JP2748596B2 - Cooker - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating regulator which operates by being incorporated in kitchen furniture or the like.

2. Description of the Related Art Conventionally, a heating cooker using electromagnetic induction does not include a heating chamber such as a roaster incorporated in a main body, and has only a heating unit such as a pan.

Problems to be Solved by the Invention A conventional induction-type cooking device requires a control circuit for driving, and in that circuit, there are many components that require cooling of a switching element such as a transistor. However, if a heating chamber such as a roaster is incorporated in the main body, heat leaks from the heating chamber, and the control circuit near the heating chamber may be directly heated by heat conduction, or the temperature of the cooling air in the control circuit near the heating chamber may increase. Thus, there has been a problem that the cooling performance of the control circuit in the vicinity of the heating chamber is reduced, and the normal operation is not performed.

The present invention is to solve the conventional problem, and to provide a heating cooker that can normally operate the control circuit even if heat leaking from the heating chamber lowers the cooling performance of the control circuit near the heating chamber. This is the first purpose.

A second object is to fundamentally solve the problem that the heat leaking from the heating chamber lowers the cooling performance of the control circuit near the heating chamber.

Means for Solving the Problems In order to achieve the first object, the technical means of the present invention includes a heating chamber such as a roaster in a main body, a plurality of induction heating coils in an upper part of the main body, The number of control circuits for driving the heaters is equal to the number of induction heating coils provided in the main unit.A cooling fan is installed in front of the control circuits, and the maximum output of the control circuit near the heating chamber is the maximum output of the other control circuits. Smaller.

Further, in order to achieve the second object, the present invention provides a heating chamber such as a roaster in a main body, at least one induction heating coil in an upper part of the main body, and a control circuit for driving the induction heating coil. A number of coils corresponding to the number of coils are provided in the main body, a cooling fan is mounted in front of the control circuit, and an induction heating coil using the control circuit near the heating chamber and the heating chamber are switched and used by a switch.

Operation Even if the cooling performance of the control circuit near the heating chamber is reduced by the leakage heat from the heating chamber by the first technical means, the control circuit near the heating chamber is designed to have a smaller output than the other control circuits. In addition, the amount of heat generated by the heat-generating components such as transistors in the control circuit near the heating chamber is also reduced, so that less cooling may be required for other control circuits, and as a result, control of the vicinity of the heating chamber regardless of heat leakage from the heating chamber The circuit can be used for induction heating.

Because the second technical means switches between the heating chamber and the control circuit near the heating chamber for use, it is not necessary to consider that the cooling performance of the control circuit near the heating chamber decreases due to heat leaking from the heating chamber. Absent.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a heating cooker according to a first embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a plan view showing the inside of the lower main body. In the figure, reference numeral 1 denotes an upper body. Reference numeral 2 denotes a top surface of the kitchen furniture supporting the upper body 1. Reference numeral 3 denotes a heat-resistant cooking plate, which is fixed by an outer frame 4. Reference numerals 5a, 5b, and 5c denote induction heating coils provided below the cooking plate 3 to electromagnetically heat a pot (not shown) placed on the cooking plate 3 by the coils. Reference numeral 6 denotes a back grill, which is provided at a rear portion of the upper main body 1. An exhaust port 7 for exhausting air is provided on an upper surface of the back grill 6. 8 is a lower main body. 9
Is a frame of kitchen furniture supporting the lower body 8. Reference numeral 10 denotes an intake port provided on the front surface of the lower main body. An operation unit / display unit 11 is provided below the intake port 10. Reference numeral 12 denotes a heating chamber made of a roaster or the like having a depth in the longitudinal direction, which is attached to the lower main body 8, and provided with a door 13 which can be opened and closed on the front. Reference numeral 14 denotes a heating chamber exhaust port provided at the rear of the heating chamber 12. Reference numeral 15 denotes a cooling fan formed of, for example, a cross flow fan, which is provided near the intake port 10 of the lower main body 8. The cooling fan 15 is driven by a motor 16. 17a,
17b and 17c are heat sinks having cooling fins, which are mounted in parallel on the air blowing side of the cooling fan 15. 18a, 18b,
18c is a control circuit for sending electricity to the induction heating coils 5a, 5b, 5c to generate a magnetic field, and heat sinks 17a, 17b, 17c
And is provided electrically coupled to the rear part. In other words, the control circuit 18c includes a transistor 19c and a diode 20c that need particularly cooling, but these are pulled out from the control circuit 18c to the heat sink 17c by a connection cord and fixed.
In addition, the control circuit 18c near the heating chamber 12 includes another control circuit 1
The maximum output is lower than that of 8a, 18b (in this embodiment, it is set to about half that of 18a).
Transistor 19c and diode 20c provided in 18c
Generates less heat than those provided in the other control circuits 18a and 18b, and has an induction heating coil at the rear of the upper body 1.
The output of 5c is smaller than the other induction heating coils 5a and 5b.
Further, in the present embodiment, the control circuit 18 has one transistor 19
Since there are two diodes 20 each, one control circuit 18 and two heat sinks 17 are combined. Each control circuit 18 is electrically connected to the operation unit / display unit 11. 21a, 21b, 21c are substrates, a set of heat sinks 1
7 and the control circuit 18 are fixed and attached to the lower body 8.

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

When the pan is placed on the cooking plate 3 and operated to heat the pan from the operation unit / display unit 11, the cooling fan 15 rotates,
As shown in FIG. 2, air is taken in from the intake port 10 in the direction of arrow a, and the heat sink 17 is cooled from the cooling fan 15 as shown by arrow b.
Is cooled and exhausted from the exhaust port 7 of the back grill 6. Thus, when the induction heating coil 5 is energized and the pan is being heated, the heating components of the control circuit 18, especially the transistor 19,
Generates heat, but since the wind of the cooling fan 15 first hits the heat sink 17 to which the transistor 19 is fixed, the heat can be sufficiently cooled. Of course, since the wind after cooling the heat sink 17 hits the control circuit 18, other heat-generating components can be cooled.

At this time, when a fish or the like is put into the heating chamber 12 and energized and heated, heat in the refrigerator leaks, and the heat sink 17 near the heating chamber 12 is heated.
This leakage heat is transmitted to the control circuit 18c and the control circuit 18c, and the cooling performance is significantly reduced. In addition, heat leaks from the door 13 of the heating chamber 12 and heats the air near the intake port 10 on the heating chamber side, so that the temperature of the cooling air on the heating chamber 12 side increases, and the heat sink 17c
And the cooling performance of the control circuit 18c is significantly reduced. However, since the output of the control circuit 18c is smaller than those of the other control circuits 18a and 18b, the amount of heat generated by the transistor 19, which is a heat-generating component, is reduced accordingly. Thus, it is possible to sufficiently cope with the deterioration of the cooling performance that occurs when the heating chamber 12 is used, and the heating chamber 12 and the control circuit 18c near the heating chamber 12 can be used together.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG.

Since most of the components are the same as those of the first embodiment, only different portions will be described. Fig. 4 shows the operation unit and display unit
22 is an enlarged view of a main part of FIG. In the figure, reference numeral 23 denotes a switch for switching between the heating chamber 12 and the control circuit 18c. Since the changeover switch 23 is used by switching between the heating chamber 12 and the control circuit 18c of the induction heating coil 5c near the heating chamber 12, unlike the first embodiment, the control circuit 18c near the heating chamber 12 during use is different from the first embodiment. It is not necessary to consider the deterioration of the cooling performance such as. Therefore, the maximum output of the control circuit 18c in the vicinity of the heating chamber 12 can be set to the same level as the others.

In addition, although the induction heating cooker has three openings in both embodiments, the number of openings and the combination with other heating means (such as a nichrome heater) can be freely changed, and in the first embodiment, at least two openings and a second opening are required. In the embodiment, at least one induction heating means may be used. Although the control circuit 18 and the heat sink 17 are separated from each other, they may be provided on the control circuit 18. Furthermore, in both embodiments, a cross flow fan is used for the cooling fan 15, but the type of the fan is not limited, and a propeller fan or the like may be used. In both embodiments, the main body is composed of the upper main body 1 and the lower main body 8.
However, it may be a form in which all are incorporated in one main body.

Effect of the Invention As described above, in the induction heating cooker of the present invention, the cooling fan is mounted in front of the control circuit, and the maximum output of the control circuit near the heating chamber is made smaller than the maximum output of the other control circuits. Therefore, even if the cooling performance of the control circuit near the heating chamber decreases due to heat leaking from the heating chamber, the control circuit near the heating chamber is designed to have a smaller output than the other control circuits. The amount of heat generated by the heat-generating components of the switching elements, such as transistors, is also small, so less cooling may be required for other control circuits, and as a result, induction is performed using the control circuit near the heating chamber regardless of heat leakage from the heating chamber. Can be heated. This eliminates the need to cool the control circuit near the heating chamber with a complicated configuration,
Can be designed to be inexpensive.

In addition, a cooling fan is mounted in front of the control circuit, and the induction heating coil using the control circuit on the side close to the heating chamber and the heating chamber are switched and used by a switch, so that the heating circuit and the control circuit near the heating chamber can be used. To switch and use,
It is not necessary to consider that the cooling performance of the control circuit near the heating chamber decreases due to the heat leaking from the heating chamber. Therefore, the output of the control circuit in the vicinity of the heating chamber can be designed to match the other control circuits.

[Brief description of the drawings]

FIG. 1 is a perspective view of a heating cooker according to a first embodiment of the present invention, FIG. 2 is a sectional view of a main part of the same, FIG. 3 is a plan view of the lower main body, and FIG. It is a top view of the operation part of the cooking device in Example of a. 1 Upper body, 5a, 5b, 5c Induction heating coil, 8 Lower body, 12 Heating chamber, 15 Cooling fan, 18a, 18b, 18c
... Control circuit.

Claims (2)

(57) [Claims] A heating chamber such as a roaster is provided in a main body, a plurality of induction heating coils are provided in an upper portion of the main body, and a control circuit for driving the induction heating coils is provided in a number corresponding to the number of induction heating coils in the main body. A heating cooker provided with a cooling fan in front of the control circuit, wherein the maximum output of the control circuit near the heating chamber is smaller than the maximum output of the other control circuits. 2. A heating chamber such as a roaster is provided in a main body, and at least one induction heating coil is provided in an upper part of the main body. A control circuit for driving the induction heating coil is provided by a number corresponding to the number of the induction heating coils. A heating cooker that is installed in the main body, has a cooling fan mounted in front of the control circuit, and uses a switch to switch between an induction heating coil using the control circuit near the heating chamber and the heating chamber.