Refrigerant recovery device and method of heat pump of air-conditioner and outdoor unit of air-conditioner

Abstract

The invention discloses a refrigerant recovery device and a method of a heat pump of an air-conditioner and an outdoor unit of the air-conditioner. The recovery device comprises a compressor, a multiported valve, an outdoor heat exchanger, a gas-liquid separator, a throttling part, a liquid side stop valve and a gas side stop valve. The output end of the compressor is respectively connected with the outdoor heat exchanger and the gas side stop valve through the multiported valve. The input end of the compressor is connected with the gas-liquid separator which is connected with the gas side stop valve through the multiported valve. The outdoor heat exchanger is connected with the liquid side stop valve through the throttling part and the liquid side stop valve is connected with the gas side stop valve through a junction pipe. According to the invention, the junction pipe connects the liquid side stop valve with the gas side stop valve in the outdoor unit of the air-conditioner, therefore, not only is refrigerating and heating test run detection of the outdoor unit on a production line guaranteed, but also the refrigerant recovery effect of the outdoor unit is guaranteed so that the reliability of the outdoor unit is further improved. For the outdoor unit with large groundwater recharge, the refrigerant recovery time is shortened and the production efficiency is improved greatly.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner heat pump refrigerant recovery device and method, and an air conditioner outdoor unit. Background technique [0002] Usually, after the outdoor unit of the split type air conditioner is assembled on the production line, it needs to be connected to the indoor unit on the production line for cooling and heating trial operation testing. After the test run is completed, the refrigerant in the system needs to be recovered to the outdoor unit. [0003] The existing refrigerant recovery device includes: outdoor unit, indoor unit, connecting pipe between indoor and outdoor unit and low pressure detection device (pressure gauge or pressure sensor), among which: [0004] Taking the cooling mode as an example, the refrigerant recovery process is roughly as follows: run the cooling mode, first close the liquid side shut-off valve, and the compressor compresses th...

AI Technical Summary

Problems solved by technology

[0005] However, when the air-conditioning equipment uses heat exchangers with very small heat exchange volumes such as bushings, plate heat exchangers, or micro-channels as outdoor heat exchangers, due to the small volume of these heat exchangers, if the above scheme is still used, in In the process of recovering refrigerant, it is easy to have over-high discharge pressure protection or over-high discharge temperature protection, which will lead to incomplete recovery of refrigerant and affect the reliability of the outdoor unit.

Images