JP2001082744A - Microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microwave oven capable of improving operability of recycling and alleviating maintenance after recycling by accurately grasping a residual life of a magnetron. SOLUTION: The microwave oven comprises a magnetron 43 for oscillating a microwave, a voltage supply means 50 for supplying a filament voltage to a filament 43a of the magnetron, a voltage varying means 49 for varying the filament voltage, a fault sensing means 34 for sensing the abnormal oscillation of the magnetron 43, a memory 44 for storing information for specifying a residual life or heating efficiency of the magnetron from the filament voltage abnormally oscillated by the magnetron, and an arithmetic unit for calculating the life or efficiency of the magnetron 43 based on the sensed result of the means 34 and the information stored in the memory 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a microwave oven.

[0002]

2. Description of the Related Art A conventional microwave oven is disassembled at the time of disposal, and its components are recycled. The user of the microwave oven informs a recycling maker at the time of disposal, and the recycling maker recycles resources by a recycling method according to each component. Recycling information required at the time of disposal is obtained in writing or verbally, and users and recycling manufacturers can recycle using the optimal route and method based on the recycling information.

[0003] Here, the recycling information required at the time of disposal is the name, model number, material, date of manufacture, serial number, manufacturer name, recycling method, name of the recycling manufacturer, contact information of the recycling manufacturer, etc. of each component. .

[0004] Some components of the electric range are deteriorated by long-term use. For this reason, the operating time of the electric range is stored, and the usage time of the component obtained from the operating time is referred to materials, documents, and the like, and the remaining life of the component is estimated. As a result, components having a sufficient remaining life are recycled, and components having a short remaining life are discarded, so that efficient recycling is performed.

[0005] The opening and closing door for opening and closing the cooking chamber of the microwave oven is formed by inserting a glass plate into the front.
FIG. 24 shows a cross-sectional view of the door 10. The frame 11 has a rectangular recess 11 b. A glass plate 13 is inserted into the concave portion 11b, and a gap between the glass plate 13 and the frame 11 is filled with a filler 12 such as silicon rubber, and the glass plate 13 is fixed to the frame 11.

When recycling the glass plate 13 and the frame 11, the filler 12 is cut by a cutting tool such as a cutting tool as shown by a dashed line 14. Then, the glass plate 13 is separated from the frame 11 to separate the glass plate 13 from the frame 11.

[0007]

However, according to the conventional microwave oven, since the recycling information is obtained in writing or verbally, it is not only necessary to keep the writing but also to search the writing contents or obtain information by telephone or the like. Need to do. Therefore, it takes effort to obtain recycling information,
There was a problem that it was not possible to recycle quickly.

Further, in the case where recycling is performed by estimating the remaining life based on the use time of the component parts, it is necessary to obtain the remaining life by referring to materials, documents, etc., and it is time-consuming to carry out the recycling efficiently. There is a problem that cannot be done.

[0009] Furthermore, the individual products of the component parts have variations in life. For this reason, according to the estimation of the service life based on the usage time, even if it is determined that recycling is possible, it will not be possible to use it in a short time after recycling and maintenance costs such as replacement will be costly. There was also the problem of wasting resources that could be used. In particular, the magnetron, which is a key component of a microwave oven, has a variation in service life from several hundred hours to several thousand hours depending on the individual product, and increases maintenance costs and wastes resources.

Further, when the door 10 is recycled, it is difficult for the cutting tool to move straight around the glass plate 13 smoothly. Into the filler 12. As a result, the cut ends become discontinuous and the frame body 11 and the glass plate 13 cannot be separated, and there is a problem that the number of steps is increased because the cutting is repeated many times.

Further, the recess 11b and the glass plate 13 are integrated by the filler 12 fixed to the flat portion 11b 'even after the filler 12 is cut. For this reason, there was a problem that separation was difficult and man-hours were required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a microwave oven capable of easily obtaining recycling information and a remaining life of a component to improve operability of recycling.

Another object of the present invention is to provide a microwave oven capable of accurately grasping the remaining life of the magnetron and improving the workability of recycling and reducing maintenance after recycling.

Another object of the present invention is to provide a microwave oven that can easily disassemble an opening / closing door and reduce man-hours during recycling.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a recycle information storage unit for storing recycle information for reusing component parts, and information stored in the recycle information storage unit. A display unit for displaying, a control unit for controlling the recycle information storage unit and the display unit, and a control panel in which the display unit is incorporated are provided.

According to this configuration, when the microwave oven is discarded, the user displays the recycle information stored in the recycle information storage unit on the display unit, obtains the contact information of the recycle manufacturer, and contacts the recycle manufacturer. The recycle maker displays the recycle information on the display unit, obtains information such as the recycle method, and efficiently recycles the collected microwave oven.

Further, according to the present invention, in the microwave oven having the above configuration, the recycling information storage section and the control section are integrally incorporated in the control panel, and the recycling information storage section is detached from the microwave oven body. Power is supplied to the storage unit, the display unit, and the control unit. According to this configuration, even in a state where the microwave oven is disassembled and the control panel is separated, the recycling information is obtained, and the recycling is performed by an optimal method.

Further, a display permission switch for permitting the display section to display the recycle information is provided on the back surface of the control panel. According to this configuration, the display permission switch can be turned on when the microwave oven is disassembled. As a result, recycling information necessary for the recycling maker is obtained.

The control panel is provided with a key input section for permitting display of the recycle information on the display section by key operations in a predetermined order. According to this configuration, a recycling maker permitted to recycle inputs from the key input unit in a predetermined operation order, and the recycling information is obtained.

In addition, a recycle key for permitting display of predetermined recycle information on the display section by key operation is provided on the front of the control panel. According to this configuration, the recycle information is acquired by turning on the recycle key.

Further, the apparatus has an external input terminal capable of inputting information from an external device. According to this configuration, a CD-ROM, a telephone line, or the like is connected via the external input terminal, so that a user or a recycling maker can obtain more detailed recycling information.

The present invention also provides a storage unit for storing an operation history of a component and characteristic information from which the remaining life of the component can be derived from the operation history, and a storage unit for storing the operation history and the characteristic information based on the operation history. A calculating unit for calculating the remaining life of the component. According to this configuration, the remaining life of the component is obtained by the arithmetic unit by comparing the operation history such as the use time and the number of times of use of the component stored in the storage unit with the characteristic information of the component. This determines the disposal or recycling of the component.

According to the present invention, there is provided a characteristic detecting means for detecting a characteristic of a component, a storage unit for storing characteristic information capable of deriving a remaining life of the component from the characteristic of the component, A calculating unit for calculating the remaining life of the component based on the detection result and the characteristic information.

According to this configuration, the remaining life of the component is obtained by the arithmetic unit by comparing the characteristic of the component detected by the characteristic detecting means with the characteristic information stored in the storage unit. This determines the disposal or recycling of the component.

According to the present invention, in the microwave oven having the above-mentioned configuration, the component is a magnetron that oscillates microwaves, and the arithmetic unit calculates the remaining life or heating efficiency of the magnetron.

According to this configuration, the remaining life of the magnetron is obtained by the calculation unit based on the characteristics or the operation history of the magnetron detected by the characteristic detecting means. This determines the disposal or recycling of the magnetron. Further, the heating efficiency of the magnetron is determined by the calculation unit based on the characteristics or operation history of the magnetron. This allows the user to make fine adjustments to the cooking conditions.

The present invention also provides a magnetron that oscillates microwaves, voltage supply means for supplying a filament voltage to a filament of the magnetron, voltage variable means for varying the filament voltage, and detecting abnormal oscillation of the magnetron. An abnormality detection unit, a storage unit that stores information from which the remaining life or heating efficiency of the magnetron can be derived from a filament voltage at which the magnetron oscillates abnormally, a detection result of the abnormality detection unit, and information stored in the storage unit And a calculating unit for calculating the remaining life or the heating efficiency of the magnetron based on the calculation.

According to this configuration, the abnormal oscillation of the magnetron is detected by the abnormality detecting means by changing the filament voltage. By comparing the filament voltage at that time with the information stored in the storage unit, the arithmetic unit determines the remaining life or heating efficiency of the magnetron. The result of calculating the remaining life of the magnetron determines the disposal or recycling of the magnetron. Further, the user can finely adjust the cooking conditions based on the calculation result of the heating efficiency of the magnetron.

According to the present invention, in the microwave oven having the above-mentioned configuration, the abnormality detecting means detects a current flowing to a primary side of the voltage supply means.

Further, the present invention is characterized in that in the microwave oven having the above-mentioned configuration, the voltage varying means varies an impedance on a primary side or a secondary side of the voltage supply means.

Further, the present invention is characterized in that in the microwave oven having the above-mentioned configuration, the voltage variable means switches and connects a plurality of resistors to a secondary side of the voltage supply means.

The present invention also provides the microwave oven having the above configuration, comprising: an internal power supply for supplying a voltage from a commercial power supply to the voltage supply means; and an external power supply capable of applying a voltage different from the internal power supply to the voltage supply means. The voltage varying means switches between the external power supply and the internal power supply.

Further, the present invention is characterized in that the microwave oven having the above configuration is provided with a display unit for displaying the remaining life or heating efficiency of the magnetron.

Further, the present invention is characterized in that in the microwave oven having the above structure, a notifying means for notifying a user in accordance with the heating efficiency of the magnetron is provided.

Further, the present invention is characterized in that in the microwave oven having the above structure, the heating time by the magnetron is varied during cooking according to the heating efficiency of the magnetron.

Further, the present invention provides a cooking object comprising a frame having a concave portion, a glass plate to be filled in the concave portion, and an opening / closing door comprising a filler filled in a gap between the glass plate and the wall surface of the concave portion. In the microwave oven which opens and closes the front of the cooking chamber in which the frame is placed, the frame has a groove recessed in the recess along the outer peripheral edge of the glass plate.

According to this configuration, the recess is provided with a groove along the outer peripheral edge of the glass plate. At the time of recycling the door, the tip of the cutting tool for cutting the filler is inserted into the groove, and the cutting tool advances by the guide of the groove to cut the filler.

Further, the present invention is characterized in that in the microwave oven having the above structure, at least a part of the groove is formed so as to overlap the glass plate. According to this configuration, when the filler is cut, the separation tool for separating the glass plate and the frame is inserted into the groove, and the tip of the separation tool enters a position overlapping the glass plate. Then, the glass plate is detached from the frame by pushing up the contact surface between the glass plate and the concave portion.

[0039]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a microwave oven according to one embodiment. The microwave oven main body 1 is provided with a cooking chamber (not shown) on which the food is placed, and the front of the cooking chamber can be opened and closed by an opening / closing door 10. A control panel 20 is provided on the right side of the door 10.

The control panel 20 is provided with an operation section 31 for inputting a cooking method and the like by key operation, and a display section 32 composed of a liquid crystal panel or the like. The back surface of the control panel 20 is as shown in FIG. 2, and a computer unit 23 for controlling the driving of the microwave oven is provided.

FIG. 3 is a block diagram showing the configuration of the microwave oven according to this embodiment. The input by the operation of the operation unit 31 is sent to the control unit 41. In response to the input, the heating sequence stored in the storage unit 44 is called by the control unit 41, and a driving unit 42 such as a magnetron 43 for heating the food is heated.
Are driven according to the heating sequence. In addition, information such as cooking recipe information stored in the storage unit 44 can be displayed on the display unit 32 by the input.

The control unit 41 controls a plurality of sensors 33 for detecting the temperature and humidity in the cooking chamber or the weight of the cooking chamber.
The driving unit 42 is controlled by the output from the sensor 33, so that cooking can be performed satisfactorily. Further, the control unit 41 supplies a power to each of the components, a characteristic detection unit 34 for detecting the characteristics of each of the components of the microwave oven main body 1, a calculation unit 35 for performing a calculation of a heating sequence corresponding to the cooking object, a timer 36, and the like. The power supply unit 37 is controlled. Here, the control unit 4
1, storage unit 44, calculation unit 35, timer 36, and power supply unit 3
7 is integrated and formed in a computer section 23 (see FIG. 2).

The storage section 44 is composed of a rewritable memory such as an EEPROM, and stores safety control information, recycling information, history information, characteristic information and the like in addition to the heating sequence and the recipe information. The safety control information includes, for example, a message that cooking is not started when the opening / closing door 10 (see FIG. 1) is open or when there is no food in the cooking chamber, or that the cooking is stopped when the temperature of the cooking chamber becomes higher than a predetermined temperature. Is stored, and the driving unit 42 is controlled in comparison with the detection result of the sensor 33.

The recycling information stores the name, model number, material, date of manufacture, serial number, manufacturer name, recycling method, recycling manufacturer name, recycling manufacturer contact information, and the like of each component. Here, FIG. 4 shows the details of the front surface of the control panel 20. The operation unit 31 is provided with a recycle key 31a.

When the user operates the recycle key 31a when discarding the microwave oven, the recycle information is called from the storage unit 44 and displayed on the display unit 32.
As a result, the user obtains the name of the recycling manufacturer and the contact information of the recycling manufacturer, contacts the recycling manufacturer, and the microwave oven is collected by a specialized company.

In the recycling maker, the recycling key 3
By the operation of 1a, the recycling information of the collected components of the microwave oven is displayed on the display unit 32, and the recycling is performed in an optimal manner according to each component.

According to the above-described method of obtaining the recycling information, it is not necessary to store and manage a document or the like in which different types of recycling information are written for each model of the microwave oven, or to search for the corresponding model in the document. Further, since the recycle information can be confirmed by the storage unit 44 and the display unit 32 provided in the microwave oven, a separate device for reading the recycle information is not required. Therefore, the recycling information can be easily obtained, the recycling can be quickly performed by the optimal route and method, and the workability of the recycling can be improved.

Here, of the recycling information, the name, model number, material, manufacturing date, manufacturing number, manufacturer name, etc. of each component are displayed on the display unit 32 when the user operates the recycling key 31a. If it is displayed, the name of the recycling manufacturer and the contact information of the recycling manufacturer cannot be obtained quickly. Since such recycling information is required by the recycling maker, only the name of the recycling maker and the contact information of the recycling maker may be displayed by operating the recycling key 31a.

Then, as shown in FIG. 5, a display permission switch 26 is provided on the back surface of the control panel 20. Dismantle the microwave oven body 1 and turn on the display permission switch 26
Then, the name, model number, material, date of manufacture,
Recycling information required by the recycling maker, such as a manufacturing number and a manufacturer name, is displayed on the display unit 32. As a result, the user can acquire only necessary recycling information.

A key input section 27 as shown in FIG. 6 may be provided on the back of the control panel 20 in place of the display permission switch 26. Then, when a key operation such as a password is performed in a predetermined order, the recycling information is displayed on the display unit 35. As a result, only a recycling maker who has been instructed in a predetermined key operation order can acquire the recycling information, and it is possible to prevent recycling by a recycling maker without permission. The key operation in a predetermined order is performed by the operation unit 31 on the front of the control panel 20.
May be performed.

When the control panel 20 is removed during recycling, power is not supplied to the display unit 32, the operation unit 31, and the computer unit 23, so that it is impossible to obtain recycling information. Therefore, an external power supply connection terminal 24 may be provided as shown in FIG. 7 so that the control panel 20 can be used independently. Further, in FIG. 8, a battery box 25 is provided, and a battery may be loaded to supply electric power so that the control panel 20 can be used independently.

FIG. 9 shows an external input terminal 2 to which a CD-ROM, a telephone line or the like can be connected on the back of the control panel 20.
8 is shown. If the external input terminal 28 is provided, more detailed recycling information can be obtained from an external host computer via a CD-ROM or a telephone line. Other information devices may be connected to the external input terminal 28.

Next, as described above, the storage unit 44 stores history information. The history information is the operation time of the microwave oven,
It consists of the use time and the number of times of use of each component of the microwave oven. When the drive unit 42 and the sensor 33 are driven,
The timer 36 operates and the use time of the component is stored in the storage unit 44. Each time the switch or the like is turned ON or OFF, the number of times of use is stored in the storage unit 44. For this reason, the storage unit 44 is a rewritable memory. The storage unit 44 may be constituted by a read-only memory, and a rewritable memory that stores only history information may be separately provided.

The storage section 44 stores characteristic information of components constituting the microwave oven. Characteristic information is
For example, in the case of a lamp or a fan motor for blowing air, data of the life time is stored, and in the case of a switch, data of the number of times of use which becomes the life is stored. Further, in the case of a component disposed at a site where the temperature becomes high, a function of the life using the use temperature and the use time as variables is stored.

At the time of recycling, the remaining life of the component is calculated by the arithmetic unit 35 by comparing the history information and the characteristic information of each component by a predetermined operation.
It is displayed on the display unit 32. The recycle maker determines whether to discard or reuse the component based on the displayed remaining life. Therefore, there is no need for the recycle maker to determine the remaining life of each component, and the recycle operation can be performed quickly.

Among the components of the microwave oven, the magnetron 43 may obtain the remaining life from the stored life time as described above, but since the life time varies from several hundred hours to several thousand hours, It is difficult to obtain an accurate remaining life from the use time and the number of uses. Therefore, FIG.
1, the remaining life of the magnetron 43 is determined.

In the figure, 45 is a commercial power supply, 46 is a fuse, 47 is a main switch, 48 is a fan motor for blowing air, 49 is a changeover switch (voltage variable means), and 50 is a filament voltage applied to the filament 43 a of the magnetron 43. Heater transformer (voltage supply means) to supply, 51
Is a high voltage transformer for generating high voltage, 53 is a condenser, 54
Is a diode.

The magnetron 43 is connected to the heater transformer 50 and the secondary winding of the high-voltage transformer. The secondary winding of the heater transformer 50 is connected to the filament 43a of the magnetron 43, and a predetermined filament voltage is applied to the filament 43a. One end of the secondary winding of the high-voltage transformer 51 is connected to a filament 43 a via a capacitor 53.
To one end. The other end of the secondary winding of the high-voltage transformer 51 is connected to the anode (earth) of the magnetron 43.

When the main switch 47 is turned on, the operation unit 3
When cooking is started by the operation of 1, the computer unit 2
The fan motor 48 is controlled by the control unit 41 (see FIG.
And the changeover switch 49 is driven. Switch 49
Is composed of an electromagnet relay switch, and the heater transformer 50
Is arranged on the primary side, and the filament voltage can be changed by switching to the terminals 49a and 49b.

When the switch 49 is connected to the terminal 49a, a predetermined voltage is applied to the primary side of the heater transformer 50 and the high voltage transformer 51. As a result, a predetermined voltage is applied to the filament 43a of the magnetron 43, and the magnetron 43 oscillates a microwave. Thereby, heating of cooking is performed. Further, the characteristic detecting unit 34 measures a current value flowing to the primary side of the heater transformer 50.

The magnetron 43 abnormally oscillates (moding) when a filament voltage lower than a certain voltage value is applied.
Occurs. As shown in FIG. 10, the filament voltage at which the abnormal oscillation starts (that is, the upper limit) is
, The higher the voltage value becomes, the shorter the lifetime of the device becomes. In the figure, the vertical axis indicates the filament voltage at which abnormal oscillation starts, and the horizontal axis indicates the remaining life of the magnetron 43. The relationship shown in the figure is stored in the storage unit 44 as characteristic information.

When the operation mode is switched to the life detection mode by operating the operation unit 31, the changeover switch 49 is connected to the terminal 49b. At the same time, the characteristic detecting section 34 operates. As described above, a predetermined voltage is applied to the primary side of the heater transformer 50 and the high voltage transformer 51. As a result, a predetermined voltage is applied to the filament 43a of the magnetron 43, and the magnetron 43 oscillates a microwave.

At this time, the filament voltage is, for example, as shown in FIG.
Is set to be E1 [V]. When the magnetron 43 oscillates abnormally, the current flowing on the primary side of the heater transformer 50 fluctuates and is detected by the characteristic detecting unit 34. The detection result of the characteristic detection unit 34 is compared with the characteristic information stored in the storage unit 44 and is calculated by the calculation unit 35, and it is determined that the life of the magnetron 43 is shorter than M0 hours. If no abnormal oscillation occurs, it can be determined that the life of the magnetron 43 is M0 hours or more.

The result of the determination is displayed on the display section 32. If the remaining life is M0 hours or more, the magnetron 4
The magnetron 43 is discarded if it is shorter than M0 time. Since the detection of the remaining life of the magnetron 43 is performed without removing the magnetron 43 from the microwave oven main body 1, the magnetron 43 can be recycled with the magnetron 43 attached together with the microwave oven main body 1. Therefore, the recycling operation can be performed efficiently.

The magnetron drive circuit may be configured as shown in FIGS. 12 to 14 described below. FIG.
2 to 14, the same parts as those in FIG. 11 are denoted by the same reference numerals. First, in FIG. 12, a heater winding 50 'is provided on the secondary side of the high-voltage transformer 51 instead of the heater transformer 50 (see FIG. 11). Therefore,
The primary winding of the high-voltage transformer 51 and the heater winding 50 'constitute a voltage supply means for supplying a filament voltage to the filament 43a.

Then, the current on the primary side of the voltage supply means is detected by the characteristic detection section 34, and the same changeover switch 49 as in FIG. 11 is provided at the output terminal of the heater winding 50 'on the secondary side of the voltage supply means. Have been. Other configurations are shown in FIG.
Is the same as With such a circuit configuration, the filament voltage can be easily varied, and the characteristic detection unit 34 can detect whether or not the magnetron 43 abnormally oscillates at a predetermined filament voltage.

Next, in FIG. 13, as in FIG.
In place of the heater transformer 50 (see FIG. 11), a heater winding 50 'is provided on the secondary side of the high-voltage transformer 51. Therefore, the primary winding of the high voltage transformer 51 and the heater winding 50 'constitute a voltage supply means for supplying a filament voltage to the filament 43a.

On the output side of the heater winding 50 ', a plurality of resistors 56 and 57 are provided. Each resistor 57 is arranged in parallel and can be energized by a plurality of changeover switches 58 corresponding to each. The changeover switch 58 is formed by an electromagnet relay switch, and can change the impedance on the secondary side of the voltage supply means to a plurality of values under the control of the computer unit 23. Other configurations are the same as those in FIG.

In the same manner as described above, the characteristic detecting section 34 measures the current value on the primary side of the voltage supply means. With such a circuit configuration, the filament voltage can be easily varied, and the characteristic detection unit 3 determines whether or not the magnetron 43 abnormally oscillates at a predetermined filament voltage.
4 can be detected. Moreover, the filament voltage can be varied to a number of voltage values by the switching method of the switch 58. This allows the calculation unit 35 to determine whether or not there is a remaining life corresponding to each voltage value, so that the remaining life of the magnetron 43 can be acquired more accurately.

Next, referring to FIG.
Changeover switches 61 and 62 are provided on the primary side of the “0”. The changeover switches 61 and 62 are formed of electromagnet relay switches, and can be switched in conjunction with each other under the control of the computer unit 23 (not shown). When the changeover switches 61 and 62 are connected to the terminals 61 a and 62 a, the voltage from the internal power supply from the commercial power supply 45 is applied to the heater transformer 5.
0 is applied to the primary side.

The changeover switches 61 and 62 are connected to the terminals 61b and 6
2b, a voltage from an external power supply 67 connected via the connection terminal 63 is applied to the primary side of the heater transformer 50. The voltage applied by the external power supply 67 can be varied by the slide switch 64. Anode side of magnetron 43 (filament 43a)
Is connected to a synchroscope 66 (characteristic detection unit).
The voltage displacement on the anode side is monitored.

Therefore, when the external power supply 67 is connected to the connection terminal 63 and the changeover switches 61 and 62 are switched to the terminals 61b and 62b, the filament voltage of the magnetron 43 can be changed by operating the slide rack 64. Incidentally, 65
Is a voltmeter for measuring the voltage on the secondary side of the heater transformer 50.

Even in such a circuit configuration, the filament voltage can be easily varied, and whether or not the magnetron 43 abnormally oscillates at a predetermined filament voltage can be detected by the synchroscope 66 (characteristic detecting unit). . In addition, by using the external power supply 67, if the recycle maker owns one external power supply 64, the life of a plurality of types of magnetrons can be acquired. As a result, a circuit for varying the voltage (Slidac 6 in the above example)
Even if 3) has a complicated circuit configuration, it is possible to more precisely grasp the remaining life of the magnetron 43 by applying a finer voltage without increasing the cost of the microwave oven.

Next, as the life of the magnetron 43 approaches, the heating efficiency decreases. As described above, since the life of the magnetron 43 and the filament voltage at which abnormal oscillation starts are in a constant relationship, the relationship between the filament voltage at which abnormal oscillation starts and the heating efficiency is a constant relationship as shown in FIG. . In the figure, the vertical axis indicates the filament voltage at which the occurrence of abnormal oscillation starts, and the horizontal axis indicates the heating efficiency of the magnetron 43.

Therefore, the relationship shown in FIG. 11 is stored in the storage section 44 (see FIG. 3) as characteristic information, and the relationship shown in FIGS.
4, the heating efficiency of the magnetron 43 can be accurately grasped by detecting a filament voltage at which the magnetron 43 starts abnormal oscillation.

In the circuit configuration shown in FIGS. 11 to 14, when the operation section 31 is operated or the main switch is turned on, the filament voltage at which the filament voltage is varied and abnormal oscillation starts is detected by the characteristic detection section 34. Is detected. Then, a calculation is performed by the calculation unit 35, and as shown in FIG. 16, the heating efficiency (unit%) of the magnetron 43 is displayed on the display unit 32.

At the time of cooking, from the heating time set by the user, for example, the heating time is calculated by the calculation unit 35 by the following equation, and the heating time is automatically varied.

Heating time = heating time to be set / (heating efficiency / 100)

As a result, even if the magnetron 43 is deteriorated, it is possible to perform optimal cooking. The user may determine and set the optimal heating time from the heating efficiency displayed on the display unit 32.

If the heating efficiency of the magnetron 43 can be ascertained, the heating output of the magnetron 43 can be easily obtained. Therefore, the heating output may be displayed on the display unit 32 as shown in FIG. Also, as shown in FIG.
A notifying means such as an indicator 70 for notifying a warning when the heating efficiency falls below 70% or 50% may be provided.

Next, recycling of the door 10 (see FIG. 1) will be described. FIGS. 18 and 19 show a perspective view and a sectional perspective view, respectively, in a state where the door 10 is removed. A rectangular recess 11 is formed in a frame 11 formed by sheet metal processing.
b is formed. The glass plate 13 is inserted into the concave portion 11b. The recess 11b is formed with a groove 11d which is further recessed along the outer peripheral edge of the glass plate 13. The gap between the glass plate 13 and the wall surface 11c of the concave portion 11b is filled with a filler material 12 such as silicon rubber.
Are fixed to the frame 11.

When the glass plate 13 and the frame 11 are recycled by disassembling the opening and closing door 10 as described above, the dashed line 1
As shown by 4, the tip of a cutting tool such as a blade is inserted into the groove 11d, and the cutting tool is advanced by the guide of the groove 11d to cut the filler 12. Then, the glass plate 13 is attached to the frame 1
1 to separate the glass plate 13 and the frame 11 from each other. By the groove 11d, the cutting tool can be easily advanced along the glass plate 13, and the number of steps required for separating the glass plate 13 and the frame 11 can be reduced.

Here, the groove 11d is formed at a position wider than the outer dimensions of the glass plate 13 in order to allow variations in the positioning accuracy of the glass plate 13. as a result,
As shown in the cross-sectional view of FIG. 20, the flat portion 11b 'of the concave portion and the glass plate 13 are still fixed via the cut filler 12, and the glass plate 13 and the frame 11 may not be easily separated. .

For this reason, as shown in FIG. 21, a groove 11e having a wide width up to a position overlapping with the glass plate 13 is formed.
It is more desirable to form it in part of d. That is, a detaching tool such as a flathead screwdriver indicated by a dashed line 15 is inserted into the cut formed by the cutting tool. Then, the detaching tool is tilted so that the tip of the detaching tool enters the back side of the glass plate 13, and the glass plate 13 is separated from the frame 11 by the leverage principle. Thus, the glass plate 13 and the frame 11 can be easily separated.

At this time, as shown in FIG. 22, a mark 1 such as an arrow is placed on the frame 11 at a position corresponding to the wide groove 11e.
By providing 6, the workability can be improved because the operator can easily determine the position of the wide groove portion 11e. Further, as shown in FIG. 23, the same effect can be obtained even when the width of the groove 11 d around the entire periphery of the glass plate 13 is increased so as to overlap with the glass plate 13.

[0086]

According to the present invention, it is not necessary to store and manage a document or the like in which different types of recycling information are written for each type of microwave oven, and to search for the corresponding model in the document. Also,
Since the recycling information can be confirmed by the storage unit and the display unit provided in the microwave oven, a separate device for reading the recycling information is not required. Therefore, the recycling information can be easily obtained, the recycling can be quickly performed by the optimal route and method, and the workability of the recycling can be improved. This can prevent an increase in recycling cost.

According to the present invention, the remaining life of each component is calculated by the calculation unit by comparing the history information such as the use time and the number of times of use of each component with the characteristic information. This allows the recycle maker to
Decide whether to discard or reuse the component. Therefore, there is no need for the recycle maker to determine the remaining life of each component, and the recycle operation can be performed quickly.

Further, according to the present invention, the remaining life of each component is calculated by the calculation unit by comparing the detection result of each component such as the magnetron by the characteristic detecting means with the characteristic information. As a result, more accurate remaining life can be grasped, and even if it is judged that recycling is possible, it will not be possible to use it in a short time after recycling, and maintenance costs such as replacement will be costly. The problem of wasting resources can be solved.

Further, according to the present invention, by changing over a switch provided on the primary side or the secondary side of the voltage supply means or by switching a plurality of resistors provided on the secondary side of the voltage supply means, The filament voltage at which the magnetron starts abnormal oscillation can be easily detected from the fluctuation of the current flowing through the side. As a result, the remaining life or heating efficiency of the magnetron can be accurately grasped.

Further, according to the present invention, the remaining life or the heating efficiency of the magnetron is displayed on the display unit, so that the display of the remaining life allows the user or the recycle maker to carry out recycling easily and quickly. Further, even if the magnetron is deteriorated by adjusting the heating time by the user or the control unit according to the displayed heating efficiency, the optimum cooking can be performed. Further, by providing the notification means, the user can easily recognize the magnetron replacement time.

[Brief description of the drawings]

FIG. 1 is an external view of a microwave oven according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a back surface of a control panel of the microwave oven according to the embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a microwave oven according to the embodiment of the present invention.

FIG. 4 is a diagram showing a surface of a control panel of the microwave oven according to the embodiment of the present invention.

FIG. 5 is a diagram in which a display changeover switch is provided on the back surface of the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 6 is a diagram in which a key input unit is provided on the back surface of the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 7 is a diagram in which an external power supply connection terminal is provided on the back surface of the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 8 is a diagram in which a battery box is provided on the back surface of the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 9 is a diagram in which an external input terminal is provided on the back surface of the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 10 is a diagram illustrating remaining life characteristic information stored in the storage unit of the microwave oven according to the embodiment of the present invention.

FIG. 11 is a circuit diagram showing a driving circuit of the magnetron of the microwave oven according to the embodiment of the present invention.

FIG. 12 is another circuit diagram showing a driving circuit of the magnetron of the microwave oven according to the embodiment of the present invention.

FIG. 13 is still another circuit diagram showing a driving circuit of the magnetron of the microwave oven according to the embodiment of the present invention.

FIG. 14 is still another circuit diagram showing a driving circuit of the magnetron of the microwave oven according to the embodiment of the present invention.

FIG. 15 is a diagram showing heating efficiency characteristic information stored in a storage unit of the microwave oven according to the embodiment of the present invention.

FIG. 16 is a diagram illustrating a state in which heating information is displayed on a display unit of a control panel of the microwave oven according to the embodiment of the present invention.

FIG. 17 is a diagram in which an indicator is provided on the control panel of the microwave oven according to the embodiment of the present invention.

FIG. 18 is a perspective view of a door of the microwave oven according to the embodiment of the present invention.

FIG. 19 is a cross-sectional perspective view of a main part of the opening / closing door of the microwave oven according to the embodiment of the present invention.

FIG. 20 is a sectional view of a main part of the opening / closing door of the microwave oven according to the embodiment of the present invention.

FIG. 21 is a sectional perspective view of a main part of another opening / closing door of the microwave oven according to the embodiment of the present invention.

FIG. 22 is a perspective view of another opening / closing door of the microwave oven according to the embodiment of the present invention.

FIG. 23 is a cross-sectional perspective view of a main part of still another opening / closing door of the microwave oven according to the embodiment of the present invention.

FIG. 24 is a sectional view of a conventional microwave oven door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microwave oven main body 10 Opening / closing door 11 Frame 11b Depression 11d Groove 12 Filler 13 Glass plate 20 Control panel 23 Computer part 24 Terminal for external power supply connection 25 Battery box 26 Display permission switch 27 Key operation part 28 External input terminal 31 Operation part 31a Recycle key 32 Display unit 33 Sensor 34 Characteristic detection unit 35 Operation unit 36 Timer 37 Power supply unit 42 Drive unit 43 Magnetron 44 Storage unit 45 Commercial power supply 47 Main switch 48 Blower fan motor 49, 58, 61, 62 Switch 50 Heater transformer 50 'Heater winding 51 High voltage transformer 56, 57 Resistance 64 Slidac 66 Synchroscope 67 External power supply

Claims (5)

[Claims] 1. A recycling information storage unit for storing recycling information for reusing a component, a display unit for displaying information stored in the recycling information storage unit, the recycling information storage unit and the display unit A microwave oven comprising: a control unit for controlling the display unit; and a control panel into which the display unit is incorporated. 2. The recycle information storage unit, the display unit, and the control unit, wherein the recycle information storage unit and the control unit are integrated into the control panel, and the control panel is detached from a microwave oven body. The microwave oven according to claim 1, wherein power can be supplied to the microwave oven. 3. A storage unit for storing an operation history of a component and characteristic information capable of deriving a remaining life of the component from the operation history, and a storage unit of the component based on the operation history and the characteristic information. A microwave oven comprising: a calculation unit for calculating a remaining life. 4. A characteristic detecting means for detecting a characteristic of a component, a storage unit for storing characteristic information capable of deriving a remaining life of the component from the characteristic of the component, a detection result of the characteristic detecting means, A microwave oven for calculating a remaining life of the component based on the characteristic information. 5. A magnetron that oscillates microwaves,
Voltage supply means for supplying a filament voltage to the filament of the magnetron, voltage variable means for varying the filament voltage, abnormality detection means for detecting abnormal oscillation of the magnetron, and the magnetron from the filament voltage at which the magnetron oscillates abnormally. A storage unit that stores information from which the remaining life or heating efficiency of the magnetron can be derived, and a calculation unit that calculates the remaining life or heating efficiency of the magnetron based on the detection result of the abnormality detection unit and the information stored in the storage unit. And a microwave oven.