JPH068699B2 - Hot air heater - Google Patents

Description

Description: (a) Field of Industrial Application The present invention relates to an indoor open type hot air heater using a burner for vaporizing and burning petroleum fuel such as kerosene as a heat source, and particularly for hot air. The present invention relates to a warm air heater in which a part of air blown by a blower is taken into a combustion cylinder as secondary air.

(B) Conventional technology In this kind of hot air heater, carbon monoxide is taken into the room by taking in part of the air blown by the hot air blower as secondary air into the combustion cylinder and promoting secondary combustion. The one that reduced the amount and made it possible to provide clean and safe warm air heating
No. 57 and Japanese Utility Model Laid-Open No. 56-146852. However, in those conventional configurations, since a large number of vent holes for introducing the air blow of the warm air blower are formed in the lower part of the combustion cylinder facing the flame opening of the burner, the burner Not only does the strength of the combustion cylinder that is heated to a high temperature by the combustion flame decrease, but a large amount of air enters through the vent holes near the blower for warm air, resulting in uneven supply of secondary air. there were. Further, as a hot air heater that solves the above-mentioned problems, that disclosed in Japanese Utility Model Laid-Open No. 59-25048 is known. In this product, a secondary air intake hole consisting of a number of small holes is provided on the lower surface plate of the blower duct unit provided in the main body case, and an annular ventilation chamber is provided under this blower duct unit to provide warm air. A part of the blown air of the blower is guided to the ventilation chamber through the secondary air intake hole, and is supplied from the ventilation chamber to the burner as secondary air.

(C) Problems to be Solved by the Invention In the warm air heater disclosed in Japanese Utility Model Laid-Open No. 59-25048, dust in the room air sucked into the main body case by the warm air blower is blown by the blower duct. If it accumulates on the lower surface of the unit and is used for a long period of time, the secondary air intake hole may be blocked by dust, the secondary air supply amount may be reduced, and a large amount of CO may be generated.

SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned various problems of the prior art.

(D) Means for Solving Problems In the present invention, a main body case having a hot air outlet, a blower chamber provided in the main body case, and a stand provided on a bottom wall plate of the blower chamber are provided. A combustion cylinder, a blower for warm air that blows air toward the combustion cylinder, a burner with a flame opening in the lower part of the combustion cylinder, and a bottomed cylindrical burner case that surrounds the outer periphery of the burner. A bottom plate is attached to the bottom wall plate, and an annular ventilation chamber is formed under the bottom wall plate by the bottom plate, the bottom wall plate, and the burner case. An inlet for introducing a part of the blown air of the blower is provided, and a plurality of air supply holes for supplying the air to the lower portion of the combustion cylinder are provided,
The plurality of air supply holes are annularly arranged inside the combustion cylinder, the inlet is arranged outside the combustion cylinder, and is formed larger than the air supply holes.

(E) Action With this configuration, a part of the blown air of the blower for warm air flows into the ventilation chamber formed below the bottom wall plate of the blower chamber from the inlet, and the bottom wall plate of the blower chamber After cooling the upper part of the burner case, secondary air is supplied to the lower part in the combustion cylinder from a plurality of air supply holes arranged in an annular shape. for that reason,
It is possible to supply a part of the blast of the warm air blower as secondary air into the combustion cylinder without making a hole for the secondary air supply in the combustion cylinder, and the secondary air can be supplied without reducing the strength of the combustion cylinder. Can be uniformly supplied, and the temperature rise of the bottom wall plate of the blower chamber and the burner case can be suppressed. In addition, since the inlet is formed larger than the air supply hole, it can be prevented from being blocked by dust that has flowed into the main body case, and there is no concern that the amount of secondary air supply will decrease due to dust. When dust adheres to the air supply holes, the dust is burned off by the combustion heat of the burner.

(F) Example Next, an example of the present invention will be described. In the figure, (1)
Is a case-like main body case, and the front side plate (2), the top plate (3), the bottom plate (4), and the hot air outlet (5) in which the left and right sides and the back are integrally formed ( 6), the hot air outlet (5) is opened at a height near the lower part of the front plate (6), and is provided with louver blades (7) (7). (8) is the main body case
(1) A cartridge tank in which an oil pan installed on a bottom plate (4) on one side of the inside is detachably inverted on the oil pan (8)
It is designed to store approximately one volume of petroleum fuel that is dripped from (9). (10) is a lid plate provided on the top plate (3), and the lid plate (10) is rotated to open the tank storage chamber (12) partitioned by the partition plate (11) to open the tank storage chamber. (12) Inside the cartridge tank
(9) can be stored in and out freely. (13) is an electromagnetic pump for pumping petroleum fuel in the oil pan (8),
An oscillator (not shown) arranged near the electromagnetic pump (13)
Drive at.

(14) is a blower for air supply that is installed on the other side of the main body case (1), and is equipped with a synthetic resin cylindrical case (16) for attaching a filter (15) to one end opening facing the outside. , The cylindrical case
A turbo type air supply fan (18) in a fan case (17) that can communicate with (16) is rotated by a motor (19), and the fan case (1
Combustion air is forcibly supplied to the air supply pipe (20) connected to (7). (21 is a variable air supply amount damper for adjusting the air supply amount provided in the fan case (17).

(22) is a burner support that can be fixed to the center of the bottom plate (4) of the body case (1), and (23) is a plurality of screws on the burner support (22) via the burner case (24). A vaporization type burner which is fixedly supported by (25), and the burner (23) is constructed as shown in detail in FIG. That is, (26) is a bottomed cylindrical burner body made of aluminum die-casting, inside which the vaporization chamber (27)
And a peripheral wall portion of the vaporization chamber (27) is fitted with an electric heater (28) such as a ceramic heater fitted in the bottom portion for about 230
Heat to ~ 260 ° C. The electric heater 28 is energized by a temperature detector (not shown) such as a thermistor for detecting the temperature of the peripheral wall of the vaporization chamber 27. (29) is a disc-shaped heat shield plate for pressing and supporting the electric heater (28) on the burner body (26) and concealing it, and fixed to the bottom of the burner body (26) with screws (30) is doing. (31) is the burner body (2
6) A cylindrical lead-out tube (33) which is placed on the upper step (32) and hangs down to the middle of the vaporization chamber (27) at the center thereof.
Is a diaphragm plate that can be integrally formed, and the diaphragm plate (31) is formed by aluminum die casting, and is formed on the peripheral wall portion of the vaporization chamber (27) so as to project into the vaporization chamber (27). Screws (35) (35) are fastened to the upper ends of the semi-cylindrical protrusions (34) (34). (36)
Is a cylindrical flame port member forming the flame port of the burner (23), and the flame port member (36) has 4 to 6 horizontally long rectangular flame ports on its peripheral side.
(37) (37) ... are opened, and ring-shaped wire mesh (38) (3) made of heat-resistant metal wire is provided on both inner and outer sides of the flame nozzle member (36).
8) is attached. (39) is a flame mouth top plate that closes the upper opening of the flame mouth member (36), and a detour with the lower end opening facing the upper end of the guide tube (33) of the diaphragm plate (31) at approximately the center of the lower surface. Tube (40)
Is attached, and this flame top plate (39) has two or three mounting rods.
(41) is fixed to the diaphragm plate (31), and the flame port member (36)
Has a fixed support. Also, the flame mouth top plate (39) is a flame mouth member.
It was manufactured separately from (36), but the flame mouth member (3
It can be molded integrally with 6). (42) is the vaporization chamber
Burner body so that it is tangential to the peripheral wall of (27)
A hollow cylindrical nozzle support portion integrally formed in the lower portion of (26), the tip end portion of the air supply nozzle (43) is screwed to the nozzle support portion (42), and the air supply nozzle (43 ) Is connected to the air supply pipe (20) so that the air blown from the air blower (14) through the air supply nozzle (43) is swirled into the vaporization chamber (27) as combustion air. Supplied. (44) is the air supply nozzle (4
3) A refueling nozzle that is inserted in the approximate center of the inside and has its tip facing the inside of the vaporization chamber (27), and is communicated with the electromagnetic pump (13) through the refueling pipe (45), and the electromagnetic pump (13 ), The petroleum fuel in the oil pan (8) pumped up in () is finely supplied to the vaporization chamber (27).

(46) is a blower chamber for a warm air blower (47) formed in a substantially central portion of the main body case (1), and the rear portion of the blower chamber (46) is a peripheral side plate (2) of the main body case (1). The indoor air suction port (48) and the front portion are communicated with the warm air discharge port (5). The warm air blower (47) includes a fan guard (49) mounted on the peripheral side plate (2) of the main body case (1), a fan motor (50) attached to the center of the fan guard (49), Fan motor (50)
It is composed of a propeller fan (51) and a shaft.

The blower chamber (46) includes left and right side wall plates (52) (53), an upper wall plate (54),
Composed of a front wall plate (55) and a bottom wall plate (56), the rear of the left and right side wall plates (52) (53) is provided with a combustion tube (67) for blowing the warm air blower (47), which will be described later. ) Guide plate (57) (5
8) is stuck. The bottom wall plate (56) is formed of an aluminum-plated steel plate, and the burner case (24) is formed in the substantially central portion thereof.
A large-diameter through-hole (59) for joining the upper end opening of the is formed, and a downward slope (60) is formed in the front portion thereof which is bent obliquely downward, and the downward slope (60) is formed. The front end edge (61) of () is brought into contact with the lower side of the hot air outlet (5). (62)
Is a lower plate that is attached to the lower surface of the bottom wall plate (56) to form an annular ventilation chamber (63) around the burner case (24). Into the chamber (63), part of the blast air before the heat exchange of the hot air blower (47) is introduced through the inlets (64) opened on both sides of the rear end of the bottom wall plate (56). Further, as shown in FIG. 3, the introduction port (64) is provided outside the combustion cylinder (67) and farther than the air supply holes (66) (66) which will be described later. Is formed large. (65) (65) ... are secondary air holes with a diameter of about 3 mm formed in the upper part of the peripheral wall of the burner case (24) corresponding to the ventilation chamber (62), and the entire peripheral wall of the burner case (24) They are provided at substantially equal intervals on the circumference. The burner case (24) has a cylindrical shape with a bottom so that the burner case (24) surrounds the burner body (26) of the burner (23) with a space therebetween, as shown in FIG. Shallow squeezer-shaped lower body (24a),
It consists of a cylindrical upper body (24b) in which the lower end of the lower body (24a) is fitted and fixed with screws (66), and the upper end of the upper body (24b) is attached to the bottom wall plate (56). Although it is fixed by spot welding,
It is also possible to integrally form the upper body (24b) and the bottom wall plate (56) by drawing one plate. (66) (66) are a large number of air supply holes for supplying the air in the ventilation chamber (63) into the combustion tube (67) which is vertically erected on the upper surface side of the bottom wall plate (56). Air vent
(66), (66) ... Have a diameter of about 3 mm, and two rows are annularly arranged in a row on the bottom wall plate (56) around the through hole (59).

The combustion cylinder (67) has a hollow cylindrical shape having an inner diameter of about 130 to 140 mm and a height of about 180 mm, and a purifying member (68) such as a cross catalyst is disposed in the upper opening portion thereof for combustion. Cylinder
The combustion gas of (67) passes through the purification member (68) and flows out into the blower chamber (46). (69) is a flame confirmation window provided in the front part of the combustion cylinder (67), and (70) is a jet plate made of stainless steel plate arranged in the lower part of the combustion tube (67). ) Has a funnel shape having an inwardly inclined surface (71) so as to expand upward as shown in FIG. 4, and has an ignition heater and a flame detector (both not shown) in a part thereof. A notch portion (72) for insertion is provided, and an outer peripheral edge (73) of the upper end portion thereof is fixed to the inner surface of the combustion cylinder (67) by spot welding, and the inner peripheral portion of the inclined surface (71) portion is provided. A large number of inner fumaroles (74) (74) for ejecting air around the flame mouth member (36) of the burner (23) are arranged in a row at predetermined intervals in an annular shape, and the inclined surface (71) Around the outer periphery of the portion), a large number of outer fumaroles (75) (75) for ejecting cooling air are arranged in rows near the inner surface of the combustion cylinder (67) at predetermined intervals. . Although the fumarolic plate (70) has a notch (72) in a part thereof, it may have an insertion opening through which an ignition heater or the like is inserted.

Further, (76) is a blower guide plate installed in the blower chamber (46) above the combustion cylinder (67), and this blower guide plate (76) is made of a stainless steel plate, and a hanging piece at its front end. (77) and at the rear end thereof, inclined pieces (78) whose lower ends are slightly below the upper end opening of the combustion cylinder (67) are formed by bending.

The configuration of the present invention is as described above. Next, the operation will be described.

First, by operating an operation switch (not shown), the electric heater (28) is energized, and the heating of the burner body (26) is started by the electric heater (28). About 2 to 3 minutes after starting the operation, the burner body (26) rises to a temperature of about 230 ° C,
The temperature detector detects the temperature rise, and the air supply blower (14)
Drive to start prepurge, then electromagnetic pump (13)
Is driven to supply finely granular petroleum fuel from the fuel supply nozzle (44), and combustion primary air is swirlingly fed into the vaporization chamber (27) from the air supply nozzle (43). The petroleum fuel supplied to the vaporization chamber (27) is instantly vaporized in contact with the inner surface of the peripheral wall of the vaporization chamber (27), and the vaporized gas and combustion primary air are premixed in the vaporization chamber (27), and this mixing is performed. The gas rises in the lead-out tube (33) and reaches the flame member (3
6) Enter the inside, and at this time the mixing is further promoted while bypassing by the bypass cylinder (40), after which the flame mouth (37) and the wire mesh (38) (38)
Ejects to the side or diagonal side through. This flame mouth member
The mixed gas ejected from (36) into the combustion tube (67) is ignited by a spark of an igniter (not shown) to form a blue flame combustion flame around the flame nozzle member (36) to start combustion. .

Almost at the same time as the combustion of the burner (23) started, the warm air blower (47) was driven and external air flowed into the air blower chamber (46) through the suction port (48) and was generated by the rotation of the propeller fan (51). The blown air comes into contact with the outer surface of the combustion tube (67) to exchange heat,
The blast guided above the blast guide plate (76) is the combustion tube (67).
Combining with the combustion exhaust gas of the burner (23) flowing out further, it becomes warm air and is discharged to the outside from the warm air discharge port (5) to perform warm air heating.

On the other hand, a part of the blast air before heat exchange of the warm air blower (47) blown into the air blower chamber (46) flows from the introduction port (64) to the ventilation chamber (63).
The bottom wall plate (56) and the lower plate that are introduced into
The temperature rise in (62) is suppressed, and the air in the ventilation chamber (63) flows into the burner case (24) through the secondary air holes (65) (65) and the air supply holes (66) ( 66) ... is fed to the inside of the combustion tube (67) below the fumarolic plate (70), and the fumarolic holes (74) inside the fumarolic plate (70)
(74) ... The air ejected around the burner member (36) of the burner (23) is supplied to the combustion flame as secondary air to promote combustion. Also, the outer fumaroles of the fumes plate (70). (75) The air jetted from (75) ... rises along the vicinity of the inner surface of the combustion tube (67) to cool the combustion tube (67).

(G) Effect of the Invention As described above, the present invention has a main body case having a warm air discharge port, and a blower chamber provided in the main body case,
A combustion cylinder provided upright on the bottom wall plate of the blower chamber, a blower for warm air that blows air toward the combustion cylinder, a burner with a flame opening in the lower part of the combustion cylinder, and a burner of this burner. A bottomed cylindrical burner case surrounding the outer circumference, a lower plate is attached to the bottom wall plate, and the lower plate, the bottom wall plate and the burner case form an annular ventilation chamber under the bottom wall plate. The ventilation chamber is provided with an inlet for introducing a part of the air blown by the warm air blower, and a plurality of air feed holes for supplying the air to the lower portion of the combustion cylinder. Pores are annularly arranged inside the combustion cylinder, the inlet is arranged outside the combustion cylinder,
Moreover, since it is formed larger than the air supply hole, it is possible to supply a part of the blast of the warm air blower as secondary air into the combustion cylinder without opening a hole for supplying the secondary air in the combustion cylinder. The secondary air can be supplied uniformly without lowering the strength of the combustion cylinder, and the bottom wall plate of the blower chamber and the burner case are cooled by the air introduced into the ventilation chamber. It is possible to prevent the parts from being heated, and moreover, by forming the inlet of the ventilation chamber larger than the air supply hole, while preventing the inlet from being blocked by the dust that has flowed into the main body case, Since the dust adhering to the air supply holes can be burned off by the heat of the burner, it is possible to prevent the secondary air supply amount from decreasing due to the dust, and it is possible to connect clean combustion with little CO generation for a long period of time.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a warm air heater according to an embodiment of the present invention, FIG. 2 is a vertical sectional view, FIG. 3 is an enlarged sectional view of an essential part of FIG. 2, and FIG. 5 and 5 are sectional views of the burner. (1)… Main body case, (5)… Hot air outlet, (23)…
Burner, (24) ... Burner case, (36) ... Flame opening (flame opening member), (46) ... Blower chamber, (47) ... Warm air blower, (5
6) ... Bottom wall plate, (62) ... Bottom plate, (63) ... Ventilation chamber, (64) ...
Inlet, (66) ... air vent, (67) ... combustion tube.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 59-25048 (JP, U) Rikai 55-100818 (JP, U) Japanese Patent Sho 53-16532 (JP, B2)

Claims (1)

[Claims] 1. A main body case having a hot air outlet, a blower chamber provided in the main body case, a combustion cylinder provided upright on a bottom wall plate of the blower chamber, and a combustion cylinder facing the combustion cylinder. A blower for warm air that blows air by means of a burner, a burner with a flame opening in the lower part of the combustion cylinder, and a bottomed cylindrical burner case that surrounds the outer periphery of this burner. By mounting, the lower plate, the bottom wall plate and the burner case form an annular ventilation chamber under the bottom wall plate, and a part of the blown air of the warm air blower is introduced into this ventilation chamber. Along with the introduction port, a plurality of air supply holes for supplying the air to the lower part of the combustion cylinder are provided.
The hot air heater is characterized in that the plurality of air supply holes are annularly arranged inside the combustion cylinder, the inlet is arranged outside the combustion cylinder, and is formed larger than the air supply holes.