Heater

Abstract

To provide a heater which certainly prevents a heat radiation part from performing uneven heating.SOLUTION: Small holes 11, 12 and 13, which are ventilation means formed on a partition plate of a heat radiation part 4, make their diameters larger as separated away from an outlet 6 side, and also have a protrusion 14 which protrudes forward in a convex shape and is disposed in a lower part of an end of the opposite side of the outlet 6 of the partition plate 7; therefore, combustion gas passing through the small holes increases as separated away from the outlet 6 side and the whole heat radiation part 4 is evenly heated; furthermore, the combustion gas is guided to the extrusion 14 extruding forward in the convex shape to come into contact with the heat radiation part 4 in front of the small hole 13 disposed on the extrusion 14, and thereby, having the combustion gas brought into contact with the lower part of the opposite side of the outlet 6 of the heat radiation part 4 prevents temperature unevenness of the heat radiation part 4 from occurring; and the whole heat radiation part 4 is efficiently heated to enable an increase in the radiation quantity of the heat radiation part 4.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a heater that heats a room with combustion gas produced by combustion in a burner section. [Background technology]

[0002] Conventionally, this type of device has had a burner section installed directly in the heat dissipation section, and the front surface of the flat, box-shaped heat dissipation section is heated to dissipate heat. However, since 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 is also a risk of burnout in areas where heat is concentrated.

[0003] Therefore, a ventilation means consisting of a number of 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, and the small holes are formed so that the center portion facing the inlet for the combustion gas is dense and the end portion facing the outlet is sparse, or the small holes in the center portion facing the inlet are larger than the small holes facing the outlet (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-298194 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in this conventional device, the inlet for combustion gas to flow into the heat dissipation section is located in the center of the heat dissipation section, and the outlet for letting the combustion gas that has flowed into the heat dissipation section 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 results in temperature unevenness in the heat dissipation section, making it difficult to increase the amount of radiation from the heat dissipation section.

[0006] In addition, the partition plate becomes hot due to the combustion gases, and as the plate undergoes repeated high and low temperatures during operation, thermal deformation occurs. To prevent this, the partition plate needs to be bent in at least one location in the lateral direction.

[0007] Therefore, if a horizontal bend is provided in the middle of the partition plate, the distance between the partition plate and the front side of the heat dissipation section increases from the middle bend toward the upper or lower end.In particular, the lower end of the end facing the outlet on the front side of the heat dissipation section has the problem that the temperature is low because it is difficult for combustion gas to flow therethrough and the distance to the small holes in the partition plate is also large.

[0008] Furthermore, if the number of places where the partition plate is bent laterally in order to reduce the area where the distance between the partition plate and the front side of the heat dissipation section is large is increased, there is a problem that the processing becomes complicated and the cost of the parts increases. [Means for solving the problem]

[0009] In order to solve the above problems, claim 1 of the present invention provides a heater comprising a heat dissipation section which dissipates heat by circulating the combustion gas generated by combustion in the burner section, and a partition plate which separates the 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, the small holes of the ventilation means having larger diameters as they move away from the outlet side, and a protrusion being provided at the bottom of the end of the partition plate opposite the outlet.

[0010] In addition, in claim 2, the partition plate has a horizontally elongated shape with a horizontal 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. Effect of the Invention

[0011] According to claim 1 of this invention, the small holes serving as ventilation means formed in the partition plate of the heat dissipation section have a larger diameter as they move away from the outlet side, and a protruding portion is provided at the lower part of the end of the partition plate opposite the outlet.This brings the lower part of the end facing the outlet on the front side of the heat dissipation section close to the small holes in the partition plate so that the combustion gas can sufficiently hit them, raising the temperature of the lower part of the end of the partition plate opposite the outlet, and preventing temperature unevenness in the heat dissipation section.

[0012] In addition, according to claim 2, the partition plate has a horizontally elongated shape with a horizontal bent portion formed in the center, and the small hole formed in the protruding portion has a burred portion formed in a convex shape toward the front around the hole.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 burred portion of the small hole in the partition plate so that the combustion gas can sufficiently hit them, 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. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of a heater according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] 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.

[0015] ?3 is a rectangular columnar combustion tube located above the burner section 1 and connected to the burner section 1, and is connected to a flat, central-shaped heat dissipation section 4 at the top. The rear side of the heat dissipation section 4 protrudes slightly outward and has a combustion gas inlet 5 located toward the lower 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.

[0016] 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. The partition plate has a horizontal bent portion 8 in the center and is made up of an upper surface portion 9 above the bent portion 8 and a lower surface portion 10 below the bent portion 8.

[0017] In addition, as a ventilation means for 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 upper surface 9 and the lower surface 10, 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.

[0018] 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 6 and has a number of small holes 13 with a diameter of 12 mm formed therein.

[0019] Furthermore, the small hole 13 in the protruding portion 14 has a burring portion 15 formed by burring the periphery of the hole into a forward convex shape.

[0020] In addition, the partition plate 7 is supported at three points within the heat dissipation section 4 and is fixed with a single spot weld 16 at the lower central end, and at the upper left and upper right ends when viewed from the front, a wire mesh (not shown) of 33 mesh, wire diameter φ0.29, and made of a highly heat-resistant iron-chromium-aluminum alloy is folded back and covered to the upper back end and fixed with spot welding.The partition plate 7 is supported by a left support bracket 17 and a right support bracket 18 so that it is not in contact with the intersections of the woven wire mesh under normal conditions and comes into multiple point contact with the intersections of the woven wire mesh only when it expands 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 above of the partition plate 7 within the heat dissipation section 4.

[0021] In addition, the left and right ends of the partition plate 7 are both folded to form a right folding portion 19 and a left folding portion 20. The left folding portion 20 on the outlet 6 side has a longer bending length than the right folding portion 19 to narrow the space through which the combustion gas passes, and the right folding portion 19 on the opposite side of the outlet 6 has a shorter bending length than the left folding portion 20 to widen the space through which the combustion gas passes.

[0022] 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 rows for reinforcement, and the front side of the heat dissipation section 4 is formed with an uneven cross section, and the portion with a convex cross section at the front of the front side of the heat dissipation section 4 forms the bead section 21.

[0023] ?22 is a heat exchanger through which the combustion gas flows after passing through the heat dissipation section 4. It is located on the rear of the heat dissipation section 4 and is composed of multiple pipes arranged in parallel. By circulating 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.

[0024] ?23 is a large observation window 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 of the device body 25.

[0025] 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 .

[0026] The combustion gas is divided into combustion gas flowing from the inlet 5 toward the outlet 6, as indicated by arrow A in Figure 5; combustion gas flowing from the inlet 5 toward the outlet 6 after passing through the small holes 11, 12, and 13, which are ventilation means in the partition plate 7, as indicated by arrow B; and combustion gas flowing from the inlet 5 to the opposite end of the outlet 6 without passing through the small holes 11, 12, and 13, which are ventilation means in the partition plate 7, and then turning around the partition plate 7 and flowing toward the outlet 6, as indicated by arrow C.

[0027] The combustion gas indicated by arrow A heats the area from inlet 5 to outlet 6 of partition plate 7, and as it flows from inlet 5 to outlet 6, some of the combustion gas passes through small holes 11, 12 in partition plate 7 and flows to the front surface inside heat dissipation section 4, heating the area from the center of the front surface of heat dissipation section 4 to outlet 6.

[0028] Here, the left bent portion 20 on the outlet 6 side of the partition plate 7 has a longer bending length than the right bent portion 19, thereby narrowing the space through which the combustion gas passes. This makes it difficult for the combustion gas to flow from the inlet 5 to the outlet 6, thereby reducing the shortcut of the combustion gas from the inlet 5 to the outlet 6 and allowing 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.

[0029] 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 shortcut to the outlet 6 by passing through the small holes 12 near the outlet 6 of the partition plate 7 is reduced, so that the combustion gas flows to the end opposite the outlet 6 of the partition plate 7, thereby efficiently heating the entire heat dissipation section 4.

[0030] In addition, the combustion gas indicated by the arrow B heats the area near the inlet 5 of the partition plate 7, passes through small holes 11 near the inlet 5 of the partition plate 7, and flows to the front surface inside the heat dissipation section 4, heating the area near the center of the front surface of the heat dissipation section 4.

[0031] In addition, the combustion gas indicated by 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 of the partition plate 7 and flows to the front surface inside 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.

[0032] Furthermore, a protruding portion 14 that protrudes forward in a convex shape is provided at the lower end of the partition plate 7 opposite the outlet 6, and a burring portion 15 that is formed in a convex shape toward the front is provided around the small holes 13 formed in the protruding portion 14.Therefore, in order to prevent thermal deformation while not increasing the cost of parts, the partition plate 7 is bent upward in the lateral direction at only one location, and the small holes 13 in the partition plate are brought close to the lower end of the front side of the heat dissipation section 4 that faces the outlet 6, where the combustion gas is less likely to flow and where the distance to the small holes 13 in the partition plate is large, so that the combustion gas can be 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.

[0033] As described above, the small holes 11, 12, and 13 serving as 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 is provided at the lower end of the partition plate 7 opposite the outlet 6, which protrudes forward in a convex shape. Around the holes of the small holes 13 formed in the protruding portion 14, there is a burring portion 15 formed in a convex shape toward the front. As a result, the amount of combustion gas passing through the small holes 11, 12, and 13 increases as the distance from the outlet 6 side increases, and the entire heat dissipation section 4 is heated evenly. Furthermore, the combustion gas is guided to the burring portion 15 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. As a result, the combustion gas hits the part of the heat dissipation section 4 opposite the outlet 6 of the heat dissipation section 4, preventing the occurrence of temperature unevenness in the heat dissipation section 4. The entire heat dissipation section 4 is efficiently heated, thereby increasing the radiation amount of the heat dissipation section 4.

[0034] 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. Therefore, the left bent section 20 on the outlet side, which is made larger, makes it difficult for the combustion gas to take a shortcut, and the right bent section 19 on the opposite side of the outlet 6 is made smaller, so that the combustion gas that has flowed to the opposite side of the outlet 6 tends to go around the end of the partition plate 7 and flow toward the outlet 6. This prevents temperature unevenness in the heat dissipation section 4 and efficiently heats the entire heat dissipation section 4, thereby increasing the amount of radiation from the heat dissipation section 4. [Explanation of symbols]

[0035] 1 Burner section 4 Heat dissipation part 5 Inlet 6 Outlet 7 Partition 11, 12, 13 small hole 14. Overhang

Claims

1. 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.

2. The heater according to claim 1, characterized in that the partition plate has a horizontally elongated shape with a horizontal 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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