CN216343039U - Pump body subassembly, water pump and sterilizing machine - Google Patents

Abstract

The utility model discloses a pump body assembly, a water pump and a sterilizing machine, wherein the pump body assembly comprises a pump shell and an impeller, an installation cavity is defined in the pump shell, at least one water inlet and outlet opening and at least one water outlet opening which are communicated with the installation cavity are formed in the pump shell, the impeller is rotatably arranged in the installation cavity, the water inlet and outlet opening is formed in at least one of two sides of the installation cavity in the axial direction of the impeller, and the water inlet and outlet opening is formed in the lower part of the installation cavity and extends downwards to the peripheral wall of the installation cavity. The pump body assembly provided by the utility model is convenient for avoiding the blockage and the locking of the impeller, and has good use reliability.

Description

Pump body subassembly, water pump and sterilizing machine

Technical Field

The utility model relates to the field of fluid conveying, in particular to a pump body assembly, a water pump and a sterilizing machine.

Background

The disinfection machine adopts disinfectant to play a role in sterilizing and disinfecting the environment, and the disinfectant contains substances such as hypochlorous acid, saline water and the like, so that the requirement on the corrosion resistance of the water pump is high. In the related art, salt crystals exist on the wall surface of the mounting cavity of the water pump, and the accumulated salt easily blocks the impeller or blocks the impeller, so that the water pump cannot normally operate.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the pump body assembly which is convenient for avoiding the blockage and the locking of the impeller and has good use reliability.

The utility model also provides a water pump with the pump body assembly.

The utility model also provides a sterilizing machine with the water pump.

According to an embodiment of the first aspect of the utility model, the pump body assembly comprises: the pump shell is internally provided with an installation cavity, a water inlet and outlet and a water outlet which are communicated with the installation cavity are formed in the pump shell, and at least one water inlet and outlet is formed; the impeller, the impeller rotationally locates in the installation cavity, the inlet outlet forms the installation cavity be in at least one side in the ascending both sides of impeller axle, the inlet outlet forms the lower part of installation cavity and downwardly extending to the perisporium of installation cavity.

According to the pump body assembly provided by the embodiment of the utility model, the water inlet and outlet is arranged at the lower part of the mounting cavity, and the water inlet and outlet is extended downwards to the peripheral wall of the mounting cavity, so that liquid in the mounting cavity can have a tendency of flowing towards the water inlet and outlet when the impeller does not rotate on the premise that the water inlet and outlet realizes normal water inlet of the pump body assembly, the liquid residue in the mounting cavity is avoided, the phenomenon that the impeller is easy to block and block due to scale deposition and the like generated after the liquid remained in the mounting cavity is evaporated is reduced, the working efficiency of the pump body assembly is ensured, and the use reliability of the pump body assembly is improved.

In some embodiments, the peripheral wall of the mounting cavity is formed with a flow guide surface extending downwardly to a lower edge of the water inlet and outlet.

In some embodiments, the water inlet and the water outlet are provided with connecting pipes, and the free ends of the connecting pipes extend downwards to the lower part of the pump shell.

In some embodiments, the pump housing further defines a water inlet in communication with the mounting cavity, the water inlet being spaced above the water inlet and outlet.

In some embodiments, the water inlet and outlet and the water inlet are located on the same axial side of the impeller.

In some embodiments, the flow area of the inlet and outlet is equal to the flow area of the inlet.

In some embodiments, a fixed shaft is fixedly arranged in the mounting cavity, a mounting hole is formed in the impeller, the mounting hole is a blind hole, the fixed shaft penetrates through the mounting hole and is in running fit with the impeller, a spherical bulge is formed on one side of the impeller, which faces away from the fixed shaft, a groove is formed in the wall surface of the mounting cavity, the bottom wall of the groove is a curved surface which is concave towards the direction away from the impeller, and the spherical bulge is supported on the bottom wall of the groove.

In some embodiments, the axial both ends face of impeller is first terminal surface and second terminal surface respectively, be formed with at least one on the perisporium of mounting hole and prevent stifled groove, prevent stifled groove along the axial extension of mounting hole just be first lateral wall and second lateral wall respectively for the ascending both sides wall of mounting hole circumference, first lateral wall with at least one in the second lateral wall is formed with first guide surface second terminal surface orientation in the direction of first terminal surface, first guide surface orientation is kept away from prevent that the direction of stifled groove's the central axis extends to run through first terminal surface, prevent stifled groove the central axis with the central axis of mounting hole is parallel.

In some embodiments, the anti-blocking groove extends through the second end face, and the first guide surface extends to the second end face in a direction close to the central axis of the anti-blocking groove.

In some embodiments, the anti-blocking groove penetrates through the second end face, at least one of the first side wall and the second side wall is further formed with a second guide surface, the second guide surface is located on one side of the first guide surface adjacent to the second end face, and the second guide surface extends to the second end face in a direction away from the central axis of the anti-blocking groove in a direction in which the first end face faces the second end face.

In some embodiments, the first end surface is disposed toward the water inlet and outlet, and the first end surface is provided with a plurality of centrifugal blades, and the plurality of centrifugal blades are disposed at intervals along the circumferential direction of the mounting hole.

The water pump according to the embodiment of the second aspect of the present invention includes a driving assembly and the pump body assembly according to the embodiment of the first aspect of the present invention, the driving assembly is disposed outside the installation cavity and includes a driving shaft and a first magnetic member fixedly disposed on the driving shaft, a second magnetic member is embedded in the impeller, and the first magnetic member and the second magnetic member cooperate to drive the impeller to rotate.

According to the water pump provided by the embodiment of the utility model, the pump body assembly is adopted, so that the use reliability of the water pump is improved.

A disinfection machine according to an embodiment of the third aspect of the utility model comprises a water pump according to the embodiment of the second aspect of the utility model described above.

According to the disinfection machine provided by the embodiment of the utility model, the water pump is adopted, so that the use reliability of the disinfection machine is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a pump body assembly according to one embodiment of the present invention;

FIG. 2 is an enlarged view of portion A circled in FIG. 1;

FIG. 3 is a cross-sectional view of the first housing and stationary shaft shown in FIG. 1;

FIG. 4 is a schematic view of the first housing shown in FIG. 3;

FIG. 5 is another schematic view of the first housing and stationary shaft shown in FIG. 3;

FIG. 6 is a cross-sectional view of the first cover shown in FIG. 1;

FIG. 7 is a schematic view of the first cover shown in FIG. 6;

FIG. 8 is a cross-sectional view of a pump body assembly according to another embodiment of the present invention;

FIG. 9 is an enlarged view of portion B encircled in FIG. 8;

FIG. 10 is a schematic view of the first housing shown in FIG. 8;

FIG. 11 is a schematic view of the first housing and stationary shaft shown in FIG. 10;

FIG. 12 is a schematic view of a water pump according to one embodiment of the present invention;

FIG. 13 is a cross-sectional view of the water pump shown in FIG. 12;

FIG. 14 is a schematic view of the impeller shown in FIG. 13;

FIG. 15 is another schematic view of the impeller shown in FIG. 14;

FIG. 16 is an exploded view of the water pump shown in FIG. 13;

FIG. 17 is a schematic view of a water pump according to another embodiment of the utility model;

FIG. 18 is a cross-sectional view of the water pump shown in FIG. 17;

FIG. 19 is a schematic view of an impeller according to yet another embodiment of the present invention;

FIG. 20 is an enlarged view of the portion C encircled in FIG. 19;

fig. 21 is a partial cross-sectional view of the impeller and pump casing shown in fig. 19, with arrows indicating the direction of discharge of foreign matter between the stationary shaft and the mounting hole;

FIG. 22 is a cross-sectional view of the impeller shown in FIG. 19;

FIG. 23 is an enlarged view of the circled portion D of FIG. 22;

FIG. 24 is a partial cross-sectional view of an impeller according to yet another embodiment of the present invention;

FIG. 25 is a partial cross-sectional view of an impeller according to yet another embodiment of the present invention;

FIG. 26 is a partial cross-sectional view of an impeller according to yet another embodiment of the present invention;

fig. 27 is a partial cross-sectional view of an impeller according to yet another embodiment of the present invention.

Reference numerals:

a water pump 100,

A pump body component 1,

A pump shell 11, an impeller 12, a connecting pipe 13, a fixed shaft 14, a second magnetic part 15,

An installation cavity 110, a water inlet and outlet 110a, a water outlet 110b, a water inlet 110c,

A flow guide surface 110d, a groove 110e, a first shell 111, a first cover 112,

A matching groove 111a, a clamping groove 111b, a buckle 112a, a clamping bulge 112b,

A first end face R1, a second end face R2, a spherical bulge 121, a centrifugal blade 122,

Mounting hole 120, central axis 120a of the mounting hole, anti-clogging groove 120b, central axis 120c of the anti-clogging groove,

A first side wall S1, a second side wall S2, a third side wall S3, a first guide surface A1,

A first intersecting line L1, a second intersecting line L2,

A driving component 2, a sealing cover 20,

Drive shaft 21, first magnetic member 22, bracket 23, second housing 24, main body 241, connecting case 242,

Second cover 25, motor 26, stator 261, rotor 262, first bearing 27, second bearing 28,

Fixed cover 291, wave pad 292.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

Next, a pump body assembly 1 according to an embodiment of the first aspect of the present invention is described with reference to the drawings.

As shown in fig. 1, 3 and 8, the pump body assembly 1 includes a pump housing 11 and an impeller 12, a mounting cavity 110 is defined in the pump housing 11, a water inlet and outlet 110a and a water outlet 110b which are communicated with the mounting cavity 110 are formed in the pump housing 11, the impeller 12 is rotatably disposed in the mounting cavity 110, when the impeller 12 rotates, a negative pressure is generated at the water inlet and outlet 110a, and liquid (such as water and the like) flows into the mounting cavity 110 through the water inlet and outlet 110a and is discharged out of the mounting cavity 110 through the water outlet 110b under the driving action of the impeller 12, so as to realize the transportation or pressurization of the liquid.

The number of the water inlet and outlet ports 110a is at least one, the water inlet and outlet ports 110a are formed on at least one of two sides of the installation cavity 110 in the axial direction of the impeller 12, so that liquid can conveniently flow into the installation cavity 110 through the water inlet and outlet ports 110a, and the design of the water inlet and outlet ports 110a conforms to the flow channel principle of the pump body assembly 1 so as to ensure normal water inlet of the pump body assembly 1; the following scheme may be included: 1. the inlet/outlet port 110a may be formed at one of both sides of the mounting chamber 110 in the axial direction of the impeller 12, in which case one or more inlet/outlet ports 110 a; 2. the mounting cavity 110 is formed with a plurality of water inlet and outlet ports 110a on both sides in the axial direction of the impeller 12.

Wherein the water inlet and outlet port 110a is formed at the lower portion of the installation cavity 110, and the water inlet and outlet port 110a extends downward to the peripheral wall of the installation cavity 110, so that the peripheral wall of the installation chamber 110 participates in defining the lower edge of the water inlet and outlet port 110a, so that when the impeller 12 is not rotated, the liquid in the mounting chamber 110 has a tendency to flow toward the inlet/outlet port 110a by its own weight, if the liquid level is low, for example, the liquid level is lower than the lowest end of the peripheral wall of the installation cavity 110, the liquid in the installation cavity 110 can flow out of the installation cavity 110 through the water inlet and outlet 110a under the action of its own weight, which is beneficial to avoiding the liquid remaining on the bottom wall of the installation cavity 110, therefore, the situation that the impeller 12 is easily blocked and stuck due to the fact that accumulated scale and the like are generated after liquid remained in the installation cavity 110 is evaporated is reduced, the working efficiency of the pump body assembly 1 is guaranteed, and the pump body assembly 1 can normally and reliably run.

It can be seen that the water inlet and outlet 110a can have both "water inlet" and "water outlet" functions, that is, when the pump body assembly 1 operates, the impeller 12 rotates, and at this time, the water inlet and outlet 110a has a "water inlet" function, and liquid flows into the mounting cavity 110 through the water inlet and outlet 110 a; when the pump body assembly 1 stops operating, the impeller 12 does not rotate, at this time, the water inlet and outlet 110a has a "water discharge" function, and when the liquid level is low, the liquid in the installation cavity 110 can be discharged out of the installation cavity 110 through the water inlet and outlet 110a, so that the liquid residue in the installation cavity 110 is avoided.

Obviously, the pump body assembly 1 is used for conveying the liquid that contains hypochlorous acid, salt solution or other easily produce crystallization, for example, the sterile water, pump body assembly 1 out of service period, remain a small amount of liquid evaporation in installation cavity 110 and easily produce the salt at the installation cavity 110 wall and lead to impeller 12 to block up, the card is dead, this application is through establishing inlet outlet 110a in the lower part of installation cavity 110 and inlet outlet 110a downwardly extending to the perisporium of installation cavity 110, under the prerequisite of guaranteeing that pump body assembly 1 normally intakes, be convenient for avoid the installation cavity 110 in the liquid remain, reduce installation cavity 110 and avoid the salt deposit to block up impeller 12, or the dead condition of impeller 12 card takes place.

In addition, for in some technologies, the water inlet of pump body subassembly only establishes in the middle part of installation cavity and with the coaxial setting of impeller, because intake outlet 110a is located the lower part of installation cavity 110 in this application, can make pump body subassembly 1 also can normal operating when the liquid level is lower, that is to say, also can guarantee intake outlet 110a and submerge below the liquid level when the liquid level is lower, reduce the requirement of pump body subassembly 1 to the liquid level, the minimum liquid level that pump body subassembly 1 can operate has been reduced, be favorable to promoting pump body subassembly 1's suitability.

According to the pump body assembly 1 of the embodiment of the utility model, the water inlet and outlet 110a is arranged at the lower part of the mounting cavity 110, and the water inlet and outlet 110a is extended downwards to the peripheral wall of the mounting cavity 110, so that on the premise that the water inlet and outlet 110a realizes normal water inlet of the pump body assembly 1, when the impeller 12 does not rotate, liquid in the mounting cavity 110 can have a tendency of flowing towards the water inlet and outlet 110a, so that the liquid in the mounting cavity 110 is prevented from remaining, the occurrence of the situation that the impeller 12 is easily blocked and jammed due to scale deposition (such as salt deposition) generated after the liquid remaining in the mounting cavity 110 is evaporated is reduced, the working efficiency of the pump body assembly 1 is ensured, and the use reliability of the pump body assembly 1 is improved.

It is understood that the cross-sectional shape of the inlet/outlet port 110a is not particularly limited, and for example, the cross-sectional shape of the inlet/outlet port 110a may be circular, or elliptical, or polygonal, etc.

In some embodiments, as shown in fig. 1, 2, 8 and 9, the peripheral wall of the mounting cavity 110 is formed with a flow guiding surface 110d, and the flow guiding surface 110d extends downward to the lower edge of the water inlet and outlet 110a, when the impeller 12 does not rotate, if the liquid level is low, the flow guiding surface 110d can quickly guide the liquid in the mounting cavity 110 to the water inlet and outlet 110a, thereby further effectively avoiding the liquid residue in the mounting cavity 110; thereby when pump body subassembly 1 is used for carrying liquid such as disinfection water, salt solution, further avoided liquid to remain and produce long-pending salt, scaling etc. and lead to impeller 12 to easily block up, block up after the installation cavity 110 wall evaporates, and then guaranteed pump body subassembly 1's conveying efficiency for pump body subassembly 1 normal reliable operation.

It is understood that the circumferential wall of the mounting cavity 110 is formed with a flow guide surface 110d, the length of the flow guide surface 110d in the axial direction of the mounting cavity 110 may be less than or equal to the axial length of the mounting cavity 110, and the length of the flow guide surface 110d in the circumferential direction of the mounting cavity 110 may be less than the circumferential length of the mounting cavity 110. Optionally, the deflector surface 110d is formed as a plane or a curved surface.

In some embodiments, as shown in fig. 1 and 8, the water inlet and outlet 110a is provided with a connecting pipe 13, a free end of the connecting pipe 13 extends downward to a position below the pump housing 11, an upper end of the connecting pipe 13 is connected to the pump housing 11, and the free end of the connecting pipe 13 is located below the pump housing 11 in the up-down direction, so that the arrangement of the connecting pipe 13 further facilitates smooth discharge of the liquid in the installation cavity 110, and even if the pump body assembly 1 is used, the connecting pipe 13 is additionally provided with a pipeline, and the provided pipeline does not affect the discharge of the liquid in the installation cavity 110; meanwhile, the water inlet position of the pump body assembly 1 can be further moved downwards by the connecting pipe 13, so that the lowest liquid level of the pump body assembly 1 which can run is further reduced, the requirement of the pump body assembly 1 on the liquid level is further reduced, and the practicability and the applicability of the pump body assembly 1 are improved.

It is understood that the connection pipe 13 may extend downward from the inlet/outlet port 110a along a straight line or a curved line (as shown in fig. 1 and 8).

Alternatively, the connection pipe 13 is integrally formed with the pump case 11. Of course, the connecting tube 13 can also be connected to the pump housing 11 by a fixed connection, for example, the connecting tube 13 is welded to the pump housing 11.

In some embodiments, as shown in fig. 1, 3 and 5, the pump housing 11 further forms a water inlet 110c communicating with the mounting cavity 110, the water inlet 110c is spaced above the water inlet and outlet 110a, the water inlet 110c may be located at one side of the mounting cavity 110 in the axial direction of the impeller 12, and when the impeller 12 rotates, a negative pressure is generated at the water inlet 110c, and the liquid flows into the mounting cavity 110 through the water inlet 110 c. Therefore, when the impeller 12 rotates, liquid can flow into the installation cavity 110 through the water inlet and outlet 110a and the water inlet 110c respectively, so that the water inlet area of the pump body assembly 1 is increased, the performance of the pump body assembly 1 is improved, and the conveying efficiency of the pump body assembly 1 is improved; moreover, even if one of the water inlet and outlet 110a and the water inlet 110c is blocked to cause abnormal water inlet, the other water inlet and outlet can still ensure normal water inlet of the pump body assembly 1, so that a redundant water inlet design of the pump body assembly 1 can be realized, and normal operation of the pump body assembly 1 can be ensured, for example, when the liquid level is at a position between the water inlet 110c and the water inlet and outlet 110a in the vertical direction, namely the water inlet 110c is positioned above the liquid level and the water inlet and outlet 110a is positioned below the liquid level, at this time, the water inlet 110c cannot normally feed water, and the water inlet and outlet 110a can still normally feed water.

It is understood that the cross-sectional shape of the water inlet 110c is not particularly limited, for example, the cross-sectional shape of the water inlet 110c may be circular, or elliptical, or polygonal, etc., and the cross-sectional shape of the water inlet 110c and the cross-sectional shape of the water inlet and outlet 110a may be the same or different.

In some embodiments, as shown in fig. 1 and 3, the water inlet and outlet 110a and the water inlet 110c are located on the same axial side of the impeller 12, and when the pump body assembly 1 is in use, pipes need to be connected to the water inlet and outlet 110a and the water inlet 110c, so that the pipe at the water inlet and outlet 110a and the pipe at the water inlet 110c can be located on the same axial side of the pump housing 11, which is beneficial to saving the axial occupied space of the pump body assembly 1.

Alternatively, in the example of fig. 1, the flow area of the inlet/outlet 110a is equal to the flow area of the inlet 110c, and the flow area of the inlet/outlet 110a is absolutely equal to the flow area of the inlet 110c, or the flow area of the inlet/outlet 110a is substantially equal to the flow area of the inlet 110c, but is not substantially different from the flow area of the inlet 110 c; for example, when the cross-sectional shape of the inlet/outlet port 110a and the cross-sectional shape of the inlet port 110c are both circular, the diameter of the inlet/outlet port 110a is equal to the diameter of the inlet port 110 c.

Of course, in other embodiments of the present application, the pump housing 11 may not have the water inlet 110c (as shown in fig. 8 and 10), and the pump body assembly 1 may only realize water inlet through the water inlet and outlet 110 a.

In some embodiments, as shown in fig. 1 and 8, the fixing shaft 14 is fixedly disposed in the mounting cavity 110, the impeller 12 is formed with a mounting hole 120, the mounting hole 120 is a blind hole, the fixing shaft 14 is disposed through the mounting hole 120, and the fixing shaft 14 is rotationally engaged with the impeller 12, so that the impeller 12 can rotate relative to the fixing shaft 14; one side of the impeller 12, which faces away from the fixed shaft 14, is formed with a spherical protrusion 121, a wall surface of the mounting cavity 110 is formed with a groove 110e, a bottom wall of the groove 110e is a curved surface (such as a spherical surface, an elliptical surface, an arc surface, and the like) which is recessed towards a direction away from the impeller 12, the spherical protrusion 121 is supported on the bottom wall of the groove 110e, so that the spherical protrusion 121 and the groove 110e are in point contact, stable support of the impeller 12 is realized, stable rotation of the impeller 12 is favorably ensured, and rotation resistance of the impeller 12 is reduced.

Here, the bottom wall of the groove 110e may be understood as a wall surface of one side of the groove 110e opposite to the open side of the groove 110 e.

In some embodiments, as shown in fig. 19 to 21, the first end face R1 and the second end face R2 are respectively provided at both axial end faces of the impeller 12, the circumferential wall of the mounting hole 120 is formed with at least one anti-blocking groove 120b, the anti-blocking groove 120b extends in the axial direction of the mounting hole 120, and both side walls of the anti-blocking groove 120b in the circumferential direction of the mounting hole 120 are the first side wall S1 and the second side wall S2 respectively.

At least one of the first side wall S1 and the second side wall S2 is formed with a first guide surface a1, the first guide surface a1 extends to penetrate the first end surface R1 in a direction of the second end surface R2 toward the first end surface R1 in a direction away from the central axis 120c of the anti-blocking groove 120b, the central axis 120c of the anti-blocking groove 120b is parallel to the central axis 120a of the mounting hole 120, and the first guide surface a1 extends toward the radial outside of the anti-blocking groove 120b in a direction of the second end surface R2 toward the first end surface R1. It is understood that the first guide surface a1 extends to the first end surface R1, which indicates that the anti-blocking groove 120b extends through the first end surface R1.

In the present application, the arrangement of the first guide surface a1 may include the following solutions:

1. as shown in fig. 24 and 26, the first side wall S1 is formed with a first guide surface a1, the anti-clogging groove 120b penetrates the first end surface R1, the first guide surface a1 extends toward a direction away from the central axis 120c of the anti-clogging groove 120b to the first end surface R1 in a direction in which the second end surface R2 faces the first end surface R1, and when foreign matters exist between the outer peripheral wall of the fixed shaft 14 and the peripheral wall of the mounting hole 120, the foreign matters can be gradually gathered to the anti-clogging groove 120b, the first guide surface a1 can apply a force parallel to the normal direction of the first guide surface a1 to the foreign matters due to the rotation of the impeller 12, the force having a first component force perpendicular to the axial direction of the mounting hole 120 and a second component force parallel to the axial direction of the mounting hole 120, and the foreign matters are moved toward the first end surface R1 by the second component force, so that the foreign matters between the mounting hole 14 and the mounting hole 120 can be discharged through the anti-clogging groove 120R 1 corresponding to the first end surface R1 by the first guide surface a1, the impeller 12 is prevented from being blocked, stuck and the like due to foreign matters, the working efficiency of the pump body assembly 1 is further effectively ensured, and the pump body assembly 1 can normally and reliably run.

It can be understood that, in the above-mentioned solution 1, since the first side wall S1 is formed with the first guide surface a1, the impeller 12 rotates in the direction from the first side wall S1 to the second side wall S2 (clockwise direction as viewed from the first end surface R1 in fig. 24 and 26) in the circumferential direction of the mounting hole 120, so as to ensure the anti-blocking performance of the first guide surface a 1.

2. As shown in fig. 25 and 27, the second side wall S2 is formed with a first guide surface a1, the anti-blocking groove 120b penetrates through the first end surface R1, and the first guide surface a1 extends to the first end surface R1 in a direction away from the central axis 120c of the anti-blocking groove 120b in a direction in which the second end surface R2 faces the first end surface R1, so that when foreign matter exists between the outer peripheral wall of the fixed shaft 14 and the peripheral wall of the mounting hole 120, the foreign matter can gradually gather in the anti-blocking groove 120b, and due to the rotation of the impeller 12, the first guide surface a1 can apply a force parallel to the normal direction of the first guide surface a1 to the foreign matter, so that the foreign matter between the fixed shaft 14 and the mounting hole 120 can be discharged through the end of the anti-blocking groove 120b corresponding to the first end surface R1 by the first guide surface a1, thereby preventing the foreign matter from causing the impeller 12 to be blocked, stuck, and the like.

It can be understood that, in the above-described aspect 2, since the second side wall S2 is formed with the first guide surface a1, the impeller 12 rotates in the direction from the second side wall S2 to the first side wall S1 (counterclockwise as viewed from the first end surface R1 in fig. 25 and 27) in the circumferential direction of the mounting hole 120 to ensure the anti-clogging performance of the first guide surface a 1.

3. As shown in fig. 20, 22 and 23, the first side wall S1 and the second side wall S2 are respectively formed with a first guide surface a1, the anti-blocking groove 120b penetrates the first end surface R1, the first guide surface a1 extends to the first end surface R1 in a direction away from the central axis 120c of the anti-blocking groove 120b in a direction toward the first end surface R1 of the second end surface R2, the first guide surface a1 of the first side wall S1 and the first guide surface a1 of the second side wall S2 extend to the first end surface R1 in a direction away from each other in a direction toward the first end surface R1 of the second end surface R2, and when there is a foreign object between the fixed shaft 14 and the mounting hole 120, the foreign object can be discharged through an end of the anti-blocking groove 120b corresponding to the first end surface R1 by the first guide surface a1, thereby preventing the impeller 12 from being blocked, stuck and the like.

It is understood that, in the above-mentioned solution 3, since the first side wall S1 and the second side wall S2 are respectively formed with the first guide surface a1, the rotation direction of the impeller 12 is not particularly limited, for example, in the circumferential direction of the mounting hole 120, the impeller 12 can rotate in the direction from the first side wall S1 to the second side wall S2, when the first guide surface a1 of the first side wall S1 pushes the foreign matter (in the solid arrow direction in fig. 23) between the fixed shaft 14 and the mounting hole 120 to be discharged, the impeller 12 can also rotate in the direction from the second side wall S2 to the first side wall S1, when the first guide surface a1 of the second side wall S2 pushes the foreign matter (in the hollow arrow direction in fig. 23) between the fixed shaft 14 and the mounting hole 120 to be discharged.

In the above embodiment 1, how the second side wall S2 is disposed is not particularly limited, for example, in the direction in which the second end surface R2 faces the first end surface R1, the second side wall S2 extends to the first end surface R1 in the direction parallel to the central axis 120c of the anti-blocking groove 120b (as shown in fig. 24), or extends to the first end surface R1 in the direction substantially coincident with the extending direction of the first guide surface a1 (as shown in fig. 26), or extends to the first end surface R1 in the direction away from the central axis 120c of the anti-blocking groove 120b (as shown in fig. 23); in contrast to the above embodiment 2, how the first side wall S1 is disposed is not particularly limited, and for example, in the direction in which the second end surface R2 faces the first end surface R1, the first side wall S1 extends to the first end surface R1 in the direction parallel to the central axis 120c of the anti-blocking groove 120b (as shown in fig. 25), or extends to the first end surface R1 in the direction substantially coincident with the extending direction of the first guide surface a1 (as shown in fig. 27), or extends to the first end surface R1 in the direction away from the central axis 120c of the anti-blocking groove 120b (as shown in fig. 23).

It should be noted that, in the above solution 1, if the extending direction of the second side wall S2 is substantially consistent with the extending direction of the first guide surface a1, it can be shown that the whole anti-blocking groove 120b is obliquely arranged relative to the axial direction of the mounting hole 120, at this time, the second side wall S2 may be parallel or not parallel to the first guide surface a1, and the cross-sectional area of the anti-blocking groove 120b may be always constant or may be changed along the axial direction of the mounting hole 120; also, in the above embodiment 2, if the extending direction of the first side wall S1 is substantially the same as the extending direction of the first guide surface a1, it can be said that the entire anti-blocking groove 120b is obliquely arranged with respect to the axial direction of the mounting hole 120, and at this time, the first side wall S1 and the first guide surface a1 may be parallel or non-parallel, and the cross-sectional area of the anti-blocking groove 120b may be always constant or may be changed along the axial direction of the mounting hole 120.

Obviously, the pump body assembly 1 is used for conveying liquid containing hypochlorous acid, saline water or other liquid which is easy to generate crystallization, such as disinfectant water, during operation of the pump body assembly 1, salt deposition is easy to generate between the fixed shaft 14 and the mounting hole 120 to cause blockage and blocking of the impeller 12, in the present application, the anti-blocking groove 120b is arranged to increase the accommodating space between the mounting hole 120 and the fixed shaft 14 to a certain extent so as to accommodate more salt deposition, which is beneficial to prolonging the deposition time of the salt deposition to block the impeller 12, and the first guide surface a1 is formed on at least one of the first side wall S1 and the second side wall S2, so that the first guide surface a1 pushes the salt deposition between the fixed shaft 14 and the mounting hole 120 to discharge along with the rotation of the impeller 12, so as to further reduce the occurrence of the phenomenon that the salt deposition blocks the impeller 12 or blocks the impeller 12.

It is understood that the side of the impeller 12 facing the water inlet and outlet port 110a is the first end R1, the side facing away from the water inlet and outlet port 110a is the second end R2, or the side of the impeller 12 facing the water inlet and outlet port 110a is the second end R2, and the side facing away from the water inlet and outlet port 110a is the first end R1. Likewise, the mounting hole 120 may extend through the first end face R1 without extending through the second end face R2, or the mounting hole 120 may extend through the second end face R2 without extending through the first end face R1.

For example, in the example of fig. 1 and 8, the end surface of the impeller 12 on the side facing the water inlet and outlet port 110a is the first end surface R1, and the mounting hole 120 penetrates the first end surface R1.

Optionally, in the example of fig. 20, the first guide surface a1 is planar in order to simplify the machining of the first guide surface a 1.

Of course, the first guide surface a1 may also be formed as a curved surface, and the anti-blocking performance of the first guide surface a1 may also be achieved; when the first guide surface a1 is a curved surface, the first guide surface a1 may be formed as a curved surface that is convex toward the central axis 120c of the anti-clogging groove 120b, or as a curved surface that is concave toward the central axis 120c of the anti-clogging groove 120 b.

In some embodiments, the fixed shaft 14 and the mounting hole 120 are in a clearance fit, for example, the fit clearance between the fixed shaft 14 and the mounting hole 120 is 0.02mm to 0.03 mm. Optionally, the impeller 12 includes a shaft sleeve defining the mounting hole 120, and the fixing shaft 14 is disposed through the shaft sleeve, wherein the shaft sleeve and the fixing shaft 14 are both made of ceramic, which is beneficial to improving the wear resistance and corrosion resistance of the impeller 12 and the fixing shaft 14, and is not beneficial to crystallization.

In some embodiments, the anti-blocking groove 120b extends through the second end surface R2, the anti-blocking groove 120b extends as a through hole along the axial direction of the mounting hole 120, and the first guide surface a1 also extends through the second end surface R2. The first guide surface a1 extends to the second end surface R2 toward the direction close to the central axis 120c of the anti-blocking groove 120b, so that the extending trend of the whole first guide surface a1 in the axial direction of the mounting hole 120 can be kept unchanged, and the processing of the first guide surface a1 is facilitated.

Of course, the present application is not so limited; in other embodiments of the present application, the anti-blocking groove 120b may also extend as a blind hole along the axial direction of the mounting hole 120, and at this time, the anti-blocking groove 120b may only penetrate through the first end face R1 and not penetrate through the second end face R2, and then the first guide surface a1 does not penetrate through the second end face R2.

In some embodiments, the anti-blocking groove 120b extends through the second end surface R2, and the anti-blocking groove 120b extends as a through hole along the axial direction of the mounting hole 120. Wherein, the at least one of the first side wall S1 and the second side wall S2 is further formed with a second guiding surface, the second guiding surface is located at a side of the first guiding surface a1 adjacent to the second end surface R2, and in a direction of the first end surface R1 toward the second end surface R2, the second guiding surface extends to the second end surface R2 toward a direction away from the central axis 120c of the anti-blocking groove 120b, so that during the rotation of the impeller 12, the second guiding surface can discharge the foreign matters passing between the fixed shaft 14 and the mounting hole 120 through the end of the anti-blocking groove 120b corresponding to the second end surface R2, which is beneficial to improving the efficiency of discharging the foreign matters of the anti-blocking groove 120b, and further avoiding the impeller 12 from being blocked and jammed.

The arrangement of the second guide surface in this application may include the following:

first, the first side wall S1 is formed with a first guide surface a1 and a second guide surface, the anti-clogging groove 120b is a through hole, in the direction of the second end surface R2 toward the first end surface R1, the first guide surface a1 extends to the first end surface R1 toward the direction away from the central axis 120c of the anti-clogging groove 120b, and the second guide surface extends to be directly or indirectly connected to the first guide surface a1 toward the direction close to the central axis 120c of the anti-clogging groove 120b, when there is a foreign object between the outer peripheral wall of the fixed shaft 14 and the peripheral wall of the mounting hole 120, due to the rotation of the impeller 12, the second guide surface can apply a force parallel to the normal direction of the second guide surface to the foreign object, the force has a third component force perpendicular to the axial direction of the mounting hole 120 and a fourth component force parallel to the axial direction of the mounting hole 120, and the fourth component force moves the foreign object toward the second end surface R2, therefore, the foreign matter between the fixed shaft 14 and the mounting hole 120 is discharged through the end of the anti-blocking groove 120b corresponding to the second end face R2 under the action of the second guide surface, so that the blockage, the locking and the like of the impeller 12 caused by the foreign matter are avoided, the working efficiency of the pump body assembly 1 is effectively ensured, and the pump body assembly 1 can normally and reliably operate.

It can be understood that, in the first solution, since the first side wall S1 is formed with the first guide surface a1 and the second guide surface, the impeller 12 rotates in the direction from the first side wall S1 to the second side wall S2 in the circumferential direction of the mounting hole 120, so as to ensure the anti-blocking performance of the first guide surface a1 and the second guide surface.

The second side wall S2 is formed with a first guide surface a1 and a second guide surface, the anti-blocking groove 120b is a through hole, in the direction of the second end surface R2 toward the first end surface R1, the first guide surface a1 extends to the first end surface R1 toward the direction away from the central axis 120c of the anti-blocking groove 120b, and the second guide surface extends to be directly or indirectly connected with the first guide surface a1 toward the direction close to the central axis 120c of the anti-blocking groove 120b, so when there is a foreign object between the peripheral wall of the fixed shaft 14 and the peripheral wall of the mounting hole 120, due to the rotation of the impeller 12, the second guide surface can discharge the foreign object between the fixed shaft 14 and the mounting hole 120 through the end of the anti-blocking groove 120b corresponding to the second end surface R2.

It can be understood that, in the second solution, since the second side wall S2 is formed with the first guide surface a1 and the second guide surface, the impeller 12 rotates in the direction from the second side wall S2 to the first side wall S1 in the circumferential direction of the mounting hole 120 to ensure the anti-blocking performance of the first guide surface a1 and the second guide surface.

Third, the first side wall S1 and the second side wall S2 are each formed with a first guide surface a1 and a second guide surface, the anti-clogging groove 120b is a through hole, the first guide surface a1 extends to the first end surface R1 in a direction away from the central axis 120c of the anti-clogging groove 120b and the second guide surface extends to be directly or indirectly connected to the first guide surface a1 in a direction toward the central axis 120c of the anti-clogging groove 120b in a direction toward the first end surface R2 in the direction of the second end surface R2, the first guide surface a1 of the first side wall S1 and the first guide surface a 38 of the second side wall S2 extend to the first end surface R1 in a direction away from each other and the second guide surface of the first side wall S1 and the second guide surface of the second side wall S2 extend in a direction toward each other in a direction toward the first end surface R1, and when there is a second guide surface a guide and a second guide surface act on the fixing shaft 120, the foreign object can be discharged by the foreign object when the first guide surface a and the fixing shaft 120, avoiding jamming, etc. of the impeller 12.

It is understood that, in the third solution, since the first side wall S1 and the second side wall S2 are both formed with the first guide surface a1 and the second guide surface, there is no particular limitation on the rotation direction of the impeller 12, for example, in the circumferential direction of the mounting hole 120, the impeller 12 may rotate in the direction from the first side wall S1 to the second side wall S2, when the first guide surface a1 and the second guide surface of the first side wall S1 push the foreign objects between the fixed shaft 14 and the mounting hole 120 to be discharged, and the impeller 12 may also rotate in the direction from the second side wall S2 to the first side wall S1, when the first guide surface a1 and the second guide surface of the second side wall S2 push the foreign objects between the fixed shaft 14 and the mounting hole 120 to be discharged.

In the first solution regarding the arrangement of the second guide surface, how to arrange the second side wall S2 is not particularly limited, and can be flexibly designed according to actual requirements; in contrast to the second solution regarding the arrangement of the second guide surface, how to arrange the first side wall S1 is not particularly limited, and can be flexibly designed according to actual requirements.

Optionally, the second guide surface is planar in order to simplify the machining of the first guide surface a 1.

Of course, the second guide surface can also be formed into a curved surface, and the anti-blocking performance of the second guide surface can also be realized; when the second guide surface is a curved surface, the second guide surface may be formed as a curved surface that is convex toward the central axis 120c of the anti-clogging groove 120b or as a curved surface that is concave toward the central axis 120c of the anti-clogging groove 120 b.

Alternatively, when the anti-blocking groove 120b is a through hole and at least one of the first and second side walls S1 and S2 is formed with the first and second guide surfaces a1 and S3526, the spherical protrusion 121 is supported at the bottom wall of the groove 110e to form a discharge gap between the impeller 12 and a side wall surface of the mounting chamber 110 having the groove 110e, so that foreign substances discharged from one end of the anti-blocking groove 120b toward the groove 110e are smoothly discharged through the discharge gap.

In some embodiments, as shown in fig. 20, the anti-blocking groove 120b is provided in plurality, and the plurality of anti-blocking grooves 120b are provided at intervals in the circumferential direction of the installation hole 120. The number of the anti-blocking grooves 120b is odd, for example, the number of the anti-blocking grooves 120b is three, five, seven, or the like, so that for each anti-blocking groove 120b, there is no anti-blocking groove 120b opposite to the anti-blocking groove in the radial direction, and thus resonance is difficult to generate in the rotation process of the impeller 12, which is beneficial to lower noise and overall shaking of the impeller 12, and the requirements for the machining accuracy and the like of the anti-blocking grooves 120b are low, which is beneficial to reducing the cost.

It can be understood that, when there are a plurality of anti-blocking grooves 120b, each anti-blocking groove 120b can discharge the foreign matter between the fixed shaft 14 and the mounting hole 120, which is beneficial to improving the cleaning efficiency of the foreign matter and ensuring the stable rotation of the impeller 12. In the description of the present application, "a plurality" means two or more.

Alternatively, a plurality of anti-clogging grooves 120b may be provided at regular intervals in the circumferential direction of the mounting hole 120, so that each anti-clogging groove 120b does not have an anti-clogging groove 120b radially opposed thereto, and noise and overall shaking of the impeller 12 can be reduced.

Of course, the number of the anti-blocking grooves 120b may be even.

In some embodiments, as shown in fig. 19 to 21, the first end face R1 is disposed toward the water inlet and outlet 110a, the first end face R1 is provided with a plurality of centrifugal blades 122, and the plurality of centrifugal blades 122 are disposed at intervals along the circumferential direction of the mounting hole 120, so that when the impeller 12 rotates, the plurality of centrifugal blades 122 rotate along with the impeller 12 to generate radially outward static pressure, which facilitates smooth discharge of foreign matters between the fixed shaft 14 and the mounting hole 120 toward the first end face R1, and simultaneously prevents water flowing from the water inlet and outlet 110a into the mounting cavity 110 from blocking one end of the anti-blocking groove 120b corresponding to the first end face R1, which may result in the discharge of the foreign matters.

It is understood that, when the pump housing 11 is formed with the water inlet 110c, if the water inlet and outlet 110a and the water inlet 110c are located on the same axial side of the impeller 12, the first end surface R1 is disposed toward the water inlet and outlet 110a and the water inlet 110c, and the first end surface R1 is provided with a plurality of centrifugal blades 122 spaced circumferentially of the mounting hole 120 to prevent the water flowing from the water inlet and outlet 110a and the water inlet 110c into the mounting cavity 110 from blocking the anti-blocking groove 120 b; if the water inlet and outlet 110a and the water inlet 110c are located on the same axial side of the impeller 12, and the first end surface R1 is disposed opposite to the water inlet and outlet 110a and the water inlet 110c, the centrifugal blade 122 does not need to be disposed on the first end surface R1, or the centrifugal blade 122 may be disposed on the first end surface R1; if the water inlet and outlet 110a and the water inlet 110c are located at two axial sides of the impeller 12, the first end surface R1 may be disposed toward the water inlet 110c, and at this time, a plurality of centrifugal blades 122 may be disposed on the first end surface R1 at intervals along the circumferential direction of the mounting hole 120.

Alternatively, in the example of fig. 1, the water inlet 110c may be arranged coaxially with the impeller 12, i.e. the central axis of the water inlet 110c coincides with the central axis of the impeller 12. Of course, the water inlet 110c may also be radially offset from the impeller 12 such that the central axis of the water inlet 110c is spaced from the central axis of the impeller 12.

In some embodiments, when the anti-blocking groove 120b is a through hole and at least one of the first and second side walls S1 and S2 is formed with the first and second guide surfaces a1 and S3526, the first and second end surfaces R1 and R2 may be respectively provided with a plurality of centrifugal blades 122 to facilitate smooth discharge of foreign substances between the fixed shaft 14 and the mounting hole 120.

In some embodiments, as shown in fig. 20, the first guide surface a1 intersects the first end surface R1 to form a first intersection L1, the anti-blocking groove 120b further has a third sidewall S3, the third sidewall S3 is connected between the first sidewall S1 and the second sidewall S2, and the third sidewall S3 intersects the first end surface R1 to form a second intersection L2, obviously, both the first intersection L1 and the second intersection L2 are line segments. Wherein, the included angle α between the second intersecting line L2 and the first intersecting line L1 is less than 90 °, for example, α may be 60 °, or 70 °, or 75 °, or 80 °, or 86 °, etc., in the radial direction of the mounting hole 120, the direction of the first guide surface a1 toward the side wall (the first side wall S1 or the second side wall S2) opposite to the first guide surface a may deviate from the radial direction of the mounting hole 120, that is, there is a non-zero included angle between the first guide surface a1 and the radial direction of the mounting hole 120, and in the radial direction of the mounting hole 120, the first guide surface a1 may play a certain role of blocking the foreign matter between the fixed shaft 14 and the mounting hole 120, so as to prevent the foreign matter from moving toward the fixed shaft 14, and prevent the foreign matter from moving to the fixed shaft 14 to cause scraping of the surface of the fixed shaft 14, thereby playing a further role of protecting the fixed shaft 14.

Obviously, when the first guide surface a1 is a plane, it is convenient to ensure that the entire first guide surface a1 can block foreign matters to protect the fixing shaft 14.

It is understood that the first intersection line L1 may be a straight or curved line segment and the second intersection line L2 may be a straight or curved line segment.

Optionally, α is more than or equal to 70 ° and less than or equal to 85 °, so that a larger space is provided between the first guide surface a1 and the third side wall S3 on the premise of ensuring that the first guide surface a1 has a blocking effect on foreign matters, thereby facilitating further extension of the deposition time and facilitating processing of the first guide surface a 1.

In some embodiments, when the anti-blocking groove 120b is a through hole and at least one of the first side wall S1 and the second side wall S2 is formed with the first guide surface a1 and the second guide surface, the second guide surface intersects the second end surface R2 to form a third intersection line, where an included angle β between the third intersection line and the first intersection line L1 is less than 90 °, for example, β may be 70 °, 73 °, 80 °, 82 °, 85 °, or the like.

The water pump 100 according to the second aspect of the present invention includes a driving assembly 2 and the pump body assembly 1 according to the first aspect of the present invention, the driving assembly 2 is disposed outside the mounting cavity 110, and the driving assembly 2 includes a driving shaft 21 and a first magnetic member 22, the first magnetic member 22 is fixedly disposed on the driving shaft 21, so that the driving shaft 21 can drive the first magnetic member 22 to rotate; the second magnetic member 15 is embedded in the impeller 12, and the first magnetic member 22 is matched with the second magnetic member 15 to drive the impeller 12 to rotate, that is, the first magnetic member 22 applies magnetic force to the second magnetic member 15, so that the second magnetic member 15 is driven to rotate when the first magnetic member 22 rotates, and the rotation of the impeller 12 is realized.

According to the water pump 100 of the embodiment of the utility model, the pump body assembly 1 is adopted, so that the use reliability of the water pump is improved.

Optionally, the impeller 12 and the second magnetic member 15 are integrally injection molded, so that the impeller 12 can protect the second magnetic member 15 to a certain extent, and meanwhile, it is convenient to ensure that the impeller 12 and the second magnetic member 15 are reliably assembled, and the second magnetic member 15 is prevented from being easily separated from the impeller 12. Wherein, the impeller 12 can be selected as a plastic piece; the second magnetic member 114 may be selected as a magnetic ring.

Optionally, the first magnetic member 22 is fixedly arranged on the driving shaft 21 through a bracket 23, and the first magnetic member 22 is in interference fit with the bracket 23; the first magnetic member 22 may be selected as a magnetic ring.

In some embodiments, as shown in fig. 13 and 18, the driving assembly 2 further includes a second housing 24, a motor 26, a first bearing 27 and a second bearing 28, the second housing 24 is fixedly connected to the pump housing 11, the motor 26 is disposed in the second housing 24, the motor 26 includes a stator 261 and a rotor 262, the stator 261 is fixedly disposed in the second housing 24, and the stator 261 is disposed outside the rotor 262, so that the stator 261 can provide an excitation magnetic field to interact with the permanent magnet to rotate the rotor 262; the rotor 262 is fixedly connected to the drive shaft 21, and both axial ends of the drive shaft 21 are directly or indirectly mounted to the second housing 24 through the first bearing 27 and the second bearing 28, respectively, so that both the rotor 262 and the drive shaft 21 can rotate relative to the second housing 24. Both the first bearing 27 and the second bearing 28 may be selected as oil-impregnated bearings.

The second housing 24 includes a body 241 and a connecting shell 242, a receiving cavity is defined in the body 241, the body 241 is sealed by potting, the motor 26 is installed in the receiving cavity, one side of the receiving space facing the pump housing 11 is open, the connecting shell 242 is formed into a cylindrical structure, the connecting shell 242 is connected to one end of the body 241 in the axial direction of the driving shaft 21, the connecting shell 242 is fixedly connected to the pump housing 11, and the pump housing 11 covers the receiving cavity to separate the impeller 13 from the motor 26 and the first magnetic member 22; a sealing cover 20 is arranged on one side of the accommodating cavity facing the pump shell 11, and the sealing cover 20 can be in sealing fit with the second shell 24 to further cover the accommodating cavity so as to ensure the sealing performance of the accommodating cavity; the pump casing 11 includes a first casing 111 and a first cover 112, the first cover 112 is disposed on a side of the impeller 13 facing away from the fixed shaft 12, a groove 110c is formed on an inner wall of the first cover 112, and the first cover 112 is disposed between the first casing 111 and the coupling casing 242.

A second cover body 25 is fixedly arranged at one end of the body 241 far away from the pump shell 11, the second cover body 25 is used for supporting a second bearing 28, and the second cover body 25 can be a plastic piece; one axial end of the driving shaft 21 is provided with a wave pad 292, the wave pad 292 is used for providing axial pre-compression for the rotor 262 through the driving shaft 21, one side of the wave pad 292, which faces away from the driving shaft 21, is provided with a fixed cover 291, and the fixed cover 291 is used for axially supporting the wave pad 292.

As shown in fig. 4-7, the first housing 111 and the first cover 112 are connected by a snap fit, so as to facilitate disassembly and assembly; the first housing 111 is formed with a plurality of fitting grooves 111a and a plurality of engaging grooves 111b, the plurality of fitting grooves 111a and the plurality of engaging grooves 111b are alternately arranged one by one along the circumferential direction of the impeller 13, each fitting groove 111a corresponds to one engaging groove 111b, the first cover 112 is formed with a plurality of fasteners 112a, the free end of each fastener 112a is respectively provided with a locking projection 112b, each fastener 112a is correspondingly fitted to one fitting groove 111a along the circumferential direction of the impeller 13, and the locking projections 112b on the fasteners 112a can be locked in the engaging grooves 111 b.

A disinfection machine according to an embodiment of the third aspect of the utility model comprises a water pump 100 according to the above-mentioned embodiment of the second aspect of the utility model.

According to the disinfection machine provided by the embodiment of the utility model, the water pump 100 is adopted, so that the use reliability of the disinfection machine is improved.

For example, the disinfection machine pumps the disinfection solution in the water tank to the top end of the water curtain bracket through the water pump 100, so that the disinfection solution flows through the whole water curtain, and the wind passes through the whole water curtain and is sterilized and disinfected, thereby achieving the effect of indoor air disinfection.

Other constructions and operations of the sterilizing machine according to embodiments of the utility model are known to the person skilled in the art and will not be described in detail here.

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 utility model 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 utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A pump body assembly, comprising:

the pump shell is internally provided with an installation cavity, a water inlet and outlet and a water outlet which are communicated with the installation cavity are formed in the pump shell, and at least one water inlet and outlet is formed;

the impeller, the impeller rotationally locates in the installation cavity, the inlet outlet forms the installation cavity be in at least one side in the ascending both sides of impeller axle, the inlet outlet forms the lower part of installation cavity and downwardly extending to the perisporium of installation cavity.

2. The pump body assembly according to claim 1, wherein a peripheral wall of the mounting cavity is formed with a flow guide surface extending downwardly to a lower edge of the water inlet and outlet port.

3. The pump body assembly of claim 1, wherein the water inlet and outlet are provided with a connecting tube, a free end of the connecting tube extending downwardly below the pump housing.

4. The pump body assembly of claim 1, wherein the pump housing further defines a water inlet opening in communication with the mounting cavity, the water inlet opening being spaced above the water inlet and outlet openings.

5. The pump body assembly of claim 4, wherein the water inlet and outlet port and the water inlet port are located on the same axial side of the impeller.

6. The pump body assembly of claim 4, wherein the flow area of the water inlet and outlet is equal to the flow area of the water inlet.

7. The pump body assembly according to any one of claims 1 to 6, wherein a fixing shaft is fixedly arranged in the mounting cavity, the impeller is provided with a mounting hole, the mounting hole is a blind hole, the fixing shaft penetrates through the mounting hole and is in rotating fit with the impeller, a spherical protrusion is formed on one side of the impeller, which faces away from the fixing shaft, a groove is formed on the wall surface of the mounting cavity, the bottom wall of the groove is a curved surface which is concave towards the direction away from the impeller, and the spherical protrusion is supported on the bottom wall of the groove.

8. The pump body assembly according to claim 7, wherein the impeller has first and second axial end surfaces, respectively, the mounting hole has a peripheral wall formed with at least one anti-clogging groove extending in the axial direction of the mounting hole and having first and second side walls, respectively,

first lateral wall with at least one in the second lateral wall is formed with first guide surface second terminal surface orientation in the direction of first terminal surface, first guide surface orientation is kept away from prevent stifled groove's the direction of central axis extends to run through first terminal surface, prevent stifled groove the central axis with the central axis of mounting hole is parallel.

9. The pump body assembly of claim 8, wherein the anti-backup groove extends through the second end face, and the first guide surface extends to the second end face in a direction toward a central axis of the anti-backup groove.

10. The pump body assembly according to claim 8, wherein the anti-clogging groove extends through the second end face, at least one of the first side wall and the second side wall is further formed with a second guide surface located on a side of the first guide surface adjacent to the second end face, the second guide surface extending to the second end face toward a direction away from a central axis of the anti-clogging groove in a direction toward the second end face.

11. The pump body assembly according to claim 8, wherein the first end surface is disposed toward the water inlet and outlet, and the first end surface is provided with a plurality of centrifugal blades disposed at intervals along a circumferential direction of the mounting hole.

12. A water pump, comprising a pump body assembly according to any one of claims 1 to 11 and a driving assembly, wherein the driving assembly is disposed outside the mounting cavity and includes a driving shaft and a first magnetic member fixedly disposed on the driving shaft, a second magnetic member is embedded in the impeller, and the first magnetic member and the second magnetic member cooperate to drive the impeller to rotate.

13. A disinfection machine comprising a water pump according to claim 12.

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