Heating device and cooking utensil

Abstract

The utility model discloses a heating device and a cooking utensil, the heating device comprises an electromagnetic heating assembly and a circuit board assembly, the electromagnetic heating assembly and the circuit board assembly are arranged in a shell and are arranged in a fall mode in the first direction, the circuit board assembly comprises a heat dissipation piece, and the heat dissipation piece and the electromagnetic heating assembly are at least partially oppositely arranged in the first direction; a first fan assembly and a second fan assembly which are used for heat dissipation are further arranged in the shell, the first fan assembly is used for blowing air to the electromagnetic heating assembly, and the second fan assembly is used for blowing air to the heat dissipation piece and further used for blowing air to the electromagnetic heating assembly for heat dissipation. And the second fan assembly can be used for blowing heat dissipation, so that the air flow passing through the electromagnetic heating assembly is increased, more heat can be taken away by more air flow, the heat dissipation efficiency is improved, the temperature of the electromagnetic heating assembly can be reduced, and the problem that the electromagnetic heating coil panel with high power can not be cooled is solved. And the heat dissipation effect is poor at the position far away from the fan.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating, in particular to a heating device and a cooking utensil. Background Art

[0002] At present, cooking scenarios, especially stir-fry scenarios, have increasingly higher requirements for the heating range of induction cookers. The larger the heating range, the larger the diameter of the electromagnetic heating coil disk is required. However, when the diameter of the electromagnetic heating coil disk becomes larger, it will bring many technical challenges, among which the heat dissipation of high-power large electromagnetic heating coil disk is a major challenge.

[0003] In the prior art, a heat dissipation fan is generally used to dissipate heat from the cable reel. This heat dissipation method often produces the following results: the heat dissipation effect is better at the cable reel close to the fan, and the temperature rise of the cable reel is low, while the heat dissipation effect is poor at the cable reel far from the fan due to the lower wind speed and higher wind temperature, and the temperature rise of the cable reel; this phenomenon is more obvious for large cable reels. Utility Model Content

[0004] The main purpose of the utility model is to provide a heating device and a cooking utensil, aiming to solve the problem that the heat dissipation effect of a high-power large electromagnetic heating coil disk is poor at a position far away from a fan.

[0005] To achieve the above purpose, the heating device proposed by the utility model includes:

[0006] A shell, wherein an air inlet and an air outlet are provided on the shell;

[0007] An electromagnetic heating assembly and a circuit board assembly, wherein the electromagnetic heating assembly and the circuit board assembly are arranged with a step difference in a first direction, and the circuit board assembly comprises a heat sink, and the heat sink and the electromagnetic heating assembly are at least partially arranged opposite to each other in the first direction; and

[0008] A first fan assembly and a second fan assembly are arranged in the shell, wherein the first fan assembly is used for blowing air toward the electromagnetic heating assembly, and the second fan assembly is used for blowing air toward the heat sink and the electromagnetic heating assembly.

[0009] In one embodiment, the first fan assembly and the second fan assembly have two air outlets, the two air outlets are respectively arranged corresponding to the electromagnetic heating assembly and the heat sink, and the two air outlets are arranged with a height difference in the first direction.

[0010] In one embodiment, the air outlet arranged corresponding to the electromagnetic heating component is at least partially arranged corresponding to a side of the electromagnetic heating component away from the heat sink;

[0011] The air outlet corresponding to the heat dissipation component is at least partially disposed corresponding to one side of the electromagnetic heating component facing the heat dissipation component.

[0012] In one embodiment, the first blower assembly includes a first blower, the second blower assembly includes a second blower, and the first blower and the second blower are arranged with a drop in the first direction.

[0013] In one embodiment, a wind guiding portion is provided on one side where the two air outlets are close to each other. The wind guiding portion has a first wind guiding surface corresponding to the electromagnetic heating component and a second wind guiding surface corresponding to the heat dissipation component, and an included angle is formed between the first wind guiding surface and the second wind guiding surface.

[0014] In one embodiment, the included angle is set to be an acute angle.

[0015] In one embodiment, the angle of the included angle is Φ, and 20° ≤ Φ ≤ 40°.

[0016] In one embodiment, the heating device further includes a flow guiding plate disposed opposite to the wind guiding portion in the circumferential direction of the first blower. The flow guiding plate extends from the circumferential side of the first blower toward the outer circumferential side of the electromagnetic heating component.

[0017] In one embodiment, a side surrounding portion is provided on the bottom of the housing;

[0018] Part of the side surrounding portion forms the wind guiding portion and the flow guiding plate.

[0019] In one embodiment, both the first blower and the second blower are configured as axial flow blowers, and the rotating shafts of the axial flow blowers extend along the first direction.

[0020] In one embodiment, a wind blocking plate is provided on the bottom of the housing. The wind blocking plate is disposed opposite to the two air outlets in the circumferential direction of the electromagnetic heating component and the circuit board assembly.

[0021] In one embodiment, the electromagnetic heating component includes:

[0022] A bracket; and,

[0023] At least one pair of winding units, each pair of winding units includes two winding units disposed on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is annularly arranged and has a first winding ring section close to the center of the bracket and a second winding ring section close to the edge of the bracket;

[0024] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units. And in at least one of the winding units, at least a partial section of the first winding ring section has a width of d1, and at least a partial section of the second winding ring section has a width of d2, where d1 is greater than d2.

[0025] In one embodiment, the electromagnetic heating assembly includes:

[0026] A bracket; and,

[0027] At least one pair of winding units, each pair of winding units includes two winding units disposed on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is annularly arranged and has a first winding ring section close to the center of the bracket and a second winding ring section close to the edge of the bracket;

[0028] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units. And in at least one of the winding units, the winding center of the winding unit is located on the side close to the second winding ring section of its geometric center.

[0029] The present utility model further provides a cooking appliance, which includes a heating device. The heating device includes:

[0030] A housing, on which an air inlet and an air outlet are provided;

[0031] An electromagnetic heating assembly and a circuit board assembly. The electromagnetic heating assembly and the circuit board assembly are arranged with a drop in a first direction. The circuit board assembly includes a heat dissipation member, and the heat dissipation member is at least partially opposite to the electromagnetic heating assembly in the first direction; and,

[0032] A first fan assembly and a second fan assembly, which are arranged in the housing. The first fan assembly is used to blow air to the electromagnetic heating assembly, and the second fan assembly is used to blow air to the heat dissipation member and the electromagnetic heating assembly.

[0033] In the technical solution provided by the present utility model, the heating device includes an electromagnetic heating component disposed in a housing and a circuit board component for controlling the operation of the electromagnetic heating component. The electromagnetic heating component and the circuit board component are arranged with a height difference in a first direction. The circuit board component includes a heat dissipation member, and the heat dissipation member is at least partially oppositely disposed with the electromagnetic heating component in the first direction. In the housing, a first blower assembly and a second blower assembly for heat dissipation are further provided. The first blower assembly is used to blow air to the electromagnetic heating component, and the second blower assembly is used to blow air to the heat dissipation member and also used to blow air to the electromagnetic heating component for heat dissipation. Since the electromagnetic heating component can be blown for heat dissipation not only by the first blower assembly but also by the second blower assembly, the air flow volume passing through the electromagnetic heating component increases, and more air flow can take away more heat, improving the heat dissipation efficiency and facilitating the reduction of the temperature of the electromagnetic heating component, so as to solve the problem of poor heat dissipation effect at the position far from the blower for a high-power large electromagnetic heating coil disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0035] Figure 1 Schematic perspective view of a partial structure of the heating device provided by the present utility model;

[0036] Figure 2 For Figure 1 Schematic view of another perspective of the heating device in

[0037] Figure 3 For Figure 2 Top view schematic of the heating device in

[0038] Figure 4 For Figure 3 Schematic view of the air outlet range of two air outlets in

[0039] Figure 5 For Figure 1 Schematic of the electromagnetic heating component in

[0040] Figure 6 For Figure 5 Schematic of the current direction after multiple winding units are energized in

[0041] Figure 7 For Figure 5Schematic diagram of magnetic field formed by each pair of winding units;

[0042] Figure 8 is Figure 5 Three-dimensional schematic diagram of multiple coil units;

[0043] Figure 9 is Figure 5 Planar schematic diagram of multiple coil units.

[0044] Explanation of reference numerals in the drawings:

[0045] 100, heating device; 1, housing; 2, electromagnetic heating component; 21, bracket; 22, winding unit; 201, first winding loop segment; 202, second winding loop segment; 3, circuit board component; 31, heat sink; 4, first fan component; 41, first fan; 5, second fan component; 51, second fan; a, air outlet; 6, air guiding part; 61, first air guiding surface; 62, second air guiding surface; 7, flow guiding plate; 8, wind shielding plate.

[0046] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0047] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0048] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0050] Currently, in the cooking scenario, especially in the stir-frying scenario, the requirement for the heating range of the induction cooker is getting higher and higher. The larger the heating range, the larger the diameter of the electromagnetic heating coil disc is required. However, when the diameter of the electromagnetic heating coil disc becomes larger, many technical challenges will arise. Among them, the heat dissipation of the high-power large electromagnetic heating coil disc is a major challenge. In the prior art, a cooling fan is generally used for the heat dissipation of the coil disc. Using this heat dissipation method often results in the following situation: the heat dissipation effect is better at the coil disc near the fan position, and the temperature rise of the coil disc is low. However, at the coil disc far from the fan position, due to the lower wind speed and higher wind temperature, the heat dissipation effect is poor and the temperature rise of the coil disc is high. This phenomenon is more obvious for large coil discs.

[0051] The present utility model provides a heating device 100 to solve the problem of poor heat dissipation at the position far from the fan for a high-power large electromagnetic heating coil disc.

[0052] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the heating device 100 includes a housing 1, an electromagnetic heating component 2, a circuit board component 3, a first fan component 4, and a second fan component 5. An air inlet and an air outlet are provided on the housing 1; the electromagnetic heating component 2 and the circuit board component 3 are arranged with a drop in the first direction. The circuit board component 3 includes a heat dissipation member 31, and the heat dissipation member 31 is at least partially oppositely arranged with the electromagnetic heating component 2 in the first direction; the first fan component 4 and the second fan component 5 are arranged inside the housing 1. The first fan component 4 is used to blow air to the electromagnetic heating component 2, and the second fan component 5 is used to blow air to the heat dissipation member 31 and the electromagnetic heating component 2.

[0053] It should be noted that, in order to improve the heating effect on the pot wall, please refer to Figures 5 to 9, in one embodiment, the electromagnetic heating assembly 2 includes a bracket 21 and at least a pair of winding units 22. Each pair of the winding units 22 includes two winding units 22 disposed on the bracket 21 and circumferentially distributed along the bracket 21. Each of the winding units 22 is annularly arranged, having a first winding loop segment 201 close to the center of the bracket 21 and a second winding loop segment 202 close to the edge of the bracket 21. In the pair of winding units 22, the current directions of the two winding units 22 are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units 22. And in at least one of the winding units 22, the width of at least a partial segment of the first winding loop segment 201 is d1, and the width of at least a partial segment of the second winding loop segment 202 is d2, where d1 is greater than d2.

[0054] In another embodiment, the electromagnetic heating assembly 2 includes a bracket 21 and at least a pair of winding units 22. Each pair of the winding units 22 includes two winding units 22 disposed on the bracket 21 and circumferentially distributed along the bracket 21. Each of the winding units 22 is annularly arranged, having a first winding loop segment 201 close to the center of the bracket 21 and a second winding loop segment 202 close to the edge of the bracket 21. In the pair of winding units 22, the current directions of the two winding units 22 are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units 22. And in at least one of the winding units 22, the winding center of the winding unit 22 is located on a side close to the second winding loop segment 202 of its geometric center.

[0055] It should be noted that the shapes of the winding units 22 in the "multiple winding units 22" of the present application can be the same or different. Each of the winding units 22 is formed by winding multiple turns of coils. Each turn of the coil in each winding unit 22 can be regarded as an annular structure. Of course, the annular structure is not only limited to a circular shape, it can be square or elliptical. Each of the winding units 22 can be laid flat along a surface area, and the surface area can be a plane or a curved surface. Each of the winding units 22 can also be bent. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0056] "The multiple winding units 22 are circumferentially distributed along the bracket 21" can be that the multiple winding units 22 are distributed in a ring shape on the same side of the bracket 21, or part of the winding units 22 are disposed on one side of the bracket 21 and another part of the winding units 22 are disposed on the other side of the bracket 21. However, as long as they are annularly distributed on the projection plane of the bracket 21, they can be regarded as "the multiple winding units 22 are circumferentially distributed along the bracket 21".

[0057] The "direction of current flow" refers to the direction of the current in the winding unit 22, which is either clockwise or counterclockwise. "The directions of the currents in the two winding units 22 are set to be opposite", that is, when the direction of the current in one winding unit 22 is clockwise, the direction of the current in the other winding unit 22 is counterclockwise.

[0058] It should be noted that according to Ampere's rule: Hold the current-carrying solenoid with the right hand and let the four fingers point in the direction of the current. Then the end pointed by the thumb is the N pole of the current-carrying solenoid. Thus, please refer to Figure 6 and Figure 7 , when the directions of the currents in the two winding units 22 are set to be opposite, a closed magnetic field is formed between the two winding units 22. For example, when one of the two winding units 22 is set as the first winding unit and the other is set as the second winding unit, when the first winding unit and the second winding unit are arranged horizontally, that is, the N pole of the magnetic pole is formed on the upper side of the first winding unit and the S pole is formed on the lower side. At the same time, the S pole of the magnetic pole is formed on the upper side of the second winding unit and the N pole is formed on the lower side. In this way, the magnetic field lines go from the N pole of the first winding unit to the S pole of the second winding unit, then from the S pole of the second winding unit to the N pole, then from the N pole of the second winding unit to the S pole of the first winding unit, and then from the S pole of the first winding unit back to the N pole of the first winding unit, thus forming a closed magnetic field.

[0059] When a pair of the winding units 22 is energized, a closed magnetic field formed between the two special-shaped magnetic poles formed by the two winding units 22 can interact with the pot wall that is far from the winding unit 22, realizing the heating of the pot wall. According to Ampere's rule, the magnetic poles formed by the winding unit 22 are corresponding to the inner ring area of the ring. When "d1 is greater than d2", or "the winding center is located on the side close to the second winding ring segment 202 of its geometric center", it makes the magnetic poles of the corresponding winding unit 22 all formed in the area close to the outer periphery of the bracket, so as to realize the largest possible heating range for the pot wall. In this way, by forming the magnetic poles in the middle of at least one winding unit 22 on the side close to the corresponding second winding ring segment 202, the magnetic poles formed in the middle of the winding unit 22 can be closer to the edge side of the bracket 21, and can interact with the position of the corresponding pot wall, increasing the heating range of the pot wall and improving the uniformity of heating for the bottom and the wall of the pot.

[0060] In a high-temperature scenario, such as when frying oil or stir-frying, because the side wall temperature of the pot is too high, when the heating device 100 is set as an induction cooker, it will cause the problem of too high temperature at the upper cover of the panel of the heating device 100, so the heat dissipation requirement is also higher.

[0061] It should be noted that "drop" means that in the first direction, when the thicknesses of the electromagnetic heating component 2 and the circuit board component 3 in the first direction are close, there is a difference in the distances between the geometric centers of the electromagnetic heating component 2 and the circuit board component 3 and the bottom of the shell 1 in the first direction; and when the difference in thicknesses of the electromagnetic heating component 2 and the circuit board component 3 in the first direction is too large, there is a difference in the distances between the two end faces of the electromagnetic heating component 2 and the circuit board component 3 on the same side in the first direction and the bottom of the shell 1.

[0062] It can be understood that, in the shell 1, the inner wall of the shell 1 forms an air supply duct connecting the air inlet and the air outlet, and when the first fan assembly 4 blows air to the electromagnetic heating assembly 2, an airflow flowing from the air inlet to the air outlet is formed in the shell 1, and when the second fan assembly 5 blows air to the circuit board assembly 3, an airflow flowing from the air inlet to the air outlet is also formed in the shell 1. Because the first fan assembly 4 and the second fan assembly 5 both blow air to the electromagnetic heating assembly 2, the amount of air flow around the electromagnetic heating assembly 2 increases, and more air flow can take away more heat; at the same time, the first fan assembly 4 and the second fan assembly 5 can provide heat dissipation in a wider range, so that the surface temperature of the entire electromagnetic heating assembly 2 is more uniform, avoiding local overheating. In addition, when the first fan assembly 4 fails, the second fan assembly 5 can also blow air to the electromagnetic heating assembly 2 to dissipate heat, thereby ensuring the reliability of the heat dissipation system.

[0063] It should be noted that the second fan component 5 can blow air to the electromagnetic heating component 2 directly or indirectly.

[0064] During direct blowing, since the electromagnetic heating component 2 and the heat sink 31 are arranged with a height difference in the first direction, the air supply range of the air supply port of the second fan component 5 can be increased so that the electromagnetic heating component 2 is also within the air supply range of the second fan component 5; the air supply direction of the second fan component 5 can also be tilted so that the electromagnetic heating component 2 is also at least partially in the air supply path of the second fan component 5.

[0065] During indirect blowing, because the electromagnetic heating component 2 and the heat sink 31 are arranged with a height difference in the first direction, and when there is a height difference in the air supply direction between the first fan component 4 and the second air supply component in the first direction, the air supply range of the second fan component 5 is at least partially opposite to the air supply range of the first air supply component in the first direction, then there is a pressure difference between the sides of the first fan component 4 and the second fan component 5 that are close to each other, so that air flow is generated in the first direction, thereby enabling the second fan component 5 to supply air and dissipate heat to the electromagnetic heating component 2.

[0066] In the technical solution provided by the utility model, the heating device 100 includes an electromagnetic heating component 2 arranged in a shell 1, and a circuit board component 3 for controlling the operation of the electromagnetic heating component 2. The electromagnetic heating component 2 and the circuit board component 3 are arranged with a step difference in the first direction. The circuit board component 3 includes a heat sink 31. The heat sink 31 and the electromagnetic heating component 2 are at least partially arranged opposite to each other in the first direction. A first fan component 4 and a second fan component 5 for heat dissipation are also arranged in the shell 1. The first fan component 4 is used to blow air to the electromagnetic heating component 2, and the second fan component 5 is used to blow air to the heat sink 31 and also to the electromagnetic heating component 2 for heat dissipation. Because the electromagnetic heating component 2 can be cooled by blowing air through the first fan component 4 and the second fan component 5 in addition to cooling by blowing air through the first fan component 4, the air flow through the electromagnetic heating component 2 is increased, more air flow can take away more heat, improve the heat dissipation efficiency, and help to reduce the temperature of the electromagnetic heating component 2, so as to solve the problem of poor heat dissipation effect at a position far away from the fan for a large-power large electromagnetic heating coil disk.

[0067] In an embodiment of the utility model, the first fan assembly 4 and the second fan assembly 5 have two air outlets a, and the two air outlets a are respectively arranged corresponding to the electromagnetic heating assembly 2 and the heat sink 31, and the two air outlets a are arranged with a drop in the first direction. In this way, the air outlet directions of the two air outlets a are also arranged with a drop in the first direction, because the two air outlets a are respectively arranged corresponding to the electromagnetic heating assembly 2 and the heat sink 31, one of the air outlets a can dissipate heat to the maximum extent on the plane where the corresponding electromagnetic heating assembly 2 is located, and the other air outlet a can dissipate heat to the maximum extent on the plane where the corresponding circuit board assembly 3 is located, and at the same time, when there is a wind pressure difference between the two air outlets a, air flowing along the first direction is generated, so that the electromagnetic heating assembly 2 in the air flow path can also further dissipate heat.

[0068] It should be noted that "the two air outlets a are arranged with a step difference in the first direction" means that in the first direction, when the sizes of the two air outlets a are basically the same, there is a difference in the distances between the geometric centers of the two air outlets a and the bottom of the shell 1 in the first direction; when the sizes of the two air outlets a are greatly different, there is a difference in the distances between the peripheries of the two air outlets a on the same side in the first direction and the bottom of the shell 1.

[0069] In an embodiment of the utility model, the air outlet a corresponding to the electromagnetic heating component 2 is at least partially arranged to correspond to the side of the electromagnetic heating component 2 away from the heat sink 31, so that the airflow of the air outlet a can blow through the upper side of the electromagnetic heating component 2, reducing the obstruction of the airflow by the peripheral side of the electromagnetic heating component 2; the air outlet a corresponding to the heat sink 31 is at least partially arranged to correspond to the side of the electromagnetic heating component 2 facing the heat sink 31. In this way, the airflow of the air outlet a can blow through the lower side of the electromagnetic heating component 2, and can also reduce the obstruction of the airflow by the peripheral side of the electromagnetic heating component 2. At the same time, when the air from the lower side of the electromagnetic heating component 2 can generate convection with the air on the upper side of the electromagnetic heating component 2, the heat exchange surface between the air flowing along the first direction and the electromagnetic heating component 2 is as large as possible, thereby improving the heat dissipation efficiency.

[0070] Because the electromagnetic heating component 2 can heat the pot wall, its heating area is larger, so that the area of ​​the shell corresponding to the heating area is increased. The two air outlets a are arranged on the sides of the electromagnetic heating component 2 and the heat sink 31, so that the airflow can cover all areas corresponding to the heating area as much as possible, thereby achieving the purpose of sufficient heat dissipation.

[0071] Further, in this embodiment, in the first direction, the two air outlets a are arranged on both sides of the electromagnetic heating component 2. Correspondingly, the heat sink 31 is arranged on the lower side of the electromagnetic heating component 2, and is completely staggered from the electromagnetic heating component 2 in the first direction, and the airflows generated by the two air outlets a are also staggered in the first direction, so as to avoid airflow turbulence when converging, and facilitate the generation of orderly flowing air in the first direction.

[0072] Further, in this embodiment, the first fan assembly 4 includes a first fan 41, and the second fan assembly 5 includes a second fan 51. The first fan 41 and the second fan 51 are arranged with a drop in the first direction. The wind wheel of the first fan 41 can be arranged flush with the corresponding air outlet a, and at the same time, the wind wheel of the second fan 51 can be arranged flush with the corresponding air outlet a. Since the air outlet a of the wind wheel part of the fan is more easily pushed by the high-speed air flow generated by the wind wheel, the kinetic energy and speed of the air outlet are increased, and the air output is improved. In this way, the first fan 41 and the second fan 51 are respectively corresponding to the two air outlets a, so that both the first fan 41 and the second fan 51 can exert the maximum air output as much as possible, and the heat dissipation efficiency is improved.

[0073] Further, in an embodiment of the present invention, a wind guiding part 6 is arranged on one side where the two air outlets a are close to each other. The wind guiding part 6 has a first wind guiding surface 61 corresponding to the electromagnetic heating component 2 and a second wind guiding surface 62 corresponding to the heat dissipation part 31. An included angle is formed between the first wind guiding surface 61 and the second wind guiding surface 62. With such a setting, the wind generated by the first fan 41 can flow along the first wind guiding surface 61, and the wind generated by the second fan 51 can flow along the second wind guiding surface 62. It also enables the air output on the side where the first fan 41 and the second fan 51 are close to each other to generate an air flow passing through the electromagnetic heating component 2 on the side far from the first fan 41 and the second fan 51. The inclination angles of the first wind guiding surface 61 and the second wind guiding surface 62 determine the area of the overlapping region of the two fans in the first direction.

[0074] In an embodiment of the present invention, the included angle is set as an acute angle. In this way, the air flows generated by the first fan 41 and the second fan 51 can both flow towards the same side. If the included angle is set as a right angle or an obtuse angle, the air flows generated by the first fan 41 and the second fan 51 tend to cancel each other out, which is not conducive to the improvement of the air volume. Preferably, the angle of the included angle is Φ, and 20° ≤ Φ ≤ 40°. In this way, while facilitating the improvement of the air output of each fan, a relatively large convection interval can be generated in the first direction, and the heat dissipation surface of the electromagnetic heating component 2 can be improved.

[0075] Furthermore, in the embodiment of the present utility model, the heating device 100 further includes a deflector 7 disposed opposite to the air guiding portion 6 in the circumferential direction of the first blower 41, and the deflector 7 extends from the circumferential side of the first blower 41 towards the outer circumferential side of the electromagnetic heating assembly 2; by extending the deflector 7 to the end of the electromagnetic heating assembly 2 away from the first blower 41, the air volume can be guided and concentrated there, strengthening the heat dissipation of the electromagnetic heating assembly 2 at this location, and also having the effect of reducing wind noise.

[0076] In this embodiment, a side surround portion is provided on the bottom of the housing 1; a part of the side surround portion forms the air guiding portion 6 and the deflector 7. In this way, the side surround portion can be directly bent and surrounded around the outer periphery of the first blower 41 and the second blower 51, and the two air outlets a are formed by the bending radian and shape. The structure is simple and the manufacturing cost is relatively low. And in order to enable the air guiding portion 6 to form the required included angle, the bending angle can be adjusted when the side surround portion is bent.

[0077] In this embodiment, in order to save costs and reasonably arrange the blowers in a limited space, both the first blower 41 and the second blower 51 are configured as axial flow blowers, and the rotating shafts of the axial flow blowers extend along the first direction. In this way, using the axial flow blowers, the design is relatively simple and the structure is light, which is suitable for electromagnetic cooking appliances such as those that require efficient heat dissipation but have limited space. And since the fan blades of the axial flow blowers are installed axially, the noise generated during operation is relatively small, and more air can be moved under the same conditions, achieving a better heat dissipation effect.

[0078] Furthermore, in the embodiment of the present utility model, a wind shield 8 is provided on the bottom of the housing 1, and the wind shield 8 is disposed opposite to the two air outlets a in the circumferential direction of the electromagnetic heating assembly 2 and the circuit board assembly 3. If the first blower 41 and the second blower 51 are configured as axial flow blowers, the air flow generated is restricted by the bottom and top of the housing 1, and very little air volume is generated in the first direction. Most of the air flows along the flow surface formed by the second direction and the third direction where the electromagnetic heating assembly 2 and the circuit board assembly 3 are located. At this time, by providing the wind shield 8, a certain amount of air flow towards the flow surface can be blocked, thereby strengthening the air volume in the first direction, allowing the air to directly blow the electromagnetic heating assembly 2 above, and enhancing the heat dissipation efficiency of the electromagnetic heating assembly 2.

[0079] The present utility model also provides a cooking appliance. Please refer to Figure 8, the cooking appliance includes the heating device 100 described above. The cooking appliance includes a rice cooker, an electric pressure cooker, or an induction cooker. Since the cooking appliance includes the heating device 100, the specific structure of the heating device 100 refers to the above embodiments. Since the heating device 100 of this cooking appliance adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0080] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A heating device, characterized in that: include: A shell, wherein an air inlet and an air outlet are provided on the shell; An electromagnetic heating assembly and a circuit board assembly, wherein the electromagnetic heating assembly and the circuit board assembly are arranged with a step difference in a first direction, and the circuit board assembly comprises a heat sink, and the heat sink and the electromagnetic heating assembly are at least partially arranged opposite to each other in the first direction; as well as, A first fan assembly and a second fan assembly are arranged in the shell, wherein the first fan assembly is used for blowing air toward the electromagnetic heating assembly, and the second fan assembly is used for blowing air toward the heat sink and the electromagnetic heating assembly.

2. The heating device according to claim 1, characterized in that The first fan assembly and the second fan assembly have two air outlets, and the two air outlets are respectively arranged corresponding to the electromagnetic heating assembly and the heat sink, and the two air outlets are arranged with a height difference in the first direction.

3. The heating device according to claim 2, characterized in that The air outlet arranged corresponding to the electromagnetic heating component is at least partially arranged corresponding to a side of the electromagnetic heating component away from the heat sink; The air outlet arranged corresponding to the heat sink is at least partially arranged corresponding to a side of the electromagnetic heating component facing the heat sink.

4. The heating device according to any one of claims 1 to 3, characterized in that: The first fan assembly includes a first fan, the second fan assembly includes a second fan, and the first fan and the second fan are arranged with a height difference in the first direction.

5. The heating device according to claim 2, characterized in that: An air guide portion is provided on the side where the two air outlets are close to each other, and the air guide portion has a first air guide surface provided corresponding to the electromagnetic heating component, and a second air guide surface provided corresponding to the heat dissipation component, and an angle is formed between the first air guide surface and the second air guide surface.

6. The heating device according to claim 5, characterized in that The included angle is set to be an acute angle.

7. The heating device according to claim 5, characterized in that The angle is Φ, 20°≤Φ≤40°.

8. The heating device according to claim 5, characterized in that The heating device further includes a guide plate disposed opposite to the air guide portion in a circumferential direction of the first fan, and the guide plate extends from a circumferential side of the first fan toward an outer circumferential side of the electromagnetic heating component.

9. The heating device according to claim 8, characterized in that A side surrounding portion is provided on the bottom of the shell; The portion on the side surrounding portion forms the wind guide portion and the air guide plate.

10. The heating device according to claim 5, characterized in that The first fan and the second fan are both configured as axial flow fans, and the rotating shafts of the axial flow fans extend along the first direction.

11. The heating device according to claim 10, characterized in that A wind shield is arranged on the bottom of the shell, and the wind shield is arranged opposite to the two air outlets in the circumferential direction of the electromagnetic heating assembly and the circuit board assembly.

12. The heating device according to any one of claims 1 to 11, characterized in that: The electromagnetic heating assembly comprises: stents; and, At least one pair of winding units, each pair of the winding units comprising two winding units arranged on the bracket and distributed along the circumference of the bracket, each of the winding units being arranged in an annular shape and having a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket; In the pair of winding units, the directions of the currents of the two winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two winding units, and in at least one of the winding units, the width of at least part of the first winding loop segment is d1, and the width of at least part of the second winding loop segment is d2, and d1 is greater than d2.

13. The heating device according to any one of claims 1 to 11, characterized in that: The electromagnetic heating assembly comprises: stents; and, At least one pair of winding units, each pair of the winding units comprising two winding units arranged on the bracket and distributed along the circumference of the bracket, each of the winding units being arranged in an annular shape and having a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket; In the pair of winding units, the directions of the currents of the two winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two winding units, and in at least one of the winding units, the winding center of the winding unit is located on the side of its geometric center close to the second winding loop segment.

14. A cooking utensil, characterized in that: Comprising a heating device as claimed in any one of claims 1 to 13.

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