Auxiliary oil return control method of multi-split air conditioner, auxiliary oil return device of compressor and multi-split air conditioner

An oil return control, multi-connection technology, applied in compressors, control inputs involving air characteristics, heating and ventilation control systems, etc., can solve problems such as slow oil return

Active Publication Date: 2021-12-03
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem solved by the invention is the technical problem of slow oil return caused by only relying on the return air pipeline for oil return

Method used

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  • Auxiliary oil return control method of multi-split air conditioner, auxiliary oil return device of compressor and multi-split air conditioner
  • Auxiliary oil return control method of multi-split air conditioner, auxiliary oil return device of compressor and multi-split air conditioner
  • Auxiliary oil return control method of multi-split air conditioner, auxiliary oil return device of compressor and multi-split air conditioner

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see figure 2 , which is a schematic flowchart of a multi-line auxiliary oil return control method provided in Embodiment 1 of the present invention. The multi-line includes a compressor 10, an auxiliary oil return branch 30 and a gas-liquid separator 40; wherein the auxiliary oil return branch 30 is connected between the compressor 10 and the gas-liquid separator 40, combined Figure 3-Figure 4 , the auxiliary oil return control method includes, for example:

[0039] S1: controlling the multi-connection to start and run;

[0040] S2: Adjust the oil return volume of the auxiliary oil return branch (30) according to the different operation modes of the multi-line.

[0041] Preferably, the auxiliary oil return control method includes, for example: obtaining the real-time operating frequency of the compressor 10, the suction temperature of the compressor 10, the oil return temperature of the auxiliary oil return branch 30, and the relationship between the suction tempera...

Embodiment 2

[0058] see figure 1 , which is a schematic connection diagram of a compressor auxiliary oil return device 100 provided in Embodiment 2 of the present invention. The compressor auxiliary oil return device 100 includes, for example, a compressor 10, a gas-liquid separator 40 and an air return pipeline 20. The air return pipeline 20 is used to connect the compressor 10 and the gas-liquid separator 40, so that it is stored in the gas-liquid separator 40 The lubricating oil is returned to the compressor 10 through the air return pipeline 20, so that the compressor 10 can be supplemented by returning oil during operation.

[0059] In a specific embodiment, combined with the actual operating conditions of the compressor 10, generally, the lubricating oil will be discharged from the output end of the compressor 10 and recirculated back to the input end of the compressor. Specifically, when the multi-line When the control is operated at a low frequency, it will lead to slow oil return...

Embodiment 3

[0066] Embodiment 3 of the present invention provides a multi-connection unit, which can run the auxiliary oil return control method as described in the first embodiment above; or, the multi-connection unit includes the compressor auxiliary oil return control method as described in the second embodiment above. Oil unit 100.

[0067] Preferably, an auxiliary oil return assembly is provided on the auxiliary oil return branch 30 , wherein the auxiliary oil return assembly is used to control and adjust the opening of the oil return opening of the auxiliary oil return branch 30 .

[0068] For example, in combination with the actual oil return situation, when the amount of oil returned from the air return pipeline 20 to the compressor 10 is sufficient, the opening of the oil return opening can be closed or kept at a small opening; otherwise , then increase the opening of the oil return opening, so that the auxiliary oil return branch 30 plays the role of auxiliary oil return, thereb...

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Abstract

The invention provides an auxiliary oil return control method of a multi-split air conditioner, an auxiliary oil return device of a compressor and the multi-split air conditioner. According to the auxiliary oil return control method of the multi-split air conditioner, the multi-split air conditioner comprises a compressor, an auxiliary oil return branch and a gas-liquid separator, wherein the auxiliary oil return branch is connected between the compressor and the gas-liquid separator, and the auxiliary oil return control method comprises the following steps that the multi-split air conditioner is controlled to start running; and the oil return quantity of the auxiliary oil return branch is adjusted according to different operation modes of the multi-split air conditioner. The technical problem that oil return is slow due to the fact that oil return is conducted only through an air return pipeline is solved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a multi-line auxiliary oil return control method, a compressor auxiliary oil return device, and a multi-line oil return device. Background technique [0002] At present, an air return pipeline is generally provided between the compressor and the gas-liquid separator, through which the oil is returned to the compressor. However, the oil return rate of multi-connected air conditioners is often affected by external factors. For example, because the connecting pipe between the indoor unit and the outdoor unit is long and the installation scene is complicated, when the multi-connected air conditioner operates at a low frequency, the The oil return of the compressor is slow. For example, in a unit time, the amount of lubricating oil discharged from the output port of the compressor is greater than the amount of oil returned, which causes the oil level in the compressor...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F25B31/00F25B43/02F24F110/10
CPCF24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F25B31/004F25B43/003F25B43/02F24F2110/10Y02B30/70
Inventor 李理科刘合心陈华
Owner NINGBO AUX ELECTRIC
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