JP2005209373A - Heating cooker and cookware - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate inconvenience of using cookware 6 taking account of its setting position. <P>SOLUTION: A plurality of infrared LEDs 39 are mounted on the cookware 6, and a plurality of the infrared LEDs 39 forms an infrared transmission region of 360° connecting in an annular form in a set state of the cookware 6. With such constitution, an infrared receiving circuit 48 falls within the infrared transmission region at whatever angle the cookware 6 is set, and it becomes unnecessary to care about a set angle of the cookware 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooking utensil that wirelessly transmits temperature information to a heating cooker and a heating cooker that controls cooking contents based on temperature information wirelessly transmitted from the cooking utensil.

In the heating cooker, it has been proposed to control the heating content based on temperature information transmitted wirelessly from the cooking utensil. In the case of this configuration, since the temperature of the cooking utensil can be directly detected in real time, high-precision heating control that matches the actual condition of the cooked food in the cooking utensil is possible.
JP 2003-139385 A

  In the case of the cooking device, when the temperature information receiving means is out of the transmission range of the transmitting means, the temperature information cannot be received, and the heating content cannot be controlled based on the wireless temperature information. For this reason, there exists inconvenience which uses a cooking appliance in consideration of a setting attitude | position.

The inventions according to claims 1 to 9 alleviate the inconvenience of using cooking utensils in consideration of the set posture, and means for solving the common problems is claim 1.・ As described in 2.5. Hereinafter, the invention according to the main claims will be described together with the meanings of the terms.
<Explanation of Inventions According to Claims 1 and 2>
The invention according to claims 1 and 2 is provided with a plurality of receiving units on the cooking device side, and receives temperature information wirelessly transmitted from the cooking utensil by a part or all of the receiving units according to the set posture of the cooking utensil. It is.
1) Receiving means: An aggregate of a plurality of receiving units. These receiving units can receive temperature information wirelessly transmitted from the outside by magnetism, electromagnetic waves, and the like, and the reception target of the temperature information is a common transmission source or a plurality of common transmission sources. It is a requirement. This temperature information refers to the temperature information of the cooking utensil itself or the temperature information of the food in the cooking utensil. The temperature change rate of the appliance, the absolute temperature of the cooked food, the relative temperature relative to the reference value of the cooked food, and the temperature change rate of the cooked food are examples of temperature information.
2) Control means: Controls cooking contents based on driving control of the heating means, and switches the inverter circuit that converts a DC power source into a high-frequency power source to control the amount of electric power supplied from the inverter circuit to the heating means. It is preferable to control the above. This control means controls the heating means based on the reception result of the receiving means, and the cooking content is controlled based on temperature information from the outside.
<Explanation of Inventions According to Claims 3 to 4>
The inventions according to claims 3 to 4 refer to correspondence when a plurality of temperature information is simultaneously received. In this case, one of the plurality of temperature information is selected, and only the temperature information selection result is effectively handled as control data.
<Explanation of Invention According to Claim 5>
The invention according to claim 5 prevents the transmission unit from receiving unauthorized wireless temperature information by shielding it. This non-regular radio temperature information is temperature information from a cooking utensil that is not heated by the heating means. For example, radio temperature information from an adjacent cooking utensil corresponds to the non-regular radio temperature information.
<Explanation of Invention According to Claim 6>
The invention which concerns on Claim 6 provides a some transmission part in a cooking appliance, and accommodates the receiving part of a heating cooker in the transmission range of a some transmission part according to the setting attitude | position of a cooking appliance.
1) Container part: Refers to the input part into which the food is input.
2) Temperature detection means: It is mechanically connected to the cooking utensil and detects the temperature of the container part or the temperature of the food as the cooking temperature.
3) Transmitting means: An aggregate of a plurality of transmitting units. These transmitters are capable of wirelessly transmitting temperature information using magnetism, electromagnetic waves, or the like, and it is a requirement that the transmission target of temperature information is a common reception source or a plurality of common reception sources. This temperature information is generated based on the detection result of the cooking temperature, and the details of the temperature information are as described above.
<Explanation of Invention of Claim 7>
The invention according to claim 7 has a plurality of transmitters arranged in a circular shape at the same height. This circular arrangement refers to arrangement along a circular container portion, and is not limited to the arrangement in a perfect circle.
<Explanation of Invention of Claim 8>
The invention which concerns on Claim 8 forms the transmission area | region connected cyclically | annularly in the state which set the cooking utensil to the heating cooker, and accommodates the receiving part of a heating cooker in a transmission area irrespective of the setting attitude | position of a cooking utensil. The transmission area refers to an area where temperature information can be communicated.
<Description of the Invention of Claim 9>
The invention according to claim 9 drives a plurality of transmitters in order. In other words, the plurality of transmission units are sequentially driven with a time difference without simultaneously driving, and the transmission timing of the temperature information from the plurality of transmission units is shifted.

According to the first to fifth aspects of the present invention, the temperature information wirelessly transmitted from the cooking utensil can be received by the receiving unit corresponding to the setting posture of the cooking utensil, so the cooking utensil is used in consideration of the setting posture. The inconvenience to be eased.
According to the invention which concerns on Claims 6-9, since the receiving part of a heating cooker can be stored in either of the transmission range according to the setting attitude | position of a cooking utensil, it uses it considering a setting attitude | position. Inconvenience is alleviated.

<Example 1>
As shown in FIG. 1, a cabinet 2 is fixed inside the system kitchen 1. A top plate 3 made of heat-resistant glass is fixed to the upper surface of the cabinet 2, and the top plate 3 is exposed from the upper surface of the system kitchen 1. The top plate 3 is colored and opaque, and the inside of the cabinet 2 is visually invisible through the top plate 3.

  A circular left mark 4 and a circular right mark 5 are formed on the top plate 3. These left mark 4 and right mark 5 are colored in a color different from the remaining portion, and function as a mark for displaying the placement area of the cooking utensil 6 to the user. The cooking utensil 6 is composed of a one-handed pan made of a magnetic material, and has a container part 8 and a handle part 9 protruding sideways from the container part 8 as shown in FIG. The former container part 8 is used to put a cooked product, and has a circular horizontal cross section.

  As shown in FIG. 1, an operation panel 10 is fixed to the front surface of the cabinet 2, and a left operation unit 11 is attached to the operation panel 10. The left operation unit 11 is used to input cooking conditions when the cooking utensil 6 is placed on the left mark 4 and cooking is performed. An automatic water heater key 13, a left heating dial 14, a tempura key 15, and a timer 16 are input. have. A right operation unit 12 is attached to the operation panel 10. The right operation unit 12 is used for inputting cooking conditions when the cooking utensil 6 is placed on the right mark 5 and cooking is performed, and includes a right heating power dial 17 and a timer 18.

As shown in FIG. 3, the left coil 19 and the right coil 20 are housed inside the cabinet 2. The left coil 19 and the right coil 20 are fixed to the upper surface of the annular coil base 21 as shown by the left coil 19 in FIG. It is arranged below.
As shown in FIG. 2, a left internal temperature sensor 22 made of a thermistor is housed inside the cabinet 2 and is located below the left mark 4. The temperature sensing part of the left internal temperature sensor 22 is a sensor spring. It is pressed against the lower surface of the top plate 3 by a spring force. The left internal temperature sensor 22 corresponds to indirect temperature detecting means for indirectly detecting the surface temperature Ts of the cooking utensil 6 via the top plate 3, and the lead wire 24 of the left internal temperature sensor 22 is connected to the left coil 19. Are inserted into the inner peripheral portion of the coil base 21 and the inner peripheral portion of the coil base 21.

  As shown in FIG. 3, a right internal temperature sensor 23 is housed inside the cabinet 2 below the right mark 5, and the temperature sensing part of the right internal temperature sensor 23 is a spring force of a sensor spring. It is pressed against the lower surface of the top plate 3. The right internal temperature sensor 23 is composed of a thermistor and indirectly detects the surface temperature Ts of the cooking utensil 6 via the top plate 3.

As shown in FIG. 3, a rectifier circuit 25 is housed inside the cabinet 2, and a commercial AC power supply 26 is electrically connected to an input terminal of the rectifier circuit 25. The rectifier circuit 25 converts the AC power supply 26 to a DC power supply, and is composed of a bridge circuit formed by bridge-connecting diodes and a smoothing capacitor.
Two inverter circuits 27 are electrically connected to the output terminal of the rectifier circuit 25. Each of these inverter circuits 27 converts a DC power source from the rectifier circuit 25 into a high-frequency voltage, and is mainly composed of switching elements connected in a half-bridge form. The left coil 19 and the right coil 20 are individually connected to the output terminals of these inverter circuits 27, and the left coil 19 and the right coil 20 are connected to the upper cooking utensil 6 based on the application of the high frequency current from the inverter circuit 27. Induction heating.

  As shown in FIG. 2, an electrical component case 28 is fixed to the outer peripheral surface of the cooking utensil 6. An external temperature sensor 29 is fixed in the electrical component case 28, and the temperature sensing part of the external temperature sensor 29 is in close contact with the outer peripheral surface of the container part 8 at the center in the vertical direction. The external temperature sensor 29 corresponds to a temperature detection means and a direct temperature detection means, and is composed of a thermistor that directly detects the surface temperature To of the container portion 8.

In the electrical component case 28, a pan-side power source 30 composed of a primary battery of 9V is fixed. Further, the electrical component case 28 is formed with a battery exchange port, and a battery cover is attached to the battery exchange port so as to be opened and closed. This battery exchange port refers to an opening for exchanging the pan-side power supply 30, and is opened and closed based on operating the battery cover.
A temperature data transmission unit 32 is electrically connected to the pan-side power supply 30 via a power switch 31. The power switch 31 is a self-holding slide switch fixed to the electrical component case 28. The power switch 31 closes the power supply path and opens the power supply path based on the sliding operation of the plunger 33. Mechanically held in the off state. That is, when the power switch 31 is turned on, the main power Vin of 9V is supplied from the pan-side power supply 30 to the temperature data transmission unit 32, and when the power switch 31 is turned off, the main power Vin is shut off.

  The temperature data transmission unit 32 is fixed in the electrical component case 28, and automatically starts when the main power source Vin is supplied from the pan-side power source 30, and based on the main power source Vin being shut off. And stop automatically. An external temperature sensor 29 is electrically connected to the temperature data transmission unit 32 in the electrical component case 28, and the temperature data transmission unit 32 detects a temperature signal from the external temperature sensor 29 and detects the temperature signal. The cooking information corresponding to is transmitted by infrared rays. That is, the temperature data transmission unit 32 automatically starts the cooking information transmission operation based on the ON operation of the power switch 31, and automatically stops the cooking information transmission operation based on the OFF operation of the power switch 31. It is.

  As shown in FIG. 4, the temperature data transmission unit 32 transmits a power supply circuit 34, a voltage detection circuit 35, an oscillation circuit 36, a temperature detection circuit 37, an LED drive circuit 38, four infrared LEDs 39, and a control circuit 40 by infrared transmission. It consists of electrically interconnecting in a possible finished form. The temperature data transmission unit 32 corresponds to an infrared transmission module that can be handled as a physically independent unit, and the power supply circuit 34 is 5 V based on stepping down the main power supply Vin from the pan-side power supply 30. The stabilized power supply Vo is generated. The power circuit 34 is composed of a series regulator, and the temperature data transmitter 32 is driven by using a stabilized power source Vo generated by the power circuit 34 as a power source.

  The voltage detection circuit 35 generates a voltage signal corresponding to the level of the main power supply Vin, and the voltage signal is given to the control circuit 40. The temperature detection circuit 37 generates a voltage signal at a level corresponding to the resistance change of the external temperature sensor 29, and the voltage signal is given to the control circuit 40. The control circuit 40 is composed of a microcomputer whose operating frequency is an 8 MHz pulse signal from the oscillation circuit 36, and has a CPU, a ROM, a RAM, and an I / O. The control circuit 40 corresponds to transmission control means.

  The four infrared LEDs 39 constitute a transmission means, and are arranged at the same height on the outer peripheral portion of the container portion 8 as shown in FIG. These infrared LEDs 39 are circularly arranged at equal angular intervals along the outer peripheral surface of the container portion 8, and each infrared LED 39 passes through the window portion of the electrical component case 28 as shown in FIG. It is inclined and arranged so that infrared rays may be projected diagonally to the outer peripheral side. These infrared LEDs 39 have one infrared light receiving circuit 48 as a common transmission target, and correspond to a transmission unit and an infrared element.

  FIG. 13 shows the relationship between the pulse current (mA) of the infrared LED 39 and the mounting angle (θ °) of the cooking utensil 6 for each height (th) of the cooking utensil 6. Indicates a state in which the infrared LED 39 faces the infrared light receiving circuit 48 (see FIG. 12), and the pulse current indicates a current value for causing the infrared LED 39 to emit light to a communicable level. This pulse current increases as the height dimension th of the cooking utensil 6 increases, and increases as the mounting angle deviation θ increases in the plus and minus directions. This pulse current can be secured only about 50 mA because of the battery life of the pan-side power supply 30. The directivity angle 2θ ° of each infrared LED 39 is a pulse current of about 50 mA for all of the cooking utensils 6 in the shallow pan with the height dimension “5 cm” to the cooking utensils 6 in the pan with the height dimension “20 cm”. The directivity angle 2θ of each infrared LED 39 is set to a common value “140 °”, and the total area where the four infrared LEDs 39 can perform infrared communication is the cooking appliance 6. It is set to be connected in an annular shape in a state of being placed on the left mark 4.

A control program is recorded in the ROM of the control circuit 40. This control program is activated based on the output of the INT signal from the timer circuit of the control circuit 40, and includes 1) voltage detection processing, 2) temperature detection processing, and 3) data transmission processing. The output of the INT signal is performed every set time (specifically, every 1 sec), and the control circuit 40 starts 1) voltage detection processing to 3) data based on starting the control program every set time. The transmission process is executed in the order for each set time. Hereinafter, 1) voltage detection processing to 3) data transmission processing will be described.
1) Voltage detection processing The CPU of the control circuit 40 A / D converts the voltage signal from the voltage detection circuit 35. Based on the A / D conversion result of the voltage signal, the voltage level of the main power source Vin is detected, and the detection result of the voltage level is compared with a determination value recorded in advance in the ROM. When it is detected that the detection result of the voltage level exceeds the determination value, it is determined that the main power supply Vin is at a normal level, and when the detection result of the voltage level is lower than the determination value, the main power supply Vin is at an abnormal level. It is determined that This abnormal level refers to the voltage level immediately before the control circuit 40 can no longer normally perform the processing operation. The voltage detection process is a process for determining whether the pan-side power supply 30 is consumed or not every set period. It is.
2) Temperature detection processing The ROM of the control circuit 40 records the relationship between the voltage signal (V) from the temperature detection circuit 37 and the surface temperature To (° C) of the cooking utensil 6, as shown in FIG. The CPU of the control circuit 40 performs A / D conversion on the voltage signal from the temperature detection circuit 37 and prepares the surface temperature To according to the A / D conversion result of the voltage signal from the recorded data of the ROM. The direct surface temperature To of the instrument 6 is detected. For example, when the A / D conversion result of the voltage signal is “4.1 V”, “75 ° C.” is detected as the surface temperature To. That is, the temperature detection process is a process for detecting the direct surface temperature To of the cooking utensil 6 for each set period.
3) Data transmission processing As shown in FIG. 4, four infrared LEDs 39 are electrically connected to the control circuit 40 via an LED drive circuit 38. The CPU of the control circuit 40 is 1) a power supply voltage Vin. And 2) a drive signal is generated based on the detection result of the surface temperature To. The four infrared LEDs 39 are controlled to emit light in a cyclic setting order by driving and controlling the LED drive circuit 38 based on the drive signal. From the four infrared LEDs 39, 1) the detection result of the power supply voltage Vin and 2) Cooking information including the detection result of the surface temperature To is sequentially transmitted by infrared rays. This data transmission process is executed every time the control program is started, and the four infrared LEDs 39 are: the first infrared LED 39 → the second infrared LED 39 → the third infrared LED 39 → the fourth infrared LED 39 → the fourth infrared LED 39. The cooking information is wirelessly transmitted by infrared rays based on the fact that light is emitted every 1 sec in the order of one infrared LED 39.

  The drive signal of the LED drive circuit 38 is generated by the control circuit 40 modulating the carrier signal having a set frequency (specifically, “31.25 kHz”) and a set duty ratio. This is done by changing That is, the data transmission process is a process for wirelessly transmitting cooking information from the four infrared LEDs 39 in a set order by generating a drive signal and controlling light emission of the four infrared LEDs 39 based on the drive signal.

  (A) and (b) of FIG. 7 show drive signals generated by the control circuit 40. The drive signals are based on the header S1, the battery remaining amount data S2, the pan data S3, the temperature data S4, and the stop bit S5. It is configured. The header S1 notifies the start of transmission of the drive signal, and is generated by turning off the carrier signal for 5 msec and 3 msec. The stop bit S5 notifies the end of transmission of the drive signal, and is generated by turning off the carrier signal for 1 msec and for 3 msec or more. The remaining battery data S2 to temperature data S4 specify the content of the data by a combination of bit “0” and bit “1”, and bit “0” is generated by turning the carrier signal on and off for 1 msec. , Bit “1” is generated by turning the carrier signal on for 1 msec and off for 2 msec.

  The battery remaining amount data S2 is composed of 1-bit data specifying whether or not the pan-side power supply 30 is consumed, and the CPU of the control circuit 40 1) has determined that the main power supply Vin is at a normal level in the voltage detection process. Sometimes 3) “0” is set as the remaining battery level data S2 immediately after the data transmission process, and “3” is set as the remaining battery level data S2 immediately after the 3) data transmission process when it is determined that the main power source Vin is at an abnormal level. 1 ”is set. The pan data S3 is unique data for specifying the type, material, size, and the like of the cooking utensil 6, and is recorded in advance in the ROM of the control circuit 40. This pan data S3 is composed of 3-bit data, and the CPU of the control circuit 40 3) sets the same recording data as pan data S3 for each data transmission process. The temperature data S4 is composed of 8-bit data specifying the surface temperature To of the cooking utensil 6, and the CPU of the control circuit 40 2) immediately after the detection result To of the temperature detection process 3) the temperature data S4 in the data transmission process Set to. The temperature data S4 corresponds to temperature information. For example, 2) When the detection result To of the temperature detection process is “75 ° C.”, “11010010” is set as the temperature data S4.

As shown in FIG. 3, an inverter control unit 41 is accommodated in the cabinet 2. This inverter control unit 41 individually controls the switching of both inverter circuits 27, and includes a control circuit 42, a drive circuit 43, a drive circuit 44, a temperature detection circuit 45, a current transformer 46, an input current detection circuit 47, and an infrared light receiving circuit. 48.
The control circuit 42 is mainly composed of a microcomputer, and has a CPU, a ROM, a RAM, and an I / O. The left operation unit 11 is electrically connected to the control circuit 42, and the control circuit 42 sets cooking conditions according to the operation content of the left operation unit 11, and outputs a drive signal based on the cooking condition setting result. Generate. One inverter circuit 27 is electrically connected to the control circuit 42 via a drive circuit 43. The drive circuit 43 performs switching control of the one inverter circuit 27 based on a drive signal from the control circuit 42, The cooking utensil 6 is induction-heated in a manner corresponding to the operation content of the left operation unit 11 based on flowing a high-frequency current through the left coil 19. The control circuit 42 corresponds to heating control means.

  The right operation unit 12 is electrically connected to the control circuit 42, and the control circuit 42 sets cooking conditions according to the operation content of the right operation unit 12, and generates a drive signal based on the setting result of the cooking conditions. To do. The other inverter circuit 27 is electrically connected to the control circuit 42 via a drive circuit 44, and the drive circuit 44 performs switching control of the other inverter circuit 27 based on a drive signal from the control circuit 42, The cooking utensil 6 is induction-heated in a mode corresponding to the operation content of the right operation unit 12 based on flowing a high frequency current through the right coil 20.

  The temperature detection circuit 45 generates a left voltage signal and a right voltage signal at levels according to resistance changes of the left internal temperature sensor 22 and the right internal temperature sensor 23, and the control circuit 42 receives the left voltage from the temperature detection circuit 45. The surface temperature Ts of the cooking utensil 6 is indirectly detected based on A / D conversion of the signal and the right voltage signal, and the pulse width of the drive signal is controlled based on the detection result of the surface temperature Ts.

  The current transformer 46 functions as current detection means for detecting the input current Iin given from the AC power supply 26 to the rectifier circuit 25, and the input current detection circuit 47 is electrically connected to the current transformer 46. The input current detection circuit 47 generates a voltage signal at a level corresponding to the input current Iin, and the control circuit 42 performs A / D conversion on the voltage signal from the input current detection circuit 47 to input voltage Iin. Detect the size of.

  The control circuit 42 detects the amount of electrical energy used for induction heating based on temporal integration of the detection result of the input current Iin, and detects the detection result of the electrical energy amount and the indirect surface temperature Ts. Heating information is acquired based on processing the result in software. The detection result of this surface temperature Ts corresponds to the consumption result of electric energy, and the control circuit 42 acquires the material, weight, size, etc. of the cooking utensil 6 as heating information based on the correlation between the two, The pulse width of the drive signal is controlled based on the heating information acquisition result. The heating information acquisition process according to the detection result of the input current Iin is executed when cooking is performed using the right coil 20, and when cooking is performed using the left coil 19, the infrared cooking information is stored. Heating information such as the material, weight, and size of the cooking utensil 6 is acquired based on the pan data S3, and the pulse width of the drive signal is controlled based on the infrared acquisition result of the heating information.

  The infrared light receiving circuit 48 is formed by modularizing an infrared sensor and a signal output circuit, and is disposed below the window portion 49. As shown in FIG. 1, the window 49 refers to a translucent portion formed on the top plate 3 at the outer periphery of the left mark 4, and the infrared light receiving circuit 48 is as shown in FIG. In addition, the infrared light receiving surface is inclined so as to face the infrared LED 39. The infrared light receiving circuit 48 generates cooking data based on receiving infrared cooking information from the temperature data transmitting unit 32 through the window 49. This cooking data refers to the recognition result of cooking information, and is generated by envelope detection of the light reception result of infrared cooking information as shown in FIG. As shown in FIG. 4, the infrared light receiving circuit 48 is connected to the interrupt terminal INT of the control circuit 42, and the control circuit 42 activates an interrupt program based on detecting the cooking data header S1. The remaining battery level data S2, the pan data S3, and the temperature data S4 following the header S1 in the interruption program are stored in the RAM as cooking information in time series. The infrared light receiving circuit 48 corresponds to a receiving unit having one receiving unit and a light receiving unit having one light receiving unit.

  As shown in FIG. 3, the control circuit 42 is electrically connected with an LED 50 corresponding to a notification unit. This LED 50 is fixed to the operation panel 10 as shown in FIG. 1, and the CPU of the control circuit 42 continues the LED 50 when it detects the consumption “1” of the pan-side power supply 30 as the battery remaining amount data S2. The user is informed of the consumption and replacement of the pan-side power supply 30 based on the fact that light is emitted automatically.

A main program for automatic kettle cooking is recorded in the ROM of the control circuit 42, and when the CPU of the control circuit 42 detects the on operation of the automatic kettle key 13, the main program for automatic kettle cooking is started. Control the cooking content based on. Hereinafter, the main program for automatic kettle cooking will be described.
When the control circuit 42 detects that the automatic water heating key 13 is turned on, the control circuit 42 clears the RAM in step S1 of FIG. 8 and resets the cooking flag to the temperature raising process. In step S2, the heating power is set to a rated value of 3 kW, and automatic water heating cooking is started with a strong heating power of 3 kW. This heating power is adjusted based on controlling the energization time per unit time of the left coil 19 by the on / off ratio of the inverter circuit 27. When the control circuit 42 starts the automatic water cooking with a high power of 3 kW, The process proceeds to step S3.

  When the control circuit 42 proceeds to step S3, it determines the setting state of the cooking flag. This cooking flag is set in the temperature raising process based on the start of the automatic water heating cooking, and is set in the heat retaining process based on the end of the temperature raising process, and the control circuit 42 sets the cooking flag in the temperature rising process in step S3. When it is detected that the cooking flag is set, the temperature increasing process of step S4 is executed, and when it is detected that the cooking flag is set to the temperature maintaining process in step S3, the temperature maintaining process of step S5 is executed.

When the control circuit 42 shifts to the temperature raising process of step S4, it determines the presence or absence of infrared cooking information in step S11 of FIG. For example, since there is no infrared cooking information in the RAM when the cooking utensil 6 is not in use, the control circuit 42 recognizes that a general-purpose cooking utensil is being used in step S11 and proceeds to step S12 to perform general-purpose kettle cooking. I do.
1. General-purpose kettle cooking When the control circuit 42 proceeds to step S12, the control circuit 42 detects an indirect surface temperature Ts of the cooking utensil based on acquiring an output signal from the left internal temperature sensor 22 by wire. The detection process of the surface temperature Ts in step S12 is performed every set period (specifically, every 1 sec), and the control circuit 42 displays the detection result of the surface temperature Ts when the surface temperature Ts is detected in step S12. The wired cooking information is stored in the RAM in time series, and the process proceeds to step S13.

In step S13, the control circuit 42 detects the latest storage result of the surface temperature Ts from the RAM and compares it with the determination value Th recorded in advance in the ROM. If “Ts ≦ Th (specifically, 80 ° C.)” is detected, the process proceeds to step S14, and the latest storage result of the surface temperature Ts is stored in the ROM in advance as a determination value Tl (specifically, 50). Compare with ° C).
When detecting “Tl ≦ Ts” in step S14, the control circuit 42 sets the heating power to 2 kW in step S15. That is, when it is detected that the surface temperature Ts of the cooking utensil has risen to the determination value Tl based on the output signal from the left internal temperature sensor 22, the heating power is lowered from 3 kW to 2 kW, and the cooking utensil is heated by 2 kW. Heated continuously.

When the control circuit 42 detects “Ts> Th” in step S13, the left coil 19 is operated with a low heating power of 1 kW in step S16. That is, when it is detected that the surface temperature Ts of the cooking utensil is raised to the determination value Th (> Tl) based on the output signal from the left internal temperature sensor 22, the heating power is lowered from 2 kW to 1 kW, and the cooking utensil is Heated continuously with 1 kW of thermal power.
When the heating power is weakly set in step S16, the control circuit 42 calculates the temperature change rate ΔTs in step S17. This temperature change rate ΔTs corresponds to the temperature rise per unit time of the cooking utensil, and the control circuit 42 detects the latest surface temperature Ts and the previous surface temperature Ts from the RAM, and the latest surface temperature Ts. The difference between the detection result and the previous detection result is calculated as the temperature change rate ΔTs.

After calculating the temperature change rate ΔTs in step S17, the control circuit 42 compares the calculation result of the temperature change rate ΔTs with a determination value ΔT recorded in advance in the ROM in step S18. Here, when “ΔTs <ΔT” is detected, it is determined that the cooking utensil has reached the recognition temperature Tw, and the heat retention process is set in the cooking flag in step S19. That is, as shown in FIG. 10, the general-purpose automatic kettle cooking is based on changing the heating power stepwise from strong, medium, and weak based on the output signal from the left internal temperature sensor 22 to the heating state of the cooking utensil. Is gradually reduced, and the process ends based on a decrease in the temperature rise ΔTs of the cooking utensil.
2. About dedicated hot water cooking When the control circuit 42 detects that the wireless cooking information is stored in the RAM in step S11 of FIG. 9, the process proceeds to step S20. The wireless cooking information is transmitted by the temperature data transmission unit 32 of the cooking utensil 6 by infrared rays for each set period, and is stored by the control circuit 42 by external interrupt processing. That is, when wireless cooking information is stored in the RAM, the use of the dedicated cooking utensil 6 is recognized, and automatic hot water cooking in a mode corresponding to the dedicated cooking utensil 6 is performed.

  When the control circuit 42 proceeds to step S20, the battery remaining data S2 of the latest wireless cooking information is detected from the RAM. Here, when it is detected that the battery remaining amount data S2 is “0”, it is determined that the pan-side power supply 30 is at a normal level, and the LED 50 is turned off in step S21. Further, when it is detected that the battery remaining amount data S2 is “1”, it is determined that the pan-side power supply 30 is abnormally lowered, the process proceeds to step S22, and the battery is supplied to the user based on turning on the LED 50. Notify when cut. That is, the battery exhaustion display is turned on not only when cooking is started while the pan-side power supply 30 is abnormally lowered, but also when the pan-side power supply 30 is abnormally dropped during cooking.

  When the control circuit 42 proceeds to step S23, the temperature data S4 of the latest wireless cooking information is detected from the RAM. The temperature data S4 is the direct surface temperature To of the cooking utensil 6 transmitted by infrared rays from the temperature data transmission unit 32. When the control circuit 42 detects the surface temperature To in step S23, the temperature change rate ΔTo in step S24. Is calculated. This temperature change rate ΔTo corresponds to the temperature rise per unit time of the cooking utensil 6, and the control circuit 42 detects the surface temperature To of the previous wireless cooking information from the RAM, and detects the latest surface temperature To. The difference between the result and the previous detection result is calculated as the temperature change rate ΔTo.

  When calculating the temperature change rate ΔTo in step S24, the control circuit 42 compares the calculation result of the temperature change rate ΔTo with a determination value ΔT recorded in advance in the ROM in step S25. Here, when “ΔTo <ΔT” is detected, it is determined that the dedicated cooking utensil 6 has reached the recognition temperature Tw by boiling water, and the heat retention process is set in the cooking flag in step S19. That is, as shown in FIG. 11, the dedicated hot water cooking is to detect the infrared transmission result of the direct surface temperature To while heating the cooking utensil 6 with a strong heating power of 3 kW. The process ends based on the decrease in ΔTo.

  When the control circuit 42 detects that the cooking flag is set to the heat retention process in step S3 of FIG. 8, the control circuit 42 initializes the thermal power to the heat retention value (<1 kW) in the heat retention process of step S5. When the wireless cooking information is present, the heating power is adjusted in the vicinity of the heat insulation value so that the wireless surface temperature To is maintained at the recognition temperature Tw, and when the wireless cooking information is not present, the wired surface temperature Ts is heated to the recognition temperature Tw. Adjust the thermal power around the heat insulation value so that it is maintained.

According to the first embodiment, the following effects are obtained.
An external temperature sensor 29 is provided in the cooking utensil 6 which is not affected by the magnetic field from the left coil 19 and does not include the top plate 3 which is a product of the temperature gradient, and cooking information corresponding to the detection result of the external temperature sensor 29 is transmitted wirelessly. Since the cooking content is controlled based on this, the actual temperature of the cooking utensil 6 can be detected with high accuracy without performing stepwise lowering control of the heating power. For this reason, since the cooking utensil 6 can be continuously heated with a strong heating power, the cooked product can be finished in a desired state in a short time.

  A plurality of infrared LEDs 39 are mounted on the cooking utensil 6, and the infrared light receiving circuit 48 in the cabinet 2 is placed in one of the transmission ranges of the plurality of infrared LEDs 39 according to the mounting angle of the cooking utensil 6. For this reason, since it becomes unnecessary to pay attention to the mounting angle of the cooking utensil 6 when placing the cooking utensil 6 on the left mark 4, the usability is improved. And the sum total of the transmission area | region of several infrared LED39 was set to 360 degrees or more in the mounting state of the cooking appliance 6. FIG. For this reason, the infrared light receiving circuit 48 can be accommodated in the transmission area regardless of the angle at which the cooking utensil 6 is placed on the left mark 4, so there is no need to pay any attention to the mounting angle of the cooking utensil 6.

The plurality of infrared LEDs 39 were sequentially driven with a time difference without simultaneously driving, and the transmission timing of cooking information from the plurality of infrared LEDs 39 was shifted. For this reason, since the electric energy used is reduced, the battery life of the pan-side power supply 30 is lengthened.
In the first embodiment, the cooking utensil 6 and the cooking device are provided with a plurality of infrared LEDs 39 and one infrared light receiving circuit 48. However, the present invention is not limited to this. For example, one infrared LED 39 and a plurality of infrared light receiving circuits 48 are provided. An infrared light receiving circuit may be provided. A specific example of the configuration will be described below with reference to the drawings.
<Example 2>
As shown in FIG. 14, the cabinet 2 houses a first infrared light receiving circuit 51, a second infrared light receiving circuit 52, a third infrared light receiving circuit 53, and a fourth infrared light receiving circuit 54. . The first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 are formed by modularizing an infrared sensor and a signal output circuit. The outer periphery of the left mark 4 is concentrically with the left mark 4 in the circumferential direction and the like. Arranged at angular intervals. These first infrared light receiving circuit 51 to fourth infrared light receiving circuit 54 have cooking information transmitted from one infrared LED 39 as a common reception target, and cooking information transmitted from one infrared LED 39. Is received through the upper window 49. The first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 correspond to a receiving unit that constitutes a receiving means.

  The first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 output pulse-shaped envelope signals having different voltage levels based on receiving cooking information from the cooking utensil 6, specifically, The output signal of the first infrared light receiving circuit 51 and the output signal of the second infrared light receiving circuit 52 are set to 5V and 4.5V, and the output signal of the third infrared light receiving circuit 53 and the output signal of the fourth infrared light receiving circuit 54 are set. The output signal is set to 4V and 3.5V.

  The first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 are electrically connected to the interrupt terminal INT of the control circuit 42 via the selection circuit 55 as shown in FIG. The selection circuit 55 selectively transmits the output signal from the first infrared light receiving circuit 51 to the output signal from the fourth infrared light receiving circuit 54 having the highest voltage level to the interrupt terminal INT of the control circuit 42. The control circuit 42 executes the processing operations shown in FIGS. 8 and 9 based on the output signal from the selection circuit 55. The selection circuit 55 corresponds to selection means, and includes a first Schottky barrier diode 56 to a fourth Schottky barrier diode 59 and a first current limiting resistor 60 to a fourth current resistor 63. Yes. In other words, the selection circuit 55 generates a reverse bias by the output signal at the highest voltage level and blocks the remaining output signals.

  As shown in FIG. 14, a light shielding plate 64 corresponding to a shielding member is housed in the cabinet 2 and is located at the right end of the first infrared light receiving circuit 51 to the right end of the fourth infrared light receiving circuit 54. Yes. Each of the light shielding plates 64 has a vertical plate shape that is colored and opaque, and shields infrared rays projected from the cooking utensil 6 when the cooking utensil 6 is placed on the right mark 5. The first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 are prevented from receiving cooking information from the cooking utensil 6 on the right mark 5.

The second embodiment has the following effects.
Since the first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 are provided on the cooking device side, the wireless cooking information from the cooking utensil 6 is transmitted to the first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54. Among them, the one corresponding to the mounting angle of the cooking utensil 6 can be selectively received. For this reason, since it becomes unnecessary to pay attention to the mounting angle of the cooking utensil 6 when placing the cooking utensil 6 on the left mark 4, the usability is improved.

One was selected from the reception result of the first infrared light receiving circuit 51 to the reception result of the fourth infrared light receiving circuit 54. This eliminates the need for the control circuit 42 to have an interrupt terminal for each of the first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54, thereby reducing the processing burden on the control circuit 42.
A light shielding plate 64 is disposed from the right end of the first infrared light receiving circuit 51 to the right end of the fourth infrared light receiving circuit 54. For this reason, the first infrared light receiving circuit 51 to the fourth infrared light receiving circuit 54 do not receive cooking information from the cooking utensil 6 on the right mark 5, for example, on the left mark 4 and the right mark 5. When a general-purpose cooking utensil and a dedicated cooking utensil 6 are placed and cooking is performed simultaneously, the general-purpose cooking utensil is prevented from being erroneously controlled based on cooking information from the dedicated cooking utensil 6.

In the said 1st-2nd Example, although it was set as the structure which transmits / receives cooking information by infrared rays, it is not limited to this, For example, it is good also as a structure which transmits / receives by magnetism.
In the first to second embodiments, the cooking information is used for automatic kettle cooking. However, the cooking information is not limited to this, and the cooking utensil 6 is heated to a set temperature, such as tempura cooking, hot water cooking, and fried food cooking. Can be used for automatic cooking.

  In the said 1st-2nd Example, although it was set as the structure which detects the surface temperature To of the cooking utensil 6 with the external temperature sensor 29, it is not limited to this, For example, the temperature of the foodstuff in the cooking utensil 6 May be detected, and the temperature of the food may be transmitted as cooking information. In this case, the external temperature sensor 29 may be fixed to the inner peripheral surface of the container portion 8.

The figure which shows 1st Example of this invention (The perspective view which shows the external appearance of a cooking heater) The figure which shows the exclusive cooking utensil in the state where the electrical component case is broken Block diagram showing electrical configuration of inverter circuit unit and inverter control unit Block diagram showing electrical configuration of temperature data transmitter The figure which shows a dedicated cooking appliance in the removal state of an electrical component case (a is a top view, b is a side view) The figure which shows the relationship between the detection voltage of control circuit and recognition temperature (A) is a figure which shows the drive signal of infrared LED, (b) is a figure which shows the content of the wireless cooking information projected from infrared LED, (c) is a detection signal of the wireless cooking information output from an infrared light receiving circuit. Figure showing Flow chart showing control contents of control circuit Flow chart showing control contents of control circuit The figure which shows the contents of the automatic kettle cooking when the general-purpose cooking utensil which does not have a wireless communication function is used The figure which shows the automatic hot water cooking content at the time of using the dedicated cooking appliance which has a wireless communication function The figure which shows the arrangement | positioning relationship of infrared LED and an infrared light-receiving circuit (a is a top view, b is a side view) The figure which shows the relationship between the mounting angle of a cooking appliance, and the drive current of infrared LED. FIG. 5 (a) equivalent view showing a second embodiment of the present invention. Diagram showing selection circuit

Explanation of symbols

  6 is a cooking appliance, 8 is a container part, 19 is a left coil (heating means), 29 is an external temperature sensor (temperature detection means), 39 is an infrared LED (transmission part), 40 is a control circuit (transmission control means), 42 Is a control circuit (heating control means), 51 to 54 are infrared light receiving circuits (reception units), 55 is a selection circuit (selection means), 56 to 59 are Schottky barrier diodes, and 64 is a light shielding plate (shielding member). Yes.

Claims (9)

Heating means for heating the cooking utensil;
A receiving means capable of receiving the temperature information of the cooking utensil transmitted from outside or the temperature information of the food in the cooking utensil;
Heating control means for driving and controlling the heating means based on the reception result of the receiving means,
The said receiving means is comprised from the some receiving part with which the receiving object of temperature information is common, The heating cooker characterized by the above-mentioned. Heating means for heating the cooking utensil;
Receiving means capable of receiving the temperature information of one of the cooking utensils or the temperature information of the cooked food in the cooking utensil transmitted wirelessly from outside;
Heating control means for driving and controlling the heating means based on the reception result of the receiving means,
The said receiving means is comprised from several receiving part, and is arrange | positioned so that the temperature information of one of the said cooking utensils or the temperature information of the cooking food in the said cooking utensil is received, The cooking device characterized by the above-mentioned. . Selecting means for selecting one of the reception results of the plurality of receiving units;
The cooking device according to claim 1, wherein the heating control unit drives and controls the heating unit based on a selection result of the selection unit. The plurality of receiving units have different output voltage levels of reception results,
The cooking device according to claim 3, wherein the selection unit includes a Schottky barrier diode that selects the one having the highest voltage level from the reception results of the plurality of reception units.   The cooking device according to any one of claims 1 to 4, further comprising a shielding member that shields temperature information transmitted from an irregular direction. A container part into which the food is charged;
Temperature detecting means for detecting the temperature of the container part or the temperature of the food in the container part;
Transmission means for wirelessly transmitting temperature information according to the detection result of the temperature detection means,
The said transmission means is comprised from the some transmission part with which the transmission object of temperature information is common, The cooking appliance characterized by the above-mentioned.   The cooker according to claim 6, wherein the plurality of transmission units are arranged in a circular shape at the same height.   The cooking device according to any one of claims 6 to 7, wherein the plurality of transmission units form a transmission region that is connected in a ring shape with the container unit set in a heating cooker. The cooking utensil according to any one of claims 6 to 8, further comprising transmission control means for transmitting temperature information at different timings based on sequentially driving the plurality of transmission units.

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