JPS6110952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency heating apparatus in which heating conditions such as heating time and output of an object to be heated are set and program-controlled using a card.

In general, this type of device, such as a microwave oven, heats cooked food with high frequency according to set heating conditions, that is, cooking conditions, and the setting of the cooking conditions, that is, cooking time and output (high frequency output), Settings are made using a cooking time setting timer, output selector switch, etc. That is, when cooking food, the cook relies on his own experience or intuition and sets the timer to a predetermined time depending on the food to be cooked each time, and also switches the output switch to a predetermined output. , which involves heating and cooking.

However, since the cooking time and output are set based on the experience or intuition of the cook, it is not possible to obtain the optimal cooking time and output for the cooked food.
This may result in insufficient or overheating.
Good cooking was not possible, the quality of the cooking was unstable, and the settings were extremely troublesome.
Furthermore, depending on the type of food being cooked, it may be necessary to sequentially switch and vary the output at predetermined time intervals during the heating operation, but this is almost impossible with manual switching, and even if it were possible, it would be extremely troublesome and extremely difficult. It was inconvenient.

Therefore, there are some methods that control heating cooking using cooking cards with preset heating conditions, but in this case, there are many cooking cards, which is complicated, and handling and storage of cooking cards becomes a problem.When starting cooking, the desired cooking card is selected. There were cases where it became impossible to set heating conditions because there was no one.

The present invention was made in view of the above circumstances, and its purpose is to set the heating conditions such as heating time and output using a card and to control the program to achieve the optimum temperature for all objects to be heated. Heating conditions can be easily and accurately set and controlled, and card handling is simplified.
Furthermore, it is an object of the present invention to provide a high-frequency heating device that can easily and automatically change the output during heating operation.

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, 1 is a housing of a microwave oven, and a heating chamber (not shown) with an open front is housed inside the housing 1, and the ceiling of the heating chamber is A magnetron and a starburst fan (both not shown) are provided, and high frequency waves of about 2450 MHz generated by the magnetron are radiated into the heating chamber, and are diffused by the starfish fan. A door 2 pivotably supported on the left edge of the housing 1 is attached to the front opening of the heating chamber so that it can be opened and closed freely. Panel 3
is installed. A power switch 4 and a cooking switch (push button switch) 5 are provided at the upper front of the operation panel 3, and below each switch 4, 5, cooking condition settings such as heating conditions, cooking time and output are provided. card for
A card setting section or card insertion slot 6 for setting a CD is provided. At the lower part of this card insertion slot 6, inside the operation panel 3, there is a
For example, a card storage box 7 is provided, which can store a large number of cards.
The front surface thereof is open to the front surface of the operation panel 3, and a lid body 8 is pivotally supported in this opening portion 7a so as to be openable and closable. Further, the top surface of the card storage box 7 is also open.

In the card CD, cooking conditions such as cooking time and output of the cooked food are programmed, for example, by punching holes. That is, the above card
As shown in FIGS. 3a to 3c, for example, a CD is formed of a vertically long rectangular card paper, and has seven tracks in the vertical direction, namely output setting tracks ₉₁ to ₉₄ , It is divided into a command setting track ₉₅ , a time setting track ₉₆ , and a transfer track ₉₇ , respectively. Further, in a predetermined area on one surface, the name 10 of the corresponding cooked food is written. However, the transport truck 9
₇ is formed with a punch hole row 11 consisting of a large number of rectangular punch holes P punched at predetermined intervals throughout its length. This punch hole row 11 is inserted into the card by a constant speed transfer mechanism which will be described later.
This is for transporting CDs at a constant speed. In addition, the time setting track ₉₆ includes a transport track _97.
Similarly to the punch hole row 11, a punch hole row 12 is formed corresponding to the punch hole row 11, and a time scale 13 is formed corresponding to the punch hole row 12.
is printed. Note that the zero position of this time scale 13 is set so as to face a detector, which will be described later, when the card CD is set. The punch hole row 12 is used to set the cooking time of the cooked food according to the row length, and the maximum row length is the length _l1 of the card CD. Then, this length _l1 is taken as the maximum value of the cooking time, and the cooking time is set by leaving only the punch hole row corresponding to the desired time and deleting the others. That is, for example, if it is a card for a cooked food that takes 7 minutes to cook, leave the part corresponding to "0 to 7" on the time scale 13 of the punch hole row 12, and leave the other part (the part shown with diagonal lines in the figure). This is to delete (cut). As a result, the length l ₂ of the remaining portion of the punch hole row 12 becomes the set time (7 minutes) at this time. At this time, unnecessary portions (hatched portions) of the punch hole row 11 of the transfer track ₉₇ are also deleted so that the length thereof corresponds to the punch hole row 12 described above. The reason will be explained in detail later. In this way, the cooking time of the cooked food is programmed in the time setting track ₉₆ according to the cooked food.

Furthermore, each of the output setting tracks ₉₁ to ₉₄ has a program set therein according to the cooked food so that a desired output can be obtained. That is, for example, track ₉₁ has an output of 600 watts, track ₉₂ has an output of 400 watts, track ₉₃ has an output of 200 watts, and track ₉₄ has an output of 100 watts. For example, as shown in Figure 4a, the output is initially 600 watts, then 400 watts, and finally
In the case of food that is heated and cooked by changing the heating output to 200 watts at predetermined time intervals (such as food that becomes hard if overcooked), the output setting tracks 9 ₁ , 9 ₂ , 9 ₃ are set as shown in Figure 3a. The punch hole rows 14 ₁ , 14 ₂ , 14 are sequentially punched by a predetermined length corresponding to the punch hole rows 12 of the time setting track 9 ₆ .
form ₃ . Further, a command program for temporarily stopping the heating operation and notifying the user of this at the time of output switching is set in the temporary stop command setting track ₉₅ . In other words, the temporary stop command setting track 9
The above punch hole rows 14 ₁ , 14 ₂ and 14 ₂ of ₅
Punch hole rows 15 ₁ and 15 ₂ are formed at corresponding locations between and 14 ₃ , respectively. For example, as shown in Figure 4b, in the case of foods (such as thawed foods) that are heated and cooked by changing the output in sequence, such as 200 watts at first, then 600 watts, and finally 400 watts, Figure 3. In the case of foods that are heated at a constant output (600 watts) without varying the output as shown in Figure 4 (c), you can do as shown in Figure 3 (c). . In this way, the output setting track 9 _1
9-4 , the optimum output of the cooked food is programmed according to the cooked food, and a large number of card CDs formed as described above are stored in the card storage box 7.

On the other hand, a card guide member 16 is provided in the operation panel 3 corresponding to the card insertion slot 6, and this guide member 16 has an entrance end communicating with the card insertion slot 6 and an exit end communicating with the card insertion slot 6. A card guide groove 17 is formed above the top opening 7b of the box 7. This card guide groove 17 guides the card CD inserted from the card insertion slot 6 and set in a substantially vertical position, and is transferred downward by a constant speed transfer mechanism described later, into the card storage box 7. It is tilted as shown to make it easier to insert and set the card CD.
At the lower end of the card guide member 16, a fifth
A detector 18 and a constant speed transfer mechanism 19 are provided, respectively, as shown in detail in FIGS.

The detector 18 is for detecting the program formed on the card CD as described above, and is, for example, a light source 20, and the detector 18 is for detecting a program formed as described above. a slit member 21 that converts the light into a band-shaped light with a distance of _less than _or equal to the distance between The optical receiver 22 receives the band-shaped light and converts it into an electrical signal. The light receiver 22 is a card CD
The cards are arranged perpendicularly to the transport direction a, and are arranged in a straight line so as to correspond to each of the tracks ₉₁ to ₉₆ of the card CD, for example, as shown by the dashed line in FIG. 3a. The light-receiving elements 22 ₁ to 22 ₆ are arranged as shown in FIG. Also,
The light receiver 22 is set so that each of its light receiving surfaces faces the lower end corresponding to zero of the card CD time scale 13 in the set state. When the card CD is transferred in the direction of _the arrow _a , the card is
The band-shaped light from the slit member 21 is cut off by the CD, but when each punch hole faces the light receiver 22, the band-shaped light from the slit member 21 passes through the punch hole and enters the light receiver 22. Therefore, the light receiver 22 detects this and converts it into an electrical signal.

The constant speed transfer mechanism 19 is for transferring the card CD set in the card guide groove 17 at a constant speed in the direction of arrow a (from top to bottom), and corresponds to the right end of the detector 18, for example. A low-speed motor 23 that rotates at a constant speed, and a row of punch holes connected to the rotating shaft of the motor 23 directly or via a speed reduction mechanism and provided in the transport track ₉₇ for the set card CD. It is composed of a sprocket 24 that meshes with 11 punch holes P. Furthermore, when the card CD is set in the card guide mechanism 17, the punch hole P at the lower end of the punch hole row 11 engages with the sprocket 24, so that the lower end of the card CD faces the detector 18. It is designed to be temporarily stopped. When the card CD is set and the motor 23 is driven, the card CD is guided to the guide groove 17 by the sprocket 24 that meshes with the punch hole row 11, and is transported at a constant speed in the direction of arrow a, and then moves through the punch hole row. 1
When the part 1 is removed, the sprocket 24
When the engagement with the card CD is released, the card CD falls downward due to its own weight and is stored in the card storage box 7, and at the same time, the motor 23 stops rotating and its heating operation is also stopped. .

In Fig. 2, the card CD in the card storage section 7 is shown standing upright, but in reality, by appropriately determining the dimensions of the card storage section 7, the card can be stored at an angle, or it can be stored with the card already stored. Naturally, it is necessary to prevent troubles caused by collisions between cards newly transferred to the storage section.

Next, the control circuit shown in FIG. 8 will be explained. The AC power supply 31 includes a main contact 4 of an electromagnetic switch 41, which will be described later.
1 ₁ , 41 ₂ and the bidirectional thyristor 32 are connected in series to the primary coil 33 ₁ of the high voltage transformer 33 . The high voltage secondary coil ₃₃₂ of this transformer 33 is connected to the anode of a magnetron 35 via a rectifier circuit 34 consisting of a capacitor C and a diode D, and the heater of this magnetron 35 is connected to the low voltage secondary coil 333 of the transformer _33.
connected to. Further, the power supply 31 is connected to the output switching setting circuit 3 via the main contacts 41 ₁ and 41 ₂ .
6 is connected.

This output switching setting circuit 36 is connected to the detector 18.
This is a circuit for switching and setting the thyristor 32 on and off according to each output signal and controlling the power supplied to the magnetron 35 so as to obtain a desired output. The oscillation frequency of this oscillator is detected by the detector 18.
A frequency setting circuit that switches and sets the frequency according to each output signal of the thyristor 3 according to the output signal of the oscillator.
The thyristor 32 is configured by a gate control circuit that controls the gates of the thyristor 32 and turns the thyristor 32 on and off. That is, for example, when the detection signal of the punch hole row 14 ₁ is supplied from the light receiving element 22 ₁ of the light receiver 22, while the detection signal is supplied, the corresponding output is 600 watts in this case. By setting the oscillation frequency of the oscillator to a predetermined value, the frequency setting circuit sets the ratio of the on time and off time of the thyristor 32 to a predetermined value, and the detection signal of the punch hole array 14 ₂ is supplied from the light receiving element 22 ₂ . Then, while the detection signal is being supplied, the same operation as above is performed so that the corresponding output is 400 watts in this case, and the detection signal of the punched hole row _14-3 is supplied from the light receiving element _22-3 . Then, while the detection signal is being supplied, the same operation as above is performed so that the corresponding output is 200 watts in this case. Furthermore, when the detection signal of the punched holes 15 ₁ and 15 ₂ is supplied from the light receiving element 22 ₅ of the light receiver 22, the gate control circuit temporarily stops its operation and keeps the thyristor 32 in the off state for a predetermined period of time. ing. That is, the heating operation is temporarily stopped when switching the output. Also,
The detection signal from the light receiving element ₂₂₅ is also supplied to an alarm drive circuit 37, thereby operating an alarm 38 for a predetermined period of time. In other words, the alarm 38 is activated for a predetermined period of time when the output is switched, and the cook is notified of this.

The power source 31 also includes the power switch 4.
A light source 20 of the detector 18 is connected via the
A relay control circuit 39 is connected in parallel to this light source 20. This relay control circuit 39 is a circuit that controls the relay 40 according to the output signal of the light receiving element ₂₂₆ of the light receiver 22. For example, when the band-shaped light from the slit member 21 is incident on the light receiving element ₂₂₆ , When the detection signal is being supplied, the relay 40 is held in a de-energized state, and when the light incident on the light receiving element ₂₂₆ is cut off at its lower end due to the setting of the card CD, the relay 40 is energized, This biased state is maintained while the light receiving element ₂₂₆ detects the slit hole row 12 as the card CD is transported, and when the card CD is transported to the removed portion of the punch hole row 12, the light receiving element 226 detects the slit hole row 12. ₆ no longer detects the punch hole row 12, the relay 40 is deenergized. Therefore, an electromagnetic switch 41 is connected in parallel to the light source 20 via the cooking switch 5 and the normally open contact 40a of the relay 40 in series, and the electromagnetic switch 41 is connected to the motor 23. connected in parallel. The cooking switch 5 also includes a normally open auxiliary contact 4 of the electromagnetic switch 41.
1 _{and 3} are connected in parallel, so that the electromagnetic switch 4
1 self-holding circuit is formed.

Next, the operation in the above configuration will be explained. First, the power switch 4 is turned on and the desired cooked food is placed in the heating chamber. When the power switch 4 is turned on, the light source 20 lights up and the relay control circuit 39 is energized. At this time, since the card CD has not yet been set, the light receiving element 22
₆ receives the band-shaped light from the slit member 21 and supplies the detection signal to the relay control circuit 39, thereby keeping the relay 40 in the de-energized state. Therefore, the normally open contact 40a of the relay 40 is in an open state, and even if the cooking switch 5 is pressed at this time, the electromagnetic switch 41 does not operate. In this state, insert the card CD corresponding to the name of the cooked food set in the heating chamber.
The cooking conditions are set by selecting and taking out the card CD from the storage box 7, inserting the card CD into the card insertion slot 6, and setting it in the card guide groove 17. For example, assume that the card CD shown in Figure 3a is set. When the card CD is set,
Since the band-shaped light from the slit member 21 is cut off at the lower end of the card CD, the detection signal is supplied from the light receiving element ₂₂₆ to the relay control circuit 39, so that the relay 40 is energized and its normal state is The open contact 40a is closed.

However, by pressing the cooking switch 5,
The electromagnetic switch 41 is energized and its auxiliary contact 41 ₃
The main contact 41 ₁ ,
₄₁₂ is closed, and the motor 23 is also energized and rotates. When the motor 23 rotates, the set card CD is transferred at a constant speed in the direction of arrow a by the constant speed transfer mechanism 19. When the transfer of the card CD starts, almost simultaneously the light receiving element 22 ₁ first detects the punch hole row 14 ₁ , and the light receiving element 2
₂₆ detects the punch hole row 12. This results in
The detection signal of the punch hole row 14 ₁ is supplied from the light receiving element 22 ₁ to the output switching setting circuit 36 , and the detection signal of the punch hole row 12 is supplied from the light receiving element 22 ₆ to the relay control circuit 39 . Therefore, the output switching setting circuit 36 connects the main contacts 41 ₁ , 41
Since power is supplied by the closing of thyristor ₃₂ , first turn on thyristor 32 to output 600 watts.
on-off control. As a result, the magnetron 35 operates in oscillation by being supplied with the corresponding power, and radiates high frequency waves into the heating chamber.
Start cooking with an output of 600 watts.

As the transfer of the card CD progresses and the punch hole row 14 ₁ finishes passing through the light receiving element 22 ₁ , the light receiving element 22 ₁
The punch hole row 14 ₁ is no longer detected, and at the same time, the light receiving element 22 ₅ detects the punch hole 15 ₁ . When the light receiving element ₂₂₅ detects the punched hole ₁₅₁ , the detection signal is supplied to the output switching setting circuit 36, so the output switching setting circuit 36 holds the thyristor 32 in the OFF state for a predetermined period of time, so that the magnetron 35 is turned off. Since the power supply is cut off, the operation is stopped during that time, and the heating operation is temporarily stopped. At this time, the detection signal from the light-receiving element ₂₂₅ is also supplied to the alarm drive circuit 37, so the alarm 38 is activated to notify the cook that the heating operation has been temporarily stopped (that is, the output has been switched). Notification will be made. Then, the transfer of the card CD further progressed,
When the punched hole 15 ₁ finishes passing through the light receiving element 22 ₅ , the light receiving element 22 ₅ no longer detects the punched hole 15 ₁ , and almost at the same time, the light receiving element 22 ₂ starts detecting the punched hole row 14 ₂ . Light receiving element 22
₂ detects the punch hole row ₁₄₂ , the detection signal is supplied to the output switching setting circuit 36, and the output switching setting circuit 36 then controls the thyristor 32 to turn on and off so that the output is 400 watts. do. As a result, the magnetron 35 operates in oscillation by being supplied with the corresponding power, and then heats and cooks with an output of 400 watts.

As the card CD continues to be transferred, punch hole row 1
4 ₂ finishes passing through the light receiving element 22 ₂ , the light receiving element 22 ₂ no longer detects the punched hole row 14 ₂ , and at the same time, the light receiving element 22 ₅ detects the punched hole row 14 2 .
5 Detect ₂ . The light receiving element 22 ₅ is the punch hole 15
₂ , the output switching setting circuit 36 operates in the same manner as when detecting the punched hole ₁₅₂ , and temporarily stops the heating operation. Also, at this time, the alarm 38 is activated in the same manner as described above. Then, as the transfer of the card CD progresses and the punched hole ₁₅₂ finishes passing through the light receiving element ₂₂₅ , the light receiving element ₂₂₅ passes through the punched hole _152.
is no longer detected, and almost at the same time, the light receiving element 22
₃ starts detecting the punch hole row ₁₄₃ . When the light receiving element 22 ₃ detects the punch hole row 14 ₃ ,
Since the detection signal is supplied to the output switching setting circuit 36, the output switching setting circuit 36 then controls the thyristor 32 on and off so that the output is 200 watts. As a result, the magnetron 35 operates in oscillation by being supplied with electric power corresponding to this, and then heats and cooks with an output of 200 watts.

As the card CD continues to be transferred and reaches the part where the punch hole rows 11 and 12 are removed,
Since the constant speed transfer mechanism 19 is disengaged from the sprocket 24, the card CD falls downward under its own weight and is automatically stored in the card storage box 7.
Further, at this time, since the light receiving element ₂₂₆ no longer detects the punch hole row 12 due to the falling of the card CD, the relay control circuit 39 deenergizes the relay 40. When the relay 40 is deenergized, its normally open contact 40a opens, so the electromagnetic switch 41 is released from self-holding and deenergized, and the motor 23 is de-energized and stops rotating. . When the electromagnetic switch 41 is deenergized, the main contacts 41 ₁ , 41 ₂
Since the magnetron 35 is opened, the power supply to the magnetron 35 is cut off, and the magnetron 35 therefore stops its oscillation operation and finishes cooking. Therefore, the output change state in this case is as shown in FIG. 4a.

In this way, cooking conditions such as the cooking time and output of the cooked food are programmed on the card using the punch holes according to the cooked food, and when cooking, by setting the card for the cooked food, the cooking conditions can be set and programmed. It is something to control. Therefore, conventional experience can be stored as a card, and by simply setting the card, optimal cooking conditions for all cooked foods can be easily and accurately set and controlled. As a result, good cooking is possible, and the quality of the cooking is evened out and stabilized. In addition, when heating and cooking is performed while changing the output sequentially at predetermined intervals, such as when cooking foods that become hard if overcooked, defrosted foods, or uneven cooking, this can be done easily and automatically. It is extremely convenient and can be used in a wide range of applications.

Note that in the above embodiment, the constant speed transfer mechanism 19
A constant speed motor 23 was used, but
For example, by using a motor that can change the speed in several stages, and by changing the speed of the motor with a changeover switch, etc., and changing the transfer speed of the card CD depending on the weight of the cooked food, the time coefficient can be adjusted according to the weight of the cooked food. may be variably controlled. For example, the cooking time programmed on the card CD is the time for one serving, and if the cooking time is for three people, the card CD is transferred in three times the time. In this way, the cooking conditions can be similarly set and program-controlled for foods for any number of people on one card.

Furthermore, although the cooking conditions are programmed on the card CD using a row of punched holes, they may also be programmed using, for example, slit holes of a predetermined length, optical marks, or a row of optical marks.
The cooking conditions may be programmed by magnetically recording electric signals on the magnetic card, and the cooking conditions may be detected by a magnetic head or the like, and the means for programming the cooking conditions may be arbitrary. In addition, although cooking conditions such as cooking time and output are programmed on the card CD, if there is a turntable that rotates while moving up and down in the heating chamber, its control commands may also be programmed as cooking conditions. . Further, for example, a conventional manual timer may also be provided and controlled by the manual timer by switching with a changeover switch.

In addition, the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

As detailed above, according to the present invention, the heating conditions such as heating time and output are set and program-controlled using the card, so just by setting the card, the optimum heating conditions for all the objects to be heated can be set. Heating conditions can be easily and accurately set and controlled, resulting in good heating and extremely stable heating performance. Since all you have to do is select and set the desired card, handling of the card is easy, the card can be protected, heating can be simplified, and the output can be easily switched and varied during heating operation. Moreover, it can be performed automatically, and a high-frequency heating device that is extremely convenient and has great practical effects can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a front view of the high-frequency heating device, FIG. 2 is a longitudinal cross-sectional side view of the main parts, FIGS. 3 a to c are configuration diagrams of the card, and FIG. 4 a to c are diagrams showing the state of output change, and Figure 5 is the second diagram.
A transparent front view from the direction of arrow A-A in the figure,
6 is a view taken along the line B--B in FIG. 5, FIG. 7 is a perspective view showing the detector and constant speed transfer mechanism, and FIG. 8 is a configuration diagram of the control circuit. 6...Card set section, 7...Card storage section,
CD...Card, ₉₁ to ₉₄ ...Output setting track, ₉₅ ...Pause command setting track, ₉₆ ...
...Time setting track, 9 ₇ ...Transfer track, 1
1... Punch hole row for card transfer, 12... Punch hole row for time setting, 13... Time scale, 14 ₁ to 1
4 ₃ ... Punch hole row for output setting, 15 ₁ , 15 ₂
... Punch hole for temporary stop command, 16 ... Card guide member, 17 ... Card guide groove, 18 ... Detector, 19 ... Constant speed transfer mechanism, 32 ... Thyristor, 35 ... Magnetron, 36 ... Output switching setting circuit, 38...alarm.

Claims (1)

[Claims] 1. A high-frequency heating device that heats an object to be heated using high-frequency waves according to set heating conditions, which includes a card on which heating conditions such as heating output and heating time are set in advance, and a card insertion slot provided in the main body of the device. a card guide member for detecting heating conditions set on the card; a detector for detecting the heating conditions set on the card; and a card guide for ejecting the card from the card guide member after detecting the heating conditions. A card guide groove provided in the member,
A high-frequency heating device comprising: a card storage section provided in the main body of the device below the card guide groove.