JP3195732B2 - Hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called FF type warm air heater for heating by exchanging heat between exhaust gas generated by combustion and room air.

[0002]

2. Description of the Related Art Conventionally, in a hot air heater of this type, high-temperature exhaust gas generated by combustion of a combustion burner in a combustion chamber flows into the exhaust chamber from the combustion chamber, and further from the exhaust chamber to a heat exchanger. After flowing in, it was discharged outside through the exhaust port through the exhaust collecting chamber. In addition, the high temperature exhaust gas generated in the combustion chamber, such as the combustion chamber, the exhaust chamber, the heat exchanger, the exhaust collective chamber, etc., passes through the joint 102 around the two parts as shown in FIG. It consisted of crimping, that is, bending one side once and sandwiching the other.

[0003]

However, in this conventional device, when heated or cooled immediately after the start of operation or immediately after the stop of operation, the crimped portions are displaced due to the expansion and contraction of the metal and generate a clicking sound. There is a problem that gives a discomfort to the person or is mistaken for an abnormality or failure. In addition, the corner portions of the corners have a problem that when they are crimped, wrinkles are generated and the caulking tends to be insufficient, and the exhaust gas leaks therefrom and mixes with the warm air blown into the room.

[0004]

SUMMARY OF THE INVENTION The present invention focuses on this point, and in order to solve the above-mentioned drawbacks, in particular, its structure is described in claim 1
In combustion bars - a heat exchanger for circulating a combustion chamber communicating with the exhaust chamber provided with a burner, the exhaust gas from the exhaust chamber,
An exhaust gas passage is constituted by an exhaust gas collecting chamber which collects the exhaust gas after the heat exchange and guides the exhaust gas to an exhaust port, and heat exchanges room air from a convection fan and discharges it as warm air. Part or all of the joints that make up the road
The caulked parts of the joint are mated with each other.
To prevent expansion and contraction of the joint,
Bend at least once and crimp the other
It is crimped so as to cover at least one crimped portion . The warm air warming according to claim 2 of the present invention.
The unit has a combustion burner and communicates with the exhaust chamber.
Combustion chamber and heat exchanger for passing exhaust gas from exhaust chamber
And the exhaust gas that collects the exhaust gas after heat exchange and guides it to the exhaust port.
Combined room and exhaust gas flow path
In what exchanges indoor air heat and releases it as warm air,
The joint of the components constituting the exhaust gas flow path has a cross section
Are crimped so as to form a crank shape.
In the hot air heater according to claim 3 of the present invention, a combustion burner is used.
And a combustion chamber that communicates with the exhaust chamber.
Heat exchanger for passing exhaust gas and exhaust gas after heat exchange
Exhaust gas flow by the exhaust collecting chamber
Route and heat exchange of indoor air from the convection fan
At the junction of the heat exchanger
Was caulked so that its cross section became a crank shape
Things.

[0005]

According to the hot air heater according to claim 1 having the above configuration,
If it does, some or all of the components that make up the exhaust gas
The swaged parts of the joint are joined together
The crimping of the joint so that
Bend at least once and crimp the other
Make sure to cover one side of the caulking bent at least once
It is caulked, so that immediately after starting operation,
When expanding or contracting during heating or cooling immediately after operation is stopped,
When it shrinks , the other expands by the same amount, and when one shrinks , the other shrinks by the same amount, so that there is no displacement due to expansion and contraction in the swaged portion, and no "pip-pitch" sound is generated. Also,
Corners where wrinkles are likely to occur due to crimping
The radius of the part becomes larger and it is stretched to pull it
As a result, wrinkles are less likely to occur, and
Gas gas leakage can be prevented.

[0006] Further, according to the second aspect of the present invention, the hot-air heating of the above configuration.
According to the machine, the joints of the components constituting the exhaust gas flow path,
Bend one crimped portion twice, that is, form two corners
To make the cross section into a crank shape, and the other crimped part is
It was caulked so as to cover the
The parts restrict each other's expansion and contraction, and the occurrence of displacement due to expansion and contraction
And the radius of the curve at the corners
Become larger, and wrinkle the corners
Can be further prevented from occurring. Also the above configuration
According to the warm air heater according to claim 3, the heat exchanger
Bend one of the crimped parts twice,
Two sections are formed to make the cross section a crank shape, and the other is caulked
The part is swaged to cover it,
The crimped part regulates each other's expansion and contraction more and more
Further prevention of misalignment, and further bending of corners
As the radius of the wire increases, the caulking
It is possible to further prevent the wrinkles from being generated in the corner portion.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hot air heater according to the present invention. 1 is a premixed vaporization type combustion bar.
The main body 3 is a cylindrical combustion chamber formed by caulking a joint 5 of an upper end 4 above the main body 3 into an L-shaped cross section. Elevation suppressing means 7, which is a perforated cylinder that is suspended from above by four support legs 6 and suppresses an increase in exhaust gas, is provided.

Reference numeral 8 denotes an exhaust chamber which communicates with the upper portion of the combustion chamber 1 and is formed by caulking a joint portion 11 around the bottom portion 9 and the upper portion 10 into an L-shaped cross section. A plate 12 is further provided, and a baffle plate 14 that is upwardly inclined is provided so as to cover more than half of the communication port 13 in order to make exhaust gas detour and flow into the communication port 13 with the combustion chamber 1. Have been.

Reference numeral 15 denotes a group of heat exchangers provided in parallel with the combustion chamber 1 so as to communicate with the exhaust chamber 8, and three flat box-shaped heat exchangers 16 are arranged in such a manner that the short sides are in the front-rear direction. It is configured and easily assembled. Each heat exchanger 16 has a joint 19 between an upper plate 17 and a lower plate 18.
Are caulked into an L-shaped cross section, so that a plurality of recesses 20 formed by abutting recesses from both long sides at the center inward are arranged in a zigzag pattern, thereby forming a plurality of meandering paths inward. Is what you are doing.

Reference numeral 21 denotes three partition plates for dividing and guiding the exhaust gas flowing into each heat exchanger 16 in the exhaust chamber 8 so that the exhaust gas goes round and flows into the heat exchanger 16 from above and behind. The rear is notched upright.

Reference numeral 22 denotes an exhaust collecting chamber which is provided below the heat exchanger group 15 and collects exhaust gas having passed through the heat exchangers 16 again. A joining section 25 between the exhaust port storage section 23 and the heat exchanger connecting section 24 is provided. Is caulked into an L-shaped cross section, so that a straightening plate 26 formed of a single plate against which exhaust gas from each heat exchanger 16 collides is provided inward, and an exhaust port 27 is provided at the rear. . The combustion chamber 1, the exhaust chamber 8, the heat exchanger group 15, the exhaust collecting chamber 22, and the exhaust port 27 constitute an exhaust gas flow path.

A convection fan (not shown) provided behind the combustion chamber 1, the exhaust chamber 8, and the heat exchanger group 15.
Then, the room air is sucked in, the air is blown between the above-mentioned parts, and the heat is exchanged with the exhaust gas to generate hot air, and the room is heated with hot air.

Next, the joints 5, 1 according to the embodiment of the present invention will be described.
The crimping combinations 1, 19 and 25 will be described. 2 and 3 are an enlarged view of a main part of a corner portion of the exhaust chamber 8 in the embodiment of the present invention and a sectional view thereof. Incidentally, the cross section of FIG.
In the figure, the upper part 10 is built into the combustion chamber 1 with the lower side facing down.
is there. First, a crimped portion around one upper portion 10 of the exhaust chamber 8 is formed in an L-shaped cross section, and a crimped portion around the other bottom portion 9 is also an L-shaped cross section, and the length of the rising portion is reduced. It is formed longer than the crimped portion of the upper part 10.

Then, the bottom 9 and the upper 10 are put together,
By pressing the joint portion 11 where the caulking portions around each other are in contact, the caulking portion of the bottom 9 is
It is assembled by caulking so as to cover the caulking part. In other words, one corner portion is formed on one side of the caulking assembly, and the other side is covered with the caulking.

At this time, the upper portion 10 is moved from the tip of the bottom portion 9 which is swaged so as to cover the swaged portion of the upper portion 10.
The distance to the press-formed portion of the present invention is larger in X of the present invention than in the conventional single bending x. That is, in the crimped state, the radius of the curve of the corner portion of the other crimped portion that is crimped so as to cover one is larger in the radius R of the present invention than in the conventional single-bend r.

Accordingly, the corner portion is compressed by press forming for forming the central portion into a box shape, and further compressed to bring about wrinkles due to crimping with other parts. The other caulking portion to be covered has a larger radius of the curved portion at the corner portion than the conventional single bending, and is stretched to be stretched as compared with the conventional single bending, so that wrinkles are less likely to occur.

Next, the operation of the embodiment of the present invention will be described. Now, if the combustion burner 2 is burned and the convection fan is driven, the high-temperature exhaust gas generated by the combustion is exhausted outside through the exhaust gas passage. In other words, the exhaust gas rises in the combustion chamber 1 and proceeds into the exhaust chamber 8 while the rising speed is suppressed by the upper rise suppressing means 7, and the exhaust gas detours by the baffle plate 14 in the communication port 13 which is the entrance, and In the plate 21, the exhaust gas is divided into a plurality of parts and flows into each heat exchanger 16 from above and behind.

On the other hand, the exhaust gas which has flowed into each heat exchanger 16 is dispersed and flows through a plurality of meandering paths formed by the concave portions 20, and the exhaust gas after heat exchange collides with the exhaust gas. The exhaust gas is discharged from the exhaust port 27 to the outside through the exhaust collecting chamber 22 provided with the rectifying plate 26 for rectifying the air.
Good hot air heating can be performed.

At this time, each component expands due to high temperature exhaust gas generated by combustion. However, in the caulked portion having an L-shaped cross section, if one caulked portion is to be expanded, the other caulked portion must be expanded by the same amount. The amount of expansion on one side is regulated,
After all, in the swaged portion, both have the same expansion amount.

Conversely, when the combustion is stopped and each part is cooled by the outside air or the like, each part which has been expanded by the heat of the exhaust gas is contracted in the opposite direction. Then, when one caulking portion tries to shrink, if the other caulking portion does not shrink the same amount, the amount of shrinkage of one of the caulking portions is regulated, and eventually both of the caulking portions have the same shrinkage amount.

[0021] Thereby, in the expansion or contraction during heating or cooling, there is no shift in the expansion or contraction of the crimped portion, so that it is possible to prevent the generation of a "pip" sound when the shift occurs. is there. Particularly, in the heat exchanger 16 in which a large temperature difference occurs due to heat exchange, the effect is remarkable, and most of the generation of the “pip-pitch” sound is achieved by crimping the joint 19 of the heat exchanger 16 into an L-shaped cross section. It can be prevented.

FIG. 5 shows another embodiment in which one caulking portion is bent twice, that is, two corners are formed to form a crank-shaped cross section, and the other caulking portion is caulked so as to cover it. It is.

As compared with the previous embodiment, higher precision is required at the time of press working. However, the crimped portions further restrict the expansion and contraction of each other to further prevent the occurrence of displacement due to expansion and contraction, and furthermore, to reduce the corners of the corners. The radius of the curve of the portion becomes large, so that it is possible to further prevent the generation of wrinkles at the corner portion of the caulking portion on the covering side.

[0024]

As described above, according to the hot air heater of claim 1,
Accordingly, the combustion chamber 1 having the combustion burner 2 and communicating with the exhaust chamber 8, the heat exchanger 16 for flowing the exhaust gas from the exhaust chamber 8, and the exhaust port 27 for collecting the exhaust gas after heat exchange are collected.
An exhaust gas flow path by the exhaust collecting chamber 22 leading to
In the case of exchanging the indoor air from the convection fan with heat and discharging it as warm air, a joining part of all or a part of the parts constituting the exhaust gas flow path is crimped and the joining part is caulked.
Make sure that the joints restrict the expansion and contraction of each other
Bend at least one time and crimp
One of the caulking bent at least once by the other
Since it is a caulked assembly so as to cover, the caulked part of the connection part regulates the expansion and contraction of each other, so that there is no shift due to expansion and contraction at the time of heating or cooling at the start or stop of operation, `` This makes it possible to prevent the generation of a "squeaking" sound. Further, in the corner portion which is likely to be wrinkled due to being compressed by press molding or crimping, the radius of the tip portion of the other crimping portion on the side covering one becomes large, so that it is stretched so as to be pulled by the increase. For this reason, wrinkles are less likely to occur, and leakage of exhaust gas from the wrinkle portions can be prevented. Another contract
According to the warm air heater of claim 2, the exhaust gas flow path is formed.
Bend one of the crimped parts twice, and
Angles are formed in two places to make the cross section a crank shape, and the other
The squeezed part is swaged to cover it.
As a result, the swaged parts further regulate each other's expansion and contraction
Further prevents the occurrence of misalignment due to
The radius of the curve of the part increases, and the crimping part on the side to cover
Can prevent wrinkles from occurring at the corners of
is there. Further, according to the warm air heater according to claim 3 having the above configuration,
If the joint of the heat exchanger, one caulked part twice
Bending, that is, forming two corners and making the cross section a crank shape
Caulking so that the other caulking part covers it
This allows the crimped parts to stretch each other more
Regulations to further prevent the occurrence of misalignment due to expansion and contraction.
The radius of the curve at the corner of the corner increases,
Prevents the formation of wrinkles at the corners of crimped parts
Can do

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot-air heater provided with an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the exhaust chamber.

FIG. 3 is an aa cross-sectional view of the same.

FIG. 4 is a sectional view of the heat exchanger.

FIG. 5 is a cross-sectional view of a main part of an exhaust chamber of a hot air heater having another embodiment.

FIG. 6 is an enlarged view of a main part of an exhaust chamber of a conventional warm air heater.

FIG. 7 is a bb sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Combustion burner 8 Exhaust chamber 16 Heat exchanger 22 Exhaust collecting chamber 27 Exhaust port

Continuation of the front page (56) References JP-A-7-318290 (JP, A) JP-A-6-11192 (JP, A) JP-A-49-75157 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F24H 3/08 F28F 9/02 301

Claims (3)

(57) [Claims] 1. A combustion chamber having a combustion burner and communicating with an exhaust chamber, a heat exchanger for flowing exhaust gas from the exhaust chamber, and an exhaust assembly for collecting the exhaust gas after heat exchange and guiding the exhaust gas to an exhaust port. The exhaust gas passage is constituted by the chamber and the room air from the convection fan exchanges heat and is discharged as hot air, and a part or all of the joints of the parts constituting the exhaust gas passage are caulked. The crimped parts of the joints are
Caulking joints to restrict expansion and contraction of the other party
Bend it at least once and crimp the other
Cover at least one side of the caulking bent at least once
Warm-air heating machine, characterized in that it was set crimped. 2. A combustion burner is provided and an exhaust chamber is communicated.
Heat exchange between the burned combustion chamber and the exhaust gas from the exhaust chamber
Heat exchanger and the exhaust gas after heat exchange are collected and led to the exhaust port.
An exhaust gas flow path is formed by the air collecting chamber, and a convection fan
Heat exchange between these indoor air and release as warm air
The hot-air heater is characterized in that the joints of the components constituting the exhaust gas flow passage are caulked so that the cross section thereof has a crank shape . 3. A combustion chamber having a combustion burner and communicating with an exhaust chamber, a heat exchanger for flowing exhaust gas from the exhaust chamber, and an exhaust assembly for collecting the exhaust gas after the heat exchange and guiding the exhaust gas to an exhaust port. The exhaust gas flow path is constituted by the chamber and the heat exchanges the room air from the convection fan and emits it as hot air. In this case, the joint of the heat exchanger is caulked so that its cross section has a crank shape. A warm air heater characterized by being assembled.