JP7680981B2 - Heater - Google Patents

Description

This invention relates to a heater that heats a room using combustion gas produced by burning a burner.

In the past, this type of device had a burner section directly installed in the heat dissipation section, and the front surface of the flat box-shaped heat dissipation section was heated to dissipate heat. However, because the combustion gas from the burner section flows directly into the heat dissipation section, uneven heating occurs in the heat dissipation section, making it impossible to obtain uniform and efficient heat dissipation, and there was also a risk of burnout in areas where heat was concentrated.

Therefore, a ventilation means consisting of multiple small holes is provided in the heat dissipation section, on a partition plate that separates the front side, which is the heat dissipation surface, from the back side, which has the inlet and outlet for the combustion gas. The small holes are formed so that the center part facing the inlet for the combustion gas is dense and the end part facing the outlet is coarse, or the small holes in the center part facing the inlet are larger than the small holes facing the outlet. (See, for example, Patent Document 1.)

JP 2007-298194 A

However, in this conventional system, the inlet through which the combustion gas flows into the heat dissipation section is located in the center of the heat dissipation section, and the outlet through which the combustion gas that has flowed into the heat dissipation section flows out of the heat dissipation section is located at the end of the heat dissipation section. As a result, the combustion gas that flows in from the inlet flows directly to the outlet, and the combustion gas that passes through the small holes in the partition plate between the inlet and the outlet also flows directly to the outlet, resulting in a high temperature in the center of the heat dissipation section and a low temperature on the side opposite the outlet of the heat dissipation section. This inevitably leads to temperature unevenness in the heat dissipation section, making it difficult to increase the amount of radiation from the heat dissipation section.

In order to solve the above problem, claim 1 of the present invention provides a heater that includes a heat dissipation section that dissipates heat by circulating the combustion gas generated by the combustion of the burner section, and a partition plate that separates the front side, which serves as the heat dissipation surface within the heat dissipation section, from a rear side that has an inlet and outlet for the combustion gas, the inlet being provided in the center of the rear side and the outlet being provided at one end of the rear side, and the partition plate being formed with a ventilation means consisting of a number of small holes, the small holes of the ventilation means having a larger diameter as they move away from the outlet side, and the small holes near the end opposite the outlet have a burring portion that is formed in a convex shape toward the front around the hole.

In addition, in claim 2, the partition plate is formed into a shape having a central flat portion and curved portions above and below it, and the small hole with a burring portion formed in a convex shape around the hole is formed in the flat portion.

In addition, in claim 3, the front side of the heat dissipation section is formed with an uneven cross section, and a small hole with a burring section formed in a convex shape around the hole is located in the front part of the cross section that is convex at the front of the heat dissipation section.

In addition, in claim 4, the left and right ends of the partition plate are folded to form folded portions, and the folded portion on the outlet side is larger than the folded portion on the opposite side of the outlet.

According to claim 1 of this invention, the small holes, which are ventilation means formed in the partition plate of the heat dissipation section, have a larger hole diameter as they move away from the outlet side, and the small holes near the end opposite the outlet have a burring section formed in a convex shape around the hole, so that more combustion gas passes through the small holes as they move away from the outlet side, and the entire heat dissipation section is heated evenly.Furthermore, the combustion gas is guided to the convex section of the small holes formed in a convex shape around the hole, and hits the heat dissipation section in front of the small holes, so that the combustion gas hits the part of the heat dissipation section opposite the outlet, preventing the occurrence of temperature unevenness in the heat dissipation section, and the entire heat dissipation section can be efficiently heated to increase the radiation amount of the heat dissipation section.

Furthermore, according to claim 2, the partition plate is formed into a shape with a central flat portion and curved portions above and below it, and by forming it on the flat portion, the entire small hole is evenly close to the heat dissipation portion, and further, the small hole with the burring portion formed in a convex shape around the hole is closer to the heat dissipation portion, so that the combustion gas hits the entire heat dissipation portion, preventing uneven temperature in the heat dissipation portion, and efficiently heats the entire heat dissipation portion, increasing the radiation amount of the heat dissipation portion.

Furthermore, according to claim 3, the front side of the heat dissipation section is formed with an uneven cross section, and a small hole with a burred portion formed in a convex shape around the hole is located in the convex cross section on the front side of the heat dissipation section. Therefore, by forming the front side of the heat dissipation section with an uneven cross section, the strength of the heat dissipation section is increased, and by positioning the small hole with a burred portion formed in a convex shape around the hole in the convex cross section on the front side of the heat dissipation section, the combustion gas from the small hole with the burred portion formed in a convex shape around the hole hits the convex cross section on the front side of the heat dissipation section and is heated, preventing the occurrence of temperature unevenness in the heat dissipation section, and efficiently heating the entire heat dissipation section to increase the radiation amount of the heat dissipation section.

Furthermore, according to claim 4, both ends of the partition plate are folded to form bent portions, and the bent portion on the outlet side is made larger than the bent portion on the opposite side of the outlet. This makes it difficult for the combustion gas to take a shortcut by making the bent portion on the outlet side larger, and by making the bent portion on the opposite side of the outlet smaller, the combustion gas that has flowed to the opposite side of the outlet can easily flow around the end of the partition plate and toward the outlet, thereby preventing uneven temperature in the heat dissipation section and efficiently heating the entire heat dissipation section to increase the radiation amount of the heat dissipation section.

1 is a perspective view of a heater according to an embodiment of the present invention; FIG. FIG. FIG. FIG. FIG. FIG.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a burner section which receives combustion air from a combustion fan 2 and fuel from a fuel supply means (not shown) and burns them to generate combustion gas.

Reference numeral 3 denotes a rectangular column-shaped combustion tube located above the burner section 1 and connected to the burner section 1, with a flat, central-shaped heat dissipation section 4 connected to the upper part.
The rear side of this heat dissipation section 4 protrudes slightly outward and has a combustion gas inlet 5 at the center of the rear side, toward the lower front side, and an outlet 6 is provided at one end of the rear side, which in this embodiment is on the right side.

Reference numeral 7 denotes a horizontally elongated partition plate located in the center to divide the heat dissipation section 4 into front and rear sections, and consists of a central flat section 8 and upper and lower bent sections, an upper bent section 9 above the flat section 8 and a lower bent section 10 below the flat section 8.
As a means for ventilating the combustion gas from the inlet 5, a plurality of small holes 11 with a diameter of 5 mm are formed near the inlet 5 in the center of the flat portion 8, a plurality of small holes 12 with a diameter of 4 mm are formed on the outlet 6 side on the left side, and a plurality of small holes 13 with a diameter of 12 mm are formed on the combustion gas return side on the right side.

In addition, no small holes are formed in the upper bent portion 9 as ventilation means, but multiple small holes 11 with a diameter of 5 mm are formed near the central inlet 5 in the lower bent portion 10 as ventilation means, multiple small holes 12 with a diameter of 4 mm are formed on the outlet 6 side on the left side, and multiple small holes 14 with a diameter of 7 mm are formed on the combustion gas return side on the right side.

Furthermore, among the small holes 13 with a diameter of 12 mm formed on the right side of the flat surface portion 8 on the return side of the combustion gas, the small holes 13 located in the bead portion 21 formed in the middle and lower tiers of the bead portion 21 formed in a convex cross section on the front side of the heat dissipation portion 4 described later have a burring portion 15 formed by burring the periphery of the hole to be convex toward the front.

The partition plate 7 is supported at three points within the heat dissipation section 4, and is fixed at the lower central end with a single spot weld 16. When viewed from the front, a wire mesh (not shown) made of a highly heat-resistant iron-chromium-aluminum alloy with 33 mesh and wire diameter of φ0.29 is folded over at the upper left and right ends and fixed with spot welding to cover the upper back end. The left support bracket 17 and right support bracket 18 are supported from above these two wire meshes so that they do not normally come into contact with each other, and only come into multiple point contact with the intersections of the woven wire mesh when they expand due to heating. The other end of the left support bracket 17 is welded to the side of the partition plate 7 within the heat dissipation section 4, and the other end of the right support bracket 18 is welded to the top of the partition plate 7 within the heat dissipation section 4.

The left and right ends of the partition plate 7 are both bent to form a right bent section 19 and a left bent section 20. The left bent section 20 on the outlet 6 side has a longer bent length than the right bent section 19, narrowing the space through which the combustion gas passes, while the right bent section 19 on the opposite side of the outlet 6 has a shorter bent length than the left bent section 20, widening the space through which the combustion gas passes.

?On the other hand, far-infrared paint is applied to the front side of the heat dissipation section 4 as a heat dissipation surface to radiate far-infrared rays, and multiple bead sections 21 are formed in upper, middle, and lower sections for reinforcement. The front side of the heat dissipation section 4 is formed with an uneven cross section, and the part with a convex cross section at the front of the front side of the heat dissipation section 4 forms the bead section 21.

22 is a heat exchanger through which the combustion gas flows after passing through the heat dissipation section 4. It is located on the back of the heat dissipation section 4 and is composed of multiple pipes arranged in parallel. By passing the heated combustion gas through the heat dissipation section 4, the air blown by the convection fan (not shown) is exchanged with heat and released into the room as warm air.

?23 is a large sight hole formed on the front of the combustion tube 3, through which the blue flame formed by combustion in the burner section 1 can be seen.
Reference numeral 24 denotes an operating unit provided on the upper front part of the device body 25 , 26 denotes a display unit that displays the operation contents and operating status of the operating unit 24 , and 27 denotes a guard body that covers the front part of the device body 25 .

Next, the operation of this embodiment will be described.
Now, the combustion gas generated by combustion in the burner section 1 flows from the combustion tube 3 through the inlet 5 into the heat radiating section 4 .
At this time, the entire surface of the flat portion 8 of the partition plate 7 is positioned at equal intervals with the entire front surface of the heat dissipation portion 4, so that the small holes 11, 12, and 13 as ventilation means of the partition plate 7 are positioned at equal intervals with the entire front surface of the heat dissipation portion 4, so that heat is transmitted to the entire front surface of the heat dissipation portion 4.

The combustion gas is divided into combustion gas that flows from the inlet 5 toward the outlet 6, as indicated by the arrow A in Figure 5; combustion gas that flows from the inlet 5 toward the outlet 6 after passing through the small holes 11, 12, 13, and 14, which are the ventilation means of the partition plate 7, as indicated by the arrow B; and combustion gas that flows from the inlet 5 to the opposite end of the outlet 6 without passing through the small holes 11, 12, 13, and 14, which are the ventilation means of the partition plate 7, and then turns around the partition plate 7 and flows toward the outlet 6, as indicated by the arrow C.

The combustion gas indicated by the arrow A heats the area from the inlet 5 to the outlet 6 of the partition plate 7, and as it flows from the inlet 5 to the outlet 6, some of the combustion gas passes through the small holes 11 and 12 in the partition plate 7 and flows to the front surface of the heat dissipation section 4, heating the area from the center of the front surface of the heat dissipation section 4 to the outlet 6.

Here, the left bend 20 on the outlet 6 side of the partition plate 7 has a longer bend length than the right bend 19, narrowing the space through which the combustion gas passes, making it difficult for the combustion gas to flow from the inlet 5 to the outlet 6. This reduces the shortcut of the combustion gas from the inlet 5 to the outlet 6, and allows the combustion gas to flow to the end of the partition plate 7 opposite the outlet 6, thereby efficiently heating the entire heat dissipation section 4.

In addition, the small holes 12 near the outlet 6 of the partition plate 7 are smaller than the small holes 11 near the inlet 5, so that the combustion gas passing through the small holes 12 in the portion of the partition plate 7 from the inlet 5 to the outlet 6 is suppressed, and the combustion gas passing through the small holes 12 near the outlet 6 of the partition plate 7 and taking a shortcut to the outlet 6 is reduced, so that the combustion gas flows to the end opposite the outlet 6 of the partition plate 7, and the entire heat dissipation section 4 is heated efficiently.

In addition, the combustion gas indicated by the arrow B heats the area near the inlet 5 of the partition plate 7, passes through the small holes 11 near the inlet 5 of the partition plate 7, and flows to the front of the heat dissipation section 4, heating the area near the center of the front of the heat dissipation section 4.

Furthermore, the combustion gas indicated by the arrow C heats the area from the inlet 5 to the opposite end of the outlet 6 of the partition plate 7, and as it flows from the inlet 5 to the opposite end of the outlet 6, a portion of the combustion gas passes through the small holes 11, 13, and 14 of the partition plate 7 and flows to the front surface of the heat dissipation section 4, heating the area from the center of the front surface of the heat dissipation section 4 to the opposite end of the outlet 6.

Furthermore, the small holes 13 located near the end opposite the outlet 6 of the partition plate 7 and in the upper part of the bead section 21 formed on the front side of the heat dissipation section 4 allow the combustion gas to pass through more easily than the small holes 13 located in the middle and lower parts of the bead section 21, heating the upper part of the bead section 21. On the other hand, the small holes 13 located near the end opposite the outlet 6 of the partition plate 7 and in the middle and lower parts of the bead section 21 formed on the front side of the heat dissipation section 4 allow the combustion gas to pass through less easily than the small holes 13 located in the upper part of the bead section 21. Therefore, the small holes 13 are formed into a convex burring 15 by burring processing or the like, and the tip of the burring part 15 of the small holes 13 is brought closer to the bead section 21 side. Therefore, the bead section 21 near the end opposite the outlet 6 of the heat dissipation section 4, which is least exposed to the combustion gas, is also sufficiently exposed to the combustion gas and heated, and the entire heat dissipation section 4 can be kept at a uniform temperature.

As described above, the small holes 11, 12, 13, and 14, which are ventilation means formed in the partition plate 7 of the heat dissipation section 4, have a larger hole diameter as they move away from the outlet 6 side, and the small hole 13 near the end opposite the outlet 6 is formed with a convex burring section 15 around the hole. As a result, more combustion gas passes through the small holes 11, 12, 13, and 14 as it moves away from the outlet 6 side, and the entire heat dissipation section 4 is heated evenly. Furthermore, the combustion gas is guided to the burring section 15, which is formed in a convex shape around the small hole 13, and hits the heat dissipation section 4 in front of the small hole 13. This prevents the occurrence of temperature unevenness in the heat dissipation section 4, and efficiently heats the entire heat dissipation section 4 to increase the radiation amount of the heat dissipation section 4.

In addition, the partition plate 7 is formed to have a shape with a central flat portion 8, an upward bent portion 9 above the flat portion 8, and a downward bent portion 10 below the flat portion 8. By forming the partition plate 7 on the flat portion 8, the small holes 11, 12, and 13 are all evenly close to the heat dissipation portion 4. Furthermore, the burring portion 15, which is formed in a convex shape around the small hole 13, is closer to the heat dissipation portion 4. This allows the combustion gas to hit the entire heat dissipation portion 4, preventing uneven temperature distribution in the heat dissipation portion 4, and efficiently heats the entire heat dissipation portion 4, thereby increasing the radiation amount of the heat dissipation portion 4.

In addition, the front side of the heat dissipation section 4 is formed with an uneven cross section, and the burring section 15 of the small hole 13 with a convex periphery is located in the convex cross section on the front side of the heat dissipation section 4. Therefore, by forming the front side of the heat dissipation section 4 with an uneven cross section, the strength of the heat dissipation section 4 is increased, and by positioning the small hole 13 with a convex periphery in the convex cross section on the front side of the heat dissipation section 4, the combustion gas from the small hole 13 with a convex periphery hits the convex cross section on the front side of the heat dissipation section 4 and is heated, preventing the occurrence of temperature unevenness in the heat dissipation section 4, and efficiently heating the entire heat dissipation section 4 to increase the radiation amount of the heat dissipation section 4.

In addition, both ends of the partition plate 7 are folded to form bent sections, and the left bent section 20 on the outlet 6 side is made larger than the right bent section 19 on the opposite side of the outlet 6. This makes it difficult for the combustion gas to take a shortcut by making the left bent section 20 on the outlet side larger, and by making the right bent section 19 on the opposite side of the outlet 6 smaller, the combustion gas that has flowed to the opposite side of the outlet 6 can easily flow around the end of the partition plate 7 and toward the outlet 6. This prevents temperature unevenness in the heat dissipation section 4, and efficiently heats the entire heat dissipation section 4 to increase the amount of radiation from the heat dissipation section 4.

1 burner section 4 heat dissipation section 5 inlet 6 outlet 7 partition plate 11, 12, 13, 14 small hole 15 burring section

Claims (4)

A heater comprising a heat dissipation section that dissipates heat by circulating the combustion gas generated by the combustion of the burner section, and a partition plate that separates the front side that serves as the heat dissipation surface within the heat dissipation section from the rear side that has an inlet and outlet for the combustion gas, the inlet being provided in the center of the rear side and the outlet being provided at one end of the rear side, and the partition plate being formed with a ventilation means consisting of a number of small holes, the small holes of the ventilation means having a larger diameter as they move away from the outlet side, and the small holes near the end opposite the outlet have a burring portion that is formed in a convex shape toward the front around the hole. The heater according to claim 1, characterized in that the partition plate is formed in a shape having a central flat portion and bent portions above and below it, and the small hole having the burring portion formed in a convex shape around the hole is formed in the flat portion. The heater according to claim 2, characterized in that the front side of the heat dissipation section is formed with an uneven cross section, and the small hole having the burring section formed in a convex shape around the hole is located in the front part of the cross section that is convex forward on the front side of the heat dissipation section. The heater according to claim 3, characterized in that the left and right ends of the partition plate are folded to form a folded portion, and the folded portion on the outlet side is larger than the folded portion on the opposite side of the outlet.

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