JPS6157533B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cooking device.

In a conventional cooker, as shown in FIG. 4, a lead wire 3 is connected to a heater 1 used as a heating means through a plate metal body 2, to prevent the lead wire 3 from being thermally deteriorated by the heat of the heater 1. I'm trying to prevent it.

That is, the heat of the heater 1 is radiated by the metal body 2, and the heat of the heater 1 is prevented from being transmitted to the lead wire 3 as much as possible.

However, in the conventional device, since the metal body 2 is installed in a high temperature atmosphere, heat is not sufficiently radiated from the metal body 2, and the lead wire 3 is deteriorated by heat.

The purpose of the present invention is to eliminate such conventional drawbacks and prevent lead wires from deteriorating due to heat.
In order to achieve this object, the connecting portion between the metal body and the lead wire is made to protrude into the low temperature chamber.One embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a high-frequency heating device to which an embodiment of the present invention is applied. 1 is a heating chamber in which food is dielectrically heated by high frequency waves and electrically heated by a heater 2 (used as a heating means); A waveguide 3 is attached to guide the high frequency waves generated by an oscillator (not shown) into the heating chamber 1. The heating chamber 1 is housed within the main body case A at a predetermined interval B as shown in FIG. Further, behind the rear wall (4 in FIG. 2) of the heating chamber 1, a fan 5 and a driving motor 6 are provided for forcibly circulating hot air through the holes 14 in the heating chamber 1. 7 is a heating chamber front plate, 8 is a bottom constituting the main body case A, and 9 is an exhaust pipe from the heating chamber 1. Next, in FIG. 2, 10 is an opening 11 of the heating chamber front plate 7.
This is a door that can be opened and closed at will. Furthermore, on the inside bottom of the heating chamber 1 is a rotary mounting table 1 on which food is placed.
2, which is rotatably driven by a magnet rotating body 13 below.

Next, in order to supply power to the heater 2, it is necessary to connect a lead wire (Fig. 3 30), but in this embodiment, the terminal 15 of the heater 2 is at a high temperature of 200°C or more, so the lead wire 30 If the terminals 31 of the lead wires 30 are directly connected with the terminals 15, there is a risk that the lead wires 30 will be thermally deteriorated due to heating if used for a long time. Therefore, in this embodiment, the following measures were taken.

That is, in FIG. 2, the arrows inside the heating chamber 1 represent the flow of hot air. When the circulation fan 5 starts to rotate by the drive motor 6, the air near the center of the heating chamber 1 flows through the hole 1 provided in the rear wall 4.
4 and is sucked into the center of the fan 5 and sent out toward the outer periphery, and when passing through the heater 2 provided in a circumferential manner around the fan 5, it absorbs the heat of the heater 2, and the outer periphery of the rear wall 4 It is blown out into the heating chamber 1 through the hole 14 . As can be seen from Figure 2, hot air flows along the top, bottom, left and right walls, and much of the heat is carried away by the outside walls. That is, compared to the so-called upper and lower heater method in which the heater 2 is installed in the heating chamber 1 to electrically heat food, the hot air circulation method of this embodiment causes the temperature of the heating chamber 1 itself and its vicinity to be higher. It is. Especially terminal 1 of heater 2
5, the temperature near the upper plate 16 of the heating chamber 1 becomes high, and this hot air is accumulated between it and the main body case A. Therefore, in this embodiment, one part of the upper plate 16 of the heating chamber 1 is
At one end, there is a heat shield plate 1 that is an extension of the side wall of the heating chamber.
9 (used as an example of the plate), and the second
As can be seen from the figure, this heat shielding plate 19 fills the space between the heating chamber upper plate 16 and the main body case A, and the heat shielding plate 19
The gap created between 9 and surrounding parts is sealed with a part 20 made of heat-resistant cushioning rubber or the like. Similarly, the gap between the rear part of the heating chamber 1 and the rear plate 21 constituting the main body case A is closed with a heat shield plate 22. That is, the space inside the main body case A excluding the heating chamber 1 is partitioned into a high temperature side 23 consisting of the heating chamber 1 and a hot air generation function section, and a low temperature chamber 24 consisting of other functional parts. It is. At this time,
The ambient temperature in the low temperature chamber 24 is greatly influenced by the amount of hot air generated from the side wall of the heating chamber 1, which is the interface with the high temperature side. A heat insulating material is attached to the side surface of the low temperature chamber 24, and holes for heat radiation are provided in the walls of the low temperature chamber 24 other than the heat shielding plate 19. With this configuration, a considerable temperature gradient is created on the left and right sides of the heat shielding plate 19, which is the boundary surface. In this state, the other end of the rod-shaped metal body 25, one end of which is connected to the terminal 15 of the heater 2, is connected to the heat shielding plate 19.
is made to penetrate and protrude into the cold room 24. At this time, the metal body 25 connects one end to the terminal 15 of the heater 2.
Since the central part is held by the through hole 26 of this heat shielding plate 19, only the area around the through hole 26 is constituted by a holding plate 27 made of a heat-resistant insulating material made of a mica laminate. One end of the metal body 25 is the terminal 1 of the heater 2.
5 with screws 28, and a connection terminal 29 is fixed to the other end on the side of the cold room 1, and is connected to a terminal 31 attached to a lead wire 30 for supplying electric power. Ru. The metal body 25 is made of iron with nickel plating applied to its surface. With this configuration, the heat from the heater 2 is dissipated by the heat dissipation effect of the metal body 25, the metal body 25 approaches almost the ambient temperature, and the heat shielding plate 1
9, the temperature drops rapidly as the ambient temperature decreases, so no heat conduction that would cause thermal deterioration occurs in the lead wire 30 connected to the metal body 25, and the lead wire 30 and Since the connecting parts can also be kept at a low temperature, connection deterioration can be kept to a minimum and the service life can be extended. Also, without fixing both ends of the metal body 25, the heat shielding plate 19 is inserted in the middle.
Even when the metal body 25 becomes longer, the thermal expansion of the metal body 25 itself applies unreasonable force to both fixed ends, and this repetition causes loosening and connection failure. There is no need to worry about heat generation, increased insulation resistance, and thermal deterioration. In addition, since the lead wire 30 can be connected at a low-temperature location and there are no high-temperature parts nearby, there is no need to use expensive heat-resistant lead wires.Furthermore, since it is located close to other electrical components, the overall wiring can be done easily.

As described above, according to the present invention, the heat of the heating means is dissipated by the metal body, and the connection portion between the metal body and the lead wire is made to protrude toward the cold room side, so that thermal deterioration of the lead wire does not occur. Insufficient energization to the heating means, electrical leakage, etc. will not occur.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of an embodiment of the present invention applied to a high-frequency heating device, and FIG. 2 is a sectional view of the same device.
FIG. 3 is an enlarged exploded perspective view of the main parts of the same device, and FIG. 4 is a perspective view showing a conventional example. 1...Heating chamber, 2...Heater (heating means),
19, 22... Heat shielding plate (plate body), 24... Low temperature chamber, 25... Metal body, 30... Lead wire, A...
Main body case, B...space.

Claims (1)

[Claims] 1 A main body case, a heating chamber provided at a predetermined interval within the main body case, a heating means for heating food in this heating chamber, a metal body whose one end is connected to this heating means, and a metal body that is connected to the heating means at one end. A lead wire connected to the other end, a plate partitioning a space between the main body case and the heating chamber, and a holding plate made of a heat-resistant insulator that is engaged with the plate and held through the metal body, the main body case A space between the metal body and the heating chamber is partitioned by the plate to form a low temperature chamber, and the holding plate allows the metal body to slide in the direction in which the metal body extends, and causes the other end of the metal body to protrude into the low temperature chamber. Cooking device.