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Refrigerant recovery control method and air conditioning system

A control method and refrigerant recovery technology, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve problems affecting production efficiency, customer complaints, pollution of the surface of the unit, etc., to achieve no refrigerated oil residue, It is easy to achieve the effect of promotion and wide application

Active Publication Date: 2021-08-27
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After analysis, the "bubble" is due to the residual refrigerant in the refrigeration oil. When it is under low pressure, the refrigerant volatilizes, which looks like a leak inside the stop valve. This will cause misjudgment in production, seriously affect production efficiency, and bring Quality Control Risk
In addition, the refrigerated oil remaining in the nozzle of the stop valve will overflow from the nozzle, contaminate the surface of the unit, and cause customer complaints

Method used

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  • Refrigerant recovery control method and air conditioning system
  • Refrigerant recovery control method and air conditioning system
  • Refrigerant recovery control method and air conditioning system

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Embodiment Construction

[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] During the commercial inspection and test, the air conditioner is generally tested for heating mode operation and cooling mode operation, and then the liquid collection operation (recovering the refrigerant in the pipeline to the compressor of the outdoor unit) is performed so that the subsequent indoor and outdoor units can be disconnected. When the connection is opened, there will be no residual refrigerant in the indoor unit, and the amount of refrigerant in the compressor can also be guaranteed.

[0035] The two ends of the pipeline of the indoor heat exchanger of the air conditioner communicate with the outdoor heat exchanger and the compressor respectively through a high-pressure cut-off valve and a low-pressure cut-off valve, ...

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Abstract

The present invention provides a refrigerant recovery control method and an air conditioning system. The refrigerant recovery control method includes the steps of: closing the high-pressure cut-off valve after receiving a liquid collection command; judging whether the system pressure is greater than the first preset pressure; if the system If the pressure is not greater than the first preset pressure, it will operate in heating mode; if the system pressure is greater than the first preset pressure, it will operate in cooling mode; close the low pressure cut-off valve. The refrigerant recovery control method described in the present invention increases the detection of system pressure in the refrigerant recovery control, so that the refrigerant recovery can only be completed after the system pressure reaches a certain value. This way of driving refrigeration oil recovery by increasing the refrigerant return speed , can achieve clean recovery of refrigeration oil, ensure that the surface of the stop valve nozzle is clean, and there is no refrigeration oil residue; and the control method is simple in principle and has a wide range of applications. It is only improved on the basis of the existing commercial inspection and testing system, and the improvement cost is low and easy. Achieve promotion.

Description

technical field [0001] The invention relates to the technical field of refrigeration oil recovery, in particular to a refrigerant recovery control method and an air conditioning system. Background technique [0002] During the commercial inspection and testing process of the air conditioning system, refrigeration recovery is required. In the prior art, during refrigeration recovery, some air-conditioning system products have a large amount of refrigerated oil residue inside the nozzle of the shut-off valve, and "bubbles" will emerge from them, and the "bubbles" will disappear after being placed for a period of time. After analysis, the "bubble" is due to the residual refrigerant in the refrigeration oil. When it is under low pressure, the refrigerant volatilizes, which looks like a leak inside the stop valve. This will cause misjudgment in production, seriously affect production efficiency, and bring Quality control risks. In addition, the refrigerated oil remaining in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B45/00F25B49/02F24F11/64F24F11/88F24F140/12
CPCF25B45/00F25B49/02F24F11/64F24F11/88F24F2140/12
Inventor 陈建中陈观水边红杰黄伟黄良友
Owner NINGBO AUX ELECTRIC
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