Search

CN-122004696-A - Sewage water level detection structure and cloth cleaning machine

CN122004696ACN 122004696 ACN122004696 ACN 122004696ACN-122004696-A

Abstract

The application discloses a sewage water level detection structure and a cloth cleaning machine, which comprises a metal probe detection unit, a capacitive sensor detection unit, a signal processing module and a control output module, wherein the signal processing module is respectively and electrically connected with the metal probe detection unit and the capacitive sensor detection unit and is used for processing and comparing a first water level detection signal detected by the metal probe detection unit and a second water level detection signal detected by the capacitive sensor detection unit, judging that the water level detection result is a high water level only when the first water level detection signal and the second water level detection signal are both greater than or equal to a preset high water level threshold value, and the control output module is electrically connected with the signal processing module and is used for outputting a shutdown control instruction when the water level detection result is the high water level. The application provides a sewage water level detection structure and a cloth cleaning machine, which can improve the accuracy and reliability of water level detection and reduce the false judgment rate.

Inventors

  • GUO JIANGANG
  • FENG YI
  • WANG QINRONG

Assignees

  • 广东新宝电器股份有限公司

Dates

Publication Date
20260512
Application Date
20251217

Claims (10)

  1. 1. The sewage level detection structure is characterized by comprising a metal probe detection unit (1), a capacitive sensor detection unit (2), a signal processing module (3) and a control output module (4); The signal processing module (3) is respectively and electrically connected with the metal probe detection unit (1) and the capacitive sensor detection unit (2) and is used for processing and comparing a first water level detection signal detected by the metal probe detection unit (1) and a second water level detection signal detected by the capacitive sensor detection unit (2), and judging that the water level detection result is a high water level only when the first water level detection signal and the second water level detection signal are both greater than or equal to a preset high water level threshold value; The control output module (4) is electrically connected with the signal processing module (3) and is used for outputting a shutdown control instruction when the water level detection result is a high water level, and the shutdown control instruction is used for controlling the cloth cleaning machine to stop running.
  2. 2. The sewage level detection structure according to claim 1, wherein the signal processing module (3) comprises a signal amplifying circuit (31), a filter circuit (32), a comparator (33) and a logic judging unit (34) which are connected in sequence; The signal amplifying circuit (31) is used for amplifying the first water level detection signal and the second water level detection signal; the filter circuit (32) is used for performing filter processing on the amplified first water level detection signal and the amplified second water level detection signal; the comparator (33) is used for comparing the filtered first water level detection signal and the filtered second water level detection signal with the high water level threshold value respectively to obtain a first comparison result and a second comparison result; The logic judgment unit (34) is configured to perform logic operation on the first comparison result and the second comparison result, and judge that the water level detection result is a high water level only when the first comparison result and the second comparison result are both detection signals greater than the high water level threshold.
  3. 3. The wastewater level detection structure according to claim 2, characterized in that the wastewater level detection structure further comprises a calibration module (5); the calibration module (5) is used for calibrating the metal probe detection unit (1) and the capacitive sensor detection unit (2) regularly.
  4. 4. The sewage level detection structure according to claim 2, further comprising a fault diagnosis module (6); the fault diagnosis module (6) is used for outputting a fault alarm signal when the duration of the continuous inconsistency of the first water level detection signal and the second water level detection signal exceeds a preset time.
  5. 5. The structure for detecting a wastewater level according to any one of claims 1 to 4, wherein the metal probe detection unit (1) comprises at least two metal probes insulated from each other, and the metal probes are made of a corrosion-resistant material.
  6. 6. The wastewater level detecting structure of claim 5, wherein the corrosion-resistant material is 316L stainless steel or titanium alloy.
  7. 7. The wastewater level detection structure according to any one of claims 1 to 4, wherein the capacitive sensor detection unit (2) is a parallel plate capacitor or a coaxial cylinder capacitor, and the detection end of the capacitive sensor detection unit (2) and the high water level detection point of the metal probe detection unit (1) are located at the same level.
  8. 8. The sewage level detection structure according to claim 7, wherein the detection end of the capacitive sensor detection unit (2) is provided with an insulating layer, and the insulating layer is an anti-corrosion material layer.
  9. 9. The wastewater level detecting structure of claim 8, wherein the insulating layer is a tetrafluoroethylene insulating layer.
  10. 10. A cloth cleaning machine, characterized by comprising the sewage water level detection structure according to any one of claims 1 to 9.

Description

Sewage water level detection structure and cloth cleaning machine Technical Field The invention relates to the technical field of electric appliances, in particular to a sewage level detection structure and a cloth cleaning machine. Background The cloth cleaner is one special equipment for cleaning cloth furniture, carpet, curtain, etc. The high-pressure water jet and suction combined mode can penetrate into the fabric, so that stains, dust and peculiar smell can be effectively removed, sewage generated in the cleaning process is recycled to the sewage tank in real time, secondary pollution is avoided, and the cleaning of users is facilitated. At present, most cloth cleaning machine equipment on the market adopts single metal probe to detect sewage water level, and as disclosed in Chinese patent No. CN202110519242.1, a water-absorbing type cleaning appliance with a water level detection function is disclosed, and the metal probe is directly contacted with sewage water, so that after long-term use, the metal probe is easy to corrode or scale due to the adhesion of impurities, misjudgment of overflow or shutdown delay occurs, and the water level detection reliability is low. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a sewage water level detection structure and a cloth cleaning machine, which can improve the accuracy and reliability of water level detection and reduce the false judgment rate. The technical scheme adopted for solving the technical problems is that the sewage level detection structure comprises a metal probe detection unit, a capacitive sensor detection unit, a signal processing module and a control output module; the signal processing module is respectively and electrically connected with the metal probe detection unit and the capacitive sensor detection unit and is used for processing and comparing the first water level detection signal detected by the metal probe detection unit and the second water level detection signal detected by the capacitive sensor detection unit, and judging that the water level detection result is a high water level only when the first water level detection signal and the second water level detection signal are both greater than or equal to a preset high water level threshold value; The control output module is electrically connected with the signal processing module and is used for outputting a stop control instruction when the water level detection result is high water level, and the stop control instruction is used for controlling the cloth cleaner to stop running. According to the sewage water level detection structure, the metal probe detection unit and the capacitive sensor detection unit are adopted in the double detection mode, two paths of detection signals are processed and compared through the signal processing module, the advantages of direct detection of the metal probe and non-contact detection of the capacitive sensor are combined, equipment is controlled to stop only when high water levels are detected by the metal probe detection unit and the capacitive sensor detection unit, the accuracy and the reliability of water level detection can be improved, and the misjudgment rate is reduced. In a preferred technical scheme, the signal processing module comprises a signal amplifying circuit, a filter circuit, a comparator and a logic judging unit which are connected in sequence; The signal amplifying circuit is used for amplifying the first water level detection signal and the second water level detection signal, the filtering circuit is used for carrying out filtering processing on the amplified first water level detection signal and the amplified second water level detection signal, the comparator is used for comparing the filtered first water level detection signal and the filtered second water level detection signal with a high water level threshold value respectively to obtain a first comparison result and a second comparison result, the logic judging unit is used for carrying out logic operation on the first comparison result and the second comparison result, and the water level detection result is judged to be the high water level only when the first comparison result and the second comparison result are both detection signals which are larger than the high water level threshold value. The signal processing module in the technology realizes amplification, filtering and comparison of two paths of water level detection signals through the signal amplifying circuit, the filter circuit, the comparator and the logic judging unit which are sequentially connected, and carries out logic judgment on two comparison results, so that whether sewage reaches a high water level can be judged more accurately, and the structure is simple and practical. In a preferred technical scheme, the sewage level detection structure further comprises a calibration module, wherein the calibration module is used for calibratin