JP2009257712A - Cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve adhesion and heater efficiency by accurately pressing a heat transferring heater to a top plate. <P>SOLUTION: The cooking device is composed such that a periphery of the heater 30 is supported by a heater supporting means provided in a top plate 14 side, and the heat transferring heater 30 is fixed such that it is pressed against the top plate 14 lower face. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cooking device provided with a heat conductive heater on the lower surface of the top plate so as to be cooked via a cooking container placed on the top plate.

  This type of heating cooker has a type in which a heat transfer heater as a heating means is provided as a single structure, or a type in combination with an induction heating coil as another heating means. Due to its characteristics, the adhesiveness with the top plate affects the heating efficiency. Therefore, the heat transfer heater is pressed against the lower surface side of the top plate by using elastic force of a spring member or the like from below (see, for example, Patent Document 1).

  For example, FIG. 5 is a cross-sectional view showing a main part of a conventional structure, which is a view corresponding to FIG. 1 described in the drawing of the above-mentioned Patent Document 1, and more specifically, based on the drawing. 1 is provided with a heat transfer heater 2 made of a mica heater or a heat-generating conductor as a heating means, and an induction heating coil 3 arranged as another heating means below the heating apparatus body (not shown) on the lower surface side of 1. The heat transfer heater 2 and the induction heating coil 3 are integrally attached and fixed to the resin base plate 4 in the main body as a unit structure.

However, the base plate 4 is attached to an appropriate stationary member 5 in the cooker body, and is elastically supported at a plurality of locations via an elastic body 6 made of, for example, a compression coil spring. Thus, the heating unit is elastically supported in a state of being biased upward, and the uppermost heat transfer heater 2 is elastically pressed and in close contact with the lower surface of the top plate 1. A reinforcing plate 7 and a heat insulating member 8 are superimposed on the lower surface side of the heat transfer heater 2.
JP 2007-123159 A (page 4, FIG. 1)

  According to the above configuration, the user can select and use heating means such as the heat transfer heater 2 or the induction heating coil 3 in accordance with the cooking menu. In particular, the heat transfer heater 2 is in close contact with the lower surface of the top plate 1 and the top plate. Heat is efficiently transferred to the upper cooking container 9, and cooking is performed. By the way, in the said structure, in order to improve or maintain the adhesiveness of the heat conductive heater 2, there are some problems.

  For example, the top plate 1 supported on the upper surface of a counter top (not shown) of a kitchen cabinet and the stationary member 5 on the cooker body side incorporating the driving means of the heating means and the like are inherently different in assembly base point. And an error in assembly is likely to occur between the two. In addition, since the support by the elastic body 6 is provided at a plurality of locations, the stationary member 5 serving as a mounting base is not necessarily a single component, but elastic support via the elastic body 6 over other different shaped components. It is also possible to become.

  Therefore, the pressing force to the top plate 1 is likely to be uneven, and it is difficult to press the heating center with high accuracy, and the heater efficiency (heating efficiency) for the cooking container 9 may be reduced. In order to cope with this, in order to further increase the rigidity of the heat transfer heater 2, it is conceivable to increase the elastic force (biasing force) by the elastic body 6 so-called high load. According to this, although some improvement can be expected, this is an increase in weight, and there is concern about a decrease in assembly efficiency and an increase in cost, and it cannot be said that it is a measure for fundamentally solving the above problems.

  An object of the present invention is to provide a cooking device capable of accurately pressing a heat conductive heater against a top plate in order to solve the above-described problems and expecting improvement in adhesion and heater efficiency between the two. To do.

The cooking device of the present invention includes a main body of the cooking device, a top plate provided so as to cover the upper surface of the main body, and a cooking container placed thereon, and is located in the main body and is in contact with the lower surface of the top plate. A heat transfer heater,
The heat transfer heater is supported and fixed by a heater support means provided on the top plate side so as to support the periphery of the heat transfer heater and press against the lower surface of the top plate. 1 invention).

  According to the above means, since the heat transfer heater is supported and fixed by the heater support means provided on the top plate side, the influence of the assembly error between the top plate and the heat transfer heater can be suppressed to a very small level. That is, it is possible to reliably and easily obtain better adhesion between the top plate and the heat conductive heater. Further, since the heater support means supports the periphery of the heat transfer heater and presses it against the lower surface of the top plate, the heater support means can be pressed uniformly and accurately, and thus the heater efficiency can be improved. It is possible to provide a cooking device that can be expected to have a practical effect.

Hereinafter, a so-called built-in type embodiment in which the cooking device of the present invention is incorporated in a system kitchen will be described with reference to FIGS. 1 to 4.
First, based on the external perspective view of the built-in configuration shown in FIG. 4, the cooking device 12 incorporated in the kitchen cabinet 11 includes a cooking device main body 13 (part of the heating device and its driving device described later). And a top plate 14 mounted so as to close the upper surface of the main body 13. Among them, the top plate 14 is made of transparent heat-resistant tempered glass and is opaque, and on the upper surface thereof is placed a circular frame line suitable for placing and heating a cooking container (not shown) such as a pan, For example, the heating parts 15 and 16 are formed by printing and displaying at two places. In addition, an intake port 17 and an exhaust port 18 for outside air are provided at the rear. The intake / exhaust ports 17 and 18 serve as inlets and outlets for cooling air by a cooling fan (not shown) in order to cool exothermic electronic components provided in the main body 13 and heating coils described later.

  On the other hand, the cooking device main body 13 is a driving means for driving and controlling a heating means, which will be described later, such as an inverter circuit board having an IGBT or the like, and a control circuit mainly composed of a microcomputer, in a case forming a rectangular box-shaped outline, In addition, the cooling fan and the like (both not shown) are incorporated.

  The cooking device 12 having such a configuration is incorporated by means of a well-known drop (commonly referred to as a drop-in method) as means for incorporating into the kitchen cabinet 11. That is, the main body 13 is dropped into the opening provided in the countertop 11a and is fixedly mounted. The top plate 14 is configured such that its outer peripheral edge is supported on the countertop 11a. An operation unit 19 for setting cooking conditions and the like and a roaster unit 20 that can be taken in and out are provided on the front side of the main body 13 and can be operated from the front of the kitchen cabinet 11 at all times.

  On the other hand, FIG. 2 is an enlarged plan view of the main part showing the heating unit 16 side in FIG. 4 and a plan view of the top plate 14 seen through from above for convenience of explanation of the configuration. Yes. 1 is a sectional view taken along the line AA shown in FIG. 2 and partially expanded, and FIG. 3 is an enlarged sectional view taken along the line BB shown in FIG. Hereinafter, description will be made based on FIGS. Since the other heating unit 15 is substantially the same as the configuration described below, the description on the heating unit 16 side is omitted.

  First, a metal lower frame 21 is attached and fixed to the lower surface of the top plate 14 via an adhesive 22 over the entire circumference. The lower frame 21 has a rectangular frame shape that is open so as to cut out the inner portion and has a frame shape on the periphery. As shown in FIG. 4, the outer peripheral edge of the top plate 14 is on the counter top 11a. While being supported, the top plate 14 reinforces the main plate 13 and connects the main plate 13 and the top plate 14 (not shown).

  Further, in the present embodiment, the lower frame 21 is formed with a plurality of fixing members 23 extending integrally on the inner side of the lower frame 21. The fixing member 23 functionally fixes a heater support, which will be described later, and constitutes a heater support means. Here, only the fixing member 23 will be described. As shown in FIGS. 1 and 2, the fixing member 23 extends inward along the lower surface of the top plate 14 from two locations on the right side of the lower frame 21, both of which are attached to the top plate 14 with an adhesive 24. A top plate fixing portion 23a to be attached and fixed, and a heater support fixing portion 23b having a U-shaped cross section projecting downward from the extended end portion and having a screw hole at the top portion.

  Such two front and rear (upper and lower) fixing members 23 and 23 extend from the lower frame 21 and are formed symmetrically at symmetrical positions in the front-rear direction. One fixing member 25 is provided. That is, the other fixing member 25 is disposed on the opposite side of the two fixing members 23 and 23, and is particularly fixedly attached to the top plate 14 via the adhesive 26 as shown in the sectional view of FIG. A top plate fixing member 25a and a heater support fixing member 25b having a U-shaped cross section at the center and protruding downward and having a screw hole at the top. As described above, in this embodiment, the fixing members 23, 23, and 25 are provided at three locations around the periphery, and the fixing member 25 arranged on the center side of the fixing members 23, 23, and 25 is independently formed to save the material of the lower frame 21. However, the fixing member 25 can also be formed to extend from the lower frame 21, or depending on the shape, it is possible to adopt a configuration in which two fixing members 23 are simply arranged at symmetrical positions. .

  An annular heater support 27 is attached and fixed to the three heater support fixing portions 23b, 23b, and 25b by screws 28. The heater support 27 supports and fixes a heater unit, which will be described later. The heater support 27 is formed of a metal material having a low magnetic permeability such as copper or aluminum and a material having a high thermal conductivity, and is formed in a frame shape that is continuously connected in an annular shape. is doing. However, mounting pieces 27b and 27b and mounting pieces 27c having different shapes are projected outwardly at three locations on the outer peripheral side of the annular frame portion 27a, bent and raised downward, and fixed to the heater support. It has a shape corresponding to the screw 28 that is overlapped with each of the portions 23b, 23b, and 25b.

  On the other hand, on the inner peripheral side of the annular frame portion 27a of the heater support 27, claw portions 27d project from a plurality of locations (for example, 7 locations). The claw portion 27d supports the heater unit from the back when the attachment pieces 27b, 27b, 27c are screwed to the heater support fixing portions 23b, 23b, 25b to attach a heater unit to be described later. The details are described later (especially, refer to FIG. 1).

  Here, a specific configuration of the heater unit 29 shown in the present embodiment will be described. In particular, as shown in FIG. 1, the heater unit 29 has a configuration in which a heat transfer heater 30, a reinforcing plate 31, and a heat insulating material 32 are stacked in order from the side in contact with and in close contact with the lower surface of the top plate 14. While having a substantially circular plate shape with through holes, the diameter is slightly different as shown in FIG. Among them, the heat transfer heater 30 may be a known mica heater or a heat generating conductor such as a conventional flat heater as a heating means, or may be configured such that a ribbon heater is wound around the outer periphery of the insulating substrate. The closer it is to the lower surface of the plate, the easier it is to transfer heat to the object to be cooked via the cooking container placed on the upper surface of the top plate 14, that is, the heater efficiency (heating efficiency) is improved.

  However, since the heat transfer heater 30 itself has a relatively flexible structure, the reinforcement plate 31 is made of a ceramic having rigidity and is reinforced with respect to the heater 30. This reinforcement is effective for pressing the entire heat conductive heater 30 and bringing the entire surface into close contact with the top plate 14 side. Therefore, it can be said that this reinforcing plate 31 and the heat transfer heater 30 constitute a heater unit. However, in the present embodiment, the cooker is provided with an induction heating coil 33 as another heating means, which will be described below, so that it is shielded from the heat transfer heater 30 side in order to cut off the heat. A heat insulating material 32 is assigned to the lower surface of the reinforcing plate 31, so that they are collectively supported and fixed by the heater support 27, and the heater unit 29 referred to in this embodiment is configured. is doing.

  The heater unit 29 is attached by fixing the heater support 27 to the heater support fixing portion 23b as described above, so that the claw portions 27d provided at the seven locations around the peripheral portion on the lower surface side of the heat insulating material 32 are provided. The heater unit 29 is supported and fixed so as to press the heater unit 29 toward the top plate 14 side.

  Thus, the heating coil 33 described above is provided as another heating means corresponding to the heating portion 16 (see FIG. 4) of the top plate 14 at a position slightly below the heater unit 29. As is well known, when a high-frequency current is supplied to the heating coil 33 via an inverter control circuit or the like, an eddy current can be induced in a cooking container such as a pot (not shown) to heat the object to be heated. To do.

  The heating coil 33 is a copper wire coil wound in a circular shape and supported by a base plate 34 made of heat-resistant resin. The base plate 34 has a plurality of leg portions 34a using an appropriate stationary member 35 that is in the main body 13 and is a casing for arranging driving means such as an inverter circuit board, a control circuit, and other electrical components. It is attached and fixed via. Thus, an annular heater support 27 is arranged in the vicinity of the upper part on the outer peripheral side of the heating coil 33.

  As shown in FIGS. 1 and 2, in order to detect the heating temperature of the heat transfer heater 30, a plurality of (for example, four) temperature sensors 36 made of, for example, a thermistor are provided. Each of these temperature sensors 36 is disposed in the vicinity of the outside of the heat transfer heater 30, and is incorporated in a state in which the heat sensitive portion at the tip thereof is in contact with the heater support 27. Specifically, arc-shaped pressing portions 27e projecting inward from the annular frame portion 27a portion of the heater support 27 are formed at four locations as portions where the heat-sensitive portion abuts.

  As shown in the drawing, the pressing portion 27e is close to the lower surface of the top plate 14 and extends in substantially the same plane as the heat transfer heater 30, and the outer peripheral edge of the heat transfer heater 30 is The notch shape is formed along the arc shape that is the tip of the pressing portion 27e, and the positional relationship close to each other at the arc portion is long. In addition, the arc-shaped notch shape in these four places is formed also in the reinforcing plate 31 and the heat insulating material 32 which comprise the heater unit 29, and, thereby, on the pressing part 27e of the form entrapped in the heat-transfer heater 30 side. On the other hand, the temperature sensor 36 can be easily incorporated.

  As a means for bringing the temperature sensor 36 into contact with the pressing portion 27e of the heater support 27, for example, a coil spring 38 is incorporated in the sensor support plate 37 shown in FIG. What is necessary is just to make it the structure which press-contacts the front-end | tip part (heat-sensitive part). The sensor support plate 37 may be configured to extend integrally from the heater support 27, or may be configured to use an appropriate stationary member on the main body 13 side. Thus, by performing temperature detection at four locations, the heating balance of the heat transfer heater 30 can be confirmed. For example, when the detection temperature varies greatly, the degree of adhesion of the heat transfer heater 30 to the top plate 14 is not uniform. As a result, it is possible to take immediate action to correct this.

  1 and 2 is substantially the same as the configuration corresponding to the heating unit 15 in FIG. 4 as described above. Moreover, the heating cooker 12 of the present embodiment is provided with a heat transfer heater 30 and a heating coil 33 as two heating means for one heating unit 16. This heating means can be selected and executed by the user himself, or it is equipped with a known material determination means for cooking containers, and is automatically switched and selected to perform cooking by appropriate heating means. I can do it. In addition, a temperature sensor (not shown) that controls the temperature of the cooking vessel that receives the heating action from the heating coil 33 is provided in contact with the lower surface of the top plate 14 in the central space of the heating coil 33. .

Next, the operation of the cooking device configured as described above will be described.
A cooking container such as a pan containing the object to be heated is placed on a predetermined position of the top plate 14, in this embodiment, on the heating unit 16 side, and a necessary input operation is performed on the operation unit 19 to start. In this case, if it is determined that the material is a high-resistance metal material in the case of the heating cooker 12 provided with the material determining means for the cooking container as described above, the heating coil 33 is based on the normal input power. Induction heating cooking is performed.

  If the material is not a high-resistance metal material, it is determined whether it is a low-resistance non-magnetic metal material such as aluminum, copper, or non-magnetic SUS, or a non-metal material (or no load) such as a clay pot. . And if it is a low resistance metal material, the induction heating cooking by the heating coil 33 is performed based on the preset thermal power adjustment so that the repulsion operation that the bottom of the cooking container floats from the top plate 14 does not occur. In this case, when the heating power adjusted by the thermal power becomes smaller than the normal input power set value, the heater by the heat transfer heater 30 can be performed using the power difference.

  On the other hand, when the material is a non-metallic material, the heater is heated only by the heat conductive heater 30. Hereinafter, the heater heating will be described in detail. In the heater heating by the heat conductive heater 30, when the cooking container is not prepared on the top plate 14 and started in an unloaded erroneous state, or for some reason, the cooking container is used. It is assumed that is greatly deviated from the heating unit 16 indicating the appropriate position. However, in a normal use state, the amount of heat generated from the heat transfer heater 30 is satisfactorily transmitted to the placed cooking container, and is controlled to a predetermined temperature or lower that is lower than the heat resistance temperature of the top plate 14 or the heat transfer heater 30. On the other hand, in the case of the above-described no load, the heat transfer heater 30 generates heat abnormally, and the heater 30 itself may be damaged as the temperature rises rapidly.

  However, in this embodiment, the temperature sensors 36 arranged at four locations detect the temperature rise due to abnormal heat generation of the heat transfer heater 30 at an early stage, and upon receipt of this detection signal, a control circuit (not shown) turns off the energization circuit. It is possible to notify the user by notifying the abnormality. The temperature sensor 36 indirectly detects the heating temperature of the heat transfer heater 30 through the flat pressing portion 27 e of the heater support 27. In this case, the arc portion at the front end of the pressing portion 27e is disposed so as to bite into the arc portion of the same shape cut out at the peripheral edge portion of the heat transfer heater 30, so as to surround the heater unit 29. The heater support 27 quickly absorbs the heat generated from the heat transfer heater 30 based on the structure such as the support and fixing by the annular frame portion 27a and the claw portion 27d extending in seven places, and the pressing portion 27e It reacts quickly to the temperature rise of the heat transfer heater 30.

  In addition, the heater support 27 is made of a material having high thermal conductivity such as copper or aluminum, and further enhances sensitivity to temperature detection. Further, it is possible to predict an abnormal location and an abnormal factor based on position information where an abnormal temperature is detected among the temperature sensors 36 arranged at four locations, which is also effective for subsequent inspection work.

The heater efficiency (heating efficiency) of the heat transfer heater 30 is particularly influenced by whether or not the heater 30 is uniformly adhered to the entire bottom surface of the top plate 14, and this is applied to the cooking container on the top plate 14. It is determined whether heat transfer is performed well.
However, the heat transfer heater 30 is fixed as a heater unit 29 via heater support means provided on the top plate 14 side. That is, in order to improve the adhesion of the heat transfer heater 30 to the top plate 14, it is important that the assembly base point of the heater support means is provided on the top plate 14 side in order to reduce the error in assembly. is there.

  Therefore, in this embodiment, the heater support means is composed of three fixing members 23, 23, 25 and a heater support 27, and the fixing members 23, 23, 25 are attached to the top plate 14 with adhesives 24, 24, 26. The heater support 27 is attached by screws 28 using the fixing member 23, so that the heater unit 29 and thus the heat transfer heater 30 are attached to the top plate via the heater support 27 (claw portion 27d). 14 and fixed so as to be pressed against.

  Such a structure has a fixed member 23 for reasons such as difficulty in drilling and screwing the heat-resistant glass material of the top plate 14, and making the heater unit 29 (heat conductive heater 30) removable. 23 and 25 are completely fixed by adhesives 24, 24, and 26, and the heater support 27 is detachably fixed to the screw 28, and the heater unit 29 is pressed and supported against the top plate 14 side. It is configured.

  In addition, it is desirable that the fixing members 23, 23, and 25 have a relatively large mechanical strength so as to support the weight of the heater unit 29 and the heater support 27 and to obtain a strong heater support means. However, since the two fixing members 23, 23 out of the three portions are configured to extend integrally from the metal lower frame 21 that reinforces the top plate 14, it is easy to obtain a desired strength. In addition, the remaining one fixing member 25 can easily have a desired strength in terms of design as a single component.

  The heater support 27 is configured to have an annular frame portion 27a under the rigid heater support means as described above, and a plurality (seven locations) of claw portions protruding inward from the frame portion 27a. By supporting the periphery of the heater unit 29 (heat conductive heater 30) positioned inward by the 27d, the pressing force to the top plate 14 side can be made uniform. Can be maintained for a long period of time.

  In this case, the reinforcing plate 31 can be applied to the lower surface of the heat transfer heater 30 to increase the rigidity of the heater 30 as a whole. Therefore, the heat transfer heater 30 has a relatively flexible structure, or heat generated during heat generation. Even in a configuration in which thermal deformation is likely to occur due to expansion or the like, this is supported from the lower surface side to suppress deformation, and it is effective to apply a uniform pressing force to the top plate 14, and the entire heat transfer heater 30 is Effective for close contact.

  Moreover, since the heat insulating material 32 is provided on the lower surface side of the heat transfer heater 30 in the present embodiment, the radiant heat downward from the heater 30 can be blocked, and particularly the heating coil 33 that dislikes the thermal load, A heat-generating switching element such as an IGBT of an inverter circuit, and thus a rise in temperature inside the main body 13 can be suppressed, and desired performance can be maintained or the life of various components can be maintained for a long time.

  On the other hand, in the case where the heating coil 33 that performs induction heating is provided like the heating cooker 12 of the present embodiment, the magnetic field lines are likely to leak outward from the heating coil 33, so that conventionally, a magnetic shield ring is provided around the outer periphery of the heating coil. It is set as the structure which provided. On the other hand, in this embodiment, the heater support 27 constituting the heater support means is made of copper or aluminum having a low magnetic permeability, and is formed in an annular shape as a whole, and is disposed in the vicinity of the upper part on the outer peripheral side of the heating coil 33. Since it is configured, the heater support 27 can be used to obtain a function as a magnetic shielding ring that can reduce noise, radio wave interference, etc., so that the number of parts and the number of assembly steps can be reduced, and a compact configuration can be achieved. Is also advantageous.

As described above, according to the present embodiment, the following effects can be obtained.
The heat transfer heater 30 is a heater support having a fixing unit 23, 23, 25 fixed to the top plate 14 as a heater unit 29, and a heater support 27 fixed to this and supporting the periphery of the heater unit 29 on the other end side. By means of the configuration, it is configured to be supported and fixed so as to be pressed against the lower surface of the top plate 14.

  As a result, the heat transfer heater 30 that is required to adhere to the top plate 14 is supported and fixed by the heater support means provided on the top plate 14 side, so that the heat transfer heater 30 is interposed between the top plate 14 and the heat transfer heater 30. On the other hand, the influence of the assembly error can be suppressed to an extremely small level, which can be easily obtained with certainty that the adhesion between the top plate 14 and the heat transfer heater 30 is good. Further, the heater support means supports the periphery of the heater unit 29, and hence the periphery of the heat transfer heater 30, and presses it against the lower surface of the top plate 14. Therefore, the heater support means can be pressed uniformly and accurately, and extended. Can provide a cooking device that can be expected to have practical effects such as increased heater efficiency.

  The heater support means is composed of the fixing members 23, 23, and 25 that are attached and fixed to the top plate 14 by adhesion, and the heater support 27 that supports the heat transfer heater 30. The heater support means can be securely attached and fixed, and the heat transfer heater 30 can be attached and detached via the heater support 27 and can be easily supported and fixed.

  In addition, since the heater support 27 is formed in a substantially annular shape, the substantially disk-shaped heat transfer heater 30 can be supported from the periphery, and adhesion to the entire surface of the top plate 14 and uniform pressing force can be obtained. More effective. Specifically, since the heater unit 29 is supported by the plurality of claw portions 27d protruding inward from the annular frame portion 27a of the heater support 27, the uniform pressing is performed with a simple configuration. Not only can the action be obtained, but the plurality of claw portions 27d can be arranged as close as possible within the range where they are not in direct contact with the heat transfer heater 30, and the heat absorption action of the heater support 27 is improved. As a result, the heating temperature of the heat transfer heater 30 is increased. On the other hand, the temperature detection indirectly performed via the heater support 27 can increase the sensitivity detection by the temperature sensor 36 and can be put to practical use.

  However, in this embodiment, since the heating coil 33 is provided below, the heat insulating material 32 is provided to block heat radiation to the coil 33 and the like. In this case, the heat transfer heater 30 and the reinforcing plate 31 constitute a heater unit 29, and the support by the claw portion 27d is closer to the heat transfer heater 30, which further improves the temperature detection performance. I can expect. Further, the arc portion of the pressing portion 27e to which the temperature sensor 36 is pressed is disposed adjacently so as to bite into the notched arc portion of the outer periphery of the heat transfer heater 30. This is an advantageous configuration for increasing sensitivity. It is.

  Further, two of the three fixing members 23 and 23 constituting the heater support means are provided almost all around the lower surface of the top plate 14 and use a lower frame 21 that reinforces the top plate 14. And formed integrally. Therefore, it is possible to integrally form the fixing members 23 and 23 having good strength while suppressing an increase in the number of parts and the number of assembly steps. This is advantageous in that the heater support means including the heater support 27 can be provided in a solid configuration, and the heat transfer heater 30 is securely supported and fixed for a long period of time with good adhesion.

  In addition, in this embodiment, the heater support 27 is made of a metal having high thermal conductivity, for example, copper or aluminum, so that it reacts quickly to a sudden temperature change of the heat transfer heater 30 and the temperature sensor 36 detects the temperature. Although this is an indirect temperature detection, a preferable temperature range can be set relatively freely as a detection temperature. Furthermore, since the temperature sensors 36 are arranged at four locations around the heat transfer heater 30, the variation in the detected temperature based on the abnormal temperature, thermal deformation, etc. at the multiple locations of the heater 30 is measured, and the abnormal state is indicated. In addition to detection, it is possible to expect the effect that the countermeasures can be taken easily and quickly.

Further, a reinforcing plate 31 made of a non-metallic material and rigid between the heat conductive heater 30 and the heater support 27.
Therefore, the heat transfer heater 30 itself effectively acts to press the heater 30 against the top plate 14 with high accuracy regardless of the configuration in which the heat transfer heater 30 is flexible or easily deformed. Moreover, since the outer periphery of the reinforcing plate 31 constituting the heater unit 29 is supported by the plurality of claw portions 27d, the entire surface of the heat transfer heater 30 is in close contact and suitable for obtaining a uniform pressing force. Effective heating cooking can be expected by increasing the heater efficiency (thermal efficiency).

  On the other hand, in the heating cooker 12 provided with the induction heating coil 33 below the heat conductive heater 30 as in the present embodiment, the heat insulating material 32 is provided on the lower surface side of the reinforcing plate 31. Thereby, since both heating means can be thermally shielded and the inside of the heating coil 33 and the main body 13 by the heat conductive heater 30 can be heated to avoid high temperature, the performance and heat resistance of various control components can be maintained for a long time. .

Further, if magnetic field lines leak from the heating coil 33 to the outside, noise or radio wave interference may occur. However, the annular heater support 27 disposed in the vicinity of the upper outside of the heating coil 33 has a low magnetic permeability such as copper or aluminum. By forming the material in an annular shape, the increase in the number of parts can be suppressed, and the generation of noise and the like can be reduced by absorbing magnetic lines and exhibiting a magnetic shielding effect, thereby maintaining stable performance.

  The present invention is not limited to the embodiment described above and shown in the drawings. For example, a heat transfer heater constitutes a heater unit together with a reinforcing plate and is supported and fixed by a heater support. In the case of a configuration having sufficient rigidity, it is a matter of course that a configuration in which a single heat conductive heater is supported and fixed may be used. Further, the lower frame only needs to be arranged at least around the lower surface of the top plate. For example, the lower frame can be variously developed such as a configuration in which the outer peripheral edge is extended to cover the peripheral edge of the top plate. In addition, the cooking device can be applied to both a built-in type and a stationary type, and various modifications can be made without departing from the scope of the present invention.

Sectional drawing which was in one Example which shows the heating cooker of this invention, and was cut | disconnected along the AA line shown in FIG. Top view of essential parts showing top plate seen through from above Sectional drawing which expands and shows along the BB line shown in FIG. External perspective view showing built-in type cooking device Sectional view of the main part showing a conventional example

Explanation of symbols

  In the drawing, 12 is a heating cooker, 13 is a main body, 14 is a top plate, 15 and 16 are heating parts, 21 is a lower frame, 23 and 25 are fixing members, 27 is a heater support, 27d is a claw part, 29 heater unit , 30 is a heat transfer heater, 31 is a reinforcing plate, 32 is a heat insulating material, 33 is a heating coil, and 36 is a temperature sensor.

Claims (10)

The main body of the cooker,
A top plate which is provided so as to cover the upper surface of the main body and on which a cooking container is placed;
A heat transfer heater located in the main body and in contact with the lower surface of the top plate;
With
The heat transfer heater is supported by a heater support means provided on the top plate side and supported and fixed so as to be pressed against the lower surface of the top plate while supporting the periphery of the heat transfer heater. .   The heating cooker according to claim 1, wherein the heater support means comprises a fixing member attached and fixed to the top plate and a heater support for supporting the heat transfer heater.   The cooking device according to claim 2, wherein the fixing member of the heater supporting means is formed integrally with at least a lower frame provided around the lower surface of the top plate.   The cooking device according to claim 2, further comprising a temperature sensor for detecting a heating temperature of the heat transfer heater, wherein the temperature sensing portion of the temperature sensor is in contact with the heater support.   The heating cooker according to claim 4, wherein the heater support is made of a metal having a high thermal conductivity.   The heating cooker according to any one of claims 2 to 5, wherein the heater support is formed in a substantially annular shape. The cooking device according to claim 6, wherein a non-metallic and rigid reinforcing plate is interposed between the heat transfer heater and the heater support. The cooking device according to claim 7, wherein the heater support has a plurality of claw portions for supporting the outer periphery of the reinforcing plate. The heating cooker according to claim 8, wherein a heat insulating material is provided on the lower surface side of the reinforcing plate in the case where the induction heating coil is provided below the heat transfer heater. The heating cooker according to claim 9, wherein the heater support is formed in an annular shape from a material having low magnetic permeability.

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