JPS6170317A - Combustion type warm-air space heater - Google Patents

Abstract

PURPOSE:To improve the durability of a combustion cylinder and supply secon dary air uniformly by a method wherein a desired number of secondary air holes are provided at the circumferential side of a burner case, which is oppos ing to an air ventilating chamber, and a part of ventilating air is taken into the combustion cylinder as secondary air. CONSTITUTION:Cool air, sent into a ventilating chamber 27 by driving a fan 28 for ventilating warm-air before effecting heat exchange, is introduced into the air venting chamber 42 to cool the bottom wall plate 37 of the ventilating chamber 27. Thereafter, a part of the cool air is injected into a burner case 24 from the secondary air holes 44, 44... to supply it to the circumference of flame port 26 of the burner 23 as the secondary air for combustion. On the other hand, air sent into the combustion cylinder 46 through the ventilating holes 45, 45..., passes through a slit 55 on the outer periphery of a heat shielding plate 49 and generates air curtain on the inside surface of the combustion cylinder 46 to perform the cooling effect of the combustion cylinder 46.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an indoor open-panel combustion hot air heater that uses a burner heat source that vaporizes and burns petroleum fuel such as kerosene.
In particular, the present invention relates to a combustion hot air heater in which a portion of the air blown by a hot air blower is taken into a combustion cylinder as secondary air.

(b) Conventional technology In this type of combustion type hot air heater, a part of the air blown by the hot air blower is taken into the combustion cylinder as secondary air, which promotes secondary combustion and is then released into the room. A device that reduced the amount of carbon oxide and made it possible to provide clean and safe warm air heating was developed in 1972.
This method has been proposed in JP-A-5957 and Japanese Utility Model Application Laid-open No. 56-146852. However, those with conventional configurations.

There are many ventilation holes in the lower part of the combustion tube facing the burner's flame opening to introduce air from the hot air blower, so combustion is heated to a high temperature by the burner's combustion flame. This had the disadvantage of reducing the strength of the cylinder. In addition, because the vents are grooved so that the air from the hot air blower is directly introduced into the combustion cylinder, a large amount of air enters from the vents located close to the hot air blower, causing the air to flow around the combustion flame. It was difficult to uniformly supply secondary air throughout.

e→ Problems to be Solved by the Invention As mentioned above, in this type of conventional combustion type hot air heater, a part of the air blown by the warm air blower is used as secondary air to be fed into the combustion cylinder (when introduced). However, there were problems in that the strength of the combustion tube was reduced or secondary air could not be uniformly supplied around the combustion flame.The present invention was made in view of the above problems, and it The purpose is to improve durability and uniformly supply secondary air.

2) Means for Solving Problems The present invention provides a burner case surrounding the burner @ on the bottom wall plate Gη of the blow chamber (5) of the hot air blower (to) formed inside the main body case (IJ). The upper part of the burner is opened, and a combustion chamber is erected on the upper side of the bottom wall plate 07 to face the flame opening of the burner, and a ventilation chamber is provided on the lower side.
42), a desired number of secondary air holes G14 (44)... are provided on the peripheral side corresponding to the ventilation chamber 0a of the burner case (2s9), and the bottom wall plate 0
7) In the ventilation chamber (421) there are air holes (c) (c) for sending cold air from the hot air blower ■ into the combustion tube ue.
... is provided, and the combustion tube (40 has a
A funnel-shaped heat shield plate (4! II) is provided on the inner surface of the combustion tube (c) and the open space.

(e) The cold air before heat exchange that is blown to the ventilation chamber entrance by the operation of the hot air blower (to) is introduced into the ventilation chamber (421 and cools the bottom wall plate C37 at the ventilation chamber entrance), and then A part of the air is ejected into the burner case from the secondary air hole (4 xian xuan...) and is supplied as combustion secondary air around the flame opening of the burner (c). 49... The air sent into the combustion tube (4e) passes through the open air haze on the outer periphery of the heat shield plate 0, creates an air curtain on the inner surface of the combustion tube (461), and creates an air curtain on the inner surface of the combustion tube (461). It has a cooling effect.Also, the bottom wall plate C37 of the ventilation chamber opening
1, the temperature rise is suppressed by the cooling effect of the cold air introduced into the ventilation chamber (c).

(f) Example Next, an example of the present invention will be described. In the figure, (1
) is a main body case in the form of a housing, which includes a peripheral side plate (2) with left and right sides and a back integrally formed, a top plate (3), a bottom plate (4), and a front plate with a hot air outlet (5). (6), the hot air outlet (5) is opened at the height of the lower part of the front plate (6), and is equipped with louver blades (7) (71...). ) is an oil tray installed on the bottom plate (4) on one side of the main body case (1), and is used to collect oil dripping from a cartridge tank (9) that is removably placed upside down on the kernel oil tray (8). It is designed to store a roughly constant amount of fuel.

αα is a lid plate provided with a top plate (3) K, and by rotating the lid plate (11) and opening the tank storage chamber (12) partitioned by the partition plate αD, the cartridge tank can be placed in the tank storage chamber 0. (9
) can be stored freely in and out. (13 is an electromagnetic pump that pumps up the petroleum fuel in the oil pan (8), and is driven by an oscillator (not shown) disposed near the electromagnetic pump (13).

I is an air supply blower installed on the other side of the main case (1), and is made of a synthetic resin cylindrical case (equipped with El, The turbo-type air supply fan in the fan case α that communicates with the cylindrical case (161) is rotated by the motor α9, and combustion air is forcibly supplied to the air supply pipe (2) connected to the fan case αD (211). is a variable supply air amount damper provided in the fan case (Iη) for adjusting the amount of air supply.

(2) is a burner support stand fixed approximately at the center of the bottom plate (4) of the main body case (1), @ is a vaporization burner fixed and supported on the burner support stand via burner case G4),
The burner @ vaporizes the petroleum fuel supplied from the electromagnetic pump (13) via the fuel supply pipe (C), and also combusts this vaporized gas and the combustion gas supplied from the air supply blower (14 through the supply pipe (C)). - After premixing the air, the mixed gas is ejected sideways or diagonally from the flame opening to cause green combustion.

□□□ is a ventilation chamber for a warm air blower formed approximately in the center of the main body case (1), and the rear part of the ventilation chamber (5) is provided in the circumferential side plate (2) of the main body case (1). The indoor air inlet device and the front portion communicate with the hot air outlet (5), respectively. The warm air blower (■) is pivoted to a fan guard arm installed on the peripheral side plate (2) of the main body case (1), a fan motor C311 attached to the center position of the fan guard arm, and this fan motor C31). It consists of a propeller fan C33.

The ventilation chamber (3) is composed of left and right side wall plates (to) (2), an upper wall plate (g), a front wall plate (g), and a bottom wall plate G7)K, and the bottom wall plate C37) is formed of an aluminized steel plate, and has a large diameter through-hole (to) that connects the upper end opening of the burner case (2 sides) approximately in the center thereof.
The front part thereof is formed with a downwardly inclined part ridge which is bent diagonally downward, and the front end of the downwardly inclined part G1 *G11
is brought into contact with the lower side of the hot air outlet (5). (4υ is a lower plate attached to the lower surface side of the bottom wall plate 01 to form a ventilation chamber (47J) on the lower surface of the bottom wall plate G?i and around the burner case shatter; Cold air before heat exchange from the hot air blower (to) is introduced through the inlet ports (43) provided on both sides of the rear end of the bottom wall plate (9).(44)
G14)... is the ventilation chamber (
A large number of secondary air holes with a diameter of approximately 3 mm are drilled on the peripheral side corresponding to No. 4.

They are provided at approximately equal intervals around the entire circumference of the burner case Qa. The burner case C24) and the burner have a cylindrical shape with a bottom at a certain distance, and the upper end thereof is spot welded to the bottom wall plate (b). It's stuck. (45 (45... is a combustion cylinder (48) vertically fixed on the upper surface of the bottom wall plate 0η, and a large number of air holes for feeding the air inside the ventilation chamber (42); 45... have a diameter of approximately 3 fl, and are arranged in a ring shape on the bottom wall plate c3η around the through hole (7).

The combustion tube (/4119) has a hollow cylindrical shape with an inner diameter of about 130 to 140 mm and a height of about 180+ m, and a purifying member (47) such as a cloth desolator is disposed at the upper opening. , the combustion gas in the combustion tube (4e) is removed by the purification member (4'7).
) and flows into the ventilation chamber @. (48 is the combustion tube (
G19 is a heat shield plate made of a stainless steel plate installed at the lower part of the combustion tube ink pad, and the heat shield plate (41 is the upper part as shown in It has a funnel shape with an inwardly inclined surface 6I that expands toward By spot-welding a plurality of protrusions 54) 54) provided on the combustion tube (46) to the combustion tube (46), an annular gap is formed between the inner surface of the combustion tube (461) and the combustion tube +461 is formed. It should be noted that the protrusion 54) 5 is fixed to form an annular opening.
4)... can also be provided on the combustion cylinder side.

Moreover, (g) is a ventilation guide plate.

The configuration of the present invention is as described above, and the operation will be explained next.

First, the burner @ is preheated by an electric heater (not shown) by operating an operation switch (not shown), and after about 2 to 3 minutes have passed after the start of operation, the electromagnetic pump (13 and air supply blower I is driven, petroleum fuel and combustion air are supplied to the burner ω, which forms a blue combustion flame at the flame opening part 3 and starts combustion.

Almost simultaneously with the start of combustion in the burner, the hot air blower (to) is driven and external air flows into the ventilation chamber (5) from the suction port fan, and the air generated by the rotation of the propeller fan C3S5 is transferred to the combustion tube. (The air that contacts the outer surface of 4e and exchanges heat, and is guided above the air guide plate mark, merges with the combustion exhaust gas of the burner flowing out from the combustion tube (c), and becomes warm air. The hot air is discharged to the outside from the wind outlet (5) to perform hot air heating.

On the other hand, a part of the cold air before heat exchange from the hot air blower @ sent to the ventilation chamber (5) is introduced into the ventilation chamber (43) from the inlet device and its cooling effect causes the bottom wall plate 07 and Lower plate 0υ
The air in the ventilation chamber (4) is
From the secondary air hole 0..., air flows into the burner case (2), and from the air supply hole (a (4! 19...) it is also blown into the combustion tube Ωe below the heat shield plate, An air curtain is generated around the inner surface of the combustion tube e through the gap (to) to cool the combustion tube (461).

(G) Effects of the Invention Since the combustion type hot air heater of the present invention is configured as described above,
It produces the effects listed below.

■ Air from a hot air blower can be supplied to the combustion flame of the burner as combustion secondary air without drilling holes for secondary air supply in the combustion tube, and of course there is no reduction in the strength of the combustion tube. This means that an air curtain can be created along the inner surface of the combustion tube, protecting the combustion tube from combustion flames and further improving durability.

■ The air from the hot air blower is not directly supplied into the combustion cylinder as secondary combustion air, but instead is supplied into the burner case through the ventilation chamber, so the air is almost evenly distributed around the entire combustion flame. - It is possible to supply secondary air to the combustion chamber, increasing combustion efficiency.

■ A ventilation chamber that introduces cold air from the hot air blower is formed on the bottom of the bottom wall plate of the ventilation chamber with a combustion tube installed on the top side.
It is possible to suppress the rise in temperature of the bottom wall plate, and it is possible to prevent adverse thermal effects on electrical components such as an electromagnetic pump arranged in the main body case below the ventilation chamber.

- By equipping the lower inside of the combustion tube with a funnel-shaped heat shield plate, it is possible to reduce the heating of the bottom wall plate by the combustion flame, and further suppress the rise in temperature of the bottom wall plate.

■ Since the lower plate is attached to the lower side of the bottom wall plate to create a double structure, the strength of the bottom wall plate can be increased.

[Brief explanation of drawings]

Fig. 4 is an overall configuration diagram of a combustion hot air heater that is an embodiment of the present invention, Fig. 2 is a vertical sectional view, Fig. 3 is an enlarged sectional view of the main part of Fig. 2, and Fig. 4 is a heat shield. FIG. 3 is a half-sectional view of the plate. (1)...Body case, G...Burner, C4)・
...burner case, (c)...burner mouth part, wire...
Blow room, (g)...hot air blower, C3? )・・
・Bottom wall plate, αυ...lower plate, (421...ventilation chamber, (44)...secondary air hole, (4!19-...
Air vent. t4S... Combustion cylinder, 4... Heat shield plate, Hammer... Opening space. Applicant Sanyo Electric Co., Ltd. and 1 other agent Patent attorney Masao Sano Figure 2 Figure 3I2I

Claims (1)

[Claims] 1. The top of the burner case that surrounds the burner is opened in the bottom wall plate of the blowing chamber of the hot air blower formed in the main body case, and the burner case is opened on the top side of the bottom wall plate. A combustion tube is erected to face the flame opening of the burner case, a lower plate is attached to the lower side to form a ventilation chamber, and a desired number of secondary air holes are formed on the peripheral side of the burner case corresponding to the ventilation chamber. Further, an air supply hole is provided in the bottom wall plate for sending cold air from a hot air blower introduced into the ventilation chamber into the combustion cylinder, and an inner surface of the combustion cylinder is provided at the lower inside of the combustion cylinder. A combustion-type hot air heater characterized by being equipped with a funnel-shaped heat shield plate with an open space. 2. The combustion type hot air heater according to claim 1, wherein the heat shield plate is fixed to the combustion cylinder via a projection.