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A control method for an internal unit valve of a multi-connected air-conditioning system

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

Active Publication Date: 2019-08-30
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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  • A control method for an internal unit valve of a multi-connected air-conditioning 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

Disclosed is a control method for an indoor unit valve of a multi-split air-conditioning system. The method comprises: acquiring a standard exhaust temperature T0, starting an air conditioner, detecting an outdoor ambient temperature Tout, and running an indoor unit valve with an original opening P0; after the running ends, detecting an actual exhaust temperature T1; comparing the actual exhaust temperature T1 with the standard exhaust temperature T0; when T1 ≥T0, performing fitted-modification on an initialized opening degree P1 of the indoor unit valve when the air conditioner is started next time, and increasing the opening of the indoor unit valve when the air conditioner is started next time; and when T1＜T0, keeping the opening of the indoor unit valve unchanged when the air conditioner is started next time. According to the method, modification control is carried out on the initialized opening of the indoor unit valve by means of the exhaust temperatures and the outdoor temperature to avoid causing protect stop due to a too high exhaust temperature in an initializing process of the indoor unit valve when the air conditioner is started next time; moreover, when a unit is started, if protect stop occurs, modification control can also be carried out on the initialized opening of the indoor unit valve to reduce the probability of stopping next time.

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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Patent Type & Authority Patents(China)
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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