CN218920190U - Motor cooling structure, cooling system and spraying equipment of spraying equipment - Google Patents

Abstract

The utility model discloses a motor cooling structure and a cooling system of spraying equipment. The motor cooling structure comprises a motor, an atomizing disk and a water cooling piece. The motor comprises a main body and a driving shaft extending from the main body; the atomizing disk is arranged on the driving shaft; the water cooling piece is sleeved on the main body and is provided with a water cooling channel, a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the water cooling channel. In the motor cooling structure of the spraying device, the motor provides centrifugal force for the atomizing disk through the driving shaft, so that the atomizing disk can atomize feed liquid under the driving of the centrifugal force, and in the running process of the motor, the water cooling piece provides a cooling function for the motor, so that the motor can normally run at a proper temperature, and the normal production of spraying equipment is ensured.

Description

Motor cooling structure, cooling system and spraying equipment of spraying equipment

Technical Field

The utility model relates to the technical field of spraying machines, in particular to a motor cooling structure of spraying equipment, a cooling system and the spraying equipment.

Background

The spraying machine is special coating equipment adopting spraying technology, and the principle is that the air flow is controlled to instantly push the air distribution reversing device to reverse, so that the piston of the pneumatic motor can perform stable continuous reciprocating motion. The applicator is typically driven by a motor and is typically an all-weather operating device, and therefore generates a lot of heat during use, especially when the motor power is too high, the motor is prone to overheat failure, which results in the applicator being stopped, and thus the production being stopped, and therefore the motor of the applicator needs to be cooled.

Disclosure of Invention

The utility model provides a motor cooling structure of spraying equipment, a cooling system and the spraying equipment.

The motor cooling structure of the spraying device of the embodiment of the utility model comprises:

a motor including a main body and a drive shaft extending from within the main body;

an atomizing disk mounted on the drive shaft; and

the water cooling piece is sleeved on the main body and is provided with a water cooling channel, a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the water cooling channel.

In the motor cooling structure of the spraying device, the motor provides centrifugal force for the atomizing disk through the driving shaft, so that the atomizing disk can atomize feed liquid under the driving of the centrifugal force, and in the running process of the motor, the water cooling piece provides a cooling function for the motor, so that the motor can normally run at a proper temperature, and the normal production of spraying equipment is ensured.

In certain embodiments, the central axis of the water inlet and the central axis of the water outlet coincide.

In certain embodiments, the water-cooled channel is disposed in isolation from the body.

In some embodiments, the water cooling member includes an inner annular wall, an outer annular wall, a top wall and a bottom wall, the outer annular wall surrounds the inner annular wall, the top wall connects the inner annular wall and the outer annular wall, the bottom wall connects the inner annular wall and the outer annular wall, the inner annular wall, the outer annular wall, the top wall and the bottom wall enclose the water cooling channel together, and the inner annular wall is sleeved on the main body.

In certain embodiments, the water inlet and the water outlet are both provided on the outer annular wall.

In some embodiments, the water inlet and the water outlet are each provided with a water connection.

In certain embodiments, the cross-section of the body is square, and the axial dimension of the body is greater than the axial dimension of the water cooling member.

The cooling system of the embodiment of the utility model comprises the motor cooling structure of the spraying device of any embodiment.

In some embodiments, the cooling system further comprises a water pump for feeding cold water to the water inlet, and a cooling device for exchanging heat with water flowing from the water outlet, the water pump, the cooling device and the water cooling element being connected in series.

The spray coating device of an embodiment of the utility model comprises a cooling system according to any of the embodiments above.

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

fig. 1 is a schematic structural view of a motor cooling structure according to an embodiment of the present utility model;

FIG. 2 is a full cross-sectional view of the motor cooling structure of FIG. 1 in the A-direction;

FIG. 3 is a schematic view of a water cooling member according to an embodiment of the present utility model;

FIG. 4 is a full cross-sectional view in the B direction of the water cooling member of FIG. 3;

FIG. 5 is a schematic view of the structure of a spray coating device according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a portion of a spray coating device according to an embodiment of the utility model, partially disassembled;

FIG. 7 is a schematic diagram of the connection of a cooling system according to an example of an embodiment of the utility model;

fig. 8 is a schematic diagram showing a connection relationship of a cooling system according to another embodiment of the present utility model.

Description of main reference numerals: a spraying apparatus 1000; a motor cooling structure 100; a motor 10; an atomizing disk 20; a water cooling member 30; a main body 11; a drive shaft 13; a water cooling passage 31; a water inlet 32; a water outlet 33; a coupling 40; an inner annular wall 34; an outer annular wall 35; a top wall 36; a bottom wall 37; a water pipe fitting 50; a cover structure 38; a cooling system 1100; a water pump 1101; a cooling device 1103; a heat exchange tube 1104; a fan 1105; a water tank 1107.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 5, a motor cooling structure 100 of a spray coating device 1000 according to an embodiment of the present utility model includes a motor 10, an atomizing disk 20, and a water cooling member 30. The motor 10 includes a main body 11 and a driving shaft 13 extending from the inside of the main body 11; the atomizing disk 20 is mounted on the drive shaft 13; the water cooling member 30 is sleeved on the main body 11 and is provided with a water cooling channel 31, a water inlet 32 and a water outlet 33, and the water inlet 32 and the water outlet 33 are communicated with the water cooling channel 31.

In the motor cooling structure 100 of the spraying device according to the embodiment of the utility model, the motor 10 provides centrifugal force for the atomizing disk 20 through the driving shaft 13, so that the atomizing disk 20 can atomize feed liquid under the driving of the centrifugal force, and the water cooling member 30 provides cooling function for the motor 10 in the operation process of the motor 10, so that the motor 10 can normally operate at a proper temperature, thereby ensuring the normal production of the spraying equipment 1000.

Specifically, the model of the motor 10 may be any model on the market, or may be a customized model. The shape of the main body 11 may be square or cylindrical, and the embodiment of the present utility model is not limited to the specific shape of the main body 11, the driving shaft 13 may be integrally formed with the main body 11, and the driving shaft 13 may be fixedly connected with the main body 11 by welding, bolting, keying, or the like. The materials of the driving shaft 13 and the main body 11 may be metal, and particularly, high-strength and high-density metal.

The atomizing disk 20 may be mounted on the drive shaft 13 by welding, bolting, interference connection, or the like, or may be engaged with the drive shaft 13 by the coupling 40. The coupling 40 can play roles in buffering, damping and improving the dynamic performance of a shaft system, and meanwhile, the coupling 40 is used for connecting the motor 10 so as to weaken the starting force of the motor 10 when the motor 10 is started, thereby preventing the feed liquid in the atomizing disk 20 from being splashed. The coupling 40 can be installed on one side of the motor 10, which is close to the atomizing disk 20, the coupling 40 can be sleeved on the driving shaft 13 of the motor 10, and the coupling 40 can be fixedly connected with the atomizing disk 20 in a bolt connection, a clamping connection and the like.

The higher the dispersion of the atomizing disk 20, the greater the drying efficiency; the more uniform the atomization, the less the variation in moisture content of the product. Therefore, the atomizing disk 20 is required to ensure the dispersion degree of the feed liquid and to minimize the variation of the particle size. Further, the atomizing disk 20 needs to ensure that the centrifugal force applied is stabilized within a range, so that stable operation of the motor 10 is required, and the overheat fault is one of factors causing the functional failure of the motor 10, so that the motor 10 needs to be cooled by the water cooling member 30.

The water cooling piece 30 can be sleeved on the main body 11 of the motor 10 and rotate together with the main body 11, so that the contact part of the water cooling piece 30 and the main body 11 can be tightly attached to the main body 11, and the water cooling piece 30 and the main body 11 can be in interference connection so as to ensure the connection strength in the running process of the motor 10. The water cooling member 30 may be made of metal, so that heat transfer between the water cooling member 30 and the main body 11 may be heat conduction between solids, so as to obtain a better cooling effect.

The main body 11 of the motor 10 may be closely attached to the water cooling member 30, so that heat generated when the motor 10 is operated may be transferred to the water cooling member 30. In operation, the cooling liquid enters the water cooling channel 31 through the water inlet 32, circulates in the water cooling channel 31 to transfer heat generated in the operation process of the motor 10, and flows out of the water cooling member 30 from the water outlet 33, so that the temperature of cooling water flow in the water cooling channel 31 is ensured, or the temperature of water flow in the water cooling channel 31 is always lower than the temperature of the contact part of the water cooling member 30 and the main body 11, so that the heat transfer efficiency is ensured.

Referring to fig. 2 and 4, in some embodiments, the central axis of the water inlet 32 and the central axis of the water outlet 33 coincide.

In this way, in the case where the supply of the cooling liquid is continued, the liquid level of the cooling liquid can be maintained always below the water inlet 32 and the water outlet 33, and the motor 10 can be sufficiently cooled.

Specifically, the central axis of the water inlet 32 and the central axis of the water outlet 33 coincide, or the water inlet 32 and the water outlet 33 are arranged at the same height, so that natural circulation of cooling liquid in the water cooling channel 31 can be ensured, meanwhile, the water cooling channel 31 can be ensured to always contain the cooling liquid, so that the water cooling piece 30 can uninterruptedly cool the motor 10, and it can be understood that when the cooling liquid cannot be continuously supplied due to external factors, the water flow in the cooling channel cannot be directly discharged due to the fact that the water inlet 32 and the water outlet 33 are arranged at the same height, and a certain safety time is reserved, or when the cooling liquid is insufficient, a time for processing by early warning personnel can be reserved.

Referring to fig. 1 and 2, in some embodiments, the water cooling channels 31 are isolated from the main body 11.

In this way, the cooling liquid in the water cooling channel 31 does not directly contact the surface of the main body 11, and the cooling liquid is prevented from corroding the motor 10.

Specifically, the water cooling member 30 may be configured as a cavity structure, the water cooling channel 31 may be disposed in a cavity portion of the cavity, the water cooling member 30 contacts the main body 11 through a wall surface of the cavity structure, or, heat generated during operation of the motor 10 is conducted between solids through the main body 11 and the wall surface of the cavity structure of the water cooling member 30, and meanwhile, the wall surface is cooled by cooling liquid in the water cooling channel 31, so as to achieve the purpose of cooling the motor 10 without directly contacting the motor 10.

Referring to fig. 1 and 2, in some embodiments, the water cooling member 30 includes an inner annular wall 34, an outer annular wall 35, a top wall 36 and a bottom wall 37, the outer annular wall 35 surrounds the inner annular wall 34, the top wall 36 connects the inner annular wall 34 and the outer annular wall 35, the bottom wall 37 connects the inner annular wall 34 and the outer annular wall 35, the inner annular wall 34, the outer annular wall 35, the top wall 36 and the bottom wall 37 together enclose the water cooling channel 31, and the inner annular wall 34 is sleeved on the main body 11.

In this way, the water flow channel of the water cooling member 30 is a cavity structure surrounded by the inner annular wall 34, the outer annular wall 35, the top wall 36 and the bottom wall 37, and the cooling liquid can flow in the water cooling channel 31 and cool the motor 10 without directly contacting the motor 10.

Specifically, the inner annular wall 34 and the outer annular wall 35 of the water cooling member 30 may be disposed opposite to each other, and the top wall 36 and the bottom wall 37 of the water cooling member 30 may be disposed opposite to each other, or, in other words, the inner annular wall 34 and the outer annular wall 35 of the water cooling member 30 are projected on the same plane along the radial direction of the water cooling member 30, and the top wall 36 and the bottom wall 37 of the water cooling member 30 are projected on the same plane along the axial direction of the water cooling member 30. The outer annular wall 35 may surround the inner annular wall 34 along the outer circumference of the inner annular wall 34, or the outer annular wall 35 may at least partially serve as an offset surface for the inner annular wall 34. The top wall 36 connects one side of the inner annular wall 34 and the outer annular wall 35, the bottom wall 37 connects the other side of the inner annular wall 34 and the outer annular wall 35, or the width of the top wall 36 is the offset of the outer annular wall 35 relative to the inner annular wall 34, similarly, the width of the bottom wall 37 is the offset of the outer annular wall 35 relative to the inner annular wall 34, and the widths of the top wall 36 and the bottom wall 37 can be consistent, thus being beneficial to manufacturing and shaping the water cooling channel 31, and reducing the manufacturing cost of the water cooling member 30.

The inner annular wall 34, the outer annular wall 35, the top wall 36 and the bottom wall 37 together enclose the water cooling channel 31, the inner annular wall 34 is sleeved on the main body 11 to form heat conduction among solids, and the water outlet 33 and the water inlet 32 can be respectively arranged on two sides of the water cooling channel 31 or on the same side of the water cooling channel 31. The water outlet 33 and the water inlet 32 are communicated with the water cooling channel 31, the water outlet 33 and the water inlet 32 are arranged on two sides of the water cooling channel 31, so that larger independent space can be obtained, communication of the water cooling piece 30 and other water cooling structures is facilitated, the sizes of the water outlet 33 and the water inlet 32 are adapted to the heating value of the motor 10 in actual operation, and the motor 10 with different powers can be adjusted.

Referring to fig. 1, 4 and 6, in some embodiments, both the water inlet 32 and the water outlet 33 are provided on the outer annular wall 35.

In this way, the water inlet 32 and the water outlet 33 are easy to manufacture, and the production cost can be saved.

Specifically, the water outlet 33 and the water inlet 32 may be manufactured by punching the outer circumferential wall 35. When the water outlet 33 and the water inlet 32 are arranged at the same height, the water outlet 33 and the water inlet 32 can be formed by one-step punching, so that the manufacturing cost is saved. Meanwhile, the water inlet 32 and the water outlet 33 are arranged on the outer annular wall 35, so that the layout of other parts of the motor cooling structure 100 of the spraying equipment 1000 is not affected, and the parts can be easily assembled and disassembled.

Referring to fig. 1, 3 and 4, in some embodiments, both the water inlet 32 and the water outlet 33 are provided with water fittings 50.

In this way, the hydraulic pressure and the flow rate of the liquid at the water inlet 32 and the water outlet 33 can be adjusted.

Specifically, the water pipe connector 50, the water inlet 32 and the water outlet 33 can be in a threaded connection or a key connection mode, the threaded connection is beneficial to disassembly and assembly, and the key connection can be used for obtaining better connection strength. The water connection 50 may be a universal connection to accommodate different types of water pipes. The water connection 50 may also be customized to achieve a desired cooling fluid flow rate based on actual demand to meet the cooling demands of different power motors 10.

Referring to fig. 1 to 3 and 5, in some embodiments, the cross section of the main body 11 is square, and the axial dimension of the main body 11 is larger than that of the water cooling member 30.

Thus, the motor 10 and the water cooling member 30 are not easy to rotate relatively, the connection strength between the motor 10 and the water cooling member 30 is ensured, or the water cooling member 30 cannot be separated from the motor 10 when the motor 10 works, so that the cooling function is invalid or safety accidents occur.

Specifically, the cross section of the main body 11 may be square, and the cross section of the outer annular wall 35 of the corresponding water cooling member 30 may also be square, so that the square cross section matching can obtain higher connection strength than the circular cross section matching in the limiting structure. Since there is no frequent disassembly and assembly requirement between the water cooling member 30 and the motor 10, the axial dimension of the main body 11 may be set to be larger than that of the water cooling member 30 to form an interference fit connection having a higher connection strength than the clearance fit connection and the transition fit connection.

In one embodiment, the water cooling member 30 may include a cover structure 38, wherein an upper wall surface of the cover structure 38, that is, a bottom wall 37 of the water cooling member 30, may be sleeved on the bottom of the main body 11 and receive the inner annular wall 34, so that the cooling liquid below the liquid level of the water inlet 32 and the water outlet 33 may be discharged from the water cooling channel 31.

When the spraying apparatus 1000 is stopped, the cooling liquid flowing in from the water inlet 32 is cut off, so that the circulation of the cooling liquid in the water cooling channel 31 is interrupted, impurities may be deposited on the cooling liquid, and the subsequent water cooling channel 31 is blocked due to no cleaning, so that the function of the water cooling member 30 is disabled. Similarly, during long-term operation of the spray coating device 1000, the cooling liquid may also deposit impurities, which may cause blockage of the subsequent water cooling passages 31 without cleaning, thereby causing the water cooling member 30 to fail.

Referring to fig. 1, 6 and 7, a cooling system 1100 according to an embodiment of the present utility model includes the motor cooling structure 100 of the spraying apparatus 1000 according to any of the above embodiments.

In this way, the motor cooling structure 100 of the spraying apparatus 1000 in the cooling system 1100 provides the heat dissipation function for the motor 10 locally, and the cooling system 1100 provides the overall heat dissipation function for the spraying apparatus 1000.

Specifically, the motor cooling structure 100 of the spraying apparatus 1000 is disposed at a position where the cooling system 1100 approaches the motor 10, or, the cooling system 1100 locally provides a heat dissipation function to the motor 10 through the motor cooling structure 100. The spraying apparatus 1000 may include a plurality of motors 10, the cooling system 1100 may include a plurality of motor cooling structures 100, the motors 10 and the motor cooling structures 100 may be in one-to-one correspondence, and the plurality of motor cooling structures 100 may be disposed in parallel or in series.

Referring to fig. 4, 7 and 8, in some embodiments, the cooling system 1100 further includes a water pump 1101 and a cooling device 1103, where the water pump 1101, the cooling device 1103 and the water cooling member 30 are connected in series, the water pump 1101 is used to send cold water to the water inlet 32, and the cooling device 1103 is used to exchange heat with water flowing from the water outlet 33.

In this way, a greater flow of cooling liquid is achieved by the water cooling 30 in series with the water pump 1101 and the cooling device 1103, thereby creating a stable cooling liquid circulation between the water cooling 30 and the water pump 1101 and the cooling device 1103.

Specifically, the water pump 1101 and the cooling device 1103 may be disposed on different sides of the water cooling member 30, respectively, or may be disposed on the same side of the water cooling member 30, depending on the positions of the water inlet 32 and the water outlet 33 of the water cooling member 30 and the surrounding arrangeable space.

The cooling liquid fed by the water pump 1101 enters the water cooling passage 31 and contacts the inner annular wall 34 of the water cooling member 30, thereby transferring heat transferred from the main body 11 to the inner annular wall 34 for cooling the motor 10. Part of the cooling liquid flows out from the water outlet 33, and after the cooling liquid in the water cooling channel 31 circulates, the cooling liquid at the moment may have a certain temperature, and at this moment, the cooling liquid flowing out of the water outlet 33 can be subjected to heat exchange through the cooling device 1103.

Referring to fig. 4 and 7, in one embodiment, the cooling device 1103 may include a heat exchange tube 1104 and a fan 1105, the cooling liquid passing through the water cooling channel 31 may exchange heat through the heat exchange tube 1104, and the cooling liquid after heat exchange is re-pumped from the cooling system 1100 by the water pump 1101 and re-sent to the water inlet 32 of the water cooling member 30, so as to achieve the purposes of saving cost and protecting environment. In addition, the fan 1105 can quickly dissipate heat of the heat exchange tube 1104, so that the heat exchange efficiency of the heat exchange tube 1104 is improved.

Referring to fig. 4 and 8, in another embodiment, the cooling device 1103 may include a water tank 1107 and a fan 1105, with a volume of cooling liquid held in the water tank 1107. The cooling liquid passing through the water cooling channel 31 reaches the cooling device 1103 and flows into the water tank 1107 to exchange heat with the cooling liquid standing in the water tank 1107, meanwhile, the cooling liquid in the water tank 1107 is further cooled by the fan 1105, the cooling liquid after heat exchange is pumped from the cooling system 1100 again by the water pump 1101 and is sent to the water inlet 32 of the water cooling piece 30 again to form recirculation, so that the purposes of saving cost and protecting environment are achieved.

Referring to fig. 1 and 6, a spray coating apparatus 1000 in accordance with an embodiment of the present utility model includes a cooling system 1100 in accordance with any of the above embodiments.

In this way, the spraying device 1000 is not easy to overheat and cause shutdown under the holding of the cooling system 1100, so that the normal operation of the spraying device 1000 is ensured, and the service life of the spraying device 1000 is prolonged.

Specifically, one spraying apparatus 1000 may correspond to one cooling system 1100, and the cooling system 1100 may provide uninterrupted heat dissipation for the motor cooling structure 100 of the spraying apparatus 1000 through the water pump 1101, the cooling device 1103, and the water cooling member 30, so as to ensure that the motor 10 operates at a desired temperature. Further, in addition to the heat generated by the motor 10 during operation of the spraying apparatus 1000, other components (such as a spray gun, an air compressor, etc.) that are prone to overheating exist, and the cooling system 1100 may provide heat dissipation for the overall structure of the spraying apparatus 1000.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A motor cooling structure of a spray coating apparatus, comprising:

a motor including a main body and a drive shaft extending from within the main body;

an atomizing disk mounted on the drive shaft; and

the water cooling piece is sleeved on the main body and is provided with a water cooling channel, a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the water cooling channel.

2. The motor cooling structure of the spraying apparatus according to claim 1, wherein a central axis of the water inlet and a central axis of the water outlet coincide.

3. The motor cooling structure of the spraying apparatus according to claim 1, wherein the water cooling passage is provided separately from the main body.

4. The motor cooling structure of the spraying apparatus according to claim 3, wherein the water cooling member includes an inner annular wall, an outer annular wall, a top wall and a bottom wall, the outer annular wall surrounds the inner annular wall, the top wall connects the inner annular wall and the outer annular wall, the bottom wall connects the inner annular wall and the outer annular wall, the inner annular wall, the outer annular wall, the top wall and the bottom wall together enclose the water cooling passage, and the inner annular wall is sleeved on the main body.

5. The motor cooling structure of the spraying apparatus according to claim 4, wherein the water inlet and the water outlet are provided on the outer circumferential wall.

6. The motor cooling structure of the spraying apparatus according to claim 1, wherein the water inlet and the water outlet are each provided with a water pipe joint.

7. The motor cooling structure of the spraying apparatus according to claim 1, wherein the cross section of the main body is square, and the axial dimension of the main body is larger than the axial dimension of the water cooling member.

8. A cooling system, characterized by comprising the motor cooling structure of the spraying device according to any one of claims 1-7.

9. The cooling system of claim 8, further comprising a water pump for delivering chilled water to the water inlet and a cooling device for exchanging heat with water flowing from the water outlet, the cooling device and the water cooling element being connected in series.

10. A spraying device characterized by comprising a cooling system according to claim 8 or 9.

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