JPS622457Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field The present invention relates to a hot air heater that blows out hot air using a convection fan.

BACKGROUND TECHNOLOGY Generally, in a hot air heater, combustion gas generated in a combustion tube inside a case body is introduced into a heat exchanger connected to the upper part of the combustion tube, and in this heat exchanger, a heat exchanger is installed at the back of the case body. Heat is exchanged with the air blown from the convection fan, and the heat-exchanged hot air is discharged from the hot air outlet on the front surface of the case body.
In this case, if the air from the convection fan is mainly directed towards the heat exchanger, the combustion cylinder, which is at the highest temperature, will become red hot, shortening the life of the appliance, and causing unevenness in the temperature of the hot air. If this is applied mainly to the combustion cylinder, which has the highest temperature, the heat exchanger will not receive enough air, resulting in poor thermal efficiency or only the top surface temperature of the case body becoming high.

For this reason, as shown in Japanese Utility Model Application No. 51-18453, a convection fan is provided for the heat exchanger, and an air distribution plate is vertically arranged between the combustion cylinder and the convection fan. A part of the air from the convection fan is guided directly to the heat exchanger, and another part of the air is guided to the lower part of the combustion tube by the air distribution plate, and the air is sent to the heat exchanger and the combustion tube. A diversion method has been proposed. By doing so, the heat exchange efficiency can be increased and the combustion cylinder can be cooled.

However, in what is shown in the above publication,
Note that there is a difficulty in cooling the upper part of the combustion tube. That is, the upper end of the air distribution plate extends to near the center of the convection fan, and the lower end is located near the bottom of the combustion tube, and in addition, in the illustration in the above publication, the connection between the combustion tube and the air distribution plate is Because the exhaust pipe is located in between, the air from the convection fan reaches the heat exchanger and the lower part of the combustion tube, but the air is not sent to the upper part of the combustion tube, and this area is not cooled. Not enough is done.

Problems that the invention aims to solve As mentioned above, in conventional warm air heaters that are equipped with an air distribution plate to divide the air from the convection fan into two, there are still difficulties in cooling the upper part of the combustion tube. There is.

The present invention is an attempt to improve the above-mentioned points, and aims to uniformly blow air from a convection fan to the entire heat exchanger and combustion cylinder.

[Structure of the idea]

Means for Solving the Problems The present invention introduces combustion gas generated in a combustion tube inside the case body into a heat exchanger that communicates with the upper part of the combustion tube, and in this heat exchanger, a In a hot air heater that exchanges heat with air blown from a convection fan and discharges the heat exchanged hot air from a hot air outlet on the front side of the case body, the convection fan is placed facing the back side of the combustion tube. A ventilation distribution plate is disposed vertically between the combustion tube and the convection fan above the center of the convection fan, and an air distribution plate is provided at the top of the ventilation distribution plate that is inclined toward the heat exchanger side. In addition, a lower guide plate part is formed at the lower part of the air distribution plate and is inclined toward the convection fan side.

Function The present invention guides a part of the air from the convection fan to the upper heat exchanger by the air distribution plate and the upper guide plate, and guides the other part of the air to the lower guide plate. The air is guided to the upper part of the combustion tube and the lower part of the heat exchanger, and the other part of the air is sent along the body of the combustion tube, improving heat exchange efficiency and reducing the red heat of the combustion tube. It is intended to prevent

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 indicates a warm air heater, in which an intake chamber 3 having an intake port 4 is provided on one side of a case body 2, and an electric motor 5 and a supply air rotated by the electric motor 5 are provided in the intake chamber 3. A fan 6 is provided. In addition, a burner chamber 8 is connected to the intake chamber 3 via an air supply path 7.
A pot-shaped burner 9 is disposed in the burner chamber 8, and a vent hole 10 for supplying combustion air from the burner chamber 8 is formed around the upper part of the burner 9. A vaporization ring 18 and a combustion ring 19 are provided with an ignition heater 17 facing them.

Further, a cartridge-shaped fuel tank 11 that stores fuel such as petroleum is provided on the other side of the case body 2.
and a fuel receiving tray 12 that removably supports the fuel tank 11 and communicates with the fuel tank 11 via a quantitative supply mechanism that keeps the level of the fuel supplied from the fuel tank 11 constant at all times. and a fuel amount regulator 14 connected to this fuel tray 12 via a conduit 13.
4 is connected to the lower part of the burner 9 via a conduit 20. Then, the fuel such as oil supplied to the burner 9 is vaporized by ignition, and
The combustion air is mixed with the combustion air supplied from the air, resulting in mixed combustion.

A combustion tube 16 constituting a combustion chamber 15 is provided in the upper part of the burner 9, and a heat exchanger 2 is connected to the upper part of the combustion tube 16 via a baffle plate 21 and a connection tube 22.
3 are communicated with each other to form a connecting passage 22a through which combustion gas flows from the combustion tube 16 to the heat exchanger 23. Further, the heat exchanger 23 is extended into a space inside the case body 2 on one side, and an exhaust pipe 24 is connected to the lower part of this extended part. The exhaust chamber 26 communicates with an exhaust chamber 26 provided with a rotating exhaust fan 25, and the exhaust chamber 26 is provided with an exhaust port 27 that communicates with an exhaust pipe led outdoors.

A fitting opening 2 is provided on the upper wall of the heat exchanger 23 above the combustion tube 16 and facing above the connection tube 22.
8 is opened, and a heat collecting tube 29 is connected to the connecting passage 22a in the connecting tube 22 so as to face below the fitting opening 28.
The heat collecting tube 29 has an upper end opening narrowed to form a heat collecting port 29a.

30 is an evaporator, and this evaporator 30 is an evaporator dish 3.
1, and an evaporating dish cover 32 which is fitted onto the upper surface of the evaporating dish 31 and has a flange-shaped peripheral edge connected to the flange-shaped periphery of the evaporating dish 31. The heat collecting cylinder 29 is supported by a packing 33 through a packing 33, and a bottom portion bulging downward is fitted into the fitting opening 28 and exposed above the heat collecting port 29a of the heat collecting cylinder 29. In addition, the evaporating dish 31
The flange-like peripheral edges of the evaporating plate cover 32 and the evaporating dish cover 32 are fastened to the upper wall of the heat exchanger 23 by bolts 34 and nuts 35 with springs interposed therebetween. Further, an air intake port 36 for introducing the air sent into the case body 2 into the evaporator 30 is opened in one side peripheral wall of the evaporating dish cover 32, and a water droplet receiving gutter 37 flows outward from the air intake port 36. is led out, and a water droplet reservoir 38 is formed at the tip of this water droplet receiving gutter 37.

One end of a water conduit 40 is connected to the side wall of the evaporating dish 31, and the other end of the water conduit 40 is led out to the outside of the back side of the case body 2 and is attached to a water receiving tray attached to the back side of the case body 2. A drain pipe 39 led out from the water droplet reservoir 38 is connected to the upper part of the water tray 41, and a cartridge-shaped water tank 4 is connected to the upper opening of the water tray 41.
2 are removably fitted together, and the water tray 41 and water tank 42 are connected via a constant supply mechanism that keeps the water level in the water tray 41 constant at all times. Further, the water level of the evaporating tray 31 is configured to be equal to the water level of the water receiving tray 41.

A blow-off hole 4 is provided at the upper opening edge of the evaporating dish cover 32.
The lower end of the steam duct 47 with the opening 6 opened is connected via the packing 48, and the upper end of this steam duct 47 is opened facing the opening 49 on the upper surface of the case body 2, and the upper end of the steam duct 47 is A blow-off port body 50 is detachably supported via a packing 51, and a steam blow-off port 52 is opened in the blow-off port body 50 for blowing out the steam introduced by the steam duct 47 into the room.

43 is a convection fan, and this convection fan 43 has an air intake port 44 opened in the back plate of the case body 2.
It is arranged so as to face the back side of the combustion tube 16 and the height of the center is located slightly above the center of the combustion chamber 15, and the intake side is covered with a guard 45 made of a perforated plate. ing. Further, between the air supply side of the convection fan 43 and the combustion tube 16, an air distribution plate 53 is vertically supported by a support piece 16a protruding from the outer surface of the combustion tube 16.
The upper end of this air distribution plate 53 is located approximately in the middle of the height of the heat exchanger 23, and the lower end is slightly above the height of the center of the convection fan 43. Further, an upper guide plate portion 53a that is inclined toward the heat exchanger 23 is formed at the upper part of the air distribution plate 53, and a convection fan 4 is formed at the lower part of the air distribution plate 53.
A lower guide plate portion 53b is formed which is inclined toward the third side.

A hot air outlet 54 is formed on the front surface of the case body 2.

Next, the operation will be explained.

Fuel, which has been replaced with air from the fuel tank 11 and is supplied to the combustion tray 12 while maintaining a predetermined liquid level, is supplied to the burner 9 via the fuel amount regulator 14. At the same time, air sucked from the intake port 4 by the air intake fan 6 is supplied to the burner 9, mixed with fuel vaporized by ignition, and combusted in the combustion chamber 15. The high-temperature combustion gas generated by this combustion is introduced into the heat exchanger 23, passes through the heat exchanger 23, is heat exchanged, and is heated by the exhaust fan 2.
5 and is discharged from the exhaust port 27.

On the other hand, the air sucked into the case body 2 by the convection fan 43 is blown out in the axial direction of the convection fan 43 within the case body 2, and a part of the air is blown out from the air distribution plate 5.
3, and is guided by the upper guide plate part 53a to the upper part of the heat exchanger 23 diagonally upward, and the other part of the air flows from the lower guide plate part 53b to the upper part of the combustion tube 16. and the air distribution plate 53, and is guided by the upper guide plate portion 53a to the combustion tube 1.
6 and the lower part of the heat exchanger 23, and another part of the air is blown along the middle and lower part of the height of the combustion tube 16. In this way, the air is blown in the upper and lower directions of the heat exchanger 23 and the upper and lower parts of the combustion tube 16 to exchange heat, and the body of the combustion tube 16 is further cooled to prevent red heat, and the blown air becomes warm air. The hot air is blown into the room from the hot air outlet 54.

The combustion gas from the combustion chamber 15 is then transferred to the combustion chamber 1.
All of the heat is collected by the heat collection port 29a of the heat collection cylinder 29 provided in the connection cylinder 22 of the heat exchanger 23 directly above the heat exchanger 23, and the evaporation that is fitted above this and exposed inside the heat exchanger 23 The bottom of the vessel 30 is heated intensively. Due to this heating, the water that is constantly supplied from the water tank 42 in the evaporating dish 31 at a constant water level boils and evaporates. On the other hand, a part of the air blown into the case body 2 by the convection fan 43 is guided by the air distribution plate 53 and is passed through the air intake port 36 to the evaporator 3.
The air is supplied into the interior of the room, and is blown out into the room through the outlet body 50, humidifying the room.

[Effect of idea]

According to the present invention, a part of the air from the convection fan is guided to the upper heat exchanger along the guide plate section above the outer surface of the air distribution plate, and the other part of the air is guided to the lower part of the air distribution plate. The air is guided to the upper part of the combustion tube and the lower part of the heat exchanger by the plate part, and the other part of the air is sent along the circumferential surface of the central part of the combustion tube.
Air is blown uniformly throughout the heat exchanger and combustion tube, improving heat exchange efficiency, reliably preventing red heat in the combustion tube, and extending the life of the appliance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a warm air heater showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional side view of the same. 1... Warm air heater, 2... Case body, 16...
Combustion cylinder, 23... Heat exchanger, 43... Convection fan, 53... Air distribution plate, 53a, 53b... Guide plate portion, 54... Warm air outlet.

Claims (1)

[Claim for Utility Model Registration] Combustion gas generated in a combustion tube inside the case body is introduced into a heat exchanger connected to the upper part of the combustion tube, and in this heat exchanger, from a convection fan provided at the back of the case body. In the hot air heater that exchanges heat with the air blown from the air and discharges the heat exchanged hot air from the hot air outlet on the front side of the case body, the convection fan is disposed facing the back side of the combustion tube, An air distribution plate is disposed vertically between the combustion tube and the convection fan above the center of the convection fan, and an upper guide sloped toward the heat exchanger is provided on the upper part of the air distribution plate. What is claimed is: 1. A warm air heater comprising: a plate portion; and a lower guide plate portion inclined toward the convection fan at a lower portion of the air distribution plate.