CN111473137A

CN111473137A - One-way valve structure, pump body and cleaning appliance

Info

Publication number: CN111473137A
Application number: CN202010454884.3A
Authority: CN
Inventors: 曾国辉; 邓志龙; 邓志宏; 康津; 王国强
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-07-31

Abstract

The invention relates to a one-way valve structure, a pump body and a cleaning appliance. The cleaning appliance comprises a pump body or a one-way valve structure, the one-way valve structure comprises: the first valve body is provided with a first end face, a first channel penetrating through the first end face is arranged on the first valve body, and an outlet of the first channel is formed in the first end face; the second valve body is provided with a second channel in a penetrating manner, a first avoidance cavity is formed at the inlet of the second channel, the inlet of the second channel is the inlet of the first avoidance cavity, and the second valve body is connected with the first valve body so that the outlet of the first channel and at least part of the first end surface are opposite to the inlet of the first avoidance cavity; and the first valve sheet is fixedly connected with the first valve body and/or the second valve body, the first valve sheet is provided with a first water retaining part in spacing fit with the first end face, and the first water retaining part is movably arranged between the outlet of the first channel and the inlet of the first avoidance cavity.

Description

One-way valve structure, pump body and cleaning appliance

Technical Field

The invention relates to the technical field of valves, in particular to a one-way valve structure, a pump body and a cleaning appliance.

Background

A flossing device, also known as a tooth cleaner, is a cleaning device for cleaning the oral cavity by using water flow to clean the teeth and gaps between teeth. The tooth flusher can be divided into an electric tooth flusher and a water faucet tooth flusher according to the structure. The electric tooth flushing device mainly comprises a water pump, a water tank, a machine body, a spray head and the like; the structure of the tap tooth flushing device mainly comprises a connector and a spray head which are connected with the tap. And in traditional electronic tooth ware that washes one's teeth, mostly avoid water backward flow to the water tank through set up the duckbilled valve on the water pump, but the structure of duckbilled valve is complicated, and manufacturing cost is high.

Disclosure of Invention

In view of the above, there is a need to provide a one-way valve structure, a pump body and a cleaning implement for solving the problem of complicated structure of the conventional duckbill valve.

A one-way valve structure comprising: the valve comprises a first valve body and a second valve body, wherein the first valve body is provided with a first end surface, a first channel penetrating through the first end surface is arranged on the first valve body, and an outlet of the first channel is formed in the first end surface; the second valve body is provided with a second channel in a penetrating manner, a first avoidance cavity is formed at the inlet of the second channel, the inlet of the second channel is the inlet of the first avoidance cavity, and the second valve body is connected with the first valve body so that the outlet of the first channel and at least part of the first end surface are opposite to the inlet of the first avoidance cavity; the first valve sheet is fixedly connected with the first valve body and/or the second valve body and is provided with a first water retaining part in spacing fit with the first end face, and the first water retaining part is movably arranged between the outlet of the first channel and the inlet of the first avoidance cavity;

the first water retaining part can be flushed to the first avoidance cavity when receiving the pressure of water flowing from the first channel to the second channel so as to enable the first channel to be communicated with the second channel; and the first water retaining part is abutted by the first end surface when receiving the pressure of the water flowing from the second channel to the first channel so as to separate the first channel from the second channel.

In one embodiment, when the first water retaining part is in a state of separating the first channel from the second channel, the first water retaining part seals the outlet of the second channel and is attached to the first end face.

In one embodiment, the second valve body has a second end surface, the inlet of the second channel is formed on the second end surface, the second end surface is in face-to-face contact with the first end surface, and the first valve plate is supported between the second end surface and the first end surface.

In one embodiment, the first valve disk further includes a first outer ring, the first water blocking portion is disposed in the first outer ring and rotatably connected to the first outer ring, and the first outer ring is clamped between the first end surface and the second end surface.

In one embodiment, a first limiting portion is arranged on a cavity wall of the first avoidance cavity and used for limiting and matching with the first water blocking portion, so that when the first water blocking portion is flushed into the first avoidance cavity, the rotation angle of the first water blocking portion is smaller than 90 degrees.

In one embodiment, the cavity wall of the first avoidance cavity comprises a first cavity wall opposite to the inlet of the first avoidance cavity, and the first limiting part is arranged on the first cavity wall.

In one embodiment, the one-way valve structure further comprises a third valve body and a second valve sheet;

the third valve body is provided with a third end face, a third channel penetrating through the third end face is arranged on the third valve body, an outlet of the third channel is formed in the third end face, a second avoidance cavity is formed at an inlet of the first channel, the inlet of the first channel is an inlet of the second avoidance cavity, and the third valve body is connected with the first valve body so that the outlet of the third channel and at least part of the third end face are opposite to the inlet of the second avoidance cavity;

the second valve sheet is fixedly connected with the first valve body and/or the third valve body, the second valve sheet is provided with a second water retaining part in limit fit with the third end face, and the second water retaining part is movably arranged between an outlet of the third channel and an inlet of the second avoidance cavity;

the second water retaining part can be flushed to the second avoidance cavity when being subjected to the pressure of water flowing from the third channel to the first channel, so that the third channel is communicated with the second channel; and the second water retaining part is supported by the third end surface when receiving the pressure of the water flowing from the first channel to the third channel so as to separate the first channel from the third channel.

In one embodiment, when the second water retaining part is in a state of separating the first channel from the third channel, the second water retaining part seals the outlet of the third channel and is attached to the third end surface.

In one embodiment, the first valve body has a fourth end surface, the inlet of the first passage is formed on the fourth end surface, the fourth end surface is in face-to-face contact with the third end surface, and the second valve plate is abutted between the third end surface and the fourth end surface.

In one embodiment, the second valve plate further includes a second outer ring, the second water blocking portion is disposed in the second outer ring and is rotatably connected to the second outer ring, and the second outer ring is clamped between the third end surface and the fourth end surface.

In one embodiment, a second limiting portion is arranged on the wall of the second avoiding cavity, and the second limiting portion is used for being in limiting fit with the second water retaining portion, so that when the second water retaining portion is flushed into the second avoiding cavity, the rotation angle of the second water retaining portion is smaller than 90 °.

In one embodiment, the cavity wall of the second avoidance cavity comprises a second cavity wall opposite to the inlet of the second avoidance cavity, and the second limiting part is arranged on the second cavity wall.

A pump body, comprising: according to the one-way valve structure, the first valve body is also provided with an inner cavity communicated with the first channel; the piston is movably arranged in the inner cavity and divides the inner cavity into a first cavity and a second cavity, and the first cavity is communicated with the first channel; the driving mechanism is in driving connection with the piston and is used for driving the piston to move in the inner cavity so as to change the volume size of the first chamber.

A cleaning appliance comprising: a one-way valve structure as described above, or a pump body as described above.

In the check valve structure, the pump body and the cleaning appliance, the on-off between the first channel and the second channel is controlled by the first valve plate, and the first valve plate cuts off the first channel and the second channel under the normal state, namely under the condition that the first valve plate is not subjected to external force. When water flows from the first channel to the second channel, the water can flush the first valve sheet open, so that the first channel is communicated with the second channel. If water is to flow from the second channel to the first channel, after the water impacts the first valve sheet, the first valve sheet is supported on the first end face and seals the outlet of the first channel to separate the first channel from the second channel. The one-way valve can realize one-way flow of water flow in the one-way valve through the first valve plate, and has the advantages of simple structure and low manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a check valve structure according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a check valve according to a second embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second valve body according to the first or second embodiment of the invention;

FIG. 4 is a schematic view of the first or second valve flap;

FIG. 5 is a schematic structural diagram of a pump body according to a fourth embodiment of the present invention;

fig. 6 is a schematic view of a partially enlarged structure at a of the graph shown in fig. 5.

Description of reference numerals:

10. a first valve body; 11. a first channel; 110. a second avoidance cavity; 12. a first end face; 13. a fourth end face; 14. a second limiting part; 15. an inner cavity; 151. a first chamber; 20. a second valve body; 21. a second channel; 210. a first avoidance cavity; 22. a second end face; 23. a first limiting part; 30. a third valve body; 31. a third channel; 32. a third end face; 40. a first valve plate; 41. a first water blocking part; 42. a first outer ring; 50. a second valve plate; 51. a second water retaining part; 52. a second outer ring; 60. a piston; 70. a drive mechanism; 71. a motor; 72. a gear; 73. a connecting rod; 80. and (5) sealing rings.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, a check valve structure according to an embodiment includes a first valve body 10, a second valve body 20, and a first valve plate 40.

As shown in fig. 1, the first valve body 10 has a first end surface 12, the first valve body 10 is provided with a first passage 11 penetrating the first end surface 12, and an outlet of the first passage 11 is formed at the first end surface 12. The first valve body 10 is a hollow structure having a first passage 11, the first passage 11 penetrates the whole first valve body 10, and an outlet of the first passage 11 is formed at a first end surface 12 of the first valve body 10. The first end surface 12 may be a plane or a curved surface, and specifically, in this embodiment, the first end surface 12 is a plane.

As shown in fig. 1 and 3, the second valve body 20 is provided with a second passage 21, a first avoidance cavity 210 is formed at an inlet of the second passage 21, and an inlet of the second passage 21 is an inlet of the first avoidance cavity 210. The second valve body 20 has a hollow structure having a second passage 21, and the second passage 21 extends through the entire second valve body 20. In the second channel 21, a section near an inlet of the second channel 21 forms a first avoidance cavity 210, and the inlet of the second channel 21 is an inlet of the first avoidance cavity 210; in other words, the first bypass chamber 210 is a part of the second passage 21, and the first bypass chamber 210 is formed at the inlet of the second passage 21.

As shown in fig. 1, the second valve body 20 is connected to the first valve body 10 such that the outlet of the first passage 11 and at least a portion of the first end surface 12 are opposite to the inlet of the first bypass chamber 210. The area of the inlet of the first bypass chamber 210 is larger than the area of the outlet of the first passage 11, after the second valve body 20 is connected to the first valve body 10, the second valve body 20 covers the outlet of the first passage 11, and the inlet of the first bypass chamber 210 is opposite to the outlet of the first passage 11 and at least a portion of the first end surface 12.

As shown in fig. 1 and 4, the first valve sheet 40 is fixedly connected to the first valve body 10 and/or the second valve body 20, and the first valve sheet 40 has a first water blocking portion 41 in a position-limited fit with the first end surface 12, and the first water blocking portion 41 is movably disposed between an outlet of the first passage 11 and an inlet of the first avoidance cavity 210; wherein the first water guard 41 can be flushed toward the first avoidance cavity 210 when receiving the pressure of the water flowing from the first channel 11 to the second channel 21, so that the first channel 11 is communicated with the second channel 21; and the first water blocking portion 41 is pressed by the first end surface 12 when receiving the pressure of the water flowing from the second passage 21 to the first passage 11, so as to block the first passage 11 and the second passage 21.

In the above-mentioned check valve structure, the on-off between the first passage 11 and the second passage 21 is controlled by the first valve piece 40, and in a normal state, that is, under the condition that the first valve piece 40 is not subjected to an external force, the first valve piece 40 blocks the first passage 11 and the second passage 21. When water flows from the first channel 11 to the second channel 21, the water is able to flush the first valve disk 40 open, such that the first channel 11 is in communication with the second channel 21. If the water is about to flow from the second channel 21 to the first channel 11, after the water impacts the first valve piece 40, the first valve piece 40 is abutted against the first end face 12 and seals the outlet of the first channel 11, so as to separate the first channel 11 from the second channel 21. The one-way valve structure can realize the one-way flow of water flow in the one-way valve structure through the first valve sheet 40, and has simple structure and low manufacturing cost.

As shown in fig. 1, the second valve body 20 has a second end surface 22, an inlet of the second channel 21 is formed on the second end surface 22, the second end surface 22 is abutted with the first end surface 12, and the first valve plate 40 is abutted between the second end surface 22 and the first end surface 12. The second channel 21 penetrates the whole second valve body 20, the second channel 21 penetrates the second end face 22, an inlet of the second channel 21 is formed in the second end face 22, after the first valve body 10 and the second valve body 20 are assembled together, the second end face 22 of the second valve body 20 is opposite to the first end face 12 of the first valve body 10, and the first valve sheet 40 is abutted between the first end face 12 and the second end face 22 to realize fixation. Specifically, in the present embodiment, the second end surface 12 and the first end surface 22 are both planar.

Of course, in other embodiments, the first valve piece 40 may be fixed to the first end surface 12 or the second end surface 22 by welding or bonding.

As shown in fig. 1 and 4, specifically, the first valve plate 40 further includes a first outer ring 42, the first water blocking portion 41 is disposed in the first outer ring 42 and rotatably connected to the first outer ring 42, and the first outer ring 42 is clamped between the first end surface 12 and the second end surface 22. The first outer ring 42 is clamped between the first end face 12 and the second end face 22 to realize fixation, and the first water blocking portion 41 is rotatably connected with the first outer ring 42 to control the on-off of the first channel 11 and the second channel 21.

More specifically, the first outer ring 42 is annular, the first water blocking portion 41 is a circular or square piece, the first water blocking portion 41 is located inside the first outer ring 42, and a part of the outer periphery of the first water blocking portion 41 is connected to the inner wall of the first outer ring 42, so that the first water blocking portion 41 is rotatably connected to the first outer ring 42.

Specifically, in the embodiment, the first water retaining portion 41 and the first outer ring 42 are an integral structure, and the first water retaining portion 41 and the first outer ring 42 are made of a polyimide material. The polyimide material has high fatigue strength, high frequency response characteristic and high restoring force. Therefore, the water in the first passage 11 hits the first water guard 41 and the first water guard 41 is flushed away, so that the pressure loss of the water is small.

Further, when the first water blocking portion 41 is in a state of blocking the first passage 11 and the second passage 21, the first water blocking portion 41 seals the outlet of the second passage 21 and is attached to the first end surface 12. When the first water blocking portion 41 is in a state of blocking the first channel 11 and the second channel 21, the first water blocking portion 41 is attached to the first end surface 12, so that the effect of improving the sealing performance can be achieved, and water is prevented from flowing through a gap between the first water blocking portion 41 and the first end surface 12, so that water is prevented from flowing into the first channel 11 from the second channel 21.

As shown in fig. 1 and 3, a first limiting portion 23 is disposed on a wall of the first avoidance cavity 210, and the first limiting portion 23 is used for limiting and matching with the first water blocking portion 41, so that when the first water blocking portion 41 is flushed into the first avoidance cavity 210, a rotation angle of the first water blocking portion 41 is smaller than 90 °. After the first water blocking portion 41 is flushed by the water in the first channel 11, the first water blocking portion 41 rotates by a certain angle, and the angle changes along with the water pressure in the first channel 11, and in order to avoid the situation that the first water blocking portion 41 cannot be reset due to an excessively large rotation angle, the first limiting portion 23 is arranged on the cavity wall of the first avoidance cavity 210, so that the rotation angle of the first water blocking portion 41 is within a range smaller than 90 degrees, and the situation that the first water blocking portion 41 cannot be reset can be avoided.

Specifically, the cavity wall of the first avoidance cavity 210 includes a first cavity wall opposite to the inlet of the first avoidance cavity 210, and the first limiting portion 23 is disposed on the first cavity wall. The first limiting portion 23 is a protrusion disposed on the first cavity wall, the first limiting portion 23 is opposite to the inlet of the first avoiding cavity 210, and the first limiting portion 23 is opposite to the first water blocking portion 41. After the first water blocking portion 41 is flushed away and the first water blocking portion 41 abuts against the first limiting portion 23, the first limiting portion 23 limits the first water blocking portion 41 to continue rotating.

It should be noted that the maximum angle that the first water blocking portion 41 can rotate can be changed by changing the size of the first water blocking portion 41 and the distance between the first water blocking portion 41 and the first limiting portion 23, specifically, in this embodiment, the first water blocking portion 41 is set to rotate by 30 ° at the maximum angle under the action of the first limiting portion 23.

As shown in fig. 2, the second embodiment relates to a one-way valve structure, which is different from the one-way valve structure according to the first embodiment in that the one-way valve structure further includes a third valve body 30 and a second valve piece 50.

The third valve body 30 has a third end surface 32, the third valve body 30 is provided with a third passage 31 penetrating the third end surface 32, and an outlet of the third passage 31 is formed at the third end surface 32. The third valve body 30 is a hollow structure having a third passage 31, the third passage 31 extends through the entire third valve body 30, and an outlet of the third passage 31 is formed at a third end surface 32 of the third valve body 30. The third end surface 32 may be a plane or a curved surface, and specifically, in this embodiment, the third end surface 32 is a plane.

A second avoidance cavity 110 is formed at an inlet of the first channel 11 of the first valve body 10, and the inlet of the first channel 11 is an inlet of the second avoidance cavity 110. In the first channel 11, a section near an inlet of the first channel 11 forms a second avoidance cavity 110, and the inlet of the first channel 11 is an inlet of the second avoidance cavity 110; in other words, the second avoidance chamber 110 is a part of the first passage 11, and the second avoidance chamber 110 is formed at the entrance of the first passage 11.

The third valve body 30 is connected to the first valve body 10 such that the outlet of the third passage 31 and at least a portion of the third end surface 32 are opposite to the inlet of the second avoidance chamber 110. The area of the inlet of the second avoidance chamber 110 is larger than the area of the outlet of the third passage 31, after the third valve body 30 is connected to the first valve body 10, the first valve body 10 covers the outlet of the third passage 31, and the inlet of the second avoidance chamber 110 is opposite to at least part of the outlet of the third passage 31 and the third end surface 32.

As shown in fig. 2 and 4, the second valve plate 50 is fixedly connected to the first valve body 10 and/or the third valve body 30, and the second valve plate 50 has a second water retaining part 51 in a position-limited fit with the third end surface 32, and the second water retaining part 51 is movably disposed between the outlet of the third channel 31 and the inlet of the second avoidance cavity 110; wherein the second water retaining portion 51 can be flushed toward the second avoidance cavity 110 when receiving the pressure of the water flowing from the third channel 31 to the first channel 11, so that the third channel 31 is communicated with the second channel 21; and the second water stop portion 51 is held by the third end surface 32 when receiving the pressure of the water flowing from the first channel 11 to the third channel 31, so as to block the first channel 11 and the third channel 31.

The on-off between the first channel 11 and the third channel 31 is controlled by the second valve plate 50, and in a normal state, that is, under the condition that the second valve plate 50 is not subjected to external force, the second valve plate 50 cuts off the first channel 11 and the third channel 31. When water flows from the third passage 31 to the first passage 11, the water can flush the second valve flap 50 open, so that the first passage 11 communicates with the third passage 31. If water is to flow from the first channel 11 to the third channel 31, after the water impacts the second valve plate 50, the second valve plate 50 abuts against the second end surface 22 and seals the outlet of the third channel 31, and the first channel 11 and the third channel 31 are isolated.

As shown in fig. 2, further, the first valve body 10 has a fourth end surface 13, an inlet of the first channel 11 is formed on the fourth end surface 13, the fourth end surface 13 is abutted with the third end surface 32, and the second valve plate 50 is abutted between the third end surface 32 and the fourth end surface 13. The first channel 11 penetrates the whole first valve body 10, the first channel 11 penetrates the fourth end surface 13, an inlet of the first channel 11 is formed on the fourth end surface 13, after the first valve body 10 and the third valve body 30 are assembled together, the third end surface 32 of the third valve body 30 is opposite to the fourth end surface 13 of the first valve body 10, and the second valve piece 50 is supported between the third end surface 32 and the fourth end surface 13, so that fixation is realized.

Of course, in other embodiments, the second valve plate 50 may be fixed to the third end surface 32 or the fourth end surface 13 by welding or bonding.

As shown in fig. 2 and 4, specifically, the second valve plate 50 further includes a second outer ring 52, the second water retaining part 51 is disposed in the second outer ring 52 and is rotatably connected to the second outer ring 52, and the second outer ring 52 is held between the third end surface 32 and the fourth end surface 13. The second outer ring 52 is clamped between the third end surface 32 and the fourth end surface 13 to realize fixation, and the second water retaining part 51 is rotatably connected with the second outer ring 52 to control the on-off of the first channel 11 and the third channel 31.

More specifically, the second outer ring 52 is annular, the second water retaining part 51 is a circular or square piece, the second water retaining part 51 is located inside the second outer ring 52, and a part of the outer periphery of the second water retaining part 51 is connected to the inner wall of the second outer ring 52, so that the second water retaining part 51 is rotatably connected to the second outer ring 52.

Specifically, in the present embodiment, the second water retaining part 51 and the second outer ring 52 are an integral structure, and both the second water retaining part 51 and the second outer ring 52 are made of a polyimide material. The polyimide material has high fatigue strength, high frequency response characteristic and high restoring force. Therefore, the water in the third passage 31 hits the first water stopper 41 and the second water stopper 51 is opened, so that the water pressure loss is small.

Further, when the second water retaining part 51 is in a state of separating the first channel 11 from the third channel 31, the second water retaining part 51 seals the outlet of the third channel 31 and is attached to the third end surface 32. When the second water retaining part 51 is in a state of separating the first channel 11 from the third channel 31, the second water retaining part 51 is attached to the third end surface 32, so that an effect of improving the sealing performance can be achieved, and water is prevented from flowing through a gap between the second water retaining part 51 and the third end surface 32, so that water is prevented from flowing into the third channel 31 from the first channel 11.

As shown in fig. 2 and 3, a second limiting portion 14 is disposed on a wall of the second avoidance cavity 110, and the second limiting portion 14 is used for limiting and matching with the second water stop portion 51, so that when the second water stop portion 51 is flushed into the second avoidance cavity 110, a rotation angle of the second water stop portion 51 is smaller than 90 °. After the second water retaining part 51 is washed away by the water in the third channel 31, the second water retaining part 51 rotates by a certain angle, the angle changes along with the water pressure in the third channel 31, and in order to avoid the situation that the second water retaining part 51 cannot be reset due to an overlarge rotation angle, the second limiting part 14 is arranged on the cavity wall of the second avoidance cavity 110, so that the rotation angle of the second water retaining part 51 is in the range smaller than 90 degrees, and the situation that the second water retaining part 51 cannot be reset can be avoided.

Specifically, the cavity wall of the second avoidance cavity 110 includes a second cavity wall opposite to the inlet of the second avoidance cavity 110, and the second limiting portion 14 is disposed on the second cavity wall. The second limiting portion 14 is a protrusion disposed on the wall of the second cavity, the second limiting portion 14 is opposite to the inlet of the second avoiding cavity 110, and the second limiting portion 14 is opposite to the second water stop portion 51. After the second water stop portion 51 is opened and the second water stop portion 51 abuts against the second position-limiting portion 14, the second position-limiting portion 14 limits the second water stop portion 51 to continue rotating.

It should be noted that the maximum angle that the second water-retaining part 51 can rotate can be changed by changing the size of the second water-retaining part 51 and the distance between the second water-retaining part 51 and the second stopper part 14, and specifically, in the present embodiment, the second water-retaining part 51 is set to rotate by 30 ° at the maximum angle under the action of the second stopper part 14

As shown in fig. 1 and 5, the third embodiment relates to a pump body, which includes: the one-way valve structure, piston 60, and drive mechanism 70 described in the first embodiment above.

The first valve body 10 is also provided with an inner cavity 15 communicated with the first channel 11; the piston 60 is movably arranged in the inner cavity 15 and divides the inner cavity 15 into a first chamber 151 and a second chamber, wherein the first chamber 151 is communicated with the first channel 11; the driving mechanism 70 is drivingly connected to the piston 60 for driving the piston 60 to move within the internal cavity 15 to change the volume of the first chamber 151.

In the initial state, the first valve disk 40 blocks the outlet of the first channel 11. When water is needed, the driving mechanism 70 drives the piston 60 to move, so that the volume of the first chamber 151 is reduced, the water pressure in the first channel 11 is increased in the process that the volume of the first chamber 151 is reduced, and then the first water blocking part 41 is flushed away, and the communication between the first channel 11 and the second channel 21 is realized. When water is needed, the piston 60 is moved by the driving mechanism 70, so that the volume of the first chamber 151 is increased, the pressure of the first chamber 151 is reduced in the process of increasing the volume of the first chamber 151, and when the pressure is reduced to a certain degree, the first water blocking part 41 is reset to block the outlet of the first passage 11.

Specifically, the driving mechanism 70 includes a motor 71, a gear 72 driven to rotate by the motor 71, an eccentric wheel driven to rotate by the gear 72, and a connecting rod 73 connected to the eccentric wheel, the connecting rod 73 being connected to the piston 60. The motor 71 drives the eccentric wheel to rotate through the driving gear 72, and the eccentric wheel drives the connecting rod 73 to swing, thereby driving the piston 60 to reciprocate in the inner cavity.

In other embodiments, the driving mechanism may also be a motor screw structure, and the motor screw structure is connected to the piston and is used for driving the piston to reciprocate in the inner cavity.

As shown in fig. 2 and 5, the fourth embodiment relates to a pump body, which is different from the third embodiment in that the pump body includes a check valve structure as described in the second embodiment.

In the initial state, the first valve plate 40 blocks the outlet of the first passage 11, and the second valve plate 50 blocks the outlet of the third passage 31. When water is needed, the driving mechanism 70 firstly drives the piston 60 to move, so that the volume of the first chamber 151 is increased, the pressure of the first chamber 151 is reduced, and the water in the third channel 31 is enabled to flush the second valve sheet 50 and then flows into the first channel 11 from the third channel 31; then, the driving mechanism 70 drives the piston 60 to move again, so that the volume of the first chamber 151 is reduced, the first channel 11 and the water in the first chamber 151 exert pressure on the first water retaining part 41 under the action of the piston 60, and the first water retaining part 41 is flushed away, so that the water flows into the second channel 21.

An embodiment also relates to a cleaning appliance comprising: the check valve structure according to the first embodiment or the second embodiment, or the pump body according to the third embodiment or the fourth embodiment.

Optionally, the cleaning appliance is a dental irrigator.

In the above cleaning device, the on-off between the first channel 11 and the second channel 21 is controlled by the first valve 40, and in a normal state, that is, under the condition that the first valve 40 is not subjected to an external force, the first valve 40 blocks the first channel 11 and the second channel 21. When water flows from the first channel 11 to the second channel 21, the water is able to flush the first valve disk 40 open, such that the first channel 11 is in communication with the second channel 21. If the water is about to flow from the second channel 21 to the first channel 11, after the water impacts the first valve piece 40, the first valve piece 40 is abutted against the first end face 12 and seals the outlet of the first channel 11, so as to separate the first channel 11 from the second channel 21. The one-way valve structure can realize the one-way flow of water flow in the one-way valve structure through the first valve sheet 40, and has simple structure and low manufacturing cost.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A check valve structure, comprising:

the valve comprises a first valve body and a second valve body, wherein the first valve body is provided with a first end surface, a first channel penetrating through the first end surface is arranged on the first valve body, and an outlet of the first channel is formed in the first end surface;

the second valve body is provided with a second channel in a penetrating manner, a first avoidance cavity is formed at the inlet of the second channel, the inlet of the second channel is the inlet of the first avoidance cavity, and the second valve body is connected with the first valve body so that the outlet of the first channel and at least part of the first end surface are opposite to the inlet of the first avoidance cavity; and

the first valve sheet is fixedly connected with the first valve body and/or the second valve body and is provided with a first water retaining part in limit fit with the first end face, and the first water retaining part is movably arranged between the outlet of the first channel and the inlet of the first avoidance cavity;

2. The check valve structure of claim 1, wherein the first water blocking portion seals the outlet of the second passage and abuts the first end surface when the first water blocking portion is in a state of blocking the first passage from the second passage.

3. The check valve structure of claim 1, wherein the second valve body has a second end surface, the inlet of the second passage is formed on the second end surface, the second end surface is in face-to-face contact with the first end surface, and the first valve plate is abutted between the second end surface and the first end surface.

4. The check valve structure of claim 3, wherein the first disk further comprises a first outer ring, the first water stop is disposed in the first outer ring and rotatably connected to the first outer ring, and the first outer ring is clamped between the first end surface and the second end surface.

5. The check valve structure according to claim 1, wherein a first limiting portion is disposed on a wall of the first avoiding cavity, and the first limiting portion is used for limiting and matching with the first water blocking portion, so that when the first water blocking portion is flushed into the first avoiding cavity, a rotation angle of the first water blocking portion is smaller than 90 °.

6. The check valve structure of claim 5, wherein the chamber wall of the first avoidance chamber comprises a first chamber wall opposite to the inlet of the first avoidance chamber, and the first limiting portion is disposed on the first chamber wall.

7. The check valve structure according to any one of claims 1 to 6, further comprising a third valve body and a second valve piece;

8. The check valve structure of claim 7, wherein the second water retaining portion seals an outlet of the third channel and is attached to the third end surface when the second water retaining portion is in a state of separating the first channel from the third channel.

9. The check valve structure of claim 7, wherein the first valve body has a fourth end surface, the inlet of the first passage is formed on the fourth end surface, the fourth end surface is in face-to-face engagement with the third end surface, and the second valve plate is held in abutment between the third end surface and the fourth end surface.

10. The structure of claim 9, wherein the second flap further comprises a second outer ring, the second water stop is disposed in the second outer ring and rotatably connected to the second outer ring, and the second outer ring is captured between the third end surface and the fourth end surface.

11. The check valve structure of claim 7, wherein a second limiting portion is disposed on a wall of the second avoiding cavity, and the second limiting portion is used for limiting and matching with the second water retaining portion, so that when the second water retaining portion is flushed into the second avoiding cavity, a rotation angle of the second water retaining portion is smaller than 90 °.

12. The check valve structure of claim 11, wherein the chamber wall of the second avoidance chamber comprises a second chamber wall opposite the inlet of the second avoidance chamber, and the second limiting portion is disposed on the second chamber wall.

13. A pump body, comprising:

a one-way valve structure as defined in any one of claims 1 to 12, said first valve body further being provided with an internal cavity communicating with said first passage;

the piston is movably arranged in the inner cavity and divides the inner cavity into a first cavity and a second cavity, and the first cavity is communicated with the first channel;

the driving mechanism is in driving connection with the piston and is used for driving the piston to move in the inner cavity so as to change the volume size of the first chamber.

14. A cleaning implement, comprising:

a one-way valve structure as claimed in any one of claims 1 to 12 or a pump body as claimed in claim 13.