JPH08303864A - Hot air heater - Google Patents

Abstract

PURPOSE: To maintain the temperature of a housing chamber for a control equipment below a frame body partition plate at a low temperature by bending an air shield plate sideward from the back part of a combustion chamber and providing air flow ports respectively at both sides of the frame body partition plate between the air shield plate separated from a convention fan and the back plate of a frame body. CONSTITUTION: Air flow ports are respectively formed at both sides of a frame body partition plate 8 between an air shield plate 9 separated from a convection fan 7 and the back plate 1b of a frame body 1. Air blown into the frame body 1 by the convection fan 7 flows sideward along the curved surface of the air shield plate 9, and to a part below the frame body partitin plate 8 from a remote part near the side plate of the frame body 1. Accordingly, since cooling air is sucked to an equipment control chamber for controlling a burner 2 from both side parts, the temperature raised air is not retained, and the chamber can be maintained at a low temperature by a small quantity of cooling air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling air flow below a frame of a hot air heater.

[0002]

2. Description of the Related Art A burner is attached to the bottom of the frame of a heater,
A combustion chamber that is continuous with the burner is attached to the center of the frame, and a heat exchanger whose inlet is connected to the combustion chamber is attached to the upper part of the frame, and the combustion gas discharged from the heat exchanger is attached. There is known a warm air heater that discharges indoor air blown into a frame body by a convection fan from a warm air outlet provided on a front plate of the frame body while exhausting it outdoors.

A heat shield plate is provided from the bottom to the back of the combustion chamber so that the equipment for controlling the combustion and control of the burner mounted in the frame is not heated by the heat released from the combustion chamber and heat exchanger in the frame. It is provided. The air blown into the frame by the convection fan passes from the heat exchanger through the periphery of the combustion chamber to the hot air outlet, and is also blown to the back surface of the heat shield plate so that the air along the back surface of the heat shield plate is blown. By creating a flow, the abnormal temperature rise of the heat shield is prevented, and the temperature rise of the equipment used for the heater is prevented.

[0004]

The room air blown into the frame by the convection fan hits the heat shield plate and splits into the heat exchanger at the upper part or the device room at the lower part of the frame. , Most of the air flows to the heat exchanger with low flow path resistance. This tendency was more pronounced in the radial type in which the heat shield plate was composed of a reflection plate and had a large front opening that also served as the hot air outlet, and the temperature rise in the equipment room below the frame could not be avoided.

Therefore, as in the case of a warm air type heater, the front of the heat exchanger is covered with a front plate or a heat shield plate to limit the flow path, thereby increasing the amount of air flowing to the equipment room below the frame. In this case, heat exchange in the heat exchanger deteriorates,
The upper part of the frame was unusually hot. Therefore, the air flow flowing near the heat exchanger cannot be extremely throttled, and it is necessary to cool the lower part of the frame with only a small amount of air.

In order to improve the air flow in the space below the frame, instead of limiting the amount of air flowing near the heat exchanger,
A structure that widens the gap between the bottom plate of the heat shield plate and the combustion chamber to facilitate air flow is conceivable. However, in this structure, even if the air blown by the convection fan and directed to the lower part of the frame body once flows into the equipment room at the lower part of the frame body, immediately the gap between the bottom plate of the nearest heat shield plate and the combustion chamber is reached. The air flows out toward the hot air outlet, and high-temperature air continues to stay in most of the equipment chamber below the frame, causing the stored equipment to reach a high temperature.

[0007]

According to the present invention, the inside of the lower frame can be effectively cooled even when the amount of air directed to the lower part of the frame is small, and a burner 2 attached to the lower part of the frame 1 of the heater is used.
A combustion chamber 3 continuous to the upper part of the burner 2 and a flat plate heat exchanger 4 located in the upper part of the frame 1 into which the combustion gas of the combustion chamber 3 flows, A warm air outlet 5 is provided on the front plate 1a of the front frame body 1, and a back plate 1b of the frame body 1 is provided.
An air intake port 6 is formed in the air intake port 6, and a convection fan 7 is attached to the air intake port 6 so that the room air flowing into the frame 1 from the air intake port 6 is transferred to the heat exchanger 4 and the combustion chamber 3 wall. Heat it up
In the warm air heater that discharges from the warm air outlet 5, a frame partition plate 8 is provided which is located in the vicinity of a continuous portion of the combustion chamber 3 and the burner 2 and whose tip is below the warm air outlet 5 The lower part of the heat exchanger 4 is connected to the frame partition plate 8 and the upper part of the flat plate heat exchanger 4 is attached with a wind shield plate 9, and the periphery of the heat exchanger 4 and the heat exchanger 4 and the wind shield plate 9 are attached. Between them is a hot air flow path passing through to the hot air outlet 5, and the wind shield 9 is formed so as to face the convection fan 7 and curve from the back of the combustion chamber 3 to the side. 7 on both sides of the frame partition plate 8 between the wind shield 9 and the back plate 1b of the frame 1 separated from each other.
0 is provided and cooling air is blown from the air circulation port 10.

Further, the frame partition plate 8 is provided with a ring-shaped air outlet 11 between the burner 2 and the combustion chamber 3, and the air flowing into the lower part of the frame partition plate 8 from the air circulation port 10 is used as the frame body. It flows under the partition plate 8 and flows from the air outlet 11 toward the warm air outlet 5.

[0009]

The air blown into the frame body 1 by the convection fan 7 flows upward to reach the vicinity of the combustion chamber 3 from the peripheral edge of the heat exchanger 4, while the air flow downward flows to the frame partition plate 8. It flows downward and flows out of the frame 1. At this time, it is necessary to reduce the air flow flowing along the peripheral edge of the heat exchanger 4 in order to increase the cooling air flow toward the lower side of the frame partition plate 8. There is danger.

In the present invention, the wind shield 9 is curved, and two air circulation ports 10 are provided at positions apart from the convection fan 7. The air blown by the convection fan 7 is stored in the wind shield 9. It flows laterally along the curved surface and flows downward from the frame partition plate 8 from the air circulation port 10 at a distant portion near the side plate of the frame body 1. Therefore, the cooling air is diffused, and the temperature of the control device storage chamber under the frame partition plate 8 can be maintained at a low temperature.

Further, an air outlet 11 is provided between the burner 2 or the combustion chamber 3 and the frame partition plate 8 so that the air flowing into the lower part of the frame partition plate 8 from the vicinity of the burner 2 is separated from the frame partition plate. Since a flow path is formed above 8 to the hot air outlet 5, the cooling air flowing from both sides of the frame partition plate 8 is
The high-temperature air near the burner 2 is discharged from the air outlet 11, and the high-temperature air is not accumulated at all, so that the temperature can be kept low even with a small air flow.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in the drawings. 1 is a frame of a heater, 2 is a burner attached to the lower part of the frame 1, and a combustion chamber 3 is continuously provided on the upper part. is there.
Reference numeral 4 denotes a heat exchanger which is provided on the upper portion of the frame body 1 and through which the combustion gas is sent from the combustion chamber 3 through the connecting pipe 4a. The heat exchanger 4 of the embodiment has two plate-shaped heat exchange chambers. There is.

Reference numeral 12 is a combustion fan for supplying combustion air to the burner 2, 13 is a supply port formed by extending the suction port of the combustion fan 12, and 14 is located in the vicinity of the supply port 13, and the heat exchange is performed. It is an exhaust port communicating with the device 4, and the air supply port 13 and the exhaust port 14 are connected to an intake / exhaust top not shown so that outdoor air is supplied to the burner 2 and exhaust gas is exhausted outdoors.

Reference numeral 5 is a hot air outlet provided on the front plate 1a of the frame 1, and 6 is an air intake provided on the back plate 1b of the frame 1,
The warm air outlet 5 is located opposite to the lower side of the combustion chamber 3, and the air intake 6 is located from the upper part of the combustion chamber 3 to the side of the heat exchanger 4.

Reference numeral 7 is a convection fan attached to the air intake 6, 8 is located in the vicinity of a continuous portion of the burner 2 and the combustion chamber 3, and the inside of the frame 1 serves as a hot air flow path and a device storage chamber of the control device. It is a frame partition plate for partitioning, and the air blown into the frame 1 by the convection fan 7 exchanges heat with the heat exchanger 4 and the wall of the combustion chamber 3.
It becomes warm air and is returned to the room from the warm air outlet 5.

Reference numeral 9 is a wind shield plate whose lower part is connected to the frame partition plate 8 and whose upper part is seen through the lower surface of the plate-shaped heat exchanger 4 and whose side part is opposed to the convection fan 7 and which is for convection. The air blown into the frame body 1 by the fan 7 hits the wind shield 9 and flows upward, and then flows through the vicinity of the heat exchanger 4 and the vicinity of the combustion chamber 3 to the hot air outlet 5. Further, the wind shield 9 is formed so as to be curved from the back of the combustion chamber 3 toward the side, and a part of the air hitting the wind shield 9 is diverted to both sides along the curved surface.

Reference numeral 10 is a wind shield plate 9 separated from the convection fan 7.
And the back plate 1b of the frame 1 are air circulation ports formed on both sides of the frame partition plate 8, and the air blown into the frame 1 by the convection fan 10 is a curved surface of the wind shield plate 9. Along the side of the frame 1, and flows downward from the part of the frame 1 near the side plate to below the frame partition plate 8. Therefore, since cooling air is blown from both sides of the equipment storage chamber for controlling the burner 2, the air whose temperature has risen does not stay, and it is possible to keep the temperature low with a small amount of cooling air.

Reference numeral 11 is a ring-shaped air outlet formed between the burner 2 or the combustion chamber 3 and the frame partition plate 8,
The air flowing downward along the windshield 9 flows from the air circulation port 10 to the lower side of the frame partition plate 8, and the air below the frame partition plate 8 together with the high temperature air near the burner 2 has an air outlet 1
Since the high temperature air did not stay at all, the temperature could be kept low even with a small air flow.

[0019]

As described above, according to the present invention, the frame partition plate 8 is mounted in the frame body 1, and the shape and position of the wind shield plate 9 and the air blown on the wind shield plate 9 are separated by the frame partition plate 8. Since the position of the air circulation port 10 leading to the lower part of the device was specified, convection of high-temperature gas can be prevented in the device storage chamber below the frame partition plate 8 and a low temperature can be maintained even with a small amount of cooling air. .

Further, since the ring-shaped air outlet 11 is provided, the high temperature air heated by the burner 3 and rising rises along with the air flow and quickly flows out from the air outlet 11 to the vicinity of the combustion chamber 3 to form a frame. Since it no longer diffuses into the entire equipment storage chamber below the partition plate 8, the temperature can be easily maintained at a low temperature.

[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 cross-sectional view of a warm air heater showing an embodiment of the present invention.

[Explanation of symbols]

 1 Frame 1a Front Plate 1b Back Plate 2 Burner 3 Combustion Chamber 4 Heat Exchange Chamber 5 Hot Air Outlet 6 Air Intake 7 Convection Fan 8 Frame Partition 9 Wind Bar 10 Air Circulation Port 11 Air Outlet

Claims (2)

[Claims] 1. A burner 2 attached to a lower portion of a frame 1 of a heater, a combustion chamber 3 continuous to an upper portion of the burner 2, and a combustion gas of a combustion chamber 3 located at an upper portion of the frame 1. A heat exchanger 4 in the form of a flat plate into which the air flows, a warm air outlet 5 is provided in the front plate 1a of the frame 1 in front of the combustion chamber 3, and an air intake is provided in the back plate 1b of the frame 1. 6, a convection fan 7 is attached to the air intake 6, and the indoor air flowing into the frame 1 from the air intake 6 is heated by the heat exchanger 4 and the wall of the combustion chamber 3 to heat the air. In the warm air heater that discharges from the air outlet 5, a frame partition plate 8 is provided which is located in the vicinity of a continuous portion of the combustion chamber 3 and the burner 2 and has a tip looking below the warm air outlet 5. The lower part is connected to the frame partition plate 8 and the upper part is attached to the heat exchanger 4 having a flat plate shape, and a wind shield plate 9 is attached to shield the periphery of the heat exchanger 4 and the heat exchanger 4. A hot air flow path passing through the plate 9 to the hot air outlet 5 is formed, and the wind shield plate 9 is formed so as to face the convection fan 7 and curve from the back of the combustion chamber 3 to the side. Wind shield 9 and frame 1 separated from the convection fan 7
A hot-air heater characterized in that air circulation ports 10 are provided on both sides of a frame partition plate 8 between the back plate 1b and the back plate 1b. 2. The frame partition plate 8 is provided with a ring-shaped air outlet 11 between it and the burner 2 or the combustion chamber 3, and the air flowing from the air circulation port 10 to the lower portion of the frame partition plate 8 blows air. The hot air heater according to claim 1, wherein the hot air blower flows from the outlet 11 toward the hot air outlet 5.