JP3216446B2 - 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 hot air heater.

[0002]

2. Description of the Related Art Conventionally, this type of hot air heater is shown in FIGS.
As shown in the figure, the burner base 2 and the duct 3
And a hot air passage 4, and a burner 5
And a combustion section 6 comprising a combustion tube 6 and a convection blower 8 at the rear thereof and an outlet frame 9 at the front thereof. A front plate 11 is attached to the device main body 1. Then, the wind generated by the rotation of the convection blower 8 is sent to the combustion section 7 in front, and the heat generated by the combustion section 7 is obtained to become hot air. It is configured to blow out from the hot air opening 11 to the front of the device main body.

[0003] In the warm air heater having the above-described structure, an upper frame 12, an upper louver 13, and a lower louver 14 are provided on an outlet frame 9, and a combustion tube fitting 15 is provided in front of the combustion tube 6.
Are attached, and the hot air is guided in the blowing direction by these components, and therefore does not directly contact the front plate 11. Therefore, during use of the hot air heater, the temperature rise on the surface of the front plate 11 that may be touched by hands is suppressed low,
Safety is ensured.

[0004] Further, a thermistor 16 for preventing overheating for stopping the combustion of the burner section 5 is attached below the burner section 5 for safety. A sufficient seal area is secured between the wind and the wind. Therefore, the hot air does not leak from between the outlet frame 9 and the burner base 2, and the overheat prevention thermistor does not malfunction.

[0005]

However, in the above-mentioned conventional structure, the air outlet frame 9 is similarly increased so as to increase the blown air amount so that the hot air temperature does not excessively increase when the combustion amount of the equipment is increased in calories. When trying to increase the opening area,
As shown in FIG. 3, it becomes necessary to abolish the combustion tube fitting 15 and to flow hot air also to the lower portion of the lower louver 14. In this case, unless the outlet lower metal fitting 16 is added to guide the flow of the warm air, the warm air comes into direct contact with the front plate 11. Further, since the combustion tube fitting 15 is abolished, a sufficient sealing area cannot be secured between the outlet frame 9 and the burner base 2, and it is necessary to add a sealing material 18 to prevent hot air leakage, resulting in an increase in cost. Had the problem of doing so.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and by improving the shape of the outlet frame, it is possible to increase the amount of air blow without increasing the front plate temperature, and to provide a cost-effective hot air heater. It is intended to do so.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a hot air passage formed by a burner base and a duct in an apparatus body, a combustion section provided in the hot air passage, and a hot air passage. A convection blower for supplying warm air into the wind passage;
An outlet frame provided at an outlet portion of the hot air passage, and a front plate attached to the main body of the apparatus with the outlet for the hot air aligned with the outlet frame, and the lower portion of the outlet frame has a staircase. In this configuration, the opening area of the outlet portion is enlarged and the inner peripheral flange portion is overlapped on the upper surface of the burner base.

[0008]

According to the present invention, the flange portion of the outlet frame prevents the hot air from leaking, and the presence of the step-like portion enlarges the opening area of the blowout portion to increase the amount of hot air blown. Is less likely to touch the hot air opening of the front plate. Therefore, it is possible to provide a warm air heater excellent in both blowing performance and cost performance while suppressing malfunction due to warm air and a rise in temperature of the front plate without adding a seal part or the like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 1. The same parts as those in the prior art will be denoted by the same reference numerals, and description thereof will be omitted. The outlet frame 20 is mounted on the duct 3, and the lower portion of the frame portion is formed in a stepped shape 20a so that the opening area of the outlet portion is larger than in the past. The inner peripheral flange 20 of the stepped outlet frame 20
b is superposed on the upper surface of the burner base 2.

Therefore, according to such a configuration, the opening of the blow-out portion for the hot-air supply in the blow-out port frame 20 is greatly expanded downward, so that the warm air is blown out from below the lower louver 14 as well. Can be secured more. Therefore, it is possible to set the calorie of combustion generated in the burner section 7 to be high, so that even if the calorie of combustion is set to be high, the warm air temperature can be kept at an appropriate temperature and comfortable heating can be performed.

On the other hand, since the outlet frame 20 has a stepped throttle shape, it is possible to guide the hot air out of the front plate 11 so as not to touch the front plate 11 and blow it out. Temperature rise can be suppressed. In addition, inside the outlet frame 20, the flange portion 20b overlaps with the burner base 2 to secure a sealing area between the burner base 2 and the hot air leak is reliably prevented without adding an extra sealing material or the like. can do.

[0012]

As is clear from the above description of the embodiment, according to the present invention, the front plate is formed while a large amount of warm air is secured by forming the outlet frame in a step shape and overlapping the flange portion with the burner base. The temperature of the hot air can be kept low and the hot air can be prevented from leaking into the equipment body without adding a sealing material, etc. It is possible to provide a hot air heater excellent in both properties.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a hot air heater in one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the overall configuration of the present invention and a conventional hot air heater.

FIG. 3 is a sectional view of a main part of a conventional hot air heater.

FIG. 4 is a sectional view of a main part of another conventional hot air heater.

[Explanation of symbols]

 2 Burner base 3 Duct 4 Hot air passage 7 Burning part 10 Opening for hot air blowing 11 Front plate 20 Outlet frame 20a Stepped portion 20b Flange

Claims (1)

(57) [Claims] 1. A hot air passage formed in a main body of a device with a burner base and a duct, a combustion section provided in the hot air passage, and a convection blower for supplying hot air to the hot air passage. An outlet frame provided at an outlet portion of the hot air passage, and a front plate attached to the device body with the outlet for the hot air being matched with the outlet frame, and the outlet frame is provided at a lower portion thereof. Are formed in a step-like manner to enlarge the opening area of the blow-out portion, and the inner peripheral flange portion is overlapped on the upper surface of the burner base.