JP7799318B2 - Heating equipment - Google Patents

Description

This invention relates to a portable, multi-purpose heater that can be easily installed anywhere as a heating device for small spaces, and is particularly suitable for installation under the window frame of a glass window.

Traditionally, especially in cold regions, heaters have sometimes been installed under window frames to prevent cold air from entering through glass windows (cold drafts) and condensation.

An example of this type of heating device is an anti-condensation heater. With this heater, by selecting the heater length to match the size of the glass window (window frame width), it is possible to effectively heat the air in the area corresponding to the glass window. In other words, by circulating (rising) the air heated by the heater along the glass surface of the glass window through natural convection, it is possible to prevent condensation from forming on the glass window.

Patent No. 4301752

However, with conventional heating devices, although the heater length can be selected according to the window frame width of the glass window, it is difficult to increase the distance that the heated air must rise (radiate heat) when circulating it through natural convection. This makes it difficult for the heated air to reach high positions on the glass window, which creates the problem of insufficient effectiveness in preventing condensation on the glass window or reducing cold drafts.

The present invention was made in consideration of the above-mentioned problems, and its purpose is to provide a heating appliance that can increase the upward heat dissipation (ascent) distance due to natural convection of heated air, and in particular, can effectively reduce condensation and cold drafts on glass windows.

In order to achieve the above-mentioned object, the heater appliance of the present invention comprises a lower heater section having a lower internal space formed by arranging multiple heater panels, each equipped with a heating element, opposite each other , with the lower surface of the lower internal space serving as an air intake port and the upper surface of the lower internal space serving as a heat dissipation port; an upper heater section having an upper internal space formed by arranging multiple heater panels, each equipped with a heating element, opposite each other , with the upper surface of the upper internal space serving as a heat dissipation port and with an air intake port between the upper heater section and the lower surface of the upper internal space, and arranged above the lower heater section; and a pair of holding members that hold both end portions of the upper heater section and the lower heater section, respectively.

In the heating appliance of the present invention, for example, natural convection due to the chimney effect is further promoted, making it possible for heated air to reach high positions on glass windows that were previously out of reach.

This invention provides a heating appliance that can increase the upward heat dissipation (ascent) distance due to natural convection of heated air, and in particular, can effectively reduce condensation and cold drafts on glass windows.

1 is a perspective view showing the overall structure of a heater appliance according to a first embodiment of the present invention; 1A to 1D show the overall structure of a heater fixture according to a first embodiment, where (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a bottom view. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 2 is a cross-sectional view showing an example of the configuration of an upper panel. 1A is a cross-sectional view showing an example of the configuration of a lower panel, and FIG. 1B is an enlarged view of a portion indicated by Vb in FIG. 1A. FIG. 1 is a circuit diagram of a heater fixture. 1A and 1B are diagrams showing the heat dissipation characteristics of the heater appliance in comparison with a conventional heater appliance, where FIG. 1A is a characteristic diagram of the heater appliance according to the first embodiment, and FIG. 1B is a characteristic diagram of the conventional heater appliance. 10A and 10B show the overall structure of a heater fixture according to a second embodiment of the present invention, in which FIG. 10A is a front view and FIG. 10B is a side view. 10A and 10B are diagrams showing the overall structure of a heater fixture according to a third embodiment of the present invention, in which (a) is a front view and (b) is a side view. 10A and 10B illustrate cross-sectional structures of heater appliances according to other embodiments of the present invention, where (a) is a cross-sectional view of a heater appliance according to a fourth embodiment of the present invention, and (b) is a cross-sectional view of a heater appliance according to a fifth embodiment of the present invention. 10A and 10B illustrate cross-sectional structures of heater appliances according to other embodiments of the present invention, where (a) is a cross-sectional view of a heater appliance according to a sixth embodiment of the present invention, (b) is a cross-sectional view of a heater appliance according to a seventh embodiment of the present invention, (c) is a cross-sectional view of a heater appliance according to an eighth embodiment of the present invention, (d) is a cross-sectional view of a heater appliance according to a ninth embodiment of the present invention, (e) is a cross-sectional view of a heater appliance according to a tenth embodiment of the present invention, and (f) is a cross-sectional view of a heater appliance according to an eleventh embodiment of the present invention. FIG. 23 is a cross-sectional view of a heater fixture according to a twelfth embodiment of the present invention. A cross-sectional view of a heating appliance according to a thirteenth embodiment of the present invention. A cross-sectional view of a heating appliance according to a fourteenth embodiment of the present invention. A cross-sectional view of a heating appliance according to a fifteenth embodiment of the present invention. A cross-sectional view of a heater fixture according to a sixteenth embodiment of the present invention.

Heating fixtures according to embodiments of the present invention will be described below with reference to the drawings.

[First embodiment]
Fig. 1 is a perspective view showing the overall structure of a heating fixture 1 according to a first embodiment of the present invention. Fig. 2(a) is a front view schematically showing the longitudinal direction of the heating fixture 1, Fig. 2(b) is a side view schematically showing the lateral direction of the heating fixture 1, Fig. 2(c) is a top view schematically showing the upper surface of the heating fixture 1, and Fig. 2(d) is a bottom view schematically showing the lower surface of the heating fixture 1.

In this first embodiment, a heater fixture (900 type) 1 with a longitudinal length of 900 mm and a heater fixture (1200 type) 1 with a longitudinal length of 1200 mm will be described as examples.

As shown in Figures 1 and 2(a) to 2(d), this heating device 1 includes a lower heater unit 3, an upper heater unit 5, a pair of holding members 7 that hold both ends of the lower heater unit 3 and the upper heater unit 5, and a power cord 9.

The power cord 9 has a power switch 9b that controls the flow of electricity to the heater (heating element) 41 (described below) to turn the heating appliance 1 on and off, and a power plug 9a that connects to a commercial power outlet (not shown).

Furthermore, in the case of this heating fixture 1, since the longitudinal length is 900 mm or 1200 mm, one fixing member 8 corresponding to the holding member 7 is provided in the middle (intermediate) portion of the lower heater unit 3 and the upper heater unit 5. This fixing member 8 has a through hole corresponding to the configuration of the lower heater unit 3 and the upper heater unit 5 (the arrangement pattern of the heater panels 31, 51). Similarly, the holding member 7 has an insertion groove on its inner surface corresponding to the configuration of the lower heater unit 3 and the upper heater unit 5.

The lower heater section 3 has multiple heater panels 31 arranged facing each other as lower panels, with the lower surface of the lower internal space serving as the first air intake port 2a and the upper surface serving as a heat exhaust port (heat dissipation port).

The upper heater unit 5 is arranged above the lower heater unit 3, with multiple heater panels 51 facing each other as upper panels. The upper surface of the upper internal space serves as a heat exhaust port (heat radiation port) 2b, and an air intake port 2c serves as a second air intake port between the upper heater unit 5 and the lower heater unit 3. The air intake ports 2a, 2c and heat exhaust port 2b are all provided with approximately the same width across the entire width (longitudinal) of the heater fixture 1.

Here, the lower heater section 3 includes three heater panels 31, as shown in FIG. 3, for example. All three heater panels 31 have the same shape, as shown in FIG. 5(a), for example.

In other words, the three heater panels 31 are made of a light metal material such as aluminum, have a hollow section 32, and each heat dissipation surface is concavely curved in a cross section perpendicular to the longitudinal direction. This increases the heat dissipation surface of the three heater panels 31, and also increases the effectiveness of radiant heat.

As shown enlarged in Figure 5(b), grooves 33 are formed on the bottom and top surfaces of the three heater panels 31, for example, into which screws 7a, 8a engage when the panels are attached to the holding member 7 or the fixing member 8. The grooves 33 may have a V-shaped cross section or a U-shaped cross section. By providing the grooves 33 on the bottom and top surfaces of the three heater panels 31, they can be attached without any vertical restrictions.

In the lower heater unit 3, the three heater panels 31 are supported by holding members 7 and fixing members 8, with a predetermined gap (air intake 2a) between them and the floor, which is the installation surface, such as under the window frame, as shown in Figure 3, for example.

Of the three heater panels 31, the two outer panels are arranged so that, for example, to ensure stability during installation, the bottom air intake port 2a side is wider and the top heat exhaust port side is narrower, forming a figure-eight cross section that flares out toward the end. The inner panel is then arranged, for example, to protrude higher than the heat exhaust port formed by the two outer heater panels 31. This makes it possible to take advantage of the temperature difference inside the upper heater section 5 to efficiently draw in air from the air intake ports 2a and 2c, which is useful for utilizing the chimney effect.

In contrast, the upper heater section 5 has two heater panels 51, as shown in FIG. 3, for example. The two heater panels 31 have the same shape, as shown in FIG. 4, for example.

In other words, the two heater panels 51 are made of a light metal material such as aluminum, have a hollow section 52, and are curved so that at least the outer heat dissipation surface is curved inward in a cross section perpendicular to the longitudinal direction. This increases the heat dissipation surface of the two heater panels 51, and also increases the effectiveness of radiant heat.

The two heater panels 51 are arranged opposite each other so that their cross sections form a figure-eight shape that diverges toward the end. The bottom air intake 2c side is wider and the top heat exhaust 2b side is narrower, maximizing the chimney effect. This means that the heat generated in the lower heater section 3 and upper heater section 5 is condensed within the upper internal space of the upper heater section 5, and can be effectively released as natural convection from the heat exhaust 2b at the tip.

In addition, by providing an air intake port 2c along the longitudinal direction between the lower heater section 3 and the upper heater section 5, the amount of air drawn in through the air intake port 2c can be significantly increased, enabling natural convection to occur efficiently. This means that the distance over which heated air dissipates heat (ascents) upward due to natural convection can be significantly increased.

As shown by A, B, and C in Figure 3, for example, in the upper heater section 5, the distance A between the heater panels 51 is preferably about 3 to 10 mm (preferably around 6 mm). Furthermore, the distance B between the heater panels 51 of the upper heater section 5, for example, the heater panel 31 on the inside of the lower heater section 3, is preferably about 2 to 10 mm. Furthermore, the distance C, which forms the air intake 2c, for example, between the heater panel 31 on the outside of the lower heater section 3 and the heater panel 51 of the upper heater section 5, is preferably about 2 to 10 mm.

The holding member 7 and fixing member 8 are made of, for example, thermosetting plastic. An LED (Light Emitting Diode) lamp 6 is provided, for example on the top surface of the holding member 7, which lights up to indicate whether the heating device 1 is heating or off in response to operation of the power switch 9b.

Figure 6 is a circuit diagram showing an example configuration of the electrical circuit section 40 of the heating fixture 1 of this embodiment.

As shown in Figure 6, the electrical circuit section 40 of the heating device 1 has five heaters 41 that serve as heat sources, corresponding to the heater panels 31 of the lower heater section 3 and the heater panels 51 of the upper heater section 5. The heaters 41 are made using silicone rubber cord heaters (silicon heater wire), nichrome wire heaters, carbon fiber wire heaters, etc., and may be linear or planar, as long as they can be stored in a U-shape within the hollow sections 32, 52 of each heater panel 31, 51, for example.

In other words, in the electrical circuit section 40, one power wire of the power cord 9 connects in series three heaters 41 housed in the hollow portion 32 of each heater panel 31 of the lower heater section 3, and also connects in series two heaters 41 housed in the hollow portion 52 of each heater panel 51 of the upper heater section 5. In other words, the five heaters 41 housed in the hollow portions 32, 52 of each heater panel 31, 51 in a U-shaped state are connected to one power wire of the power cord 9 via connection points C1, C2 to form a closed circuit.

The other power line of the power cord 9 is connected to the connection point C1 between the heater 41 housed in the hollow portion 32 of the heater panel 31 of the lower heater unit 3 and the heater 41 housed in the hollow portion 52 of the heater panel 51 of the upper heater unit 5, via the current fuse Fi, the temperature fuse Fd, and the thermostat SS in that order.

A resistor R connected in series with the LED lamp 6 and a diode D facing in the opposite direction are connected in parallel between connection point C1 and connection point C2, which connect the heater 41 housed in the hollow portion 32 of the heater panel 31 of the lower heater section 3 and the heater 41 housed in the hollow portion 52 of the heater panel 51 of the upper heater section 5.

In the electrical circuit unit 40 of this embodiment, when the temperature of the heater 41 exceeds a set temperature (for example, around 60°C), the thermostat SS activates and controls the temperature of the heater 41 to the optimum temperature. If, for example, the temperature of the heater 41 exceeds the set temperature despite this temperature control, the thermal fuse Fd melts and cuts off the power to the heater 41.

By using, for example, a silicone rubber cord heater as the heater 41, its flexibility, electrical insulation, heat resistance, etc. make it easy to store within each hollow section 32, 52, ensuring a high level of safety.

The heater 41 is not limited to being constructed with a single heater wire; for example, it may be constructed such that multiple heater wires are individually housed in each of the hollow portions 32, 52.

Furthermore, it is not necessary to house a heater 41 in each of all heater panels 31, 51; for example, it is possible to omit housing a heater 41 in some of the heater panels 31, 51.

In addition, in this embodiment, the thermal fuse Fd and thermostat SS are placed inside the inner heater panel 31 of the lower heater unit 3, but they can also be placed inside the outer heater panel 31 or the heater panel 51 of the upper heater unit 5.

Figure 7 shows the heat dissipation characteristics of the heater fixture 1 according to this embodiment, compared with a conventional heater fixture. Here, we explain the case where the conventional heater fixture is an anti-condensation heater 100. Note that the applied voltage (V) and power consumption (W) for the heater fixture 1 and the anti-condensation heater 100 were the same, and the resulting heat dissipation area Hd was compared.

As shown in Figure 3(b), in the case of a conventional anti-condensation heater 100, for example, four heater panels 101 were arranged in a straight configuration parallel to the vertical direction perpendicular to the floor surface, so the heat dissipation area Hd (the amount of radiant heat WB, which is the amount of heat dissipated in the short direction, multiplied by the convection height HB, which is the amount of heat dissipated upward) was extremely limited to only the peripheral area of the anti-condensation heater 100.

In contrast, in the case of the heating fixture 1 of this embodiment, as is clear from Figure 1(a), the amount of heat dissipation in the short direction (WA > WB) and upward (HA > HB) can be significantly improved by accelerating natural convection due to the improved chimney effect, making it possible to increase the heat dissipation area Hd.

As described above, the heating fixture 1 according to the first embodiment can improve the upward heat dissipation (ascent) distance due to natural convection of heated air, and in particular can effectively reduce condensation and cold drafts on glass windows.

In other words, the heating fixture 1 according to this embodiment is configured to consist of a lower heater section 3 and an upper heater section 5, with an air intake 2c between them, and the upper heater section 5 positioned above the lower heater section 3. This significantly increases the amount of air drawn in through the air intake 2c, making it possible to efficiently generate natural convection. This significantly increases the distance over which heated air dissipates heat (ascents) upward due to natural convection.

Moreover, each heater panel 51 of the upper heater unit 5 is designed to diverge in an eight-shape, with the lower air intake 2c side wider and the upper heat exhaust 2b side narrower. This maximizes the chimney effect, allowing the heat generated in the lower heater unit 3 and upper heater unit 5 to condense within the upper heater unit 5 and be efficiently released as natural convection from the heat exhaust 2b at the tip. This allows heated air to reach high positions on glass windows that were previously out of reach, effectively reducing condensation and cold drafts on the glass windows.

Second Embodiment
FIG. 8(a) is a front view showing the overall structure of a heating appliance 1 according to a second embodiment of the present invention, and FIG. 8(b) is a side view.

In other words, the heater fixture 1 according to this second embodiment is a heater fixture (600 type) 1 with a longitudinal length of approximately 600 mm, and is the same as the heater fixture 1 according to the first embodiment except that the fixing member 8 is omitted.

The heater fixture 1 according to the second embodiment, which is configured in this manner, achieves substantially the same effects as the heater fixture 1 according to the first embodiment.

[Third embodiment]
9(a) is a front view showing the overall structure of a heating fixture 1 according to a third embodiment of the present invention, and FIG. 9(b) is a side view. In the heating fixture 1 according to the third embodiment, the same or similar reference numerals are used to designate the same parts as those in the heating fixture 1 shown as the first embodiment, and detailed descriptions thereof will be omitted.

In other words, the heater fixture 1 according to the third embodiment is a heater fixture (1500 or 1800 type) 1 with a longitudinal length of approximately 1500 or 1800 mm, and is the same as the heater fixture 1 according to the first embodiment except that two fixing members 8 are provided.

The heater fixture 1 of the third embodiment, which is configured in this manner, achieves substantially the same effects as the heater fixture 1 of the first embodiment.

In the heating fixture 1 according to the first to third embodiments described above, the shape, number, and arrangement pattern of the heater panels 31, 51 of the lower heater section 3 and upper heater section 5 are merely examples and are not limited to the configurations of the first to third embodiments.

The following briefly describes heating appliances according to other embodiments of the present invention. Note that in the heating appliances according to other embodiments, parts that are the same as those in the heating appliance 1 shown as the first embodiment are designated by the same or similar reference numerals, and detailed descriptions will be omitted.

[Fourth and Fifth Embodiments]
That is, in any of the first to third embodiments described above, as shown in FIG. 10( a), the lower heater section 3 may have four heater panels 31, and the four heater panels 31 may be arranged in parallel in a vertical direction perpendicular to the floor surface, forming a straight configuration (fourth embodiment of the present invention).

Also, for example, as shown in Figure 10(b), the lower heater unit 3 may have six heater panels 31, and the six heater panels 31 may be arranged in a straight line parallel to the vertical direction perpendicular to the floor surface (fifth embodiment of the present invention).

Sixth to Eleventh Embodiments
The configuration of the lower heater section 3 and the upper heater section 5 (the arrangement pattern of the heater panels 31, 51) may be other than that of the heater fixture 1 according to the first to fifth embodiments described above, and may also be configured as shown in, for example, Figures 11(a) to 11(f).

That is, in a heating fixture 1 according to a sixth embodiment of the present invention, as shown in FIG. 11(a), the lower heater section 3 and the upper heater section 5 each have two heater panels 31 and 51, respectively, and each heater panel 31, 51 may be curved, with the lower heater section 3 being narrow on the side of the intake port 2a and wide on the side of the exhaust port on the intake port 2c side.

In a heating fixture 1 according to a seventh embodiment of the present invention, as shown in FIG. 11(b), for example, the lower heater section 3 may have three heater panels 31 and the upper heater section 5 may have two heater panels 51, each of which may be linearly shaped, and the lower heater section 3 may be arranged so that the side of the intake port 2a is narrow and the side of the exhaust port on the intake port 2c side is wide.

As shown in Figure 11(c), the heater fixture 1 according to the eighth embodiment of the present invention may have three heater panels 31 in the lower heater section 3 and two heater panels 51 in the upper heater section 5, with each heater panel 31, 51 having a linear shape, and the three heater panels 31 in the lower heater section 3 arranged parallel to the vertical direction perpendicular to the floor surface, forming a straight configuration.

A heating fixture 1 according to the ninth embodiment of the present invention may have, for example, as shown in FIG. 11(d), two heater panels 51 of the upper heater section 5 curved outward, two outer heater panels 31 of the lower heater section 3 also curved outward, and two inner heater panels 31 arranged vertically.

As shown in Figure 11(e), a heater fixture 1 according to a tenth embodiment of the present invention may have four heater panels 31 in the lower heater section 3 and two heater panels 51 in the upper heater section 5, with each heater panel 31, 51 having a linear shape, with the two outer heater panels 31 of the lower heater section 3 arranged in a fan-shaped figure eight, and the two inner heater panels 31 arranged in a straight line parallel to the vertical direction perpendicular to the floor surface.

In a heating fixture 1 according to an eleventh embodiment of the present invention, as shown in FIG. 11(f), for example, the lower heater section 3 may have four heater panels 31 and the upper heater section 5 may have two heater panels 51, each of which may be linearly shaped, and the four heater panels 31 of the lower heater section 3 may be arranged parallel to the vertical direction perpendicular to the floor surface, forming a straight configuration.

[Twelfth embodiment]
FIG. 12 is a cross-sectional view illustrating an example of an arrangement pattern of heater panels 31, 51 in a heating fixture 1 according to a twelfth embodiment of the present invention.

As shown in FIG. 12, the heater fixture 1 according to the twelfth embodiment of the present invention has four heater panels 31, 51 in both the lower heater section 3 and the upper heater section 5, each of which has a linear shape, and the four heater panels 31 in the lower heater section 3 and the four heater panels 51 in the upper heater section 5 are arranged in parallel in a vertical direction perpendicular to the floor surface, forming a straight configuration.

[Thirteenth embodiment]
FIG. 13 is a cross-sectional view illustrating an example of an arrangement pattern of heater panels 31, 51 in a heating fixture 1 according to a thirteenth embodiment of the present invention.

As shown in FIG. 13, the heating fixture 1 according to the thirteenth embodiment of the present invention has four heater panels 31, 51 in both the lower heater section 3 and the upper heater section 5, and each heater panel 31, 51 is curved outward.

[Fourteenth embodiment]
FIG. 14 is a cross-sectional view illustrating an example of an arrangement pattern of heater panels 31, 51 in a heating fixture 1 according to a fourteenth embodiment of the present invention.

In a heating fixture 1 according to a fourteenth embodiment of the present invention, as shown in FIG. 14, the two heater panels 51 of the upper heater section 5 are curved inward. The six heater panels 31 of the lower heater section 3 are linear, and the two outer heater panels 31 of the lower heater section 3 are narrower on the side of the air intake 2a and wider on the side of the heat exhaust port near the air intake 2c. The four inner heater panels 31 are arranged in a straight line, two on each side, vertically aligned in parallel in a direction perpendicular to the floor.

[Fifteenth embodiment]
FIG. 15 is a cross-sectional view illustrating an example of an arrangement pattern of heater panels 31, 51 in a heating fixture 1 according to a fifteenth embodiment of the present invention.

A heating fixture 1 according to a fifteenth embodiment of the present invention may be configured such that the five heater panels 31 of the lower heater section 3 are arranged in a gate-like shape, as shown in FIG. 15, for example.

Sixteenth Embodiment
FIG. 16 is a cross-sectional view illustrating an example of an arrangement pattern of heater panels 31, 51 in a heating fixture 10 according to a sixteenth embodiment of the present invention.

That is, the heating fixture 10 according to the 16th embodiment of the present invention may be configured, for example, by stacking the heating fixtures 1 shown in FIG. 11(c) in a vertical direction perpendicular to the floor surface.

This layered heater fixture 10 can be configured by stacking identical heater fixtures 1 other than the heater fixture 1 shown in Figure 11(c), or it can be configured by stacking the heater fixture 1 shown in Figure 11(c) with a different heater fixture 1.

As described above, the heating fixtures 1 and 10 according to the fourth to sixteenth embodiments provide substantially the same effects as the heating fixture 1 according to the first embodiment.

In other words, the heating appliances according to each embodiment can increase the distance that heat dissipates (rises) upward due to natural convection of heated air, and in particular can effectively reduce condensation and cold drafts on glass windows.

While the present invention has been described in detail using several embodiments, the present invention is not limited to the embodiments described in the specification.

For example, the heater panels 31 of the lower heater unit 3 and the heater panels 51 of the upper heater unit 5 may be straight, trapezoidal, diamond-shaped, concave (curved), or convex (elliptical), and the number of panels and their arrangement pattern can also be freely changed.

Furthermore, the heater appliance may be configured to allow for temperature adjustment and may have a timer function.

In addition to being installed under the window frames of residential glass windows, the heater can be easily transported to any location, preventing condensation in closets and suppressing drafts, and heating small spaces such as dressing rooms, under desks, and kitchens. It can also be used as a multi-purpose heater that provides sufficient heating effect with low energy consumption (e.g., around 90W to 250W).

1, 10 Heating device 2a, 2c Air intake 2b Heat exhaust port (heat radiator)
3 Lower heater section 5 Upper heater section 6 LED lamp 7 Holding member 8 Fixing member 9 Power cord 31 Heater panel (lower panel)
32 hollow portion 33 groove portion 40 electric circuit portion 41 heater (heat generating element)
51 Heater panel (upper panel)
52 Hollow part Hd Heat dissipation area

Claims (8)

a lower heater section having a lower internal space formed by arranging a plurality of heater panels, each having a heating element, facing each other , the lower surface of the lower internal space serving as an air intake port and the upper surface of the lower internal space serving as a heat dissipation port;
an upper-stage internal space formed by arranging a plurality of heater panels, each having a heating element, facing each other, the upper surface of the upper-stage internal space serving as a heat dissipation port, and an upper-stage heater section disposed above the lower-stage heater section, the upper surface of the upper-stage internal space serving as a heat dissipation port and the lower surface of the upper-stage internal space being provided with an air intake port between the upper-stage heater section and the lower-stage heater section;
a pair of holding members that hold both end portions of the upper heater unit and the lower heater unit, respectively;
A heater device characterized by comprising: The heater fixture described in claim 1, characterized in that the multiple heater panels of the lower heater section and the multiple heater panels of the upper heater section have a hollow structure. The heater fixture according to claim 2, characterized in that the plurality of heater panels of the lower heater section and the plurality of heater panels of the upper heater section each have a heating element arranged inside the hollow structure that generates heat when electricity is applied. A heating fixture as described in claim 1 or 2, characterized in that the heat dissipation surfaces of the multiple heater panels of the upper heater section are flat or curved. A heating fixture as described in claim 1 or 2, characterized in that the heat dissipation surfaces of the multiple heater panels of the lower heater section are flat or curved. The heater fixture described in claim 1, characterized in that the multiple heater panels of the lower heater section have grooves formed on their undersides for attaching and fixing to the pair of holding members. The heater fixture described in claim 1, characterized in that the multiple heater panels of the upper heater section are arranged facing each other in a figure-eight shape, with the air intake side being wider and the heat release side being narrower. The heater fixture described in claim 1, characterized in that the multiple heater panels of the lower heater section are arranged facing each other in a figure-eight shape, with the air intake side being wider and the heat release side being narrower.