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An impeller detection system and method for a range hood

A detection system and range hood technology, which is applied in measuring devices, measuring fluid pressure, and measuring fluid pressure through electromagnetic components, can solve problems such as inaccuracy, detection failure, and cumbersome adjustment of sampling current thresholds, and achieve real-time monitoring. Implementation, simple effect

Active Publication Date: 2020-10-27
杭州九创家电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sampling method is easily affected by the difference in the structure of the motor and the volute, and the adjustment of the sampling current threshold during the production process is cumbersome and inaccurate, and it is easy to cause detection failure due to the above reasons

Method used

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  • An impeller detection system and method for a range hood
  • An impeller detection system and method for a range hood
  • An impeller detection system and method for a range hood

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0059] A kind of impeller detection system 1 of range hood, such as figure 1 , figure 2 As shown, the range hood may include: a motor (not shown), a volute 3 and an air duct 4, the volute 3 communicates with the air duct 4; the volute 3 is provided with an impeller 5, and the motor is used to drive the impeller 5 to rotate; the impeller The detection system 1 may include: a magnetic element 11 disposed on the impeller 5, a magnetic field detection module 12 disposed on the volute 3, and a smoke machine main control unit 13;

[0060] The magnetic field detection module 12 can be used to detect the magnetic field generated by the magnetic element 11 during the rotation of the impeller 5, and form a corresponding pulse signal according to the detected magnetic field signal;

[0061] The main control unit 13 of the hood is used to detect whether the impeller 5 has an abnormal eccentricity according to the amplitude change of the pulse signal, and detect whether there is an abnor...

Embodiment 2

[0069] like image 3 As shown, this embodiment provides a specific judgment scheme for abnormal impeller eccentricity on the basis of the first embodiment.

[0070] Optionally, the main control unit 13 of the range hood detects whether the impeller 5 has an abnormal eccentricity according to the amplitude change of the pulse signal may include:

[0071] Comparing the amplitude variation of the pulse signal with a preset amplitude variation threshold;

[0072] When the amplitude variation of the pulse signal is greater than or equal to the amplitude variation threshold, it is determined that the impeller is eccentrically abnormal; when the amplitude variation of the pulse signal is smaller than the amplitude variation threshold, it is determined that the impeller is normal.

[0073] In the embodiment of the present invention, under normal circumstances, there may be a small amount of eccentricity during the operation of the impeller 5, but generally it will be kept within the ...

Embodiment 3

[0084] like image 3 As shown, on the basis of the second embodiment, this embodiment further defines the method for obtaining the amplitude variation of the magnetic element 11 including a plurality of time pulse signals.

[0085] Optionally, the magnetic element 11 may include one or more;

[0086] When there are multiple magnetic elements 11, the main control unit 13 of the range hood can also be used to obtain the amplitude variation of the pulse signal through the following scheme:

[0087] calculating the average value of the amplitudes of pulse signals corresponding to multiple magnetic elements detected within a preset detection period;

[0088] calculating respectively the absolute value of the maximum value and the difference between the minimum value and the average value among the amplitudes of the pulse signals corresponding to the plurality of magnetic elements;

[0089] The greater value of the two calculated absolute values ​​is taken as the amplitude variation...

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Abstract

The invention discloses an impeller detecting system and method for a range hood. The range hood comprises a motor, a volute and an air flue, wherein the volute is communicated with the air flue; an impeller is arranged inside the volute; and the motor is used for driving the impeller to rotate. The impeller detection system comprises a magnetic element, a magnetic field detection module and a range hood main control unit, wherein the magnetic element is arranged on the impeller; the magnetic field detection module and the range hood main control unit are arranged on the volute; the magnetic field detection module is used for detecting the magnetic field of the magnetic element in the rotation process of the impeller and used for forming corresponding pulse signals according to the detected magnetic field signals; and the range hood main control unit is used for detecting whether the impeller has eccentric abnormity or not according to amplitude change of the pulse signals, and used for detecting whether the air flue has load abnormity or not according to frequency change of the pulse signals. By adopting the scheme of the embodiment, the magnetic element is mounted on the impeller, the magnetic field detection module is arranged on the volute, impeller eccentric abnormity and air flue load abnormity can be rapidly and effectively detected, and real-time monitoring on impelleroperation properties and air flow properties can be achieved.

Description

technical field [0001] Embodiments of the present invention relate to kitchen equipment control technology, especially to a detection system and method for an impeller of a range hood. Background technique [0002] The core components of the range hood include the motor, volute and impeller. The impeller of the range hood may be eccentric due to the oil on the impeller not being cleaned in time or deformed. Larger motors are prone to aging and damage; and when the impeller is running fast, the poor dynamic balance of the impeller will also increase the noise, and the turbulence inside the volute will affect the air volume and air pressure performance. [0003] In addition, the current detection of air duct pressure in the industry is mainly through sampling the motor current value, and a model relationship is formed between the change of motor load and the change of air duct pressure, which is used to judge the change of the working state of the hood. However, this sampling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/312G01L9/16
CPCG01B7/312G01L9/16
Inventor 朱泽春陈震
Owner 杭州九创家电有限公司
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