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 such as quality control risks, polluting unit surfaces, affecting production efficiency, etc., and achieve no refrigeration oil residue , Low cost of improvement, and the effect of avoiding residues at the nozzle
Active Publication Date: 2019-12-03
NINGBO AUX ELECTRIC +1
View PDF5 Cites 3 Cited by
- 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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
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, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a refrigerant recovery control method and an air conditioning system, and the refrigerant recovery control method comprises the steps of closing a high-pressure stop valve aftera liquid collection command is received; judging whether the system pressure is greater than a first preset pressure; if the system pressure is not greater than the first preset pressure, operating in a heating mode; if the system pressure is greater than the first preset pressure, operating in a refrigeration mode; closing a low-pressure stop valve. According to the refrigerant recovery controlmethod, the detection of the system pressure is added in the refrigerant recovery control, so that the refrigerant recovery can be completed only after the system pressure reaches a certain value, andby means of the mode that the refrigerant backflow speed is increased to drive the refrigerant oil recovery, therefrigerant oil can be completely recovered, it is guaranteed that the surface of a stop valve pipe opening is clean, and the refrigerant oil residues do not exist. The control method is simple in principle and wide in application range, and by being improved only on the basis of an existing commodity inspection test system, the improvement cost is low, and the control method is easy to popularize.
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More 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