JP2009285038A - Heating device and heater sensor unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily control temperature by effectively transmitting heat of a surface heater to a heating panel, efficiently heating the heating panel, and accurately measuring the temperature of the rear surface of the heating panel. <P>SOLUTION: A first electric insulating sheet 11, the surface heater 5, a second electric insulating sheet 12, a temperature sensor 16, and a third electric insulating sheet 19 are layered in this order to compose a heater sensor unit 20 (Fig.(c)). The heater sensor unit 20 is closely attached to the rear surface 2a side of the heating panel 1 fixed to a rigid frame 22, and presser plates 25 of such a shape and size as to divide the rear surface 2a side of the heating panel 1 in the vertical and cross directions are disposed (Figs.(a) and (b)). Rigid beams 28 are laid in the rigid frame 22, and a spring 29 is interposed between each rigid beam and the presser plate 25. All the presser plates 25 and 25 are pressed to the heater sensor unit 20 side (the heating panel 1 side) to compose the heating device 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heating device capable of efficiently transferring the heat of a surface heater to a heating means to heat an object, and a heater / sensor unit optimal for the heating device. The heating device is mainly assumed to be a cooking grill using a heating target as a food, but can also be applied to a molding die having a heating target as a mold product.

  In the teppanyaki (table) used at restaurants such as okonomiyaki, gas heating has been the mainstream. However, air conditioning loss due to ventilation of gas combustion exhaust gas, air conditioning load due to exhaust heat of gas The increase problem has been closed up, and teppanyaki is being switched to the electric heating method. There are an electric heater and an IH method as an electric heating method, but an electric heater is selected from the viewpoint of cost. In addition, a sheathed heater type has been conventionally used as an electric heater, but there are problems in terms of rapid heating and heater durability, and a heating method using a planar heating element has been proposed.

  In this case, the adhesion of the heating element to the object to be heated is an important item in terms of thermal efficiency, durability of the heater, and durability of the insulating material.

  In particular, if the close contact between the iron plate, which is a non-heated material, and the electric heater is secured, the heat of the heater moves to the iron plate. However, when the adhesion between the iron plate and the electric heater is poor, temperature unevenness occurs in each member due to heat transfer, and thermal deformation occurs. When a metal plate is used for the heater, the coefficient of thermal expansion is relatively large, so the amount of thermal deformation is large, and it is often difficult to ensure adhesion over a wide area.

Therefore, in order to ensure adhesion, a strip-shaped heater pressing plate divided into a fraction of the entire area of the planar heater is fixed to a heating flat plate (iron plate), and the planar heater is pressed against the heating flat plate. A heating device has been proposed (Patent Document 1). In this case, the heater pressure plate is 1/3 to 1/5 of the total area of the planar heater, and the heater pressure plate is made of a tough material such as stainless steel and aluminum clad material and heat to make the temperature uniform. A material with high conductivity is used.
JP-A-7-184788 JP-A-8-66318

  In the conventional technique, since the heater pressing plate is 1/3 to 1/5 of the entire area of the planar heater, only the longitudinal edge of each heater pressing plate is bent and divided only in the longitudinal direction. Due to the structure, the adhesion performance between the iron plate and the surface heater could not be sufficiently achieved. Also. Since a material having high thermal conductivity is used for the press plate, there is a problem that the heat of the heater is absorbed by the press plate and the iron plate is not sufficiently heated. Furthermore, since a metal pressing plate is used, there is a problem in that adhesion cannot be ensured due to large thermal deformation.

  In addition, since the conventional heating device using a heating plate uses a thermocouple as a temperature sensor, it is necessary to make a hole in the heating plate and fill the thermocouple to reduce the thickness of the entire heating device. There is also a problem that the processing of the heating plate is complicated and the replacement of the temperature sensor is difficult.

  However, in the present invention, a temperature sensor is arranged between the back surface of the heating means and the surface heater, and the back surface of the heating means is partitioned vertically and horizontally, and each section is made of a material having rigidity and little thermal deformation. Since the heating device is configured by pressing with a pressing plate, the above-mentioned problems have been solved.

That is, the invention of the heating device is characterized in that the “surface heater” is arranged on the back side of the “heating means” for heating the object on the surface, and is configured to satisfy the following conditions: It is.
(1) A “temperature sensor” is disposed between the back surface of the “heating means” and the “surface heater” while maintaining electrical insulation.
(2) The back side of the “heating means” is divided so as to be divided in the vertical direction and the horizontal direction, and a “pressing plate” is arranged for each divided division. The “pressing plate” is made of a material having rigidity and little thermal deformation.
(4) One surface of each “pressing plate” is brought into close contact with the “surface heater”.
(5) A “pressing means” for pressing the other surface of each “pressing plate” to the surface heater side is attached to the back side of the “heating means”.

In addition, the invention of another heating apparatus is characterized in that a “surface heater” is arranged on the back side of the “heating means” for heating the object on the surface, and the following conditions are satisfied. It is a heating device.
(1) “Heater / sensor unit” is formed by stacking and integrating the “first electrical insulation sheet”, “surface heater”, “second electrical insulation sheet”, “temperature sensor”, and “third electrical insulation sheet” in this order. .
(2) The “heater / sensor unit” is placed in close contact with the back side of the “heating plate”, and the back side of the “heating means” and the “third electrical insulating sheet” are brought into close contact with each other.
(3) The back side of the “heating means” is divided so as to be partitioned in the vertical direction and the horizontal direction, and a “holding plate” is arranged for each of the divided sections. The “pressing plate” is made of a material having rigidity and little thermal deformation.
(4) One surface of each “holding plate” is disposed on the first electrical insulating sheet side of the “heater / sensor unit”.
(5) A “pressing means” for pressing the other surface of each “pressing plate” to the surface heater side is attached to the back side of the “heating plate”.

  Further, in each of the heating devices, a “rigid frame” is attached around the “heating means”, each “pressing plate” is disposed in the “rigid frame”, and the “pressing means” is arranged in the “rigid frame”. A “support beam” is detachably mounted on the “support beam”, and a “spring” that presses the “press plate” toward the heating plate is attached to the “support beam”.

  Further, the invention of the heater / sensor unit is formed by arranging and laminating “first electric insulation sheet” and “second electric insulation sheet” on both sides of the “surface heater” to form the “heater unit”. “Temperature sensor” is arranged on the surface of the second electrical insulation sheet, and “Third electrical insulation sheet” is laminated on the “second electrical insulation sheet” so as to cover the temperature sensor. This is a heater / sensor unit. Further, in the above, a heater / sensor unit is characterized in that the “surface heater” is configured by bending a belt-like base material on a plane, and the “temperature sensor” is configured by a pure nickel wire.

The above-mentioned “material having rigidity and low thermal deformation” refers to a ceramic material such as a ceramic tile, for example, and “low thermal deformation means, for example, a linear expansion coefficient of 3 to 11 × 10 ⁻⁶ / A material of about ° C is preferred.

  In the heating device of the present invention, a temperature sensor is disposed between the back surface of the heating means and the surface heater while maintaining electrical insulation, and the surface heater side is divided into vertical and horizontal directions so that the heat is divided. Since a pressing plate made of a material with little deformation is arranged and pressed, there is an effect that the heat of the surface heater is effectively transmitted to the heating means and can be efficiently heated. In addition, since the temperature sensor is also pressed against the back surface of the heating means, the temperature of the back surface of the heating means can be accurately measured to easily control the temperature of the heating means. Therefore, the object to be heated by the heating device can be processed at the optimum temperature, the cooking grill can cook and keep effective food, and the molding die such as resin has the effect of heating the die at the optimum temperature. .

  In addition, when a heater / sensor unit is formed by laminating a surface heater and a temperature sensor by sandwiching them between electrical insulation sheets, it is easy to handle, manufacture heating devices, replace heating means, surface heaters and temperature sensors. There is an effect that the maintenance of the electrical system can be easily and easily performed. In particular, when it is applied to a cooking grill as a heating device, in the event of a failure, a normal heater / sensor unit can be replaced and installed, and the failed heater / sensor unit can be repaired in the meantime. There is an effect that the heating device can be used without any trouble.

(1) The object can be heated on the surface 2 side of the heating plate 1 by heating with the surface heater 5 from the back surface 2a side of the heating plate (heating means) 1. For example, when a heating object is used as a food, the heating plate 1 indicates an iron plate, a stone, or the like arranged horizontally. Moreover, in a resin molding formwork, a heating target object is a resin molding product, and the heating plate 1 becomes the formwork.

  The heating plate 1 is fixed to the upper surface side 23 of the rigid frame 22. The heater / sensor unit 20 is configured by laminating and integrating the first electrical insulation sheet 11, the surface heater 5, the second electrical insulation sheet 12, the temperature sensor 16, and the third electrical insulation sheet 19 in this order.

  A heater / sensor unit 20 is disposed in close contact with the back surface 2 a side of the heating plate 1. At this time, the third electrical insulating sheet 19 comes into close contact with the back surface 2 a of the heating plate 1. Therefore, the temperature sensor 16 and the surface heater 5 are positioned in this order on the back surface 2a of the heating plate 1 (FIG. 2).

  The back surface 2a side of the heating plate 1 is divided so as to be divided in the vertical direction and the horizontal direction, and the holding plate 25 having the divided size is formed. The pressing plate 25 is made of, for example, a ceramic material (a material having rigidity and a little thermal deformation).

  On the back surface 2a side of the heating plate (the lower surface side 24 of the rigid frame 22), the heater / sensor unit 20 is disposed so as to cover the pressing plates 25, 25 with the one surface 26 side of the pressing plate 25 being applied. Accordingly, the one surface 26 of the pressing plate 25 comes into contact with the first electrical insulating sheet 11 of the heater / sensor unit 20.

  A rigid beam 28 is installed on the lower surface 24 of the rigid frame 22, and a spring 29 is interposed between the rigid beam 28 and the other surface 26a of the retainer plate 25 so that all the retainer plates 25 and 25 are heated. Press toward the sensor unit 20 side (heating plate 1 side). As a result, both the temperature sensor 16 and the surface heater 5 can be in close contact with the back surface 1a of the heating plate 1 in a state in which an electrically insulating state is ensured.

  A temperature controller (microcomputer) that can control the energization of the surface heater 5 based on the measurement result from the temperature sensor is provided in advance, and the heating device 30 is configured (FIG. 1).

(2) The surface heater 5 is formed of a metal foil (for example, stainless steel) in a ribbon shape, bent and folded in a single stroke so that there is no contact, and heats the back surface 2a of the heating plate 1 with as little gap as possible. Arrange as possible (FIG. 6).

(3) As the temperature sensor 16, a pure nickel wire is optimal. The nickel wire is arranged so as to cover the entire surface of the heating plate 1 on the back surface 2a side as uniformly as possible. The resistance change rate of the nickel wire is about 0.004 to 0.005 / ° C for pure nickel. The temperature change is measured from the change in resistance value at both ends, and the temperature is controlled in advance. Adjust the section. Further, since the specific resistance is measured, it is desirable to arrange the nickel wire as thin and long as possible. Therefore, the nickel wire is folded and arranged in a single stroke so as not to contact (FIG. 6). In the temperature control unit, a circuit for converting the resistance value of the nickel wire into a voltage is incorporated and taken in as a change in voltage value, and temperature control such as PID is performed.

  Further, in order not to directly measure the temperature of the surface heater 5, when it is arranged between the surface heaters 5 as much as possible and overlaps the surface heater 5 on a plane (electrically, the second electrical insulating sheet 12 is electrically connected). Since the surface heater 5 and the temperature sensor 16 are electrically insulated from each other), the length at which the temperature sensor overlaps the surface heater 5 is set to be as short as possible. For example, it arrange | positions so that it may cross | intersect in the direction orthogonal to the length direction of the surface heater 5 (FIG. 6).

(3) The shape and size of the pressure plate 25 are small and sufficiently small as compared to the heating plate 1 that is a heated member of the surface heater 5, the initial flatness of the pressure plate 25, and the size of the curved surface accompanying thermal deformation. By using the plate 25, the followability of the back surface 2a of the heating plate 1 is good. This is particularly effective when the back surface 2a of the heating plate 1 is a curved surface. Even if the heating plate 1 is not a curved surface, the heating plate 1 is slightly deformed and curved in whole or in part.

  Further, the press plate 25 is made of a material having high rigidity, high flatness, small deformation displacement, and a low coefficient of thermal expansion, so that the adhesion during heating can be secured in a wide range.

  Usually, since the heating plate 1 changes to about 25 ° C. at room temperature and 250 ° C. during heating, a large heat change is also expected. Therefore, following the heat change, the surface heater 5 and the temperature sensor 16 are connected to the heating plate. 1 is required to be in close contact with the back surface 2a.

  When the rigidity of the pressing plate 25 is increased, the force accompanying thermal deformation increases (proportional to the rigidity), and therefore the pressing spring 29 needs to be able to exert a force that can overcome this thermal deformation. In addition, a certain degree of rigidity is necessary for the close contact. If the rigidity is increased, the thermal deformation force increases and a stronger spring is required.

  When ceramic tiles are used as described above, (1) The followability to the curved surface is greatly improved by using a sufficiently small pressing plate for the curved surface R of the deformation of the heated member. ) Uniformly press with high flatness, presser plate 25 is a material (tile = ceramics) with little deformation (a member with low coefficient of thermal expansion and high rigidity), is mass-produced, and is a tile that emphasizes flatness Therefore, the flatness is high. By making the size sufficiently small with respect to the curved surface of the iron plate, high adhesion can be secured within the surface of this tile, but each tile is pressed with a separate spring (one or more locations per plate) High adhesion can be secured.

  In general, ceramic tiles are optimal because each one is manufactured with a high flat surface, apart from tiles with special shapes.

(4) As the electrical insulation sheets 11, 12, and 19, the electrical insulation is ensured and the heat is not cut off (the surface heater 5 and the temperature sensor 16 are brought into close thermal contact with the back surface 2a of the heating plate 1 as much as possible. ) It is necessary to configure. For example, an artificial mica = mica (natural mica) piece hardened and formed into a sheet or tape shape is optimal.

  Embodiments of the present invention will be described with reference to the drawings. This embodiment relates to a cooking heating apparatus that uses a heating target as a food.

[1] Heating plate 1

  The heating plate 1 is an iron plate that heats from the back surface 2a and cooks the ingredients placed on the front surface 2, and is formed with a thickness of about 9 mm, for example. The heating plate 1 is not limited to iron, but can be formed of other metals such as stainless steel or copper, or stone (not shown).

[2] Structure of heater / sensor unit 20

(1) The surface heater 5 is a strip of stainless steel foil (thickness of about 0.05 mm) and is arranged in a bent shape on a plane (FIG. 2). At this time, in order to reduce the amount of deformation in the length direction, it is bent so that the linear distance is as short as possible, and the back surface 2a of the heating plate 1 is covered with as little gap as possible in a single stroke. It is formed by bending on a plane.

  The electrical insulating sheets 11, 12, and 19 are constructed of artificial mica sheets formed by laminating mica pieces into a sheet shape. The first and second electrical insulating sheets 11 and 12 are configured with a thickness of, for example, about 0.3 mm, and the third electrical insulating sheet 19 is configured with a thickness of, for example, about 0.1 mm.

  One surface 6 of the surface heater 5 is sandwiched between the first electrical insulating sheet 11 (protects the surface heater 5 from the pressing plate 25) and the other surface 6a is sandwiched between the second electrical insulating sheet 12 (electrically insulated from the temperature sensor 16), The heater unit 14 is configured (FIG. 2). The heater unit 14 is formed in a shape and size that can be accommodated on the back surface 2a of the heating plate 1 to be used and cover the entire back surface 2a.

(2) A nickel wire sensor is used as the temperature sensor 16. The nickel wire sensor uses a material having a circular cross section of about 0.1φ to 0.14φ of pure nickel. In this case, since the nickel wire sensor measures the temperature from the relationship of the specific resistance value of the metal, it is desirable to use the nickel wire sensor in a state where the cross-sectional area is made as small as possible to easily measure the change in the resistance value. Moreover, if the disconnection in manufacture or use is taken into consideration, the thicker one is better and the above-mentioned diameter is adopted. In addition, as long as the temperature resistance change can be measured, the cross-sectional shape is not limited to a linear shape with a circular cross section, and a foil shape (ribbon shape) can also be used.

(3) The temperature sensor 16 is disposed on the second electrical insulating sheet 12 side of the heater unit 14. It is desirable to arrange the temperature sensor 16 in the gap between the temperature sensors 16 so that the temperature sensor 16 does not overlap with the surface heater 5 as much as possible. Further, the temperature sensor 16 may be disposed so as to intersect at right angles to the length direction of the surface heater 5 when traversing the surface heater 5 so as to minimize the overlap with the surface heater 5. desirable. Further, since the temperature sensor 16 measures the temperature of the heating plate 1, it is arranged as uniformly as possible on the entire back surface 2a of the heating plate 1 (the entire surface of the second electrical insulating sheet 12), and the surface heater 5 as much as possible. Arrange them so that they do not overlap.

  A tape-shaped third electrical insulation sheet 19 is disposed along the length direction of the temperature sensor 16, and the third electrical insulation sheet 19 is attached and fixed to the second electrical insulation sheet 12.

  The temperature sensor 16 and the second electrical insulation sheet 19 are attached to the heater unit 14, that is, the first electrical insulation sheet 11, the surface heater 5, the second electrical insulation sheet 12, the temperature sensor 16, and the third electrical insulation sheet 19. The heater / sensor unit 20 is configured by sequentially stacking and integrating (FIG. 2).

  Terminals are attached to the edges 7 and 8 of the surface heater 5 of the heater unit 14, and terminals are also attached to the edges 17 and 18 of the temperature sensor 16, and information from each terminal is a temperature control circuit (not shown). ).

[3] Presser plate 25

  The pressing plate 25 is made of a square ceramic product having a thickness of about 5 mm and a square of 100 to 150 mm. For example, ceramic tile materials are used. The presser plate 25 is preferably formed as small as possible and as thick as possible in consideration of adhesion to the heater / sensor unit 20 and resistance to cracking.

[4] Heating device 30

(1) A belt-like rigid frame 22 orthogonal to the heating plate 1 is fixed around the heating plate 1, and the heating plate 1 is positioned on the upper surface side 23 of the rigid frame 22.

  The heater / sensor unit 20 is disposed in close contact with the rear surface 2a of the heating plate 1 on the lower surface side 24 (the rear surface 2a side of the heating plate 1) of the rigid frame 1. At this time, the third electrical insulating sheet of the heater / sensor unit 20 is disposed. 19 (temperature sensor 16) comes into close contact with the back surface 2a of the heating plate 1, and the first electrical insulating sheet 11 is exposed.

(2) The pressing plates 25 and 25 are spread on the surface of the first electric insulating sheet 11 of the heater / sensor unit 20 (the back surface 2a side of the heating plate 1). In this case, six heating plates 1 are used in the horizontal direction (longitudinal direction) and four in the vertical direction (short direction), for a total of 24 pieces (FIGS. 1A and 1B). One surface 26 of the pressing plate 25 is in close contact with the first electrical insulating sheet.

  In addition, a spacer 27 made of a material that is heat resistant to the heating of the surface heater 5 and has some elasticity is disposed between the outer periphery of the holding plates 25 and 25 and the rigid frame 22 (FIG. 1 ( c)).

(3) Further, a predetermined distance is provided from the other surface 26a of the pressing plate 25, and the rigid beams 28, 28 are provided between the longitudinal edges 22a, 22a of the rigid frame 22 (parallel to the lateral edges 22b). Secure the installation. In this case, the four pressing plates 25, 25 arranged in the vertical direction have the rigid beam 22 positioned above the center of gravity, and the rigid beam 22 is fixed to the inner surface of the lower surface side 24 of the rigid frame 22. It is detachably attached to the mounting bracket 32 with bolts and nuts (FIG. 1C).

  Further, four spring springs 29 and 29 are fixed on the side of the pressing plate 25 of the rigid beam 22, and the spring springs 29 and 29 press the center of gravity of the pressing plates 25 and 25 to press the pressing plates 25 and 25. Press to the heater / sensor unit 20 side (heating plate 1 side). Therefore, the temperature sensor 16 and the surface heater 5 are pressed and adhered to the back surface 2a of the heating plate 1 (FIG. 1 (c)).

(4) The heating device 30 is configured as described above (FIG. 1). When the surface heater 5 is actually turned on and the heating plate 1 is heated, the temperature of the surface 2 of the heating plate 1 is measured, and the temperature control circuit is set so that the temperature data measured by the temperature sensor 16 match. By adjusting, the set temperature of the operation panel (not shown) and the actual temperature of the heating plate 1 are substantially matched.

[5] Other embodiments

(1) In the above embodiment, the heater / sensor unit 20 forms the third electrical insulation sheet 19 in a tape shape and arranges it along the temperature sensor 16, but the first and second electrical insulation sheets 11, 12 and A similar sheet-like shape can also be used (FIG. 3).

  Moreover, in the said Example, although the heater unit 14 was comprised previously and the temperature sensor 16 and the 3rd electrical insulation sheet 19 were attached to this, the 1st electrical insulation sheet 11, the surface heater 5, the 2nd electrical insulation sheet 12 were attached. Alternatively, the temperature sensor 16 and the third electrical insulating sheet 19 can be laminated in order to form the heater / sensor unit 20 at a time (without forming the heater unit 14 once) (FIG. 3).

  Moreover, in the said Example, although comprised from the artificial mica which laminated | stacked the mica as the electrical insulation sheets 11, 12, and 19 and formed in the sheet form, if it has electrical insulation and abrasion resistance and can be formed in a thin sheet form, Other materials can also be employed (not shown).

(2) Moreover, in the said Example, since the temperature resistance change was measured using the pure nickel wire as the temperature sensor 16, since the temperature of the whole back surface 2a of the heating plate 1 can be measured easily, it is desirable. However, other temperature sensors can be used (not shown).

(3) In the above embodiment, the vicinity of the center of gravity of the pressing plate 25 is pressed by the spring spring 29. However, the rigid beam 22 is arranged between the pressing plates 25 and 25, and two or four by one spring spring. The two pressing plates 25, 25 can also be pressed (FIG. 4A). Further, instead of the spring spring 29, a plate spring 33 can be used (FIG. 4 (b)). If the pressing plate 25 can be pressed, the pressing means can be constituted by other means using compressed air or the like. Yes (not shown).

(4) Moreover, in the said Example, although the circumference | surroundings of the heating plate 1 were fixed to the rigid frame 22, the heating plate 1 can also be attached to the rigid frame 22 easily (not shown). In this case, after cooking, the cooking plate 1 can be detached from the rigid frame 22 and attached to the rigid frame again after washing and drying.

(5) Moreover, in the said Example, although the heater sensor unit 20 of the magnitude | size which covers the back surface 2a of the heating plate 1 with one sheet was used, the back surface 2a of the heating plate 1 is divided into two or more pieces, or Three or more heater / sensor units 20, 20 may be used in parallel (not shown). In this case, the single heating plate 1 can be used by setting different temperatures for each partitioned portion. Therefore, especially in the case of the heating device 30 for business use, a part of the heating plate 1 having a large area is used for heating cooking at a high temperature, and the other part of the adjacent heating plate 1 is kept at a low temperature. Is effective.

(6) Moreover, in the said Example, although the pressing board 25 was made into square, it can also be set as other shapes, such as a rectangle. For example, as a triangle (FIG. 5 (a)) and an H-shape (FIG. 5 (b)), the gap between the pressing plates 25 and 25 is also arranged as small as possible.

In the heating device of the present invention, (a) is a plan view, (b) is a bottom view, and (c) is a partially enlarged cross-sectional view taken along line AA. In the heater / sensor unit of the present invention, (a) is an assembly view, and (b) is a plan view. It is also an assembly drawing of another heater / sensor unit. (A) (b) is a longitudinal cross-sectional view of the other press means of this invention. (A) (b) is a top view of the other pressing board of this invention. It is a bottom view which shows the example of arrangement | positioning of a surface heater and a temperature sensor.

Explanation of symbols

1 Heating plate (heating means)
2 Heating plate front surface 2a Heating plate back surface 3 Heating plate periphery 5 Surface heater 6 Surface heater 1 surface 6a Surface heater other surface 7 One end of surface heater 7a Surface heater other end 11 First electrical insulating sheet 12 Second electrical Insulating sheet 14 Heater unit 16 Temperature sensor 17 Temperature sensor one end 18 Temperature sensor other end 19 Third electrical insulating sheet 20 Heater sensor unit 22 Rigid frame 22a Rigid frame edge (longitudinal direction)
22b Rigid frame edge (short direction)
23 Top side of rigid frame (heating plate side)
24 Underside of rigid frame (presser plate side)
25 Presser plate 26 One surface 26a of the presser plate 27 Other surface of the presser plate 27 Spacer 28 Rigid beam (pressing means)
29 Spring spring (pressing means)
30 Heating device 32 Mounting bracket (Pressing means)
22 Leaf spring (pressing means)

Claims (5)

A heating apparatus comprising a “surface heater” disposed on the back side of a “heating means” for heating an object on the surface, and configured to satisfy the following conditions.
(1) A “temperature sensor” is disposed between the back surface of the “heating means” and the “surface heater” while maintaining electrical insulation.
(2) The back side of the “heating means” is divided so as to be divided in the vertical direction and the horizontal direction, and a “pressing plate” is arranged for each divided division. The “pressing plate” is made of a material having rigidity and little thermal deformation.
(4) One surface of each “pressing plate” is brought into close contact with the “surface heater”.
(5) A “pressing means” for pressing the other surface of each “pressing plate” to the surface heater side is attached to the back side of the “heating means”. A heating apparatus comprising a “surface heater” disposed on the back side of a “heating means” for heating an object on the surface, and configured to satisfy the following conditions.
(1) “Heater / sensor unit” is formed by stacking and integrating the “first electrical insulation sheet”, “surface heater”, “second electrical insulation sheet”, “temperature sensor”, and “third electrical insulation sheet” in this order. .
(2) The “heater / sensor unit” is placed in close contact with the back side of the “heating plate”, and the back side of the “heating means” and the “third electrical insulating sheet” are brought into close contact with each other.
(3) The back side of the “heating means” is divided so as to be partitioned in the vertical direction and the horizontal direction, and a “holding plate” is arranged for each of the divided sections. The “pressing plate” is made of a material having rigidity and little thermal deformation.
(4) One surface of each “holding plate” is disposed on the first electrical insulating sheet side of the “heater / sensor unit”.
(5) A “pressing means” for pressing the other surface of each “pressing plate” to the surface heater side is attached to the back side of the “heating plate”.   A "rigid frame" is attached around the "heating means", each "pressing plate" is placed in the "rigid frame", and the "pressing means" and the "support beam" are detachable in the "rigid frame" The heating apparatus according to claim 1, wherein a “spring” is attached to the “support beam” to press the “pressing plate” toward the heating plate. A “heater unit” is formed by arranging and stacking a “first electrical insulation sheet” and a “second electrical insulation sheet” on both sides of the “surface heater”.
A “temperature sensor” is disposed on the surface of the second electrical insulation sheet of the “heater unit”, and a “third electrical insulation sheet” is laminated on the “second electrical insulation sheet” so as to cover the temperature sensor. Heater / sensor unit characterized by being configured as above. 5. The heater / sensor unit according to claim 4, wherein the "surface heater" is constituted by bending a belt-like base material on a plane, and the "temperature sensor" is constituted by a pure nickel wire.

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