JPH05272715A - Combustion device - Google Patents

Abstract

PURPOSE:To provide a combustion device for burning liquid fuel in which a variation in an amount of air generated when air required for combustion is restricted to get a stable combustion state. CONSTITUTION:There are provided a burner head 26 in which a fine and elongated flame port 27 and a secondary air opening 28 are alternatively arranged and its outer circumference is covered by a burner case 26a; a gasification device 21 connected to one end of the burner head and having independent gasification chambers 21a, 21b; a gasification device cover 25 for covering the gasification device 21; and a box- like mixing chamber having a bottom part covering the gasification device 21 and a lower surface of the burner head 26 and forming two independent gas passages extending from the gasification device 21 to the burner head 26. In addition, there are provided a main body case 32 covering the gasification device 21, the burner head 26 and the mixing chamber; a blower 31 connected to one end of the main body case 32; and a partition plate 33 dividing a clearance between the main body case 23 of an air opening 32a and the gasification device cover 25 into a right side and a left side. With such an arrangement, it becomes possible to divide the air required for combustion into a forward air and a rearward air, respectively, and to supply them, resulting in that a stable combustion state can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device which uses petroleum or the like as a liquid fuel and is used as a water heater, a heater or the like.

[0002]

2. Description of the Related Art Conventionally, this type of combustion apparatus has a structure as shown in FIGS. As shown in the figure, inside the carburetor 1 having a built-in heater 2 and having independent vaporization chambers 1a and 1b and a fin portion 1c for receiving combustion heat, nozzles 3a and 3b communicating with combustion pumps 4a and 4b are provided. No 5 is a carburetor cover that is provided with a heat insulating material on the inner surface to insulate the heat radiation of the carburetor 1, 6 is a burner head connected to the carburetor 1, and the flame port portion 7 having a large number of pores on the upper surface and the upper surface The secondary air openings 8 having a large number of small holes are arranged alternately so that both end rows 8a become the secondary air openings 8. Reference numeral 9 denotes a carburetor and a mixing chamber which is provided below the burner head 6 and has independent spaces so as to partition the burner head 6 into two blocks, a igniter facing the flame outlet 7. Reference numeral 11 is a blower that sends combustion air. Reference numeral 12 is a main body case that covers the vaporizer 1, the burner head 6, the mixing chamber 9, and the like.

In the above structure, when the heater 2 is energized and the vaporizer 1 reaches a predetermined temperature, the fuel pumps 4a, 4b and the blower 11 are operated and fuel is ejected from the nozzles 3a, 3b to vaporize the vaporizer chamber 1a of the vaporizer 1. It becomes vaporized gas in 1b. A part of the combustion air is supplied into the vaporization chambers 1a, 1b and mixed with the vaporized gas to become a premixed gas, which is ejected from the flame port 7 of the burner head 6 through the internal space of the mixing chamber 9. Other air is the space 1 between the burner head 6 and the main body case 12.
It is supplied from the secondary air port 8 of the burner head 6 via 2a. The premixed gas ejected from the flame opening 7 is ignited by the igniter 10 to form a combustion flame, and the secondary air supplied from the secondary air opening 8 forms a stable flame and burns it. At this time, since the burner head 6 is partitioned by the mixing chamber 9, the front and rear two blocks form independent combustion sections, and when one of the fuel pumps is stopped, only one side of the two blocks of the burner head 6 burns. To do. The heat required for the vaporization of combustion is the heat of the flame formed on the upper surface of the flame port portion 7 during combustion, and is mainly received by the fin portion 1c of the vaporizer 1, and the shortage is supplied by the heater 2.

[0004]

However, in the above-mentioned conventional structure, since one blower supplies air to the two paths, when the flow path resistance fluctuates in one combustion block, the other combustion There are problems that the amount of air in the block fluctuates and the combustion state changes, and that the combustion becomes unstable due to turbulence in the air flow near the middle of the air inlets of the two vaporization chambers.

The present invention has been made to solve the above problems and has an object to stabilize the combustion by rectifying and supplying air to two paths by providing a partition plate at the inlet of the air.

[0006]

In order to achieve the above object, the present invention comprises a partition plate so as to divide the gap between the air inlet portion of the main body case and the carburetor cover to the left in the air flow direction. It has a different configuration.

[0007]

According to the present invention, the air supplied from the blower into the main body case is divided by the partition plate, and one of the air passes through the vaporization chamber on the left side and the gap between the main body case and the vaporizer cover located on the left side. From the secondary air port, the other air passes through the gap between the vaporization chamber on the right side and the body case located on the right side and the carburetor cover, and is supplied to the combustion unit from the secondary air port. At this time, since the air supplied from the blower is divided at the inlet of the main body case, the air is supplied independently to the left side and the right side of the main case, and a stable air supply state can be obtained.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 21 denotes a vaporizer and a heater 2
2 is built in, and two independent vaporization chambers 21a and 21b are provided inside and a fin 21c that receives combustion heat is provided above. Reference numerals 23a and 23b denote nozzles whose tips are exposed to the insides of the vaporizers 21a and 21b, and the other ends thereof are connected to the fuel pumps 24a and 24b, respectively. Reference numeral 25 denotes a carburetor cover, which is configured to cover the carburetor 21 by providing a heat insulating layer on the inner surface thereof to suppress heat radiation of the carburetor 21. Reference numeral 26 is a burner head, in which elongated flame openings 27 and secondary air openings 28 are alternately arranged, and the secondary air openings are arranged in both end rows 28a, and the outer circumference except the connection portion with the carburetor 21 is arranged. It is configured to be covered with the burner case 26a. The flame mouth portion 27 has an open lower surface and a large number of fine pores formed on the upper surface. The lower surface of the secondary air port 8 is closed, a large number of small holes are formed in the upper surface, and an opening 28b is formed on the side opposite to the connecting portion with the carburetor 21. Reference numeral 29 denotes a mixing chamber, which forms an independent passage for conveying the premixed gas formed in the vaporizer 21 to the burner head 26.
a is provided, the burner head 26 is divided into two blocks on the left side and the right side in the flow direction of the premixed gas, and the premixed gas is supplied independently of each other. Reference numeral 30 is an igniter for igniting fuel, and 31 is a blower for supplying air for combustion. Reference numeral 32 denotes a main body case that covers the vaporizer cover 25, the burner head 26, and the mixing chamber 29, and forms a secondary air passage 34 on the outer periphery of the vaporizer cover 25 and the burner head 26. One of the openings 3 serves as an air inlet.
The blower 31 is connected by providing 2a. Reference numeral 33 is a partition plate and the air inlet portion 32a of the main body case 32 and the carburetor cover 2
5 is provided so as to divide the gap (secondary air passage 34) into right and left portions in the direction of the air flow.

In the above structure, when the heater 22 is energized and the vaporizer 2 reaches a predetermined temperature, the fuel pumps 24a, 24
b and the blower 31 are operated, fuel is supplied from the fuel tank (not shown) to the nozzle 23 by the fuel pumps 24a and 24b.
The wall surfaces of the vaporizer 1 heated and supplied into the vaporization chambers 21a and 21b from the tip portions of a and 23b are vaporized to become vaporized gas. The combustion air is supplied by a blower 31 and divided into a front part and a rear part by a partition plate 33, and a part of each is supplied into the vaporization chambers 21a and 21b and mixed with the vaporized gas to become a premixed gas. While being mixed, it is ejected from the pores on the upper surface through the lower opening of the flame opening 27 of the burner head 26 and is ignited by the igniter 30 to form a combustion flame. Other air is connected to the vaporization chambers 21a and 21b of the burner head 26 through the gap (secondary air path) between the main body case 32 and the carburetor cover 25 and the gap (secondary air path) between the main body case 32 and the burner case 26a. It reaches the side opposite to the part, flows in from the opening 28b of the secondary air port 28, and is ejected from the small holes on the upper surface to promote combustion.

Here, from the vaporizer 21 to the burner head 26
Since the passage of the premixed gas to the left and right is divided by the partition portion 29a of the mixing chamber 29, the fuel pump 24a,
24b, nozzles 23a and 23b, vaporization chambers 21a and 21
When viewed in the longitudinal direction of the burner head 26, the combustion block composed of b, the mixing chamber 29, and the burner head 26 has independent left and right functions, and when the fuel pump 24a on the right side is stopped, Only one of the combustion blocks can burn.

Further, the air supplied from the blower 31 into the main body case 32 is divided into left and right by the partition plate 33 at the inlet portion 32a, and the vaporization chambers 21a and 21b are independently provided.
It is supplied to the combustion section from the secondary air port section 28 through the inner and left and right gaps (secondary air passage 34).

Further, when air is supplied to the combustion path, the air supplied from the blower 31 flows in from the inlet of the main body case 32, and a large amount of air once collides with the outer surface of the carburetor cover 25 and changes its direction to change its direction. Which flows into the carburetor 21 from the inlet of the carburetor, the carburetor cover 25 and the main body case 32.
And the air flowing to the downstream secondary air inlet 28b side through the gap between the two. And in the prior art, the main body case 3
Since the dynamic pressure of the air is high near the inlet of 2, it is extremely difficult to evenly divide the air that collides with the carburetor cover 25 into the left and right, and a large amount of air is supplied to one side or the air fluctuates in the left and right directions and vaporizes. It was difficult to supply a stable amount of air to the inside of the container 21 and the secondary air path. In addition, there is a problem that if the resistance changes in one of the flow paths for some reason because the air inlet is in communication, the amount of the other air also changes.

According to the structure of the present invention, the main body case 32 and the carburetor cover 25 are attached to the air inlet portion 32a of the main body case 32.
Since the partition plate 33 is provided so as to divide the gap between the left and right sides, the air supplied into the main body case 32 is separated by the partition plate 3.
It is divided into left and right at 3 and supplied evenly, and stable air supply is possible without affecting each other, and a stable combustion state can always be maintained.

[0014]

As described above, according to the combustion apparatus of the present invention, the following effects can be obtained.

Since the partition plate is provided so as to divide the gap between the main body case and the carburetor cover of the air inlet portion of the main body case into the left and right, the following effects are obtained. (1) Since the air required for combustion is independently supplied to the two left and right paths, it can be uniformly supplied to each path, and a uniform combustion state can be obtained. (2) Since the air required for combustion is independently supplied to the two left and right paths, a stable combustion state can be maintained without the fluctuation of the air amount of one affecting the other.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a main part of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the main part of the combustion device.

FIG. 3 is a plan sectional view of a main part of a conventional combustion device.

FIG. 4 is a front sectional view of the main part of the combustion device.

[Explanation of symbols]

 21 vaporizers 21a and 21b vaporization chamber 26 burner head 29 mixing chamber 31 blower 32 main body case 32a air inlet 33 partition plate

Claims (1)

[Claims] 1. A vaporizer having a burner head in which flame openings and secondary air portions are alternately arranged and whose outer periphery is covered with a burner case, and two independent vaporization chambers connected to one end of the burner head. And a vaporizer cover that covers the vaporizer, a bottomed box-shaped mixing chamber that covers the vaporizer and the lower surface of the burner head to form two independent gas passages from the vaporizer to the burner head, and the vaporizer And a main body case that covers the burner head and the mixing chamber, is connected to the main body case, and supplies air to the secondary air portion through the vaporizer and the vaporizer cover, and the gap between the burner case and the main body case. A blower,
A combustion device comprising a partition plate at an air inlet portion of the main body case, which divides a gap between the main body case and the carburetor cover into right and left in the air flow direction.