JPS585889Y2 - Hot air heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air heating device, and more particularly to a heat exchanger structure in which a burner portion and an exhaust pipe are communicated with each other.

Conventionally, hot-air heaters that have a burner section that performs diffusion combustion employ a combustion system in which a heat exchanger 22 is also used within the exterior casing 21, as shown in Figs. One end of the combustion chamber 23 is equipped with a burner section 24 that performs diffusion combustion, and the other end protrudes outside the exterior 21 through a communication passage 25. The exhaust pipe 2 is
7 is connected.

In addition, FIG. 4 shows the BB' cross section in FIG.
8 is a blower driven by an electric motor 29;
The intake port 31 that sucks air into the exterior 21 by the drive of the blower 28 indicates the discharge port that discharges hot air to the outside of the exterior 21, and the solid line arrow indicates the air flow, and the dashed-dotted line arrow indicates the burner section 24. The flow of high temperature combustion exhaust gas generated in

With the above configuration, the high temperature combustion exhaust gas generated in the burner section 24 is transferred to the heat exchanger 22 and the communication path 25.
The air is discharged to the outside from the exhaust pipe 27 via the connection box 26 and sucked in from the air supply port 30 by the blower 28, which is converted into warm air by the heat exchanger 22 and discharged from the discharge port 31 to the outside of the exterior 21. Served for heating.

On the other hand, hot air heaters that have a burner section that performs diffuse combustion have the advantage of short ignition time or rise time of hot air temperature, but have the disadvantage of extremely high noise due to combustion, especially when the exhaust stack is heated. The disadvantage is that the noise emitted to the outside through the heater is significantly larger than that of other systems, for example, hot air heaters having a pot-shaped burner section.

On the other hand, conventionally, as shown in FIG.
A countermeasure has been taken by configuring the inside of the junction box 26 that connects the exhaust pipe 27 and the exhaust pipe 27 as a silencer such as an expansion type silencer.

However, in the conventional case, the junction box 26 is provided outside the exterior casing 21, and because it gets overheated by the high-temperature combustion exhaust gas flowing inside, the outer surface is heat-insulated to prevent fires or burns. There was a drawback that had to be done.

Furthermore, since the muffler is provided outside the exterior, there is a drawback that the installation space for the hot air heater becomes large, especially the distance between the walls of the house behind it.

Furthermore, when using a burner that performs diffusion combustion, the turbulence of the hot air flowing inside the exchanger is significant, and this has become one of the sources of noise.

This invention improves the above-mentioned conventional drawbacks, eliminates the need for insulation treatment of the silencer of the hot air heater, and dramatically reduces the installation space of the hot air heater, especially the distance between the walls of the house behind it. The purpose of this is to obtain an effective trembling sound effect without increasing the volume.

The present invention takes the following technical measures to achieve the above object.

That is, it includes a heat exchanger that has a diffuse combustion type burner section at one end and communicates with the exhaust stack at the other end, and a blower that blows air to the outer surface of the heat exchanger, and a blower that blows air to the burner section side within the heat exchanger. A generally conical baffle member with a protruding shape is provided, and a large number of small holes are formed in this baffle member, and this baffle member is arranged so that the hot air flow generated in the burner portion passes through the small holes. This hot air heating device has a heat exchanger structure that suppresses the generation of turbulence contained in the hot air flow flowing through the heat exchanger.

As a result, it was possible to reduce noise without providing a muffler outside the exterior of the hot air heater or expanding the installation space of the hot air heater.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, a heat exchanger 4 is disposed inside the exterior body 1, and the burner part 2 is connected to one end and the exhaust pipe 3 is connected to the other end.
Furthermore, a blower sucks indoor air into the interior of the exterior body 1 through the suction port 5, blows it to the outer peripheral surface of the heat exchanger 4, turns the air inside the exterior body into warm air, and then releases the air into the room again through the air outlet 6. 7 is built in.

8 indicates an electric motor for driving the blower.

A solid line arrow a indicates the flow direction of the air inside the exterior body 1 caused by the blower 7, and a chain line arrow a indicates the flow direction of the hot air flow composed of combustion exhaust gas.

Inside the heat exchanger 4, between the burner part 2 and the exhaust pipe 3, there are many small holes 9 projecting in the direction of the burner part 2. A member 10 is provided, and the hot air generated in the burner section 2 is configured to flow through the small hole 9 of the baffle member 10 before reaching the exhaust pipe.

In the above configuration, when the high temperature hot air generated by the burner section 2 passes through the heat exchanger 4, it heats the baffle member 10 made of a perforated plate and the wall surface of the heat exchanger 4, and then the exhaust pipe 3 is heated. It is discharged to the outside of the exterior body 1 through the casing 1.

In addition, the high temperature hot air passing through the inside of the heat exchanger 4 is
Because it is generated by diffusion combustion, the flow contains significant turbulence.

According to this embodiment, since the baffle member 10 having a large number of small holes 9 is disposed, when the hot air flow 1] passes through the small holes 9, the turbulence contained in the hot air flow is reduced. By suppressing the noise generated by the turbulent flow, the noise emitted to the outside from the exhaust stack 3 can be significantly reduced.
Since the heat exchanger 4 has a substantially conical shape with a protruding shape toward the
The hot air flowing inside the baffle member 10 bends from its apex toward the hem, that is, toward the inner wall surface of the heat exchanger 4, so that when the hot air flows, it actively contacts the wall surface of the heat exchanger 4. This makes the heating of the wall surface of the heat exchanger 4 more effective, and since the baffle member 10 acts as a flow resistance against the hot air flow, it is possible to further promote the heating of the heat exchanger by the hot air flow. I can do it.

Therefore, the heat exchange efficiency of the heat exchanger can be improved, and high-temperature warm air can be obtained.

As described above, the hot air heating device of the present invention has a substantially conical baffle member with a large number of small holes inside the heat exchanger facing the diffusion combustion type burner section, thereby distributing high-temperature hot air. It is designed to suppress the significant turbulence contained in the flow and suppress the noise generated by the turbulence, making it unnecessary to install a muffler on the outside of the exterior, and therefore making it easier for hot air heaters. Noise emitted to the outside from the exhaust stack can be reduced without expanding the installation space.

Moreover, the heat exchange efficiency can be improved by making contact between the heat exchanger wall surface and the hot air flow more effective, and there is an effect that high temperature warmth can be obtained.

In addition to forming a conical baffle member using a perforated plate, generation of noise due to suppression of turbulent flow can also be suppressed by using a grid-shaped baffle.

In this case, the gaps between the lattices can become small holes,
There is no difference from the perforated plate used in the examples.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the hot air heating device according to the embodiment of the present invention with the front side opened, Fig. 2 is a sectional view taken along the line A-A' in Fig. 1, and Fig. 3 is a conventional hot air heating device. The side view of FIG. 4 is similar to that of FIG. 3. In the cross-sectional view taken along line B', 4...heat exchanger, 7...blower, 9...
Curved/Small hole, 1o...Curved baffle member.

Claims (1)

[Scope of utility model registration request] A heat exchanger having a diffuse combustion type burner section arranged at one end and communicating with the exhaust stack at the other end, and a blowing mechanism for blowing air to the outer surface of the heat exchanger, the heat exchanger being arranged inside the heat exchanger toward the burner section side. A generally conical baffle member with a protruding shape is provided, and a large number of small holes are formed in this baffle member, and this baffle member is arranged so that the hot air flow generated in the burner portion passes through the small holes. Hot air heating device.