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Control method for indoor unit valve of multi-split air conditioner system

A technology of multi-connected air conditioners and control methods, applied in heating and ventilation control systems, heating and ventilation safety systems, mechanical equipment, etc., can solve problems such as dirty blockage of external units, insufficient refrigerant installation environment, frequent protection and shutdown of internal unit valves, etc. , to achieve the effect of reducing the probability of exhaust protection shutdown

Active Publication Date: 2019-03-08
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose a control method for the internal unit valve of the multi-connected air-conditioning system to solve the problem in the prior art that the internal unit valve cannot be initialized due to dirty blockage of the external unit, insufficient refrigerant or harsh installation environment. Very prone to technical problems of frequent protection shutdowns

Method used

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  • Control method for indoor unit valve of multi-split air conditioner system

Examples

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Embodiment 1

[0029] Such as figure 1 , the present embodiment provides a method for controlling an internal valve of a multi-connected air-conditioning system, which includes the following steps:

[0030] Step S1, obtain the standard exhaust temperature T 0 , start the air conditioner, and detect the outdoor ambient temperature T out , if T out >A, the internal machine valve is opened with the original opening degree P 0 run;

[0031] Step S2, when the operation in step S1 ends, detect the actual exhaust gas temperature T 1 ;

[0032] Step S3, the actual exhaust temperature T of step S2 1 With step S1 standard exhaust temperature T 0 are compared when T 1 ≥T 0 , the initialization opening degree P of the internal machine valve at the next start-up 1 Fitting correction, increasing the opening degree of the internal machine valve increases the opening degree of the internal machine valve when starting up next time; when T 1 0 , the opening of the internal unit valve will remain un...

Embodiment 2

[0038] The present embodiment is the application instance of embodiment 1, specifically as follows:

[0039] In this example, it is assumed that the ambient temperature T out >48°C, this embodiment is a method for controlling the internal valve of a multi-connected air-conditioning system, which includes the following steps:

[0040] Step S1, obtain the standard exhaust temperature T 0 is 105°C, start two indoor air conditioners, and detect the outdoor ambient temperature T out at 55°C, the valve of the internal machine takes the original opening degree P 0 Run for 2 minutes at 160, that is, the internal machine valve is opened at the original opening degree P 0 After running for 2 minutes, the internal machine valve starts to automatically adjust;

[0041] Step S2, when the operation in step S1 ends, detect the actual exhaust gas temperature T 1 is 120°C;

[0042] Step S3, the actual exhaust temperature T of step S2 1 With step S1 standard exhaust temperature T 0 are ...

Embodiment 3

[0044] The present embodiment is the application instance of embodiment 1, specifically as follows:

[0045] In this example, it is assumed that the ambient temperature T out >45°C, this embodiment is a method for controlling the internal valve of a multi-connected air-conditioning system, which includes the following steps:

[0046] Step S1, obtain the standard exhaust temperature T 0 is 100°C, start two indoor air conditioners, and detect the outdoor ambient temperature T at this time out at 50°C, the valve of the internal machine takes the original opening degree P 0 Run for 1min at 190, that is, the internal machine valve is opened at the original opening degree P 0 After running for 1 minute, the internal machine valve starts to automatically adjust;

[0047] Step S2, when the operation in step S1 ends, detect the actual exhaust gas temperature T 1 90°C;

[0048] Step S3, the actual exhaust temperature T of step S2 1 With step S1 standard exhaust temperature T 0 T...

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Abstract

The invention provides a control method for an indoor unit valve of a multi-split air conditioner system, and relates to the technical field of air conditioner control. The method comprises the stepsthat the standard exhaust temperature T0 is obtained, an air conditioner is started, the outdoor environment temperature Tout is detected, and the indoor unit valve runs with the original aperture P0;after running is over, the actual exhaust temperature T1 is detected; the actual exhaust temperature T1 is compared with the standard exhaust temperature T0, when T1 is larger than or equal to T0, fitting correction is conducted on the initialized aperture P1 of the indoor unit valve during next-time start, and the aperture of the indoor unit valve during next-time start is increased; and when T1is smaller than T0, the aperture of the indoor unit valve during next-time start is kept unchangeable. Through the exhaust temperature and the outdoor temperature, the initialized aperture of the indoor unit valve is corrected and controlled, and the phenomenon that during next-time start, the exhaust temperature is too high in the indoor unit valve initializing process, protection shutdown happens is avoided; and during single-machine start, after protection shutdown happens, the initialized aperture of the indoor unit valve can be corrected and controlled, and the next-time shutdown probability is reduced.

Description

technical field [0001] The invention relates to the technical field of air-conditioning control, in particular to a method for controlling an internal valve of a multi-connected air-conditioning system. Background technique [0002] At present, with the improvement of air conditioner energy efficiency and comfort requirements, because the electronic expansion valve can realize variable flow and throttling according to the actual load changes of the air conditioner, so as to meet the requirements of improving air conditioner energy efficiency and comfort. Therefore, more and more manufacturers favor An electronic expansion valve is used to throttle flow. At present, under the high-temperature working conditions of the multi-connected air-conditioning system that uses electronic expansion valves to throttle, the initial opening of the electronic expansion valve is fixed after the refrigeration is turned on. During the initialization process, frequent protection shutdowns are ...

Claims

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Application Information

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IPC IPC(8): F24F11/84F24F110/12F24F140/20
CPCF24F11/84F24F2110/12F24F2140/20
Inventor 陈东黄春刘合心任小辉陈华
Owner NINGBO AUX ELECTRIC
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