CN110754931B

CN110754931B - Cooking utensil

Info

Publication number: CN110754931B
Application number: CN201810845684.3A
Authority: CN
Inventors: 朱旭光; 王本新
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2021-09-21
Anticipated expiration: 2038-07-27
Also published as: CN110754931A

Abstract

The application provides a cooking utensil and radiator unit thereof, this radiator unit includes fan and fan support, fan support is equipped with a frame mouth, and this frame mouth includes a roof that is located its top, the roof forms first through-hole and the second through-hole with this frame mouth intercommunication respectively in its inside and outside both sides. The top wall of the air guide support blocks a part of air flow in the middle, the air flow is intensively divided into two paths, the power panel and the coil panel assembly can be respectively and intensively cooled, and the cooling effect is improved.

Description

Cooking utensil

Technical Field

The present application relates to a cooking appliance.

Background

Common cooking utensil includes pot cover and the pot body, the pot body is including interior pot, heat preservation cover and shell, and interior pot holds in this heat preservation cover, and this heat preservation cover is located this shell, form the culinary art chamber between interior pot and the pot cover, be equipped with heating element between interior pot bottom and the heat preservation cover bottom to the heating of interior pot. More and more cooking appliances employ a solenoid coil assembly as a heating element. The electromagnetic heating has many advantages, for example, the coil itself can not generate heat basically, the heating part adopts the annular cable structure, the cable itself can not generate heat, and can bear the high temperature of more than 500 ℃, and the service life can be as long as 10 years. The average preheating time of electromagnetic heating is shortened by more than 60% compared with a resistance coil heating mode, meanwhile, the thermal efficiency is as high as more than 90%, and under the same condition, the production efficiency is greatly improved by saving electricity by 30% -80% compared with the resistance coil heating mode. For the above reasons, the solenoid disc assembly is increasingly used in various cooking appliances. Because the heat of the bottom of the inner pot is larger during working, a fan structure is usually arranged in the cooking utensil and used for radiating the power panel and the coil panel assembly, and the heat damage of electronic elements and coils on the power panel is avoided. However, the air flow blown by the existing fan structure intensively flows upwards, and poor heat dissipation can occur on the side of the coil panel assembly far away from the fan.

Accordingly, there is a need for improvements to existing cooking appliances.

Disclosure of Invention

The application provides a cooking utensil that can well dispel the heat.

Specifically, the method is realized through the following technical scheme: a heat radiation assembly of a cooking utensil comprises a fan and a fan support, wherein the fan support is provided with a frame opening, the frame opening comprises a top wall positioned at the top of the frame opening, and a first through hole and a second through hole communicated with the frame opening are respectively formed in the inner side and the outer side of the top wall. The top wall of the air guide support blocks a part of air flow in the middle, the air flow is intensively divided into two paths, and the power panel and the coil panel assembly can be respectively and intensively cooled.

According to one embodiment of the present application, the top wall area is greater than 1/8 of the bezel area. More air flow in the middle can be shielded, so that the air flow flows to two sides more intensively.

According to one embodiment of the present application, the top wall area is 1/8-9/20 of the bezel area.

According to an embodiment of the present application, the first through hole has a length of 56 to 62mm and a width of 12 to 18 mm.

According to an embodiment of the application, the frame opening further comprises a first side wall, a third through hole is formed in the first side wall, the third through hole is communicated with the first through hole to form a first air inlet together, and the second through hole forms a second air inlet. The air guide support is provided with a lateral third through hole, so that the lateral flowing capacity of air flow is improved, and the heat dissipation of the coil disc assembly is better.

According to an embodiment of the present application, the fan bracket is further provided with a guide plate extending obliquely inward and upward from the bottom edge of the first sidewall. The guide plate is capable of guiding the airflow toward the coil disc assembly.

According to one embodiment of the application, the length of the guide plate is 43 to 49 mm.

According to an embodiment of the present application, the frame opening further includes a second side wall opposite to the first side wall, and third and fourth side walls connecting the first side wall and the second side wall, wherein the third and fourth side walls continue to extend inward and are connected to two side edges of the guide plate.

According to an embodiment of the present application, the guide plate, the third side wall and the fourth side wall form a first air guiding channel, and the first air guiding channel takes the first air inlet as an inlet; the second side wall, the third side wall and the fourth side wall further extend upwards to form a second air guide channel, and the second air guide channel takes the second air inlet as an inlet.

According to an embodiment of the present application, the bezel further comprises a plurality of side walls, and the top wall and tops of the plurality of side walls are all interconnected. The overall strength of the fan bracket can be improved.

According to one embodiment of the application, the bottom surface of the top wall is provided with a plurality of supporting members. The supports act as spacers to create a gap between the top wall and the fan for the flow of gas.

According to one embodiment of the application, the height of the support is greater than 0.9mm and less than the depth of the bezel. Enabling the bezel to position the fan.

According to one embodiment of the application, a clamping arm for clamping the fan is arranged on the fan support.

According to an embodiment of the application, the fan includes frame and is located the fan main part in this frame, a framework of frame is equipped with the side direction opening, the opening with the third through hole intercommunication. The fan is provided with an opening corresponding to the third through hole, so that the lateral flowing capacity of airflow can be improved, and the heat dissipation of the coil disc assembly can be better realized.

According to one embodiment of the present application, the opening is formed at an upper edge of the frame and penetrates upward through the frame.

According to an embodiment of the application, the size of the third through hole is larger than or equal to the opening size.

This application still provides another technical scheme, a cooking utensil, and it includes interior pot, heat preservation cover, coil disc subassembly and power strip, interior pot is located in the heat preservation cover, the coil disc subassembly is located this interior pot bottom and should keep warm between the cover bottom, and this cooking utensil still includes aforementioned radiator unit, and this power strip is located the side of heat preservation cover, the fan sets up the below at this power strip, fan support is located between this fan and the power strip.

According to an embodiment of the application, be equipped with the clearance between heat preservation cover and the power strip, the roof is located this clearance below.

According to an embodiment of the application, the heat preservation cover includes lateral wall and the supporting platform who is located the bottom, and this supporting platform has the breach, aforementioned breach with first through-hole corresponds, and the cooling air current passes this first through-hole and this breach and gets into this heat preservation cover in to the coil disc subassembly dispels the heat.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a sectional view of a cooking appliance according to an embodiment of the present application.

Fig. 2 is a partially exploded perspective view of the cooking appliance shown in fig. 1.

Fig. 3 is a perspective view of a fan of the cooking appliance shown in fig. 1.

Fig. 4 is a perspective view of a fan bracket of the cooking appliance shown in fig. 1.

Fig. 5 is a perspective view of a heat retaining cover of the cooking appliance shown in fig. 1.

Fig. 6 is a cross-sectional view of a pot of the cooking appliance shown in fig. 1.

Description of reference numerals:

the cooker comprises a heat preservation cover 1, a supporting platform 11, a window 12, a notch 14, an air guide hole 15, a sinking platform 16, a boss 17, a cooker body 2, a base 3, a bottom wall 30, an air inlet hole 31, an air outlet hole 32, an inner pot 4, a coil disc assembly 5, a supporting ring 51, a coil disc 52, a winding frame 53, a power supply board 6, a matching hole 61, a positioning lug 62, a fan 7, an outer frame 70, a fan main body 72, an opening 73, a screw hole 74, a fan bracket 8, a frame opening 80, a side wall 81, a first side wall 811, a second side wall 812, third and fourth side walls 813, a positioning block 817, a top wall 82, a first through hole 821, a second through hole 822, a supporting piece 824, a third through hole 815, a first air guide channel 826, a second air guide channel 827, a screw hole 828, a guide plate 84, an edge 840 and a buckle arm 86.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of devices, systems, apparatuses, and methods consistent with certain aspects of the present application, as detailed in the appended claims.

Referring to fig. 1 and 2, the cooking device of the present application includes a pot cover and a pot body, the pot body includes a heat preservation cover 1, a pot body 2, a base 3 and an inner pot 4, the inner pot 4 is accommodated in the heat preservation cover 1, the pot body 2 and the base 3 jointly form a housing, and the heat preservation cover 1 is located in the housing. Cooking utensil still is equipped with and is located this interior 4 bottoms of pots and this heat preservation cover 1 bottom between coil panel subassembly 5 for heat this interior pot 4. Interior pot 4 with form the culinary art chamber between the pot cover, this cooking utensil is electric pressure cooker in this embodiment, the pot cover with be equipped with the pot tooth structure of mutual rotation buckle between the heat preservation cover 1, this culinary art chamber of during operation forms sealed chamber in order to carry out pressure cooking.

The cooking appliance further comprises a power panel 6, a fan 7 and a fan support 8. A plurality of electrical components are mounted on the power panel 6. The power panel 6 is vertically fixed on the inner side of the inner side wall of the cooker body 2 and is positioned between the shell and the side wall of the heat preservation cover 1. The fan 7 is located below the power panel 6, and the fan bracket 8 is located between the fan 7 and the power panel 6 and fixed on the bottom side of the power panel 6 for guiding the airflow blown by the fan 7.

The fan 7 is horizontally arranged on the inner side of the base 3, an air suction surface is arranged facing the bottom wall 30 of the base 3, an air inlet hole 31 is formed in the bottom wall 30 corresponding to the fan 7, external cold air enters from the air inlet hole 31 under the suction effect of the fan 7, then airflow is divided into two paths under the guiding of the fan support 8 and flows towards the coil panel assembly 5 and the power panel 6 respectively, and finally the two paths are discharged from an air outlet hole 32 formed in the other side of the bottom wall 30 of the base 3, and the fan support 8 can centralize cooling airflow to flow towards the coil panel assembly 5 and the power panel 6, so that the heat dissipation efficiency is improved. In the present embodiment, the fan 7 is located right below the power board 6 to shorten the airflow path and further cool the power board 6.

As shown in fig. 3 and 4, the fan bracket 8 has a frame opening 80, and the frame opening 80 is substantially rectangular and includes four side walls 81 and a top wall 82. The top wall 82 and the tops of the four side walls 81 are connected with each other, so that the overall strength of the fan bracket can be improved.

The sidewall 81 of the bezel 80 includes a first sidewall 811 and a second sidewall 812 opposite to each other, and a third sidewall 813 and a fourth sidewall 813 connecting the first sidewall 811 and the second sidewall 812. Wherein the first side wall 811 is located inside, close to the coil disk assembly 5; the second side wall 812 is located at the outside, and is disposed near the power supply board 6. The top wall 82 has a first through hole 821 and a second through hole 822 formed on the inner and outer sides thereof, respectively, and the first sidewall 811 has a third through hole 815 formed corresponding to the first through hole 821. The third through hole 815 is communicated with the first through hole 821 to form a first air inlet together. The second through hole 822 forms a second air intake opening. The first through hole 822 has a length of 56 to 62mm and a width of 12 to 18 mm. The area of the top wall 82 is greater than 1/8 of the area of the first through hole 821 to block more air flow in the middle, so that the air flow flows more intensively to both sides.

The area of the top wall 82 is greater than 1/8, preferably 1/8 to 9/20, of the area of the bezel 80. An excessively large ratio means that the area of the top wall 82 occupies a relatively high ratio, which results in a small area of the through hole and is not favorable for rapid heat dissipation; and the ratio is too small, so that the air flow cannot be effectively and intensively radiated to two sides, and the centralized flow dividing effect of the top wall cannot be exerted. The above numerical values are obtained through careful study by the inventors, and the heat dissipation effect is high.

The first side wall 811, the third and fourth side walls 813 and the inner edge of the top wall 82 form the first air inlet; the second side wall 812, the third and fourth side walls 813 and the outer edge of the top wall 82 are formed around the second air inlet. The air flow sucked by the fan 7 enters the inside of the cooking utensil from the first and second air inlets.

The fan bracket 8 is further provided with a guide plate 84, and the guide plate 84 extends from the bottom edge of the first sidewall 811 to the inside of the cooking appliance and slants upward. The guide plate 84 is located beside the first through hole 821, and has a length of 43 to 49 mm. The third and fourth side walls 813 extend inward and are connected to both side edges 840 of the guide plate 84. Referring to fig. 6, the guide plate 84 and the third and fourth side walls 813 form a first air guiding passage 826, and the first air guiding passage 826 takes the first air inlet as an inlet. The guide plates 84 are disposed diagonally inward and upward and are capable of guiding the air flow upward and inward to dissipate heat from the coil disk assembly 5. The second side wall 812, the third side wall 813 and the fourth side wall 813 further extend upwards to form a second air guiding channel 827, and the second air guiding channel 827 takes the second air inlet as an inlet to guide air flow to extend upwards so as to provide heat dissipation for the power panel 6 located above the second air guiding channel 827.

Referring to fig. 2, the fan bracket 8 is fixed to the power board 6 by screws, the bottom of the power board 6 is provided with a matching hole 61, the top wall 82 of the fan bracket 8 is provided with a screw hole 828, and the screws are fixed to the matching holes 61 of the power board 6 through the screw holes 828 to fix the fan bracket 8 to the power board 6. The bottom of the power board 6 is further provided with two positioning bumps 62, the two positioning bumps 62 respectively abut against or are attached to the outer side surfaces of the third and fourth side walls 813 of the fan support 8, the third and fourth side walls 813 of the fan support 8 are further provided with positioning blocks 817 protruding outwards, and the positioning blocks 817 are located on the outer sides of the positioning bumps 62. During assembly, the fan bracket 8 is placed between the two positioning bumps 62, the positioning blocks 817 are inwardly abutted against the positioning bumps 62 to realize pre-positioning, and then the fan bracket is fixed by screws.

Referring to fig. 2 and 4, the fan 7 includes an outer frame 70 and a fan main body 72 disposed in the outer frame 70. The outer frame 70 has an upper opening, a lower air suction surface and an upper air outlet surface, and the frame 71 of the outer frame 70 located at the inner side is provided with an opening 73. The opening 73 is formed at the upper edge of the frame 71, has a U-shaped notch, and extends upward through the frame 71.

The fan 7 is entirely received in the frame opening 80 of the fan bracket 8, the side wall 81 is located outside the outer frame 70 of the fan 7, a screw hole 74 is provided at a corner of the outer frame 70 of the fan 7, and the fan 7 is fixed to the ceiling wall 82 of the fan bracket 8 by a screw passing through the screw hole 74. The fan bracket 8 is further provided with a locking arm 86 for locking the lower surface of the outer frame 70 of the fan 7. After the fan 7 is fixed to the fan bracket 8, the opening 73 corresponds to the third through hole 815 of the first sidewall 811. The size of the third through hole 815 is greater than or equal to the size of the opening 73.

The bottom surface of the top wall 82 is also provided with a plurality of supporting members 824. The supporting members 824 are disposed at four corners of the frame opening 80, and serve as a space, and a gap for air flow is formed between the top wall 82 and the top surface of the fan 7, so that the air flow blown by the fan 7 is fully utilized. According to one embodiment of the present application, the height of the support member is greater than 0.9mm and less than the depth of the bezel 80, such that the bezel 80 is still able to position the fan 7.

The side air flow blown by the fan 7 can enter the first air guiding channel 826 through the opening 73 and the third through hole 815 (which can also be referred to as a second air inlet), and then continuously blow upward toward the coil panel assembly 5. The fan 7 adds the laterally arranged opening 73, can intensively flow inwards and laterally by using airflow, can blow farther, and improves the heat dissipation efficiency of the coil disc assembly 5.

Referring to fig. 5, the heat-insulating cover 1 has an upward bottom view angle, and the heat-insulating cover 1 includes a side wall 10 and a bottom supporting platform 11, where the supporting platform 11 is substantially annular, and a window 12 is provided in the center. The supporting platform 11 is provided with a gap 14, the gap 14 corresponds to the first air guiding channel 826 and the first through hole 821, the guiding plate 84 of the fan bracket 8 is located right below the gap 14, and the cooling air flow is introduced into the heat-insulating cover 1 through the gap 14 to cool the coil disc assembly 5 located at the bottom of the inner pot 4. In other embodiments, the guide plate 84 can also be introduced into the recess 14.

The side wall 10 of the heat preservation cover 1 is also provided with a plurality of air guide holes 15. The position of the air guide hole 15 is close to the supporting platform 11, is positioned below the bottom wall of the inner pot 1 and is closer to the coil panel component 5. The wind guide holes 15 are uniformly distributed on the side wall in an annular shape. The cooling air flow entering the heat preservation cover 1 from the gap 14 absorbs the heat from the coil panel assembly 5, then leaves the heat preservation cover 1 from the window 12 of the heat preservation cover 1 and the air guide hole 15, and then goes out from the air outlet 32 of the base 3. The air guide holes 15 are annularly distributed around the heat preservation cover 1, so that cooling air flow is discharged through the air guide holes 15, convection is generated, and the cooling effect is better.

As shown in fig. 6, a gap is provided between the heat-insulating cover 1 and the power board 6, and the top wall 82 is located below the gap. A portion of the cold airflow sucked by the fan 7 is blown from the second air inlet to the power board 6 located on the upper side of the fan 7 through the second air guiding passage 827 due to the blockage of the top wall 82; the other part of the air passes through the first air guide passage 826 from the first air inlet and is blown to the coil panel assembly 5 which is positioned obliquely above the fan 7; by means of the guidance of the fan bracket 8, the cooling airflow respectively carries out effective cooling and heat dissipation treatment on the power panel 6 and the coil panel component 5 through 2 paths.

Referring to fig. 5, since the notches 14 reduce the strength of the supporting platform 11, in order to improve the strength of the supporting platform 11, the supporting platform 11 is formed with concave-convex structures respectively spaced along the annular direction. In this embodiment, a downwardly convex sinking platform 16 is arranged at every 60 degrees, 5 sinking platforms are arranged in total, and a boss 17 is arranged between two adjacent sinking platforms 16. The recess 14 is arranged on a projection 17.

Referring to fig. 1, the coil disk assembly includes a support ring 51, a coil disk 52, a bobbin 53, and a coil fixed on the bobbin 53, the bobbin 53 being disposed at a bottom side of the coil disk 52. The support ring 51 is fixed on the coil panel 52 and supports the inner pot 1 upwards, the whole coil panel assembly 5 abuts against the upper surface of the boss 17 of the support platform 11 of the heat-insulating cover 1 through the bottom wall of the coil panel 52, and the coil panel 52 is fixed on the support platform 11 through screws.

Because the heat preservation cover 1 is made of metal materials, the strength is high, and the heat preservation cover can bear high pressure. When the coil disc assembly 5 bears pressure, the pressure is transmitted to the heat-insulating cover 1, and the heat-insulating cover 1 is transmitted to the two side sinking platforms 16 through the bosses 17, so that the force is decomposed. This design can improve the bearing capacity of this heat preservation cover 1, improves the security performance of this heat preservation cover 1.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The utility model provides a cooking utensil's radiator unit, its includes fan and fan bracket, its characterized in that: the fan support is provided with a frame opening, the frame opening comprises a plurality of side walls and a top wall, the fan is accommodated in the frame opening and is fixed on the top wall, a first through hole and a second through hole which are communicated with the frame opening are formed in the inner side and the outer side of the top wall respectively, the side walls comprise first side walls, a third through hole is formed in the first side walls, the third through hole is communicated with the first through hole to form a first air inlet together, and the second through hole forms a second air inlet; the fan bracket is also provided with a guide plate which extends inwards and upwards in an inclined mode from the bottom edge of the first side wall.

2. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the top wall area is greater than 1/8 of the bezel area.

3. A heat sink assembly for a cooking appliance as claimed in claim 2, wherein: the area of the top wall is 1/8-9/20 of the area of the frame opening.

4. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the first through hole has a length of 56 to 62mm and a width of 12 to 18 mm.

5. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the length of the guide plate is 43 to 49 mm.

6. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the side walls further comprise a second side wall arranged opposite to the first side wall, and a third side wall and a fourth side wall which are connected with the first side wall and the second side wall, wherein the third side wall and the fourth side wall continue to extend towards the inner side and are connected with the edges of the two sides of the guide plate.

7. A heat sink assembly for a cooking appliance as claimed in claim 6, wherein: the guide plate, the third side wall and the fourth side wall form a first air guide channel, and the first air guide channel takes the first air inlet as an inlet; the second side wall, the third side wall and the fourth side wall further extend upwards to form a second air guide channel, and the second air guide channel takes the second air inlet as an inlet.

8. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the top wall and the tops of the side walls are all connected with each other.

9. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the bottom surface of the top wall is provided with a plurality of supporting pieces.

10. A heat sink assembly for a cooking appliance as claimed in claim 9, wherein: the height of the supporting piece is larger than 0.9mm and smaller than the depth of the frame opening.

11. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: and a clamping arm for clamping the fan is arranged on the fan bracket.

12. A heat sink assembly for a cooking appliance as claimed in claim 1, wherein: the fan comprises an outer frame and a fan main body located in the outer frame, a frame body of the outer frame is provided with a lateral opening, and the opening is communicated with the third through hole.

13. A heat sink assembly for a cooking appliance as claimed in claim 12, wherein: the opening is formed at the upper edge of the frame body and penetrates through the frame body upwards.

14. A heat sink assembly for a cooking appliance as claimed in claim 12, wherein: the size of the third through hole is larger than or equal to the size of the opening.

15. The utility model provides a cooking utensil, its includes shell, interior pot, heat preservation cover, coil disc subassembly and power strip, interior pot is located in the heat preservation cover, the heat preservation cover is located in the shell and including lateral wall and supporting platform, its characterized in that: the power panel is located the shell reaches between the lateral wall of heat preservation cover, coil disc subassembly is located interior pot bottom reaches between the heat preservation cover bottom, cooking utensil still includes radiator unit, radiator unit includes fan and fan support, the fan sets up the below of power panel, fan support is located the fan reaches between the power panel, fan support is equipped with a frame mouth, the frame mouth is including the roof that is located its top, the roof forms first through-hole and the second through-hole with this frame mouth intercommunication respectively in its inside and outside both sides.

16. A cooking appliance as claimed in claim 15, wherein: the top wall area is greater than 1/8 of the bezel area.

17. A cooking appliance as claimed in claim 16, wherein: the area of the top wall is 1/8-9/20 of the area of the frame opening.

18. A cooking appliance as claimed in claim 15, wherein: the first through hole has a length of 56 to 62mm and a width of 12 to 18 mm.

19. A cooking appliance as claimed in claim 15, wherein: the frame opening further comprises a first side wall, a third through hole is formed in the first side wall, the third through hole is communicated with the first through hole to form a first air inlet together, and the second through hole forms a second air inlet.

20. A cooking appliance as claimed in claim 19, wherein: the fan bracket is also provided with a guide plate which extends inwards and upwards in an inclined way from the bottom edge of the first side wall.

21. A cooking appliance as claimed in claim 20, wherein: the length of the guide plate is 43 to 49 mm.

22. A cooking appliance as claimed in claim 20, wherein: the frame mouth still is equipped with the second lateral wall that sets up with first lateral wall is relative, and connects first lateral wall reaches the third lateral wall and the fourth lateral wall of second lateral wall, the third lateral wall reaches the fourth lateral wall continues to extend to the inboard, and with the both sides edge connection of deflector.

23. A cooking appliance as claimed in claim 22, wherein: the guide plate, the third side wall and the fourth side wall form a first air guide channel, and the first air guide channel takes the first air inlet as an inlet; the second side wall, the third side wall and the fourth side wall further extend upwards to form a second air guide channel, and the second air guide channel takes the second air inlet as an inlet.

24. A cooking appliance as claimed in claim 15, wherein: the frame opening further comprises a plurality of side walls, and the top wall is connected with the tops of the side walls.

25. A cooking appliance as claimed in claim 15, wherein: the bottom surface of the top wall is provided with a plurality of supporting pieces.

26. A cooking appliance as claimed in claim 25, wherein: the height of the supporting piece is larger than 0.9mm and smaller than the depth of the frame opening.

27. A cooking appliance as claimed in claim 15, wherein: and a clamping arm for clamping the fan is arranged on the fan bracket.

28. A cooking appliance as claimed in claim 19, wherein: the fan comprises an outer frame and a fan main body positioned in the outer frame, wherein a frame body of the outer frame is provided with a lateral opening, and the opening is communicated with the third through hole.

29. A cooking appliance as claimed in claim 28, wherein: the opening is formed at the upper edge of the frame body and penetrates the frame body upwards.

30. A cooking appliance as claimed in claim 28, wherein: the size of the third through hole is larger than or equal to the size of the opening.

31. A cooking appliance as claimed in claim 15, wherein: a gap is arranged between the heat preservation cover and the power panel, and the top wall is located below the gap.

32. A cooking appliance as claimed in claim 31, wherein: the heat preservation cover comprises a side wall and a supporting platform located at the bottom, the supporting platform is provided with a notch, the notch corresponds to the first through hole, and cooling airflow passes through the first through hole and the notch to enter the heat preservation cover to dissipate heat of the coil disc assembly.