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A control method, storage medium and multi-line oil return noise reduction

A control method and multi-connection technology, applied in the direction of noise suppression, control input related to air characteristics, refrigeration and liquefaction, etc., can solve the problem of loud air flow in refrigeration operation, shorten time, improve user satisfaction, and user experience good effect

Active Publication Date: 2022-04-22
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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  • A control method, storage medium and multi-line oil return noise reduction
  • A control method, storage medium and multi-line oil return noise reduction
  • A control method, storage medium and multi-line oil return noise reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as 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 t...

Embodiment 2

[0041] Such as 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 . P...

Embodiment 3

[0057] Such as 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 cool...

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Abstract

The present invention provides a control method, a storage medium, and a multi-line oil return noise reduction control method, and the multi-line oil return noise reduction control method includes: S1: when the operating parameters of the multi-line machine meet the preset conditions, return Oil operation; S2: According to the subcooling degree before and after the oil return, it is judged whether the noise reduction control is satisfied; S3: Open the solenoid valve SV of the noise reduction device 1 , so that the refrigerant circulates on the side of the outdoor unit. The multi-line oil return and noise reduction control method of the present invention can effectively solve the problem of loud air flow in refrigeration operation and control failure when the system lacks refrigerant after the oil return; the pre-action of the oil return process shortens the time required for the recirculation of the refrigerant Time; At the same time, the timing of exiting the noise reduction control is judged, and the exit is divided into different modes to reduce the impact on the normal operation of the multi-connection, 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 indoor units, the noise sources are mainly: 1) the noise generated by the fan driven by the motor; 2) when the machine is running, the refriger...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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