CN111327150A - Heat dissipation device for electromechanical equipment - Google Patents
Heat dissipation device for electromechanical equipment Download PDFInfo
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- CN111327150A CN111327150A CN202010347259.9A CN202010347259A CN111327150A CN 111327150 A CN111327150 A CN 111327150A CN 202010347259 A CN202010347259 A CN 202010347259A CN 111327150 A CN111327150 A CN 111327150A
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- cold water
- plate
- motor
- water plate
- connecting pipe
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K9/16—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the cooling medium circulates through ducts or tubes within the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a heat dissipation device for electromechanical equipment, which comprises a motor body, wherein the motor body comprises a motor shell, concave cavities are annularly distributed on the surface of the motor shell, a first cold water plate and a second cold water plate are sleeved on the surface of the motor shell, and one sides of the first cold water plate and the second cold water plate are communicated with a connecting pipe. The contact area between the first cold water plate and the motor is larger than that between the second cold water plate and the motor, the first cold water plate and the second cold water plate are respectively communicated with the first trapezoidal pipe and the second trapezoidal pipe, and the first trapezoidal pipe and the second trapezoidal pipe can be attached to the groove, so that the contact area between the first cold water plate and the motor shell is increased, and the cooling efficiency can be improved.
Description
Technical Field
The invention relates to the field of electromechanical equipment heat dissipation, in particular to a heat dissipation device for electromechanical equipment.
Background
The motor is a common electromechanical device, is used as a power source, and is widely applied to various industries such as agriculture, industry, transportation industry, mining industry and the like. The motor can produce a large amount of heats in work, if these heats can not in time distribute away, can lead to the temperature of motor to rise sharply, light then can influence motor working property, heavy then leads to the motor to burn out.
In the prior art, in order to dissipate heat generated during the operation of the motor, a heat dissipation fin is generally arranged on a motor shell to increase the heat dissipation area, so that the heat dissipation speed is accelerated, and the overhigh temperature of the motor caused by heat accumulation is avoided. However, the heat dissipation speed of the heat dissipation structure is still slow, and under the condition of a high-temperature or/and high-power motor, the situation that the temperature of the motor is too high is difficult to avoid.
Based on the defects in the prior art, the invention discloses a heat dissipation device for electromechanical equipment, which can dissipate heat in time under the condition of a high-temperature or/and high-power motor so as to ensure the normal work of the motor.
Disclosure of Invention
The invention aims to provide a heat dissipation device for electromechanical equipment, which is provided with a first cold water plate and a second cold water plate, wherein compared with an annular water pipe, the contact area between the first cold water plate and the motor is larger than that between the second cold water plate and the motor; the first cold water plate and the second cold water plate are connected through a hinge and a bolt, so that the cold water plate is convenient to disassemble, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a heat abstractor for electromechanical device, includes motor body, motor body includes motor housing, motor housing surface ring distributes has the cavity, motor housing surface has cup jointed first cold water board and the cold water board of second, first cold water board and the cold water board of second one side intercommunication have first connecting pipe, first cold water board upside rotates to be connected in the cold water board of second, first cold water board downside is connected in the cold water board of second, first cold water board and the cold water board of second are the arc.
Preferably, first cold water board and second cold water board cup joint in the motor housing surface, first water cavity has been seted up to first cold water inboard inside, first cold water board one side is provided with first trapezoidal pipe, first water cavity communicates in first trapezoidal pipe through the bar through-hole, second water cavity has been seted up to second cold water inboard inside, second cold water board one side is provided with the second trapezoidal pipe, the second water cavity communicates in the second trapezoidal pipe through the bar through-hole, first trapezoidal pipe and the laminating of second trapezoidal pipe surface in the cavity.
Preferably, the first cold water plate and the second cold water plate are both communicated with a second connecting pipe.
Preferably, the motor body comprises a base, and an elastic rubber plate is connected to the lower side of the base.
Preferably, the elastic rubber bump is connected to the lower side of the elastic rubber plate, and the elastic rubber bump and the elastic rubber plate are of an integrated structure.
Preferably, the surface of the base is provided with a mounting hole, and the mounting hole is a waist-shaped hole.
Preferably, the upper sides of the first cold water plate and the second cold water plate are respectively provided with a first connecting plate, and the first connecting plates are connected in a rotating mode through hinges.
Preferably, the lower sides of the first cold water plate and the second cold water plate are respectively provided with a second connecting plate, and the two groups of second connecting plates are connected through bolts.
Preferably, the first connecting pipe is a water inlet, the second connecting pipe is a water outlet, and cold water is injected into the first water cavity through the first connecting pipe to cool the electromechanical equipment and then flows out of the second connecting pipe; cold water is continuously injected into the first connecting pipe, hot water which takes away heat generated by electromechanical equipment is continuously discharged by the second connecting pipe, the generated heat is timely dissipated, overheating caused by heat accumulation is prevented, and normal work of the motor is guaranteed.
Preferably, the temperature T1 of the cold water injected by the first connecting pipe is 10-15 ℃, and the pressure P1 in the first water cavity is 205-320 KPa; particularly, the temperature T1 and the pressure P1 of the cold water meet the requirements that T1. P1 is more than or equal to 2200 and is less than or equal to 4350.
Preferably, the third connecting pipe is an input port, and the fourth connecting pipe is an output port; injecting the water-gas mixture into the second water cavity through the third connecting pipe, cooling the electromechanical equipment, and outputting the electromechanical equipment from the fourth connecting pipe; the aqueous vapor mixture is constantly input to the third connecting pipe, to electromechanical device cooling back, from the output of fourth connecting pipe, in time takes away the heat that produces, prevents the overheated that the heat accumulation caused, guarantees the normal work of motor.
Preferably, the temperature T2 of the water-gas mixture is 10-15 ℃; the gas in the water-gas mixture is air; the pressure P2 in the second water chamber is 350-470 KPa.
Preferably, for better cooling treatment of the motor, the temperature T1 of the cold water and the pressure P1, the temperature T2 of the water-gas mixture and the pressure P2 in the second water cavity satisfy the following relations:
P2/P1=α·(T1+T2)；
wherein α is a relation coefficient, and the value range is 0.04-0.1.
Preferably, the first cold water plate and the second cold water plate are made of metal, especially aluminum, copper and alloy thereof, so as to facilitate heat conduction.
Preferably, the shape of one side of the first cold water plate, the second cold water plate and the motor is matched with the outer binding face of the motor, so that complete binding is ensured.
Preferably, the metal thickness h of the joint side of the first cold water plate and the second cold water plate with the motor is 0.2-0.6 mm; in particular, in order to further cool the motor, quickly take away heat generated during the operation of the motor and prevent the normal operation of the motor from being affected by the overhigh temperature caused by heat accumulation, the metal thickness h, the temperature T1 of cold water and the temperature T2 of a water-gas mixture satisfy the following relation:
P1=β·(P2·h)；
wherein β is a pressure coefficient, and the value range is 1.15-2.76.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the heat dissipation device for the electromechanical equipment, the first cold water plate and the second cold water plate are arranged, so that the contact area between the first cold water plate and the motor is larger than that between the second cold water plate and the motor relative to the annular water pipe, the first cold water plate and the second cold water plate are respectively communicated with the first trapezoid pipe and the second trapezoid pipe, the first trapezoid pipe and the second trapezoid pipe can be attached to the groove, the contact area between the first trapezoid pipe and the motor shell is increased, and the cooling efficiency can be improved; the first cold water plate and the second cold water plate are connected through hinges and bolts, and are convenient to detach.
2. According to the heat dissipation device for the electromechanical equipment, the first connecting pipe is a water inlet, the second connecting pipe is a water outlet, cold water is injected into the first water cavity through the first connecting pipe, cooling treatment is carried out on the electromechanical equipment, and then the cold water flows out of the second connecting pipe; cold water is continuously injected into the first connecting pipe, hot water which takes away heat generated by electromechanical equipment is continuously discharged by the second connecting pipe, the generated heat is timely dissipated, overheating caused by heat accumulation is prevented, and normal work of the motor is guaranteed.
3. According to the heat dissipation device for the electromechanical equipment, the third connecting pipe is an input port, and the fourth connecting pipe is an output port; injecting the water-gas mixture into the second water cavity through the third connecting pipe, cooling the electromechanical equipment, and outputting the electromechanical equipment from the fourth connecting pipe; the aqueous vapor mixture is constantly input to the third connecting pipe, to electromechanical device cooling back, from the output of fourth connecting pipe, in time takes away the heat that produces, prevents the overheated that the heat accumulation caused, guarantees the normal work of motor.
4. The heat dissipation device for the electromechanical equipment is used for better dissipating heat and reducing temperature of the electromechanical equipment by setting the range and the relation of the temperature T1 of cold water injected by the first connecting pipe and the pressure P1 in the first water cavity.
Drawings
Fig. 1 is a schematic front view of a heat dissipation device for an electromechanical device according to the present invention.
Fig. 2 is a side view of the first cold water plate and the second cold water plate of the heat dissipation device for electromechanical equipment according to the present invention.
Fig. 3 is a schematic top view of the heat dissipation device for an electromechanical apparatus according to the present invention.
In the figure: 1. a motor body; 2. a motor housing; 3. a third connecting pipe; 4. a fourth connecting pipe; 5. a concave cavity; 9. a first cold water plate; 10. a second cold water plate; 8. a first connecting pipe; 11. a first water chamber; 12. a first trapezoidal pipe; 13. a second water chamber; 14. a second trapezoidal pipe; 15. a second connecting pipe; 17. a base; 18. an elastic rubber plate; 19. an elastic rubber bump; 20. mounting holes; 21. a first connecting plate; 22. a second connecting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a heat dissipation device for electromechanical equipment includes a motor body 1, the motor body 1 includes a motor housing 2, a cavity 5 is annularly distributed on a surface of the motor housing 2, a first cold water plate 9 and a second cold water plate 10 are sleeved on a surface of the motor housing 2, a first connection pipe 8 is communicated with one side of each of the first cold water plate 9 and the second cold water plate 10, first connection plates 21 are respectively arranged on upper sides of the first cold water plate 9 and the second cold water plate 10, and the two groups of first connection plates 21 are rotatably connected through hinges. The lower sides of the first cold water plate 9 and the second cold water plate 10 are respectively provided with a second connecting plate 22, and the two groups of second connecting plates 22 are connected through bolts.
First cold water board 9 and second cold water board 10 are the arc, and first cold water board 9 and second cold water board 10 fixed cover connect in motor housing 2 surfaces, and first water cavity 11 has been seted up to first cold water board 9 inside, and second water cavity 13 has been seted up to second cold water board 10 inside.
The first connecting pipe 8 is a water inlet, the second connecting pipe 15 is a water outlet, cold water is injected into the first water cavity 11 through the first connecting pipe 8, cooling treatment is carried out on the electromechanical equipment, and then the cold water flows out of the second connecting pipe 15; cold water is continuously injected into the first connecting pipe 8, hot water which takes away heat generated by electromechanical equipment is continuously discharged by the second connecting pipe 15, the generated heat is timely dissipated and taken away, overheating caused by heat accumulation is prevented, and normal work of the motor is guaranteed.
The temperature T1 of the cold water injected by the first connecting pipe 8 is 10-15 ℃, and the pressure P1 in the first water cavity 11 is 205-320 KPa; particularly, the temperature T1 and the pressure P1 of the cold water meet the requirements that T1. P1 is more than or equal to 2200 and is less than or equal to 4350.
The third connecting pipe 3 is an input port, and the fourth connecting pipe 4 is an output port; injecting the water-air mixture into the second water cavity 13 through the third connecting pipe 3, cooling the electromechanical equipment, and outputting the electromechanical equipment from the fourth connecting pipe 4; the third connecting pipe 3 continuously inputs the water-air mixture, after the electromechanical device is cooled, the water-air mixture is output from the fourth connecting pipe 4, the generated heat is timely dissipated and taken away, the overheating caused by heat accumulation is prevented, and the normal work of the motor is ensured.
The temperature T2 of the water-gas mixture is 10-15 ℃; the gas in the water-gas mixture is air; the pressure P2 in the second water chamber is 350-470 KPa.
The first cold water plate and the second cold water plate are made of metal materials, particularly aluminum, copper and alloy thereof, so that heat conduction is facilitated.
In order to support the motor body 1, the motor body 1 includes a base 17, and an elastic rubber plate 18 is connected to a lower side of the base 17. The elastic rubber bump 19 is connected to the lower side of the elastic rubber plate 18, and the elastic rubber bump 19 and the elastic rubber plate 18 are of an integrated structure. The surface of the base 17 is provided with a mounting hole 20, and the mounting hole 20 is a waist-shaped hole.
Example 2
The utility model provides a heat abstractor for electromechanical device, including motor body 1, motor body 1 includes motor housing 2, the annular distribution in 2 surfaces of motor housing has cavity 5, the fixed cover in 2 surfaces of motor housing has first cold water board 9 and the cold water board 10 of second, first cold water board 9 and the cold water board 10 one side intercommunication of second have first connecting pipe 8, the equal fixed welding of the equal side of first cold water board 9 and the cold water board 10 of second has first connecting plate 21, two sets of first connecting plate 21 pass through the hinge rotation and connect. The lower sides of the first cold water plate 9 and the second cold water plate 10 are fixedly welded with second connecting plates 22, and the two groups of second connecting plates 22 are fixedly connected through bolts.
First cold water board 9 and second cold water board 10 are the arc, first cold water board 9 and the fixed cover of second cold water board 10 connect in motor housing 2 surfaces, first water cavity 11 has been seted up to first cold water board 9 inside, first cold water board 9 one side is provided with first trapezoidal pipe 12, first water cavity 11 communicates in first trapezoidal pipe 12 through two sets of through-holes, second water cavity 13 has been seted up to second cold water board 10 inside, the fixed welding in second cold water board 10 one side has second trapezoidal pipe 14, second water cavity 13 communicates in second trapezoidal pipe 14 through two sets of through-holes, first trapezoidal pipe 12 and the 14 external surface laminating of second trapezoidal pipe in cavity 5, first cold water board 9 and second cold water board 10 one side all are fixed with second connecting pipe 15. One end of each of the first connecting pipe 8 and the second connecting pipe 15 is communicated with a water path of the cooling circulating water.
In order to support the motor body 1, the motor body 1 includes a base 17, and an elastic rubber plate 18 is fixedly connected to a lower side of the base 17. The elastic rubber bump 19 is fixedly connected to the lower side of the elastic rubber plate 18, and the elastic rubber bump 19 and the elastic rubber plate 18 are of an integrated structure. The surface of the base 17 is provided with a mounting hole 20, and the mounting hole 20 is a waist-shaped hole.
The working principle is as follows: the first cold water plate 9 and the second cold water plate 10 are arranged, compared with an annular water pipe, the contact area between the first cold water plate 9 and the motor shell 2 is larger, the first cold water plate 9 and the second cold water plate 10 are respectively communicated with the first trapezoid-shaped pipe 12 and the second trapezoid-shaped pipe 14, the first trapezoid-shaped pipe 12 and the second trapezoid-shaped pipe 14 can be attached to the concave cavity 5, the contact area between the first cold water plate 9 and the motor shell 2 is increased, and the cooling efficiency can be improved; the first cold water plate 9 and the second cold water plate 10 are connected through hinges and bolts, and are convenient to detach.
Example 3
The utility model provides a heat abstractor for electromechanical device, including motor body 1, motor body 1 includes motor housing 2, the annular distribution in 2 surfaces of motor housing has cavity 5, motor housing 2 surface has cup jointed first cold water board 9 and second cold water board 10, first cold water board 9 and the cold water board 10 one side intercommunication of second have first connecting pipe 8, first cold water board 9 and the cold water board 10 upside of second all are provided with first connecting plate 21, two sets of first connecting plate 21 are through the hinge rotation connection. The lower sides of the first cold water plate 9 and the second cold water plate 10 are respectively provided with a second connecting plate 22, and the two groups of second connecting plates 22 are connected through bolts.
First cold water board 9 and second cold water board 10 are the arc, and first cold water board 9 and second cold water board 10 fixed cover connect in motor housing 2 surfaces, and first water cavity 11 has been seted up to first cold water board 9 inside, and second water cavity 13 has been seted up to second cold water board 10 inside.
The first connecting pipe 8 is a water inlet, the second connecting pipe 15 is a water outlet, cold water is injected into the first water cavity 11 through the first connecting pipe 8, cooling treatment is carried out on the electromechanical equipment, and then the cold water flows out of the second connecting pipe 15; cold water is continuously injected into the first connecting pipe 8, hot water which takes away heat generated by electromechanical equipment is continuously discharged by the second connecting pipe 15, the generated heat is timely dissipated and taken away, overheating caused by heat accumulation is prevented, and normal work of the motor is guaranteed.
The temperature T1 of the cold water injected by the first connecting pipe 8 is 10-15 ℃, and the pressure P1 in the first water cavity 11 is 205-320 KPa; particularly, the temperature T1 and the pressure P1 of the cold water meet the requirements that T1. P1 is more than or equal to 2200 and is less than or equal to 4350.
The third connecting pipe 3 is an input port, and the fourth connecting pipe 4 is an output port; injecting the water-air mixture into the second water cavity 13 through the third connecting pipe 3, cooling the electromechanical equipment, and outputting the electromechanical equipment from the fourth connecting pipe 4; the third connecting pipe 3 continuously inputs the water-air mixture, after the electromechanical device is cooled, the water-air mixture is output from the fourth connecting pipe 4, the generated heat is timely dissipated and taken away, the overheating caused by heat accumulation is prevented, and the normal work of the motor is ensured.
The temperature T2 of the water-gas mixture is 10-15 ℃; the gas in the water-gas mixture is air; the pressure P2 in the second water chamber is 350-470 KPa.
The first cold water plate and the second cold water plate are made of metal materials, particularly aluminum, copper and alloy thereof, so that heat conduction is facilitated.
For better cooling treatment of the motor, the temperature T1 of the cold water and the pressure P1, the temperature T2 of the water-gas mixture and the pressure P2 in the second water cavity satisfy the following relations:
P2/P1=α·(T1+T2)；
wherein α is a relation coefficient, and the value range is 0.04-0.1.
The first cold water plate and the second cold water plate are made of metal materials, particularly aluminum, copper and alloy thereof, so that heat conduction is facilitated.
The shape of one side of the first cold water plate, the second cold water plate and the motor is matched with the binding surface outside the motor, so that complete binding is guaranteed.
The metal thickness h of the first cold water plate and the second cold water plate at the joint side of the first cold water plate and the second cold water plate with the motor is 0.2-0.6 mm; in particular, in order to further cool the motor, quickly take away heat generated during the operation of the motor and prevent the normal operation of the motor from being affected by the overhigh temperature caused by heat accumulation, the metal thickness h, the temperature T1 of cold water and the temperature T2 of a water-gas mixture satisfy the following relation:
P1=β·(P2·h)；
wherein β is a pressure coefficient, and the value range is 1.15-2.76.
In order to support the motor body 1, the motor body 1 includes a base 17, and an elastic rubber plate 18 is connected to a lower side of the base 17. The elastic rubber bump 19 is connected to the lower side of the elastic rubber plate 18, and the elastic rubber bump 19 and the elastic rubber plate 18 are of an integrated structure. The surface of the base 17 is provided with a mounting hole 20, and the mounting hole 20 is a waist-shaped hole.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A heat abstractor for electromechanical device, includes motor body (1), its characterized in that: the motor body (1) comprises a motor shell (2), a concave cavity (5) is annularly distributed on the surface of the motor shell (2), a first cold water plate (9) and a second cold water plate (10) are sleeved on the surface of the motor shell (2), one sides of the first cold water plate (9) and the second cold water plate (10) are communicated with connecting pipes, and the first cold water plate (9) and the second cold water plate (10) are arc-shaped plates.
2. The heat dissipating apparatus for an electromechanical device of claim 1, wherein: first cold water board (9) and second cold water board (10) cup joint in motor housing (2) surface, first water cavity (11) have been seted up to first cold water board (9) inside, first cold water board (9) one side is provided with first trapezoidal pipe (12), first water cavity (11) communicate in first trapezoidal pipe (12) through the bar through-hole, second water cavity (13) have been seted up to second cold water board (10) inside, second cold water board (10) one side is provided with second trapezoidal pipe (14), second water cavity (13) communicate in second trapezoidal pipe (14) through the bar through-hole, first trapezoidal pipe (12) and second trapezoidal pipe (14) surface laminating in cavity (5).
3. A heat sink for an electromechanical device according to claims 1 and 2, wherein: the motor body (1) comprises a base (17), and an elastic rubber plate (18) is connected to the lower side of the base (17).
4. The heat dissipating apparatus for an electromechanical device of claim 1, wherein: the elastic rubber plate is characterized in that an elastic rubber bump (19) is arranged on the lower side of the elastic rubber plate (18), and the elastic rubber bump (19) and the elastic rubber plate (18) are of an integrated structure.
5. The heat dissipating apparatus for an electromechanical device of claim 2, wherein: the surface of the base (17) is provided with a mounting hole (20), and the mounting hole (20) is a waist-shaped hole.
6. The heat dissipating apparatus for an electromechanical device of claim 1, wherein: the upper sides of the first cold water plate (9) and the second cold water plate (10) are respectively provided with a first connecting plate (21), and the first connecting plates (21) are connected in two groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347259.9A CN111327150B (en) | 2020-04-28 | 2020-04-28 | Heat dissipation device for electromechanical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010347259.9A CN111327150B (en) | 2020-04-28 | 2020-04-28 | Heat dissipation device for electromechanical equipment |
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| CN111327150A true CN111327150A (en) | 2020-06-23 |
| CN111327150B CN111327150B (en) | 2021-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111720365A (en) * | 2020-06-29 | 2020-09-29 | 江苏佳润喷灌设备有限公司 | High-pressure air pump cooling accessory |
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| CN111720365A (en) * | 2020-06-29 | 2020-09-29 | 江苏佳润喷灌设备有限公司 | High-pressure air pump cooling accessory |
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