Air performance testing device and positioning method of circular hole plate
A test device, technology of round orifice plate, applied in the direction of measuring device, using optical device, detecting fluid flow by measuring pressure difference, etc., can solve the problems of large positioning error, affecting the accuracy of air volume test, measurement error, etc., and achieve air performance The effect of accurate testing, small amount of calculation, and high positioning accuracy
Active Publication Date: 2020-03-03
NINGBO FOTILE KITCHEN WARE CO LTD
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Problems solved by technology
However, manual replacement of the orifice will inevitably lead to large positioning errors, which in turn will affect the accuracy of the air volume test
At the same time, the diameter of the round hole in the replaced orifice plate is often entered into the computer according to the label, and if there is a wrong label, it will also cause measurement errors
Method used
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] Such as figure 1 As shown, the air performance testing device in this embodiment can be applied to various product tests that require air performance testing. For example, the air performance testing device can be connected to a range hood for air volume testing of the range hood.
[0022] The air performance testing device includes a hollow air volume testing cylinder 1, a round hole plate 2 with a round hole in the center, a light source 3, a driving mechanism 4, and an illumination sensor 5. When testing, it is necessary to replace the round hole plate 2 with a different aperture. The orifice plate 2 is installed on the port at the end of the air volume test cylinder 1 for air volume testing, and then the air volume data of the test product is calculated and obtained according to the test structure of the hole plate 2 with different ...
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The invention relates to an air performance testing device. The device comprises an air volume testing cylinder, a circular hole plate, a light source and a driving mechanism; the first end of the airvolume test cylinder is connected to a to-be-tested air outlet; the light source and the center of the air volume testing cylinder are coaxially arranged or the light source and the center of the circular hole of the circular hole plate are coaxially arranged; the driving mechanism can grab the circular hole plate and drive the circular hole plate to be installed in the orifice of the second endof the air volume testing cylinder; and the end surface of the second end of the air volume testing cylinder is provided with at least two sets of illuminance sensors which are symmetrical relative tothe center of the air volume test cylinder. According to the air performance testing device, the automatic replacement of the circular hole plate can be realized. The invention further relates to a positioning method of the circular hole plate. The positioning method comprises the following steps that: illuminance intensity values under the shielding state of the circular hole plate are obtained;the illuminance intensity values of each group of symmetrical illuminance sampling points are subjected to comparative calculation; the circular hole plate moves to an illuminance sampling point witha large illumination intensity value, and if the illuminance intensity difference value of each group of symmetrical illuminance sampling points is smaller than a preset value, the accurate positioning of the circular hole plate is realized.
Description
technical field [0001] The invention relates to a positioning method of a circular hole plate, and also relates to a range hood air volume testing device. Background technique [0002] At present, range hoods are widely used in kitchens, and the quality of the range hood is directly related to the performance of the motor installed inside. The most direct performance of the motor is the air volume of the range hood. It is an important basis for judging the quality of the range hood during the air volume test of the range hood. [0003] Authorized announcement number is CN20202479U (application number is 201020691808.6) Chinese utility model patent "A Range Hood Air Volume Test Device", in which the range hood test device disclosed is connected to the range hood for use, including a fairing and a pressure reducing cylinder , a control cabinet and a computer, the fairing is connected to the range hood through an air duct, one end of the fairing and the decompression cylinder ...
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IPC IPC(8): G01F1/42G01B11/27
CPCG01B11/27G01F1/42
Inventor 陆枫
Owner NINGBO FOTILE KITCHEN WARE CO LTD