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Sensor circuit for range hood and range hood thereof

A sensor circuit and range hood technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of affecting the detection effect, failing to reach the detection range, reducing the detection range of the oil fume concentration by the infrared receiving tube, etc., and achieving good response detection Concentration, the effect of little deviation of output signal

Pending Publication Date: 2019-09-06
VATTI CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional zeroing circuit is usually fixed zeroing, which is not enough for the infrared receiving tube affected by ambient light and ambient temperature. Different ambient light and ambient temperature will affect the output current of the infrared receiving tube, so that the fixed zeroing The method is meaningless; when the infrared receiving tube is affected by ambient light and ambient temperature, the detection range of the infrared receiving tube for the concentration of oil fume will be reduced, so that it cannot reach the proper detection range, thus affecting the detection effect

Method used

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  • Sensor circuit for range hood and range hood thereof
  • Sensor circuit for range hood and range hood thereof
  • Sensor circuit for range hood and range hood thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 of the present invention provides a sensor circuit for range hoods, such as figure 2 As shown, it includes an infrared receiving module 1, a DA conversion module 2, a differential amplifier module 3, and a processor 4;

[0031] The infrared receiving module 1 includes an infrared receiving tube J1, a first resistor R1, a thermistor RZ, and a tenth resistor R10, one end of the infrared receiving tube J1 is connected to a power supply, and the other end is grounded through the first resistor R1; One end of the thermistor RZ is connected to the power supply, the other end is grounded through the tenth resistor R10 and the first resistor R1 , and the processor 4 is connected between the thermistor RZ and the tenth resistor R10 .

[0032] The DA conversion module includes a DA chip, and the model that the DA can adopt is AD5320.

[0033] Further, a reserved resistor R3 is also included, one end of the reserved resistor R3 is grounded, and the other end is conn...

Embodiment 2

[0043] Embodiment 2 of the present invention provides a sensor circuit for range hoods, such as image 3 As shown, it includes an infrared receiving module 1, a DA conversion module 2, a differential amplifier module 3, and a processor 4;

[0044] The infrared receiving module 1 includes an infrared receiving tube J1, a first resistor R1, a thermistor RZ, and a tenth resistor R10, one end of the infrared receiving tube J1 is connected to a power supply, and the other end is grounded through the first resistor R1; One end of the thermistor RZ is connected to the power supply, the other end is grounded through the tenth resistor R10 and the first resistor R1 , and the processor 4 is connected between the thermistor RZ and the tenth resistor R10 .

[0045] The DA conversion module includes a DA chip, and the model that the DA can adopt is AD5320.

[0046] Further, a reserved resistor R3 is also included, one end of the reserved resistor R3 is grounded, and the other end is conne...

Embodiment 3

[0055] Embodiment 3 of the present invention provides a sensor circuit for range hoods, such as Figure 4 As shown, it includes an infrared receiving module 1, a DA conversion module 2, a differential amplifier module 3, and a processor 4;

[0056] The infrared receiving module 1 includes an infrared receiving tube J1, a first resistor R1, a thermistor RZ, and a tenth resistor R10, one end of the infrared receiving tube J1 is connected to a power supply, and the other end is grounded through the first resistor R1; One end of the thermistor RZ is connected to the power supply, the other end is grounded through the tenth resistor R10 and the first resistor R1 , and the processor 4 is connected between the thermistor RZ and the tenth resistor R10 .

[0057] The DA conversion module includes a DA chip, and the model that the DA can adopt is AD5320.

[0058] Further, a reserved resistor R3 is also included, one end of the reserved resistor R3 is grounded, and the other end is conn...

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PUM

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Abstract

The invention discloses a sensor circuit for a range hood. The sensor circuit comprises: an infrared receiving module, wherein one end of the infrared receiving module is connected with a power supply, and the other end of the infrared receiving module is connected with a differential amplification module; DA conversion module, wherein one end of the DA conversion module is connected with a processor, and the other end of the DA conversion module is connected with the differential amplification module; a differential amplification module, wherein the input ends of the differential amplification module are respectively connected with the infrared receiving module and the DA conversion module to play a role of automatic zero setting; and a processor, wherein the processor is connected with the DA conversion module. The invention also discloses a range hood. The invention adjusts a zero setting circuit in real time by outputting a DA signal of the DA conversion module; and when the infrared receiving module is influenced by ambient light or temperature, a zero point can be adjusted by outputting the DA signal, so that the output signal deviation of the circuit is not large, and the concentration can be better detected in a reaction manner.

Description

technical field [0001] The invention belongs to the technical field of range hood control, and in particular relates to a sensor circuit for a range hood and the range hood. Background technique [0002] The traditional zeroing circuit is usually fixed zeroing, which is not enough for the infrared receiving tube affected by ambient light and ambient temperature. Different ambient light and ambient temperature will affect the output current of the infrared receiving tube, so that the fixed zeroing The method is meaningless; when the infrared receiving tube is affected by ambient light and ambient temperature, the detection range of the infrared receiving tube for the concentration of oil fume will be reduced, so that it cannot reach the proper detection range, thereby affecting the detection effect. Contents of the invention [0003] In view of this, the main purpose of the present invention is to provide a sensor circuit for a range hood and the range hood thereof. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N33/00
CPCG01N15/06G01N33/00
Inventor 郭文光闫旺刘明雄潘叶江
Owner VATTI CORP LTD