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A liquid level detection method and device

A technology for liquid level detection and liquid container, which is applied in the field of liquid level sensing and can solve the problems of inability to correctly judge the liquid level of detergents and failure of the detection circuit to work normally.

Active Publication Date: 2021-05-25
深圳和而泰小家电智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the electrode of the probe is applied with a DC voltage in the detergent, the electrode is actually in the state of electroplating, and a protective film will be formed on the surface of the electrode. Due to the non-conductivity of the oxide film, the entire detection circuit cannot work normally. Unable to judge the detergent level correctly

Method used

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  • A liquid level detection method and device
  • A liquid level detection method and device
  • A liquid level detection method and device

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0052] See figure 1 , is a schematic scene diagram of a liquid level detection method provided by an embodiment of the present invention. Such as figure 1 As shown, the infrared photoelectric sensor includes an infrared emitting tube 101 and an infrared receiving head 102. The infrared emitting tube 101 is used to send infrared light to the infrared receiving head 102. The infrared emitting tube 101 and the infrared receiving head 102 are respectively located at t...

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Abstract

The embodiment of the present invention provides a liquid level detection method and device, the method comprising: turning on the infrared photoelectric sensor; adjusting the working state value of the infrared emitting tube to adjust the infrared light intensity emitted by the infrared emitting tube; changing the infrared light intensity to When within the preset luminous intensity range, the working state value of the infrared emitting tube is recorded as the conduction value of the infrared photoelectric sensor; the liquid level detection result at the first height of the liquid container wall is judged according to the conduction value. By adopting the application, the interference existing in the conventional level detection mode can be effectively avoided, and the reliability of the liquid level detection result can be improved.

Description

technical field [0001] The invention relates to the technical field of liquid level sensing, in particular to a liquid level detection method and device. Background technique [0002] For washing machines with detergent automatic feeding function on the market, since the detergent storage box is built into the washing machine, the user cannot directly see the consumption of detergent. When the amount of detergent is insufficient, the user needs to be reminded to add it in time, so it is necessary to detect the liquid level of detergent. [0003] At present, the most commonly used detergent liquid level detection method is to set a probe, specifically, to set a metal electrode at a certain position of the detergent storage box, and judge the liquid level of the detergent through the conductive characteristics of the detergent. However, when the electrode of the probe is applied with a DC voltage in the detergent, the electrode is actually in the state of electroplating, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/22G01N21/17
CPCG01F23/22G01N21/17
Inventor 赵东赵自荐刁大志
Owner 深圳和而泰小家电智能科技有限公司