JP7390876B2 - induction heating cooker - Google Patents

Description

The technology of the present disclosure relates to an induction heating cooker.

Induction heating cookers generate high-frequency magnetic flux that passes through objects placed on a top plate by passing a high-frequency current through a heating coil, and use electromagnetic induction to heat objects such as frying pans and pots. Heat. In such induction heating (IH), high frequency magnetic flux passes through the object to be heated, eddy current is induced in the object to be heated, and the object to be heated is heated by Joule heat generated by its own electrical resistance.

In an induction heating cooker, when heating an object by induction heating, a heating coil generates heat due to a phenomenon called a skin effect or a proximity effect that causes energy loss. For this reason, the induction heating cooker is provided with an air blower that takes in outside air into the housing and blows the taken in air to the heating coil in order to cool the heating coil. An example of such an induction heating cooker is disclosed in Patent Document 1.

JP2019-46726A

The above-mentioned induction heating cooker is required to have a high output in order to improve the heating performance for the object to be heated. In order to increase the output of an induction heating cooker, it is necessary to increase the frequency or increase the current applied to the heating coil, which increases heat generation due to induction heating of the heating coil. Therefore, in conventional induction heating cookers, large-sized air blowers are used to enhance the cooling function of the heating coil.

In particular, in all-metal type induction heating cookers that can inductively heat even non-magnetic and low-resistance metals such as aluminum and copper, the frequency of the current applied to the heating coil is high, so the heating coil is cooled. requires a large air blower. However, when a large air blower is used, a relatively large space is required within the housing to accommodate the air blower, resulting in an increase in the height of the induction heating cooker.

The technology of the present disclosure has been made in view of this point, and its purpose is to contribute to increasing the output and reducing the height of the induction heating cooker.

In order to achieve the above object, in the technology of the present disclosure, air is blown from two directions to the heating coil using a blower device.

Specifically, the technology of the present disclosure includes a housing provided with a top plate on the top, a heating coil that induction heats an object placed on the top plate, and a heating coil that takes outside air into the housing. The present invention is directed to an induction cooking device that is equipped with a blower device that blows air to a heating coil, and in which the heating coil and the blower device are housed in a housing. In the induction heating cooker according to the technology of the present disclosure, the housing includes a first air path that supplies air blown by the blower device from the outer circumferential side toward the heating coil, and a first air path that heats the air blown by the blower device. A second air path is provided that supplies air to the coil from below.

According to this configuration, the air blower blows air toward the heating coil from two directions, so that the heating coil can be efficiently cooled. This makes it possible to apply high-frequency current that generates a relatively large amount of heat to the heating coil, and makes it possible to increase the frequency or large current of the high-frequency current applied to the heating coil, making it possible to use induction heating cookers. can achieve high output. In addition, since the heating coil can be efficiently cooled, the blower can be made smaller, so the induction heating cooker can be made lower in height.

In the induction heating cooker according to the technology of the present disclosure, the housing may be provided with an exhaust port for discharging air that has passed through the heating coil. In this case, the exhaust port is preferably located in a direction in which the blower device blows air toward the first air path.

According to this configuration, air is blown toward the exhaust port by the blower, so the air that has risen in temperature inside the housing is smoothly discharged from the exhaust port to the outside of the housing, and the heated air flows around the heating coil. can be prevented from accumulating in This is advantageous for efficiently cooling the heating coil.

The induction heating cooker according to the technology of the present disclosure may further include a partition member that vertically partitions the space inside the housing. The partition member partitions a first space forming the first air path and a second space forming the second air path. The blower device may blow air into the first space and the second space. In this case, it is preferable that the partition member is formed with a ventilation hole for passing the air blown by the ventilation device from the second space into the first space and supplying it to the heating coil from below.

According to this configuration, the air blown into the first space by the blower is supplied to the heating coil from the outer circumferential side, and the air blown into the second space is supplied to the heating coil from below through the ventilation holes of the partition member. Therefore, a configuration in which air is blown from two directions to the heating coil by the blower device can be easily realized.

It is preferable that the partition member is provided with an enclosing wall that surrounds at least the space in which the heating coil is arranged in the first space between the partition member and the top plate.

According to this configuration, the space in the first space in which the heating coil is arranged is surrounded by the enclosure wall provided on the partition member, so that the air heated by the heat generated by the heating coil inside the housing does not leak to the surroundings. This allows the heated air to be efficiently discharged from inside the housing to the outside through the exhaust port. This is advantageous in preventing heat from being trapped inside the casing and efficiently dissipating the heat of the induction heating cooker.

It is preferable that a plurality of ventilation holes in the partition member are provided so as to open toward a plurality of locations spaced apart from each other in the circumferential direction of the heating coil.

According to this configuration, the air blown into the second space by the blower is supplied to a plurality of locations spaced apart from each other in the circumferential direction of the heating coil through the plurality of ventilation holes provided in the partition member, so that the heating coil can be heated. By cooling the coil at multiple locations in the circumferential direction, the entire heating coil can be efficiently cooled.

In the induction heating cooker provided with the partition member, the blower may be arranged on one side in the horizontal direction with respect to the second space. In this case, it is preferable that the second space is provided with a dividing wall that divides the air blown by the blower into one side and the other side of an area corresponding to the heating coil in the vertical direction.

According to this configuration, the air blown into the second space by the blower is divided by the dividing wall into one side and the other side of the area corresponding to the heating coil in the vertical direction, so that a large amount of air flows through a specific ventilation hole. This allows air to be blown out evenly from multiple ventilation holes. This is advantageous for efficiently cooling the heating coil as a whole.

The induction heating cooker provided with the partition member may further include a power supply circuit that supplies power to the heating coil. The first space may be an upper space partitioned off by the partition member among the spaces within the housing, and the second space may be a space formed inside the partition member. In this case, it is preferable that the power supply circuit be disposed in a lower space partitioned by a partition member among the spaces within the casing.

According to this configuration, since the power supply circuit is isolated from the heating coil by the partition member having the second space therein, it is possible to suitably suppress the heat generation of the heating coil from adversely affecting the power supply circuit. Thereby, the reliability of the induction heating cooker can be improved.

In the induction heating cooker according to the technology of the present disclosure, it is preferable that the amount of air flowing through the second air path is larger than the amount of air flowing through the first air path.

According to this configuration, more air is blown toward the heating coil by the air blower from the lower side than from the outer circumferential side. Air blown into the heating coil from below hits a relatively wider area of the heating coil than air blown into the heating coil from the outer circumference, so it can promote heat radiation from the heating coil more effectively. . Therefore, blowing a relatively large amount of air into the heating coil from below contributes to efficiently cooling the heating coil.

In the induction heating cooker according to the technology of the present disclosure, it is preferable that the blower device includes a plurality of blowers arranged at different positions in the horizontal direction.

According to this configuration, since the plurality of blowers constituting the blower device are arranged at different positions in the horizontal direction, the total amount of air blown to the first air path and the second air path by the plurality of blowers is ensured. , individual blowers can be made smaller. This contributes to reducing the height of the induction heating cooker.

According to the technology of the present disclosure, by efficiently cooling the heating coil, it is possible to contribute to increasing the output and reducing the height of the induction heating cooker.

FIG. 1 is a perspective view of an induction heating cooker according to an embodiment. FIG. 2 is a plan view of main parts of the induction heating cooker according to the embodiment. FIG. 3 is a cross-sectional view of the induction heating cooker taken along line III-III in FIG. 2. FIG. 4 is a cross-sectional view of the induction heating cooker taken along line IV-IV in FIG. 2. FIG. 5 is a plan view of a portion of the induction heating cooker according to the embodiment in which a heating coil is mounted.

Hereinafter, exemplary embodiments will be described in detail based on the drawings. In the following embodiments, for convenience of explanation, the front side of the induction heating cooker in the direction facing the user will be referred to as the "front", and the back side will be referred to as the "rear", when viewed from the front side to the back side. The left side is called "left", the right side is called "right", the upper side in the height direction during use is called "upper", and the lower side is called "lower".

FIG. 1 shows a perspective view of an induction heating cooker 1 according to this embodiment. FIG. 2 shows a plan view of the main parts of the induction heating cooker 1. FIG. 3 shows a cross-sectional view of the induction heating cooker 1 taken along line III-III in FIG. 2. FIG. 4 shows a cross-sectional view of the induction heating cooker 1 taken along line IV-IV in FIG. 2. FIG. 5 shows a plan view of a portion of the induction heating cooker 1 in which the heating coil 13 is mounted. Note that, for convenience, in FIG. 1, the top plate 7 and the operation section 9 are shown by two-dot chain lines. Moreover, in FIG. 2, the heating coil 13 is schematically shown with a two-dot chain line and hatched.

The induction heating cooker 1 according to this embodiment is a so-called built-in type IH cooking heater that is installed by being dropped into an installation opening provided on a cooking table in a kitchen. It is configured to heat using the principle of electromagnetic induction.

As shown in FIG. 1, the induction heating cooker 1 is a two-burner type having two heating parts 3 as places for placing an object to be heated X that can be heated by induction. The two heating units 3 are provided at intervals in the left-right direction. The induction heating cooker 1 is a double all-metal type induction heating cooker, and each of the two heating parts 3 can handle not only magnetic stainless steel and iron but also non-magnetic and low resistance metals such as aluminum and copper. It is also configured to allow induction heating.

As shown in FIGS. 1 to 4, the induction heating cooker 1 includes a housing 5, a top plate 7, an operation section 9, a cabinet 11, a heating coil 13, an air blower 15, and a control board 17. Equipped with. The cabinet 11, the heating coil 13, the air blower 15, and the control board 17 have the same configuration for each heating section 3, and are all housed in the housing 5.

<Case>
The casing 5 has an outer shell corresponding to the space in which the induction heating cooker 1 is installed, and is formed in a generally rectangular box shape that is open upward. The housing 5 is mainly made of sheet metal or the like. A frame-shaped bracket 19 made of sheet metal or the like is assembled around the opening of the housing 5. A plurality of intake ports 21 are formed in the rear wall of the housing 5. A plurality of exhaust ports 23 are formed in the front wall of the housing 5. The intake port 21 and the exhaust port 23 are each slit-shaped openings extending in the vertical direction, and are spaced apart from each other in the left-right direction.

<Top board>
The top plate 7 is provided on the upper part of the housing 5 via a bracket 19, and covers the opening of the housing 5. The portions exposed from the brackets 19 at the four corners of the housing 5 and the top plate 7 are sealed with sealing material 25 made of polyurethane or the like. The top plate 7 is a generally rectangular plate made of glass or ceramic with high heat resistance, and constitutes a mounting surface on which the object to be heated X is placed. Position marks (not shown) indicating the positions of the individual heating units 3 are displayed on the mounting surface.

<Operation section>
The operating unit 9 is provided in the form of a panel at the front of the housing 5 between the bracket 19 and the top plate 7. Although not shown, the operating section 9 includes a left operating section and a right operating section. The left operation section displays the heating level of the object to be heated X placed on the left heating section 3 and receives input. The right operation section displays the heating level of the object to be heated X placed on the right heating section 3 and receives input. These left side operation section and right side operation section are configured to include, for example, a display section including a liquid crystal display element and a touch panel.

<cabinet>
The cabinets 11 are provided on the left and right sides of the front side of the housing 5, respectively. The cabinet 11 is an example of a partition member. The cabinet 11 has a partition plate section 27, an upper enclosing wall 29, and a lower enclosing wall 31. The partition plate portion 27 partitions the inside of the housing 5 in the vertical direction. As a result, the space within the housing 5 is divided into an upper space 33 located above the partition plate portion 27 and a lower space 35 located below the partition plate portion 27. The upper space 33 corresponds to the first space.

A first duct 37 is provided on the right rear side of the partition plate portion 27 and extends to the left toward the front. The rear end of the first duct 37 opens to the rear of the cabinet 11, and the front end of the first duct 37 opens to the front above the partition plate portion 27. A second duct 39 is provided at the center and rear side of the partition plate portion 27 and extends over substantially the entire area corresponding to the heating coil 13 . The second duct 39 is formed to bulge out below the partition plate portion 27 .

The rear end of the second duct 39 opens to the rear of the cabinet 11. A large-diameter first ventilation hole 41 is formed in the center of the partition plate portion 27 . The first ventilation hole 41 allows the space 40 in the second duct 39 and the upper space 33 to communicate with each other. The shape of the first ventilation hole 41 is, for example, circular. A space 40 within the second duct 39 is partitioned from the upper space 33 by the cabinet 11 (partition plate portion 27). The space 40 corresponds to a second space.

A dividing wall 43 is provided in the second duct 39 to divide the air path from the rear end opening to the first ventilation hole 41 into two. The dividing wall 43 includes a separation wall 45 , a detour wall 47 , and a lead-out wall 49 .

The separation wall 45 extends forward from the rear end opening of the second duct 39 toward the first ventilation hole 41 . The dividing wall 43 divides the air blown into the interior from the rear end opening of the second duct 39 into a right side and a left side. The detour wall 47 extends in an arc shape that surrounds a portion of the first ventilation hole 41 excluding a portion on the front side when viewed from above. The detour wall 47 is connected to the separation wall 45 and guides the air separated by the separation wall 45 to bypass the first ventilation hole 41 and flow forward.

The lead-out wall 49 extends from the outer peripheral wall of the second duct 39 in front of the first ventilation hole 41 to a position corresponding to the inside of the first ventilation hole 41, passing between the front open ends of the detour wall 47. The outlet wall 49 guides the air that has bypassed the first ventilation hole 41 by the detour wall 47 so that it flows into the first ventilation hole 41 in a divided state. The space 40 in the second duct 39 is divided by a dividing wall 43 into a left side air passage 51 that bypasses the left side of the first ventilation hole 41 and a right side air passage 53 that bypasses the right side of the first ventilation hole 41. It is configured.

A plurality of second ventilation holes 55 are formed in a portion of the partition plate portion 27 around the first ventilation hole 41 that corresponds to the left air passage 51 and the right air passage 53, that is, on the upper wall of the second duct 39. ing. The plurality of second ventilation holes 55 are provided around the first ventilation hole 41 at intervals from each other in the circumferential direction, and are arranged radially around the first ventilation hole 41 . Like the first ventilation hole 41, the second ventilation hole 55 is a hole that allows the space 40 (the left air passage 51 or the right air passage 53) in the second duct 39 to communicate with the upper space 33. The shape of the second ventilation hole 55 is, for example, a circular shape with a smaller diameter than the first ventilation hole 41.

A third duct 57 extending in the front-rear direction is provided on the right side of the partition plate portion 27. The third duct 57 bulges below the partition plate 27 from a position overlapping the first duct 37 to a position near the rear end of the partition plate 27 via the right side of the second duct 39 when viewed from above. It is formed in a manner. The rear end of the third duct 57 is located below the rear end opening of the first duct 37 and opens to the rear of the cabinet 11. A plurality of third ventilation holes 59 are formed in the lower wall of the front part of the third duct 57. The third ventilation hole 59 is a hole that allows communication between the inside of the third duct 57 and the lower space 35. The shape of the third ventilation hole 59 is, for example, a slit shape extending in the left-right direction.

The upper enclosing wall 29 is formed integrally with the partition plate portion 27. The upper enclosing wall 29 is provided on the outer peripheral edge of the partition plate part 27 and extends upward from the partition plate part 27. The upper enclosing wall 29 surrounds the upper space 33 on three sides, the right and left sides and the rear side, between it and the top plate 7, and opens the upper space 33 to the front where the exhaust port 23 is located. An upper ventilation opening 61 that opens rearward is formed in the lower part of the rear wall that constitutes the upper enclosing wall 29 . This upper ventilation port 61 is located above the rear end opening of the second duct 39.

The lower enclosing wall 31 is formed integrally with the partition plate portion 27. The lower enclosing wall 31 is provided at the outer peripheral edge of the partition plate portion 27 and extends downward from the partition plate portion 27 . The lower enclosing wall 31 surrounds the lower space 35 on three sides, right and left sides, and the rear side, and opens the lower space 35 to the front where the exhaust port 23 is located. A lower ventilation opening 63 that opens rearward is formed on the right side of the rear wall that constitutes the lower enclosing wall 31 . This lower ventilation port 63 is located below the rear end opening of the third duct 57.

<Heating coil>
As shown in FIG. 5, the heating coil 13 is supported by a coil base 65 on the partition plate portion 27 of the cabinet 11, and is disposed in the upper space 33. The coil base 65 is generally formed into a disk shape. Ferrite is embedded in the coil base 65 in a substantially radial manner. The heating coil 13 is a flat double coil that inductively heats the object to be heated X placed on the top plate 7, and includes an inner coil 67 and an outer coil 69 provided on the same concentric plane. It is configured. The inner coil 67 is disposed inside the outer coil 69 and is electrically connected to the outer coil 69.

The inner coil 67 and the outer coil 69 are each constructed by winding a coil wire 71 such as a litz wire or a flat wire in a plurality of turns. In the inner coil 67 and the outer coil 69, a gap 73 through which air can flow is provided between adjacent coil wires 71. The inner coil 67 is arranged above the first ventilation hole 41 of the cabinet 11. A plurality of second ventilation holes 55 provided in the cabinet 11 open at a plurality of locations spaced apart from each other in the circumferential direction of the outer coil 69 . The gap 73 between the coil wires 71 in the outer coil 69 and the second ventilation hole 55 have a corresponding positional relationship.

A sensor stand 75 is provided at the center of the coil base 65. A temperature sensor 77 is attached to the sensor stand 75. As the temperature sensor 77, for example, a contact type temperature sensor such as a thermistor is used. The temperature sensor 77 is provided in close contact with the lower surface of the top plate 7 and detects the temperature of the object to be heated X placed on the heating section 3 through the top plate 7 . Note that the temperature sensor 77 may be a non-contact temperature sensor such as an infrared sensor. The detected value of the temperature sensor 77 is sent to the control board 17.

<Blower device>
The blower device 15 takes external air into the housing 5 from the intake port 21 and causes the air to flow from the intake port 21 inside the housing 5 through the heating coil 13 and the control board 17 toward the exhaust port 23. The air inside the housing 5 is discharged to the outside from the exhaust port 23. The blower device 15 includes a first blower 79 and a second blower 81. The first blower 79 and the second blower 81 are arranged at different positions in the horizontal direction.

The first blower 79 is arranged behind the central portion of the cabinet 11 in the left-right direction. The first blower 79 includes a casing 83 and an electric fan 85 housed in the casing 83. For the first blower 79, for example, a centrifugal blower having a blower fan (also called a sirocco fan) as the electric fan 85 is used. The first blower 79 is provided with the rotation axis of the electric fan 85 directed in the vertical direction. The first blower 79 takes in air from an intake port 87 provided at the lower part of the casing 83 by rotating the electric fan 85, and blows the air out from an air outlet 89 directed toward the front of the casing 83.

The first blower 79 is housed in a case 91. An opening 93 is formed in the lower surface of the case 91 to expose the air intake port 87 of the first blower 79 . A blowout air path 95 is formed in the front portion of the case 91 to allow air blown from the first blower 79 to flow therethrough. The front end of the blowout air passage 95 is open toward the front of the case 91. The front end opening of the blowout air passage 95 is connected to the rear end opening of the second duct 39 and the upper ventilation port 61 by directing the front end of the case 91 to the rear wall of the cabinet 11. The exhaust port 23 is located in the direction in which the first blower 79 blows air from the upper ventilation port 61 to the upper space 33 through the air outlet path 95 .

The second blower 81 is arranged on the right side of the first blower 79 at the rear of the cabinet 11. The second blower 81 has a casing 97 and an electric fan 99 housed in the casing 97. For the second blower 81, for example, an axial blower having a propeller fan as an electric fan 99 is used. The second blower 81 is provided with the rotation axis of the electric fan 99 directed in the front-rear direction. The second blower 81 takes in air from an intake port 101 provided at the rear of the casing 97 and sends out air from an air outlet 103 provided at the front of the casing 97 by rotating the electric fan 99 .

A block-shaped air passage member 105 is provided between the second blower 81 and the rear wall of the cabinet 11. The air passage member 105 is provided with a communication air passage 107 opened in the aforementioned direction. A rear end opening of the connecting air passage 107 is connected to the outlet 103 of the second blower 81 . The front end opening of the communication air passage 107 is formed by directing the front end of the air passage member 105 to the rear wall of the cabinet 11, so that the front end opening of the first duct 37, the rear end opening of the third duct 57, and the lower side It is connected to the ventilation port 63. The exhaust port 23 is in the direction in which the second blower 81 blows air from the first duct 37 to the upper space 33 through this communication air passage 107 and in the direction in which the air is blown into the upper space 33 from the lower ventilation port 63. positioned.

<Control board>
The control board 17 controls the heating operation of the heating coil 13 and the blowing operation of the first blower 79 and the second blower 81. The control board 17 includes a first circuit board 109 and a second circuit board 111.

The first circuit board 109 is arranged in the lower space 35 below the cabinet 11. On the first circuit board 109, an inverter circuit 113 as a power supply circuit, other electronic components, a heat sink 115, and the like are mounted. The first circuit board 109 applies a high frequency current of about 20 kHz to 100 kHz to the heating coil 13. The magnitude of the high-frequency current applied to the heating coil 13 is controlled by the first circuit board 109 based on the detection value of the temperature sensor 77, etc., in accordance with the heating level set by the user on the operation unit 9.

The second circuit board 111 is arranged at the rear of the cabinet 11. Electronic components 116 such as a switching mode power supply are mounted on the second circuit board 111. The second circuit board 111 supplies power to the first blower 79 and the second blower 81 to drive the first blower 79 and the second blower 81. The amount of air blown by the blower 15, that is, the fan rotation speed of the first blower 79 and the fan rotation speed of the second blower 81, are each controlled by the second circuit board 111.

<Air path inside the housing>
Inside the housing 5, a first air path 117 and a second air path 119 are provided as air paths through which air for cooling the heating coil 13 flows when driven by the air blower 15.

The first air path 117 is an air path that supplies air blown by the air blower 15 toward the heating coil 13 from the outer circumferential side. The first air passage 117 has a center air passage 121 and a side air passage 123.

The center air passage 121 is configured by the air outlet 95 of the case 91 that houses the first blower 79, the upper ventilation opening 61 of the cabinet 11, and the upper space 33 above the partition plate part 27 in the housing 5. There is. The center air passage 121 supplies air blown by the first blower 79 to the heating coil 13 from directly behind.

The side air passage 123 is constituted by the communication air passage 107 of the air passage member 105, the space within the first duct 37 of the cabinet 11, and the upper space 33 above the partition plate portion 27 within the housing 5. The side air passage 123 supplies air blown by the second blower 81 to the heating coil 13 from the rear right side.

The second air path 119 is an air path that supplies air blown by the first blower 79 toward the heating coil 13 from below. The second air passage 119 includes a blowing air passage 95 of the case 91 that houses the first blower 79, a left air passage 51 and a right air passage 53 in the second duct 39 of the cabinet 11, and a first air passage of the partition plate section 27. It is configured by a ventilation hole 41 and a plurality of second ventilation holes 55.

A third air path 125 and a fourth air path 127 are further provided in the housing 5 as air paths through which air for cooling the first circuit board 109 flows.

The third air path 125 is an air path that supplies air blown by the second blower 81 toward the first circuit board 109 from the outer peripheral side. The third air passage 125 is constituted by the communication air passage 107 of the air passage member 105, the lower ventilation opening 63 of the cabinet 11, and the lower space 35 below the partition plate portion 27 in the housing 5.

The fourth air path 127 is an air path that supplies air blown by the second blower 81 toward the first circuit board 109 from above. The fourth air passage 127 is constituted by the communication air passage 107 of the air passage member 105, the space inside the third duct 57 of the cabinet 11, and a plurality of third ventilation holes 59 in the front part of the third duct 57. ing.

In the induction heating cooker 1 having the above configuration, when the first blower 79 and the second blower 81 are driven, external air is taken into the housing 5 from the intake port 21, and the air taken into the housing 5 is After passing through the second circuit board 111, the air is blown into the center air passage 121 and the second air passage 119 by the first air blower 79, and the side air passage 123, the third air passage 125, and the second air passage 119 are blown by the second air blower 81. The air is blown to the fourth air passage 127.

At this time, the amount of air flowing through the second air path 119 is larger than the amount of air flowing through the first air path 117. Here, the amount of air flowing through the first air path 117 is the average value of the amount of air flowing through the center air path 121 and the amount of air flowing through the side air paths 123. The amount of air flowing through the first air path 117 may be either the amount of air flowing through the center air path 121 or the amount of air flowing through the side air paths 123 (for example, the larger amount of air). Further, the amount of air flowing through the second air passage 119 is the amount of air passing through the rear end opening of the second duct 39. The amount of air flowing through the second air path 119 may be either the amount of air flowing through the left air path 51 or the amount of air flowing through the right air path 53, or the amount of air flowing through both air paths 51, 53. may be the average value.

The air blown into the center air passage 121 by the first blower 79 is supplied to the heating coil 13 from the rear side, passes through the heating coil 13, heads toward the exhaust port 23, and exits from the exhaust port 23 to the outside of the casing 5. be discharged. The air blown into the second air passage 119 by the first blower 79 is supplied to the heating coil 13 by being blown out from the first air hole 41 and the second air hole 55 on the lower side, and The air passes through the heating coil 13 while merging with the air blown into the center air passage 121 and the side air passages 123), heads toward the exhaust port 23, and is discharged from the exhaust port 23 to the outside of the housing 5.

The air blown into the side air passage 123 by the second blower 81 is supplied to the heating coil 13 from the right rear side, passes through the heating coil 13 and is exhausted while merging with the air supplied from the center air passage 121. It heads toward the port 23 and is discharged from the casing 5 through the exhaust port 23 . The air blown into the third air path 125 by the second blower 81 is supplied to the first circuit board 109 from the rear, passes through the first circuit board 109, heads toward the exhaust port 23, and is sent from the exhaust port 23 to the casing. 5 It is discharged outside. The air blown into the fourth air path 127 by the second blower 81 is supplied to the front part of the first circuit board 109 from above, and joins with the air blown into the third air path 125 until it reaches the exhaust port 23. and is discharged from the housing 5 through the exhaust port 23.

In this way, the air flow generated within the housing 5 by driving the first blower 79 and the second blower 81 cools the heating coil 13, the first circuit board 109, and the second circuit board 111. The second circuit board 111 is exposed to air flowing from the air intake port 21 toward the first blower 79 and the second blower 81 and is cooled. The first circuit board 109 is cooled by being exposed to air supplied from the rear side through the third air passage 125 and air supplied from the upper side through the fourth air passage 127 . The heating coil 13 is cooled by being exposed to air supplied from the rear side through the first air passage 117 and air supplied from the lower side through the second air passage 119 .

-Effects of embodiment-
According to the induction heating cooker 1 according to this embodiment, the first blower 79 and the second blower 81 blow air into the heating coil 13 from two directions: from the rear side and from the bottom, so that the heating coil 13 can be efficiently cooled. This makes it possible to apply a high-frequency current that generates a relatively large amount of heat to the heating coil 13, and makes it possible to increase the frequency or large current of the high-frequency current applied to the heating coil 13, so induction heating The cooking device 1 can be made to have high output. Moreover, since the heating coil 13 can be efficiently cooled, the first blower 79 and the second blower 81 can be made smaller, so that the induction heating cooking device 1 can be made lower in height.

According to the induction heating cooker 1 according to this embodiment, the exhaust port 23 is configured such that the first blower 79 blows air toward the center air path 121 and the second blower 81 blows air toward the side air path 123. Since the air is blown toward the exhaust port 23 by the first blower 79 and the second blower 81, the air that has risen in temperature inside the casing 5 flows from the exhaust port 23 to the casing 5. Air that is smoothly discharged to the outside and has a raised temperature can be prevented from staying around the heating coil 13. This is advantageous for efficiently cooling the heating coil 13.

According to the induction heating cooker 1 according to this embodiment, the upper space 33 in which the heating coil 13 is disposed is surrounded by the upper enclosing wall 29 of the cabinet 11. Leakage of the heated air to the surroundings is suppressed, and the heated air can be efficiently discharged from the inside of the casing 5 to the outside through the exhaust port 23. This is advantageous in preventing heat from being trapped inside the casing 5 and allowing the heat of the induction heating cooker 1 to escape efficiently.

According to the induction heating cooker 1 according to this embodiment, the lower space 35 in which the first circuit board 109 is arranged is surrounded by the lower enclosing wall 31 of the cabinet 11. Air heated by the heat generated by the board 109 is prevented from leaking to the surroundings, and the heated air can be efficiently discharged from the inside of the casing 5 to the outside through the exhaust port 23. This is also advantageous for efficiently dissipating the heat of the induction heating cooker 1.

According to the induction heating cooker 1 according to this embodiment, the air blown into the second duct 39 by the first blower 79 is transferred to the first ventilation hole 41 provided in the partition plate portion 27 and each second ventilation hole 55. Since the heating coil 13 is supplied to a plurality of locations spaced apart from each other in the circumferential direction of the heating coil 13 through the heating coil 13, the heating coil 13 can be cooled at a plurality of locations in the circumferential direction, and the heating coil 13 can be efficiently cooled as a whole.

According to the induction heating cooker 1 according to this embodiment, the air blown into the second duct 39 by the first blower 79 is divided into the left air passage 51 and the right air passage 53 by the dividing wall 43. It is possible to suppress a large amount of air from flowing through the ventilation holes 41 and a specific second ventilation hole 55, and to evenly blow out air from the plurality of first ventilation holes 41 and each of the second ventilation holes 55. This is advantageous for efficiently cooling the heating coil 13 as a whole.

According to the induction heating cooker 1 according to this embodiment, the first circuit board 109 is heated by the cabinet 11 having the second air passage 119 (the left air passage 51 and the right air passage 53) and the third air passage 125 therein. 13, it is possible to suitably suppress the heat generated by the heating coil 13 from adversely affecting the inverter circuit 113 and the like. Thereby, the reliability of the induction heating cooker 1 can be improved.

According to the induction heating cooker 1 according to this embodiment, more air is blown toward the heating coil 13 from the lower side than from the outer circumferential side by the blower device 15. The air blown into the heating coil 13 from below hits a relatively wider area of the heating coil 13 than the air blown into the heating coil 13 from the outer circumferential side, so the heat radiation of the heating coil 13 is made more effective. can be encouraged. Therefore, blowing a relatively large amount of air toward the heating coil 13 from below contributes to efficiently cooling the heating coil 13.

According to the induction heating cooker 1 according to this embodiment, the blower device 15 has the first blower 79 and the second blower 81, and the first blower 79 and the second blower 81 are arranged at different positions in the horizontal direction. Therefore, the first blower and the second blower can be downsized while ensuring the total amount of air blown into the first air path 117 and the second air path 119 by the first blower 79 and the second blower 81. This contributes to reducing the height of the induction heating cooker 1.

As mentioned above, preferred embodiments have been described as illustrations of the technology of the present disclosure. However, the technology of the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. Additionally, some of the components described in the accompanying drawings and detailed description may not be essential for solving the problem. Therefore, just because these non-essential components are described in the accompanying drawings or detailed description, it should not be immediately determined that those non-essential components are essential.

For example, the above embodiment may have the following configuration.

In the above embodiment, the intake port 21 is formed in the rear wall of the housing 5, the exhaust port 23 is formed in the front wall of the housing 5, and the air blower 15 is inserted into the housing 5 from the intake port 21 on the rear side to the front side. Although the air flow is caused to flow toward the exhaust port 23, the present invention is not limited thereto. For example, the intake port 21 and the exhaust port 23 may be formed separately on the left and right sides of the rear wall of the housing 5. In this case, it is sufficient that the air blower 15 passes from the intake port 21 to the heating coil 13 and the control board 17 and then makes a U-turn to generate a flow of air toward the exhaust port 23.

Although in the embodiment described above, the amount of air flowing through the second air path 119 is greater than the amount of air flowing through the first air path 117, the present invention is not limited to this. The amount of air flowing through the second air path 119 and the amount of air flowing through the first air path 117 may be approximately the same. The amount of air flowing through the second air path 119 may be smaller than the amount of air flowing through the first air path 117.

In the above embodiment, the induction cooking device 1 has an air path in the housing 5 through which air is blown toward the heating coil 13 from the rear side and the bottom side by the air blower 15, but the invention is not limited to this. do not have. For example, the air path in the housing 5 through which the air blower 15 blows air may be configured to blow air toward the heating coil 13 from one side of the left and right sides and from the bottom. In short, there is an air path in the housing 5 that supplies the air blown by the blower 15 toward the heating coil 13 from the outer circumferential side, and an air path that supplies the air blown by the blower 15 toward the heating coil 13 from the bottom side. It suffices if an air passage is provided for supplying air from the air.

In the above embodiment, the blower device 15 includes the first blower 79 and the second blower 81, but the blower device 15 is not limited to this, and may be configured with only one blower, It may have three or more blowers.

In the above embodiment, the first blower 79 blows air to the first air path 117 and the second air path 119, and the second blower 81 blows air to the first air path 117, the third air path 125, and the fourth air path 127. Although it is assumed that air is blown out, the present invention is not limited to this. For example, the first blower 79 blows air only to the first air path 117, the second blower 81 blows air only to the second air path 119, and the third air path 125 and fourth air path 127 are separately provided. A third blower (third blower) may blow the air.

In the above embodiment, a centrifugal blower is illustrated as the first blower 79, and an axial blower is illustrated as the second blower 81, but the present invention is not limited thereto. As the first blower 79, an axial blower, a mixed flow blower, or a cross flow blower may be used. Further, as the second blower 81, a centrifugal blower, a mixed flow blower, or a cross flow blower may be used.

In the above embodiment, the case where the induction heating cooker 1 is a double-all-metal compatible type is exemplified, but the invention is not limited to this. For example, the induction heating cooker 1 may be a single all-metal compatible type in which only one of the two heating parts 3 is an all-metal compatible type, and both of the two heating parts 3 may be magnetic. It may also be a type exclusively for magnetic materials such as stainless steel or iron. Further, the induction heating cooker 1 may have one heating section 3, or may have three or more heating sections 3.

In the above embodiment, the induction heating cooker 1 is of a built-in type, but the invention is not limited to this. The built-in induction heating cooker 1 is just one example, and the technology of the present disclosure is also applicable to a stationary induction heating cooker placed on a cooking table in a kitchen.

As explained above, the technology of the present disclosure is useful for an induction heating cooker that cools a heating coil by blowing air.

X Object to be heated 1 Induction heating cooker 3 Heating section 5 Housing 7 Top plate 9 Operation section 11 Cabinet 13 Heating coil 15 Air blower 17 Control board 19 Bracket 21 Intake port 23 Exhaust port 25 Seal material 27 Partition plate section 29 Upper enclosure Wall 31 Lower enclosing wall 33 Upper space (first space)
35 Lower space 37 First duct 39 Second duct 40 Space inside the second duct (second space)
41 First ventilation hole 43 Dividing wall 45 Separation wall 47 Detour wall 49 Derivation wall 51 Left air passage 53 Right air passage 55 Second ventilation hole 57 Third duct 59 Third ventilation hole 61 Upper ventilation opening 63 Lower ventilation opening 65 Coil Base 67 Inner coil 69 Outer coil 71 Coil wire 73 Gap 75 Sensor stand 77 Temperature sensor 79 First blower 81 Second blower 83 Casing 85 Electric fan 87 Inlet 89 Outlet 91 Case 93 Opening 95 Air outlet 97 Casing 99 Electric Fan 101 Inlet 103 Air outlet 105 Air path member 107 Connecting air path 109 First circuit board 111 Second circuit board 113 Inverter circuit (power supply circuit)
115 Heat sink 116 Electronic component 117 First air path 119 Second air path 121 Center air path 123 Side air path 125 Third air path 127 Fourth air path

Claims (7)

A housing with a top plate provided on the top;
a heating coil that inductively heats an object placed on the top plate;
an air blower that takes in external air into the housing and blows it to the heating coil,
An induction heating cooker in which the heating coil and the blower are housed in the housing,
The housing includes a first air path that supplies air blown by the air blower toward the heating coil from the outer circumferential side, and a first air path that supplies air blown by the air blower toward the heating coil from the bottom side. A second air path is provided to supply the
further comprising a partition member that vertically partitions the space inside the housing,
The partition member partitions a first space forming the first air path and a second space forming the second air path,
The blower blows air into the first space and the second space,
The partition member is formed with a ventilation hole for passing the air blown by the blower from the second space into the first space and supplying it from below toward the heating coil,
The blower device is arranged on one side in the horizontal direction with respect to the second space,
The second space is provided with a dividing wall that divides the air blown by the blower into one side and the other side of an area corresponding to the heating coil in the vertical direction.
An induction heating cooker characterized by: A housing with a top plate provided on the top;
a heating coil that inductively heats an object placed on the top plate;
an air blower that takes in external air into the housing and blows it to the heating coil,
An induction heating cooker in which the heating coil and the blower are housed in the housing,
The housing includes a first air path that supplies air blown by the air blower toward the heating coil from the outer circumferential side, and a first air path that supplies air blown by the air blower toward the heating coil from the bottom side. A second air path is provided to supply the
further comprising a partition member that vertically partitions the space inside the housing,
The partition member partitions a first space forming the first air path and a second space forming the second air path,
The blower blows air into the first space and the second space,
The partition member is formed with a ventilation hole for passing the air blown by the blower from the second space into the first space and supplying it from below toward the heating coil,
further comprising a power supply circuit that supplies power to the heating coil,
The first space is an upper space partitioned by the partition member among the spaces within the housing,
The second space is a space formed inside the partition member,
The induction heating cooker is characterized in that the power supply circuit is disposed in a lower space partitioned by the partition member out of the space within the housing. In the induction heating cooker according to claim 1 or 2 ,
The housing is provided with an exhaust port for discharging the air that has passed through the heating coil,
The induction heating cooking device is characterized in that the exhaust port is located in a direction in which the air blower blows air toward the first air path. In the induction heating cooker according to any one of claims 1 to 3 ,
The induction heating cooking device is characterized in that the partition member is provided with an enclosing wall that surrounds at least a space in the first space in which the heating coil is arranged between the partition member and the top plate. In the induction heating cooker according to any one of claims 1 to 4 ,
The induction heating cooking device is characterized in that a plurality of the ventilation holes are provided so as to open toward a plurality of locations spaced apart from each other in the circumferential direction of the heating coil. In the induction heating cooker according to any one of claims 1 to 5 ,
An induction heating cooking device characterized in that the amount of air flowing through the second air path is larger than the amount of air flowing through the first air path. In the induction heating cooker according to any one of claims 1 to 6 ,
The induction heating cooking device is characterized in that the blower device includes a plurality of blowers arranged at different positions in the horizontal direction.

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