Droplet-proof detergent dispenser

Abstract

The utility model discloses a drop prevention type detergent dispenser, including through the needle pass and push the needle and realize the plug -in cooperation's liquid storage box and throw the box, the liquid storage box with throw the box between through the first sealing ring of fixed in the needle pass inner wall place and carry out the sealing, can solve the drop problem of current detergent dispenser from the source.

Description

Technical Field

[0001] This utility model relates to the technical field of washing machines, and in particular to the technical field of detergent dispensers. Background Technology

[0002] With the increasing intelligence of fully automatic washing machines, intelligent detergent dispensing devices have become one of the mainstream configurations for fully automatic washing machines in order to simplify user operation and achieve accurate detergent dispensing. This device usually includes a dispensing box fixed inside the washing machine and a liquid storage box that can be plugged into the dispensing box, such as the detergent dispenser with announcement number CN201778213U and an intelligent detergent dispensing box with announcement number CN116427136B. The liquid storage box can be pulled out by the user to pre-fill the detergent (i.e., pre-store the detergent), and the dispensing box can transfer the detergent from the liquid storage box to the washing tub in a metered manner during the washing cycle through the action of the pump or water rinsing (completing the automatic dispensing of detergent).

[0003] In existing technologies, the insertion and sealing of the dispensing box and the storage box generally adopts a "push needle-needle channel" structure design. Specifically, the storage box has a needle channel for fluid flow, and the dispensing box has a push needle (needle tip located at the end face) that is adapted to the needle channel. During insertion, the push needle is inserted into the needle channel to achieve assembly and fluid passage. At the same time, in order to prevent detergent leakage at the insertion point, a sealing ring is often fitted around the push needle.

[0004] However, the existing design described above has a significant "dripping" problem in actual use, adding an extra cleaning burden for users; the specific defects are mainly reflected in two aspects: "dripping caused by the syringe effect" and "dripping exacerbated by the structure of the syringe outlet": see [reference] Figures 1 to 3 For the former, since the sealing ring is fitted around the moving push pin, when the user needs to pull out the reservoir (e.g., to refill detergent), the sealing ring will move synchronously with the push pin (e.g., ...). Figure 3 As shown at position a, the sealing ring achieves a seal using the "moving side" (or "outer ring side"), resulting in a spatial change between the dispensing box and the storage box similar to "syringe pulling," causing the detergent to drip out under suction. For the latter, since the nozzle of the push needle is located at the end face (as shown in the image),... Figure 3 As shown at position b), the detergent is prone to dripping due to gravity (further exacerbating the dripping problem).

[0005] In summary, the detergent dispenser of existing fully automatic washing machines, due to its design of "moving side sealing ring + end face liquid outlet", is prone to dripping when the liquid storage box is pulled out, resulting in poor usability and the need for additional cleaning. There is an urgent need for an improved solution to solve the dripping problem and enhance the user experience of intelligent detergent dispensing devices. Summary of the Invention

[0006] This invention proposes an anti-drip detergent dispenser, which can fundamentally solve the dripping problem of existing detergent dispensers.

[0007] To achieve the above objectives, this utility model proposes a drip-proof detergent dispenser, comprising a liquid storage box and a dispensing box that are connected by a needle channel and a push needle, wherein the liquid storage box and the dispensing box are sealed by a first sealing ring fixed to the inner wall of the needle channel.

[0008] Preferably, the nozzle of the pusher needle is positioned facing upwards.

[0009] Preferably, the pusher is also equipped with a one-way valve that allows detergent to flow from the reservoir into the dispensing box.

[0010] Preferably, the liquid storage box includes a box shell that can connect the outside world to the box cavity through an insertion channel, a guide sleeve disposed in the insertion channel, and a push rod mechanism that can elastically seal the guide sleeve. The dispensing box includes a base that can connect the outside world to the washing chamber through a dispensing channel and a push pin that extends outward from the dispensing channel. The push pin can be inserted into the guide sleeve and push open the push rod mechanism.

[0011] Preferably, the guide sleeve has a first sleeve body, a middle sleeve body, and a tail sleeve body arranged sequentially from the inside to the outside, and the sleeve body channel formed by the through-hole serves as a needle channel. The push rod mechanism can slide between the first sleeve body and the middle sleeve body to block or open the sleeve body channel. The middle sleeve body and the tail sleeve body surround each other to form an annular groove that can accommodate the first sealing ring.

[0012] Preferably, the annular groove is further provided with a spacer ring that can separate adjacent first sealing rings from each other.

[0013] Preferably, the first sealing ring is a Y-shaped seal.

[0014] Preferably, the first, middle, and last shells are sealed together by a second, third, and fourth sealing ring.

[0015] Preferably, the push rod mechanism consists of a push rod and a spring. One end of the push rod is inserted into the first sleeve body along the blind hole, while the other end is set toward the valve seat of the middle sleeve body. The spring is sleeved outside the push rod and its two ends support the first sleeve body and the middle sleeve body respectively.

[0016] Preferably, the push rod and the middle sleeve are sealed by a fifth sealing ring.

[0017] The beneficial effects of this utility model are: 1) Static side sealing design eliminates syringe effect dripping: This invention abandons the conventional design of "moving side (outer periphery of the push needle) sealing" in the prior art, and fixes the first sealing ring in the annular groove on the inner wall of the needle channel of the reservoir, realizing "static side (inner ring side) sealing". In the prior art, the sealing ring moves synchronously with the push needle, resulting in a spatial change similar to "syringe pulling" during the pull-out process and generating local pressure fluctuations, which in turn adsorb and drip residual detergent. This invention chooses to fix the first sealing ring on the guide sleeve of the reservoir, so that the push needle slides relative to the sealing ring during the pull-out process, completely eliminating the basis for the syringe effect. In addition, the annular groove on the guide sleeve provides a stable installation position for the first sealing ring, and the spacer rings separate adjacent first sealing rings to prevent the first sealing rings from shifting or being squeezed and deformed during use (ensuring that the sealing surface is always tightly fitted, ensuring the sealing reliability in the plugged state), and finally eliminating the dripping problem caused by the syringe effect from the root, without the need for additional cleaning by the user, which can greatly improve the convenience of use. 2) The nozzle is positioned upwards to reduce the risk of residual dripping: Addressing the shortcomings of existing push-pin nozzles where detergent residue easily remains at the "end face outlet" and drips due to gravity, this invention changes the nozzle to face upwards, thereby reducing the possibility of dripping from both the residual form and the influence of gravity. Specifically, on the one hand, during detergent dispensing, the upward-facing nozzle prevents detergent from adhering to the nozzle tip; on the other hand, even if a small amount of detergent residue remains, because the nozzle is upward-facing, the residual droplets will naturally flow back into the dispensing channel under gravity, rather than dripping directly into the washing machine's interior or exterior (this complements the static side sealing design, jointly improving the anti-drip effect). 3) Built-in one-way valve structure to prevent detergent backflow and leakage: In this invention, the one-way valve installed inside the push needle also limits the one-way flow direction of the detergent (only allowing detergent to flow from the reservoir box into the dispensing box through the push needle, and blocking reverse flow); that is, during the execution of the washing program, the one-way valve can ensure that the detergent is accurately dispensed along the preset path, avoiding inaccurate dispensing caused by backflow; in addition, when it is necessary to pull out the reservoir box to replenish detergent (there may be some detergent remaining in the dispensing channel that has not completely flowed into the washing chamber), the one-way valve can also use its automatic closing function to effectively prevent this part of the detergent from flowing back to the nozzle of the push needle, thereby cutting off the possibility of backflow and leakage in the flow path; the addition of the one-way valve is equivalent to building a "third line of defense" in the anti-drip system, forming a synergistic effect with the static side sealing and the upward-facing nozzle design (even if there are trace amounts of residue in the first two structures, the one-way valve can prevent dripping by blocking backflow, ensuring reliable anti-drip performance in any usage scenario); 4) Multiple sealing designs enhance overall leak-proof performance: In addition to the core anti-drip structure, this invention further improves overall leak-proof reliability through multiple sealing designs. On the one hand, the second, third, and fourth sealing rings are respectively set between the first, middle, and tail sleeves of the housing and the guide sleeve, thus sealing the potential leakage gaps at the connection surfaces of each component and preventing detergent from leaking from the component assembly points. On the other hand, the fifth sealing ring set between the push rod and the middle sleeve can cooperate with the elastic sealing function of the push rod mechanism, thereby effectively sealing the valve seat when the liquid storage box and the dispensing box are separated, preventing detergent in the box cavity from leaking from the sleeve channel. This multi-sealing structure works together to provide layer-by-layer protection, not only completely solving the dripping problem, but also comprehensively improving the overall sealing reliability of the dispenser, preventing detergent from leaking into the washing machine and causing component corrosion or contamination, extending the service life of the device, and ensuring cleanliness and hygiene during use.

[0018] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of an existing detergent dispenser in the top-open state; Figure 2 This is a schematic diagram of the internal structure of an existing detergent dispenser in a sealed state. Figure 3 yes Figure 2 An enlarged view of point A; Figure 4 This is a schematic diagram of the internal structure of the anti-drip detergent dispenser of this utility model in the top-open state; Figure 5 yes Figure 4 An enlarged view of point B; Figure 6 This is a schematic diagram of the internal structure of the anti-drip detergent dispenser of this utility model in a sealed state; Figure 7 yes Figure 6 An enlarged schematic diagram of point C.

[0020] In the diagram: 1-Liquid storage box, 11-Box shell, 111-Box cavity, 12-Push rod mechanism, 13-Guide sleeve, 131-First sleeve body, 1311-Blind hole, 132-Second sleeve body, 1321-Valve seat, 133-Tail sleeve body, 134-Spacer ring, 2-Dispensing box, 21-Base body, 22-Push needle, 221-Needle nozzle, 3-First sealing ring, 4-Second sealing ring, 5-Third sealing ring, 6-Fourth sealing ring, 7-Fifth sealing ring, 8-One-way valve. Detailed Implementation

[0021] See Figures 4 to 7 (Springs are omitted in all figures) The present invention is a drip-proof detergent dispenser, which includes a liquid storage box 1 and a dispensing box 2 that are connected by a needle channel and a push needle 22. The liquid storage box 1 and the dispensing box 2 are sealed by a first sealing ring 3 fixed to the inner wall of the needle channel.

[0022] The nozzle 221 of the push needle 22 is positioned upwards.

[0023] The pusher 22 is also equipped with a one-way valve 8 that allows detergent to flow from the storage box 1 into the dispensing box 2.

[0024] The liquid storage box 1 includes a box shell 11 that can be connected to the outside world and the box cavity 111 through an insertion channel, a guide sleeve 13 disposed in the insertion channel, and a push rod mechanism 12 that can elastically seal the guide sleeve 13. The dispensing box 2 includes a base 21 that can be connected to the outside world and the washing chamber through a dispensing channel, and a push needle 22 that extends outward from the dispensing channel. The push needle 22 can be inserted into the guide sleeve 13 and push open the push rod mechanism 12.

[0025] The guide sleeve 13 has a first sleeve body 131, a middle sleeve body 132 and a tail sleeve body 133 arranged sequentially from the inside to the outside, and the sleeve channel formed by the through is used as a needle channel. The push rod mechanism 12 can slide between the first sleeve body 131 and the middle sleeve body 132 to block or open the sleeve channel. The middle sleeve body 132 and the tail sleeve body 133 surround each other to form an annular groove that can accommodate the first sealing ring 3.

[0026] The annular groove is also provided with a spacer 134 that can separate adjacent first sealing rings 3 from each other.

[0027] The first sealing ring 3 is a Y-shaped seal (with the Y-shaped head facing inward); this special sealing structure can further enhance the sealing fit under fluid pressure, and the sealing effect is better than that of conventional sealing rings, further reducing the risk of leakage.

[0028] The casing 11 is sealed between the first sleeve 131, the middle sleeve 132 and the tail sleeve 133 by the second sealing ring 4, the third sealing ring 5 and the fourth sealing ring 6.

[0029] The push rod mechanism 12 is composed of a push rod and a spring. One end of the push rod is inserted into the first sleeve 131 along the blind hole 1311, while the other end is set towards the valve seat 1321 of the middle sleeve 132. The spring is sleeved outside the push rod and its two ends support the first sleeve 131 and the middle sleeve 132 respectively.

[0030] The push rod and the middle sleeve 132 are sealed by the fifth sealing ring 7.

[0031] The working process of this utility model: During normal operation, the liquid storage box 1 and the dispensing box 2 remain plugged together; such as Figure 4 and Figure 5 As shown, at this time, since the push rod is further pushed into the blind hole 1311 by the push needle 2 (the push rod is away from the valve seat 1321 and the spring is compressed synchronously), the sleeve channel is in an open state. The detergent can first enter the dispensing channel from the box cavity through the needle nozzle 221 along the sleeve channel, and then flow into the washing chamber along the dispensing channel.

[0032] When detergent needs to be replenished, the storage container 1 can be pulled out from the dispensing container 2; such as Figure 6 and Figure 7 As shown, at this time, the spring can use its elastic force to drive the push rod to press against the valve seat 1321 to block the sleeve channel, and the one-way valve 8 and the upward-facing needle nozzle 221 can prevent the detergent inside from flowing out again; in addition, since the first seal 3 achieves sealing through the "stationary side" (or "inner ring side"), the pulling process will not produce a syringe effect and cause dripping.

[0033] 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. A drip-proof detergent dispenser, characterized in that: It includes a liquid storage box (1) and a dispensing box (2) that are connected by a needle channel and a push needle (22), and the liquid storage box (1) and the dispensing box (2) are sealed by a first sealing ring (3) fixed to the inner wall of the needle channel.

2. The anti-drip detergent dispenser as described in claim 1, characterized in that: The needle tip (221) of the push needle (22) is set upward.

3. The anti-drip detergent dispenser as described in claim 1, characterized in that: The pusher (22) is also equipped with a one-way valve (8) that allows detergent to flow from the storage box (1) into the dispensing box (2).

4. The anti-drip detergent dispenser as described in any one of claims 1 to 3, characterized in that: The liquid storage box (1) includes a box shell (11) that can be connected to the outside world and the box cavity (111) through a plug-in channel, a guide sleeve (13) disposed in the plug-in channel, and a push rod mechanism (12) that can elastically seal the guide sleeve (13). The dispensing box (2) includes a base (21) that can be connected to the outside world and the washing chamber through a dispensing channel, and a push needle (22) that extends outward from the dispensing channel. The push needle (22) can be inserted into the guide sleeve (13) and push open the push rod mechanism (12).

5. The anti-drip detergent dispenser as described in claim 4, characterized in that: The guide sleeve (13) has a first sleeve body (131), a middle sleeve body (132) and a tail sleeve body (133) arranged sequentially from the inside to the outside, and the sleeve body channel formed by the through is used as a needle channel. The push rod mechanism (12) can slide between the first sleeve body (131) and the middle sleeve body (132) to block or open the sleeve body channel. The middle sleeve body (132) and the tail sleeve body (133) surround each other to form an annular groove that can accommodate the first sealing ring (3).

6. The anti-drip detergent dispenser as described in claim 5, characterized in that: The annular groove is also provided with a spacer (134) that can separate adjacent first sealing rings (3) from each other.

7. The anti-drip detergent dispenser as described in claim 5, characterized in that: The first sealing ring (3) is a Y-shaped seal.

8. The anti-drip detergent dispenser as described in claim 5, characterized in that: The box shell (11) is sealed between the first sleeve (131), the middle sleeve (132) and the tail sleeve (133) through the second sealing ring (4), the third sealing ring (5) and the fourth sealing ring (6).

9. The anti-drip detergent dispenser as described in claim 5, characterized in that: The push rod mechanism (12) is composed of a push rod and a spring. One end of the push rod is inserted into the first sleeve (131) along the blind hole (1311), while the other end is set towards the valve seat (1321) of the middle sleeve (132). The spring is sleeved outside the push rod and supports the first sleeve (131) and the middle sleeve (132) at both ends respectively.

10. The anti-drip detergent dispenser as described in claim 9, characterized in that: The push rod and the middle sleeve (132) are sealed by the fifth sealing ring (7).

Images