Wind pressure switch testing instrument and control method thereof
An air pressure switch and tester technology, applied in the field of testers, can solve the problems of low precision and less air pressure switch performance detection, etc.
Active Publication Date: 2015-06-10
ZHONGSHAN HUAXI ELECTRONICS TECH
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Problems solved by technology
[0002] At present, in the domestic gas water heater industry, air pressure switches are often required, but because air pressure switches are generally purchased from manufacturers specializing in the manufacture of air pressure switches, and the parameters of the air pressure switch are also provided by the manufacturers, the domestic gas water heater industry generally has little need for air pressure switches. The performance of the switch is further tested, even if it is tested, it is tested through complex equipment in the laboratory, and the accuracy is low
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Embodiment Construction
[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] see figure 1 and figure 2 , the wind pressure switch tester, including the wind pressure output port 3 and the detection wiring port 4, the wind pressure switch is electrically connected to the detection wiring port, the wind pressure output port is connected to the suction port 6.2 and the air outlet 6.1 of the fan through a positive and negative pressure conversion mechanism The fan, the positive and negative pressure conversion mechanism and the detection wiring port are respectively electrically connected to the control circuit.
[0029] The control circuit is also electrically connected with the man-machine interface. The man-machine interface includes a display screen 2 and a control panel 5; the display screen, control panel, wind pressure output port 3 and detection wiring port 4 are arranged on the surface of the chassis 1 of the wind...
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The invention discloses a wind pressure switch testing instrument and a control method thereof. The testing instrument includes a wind pressure output port and a detection connecting wire port, wherein a wind pressure switch is electrically connected with the detection connecting wire port; the wind pressure output port of the testing instrument is connected with an exhaust inlet and an air outlet of a blower through a positive / negative switching mechanism; and the positive / negative switching mechanism and the detection connecting wire port are electrically connected with a control circuit respectively. The control method is that the wind pressure switch is connected between the wind pressure output port and the detection connecting wire port; the centrifugal fan is combined with the positive / negative switching mechanism to generate wind pressure to the wind pressure switch; an elementary error pressure sensor detects the wind pressure exerted on the wind pressure switch, and sends a detection signal passing by an analog-to-digital converter to a singlechip; the singlechip collects the wind pressure signal, and controls a constant-voltage source to supply power for the centrifugal fan through the digital to analog converter, thereby forming a close-loop control system. The resistance when the microswitch is closed can be calculated through testing the voltage at the two ends of a switch contact point when the microswitch of the wind pressure switch is closed.
Description
technical field [0001] The invention relates to a tester, in particular to a tester for a wind pressure switch and a control method thereof. The wind pressure switch is mainly used for a wind pressure switch in household gas instant water heaters. Background technique [0002] At present, in the domestic gas water heater industry, air pressure switches are often required, but because air pressure switches are generally purchased from manufacturers specializing in the manufacture of air pressure switches, and the parameters of the air pressure switch are also provided by the manufacturers, the domestic gas water heater industry generally has little need for air pressure switches. The performance of the switch is further tested, even if it is tested, it is tested through complex equipment in the laboratory, and the precision is low. Contents of the invention [0003] The object of the present invention is to provide a wind pressure switch tester with simple and reasonable st...
Claims
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IPC IPC(8): G01R31/327G05B19/042
Inventor 杨超胡辉华裴俊
Owner ZHONGSHAN HUAXI ELECTRONICS TECH