JPS63108153A - Hot air heater - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot air heater for general household use, which burns oil and blows the combustion gas into a room for heating.

Conventional technology The indoor open type warm air heater consists of a burner section that vaporizes and burns fuel, and a combustion tube that guides the combustion gas.
It is composed of an air blower and an outlet provided opposite to the combustion tube, and the air from the blower and the combustion gas discharged from the combustion tube are mixed and hot air is blown from the outlet to heat the room. It is something.

Hereinafter, an example of the above-mentioned conventional warm air heater will be described with reference to the drawings.

6 to 8 are sectional views of the main parts of a conventional hot air heater, and FIG. 9 is a cross sectional view. 1 has a cylindrical shape with a bottom,
It is a carburetor cylinder with a built-in sheath engine 2 in its upper part, and a nozzle/I/3 for ejecting fuel and a throat 4 for ejecting air are opened on the side at the same position. The nozzle/L/3 is connected to an oil supply equipment (not shown) through an oil feed vibrator 5, and the throat 4 is connected to an air blower through an air supply hose 6. Reference numeral 7 denotes a vaporizer lid which is placed on the upper part of the vaporizer cylinder 1 and has an opening in the center.The vaporizer cylinder lid 7 is placed on the upper part of the vaporizer cylinder 1 and is opened at the center. installed on. A heat recovery ring 9 is attached to the upper outer periphery of the vaporizing cylinder 1 so as to face the flame opening of the flame stabilizing plate 8. The outer periphery of the vaporizing cylinder 1 is covered with a burner case 1o having an open upper part.
A cylindrical combustion tube 11 is placed on the upper part of the combustion tube, the lower end of which is connected to the burner case 1o, and a combustion tube lid 12 with a center opening is attached to the upper end opening. An oxidation catalyst 13 is attached to the central opening.

Further, the combustion tube 11 has a plurality of air intake holes 16 for introducing air sent by the propeller 7 ann 15 of the convection blower 14 from the outlet side to be described later on the lower circumferential surface of the combustion tube 11. The combustion tube 11 and the duct bottom 19a form a passage so as to cover the combustion tube 11, and a horse-shaped combustion tube duct 17 with an open side facing the convection blower 14 is provided on the front half side of the combustion tube 11. In front of the combustion tube 11,
An air outlet is provided facing the convection blower 14, and the air sent from the convection blower is transferred to the combustion tube 11 and the duct 19.
Warm air is blown outside through the

The operation of the warm air fan configured as above will be described below.

Fuel sent from the refueling device is injected into the carburetor tube 1 from the nozzle 3 via the oil feed pipe, and combustion air sent from the blower device is sent from the throat 4 to the vaporizer tube 1 via the air supply hose.
It is squirted inside. On the other hand, the vaporization cylinder 1 is preheated to a high temperature by an internal sheathed heater 2, and the ejected fuel is instantaneously vaporized in the vaporization cylinder 1 and mixed with the combustion air ejected from the throat 4, The gas passes through the central opening of the vaporizer lid 7 and is ejected from the flame port of the flame holding plate 8. The ejected mixed gas is ignited by ignition means such as high-voltage spark discharge provided near the flame-holding plate 8 to form a flame and perform combustion. Further, the combustion flame becomes a safe combustion flame by supplying air from the convection blower 15 into the combustion tube 11 through the combustion tube duct 17 and through the air intake hole 16 provided in the combustion tube 11. The combustion tube 11 is heated by the combustion heat generated by the combustion flame C, and the combustion gas is discharged to the outside of the combustion tube 11 through the oxidation catalyst 13 in the upper part of the combustion tube. This heated combustion tube 1
1 undergoes heat exchange with the air sent from the convection blower 14, mixes with the combustion gas, and is discharged into the room as warm air from the outlet 18, heating the room.

Problems to be Solved by the Invention A combustion flame is formed by the mixed gas ejected from the flame opening of the flame holding plate 8. Conventionally, since the air-fuel ratio of this mixed gas is low, the insufficient combustion air is used by a convection blower. It must be replenished by etc. For this purpose, an air intake hole 16 is provided at the bottom of the combustion tube 11, and a convection blower 1 is provided through the combustion tube duct 17.
5 introduces an appropriate amount of air into the combustion tube 11.

However, if the distribution of the amount of air taken into the combustion tube 11 is not made uniform in the inward direction, 1,73 flame fluctuations will occur, and exhaust gas performance will deteriorate due to local excess or deficiency of air amount ( (emission of Co, soot, etc.).

In addition, in areas where there is insufficient air, the flame will extend for a long time.
The external flame comes into contact with the combustion tube, causing the temperature of the combustion tube to rise locally, causing problems with heat resistance. Therefore, it is necessary to introduce air uniformly in the circumferential direction within the combustion tube 11 and not disturb the combustion flame. However, in the conventional configuration, the shape of the combustion tube duct 17 is a horse-shaped symmetrical shape as shown in FIG. The distribution of the amount of air introduced into the combustion tube 11 from the convection blower 14 was uneven, and the combustion flame 8a was also biased to one side as shown in FIG. 9, which had an adverse effect on combustion.

Furthermore, since the combustion tube duct 17 is bilaterally symmetrical and the convection blower 14 is a propeller fan 15, the amount of air introduced into the combustion tube 11 is uneven.
The amount of air released from the air outlet 18 to the outside is also affected by the combustion tube 11.
This has the disadvantage that the hot air temperature and volume of hot air are not uniform, and comfortable hot air performance cannot be obtained.

In view of the above-mentioned problems, the present invention aims to improve exhaust gas performance by uniformly introducing air from a convection blower into the combustion cylinder to uniformly turn the ash and dawn flames into complete combustion flames, and to improve exhaust gas performance.
The purpose is to avoid local temperature increases in the combustion tube, improve durability, and obtain comfortable hot air performance.

Means for Solving the Problems In order to solve the above-mentioned problems, the hot air heater of the present invention has a combustion tube duct that introduces air into the combustion tube, which has an asymmetrical shape. .

Effect of the Invention The present invention has the configuration described above, and the shape of the combustion tube duct is made bilaterally symmetrical through the combustion tube, and the amount of air introduced from the convection blower of the propeller fan into the combustion tube is made uniform. To improve exhaust gas performance by turning the combustion flame into a stable, unbiased, complete combustion flame. It also prevents overheating of the combustion tube due to local elongation of the combustion flame and improves the heat resistance of the combustion tube. Furthermore, by configuring the combustion tube duct in a left-right asymmetrical configuration, it is possible to equalize the amount of air introduced into the combustion tube left and right as described above, and at the same time to equalize the amount of remaining air from the convection blower. Also, the warm air discharged from the outlet to the outside can provide a comfortable warm air quality with well-balanced temperature uniformity.

EXAMPLE Hereinafter, a hot air heater according to an example of the present invention will be described with reference to the drawings. Fig. 1 is a sectional view of each essential part in an embodiment of the present invention, Figs. 2 and 3 are overall sectional views, Fig. 4 is a cross-sectional view, and Figs. 5 (a) and (b) are sectional views of the present invention. FIG. 2 is a side view and a plan view of a combustion tube duct. The present invention will be described in detail below with reference to FIGS. 1 to 5. Combustion tube duct F in the diagram
The configuration of each part except for 17a and 17b is the same as described in the conventional example, so the same reference numerals as in the conventional example are given and detailed explanation is omitted here. Combustion cylinder duct 17a, 1 of the present invention
7b is from the front (from Suita Exit 18 side) l'1lli7
For the sake of explanation, the right side is divided into the right combustion tube duct 17a1 and the left side is the left combustion tube duct 17b, but they are integral parts in the shape of a horse. The right combustion tube duct 17a is longer than the left combustion tube duct 17b, as shown in FIG. 4', and is located closer to the propeller fan 15 of the convection blower 14 at the rear. This is because the propeller fan 150 rotational power rotates counterclockwise when facing from the front, and if the propeller fan 1S rotates clockwise on the contrary, the combustion tube duct right 17a is closer to the combustion tube duct left 17b. The structure is such that the propeller 7 is located further away from the propeller 7 of the convection blower 14 at the rear.

With the above configuration, the combustion flame formed at the flame port of the side opening of the flame stabilizing plate 8 directs the air from the convection blower 14 to the combustion tube duct right 17a, the combustion tube duct left 17b, and the lower half of the combustion tube 11. A complete combustion flame is created by introducing the air into the combustion tube 11 through the air intake hole 16 provided on the side surface. Combustion heat generated by this combustion flame heats the combustion tube 11, and combustion gas passes through the oxidation catalyst 13 inside the combustion tube 11 and is discharged into the duct 19. The heated combustion chamber 11 exchanges heat with the air sent from the convection blower 14, and at the same time is mixed with combustion gas and discharged into the room as warm air from the outlet to heat the room.

As described above, according to this embodiment, when the rotation direction of the propeller fan 15 is counterclockwise when rotating from the front, the combustion cylinder duct right 17a is connected to the combustion cylinder duct left 17b by convection. By installing the air blower 14 in a position close to the air blower 14, the amount of air introduced from the right side 17a1 and the left side 17b of the combustion tube duct is equalized, and the combustion flame 8c formed at the flame opening of the flame stabilizing plate 8 is also uniform as shown in Fig. 4. There is no wobbling around the entire circumference, resulting in a complete combustion flame. Therefore, a constant amount of stable air is supplied to the flame stabilizing plate 80 in the circumferential direction, with no excess or deficiency, so combustion exhaust gas performance is improved, and the combustion flame is elongated as in the conventional example, causing local Problems such as discoloration of the combustion tube 11 due to overheating of the combustion tube 11 and durability problems can also be solved.

At the same time, by equally distributing the amount of air introduced from the right side 17a1 and left side 17b of the combustion cylinder duct, the left and right force of the remaining air amount from the convection feeder can also be achieved, and the air outlet 18 Even the warm air discharged outside can provide comfortable warm air performance with a balance between the left and right sides and no temperature unevenness.

More than just the effects of the invention, the non-invention is that by making the shape of the combustion pipe duct asymmetrical, combustion and waste air can be uniformly introduced into the combustion pipe, which improves exhaust gas performance. The durability of the combustion tube can be improved.

In addition, the hot air discharged outside from the air outlet can provide comfortable hot air performance with a balanced left-right temperature and no temperature unevenness through the combustion tube.

[Brief explanation of the drawing]

Figures 1 to 3 are sectional views of the main parts of an embodiment of the hot-air heater of the present invention, Figure 4 is a cross-sectional view of the same, and Figures 5 (a) and (b) are sectional views of the same hot air heater. Side view and plan view of the duct, Figures 6 to 8
The figure is a sectional view of each main part of the conventional example, and FIG. 9 is a lateral 1fT view of the same. 1... Vaporizing cylinder, 8... Flame holding plate, 11.
... Combustion tube, 14 ... Convection blower, 15
... Propeller 7 Ann, 16 ... Air intake hole,
17a... Combustion cylinder duct right, 17b...
Left side of fuel/akatsuki duct, 18... air outlet. /-11 vaporization simple a ---I 禾喑' anti//-1-v-full bay ff-m-Gas light angle 14- Inch claw feeder-Fukyo 15- Propeller fan 16- Air J length Entrance/exit hole/7a-11 blade π, face guguto figure 2/'? Figure 5 (A) G Figure 6/q Figure 7/q

Claims (2)

[Claims] (1) A burner section consisting of a vaporization tube that thermally vaporizes liquid fuel and a flame-holding plate that burns the vaporized gas, and a cylindrical structure provided above the burner section so as to cover the burner section, and secondary combustion on the lower peripheral surface. a combustion tube having a plurality of air intake holes for taking in air for use in the combustion process; a hot air outlet that exchanges heat with the combustion tube; A convection blower of a propeller fan that sends air to A hot air heater having a cylindrical duct, the combustion duct being asymmetrical. (2) The warm air heater according to claim 1, wherein either the left or right side of the combustion tube duct is located close to the convection blower.