An air-conditioning control system and multi-pipe group air-conditioning

Abstract

The invention discloses an air conditioner control system and a multi-tube-nest air conditioner. The air conditioner control system comprises an outdoor unit assembly and two or more groups of indoor units. Each group of indoor units communicate with the outdoor unit assembly through a refrigerant pipeline. Confluence pipeline sections of the refrigerant pipelines where the corresponding indoor units are located are provided with throttle valves which are connected in parallel. Check valves are arranged between the refrigerant pipelines where the indoor units are located and the adjacent throttle valve pipelines, and the check valves are used for controlling the corresponding indoor units to be connected with the system to work or not. Intersecting pipeline sections of the refrigerant pipelines of the indoor units are connected with the throttle valves which are connected in parallel. Because the pipelines are connected into the multiple throttle valves in parallel, the controllable adjustment range of flow control amounts to the sum of the control sections of all the throttle valves connected in parallel, and the air conditioner control system can be fully adapted to the work demand that multiple indoor units are connected in parallel; when the number of the working indoor units connected into the system is small, a part of the throttle valves connected in parallel can be directly closed, and only one independent throttle valve is used for connection control; and therefore, the range of the refrigerant flow adjusting area controlled by the throttle valves and the control accuracy are guaranteed.

Description

technical field [0001] The present invention relates to the technical field of air-conditioning equipment, more specifically, to an air-conditioning control system, and to a multi-pipe group air-conditioner. Background technique [0002] With the increasing market share of household air conditioners, the design concept of household air conditioners is more and more focused on convenience, so multi-tube air conditioning systems have become the preferred choice for household installations. However, it is difficult for the multi-pipe air-conditioning system to balance the flow control of multiple sets of indoor unit pipelines with the throttling effect of the system. Specifically: because the outdoor units share the same system, severe flow bias is often prone to occur when multiple indoor units are running at the same time The problem. [0003] In addition, the common multi-pipe air-conditioning systems currently on the market are generally designed to adopt the control schem...

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Problems solved by technology

[0003] In addition, the common multi-pipe air-conditioning systems currently on the market are generally designed to adopt the control scheme of capillary throttling + expansion valve average flow rate. The throttling device that mainly plays the role of throttling is capillary. Changing, the air conditioner cannot adapt to the operation of different temperature fields, and it is easy to cause problems such as insufficient flow of the internal unit, excessive circulation of low-temperature refrigerant, and ineffective internal capacity, etc.

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