JPS6331360Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a heater used as a heat source for heating appliances such as kotatsu and foot warmers.

FIG. 21 shows a heater for a kotatsu that was proposed as the basis of this idea. That is, this heater is constructed by fixing the bent ends of the reflector B and the heat sink C to the bottom plate A, which is the outer shell, with screws D, and fixing the cord heater E to the back surface of the heat sink C with a stopper F. This provides a heater with a high height, which has the effect of reducing the bulk of the kotatsu body and making the temperature distribution within the kotatsu body uniform.

However, with this heater, the heat of the heat sink C heated by the cord heater E is transferred from the bent end to the bottom plate A.
It has the disadvantage that it can run away due to contact with the base plate A, and it is necessary to bend the end part in order to attach it to the bottom plate A.

Therefore, the object of this invention is to provide a heater which avoids heat loss and whose parts are easily machined.

A kotatsu to which a first embodiment of this invention is applied is shown in FIGS. 1 to 9. That is, in this kotatsu, a heater 2 is installed at the bottom of a main body 1, a grating 3 is placed over the heater 2, a stile 4 is hung on the upper opening of the main body 1, and a leg holder 4a is attached to one opposing inner surface on the stile 4. A tower 5 is installed, a futon 6 is placed on the tower 5, and a top plate 7 is placed on the tower 5. Then, the main body 1 is placed in mortar on a block (or brick) 9 under the floor 8, the upper end is hung on the floor plate 11 by an angle 10, and the upper surface of the stile 4 is folded so that it is flush with the floor plate 12. In addition, the tower 5 has a notch (not shown) in which the leg holder 4a passes through the opposite outer surface of the lower end, and by changing the direction of the tower 5 (rotating it by 90 degrees), the tower 5 can be inserted into the main body 1. It is stored under the floor when not in use. 14 is the ground, 15 is the joist, 16 is the large rope, 17 is the bundle, and 18 is the bundle stone.

The heater 2 has a rectangular flat plate shape as a whole, and its outer shell consists of a metal bottom plate 19 and a net-like cover 20 covering the bottom plate 19, as shown in FIG. Inside is a bottom plate 1
A reflective plate 22 is placed on the reflective plate 9 via a spacer 21 which is an example of a pipe made of a thermally poor conductor.
A heat dissipation plate 24 is placed on the bottom plate 19 through a spacer 23 which is made of the same material as the above-mentioned pipe.
A cord heater 26 as a heat source is wired to the lower surface of the heat sink 24, and a stopper 27 is spot welded to secure it.

As shown in FIG. 5, the cord heater 26 is constructed by winding a nichrome wire 29 around a glass fiber body 28, wrapping the surface of the nichrome wire 29 in four layers with glass fibers 30a to 30d, covering this with a glass fiber braid 31, and then using a metal pipe 32.
The wires are wired on the heat sink 24 in an M-shape at equal intervals. Then, connect the lead wires 33 and 34 to both ends of the cord heater 26, connect the thermoswitch 35 and the fuse 37 of the fuse holder 36, connect it to the power cord 38, and connect the power cord 38 to the bush 39.
It is pulled out to the outside via the.

The heat sink 24 is made of aluminum, stainless steel, copper, etc., and non-ferrous metals are particularly preferred. In addition, the surface is subjected to blackening treatment (alumite treatment for aluminum, other plating, etc.).

In this hokotatsu heater 2, when the power cord 38 is connected to the power source, the nichrome wire 29 of the heater 2 generates heat, heats the heat sink 24, and radiates heat from the surface of the heat sink 24 into the main body 1 through radiant heat and convection heat. At the same time, the downward radiant heat of the heat sink 24 is reflected by the reflection plate 22 and heats the heat sink 24.
The air between the reflector 22 and the reflector 22 is heated to cause convection as shown in FIG. The temperature is controlled by a thermoswitch 35. The temperature distribution above the heat dissipation plate 24 due to such a heat dissipation effect becomes uniform in all directions as shown in FIG. 8 (the curve is indicated by S).

With this configuration, this heating heater has the following effects. In other words, (1) The entire heater is made into a thin flat plate shape and heat is radiated from the entire surface, so it is possible to heat evenly in all directions, and since it does not take up as much height as an infrared lamp, it can be directly attached to the bottom of the kotatsu body. There is no need to install a heater box, making construction easier.

(2) Since the heater 2 heats through the heat sink 24, the temperature of the cord heater 26 can be averaged, and since the heat sink 24 covers the cord heater 26, which is a high-temperature heat generating section, there is less risk of fire caused by dust, etc. There is also less damage and damage caused by water.

(3) The cord heater 26 can be easily wired in an M-shape at equal intervals with respect to the heat sink 24, and this wiring allows the cord length to be short and the heat sink
4 can be efficiently and uniformly heated, and the causes of damage can be reduced.

(4) Since the heat dissipation surface of the heat dissipation plate 24 is blackened, radiant heat is increased and the heating effect is high.

(5) The bottom plate 19 which is not related to heating due to the reflector plate 22
This prevents heat from heating up and can be used effectively as heating heat, reducing heat loss and increasing efficiency, contributing to energy savings.

(6) The heat sink 24 and the reflector 22 are connected to the spacer 21,
23, the heat from the heat sink 24 is transferred to the bottom plate 1.
Further, there is no need to bend the heat dissipating plate 24 and the reflecting plate 22 as in the conventional case.

In addition, as shown in FIGS. 10 and 11,
When a large number of convection holes 40 are formed in the heat sink 24',
The heating effect due to convection through the holes 40 becomes significant. Moreover, as shown in FIGS. 12 and 13,
If the heat dissipation holes 41 are also formed in the reflecting plate 22' at positions shifted from the convection holes 40, the heating effect by convection heat can be further improved.

A second embodiment of this invention is shown in Figures 14 to 2.
Shown in Figure 0. That is, this heater has a low heat cord heater 42 and a medium heat cord heater 43, which are heat sources, arranged in an M-shape in parallel and spaced at equal intervals, and a U-shaped support rod that intersects the wiring in the transverse direction. 4
A cord receiving cutout 45 is formed at the intersection of the webs 4 to support the cord heaters 42, 43, and the support rod 44 and the heat sink 24 are made of a thermally poor conductor such as mica, fiber, or resin. ，
47, and a heat insulating packing 48 made of the same material is interposed between them, and the reflecting plate 22 is also sandwiched between similar heat insulating washers 49 and 50, with a heat insulating packing 48' interposed therebetween,
Spacers 51 and 5 using heat insulating packing made of the same material between the bottom plate 19, the reflection plate 22 and the heat sink 24
It is fixed to the bottom at the same time with two interposed bolts 53. 54 is a spring washer. Also, the through holes 24a, 22a of the heat dissipation plate 24 and the reflection plate 22
is larger than the packings 48, 48' to form a gap to absorb thermal expansion.

The electrical wiring for the cord heaters 42 and 43 is configured as a circuit as shown in FIG.
Heat generation is controlled only by the cord heater 43 for medium heat, or by controlling both cord heaters 43 for high heat. The rest of the structure is the same as that of the first embodiment.

Because this heater is configured in this way,
In addition to having the same effects as the first embodiment, there are also the following effects. That is, (1) Since the two types of cord heaters 42 and 43 for low heat and high heat are wired in parallel in an M-shape, temperature control is possible, and even if they generate heat individually or at the same time, there is no need to use a heat sink. Can be heated evenly and efficiently. Even more even heat distribution can be obtained by spacing the heaters evenly.

(2) Since the cord heaters 42 and 43 are supported by the support rod 44 which has a housing notch 45 formed at the cord intersection position on the side, the cord heaters 42 and 43 can be installed very easily, and M which has an effect on uniform heating can be avoided. It is possible to prevent variations in the shape of the wires from product to product, and since it has a reinforcing effect on the heat sink 24, thermal deformation of the heat sink 24 can be suppressed.

(3) Since the heat dissipation plate 24, support rod 44, and reflection plate 22 are simultaneously attached to the bottom plate 19 using the packing and washer, which are thermally poor conductors, and bolts, the ease of assembly is significantly improved, and the Since heat transfer can be suppressed, heat loss can be reduced. Further, since gaps are formed between the heat sink 24, the reflection plate 22, the support rod 44, and the packing, thermal expansion of these can be absorbed and warping can be prevented.

As described above, the heater of this invention includes an outer shell, a spacer made of a thermally poor conductor arranged on the outer shell, a heat sink installed on the spacer, and a heat sink of the heat sink. Since it includes a heat source attached to the back side and a reflecting plate installed between the heat source and the outer shell at an intermediate position of the spacer and having a reflective surface facing the heat sink, the following effects are achieved. be.

In other words, since the outer shell and the heat source are separated by a spacer and a reflector is interposed, the spacer prevents heat from escaping to the outer shell due to heat transfer, and the reflector blocks radiant heat to the outer shell. Therefore, heat loss due to heat escaping from the heat source to the outer shell can be prevented, and the heat sink can be effectively heated. Furthermore, the process for installing the heat sink becomes easier than in the past.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a horigotatsu to which the first embodiment of this invention is applied, Fig. 2 is a side view of its heater,
Figure 3 is a cross-sectional view, Figure 4 is a plan view with the heater cover removed, Figure 5 is a cutaway perspective view of the cord heater, Figure 6 is a partial cross-sectional view of the heat sink, and Figure 7 is the mounting section. 8 is an explanatory diagram showing the temperature distribution of the heater, FIG. 9 is a schematic sectional view of the heater showing the convection state, FIG. 10 is a plan view of a modified example with the cover removed, and FIG. 11 12 is a plan view of another modification with the cover removed, FIG. 13 is a schematic sectional view of the heater showing its convection state, and FIG. 14 is a second 15 is a circuit diagram of the cord heater, FIG. 16 is a sectional view of FIG. 14, and FIG.
Fig. 7 is a cross-sectional view taken along the - line, Fig. 18 is a partial side view of the support rod, Fig. 19 is a side view showing the mounting part, Fig. 20 is an enlarged sectional view thereof, and Fig. 21 is a proposed example of the heating heater. FIG. 19... Bottom plate constituting a part of the outer shell, 20...
...Mesh cover constituting a part of the outer shell, 21, 2
3, 51, 52... Spacer, 22, 22'... Reflector, 24, 24'... Heat sink, 26, 42, 4
3... Cord heater that is the heat source.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An outer shell, a spacer made of a thermally poor conductor arranged on the outer shell, a heat sink installed on the spacer, and a back side of the heat sink. an attached heat source;
A heater comprising: a reflecting plate installed at an intermediate position of the spacer between the heat source and the outer shell and having a reflective surface facing the heat sink. (2) The heat source is a cord heater wired to the heat sink, and a support member for supporting the cord heater is fixed to the outer shell with screws through the spacer together with the heat sink and the reflector. A space heater according to claim (1) of the utility model registration claim.