Multi-split electronic expansion valve opening control method, multi-split electronic expansion valve opening adjusting device and air conditioning system

An electronic expansion valve and control method technology, applied in the field of multi-line electronic expansion valve opening control method, adjustment device, and air conditioning system, can solve the problem of inability to realize refrigerant, and achieve the effect of eliminating the phenomenon of bias flow and realizing the ability balance.

Active Publication Date: 2021-05-14
NINGBO AUX ELECTRIC +1
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Problems solved by technology

[0004] The problem solved by the present invention is that in the existing multi-connected air-conditioning system, it is impossible to realize the uniform distribution of refrigerant and the technical problem of the capacity balance between each internal unit

Method used

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  • Multi-split electronic expansion valve opening control method, multi-split electronic expansion valve opening adjusting device and air conditioning system

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Embodiment Construction

[0050] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] This embodiment provides a multi-connected electronic expansion valve opening control method, which is applied to a multi-connected air conditioning system with at least two internal units, such as figure 1 shown, including steps:

[0052] S102 Acquire the average tube temperature difference between the single average tube temperature of a single internal unit and the total average tube temperature of multiple internal units;

[0053] Among them, this step includes:

[0054] 1) The formula for calculating the average tube temperature of a single unit is: T avi =(x*T cii +y*T cmi +z*T coi ) / 3;

[0055] 2) The formula for calculating the total average tube temperature is: T av =∑T avi / m, m≥2;

[0056] 3) The formula for calc...

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Abstract

The invention relates to the technical field of air conditioners, in particular to a multi-split electronic expansion valve opening control method, a multi-split electronic expansion valve opening adjusting device and an air conditioning system. The multi-split electronic expansion valve opening control method comprises the steps that the average pipe temperature difference value between the single average pipe temperature of a single indoor unit and the total average pipe temperature of multiple indoor units is obtained; the superheat degree difference value between the actual superheat degree and the preset superheat degree of the single indoor unit is obtained; and according to the average pipe temperature difference value and the superheat degree difference value, the target adjusting valve step of the electronic expansion valve is determined. The opening degree of the electronic expansion valve can be accurately controlled, the bias flow phenomenon of the refrigerant amount is reduced or even eliminated, and capacity balance among indoor units is achieved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling the opening of a multi-connected electronic expansion valve, an adjusting device and an air conditioning system. Background technique [0002] A multi-connected air conditioning system generally consists of one outdoor unit and n (n≥2) indoor units. The outdoor unit is connected to the indoor unit through piping and branch pipes, and can control the cooling or heating of the indoor unit. The multi-split air-conditioning system is popular among users for its high comfort and convenient installation. However, in the actual use process, due to the fact that the branch pipe is not placed horizontally, the straight pipe section before and after the branch pipe is too short (less than 0.5m), and the length of the pipelines from the branch pipe to different indoor units is different (some indoor units are far from the outdoor unit, Need to add connecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/84F24F3/00F25B41/34F25B49/00
CPCF24F11/84F24F3/00F25B49/00Y02B30/70
Inventor 刘永超刘合心张稳程向欣
Owner NINGBO AUX ELECTRIC
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