JPH0518569Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid fuel spray burner used in hot water boilers and the like.

[Conventional technology]

This type of liquid fuel spray burner is a burner for domestic water heaters, such as those in buildings commonly called condominiums, and it uses kerosene as fuel, which significantly reduces costs compared to using gas. However, since the burner is installed on a narrow balcony, it is required to be small, lightweight, and produce low combustion noise. In order to meet this demand, the present applicant has developed a liquid fuel spray burner. Referring to Figure 5, it is
A first cylindrical body 33 equipped with a liquid spray nozzle 31 is provided with a flame stabilizing plate 36 having a central hole 34 and a recovery blade 35 in front of the nozzle opening 32, and a first rear air hole 37 in the rear thereof. an end plate 38;
The fuel spray chamber 39 is formed by a second cylindrical body 40 having a plurality of first air holes 41 around the front side of the flame stabilizing plate 36 and a plurality of second air holes around the outer periphery of the first cylindrical body 33. A second end plate 43 having a hole 42 forms a mixed fuel chamber 44 between a third cylinder body 45 and a second end plate 43.
and a third end plate 47 having a plurality of second rear air holes 46 on the outer periphery of the first cylinder 33 and a pressure adjustment chamber 48, a second cylinder 40, a third cylinder 45, Fourth
The cylindrical body 49, the first end plate 38, and the third end plate 47 each constitute a ventilation passage 53, and the fourth cylindrical body 49 is connected to a blower 52 via an air passage 50, and the fourth cylindrical body 49 is connected to a blower 52 through an air passage 50, and It is characterized by having a configuration in which primary air and secondary air are adjusted and supplied. In this burner, combustion air is sent uniformly around the entire circumference of the flame-holding plate, and in order to make the flame uniform and stable, there is a sufficient distance between the flame-holding plate and the combustion air outlet of the blower. The purpose of achieving efficient combustion is achieved by ensuring a sufficient cross-sectional area of the road and by bending the wind channel.

[The problem that the idea aims to solve]

Although the intended purpose was achieved with the burner described above, it was necessary to maintain a sufficient distance between the flame-holding plate and the combustion air outlet of the blower, to ensure a sufficient cross-sectional area of the air passage, and to close the air passage. Since the burner is bent, it not only increases the air volume and wind pressure loss, but also makes it impossible to make the entire burner compact, and furthermore, the structure becomes complicated, making it difficult to reduce manufacturing costs. It turns out that there is something.

Therefore, the present invention was developed in view of the above-mentioned facts, and it is a liquid fuel that shortens the distance between the blower outlet and the flame-holding plate, and is capable of uniformizing and stabilizing the flame despite its simple structure. The purpose is to provide a spray burner.

[Means to solve the problem]

The above problem is solved by a burner casing 1 that supports a liquid fuel spray nozzle 2 in the center and is provided with a combustion air inlet 9 that takes in combustion air from around the nozzle.
A nozzle adapter 3 with a tip nozzle 2 attached thereto and a rectifying plate 14 are coaxially attached to the center of the rectifying plate 14, and the rectifying plate 14 has a plurality of outer air holes 16 along its periphery.
A plurality of inner air holes 16 are provided concentrically with the outer air hole 16, and the nozzle 2
There is a flame holding plate 20 and a draft tube 2 in front of the
1 is provided, and a blower 7 is directly connected to the burner casing 1. Combustion air supplied through the combustion air inlet 9 flows to the outside of the flame stabilizing plate 20 through the outer air hole 16, and also to the inside. air hole 16
A liquid fuel atomizing burner characterized in that the liquid fuel flows through the nozzle 2 and is uniformly rectified without deviation.

[Effect]

With this configuration, the nozzle adapter 3 is integrally installed on the central axis of the burner casing 1 while maintaining its center across the rectifying plate 14, and the blower 7 is also directly installed on the burner casing 1. This increases dimensional accuracy, reduces air volume and wind pressure loss, and allows the combustion air to be sent uniformly to the flame-holding plate, making the flame uniform and stable.As it is easy to assemble, manufacturing costs are also low. The entire burner can be made compact.

[Embodiments] Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.

In FIGS. 1 to 4, reference numeral 1 denotes a burner casing, which has a nozzle adapter attachment part 4 in its center for fixing a nozzle adapter 3 to which a nozzle 2 is attached, and the nozzle adapter attachment part 4 is supported by support legs 5. ing.

A nozzle adapter fixing hole 6 for fixing the nozzle adapter 3 is formed in the nozzle adapter mounting part 4, and around the nozzle adapter mounting part 4, the opening size is approximately equal to the opening size of the air outlet 8 of the blower 7 that sends combustion air. A combustion air inlet 9 is provided.

10 is a blower mounting surface of the burner casing, and a blower fixing screw hole 11 for fixing the blower 7 is provided therein.

12 is a flange of the burner casing, and a burner casing fixing screw hole 13 for fixing the burner casing is provided therein. In this embodiment, the burner casing 1 is made of die-cast aluminum with a wall thickness of approximately 3 mm.
Manufactured in one piece.

Reference numeral 14 denotes a current plate, which has a nozzle adapter fixing hole 6, a current plate fixing hole 15 with a pitch, and a plurality of air holes 16 so that the nozzle adapter 3 is centered. Referring to FIG. 3, which is a plan view of the current plate 14, the current plate 14 has a plurality of outer air holes 16 along its periphery, and the outer air holes 16.
A plurality of inner air holes 16 are formed substantially concentrically with the outer air holes 16 inside the array. By providing a large number of such air holes 16, the current plate 14 directs the combustion air supplied through the combustion air inlet 9 to the outside of the flame stabilizing plate 20 through the outer air holes 16. The combustion air flows through the inner air hole 16 toward the nozzle 2, thereby uniformly rectifying the combustion air without deviation.

In this example, the rectifying plate 14 was manufactured by pressing a 0.6 mm iron plate. The nozzle adapter 3 to which the nozzle 2 is attached is fixed to the burner casing 1 with screws 17 across the rectifying plate 14, and the blower 7 is fixed to the burner casing 1 with screws 18.

The burner casing 1 sandwiches the burner base 19 and is integrally fixed to a draft tube 21 having a flame stabilizing plate 20 with screws (not shown). 22 is an air passage, 23 is an oil pipe, and 24 is an ignition electrode.

Next, the operation of the device configured as described above will be explained. When the blower 7 is driven, combustion air passes through the air duct 22, passes through the air outlet 8 and the combustion air inlet 9, hits the baffle plate 14, and is diffused into the air holes 16.
It passes through the gap between the rectifying plate 14 and the outer peripheral burner casing 1, passes through the draft tube 21, and is sent to the flame stabilizing plate 20. When the pump P is driven to spray fuel from the nozzle 2 and the fuel is ignited by the ignition electrode 24, the flame is held in rotation by the flame holding plate 20, mixed with combustion air, and becomes a flame and burns.

Here, since the nozzle 2, the current plate 14, and the combustion air inlet 9 are installed on the central axis of the burner casing 1, the combustion air sent to the flame stabilizing plate 20 is uniformly supplied on the circumference, and the flame is homogenized and stabilized. Further, since the air passage 22 is extremely short and has no bends, there is little loss in air volume and wind pressure, and the entire structure can be made compact, and at the same time, assembly is simple and manufacturing costs can be reduced.

Incidentally, the outer diameter of the baffle plate 14 may be approximately matched to the inner diameter of the burner casing 1 so that there is almost no gap, and the combustion air may be supplied only from the air holes 16.

[Effect of idea]

As described above, according to the present invention, the dimensional accuracy of the nozzle adapter, blower, and burner casing is improved, the air volume and wind pressure loss are reduced, the flame is made uniform and stable, and the cost is reduced. This is effective in downsizing the entire burner.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the internal structure of one embodiment of the present invention, Fig. 2 is a rear view of the burner casing 1, and Fig. 3 is a rear view of the burner casing 1.
The figure is a plan view of the rectifying plate 14, FIG. 4 is a detailed view around the nozzle adapter mounting portion 4, and FIG. 5 is a longitudinal sectional view of the liquid fuel spray burner developed by the applicant. In the figure, 1 is the burner casing, 2 is the nozzle, and 3
is a nozzle adapter, 4 is a nozzle adapter mounting part, 5 is a support leg, 6 is a nozzle adapter fixing hole,
7 is a blower, 8 is a blower outlet, 9 is a combustion air inlet,
10 is the blower mounting surface, 11 is the blower fixing screw hole,
12 is a flange, 13 is a burner casing fixing screw hole, 14 is a rectifier plate, 15 is a rectifier plate fixing hole, 16
17 is an air hole, 17 is a screw, 18 is a screw, 19 is a burner base, 20 is a flame holding plate, 21 is a draft tube, 22 is an air passage, 23 is an oil pipe, and 24 is an ignition electrode.

Claims (1)

[Claims for Utility Model Registration] A nozzle in which a tip nozzle 2 is attached to the center of a burner casing 1 which supports a liquid fuel spray nozzle 2 in the center and is provided with a combustion air inlet 9 that takes in combustion air from around the nozzle. The adapter 3 and the rectifier plate 14 are installed coaxially, and the rectifier plate 14 has a plurality of outer air holes 16 along its periphery and a plurality of inner air holes 16 arranged concentrically with the outer air holes 16. A flame stabilizing plate 20 and a draft tube 21 are provided in front of the nozzle 2, and a blower 7 is directly connected to the burner casing 1, so that combustion air is supplied through the combustion air inlet 9. A liquid fuel spray burner characterized in that the flow passes through the outer air holes 16 to the outside of the flame stabilizing plate 20, and also flows towards the nozzle 2 through the inner air holes 16, and is uniformly rectified without deviation. .