JP4922261B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  An induction heating cooker induces an overcurrent with a high-frequency magnetic flux generated by flowing a high-frequency current through an induction heating coil, and heats an object to be heated with Joule heat generated thereby.

  In recent years, the object to be heated has been diversified, and there are not only iron pans but also non-magnetic stainless steel pans, copper pans, aluminum pans, and the like. Accordingly, the induction heating cooker is required to have a high output in order to realize cooking based on the type of the object to be heated.

As the output increases, the electronic circuit components that drive the induction heating coil and the heating of the induction heating coil increase, and the manufacturing cost tends to increase.
Therefore, various induction heating cookers that efficiently cool and reduce the cost have been proposed.

  In relation to the above-mentioned problems, “the loss of cooling air is suppressed, the cooling efficiency of the heating coil and the output control board is improved, and the assembling property is also improved to reduce the cost. As a technique for the purpose, “the insulating plate 2 for placing the object to be heated is provided on the upper surface of the main body 1, and a plurality of heating coils 9, 10, an output control board 11, In an induction heating cooker provided with a cooling fan 12 for cooling these and a board case 13 for fixing the output control board 11, the board case 13 has an integrated air path from the outside air suction part to the discharge part. Then, the output control board 11 and the cooling fan 13 are arranged in the air path of the board case 13 so as to suppress the loss of the cooling air and improve the cooling efficiency of the heating coils 9 and 10 and the output control board 11. Configured. Is proposed (Patent Document 1).

JP 2006-173140 A (summary)

  In the technique described in Patent Document 1, since the cooling fan is arranged in the substrate case, (1) a part of the cooling air sent out by the blower in the substrate case is again sucked into the cooling fan and circulated (2 ) Cooling air does not reach the electronic parts or induction heating coil that is the object to be cooled, (3) Cooling air volume because the cooling efficiency decreases due to high temperature cooling air after substrate cooling is blown to the induction heating coil, etc. Increases the load of the cooling fan and increases the fan (cooling fan) noise, and because the cooling fan is placed in the board case, the size of the cooling fan cannot be used due to size restrictions, and the fan noise Increasing issues, board case and cooling fan case are doubled, space efficiency and mounting density are reduced, and cost is high, and board case is used for cooling fan maintenance. Decomposition there is such problem that the higher the maintenance costs required of.

  The present invention has been made in order to solve the above-described problems. The cooling loss is suppressed, the cooling efficiency of the induction heating coil and the electronic component is improved, the operation noise is reduced, and the cost is reduced by the simple structure. The purpose is to reduce.

An induction heating cooker according to the present invention includes an electronic circuit board on which a top plate on which an object to be heated is placed, a heating coil disposed below the top plate, and an electronic circuit that supplies current to the heating coil are mounted. An air blower that blows cooling air, a substrate case that houses the electronic circuit board, and an air chamber that is disposed under the heating coil and has an air outlet on the upper surface. And a diverter provided between the blower outlet of the blower and the object to be cooled on the electronic circuit board, and diverting the cooling air, and the blower includes a sirocco fan, a radial fan, and a turbo One of the impellers of the fan, a blower inlet, a blower casing, a blower outlet, and a driving means support, and a bell mouth shape of the blower inlet, and the blower case At least one of the scroll shape of the ring is formed so the substrate case and integrally, wherein the substrate case has a plurality of the exhaust ports, the air chamber are respectively connected to a plurality of the exhaust ports in the wind path The cooling air from the plurality of exhaust ports is mixed and blown out from the air outlet, and the diverting means sends the cooling air to the plurality of exhaust ports without passing through the object to be cooled on the electronic circuit board. Among them, the flow is divided into a flow leading to some of the exhaust ports and a flow leading to other exhaust ports via the object to be cooled on the electronic circuit board .

According to the induction heating cooker according to the present invention, since at least a part of the blower is integrally formed with the substrate case, the blower can be assembled simultaneously with the assembly of the substrate case.
As a result, the assemblability is improved, and further, the substrate case and the blower outer shell are integrated to reduce the material and reduce the manufacturing cost.
Further, the cooling air sent from the blower is not circulated in the substrate case, and the cooling efficiency is improved.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing the entire induction heating cooker according to Embodiment 1 of the present invention.
In FIG. 1, the housing | casing upper surface 3 is arrange | positioned freely on the housing | casing 2 upper side of the main body 1 of an induction heating cooking appliance.
A grill 5 is arranged on the back side of the upper surface 3 of the housing, a top plate 4 is arranged in the center, and an operation unit 6 is provided on the front side.
An object to be heated (not shown) is placed on the top plate 4.
The grill 5 is air permeable, and the air flow of intake and exhaust passes smoothly.
A cooking unit 7 is disposed at the front center of the main body 1, and an operation unit 6 is provided on the left and right sides of the front surface.

FIG. 2 is a perspective view of the main body 1 with the top plate 4 and the grill 5 removed.
A housing exhaust port 9 is provided in the center of the rear surface side of the housing upper surface 3, and a housing air intake port 8 is provided on the left and right sides, and is covered with a grill 5 in a normal use state.
Induction heating coils 11 are arranged on the front left and right sides of the lower side from which the top plate 4 is removed, and a radiant heater 13 is arranged in the center of the back side. A chamber 12 is disposed below the induction heating coil 11.
The chamber 12 is an air chamber that supplies cooling air to the lower surface of the induction heating coil 11.

  In the first embodiment, the radiant heater 13 is arranged at the center on the back side, but the induction heating coil 11 may be arranged. Further, the position and the number of the induction heating coils 11 are not limited to this, and may be one or more.

A cooking unit 7 is disposed at the lower center of the chamber 12 and the radiant heater 13, and a substrate case 14 is disposed on the left and right side surfaces.
The cooking unit 7 is configured up to the center of the front surface of the main body 1 and performs cooking such as baking, steaming and frying, steam cooking, and the like in the space inside the cooking unit 7. During the cooking operation of the cooking unit 7, heat is generated and becomes a heat source in the main body 1.
The substrate case 14 is connected to the housing inlet 8 by the intake air passage 10.

  In the first embodiment, the cooking unit 7 is arranged at the center of the main body 1 and the substrate cases 14 are arranged on both sides thereof, but the number and arrangement of the cooking units 7 and the substrate cases 14 are not limited to this. For example, the cooking unit 7 may be disposed on either the left or right side surface of the main body 1 and one substrate case 14 may be disposed on the opposite side surface, or more substrate cases may be used as necessary. .

FIG. 3 is a top view of the main body 1 with the housing top surface 3, the top plate 4, the grille 5, and the right induction heating coil 11 removed.
A blower outlet 15 is provided on the upper surface of the chamber 12 disposed below the induction heating coil 11. Cooling air delivered from the blowout port 15 contacts the bottom surface of the induction heating coil 11 to cool the induction heating coil 11.
The chamber 12 is provided with two openings, an A chamber inlet 16 and a B chamber inlet 17 from the end surface to the bottom surface, which are respectively connected to an A exhaust port 23 and a B exhaust port 24 described later provided in the substrate case 14. It is ventilated.

  FIG. 4 is a perspective view showing a state in which the right substrate case 14, the air inlet cover 18, and the chamber 12 are assembled. Since the left and right configurations of the induction heating cooker are symmetrical and substantially equivalent, the following description will be made using the right side.

The substrate case 14 is composed of three components, a case A component 19, a case B component 20, and a case C component 21, from the side surface side. The intake air passage 10 is formed by an intake cover 18 and a case C component 21.
The air passage from the intake air passage 10 through the substrate case 14 to the chamber 12 at the A chamber inlet 16 and the B chamber inlet 17 to the outlet 15 is almost sealed. Almost all of the air that has flowed into the intake air passage 10 is blown out from the air outlet 15 to form an integral air passage.

FIG. 5 is a perspective view of the substrate case 14 in an assembled state.
The substrate case 14 is provided with a substrate case intake port 22, an A exhaust port 23, and a B exhaust port 24, and internally forms an air path from the substrate case intake port 22 to each exhaust port.
The A exhaust port 23 is connected to the A chamber inlet 16, and the B exhaust port 24 is connected to the B chamber inlet 17.

FIG. 6 is an exploded perspective view of the substrate case 14.
An electronic circuit board 25 is fixed to the case A component 19. The board surface of the electronic circuit board 25 is fixed vertically to the outer peripheral side of the housing 2 of the board case 14. Cooling air flows between the board surface of the electronic circuit board 25 and the case B component 20.
Electronic components such as the A object to be cooled 26 and the B object to be cooled 27 are mounted on the electronic circuit board 25. Of the wall surface of the case A component 19, the vicinity of where the A object to be cooled 26 and the B object to be cooled 27 are arranged is provided with a case convex portion 28 and has a convex shape inside. The reason for this will be described later.

  On the upper surface of the case B component 20, openings of the A exhaust port 23 and the B exhaust port 24 are provided. A scroll-shaped blower casing 29 is formed on a part of the wall surface from the upper surface to the rear surface. Further, an opening of the blower outlet 30 is formed at the center of the case B component 20.

The board case intake port 22 provided in the case C component 21 also functions as a blower intake port. A bell mouth shape is formed on the outer periphery of the substrate case inlet 22.
Further, the case C component 21 is provided with a drive means support portion 31 for the blower, and the drive means 32 is supported. A sirocco fan 33 is fixed to the rotating shaft of the driving means 32.
The drive means 32 is comprised with a motor, for example.

  By assembling the substrate case 14, the driving means 32 that is a component of the blower, the substrate case intake port 22 that is the blower suction port, the sirocco fan 33, the blower casing 29, and the blower blower outlet 30 are integrated with the substrate case 14. Formed.

  FIG. 7 is a perspective view of the case B component 20. It is a perspective view from the inside of the substrate case 14 opposite to FIG. A shunt plate 34 and a wind guide plate 35 are integrally formed inside the case B component 20.

FIG. 8 is a top cross-sectional view of the state in which the air inlet cover 18 and the substrate case 14 are assembled.
An intake chamber 36 connected to the intake air passage 10 is provided in front of the substrate case intake port 22 by the intake port cover 18 and the substrate case 14.
The electronic circuit board 25 is disposed partially in parallel with the sirocco fan 33, the board case inlet 22, the blower outlet 30, and the like, which are components of the blower, and provides a lot of space between the front and back of the board case 14. The space of the electronic circuit board 25 is secured.

  The electronic component and the heat dissipating member mounted on the electronic circuit board 25 are arranged with parts that are relatively little protruded from the electronic circuit board 25 and need not be cooled in a portion parallel to the blower portion. In the front side, there is a need for cooling such as the A object to be cooled 26 and the B object to be cooled 27, or components with large protrusions from the electronic circuit board 25 are mounted.

  Of the wall surface of the case B component 20, a case convex portion 28 having a convex shape on the inner side of the case is provided at a portion where the A cooled object 26 and the B cooled object 27 are arranged. The reason for this will be described later.

FIG. 9 is a side sectional view of the periphery of the substrate case 14.
A bottom elevation portion 37 is provided on the bottom surface of the housing 2 for the purpose of ensuring workability and the like, and the interval in the height direction of the housing 2 is narrowed. In such a part, parts and the like are difficult to arrange, and often becomes a dead space.
In the first embodiment, by arranging the blower casing 29 formed integrally with the substrate case 14 in this portion, the space can be used effectively and more components / functions can be mounted. .

  The blower outlet 30 is provided with a shape in which a blower casing 29 integrally formed with the case B component 20 and an air guide plate 35 are continuously connected. As a result, air is smoothly guided to reduce pressure loss and leakage of cooling air sent from the blower is reduced.

The air guide plate 35 on the bottom side guides air from the blower outlet 30 to the object to be cooled 27 through the object to be cooled 26.
In the air guiding process, the A interval 38 that is the clearance between the air guide plate 35 and the A cooled object 26 is set differently from the B interval 39 that is the clearance between the air guiding plate 35 and the B cooled object 26. Yes. Thereby, it sets so that the air volume used as each required cooling amount of A to-be-cooled object 26 and B to-be-cooled object 27 may be guided.

The air guide plate 35 on the upper surface side guides air from the blower outlet 30 to the B exhaust outlet 24.
In the air guiding process, a flow dividing plate 34 is provided, and the air volume to the B exhaust port 24 is adjusted and set by a C interval 40 which is a clearance between the air guiding plate 35 and the flow dividing plate 34.
The cooling air to the B exhaust port 24 is guided in a state in which the A object to be cooled 26 and the B object to be cooled 27 are hardly cooled, so the air temperature is close to the room temperature sucked into the main body 1. Since the air guided to the A exhaust port 23 is after the cooling of the A object 26 and the B object 27 and the like, it is at a relatively high temperature.

The air in the A exhaust port 23 and the B exhaust port 24 flows in from the A chamber inlet 16 and the B chamber inlet 17, respectively, is mixed in the chamber 12, and blows out from the outlet 15 to cool the induction heating coil 11.
The temperature of the cooling air is adjusted by the air volume balance between the A exhaust port 23 and the B exhaust port 24. That is, the temperature of the cooling air is adjusted and set by the C interval 40 that is the clearance between the air guide plate 35 and the flow dividing plate 34.
In addition, of the wall surfaces of the case A component 19 and the case B component 20, a case convex portion 28 having a convex shape on the inner side of the case is provided at a portion where the A cooled object 26 and the B cooled object 27 are arranged. Yes. Thereby, the clearance between the A object to be cooled 26, the B object to be cooled 27, and the case wall surface is narrowed, and leakage of cooling air is suppressed.

Heretofore, the configuration of the induction heating cooker according to the first embodiment has been described.
Next, the operation of the induction heating cooker according to the first embodiment will be described.

(1) When the circuit of the electronic circuit board 25 operates, an alternating current is supplied to the induction heating coil 11.
When an alternating current flows through the induction heating coil, lines of magnetic force are generated from the induction heating coil 11, and eddy currents are generated on an object to be heated (not shown) placed on the top plate 4 substantially above the induction heating coil 11. As a result, the object to be heated itself generates heat and cooking is performed.

(2) By supplying an alternating current to the induction heating coil 11, electronic parts such as the A object to be cooled 26 and the B object to be cooled 27 mounted on the electronic circuit board 25 self-heat and the temperature rises. Further, the induction heating coil 11 also self-heats and the temperature rises.
In order to maintain the functions of the electronic circuit on the electronic circuit board 25 and the induction heating coil 11, it is necessary to suppress these temperature rises within a predetermined temperature.
For this reason, the electronic circuit on the electronic circuit board 25 controls the driving means 32 of the blower based on information from temperature sensors (not shown) provided at various places.

(3) When the driving means 32 operates, the sirocco fan 33 rotates and cooling air is blown. The cooling air passes from the outside of the main body 1 through the grill 5 and flows in from the housing intake port 8, and is sucked from the intake air passage 10 through the intake chamber 36 to the sirocco fan 33 through the substrate case intake port 22.
The air path from the housing intake port 8 to the substrate case intake port 22 is almost sealed, and air in the main body 1 is not mixed. Further, since the air passage wall surface also has a heat insulating action, the thermal influence by the heat source inside the main body 1 is mitigated.
As a result, the cooling air flows into the substrate case 14 at substantially the same temperature as the air temperature outside the main body 1.

(4) The air sent from the sirocco fan 33 passes through the blower casing 29 and is blown from the blower outlet 30 as cooling air for the electronic components that are objects to be cooled of the electronic circuit board 25.

(5) The case B component 20 is provided with an air guide plate 35 from the blower outlet 30 toward the board surface of the electronic circuit board 25. The blown cooling air is guided by the airflow path formed by the board surface of the electronic circuit board 25, the wall surface of the case B component 20, and the air guide plate 35 while suppressing leakage and diffusion of the cooling air.

(6) The guided cooling air is divided by the flow dividing plate 34 into two flows, ie, a flow toward the B exhaust port 24 and a flow toward the A object 26 to be cooled. The distribution of the air volume by the diversion is adjusted and set by the C interval 40.

(7) The cooling air guided to the object to be cooled first cools the object A to be cooled 26 and then cools the object B to be cooled 27.
An A interval 38 is provided between the A object to be cooled 26 and the air guide plate 35, and a part of the cooling air does not cool the A object to be cooled 26 and does not rise in temperature, so Is done.
When all the cooling air is passed through the A object 26 and then guided to the B object 27, the A object 26 may be cooled more than the necessary cooling amount and the pressure loss may increase. is there.
Therefore, a part of the cooling air is bypassed from the cooling of the A object 26 at the A interval 38, so that unnecessary cooling and pressure loss are reduced and the cooling capacity necessary for the A object 26 is adjusted.・ It is set.
The B interval 39 is set to a narrow interval so that all the cooling air guided to the B cooled object 27 passes through the B cooled object 27.
Depending on the required amount of cooling of the objects to be cooled after the B object 27, the setting of the A interval 38 and the B interval 39 can be changed to adjust the respective cooling capacities.

(8) The cooling air that has passed through the B object to be cooled 27 flows into the chamber 12 from the A chamber inlet 16 connected to the A exhaust port 23.
The cooling air divided by the flow dividing plate 34 does not pass through the object to be cooled and is guided to the B exhaust port 24 without increasing in temperature, and flows into the chamber 12 from the B chamber inlet 17.
In the chamber 12, the cooling air from the A chamber inlet 16 and the cooling air from the B chamber inlet 17 are mixed, and the blowing induction heating coil 11 is cooled from the outlet 15.

(9) When all of the cooling air blown from the chamber 12 is the cooling air after passing through the object to be cooled of the electronic circuit board 25, the object to be cooled of the electronic circuit board 25 is cooled more than the necessary cooling amount. As it is done, the pressure loss may increase.
Therefore, a part of the cooling air is diverted by the flow dividing plate 34, and the air is guided to the chamber 12 from the B exhaust port 24 by bypassing the cooling of the electronic circuit board 25.
The C interval 40 is adjusted and set so that the cooling capacity required for the induction heating coil 11 is obtained by mixing with the cooling air from the A exhaust port 23 while reducing unnecessary cooling and pressure loss by the above configuration. .

(10) The cooling air that has cooled the induction heating coil 11 passes through the inside of the main body 1, passes through the grill 5 from the housing exhaust port 9, and is exhausted outside the main body 1.

  The operation of the induction heating cooker according to the first embodiment has been described above.

As described above, in the induction heating cooker according to the first embodiment, the board case intake port 22, the blower casing 29, the blower blower outlet 30, and the driving means support portion 31 constituting the blower are integrated with the board case 14. Formed with. The substrate case 14 is provided with an A exhaust port 23 and a B exhaust port 24.
Thereby, the assembly of the blower can be performed at the same time as the assembly of the substrate case 14, and the time and labor of assembly can be reduced. Further, the substrate case 14 and the blower casing 29 which is the blower outer shell are integrated, so that the amount of material used can be reduced and the cost can be reduced.
Further, since the cooling air sent from the blower outlet 30 is sucked into the substrate case intake port 22 and the cooling air is not circulated in the substrate case 14, the cooling efficiency is improved.
Furthermore, by integrating the substrate case 14 and the blower, the degree of freedom of the shape and arrangement of the blower is increased, and a blower having an appropriate size and capacity can be used. Thereby, fan noise can be reduced and the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the first embodiment, the air guide plate 35 is provided as a part of the substrate case 14 between the blower outlet 30 and the object to be cooled on the electronic circuit board 25. Further, in the vicinity of the wall to be cooled A and the object B to be cooled 27 of the wall surface of the substrate case 14, a case convex portion 28 having a convex shape inside is provided.
Thereby, the rate at which the cooling air sent out by the blower reaches the object A to be cooled 26 and the object B to be cooled 27 is increased, the cooling efficiency is improved, and the diffusion of the cooling air to unnecessary parts is suppressed, Useless air blowing is unnecessary. Therefore, the load on the blower is reduced, noise is reduced, and the operation sound of the induction heating cooker can be reduced.
Furthermore, it is not necessary to install wind guides and wind leakage prevention means on the electronic circuit board 25, material costs and assembly costs are reduced, and product costs can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 1, the space | interval of the baffle plate 35 and a to-be-cooled object was made into the A space | interval 38 and the B space | interval 39 which changes with objects to be cooled.
As a result, an appropriate air volume is set so as to obtain an optimal cooling capacity for each electronic component that is the object to be cooled. Moreover, pressure loss is reduced, the load on the blower is reduced, noise is reduced, and the operation sound of the induction heating cooker can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 1, the rotating shaft of the drive means 32 was provided in parallel with the shortest width direction among the width | variety of the substrate case 14, depth, and a height direction.
Thereby, the fan outer diameter of the sirocco fan 33 can be maximized in the substrate case 14. Therefore, while raising the ventilation capability of a blower, the rotation speed of the sirocco fan 33 can be suppressed, the noise of a blower can be made small, and the operation sound of an induction heating cooking appliance can be made small.

In addition, in the induction heating cooker according to the first embodiment, the rotation axis of the driving means 32 and the surface direction of the electronic circuit board 25 are arranged substantially perpendicularly, and the sirocco fan 33, the blower casing 29, the blower outlet 30 and the like are arranged. A part of the blower was arranged so as to overlap the plate surface of the electronic circuit board 25 in the normal direction.
Thereby, space efficiency can be increased and the board area can be increased, so that many functions can be mounted on the electronic circuit board 25. Moreover, by reducing the number of substrates and improving the assemblability, the assembly cost can be reduced, and a multi-function and low-cost induction heating cooker can be obtained.

Further, in the induction heating cooker according to the first embodiment, at least a part of the blower such as the blower casing 29 and the sirocco fan 33 is a portion in which the gap in the height direction of the casing 2 is narrowed by the bottom rising portion 37. Arranged.
Thereby, since the dead space in the housing | casing 2 is utilized effectively and a mounting density increases and another function can be mounted, a multifunctional induction heating cooking appliance can be obtained.

Further, in the induction heating cooker according to the first embodiment, the sirocco fan 33 and the driving means 32 are fixed to the case C component 21 and attached detachably from the outer peripheral side of the substrate case 14.
Thereby, the maintenance of the sirocco fan 33 and the drive means 32 can be performed without disassembling all of the substrate case 14, so that the maintenance performance can be improved and the maintenance cost can be reduced.

Further, in the induction heating cooker according to the first embodiment, the electronic circuit board 25 is arranged in the board case 14 substantially perpendicular to the bottom surface, and the board surface is arranged on the outer peripheral surface side of the housing 2.
As a result, the electronic components on the electronic circuit board 25 are disposed far away from the cooking unit 7 that is the heat source inside the housing 2, and the case B component 20 wall surface of the substrate case 14 inside the housing 2 Cooling air flows between the substrate surfaces of the electronic component substrate 25.
Therefore, since heat transfer from the cooking unit 7 which is a heat source inside the housing 2 is reduced, the amount of cooling air can be reduced, noise is reduced by reducing the load on the blower, and the operation of the induction heating cooker Sound can be reduced.

Further, in the induction heating cooker according to the first embodiment, the intake air passage 10 and the intake chamber 36 are provided between the housing intake port 8 and the substrate case intake port 22, and the intake air passage 10 and the intake chamber 36 are connected to the substrate. The case C component 21 and the inlet cover 18 are formed.
Thereby, in the air path of the housing intake port 8 and the substrate case intake port 22, high-temperature air in the housing 2 is not mixed into the cooling air. In addition, the temperature of the air flowing into the substrate case 14 is less likely to rise due to heat transfer from the cooking unit 7 that is a heat source inside the housing 2.
Therefore, cooling can be performed with a small amount of air flow, and the load on the blower is reduced and noise is reduced, so that the operation sound of the induction heating cooker can be reduced.

  In addition, in the induction heating cooker according to the first embodiment, by forming at least part of the intake air passage 10 and the intake chamber 36 with the substrate case 14, the number of parts and the amount of material used can be reduced, and the assembling property can be reduced. Can be improved. Thereby, the product cost can be reduced.

In the induction heating cooker according to the first embodiment, the A exhaust port 23 and the B exhaust port 24 of the substrate case 14 and the A chamber inlet 16 and the B chamber inlet 17 of the chamber 12 are connected by an air path. did.
Thereby, in the process in which the cooling air sent from the blower reaches the chamber 12, high-temperature air in the housing 2 is mixed in or heat transfer from the cooking unit 7 which is a heat source inside the housing 2. It is suppressed that the temperature of the air rises.
Therefore, the temperature difference between the induction heating coil 11 that is the object to be cooled and the cooling air can be increased, and cooling can be performed with a small amount of air.

Note that when cooling is performed by blowing exhaust gas from the substrate case 14 to the induction heating coil 11, depending on the positional relationship between the exhaust port of the substrate case 14 and the induction heating coil 11, the cooling air from the exhaust port is sufficiently applied to the induction heating coil 11. May not reach and may not cool properly.
In this regard, according to the first embodiment, the cooling air blown from the blowout port 15 can easily reach the lower surface of the induction heating coil 11 by arranging the chamber 12 below the induction heating coil 11. And appropriate cooling can be performed.
Thereby, cooling can be performed with a small amount of air, cooling efficiency is improved, the load on the blower is reduced, and noise is reduced, so that the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the first embodiment, in the substrate case 14, the flow dividing plate 34 is provided between the blower outlet 30 and the A cooled object 26, and the cooling air is supplied to the B exhaust outlet 24. The flow was divided into a flow toward and a flow toward the object to be cooled 26.
Further, the substrate case 14 is provided with an A exhaust port 23 and a B exhaust port 24, the B exhaust port 24 and the B chamber inlet 17 are connected, and a part of the cooling air is directly passed to the chamber 12 by bypassing the object to be cooled. It was configured to guide the wind.
Accordingly, the A object to be cooled 26 and the B object to be cooled 27 are cooled to appropriate temperatures without being excessively cooled, so that the cooling efficiency is improved. Further, the pressure loss can be reduced by the cooling air bypassing the object to be cooled.
In addition, regarding the cooling of the induction heating coil 11, the cooling air blown out from the outlet 15 after being mixed with the cooling air flowing in from the A chamber inlet 16 by bypassing the B exhaust port 24 to the chamber 12 and introducing the air. Temperature adjustment and air volume adjustment can be easily performed.
Thereby, the induction heating coil 11 can be cooled to an appropriate temperature, the load on the blower is reduced, noise is reduced, and the operation sound of the induction heating cooker can be reduced.

Further, in the induction heating cooker according to the first embodiment, the sirocco fan 33 is used for the blower integrally formed with the substrate case 14.
As a result, the blower is adapted to the shape and dimensions of the blower casing 29, the dynamic pressure component is sufficiently converted to static pressure, and the blowing capacity corresponding to the air volume and pressure loss necessary for cooling is obtained, so that the blower noise is reduced. The operating sound of the induction heating cooker can be reduced.

Embodiment 2. FIG.
FIG. 10 is a bottom perspective view of the induction heating cooker according to Embodiment 2 of the present invention.
In FIG. 10, a main body front side exhaust port 41 is provided at the lower left and right sides of the front surface of the main body 1, and ventilation inside the main body 1 is ensured. The main body front side exhaust port 41 is used for exhausting cooling air or the like.
The perspective view is the same as that described in FIG. 1 of the first embodiment.

FIG. 11 is a perspective view of the main body 1 with the top plate 4 and the grill 5 removed.
The components and the like are generally the same as those described in FIG. 2 of the first embodiment, but the configuration around the substrate case 14 described in detail below is different from that in the first embodiment.

FIG. 12 is a top view of the main body 1 with the casing top surface 3, the top plate 4, the grill 5, and the right induction heating coil 11 removed from the induction heating cooker.
A blower outlet 15 is provided on the upper surface of the chamber 12 disposed below the induction heating coil 11. The cooling air sent from the blower outlet 12 contacts the bottom surface of the induction heating coil 11 to cool the induction heating coil 11. An opening of a chamber inlet 42 is provided on the bottom surface of the chamber 12 and is connected to a duct 43 for ventilation.

FIG. 13 is a perspective view showing a state in which the right substrate case 14, the air inlet cover 18, and the chamber 12 are assembled. Since the left and right configurations of the induction heating cooker are symmetrical and substantially equivalent, the following description will be made using the right side.
A C exhaust port 46 is provided on the front wall surface of the substrate case 14.
The substrate case 14 is composed of three components, a case A component 19, a case D component 44, and a case E component 45, from the side.
The intake air passage 10 is formed as an air passage by the intake cover 18 and the case E component 45. The duct 43 is formed as an air path by the case D component 44 and the case E component 45.
The air passage from the intake air passage 10 through the substrate case 14 to the C exhaust port 46, and the air passage from the duct 43 to the chamber 12 through the chamber inlet 42 to the air outlet 15 are almost sealed. Almost all of the air flowing into the intake air passage 10 flows out of the C exhaust port 46 and the air outlet 15 and is formed as an integral air passage.

FIG. 14 is a perspective view of the substrate case 14 in an assembled state.
A substrate case intake port 22 is provided on a side surface of the substrate case 14 and is connected to the intake air passage 10. A duct exhaust port 47 is provided on the upper surface of the substrate case 14 and connected to the chamber inlet 42.
In the substrate case 14, an air path is formed from the substrate case intake port 22 to the C exhaust port 46 and the duct exhaust port 47.

FIG. 15 is an exploded perspective view of the substrate case 14.
An electronic circuit board 25 is fixed to the case A component 19. The board surface of the electronic circuit board 25 is fixed vertically to the outer peripheral side of the housing 2 of the board case 14. Cooling air flows between the board surface of the electronic circuit board 25 and the case D component 44.

  Electronic components such as the A object to be cooled 26 and the B object to be cooled 27 are mounted on the electronic circuit board 25. Of the wall surface of the case A component 19, the vicinity of where the A object to be cooled 26 and the B object to be cooled 27 are arranged is provided with a case convex portion 28 and has a convex shape inside.

A C exhaust port 46 is provided on the front surface of the case D component 44. A flow dividing plate 34 is provided on the side surface and forms a part of the outer shell of the duct 43.
A scroll-shaped blower casing 29 is formed on a part of the wall surface extending from the top surface to the bottom surface to accommodate the turbofan 48. The driving means 32 of the turbo fan 48 is held by a driving means support portion 31 provided in the case D component 44. An opening of the blower outlet 30 is formed at the center of the case D component 44.

The board case intake port 22 provided in the case E component 45 also functions as a blower intake port. A bell mouth shape is formed on the outer periphery of the substrate case inlet 22.
Case E component 45 forms part of the outer shell of duct 43.
The case D component 44 and the case E component 45 form a duct 43 and a duct exhaust port 47.

  By assembling the substrate case 14, the driving means 32 that is a component of the blower, the substrate case intake port 22 that is a blower suction port, the turbo fan 48, the blower casing 29, and the blower blower outlet 30 are integrated with the substrate case 14. Formed.

FIG. 16 is a perspective view of the case D component 44. It is a perspective view from the inner side of the substrate case 14 opposite to FIG.
A drive means support 31 is provided inside the blower casing 29 of the case D component 44, and the drive means 32 is fixed. A flow dividing plate 34 is provided at the blower outlet 30, and a wind guide plate 35 is integrally formed.

FIG. 17 is a top cross-sectional view of the state in which the air inlet cover 18 and the substrate case 14 are assembled.
An intake chamber 36 connected to the intake air passage 10 is provided in front of the substrate case intake port 22 by the intake port cover 18 and the substrate case 14.
The electronic circuit board 25 is partially arranged in parallel with the turbo fan 48, the board case inlet 22, the blower outlet 30, and the like, which are constituent elements of the blower. Thus, a large space between the front surface and the back surface of the substrate case 14 is secured as a space for the electronic circuit board 25.

Electronic parts and heat dissipation members mounted on the electronic circuit board 25 are arranged with relatively few protrusions from the electronic circuit board 25 and less cooling required in the part parallel to the blower part. In front of the blower outlet 30, there is a need for cooling, such as the A object to be cooled 26, the B object to be cooled 27, or an electronic component or a heat dissipation member having a large protrusion from the electronic circuit board 25 is mounted. .
Further, in the wall surface of the case D component 44, a case convex portion 28 having a convex shape on the inner side of the case is provided in a portion where the A cooled object 26 and the B cooled object 27 are arranged.

An air guide plate 35 is provided at the blower outlet 30 so as to close a gap between the electronic circuit board 25 and the board surface.
Further, the air flow path through which the cooling air passes by the flow dividing plate 34 provided at the blower outlet 30 is formed by the case A component 19 and the case D component 44 and reaches the C exhaust port 46, and the case D component 44. The air is diverted into two air paths, the air path leading to the duct exhaust port 47 through the duct 43 formed by the case E component 45, and the air is guided.
The ratio of the air volume distribution to each air passage is adjusted by the ratio of the cross-sectional area of the A cross-section 49 and the B cross-section 50 that the flow dividing plate 34 divides the air passage cross section of the blower outlet 30 to the required cooling amount of each air passage. The air volume distribution is set accordingly.

FIG. 18 is a side sectional view of the periphery of the substrate case 14.
A bottom elevation portion 37 is provided on the bottom surface of the housing 2 for the purpose of ensuring workability and the like, and the interval in the height direction of the housing 2 is narrowed. In such a part, parts and the like are difficult to arrange, and often becomes a dead space.
In the second embodiment, by arranging the blower casing 29 formed integrally with the substrate case 14 in this portion, the space is effectively used and more parts / functions can be mounted. .

The blower outlet 30 is provided with a shape in which a blower casing 29 and a wind guide plate 35 integrally formed with the case D component 44 are continuously connected. As a result, air is smoothly guided to reduce pressure loss, and leakage of cooling air sent from the blower is reduced.
In addition, the blower outlet 30 is arranged in a direction in which the airflow blown from the blower outlet 30 including the blower components such as the blower casing 29 reaches an angle to reach the A object 26 in the shortest time. Therefore, the air path from the blower outlet 30 formed by the air guide plate 35 to the object A to be cooled 26 does not need to be bent and the pressure loss is minimized.

In addition, among the wall surfaces of the case A component 19 and the case D component 44, a portion where the A object 26 and the B object 27 are disposed is provided with a case protrusion 28 having a convex shape inside the case. .
Thereby, the clearance between the A object to be cooled 26, the B object to be cooled 27, and the case wall surface is narrowed, and leakage of cooling air is suppressed.
A main body front side exhaust port 41 is provided at the bottom of the front side of the main unit 1, and the cooling air exhausted from the C exhaust port 46 of the substrate case 14 is mainly exhausted outside the main unit 1.

Heretofore, the configuration of the induction heating cooker according to the second embodiment has been described.
Next, the operation of the induction heating cooker according to the second embodiment will be described.

(1) When the circuit of the electronic circuit board 25 operates, an alternating current is supplied to the induction heating coil 11.
When an alternating current flows through the induction heating coil, lines of magnetic force are generated from the induction heating coil 11, and eddy currents are generated on an object to be heated (not shown) placed on the top plate 4 substantially above the induction heating coil 11. As a result, the object to be heated itself generates heat and cooking is performed.

(2) By supplying an alternating current to the induction heating coil 11, electronic parts such as the A object to be cooled 26 and the B object to be cooled 27 mounted on the electronic circuit board 25 self-heat and the temperature rises. Moreover, the induction heating coil 11 also self-heats and the temperature rises.
In order to maintain the functions of the electronic circuit board 25 and the induction heating coil 11, it is necessary to suppress these temperature rises within a predetermined temperature.
For this reason, the circuit of the electronic circuit board 25 controls the driving means 32 of the blower based on information of temperature sensors (not shown) provided at various places.

(3) When the driving means 32 operates, the turbo fan 48 rotates and blows cooling air. Cooling air flows from the outside of the main body 1 through the grille 5 and flows into the housing intake port 8, and is sucked from the intake air passage 10 through the intake chamber 36 to the turbo fan 48 through the substrate case intake port 22.
The air path from the housing intake port 8 to the substrate case intake port 22 is almost sealed, and air in the main body 1 is not mixed. Further, since the air passage wall surface has a heat insulating action, heat transfer due to heat generated by the cooking unit 7 which is a heat source inside the main body 1 is also reduced.
As a result, the cooling air flows into the substrate case 14 at substantially the same temperature as the air temperature outside the main body 1.

(4) The dynamic pressure component of the air sent from the turbo fan 48 is converted into static pressure in the blower casing 29 and blown out from the blower outlet 30.
Although the turbo fan 48 is used in the second embodiment, it may be more appropriate to use a radial fan or a sirocco fan depending on the shape of the blower casing 29 and the required air volume / pressure loss.

(5) The blown air is diverted into the air volume at a ratio set according to the required cooling amount of each air path by the flow dividing plate 34 provided at the blower outlet 30.
One is used as cooling air for the electronic circuit board 25 in the air passage formed by the case A component 19 and the case D component 44, and the other is used as cooling air for the other objects to be cooled, the case D component 44 and the case E component 45. The air is blown to the duct 43 to be formed.

(6) The cooling air that has flowed from the blower outlet 30 into the air passage formed by the case A component 19 and the case D component 44 is guided from the case D component 44 toward the board surface of the electronic circuit board 25. The air is guided to the object to be cooled 26 while suppressing leakage and diffusion of the cooling air by the air passage formed by the plate 35, the board surface of the electronic circuit board 25, and the wall surface of the case D component 44.
The blower outlet 30 is disposed including the blower components such as the blower casing 29 at an angle in a direction in which the cooling air reaches the A cooled object 26 in the shortest time.
Therefore, it is not necessary to bend the air passage, and the pressure loss can be kept low.
Further, since the air guide plate 35 is formed integrally with the case D component 44 continuously from the blower casing 29, smooth air guide is performed and the occurrence of pressure loss can be reduced.

(7) The cooling air that has cooled the object to be cooled 26 is guided to the object to be cooled 27 to be cooled.
Of the wall surface of the substrate case 14, a case convex portion 28 is provided in the vicinity of the A object to be cooled 26 and the B object to be cooled 27, and cooling air flows through the gap between the object to be cooled and the wall surface. A reduction in cooling efficiency is suppressed.

(8) The cooling air that has cooled the object to be cooled is exhausted into the main body 1 from the C exhaust port 46 and then exhausted mainly from the main body front side exhaust port 41 to the outside of the main body 1.
Since the C exhaust port 46 and the main body front side exhaust port 41 can be almost straight and have the shortest air path, the pressure loss is kept lower than when exhausted from the housing exhaust port 9 provided at the upper rear side of the main body 1. It is done.

(9) The cooling air blown into the duct 43 flows into the chamber 12 from the chamber inlet 42 connected to the duct exhaust port 47. Next, the cooling air is blown to the bottom surface of the induction heating coil 11 from the air outlet 15 on the top surface of the chamber 12 to cool the induction heating coil 11.
The cooling air that has cooled the induction heating coil 11 passes through the inside of the main body 1, passes through the grill 5 from the housing exhaust port 9, and is exhausted outside the main body 1.

(10) Since the cooling air that is diverted and blown from the blower outlet 30 flows into the chamber 12 without passing through the object to be cooled, it reaches the induction heating coil 11 while keeping the temperature low due to cooling.
Therefore, since the temperature difference between the induction heating coil 11 and the cooling air can be increased, cooling can be performed with a small amount of air. Moreover, since it does not pass through the object to be cooled, generation of pressure loss can be suppressed. In addition, since the air volume is small, it is possible to suppress the occurrence of pressure loss when passing through the chamber 12, the air outlet 15, the housing exhaust 9 or the like.

  The operation of the induction heating cooker according to the second embodiment has been described above.

As described above, in the induction heating cooker according to the second embodiment, the board case intake port 22, the blower casing 29, the blower outlet 30, the drive means support portion 31, and the like, which are constituent elements of the blower, are connected to the substrate case 14. It was formed as a unitary structure. Further, the substrate case 14 is provided with a substrate case intake port 22, a C exhaust port 46, and a duct exhaust port 47.
Thereby, the assembly of the blower can be performed at the same time as the assembly of the substrate case 14, and the labor of the assembly can be reduced. Further, the substrate case 14 and the blower casing 29, which is a blower outer shell, are integrated, so that the amount of material used can be reduced and the cost can be reduced.
Further, since the cooling air sent from the blower outlet 30 is sucked into the substrate case intake port 22 and the cooling air is not circulated in the substrate case 14, the cooling efficiency is improved.
Furthermore, by integrating the substrate case 14 and the blower, the degree of freedom of the shape and arrangement of the blower is increased, and a blower having an appropriate size and capacity can be used. Thereby, fan noise can be reduced and the operation sound of the induction heating cooker can be reduced.

Further, in the induction heating cooker according to the second embodiment, the air guide plate 35 is provided as a part of the substrate case 14 between the blower outlet 30 and the object to be cooled of the electronic circuit board 25. Further, in the vicinity of the wall surface of the substrate case 14 where the A object to be cooled 26 and the B object to be cooled 27 are disposed, a case convex portion 28 having a convex shape inside is provided.
As a result, the rate at which the cooling air sent out by the blower reaches the A cooled object 26 and the B cooled object 27 is increased, the cooling efficiency is improved, and the diffusion of the cooling air to unnecessary parts is suppressed and wasted. Air blowing is unnecessary. Therefore, the load on the blower is reduced, noise is reduced, and the operation sound of the induction heating cooker can be reduced.
Further, it is not necessary to install wind guides and wind leakage prevention means on the electronic circuit board 25, so that material costs and assembly costs are reduced, and product costs can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 2, an angle is set to the blower blower outlet 30 so that the blowing direction of the cooling air from the blower blower outlet 30 may face the A to-be-cooled object 26 of the electronic circuit board 25. Arranged.
Thereby, the flow line of the cooling air from the blower outlet 30 to the A object to be cooled 26 can be approximately straight and shortest, and the pressure loss due to the bending of the air passage or the like can be suppressed. Therefore, since the pressure loss of an air path can be reduced and a fan load can be suppressed, a fan noise can be reduced and the operation sound of an induction heating cooking appliance can be made small.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 2, the rotating shaft of the drive means 32 was provided in parallel with the width direction used as the shortest among the width | variety of the substrate case 14, depth, and a height direction.
Thereby, the fan outer diameter of the turbo fan 48 can be maximized in the substrate case 14. Therefore, it is possible to increase the blowing capacity and to reduce the rotation speed of the turbo fan 48, to reduce the fan noise and to reduce the operation sound of the induction heating cooker.

In addition, in the induction heating cooker according to the second embodiment, the rotation axis of the driving means 32 and the surface direction of the electronic circuit board 25 are arranged substantially perpendicularly, and the turbo fan 48, the blower casing 29, the blower outlet 30 and the like are arranged. A part of the blower was arranged so as to overlap the plate surface of the electronic circuit board 25 in the normal direction.
Thereby, space efficiency can be increased, the board area can be increased, and many functions can be mounted. Further, by reducing the number of substrates, the substrate cost can be reduced, and further, the assembly cost can be reduced by improving the assemblability, so that a multi-function and low-cost induction heating cooker can be obtained.

In addition, in the induction heating cooker according to the second embodiment, at least a part of the blower such as the blower casing 29 and the turbo fan 48 is a portion in which the gap in the height direction of the casing 2 is narrowed by the bottom rising portion 37. Arranged.
Thereby, since the dead space in the housing | casing 2 is utilized effectively and a mounting density increases and another function can be mounted, a multifunctional induction heating cooking appliance can be obtained.

Further, in the induction heating cooker according to the second embodiment, the turbo fan 48 is fixed to the case D component 44 and attached to the driving means 32, and the case E component 45 is detachably attached from the outer peripheral side of the substrate case 14.
As a result, maintenance of the turbofan 48 can be performed without disassembling all of the substrate case 14, so that maintenance can be improved and maintenance cost can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the drive means support portion 31 is provided on the case D component 44 and the drive means 32 is attached.
As a result, the driving means support portion 31 and the driving means 32 are not arranged in the board case intake port 22, and anything that obstructs the flow of airflow is not arranged in the front air path of the board case intake port 22.
Therefore, the airflow flowing into the turbo fan 48 is not disturbed and the pressure loss in the air passage does not increase, so that the fan noise is reduced and the operation noise of the induction heating cooker can be reduced.

Further, in the induction heating cooker according to the second embodiment, the electronic circuit board 25 is arranged in the board case 14 substantially perpendicular to the bottom surface, and the board surface is arranged on the outer peripheral surface side of the housing 2.
As a result, the electronic components on the electronic circuit board 25 are disposed far away from the cooking unit 7 that is the heat source inside the housing 2, and the wall surface of the case D component 44 of the substrate case 14 inside the housing 2 Cooling air flows between the substrate surfaces of the electronic component substrate 25.
Therefore, since heat transfer from the cooking unit 7 which is a heat source inside the housing 2 is reduced, the amount of cooling air can be reduced, noise is reduced by reducing the load on the blower, and the operation of the induction heating cooker Sound can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the intake air passage 10 and the intake chamber 36 are provided between the housing intake port 8 and the substrate case intake port 22, and the intake air passage 10 and the intake chamber 36 are connected to the substrate case. The E part 45 and the inlet cover 18 are formed.
As a result, high-temperature air in the housing 2 is not mixed into the outside air sucked in the air passages of the housing intake port 8 and the substrate case intake port 22. In addition, the temperature of the air flowing into the substrate case 14 is less likely to rise due to heat transfer from the cooking unit 7 that is a heat source inside the housing 2.
Therefore, cooling can be performed with a small amount of air flow, and the noise of the fan is reduced by reducing the load of the blower. Therefore, the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the intake air passage 10 and a part of the intake chamber 36 are formed by the substrate case 14.
As a result, the number of parts and the amount of materials used can be reduced, and further, the assemblability can be improved, so that the product cost can be reduced and the cost can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the duct 47 of the substrate case 14 and the chamber 12 arranged below the induction heating coil 11 are connected to each other through the air inlet at the chamber inlet 42.
Thereby, in the process in which the cooling air from the blower integrally formed on the substrate case 14 reaches the chamber 12, high-temperature air in the housing 2 is not mixed and is a heat source inside the housing 2. Air temperature rise due to heat transfer from the cooking unit 7 is suppressed.
Therefore, the temperature difference between the induction heating coil 11 that is the object to be cooled and the cooling air can be increased, and cooling can be performed with a small amount of air.

Note that when cooling is performed by blowing exhaust gas from the substrate case 14 to the induction heating coil 11, depending on the positional relationship between the exhaust port of the substrate case 14 and the induction heating coil 11, the cooling air from the exhaust port is sufficiently applied to the induction heating coil 11. May not reach and may not cool properly.
In this regard, according to the first embodiment, the cooling air blown from the blowout port 15 can easily reach the lower surface of the induction heating coil 11 by arranging the chamber 12 below the induction heating coil 11. And appropriate cooling can be performed.
Thereby, cooling can be performed with a small amount of air, cooling efficiency is improved, the load on the blower is reduced, and noise is reduced, so that the operation sound of the induction heating cooker can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 2, the flow-distribution board 34 is provided in the blower blower outlet 30, the air path cross section of the blower blower outlet 30 is divided | segmented by the flow diversion board 34, and the divided A cross section 49 and B cross section The flow is diverted to the set air volume ratio according to the ratio of 50 airway cross-sectional areas.
The divided cooling air is sent to the object to be cooled in the substrate case 14 and the object to be cooled outside the substrate case 14. Further, the cooling air diverted to the object to be cooled outside the substrate case 14 is guided to cool the induction heating coil 11 that is the object to be cooled outside the substrate case 14.
As a result, it is not necessary to provide a cooling fan in the induction heating coil 11 that is an object to be cooled outside the board case 14, the number of parts is reduced, the assemblability is improved, the parts / assembly costs are reduced, and the product cost is reduced. Can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the A cooled object 26 and the B cooled object 27 that are cooled objects in the substrate case 14 and the cooled object outside the substrate case 14 are separated by the flow dividing plate 34. The air volume is adjusted and set so that each induction heating coil 11 is cooled to an appropriate temperature.
Thereby, useless cooling is not performed, cooling efficiency improves, a fan load is reduced, fan noise falls, and the operation sound of an induction heating cooking appliance can be made small.

In addition, in the induction heating cooker according to the second embodiment, the duct 43 used for blowing air to the outside of the substrate case 14 is formed integrally with the components of the blower, and the case D component constituting the substrate case 14 44 and a case E component 45. Further, the duct 43 was connected to the chamber 12 disposed below the induction heating coil 11.
Thus, the cooling air is bypassed through the A object 26 and the B object 27 and bypassed and blown to the chamber 12, so that there is no temperature rise due to cooling, and the induction heating coil 11 that is the object to be cooled The temperature difference can be made large.
Therefore, cooling can be performed with a small amount of air, and pressure loss due to passing through the object to be cooled does not occur. Therefore, the fan load is reduced, the fan noise is reduced, and the operation noise of the induction heating cooker can be reduced. it can.

  In addition, in the induction heating cooker according to the second embodiment, the duct 43 is formed by the parts of the substrate case 14, thereby reducing the number of parts and the amount of materials used, improving the assemblability, and reducing the cost. You can do it.

In addition, in the induction heating cooker according to the second embodiment, the substrate case intake port 22, the blower casing 29, and the like, which are constituent elements of the blower, are arranged on the back side of the induction heating cooker, and the housing intake port 8 is the main body. 1 is provided on both sides of the upper surface rear surface side, the housing exhaust port 9 is provided in the center of the upper surface rear surface side of the main body 1, and the main body front exhaust port 41 is provided on the front surface of the main body 1.
As a result, the distance between the intake air passage 10 between the housing intake port 8 and the substrate case intake port 22 can be shortened, and the air passage space can be reduced and the pressure loss in the air passage can be reduced.
Further, the opening area is enlarged by the plurality of exhaust ports of the housing exhaust port 9 and the front exhaust port 41 of the main body, and the passing wind speed is reduced.
Further, the streamline of the exhaust airflow from the C exhaust port 46 to the main body front exhaust port 41 can be shortened.
Furthermore, the pressure loss can be reduced by the effect of these distributed exhausts, the fan load is reduced, the fan noise is reduced, and the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the second embodiment, the turbo fan 48 is used for the blower formed integrally with the substrate case 14.
As a result, it is possible to obtain a blowing capacity corresponding to the air volume and pressure loss necessary for cooling while increasing the degree of freedom of the shape and dimensions of the blower casing 29, so that the blower noise is reduced and the operation sound of the induction heating cooker is reduced. can do.

Embodiment 3 FIG.
FIG. 19 is a bottom perspective view of the induction heating cooker according to the third embodiment of the present invention.
In FIG. 19, a main body front side intake port 52 is provided at the left and right lower portions of the front surface of the main body 1, and ventilation inside the main body 1 is ensured. The main body front side intake port 52 is used for intake of cooling air or the like.
The perspective view is the same as that described in FIG. 1 of the first embodiment.

FIG. 20 is a perspective view of the main body 1 with the top plate 4 and the grill 5 removed.
Case exhaust ports 9 are provided at three locations on the left and right sides and the center of the back surface side of the case upper surface 3, and are covered with a grill 5 in a normal use state.
In the third embodiment, the housing exhaust ports 9 are provided at three locations. However, the number is not limited to this, and more exhaust ports may be provided at one location as long as the housing exhaust ports 9 are arranged on the back side of the housing upper surface 3. Also good.

An induction heating coil 11 is disposed on the front left and right sides of the lower side from which the top plate 4 is removed, and a radiant heater 13 is disposed in the center on the back side.
The radiant heater 13 is used as a heat source for cooking the heated object that is heated and placed on the top plate 4. A chamber 12 is disposed below the induction heating coil 11.
In Embodiment 3, the radiant heater 13 is arranged at the center on the back side, but the induction heating coil 11 may be arranged. Further, the position and the number of the induction heating coils 11 are not limited to this, and may be one or more.

A cooking unit 7 is disposed at the lower center of the chamber 12 and the radiant heater 13, and a substrate case 14 is disposed on the left and right side surfaces.
The cooking unit 7 is configured up to the center of the front surface of the main body 1 and performs cooking such as baking, steaming and frying, steam cooking, and the like in the space inside the cooking unit 7. During the cooking operation of the cooking unit 7, heat is generated and becomes a heat source in the main body 1.

  In Embodiment 3, the cooking unit 7 is arranged at the center of the main body 1 and the substrate cases 14 are arranged on both sides thereof, but the number and arrangement of the cooking units 7 and the substrate cases 14 are not limited to this. For example, the cooking unit 7 may be disposed on the left or right side surface of the main body 1 and one substrate case 14 may be disposed on the opposite side surface, or more substrate cases 14 may be used as necessary. Good.

FIG. 21 is a top view of the main body 1 in a state in which the housing upper surface 3, the top plate 4, the grill 5, and the right induction heating coil 11 are removed.
A blower outlet 15 is provided on the upper surface of the chamber 12 disposed below the induction heating coil 11. The cooling air sent from the blower outlet 12 contacts the bottom surface of the induction heating coil 11 to cool the induction heating coil 11.
An opening of a chamber inlet 42 is provided on the side surface of the chamber 12 and is connected to a duct 43 for ventilation.

FIG. 22 is a perspective view from the center of the front side when the right substrate case 14 and the chamber 12 are assembled. Since the left and right configurations of the induction heating cooker are symmetrical and substantially equivalent, the following description will be made using the right side.
The substrate case 14 is composed of two components, a case F component 53 and a case G component 54, from the side surface side.

On the front side of the substrate case 14, a part of the wall surface of the intake air passage 10 is formed in the case F component 53, and the intake air passage 10 is configured together with the side wall surface of the housing 2 when attached to the housing 2. . The front end of the intake air passage 10 is connected to the main body front intake port 52.
The case G component 54 disposed on the inner side of the substrate case 14 is provided with a drive means support 31 and is attached with the drive means 32.
A duct 43 is provided on the upper surface of the substrate case 14 and is formed as an air path by the case F component 53 and the case G component 54. The duct exhaust port 47 is connected to the chamber inlet 42.

FIG. 23 is a perspective view from the back side surface in a state where the right substrate case 14 and the chamber 12 are assembled.
A D exhaust port 51 is provided on the back surface of the substrate case 14. A board case inlet 22 is provided on the outer peripheral side of the front side.
The air passage from the intake air passage 10 to the D exhaust port 51 through the substrate case intake port 22 of the substrate case 14, the air passage from the duct 43 to the duct exhaust port 47, and the air flow into the chamber 12 from the chamber inlet 42. The air path leading to 15 is generally sealed.
Almost all of the air flowing into the intake air passage 10 flows out of the D exhaust port 51 and the air outlet 15 and is formed as an integral air passage.

FIG. 24 is an exploded perspective view of the substrate case 14.
The electronic circuit board 25 is fixed to the case F component 53. The board surface of the electronic circuit board 25 is fixed vertically to the outer peripheral side of the housing 2 of the board case 14, and cooling air flows between the board surface of the electronic circuit board 25 and the case G component 54.

On the electronic circuit board 25, a C object 55, a D object 56, an E object 57, and an F object 58 are mounted. In these objects to be cooled, heat radiation fins are attached to electronic components.
The base portion of the radiating fin to which the electronic component is attached forms a surface substantially perpendicular to the substrate surface, and a number of parallel flat fins are formed substantially parallel to the substrate surface from the base portion.
The C cooled object 55 and the D cooled object 56 are arranged such that the base portions of the radiating fins are arranged substantially in parallel, the fin tip side is closer, and the base portion is farther away.
The E object 57 and the F object 58 are arranged in the same manner.
Moreover, the case convex part 28 is provided in the vicinity where the to-be-cooled object is arrange | positioned among the wall surfaces of the case G component 54, and it has a convex shape inside.

A D exhaust port 51 is provided on the back surface of the case G component 54. The upper surface forms a part of the duct 43, and the front upper surface, bottom surface, and side surface form a part of the intake air passage 10.
On the front side, a scroll-shaped blower casing 29 is formed on a part of the wall surface reaching the top surface, the front surface, and the bottom surface, and an opening of the blower outlet 30 is provided at an end portion thereof.
A flow dividing plate 34 is provided at the blower outlet 30, and the cooling air guided to the inside of the substrate case 14 and the duct 43 side is divided so as to have a set air volume ratio.
On the side surface, a substrate case intake port 22 that also functions as a blower intake port is provided, and a bell mouth shape is formed on the outer periphery.

By assembling the substrate case 14, the drive means 32, the substrate case intake port 22, the sirocco fan 33, the blower casing 29, and the blower outlet 30 which are constituent elements of the blower are integrally formed in the substrate case 14. .
Further, the duct 43 and the duct exhaust port 47 are formed by the case F component 53 and the case G component 54.

FIG. 25 is a perspective view of the case G component 54. It is a perspective view from the inner side of the substrate case 14 opposite to FIG.
The case G component 54 is provided with a driving means support 31, to which the driving means 32 is attached, and the sirocco fan 33 is fixed to the driving means 32. In addition, a case convex portion 28 is formed, and a plurality of air guide plates 35 are integrally formed on the electronic circuit board 25 side.

FIG. 26 is a top cross-sectional view of the right end portion of the induction heating cooker.
An intake air passage 10 is formed by the side surface of the housing 2 and the substrate case 14, and is connected to the main body front side suction port 52. The air path from the main body front side inlet 52 to the board case inlet 22 is almost sealed, and air in the main body is not mixed.
The portion where the object to be cooled, such as the object to be cooled 56 and the object to be cooled 58 is arranged, narrows the gap with the object to be cooled by the case convex portion 28 and suppresses the leakage of the cooling air. Increases contact and improves cooling efficiency.

An air guide plate 35 is provided at the blower outlet 30 so as to close a gap between the electronic circuit board 25 and the board surface.
In addition, due to the flow dividing plate 34 provided at the blower outlet 30, the cooling air flow path is divided into two air paths, the air path leading to the D exhaust port 51 and the air path leading to the duct exhaust port 47 through the duct 43. Divided.

FIG. 27 is a side sectional view of the periphery of the substrate case 14.
A top surface descending portion 59 is provided on the upper surface of the front side of the housing 2 for the purpose of construction on the system kitchen, and the interval in the height direction of the housing 2 is narrowed. In such a part, parts and the like are difficult to arrange, and often becomes a dead space.
In the third embodiment, by arranging the blower casing 29 formed integrally with the substrate case 14 in this portion, the space is effectively used and more parts / functions can be mounted. .

  The air blower outlet 30 is provided with a flow dividing plate 34, and the air passage cross section of the air blower outlet 30 is divided into an A cross section 49 and a B cross section 50, and the air is blown into the substrate case 14 and the duct 43 side. The airflow is divided so that the airflow distribution becomes the set airflow ratio.

An air guide plate 35 is formed in the case G component 54 at the blower outlet 30, and the air passage is seamless so as to continue from the flow dividing plate 34 to the C cooled object 55 and from the blower casing 29 to the D cooled object 56. Is formed.
Further, the air guide plate 35 is also provided between the C cooled object 55 and the E cooled object 57 and between the D cooled object 56 and the F cooled object 58.

The air guide plate 35 protrudes to the vicinity of the board surface of the electronic circuit board 25, and the air path that is substantially sealed by the object to be cooled, the air guide plate 35, the board surface of the electronic circuit board 25, and the wall surface of the case G component 54 Form.
Thereby, the leakage of the cooling air sent out from the blower air outlet 30 is reduced, and the passing air speed of the cooling air of the object to be cooled is increased to increase the cooling efficiency.
In addition, an air guide plate 35 is also provided between the E object 57 and the F object 58 to reduce the leakage of the cooling air between the objects to be cooled, and the passing speed of the cooling air of the object to be cooled is increased to improve the cooling efficiency. It is increasing.

  A housing exhaust port 9 is provided above the D exhaust port 51 provided on the back surface of the substrate case 14. The cooling air exhausted from the D exhaust port 51 passes through the space between the back surface of the housing 2 and the back surface of the substrate case 14, passes through the inside of the main body 1 from the housing exhaust port 9, and is exhausted to the outside.

Heretofore, the configuration of the induction heating cooker according to the third embodiment has been described.
Next, the operation of the induction heating cooker according to the third embodiment will be described.

(1) When the circuit of the electronic circuit board 25 operates, an alternating current is supplied to the induction heating coil 11.
When an alternating current flows through the induction heating coil, lines of magnetic force are generated from the induction heating coil 11, and eddy currents are generated on an object to be heated (not shown) placed on the top plate 4 substantially above the induction heating coil 11. As a result, the object to be heated itself generates heat and cooking is performed.

(2) By supplying an alternating current to the induction heating coil 11, electrons such as the C cooled object 55, the D cooled object 56, the E cooled object 57, and the F cooled object 58 mounted on the electronic circuit board 25. The part self-heats and the temperature rises. Moreover, the induction heating coil 11 also self-heats and the temperature rises.
In order to maintain the functions of the electronic circuit board 25 and the induction heating coil 11, it is necessary to suppress these temperature rises within a predetermined temperature.
For this reason, the circuit of the electronic circuit board 25 controls the driving means 32 of the blower based on information of temperature sensors (not shown) provided at various places. When the driving means 32 operates, the sirocco fan 33 rotates and the cooling air is blown.

(3) Cooling air flows from the front air inlet 52 of the main body, and is sucked by the sirocco fan 33 from the board case air inlet 22 through the air intake passage 10.
The air path from the main body front inlet 52 to the board case inlet 22 is almost sealed, and air in the main body 1 is not mixed. Further, since the air passage wall surface has a heat insulating action, heat transfer due to heat generated by the cooking unit 7 which is a heat source inside the main body 1 is reduced.
As a result, the cooling air flows into the substrate case 14 at substantially the same temperature as the air temperature outside the main body 1.

(4) The dynamic pressure component of the air sent from the sirocco fan 33 is converted into static pressure in the blower casing 29 and blown out from the blower outlet 30.
In the third embodiment, the sirocco fan 33 is used. However, depending on the shape of the blower casing 29 and the required air volume / pressure loss, it may be appropriate to use a radial fan or a turbo fan.

(5) The blown air is divided into air blown into the substrate case 14 and air blown to the duct 43 by the flow dividing plate 34 provided at the blower outlet 30.
The ratio of the air flow rate to each air passage is adjusted by the ratio of the A cross section 49 and the B cross section 50 obtained by dividing the air passage cross section of the blower outlet 30 by the flow dividing plate 34, and according to the required cooling amount of each air passage It is set to be diverted to the air volume ratio.

(6) The cooling air blown into the substrate case 14 from the blower outlet 30 is a wind guide plate 35 provided from the case G component 54 toward the substrate surface of the electronic circuit substrate 25, the substrate surface of the electronic substrate 25, Since the air is blown by the generally sealed air passage formed by the C object 55, the D object 56, the E object 57, the F object 58, and the case G part 54 wall surface, leakage and diffusion are suppressed. The
Further, an air guide plate 35 is also provided between the E object to be cooled 57 and the F object to be cooled 58 to suppress air leakage between the objects to be cooled, and the cooling air is guided to each object to be cooled. The wind speed does not decrease, and the object to be cooled is cooled efficiently.

(7) Of the wall surface of the substrate case 14, a case convex portion 28 is provided in the vicinity of the C cooled object 55, the D cooled object 56, the E cooled object 57, and the F cooled object 58. The cooling air is prevented from flowing through the gap between the object to be cooled and the wall surface and cooling efficiency is reduced.
The cooling air that has cooled the object to be cooled is exhausted from the D exhaust port 51 into the main body 1, then passes through the grill 5 from the housing exhaust port 9 and is exhausted outside the main body 1.

(8) On the other hand, the cooling air blown into the duct 43 flows into the chamber 12 from the chamber inlet 42 connected to the duct exhaust port 47, and blows from the outlet 15 on the upper surface of the chamber 12 to the bottom surface of the induction heating coil 11. The induction heating coil 11 is cooled.
After that, the cooling air passes through the inside of the main body 1, passes through the grill 5 from the housing exhaust port 9, and is exhausted outside the main body 1.

(9) The cooling air that is diverted and blown from the blower outlet 30 flows into the chamber 12 without passing through the object to be cooled, so that the temperature does not increase due to cooling and is low.
Therefore, a large temperature difference from the induction heating coil 11 can be obtained, and cooling can be performed with a small amount of air.
Moreover, since it does not pass through the object to be cooled, generation of pressure loss can be suppressed.
In addition, since the air volume is small, it is possible to suppress the occurrence of pressure loss when passing through the chamber 12, the air outlet 15, the housing exhaust 9 or the like.

(10) Since the cooling air path from the main body front side intake port 52 to the housing exhaust port 9 can be a straight line and the shortest air path from the front side of the main body to the rear side, the air is sucked from the back side of the main body and the front side of the main body The pressure loss can be kept low compared to the air path configuration as in the first embodiment in which the air is exhausted from the back side of the main body through the above.

As described above, in the induction heating cooker according to the third embodiment, the board case intake port 22, the blower casing 29, the blower blower outlet 30, the driving means support portion 31, and the like, which are constituent elements of the blower, 14 and an integral structure. Further, the substrate case 14 is provided with a substrate case intake port 22, a D exhaust port 51, and a duct exhaust port 47.
Thereby, the assembly of the blower can be performed at the same time as the assembly of the substrate case 14, and the labor of the assembly can be reduced. Further, the substrate case 14 and the blower casing 29 which is the blower outer shell are integrated, so that the amount of material used can be reduced and the cost can be reduced.
In addition, the cooling air sent from the blower outlet 30 is again sucked into the substrate case intake port 22 and the cooling air is not circulated in the substrate case 14, thereby improving the cooling efficiency.
Furthermore, by integrating the substrate case 14 and the blower, the freedom of shape and arrangement of the blower is increased, and a blower having an appropriate size and capacity can be used, so the blower noise is reduced and induction heating cooking is performed. The operating sound of the vessel can be reduced.

Further, in the induction heating cooker according to the third embodiment, between the blower outlet 30 and the C cooled object 55 and the D cooled object 56, between the C cooled object 55 and the E cooled object 57, An air guide plate 35 is provided between the cooling object 56 and the F object 58 and between the E object 57 and the F object 58 from the case G component 54 toward the board surface of the electronic circuit board 25.
As a result, the air guide plate 35, the substrate surface, the base portion of the radiating fin of the object to be cooled, and the wall surface of the substrate case G component 54 form a substantially sealed air passage, and the fin portion is arranged in the air passage. Moreover, the clearance gap between the tip of the radiation fin of E to-be-cooled object 57 and F to-be-cooled object 58 is filled, and ventilation is prevented.
Further, a case convex portion 28 having a convex shape on the inner side of the substrate case 14 is provided in the vicinity of the wall surface of the case G component 54 where the object to be cooled is disposed, thereby reducing the gap between the substrate case 14 and the object to be cooled. Yes.
As a result, the diffusion of the cooling air sent from the blower outlet 30 to unnecessary portions is suppressed, and the wind speed passing through the object to be cooled does not decrease, so that the cooling efficiency is improved. Moreover, useless ventilation becomes unnecessary, the load on the blower is reduced, noise is reduced, and the operation sound of the induction heating cooker can be reduced.

  In addition, in the induction heating cooker according to the third embodiment, the wind guide plate 35 is formed integrally with the case G component 54, so that it is not necessary to install wind guide and air leakage prevention means on the electronic circuit board 25. The material cost and the assembly cost are reduced, and the cost can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 3, the rotating shaft of the drive means 32 was provided in parallel with the width direction which becomes the shortest among the width | variety of the substrate case 14, depth, and a height direction.
Thereby, the fan outer diameter of the sirocco fan 33 can be maximized in the substrate case 14, and the air blowing capacity can be increased. Moreover, since the rotation speed of the sirocco fan 33 can be kept low and the blower noise can be reduced, the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the third embodiment, at least a part of the blower casing 29 that is a component of the blower is a portion in which the gap in the height direction of the casing 2 is narrowed by the top surface descending portion 59. Arranged.
Thereby, since the dead space in the housing | casing 2 is utilized effectively and a mounting density increases and another function can be mounted, a multifunctional induction heating cooking appliance can be obtained.

Further, in the induction heating cooker according to the third embodiment, the electronic circuit board 25 is arranged in the board case 14 substantially perpendicular to the bottom surface, and the board surface is arranged on the outer peripheral surface side of the housing 2.
Thereby, the electronic component on the electronic circuit board 25 is disposed far away from the cooking unit 7 which is a heat source inside the housing 2. In addition, cooling air flows between the wall surface of the case G component 54 of the substrate case 14 inside the housing 2 and the substrate surface of the electronic component substrate 25.
Therefore, since heat transfer from the cooking unit 7 that is a heat source inside the housing 2 is reduced, the amount of cooling air is reduced and the load on the blower is reduced, so that noise is reduced and the operation of the induction heating cooker is performed. Sound can be reduced.

In addition, in the induction heating cooker according to the third embodiment, the intake air passage 10 is provided between the main body front side intake port 52 and the substrate case intake port 22, and the case F component 53 and the housing 2 wall surface of the substrate case 14 are provided. An intake air passage 10 was formed.
Thereby, in the air path from the main body front side intake port 52 to the board case intake port 22, the mixing of high temperature air in the housing 2 is suppressed. Further, heat transfer from the cooking unit 7 is reduced, the temperature rise of the air flowing into the board case intake port 22 is reduced, the cooling efficiency is improved, and cooling can be performed with a small amount of air.
Therefore, since the load of the blower can be reduced and the noise is reduced, the operation sound of the induction heating cooker can be reduced.

  In addition, in the induction heating cooker according to the third embodiment, by forming a part of the intake air passage 10 with the substrate case 14, the number of parts and the amount of material used can be reduced and the assemblability can be improved. As a result, product costs can be reduced.

In addition, in the induction heating cooker according to the third embodiment, the duct 47 and the chamber inlet 42 of the chamber 12 disposed below the induction heating coil 11 are connected by an air path.
Thereby, in the process in which the cooling air from the blower integrally formed on the substrate case 14 reaches the chamber 12, high-temperature air in the housing 2 is mixed in, or a heat source inside the housing 2 is used. An increase in air temperature due to heat transfer from a certain cooking unit 7 is suppressed.
Therefore, the temperature difference between the induction heating coil 11 that is the object to be cooled and the cooling air can be increased, and cooling can be performed with a small amount of air.

Note that when cooling is performed by blowing exhaust gas from the substrate case 14 to the induction heating coil 11, depending on the positional relationship between the exhaust port of the substrate case 14 and the induction heating coil 11, the cooling air from the exhaust port is sufficiently applied to the induction heating coil 11. May not reach and may not cool properly.
In this regard, according to the first embodiment, the cooling air blown from the blowout port 15 can easily reach the lower surface of the induction heating coil 11 by arranging the chamber 12 below the induction heating coil 11. And appropriate cooling can be performed.
Thereby, cooling can be performed with a small amount of air, cooling efficiency is improved, the load on the blower is reduced, and noise is reduced, so that the operation sound of the induction heating cooker can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 3, the flow-distribution board 34 is provided in the blower blower outlet 30, the air path cross section of the blower blower outlet 30 is divided | segmented by the flow diversion board 34, and the divided A cross section 49 and B cross section The flow is diverted to the set air volume ratio by the ratio of 50 air passage cross-sectional areas.
The divided cooling air is sent to the object to be cooled in the substrate case 14 and the object to be cooled outside the substrate case 14. Further, the cooling air diverted to the object to be cooled outside the substrate case 14 is guided to cool the induction heating coil 11 that is the object to be cooled outside the substrate case 14.
As a result, it is not necessary to provide a cooling fan in the induction heating coil 11 that is an object to be cooled outside the board case 14, the number of parts is reduced, the assemblability is improved, the parts / assembly costs are reduced, and the product cost is reduced. Can be reduced.

In addition, in the induction heating cooker according to the third embodiment, the object to be cooled in the substrate case 14 and the induction heating coil 11 that is the object to be cooled outside the substrate case 14 are cooled to appropriate temperatures by the flow dividing plate 34. The air volume of the cooling air is adjusted and set so that
Thereby, useless cooling is not performed, cooling efficiency improves, fan load can be reduced, fan noise can be reduced, and operation noise of the induction heating cooker can be reduced.

Moreover, in the induction heating cooking appliance which concerns on this Embodiment 3, while forming the duct 43 used for the ventilation to the exterior of the substrate case 14 with the component of an air blower, case F components which comprise the substrate case 14 53 and a case G component 54. Further, the duct 43 was connected to the chamber 12 arranged below the induction heating coil 11.
As a result, the cooling air is blown to the chamber 12 without passing through the object to be cooled of the electronic circuit board 25, so that there is no temperature rise due to cooling, and the temperature difference from the induction heating coil 11 that is the object to be cooled is increased. Can take.
Therefore, the air can be cooled with a small amount of air, and pressure loss due to passing through the object to be cooled does not occur. Therefore, the fan load is reduced, the fan noise is reduced, and the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the third embodiment, the duct 43 is formed by the parts of the board case 14.
As a result, the number of parts and the amount of materials used can be reduced, the assemblability can be improved, and the product cost can be reduced.

In addition, in the induction heating cooker according to the third embodiment, the board case intake port 22, the blower casing 29, and the like, which are components of the blower, are arranged on the front side of the induction heating cooker, and the main body front intake port 52 is provided. Provided on the front surface of the induction heating cooker, the housing exhaust port 9 was provided on the back side of the upper surface of the induction heating cooker.
As a result, the distance between the intake air passage 10 between the main body front side air inlet 52 and the board case air inlet 22 can be shortened, and the air passage space can be reduced and the pressure loss in the air passage can be reduced.
The cooling air path from the main body front side intake port 52 to the case exhaust port 9 can be a straight line and the shortest air path from the front side of the main body to the back side.
Accordingly, pressure loss can be kept low compared to the air path configuration as in the first embodiment in which air is sucked from the back side of the main body and exhausted from the back side of the main body through the front side of the main body, so that useless space is reduced and more Many functions can be implemented.
Moreover, by reducing the pressure loss in the machine, the fan load is reduced, the fan noise is reduced, and the operation sound of the induction heating cooker can be reduced.

In addition, in the induction heating cooker according to the third embodiment, when the main body front side intake port 52 is provided on the front surface of the induction heating cooker, when the steam, oil smoke, or the heated object generated from the heated object falls. Even if liquid or the like in the inside flows out to the top plate, the risk of these being sucked into the main body front side intake port 52 is reduced.
Thereby, failure of the electronic circuit board 25 due to the inflow of water vapor or liquid into the substrate case 14 is suppressed, and a highly reliable and safe induction heating cooker can be obtained.

Further, in the induction heating cooker according to the third embodiment, the sirocco fan 33 is used as the blower integrally formed with the substrate case 14.
Thereby, it adapts to the shape and size of the blower casing 29, the dynamic pressure component is sufficiently converted to static pressure, and the blowing capacity suitable for the air volume and pressure loss necessary for cooling is obtained. Therefore, the fan noise can be reduced and the operation sound of the induction heating cooker can be reduced.

It is a perspective view which shows the whole induction heating cooking appliance which concerns on Embodiment 1. FIG. 2 is a perspective view of the main body 1 with a top plate 4 and a grill 5 removed. FIG. It is a top view of the main body 1 in a state in which the housing upper surface 3, the top plate 4, the grill 5, and the induction heating coil 11 on the right side are removed. FIG. 3 is a perspective view of a state in which the right substrate case 14, the inlet cover 18, and the chamber 12 are assembled. It is a perspective view in the state where substrate case 14 was assembled. FIG. 4 is an exploded perspective view of a substrate case 14. 4 is a perspective view of a case B component 20. FIG. FIG. 4 is a top cross-sectional view of the state in which the air inlet cover 18 and the substrate case 14 are assembled. FIG. 4 is a side cross-sectional view around the substrate case 14. It is a bottom perspective view of the induction heating cooker according to the second embodiment. 2 is a perspective view of the main body 1 with a top plate 4 and a grill 5 removed. FIG. It is a top view of the main body 1 of the state which removed the housing | casing upper surface 3, the top plate 4, the grill 5, and the induction heating coil 11 of the right side of the induction heating cooking appliance. FIG. 3 is a perspective view of a state in which the right substrate case 14, the inlet cover 18, and the chamber 12 are assembled. It is a perspective view in the state where substrate case 14 was assembled. FIG. 4 is an exploded perspective view of a substrate case 14. It is a perspective view of case D component 44. FIG. FIG. 4 is a top cross-sectional view of the state in which the air inlet cover 18 and the substrate case 14 are assembled. FIG. 4 is a side cross-sectional view around the substrate case 14. It is a bottom perspective view of the induction heating cooker according to the third embodiment. 2 is a perspective view of the main body 1 with a top plate 4 and a grill 5 removed. FIG. It is a top view of the main body 1 in a state in which the housing upper surface 3, the top plate 4, the grill 5, and the induction heating coil 11 on the right side are removed. It is a perspective view from the front center of the state which assembled the board | substrate case 14 and the chamber 12 of the right side. FIG. 4 is a perspective view from the back side surface in a state where the right substrate case 14 and the chamber 12 are assembled. FIG. 4 is an exploded perspective view of a substrate case 14. It is a perspective view of case G component 54. FIG. It is upper surface sectional drawing of the right end part of an induction heating cooking appliance. FIG. 4 is a side cross-sectional view around the substrate case 14.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Main body, 2 housing | casing, 3 housing | casing upper surface, 4 top plate, 5 grille, 6 operation part, 7 cooking unit, 8 housing | casing inlet, 9 housing | casing exhaust port, 10 intake air path, 11 induction heating coil, 12 Chamber, 13 Radiant heater, 14 Substrate case, 15 Outlet, 16 A chamber inlet, 17 B chamber inlet, 18 Inlet cover, 19 Case A component, 20 Case B component, 21 Case C component, 22 Substrate case intake Port, 23 A exhaust port, 24 B exhaust port, 25 Electronic circuit board, 26 A object to be cooled, 27 B object to be cooled, 28 Case convex part, 29 Blower casing, 30 Blower outlet, 31 Drive means support part, 32 Drive means, 33 sirocco fan, 34 shunt plate, 35 air guide plate, 36 intake chamber, 37 bottom elevation, 38 A interval, 39 B interval , 40 C interval, 41 Main body front side exhaust port, 42 Chamber inflow port, 43 Duct, 44 Case D component, 45 Case E component, 46 C exhaust port, 47 Duct exhaust port, 48 Turbo fan, 49 A cross section, 50 B cross section , 51 D exhaust port, 52 Main body front side intake port, 53 Case F component, 54 Case G component, 55 C object to be cooled, 56 D object to be cooled, 57 E object to be cooled, 58 F object to be cooled, 59 Descent from top Department.

Claims (10)

A top plate for placing an object to be heated;
A heating coil disposed below the top plate;
An electronic circuit board on which an electronic circuit for supplying current to the heating coil is mounted;
A blower for blowing cooling air;
A board case having an inlet and an outlet for the cooling air and housing the electronic circuit board;
An air chamber disposed under the heating coil and having an air outlet on an upper surface;
A diversion unit provided between a blower outlet of the blower and an object to be cooled on the electronic circuit board, and diverts the cooling air;
With
The blower includes an impeller of any one of a sirocco fan, a radial fan, and a turbo fan, a blower inlet, a blower casing, a blower outlet, and a driving means support, and a bell mouth of the blower inlet Forming at least one of the shape and the scroll shape of the blower casing integrally with the substrate case,
The substrate case has a plurality of the exhaust ports,
The air chamber is connected to each of the plurality of exhaust ports by an air passage, mixes the cooling air from the plurality of exhaust ports, and blows out from the outlet.
The diversion means is
The cooling air, the flow directing part of the exhaust port of the plurality of exhaust ports without passing through the object to be cooled on the electronic circuit board, the electronic circuit other of said through object to be cooled on the substrate induction cooker characterized by diverting to the flow leading to the exhaust port. Of the wall surface of the substrate case,
The part where the object to be cooled on the electronic circuit board is arranged inside is,
The induction heating cooker according to claim 1, wherein a convex shape is formed integrally with the substrate case toward the object to be cooled. An air guide means for guiding the cooling air to an object to be cooled on the electronic circuit board;
The air guiding means,
The induction heating cooker according to claim 1 or 2, wherein the substrate case is integrally formed between a blower outlet of the blower and an object to be cooled, between objects to be cooled, or both. . A plurality of objects to be cooled are disposed on the electronic circuit board,
The induction heating cooker according to claim 3, wherein an interval between the air guide means or the substrate case and the object to be cooled is different depending on the object to be cooled. The rotating shaft of the blower is disposed substantially parallel to the bottom surface of the casing of the induction heating cooker,
The blower casing of the blower is disposed in a portion having a narrow width in the height direction of the casing of the induction heating cooker,
The surface of the electronic circuit board is arranged substantially perpendicular to the bottom surface of the casing of the induction heating cooker and the rotation axis of the blower,
Arranged so that at least a part of the blower and the surface of the electronic circuit board overlap in the normal direction,
The object to be cooled on the electronic circuit board is arranged so as not to overlap the blower,
The blower outlet of the blower is arranged so that the blowout direction is substantially parallel to the surface of the electronic circuit board and faces the object to be cooled. Induction heating cooker. The blower includes fan driving means supported by the driving means supporting portion, and an impeller fixed to a rotation shaft of the fan driving means,
The induction heating cooker according to any one of claims 1 to 5, wherein at least one of the impeller and the fan driving means is detachably attached from an outer peripheral side of the substrate case. The electronic circuit board is disposed substantially perpendicular to the bottom surface of the casing of the induction heating cooker,
The induction heating cooker according to any one of claims 1 to 6, wherein a substrate surface on which the electronic circuit is arranged is arranged on an outer peripheral surface side of a casing of the induction heating cooker. An intake air passage that connects a case air inlet provided in the case of the induction heating cooker and an air inlet provided in the substrate case;
At least a part of the intake air passage;
The induction heating cooker according to any one of claims 1 to 7, wherein the induction heating cooker is formed of the substrate case or an outer shell of the blower. Arranging the blower on the back side in the casing of the induction heating cooker,
An intake port is arranged on the upper surface rear side of the casing of the induction heating cooker,
The induction heating cooker according to any one of claims 1 to 8 , wherein an exhaust port is disposed on a front surface and an upper back surface side of the casing of the induction heating cooker. Arranging the blower on the front side in the casing of the induction heating cooker,
An intake port is arranged on the front surface of the casing of the induction heating cooker,
The induction heating cooker according to any one of claims 1 to 8 , wherein an exhaust port is disposed on the upper surface rear side of the casing of the induction heating cooker.

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