JPH0117117Y2 - - 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.

A kotatsu equipped with a heating heater proposed as the basis of this invention is shown in Figs. 1 to 9. That is, in this hokotatsu, a heater 2 is installed at the bottom of the main body 1, a grating 3 is placed on top of the heater 2, a stile 4 is hung on the upper opening of the main body 1, and a leg holder is attached to one opposing inner surface on the stile 4. 4a is provided, a tower 5 is hung thereon, a futon 6 is placed on the tower 5, and a top plate 7 is placed on it. 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 Ohiki, 17 is bundle, and 18 is bundle stone.

The heater 2 has a rectangular flat plate shape as a whole, and the outer shell is a second
As shown in the figure, it consists of a metal bottom plate 19 and a net-like cover 20 covering this. Inside there is a bottom plate 19
A reflector 22 is placed on the top of the reflector 22 via a first pipe 21 , a heat sink 24 is placed on the reflector 22 via a second pipe 23 , and a set screw 25 is inserted through the pipes 21 and 23 into the bottom plate 19 . A cord heater 26 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 has a nichrome wire 29 wound around a glass fiber body 28, its surface wrapped with four layers of glass fibers 30a to 30d, covered with a glass fiber braid 31, and 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, and connect it to the power cord 38.
It is drawn out to the outside through 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.

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 on the holes 40 becomes significant. Furthermore, as shown in FIGS. 12 and 13, if heat radiation 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.

However, in the heater configured as described above, the cord heater 26 has a large number of stops 2.
Since the screws are tightened to the heat dissipation plate 24 in step 7, the wiring shape of the cord heater 26 may vary (for each product).
This has the disadvantage that it impedes uniform heating, increases the number of parts and requires drilling holes in the heat sink, and is also difficult to assemble.

Therefore, the object of this invention is to provide a heating heater that reduces the number of parts, facilitates processing, and improves assemblability.

An embodiment of this invention is shown in FIGS. 14 to 20. That is, this heater includes a cord heater 42 for low heat and a cord heater 43 for medium heat.
A support member 4 having an inverted U-shaped cross section crosses the wiring in the horizontal direction with M-shaped wiring arranged in parallel and at regular intervals.
Cord heater housing recess 45 is located at the intersection of the upper surface of 4.
The support member 44 and the heat sink 24 are sandwiched between heat insulating washers 46 and 47 made of a thermally poor conductor such as mica, fiber, or resin. Insulation packing 4
8, the reflector plate 22 is also sandwiched between similar heat insulating washers 49 and 50, and a heat insulating packing 48' is interposed between the bottom plate 19, the reflector plate 22 and the heat sink plate 24.
Insulating gaskets 51 and 52 made of the same material are interposed between them as spacers, and are simultaneously fixed to the bottom with 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 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 configuration is the same as the previous proposal example.

Because this heater is configured in this way,
In addition to having the same effects as the proposed example, it also has the following effects. In other words, (1) Since the two types of cord heaters 42 and 43 for low heat and medium 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 member 44 in which the cord heater accommodating recess 45 is formed at the cord intersection position on the side, the cord heater 4
2, 43 is extremely easy to assemble, and it is possible to prevent variations in the M-shaped wiring shape between products that affect uniform heating. Also, since it has a reinforcing effect on the heat sink 24, thermal deformation of the heat sink 24 can be suppressed. be able to.

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

As described above, the heater of this invention includes a heat sink, a cord heater wired on the back side of the heat sink, and an inverted U-shaped cross section, the top surface of which is fixed in contact with the back side of the heat sink. The present invention also includes a support member in which a cord heater accommodating recess for supporting the cord heater is cut out at a position intersecting with the cord heater on the upper surface, so that the following effects can be obtained.

That is, compared to the conventional example, since the cord heater is supported in the cord heater housing recess and wired to the heat sink, the temperature of the cord heater can be averaged by the heat sink, and the heat radiation effect is improved.
Variations in the wiring shape of the cord heater can be reduced, and since the cord heater can be fixed by fixing the support member to the heat sink, the number of parts and processing can be reduced and assembly efficiency can be improved.

Furthermore, since the support member is formed to have an inverted U-shape in cross section and its upper surface is in contact with the back surface of the heat sink, the support member is The heat sink can be easily fixed to the heat sink, the reinforcement effect of the heat sink is high, and thermal deformation of the heat sink can be reliably prevented. Furthermore, since the cord heater accommodating recesses are cut out on the upper surface of the support member, the cord heater is supported at two points in each cord heater accommodating recess, so the cord heater can be reliably pressed against the heat sink, resulting in good adhesion. .

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a kotatsu to which the heater proposed as the basis of this invention is applied, Figure 2 is a side view of the heater, Figure 3 is a cross-sectional view, and Figure 4 is a cross-sectional view of the heater.
The figure is a plan view with the cover of the heater removed, Figure 5 is a broken perspective view of the cord heater, Figure 6 is a partial sectional view of the heat sink, Figure 7 is a sectional view showing the mounting part, Figure 8
The figure is an explanatory diagram showing the temperature distribution of the heater, Fig. 9 is a schematic cross-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 is the heater showing the convection state. 12 is a plan view of another modified example with the cover removed; FIG. 13 is a schematic sectional view of the heater showing its convection state;
Figure 4 is a plan view of one embodiment of this invention with the cover removed, Figure 15 is a circuit diagram of the cord heater, and Figure 16 is a diagram of the cord heater.
The figure is a sectional view of Fig. 14, and Fig. 17 is its -
18 is a partial side view of the support rod, FIG. 19 is a side view showing the mounting portion, and FIG. 20 is an enlarged sectional view thereof. 24... Heat sink, 42, 43... Cord heater, 44... Support member, 45... Cord heater housing recess.

Claims (1)

[Scope of utility model registration request] A heat sink, a cord heater wired on the back surface of the heat sink, the cross section of which has an inverted U shape, the top surface of which is fixed in contact with the back surface of the heat sink, and the cord heater wired on the top surface at a position intersecting with the cord heater. A heating heater comprising: a support member having a cut-out cord heater housing recess for supporting the cord heater.