Liquid dispensing device

Abstract

This utility model discloses a liquid dispensing device, including a housing, a raw liquid tank, and a liquid pump mechanism. The housing has a mixing channel connecting the liquid inlet and the liquid outlet. The raw liquid tank has a storage chamber for storing foaming agent raw liquid. A liquid pump mechanism is movably arranged between the mixing channel and the storage chamber. The end face area of ​​the liquid pump mechanism facing the mixing channel is larger than the end face area of ​​the other end, so as to pump the foaming agent raw liquid from the storage chamber to the mixing channel while water flows through the mixing channel. The structure is simple and the foaming speed is fast.

Description

Technical Field

[0001] This utility model relates to the technical field of bathroom products, and in particular to the technical field of toilet foam shields. Background Technology

[0002] Toilets typically contain a curved pipe (usually U-shaped or S-shaped) that retains a certain amount of water during flushing to form a water seal barrier and isolate odors from the sewer. However, this water seal barrier can also be splashed by excrement during use, causing inconvenience. By covering the water seal surface with foam to form a foam shield, not only can sewage splashing be effectively suppressed, but the toilet bowl can also be sterilized, deodorized, and lubricated.

[0003] In traditional designs, a liquid pump, an air pump, and a reversing valve / solenoid valve are typically used together. Water is supplied through the reversing valve / solenoid valve, the liquid pump draws foaming agent concentrate from the storage bottle, and the air pump provides gas to mix the water, foaming agent concentrate, and gas. However, liquid pumps and air pumps not only occupy more space but also increase manufacturing costs.

[0004] Based on this, a foam shield device with announcement number CN220789993U selects to use the pressure difference generated by water flowing through the compression chamber to extract the foaming agent concentrate; however, although the compression chamber can increase the pressure inside the chamber and push the diaphragm by reducing the chamber diameter, it will also reduce the flow rate inside the chamber, resulting in a very slow foaming speed (the foam may drip for more than ten seconds and still not be able to completely cover the water seal barrier); in addition, the existence of the compression chamber also causes the pressure and flow rate between the water outlet of the brush ring and the foam outlet of the foam shield to be inconsistent, so that the water outlet channel of the brush ring (i.e., its brush ring channel) and the foam outlet channel (i.e., its foam outlet channel) must be divided into two independent channels, which further increases the structural complexity and footprint of the device. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a liquid dispensing device that has a simple structure and a fast foaming speed.

[0006] To achieve the above objectives, this utility model proposes a liquid dispensing device, including a housing, a stock solution tank, and a liquid pump mechanism. The housing has a mixing channel connecting an inlet and an outlet. The stock solution tank has a storage chamber for storing foaming agent stock solution. A liquid pump mechanism is movably arranged between the mixing channel and the storage chamber. The end face area of ​​the liquid pump mechanism facing the mixing channel is larger than the end face area of ​​the other end to pump the foaming agent stock solution from the storage chamber to the mixing channel while water flows through the mixing channel.

[0007] Preferably, a temporary storage cavity for storing the foaming agent stock solution is provided between the liquid storage cavity and the mixing channel, and an outlet passage is also connected between the temporary storage cavity and the mixing channel.

[0008] Preferably, the pump mechanism includes a stopcock and an elastic reset member. The end of the stopcock with a smaller end face area is positioned towards and seals the temporary storage cavity, while the end of the stopcock with a larger end face area is positioned towards and seals the mixing channel. The stopcock can slide towards the temporary storage cavity under the thrust of water pressure when water flows through the mixing channel, and the stopcock can also return to its original position under the elastic force of the elastic reset member when no water flows through the mixing channel.

[0009] Preferably, the plug rod seals the mixing channel and the temporary storage cavity through a first sealing element and a second sealing element, respectively, wherein both the first sealing element and the second sealing element can be an annular sealing ring or a diaphragm.

[0010] Preferably, the elastic reset element is a spring sleeved outside the stopcock.

[0011] Preferably, the temporary storage cavity is equipped with a one-way inlet valve that allows only the foaming agent concentrate to flow from the storage cavity into the temporary storage cavity, and the outlet passage is equipped with a one-way outlet valve that allows only the foaming agent concentrate to flow from the temporary storage cavity into the mixing channel.

[0012] Preferably, the connection between the liquid outlet passage and the mixing passage is located in front of or behind the water inlet.

[0013] Preferably, the mixing channel is also connected to an air-injection mechanism to mix in air.

[0014] Preferably, the air-injection mechanism is a Venturi suction head that automatically injects air into the mixing channel by using the negative pressure generated by the liquid flow.

[0015] Preferably, the Venturi suction head connects the inlet end and the outlet end to the mixing channel and the outlet end respectively, and a narrowing section is provided between the inlet end and the outlet end. The narrowing section is also provided with an air inlet for connecting to the outside.

[0016] The beneficial effects of this utility model are:

[0017] 1) High-efficiency foaming: This utility model adopts a liquid pump mechanism with different areas at both ends. It can utilize the principle of "the larger the pressure surface, the greater the pressure" under the action of fluid pressure to directly drive the liquid pump mechanism to pump the foaming agent concentrate through water flow. This design avoids the limitation of flow rate by the compression chamber, which significantly improves the foaming speed of the foaming agent concentrate and water, thereby quickly forming a complete foam shield in a short time and effectively suppressing the problem of water splashing.

[0018] 2) Simplified structure: By ensuring that the front and rear pipe diameters of the mixing channel are consistent (removing the compression chamber), the water flow pressure can be stabilized and uniform, so that the water outlet of the brush ring and the foam outlet of the foam shield can share the same channel (i.e., single-channel integrated design), reducing unnecessary pipe components (no need for additional small pipes for foam drainage). While reducing the structural complexity of the device, it also saves installation space, making it more suitable for the integration needs of compact bathroom equipment.

[0019] 3) Precise liquid control: This utility model adds a temporary storage chamber and is equipped with a one-way inlet valve (allowing only the foaming agent concentrate to flow from the storage chamber into the temporary storage chamber) and a one-way outlet valve (allowing only the foaming agent concentrate to flow from the temporary storage chamber into the mixing channel), thereby precisely controlling the amount of concentrate pumped each time and avoiding the instability of foam concentration caused by fluctuations in the amount of concentrate.

[0020] 4) Flexible Adaptability: This utility model provides two implementation methods for mixing foaming agent concentrate into the water flow to improve the adaptability of the device to different toilets and usage needs; when the foaming agent concentrate is mixed in after the water inlet, the water flow passes through the pump mechanism drive area before mixing with the concentrate, making it more suitable for scenarios that require a stable water flow to drive the pump mechanism; when the foaming agent concentrate is mixed in before the water inlet, the foaming reaction speed can be accelerated because the foaming agent concentrate comes into contact with the water flow in advance, making it more suitable for scenarios with higher requirements for foaming time.

[0021] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1;

[0023] Figure 2 This is the front view of Embodiment 1;

[0024] Figure 3 This is a top view of Embodiment 1;

[0025] Figure 4 yes Figure 3 Sectional view along axis AA;

[0026] Figure 5 yes Figure 4 An enlarged view of point B;

[0027] Figure 6 This is a front sectional view of Embodiment 2;

[0028] In the diagram: 1-machine housing, 11-liquid inlet, 12-liquid outlet, 13-mixing channel, 14-temporary storage chamber, 15-auxiliary passage, 16-liquid outlet passage, 2-raw material tank, 21-storage chamber, 3-one-way inlet valve, 4-one-way outlet valve, 5-liquid pump mechanism, 51-plug rod, 52-diaphragm, 53-elastic reset element, 54-sealing ring, 6-gas filling mechanism. Detailed Implementation

[0029] Example 1:

[0030] See Figures 1 to 5 This embodiment includes a housing 1, a raw liquid tank 2, and a pump mechanism 5. The housing 1 has a mixing channel 13 that connects the inlet 11 and the outlet 12. The raw liquid tank 2 has a storage chamber 21 for storing foaming agent raw liquid. The pump mechanism 5 is movably arranged between the mixing channel 13 and the storage chamber 21. The end face area of ​​the pump mechanism 5 facing the mixing channel 13 is larger than the end face area of ​​the other end so as to pump the foaming agent raw liquid from the storage chamber 21 to the mixing channel 13 while water flows through the mixing channel 13.

[0031] A temporary storage cavity 14 is provided between the liquid storage cavity 21 and the mixing channel 13 to temporarily store the foaming agent stock solution. A liquid outlet passage 16 is also connected between the temporary storage cavity 14 and the mixing channel 13.

[0032] The liquid pump mechanism 5 includes a stopper rod 51 and an elastic reset member 53. The end of the stopper rod 51 with a smaller end face area is positioned towards the temporary storage cavity 14 and seals the temporary storage cavity 14. The end of the stopper rod 51 with a larger end face area is positioned towards the mixing channel 13 and seals the mixing channel 13. The stopper rod 51 can slide towards the temporary storage cavity 14 under the thrust of water pressure when water flows through the mixing channel 13. The stopper rod 51 can also return to its original position under the elastic force of the elastic reset member 53 when no water flows through the mixing channel 13.

[0033] The plug rod 51 seals the mixing channel 13 and the temporary storage cavity 14 through the first sealing element 52 and the second sealing element 54 respectively. Both the first sealing element 52 and the second sealing element 54 can be annular sealing rings or diaphragms. In this embodiment, the first sealing element 52 is a diaphragm and the second sealing element 54 is an annular sealing ring, thereby ensuring that the liquid pump mechanism 5 is leak-free during long-term use.

[0034] The elastic reset element 53 is a spring sleeved outside the stopper rod 51.

[0035] The temporary storage cavity 14 is equipped with a one-way inlet valve 3 that allows only the foaming agent concentrate to flow from the storage cavity 21 into the temporary storage cavity 14, and the outlet passage 16 is equipped with a one-way outlet valve 4 that allows only the foaming agent concentrate to flow from the temporary storage cavity 14 into the mixing channel 13.

[0036] The connection between the liquid outlet passage 16 and the mixing passage 13 is located behind the water inlet.

[0037] The mixing channel 13 is also connected to an air-injection mechanism 6 to mix in air.

[0038] The gas injection mechanism 6 is a Venturi suction head that automatically injects air into the mixing channel 13 by using the negative pressure generated by the liquid flow.

[0039] The Venturi suction head connects the inlet end and the outlet end to the mixing channel 13 and the outlet 12, respectively. A narrowing section is provided between the inlet end and the outlet end, and the narrowing section is also provided with an air inlet for connecting to the outside. During operation, the Venturi suction head can automatically draw in air using the Venturi effect without the need for an additional air pump.

[0040] In addition, an auxiliary passage 15 connected in parallel with the mixing channel 13 can be added between the liquid inlet 11 and the liquid outlet 12, so that water can switch between the mixing channel 13 and the auxiliary passage 15 by means of a switch arranged at the liquid inlet 11.

[0041] The working process of this embodiment:

[0042] When a foam shield needs to be generated, the switcher first switches to the mixing channel 13, so that water flows from the inlet 11 to the outlet 12 along the mixing channel 13. During this period, since the area of ​​the end of the stopper 51 near the temporary storage cavity 14 is smaller than the area of ​​the diaphragm installed at the other end, the pump mechanism 5 moves toward the temporary storage cavity 14 to squeeze the foaming agent concentrate from the temporary storage cavity 14 to the mixing channel 13 along the outlet passage 16. When the mixture of water and foaming agent concentrate flows through the Venturi suction head, air will also be mixed in under negative pressure, thereby forming bubbles and being discharged along the outlet 12. After that, the pump mechanism 5 will return to its original position under the elastic force of the elastic reset member 53, and the foaming agent concentrate will also be replenished from the storage cavity 21 to the temporary storage cavity 14 at the same time.

[0043] Example 2:

[0044] See Figure 6 The connection between the liquid outlet passage 16 and the mixing passage 13 is located in front of the water inlet.

[0045] Everything else is the same as in Example 1.

[0046] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. Liquid dispensing device, characterized in that: The device includes a housing (1), a raw liquid tank (2), and a pump mechanism (5). The housing (1) has a mixing channel (13) that connects the inlet (11) and the outlet (12). The raw liquid tank (2) has a storage chamber (21) for storing the foaming agent raw liquid. The pump mechanism (5) is movably arranged between the mixing channel (13) and the storage chamber (21). The end face area of ​​the pump mechanism (5) facing the mixing channel (13) is larger than the end face area of ​​the other end so as to pump the foaming agent raw liquid from the storage chamber (21) to the mixing channel (13) during the flow of water through the mixing channel (13).

2. The liquid dispensing device of claim 1, wherein: A temporary storage chamber (14) for temporarily storing foaming agent stock solution is provided between the liquid storage chamber (21) and the mixing channel (13), and an outlet passage (16) is also connected between the temporary storage chamber (14) and the mixing channel (13).

3. The liquid dispensing device of claim 2, wherein: The liquid pump mechanism (5) includes a stopper rod (51) and an elastic reset member (53). The end of the stopper rod (51) with a smaller end face area is positioned towards the temporary storage cavity (14) and seals the temporary storage cavity (14). The end of the stopper rod (51) with a larger end face area is positioned towards the mixing channel (13) and seals the mixing channel (13). The stopper rod (51) can slide towards the temporary storage cavity (14) under the thrust of water pressure when water flows through the mixing channel (13). The stopper rod (51) can also return to its original position under the elastic drive of the elastic reset member (53) when no water flows through the mixing channel (13).

4. The liquid dispensing device of claim 3, wherein: The plug rod (51) seals the mixing channel (13) and the temporary storage cavity (14) through the first sealing element (52) and the second sealing element (54), respectively. The first sealing element (52) and the second sealing element (54) can both be annular sealing rings or diaphragms.

5. The liquid dispensing device as described in claim 3, characterized in that: The elastic reset element (53) is a spring sleeved outside the plug rod (51).

6. The liquid dispensing apparatus of claim 2, wherein: The temporary storage chamber (14) is equipped with a one-way inlet valve (3) that allows only the foaming agent concentrate to flow from the storage chamber (21) into the temporary storage chamber (14), and the outlet passage (16) is equipped with a one-way outlet valve (4) that allows only the foaming agent concentrate to flow from the temporary storage chamber (14) into the mixing passage (13).

7. The liquid dispensing apparatus of claim 2, wherein: The connection between the liquid outlet passage (16) and the mixing passage (13) is located in front of or behind the water inlet.

8. The liquid dispensing device according to any one of claims 1 to 7, wherein: The mixing channel (13) is also connected to an air-injection mechanism (6) to mix in air.

9. The liquid dispensing device of claim 8, wherein: The gas injection mechanism (6) is a Venturi suction head that automatically injects air into the mixing channel (13) by using the negative pressure generated by the liquid flow.

10. The liquid dispensing device of claim 9, wherein: The Venturi suction head connects the inlet end and the outlet end to the mixing channel (13) and the outlet (12) respectively. A narrowing section is provided between the inlet end and the outlet end, and the narrowing section is also provided with an air inlet that connects to the outside.

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