Screw type automatic liquid feeding mechanism

Abstract

A screw type automatic liquid feeding mechanism comprises a liquid storage tank mounted on a door plate of a dish-washing machine, a liquid feeding box is mounted below the liquid storage tank, an outer cavity of the liquid feeding box is partially exposed on the inner wall of the door plate and communicated with an inner cavity of the dish-washing machine, and an automatic liquid feeding module is mounted between the liquid storage tank and the liquid feeding box and comprises a long-strip-shaped cavity. A liquid inlet head connected with the liquid storage tank is arranged at one end of the cavity, a liquid outlet head connected with the liquid feeding box is arranged at the other end of the cavity, a screw rod is arranged in the cavity, and when the screw rod rotates, cleaning liquid in the liquid storage tank can gradually move to an outer cavity of the liquid feeding box through a gap between the screw rod and the cavity, and is applied after being washed by water. The automatic liquid feeding device is used for automatic liquid feeding of cleaning liquid of the dish washing machine, and the rotating angle of the screw is in direct proportion to the discharge amount of the cleaning liquid, so that the liquid feeding amount can be accurately controlled by controlling the rotating angle of the screw, the purpose of accurately using the liquid is achieved, and waste is avoided. The device has the advantages of simple structure, convenience in operation and low cost.

Description

Technical Field

[0001] The utility model relates to an accessory of a dishwasher, in particular to a mechanism for automatically feeding cleaning liquid into the dishwasher. Background Art

[0002] The dishwasher is a very practical cleaning tool. It can effectively remove dirt and bacteria inside the dishwasher, thereby ensuring the hygiene and cleanliness of the dishes. Currently, most dishwashers on the market require manual addition of cleaning liquid. Every time you wash dishes, you need to pour the dishwasher cleaning liquid into the detergent box inside the dishwasher. The amount of dishwasher detergent to be used is determined according to the product manual. We need to read the manual carefully and use the appropriate amount of detergent as required, so the operation is very troublesome.

[0003] The Patent Office disclosed on November 25, 2022, a quantitative detergent dispenser with patent number 202210965199.6, including a detergent delivery box, a detergent storage chamber and a transmission mechanism adapted to be installed with the detergent delivery box; the transmission mechanism and the detergent storage chamber are both provided with a one-way circulation valve; the detergent delivery box is provided with a liquid injection port and a liquid outlet, and the liquid injection port is one-way connected with the detergent storage chamber; the detergent storage chamber, the transmission mechanism and the liquid outlet are one-way connected in sequence through the one-way circulation valve, and the transmission mechanism and the one-way circulation valve cooperate with each other to make the detergent quantitatively output from the liquid outlet, and through the cooperation of the one-way circulation valve, the transmission mechanism, the detergent storage chamber and the detergent delivery box, the detergent circulates in the set direction and is quantitatively delivered. This structure realizes quantitative liquid delivery by means of a piston, and its actual usage can only be an integer multiple of the capacity of the piston cavity, and it is impossible to truly achieve precise liquid delivery. Summary of the invention

[0004] The purpose of the utility model is to provide a screw-type automatic liquid dosing mechanism for automatically dosing liquid and accurately using liquid, which is used for dosing liquid in a dishwasher, in view of the defects and shortcomings of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: the screw-type automatic liquid dosing mechanism includes a liquid storage box installed on the door panel of the dishwasher, a liquid dosing box is installed below the liquid storage box, the outer cavity of the liquid dosing box is partially exposed to the inner wall of the door panel and communicated with the inner cavity of the dishwasher, an automatic liquid dosing module is installed between the liquid storage box and the liquid dosing box, the automatic liquid dosing module includes a long strip of cavity, one end of the cavity is provided with a liquid inlet head connected to the liquid storage tank, and the other end is provided with a liquid outlet head connected to the liquid dosing box, a screw is provided in the cavity, when the screw rotates, the cleaning liquid in the liquid storage tank can pass through the gap between the screw and the cavity, gradually move to the outer cavity of the liquid dosing box, and be used after being flushed with water.

[0006] A one-way valve is installed at the outer end of the liquid outlet head of the cavity. Under the action of the screw thrust, the cleaning liquid opens the one-way valve and then enters the liquid injection box.

[0007] The one-way valve includes a valve core that can block the liquid outlet of the liquid outlet head of the cavity. A spring seat is arranged outside the valve core. The spring seat is fixed on the liquid injection box through a connecting rib. A compression spring is arranged between the spring seat and the valve core.

[0008] A liquid outlet channel is arranged in the liquid injection box. The liquid outlet head of the cavity is inserted into the liquid outlet channel. A liquid outlet sealing ring is arranged between the liquid outlet head and the liquid outlet channel.

[0009] An opening is arranged at the end of the cavity. The screw can be inserted into the cavity from the opening. A motor with a speed reducer is installed outside the opening of the cavity. The outer end of the screw is connected to the speed reducer, so that the screw and the motor are linked.

[0010] A screw sealing ring is arranged between the screw and the inner wall of the outlet of the cavity.

[0011] A discharge port is arranged at the bottom of the liquid storage tank. The liquid inlet head of the cavity is sleeved outside the discharge port. An inlet liquid sealing ring is installed between the inner wall of the liquid inlet head and the outer wall of the discharge port.

[0012] A liquid level sensor is arranged on the side of the bottom of the liquid storage tank. The liquid level sensor adopts multi-pole capacitive induction. A plurality of pole pieces are placed at different positions in the liquid storage tank, and data collection of the output signals of the pole pieces is carried out.

[0013] The outer cavity of the liquid injection box is covered with a cover plate. A plurality of through holes are arranged on the cover plate, so that the outer cavity of the liquid injection box is communicated with the inner cavity of the dishwasher.

[0014] A filling port for the cleaning liquid is arranged on the liquid storage tank. The filling port is located in the liquid injection box. A port sealing ring is arranged at the filling port. An annular rib is arranged on the cover plate. After the cover plate of the liquid injection box is covered, the annular rib abuts against the port sealing ring to axially seal the filling port.

[0015] The utility model is used for the automatic liquid injection of the cleaning liquid of the dishwasher. The motor controls the rotation of the screw, which can push the cleaning liquid to move unidirectionally, so that the cleaning liquid in the liquid storage tank enters the outer cavity of the liquid injection box and is applied after being washed by water. Since the rotation angle of the screw is proportional to the discharge amount of the washing liquid, the amount of liquid injection can be accurately controlled by controlling the rotation angle of the screw, so as to achieve the purpose of accurate liquid use and avoid waste. It has the advantages of simple structure, convenient operation and low cost. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the utility model.

[0017] Figure 2This is a schematic diagram of the structure of another angle of the present utility model.

[0018] Figure 3 This is a structural cross-sectional view of the position of the filling port of the cleaning liquid of the present utility model.

[0019] Figure 4 This is a structural cross-sectional view of the cavity position of the present utility model.

[0020] Figure 5 This is a structural cross-sectional view of the position of the liquid inlet head of the cavity of the present utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the automatic liquid injection module of the present utility model.

[0022] Figure 7 This is an exploded view of the structure of the automatic liquid injection module of the present utility model. Detailed implementation manners

[0023] As Figure 1 、 Figure 2 shown, the present utility model is a screw 32 type automatic liquid injection mechanism, including a liquid storage tank 10 installed on the door panel of the dishwasher. When the door panel of the dishwasher is closed, the liquid storage tank 10 is in an upright state, and the cleaning liquid will accumulate at the bottom of the liquid storage tank 10. A liquid level sensor 11 is provided on the side of the bottom of the liquid storage tank 10 for measuring the cleaning liquid capacity of the liquid storage tank 10. Due to the high viscosity and weak fluidity of the cleaning liquid, the detection requires a long waiting time, and there may be abnormal detection results due to its viscosity. Therefore, the liquid level sensor 11 adopts a multi-pole capacitor type induction. A plurality of poles are placed at different positions in the liquid storage tank 10. Through data acquisition of the output signals of the poles, after passing through the filtering part and calibration algorithm, initial effective data is obtained, and then the effective data is analyzed and characteristic values such as amplitude and frequency are extracted for comprehensive determination. In addition, the liquid level sensor 11 can also adopt an ultrasonic compensation unit, a light sensing distance measurement compensation unit, a mass compensation unit for gain compensation, a temperature compensation unit for gain compensation, etc., to realize the liquid level measurement of the cleaning liquid with high viscosity. A filling port 14 for the cleaning liquid is provided on the liquid storage tank 10. When the cleaning liquid is insufficient, the cleaning liquid can be added to the liquid storage tank 10 from the filling port 14.

[0024] A liquid injection box 20 is installed below the liquid storage tank 10, and a part of the outer cavity 23 of the liquid injection box 20 is exposed on the inner wall of the door panel. A cover plate 21 is installed on the outside of the outer cavity 23 of the liquid injection box 20, and a plurality of through holes 22 are opened on the cover plate 21 to communicate the outer cavity 23 of the liquid injection box 20 with the inner cavity of the dishwasher. An automatic liquid injection module 30 is installed between the liquid storage tank 10 and the liquid injection box 20. The automatic liquid injection module 30 can transport the cleaning liquid from the liquid storage tank 10 to the outer cavity 23 of the liquid injection box 20. When the cleaning liquid enters the outer cavity 23 of the liquid injection box 20, it is applied after being washed by water.

[0025] As Figure 3 shown, the filling port 14 of the liquid storage tank 10 is located inside the liquid injection box 20. A port sealing ring 15 is provided at the filling port 14, and an annular rib 25 is provided on the cover plate 21. After the cover plate 21 of the liquid injection box 20 is closed, the annular rib 25 abuts against the port sealing ring 15 to axially seal the filling port 14. Therefore, after the cover plate 21 of the liquid injection box 20 is closed, it can simultaneously close the filling port 14, and when the cover plate 21 of the liquid injection box 20 is opened, the filling port 14 can also be exposed.

[0026] As Figure 4 shown, the automatic liquid injection module 30 includes a long strip-shaped cavity 31. One end of the cavity 31 is provided with a liquid inlet head 35 connected to the liquid storage tank 10, and the other end is provided with a liquid outlet head 33 connected to the liquid injection box 20. A screw 32 is provided inside the cavity 31. When the screw 32 rotates, the cleaning liquid in the liquid storage tank 10 can pass through the gap between the screw 32 and the cavity 31 and gradually move to the outer cavity 23 of the liquid injection box 20.

[0027] An outlet channel 26 communicating with the outer cavity 23 is provided inside the liquid injection box 20. The liquid outlet head 33 of the cavity 31 is inserted into the outlet channel 26, and a liquid outlet sealing ring 38 is provided between the liquid outlet head 33 and the outlet channel 26 to prevent leakage outside the liquid injection box 20 after liquid discharge. A one-way valve 50 is installed at the outer end of the liquid outlet head 33 of the cavity 31. The cleaning liquid enters the liquid injection box 20 after pushing open the one-way valve 50 under the thrust of the screw 32. The one-way valve 50 includes a valve core 51 that can block the liquid outlet of the liquid outlet head 33 of the cavity 31. A spring seat 52 is provided outside the valve core 51, and the spring seat 52 is fixed to the end of the outlet channel 26 of the liquid injection box 20 through a connecting rib 24. A compression spring 53 is provided between the spring seat 52 and the valve core 51, and the restoring force of the compression spring 53 enables the valve core 51 to keep blocking the liquid outlet of the liquid outlet head 33. When the cleaning liquid overcomes the restoring force of the compression spring 53 under the thrust of the screw 32 and pushes the valve core 51 away from the liquid outlet of the liquid outlet head 33, the cleaning liquid passes through the outlet channel 26 communicating with the outer cavity 23 of the liquid injection box 20, and the cleaning liquid is obtained for application after being rinsed with water.

[0028] As Figure 5 shown, a discharge port 12 is provided at the bottom of the liquid storage tank 10. The liquid inlet head 35 of the cavity 31 is sleeved outside the discharge port 12. After the dishwasher door panel is closed, the liquid storage tank 10 is in an upright state, and the cleaning liquid in the liquid storage tank 10 accumulates above the discharge port 12. When part of the cleaning liquid is discharged from the automatic liquid injection module 30, the cleaning liquid in the liquid storage tank 10 enters the automatic liquid injection module 30 under the action of gravity and air pressure to fill the gap after part of the cleaning liquid is discharged. An inlet sealing ring 13 is installed between the inner wall of the liquid inlet head 35 and the outer wall of the discharge port 12 of the liquid storage tank 10 to prevent leakage outside the liquid inlet head 35.

[0029] As Figure 6 , Figure 7 shown, an opening is provided at the end of the cavity 31, and the screw 32 can be inserted into the cavity 31 from the opening. A motor 40 with a speed reducer is installed outside the opening of the cavity 31. The outer end of the screw 32 is connected to the speed reducer, so that the screw 32 and the motor 40 are linked. A screw seal ring 36 is provided between the outer end of the screw 32 and the inner wall of the outlet of the cavity 31 for sealing the opening of the cavity 31. The speed reducer includes a box body 43 and a box cover 44. The box cover 44 is connected to the outer end of the opening of the cavity 31 through a flange. A limit piece 37 is also sleeved on the screw 32. The limit piece 37 is clamped at the flange connection between the box cover 44 and the cavity 31 for axial limitation of the screw 32. A double-layer wheel 42 is arranged in the box body 43 and the box cover 44. The output shaft of the motor 40 and the outer end of the screw 32 extend into the speed reducer. A worm 41 is installed on the output shaft of the motor 40, and a large gear 34 is installed at the outer end of the screw 32. One layer of the double-layer wheel 42 is a worm gear meshing with the worm 41, and the other layer of the double-layer wheel 42 is a small gear meshing with the large gear 34. Therefore, the screw 32 can be linked with the motor 40.

[0030] The outer diameter of the screw 32 is slightly smaller than the inner diameter of the cavity 31. Therefore, when the screw 32 rotates, it can push the cleaning liquid in the cavity 31 to move along the gap between the screw 32 and the cavity 31. The rotation angle of the screw 32 is proportional to the discharge amount of the cleaning liquid. Therefore, by controlling the rotation angle of the screw 32, the amount of liquid input can be accurately controlled, so as to achieve the purpose of accurate liquid use and avoid waste.

Claims

1. A screw-type automatic liquid dosing mechanism, comprising a liquid storage tank mounted on the door panel of a dishwasher, a liquid dosing box mounted below the liquid storage tank, the outer cavity of the liquid dosing box partially exposed on the inner wall of the door panel and communicated with the inner cavity of the dishwasher, characterized in that An automatic liquid dosing module is installed between the liquid storage tank and the liquid dosing box. The automatic liquid dosing module includes a long strip-shaped cavity. One end of the cavity is provided with a liquid inlet head connected to the liquid storage tank, and the other end is provided with a liquid outlet head connected to the liquid dosing box. A screw is provided in the cavity. When the screw rotates, the cleaning liquid in the liquid storage tank can pass through the gap between the screw and the cavity and gradually move to the outer cavity of the liquid dosing box, and be used after being flushed with water.

2. A screw-type automatic liquid dispensing mechanism according to claim 1, characterized in that A one-way valve is installed at the outer end of the liquid outlet head of the cavity, and the cleaning liquid pushes the one-way valve open under the thrust of the screw and then enters the liquid feeding box.

3. A screw-type automatic liquid dispensing mechanism according to claim 2, characterized in that The one-way valve comprises a valve core capable of blocking the liquid outlet of the cavity liquid outlet head, a spring seat is arranged outside the valve core, the spring seat is fixed on the liquid injection box through a connecting rib, and a compression spring is arranged between the spring seat and the valve core.

4. A screw-type automatic liquid dispensing mechanism according to claim 2, characterized in that A liquid outlet channel is arranged in the liquid feeding box, a liquid outlet head of the cavity is inserted into the liquid outlet channel, and a liquid outlet sealing ring is arranged between the liquid outlet head and the liquid outlet channel.

5. A screw-type automatic liquid dispensing mechanism according to any one of claims 1 to 4, characterized in that The end of the cavity is provided with an opening, and the screw can be inserted into the cavity from the opening. A motor with a reduction box is installed outside the cavity opening, and the outer end of the screw is connected to the reduction box, so that the screw and the motor are linked.

6. A screw-type automatic liquid dispensing mechanism according to claim 5, characterized in that A screw sealing ring is arranged between the screw and the inner wall at the outlet of the cavity.

7. A screw-type automatic liquid dispensing mechanism according to any one of claims 1 to 4, characterized in that The bottom of the liquid storage box is provided with a discharge port, the liquid inlet head of the cavity is sleeved on the outside of the discharge port, and a liquid inlet sealing ring is installed between the inner wall of the liquid inlet head and the outer wall of the discharge port.

8. A screw-type automatic liquid dispensing mechanism according to any one of claims 1 to 4, characterized in that A liquid level sensor is arranged on the bottom side of the liquid storage tank. The liquid level sensor adopts multi-electrode capacitive sensing. Multiple electrodes are placed at different positions in the liquid storage tank to collect data through the output signals of the electrodes.

9. A screw-type automatic liquid dispensing mechanism according to any one of claims 1 to 4, characterized in that The outer side of the outer cavity of the liquid dosing box is covered with a cover plate, and a plurality of through holes are opened on the cover plate, so that the outer cavity of the liquid dosing box is communicated with the inner cavity of the dishwasher.

10. The screw-type automatic liquid dispensing mechanism according to claim 9, characterized in that The liquid storage tank is provided with a filling port for cleaning liquid, which is located in the liquid injection box. A port sealing ring is provided at the filling port, and an annular rib is provided on the cover plate. After the cover plate of the liquid injection box is closed, the annular rib and the port sealing ring are abutted to axially close the filling port.

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