JP2007123162A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker 1 capable of correctly and reliably measuring the temperature of a pan without impairing durability and maintainability of a heating cooker body, in a heating cooker provided with: a body cover 11 covering an upper-surface opening of a body case 10; a top plate 12 installed in a state embedded in the upper surface of the body cover 11; a heating element 13 for heating a cooking appliance mounted on the upper surface of the top plate 12; an operation part 15 for instructing a heating operation of the heating element 13; and temperature detection parts 16 for detecting the temperature of the cooking appliance. <P>SOLUTION: A heat shield part 110 raised upward from the upper surface of the top plate 12 is formed on the upper surface of the body cover 11 and in front of the top plate 12; and the temperature detection parts 16 are mounted on the back surface of the heat shield part 110. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooking device, and more particularly to a cooking device provided with a pan temperature sensor that detects the temperature of a pan placed on a top plate.

A cooking device that detects the temperature of a pan with a temperature sensor such as a thermistor provided on the back of the top plate is generally used. However, in this case, since the heat conducted through the top plate is detected, the actual temperature of the pan is detected. The time lag until the detection was large.
In order to solve this problem, there is known a technique for measuring the pan temperature by detecting infrared rays radiated from the pan bottom from the back side of the top plate (see, for example, Patent Document 1).

  In addition, an infrared sensor is provided on the standing wall formed at the rear of the cooking device, and infrared light emitted from the rear surface of the pan is detected from the rear side of the cooking device, or provided on the front side of the upper surface of the cooking device. In addition, there is an infrared sensor that is provided on a movable part that can be moved up and down to detect infrared rays radiated from the front of the pan from the front side of the cooking device (see, for example, Patent Documents 2 and 3).

FIGS. 5A to 5C are schematic longitudinal sectional views of induction heating cookers 9A, 9B, and 9C exemplified as the conventional heating cooker.
The induction heating cookers 9A, 9B, and 9C operate the heating coil 93 that heats the pan P1 placed on the top plate 92 on the upper surface of the main body case 90 by electromagnetic induction, and the on / off of the heating coil 93 and the set temperature. Operation unit 95, an infrared sensor 96 that detects infrared rays radiated from the pan P1 heated by the heating coil 93, and a control unit that controls the amount of power supplied to the heating coil 93 in accordance with the input of the infrared sensor 96 S.

  In the induction heating cooker 9A shown in FIG. 5A, the infrared sensor 96 is provided at the center of the back surface of the top plate 92 and surrounded by the heating coil 93, and is placed on the top surface of the top plate 92. The infrared ray radiated from the bottom surface of the pan P1 is detected from the back surface of the top plate 92, and the pan temperature is measured by the control unit S based on the detected amount of infrared rays.

  On the other hand, in the induction heating cooker 9B shown in FIG. 5 (b), the infrared sensor 96 is provided on the standing wall surface 900 extending upward from the rear part thereof, and the infrared radiation radiated from the rear side of the pan P1 is induced by cooking. The pan temperature is detected by the control unit S based on the detected amount of infrared rays.

Moreover, in the induction heating cooking appliance 9C shown in FIG.5 (c), the infrared sensor 96 is provided in the movable part 901 which can be protruded up and down provided in the front side of the upper surface, from the front side of the pan P1. The emitted infrared rays are detected from the front of the induction heating cooker 9C, and the pan temperature is measured by the control unit S based on the detected amount of infrared rays.
Therefore, in these things, responsiveness is good compared with what detects the heat conducted from a top plate with a temperature sensor.
JP 2004-241218 A (pages 1-7, FIG. 1) JP 2003-264055 A (FIG. 1) JP 2003-272819 A (pages 4-5, FIG. 6)

However, in the induction heating cooker 9A, since the infrared sensor 96 is provided on the back surface of the top plate 92, it is necessary to detect a minute amount of infrared light that is attenuated when passing through the top plate 92.
For this reason, it is necessary to use a highly sensitive sensor for the infrared sensor 96, but this sensor is easily affected by infrared rays radiated from other components, radio noise generated from the heating coil 93, etc. Could not be measured accurately.

  In addition, in the induction heating cooker 9B, since the infrared rays of the pan P1 are detected from the rear side of the top plate 92 on which the cooking utensils Pn such as other unused pans and kettles are easily placed, the pan P1 and the infrared sensor. When another cooking utensil Pn that is not used and is placed between 96 is placed, there is a problem that the cooking utensil Pn is obstructed by infrared rays and the temperature cannot be detected.

  On the other hand, in the induction heating cooker 9C, if dirt such as boiled oil or oil adheres to gaps or recesses formed at the periphery of the movable part 901 of the infrared sensor 96, the cleaning is extremely burdensome, and the movable part 901 There is a problem that the pan temperature cannot be detected if the movable mechanism of the movable portion 901 breaks down due to contact with the pan P1 or clogging with foreign matter.

The present invention has been made in view of such points,
“A main body cover that covers an upper surface opening of the main body case, a top plate that is embedded in an upper surface of the main body cover, a heating body that heats a cooking utensil placed on the upper surface of the top plate, and the heating In the heating cooker having an operation unit for instructing the body heating operation and a temperature detection unit for detecting the temperature of the cooking utensil, the pan temperature can be adjusted without impairing the durability and maintainability of the heating cooker body. It is an object of the present invention to provide a cooking device that can accurately and reliably measure.

The technical means of the present invention for solving the above problems are as follows:
“On the top surface of the main body cover and in front of the top plate, a heat shield portion is formed that protrudes upward from the top surface of the top plate,
The temperature detection part is provided on the rear surface of the heat shield part.
According to the above technical means, the temperature detection unit directly detects the temperature of a cooking utensil such as a pan or a frying pan placed above the heating body from its front side, and therefore detects infrared rays through the top plate. It is not necessary to adopt a high-sensitivity temperature detection unit unlike the conventional one.

  Moreover, since the temperature detection part is provided in the front side of the top plate where it is difficult to place other cooking utensils that are not used, other cooking utensils like the above-described conventional one that detects infrared rays from the rear side of the pan. There is little risk of disturbing temperature detection.

  Furthermore, since the temperature detector is provided in the heat shield that rises in front of the upper surface of the main body cover, dirt such as spilled oil and oil is movable in the movable part as in the above-described conventional one provided with an infrared sensor in the movable part. There is no problem that it takes a burden on cleaning due to adhesion to gaps or recesses formed on the periphery, and there is no problem that the movable mechanism of the movable part breaks down.

The technical means of the invention according to claim 2 is:
In claim 1,
The direction of the detection surface of the temperature detection unit is set in the upper region of the heating body on the upper surface of the top plate.
In this case, since the direction of the detection surface of the temperature detection unit is set in the upper region of the heating body on the upper surface of the top plate, the side surface temperature at a position close to the bottom surface of the cooking utensil, which is higher than other parts. Is detected.

The technical means of the invention according to claim 3 is:
In claim 1,
The direction of the detection surface of the temperature detection unit is set above the center of the heating body on the upper surface of the top plate.
In this case, since the direction of the detection surface of the temperature detection unit is set above the center of the heating body on the upper surface of the top plate, the side surface temperature at a position close to the bottom surface of the cooking utensil that is higher than other parts. Is detected.

Moreover, even when a cooking utensil having a relatively small diameter is used or when the cooking utensil is used at a position shifted from the center of the heating body, the temperature of the cooking utensil is detected.
That is, there is little possibility that the cooking utensil will deviate from the detection direction of the temperature detection unit.

Since the present invention has the above configuration, the present invention has the following specific effects.
Since it is not necessary to adopt a high-sensitivity temperature detection unit, the temperature detection unit is not easily affected by infrared rays or radio noise emitted from other components, and the temperature of the cooking utensil can be accurately measured.

Moreover, since there is little possibility that another cooking utensil may interfere with temperature detection, the temperature of the cooking utensil can be reliably measured.
Furthermore, even if spilled oil or dirt such as oil adheres to the vicinity of the temperature detection unit, it can be cleaned relatively easily, so maintenance is good and compared to the conventional type in which the temperature detection unit is provided in the movable part. Because it is hard to break down, durability can be maintained.

In the invention which concerns on Claim 2, since the side surface temperature of the position close | similar to the bottom face of the cooking appliance which becomes high temperature compared with another site | part is detected, the temperature of a cooking appliance can be measured more correctly.
In the invention which concerns on Claim 3, since the side surface temperature of the position close | similar to the bottom face of the cooking utensil which becomes high temperature compared with another site | part is detected, the temperature of a cooking utensil can be measured more correctly.

  Moreover, even when using cooking utensils with a relatively small diameter, or when using utensils at a position deviated from the center of the heating body, the cooking utensils deviate from the detection direction of the temperature detector. Since there is little possibility of failing to detect the temperature, the temperature of the cooking utensil can be measured more reliably.

Next, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of an induction heating cooker 1 exemplified as a heating cooker according to an embodiment of the present invention (the side on which an operation unit 15 described later is provided is the front of the induction heating cooker 1, that is, the front side). FIG. 2 is a schematic vertical sectional view thereof. Details of each part will be described below.

As shown in FIG. 1, the induction heating cooker 1 includes a main body case 10 that is mounted in a state of being dropped into a counter hole Ch opened in a counter top C of a system kitchen, and an entire upper surface opening of the main body case 10. A main body cover 11 for covering, a top plate 12 on which cooking utensils such as a pan and a frying pan are placed, heating coils 13 and 13 for heating the cooking utensils by electromagnetic induction, and the heating coil for heating the cooking utensils by radiant heat A heater 14 having a heating amount smaller than 13; an operation unit 15 for operating the heating coils 13 and 13 and the heater 14; and an infrared sensor for detecting infrared rays emitted from the cooking utensil. 16 and 16.
A belt-like heat shield portion 110 having a width substantially the same as the lateral width of the top plate 12 protruding upward from the top surface of the top plate 12 is formed on the upper surface of the main body cover 11 and in front of the top plate 12. An operation unit 15 is provided.

The infrared sensors 16 and 16 are disposed on the rear surface of the heat shield unit 110.
The heat shield 110 prevents the radiant heat from the periphery of the bottom of the cooking utensil, which is relatively hot, from being applied to the operation unit 15 side, and the spilled spilled on the top plate 12 causes the operation unit 15 or It is formed in order to prevent it from flowing down to the front side of the induction heating cooker 1.
The “heating coil 13” corresponds to the “heating body” as the invention specific matter of the first claim, and the “infrared sensor 16” corresponds to the “temperature” as the invention specific matter of the first claim. Corresponds to “detection unit”.

As shown in FIG. 2, a control unit S that controls the operation of the induction heating cooker 1 is accommodated in the main body case 10, and the control unit S includes heating coils 13 and 13, The heater 14, the operation unit 15, and the infrared sensors 16 and 16 are electrically connected.
The top plate 12 is made of heat-resistant glass and is formed in a flat plate shape, and is fitted into the central portion of the main body cover 11.
The heating coils 13 and 13 are arranged on the front side of the back surface of the top plate 12, and the heater 14 is arranged on the rear side.

The heat shield 110 is formed in a mountain-shaped cross section, the operation unit 15 is incorporated in the inclined wall 111 on the front surface, and the infrared sensor 16 is incorporated on the standing wall 112 on the rear surface.
As shown in FIG. 3, the infrared sensor 16 is provided at a position above the top surface of the top plate 12, and the light receiving portion 160 that appears on the standing wall 112 is from a direction parallel to the top plate 12 with the center Q as a base point. A predetermined angle θ (a value calculated from a vertical distance L1 from the center Q of the light receiving unit 160 to the upper surface of the top plate 12 and a horizontal distance L2 from the center Q of the light receiving unit 160 to the center line CL of the heating coil 13), Specifically, it is set in the direction of a point (hereinafter referred to as “reference point”) SP on the upper surface of the top plate 12 and on the center line CL of the heating coil 13.

Therefore, the infrared sensor 16 detects infrared rays emitted from a position close to the bottom surface of the side surface of the pan P1 placed above the heating coil 13.
The “light receiving portion 160” corresponds to the “detection surface” as the invention specifying matter of claim 2 described above.

[Operation control]
Next, operation control of the heating coil 13 in the induction heating cooker 1 will be described (see FIG. 2).
When the on / off switch SW on the heating coil 13 side of the operation unit 15 is pressed, electric power from a power source (not shown) is supplied to the heating coil 13 by the control unit S.

Then, an induction magnetic field is generated in the heating coil 13, and the pan P1 placed on the top surface of the top plate 12 is heated by the induction electromagnetic force.
At this time, the infrared sensor 16 monitors the amount of infrared rays emitted from the heated pan P1, and outputs a signal indicating the amount of infrared rays to the control unit S.

And by the control part S, the measured temperature of the pan P1 calculated from the signal which shows the amount of infrared rays is compared with the target temperature set by the operation part 15, and the electric energy supplied to the heating coil 13 is adjusted. .
In this device, the infrared sensor 16 is provided on the standing wall 112 of the heat shield 110 located in front of the top plate 12, and directly receives infrared light from the front side of the pan P <b> 1 placed above the heating coil 13. Therefore, it is not necessary to use a high-sensitivity sensor corresponding to a minute amount of infrared rays for the infrared sensor 16.
Therefore, the temperature of the pan P1 can be accurately measured without being easily influenced by infrared rays radiated from other components, radio noise generated from the heating coil 13, or the like.

In addition, since the infrared sensor 16 is provided on the front side of the top plate 12 on which other cooking utensils that are not used are difficult to be placed, there is little possibility that other cooking utensils interfere with infrared rays emitted from the pan P1. The temperature of the pan P1 can be reliably measured.
Furthermore, since the infrared sensor 16 is provided above the top surface of the top plate 12, boiled spills that have flowed out on the top plate 12 are less likely to adhere directly to the light receiving unit 160, so that the temperature of the pan P1 can be measured more reliably. .

On the other hand, by setting the light receiving unit 160 of the infrared sensor 16 in the direction of the reference point SP (see FIG. 3), the temperature of the side surface at a position close to the bottom surface of the pan P1 that is hotter than other parts is detected. Therefore, the temperature of the pan P1 can be measured more accurately.
Further, even when a shallow cooking utensil such as the frying pan P2 is used, since infrared rays radiated from a position close to the bottom surface of the side surface are detected, the temperature can be accurately measured.

Furthermore, even when the center position of the pan P1 is shifted back and forth from the center line CL of the heating coil 13 or when a cooking utensil having a small diameter such as a vertically long kettle P3 is used, the cooking utensil is at a temperature. There is little possibility that the sensor 16 will deviate from the detection direction and fail to detect the temperature.
Therefore, the temperature can be reliably measured.

[Others]
In the above embodiment, the infrared sensor 16 is provided above the top surface of the top plate 12, and the light receiving portion 160 is set so as to be in the direction of the reference point SP (see FIG. 3). ) Is a direction that can detect infrared rays emitted from the side surfaces of cooking utensils such as the pan P1 and the frying pan P2 placed above the heating coil 13, the light receiving unit 160 is forward or backward from the reference point SP. It may be set in the direction.
However, it is preferable to set within the range of the upper region of the heating coil 13 on the upper surface of the top plate 12.

As shown in FIG. 4, the infrared sensor 16 may be provided at substantially the same position as the top surface of the top plate 12 and the light receiving unit 160 may be set substantially horizontal.
In this case, infrared rays radiated from a position close to the bottom of the side surface such as the pan P1 and the frying pan P2 are detected, so that the temperature can be accurately and reliably measured regardless of the position, type and size of the cooking utensil.

  Furthermore, although the heating cooker in the said embodiment was demonstrated as a built-in type used in the state of being dropped on the counter top of the system kitchen, Alternatively, it may be a desktop type that is easy to carry and used on a table or the like.

The perspective view of the induction heating cooking appliance 1 illustrated as a heating cooker which concerns on embodiment of this invention The longitudinal cross-sectional schematic diagram of the induction heating cooking appliance 1 illustrated as a heating cooker which concerns on embodiment of this invention The longitudinal cross-sectional schematic diagram of the heat-shielding part 110 vicinity of the induction heating cooking appliance 1 illustrated as a cooking-by-heating machine which concerns on embodiment of this invention. The longitudinal cross-sectional schematic of the heat insulation part 110 vicinity of the induction heating cooking appliance 1 illustrated as other embodiment of this invention Longitudinal cross-sectional schematic diagram of induction heating cookers 9A, 9B, 9C exemplified as conventional cooking devices

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cooking device 10 ... Main body case 11 ... Main body cover 110 ... Heat-shielding part 12 ... Top plate 13 ... Heating body 15 ... Operation part 16 ... Temperature detection Part

Claims (3)

A main body cover covering the upper surface opening of the main body case, a top plate laid in an embedded state on the upper surface of the main body cover, a heating body for heating a cooking utensil placed on the upper surface of the top plate, and the heating body In a heating cooker provided with an operation unit for instructing the heating operation and a temperature detection unit for detecting the temperature of the cooking utensil,
On the upper surface of the main body cover and in front of the top plate, a heat shield portion that protrudes upward from the upper surface of the top plate is formed,
The said temperature detection part is a heating cooker provided in the rear surface of the said heat-insulation part. The heating cooker according to claim 1, wherein
The detection surface of the temperature detection unit is a heating cooker in which the direction is set in an upper region of the heating body on the upper surface of the top plate. The heating cooker according to claim 1, wherein
The detection surface of the temperature detection unit is a heating cooker whose direction is set above the center of the heating body on the upper surface of the top plate.

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