CN221824090U - Submersible pump and pet water dispenser - Google Patents

Abstract

The utility model provides a submersible pump and a pet water dispenser, wherein the submersible pump comprises a pump shell, a stator assembly, a rotor assembly and an impeller, and the pump shell comprises a rotor cavity and an impeller cavity which is adjacent to and communicated with the rotor cavity; the rotor assembly is arranged in the rotor cavity, the head end of a rotating shaft of the rotor assembly extends into the impeller cavity, and the impeller is arranged on the part of the rotating shaft extending into the impeller cavity; the impeller cavity comprises a water inlet and a water outlet, and when the impeller is driven by the rotor assembly to rotate, external liquid is sucked into the impeller cavity through the water inlet and the liquid in the impeller cavity is pushed out of the impeller cavity through the water outlet; the water inlet is positioned at one side of the impeller cavity far away from the rotor cavity, and the orthographic projection of the rotating shaft at one side of the impeller cavity far away from the rotor cavity deviates from the center of the water inlet. The utility model can realize the rapid drainage and exhaust of the submersible pump.

Description

Submersible pump and pet water dispenser

Technical Field

The utility model relates to the field of water pumps, in particular to a submersible pump and a pet water dispenser.

Background

With the increase of pet raising users, the application range of the water dispenser for pets is gradually expanded. The pet drinking machine is a machine for providing drinking water for pets, generally pumps water in a water tank into a drinking trough by using a submersible pump and the like for the pets to use, and the submersible pump is powered by an external power supply.

In the above-mentioned pet drinking machine, since the consumption of water in the water tank is relatively fast due to the drinking of the pet, it is necessary to frequently add water into the water tank. The existing submersible pump is relatively low in power, and water is drained and exhausted relatively slowly after water is lacked and added again.

Disclosure of utility model

The utility model aims to solve the technical problem that the water drainage and the air exhaust of the submersible pump are relatively slow, and provides the submersible pump and the pet water dispenser.

The technical scheme of the utility model for solving the technical problems is that the submersible pump comprises a pump shell, a stator assembly, a rotor assembly and an impeller, wherein the pump shell comprises a rotor cavity and an impeller cavity which is adjacent to and communicated with the rotor cavity; the rotor assembly is arranged in the rotor cavity, the head end of a rotating shaft of the rotor assembly extends into the impeller cavity, and the impeller is arranged on the part of the rotating shaft extending into the impeller cavity;

The impeller cavity comprises a water inlet and a water outlet, and when the impeller is driven by the rotor assembly to rotate, liquid outside the impeller cavity is sucked into the impeller cavity through the water inlet and liquid in the impeller cavity is pushed out of the impeller cavity through the water outlet; the water inlet is positioned at one side of the impeller cavity far away from the rotor cavity, and the orthographic projection of the rotating shaft at one side of the impeller cavity far away from the rotor cavity deviates from the center of the water inlet.

As a further improvement of the utility model, the distance between the orthographic projection of the rotating shaft on the side of the impeller cavity away from the rotor cavity and the center of the water inlet is greater than or equal to 30% of the diameter of the water inlet.

As a further improvement of the utility model, the pump housing comprises a main housing and a front cover, the rotor cavity and the impeller cavity being both located within the main housing; one side of the impeller cavity far away from the rotor cavity is exposed out of the front end surface of the main shell and forms a first opening on the front end surface, and the rotor assembly and the impeller are respectively arranged in the rotor cavity and the impeller cavity through the first opening;

The front cover is arranged on the front end face of the main shell and is used for sealing the first opening, the front cover is provided with a first through hole communicated with the outside and a second through hole communicated with the impeller cavity, and the water inlet of the impeller cavity is formed by the second through hole.

As a further improvement of the utility model, the main body part of the first through hole is positioned at the bottom of the front cover, and filter cotton is filled in the front cover, and the liquid flowing in from the first through hole flows into the impeller cavity through the second through hole after passing through the filter cotton.

As a further improvement of the utility model, the pump housing comprises a rear cover; a stator cavity is further arranged in the main shell, and the rotor cavity is inserted into the stator cavity; the stator cavity is exposed out of the rear end face of the main shell and a second opening is formed in the rear end face, the stator assembly is mounted to the stator cavity through the second opening, and the rear cover is fixed to the rear end face of the main shell and seals the second opening.

As a further improvement of the utility model, the submersible pump further comprises a control circuit board and a water level detector which are respectively arranged in the stator cavity, and the water level detector is adjacent to the inner wall of the main shell; the water level detector and the stator assembly are respectively and electrically connected with the control circuit board, and the control circuit board outputs alternating current to the stator assembly only when the water level detector generates a trigger signal.

As a further improvement of the utility model, the pump shell is provided with a water outlet pipe communicated with the water outlet of the impeller cavity, and the water outlet pipe is connected to the upper surface of the pump shell and extends to the upper side of the pump shell.

As a further improvement of the utility model, the water outlet is positioned at the side part of the impeller cavity and adjacent to the top part of the pump shell, and the center of the water inlet is positioned between the orthographic projection of the water outlet at the side of the impeller cavity away from the rotor cavity and the orthographic projection of the rotating shaft at the side of the impeller cavity away from the rotor cavity.

As a further improvement of the utility model, the bottom of the pump shell is provided with a plurality of suckers, and the submersible pump is fixedly adsorbed on the surface of an object through the suckers.

The utility model also provides a pet water dispenser which comprises a water tank, a water trough and the submersible pump.

The utility model has the following beneficial effects: the center of the water inlet of the impeller cavity is deviated from the rotor rotating shaft, so that negative pressure generated at the water inlet due to rotation of the impeller under the same power is larger, and the submersible pump can rapidly discharge water and exhaust.

Drawings

FIG. 1 is a schematic diagram of a submersible pump according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of a submersible pump according to an embodiment of the present utility model.

Fig. 3 is an exploded view of a submersible pump according to an embodiment of the present utility model.

Fig. 4 is a schematic diagram of a water shortage shutdown function of a submersible pump according to an embodiment of the present utility model.

Fig. 5 is a schematic circuit topology diagram of a control circuit board of a submersible pump according to an embodiment of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; unless specified or indicated otherwise, the terms "coupled," "fixed," and the like are to be construed broadly and are, for example, capable of being coupled either permanently or detachably, or integrally or electrically; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

1-3 Are schematic diagrams of a submersible pump according to an embodiment of the utility model, which can be applied to a pet drinking machine and pump water in a water tank to a drinking trough. The submersible pump of the embodiment comprises a pump shell 10, a stator assembly 20, a rotor assembly 30 and an impeller 50, wherein the stator assembly 20, the rotor assembly 30 and the impeller 50 are respectively arranged on the pump shell 10, and similarly to the conventional submersible pump, the stator assembly 20 can generate an alternating magnetic field after being electrified, and the rotor assembly 30 rotates under the action of the alternating magnetic field and drives the impeller 50 to rotate, so that liquid pumping is realized. The stator assembly 20, the rotor assembly 30, and the impeller 50 may adopt the conventional scheme, for example, the stator assembly 20 includes a U-shaped iron core, two bobbins respectively installed on two iron core arms of the U-shaped iron core, windings respectively wound on the two bobbins, and the like, and the rotor assembly 30 includes a rotating shaft and at least two permanent magnets with different polarity directions disposed around the rotating shaft, which are not described herein.

The pump casing 10 includes a rotor chamber 111 and an impeller chamber 112, and the rotor chamber 111 and the impeller chamber 112 are adjacent to and communicate with each other, for example, the rotor chamber 111 and the impeller chamber 112 may be distributed in a direction parallel to a lower surface of the pump casing 10. Also, similar to existing submersible pumps, the radial dimension of the rotor cavity 111 is smaller than the radial dimension of the impeller cavity 112. The rotor assembly 30 is installed in the rotor chamber 111 in such a manner that the rotation shaft 31 is parallel to the lower surface of the pump housing 10, and the head end of the rotation shaft 31 of the rotor assembly 30 extends into the impeller chamber 112, and the impeller 50 is installed on the rotation shaft 31 at a portion extending into the impeller chamber 112, so that the impeller 50 can be rotated by the rotation shaft 31. In one embodiment of the present utility model, the rotor assembly 30 may include a rotor body composed of a rotation shaft 31 and permanent magnets, a front bearing 32 and a rear bearing 33, the rotor body being rotatably installed in the rotor chamber 111 by the rear bearing 33 fixed to the bottom of the rotor chamber 111 and the front bearing 32 fixed to the front end opening of the rotor chamber 111, and since no charging part is provided on the rotor assembly 30, the rotor chamber 111 and the impeller chamber 112 do not serve as a waterproof barrier, simplifying the structure.

The impeller cavity 112 includes a water inlet 121 and a water outlet, and when the impeller 50 is driven to rotate by the rotor assembly 30, liquid outside the impeller cavity 112 is sucked into the impeller cavity 112 through the water inlet 121 and liquid in the impeller cavity 112 is pushed out of the impeller cavity 112 through the water outlet, so that liquid pumping is realized. The water inlet 121 is located at a side of the impeller cavity 112 away from the rotor cavity 111, and an orthographic projection of the rotating shaft 31 at a side of the impeller cavity 112 away from the rotor cavity 111 (i.e., a plane in which the water inlet 121 is located) is offset from a center of the water inlet 121.

Different from the structure that the center of the rotating shaft of the rotor, the center of the impeller cavity and the center of the water inlet are positioned in the same straight line in the conventional submersible pump, the center of the water inlet 121 of the impeller cavity 112 is deviated from the rotor rotating shaft 31, so that the negative pressure generated at the water inlet 121 due to the rotation of the impeller 50 is larger under the same power, and the submersible pump can realize rapid water drainage and exhaust.

In one embodiment of the present utility model, the center of the water inlet 121 is deviated from the rotor shaft 31 by 30% or more of the diameter of the water inlet 121, so that the water outlet speed of the water outlet of the submersible pump can be significantly improved. For example, for a submersible pump with working voltage of direct current 5V and working current of 220mA, when the center of a water inlet is positioned at the extension line of a rotating shaft, the water outlet of the submersible pump can normally discharge water after more than 60 seconds when the submersible pump is immersed in water; under the same condition, if the distance of the center of the water inlet, which deviates from the extension line of the rotating shaft, is 30% of the diameter of the water inlet, the submersible pump can normally discharge water in less than about 5 seconds.

In one embodiment of the present utility model, to ensure water intake of the impeller chamber 112, the water inlet 121 of the impeller chamber 112 is located in the orthographic projection of the rotation surface of the impeller 50 on the side of the impeller chamber 112 away from the rotor chamber 111 (i.e., the plane in which the water inlet 121 is located). I.e. the rotation area of the impeller 50 covers the water inlet 121, thereby ensuring that the negative pressure generated at the water inlet 121 by the rotation of the impeller 50 is maximized. The size of the water inlet 121 may be designed according to the application of the submersible pump, the rated rotation speed of the rotor, the size of the impeller, etc., and will not be described herein.

In one embodiment of the present utility model, the pump casing 10 includes a main casing 11 and a front cover 12, where both the main casing 11 and the front cover 12 may be injection molded from plastic materials, and the rotor cavity 111 and the impeller cavity 112 are located in the main casing 11. The side of the impeller chamber 112 remote from the rotor chamber 111 is exposed to the front end surface of the main housing 11, and a first opening is formed in the front end surface, and the rotor assembly 30 and the impeller 50 are attached to the rotor chamber 111 and the impeller chamber 112, respectively, via the first opening. Specifically, the rear bearing 33 and the front bearing 32 may be assembled to both ends of the rotation shaft 31, respectively, and then the entire rotor assembly 30 may be inserted into the rotor chamber 111 after passing through the impeller chamber 112, and then the impeller 50 may be fixed to a portion of the rotation shaft 31 protruding to the impeller chamber 112.

The front cover 12 is mounted on the front end surface of the main housing 11 and seals the first opening, that is, the impeller cavity 112 is located in the area enclosed by the main housing 11 and the front cover 12. Specifically, the front cover 12 may be fastened to the main housing 11 by means of a snap fit, a tight fit, a screw, an adhesive, etc., and, for facilitating maintenance of the rotor assembly 30 and the impeller 50, the front cover 12 is preferably detachably fastened to the front end of the main housing 11. The front cover 12 has a first through hole 122 communicating with the outside of the pump case 10 and a second through hole communicating with the impeller chamber 112, and the water inlet 121 of the impeller chamber 112 may be formed of the second through hole, i.e., the center of the second through hole is not on an extension of the center of the rotation shaft 31.

By the above-described structure of the pump casing 10, the assembly of the rotor assembly 30 and the impeller 50 is facilitated.

In order to improve the quality of water pumped by the submersible pump and prevent impurities in the water tank from entering the impeller cavity 112, in one embodiment of the present utility model, the main body of the first through hole 122 is located at the bottom of the front cover 12 (may extend to the side of the front cover 12 partially), and the front cover 12 is filled with the filter cotton 61 (accordingly, the front cover 12 must have a certain length in the axial direction of the rotating shaft 31), and the liquid flowing from the first through hole 122 flows into the impeller cavity 112 through the second through hole after passing through the filter cotton 61, so that larger solid particles or hair in the water tank can be filtered by the filter cotton 61, and winding to the impeller 50 or blocking the water inlet, the water outlet, and the like is prevented, which affects the normal use of the submersible pump.

Specifically, the front cover 12 may have a receiving cavity therein, and the first through hole 122 and the second through hole are respectively communicated with the receiving cavity, and the filter cotton 61 is located in the receiving cavity. To facilitate replacement of the filter cotton 61, the width of the first through hole 122 may be the same as that of the front cover 12.

To fix the submersible pump in the tank, in one embodiment of the utility model, the bottom of the main housing 11 has a plurality of suction cups 63, and the submersible pump is sucked and fixed to the surface of the object, for example, to the bottom of the tank, by the suction cups 63, avoiding its floating under the buoyancy of the liquid.

The sucker structure has the advantages of simple structure, convenient operation and the like. Specifically, a fixing hole may be provided at the bottom of the main housing 11, and the suction cup 63 may be fitted to the bottom of the main housing 11 by a tight fit. The suction cup 63 is not limited to being fixed to the bottom surface of the main casing 11, and for example, the suction cup 63 may be fixed to the bottom of the front cover 12 (avoiding the first through hole 122).

In one embodiment of the present utility model, the pump housing 10 may include a rear cover 13 in addition to the main housing 11 and the front cover 12. Accordingly, a stator cavity 113 is further provided in the main housing 11, the rotor cavity 111 is inserted into the stator cavity 113, and the stator cavity 113 is exposed from a rear end surface of the main housing 11 and forms a second opening on the rear end surface, the stator assembly 20 is mounted to the stator cavity 113 through the second opening, and the core arms of the stator core in the stator assembly 20 surround the rotor cavity 111. The rear cover 13 is fixed to the rear end face of the main casing 11 and closes the second opening.

Through the structure, the rotor cavity 111 and the stator cavity 113 are isolated from each other, so that external water is prevented from entering the stator cavity 113 through the rotor cavity 111, and the waterproofing of the stator cavity 113 is facilitated.

In one embodiment of the present utility model, the submersible pump further includes a control circuit board 40 and a water level detector, wherein the control circuit board 40 and the water level detector are respectively installed in the stator cavity 113, and the water level detector is adjacent to the inner wall of the main housing 11.

Referring to fig. 5, a control chip U1 is provided on the control circuit board 40, and the control chip U1 converts direct current from a power chip U2 (the power chip U2 converts externally inputted electric energy into direct current of a predetermined voltage) into alternating current and outputs the alternating current to the coil of the stator assembly 20, thereby causing the coil of the stator assembly to generate an alternating magnetic field. The water level detector U3 and the stator assembly 20 are electrically connected to the control chip U1, respectively (e.g., the control chip U1 is electrically connected to the coil of the stator assembly 20 through the terminal H1). The water level detector U3 may specifically be a capacitive detector, which triggers the control chip U1 to act through a change of a capacitance value, that is, the control chip U1 outputs an alternating current to the stator assembly 20 only when the water level detector U1 generates a trigger signal.

In particular, the water level detector may be integrated onto the control circuit board 40 or electrically connected with the control circuit board 40 through a wire. In order to improve the waterproof level, the stator cavity 113 may be filled with a potting adhesive, and a power supply line for supplying power to the power chip U2 may be led out of the pump casing 10 through the rear cover 13.

In one embodiment of the present utility model, the pump casing 10 is further provided with a water outlet pipe 62 in communication with the water outlet of the impeller chamber 112, and the water outlet pipe 62 is connected to the upper surface of the pump casing 10 (for example, the upper surface of the main casing 11) and extends upward of the pump casing 10, so that the liquid can be pumped upward. Specifically, the outlet pipe 62 may have a structure for connecting a water pipe so as to facilitate connection of the water pipe and pumping of liquid to a water trough of the water dispenser or the like through the water pipe.

Accordingly, the water outlet of the impeller chamber 112 may be located on the side of the impeller chamber 112 adjacent the top of the pump housing 10, with the center of the water inlet 121 being located between the front projection of the water outlet on the side of the impeller chamber 112 away from the rotor chamber 111 (i.e., the plane in which the water inlet is located) and the front projection of the shaft 31 on the side of the impeller chamber away from the rotor chamber (i.e., the plane in which the water inlet is located). Thereby enabling a closer formation between the water inlet 121 and the water outlet, facilitating liquid pumping.

The utility model also provides a pet water dispenser, which comprises a water tank, a water trough and the submersible pump, wherein the water trough is positioned at the top of the water tank, the submersible pump is detachably arranged at the bottom of the water tank and pumps water in the water tank to the water trough, the water trough is provided with an overflow port, and water which is not drunk in time flows into the water tank from the overflow port.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (10)

1. A submersible pump comprising a pump housing, a stator assembly, a rotor assembly, and an impeller, the pump housing comprising a rotor cavity and an impeller cavity adjacent to and in communication with the rotor cavity; the rotor assembly is arranged in the rotor cavity, the head end of a rotating shaft of the rotor assembly extends into the impeller cavity, and the impeller is arranged on the part of the rotating shaft extending into the impeller cavity;

The impeller cavity comprises a water inlet and a water outlet, and when the impeller is driven by the rotor assembly to rotate, liquid outside the impeller cavity is sucked into the impeller cavity through the water inlet and liquid in the impeller cavity is pushed out of the impeller cavity through the water outlet; the water inlet is positioned at one side of the impeller cavity far away from the rotor cavity, and the orthographic projection of the rotating shaft at one side of the impeller cavity far away from the rotor cavity deviates from the center of the water inlet.

2. The submersible pump of claim 1, wherein a distance between an orthographic projection of the shaft on a side of the impeller cavity away from the rotor cavity and a center of the water inlet is greater than or equal to 30% of a diameter of the water inlet.

3. The submersible pump of claim 1, wherein the pump housing comprises a main housing and a front cover, the rotor cavity and the impeller cavity both being located within the main housing; one side of the impeller cavity far away from the rotor cavity is exposed out of the front end surface of the main shell and forms a first opening on the front end surface, and the rotor assembly and the impeller are respectively arranged in the rotor cavity and the impeller cavity through the first opening;

The front cover is arranged on the front end face of the main shell and is used for sealing the first opening, the front cover is provided with a first through hole communicated with the outside and a second through hole communicated with the impeller cavity, and the water inlet of the impeller cavity is formed by the second through hole.

4. A submersible pump according to claim 3, wherein the main body portion of the first through hole is located at the bottom of the front cover, and filter cotton is filled in the front cover, and the liquid flowing in from the first through hole flows into the impeller cavity through the second through hole after passing through the filter cotton.

5. A submersible pump according to claim 3, wherein the pump housing comprises a rear cover; a stator cavity is further arranged in the main shell, and the rotor cavity is inserted into the stator cavity; the stator cavity is exposed out of the rear end face of the main shell and a second opening is formed in the rear end face, the stator assembly is mounted to the stator cavity through the second opening, and the rear cover is fixed to the rear end face of the main shell and seals the second opening.

6. The submersible pump of claim 5, further comprising a control circuit board and a water level detector mounted within the stator cavity, respectively, and wherein the water level detector is adjacent to the inner wall of the main housing; the water level detector and the stator assembly are respectively and electrically connected with the control circuit board, and the control circuit board outputs alternating current to the stator assembly only when the water level detector generates a trigger signal.

7. The submersible pump according to any one of claims 1 to 6, wherein a water outlet pipe which is communicated with the water outlet of the impeller chamber is provided on the pump housing, and the water outlet pipe is connected to the upper surface of the pump housing and extends upward of the pump housing.

8. The submersible pump of claim 7, wherein the water outlet is located on a side of the impeller chamber adjacent a top of the pump housing, and wherein the water inlet is centered between an orthographic projection of the water outlet on a side of the impeller chamber away from the rotor chamber and an orthographic projection of the shaft on a side of the impeller chamber away from the rotor chamber.

9. A submersible pump according to any one of claims 1-6, wherein the bottom of the pump housing has suction cups, and the submersible pump is secured to the surface of an object by suction through the suction cups.

10. A pet drinking machine comprising a water tank, a water trough and a submersible pump according to any one of claims 1 to 9.