JP2001286393A - Rice cooker with fermentation function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker capable of fermenting a dough as required. SOLUTION: A rice cooker having an internal pot 24 housed in a rice cooker body 2, a heating means for heating the internal pot 24 (gas burner 8, electric heater 38), a cooking mode selection means 54 for selecting a cooking mode, and a control means 80 for controlling the heating state of the heating means in a cooking mode selected by the cooking mode selection means 54. A first temperature detection sensor 40 for detecting pot bottom temperature of the internal pot 24, and a second temperature detection sensor 42 for detecting pot rim temperature of the internal pot 24 are provided, and when a fermentation function is chosen by the cooking mode selection means 54, the control means 80 controls the heating state of the heating means on the basis of a detection temperature of the temperature detection sensor 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rice cooker having a fermentation function for fermenting bread yeast.

[0002]

2. Description of the Related Art As a rice cooker with a fermentation function, for example, a rice cooker disclosed in Japanese Patent Application Laid-Open No. 9-164074 is known. This known rice cooker includes an inner case mounted in the apparatus main body, and an inner pot for cooking or fermenting rice is accommodated in the inner case, and an upper opening of the upper end of the apparatus main body is opened and closed. Cover is attached to open and close freely. A combustion burner and a sheath heater for heating are disposed in the apparatus main body, and the combustion burner is disposed below an inner pot accommodated in the inner case. Below and on the upper surface of the inner lid. In this rice cooker, a combustion burner is used when cooking rice, and a seeds heater is used when keeping cooked rice warm and when fermenting yeast in bread.

[0003]

In this known rice cooker, a temperature sensor is disposed below the inner pot contained in the inner case, and this temperature sensor detects the temperature of the bottom wall of the inner pot. The heating of the combustion burner and the sheathed heater is controlled using the detection signal from the temperature sensor. Typically,
The heating power of the combustion burner is strong, while the heating power of the sheathed heater is weak, and the temperature sensor that detects the temperature of the bottom wall of the inner pot is arranged close to the combustion burner, and is easily affected by the heat from the combustion burner. Also, it is difficult to accurately obtain temperature information in the inner pot. When fermenting baker's yeast, the fermentation temperature is about 3
It is about 5 ° C., and it is difficult to accurately control such a fermentation temperature with a temperature sensor disposed below the bottom wall of the inner pot, and baker's yeast cannot be fermented as required.

[0004] It is an object of the present invention to provide a rice cooker with a fermentation function capable of accurately controlling the fermentation temperature of yeast.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a rice cooker main body, an inner pot accommodated in the rice cooker main body, a heating means for heating the inner pot, a rice cooking mode for cooking rice, and a yeast. A cooking mode selection unit for selecting a fermentation mode for fermentation and a baking mode for baking bread; and a control unit for controlling a heating state of the heating unit in the cooking mode selected by the cooking mode selection unit. A rice cooker with a fermentation function, comprising: a first temperature detection sensor for detecting a bottom temperature of the inner pot; and a second temperature detection sensor for detecting a temperature of a pot edge of the inner pot. And when the fermentation mode is selected by the cooking mode selection means, the control means controls a heating state of the heating means based on a temperature detected by the second temperature detection sensor. To.

According to the present invention, first and second temperature detection sensors are provided in connection with the inner pot, and the first temperature detection sensor detects the temperature of the bottom of the inner pot and a second temperature detection sensor. Detects the temperature at the pot edge of the inner pot. In the fermentation mode in which the yeast is fermented, the temperature detected by the second temperature detection sensor is used, and the control means controls heating of the heating means based on the temperature detected by the second temperature detection sensor. The inner edge of the inner pot is less affected by the direct heat from the heating means. Therefore, the temperature information of the entire inner pot is accurately transmitted, and by detecting the temperature of the inner pot, the inner temperature of the inner pot is detected. It is possible to accurately obtain temperature information of the entire inside of the pot. In the case of the fermentation mode, the temperature in the inner pot can be maintained at a temperature suitable for fermentation, for example, about 35 degrees by controlling the heating means based on the temperature detected by the second temperature detection sensor. The fermentation state of the fungus can be maintained as required.

In the present invention, the control means controls the heating state of the heating means based on the temperature detected by the first temperature detection sensor when the cooking mode selection means selects the baking mode. It is characterized by the following.
According to the present invention, in the baking mode for baking bread, the control means controls heating of the heating means based on the temperature detected by the first temperature detection sensor. The bottom wall of the inner pot is in contact with the contents in the inner pot, so that the temperature information of the contents is accurately transmitted, and by detecting the temperature of the bottom of the pot, the temperature change of the contents can be accurately detected. Can be managed. In the case of the baking mode, the content is heated to a temperature suitable for baking, for example, 170 to 180 ° C. by heating and controlling the heating means based on the detection temperature of the first temperature detection sensor, and baking of the bread as required. Can be done.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a rice cooker with a fermentation function according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an embodiment of a rice cooker according to the present invention in a partially cutaway view, and FIG. 2 is a simplified view schematically showing an inner pot and a configuration related thereto. 3
4 is a perspective view showing a support plate and a second temperature detection sensor mounted on the support plate, FIG. 4 is a front view showing an operation panel of the rice cooker of FIG. 1, and FIG. 5 is a rice cooker of FIG. FIG. 2 is a block diagram schematically showing a control system of FIG.

Referring to FIGS. 1 and 2, the illustrated rice cooker includes a rice cooker main body 2, which includes a lower main body 4 mounted on, for example, a table (not shown) or the like, And an upper body 6 attached to the lower body 4.
The upper body 6 is detachably attached to the upper end of the lower body 4. An annular gas burner 8 for burning fuel gas and an ignition device 10 for igniting the gas burner 8 are provided in the lower main body 22.
And a fuel gas supply system 12 for supplying a fuel gas to the gas burner 8. The fuel gas supply system 12 has a gas supply passage formed by a gas supply pipe 14, and this gas supply passage is connected to the gas burner 8. The gas supply passage includes an electromagnetic on-off valve 94 (FIG. 5).
), A governor 96 (see FIG. 5) and a proportional valve 16 are provided, and an electromagnetic on-off valve 94 opens and closes a gas supply flow path,
The governor 96 maintains the pressure of the fuel gas flowing through the gas supply passage at a predetermined pressure, and the proportional valve 16 controls the supply amount of the fuel gas flowing through the gas supply passage. The upper surface of the lower body 4 is covered by a plate 18, the fuel gas supply system 12 is arranged below the plate 18, and a part of the gas burner 8 is located above the opening of the plate 18.

A housing space 22 is formed in the upper main body 6 by a cylindrical member 20, and an inner pot 24 for cooking rice, fermenting bread dough, and baking bread is housed in the housing space 22. At the upper end of the accommodation space 22 of the upper main body 6, there is provided an annular support portion 26 projecting inward in the radial direction, and the annular support member 26 is fixed to the upper end of the cylindrical member 20. An annular flange 28 protruding outward in the radial direction is provided at the upper end of the inner hook 24.
Is placed on the annular support member 26, so that the inner hook 24
Is accommodated in the accommodation space 22.

An outer cover 30 is mounted on the upper end of the upper body 6 so as to be openable and closable about a support shaft 32 so as to cover the upper surface thereof. A mounting member 34 is mounted on the inner surface of the outer lid 30, and an inner lid 36 is detachably mounted on the mounting member 34. When the outer lid 30 is locked in the closed state shown in FIG. 1, the outer lid 30 covers the upper surface of the accommodation space 22 of the upper main body 6, and the inner lid 36 attached to the outer lid 30 Cover the top opening. When the outer lid 30 is turned clockwise in FIG. 1 around the support shaft 32 to open, the upper opening of the inner hook 24 and the upper part thereof are opened.

In this rice cooker, an electric heater 38 is further provided outside the cylindrical member 20 at intervals in the vertical direction, and the electric heater 38 connects the inner pot 24 via the cylindrical member 20. Heat. Such an electric heater 3
8 can also be provided inside the outer lid 30 if necessary. In this embodiment, the gas burner 8 and the electric heater 38 constitute heating means for heating the inner pot 24,
The gas burner 8 is used to heat the inner pot 24 with a strong heating power, and the electric heater 38 is used to heat the inner pot 24 with a weak heating power. In the rice cooker, as will be described later, the rice cooker is heated using the gas burner 8 when heating, baking, and steaming,
Heating is performed using the electric heater 38 during the heating and fermentation heating.

This rice cooker is provided with a first temperature detection sensor 40 for detecting the temperature of the bottom of the inner pot 24 and a second temperature detection sensor 42 for detecting the temperature of the pot edge of the inner pot 24. Have been. In this embodiment, a support member 44 is provided at the center of the gas burner 8, and the first temperature sensor 40 is supported by the support member 44 in a vertically movable manner over a predetermined range. (Not shown) are elastically biased upward. Inner pot 24
When the annular flange 28 is placed on the annular support member 26, the first temperature detection sensor 40 is pressed against the outer surface of the substantially central portion of the bottom wall of the inner pot 24 by the action of the spring member. Detect temperature. Also, as shown in FIG.
A concave portion is provided in a part 46 of the annular support member 28, and the second temperature detection sensor 42 is disposed in the concave portion. When the annular flange 28 of the inner hook 24 is placed on the annular support member 26, the second temperature detection sensor 42 contacts the lower surface of the annular flange 28, and the inner edge of the inner hook 24, that is, the inner hook 2
The temperature of the annular flange 28 or the vicinity thereof is detected.
The second temperature detecting sensor 42 may be disposed on the inner surface of the upper end of the cylindrical member 20 and may be brought into contact with or pressed against the outer surface of the upper end of the inner pot 24 to detect the pot edge temperature.

An operation panel 50 is provided on the front side of the upper surface of the upper body 6. Referring to FIG. 4, an operation panel 50 shown includes a power switch 52, a cooking mode selection unit 54, a temperature setting unit 56, a timer time setting unit 58, and a display unit 60. The power switch 52
It is a switch for turning on and off the power of the rice cooker,
Pressing it turns on, pressing again turns it off. In this embodiment, the cooking mode selection means 54 includes four switches, that is, a rice cooking switch 62, a steaming switch 64,
It is composed of a fermentation switch 66 and a firing switch 70,
When the rice cooker switch 62 (or steamer switch 64, fermentation switch 66, baking switch 68) is pressed, a rice cooker mode (or steaming mode, fermentation mode, baking mode) is set, and the rice cooking mode (steaming mode, fermentation mode, baking mode) is set. ) According to rice cooking (or steam cooking, fermentation cooking,
Firing).

The temperature setting switch 56 is an up switch 7
The set temperature is increased by 1 ° C. each time the up switch 70 is pressed, and decreased by 1 ° C. each time the down switch 72 is pressed. Also,
The timer time setting switch 58 includes an up switch 74 and a down switch 76.
Each time is pressed, the timer setting time is increased by one minute, and each time the down switch 76 is pressed, the timer setting time is reduced by one minute. The set temperature set by the temperature setting means 56 and the set time set by the timer time setting means 58 are displayed on a display means 60 composed of, for example, a liquid crystal display device. The operation panel 50 is further provided with an alarm lamp 78. The alarm lamp 78 is turned on when an abnormality occurs in the rice cooker to notify the cooker of the abnormality.

The rice cooker is further provided with control means 80 for controlling the operation of the fuel gas supply system 12 and the like.
Referring to FIG. 5, the control means 80 is composed of, for example, a microprocessor, and has a first memory 82, a second memory 84,
A third memory 86 and a fourth memory 88 are included. First
The memory 82 stores rice cooking control program information such as the rice cooking temperature and the rice cooking time in the rice cooking mode.
4 stores a fermentation control program in the dough fermentation mode, a third memory 86 stores a baking control program in the dough baking mode, and a fourth memory 88 stores a steaming control program in the steaming mode. It is remembered. The control means 80 further includes an abnormality detection means 90 and a timer 92. The abnormality detection means 90 detects an abnormality based on the temperature detected by the first temperature detection sensor 40, and generates an abnormality signal when the temperature at the bottom of the inner pot 24 reaches an abnormally high temperature (high cut temperature), for example, 180 ° C. I do. The timer 92 measures a set time.

The detection signals from the first and second temperature detection sensors 40 and 42, the power switch 52, the cooking mode selection means 54, the temperature setting means 56 and the timer time setting means 5
The operation signal from 8 is sent to the control means 80, and the control means 80 controls the fuel gas supply system 12, the ignition device 10, the electric heater 38, the alarm lamp 78, and the like based on the detection signal and the operation signal. Control as follows. Next, the operation of the above-described rice cooker will be described mainly with reference to FIGS. 6 to 10 along with FIGS. 1 and 5. To cook using a rice cooker, first, the power switch 52 is pressed to turn on (close) (step S-1), and then the cooking mode is selected by the cooking mode selection means 54 (step S).
-2). For example, when selecting the rice cooking mode (or the fermentation mode, the baking mode, the steaming mode), the rice cooking switch 62 is selected.
By pressing (or the fermentation switch 66, the firing switch 68, and the steaming switch 64), the rice cooking mode (or the fermentation mode, the firing mode, and the steaming mode) can be selected.

When the rice cooking mode (or fermentation mode, baking mode, steaming mode) is selected, the first
The control program stored in the memory 82 (or the second memory 84, the third memory 86, the fourth memory 88) is read (Step S-3), and the rice cooking (or fermentation) is performed based on the read control program. Cooking, baking, and steaming) are performed (step S-4). When the rice cooking mode is selected, the rice to be cooked is cooked as shown in FIG. 7 according to the rice cooking control program. In this rice cooking mode,
The inner pot 24 is heated by the gas burner 8 and the electric heater 38, and the temperature of the inner pot 24 is detected by first and second temperature detection sensors 40 and 42. More specifically, in cooking in the rice cooking mode, the proportional valve 16 is opened, and the electromagnetic on-off valve 94 is opened in a state where a spark is generated from the ignition device 10. Thus, the fuel gas is supplied to the gas burner 8 through the fuel gas supply system 12, the fuel gas ejected from the gas burner 8 is ignited, and the pre-cooking step is started by heating from the gas burner 8.
In the pre-cooking step, the temperature detected by the second temperature detection sensor 42 is used, and the control means 80 controls the proportional valve 16 based on the detected temperature, whereby the heating state of the gas burner 8 is controlled. When the cooked water in the inner pot 24 boils and the temperature detected by the second temperature detection sensor 42 slightly exceeds 100 ° C., the main cooking process is started, and heating by the gas burner 8 is continued. In the main cooking process, the temperature detected by the first temperature detection sensor 40 is used, and the control means 80 controls the heating state of the gas burner 8 based on the detected temperature.
When the detection temperature of the first temperature detection sensor 40 reaches about 160 ° C. as a result of the main cooking, the proportional valve 16 is closed, the electromagnetic on-off valve 94 is closed, and the gas burner 8 is closed.
, The main cooking process ends, and then the steaming process starts. In the unevenness step, heating is not performed by the gas burner 8 and the electric heater 38, and the unevenness is performed as it is. In this spotting process,
The temperature detected by the second temperature detection sensor 42 is used. When the temperature detected by the second temperature detection sensor 42 drops to about 70 ° C. in the mura processing, the mura processing ends and the heat retention process starts. In the warming step, a current is supplied to the electric heater 38, the inner heater 24 is heated by the electric heater 38, and the control means 80 controls the electric power so that the detection temperature of the second temperature detection sensor 42 is maintained at about 70 ° C. Heater 38
To control the heating state. When the rice cooking mode is selected, rice is cooked as described above, and thereafter, the cooked rice is kept warm.

In the pre-cooking step, the steaming step, and the warming step, the temperature of the pot edge of the inner pot 24 is detected by the second temperature detecting sensor 42. The hook edge of the inner pot 24, that is, the annular flange 28 of the inner pot 24 and the vicinity thereof are positionally separated from the gas burner 8 and the electric heater 38 as heating means, and are hardly affected by these heats. By detecting the temperature, the temperature information of the entire inner pot 24 can be accurately obtained. In particular, this pot edge temperature is suitable for temperature control of 100 ° C. or less for the reasons described above,
The spotting step and the heat retaining step can be performed as required. On the other hand, in the main cooking process, the bottom temperature of the inner pot 24 is detected by the first temperature detection sensor 40. The bottom of the inner pot 24 is close to the contents to be cooked, and the temperature change of the contents can be quickly detected. Therefore, by detecting the bottom temperature of the pot, the finish of the cooking of the contents is completed. It is possible to know the degree accurately, and in particular, this pot edge temperature is suitable for temperature control of 100 ° C. or more for the above-described reason, and the main cooking step can be performed as required.

When the fermentation mode is selected, the baker's yeast is fermented according to the fermentation control program as shown in FIG. When the fermentation mode is selected, the fermentation time is set by the timer time setting means 58, and the fermentation step shown in FIG. 8 is performed during the set fermentation time. In this fermentation step, the inner pot 24 is heated by the electric heater 38, and the temperature of the inner pot 24 is detected by the second temperature detection sensor 42. That is, in cooking in the fermentation mode,
An electric current is supplied to the electric heater 38, and the inner pot 24 is heated by the electric heater 38.
The heating state of the electric heater 38 was controlled so that the temperature detected by the temperature detection sensor 42 was maintained at the temperature set by the temperature setting means 56, for example, 35 ° C., and the fermentation heating was set by the timer time setting means 58. Done for hours. In this fermentation step, the temperature of the inner edge of the inner pot 24 is detected by the second temperature detection sensor 42, and the inner edge of the inner pot 24 during fermentation is used by utilizing the temperature of the inner pot.
Temperature information of the whole inside can be obtained accurately.

When the firing mode is selected, the fermented yeast is fired as shown in FIG. 9 according to the firing control program. When the sintering mode is selected, the sintering step shown in FIG. 9 is performed.
And the temperature of the inner pot 24 is detected by a first temperature detection sensor 40. That is, in the firing mode, the proportional valve 16 is opened, the electromagnetic switching valve 94 is opened in a state where a spark is generated from the ignition device 10, the firing process is performed by the combustion heating from the gas burner 8, and the control means 80 (1) The proportional valve 16 is controlled based on the temperature detected by the temperature detection sensor 40, and the firing is performed as shown in FIG.
When the temperature detected by the first temperature detecting sensor 40 reaches the firing end temperature, for example, 180 ° C., the proportional valve 16 is closed, the electromagnetic valve 94 is closed, and the heating by the gas burner 8 is stopped. This ends the firing step. In the firing step, the temperature of the bottom of the inner pot 24 is detected by the first temperature detection sensor 40, and by using the temperature of the bottom of the pot, it is possible to accurately know the completion of cooking of the contents.

In this embodiment, the firing end temperature is set to the high cut temperature, that is, the temperature for forcibly stopping the operation of the heating means (gas burner 8 and electric heater 38). With this configuration, when the temperature detected by the first temperature detection sensor 40 reaches 180 ° C. in the rice cooking mode or the steaming mode, the abnormality detection unit 90 generates an abnormality signal, and the control unit 80 performs the operation based on the abnormality signal. The operation of the heating means (gas burner 8) is forcibly stopped. Also,
When the temperature detected by the first temperature detection sensor 40 reaches 180 ° C. in the firing mode, the abnormality detection means 90 generates an abnormality signal as described above, and the operation of the electric heater 38 is stopped using this abnormality signal. Then, the firing step is completed. With this configuration, the control by the control unit 80 can be simplified. Note that, instead of the above-described configuration, the high cut temperature may be set higher than the firing end temperature.

When the steaming mode is selected, the ingredients to be cooked are steamed and cooked according to the steaming control program as shown in FIG. When the steaming mode is selected, the steaming time is set by the timer time setting means 58, and the steaming step shown in FIG. 10 is performed during the set steaming time.
In this steaming step, the inner pot 24 is heated by the gas burner 8, and the temperature of the inner pot 24 is controlled by the first temperature detection sensor 40.
Is detected by That is, in the steaming mode, the steaming step is performed by the combustion heating from the gas burner 8 in the same manner as described above, and the control means 80 controls the first temperature detection sensor 40 so that the water in the inner pot 24 is maintained in a boiling state. The proportional valve 16 is controlled based on the detected temperature, and steam cooking is performed by the steam generated in the inner pot 24. Then, when the steam cooking is performed for the time set by the timer time setting means 58, the control means 80 stops the operation of the gas burner 8, and the steaming process ends. In the steaming process, the bottom temperature of the inner pot 24 is detected by the first temperature detection sensor 40.

As described above, one embodiment of the rice cooker according to the present invention has been described. However, the present invention is not limited to such an embodiment, and various changes and modifications can be made without departing from the scope of the present invention. is there. For example, in the illustrated embodiment, the present invention is applied to a rice cooker capable of performing the steaming step. However, the present invention can be similarly applied to a rice cooker that cannot perform such a steaming step. Further, for example, in the illustrated embodiment, the heating means is described as being applied to a gas burner and an electric heater. However, the present invention is not limited to this, and the heating means is constituted only by the electric heater. The same can be applied to objects.

[0025]

According to the rice cooker with the fermentation function of the first aspect of the present invention, in the fermentation mode, the second temperature detecting sensor for detecting the temperature of the pot edge is used, and the control means uses the second temperature detecting sensor.
Since the heating means is controlled to be heated based on the temperature detected by the temperature detection sensor, the temperature information of the entire inner pot can be accurately grasped and the yeast can be fermented as required.

According to the rice cooker with fermentation function of the second aspect of the present invention, in the firing mode, the first temperature detecting sensor for detecting the temperature at the bottom of the pot is used. Since the control means controls the heating of the heating means based on the temperature, the temperature change of the contents in the inner pot can be accurately detected, and the bread can be baked as required.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of a rice cooker according to the present invention.

FIG. 2 is a simplified sectional view showing an inner pot of the rice cooker of FIG. 1 and a configuration related thereto.

FIG. 3 is a perspective view showing an annular support member of the rice cooker of FIG. 1 and a configuration related thereto.

FIG. 4 is a front view showing an operation panel of the rice cooker of FIG. 1;

FIG. 5 is a block diagram schematically showing a control system of the rice cooker of FIG.

FIG. 6 is a flowchart showing a flow of cooking of the rice cooker of FIG. 1;

FIG. 7 is a diagram showing an example of the relationship between the cooking time and the cooking temperature in the cooking mode.

FIG. 8 is a diagram showing an example of the relationship between fermentation time and fermentation temperature in the fermentation mode.

FIG. 9 is a diagram illustrating an example of a relationship between a firing time and a firing temperature in a firing mode.

FIG. 10 is a diagram showing an example of a relationship between a steaming time and a steaming temperature in a steaming mode.

[Brief description of reference numerals]

 2 Rice Cooker Main Body 8 Gas Burner 12 Fuel Gas Supply System 22 Housing Space 24 Inner Kettle 26 Annular Support Member 38 Electric Heater 40 First Temperature Detection Sensor 42 Second Temperature Detection Sensor 50 Operation Panel 54 Cooking Mode Selection Means 80 Control Means

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuko Kuwahara 4-1-2, Hiranocho, Chuo-ku, Osaka-shi F-term in Osaka Gas Co., Ltd. (reference) 4B040 AA03 AA06 AA08 AB04 AC16 AD04 AE05 CA02 CA16 LA04 NB01 NB11 4B053 BJ03 BJ07 BJ12 BL11 4B055 AA03 AA04 BA09 BA34 CA64 CD02 DB02 DB08 GB08 GC01

Claims (2)

[Claims] 1. A rice cooker main body, an inner pot accommodated in the rice cooker main body, and heating means for heating the inner pot,
Cooking mode selection means for selecting a rice cooking mode for cooking rice, a fermentation mode for fermenting yeast, and a baking mode for baking bread, and controlling a heating state of the heating means in the cooking mode selected by the cooking mode selection means. A rice cooker with a fermentation function, comprising: a first temperature detection sensor for detecting a bottom temperature of the inner pot; and a second temperature sensor for detecting a pot edge temperature of the inner pot. A second temperature detection sensor, wherein when the fermentation mode is selected by the cooking mode selection means, the control means controls a heating state of the heating means based on a temperature detected by the second temperature detection sensor. A rice cooker with a fermentation function. 2. The method according to claim 1, wherein the control unit selects the first mode when the cooking mode selection unit selects the baking mode.
The rice cooker with a fermentation function according to claim 1, wherein a heating state of the heating means is controlled based on a temperature detected by a temperature detection sensor.