A fan frequency control method, device, air curtain machine and display cabinet

A technology of fan frequency and control method, which is applied in the field of air curtain machine and display cabinet, fan frequency control, can solve the problems of fan static pressure increase and wind speed decrease, and achieve the effect of constant ambient temperature and quality assurance

Active Publication Date: 2022-02-01
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a fan frequency control method, device, air curtain machine and display cabinet to solve the problem in the prior art that the evaporator is gradually frosted, resulting in an increase in the static pressure of the fan, which in turn leads to a decrease in the wind speed

Method used

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  • A fan frequency control method, device, air curtain machine and display cabinet
  • A fan frequency control method, device, air curtain machine and display cabinet
  • A fan frequency control method, device, air curtain machine and display cabinet

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Embodiment 1

[0062] This embodiment provides a fan frequency control method, which is applied to an air curtain machine, figure 1 It is a structural diagram of an air curtain machine according to an embodiment of the present invention, such as figure 1 As shown, the air curtain machine includes: an evaporator 1, a fan 2, a throttling device 3, and a liquid supply solenoid valve 4. The liquid heat exchange medium flows from the liquid supply solenoid valve 4 through the throttling device 3 to the evaporator 1. Evaporating and absorbing heat in the evaporator 1 reduces the temperature of the air around the evaporator 1, and the fan 2 blows out the cold air generated around the evaporator 1 to form an air curtain.

[0063] figure 2 It is a flowchart of a fan frequency control method according to an embodiment of the present invention, such as figure 2 As shown, the method includes:

[0064] S201. Determine the operation mode of the air curtain machine; wherein, the operation mode include...

Embodiment 2

[0072] This embodiment provides another fan frequency control method. In order to accurately obtain the current wind speed, the above step S202 specifically includes:

[0073] Every preset time interval, get the wind speed of multiple detection points; Wherein, the multiple detection points are all located on the wind outlet side of the evaporator of the air curtain machine; The wind speed of multiple detection points can be obtained by The air outlet side of the evaporator of the curtain machine is provided with multiple wind speed sensors, for example, through multiple wind speed sensors, the wind speed of the wind is obtained in real time, and all the wind speed data obtained by multiple wind speed sensors in the previous 1 second are obtained every 1 second; according to The average outlet wind speed is calculated from the outlet wind speeds of multiple detection points as the current outlet wind speed.

[0074] Specifically, when calculating the average outlet wind speed ...

Embodiment 3

[0087] This embodiment provides another fan frequency control method, which is applied to the air curtain machine, as mentioned above figure 1 As shown in , the air curtain machine includes: liquid supply solenoid valve 4, throttling device 3, evaporator 1 and fan 2. The fan used in the present invention is a variable frequency fan. On the air outlet side of the evaporator of the conventional refrigeration system of the air curtain machine, n wind speed sensors are set according to the actual design length of the evaporator 1 and connected to the main board using signal lines to transmit the wind speed detection value in real time. . image 3 It is a flowchart of a fan frequency control method according to another embodiment of the present invention, such as image 3 As shown, the method includes.

[0088] S1, according to the different designed evaporators, confirm the parameters of the actual evaporator by matching, and determine the frequency lower limit value f(1) and fr...

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PUM

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Abstract

The invention discloses a fan frequency control method, device, air curtain machine and display cabinet. Wherein, the method includes: determining the operation mode of the air curtain machine; wherein, the operation mode includes at least one of the following: cooling mode, defrosting mode; obtaining the current wind speed of the air curtain machine; according to the The operating mode and the current outlet air speed adjust the fan frequency. The present invention can ensure that the wind speed of the air curtain machine is constant and will not be affected by frosting or defrosting, thereby ensuring that the ambient temperature of the articles in the air curtain is constant, and the quality of the articles is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of temperature control equipment, in particular to a fan frequency control method and device, an air curtain machine and a display cabinet. Background technique [0002] The open display cabinet mainly uses the air outlet of the air curtain machine to jet out an air curtain to separate the low temperature environment inside the display cabinet from the high temperature environment outside the display cabinet, so as to reduce the intrusion of heat. The performance of the air curtain directly affects the temperature balance in the cabinet and the quality of the stored goods. [0003] At present, most of the existing display cabinets use fixed-frequency fans to maintain the air curtain. Due to the gradual frosting of the evaporator, the static pressure of the fan increases. As the frequency of the fan is constant, the static pressure of the fan increases. Therefore, even if the air curtain is formed wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00A47F3/04
CPCF04D27/004A47F3/0447A47F3/0478
Inventor 关焕豪李福良孙庆一鸣苗志强
Owner GREE ELECTRIC APPLIANCES INC
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