JPS587242Y2 - Hot air machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air fan that uses exhaust gas and has a built-in burner.

As shown in FIG. 7, this type of conventional hot air fan exchanges heat by blowing air through a plurality of pipes A from a fan B, but the exhaust gas flows uniformly through each pipe A, resulting in low heat exchange efficiency.

Therefore, the purpose of this invention is to increase heat exchange efficiency, and to achieve this purpose, a guide plate is installed to guide high-temperature exhaust gas to the pipe near the circulation fan. Since heat exchange is performed between the pipes through which the exhaust gas flows, the heat exchange efficiency is increased.

An embodiment of the present invention will be described below based on the accompanying drawings.

In the figure, 1 is a box-shaped burner case that houses a burner (not shown) inside and is fixed to the chassis 2; 3 is a combustion cylinder that is placed on the top of the burner case 1 and has the same projected cross section as the burner case 1; Reference numeral 4 indicates an expansion chamber which is placed on the upper part of the combustion tube 3 and is configured to expand laterally than the projected cross section of the combustion tube and has a boat-bottom shape. A plurality of pipes 7 connecting the holes provided in the bottom of the air collection chamber 6 having a larger projected area than the expansion chamber 4 are located next to the burner case 1 and in front of the overhang of the expansion chamber 4, This is a fan device that houses a fan and motor (not shown) inside and is mounted on the chassis, and its upper exhaust port is connected to the flue 8.
The lower air outlet is connected to the burner in the burner case 1 via an air pipe 9.

Reference numeral 10 designates a case body in the form of a box frame, which accommodates the above-mentioned components and has a front surface of the pipe 5 opened to form an air outlet 11 having a plurality of grilles, and a circulation fan 12 fixed to the rear of the pipe 5.

Further, 13 is an oil pipe to the burner, 14 is an expansion chamber located between the air collection chamber 6 and the fan device 7 for effective heat dissipation of exhaust gas, and 15 is an expansion chamber located within the expansion chamber 4, as shown in FIG. As shown in Fig. 8, the circulation fan 12 side is inclined upward as much as possible, and this inclination allows as much exhaust gas as possible to be transferred to the circulation fan 1.
A guide plate 16 that allows the flow to flow well into the pipe 5 on the 2 side.
17 and 18 are a partition plate provided between the pipe 5 group and the flue 8 in the collecting pipe 6, and an outside air intake port and an exhaust gas discharge port, respectively, which are vertically and horizontally shifted on the back side of the case body 10. It is provided for convenience when connecting hoses.

In the above configuration, when fuel is supplied into the burner from the oil pipe 13 and at the same time air for combustion is supplied by driving the fan device 7, combustion occurs in the burner, and the high-temperature exhaust gas passes through the combustion tube 3 and enters the expansion chamber 4. to go into.

Since the projected surface of the expansion chamber 4 is larger than the combustion tube 3, the high-temperature exhaust gas is dispersed in the expansion chamber 4, spreads out laterally, passes through the pipe 5 in the upper part of the expansion chamber 4, and flows into the air collection chamber 6.

Since the circulation fan 12 and the air outlet 11 are provided opposite the pipe 5, the hot air inside the vibrator 5 is cooled down by heat transfer on the pipe surface while passing through the pipe 5, and at the same time, the circulating air becomes high temperature. Perform heat exchange.

Heat exchange increases as the surface area that hot air and circulating air come in contact with increases, so the greater the number of pipes 5, the better the efficiency.

Since a large amount of high-temperature exhaust gas flows into the pipe on the circulation fan 12 side, heat exchange efficiency is extremely good.

In addition, the exhaust gas entering the air collection chamber 6 passes through the flue 8 from the end,
The air flows through the upper exhaust port of the fan device 7 and exits outside the room.

As is clear from the above embodiments, the hot air fan of the present invention has heat exchange pipes attached to the top of the expansion chamber that is laterally larger than the combustion tube, so the exhaust gas is dispersed in the expansion chamber and is effectively distributed to each pipe. The air flows in and has good heat exchange efficiency, and the circulating air also exchanges heat over a wide surface of each pipe, providing comfortable hot air heating.

Further, by arranging the fan device below the expansion chamber, there is no need to increase the overall space, and the device can be made more compact.

Furthermore, since the flow of combustion exhaust gas only flows from the bottom to the top, there is little change in the direction of the flow, which has the effect of reducing the capacity of the fan device.

In addition, this invention provides a guide plate inside the expansion chamber to make it easier for high-temperature exhaust gas to be guided to the pipe near the circulation fan.
The heat exchange efficiency becomes extremely high.

In other words, high-temperature exhaust gas passes through the combustion tube, enters the expansion chamber, spreads laterally, and tries to enter each pipe approximately equally, but in this invention, a guide plate is provided here, so that high-temperature exhaust gas flows into the pipe near the circulation fan. Exhaust gas flows more easily.

Here, the wind speed is high and the temperature is low near the pipe near the circulation fan, so if heat exchange is performed between this and a large amount of high-temperature exhaust gas, the heat exchange efficiency will naturally become extremely high.

In addition, the expansion chamber directly receives the hot air inside the combustion cylinder, and
Since the above-mentioned high-temperature exhaust gas flows, thermal deterioration and thermal deformation are likely to occur, but in the present invention, the above-mentioned guide plate can be effectively used as a reinforcing member, and therefore the above-mentioned thermal deterioration and thermal deformation can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the hot air fan of the present invention, Fig. 2 is a sectional view of the same side, Fig. 3 is a rear view of the hot air fan, Fig. 4 is a perspective view of the fan unit, and Fig. 5 is a perspective view of the fan unit. The figure is a perspective view of the guide plate, Figure 6 is a cross-sectional plan view showing the relationship between the air collection chamber and the flue, Figure 7 is a cross-sectional view of the conventional example, and Figure 8 is an enlarged cross-section of the main part of Figure 2. It is a diagram. 1... Burner case, 3... Combustion tube,
4...Expansion chamber, 5...Pipe, 6...
...Air collection room, 7...Fan device, 8...
... Flue, 10... Case body, 11...
...Air outlet, 12...Circulation fan.

Claims (1)

[Scope of utility model registration request] A combustion tube is provided in the upper part of the burner case, and an expansion chamber that is wider than the combustion tube is provided in the upper part of the combustion tube, and an air collection chamber is provided in the upper part of this expansion chamber via a plurality of pipes. A fan device connected to the air collection chamber by a flue is installed below the air collection chamber, and this fan device and the burner case are connected by a blowing pipe to integrate each of the above components, and to integrate the above-mentioned components. Each of the above-mentioned components is housed in the case body, an air outlet is provided at the front of the case body, a circulation fan is provided at the back, and inside the expansion chamber, the pipe side closer to the circulation fan is placed upward. A hot air fan with a guide board that is as slanted as possible.