Control method for oil return and noise reduction of multi-split air conditioner, storage medium and multi-split air conditioner

A control method and multi-connection technology, which are applied in noise suppression, control input involving air characteristics, refrigeration and liquefaction, etc., can solve problems such as loud airflow in refrigeration operation, shorten time, improve user satisfaction, and user experience. good effect

Active Publication Date: 2021-08-06
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem solved by the present invention is that in the prior art, when the system is short of refrigerant after the oil return is completed, the air flow in the cooling operation is loud and the control fails, thereby improving customer experience and satisfaction
According to the change of the subcooling degree before and after the oil return, judge whether there is noise in the internal unit during the subsequent operation; correspondingly, after the oil return is completed, the gas bypass is opened to solve the problem of refrigeration when the system is short of refrigerant after the oil return is completed. The sound of running airflow is loud, and the problem of control failure can be improved to improve user satisfaction;

Method used

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  • Control method for oil return and noise reduction of multi-split air conditioner, storage medium and multi-split air conditioner
  • Control method for oil return and noise reduction of multi-split air conditioner, storage medium and multi-split air conditioner
  • Control method for oil return and noise reduction of multi-split air conditioner, storage medium and multi-split air conditioner

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Effect test

Embodiment 1

[0031] like figure 1 As shown, a control method for oil return and noise reduction of multi-connected units, the multi-connected units include an outdoor unit and a plurality of indoor units, some of the plurality of indoor units are in the normal power-on state, and the other part is in the standby or power-off state, so The oil return noise reduction control method includes: it is characterized in that the oil return control method includes the following steps:

[0032] S1: When the operating parameters of the multi-line unit meet the preset conditions, the oil return operation is performed;

[0033] After the multi-connector enters the cooling or dehumidification mode, it continuously obtains the indoor ambient temperature T ai , Outdoor ambient temperature T ao , every Δt 0 Get Exhaust High Pressure P d1 , Suction low pressure P s1 , the high pressure corresponds to the saturation temperature T pc1 , Condenser outlet tube temperature T def1 , record the running time...

Embodiment 2

[0041] like figure 2 As shown, a multi-line oil return noise reduction control method includes the following steps:

[0042] S1. Power on, multi-connection to judge whether to accept the "cooling or dehumidification mode" command;

[0043] For multi-connection, if the "cooling or dehumidification mode" command is received after starting up, go to step S2; if the "heating or ventilation mode" command is received, the system operates normally.

[0044] S2. Obtain the multi-line operation parameters and record the operation time t 1 ;

[0045] The operating parameters include indoor ambient temperature T ai , Outdoor ambient temperature T ao , every Δt 0 Get Exhaust High Pressure P d1 , Suction low pressure P s1 , the high pressure corresponds to the saturation temperature T pc1 , Condenser outlet tube temperature T def1 , the valve step value PMV of each internal unit 0 , the speed of the external fan is n, and the operating frequency of the compressor is f 2 . Pref...

Embodiment 3

[0057] like image 3 As shown, a multi-line oil return noise reduction control method includes the following steps:

[0058] S1. Turn on the machine and judge whether the multi-connector accepts the command of "cooling or dehumidification mode";

[0059] S2. Obtain the multi-line operation parameters and record the operation time t 1 ;

[0060] The operating parameters include indoor ambient temperature T ai , Outdoor ambient temperature T ao , every Δt 0 Get Exhaust High Pressure P d1 , Suction low pressure P s1 , the high pressure corresponds to the saturation temperature T pc1 , Condenser outlet tube temperature T def1 , the valve step value PMV of each internal unit 0 , the speed of the external fan is n, and the operating frequency of the compressor is f 2 . Preferably, the Δt 0 It is set according to experience value, for example, 4-8s.

[0061] Calculate the subcooling degree T at this time g11 , that is, before entering the oil return operation in cooling...

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Abstract

The invention provides a control method for oil return and noise reduction of a multi-split air conditioner, a storage medium and the multi-split air conditioner. The control method for oil return and noise reduction of the multi-split air conditioner comprises the steps that S1, when operation parameters of the multi-split air conditioner meet preset conditions, an oil return operation is carried out; S2, according to the degree of supercooling before and after oil return, whether noise reduction control is met or not is judged; and S3, an electromagnetic valve SV<1> of a noise reduction device is opened, so that a refrigerant circulates on one side of an outdoor unit. According to the control method for oil return and noise reduction of the multi-split air conditioner, the problems that after oil return, when a system lacks the refrigerant, the refrigeration operation airflow sound is large, and control fails can be effectively solved; pre-acting is carried out on the oil return process, so that the time by circulation of the refrigerant again is shortened; and meanwhile, judgement is carried out on the opportunity of quitting noise reduction control, quitting is carried out in different modes, and therefore the influence on normal operation of the multi-split air conditioner is reduced, and the user experience is good.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control method for oil return and noise reduction of multi-connectors, a storage medium and multi-connectors. Background technique [0002] The multi-connected air conditioner unit in the prior art is referred to as a multi-connected unit for short, and it includes one or more outdoor units, multiple indoor units connected in parallel, and two refrigerant circulation main pipes connecting each indoor unit and outdoor unit. With the improvement of living standards, multi-connection devices are more and more used in homes, offices and other places. People's attention to multi-split is no longer limited to temperature control effect or energy saving, and the noise of air conditioners has also attracted much attention. For the indoor unit, the noise sources are mainly: 1) the noise generated by the fan driven by the motor; 2) when the machine is running, the refri...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/64F24F11/65F24F11/84F24F11/88F24F13/24F25B31/00F24F110/10F24F110/12
CPCF24F11/30F24F11/64F24F11/65F24F11/84F24F11/88F24F13/24F25B31/004F24F2110/10F24F2110/12F24F2013/247
Inventor 肖旭东黄春陈东
Owner NINGBO AUX ELECTRIC
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