JP7142321B2 - heating cooker - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a heating cooker, and more particularly to a heating cooker that detects the temperature of an object to be heated.

Conventionally, the heating power of a heating cooker is adjusted based on the temperature of the bottom of the pot. The temperature of the bottom of the pan is detected by a temperature sensing element located below the plate. However, when there is a temperature difference between the temperature inside the pan and the temperature at the bottom of the pan, a delay in transmission of the detected temperature occurs. As a result, for example, when the temperature of the pot drops by putting food into the pot, it takes time to return to the original temperature, and when the temperature is high, burning may occur, and the heat control may become unstable. be.

Therefore, for example, in the heating cooker disclosed in Patent Document 1, a detachable temperature detection device is arranged in the duct. The temperature detection device can communicate with the heating cooker and detects the temperature of the object to be heated from above.

The heating cooker of Patent Document 1 adjusts the installation position of the temperature detection device using an infrared element mounted on the temperature detection element arranged above. The infrared rays emitted from the infrared element are received by a plurality of communication units arranged below the plate of the heating cooker. The position of the temperature detection element is calculated from the difference in the amount of light received by each communication unit.

JP 2015-106462 A

However, the temperature sensing module may be attached to a hood that is not dedicated to it. Because of the wide variety of shapes of attached hoods, it can be difficult to wire-power the temperature sensing module. In this case, the temperature detection module is driven by, for example, a battery, but the battery needs to be replaced, increasing the burden on the user.

Therefore, an object of the present disclosure is to solve the above problems, and to provide a heating cooker in which the power consumption of a temperature detection module that detects the temperature distribution on the top plate of the heating cooker from above is reduced. be.

department to solve problems

In order to achieve the above object, a heating cooker according to an aspect of the present disclosure includes a top plate on which a container containing food to be cooked is placed, a heating unit that heats the container, and a heating output of the heating unit. a main body comprising a heating controller for controlling;
a temperature detection module including a temperature detection unit that periodically detects the temperature distribution on the top plate from above the top plate;
The main body includes a first communication unit that wirelessly communicates with the temperature detection module,
The temperature detection module includes a second communication unit that wirelessly communicates with the main body,
Temperature information detected by the temperature detection unit is transmitted from the second communication unit to the first communication unit,
The heating control unit controls the heating output according to the temperature information sent,
A detection cycle setting unit is provided for setting a cycle of temperature detection by the temperature detection unit in accordance with temperature information detected by the temperature detection unit.

It is possible to provide a cooker in which the power consumption of the temperature detection module that detects the temperature distribution on the top plate of the cooker from above is reduced.

1 is a perspective view of a heating cooker according to Embodiment 1 top view of heating cooker Explanatory drawing which shows roughly the installation state of a heating cooker FIG. 2 is a block diagram showing the control system of the heating cooker according to Embodiment 1. FIG. Flowchart showing the flow of changing the detection cycle Explanatory diagram showing the timing of changing the detection cycle Explanatory view schematically showing the installation state of a heating cooker having a temperature detection part in the main body Graph diagram showing an example of temperature change of the object to be heated

According to one aspect of the present disclosure, a main body including a top plate on which a container containing food to be cooked is placed, a heating unit that heats the container, and a heating control unit that controls the heating output of the heating unit and a temperature detection module including a temperature detection unit that periodically detects the temperature distribution on the top plate from above the top plate, wherein the main body is a first communication unit that performs wireless communication with the temperature detection module. wherein the temperature detection module includes a second communication unit that performs wireless communication with the main body, temperature information detected by the temperature detection unit is transmitted from the second communication unit to the first communication unit, The heating control unit controls the heating output in accordance with the temperature information sent thereto, and sets a detection period for setting the period of temperature detection by the temperature detection unit in accordance with the temperature information detected by the temperature detection unit. have a department.

Further, the detection cycle setting unit may set the cycle of temperature detection according to the absolute value of the detected temperature.

Further, the detection period setting section may shorten the temperature detection period when the absolute value of the temperature detected by the temperature detection section becomes higher than a predetermined value.

Further, the detection cycle setting section may set the cycle of temperature detection according to a variation value of the detected temperature per unit time.

Further, the detection period setting section may shorten the temperature detection period when a fluctuation value per unit time of the temperature detected by the temperature detection section exceeds a predetermined fluctuation value.

Further, the detection cycle setting section may change the temperature detection cycle according to an instruction from the main body.

Further, the apparatus may further comprise a human body detection section for detecting presence of a human body, and the detection cycle setting section may change a cycle of temperature detection when the human body detection section detects the human body.

Further, the cycle of temperature detection by the temperature detection unit may be shorter after being changed than the cycle before being changed by the detection cycle setting unit.

Also, the temperature detection module may include a power storage unit, and the power storage unit may supply power to the temperature detection unit and the second communication unit.

Further, the temperature detection section may have a plurality of temperature detection elements arranged in an array.

Further, the heating unit may have a heating coil that generates an induction magnetic field to heat the container, and the heating control unit may heat the container by supplying a high-frequency current to the heating coil.

(Embodiment 1)
A heating cooker according to Embodiment 1 of the present disclosure will be described below with reference to FIGS. 1 to 4. FIG. FIG. 1 is a perspective view of a heating cooker 1 according to Embodiment 1 of the present disclosure. FIG. 2 is a top view of the heating cooker 1 according to Embodiment 1. FIG. FIG. 3 is a schematic diagram showing an installation state of the heating cooker. FIG. 4 is a block diagram showing the control system of the heating cooker 1. As shown in FIG. In each figure, the X-axis direction indicates the longitudinal direction of the heating cooker, the Y-axis direction indicates the front-rear direction, and the Z-axis direction indicates the height direction. Also, the positive direction of the X-axis is defined as the right direction, and the negative direction is defined as the left direction.

As shown in FIG. 1, the heating cooker 1 has a main body 3 and a top plate 5 as an upper portion of the main body 3 on which a container Cr is placed. An object to be heated Tc as a cooking object such as stew is accommodated in the container Cr, for example.

Further, in the case of Embodiment 1, the heating cooker 1 is an induction heating cooker, and as shown in FIG. Heating coils 7A, 7B, and 7C are arranged as a heating portion of the vessel 1 . Ring-shaped markers 8A, 8B, 8C indicating container placement areas are printed on the top plate 5 above the corresponding heating coils 7A, 7B, 7C, respectively. Heating coils 7A-7C generate an induced magnetic field to heat container Cr. A coil control unit 10, which is a heating control unit, supplies high-frequency current to the heating coils 7A to 7C to heat the container Cr. Further, the coil control unit 10 controls the amount of heating from the heating coils 7A to 7C by controlling the amount of current flowing through the heating coils 7A to 7C.

When viewed from above, ring-shaped light-emitting portions 6A, 6B, and 6C are arranged on the top plate 5 outside the heating coils 7A, 7B, and 7C, respectively. The light-emitting portions 6A, 6B, 6C emit light, for example, when current is flowing through the corresponding heating coils 7A, 7B, 7C. The light emitting units 6A to 6C each have, for example, an LED light emitting board.

A plurality of operation input sections 9A, 9B, and 9C for the user to operate the heating coils 7A to 7C are arranged on the front side of the top plate 5 of the heating cooker 1. As shown in FIG. The operation input units 9A to 9C may be touch keys or touch panels, for example. Further, the operation input section 9A and the heating coil 7A, the operation input section 9B and the heating coil 7B, and the operation input section 9C and the heating coil 7C correspond to each other. The coil control unit 10 controls the start or stop of heating of the heating coil 7A according to the operation instruction of the operation input unit 9A. Further, the coil control unit 10 adjusts the heating level of the heating coil 7A to four levels, for example, according to the operation instruction of the operation input unit 9A.

The main body 3 also includes a notification unit 4 for notifying information about heating of the heating coils 7A to 7C. The notification unit 4 has a display unit 11 and an audio output unit 15 . A display unit 11 is arranged on the front side of the top plate 5 of the heating cooker 1 and displays the heating levels of the heating coils 7A to 7C. The display unit 11 is, for example, a monochrome liquid crystal panel having a band shape extending in the longitudinal direction of the top plate 5, but may be a color liquid crystal panel. Also, the voice output unit 15 is arranged on the front side of the heating cooker 1 and outputs voice guidance to the user. The audio output unit 15 is, for example, a speaker.

A setting unit 13 is provided on the front side of the main body 3 of the heating cooker 1 in order to set the heating by the heating coils 7A to 7C in detail. The setting unit 13 can be inserted into and removed from the main body 3, and has setting keys 13a for setting details of heating by the heating coils 7A to 7C, setting contents, detailed states of the heating coils 7A to 7C, and the like. and a setting display section 13b for displaying. The setting unit 13 sets the heating temperature, heating time, timer, and the like of the heating coils 7A to 7C.

A range hood 17 is installed above the heating cooker 1 . The range hood 17 draws in the air above the heating cooker 1 through a hood portion 17a provided at the bottom, and exhausts it from an outlet communicating with the outside.

The heating cooker 1 also includes a temperature detection module 19 that detects the temperature of the object to be heated Tc on the top plate 5 from above. The temperature detection module 19 is arranged at a position away from the top plate 5, and is detachably arranged at the center of the hood portion 17a of the range hood 17, for example. Specifically, the temperature detection module 19 is attached with a magnet, an adhesive material, a clip, or the like.

For wireless communication between the main body 3 and the temperature detection module 19, the main body 3 has a first communication section 21 and the temperature detection module 19 has a second communication section 23, respectively. Temperature information detected by the temperature detection module 19 is transmitted from the second communication section 23 and received by the main body 3 by the first communication section 21 . The first communication unit 21 and the second communication unit 23 each have an antenna, and are wirelessly connected by wireless communication such as Wi-Fi (registered trademark), Bluetooth (registered trademark), or BLE (Bluetooth Low Energy). ing. Note that the main body 3 and the temperature detection module 19 may be connected by a wire instead of having the first communication section 21 and the second communication section 23 .

The heating cooker 1 includes a control section 25 and a storage section 27 inside the main body 3 . The control unit 25 is a processing device such as a CPU or a microprocessor, and is configured to perform various functions by executing programs stored in a storage unit 27 such as ROM, RAM, hard disk, and SSD. ing.

The control unit 25 has a temperature information processing unit 25a. The temperature information processing unit 25 a determines the state of the object to be heated Tc by image processing based on the temperature information of the thermal image transmitted from the temperature detection module 19 . As the state of the object to be heated Tc, there are a normal state, a boiling state, a boiling over precursor state, and a boiling over state. When the temperature information processing section 25a determines, for example, a boiling over sign state as the state of the object to be heated Tc, the coil control section 10 instructs to stop the heating control of the heating coils 7A to 7C. As a result, the coil control unit 10 can stop the heating from the corresponding heating coil of the heating coils 7A to 7C and prevent the occurrence of boiling over.

The temperature detection module 19 includes a temperature detection section 29 , a control section 31 , a storage section 33 and a power storage section 35 . The temperature detection unit 29 has a temperature sensor 29a that detects the temperature distribution on the top plate 5 within the viewing range from above, and an amplification unit 29b that amplifies the detection signal of the temperature sensor 29a. The temperature sensor 29a is, for example, an infrared sensor or a thermal image camera. The thermal image detected by the temperature detector 29 contains information on the temperature distribution on the top plate 5 . The temperature sensor 29a can photograph the entire top plate 5 from above if it is set in an appropriate photographing direction. In addition to the range hood 17, the temperature detection module 19 may be arranged on a ventilation fan, a duct, a ceiling, or a wall.

The distance from the temperature sensor 29a to the top plate 5 is, for example, 600 mm or more and 2000 mm or less. The temperature sensor 29a has 64 or more pixels arranged on a plane. The temperature sensor 29a in Embodiment 1 also has 64 pixels of 8 vertical pixels×8 horizontal pixels, as an example.

The control unit 31 is a processing device such as a CPU or a microprocessor, and is configured to perform various functions by executing programs stored in a storage unit 33 such as ROM, RAM, hard disk, and SSD. ing.

The control unit 31 includes a detection cycle setting unit 31a that sets the cycle of temperature detection in the temperature detection unit 29, and determines whether the temperature information acquired by the temperature detection unit 29 is equal to or higher than a predetermined threshold. and a detected temperature determination unit 31c. The detection cycle setting unit 31a sets the detection cycle according to the temperature information detected by the temperature detection unit 29. FIG. For example, if the object to be heated Tc is water and the temperature is less than 60° C., the possibility of boiling over is low, so the temperature information detection cycle is set long (eg, 3 to 5 seconds). Further, for example, when the temperature of the object to be heated Tc reaches 90° C. or higher, the detection cycle is reset to 1 sec or less, for example, because the time until boiling occurs and boiling over occurs is relatively short. Thus, the detection cycle is set according to the temperature state of the object to be heated Tc.

The power storage unit 35 supplies power to the temperature detection unit 29, the control unit 31, the storage unit 33, and the second communication unit 23, respectively. The power storage unit 35 is, for example, a battery.

Next, referring to FIG. 5, the flow of changing the temperature detection period will be described. First, when a heating instruction to any one of the heating coils 7A to 7C is input from any one of the operation input sections 9A to 9C of the main body 3, the control section 25 sends the control section 31 of the temperature detection module 19 to obtain temperature information. a request is made. At this time, the detection cycle setting unit 31a sets a detection cycle of 3 to 5 seconds because the heating coil is immediately energized. Thereby, the temperature sensor 29a acquires the temperature information on the top plate 5 in step S11. The amplifier 29b amplifies the acquired temperature information after A/D converting it at the set detection cycle.

In step S<b>13 , the acquired temperature information is transmitted from the second communication section 23 to the first communication section 21 and received by the temperature information processing section 25 a of the control section 25 . The temperature information processing unit 25a determines the state of the object to be heated Tc based on the received temperature information.

In step S14, the detected temperature determination unit 31c of the control unit 31 determines whether the absolute value of the detected temperature of the specific area corresponding to the area of the heating coils 7A to 7C in the temperature information is equal to or higher than a predetermined threshold. judge. For example, as shown in FIG. 6, if the absolute value of the detected temperature TA is less than the threshold value Tp1, the detection cycle is not changed as in step 14, and the process returns to step S11 after the detection cycle has elapsed. .

If the absolute value of the detected temperature TA is equal to or greater than the threshold value Tp1 as in Yes in step S14, the detection cycle setting unit 31a resets the detection cycle. For example, the detection cycle setting unit 31a shortens the detection cycle. The shortened detection period is, for example, 1 sec or less. Note that a plurality of thresholds may be prepared to shorten the detection cycle step by step.

Heating cooker 1 of Embodiment 1 includes main body 3 and temperature detection module 19 . The main body 3 includes a top plate 5 on which a container Cr containing an object to be heated Tc, which is an object to be cooked, is placed, heating coils 7A to 7C for heating the container Cr, and coils for controlling the heating outputs of the heating coils 7A to 7C. and a control unit 10 . The temperature detection module 19 includes a temperature detection section 29 that periodically detects the temperature distribution on the top plate 5 from above the top plate 5 . The main body 3 further includes a first communication section 21 that wirelessly communicates with the temperature detection module 19 . The temperature detection module 19 includes a second communication section 23 that wirelessly communicates with the main body 3 . Temperature information detected by the temperature detector 29 is transmitted from the second communication unit 23 to the first communication unit 21 . The coil control unit 10 controls the heating output according to the sent temperature information. A detection cycle setting unit 31 a is provided for setting a cycle of temperature detection by the temperature detection unit 29 according to temperature information detected by the temperature detection unit 29 . With these configurations, the cycle of temperature detection can be set according to the heating state of the object to be heated, so the power consumption of the temperature detection module 19 can be reduced. For example, when the temperature of the object to be heated is low, by setting the temperature detection period longer, it is possible to reduce the number of times the temperature detection module 19 acquires and amplifies temperature information and transmits the temperature information by wireless communication. Therefore, the power consumption of the temperature detection module 19 can be reduced.

Further, instead of changing the temperature detection cycle according to the absolute value of the detected temperature, the detection cycle setting unit 31a may change the temperature detection cycle according to the fluctuation value of the detected temperature per unit time. For example, the period of temperature detection may be changed by the slope Tp2 of the variation curve of the detected temperature TA shown in FIG. Further, the detection cycle setting unit 31a may shorten the cycle of temperature detection when the variation value per unit time exceeds a predetermined variation value.

Further, the detection period setting section 31 a may change the period of temperature detection according to an instruction from the control section 25 of the main body 3 . For example, the control unit 25 may instruct the temperature detection module 19 to set the period according to an input instruction from the operation input units 9A to 9C or the setting key 13a by the user. At this time, the detection cycle setting unit 31a newly sets, for example, a cycle shorter than the cycle before the change, so that the cycle in which the temperature detection unit 29 detects the temperature is longer than the cycle before the change by the detection cycle setting unit 31a. also becomes shorter after the change. Therefore, the temperature condition on the top plate 5 can be recognized in the short term.

The heating cooker 1 may include a human body detection unit that detects the presence of a human body, and the detection cycle setting unit 31a may change the cycle of temperature detection when the human body detection unit detects the human body. The human body detection unit may be configured as a proximity sensor on the front side of the main body 3 or may be configured as the temperature information processing unit 25 a of the control unit 25 . The temperature information processing unit 25a may detect, as a human body, an area with time-series movement in the temperature range of 35° C. in the temperature information sent from the temperature detection module 19 . When the human body detection unit detects the presence of a human body near the main body 3, the control unit 25 instructs the control unit 31 of the temperature detection module 19 to further delay the cycle of temperature detection when the temperature of the object to be heated Tc is low. do. Thereby, the power consumption of the temperature detection module 19 can be further reduced. Further, when the temperature of the object to be heated Tc is high and the presence of a human body in the vicinity of the main body 3 is detected by the human body detection section, the control section 25 instructs the control section 31 of the temperature detection module 19 to further shorten the temperature detection cycle. You may give instructions to

The present disclosure is not limited to the above embodiment, and can be modified as follows.

(1) In the above embodiment, the container Cr containing the object to be heated Tc is detected from above by the temperature detection module 19, but the present invention is not limited to this. The temperature of the container Cr may be detected not only from above but also from below the top plate 5 . For example, as shown in FIG. 7, a temperature sensor 61 is arranged below the top plate 5 to detect the temperature of the bottom of the container Cr placed on the heating coils 7A to 7C. The temperature sensor 61 may be arranged above each of the heating coils 7A to 7C, or only one may be arranged in the central portion of the top plate 5. FIG.

When the object to be heated Tc housed in the container Cr has a high viscosity, for example, when the object to be heated Tc is corn soup, a temperature difference occurs between the upper portion and the lower portion of the object to be heated Tc inside the container Cr. FIG. 8 shows, as an example, the temperature curve TN of the object to be heated Tc in the container Cr detected from above by the temperature sensor 29a of the temperature detection module 19, and the temperature curve TN of the container Cr detected from below by the temperature sensor 61 of the main body 3. The bottom temperature curve TB is shown.

When the temperature difference between the bottom of the container Cr and the temperature of the upper portion of the object to be heated Tc is large, even if the absolute temperature of the detected temperature is 100° C. or less, boiling over may occur. Therefore, even when the temperature detected by the temperature detection unit 29 is low, if the temperature difference from the temperature detected by the temperature sensor 61 exceeds a predetermined threshold, the control unit 25 of the main body 3 controls the temperature detection module 19. The detection cycle setting unit 31a is instructed to set a cycle shorter than usual.

As a result, even if the object to be heated Tc is highly viscous, when the temperature difference between the bottom temperature of the container Cr and the temperature of the upper part of the object to be heated Tc is large, the cycle of temperature detection from above is shortened. Therefore, the temperature information processing section 25a can detect a sign of boiling over and prevent boiling over.

(2) In the above embodiment, the heating cooker 1 is an induction heating cooker that induction-heats the container Cr using the heating coils 7A to 7C, but is not limited to this. For example, the heating cooker 1 may be a gas cooker. In the case of the gas cooker, the container Cr is placed on a trivet serving as a container placing portion provided on the top plate 5 of the main body 3 and heated from below by a gas burner serving as a heating portion.

By appropriately combining any of the various embodiments and modifications described above, the respective effects can be obtained.

Although the present disclosure has been fully described in connection with preferred embodiments and with reference to the accompanying drawings, various variations and modifications will become apparent to those skilled in the art. Such variations and modifications are to be included therein insofar as they do not depart from the scope of the present disclosure by the appended claims. Also, combinations and order changes of elements in each embodiment can be implemented without departing from the scope and spirit of the present disclosure.

1 heating cooker 3 main body 4 reporting unit 5 top plate 6A, 6B, 6C light emitting unit 7A, 7B, 7C heating coil 8A, 8B, 8C marker 9A, 9B, 9C operation input unit 10 coil control unit 11 display unit 13 setting unit 13a setting key 13b setting display section 15 audio output section 17 range hood 17a hood portion 19 temperature detection module 20 temperature detection section 20a temperature sensor 20b amplification section 21 first communication section
23 second communication unit
25 control unit 25a temperature information processing unit 27 storage unit 29 temperature detection unit 29a temperature sensor 29b amplification unit 31 control unit 31a detection cycle setting unit 31c detection temperature determination unit 33 storage unit 35 power storage unit 61 temperature sensor Cr container Tc object to be heated Tp1 Threshold TA Detection temperature TB, TN Temperature curve

Claims (11)

a main body comprising a top plate on which a container containing food to be cooked is placed, a heating unit for heating the container, and a heating control unit for controlling the heating output of the heating unit;
a temperature detection module including a temperature detection unit that periodically detects a temperature distribution on the top plate from above the top plate;
a temperature sensor located at the bottom of the top plate ,
The main body includes a first communication unit that wirelessly communicates with the temperature detection module,
The temperature detection module includes a second communication unit that wirelessly communicates with the main body,
Temperature information detected by the temperature detection unit is transmitted from the second communication unit to the first communication unit,
The heating control unit controls the heating output according to the temperature information sent,
a detection cycle setting unit configured to shorten a cycle of temperature detection by the temperature detection unit when a difference between the temperature detected by the temperature detection unit and the temperature detected by the temperature sensor exceeds a predetermined threshold value; ,
heating cooker. The detection cycle setting unit sets a temperature detection cycle based on the absolute value of the temperature detected by the temperature detection unit .
The heating cooker according to claim 1. The detection cycle setting unit shortens the temperature detection cycle when the absolute value of the temperature detected by the temperature detection unit becomes higher than a predetermined value.
The heating cooker according to claim 2. The detection cycle setting unit sets a temperature detection cycle according to a variation value per unit time of the temperature detected by the temperature detection unit .
The heating cooker according to claim 1. The detection cycle setting unit shortens the temperature detection cycle when a fluctuation value per unit time of the temperature detected by the temperature detection unit exceeds a predetermined fluctuation value.
The heating cooker according to claim 4. The detection cycle setting unit changes the temperature detection cycle according to an instruction from the main body.
The heating cooker according to claim 1. Equipped with a human body detection unit that detects the presence of a human body,
The detection cycle setting unit changes the cycle of temperature detection when the human body detection unit detects a human body.
The heating cooker according to claim 1. The cycle of temperature detection by the temperature detection unit is shorter after the change than the cycle before the change by the detection cycle setting unit.
The heating cooker according to claim 6 or 7. the temperature sensing module comprises a power storage unit;
The power storage unit supplies power to the temperature detection unit and the second communication unit,
The heating cooker according to any one of claims 1 to 8. The temperature detection unit has a plurality of temperature detection elements arranged in an array,
The heating cooker according to any one of claims 1 to 9. The heating unit has a heating coil that generates an induced magnetic field to heat the container,
The heating control unit supplies a high-frequency current to the heating coil to heat the container.
The heating cooker according to any one of claims 1 to 10.

Images