JPH0268883A - High frequency heating device - Google Patents

Abstract

PURPOSE:To enable the heating of a food regardless of commercial frequencies by providing a doubled scale so that the time limit obtained by 50Hz commercial power source becomes 1.2 times the time limit obtained by 60Hz commercial power source when a time switch driven by a spiral spring is operated. CONSTITUTION:A time switch 10 is driven by a spiral spring, and doubled scales 11, 12 for 50Hz and 60Hz uses are provided so that the time limit obtained by a commercial power source of 50Hz becomes 1.2 times the time limit obtained by the commercial power source of 60Hz. Hence, the integrating amount by the product of the high frequency output and heating time when a food is heated at 50Hz is made identical with the integrating amount at 60Hz, and the food cooking can be carried out uniformly regardless of 50Hz, 60Hz commercial frequencies.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency generator of a high-frequency heating apparatus for cooking food using high-frequency waves, and a timer of a timer.

2. Description of the Related Art In general, a high-frequency generator for a microwave oven, as shown in FIG.
, and magnetron 5 is connected in parallel to high voltage diode 2.
was connected and configured. Furthermore, in order to set the heating time of the food, a time switch 6 as a timer is connected in series with the primary winding 7 of the high voltage transformer 3 to protect the commercial power source 8. However, in such a high frequency generator, even if the high frequency output at the commercial frequency of 50 Hz is 500 W, at 60 Hz, a high frequency output of 600 W or more can be obtained.
There was an opening in Japan where food was overcooked when heated for a certain amount of time. For this reason, in the past, high-frequency output was kept constant using dedicated high-voltage transformers, high-voltage capacitors, and time switches depending on the commercial frequency.

As another method, as shown in Fig. 6, the high-voltage capacitor 9 of the high-frequency generator has two capacitances, and a switching relay 10 is provided to switch the capacitance according to the commercial frequency 8, thereby keeping the high-frequency output constant. Ta. (Tokuko Showa 53-1
9091 Publication) Problems to be Solved by the Invention However, using a dedicated high-voltage transformer, high-voltage capacitor, and time switch depending on the commercial frequency as in the former method is difficult to achieve even if the model is of the same model with 50Hz specifications, 6
The product had to be manufactured using different parts while taking into account the 0Hz specification, which caused problems in terms of production management and product management. Furthermore, when a consumer moves to an area with a different commercial frequency after purchasing a microwave oven, it is necessary to replace it with a dedicated high-voltage transformer, high-voltage capacitor, or time switch that corresponds to the frequency, which burdens the consumer with the cost of parts. However, there was also the problem that it took time and effort to replace the product at the store.

Furthermore, the latter method also requires a microprocessor to determine the commercial frequency, or requires a changeover switch to be provided outside the device so that the user can switch according to the commercial frequency. As a result, parts costs were high, and there were safety issues due to malfunctions of the microprocessor and erroneous operation of the changeover switch on the outside of the device.

The present invention solves these conventional problems,
To provide an excellent high-frequency heating device that has a simple configuration and can heat food regardless of the commercial frequency of 50 Hz or 60 Hz.

Means for Solving the Problems The high-frequency heating device of the present invention includes a high-frequency generator consisting of a high-voltage transformer, a high-voltage capacitor, a high-voltage diode, and a magnetron, and a commercial power supply connected to the primary winding of the high-voltage transformer, which is turned on and off according to time limits. Equipped with a time switch, a scale showing numbers or symbols corresponding to the time limit, and a pointer for setting the time limit, the high frequency output obtained with a 60 Hz commercial power supply is 1.1 of the high frequency output obtained with a 50 Hz commercial power supply. Configure the high frequency generator to increase the frequency by ~1.3 times,
Drive the time switch with a mainspring and set the scale to 50H.
z and 60Hz, and operate the time switch by aligning the pointer with the same number or symbol on the scale depending on the commercial frequency used, the time limit obtained with a 50Hz commercial power supply will be the same as the time limit obtained with a 60Hz commercial power supply. 1.
It is configured to double in size.

Function The high frequency generator for a microwave oven of the present invention is configured such that the high frequency output obtained from a 60Hz commercial power supply is 1.1 to 1.3 times the high frequency output obtained from a 50H2 commercial power supply, and the time switch is Driven by a mainspring, set the scale to 50
When the time switch is set to double for Hz and 60HI, and the pointer is set to the same number or symbol on the scale depending on the commercial frequency used, the time limit obtained with a 50Hz commercial power source is 6 (D4z commercial frequency). It is configured to be 1.2 times the time limit obtained from the power supply, so it is 50
The integrated amount based on the product of the high frequency output that heats food and the heating time when the frequency is 60 Hz is the same as the integrated amount that is the product of the high frequency output that heats the food and the heating time when the frequency is 60 Hz. It provides a constant amount of energy to the food regardless of the temperature, allowing for uniform food cooking. Furthermore, there is no need to use dedicated high frequency generators for 50Hz and 60Hz, and
This eliminates the need for high-voltage capacitors and changeover switches that are switched at 0Hz.

EXAMPLE Hereinafter, a high frequency heating device according to an example of the present invention will be explained with reference to the drawings.

As shown in FIG. 1, the operation unit 10 has a 50Hz scale 11 representing numbers corresponding to the cooking time of the food, a 60Hz scale 12, and a knob that rotates in conjunction with the time switch main shaft 13. 14, and the knob 14 is provided with a pointer 15.

In addition, as shown in FIG. 2, a half-wave voltage doubler rectifier circuit is formed by a high-voltage capacitor 16 and a high-voltage diode 17, and is connected to a secondary winding 19 of a high-voltage transformer 18, and a magnetron is connected in parallel to the high-voltage diode 17. 20 are connected to constitute a high frequency generator.

In addition, in order to set the heating time of the food, a time switch 21 driven by a mainspring is installed as a timer on the high voltage transformer 1.
It is connected in series with the primary winding 22 of 8 to protect the commercial power supply 8. In addition, this high frequency generator has a high voltage transformer 1
The relationship between the primary voltage and high frequency output of 8 is the commercial frequency 50H.
As shown in Fig. 3, which shows a comparison of frequencies of 1 and 60 Hz, when the primary voltage of the high voltage transformer 18 is 00 V, the high frequency output of 50 Hz is P2O, and the high frequency output of 60 Hz is P2.
If O, then the configuration is such that there is a relationship of P60=L2XP50. Also, even though the 50Hz scale 11 and the 60Hz scale 12 are the same number, the angle from the 0 point is 50H.
The z scale 11 has an angle 1.2 times that of the 60 Hz scale 12.

Therefore, when setting the heating time, time switch 21
Adjust the pointer 15 of the knob 14 to 50Hχ according to the commercial frequency.
Since the time switch 21 is driven by a mainspring, the rotation of the time switch main shaft 13 is constant even if the number is set to the 50Hz scale 11 or the 60Hz scale 12.
If the time limit of z is 750 and the time limit of 60 Hz is 760, the relationship is T50=1.2XT60. Therefore, 5
The integrated amount obtained by multiplying the high-frequency output that heats the food and the heating time when the frequency is 0Hz is the same as the integrated amount obtained by multiplying the high-frequency output and the heating time that heats the food when the frequency is 60 Hχ.
Commercial frequency 50Hz.

A constant amount of energy is given to the food regardless of the 5QHz, making it possible to process uniform products.

Furthermore, there is no need to use high-voltage transformers, high-voltage capacitors, or time switches dedicated to 50Hz and 60Hz (in addition, there is no need to use dual-capacity high-voltage capacitors or changeover switches that switch between 50Hz and 60H1, and production management In addition to being advantageous in terms of product management, when a consumer moves to an area with a different commercial frequency after purchasing a microwave oven, it is no longer necessary to replace the dedicated high-voltage transformer, high-voltage condenser, and time switch according to the frequency. (, the burden of parts costs on the consumer,
There is no need to replace it at the store (which is even more advantageous).

The operation unit 10 has a 50Hz scale 11 representing numbers corresponding to the cooking time of the food, a 60Hz scale 12, a knob 14 that rotates in conjunction with the time switch main shaft 13, and a knob 14 that rotates in conjunction with the time switch main shaft 13. In addition to the pointer 15, as shown in FIG. 4, a knob 24 rotating in conjunction with the time switch main shaft 23 has a 50Hz scale 25 indicating numbers corresponding to the cooking time of the food, and a 60Hz scale.
When setting the heating time, set the 50Hz Jll LI for the commercial frequency to be used written on the knob 24 of the time switch 21.
Pointer 2 on number 25 or scale 26 for 608Z
It goes without saying that the same effect can be obtained by combining 8.

Effects of the Invention As described above, the high frequency generator for microwave ovens of the present invention has the following advantages:
The integrated amount of food heated by the product of high frequency output and heating time is the same regardless of the commercial frequency of 50 Hz or 60 Hz, giving the same energy to food and making it possible to cook food uniformly. It has an effect like this.

■ Even if the model is the same, it is no longer necessary to use dedicated high-voltage transformers, high-voltage capacitors, time switches, etc. depending on the 50Hz or 60Hz specifications, and it is now possible to use dedicated parts depending on the frequency during production, and to adjust the characteristics standards for product inspection. There is no longer a need to switch or display shipping classifications, which improves productivity.

■ There is no longer a division into 50Hz specifications and 60H1 specifications, so there is no longer a need for separate storage during product inventory, and there is no longer a need to ship products according to commercial frequencies. We predict the demand and stock it, even when there is a shortage of frequency areas in some areas and surplus in other areas.
There is no need to transfer the product regionally or modify the frequency-specific parts of the product (this makes the product management ball very convenient.

■ Even if a consumer moves to an area with a different commercial frequency after purchasing a microwave oven, there is no need to modify the frequency-specific parts of the product, eliminating the burden of parts costs on the consumer and the hassle of replacing them at a retailer. It turned out to be very convenient.

■ Depending on the commercial frequency to be used, there is no need for extra electronic circuits such as a microprocessor, 2-capacity high-voltage capacitor, or changeover switch to determine the commercial frequency, so malfunction of the microprocessor or changeover switch is prevented. It is possible to prevent the occurrence of danger due to

Alternatively, a method in which a changeover switch is provided outside the device body and the user switches the switch according to the commercial frequency can also prevent the user from forgetting to operate the switch or from erroneously operating the switch.

[Brief explanation of the drawing]

Fig. 1 is a front view of the operating section of a high-frequency heating device according to an embodiment of the present invention, Fig. 2 is its circuit diagram, and Fig. 3 is the relationship between the primary voltage of the high-voltage transformer of the high-frequency generator and the high-frequency output. FIG. 4 is a characteristic diagram showing . 8...Commercial power supply, 10.27...Operation unit, 11.25...50Hz scale, 12.
26...60Hz scale, 13.23...
... Time switch main axis, 14/24... Knob, 15/28... Pointer. Name of agent: Patent attorney Shigetaka Awano (1 person)
---1 grandson I'to section//---, 5OHZ IL') 12-= 60 Hz HIl 13- Time switch main shaft 14--Full reading I5- Finger nail Figure 1 Figure 3 f7X electric corridor 23- Time switch spindle 24- Reading;

Claims (1)

[Claims] A high-frequency generator consisting of a high-voltage transformer, a high-voltage capacitor, a high-voltage diode, and a magnetron, and whose high-frequency output obtained from a 60Hz commercial power supply is 1.1 to 1.3 times the high-frequency output obtained from a 50Hz commercial power supply; It is equipped with a time switch that turns on and off the commercial power supply connected to the primary winding of the high-voltage transformer according to a time limit, a scale indicating numbers or symbols corresponding to the time limit, and a pointer for setting the time limit, and the time switch is connected to the main winding. When the time switch is operated by aligning the pointer with the same number or symbol on the scale depending on the commercial frequency used, 50
The scale is set by 50 so that the time limit obtained with a 60 Hz commercial power source is 1.2 times the time limit obtained with a 60 Hz commercial power source.
High-frequency heating device with dual configuration for Hz and 60Hz.