JP4373311B2 - Hot air heater - Google Patents

Description

  The present invention relates to a warm air heater that performs heating by mixing combustion gas generated by combustion of fuel such as kerosene and air for blowing and blowing as warm air.

  Conventionally, in this type of hot air heater, as shown in FIG. 8, 101 is a main body of the hot air heater, 102 is a hot air outlet to which a louver 103 for guiding the hot air is attached, and 104 is a rear air heater. A convection fan attached to the hot air inlet 105 via a fan guard 106, 107 is a blower box communicating the hot air intake 105 and the hot air blower 102, and 108 is a burner head 109 in the blower box 107. A projecting burner portion, 110 is a combustion cylinder that surrounds the burner head 109 to form a combustion space, and 111 is a heat shield disposed in the blower box 7 directly above the combustion cylinder 110. The burner portion 108 is fixed to the bottom of the combustion cylinder substrate 112, and the burner head 109 protrudes from the upper surface of the combustion cylinder substrate 112. The protruding burner head 1 9 combustion liner 110 so as to 囲堯 a is assumed to be fixed to the upper surface of the combustion liner substrate 112.

  The exterior body of the device main body 101 is configured by fixing a front panel 113 covering the front surface, an upper surface plate 114 covering the upper surface, and a rear surface plate 115 covering the side surfaces and the rear surface on a mounting table 116.

  Next, reference numeral 117 denotes a combustion fan that blows combustion air to the burner unit 108 through the blower pipe 118, and is a fixed tank (not shown) in which fuel from a cartridge type tank (not shown) is temporarily stored. Fuel is vaporized by pressure feeding to the burner section 108 through an oil feed pipe (not shown) and an oil feed nozzle (not shown) by an electromagnetic pump, and the vaporized gas and combustion air from the combustion fan 117 are mixed. After that, the air-fuel mixture is burned.

  By the way, in the conventional hot air heater, the dimensions of the combustion cylinder substrate 112 and the blower box 107 are larger than the diameter of the combustion cylinder 110, and the distance from the combustion cylinder 110 to the side surface of the blower box 107 is sufficient. The blown air from the convection fan 104 passed sufficiently between the combustion cylinder 110 and the side surface of the blower box 107, and the side surface of the blower box 107 was not overheated.

  Further, since the distance between the side surface of the blower box 107 and the side surface of the exterior body of the device main body 101 was wide, the side surface of the exterior body of the device main body 101 was not overheated.

  Further, since the size of the blower box 107 is large, the width of the warm air blown out from the blower box 107 is wide, and even when the warm air blows out from the hot air outlet 102 of the device main body 101 to the outside of the device main body 101, the temperature of the hot air is uneven. In the state where there was no hot air, the hot air was blown out spreading over the width of the hot air outlet 102.

  By the way, when the hot air heater is reduced in size, the smaller the device main body 101 is, the smaller the blower box 107 is. Therefore, the distance from the combustion cylinder 110 to the side surface of the blower box 107 is shortened, whereby heat from the combustion cylinder 110 is blown. While being easily transmitted to the side surface of the box 107, it is difficult for the blast air from the convection fan 104 to pass between the combustion cylinder 110 and the side surface of the blast box 107, so that the side surface of the blast box 107 is overheated.

  In addition, by reducing the size of the hot air heater, the distance between the side surface of the blower box 107 and the side surface of the exterior body of the device main body 101 is also narrowed. When the hot air is blown out from the hot air outlet 102 of the device main body 101 and the hot air is blown out from the hot air outlet 102 of the device main body 101, the hot air is discharged from the hot air outlet 102. There was a problem that high-temperature hot air was concentrated and blown out at a portion located near the center of the blower box 107.

  In addition, by downsizing the hot air heater, there is a problem that the secondary flame in the combustion cylinder 110 extends to the vicinity of the outlet of the combustion cylinder 110 and a large amount of nitrogen dioxide is generated by the rapid cooling of the secondary flame. It was.

  In view of this, there is a type in which a windbreak wall protruding above the outlet portion of the combustion cylinder is provided on the wake side of the convection fan in the outlet direction of the combustion cylinder.

JP 04-155152 A

  However, this conventional device has an effect of preventing rapid cooling of the secondary flame and preventing a large amount of nitrogen dioxide from being generated, but the blower box 107 by downsizing the hot air heater is provided. Problems such as overheating of the side surface, overheating of the side surface of the exterior body of the device main body 101, and concentrated hot air blowing from the hot air outlet 102 have not been solved.

Accordingly, in order to solve the above problems, the present invention provides a burner unit that mixes vaporized fuel and air and burns the mixture with an upper burner head, and a burner head of the burner unit includes: Combustion cylinder substrate having a burner portion attached so as to protrude to the upper surface, a cylindrical combustion cylinder provided on the upper surface of the combustion cylinder substrate so as to cover the burner head protruding to the upper surface, and burning so as to cover the combustion cylinder A blower box cover part attached to the tube substrate, and a blower box having a blower outflow part opened in the front and a blower inflow part opened in the rear is built in the main body of the warm air heater. In a warm air heater that mixes air blown from a convection fan provided on the back surface and combustion gas from a combustion cylinder and blows it out as hot air, the hot air flows through a gap between the side surface of the blower box and the combustion cylinder Heater body side Only set baffles on the side adjacent to the plate, to form a cutout portion that is substantially upper front and baffle lower partially cut away of the combustion liner to the opposite side of the combustion cylinder, the combustion cylinder A lid-like portion that covers a part of the upper opening, and a raised portion that is obliquely raised from the end of the lid-like portion toward the rear of the combustion cylinder. On the opposite side, a lid portion provided with a protruding portion that is higher than the baffle plate side is provided in the opening portion above the combustion cylinder .

Further, in the hot air heater according to claim 2, in particular, the configuration is such that a plate-like rectifying plate is provided at a position in front of the notch portion of the combustion cylinder on the front side of the combustion cylinder substrate according to claim 1. It is provided .

  According to claim 1 of the present invention, the baffle plate is provided on the side adjacent to the side plate of the main body of the hot air heater in the gap between the side surface portion of the blower box and the combustion cylinder, so that the convection fan behind the blower box. The side where the baffle plate is provided is less likely to pass from the opposite side, so that the high temperature combustion gas blown out from the combustion cylinder becomes negative pressure on the side where the baffle plate is provided is pulled to the side where the baffle plate is provided, While being able to prevent the side part of the air blower box on the opposite side from being overheated, the warm air blown out from the front of the air blower box is widened, and hot hot air can be prevented from being concentrated and blown out.

  Furthermore, a part of the combustion cylinder is cut out on the opposite side of the baffle plate substantially above the front side of the combustion cylinder to form a cut-out portion that is low, so that most of the high-temperature combustion gas is open above the combustion cylinder. It flows toward the notch before blowing out from, and blows out from the notch to the side of the combustion cylinder, so that most of the high-temperature combustion gas is pulled to the side where the baffle plate is provided, and the side of the blower box on the opposite side While being able to prevent a part from being overheated, the warm air which blows off from the front of a ventilation box becomes wide, and it can prevent that a hot air of high temperature concentrates and blows off.

And a lid-like portion that covers a part of the opening portion above the combustion cylinder , and a round-up portion that is obliquely raised from the end of the lid-like portion toward the rear of the combustion cylinder. On the opposite side of the baffle plate, a lid portion provided with a protruding portion higher than that on the baffle plate side is provided at the upper opening portion of the combustion cylinder, so that a lid shape is formed rather than simply providing a notch in the combustion cylinder. Since the combustion gas is blown out to the opening portion above the combustion cylinder by the portion, more of the combustion gas is guided to the notch by the raised portion provided with the protrusion, so that more of the high-temperature combustion gas Is pulled to the side where the baffle plate is provided, and the side part of the air blower box on the opposite side can be further prevented from being overheated, and the warm air blown from the front of the air blower box becomes wider and the hot air is concentrated. Can be prevented from blowing out.

  According to a second aspect of the present invention, there is provided a warm air heater according to the first aspect, wherein the plate-like rectifying plate is provided at a position in front of the notch portion of the combustion cylinder on the front side of the combustion cylinder substrate. By providing it, the combustion gas blown out from the notch to the side of the combustion cylinder is blown out to the side of the blower box on the notch part side, and the combustion gas is guided to the baffle plate side. The air flow from the convection fan that flows from the back to the front flows smoothly between the side surface of the blower box on the notch portion side and the combustion cylinder, so that the side surface portion of the air blow box on the notch portion side While not overheating, the side of the outer body of the hot air heater body that is approaching the blower box on the notch side can be prevented from being overheated, and the warm air blown out from the front of the blower box becomes wider and the temperature is high. The hot air of the It is those that can be prevented.

Next, an embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a hot air heater body, 2 an operation unit provided at the upper part of the front surface, 3 a hot air outlet to which a louver 4 for guiding the hot air is attached, and 5 a fan guard 7 to the hot air intake 6 on the back surface. A convection fan attached via the airflow, 8 is a blower box for communicating the hot air intake 6 and the hot air blower 3, 9 is a burner part provided with a burner head 10 protruding from the blower box 8, 11 Is a combustion cylinder that surrounds the burner head 10 to form a combustion space, and 12 is a heat shield disposed in the blower box 8 directly above the combustion cylinder 11, and the burner portion 9 and the combustion cylinder 11 is attached to the combustion cylinder substrate 13, and the combustion cylinder substrate 13 to which the burner portion 9 and the combustion cylinder 11 are attached is attached to the blower box 8.

  The exterior body of the apparatus main body 1 is configured by fixing a front panel 14 covering the front surface, an upper surface plate 15 covering the upper surface, and a rear surface plate 16 covering the side surfaces and the rear surface on a mounting table 17.

  Next, 18 is a cartridge-type tank for supplying liquid fuel such as kerosene, 19 is a fixed tank for temporarily storing fuel from the cartridge-type tank 18, and 20 is a burner for supplying fuel in the fixed tank 19 through an oil feed pipe 21. An electromagnetic pump 22 for pressure-feeding to the unit 9 is a combustion fan that blows combustion air through a blower pipe 23.

Next, the structure of the blower box 8 will be described.
The blower box 8 has a U-shaped cross section composed of left and right side portions 24 and 25 and a top plate portion 26 on a combustion tube substrate 13 to which the burner portion 9 and the combustion tube 11 are attached. The front and back of the blower box 8 are opened. The blower inflow section 28 into which the blown air from the hot air intake 6 flows in the back, and the warm air flows out to the warm air outlet 3 in the front. A blower outflow portion 29 is formed.

  Further, a notch 30 is formed on the left side of the front of the combustion cylinder 11 by cutting away a part of the combustion cylinder 11. The notch 30 is formed in the notch 30 about the combustion gas outlet 31 above the combustion cylinder 11. A lid portion 32 that closes the half is attached.

  The lid portion 32 includes a lid-like portion 33 that completely covers about one third of the front of the combustion cylinder 11, and a round-up portion that is obliquely raised from the end of the lid-like portion 33 toward the rear of the combustion cylinder 11. 34. The raised portion 34 forms a protruding portion 35 that is approximately half on the left side of the front surface.

  Further, on the combustion cylinder substrate 13, a plate-like rectifying plate 36 is provided at a position approximately in the middle between the center of the combustion cylinder 11 and the left side surface 24 of the front surface of the blower box cover portion 27 before the front of the combustion cylinder 11. 8 is provided in the direction from the blast inflow portion 28 to the blast outflow portion 29.

  Further, when the combustion cylinder substrate 13 with the burner unit 9 and the combustion cylinder 11 attached thereto is attached to the side surface part 25 on the front right side of the blower box cover part 27, the opening part on the right rear side as viewed from the front of the combustion cylinder 11 is attached. A baffle plate 37 is provided so as to block a part, and the baffle plate 37 is provided obliquely so as to approach the left rear portion of the combustion cylinder 11 as it goes upward so as not to contact the combustion cylinder 11. The width becomes shorter as it goes upward, and it has a substantially right triangle shape.

Next, the combustion state during heating operation will be described.
The fuel pressure-fed from the electromagnetic pump 20 in the burner unit 9 is vaporized, and the combustion air from the combustion fan 22 is mixed with the vaporized gas to form an air-fuel mixture. The air-fuel mixture is blown out from the burner head 10 and blown out. By igniting the air-fuel mixture, flame is generated in the burner head 10 and the air-fuel mixture burns.

  The combustion gas flows upward from the combustion cylinder 11, but before most of the combustion gas blows out above the combustion cylinder 11, the combustion gas flows from the lower portion on the right side of the raised portion 34 of the lid portion 32 toward the notch 30. The gas is blown out from the notch 30 in the horizontal direction of the combustion cylinder 11.

  The baffle plate 37 provided so as to block a part of the opening portion on the right rear side when viewed from the front of the combustion cylinder 11 causes the blast fan 8 to blow air from the convection fan 5 flowing from the back of the blow box 8 toward the front. Since the right side when viewed from the front is less than the left side, the right side when viewed from the front is negative pressure from the left side, and the combustion gas blown out from the notch 30 in the lateral direction of the combustion cylinder 11 is viewed from the front of the blowing box 8. Thus, the side surface 24 on the front left side of the blower box cover 27 is not overheated by the combustion gas blown from the notch 30 in the lateral direction of the combustion cylinder 11, and the blower box. 8 The warm air blown out from the front is wide and can prevent the hot air from concentrating near the center.

  Further, a notch is formed by a plate-like rectifying plate 36 provided at a substantially intermediate position between the center of the combustion tube 11 and the left side surface portion 24 of the blower box cover portion 27 in front of the front surface of the combustion tube 11 on the combustion tube substrate 13. The combustion gas blown out from the portion 30 in the lateral direction of the combustion cylinder 11 is restricted from flowing to the left side when viewed from the front of the blower box 8, and more combustion gas is supplied to the right side of the rectifying plate 36, that is, the right side as viewed from the front of the blower box 8. In addition to guiding, the air flow from the convection fan 5 that flows from the back of the air blowing box 8 toward the front flows smoothly between the left side surface portion 24 of the air blowing box cover portion 27 and the combustion cylinder 11, thereby The side part 24 on the front left side of the blower box cover part 27 is not overheated, and the side face of the exterior body of the hot air heater body 1 can be prevented from being overheated.

1 is a schematic perspective view of an embodiment of the present invention. The schematic sectional drawing of the same warm air heater. The front view in the state which removed the front panel. The perspective view of the ventilation box. The rear view of the ventilation box. The perspective view of the combustion cylinder board | substrate of the state which attached the combustion cylinder. The top view of the combustion cylinder board | substrate of the state which attached the combustion cylinder. The schematic sectional drawing of the conventional warm air heater.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot air heater main body 5 Convection fan 8 Blower box 9 Burner part 10 Burner head 11 Combustion cylinder 13 Combustion cylinder board | substrates 24 and 25 Side surface part 27 Blower box cover part 28 Blower inflow part 29 Blast outflow part 30 Notch part 37 Baffle plate

Claims (2)

A burner part that mixes vaporized fuel and air and burns the mixture with an upper burner head, a combustion cylinder substrate with a burner part attached so that the burner head of the burner part protrudes on the upper surface, and an upper surface A combustion cylinder provided on the upper surface of the combustion cylinder substrate so as to cover the burner head protruding to the inside, and a blower box cover portion attached to the combustion cylinder substrate so as to cover the combustion cylinder. A blower box with an outflow part opened and a blower inflow part opened on the back is built in the hot air heater body, and the blown air from the convection fan provided on the back of the blower box and the combustion gas from the combustion cylinder in warm air heater for blowing mixed as hot air and set the baffle plate on the side adjacent to the side surface plate of the warm air heater body at a gap between the combustion cylinder and the side surface portion of the air blowing box, Near the front of the combustion cylinder To form a notch on the opposite side of the baffle plate is lower by notching a part of the combustion liner, and a lid-shaped portion which closes the part of the opening portion of the combustion cylinder upper end of the lid-shaped portion Combusting a lid provided with a raised portion that is inclined upward from the baffle to the rear of the combustion cylinder, and provided with a protruding portion higher than the baffle plate on the opposite side of the baffle plate A hot air heater characterized by being provided in an opening portion above a cylinder. The warm air heater according to claim 1, wherein a plate-like rectifying plate is provided at a position in front of the notch portion of the combustion cylinder on the front side of the combustion cylinder substrate.

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