reduce the refrigerant flow circulating in the system to achieve the purpose of unloading. [0003] However, the opening of the hot gas bypass valve is affected by the pressure of the low pressure side, that is, the lower the low pressure, the larger the opening, the...

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Problems solved by technology

[0003] However, the opening of the hot gas bypass valve is affected by the pressure of the low pressure side, that is, the lower the low pressure, the larger the opening, the more refrigerant bypassed, and the greater the capacity unloading

In actual application, the low pressure of the unit is affected by many factors, such as dirty evaporator, blockage of return air outlet, etc., which cannot fully represent the reduction of indoor load, and it is easy to cause low pressure fluctuations due to other factors to cause the bypass valve to malfunction and affect comfort

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