Refrigerant charging device

Abstract

The invention discloses a refrigerant charging device which comprises a single-chip microcomputer (100), a plurality of paths of charging mechanisms (200) and a refrigerant pipeline (300). The charging mechanisms (200) are communicated with the refrigerant pipeline (300) and a charged evaporator (01). An electronic expansion valve (310), a first solenoid valve (320), a heat exchanger (330), a gas-liquid separator (340), a first pressure sensor (350), a second solenoid valve (360), a second pressure sensor (370), a first flowmeter (380) and a third solenoid valve (390) are arranged on the refrigerant pipeline (300). The charging mechanisms (200), the electronic expansion valve (310), the first solenoid valve (320), the heat exchanger (330), the first pressure sensor (350), the second solenoid valve (360), the second pressure sensor (370), the first flowmeter (380) and the third solenoid valve (390) are electrically connected with the single-chip microcomputer (100). The refrigerant charging device has multiple kinds of charging modes and is high in speed and precision, and energy saving and environmental protection are achieved.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a refrigerant charging device for charging refrigerant to an indoor unit evaporator of an air conditioner. Background technique [0002] During the quality inspection of the evaporator of the indoor unit of the air conditioner, the refrigerant is usually filled into the evaporator for leak detection. The refrigerant charging device used in traditional air conditioner indoor unit evaporator leak detection generally installs a pressure reducing valve on the refrigerant pipeline. Charge the indoor unit evaporator. [0003] The refrigerant charging device used in traditional air conditioner indoor unit evaporator leak detection can only charge one specific refrigerant at a time, and the charging form is single; the pressure and flow of the refrigerant charged are uncontrollable, and the charging accuracy is relatively high Low, resulting in a great waste of resources; and usually ...

AI Technical Summary

Problems solved by technology

[0003] The refrigerant charging device used in traditional air conditioner indoor unit evaporator leak detection can only charge one specific refrigerant at a time, and the charging form is single; the pressure and flow of the refrigerant charged are uncontrollable, and the charging accuracy is relatively high low, resulting in a great waste of resources; moreover, what is charged is usually liquid refrigerant. Due to the large amount of liquid refrigerant charged, it will be discharged into the outside air after the leak detection of the evaporator is completed, causing serious air pollution.

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