JPH042085A - Cooking apparatus with heater - Google Patents

Abstract

PURPOSE:To cool a heat emitting component even when an oven is in service and enable stable use of induction heating by furnishing a blower fan and a wind duct in the oven, and inhaling the exhaust air given out of a spout hole to the wind duct from an aux. suction hole. CONSTITUTION:When heating is started by an operational part 3, a control circuit 25 drives an induction heating coil 8 or a heater 22. A heat sink 18 on which a switching element 19 as a heat emitting component is mounted, is cooled by the wind from a main suction hole 16 generated by a cooling fan 17. If therein an oven situated below 10 is in service, hot air is exhausted from the exhaust hole 11 being willing to be included in the suction air for the fan 17. Now a blower fan 12 inhales the exhaust air from an aux. suction hole 14, and it is allowed to pass through a wind duct 13 to prevent the exhaust air from the oven 10 to be included in the suction air for the fan 17. Whereby the heat emitting component can be cooled even when the oven is in service, and stable induction heating can be made.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a cooking device using induction heating.

BACKGROUND OF THE INVENTION In recent years, there has been a demand for induction heating cookers with high output in order to improve cooking performance. This demand has become particularly strong when induction heating is used as a heating means for a cooking device built into kitchen furniture such as a system kitchen.

Induction heating cookers require a control circuit to operate, and the circuit includes heat-generating components such as switching elements. Increasing the output does not mean increasing the amount of heat generated by these heat-generating components, so it has become necessary to further improve the cooling performance of the heat-generating components.

In addition, it is increasingly being installed on top of an oven.

Hereinafter, the configuration of a conventional induction heating cooker will be described with reference to FIG. 6.

In the figure, reference numeral 1 denotes a lower unit, which has an intake port 2 on the front and an operation section 3 above it. 4 is an upper unit, which is attached to the opening of the top plate 5 of the kitchen furniture. The lower unit 1 and the upper unit 4 constitute a cooking device main body 6. A heat-resistant cooking plate 7 is provided on the upper surface of the upper unit 4, and a plurality of induction heating coils 8a are provided below.

8b is provided. Reference numeral 9 denotes an exhaust louver that exhausts the entire air. 10 is the oven, and the oven exhaust port 1 is on the top.
1.

When driving the induction heating coils 8a and 8b of the cooking device main body 6, it is necessary to cool heat-generating components such as switching elements in the control circuit. Air is sucked in through the mouth 2, cooling air is applied to the heat-generating parts, and the air is exhausted through the exhaust louver 9.

Problems to be Solved by the Invention However, in the conventional configuration described above, the hot air discharged from the oven exhaust port 11 when the oven 1° is used is not drawn in from the air intake port when cooling the inside of the cooking device main body 6, and the cooling air is This had the problem of significantly raising the temperature of the air, reducing cooling performance, and making induction heating unusable.

The present invention solves the above-mentioned problems, and enables stable induction heating without reducing the cooling performance of the cooker body when using an oven, and does not make the user feel uncomfortable during exhaust processing. The primary purpose is to provide equipment.

A second purpose is to provide a heating cooker at a low cost in addition to the first purpose.

Means for Solving the Problems In order to achieve the above object, the first technical means of the present invention is to install a cooling fan that cools the invented components in the control circuit, and connect the inlet of the cooling fan to the main inlet. A sub-intake port is provided below the main inlet port, and a blower fan is provided to suck air from the sub-intake port.

In addition, the second technical means is to provide a sub-intake port below the main intake port, and then separate the main intake port and the sub-intake port to communicate with the intake side of the cooling fan, so that the sub-intake port The heat-generating parts are removed from the exhaust path of the cooling fan, which corresponds to the intake air.

Operation The present invention has the above-mentioned configuration, and by the first technical means,
Since the sub-intake port is provided below the main intake port, when the oven is used in the lower part, the exhaust air from the oven is sucked in by the fan from the sub-intake port before entering through the main intake port of the cooker, resulting in cooling air. Hot exhaust air from the oven does not get mixed in, and the cooling performance of heat-generating parts does not deteriorate.

In addition, with the second technical means, a sub-intake port is provided below the main intake port, so when the oven is in use, the exhaust air from the oven is sucked in by the cooling fan from the sub-intake port before entering through the main intake port of the cooking device. However, since there are no heat-generating parts on the exhaust side corresponding to the sub-intake port, the hot exhaust air from the oven is not used for cooling, and the cooling performance of the heat-generating parts does not deteriorate. Moreover, since the cooling fan also serves as a measure for exhausting the oven, there is no need to install a new blower fan.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Components that are the same as those in the prior art example are designated by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows a first embodiment of the present invention. In the figure, reference numeral 12 denotes a blower fan, which is provided at the rear of the lower unit 1. As shown in FIG. An air passage 13 configured under the bottom surface of the lower unit 1 has one end connected to the inlet of the air blowing fan 12 and the other end connected to the sub-intake port 14 on the front surface. Further, a sub-intake louver 16 is attached to the sub-intake 14 for sucking in exhaust gas from the oven diagonally downward. A main intake port 16 is provided above the sub-intake port 14, and a cooling fan 17 is provided.
Air is taken in from this main intake port 16. The cooling fan 17 is fixed to the bottom surface of the lower unit 1. A duct) 17a is attached to this cooling fan 17, and further behind this duct 17a is a heat sink 18 with a switching element 19 attached in the center.
has been established. This heat sink 18 is attached to the bottom surface of the lower unit 1 via a fixing plate 20.

Reference numeral 21 denotes an opening in the top plate of the kitchen furniture, into which the upper unit 4 is mounted and held from above. Bottom plate 24 of upper unit 4
Inside is a coil cooling fan 23 for cooling the induction heating coils sa and Bb along with the induction heating coils 8a and 8b, and further holds a heater 22 made of nichrome wire to form the casing of the upper unit 4. are doing. Inside the lower unit 1 of the cooker main body 6, there is a control circuit 26 that drives the induction heating coils Ba, Bb, the heater 22, and the coil cooling fan 23, a switching element 19 which is a part of the heat generating component, and A cooling fan 17 for cooling the control circuit 25 and a heating chamber 26 such as a roaster are installed. 27 is an intake part of the upper unit 4, which communicates with an exhaust part 29 provided at the rear of the upper unit 4;
Final exhaustion between this exhaust section 29 and an exhaust section 28 provided at the rear of the upper part of the lower unit 1 is performed through the exhaust louver 9. Note that 30 is the cooking pot, and 31 is the upper unit 4.
This is wiring that electrically connects the lower unit 1 and the lower unit 1.

The operation of the heating cooker configured as above will be described below.

When cooking, when a pot or the like is placed on the heating section of the cooking plate 7 and operated from the operation section 3 to heat it, the control circuit 26 turns on the induction heating coils 8a, 8 according to the setting.
b or the heater 22 is driven. At this time, in the case of induction heating, it is necessary to cool the switching element 19, which is a heat generating component of the control circuit 26. The air is sucked in as shown in a to cool the heat sink 18, and exhausted as shown in the arrow.

At this time, if oven 10 is used, oven exhaust port 1
Hot air is exhausted from the oven 10 and tries to mix with the intake air of the cooling fan 17, but the blower fan 12 blows the hot exhaust air from the oven 10 through the air passage 13 as shown by arrows c and d and from the sub-intake port 14 as shown by arrow e. It can be sucked into the oven at 1o.
The exhaust air of the cooling fan 17 is not mixed into the intake air of the cooling fan 17, and
This does not reduce the cooling performance of heat-generating components.

Therefore, induction heating can be stably used even when the oven 10 is used. In addition, the blower fan 12
Since the exhaust air from the oven 1o is taken in by the oven 1o, there is an effect that the user does not feel any discomfort between the exhaust air and the cold air.

In addition, in the embodiment of Mizui 1, the blower fan 12 was attached to the lower unit 1, but the blower fan 12. Air duct 13. The sub-intake port 14 may be provided as a separate unit.

With this configuration, it is only necessary to add a dedicated unit for oven use.

A second embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

The difference from the first embodiment is that, as shown in the figure, the blower fan 12 and the blower passage 13 are not provided, and the lower unit 32 is not provided.
An upward passage 36 connecting the communication hole 35 to the inlet of the cooling fan 17 is provided on the bottom surface of the
The exhaust air from the cooling fan 17 on the side where the upward passage 36 is provided is connected to each of the heat sinks 18a, 18b, 18c, and 18d of the heat sink 18.
The point is that their positions and the arrangement of the vertical partition plates 34 are adjusted so that they do not hit.

To explain the cooling operation of the above configuration, in the case of induction heating, the switching element 19 is a heat generating component of the control circuit 26.
Therefore, the heat sink 18 to which the switching element 19 is attached is sucked in from the main intake port 16 by the cooling fan 17 as shown by the arrow f17), and the heat sink 18 is cooled as shown by the arrow q. At this time, when the oven 1° is used, hot air is exhausted from the oven exhaust port 11, but from the sub-intake port 14, as shown by arrow i, there is an upward passage 37 and a narrow communication hole 36. The exhaust air from the oven 10 is sucked into one corner of the inlet of the cooling fan 17 through the upper communication passage 36, and the hot air flows in the direction of arrow j by the vertical partition plate 34 in the duct 33, and this hot air flows into the heat sink 18. Since the oven 1o is separated by a vertical partition plate so as not to hit the oven 1o, the hot air from the oven 1o does not mix with the cooling air from the heat sink 18. Therefore, the cooling performance of heat-generating parts is not reduced.
Even when the oven 10 is used, induction heating can be used stably. Further, since measures are taken to take in hot air and cold air and separate them using only the cooling fan 17, the configuration can be made at low cost.

Furthermore, when the heating chamber 26 is provided inside the main body as in the embodiment of the wooden tablet 2, the heating chamber 26 side is easily affected by the heat, so the heating chamber 26 side is connected to the sub-intake port 14. Cooling performance can be improved by including it in the intake path.

In addition, in the embodiment of the wooden tablet 2, the duct 33 of the cooling fan 17
By installing the vertical partition plate 34 inside the sub-intake port 1
The exhaust air from the oven 10 sucked in from the heat sink 1
8, but if there is sufficient space, the vertical partition plate 34 may be eliminated and the heat sink 18 may be moved.

Further, although the sub-intake port louver 16 is used in both embodiments, it may not be provided. Further, in both embodiments, two induction heating units, one heater heating unit, and one heating chamber 26 are combined as heating means, but it is sufficient that at least one induction heating unit is included.

Effects of the Invention As is clear from the above embodiments, the heating cooker of the present invention has a sub-intake port and a blower passage, and uses a blower fan to suck in the exhaust air from the oven. Induction heating can be used stably without reducing cooling performance. Furthermore, since measures are taken to ensure that the exhaust air from the oven is sucked in, the user does not feel any discomfort between the exhaust and cooling functions.

In addition, by providing a communication path in the sub-intake port, sucking the oven exhaust air through the communication path using only the cooling fan, and cooling the exhaust while preventing it from hitting the heat sink by arranging the heat sink, it is possible to do the same as above. Induction heating can be used stably even when using the oven, and the intake air of the cooling fan is separated.
There is no need to provide a new blower fan, and the structure can be constructed at low cost.

[Brief explanation of the drawing]

Fig. 1 is a side cross-sectional view showing a heating cooker according to a first embodiment of the present invention, Fig. 2 is a perspective view thereof, and Fig. 3 is a side cross-sectional view of essential parts showing a heating cooker according to a second embodiment of the present invention. 4 is a plan sectional view of the same essential part, FIG. 6 is a side sectional view of the same, and FIG. 6 is a perspective view of the conventional heating cooker. 8a, sb...Induction heating coil, 12. River.
・Blower fan, 14...Sub-intake port, 16・River・
・Main intake port, 17... Cooling fan, 18...
...Heat sink, 26...Control circuit. Name of agent: Patent attorney Shigetaka Awano and 1 other person-B
, -- 1 numbness rl 鵞子 4 LE 12 - Issho Mia fan 1 + --- 9 III Botoriguchi 18 --- Bee ni Sonku 95 --- Soreri sparrow boat P times m Fig. Fig. Fig. Figure diagram

Claims (2)

[Claims] (1) An induction heating coil is provided, a control circuit is provided to drive the induction heating coil, a cooling fan is installed to cool heat-generating components of the control circuit, and the intake port of the cooling fan is provided at the front as a main intake port. . A heating cooker comprising a sub-intake port provided below the main intake port, and a blower fan that sucks air from the sub-intake port. (2) An induction heating coil is provided, a control circuit is provided to drive the induction heating coil, a cooling fan is installed to cool the heat-generating components in the control circuit, and the cooling intake port of the cooling fan is used as the main intake port on the front surface. A sub-intake port is provided below the main intake port, the main intake port and the sub-intake port are separated and communicated with the intake side of the cooling fan, and the heat generating component corresponds to the intake air on the sub-intake port side. The heating cooker is located away from the exhaust path of the cooling fan.