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Control method for preventing blockage on water side of plate heat exchanger of air conditioner and air conditioner

A technology of a plate heat exchanger and a control method, which is applied in space heating and ventilation, heating and ventilation control systems, heating methods, etc., can solve problems such as easy blockage of the water side of the plate heat exchanger, and achieve reliable and economical operation sex high effect

Active Publication Date: 2021-11-16
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention discloses a control method and an air conditioner for preventing blockage of the water side of the plate heat exchanger of the air conditioner, so as to at least solve the problem of easy blockage of the water side of the plate heat exchanger

Method used

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  • Control method for preventing blockage on water side of plate heat exchanger of air conditioner and air conditioner

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Embodiment 1

[0038] In this embodiment, a control method for preventing the water side blockage of the air-conditioning plate heat exchanger is provided, the control method includes:

[0039] S1. Detect the water outlet flow of the water side outlet of the plate heat exchanger;

[0040] S2. Perform a preliminary judgment on blockage of the plate heat exchanger according to the outlet water flow rate. If the preliminary judgment result of clogging is that there is a risk of clogging, then perform step S3; if the result of the preliminary judgment on clogging is that there is no risk of clogging, then re-execute step S1;

[0041] S3. According to the water inlet pressure of the water side inlet of the plate heat exchanger, the clogging is qualitatively judged. If the clogging qualitative judgment result is that there is clogging, then the water delivery flow rate of the water side of the plate heat exchanger is controlled to affect the inner water side pipeline of the plate heat exchanger. P...

Embodiment 2

[0051] An air conditioner is provided in this embodiment, and the air conditioner includes a controller. The controller is configured to implement any one of the control methods in Embodiment 1. In addition, the air conditioner also includes: a pressure detection device for detecting the inlet water pressure of the plate heat exchanger and a flow monitoring device for detecting the outlet water flow of the plate heat exchanger.

[0052] The working process of an anti-blocking operation control of the air conditioner will be described below.

[0053] First of all, the system starts to run, and the water side pump of the plate heat exchanger runs.

[0054] Further, the flow monitoring device monitors the plate heat exchanger outlet water flow q in real time, and records the flow value q1 after K minutes. Preferably: the range of K is 0.2-1.

[0055] Specifically, when q-q1>5%Q (Q indicates the maximum flow rate of the water side system of the plate heat exchanger), the water ...

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Abstract

The invention discloses a control method for preventing a blockage on the water side of a plate heat exchanger of an air conditioner and the air conditioner. The control method comprises the following steps: S1, detecting the water outlet flow of the outlet of the water side of the plate heat exchanger; S2, preliminarily judging the blockage of the plate heat exchanger according to the water outlet flow, executing step S3 if the preliminary blockage judgment result shows that the blockage risk exists, and executing step S1 again if the preliminary blockage judgment result shows that no blockage risk exists; and S3, qualitatively judging the blockage according to the water inlet pressure of the inlet of the water side of the plate heat exchanger, controlling the water conveying flow on the water side of the plate heat exchanger to flush a water side pipeline in the plate heat exchanger if the qualitative blockage judgment result shows that the blockage exists, and detecting the water inlet pressure again and qualitatively judging the blockage again if the qualitative blockage judgment result shows that no blockage exists.

Description

technical field [0001] The invention relates to the related technical field of plate heat exchangers, in particular to a control method for preventing water side blockage of an air-conditioning plate heat exchanger and an air conditioner. Background technique [0002] At present, the plate heat exchanger is a high-efficiency heat exchanger composed of a series of metal sheets with a certain corrugated shape. Many flow channels with small flow sections are formed between the plates of the heat exchanger. heat exchange. In recent years, the plate heat exchanger technology has become more and more mature. Compared with other shell and tube heat exchangers, the plate heat exchanger has shown distinctive advantages as soon as it is put into use. It not only has high heat transfer efficiency, but also has a large logarithmic average temperature difference. , Small temperature difference at the end, small heat loss, compact and light structure, easy to change the heat exchange are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/38F24F11/64
CPCF24F11/38F24F11/64
Inventor 罗建飞李华松赵树男郭庆李斌
Owner GREE ELECTRIC APPLIANCES INC
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