Water pump assembly and oral irrigator

Abstract

The utility model discloses a water pump assembly and an oral irrigator, and relates to the field of water pumps, the water pump assembly comprises a shell, a pump body arranged in the shell and a driving assembly; the pump body comprises a pump shell, a pump membrane end cover, a water inlet and outlet sleeve, a pump membrane and a state switching assembly. A pump cavity is formed in the pump shell, the switching assembly comprises a water inlet valve and a water outlet valve, and the water outlet valve is in clearance fit with the water inlet and outlet sleeve. The driving assembly drives the pump membrane to move in the direction close to or away from the pump cavity, so that the pressure intensity in the pump cavity is changed, then the switching assembly opens the water outlet channel or the water inlet channel, water pumping or water pumping of the water pump is achieved, and due to the fact that the water outlet valve piece is in clearance fit with the water outlet channel, the water outlet valve piece can be in clearance fit with the water outlet channel in the using process. Friction of the water outlet channel to the water outlet valve plate is reduced, and the service life of the water outlet valve plate is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump field especially relates to a water pump assembly and oral irrigator. BACKGROUND

[0002] Water pump is widely used in oral irrigator, floor washing machine, dish washer, children's toys, food and beverage equipment, medical equipment, inflator, landscape fountain, glass cleaning agent, processing machine tool, cooling equipment and other fields, the water pump of related equipment, usually utilize motor drive pump membrane and pump cavity relative movement cooperate valve piece open water inlet passage or water outlet passage to realize pumping and pumping function, the movement of conventional valve piece purely relies on the change of pump cavity pressure to realize the movement of valve piece, the valve piece general part body and the side wall of water outlet passage interference fit, long-term use can cause the abrasion of valve piece and the side wall of water outlet passage, thereby easily appearing water leakage. SUMMARY

[0003] The utility model discloses to solve the technical problem that valve piece and the side wall of water outlet passage are easily abraded, thereby easily appearing water leakage, provide a water pump assembly.

[0004] The utility model provides a water pump assembly, the water pump assembly includes the casing, the pump body for driving the pump body carries out pumping or the driving component of pumping of setting in the casing, the pump body includes the pump shell, with the first end connection of pump membrane end cover of pump shell, with the second end connection of inlet and outlet water sleeve of pump shell, set up between pump membrane end cover and pump shell pump membrane and set up in the state switching assembly of inlet and outlet water sleeve, the pump cavity is provided with in the pump shell, the state switching assembly is used for controlling the pump cavity with the water inlet passage communication or cavity with the water outlet passage communication two states between switching of inlet and outlet water sleeve, the switching assembly includes the water inlet valve piece for opening or plugging the pump cavity with the water inlet passage of setting between the pump shell and inlet and outlet water sleeve and the water outlet valve piece for opening or plugging the water outlet passage of pump cavity through the sliding connection of elastic part with inlet and outlet water sleeve, and the water outlet valve piece and the clearance fit of inlet and outlet water sleeve.

[0005] Further, the water outlet valve piece includes a first valve body and a second valve body connected with the first valve body, a projection of the first valve body towards the second valve body is located in the second valve body, and one end of the elastic member is arranged on the first valve body and abuts against an end surface of the second valve body.

[0006] Further, the first valve body and the second valve body are coaxially arranged cylindrical bodies, and a diameter of the first valve body is smaller than a diameter of the second valve body.

[0007] Or the first valve body is a cylindrical body, and the second valve body is a hemispherical body.

[0008] Further, the water outlet valve is a ball; and the diameter of the elastic member is smaller than the diameter of the water outlet valve.

[0009] Further, the pump membrane is provided with a skirt, the pump shell is provided with a skirt groove at one end connected with the pump membrane end cover, and the pump membrane end cover extrudes and fixes the skirt in the skirt groove.

[0010] Further, the water inlet valve comprises a connecting body arranged between the pump shell and the water inlet and outlet sleeve and an elastic baffle connected with the connecting body and used for opening or blocking the water inlet channel.

[0011] Further, the driving assembly comprises a driving motor arranged in the shell and a plunger connected with one end of the output end of the driving motor and the other end of the pump membrane and used for driving the pump membrane to move towards or away from the pump shell.

[0012] Further, the driving assembly further comprises a connecting gear connected with the output end of the driving motor, a plane gear shaft-connected in the shell and meshed with the gear, an eccentric boss arranged on the plane gear and a connecting rod sleeved on the eccentric boss; one end of the connecting rod away from the eccentric boss is connected with the plunger.

[0013] Further, the pump membrane and the skirt are connected through a connecting arm, the connecting arm comprises a connecting part connected with the skirt and a bent part connected with the pump membrane, and the pump membrane and the inner side wall of the pump shell have a gap therebetween.

[0014] The application further provides a water pick comprising the water pump assembly.

[0015] The utility model discloses the beneficial effects are: the utility model discloses the driving pump membrane is driven by driving assembly and moves to the direction of approaching or away from pump cavity, thereby changes the pressure in pump cavity, and further makes switching assembly open water outlet channel or open water inlet channel, thereby realizes the pumping of water pump or pumping, and water outlet valve piece is through the elastic member and water inlet and outlet sleeve sliding connection, thereby can realize in the pumping state, the further compression of elastic member by water outlet valve piece, and when the water inlet state, the elastic recovery of elastic member can be deformed and the elastic force of the water outlet valve piece is pressed tightly in the pump shell, thereby blocks the water outlet channel, in addition, because water outlet valve piece and the water outlet channel gap cooperation, thereby can reduce the friction of water outlet valve piece to water outlet channel in the use process, and further improves the service life of water outlet valve piece. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the sectional view of the pump body of the water pump of the utility model in the pumping state.

[0017] Figure 2The utility model discloses a water pump's section view when pump water state.

[0018] Figure 3 The utility model discloses a pump body's exploded view.

[0019] Figure 4 The utility model discloses a pump membrane and plunger's connection schematic diagram.

[0020] Figure 5 The utility model discloses a water pump's exploded view. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0022] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model.

[0023] In addition, the terms "first", "second" are only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0024] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, or electrical connection, can be directly connected, or indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.

[0026] The utility model discloses below through specific embodiment combination attached Figures 1-5 Make further detailed description to the utility model.

[0027] Embodiment one:

[0028] The water pump assembly provided in the embodiment comprises a shell 01, a pump body 001 arranged in the shell 01 and a driving assembly for driving the pump body 001 to pump water or draw water, the pump body 001 comprises a pump shell 1, a pump membrane end cover 2 connected with a first end of the pump shell 1, a water inlet and outlet sleeve 3 connected with a second end of the pump shell 1, a pump membrane 4 arranged between the pump membrane end cover 2 and the pump shell 1 and a state switching assembly arranged in the water inlet and outlet sleeve 3, the pump shell 1 is provided with a pump cavity 11, the state switching assembly is used for controlling the pump cavity 11 to communicate with a water inlet channel 31 in the water inlet and outlet sleeve 3 or switch between two states that the pump cavity 11 communicates with a water outlet channel 32 in the water inlet and outlet sleeve 3, the switching assembly comprises a water inlet valve 51 arranged between the pump shell 1 and the water inlet and outlet sleeve 3 and used for opening or blocking the pump cavity 11 and the water inlet channel 31 and a water outlet valve connected with the water inlet and outlet sleeve 3 through an elastic element 53 and used for opening or blocking the water outlet channel 32 of the pump cavity 11, and the water outlet valve is in clearance fit with the water inlet and outlet sleeve 3.

[0029] In the embodiment, the pump membrane 4 is driven by the driving assembly to move in the direction close to or away from the pump cavity 11, so that the pressure in the pump cavity 11 is changed, and then the switching assembly opens the water outlet channel 32 or opens the water inlet channel 31, so that the water pump realizes pumping water or drawing water, the water outlet valve is connected with the water inlet and outlet sleeve 3 through the elastic element 53, so that in the state of pumping water, the elastic element 53 is further compressed by the water outlet valve, and in the state of drawing water, the elastic force of the elastic element 53 recovering deformation can abut the water outlet valve against the pump shell 1, so as to block the water outlet channel 32, in addition, since the water outlet valve is in clearance fit with the water outlet channel 32, the friction of the water outlet valve on the water outlet channel 32 can be reduced in the use process, and then the service life of the water outlet valve is improved, specifically, when drawing water (for example, when the water pump is used as a water pump) Figure 1), the driving assembly drives the pump membrane 4 to move in the direction away from the pump cavity 11, at this time, the volume of the pump cavity 11 becomes large, so that the pressure of the pump cavity 11 becomes small, thereby the water outlet valve piece moves in the direction of the pump cavity 11, thereby the water outlet 34 of the pump cavity 11 and the water outlet channel 32 are blocked, and the water inlet valve piece is away from the water inlet 35 of the pump cavity 11 and the water inlet channel 31, thereby the external water can flow into the pump cavity 11 through the water inlet channel 31 from the water inlet 35, when the pump water state (such as Figure 2 ), the driving assembly drives the pump membrane 4 to move in the direction close to the pump cavity 11, at this time, the volume of the pump cavity 11 becomes small, so that the pressure of the pump cavity 11 becomes large, thereby the water outlet valve piece moves in the direction away from the pump cavity 11, thereby the water outlet 34 of the pump cavity 11 and the water outlet channel 32 are opened, and the water inlet valve piece returns to the position of the water inlet 35 of the pump cavity 11 and the water inlet channel 31, thereby the water inlet 35 is blocked, and the pump water function is realized; in addition, the utility model integrates the water inlet channel and the water outlet channel in the water inlet and outlet sleeve, thereby the miniaturization is realized, and the use scene is improved.

[0030] In the embodiment, when the water outlet valve piece blocks the water outlet 34, at this time, the elastic piece 53 can be elastically deformed, thereby the blocking of the water outlet 34 is improved, and when the water outlet valve piece is unblocked under the pressure, at this time, the elastic piece 53 can be further compressed, thereby in the water inlet state, the elastic force of the elastic piece 53 can push the water outlet valve piece to the position of the water outlet 34, thereby the water outlet 34 is blocked, and in other embodiments, when the water outlet valve piece blocks the water outlet 34, at this time, the elastic piece 53 can not be elastically deformed.

[0031] In the embodiment, the pump shell 1 and the pump membrane end cover 2 can be connected together through bolts, welding, clamping or gluing and the like, and the pump shell 1 and the water inlet and outlet sleeve 3 can be connected together through bolts, welding, clamping or gluing and the like.

[0032] In the embodiment, the pump shell 1 is provided with a positioning piece 14, and the water inlet and outlet sleeve 3 is provided with a positioning portion 33 matched with the positioning piece 14, through the cooperation of the positioning piece 14 and the positioning portion 33, the quick positioning assembly can be realized, and the positioning portion 33 and the positioning piece 14 are provided with corresponding threads, and can be locked through screws.

[0033] The water pump assembly of the embodiment can be used in the oral irrigator, the floor washing machine, the dishwasher, the children's toys, the food and beverage instruments, the medical instruments, the inflating pump, the landscape fountain, the glass cleaning agent, the processing machine tool, the cooling and the like.

[0034] Embodiment two:

[0035] The water outlet valve piece includes a first valve body and a second valve body connected with the first valve body, a projection of the first valve body towards the second valve body is located in the second valve body, one end of the elastic piece 53 is arranged on the first valve body and abuts against an end surface of the second valve body, in the embodiment, by arranging the projection of the first valve body towards the second valve body to be located in the second valve body, that is, the edge of the end surface of the first valve body (the edge of the end surface of the first valve body connected with the second valve body) has a distance from the edge of the end surface of the second valve body (the edge of the end surface of the second valve body connected with the first valve body), so that the connecting positions of the two form a stepped surface, and the elastic piece 53 can stably abut against the stepped surface.

[0036] Further, the first valve body and the second valve body are coaxially arranged as cylindrical bodies, and the diameter of the first valve body is smaller than the diameter of the second valve body.

[0037] Embodiment three:

[0038] The difference between the embodiment and embodiment two is that the first valve body of the embodiment is a cylindrical body, and the second valve body is a hemispherical body, and other structures are the same as those of embodiment two, in the embodiment, the maximum diameter of the second valve body is greater than the inner diameter of the water outlet 34 and smaller than the inner diameter of the water outlet channel 32, by arranging the second valve body as a hemispherical body, the second valve body can be partially located in the water outlet 34 when the water outlet 34 is blocked, thereby further enhancing the blocking of the water outlet 34 and improving the water inlet efficiency.

[0039] Embodiment four:

[0040] Based on the basis of embodiment one, the water outlet valve piece is a spherical body, and the diameter of the elastic piece 53 is smaller than the diameter of the water outlet valve piece, in addition, the diameter of the water outlet valve piece is greater than the inner diameter of the water outlet 34, so that the water outlet valve piece can enhance the blocking of the water outlet 34.

[0041] Embodiment five:

[0042] On the basis of embodiments one to four, the pump membrane 4 is provided with a skirt 41, one end of the pump shell 1 connected with the pump membrane end cover 2 is provided with a skirt 41 groove 12, and the pump membrane end cover 2 extrudes and fixes the skirt 41 in the skirt 41 groove 12, in the embodiment, by extruding and fixing the skirt 41 in the skirt 41 groove 12 by the pump membrane end cover 2, when the driving assembly drives the pump membrane 4 to move to change the volume of the pump cavity 11, the skirt 41 can remain in a static state, and the pump membrane 4 can be arranged not to rub against the inner side wall of the pump shell 1, overcoming the situation that the traditional pump membrane 4 is damaged and leaks due to rubbing against the inner side wall of the pump shell 1.

[0043] Further, the pump membrane 4 is connected with the skirt 41 through a connecting arm, the connecting arm comprises a connecting part 421 connected with the skirt 41 and a bending part 422 connected with the pump membrane 4, and the pump membrane 4 has a gap with the inner side wall of the pump shell 1, so that the pump membrane 4 can be movably connected with the inner side wall of the pump cavity 11 without friction, thereby prolonging the service life of the pump membrane 4.

[0044] Further, the pump membrane end cover 2 has an annular protrusion 21 facing the groove 12 of the skirt 41, and the connecting part of the skirt 41 and the connecting arm is provided with a connecting step 43, and the annular protrusion 21 can be in contact with the connecting step 43 and tightly abut in the groove 12 of the skirt 41.

[0045] Further, the water inlet valve 51 comprises a connecting body 511 arranged between the pump shell 1 and the water inlet and outlet sleeve 3 and an elastic baffle 512 connected with the connecting body 511 for opening or blocking the water inlet channel 31.

[0046] Embodiment six:

[0047] The driving assembly comprises a driving motor 61 arranged in the shell 01 and a plunger 62 connected at one end with the output end of the driving motor 61 and at the other end with the pump membrane 4, for driving the pump membrane 4 to move towards or away from the pump shell 1, specifically, the driving motor 61 drives the plunger 62 to move towards or away from the pump shell 1, so that the pump membrane 4 can move towards or away from the pump shell 1, thereby changing the volume of the pump cavity 11, so that the pressure of the pump cavity 11 changes, realizing the change of the state of pumping water or pumping water.

[0048] Further, the driving assembly further comprises a connecting gear 63 connected with the output end of the driving motor 61, a planar gear 64 shaft-connected in the shell 01 and meshed with the connecting gear 63, an eccentric boss 65 arranged on the planar gear 64, and a connecting rod 66 sleeved on the eccentric boss 65; one end of the connecting rod 66 away from the eccentric boss 65 is connected with the plunger 62, specifically, the driving motor 61 can be driven to rotate to rotate the connecting gear 63, thereby rotating the eccentric boss 65 on the planar gear 64, realizing the movement of the plunger 62 towards or away from the pump cavity 11, in other embodiments, the driving motor 61 can also be arranged as a linear motor, and the forward or backward movement of the pump membrane 4 is realized through the linear motion of the driving motor 61.

[0049] Further, the pump membrane 4 is provided with a clamping groove 45, and the plunger 62 is provided with a clamping protrusion 621 matched with the clamping groove 45, and the clamping of the two realizes the stability of the connection of the two.

[0050] Embodiment seven

[0051] The water pump assembly further comprises a first sealing member 71 arranged between the pump shell 1 and the water inlet and outlet sleeve 3, so as to improve the sealing between the two.

[0052] Further, one of the pump shell 1 and the water inlet and outlet sleeve 3 is provided with a first sealing groove, and the first sealing member 71 is arranged in the first sealing groove in an interference fit, so as to improve the sealing between the two.

[0053] Embodiment eight

[0054] The water pump assembly further comprises a water inlet pipe 8 in communication with the water inlet channel 31, and a second sealing member 72 is arranged between the water inlet pipe 8, so as to improve the sealing between the water inlet channel 31 and the water inlet pipe 8.

[0055] Further, one of the water inlet pipe 8 and the water inlet channel 31 is provided with a second sealing groove, and the second sealing member 72 is arranged in the second sealing groove in an interference fit, so as to improve the sealing between the two.

[0056] Embodiment nine

[0057] The pump membrane 4 provided in the embodiment is provided with a water pushing groove 44 on the end face facing the pump cavity 11. Compared with the mode that the end face of the pump membrane 4 facing the pump cavity 11 is flat, the arrangement of the water pushing groove 44 can reduce the water resistance, thereby reducing the energy consumption of the driving motor 61.

[0058] Embodiment ten

[0059] The utility model further provides a water pick, contains above-mentioned water pump assembly, through above-mentioned water pump assembly, can realize the service life of water outlet valve piece, pump membrane 4 is improved, and then prolongs the service life of water pick, and water inlet channel 31, water outlet channel 32 are integrated in water inlet and outlet sleeve 3, so as to reduce the volume of water pump assembly, reduce the occupation to water pick space.

[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "one example", "some examples", "exemplary", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above is a further detailed description of the utility model in combination with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made.

Claims

1. A water pump assembly characterized by: The water pump assembly comprises a housing, a pump body arranged in the housing, and a driving assembly for driving the pump body to pump water; the pump body comprises a pump shell, a pump membrane end cover connected with a first end of the pump shell, a water inlet / outlet sleeve connected with a second end of the pump shell, a pump membrane arranged between the pump membrane end cover and the pump shell, and a state switching assembly arranged in the water inlet / outlet sleeve; the pump shell is provided with a pump cavity, and the state switching assembly is used for switching between a state in which the pump cavity is communicated with a water inlet channel in the water inlet / outlet sleeve and a state in which the pump cavity is communicated with a water outlet channel in the water inlet / outlet sleeve; the switching assembly comprises a water inlet valve arranged between the pump shell and the water inlet / outlet sleeve and used for opening or blocking the pump cavity and the water inlet channel, and a water outlet valve in slidable connection with the water inlet / outlet sleeve through an elastic member and used for opening or blocking the water outlet channel of the pump cavity, and the water outlet valve is in clearance fit with the water inlet / outlet sleeve.

2. The water pump assembly of claim 1, wherein: The water outlet valve comprises a first valve body and a second valve body connected with the first valve body, a projection of the first valve body towards the second valve body is located in the second valve body, and one end of the elastic member is arranged on the first valve body and abuts against an end face of the second valve body.

3. The water pump assembly of claim 2, wherein: The first valve body and the second valve body are coaxially arranged as cylindrical bodies, and a diameter of the first valve body is smaller than a diameter of the second valve body. Or the first valve body is a cylindrical body, and the second valve body is a hemispherical body.

4. The water pump assembly of claim 1, wherein: The water outlet valve is a spherical body, and a diameter of the elastic member is smaller than a diameter of the water outlet valve.

5. The water pump assembly of any one of claims 1-4, wherein: The pump membrane is provided with a skirt, one end of the pump shell and the pump membrane end cover is provided with a skirt groove, and the pump membrane end cover extrudes and fixes the skirt in the skirt groove.

6. The water pump assembly of any one of claims 1-4, wherein: The water inlet valve comprises a connecting body arranged between the pump shell and the water inlet / outlet sleeve, and an elastic baffle connected with the connecting body and used for opening or blocking the water inlet channel.

7. The water pump assembly of any one of claims 1-4, wherein: The driving assembly comprises a driving motor arranged in the housing, and a plunger connected with one end of the driving motor and the other end of the pump membrane and used for driving the pump membrane to move towards or away from the pump shell.

8. The water pump assembly of claim 7, wherein: The driving assembly further comprises a connecting gear connected with the output end of the driving motor, a plane gear shaft-connected in the housing and in mesh with the connecting gear, an eccentric boss arranged on the plane gear, and a connecting rod sleeved on the eccentric boss; one end of the connecting rod away from the eccentric boss is connected with the plunger.

9. The water pump assembly of claim 5, wherein: The pump membrane and the skirt are connected through a connecting arm, the connecting arm comprises a connecting portion connected with the skirt and a bent portion connected with the pump membrane, and a gap is formed between the pump membrane and an inner side wall of the pump shell.

10. An oral irrigator characterized by: The water pump assembly comprises a housing, a pump body arranged in the housing, and a driving assembly for driving the pump body to pump water; the pump body comprises a pump shell, a pump membrane end cover connected with a first end of the pump shell, a water inlet / outlet sleeve connected with a second end of the pump shell, a pump membrane arranged between the pump membrane end cover and the pump shell, and a state switching assembly arranged in the water inlet / outlet sleeve; the pump shell is provided with a pump cavity, and the state switching assembly is used for switching between a state in which the pump cavity is communicated with a water inlet channel in the water inlet / outlet sleeve and a state in which the pump cavity is communicated with a water outlet channel in the water inlet / outlet sleeve; the switching assembly comprises a water inlet valve arranged between the pump shell and the water inlet / outlet sleeve and used for opening or blocking the pump cavity and the water inlet channel, and a water outlet valve in slidable connection with the water inlet / outlet sleeve through an elastic member and used for opening or blocking the water outlet channel of the pump cavity, and the water outlet valve is in clearance fit with the water inlet / outlet sleeve. The water pump assembly comprises a housing, a pump body arranged in the housing, and a driving assembly for driving the pump body to pump water; the pump body comprises a pump shell, a pump membrane end cover connected with a first end of the pump shell, a water inlet / outlet sleeve connected with a second end of the pump shell, a pump membrane arranged between the pump membrane end cover and the pump shell, and a state switching assembly arranged in the water inlet / outlet sleeve; the pump shell is provided with a pump cavity, and the state switching assembly is used for switching between a state in which the pump cavity is communicated with a water inlet channel in the water inlet / outlet sleeve and a state in which the pump cavity is communicated with a water outlet channel in the water inlet / outlet sleeve; the switching assembly comprises a water inlet valve arranged between the pump shell and the water inlet / outlet sleeve and used for opening or blocking the pump cavity and the water inlet channel, and a water outlet valve in slidable connection with the water inlet / outlet sleeve through an elastic member and used for opening or blocking the water outlet channel of the pump cavity, and the water outlet valve is in clearance fit with the water inlet / outlet sleeve.

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