Heating machine

Abstract

To provide a heating apparatus that can efficiently cool heated components.SOLUTION: A heating apparatus includes a first heating portion, a first element unit that drives the first heating portion, a first heat sink disposed in the first element unit, a fan that blows air, an air path unit that forms the direction of air from the fan, a casing that accommodates the first heating portion, the first element unit, the first heat sink, and the air path unit, and has an exhaust port at the rear of the apparatus, and the air path unit includes a first air path 35 that guides air from the fan, and a second air path 36 that intersects with the first air path and extends toward the rear, and the first heat sink is disposed in the second air path.SELECTED DRAWING: Figure 6

Description

Technical Field

[0004] , ,

[0005] , , , ,

[0001] The present disclosure relates to heating equipment.

Background Art

[0002] Patent Document 1 discloses a cooking heater that cools a plurality of inverter boards. This cooking heater includes a plurality of heating coils, an inverter board having an inverter circuit that supplies an alternating current to each heating coil, and a cooling intake fan for taking in air from an intake port formed at the rear. According to this cooking heater, the air taken in from the intake port by the intake fan is directly blown onto the inverter board to cool the heat-generating inverter board.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0006] According to the heating device in this disclosure, the air blown from the fan is sent via the first air passage of the air passage unit to a second air passage that intersects the first air passage and extends to the rear, thereby bringing it into contact with the first heat sink provided in the second air passage, and then sending it to the rear exhaust port, thus efficiently cooling the first heat sink. [Brief explanation of the drawing]

[0007] [Figure 1] Perspective view of an induction cooker in Embodiment 1 [Figure 2] Top view of the inside of an induction cooker in Embodiment 1 [Figure 3] Top view of the inside of an induction cooker in Embodiment 1 [Figure 4] Electrical configuration diagram of the inverter circuit section of the control board for the left and right coils in Embodiment 1 [Figure 5] Top view of the inside of an induction cooker in Embodiment 1 [Figure 6] Top view of the inside of an induction cooker in Embodiment 1 [Modes for carrying out the invention]

[0008] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily verbose and to facilitate understanding for those skilled in the art.

[0009] The attached drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0010] (Embodiment 1) Embodiment 1 will be described below with reference to Figures 1 to 6.

[0011] [1-1. Structure] [1-1-1. Overall configuration of an induction cooktop] In the following text, the terms front, back, left, and right refer to the positional relationship of the device body relative to the front.

[0012] In Figure 1, the induction cooktop consists of a top unit 1 and a main unit 2. The top unit 1 includes a glass plate 3, a frame 4, and an operating interface 5. The glass plate 3 is rectangular in shape and made of heat-resistant glass such as crystallized glass. The glass plate 3 is placed on the top surface of the induction cooktop, and cooking containers such as pots are placed on its top surface. The frame 4 is used to connect the glass plate 3 to the main unit 2. This frame 4 is made of metal and surrounds the outer periphery of the glass plate 3. Furthermore, the operating interface 5 is located in front of the top unit 1 and receives heating commands for the induction cooktop. This operating interface 5 can be appropriately selected from mechanical switches, electrostatic switches, touch switches, touch LCDs, etc.

[0013] Referring further to Figure 2, the main unit 2 comprises an upper housing 6, a lower housing 7, a left coil unit 8 which is the second heating section, a right coil unit 9 which is the first heating section, a rear coil unit 10 which is the third heating section, a fan 11, control boards 12 for the left and right coils, a control board 13 for the rear coil, and an airflow unit 14. The upper housing 6 houses the left coil unit 8, the right coil unit 9, the rear coil unit 10, the fan 11, the control boards 12 for the left and right coils, the control board 13 for the rear coil, and the airflow unit 14. This upper housing 6 has a box-like shape with a hollow interior and is made of metal. On the other hand, the lower housing 7 also has a box-like shape with a hollow interior and is made of metal, and is fixed to the upper housing 6 with screws or the like. This lower housing 7 houses the grill unit 15 (Figure 1). The grill unit 15 is positioned biased to either the left or right side within the housing. In this embodiment, it is positioned biased to the left when viewed from the front in the drawing. In other words, the center of the lower housing 7 in the left-right direction is positioned to the left of the center of the IH cooker in the left-right direction. This grill unit 15 is equipped with a heater and performs heating and cooking. In this embodiment, the grill unit 15 is positioned off-center to the left when viewed from the front, but it is not limited to this position; it may also be positioned off-center to the right when viewed from the front, or it may be positioned in the central part of the housing when viewed from the front.

[0014] The left coil unit 8, the right coil unit 9, and the rear coil unit 10 each heat the pot placed on the glass plate 3 by induction heating. The left coil unit 8 is positioned on the front left side when viewed from the top. The right coil unit 9 is positioned on the front right side when viewed from the top. The rear coil unit 10 is positioned behind the left coil unit 8 and the right coil unit 9 when viewed from the top. The left coil unit 8, the right coil unit 9, and the rear coil unit 10 are each equipped with a coil, ferrite, a case to house the ferrite and coil, and a temperature sensor, similar to known technologies, although not specifically shown in the figures. The left and right coil control board 12 controls the heating of the left coil unit 8 and the right coil unit 9. This left and right coil control board 12 is positioned below the left coil unit 8 and the right coil unit 9, and is offset to the left when viewed from the top. The specific configuration of the left and right coil control board 12 will be described later. The rear coil control board 13 controls the heating of the rear coil unit 10. After this, the coil control board 13 is viewed from the top and is the left and right coil control boards 12 It is located to the right of the fan 11 and behind it.

[0015] Fan 11 cools the left coil unit 8, the right coil unit 9, the rear coil unit 10, the left and right coil control boards 12, and the rear coil control board 13. When viewed from the top, fan 11 is positioned on the right front. The airflow unit 14 guides the air generated from fan 11. When viewed from the top, airflow unit 14 is positioned to the left of fan 11. Airflow unit 14 has multiple inner walls to allow the air from fan 11 to branch. The cooling air generated from fan 11 cools various components and flows from the front to the back of the enclosure, and is discharged through exhaust port 16 located at the rear of the enclosure. Exhaust port 16 has a first exhaust port 17 and a second exhaust port 18. The first exhaust port 17 is positioned on the right rear when viewed from the top, and the second exhaust port 18 is positioned on the left rear when viewed from the top.

[0016] [1-1-2. Configuration of the control board for the left and right coils] As shown in Fig. 3, the control board 12 for the left and right coils is composed of a rectifier section 19, a control section 20 for the left coil unit, and a control section 21 for the right coil unit. Also, an electrical configuration diagram of the control board 12 for the left and right coils is shown in Fig. 4. The rectifier section 19, the control section 20 for the left coil unit, and the control section 21 for the right coil unit each include a first heat sink 22, a second heat sink 23, and a third heat sink 24. Note that the heat sink is used to dissipate the accumulated heat stored in the components that generate heat during induction heating. The rectifier section 19 includes a first diode bridge 25 and a third heat sink 24. The amount of heat generated by the rectifier section 19 is smaller than the amount of heat generated by each of the first element unit and the second element unit described later. The first diode bridge 25 rectifies the AC power supply of 200V and converts it to DC. The first diode bridge 25 is at the center of the control board 12 for the left and right coils and is arranged on the side surface of the third heat sink 24. The third heat sink 24 is arranged at the center of the control board 12 for the left and right coils.

[0017] The control section 21 for the right coil unit includes a first IGBT 26 for the right coil unit 9, a second IGBT 27, a first heat sink 22, a first coil 28 which is a first coil component, and a plurality of capacitors 29 for the right. Note that the IGBT is a switching element used to drive the inverter circuit. The first IGBT 26 and the second IGBT 27 are used to convert the input power supply into a high-frequency power supply. Here, the first IGBT 26 and the second IGBT 27 constitute the first element unit. The first heat sink 22 is attached to the first IGBT 26 and the second IGBT 27, and the accumulated heat is dissipated through the first heat sink 22. The first heat sink 22 is on the right side of the control board 12 for the left and right coils and is arranged on the left side of the fan 11.

[0018] The first heat sink 22 is divided into a front side and a rear side, and a space is formed between the front side and the rear side. The first IGBT 26 is attached to the right side surface of the front first heat sink 22, and the second IGBT 27 is attached to the right side surface of the rear first heat sink 22. The first IGBT 26 and the second IGBT 27 are arranged on the right side surface of the first heat sink 22 so as to be separated from the third IGBT 30 and the fourth IGBT 31. The first coil 28 is used for noise removal and is arranged at the rear right corner of the first heat sink 22. The plurality of right capacitors 29 are used as smoothing and resonance capacitors and are arranged on the right side of the first heat sink 22.

[0019] The control unit 20 for the left coil unit includes the third IGBT 30 for the left coil unit 8, the fourth IGBT 31, the second heat sink 23, the second coil 32, and the plurality of left capacitors 33. Here, the third IGBT 30 and the fourth IGBT 31 constitute the second element unit. The second coil 32, which is a second coil component, is used for noise removal. Since the common functions and structures with the control unit 21 for the right coil unit are the same, the description thereof is omitted. And the second heat sink 23 is arranged on the left side of the first heat sink 22 and on the right side of the third heat sink 24.

[0020] The second heatsink 23 is divided into a front and a rear section, with a space between the front and rear sections. The third IGBT 30 is mounted on the left side of the front section of the second heatsink 23, and the fourth IGBT 31 is mounted on the left side of the rear section of the second heatsink 23. The second coil 32 is located downstream of the first heatsink 22 in the direction of airflow from the fan 11, closer to the first heatsink 22 than the first coil 28, and upstream of the first coil 28 in the direction of airflow from the fan 11. In other words, the first heatsink 22, the second coil 32, and the first coil 28 are arranged in this order from upstream to downstream in the direction of airflow of the second air passage 36. That is, the second coil 32 is located directly downstream of the first heatsink 22 and closer to the first heatsink 22 than the first coil 28. Multiple left-side capacitors 33 are located to the left of the second heatsink 23 or to the right of the third heatsink 24.

[0021] The third coil 34 is located in the back left of the circuit board and is used for noise reduction.

[0022] [1-1-3. Configuration of the control board for the rear coil] As shown in Figure 5, the control board 13 for the rear coil includes a second diode bridge 50, a fourth heatsink 51 for the second diode bridge 50, a fifth IGBT 52, a sixth IGBT 53, a fifth heatsink 54 for the fifth IGBT 52 and the sixth IGBT 53, a fourth coil 55, a fifth coil 56, and a plurality of rear capacitors 57.

[0023] The arrangement of each component is as follows: the second diode bridge 50 is mounted on the left side of the fourth heatsink 51. The fifth coil 56 is positioned to the front left of the rear coil control board 13, and the fourth heatsink 51 is positioned behind the fifth coil 56. The fifth IGBT 52 and the sixth IGBT 53 are mounted on the right side of the fifth heatsink 54. The fifth heatsink 54 is positioned in the front center of the rear coil control board 13, with multiple rear capacitors 57 positioned to its right. The fourth coil 55 is positioned to the rear left of the rear coil control board 13.

[0024] [1-1-4. Airflow Unit Configuration] In Figure 6, the airflow unit 14 has a housing structure with multiple inner walls, and includes a first airflow passage 35, a second airflow passage 36 branching off from the first airflow passage 35, a third airflow passage 37 branching off from the first airflow passage 35, and a fourth airflow passage 38 and a fifth airflow passage 39 branching off from the first airflow passage 35. Next, I will explain each airflow path.

[0025] The first air passage 35 is directly connected to the outlet of the fan 11 and sends the air from the fan 11 horizontally from right to left. In other words, the first air passage 35 is provided in a straight line from the right side, which is one end of the device body, toward the center of the device body, along the direction of airflow from the outlet of the fan 11. The second air passage 36, the third air passage 37, the fourth air passage 38, and the fifth air passage 39 are formed by gradually branching off from the first air passage 35 in the order from the upstream side to the downstream side in the direction of airflow of the wind moving through the first air passage 35. First, the second air passage 36 branches off from the first air passage 35 by the first inner wall 40 within the air passage unit 14. Next, the third air passage 37 branches off from the first air passage 35 by the second inner wall 41 of the first air passage 35, which has narrowed in width. Furthermore, the fourth air passage 38 and the fifth air passage 39 branch off from the first air passage 35 by the third inner wall 42 of the first air passage 35, which has narrowed even further in width.

[0026] Furthermore, the distance between each inner wall (first inner wall 40, second inner wall 41, third inner wall 42) in each air passage (second air passage 36 to fifth air passage 39) and the opposing inner surface on the front side of the air passage unit 14 is formed to decrease from the upstream side to the downstream side in the airflow direction, thereby setting the width of each air passage. Specifically, the distance between the first inner wall 40 in the first air passage 35 and the opposing inner surface is set in the first air passage 35 The distance between the second inner wall 41 and the inner surface facing it in the first air passage 35 is set to be greater than the distance between the second inner wall 41 and the inner surface facing it in the first air passage 35, and the distance between the second inner wall 41 and the inner surface facing it in the first air passage 35 is set to be greater than the distance between the third inner wall 42 and the inner surface facing it in the first air passage 35.

[0027] Furthermore, each airflow path will be explained. The second air passage 36 intersects with the first air passage 35 and directs the air towards the rear, and the first heat sink 22 is positioned within this second air passage 36.

[0028] Furthermore, the third air passage 37 is provided spaced apart from the fan 11 relative to the second air passage 36 and is positioned to the left of the second air passage 36. This third air passage 37 intersects with the first air passage 35 and directs air towards the rear, and the second heat sink 23 is positioned within this third air passage 37.

[0029] Furthermore, the fourth air passage 38 is positioned spaced apart from the fan 11 relative to the third air passage 37, and is located to the left of the third air passage 37. The third heatsink 24 is placed inside this fourth air passage 38.

[0030] Finally, the fifth air passage 39 is positioned away from the fan 11 relative to the fourth air passage 38 and directs air towards the back left of the casing.

[0031] As shown in Figure 5, a sixth air passage 58 may be formed behind the fan 11 in the air passage unit 14. Specifically, the sixth air passage 58 has an air outlet on the side of the air passage unit 14 corresponding to the rear coil control board 13, and air is blown towards the rear coil control board 13 through this air outlet. The components of the rear coil control board 13 (second diode bridge 50, fourth heat sink 51, fifth IGBT 52, sixth IGBT 53, fifth heat sink 54, fourth coil 55, fifth coil 56, and multiple rear capacitors 57) are arranged inside the sixth air passage 58.

[0032] [1-2. Operation] The operation based on the above configuration will be explained below. Here, we will explain the operation of the cooling air during induction heating using the control board 12 for the left and right coils. The inverter circuit on the control board 12 for the left and right coils is driven to generate a high-frequency magnetic field from the heating coil. Then, the pot placed on the upper surface of the glass plate 3 is heated by electromagnetic induction. At this time, each component (IGBT, coil, capacitor) on the control board 12 for the left and right coils generates heat in conjunction with the heating operation. Heat is also transferred from the heated IGBT, causing the heatsink to heat up as well.

[0033] At this time, as described above, the first air passage 35 blows air horizontally from right to left from the outlet of the fan 11. The air sent into the first air passage 35 is gradually branched by the air passage unit 14 into the second air passage 36, the third air passage 37, the fourth air passage 38, and the fifth air passage 39.

[0034] Then, in the second air passage 36, the air blown in from the first air passage 35 cools the first IGBT 26, the second IGBT 27, the first heat sink 22, the second coil 32, the first coil 28, and the multiple right-hand capacitors 29, all of which are located within the second air passage 36, from the upstream side to the downstream side in the direction of airflow.

[0035] Furthermore, in the third air passage 37, the third IGBT 30, the fourth IGBT 31, and the second heat sink 23, which are located within the third air passage 37, are cooled by the airflow supplied from the first air passage 35, from the upstream side to the downstream side in the direction of airflow.

[0036] Furthermore, in the fourth air passage 38, the airflow supplied from the first air passage 35 cools the first diode bridge 25, the third heat sink 24, and the multiple left-hand capacitors 33 located within the fourth air passage 38, from the upstream side to the downstream side in the direction of airflow. Furthermore, in the fifth air passage 39, the third coil 34, which is located within the fifth air passage 39, is cooled by the air supplied from the first air passage 35.

[0037] In this case, the components of the control unit 21 for the right coil unit (first IGBT 26, second IGBT 27, first heat sink 22, first coil 28, and multiple right-side capacitors 29) are positioned closer to the fan 11 than the components of the control unit for the left coil unit, and by placing all of them in the second air passage 36, relatively fresh cooling air can be supplied, and a cooling effect can be expected.

[0038] On the other hand, the components of the left coil unit control unit 20 (third IGBT 30, fourth IGBT 31, second heat sink 23, second coil 32, and multiple left-side capacitors 33) are spaced further apart from the fan 11 than the components of the right coil unit control unit 21, and are not concentrated within the same airflow path. By distributing the cooling system across the second airflow path 36, the third airflow path 37, and the fourth airflow path 38, the cooling system will be independently controlled within each airflow path.

[0039] The air passing through the second air passage 36, the third air passage 37, and the fourth air passage 38 cools the respective components before flowing to the first exhaust port 17 at the rear right of the casing and being discharged outside the casing. The air passing through the fifth air passage 39 cools the coil 34 before flowing to the second exhaust port 18 at the rear left of the casing and being discharged outside the casing.

[0040] Here, we will also explain the operation of the cooling air during induction heating using the rear coil control board 13. Similar to the left and right coil control boards 12, each component (second diode bridge 50, fourth heat sink 51, fifth IGBT 52, sixth IGBT 53, fifth heat sink 54, fourth coil 55, fifth coil 56, and multiple rear capacitors 57) generates heat during induction heating.

[0041] In this sixth air passage 58, the air blown in from the air outlet cools each component (second diode bridge 50, fourth heat sink 51, fifth IGBT 52, sixth IGBT 53, fifth heat sink 54, fourth coil 55, fifth coil 56, and multiple downstream capacitors 57) located within the sixth air passage 58, from upstream to downstream in the direction of airflow. After the air passing through the sixth air passage 58 has cooled the above components, it flows to the first exhaust port 17 at the rear right of the enclosure and is discharged outside the enclosure.

[0042] [1-3. Effects] According to the IH cooker of this disclosure, the air blown from the fan 11 is sent to each of the air passages from the first air passage 35 to the fifth air passage 39, which intersect the first air passage 35 of the air passage unit 14 and extend to the rear. By bringing the air into contact with the components placed in each air passage, the components are cooled, and then the air is sent to the exhaust port at the rear. This has the effect of efficiently cooling each component placed in each air passage.

[0043] Furthermore, the cooling effect when the left coil unit 8 inductively heats a pot using the IH cooker of this disclosure will be explained. When heating is performed by the left coil unit 8, the third IGBT 30, the fourth IGBT 31, the second heat sink 23, the second coil 32, and the multiple left capacitors 33 for the left coil unit 8 of the left coil unit control unit 20 generate heat.

[0044] Here, assuming all components are placed within the same airflow path, the third IGBT 30, the fourth IGBT 31, the second heatsink 23, and the multiple left-hand capacitors 33 are cooled. The heat-storing air from the second coil comes into contact with the second coil 32, which is located at the rear downstream of the airflow direction, and there is a possibility that the second coil 32 may not be able to be cooled sufficiently. In contrast, according to the IH cooker of this disclosure, the second coil 32 is located in the second air passage 36, while the third IGBT 30, the fourth IGBT 31, the second heat sink 23, and the multiple left-side capacitors 33 are distributed within the third air passage 37. As a result, the cooling air moving within the second air passage 36 comes into contact with the second coil 32, and the cooling air moving within the third air passage 37 comes into contact with the third IGBT 30, the fourth IGBT 31, the second heat sink 23, and the multiple left-side capacitors 33. This allows each component to be cooled individually, and an improvement in overall cooling efficiency can be expected.

[0045] (Other embodiments) Embodiment 1 described a configuration having control boards for the left and right coils and a control board for the rear coil, but it is not limited to this and can also be applied to configurations that have only control boards for the left and right coils, for example. This disclosure is not limited to induction cooktops, but can also be applied to other heating devices. Since the embodiments described above are for illustrative purposes of the technology described herein, various modifications, substitutions, additions, omissions, etc., can be made within the claims or their equivalents. [Industrial applicability]

[0046] This disclosure is applicable to heating equipment such as induction cookers. [Explanation of symbols]

[0047] 1 Top Unit 2 Main Unit 3 Glass Plate 4 frames 5. Operating Interface 6 Upper cabinet 7 Lower cabinet 8 Left coil unit 9 Right coil unit 10 Rear coil unit 11 Fans 12 Control board for left and right coils 13. Control board for rear coil 14 Airflow Unit 15 Grill Unit 16 Exhaust vents 17 First exhaust port 18 Second exhaust port 19 Rectifier section 20 Control unit for left coil unit 21 Control unit for right coil unit 22 First Heatsink 23 Second heatsink 24 Third heatsink 25 First Diode Bridge 26 First IGBT 27 Second IGBT 28 First Coil 29 Multiple right-hand capacitors 30 Third IGBT 31 Fourth IGBT 32 Second coil 33 Multiple left-hand capacitors 34 Third coil 35 First Wind Route 36 Second wind path 37 Third Wind Route 38 Fourth Wind Route 39 Fifth Wind Route 40 First inner wall 41 Second inner wall 42 Third inner wall 50 Second Diode Bridge 51 Fourth heatsink 52 Fifth IGBT 53 Sixth IGBT 54 Fifth Heatsink 55 Fourth Coil 56. Fifth Coil 57 Multiple rear capacitors 58 Sixth Wind Route

Claims

1. First heating section and The first element unit that drives the first heating section, The first heat sink arranged in the first element unit, The second heating section, A second element unit that drives the second heating section, The second heat sink arranged in the second element unit, A fan for blowing air, A wind duct unit that forms the airflow direction from the aforementioned fan, The device comprises a housing that houses the first heating unit, the first element unit, the first heat sink, the second heating unit, the second element unit, the second heat sink, and the air passage unit, and has an exhaust port at the rear of the device. The aforementioned air passage unit is A first air passage that guides the air blown from the fan, and a second air passage that intersects the first air passage and extends toward the rear, The system includes a third air passage that intersects the first air passage and extends toward the rear, and is provided spaced apart from the fan relative to the second air passage, A heating device in which the first heat sink is arranged in the second air passage and the second heat sink is arranged in the third air passage, The first heating section comprises a first coil component, and the second heating section comprises a second coil component. A heating device characterized in that the second coil component is arranged in the second air passage and is provided downstream of the first heat sink in the direction of airflow from the fan.

2. Equipped with a rectifier that rectifies AC power and converts it to DC, The aforementioned air passage unit is The system includes a fourth air passage that intersects the first air passage and extends toward the rear, and is provided spaced apart from the fan relative to the third air passage, The heating device according to claim 1, wherein the rectifier is arranged in the fourth air passage.

3. The rectifier generates less heat than the first element unit and the second element unit, respectively. The heating apparatus according to claim 2.

4. The first coil component is arranged in the second air passage, and is provided downstream of the first heat sink in the airflow direction, and downstream of the second coil component in the airflow direction. The heating device according to claim 1, wherein the first heat sink, the second coil component, and the first coil component are arranged in this order from the upstream side to the downstream side in the airflow direction of the second air passage.

5. The second air passage is provided branching off from the first air passage. The heating device according to claim 1, wherein the third air passage is provided branching off from the first air passage at a point downstream in the airflow direction from the branching point of the second air passage in the first air passage.

6. The airflow unit has a first inner wall that branches the airflow in the first airflow path and guides it to the second airflow path, and a second inner wall provided downstream of the first inner wall in the direction of airflow that branches the airflow in the first airflow path and guides it to the third airflow path. The heating device according to claim 1, wherein the distance between the second inner wall in the first air passage and the inner surface facing the front side of the air passage unit is smaller than the distance between the first inner wall in the first air passage and the inner surface facing the front side of the air passage unit.

7. First heating section and The first element unit that drives the first heating section, The first heat sink arranged in the first element unit, The second heating section, A second element unit that drives the second heating section, The second heat sink arranged in the second element unit, A fan for blowing air, A wind duct unit that forms the airflow direction from the aforementioned fan, The device comprises a housing that houses the first heating unit, the first element unit, the first heat sink, the second heating unit, the second element unit, the second heat sink, and the air passage unit, and has an exhaust port at the rear of the device. The aforementioned air passage unit is A first air passage that guides the air blown from the fan, and a second air passage that intersects the first air passage and extends toward the rear, The system includes a third air passage that intersects the first air passage and extends toward the rear, and is provided spaced apart from the fan relative to the second air passage, A heating device in which the first heat sink is arranged in the second air passage and the second heat sink is arranged in the third air passage, The first heating section comprises a first coil component, and the second heating section comprises a second coil component. The distance between the first heating element and the fan is smaller than the distance between the second heating element and the fan. The first element unit of the first heating section, the first heat sink, and the first coil component are arranged in the second air passage. A heating device in which the second element unit and the second heat sink of the second heating section are arranged in the third airflow path, and the second coil component of the second heating section is arranged in the second airflow path.

8. First heating section and The first element unit that drives the first heating section, The first heat sink arranged in the first element unit, The second heating section, A second element unit that drives the second heating section, The second heat sink arranged in the second element unit, A fan for blowing air, A wind duct unit that forms the airflow direction from the aforementioned fan, The device comprises a housing that houses the first heating unit, the first element unit, the first heat sink, the second heating unit, the second element unit, the second heat sink, and the air passage unit, and has an exhaust port at the rear of the device. The aforementioned air passage unit is A first air passage that guides the air blown from the fan, and a second air passage that intersects the first air passage and extends toward the rear, The system includes a third air passage that intersects the first air passage and extends toward the rear, and is provided spaced apart from the fan relative to the second air passage, A heating device in which the first heat sink is arranged in the second air passage and the second heat sink is arranged in the third air passage, The first heating section comprises a first coil component, and the second heating section comprises a second coil component. The enclosure is provided with a grill inside, the fan is positioned on a different side of the enclosure from the grill, and the distance between the first heating element and the grill is greater than the distance between the second heating element and the grill. The first element unit of the first heating section, the first heat sink, and the first coil component are arranged in the second air passage. A heating device in which the second element unit and the second heat sink of the second heating section are arranged in the third airflow path, and the second coil component of the second heating section is arranged in the second airflow path.

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