JP5437096B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  In recent years, the spread of so-called all-electric homes, such as electrification of all home appliances, has been remarkable. As one of the representative equipment for all electrification, the spread of electromagnetic induction heating cookers that use eddy currents to heat the pan itself is remarkable.

  In this induction heating cooker, heat is generated not only from the pan but also from the induction heating coil and the control board that controls the induction heating coil. Has been done.

  In recent years, induction heating cookers tend to improve convenience, such as shortening the cooking time and selecting a material for the pan (all-metal compatible) by simultaneously finishing a plurality of cooked items at the same time. Therefore, induction heating cookers have come to be equipped with induction heating coils corresponding to higher induction heating coils and a plurality of non-magnetic metal pans. In such an induction heating cooker, the amount of heat generated by the switching element is increased, and the mounting density is expected to increase. Therefore, it is necessary to sufficiently consider cooling.

  Thus, for example, Patent Documents 1 and 2 are known as conventional techniques for efficiently cooling a heat generating inverter board, an induction heating coil, and the like.

  In the cooling technique described in Patent Document 1, a plurality of cooling fans such as a cooling fan for the left heating coil and a cooling fan for the central coil are arranged inside the main body in addition to the cooling fan for the inverter board and the right heating coil. Is. A plurality of cooling fans supply cooling air to each heating coil to ensure cooling performance.

  In the cooling technique described in Patent Document 2, an intake port is provided on the front surface of the main body, and a dedicated cooling fan is arranged for each heating coil and each inverter. Thus, cooling performance is ensured by blowing cooling air to each heating coil and each inverter.

JP 2008-59984 A JP 2009-93974 A

  By the way, when desired induction heating is performed on a non-magnetic pot (aluminum, copper, etc.), the current flowing through the induction heating coil must be increased as compared with a magnetic pot (iron pot). This is because the thermal power is proportional to the product of the square of the current flowing through the induction heating coil and the equivalent series resistance.

  In order to increase this current, it is necessary to increase the capacity of the switching element constituting the inverter. However, increasing the current increases the on-resistance loss of the switching element. Therefore, if the heating power is set high, the current of the inverter component and the heating coil increases, and the amount of heat generated according to the loss of each component also increases. Therefore, when using non-magnetic pots, it is necessary to increase the cooling air volume more than iron pots to improve cooling performance and highly efficient cooling technology.

  On the other hand, the induction heating cooker of Patent Document 1 has a general intake structure in which the opening on the top plate is the intake port of the cooling fan, and the amount of cooling air increases according to the heat power. The intake air volume to be sucked into is increased. However, Patent Document 1 does not consider cooling of the coil located away from the fan.

  Moreover, although patent document 2 shows the air path structure which provided the inlet in front of the main body, the following subject can be considered. The front position in front of the main body is an environment in which dust moves on the floor and clothes easily when the user moves during cooking. If all the cooling air necessary for cooling the inside of the main body is sucked from the opening in front of the main body, it becomes easy to suck dust generated around the kitchen when the amount of intake air is large. If dust is sucked into the main body, the narrow air passage may be clogged with dust and cause a reduction in the intake air volume. Moreover, the problem which causes the damage of an electrical component will arise because dust adheres to an inverter component. In addition, depending on the amount of intake air, since the intake port faces the user side, the user directly touches the intake air, causing the user to feel uncomfortable.

  An object of the present invention is to provide an induction heating cooker that cools an inverter board and a heating coil at a position away from a fan to reduce noise.

The above object, a first induction heating coil for induction heating an object to be heated on the top plate, and the first second induction pressurized heat coil provided near the induction heating coil, these first And an inverter board for supplying high frequency power to each of the first induction heating coil, and a first air for sucking outside air from the first opening and discharging cooling air to the first induction heating coil and the inverter board. In an induction heating cooker including a fan unit including a fan and a substrate case containing the inverter board and the fan unit, a second fan is provided in the vicinity of a second induction heating coil with respect to the substrate case. An air passage is formed by sucking outside air from the second opening provided on the front surface of the induction heating cooker by the second fan and passing through the second induction heating coil. The second fan is disposed between the first induction heating coil and the second induction heating coil, and the second air sucked from the second opening is passed through the second fan to the second fan. This is achieved by supplying cooling air to the surface of the induction heating coil.

The above object, a first induction heating coil for induction heating an object to be heated on the top plate, and the second induction heating coil provided in proximity to the first induction pressurized heat coils, these first And an inverter board for supplying high frequency power to each of the first induction heating coil, and a first air for sucking outside air from the first opening and discharging cooling air to the first induction heating coil and the inverter board. In an induction heating cooker including a fan unit including a fan and a substrate case containing the inverter board and the fan unit, a second fan is provided in the vicinity of a second induction heating coil with respect to the substrate case. An air passage is formed by sucking outside air from the second opening provided on the front surface of the induction heating cooker by the second fan and passing through the second induction heating coil. A third fan arranged near the first induction heating coil, and the third fan third opening and the surface of the first induction heating coil provided on the front surface of the induction heating cooker It arrange | positions at the communicating air path, and it achieves by supplying the external air suck | inhaled from the said 3rd opening part to the surface of the said 1st induction heating coil through the said 3rd fan as cooling air.

The above object, a first induction heating coil for induction heating an object to be heated on the top plate, and the second induction heating coil provided in proximity to the first induction pressurized heat coils, these first And an inverter board for supplying high frequency power to each of the first induction heating coil, and a first air for sucking outside air from the first opening and discharging cooling air to the first induction heating coil and the inverter board. In an induction heating cooker including a fan unit including a fan and a substrate case containing the inverter board and the fan unit, a second fan is provided in the vicinity of a second induction heating coil with respect to the substrate case. An air passage is formed by sucking outside air from the second opening provided on the front surface of the induction heating cooker by the second fan and passing through the second induction heating coil. A second fan provided with two exhaust ports is disposed between the first induction heating coil and the second induction heating coil, and the second fan has the second opening and the first The induction heating coil and the second induction heating coil are arranged in an air passage communicating with the surface of the second induction heating coil, and the outside air sucked from the opening provided in the front surface of the induction heating cooker is used as cooling air, One system is supplied to the surface of the first induction heating coil via two fans, and the other system is achieved by having a blower structure that supplies the surface to the surface of the second induction heating coil.

According to the present invention, the inverter substrate and heating coils of a position away from the fan to cool, it is possible to provide an induction heating cooker thereby reducing the noise.

It is an external appearance inclination figure of the induction heating cooking appliance provided with one Example of this invention. It is the external appearance inclined view which removed the top plate from the induction heating cooking appliance of FIG. It is the external appearance inclination figure which removed the top plate, the induction heating coil, and the front cover from the induction heating cooking appliance of FIG. It is an external appearance inclined view of the 2nd fan mounted in a present Example. It is the external appearance inclined view seen from the back surface of the coil wind tunnel mounted in a present Example. In the induction heating cooking appliance of FIG. 2, it is side surface sectional drawing cut | disconnected by the approximate center of the induction heating part of the right side seeing from the front. It is an external appearance inclination figure of the 1st fan mounted in a present Example. It is the inclination figure which decomposed | disassembled the induction heating coil and board | substrate case inside which are mounted in a present Example. It is a top view of the inverter board | substrate mounted in a present Example. It is a top view of the inverter board | substrate mounted in a present Example. It is the inclination figure which showed the air path structure under the induction heating coil mounted in a present Example. It is a longitudinal cross-sectional view of the induction heating coil mounted in a present Example. It is the top view which showed the air path structure under the induction heating coil mounted in a 2nd Example. It is the top view which showed the air path structure under the induction heating coil mounted in a present Example. It is the top view which showed the air path structure under the induction heating coil mounted in a present Example. It is the top view which showed the air path structure under the induction heating coil mounted in a present Example.

Now, the induction heating cooker was originally developed for a magnetic (iron) pan. But aluminum is that has been used when had replaced the induction pressurized heat cooker for all-electric, as described above, there is a problem that copper pan becomes unusable.

Therefore can also be used all of the metal pot in recent years, so-called all-metal support of the induction pressurized heat cooking device have been developed. However, induction pressurized heat cooker of the all-metal support and about 60% for other metal but has about 90% of the thermal efficiency with respect to iron, a very low heat efficiency.

However, common household induction heating cooker is installed induction heating cooker comprising a main right and left when viewed from the user in the housing upper surface (hereinafter, referred to as the left induction heating coil and the right induction pressurized heat coil), the central In general, an induction heating cooker with a small output is generally used. And these induction heating cooker is respectively provided with an inverter, the inverters are right induction pressurized heat coil in the conventional one fan, left induction pressurized heat coils, is to cool in the order of the central induction pressurized heat coil It was general.

  However, when trying to increase the thermal efficiency of metals other than iron, the heat generation of the coil in the housing becomes higher and the problem of noise arises because it is necessary to increase the rotational speed of the fan. Moreover, since the left induction heating coil is cooled by the cooling air heated by the cooling of the right induction heating coil, there is a problem that sufficient cooling cannot be performed.

  Accordingly, the inventors of the present invention have considered that a fan for the left induction heating coil is newly installed, and as a result, not only can the cooling effect of the left induction heating coil be improved, but also induction that can reduce noise. A cooking device could be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In the present embodiment, an induction heating cooker including three induction heating units and one grill and used by being incorporated in kitchen furniture such as a system kitchen will be described as an example. Further, in this embodiment, of the three induction heating units, the left and right two stoves are set as non-magnetic compatible heating coils.

First, the whole structure of the induction heating cooker in one Example of this invention is demonstrated.
FIG. 1 is an external inclination view of the induction heating cooker provided with the first embodiment.
In addition, it is the figure which showed the typical structure common to the induction heating cooking appliance concerning this invention, and the conventional induction heating cooking appliance.

In FIG. 1, the top plate 1 is provided on the upper surface of the main body 2 and is made of glass and receives a load such as a pan. An operation unit 3 is provided on the front surface of the main body 2, and a grill 4 is provided next to the operation unit 3. A liquid crystal panel 5 is arranged in front of the top surface of the main body 2 and on the front side of the top plate 1, and the output state of the induction heating unit is displayed in liquid crystal, and the strength of the heating output is transmitted to the user. Reference numeral 26 denotes an outside air intake port located on the right induction heating coil side. 33 denotes an exhaust port wind finished cooling the lateral side induction heating coil and the left induction pressurized heat coil is discharged.

FIG. 2 is an inclined view of the induction heating cooker of the present embodiment in which the top plate is removed from the main body and the induction heating coil is separated.
FIG. 3 is an inclined view with the top plate, the induction heating coil, and the front cover 11 removed.
2 and 3, at the bottom of the top plate 1, an induction heating coil 6 corresponding to the right induction heating unit, an induction heating coil 7 corresponding to the left induction heating unit, and an induction heating corresponding to the central rear heating unit are provided. A coil 8 is attached. These coils generate magnetic lines of force when a high-frequency current flows, and heat the pot as a load. Below the induction heating coil 6 on the right, a substrate case 9 containing an electronic substrate for controlling each induction heating coil and a first fan for supplying cooling air to the electronic substrate and the induction heating coil is disposed. Behind the left induction heating coil 7 is disposed a power supply substrate 10 and the like that could not be stored in the substrate case 9.

  As shown in FIG. 3, a second fan 12 that supplies cooling air to the induction heating coil 7 is disposed on the left side surface of the main body between the left induction heating coil 7 and the front cover 11. As shown in FIG. 2, the front cover 11 is provided with an opening 13, which serves as an intake port through which the second fan 12 sucks outside air.

  In the present embodiment, in order to suppress the suction resistance of the second fan 12, it is desirable to be near the second fan 12 so that the wind tunnel length is as short as possible. However, the position of the opening 13 is not particularly limited as long as it is in front of the main body 2 below the top plate 1, and may be disposed on the right side of the front cover 11.

FIG. 4 is an external inclination view of the second fan 12.
In the present embodiment, an example in which the second fan is a sirocco fan will be described. However, the fan is not necessarily limited to a sirocco fan, and a propeller fan or a turbo can be used as long as it can supply a cooling air amount necessary for the induction heating coil 7. It may be a fan.

  In FIG. 4, the opening 13 shown in FIG. 2 and the suction port 12 a of the second fan 12 are connected by the intake air tunnel 14 shown in FIG. 3, and the cooling air passing under the top plate 1 is applied to the second fan 12. An independent air passage is formed to prevent inhalation. A coil wind tunnel 15 is disposed below the induction heating coil 7. Reference numeral 12b denotes a discharge port.

FIG. 5 is an external inclination view of the coil wind tunnel 15 as viewed from the back side.
In FIG. 5, the coil wind tunnel 15 is provided with a coil air outlet 16 for supplying cooling air from the second fan 12 to the air vent 7a opened at the center of the induction heating coil 7 shown in FIG. . Around the coil outlet 16, a jet port 17 having a plurality of openings is provided. A coil blowing wind tunnel 18 is provided on the back surface of the coil wind tunnel 15 to supply the cooling air blown from the second fan 12 to the coil blower outlet 16 shown in FIG. 3 and partition the cooling wind from the substrate case 9. In addition, a partition plate 19 is provided for communicating the first fan with the central induction heating coil 8 and the power supply substrate 10.

FIG. 6 is a side cross-sectional view of the induction heating cooker of FIG. 2 cut at substantially the center of the induction heating unit.
FIG. 7 is an inclined view showing the appearance of the first fan.
6 and 7, a first fan 21 including a turbo fan (fan 20) is provided at the back of the substrate case 9, and cooling air is blown by the fan 20 driven by the motor 22. The first fan 21 that houses the fan 20 includes an intake port 23 and discharge ports 24a to 24d having four openings. In the present embodiment, the discharge port 24 is described as four openings, but any number of openings may be provided according to the cooling of the electronic substrate or the induction heating coil.

  In addition, the turbo fan (fan 13) described in the present embodiment has a relationship that the fan outer diameter and the fan inner diameter have an inner diameter / outer diameter of 0.4 to 0.6. Further, the exit angle of the blades is 110 degrees or less, and the number of blades is 15 or less.

  Inverter boards corresponding to the induction heating coils are stacked on the front side of the first fan 21 inside the board case 9 shown in FIGS. In the present embodiment, the inverter board 25a corresponding to the right induction heating coil 6 is the lowermost stage in the substrate case 9, the inverter board 25b corresponding to the central induction heating coil 8 is the second stage, and the left induction heating coil. 7 is configured such that the inverter board 25c corresponding to 7 is arranged in the uppermost stage.

  Next, the flow of the cooling air will be described. The air inlet 26 of the main body 2 is provided on the right side of the rear portion of the main body 2 and is an inlet for the cooling air inside the main body 2. The cooling air sucked from the air inlet 26 is guided to the air inlet 23 of the first fan.

  The first fan 21 blows out air taken in from the suction port 23 as cooling air from the discharge ports 24a to 24d. The cooling air blown from the first fan 21 cools the inverter boards 25a to 25c and each induction heating coil described later.

FIG. 8 is an exploded perspective view of the inside of the right induction heating coil 6 and the substrate case 9.
FIG. 9 is a plan view of the inverter board 25a.
FIG. 10 is a plan view of the inverter board 25b.
In addition, the arrow in a figure represents the cooling air.
8 to 10, heat dissipation fins are provided for those having a large circuit loss such as switching elements constituting the inverter. The arrangement configuration of the heat dissipating fins on the inverter board 25a will be described.

  A plurality of heat dissipating fins 26 a shown in FIG. 9 are used according to the number of switching elements and the amount of heat generation, and they are concentrated on one side close to the first fan 21. The heat radiation fin 26a is covered with a wind tunnel 27a connected to the discharge port 24a (shown in FIG. 7) of the first fan 21. In addition to the radiation fins 26a, circuit components such as an electrolytic capacitor and a resonance capacitor are arranged on the inverter board 25a, and the cooling air from the fan cools the switching element having a large heat generation amount on the inverter board first. ing. The other inverter board has the same configuration, and the inverter board 25b is connected to the wind tunnel 27b covering the heat radiation fin 26b and the discharge port 24b (shown in FIG. 7) of the first fan 21 as shown in FIG. Is connected to a wind tunnel 27c covering the heat radiation fin 26c and a discharge port 24c (shown in FIG. 7) of the first fan 21.

  The air flow sucked into the first fan 21 shown in FIG. 6 and FIG. 7 is given momentum by the fan 20 having the backward-facing blades specific to the turbofan driven by the first fan 21. The air flow given the momentum deflects the flow of 90 degrees in the fan 20, and then further deflects in the direction of the flow of 90 degrees inside the first fan 21, and the discharge port 24a shown in FIG. 7 has an inverter 25a and a discharge port 24b. The inverter 25b, the discharge port 24c are discharged to the inverter 25c, and the discharge port 24d is discharged to each induction heating coil. The directions of the suction port 23 and the discharge ports 24 a to 24 d are arranged in a direction that coincides with the axial direction of the fan 20.

  Cooling air is supplied from the discharge port 24a of the first fan 21 to the radiation fins 26a of the inverter board 25a through the wind tunnel 27a. Part of the air that has passed through the heat radiation fins 26a is reversed to the first fan 21 side on the front side wall surface of the substrate case 9, and is guided to the upper surface of the inverter substrate 25c. Part of the air that has passed through the heat radiation fins 26a passes through the gap between the wall surfaces on the front side of the inverter board 25b and the board case 9, flows on the inverter board 25b, and is guided to the first fan 21 side. The cooling air that has flowed over the inverter 25c passes through the opening 28 at the top of the substrate case 9 and passes through the jet port 30 formed of a plurality of ventilation holes provided in the wind tunnel casing 29 under the right induction heating coil 6 to be induction heated. Cooling air is blown on the back of the coil.

  Cooling air is supplied from the discharge port 24b of the first fan 21 to the heat radiation fins 26b of the inverter board 25b through the wind tunnel 27b. The cooling air that has passed through the heat dissipating fins 26b is reversed to the first fan 21 side on the front side wall surface of the substrate case 9 and guided onto the inverter substrate 25c, and the cooling air is blown onto the back surface of the induction heating coil 6 in the same manner as described above. Cooling air is supplied from the discharge port 24c of the first fan 21 shown in FIG. 7 to the radiation fins 26c of the inverter board 25c through the wind tunnel 27c. The cooling air that has passed through the radiation fins 26 c passes through the jet port 30 through the opening 28 of the substrate case, and blows the cooling air to the back surface of the induction heating coil 6.

Next, the flow of the cooling air supplied to the induction heating coil will be described with reference to FIGS.
FIG. 11 is an inclined view showing an air path structure under the induction heating coil provided with the present embodiment.
FIG. 12 is a longitudinal sectional view of the induction heating coil 6.
11 and 12, the cooling air supplied from the discharge port 24d of the first fan 21 to the wind tunnel casing 29 on the substrate case 9 is supplied to the coil air outlet 31 that is an opening of the wind tunnel casing 29, and induction heating is performed. It passes through the vent 6a provided in the center of the coil 6 and is led to the gap between the top plate 1 and the coil 6b to cool the surface of the coil 6b. As described above, the cooling of the back surface of the coil 6b is performed by cooling the inverter board inside the board case 9 and colliding with the cooling air blown up from the jet port 30. The cooling air passages on the front and back surfaces of the coil 6b collide with the front and back surfaces of the coil 6b by increasing the air velocity of the cooling air by abruptly reducing the air passage area like the gap between the jet port 30 and the top plate 1. I am letting. By this method, even if the air volume is small, high heat transfer performance can be obtained by blowing high-speed air, and the coil 6b can be cooled efficiently with a low air volume.

  In addition, a part of the cooling air supplied from the discharge port 24 d of the first fan 21 to the wind tunnel casing 29 on the substrate case 9 is centralized along the partition plate 19 of the coil wind tunnel 15 from the opening 32 of the wind tunnel casing 29. It flows to the induction heating coil 8 and the power supply substrate 10 to cool them. The air that has cooled each induction heating coil and the inverter board passes through the exhaust port 33 that is opened on the rear left side of the top plate 1 and is discharged outside the main body 2.

  By driving the second fan 12, outside air is sucked from the opening 13 of the front cover 11, passes through the intake wind tunnel 14, and the cooling air is supplied to the coil blowing wind tunnel 18 of the coil wind tunnel 15 by the second fan 12. The cooling air flowing through the coil blowing wind tunnel 18 blows up from the coil air outlet 16 through the vent 7a of the induction heating coil 7 shown in FIG. 2, and is led to the gap between the top plate 1 and the coil 7b to cool the surface of the coil 7b. .

  Each inverter board of the board case 9 is cooled, and a part of the cooling air blown up from the opening 28 and the cooling air blown up from the opening 33 provided in the upper front part of the board case 9 flow into the coil wind tunnel 15. The cooling air is collided with the back surface of the induction heating coil 7 to be cooled by blowing up from the jet port 17.

  When the outside air temperature is set to 30 degrees, the air that has cooled the heat generating portion such as the inverter board is heated to about 60 degrees, and compared to the induction heating coil that is blown with such hot air, the coil surface alone Cooling with better heat transfer performance is possible by blowing low temperature outside air. The air blown from the discharge port 24d of the first fan 21 to the induction heating coil 6 side can supply air substantially equal to the outside air temperature because the distance of the wind tunnel is short. For example, when cooling air from the discharge port 24d is to be supplied to the surface of the induction heating coil 7 on the left side, the wind tunnel becomes longer and the influence of the hot air of about 60 degrees extending inside the main body 2 and the radiant heat of the induction heating coil, etc. When the induction heating coil 7 arrives, the cooling air is warmed by about 10 degrees from the outside air temperature. Therefore, the cooling air temperature is higher than that of the right induction heating coil 6, so that the cooling performance is lowered.

  However, according to this embodiment, both the left and right induction heating coils can be configured with short cooling air paths, so that air equivalent to the outside air temperature sucked from the outside of the main body 2 can be supplied to the gap between the top plate 1 and the coil surface. Both induction heating coils can be cooled by blowing low-temperature cooling air at high speed, so that high cooling performance can be obtained.

  Further, in the cooling method of the induction heating coil 7, the surface of the coil is used as cooling air from the second fan, and the substrate case passing air is supplied to the back surface of the coil, so that the cooling air volume of the second fan 21 is reduced only on the coil surface. Since the air volume can be suppressed, the operation noise of the second fan can be reduced.

  Also, a cooling structure in which a first fan that cools an inverter board, a right heating coil, and the like with an intake port disposed behind the top plate, and a second fan for cooling the left heating coil, which has an intake port disposed in front of the main body, By doing so, the intake air volume of the top plate can be reduced by the cooling air volume for the left heating coil. As a result, the suction force of the intake port can be reduced, so that steam or oil mist generated during cooking is hardly sucked into the main body. By preventing steam and oil mist from entering the main body, the inverter component can be prevented from being damaged, and a highly reliable induction heating cooker can be provided. Further, since the suction force of the top plate intake port is reduced, it becomes difficult for oil mist or the like attached to the intake port to adhere to the air, so that the intake port can be easily kept clean.

  The operation in the configuration of the present embodiment will be described. A pan is placed on the left and right induction heating units, that is, on the top plate 1 above the right and left induction heating coils 6 and 7, and the power switch of the operation unit 3 is turned on. Is turned on, and the liquid crystal panel 5 adjusts the output adjustment corresponding to the right and left induction heating sections to the desired output.

  The control units of the inverter board 25a and the inverter board 25c flow high-frequency current through the induction heating coils 6 and 7 to generate magnetic lines of force from the induction heating coils to heat the pot. At the same time, the controller drives the first fan 21 and the second fan 12. The driven first fan 21 sucks outside air from the air inlet 26, and the second fan 12 sucks outside air from the opening 13 and blows cooling air to the inverter board and each induction heating coil to cool. Thereafter, the air is exhausted from the exhaust port 33 provided at the rear portion of the main body 2 to the outside air.

  Compared to the configuration in which the heat generating part inside the main body is cooled only by the first fan 21, the air volume is reduced by suppressing the rotation speed of the main first fan that cools the inverter board and the right induction heating coil as in this embodiment. Therefore, even if the cooling fan for the left induction heating coil with a small amount of cooling air is used in combination, a noise reduction effect can be obtained.

  Moreover, in the case of the operation | movement which does not use the induction heating part of the left side, by setting it as the control which stopped the 2nd fan 12, the driving | operation of a cooling fan becomes a main 1st fan and the effect which can further reduce the operating noise of a cooling fan is effective. can get.

A second embodiment of the present invention will be described with reference to FIG.
FIG. 13 is a plan view for explaining the air path structure under the induction heating coil provided with the present embodiment.
In the present embodiment, the cooling structure inside the substrate case 9 will be described using the same configuration as in the first embodiment.
In the present embodiment, the second fan 12 is arranged in the vicinity of the front center of the main body 2 and incorporated in the coil wind tunnel 15. The opening 13 of the front cover 11 will be described using an example in which the opening 13 is opened near the second fan 12.

  In FIG. 13, the second fan 12 and the opening 13 are connected by an intake air tunnel 34 and are configured to be blocked from the cooling air flowing inside the main body 2. The second fan 12 and the coil blower outlet 16 are connected by a coil blowout wind tunnel 35, and the cooling air discharged from the second fan 12 is passed through the coil blower outlet 16 through the gap between the induction heating coil 7 and the top plate 1. To supply.

Here, the flow of the cooling air of the induction heating coil 7 in which the second fan 12 is disposed near the front center of the main body 2 will be described.
By driving the second fan 12, the outside air is sucked from the opening 13 of the front cover 11 through the intake air tunnel 34, the cooling air is discharged to the coil blowing wind tunnel 35, and the coil blower outlet 16 enters the ventilation hole 7 a of the induction heating coil 7. Supply and spray on the surface of the top plate 1 and the coil 7b to cool the coil surface. The cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 33 provided in the upper part of the board case 9 and flows into the coil wind tunnel 15 to be jetted upward from the jet port 17. The back surface of the induction heating coil 7 is cooled.

  According to the present embodiment, since the amount of intake air from the top plate intake port can be reduced as in the first embodiment, the effect of preventing steam and oil mist generated during cooking from entering the main body can be obtained. And preventing the inverter board from being damaged. Moreover, the induction heating cooker which reduced the operating noise can be provided by taking the control which stopped the 2nd fan when the combined operation of the 2nd fan and the left induction heating part are not used also about noise.

A third embodiment of the present invention will be described with reference to FIG.
FIG. 14 is a plan view for explaining the air path structure under the induction heating coil provided with this embodiment.
In the present embodiment, the cooling structure inside the substrate case 9 uses the same configuration as that of the first embodiment, and a configuration example in which the power supply substrate is not disposed behind the induction heating coil 7 will be described. The second fan 12 was arranged behind the induction heating coil 7.

  In FIG. 14, the opening part 13 of the front cover 11 is demonstrated in the example arrange | positioned on the front left side surface. The second fan 12 and the opening 13 are connected by an intake wind tunnel 36 and are configured to be blocked from the cooling air flowing inside the main body 2. The second fan 12 and the coil blower outlet 16 are connected by a coil blowout wind tunnel 37, and the cooling air discharged from the second fan is passed through the coil blower outlet 16 to the air path in the gap between the induction heating coil 7 and the top plate 1. Supply.

  Here, the flow of the cooling air of the induction heating coil 7 in which the second fan 12 is arranged in the left rear space of the main body 2 will be described.

  By driving the second fan 12, the outside air is sucked from the opening 13 of the front cover 11 through the intake air tunnel 36, the cooling air is discharged to the coil blowing wind tunnel 37, and the coil blowing port 16 enters the ventilation hole 7 a of the induction heating coil 7. Supply and spray on the surface of the top plate 1 and the coil 7b to cool the coil surface. The cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 33 provided in the upper part of the board case 9 and flows into the coil wind tunnel 15 to be jetted upward from the jet port 17. The back surface of the induction heating coil 7 is cooled.

  In this embodiment, the same effect as that of the second embodiment can be obtained.

A fourth embodiment of the present invention will be described with reference to FIG.
FIG. 15 is a plan view for explaining the air path structure under the induction heating coil provided with the present embodiment.
In this embodiment, the discharge port 24d of the first fan 21 is closed, and the inverter board cooling structure inside the board case 9 will be described as the same structure as that of the first embodiment. The second fan 12 is arranged in the vicinity of the induction heating coil 7 and the third fan 38 is newly arranged in the vicinity of the induction heating coil 6.

  In FIG. 15, the opening 13 of the front cover 11 is provided with an opening near the second fan 12, and the opening 39 is provided in the front cover 11 near the third fan 38. The second fan 12 and the opening 13 are connected by an intake air tunnel 14 and are configured to be blocked from cooling air flowing inside the main body 2. The second fan 12 and the coil blower outlet 16 are connected by a coil blowout wind tunnel 18, and the cooling air discharged from the second fan 12 is blown from the coil blower outlet 16 to the gap between the induction heating coil 7 and the top plate 1. To supply.

  The third fan 38 and the opening 39 are connected by an intake air tunnel 40 and are configured to be blocked from cooling air flowing inside the main body 2. The third fan 38 and the coil air outlet 31 are connected by a coil air outlet 41 provided inside the casing wind tunnel 29, and the cooling air discharged from the third fan 38 is connected to the induction heating coil 6 and the top from the coil air outlet 31. Supply to the air path in the gap with the plate 1.

  Here, the flow of the cooling air of the induction heating coils 6 and 7 in which the second fan 12 and the third fan 38 are arranged will be described.

  By driving the second fan 12, the outside air is sucked from the opening 13 of the front cover 11 through the intake wind tunnel 14, the cooling air is discharged to the coil blowing wind tunnel 18, and the coil blower outlet 16 enters the ventilation hole 7 a of the induction heating coil 7. Supply and spray on the surface of the top plate 1 and the coil 7b to cool the coil surface. The cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 33 provided in the upper part of the board case 9 and flows into the coil wind tunnel 15 to be jetted upward from the jet port 17. The back surface of the induction heating coil 7 is cooled.

  By driving the third fan 38, outside air is sucked from the opening 39 of the front cover 11 through the intake wind tunnel 40, the cooling air is discharged to the coil blowing wind tunnel 41, and the coil blowing port 31 enters the ventilation hole 6 a of the induction heating coil 6. Supply and spray on the surface of the top plate 1 and the coil 6b to cool the coil surface. The cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 28 provided in the upper part of the board case 9 and is jetted upward from the jet port 30 to cool the back surface of the induction heating coil 6. To do.

  When the left and right induction heating units are used, the first fan, the second fan, and the third fan are driven. When the right and center induction heating units are used, the second fan is stopped and the first fan and the third fan are operated.

  By adopting a cooling structure that sucks the cooling air on the left and right induction heating coil surfaces from the front of the main body as in this embodiment, the amount of intake air that the first fan sucks into the main body from the air inlet on the top of the top plate is significantly reduced. Steam or oil mist generated during cooking is less likely to be sucked into the top plate inlet. For this reason, since the invasion of steam or oil mist into the main body can be suppressed, damage can be prevented without foreign matter adhering to the inverter board or the like, so that the reliability of the electric system can be improved. In addition, since oil mist can be prevented from adhering to the periphery of the intake port, the periphery of the intake port can be kept clean.

A fifth embodiment of the present invention will be described with reference to FIG.
FIG. 16 is a plan view for explaining an air path structure under the induction heating coil provided with this embodiment.
In this embodiment, the discharge port 24d of the first fan 21 is closed, and the inverter board cooling structure inside the board case 9 will be described as the same structure as that of the first embodiment.
The second fan 42 is arranged between the induction heating coil 6 and the induction heating coil 7, and the second fan 42 has a structure in which a discharge port having two exhaust systems is provided.

  In FIG. 16, the opening 13 of the front cover 11 has an opening at a position close to the second fan 42. The second fan 42 and the opening 13 are connected by an intake air tunnel 43 and are configured to be blocked from the cooling air flowing inside the main body 2. One system of the discharge port of the second fan 21 is connected by a coil blowing wind tunnel 44 so as to communicate with the coil air outlet 16, and the other system is connected to the coil air outlet 31 by a coil blowing wind tunnel 45. Are linked together.

  The cooling air blown from the coil blower outlet 16 is supplied to the air path in the gap between the induction heating coil 7 and the top plate 1 to cool the coil surface. The cooling air blown out from the coil outlet 31 is supplied to the air path in the gap between the induction heating coil 6 and the top plate 1 to cool the coil surface.

The cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 33 provided in the upper part of the board case 9 and flows into the coil wind tunnel 15 to be jetted upward from the jet port 17. The back surface of the induction heating coil 7 is cooled.
Further, the cooling air that has cooled the inverter board inside the board case 9 by the first fan 21 blows up from the opening 28 provided in the upper part of the board case 9, and is jetted upward from the jet port 30 to be back of the induction heating coil 7. Cool down.

  When the left and right induction heating units are used, both the first fan and the second fan are driven, and even when the right and center induction heating units are used, the first fan and the second fan are operated.

  In this embodiment, as in the fourth embodiment, the amount of intake air sucked into the main body from the top plate air inlet can be greatly reduced to prevent steam and oil mist from entering the main body. A cooking device can be provided. In addition, since the oil mist adhering to the periphery of the intake port can be suppressed, the cleanliness of the top plate can be maintained for a long time.

For example, when the maximum cooling airflow when using the iron pan is 1.4 m ³ / min, the noise when the total airflow is supplied only by the first fan 21 is 38 dB. Here, when the first fan and the second fan were used together as in the present embodiment, the first fan 1.17 m ³ / min and the second fan 0.23 m ³ / min were appropriate. Fan operating noise was 32.9dB for the first fan and 33.1dB for the second fan, but the total noise of both fans was L = 10log (10 ^ (32.9 / 10) + 10 ^ (33.1 / 10)) ° = 36.1dB Next. As a result, a noise reduction of -1.9 dB can be achieved by using the second fan together.
The same noise reduction effect can be achieved when using an aluminum pan.

  As described above, according to the present invention, the cooling fan can be arranged in the vicinity of the left and right induction heating coils, and the air path from the fan to the induction heating coil can be arranged short. Since it can supply to an induction heating coil, the improvement effect of the cooling performance of an induction heating coil is acquired.

  Further, since the air volume of the main cooling fan that cools the inverter board, the right side heating coil, and the like can be suppressed, a noise reduction effect can be obtained when the cooling fan for the left heating coil with a small cooling air volume is operated in combination.

  In addition, when the left stove is not used, the second fan for the left heating coil is controlled so that the cooling fan is operated as the main cooling fan, and the total cooling air volume supplied to the main body can be reduced. An induction heating cooker with low noise can be provided by providing a blowing structure using two fans in combination.

  On the other hand, the fan inlet is located at the rear of the top plate, the air passage system that mainly cools the inverter board and right heating coil, and the second fan inlet are located in front of the main body, and the left heating coil surface is cooled. The cooling structure that combines the two air paths consisting of the two air paths can reduce the amount of cooling air sucked from the top plate inlet by the amount of cooling air for the left heating coil. Can weaken power.

  For this reason, the effect which prevents the penetration | invasion inside a main body is acquired. As a result, it is possible to provide a highly reliable induction heating cooker that can prevent damage to the inverter components. In addition, since the suction force of the top plate intake port is reduced, it is possible to prevent dirt such as oil mist adhering to the intake port from being cleaned.

  DESCRIPTION OF SYMBOLS 1 ... Top plate, 2 ... Main body, 6, 7, 8 ... Induction heating coil, 9 ... Substrate case, 11 ... Front cover, 12 ... 2nd fan, 13 ... Opening part, 14 ... Intake wind tunnel, 15 ... Coil wind tunnel, 21 ... First fan.

Claims (5)

A first induction heating coil for induction heating an object to be heated on the top plate, and the first second induction pressurized heat coil provided near the induction heating coil, the induction of these first and second A fan comprising: an inverter board that supplies high-frequency power to each of the heating coils; and a first fan that sucks outside air from the first opening and discharges cooling air to the first induction heating coil and the inverter board. In an induction heating cooker comprising a unit and a substrate case containing the inverter substrate and the fan unit,
A second fan is provided in the vicinity of the second induction heating coil with respect to the substrate case, and the second fan sucks outside air from a second opening provided in the front surface of the induction heating cooker. An air path that passes through the induction heating coil 2 is formed,
The second fan is disposed between the first induction heating coil and the second induction heating coil, and outside air sucked from the second opening is passed through the second fan to the second fan. An induction heating cooker characterized by supplying cooling air to the surface of the induction heating coil. A first induction heating coil for induction heating an object to be heated on the top plate, and the first second induction heating coil induction provided close to the pressure heat coils, induction of these first and second A fan comprising: an inverter board that supplies high-frequency power to each of the heating coils; and a first fan that sucks outside air from the first opening and discharges cooling air to the first induction heating coil and the inverter board. In an induction heating cooker comprising a unit and a substrate case containing the inverter substrate and the fan unit,
A second fan is provided in the vicinity of the second induction heating coil with respect to the substrate case, and the second fan sucks outside air from a second opening provided in the front surface of the induction heating cooker. An air path that passes through the induction heating coil 2 is formed,
A third fan is disposed in the vicinity of the first induction heating coil, and the third fan third opening and the surface of the first induction heating coil provided on the front surface of the induction heating cooker It is arranged in the air passage that communicated with
An induction heating cooker, wherein the outside air sucked from the third opening is supplied as cooling air to the surface of the first induction heating coil through the third fan. A first induction heating coil for induction heating an object to be heated on the top plate, and the first second induction heating coil induction provided close to the pressure heat coils, induction of these first and second A fan comprising: an inverter board that supplies high-frequency power to each of the heating coils; and a first fan that sucks outside air from the first opening and discharges cooling air to the first induction heating coil and the inverter board. In an induction heating cooker comprising a unit and a substrate case containing the inverter substrate and the fan unit,
A second fan is provided in the vicinity of the second induction heating coil with respect to the substrate case, and the second fan sucks outside air from a second opening provided in the front surface of the induction heating cooker. An air path that passes through the induction heating coil 2 is formed,
A second fan having two exhaust ports provided between the first induction heating coil and the second induction heating coil is disposed, and the second fan includes the second opening and the second 1 is arranged in an air path communicating with the induction heating coil and the surface of the second induction heating coil,
One system supplies the outside air sucked from the second opening as cooling air to the surface of the first induction heating coil via the second fan, and the other system supplies the second induction heating coil. An induction heating cooker having a blower structure for supplying to the surface. In the induction heating cooking appliance according to any one of claims 1 to 3 ,
The induction heating cooker, wherein the substrate case is provided below the first induction heating coil. In the induction heating cooking appliance according to any one of claims 1 to 3 ,
An induction heating cooker characterized in that an air passage for cooling the first induction heating coil by cooling air from the first fan and an air passage by the second fan are independent of each other.

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