JP5146055B2 - Hot air heater louver structure - Google Patents

Description

  The present invention relates to a structure of a louver attached to a hot air outlet of a hot air heater.

  The frame of the hot air heater has an air passage that communicates between the back and the front, and a convection fan that blows indoor air is attached to the back of the frame that serves as the inlet of the air passage. A warm air outlet from which air sent to the air passage blows is provided on the front surface. And since the heat radiation part of the burner installed in the frame is arranged in the air passage, the air blown into the air passage by the convection fan exchanges heat with the combustion heat from the burner or the combustion chamber following the burner. It becomes high temperature by mixing with the high-temperature combustion gas sent from a combustion chamber to a ventilation path, and it blows and heats from a warm air blower outlet.

Conventional hot air heaters have multiple louvers that are finished in a specified shape one by one and are attached to the hot air outlet by welding or caulking, etc., so there are many parts and the time and cost required for processing and assembly It took a lot of time and the productivity was poor and the cost was high. For this reason, the applicant has proposed a structure in which two flat bases are arranged side by side on the front and rear sides of the hot air outlet, and a single louver is formed by a number of horizontally elongated cuts formed on each base (Patent Document). 1).
JP-A-2005-282900

  In the above patent document, the front base constituting the front louver is attached to the front plate of the frame body, the rear base constituting the rear louver is attached to the outlet of the air passage, and the front plate is attached to the front opening of the frame body. In some cases, the rear edge of the front louver and the front edge of the rear louver are connected to form an integral louver. In this structure, the front and rear louver connections are located between the outlet of the air passage and the hot air outlet, but if the front and rear bases are misaligned during assembly, there will be a gap in the front and rear louver connections. The warm air that flows from the outlet of the air passage to the hot air outlet may flow into the frame through this gap, which may cause a decrease in the amount of air blown from the hot air outlet and an increase in the temperature of the frame. all right.

The present invention solves the above-described problem. A burner 2 is disposed in the frame 1, and a blower passage 4 for guiding combustion heat from the combustion chamber 3 following the burner 2 is provided. An indoor convection fan 5 is attached to the rear side of the frame 1 so as to pass through the inlet of the air passage 4, and a hot air outlet 6 serving as an outlet of the air passage 4 is provided on the front plate of the frame 1, and the indoor convection is provided. The room air blown into the blower passage 4 by the fan 5 becomes high temperature and blows out into the room from the hot air outlet 6 on the front plate of the frame 1, and the hot air outlet 6 has a predetermined direction of hot air. In the hot air heater provided with a plurality of louvers to be determined, the louver is arranged in front of the outlet 4a of the air passage 4, and the front side of the frame body 1 is cut by a center portion of one flat plate. An inner louver 7 composed of a large number of bent portions formed toward
The inner louver 7 is arranged in front of the inner louver 7 and is composed of an outer louver 8 composed of a large number of bent portions formed toward the inner side of the frame 1 by cutting at the center of one flat plate. Is formed on the front surface of the flat plate constituting the outer louver 8 on the front surface of the flat plate constituting the outer louver 8, and the rear surface of the flat plate constituting the outer louver 8 is centered according to the shape of the convex portion 7a. When the inner louver 7 and the outer louver 8 are overlapped with each other, the front edge of the inner louver 7 and the rear edge of the outer louver 8 are continuous. In addition, the convex portion 7a on the front surface of the inner louver 7 is fitted into the concave portion 8a on the rear surface of the outer louver 8 to constitute an integral louver.

  In addition, a fixing means 9 is provided between the outer peripheral portion 8b of the outer louver 8 and the outlet 4a of the air passage 4, and the inner louver 7 and the outer louver 8 are configured to be integrated and integrated. By attaching to the outlet 4a and fixing to the outlet 4a of the air passage 4 by the fixing means 9, an integral louver can be configured in a state where the convex portion 7a of the inner louver 7 and the concave portion 8a of the outer louver 8 are securely fitted. .

  Further, a step 8c is formed between the flat plate concave portion 8a and the outer peripheral portion 8b constituting the outer louver 8 in accordance with the shape of the outer peripheral portion 7b of the inner louver 7, and the convex portion 7a on the front surface of the inner louver 7 is formed. Is fitted into the recess 8a on the back surface of the outer louver 8, and the outer peripheral portion 7b of the inner louver 7 is fitted into the step portion 8c of the outer louver 8 to form an integral louver. Is surrounded by the inside of the outer peripheral portion 8 b of the outer louver 8, and a seamless louver structure can be configured between the outlet 4 a of the air passage 4 and the hot air outlet 6.

  The inner louver 7 is composed of a large number of bent portions having a substantially L-shaped cross section, and the outer louver 8 is composed of a large number of bent portions having a substantially U-shaped or U-shaped cross section. A groove 10 is formed on the back surface of the inner louver 7, and the convex portion 7 a on the front surface of the inner louver 7 is fitted in the concave portion 8 a on the rear surface of the outer louver 8, and the front edge of the inner louver 7 is the groove 10 of the outer louver 8. The outer louver 8 and the inner louver 7 are overlapped with each other to form a double louver, and the strength of the louver can be improved.

  In the present invention, a convex portion 7 a is formed at the center of the front surface of the inner louver 7 disposed in front of the outlet 4 a of the air passage 4, and the rear surface of the outer louver 8 disposed in front of the frame body 1 of the inner louver 7. When the concave portion 8a is formed in the central portion and the inner louver 7 and the outer louver 8 are overlapped, the convex portion 7a of the inner louver 7 is fitted into the concave portion 8a of the outer louver 8 to constitute an integral louver. Even if the connecting portion of the inner louver 7 and the outer louver 8 is located between the outlet 4a of the air passage 4 and the hot air outlet 6, no gap is generated in the connecting portion, and the outlet of the air passage 4 The hot air coming out of 4a can be reliably blown out from the hot air outlet 6 without flowing into the frame 1.

  Further, the inner louver 7 and the outer louver 8 are integrally formed by overlapping each other, attached to the outlet 4a of the air passage 4, and fixed by the fixing means 9, so that the convex portion 7a of the inner louver 7 and the concave portion 8a of the outer louver 8 are fixed. Can be fixed in a state of being securely fitted, so that a louver structure without a gap can be realized at the connecting portion between the inner louver 7 and the outer louver 8, and the inner louver 7 and the outer louver 8 can be fixed simultaneously. Assembling work was easy and productivity was improved.

  Further, a step portion 8 c is formed between the concave portion 8 a and the outer peripheral portion 8 b of the outer louver 8, and when the inner louver 7 and the outer louver 8 are overlapped, the convex portion 7 a of the inner louver 7 becomes the concave portion 8 a of the outer louver 8. The inner louver 7 and the outer louver 8 are connected to the outlet 4a of the air passage 4 by fitting the inner louver 7 into the stepped portion 8c to form an integral louver. Since the entire inner louver 7 is surrounded by the inner side of the step portion 8c of the outer louver 8 when the louver is attached, the joint between the inner louver 7 and the outer louver 8 is completely between the outlet 4a of the air passage 4 and the hot air outlet 6. The hot air can be reliably blown out from the hot air outlet 6.

  The inner louver 7 is formed by a large number of bent portions having a substantially L-shaped cross section, and the outer louver 8 is formed by a large number of bent portions having a substantially U-shaped or U-shaped cross section. Since the front edge of the inner louver 7 is fitted in the groove 10 formed on the back surface, the outer louver 8 has a shape that is difficult to deform, and the inner louver 7 and the outer louver 8 form a double structure. The deformation of was difficult to occur.

  The present invention will be described with reference to the embodiments shown in the drawings. 1 is a frame of a warm air heater, 2 is a burner disposed in the frame 1, 11 is a wind tunnel to which combustion air is sent, and 12 is in the wind tunnel 11. The bottomed cylindrical pot 12a is provided with a large number of small-diameter air holes provided in the side wall of the pot 12 so that combustion air can be supplied from the wind tunnel 11, and the main body of the burner 2 is composed of the wind tunnel 11 and the pot. 12. Reference numeral 13 denotes a combustion blower for supplying combustion air to the pot 12, and the combustion air sent to the wind tunnel 11 by the combustion blower 13 is supplied into the pot 12 through the small-diameter air holes 12 a.

  14 is a fuel tank for storing fuel to be supplied to the pot 12, 15 is a fuel pump composed of an electromagnetic pump attached to the upper surface of the fuel tank 14, 16 is a fuel pipe provided between the pot 12 and the fuel pump 15, and 17 is fuel. An oil feed nozzle constituted by a tip of the pipe 16 extending into the pot 12, and fuel is supplied from the oil feed nozzle 17 extended into the pot 12 so as to penetrate the wind tunnel 11 and the side wall of the pot 12. To be supplied.

  18 is a preheating ignition heater attached from the side wall of the pot 12 through the bottom surface of the pot 12, 19 is an auxiliary combustion member installed in the pot 12, and 3 is a combustion chamber arranged above the pot 12. The fuel supplied into the pot 12 is vaporized at the ignition heater 18 and the bottom surface of the pot 12 heated to high temperature by the combustion heat, and the combustion air supplied from the small-diameter air hole 12a and the auxiliary combustion member 19 are started while starting the initial combustion. They are mixed by action and burned completely in the combustion chamber 3.

  4 is an air passage arranged through the front and rear of the frame 1 so as to surround the combustion chamber 3, 4 a is an outlet of the air passage 4, and 5 is an indoor convection provided at the inlet of the air passage 4 on the back side of the frame 1. Fans 6 are hot air outlets formed at the outlet of the air passage 4 on the front side of the frame 1, the combustion chamber 3 opens into the air passage 4, and the combustion gas completely burned in the combustion chamber 3 is the air passage 4. The indoor air and combustion gas blown into the air blowing path 4 by the indoor convection fan 5 are mixed in the air blowing path 4 and blown into the room as hot air from the hot air outlet 6.

  7 is an inner louver disposed in front of the outlet 4a of the air passage 4 in the frame 1, 8 is an outer louver disposed in the warm air outlet 6 in front of the inner louver 7, and the inner louver 7 and outer louver 8 are respectively It is composed of a large number of bent portions formed by cutting in the center of one flat plate, the bent portion of the inner louver 7 is directed to the front side of the frame body 1, and the bent portion of the outer louver 8 is a frame body. 1, the front edge of the bent portion of the inner louver 7 and the rear edge of the bent portion of the outer louver 8 are continuous to form an integral louver.

This louver structure can be easily manufactured by pressing, and can be composed of two parts, the inner louver 7 and the outer louver 8. Therefore, the number of parts is small, and the time and cost required for processing and assembly can be greatly reduced. Cost can be reduced.
In addition, in order to control the flow of warm air with the louver, it is necessary to arrange a large number of louvers having a certain length in the front-rear direction. However, in the louver structure constituted by the bent portions of the flat plate, it is formed with the dimensions of the flat plate. The length and number of louvers that can be produced are determined, but the problem of the length of the louvers in the front-rear direction and the number of louvers can be solved by arranging two inner louvers 7 and two outer louvers 8 as described above. Can do.

  However, in this structure, the joint of the connecting portion between the inner louver 7 and the outer louver 8 is located between the outlet 4a of the air passage 4 in the frame 1 and the hot air outlet 6, and there is a gap in this connecting portion. If possible, a part of the warm air flowing from the outlet 4 a of the air passage 4 toward the warm air outlet 6 flows into the frame body 1 from this gap, and the amount of warm air blown out from the warm air outlet 6 is reduced. Since a problem such as an internal temperature rise has been found, it is necessary to devise measures to prevent a gap from being formed in the connecting portion between the inner louver 7 and the outer louver 8.

  The present invention solves the above-mentioned problems, 7a is a convex part in which the central part of the flat plate constituting the inner louver 7 is expanded to the front side of the frame 1, 7b is an outer peripheral part formed around the convex part 7a, 8a Is a recess formed by inflating the central portion of the flat plate constituting the outer louver 8 toward the front surface side of the frame 1, and 8b is an outer peripheral portion formed around the recess 8a. The louver 8 is provided so that the inner diameter dimension of the concave portion 8a coincides. The convex portion 7a and the concave portion 8a are formed by drawing a flat plate, and the inner louver 7 and the outer louver 8 can each be composed of a single flat plate.

  When the outer louver 8 is overlapped in front of the inner louver 7, the convex portion 7a of the inner louver 7 is fitted into the concave portion 8a of the outer louver 8, and the outer surface of the convex portion 7a and the inner side surface of the concave portion 8a are in close contact with each other. The bent portion of the inner louver 7 and the bent portion of the outer louver 8 are located in the space between the front surface of the convex portion 7a of the inner louver 7 and the rear surface of the recessed portion 8a of the outer louver 8, and the inner louver 7 is located in the recessed portion 8a. The front edge of the bent portion and the rear edge of the bent portion of the outer louver 8 are continuous to form an integral louver.

For this reason, even in a structure in which the connection portion between the inner louver 7 and the outer louver 8 is located between the outlet 4 a of the air passage 4 and the hot air outlet 6, the outer surface of the convex portion 7 a of the inner louver 7 is the inner surface of the outer louver 8. Because of this, there is no gap between the inner louver 7 and the outer louver 8 where hot air flows out.
Further, the warm air that has exited from the outlet 4a of the air passage 4 and sent into the convex portion 7a of the inner louver 7 passes through the opening of the inner louver 7 and into the concave portion 8a of the outer louver 8, and at this time, the outer louver 8 is formed so as to surround the outer surface of the convex portion 7a of the inner louver 7 and extends forward from the outer side of the convex portion 7a. The air can be blown out from the hot air outlet 6 without going to the connecting portion between the inner louver 7 and the outer louver 8.
For this reason, the warm air does not flow out into the frame body 1 from the outlet 4a of the air passage 4 toward the warm air outlet 6, and the temperature inside the frame body 1 and the air volume do not decrease.

  In the above configuration, the inner louver 7 and the outer louver 8 may be separately attached to the outlet 4a of the air passage 4 and the warm air outlet 6 of the front plate of the frame 1 as in the conventional case. Since the inner louver 7 and the outer louver 8 can be integrally configured by fitting the convex portion 7a of the outer louver 8 with the concave portion 8a of the outer louver 8, the louver composed of these two parts is integrated in advance. You may attach to the exit 4a of the ventilation path 4. FIG. Reference numeral 9 denotes a fixing means for fixing the integrally configured inner louver 7 and outer louver 8 to the outlet 4a of the air passage 4, and the air passage 4 in a state where the inner louver 7 and the outer louver 8 are integrally configured. The inner louver 7 and the outer louver 8 can be fixed together, so that the assembling process can be simplified and the convex portion 7a of the inner louver 7 and the outer louver 8 can be fixed together. The fitting property with the recess 8a can be increased.

8c is a step provided between the flat plate concave portion 8a and the outer peripheral portion 8b constituting the outer louver 8, and the inner diameter of the step 8c and the outer diameter of the outer peripheral portion 7b of the inner louver 7 substantially coincide with each other. When the inner louver 7 and the outer louver 8 are overlapped, the convex portion 7a of the inner louver 7 is fitted into the concave portion 8a of the outer louver 8, and the outer peripheral portion 7b of the inner louver 7 is fitted to the outer louver 8. It fits in the step part 8c.
At this time, if the outer louver 7 and the outer louver 8 are set to have different shapes on the upper and lower sides of the outer peripheral portion 7b and the step portion 8c of the outer louver 8, the inner louver 7 and the outer louver 8 can only be fitted in the same direction. It is easy to identify and no mistakes are made during assembly.

  As an example of attaching the outer louver 8 and the inner louver 7 to the outlet 4a of the air passage 4, 9a is a fixing screw which is a fixing means 9, 4b is an attachment surface constituted by a flange formed at the outlet 4a of the air passage 4, and 9b is These are screw holes provided in the outer peripheral portion 7b of the inner louver 7, the step portion 8c of the outer louver 8, and the mounting surface 4b of the air passage 4, and the inner louver 7 and the outer louver 8 which are integrally formed are attached to the air passage 4b. The inner louver 7 and the outer louver 8 can be fixed together by attaching the fixing screw 9a to the screw hole 9b.

  Reference numeral 4c denotes a locking piece provided on the lower mounting surface 4b of the outlet 4a of the blower passage 4, and 8d denotes a locking guide provided at the lower part of the outer peripheral portion 8b of the outer louver 8. By engaging the locking guide portion 8d of the outer louver 8 with the locking piece 4c of the path 4, the mounting operation of the fixing screw 9a can be performed with the louver positioned at the outlet 4a of the air flow path 4. Workability during assembly can be improved.

  As described above, when the inner louver 7 and the outer louver 8 are fixed to the outlet 4a of the air passage 4 by the fixing screw 9a, the outer peripheral portion 8b of the outer louver 8 positioned outside the outer peripheral portion 7b of the inner louver 7 becomes the air passage. 4, the inner louver 7 is entirely surrounded by the inside of the outer peripheral portion 8 b of the outer louver 8, and the outer louver 8 is continuously connected from the outlet 4 a of the air passage 4 to the hot air outlet 6. Since the inner louver 7 is disposed inside the hot air flow path formed by the outer louver 8, the inner air louver 7 is arranged between the outlet 4a of the air passage 4 and the hot air outlet 6. There is no joint between the louver 7 and the outer louver 8, and the outflow of warm air into the frame body 1 can be reliably prevented.

  In the above structure, when the front plate of the frame body 1 is attached, there may be a gap between the inner edge of the hot air outlet 6 of the front plate of the frame body 1 and the outer surface of the outer louver 8. The warm air that has passed through the outlet 4a of the passage 4 flows through the inner louver 7 and the outer louver 8 and blows out toward the front of the frame 1 from the opening of the bent portion of the outer louver 8, so Even if there is a gap between the outer surface of the louver 8, there is no direct relationship with the flow of warm air, and warm air does not flow into the frame 1. No decline will occur.

  When the inner louver 7 and the outer louver 8 are formed of bent plate pieces, the width of the portion left between the openings is thin, so the strength is weak and deformation is likely to occur. For this reason, the strength of the outer louver 8 is improved by configuring the bent piece of the outer louver 8 to have a U-shaped cross-section or U-shape. Reference numeral 10 denotes a groove formed on the back side of the bent piece of the outer louver 8 having a U-shaped cross section or a U-shaped cross section. The inner louver 7 and the outer louver 8 are overlapped so that the convex portion 7a of the inner louver 7 is outside. The front edge of the bent portion of the inner louver 7 is fitted into the groove 10 of the bent portion of the outer louver 8 when fitted into the concave portion 8 a of the louver 8.

Therefore, bent pieces are formed on the upper and lower sides of the portion left between the openings of the outer louver 8 to improve the strength of the outer louver 8, and the front edge of the inner louver 7 is fitted into the groove 10 of the outer louver 8. Then, since the outer louver 8 has a double structure because the bent piece of the outer louver 8 and the front edge of the inner louver 7 overlap each other, the strength of the louver is improved and it becomes difficult to deform.
Further, with this configuration, the front edge of the inner louver 7 does not appear to be hidden behind the outer louver 8 when the air passage 4 is viewed from the front of the frame 1, so that the appearance of the product is not impaired.

It is a longitudinal cross-sectional view of the warm air heater which shows the Example of this invention. It is principal part sectional drawing which shows the Example of this invention. It is a principal part cross-sectional view which shows the Example of this invention. It is a principal part perspective view which shows the assembly structure of the outer louver which comprises the louver of this invention, and an inner louver.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Burner 3 Combustion chamber 4 Air flow path 5 Indoor convection fan 6 Warm air outlet 7 Inner louver 7a Convex part 7b Outer part 8 Outer louver 8a Concave part 8b Outer part 8c Step part 9 Fixing means 10 Groove

Claims (4)

A burner (2) is arranged in the frame (1), a blower passage (4) for guiding combustion heat from the combustion chamber (3) following the burner (2) is provided, and a frame of the blower passage (4) An indoor convection fan (5) is attached to the back side of the body (1) through the inlet of the air passage (4), and the front plate of the frame (1) has a temperature serving as the outlet of the air passage (4). A wind outlet (6) is provided,
The indoor air blown into the air passage (4) by the indoor convection fan (5) becomes hot and is blown into the room from the hot air outlet (6) on the front plate of the frame (1).
In the hot air heater provided with a plurality of louvers that determine the hot air direction in a predetermined direction at the hot air outlet (6),
The louver is
An inner louver that is arranged in front of the outlet (4a) of the air passage (4) and that is formed of a large number of bent portions toward the front side of the frame (1) by cutting at the center of one flat plate. (7) and
It is arranged in front of the inner louver (7) and is constituted by an outer louver (8) comprising a large number of bent portions formed toward the inside of the frame body (1) by cutting at the center of one flat plate. And
On the front surface of the flat plate constituting the inner louver (7), a central portion is formed with a convex portion (7a) located on the front side of the outer peripheral portion (7b),
On the back surface of the flat plate constituting the outer louver (8), a concave portion (8a) is formed such that the central portion is positioned on the front side of the outer peripheral portion (8b) in accordance with the shape of the convex portion (7a).
When the inner louver (7) and the outer louver (8) are overlapped,
The front edge of the inner louver (7) and the rear edge of the outer louver (8) are continuous, and the convex portion (7a) on the front surface of the inner louver (7) is the concave portion (8a on the back surface of the outer louver (8). ) A louver structure for a warm air heater, wherein the louver is configured to fit into the louver.   A fixing means (9) is provided between the outer peripheral part (8b) of the outer louver (8) and the outlet (4a) of the air passage (4), and the inner louver (7) and the outer louver (8) The superposed and integrated structure is attached to the outlet (4a) of the air passage (4) and fixed to the outlet (4a) of the air passage (4) by the fixing means (9). The louver structure of the described hot air heater.   A step portion (8c) is formed between the concave portion (8a) of the flat plate constituting the outer louver (8) and the outer peripheral portion (8b) according to the shape of the outer peripheral portion (7b) of the inner louver (7). The convex portion (7a) on the front surface of the inner louver (7) is fitted in the concave portion (8a) on the rear surface of the outer louver (8), and the outer peripheral portion (7b) of the inner louver (7) is the outer louver. 3. The louver structure for a hot air heater according to claim 2, wherein the louver is fitted into the step (8c) of (8) to constitute an integral louver. The inner louver (7) is composed of a large number of bent portions having a substantially L-shaped cross section,
The outer louver (8) is composed of a number of bent portions having a substantially U-shaped or U-shaped cross section, and a groove (10) is formed on the back surface of the outer louver (8).
The convex portion (7a) on the front surface of the inner louver (7) is fitted into the concave portion (8a) on the rear surface of the outer louver (8), and the front edge of the inner louver (7) is the outer louver (8). The louver structure of the hot air heater according to claim 1, wherein the louver structure is fitted into the groove (10).

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