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Automatic adjustment method and system for hydraulic balance of central air-conditioning system

A hydraulic balance and centralized air-conditioning technology, which is applied in the field of air-conditioning adjustment, can solve the problems of uneven heating and cooling in public areas, hydraulic imbalance of the centralized air-conditioning water system, and large gap in design flow, so as to save labor costs and simplify cumbersome steps Effect

Inactive Publication Date: 2020-11-10
SICHUAN INSITITUTE OF BUILDING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the centralized air-conditioning system has been widely used in various public buildings, but after operation, the hydraulic imbalance of the centralized air-conditioning water system often occurs, and the actual flow of each pipeline is quite different from the designed flow, resulting in uneven cooling and heating of the air-conditioning terminals on the same floor. The phenomenon of large temperature gradients on different floors
[0003] Especially in the public areas of some commercial buildings, the central air-conditioning system used in them only did a trial run of the air-conditioning system when the project was completed, and most of them did not adjust the hydraulic balance of the air-conditioning water system during the actual operation of the building.
Therefore, in the cooling and heating season, there are often uneven heating and cooling in the public areas of each floor, which leads to complaints from merchants or customers
Under the advice of a third-party energy-saving consulting unit, a small number of public building owners have gradually started to adjust the hydraulic balance of the air-conditioning water system, but still use traditional manual adjustment, and it is difficult to achieve a dynamic balance of the air-conditioning water system

Method used

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  • Automatic adjustment method and system for hydraulic balance of central air-conditioning system
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  • Automatic adjustment method and system for hydraulic balance of central air-conditioning system

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Embodiment 1

[0050]A method for automatically adjusting the hydraulic balance of a centralized air-conditioning system, comprising a multi-level pipeline mechanism, each pipeline of each level of pipeline mechanism is connected to a plurality of parallel lower-level pipelines, and the adjustment method includes the following steps:

[0051] S1. In the upper-level pipeline mechanism, select the pipeline with the largest flow ratio, and select the lower-level pipeline mechanism connected to this pipeline;

[0052] S2. In the lower-level pipeline mechanism, repeat the step S1 until reaching the lowest-level lower-level pipeline mechanism;

[0053] S3. In the pipeline mechanism at this level, adjusting the flow ratio of each pipeline specifically includes the following steps:

[0054] S31. Select the pipeline with the smallest flow ratio among the multiple pipelines of the pipeline mechanism as the reference value;

[0055] S32. Select a pipeline other than the reference value, and adjust the...

Embodiment 2

[0066] A centralized air conditioning system hydraulic balance automatic adjustment system, such as Figure 1-5 As shown, the system includes a multi-stage pipeline mechanism, each pipeline of the upper-level pipeline mechanism is connected to multiple parallel pipelines of the lower-level pipeline mechanism, and also includes a flow meter 1, a regulating valve 2 and a centralized controller 3 .

[0067] Both the flow meter 1 and the regulating valve 2 are installed on each pipeline of the multi-stage pipeline mechanism, and both are connected with the centralized controller 3 .

[0068] The flowmeter 1 includes: a button module 101, which is used to input the design flow of the pipeline; a processor 102, connected to the button module 101, receives the actual flow signal of the pipeline, calculates the ratio of the actual flow to the design flow, and transmits the ratio to the centralized control Device 3; a display module 103, connected to the processor 102, displays the rat...

Embodiment 3

[0086] In this embodiment, the method for automatically adjusting the hydraulic balance of the central air-conditioning system will be described in detail in combination with Embodiment 1 and Embodiment 2.

[0087] In this embodiment, the adjustment method is adapted to the three-level pipeline mechanism. The first-level pipeline mechanism is a first pipeline directly connected to the air-conditioning system, that is, the main water outlet pipe, and the second-level pipeline mechanism is three branches of the first pipeline. The second pipe, the third pipe mechanism are three third pipes branched from each second pipe, a total of nine pipes, such as figure 2 shown. On each pipeline, a flowmeter 1 and a regulating valve 2 are installed, and both the flowmeter 1 and the regulating valve 2 are connected to the centralized controller 3, and the centralized controller 3 receives the uploaded information of the flowmeter 1 and controls the flow of the regulating valve 2 run.

[0...

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Abstract

The invention discloses an automatic adjustment method and system for hydraulic balance of a central air-conditioning system. According to the adjustment method, the requirements are achieved throughthe grading adjustment and adjustment of the flow ratio of each pipeline, the tedious steps of conventional manual hydraulic balance adjustment are simplified, and the manual expenditure for the adjustment of the hydraulic balance of an air conditioner is saved for a proprietor; and in addition, the hydraulic imbalance phenomenon of an air conditioner water system is avoided, the problem of complaints of tenants due to uneven heat and cold of the air conditioner tail end is solved, and a key effect is achieved for energy conservation of air conditioner operation of the proprietor. According tothe adjustment system, the flow ratio of the pipeline is calculated through flow meters on the pipelines and transmitted the flow ratio to a centralized controller, and the centralized controller processes, analyzes and controls adjusting valves of the pipelines to adjust the water flow of the pipelines, so that the flow ratio of the pipelines meets the requirement, and hydraulic balance of the centralized air conditioner water system is achieved. Meanwhile, the flow meters can display and transmit the flow ratio of the pipeline flow of the air conditioner water system, and the problem that an existing pipeline flow meter of the air conditioner water system cannot display the flow ratio is solved.

Description

technical field [0001] The invention relates to the field of air conditioning adjustment, in particular to an automatic adjustment method and system for hydraulic balance of a centralized air conditioning system. Background technique [0002] At present, the centralized air-conditioning system has been widely used in various public buildings, but after operation, the hydraulic imbalance of the centralized air-conditioning water system often occurs, and the actual flow of each pipeline is quite different from the designed flow, resulting in uneven cooling and heating of the air-conditioning terminals on the same floor. The phenomenon of large temperature gradients on different floors. [0003] Especially in the public areas of some commercial buildings, the central air-conditioning system used in the project was only tested for trial operation when the project was completed. During the actual operation of the building, most of them did not adjust the hydraulic balance of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F5/00F24F11/54F24F11/62F24F11/83F24F11/84F24F11/89F24F140/20
CPCF24F5/0003F24F11/54F24F11/62F24F11/83F24F11/84F24F11/89F24F2140/20
Inventor 高波倪吉许川于佳佳杨晓娇苏英杰陈红林
Owner SICHUAN INSITITUTE OF BUILDING RES
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