Liquid storage tank with swing arm liquid level detection mechanism

Abstract

A liquid storage tank with a swing-arm liquid level detection mechanism includes a storage tank for storing cleaning fluid. A rotating shaft is installed inside the storage tank, and a swing arm is mounted on the shaft. A float is mounted on the movable end of the swing arm, and the float can rise and fall along an arc-shaped trajectory according to the liquid level. A liquid level magnet is disposed on the front side of the float, and the liquid level magnet moves synchronously with the float along the arc-shaped trajectory. An arc-shaped circuit board covering the movable trajectory of the liquid level magnet is disposed on the front wall of the storage tank. Multiple magnetic sensors are disposed on the circuit board at different heights. When the float rises and falls, the liquid level magnet approaches the corresponding magnetic sensor, and the magnetic sensor sends a corresponding position signal. This invention can detect the liquid level of the cleaning fluid in the storage tank, sending corresponding position signals based on different liquid levels, thus allowing the electrical system to determine the remaining amount of cleaning fluid. It has the advantages of simple structure and accurate liquid level sensing, and has good market prospects.

Description

Technical Field

[0001] This utility model relates to a dishwasher accessory, specifically a liquid storage tank with a swing-arm type liquid level detection mechanism that can accurately transmit the liquid level signal corresponding to the liquid storage tank. Background Technology

[0002] Dishwashers are very practical cleaning tools that effectively remove dirt and bacteria from their interiors, ensuring the hygiene and cleanliness of tableware. However, most dishwashers on the market lack automatic liquid dispensing mechanisms with level detection functions. They don't alert you when the cleaning fluid is low, often resulting in dishes not being properly cleaned due to insufficient fluid.

[0003] The Patent Office published a functional combination device for a sink dishwasher on May 31, 2019, with patent number 201820934182.3. The device includes a reed switch with a float integrated into the detergent dispenser for detecting the detergent level; a filling box located above the detergent dispenser for injecting detergent into the dispenser; a water inlet flow control component including an inlet pipe, a flow meter, and an inlet valve, with the first end of the inlet pipe connected to the inlet valve and the second end connected to the filling box, and a flow meter installed at the connection between the filling box and the inlet pipe; and an overflow protection box located above the detergent dispenser. This device only automatically closes the reed switch when detergent is insufficient and automatically opens it when detergent is present, failing to accurately transmit the corresponding liquid level signal of the storage tank. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies and shortcomings of the prior art by providing a liquid storage tank with a swing-arm type liquid level detection mechanism that can accurately transmit the liquid level signal corresponding to the storage tank.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The storage tank with a swing arm-type liquid level detection mechanism includes a storage tank for storing cleaning fluid. A rotating shaft is installed inside the storage tank, and a swing arm is mounted on the rotating shaft. A float is mounted on the movable end of the swing arm, and the float can rise and fall along an arc-shaped trajectory with the height of the liquid level. A liquid level magnet is provided on the front side of the float, and the liquid level magnet moves synchronously along the arc-shaped trajectory with the float. An arc-shaped circuit board covering the movable trajectory of the liquid level magnet is provided on the front wall of the storage tank. Multiple magnetic sensors are provided on the circuit board, and the multiple magnetic sensors are distributed at different heights. When the float rises and falls, the liquid level magnet approaches the corresponding magnetic sensor, and the magnetic sensor can send the corresponding position signal.

[0006] The magnetic sensor is a reed switch or a Hall sensor.

[0007] The liquid storage tank is equipped with an upper limit rod and a lower limit rod, which limit the upward and downward rotation of the swing arm, respectively.

[0008] The front wall of the liquid storage tank is provided with an inward arc-shaped groove, and the arc-shaped circuit board is embedded in the arc-shaped groove, so that the arc-shaped circuit board is closer to the liquid level magnet.

[0009] The liquid storage tank is equipped with an arc-shaped support plate, which is located on the back of the swing arm and supports the back of the movable end of the swing arm.

[0010] An angle magnet is provided at the front end of the rotating shaft, and a magnetic encoder is installed on the front wall of the liquid storage tank, which is close to the angle magnet.

[0011] This invention relates to a liquid storage tank for appliances such as dishwashers, used to store cleaning fluid. The swing-arm type liquid level detection mechanism can detect the liquid level in the tank, sending signals to indicate the corresponding position based on different liquid levels. This allows the appliance to determine the remaining liquid level. It has the advantages of simple structure and accurate liquid level sensing, and has good market prospects. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 for Figure 1 A structural sectional view.

[0014] Figure 3 This is a planar sectional view of the internal structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the swing arm structure of this utility model.

[0016] Figure 5 This is a schematic diagram of the arc-shaped circuit board structure of this utility model.

[0017] Figure 6 This is a schematic diagram of the magnetic encoder structure of this utility model. Detailed Implementation

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model relates to a liquid storage tank with a swing arm-type liquid level detection mechanism, which is an accessory for appliances such as dishwashers and is used to store cleaning fluid. A rotating shaft 41 is installed inside the liquid storage tank 10. Both ends of the rotating shaft 41 are inserted into the mounting holes of the liquid storage tank 10, allowing the rotating shaft 41 to rotate on its own. A swing arm 40 is mounted on the rotating shaft 41, and a float 42 is mounted on the movable end of the swing arm 40. The float 42 can rise and fall along an arc-shaped trajectory according to the liquid level. An upper limit rod 13 and a lower limit rod 14 are provided inside the liquid storage tank 10 to limit the upward and downward rotation of the swing arm 40, respectively.

[0019] Combination Figure 4 , Figure 5 As shown, a liquid level magnet 44 is provided on the front side of the float 42, and the liquid level magnet 44 moves synchronously with the float 42 along an arc-shaped trajectory. An arc-shaped circuit board 20 covering the movable trajectory of the liquid level magnet 44 is provided on the front wall of the storage tank 10. Multiple magnetic sensors 21, which are reed switches or Hall sensors, are provided on the circuit board and are distributed at different heights. When the float 42 rises and falls, the liquid level magnet 44 approaches the corresponding magnetic sensor 21, and the magnetic sensor 21 can send the corresponding position signal. An inward arc-shaped groove 11 is provided on the front wall of the storage tank 10, and the arc-shaped circuit board 20 is embedded in the arc-shaped groove 11, so that the arc-shaped circuit board 20 is closer to the liquid level magnet 44. An arc-shaped support plate 12 is provided inside the storage tank 10. The arc-shaped support plate 12 is located on the back of the swing arm 40 and supports the back of the movable end of the swing arm 40, ensuring that the liquid level magnet 44 is in close contact with the front inner wall of the storage tank 10.

[0020] Combination Figure 6 As shown, an angle magnet 43 is provided at the front end of the rotating shaft 41, and a magnetic encoder 30 is installed on the front wall of the liquid storage tank 10. The magnetic encoder 30 is close to the angle magnet 43. When the swing arm 40 drives the rotating shaft 41 to rotate, the magnetic field lines of the angle magnet 43 will change. The magnetic encoder 30 sends an angle change signal according to the change of the magnetic field lines, thereby calculating the height of the liquid level. This signal is then verified with the signal from the magnetic sensor 21 to make the liquid level sensing more accurate.

[0021] This utility model relates to a liquid storage tank 10 for appliances such as dishwashers, used to store cleaning fluid. The swing-arm type liquid level detection mechanism can detect the liquid level in the storage tank 10, sending signals to corresponding positions based on different liquid levels. This allows the appliance to determine the remaining amount of cleaning fluid. It has the advantages of simple structure and accurate liquid level sensing, and has good market prospects.

Claims

1. A liquid storage tank with a swing-arm type liquid level detection mechanism, comprising a liquid storage tank for storing cleaning fluid, characterized in that... The liquid storage tank contains a rotating shaft with a swing arm mounted on it. A float is mounted on the movable end of the swing arm, and the float can rise and fall along an arc-shaped trajectory with the liquid level. A liquid level magnet is located on the front side of the float, and the liquid level magnet moves synchronously with the float along the arc-shaped trajectory. An arc-shaped circuit board covering the movable trajectory of the liquid level magnet is located on the front wall of the liquid storage tank. Multiple magnetic sensors are mounted on the circuit board, and the multiple magnetic sensors are distributed at different heights. When the float rises and falls, the liquid level magnet approaches the corresponding magnetic sensor, and the magnetic sensor can send the corresponding position signal.

2. The liquid storage tank with a swing arm liquid level detection mechanism according to claim 1, characterized in that... The magnetic sensor is a reed switch or a Hall sensor.

3. The liquid storage tank with a swing arm liquid level detection mechanism according to claim 1, characterized in that... The liquid storage tank is equipped with an upper limit rod and a lower limit rod, which limit the upward and downward rotation of the swing arm, respectively.

4. The liquid storage tank with a swing arm liquid level detection mechanism according to claim 1, characterized in that... The front wall of the liquid storage tank is provided with an inward arc-shaped groove, and the arc-shaped circuit board is embedded in the arc-shaped groove, so that the arc-shaped circuit board is closer to the liquid level magnet.

5. The liquid storage tank with a swing arm liquid level detection mechanism according to claim 1, characterized in that... The liquid storage tank is equipped with an arc-shaped support plate, which is located on the back of the swing arm and supports the back of the movable end of the swing arm.

6. The liquid storage tank with a swing arm liquid level detection mechanism according to any one of claims 1-5, characterized in that... An angle magnet is provided at the front end of the rotating shaft, and a magnetic encoder is installed on the front wall of the liquid storage tank, which is close to the angle magnet.

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