An air-conditioning control method, a multi-connected air-conditioning system, and an air-conditioner

A control method and technology for air conditioners, applied in refrigerators, refrigerants, refrigeration components, etc., can solve problems such as danger, large opening of electronic expansion valve, and liquid return of the unit, so as to solve the problem of liquid return, improve stability, and improve The effect of reliability

Active Publication Date: 2020-10-27
NINGBO AUX ELECTRIC
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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 an air conditioning control method to solve the problem that the opening of the electronic expansion valve is too large when the refrigerant is charged, which may easily cause the unit to return liquid and cause danger.

Method used

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  • An air-conditioning control method, a multi-connected air-conditioning system, and an air-conditioner
  • An air-conditioning control method, a multi-connected air-conditioning system, and an air-conditioner
  • An air-conditioning control method, a multi-connected air-conditioning system, and an air-conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, an air-conditioning control method includes the following steps:

[0034] S1. After the air conditioner is running, obtain the setting information of the operating mode and operate accordingly;

[0035] S2. Real-time detection of operating parameters in the air conditioner system, the operating parameters include condensing pressure, evaporation pressure, opening of the electronic expansion valve, liquid pressure in front of the electronic expansion valve and temperature of the liquid pipe; obtain refrigeration parameters according to the operating parameters , the refrigeration parameters include the temperature corresponding to the condensation pressure, the temperature corresponding to the evaporation pressure, the opening degree of the electronic expansion valve and the subcooling degree of the liquid pipe;

[0036] Among them, the corresponding pressure temperature is found through the implemented condensing pressure and evaporating pres...

Embodiment 2

[0043] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment is applied to a multi-connected air conditioner, and the above step S3 specifically determines the grade of the refrigerant according to the obtained system corresponding parameters, specifically including the following steps,

[0044] S31. When the following four conditions are met at the same time:

[0045] The average opening of the electronic expansion valve meets more than 350 steps, and the temperature corresponding to the condensing pressure≤T a +10, the temperature corresponding to the evaporation pressure≤T b -12, the subcooling degree of the liquid pipe is less than or equal to 2°C,

[0046] Then it is determined that the refrigerant charge level of the system is: less.

[0047] Wherein, the opening degree of the valve is the characteristic value of the electronic expansion valve, and the specification of the electronic expansion valve shall prevail. T...

Embodiment 3

[0060] Such as image 3 , 4 As shown, the difference between this embodiment and Embodiment 2 is that the above step S4 is specifically based on the 4-level judgment of the refrigerant charging amount, and the minimum opening of the throttling electronic expansion valve is automatically corrected, specifically including the following steps,

[0061] S41. When it is determined that the level of refrigerant charge in the system is: small.

[0062] Adjustment of the minimum opening of the electronic expansion valve of each indoor unit: Step A for upward adjustment. A is in the range of [5, 25], preferably A is 10.

[0063] S42. When it is determined that the level of the refrigerant charging amount of the system is: appropriate.

[0064] The minimum opening of the electronic expansion valve of each indoor unit is not adjusted.

[0065] S43. When it is determined that the level of the refrigerant charging amount of the system is: more.

[0066] Adjustment of the minimum openi...

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Abstract

The invention provides an air conditioner control method, a multi-split air conditioning system and an air conditioner. The control method comprises the following steps that operation parameters of anair conditioner system are detected in real time, the operation parameters comprise condensation pressure, evaporation pressure, opening degree of an electronic expansion valve, and liquid pressure and temperature of a liquid tube before the electronic expansion valve; the refrigeration parameters are obtained according to the operation parameters, the refrigeration parameters comprise the temperature corresponding to the condensation pressure, the temperature corresponding to the evaporation pressure, the opening degree of the electronic expansion valve and supercooling degree of the liquidtube; and according to the obtained refrigeration parameters, levels of filling quantity of a refrigerant are judged, and the minimum opening degree of the throttling electronic expansion valve is correspondingly and automatically corrected according to the levels of the filling quantity of the refrigerant. According to the control method, the minimum opening degree of the electronic expansion valve is adjusted according to the filling quantity of the refrigerant, liquid return risk can be effectively reduced, and reliability of a unit is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, a multi-connected air conditioner system and an air conditioner. Background technique [0002] In the existing inverter air conditioners, especially in the multi-split system, the throttling parts are all controlled by electronic expansion valves. Since the electronic expansion valve is unstable when the opening is low, each manufacturer sets a minimum opening during control. This minimum opening is generally fixed, and it is applicable when the refrigerant charge is appropriate or too small. However, it is inappropriate when the refrigerant is overcharged. The unit may still have a large flow rate when the electronic expansion valve is opened to the minimum opening, which will cause the unit to return liquid, and there is a risk in reliability. Contents of the invention [0003] In view of this, the present invention aims to propose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B45/00F24F11/30
CPCF25B45/00F25B2345/001F25B2345/003F24F11/30
Inventor 任艺璇袁双全李存永
Owner NINGBO AUX ELECTRIC
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