Food processor reliable in heat dissipation

Abstract

The utility model belongs to the technical field of kitchen appliances, and particularly relates to a food processor reliable in heat dissipation, which comprises a main machine and a cup assembly, the cup assembly comprises a cup body, a cup seat fixed at the bottom of the cup body and a variable-frequency brushless motor fixed in the cup seat, a rotating shaft of the variable-frequency brushless motor extends into the cup body and is connected with a crushing cutter, and a power panel is arranged in the main machine. An IPM module is arranged on the power panel, the variable-frequency brushless motor is a variable-frequency brushless motor without a fan, a motor cooling air duct for cooling the variable-frequency brushless motor is arranged in the cup base, an air inlet duct and an air outlet duct are arranged in the main machine, the air inlet duct, the motor cooling air duct and the air outlet duct are sequentially communicated, the power panel is arranged in the air inlet duct, and the power panel is arranged in the air outlet duct. And a cooling fan for blowing air outwards is arranged in the air outlet duct. By arranging the cooling fan in the air outlet duct, on the premise that airflow is driven to flow, hot air after heat exchange can be effectively and rapidly blown out of the host, the cooling effect is improved, the air duct can be prevented from being blocked, and smooth circulation of the airflow is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a food processing machine with reliable heat dissipation. Background Art

[0002] The prior art discloses a food processor capable of achieving heat dissipation of the main unit, comprising a base and a cup body assembly, wherein a main control board is arranged in the base, and the cup body assembly comprises a cup body and a cup seat, wherein the cup seat is provided with a supporting cavity and a motor fixing seat located in the supporting cavity, and the motor is fixed on the motor fixing seat so that the motor and the cup body assembly are connected as one. A fan is arranged in the base, and the fan is used to draw indoor air into the base, and then enters the cup seat through an air inlet pipe to dissipate the heat of the motor. After passing through the motor, the airflow enters the base through the air outlet of the base, and is discharged after passing through the main control board, thereby achieving heat dissipation of the motor and the main control board.

[0003] However, in the above scheme, the setting position of the fan is unreasonable. The fan sucks air into the base, that is, the fan is set at the air inlet of the base. If the suction force of the fan is too small, the airflow is not strong and the heat dissipation effect is not good. If the suction force of the fan is too large, the debris on the work surface will be sucked into the air inlet, causing the air duct to be blocked, the airflow to be poor, and a large heat dissipation noise. At the same time, the air sucked in by the fan will exchange heat with the main control board to form hot air. The fan is set at the air inlet, and the discharge of hot air in the air duct will be disturbed by the internal structure of the main unit, and the discharge is slow. The hot air stays in the main unit for a long time, and the heat dissipation effect is poor.

[0004] In addition, the traditional wall-breaking food processor uses a series-excited motor to achieve drive. The series-excited motor is large in size, resulting in a large size of the whole machine, which is not convenient for users to use. With the continuous development and innovation of technology, the applicant has developed a food processor using a variable frequency brushless motor, including a main machine and a cup assembly that can be detachably mounted on the main machine, wherein a variable frequency brushless motor is installed in the cup holder of the cup assembly. This type of food processor uses a variable frequency brushless motor to achieve drive, which is small in size, has constant and controllable speed and torque, and has low working vibration and low noise, which improves the user experience of the food processor. However, compared with the existing series-excited motor, the variable frequency brushless motor needs to be set on the main control board to achieve drive. The main control board has a strong heat dissipation requirement. If the heat dissipation method of setting a fan alone at the air inlet in the traditional technology is directly adopted, it is necessary to increase the fan suction. However, due to the unreasonable setting position of the fan, directly increasing the fan suction will increase the risk of inhaling debris in the air duct and increase the heat dissipation noise. Otherwise, the heat dissipation requirement of the IPM module cannot be met. Moreover, the air forms hot air after heat exchange through the main control board. The hot air is discharged slowly, stays in the host for a long time, and has poor heat dissipation effect.

[0005] The applicant previously proposed a cooling method that uses the fan of the variable frequency brushless motor to drive the air circulation to dissipate the heat of the main control board. However, this method can only dissipate heat when the motor is working, and the main control board cannot dissipate heat when the motor stops working. For example, when the food processor stops the crushing operation and enters the boiling stage, the airflow cannot circulate in the air duct because the fan stops working. The main control board can only dissipate heat spontaneously, which has a poor cooling effect and low heat dissipation efficiency. Moreover, the motor is inconvenient to use due to the large size of the fan and the high height of the cup assembly, which is not conducive to lowering the center of gravity of the whole machine to improve working stability. Therefore, the system heat dissipation problem of the food processor driven by the variable frequency brushless motor needs further study. Utility Model Content

[0006] The utility model provides a food processing machine with reliable heat dissipation, which uses a variable frequency brushless motor to realize driving and arranges a heat dissipation fan independent of the motor to dissipate heat for a power board and the motor, thereby solving the problem that the power board cannot continuously dissipate heat through airflow, and at the same time optimizes the arrangement position of the heat dissipation fan, thereby further solving the problem that the hot air is discharged slowly in the air duct and the heat dissipation effect is poor.

[0007] The technical solution adopted by the utility model is:

[0008] The utility model provides a food processing machine with reliable heat dissipation, comprising a main machine and a cup assembly detachably mounted above the main machine, the cup assembly comprising a cup body, a cup holder fixed at the bottom of the cup body, and a variable frequency brushless motor fixed in the cup holder, the rotating shaft of the variable frequency brushless motor extends into the cup body and is connected with a crushing knife, the main machine is provided with a power board, the power board is provided with an IPM module electrically connected to the variable frequency brushless motor, the variable frequency brushless motor is a variable frequency brushless motor without a fan, the cup holder is provided with a motor heat dissipation duct for dissipating the heat of the variable frequency brushless motor, the main machine is provided with an air inlet duct and an air outlet duct, the air inlet duct, the motor heat dissipation duct and the air outlet duct are connected in sequence, the power board is arranged in the air inlet duct, and a heat dissipation fan for blowing air outwards is arranged in the air outlet duct.

[0009] A food processor with reliable heat dissipation provided by the present utility model uses a variable-frequency brushless motor for driving. The variable-frequency brushless motor and the IPM module are respectively placed in the cup assembly and the main body. The cup assembly can be flexibly taken and placed relative to the main body, which is convenient for users. Compared with a series-excited motor, the variable-frequency brushless motor is small in size, has a constant and controllable speed and torque, has small working vibration and low noise, which improves the use experience of the food processor. At the same time, the variable-frequency brushless motor is a variable-frequency brushless motor without a fan, which further reduces the volume of the motor and the weight of the cup assembly, making it labor-saving for users to pick up. Based on the strong system heat dissipation requirements of the variable-frequency brushless motor and the IPM module, an air inlet duct, the motor heat dissipation duct, and the air outlet duct are sequentially connected. Among them, a heat dissipation fan for blowing air outwards is provided in the air outlet duct. When the heat dissipation fan blows air outwards, a negative pressure will be formed in the air outlet duct. The cold air outside the main body will flow through the air inlet duct, the motor heat dissipation duct, and the air outlet duct in sequence under the action of the air pressure difference. Since the power board is arranged in the air inlet duct, the cold air can flow through the IPM module to carry away its heat, realizing good heat exchange. The flowing air enters the motor heat dissipation duct to synchronously dissipate heat from the motor. The hot air after heat exchange is discharged from the air outlet duct under the blowing of the heat dissipation fan, realizing cyclic heat dissipation. Since the heat dissipation fan and the variable-frequency brushless motor are independently arranged, even if the variable-frequency brushless motor stops working, the heat dissipation fan can still operate independently, driving the air flow to realize continuous heat dissipation of the motor and the power board. The heat dissipation is persistent, the heat dissipation effect is good, and the heat dissipation efficiency is high. In addition, the heat dissipation fan is arranged in the air outlet duct. On the premise of driving the air flow, it can effectively blow out the hot air after heat exchange from the main body quickly, thus avoiding the hot air staying in the air duct of the main body, which is beneficial to improving the air flow circulation speed and the heat dissipation effect. In addition, the position of the heat dissipation fan is in the air outlet duct instead of the air inlet duct, which can also reduce the probability of sundries being sucked into the air duct due to excessive fan power, thus preventing the air duct from being blocked, realizing smooth air flow, reducing the heat dissipation noise. Moreover, the heat dissipation fan and the power board are respectively arranged in the air outlet duct and the air inlet duct, and their arrangements form an avoidance, realizing the reasonable utilization of the internal space of the main body, with a compact structure and a reasonable layout.

[0010] In a preferred embodiment, a first heat dissipation port communicating with the motor heat dissipation duct is provided at the bottom of the cup base. The first heat dissipation port is docked with the inlet of the air outlet duct, and the heat dissipation fan is arranged at the inlet end of the air outlet duct.

[0011] Since the heat dissipation path formed by the sequential connection of the air inlet duct, the motor heat dissipation duct, and the air outlet duct is very long, the heat dissipation fan is arranged at the inlet end of the air outlet duct, that is, near the middle and lower reaches of the entire heat dissipation path. It can not only increase the flow rate of the inhaled air flow but also increase the flow rate of the hot air blown out, which can further accelerate the air flow circulation and improve the heat dissipation efficiency and reduce the driving energy consumption on the basis of avoiding sucking sundries into the air duct.

[0012] More preferably, the main body is provided with a supporting top wall for supporting the cup assembly. The supporting top wall is provided with a docking port to form an inlet of the air outlet duct, and the cooling fan is fixed to the supporting top wall.

[0013] More preferably, a wind guide cylinder is arranged in the main body, and a docking port is arranged on the supporting top wall of the main body. One end of the wind guide cylinder is communicated with the docking port, and the other end is communicated with the outside to form the air outlet duct. The cooling fan is fixed at one end of the wind guide cylinder close to the docking port or the cooling fan is clamped between the wind guide cylinder and the supporting top wall.

[0014] Whether the cooling fan is fixed on the supporting top wall, the end of the wind guide cylinder or clamped and fixed by the wind guide cylinder and the supporting top wall, reliable fixation of the cooling fan can be achieved, so that the cooling fan can be firmly arranged in the air outlet duct, effectively driving the air flow circulation to realize heat dissipation. In addition, by arranging the wind guide cylinder to form the air outlet duct, the concentration of the air flow is realized, and the heat dissipation effect is improved.

[0015] In a preferred embodiment, the outlet of the air outlet duct is arranged on the bottom wall or the side wall of the main body, and the cooling fan is arranged at the outlet end of the air outlet duct.

[0016] By arranging the cooling fan at the outlet end of the air outlet channel, negative pressure can be formed at the outlet end, directly sucking the hot air to the outlet for discharge, realizing good heat dissipation. Moreover, it can effectively avoid sucking sundries into the air inlet duct due to increasing the power of the cooling fan, and realize the smooth flow of the air flow in the whole heat dissipation path. The outlet of the air outlet duct is arranged on the bottom wall of the main body, which can avoid scalding users by the blown hot air. If it is arranged on the side wall, the hindrance to the discharge of the hot air can be reduced, realizing smooth heat dissipation.

[0017] In a preferred embodiment, an installation bracket for fixing the power supply board is further arranged in the main body. The installation bracket is provided with an installation slot for accommodating the power supply board, and the installation slot and the bottom wall of the main body enclose the air inlet duct.

[0018] By arranging the installation bracket, the power supply board can be reliably fixed in the main body with the help of the installation bracket, and the installation is convenient. At the same time, the installation bracket is provided with an installation slot for accommodating the power supply board. The installation slot and the bottom wall of the main body enclose the air inlet duct. When the cooling fan works, the air inlet duct concentrates the heat dissipation air flow of the power supply board, so as to guide the heat dissipation air flow to the power supply board, especially the IPM module, increasing the contact area between the cold air and the power supply board, improving the heat dissipation efficiency. The concentrated air flow can more effectively take away the heat generated by the power supply board and the IPM module, reduce the temperature, and ensure the normal operation of the power supply board.

[0019] In a preferred embodiment, the power supply board is horizontally arranged in the air inlet duct, the IPM module protrudes from the upper side of the power supply board, and the inlet of the air inlet duct is opened on the bottom wall of the host and is horizontally offset from the power supply board.

[0020] The power supply board is horizontally arranged in the air inlet duct, making the host structure compact and reducing the height of the host. At the same time, the inlet of the air inlet duct is opened on the bottom wall of the host and is horizontally offset from the power supply board, so that the obstruction of the cold air entering the air inlet duct is reduced, the entering speed of the cold air is increased, and after the cold air enters the air inlet duct, it can flow horizontally along the power supply board and the IPM module, taking away the heat generated by the power supply board and the IPM module, reducing the temperature, and ensuring the normal operation of the power supply board.

[0021] In a preferred embodiment, the power supply board is vertically arranged in the air inlet duct, the IPM module protrudes from one side of the power supply board, and the inlet of the air inlet duct is opened on the bottom wall of the host and is arranged directly below the IPM module.

[0022] The power supply board is vertically arranged in the air inlet duct, and the inlet of the air inlet duct is opened on the bottom wall of the host and is arranged directly below the IPM module. Therefore, after the air flow enters the air inlet duct, it directly flows vertically through the IPM module, realizing more comprehensive heat exchange and avoiding the situation of poor local heat dissipation.

[0023] In a preferred embodiment, an auxiliary fan is arranged in the air inlet duct, and the auxiliary fan blows air into the air inlet duct.

[0024] More preferably, a second heat dissipation port communicating with the motor heat dissipation duct is arranged at the bottom of the cup holder, the outlet end of the air inlet duct is docked with the second heat dissipation port, and the auxiliary fan is arranged at the outlet end of the air inlet duct.

[0025] By adding an auxiliary fan in the air inlet duct, the auxiliary fan and the heat dissipation fan increase the speed of the air flow, so that the air flow flows along the air inlet duct, the motor heat dissipation duct and the air outlet duct, quickly dissipating heat from the motor and the power supply board and improving the heat dissipation efficiency. By arranging the auxiliary fan at the outlet end of the air inlet duct, the probability of the auxiliary fan blowing sundries into the air inlet duct can be reduced, avoiding duct blockage and making the air flow circulation smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0027] Figure 1Schematic diagram of the structure of the food processor in Embodiment 1 of the present utility model;

[0028] Figure 2 Partial cross-sectional view of the food processor in Embodiment 1 of the present utility model;

[0029] Figure 3 Partial cross-sectional view of the food processor from another angle in Embodiment 1 of the present utility model;

[0030] Figure 4 is Figure 3 Partial enlarged schematic view of part A in

[0031] Figure 5 Exploded structure schematic diagram of the main body in Embodiment 1 of the present utility model;

[0032] Figure 6 Partial cross-sectional view of the food processor in Embodiment 4 of the present utility model;

[0033] Figure 7 Exploded structure schematic diagram of the main body in Embodiment 4 of the present utility model.

[0034] Explanation of reference numerals: 10, main body; 101, docking port; 11, housing; 12, base; 121, air outlet; 20, cup assembly; 21, cup body; 22, cup base; 221, first heat dissipation port; 23, variable frequency brushless motor; 24, crushing knife; 30, power supply board; 31, IPM module; 41, motor heat dissipation air duct; 42, air inlet duct; 421, air inlet; 43, air outlet duct; 431, air guide cylinder; 50, heat dissipation fan; 51, card slot; 60, mounting bracket; 70, display board assembly; 80, lower coupler. Detailed implementation manners

[0035] In order to more clearly illustrate the overall concept of the present utility model, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0036] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present utility model and the features in each embodiment can be combined with each other.

[0037] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inside", "outside", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0038] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0040] As Figures 1-5 shown, in one embodiment of the present utility model, a food processor with reliable heat dissipation is provided, which includes a main body 10 and a cup assembly 20 detachably installed above the main body 10. The cup assembly 20 includes a cup body 21, a cup base 22 fixed to the bottom of the cup body 21, and a variable-frequency brushless motor 23 fixed in the cup base 22. The rotating shaft of the variable-frequency brushless motor 23 extends into the cup body 21 and is connected with a crushing knife 24. A power supply board 30 is arranged in the main body 10, and an IPM module 31 electrically connected to the variable-frequency brushless motor 23 is arranged on the power supply board 30. The variable-frequency brushless motor 23 is a variable-frequency brushless motor without a fan. A motor heat dissipation air duct 41 for dissipating heat from the variable-frequency brushless motor 23 is arranged in the cup base 22. An air inlet air duct 42 and an air outlet air duct 43 are arranged in the main body 10. The air inlet air duct 42, the motor heat dissipation air duct 41, and the air outlet air duct 43 are connected in sequence. The power supply board 30 is arranged in the air inlet air duct 42, and a heat dissipation fan 50 for blowing air outwards is arranged in the air outlet air duct 43.

[0041] A food processor with reliable heat dissipation provided by the present utility model is driven by a variable-frequency brushless motor 23. The variable-frequency brushless motor 23 and the IPM module 31 are respectively placed in the cup assembly 20 and the main body 10. The cup assembly 20 can be flexibly taken and placed relative to the main body 10, which is convenient for users to use. Compared with a series-excited motor, the variable-frequency brushless motor 23 is small in volume, its rotation speed and torque are constantly controllable, and it has small working vibration and low noise, which improves the use experience of the food processor. At the same time, the variable-frequency brushless motor 23 is a variable-frequency brushless motor without a fan, which further reduces the volume of the motor and the weight of the cup assembly 20, making it labor-saving for users to pick up.

[0042] Combined Figure 2 with Figure 3 , based on the strong system heat dissipation requirements of the variable-frequency brushless motor 23 and the IPM module 31, an air inlet duct 42, a motor heat dissipation duct 41 and an air outlet duct 43 are set to be connected in sequence. Among them, a heat dissipation fan 50 that blows air outwards is arranged in the air outlet duct 43. When the heat dissipation fan 50 blows air outwards, a negative pressure will be formed in the air outlet duct 43. The cold air outside the main body 10 will flow through the air inlet duct 42, the motor heat dissipation duct 41 and the air outlet duct 43 in sequence under the action of the air pressure difference. The air flow direction is as shown by the arrows in Figure 2 , 3 . Since the power board 30 is arranged in the air inlet duct 42, the cold air can flow through the IPM module 31 to carry away its heat and achieve good heat exchange. The flowing air flow enters the motor heat dissipation duct 41 to synchronously dissipate heat from the motor. The hot air after heat exchange is discharged from the air outlet duct 43 under the blowing of the heat dissipation fan 50, realizing cyclic heat dissipation. Since the heat dissipation fan 50 and the variable-frequency brushless motor 23 are independently arranged, even if the variable-frequency brushless motor 23 stops working, the heat dissipation fan 50 can still operate independently, driving the air flow to flow to continuously dissipate heat from the motor and the power board 30. The heat dissipation is persistent, the heat dissipation effect is good, and the heat dissipation efficiency is high. In addition, the heat dissipation fan 50 is arranged in the air outlet duct 43. On the premise of driving the air flow to flow, it can effectively blow out the hot air after heat exchange from the main body 10 quickly, thus avoiding the hot air staying in the air duct of the main body 10, which is beneficial to improving the air flow circulation speed and the heat dissipation effect. In addition, the position of the heat dissipation fan 50 is in the air outlet duct 43 instead of the air inlet duct 42, which can also reduce the probability of sundries being sucked into the air duct due to excessive fan power, thus preventing the air duct from being blocked, realizing smooth air flow, reducing the heat dissipation noise. Moreover, the heat dissipation fan 50 and the power board 30 are respectively arranged in the air outlet duct 43 and the air inlet duct 42, and their arrangements form an avoidance, realizing the reasonable utilization of the internal space of the main body 10, with a compact structure and a reasonable layout.

[0043] The present utility model does not limit the specific fixing position and fixing method of the heat dissipation fan 50. For example:

[0044] Embodiment Example 1 is as follows Figures 1-5 As shown, a first air outlet 221 communicating with the motor heat dissipation air duct 41 is provided at the bottom of the cup holder 22. The first air outlet 221 is docked with the inlet of the air outlet air duct 43, and the heat dissipation fan 50 is arranged at the inlet end of the air outlet air duct 43.

[0045] Specifically, as shown in Figure 3 、 4 、5, an air guide cylinder 431 is arranged in the main body 10. The main body 10 is provided with a supporting top wall for supporting the cup assembly 20. A docking port 101 is arranged on the supporting top wall of the main body 10. One end (upper end) of the air guide cylinder 431 communicates with the docking port 101, and the other end communicates with the outside to form the air outlet air duct 43. Preferably, the bottom of the air guide cylinder 431 is bent laterally and docked with the lateral air outlet on the main body base to communicate with the outside. In this embodiment example, the heat dissipation fan 50 is fixed at one end of the air guide cylinder 431 close to the docking port. As shown in Figure 4 , a card slot 51 is arranged on the heat dissipation fan 50, and the top end of the air guide cylinder 431 is snapped into the card slot 51.

[0046] Of course, it can be understood that the heat dissipation fan 50 and the air guide cylinder 431 can be fixed not only by using the card slot 51, but also by screws or adhesives, etc.

[0047] Combined with Figure 3 and Figure 5 shown, the main body 10 includes a housing 11 and a base 12. The air guide cylinder 431 is vertically fixed between the housing and the base. Preferably, the bottom of the air guide cylinder 431 is bent to form a lateral outlet, and an air outlet 121 is opened on the side wall of the base 12 to form the outlet of the air outlet air duct 43. The main body 10 further includes a power supply board 30, a mounting bracket 60, a display board assembly 70, and a lower coupler 80 for coupling with the cup assembly 20. The structure of the air inlet air duct 42 and the layout of the power supply board 30 will be described in detail later.

[0048] Embodiment Example 2. The same point of this embodiment example and Embodiment Example 1 is that the heat dissipation fan 50 is arranged at the inlet end of the air outlet air duct 43. The difference is that the heat dissipation fan 50 is clamped between the air guide cylinder 431 and the supporting top wall.

[0049] Embodiment Example 3. The same point of this embodiment example and Embodiment Example 1 is that the heat dissipation fan 50 is arranged at the inlet end of the air outlet air duct 43. The difference is that the supporting top wall is provided with a docking port to form the inlet of the air outlet air duct 43, and the heat dissipation fan 50 is fixed to the supporting top wall. For example, it is fixed by screws, buckles or the card slot 51.

[0050] In Embodiment Examples 1 - 3, since the heat dissipation path formed by the sequential connection of the air inlet duct 42, the motor heat dissipation duct 41, and the air outlet duct 43 is very long, the heat dissipation fan 50 is arranged at the inlet end of the air outlet duct 43, that is, near the middle and lower reaches of the entire heat dissipation path. This can not only increase the flow velocity of the inhaled air but also increase the flow velocity of the hot blown - out air. On the basis of avoiding sucking debris into the duct, it can further accelerate the air flow, improve the heat dissipation efficiency, and reduce the drive energy consumption. Whether the heat dissipation fan 50 is fixed to the support top wall, the end of the air guide cylinder 431, or clamped and fixed between the air guide cylinder 431 and the support top wall, the reliable fixation of the heat dissipation fan 50 can be achieved, enabling the heat dissipation fan 50 to be firmly arranged in the air outlet duct 43 and effectively driving the air circulation to achieve heat dissipation. Additionally, by providing the air guide cylinder 431 to form the air outlet duct 43, the concentration of the air flow is realized, improving the heat dissipation effect.

[0051] Embodiment Example 4, as Figure 6 、 7 shown, the difference between this embodiment example and Embodiment Example 1 is that the heat dissipation fan 50 is arranged at the outlet end of the air outlet duct 43. Optionally, as Figure 6 shown, an air outlet 121 is opened on the side wall of the main unit 10 to form the outlet of the air outlet duct 43. Of course, in fact, the outlet of the air outlet duct 43 can also be opened on the bottom wall of the main unit 10.

[0052] By arranging the heat dissipation fan 50 at the outlet end of the air outlet channel, a negative pressure can be formed at the outlet end, directly sucking the hot air to the outlet for discharge, achieving good heat dissipation. Moreover, it can effectively avoid sucking debris into the air inlet duct 42 due to increasing the power of the heat dissipation fan 50, realizing the smooth flow of air in the entire heat dissipation path. Opening the outlet of the air outlet duct 43 on the bottom wall of the main unit 10 can prevent the hot air from scalding users. If it is set on the side wall, the obstruction to the discharge of hot air can be reduced, achieving smooth heat dissipation.

[0053] In addition, it should be noted that the structure of the air inlet duct 42 of the present utility model is not limited. For example, in Embodiment Example 1 of this embodiment, as Figure 5 shown, an installation bracket 60 for fixing the power supply board 30 is further provided inside the main unit 10. The installation bracket is provided with an installation slot for accommodating the power supply board 30, and the installation slot and the bottom wall of the main unit 10 enclose the air inlet duct 42.

[0054] Combined with Figure 2 、 5 shown, in this embodiment example, the power supply board 30 is horizontally placed in the air inlet duct 42, the IPM module 31 protrudes on the upper side of the power supply board 30, and the inlet of the air inlet duct 42, that is, the air inlet 421, is opened on the bottom wall of the main unit 10 and is horizontally offset from the power supply board 30.

[0055] By setting up the mounting bracket, the power supply board 30 can be reliably fixed in the host 10 with the help of the mounting bracket, and the installation is convenient. At the same time, the mounting bracket is provided with a mounting groove for accommodating the power supply board 30. The mounting groove and the bottom wall of the host 10 enclose an air inlet duct 42. When the cooling fan 50 works, the air inlet duct 42 concentrates the cooling air flow of the power supply board 30, so as to guide the cooling air flow to the power supply board 30, especially the IPM module 31, increase the contact area between the cold air and the power supply board 30, improve the heat dissipation efficiency, and the concentrated air flow can more effectively take away the heat generated by the power supply board 30 and the IPM module 31, reduce the temperature, and ensure the normal operation of the power supply board 30. The power supply board 30 is horizontally arranged in the air inlet duct 42, making the structure of the host 10 compact and reducing the height of the host 10. At the same time, the inlet of the air inlet duct 42 is arranged on the bottom wall of the host 10 and is horizontally staggered from the power supply board 30, so as to reduce the obstruction of the cold air entering the air inlet duct 42 and improve the entering speed of the cold air. After the cold air enters the air inlet duct 42, it can flow horizontally along the power supply board 30 and the IPM module 31, take away the heat generated by the power supply board 30 and the IPM module 31, reduce the temperature, and ensure the normal operation of the power supply board 30.

[0056] It should be noted that the above structure of the air inlet duct 42 and the arrangement method of the power supply board 30 are still applicable to other implementation examples.

[0057] Of course, in addition to the above method for setting the power supply board 30, in other implementation manners, optionally, the power supply board 30 is vertically arranged in the air inlet duct 42, the IPM module 31 protrudes on one side of the power supply board 30, and the inlet of the air inlet duct 42 is arranged on the bottom wall of the host 10 and is disposed directly below the IPM module 31.

[0058] The power supply board 30 is vertically arranged in the air inlet duct 42, and the inlet of the air inlet duct 42 is arranged on the bottom wall of the host 10 and is disposed directly below the IPM module 31. Therefore, after the air flow enters the air inlet duct 42, it directly flows vertically through the IPM module 31, realizing more comprehensive heat exchange and avoiding the situation of poor local heat dissipation.

[0059] In addition, in a preferred implementation manner, an auxiliary fan (not shown) is arranged in the air inlet duct 42, and the auxiliary fan blows air into the air inlet duct 42. More preferably, a second heat dissipation port communicating with the motor heat dissipation duct 41 is arranged at the bottom of the cup holder 22, the outlet end of the air inlet duct 42 is docked with the second heat dissipation port, and the auxiliary fan is arranged at the outlet end of the air inlet duct 42.

[0060] By adding an auxiliary fan in the air inlet duct 42, the auxiliary fan and the cooling fan 50 enhance the speed of the air flow, enabling the air flow to pass through the air inlet duct 42, the motor cooling duct 41, and the air outlet duct 43, quickly cooling the motor and the power supply board 30 and improving the cooling efficiency. By arranging the auxiliary fan at the outlet end of the air inlet duct 42, the probability of the auxiliary fan blowing sundries into the air inlet duct 42 can be reduced, avoiding duct blockage and ensuring smooth air flow circulation.

[0061] What is not described in this utility model can be realized by adopting or referring to the existing technologies.

[0062] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0063] The above are only the embodiments of this utility model and are not used to limit this utility model. For those skilled in the art, various modifications and changes can be made to this utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this utility model shall be included within the scope of the claims of this utility model.

Claims

1. A food processor with reliable heat dissipation, comprising a main body, and a cup assembly detachably mounted above the main body. The cup assembly includes a cup body, a cup base fixed to the bottom of the cup body, and a variable-frequency brushless motor fixed in the cup base. The rotating shaft of the variable-frequency brushless motor extends into the cup body and is connected with a crushing knife. A power supply board is arranged in the main body, and an IPM module electrically connected with the variable-frequency brushless motor is arranged on the power supply board. It is characterized in that, The variable-frequency brushless motor is a variable-frequency brushless motor without a fan. A motor heat dissipation air duct for dissipating heat from the variable-frequency brushless motor is provided in the cup base. An air inlet duct and an air outlet duct are provided in the main body. The air inlet duct, the motor heat dissipation air duct, and the air outlet duct are connected in sequence. The power supply board is arranged in the air inlet duct, and a heat dissipation fan for blowing air outwards is arranged in the air outlet duct.

2. The food processor with reliable heat dissipation according to claim 1, characterized in that A first heat dissipation opening communicating with the motor heat dissipation air duct is provided at the bottom of the cup base. The first heat dissipation opening is docked with the inlet of the air outlet duct, and the heat dissipation fan is arranged at the inlet end of the air outlet duct.

3. The food processor with reliable heat dissipation according to claim 2, characterized in that, The main body is provided with a supporting top wall for supporting the cup assembly. The supporting top wall is provided with a docking port to form the inlet of the air outlet duct, and the heat dissipation fan is fixed to the supporting top wall.

4. A food processor with reliable heat dissipation according to claim 2, characterized in that, A wind guiding cylinder is arranged in the main body. A docking port is provided on the supporting top wall of the main body. One end of the wind guiding cylinder is communicated with the docking port, and the other end is communicated with the outside to form the air outlet duct. The heat dissipation fan is fixed at one end of the wind guiding cylinder close to the docking port or the heat dissipation fan is clamped between the wind guiding cylinder and the supporting top wall.

5. A food processor with reliable heat dissipation according to claim 1, characterized in that, The outlet of the air outlet duct is opened on the bottom wall or the side wall of the main body, and the heat dissipation fan is arranged at the outlet end of the air outlet duct.

6. The food processor with reliable heat dissipation according to claim 1, wherein, An installation bracket for fixing the power supply board is further arranged in the main body. The installation bracket is provided with an installation groove for accommodating the power supply board, and the installation groove and the bottom wall of the main body enclose the air inlet duct.

7. The food processor with reliable heat dissipation according to claim 1, characterized in that, The power supply board is horizontally arranged in the air inlet duct. The IPM module protrudes on the upper side of the power supply board. The inlet of the air inlet duct is opened on the bottom wall of the main body and is horizontally offset from the power supply board.

8. A food processor with reliable heat dissipation according to claim 1, characterized in that, The power supply board is vertically arranged in the air inlet duct. The IPM module protrudes on one side of the power supply board. The inlet of the air inlet duct is opened on the bottom wall of the main body and is arranged directly below the IPM module.

9. The food processor with reliable heat dissipation according to claim 1, characterized in that, An auxiliary fan is arranged in the air inlet duct, and the auxiliary fan blows air into the air inlet duct.

10. The food processor with reliable heat dissipation according to claim 9, characterized in that, A second heat dissipation opening communicating with the motor heat dissipation air duct is provided at the bottom of the cup base. The outlet end of the air inlet duct is docked with the second heat dissipation opening, and the auxiliary fan is arranged at the outlet end of the air inlet duct.

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