JP2553501Y2 - Combustion 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 combustion heater for discharging exhaust gas after combustion into a room from a front surface of a main body using a convection blower.

[0002]

2. Description of the Related Art In a conventional combustion hot air heater of this type, a burner is installed in a lower portion of an inner duct that constitutes a combustion chamber, and a burner is provided at a front portion of the inner duct to check a flame in a flame hole of the burner. A viewing window made of a transparent member such as glass or mica is provided in a part, or a plurality of slit holes are vertically arranged in parallel, and a means for directly viewing the flame through the slit holes is employed. (For example, Japanese Utility Model Application Laid-Open No.
No., Japanese Utility Model Laid-Open No. 59-195448)

[0003]

In the above-described combustion hot air heater, when a flame is formed on the burner in the combustion chamber, the fuel causes an oxidation reaction to generate exhaust gas. Contains carbonaceous components, and when the combustion balance deteriorates, soot is generated and burned. Therefore, the glass of the view window provided for checking the burner flame in the inner duct also has black soot, which makes it difficult to check the flame inside the inner duct from the front of the body. Also, when the amount of combustion is large or the view window of the inner duct is close to the burner, the view window keeps receiving the heat of the flame strongly, so expensive glass with good heat resistance must be used for the view window,
As a result, inexpensive home-use hot-air heaters increase the product price.

Therefore, mica may be used for the view window. However, the mica loses its transparency due to heat and becomes white, making it difficult to confirm the state of the flame.

[0005] When a viewing window with a plurality of slit holes is provided on the front surface of the inner duct, the exhaust gas inside the inner duct may escape from the slit holes and the flame may overflow together. In addition, since the heat capacity of the part forming the slit hole is extremely small in shape compared to the surface of the inner duct with the view window, the part is deformed or torn by hot air or flame. There is a problem that overflows outside the duct. Also, due to its structure, the viewing window of the inner duct is near the hot air outlet, so the temperature of the outlet increases,
It could be a very dangerous problem.

[0006]

The present invention does not use expensive heat-resistant glass, mica, etc., but arranges a plurality of viewing windows consisting of a plurality of vertically long slit holes on the front surface of the inner duct. A wind guide plate is provided substantially vertically so as to be in contact with all the members between the slit holes on the side surface and to straddle the viewing window.

[0007]

With the above structure, the wind from the convection blower flowing to the outside of the inner duct acts on the wind guide plate to increase the pressure outside the inner duct from the inside, thereby increasing the pressure increased by combustion inside the inner duct. Is prevented from leaking from the slit hole to the outside, and safe combustion is performed.

In addition, since the wind guide plate is in close contact with the portion of the slit hole, the heat capacity of the roll is increased due to the heat radiation effect of the wind guide plate, and the heat line is not broken by a flame or hot air, and is good in terms of life. Results.

Further, since the wind guide plate is provided substantially vertically on the outer front surface of the inner duct, even if the burner flame holes and the flame are viewed from the hot air outlet on the front surface of the main body, visibility due to the presence of the wind guide plate is not impaired.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

In the drawing, reference numeral 4 denotes a fuel tank for supplying kerosene,
Reference numeral 5 denotes an oil pan for storing oil supplied from the oil tank 4. A pump 6 is mounted on the oil pan 5.

Reference numeral 1 denotes a vaporizer for vaporizing kerosene, which is in communication with a pump 6. Reference numeral 2 denotes a nozzle for ejecting a vaporized gas, which is provided in the vaporizer 1. Reference numeral 3 denotes a burner, and the nozzle 2 of the vaporizer 1
The primary gas is sucked and mixed with the vaporized gas, blows out from the flame hole portion 3a provided thereabove, and is mixed with the secondary air to continue the combustion. Reference numeral 7 denotes a burner base provided with a hole 7a for taking in primary and secondary air for combustion at a lower portion on the back side, a burner 3 fixed at an upper portion, and a plurality of holes for sending the secondary air around the burner 3 in a well-balanced manner. Small hole 7b
Is provided. Reference numeral 8 denotes a main body of the hot air heater, 9 denotes a convection blower mounted on the back surface, 10 denotes an inner duct, which is provided on the upper surface of the burner base 7 so as to surround the burner 3, and has an exhaust port 10a provided on the upper front surface. ing.

On the front surface of the inner duct 10, a plurality of vertically elongated slit holes 10b are juxtaposed so that the flame holes 3a and the flame 3b of the burner 3 can be seen through the louver 8a on the front surface of the main body 8, thereby forming a viewing window 10c. doing. Reference numeral 11 denotes a wind guide plate which is substantially perpendicular to the front outer surface of the inner duct 10 so as to come into contact with the ridges 10d of all the slit holes 10b, straddle the viewing window 10c, and divide the viewing window 10c into two approximately vertically. . The wind guide plate 11 is provided at a position where the visible line 12 of the flame hole 3a and the flame 3b does not obstruct the louver 8a from the front surface of the main body 8.

Reference numeral 13 denotes a substantially rectangular cylindrical outer duct, and the inner duct 1
0 is open at the lower part on the front side and the back side.
A space is maintained between the left and right sides and the upper surface of the burner base 7, and the lower portion is fixed to the upper surface of the burner base 7 together with the lower portion of the inner duct 10, and the back surface is fixed to the inside of the back surface of the main body 8.

The movement of the wind in the blowing path during combustion in the above-described structure will be described.

The air from the convection blower 9 is supplied to the inner duct 10.
The air dispersed there passes between the left and right sides of the outer duct 13 and the inner duct 10 and the upper surface, and the inner duct 1
0 Along with the heat exhaust 3c from the upper exhaust port 10b, it reaches the front side of the inner duct 10 and becomes hot air 8b which is discharged from the louver 8a on the front surface of the main body 8, and the other passes through the holes 7a and small holes 7b of the burner base 7. Thus, the primary and secondary air 7c for combustion of the burner 3 is obtained. Further, the air-fuel mixture discharged from the flame hole 3a of the burner 3 in the inner duct 10 obtains secondary air from the hole 7a of the burner base 7 and burns, so that the air-fuel mixture has a higher pressure than in non-combustion. The process is completed by the exhaust port 10a of the duct 10, and is discharged as heat exhaust 3c from the exhaust port 10a and continuously burns.

On the other hand, a viewing window 10 is provided on the front side of the inner duct 10.
Since c is open, the flame 3b inside the inner duct 10 tries to escape from the view window 10c to escape from high pressure to low pressure. However, since the wind pressure of the hot air flowing through the space between the inner duct 10 and the outer duct 13 is higher than the combustion pressure inside the inner duct 10, the wind pressure flowing around the inner duct 10 is reduced by a viewing window in front of the inner duct 10. It is collected by the wind guide plate 11 of the inner duct 10, so that the view window 10 c of the inner duct 10 is obtained.
Is slightly higher in pressure than the inside, the air is slightly pushed into the inside of the inner duct 10 by the wind guide plate 11, and the flame 3b is directed toward the upper exhaust port 10a to complete the combustion.

With these wind movements, the flame hole 3a and the flame 3b of the burner 3 inside the inner duct 10 pass through the louver 8a on the front of the main body 8 and the upper part of the view window 10c which is vertically divided by the wind guide plate 11. You can look straight ahead.

[0019]

According to the present invention, as described above, the wind mixed with the exhaust gas passes through the upper portion of the inner duct and acts on the viewing window by the wind guide plate, and the pressure of the viewing window is reduced from the inside of the inner duct. By increasing the height, the flame can be suppressed into the inner duct, and a safe hot air heater can be provided.

Further, since the sight window is an aggregate of slit holes, the flame holes and the flame of the burner in the inner duct can be directly viewed through the louver of the main body, so that the sight window is discolored by the carbon-based compound in the exhaust gas. It is possible to provide a hot air heater that is convenient for checking at the time of ignition or an abnormal combustion state without deterioration in performance. Further, it is possible to provide an inexpensive product because glass, mica, or the like, which can cause the discoloration, is not used. Furthermore, by providing a wind guide plate that contacts all the gaps between the slit holes on the front side of the inner duct and straddles the viewing window, the heat capacity of the slit holes is increased, and even when burning with a high calorific value. Can be prevented from being deformed or torn.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention after an outer duct and an inner duct are assembled.

FIG. 2 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 3 is a combustion system diagram showing an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 burner 8 body 9 convection blower 10 inner duct 10b slit hole 10c view window 11 wind guide plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A burner (3) installed in a main body (8).
An inner duct (10) is installed at the top of the
0), an exhaust port (10a) is provided in the upper part of the front surface, and a convection blower (9) is provided on the back surface of the main body (8), and the exhaust gas after burning by the burner (3) is supplied to the blower (9). The air is discharged as warm air through the louver (8a) on the front surface of the main body (8) together with the wind.
A viewing window (10c) composed of a plurality of vertically elongated slit holes (10b) is juxtaposed on the front surface of the device, and the viewing window (10c) is provided.
On the outer surface of the all holes (10b) between the slit holes (10b).
A combustion hot air heater comprising a wind guide plate (11) provided substantially vertically so as to come into contact with d) and straddle the viewing window (10c).