JPS6235493A - Controller for electronic microwave range with oven - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a microwave energy or resistance heating system which is configured to adjust the microwave energy in terms of heating power and power and heating time using a time and program control device. The present invention relates to a control device for a microwave oven with an oven for cooking food or liquid using thermal energy.

[Conventional technology]

A microwave oven equipped with a switching means that allows the cooking process to proceed with a timer is known. In this case, the round heating power and temperature of the cooking process are preset via regulating means, while the duration, end and start of the cooking process are generally controlled via a timer which can be set for up to 24 hours. Such a control means is suitable for limiting the time of the cooking process and allowing it to proceed even when no one is around to operate it.

In addition to this, a microwave oven is also known which is provided with a control means that controls the heating output by clock control of the microwave output within a preliminarily limited time immediately after input of a start command. In this connection, it is also possible to introduce different microwave powers one after the other in time to the food to be cooked. The maximum permissible time for the microwave cooking process is specified in any case and must not be exceeded.

In known microwave ovens that use thermal energy by resistance heating and fibrous energy for processing food, the pure microphone 112' function and the pure heating function by resistance heating elements are generally provided with a timer as described above. It will be held in However, it is also possible to carry out the microwave function as described above and at the same time manually control the supply of thermal energy by means of resistive heating.

[Problem that the invention seeks to solve]

It is an object of the present invention to develop the above-mentioned known technology and further improve the control device for a range for cooking food or liquid using microwave energy and thermal energy by resistive heat, thereby expanding the range of applications of the range. It is in.

[Means for Solving the Problems] According to the present invention, the time/program control device is provided with a switching means, so that the resistance heating can control cooking according to the set value of temperature or output even during the period of microwave operation. It is achieved by being guided by things.

〔Effect of the invention〕

According to the control device according to the present invention, it is possible to simultaneously temporally control microwave energy and thermal energy by resistance heating for convenient use.

Such functionality simplifies operation for users for appropriate applications. The thermal energy due to resistive heating can be preadjusted by conventional input mechanisms.

[Embodiment]

In an advantageous embodiment of the invention, the time/program control device is provided with a function selection switch, via which the program control device can be switched alternately between ``microwave'', ``resistance heating'' and ``microwave + resistance heating''. Switched. When this selection switch assumes the "microwave" position, it is possible to manually turn on and off resistance heating regardless of whether the microwave function is being implemented. Adjustment of the microwave function takes place via the input mechanism of the time and program control device.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Numami 1Fi is used as a function selection switch. It is used to input various functions, namely "Resistance heating with timer", "Microwave" and "Microwave with timer +".
One switching position is provided for each function of "resistance heating". In the "Microwave" position, the microwave function is prepared and started as follows. That is, first, the output value of the microwave is set via the corresponding push button 2 of the control device, and the time is set via the rotary knob 3, and this time is displayed on the display 4. Next, the flash button of the indicator lamp 5 prompts the user to operate the start push button 6. If you want to stop the microwave function earlier than scheduled, you can operate the stop push button 7.

Resistive heating can also be set up and carried out in the "microwave" position, whether or not the microwave function is activated in this way. A temperature control knob 8 is used to adjust the set values, and it is possible to set the temperature value of 50° C. to 250° C. and the position of the grill function located next to the lamp indicating that the oven is in use.

If the resistance heating is to be carried out with a timer, the adjustment likewise takes place via the temperature control knob 8, but the function selection knob 1 must be set to the position "Resistance heating with timer". Subsequently, the flashing of the indicator light 5 prompts the user to operate the corresponding pushbutton 2 and set the time via the rotary knob 3. Next, by operating the start push button 6, resistance heating with a timer is started.

At the "Microwave + Resistance Heating" position, setting values can be input in the same way as for the pure microwave function and resistance heating function. In this case, the set time of the microwave function is automatically used for the resistance heating function. The start of cooking is also carried out via the start push button 6.

As shown in Fig. 2, the various functions that can be performed by the range according to the present invention are expressed as binary values according to the positions of the switching contacts FL, F2, F3, which can be set by the cam attached to the selection knob 1. Wasare, time/program control device rtz
st<Figure 3).

As is clear from FIG. 2, contacts FM and Fl are opened when resistance heating is used, contact F2 is opened when microwave heating is used, and all contacts Pi, IF2 . P3 remains open.

FIG. 3 shows that contact F1 is connected to a heating current circuit of heating resistors R1, R2, R3. Contact point F2.73 is used for inputting information to control device 12δt.

The heating resistor R1 is used as a grill heating element or a heating element for the upper heater, whereas the heating resistors R2 and R3 belong to the lower heater of the oven. The temperature regulator TR in the output current circuit is adjusted to an operating value by a temperature control knob 8 (FIG. 1). A cam is attached to the shaft of the temperature control knob, and contacts TI, T2 . T3. T4 is switched.

Contact point T1. F2 is closed when @degree adjustment knob 8 is rotated to the heating range. In the temperature range up to 250°C, contact T2#: remains closed and contact T3 is opened, so that heating resistors R2 and R3 are used as heating elements for the lower heater, and heating resistor R1 is connected in series with heating resistor R3. Since it is connected, it acts as a heating element for the upper heater. When the temperature control knob 8 is turned to the grill position, contact T2 opens and contact T3 closes. Due to this, heating resistors R2, R5
interrupts its action and the full supply voltage is applied to the heating resistor R1 as a grill heating element. The adjustment range of the temperature regulator TR is utilized as well, so that the associated contacts remain closed. By rotating the temperature control knob 8 to the grill position, the heating current output regulator KiR acts to reduce the output to the heating resistor R1 to control the heating current.

In order to ensure that the resistance heating ends within a predetermined time and that this heating time does not start immediately if necessary, the function selection knob 1 is turned counterclockwise K to the position ``Heating resistance''. Switching contact IF1. In this case, F2°IF3 is operated by a cam arranged on the shaft of function selection knob 1, and contacts F1. 11 is opened and contact F2 is closed. The current supply to the heating element via switching contact P1 is thereby interrupted. The relay R11 is energized for a predetermined time via the time/program control device It, and the contact 8r1
Since the contact EIr1 is closed, a heating current flows for a predetermined period of time via this contact EIr1. Time/program control device 1st,
Further relays R42, R13°R14 controlled by the respective contacts 8r2. S r 5゜8
It functions to control the microwave generator with magneton Mg via r4. This microwave generator is generally driven only via a time and program control device Z6t. Contact point θ1. s2. e3 is for the safety of the door while the microwave function is in operation.

FIG. 4 shows the relationship between the time/program control device 1z6t and the input mechanism. The central unit of this time and program control device is a microprocessor μP, whose human power [K L K2. K3. K4 is a switching contact L3 and a switching contact F2 attached to the push button 2 shown in FIG. I
F3. el, s6. Output side RCI or R via sy
3 are multiplexed.

Relay Rzi via output side R8-R4O. R12゜R
t3. R14 (of which only Rtl is shown in FIG. 4) is controlled. Relay R11 is specifically for resistance heating as is clear from Fig. 5, and the corresponding IJ W-
Contact SrI is closed for a predetermined period of time. Relay R1
4 is energized for microwave operation for a predetermined time, closing the corresponding relay contact 8r4. Relay R12, Rj3
Clock control of the output of the microwave device takes place via contacts r2.8r3 associated with these. A display 4 is provided for displaying time and operating data and operating conditions, which is controlled in a known manner via outputs RO to R6 and 00 to 07 of the microprocessor μP.

In order to preset the time for the cooking process to proceed, press button 6 or 7 depending on whether the setting of the operating time or the setting of the end time is input to operate the clock of contact L2 at the same time as operating the rotary knob 3. When pressed, the corresponding contact L3 is closed.

Contacts 86 and 87 are the start push button 6'! They are subordinate to the height stop push button 7, respectively.

The devices necessary for supplying current are not important to the description of the invention and can be constructed in a conventionally known manner, so their description will be omitted. The voltage for the parts used is Tl0-OV, U
O-241 and UV-a5TI require an AC voltage of 3.5 V to heat the light emitting elements of the display 4. The clock pulses T are produced in a known manner from the operating alternating current.

[Brief explanation of the drawing]

Fig. 1 shows the operation panel of the microwave oven with oven according to the present invention, Fig. 2 shows the opening/closing state of the switching contact by the function selection switch, and Fig. 3 shows the connection diagram of the control circuit of the range.
FIG. 4 shows a detailed connection diagram of the time/program control device. 1...Function selection knob, 2...Push button for output adjustment, 3
...Rotary knob for time adjustment, 4...Display,
5... Indicator light, 6... Start push button, 7... Stop push button, 8... Temperature adjustment knob, E, 3t... Time/program control device, Ri to R3... Heating resistor, ? 1~F
3...Switching contact, Rj1-R14...Relay sMg
...Magnetron. r61111) Substitute patent attorney Tomimura 1.・-]19
．．・;・-j 1-13+, 2+

Claims (1)

Claims: 1) For cooking food or liquids with thermal energy by microwave energy or resistance heating, the microwave energy being adjusted in terms of heating power and heating time using a time and program control device. In the control device for a microwave oven equipped with an oven, a switching means is attached to the time/program control device (2 to 7), so that resistance heating is guided to the food according to the temperature or output setting value even during the microwave operation period. A control device for a microwave oven with an oven, characterized by: 2) A function selection switch (1) is attached to the time/program control device (2 to 7), and this switch allows the control device to be set to “microwave,” “resistance heating with timer,” or “microwave + resistance heating.” 2. The device according to claim 1, wherein each function can be switched alternately.