JPS6212166Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has changed the conventional method of having a switch for selecting both the upper and lower heaters in addition to the cooking selection switch when using a high-frequency heating device with a built-in electric heater as an oven. To provide a high-frequency heating device which is convenient to use by simplifying the complicated operations imposed on the user by enabling all cooking selection operations only by operating a cooking selection switch.

Conventionally, this type of apparatus has been constructed as shown in FIGS. 1 and 2. In the figure, 1 is the heating chamber, 2 is the food, 3 is the door, 4 is the high frequency oscillator (magnetron), and 5 is the saucer on which the food 2 is placed.When used as a high frequency heating device, heat-resistant glass with low high frequency loss is used. Ceramic ones are used, and when used as an oven, metal ones with good heat conductivity are used. 6 is an upper heater, and 7 is a lower heater.
An operation panel 8 is provided adjacent to the door 3, and the operation panel 8 includes a cooking selection switch 9, a timer knob 10, a high frequency start button 11, a heater changeover switch knob 12 when used as an oven, and a heating chamber temperature setting knob. 13, and each indicator light 14,1
5 and 16 are arranged. The food selection switch is also provided with a knob 17 with an index that can be slid up and down.

With the above configuration, when this high-frequency heating device is often used as an oven using both upper and lower heaters, first set the indicator knob 17 to "oven", then turn the knob 12 to "upper and lower". When using only this outer upper heater, when using only the lower heater, or when using for fermentation as part of bread baking, first turn the index knob 17. It is necessary to set the knob 12 and then set the knob 12, which is a hassle for the user. This will be further explained using a circuit diagram.

FIG. 3 is a circuit diagram of a conventional example. The upper circuit in the figure is mainly for high-frequency oscillation, and since it is not directly related to the present invention, a description thereof will be omitted, and the lower circuit, that is, the circuit relating to switching and combination of both the upper and lower heaters will be mainly explained. As described in the above description of the configuration, 4 is a high frequency oscillator, 6 is an upper heater, and 7 is a lower heater.
20 is a time switch that closes when the timer motor Mr is set and opens when the set time elapses. 21 is a switch for switching between high frequency heating and heater heating, and 22 is a diode 2 only when grilling food.
A switch 24 is used to connect the upper heater 6 and lower heater 7 to the power supply in series, connect them in parallel to the power supply, use only the upper heater, or use only the lower heater. This is a changeover switch for The diode 23 normally half-wave rectifies the current of the upper heater to reduce power consumption, but
This is short-circuited only when grilling food to double the power consumption and brown the food quickly and reliably. 25 is a temperature setting and temperature regulator for the heating chamber 1. That is, by turning the knob 13, the movable contact n changes its position to set the temperature, and when the temperature exceeds the set temperature, the temperature-sensitive contact piece m made of bimetal separates from the movable contact n and interrupts the circuit.
When the temperature falls below the set temperature, the temperature-sensitive contact piece m comes into contact with the movable contact n again. In this way, the temperature inside the heating chamber 1 is maintained at approximately the set temperature.

A conventional example with such a circuit configuration is
To use the heater as an oven in various ways, you must perform the following operations.

Fermentation: - When the indicator knob 17 is set to "Fermentation", the changeover switches 21 and 22 both contact b, and when the knob 12 is then set to "Fermentation", the changeover switch 2
4 is in the state shown in FIG. When the timer motor Mr is set in this state, the time switch 20 closes and current flows through the upper heater 6 and lower heater 7 in series.

Upper heater or lower heater: - When the indicator knob 17 is set to "Oven", the changeover switches 21 and 22 remain unchanged, and when the knob 12 is then set to "Up" or "Down", the changeover switch 24 is set to the position shown in Fig. 4. The state will be A or B. In this state, if the time switch 20 is closed as described above, only the upper heater 6 or the lower heater 7 is connected to the power source and current flows.

Upper and lower heaters: - When knob 12 is set to "upper and lower" with indexed knob 17 set to "oven" and selector switches 21 and 22 still in contact with b,
The changeover switch 24 is in the state shown in FIG. 4C. In this state, when the same time switch 20 as described above is closed, the upper heater 6 and lower heater 7 are connected in parallel to the power supply and current flows.

Grille: - When the index knob 17 is set to "GRILLE", the changeover switch 21 contacts b, and the changeover switch 22 contacts a, and the time switch 20 is turned on as before.
When closed, the upper heater 6 is connected to the power source without the diode 23, regardless of the changeover switch 24, and a doubled current flows.

The present invention has three changeover switches 21, 22, and 24 as described above for conventional oven cooking, and when viewed from the operation panel, a heater changeover switch knob 12 is provided outside of the cooking selection switch 9. , high-frequency heating dishes and nine cooking selection switches are combined into one single switch. Therefore, since the present invention differs from the conventional one only in the operation panel and circuit configuration, the explanation of the present invention will be limited to these two parts and will omit explanation of other parts.

FIG. 5 shows an operation panel of an embodiment of the present invention. If you look at this diagram, the heater selector switch knob 1
2 and its dial disappear, and instead, the dial of the cooking selection switch 9 displays "upper/lower heater cooking", "upper heater cooking", and "lower heater cooking" in place of "oven".

FIG. 6 is a circuit diagram of an embodiment of the present invention. In the figure, p and q correspond to the third p and q. 41 and 44 are temperature regulators, respectively. 44 is for fermentation,
Especially suitable for low temperature settings. n, n' are movable contacts,
m and m' are temperature-sensitive contact pieces, and their functions are as explained in the conventional example. It is also the same as in the conventional example that 6 is an upper heater, 7 is a lower heater, and 23 is a diode. , . . . are terminals necessary for switching each of the above-mentioned components arranged in a row.

FIG. 7 shows a slide switch for switching and connecting the necessary terminals among the above terminals according to five types of cooking: fermentation, upper and lower heaters, upper and lower heaters, and grilling. Connect the terminal corresponding to 〓
~〓, and fixed contacts 45 connected to these are arranged on the surface of a fixed contact plate 46 as shown. Further, sliding contact pieces A, B, D, F, and G are arranged in a row on the back surface of the sliding contact piece body 47 as shown in the figure, and slide up and down on the fixed contact plate 46. 17 is a knob with an index indicating the current position. Furthermore, five types of dishes are displayed on the dial plate through which the indexed knob 17 passes, as shown in the figure. When using ~
The corresponding terminals are connected to and 〓 to 〓, respectively.

Next, circuit configurations for the five types of dishes will be explained.

(1) Fermented dishes: - When indicator knob 17 is set to “fermentation”
A fixed contact 46 (hereinafter referred to simply as 〓. The same applies to 〓, 〓...〓) connected to 〓, 〓 and 〓, 〓 and 〓 are sliding contacts A, D, F, respectively. bridge by Therefore, the following circuit is established.

Power supply - Fermentation temperature regulator 44 ---- Upper heater 6 - Diode 23 - Lower heater 7 ---- Power supply (2) Upper and lower heater cooking: - When knob 17 with index is set to "upper and lower heater" 〓, 〓 and 〓, 〓 and 〓, and 〓 and 〓 are bridged by sliding contact pieces A, B, G, and H, respectively. Therefore, the following circuit is established.

Power supply - Temperature controller 41 --- Upper heater 6 - Diode 23 - 〓 〓 --- Power supply - Lower heater 7 (3) Upper heater cooking: - When the index knob 17 is set to "upper heater", 〓 and 〓, 〓 and 〓, 〓 and 〓 are respectively sliding contact pieces A,
Bridged by F and H. Therefore, the following circuit is established.

Power supply - Temperature controller 41 ---- Upper heater 6 - Diode 32 ------- Power supply (4) Lower heater cooking: - When the index knob 17 is set to "lower heater", 〓 and 〓, 〓 and 〓, 〓 and 〓 are respectively sliding contact pieces A,
Bridged by B and H. Therefore, the following circuit is established.

Power source - Temperature controller 41 ---- Lower heater 7 ---- Power source Grilled food: - When knob 17 with index is set to "Grill"
and 〓, 〓, and 〓 are bridged by sliding contacts A and H, respectively. Therefore, the following circuit is established.

Power source - Temperature controller 41 --- Upper heater 6 --- Power source In the above explanation, a cooking selection switch as shown in Fig. 7 was used for convenience, but other switches may be used as long as they perform the same function. Needless to say.

As explained above, according to the present invention, the heater selection switch knob 12 is removed from the operation panel and is combined into one cooking selection switch 9, which simplifies the user's operation. Since the changeover switches 21, 22, and 24 are eliminated and are combined into one cooking selection switch 9, the operation is significantly simplified as the number of switches is reduced. Furthermore, since the dish selection switch 9 is configured as a slide switch, a desired selection setting can be made with only one linear slide operation, which further simplifies the operation and reduces erroneous operations.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a conventional example of a high-frequency heating device, Fig. 2 is a vertical side view of the same, Fig. 3 is a circuit diagram of the same,
Fig. 4 is a diagram showing various states of the heater selector switch in Fig. 3, Fig. 5 is a front view of the operation panel of an embodiment of the present invention, Fig. 6 is the same circuit diagram, and Fig. 7 is the same dish. It is a figure which shows a selection switch. 1... Heating chamber, 4... High frequency oscillator, 6... Upper heater, 7... Lower heater, 9... Cooking selection switch, 12... Heater selection switch knob, 23...
…diode.

Claims (1)

[Claims for Utility Model Registration] A heating chamber that stores food therein and cooks various dishes by selectively using at least one of the heating functions of a high-frequency source and an upper and lower heater; In a high-frequency heating device having an operation panel near the front opening of the heating chamber, a slide switch for selecting a dish is slidably operated by a single cooking selection knob provided on the operation panel near the front opening of the heating chamber. The food selection slide switch has a switch contact for selecting and setting the heating function, an operation state setting switch contact for setting each operating state of the selected heating function, and a selective bridge between these contacts. The switch is configured as a single switch consisting of a sliding contact piece connected to the food selection knob, and the food selection knob is used to slide the sliding contact piece to select a dish, and also to set the operating state. High frequency heating equipment.