Refrigerating device

Abstract

The invention discloses a refrigerating device. The refrigerating device comprises a compressor, a reversing assembly, an outdoor heat exchanger, an indoor heat exchanger and a flash evaporator. The compressor comprises a shell, a compression mechanism and a bypass valve. A second air cylinder is provided with a second suction channel and a third suction channel. A connecting channel is connected between the second suction channel and the third suction channel. The bypass valve is used for controlling on-off of the connecting channel. An inner end opening of the bypass valve communicates with an air cylinder cavity of the second air cylinder. An outer end opening of the bypass valve communicates with two connecting pipelines in a switchable mode through a valve body assembly, one connecting pipeline is connected with an exhaust pipe, and the other connecting pipeline is connected with a first suction pipe or a second suction pipe. The flash evaporator is provided with a first port, a second port and an air port, and the air port is connected with the second suction pipe. According to the refrigerating device provided by the invention, the heat exchange efficiency of the evaporator can be improved, the low-temperature heating requirement is met, and the energy efficiency of the refrigerating device is improved.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a refrigeration device. Background technique [0002] In winter, due to the large temperature difference between indoors and outdoors, the heating capacity of the air-conditioning system will be greatly attenuated in low-temperature environments, which cannot meet the needs of users for heat. The reasons are as follows: First: In a low-temperature environment, the refrigerant density at the suction port of the compressor is low, resulting in a decrease in the amount of refrigerant suction, which in turn affects the heating capacity of the air conditioning system. Second: Due to the large temperature difference between indoor and outdoor, the difference between the evaporating temperature and the condensing temperature of the air-conditioning system is very large. After throttling, a large amount of gas will flash off, resulting in uneven distribution of refrigerant between different flo...

AI Technical Summary

Problems solved by technology

[0002] In winter, due to the large temperature difference between indoor and outdoor, the heating capacity of the air-conditioning system will be greatly attenuated in low-temperature environments, which cannot meet the needs of users for heat.

The reasons are as follows: First: In the low temperature environment, the refrigerant density at the suction port of the compressor is low, resulting in a decrease in the amount of refrigerant suction, which in turn affects the heating capacity of the air conditioning system

Second: Due to the large temperature difference between indoor and outdoor, the difference between the evaporating temperature and the condensing temperature of the air-conditioning system is very large. After throttling, a large amount of gas will flash off, resulting in uneven distribution of refrigerant between different flow paths of the evaporator, which affects the heat exchange efficiency of the evaporator. At the same time Since these flash gases enter the evaporator to absorb less heat, but occupy a large space in the evaporator pipe, the large surface area of ​​the pipe loses the function of liquid conduction, which further affects the heat exchange efficiency of the evaporator.

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