JP2004095312A - Cooker - Google Patents

Abstract

An object of the present invention is to accurately detect the temperature of a cooking container placed on a cooking device and used.
A cooking pot is heated by an induction coil. Further, the temperature of the contents in the cooking pot 3 is detected by the radiation temperature detecting means 16 provided on the range hood 4 above the cooking pot 3. Since the temperature is directly detected by the radiant heat from the contents, the temperature detection accuracy is not affected by the contact state between the top plate of the cooking device main body 1 and the cooking pot 3.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooking device for heating a cooking pot used in ordinary households, and more particularly to a cooking device with improved container temperature detection method and high-precision temperature detection and improved safety.
[0002]
[Prior art]
Conventionally, as a cooking device of this type, for example, Japanese Patent Application Laid-Open No. H03-208288 discloses a cooking device provided with a heat-sensitive element and an infrared sensor. 2. Description of the Related Art There has been proposed a cooking device capable of performing high-speed and high-precision heating control of a cooking vessel by detecting a rapid change in temperature of an object to be heated by detecting the temperature through a material. In Japanese Patent Application Laid-Open No. H03-25885, the temperature of the content is directly detected by a wireless probe and the control content is transmitted to the control means on the main body side via a heating signal, thereby controlling the temperature of the content to a desired value. Cookers that accurately follow the cooking temperature have been proposed.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 03-208288
[Patent Document 2]
JP-A-H03-25885 [0005]
[Problems to be solved by the invention]
In the cooking device having the above-described conventional configuration, the detection method via the infrared transmitting material has a high possibility that the detection accuracy is deteriorated due to contamination or the like due to long-term use. In addition, the wireless probe method has a fundamental problem that it does not adapt to the sense of cleanliness of the Japanese people, and at present it has not been realized as an actual product.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned conventional problems, the cooking device of the present invention is provided with radiation temperature detecting means for directly detecting infrared radiation light from the contents in the cooking pot, and directly performs temperature detection with radiant heat from the cooking pot. By directly measuring the temperature of the pan, it is possible to provide a cooker that is highly productive and has high temperature detection accuracy and can realize good cooking heating control.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the first aspect of the present invention, there is provided a top plate on which a cooking pot is placed, heating means for heating the cooking pot, and radiant temperature detection installed above the cooking pot and detecting infrared radiation from inside the cooking pot. Means, an infrared communication means for transmitting information on the temperature detected by the radiation temperature detection means, and a control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. With simple installation work, the temperature of the food is directly detected by infrared rays, so that the temperature of the contents can be detected with high accuracy.
[0008]
According to a second aspect of the present invention, there is provided a top plate on which a cooking pot is placed, heating means for heating the cooking pot, and radiation temperature detection arranged at a side of the cooking pot to detect infrared radiation from the cooking pot. Means, an infrared communication means for transmitting temperature information detected by the radiation temperature detection means, and a control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. Pot temperature can be detected.
[0009]
The invention according to claim 3 is a top plate on which a cooking pot is placed, heating means for heating the cooking pot, temperature detection means for detecting the temperature of the cooking pot by attracting the cooking pot with a magnet. Infrared communication means for transmitting temperature information detected by the temperature detection means, and control means for controlling the heating of the heating means based on the temperature information received from the infrared communication means, the temperature of the cooking pot with high accuracy Can be detected.
[0010]
According to a fourth aspect of the present invention, there is provided a top plate on which a cooking pot is placed, heating means for heating the cooking pot, and a temperature formed under the cooking pot to form a sheet capable of detecting the temperature of the cooking pot. Detecting means, infrared communication means for transmitting temperature information detected by the temperature detecting means, and control means for controlling the heating of the heating means based on the temperature information received from the infrared communication means, so that cooking can be performed with high accuracy. The temperature at the bottom of the pot can be detected.
[0011]
According to the fifth aspect of the present invention, the temperature detecting means and the communication means use the electric power received by the coil disposed on the outer periphery of the seat as a power source, so that the battery of the temperature detecting section becomes unnecessary.
[0012]
According to a sixth aspect of the present invention, the temperature of the cooking pot is detected by a top plate on which the cooking pot is placed, heating means for heating the cooking pot, and an optical fiber buried in a sheet laid under the cooking pot. Temperature detecting means, an infrared communication means for transmitting the temperature information detected by the temperature detecting means, and a control means for controlling the heating of the heating means based on the temperature information received from the infrared communication means. The temperature at the bottom of the cooking pot can be detected.
[0013]
In the invention according to claim 7, the temperature information can be transmitted more accurately by using a wireless communication means as the communication means.
[0014]
The invention according to claim 8 is provided with resistance value conversion means for converting the temperature information received by the communication means into a resistance value of the thermistor at that temperature and outputting the resistance value, and can be installed in an existing cooking device.
[0015]
According to the ninth aspect of the present invention, since the radiation temperature detecting means is attached to the range hood, installation work can be performed without installing a special mounting tool on the ceiling or wall for installing the radiation temperature detecting means. Easy.
[0016]
According to a tenth aspect of the present invention, the radiation temperature detecting means is mounted above the intake port of the range hood, so that steam, oil, and the like from the pan are removed by the ventilation fan of the range hood, and The light receiving portion can be made hard to be stained.
[0017]
According to a twelfth aspect of the present invention, when the heating area of the heating means is projected upward, the radiant temperature detection means is arranged outside the projection, so that steam or oil from the pan can be removed from the range hood. And the light-receiving part of the radiation thermometer can be hardly contaminated.
[0018]
According to a twelfth aspect of the present invention, the radiation temperature detecting means includes a lens, and a means for removing fogging of the lens, so that steam or oil from a pot is removed so as not to adhere to the lens and malfunction. In addition, the light receiving part of the radiation thermometer can be made hard to become dirty.
[0019]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0020]
(Example 1)
FIG. 1 is an installation diagram of a cooking device according to a first embodiment of the present invention, and FIG. 2 is a block diagram of the device. As shown in FIG. 1, a cooking pot 3 is placed on a top plate of a cooking device main body 1 having an operation / display unit 1, and cooking is performed by a radiation temperature detecting means (not shown) installed in a range hood 4. The temperature of the contents in the pot 3 is directly detected. Reference numeral 5 denotes an image line of a heat radiation light beam emitted from the contents. In FIG. 2, an inverter 9 is configured by the inductance of the heating coil 6, the resonance capacitor 7, and the switching element 8, and supplies a voltage obtained by rectifying a commercial power supply 10 by a rectifier circuit 11. The inverter 9 is controlled by a control circuit 12 so as to operate in a predetermined frequency range. The inverter 9 induction-heats the cooking pot 3 placed on the top plate of the cooking device main body 1 to realize a heating means 13. Reference numeral 14 denotes a DC power supply, and 1 denotes an operation / display unit.
[0021]
Reference numeral 16 denotes a radiant temperature detecting means installed in the range hood 4 for detecting infrared rays radiated from the contents of the cooking pot 3, and 17 denotes an infrared ray for transmitting the temperature information detected by the radiant temperature detecting means 16 as an infrared signal. The transmitting means 18 is an infrared receiving means for receiving the infrared signal, restoring the temperature information and outputting it to the control means 12. Based on the detected temperature, the control circuit 12 turns on and off the inverter 9 so that the surface temperature of the contents in the cooking pot 3 becomes a temperature value suitable for each cooking (for example, 60 ° C. to 70 ° C. for curry) to adjust the temperature. Then, the amount of heating to the cooking pot 3 is controlled. The control circuit 12 is constituted by a logic circuit or a microcomputer. The power supply of the radiation temperature detecting means 16 and the infrared transmitting means 17 uses a dry battery, a rechargeable battery, or a commercial power supply.
[0022]
Note that there is a certain correlation between the temperature T of the contents of the cooking pot and the maximum peak wavelength λmax of the infrared radiation energy. When T = 200 ° C., λmax = about 6.1 μm, and T = 150 ° C. When λmax = about 6.8 μm, when T = 140 ° C., λmax = about 7.0 μm, when T = 100 ° C., λmax = about 7.8 μm, and when T = 20 ° C., λmax = about 9.9 μm.
[0023]
Therefore, the effective measurement wavelength range of the radiation temperature detecting means 16 may be set to 5 to 10 μm. In addition, since the emissivity of general food is 0.8 or more, highly accurate temperature detection is possible.
[0024]
Note that the radiation temperature detecting means may be, for example, a cupboard at a location above the cooking pot.
[0025]
Further, since the radiation temperature detecting means is attached to the range hood, installation work can be easily performed without installing a special mounting tool for installing the radiation temperature detecting means on a ceiling or a wall.
[0026]
Further, when the radiation temperature detecting means is mounted above the intake port of the range hood, steam, oil, etc. from the pan are removed by the ventilation fan of the range hood, and the light-receiving portion of the radiation thermometer can be made hard to become dirty.
[0027]
In addition, when the radiation temperature detection means projects the heating area of the heating means upward, if it is arranged outside this projection, steam and oil from the pot are removed by a ventilation fan of a range hood, The light-receiving part of the radiation thermometer can be hardly contaminated.
[0028]
In addition, the radiation temperature detection means removes the fogging of the lens of the light receiving unit, for example, by arranging a blowing means beside, or periodically wiping the lens surface, by providing a wiper, the steam from the pan or the like Oil and the like are removed so as not to adhere to the lens and malfunction, and the light-receiving portion of the radiation thermometer can be made harder to contaminate, thereby improving the reliability of detection.
[0029]
(Example 2)
FIG. 3 is an installation diagram of a cooking device according to a second embodiment of the present invention, and FIG. 4 is a block diagram of the cooking device. In the present embodiment, the basic configuration as a cooker is the same as that of the first embodiment, and a description of the basic configuration will be omitted. In this embodiment, the radiation temperature detecting means 30 is movably placed on a top plate, and this point will be mainly described. The radiation temperature detecting means 30 placed at a position facing the cooking pot 3 detects infrared rays emitted from the cooking pot 3 to detect the temperature. The detected temperature information is displayed on the temperature display section 31 and output to the infrared transmitting means 17 for transmitting as an infrared signal. The infrared receiving means 18 receives the infrared signal, restores the temperature information, and outputs it to the control means 12. Based on this output signal, the control circuit 12 turns on and off the inverter 9 to adjust the temperature so that the surface temperature of the cooking pot 3 becomes a temperature value suitable for each cooking, and controls the amount of heating to the cooking pot 3. The user can proceed with cooking while checking the temperature of the cooking pot 3 on the temperature display section 31, and the usability is greatly improved.
[0030]
Since the emissivity of infrared rays greatly varies from 0.1 to 1.0 depending on the material and surface condition of the cooking pot, the emissivity measuring means 30 is provided with the emissivity measuring means 30 to correct the emissivity.
[0031]
(Example 3)
FIG. 5 is an installation diagram of a cooking device according to a third embodiment of the present invention, and FIG. 6 is a block diagram of the cooking device. In the present embodiment, the basic configuration as a cooker is the same as that of the first embodiment, and a description of the basic configuration will be omitted. In this embodiment, the radiation temperature detecting means 40 is attracted to the cooking pot 3 by a magnet, and this point will be mainly described. The flexible temperature detecting means 50 is attached to the side surface of the cooking pot 3. The temperature detecting means 50 detects the side temperature of the cooking pot 3 and outputs the temperature information to the infrared transmitting means 17. The infrared receiving means 18 receives the infrared signal transmitted from the infrared transmitting means 17, restores the temperature information, and outputs it to the control means 12. Based on this output signal, the control circuit 12 turns on and off the inverter 9 to adjust the temperature so that the side surface temperature of the cooking pot 3 becomes a temperature value suitable for each cooking, and controls the amount of heating to the cooking pot 3. Since the temperature detecting means 50 contacts the cooking pot 3 and detects the temperature, more accurate temperature detection can be performed.
[0032]
Note that a thermistor, a platinum temperature measuring element, a thermocouple, or the like is used as the temperature detecting means 50.
[0033]
(Example 4)
FIG. 7 is an installation diagram of a cooking device according to a fourth embodiment of the present invention, and FIG. 8 is a block diagram of the cooking device. In the present embodiment, the basic configuration as a cooker is the same as that of the first embodiment, and a description of the basic configuration will be omitted. In this embodiment, the temperature of the cooking pot is detected by laying a temperature detecting means formed in a sheet shape capable of detecting the temperature below the cooking pot 3, and this point will be mainly described.
[0034]
The above-mentioned temperature detecting means 60 is laid on the lower surface of the cooking pot 3 to detect the bottom surface temperature of the cooking pot 3, and the temperature information is output to the infrared transmitting means 17. The infrared receiving means 18 receives the infrared signal transmitted from the infrared transmitting means 17, restores the temperature information, and outputs it to the control means 12. Based on this output signal, the control circuit 12 turns on and off the inverter 9 to adjust the temperature so that the side surface temperature of the cooking pot 3 becomes a temperature value suitable for each cooking, and controls the amount of heating to the cooking pot 3. Since the temperature detecting means 60 contacts the bottom surface of the cooking pot 3 and detects the temperature, a temperature closer to the contents can be detected.
[0035]
It should be noted that the temperature detecting means 60 uses a printed resistor such as platinum or an integrated thermocouple.
[0036]
(Example 5)
FIG. 9 is a block diagram of a cooker according to Embodiment 5 of the present invention. In this embodiment, the basic configuration as a cooker is the same as that of the fourth embodiment, and a description of the basic configuration will be omitted. This embodiment is different from the above-described fourth embodiment in the configuration performed by the electric power received by the coil arranged on the outer periphery of the seat, and this point will be mainly described.
[0037]
Reference numeral 61 denotes a coil arranged on the outer periphery of the sheet type temperature detecting means 60, and 62 denotes a rectifying means for rectifying the high frequency voltage received by the coil 61. Using the electric power received from the heating coil 6, the temperature detecting means 60 detects the bottom surface temperature of the cooking pot 3 and outputs the temperature information to the infrared transmitting means 17. The infrared receiving means 18 receives the infrared signal transmitted from the infrared transmitting means 17, restores the temperature information, and outputs it to the control means 12. Based on this output signal, the control circuit 12 turns on and off the inverter 9 to adjust the temperature so that the side surface temperature of the cooking pot 3 becomes a temperature value suitable for each cooking, and controls the amount of heating to the cooking pot 3. Since the temperature detecting means 60 contacts the bottom surface of the cooking pot 3 and detects the temperature, a temperature closer to the contents can be detected, and a dry battery as a power source is not required.
[0038]
(Example 6)
FIG. 10 is a sectional view of a main part of a cooking device according to a sixth embodiment of the present invention. In the present embodiment, the basic configuration as a cooker is the same as that of the first embodiment, and a description of the basic configuration will be omitted. In this embodiment, the temperature is detected by embedding an optical fiber in the top plate of the cooking device main body, and this point will be mainly described.
[0039]
The optical fiber 70 embedded in the top plate is irradiated with laser light from a laser light emitting means 71 (not shown), and is received by a laser light receiving means 72 (not shown) at the other end of the optical fiber 70, and has a degree of polarization. Calculate and detect the temperature. The temperature information is output to the infrared transmitting means 17. The infrared receiving means 18 receives the infrared signal transmitted from the infrared transmitting means 17, restores the temperature information, and outputs it to the control means 12. Based on this output signal, the control circuit 12 turns on and off the inverter 9 to adjust the temperature so that the side surface temperature of the cooking pot 3 becomes a temperature value suitable for each cooking, and controls the amount of heating to the cooking pot 3. Since the sheet-type temperature detecting means 60 contacts the bottom surface of the cooking pot 3 and detects the temperature, the temperature closer to the contents can be detected.
[0040]
In order to improve the assemblability at the time of manufacturing, the optical fiber 70, the laser light emitting means 71, and the laser light receiving means 72 are configured to be mounted on a top plate.
[0041]
(Example 7)
11 to 14 show a configuration of a seventh embodiment of the present invention. In this embodiment, the basic configuration as a cooker is the same as in Embodiments 1 to 6, and a description of the basic configuration will be omitted. In this embodiment, a wireless transmission means 20 and a wireless reception means 21 are provided, and the communication means in the description of the first to sixth embodiments is wireless, and this point will be mainly described. Since the transmission distance is short, a low-power radio such as a weak radio is used. Unlike the infrared communication means, even if there is an obstacle in the receiving unit, the reception can be performed without any trouble, and a more secure cooker can be obtained. Further, since the transmission power is smaller than that of the infrared type, the life of the dry battery is extended.
[0042]
(Example 8)
In this embodiment, the basic configuration as a cooker is the same as in Embodiments 1 to 6, and a description of the basic configuration will be omitted. In this embodiment, the temperature information is converted into the resistance value of the thermistor at that temperature and output, and this point will be mainly described. The temperature information received by the infrared receiving means 17 or the wireless receiving means 21 is converted into a resistance value of the thermistor at that temperature by a resistance value converting means (not shown) and output.
[0043]
Generally, the temperature sensor input circuit of the cooker is a divided circuit of a thermistor and a fixed resistor. Therefore, the resistance value conversion means may be a circuit that outputs an analog voltage corresponding to the temperature by a D / A converter. By doing so, the existing cooking device can be easily installed by replacing it with a thermistor.
[0044]
【The invention's effect】
The cooking device according to the present invention includes a top plate on which a cooking pot is placed, heating means for heating the cooking pot, and radiant temperature detecting means installed above the cooking pot and detecting infrared radiation from inside the cooking pot. And infrared communication means for transmitting the temperature information detected by the radiation temperature detection means, and control means for controlling the heating of the heating means based on the temperature information received from the infrared communication means, the temperature detection accuracy High and good cooking heating control can be realized.
[Brief description of the drawings]
FIG. 1 is an installation diagram of a cooker according to a first embodiment of the present invention. FIG. 2 is a block diagram of the same device. FIG. 3 is a block diagram of a cooker according to a second embodiment of the present invention. FIG. 5 is an installation diagram of a cooking device according to a third embodiment of the present invention. FIG. 6 is a block diagram of the cooking device. FIG. 7 is a installation diagram of a cooking device according to a fourth embodiment of the invention. 9 is a block diagram of a cooker according to a fifth embodiment of the present invention. FIG. 10 is a sectional view of a main part of a cooker according to a sixth embodiment of the present invention. FIG. 11 is a block diagram of a cooker according to a seventh embodiment of the present invention. FIG. 12 is a block diagram of a cooker according to a seventh embodiment of the present invention. FIG. 13 is a block diagram of a cooker according to a seventh embodiment of the present invention. FIG. 14 is a block diagram of a cooker according to a seventh embodiment of the present invention. Description]
DESCRIPTION OF SYMBOLS 1 Operation / display part 2 Cooker main body 3 Cooking pan 4 Range hood 5 Radiation light flux image 6 Heating coil 7 Resonant capacitor 8 Switching element 9 Inverter 12 Control circuit 13 Heating means 16 Radiation temperature detecting means 17 Infrared transmitting means 18 Infrared receiving means 20 Wireless transmitting means 21 Wireless receiving means 31 Temperature display section 61 Power receiving coil 62 Rectifying means 70 Optical fiber

Claims (12)

A top plate on which the cooking pot is placed, heating means for heating the cooking pot, radiant temperature detecting means installed above the cooking pot and detecting infrared radiation from inside the cooking pot, and radiant temperature detecting means A cooker comprising: infrared communication means for transmitting information on the temperature detected by the infrared communication means to the heating means; and control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. A top plate on which the cooking pot is placed, heating means for heating the cooking pot, radiant temperature detecting means arranged on the side of the cooking pot to detect infrared radiation from the cooking pot, and radiant temperature detecting means A cooker comprising: infrared communication means for transmitting information on the temperature detected by the infrared communication means to the heating means; and control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. A top plate on which the cooking pan is placed; heating means for heating the cooking pot; temperature detection means for attracting the cooking pot with a magnet to detect the temperature of the cooking pot; and temperature detected by the temperature detection means. A cooker comprising: infrared communication means for transmitting information; and control means for controlling heating of the heating means based on temperature information received from the infrared communication means. A top plate on which the cooking pot is placed, heating means for heating the cooking pot, temperature detection means laid under the cooking pot to form a sheet capable of detecting the temperature of the cooking pot, and temperature detection means A cooker comprising: infrared communication means for transmitting temperature information detected by the control means; and control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. The cooking device according to claim 7 or 8, wherein the temperature detection means and the communication means are configured to use electric power received by a coil disposed on an outer periphery of the seat as a power supply. A top plate on which the cooking pot is placed; heating means for heating the cooking pot; temperature detection means for detecting the temperature of the cooking pot by an optical fiber embedded in a sheet laid under the cooking pot; A cooker comprising: infrared communication means for transmitting temperature information detected by the detection means; and control means for controlling heating of the heating means based on the temperature information received from the infrared communication means. The cooker according to any one of 1 to 6, wherein the communication unit is a wireless communication unit. The cooker according to any one of claims 1 to 7, further comprising resistance value conversion means for converting the temperature information received by the communication means into a resistance value of the thermistor at the temperature and outputting the resistance value. The cooker according to claim 1, wherein the radiation temperature detection means is attached to a range hood. The cooker according to claim 1, wherein the radiation temperature detecting means is mounted above an intake port of the range hood. 2. The cooking device according to claim 1, wherein the radiation temperature detecting means is arranged outside the projection when the heating area of the heating means is projected upward. The cooker according to claim 1, wherein the radiation temperature detecting unit includes a lens, and a unit that removes fogging of the lens.

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