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Multi-split heating oil return control method and multi-split air conditioner

An oil return control, multi-connection technology, applied in the direction of compressors, refrigerators, refrigeration components, etc., can solve the problems of use experience influence, pressure relief, influence, etc., and achieve the effect of avoiding the problem of oil shortage

Active Publication Date: 2019-02-19
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will have an impact on the experience of users who are using the air conditioner heating function
Even if only a single indoor unit is controlled for oil return, there will be a pressure release phenomenon, which will affect other running indoor units

Method used

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  • Multi-split heating oil return control method and multi-split air conditioner
  • Multi-split heating oil return control method and multi-split air conditioner
  • Multi-split heating oil return control method and multi-split air conditioner

Examples

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no. 1 example

[0035] Please refer to figure 1 ,Such as figure 1As shown, the embodiment of the present invention provides a multi-connected machine heat oil return control method, which is applied to the multi-connected air conditioner 1 . The above multi-connection mechanism heat oil return control method is used to realize timely and targeted oil return during the heating process of the multi-connection air conditioner 1, and ensure that the compressor does not fail without affecting the normal use of the air conditioner. oil problem. Such as figure 1 As shown, the above-mentioned multiple mechanism thermal oil return control method includes the following steps:

[0036] Step S101, obtaining the continuous heating shutdown time of each indoor unit.

[0037] In the embodiment of the present invention, the above-mentioned multi-connected air conditioner 1 may include a plurality of indoor units, and when the multi-connected air conditioner 1 is running in the heating mode, the heating s...

no. 2 example

[0072] Please refer to Figure 4 , the embodiment of the present invention also provides a multi-connected air conditioner 1 . The multi-connected air conditioner 1 may include: an acquisition unit 2 and a control unit 3 , and the acquisition unit 2 is electrically connected to the control unit 3 . Optionally, the acquisition unit 2 may include a timer, and the control unit 3 may include a main control CPU.

[0073] Optionally, the acquisition unit 2 is configured to acquire the continuous heating shutdown time of each indoor unit.

[0074] Optionally, the above-mentioned control unit 3 is configured to control the target indoor unit to gradually open the corresponding expansion valve from the shut-down opening degree when there is a target indoor unit whose heating shutdown duration exceeds a preset duration among the indoor units. Big.

[0075] Preferably, after the expansion valve corresponding to the target indoor unit reaches a preset first opening degree, the control ...

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Abstract

The invention provides a multi-split heating oil return control method and a multi-split air conditioner. The multi-split heating oil return control method comprises the steps that the continuous heating halt duration of each indoor unit is obtained; when the target indoor unit with the heating halt duration exceeding the preset time duration exists in the indoor units, the target indoor unit is controlled to gradually increasing the opening of a corresponding expansion valve from the halt opening; and after the expansion valve corresponding to the target indoor unit reaches the preset first opening, the opening of the expansion valve is controlled to be gradually decreased. By means of the multi-split heating oil return control method, in the multi-split air conditioner heating operationprocess, oil return can be achieved in time in a targeted mode, and the problem that a compressor is lack of oil is avoided; the pressure relief phenomenon is effectively prevented from being producedin the oil return process, and the operation effects of other indoor units operated normally are ensured.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a multi-connection mechanism heat return oil control method and a multi-connection mechanism air conditioner. Background technique [0002] Lubricating oil is an integral part of air conditioner compressors. However, during the operation of the air conditioner, the lubricating oil tends to leave the compressor with the refrigerant. If there is too much lubricating oil leaving the compressor and cannot return to the compressor in time, it will cause abnormal operation or even damage of the compressor. Especially in multi-split air conditioner products, it is very common that a large amount of lubricating oil stays outside the compressor. [0003] In order to improve this problem, most multi-split air conditioners will set the oil return mode. However, after entering the oil return mode, all indoor machines of the multi-split air conditioner will enter the cooling worki...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B41/06F25B49/02F25B41/31
CPCF25B31/004F25B49/02F25B2600/2513F25B41/31
Inventor 李兆东章秋平刘合心黄春
Owner NINGBO AUX ELECTRIC
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