JP2599052B2 - Hot air blower body cooling device - 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 blower which performs heating and drying operations by blowing out hot air, and more particularly, to a main body cooling device for a hot air blower which prevents the main body components from being heated.

[0002]

2. Description of the Related Art Conventionally, as a hot air blower which injects hot air to effect heating and drying, those disclosed in Japanese Utility Model Laid-Open No. 51-3942 and Japanese Utility Model Laid-Open No. 54-169944 are known. The former arranges a fuel injection hole at the rear of a combustion chamber formed of a conical cylinder that opens greatly forward, provides a ventilation glow plate at the front of the combustion chamber, and arranges a blower behind the cylinder. This is a liquid fuel combustion type infrared heater configured to discharge an airflow generated by a blower forward through a passage between an outer casing and a cylindrical body. The latter is provided with an infrared heater having a heat radiation surface facing forward, and a motor-driven fan having an air outlet having a width substantially the same as the width of the heat radiation surface at the front, and this fan is located behind the infrared heater. It is a heating device attached to the upper part.

[0003]

By the way, Japanese Utility Model Application Laid-Open No. Sho 51-3942 or Japanese Utility Model Application Laid-Open No. Sho 54-16994.
In the prior art described in Japanese Patent Application Publication No. 4 (1999) -1995, there is no cooling means for the main body portion that supports the combustion chamber, and there is a possibility that the components may be deteriorated due to overheating of the main body portion. In addition, the latter 54-1
In the prior art described in Japanese Patent Application Laid-Open No. 69944, since the fan is mounted on the upper rear portion of the infrared heater, there is a problem that the overall height increases and the device becomes larger.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cooling device for a hot air blower which can effectively cool its main body without increasing the overall height of the hot air blower and can also improve the inherent thermal efficiency of the hot air blower.

[0005]

SUMMARY OF THE INVENTION For this purpose, a cooling device for a main body of a hot air blower according to the present invention comprises a heat blower 1 having a heat dissipation disk 4 at a front opening and a combustion chamber 2 for radiating heat forward. The hot air blower 1 is disposed behind the combustion chamber 2.
A circulator 12 is provided in the main body, and suction air is introduced toward the intake port 13a of the circulator 12 from a number of suction holes 3c provided in the outer peripheral portion of the front surface of the combustion chamber 2 so as to pass through the inside of the main body of the hot air blower 1. The means is provided with a guard 14 and a duct 15 for guiding the discharge air from the discharge port 13b of the circulator 12 to a position above the combustion chamber 2 and jetting the discharge air forward by a predetermined width to form an air curtain.

[0006]

By adopting such a means, the air sucked from the large number of suction holes 3c along with the operation of the circulator 12 passes through the inside of the main body of the hot air blower 1 by the suction guard 14, and is sucked into the circulator 12. The air is guided to the opening 13a, and at this time, the inside of the main body of the hot air blower 1 is cooled by the intake air.

Further, the air discharged from the circulator 12 is guided to a position above the combustion chamber 1 through the duct 15 and is jetted forward from the position with a predetermined width to form an air curtain. Heat is prevented from escaping upward, and the heating efficiency of the hot air blower 1 is improved.

Here, since the circulator 12 is disposed behind the combustion chamber 2, the overall height of the hot air blower 1 does not increase, and the circulator 12 discharges air through the duct 15, so that pressure loss is small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. Hot air blower 1 shown in FIGS. 1 and 2
Has a bowl-shaped combustion chamber 2 whose front is open in a horizontally long elliptical shape and is accommodated in a main body case 3, and a large number of narrow holes are provided in the front opening of the combustion chamber 2 facing the front opening 3 a of the main body case 3. A heat radiating disk 4 having holes is mounted. Further, a grid-like safety guard 5 supported on the peripheral edge 3b of the front opening of the main body case 3 is located in front of the heat radiating disk 4 to prevent accidental contact with the heat radiating disk 4.

The main body case 3 has a large number of suction holes 3c on the front surface and lower rear surface thereof, and is mounted on a support plate 7 which covers the upper surface of the fuel tank 6. The front and rear edges of the support plate 7 are fixed to the upper and lower pipe frames 8 and 9 together with the flange 6a of the fuel tank 6 by being sandwiched therebetween. A leg 9a is formed in the lower pipe frame 9 and a pair of wheels 10, 10 are rotatably supported via an axle 11, and these leg 9a and wheels 10, 1
At 0, the main body case 3 is supported at a predetermined height together with the fuel tank 6.

A circulator case 13 containing a circulator 12 is fixed to the rear surface of the main body case 3 behind the combustion chamber 2. The circulator case 13 has a suction port 13a opening diagonally downward toward the rear side of the main body case 3, and a discharge port 13b opening diagonally upward toward the rear side of the main body case 3. Therefore, a suction guard 14 is stretched between the circulator case 13 and the rear surface of the main body case 3 so as to cover the suction port 13a of the circulator case 13 and the suction port 3f opened on the rear surface of the main body case 3.

On the other hand, a rear end of the duct 15 is connected to the discharge port 13b of the circulator case 13.
The duct 15 extends obliquely upward and forward through the rear surface of the main body case 3, and its front end faces above the combustion chamber 2 inside the main body case 3. Also body case 3
In the upper front surface of the nozzle, there are a large number of ejection holes 3d in the width direction.
The opening of the front end of the duct 15 is formed in a horizontally long shape corresponding to this. A louver 3e is formed in each of the plurality of ejection holes 3d so as to slightly deflect the discharge air discharged through the duct 15 obliquely downward.

In the hot air blower 1 configured as described above, the combustion flame and the combustion gas are filled in the combustion chamber 2 in a certain operation procedure by turning on an operation switch (not shown). Flows forward through the pores. Then, when a certain time has elapsed, the circulator 12 operates.

With the operation of the circulator 12, external air is drawn into the main body case 3 from a number of suction holes 3 c provided in the main body case 3, and the suction air is directed toward the suction port 13 a of the circulator case 13. By passing through the inside of the case 3, the inside of the main body case 3 is cooled, and the components are prevented from being heated.

The discharge air discharged from the discharge port 13b of the circulator case 13 through the duct 15 is:
Since the air curtain is ejected obliquely downward and forward from the ejection hole 3d having the louver 3e to form a horizontally expanding air curtain, the rise of the combustion gas flowing forward from the pores of the heat dissipation disk 4 is suppressed. That is, upward diffusion of the heat from the heat radiating disk 4 is prevented, and the effect of heating and drying the object to be heated disposed in front is increased, and the heating efficiency of the hot air blower 1 is improved.

Since the circulator case 13 containing the circulator 12 is arranged on the rear surface of the main body case 3 behind the combustion chamber 2, the overall height of the hot air blower 1 does not increase, and a compact configuration can be maintained. Since the circulator 12 discharges air through the duct 15,
Low pressure loss and good efficiency.

[0017]

As described above, according to the present invention, in accordance with the operation of the circulator 12, the suction air from the many suction holes 3c passes through the inside of the main body of the hot air blower 1 by the suction guard 14, and the circulator 12 It is led to the inlet 13a. Therefore, the inside of the main body of the hot air blower 1 can be cooled by the intake air from the many intake holes 3c, and the cooling effect is improved.

The air discharged from the circulator 12 is guided to a position above the combustion chamber 1 through a duct 15, and is jetted forward from the position by a predetermined width to form an air curtain. Therefore, heat can be prevented from escaping upward from the front of the heat radiating disk 4 by the air curtain, the heating efficiency of the hot air blower 1 can be improved, the amount of cooling air can be reduced, and the cooling fan can be downsized.

Here, since the circulator 12 is disposed behind the combustion chamber 1, the overall height of the hot air blower 1 does not increase, and since the circulator 12 discharges air through the duct 15, the pressure loss is small. The noise of the cooling fan hardly comes out to the outside, and the effect of reducing noise can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line II of FIG. 2 showing a hot air blower to which an embodiment of the present invention is applied.

FIG. 2 is a front view of a hot air blower to which one embodiment is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot air blower 2 Combustion chamber 3 Main body case 3a Front opening 3b Front opening peripheral edge 3c Suction hole 3d Spout hole 3e Louver 3f Suction port 4 Heat dissipation disk 5 Safety guard 6 Fuel tank 6a Flange part 7 Support plate 8 Pipe frame 9 Pipe frame 9a leg 10 wheel 11 axle 12 circulator 13 circulator case 13a suction port 13b discharge port 14 suction guard 15 duct

Claims (1)

(57) [Claims] 1. A hot air blower (1) having a heat-dissipating disk (4) at a front opening and a combustion chamber (2) radiating heat forward.
, A circulator (12) is provided on the main body of the hot air blower (1) disposed rearward from the combustion chamber (2) , and the combustion chamber is directed toward the suction port (13a) of the circulator (12).
(2) a suction guard (14) for guiding suction air from a number of suction holes (3c) provided in the outer peripheral portion of the front surface to pass through the inside of the main body of the hot air blower (1) , and a circulator (12) . A hot air blower provided with a duct (15) for guiding discharge air from the discharge port (13b) to a position above the combustion chamber (2) , and ejecting the discharge air forward with a predetermined width to form an air curtain. Body cooling device.