JP2003115364A - Heater and metal plate for heat transfer used for heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heater and a metal plate for heat transfer used for the heater, which make it possible to attain the heating effect also in the position distant from the surface of the heater by making the heat conduction efficiency from a sheet-like heating element to the metal plate for heat transfer good, while preventing that the temperature inside the heater rises superfluously by filling the heat inside of the heater, and the sheet-like heating element is damaged. SOLUTION: The heater consists of the sheet-like heating element and the metal plate for heat transfer at least, and it is constituted by arranging the metal plate for heat transfer to the vicinity of the sheet-like heating element. It has the composition in which the blacking processing is performed to the front surface and the back surface of the above metal plate for heat transfer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to heating, heating,
The present invention relates to a heater having a heat transfer metal plate for improving the heat efficiency of the heater in a heater used for freeze prevention and the like, and a heat transfer metal plate used for the heater.

[0002]

2. Description of the Related Art Conventionally, various contrivances have been made for heaters used for heating, heating, antifreezing, etc. for the purpose of efficient heat conduction. A metal plate for heat transfer is arranged close to the planar heating element, and heat is transmitted from the metal plate for heat transfer to generate heat from the surface of the heater or a member that radiates far infrared rays to the surface of the heater. A structure is used in which the heat generated from the planar heating element arranged at the center of the heater is spread to a position apart from the heater. Among such devices, one that is often used in terms of cost is a structure in which a metal plate for heat transfer is arranged close to the above-mentioned sheet heating element. A heater using this heat transfer metal plate can improve heat conduction efficiency and physically protect the sheet heating element to strengthen the heater.

In the case of the floor heating heater using the metal plate for heat transfer shown in FIG. 4 (a), a heat insulating material is adhered to the lower surface of the sheet heating element, and the upper surface of the sheet heating element is attached. The heat transfer metal plate for radiation is brought into close contact, and the whole is laminated to form. In this case, the heat transfer metal plate arranged on the upper surface of the sheet heating element can conduct the heat generated from the sheet heating element to warm the surface of the floor heating heater. However, since the heat transfer metal plate is not processed on the surface, it is heated only near the surface of the floor heating heater when placed on the upper surface of the sheet heating element, and the heat of the floor heating heater is extremely high. The heating effect can be achieved only in a short distance.

In order to solve this problem, the upper surface of the heat transfer metal plate is subjected to a process such as a black treatment to generate far infrared rays. FIG. 4B is a partial cross-sectional view showing the structure of the floor heating heater using the heat transfer metal plate whose surface is subjected to black treatment as described above. As a result, when the heat generated by the planar heating element 62 reaches the radiation surface 632 of the heat transfer metal plate 63, which is the surface of the floor heating heater 61, through the inside 633 of the heat transfer metal plate 63, In order to radiate far infrared rays on the radiation surface 632, the heater 6 for floor heating is used.
It is possible to obtain the heating effect not only in the vicinity of 1, but also in a position away from the heater 61 for floor heating.

FIG. 5 is a partial cross-sectional view showing the structure of an upright heater using a heat transfer metal plate having a black surface on one side as described above. As shown in FIG. 5A, a vertical heater 61 as shown in FIG. 5 has a reflection plate 65 adhered to one surface of the sheet heating element 62 and a black surface treatment for heat radiation on the other surface. When the metal plate 63 for heat transfer, which is processed so as to radiate far infrared rays by the above, is closely arranged, or as shown in (b), the surface for heat radiation is processed on both surfaces of the planar heating element 62. There is a case where the heat transfer metal plate 63 applied to the above is closely arranged. In this case as well, similar to the floor heating heater 61, the radiation surface 632, which is far from the planar heating element 62 of the heat transfer metal plate 63 and is the surface of the standing heater 61, is subjected to black treatment. Therefore, the heat generated from the planar heating element 62 is generated by the standing heater 61.
Far infrared rays radiate when reaching the surface of No. 3, so that it is possible to obtain the heating effect not only in the vicinity of the standing heater 61 but also at a position away from the standing heater 61.

[0006]

By the way, far infrared rays such as black treatment are generated on the surface of the heat transfer metal plate used in the above-mentioned heater for floor heating or the standing type heater. Although the treatment is performed, the surface to be treated in any case is a surface not in contact with the sheet heating element. In this case, as shown in FIG. 6, the heat generated by the planar heating element inside the heater is conducted from the planar heating element to the heat transfer metal plate and reaches the surface of the heater. The heat-radiating metal plate on the outer side is effectively radiated by the radiating surface that is black-colored.

However, since the surface of the heat transfer metal plate which is close to the sheet heating element is not subjected to any special treatment, the surface of the heat transfer metal plate which is close to the sheet heating element is heated. May be reflected and the heat may be accumulated inside the heater, and the temperature inside the heater may excessively rise to damage the planar heating element. Furthermore, the heat conduction efficiency of the heat generated from the planar heating element to the heat transfer metal plate is also poor, and the heat generation efficiency of the heater is also reduced, and the upper surface of the heat transfer metal plate is blackened. However, there is a problem that the heating effect cannot be achieved at a position away from the surface of the heater, even though the radiation surface is provided.

The object of the present invention has been made in view of the above problems, and it is possible to prevent heat from being accumulated inside the heater, causing the temperature inside the heater to rise excessively and damaging the sheet heating element. In addition to preventing the above, the heat transfer efficiency from the planar heating element to the metal plate for heat transfer can be improved, and the heating effect can be achieved even at a position distant from the surface of the heater. To provide a metal plate for heat.

[0009]

In order to solve the above-mentioned problems, a heater of the present invention comprises at least a sheet heating element and a heat transfer metal plate, and the sheet heat transfer metal plate is used to generate a sheet heat. In the heater formed close to the body, the heat transfer metal plate has a black surface treatment on its front and back surfaces.

As described above, the heater using the metal plate for heat transfer having the blackened surface on both sides has the planar heat generating element on the surface of the metal plate for heat transfer near the planar heat generating element. The generated heat is absorbed, the heat is conducted to the inside of the heat transfer metal plate, and the heat is radiated on the surface of the heat transfer metal plate that is far from the planar heating element. Therefore, heat is reflected on the surface of the metal plate for heat transfer, which is close to the planar heating element, which the conventional heater has, and the planar heating element is overheated more than necessary, and It is possible to solve problems such as damage. Further, in the past, since heat is reflected on the surface of the heat transfer metal plate closer to the planar heat generating element, the problem that the heat conduction efficiency from the planar heat generating element to the heat transfer metal plate decreases is solved. Also possible.

The black treatment of the present invention is performed by means such as applying black coating to the surface of the heat transfer metal plate or adhering a film having a black effect to the surface of the heat transfer metal plate. However, the means for performing the black treatment is not particularly limited, and it is possible to perform the black treatment by using an appropriate means.

Further, the black treatment of the present invention is not particularly limited as long as it can generate far infrared rays as described above, and is appropriately processed depending on the material of the heat transfer metal plate. . As an example, when the heat transfer metal plate is made of aluminum, a black alumite treatment is typical as a process capable of generating far infrared rays applied to the surface thereof. Other typical black treatments include a method of coating a material containing black chrome, titanium oxide, etc., but a method of blackening the surface of the heat transfer metal plate in addition to these exemplified methods. Then, the object of the present invention can be achieved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. 1 is an exploded perspective view showing the structure of the heater of the present embodiment, FIG. 2 is a partial cross-sectional view showing the structure of the heater of the present embodiment 1, and FIG. 3 is an embodiment 1 shown in FIG. FIG. 3 is an explanatory diagram for explaining heat conduction of the heater of FIG.

As shown in FIGS. 1 and 2, the heater 1 of this embodiment includes a sheet heating element 2, a heat transfer metal plate 3 made of aluminum with black alumite treatment on both sides, and heat insulation. Material 4
The heat transfer metal plate 3 is arranged on the upper surface of the sheet heating element 2, and the heat insulating material 4 is placed on the lower surface of the sheet heating element 2.
Are arranged to form the laminated heater 1.

With respect to the heat conduction by such a constitution, as shown in FIG. 3, the heat generated from the sheet heating element 2 is close to that of the sheet heating metal sheet 3 subjected to the black treatment. Is absorbed by the absorption surface 31, which is the surface on the side of
The heat is conducted to the radiating surface 32, which is the surface on the side far from the sheet-shaped heating element coated with black of the heat-transfer metal plate 3, and thermal radiation is performed. Compared with the case of using a conventional heat transfer metal plate coated with black on only one surface, the heat generated by the planar heating element 2 is not reflected by the absorbing surface 31, so the planar heating element 2 From the above, it is possible to efficiently conduct heat to the metal plate 3 for heat transfer, and prevent the planar heating element 2 from being overheated more than necessary and causing damage.

The heater 1 using the metal plate 3 for heat transfer of this embodiment is energized for 35 minutes, and the point A on the absorption surface 31 and the point B on the radiation surface 32 of the metal plate 3 for heat transfer are respectively. Was measured. As a result, the temperature on the absorption surface 31 of the heat transfer metal plate 3 was 43 ° C, and the temperature on the radiation surface 32 of the heat transfer metal plate 3 was 38 ° C.

[0017]

[Comparative Example 1] The structure shown in FIG. 4 (a) is the same as that of the above-described example except that the black heat treatment is not applied to both surfaces and the heat transfer metal plate 53 is used in which both surfaces are untreated. The heater is energized for 35 minutes as in the embodiment, and the inner surface 53, which is the surface where the metal plate 53 for heat transfer contacts the planar heating element 52.
An outer surface 53 corresponding to the point A in 1 and the outer surface of the heater 51
The respective temperatures at point B in 2 were measured. As a result, the temperature of the point A on the inner surface 531 was 65 ° C, and the temperature of the point B on the outer surface 532 was 52 ° C.

[0018]

[Comparative Example 2] The same structure as that of the above-described example was used except that a heat transfer metal plate 63 having a black color treatment on only one surface was used.
As for the heater shown in (b) of FIG.
Power is applied for 5 minutes, and the metal plate 63 for heat transfer is applied to the planar heating element 6.
Point A on the inner surface 631 that is in contact with 2 and the heater 6
The temperature of each point B on the radiation surface 632, which is the outer surface of No. 1, was measured. As a result, the point A on the inner surface 631
Was 50 ° C., and the temperature at the point B on the radiation surface 632 was 39 ° C.

As described in the embodiment, the heat generated by the sheet heating element 2 is quickly transferred to the inside 33 of the heat transfer metal plate 3 by the black treatment applied to the absorbing surface 31, so that the sheet heating element 2 is heated. Since the temperature around is low, it is possible to prevent the sheet heating element 2 from being abnormally heated and damaged. Further, the surface temperature of the radiation surface 32 of the heat transfer metal plate 3 is relatively low. This is because the heat transferred to the radiation surface 32 via the inside 33 of the heat transfer metal plate 3 is This is because the heat is dissipated at the radiating surface 32, and it shows that the heater 1 using the heat-transfer metal plates 3 having both surfaces subjected to black treatment efficiently heats the outside air in this embodiment. .

On the other hand, in Comparative Example 1, the sheet heating element 5 is used.
Most of the heat generated by No. 2 is reflected by the inner surface 532, so that the vicinity of the sheet heating element 52 may be abnormally heated and damaged as compared with the present embodiment, which is dangerous. Further, as compared with the present embodiment, the surface temperature of the outer surface 532 corresponding to the outer surface of the heater 51 is also higher, and heat is accumulated only on the outer surface of the heater 51, so that the heat can be efficiently dissipated to warm the outside air. Absent.

In Comparative Example 2, the black surface is provided on only one surface of the heat transfer metal plate 63 so as to be the outer surface of the heater 61. In this case, the temperature of the outer surface of the heater 61 is set. Is comparable to the temperature of the outer surface in this example, and the heat dissipation is better than that in Comparative example 1.
However, since the inner surface 632 of the metal plate 63 for heat transfer facing the planar heating element 62 is not subjected to black treatment, the heater 6
The temperature in the vicinity of the sheet heating element 62, which is the inner surface of the sheet No. 1, becomes high, and the sheet heating element 62 is abnormally heated as compared with the present embodiment. Therefore, there is a high possibility that the sheet heating element 62 is damaged, which is dangerous. .

[0022]

As described above, in the heater of the present invention, the metal plate for heat transfer has a planar heating element as compared with the conventional heater using the metal plate for heat transfer with black treatment on only one surface. Since the black surface is also applied to the surface close to, it is possible to efficiently conduct heat from the sheet heating element to the heat transfer metal plate, and it is possible for the heater to generate good heat.

Further, in the conventional heater using the heat-transfer metal plate having only one surface subjected to black treatment, the untreated surface of the heat-transfer metal plate is brought close to the planar heating element. There was a problem that heat is reflected on the absorption surface and the planar heating element is overheated and damaged more than necessary, but the metal plate for heat transfer used in the present invention is subjected to black treatment on the front surface and the back surface. ,
This problem can be solved because the heat generated by the sheet heating element is absorbed by the surface of the metal plate for heat transfer that is close to the sheet heating element.

Further, since the black treatment applied to the heat transfer metal plate can be performed by using the same material on both sides, the production is easy and the production is inexpensive.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a heater of the present invention.

FIG. 2 is a partial cross-sectional view showing the structure of the heater of the present invention.

FIG. 3 is an explanatory view showing heat conduction in the heater of the present invention.

FIG. 4 is a partial sectional view showing a conventional heater for floor heating.

FIG. 5 is a partial cross-sectional view showing a conventional standing heater.

FIG. 6 is an explanatory diagram showing heat conduction in a conventional heater.

[Explanation of symbols]

1 heater 2-sided heating element 3 Metal plate for heat transfer 4 insulation 31 Absorption surface 32 Radiant surface 33 Inside metal plate for heat transfer 51 heater 52 Sheet heating element 53 Metal plate for heat transfer 54 Insulation 531 Inside 532 exterior 533 Inside metal plate for heat transfer 61 heater 62 Sheet heating element 63 Metal plate for heat transfer 64 insulation 65 Reflector 631 inner surface 632 Radiant surface 633 Inside the heat transfer metal plate 64 insulation 631 inner surface 632 exterior 633 Inside the heat transfer metal plate

Claims (6)

[Claims] 1. A heater comprising at least a planar heat generating element and a heat transfer metal plate, wherein the heat transfer metal plate is disposed close to the planar heat generating element, wherein the heat transfer metal is A heater characterized in that the front and back surfaces of the plate are subjected to black treatment. 2. The black treatment performed on at least one surface of the front and back surfaces of the heat transfer metal plate is black alumite treatment. heater. 3. The heater according to claim 1, wherein the black treatment applied to the front surface and the back surface of the heat transfer metal plate is made of the same material. 4. A heat transfer metal plate for use in a heater, which is arranged close to a sheet heating element to improve the heat transfer efficiency of the heater. A metal plate for heat transfer used in a heater, characterized by being subjected to black treatment. 5. The black treatment applied to at least one surface of the front surface and the back surface of the heat transfer metal plate is a black alumite treatment. Metal plate for heat transfer used for heater. 6. The heat transfer metal plate used in the heater according to claim 4 or 5, wherein the black treatment applied to the front surface and the back surface of the heat transfer metal plate is made of the same material. .