JP2003336908A - Louver structure for warm air heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warm air structure in such a way that an internal mechanism is invisible from the warm air outlet of a frame and that warm air blown out of a warm air outlet reaches far. <P>SOLUTION: An air feeding path 2 for communicating a rear part with a front part of a frame 1 is provided, an indoor convection fan 3 is installed on the rear side of the frame 1, and a warm air outlet 4 is provided on the front side of the frame 1. Indoor air blown to the air feeding path 2 with the indoor convection fan 3, is heated at a heat discharge part 6 of a burner 5 arranged in the air feeding path 2, and is blown out into a room from the hot air outlet 4. The warm air outlet 4 is provided with a plurality of louvers 7 set horizontally along the lower side of the air feeding path 2, an air flow control part 7a arranged almost horizontally or arranged with the rear edge lowered toward the rear part of the louvers 7 is provided, and an inside covering part 7b having a front edge at a location lower than the rear edge of the air flow control part 7a is provided at the front part of the louvers 7, to change an air flow towards floor from the air feeding path 2 into an air flow towards the front of the frame 1, and at the same time, to make the burner 5 or the heat discharge part 6 invisible by the inside covering part 7b. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air structure in which the inner mechanism is not visible from the warm air outlet of a frame and the warm air blown from the warm air outlet reaches a long distance. .

[0002]

2. Description of the Related Art In a frame of a warm air heater, an air passage is provided which connects a back portion and a front portion to each other, and a convection fan for blowing indoor air is attached to the back portion of the frame which is an inlet of the air passage. Further, a warm air outlet is provided on the front surface of the frame to blow out the air sent to the air passage. Since the heat radiating portion of the burner installed in the frame is arranged in the air blowing passage, the air blown into the air blowing passage by the convection fan exchanges heat with the heat radiating portion, and the high temperature combustion blown out from the heat radiating portion. It becomes hot when mixed with gas, and is blown from the hot air outlet to heat it.

As described above, when the room is heated by the high-temperature hot air blown out from the hot air outlet, when the warm air outlet is in front of the air passage and the flow of the hot air blows out in the horizontal direction, Since the hot air tends to rise, the warm air does not reach a long distance and forms a gentle curve toward the ceiling, causing a large variation in the indoor temperature distribution. Also, if the warm air outlet is located at the bottom of the air duct to narrow the opening width and the warm air blows out strongly toward the floor, the position where the warm air draws a gentle curve toward the ceiling will be improved. Although it can be separated from the heater, the floor surface in front of the heater is heated by hot air to a dangerous temperature, and blowing hot air onto the floor is a problem.

Therefore, a louver capable of changing the flow of warm air is attached to the hot air outlet so that strong warm air blows forward along the floor surface to reach far away, so that the temperature distribution in the room becomes uniform. I have to. However, the louver has great resistance to the flow of air, and the indoor convection fan that creates strong warm air must be upsized in order to create an air flow that overcomes this resistance. There is a need for Generally, increasing the size of the indoor convection fan increases cost, so it is supported by high speed rotation, but when the number of rotations of the blower is increased, the rotation noise increases,
It is necessary to devise to reduce noise.

[0005]

In order to make the temperature distribution in the room uniform, it is necessary to allow warm air to reach far from the heater. For this purpose, the opening of the hot air outlet, which is the outlet of the air passage, is required. The area must be narrowed to create a strong warm air flow, and the louver must control this strong warm air flow. However, since this louver is an obstacle to the flow of air, if the warm air can reach far even if the number of louvers is reduced, the resistance of the air flow by the louvers will decrease, and the indoor convection fan will decrease. Can reduce the noise.

The present invention proposes a louver structure that allows warm air to reach a long distance even if the number of louvers used is small, and also proposes an optimum air passage structure suitable for using this louver. is there. Further, when a large number of louvers are arranged, it is difficult to see the burner 5 and the heat radiating portion in the air blow passage from the front of the heater, but if the number of louvers is reduced, the inside becomes completely visible, and some countermeasure is required.

[0007]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and in the frame body 1, there is provided an air passage 2 for communicating the back part of the frame body 1 with the front part of the frame body 1, An indoor convection fan 3 is attached to the rear side of the frame 1 of the air passage 2, and a warm air outlet 4 is attached to the front side of the frame 1 of the air blowing passage 2, and a heat radiating portion of a burner 5 is installed in the air blowing passage 2. In the warm air heater in which the indoor air blown into the air passage 2 by the convection fan 3 has a high temperature and is blown out into the room from the hot air outlet 4, the hot air outlet 4 has a lower portion of the air passage 2. A plurality of louvers 7 are provided side by side, and the rear part of the louver 7 is provided with an air flow control part 7a arranged substantially horizontally or so that the trailing edge is lowered, and the front part of the louver 7 is provided. The air flow controller 7
a inner cover 7b having a front edge at a position lower than the rear green of a
Is provided.

Of the louvers 7 provided side by side at the hot air outlet 4, the lowermost louver 7 is formed only by the air flow control section 7a which is arranged substantially horizontally or whose rear edge is lowered. The whole is designed to function as the air flow control unit 7a.

Further, the top plate 2 on the front side of the frame body 1 of the air passage 2
a is formed so as to be inclined downward, and an air flow that flows downward toward the warm air outlet 4 located at the lower part of the air passage 2 is guided to an air flow control unit 7 a provided at the rear portion of the louver 7 to guide the frame. Since it is directed toward the front of the body 1, the warm air flow by the indoor convection fan 3 is directed toward the warm air outlet 4 without causing strong turbulence even if the burner 5 and the heat radiating portion 6 are present. The air flow control unit 7a of No. 7 operates efficiently.

Further, an air shield plate 8 for blocking the air flow directly toward the hot air outlet 4 is arranged in the air passage 2 on the front surface of the indoor convection fan 3 attached to the rear surface of the frame body 1. Since the airflow toward the back surface of the inner cover portion 7b is suppressed, the warm air of the indoor convection fan 3 is prevented from being generated by the inner cover portion 7b in the reverse direction toward the floor surface.

[0011]

The air sent to the air blowing passage 2 by the indoor convection fan 3 becomes high temperature by the heat of the burner 5 and the heat radiating portion 6, and this hot air is narrowed by the hot air outlet 4 located in the lower portion of the air blowing passage 2. As a result, the warm air velocity is increased, and the warm air flows toward the floor according to the shape of the air passage 2. If a plurality of louvers 7 are attached to the warm air outlet 4 as in the prior art and a plurality of louvers 7 are attached to widen the gap, the flow rate of air from the gap of the louvers 7 to the floor surface increases. Conventionally, this louver 7
Since the number of louvers 7 is reduced and the amount of air passing through is large, the control becomes difficult because the flow direction is changed by adapting to the above.

In the louver 7 of the present invention, since the air flow control portion 7a which is arranged substantially horizontally or whose rear edge is lowered is provided at the rear portion of the louver 7, it hits the air control portion 7a and is directed horizontally or upward. The air flow acts to push up the air that tries to pass through the gap of the louver 7 from the lower side to the upper side, and the air flow from the air passage 2 to the floor surface is changed to the air flow toward the front of the heater, and a strong flow. It came to reach far away.

An inner cover portion 7b having a front edge at a position lower than a rear edge of the air flow control portion 7a is provided on the front portion of the louver 7.
This inner cover portion 7b is located in the shadow of the air control portion 7a where the air flow toward the floor is obstructed, and the gap of the louver 7 whose flow direction is changed by the lower air flow control portion 7a. The airflow flowing through the air conditioner is guided forward, and when the inside of the air passage 2 is viewed from the front of the heater, the burner 5 and the heat radiating portion 6 cannot be directly viewed by the inner cover portion 7b.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment of a heater using petroleum fuel shown in the drawings. 1 is a frame of the heater, 2 is a penetrating inside of the frame 1 from the back to the front of the frame 1. Formed by the above, 3 is an indoor convection fan provided at the inlet of the air passage 2 on the back side of the frame 1, and 4 is the air passage 4 on the front side of the frame 1.
It is a hot air blowout □ formed at the exit of.

Reference numeral 5 is a burner provided in the frame 1, 9 is a combustion chamber arranged above the burner 5, 10 is a fuel pump for supplying fuel to the burner 5, and 11 is combustion for supplying combustion air to the burner 5. A fan, 12 is an ignition heater that functions as a preheat heater that heats the inside of the burner 5 to enable combustion, and energizes the ignition heater 12 in advance to raise the temperature of the burner 5 to a high temperature. When activated, the fuel sent to the burner 5 is vaporized and ignited by the heat of the ignition heater 12, and combustion is started by the air sent by the combustion fan 11. The combustion flame and combustion gas generated in the burner 5 are sent to the combustion chamber 9 and are completely combusted.

Reference numeral 6 denotes a heat radiating portion constituted by the upper portion of the burner 5 located in the air passage 2 and the combustion chamber 9, and the indoor air blown into the air passage 2 by the indoor convection fan 3 is burner 5 or combustion. The hot air is heated by a heat exchange unit (not shown) arranged subsequent to the chamber 9 and the combustion chamber 9, and becomes high-temperature hot air, which is blown into the room from the hot air outlet 4.

The oil heater of the embodiment is of a type called a fan heater that discharges combustion exhaust gas into the room, and a part of the burner 2 and the combustion chamber 9 are arranged in the air passage 2.
The indoor convection fan 3 mixes the indoor air sent into the air passage 2 and the combustion exhaust gas discharged from the combustion chamber 9 following the burner 5 inside the air passage 2, and the warm air outlet on the front surface of the frame 1 is mixed. It becomes hot air from 4 and blows out

The warm air outlet 6 is formed in the front of the air passage 2 at a position slightly lower than the center of the front of the frame 1.
Reference numeral 7 is a louver that is horizontally long over the entire width of the hot air outlet 6, and the air sent by the indoor convection fan 5 is heated by heat radiation from the combustion chamber 3, and the combustion exhaust gas and the combustion air are further mixed. The louver 7 blows the hot air from the narrowed hot air outlet 6 so that the hot air can reach far in front of the heater.

In the warm air heater, when the flow velocity of the warm air blown out from the warm air outlet 4 is slow, the warmed air having a high temperature is likely to rise, so that the flow of the warm air is likely to flow upward and the warm air is The temperature distribution in the room tends to fluctuate without reaching a long distance. For this reason, the warm air is blown out at a strong flow velocity from a position as low as possible as in the above configuration, but when the hot air outlet 4 is located at a low position in the air passage 2, the strong warm air is blown to the floor surface. Although it sprays and reaches a long distance, the floor in front of the heater is heated and becomes very dangerous.

In order to avoid this state, a louver 7 is attached to the conventional hot air outlet 4 so that the warm air is directed forward without blowing on the floor surface. In order to change the flow of warm air, a large number of louvers 7 must be attached at a fine pitch. This louver 7 becomes a great resistance to the flow of warm air, and the indoor convection fan 3 becomes large in size and high in rotation to obtain a flow velocity. I need a mold.

Recently, there has been a tendency toward downsizing and cost reduction of a heater, and in order to stop the use of such an indoor convection fan 3, it is necessary to reduce the number of louvers 7 which are flow path resistances. However, if the pitch of the louvers 7 is roughened, there arises a problem that the hot air flowing toward the floor surface passes through the gaps of the louvers 7 and heats the floor surface.

The present invention makes it possible to effectively change the blowing direction of the warm air with a small number of louvers 7. Reference numeral 7a is an air flow control portion provided at the rear of the louver 7 on the side of the air passage 2. The air flow control unit 7a is inclined substantially horizontally or so that the trailing edge is lowered. Reference numeral 7b denotes a front portion of the louver 7, which is an inner cover portion that is continuous in front of the air flow control unit 7a. The inner cover portion 7b is an air flow control unit 7b.
It is inclined to have a front edge at a position lower than the rear edge of a.

In the louver 7 of the present invention, a part of the warm air that blows out from the blower passage 2 in a diagonally downward direction hits the air flow control section 7a to change the direction of the air horizontally or diagonally upward, while the louver 7 In contrast to the warm air that tries to pass straight through the gap toward the floor, the warm air whose direction has been changed pushes upward from the lower side and acts to change the direction of the warm air upward. From the above, the air flow toward the floor surface via the warm air outlet 4 was changed to the air flow toward the front of the heater, and the strong air flow reached far away without heating the floor surface.

At this time, the inner cover portion 7b provided on the front portion of the louver 7 is guided to the back by attaching warm air flowing through the gap of the louver 7 whose flow direction is changed by the lower air flow control portion 7a. Depending on the inclination angle of the inner cover portion 7b, the curved state, and the flow velocity of warm air, the inner cover portion 7b has a function of
Warm air is drawn in from the front edge of b toward the upper surface, and the warm air easily flows toward the front of the heater.

On the other hand, when the mounting pitch of the louvers 7 becomes rough, the inside of the air passage 2 becomes completely visible through the gaps between the louvers 7. However, if this inner cover portion 7b is at the front of the louvers 7, the air is blown from the front of the heater. When the inside of the passage 2 is viewed, the burner 5 and the heat radiating portion 6 cannot be directly viewed due to the inner cover portion 7b.

As described above, the louver 7 of the present invention includes the air flow control section 7a of the lower louver 7 and the upper louver 7.
Since the inner cover portion 7b has a function of changing the flow of warm air, the performance of the lowermost louver 7 is hardly changed even if the inner cover portion 7b is eliminated, and the lowermost louver 7 is a flat plate-shaped louver. If carried out in 7, there is an effect of cost reduction.

As described above, the present invention utilizes the fact that the warm air is blown obliquely downward due to the positional relationship between the air blowing passage 2 and the warm air outlet 4, so that the flow of such warm air is positively applied. Even more excellent effects can be obtained by using the shape of the air passage 2 that is formed as described above. That is, 2a is a top plate of the air passage 4 on the front side of the frame 1, and the top plate 2a is inclined downward so as to guide the warm air flowing through the air passage 2 to the hot air outlet 4.

As a result, from the indoor convection fan 3 to the air duct 2
The air sent to the warm air outlet 4 obliquely downward along the top plate 2a of the inclined air passage 2 without causing a turbulent flow, so when passing through the warm air outlet 4 with the louver 7. Is in a rectified state, the direction of the air flow changed by the air flow control unit 7a at the rear of the louver 7 is stable, and the blowing direction of the hot air passing through the gap of the louver 7 is surely changed. become able to.

On the other hand, since the inner cover portion 7b of the louver 7 is substantially inclined downward, when the hot air flows directly toward this inclined surface, the blowing direction of the hot air is directed toward the floor surface. There is a fear. Reference numeral 8 denotes an air shielding plate that is located in the air passage 2 between the indoor convection fan 3 and the warm air outlet 4 and that intercepts the air flow directly toward the warm air outlet 4, and the wind of the indoor convection fan 5 is directed to the air shielding plate 8. Instead of being disturbed and going directly to the hot air outlet 4, the air flows toward the hot air outlet 4 after passing above the air shield plate 8 and hits the air flow controller 7a of the louver 7. Therefore, the inner cover portion 7b of the louver 7 is shaded by the air flow control portion 7a, so that the direction of the air flow changed by the air flow control portion 7a at the rear portion of the louver 7 is stable and the blowing direction of the warm air is changed. You will be able to point to the front of the heater.

The embodiment shown in the drawing is a pot type oil combustor for burning petroleum fuel, but since the present invention relates to a louver attached to a hot air outlet continuous with an air passage, it is of a burner type. Is not a particular problem, and can be applied to a combustor that burns a gas fuel such as city gas or a petroleum fuel by heating in a vaporization chamber instead of gas to gasify and burn.

[0031]

Since the function of the louver 7 of the conventional hot air outlet 4 is to change the flow of air along the louver 7, when the distance between the louvers 7 is widened, the air blow passage 2 is provided.
There is a risk that the downward air flow generated by the shape of (1) will pass through the gap of the louver 7 and directly heat the floor surface in front of the heater. This invention has an air flow controller 7 at the rear of the louver 7.
a is provided to change the direction of the warm air flowing through the gap of the louver 7 on the inlet side, and further the warm air is adapted to the lower surface of the inner cover portion 7b following the air flow control portion 7a of the louver 7 adjacent to the upper side. And creates a flow towards the front of the heater,
The warm air does not reach the floor surface and goes to the front away from the heater, then draws a gentle curve toward the ceiling, so the hot air reaches far while preventing troubles due to heating of the floor surface, and the temperature distribution in the room Became uniform.

Further, when the gap between the louvers 7 is wide, the burner 5 and the like in the air duct 2 are directly visible from the front of the heater, which is a design problem, but the louver 7 of the present invention has a problem. Since the inner cover portion 7b is provided, the inside of the air passage 2 cannot be directly seen, and the heater having an excellent design can be obtained.

As described above, according to the present invention, the louver 7 is used.
Since the interval between the two can be widened, it does not obstruct the flow of the indoor convection fan 3, and the indoor convection fan 3 does not need to use a fan of high rotation type or a large diameter, and noise of the warm air heater can be reduced. In addition to being able to do so, it has become possible to use an inexpensive indoor convection fan 7.

Of the louvers 7 provided at the hot air outlet 4, the louver 7 at the lowermost stage has only the air flow control section 7a, so that it can be manufactured at a low cost and also has a function of producing an air flow to the front of the heater. It can be done reliably.

The top plate 2 of the air passage 2 on the front side of the frame body 1
Since a is inclined downward, the warm air flowing through the air passage 2 comes to the warm air outlet 4 without causing turbulence,
Since the hot air passing through the hot air outlet 4 with the louver 7 is in the rectified state, the direction of the air flow changed by the air flow control unit 7a at the rear of the louver 7 is also stable, and the temperature of the air flowing through the gap of the louver 7 is stable. It has become possible to change the blowing direction of warm air by acting on the wind.

Further, the air passage 2 in front of the indoor convection fan 3
In this case, since the air shield plate 8 is provided so that the wind of the indoor convection fan 3 does not directly go to the back surface of the inner cover portion 7b of the louver 7, the warm air hits the back surface of the inner cover portion 7b and causes the flow of the warm air downward. It won't change. Further, the air flow from the upper side of the air shield plate 8 toward the warm air outlet 4 becomes the air flow directed obliquely downward, so that the air flow control plate 7a of the louver 7 can always perform the expected function.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a warm air heater showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part of a warm air heater showing an embodiment of the present invention.

[Explanation of symbols]

1 frame 2 air duct 2a Top plate 3 Indoor convection fan 4 Hot air outlet 5 burners 6 Heat sink 7 louvers 7a Air flow controller 7b Internal cover 8 Air shield plate

Claims (4)

[Claims] 1. An air blow passage 2 is provided in the frame body 1 to connect the back portion of the frame body 1 to the front portion of the frame body 1, and an indoor convection fan 3 is provided on the back side of the frame body 1 of the air blow passage 2. , The frame 1 of the air duct 2
A warm air outlet 4 is attached to the front side of the fan, and a heat radiating portion 6 of a burner 5 is arranged in the air passage 2. The indoor air blown into the air passage 2 by the convection fan 3 becomes high temperature and the hot air blows. In the warm air heater that blows out indoors from the outlet 4, the warm air outlet 4 is located in the lower part of the air passage 2, and a plurality of louvers 7 are horizontally installed, and the rear portion of the louver 7 is substantially horizontal. Alternatively, the airflow control section 7a is arranged so that the trailing edge becomes lower, and the louver 7 is provided with an inner cover section 7b having a front edge at a position lower than the rear green of the airflow control section 7a. The louver structure of the warm air heater characterized by that. 2. Among a plurality of louvers 7 provided horizontally at the hot air outlet 4, the lowermost louver 7 is formed only by an air flow control section 7a which is arranged substantially horizontally or whose rear edge is lowered. The louver structure of the hot air heater according to claim 1. 3. A top plate 2a on the front side of the frame 1 of the blower duct 2 is formed to be inclined downward, and flows downward toward the warm air outlet 4 located at the lower part of the blower duct 2. The louver structure of the warm air heater according to claim 1 or 2, wherein the louver is directed to the front of the frame 1 by being guided by an air flow control unit 7a provided at a rear portion of the louver 7. 4. An air-shielding plate 8 which blocks an air flow directly toward the hot air outlet 4 is arranged in the air passage 2 on the front of the indoor convection fan 3 attached to the rear of the frame 1. The louver structure for a warm air heater according to any one of claims 1 to 3, wherein an air flow directed to the back surface of the inner cover portion 7b is suppressed.