Electronic water level device for a dishwasher

Abstract

The utility model provides a kind of electronic water level device of dishwasher, it is related to dishwasher technical field, including water leveler fixed in the water tank outer side wall and electronic liquid level controller fixed on cabinet;Upper and lower through cavity is equipped in the water leveler, the water leveler bottom is sealingly connected with the water tank side wall bottom, and the cavity is communicated with water tank;The water leveler top is sealingly connected with a gas pipe joint, the gas pipe joint lower end is communicated with cavity, and the gas pipe joint upper end is sealingly connected with one end of a gas pipe;Electronic liquid level controller includes controller and air pressure sensor, the other end of the gas pipe is sealingly connected with air pressure sensor, and air pressure sensor is electrically connected with controller, and controller is electrically connected with water pump motor.Detecting the air pressure in the water leveler, to realize detecting actual liquid level height in water tank, controller controls water pump motor work according to the actual liquid level height detected, and water tank liquid level detection is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of commercial dishwasher technology, and more specifically, to an electronic water level device for a dishwasher. Background Technology

[0002] Commercial dishwashers are a new type of kitchen dishwashing equipment, mainly used in kitchens of schools, hotels, businesses, military units, and dishwashing disinfection companies where the volume of dishwashing is high. Compared to manual washing, commercial dishwashers have advantages such as high washing efficiency, reduced labor costs, and solving the problem of insufficient dishwashing supply.

[0003] Traditional dishwashers contain a water tank, a spray cleaning chamber, and a water pump within their cabinet. The water tank supplies water to the spray cleaning chamber via a water supply system. The dishes are washed in the spray cleaning chamber, and the water pump replenishes the water tank. During the washing process, it's crucial to ensure sufficient water in the tank. Existing technologies employ water level detectors at different heights within the tank. Triggering these detectors at varying heights helps determine the approximate water level and subsequently controls the water pump to replenish the tank.

[0004] To reduce the water consumption during dishwasher cleaning, existing technologies incorporate a structure that connects the spray cleaning chamber and the water tank. Water used for cleaning in the spray cleaning chamber also enters the water tank, and a water supply system circulates the water from the tank back to the spray cleaning chamber for further cleaning, thus achieving water reuse. Simultaneously, to ensure the cleanliness of the water in the tank, a drain pipe is installed at the bottom to discharge wastewater, and an overflow pipe is installed at the top of the tank to remove any floating debris generated during cleaning.

[0005] However, in this type of dishwasher, after the spray cleaning chamber and the water tank are connected, the water in the water tank is simultaneously discharged and injected during the cleaning process. Moreover, the water surface will also slosh around during the cleaning. The sloshing water surface and floating or suspended objects after cleaning may accidentally trigger the high-level water level detector, making it impossible to accurately monitor the liquid level in the water tank. The water tank cannot be replenished in time, and the water supply device is at risk of running dry and being damaged. The dishwasher will also not clean properly. Utility Model Content

[0006] The technical problem to be solved by this utility model is that the liquid level detection of the dishwasher water tank is inaccurate in the prior art. In order to overcome the above defects of the prior art, this utility model provides an electronic water level sensor device for a dishwasher.

[0007] This utility model provides an electronic water level device for a dishwasher, including a water level sensor fixed to the outer wall of a water tank and an electronic liquid level controller fixed to a cabinet; the water level sensor has a vertically penetrating cavity, the bottom of the water level sensor is sealed to the bottom of the side wall of the water tank, and the cavity is connected to the water tank; the top of the water level sensor is sealed to an air pipe connector, the lower end of the air pipe connector is connected to the cavity, and the upper end of the air pipe connector is sealed to one end of an air pipe; the electronic liquid level controller includes a controller and a pressure sensor, the other end of the air pipe is sealed to the pressure sensor, the pressure sensor is electrically connected to the controller, and the controller is electrically connected to a water pump motor.

[0008] Compared with the prior art, the electronic water level device for a dishwasher disclosed in this application has the following advantages: the water level device is connected to the bottom of the side wall of the water tank, and then connected to the air pressure sensor through an air pipe. By detecting the air pressure in the water level device, the actual liquid level in the water tank can be detected. The controller controls the water pump motor to work according to the detected actual liquid level. The water tank liquid level detection is more accurate, and the water level device isolates the water tank to prevent suspended matter in the water tank from entering the air pipe and affecting the detection results.

[0009] In one possible implementation, the water level gauge includes a sleeve and a connecting pipe, one end of the connecting pipe being sealed to the bottom of the side wall of the water tank, the other end of the connecting pipe being sealed to the bottom of the sleeve, and the top of the sleeve being sealed to an air pipe connector.

[0010] Compared with existing technologies, the connecting pipe facilitates connection to the side wall of the water tank, and the sleeve can contain the turbid water that enters the sleeve due to water pressure and liquid surface sloshing, preventing this turbid water from entering the air pipe and ensuring the accuracy of liquid level detection.

[0011] In one possible implementation, the top of the sleeve is sealed to a plug, the tracheal connector is embedded in the top of the plug and sealed to the plug, and the tracheal sleeve is fixed to the top of the tracheal connector.

[0012] Compared with existing technologies, the endotracheal connector is embedded in the plug and the two are sealed together, which makes it easy to detach the endotracheal connector and the sleeve, facilitates cleaning of the inside of the sleeve, and prevents impurities from accumulating and affecting the liquid level detection results.

[0013] In one possible implementation, the sleeve is further provided with a fastener for securing the air tube to the air tube connector.

[0014] Compared with existing technologies, fasteners are used to further ensure the stability of the connection between the trachea and the trachea connector, preventing the trachea from detaching from the trachea connector during long-term use.

[0015] In one possible implementation, the fastener is a clamp, a snap ring, a clip, or a torsion spring.

[0016] In one possible implementation, the inner diameter of the sleeve gradually increases from the bottom to the top.

[0017] Compared with existing technologies, the inner diameter is gradually increased, which can accommodate some of the sewage entering the casing from the water tank and prevent sewage from entering the conduit.

[0018] In one possible implementation, the connecting pipe is fitted with a sealing nut that abuts against the inner wall of the water tank, and the connecting pipe is provided with a sealing ring that abuts against the outer wall of the water tank on the side near the water tank. The connecting pipe is provided with a limiting ring on the outer wall near the sleeve for pressing the sealing ring against the outer wall of the water tank.

[0019] Compared with existing technologies, the connecting pipe is fixed to the side wall of the water tank by the cooperation of the sealing nut and the limiting ring, and the sealing connection between the connecting pipe and the water tank is achieved by setting the sealing ring.

[0020] In one possible implementation, the system also includes multiple water level detection terminals arranged at different heights on the inner wall of the water tank, and all of the multiple water level detection terminals are electrically connected to the controller.

[0021] Compared with existing technologies, the accuracy of detection is further improved by adding a water level detection terminal.

[0022] In one possible implementation, there are three water level detection terminals.

[0023] In one possible implementation, the controller includes a main control chip, which is electrically connected to the base of a transistor via a resistor. The emitter of each transistor is grounded, and the collector of each transistor is electrically connected to a water level detection terminal via another resistor.

[0024] Compared with existing technologies, this method stabilizes the signal by setting a resistor and amplifies the signal by using a transistor, making the signal from the water level detection end more accurate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an electronic water level device for a dishwasher according to the present invention.

[0026] Figure 2 This is a block diagram of the electronic liquid level controller of an electronic water level device for a dishwasher according to the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the electronic water level sensor device for a dishwasher according to the present invention.

[0028] Figure 4This is a cross-sectional view of the water level sensor in the electronic water level sensor device for a dishwasher according to the present invention.

[0029] Figure 5 This is a circuit diagram of the electronic liquid level controller of an electronic water level device for a dishwasher according to the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Water level gauge; 11-Sleeve; 12-Connecting pipe; 13-Air pipe connector; 14-Plug; 15-Fastener; 16-Sealing nut; 17-Limiting ring; 18-Sealing ring; 2-Electronic liquid level controller; 3-Air pipe; 4-Water tank. Detailed Implementation

[0032] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0033] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0034] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1-4 As shown in the figure, this application discloses an electronic water level device for a dishwasher, including a water level device 1 fixed to the outer wall of the water tank 4 and an electronic liquid level controller 2 fixed to the cabinet.

[0037] The water level sensor 1 has a cavity that runs vertically through it. The bottom of the water level sensor 1 is sealed to the bottom of the side wall of the water tank 4, and the cavity is connected to the water tank. The top of the water level sensor 1 is sealed to an air pipe connector 13. The lower end of the air pipe connector 13 is connected to the cavity, and the upper end of the air pipe connector 13 is sealed to one end of an air pipe 3.

[0038] The electronic liquid level controller 2 includes a controller and a pressure sensor. The other end of the air pipe 3 is sealed to the pressure sensor. The pressure sensor is electrically connected to the controller, and the controller is electrically connected to the water pump motor.

[0039] The water level sensor 1 is connected to the bottom of the side wall of the water tank 4, and then connected to the air pressure sensor through the air pipe 3. By detecting the air pressure in the water level sensor 1, the actual liquid level in the water tank 4 can be detected. The controller controls the water pump motor to work according to the detected actual liquid level. The liquid level detection in the water tank is more accurate, and the water level sensor 1 isolates the water tank 4 to prevent suspended matter in the water tank 4 from entering the air pipe 3 and affecting the detection results.

[0040] In actual design, sediment will accumulate at the bottom of water tank 4 after cleaning. Existing technology includes a drain pipe at the bottom to discharge sewage and sediment, resulting in a relatively rapid water flow at the bottom of water tank 4. The water level sensor 1 is installed at the bottom of the side wall of water tank 4, but it does not need to be installed at the very bottom. For example, it can be designed to be 5cm above the bottom of the side wall of water tank 4. At this position, the water level of the water level sensor 1 is relatively stable, allowing for a larger liquid level detection height, and also preventing sediment from entering the water level sensor 1.

[0041] The water level sensor 1 includes a sleeve 11 and a connecting pipe 12 connected to the sleeve 11. One end of the connecting pipe 12 is sealed to the bottom of the side wall of the water tank 4, the other end of the connecting pipe 12 is sealed to the bottom of the sleeve 11, and the top of the sleeve 11 is sealed to the air pipe connector 13.

[0042] When the dishwasher is working, there are some suspended solids in the wastewater in the water tank 4. The water level sensor 1 is divided into a connecting pipe 12 and a sleeve 11. The connecting pipe 12 facilitates the connection to the side wall of the water tank 4. The sleeve 11 is used to contain the turbid water that enters the sleeve 11 due to water pressure and liquid surface sloshing, preventing the turbid water from entering the air pipe 3 and causing blockage. The sleeve 11 can isolate and buffer the water surface, making the air pressure detection more accurate.

[0043] To improve airtightness, the sleeve 11 and the connecting pipe 12 are integrally formed. At the same time, to save lateral space, the sleeve 11 and the connecting pipe 12 are connected in an L-shape.

[0044] In this embodiment, the top of the sleeve 11 is sealed to a plug 14, the air pipe connector 13 is embedded in the top of the plug 14 and sealed to the plug 14, and the air pipe 3 is sleeved and fixed to the top of the air pipe connector 13.

[0045] By setting the plug 14, the top of the sleeve 11 can be detached, which makes it convenient for the air pipe connector 13 to be installed on the sleeve 11. The detachable structure also makes it convenient to clean the inside of the sleeve 11 after disassembly, preventing impurities in the sewage from accumulating on the inner wall of the sleeve 11.

[0046] The endotracheal connector 13 is embedded in the plug 14, meaning that the bottom of the endotracheal connector 13 extends through the plug 14 into the cavity, and the top of the endotracheal connector 13 is above the plug 14. At the same time, the endotracheal connector 13 and the plug 14 are sealed together, which facilitates the detachable connection between the endotracheal connector 13 and the sleeve 11. After long-term use, the plug 14 and the sleeve 11 can be disassembled to facilitate cleaning of the inside of the sleeve 11 and prevent impurities from accumulating on the inner wall of the sleeve 11, which would affect the liquid level detection results.

[0047] The plug 14 can be an existing capped internal thread plug, which is then fitted onto the outer wall of the sleeve 11. The internal thread of the capped internal thread plug and the external thread of the sleeve 11 are used to achieve a threaded connection, and PTFE tape is provided at the connection point to achieve a sealed connection between the capped internal thread plug and the sleeve 11. Alternatively, the plug 14 can be an existing capped external thread plug, which is then installed inside the sleeve 11. The external thread of the capped external thread plug and the internal thread of the sleeve 11 are used to achieve a threaded connection, and PTFE tape is provided at the connection point to achieve a sealed connection between the capped external thread plug and the sleeve 11.

[0048] In this embodiment, to achieve better airtightness between the endotracheal connector 13 and the plug 14, the endotracheal connector 13 and the plug 14 can be integrally molded. Integral molding reduces the number of connecting structures, provides better airtightness, prevents air leakage, and allows for more accurate liquid level detection.

[0049] To prevent the connection between the trachea 3 and the trachea connector 13 from breaking, the sleeve 11 is also provided with a fastener 15 for fixing the connection between the trachea 3 and the trachea connector 13. By setting the fastener 15, the stability of the connection between the trachea 3 and the trachea connector 13 is further ensured, preventing the trachea 3 from detaching from the trachea connector 13 during long-term use and ensuring airtightness.

[0050] The fastener 15 can be a clamp, a snap ring, a clip, or a torsion spring. In this embodiment, the fastener 15 is a torsion spring.

[0051] In actual use, the other end of the air tube 3 is connected to the air pressure sensor. In order to further ensure the stable connection between the air tube 3 and the air pressure sensor, fasteners such as torsion springs 15 can be set at the connection position to strengthen the connection and ensure airtightness.

[0052] In this embodiment, the inner diameter of the sleeve 11 gradually increases from the bottom to the top. The gradual increase in inner diameter gives the sleeve 11 a larger capacity, allowing it to accommodate a portion of the sewage entering from the water tank 4, thus preventing sewage from entering the air pipe 3.

[0053] In this embodiment, the connecting pipe 12 and the water tank 4 need to be sealed together. Specifically, the connecting pipe 12 is fitted with a sealing nut 16 that abuts against the inner wall of the water tank 4. The connecting pipe 12 is provided with a sealing ring 18 that abuts against the outer wall of the water tank 4 on the side near the water tank 4. The connecting pipe 12 is provided with a limiting ring 17 on the outer wall near the sleeve 11 for pressing the sealing ring 18 against the outer wall of the water tank 4.

[0054] The sealing ring 18 is fitted in front of the limiting ring 17. After one end of the connecting pipe 12 passes through the water tank 4, the sealing ring 18 abuts against the outer wall of the water tank 4. Inside the water tank 4, the sealing nut 16 is fitted onto the end of the connecting pipe 12 and tightened. Together with the limiting ring 17 outside the water tank 4, the connecting pipe 12 and the water tank 4 are sealed together.

[0055] In this embodiment, an electronic water level sensor for a dishwasher further includes multiple water level detection terminals arranged at different heights on the inner wall of the water tank 4, all of which are electrically connected to a controller. By setting multiple water level detection terminals, the liquid level in the water tank 4 can also be estimated.

[0056] In this embodiment, there are three water level detection terminals.

[0057] See Figure 5 As shown, the electronic liquid level controller 2 of this application includes a pressure stabilizing module, a main control module, a water level detection module, and a pressure detection module. The pressure stabilizing module, main control module, and water level detection module are integrated within the controller. The pressure detection module includes a pressure sensor and an amplifier circuit. The pressure sensor detects the pressure change within the pressure level sensor 1 and is connected to the main control module of the controller via the amplifier circuit. Any existing high-precision pressure sensor capable of detecting air pressure will suffice; further details are omitted here.

[0058] The voltage regulator module stabilizes the power supply to the voltage required by the main control module. The main control module includes a main control chip, which processes the air pressure value detected by the air pressure sensor and amplified by the amplifier circuit. Based on the air pressure value, the main control chip controls whether the water pump motor operates and for how long (if the detected air pressure value is lower than the preset air pressure, the water pump motor starts; until the detected air pressure value is higher than the preset air pressure, the water pump motor stops). The output terminal of the voltage regulator module is electrically connected to the power supply terminal of the main control chip.

[0059] The voltage regulator module circuit is as follows: The voltage regulator circuit includes a voltage regulator chip U3. The input terminal of the voltage regulator chip U3 is electrically connected to the power supply. The input terminal of the voltage regulator chip U3 is grounded through capacitor C9 and electrolytic capacitor C7 respectively. The output terminal of the voltage regulator chip U3 is electrically connected to the power supply terminal of the main control chip through inductor L1. The output terminal of the voltage regulator chip U3 is grounded through capacitor C5 and electrolytic capacitor C8 respectively. The power supply terminal of the main control chip is grounded through electrolytic capacitor C13.

[0060] The water level detection module includes three water level detection terminals, each of which is electrically connected to the main control chip. The circuit of the water level detection module is as follows: the main control chip is electrically connected to the base of a transistor through a resistor, the emitter of each transistor is grounded, and the collector of each transistor is electrically connected to a water level detection terminal through another resistor.

[0061] In this embodiment, to facilitate recording the changes in the liquid level in the water tank 4 during the actual washing process of the dishwasher, the main control chip is also electrically connected to a memory for storing real-time information on the liquid level in the water tank 4. By reading the information in the memory, the changes in the liquid level in the water tank 4 during each washing period can be known, which facilitates subsequent adjustments to the water pump motor's water supply to the water tank 4.

[0062] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0063] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic water level sensor device for a dishwasher, characterized in that, Includes a water level sensor (1) fixed to the outer wall of the water tank (4) and an electronic liquid level controller (2) fixed to the cabinet; The water level device (1) has a cavity that runs vertically through it. The bottom of the water level device (1) is sealed to the bottom of the side wall of the water tank (4), and the cavity is connected to the water tank. The top of the water level device (1) is sealed to a ventilator (13). The lower end of the ventilator (13) is connected to the cavity, and the upper end of the ventilator (13) is sealed to one end of a ventilator (3). The electronic liquid level controller (2) includes a controller and a pressure sensor. The other end of the air pipe (3) is sealed to the pressure sensor. The pressure sensor is electrically connected to the controller, and the controller is electrically connected to the water pump motor.

2. The electronic water level sensor device for a dishwasher according to claim 1, characterized in that, The water level sensor (1) includes a sleeve (11) and a connecting pipe (12). One end of the connecting pipe (12) is sealed to the bottom of the side wall of the water tank (4), and the other end of the connecting pipe (12) is sealed to the bottom of the sleeve (11). The top of the sleeve (11) is sealed to the air pipe connector (13).

3. The electronic water level device for a dishwasher according to claim 2, characterized in that, The top of the sleeve (11) is sealed to a plug (14), the air pipe connector (13) is embedded in the top of the plug (14), and the air pipe connector (13) is sealed to the plug (14). The air pipe (3) is sleeved and fixed to the top of the air pipe connector (13).

4. The electronic water level device for a dishwasher according to claim 2 or 3, characterized in that, The sleeve (11) is also provided with a fastener (15) for fixing the connection between the air pipe (3) and the air pipe connector (13).

5. The electronic water level device for a dishwasher according to claim 4, characterized in that, The fastener (15) is a clamp, a ring, a clip, or a torsion spring.

6. The electronic water level device for a dishwasher according to claim 2, characterized in that, The inner diameter of the sleeve (11) gradually increases from the bottom to the top.

7. The electronic water level device for a dishwasher according to claim 2, characterized in that, The connecting pipe (12) is fitted with a sealing nut (16) that abuts against the inner wall of the water tank (4). The connecting pipe (12) is provided with a sealing ring (18) that abuts against the outer wall of the water tank (4) on the side near the water tank (4). The connecting pipe (12) is provided with a limiting ring (17) on the outer wall near the sleeve (11) for pressing the sealing ring (18) against the outer wall of the water tank (4).

8. The electronic water level device for a dishwasher according to claim 1, characterized in that, It also includes multiple water level detection terminals arranged at different heights on the inner wall of the water tank (4), and all of the multiple water level detection terminals are electrically connected to the controller.

9. The electronic water level device for a dishwasher according to claim 8, characterized in that, There are three water level detection terminals.

10. The electronic water level device for a dishwasher according to claim 8 or 9, characterized in that, The controller includes a main control chip, which is electrically connected to the base of a transistor through a resistor. The emitter of each transistor is grounded, and the collector of each transistor is electrically connected to a water level detection terminal through another resistor.

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