JP4494436B2 - Heating device - Google Patents

Description

  The present invention relates to a heating apparatus provided with imaging means for imaging a heating chamber and outputting the image signal.

  2. Description of the Related Art Conventionally, with respect to a cooking device, the object is to provide a food inspection device for a cooking device that can discriminate the type of food without depending on human eyes. As a technology for the purpose of the above, “a food table 24 on which the food 4 is placed, an insertion means 26 for the food table 24, an imaging means 7 provided on the top of the food table 24, and an infrared temperature sensor 10, A configuration in which the movement of the food table 24 by the insertion means 26 and the detection of the imaging means 7 and the infrared temperature sensor 10 are linked to detect two-dimensional information of the shape, color and temperature of the food 4. Is proposed (Patent Document 1).

  In addition, “a plurality of foods having different finishing temperatures can be set for each food, and the finished state can be confirmed. As a technology for the purpose, “the imaging means 16, the temperature detection means 17 and the display means 18 are provided, and the image information 21 and the temperature information 22 are superimposed on the display means 18 and displayed. Is proposed (Patent Document 2).

Japanese Patent Application Laid-Open No. 5-296259 (summary) JP 2002-243166 A (summary)

In the conventional heating apparatus, the heating state of the food placed in the heating chamber has been visually confirmed by the user through the visual window installed on the door.
The user has a desire to check the finished state of the food, but cannot open the door while driving and can only check through the visual window installed on the door. However, the viewing window is made of punching metal (wire mesh) and glass for preventing electromagnetic leakage, and there is a problem that it is difficult to see clearly.

Therefore, in the techniques described in Patent Document 1 and Patent Document 2, an imaging unit is provided in the heating chamber, and this is used to image the heating chamber to detect the shape of the object to be heated or display a captured image. is doing.
However, installing the image pickup means in the heating chamber that is at a high temperature has a thermal problem that exceeds the operating temperature of the image pickup means, and may cause a failure of the image pickup means.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a heating device that can know the heating state of an object to be heated from the outside while avoiding a failure of an imaging unit. To do.

A heating device according to the present invention includes a door, a heating chamber that places and heats an object to be heated, and an outside of the door, images the heating chamber through the door, and outputs an image signal thereof. Imaging means for outputting, storage means for storing an image signal captured by the imaging means, load shape determination means for determining the size and shape of the object to be heated based on the image signal, and an image captured by the imaging means Boiling state determination means for determining the boiling state of the object to be heated based on the signal, the boiling state determination means monitors over time the portion of the image signal that the load shape determination means has determined as the object to be heated; When the color of the image of the portion does not change and the surface shape changes, it is determined that the object to be heated is boiling .

According to the heating device of the present invention, since the imaging means is disposed outside the heating chamber, the possibility that the imaging means will fail due to a temperature rise in the heating chamber can be reduced, and the object to be heated from outside without worrying about such failure The heating state of can be confirmed. In addition, a storage unit, a load shape determination unit, and a boiling state determination unit are provided, and the boiling state determination unit monitors over time a portion of the image signal that the load shape determination unit has determined to be an object to be heated. When the color does not change and the surface shape changes, it is determined that the object to be heated is boiling, so that it can be determined that the object to be heated is boiling.

Embodiment 1 FIG.
FIG. 1 is a front view of the heating apparatus according to Embodiment 1 of the present invention.
There is a heating chamber 2 in the main body 1, and the user opens the door 4 and places the article 3 to be heated on the tray 21 installed in the heating chamber 2.
A handle portion 6 for assisting a gripping operation for opening and closing the door 4 is attached to the upper portion of the door 4. Further, an imaging means 10 for imaging the heating chamber 2 is attached to the handle portion 6.
The user sets the heating time, the target heating temperature, the heating method, the input power, and the like using the operation unit 15 serving as setting input means in order to close the door 4 and heat the article 3 to be heated.
The imaging means 10 can be configured using a CCD or CMOS camera. The camera is a small camera used in a mobile phone or the like.
The convention fan 14 is for circulating the air in the heating chamber 2.
Reference numeral 17 a denotes a circulation heating upper ejection hole, and 17 b denotes a circulation heating lower ejection hole, which is provided for circulation of air in the heating chamber 2.
The display means 20 receives the image signal in the heating chamber 2 imaged by the imaging means 10 and displays the content on the screen. After the heating operation is started, the inside of the heating chamber 2 is photographed by the imaging unit 10 and the image signal is received by the display unit 20 and displayed on the screen, so that the user can visually confirm the heating state of the article 3 to be heated.
In addition, the display means 20 can be comprised using a liquid crystal panel or an organic EL display as an example.

In the first embodiment, the imaging means 10 is installed at the center lower portion of the handle portion 6 installed at the upper portion of the door 4. This installation position is an example. For example, the installation position may be installed on the upper portion of the handle portion 6 or on both left and right ends.
Further, the imaging range of the imaging means 10 may be taken locally, not the entire heating chamber 2.

  Here, the heat resistance of the imaging means 10 will be supplemented below.

In the first embodiment, it is assumed that the heat resistant upper limit temperature of the imaging means 10 is about 80 ° C., and it is difficult to install the imaging means 10 in the main body 1 or in the vicinity of the heating chamber 2.
Therefore, as shown in FIG. 1, by installing the imaging unit 10 in the handle portion 6 outside the main body 1, the ambient temperature of the imaging unit 10 is unlikely to increase. Imaging can be performed.
The lens of the imaging means 10 may be a wide angle / fisheye lens depending on the shooting distance when the distance to the object to be heated 3 is short.

FIG. 2 is a side sectional view of the heating apparatus according to the first embodiment.
The door 4 is provided with a viewing window 5 made of punching metal or glass.
At the upper and lower parts of the inner surface of the heating chamber 2, air outlets 13 a and 13 b for air sucked by the convection fan 14 are provided.
The load temperature detection means 16 is a temperature sensor that measures the temperature in the heating chamber 2 in a non-contact manner, and here, as an example, a 4 × 4 compound eye infrared temperature sensor that can detect the temperature at a plurality of locations in the heating chamber 2 is used. It shall be.

The high frequency oscillator 7 oscillates a 2450 MHz microwave (hereinafter, “high frequency”). The oscillated high frequency propagates through the rotary antenna 11 through the waveguide 8, passes through the dielectric plate 12 installed at the bottom of the heating chamber 2, and is an object to be heated placed on the dielectric plate 12. 3 is emitted.
The rotating antenna 11 radiates a high frequency, and is driven to rotate by a motor 9a with the motor shaft 9b as a central axis, so that the radiation angle can be adjusted. The temperature increase rate of the object to be heated 3 can be increased by stopping the rotation of the rotating antenna 11 at a specific angle at which high frequency is radiated intensively to the object to be heated 3.

The signal processing unit 18 performs signal processing on the image signal obtained from the imaging unit 12 and the temperature signal obtained from the load temperature detection unit 16, performs data conversion, and outputs the data to the control unit 24.
The control unit 24 controls the overall operation of the heating device according to the first embodiment. Here, the execution of the function corresponding to the operation input by the operation unit 15 and the drive control of the motor 9a are performed, and the load detection process described later with reference to FIG. 4 is performed based on each detection signal received from the signal processing unit 18. Shall be implemented.

The control unit 24 can be configured by hardware such as a circuit device that realizes the function, or can be configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon.
The “load shape determining means” in the first embodiment corresponds to the control unit 24.

FIG. 3 shows a difference in images taken by the imaging means 10 before and after placing the article 3 to be heated in the heating chamber 2. The reason why it is divided into 4 × 4 will be described in detail later with reference to FIG.
FIG. 3A is an image before the object to be heated 3 is placed in the heating chamber 2. In the image captured by the imaging means 10, only the dielectric 12 laid on the bottom surface in the heating chamber 2 is shown.
FIG. 3B is an image after the object to be heated 3 is placed in the heating chamber 2. In the image picked up by the image pickup means 10, in addition to the dielectric 12, the tray 21 and the object to be heated 3 placed thereon are shown.

  The image signal in FIG. 3A is stored in a storage means such as a flash memory (not shown), and the image pickup means 10 periodically compares it with the image signal currently being picked up to recognize the difference. The outline of the size and shape of the heated object 3 can be determined.

However, as shown in FIG. 3B, when the object to be heated 3 is placed on the tray 21, the tray 21 and the object to be heated 3 are integrally recognized, and the whole is heated. There is a possibility of misunderstanding that it is a thing.
Therefore, it is considered to determine the outline of the size and shape of the object to be heated 3 by superimposing the temperature detection signal from the load temperature detection unit 16 on the captured image signal from the imaging unit 10 and comprehensively determining both. .

  FIG. 4 shows a processing flow for detecting the object to be heated 3 in the heating chamber 2. Hereinafter, each step will be described.

(S401)
When the door 4 is opened or the setting is input to the operation unit 15, the power supply of the heating device is turned on.
(S402)
The control unit 24 activates the imaging unit 10.
(S403)
The control unit 24 instructs the imaging unit 10 to image the inside of the heating chamber 2.
The imaging means 10 images the inside of the heating chamber 2 and outputs the image signal to the signal processing unit 18.
The signal processing unit 18 performs signal processing on the image signal output from the imaging unit 10 and stores the image signal in a storage device such as a flash memory (not shown) as converted image data.
As a result, the image signal of the color or pattern of the dielectric plate 12 in the heating chamber 2 is stored in the storage device.

(S404) to (S405)
The user places a load (the object to be heated 3 and the tray 21) in the heating chamber 2, closes the door 4, and inputs the heating setting through the operation unit 15.
(S406)
The operation of the heating device (heating operation) is started.

(S407)
The control unit 24 instructs the imaging unit 10 to image the inside of the heating chamber 2.
The imaging means 10 images the inside of the heating chamber 2 and outputs the image signal to the signal processing unit 18.
The signal processing unit 18 performs signal processing on the image signal output from the imaging unit 10 and stores the image signal in a storage device such as a flash memory (not shown) as converted image data.
(S408)
The control unit 24 compares the image in the heating chamber 2 stored in the storage device in step S403 with the image in the heating chamber 2 stored in the storage device in step S407, and determines whether or not they are the same. I do.
If both are the same, the process proceeds to step S412, and if there is a difference, the process proceeds to step S409.
It is convenient to determine whether or not they are the same by comparing the differences in the image data. Further, if they are not completely the same, it may be determined that they do not match, or the matching degree may be digitized by a predetermined determination formula or the like, and if a matching degree of a certain level or more is obtained, it may be determined that they are the same.

(S409)
The control unit 24 determines whether or not the temperature rise (Δt) per unit time exceeds a predetermined value in the temperature signal detected by the load temperature detection means 16. This determination is performed for each detection unit block of the load temperature detection means 16. In the example of FIG. 3, the determination is performed for each 4 × 4 block.
If Δt exceeds a predetermined value, the object to be heated 3 exists in the block, and if it is equal to or less than the predetermined value, a low-loss dielectric such as the tray 21 that hardly absorbs high frequency exists in the block. , And can be determined.

In this way, by performing the determination for each detection unit block of the load temperature detection means 16, it is possible to determine in which block the heated object 3 or the tray 21 exists.
Furthermore, the heated object 3 and the tray 21 can be identified by superimposing the image signal captured by the imaging unit 10 and the temperature signal detected by the load temperature detection unit 16.
That is, if the images in steps S403 and S407 do not match, it is determined that the tray 21 or the object to be heated 3 exists in the mismatched portion. Furthermore, it is determined in which block the object to be heated 3 exists based on the temperature detected by the load temperature detecting means 16.

(S410)
When Δt exceeds a predetermined value, it is determined that the object to be heated 3 exists in the block.
(S411)
When Δt is equal to or smaller than a predetermined value, it is determined that the tray 21 exists in the block.
(S412)
It is determined that nothing is placed in the heating chamber 2.

As described above, according to the processing flow of FIG. 4, the imaging means 10 disposed in the handle portion 6 images the inside of the heating chamber 2, and the object 3 to be heated or the like is placed in the heating chamber 2 due to the change in the image signal. It can be detected that the tray 21 is placed.
Further, in the region where it is detected that the object to be heated 3 or the tray 21 is placed, the temperature signal detected by the load temperature detecting means 16 is superimposed, and the temperature rise per unit time is measured, whereby the object to be heated is heated. The object 3 and the tray 21 can be identified.
In this way, by using the image signal output from the image pickup means 10 and the temperature signal detected by the load temperature detection means 16 together, the object to be heated 3 and the tray 21 can be identified, which was difficult with only the image signal. The outline of the size and shape of the object to be heated 3 and the tray 21 can be known.

If a rough size or shape of the object to be heated 3 is detected, the control unit 24 controls the motor 9a to rotationally drive the rotating antenna 11 so that a high frequency is radiated intensively to the object to be heated 3. in that for rotation is stopped, by changing the electric field distribution of the high frequency, it is possible to increase the heating rate of the heated object 3.

FIG. 5 shows a screen display example of the display means 20.
The display means 20 can display the image signal of the heating chamber 2 imaged by the imaging means 10 as it is, or display the image signal in combination with the temperature signal obtained by the load temperature detection means 16 in addition to the image signal. Here, a display example according to FIG. 3 will be described.
FIG. 5A shows an example in which a 4 × 4 compound eye infrared temperature sensor is used for the load temperature detection means 16 and the screen is equally divided into 4 × 4 and the detected temperature values are displayed in respective sections.
FIG. 5B is an example in which the heating chamber is equally divided by 4 × 4 and is color-coded for each temperature based on the detected temperature signal for each section and displayed in a contour diagram.
FIG. 5C shows the rough shape of the object to be heated 3 based on the image signal obtained from the imaging means 10 and the temperature signal obtained from the load temperature detecting means 16, and only the portion of the object to be heated 3 is determined. It is an example which displays average temperature.

As shown in the display example of FIG. 5, the display unit 20 matches the detection position of the load temperature detection unit 16 installed in the heating chamber 2 with the image signal obtained from the imaging unit 10, and the display unit 20. By displaying the temperature information of the heating chamber 2 displayed in the above, the user can easily confirm the heating state of the article 3 to be heated.
As a result, it is possible to input the extension of the operation time without having to open and close the door 4 according to the user's preference after the operation is completed, so that it is possible to prevent heat leakage due to the opening and closing of the door 4.

In the above description, the high-frequency heating device has been described as an example, but the heating device that heats the article 3 to be heated by the radiant heat of the heaters installed above and below the heating chamber 2 has the same configuration. The effect can be demonstrated. The same applies to heating devices that perform heating by other methods.
Furthermore, you may apply the structure of the heating apparatus which concerns on this Embodiment 1 to a heating cooker. The same applies to the following embodiments.

  As described above, according to the first embodiment, the imaging means 10 is attached to the handle portion 6 attached to the door 4 outside the heating chamber 2 so that the inside of the heating chamber 2 is imaged from the outside of the heating chamber 2. As a result, even if the temperature of the heating chamber 2 rises, there is no concern that the temperature around the imaging means 10 exceeds the maximum allowable temperature of the imaging means 10, and the possibility of failure of the imaging means 10 can be reduced.

  Further, the imaging means 10 captures an image in the heating chamber 2, and determines the outline of the size and shape of the heated object 3 and the tray 21 placed in the heating chamber 2 based on the change in the image signal. Can do.

Further, the temperature rise per unit time in the heating chamber 2 is measured by the load temperature detecting means 16 and is superposed on the image signal picked up by the image pickup means 10 so that the object to be heated 3 and the tray 21 can be identified. At the same time, an outline of these sizes and shapes can be determined.
Further, by changing the angle drive control to the electric field distribution of the rotating antenna 11 as a high frequency is intensively radiated to the object to be heated 3, and increase the heating rate of the heated object 3.

  Further, the display unit 20 outputs the image signal captured by the imaging unit 10 to the screen, or displays the image signal captured by the imaging unit 10 and the temperature signal detected by the load temperature detection unit 16 on the screen. Thereby, since the user can confirm the heating state of the to-be-heated material 3 from the outside, it contributes to a user's convenience.

Embodiment 2. FIG.
In the heating apparatus according to Embodiment 2 of the present invention, whether or not the article to be heated 3 is in a boiling state is determined based on the image signal captured by the imaging unit 10 and the temperature signal detected by the load temperature detection unit 16. An operation example for determination will be described.

  The configuration of the heating apparatus according to the second embodiment is the same as that of the first embodiment. However, regarding the boiling state detection described later, the “boiling state determination means” in the second embodiment is controlled by the control unit 24. It shall be equivalent to

FIG. 6 illustrates a mechanism in which the heating device according to the second embodiment detects the boiling of the article 3 to be heated.
In the left diagram of FIG. 6, the liquid heated object 3 is placed in the cup 23 and placed in the heating chamber 2, and the imaging unit 10 images the state. Although not shown in FIG. 6, the load temperature detection means 16 detects the temperature of the article 3 to be heated.
The control unit 24 can determine an outline of the size and shape of the cup 23 based on the image signal captured by the imaging unit 10. Furthermore, based on the temperature signal detected by the load temperature detection means 16, the heated object 3 can be identified by measuring the temperature rise per unit time as described in the first embodiment.
After recognizing the article 3 to be heated, the boiling state of the article 3 to be heated is determined according to the criteria described below.

FIG. 6A is an image before the article to be heated 3 boils. As heating progresses, the shape of the article 3 to be heated does not change, but the temperature detected by the load temperature detecting means 16 gradually increases.
FIG.6 (b) has shown that the to-be-heated material 3 will be in a boiling state, and the surface part shape of the to-be-heated material 3 has changed by boiling.
That is, the control unit 24 grasps the size and shape of the object 3 to be heated based on the image signal or further using the temperature signal, and monitors the image of the surface shape of the object 3 to be heated over time. When it is determined that the surface portion of the object 3 is changing in shape without a color change, it can be determined that the heated object 3 is boiling.
By adding the temperature detected by the load temperature detecting means 16 to the determination condition in addition to the above-described boiling determination standard, the boiling determination accuracy is further increased.

When it is determined that the article to be heated 3 is in a boiling state, the control unit 24 immediately stops the operation of the heating device or stops after a predetermined time has elapsed.
Thereby, since the occurrence of a fire accident due to overheating of the article 3 to be heated can be suppressed, there is an effect that the safety of the heating device is increased. In addition, by performing the boiling determination based on both the image signal and the temperature signal, the accuracy of the determination is increased, which contributes to the convenience of the user.
Furthermore, when the boiling is detected, the operation is stopped immediately, so that the spilled food can be prevented.

  In the second embodiment, the “boiling state determination unit” is equivalent to the control unit 24, but the “boiling state determination unit” may be provided separately. In this case, the “boiling state determination unit” can be realized by the same configuration as the control unit 24.

Embodiment 3 FIG.
In the heating apparatus according to Embodiment 3 of the present invention, whether or not the object to be heated 3 is burned is determined based on the image signal captured by the imaging unit 10 and the temperature signal detected by the load temperature detection unit 16. An operation example for determination will be described.
In the third embodiment, description is made assuming a heater heating device, but the same applies to a high-frequency heating device.

  The configuration of the heating apparatus according to the third embodiment is the same as that of the first embodiment. However, the “burning state determination unit” in the third embodiment is related to the burn detection described later by the control unit 24. It shall be equivalent.

In a heating device using a heater, there is a possibility that the object to be heated 3 may be burnt depending on the radiation state of the heat and the shape of the object to be heated 3. If the range of scoring spreads beyond a certain level, there is a possibility that a fire accident or the like will occur, such as the burning of the object 3 to be heated becomes intense.
Therefore, it is considered that the image signal in the heating chamber 2 by the imaging means 10 is monitored over time to detect scorching.

The control unit 24 can determine an outline of the size and shape of the cup 23 based on the image signal captured by the imaging unit 10. Furthermore, based on the temperature signal detected by the load temperature detection means 16, the heated object 3 can be identified by measuring the temperature rise per unit time as described in the first embodiment.
After recognizing the article 3 to be heated, the burned state of the article 3 to be heated is determined according to the determination criteria described below.

The control part 24 discriminate | determines the area | region increase of a black or brown part among the parts determined to be the to-be-heated material 3, and assumes that the black or brown part is burnt. When the ratio of the black or brown portion to the surface of the object to be heated 3 exceeds a predetermined value, it is assumed that the degree of scorching of the object to be heated 3 exceeds the allowable range, and the operation of the heating apparatus is stopped.
The stop may be performed immediately or after a predetermined time has elapsed.

  In addition to the color determination based on the image signal, the detection accuracy of the burn temperature is further increased by adding the detection temperature of the load temperature detection means 16 to the determination condition.

  In consideration of the case where the object to be heated 3 itself has a black or brown portion, the operation is not stopped when the ratio of the black or brown portion exceeds a predetermined value, but the black or brown at the time when heating is started. The ratio of the portion may be set as an initial value, and the operation of the heating device may be stopped when the proportion of the black or brown portion increases by a certain level or more.

  It is considered that black or brown is generally used as a reference color for the determination of scoring, but other colors may be used. Note that it is considered that, for example, if the color identification standard is based on the brightness value of the color components, it is easy to identify the burn.

  As described above, according to the third embodiment, it is possible to prevent the object to be heated 3 from being burnt and lead to the occurrence of a fire accident or the like, so that the safety of the heating device is increased. . In addition, by performing the burn determination based on both the image signal and the temperature signal, the accuracy of the determination is increased, which contributes to the convenience of the user.

  In the third embodiment, the “burning state determination unit” corresponds to the control unit 24. However, the “burning state determination unit” may be provided separately. In this case, the “burning state determination unit” can be realized by a configuration similar to that of the control unit 24.

Embodiment 4 FIG.
FIG. 7 is a side sectional view of a heating apparatus according to Embodiment 4 of the present invention.
In FIG. 7, a communication means 19 is newly provided in comparison with the configuration described in FIG. Other configurations are the same as those in FIG.
The communication unit 19 can send and receive communication packets to and from the network. The communication method and the connection interface are appropriately configured according to the connection destination network. For example, in communication within a home network, it is conceivable to use PLC (power line carrier communication).
Note that the “transmission means” in the fourth embodiment corresponds to the communication means 19.

FIG. 8 shows an example of a transmission destination of a communication packet.
The communication unit 19 transmits a communication packet including an image signal (or image data signal-processed by the signal processing unit 18) captured by the imaging unit 10 to an external device 22 such as a mobile phone or a personal computer having a display device. Send to
Thereby, since the user can confirm the state of the heating chamber 2 even in a remote place, for example, when the temperature in the heating chamber 2 is abnormally increased, or the heated object 3 is in a boiling or scorching state. In this case, it is possible to take a quick response from a remote place, and the safety of the heating device is increased.
In addition, by transmitting the image signal to the external device 22 having a display function at another location and displaying it, the user can leave the kitchen and the convenience is greatly improved.

Note that an image in which the temperature detected by the load temperature detection unit 16 is added to the image signal captured by the imaging unit 10 may be sent to the external device 22. At this time, the same image data as the image displayed on the screen by the display unit 20 may be output to the communication unit 19 so that the screen display content of the external device 22 and the screen display content of the display unit 20 are synchronized.
In addition, considering the performance difference between the display unit 20 provided in the heating device and the display device provided in the external device 22 and the communication speed of the network, the image displayed on the display unit 20 is subjected to compression processing or the like and then applied to the external device 22. You may make it transmit.

Embodiment 5 FIG.
In the fifth embodiment of the present invention, in addition to the configuration and the operation example described in the fourth embodiment, an operation example in which the heating device can be remotely operated via a network will be described.
Note that the “reception unit” in the fifth embodiment corresponds to the communication unit 19.

The user transmits a communication packet including a remote operation command to the heating device using a mobile phone or a personal computer. The operation content includes, for example, heating extension and stop, and change of output.
The communication unit 19 receives a communication packet including a remote operation command and outputs it to the control unit 24.
The control unit 24 analyzes the contents of the communication packet and executes an operation corresponding to the operation command.

Thus, the convenience for the user is improved by enabling the remote operation of the heating device.
In particular, when the image in the heating chamber 2 is confirmed remotely, when the abnormality in the heating chamber 2 is found by the content of the image, the operation of the heating device can be stopped immediately, Increased safety of the heating device.

Embodiment 6 FIG.
In the sixth embodiment of the present invention, the control unit 24 does not receive input from the operation unit 15 and does not open or close the door 4 in a stable state even after a certain time has elapsed after the operation of the heating device is stopped. Turns off the power supply circuit of the heating device and sets the standby power to 0 kWh.
As a result, unnecessary standby power is not consumed, which saves electricity costs for the user and is also preferable from an environmental point of view.

  When starting the heating device again, a separately provided main power switch is turned on. Until the main power is turned on, the standby power is 0 kWh.

Note that the operation of turning off the power supply circuit of the heating device may be performed directly by the control unit 24, or a separate power supply cutoff circuit may be provided so that a cutoff command is issued from the control unit 24 to the power supply cutoff circuit. Good.
The “power cut-off means” in the sixth embodiment corresponds to the control unit 24 or the power cut-off circuit and the control unit 24 described above.

3 is a front view of the heating apparatus according to Embodiment 1. FIG. 2 is a side sectional view of the heating apparatus according to Embodiment 1. FIG. The difference of the picked-up image by the imaging means 10 before and after mounting the to-be-heated material 3 in the heating chamber 2 is shown. The processing flow which detects the to-be-heated material 3 in the heating chamber 2 is shown. The example of a screen display of the display means 20 is shown. The mechanism in which the heating device according to Embodiment 2 detects the boiling of the article 3 to be heated will be described. 6 is a side sectional view of a heating apparatus according to Embodiment 4. FIG. The example of the transmission destination of a communication packet is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Heating chamber, 3 Heated object, 4 Door, 5 Viewing window, 6 Handle part, 7 High frequency oscillator, 8 Waveguide, 9a Motor, 9b Motor shaft, 10 Imaging means, 11 Rotating antenna, 12 Dielectric Plate, 13a outlet, 13b outlet, 14 convention fan, 15 operation section, 16 load temperature detection means, 17a circulation heating upper ejection hole, 17b circulation heating lower ejection hole, 18 signal processing section, 19 communication means, 20 Display means, 21 tray, 22 external device, 23 cups, 24 control unit.

Claims (14)

A heating chamber provided with a door for placing and heating an object to be heated;
An imaging means disposed outside the door, for imaging the heating chamber through the door and outputting the image signal;
Storage means for storing an image signal captured by the imaging means;
Load shape determination means for determining the size and shape of the object to be heated based on the image signal;
Boil state determining means for determining the boiling state of the object to be heated based on the image signal captured by the image capturing unit;
The boiling state determination means includes
Monitor the portion of the image signal that the load shape determination means determines to be heated over time,
If the color of the image in that part has not changed and the surface shape has changed,
It is determined that the object to be heated is boiling . The door
It has a handle part that assists the gripping operation for opening and closing,
The heating apparatus according to claim 1 , wherein the imaging unit is disposed in the handle portion. The load shape determination means includes
Compare the image signal before and after placing the object to be heated in the heating chamber,
A portion corresponding to an image signal different from the image signal in the heating chamber is determined as an object to be heated,
The size and shape of a to-be-heated material are determined based on the determination result. The heating device according to claim 1 or 2 characterized by things. A load temperature detecting means for detecting the temperature in the heating chamber;
The load shape determination means includes
The object to be heated is determined to be placed in the heating chamber when the temperature rise value per unit time of the temperature detected by the load temperature detecting means is a predetermined value or more. The heating device according to any one of claims 1 to 3 . The load shape determination means includes
An image signal picked up by the image pickup means, a temperature detected by the load temperature detection means,
The heating apparatus according to claim 4 , wherein the size and shape of the object to be heated are determined based on the above. High-frequency oscillation means for oscillating a high frequency;
A rotating antenna for varying the electric field distribution of high frequency the high-frequency oscillation means oscillates,
With
The rotating antenna is
Based on the size and shape of the heated object determined by the load shape determining means,
Heating apparatus according to any one of claims 1 to 5, characterized in that changing the electric field distribution of the high frequency to be compatible with its size and shape. The boiling state determination means includes
When it is determined that the object to be heated is boiling,
The heating device according to any one of claims 1 to 6, wherein the operation of the heating device is stopped immediately or after the first predetermined time has elapsed. A scoring state determination unit that determines a scoring state of the object to be heated based on an image signal captured by the image capturing unit,
The burn state determination means
Monitor the portion of the image signal that the load shape determination means determines to be heated over time,
When the ratio of the portion where the image signal has a predetermined color exceeds a predetermined value,
The heating device according to any one of claims 1 to 7 , wherein the operation of the heating device is stopped immediately or after the second predetermined time has elapsed. The heating apparatus according to any one of claims 1 to 8 , further comprising display means for displaying an image signal picked up by the image pickup means on a screen. Display means for displaying an image signal captured by the imaging means on a screen;
The display means includes
The signal representing the temperature detected by the load temperature detecting means is superimposed on the image signal and displayed on the screen. The claim 5 or claim 9 dependent on the claim 4 or claim 9 , Heating device. A transmission means for transmitting a communication packet to the network;
The transmission means includes
The heating apparatus according to any one of claims 1 to 10 , wherein a communication packet including content of an image signal captured by the imaging unit is transmitted to a network. A transmission means for transmitting a communication packet to the network;
The transmission means includes
The heating apparatus according to claim 10 , wherein a communication packet including the content of an image displayed on the screen by the display unit is transmitted to a network. Receiving means for receiving communication packets;
Control means for analyzing the content of the communication packet received by the receiving means;
With
The control means includes
The heating device according to any one of claims 1 to 12 , wherein operation of the heating device is controlled based on an operation command included in the content of the communication packet. A power shut-off means for shutting off the power of the heating device and setting the standby power to 0;
The power shut-off means is
When the image signal picked up by the image pickup means does not change even after the third predetermined time has elapsed since the operation stop of the heating device,
The power supply of the said heating apparatus is interrupted | blocked and standby electric power is set to 0. The heating apparatus in any one of the Claims 1 thru | or 13 characterized by the above-mentioned.

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