JP2005243534A - Induction heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating device easy to use by displaying a directly or indirectly detected heating object temperature. <P>SOLUTION: A control means 7 outputs a temperature detected by a temperature detection means 12 for directly or indirectly detecting a temperature of a heating object 5 to an operation means 8 including a display part 9 for displaying a status of an apparatus; and the operation means 8 displays the detected temperature. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an induction heating apparatus such as an induction heating cooker, an induction heating type water heater, a humidifier, or an iron.

Conventionally, as this type of induction heating apparatus, for example, a technique for making it easier to see the oil temperature during cooking of deep-fried foods such as thermal power at the time of basic operation and tempura for an induction heating cooker is known (for example, Patent Document 1). reference).
JP 2003-157960 A

  However, as shown in the display example of the display structure section shown in FIG. 3, the conventional technique is a structure that displays the thermal power and the oil temperature during frying cooking by the number of lighting of the bar graph. As it becomes, the height is made higher.

  Therefore, especially when cooking fried food, the level of temperature can be intuitively known, but the absolute value of the current temperature cannot be known. For example, in the case where the temperature has changed, for example, after food has been put into the pan, it has not been possible to determine whether the temperature is appropriate for the user to start cooking.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an induction heating apparatus that displays the temperature of an object to be heated that is directly or indirectly detected and is easy to use.

  In order to solve the above-mentioned conventional problems, in the induction heating apparatus of the present invention, the control means displays the temperature detected by the temperature detection means for directly or indirectly detecting the temperature of the object to be heated and displays the state of the device. The operation means is for displaying the detected temperature.

  Accordingly, the user can recognize the current temperature of the object to be heated as a numerical value, and the induction heating apparatus can be made easy to use and can determine the timing for starting cooking.

  The induction heating apparatus of the present invention can provide an induction heating apparatus that is easy to use by displaying the temperature of an object to be heated that is directly or indirectly detected.

  According to a first aspect of the present invention, there is provided a heating coil that induction-heats an object to be heated placed above, an inverter that supplies high-frequency power to the heating coil, a control unit that performs output control of the inverter, and a state of the device The control unit includes a display unit for displaying, an operation unit that communicates with the control unit, and a temperature detection unit that directly or indirectly detects the temperature of the object to be heated and outputs a detection signal to the control unit. The means outputs the temperature detected by the temperature detecting means to the operating means, and the operating means is an induction heating device that displays the detected temperature, so that the user recognizes the current temperature of the object to be heated as a numerical value. It is possible to determine the timing for starting cooking and the like, and the usability can be improved.

  According to a second aspect of the present invention, in the first aspect of the invention, the operating means includes a temperature display key, and when the temperature display key is pressed, the operating means is an induction heating device that displays the detected temperature. is there. While the operation means space is limited, it is desirable that the characters and symbols displayed on the operation means are simple and easy to understand from the viewpoint of universal design. In the present invention, by displaying the detected temperature when the temperature display key is pressed, it is possible to switch between the thermal power display and the detected temperature display, and to share the display part. It is possible to make the display of the operation means large and easy to see.

  According to a third aspect of the invention, in particular, in the first aspect of the invention, the operating means includes a temperature setting key, and when the object to be heated is substantially the same as the temperature setting by the temperature setting key, the control means The induction heating apparatus performs suppression control. As a result, it is possible to estimate the time required for preheating by comparing the temperature of the heated object and the set temperature, and the temperature of the heated object can also be adjusted. It does not take.

  According to a fourth aspect of the invention, in particular, in the third aspect of the invention, the operating means is an induction heating device that performs a display corresponding to the display unit when the heated object is substantially the same as the temperature setting by the temperature setting key. It is. This makes it easy to determine whether or not the set temperature has been reached, for example, when the set temperature cannot be displayed using the temperature setting key due to a limitation on the operation means space.

  According to a fifth aspect of the invention, in particular, in the fourth aspect of the invention, the operating means includes a ringing portion, and when the object to be heated becomes substantially the same as the temperature setting by the temperature setting key, induction heating is performed by the ringing portion. It is a device. Thereby, even if the user has moved to a place away from the induction heating device, it can be easily recognized that the set temperature has been reached.

  In a sixth aspect of the invention, in particular, in the third aspect of the invention, the operating means is an induction heating device that displays an estimated time until the heated object becomes substantially the same as the temperature setting by the temperature setting key. As a result, the user can recognize the time until the next cooking is started, and can start another work to shorten the entire cooking time.

  In a seventh aspect of the invention, in particular, in the first aspect of the invention, after the inverter is stopped, the operation means is an induction heating device that performs display corresponding to the display unit until the temperature detected by the temperature detection means becomes a predetermined value or less. Is. This makes it possible to call the user's attention with the corresponding display on the display unit, especially when the temperature is high, and even in other cases, the temperature is specifically known by displaying the detected temperature. Therefore, it can be used more safely.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 show an induction heating apparatus according to Embodiment 1 of the present invention, and particularly show an induction heating cooker.

  FIG. 1 is a schematic configuration diagram of an induction heating cooker according to Embodiment 1 of the present invention.

  In FIG. 1, the elements which comprise an induction heating cooking appliance are demonstrated in order. Reference numeral 3 denotes an inverter that generates a high-frequency current by high-frequency switching.

  The heating coil 4 is connected to the inverter 3 and supplied with a high-frequency current.

  A heated object 5 such as a pan or a frying pan is placed above the heating coil 4 via a top plate 6 constituting the top surface of the device.

  The control means 7 is connected to the inverter 3 and performs output control of the inverter 3.

  The operation unit 8 includes a display unit 9 configured by a liquid crystal or the like for displaying the state of the device and a ringing unit 10 including a buzzer and the like, and communicates with the control unit 7.

  Temperature detecting means 12 such as a thermistor is in contact with the inner surface of the housing 11 of the top plate 6 and indirectly detects the temperature of the heated body 5 through the top plate 6. The detection signal is output to the control means 7 to which the temperature detection means 12 is connected. Further, the control means 7 communicates with the operation means 8, and the operation means 8 can also recognize information related to the temperature detected by the temperature detection means 12.

  FIG. 2 shows an enlarged view of the operating means 8 of the induction heating cooker in the first embodiment of the present invention. FIG. 2A shows a display on the operation means 8 display unit 9 during normal heating. FIG.2 (b) has shown the display part 9 at the time of the to-be-heated body 5 temperature display during a heating. FIG.2 (c) has shown the display part 9 which displays the estimated time until the to-be-heated body 5 temperature reaches preset temperature. FIG. 2D shows a display on the operation means 8 display section 5 when the temperature of the heated object 5 reaches the set temperature. FIG.2 (e) shows the display part 9 which has performed the display which calls attention, when the to-be-heated body 5 or the top plate 6 is high temperature and there exists a possibility of injury if a user touches after completion | finish of a heating. ing.

  The operating means 8 includes a heating / stop key 13 for setting heating and stopping of the inverter 3, a fried food heating / stop key 14 which is a heating / stop key of the inverter 3 for the purpose of adjusting the temperature of the object 5 to be heated, 3, a temperature setting key 15 for setting the output 3 and the temperature of the heated object 5, a temperature display key 16 for switching display of the display unit 9, and starting and stopping the temperature display, and a display unit 9.

  When the temperature is set by the user via the temperature setting key 15 and the fried food heating / stop key 14 is pressed, the operation means 8 transmits an output setting signal to the control means 7. The control means 7 starts the operation of the inverter 3 in order to start induction heating while recognizing the temperature detected by the temperature detection means 12. Since the temperature detection means 12 indirectly detects the temperature of the heated body 5, the control means 7 corrects the detected temperature and estimates the temperature of the heated body 5.

  When it is estimated that the temperature of the heated body 5 reaches the set temperature and is substantially the same, the control means 7 controls the output of the inverter 3 so that the heated body 5 temperature is substantially equal to the set temperature. I do. At the same time, the operation means 8 recognizes that the heated object 5 has reached the set temperature from the output signal from the control means 7, and performs notification by the sounding part 10 simultaneously with the display corresponding to the display part 9.

  When the temperature display key 16 is pressed by the user, the operation means 8 performs display switching of the display unit 9. Until the temperature display key 16 is pressed, the display showing the output level of the inverter 3 as shown in FIG. In accordance with the number of times the temperature display key 16 is pressed, the current heated object 5 temperature display as shown in FIG. 2B and the estimated time until the heated object 5 reaches the set temperature as shown in FIG. Then, the display of the output level of the inverter 3 is switched again as shown in FIG.

  Since the temperature detection means 12 indirectly detects the temperature of the heated object 5, the control means 7 estimates the time until the heated object 5 temperature becomes substantially the same as the temperature setting by the temperature setting key 15. Then, the display on the operation means 8 display unit 9 becomes possible.

  When cooking by the user is finished and the fried food heating / stop key 14 is pressed, the operation means 8 outputs an output stop signal to the control means 7, and the control means 7 stops the inverter 3. Even after the inverter 3 is stopped, the operation means 8 continues to recognize the temperature detected by the temperature detection means 12 through the control means 7. The temperature detecting means 12 indirectly detects the temperature of the heated body 5 when the heated body 5 is placed on the top plate 6, but when the heated body 5 is removed. Detects the temperature of the top plate 6 itself. When the operation means 8 determines that it is dangerous for the user to touch, that is, until the temperature becomes equal to or lower than a predetermined value held by the operation means 8 or the control means 7, a display corresponding to the display unit 9 is performed. Call the user's attention.

  With the configuration as described above, the first operation of the present embodiment will be described. By switching the display unit 9 by operating the temperature display key 15, the operation unit 8 can recognize the current temperature of the heated object 5 as a numerical value, and can determine when to start cooking. It is possible to improve usability.

  For example, in frying pan cooking with a frying pan that does not require temperature adjustment that is substantially the same as the set temperature, preheating is started with a large output, and when the frying pan is hot enough, the cooked product is put into the frying pan to perform substantial cooking. Start. In that case, the temperature setting at the beginning of heating is omitted, and heating is started only by the output setting. That is, the heating / stop key 13 is pressed to start heating. The user may press the temperature display key 16 to recognize the current temperature of the frying pan that is the heated object 5 and start cooking at an appropriate temperature and timing.

  In addition, although the temperature detection means 12 mentioned the structure which indirectly detects the to-be-heated body 5 temperature via the top plate 6, for example, the temperature detection means 12 is located upwards from the hole provided in the top plate 6. In addition, the temperature may be detected by directly contacting the heated body 5. Moreover, the temperature detection means 12 which detects temperature from the infrared rays radiated | emitted from the to-be-heated body 5 may be sufficient.

  Next, the second operation of the present embodiment will be described. When the temperature display key 16 is pressed, display switching of the display unit 9 as shown in FIG. 2 is performed, so that it is not necessary to display extra information on the display unit 9. While the space of the operation means 8 and the display unit 9 is limited, it is desirable that the characters and symbols displayed on the operation means 8 are simple and easy to understand from the viewpoint of universal design.

  In the present embodiment, when the temperature display key 16 is pressed, the display of the display unit 9 is switched, and the detected temperature is displayed on the shared display unit 9 by displaying the detected temperature. Therefore, the display of the operation means 8 can be made simple and easy to see.

  Next, the third operation of the present embodiment will be described. The user can start heating after setting the temperature by the operating means 8. Further, when the heated body 5 becomes substantially the same as the temperature setting, the control means 7 performs the suppression control of the output of the inverter 3 so that the heated body 5 temperature is substantially equal to the set temperature. It is possible to estimate the time required for the approximate preheating by comparing the temperature of the body 5 and the set temperature, and the temperature of the body 5 to be heated can be adjusted.

  Next, the fourth operation of the present embodiment will be described. When the object 5 to be heated is substantially the same as the temperature setting by the temperature setting key 16, the operation means 8 performs a display corresponding to the display unit 9 and notifies the user. This makes it easy to determine whether or not the set temperature has been reached, for example, when the set temperature by the temperature setting key 15 cannot be displayed due to space limitations on the operation means 8 display unit 9.

  Next, the fifth operation of the present embodiment will be described. Since the operation unit 8 includes the ringing unit 10, the ringing unit 10 can notify when the heated object 5 becomes substantially the same as the temperature setting by the temperature setting key 15. Thereby, even if the user has moved to a place away from the induction heating device, it can be easily recognized that the set temperature has been reached.

  Next, the sixth operation of the present embodiment will be described. The operation means 8 displays the estimated time until the heated body 5 becomes substantially the same as the set temperature by switching the display of the display unit 9 with the temperature display key 16, so that the user can start the next cooking. By recognizing the time, it is possible to start other work and shorten the overall cooking time.

  Next, the seventh action of the present embodiment will be described. After the inverter 3 is stopped, the operation means 8 performs a display for prompting the user's attention on the display unit 9 until the temperature detected by the temperature detection means 12 becomes a predetermined value or less. When the temperature is high, it is possible to call the user's attention by the corresponding display on the display unit 9, and even in other cases, the temperature can be specifically known by displaying the detected temperature. Therefore, it can be used more safely.

  As described above, the induction heating device according to the present invention can display the temperature of a heated object directly or indirectly and can be used conveniently, so that it can be used as an induction heating cooker, such as aluminum. It is also useful as an induction heating device for other devices such as irons, water heaters, humidifiers, etc., for heating high conductivity and low magnetic permeability materials.

The schematic block diagram of the induction heating cooking appliance in Embodiment 1 of this invention Enlarged view of the operating means of the induction heating cooker The figure which shows the example of a display of the display structure part of the conventional induction heating cooking appliance

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Inverter 4 Heating coil 5 To-be-heated body 7 Control means 8 Operation means 9 Display part 10 Sounding part 12 Temperature detection means 15 Temperature setting key 16 Temperature display key

Claims (7)

Includes a heating coil for induction heating the object to be heated placed above, an inverter for supplying high-frequency power to the heating coil, a control means for controlling the output of the inverter, and a display unit for displaying the state of the device And an operation means that communicates with the control means, and a temperature detection means that directly or indirectly detects the temperature of the object to be heated and outputs a detection signal to the control means. The temperature detected by the means is output to the operating means, and the operating means displays the detected temperature. The induction heating apparatus according to claim 1, wherein the operation unit includes a temperature display key, and the operation unit displays a temperature detected by the temperature detection unit when the temperature display key is pressed. The induction heating apparatus according to claim 1, wherein the operation means includes a temperature setting key, and the control means performs suppression control of the inverter output when the object to be heated becomes substantially the same as the temperature setting by the temperature setting key. 4. The induction heating device according to claim 3, wherein the operation means performs a corresponding display on the display unit when the heated object becomes substantially the same as the temperature setting by the temperature setting key. 5. The induction heating apparatus according to claim 4, wherein the operating means includes a ringing portion, and when the object to be heated becomes substantially the same as the temperature setting by the temperature setting key, a notification is given by the ringing portion. The induction heating apparatus according to claim 3, wherein the operation means displays an estimated time until the heated object becomes substantially the same as the temperature setting by the temperature setting key. The induction heating apparatus according to claim 1, wherein the operation unit performs display corresponding to the display unit until the temperature detected by the temperature detection unit becomes a predetermined value or less after the inverter is stopped.

Images