CN215687240U - Food preparation machine with good heat dissipation - Google Patents

Abstract

The utility model discloses a food processor with good heat dissipation, which belongs to the technical field of food processors and comprises a host and a crushing cup, wherein a motor is arranged in the host, a crushing cutter driven by the motor is arranged in the crushing cup, the motor comprises a motor shaft, a fan is sleeved at the bottom end of the motor shaft, an isolation cover is arranged outside the motor, an air guide ring positioned at the bottom of the motor is arranged at the bottom of the isolation cover, an air guide hole communicated with the inside of the motor is arranged at the air guide ring, and the outer diameter of the fan is larger than the aperture of at least the lower part of the air guide hole. When the motor works to drive the fan to rotate for exhausting and radiating, the air flow flowing through the motor flows downwards to the fan and is then discharged along the tangential direction of the outer edge of the fan under the action of the fan. Because the outer diameter of the fan is larger than the inner diameter of the lower part of the air guide hole, the air exhausted by the fan can not flow back to the top of the fan, so that invalid airflow circulation caused by air outlet backflow is avoided, the heat dissipation airflow can be effectively exhausted out of the host under the action of the fan, and the heat dissipation effect inside the motor is favorably improved.

Description

Food preparation machine with good heat dissipation

Technical Field

The utility model relates to the technical field of food processing machines, in particular to a food processing machine with good heat dissipation.

Background

The existing food processor generally comprises a main machine and a crushing assembly, wherein the crushing assembly comprises a crushing cup, a crushing cutter and a motor, and when the machine body works, the motor drives the crushing cutter to rotate at a high speed to cut and crush materials in the crushing cup, so that the purpose of processing food is realized. Because the rotating speed of the motor is high, the internal temperature of the motor is high when the motor works, and the motor needs to be radiated. In the existing food processor, in order to realize heat dissipation of the motor, a fan is generally sleeved at the bottom end of a motor shaft, and the motor drives the fan to rotate while working to form heat dissipation airflow which flows through the interior of the motor and is then discharged out of a main machine. In the structure of the existing food processor, because the pressure of the air inlet side is smaller than that of the air outlet side when the fan rotates to form pressure difference, partial air enters the low-pressure side from the high-pressure side, namely flows back to the air inlet side from the air outlet side, and the partial air volume forms internal circulation, so that the heat can not be effectively dissipated, and the heat dissipation effect inside the motor is not improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model provides the food processor with good heat dissipation, which is beneficial to improving the heat dissipation effect in the motor.

In order to achieve the technical purpose, the food processing machine with good heat dissipation comprises a main machine and a crushing cup, wherein a motor is arranged in the main machine, a crushing cutter driven by the motor is arranged in the crushing cup, the motor comprises a vertically arranged motor shaft, a fan is sleeved at the bottom end of the motor shaft, an isolation cover is arranged outside the motor, an air guide ring positioned at the bottom of the motor is arranged at the bottom of the isolation cover, an air guide hole communicated with the inside of the motor is formed in the air guide ring, and the outer diameter of the fan is larger than the aperture of at least the lower part of the air guide hole.

Preferably, the top of the fan is provided with a circle of groove, and the bottom end of the air guide ring extends into the groove.

Preferably, a radial gap a is formed between the outer wall of the bottom end of the air guide ring and the inner wall of the groove on the side far away from the motor shaft, and a is more than or equal to 2.5mm and less than or equal to 8 mm; and/or the bottom surface of the air guide ring is lower than the top surface of the fan, a height difference b is arranged between the bottom surface of the air guide ring and the top surface of the fan, and b is more than or equal to 1mm and less than or equal to 5 mm.

Preferably, the fan includes a central portion and a plurality of blades circumferentially spaced along the central portion, the central portion is provided with an insertion hole matched with the motor shaft, the height of the inner side of the blade facing the central portion is smaller than the height of the outer side of the blade facing away from the central portion, and the groove is formed between each blade and the central portion.

Preferably, the fan includes the apron of locating each flabellum bottom and locates the baffle at each flabellum top, and the periphery of recess is located to the baffle, and the bottom of wind-guiding circle is located the inner periphery of baffle.

Preferably, the aperture of the air guide hole is reduced from top to bottom, the inner wall of the bottom end of the air guide hole expands outwards in an arc shape, the minimum aperture D1 is arranged at the vertex of the arc shape, the aperture of the bottom end of the air guide hole is D2, and D2-D1 are more than or equal to 0.5mm and less than or equal to 1.2 mm.

Preferably, 20mm < D1 < 30 mm; and/or the aperture of the top end of the air guide hole is D3, and D3 is more than or equal to 50mm and less than or equal to 63 mm.

Preferably, the bottom of the isolation cover is provided with a bottom plate, and the air guide ring is formed by partially extending downwards from the bottom plate.

Preferably, the lower end of the isolation cover is provided with a wiring groove with an opening at the bottom, and the bottom plate is provided with a wire pressing block matched with the wiring groove; and/or the isolation cover comprises an upper cover body and a lower cover body which are fixed together, and the bottom plate is fixed at the bottom of the lower cover body through a fastening piece.

Preferably, the host is internally provided with an exhaust cavity positioned at the bottom of the motor, the host is provided with an air inlet and an air outlet communicated with the exhaust cavity, and the fan is arranged in the exhaust cavity.

After the technical scheme is adopted, the utility model has the following advantages:

1. according to the food processing machine provided by the utility model, the bottom of the isolation cover is additionally provided with the air guide ring, the air guide hole is formed in the air guide ring, the outer diameter of the fan is larger than the aperture of at least the lower part of the air guide hole, when the motor works to drive the fan to rotate to exhaust air and dissipate heat, airflow flowing through the interior of the motor flows downwards to the fan, and then is discharged along the tangential direction of the outer edge of the fan under the action of the fan. Because the outer diameter of the fan is larger than the aperture of the lower part of the air guide hole, the air exhausted by the fan can not flow back to the top of the fan, so that ineffective airflow circulation caused by air outlet backflow is avoided, the heat dissipation airflow can be effectively exhausted out of the host under the action of the fan, and the heat dissipation effect inside the motor is favorably improved.

2. When the heat dissipation air flow flowing through the motor flows to the fan through the air guide ring, the bottom end of the air guide ring extends into the groove in the top of the fan, so that the effective air inlet amount of the top of the fan can be increased, the air exhaust speed of the heat dissipation air flow can be increased, and the heat dissipation effect can be further improved.

3. The radial clearance between the inner wall of motor shaft one side is kept away from to reasonable setting wind-guiding circle bottom outer wall and recess, avoids the wind-guiding circle to cause the interference to the rotation of fan when improving wind-guiding validity. If a is less than 2.5mm, the clearance between the air guide ring and the inner wall of the groove is small, and the air guide ring can interfere with the rotation of the fan. If a is more than 8mm, the gap between the air guide ring and the inner wall of the groove is larger, and air on the air outlet side of the fan easily flows back to the air inlet side, so that the heat dissipation effect is not improved.

The height difference between the bottom surface of the air guide ring and the top surface of the fan is reasonably arranged, and the air flow tightness of the air inlet side of the fan is guaranteed. If b is less than 1mm, the depth of the air guide ring extending into the groove is small, the air flow sealing effect of the air inlet side of the fan is low, and the heat dissipation effect is not guaranteed. If b is larger than 5mm, the depth of the air guide ring extending into the groove is larger, so that the local air pressure of the fan is lower, and the improvement of the air outlet efficiency is not facilitated.

4. The periphery of recess is located to the baffle, and the bottom of wind-guiding circle is located the inner periphery of baffle, forms through the baffle to blocking effect through fan exhaust wind, avoids being located the wind of fan air-out side because of the wind pressure great from the top backward flow of fan to the air inlet side of fan, further avoids the invalid air current circulation because of the air-out backward flow leads to.

5. The bottom inner wall of wind-guiding hole sets to the arc fillet shape, makes the entering fan that the radiating air current can be smooth and easy through this arc fillet, rationally sets up the aperture difference between wind-guiding hole minimum aperture department and the wind-guiding hole bottom, is favorable to the air intake of rationally improving the fan air inlet side. If D2-D1 is less than 0.5mm, the radius of the arc fillet is larger, local vortex is easily generated at the arc fillet, and the heat dissipation airflow is not favorably enabled to smoothly enter the fan. If D2-D1 is larger than 1.2mm, the radius of the arc fillet is smaller, and the flow guiding effect on the heat dissipation airflow is reduced.

6. The aperture at the minimum aperture of the air guide hole and the aperture at the top end of the air guide hole are reasonably arranged, so that the heat dissipation requirement is better met. If D1 is less than 20mm or D3 is less than 50mm, the air quantity of the air inlet side of the fan is small, the heat dissipation speed is low, and the heat dissipation requirement cannot be well met. If D1 > 30mm or D > 63mm, the aperture of the air guide hole is larger, and the outer diameter of the fan is correspondingly increased, so that the external dimension of the main machine is obviously increased.

7. The wind-guiding circle is formed by the local downwardly extending of bottom plate, and the formation structure of rationally setting up the wind-guiding circle is favorable to rationally reducing the shaping degree of difficulty and the installation degree of difficulty of wind-guiding circle, encapsulates the bottom of cage through the bottom plate, also is favorable to the noise of isolated motor during operation.

8. The bottom plate sets up with trough complex line ball piece, and the back is accomplished in the equipment, and the line ball piece card is in trough department, reduces the air mass flow of trough department greatly through the line ball piece, is favorable to improving the inside radiating effect of motor. The cage adopts the split type structure of upper shield body and lower shield body complex, is favorable to reducing the installation degree of difficulty when installing the cage in the motor outside.

Drawings

FIG. 1 is a schematic view of a food processor according to an embodiment;

FIG. 2 is a perspective view of a main body of a food processor according to an embodiment;

FIG. 3 is a front-rear cross-sectional view of a main body of a food processor according to an embodiment;

FIG. 4 is a diagram illustrating the structure of the motor, the shield and the fan of the food processor according to one embodiment;

FIG. 5 is a front-rear cross-sectional view of the motor, the cage, and the fan of a food processor according to an embodiment;

FIG. 6 is an enlarged view taken at A in FIG. 5;

FIG. 7 is a block diagram of a fan of a food processor according to an embodiment;

FIG. 8 is a cross-sectional view of a base plate of the food processor of the embodiment taken along a vertical direction;

FIG. 9 is an enlarged view at B of FIG. 8;

FIG. 10 is a block diagram of an upper housing of a cage of a food processor according to an embodiment;

FIG. 11 is a block diagram of a lower housing of a cage of a food processor according to an embodiment;

FIG. 12 is a front-rear cross-sectional view of the lower housing of the cage of the food processor according to the embodiment;

fig. 13 is an enlarged view at C in fig. 12.

In the figure, 100-host computer, 110-machine shell, 120-base, 130-top cover, 140-exhaust cavity, 150-air inlet, 160-air outlet, 170-operation panel, 200-grinding cup, 210-grinding knife, 220-cup body, 230-cup holder, 240-cup cover, 300-motor, 310-motor shaft, 320-coil, 400-fan, 410-groove, 420-baffle, 430-center part, 431-jack, 440-fan blade, 450-cover plate, 500-isolation cover, 510-wiring groove, 520-upper cover body, 521-convex rib, 530-lower cover body, 540-upper inlet, 550-lower inlet, 560-air inlet channel, 570-positioning convex edge, 610-bottom plate, 611-line pressing block, 620-wind guide ring, 630-wind guide hole, 640-arc fillet, 650-inclined plane, 710-upper transmission joint, 720-lower transmission joint, 810-first sealing ring and 820-second sealing ring.

Detailed Description

The utility model is further described with reference to the following figures and specific examples. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used merely to indicate an orientation or positional relationship relative to one another as illustrated in the drawings, merely to facilitate describing and simplifying the utility model, and are not intended to indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore are not to be considered limiting of the utility model.

Example one

As shown in fig. 1 to 13, a food processor with good heat dissipation according to an embodiment of the present invention includes a main machine 100 and a grinding cup 200, wherein a motor 300 is disposed in the main machine 100, a grinding knife 210 driven by the motor 300 is disposed in the grinding cup 200, the motor 300 includes a vertical motor shaft 310, a fan 400 is sleeved at a bottom end of the motor shaft 310, and an isolation cover 500 is disposed outside the motor 300. The bottom of the isolation cover 500 is provided with an air guide ring 620 positioned at the bottom of the motor 300, an air guide hole 630 communicated with the inside of the motor 300 is arranged at the air guide ring 620, and the outer diameter of the fan 400 is larger than the aperture of at least the lower part of the air guide hole 630.

When the motor works to drive the fan to rotate for exhausting and radiating, the air flow flowing through the motor flows downwards to the fan and is then discharged along the tangential direction of the outer edge of the fan under the action of the fan. Because the outer diameter of the fan is larger than the aperture of the lower part of the air guide hole, the air exhausted by the fan can not flow back to the top of the fan, so that ineffective airflow circulation caused by air outlet backflow is avoided, the heat dissipation airflow can be effectively exhausted out of the host under the action of the fan, and the heat dissipation effect inside the motor is favorably improved.

Referring to fig. 8, the bottom end of the isolation cover 500 is provided with an opening, a bottom plate 610 for covering the opening is provided at the bottom of the isolation cover 500, the wind guide ring 620 is formed by partially extending the bottom plate 610 downward, and the bottom plate 610 is fixed at the bottom of the isolation cover 500 by screws.

Referring to fig. 7, a ring of grooves 410 is formed at the top of the fan 400, and the bottom end of the wind-guiding ring 620 extends into the grooves 410. Specifically, the fan 400 includes a central portion 430 and a plurality of blades 440 spaced apart from each other along a circumferential direction of the central portion 430, the central portion 430 is provided with an insertion hole 431 engaged with the motor shaft 310, and the blades 440 are thin and have a plane direction corresponding to a radial direction of the fan 400. The inner height of the fan 440 facing the central portion 430 is less than the outer height of the fan facing away from the central portion 430, so that a ring of grooves 410 is formed between the plurality of fan 440 and the central portion 430. The fan 400 further includes a cover plate 450 disposed at the bottom of each of the fan blades 440 and a baffle 420 disposed at the top of each of the fan blades, the baffle 420 is in an annular thin plate shape and disposed at the outer periphery of the groove 410, the fan blades 440 are sandwiched between the cover plate 450 and the baffle 420, and the bottom end of the air guiding ring 620 is located at the inner periphery of the baffle 420. In this embodiment, jack 431 and motor shaft 310 adopt non-circular shaft hole cooperation structure, and is concrete, and jack 431 is the quad slit, realizes the suit cooperation through square shaft hole cooperation structure between the bottom of jack 431 and motor shaft 310. In order to secure the fixing strength between the motor shaft 310 and the fan 400, the fan 400 is further fixed to the bottom end of the motor shaft 310 by screws.

In order to improve the air guiding effectiveness and avoid the interference of the air guiding ring 620 on the rotation of the fan 400, a radial gap between the bottom end of the air guiding ring 620 and the inner wall of the groove 410 needs to be reasonably set. Referring to fig. 6, a radial gap a is formed between the outer wall of the bottom end of the wind guide ring 620 and the inner wall of the groove 410 on the side far away from the motor shaft 310, wherein a is greater than or equal to 2.5mm and less than or equal to 8 mm. In this embodiment, the radial gap a is preferably set to 4 mm.

In order to ensure the air flow tightness of the air inlet side of the fan 400, the height difference between the bottom surface of the air guiding ring 620 and the top surface of the fan 400 needs to be set reasonably. Referring to FIG. 6, the bottom surface of the wind guiding ring 620 is lower than the top surface of the fan 400, the height difference between the two is b, and b is greater than or equal to 1mm and less than or equal to 5 mm. In the present embodiment, the height difference b is preferably set to 3 mm.

Referring to fig. 8 and 9, the diameter of the air guide hole 630 is reduced from top to bottom, and is formed into a horn shape with a thick top and a thin bottom. The inner wall of the bottom end of the air guide hole 630 is expanded outwards in an arc shape to form an arc-shaped fillet 640 arched towards the axial lead of the air guide ring 620, the air guide hole 630 is provided with a minimum aperture D1 at the vertex of the arc-shaped fillet 640, the aperture of the bottom end of the air guide hole 630 is D2, the aperture of the top end of the air guide hole 630 is D3, the aperture of D1 is not less than 20mm and not more than 30mm, the aperture of D2-D1 is not less than 0.5mm and not more than 1.2mm, and the aperture of D3 is not less than 50mm and not more than 63 mm. In this embodiment, the minimum aperture D1 of the wind guide hole 630 is preferably set to be 27mm, D2-D1 is preferably set to be 0.8mm, that is, the aperture D2 at the bottom end of the wind guide hole 630 is preferably set to be 27.8mm, the aperture D3 at the top end of the wind guide hole 630 is preferably set to be 58mm, and the outer diameter of the fan 400 is slightly smaller than the aperture D3 at the top end of the wind guide hole 630.

With reference to fig. 4 and 11, in order to facilitate routing, a routing groove 510 with an opening at the bottom is disposed at the lower end of the isolation cover 500, and a line pressing block 611 matched with the routing groove 510 is disposed on the bottom plate 610. After the assembly is completed, the wire pressing block 611 is clamped in the wire distributing groove 510, the wire distributing groove 510 is sealed by the wire pressing block 611, air outflow at the position of the wire distributing groove 510 is reduced, and the improvement of the heat dissipation effect inside the motor 300 is facilitated. In this embodiment, the isolation hood 500 includes an upper hood 520 and a lower hood 530 fixed together, the wire trough 510 is disposed at the bottom end of the lower hood 530, and the bottom plate 610 is fixed to the bottom of the lower hood 530 by screws.

Referring to fig. 2 and 3, in the embodiment, the main body 100 includes a housing 110, a base 120 fixed at the bottom of the housing 110, a top cover 130 fixed at the top of the housing 110, and an operation panel 170 disposed at the front side of the housing 110, a plurality of air inlet holes 150 distributed at intervals are disposed at the left and right sides of the base 120, an air inlet communicated with the inside of the motor 300 is disposed on the isolation cover 500, an air exhaust cavity 140 located at the bottom of the isolation cover 500 is disposed in the main body 100, a plurality of air outlet holes 160 uniformly distributed and communicated with the air exhaust cavity 140 are disposed at the rear side of the housing 110, and the fan 400 is disposed in the air exhaust cavity 140. When the motor 300 operates to drive the fan 400 to rotate, the heat dissipation air flow entering from the air inlet 150 and flowing into the motor 300 through the air inlet is formed, and then the heat dissipation air flow is discharged from the main unit 100 through the air discharge cavity 140 and the air outlet 160, so that the temperature inside the motor 300 is reduced through the heat dissipation air flow.

In order to improve the heat dissipation effect inside the motor 300, the upper portion of the isolation cover 500 is provided with an upper air inlet 540, and the lower portion is provided with a lower air inlet 550. When the motor 300 drives the fan 400 to rotate to form a heat dissipation airflow, air with lower temperature flows into the upper air inlet 540 and the lower air inlet 550, the air entering from the upper air inlet 540 and the upper part in the motor 300 are subjected to obvious heat exchange to effectively reduce the temperature of the upper part in the motor 300, and the air entering from the lower air inlet 550 and the lower part in the motor 300 are subjected to obvious heat exchange to effectively reduce the temperature of the lower part in the motor 300. The air inlet of the heat dissipation air flow is dispersed through the upper air inlet and the lower air inlet, so that the heat dissipation air flow and the upper part and the lower part in the motor 300 can generate effective heat exchange, and the improvement of the heat dissipation effect in the motor 300 is facilitated.

In order to reasonably distribute the air intake amount at the upper air inlet 540 and the lower air inlet 550, the area ratio between the upper air inlet and the lower air inlet needs to be set reasonably. In this embodiment, the area of the lower air inlet 550 is S1, the area of the upper air inlet 540 is S2, 2.5 ≤ S2/S1 ≤ 5, and 150mm²≤S1≤180mm². Specifically, the area S1 of the lower intake vent 550 is preferably set to 160mm²S2/S1 is preferably set to 3.625, i.e., the area S2 of the upper inlet 540 is preferably set to about 580mm²。

Referring to fig. 10, 11 and 12, in the present embodiment, the upper air inlet 540 is disposed on the upper housing 520, and the lower air inlet 550 is disposed on the lower housing 530. The lower part of the upper cover body 520 covers the periphery of the lower cover body 530, an air inlet channel 560 is formed between the upper cover body 520 and the lower cover body 530, and both the upper air inlet 540 and the lower air inlet 550 are communicated with the air inlet channel 560. The outside cover of motor 300 is equipped with the first sealing washer 810 that is located between the upper shield body 520 and the lower shield body 530, and the top in the upper shield body 520 is equipped with protruding muscle 521 with first sealing washer 810 complex, and protruding muscle 521 is equipped with a plurality of sections along upper shield body 520 circumference interval, and last air inlet 540 is located between two sections adjacent protruding muscle 521, and first sealing washer 810 is equipped with the mouth of dodging that is used for dodging last air inlet 540 in the position department that corresponds with last air inlet 540. The top of the first sealing ring 810 abuts against the rib 521, and the bottom of the first sealing ring 810 abuts against the top of the lower cover 530.

The coil 320 is disposed in the motor 300, and the coil 320 is a main heating element of the motor 300, and in order to improve the heat dissipation effect inside the motor 300, it is preferable that the heat dissipation air flow mainly flows through the coil 320, so that the upper air inlet 540 is disposed corresponding to the upper portion of the coil 320, and the lower air inlet 550 is disposed corresponding to the lower portion of the coil 320. In this embodiment, the upper intake opening 540 is substantially located at the vertical center of the upper portion of the coil 320, and the lower intake opening 550 is substantially located at the vertical center of the lower portion of the coil 320.

The two coils 320 are disposed side by side in the front-rear direction and spaced apart from each other, and in order to enable the heat dissipation airflow entering from the upper air inlet 540 and the heat dissipation airflow entering from the lower air inlet 550 to better flow through the coils 320, the upper air inlet 540 is preferably disposed two and respectively disposed on the front side portion and the rear side portion of the upper cover 520, and the lower air inlet 550 is also preferably disposed two and respectively disposed on the front side portion and the rear side portion of the lower cover 530.

Referring to fig. 13, in order to guide the air introduced into the motor 300 from the lower intake vent 550 to the coil 320, the top and bottom walls of the lower intake vent 550 are formed as inclined surfaces 650 inclined downward from one side away from the center of the motor 300 to the other side close to the center of the motor 300, and the intake air is guided by the inclined surfaces 650. In this embodiment, the top wall and the bottom wall of the lower air inlet 550 on the front side of the lower cover 530 are inclined planes with a higher front and a lower rear, and the top wall and the bottom wall of the lower air inlet 550 on the rear side of the lower cover 530 are inclined planes with a lower front and a higher rear.

In order to better meet the heat dissipation requirement, the inclination angle of the inclined plane 650 needs to be set reasonably. The included angle between the inclined plane 650 and the horizontal direction is alpha, and alpha is more than or equal to 10 degrees and less than or equal to 20 degrees. In the present embodiment, the angle α is preferably set to 15 °.

In order to improve the structural stability of the isolation cover 500, the circumferential outer wall of the isolation cover 500 is provided with a positioning convex edge 570, specifically, the positioning convex edge 570 is arranged on the circumferential outer wall of the upper cover body 520, the positioning convex edge 570 abuts against the positioning step inside the main unit 100, and the isolation cover 500 is positioned and supported by the matching of the positioning convex edge 570 and the positioning step. To reduce the intensity of vibration transmission between the isolation cover 500 and the main body 100, the positioning flange 570 is externally coated with a second sealing ring 820.

Referring to fig. 1, in the present embodiment, the grinding cup 200 includes a cup body 220, a cup holder 230 disposed at a bottom end of the cup body 220, and a cup cover 240 for covering the cup body 220, and the grinding blade 210 is rotatably disposed on the cup holder 230. A transmission matching structure is arranged between the crushing cutter 210 and the motor shaft 310, the transmission matching structure comprises an upper transmission joint 710 and a lower transmission joint 720, the upper transmission joint 710 is sleeved at the bottom end of the cutter shaft of the crushing cutter 210, the lower transmission joint 720 is sleeved at the top end of the motor shaft 310, and the upper transmission joint 710 and the lower transmission joint 720 are detachably matched.

When the machine body works, the motor shaft 310 of the motor 300 drives the crushing cutter 210 to rotate through the transmission matching structure, so as to cut and crush the materials in the crushing cup 200, meanwhile, the motor shaft 310 drives the fan 400 to rotate to form an air suction flow, the air suction flow flows into the inside of the main machine 100 from the air inlet hole 150, then flows into the inside of the motor 300 through the air inlet channel 560, the upper air inlet 540 and the lower air inlet 550, and then is discharged out of the main machine 100 through the air guide hole 630, the fan 400, the air exhaust cavity 140 and the air outlet hole, and the air suction flow carries out heat exchange when flowing through the inside of the motor 100, so as to reduce the temperature inside the motor 100 and realize the heat radiation purpose of the motor.

It is understood that the outer diameter of the fan 400 may be larger than the diameter of the top end of the wind guide hole 630, and in this case, the outer diameter of the fan 400 is larger than the diameter of the whole wind guide hole 630.

It will be appreciated that the grinding cup 200 may take on other suitable configurations and is not limited to the description and drawings.

It is understood that the improved structure of the present embodiment is also applicable to a machine type in which the pulverizing cup 200 is fixed to the main body 100.

It is understood that the baffle 420 may be integrally formed with the fan 400, or may be separately formed and then fixed to the top of the fan 400.

It is understood that the cover plate 450 may be integrally formed with the fan 400, or may be separately formed and then fixed to the bottom of the fan 400.

It is understood that the radial clearance a may also be set to other reasonable clearance values of 2.5mm, 3mm, 3.5mm, 3.8mm, 4.1mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, etc.

It is understood that the height difference b can be set to 1mm, 1.5mm, 2mm, 2.5mm, 2.8mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm, and other reasonable differences.

It is understood that the minimum aperture D1 of the wind guide holes 630 may be set to other reasonable aperture values such as 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 26.5mm, 27.5mm, 28mm, 29mm, 30mm, etc.

It is understood that D2-D1 may be set to 0.5mm, 0.6mm, 0.7mm, 0.9mm, 1mm, 1.1mm, 1.2mm, and other reasonable differences.

It is understood that the aperture D3 at the top end of the wind guide hole 630 may be set to other reasonable aperture values such as 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 59mm, 60mm, 61mm, 62mm, 63mm, etc.

It can be understood that the socket 431 and the bottom end of the motor shaft 310 can be sleeved together by a triangular shaft hole matching structure, a pentagonal shaft hole matching structure, a spline-shaped shaft hole matching structure, or other reasonable non-circular shaft hole matching structures.

It will be appreciated that the screws used to secure the fan 400 may be eliminated, provided that the non-circular shaft hole mating arrangement meets the mounting requirements of the fan 400.

It will be appreciated that the non-circular hole fitting structure between the insertion hole 431 and the motor shaft 310 is not necessarily required on the premise that the strength of the fan 400 screwed to the bottom end of the motor shaft 310 satisfies the installation requirement of the fan 400.

It is understood that the area S1 of the lower intake vent 550 may be set to 150mm²、155mm²、158mm²、162mm²、165mm²、170mm²、175mm²、180mm²And the like, as appropriate.

It is understood that the area ratio S2/S1 between the upper air inlet 540 and the lower air inlet 550 can be set to other reasonable ratios such as 2.5, 2.8, 3, 3.2, 3.4, 3.7, 3.8, 4, 4.3, 4.5, 4.8, 5, etc.

It is understood that the specific number of the upper air inlets 540 is not limited to the above description and shown in the drawings, and may be set to three, four, or other reasonable numbers to meet the heat dissipation requirement.

It can be understood that the specific number of the lower air inlets 550 is not limited to the above description and shown in the drawings, and may be set to be three, four, or other reasonable numbers to meet the heat dissipation requirement.

It is understood that, if the diversion requirement is satisfied, only the top wall or the bottom wall of the lower air inlet 550 may be provided as the inclined surface 650.

It is understood that the included angle α may also be set to other reasonable angle values of 10 °, 11 °, 12 °, 13 °, 14 °, 14.5 °, 15.2 °, 16 °, 17 °, 18 °, 19 °, 20 °, and so on.

Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.

Claims (10)

1. The food processing machine is characterized in that an air guide ring positioned at the bottom of the motor is arranged at the bottom of the isolation cover, an air guide hole communicated with the inside of the motor is formed in the air guide ring, and the outer diameter of the fan is larger than the aperture of at least the lower part of the air guide hole.

2. The food processor of claim 1, wherein the fan includes a ring of grooves in a top portion thereof, and wherein the bottom ends of the wind-guiding rings extend into the grooves.

3. The food processor of claim 2, wherein a radial gap a is provided between the outer wall of the bottom end of the air guide ring and the inner wall of the groove on the side away from the motor shaft, and a is greater than or equal to 2.5mm and less than or equal to 8 mm; and/or the bottom surface of the air guide ring is lower than the top surface of the fan, a height difference b is arranged between the bottom surface of the air guide ring and the top surface of the fan, and b is more than or equal to 1mm and less than or equal to 5 mm.

4. The food processor of claim 2, wherein the fan includes a central portion and a plurality of blades spaced circumferentially about the central portion, the central portion having an insertion hole for engaging the motor shaft, the blades having an inner side facing the central portion that is less than an outer side facing away from the central portion, and a recess disposed between each blade and the central portion.

5. The food processor of claim 4, wherein the fan includes a cover plate at the bottom of each fan blade and a baffle plate at the top of each fan blade, the baffle plate is disposed at the outer periphery of the groove, and the bottom end of the wind-guiding ring is disposed at the inner periphery of the baffle plate.

6. The food processor of claim 1, wherein the air-guiding hole has a decreasing diameter from top to bottom, the inner wall of the bottom end of the air-guiding hole is expanded outward in an arc shape and has a minimum diameter D1 at the vertex of the arc shape, the diameter of the bottom end of the air-guiding hole is D2, and the diameter of the bottom end of the air-guiding hole is D2-D1 is D2 mm or more and 1.2mm or less.

7. A food processor as claimed in claim 6, characterized in that 20 mm. ltoreq. D1. ltoreq.30 mm; and/or the aperture of the top end of the air guide hole is D3, and D3 is more than or equal to 50mm and less than or equal to 63 mm.

8. The food processor of claim 1, wherein the bottom of the cage defines a floor, and the deflector is formed by a portion of the floor extending downwardly.

9. The food processor of claim 8, wherein the lower end of the shield has a trough with an open bottom, and the bottom plate has a pressing block engaged with the trough; and/or the isolation cover comprises an upper cover body and a lower cover body which are fixed together, and the bottom plate is fixed at the bottom of the lower cover body through a fastening piece.

10. The food processor as defined in claim 1, wherein the main body is provided with an exhaust chamber at a bottom of the motor, the main body is provided with an air inlet hole and an air outlet hole communicated with the exhaust chamber, and the fan is provided in the exhaust chamber.

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