JP2003262331A - Combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device capable of easily preventing generation of abnormal sound and pulsating combustion due to pressure rise at the time of ignition with simple composition and at a low cost. <P>SOLUTION: The device is equipped with a burner 1 instantaneously igniting such as petroleum gasification burner and a gun type burner, a combustion fan 3 supplying a combustion air into the burner 1 and an air chamber 17 consisting of an air room where the combustion gas of the burner 1 is at least forcedly exhausted to the outside, and an inlet 18 communicating the combustion fan 3 and an exit outlet 19 communicating the burner 1 are not arranged on a straight line in the middle of an air supply route 4 connecting the burner 1 and the combustion fan 3. Since an amount of pressure rise generated at the time of ignition of the burner is instantaneously absorbed in the air chamber 17, the abnormal sound and the pulsating combustion at the time of ignition can be securely prevented with the simple composition where the air chamber 17 consisting of the air room is only installed in the middle of the air supply route 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater and an FF type warm air heater having a burner such as a gas burner, a petroleum gasification burner, a gun type burner, etc. that instantly ignites. is there.

[0002]

2. Description of the Related Art Heretofore, in this type, as disclosed in, for example, Japanese Utility Model Publication No. 62-29800, a combustion gas passage of a burner and an intake side of a combustion fan are connected by a bypass passage. However, by installing a valve device that opens at the time of ignition in this bypass path, the instantaneous pressure increase that occurs in the burner at the time of ignition is mitigated by making it the same pressure state, and abnormalities at ignition that occur due to this pressure increase. It was intended to prevent sound and pulsating combustion.

[0003]

By the way, in this conventional device, a large space is required for installing the bypass passage,
There is a problem that the entire equipment becomes large in size, and it is necessary to control the valve device and the valve device to move only for ignition, and further, in normal combustion, the combustion gas must be prevented from leaking to the intake side. However, there is a problem in that a sealing means having a high degree of sealing and high temperature resistance is required, which is expensive in terms of structure and control and causes a cost increase.

[0004]

The present invention focuses on this point and solves the above-mentioned problems. Therefore, in claim 1, a burner such as a petroleum gasification burner or a gun type burner is provided which is capable of instantaneous ignition. A combustion fan that supplies combustion air to the burner, and a combustion gas of the burner that is at least forcibly exhausted to the outside, in the air blowing path connecting the burner and the combustion fan. Has an air chamber which is composed of an air chamber in which an inlet communicating with the combustion fan and an outlet communicating with the burner are not arranged in a straight line.

As a result, the amount of increase in pressure generated when the burner is ignited flows into the air chamber from the outlet,
Since it cannot be removed from the inlet and is instantly absorbed in the air chamber, it does not hinder the supply of the next combustion air. With an extremely simple structure that only provides an air chamber consisting of chambers, it is possible to reliably prevent abnormal noise and pulsating combustion at ignition, and it is possible to make the equipment compact without taking space and special control It is inexpensive because parts and components are not needed and there is no need to worry about cost increase.

Further, in claim 2, a burner such as a petroleum gasification burner or a gun type burner which is ignited instantaneously, a combustion fan for supplying combustion air to the burner, and the burner are provided. In the case where the combustion gas is at least forcibly exhausted outdoors, the angle between the inlet communicating with the combustion fan and the outlet communicating with the burner is provided in the middle of the blowing path connecting the burner and the combustion fan. It is provided with an air-chamber consisting of an air chamber which is shifted. .

As a result, the amount of increase in pressure generated when the burner is ignited also flows into the air chamber from the outlet, but the angle is different, though it is on a straight line, and cannot be removed from the inlet. Since it is absorbed instantly in the air, it does not hinder the supply of the next combustion air, so combustion continues as it is, and it is extremely easy to provide an air chamber consisting of an air chamber in the air blowing path. With a simple structure, abnormal noise at igniting and pulsating combustion can be reliably prevented, the equipment can be made compact without taking up space, and special control and parts are not required, so it is cheap and cost is increased. There is no worry.

Since one side wall of the air chamber is composed of a burner support for supporting the burner, the number of parts is further reduced and the cost is low, and the burner support is also used for cooling. It is possible to obtain a reliable cooling action.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a combustion apparatus according to the present invention will be described based on an embodiment shown in the drawings. Reference numeral 1 denotes a petroleum gasification type burner in which a heating heater 2 is cast, and combustion air supplied from a combustion fan 3 through a blower path 4 and pressure fed from an electromagnetic pump (not shown). The fuel oil sprayed from the spray nozzle 5 is premixed and burned in the burner head portion 6. Since it is a gasification system, it is instantly ignited by ignition of an igniter (not shown). Is. Reference numeral 7 denotes a burner support table that supports the burner 1 in a suspended manner.

Reference numeral 8 is a combustion cylinder provided with the above-mentioned burner 1 on the lower side, and a heat exchanger 10 composed of a plurality of pipes is provided on the upper side with a heat collecting section 9 provided on the uppermost side. The indoor air blown by a warm air fan (not shown) composed of such a cross flow fan and the combustion gas are heat-exchanged and supplied as warm air to the room for warm air heating.

Reference numeral 11 denotes an exhaust pipe for exhausting combustion gas which has passed through the heat exchanger 10 and whose temperature has dropped. The exhaust pipe 1 has an intake / exhaust cylinder 13 having a double cylinder structure with an intake / exhaust hole 12 at the tip protruding to the outside.
4, the combustion gas after heat exchange is exhausted to the outside, and an air supply pipe 16 communicating with the combustion fan 3 is connected to the air supply unit 15 to burn the outdoor air as combustion air. 1 is supplied.

Reference numeral 17 denotes an air chamber provided at a substantially intermediate position of an air blowing path 4 connecting the burner 1 and the combustion fan 3, which is an inlet 18 for blowing air from the combustion fan 3 and an outlet for the burner 1. 19 is composed of an air chamber which is not arranged in a straight line, so that even if an increase in pressure due to ignition of the burner 1 flows in from the outlet 19, it does not immediately escape from the inlet 18 and is absorbed therein. Is what you are doing.

Next, the operation of the embodiment of the present invention will be described. When the operation switch (not shown) is pressed, the heating heater 2 is energized to start the preheating of the burner 1 and the vaporizable temperature of the fuel oil is reached. When the fuel oil is sprayed from the spray nozzle 5 and becomes a premixed gas in the burner 1 and is appropriately ignited by an igniter, instantaneous ignition occurs and the amount of pressure increase at this time is the heat collecting portion. 9 and the heat exchanger 10 do not flow to the exhaust side, which has a large resistance, but to the air supply side via the burner 1.

The amount of increase in pressure flowing to the air supply side is
Although it flows in from the outlet 19 of the chamber 17, it is an air chamber having a certain volume because it does not immediately escape because it is not arranged in a straight line with the inlet 18 which is the other opening. The amount of rise is absorbed and the normal supply of combustion air continues, and the burner 1 also continues from ignition to normal combustion.

Next, the combustion gas generated by the combustion of the burner 1 flows through the combustion cylinder 8, the heat collecting section 9, and the heat exchanger 10, and exchanges heat with the air blown from the convection fan to produce warm air. This heats the interior of the room, and the combustion gas that has undergone heat exchange and whose temperature has dropped is exhausted to the outside through the supply / exhaust pipe 13.

Therefore, by providing the air chamber 17, it is possible to surely absorb the pressure rise at the time of ignition and to prevent abnormal noise and pulsating combustion with an extremely simple structure, which is inexpensive and costly. There is no need to worry.

Next, the embodiment of claim 2 will be described with reference to FIG. 3 (the same parts are designated by the same reference numerals).
9 is on a straight line, but since the angle of the outlet 19 is obliquely downward, the amount of increase in the pressure flowing from the outlet 19 does not directly flow out from the inlet 18 and the air chamber 17
The amount of increase in pressure is instantaneously absorbed here, and the same effect as that of changing the arrangement of the inlet and the outlet while avoiding the straight line described above can be obtained.

Next, the embodiment of claim 3 will be described with reference to FIG. 4 (the same parts are designated by the same reference numerals).
One side wall of the burner support 7 on the side of the inlet 18 is formed by a part of the burner support base 7. By this, the number of parts can be reduced by one and the cost can be reduced, and the cost can be reduced. The burner support 3 is surely cooled by the air blown from the combustion fan 3.

In this embodiment, the petroleum gasification burner has been described as an example, but the present invention is not limited to this, and the same effect can be obtained with a gun type burner, for example.

[0020]

As described above, according to the present invention, the increase in pressure generated when the burner is ignited flows into the air chamber from the outlet, but is instantaneously absorbed in the air chamber. , With an extremely simple structure that only an air chamber consisting of an air chamber is provided in the air passage, it is possible to reliably prevent abnormal noise and pulsating combustion at ignition, and save space and make the equipment compact. In addition to being measurable, it does not require special controls or parts and is inexpensive, so there is no need to worry about cost increases.

In the second aspect of the invention, the amount of increase in pressure generated when the burner is ignited also flows into the air chamber from the outlet, but the angle is different, though it is on a straight line, and cannot be removed from the inlet. Since it is instantly absorbed in the air chamber, it is possible to reliably prevent abnormal noise and pulsating combustion at the time of ignition with an extremely simple structure that only an air chamber consisting of an air chamber is provided in the air blowing path. The equipment can be made compact without taking a space, and special control and parts are not required, which is inexpensive and there is no fear of cost increase.

According to the third aspect of the present invention, the number of parts is further reduced, the cost is reduced, and the burner support table can also be used for cooling, so that a reliable cooling action can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the air-chamber.

FIG. 3 is a schematic configuration diagram showing another air chamber.

FIG. 4 is a schematic configuration diagram of a main part showing the configuration of still another air chamber.

[Explanation of symbols]

1 burner 3 combustion fan 4 Blower route 7 Burner support 17 Air-chamber 18 entrance 19 exit

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3K023 BA01 BA11 BA13                 3K052 GA03 GC01                 3K055 AA03 AB04 AB06 BB03

Claims (3)

[Claims] 1. A burner, such as a petroleum gasification burner or a gun type burner, which instantly ignites, a combustion fan which supplies combustion air to the burner, and a combustion gas of the burner. In the case where the air is forcibly exhausted to the outside, an inlet communicating with the combustion fan and an outlet communicating with the burner are arranged in a straight line in the middle of the blowing path connecting the burner and the combustion fan. A combustion apparatus having an air chamber composed of an air chamber that does not exist. 2. A burner such as a petroleum gasification burner or a gun type burner which is instantly ignited, a combustion fan which supplies combustion air to the burner, and a combustion gas of the burner. In the case where the air is forcedly exhausted to the outside, in the middle of the air blowing path connecting the burner and the combustion fan, air with an angle shifted between the inlet communicating with the combustion fan and the outlet communicating with the burner A combustion device characterized by having an air chamber composed of a chamber. 3. A combustion apparatus according to claim 1 or 2, wherein one side wall of said air chamber is constituted by a burner support for supporting a burner.