Bottom heat dissipation structure and grinding main machine

Abstract

The utility model discloses a bottom heat dissipation structure and a grinding main machine, and mainly relates to the technical field of grinding machines. Comprising a bottom shell, a concave cavity with an upward opening is formed in the top of the bottom shell, a vortex air channel and an air outlet channel which are communicated with each other are arranged in the concave cavity, the vortex air channel is of a vortex type closed channel structure dispersing outwards from the center of the concave cavity, and the air outlet channel is of a closed channel structure widening in the airflow direction. The inner end of the air outlet channel is communicated with the outer end of the vortex air channel in a butt joint mode, the outer end of the air outlet channel is connected with the inner wall of the concave cavity, air outlet holes communicated with the concave cavity are formed in the position, corresponding to the range of the air outlet channel, of the bottom shell, and cooling fan blades are rotatably installed in the center of the vortex air channel. And a mounting opening penetrating through the top of the vortex air duct is formed above the cooling fan blades. The beneficial effects of the utility model lie in that: can obtain good heat dissipation effect, avoid equipment and obviously improve the air-out noise.

Description

Technical Field

[0001] This utility model relates to the field of grinding mill technology, specifically a bottom heat dissipation structure and a grinding mill host. Background Technology

[0002] A common drawback of existing small household appliances such as grinding mills is their high noise levels and significant temperature rise, leading to inconvenience in use. One of the main factors contributing to the noise is the considerable airflow noise from the heat dissipation system. Sufficient airflow is required to cool the high-speed rotating motor and shafts, but this significantly exacerbates the noise problem, creating a difficult balance between temperature control and noise levels. Utility Model Content

[0003] The purpose of this invention is to provide a bottom heat dissipation structure and a grinding host, which can achieve a good heat dissipation effect, avoid equipment noise, and significantly improve the exhaust noise.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A bottom heat dissipation structure includes a bottom shell with an open-top recessed cavity at the top. The cavity contains a connected vortex duct and an air outlet channel. The vortex duct is a closed vortex-shaped channel structure that expands outward from the center of the cavity. The air outlet channel is a closed channel structure that widens along the airflow direction. The inner end of the air outlet channel is connected to the outer end of the vortex duct, and the outer end of the air outlet channel is connected to the inner wall of the cavity. The bottom shell has air outlet holes connected to the cavity within the range corresponding to the air outlet channel. A cooling fan blade is rotatably mounted in the center of the vortex duct, and an installation port penetrating the top of the vortex duct is provided above the cooling fan blade.

[0006] The concave cavity is provided with a lower air duct plate and an upper air duct plate of corresponding shapes from bottom to top. The bottom side of the lower air duct plate is fixed to the bottom surface of the concave cavity. The lower air duct plate includes a vortex plate and a baffle. The vortex plate extends along a vortex line trajectory that gradually spreads outward from the center of the concave cavity. The inner end of the vortex plate is close to the middle of the concave cavity, and the outer end of the vortex plate is connected to the inner wall of the concave cavity. The vortex plate forms a vortex air duct. The inner end of the baffle plate is connected to the outermost vortex plate, and the outer end of the baffle plate is connected to the inner wall of the concave cavity, so that the baffle plate and the vortex plate form an air outlet channel. The bottom side of the upper air duct plate is fixedly connected to the top side of the lower air duct plate. The top of the upper air duct plate is provided with an upper sealing plate. The shape of the upper sealing plate corresponds to the outer edge contour of the upper air duct plate. Therefore, the upper sealing plate seals the top of the vortex air duct and the air outlet channel. The mounting port is located in the middle of the sealing plate.

[0007] The bottom side of the upper air duct plate is provided with a fixing slot, and the top side of the lower air duct plate is inserted into the fixing slot.

[0008] The upper air duct plate has an upper slot on its outer side wall. The upper slot has a groove at the bottom and a support block is inserted into it. The bottom end of the support block is in contact with the bottom surface of the cavity.

[0009] The upper sealing plate is flush with the top side of the bottom shell.

[0010] A guide plate is provided near the air outlet in the air outlet channel. There are multiple guide plates, which are arranged opposite to the air outlet channel and are arranged in a parallel manner. Adjacent guide plates form a diversion channel, and a vertical pole is provided in the diversion channel.

[0011] The air guide plate has an arc-shaped guide surface that bends towards the baffle at its inner end near the vortex air duct.

[0012] The diversion channel includes multiple alternating expansion sections and narrowing sections, the cross-sectional space of the narrowing section is smaller than that of the expansion section, and the upright is located in the middle of the expansion section.

[0013] A grinding mill host includes a host, the host including a housing, the bottom of the housing having a bottom opening, the opening being fixedly connected to the bottom shell of the bottom heat dissipation structure.

[0014] The housing contains a motor mount, in which a motor and a rotating shaft are installed. The bottom end of the rotating shaft is connected to a cooling fan blade. The bottom of the motor mount has a lower interface that mates with the mounting port.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The cooling fan blades efficiently draw airflow into the vortex duct, and based on the rationally planned vortex duct, the efficient and smooth airflow is guided through the expanded air outlet channel, which slows down and decelerates the airflow, so that the hot airflow is discharged gently and evenly, significantly reducing the noise of the exhaust and achieving a good heat dissipation effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the bottom shell of this utility model.

[0018] Figure 2 This is a top view of the bottom shell of this utility model.

[0019] Figure 3 This is a top perspective view of the bottom shell of this utility model.

[0020] Figure 4 This is a utility model Figure 2 BB cross-sectional diagram.

[0021] Figure 5 This is a disassembled schematic diagram of the upper air duct plate of this utility model.

[0022] Figure 6 This is a schematic diagram of the internal structure of the whole machine application of this utility model.

[0023] Figure 7 This is a bottom view of the upper air duct plate of this utility model.

[0024] The labels shown in the attached diagram:

[0025] 1. Housing; 2. Circuit board; 3. Rotating shaft; 4. Bottom shell; 6. Screw post; 7. Lower air duct plate; 8. Baffle; 9. Vortex air duct; 10. Air outlet duct; 11. Air outlet hole; 12. Upper air duct plate; 13. Upper sealing plate; 14. Air guide plate; 15. Upright pole; 16. Guide curved surface; 17. Expansion section; 18. Narrowing section; 19. Upper slot; 20. Support block; 21. Mounting port; 22. Cooling fan blade; 23. Motor base; 24. Lower interface. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0027] Example:

[0028] Includes a main unit, which is mainly used to provide rotational kinetic energy to the grinding cup. It is usually used in conjunction with the grinding cup. The main unit and the grinding cup can be fixed or can adopt a detachable split structure.

[0029] The main unit includes a closed housing 1. The top of the housing 1 is provided with a plate 2 that closes the housing 1. A rotating shaft 3 is rotatably mounted to the plate 2 through the center of the plate 2 via a bearing. The top of the rotating shaft 3 is used to install a cutter head. Depending on the connection method between the main unit and the grinding cup, the cutter head and the rotating shaft 3 can be fixedly installed or detachably plugged in to transmit torque.

[0030] The bottom of the housing 1 has a bottom opening, and a bottom shell 4 is fixedly connected to the opening. The bottom of the bottom shell 4 has three fixed feet, which are evenly distributed on the edge of the bottom shell 4. The bottom shell 4 has an upward-opening cavity. The edge of the cavity is engaged with the opening and can be reinforced by adhesive and screws. The bottom shell 4, the housing 1, and the plate 2 together form a closed main unit outer shell structure.

[0031] The specific fixing structure can be as follows: the bottom side of the housing 1 has three upper bolt seats in a ring array, and the bottom edge of the bottom housing 4 has three sets of screw posts 6 in a ring array. The screw posts 6 have a cavity on the bottom surface of the bottom housing 4 to facilitate the installation of fixing bolts at the bottom. The screw posts 6 are provided with fixing bolts that pass through them. The fixing bolts are threadedly connected to the upper bolt seats to fix the housing 1 and the bottom housing 4.

[0032] The concave cavity is provided with a lower air duct plate 7, which is vertically installed. The lower air duct plate 7 includes a vortex plate and a baffle plate 8. The vortex plate extends along a vortex line trajectory that gradually spreads outward from the center of the concave cavity. The inner end of the vortex plate is close to the center of the concave cavity, and the outer end of the vortex plate is connected to the inner wall of the concave cavity. The vortex plate forms a vortex air duct 9. The inner end of the baffle plate 8 is connected to the outermost vortex plate, and the outer end of the baffle plate 8 is connected to the inner wall of the concave cavity. The baffle plate 8 and the outermost part of the vortex plate cooperate to form an air outlet channel 10. An air outlet hole 11 is provided on the bottom side wall. The air outlet hole 11 is located within the air outlet channel 10 formed by the baffle plate 8 and the vortex plate. The outer end of the air outlet channel 10 is the end that connects to the concave cavity, which is significantly larger than the inner end of the air outlet channel 10 that connects to the vortex air duct 9. This makes the air outlet channel 10 a gradually widening and expanding air chamber structure along the airflow direction. When the airflow flows in the air outlet channel 10, it will slow down and decrease in speed as the space increases.

[0033] An upper air duct plate 12 is provided above the lower air duct plate 7 and is fixedly installed thereon. The upper air duct plate 12 corresponds to the shape of the lower air duct plate 7 vertically. The top of the upper air duct plate 12 is provided with an upper sealing plate 13. The shape of the upper sealing plate 13 corresponds to the outer edge of the upper air duct plate 12, that is, it corresponds to the shape of the vortex air duct 9 and the air outlet air duct. The bottom side of the upper air duct plate 12 is fixedly connected to the top side of the lower air duct plate 7, forming a complete and closed vortex air duct 9 and air outlet channel 10.

[0034] The upper sealing plate 13 is flush with the top side of the bottom shell 4, so that the height of the vortex air duct 9 and the air outlet duct 10 is consistent with the height of the concave cavity, and the air outlet hole 11 on the side wall of the concave cavity can fully disperse the airflow in the air outlet duct 10, so that the exhaust is smooth.

[0035] An air guide plate 14 and a vertical rod 15 are provided in the air outlet duct 10 near the air outlet 11. The top ends of the air guide plate 14 and the vertical rod 15 are fixedly connected to the bottom surface of the upper sealing plate 13. The upper sealing plate 13, the upper air duct plate 12, the air guide plate 14 and the vertical rod 15 are an integral injection molded part.

[0036] Five air guide plates 14 are arranged in the direction of extension relative to the air outlet channel 10. The air guide plate 14 has an arc-shaped guide surface 16 that bends towards the baffle 8 at its inner end near the vortex air duct 9, which can effectively guide the airflow towards the baffle 8, allowing the airflow to be evenly distributed from the channel between the air guide plates 14. Adjacent air guide plates 14 form a distribution channel. Through the curved surfaces on both sides of the air guide plate 14, the distribution channel is composed of multiple alternating expansion sections 17 and narrowing sections 18. As shown in the example in this figure, it includes 3 sets of expansion sections 17 and 2 narrowing sections 18, and the upright 15 is centrally located in the expansion section 17, so that the airflow is fully dispersed and distributed, achieving a gentle airflow and a low noise reduction effect.

[0037] The bottom side of the upper air duct plate 12 is provided with a fixing slot, and the top side of the lower air duct plate 7 is inserted into the fixing slot. It can also be fixed by other common fixing methods such as snap-fit ​​and adhesive.

[0038] The upper air duct plate 12 has an upper slot 19 on its outer ring side wall. The upper slot 19 has a groove at the bottom. A support block 20 is inserted into the upper slot 19. The bottom end of the support block 20 contacts the bottom surface of the cavity and is used to provide auxiliary support for the upper air duct plate 12 and disperse the pressure of the upper air duct plate 12 on the top side of the lower air duct plate 7.

[0039] The upper sealing plate 13 has a circular mounting port 21 in the center. The mounting port 21 has a cylindrical structure. A heat dissipation fan blade 22 is installed inside the mounting port 21. The heat dissipation fan blade 22 is driven to rotate by a motor installed in the host to push airflow.

[0040] The sealing plate has multiple mounting holes, four of which are evenly distributed relative to the mounting opening 21. Above the upper sealing plate 13, a motor mount 23 is fixedly mounted. The motor mount 23 houses a motor for driving the rotating shaft 3. The bottom end of the rotating shaft 3 is mounted to the cooling fan blades 22. The motor mount 23 has a closed structure, and its bottom has a lower interface 24 that seals against the mounting opening 21. Support columns are located around the bottom of the motor mount 23, with their bottom ends inserted into the mounting holes for support and positioning.

[0041] Based on the above structure, both the upper air duct plate 12 and the lower air duct plate 7 form a closed and complete vortex air duct 9. The cooling fan blades 22 rotate at high speed in the center of the vortex air duct 9, guiding the hot air in the center outward through the vortex air duct 9 and exhausting it through the air outlet channel 10 and the air outlet hole 11. The exhaust airflow and heat dissipation effect is excellent. Furthermore, the exhaust airflow passes through the guide plate and the upright 15 located at the air outlet hole 11, and through the expansion of the air outlet channel 10, it can effectively reduce the wind speed, achieve uniform airflow and dispersion, make the exhaust airflow gentle, and significantly reduce noise.

Claims

1. A bottom heat dissipation structure, characterized in that, The device includes a bottom shell, the top of which has an open-topped cavity. The cavity contains a connected vortex duct and an air outlet channel. The vortex duct is a closed, vortex-shaped channel structure that expands outwards from the center of the cavity. The air outlet channel is a closed channel structure that widens along the airflow direction. The inner end of the air outlet channel is connected to the outer end of the vortex duct, and the outer end of the air outlet channel is connected to the inner wall of the cavity. The bottom shell has air outlet holes connected to the cavity within the range corresponding to the air outlet channel. A rotatable cooling fan blade is mounted in the center of the vortex duct, and an installation port penetrating the top of the vortex duct is located above the cooling fan blade.

2. The bottom heat dissipation structure according to claim 1, characterized in that, The concave cavity is provided with a lower air duct plate and an upper air duct plate of corresponding shapes from bottom to top. The bottom side of the lower air duct plate is fixed to the bottom surface of the concave cavity. The lower air duct plate includes a vortex plate and a baffle. The vortex plate extends along a vortex line trajectory that gradually spreads outward from the center of the concave cavity. The inner end of the vortex plate is close to the middle of the concave cavity, and the outer end of the vortex plate is connected to the inner wall of the concave cavity. The vortex plate forms a vortex air duct. The inner end of the baffle plate is connected to the outermost vortex plate, and the outer end of the baffle plate is connected to the inner wall of the concave cavity, so that the baffle plate and the vortex plate form an air outlet channel. The bottom side of the upper air duct plate is fixedly connected to the top side of the lower air duct plate. The top of the upper air duct plate is provided with an upper sealing plate. The shape of the upper sealing plate corresponds to the outer edge contour of the upper air duct plate. Therefore, the upper sealing plate seals the top of the vortex air duct and the air outlet channel. The mounting port is located in the middle of the sealing plate.

3. The bottom heat dissipation structure according to claim 2, characterized in that, The bottom side of the upper air duct plate is provided with a fixing slot, and the top side of the lower air duct plate is inserted into the fixing slot.

4. The bottom heat dissipation structure according to claim 2, characterized in that, The upper air duct plate has an upper slot on its outer side wall. The upper slot has a groove at the bottom and a support block is inserted into it. The bottom end of the support block is in contact with the bottom surface of the cavity.

5. The bottom heat dissipation structure according to claim 2, characterized in that, The upper sealing plate is flush with the top side of the bottom shell.

6. The bottom heat dissipation structure according to claim 1, characterized in that, A guide plate is provided near the air outlet in the air outlet channel. There are multiple guide plates, which are arranged opposite to the air outlet channel and are arranged in a parallel manner. Adjacent guide plates form a diversion channel, and a vertical pole is provided in the diversion channel.

7. The bottom heat dissipation structure according to claim 6, characterized in that, The air guide plate has an arc-shaped guide surface that bends towards the baffle at its inner end near the vortex air duct.

8. The bottom heat dissipation structure according to claim 6, characterized in that, The diversion channel includes multiple alternating expansion sections and narrowing sections, the cross-sectional space of the narrowing section is smaller than that of the expansion section, and the upright is located in the middle of the expansion section.

9. A grinding mill main unit, characterized in that, The device includes a host unit, which includes a housing. The bottom of the housing has a bottom opening, and the opening is fixedly connected to the bottom shell of the bottom heat dissipation structure as described in any one of claims 1-8.

10. A grinding mill host according to claim 9, characterized in that, The housing contains a motor mount, in which a motor and a rotating shaft are installed. The bottom end of the rotating shaft is connected to a cooling fan blade. The bottom of the motor mount has a lower interface that mates with the mounting port.

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