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Control method of condensation fans of air-cooled air conditioning unit

A technology of condensing fan and control method, applied in heating and ventilation control systems, air conditioning systems, heating methods, etc., to achieve the effects of stable operation, avoiding unexpected shutdowns, and reducing complexity

Active Publication Date: 2019-10-15
GUANGDONG SHENLING ENVIRONMENT SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the current condensing fan is prone to occur in winter or transitional seasons, the present invention provides a new control method for the condensing fan of the air-cooled air-conditioning unit

Method used

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  • Control method of condensation fans of air-cooled air conditioning unit
  • Control method of condensation fans of air-cooled air conditioning unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a method for controlling a condensing fan of an air-cooled air-conditioning unit. The air-conditioning unit in this embodiment includes 6 condensing fans (axial fans), wherein the arrangement of the condensing fans is as follows figure 1 As shown, they are called fan ① to fan ⑥ respectively. The 6 axial flow fans are provided with 3 electrical wiring contacts, contact 1 controls the fan ①, contact 2 controls the fan ② and the fan ③, and the contact 3 controls the fan ④, the fan ⑤ and the fan ⑥.

[0062] By setting 3 electrical wiring contacts, the condensing fan is subdivided into 7 levels of control. In different operating conditions, the control methods are as follows. After the air-conditioning unit is running, check the condensing pressure P c :

[0063] (1) When P c 1 When the condensing fan is not turned on;

[0064] (2) When P 1 ≤P c 2 , turn on contact 1 and turn on 1 condensing fan;

[0065] (3) When P 2 ≤P c 3 When the contact...

Embodiment 2

[0071] A method for controlling a condensing fan of an air-cooled air-conditioning unit, the air-conditioning unit in this embodiment includes 8 condensing fans (axial fans), wherein the arrangement of the condensing fans is as follows figure 2 As shown, they are called fan ① to fan ⑧ respectively. 8 sets of axial flow fans are provided with 4 electrical wiring contacts, contact 1 controls fan ①, contact 2 controls fan ② and fan ③, contact 3 controls fan ④ and fan ⑤, and contact 4 controls fan ⑥, fan ⑦ and Fan ⑧.

[0072] By setting 4 electrical wiring contacts, the condensing fan is subdivided into 9 levels of control. In different operating conditions, the control methods are as follows. After the air-conditioning unit is running, check the condensing pressure P c :

[0073] (1) When P c 1 When the condensing fan is not turned on;

[0074] (2) When P 1 ≤P c 2 , turn on contact 1 and turn on 1 condensing fan;

[0075] (3) When P 2 ≤P c 3 When the contact 2 is turne...

Embodiment 3

[0083] A method for controlling a condensing fan of an air-cooled air-conditioning unit, the air-conditioning unit in this embodiment includes 8 condensing fans (axial fans), wherein the arrangement of the condensing fans is as follows figure 2 As shown, they are called fan ① to fan ⑧ respectively. 8 axial flow fans are provided with 4 electrical wiring contacts, contact 1 controls fan ①, contact 2 controls fan ② and fan ③, contact 3 controls fan ④, fan ⑤, fan ⑥ and fan ⑦, contact 4 controls Fan ⑧.

[0084] By setting 4 electrical wiring contacts, the condensing fan is subdivided into 9 levels of control. In different operating conditions, the control methods are as follows. After the air-conditioning unit is running, check the condensing pressure P c :

[0085] (1) When P c 1 When the condensing fan is not turned on;

[0086] (2) When P 1 ≤P c 2 , turn on contact 1 and turn on 1 condensing fan;

[0087] (3) When P 2 ≤P c 3 When the contact 2 is turned on, 2 condens...

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Abstract

The invention relates to the refrigeration technology field, and particularly discloses a control method of condensation fans of an air-cooled air conditioning unit. The air-cooled air conditioning unit comprises a plurality of the condensation fans. The condensation fans are first divided into groups, and the condensation fans in each group share the same control node, and then combined staged control is performed on each group of the condensation fans according to condensation pressure, and therefore by combining the different control nodes, the purpose of sequentially inputting or withdrawing one condensation fan stage by stage is achieved. By subdividing control of the condensation fans into multiple stages of control, the control method of the condensation fans of the air-cooled air conditioning unit can meet full year refrigeration requirements of the air-cooled air conditioning unit, reduces substantial change of blast capacity, slows down system fluctuation, and enables the air-cooled air conditioning unit to run stably.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a control method of a condensing fan of an air-cooled air-conditioning unit. Background technique [0002] Air-cooled air-conditioning units are cooling equipment widely used in industrial fields, and industrial cooling demand often has year-round characteristics, such as electrical rooms, technological computer rooms and other occasions. In the design of large air-cooled air-conditioning units, the outdoor condensing fan needs to be equipped with multiple axial fans. During the refrigeration operation in winter or transitional seasons, in order to maintain a certain high pressure, the condensing fan is prone to frequent start and stop, resulting in fluctuations in the parameters of the refrigeration system, and in severe cases, it will also trigger the shutdown protection of the unit. SUMMARY OF THE INVENTION [0003] Aiming at the problem that the current condensing fa...

Claims

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Application Information

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IPC IPC(8): F24F1/38F24F11/62F24F11/871F24F11/89F24F140/12
CPCF24F1/38F24F11/62F24F11/871F24F11/89F24F2140/12
Inventor 周金亮郭德朋郭建辉易子龙
Owner GUANGDONG SHENLING ENVIRONMENT SYST CO LTD
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