WO2022188267A1

WO2022188267A1 - Water pump

Info

Publication number: WO2022188267A1
Application number: PCT/CN2021/095147
Authority: WO
Inventors: 陶恒飞
Original assignee: 佛山市顺德区一拓电气有限公司
Priority date: 2021-03-08
Filing date: 2021-05-21
Publication date: 2022-09-15
Also published as: CN113007103B; CN113007103A

Abstract

A water pump, comprising a shell (15), a filter device (16), an electric motor housing (17), an electric motor, a volute (14) and an impeller (19), wherein the volute (14) is positioned between the filter device (16) and an outer housing (171), and the volute (14) is connected to the filter device (16) and the outer housing (171); the volute (14) is provided with a chamber (1) and a spiral flow channel (2) in communication with the chamber (1); the chamber (1) is provided with a water inlet (3) and water intake holes (4) provided on the periphery of the water inlet (3); the water inlet (3) and the water intake holes (4) are all in communication with a water output end (23); a connecting position (8) connected to the water output end (23) is also configured on the periphery of the water inlet (3); a gap is formed between the connecting position (8) and the water output end (23); the spiral flow channel (2) is provided with a water outlet (5) in communication with a water output portion (21); the water outlet (5) is provided with first notches (6); a first water flow channel is formed between the first notches (6) and an inner wall of the shell (15), and is in communication with a water cooling cavity (24); recesses (7) are arranged on the periphery of the volute (14); and a second water flow channel is formed between the recesses (7) and the inner wall of the shell (15), and is in communication with the water cooling cavity (24) and the gap between the connecting position (8) and the water output end (23). The water pump has a simple structure, can cool down the temperature of the electric motor, and can improve a heat dissipation effect.

Description

a water pump

technical field

The invention relates to the technical field of water pumps, in particular to a water pump.

Background technique

Water-cooled water pumps are machinery that transports liquids or pressurizes liquids. Existing water pumps generally include a volute, an impeller installed in the volute, a motor for driving the impeller to rotate, and other components. The main shaft of the motor is used to drive the impeller to rotate to form a negative pressure. The water in the pool is sucked into the volute under the external atmospheric pressure and supplements this space, and then thrown out of the volute by the impeller, and the water can be continuously transported.

During the working process of the pump, the motor needs to run continuously to generate a certain amount of heat. In order to reduce the operating temperature of the motor, the existing water pump is equipped with a radiator attached to the motor, resulting in a complicated internal structure of the water pump and a large volume of the water pump.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a water pump with a simple structure, which can cool the temperature of the motor and improve the heat dissipation effect.

In order to achieve the above object, the present invention provides a water pump, which includes a casing, a filter device, a motor casing, a motor, a volute, and an impeller;

Both the filtering device and the volute are installed in the casing, and the casing is provided with a first feeding end and a water outlet;

The filter device is provided with a second feed end and a water outlet, and the second feed end communicates with the first feed end;

the motor housing is connected with the housing, and the motor housing is provided with a water cooling cavity;

The volute is located between the filter device and the motor casing, and the volute is connected to the filter device and the motor casing respectively, and the volute is provided with a chamber and is connected to the chamber. The chamber has a water inlet and a water inlet hole arranged on the outer periphery of the water inlet, and the water inlet and the water inlet hole are both communicated with the water outlet. The outer periphery is also provided with a connection position connected to the water outlet, a gap is formed between the connection position and the water outlet, the spiral flow channel has a water outlet communicated with the water outlet, and the water outlet is provided with a gap. There is a first gap, a first water channel is formed between the first gap and the inner wall of the casing, the first water channel is communicated with the water cooling cavity, and the outer circumference of the volute is provided with a recess, so A second water flow channel is formed between the recess and the inner wall of the casing, and the second water flow channel is respectively communicated with the water cooling cavity and the gap;

One end of the impeller is connected to the motor through the outer casing and the inner casing in sequence, and the other end of the impeller is located in the chamber;

In the working state, the material enters the filtering device from the first feeding end through the second feeding end, and the filtered water enters the water inlet from the water outlet, and passes through the chamber and the water inlet. The spiral flow channel enters the water outlet, a part of the water in the water outlet is discharged through the water outlet, and the other part of the water in the water outlet passes from the first gap along the first water channel Enter the water cooling chamber, then enter the gap along the second water flow channel through the recess, and enter the chamber and the spiral flow channel through the water inlet hole, and flow from the water outlet through the water outlet. The water outlet is discharged.

Optionally, the number of the water inlet holes is several, and each of the water inlet holes is evenly distributed on the outer circumference of the water inlet.

Optionally, the connection position is a concave portion recessed inward along the axial direction of the volute, the concave portion is in clearance fit with the water outlet, and the water inlet hole is provided on the concave portion.

Optionally, the volute is provided with two rings of annular protrusions outward along the axial direction thereof, and the concave portion is formed between the annular protrusions.

Optionally, the sum of the opening areas of the water inlet holes is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the opening of the water inlet hole is located.

Optionally, the number of the first gaps is two or more.

Optionally, each of the first notches is symmetrically arranged on both sides of the water outlet.

Optionally, the opening area of the first notch is 0.7 mm ² to 176 mm ² .

Optionally, at least two connecting protrusions extend along the radial direction of the outer circumference of the volute, and the concave positions are formed between the connecting protrusions.

Optionally, the volute casing is provided with a limit slot matched with the motor casing along its axial direction, and the volute is connected to the motor casing through the limit slot.

Optionally, a side of the volute facing the motor is provided with a connecting pipe, the first end of the connecting pipe is communicated with the chamber, and the end face of the second end of the connecting pipe is connected to the The motor case abuts.

Optionally, a second notch is provided on the second end of the connecting pipe, the second notch is recessed along the axis direction of the connecting pipe, and the second notch is between the inner wall of the motor housing and the second notch. A third water flow channel is formed, and the third water flow channel is respectively communicated with the water cooling cavity and the chamber.

Optionally, the opening area of the second notch is 0.7 mm ² to 176 mm ² .

Optionally, the number of the second gaps is at least two.

Optionally, each of the second notches is symmetrically arranged along the axis of the connecting pipe.

Optionally, the impeller includes a connecting shaft, a wheel housing and blades, one end of the connecting shaft is connected to the motor through the motor housing in sequence, and the other end of the connecting shaft passes through the wheel housing and is connected to the motor. The blades are connected, the wheel housing is located in the chamber, the blades are installed in the wheel housing, the wheel housing is provided with a water flow through hole, and the third flow water channel is connected with the flow water through hole through the flow water through hole. The chambers communicate.

Optionally, the size of the opening area of the water through hole is 0.7 mm ² to 315 mm ² .

Optionally, when the number of the water flow through holes is more than two, each of the flow water through holes is evenly arranged on the wheel housing.

Optionally, the motor casing includes an outer casing and an inner casing installed in the outer casing, the water cooling cavity is formed between the outer casing and the inner casing, and the motor is installed in the inner casing, The housing is connected to the housing, and the volute is located between and connected to the filter device and the housing.

Optionally, it also includes an electric control module electrically connected to the motor, and the electric control module is mounted on the housing.

Optionally, one end of the inner casing away from the volute is an open end, the open end is provided with an annular side plate extending outward, and the annular side plate abuts against the inner wall of the outer casing.

Optionally, both the outer wall of the inner shell and the inner wall of the outer shell are provided with an anti-oxidative coating.

Optionally, the inner wall of the casing is provided with a stepped surface that expands outward, and the outer edge of the annular edge plate is in abutment with the stepped surface.

Optionally, the motor housing further includes a cover plate, the cover plate is detachably connected to the housing, and the cover plate is provided with a pressing plate for pressing the annular edge plate on the stepped surface.

Optionally, the cover plate is further provided with a limit plate abutting against the inner wall of the inner shell, and the stepped surface, the pressing plate and the limit plate are all in the shape of a ring.

Compared with the prior art, the water pump provided by the present invention has the beneficial effects that: the present invention provides a connection position on the outer periphery of the water inlet of the volute that fits with the water outlet end of the filter device, so that the connection position and the water outlet end are connected with each other. There is a gap through which the water flow can pass. By providing a first notch at the water outlet of the volute, a first water flow channel is formed between the first notch and the casing. By providing a concave portion on the outer periphery of the volute, a second water flow channel is formed between the concave portion and the casing. When the pump is working, the impeller rotates in the chamber to form negative pressure, and the material is sucked into the pump. After the material passes through the filter device, it enters the chamber of the volute and the spiral flow channel in turn from the water inlet, and is thrown out by the impeller to the water outlet. The water located in the other part of the water outlet enters the water cooling chamber through the first gap to cool the motor, absorbs the heat of the motor, enters the chamber and the spiral flow channel from the recess through the gap and the water inlet hole, and is discharged from the water outlet and the water outlet. Complete the water cooling cycle. By opening holes and recesses at specific positions of the volute, the water pump is formed with two water circuits, a filtering water circuit and a water-cooling circulation main circuit, during operation. The water is used to cool the motor, and there is no need to install a heat sink for the motor. A better heat dissipation effect of the water pump is achieved, and the cost of the water pump is effectively reduced.

Description of drawings

Fig. 1 is the structural representation of the water pump of the embodiment of the present invention;

Fig. 2 is the exploded view of the water pump of the embodiment of the present invention;

3 is a schematic diagram of the connection structure of the water pump and the motor housing according to the embodiment of the present invention;

Fig. 4 is the perspective view of the volute of the embodiment of the present invention in the front view direction;

Fig. 5 is the perspective view of the volute of the embodiment of the present invention in the rear view direction;

6 is a schematic structural diagram of a first half-shell of an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a second half-shell according to an embodiment of the present invention;

8 is a perspective view of an impeller of an embodiment of the present invention;

9 is a schematic structural diagram of a motor housing according to an embodiment of the present invention;

10 is a perspective view of a motor casing according to an embodiment of the present invention;

FIG. 11 is a perspective view of the inner shell of the embodiment of the present invention.

In the figure, 1, chamber; 2, spiral flow channel; 3, water inlet; 4, water inlet hole; 5, water outlet; 6, first notch; 7, concave position; 8, connecting position; 9, annular convex 10, connecting convex part; 11, limiting protrusion; 12, connecting pipe; 13, second notch; 14, volute; 141, first half shell; 142, second half shell; 15, shell body; 16, filter device; 17, motor shell; 171, outer shell; 172, inner shell; 18, limit slot; 19, impeller; 191, connecting shaft; 192, wheel shell; 193, blade; 20, first A feed end; 21, water outlet; 22, second feed end; 23, water outlet; 24, water cooling chamber; 25, water through hole; 26, connecting piece; 27, installation position; 28, stepped surface; 29 30, pressure plate; 31, limit plate; 32, annular groove; 33, annular edge plate.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms used in the present invention The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device. Or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Figures 1 to 11, a water pump according to a preferred embodiment of the present invention includes a casing 15, a filter device 16, a motor casing 17, a motor (not shown in the figure), a volute 14, and an impeller 19.

As shown in FIG. 1 , both the filter device 16 and the volute 14 are installed in the housing 15 . The casing 15 is provided with a first feeding end 20 and a water outlet 21 . The housing 15 serves to protect the filter device 16 and the volute 14 .

As shown in FIG. 2 , the filter device 16 is provided with a second feed end 22 and a water outlet end 23 , and the second feed end 22 communicates with the first feed end 20 . The filter device 16 is provided with a filter basket.

As shown in FIG. 1 , FIG. 2 and FIG. 9 , the motor housing 17 is connected to the housing 15 , and a water cooling cavity 24 is provided in the motor housing 17 .

As shown in FIGS. 1 to 3 , the water pump in this embodiment further includes a connecting piece 26 disposed between the casing 15 and the motor casing 17 , and the casing 15 and the outer casing 171 are connected by the connecting piece 26 .

As shown in FIG. 1 and FIG. 2 , one end of the impeller 19 is connected to the motor through the motor casing 17 in turn, and the other end of the impeller 19 is located in the chamber 1 .

As shown in FIG. 1 , the volute 14 is located between the filter device 16 and the motor housing 17 , and the volute 14 is connected to the filter device 16 and the motor housing 17 respectively. The volute 14 is provided with a chamber 1 and a spiral flow channel 2 communicating with the chamber 1 , and the chamber 1 is located in the middle of the volute 14 . As shown in FIGS. 4 and 6 , the chamber 1 has a water inlet 3 and at least one water inlet hole 4 arranged on the outer periphery of the water inlet 3 . The water inlet 3 and the water inlet hole 4 are both communicated with the water outlet 23 . As shown in FIG. 5 , the outer periphery of the water inlet 3 is further provided with a connection position 8 , which is connected to the water outlet 23 of the filter device 16 , and a gap for the water supply to flow through is formed between the connection position 8 and the outlet end 23 . A water outlet 5 is provided at the tangent of the outer circumference of the spiral flow channel 2 , and the water outlet 5 is disposed opposite and communicated with the water outlet 21 of the casing 15 . At least one side of the water outlet 5 is provided with a first gap 6 , a first water channel is formed between the first gap 6 and the inner wall of the housing 15 , and the first water channel communicates with the water cooling cavity 24 . The outer peripheral side of the volute 14 is provided with a concave position 7, and a second water flow channel is formed between the concave position 7 and the inner wall of the casing 15, and the second water flow channel is respectively connected with the water cooling cavity 24 and the gap.

As shown in FIGS. 6 and 7 , the volute 14 in this embodiment includes a first half-shell 141 and a second half-shell 142 . Both the first half casing 141 and the second half casing 142 are made of plastic, which can reduce the overall weight of the water pump. The first half-shell 141 and the second half-shell 142 are connected by welding or other mechanical connection. The opposite side of the first half-shell 141 and the second half-shell 142 is provided with a snap-fitting protrusion (not shown in the figure), and the opposite side of the second half-shell 142 and the first half-shell 141 is provided with The connection between the first half-shell 141 and the second half-shell 142 is reinforced by the snap-fit with the snap-fit concave portion (not shown in the figure). The first half-shell 141 and the second half-shell 142 are connected to form the chamber 1 and the spiral flow channel 2 . The first half-shell 141 and the second half-shell 142 together form the water outlet 5 . As shown in FIG. 6 , the water inlet 3 is disposed at the center of the first half-shell 141 , and the shape of the water inlet 3 is circular. The connecting position 8 is provided on the side of the first half-shell 141 away from the second half-shell 142 , and the concave position 7 is provided on the outer circumference of the first half-shell 141 .

In the working state, the material enters the filter device 16 from the first feed end 20 through the second feed end 22, and the filtered water enters the water inlet 3 from the water outlet 23, passes through the chamber 1 and the spiral flow channel 2, and enters the outlet. In the water outlet 5, a part of the water located in the water outlet 5 is discharged through the water outlet 21, and the water channel of this part is simply referred to as the filtering water channel. Another part of the water located in the water outlet 5 enters the water cooling chamber 24 from the first gap 6 along the first water channel, and then enters the gap along the second water channel through the recess 7, and enters the chamber 1 from the water inlet hole 4 in sequence. And the spiral flow channel 2, and finally discharged from the water outlet 21 through the water outlet 5, and the above water channel is referred to as the main water cooling cycle for short.

Based on the above technical solutions, in the working state, the motor drives the impeller 19 to rotate, the impeller 19 rotates to generate negative pressure, and the external materials are sucked into the water pump. The material enters from the first feed end 20, after being filtered by the filter basket, the filtered water flows out from the water outlet end 23, enters the chamber 1 and the spiral flow channel 2 from the water inlet 3 in turn, and exits the shell through the water outlet 5. The water outlet 21 of 15 is discharged out of the water pump to form a conventional filtering water path of the water pump, which meets the normal working requirements of the water pump. In the present invention, a first gap 6 is provided on the water outlet 5, so that a first water flow channel communicating with the water cooling cavity 24 is formed between the first gap 6 and the inner wall of the housing 15, so that part of the water at the water outlet 5 can be It flows through the outer surface of the inner shell 172 sheathed outside the motor to reduce the operating temperature of the motor, achieve the effect of high-efficiency water cooling, and improve the heat dissipation effect of the water pump; by setting the recess 7, the gap and the water inlet hole 4, to form a cooling motor After the water returns to the flow channel in the volute 14, the temperature of the water after cooling the motor rises, and can be discharged from the water outlet 5 through the water outlet 21 together with other water flows to the outside of the water pump, or from the first gap 6 to the water cooling chamber again. Within 24, participate in the water cooling operation of the motor again. In the present invention, the volute 14 is provided with a water inlet 3, a water inlet hole 4, a connection position 8, a water outlet 5, a first notch 6, etc. With the matching connection, a conventional filtering water circuit and a water-cooling circulation main circuit for cooling the motor are formed. The water pump provides more than two circulating water circuits, and uses water cooling to cool the motor without installing a heat dissipation module, which simplifies the internal structure of the pump, reduces the cost of the pump, and enhances the heat dissipation effect of the motor.

In actual operation, as shown in FIG. 4 to FIG. 6 , the number of water inlet holes 4 is at least one. When the number of water inlet holes 4 is only one, the water cooling efficiency of the water cooling main circuit is low. Therefore, in this embodiment, the number of water inlet holes 4 is several, and each water inlet hole 4 is evenly distributed at equal intervals in the water inlet 3 with the axis of the water inlet 3 (it may also be the center of the water inlet 3) as the center. The outer circumference ensures that the water flowing from the gap to the vicinity of the water inlet 3 can enter the chamber 1 from all directions.

The water outlet 23 of the filter device 16 is structured as a cylindrical annular convex portion. In order to better connect with the filter device 16 , as shown in FIG. 5 , the connection position 8 is a recess for clearance fit with the water outlet end 23 of the filter device 16 , specifically, the recess is an annular recess. The concave portion is recessed toward the inner side of the volute 14 along the axial direction of the volute 14 , that is, in the direction toward the chamber 1 . The concave portion is connected to the annular convex portion of the filter device 16 to ensure that the volute 14 is connected to the filter device 16 . A clearance fit is adopted between the concave portion and the annular convex portion of the filter device 16 to form a gap through which the above-mentioned water supply flow passes, forming a complete main circuit of water cooling circulation. The water inlet hole 4 is arranged on the bottom side of the concave part, so that the water flow from the gap directly flows into the chamber 1 through the water inlet hole 4, so as to ensure the integrity of the main circuit of the water cooling cycle and shorten the water circuit. The volute 14 is provided with two rings of annular protrusions 9 along its axis direction out of the chamber 1 , and a concave portion is formed between the annular protrusions 9 . The axes of the two rings of annular protrusions 9 are located on the same straight line, and the water inlet hole 4 is located between the two rings of annular protrusions 9 . The distance between the two rings of annular protrusions 9 is greater than the width of the annular convex portion of the filter device 16 , so that the width of the concave portion is greater than the width of the annular convex portion, ensuring that the concave portion fits with the water outlet 23 of the filter device 16 to form a gap. By arranging two rings of annular protrusions 9 , a concave portion for positioning and connecting the filter device 16 can be formed on the outer side of the volute 14 without affecting the volume of the chamber 1 . The two rings of annular protrusions 9 can be clamped with the water outlet end 23 of the filter device 16 to ensure that the filter device 16 is installed at the water inlet 3 of the volute 14 .

The sum of the opening areas of the water inlet holes 4 is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the openings of the water inlet holes 4 are located. The ratio of the cross-sectional area of the water inlet hole 4 to the connection position 8 is the optimal ratio determined by the research and development personnel after repeated experiments. When the ratio of the opening area of the water inlet hole 4 to the cross-sectional area of the concave portion in the plane where the opening of the water inlet hole 4 is located is too small, the amount of water flowing out from the water cooling cavity 24 is small, resulting in the water flow rate of the water cooling main circuit being too slow, which is The efficiency of motor cooling is low. When the ratio of the opening area of the water inlet hole 4 to the cross-sectional area of the concave portion in the plane where the opening of the water inlet hole 4 is located is too large, the negative pressure effect generated by the rotation of the impeller 19 inside the volute 14 will be affected, and the water intake of the water pump will be affected. The amount of water in the filtration waterway is reduced, resulting in low efficiency of the water filtration cycle. Therefore, when the opening area of the water inlet hole 4 is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the opening of the water inlet hole 4 is located, the water inlet hole 4 can make the operation of the water filtration channel of the water pump not affected. As much water as possible after cooling the motor can flow back into the chamber 1 from the water inlet 4 to ensure that the temperature of the water in the water pump is not too high. In this embodiment, the water inlet hole 4 is a circular hole, and the diameter of the water inlet hole 4 is 2 mm˜6 mm. The spacing between the water inlet holes 4 is 5 mm to 15 mm. When the spacing between each water inlet hole 4 is less than 5mm, too many water inlet holes 4 are arranged on the volute 14, and the openings on the volute 14 are too many, which is easy to reduce the structural strength of the volute 14. In addition, the arrangement of the water inlet holes 4 is too dense, which will affect the effect of the impeller 19 to generate negative pressure, resulting in an excessively small amount of water in the water inlet 3 and reducing the amount of water in the filtered water channel. When the distance between each water inlet hole 4 is greater than 15mm, the amount of water flowing out of the water cooling space will be too small, and the circulation of the water cooling main circuit will be too slow, thereby reducing the efficiency of cooling the motor. Therefore, when the distance between the water inlet holes 4 is kept between 5mm and 15mm, the circulation efficiency of the main water cooling circuit can be improved as much as possible without affecting the flow of the filtering water circuit. Make the cooling of the motor as effective as possible.

The number of the first notches 6 is at least one. Preferably, the number of the first notches 6 is at least two, that is, more than two. The water located at the water outlet 5 can flow into the water-cooling cavity 24 more, thereby increasing the water volume in the main circuit of the water-cooling cycle and improving the cooling rate of the motor. In this embodiment, the number of the first notches 6 is two. In practical applications, the positions of the first notches 6 can be staggered. In this embodiment, the first notches 6 are symmetrically arranged on both sides of the water outlet 5, which can further increase the amount of water flowing out of the water outlet 5, increase the water flow of the first notches 6, and speed up the water circulation. The sizes of the two first notches 6 are the same. The opening area of one first notch 6 is 0.7 mm ² to 176 mm ² . When the opening of the first notch 6 is too small, the water flow rate of the first water channel is too small, which affects the water circulation effect of the water cooling circulation main circuit. When the opening of the first notch 6 is too large, the amount of water discharged from the water outlet 5 through the water outlet 21 is small, which affects the operation of the filtering water channel. When the opening area of the first notch 6 is in the range of 0.7 mm ² to 176 mm ² , the maximum flow rate of the water cooling circulation main circuit and the filtering water circuit can be ensured at the same time, and the water cooling circulation and water filtration efficiency can be accelerated.

Specifically, at least two connecting protrusions 10 extend along the radial direction of the outer circumference of the volute 14 , and recesses 7 are formed between the connecting protrusions 10 . Since the volute 14 is installed in the casing 15 and connected to the filter device 16 , in order to allow the water to flow back into the chamber 1 , there must be a second water flow channel between the volute 14 and the casing 15 through which the water flows. The connecting convex portion 10 is provided on the outer periphery of the volute 14 to form the concave position 7, which can leave a second water flow channel between the volute 14 and the casing 15 without affecting the volume of the chamber 1 to form a water cooling cycle. main road. The water in the water cooling chamber 24 can flow into the gap through the second water flow channel between the recess 7 and the housing 15 , enter the chamber 1 and the spiral flow channel 2 from the water inlet hole 4 , and flow from the water outlet through the water outlet 5 . 21 discharge.

As shown in FIGS. 4 and 7 , the volute 14 is provided with a limit slot 18 along its axial direction. The limit slot 18 is used to cooperate with the motor casing 17 , and the volute 14 is connected to the motor through the limit slot 18 . Shell 17 is attached. Specifically, the limit slot 18 is connected to the motor housing 17 by being clamped with the connector 26 . As shown in FIG. 3 , by setting the limit slot 18 , the coaxiality of the volute 14 , the connecting piece 26 and the motor housing 17 is ensured to be consistent. As shown in FIG. 4 , the number of limit slots 18 in this embodiment is several, and the plurality of limit slots 18 are evenly distributed on one side of the volute 14 close to the connecting piece 26 with the center of the water inlet 3 as the center superior. The limit slot 18 is composed of two limit protrusions 11 . The limiting protrusions 11 extend along the axial direction of the volute 14 , and the two limiting protrusions 11 are arranged side by side on the same straight line.

More specifically, as shown in FIG. 4 , the side of the volute 14 facing the motor is provided with a connecting pipe 12 . As shown in FIG. 7 , the connecting pipe 12 is provided on the second half-shell 142 . The shape of the connecting pipe 12 is cylindrical. In this embodiment, the first end of the connecting pipe 12 communicates with the chamber 1 , and the end face of the second end of the connecting pipe 12 is in contact with the motor casing 17 . By arranging the connecting pipe 12 , it is convenient for the manufacturer to position and install the volute 14 and the motor casing 17 . The above-mentioned main circuit of the water cooling cycle can cool down the motor, but there is still room for optimization in this solution. In order to speed up the circulation of water flow, as shown in Figs. A third water channel is formed between the second notch 13 and the inner wall of the motor housing 17 , and the third water channel communicates with the water cooling chamber 24 and the chamber 1 respectively. A part of the water in the water cooling cavity 24 can flow into the connecting pipe 12 from the second gap 13 . In order to speed up the water-cooling circulation, the water pump can also add a water-cooling circulation auxiliary circuit, so that a part of the water in the water-cooling cavity 24 flows into the water-cooling circulation auxiliary circuit, so as to increase the water-cooling circulation efficiency. By arranging the second gap 13, the third water flow channel constitutes a part of the auxiliary circuit of the water cooling cycle. The volute 14 can be installed on the water pump by setting the second gap 13 on the connecting pipe 12, so that the third water flow channel and other parts of the water pump can form a water cooling circulation auxiliary circuit, making full use of the filtered water to cool the motor, further Speed up the water circulation efficiency and increase the cooling rate.

In order to form a complete water-cooling circulation auxiliary circuit, as shown in FIG. 2 , the impeller 19 includes a connecting shaft 191, a wheel housing 192 and a blade 193. One end of the connecting shaft 191 passes through the motor casing 17 in turn and is connected to the motor, and the other connecting shaft 191 is connected to the motor. One end is connected to the blade 193 through the wheel housing 192 , the wheel housing 192 is installed in the chamber 1 , and the blade 193 is installed in the wheel housing 192 . The motor drives the connecting shaft 191 to rotate, and drives the blades 193 to rotate in the chamber 1 , so as to throw out the water in the chamber 1 to the water outlet 5 . As shown in FIG. 8 , the wheel housing 192 is provided with a flow through hole 25 , and the third flow channel communicates with the chamber 1 through the flow through hole 25 . The third flow channel constitutes another part of the water-cooled selected auxiliary circuit. The auxiliary water cooling circuit is as follows: a part of the water in the water cooling chamber 24 flows into the connecting pipe 12 through the second gap 13 , enters the wheel housing 192 through the water through hole 25 , is thrown out by the blades 193 , and is discharged from the water outlet 5 and the water outlet 21 .

Optionally, the opening area of one second notch 13 is 0.7 mm ² to 176 mm ² , which can improve the circulation efficiency of the water-cooling circulation auxiliary circuit without affecting the water intake of the water pump. When the opening area of the second notch 13 is less than 0.7 mm ² , the circulation efficiency of the water-cooling circulation auxiliary circuit is too low, and the effect of the water-cooling circulation auxiliary circuit is small. When the opening area of the second notch 13 is larger than 176 mm ² , the amount of water entering the connecting pipe 12 is relatively large, which easily affects the rotation of the impeller 19 and reduces the amount of water in the filtered water channel. In this embodiment, the width of the second notch 13 is 3 mm˜8 mm. Similarly, the number of the second notches 13 is at least two. If the number of the second gap 13 is only one, the amount of water in the auxiliary circuit of the water cooling circulation is small. If the number of the second notches 13 is more than two, it is easy to affect the water volume of the filtered water channel. In this embodiment, the number of the second notches 13 is two, and the second notches 13 are arranged symmetrically along the axis of the connecting pipe 12, so as to increase the passage of the water-cooling circulation auxiliary circuit as much as possible without affecting the filtering water circuit. water volume.

Similarly, the size of the opening area of one flow through hole 25 is 0.7 mm ² to 315 mm ² . When the opening area of the water through hole 25 is greater than 315 mm ² , the negative pressure effect generated when the impeller 19 rotates becomes smaller, which affects the water intake of the pump. The shape of the water through hole 25 is not limited. When the opening area of the water flow through hole 25 is less than 0.7 mm ² , the water flow rate of the water cooling circulation auxiliary circuit is too small. The width of the flow through hole 25 in this embodiment is 3 mm˜8 mm. The number of the water through holes 25 is one, preferably two. When the number of the water through holes 25 is more than two, the water through holes 25 are evenly arranged on the wheel housing 192 to increase the water flow, so that the water flow can symmetrically flow through the wheel housing 192 and be thrown out by the blades 193 5 water outlets. When the number of the water flow through holes 25 is two, the water flow through holes 25 are symmetrically arranged along the axis of the connecting pipe 12 .

Further, as shown in FIG. 1 , FIG. 2 and FIG. 9 , the motor casing 17 includes an outer casing 171 and an inner casing 172 installed in the outer casing 171 , a water cooling cavity 24 is formed between the inner casing 172 and the outer casing 171 , and the motor is installed in the outer casing 171 . Inside the inner shell 172 . The inner casing 172 is used to mount motor components such as rotors and stators. In this embodiment, the shapes of the outer shell 171 and the inner shell 172 are cylindrical, and the inner diameter of the outer shell 171 is larger than the inner diameter of the inner shell 172, which is convenient for putting the assembled inner shell 172 into the outer shell 171. The outer shell 171 is sleeved outside the inner shell 172 and forms a hollow structure with the inner shell 172 . The axes of the inner shell 172 and the outer shell 171 are the same straight line, forming an annular water cooling cavity 24 . In the present invention, the motor casing 17 is divided into two parts: the outer casing 171 and the inner casing 172. When placing the motor, only a specific part of the inner casing 172 needs to be heated. The heating device is small in size and light in weight. Compared with the prior art, it is more effective The heating time is shortened, and the assembly of the motor is more convenient and quick, thus fully improving the assembly efficiency of the water pump motor. The housing 171 is connected to the housing 15 . The volute 14 is located between and connected to the filter device 16 and the housing 171 .

Furthermore, the water pump further includes an electric control module (not shown in the figure) electrically connected with the motor. The electronic control module includes a circuit board that is electrically connected to the motor and used to drive the motor, and a heat sink connected to the circuit board. As shown in FIG. 2 , the motor housing 171 is provided with a mounting position 27 for installing the circuit board and the heat sink, and the electric control module is mounted on the top of the housing 171 . The installation position 27 is provided with an aluminum electric control seat, and the heat sink is installed on the housing 171 through the electric control seat. The heat of the heat sink is conducted to the outer shell 171 through the electric control seat, and the heat generated by the motor is conducted to the inner shell 172 . The water in the water cooling chamber 24 lowers the temperature of the outer shell 171 and the inner shell 172, takes away the heat generated by the heat sink and the motor, achieves the effect of cooling, and greatly improves the service life of the whole motor.

More preferably, as shown in FIG. 9 and FIG. 11 , the end of the inner casing 172 away from the volute 14 is an open end, and the open end is provided with an annular side plate 33 extending outward, and the annular side plate 33 is in contact with the inner wall of the outer casing 171 . . By arranging the annular side plate 33 at the open end of the inner shell 172 for positioning and installation, the outer shell 171 and the inner shell 172 form a water cooling cavity 24, which has a cooling effect. During the assembling process, the inner shell 172 can be quickly heated by a heating tool commonly used in the industry to make it expand by heat. The annular side plate 33 can ensure that no deformation occurs during the expansion process, and the hollow space of the inner shell 172 will be enlarged due to thermal expansion. The motor parts such as the rotor and stator of the motor can be quickly put into the motor, and then the assembled inner shell 172 can be positioned and installed in the inner cavity of the outer shell 171 through the annular edge plate 33 at its open end, which reduces the difficulty of installation and greatly improves the assembly efficiency. .

Further, the outer wall of the inner shell 172 and the inner wall of the outer shell 171 are provided with an anti-oxidation coating. The anti-oxidation coating includes deposition of anti-oxidation materials, Teflon coatings, deposition of ceramic materials or secondary molding of plastic materials, etc. The main purpose is to prevent water from corroding the inner and outer surfaces of the motor housing 17 to ensure its service life.

Further, as shown in FIG. 9 , the inner wall of the outer shell 171 is provided with a stepped surface 28 that expands outward, and the outer edge of the annular side plate 33 abuts against the stepped surface 28 to realize the positioning and installation of the inner shell 172, so that the inner shell 172 A water cooling cavity 24 is formed between the casing 171 . The stepped surface 28 is also in the shape of a ring, and is in contact with the annular side plate 33 for a whole circle, isolating the water-cooling cavity 24 and preventing the cooling water of the water-cooling cavity 24 from flowing into the open end of the casing 171 .

Preferably, as shown in FIG. 9 and FIG. 10 , the motor casing 17 further includes a cover plate 29 encapsulating the casing 171 . The cover plate 29 is detachably connected to the casing 171 . In this embodiment, the cover plate 29 and the casing 171 are screwed together. way to connect. The cover plate 29 is provided with a pressure plate 30 for pressing the annular edge plate 33 against the stepped surface 28 . The outer shell 171 is a hollow cylindrical space with an opening at one end, the stepped surface 28 is set at the opening position, and the cover plate 29 is also installed at the opening position. In contact with each other, the pressing plate 30 abuts the front surface of the annular side plate 33 , so that the annular side plate 33 is fixed and pressed on the stepped surface 28 of the housing 171 .

In this embodiment, as shown in FIG. 9 , the cover plate 29 is further provided with a limiting plate 31 abutting against the inner wall of the inner shell 172 . The limit plate 31 extends from the open end of the inner shell 172 to the interior of the inner shell 172, and a part of the side surface of the limit plate 31 abuts against the inner wall of the inner shell 172 to clamp the inner shell 172 to achieve positioning, which can avoid the inner shell. 172 swing dislocation and affect the assembly accuracy. Wherein, the pressure plate 30 and the limit plate 31 are both in the shape of a ring, the pressure plate 30 presses the whole ring of the annular side plate 33 to avoid moving forward and backward, and the limit plate 31 can clamp the entire open end of the inner shell 172 to avoid moving up and down, so as to realize Fixed installation of inner shell 172.

In this embodiment, the annular side plate 33 is provided with an annular groove 32, and the annular groove 32 can be formed by a stamping process to strengthen the annular side plate 33 and improve the stability of the overall structure.

The inner shell 172 is made of iron material, the outer shell 171 is made of aluminum material with a lighter weight, and an iron material with a lower specific heat capacity than aluminum is used as the inner shell 172, and the time required to increase the same temperature is longer than that of the same temperature. The volume of the aluminum casing 15 is lower, which further improves the heating efficiency, and because the iron material has a lower cost than the aluminum material, it is beneficial to reduce the production cost. Since the body 15 of the inner shell 172 to be heated is small in size and light in weight, the tools for heating the inner shell 172 do not need to be customized, which fully reduces the production cost of the equipment, and the heating time is short, the heating efficiency is higher, and the installation of the motor components More convenient and efficient.

The water pump of the present invention has three circulating water paths, which are:

Filtration water circuit: The motor drives the connecting shaft 191 to drive the blades 193 to rotate, the impeller 19 rotates to generate negative pressure, the water outside the water pump is sucked into the filter device 16, and enters the filter basket from the first feed end 20 through the second feed end 22 middle. The filtered water enters the water inlet 3 from the water outlet 23 and enters the chamber 1 of the volute 14 . Under the rotation of the impeller 19, the water is thrown out to the water outlet 5 along the spiral flow channel 2, and a part of the water in the water outlet 5 flows out from the water outlet 21 to realize water filtration.

Water cooling main circuit: when the water in the filtered water circuit is thrown out of the water outlet 5, a part of the water flows out from the first gap 6 and enters the water cooling cavity 24. Since the water-cooling chamber 24 is connected to the first water passage, under the pressure of the negative pressure generated by the rotation of the impeller 19, a part of the water from the water-cooling chamber 24 passes through the recess 7 and the gap in turn, flows into the chamber 1 from the water inlet hole 4, and flows into the chamber 1 through the water inlet hole 4. It is thrown out to the water outlet 5 by the impeller 19 .

At the same time, a small part of the water in the water outlet 5 also flows out from the first gap 6 on the water outlet 5, and enters the gap together with the water in the water cooling cavity 24 along the first flow channel and the second flow channel, and again It is thrown out to the water outlet 5 by the impeller 19 . The function of the water-cooling circulation main circuit is to accelerate the water circulation and improve the water-cooling efficiency.

Water-cooling circulation auxiliary circuit: a small part of the water in the water-cooling cavity 24 passes through the second gap 13, enters the interior of the connecting pipe 12, enters the wheel housing 192 through the water through hole 25, is thrown out by the blades 193, and passes through the spiral flow channel 2. Nozzle 5 flows out.

To sum up, a large part of the water located in the water outlet 5 flows out from the water outlet 21 , and a small part flows out from the first gap 6 and enters the water cooling cavity 24 . Part of the water in the water-cooling cavity 24 passes through the recess 7 and the gap and enters the water-cooling circulation main circuit, and the other part passes through the second gap 13 and enters the water-cooling circulation auxiliary circuit.

By arranging specific notches and openings on the volute 14, holes are also opened on the impeller 19, and the size of the holes is limited. The size of the holes of the volute 14 and the impeller 19 can make the water-cooling circulation main circuit and the water-cooling circulation auxiliary circuit under the premise of ensuring the efficiency of the water filtration cycle, which effectively improves the speed of the water circulation and realizes the use of the water to cool the motor and circuit board. Effect. The combined action of the main and auxiliary circuits makes the water in the water-cooling chamber 24 continuously updated, preventing the water heated by the motor from being unable to be updated in time due to the slow water flow rate, and the problem of poor heat dissipation, which fully improves the water-cooling heat dissipation efficiency. Therefore, the defects of high noise and high manufacturing cost of the water pump caused by heat dissipation by the fan are avoided, so that the water pump of the present invention is quieter and smaller in size.

To sum up, the embodiments of the present invention provide a water pump, in which a connection position is provided on the outer periphery of the water inlet of the volute casing to be matched with the water outlet end of the filter device, so that there is a gap between the connection position and the water outlet end for the water flow to pass through. . By providing a first notch at the water outlet of the volute, a first water flow channel is formed between the first notch and the casing. By providing a concave portion on the outer periphery of the volute, a second water flow channel is formed between the concave portion and the casing. When the pump is working, the impeller rotates in the chamber to form negative pressure, and the material is sucked into the pump. After the material passes through the filter device, it enters the chamber of the volute and the spiral flow channel in turn from the water inlet, and is thrown out by the impeller to the water outlet. The water located in the other part of the water outlet enters the water cooling chamber through the first gap to cool the motor, absorbs the heat of the motor, enters the chamber and the spiral flow channel from the recess through the gap and the water inlet hole, and is discharged from the water outlet and the water outlet. Complete the water cooling cycle. By opening holes and recesses at specific positions of the volute, the water pump is formed with two water circuits, a filtering water circuit and a water-cooling circulation main circuit, during operation. The water is used to cool the motor, and there is no need to install a heat sink for the motor. A better heat dissipation effect of the water pump is achieved, and the cost of the water pump is effectively reduced.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims

A water pump, characterized in that it comprises a casing, a filter device, a motor casing, a motor, a volute, and an impeller;

Both the filtering device and the volute are installed in the casing, and the casing is provided with a first feeding end and a water outlet;

The filter device is provided with a second feed end and a water outlet, and the second feed end communicates with the first feed end;

the motor housing is connected with the housing, and the motor housing is provided with a water cooling cavity;

The volute is located between the filter device and the motor casing, and the volute is connected to the filter device and the motor casing respectively, and the volute is provided with a chamber and is connected to the chamber. The chamber has a water inlet and a water inlet hole arranged on the outer periphery of the water inlet, and the water inlet and the water inlet hole are both communicated with the water outlet. The outer periphery is also provided with a connection position connected to the water outlet, a gap is formed between the connection position and the water outlet, the spiral flow channel has a water outlet communicated with the water outlet, and the water outlet is provided with a gap. There is a first gap, a first water channel is formed between the first gap and the inner wall of the casing, the first water channel is communicated with the water cooling cavity, and the outer circumference of the volute is provided with a recess, so A second water flow channel is formed between the recess and the inner wall of the housing, and the second water flow channel is respectively communicated with the water cooling cavity and the gap;

One end of the impeller is connected to the motor, and the other end of the impeller is located in the chamber;

In the working state, the material enters the filtering device from the first feeding end through the second feeding end, and the filtered water enters the water inlet from the water outlet, and passes through the chamber and the water inlet. The spiral flow channel enters the water outlet, a part of the water in the water outlet is discharged through the water outlet, and the other part of the water in the water outlet passes from the first gap along the first water channel Enter the water cooling chamber, then enter the gap along the second water flow channel through the recess, and enter the chamber and the spiral flow channel through the water inlet hole, and flow from the water outlet through the water outlet. The water outlet is discharged.
The water pump according to claim 1, wherein the number of the water inlet holes is several, and each of the water inlet holes is evenly distributed on the outer circumference of the water inlet.
The water pump according to claim 1, wherein the connection position is a concave portion recessed inward along the axial direction of the volute, the concave portion is in clearance fit with the water outlet end, and the water inlet hole is provided at on the recess.
The water pump according to claim 3, wherein the volute is provided with two rings of annular protrusions outward along the axial direction thereof, and the concave portion is formed between the annular protrusions.
The water pump according to claim 3, wherein the sum of the opening areas of the water inlet holes is 10% to 50% of the cross-sectional area of the concave portion located in the plane where the opening of the water inlet holes is located.
The water pump of claim 1, wherein the number of the first notches is at least two.
The water pump according to claim 6, wherein each of the first notches is symmetrically arranged on both sides of the water outlet.
The water pump according to claim 1, wherein the opening area of the first notch is 0.7 mm 2 to 176 mm 2 .
The water pump according to claim 1, wherein the outer circumference of the volute is extended with at least two connecting protrusions along its radial direction, and the concave position is formed between the connecting protrusions.
The water pump according to claim 1, wherein the volute is provided with a limit slot matched with the motor casing along its axial direction, and the volute is connected to the volute through the limit slot. connection to the motor housing.
The water pump according to claim 1, characterized in that, a side of the volute facing the motor is provided with a connecting pipe, the first end of the connecting pipe is communicated with the chamber, and the connecting pipe is The end face of the second end portion is in contact with the motor case.
The water pump according to claim 11, wherein a second notch is provided on the second end of the connecting pipe, the second notch is recessed along the axis direction of the connecting pipe, and the second notch is the same as the axis of the connecting pipe. A third water flow channel is formed between the inner walls of the motor casing, and the third water flow channel is communicated with the water cooling chamber and the chamber respectively.
The water pump according to claim 12, wherein the opening area of the second notch is 0.7 mm 2 to 176 mm 2 .
The water pump of claim 12, wherein the number of the second notches is at least two.
The water pump according to claim 14, wherein each of the second notches is symmetrically arranged along the axis of the connecting pipe.
The water pump according to claim 12, wherein the impeller comprises a connecting shaft, a wheel housing and a blade, one end of the connecting shaft is connected to the motor through the motor housing in sequence, and the connecting shaft is connected to the motor. The other end is connected to the blade through the wheel shell, the wheel shell is located in the cavity, the blade is installed in the wheel shell, the wheel shell is provided with a water through hole, and the third The water flow channel communicates with the chamber through the water flow through hole.
The water pump according to claim 16, wherein the size of the opening area of the water through hole is 0.7 mm 2 to 315 mm 2 .
The water pump according to claim 16, wherein when the number of the water flowing through holes is two or more, each of the water flowing through holes is evenly arranged on the wheel housing.
The water pump according to any one of claims 1-18, wherein the motor casing comprises an outer casing and an inner casing installed in the outer casing, and the outer casing and the inner casing are formed with the In a water cooling chamber, the motor is installed in the inner casing, the outer casing is connected with the casing, and the volute is located between the filter device and the outer casing and is connected with the outer casing.
The water pump of claim 19, further comprising an electric control module electrically connected to the motor, the electric control module being mounted on the housing.
The water pump according to claim 19, wherein the end of the inner casing away from the volute is an open end, the open end is provided with an annular edge plate extending outward, and the annular edge plate is connected to the The inner walls of the casing are in contact with each other.
The water pump of claim 21, wherein an anti-oxidation coating is provided on the outer wall of the inner casing and the inner wall of the outer casing.
The water pump according to claim 21, wherein the inner wall of the casing is provided with a stepped surface that expands outward, and the outer edge of the annular side plate abuts against the stepped surface.
The water pump according to claim 23, wherein the motor casing further comprises a cover plate, the cover plate is detachably connected to the casing, and the cover plate is provided with a cover plate for pressing the annular edge plate A pressure plate on the stepped surface.
The water pump according to claim 24, wherein the cover plate is further provided with a limit plate abutting against the inner wall of the inner shell, and the stepped surface, the pressing plate and the limit plate are all formed in the same shape as the limit plate. Ring shape.