JPWO2007148404A1 - Electromagnetic induction heating device - Google Patents

Abstract

Provided is an electromagnetic induction heating apparatus capable of accurately and efficiently heating an object to be heated, which is very important to be heated to a certain optimum temperature, to the optimum temperature regardless of the difference in the initial temperature. A plate 3 on which the object to be heated A is placed, a heating coil 4 that generates a high-frequency magnetic field disposed in a lower part of the plate 3, a temperature sensor 6 that detects the temperature of the object to be heated A, and the object A to be heated The heating temperature setting means 7 for setting the heating temperature of the heating coil 4 and the control means 5 for stopping the output of the heating coil 4 when the temperature Ta detected by the temperature sensor 6 reaches the heating temperature Tb by the heating temperature setting means 7 are provided. It is characterized by.

Description

  The present invention relates to an electromagnetic induction heating device, and more particularly to an electromagnetic induction heating device that can be suitably used to accurately heat an iron pan having an annular rib on a bottom surface to an appropriate temperature.

The applicants have developed an original product called “Beef Pepper Rice” (registered trademark) and are developing a franchise chain of restaurants.
This “Beef Pepper Rice” is an iron plate with excellent heat retention, heated to an appropriate temperature and served with rice and sliced raw beef. It is a dish that you can eat with rice while cooking to your liking.

The important thing in this dish is to heat an iron dish on which raw beef is placed to the optimum temperature.
That is, in the case of baking raw meat, the umami of meat will overflow unless the surface is baked at a high temperature exceeding 250 ° C.
On the other hand, when the iron pan is at a high temperature exceeding 300 ° C., various materials placed on the iron pan are burnt, which is not preferable.
Therefore, the heating temperature of the iron pan is set to an appropriate temperature of 290 to 300 ° C.

Currently, the iron pan is heated by controlling the heating time using a commercial electromagnetic cooker.
In other words, an iron pan is placed on the plate of the electromagnetic cooker, a heating coil disposed under the plate is energized to generate a high frequency magnetic field, an eddy current is generated inside the iron pan, and the iron pan is self Heating the iron pan to an appropriate temperature is performed by generating heat and performing this for a predetermined time set by a timer (specifically, about 1 minute and 10 seconds).

However, in the heating method of the iron pan by the time control using the electromagnetic cooker mentioned above, it has arisen that the temperature of the iron pan after a heating differs greatly by the difference in the initial temperature of an iron pan.
That is, for example, in winter and summer, there is a difference of about 30 ° C. in the initial temperature of the iron pan.
In addition, the initial temperature of the iron pan varies depending on the region and the weather. Furthermore, when the pan is washed using a dishwasher, the pan immediately after that is over 60 ° C. Yes.

When these induction plates with different initial temperatures are subjected to electromagnetic induction heating for the same time using an electromagnetic cooker, the temperature of the heated iron plate will naturally differ, and the heated iron plate will be heated to an appropriate temperature. There were cases where it was impossible to obtain.
This leads to the inability to provide cookery customers with uniform food quality, and in order to develop a franchise chain that emphasizes the ability to provide the same deliciousness regardless of where you eat, It was a big problem.

  The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to heat an object to be heated to an optimum temperature regardless of the difference in the initial temperature. Another object of the present invention is to provide an electromagnetic induction heating apparatus capable of heating accurately and efficiently to an optimum temperature.

The electromagnetic induction heating device according to claim 1 of the present invention achieves the above object,
A plate on which the object to be heated is placed; a heating coil that generates a high-frequency magnetic field disposed in a lower part of the plate; a temperature sensor that detects the temperature of the object to be heated; and a heating temperature of the object to be heated. A heating temperature setting means for setting and a control means for stopping the output of the heating coil when the temperature detected by the temperature sensor reaches the heating temperature by the heating temperature setting means are provided.

  According to a second aspect of the present invention, when the temperature detected by the temperature sensor reaches the heating temperature set by the heating temperature setting means, the control means stops the output of the heating coil and notifies the end of heating of the object to be heated. Control that emits sound and / or light is performed.

  According to a third aspect of the present invention, the temperature sensor receives an infrared ray emitted from the heated object, and detects the temperature of the heated object from the received infrared ray. The portion is disposed above the heated body.

  According to a fourth aspect of the present invention, an air nozzle is provided in the vicinity of the light receiving portion of the infrared sensor for preventing contamination of the light receiving portion due to oil smoke or the like.

  According to a fifth aspect of the present invention, a target light indicating a direction in which the light receiving portion faces is disposed in the vicinity of the light receiving portion of the infrared sensor.

  According to a sixth aspect of the present invention, the infrared sensor is a fiber-type infrared sensor in which a light receiving unit and a control unit are separated and connected between them by an optical fiber, and the light receiving unit is disposed above the object to be heated. And the control unit is disposed inside the main body.

  Further, as shown in claim 7, a seasoning container shelf is further provided on the arm.

  According to claim 1, the electromagnetic induction heating device according to the present invention includes a plate on which the object to be heated is placed, a heating coil that generates a high-frequency magnetic field disposed in a lower part of the plate, and the temperature of the object to be heated. A temperature sensor for detecting the heating temperature, a heating temperature setting means for setting the heating temperature of the object to be heated, and a control means for stopping the output of the heating coil when the temperature detected by the temperature sensor reaches the heating temperature by the heating temperature setting means. Because it is equipped, it is possible to accurately and efficiently heat an object to be heated, which is very important to be heated to a predetermined optimum temperature, to the predetermined optimum temperature regardless of the difference in the initial temperature. Can do.

  According to claim 2, the control means stops the output of the heating coil when the temperature detected by the temperature sensor reaches the heating temperature by the heating temperature setting means, and notifies the end of heating of the object to be heated. And / or control to emit light, so even if the customer who is the cook is doing other work, the heating end of the heated object can be known by sound or light, and the heated object heated to the optimum temperature You can eat immediately without cooling your body.

  According to a third aspect of the present invention, the temperature sensor receives the infrared rays emitted from the heated object, and detects the temperature of the heated object from the received infrared rays, wherein the light receiving portion of the infrared sensor has an arm. It is arrange | positioned above the to-be-heated body which does not disturb a cook via.

  The installation position of the temperature sensor is critical. For example, when a contact-type temperature sensor such as a thermocouple or thermistor is provided on the lower surface of the plate on which the object to be heated is placed, the temperature of the object to be heated is Therefore, it is difficult to accurately measure the temperature of the object to be heated, and when the object to be heated has an annular rib on the bottom surface, or the heating rate of the object to be heated is high. In this case, it becomes more difficult to measure the actual temperature of the heated object.

  Further, when a contact-type temperature sensor is disposed on the upper surface of the plate or a contact-type temperature sensor is disposed in a state of protruding from the upper surface of the plate, it becomes an obstacle when the heated object is raised or lowered on the plate. At the same time, there is a high concern that the temperature sensor will be damaged.

  Furthermore, when the contact-type temperature sensor is configured to directly contact the heated object manually and detect the temperature, the operation of contacting the temperature sensor with the heated object, or the contact of the temperature sensor with the heated object is performed. Work to confirm is essential, which is also not preferable from the viewpoint of workability and safety.

  With respect to these problems, in the electromagnetic induction heating device according to the present invention, the temperature sensor is an infrared sensor that receives the infrared rays emitted from the heated object and detects the temperature of the heated object from the received infrared rays. Is disposed above the heated object that does not interfere with the cooker via the arm, so that the temperature of the heated object can be accurately measured in a non-contact state and on the plate of the heated object The temperature sensor does not get in the way when moving up and down, and there is no fear of damaging the temperature sensor.

According to a fourth aspect of the present invention, an air nozzle is provided in the vicinity of the light receiving portion of the infrared sensor for preventing contamination of the light receiving portion due to oily smoke or the like.
Since the infrared sensor receives infrared rays emitted from the heated object and detects the temperature thereof, dirt on the light receiving unit may interfere with infrared reception and make accurate temperature measurement impossible. However, since an air nozzle is provided in the vicinity of the light receiving portion of the infrared sensor and the light receiving portion is prevented from being soiled by blowing air from the air nozzle, accurate temperature measurement can be realized over a long period of time.

According to the fifth aspect of the present invention, the target light indicating the direction in which the light receiving unit faces is disposed in the light receiving unit of the infrared sensor.
Infrared light received by the infrared sensor is invisible light, but by arranging a target light, whether or not the light receiving part of the infrared sensor truly receives infrared light emitted from the heated object, in other words, In this case, since it is always possible to visually check whether the light receiving part of the infrared sensor is correctly oriented in the direction of the heated object, accurate temperature measurement of the heated object can be realized.

According to a sixth aspect of the present invention, the infrared sensor is a fiber-type infrared sensor in which a light receiving unit and a control unit are separated and connected between them by an optical fiber, and the light receiving unit is disposed above the object to be heated. The control unit is disposed inside the main body.
Since only the light receiving part is arranged above the heated body, it is easy to secure the installation space, and the control part which dislikes heat, dirt, impact, etc., that is, the received infrared energy is converted into electric energy, Since the central portion of the infrared sensor that converts the electric energy into temperature can be disposed inside the main body, a highly reliable electromagnetic induction heating device that can be used over a long period of time can be provided.

  According to the seventh aspect, since the seasoning container shelf is additionally provided on the arm, the seasoning container shelf does not require an independent arm, and a customer who is a cook is heating the object to be heated. Any seasoning can be used according to taste without being disturbed by the seasoning container placed on the plate.

1 is a front view of an electromagnetic induction heating device according to Example 1. FIG. 3 is a detailed view of a temperature sensor portion of the electromagnetic induction heating device according to Embodiment 1. FIG. 3 is a flowchart of a control unit of the electromagnetic induction heating device according to the first embodiment. It is a front view of the real machine of the electromagnetic induction heating apparatus which concerns on Example 2. FIG. 6 is a graph showing the temperature measurement result of an iron pan in an actual machine according to Example 2. It is explanatory drawing of the electromagnetic induction heating apparatus which concerns on Example 3, (a) (b) (c) is a rear view, a front view, and a side view, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating device 2 Main body 3 Plate 4 Heating coil 5 Control means 6 Temperature sensor (infrared sensor)
7 Heating temperature setting means 8 Buzzer 9 Arm 10 Light receiving part of temperature sensor (infrared sensor) 11 Control part of temperature sensor (infrared sensor) 12 Optical fiber 13 Air nozzle 14 Opening 15 Target light 18 Operation panel 23 Common duct 28 Signal line 31 Seasoning container shelf 31a ３２ 32, 33 Seasoning container 34, 35 Chair A Heated object (iron plate)
Ta Temperature detected by temperature sensor Tb Heating temperature by heating temperature setting means K Air curtain P Visible light cc, dd Cut line

  Embodiments of a heating apparatus using electromagnetic induction heating according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of an electromagnetic induction heating device according to a first embodiment. The electromagnetic induction heating device 1 includes a plate 3 made of a crystal glass plate or a ceramic plate on the upper surface of a main body 2. .
A part of the main body 2 shows a member incorporated by being incised by an incision line dd.
Further, a part of the upper side of the arm 9 is cut in the middle of the cutting lines cc and cc, and a member to be incorporated is shown.
A heating coil 4 that generates a high-frequency magnetic field of, for example, about 40 KHz is disposed below the plate 3, and the output of the heating coil 4 is controlled by a control means 5 provided at the bottom of the main body 2. .

  The control means 5 stores a program for performing heating by controlling an inverter circuit (not shown) that supplies a high-frequency current to the heating coil 4 by operating a start key (not shown) by the cook. In addition, information of the detected temperature Ta by the temperature sensor 6 that detects the temperature of the heated object A placed on the plate 3 and the heating set by the heating temperature setting means 7 provided on the front surface of the main body 2 Information on the temperature Tb is transmitted, and based on these information, when the detected temperature Ta by the temperature sensor 6 reaches the heating temperature Tb by the heating temperature setting means 7, the output of the heating coil 4 is stopped, Control is performed to supply power to the buzzer 8 that notifies the end of heating for a predetermined time.

  The temperature sensor 6 detects the temperature of the object A to be heated with high accuracy without disturbing the cook, and the light receiving unit 10 is arranged on an arm 9 that is erected on the main body 2 and has a height of about 1 m, for example. A so-called fiber-type infrared sensor is used in which a control unit 11 is disposed in the main body 2 and the light receiving unit 10 and the control unit 11 are connected by an optical fiber 12. The temperature of the heating element A is detected in a non-contact state from above.

FIG. 2 is a detailed view of the temperature sensor (infrared sensor) portion. In the vicinity of the light receiving portion 10 of the infrared sensor 6, an air nozzle 13 for preventing the light receiving portion 10 from being contaminated by oily smoke is disposed. Yes.
The air nozzle 13 may have a structure in which air is directly blown toward the light receiving unit 10 to prevent dirt from adhering to the light receiving unit 10, but the one shown in FIG. 2 supports the light receiving unit 10. An air nozzle 13 that forms a so-called air curtain K that closes the opening 14 formed in the arm 9 is disposed to prevent oil smoke or the like from entering the arm 9 itself.

  Further, the light receiving unit 10 of the infrared sensor 6 is provided with a target light 15 indicating the direction in which the light receiving unit 10 faces. This target light 15 emits visible light P having a strong directivity, and as shown in FIG. 1, it is always determined whether or not the light receiving unit 10 of the infrared sensor 6 is correctly oriented in the direction of the object A to be heated. It can be confirmed.

  Next, operation | movement of the electromagnetic induction heating apparatus 1 which concerns on a present Example is demonstrated based on FIG. FIG. 3 is a control flowchart of the control means 5, and in step 21, the operation of the start key by the cook is detected to recognize that the heating has started.

  When the control means 5 detects the operation of the start key, the control means 5 moves to step 22 and controls the inverter circuit to start the input of the specified output to the heating coil 4. As a result, the heating coil 4 generates a high-frequency magnetic field, generates an eddy current in the heated object A placed on the plate 3, and heats the heated object A by self-heating.

  Then, the control means 5 moves to step 23 and recognizes information of the detected temperature Ta by the temperature sensor 6. Next, in step 24, the detected temperature Ta is compared with a heating temperature (for example, 300 ° C.) Tb preset by the cooker using the heating temperature setting means 7.

  As a result, if the detected temperature Ta does not reach the heating temperature Tb, that is, it is determined as “NO”, the process returns to step 23 again, and the temperature measurement of the heated object A by the temperature sensor 6 is continued. On the other hand, when the detected temperature Ta has reached the heating temperature Tb, that is, when it is determined “YES”, the output step 25 of “stop heating” is performed, and the output of the heating coil 4 is stopped by controlling the inverter circuit. Further, the process proceeds to step 26, where power is supplied to the buzzer 8 for informing the end of heating for a predetermined time, and then the process proceeds to the end (end) step 27.

  Thus, the heating apparatus 1 using electromagnetic induction heating according to the present invention includes a temperature sensor 6 that detects the temperature of the heated object A, a heating temperature setting means 7 that sets the heating temperature of the heated object A, And a control means 5 for stopping the output of the heating coil 4 when the temperature Ta detected by the temperature sensor 6 reaches the heating temperature Tb by the heating temperature setting means 7. Regardless of the difference, the heating temperature can be accurately and efficiently heated to the optimum temperature (for example, 300 ° C.) set by the heating temperature setting means 7.

  FIG. 4 is a front view of the actual machine of the electromagnetic induction heating apparatus according to the second embodiment. This actual machine is a compact type including the two heating apparatuses 1 and 1 and makes the arm 9 graspable and portable. You can also The same members as those in Example 1 are denoted by the same reference numerals. Reference numeral 18 which is not described in the first embodiment is an operation panel for performing power supply operations such as power ON / OFF, power switching, and heating temperature setting / detection temperature display.

FIG. 5 shows the result of temperature measurement by the temperature sensor 6 when the heating temperature is set to 300 ° C. by the heating temperature setting means 7 and the steel pan weighing about 3.5 kg is heated in the actual machine shown in FIG. A graph is shown.
From this graph, the temperature sensor 6 measures the temperature of the iron pan, which is the object to be heated A, in real time, and accurately and efficiently heats the iron pan to 300 ° C. set by the heating temperature setting means 7. I understand that.

FIG. 7 is an explanatory diagram of Embodiment 3, and (a), (b), and (c) are a rear view, a front view, and a side view, respectively.
7A, a part of the upper side of the arm 9 is incised in the middle of the incision lines cc and cc, and the configuration of the infrared temperature sensor 6 is shown. Among the details, the case of the first embodiment is described. Description of similar parts is omitted.

However, the optical fiber 12 is provided for each temperature sensor, and is connected from the upper side of the arm 9 to the control unit 11 (not shown) installed inside the main body 2 through the inside of the side.
On the other hand, the air nozzle 13 is derived from a common duct 23, and the common duct 23 is connected to a control unit 11 (not shown) installed inside the main body 2 from the upper side of the arm 9 through the inside of the side.
The operation panel 18 is provided on one side (rear side) of the upper side of the arm 9, and a signal line (not shown) disposed on the light receiving unit 10 of the temperature sensor via the signal line 28 and inside the arm. To the control unit 11 (not shown).

  As shown in FIGS. 7B and 7C, a seasoning container shelf 31 is provided on the side of the upper side of the arm 9 opposite to the operation panel 18, that is, on the front side, in parallel with the upper side of the arm 9. On the seasoning container shelf 31, arbitrary seasoning containers 32 and 33 are placed in accordance with the positions of the plurality of heated objects A. The seasoning container shelf 31 is provided with a bowl 31a for preventing the container from falling.

Therefore, a customer who is a cook can not only take a favorite seasoning from a nearby shelf and season it, but the store side can quickly arrange and remove the seasoning container along the longitudinal direction of the shelf.
Moreover, the customer's chair 34, which is a cook, may be only on one side of the plate 3 as shown in Fig. (B). However, as shown by the broken line shown in Fig. (C), the chair 35 is further provided. May be on the opposite side of the chair 34.

  As mentioned above, although the embodiment of the electromagnetic induction heating device according to the present invention has been described, the present invention is not limited to the embodiment described above, and the technical idea of the present invention, that is, the initial temperature Regardless of the difference, in order to heat the heated object accurately and efficiently to the optimum temperature, the temperature of the heated object in the heating process is detected by a sensor, and the detected temperature is set by the heating temperature setting means. Various modifications and changes can be made within the scope of the technical idea of an electromagnetic induction heating device that performs control to stop heating of an object to be heated when the temperature is reached.

  In addition, it is naturally possible to add the accessory detection function, the airing prevention function, the temperature rise prevention function, and the like, which are put into practical use in a conventionally known electromagnetic cooker, to the electromagnetic induction heating device according to the present invention.

According to the present invention, a compact, safe and inexpensive electromagnetic induction heating apparatus capable of accurately controlling the temperature of the heated object is obtained, so that not only when a customer becomes a cook, but also general induction specialized electromagnetic induction. It is also useful as a heating device.

Claims (7)

  A plate on which the object to be heated is placed; a heating coil that generates a high-frequency magnetic field disposed in a lower part of the plate; a temperature sensor that detects the temperature of the object to be heated; and a heating temperature of the object to be heated. Electromagnetic induction heating comprising heating temperature setting means for setting and control means for stopping the output of the heating coil when the temperature detected by the temperature sensor reaches the heating temperature by the heating temperature setting means apparatus   Control in which the control means stops the output of the heating coil when the temperature detected by the temperature sensor reaches the heating temperature by the heating temperature setting means, and emits a sound and / or light notifying the end of heating of the object to be heated. The electromagnetic induction heating device according to claim 1, wherein   The temperature sensor is an infrared sensor that receives infrared rays emitted from the object to be heated, and detects the temperature of the object to be heated from the received infrared rays. The electromagnetic induction heating device according to claim 1, wherein the electromagnetic induction heating device is disposed above the heating body.   The electromagnetic induction heating device according to claim 3, wherein an air nozzle for preventing contamination of the light receiving portion due to oily smoke or the like is disposed in the vicinity of the light receiving portion of the infrared sensor.   5. The electromagnetic induction heating device according to claim 3, wherein a target light indicating a direction in which the light receiving unit faces is disposed in the vicinity of the light receiving unit of the infrared sensor.   The infrared sensor is a fiber-type infrared sensor in which a light receiving unit and a control unit are separated and connected therebetween by an optical fiber, the light receiving unit is disposed above the heated body, and the control unit is a main body. The electromagnetic induction heating device according to claim 3, 4 or 5, wherein the electromagnetic induction heating device is disposed inside. The electromagnetic induction heating device according to any one of claims 3 to 6, wherein a seasoning container shelf is further provided on the arm.

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