A cooling structure, air compressor

Abstract

The application provides a cooling structure and an air compressor, wherein the cooling structure comprises a shell, a first inlet, a first outlet and a second outlet are arranged on the shell, a liquid cooling flow channel and a channel are arranged in the shell, the channel is located outside the liquid cooling flow channel along the radial direction of the shell, the channel is arranged in a spaced manner with the liquid cooling flow channel, the first inlet is communicated with the channel, the channel has a second inlet and a third inlet, the second inlet and the third inlet are communicated with the inner cavity of the shell, the second inlet is arranged in a facing manner with the first outlet, and the third inlet is arranged in a facing manner with the second outlet. According to the application, the technical problem that the cooling effect of the air compressor in the prior art is poor and influences the performance of the air compressor can be solved.

Description

Technical Field

[0001] This invention belongs to the field of air compressor technology, specifically relating to a cooling structure and an air compressor. Background Technology

[0002] Air compressor cooling is crucial in industrial applications. First, air compressors generate significant heat during operation; ineffective heat dissipation leads to elevated compressed gas temperatures and reduced compression efficiency. Second, excessively high operating temperatures accelerate wear and aging of mechanical components, shortening the compressor's lifespan. A good cooling system maintains the equipment within a suitable operating temperature range, reducing mechanical failures caused by high temperatures and extending the equipment's lifespan. Finally, excessively high air compressor temperatures can lead to fires or explosions, especially in the presence of flammable or explosive materials. Effective cooling measures significantly reduce this risk, ensuring the safety of equipment and personnel. In conclusion, air compressor cooling is not only key to improving efficiency and extending equipment lifespan but also a vital measure for ensuring safe production. Therefore, the design of cooling structures should be given full consideration when designing and maintaining air compressor systems.

[0003] Due to the poor cooling effect of existing air compressors, which affects their performance, this invention researches and designs a cooling structure and an air compressor. Summary of the Invention

[0004] Therefore, the present invention provides a cooling structure and an air compressor that can solve the technical problem of poor cooling effect of air compressors in the prior art, which affects the performance of air compressors.

[0005] To address the aforementioned problems, the present invention provides a cooling structure comprising: a housing, wherein the housing is provided with a first inlet, a first outlet, and a second outlet; a liquid cooling channel and a passage are provided within the housing; the passage is located outside the liquid cooling channel along the radial direction of the housing; the passage and the liquid cooling channel are arranged at intervals; the first inlet is connected to the passage; the passage has a second inlet and a third inlet; the second inlet and the third inlet are connected to the inner cavity of the housing; the second inlet is arranged opposite to the first outlet; and the third inlet is arranged opposite to the second outlet.

[0006] In some embodiments, along the axial direction of the housing, the second inlet is spaced apart from one end of the liquid cooling channel, and the third inlet is spaced apart from the other end of the liquid cooling channel.

[0007] In some embodiments, the liquid cooling channels are arranged in a spiral shape, and the pitch of the spiral is 6 mm.

[0008] In some embodiments, there are multiple first inlets and channels along the circumference of the housing, with each first inlet and channel arranged in a one-to-one correspondence; along the axial direction of the housing, the first inlet is located in the middle of the housing.

[0009] In some embodiments, the radial cross-section of the housing is used as the projection plane. The housing has a first side and a second side. The first inlet is located on the first side, and the first outlet and the second outlet are located on the second side. The second inlet and the first outlet are arranged in a one-to-one correspondence. The third inlet and the second outlet are arranged in a one-to-one correspondence.

[0010] In some embodiments, the housing contains a stator with windings, the first outlet and the second inlet are arranged opposite to the windings at one end of the stator, and the third inlet and the second outlet are arranged opposite to the windings at the other end of the stator.

[0011] In some embodiments, the inner wall of the housing is provided with a first flow guide and a second flow guide, the third inlet and the second outlet are located between the first flow guide and the second flow guide, and the first flow guide and the second flow guide extend toward the winding so that the airflow flowing out of the third inlet and the second inlet flows toward the winding.

[0012] In some embodiments, the radial cross-section of the housing is used as the projection plane, a first line is connected between the first inlet and the center of the housing, a second line is connected between the first outlet and the center of the housing, and an angle is formed between the first line and the second line, the angle being 120° to 180°.

[0013] In some implementations, the included angle is 180°.

[0014] The present invention also provides an air compressor that includes the aforementioned cooling structure.

[0015] The cooling structure and air compressor provided by this invention have the following beneficial effects:

[0016] A liquid cooling channel and a passage are provided inside the housing. The passage is located outside the liquid cooling channel along the radial direction of the housing. The passage and the liquid cooling channel are arranged at intervals. The airflow entering the passage from the first inlet exchanges heat with the heat exchange medium in the liquid cooling channel, thereby reducing the temperature of the airflow entering the housing and improving the cooling efficiency of the cooling air. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cooling structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the airflow path in the cooling structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the liquid cooling channel in the cooling structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the radial cross-section of the cooling structure of the present invention.

[0022] The attached figures are labeled as follows:

[0023] 1. Shell; 2. Liquid cooling channel; 3. First inlet; 4. First outlet; 5. Second outlet; 6. Winding; 7. First guide section; 8. Second guide section; 9. Channel; 10. Second inlet; 11. Third inlet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0028] See also Figure 1-4 As shown, according to an embodiment of the present invention, a cooling structure is provided, comprising: a housing 1, wherein a first inlet 3, a first outlet 4, and a second outlet 5 are provided on the housing 1, and a liquid cooling channel 2 and a channel 9 are provided inside the housing 1. Along the radial direction of the housing 1, the channel 9 is located outside the liquid cooling channel 2 and is arranged at intervals from the liquid cooling channel 2. The first inlet 3 is connected to the channel 9. The channel 9 has a second inlet 10 and a third inlet 11, which are connected to the inner cavity of the housing 1. The second inlet 10 is arranged opposite to the first outlet 4, and the third inlet 11 is arranged opposite to the second outlet 5.

[0029] In this technical solution, a liquid cooling channel 2 and a channel 9 are provided inside the housing 1. The channel 9 is located radially outward from the liquid cooling channel 2 and is spaced apart from it. The airflow entering the channel 9 from the first inlet 3 exchanges heat with the heat exchange medium in the liquid cooling channel 2, thereby reducing the temperature of the airflow entering the housing 1 and improving the cooling efficiency of the cooling air. The basic formula for convective heat transfer is Newton's law of cooling, Q = hA(Th - Tc). From Newton's law of cooling, it can be seen that the heat transfer rate Q is directly proportional to the temperature difference (Th - Tc). This means that the lower the temperature Tc of the cooling medium and the greater the temperature difference (Th - Tc), the higher the heat transfer rate Q.

[0030] In some embodiments, along the axial direction of the housing 1, the second inlet 10 is spaced apart from one end of the liquid cooling channel 2, and the third inlet 11 is spaced apart from the other end of the liquid cooling channel 2.

[0031] In this technical solution, the liquid cooling channel 2 is located between the third inlet 11 and the second inlet 10. Therefore, along the axial direction of the shell 1, the liquid cooling channel 2 exchanges heat with the channel 9, which increases the heat exchange area between the liquid cooling channel 2 and the channel 9 and improves the heat exchange efficiency of the cooling air. The third inlet 11 and the second inlet 10 will not affect the arrangement of the liquid cooling channel 2.

[0032] In some embodiments, the liquid cooling channel 2 is arranged in a spiral shape, and the pitch of the spiral is 6 mm.

[0033] In this technical solution, the liquid cooling channel 2 is arranged in a spiral shape to ensure that the cooling water cools the cylinder uniformly. The cooling water channel extends around the cylinder in a spiral distribution, and the pitch is preferably selected as 6mm.

[0034] In some embodiments, there are multiple first inlets 3 and channels 9 along the circumference of the housing 1, with each first inlet 3 and channel 9 arranged in a one-to-one correspondence; along the axial direction of the housing 1, the first inlet 3 is located in the middle of the housing 1.

[0035] In this technical solution, the first inlet 3 is located in the middle of the housing 1. 4. Cooling air is generally provided by a fan. The temperature of the cooling air after compression by the fan is often higher than room temperature, reaching 40°C. To ensure that the liquid cooling channel 2 can cool the cooling air, the first inlet 3 is opened in the middle of the housing 1. The air then flows into the motor through the air duct extending to both sides of the housing 1. The cooling air duct is adjacent to the liquid cooling channel 2, and the cooling air temperature is reduced through heat transfer.

[0036] In some embodiments, the radial section of the housing 1 is used as the projection plane. The housing 1 has a first side and a second side. The first inlet 3 is located on the first side, the first outlet 4 and the second outlet 5 are located on the second side, the second inlet 10 is arranged in a one-to-one correspondence with the first outlet 4, and the third inlet 11 is arranged in a one-to-one correspondence with the second outlet 5.

[0037] In this technical solution, the first inlet 3 has five rectangular air vents, which are arranged in a straight line along the circumference of the middle of the housing 1. Multiple air inlets allow for better airflow distribution, preventing localized overheating and reducing resistance to airflow entering the motor. With the radial cross-section of the housing 1 as the projection plane, the first outlet 4 and the second outlet 5 coincide. Multiple air inlets also provide redundancy; if one air inlet is blocked by dust or other debris, the others can still operate normally, ensuring that the cooling effect of the air compressor is not significantly affected. The first outlet 4 and the second outlet 5 are located on the left and right sides of the housing 1, with 4-5 rectangular air vents distributed on each side in a straight line along the circumference of the housing 1. Cooling air flows into the motor from the left side through the air inlet and can directly exit from the left outlet. Only a small amount of cooling air flows out from the right outlet along the stator-rotor air gap, ensuring uniform temperature distribution inside the motor. Furthermore, the amount of airflow in the stator-rotor air gap is related to wind friction loss; the less cooling air flows through the air gap, the lower the wind friction loss on the rotor surface.

[0038] In some embodiments, the housing 1 has a stator with windings 6 disposed thereon. The first outlet 4 and the second inlet 10 are arranged opposite to the windings 6 at one end of the stator, and the third inlet 11 and the second outlet 5 are arranged opposite to the windings 6 at the other end of the stator.

[0039] In this technical solution, the first outlet 4 and the second inlet 10 are arranged opposite to the winding 6 at one end of the stator, and the third inlet 11 and the second outlet 5 are arranged opposite to the winding 6 at the other end of the stator. That is, the first outlet 4 and the second inlet 10 provide air cooling for the winding 6 at one end of the stator, and the third inlet 11 and the second outlet 5 provide air cooling for the winding 6 at the other end of the stator, thereby achieving separate cooling and temperature reduction of the windings at both ends and improving cooling efficiency.

[0040] In some embodiments, the inner wall of the housing 1 is provided with a first flow guide 7 and a second flow guide 8, and the third inlet 11 and the second outlet 5 are located between the first flow guide 7 and the second flow guide 8. The first flow guide 7 and the second flow guide 8 extend toward the winding 6 so that the airflow from the third inlet 11 and the second inlet 10 flows toward the winding. The inlet and outlet of the liquid cooling channel (2) can be located between the first outlet 4 and the second outlet 5.

[0041] In this technical solution, see [reference] Figure 1As shown, the first guide section 7 is inclined, and the inclined structure is inclined towards the winding 6. The inclined surface is annular on the inner wall of the housing 1, so that the air flowing in from the second air inlet 10 flows towards the winding 6 and guides the air flowing through the winding 6 to the first air outlet 4. The second guide section 8 is arc-shaped, and the arc is inclined towards the winding 6. The arc is annular on the inner wall of the housing 1, so that the air flowing in from the third air inlet 11 flows towards the winding 6 and guides the air flowing through the winding 6 to the second air outlet 5. The first guide section 7 and the second guide section 8 can guide the cooling air to the position of the heat-generating components such as the stator winding and stator core, ensuring that the cooling air is in contact with the heat source, improving the heat exchange efficiency, and preventing the fluid from flowing directly from the air inlet to the air outlet. The angle between the first guide section 7 and the second inlet 10, the third inlet 11 and the second guide section 8 is in the range of 57° to 60°.

[0042] In some embodiments, with the radial cross-section of the housing 1 as the projection plane, a first line connects the first inlet 3 to the center of the housing 1, and a second line connects the first outlet to the center of the housing 1. An angle exists between the first line and the second line, and the angle is between 120° and 180°. The included angle is 180°.

[0043] In this technical solution, to ensure that the cooling air enters and exits from the same side of the stator at the same time, the cooling air should enter the motor from the same side and exit from the same side. The angle between the air inlet and the air outlet should not be too small to ensure a good cooling effect.

[0044] The cooling structure of this invention utilizes cooling water to lower the temperature of the cooling air, thereby reducing the temperature of the cooling air entering the motor and resulting in a better cooling effect. Compared to axial ventilation, radial ventilation involves less airflow through the stator-rotor air gap, which reduces windage losses.

[0045] The present invention also provides an air compressor including the cooling structure described above.

[0046] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A cooling structure, characterized in that: include: A housing (1) is provided with a first inlet (3), a first outlet (4), and a second outlet (5). A liquid cooling channel (2) and a passage (9) are provided inside the housing (1). Along the radial direction of the housing (1), the passage (9) is located outside the liquid cooling channel (2) and is spaced apart from the liquid cooling channel (2). The first inlet (3) is connected to the passage (9). The passage (9) has a second inlet (10) and a third inlet (11). The second inlet (10)... The third inlet (11) is connected to the inner cavity of the housing (1), the second inlet (10) is arranged opposite to the first outlet (4), and the third inlet (11) is arranged opposite to the second outlet (5); the housing (1) has a stator, and the stator is provided with a winding (6), the first outlet (4) and the second inlet (10) are arranged opposite to the winding (6) at one end of the stator, and the third inlet (11) and the second outlet (5) are arranged opposite to the winding (6) at the other end of the stator; The inner wall of the housing (1) is provided with a first flow guide (7) and a second flow guide (8). The third inlet (11) and the second outlet (5) are located between the first flow guide (7) and the second flow guide (8). The first flow guide (7) and the second flow guide (8) extend toward the winding (6) so that the airflow from the third inlet (11) and the second inlet (10) flows toward the winding.

2. The cooling structure according to claim 1, characterized in that: Along the axial direction of the housing (1), the second inlet (10) is spaced apart from one end of the liquid cooling channel (2), and the third inlet (11) is spaced apart from the other end of the liquid cooling channel (2).

3. The cooling structure according to claim 1, characterized in that: The liquid cooling channel (2) is arranged in a spiral shape, and the pitch of the spiral is 6 mm.

4. The cooling structure according to claim 1, characterized in that: Along the circumference of the housing (1), there are multiple first inlets (3) and channels (9), with the first inlets (3) and channels (9) arranged in a one-to-one correspondence; along the axial direction of the housing (1), the first inlet (3) is located in the middle of the housing (1).

5. The cooling structure according to claim 4, characterized in that: With the radial section of the housing (1) as the projection plane, the housing (1) has a first side and a second side, the first inlet (3) is located on the first side, the first outlet (4) and the second outlet (5) are located on the second side, the second inlet (10) is arranged in a one-to-one correspondence with the first outlet (4), and the third inlet (11) is arranged in a one-to-one correspondence with the second outlet (5).

6. The cooling structure according to claim 1, characterized in that: With the radial cross section of the shell (1) as the projection plane, there is a first line connecting the first inlet (3) and the center of the shell (1), and a second line connecting the first outlet and the center of the shell (1). There is an angle between the first line and the second line, and the angle is 120°~180°.

7. The cooling structure according to claim 6, characterized in that: The included angle is 180°.

8. An air compressor, characterized in that, The cooling structure includes any one of claims 1 to 7.

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