JP3863681B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger incorporated in a hot water boiler or the like.
[0002]
[Problems to be solved by the invention]
Conventionally, in this type of heat exchanger, there is a possibility that a kettle noise may occur due to local heating. Therefore, it has been desired to prevent the kettle noise.
[0003]
In view of such circumstances, the present invention provides a heat exchanger capable of preventing the occurrence of squealing and thereby extending the life by preventing local heating that causes squealing. For the purpose.
[0004]
[Means for Solving the Problems]
That is, the present invention is connected to an outer cylinder, a combustion cylinder provided in the outer cylinder, a burner attached to the combustion cylinder, a smoke pipe erected on the upper side of the combustion cylinder, and the outer cylinder. The antifreeze liquid flowing in from the return port is heated by the combustion of the burner in the water chamber between the outer cylinder and the combustion cylinder, and the antifreeze liquid flows out from the forward opening. In the heat exchanger, an annular baffle plate having a vertical plate portion in which a large number of water passage holes are formed is placed on the upper surface of the combustion cylinder so as to be inscribed in the outer cylinder. By adopting such a configuration, when the antifreeze liquid passes through the water chamber, it passes only through the water passage hole formed in the vertical plate portion of the baffle plate, so that a short path of the antifreeze liquid is prevented and at the same time the antifreeze liquid is It acts so as to reach the center of the upper surface of the cylinder and reach the center of the upper surface of the combustion cylinder.
[0005]
Further, the present invention is connected to the outer cylinder, a combustion cylinder provided in the outer cylinder, a burner attached to the combustion cylinder, a smoke pipe erected on the upper side of the combustion cylinder, and the outer cylinder. The antifreeze liquid flowing in from the return port is heated by the burner in a water chamber between the outer cylinder and the combustion cylinder, and the antifreeze liquid flows out from the forward opening. In the heat exchanger, an annular baffle plate having a horizontal bottom plate portion formed with a water passage hole larger than that corresponding to the smoke pipe is placed on the upper surface of the combustion tube with the horizontal bottom plate portion floating. It is configured so as to be inscribed in. With this configuration, when the antifreeze liquid passes through the water chamber, it passes only through the water passage holes formed in the horizontal bottom plate portion of the baffle plate, so that a short path of the antifreeze liquid is prevented and at the same time the antifreeze liquid is uniformly distributed above the combustion cylinder. Acts to distribute.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0007]
<First Embodiment>
FIG. 1 is a front view showing a first embodiment of a heat exchanger according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the heat exchanger shown in FIG.
[0008]
As shown in FIG. 1, the heat exchanger 1 has a cylindrical outer cylinder 2, and a substantially cylindrical combustion cylinder 3 is disposed between the outer cylinder 2 and a water chamber 5 in the outer cylinder 2. It is installed to form. Further, an antifreeze return port 13 is connected to the lower part of the outer cylinder 2 so as to communicate with the water chamber 5, and an antifreeze solution outlet 15 is connected to the upper part of the outer cylinder 2 so as to communicate with the water chamber 5. Has been. On the other hand, a burner 6 is attached to the lower part of the combustion cylinder 3 in a lateral direction so as to form a flame toward the inside of the combustion cylinder 3, and a disc-shaped refractory material 7 made of ceramic fibers is attached to the bottom of the combustion cylinder 3. Is placed. Further, as shown in FIG. 2, a large number of smoke tubes 9 formed in a cylindrical shape are erected on the upper side of the combustion cylinder 3 so as to communicate with the combustion chamber in the combustion cylinder 3. An annular baffle plate 10 is placed on the outer surface of the outer cylinder 2 so as to surround a large number of smoke tubes 9.
[0009]
The baffle plate 10 is formed in an S-shaped annular shape in which a horizontal upper plate portion and a horizontal lower plate portion are integrally connected by a vertical plate portion, and a plurality of water passage holes 12 are formed in the vertical plate portion. Are evenly spaced at equal angular intervals.
[0010]
Since the heat exchanger 1 has the above-described configuration, when the heat exchanger 1 is used, the temperature of the combustion chamber in the combustion cylinder 3 is raised by the flame of the burner 6, and the antifreeze liquid flowing in from the return port 13 is water. The chamber 5 rises while raising the temperature and flows out from the outlet 15. At this time, the flow of the antifreeze liquid passing through the water chamber 5 is changed by 90 ° by the baffle plate 10 and moves toward the center of the upper surface of the combustion cylinder 3 as indicated by an arrow in FIG. In addition, since the antifreeze liquid flows only through the water passage holes 12 of the baffle plate 10, the flow velocity increases and reaches the center of the upper surface of the combustion cylinder 3. As a result, in addition to preventing the situation where the antifreeze liquid passes through the shortest path connecting the return port 13 and the outgoing port 15 (short path of the antifreeze liquid), there is no region where the antifreeze liquid is contained, and therefore local heating does not occur. Therefore, no ringing occurs, and the life of the heat exchanger 1 is extended accordingly.
[0011]
<Second Embodiment>
FIG. 3 is a front view showing a second embodiment of the heat exchanger according to the present invention, and FIG. 4 is a cross-sectional view taken along line AA of the heat exchanger shown in FIG.
[0012]
As shown in FIG. 3, the heat exchanger 1 has a cylindrical outer cylinder 2, and a substantially cylindrical combustion cylinder 3 is disposed between the outer cylinder 2 and the water chamber 5 in the outer cylinder 2. It is installed to form. Further, an antifreeze return port 13 is connected to the lower part of the outer cylinder 2 so as to communicate with the water chamber 5, and an antifreeze solution outlet 15 is connected to the upper part of the outer cylinder 2 so as to communicate with the water chamber 5. Has been. On the other hand, a burner 6 is attached to the lower part of the combustion cylinder 3 in a lateral direction so as to form a flame toward the inside of the combustion cylinder 3, and a disc-shaped refractory material 7 made of ceramic fibers is attached to the bottom of the combustion cylinder 3. Is placed. Further, as shown in FIG. 4, a large number of smoke tubes 9 formed in a cylindrical shape are erected on the upper side of the combustion cylinder 3 so as to communicate with the combustion chamber in the combustion cylinder 3. A disc-shaped baffle plate 11 is placed on the outer surface of the outer cylinder 2 so as to surround a large number of smoke tubes 9.
[0013]
The baffle plate 11 is composed of a horizontal bottom plate portion and a vertical plate portion. As shown in FIG. 4, the horizontal bottom plate portion has a water passage hole 14 slightly larger than that corresponding to each smoke tube 9. A plurality of (for example, five) countersinks 16 are provided so as to protrude downward.
[0014]
Since the heat exchanger 1 has the above-described configuration, when the heat exchanger 1 is used, the temperature of the combustion chamber in the combustion cylinder 3 is raised by the flame of the burner 6, and the antifreeze liquid flowing in from the return port 13 is water. The chamber 5 rises while raising the temperature and flows out from the outlet 15. At this time, since the baffle plate 11 is in a state where the horizontal bottom plate portion is floated by the seating push 16, the antifreeze liquid passing through the water chamber 5 flows only through the water passage holes 14 of the baffle plate 11, and It will be distributed uniformly on the upper side. As a result, in addition to preventing a short path of the antifreeze liquid, there is no region where the antifreeze liquid stagnate, so local heating does not occur. Therefore, no ringing occurs, and the life of the heat exchanger 1 is extended accordingly.
[0015]
The height of the baffle plate 11 can be adjusted by using the pressing 16 of the baffle plate 11, and the baffle plate 11 is positioned by making a hole in the center of the horizontal bottom plate portion of the baffle plate 11. It can also be done.
[0016]
【The invention's effect】
As described above, according to the present invention, the outer cylinder, the combustion cylinder provided in the outer cylinder, the burner attached to the combustion cylinder, the smoke pipe erected on the upper side of the combustion cylinder, The antifreeze that has flowed from the return port is heated by the combustion of the burner in the water chamber between the outer tube and the combustion tube. In the heat exchanger that flows out from the outlet, an annular baffle plate having a vertical plate portion in which a large number of water passage holes are formed is placed on the upper surface of the combustion cylinder so as to be inscribed in the outer cylinder. Since the antifreeze liquid passes through the water passage formed in the vertical plate part of the baffle plate when the antifreeze liquid passes through the water chamber, a short path of the antifreeze liquid is prevented and at the same time the antifreeze liquid is centered on the upper surface of the combustion cylinder. Since it reaches the center of the upper surface of the combustion cylinder To prevent the kettle sound due to heat, it is possible to provide a heat exchanger capable hence extending the life.
[0017]
Further, according to the present invention, an outer cylinder, a combustion cylinder provided in the outer cylinder, a burner attached to the combustion cylinder, a smoke pipe erected on the upper side of the combustion cylinder, and the outer cylinder The antifreeze that has flowed from the return port is heated by the combustion of the burner in the water chamber between the outer cylinder and the combustion cylinder, and the antifreeze liquid is supplied from the return port. In the heat exchanger to be discharged, an annular baffle plate having a horizontal bottom plate portion formed with a water passage hole corresponding to the smoke pipe is formed on the upper surface of the combustion cylinder with the horizontal bottom plate portion floating. Since it is configured to be inscribed in the outer cylinder, when the antifreeze liquid passes through the water chamber, it passes only through the water passage hole formed in the horizontal bottom plate portion of the baffle plate, thus preventing a short path of the antifreeze liquid. At the same time, the antifreeze is evenly distributed above the combustion cylinder. It from to prevent the occurrence of the kettle sound due to local heating, it is possible to provide a heat exchanger capable hence extending the life.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment of a heat exchanger according to the present invention.
2 is a cross-sectional view of the heat exchanger shown in FIG. 1 taken along line AA.
FIG. 3 is a front view showing a second embodiment of a heat exchanger according to the present invention.
4 is a cross-sectional view taken along line AA of the heat exchanger shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Heat exchanger 2 ... Outer cylinder 3 ... Combustion cylinder 5 ... Water chamber 6 ... Burner 9 ... Smoke pipes 10, 11 ... Baffle plates 12, 14 ... Water vent 13 ... Return port 15 ...... Outbound

Claims (2)

An outer cylinder, a combustion cylinder provided in the outer cylinder, a burner attached to the combustion cylinder, a smoke pipe erected on the upper side of the combustion cylinder, a return port connected to the outer cylinder, and an outgoing line In the heat exchanger, the temperature of the antifreeze flowing in from the return port is raised by burning the burner in the water chamber between the outer cylinder and the combustion cylinder, and the antifreeze liquid flows out from the outlet.
A heat exchanger characterized in that an annular baffle plate having a vertical plate portion in which a large number of water passage holes are formed is placed on the upper surface of the combustion cylinder so as to be inscribed in the outer cylinder. An outer cylinder, a combustion cylinder provided in the outer cylinder, a burner attached to the combustion cylinder, a smoke pipe erected on the upper side of the combustion cylinder, a return port connected to the outer cylinder, and an outgoing line In the heat exchanger, the temperature of the antifreeze flowing in from the return port is raised by burning the burner in the water chamber between the outer cylinder and the combustion cylinder, and the antifreeze liquid flows out from the outlet.
An annular baffle plate having a horizontal bottom plate portion having a water passage hole larger than that corresponding to the smoke tube is inscribed in the outer cylinder on the upper surface of the combustion cylinder with the horizontal bottom plate portion floating. A heat exchanger characterized by being mounted.

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