JP2001041582A - Heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heater which can enhance the heat exchange efficiency of a heat exchanger, by preventing the overheating of a burner head and further, preventing the partial overheating of the front panel of the heat exchanger. SOLUTION: A heater, where a heat exchanger 20 in the shape of a thin flat box is arranged in front of the cabinet and also a burner 30 forming a combustion flame A2 frontward and an exhaust gas outlet 24 positioned above the burner 30 are provided in the rear of the heat exchanger 20, is of such structure that the section of attachment of a burner 30 out of the rear of the heat exchanger 20 is recessed rearward to isolate a burner head from the front panel 21 of the heat exchanger. Hereby, the combustion flame A2 jetted out frontward from the burner never reaches the front panel 21, and this heater can prevent the partial overheating caused by the contact of the combustion flame A2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for radiating radiant heat from the front of a cabinet to heat a room.

[0002]

2. Description of the Related Art Conventionally, a heater of this type has been used.
No. 48243, a reflection type heater, that is, a type that radiates combustion heat of a burner through a combustion tube or a reflection plate made of heat-resistant glass and further flows exhaust gas to a heat exchanger to perform indoor radiant heating. Generally known.

[0003] However, such a heater has a large number of components such as a reflection plate for obtaining radiant heat, and the number of components has become extremely large. In addition, the width of the heater in the front-rear direction is increased due to the horizontally installed heat exchanger, and the heater cannot be made thinner.

In order to solve such a problem, the applicant has proposed a heater according to Japanese Patent Application No. 10-299686.

In this heater, the heat exchanger is formed in a flat box shape having a small front and rear width, and the wide front surface of the heat exchanger is arranged on the front surface of the cabinet, while the heat exchanger is mounted on the rear surface of the heat exchanger. A burner is installed so as to face toward the front surface of the vehicle.

According to this heater, heat is radiated from the wide front surface of the heat exchanger to perform indoor heating.

[0007]

However, in the latter type of heater, the width of the heat exchanger in the front-rear direction is narrowed, so that the combustion flame ejected from the burner at the time of large combustion is applied to the front panel of the heat exchanger. There has been a problem that a part of the heat exchanger (for example, a viewing window) is abnormally heated when directly touched, causing cracking and thermal deformation of the viewing window. Also, since the width of the heat exchanger in the front-rear direction is narrow, the combustion flame ejected from the burner comes into contact with the heat exchanger before expanding in the radial direction, and the combustion flame and the heat exchanger The facing area is small. Therefore, there is a problem that the radiant heat of the combustion flame to the front panel of the heat exchanger is somewhat reduced, and the heat exchange efficiency is reduced.

[0008] In the latter heater, the combustion flame is blown obliquely forward from the entire periphery of the burner head, while the draft in the heat exchanger flows from the lower part to the upper part (exhaust gas outlet side). As a result, the combustion flame ejected from around the burner head tends to extend upward due to the draft while extending forward. Therefore, of these combustion flames, the combustion flame ejected from the lower part of the peripheral wall of the burner head once extends obliquely downward from the burner head, and thereafter, is approached to the burner head by a draft in the heat exchanger (heat exchange). (In the upward direction of the container).

Here, when the large combustion operation is performed, the flow velocity of the combustion air is high (increase in the amount of combustion air), and the outer flame of the combustion flame ejected from the burner head (the highest temperature of the combustion flame) Portion) is separated from the burner head, so that the external flame does not contact the burner head.

On the other hand, when the micro combustion operation is performed,
The combustion flame is small and the external flame is close to the burner head,
Since the draft in the heat exchanger flows from the lower part to the upper part, there is a problem that the external flame of the combustion flame ejected from the lower part of the peripheral wall of the burner head touches the burner head and overheats the burner head. .

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to prevent overheating of a burner head, and further to prevent overheating of a part of a front panel of a heat exchanger, thereby improving the heat exchange efficiency of the heat exchanger. To provide machines.

[0012]

According to the present invention, a flat box-shaped heat exchanger having a small front-rear width is arranged on the front surface of a cabinet. On the back side, a burner that forms a combustion flame toward the front and a heater equipped with an exhaust gas outlet located above the burner. The structure is separated from the front panel of the heat exchanger.

According to the first aspect of the present invention, the burner head is separated from the front panel of the heat exchanger by depressing the mounting portion of the burner on the rear surface of the heat exchanger rearward, so that the burner head is ejected forward from the burner head. The combustion flame does not reach the front panel, and partial overheating due to the contact of the combustion flame can be prevented.

In the heater according to the second aspect, a flame guide plate is formed around the burner head to guide the combustion flame in the radial direction of the burner head. As a result, the combustion flame ejected from the burner head extends along the flame guide plate (because the combustion flame extends in the radial direction), so that the forward length of the combustion flame becomes short, Radiant heat is transmitted to the entire exchanger. Further, since the external flame of the combustion flame is separated from the burner head, the burner head is not overheated even during the minute combustion.

According to a third aspect of the present invention, in the heater, an exhaust gas guide frame is provided in the heat exchanger, which surrounds an upper portion and a side surface of the combustion flame and communicates with an exhaust gas outlet through a lower surface opening. According to the present invention, since the exhaust gas is once guided downward and then rises, the upper part and the lower part of the heat exchanger are sufficiently heated, and the heat exchange efficiency of the entire heat exchanger is improved.

According to a fourth aspect of the present invention, a heater adopts a configuration in which the burner head of the first aspect is separated from the front panel, and has a structure employing the flame guide plate of the second aspect.
According to the present invention, contact of the combustion flame with the front panel is reliably prevented, and overheating of the burner head during minute combustion is also prevented.

According to a fifth aspect of the present invention, there is provided a heater configured to separate the burner head of the first aspect from the front panel, and employs the exhaust gas guide frame of the third aspect. According to the present invention, partial overheating of the heat exchanger due to the combustion flame is prevented, and the heat exchange efficiency of the entire heat exchanger is improved.

A heater according to a sixth aspect employs both the flame guide plate according to the second aspect and the exhaust gas guide frame according to the third aspect. According to the present invention, overheating of the burner head during minute combustion is prevented, and the heat exchange efficiency of the entire heat exchanger is improved.

A heater according to a seventh aspect employs a structure in which the burner head according to the first aspect is separated from the front panel, employs the flame guide plate according to the second aspect, and further includes an exhaust gas guide frame according to the third aspect. It has been adopted. According to the present invention, partial overheating of the heat exchanger due to the combustion flame is prevented, and overheating of the burner head at the time of minute combustion is prevented, and the heat exchange efficiency of the entire heat exchanger is improved.

[0020]

1 to 4 show a first embodiment of a heater according to the present invention. FIG. 1 is a front view of the heater, FIG. 2 is a schematic side view of the heater, and FIG. 3 is a perspective view showing a heat exchanger and a burner part, and FIG. 4 is a sectional view of the heat exchanger and the burner part.

As shown in FIGS. 1 and 2, this heater has a flat box-shaped cabinet 10 as a whole, and the wide surface of the cabinet 10 is formed so as to be located in front and rear. In addition, an opening 11 for a heat exchanger is formed on the front side of the cabinet 10, and an operation panel 1 for operation is provided.
2 and a wire guard 13 for preventing contact with fingers and the like are provided.

Next, the equipment parts installed inside the cabinet 10 will be described. That is, the heat exchanger 20 is installed on the front side of the cabinet 10. The heat exchanger 20 has a flat box shape with a small front and rear width (width dimension in the front and rear direction: 5).
0 mm), and the front panel 21 which is a wide surface of the heat exchanger 20 is disposed so as to face the room through the opening 11 of the cabinet 10. A viewing window 22 made of heat-resistant glass is provided on the front panel 21.

This heat exchanger 20, as shown in FIG.
A mounting hole 23 swelling rearward is formed near the lower part of the rear surface, and the burner 30 and the combustion blower 40 are formed in the mounting hole 23.
Is installed. In addition, an exhaust gas outlet 24 is formed on the upper rear surface of the heat exchanger 20 as shown in FIG. 3, and exhaust gas is passed through the auxiliary heat exchanger 50 through the exhaust gas outlet 24.
Air is exhausted through an exhaust pipe 60.

As shown in FIG. 4, the burner 30 has an oil supply pipe 30a for supplying oil pumped by an oil pump (not shown), and a cup-shaped diffusion for diffusing the oil supplied through the oil supply pipe 30a. It has a body 31, a vaporizer 32 for vaporizing the oil diffused by the diffuser 31, and a mixer (burner head) 33 for mixing the oil vaporized by the vaporizer 32 with combustion air. . Burner head 3
A flame guide plate 35 is provided around 3 so as to cover it. The flame guide plate 35 has a substantially trumpet shape whose diameter increases toward the front, and guides the combustion air along its inner and outer surfaces. The diffuser 31 is connected to a drive motor 41 of a combustion blower 40 by an output shaft 42.
And the diffuser 31 rotates simultaneously with the driving of the combustion blower 40, and the primary combustion air (dotted line arrow)
Flows through the diffuser 31 to the burner head 33 and mixes with the vaporized fuel to form a primary combustion flame A1 from the flame hole 33a. On the other hand, the air for secondary combustion (2
A dotted chain arrow) is blown through the outside of the flame guide plate 35,
The secondary combustion flame A2 is formed from the periphery of the burner head 33 to the front by the secondary combustion air.

The burner 30 and the combustion blower 40 are integrally mounted on the back of the heat exchanger 20 to form a unit. As shown in FIG. 2, the width of this unit in the front-rear direction is 197 mm, and The width dimension in the front-rear direction including the cabinet 10 is 295 mm. here,
The heater according to the present embodiment (heating output: 6,000 kca)
1 / h) is 295 mm in the front-rear direction, whereas a conventional heater (having the same heating output as the heater according to the present embodiment) has a width dimension in the front-rear direction of 4 mm.
Since the width is 25 mm, the width of the heater in the front-rear direction is about 30% thinner in the heater according to the present embodiment.

When performing the combustion operation in the heater according to the present embodiment, as shown in FIG. 4, the combustion blower 40 is driven to blow the primary combustion air to the burner head 33, and the secondary combustion air is blown. The working air flows around the burner head 33 through the outside of the flame guide plate 35. The secondary combustion air flowing around the burner head 33 flows in the radial direction of the burner head 33 along the flame guide plate 35 (so-called Coanda effect). Accordingly, the secondary combustion flame A2 also spreads along the secondary combustion air, and the size of the secondary combustion flame A2 protruding forward decreases.

Further, since the burner 30 is provided in the mounting hole 23 which is recessed rearward on the back of the heat exchanger 20, the burner head 33 is largely separated from the front panel 21 of the heat exchanger 20.

With this configuration, it is possible to prevent the secondary combustion flame A2 from coming into contact with the front panel 21 during the large combustion, especially from the view window 22. On the other hand, at the time of minute combustion, flame contact of the secondary combustion flame A2 with the burner head 33 can be prevented.

The flame guide plate 35 causes the secondary combustion flame A2
Spreads in the radial direction of the burner head 33, so that the heat of the combustion flame A2 is transmitted to the entire front panel 21 and radiation heating from the front panel 21 is efficiently performed.

FIGS. 5 and 6 show a second embodiment of the heater according to the present invention.
1 shows an embodiment. In this embodiment, an exhaust gas guide frame 70 is installed in a heat exchanger 20. As shown in FIG. 5A, the exhaust gas guide frame 70 has a secondary combustion flame A2.
Are arranged so as to surround the upper surface and side surfaces of the exhaust gas, and the exhaust gas (open arrow) flows upward from below through the lower surface opening.

The operation of the heater according to this embodiment will be described with reference to FIG.
(A) (example in which the exhaust gas guide frame 70 is installed) and FIG. 6B (example in which the exhaust gas guide frame 70 is not installed (conventional example)) will be described.

That is, when the exhaust gas guide frame 70 is not installed, the exhaust gas tends to rise immediately and flow to the exhaust gas outlet 24 (open arrow). Therefore, the secondary combustion flame A
6 and a portion (broken line) heated by the exhaust gas, as shown in FIG. 6B, is a part of the front panel 21 (especially, the lower portion and both sides of the front panel 21 are insufficiently heated). Heat exchange efficiency is low.

On the other hand, when the exhaust gas guide frame 70 is installed, the exhaust gas once flows toward the lower part of the exhaust gas guide frame 70, and then rises and flows to the exhaust gas outlet 24. As shown, the heating portion (broken line) is the entire front panel 21. Therefore, the heat exchange efficiency increases.

The other constructions and operations, such as the burner 30 according to the present embodiment, are the same as those of the first embodiment, so that the description thereof will be omitted.

FIG. 7 shows a third embodiment of a heater according to the present invention. In this embodiment, the shape of the exhaust gas guide frame 70 is changed, that is, the upper corner portion of the exhaust gas guide frame 71 is formed into an R shape. I have. According to this embodiment, the exhaust gas rising toward the exhaust gas outlet 24 is smoothly discharged along the R shape. Other configurations and operations are the same as those of the first embodiment.
This is the same as the embodiment.

FIG. 8 shows a fourth embodiment of the heater according to the present invention. In this embodiment, the size of the exhaust gas guide frame 70 is changed, that is, the size of the exhaust gas guide frame 72 is increased in the vertical direction. The upper end of the guide frame 72 is located near the exhaust gas outlet 24. According to this embodiment, the exhaust gas rising from the lower portion of the exhaust gas guide frame 72 flows through the entire heat exchanger 20 along the outer surface of the exhaust gas guide frame 72. Other configurations and operations are the same as those of the first embodiment.

FIG. 9 shows a fifth embodiment of the heater according to the present invention. In this embodiment, another exhaust gas guide frame 73 is provided between the exhaust gas guide frame 70 and the exhaust gas outlet 24. . According to this embodiment, since the exhaust gas is also guided in the lateral direction by the upper exhaust gas guide frame 73, the exhaust gas flows through the entire heat exchanger 20. Other configurations and operations are the same as those of the first embodiment.

FIG. 10 shows a sixth embodiment of a heater according to the present invention. In this embodiment, an exhaust gas flow is provided between the exhaust gas guide frame 70 and the exhaust gas guide frame 73 according to the fifth embodiment. An upper and lower partition plate 74 having a hole 74a is provided. According to this embodiment, the lower exhaust gas guide frame 7
The exhaust gas that has risen from the lower portion of the cylinder 0 flows toward the center side by the upper and lower partition plates 74 and rises again through the gas flow holes 74a. The raised exhaust gas enters the upper exhaust gas guide frame 73, rises again from the lower opening side of the exhaust gas guide frame 73, and flows into the gas discharge outlet 24. As described above, in the heater according to the present embodiment, the exhaust gas discharge path can be lengthened, so that the heat of the exhaust gas can be efficiently used for radiant heating. Other configurations and operations are the same as those of the first embodiment.

FIG. 11 shows a seventh embodiment of a heater according to the present invention. In this embodiment, an exhaust gas guide frame 75 is formed which covers the entire area around the burner head 33 and has a wide opening toward the front. The upper frame 75a of the exhaust gas guide frame 75
And a small-diameter gas hole 75c in the side frame 75b,
A large diameter gas hole 75e is formed in d. Thereby, the gas holes 75c of the upper frame 75a and the side frames 75b are formed.
The amount of exhaust gas flowing out of the gas holes 75e of the lower frame 75d is larger than the amount of exhaust gas flowing out of the lower frame 75d, and the exhaust gas flows through the entire heat exchanger 20 as in the first embodiment, thereby improving heat exchange efficiency. Other configurations and operations are the same as those of the first embodiment.

[0040]

As described above, according to the present invention,
It is possible to prevent overheating of the burner head at the time of minute combustion, and to prevent heat damage of the heat exchanger due to partial overheating due to contact of the combustion flame, and to improve the heat exchange efficiency of the heat exchanger. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a heater according to a first embodiment.

FIG. 2 is a schematic side view of a heater according to the first embodiment.

FIG. 3 is a perspective view showing a heat exchanger and a burner according to the first embodiment.

FIG. 4 is a cross-sectional view showing a heat exchanger and a burner according to the first embodiment.

FIG. 5 is a schematic side view of a heater according to a second embodiment.

FIG. 6 is an explanatory diagram showing a flow of exhaust gas according to the second embodiment.

FIG. 7 is an explanatory diagram showing a flow of exhaust gas according to a third embodiment.

FIG. 8 is an explanatory diagram showing a flow of exhaust gas according to a fourth embodiment.

FIG. 9 is an explanatory diagram showing a flow of exhaust gas according to a fifth embodiment.

FIG. 10 is an explanatory diagram showing a flow of exhaust gas according to a sixth embodiment.

FIG. 11 is an explanatory diagram showing a flow of exhaust gas according to a seventh embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Cabinet, 20 ... Heat exchanger, 21 ... Front panel, 23 ... Mounting hole, 24 ... Exhaust gas outlet, 30 ... Burner,
33: Burner head, 35: Flame guide plate, 70, 71, 7
2, 73, 75: Exhaust gas guide frame, A2: Secondary combustion flame.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F23D 11/06 F23D 11/06 C 11/40 11/40 A (72) Inventor Sakae Suzuki Isesaki City, Gunma Prefecture (72) Inventor Shinji Kawachi 20th Kotobukicho, Isesaki-shi, Gunma In-house (72) Inventor Yukio Kanai 20th Kotobukicho, Isesaki-shi, Gunma F-term (reference) 3K052 AA08 AB06 AC01 AC05 DA06 DB03 3L028 AA04 AB01 AC04

Claims (7)

[Claims] 1. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of a cabinet, and a burner which forms a combustion flame toward the front at the back of the heat exchanger. A heater provided with an exhaust gas outlet located therein, wherein a burner mounting portion of the rear surface of the heat exchanger is depressed rearward to separate a burner head from a front panel of the heat exchanger. 2. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of the cabinet, and a burner which forms a combustion flame toward the front at the back of the heat exchanger. A heater having an exhaust gas outlet located therein, wherein a flame guide plate is formed around a burner head to guide a combustion flame in a radial direction of the burner head. 3. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of the cabinet, and a burner which forms a combustion flame toward the front at the back of the heat exchanger. A heater provided with an exhaust gas outlet located therein, wherein an exhaust gas guide frame surrounding the upper and side surfaces of the combustion flame and communicating with the exhaust gas outlet through a lower surface opening is provided in the heat exchanger. 4. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of the cabinet, and a burner that forms a combustion flame toward the front at the back of the heat exchanger. In the heater provided with the exhaust gas outlet located, the mounting portion of the burner in the back of the heat exchanger is depressed backward to separate the burner head from the front panel of the heat exchanger, and around the burner head. A heater having a flame guide plate for guiding a combustion flame in a radial direction of the burner head. 5. A flat box-shaped heat exchanger having a small front-rear width is disposed at the front of the cabinet, and a burner that forms a combustion flame toward the front at the back of the heat exchanger. In a heater provided with a located exhaust gas outlet, the mounting portion of the burner in the back of the heat exchanger is depressed rearward to separate the burner head from the front panel of the heat exchanger, and inside the heat exchanger. A heater provided with an exhaust gas guide frame surrounding the upper and side surfaces of the combustion flame and communicating with the exhaust gas outlet through a lower surface opening. 6. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of the cabinet, and a burner that forms a combustion flame toward the front at the back of the heat exchanger. In a heater provided with a located exhaust gas outlet, a flame guide plate is formed around the burner head to guide the combustion flame in the radial direction of the burner head, and the upper and side surfaces of the combustion flame are formed in the heat exchanger. A heater provided with an exhaust gas guide frame communicating with the exhaust gas outlet through an opening on the lower surface of the enclosure. 7. A flat box-shaped heat exchanger having a small front-rear width is arranged at the front of the cabinet, and a burner that forms a combustion flame toward the front at the back of the heat exchanger. In the heater provided with the exhaust gas outlet located, the mounting portion of the burner in the back of the heat exchanger is depressed backward to separate the burner head from the front panel of the heat exchanger, and around the burner head. A flame guide plate for guiding the combustion flame in the radial direction of the burner head is formed, and an exhaust gas guide frame surrounding the upper and side surfaces of the combustion flame and communicating with the exhaust gas outlet through a lower surface opening is provided in the heat exchanger. A heating machine characterized by the following.