JP7680982B2 - 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 addition, the partition plate becomes very hot due to the combustion gases, and as the plate is repeatedly operated, it changes temperature between high and low, causing thermal deformation. To prevent this, the plate needs to be bent horizontally in at least one place.

So, if a horizontal bend is provided in the middle of the partition, the distance between the partition and the front side of the heat dissipation section increases from the bend in the middle towards the upper or lower end, and there is a problem that the temperature is low, especially at the lower end of the end facing the outlet on the front side of the heat dissipation section, because it is difficult for the combustion gas to flow and the distance to the small hole in the partition is large.

In addition, if the number of lateral bends on the partition plate is increased in order to reduce the area where the distance between the partition plate and the front side of the heat dissipation section is large, the processing becomes more complicated, which increases the cost of the part.

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 in 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 the rear side, which has an inlet and outlet for the combustion gas, the inlet being located in the center of the rear side and the outlet being located at one end of the rear side, and the partition plate being formed with a ventilation means consisting of multiple small holes, the small holes of the ventilation means having a larger diameter as they move away from the outlet side, and a protruding portion being provided at the bottom of the end of the partition plate opposite the outlet.

In addition, in claim 2, the partition plate has a horizontally elongated shape with a horizontal bend in the center, and the small hole formed in the protruding portion has a burring portion formed in a convex shape toward the front around the hole.

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 a protruding portion is provided at the bottom of the end of the partition plate opposite the outlet, so that the bottom of the end facing the outlet on the front side of the heat dissipation section is brought close to the small holes in the partition plate so that the combustion gas can sufficiently hit them, raising the temperature of the bottom of the end of the partition plate opposite the outlet, and preventing temperature unevenness in the heat dissipation section.

Furthermore, according to claim 2, the partition plate has a horizontally elongated shape with a horizontal bend in the center, and the small hole formed in the protruding portion has a burring portion formed around the hole in a forward-facing shape. This ensures a minimum clearance between the bent portion of the partition plate and the front side of the heat dissipation portion, preventing contact between the bent portion of the partition plate and the front side of the heat dissipation portion even when thermally expanded, while bringing the lower portion of the end portion facing the outlet on the front side of the heat dissipation portion close to the burring portion of the small hole in the partition plate so that the combustion gas can sufficiently hit it, raising the temperature of the lower portion of the end opposite the outlet of the partition plate and preventing temperature unevenness in the heat dissipation portion.

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 located toward the bottom of the front side, which is the center of the rear side, and an outlet 6 is provided at one end of the rear side, which in this embodiment is on the right side.

7 is a horizontally elongated partition plate located in the center to divide the heat dissipation section 4 into front and rear sections. It forms a horizontal bent section 8 in the center and is made up of an upper surface section 9 above the bent section 8 and a lower surface section 10 below the bent section 8.

In addition, as a means for ventilating the combustion gas from the inlet 5, multiple small holes 11 with a diameter of 5 mm are formed near the inlet 5 in the center of the upper surface 9 and the lower surface 10, 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 13 with a diameter of 12 mm are formed on the combustion gas return side on the right side.

Reference numeral 14 denotes a protruding portion which protrudes forward in a convex shape from the lower end of the underside 10 of the partition plate 7 opposite the outlet port 6 and has a plurality of small holes 13 with a diameter of 12 mm formed therein.

Furthermore, the small hole 13 in the protruding portion 14 has a burring portion 15 in which the periphery of the hole is formed into a forward convex shape by burring processing.

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 .

The combustion gas is then 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, and 13, 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, and 13, 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 and 13 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, a protruding portion 14 that protrudes forward is provided at the bottom of the end of the partition plate 7 opposite the outlet 6, and a burring portion 15 that is formed in a forward convex shape is provided around the small holes 13 formed in the protruding portion 14. Therefore, in order to prevent thermal deformation and not increase the cost of parts, the partition plate 7 is bent upward in the lateral direction in one place, and the small holes 13 in the partition plate are brought close to the bottom of the end opposite the outlet 6 on the front side of the heat dissipation section 4, where the combustion gas is less likely to flow and the distance to the small holes 13 in the partition plate is large, so that the combustion gas is guided to the front side of the heat dissipation section 4 for heating, and the entire heat dissipation section 4 can be kept at a uniform temperature.

As described above, the small holes 11, 12, and 13, 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 a protruding portion 14 that protrudes forward is provided at the bottom of the end of the partition plate 7 opposite the outlet 6, and a burring portion 15 that is formed in a forward convex shape around the holes of the small holes 13 formed in the protruding portion 14. Therefore, as the amount of combustion gas passing through the small holes 11, 12, and 13 increases as the distance from the outlet 6 side increases, the entire heat dissipation section 4 is heated evenly. Furthermore, the combustion gas is guided to the burring portion 15 that is formed in a convex shape around the holes of the small holes 13 in the protruding portion 14, and hits the heat dissipation section 4 in front of the small holes 13, so that the combustion gas hits the part of the heat dissipation section 4 opposite the outlet 6, preventing the occurrence of temperature unevenness in the heat dissipation section 4, and the entire heat dissipation section 4 can be efficiently heated 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 small hole 14 overhanging section

Claims (2)

A heater comprising a heat dissipation section which dissipates heat by circulating combustion gas generated by combustion in a burner section, and a partition plate which separates a front side which serves as the heat dissipation surface within the heat dissipation section from a rear side which 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 plurality of small holes, wherein the small holes of the ventilation means have a larger hole diameter as they move away from the outlet side, and a protrusion is provided at the bottom of the end of the partition plate opposite the outlet.
The heater according to claim 1, characterized in that the partition plate has a horizontally elongated shape with a horizontally bent portion formed in the center, and the small hole formed in the protruding portion has a burring portion formed in a convex shape toward the front around the hole.

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