Radiator of labyrinth type baffle plate hole group diversion type efficient cooling structure and application of radiator

Abstract

The invention provides a heat radiator of a labyrinth type baffle plate hole group flow guide type efficient cooling structure. The heat radiator comprises a shell. A middle partition plate is arranged in the shell, and the inner space of the shell is divided into two independent heat exchange cavities through the middle partition plate. A flow guide partition plate is arranged in the heat exchange cavity and divides the heat exchange cavity into an inner cavity and an outer cavity. The flow guide partition plate is lower than the middle partition plate; a baffle plate assembly is arranged in the outer cavity to form an S-shaped labyrinth runner; the baffle plate assembly is composed of an outer baffle plate and an inner baffle plate which are distributed in a crossed mode, outer inclined holes inclining towards the outer side are formed in the outer baffle plate in a grouped mode, and inner inclined holes inclining towards the inner side are formed in the inner baffle plate in a grouped mode. According to the radiator, by means of the synergistic effect of the labyrinth type baffle plates and hole group flow guide, the airflow path is effectively prolonged, the turbulence intensity is enhanced, a thermal boundary layer is destroyed, the heat exchange efficiency is remarkably improved, the anti-deposition capacity is achieved, and the heat dissipation performance can be kept stable for a long time. Correspondingly, the invention further provides a motor adopting the radiator.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling of motors, and in particular to a radiator with a labyrinth-type baffle hole group flow-guiding type high-efficiency cooling structure and a motor using the radiator. Background Art

[0002] Motor temperature rise affects motor performance. Therefore, rapid heat dissipation is necessary during motor operation to ensure stable performance. For high-power asynchronous motors, installing a heat sink on top of the motor is a common method for forced heat dissipation.

[0003] However, the traditional asynchronous motor cooling structure has the following problems:

[0004] 1) Laminar flow dominance: The guide plates are mostly single-channel or fixed-angle designs, resulting in short airflow paths and insufficient turbulence intensity, leading to low heat exchange efficiency;

[0005] 2) Deposition and dead corners: Traditional baffles are prone to forming flow dead corners, and impurity deposition will reduce the effective heat exchange area.

[0006] To improve the heat dissipation problem, existing technologies have proposed increasing the number of guide plates to extend the path, thereby improving heat exchange efficiency. However, this single optimization method of simply extending the airflow path is not ideal. Summary of the Invention

[0007] To overcome the aforementioned problems existing in the prior art, the present invention provides a heat sink with a high-efficiency cooling structure featuring a labyrinth-type baffle and hole cluster flow guidance. This heat sink utilizes the synergistic effect of the labyrinth-type baffles and hole cluster flow guidance to effectively extend the airflow path, enhance turbulence intensity, and disrupt the thermal boundary layer, significantly improving heat exchange efficiency. It also exhibits anti-deposition capabilities and maintains long-term stable heat dissipation performance. Correspondingly, the present invention also provides a motor incorporating the present heat sink.

[0008] For the radiator, the technical solution of this application is as follows:

[0009] A radiator with a labyrinth-type baffle hole group guide-flow type high-efficiency cooling structure comprises a shell with an opening at the bottom, and a tube bundle arranged inside the shell; the two ends of the tube bundle are respectively matched with the end plates on both sides of the shell; a centrifugal fan is provided on the side of the shell, and the outlet of the centrifugal fan is connected to the inlet of the tube bundle; a middle partition is provided in the shell, and the middle partition divides the internal space of the shell into two independent heat exchange chambers; a guide baffle is provided in the heat exchange chamber, and the guide baffle divides the heat exchange chamber into an inner cavity and an outer cavity; the height of the guide baffle is lower than the height of the middle partition, so that the inner cavity and the outer cavity of the heat exchange cavity are connected at the top position; a baffle assembly is provided in the outer cavity to form an S-shaped labyrinth flow channel; the baffle assembly is composed of cross-distributed outer baffles and inner baffles, the outer baffle is provided with outer inclined holes inclined outward in groups, and the inner baffle is provided with inner inclined holes inclined inward in groups; the outer inclined holes and the inner inclined holes constitute an inclined hole group.

[0010] Compared to existing technologies, this invention creates an S-shaped labyrinthine flow channel by installing specific baffles and deflectors within the radiator housing, extending contact time. Furthermore, inclined holes are arranged on the baffles to form a cluster of inclined holes, inducing multiscale turbulence and disrupting the continuity of the thermal boundary layer. The synergistic effect of the S-shaped labyrinthine flow channel and the inclined hole cluster improves the heat transfer coefficient, thereby enhancing heat dissipation efficiency. Furthermore, the inclined hole cluster eliminates dead spots in the flow channel, reducing the risk of impurity deposition. Furthermore, the hole clusters are integrated into the baffles of the labyrinthine flow channel, resulting in a compact structure.

[0011] Furthermore, in the radiator with the aforementioned labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure, the outer baffle is fixed to the end plate on the side of the shell, and the inner baffle is fixed to the flow-guiding partition. This structural design is easy to implement and has high reliability.

[0012] Furthermore, in the radiator with the aforementioned labyrinth-type baffle hole cluster flow-guiding high-efficiency cooling structure, the inclination angles of the outer and inner inclined holes are preferably 30°-60°. Too small an inclination angle of the outer and inner inclined holes will increase the length of the holes, increasing resistance along the way and thus weakening the wind force; too large an angle will cause the incoming air to blow straight down, reducing the distance and weakening the cooling effect. Setting the inclination angle of the outer and inner inclined holes (the angle between the centerline of the inclined hole and the horizontal line) to 30°-60° can achieve both low flow resistance and good heat exchange.

[0013] Furthermore, in the heat sink with the aforementioned labyrinth-type baffle hole cluster flow-guiding high-efficiency cooling structure, the outer and inner inclined holes preferably have a diameter of 3-8 mm. Aperture diameter affects the flow resistance and cooling effect; smaller apertures increase resistance, while larger apertures affect the airflow deflection effect. Therefore, a diameter range of 3-8 mm for the outer and inner inclined holes is more suitable.

[0014] Furthermore, in the aforementioned heat sink with a labyrinth-shaped baffle hole cluster flow-guiding high-efficiency cooling structure, the spacing L between adjacent outer and inner baffles is 0.5D-2D, where D is the equivalent flow channel diameter. This spacing L affects the distance traveled by the hot air within the heat sink, which in turn affects the heat exchange time. Setting the spacing L between adjacent outer and inner baffles to 0.5-2 times the equivalent flow channel diameter achieves better heat exchange.

[0015] Furthermore, in the aforementioned radiator with a labyrinth-type baffle hole cluster flow-guiding high-efficiency cooling structure, the curvature radius R of the S-shaped flow channel is 100-300 mm. The curvature radius R of the S-shaped flow channel also affects the distance traveled by the hot air within the radiator. Setting the curvature radius R of the S-shaped flow channel to 100-300 mm can achieve better heat exchange effects.

[0016] Furthermore, in the aforementioned radiator with a labyrinth-shaped baffle hole cluster flow-guiding high-efficiency cooling structure, the upper half of the outer cavity is a high-temperature zone, and the lower half is a low-temperature zone. The distribution density of the outer and inner inclined holes is greater in the high-temperature zone than in the low-temperature zone. Because the distribution density of the inclined holes is higher in the high-temperature zone, more hot air passes through the inclined holes, causing greater disturbance of the hot air and improving heat exchange. In the low-temperature zone, the distribution density of the inclined holes is lower, resulting in relatively less flow resistance, further improving heat exchange efficiency.

[0017] Furthermore, in the aforementioned radiator with a labyrinth-type baffle hole cluster flow-guiding high-efficiency cooling structure, the surfaces of the intermediate baffle and the flow-guiding baffle are provided with a wear-resistant coating. This coating can reduce wear. Furthermore, the wear-resistant coating is preferably a silicon carbide coating. Silicon carbide coatings offer the advantages of both wear resistance and low thermal resistance.

[0018] Furthermore, in the radiator with the aforementioned labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure, the outer baffles and the inner baffles are made of aluminum alloy and the surfaces are anodized, thereby making the baffle assembly durable.

[0019] For the motor, the present invention provides the following technical solutions:

[0020] A motor comprises a base and a rotor and a stator arranged in the base; the radiator of the present invention is provided on the top of the base; the base is connected to the shell of the radiator through an opening structure at the top; a centrifugal fan is provided on the side of the base, the impeller of the centrifugal fan is transmission-connected to the rotating shaft of the motor, and the outlet of the centrifugal fan is connected to the inlet of a tube bundle.

[0021] Compared to existing technologies, the motor of the present invention utilizes a radiator with a labyrinth-shaped baffle hole cluster diversion-type, efficient cooling structure. Specific baffles and baffles are placed inside the radiator housing to form an S-shaped labyrinth flow channel, extending contact time. At the same time, inclined holes are placed on the baffles to form an inclined hole cluster, inducing multi-scale turbulence and disrupting the continuity of the thermal boundary layer. The synergistic effect of the S-shaped labyrinth flow channel and the inclined hole cluster increases the heat transfer coefficient, thereby improving heat dissipation efficiency. Furthermore, the structural design without blind spots reduces the risk of impurity deposition. Furthermore, the motor of the present invention rationally arranges the fan and radiator, resulting in a compact overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a motor in an embodiment of the present application;

[0023] Figure 2 Schematic diagram (cross-sectional view) of the motor-fan system structure of an embodiment of the present application;

[0024] Figure 3 Schematic diagram of the flow path of the airflow inside the motor when the motor of the present invention is working;

[0025] Figure 4 This is a schematic diagram of the structure of the outer baffles of the present invention (top view)

[0026] Figure 5 is a cross-sectional view of the outer baffle of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the inner baffle in the present invention (top view)

[0028] Figure 7 It is a cross-sectional view of the inner baffle in the present invention.

[0029] The markings in the accompanying drawings are as follows: 1-shell; 2-tube bundle; 3-middle partition; 4-guide partition; 5-external baffle, 501-external inclined hole; 6-inner baffle, 601-inner inclined hole; 7-machine base; 8-centrifugal fan. DETAILED DESCRIPTION

[0030] The present invention is further described below with reference to the accompanying drawings and examples, but is not intended to limit the present invention. Any details not described in the following examples are common technical knowledge in the art.

[0031] Example (see Figure 1-3 ):

[0032] This embodiment provides a motor that adopts the radiator of the labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure of the present invention.

[0033] In the embodiment, the motor includes a base 7 and a rotor and a stator arranged in the base 7; a radiator with a labyrinth-type baffle hole group guide-type high-efficiency cooling structure is provided on the top of the base 7.

[0034] In the embodiment, a radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure comprises a shell 1 with an opening at the bottom, and a tube bundle 2 arranged inside the shell 1; the two ends of the tube bundle 2 are respectively matched with the end plates on both sides of the shell 1; a centrifugal fan 8 is provided on the side of the shell 1, and the outlet of the centrifugal fan 8 is connected to the outlet of the tube bundle 2; a middle partition 3 is provided in the shell 1, and the middle partition 3 divides the internal space of the shell 1 into two independent heat exchange chambers; a guide partition 4 is provided in the heat exchange chamber, and the guide partition 4 The heat exchange chamber is divided into an inner cavity and an outer cavity; the height of the guide baffle 4 is lower than that of the middle baffle 3, so that the inner cavity and the outer cavity of the heat exchange chamber are connected at the top position; a baffle assembly is provided in the outer cavity to form an S-shaped labyrinth flow channel; the baffle assembly is composed of cross-distributed outer baffles 5 and inner baffles 6, the outer baffles 5 are provided with outer inclined holes 501 inclined toward the outside in groups, and the inner baffles 6 are provided with inner inclined holes 601 inclined toward the inside in groups; the outer inclined holes 501 and the inner inclined holes 601 form an inclined hole group. The setting of the inclined hole group allows part of the hot air to pass through the baffle from the inclined holes, thereby disturbing the airflow, inducing multi-scale turbulence, and destroying the continuity of the thermal boundary layer. The synergistic effect of the S-shaped labyrinth flow channel and the inclined hole group increases the heat transfer coefficient, thereby improving the heat dissipation efficiency. At the same time, the inclined hole group eliminates dead corners in the flow channel.

[0035] In the embodiment, the base 7 is connected to the housing 1 of the radiator through an opening structure at the top thereof; the centrifugal fan 8 is provided on the side of the base 7, and the impeller of the centrifugal fan 8 is transmission-connected to the rotating shaft 9 of the motor;

[0036] In the embodiment, the outer baffle 5 is fixed on the end plate on the side of the shell 1 , and the inner baffle 6 is fixed on the guide baffle 4 .

[0037] In an embodiment, the inclination angle of the outer inclined hole 501 and the inner inclined hole 601 is 45°.

[0038] In an embodiment, the diameter of the outer oblique hole 501 and the inner oblique hole 601 is 4 mm.

[0039] In the embodiment, the distance L between adjacent outer baffles 5 and inner baffles 6 is 80 mm, the equivalent diameter D of the flow channel is 50 mm, and the bending radius R of the S-shaped flow channel is 1500 mm.

[0040] In an embodiment, the upper half of the outer cavity is a high-temperature zone, and the lower half is a low-temperature zone; the distribution density of the outer inclined holes 501 and the inner inclined holes 601 is greater in the high-temperature zone than in the low-temperature zone. A plurality of rows of outer inclined holes 501 are evenly provided on the outer baffle 5, and a plurality of rows of inner inclined holes 601 are evenly provided on the inner baffle 6. In the high-temperature zone, the row spacing between two adjacent rows of inclined holes (outer inclined holes 501, inner inclined holes 601) is 80 mm, and the hole spacing between two adjacent inclined holes in each row is 8 mm. In the low-temperature zone, the row spacing between two adjacent rows of inclined holes (outer inclined holes 501, inner inclined holes 601) is 100 mm, and the hole spacing between two adjacent inclined holes in each row is 12 mm.

[0041] In the embodiment, the surfaces of the middle partition plate 3 and the guide partition plate 4 are provided with a wear-resistant coating, which is a silicon carbide coating with a thickness of 0.2 mm.

[0042] In the embodiment, the outer baffle 5 and the inner baffle 6 are made of aluminum alloy, and the surface is anodized.

[0043] During operation, the motor shaft drives the impeller of the centrifugal fan 8 to rotate, and the external cold air is sent into the tube bundle of the radiator under the action of the centrifugal fan 8. The air inside the motor rises due to the increase in temperature and enters the inner cavity of the radiator, and then flows into the outer cavity. The hot air flows in the heat exchange cavity, exchanges heat with the cold air in the tube bundle 2 to achieve cooling, and then flows back to the inside of the motor to achieve efficient heat dissipation of the motor.

[0044] Comparative Example 1:

[0045] Different from the above-mentioned embodiment of the present invention, no baffle assembly is provided in Comparative Example 1. The hot air flow process is shorter.

[0046] Comparative Example 2:

[0047] Different from the above-mentioned embodiment of the present invention, no inclined holes are provided on the baffle in Comparative Example 2. Compared with Comparative Example 1, Comparative Example 2 has a longer hot air flow path.

[0048] Comparative Example 2 incorporates a baffle assembly, resulting in a longer hot air flow path and a slightly improved heat exchange effect compared to Comparative Example 1, but not significantly. The present invention incorporates inclined holes in the baffles to form a specific inclined hole cluster, inducing multiscale turbulence and disrupting the continuity of the thermal boundary layer. This significantly improves the heat exchange effect, eliminates dead zones, and is less likely to cause impurity deposition. The radiator's heat dissipation performance can be maintained stable over the long term.

[0049] The above general description of the invention and the description of its specific embodiments involved in this application should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art may, without violating the constituent elements of the invention involved, add, subtract, or combine the disclosed technical features in the above general description and / or specific embodiments (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. A radiator with a labyrinth-type baffle hole group flow-guiding type high-efficiency cooling structure, comprising a shell (1) with an opening at the bottom, and a tube bundle (2) arranged inside the shell (1); the two ends of the tube bundle (2) respectively cooperate with the end plates on both sides of the shell (1); a centrifugal fan (8) is provided on the side of the shell (1), and the outlet of the centrifugal fan (8) is connected to the inlet of the tube bundle (2); Its characteristics are: The shell (1) is provided with a middle partition (3), and the middle partition (3) divides the internal space of the shell (1) into two independent heat exchange chambers; the heat exchange chamber is provided with a flow guide partition (4), and the flow guide partition (4) divides the heat exchange chamber into an inner cavity and an outer cavity; the height of the flow guide partition (4) is lower than the height of the middle partition (3), so that the inner cavity and the outer cavity of the heat exchange chamber are connected at the top position; the outer cavity is provided with a baffle assembly to form an S-shaped labyrinth flow channel; the baffle assembly is composed of cross-distributed outer baffles (5) and inner baffles (6), the outer baffles (5) are provided with outer inclined holes (501) inclined toward the outside in groups, and the inner baffles (6) are provided with inner inclined holes (601) inclined toward the inside in groups; the outer inclined holes (501) and the inner inclined holes (601) form an inclined hole group.

2. The radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to claim 1, characterized in that: The outer baffle (5) is fixedly arranged on the end plate on the side of the shell (1), and the inner baffle (6) is fixedly arranged on the guide baffle (4).

3. The radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to claim 1, characterized in that: The inclination angles of the outer inclined hole (501) and the inner inclined hole (601) are 30°-60°.

4. The radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to claim 1, characterized in that: The diameters of the outer oblique hole (501) and the inner oblique hole (601) are 3-8 mm.

5. The radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to claim 1, characterized in that: The distance L between adjacent outer baffles (5) and inner baffles (6) is 0.5D-2D, where D is the equivalent diameter of the flow channel.

6. The radiator with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to claim 5, characterized in that: The bending radius R of the S-shaped flow channel is 100-300 mm.

7. The heat sink with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to any one of claims 1 to 6, characterized in that: The upper half of the outer cavity is a high-temperature zone, and the lower half is a low-temperature zone; the distribution density of the outer inclined holes (501) and the inner inclined holes (601) is greater in the high-temperature zone than in the low-temperature zone.

8. The heat sink with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to any one of claims 1 to 6, characterized in that: The surfaces of the middle baffle (3) and the guide baffle (4) are provided with a wear-resistant coating.

9. The heat sink with a labyrinth-type baffle hole group flow-guiding high-efficiency cooling structure according to any one of claims 1 to 6, characterized in that: The outer baffle (5) and the inner baffle (6) are made of aluminum alloy, and their surfaces are anodized.

10. A motor comprising a base (7) and a rotor and a stator arranged in the base (7); characterized in that: The top of the machine base (7) is provided with the radiator according to claim 1; the machine base (7) is connected to the housing (1) of the radiator through the opening structure at the top; the centrifugal fan (8) is provided on the side of the machine base (7), and the impeller of the centrifugal fan (8) is transmission-connected to the rotating shaft (9) of the motor.

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