JP2006325948A - Heating cooker and heater for food and drink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heighten the safety in using a heating cooker, and to achieve power-saving and reduction of cost. <P>SOLUTION: This heating cooker 1 includes: cooking plates 23, 24 for placing material to be cooked such as meat, PTC heating resistors 7, 8 provided on the bottom side of the cooking plates 23, 24; and a power supply part 18 for supplying power to the PTC heating resistors 7, 8 to heat the cooking plates 23, 24. That is, in the heating cooker 1, the cooking plates 23, 24 are heated through the PTC heating resistors 7, 8 having high heating effect, whereby the temperature of the cooking plates 23, 24 can be raised with comparatively small consumption power and in a short time to achieve power saving. Further, the resistance values of the PTC heating resistors 7, 8, are suddenly increased at Curie temperature or higher and with such increase, the current becomes hard to flow, resulting in automatically stopping the temperature rise of the PTC heating resistors 7, 8, whereby a thermostat is not required so that the cost can be reduced and the safety in using the device can be secured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooking device including a hot plate.

  A cooking device such as a hot plate that can easily cook meat and hot cakes in a general household on a cooking plate that is detachably mounted on a cooking device body case containing an electric heater. Is known (see, for example, Patent Document 1).

In this kind of heating cooker, as the electric heater, for example, a so-called sheathed heater in which a pipe containing nichrome wire together with insulating powder for heat conduction is arranged meandering on the bottom side of the cooking plate, etc. Has been applied.
JP 2002-291621 A

  However, the above-described sheathed heater requires a relatively large amount of preheating time, consumes a large amount of power, and is required to be improved in terms of power saving. In addition, since the temperature of the sheathed heater increases without limit when current is continuously supplied, a limiter circuit such as a thermostat is necessary, and there are problems in terms of cost and safety.

  Then, this invention was made | formed in order to solve the said subject, and it aims at provision of the heating cooker which can aim at power saving and cost reduction, and can raise the safety | security at the time of use.

  In order to achieve the above object, a cooking device according to the present invention comprises a cooking plate portion on which a food is placed, a PTC heating resistor provided on the bottom side of the cooking plate portion, and the PTC heating resistor. An electric power supply unit for supplying electric power to the cooking plate unit to heat the cooking plate unit.

  According to the present invention, since the cooking plate portion is configured to be heated through the PTC heating resistor having a high heating effect, the cooking plate portion can be heated to a predetermined temperature with a relatively small power consumption and in a short time. The temperature can be raised to a low level, and power saving is realized. Further, according to the present invention, the resistance value rapidly increases above the Curie temperature of the PTC heating resistor, and accordingly, the current hardly flows, and the temperature rise of the PTC heating resistor itself inevitably stops. Therefore, there is no need to provide a limiter circuit for heat generation such as a thermostat, thereby reducing costs and improving safety when using the device.

  Furthermore, the heating cooker according to the present invention provides the PTC heating resistor with respect to a plurality of locations on the bottom side of the cooking plate portion so that a plurality of heating regions having different temperatures are formed on the surface of the cooking plate portion. The body is divided into a plurality of parts and arranged.

  According to this invention, the heating area for actual cooking, the heating area for heat insulation, and the like can be prepared on the surface of a single cooking plate portion, and the use for one heating cooker is possible. Can be expanded. Here, the cooking plate portion may be configured by a single plate as its component configuration, or may be configured by a plurality of plates that are individual for each heating region. Further, in the present invention, as a configuration for forming a plurality of heating regions having different temperatures, a temperature difference may be provided by changing the amount of power supplied to each of a plurality of PTC heating resistors having the same temperature characteristics. In addition, a plurality of types of PTC heating resistors having different temperature characteristics may be arranged in advance.

  Furthermore, the cooking device of the present invention is a heat generation control that performs variable control of the heating temperature of the entire surface of the cooking plate portion and / or variable control of the heating temperature for each of the plurality of heating regions on the surface of the cooking plate portion. It further has a section.

  According to this invention, the optimal heating temperature can be provided with respect to the target cooking item. Moreover, in this invention, when the temperature control for each of the plurality of heating regions on the surface of the plate portion for cooking is possible, for example, a plurality of types of foods with different cooking temperatures are suitably cooked with one heating cooker. Can do.

  The cooking device of the present invention includes an AC power input interface corresponding to a commercial power source, a DC power input interface corresponding to an automobile battery power, and a DC power input interface corresponding to a rechargeable battery. It is characterized by providing at least one of these.

  In the present invention, not only the use of a heating cooker using a commercial power source in a house, but also from a general passenger car equipped with a DC 12V battery power source, for example, an off-road vehicle equipped with a DC 24V battery power source, etc. Since electric power can be supplied, the cooking device can be used even in an outdoor environment such as a campsite. Here, the AC power supply input interface corresponding to the above-described commercial power supply is not only an interface corresponding to DC100V in Japan, but also a commercial power supply in overseas countries such as DC110V, DC115V, DC120V, DC127V, DC220V, DC230V, DC240V, etc. The interface corresponding to is included. Furthermore, in this invention, if it is a heating cooker provided with the interface for DC power supply input corresponding to a rechargeable battery, it can replace with a commercial power supply, a battery power supply, etc., and can apply a rechargeable battery. Moreover, in this invention, a portable (portable) heating cooker can be provided substantially, and a user's convenience can be improved. Further, in the present invention, the heating cooker may be configured to support all three types of power sources such as a commercial power source, a battery power source, and a rechargeable battery. For example, a heating cooker that is a dedicated machine according to the type of power source, such as a heating cooker with AC100V specification in Japan, a heating cooker with battery power source (for example, DC12V) for automobiles, or a heating cooker with rechargeable battery specification. May be configured individually.

  As described above, according to the present invention, it is possible to provide a cooking device capable of reducing power consumption and reducing costs and improving safety during use.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing a heating cooker according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing this heating cooker, and FIG. 3 is a diagram showing in detail an input operation unit of this heating cooker, FIG. 4 is a block diagram functionally showing the control system of the cooking device.

  As shown in FIG. 1 to FIG. 4, the heating cooker 1 of the present embodiment is a hot plate that can easily perform cooking such as grilled meat in a general household, and serves cooked items such as meat and hot cakes. The cooking plates 23, 24 to be placed, the PTC heating resistors 7, 8 provided on the bottom side of the cooking plates 23, 24, and the PTC heating resistors 7, 8 are supplied with electric power to prepare the cooking plates 23, 24. And a power supply unit 18 for heating the main body.

  Specifically, as shown in FIGS. 1 and 2, the casing portion of the heating cooker 1 is formed of a support case 2. The cooking plates 23 and 24 are detachably mounted on the uppermost part of the support case 2. Electrodes 21 and 22 for supplying electric power (current) are joined to the bottoms of the PTC heating resistors 7 and 8 formed as planar heating elements via leads 21a and 22a, respectively. Further, a pair of insulating films 3 are joined so as to sandwich the PTC heating resistors 7 and 8 to which the electrodes 21 and 22 are joined from both sides. As this insulating film 3, heat resistant resin, such as a polyimide resin, is mentioned, for example.

  An aluminum plate 5 for improving the thermal conductivity is interposed between one insulating film 3 arranged on the upper side and the cooking plates 23 and 24. Further, between the other insulating film 3 disposed on the bottom side and the support case 2, glass wool 9 for suppressing heat dissipation to the bottom side is provided further inside the aluminum plate 6, for example. Is interposed between the two.

Here, the control system of the heating cooker 1 of this embodiment is demonstrated.
That is, as shown in FIG. 3 and FIG. 4, the control system of the heating cooker 1 includes the input operation unit 10 where the user performs an input operation in addition to the above-described power supply unit 18, and PTC heat generation from the power supply unit 18. There is provided a heat generation control unit 12 that controls the heating temperature of the cooking plates 23 and 24 by controlling the supply of electric power to the resistors 7 and 8. In order to be able to supply the commercial power supply 16, the power supply unit 18 is connected to a terminal unit 16 a as an AC power supply input interface corresponding to AC 100V. Furthermore, in order to be able to supply the battery power source 15 for automobiles to the power supply unit 18, a terminal unit 15 a that is a DC power source input interface corresponding to DC 24 V and DC 12 V is provided via the DC-AC inverter 17. It is connected.

  The DC-AC inverter 17 converts the 24V / 12V DC power supplied from the battery power supply 15 side into a 100V AC power supply and supplies it to the power supply unit 18. The voltage setting switching unit 14 connected to the DC-AC inverter 17 selectively converts DC 24V to AC 100V and DC 12V to AC 100V in accordance with an input operation from the user via the input operation unit 10. To run. This configuration is not limited to the use of the commercial power source 16 in the heating cooker's residence, but also power from a general passenger car equipped with a DC 12V battery power source, for example, an off-road vehicle equipped with a DC 24V battery power source. It is to realize the supply of. With this configuration, the cooking device 1 of the present embodiment can be applied as a portable cooking device, and the cooking device 1 can be used even in an outdoor environment such as a campsite. Here, for example, a dedicated connection cable that relays and connects the cigarette lighter socket (DC 12 V / DC 24 V output) on the vehicle side and the terminal portion 15 a of the heating cooker 1 is provided as an accessory of the heating cooker 1. Also good.

Next, the input operation unit 10 shown in detail in FIG. 3 will be described.
As shown in FIG. 3, the input operation unit 10 includes a power switch 10 a that switches ON / OFF of the drive power supplied to the main body of the cooking device 1, and a PTC (located on the right side of FIGS. 1 and 2). Temperature adjustment for mainly adjusting the heating temperature of the cooking plate 23 located above the heating resistor 7 (adjusting the supply of electric power [current] to the PTC heating resistor 7 via the heating controller 12) And a knob 10c. Further, the input operation unit 10 mainly adjusts the heating temperature of the cooking plate 24 located above the PTC heating resistor 8 (arranged on the left side of FIGS. 1 and 2) (via the heating control unit 12). A temperature adjustment knob 10d for adjusting the supply of power [current] to the PTC heating resistor 7 and a split switch 10b for applying predetermined control to the heating temperature adjustment function by the temperature adjustment knobs 10c and 10d. .

  In the state where the above-described split switch 10b is set to OFF, the temperature adjustment function by the temperature adjustment knob 10d is disabled, and by operating the temperature adjustment knob 10c, both the PTC heating resistors 7 and 8 are controlled. Both cooking plates 23, 24 are adjusted to the same temperature. On the other hand, in the state where the division switch 10b is set to ON, the temperature adjustment function by the temperature adjustment knob 10d is effective, and by operating the temperature adjustment knob 10d, only the PTC heating resistor 8 is controlled, and the cooking plate 24 Is adjusted to a specific temperature. Further, in a state where the division switch 10b is set to ON, only the PTC heating resistor 7 is controlled by operating the temperature adjustment knob 10c, and the cooking plate 23 has a unique temperature (relative to the cooking plate 24). Individual temperature).

  Here, for example, by appropriately adjusting the temperature adjustment knobs 10c and 10d, for example, the setting is made such that the cooking plate 24 is kept at, for example, 100 ° C. for heat insulation, and the cooking plate 23 is set at, for example, 200 ° C. for actual cooking. Is possible. In this case, unlike a sheathed heater or the like, by applying a heater using a PTC heating resistor as an electric heater, the power consumption of the entire heating cooker 1 can be suppressed to about 500 W, for example. When the above sheathed heater or the like is applied, for example, a power of about 1200 W + 1200 W may be required, and there is a concern that the breaker may fall when used in a general household.

Next, the structure around the PTC heating resistors 7 and 8 will be described.
The PTC heating resistors 7 and 8 constitute a heating element sheet in the form of being sandwiched between the electrodes 21 and 22 and the upper and lower insulating films 3 described above. In this heating element sheet, electrodes (electrode layers) 21 and 22 are formed in a comb pattern, for example, on one surface (bottom surface in this embodiment) of the PTC heating resistors 7 and 8 using a material such as silver or copper. Further, the PTC heating resistors 7 and 8 and the electrodes 21 and 22 are sandwiched between a pair of insulating films 3 from both sides, and are configured to have a thickness (total thickness) of, for example, 0.01 mm to 2 mm. Examples of the insulating film 3 include heat-resistant materials such as polyimide resin, polyamideimide resin, polyester resin, and glass sheet. Here, the PTC exothermic resistors 7 and 8 are exemplified by a production method for obtaining a print pattern of a desired shape using various printing techniques.

  Moreover, as a material of the PTC heating resistors 7 and 8, a PTC material, that is, a material showing a PTC characteristic at 100 ° C. to 300 ° C. among materials having a positive temperature coefficient of resistance (Positive Temperature Coefficient of Resistance). Is used for example. In the present embodiment, the PTC heating resistors 7 and 8 have the same PTC characteristics. Furthermore, specifically, as conductive particles in the inorganic polymer, nickel, copper, tungsten, titanium, silver, gold, aluminum, activated carbon, carbon black, graphite, tin oxide, indium oxide, vanadium oxide, rhenium oxide, An inorganic polymer-based PTC material in which silicon carbide, titanium nitride, or the like is dispersed is preferably used because a layer having good flexibility can be formed by screen printing. Note that the thickness of the single PTC heating resistors 7 and 8 is, for example, about 5 μm to 1 mm.

  Further, instead of the above-described manufacturing method using printing technology, carbon is mixed in a predetermined resin material or heat-resistant material having PTC characteristics as described above, and this is rolled with a roller or the like, and is first formed into a sheet shape. Then, a PTC heating resistor having a thickness of, for example, about 50 μm to 5 mm may be formed by performing a punching process of cutting the base material into a predetermined shape. When this manufacturing method is adopted, the PTC heating resistor itself also has a function as an electrode. Therefore, the shape of the PTC heating resistor in this case is a surface facing the bottom surface of the cooking plates 23 and 24. The shape etc. which are made to meander along the side etc. are illustrated. Further, at this time, for example, one end portion of the PTC heating resistor arranged meandering serves as a positive electrode, and the other end portion serves as a negative electrode.

  As described above, according to the heating cooker 1 of the present embodiment, the cooking plates 23 and 24 are configured to be heated through the PTC heating resistors 7 and 8 having a high heating effect. The cooking plates 23 and 24 can be heated to a predetermined temperature with low power consumption and in a short time, and power saving can be achieved. Further, in the heating cooker 1 of the present embodiment, the resistance value rapidly increases at a temperature equal to or higher than the Curie temperature of the PTC heating resistors 7 and 8 (the temperature at which the phase transition of the PTC heating resistors 7 and 8 occurs). And the temperature rise of the PTC heating resistors 7 and 8 themselves inevitably stops. Therefore, according to the heating cooker 1 of the present embodiment, the self-temperature control function of the PTC heating resistors 7 and 8 eliminates the need to provide a limiter circuit for heat generation such as a thermostat, thereby reducing the cost. Can be reduced, and safety when using the cooker can be secured.

  Moreover, in the heating cooker 1 of this embodiment, the heating area for actual cooking and the heating area for heat insulation can be prepared on the cooking plates 23 and 24, and with respect to one heating cooker Can be expanded. Furthermore, according to the heating cooker 1 of this embodiment, since the temperature control for each of the cooking plates 23 and 24 is possible, for example, a plurality of types of foods with different cooking temperatures are suitably cooked with a single cooker. can do.

  Although the present invention has been specifically described above with reference to the embodiment, the present invention is not limited to this embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the temperature difference is provided between the cooking plate 23 and the cooking plate 24 by changing the amount of power supplied to each of the plurality of PTC heating resistors having the same PTC characteristics. Instead, a plurality of types of PTC heating resistors having different PTC characteristics (temperature characteristics) may be arranged in advance. Moreover, you may make it interpose a heat insulating material etc. between these plates so that transmission of the temperature between the plate 23 for cooking and the plate 24 for cooking may be reduced. Moreover, in the said embodiment, although the plate part for cooking was comprised by two plates, the plate 23 for cooking, and the plate 24 for cooking, it replaces with this and the plate for cooking by one plate A part may be comprised and a several heating area | region may be provided on this single plate.

  Furthermore, although the heating cooker 1 of the embodiment described above is configured to support all three types of power sources such as AC100V, DC12V, and DC24V, instead of this, the AC100V specification cooking device, DC12V Depending on the type of power source, a cooking device that becomes a dedicated machine, such as a cooking device with a specification or a cooking device with a DC 24V specification, may be configured individually. In this case, the DC-AC inverter 17 and the voltage setting switching unit 14 provided in the heating cooker 1 become unnecessary, and further, the terminal unit 16a for AC power input and the terminal unit for DC power input Any one of 15a becomes unnecessary, and it can aim at the cost reduction in comprising a heating cooker. In the above embodiment, a cooking device such as a hot plate has been exemplified. Of course, by applying the main components of the present invention, hot water is boiled or heated to keep it warm. An apparatus (for example, a water heater) can be easily configured.

The top view which shows the heating cooker which concerns on embodiment of this invention. Sectional drawing which shows the heating cooker of FIG. The figure which shows the input operation part of the heating cooker of FIG. 1 in detail. The block diagram which shows the control system of the heating cooker of FIG. 1 functionally.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Heat cooker, 2 ... Support case, 3 ... Insulating film, 5, 6 ... Aluminum plate, 7, 8 ... PTC heating resistor, 9 ... Glass wool, 10 ... Input operation part, 10a ... Power switch, 10b ... Split switch, 10c, 10d ... Temperature adjustment knob, 12 ... Heat control part, 14 ... Voltage setting switching part, 15 ... Battery power supply, 15a, 16a ... Terminal part, 16 ... Commercial power supply, 17 ... DC-AC inverter, 18 ... Power supply unit, 23, 24 ... cooking plate, 21, 22 ... electrode, 21a, 22a ... lead.

Claims (4)

A plate portion for cooking,
A PTC heating resistor provided on the bottom side of the cooking plate portion;
An electric power supply unit for supplying electric power to the PTC heating resistor to heat the cooking plate unit;
A heating cooker comprising:   The PTC heating resistors are respectively divided into a plurality of locations on the bottom side of the cooking plate portion so that a plurality of heating regions having different temperatures are formed on the surface of the cooking plate portion. The cooking device according to claim 1, wherein the cooking device is a heating cooker.   It further comprises a heat generation control unit that performs variable control of the heating temperature of the entire surface of the cooking plate portion and / or variable control of the heating temperature for each of the plurality of heating regions on the surface of the cooking plate portion. The cooking device according to claim 2.   It comprises at least one of an interface for AC power input corresponding to a commercial power source, an interface for DC power input corresponding to a battery power source of an automobile, and an interface for DC power input corresponding to a rechargeable battery. The cooking device according to any one of claims 1 to 3.

Images