JP3461817B2 - Heating system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device using combustion heat, and more particularly to a heating device using radiant heat.

[0002]

2. Description of the Related Art A conventional heating device of this type is disclosed in Japanese Utility Model Publication No. 63-
What was described in the 11548 gazette was general. As shown in FIG. 11, this heating device is provided with a burner 1 provided in the lower part of the main body, a hollow thin box-shaped heat exchanger 2 for passing combustion gas from the burner 1, and both sides of this heat exchanger 2. Longitudinal opening 3 and far-infrared paint 4 applied on at least the front surface of the heat exchanger 2.
And a convection fan 5 that blows indoor air to the heat exchanger 2 to exchange heat with the heat exchanger 2 and discharge it as hot air from the main body outlet.
The heat exchanger 2 has a hollow inside and the burner 1
The passage 7 is formed to be hollow so that the combustion gas 6 from
And a concave bead 8 is provided in a part of the passage 7 so that the combustion gas 6 is distributed to each part of the heat exchanger 2 and is discharged from the opening 3.

Then, the combustion gas 6 generated in the burner 1 is passed through the heat exchanger 2 and heated to 300 ° C. to 500 ° C., so that far infrared rays are radiated from the front surface coated with far infrared paint to perform radiant heating. . At the same time, the indoor air taken in by the convection fan 5 is blown along the rear surface of the heat exchanger 2, mixed with the combustion gas 6 discharged from the opening 3 of the heat exchanger 2, and discharged as warm air into the room. It was supposed to do wind heating.

[0004]

However, in the above conventional heating device, the combustion gas flows into the heat exchanger and heats the heat exchanger by convective heat transfer, but the convective heat transfer amount Qc is (Equation 1). As shown, it is proportional to the difference between the heat exchanger temperature and the combustion gas temperature, but the radiation amount Qr from the heat exchanger is the fourth power of the temperature of the heat exchanger and the temperature of the radiation heat absorption surface as shown in (Equation 2). It is proportional to the fourth power difference.

[0005]

[Equation 1]

[0006]

[Equation 2]

In the structure of the heat exchanger in the conventional heating device, the areas of the combustion gas and the heat exchanger are substantially equal, and the heat transfer coefficient of the heat exchanger is about 10 W / m2K because it is a flat plate. In order to raise the chamber temperature to 300 ° C, it is necessary to increase the temperature difference between the combustion gas temperature and the panel member, and the temperature of the combustion gas introduced into the panel member must be as high as about 870 ° C. The vessel had to be made of a material that could withstand high temperatures, and the flame generated by the burner had to heat the heat exchanger directly.
Further, the combustion gas in the heat exchanger passage has a problem that the thickness of the boundary layer increases as the flow becomes downstream, and the temperature of the heat exchanger decreases near the open end rather than near the burner. Furthermore, when the temperature of the heat exchanger becomes high, there is a problem that the heat exchanger is deformed due to thermal expansion.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a high temperature gas generating means for generating a high temperature gas, a heat collecting surface heated by the heat of the high temperature gas and a radiation surface for generating radiant energy. A radiator which has both surfaces of the radiator and is arranged from the front side to the upper side of the high temperature gas generating means, and is formed from the lower end toward the upper end facing the heat collecting surface of the radiator and guiding the high temperature gas to the heat collecting surface. The radiant body heating air passage, and a connecting air passage connecting the lower portion of the radiant body heating air passage and the high temperature gas generating means, and the heat collecting surface of the radiant body has a high temperature gas of the high temperature gas generating means lower than the radiant body. In addition to guiding the draft by the draft action, the hot gas of the hot gas generating means is also guided to the radiant surface of the radiant body as an ascending air current from the lower end of the radiant body, and the radiant body is heated from both the heat collecting surface and the radiant surface. is there.

With the above structure, the high temperature gas heats both the heat collecting surface and the radiating surface by the ascending air current from the lower end of the radiator,
The heat transfer area when the hot gas transfers heat to the radiator is expanded. Further, the area of the radiation surface does not decrease. Further, since the heat transfer coefficient is increased by heating both sides, the heat of the high temperature gas is efficiently transmitted to the radiating surface. Therefore, a high radiator temperature can be obtained even when the temperature of the high-temperature gas is low, and the temperature change of the radiation surface can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heating device according to claim 1 of the present invention comprises a high temperature gas generating means for generating high temperature gas, a heat collecting surface heated by the heat of the high temperature gas and a radiant surface for generating radiant energy. A radiator which has both surfaces of the radiator and is arranged from the front side to the upper side of the high temperature gas generating means, and is formed from the lower end toward the upper end facing the heat collecting surface of the radiator and guiding the high temperature gas to the heat collecting surface. The radiant body heating air passage, and a connecting air passage connecting the lower portion of the radiant body heating air passage and the high temperature gas generating means, and the heat collecting surface of the radiant body has a high temperature gas of the high temperature gas generating means lower than the radiant body. In addition to guiding the draft by the draft action, the hot gas of the hot gas generating means is also guided to the radiant surface of the radiant body as an ascending air current from the lower end of the radiant body, and the radiant body is heated from both the heat collecting surface and the radiant surface. is there. According to the above-described embodiment, the heat of the high temperature gas is efficiently transmitted to the radiating surface, so that the temperature difference between the temperature of the high temperature gas and the radiating surface can be reduced. Since the high-temperature gas heats the radiation surface from both the radiation surface and the heat collection surface, the heat transfer area when the high-temperature gas transfers heat to the radiator is doubled, and the heat of the high-temperature gas is efficiently radiated. It is transmitted to the surface. Therefore, the temperature difference between the high temperature gas and the radiation surface can be reduced.

According to a second aspect of the present invention, there is provided a heating device in which a radiator is provided with a heat collecting surface and a hole penetrating the radiation surface, and the high temperature gas of the high temperature gas generating means is guided to the radiation surface of the radiator. is there.

According to the above embodiment, the high-temperature gas flows from the hole to the radiant body to the radiant surface of the radiant body, and the heat transfer area when the high-temperature gas transfers heat to the radiant body is expanded. Development is small and heat transfer rate is large. Therefore, the heat of the high-temperature gas is efficiently transmitted to the radiant surface, the temperature difference between the combustion gas and the radiant surface can be made smaller, and the boundary layer does not develop, so that the temperature change on the radiant surface can be reduced.

In the heating device according to the third aspect of the present invention, the holes of the radiator are arranged in a staggered arrangement. As a result, the high-temperature gas heats the radiant surface evenly, so the heat transfer area when the high-temperature gas transfers heat to the radiant body is further expanded, and the heat of the high-temperature gas is efficiently transferred to the radiant surface. The temperature difference on the radiation surface can be made smaller.

In the heating device according to the fourth aspect of the present invention, the number of holes in the radiator is increased as the distance from the lower portion of the radiator is increased. As a result, the higher the temperature of the hot gas, the more it flows into the radiating surface as it goes farther from the lower part of the radiating body, and the radiating surface is heated from both sides, so that the temperature of the radiating body can be made uniform.

[0015]

( Embodiment 1 ) FIG. 1 is a perspective view showing a main part of a heating device according to a first embodiment of the present invention with a part cut away. In the figure, 11 is a high temperature gas generating means for generating high temperature gas such as a circular burner for burning oil or gas fuel, and 24 is a heat collecting surface 25 heated by the heat of the high temperature gas and a radiant surface for generating radiant energy. A heat-collecting surface heating air passage 2 which is a radiant body having 26 and which blows high-temperature gas to the heat-collecting surface 25 and the radiant surface 26.
7 and a radiant surface heating air passage 28 provided at the lower end of the radiant surface, and the heat collecting surface heating air passage 27 and the radiant surface heating air passage 28 guide the hot gas from the hot gas generating means 11 by the connecting air passage 17. Has become. With the above configuration, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is guided by the connecting air passage 17 to the radiator heating air passage inlet 29 provided below the heat-collecting surface heating air passage 27, and the heat-collecting surface heating air is introduced. While increasing the wind speed by draft action through the passage 27, the heat collecting surface 2
5 is heated and guided to the radiator heating air passage outlet 30 provided above the heat collecting surface heating air passage 27. Further, the high-temperature gas is guided from the connection air passage 17 to the radiation surface heating air passage 28, and the radiation surface 26
Is also blown to the upper surface of the radiant surface 26 to form an ascending air current, which rises and heats the radiant surface 26. Therefore, the radiator 24 is heated by the high temperature gas from both the heat collecting surface 25 and the radiation surface 26. Then, the radiator 24 is heated to about 300 ° C., far infrared rays are radiated from the radiation surface, and the room is heated by the radiation. Therefore, a comfortable feeling of heating can be obtained without direct breeze on the human body.

In the structure of this embodiment, the high temperature gas and the radiator 24
Since the heat transfer area of 2 is twice as large as the heating of only the heat collecting surface 25, when the temperature of the radiator is 300 ° C. as in the conventional example, it may be 580 ° C. Therefore, it is not necessary to use a line burner as the high-temperature gas generating means 11 to directly heat the heat exchanger with a flame, and a circular burner having excellent exhaust gas characteristics can be used to perform radiant heating with high-temperature gas. If the fins are provided in the radiator 24, the heat transfer efficiency can be further improved.

( Embodiment 2 ) FIG. 2 is a perspective view showing a principal part of a heating device according to a second embodiment of the present invention with a part cut away. In FIG. 2 , 11
Is a high temperature gas generating means for generating high temperature gas such as a circular burner for burning oil or gas fuel, 31 has a heat collecting surface 32 heated by the heat of the high temperature gas and a radiation surface 33 for generating radiant energy, Heat collecting surface 32 to radiation surface 33
Through holes 3 with a diameter of 5 mm and a pitch of 20 mm
4, a radiator heating air passage 16 for guiding high temperature gas is attached to the heat collecting surface 32 of the radiator 31, and the radiator heating air passage 16 is connected to the heating air passage 16 by a connecting air passage 17 to generate high temperature gas. The configuration is such that the high temperature gas is introduced from 11.

With the above structure, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is guided by the connecting air passage 17 to the radiator heating air passage inlet 29 provided below the radiator heating air passage 16 to heat the radiator. The heat collecting surface 32 is heated while increasing the wind speed through the air passage 16 by the draft action, and is guided to the radiation surface 33 through the hole 34 to become an upward flow and heat the radiation surface 33. Therefore, the radiator 31 is
Both the heat collecting surface 32 and the radiation surface 33 are heated by the hot gas. Then, the radiator 31 is heated to about 300 ° C., far infrared rays are radiated from the radiation surface 33, and the room is heated by the radiation. Therefore, a comfortable feeling of heating can be obtained without direct breeze on the human body.

In the structure of this embodiment, the high temperature gas and the radiator 31 are used.
The heat transfer area of is doubled as compared with the heating of only the heat collecting surface 32, and the development of the boundary layer is reduced by the holes 34, and the heat transfer coefficient is 15 W / m2K. Therefore, the heat of the high-temperature gas is efficiently transmitted to the radiation surface 33, and the temperature difference between the combustion gas and the radiation surface 33 can be further reduced.
When the radiator temperature is set to 300 ° C. as in the conventional example, the high temperature gas temperature may be 490 ° C. Therefore, it is not necessary to use a line burner as the high-temperature gas generating means 11 to directly heat the heat exchanger with a flame, and a circular burner having excellent exhaust gas characteristics can be used to perform radiant heating with high-temperature gas. Furthermore, since the boundary layer does not develop, the temperature change of the radiation surface 33 can be reduced.

( Embodiment 3 ) FIG. 3 is a perspective view showing a main part of a heating apparatus according to a third embodiment of the present invention with a part cut away. 3, Example
The same parts as those of 2 have the same configuration, and the radiator 31 is provided with holes 34 penetrating from the heat collecting surface 32 to the radiating surface 33 with a diameter of 5 mm and arranged at a pitch of 20 mm in a staggered arrangement.

With the above structure, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is connected to the radiator-heating air passage 16 provided under the radiation-heating air passage 16 by the connecting air passage 17.
9 and heats the heat collecting surface 33 while increasing the wind speed by the draft action through the radiator heating air passage 16 and is also guided to the radiating surface 33 through the holes 34 provided in the staggered arrangement and the ascending flow. Then, the radiation surface 33 is heated. Therefore, the heating efficiency of the radiation surface 33 is higher than that of the configuration of the fourth embodiment, and when the temperature of the radiator is 300 ° C. as in the conventional example, the high temperature gas temperature may be 470 ° C., and further. The temperature difference of the radiation surface 33 can be made smaller.

( Embodiment 4 ) FIG. 4 is a perspective view showing a principal part of a heating device according to a fourth embodiment of the present invention with a part thereof cut away. In Figure 4 , carried out
The same parts as in Example 2 have the same structure, and the radiator 31 has a hole 34 penetrating from the heat collecting surface 32 to the radiating surface 33 with a diameter of 5 mm.
Are arranged so that the number increases as the distance from the connecting air passage 17 increases.

With the above-described structure, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is provided with the connection air passage 17, and the radiator heating air passage inlet 2 is provided below the radiator heating air passage 16.
9 while heating the heat collecting surface 33 while increasing the wind speed by the draft effect through the radiator heating air passage 16 through the radiation body heating air passage 16 and being guided to the radiating surface 33 through the hole 34 to become an upward flow and become the radiating surface 33. To heat. The temperature of the high temperature gas flowing in from the connecting air passage 17 decreases as the distance from the connecting air passage 17 increases,
Since heating by the hot gas passing through the holes 34 of the radiation surface 33 greater number increasing distance from the connection air duct 17, Example 2
In addition to the above feature, the temperature distribution of the radiator 31 in the radiator heating direction can be made uniform.

( Embodiment 5 ) FIG. 5 is a perspective view showing a principal part of a heating device according to a fifth embodiment of the present invention with a part cut away. In FIG. 5 , 11
Is a high temperature gas generating means for generating high temperature gas such as a circular burner for burning oil or gas fuel, and 35 has a heat collecting surface 36 heated by the heat of the high temperature gas and a radiation surface 37 for generating radiant energy. Holes 38 penetrated from the heat surface 36 to the radiation surface 37 with a diameter of 5 mm and arranged at a pitch of 20 mm
And the heat collecting surface 37 and the radiating surface 37 are three times as large as the projected area, and are continuously bent at a pitch and a depth.
A radiator heating air passage 16 for guiding high temperature gas is attached to the radiator heating air passage 16, and a high temperature gas is guided from the high temperature gas generating means 11 to the radiator heating air passage 16 by a connecting air passage 17. With the above configuration, the high temperature gas generated by the combustion of the high temperature gas generating means 11 is guided by the connecting air passage 17 to the radiator heating air passage inlet 29 provided below the radiator heating air passage 16 and the radiator heating air passage 16 is provided. While heating the heat collecting surface 36 while increasing the wind speed by the draft action through the through holes, the heat collecting surface 36 is guided to the radiant surface 37 through the holes 38 and becomes an upward flow to heat the radiant surface 37. Therefore, the radiator 36 is heated by the hot gas from both the heat collecting surface 36 and the radiation surface 37. Then, the radiator 35 is heated to about 300 ° C., far infrared rays are radiated from the radiation surface 37, and the interior of the room is heated by the radiation. Therefore, a comfortable feeling of heating can be obtained without direct breeze on the human body. In the structure of this embodiment, the heat transfer area between the high temperature gas and the radiator 35 is doubled for heating only the heat collecting surface, and the area of the heat collecting surface 36 is tripled for the projected area. The heat transfer area from the high-temperature gas to the radiant body 35 is six times as large as that of the first embodiment. Due to the holes 38, the development of the boundary layer is reduced and the heat transfer coefficient is 15 W / m.
It will be 2K. Therefore, the heat of the high-temperature gas is efficiently transmitted to the radiation surface 37, and the temperature difference between the temperature of the combustion gas and the radiation surface 37 can be made smaller. When the radiator temperature is set to 300 ° C. as in the conventional example, the high temperature gas temperature may be 370 ° C. Therefore, it is not necessary to use a line burner as the high-temperature gas generating means 11 to directly heat the heat exchanger with a flame, and a circular burner having good exhaust gas characteristics is used.
Radiant heating can be performed indirectly by producing high-temperature gas with a flame.

Further, since the area of the radiation surface 37 is three times as large as the projected area, the apparent emissivity is increased and the radiation amount at the time of heating can be increased even at the same temperature of the radiator 36.

Further, even when the radiator 35 becomes hot and thermally expands, the expansion is absorbed by the bent portion, so that the deformation of the entire radiator can be prevented.

( Embodiment 6 ) FIG. 6 is a perspective view showing a principal part of a heating device according to a sixth embodiment of the present invention with a part cut away. In FIG. 6 , 11
Is a high temperature gas generating means for generating high temperature gas such as a circular burner for burning oil or gas fuel, and 39 has a heat collecting surface 40 heated by the heat of the high temperature gas and a radiation surface 41 for generating radiant energy. , Heat collecting surface 40 to radiation surface 4
Is a radiant body having a louvered hole 43 with an open end 42 that cuts and raises the radiant surface 41 as a heat transfer promoting means. The air duct 16 is attached, and the radiator heating air duct 1 is installed.
A high temperature gas is guided from the high temperature gas generating means 16 to the 6 by a connecting air passage 17.

With the above structure, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is connected to the radiator-heating air passage 16 provided below the radiation-heating air passage 16 by the connecting air passage 17.
8 through the radiant body heating air passage 16 to heat the heat collecting surface 40 while increasing the wind speed by the draft action, and at the same time, it is guided to the radiant surface 41 by the louvered hole 43 and from the open end 42 to the radiant surface 41. Are sprayed onto the radiant surface 41 to heat the radiation surface 41. Therefore, the radiator 39 is
Both the heat collecting surface 40 and the radiation surface 41 are heated by the hot gas. Then, the radiator 39 is heated to about 300 ° C., far infrared rays are radiated from the radiation surface 41, and the room is heated by the radiation. Therefore, a comfortable feeling of heating can be obtained without direct breeze on the human body.

In the structure of this embodiment, the high temperature gas and the radiator 39 are used.
The heat transfer area of 2 is twice as large as that of heating only the heat collecting surface 40, and the louver also serves as a radiator, so that the area of the radiating surface 41 is not reduced by the hole 43 with the louver. Further, the louvered holes 43 reduce the development of the boundary layer and the heat transfer coefficient becomes 25 W / m2K. Therefore, the heat of the high temperature gas is efficiently transmitted to the radiation surface 41,
The temperature difference between the combustion gas and the radiation surface 41 can be made smaller. The radiator temperature is set to 300 as in the conventional example.
When the temperature is ℃, the high temperature gas temperature may be 410 ℃. Therefore, it is not necessary to use a line burner as the high-temperature gas generating means 11 to directly heat the heat exchanger with a flame, and a circular burner having excellent exhaust gas characteristics can be used to perform radiant heating with high-temperature gas. Furthermore, since the boundary layer does not develop, the temperature change of the radiation surface can be reduced.
Further, since the radiator is reinforced by the louver, the deformation of the radiator can be reduced.

( Embodiment 7 ) FIG. 7 is a perspective view showing a main part of a heating device according to a seventh embodiment of the present invention with a part thereof cut away. In Figure 7 , carried out
The parts with the same numbers as in Example 6 have the same structure, and as the heat transfer promoting means, the opening end 42 of the hole 43 with the louver is provided above in the direction of gravity. With the above structure, the high-temperature gas flows out from the radiator heating air passage 16 above the radiating surface 41 of the radiating body 49 due to the draft effect, so that the wind speed from the opening end 42 increases and the heat transfer coefficient on the radiating surface 41 increases. The temperature difference between the high temperature gas and the radiation surface 41 can be made smaller. Further, the pressure loss of the high temperature gas blow can be reduced, and the blower 44 can be downsized.

( Embodiment 8 ) FIG. 8 is a perspective view showing a principal part of a heating device according to an eighth embodiment of the present invention with a part cut away. 8, carried out
The parts with the same numbers as in Example 6 have the same structure, and the holes 43 are provided in a staggered arrangement from the heat collecting surface 40 of the radiating body 39 to the radiating surface 41 and with louvers as heat transfer promoting means. ing. With the above configuration, the high temperature gas flows from the radiator heating air passage 16 through the louvered holes 43 provided in the staggered arrangement from the opening end 42 to the radiant surface 41 and uniformly heats the radiant surface 41. The heat transfer area when the gas transfers heat to the radiator 39 is further expanded, the heat of the high-temperature gas is efficiently transferred to the radiant surface 41, and the temperature difference between the high-temperature gas and the radiant surface can be made smaller.

( Embodiment 9 ) FIG. 9 is a perspective view showing a principal part of a heating device according to a ninth embodiment of the present invention with a part thereof cut away. 9, exemplary
The parts with the same numbers as in Example 6 have the same configuration, and the radiator 39
The louvered holes 43, which penetrate the heat collecting surface 40 to the radiant surface 39 and cut and raise the radiant surface 39 as a heat transfer promoting means and have the opening end 42, are arranged so that the number becomes larger as the distance from the connecting air passage 17 increases. There is.

With the above structure, the high-temperature gas generated by the combustion of the high-temperature gas generating means 11 is connected to the radiator-heating air passage 16 provided below the radiation-heating air passage 16 by the connecting air passage 17.
8 through the radiant body heating air passage 16 to heat the heat collecting surface 40 while increasing the wind speed by the draft action, and at the same time, it is guided to the radiant surface 41 through the hole 43 provided with the louver and becomes an updraft. To heat the radiation surface 41. Although the temperature of the high-temperature gas flowing in from the connecting air passage 17 decreases as the distance from the connecting air passage 17 increases, the louvered hole 4 of the radiation surface 41 is provided.
Since the number of heating by the high-temperature gas that has passed through 3 increases as the distance from the connecting air passage 17 increases, the temperature distribution in the radiator heating direction of the radiator can be made uniform in addition to the characteristics of the eighth embodiment.

( Embodiment 10 ) FIG. 10 is a perspective view showing a principal part of a heating device according to a tenth embodiment of the present invention with a part cut away.

In FIG . 10 , 11 is a high temperature gas generating means for generating a high temperature gas such as a circular burner for burning oil or gas fuel, and 45 is a heat collecting surface 46 heated by the heat of the high temperature gas and radiant energy. Radiation surface 47 to be generated
Has a hole that penetrates from the heat collecting surface 46 to the radiation surface 47, cuts and raises the radiation surface 47 as a heat transfer promoting means, and has an opening end 48.
It is a radiator provided with a hole 49 with a bar and has a heat collecting surface 46.
And the radiating surface 47 has a shape that is continuously bent at a pitch and depth such that the area of the radiating surface 47 is tripled, and the radiant body heating air passage 16 that guides high-temperature gas is attached to the heat collecting surface 46 of the radiant body 45. The hot air generating means 11 is configured to guide the hot gas from the hot gas generating means 11 to the radiator heating air path 16 by the connecting air path 17. With the above configuration, the high temperature gas generating means 11
The high-temperature gas generated by the combustion of the air is guided by the connecting air passage 17 to the radiator heating air passage inlet 29 provided in the lower portion of the radiator heating air passage 16 and passes through the radiator heating air passage 16 to increase the wind speed by the draft action. Meanwhile, while heating the heat collecting surface 46 in the middle of the radiator heating air passage 16, it is guided from the opening end 48 to the radiating surface 47 through the hole 49 provided with the louver, and becomes an ascending airflow, so that the radiating surface 47 is formed. To heat. Therefore, the radiator 45 is heated by the high temperature gas from both the heat collecting surface 46 and the radiating surface 47. Then, the radiator 45 is heated to about 300 ° C., far infrared rays are radiated from the radiation surface 47, and the room is heated by the radiation. Therefore, a comfortable feeling of heating can be obtained without direct breeze on the human body. In the configuration of the present embodiment, the heat transfer area between the high temperature gas and the radiator 45 is double the heating area 46 alone, and the area of the heat collecting surface 46 is triple the projected area. Since it is bent like this, the heat transfer area from the high temperature gas to the radiator 45 is 6 times, and the development of the boundary layer is reduced by the hole 49 with the louver and the heat transfer coefficient is 25 W / m2K. . Therefore, the heat of the high-temperature gas is efficiently transmitted to the radiation surface 47, and the temperature difference between the combustion gas and the radiation surface 47 can be made smaller. When the radiator temperature is set to 300 ° C. as in the conventional example, the high temperature gas temperature is 35
0 ° C is good. Therefore, it is not necessary to use a line burner as the high temperature gas generating means 11 to directly heat the heat exchanger with a flame, and a circular burner having good exhaust gas characteristics is used to indirectly generate a high temperature gas with the flame to perform radiant heating. You can

Further, since the area of the radiation surface 47 is three times as large as the projected area, the apparent emissivity is increased, and the radiation amount during heating can be increased even at the same temperature of the radiator 47.

Further, even when the radiation surface 47 becomes higher in temperature and thermally expands, the radiator is reinforced by the louver and the expansion is absorbed by the bent portion, so that the deformation of the entire radiator can be prevented.

[0038]

As described above, according to the heating device of the present invention, the heating area for heat transfer of the hot gas to the radiator is doubled, and the heat of the hot gas is efficiently transferred to the radiation surface. The difference between the temperature of the high temperature gas and the temperature of the radiation surface can be reduced, and a high radiator temperature can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part by cutting away a part of a heating device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the heating device according to the second embodiment with a part thereof cut away.

FIG. 3 is a perspective view showing a main part of the heating device according to the third embodiment with a part thereof cut away.

FIG. 4 is a perspective view showing a main part by cutting out a part of a heating device according to the fourth embodiment.

FIG. 5 is a perspective view showing a main part with a part of the heating device cut away according to the fifth embodiment.

FIG. 6 is a perspective view showing a main part with a part of the heating device cut away according to the sixth embodiment.

FIG. 7 is a perspective view showing a main part with a part of the heating device cut away according to the seventh embodiment.

FIG. 8 is a perspective view showing a main part with a part of the heating device cut away according to the eighth embodiment.

FIG. 9 is a perspective view showing a main part with a part of the heating device cut away according to the ninth embodiment.

FIG. 10 is a perspective view showing a main part of the heating device according to the tenth embodiment with a part thereof cut away.

FIG. 11 is a partially cutaway view showing a main part of a conventional heating device .
Perspective view

[Explanation of symbols]

11 High-temperature gas generating means 24, 31, 35, 39, 45 Radiant 25, 32, 36, 40, 46 Heat collecting surface 26, 33, 37, 41, 47 Radiant surface 16 Radiant heating air duct 17 Connected airways 29 Radiant heating air duct entrance 30 Radiant heating air duct outlet 27 Heat collecting surface heating air duct 28 Radiant surface heating air duct 34, 38 holes 42, 48 Open end 43,49 holes with louvers

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-106316 (JP, A) JP-A-3-233230 (JP, A) JP-A-2-4132 (JP, A) Actual Kaihei 2- 115619 (JP, U) Actual development 61-79153 (JP, U) Actual public 43-11434 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) H24C 1/00-15 / 24 F24H 3/00

Claims (4)

(57) [Claims] 1. A high temperature gas generating means for generating a high temperature gas, a heat collecting surface heated by the heat of the high temperature gas, and a radiant surface for generating radiant energy are provided on both sides of the high temperature gas generating means. And a radiator placed over
A radiator heating air passage formed to face the heat collecting surface of the radiant body from the lower end toward the upper end and guiding the high temperature gas to the heat collecting surface, a lower portion of the radiant body heating air passage, and a high temperature gas generating means. It is equipped with a connecting air path to connect, and guides the high temperature gas of the high temperature gas generating means to both sides of the heat collecting surface and the radiating surface of the radiating body as an ascending air current from the lower end of the radiating body, and the radiating body from both the heat collecting surface and the radiating surface A heating device configured to heat. 2. The heating device according to claim 1, wherein the radiator has a heat collecting surface and a hole penetrating the radiation surface to guide the high temperature gas of the high temperature gas generating means to the radiation surface of the radiator. 3. The heating device according to claim 2, wherein the holes of the radiator are arranged in a staggered arrangement. 4. The heating device according to claim 2, wherein the number of holes in the radiator is increased with increasing distance from the lower portion of the radiator.