Automatic dosing device

Abstract

The utility model discloses a constant volume type automatic feeding device, including main inlet valve and water storage tank, be equipped with detachable installation's liquid storage box in water storage tank, the top of liquid storage box is equipped with the water route board subassembly of communication with water storage tank, be equipped with constant volume chamber between main inlet valve and water storage tank, and the top of constant volume chamber is equipped with the venturi tube, and the venturi tube is connected main inlet valve and water storage tank respectively, and the open end of liquid storage box is equipped with check valve subassembly, and when liquid storage box installs in water storage tank, constant volume chamber and liquid storage box are connected with each other, be equipped with the ball float subassembly for controlling liquid storage box and constant volume chamber conduction state in constant volume chamber, when liquid storage box installs in water storage tank, check valve subassembly is in the open state, the utility model discloses through the gravity and put the detergent in liquid storage box into constant volume chamber, and then utilize the water flow and pass through the venturi tube and produce the negative pressure, thereby will the detergent in constant volume chamber suck and put into the water route board subassembly, simple structure is reliable, and can continue constant quantity and draw the detergent.

Description

Technical Field

[0001] This utility model belongs to the technical field of washing machine accessories, specifically relating to a fixed-volume automatic dispensing device. Background Technology

[0002] Existing washing machines and dishwashers all employ automatic detergent dispensing devices. These devices require pre-filling the detergent solution in a storage box, and during washing, the detergent solution is extracted from the storage box and added to the washing tub. A patent with publication number CN210341412U discloses an automatic detergent dispensing device, comprising a main inlet pipe, a spray pipe, a connecting pipe, and a storage chamber. The main inlet pipe has an inlet valve and a venturi tube installed sequentially from the inlet to the outlet. The spray pipe has a spray valve, a temporary storage chamber, and a switching valve installed sequentially from the inlet to the outlet. The switching valve is connected to the storage chamber. The spray pipe, located between the spray valve and the temporary storage chamber, is connected to the connecting pipe. The other end of the connecting pipe is connected to the negative pressure port of the venturi tube. The outlets of the main inlet pipe and the spray pipe are connected to the washing tub. The connecting pipe or spray pipe is equipped with a flow meter capable of detecting the amount of liquid entering the venturi tube from the temporary storage chamber. Existing automatic detergent dispensing devices have numerous control components, resulting in high manufacturing costs. Furthermore, the interconnections between the spray valve, storage chamber, and switching valve are quite precise, making them prone to malfunctions during connection. Therefore, a constant-volume automatic dispensing device is needed to overcome these difficulties. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing a constant-volume automatic dispensing device. This invention uses gravity to dispense detergent from the storage box into the constant-volume chamber, and then uses water flow through the Venturi tube to generate negative pressure, thereby drawing the detergent from the constant-volume chamber into the water circuit board assembly. The structure is simple and reliable, and can continuously and quantitatively extract detergent.

[0004] The objective of this invention is achieved through the following technical solution: a constant-volume automatic dispensing device, comprising a main inlet valve and a water storage tank, wherein a detachable liquid storage box is provided inside the water storage tank, and a water circuit board assembly communicating with the water storage tank is provided above the liquid storage box; a constant-volume chamber is provided between the main inlet valve and the water storage tank, and a Venturi tube is provided at the top of the constant-volume chamber, the Venturi tube being connected to the main inlet valve and the water storage tank respectively; a one-way valve assembly is provided at the open end of the liquid storage box, and the constant-volume chamber and the liquid storage box are interconnected when the liquid storage box is installed in the water storage tank; a float assembly for controlling the conduction state between the liquid storage box and the constant-volume chamber is provided inside the constant-volume chamber; the one-way valve assembly is in the open state when the liquid storage box is installed in the water storage tank.

[0005] Preferably, the water storage tank is provided with an intermediate flow channel, which is located between the Venturi tube and the water circuit board assembly; one end of the intermediate flow channel is connected to the outlet end of the Venturi tube, and the other end of the intermediate flow channel is connected to the inlet end of the water circuit board assembly.

[0006] Preferably, one end of the Venturi tube is sealed to the main inlet valve, and the other end of the Venturi tube is sealed to the intermediate flow channel; the Venturi tube is provided with a negative pressure suction pipe that communicates with the constant volume chamber; the negative pressure suction pipe is arranged in a vertical direction and extends to the bottom of the constant volume chamber.

[0007] When the main inlet valve adds water to the water tank, the water flows along the Venturi tube into the middle channel of the water tank, then along the middle channel into the water circuit board assembly, and finally into the washing machine drum. Because there is a negative pressure suction pipe between the Venturi tube and the constant volume chamber, the constant volume chamber temporarily stores detergent. When the water flows through the Venturi tube, a negative pressure is generated inside the Venturi tube, so the detergent in the constant volume chamber will enter the Venturi tube along the negative pressure suction pipe, and then the detergent and water will enter the water circuit board assembly at the same time.

[0008] Preferably, the volume-fixing chamber is provided with a first flow channel, and a float assembly is installed in the first flow channel; the float assembly includes a first seal and a float body, the first seal is fixedly installed in the first flow channel; the float body is slidably installed in the first flow channel, and the float body is disposed between the first seal and the bottom of the volume-fixing chamber; a second flow channel is provided on the side of the volume-fixing chamber, and the second flow channel extends into the liquid storage box; a negative pressure suction pipe is provided in the volume-fixing chamber, the negative pressure suction pipe is interconnected with the first flow channel, and the first flow channel and the second flow channel are interconnected.

[0009] Preferably, the first flow channel has a step, and the first seal is fixedly installed on the step; the second flow channel and the first flow channel are staggered vertically, with the bottom of the second flow channel being higher than that of the first flow channel; and a plurality of evenly distributed second seals are provided between the second flow channel and the liquid storage box.

[0010] Preferably, the bottom of the first flow channel is provided with a discharge hole, which is connected to the negative pressure suction pipe.

[0011] Preferably, the liquid storage box is provided with a one-way valve assembly, which includes a valve core, a spring, and a rubber core; the bottom of the liquid storage box is provided with an installation channel, and the one-way valve assembly is provided in the installation channel; the installation channel is in communication with the constant volume chamber, and the two are sealed together.

[0012] Preferably, a rubber core is fixedly installed on the end of the valve core facing the liquid storage box; a spring is installed on the valve core; a second flow channel extending into the installation channel is provided in the constant volume chamber, and a second seal is provided between the second flow channel and the installation channel; one end of the spring abuts against the protrusion of the valve core, and the other end of the spring abuts against the inner wall of the second flow channel; the rubber core is disposed in the liquid storage box, and the rubber core is positioned facing the opening end of the second flow channel.

[0013] Preferably, the liquid storage box is provided with a limiting step, which is positioned towards the opening end of the second flow channel; when the liquid storage box is installed in the water storage tank, the rubber core is positioned away from the opening end of the second flow channel.

[0014] Preferably, the top of the constant volume chamber is provided with a vent hole, which is connected to the outside atmosphere.

[0015] When the reservoir is removed from the water tank, and new detergent is added, the spring is compressed during removal, causing the rubber core at the end of the valve to block the bottom opening of the reservoir, preventing detergent from overflowing. The water tank and reservoir are secured using a standard snap-fit ​​connection, which will not be discussed further. When the reservoir is installed in the water tank, the end of the valve core is pressed by the end of the second flow channel in the constant volume chamber, causing the valve core and rubber core to move into the reservoir. This opens the one-way valve assembly, allowing the reservoir and the second flow channel to communicate. The second flow channel is positioned higher than the bottom of the first flow channel. Under the influence of gravity, the detergent in the storage box flows into the constant volume chamber along the second flow channel. Since the first flow channel has a discharge hole at its bottom, the detergent continuously enters the constant volume chamber, causing the liquid level to rise. The float then rises with the liquid level. When the float contacts the first seal, it blocks the first and second flow channels, preventing further detergent entry into the constant volume chamber. When the main inlet valve adds water to the storage tank, a negative pressure is generated in the venturi tube, drawing the detergent into the water circuit board assembly. As the detergent level in the constant volume chamber decreases, the liquid level drops, causing the float to descend and reconnecting the first and second flow channels. The detergent can then flow back from the storage box into the constant volume chamber. Repeating these steps allows for a continuous, metered supply of detergent to the water circuit board assembly. A vent is provided to balance the pressure within the constant volume chamber, ensuring that detergent can flow from the storage box into the constant volume chamber.

[0016] Compared with the prior art, this utility model has the following advantages: 1. By setting a constant volume chamber and a liquid storage box, and providing a Venturi tube on the constant volume chamber, the detergent can be automatically drawn into the water circuit board assembly when water is supplied from the main inlet valve to the water storage tank, eliminating the need for an additional extraction device and reducing manufacturing costs; 2. By setting a float assembly in the constant volume chamber, the float body can move up and down with the liquid level, thereby facilitating the control of the flow between the constant volume chamber and the liquid storage box, allowing for the quantitative extraction of detergent each time; 3. By setting a one-way valve assembly on the liquid storage box, liquid backflow into the liquid storage box is prevented, making the structure safer and more reliable. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 for Figure 2 A cross-sectional view after being cut open at point AA and rotated 180 degrees;

[0020] Figure 4 for Figure 3 A magnified view of the area at position C in the middle;

[0021] Figure 5 for Figure 2 A cross-sectional view after cutting through section BB;

[0022] Figure 6 for Figure 5 A magnified view of the area at position D in the middle;

[0023] Figure 7 A schematic diagram showing the float in its rising position;

[0024] Figure 8 for Figure 7 A magnified view of the area at position E in the middle;

[0025] The diagram shows the following markings: 1. Main inlet valve; 2. Water storage tank; 3. Liquid storage box; 31. Installation channel; 32. Limiting step; 4. Water circuit board assembly; 5. Volumetric chamber; 6. Venturi tube; 7. One-way valve assembly; 71. Valve core; 72. Spring; 73. Rubber core; 8. Float assembly; 81. First seal; 82. Float body; 9. Intermediate flow channel; 10. Negative pressure suction pipeline; 11. First flow channel; 12. Second flow channel; 13. Second seal; 14. Discharge port; 15. Vent. Detailed Implementation

[0026] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0027] like Figures 1 to 8 As shown, this embodiment discloses a constant-volume automatic dispensing device, including a main inlet valve 1 and a water storage tank 2. A detachable liquid storage box 3 is provided inside the water storage tank 2. A water circuit board assembly 4, communicating with the water storage tank 2, is located above the liquid storage box 3. A constant-volume chamber 5 is provided between the main inlet valve 1 and the water storage tank 2. A Venturi tube 6 is located at the top of the constant-volume chamber 5, and the Venturi tube 6 is connected to both the main inlet valve 1 and the water storage tank 2. A one-way valve assembly 7 is provided at the open end of the liquid storage box 3. When the liquid storage box 3 is installed in the water storage tank 2, the constant-volume chamber 5 and the liquid storage box 3 are interconnected. A float assembly 8 is provided inside the constant-volume chamber 5 to control the connection state between the liquid storage box 3 and the constant-volume chamber 5. When the liquid storage box 3 is installed in the water storage tank 2, the one-way valve assembly 7 is in the open state.

[0028] The water storage tank 2 is provided with an intermediate flow channel 9, which is located between the Venturi tube 6 and the water circuit board assembly 4. One end of the intermediate flow channel 9 is connected to the outlet end of the Venturi tube 6, and the other end of the intermediate flow channel 9 is connected to the inlet end of the water circuit board assembly 4. One end of the Venturi tube 6 is sealed and connected to the main water inlet valve 1, and the other end of the Venturi tube 6 is sealed and connected to the intermediate flow channel 9. The Venturi tube 6 is provided with a negative pressure suction pipe 10 that is connected to the constant volume chamber 5. The negative pressure suction pipe 10 is arranged vertically and extends to the bottom of the constant volume chamber 5.

[0029] The volume-regulating chamber 5 is provided with a first flow channel 11, and a float assembly 8 is installed in the first flow channel 11. The float assembly 8 includes a first seal 81 and a float body 82. The first seal 81 is fixedly installed in the first flow channel 11. The float body 82 is slidably installed in the first flow channel 11 and is located between the first seal 81 and the bottom of the volume-regulating chamber 5. A second flow channel 12 is provided on the side of the volume-regulating chamber 5 and extends into the liquid storage box 3. A negative pressure suction pipe 10 is provided in the volume-regulating chamber 5. The negative pressure suction pipe 10 is interconnected with the first flow channel 11, and the first flow channel 11 and the second flow channel 12 are interconnected. The first flow channel 11 has a step, and the first sealing element 81 is fixedly installed on the step. The second flow channel 12 is staggered from the first flow channel 11, with the bottom of the second flow channel 12 being higher than the bottom of the first flow channel 11. Several evenly distributed second sealing elements 13 are provided between the second flow channel 12 and the liquid storage box 3. The bottom of the first flow channel 11 has a discharge hole 14, which is connected to the negative pressure suction pipe 10. The liquid storage box 3 has a one-way valve assembly 7, which includes a valve core 71, a spring 72, and a rubber core 73. The bottom of the liquid storage box 3 has an installation channel 31, which contains the one-way valve assembly 7. The installation channel 31 is connected to the constant volume chamber 5, and the two are sealed together. A rubber core 73 is fixedly installed on the end of the valve core 71 facing the liquid storage box 3; a spring 72 is installed on the valve core 71; a second flow channel 12 extending into the installation channel 31 is provided in the constant volume chamber 5, and a second sealing element 13 is provided between the second flow channel 12 and the installation channel 31; one end of the spring 72 abuts against the protrusion of the valve core 71, and the other end of the spring 72 abuts against the inner wall of the second flow channel 12; the rubber core 73 is disposed in the liquid storage box 3, and the rubber core 73 is positioned facing the opening end of the second flow channel 12. A limiting step 32 is provided in the liquid storage box 3, and the limiting step 32 is positioned facing the opening end of the second flow channel 12; when the liquid storage box 3 is installed in the water storage tank 2, the rubber core 73 is positioned away from the opening end of the second flow channel 12. A vent 15 is provided at the top of the constant volume chamber 5, and the vent 15 communicates with the outside atmosphere.

[0030] The specific operation process of this embodiment is as follows: When the main water inlet valve 1 adds water to the water storage tank 2, the water flow will enter the middle flow channel 9 in the water storage tank 2 along the Venturi tube 6, and then enter the water circuit board assembly 4 along the middle flow channel 9, and finally flow into the washing machine drum; since a negative pressure suction pipe 10 is provided between the Venturi tube 6 and the constant volume chamber 5, the constant volume chamber 5 temporarily stores detergent; when the water flows through the Venturi tube 6, a negative pressure is generated inside the Venturi tube 6, then the detergent in the constant volume chamber 5 will enter the Venturi tube 6 along the negative pressure suction pipe 10, and then the detergent and water flow will enter the water circuit board assembly at the same time.

[0031] The bottom of the liquid storage box 3 is equipped with a one-way valve assembly 7. When the liquid storage box 3 is pulled out from the water tank 2, and new detergent is added to the liquid storage box 3, the spring 72 is in a compressed state when the liquid storage box 3 is pulled out. This causes the rubber core 73 at the end of the valve core 71 to block the bottom opening of the liquid storage box 3, thus preventing detergent from overflowing during the addition process. The water tank 2 and the liquid storage box 3 are fixed by the existing snap-fit ​​connection, which will not be discussed further here. When the liquid storage box 3 is installed in the water tank 2, the end of the valve core 71 is squeezed by the end of the second flow channel 12 on the constant volume chamber 5. This causes the valve core 71 and the rubber core 73 to move into the liquid storage box 3, thereby opening the one-way valve assembly 7. At this time, the liquid storage box 3 and the second flow channel 12 are in a mutually conductive state. The second flow channel 12 is positioned higher than the bottom of the first flow channel 11. Under the influence of gravity, the detergent in the storage box 3 will enter the volume-fixing chamber 5 along the second flow channel 12. Since the bottom of the first flow channel 11 is provided with a discharge hole 14, the detergent will continue to enter the volume-fixing chamber 5, and the liquid level in the volume-fixing chamber 5 will rise. Then the float body 82 will rise with the liquid level. When the float body 82 contacts the first seal 81, it will block the first flow channel 11 and the second flow channel 12, so the detergent in the storage box 3 cannot continue to enter the volume-fixing chamber 5. Then, when the main inlet valve 1 adds water to the water storage tank 2, a negative pressure is generated in the venturi tube 6, thereby drawing detergent into the water circuit board assembly 4. When the detergent in the constant volume chamber 5 decreases, the liquid level drops, causing the float body 82 to descend, and the first flow channel 11 and the second flow channel 12 to reconnect. The detergent can then flow back from the liquid storage box 3 into the constant volume chamber 5. By repeating the above steps, detergent can be continuously and quantitatively added to the water circuit board assembly 4. By setting the vent 15, the pressure in the constant volume chamber 5 is balanced, thereby ensuring that detergent can flow from the liquid storage box 3 into the constant volume chamber 5.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A constant-volume automatic dispensing device, comprising a main inlet valve (1) and a water storage tank (2), characterized in that, The water storage tank (2) is equipped with a detachable liquid storage box (3), and a water circuit board assembly (4) connected to the water storage tank (2) is provided above the liquid storage box (3); a constant volume chamber (5) is provided between the main water inlet valve (1) and the water storage tank (2), and a venturi tube (6) is provided at the top of the constant volume chamber (5), and the venturi tube (6) is connected to the main water inlet valve (1) and the water storage tank (2) respectively; a one-way valve assembly (7) is provided at the open end of the liquid storage box (3), and the constant volume chamber (5) and the liquid storage box (3) are connected to each other when the liquid storage box (3) is installed in the water storage tank (2); a float assembly (8) is provided in the constant volume chamber (5) for controlling the conduction state between the liquid storage box (3) and the constant volume chamber (5); the one-way valve assembly (7) is in the open state when the liquid storage box (3) is installed in the water storage tank (2).

2. The constant-volume automatic dispensing device according to claim 1, characterized in that, The water storage tank (2) is provided with an intermediate flow channel (9), which is located between the Venturi tube (6) and the water circuit board assembly (4). One end of the intermediate flow channel (9) is connected to the outlet end of the Venturi tube (6), and the other end of the intermediate flow channel (9) is connected to the inlet end of the water circuit board assembly (4).

3. The constant-volume automatic dispensing device according to claim 2, characterized in that, One end of the Venturi tube (6) is sealed and connected to the main inlet valve (1), and the other end of the Venturi tube (6) is sealed and connected to the intermediate flow channel (9); the Venturi tube (6) is provided with a negative pressure suction pipe (10) that is connected to the constant volume chamber (5); the negative pressure suction pipe (10) is arranged in a vertical direction and extends to the bottom of the constant volume chamber (5).

4. The constant-volume automatic dispensing device according to claim 1, characterized in that, The volume-regulating chamber (5) is provided with a first flow channel (11), and a float assembly (8) is installed in the first flow channel (11). The float assembly (8) includes a first seal (81) and a float body (82). The first seal (81) is fixedly installed in the first flow channel (11). The float body (82) is slidably installed in the first flow channel (11), and the float body (82) is located between the first seal (81) and the bottom of the volume-regulating chamber (5). The side of the volume-regulating chamber (5) is provided with a second flow channel (12), and the second flow channel (12) extends into the liquid storage box (3). The volume-regulating chamber (5) is provided with a negative pressure suction pipe (10), and the negative pressure suction pipe (10) is interconnected with the first flow channel (11). The first flow channel (11) and the second flow channel (12) are interconnected.

5. The constant-volume automatic dispensing device according to claim 4, characterized in that, The first flow channel (11) is provided with a step, and the first seal (81) is fixedly installed on the step; the second flow channel (12) and the first flow channel (11) are staggered in height, and the second flow channel (12) is set higher than the bottom of the first flow channel (11); a number of evenly distributed second seals (13) are provided between the second flow channel (12) and the liquid storage box (3).

6. The constant-volume automatic dispensing device according to claim 4, characterized in that, The bottom of the first flow channel (11) is provided with a discharge hole (14), which is connected to the negative pressure suction pipe (10).

7. The constant-volume automatic dispensing device according to claim 1, characterized in that, The liquid storage box (3) is provided with a one-way valve assembly (7), which includes a valve core (71), a spring (72) and a rubber core (73); the bottom of the liquid storage box (3) is provided with an installation channel (31), which is provided with the one-way valve assembly (7); the installation channel (31) is connected to the constant volume chamber (5) and the two are sealed together.

8. The constant-volume automatic dispensing device according to claim 7, characterized in that, A rubber core (73) is fixedly installed on the end of the valve core (71) facing the liquid storage box (3); a spring (72) is installed on the valve core (71); a second flow channel (12) is provided in the constant volume chamber (5) extending into the installation channel (31), and a second seal (13) is provided between the second flow channel (12) and the installation channel (31); one end of the spring (72) abuts against the protrusion of the valve core (71), and the other end of the spring (72) abuts against the inner wall of the second flow channel (12); the rubber core (73) is located in the liquid storage box (3), and the rubber core (73) is located facing the opening end of the second flow channel (12).

9. The constant-volume automatic dispensing device according to claim 8, characterized in that, The liquid storage box (3) is provided with a limiting step (32), which is set towards the opening end of the second flow channel (12); when the liquid storage box (3) is installed in the water storage tank (2), the rubber core (73) is set away from the opening end of the second flow channel (12).

10. The constant-volume automatic dispensing device according to claim 1, characterized in that, The top of the fixed-volume chamber (5) is provided with a vent (15), which is connected to the outside atmosphere.

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