Method and device for recovering air conditioner coolants
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A recovery method and recovery device technology, which is applied in the recovery of air conditioner refrigerant and the field of air conditioner refrigerant recovery device, can solve the problems of wasting cost and low maintenance efficiency, and achieve the effect of avoiding high recovery cost and accurate judgment results
Active Publication Date: 2015-03-25
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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[0002] At present, the refrigerant recovery technology proposed in the related art can only recycle the refrigerant to the outdoor unit. If the outdoor unit fails, the refrigerant can only be discharged. In many cases, it is the outdoor unit that fai
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Embodiment 1
[0075] Such as Figure 4 As shown, according to an embodiment of the present invention, when the target recovery location is an outdoor unit, the recovery method for the refrigerant of the air conditioner includes:
[0076] Step 402, enter the working mode of refrigerant recovery, this working mode can be entered through the "refrigerant recovery" gear installed on the outdoor unit, or through the remote control dedicated to maintenance personnel or the corresponding function buttons on the wire controller Enter, this implementation case is not limited to the above three methods;
[0077] Step 404, for the internal and external units using the electronic expansion valve as the throttling device 9, all throttling electronic expansion valves are opened;
[0078] It is up to the maintenance personnel to judge whether to recover the refrigerant to the outdoor unit or to the indoor unit; for the air conditioning system that needs to recover the refrigerant to the outdoor unit, if th...
Embodiment 2
[0096] Such as Figure 5 As shown, according to an embodiment of the present invention, when the target recovery location is an outdoor unit or an indoor unit, the method for recovering the refrigerant of the air conditioner includes:
[0097] Step 502, when the air conditioner maintenance personnel decides to perform refrigerant recovery operation, turn on the refrigerant recovery function through the remote controller or the controller set on the electric control board of the outdoor unit;
[0098] Step 504, for an air-conditioning system equipped with electronic expansion valves 9 in the indoor and outdoor units, simultaneously open the electronic expansion valves 9 in the indoor and outdoor units;
[0099] In step 506, the maintenance personnel decides whether to recover the refrigerant to the indoor unit or the outdoor unit. If the refrigerant is selected to be recovered to the outdoor unit, go to step 508; otherwise, go to step 520.
[0100] In step 508, the four-way va...
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Abstract
The invention provides a method and device for recovering air conditioner coolants. The method comprises the steps that when a command to recover the coolants is received, an electronic expansion valve is opened; a target recovery position of the coolants is determined, if target recovery position is located at an outdoor unit, a liquid valve is closed, the air conditioner works in a refrigeration mode, and when it is detected that the first temperature changing value of an evaporator is larger than or equal to a first preset temperature changing value within a first preset period or the time during which the first pressure value in a suction pipeline of a compressor is smaller than a first preset pressure value is equal to the first preset period, an air valve is closed; if the target recovery position is located at an indoor unit, the air valve is closed, the air conditioner works in a heating mode, and when it is detected that the second temperature changing value of a condenser in the outdoor unit is larger than or equal to a second preset temperature changing value or the time during which the second pressure value in the suction pipeline is smaller than the second preset pressure value is equal to the second preset period, the liquid valve is closed, and the air conditioner is controlled to stop working. By means of the scheme, emission of the coolants is reduced, and maintenance cost is lowered.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner refrigerant recovery method and an air conditioner refrigerant recovery device. Background technique [0002] At present, the refrigerant recovery technology proposed in the related art can only recycle the refrigerant to the outdoor unit. If the outdoor unit fails, the refrigerant can only be discharged. In many cases, it is the outdoor unit that fails. Therefore, the refrigerant proposed in the related technology Recycling technology cannot meet the maintenance requirements at this stage, because discharging the refrigerant not only wastes costs, but also reduces maintenance efficiency. [0003] Therefore, how to flexibly select the recovery location of the refrigerant and accurately detect whether the recovery of the refrigerant is completed has become a technical problem to be solved urgently on the premise of ensuring that the recovered refrigeran...
Claims
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Application Information
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