Water flosser liquid delivery system

Abstract

The application provides a water faucet liquid outlet system, comprising: a liquid pump device, the liquid pump device comprising a liquid pump cavity and a liquid pump working element slidingly arranged in the liquid pump cavity, the liquid pump working element defining a throttling cavity and a pump head cavity of the liquid pump cavity which are mutually switchable; a liquid inlet flow channel, the liquid inlet flow channel being communicated with the pump head cavity through a liquid inlet one-way valve; a liquid outlet flow channel, the liquid outlet flow channel being communicated with the pump head cavity through a liquid outlet one-way valve; a throttling flow channel, the throttling flow channel being communicated with the throttling cavity; the liquid discharge stroke of the liquid pump working element comprising a first liquid discharge stage and a second liquid discharge stage connected after the first liquid discharge stage, the pump head cavity and the throttling cavity being in a cut-off state in the first liquid discharge stage, the pump head cavity and the throttling cavity being in a communication state in the second liquid discharge stage so that part of the liquid in the pump head cavity flows back to the throttling flow channel through the throttling cavity. The application can more effectively utilize oral cleaning liquid, improve the single endurance time of the water faucet, and bring a new washing experience.

Description

Technical Field

[0001] This invention relates to the field of oral hygiene technology, and in particular to a water flosser dispensing system. Background Technology

[0002] As living standards improve, people are becoming more aware of oral care, and the market offers a wider variety of oral cleaning tools. Among them, water flossers, as an alternative to traditional dental floss, have become an essential household appliance. Their basic working principle involves using a pump to draw water from a tank and then spraying it through a nozzle at a rate of hundreds or even thousands of high-pressure pulses per minute to clean food debris and plaque from between teeth, as well as massage the gums, thus improving the oral environment.

[0003] Existing water flossers cannot achieve water-saving functions; the only way to increase the water tank's lifespan is to increase its volume. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a water flosser liquid dispensing system that can more effectively utilize oral cleaning fluid, increase the single-use duration of the water flosser, create different pulse jet patterns, and bring a new rinsing experience.

[0005] To solve the above-mentioned technical problems, the present invention provides a water flosser dispensing system, comprising:

[0006] A liquid pump device, comprising a liquid pump chamber and a liquid pump working element slidably disposed within the liquid pump chamber, wherein the liquid pump working element defines a throttling chamber and a pump head chamber that are mutually connectable and disconnectable within the pump chamber of the liquid pump chamber.

[0007] The liquid inlet channel is connected to the pump head cavity via a liquid inlet check valve.

[0008] The liquid outlet channel is connected to the pump head chamber via a liquid outlet check valve.

[0009] Throttling channel, the throttling channel is connected to the throttling cavity;

[0010] The discharge stroke of the pump's working element includes a first discharge stage and a second discharge stage following the first discharge stage. During the first discharge stage, the pump head chamber and the throttling chamber are isolated. During the second discharge stage, the pump head chamber and the throttling chamber are connected so that some of the liquid in the pump head chamber flows back to the throttling channel through the throttling chamber.

[0011] Preferably, both the pump chamber and the pump working element of the liquid pump body have a variable diameter structure so as to switch the isolation state between the pump head chamber and the throttling chamber to the connected state during the liquid discharge stroke of the pump working element.

[0012] Preferably, the pump chamber includes a sliding fit chamber and a widened chamber, the diameter of which is larger than the diameter of the sliding fit chamber; the pump working element includes a plunger body, the plunger body is slidably disposed in the sliding fit chamber with a gap seal, and the outer peripheral wall of the plunger body is provided with a groove with an opening facing the throttling channel, the groove and the pump chamber together defining the throttling chamber.

[0013] Preferably, the groove is arranged around the plunger body to divide the plunger body into an upper plunger section, a waist-narrowing section and a lower plunger section connected axially in sequence. During the first liquid discharge stage, the upper plunger section is in a clearance-sealed fit with the sliding fit cavity, and during the second liquid discharge stage, the upper plunger section extends into the widened cavity; the lower plunger section is always in a clearance-sealed fit with the sliding fit cavity.

[0014] Preferably, the oral irrigator liquid dispensing system further includes a liquid-tight system, which includes a first sealing structure and a second sealing structure. The first sealing structure is disposed in one of the upper section of the plunger and the liquid pump cavity and can slide liquid-tightly between the other of the upper section of the plunger and the liquid pump cavity; the second sealing structure is disposed in one of the lower section of the plunger and the liquid pump cavity and can slide liquid-tightly between the other of the lower section of the plunger and the liquid pump cavity.

[0015] Preferably, the first sealing structure includes a wear-resistant sealing ring and an elastic sealing ring. The wear-resistant sealing ring is embedded in the annular mounting groove of the pump cavity and slides in a liquid-tight manner with the upper section of the plunger. The elastic sealing ring is embedded in the annular mounting groove and abuts against the radial inner side of the wear-resistant sealing ring.

[0016] Preferably, the elastic sealing ring is in a compressed state to compensate for wear gaps after the wear-resistant sealing ring wears down.

[0017] Preferably, the second sealing structure is an annular structure with a V-shaped cross-section, and the groove opening of the second sealing structure faces the throttling cavity.

[0018] Preferably, the transition point between the first drainage stage and the second drainage stage occurs after the peak flow rate of the liquid pump device.

[0019] Preferably, the liquid inlet channel includes a vertical extension and a lateral extension that is vertically connected to the vertical extension; one end of the throttling channel is connected to the vertical extension and the other end is connected to the throttling chamber; the liquid inlet check valve is disposed in the lateral extension.

[0020] As described above, the oral irrigator liquid dispensing system of the present invention has the following beneficial effects: When the pump working element performs the first dispensing stage of the dispensing stroke, the pump head chamber and the throttling chamber are isolated, and the liquid in the pump head chamber can only be squeezed into the dispensing channel by the pump working element. When the pump working element performs the second dispensing stage of the dispensing stroke, the pump head chamber and the throttling chamber are connected, and a portion of the liquid in the pump head chamber is squeezed into the dispensing channel by the pump working element, while another portion of the liquid in the pump head chamber flows back to the throttling channel through the throttling chamber, thereby achieving a throttling function. Therefore, the oral irrigator liquid dispensing system of this application can recover a portion of the liquid in the later stage of the dispensing stroke and re-inhale the recovered liquid into the pump head chamber, thereby making more efficient use of oral cleaning fluid, increasing the single-use time of the oral irrigator, and, in addition, due to the recovery of a portion of the oral cleaning fluid, the pulse jet pattern is different, bringing a new rinsing experience. Attached Figure Description

[0021] Figure 1 The image shown is a perspective view of the oral irrigator liquid dispensing system of the present invention.

[0022] Figure 2 The image shown is a side view of the oral irrigator liquid dispensing system of the present invention.

[0023] Figure 3 Displayed as along Figure 2 Cross-sectional view of the oral irrigator dispensing system in the first dispensing stage of the W-W line;

[0024] Figure 4 Displayed as Figure 3 Enlarged view of section A;

[0025] Figure 5 The image shows an isometric sectional view of the oral irrigator's liquid discharge system during the first discharge phase.

[0026] Figure 6 Displayed as along Figure 2 Cross-sectional view of the oral irrigator dispensing system of the W-W line during the second dispensing stage;

[0027] Figure 7 Displayed as Figure 6 Enlarged view of section B;

[0028] Figure 8 The image shows an isometric sectional view of the oral irrigator's liquid discharge system during the second discharge phase.

[0029] Figure 9 The image shows a partial cross-sectional view of the oral irrigator's liquid dispensing system during the first liquid suction stage.

[0030] Figure 10 This is a partial cross-sectional view of the oral irrigator's liquid dispensing system during the second liquid suction phase.

[0031] Figure 11 Shown as a cross-sectional view of the working components of the liquid pump;

[0032] Figure 12 The diagram shows a cross-sectional view of the liquid pump unit.

[0033] Figure 13 The graph shows the pulse flow rate variation of the liquid pump unit.

[0034] Component designation explanation

[0035] 1. Liquid pump unit

[0036] 11. Liquid pump chamber

[0037] 12. Working components of a liquid pump

[0038] 121 Plunger Body

[0039] 121a Upper section of plunger

[0040] 121b Waist-cinching section

[0041] 121c Lower section of plunger

[0042] 122 Groove

[0043] 13 Throttling cavity

[0044] 14 Pump head chamber

[0045] 15 Sliding fit cavity

[0046] 16. Widen the cavity

[0047] 17 Annular mounting groove

[0048] 2. Inlet check valve

[0049] 3. Liquid inlet channel

[0050] 31 Vertical extension

[0051] 32 Lateral extension

[0052] 4. Discharge check valve

[0053] 5. Liquid outlet channel

[0054] 51 Nozzle insertion hole

[0055] 52. Diversion Channel

[0056] 6 Throttling Flow Channel

[0057] 7. Liquid-tight system

[0058] 71 First sealing structure

[0059] 711 Wear-resistant sealing ring

[0060] 712 Elastic Sealing Ring

[0061] 72 Second sealing structure

[0062] 8. Outer shell

[0063] 9. Drive unit

[0064] 91 Transmission Mechanism

[0065] 92 Drive mechanism Detailed Implementation

[0066] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0067] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0068] exist Figure 4 , Figure 7 , Figure 9 as well as Figure 10 In the diagram, the solid black curved arrows indicate the direction of liquid flow, while the non-solid straight arrows indicate the direction of movement of the pump working element 12 of the pump device 1.

[0069] In order to make the water flosser water-saving, such as Figures 1 to 10 As shown, the present invention provides a water flosser dispensing system, comprising:

[0070] The liquid pump device 1 includes a liquid pump chamber 11 and a liquid pump working element 12 slidably disposed in the liquid pump chamber 11. The liquid pump working element 12 defines the pump chamber of the liquid pump chamber 11 into a throttling chamber 13 and a pump head chamber 14 that are mutually connectable and disconnectable.

[0071] Liquid inlet channel 3 is connected to pump head chamber 14 via liquid inlet check valve 2;

[0072] The liquid outlet channel 5 is connected to the pump head chamber 14 via the liquid outlet check valve 4.

[0073] Throttling channel 6, which is connected to throttling cavity 13;

[0074] The discharge stroke of the above-mentioned liquid pump working element 12 includes a first discharge stage and a second discharge stage connected to the first discharge stage. During the first discharge stage, the pump head chamber 14 and the throttling chamber 13 are in a disconnected state. During the second discharge stage, the pump head chamber 14 and the throttling chamber 13 are in a connected state so that part of the liquid in the pump head chamber 14 flows back to the throttling channel 6 through the throttling chamber 13.

[0075] In this invention, the discharge stroke of the aforementioned liquid pump working element 12 includes a first discharge stage and a second discharge stage following the first discharge stage. Similarly, the suction stroke of the aforementioned liquid pump working element 12 includes a first suction stage and a second suction stage following the first suction stage. That is, the aforementioned liquid pump working element 12 must sequentially complete the first discharge stage, the second discharge stage, the first suction stage, and the second suction stage within one operating cycle. The time of the first discharge stage is equal to the time of the second suction stage, and the time of the second discharge stage is equal to the time of the first suction stage.

[0076] The aforementioned liquid pump device 1 is installed inside the housing 8 of the water flosser. The liquid pump working element 12 of the liquid pump device 1 performs linear reciprocating motion within the liquid pump cavity 11 under the drive of a drive device 9. The drive device 9 can be an existing drive structure. For example, the drive device 9 includes a drive mechanism 92 and a transmission mechanism 91. The drive mechanism 92 can be a motor, and the transmission mechanism 91 can be a cam transmission assembly. The drive mechanism 92 is connected to the liquid pump working element 12 through the transmission mechanism 91.

[0077] In the oral irrigator liquid dispensing system of the present invention, the basic working principle of the above-mentioned liquid pump device 1 during the liquid suction and dispensing strokes is as follows:

[0078] like Figure 9 and Figure 10 As shown, when the working element 12 of the liquid pump is pulled back by the drive device 9 to perform the suction stroke, the internal pressure of the pump head chamber 14 of the pump chamber increases, the inlet check valve 2 switches to the open state, and the outlet check valve 4 switches to the closed state. The liquid can overcome the closing pre-tightening force of the inlet check valve 2 and flow into the pump head chamber 14 of the pump chamber.

[0079] like Figure 6 , Figure 7 as well as Figure 8As shown, when the pump working element 12 is pushed out by the drive device 9 to perform the discharge stroke, the internal pressure of the pump head chamber 14 increases, the inlet check valve 2 switches to the closed state, the outlet check valve 4 switches to the open state, and the liquid in the pump head chamber 14 is squeezed into the outlet flow channel 5 by the pump working element 12, and finally ejected from the nozzle of the irrigator.

[0080] The main innovation of the oral irrigator dispensing system of the present invention lies in the fact that the dispensing system achieves throttling during the dispensing stroke of the aforementioned pump working element 12. Specifically, the pump working element 12 defines the pump chamber of the pump body 11 into a throttling chamber 13 and a pump head chamber 14 that are mutually connectable and disconnectable. The volume of the throttling chamber 13 is fixed and moves synchronously up and down with the pump working element 12. The volume of the pump head chamber 14 changes. The pump head chamber 14 gradually decreases during the dispensing stroke of the pump working element 12 and gradually increases during the suction stroke of the pump working element 12.

[0081] like Figure 3 , Figure 4 as well as Figure 5 As shown, when the working element 12 of the liquid pump performs the first discharge stage of the discharge stroke, the pump head chamber 14 and the throttling chamber 13 are in a state of isolation, and the liquid in the pump head chamber 14 can only be squeezed into the discharge channel 5 by the working element 12 of the liquid pump.

[0082] like Figure 6 , Figure 7 as well as Figure 8 As shown, when the pump's working element 12 performs the second discharge stage of the discharge stroke, the pump head chamber 14 and the throttling chamber 13 are in communication. A portion of the liquid in the pump head chamber 14 is forced into the outlet channel 5 by the pump's working element 12, while another portion of the liquid in the pump head chamber 14 flows back to the throttling channel 6 through the throttling chamber 13, thus achieving the throttling function. The throttling channel 6 can be connected to the liquid storage tank (e.g., water tank) of the oral irrigator or to the inlet channel 3.

[0083] like Figure 9 As shown, when the working element 12 of the liquid pump performs the first suction stage of the suction stroke, the pump head chamber 14 and the throttling chamber 13 are in a connected state. The liquid in the inlet channel 3 flows into the pump head chamber 14 through the inlet check valve 2. At the same time, the liquid in the throttling channel 6 also flows into the pump head chamber 14 through the throttling chamber 13.

[0084] like Figure 10 As shown, when the working element 12 of the liquid pump performs the second suction stage of the suction stroke, the pump head chamber 14 and the throttling chamber 13 are in a state of isolation. The liquid in the inlet channel 3 flows into the pump head chamber 14 through the inlet check valve 2. However, the liquid in the throttling channel 6 can no longer flow into the pump head chamber 14 through the throttling chamber 13.

[0085] Therefore, the oral irrigator liquid dispensing system of this application can recover a portion of the liquid in the later stage of the dispensing stroke and re-inhale the recovered liquid into the pump head chamber 14, thereby making more effective use of oral cleaning fluid and increasing the single-use time of the oral irrigator. In addition, due to the recovery of a portion of the oral cleaning fluid, the shape of the pulse jet is different, bringing a new rinsing experience.

[0086] To achieve the post-peak water-saving function of the oral irrigator, the transition point between the first and second drainage stages is after the peak flow rate of the pump device 1. For example... Figure 13 As shown, the high-flow stage and low-flow stage of the oral irrigator of the present invention are defined as follows:

[0087] Experimental testing can be used to collect flow data of the oral irrigator during operation, thereby obtaining the pulse flow rate variation relationship between the flow rate and time. Generally, this pulse flow rate variation relationship is expressed as a pulse flow rate variation graph; in this graph, the horizontal axis represents time, and the vertical axis represents flow rate. Next, based on the required flushing force of the jet when rinsing the user's mouth, flow rate thresholds can be determined. Within a single pulse cycle, the area defined by the flow rate curve and the time axis in the pulse flow rate variation graph can be divided into a high-flow-rate sprayable region and a low-flow-rate backflow region. The peak data points in the pulse flow rate variation graph belong to the high-flow-rate sprayable region. max It is the peak flow rate, Q 分界值 This refers to the flow rate threshold. Based on this threshold, the region defined by the flow rate curve and time axis is divided into three areas: X (grid-filled), Y (diagonal-filled), and Z (grid-filled). The X area represents the low-flow recirculation region before the flow peak (i.e., the low-flow stage), where the flow velocity is relatively low. The Y area represents the high-flow sprayable region (i.e., the high-flow stage), where the flow velocity is relatively high, and the total flow rate in this area is used for oral rinsing. The Z area represents the low-flow recirculation region after the flow peak (i.e., the low-flow stage), where the flow velocity is also relatively low, and the liquid in this area can be recirculated. When the oral irrigator is currently in oral rinsing mode, the liquid in the pump unit 1 is ejected from the nozzle. When the oral irrigator is currently in throttling mode, a portion of the liquid in the pump chamber of the pump unit 1 after the high-flow stage is recirculated back to the throttling channel 6. The throttling channel 6 can be connected to the liquid storage tank or the inlet channel 3 of the oral irrigator. Therefore, please refer to [further details omitted]. Figure 13 , Figure 13 The t1 time point is the connection point between the first drainage stage and the second drainage stage.

[0088] like Figure 3 , Figure 4 , Figure 6 as well as Figure 7As shown, both the pump chamber of the pump body 11 and the pump working element 12 have a variable diameter structure to switch the isolation state between the pump head chamber 14 and the throttling chamber 13 to a connected state during the discharge stroke of the pump working element 12. Specifically, as shown... Figure 12 As shown, the pump chamber includes a sliding fit chamber 15 and a widened chamber 16, the diameter of which is larger than that of the sliding fit chamber 15. The pump working element 12 includes a plunger body 121, which is slidably disposed in the sliding fit chamber 15 with a gap seal. The outer peripheral wall of the plunger body 121 is provided with a groove 122 with an opening facing the throttling channel 6. The groove 122 and the pump chamber together define the throttling chamber 13. When the pump working element 12 performs the first discharge stage of the discharge stroke, the portion of the plunger body 121 located on the upper side of the groove 122 is gap-sealed in the sliding fit chamber 15, and the portion of the plunger body 121 located on the lower side of the groove 122 is also gap-sealed in the sliding fit chamber 15. The throttling chamber 13 is connected to the throttling channel 6, but the pump head chamber 14 and the throttling chamber 13 are isolated from each other. When the pump working element 12 performs the second discharge stage of the discharge stroke, the part of the plunger body 121 located on the upper side of the groove 122 extends into the widened cavity 16, that is, it is not in a gap seal fit with the sliding fit cavity 15. The part of the plunger body 121 located on the lower side of the groove 122 is still in a gap seal fit with the sliding fit cavity 15. The throttling cavity 13 is still connected to the throttling channel 6. The pump head cavity 14 and the throttling cavity 13 are connected to each other through the slit formed by the offset.

[0089] Furthermore, such as Figure 11 As shown, the groove 122 is arranged around the plunger body 121 to divide the plunger body 121 into an upper plunger section 121a, a waist-reducing section 121b, and a lower plunger section 121c connected axially in sequence. During the first liquid discharge stage, the upper plunger section 121a is in a clearance-sealed fit with the sliding fit cavity 15. During the second liquid discharge stage, the upper plunger section 121a extends into the widened cavity 16. The lower plunger section 121c is always in a clearance-sealed fit with the sliding fit cavity 15.

[0090] like Figure 3 and Figure 12 As shown, in order to achieve the liquid-tight function of the oral irrigator liquid dispensing system, the oral irrigator liquid dispensing system further includes a liquid-tight system 7. The liquid-tight system 7 includes a first sealing structure 71 and a second sealing structure 72. The first sealing structure 71 is disposed in one of the upper section 121a of the plunger and the liquid pump cavity 11 and can slide liquid-tightly between the other of the upper section 121a of the plunger and the liquid pump cavity 11. The second sealing structure 72 is disposed in one of the lower section 121c of the plunger and the liquid pump cavity 11 and can slide liquid-tightly between the lower section 121c of the plunger and the other of the liquid pump cavity 11.

[0091] To improve the service life of the aforementioned liquid-tight system 7, the first sealing structure 71 includes a wear-resistant sealing ring 711 and an elastic sealing ring 712. The wear-resistant sealing ring 711 is embedded in the annular mounting groove 17 of the pump chamber 11 and slides in a liquid-tight manner with the upper section 121a of the plunger. The elastic sealing ring 712 is embedded in the annular mounting groove 17 and abuts against the radially inner side of the wear-resistant sealing ring 711. To further improve the liquid-tightness of the first sealing structure 71, the elastic sealing ring 712 is in a compressed state to compensate for wear gaps after the wear-resistant sealing ring 711 wears. The first sealing structure 71 adopts a combined sealing ring structure. The wear-resistant sealing ring 711 is made of wear-resistant engineering plastic. When the wear-resistant sealing ring 711 wears, the elastic sealing ring 712 (shown as an O-ring) compresses the wear-resistant sealing ring 711 to complete wear compensation. Compared with a gap sealing structure, the combined sealing ring structure has lower requirements for dimensional accuracy.

[0092] To further improve the liquid tightness of the second sealing structure 72, the second sealing structure 72 is a V-shaped annular structure, with the groove opening of the second sealing structure 72 facing the throttling cavity 13. Specifically, the second sealing structure 72 includes an outer sealing lip and an inner sealing lip.

[0093] like Figure 12 As shown, in order to improve the compactness of the oral irrigator liquid outlet system, the liquid inlet channel 3 includes a vertical extension 31 and a horizontal extension 32 that is vertically connected to the vertical extension 31. One end of the throttling channel 6 is connected to the vertical extension 31 and the other end is connected to the throttling chamber 13. The liquid inlet one-way valve 2 is provided in the horizontal extension 32.

[0094] The above-mentioned liquid outlet channel 5 includes a nozzle insertion hole 51 and a flow guide channel 52 that are interconnected. The flow guide channel 52 can connect the liquid inlet channel 3 and the pump head chamber 14.

[0095] In summary, this invention can more effectively utilize oral cleaning fluid, increase the single-use time of the water flosser, and create a different pulse jet pattern, bringing a new rinsing experience. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0096] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A water flosser dispensing system, characterized in that, include: The liquid pump device (1) includes a liquid pump cavity (11) and a liquid pump working element (12) slidably disposed in the liquid pump cavity (11). The liquid pump working element (12) defines the pump cavity of the liquid pump cavity (11) into a throttling cavity (13) and a pump head cavity (14) that can be switched on and off. The liquid inlet channel (3) is connected to the pump head chamber (14) through the liquid inlet check valve (2). The liquid outlet channel (5) is connected to the pump head chamber (14) through the liquid outlet check valve (4). Throttling channel (6), which is connected to throttling cavity (13); The discharge stroke of the pump working element (12) includes a first discharge stage and a second discharge stage following the first discharge stage. During the first discharge stage, the pump head chamber (14) and the throttling chamber (13) are isolated. During the second discharge stage, the pump head chamber (14) and the throttling chamber (13) are connected so that part of the liquid in the pump head chamber (14) flows back to the throttling channel (6) through the throttling chamber (13). The pump chamber (11) and the pump working element (12) of the pump body (11) are both of variable diameter structure so that the isolation state between the pump head chamber (14) and the throttling chamber (13) is switched to the connected state during the discharge stroke of the pump working element (12).

2. The oral irrigator liquid dispensing system according to claim 1, characterized in that: The pump chamber includes a sliding fit chamber (15) and a widened chamber (16), the diameter of which is larger than that of the sliding fit chamber (15); the pump working element (12) includes a plunger body (121), which is slidably disposed in the sliding fit chamber (15) with a gap seal, and the outer peripheral wall of the plunger body (121) is provided with a groove (122) with an opening facing the throttling channel (6), the groove (122) and the pump chamber together define the throttling chamber (13).

3. The oral irrigator liquid dispensing system according to claim 2, characterized in that: The groove (122) is arranged around the plunger body (121) to divide the plunger body (121) into an upper plunger section (121a), a waist-reducing section (121b), and a lower plunger section (121c) connected axially in sequence. During the first liquid discharge stage, the upper plunger section (121a) is in a clearance-sealed fit with the sliding fit cavity (15). During the second liquid discharge stage, the upper plunger section (121a) extends into the widened cavity (16). The lower plunger section (121c) is always in a clearance-sealed fit with the sliding fit cavity (15).

4. The oral irrigator liquid dispensing system according to claim 1, characterized in that: The oral irrigator liquid dispensing system also includes a liquid-tight system (7), which includes a first sealing structure (71) and a second sealing structure (72). The first sealing structure (71) is located in one of the upper section of the plunger (121a) and the liquid pump chamber (11) and can slide liquid-tightly between the other of the upper section of the plunger (121a) and the liquid pump chamber (11). The second sealing structure (72) is located in one of the lower section of the plunger (121c) and the liquid pump chamber (11) and can slide liquid-tightly between the other of the lower section of the plunger (121c) and the liquid pump chamber (11).

5. The oral irrigator liquid dispensing system according to claim 4, characterized in that: The first sealing structure (71) includes a wear-resistant sealing ring (711) and an elastic sealing ring (712). The wear-resistant sealing ring (711) is embedded in the annular mounting groove (17) of the pump chamber (11) and slides in a liquid-tight manner with the upper section (121a) of the plunger. The elastic sealing ring (712) is embedded in the annular mounting groove (17) and abuts against the radial inner side of the wear-resistant sealing ring (711).

6. The oral irrigator liquid dispensing system according to claim 5, characterized in that: The elastic sealing ring (712) is in a compressed state to compensate for wear gaps after the wear-resistant sealing ring (711) wears down.

7. The oral irrigator liquid dispensing system according to claim 4, characterized in that: The second sealing structure (72) is a V-shaped annular structure, and the groove opening of the second sealing structure (72) faces the throttling cavity (13).

8. The oral irrigator liquid dispensing system according to claim 1, characterized in that: The transition point between the first and second drainage stages occurs after the peak flow rate of the liquid pump device (1).

9. The oral irrigator liquid dispensing system according to claim 1, characterized in that: The liquid inlet channel (3) includes a vertical extension (31) and a horizontal extension (32) that is vertically connected to the vertical extension (31). One end of the throttling channel (6) is connected to the vertical extension (31) and the other end is connected to the throttling chamber (13). The liquid inlet check valve (2) is located in the horizontal extension (32).

Images