JP5409669B2 - Cooker - Google Patents

Description

  The present invention relates to a low-cost heating cooker that enables temperature detection with a simple configuration.

  In a conventional cooking device, for example, a heating chamber in which food is heated, an infrared sensor that is attached to the outside upper part of the heating chamber and detects the temperature of the food, a turntable on which the food is placed, and two upper and lower stages In order to carry out heating, a legged net with food on the turntable, a magnetron that oscillates high frequency, and an infrared sensor were installed in the heating chamber to detect the temperature of the food in the heating chamber. In the high-frequency cooking device provided with the opening, by rotating the infrared sensor by an infrared rotation motor by a preset angle, the temperature detection area of the infrared sensor is set to the temperature detection area (a) of the turntable. There is one that detects the temperature of the temperature detection region (b) of the legged net (for example, see Patent Document 1).

JP 2002-39539 A (page 2-3, FIG. 1)

  Conventional cooking devices often use a plurality of types of mounting means such as a table that rotates with a drive source called a turntable, and a grill that is often used when grilling fish. In such a heating cooker, the heating output is changed or stopped by detecting the temperature of the object to be heated by an infrared sensor which is a non-contact temperature detecting means provided in the heating chamber. At this time, in order to change the detection visual field so as to correspond to a plurality of types of mounting means, by attaching a drive source such as a rotary motor to the infrared sensor, the infrared sensor itself can be moved, or the opening part that becomes the visual field can be changed. The detection area is moved by moving it, and the temperature of the object to be heated is detected according to the placing means.

However, the driving means provided adjacent to the heating chamber exposed to a high temperature inevitably becomes a high temperature, and there is a problem that the failure probability is increased and the reliability of the heating cooker is lowered.
In addition, since moving the infrared sensor requires a wide movable area, there is a problem that the space for the parts is compressed.
In addition, there is a problem that the temperature detection accuracy is deteriorated due to complicated control and an increase in error factors such as measurement of the driving time of the motor in temperature detection and position control of the infrared sensor.

The present invention has been made to solve the above-described problems, and a first object is to obtain a heating cooker with reduced component failure probability and improved reliability.
Moreover, the 2nd objective is to obtain the heating cooker which reduced the component storage space.
And the 3rd objective is to obtain the heating cooker which improved the temperature detection precision of the non-contact temperature detection means.

The heating cooker according to the present invention can place an object to be heated on the bottom surface, a heating chamber for cooking the object to be heated, and a non-contact temperature detection for detecting the surface temperature of an object in the detection region Means, detachably installed in the heating chamber , the mounting means on which the object to be heated can be placed, and heating means for heating the object to be heated placed in the heating chamber ; The heating means is constituted by a flat heater installed on the top surface of the heating chamber, and has an upper heating means for radiatively heating the object to be heated from above. First mounting means that can be detachably installed in the room, second mounting means that can be detachably installed on both the bottom surface of the heating chamber and the mounting surface of the first mounting means , has, before Symbol contactless temperature sensing means is fixed to the side or back of the upper portion of the heating chamber Is constituted by a single thermopile, the detection region, the central portion of the bottom surface of the heating chamber, the center of the mounting face of the first mounting means in the case of installing the first mounting means to the heating chamber parts and the central portion of the mounting face of the second mounting means for definitive when installing the second mounting means on the first mounting means, but that is part of the.

  According to the present invention, it is possible to detect the temperature of an object to be heated without using a non-contact temperature detection means and a drive source for changing the detection direction, and when all types of placement means are used. The temperature of the object to be heated can be detected with an extremely simple configuration, the number of parts, the space for storing the parts, and the probability of component failure can be reduced, and cooking of various objects to be heated is possible. It becomes.

It is a front sectional view of the heating cooker according to Embodiment 1 of the present invention. It is an external appearance perspective view of the heating cooker which concerns on Embodiment 1 of this invention. It is a schematic diagram of the detection area | region 7a in case the to-be-heated material 9 is not mounted in the heating cooker which concerns on Embodiment 1 of this invention. It is a figure which shows the detection state when the to-be-heated material 9 is mounted in the high frequency permeation | transmission board 8 in the heating cooker which concerns on Embodiment 1 of this invention. It is a figure which shows the detection state when the to-be-heated material 9 is mounted in the square pan 12 in the heating cooker which concerns on Embodiment 1 of this invention. It is a figure which shows the detection state when the to-be-heated material 9 is mounted in the grill 13 in the heating cooker which concerns on Embodiment 1 of this invention. It is an example of the layout figure of the operation panel 15 of the heating cooker which concerns on Embodiment 1 of this invention. It is a flowchart of the heating operation of the heating cooker which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
(Configuration of cooking device)
1 is a front sectional view of a heating cooker according to Embodiment 1 of the present invention, and FIG. 2 is an external perspective view of the heating cooker.
The heating cooker according to the present embodiment includes a main body 6, a heating chamber 1 that is a cooking space formed inside the main body 6, and an openable / closable door 16 installed on the front surface of the main body 6. An operation panel 15 is provided on the front surface of the main body 6 for setting the heating time and the like. Further, inside the main body 6, a high-frequency oscillator 2 that oscillates a high frequency, a waveguide 3 that propagates the high-frequency oscillated by the high-frequency oscillator 2, an antenna 4 that receives the high frequency propagated through the waveguide 3, And the antenna motor 5 which rotates the antenna 4 via the shaft 5a is provided. Further, in the heating chamber 1, a non-contact temperature detection means 7 for detecting the temperature of the object 9 to be cooked, an atmospheric temperature detection means 14 for detecting the temperature in the heating chamber 1, and a bottom portion in the heating chamber 1. The high-frequency transmission plate 8 on which the heated object 9 can be placed, the square plate 12 on which the heated object 9 can be placed, and the square plate 12 are detachably supported. It can be detachably installed on the square plate rail 17 and the square plate 12 installed on the left and right inner surfaces of the heating chamber 1 when viewed from the front, and the object 9 to be heated can be placed on the upper surface thereof. A grilled net 13 is installed. Further, in the heating chamber 1, a bottom portion provided between the upper heater 10, the high-frequency transmission plate 8, and the bottom surface of the heating chamber 1, which is installed on the top surface of the heating chamber 1 to radiately heat the object 9 to be heated from above. A lower heater 11 that is installed in the space 1b and that radiates and heats the object to be heated 9 from below is installed.

  The heating chamber 1 is a cooking space formed inside the main body 6, and an object to be heated 9 placed therein is cooked by heating.

  The high frequency oscillator 2 is a magnetron that is installed inside the main body 6 and oscillates a high frequency (eg, 2.45 GHz in a home microwave oven). The high-frequency oscillator 2 oscillates a high frequency with an output of about 500 [W] to 1000 [W] in a home microwave oven, for example.

  The waveguide 3 is a closed conductor tube that is installed under the heating chamber 1 inside the main body 6 and propagates the high frequency oscillated from the high frequency oscillator 2, and extends to the center of the bottom surface of the heating chamber 1. Has been. In this waveguide 3, a hole 3 a is formed on the upper surface of the portion extending to the center of the bottom surface of the heating chamber 1, and the hole 3 a and the hole formed in the center of the bottom surface of the bottom space 1 b are formed. The inside of the waveguide 3 communicates with the inside of the bottom space 1b through 1a.

  The antenna 4 receives the high frequency propagated from the high frequency oscillator 2 through the waveguide 3 and irradiates the heating chamber 1 with the high frequency. The antenna 4 has a flat plate shape supported from below by a shaft 5 a of an antenna motor 5 to be described later, and is housed in a bottom space 1 b located below the high-frequency transmission plate 8.

  The antenna motor 5 is installed on the lower surface of a portion of the waveguide 3 that extends to the center of the bottom surface of the heating chamber 1, and a shaft 5 a that is a rotating shaft extends upward. The shaft 5a passes through the lower surface of the portion of the waveguide 3 that extends to the center of the bottom surface of the heating chamber 1, passes through the hole 3a and the hole 1a, and is accommodated in the bottom space 1b so that the lower portion of the antenna 4 can be seen. I support it. Further, when the antenna motor 5 is driven to rotate, the antenna 4 is rotated via the shaft 5a, so that a high frequency is uniformly irradiated from the antenna 4 into the heating chamber 1.

  The non-contact temperature detecting means 7 is constituted by, for example, a thermopile type infrared sensor, and is installed in the upper part of the right inner surface in the heating chamber 1 when viewed from the front direction, and is placed in the heating chamber 1. The temperature of the heated object 9 is detected. Further, the detection direction of the non-contact temperature detection means 7 is fixed, and details of the detection direction will be described later.

  The high-frequency transmission plate 8 is a plate made of ceramic or the like that is installed at the bottom of the heating chamber 1 and on which the object to be heated 9 can be placed. Further, the high frequency transmission plate 8 has a property of transmitting the high frequency irradiated from the antenna 4, and the article 9 to be heated can be subjected to dielectric heating by high frequency via the high frequency transmission plate 8.

The upper heater 10 is a flat heater installed on the top surface in the heating chamber 1 and performs radiant heating on the article 9 to be heated from above. In addition, the upper heater 10 is embedded in the top surface of the heating chamber 1, and the top surface is configured not to protrude downward, so that there is an advantage that the top surface can be easily cleaned.
The lower heater 11 is a sheathed heater installed in the bottom space 1b as described above, and performs radiant heating on the article 9 to be heated from below.
As shown in FIG. 1, two lower heaters 11 are installed on the left and right end sides in the bottom space 1b. However, the present invention is not limited to this, and one or more than three are installed. It is good also as what shall be arbitrarily arrange | positioned in the range which can implement heating with respect to the to-be-heated material 9 equally.

The square dish 12 is detachably supported by square dish rails 17 installed on the left and right inner surfaces as viewed from the front of the heating chamber 1, and the object to be heated 9 is placed on the upper surface thereof. The square dish 12 is made of a material such as ceramic that has high heat resistance, a small expansion coefficient, and transmits high frequencies irradiated from the antenna 4. Therefore, the high frequency irradiated from the antenna 4 can permeate | transmit the square dish 12, and reaches the to-be-heated object 9 mounted in the square dish 12, and can implement dielectric heating.
In addition, what is necessary is just to remove the square plate 12 from the heating chamber 1, when mounting the to-be-heated material 9 in the high frequency permeation | transmission board 8, and heating.

The grill 13 is detachably installed on the square dish 12, and the object to be heated 9 is placed on the upper surface thereof. Further, the grill 13 may be made of metal or silicon, but in the present embodiment, it is assumed to be composed of a metal mesh. Furthermore, since the end face of the metal is sufficiently chamfered, it has a shape that does not cause problems such as concentrated heating or sparks if the output power is a high frequency with an appropriate output. Further, since the grill 13 is installed on the square plate 12, the object 9 to be heated is heated more when placed on the grill 13 than when placed on the square plate 12. Since it approaches the top surface of the chamber 1, it can be strongly subjected to radiant heating from the upper heater 10, so that it is suitable for so-called grill cooking. In addition, since the grill 13 is configured in a mesh shape, the high frequency irradiated from the antenna 4 can reach the object 9 to be heated placed on the grill 13 and perform dielectric heating. Furthermore, since the grill 13 has a mesh shape, it has an opening that does not come into contact with the object 9 to be heated, and steam, oil, etc. from the object 9 that is generated during cooking is efficiently discharged from the opening. Therefore, there is an effect of suppressing the so-called sticky finish.
In addition, what is necessary is just to remove the grill 13 from the heating chamber 1 when mounting the to-be-heated object 9 in the high frequency permeation | transmission board 8 or the square plate 12, and heating.
Further, as shown in FIG. 1, the grill 13 is installed on the square plate 12, but is not limited to this. For example, the grill 13 is installed on the high-frequency transmission plate 8. It may be used.

The ambient temperature detection means 14 is composed of, for example, a thermistor, and is fixed to the upper part of the left inner surface in the heating chamber 1 as viewed from the front, and detects the temperature in the heating chamber 1. .
In addition, although the atmospheric temperature detection means 14 is set as the structure fixed to the upper part of the left inner surface in the heating chamber 1, it is not limited to this, The back surface in the heating chamber 1, a top | upper surface, a bottom surface Or it is good also as what is fixed to a right inner surface, and it is not necessary to install in the heating chamber 1 upper direction.

As shown in FIG. 2, the operation panel 15 is installed on the front right side of the main body 6, and the cooking time, the type or amount of the cooked food, and the like can be set by the operation by the user. Details of the setting operation by the operation panel 15 will be described later.
In addition, although the operation panel 15 shall be installed in the front right side of the main body 6, it is not limited to this, It shall be installed in any outer surface of the main body 6 in the range which does not impair a user's operativity. do it.

  The door 16 is installed on the front surface of the main body 6 so as to be freely opened and closed, and closes the front surface of the heating chamber 1. Therefore, when the door 16 is open, the plate 12 or the grill 13 can be installed or removed, and the object 9 to be heated can be placed or taken out. It becomes possible to carry out the heating cooking of the article 9 to be heated placed in 1. As shown in FIG. 2, the door 16 is provided with a viewing window 16 a made of glass or the like, and the user can check the cooking state of the article 9 to be heated in the heating chamber 1. it can.

  Further, the non-contact temperature detecting means 7 and the atmospheric temperature detecting means 14 are the same because, when steam is generated in the heating chamber 1, heat is taken away by moisture as latent heat of evaporation or infrared transmittance is lowered. Even with heating input, the temperature detection value may tend to be smaller than the actual value. In that case, the actual temperature is estimated from the heating time using the temperature gradient with respect to the time in the initial stage (for example, a predetermined time after the start of heating) before the steam is generated, and the estimated value is used. Also good.

  In addition, dielectric heating tends to heat the inside of the article 9 to be heated, while radiant heating tends to easily heat the outside of the article 9 to be heated. Here, for example, when heating is performed only by radiant heating, the temperature gradient between the inside and the outside of the article 9 to be heated increases. However, the heating cooker according to the present embodiment includes the antenna 4 that performs dielectric heating, and the heated object 9 and the upper heater 10 that perform radiant heating. And a thick meat dish that tends to be insufficient from the viewpoint of sterilization.

  As described above, the object to be heated 9 can be placed on any one of the high-frequency transmission plate 8, the square dish 12, or the grill 13; Means ".

  The high frequency oscillator 2, the waveguide 3, the antenna 4 and the antenna motor 5 correspond to the “high frequency oscillation means” of the present invention. Further, the square plate 12 and the grill 13 correspond to the “mounting means” of the present invention. The square plate 12 corresponds to the “first placement means” of the present invention, and the grill 13 corresponds to the “second placement means” of the present invention. Further, the upper heater 10 and the lower heater 11 correspond to the “upper heating means” and the “lower heating means” of the present invention, respectively.

(High-frequency propagation path)
Next, a description will be added regarding the high-frequency propagation path oscillated from the high-frequency oscillator 2.
The high frequency oscillated from the high frequency oscillator 2 propagates through the space in the waveguide 3. Here, the inside of the waveguide 3 and the inside of the heating chamber 1 (bottom space 1b) communicate with each other through the hole 3a and the hole 1a, and the high frequency propagated in the waveguide 3 is the hole 3a and the hole 1a. It is a mechanism for propagating into the heating chamber 1 (bottom space 1b) via 1a. However, simply providing a hole between the waveguide 3 and the heating chamber 1 does not allow high frequency to efficiently flow into the heating chamber 1. Therefore, the conductive shaft 5a configured as described above and the antenna 4 supported on the shaft 5a from below are configured to receive high frequency. As a result, the antenna 4 efficiently irradiates the inside of the heating chamber 1 with a high frequency, and the object to be heated 9 can be uniformly and rapidly dielectrically heated.

(Detection area of the non-contact temperature detection means 7)
Next, a detection region (hereinafter referred to as a detection region 7a) of the non-contact temperature detection means 7 in the heating chamber 1 will be described with reference to FIGS.
FIG. 3 is a schematic diagram of the detection region 7a when the object 9 is not placed in the heating cooker according to Embodiment 1 of the present invention, and FIG. 4 is a high-frequency transmission plate in the heating cooker. 8 is a diagram illustrating a detection state when the object to be heated 9 is placed, and FIG. 5 is a diagram illustrating a detection state when the object to be heated 9 is placed on the square plate 12 in the cooking device. And FIG. 6 is a figure which shows the detection state when the to-be-heated material 9 is mounted in the grill 13 in the same heating cooker. 3 to 6, the alternate long and short dash line indicates the center of the heating chamber 1.

As shown in FIG. 3, the non-contact temperature detection means 7 has a detection region 7 a intersecting line of the central cross section of the heating chamber 1 indicated by the alternate long and short dash line and the central positive cross section of the heating chamber 1 (that is, heating The center of the chamber 1 in plan view) is fixed so as to include all the positions where the high-frequency transmission plate 8, the square dish 12, and the grill 13 cross each other. In this case, the crossing line and the high-frequency transmission plate 8 intersect with each other at the transmission plate central portion 8a, the crossing with the square plate 12 at the square plate central portion 12a, and the crossing with the grilling net 13 at the baking net central portion 13a. Shall be called. That is, the detection area 7a is adjusted to include all of the transmission plate central portion 8a, the square plate central portion 12a, and the grill net central portion 13a. The center line of the detection area 7 a that spreads radially is set as the detection area center line 7 b, and the non-contact temperature detecting means 7 is fixed so that the detection area center line 7 b passes through the square platen center portion 12 a of the plate 12. Shall.
Usually, the transmission plate central portion 8a, the square plate central portion 12a, and the grill net central portion 13a are arranged at the central portion in the plan view of the heating chamber 1, so that they are respectively the high frequency transmission plate 8, the square plate 12 and It coincides with the central part of the grill 13.

Usually, the article to be heated 9 is placed at the center of the heating chamber 1 in plan view (that is, when placed on the high-frequency transmission plate 8, when placed on the transmission plate center 8 a and the square plate 12). In the case of being placed on the square plate central portion 12a and the grill net 13, it is placed on the grill net central portion 13a). Then, the non-contact temperature detecting means 7 is fixed so as to be the detection region 7a as described above, and the heated object 9 is placed on any of the high-frequency transmission plate 8, the square dish 12, and the grill 13. In addition, the temperature of the article 9 to be heated can be detected by the non-contact temperature detecting means 7.
In addition, it is good also as what colors and displays the detection part in the high frequency permeation | transmission board 8, the square plate 12, and the grill 13 so that a user can recognize the detection area 7a, and the coloring which has the same viewing angle. You may make it irradiate a detection area | region by light emission means, such as LED or a lamp | ramp.
Further, as shown in FIG. 1 and the like, the non-contact temperature detecting means 7 is installed in the upper part of the right inner surface in the heating chamber 1 when viewed from the front direction, but is not limited thereto. Alternatively, it may be installed at the upper part of the back surface or the left inner surface of the heating chamber 1 as long as the detection region 7a satisfies the above-described conditions.
Furthermore, in the above description, the object to be heated 9 is placed at the center of the heating chamber 1 in plan view, but the object to be heated 9 is accommodated as much as possible in the detection area 7a of the non-contact temperature detecting means 7. Therefore, it is good also considering the position shifted according to the detection area | region 7a about the mounting position in the high frequency permeation | transmission board 8, the square dish 12, or the grilling net 13, without fixing to a center part.

  For the heated object 9 having various shapes, it is necessary to allow a corresponding error, but in FIG. 4, a state in which about 50% of the detection area 7 a is occupied by the heated object 9. Is shown. In addition, FIG. 5 shows a state in which about 70% of the detection area 7a is occupied by the object 9 to be heated. Further, FIG. 6 shows a state in which about 30% of the detection area 7a is occupied by the object 9 to be heated. At this time, when a standard food is installed at the center of each mounting means, the occupation range of the detection area 7a is associated with the storage means (not shown) installed in the main body 6 for each food. If stored, by selecting a menu from the operation panel 15 as described later, it becomes possible to detect the optimum temperature of the article 9 to be heated and to determine the finish of cooking.

  Further, as will be described later, the display means 23 on the operation panel 15 may alert the user to place food on the center of each placing means. Thereby, the precision of the temperature detection of the non-contact temperature detection means 7 with respect to a foodstuff can be improved.

  In addition, since the temperature detection accuracy is deteriorated if the detection region 7 a of the non-contact temperature detection means 7 is excessively widened, the square plate 12 has a mounting surface at the center in the height direction in the heating chamber 1. It is good to install so that it may become a lower position. Thereby, in any of the mounting units, there is an effect that the temperature of the article 9 to be heated can be detected without excessively expanding the detection region 7a.

  Further, when the object 9 to be heated is placed on the square plate 12 or the grill 13, the distance between the object 9 and the upper heater 10 is shorter than the distance between the object 9 and the lower heater 11. Thus, the square dish 12 or the grill 13 is installed. Thereby, for example, even when the object to be heated 9 needs to be burnt like gratin or the like and has a large bulk, a suitable finish can be obtained.

  As an example of establishing the positional relationship of these mounting means, the internal height of the heating chamber 1 is 140 [mm], the bottom height of the square plate 12 is 50 [mm], and the non-contact temperature detecting means 7 A case where the fixed position height is 90 [mm] and the placement surface height of the grill 13 is 70 [mm] can be given.

(Operation using the operation panel 15)
FIG. 7 is an example of a layout diagram of operation panel 15 of the heating cooker according to the first embodiment of the present invention.
As shown in FIG. 7, the operation panel 15 includes a heating start unit 20 for starting cooking, a canceling unit 21 for stopping the cooking operation, a food / amount selection unit 22 for selecting a menu, a cooking message, and heating. A display means 23 for displaying the elapsed time or the heating set time is provided. Further, the operation panel 15 includes a dielectric heating time setting means 18 for setting the heating time of the dielectric heating by the high frequency irradiated by the antenna 4, and the radiant heating time for setting the heating time of the radiant heating by the upper heater 10 and the lower heater 11. Setting means 19 is provided. Hereinafter, the heating time of the dielectric heating set by the dielectric heating time setting means 18 is called “dielectric heating setting time”, and the heating time of the radiant heating set by the radiant heating time setting means 19 is called “radiation heating setting time”. .

  Since the menu can be selected by the cooked product / amount selecting means 22, it is possible to detect the optimum temperature of the article 9 to be heated and to determine the finish of cooking.

  The dielectric heating time setting means 18 and the radiant heating time setting means 19 correspond to the “time setting operation means” of the present invention, and the cooked / amount selection means 22 corresponds to the “menu selection operation means” of the present invention. To do.

(Heating operation of the cooking device)
FIG. 8 is a flowchart of the heating operation of the heating cooker according to the first embodiment of the present invention. Hereinafter, the heating operation of the heating cooker according to the present embodiment will be described with reference to FIG.

  It is assumed that the user has previously set the dielectric heating time by the dielectric heating time setting means 18 of the operation panel 15 and the radiant heating time by the radiant heating time setting means 19.

(S1)
When the user operates the heating start means 20 of the operation panel 15, heating cooking is started. A control device (not shown) installed in the heating cooker starts measuring the heating time when cooking is started.

(S2)
When cooking is started, first, the control device performs dielectric heating by high frequency that the antenna 4 irradiates on the object 9 to be heated placed in the heating chamber 1.

(S3)
The control device determines whether or not the ambient temperature in the heating chamber 1 detected by the ambient temperature detection means 14 exceeds a preset operation forced stop temperature. As a result of the determination, if the operation forcible stop temperature is exceeded, the process proceeds to step S8. On the other hand, if the forced operation stop temperature is not exceeded, the process proceeds to step S4. Here, the operation forced stop temperature is a temperature serving as a reference for determining that the heat source has a malfunction such as abnormal heating.

(S4)
The control device determines whether or not the temperature of the object 9 to be heated detected by the non-contact temperature detecting means 7 exceeds a preset operation switching temperature. As a result of the determination, if the operation switching temperature is exceeded, the process proceeds to step S7. On the other hand, if the operation switching temperature is not exceeded, the process proceeds to step S5. Here, the operation switching temperature is a reference temperature for stopping dielectric heating and switching to radiation heating.

(S5)
The control device determines whether or not the ambient temperature in the heating chamber 1 detected by the ambient temperature detection means 14 exceeds a preset operation switching temperature. As a result of the determination, if the operation switching temperature is exceeded, the process proceeds to step S7. On the other hand, if the operation switching temperature is not exceeded, the process proceeds to step S6.
The operation switching temperature here may be set separately from the operation switching temperature in step S4.

(S6)
The control device determines whether or not the elapsed time from the start of the dielectric heating exceeds the dielectric heating set time. As a result of the determination, if the dielectric heating set time is exceeded, the process proceeds to step S7. On the other hand, when the dielectric heating set time is not exceeded, the process returns to step S3.

(S7)
The control device stops the dielectric heating and proceeds to step S9.

(S8)
When the ambient temperature detected by the ambient temperature detection means 14 exceeds the forced operation stop temperature, the control device determines that the heat source has a problem such as abnormal heating, and the heating operation is performed for safety. Is stopped and the process proceeds to step S13.

(S9)
The control device starts radiant heating by the upper heater 10 and the lower heater 11 for the object 9 to be heated placed in the heating chamber 1.
In addition, about radiant heating, it is not limited to using both the upper heater 10 and the lower heater 11, It is good also as what uses either by a menu.

(S10)
The control device determines whether or not the temperature of the object to be heated 9 detected by the non-contact temperature detecting means 7 exceeds a preset operation stop temperature. As a result of the determination, if the operation stop temperature is exceeded, the process proceeds to step S13. On the other hand, if the operation stop temperature is not exceeded, the process proceeds to step S11. Here, the operation stop temperature is a reference temperature for stopping the radiation heating.

(S11)
The control device determines whether or not the ambient temperature in the heating chamber 1 detected by the ambient temperature detection means 14 exceeds a preset operation stop temperature. As a result of the determination, if the operation stop temperature is exceeded, the process proceeds to step S13. On the other hand, if the operation stop temperature is not exceeded, the process proceeds to step S12.
Here, the operation stop temperature may be set separately from the operation stop temperature in step S10.

(S12)
The control device determines whether or not the elapsed time since the start of radiant heating has exceeded the radiant heating set time. As a result of the determination, if the radiant heating set time is exceeded, the process proceeds to step S13. On the other hand, if the radiant heating set time has not been exceeded, the process returns to step S10.

(S13)
The control device stops the radiant heating and ends the cooking for the article 9 to be heated. And a control apparatus alert | reports to a user that heating cooking was complete | finished by the display means 23 in the operation panel 15, or a buzzer (not shown).

  As described above, the ambient temperature detected by the ambient temperature detector 14, the temperature of the article 9 to be heated detected by the non-contact temperature detector 7, and the elapsed time since the dielectric heating is performed are plural. Therefore, for example, even when an error occurs in the detection operation by the non-contact temperature detection means 7, the object to be heated 9 can be cooked safely and with good finish.

  As described above, the detection temperature by the non-contact temperature detection means 7 and the detection temperature by the ambient temperature detection means 14 are used for the determination to switch from the dielectric heating to the radiant heating and the determination to stop the radiant heating. And although it determines in order of a heating time, it is not limited to this. That is, the determination order of steps S4 to S6 in FIG. 8 may be out of order. The same applies to step S10 to step S12 in FIG.

  Moreover, the operation | movement flow of the heat cooking shown by FIG. 8 is an illustration, and is not limited to this. That is, for example, after first performing radiant heating, the operation may be switched to dielectric heating, or may be performed simultaneously with dielectric heating and radiant heating, and may be freely set according to the menu of the article 9 to be heated. It may be a thing.

(Effect of Embodiment 1)
As described above, the non-contact temperature detecting means 7 does not include a drive source for changing the detection direction, and the temperature of the object 9 to be heated is all in the case of using a plurality of types of placing means. Fixed so that detection is possible. As a result, the temperature of the object to be heated 9 can be detected with a very simple configuration, the number of parts, the part storage space, and the probability of component failure can be reduced, and various types of cooking of the object to be heated 9 can be performed. .

  Further, since the non-contact temperature detection means 7 is fixed, complicated control such as position control in the detection direction is not required, and temperature detection accuracy can be improved.

  1 heating chamber, 1a hole, 1b bottom space, 2 high frequency oscillator, 3 waveguide, 3a hole, 4 antenna, 5 antenna motor, 5a shaft, 6 body, 7 non-contact temperature detection means, 7a detection area, 7b detection area Center line, 8 High-frequency transmission plate, 8a Transmission plate center, 9 Heated object, 10 Upper heater, 11 Lower heater, 12 Square plate, 12a Square plate central portion, 13 Grilling net, 13a Grilling net central portion, 14 Atmospheric temperature Detection means, 15 operation panel, 16 door, 16a viewing window, 17 square plate rail, 18 dielectric heating time setting means, 19 radiation heating time setting means, 20 heating start means, 21 cancellation means, 22 cooked food / amount selection means, 23 Display means.

Claims (16)

A heated object can be placed on the bottom, and a heating chamber for cooking the heated object;
Non-contact temperature detecting means for detecting the surface temperature of the object in the detection region;
A mounting means that is detachably installed in the heating chamber and on which the object to be heated can be mounted;
Heating means for heating the object to be heated placed in the heating chamber ;
With
The heating means is constituted by a flat heater installed on the top surface of the heating chamber, and has an upper heating means for radiatively heating the object to be heated from above,
The above-mentioned placing means is
First mounting means detachably installed in the heating chamber;
Second mounting means that can be detachably installed on both the bottom surface of the heating chamber and the mounting surface of the first mounting means ;
Before SL contact temperature detecting means,
Consists of a single thermopile secured to the top of the side or back of the heating chamber,
In the detection area,
A central portion of the bottom surface of the heating chamber;
A central portion of the mounting surface of the first mounting means when the first mounting means is installed in the heating chamber; and
Cooking device, characterized in that the central portion of the mounting face of the second mounting means for definitive when installing the second mounting means on said first stacking means, Ru is included. The cooking device according to claim 1, wherein a center line of the detection area of the non-contact temperature detection means passes through a central portion of the first placement means. The cooking device according to claim 1 or 2, wherein the second mounting means has a shape having an opening. The heating means includes
High-frequency oscillation means that oscillates high-frequency waves, irradiates the high-frequency waves uniformly into the heating chamber and dielectrically heats the object to be heated ;
Is installed in the lower portion of the front Symbol heating chamber, the heating cooker according to claim 1, characterized in that it comprises a lower heating means, the for radiant heating the object to be heated from below. When the object to be heated is placed on the first placing means or the second placing means, the distance between the object to be heated and the upper heating means is the upper heating means and the lower heating means. The cooking device according to claim 4, wherein the cooking device is installed so as to be shorter than a distance between the object to be heated and the lower heating means. The said 1st mounting means is installed so that the mounting surface may become a position lower than the center of the height direction in the said heating chamber. Any one of Claims 1-5 characterized by the above-mentioned. The cooking device described. 6. The cooking according to claim 4 or 5 , wherein after the dielectric heating operation by the high-frequency oscillation unit is performed on the object to be heated, the radiation heating operation by the upper heating unit or the lower heating unit is performed. vessel. A time setting operation means for setting a dielectric heating time that is a heating time of the dielectric heating by the high-frequency oscillation means, and a radiant heating time that is a heating time of the radiant heating by the upper heating means or the lower heating means,
The cooking device according to claim 7 , wherein a dielectric heating operation is started and then the radiant heating operation is switched after the dielectric heating time has elapsed, and the heating operation is stopped after the radiant heating time has elapsed. During implementation of the dielectric heating operation, wherein when the detected temperature by the non-contact temperature detecting means is determined to exceed the predetermined temperature, the heating cooker according to claim 7 or 8, characterized in that switching to radiant heating operation . During implementation of the radiant heating operation, wherein when the detected temperature by the non-contact temperature detecting means is determined to be greater than a predetermined temperature, any one of claims 7-9, characterized in that stopping the heating operation The heating cooker described in 1. An ambient temperature detecting means for detecting the temperature in the heating chamber;
The temperature detected by said ambient temperature detecting means, as a reference for switching the radiation heating operation from dielectric heating operation, and, of claims 7 to 10, characterized in that used as a reference for stopping the heating operation by the radiant heating The heating cooker of any one of Claims. 12. The cooking according to claim 11 , wherein the actual temperature in the heating chamber at the time of detection is estimated based on a temperature gradient of the temperature detected by the ambient temperature detection means within a predetermined time after the start of the heating operation. vessel. The surface temperature of the object in the actual detection region at the time of detection is estimated based on a temperature gradient of the detection temperature by the non-contact temperature detection means within a predetermined time after the start of the heating operation. The cooking device according to any one of 1 to 12 . Storage means for storing occupation range information of the detection area according to the type of the object to be heated;
Menu selection operation means for selecting and setting a menu according to the type of the object to be heated;
With
Reading the occupancy range information corresponding to the menu selected by the menu selection operation means from said storage means, any of claims 1 to 13, characterized in that the use of the temperature detection by the non-contact temperature detecting means 1 The heating cooker according to item. The heating cooker according to any one of claims 1 to 14 , wherein a portion included in the detection area of the non-contact temperature detection means is colored in the placement means. Provided with a display means for displaying the elapsed heating time, etc.
The display means displays an indication that the heated part is urged to be placed at the central part of the bottom surface of the heating chamber or the central part of the placing surface of the placing means. The cooking device according to any one of claims 1 to 15 .