Refrigerant recovery control device and use method thereof

Abstract

The invention provides a refrigerant recovery control device and a use method thereof for an air-conditioner production test. The refrigerant recycling control device comprises a pressure sensor, a switch, an alarm and a main board, wherein the pressure sensor is arranged on a low-voltage pipe of an inner machine of an air-conditioner; the switch is connected between a power source and a socket, and the socket is used for supplying the power to an outdoor machine of the air-conditioner to be tested; and the main board is provided with a detecting module and a control module, wherein when a pressure value reaches a set value, the main board controls the alarm to alarm and controls the switch to switch off after the interval of the set time. A low voltage value is detected by using the pressure sensor, and the pressure sensor is smartly combined with the switch through the control logic of the main board, thereby the switch is controlled to power off when the pressure of the sensor reaches the set value so as to prevent a compressor from idling to cause the loss. Besides, the invention also realizes inching electrification by combination of an alternating current contact and an inching switch so that the operation is safer.

Description

technical field [0001] The invention relates to the field of air conditioner refrigerant recovery, and in particular to a refrigerant recovery control device used in the production test of an air conditioner external unit. Background technique [0002] In the testing process of the production of the outdoor unit of the air conditioner, the docking test of the inner and outer units is required. After the test is completed, the refrigerant in the common indoor unit needs to be recycled to the outer unit of the product. The specific method of refrigerant recovery is as follows (see figure 1 ), the small valve 11 of the high-pressure pipe of the external unit is closed first when the whole machine is in cooling operation, at this time the refrigerant cannot be discharged into the evaporator 13 of the internal In the external unit condenser 14, when the low pressure reaches the set value, start to close the large valve 12 of the low pressure pipe, and then turn off the power to ...

AI Technical Summary

Problems solved by technology

This method of operation has some disadvantages. Firstly, the operator cannot see the pressure gauge 16 clearly, which may cause errors; moreover, the recovery pressure point is not easy to grasp, and the consistency of the unit cannot be guaranteed; in addition, manual power-off increases the operation The operating steps of the operator will affect the efficiency, and the compressor may be damaged if the power is not cut off in time

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