Air conditioner oil return control method and system, storage medium and air conditioner
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A technology of oil return control and storage medium, which is applied in the field of air conditioner oil return control method and its system, and can solve the problem that the air conditioner cannot adjust the oil return amount, etc.
Active Publication Date: 2019-12-20
TCL AIR CONDITIONER ZHONGSHAN CO LTD
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[0005] The technical problem to be solved by the present invention is to provide an air conditioner oil return control method and its system in view of the above-mentioned defects of the prior art, aiming at solving the problem that the air conditioner in the prior art cannot adjust the oil return amount according to the oil demand of the system question
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specific Embodiment 1
[0052] Under rated cooling conditions:
[0053] Since v=(D2-D1) / t, D2 is located at 300mm, D1 is located at 200mm of oil content, and t is 10s. Then v=10mm / s.
[0054] Under rated cooling conditions, Vs1 is 5mm / s, and n is 2; at this time, the action of oil return expansion valve 3 is:
[0055] ΔP1=n*(v-Vs1)=2*5=10pls. That is, the oil return expansion valve is closed by 10 steps.
specific Embodiment 2
[0057] Under rated thermal conditions:
[0058] Since v=(D2-D1) / t, D2 is located at 300mm, D1 is located at 500mm of oil content, and t is 10s. Then v=-20mm / s.
[0059] Under rated heating conditions, Vs2 is -10mm / s and m is 3; at this time, the action of oil return expansion valve 3 is:
[0060] ΔP2=m*(Vs2-v)=30pls. That is, the oil return expansion valve is opened by 30 steps.
[0061] Based on the above air conditioner oil return control method, the present invention also provides a preferred embodiment of a storage medium:
[0062] The storage medium according to the embodiment of the present invention stores an air conditioner oil return control program, and when the air conditioner oil return control program is executed, the steps of the air conditioner oil return control method according to any one of the above embodiments are implemented.
[0063] Based on the above air conditioner oil return control method, the present invention also provides a preferred embodimen...
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Abstract
The invention discloses an air conditioner oil return control method and system, a storage medium and an air conditioner. The method includes the steps that the oil level change speed in an oil separator is detected in real time; and the opening degree of an oil return expansion valve is adjusted according to the oil level change speed. The system oil quantity requirement can be judged according to the oil level change speed in the oil separator, the oil return amount is controlled by adjusting the opening degree of the oil return expansion valve of the oil separator, and it is ensured that the system oil quantity is in the stable equilibrium state all the time.
Description
technical field [0001] The invention relates to the technical field of air conditioners, and in particular, to a method and a system for controlling oil return of an air conditioner. Background technique [0002] Multi-unit air conditioners are characterized by many internal units, long pipelines and large drop, so they have higher requirements for lubricating oil, but too much or too little suction of lubricating oil has a negative effect on energy efficiency. At present, the oil return in the multi-line industry mainly depends on the size and time of the load output of the air conditioner to control the oil return operation, and the amount of lubricating oil returned from the oil is basically a fixed flow method, using flow control components such as capillary tubes. control. [0003] In this way, the actual oil demand of the system cannot be well fed back. Under different load, pressure and temperature conditions, the requirements for the oil return of the lubricating oi...
Claims
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Application Information
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