A multi-connection machine heat oil return control method and a multi-connection air conditioner

A technology of oil return control and multi-connection, applied in the direction of refrigerators, compressors, refrigeration components, etc., can solve problems such as impact on user experience, pressure relief, and impact, and achieve the effect of avoiding oil shortage problems

Active Publication Date: 2019-11-05
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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  • A multi-connection machine heat oil return control method and a multi-connection air conditioner
  • A multi-connection machine heat oil return control method and a multi-connection air conditioner
  • A multi-connection machine heat oil return control method and a multi-connection air conditioner

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Effect test

no. 1 example

[0035] Please refer to figure 1 ,Such as figure 1 As shown, the embodiment of the present invention provides a multi-connection mechanism hot oil return control method, which is applied to a multi-connection air conditioner 1. The above-mentioned multi-connection mechanism heat oil return control method is used to realize timely and targeted oil return during the heating process of the multi-connected air conditioner 1, so as to ensure that the compressor does not have a shortage while not affecting the user's normal use of the air conditioner. The oil problem. Such as figure 1 As shown, the above-mentioned multiple mechanism hot oil return control method includes the following steps:

[0036] Step S101: Obtain the continuous heating shutdown duration of each indoor unit.

[0037] In the embodiment of the present invention, the above-mentioned multi-line air conditioner 1 may include multiple indoor units, and when the multi-line air conditioner 1 is operating in the heating mode,...

no. 2 example

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

[0073] Optionally, the aforementioned collection unit 2 is used to obtain the continuous heating shutdown duration of each indoor unit.

[0074] Optionally, the aforementioned control unit 3 is configured to control the target indoor unit to gradually open the corresponding expansion valve from the shutdown opening when there is a target indoor unit whose heating shutdown duration exceeds a preset duration in the indoor unit Big.

[0075] Preferably, after the expansion valve corresponding to the target indoor unit reaches the preset first opening degree, the control unit 3 is specifically conf...

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Abstract

The invention provides a multi-connection mechanism heat oil return control method and a multi-connection mechanism air conditioner. Wherein, the above-mentioned multi-connection mechanism thermal oil return control method includes obtaining the continuous heating shutdown duration of each indoor unit; when there is a target indoor unit whose heating shutdown duration exceeds the preset duration, the control The target indoor unit gradually opens the corresponding expansion valve from shutdown; after the expansion valve corresponding to the target indoor unit reaches a preset first opening degree, controls the expansion valve to gradually close. The heat oil return control method of the multi-unit air conditioner according to the present invention can return oil in a timely and targeted manner during the heating operation of the multi-unit air conditioner, so as to avoid the oil shortage problem of the compressor. It can also effectively avoid pressure relief during the oil return process and ensure the operation effect of other normally used indoor units.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a multi-link mechanism hot oil return control method and a multi-link air conditioner. Background technique [0002] Lubricating oil is an indispensable part of air conditioning compressors. However, during the operation of the air conditioner, lubricating oil tends to leave the compressor with the refrigerant. If the lubricating oil leaving the compressor is too much and cannot return to the compressor in time, the compressor will operate abnormally or even be damaged. Especially in multi-line air-conditioning products, it is very common that a large amount of lubricating oil stays outside the compressor. [0003] In order to improve this problem, most of the multi-line air-conditioning products will set the oil return mode. However, after entering the oil return mode, all the indoor opportunities of the multi-line air conditioner enter the cooling working state to perform ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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