JPS593659B2 - Nenshiyousouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In a generally known hot water boiler or hot air furnace in which the part to which the combustion device is attached has a structure that does not allow heat exchange, conventionally, in order to protect various parts of the combustion device from heat, As shown in the figure, a refractory material or a heat insulating material 1 was attached to a portion C of the combustion device B.

However, these methods had many problems, such as poor durability, high costs, and continuous operation for long periods of time would transmit a large amount of heat and cause the temperature of various parts of the combustion equipment to rise abnormally. .

The present invention aims to provide a combustion apparatus characterized in that various parts of the combustion apparatus can be kept away from heat for a long time, and the combustion apparatus has a mounting part that has good durability and is low in cost. .

An embodiment of the present invention will be explained based on FIGS. 2 and 3. 2 is a wind box with a section for mounting the burner 13;
It also has the function of a lid for combustion chamber 3.

A spiral partition wall 5 is provided inside the wind box 3, and a spiral air flow path 4 is formed by the partition wall 5.

Further, a combustion air fan 9 is connected to the outside of the airflow passage 4, and a burner 13 is connected to the center thereof, and the burner 13 faces into the combustion chamber 3 through the central opening 6.

Further, one side of the wind box 3 has an oil pipe hole 8 for mounting and fixing the oil pipe 7, and a communication hole 10 for communicating the combustion air fan 9 and the air flow passage 4. .

An air cone 11 is attached to this opening 6, and an air stirring device 12 is attached thereon.

A burner (spray nozzle) 13 is disposed in the center of the air agitation device 12 via an oil feed pipe 6 communicating with an oil pressurizing device (not shown).

A combustion flame 14 is held at the front end of this burner (spray nozzle) 13, and a combustion chamber wall 15 fixed to the wind box 2 is disposed to surround it.

16 is an inner wall of the boiler, 17 is an outer wall of the boiler, 18 is a boiler water chamber, and 19 is an exhaust path.

In the above combustion device, the combustion air sent from the combustion air fan 9 passes through the air flow passage 4 via the conduction hole 10, reaches the air disturbance device 12, and passes through the air cone 11 into the combustion chamber 3. to go into.

At this time, it is mixed with liquid fuel sprayed from a burner (spray nozzle) 13 via an oil pressure device (not shown) and an oil feed pipe 7, and is ignited by an ignition device (not shown) to form a combustion flame 14. do.

The combustion exhaust gas generated by this combustion flame 14 flows as shown by the arrow and is discharged from the exhaust pipe 19, and in the process, it exchanges heat with water in the boiler water chamber 18 via the boiler inner wall 16.

On the other hand, the wind box 2 forming the lid is heated by the radiant heat of this combustion exhaust gas.

However, since combustion air flows inside the wind box 2 and absorbs heat from the bottom plate 2a, no abnormal temperature rise occurs.

As can be seen from the above embodiments, in the present invention, the non-heat exchange part of the combustion chamber is covered with a wind box, and a spiral partition wall is provided in the wind box to form a spiral air flow passage. Combustion air is sent into the passage from the outside from a combustion air fan, and this air is supplied into the combustion chamber from the burner section in the center, so the air cools the metal surface inside the wind box, and As the air, which has become hot due to this cooling, is supplied to the burner section while swirling, the degree of mixing of fuel and air in the burner section is good, and the combustion state thereof is also very good.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a conventional example of a combustion device, FIG. 2 is a longitudinal sectional view showing an embodiment of the apparatus of the present invention, and FIG. 3 is a sectional view taken along line AA in FIG. 2. 2... Wind box, 4... Air flow path, B.
... Combustion device.

Claims (1)

[Claims] 1. A combustion chamber in which at least a part of the outer peripheral surface is a non-heat exchange part, a wind box that covers the non-heat exchange part of the combustion chamber, and a burner that faces the combustion chamber from the center of the wind box. A spiral partition wall forming a spiral air flow passage is provided in the wind box, a combustion air fan is connected to the outside of the spiral air flow passage, and the burner is installed in the center of the wind box. A combustion device that connects