JP2547649Y2 - Hot air heater - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention has a blower fan at the top of a box and a casing provided around the blower fan.
A plurality of tubes are formed in a U-shape at a lower portion, and a heat exchanger is formed by stacking them in parallel and in a row in an upward direction, and a burner is provided at one end of the heat exchanger, and a header is provided at the other end. The present invention relates to a hot air heater in which an exhaust pipe is connected to a side of the header opposite to a blower fan.

[0002]

2. Description of the Related Art A conventional hot air heater of this type will be described with reference to FIGS. (For example, Japanese Utility Model Application Laid-Open No. 58-177)
No. 717) 1 is a burner, which is connected to a heat exchanger 2 which is formed by stacking a plurality of tubes in a U-shape at the tip thereof in parallel and upward in a row. Reference numeral 3 denotes a header. The other end of the heat exchanger 2 is connected to an upper portion, and an exhaust pipe 4 is connected to a lower portion. Reference numeral 5 denotes an electric motor installed above the heat exchanger 2, and a blower fan 6 is attached to a shaft thereof. Reference numeral 7 denotes a casing, which is located around the blower fan 6, and its nose 8 is located below the electric motor 5. Reference numeral 9 denotes a box in which the above-mentioned parts are stored.

The operation of the above configuration will be described below.

[0004] The combustion gas discharged from the burner 1 passes through the heat exchanger 2, passes through the header 3 and the exhaust pipe 4, and exits outside. Heat exchanger 2 heated by burner 1, header 3, exhaust pipe 4
Is blown by a blower fan 6 to exchange heat and heat the room.

[0005]

[Problem to be solved by the invention] In the above configuration,
The heat exchanger 2 has a U-shape, which is an effective structure for reducing the size of the product. However, the U-shaped portion collides with the combustion gas from the burner 1 and locally becomes hot. However, it has the disadvantage of poor reliability.

[0006] In recent years, there has been a demand for quickly warming a room with high-output heating at the start of operation and for maintaining the warmth of the room with low-output heating when the temperature reaches a predetermined temperature, in order to improve comfort.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to meet the above-mentioned drawbacks and requirements, and has a fan at the top of a box and a casing provided around the fan. Then, a plurality of tubes are formed in a U-shape at a lower portion, and the tubes are stacked in parallel and upward in a row, a burner communicating with the heat exchanger, and a second end of the heat exchanger. In a warm air heater having a header and an exhaust pipe A connected to a side opposite to the blower fan of the header, the exhaust pipe A has an inverted U-shape, and the inverted U-shape is a heat exchanger. A nose which is located inside the U-shaped portion and which is inclined near the upper portion of the U-shaped portion of the heat exchanger so as to send a large amount of wind toward the U-shaped portion of the heat exchanger inside the casing around the blower fan. A, and a casing on the side of the casing opposite to the U-shaped side of the heat exchanger. A guide plate A having a predetermined distance from the housing and being wider downward is provided, and a large amount of air is blown toward the U-shaped portion of the heat exchanger below the blower fan inside the casing. A guide plate B is provided in the vicinity of the upper portion of the U-shaped portion of the first embodiment, and a guide plate A is provided at a predetermined interval from the heat exchanger, and a guide plate A extending toward the hot air discharge port is provided below the partition plate A. The provided partition plate B is connected to the end of the L portion of the partition plate A and provided, and a plurality of holes are drilled in the U-shaped heat exchanger of the partition plate A. And a guide plate B and a guide plate C extending downward to the heat exchanger side such that the ends thereof are opposed to the second and third U-shaped heads from the bottom of the U-shaped heat exchanger, A guide plate D extending toward the wall of the box body is provided below the hole formed in the partition plate A, and between the partition plate B and the wall surface of the box body. It was assumed bored a plurality of holes in the box rear section.

[0008]

According to the present invention, as described above, a large amount of wind from the hot air fan is sent to the U-shaped side of the heat exchanger by the nose A and the guide plate, and the other is the guide plate. It is sent to the header side of the heat exchanger from the gap between A and the casing. For this reason, the U-shaped part side which becomes high temperature at the time of high output heating and the header side which becomes high temperature at the time of low output heating are each cooled in large amounts, thereby suppressing the heat exchanger from locally becoming high temperature. Next, the hot air heated to a high temperature by the guide plate A provided on the partition plate B is combined with the wind that has cooled the exhaust pipe from the blower fan between the guide plate A and the guide plate B at the center of the hot air discharge port. It mixes and eliminates the bias of the warm air temperature from the warm air outlet, and the other wind that is not sent to the U-shaped part of the heat exchanger by the wind from the blower fan on the partition plate A and the wall of the box body A plurality of holes on the back of the box send air to the back of the fuselage to help increase the temperature of the lower side of the fuselage during heating operation inside the room, and furthermore, from the casing end of the casing and the guide plate A. The wind cools the root portion of the heat exchanger, which becomes high at the time of low output during the heating operation, and suppresses local heating, and the wind in this portion also suppresses the temperature rise of the operation control unit provided next to the casing. Contribute.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 10 denotes an exhaust pipe A having an inverted U shape, one end of which is opened below the header 3 and the other end of which is opened outside the box body 9 and connected to each other. The inverted U-shaped portion 10a of the exhaust pipe A10 is arranged inside the U-shaped portion of the heat exchanger 2. Reference numeral 11 denotes a nose A provided inside the casing 7 and provided at an upper portion on the U-shaped side of the heat exchanger 2. Reference numeral 12 denotes a guide plate A provided inside the casing 7, and is attached to the upper portion of the straight pipe portion of the heat exchanger 2 at an angle so that the U-shaped portion side of the heat exchanger 2 faces downward. Reference numeral 13 denotes a guide plate B provided inside the casing 7, which is attached to the lower part of the blower fan 6 so as to be inclined such that the U-shaped side of the heat exchanger 2 is on the lower side. Reference numeral 14 denotes a partition plate A which is attached to a gap between the U-shaped projecting end of the heat exchanger 2 and the wall surface of the box 9 while maintaining a predetermined gap with the U-shaped portion. 16,
Reference numeral 17 denotes a guide plate B and a guide plate C attached to the partition plate A14, which are provided so as to face the second and third U-shaped head portions of the U-shaped portion of the heat exchanger 2 from the bottom. 20 is hole A
The partition plate A14 is provided between the guide plate B and the guide plate C. Reference numeral 18 denotes a guide plate D, which is provided with the hole A of the partition plate A14.
At the lower part 20 and on the wall surface of the box 9, it extends and is attached.
Reference numeral 15 denotes a partition plate B to which a guide plate A extending toward the hot air discharge port is attached, and is connected to the end of the L portion of the partition plate A14. Reference numeral 21 denotes a hole B provided between the partition plate B15 on the back of the box and the wall of the box 9. The other components are the same as those of the conventional example, and the description is omitted.

The operation of the above configuration will be described below.

The combustion gas discharged from the burner 1 passes through the heat exchanger 2, passes through the header 3 and the exhaust pipe A10, and exits outside. At this time, if high-output heating is performed, the U-shaped portion mainly becomes hot.
On the other hand, the wind from the blower fan 6 is partially directed to the U-shaped portion of the heat exchanger 2 by the nose A11, the guide plate A12, and the guide plate B13 provided inside the casing 7, and the other portion is directly directed to the heat exchanger 2. The wind is sent to the pipe portion and the inverted U-shaped portion 10a of the exhaust pipe A10, and the remaining part is sent to the root of the heat exchanger 2.

Next, the wind passing between the nose A11 and the guide plate B13 reaches several upper U-shaped portions and the partition plate A14 of the heat exchanger 2 composed of a plurality of heat exchangers.
The lower part of the U-shaped part of the U-shaped part is mainly cooled while reaching the lower part.
Next, in a plurality of lower U-shaped portions of the heat exchanger 2, the guide plate B17 provided on the partition plate A14 causes a U-shaped portion of the heat exchanger 2.
The wind passing through the gap between the wall surface of the box 9 and the partition plate A14 is sent to the heat exchanger 2 by the hole A20, the guide plate C16, and the guide plate D18 provided in the partition plate A14. Since the lower plurality of U-shaped part heads are cooled, the U-shaped part head of the heat exchanger 2 which becomes high temperature is uniformly cooled regardless of whether it is above or below.
High-efficiency, high-reliability, high-output heating with less local heating is possible.

Further, the guide plate B13, the guide plate A
Since the wind between 12 cools the inverted U-shaped portion 10a of the exhaust pipe A10 and reaches the hot air discharge port, further high-efficiency and high-output heating is possible. Next, at the time of low-output heating, the portion of the heat exchanger 2 where the temperature becomes high is mainly the root portion, and in this portion, the wind from between the guide plate A12 and the casing 7 causes There is no local heating because it is cooled.

Incidentally, the wind of the portion also functions to prevent a temperature rise of a control unit (not shown) installed beside the burner 1 even during high-output heating.

Further, during the high-power heating, the hottest portion is the U-shaped head of the heat exchanger 2 as described above, and the hot air temperature at the hot air outlet below this portion is high. However, the guide plate A19 provided on the partition plate B15 draws the warm air toward the center of the warm air discharge port. Here, the hot air flowing through the exhaust pipe 10 is mixed with the warm air and discharged to the room.

The wind passing through the gap between the wall surface of the box 9 and the partition plate A14 is sent to the lower left and right sides of the box 9 which tends to be low in the heating operation by the holes B21 provided on the back surface of the box 9.

[0018]

As described above, according to the present invention, a large amount of wind is sent to the high-temperature portion of the heat exchanger to suppress local heating, improve heat efficiency, and further improve heat efficiency by sending wind to the exhaust pipe. A high-output, high-reliability, hot-air heater capable of comfortable heating, with no bias of the hot-air temperature and a small difference in room temperature, has become possible.

[Brief description of the drawings]

FIG. 1 is a front view of a hot air heater according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II of FIG. 1;

FIG. 3 is a front view of a warm air heater showing a conventional example.

FIG. 4 is a sectional view taken along line HH of FIG. 3;

[Explanation of symbols]

 Reference Signs List 2 heat exchanger 3 header 6 blower fan 7 casing 9 box 10 exhaust pipe A 11 nose A 12 guide plate A 13 guide plate B 14 partition plate A 20 hole 21 hole

Claims (1)

(57) [Scope of request for utility model registration] 1. An air blower fan (6) on an upper part of a box (9),
A heat exchanger (2) having a casing (7) provided around the blower fan (6), a plurality of pipes formed in a U-shape at a lower portion, and stacked in parallel and in a line in an upward direction; ) And a burner (1) leading to the heat exchanger (2);
A hot air heater having a header (3) communicating with the other end of the heat exchanger (2), and an exhaust pipe A (10) connected to the side of the header (3) opposite to the blower fan (6). In the above, the exhaust pipe A (10) has an inverted U-shape, the inverted U-shape is located inside the U-shape of the heat exchanger (2), and a casing around the blower fan (6). (7) Heat exchange inside
Heat exchange to send a large amount of wind toward the U-shaped part of the heat exchanger (2)
Nose A (1) inclined near the upper part of the U-shaped part side of the exchanger (2)
1) and a heat exchanger (2) for a casing (7).
A guide plate A (12) having a predetermined distance from the casing (7) and being wider downward is provided on the side opposite to the U-shaped part side of the casing, and the blower fan (6) inside the casing (7) is provided below.
Send a large amount of wind toward the U-shaped part of the heat exchanger (2)
Guy inclined near the upper part of the U-shaped part of the heat exchanger (2)
A guide plate A (19 ) is provided at a predetermined distance from the heat exchanger (2), and extends under the partition plate A (14) to the hot air discharge port side. ) Provided with a partition B (15) connected to the end of the L portion of the partition A (14), and a heat exchanger (2) composed of a plurality of U-shaped partitions A (14). ), A plurality of holes (20) are drilled, and a guide plate B (17) and a guide plate C (16) extending to the heat exchanger (2) side are provided above and below the holes (20).
The second and third U-shaped heads from the bottom of the U-shaped heat exchanger (2) are provided so as to face each other, and the lower side of the perforated hole (20) of the partition plate A (14) is provided. And a guide plate D (18) extending toward the wall surface of the box (9).
A hot air heater characterized in that a plurality of holes (21) are formed in the back of the box (9) between the wall of the box (9) and the wall of the box (9).