JPS6241153Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a bottom-blowing hot air heating device.

Many conventional hot air heaters that blow hot air from a lower part of the fuselage have a structure as shown in FIG. That is, the fuel tank 10
1 at the bottom of the fuselage, a combustion device and heat exchange section 102 at the middle stage, and a convection blower 103 at the upper stage, and air from the convection blower 103 is blown downward toward the heat exchange section 102. There is. Since the fuel tank 101 is close to the combustion device, an inlet 106 is opened near the discharge port of the convection blower 103 for the fuel refill port 105 where it is difficult to adopt a heat insulating structure. A portion of the airflow from the convection blower 103 is brought into contact with the cooling air duct 107 whose outlet end is open toward the air flow. However, in the past, the cooling air duct 107 passes near the heat exchanger 102 and extends to the vicinity of the convection blower 103, and its structure is a simple air passage as shown in the figure, so the inlet port There were problems such as air flow hitting the 106 and making noise.

The object of the present invention is to provide a hot air heating device that can solve the above-mentioned conventional problems.

Next, the configuration of the present invention will be specifically explained based on an embodiment shown in the drawings.

The hot air heater as an application example of the present invention shown in FIG. 2 is of a bottom blowing type that blows out hot air from the lower front of the body. However, an assembly of a combustion device 3 and a heat exchanger 4 is disposed in the middle stage, and a convection blower 5 is disposed in the upper stage. In the lower fuel tank 2, a fuel supply port 6 is located on the side surface of the main body casing 1, and a tank cap 7 is removably attached to the fuel supply port 6. Directly above the fuel tank 2 is a separate plate 8 that divides the inside of the main casing 1 into upper and lower parts, and the combustion device 3 is assembled onto this separate plate 8. The heat exchange section 4 is an assembly of a combustion tube 9 and a heat exchanger 10, and the combustion tube 9 is connected to the combustion device 3 at one end, the other end to the header 11 of the heat exchanger 10, and has a main body. It is disposed laterally within the casing 1. The heat exchanger 10 is assembled directly above and substantially parallel to the combustion tube 9 through its header 11, and has an exhaust pipe 12 connected to its end. The heat exchange section 4 having such a configuration is assembled in such a manner that it almost crosses the ventilation path S related to the air flow formed by the convection blower 5.
heat exchange between the air flow and the combustion gas. The convection blower 5 that forms a flow of air, which is the fluid to be heated, takes in indoor air and blows it out into the room again from a hot air outlet 13 . It has an opening facing downward into the inner wall. A duct member having a substantially channel-shaped cross section is attached to the inner wall of the main body casing 1 facing the discharge port 14 of the convection blower 5, and serves as a cooling air duct for guiding cooling air to cool the tank cap portion of the fuel tank 2. 1
5 is formed. An inlet 16 which is an air intake of the cooling air duct 15 opens upward at a position substantially corresponding to the upper end of a flat part facing the inner wall of the main body casing 1 of the header 11, and an outlet end 17 is formed by a separate plate. 8 and opens directly above the tank cap 7. In addition, 11A
indicates the oblique portion of the header 11.

Therefore, a part of the air flow of the convection blower 5 is
Before reaching the heat exchange section 3, a portion of the heat is guided by the guide plate 18 and taken into the cooling air duct 15, where it is supplied to the tank cap for cooling. Of course, hot air for heating,
It is formed by heat exchange in the heat exchange section 4 like a normal hot air heating device, and is blown into the room from the hot air outlet 13. The air flow for cooling the tank cap part is part of the air flow formed by the convection blower 5, but since it is not blown directly into the inlet 16, noise such as wind noise is generated when the air is introduced. There is no noise, and the operating noise is low.

In addition, the code|symbol 19 in the figure shows a humidifying dish.

As is clear from the above description of the embodiments, the hot air heating device of the present invention has a cooling fan duct with an inlet port that guides the air flow for cooling the fuel tank.
Since the guide member is installed diagonally to guide the introduction of the airflow of the convection blower, there is little noise associated with the intake of cooling air, and there is almost no heating of the air used for cooling. .

[Brief explanation of drawings]

Fig. 1 is a front view showing the configuration of a conventional hot air heating device with the front structure removed, and Fig. 2 shows a hot air heating device as an application example of the present invention in a form similar to that shown in Fig. 1. The front view shown in FIG. 3 is a plan sectional view of the main part showing the configuration of the inlet portion of the cooling air duct. Note that the same reference numerals in the figures indicate the same or equivalent parts. 2...Fuel tank, 4...Heat exchange section, 5...Convection blower, 6...Fuel supply port, 7...Tank cap, 10...Heat exchanger, 11...Header, 1
4...Discharge port, 15...Cooling air duct, 16...
...Inlet, 17...Outlet end, 18...Guidance plate.

Claims (1)

[Scope of utility model registration request] A convection blower is installed above the heat exchanger that blows air toward the heat exchanger, and a fuel tank is installed below the heat exchanger. The air flow from the convection blower is divided and a part of the air flow is supplied to a tank cap portion attached to the fuel supply port of the fuel tank, and air is provided at a position approximately corresponding to the upper edge of the heat exchanger. A cooling air duct with an air flow inlet is provided, and the air flow of the convection blower is divided into the heat exchanger side and the air inlet side, and a part of the air flow is divided into the heat exchanger side and the air inlet side. This hot air heating device has a configuration in which a guide member that guides the inlet is extended obliquely toward the outlet side of the convection blower.