JP2001065855A - Closed type combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a closed type combustion apparatus to simplify connection between a fan case and a hose for air supply and be contained in a limited space by using a coupling part suppressed in size. SOLUTION: A closed type combustion apparatus comprises a burner; a fan case 1 incorporating a fan for air supply to supply combustion air to the burner; a hose 4 for air supply; and a coupling part 18 to intercouple the fan case 1 and the hose 4 for air supply. In the closed type combustion apparatus, the coupling part 18 consists of a coupling part 35 and a cylinder part 36. This constitution simplifies connection between the fa case and the hose for air supply, decrease a space below the fan case, and decreases the height of an apparatus body to reduce size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed combustion device such as an outdoor supply / exhaust type oil hot air heater.

[0002]

2. Description of the Related Art In general, a closed combustion apparatus takes in outdoor air, mixes this air with fuel as combustion air to burn a burner, and discharges combustion exhaust gas from the burner to the outside. For the intake of this air, a supply / exhaust cylinder with the leading supply port protruding outside is used, and by operating a supply fan arranged below the burner, the supply port of the supply / exhaust cylinder is operated. The air is supplied to the burner through an air supply hose and a fan case.

FIG. 4 is a side view in which a conventional fan case and an air supply hose are connected via connecting parts. 1
Is a fan case, 2 is an air supply motor, 3 is an L-shaped coupling part, and 4 is an air supply hose.

[0004] The fan case 1 has a cylindrical shape having a bottom surface, and a circular hole 6 through which a shaft of an air supply motor passes is formed in the center of a bottom plate 5 forming the bottom surface. Further, an air supply fan 7 is housed inside the fan case 1, and an air supply motor 2 for driving the fan 7 is attached to a lower portion on the outside. The bottom plate 5 of the fan case 1 has a hole 1 for air supply.
1 is formed, and a cylindrical joining part 12 is caulked into the hole 11 and protrudes downward.

[0005] The air supply hose 4 is a flexible hose containing a helical metal wire.

The L-shaped coupling part 3 is formed in a substantially L-shape, has a cylindrical shape and has both ends opened, and a thread groove is formed in the inner periphery of one of the openings 13. The L-shaped connecting part 3 has both openings 13 and 14 connected to the air supply hose 4 and the connecting part 12 of the fan case 1 to connect the two parts, and the inside of the opening 13 provided with the thread groove. The air supply hose 4 is screwed in and fixed. The joint part 12 of the fan case 1 is fitted into the other opening 14, and a fixing band 15 is wound around the outer periphery of a portion where the joint part 12 and the L-shaped joint part 3 overlap, and fixed by screwing.

[0007] As described above, the air supply hose 4 and the fan case 1 are connected by the L-shaped coupling part 3 and the air supply fan 7 is operated, whereby the air supply port (not shown) of the air supply / exhaust cylinder is provided. From outside, the combustion air (outdoor air) is supplied into the burner case through the air supply hose 4 and the fan case 1.

[0008]

When the fan case 1 and the air supply hose 4 are connected to each other, the fan case 1 and the joint part 12 are attached by caulking or the joint part 12 is connected.
Work such as connection of the L-shaped coupling part 3 with the
Further, since the height of the L-shaped coupling component 3 is large and protrudes greatly below the fan case 1, there is a problem that a large space is required for the product.

The present invention has been made to solve the above-mentioned conventional problems. The fan case and the air supply hose can be easily connected to each other. It is an object of the present invention to provide a simple closed combustion device.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a burner, and a fan case having a built-in air supply fan for supplying combustion air to the burner.
In a closed combustion device provided with an air supply hose and a connection part for connecting the fan case and the air supply hose, the connection part includes a connection part and a cylindrical part.

According to a second aspect of the present invention, in the closed type combustion apparatus according to the first aspect, a contact surface of the coupling component, which is in close contact with a fan case, is directly connected to a peripheral edge of an air supply hole formed in the fan case. It is.

According to a third aspect of the present invention, in the closed combustion apparatus according to the first or second aspect, the connecting component forms a thread on an outer periphery of a cylindrical portion, and the inner periphery of the cylindrical portion and an air supply hose. Are connected by screwing.

[0013] The invention of claim 4 is the invention of claim 1, 2 or 3.
In the closed-type combustion device described in (1), the coupling component has a shape in which a cylindrical portion is formed orthogonal to one side surface of the coupling portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a side sectional view of the closed combustion apparatus according to the embodiment of the present invention. Note that the same components as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 3, 10 is a hot air heater as a combustion device, 16 is a supply / exhaust tube, 4 is an air supply hose, 17 is an exhaust pipe, 1 is a fan case, 2 is an air supply motor, and 18 is an air supply motor. A connecting part, 21 is a burner case, 22 is a combustion cylinder, 23 is a heat exchange pipe, and 24 is a hot air fan.

The air supply / exhaust cylinder 16 has a double structure of an outer cylinder 25 and an inner cylinder 26. An air supply path 27 is provided between the outer cylinder 25 and the inner cylinder 26, and an exhaust path 28 is provided inside the inner cylinder 26. It has become. An air supply port 33 and an exhaust port 37 are provided at the tip of the air supply / exhaust tube 16, and the air supply port 33 and the exhaust port 37 are arranged to protrude outdoors. An air supply hose 4 and an exhaust pipe 17 are connected to an outer peripheral portion of the air supply / exhaust tube 16 on the indoor side, and an end surface thereof is closed. Air supply path 27 of air supply / exhaust tube 16
And the air supply hose 4 are communicated with each other, so that outdoor air can be taken into the fan case 1 of the hot air heater 10, and the exhaust pipe 17 and the exhaust path 28 of the air supply / exhaust tube 16 are communicated. As a result, the heat exchange pipe 23 of the hot air heater 10
The exhaust gas after passing through can be discharged outside.

An air supply fan 7 for supplying combustion air to the burner 31 is accommodated in the fan case 1, and an air supply motor 2 for driving the air supply fan 7 is attached to a lower portion on the outside. A connecting part 18 for connecting the fan case 1 and the air supply hose 4 is connected to the fan case 1 adjacent to the air supply motor 2.

A burner case 21 accommodates a burner 31 for evaporating and burning oil, a combustion tube 22 is disposed above the burner 31, and a heat exchange pipe 23 is provided beside the combustion tube 22.
Are juxtaposed. The combustion tube 22 and the heat exchange pipe 23 are communicated with each other by an upper connection case 32, and an exhaust pipe 17 is connected to a lower end of the heat exchange pipe 23.

When the heating operation is started, the air supply motor 2
The air supply fan 7 is rotated by the drive, and combustion air (outdoor air) flows into the fan case 1 from the air supply port 33 of the air supply / exhaust cylinder 16 through the air supply / exhaust cylinder 16, the air supply hose 4, and the connecting part 18. It is taken in and supplied to the burner 21. Burner 2
By the start of the combustion of 1, a combustion flame is formed in the combustion tube 22, and the generated combustion gas is sent to the heat exchange pipe 23 through the connection case 32. At this time, air is blown from the rear of the combustion tube 22 and the heat exchange pipe 23 by the hot air fan 24, and the air warmed by the combustion is discharged from the front hot air outlet 3 in the front.
The air is sent out from the room 4 and heating is performed. The combustion gas in the heat exchange pipe 23 becomes exhaust gas and is discharged outside through the exhaust pipe 17 and the supply / exhaust tube 16.

FIG. 1 is an exploded perspective view showing a connecting part, a fan case, and an air supply hose in one embodiment of the present invention.

Reference numeral 18 denotes a connecting part, 1 denotes a fan case, and 4 denotes an air supply hose. The connecting part 18 includes a box-shaped connecting part 35 and a cylindrical part 36 formed on the side surface of the connecting part 35 at right angles. Are formed integrally with a synthetic resin, and the inside of the cylindrical portion 36 and the connecting portion 35 are communicated with each other.
The coupling portion 35 has a rectangular opening 41 opening upward, and a flange 43 is formed at an upper end portion of the coupling portion 35 so as to be located around the opening 41,
A screw hole 44 is provided on the short side of the flange 43, and the flange 43 is in close contact with the fan case 1 via a seal 47 for sealing. Reference numeral 42 denotes a guide formed along the groove of the opening 41 so as to protrude above the flange 43. Further, the cylindrical portion 36
The thread N is formed on the outer periphery of the thread.

The fan case 1 has a cylindrical shape having a bottom surface, and a rectangular square hole 45 is formed in a bottom plate 5 forming the bottom surface.
In the vicinity of both short sides of the square hole 45, screw holes 46 into which the screws for mounting the flange are screwed are formed.
The square hole 45 is formed so as to fit the outer circumference of the guide 42 of the coupling component 18, and the interval between the screw holes 46 is the same as the interval between the screw holes 44 of the coupling component 18.

The air supply hose 4 is a cylindrical flexible hose containing a helical metal wire.

The connecting part 18 and the fan case 1 are connected by a guide 42 of the connecting part 18 via a packing 47 for sealing.
Is fitted in the square hole 45 of the fan case 1 and the flange 43
From the screw holes 44 to the screw holes 46 on both sides of the square hole 45. The coupling component 18 and the air supply hose 4 are connected by being screwed into the thread N of the cylindrical portion 36 using the spiral shape of the air supply hose 4. In this way, the air supply hose 4 and the fan case 1 are connected to each other through the connecting parts 18 without air leakage.

As described above, when connecting the fan case 1 and the connecting part 18, troublesome work such as caulking connection between the fan case 1 and the connecting part 12 as in the prior art is eliminated, and the work content is simplified. Can be achieved. Also, after connecting the joining component 12 to the fan case 1 by caulking, the joining component 12
And the L-shaped coupling part 3, and
Since the fan case 1 and the connecting part 18 can be easily screw-connected to each other as compared with a connection in which the fixing is performed by using a screw, the number of work items is reduced and the work time can be shortened.

Further, since the thread N is formed on the outer periphery of the coupling part 18 as compared with the conventional one in which a thread groove is formed on the inner periphery of the L-shaped coupling part 3, the screw portion can be easily formed and the production is easy. Things.

FIG. 2 is a partially cutaway side view showing a state in which the fan case 1 and the air supply hose 4 are assembled by the connecting part 18 of the present invention. The downward projecting dimension of the coupling component 18 attached to the bottom plate 5 of the fan case 1 is substantially the same as the projecting dimension of the air supply motor 2. Since the coupling component 18 is constituted by the box-shaped coupling portion 35 and the cylindrical portion 36 integrally formed on one side surface of the coupling portion 35 at right angles, the cylindrical portion 36 to which the air supply hose is connected can be connected to the fan case 1. The coupling component 18 can be connected to the fan case 1 in a state where the coupling component 18 is close to the bottom surface 5, and the vertical dimension of the coupling component 18 can be reduced to a value close to the diameter of the air supply hose. Therefore, the coupling component 1 protruding downward from the fan case 1
8 can be suppressed to be substantially equal to the protrusion size of the air supply motor 2, and the space below the fan case 1 can be made narrower than before so that the height of the main body of the hot air heater 10 can be reduced. The size can be reduced and the size can be reduced.

Although the present invention has been described based on one embodiment, the present invention is not limited to this. In the present embodiment, the connecting part 35 of the connecting part 18 is formed in a box shape, but an opening 41 is provided in the upper part, and the cross section is not limited to a box shape as long as the amount of air passing therethrough is secured. It may be U-shaped, polygonal, or another shape. The shape of the opening 41 is not limited to a rectangle, but may be an oval, a polygon, or another shape.

[0029]

As described above, according to the present invention,
Connecting parts that connect the fan case and the air supply hose,
The connection between the fan case and the air supply hose can be made simpler and the space under the fan case can be narrowed, and the height of the device body can be reduced. It can be made smaller.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a coupling component, a fan case, and an air supply hose according to an embodiment of the present invention.

FIG. 2 is a side view partially cut away in a state where the components of FIG. 1 are assembled.

FIG. 3 is a side sectional view of the warm air heater showing a state in which the components of FIG. 1 are incorporated.

FIG. 4 is a side view of a main part of a partially cutaway showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fan case 2 Air supply motor 4 Air supply hose 5 Fan case bottom plate 7 Air supply fan 10 Hot air heater 11 Air supply hole 12 Joining parts 16 Supply / exhaust cylinder 17 Exhaust pipe 18 Coupling part 21 Burner case Reference Signs List 22 Combustion cylinder 23 Heat exchange pipe 24 Hot air fan 25 Outer cylinder 26 Inner cylinder 27 Air supply path 28 Exhaust path 31 Burner 33 Supply / exhaust cylinder air supply port 35 Joining part 36 Cylindrical part 41 Opening 42 Guide 43 Flange (contact surface) ) 45 Fan case square hole (air supply hole) 47 Packing N Thread

 ──────────────────────────────────────────────────の Continuing on the front page (72) Kazuaki Shimada 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Hiroto Hisamaki Keihan-hondori, Moriguchi-shi, Osaka 2-5-5 Sanyo Electric Co., Ltd. F term (reference) 3K023 BA01 BA06 BA15

Claims (4)

[Claims] A burner; a fan case having a built-in air supply fan for supplying combustion air to the burner; an air supply hose; and a coupling component for connecting the fan case and the air supply hose. In the enclosed combustion device, the coupling component is composed of a coupling portion and a cylindrical portion. 2. The hermetic combustion apparatus according to claim 1, wherein a contact surface of the coupling component, which is in close contact with the fan case, is directly connected to a peripheral edge of an air supply hole formed in the fan case. 3. The connecting part according to claim 1, wherein a thread is formed on an outer periphery of the cylindrical portion, and the cylindrical portion and an inner periphery of the air supply hose are connected by screwing. Hermetic combustion equipment. 4. The closed combustion apparatus according to claim 1, wherein the coupling component has a shape in which a cylindrical portion is formed orthogonal to one side surface of the coupling portion.