Water-level control apparatus of the fruit and vegetable cleaning machine

• Main Authors: CAI WEIMING, QU YICHENG
• Format: Patent
• Language: Chinese; English
• Published: 06.02.2008
• Subjects: APPARATUS FOR MAKING BEVERAGES; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS; COFFEE MILLS; DOMESTIC ARTICLES OR APPLIANCES; FOODS OR FOODSTUFFS; FURNITURE; HUMAN NECESSITIES; KITCHEN EQUIPMENT; MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLESOR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; SPICE MILLS; SUCTION CLEANERS IN GENERAL; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES

The utility model relates to a water level control device for cleaning machine for fruits and vegetable cleaning machine comprising a transparent aqueduct communicated with a cleaning barrel. An opaque float is arranged in the aqueduct. Photoelectric sensors are arranged on the aqueduct and connected with a control circuit. The photoelectric sensor comprises photodiodes and NPN-photos. The photodiodes and the NPN-photos are oppositely arranged on both sides of the aqueduct. Two and more photoelectric sensors are arranged at different heights of the aqueduct aiming to accurately monitor water level at different heights. The utility model replaces prior floating ball switch by directly positioning the photoelectric sensors in the transparent aqueduct containing the opaque float, so as to accurately monitor water level of the cleaning barrel. As light emitted by the photodiodes of the photoelectric sensors has strong unidirection, application of photoelectric sensors can greatly improve sensitivity of water leve