Heat dissipation structure of food processor base

Abstract

The utility model discloses a heat dissipation structure of a food processor base, which comprises a base shell, a motor and a control circuit board, the motor and the control circuit board are arranged in the base shell, the motor comprises a motor main body and a driving shaft which penetrates out to a mounting seat at the top of the base and is provided with a coupler, the motor is a brushless motor, and the lower end of the driving shaft is connected with a fan. The fan rotates along with the driving shaft to roll air to form an air channel blowing downwards, and the control circuit board is arranged below the fan and transversely arranged on the air channel. The brushless motor is selected as the motor and is low in temperature rise and small in size, so that enough space can be provided for arranging the control circuit board below the fan, the layout that the motor, the fan and the control circuit board are sequentially arranged from top to bottom is formed, and a single air channel blowing downwards is formed by rolling air through the fan; the air flow in the air duct simultaneously takes away heat of the motor and the control circuit board to achieve the purpose of heat dissipation, the internal structure of the base is simpler, and the size and the occupied space of the base can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of cooking machines, in particular to a heat dissipation structure of a cooking machine base. Background Art

[0002] A cooking machine is a common household appliance in the kitchen for assisting cooking. It includes a base and a cooking cup. The cooking cup is installed on the base, and a stirring knife is arranged in the cooking cup and is in transmission connection with a driving motor in the base through a transmission knife seat, and stirs and crushes the food ingredients in the cooking cup under the drive of the driving motor. When the driving motor and the electronic control components in the base are working, heat energy is generated due to work done, and the high temperature generated by the accumulation of heat energy will damage the electronic components. Therefore, it is necessary to dissipate heat from the driving motor and the electronic control components.

[0003] In the prior art, a fan is arranged below the driving motor and is synchronously driven by the motor shaft of the driving motor. The driving motor and the electronic control components are arranged side by side. In order to achieve a better heat dissipation effect, double air ducts arranged side by side are adopted to dissipate heat from the driving motor and the electronic control components respectively. The motor and the fan are in the same air duct. Generally, the air enters from the air duct where the electronic control components are located, then enters the air duct where the motor is located, and finally the fan sucks the air flow and blows it out of the base. This kind of air duct structure occupies a large lateral area of the base, resulting in a bloated base volume and a complex internal structure. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a heat dissipation structure of a cooking machine base.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A heat dissipation structure of a cooking machine base includes a base housing and a motor and a control circuit board placed in the base housing. The motor includes a motor main body and a drive shaft that passes through to the mounting seat at the top of the base and is provided with a coupling. The motor is a brushless motor. A fan is connected to the lower end of the drive shaft. The fan rotates with the drive shaft to roll up air to form a downward blowing air duct. The control circuit board is arranged below the fan and transversely across the air duct.

[0007] An installation column extending downward is arranged in the base housing, and the bottom end of the installation column is connected with an installation bracket for fixing the motor and the control circuit board.

[0008] The installation bracket includes an installation platform and connecting columns arranged at the edge of the installation platform. An installation lug is arranged on the side of the motor main body and is sleeved on the installation column. The connecting column and the installation column are fixed through a through fastener and the installation lug is limited on the installation column. The installation platform is located below the motor main body and is provided with a ventilation opening that penetrates up and down corresponding to the fan. An installation cavity for accommodating the control circuit board is formed on the bottom surface of the installation platform.

[0009] A shock-absorbing rubber ring is mounted on the inner hole of the mounting lug. The shock-absorbing rubber ring has upper and lower end surfaces covering the upper and lower surfaces of the mounting lug. The shock-absorbing rubber ring is clamped between the mounting lug and the mounting column and between the mounting lug and the end surface of the connecting column.

[0010] The fan is arranged in the ventilation opening.

[0011] The motor body is provided with a motor air inlet on the top and a motor heat dissipation port on the bottom. The edges of the ventilation openings extend upward to form a supporting ring wall that seals against the bottom of the motor body.

[0012] There is a gap between the ventilation opening and the bottom of the motor body to form a ventilation hole.

[0013] The electronic components of the control circuit board are arranged on the bottom surface, and a radiator is provided for the high temperature area.

[0014] The beneficial effects of the present invention are as follows: the motor of the present invention uses a brushless motor, which has a low temperature rise and a small size, so there is enough space to arrange the control circuit board under the fan, forming a layout in which the motor, fan, and control circuit board are arranged in sequence from top to bottom, and the fan rolls the air to form a single air duct that blows downward. The airflow in the air duct takes away the heat of the motor and the control circuit board at the same time to achieve the purpose of heat dissipation. The internal structure of the base is simpler, and the base volume can be reduced to reduce the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural diagram of the base of the utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly of the base of the utility model;

[0018] Figure 3 This is a schematic diagram of the airflow of the first embodiment of the air duct of the utility model;

[0019] Figure 4 This is a schematic diagram of the air flow of the second embodiment of the air duct of the present invention. DETAILED DESCRIPTION

[0020] Reference Figures 1 to 4 A heat dissipation structure of a food processor base includes a base shell 1, a motor 2 and a control circuit board 3 arranged in the base shell 1.

[0021] The motor 2 is a brushless motor, which includes a motor main body 21 and a drive shaft 22 passing through to the mounting seat at the top of the machine base and arranged with a coupling. A fan 4 is connected to the lower end of the drive shaft 22. Since the brushless motor has the characteristics of low temperature rise and small volume, there is enough space below the fan 4 for arranging the drive circuit board. The fan 4 rotates with the drive shaft 22 to roll the air to form a downward blowing air duct. The circuit board is arranged below the fan 4 and transversely across the air duct. The motor 2 is located above the fan 4, and the heat is taken away by the air flowing on the air duct for heat dissipation. At the same time, the air continuously flowing on the air duct will directly blow to the control circuit board 3 to take away its heat to achieve heat dissipation, realizing the synchronous heat dissipation of the motor 2 and the control circuit board 3.

[0022] As a preferred solution of the present invention, in order to obtain the arrangement of the motor 2, the fan 4, and the drive circuit board from top to bottom, the form of hoisting the motor 2 by a bracket is adopted. An installation column 12 extending downward is provided in the machine base shell 1, and an installation bracket 5 for fixing the motor 2 and the control circuit board 3 is connected to the bottom end of the installation column 12. Specifically, the installation bracket 5 includes an installation platform 51 and connection columns 52 arranged at the edge of the installation platform 51. An installation lug 211 is provided on the side of the motor main body 21 and sleeved on the installation column 12. The connection column 52 and the installation column 12 are fixed by a through fastener and the installation lug 211 is limited on the installation column 12 to realize the hoisting of the motor 2. The installation platform 51 is located below the motor main body 21 and is provided with a ventilation opening 53 that penetrates up and down corresponding to the fan 4. An installation cavity 54 for accommodating the control circuit board 3 is formed on the bottom surface of the installation platform 51. After the control circuit board 3 is installed in the installation cavity 54, it is arranged below the fan 4.

[0023] As a further preferred solution, the fan 4 is arranged in the ventilation opening 53. On the one hand, it is beneficial to compress the space between the control circuit board 3 and the motor 2. On the other hand, it is beneficial to realize the transformation of the air duct.

[0024] As a first embodiment of the air duct, an air inlet 23 of the motor is provided at the top of the motor main body 21, and an air outlet 24 for motor heat dissipation is also provided at the bottom. A heat dissipation channel inside the motor 2 is formed between the air inlet 23 of the motor and the air outlet 24 for motor heat dissipation. The edge of the ventilation opening 53 extends upward to form a support ring wall 55 that is hermetically abutted against the bottom of the motor main body 21. At this time, the heat dissipation channel inside the motor 2 is hermetically communicated with the ventilation opening 53, and the air flow in the air duct formed above the fan 4 completely passes through the inside of the motor 2 to quickly take away the working heat of the motor 2.

[0025] As a second embodiment of the air duct, a gap exists between the ventilation opening 53 and the bottom of the motor body 21 to form a ventilation port 6. At this time, the motor body 21 can also have a heat dissipation channel formed between the motor air inlet 23 and the motor heat dissipation port 24. However, a part of the air flow in the air duct formed above the fan 4 passes through the motor body 21 to dissipate heat from the motor 2, and the other part directly enters the ventilation opening 53 through the ventilation port 6 and directly blows towards the control circuit board 3, providing cooler air for the control circuit board 3 to achieve more efficient heat dissipation.

[0026] Preferably, the electronic components of the control circuit board 3 are arranged on the bottom surface, and the electronic components with higher heat generation are concentratedly arranged according to the heat generation amount to form a high-temperature area. A heat sink 31 is provided for the high-temperature area towards the cavity part of the machine base housing 1, and the heat is quickly dissipated into the inner cavity of the machine base housing 1 through the heat sink 31. The machine base housing 1 is provided with a ventilation window communicating with the outside, and the fan 4 fans the air flow to achieve heat dissipation convection with the outside through the ventilation window.

[0027] Preferably, a shock-absorbing rubber ring 212 is sleeved on the inner hole of the mounting lug 211. The shock-absorbing rubber ring 212 has upper and lower end faces covering the upper and lower surfaces of the mounting lug 211. The shock-absorbing rubber ring 212 is clamped between the mounting lug 211 and the mounting post 12 and between the mounting lug 211 and the end face of the connecting post 52, so that the connections of the mounting lug 211 are all soft connections, thereby reducing the vibration generated when the motor 2 operates.

[0028] The motor 2, the fan 4, and the control circuit board 3 of the present utility model are arranged in sequence from top to bottom, and a single air duct for blowing air downward is formed by the fan 4 rolling the air. The air flow in the air duct takes away the heat of both the motor 2 and the control circuit board 3 to achieve the purpose of heat dissipation. The internal structure of the machine base is simpler, and the volume of the machine base can be reduced to reduce the occupied space.

Claims

1. A heat dissipation structure for a cooking machine base, comprising a base housing (1), a motor (2) and a control circuit board (3) disposed in the base housing (1). The motor (2) includes a motor main body (21) and a drive shaft (22) that penetrates to the mounting seat at the top of the base and is provided with a coupling. It is characterized in that: The motor (2) is a brushless motor. A fan (4) is connected to the lower end of the drive shaft (22). The fan (4) rotates with the drive shaft (22) to roll up air to form an air duct for blowing downward. The control circuit board (3) is arranged below the fan (4) and transversely across the air duct.

2. The heat dissipation structure according to claim 1, wherein: An installation post (12) extending downward is provided inside the machine base housing (1). The bottom end of the installation post (12) is connected to an installation bracket (5) for fixing the motor (2) and the control circuit board (3).

3. The heat dissipation structure according to claim 2, wherein: The installation bracket (5) includes an installation platform (51) and connection posts (52) arranged at the edge of the installation platform (51). An installation lug (211) is provided on the side of the motor main body (21) and is sleeved on the installation post (12). The connection post (52) and the installation post (12) are fixed by a through fastener to limit the installation lug (211) on the installation post (12). The installation platform (51) is located below the motor main body (21) and is provided with a ventilation opening (53) that penetrates up and down corresponding to the fan (4). An installation cavity (54) for accommodating the control circuit board (3) is formed on the bottom surface of the installation platform (51).

4. The heat dissipation structure according to claim 3, wherein: A shock-absorbing rubber ring (212) is sleeved on the inner hole of the installation lug (211). The shock-absorbing rubber ring (212) has upper and lower end faces covering the upper and lower surfaces of the installation lug (211). The shock-absorbing rubber ring (212) is clamped between the installation lug (211) and the installation post (12) and between the installation lug (211) and the end face of the connection post (52).

5. The heat dissipation structure according to claim 3, wherein: The fan (4) is arranged in the ventilation opening (53).

6. The heat dissipation structure according to claim 5, characterized in that: An air inlet (23) is provided at the top of the motor main body (21), and an air outlet for motor heat dissipation (24) is also provided at the bottom. The edge of the ventilation opening (53) extends upward to form a support ring wall (55) that seals and abuts against the bottom of the motor main body (21).

7. The heat dissipation structure according to claim 5, wherein: A gap exists between the ventilation opening (53) and the bottom of the motor main body (21) to form a ventilation port (6).

8. The heat dissipation structure according to claim 1, wherein: The electronic components of the control circuit board (3) are arranged on the bottom surface, and a radiator (31) is provided for the high-temperature area.

Images