JPH0590151U - Abnormal combustion prevention structure of burner - Google Patents

Abstract

(57) [Summary] [Purpose] A flame detection device used in a burner detects abnormal wind pressure due to blower failure and prevents abnormal combustion. [Structure] A flame detection device 6 for detecting a combustion flame of a burner A is provided in the middle of the blower pipe 2, and a damper 7 which is rotated by the force of a spring 8 is provided between the burner A and the flame detection device 6. When the wind pressure is normal, the damper 7 rotates because the spring 8 loses the wind pressure, and the flame detection device 6 desires the burner A to detect abnormal combustion. Further, in the event of a wind pressure abnormality such as a decrease in the air flowing through the blower pipe 2, the damper 7 is moved in front of the flame detection device 6 by the spring 8 to provide a multifunctional burner abnormal combustion prevention structure that also detects an abnormal wind pressure. It is a thing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a burner that compulsorily sends combustion air and stops the combustion when an abnormal air flow is detected.

[0002]

[Prior Art]

 Conventionally, the forced air supply type burner is known as a pressure atomization type burner.When the combustion air is insufficient, a wind pressure switch is installed at the blower port or blower pipe of the blower. Combustion was forcibly stopped.

[0003]

[Problems to be solved by the device]

 This type of pressure spray burner is equipped with a flame detection device made of CdS, etc. at a position where it can detect the flame of the burner. Combustion control is performed depending on the presence or absence of flame detection. Combustion control method is used by using, and it was expensive because it required multiple safety devices.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention controls combustion by detecting the presence or absence of a flame and a decrease in wind pressure with a single flame detecting device that has been conventionally used. That is, in the pressure spray type burner including the burner A formed by the stabilizer 3, the spray nozzle 4, the ignition electrode 5 and the like in the blower pipe 2 to which the combustion air is sent from the blower 1, the blower pipe 2 is A burner comprising a flame detection device 6 for detecting the combustion flame of the burner A, and a damper 7 between the burner A and the flame detection device 6 for opening and closing the light receiving surface for the flame detection device 6 by wind pressure. It has an abnormal combustion prevention structure.

Further, if a damper 7 that is rotatably provided close to the flame detection device 6 is provided with a spring 8 that loses the normal wind pressure of the blower 1 and wins when the wind pressure decreases, The light receiving portion can be easily opened and closed.

[0006]

[Action]

 The operation of the present invention will be described. When the blower 1 is rotated and air is blown into the blower tube 2, the air blows around the spray nozzle 4 and the stabilizer 3 into the combustion chamber in front of the burner A. is there. On the other hand, the fuel pressurized by the electromagnetic pump or the like blows out from the spray nozzle 4 in the form of mist, is ignited by the spark discharge of the ignition electrode 5, is mixed with the air sent from the blower 1, and starts combustion. It is a thing.

Therefore, to determine whether or not the combustion is normally performed, the flame detection device 6 provided in the middle of the blower pipe 2 detects the presence or absence of the flame, and outputs a signal to continue or stop the combustion. It is something that is emitted. In the unlikely event that an abnormality occurs in the blower 1 or the blower pipe 2 and the combustion air pressure drops, the damper 7 shuts off the detection part of the flame detection device 6 and sends a signal to stop combustion. is there.

[0008]

【Example】

 The configuration will be described below with reference to the drawings showing the embodiments. 1 is a blower forcibly sending combustion air, 2 is a blower pipe to which combustion air is supplied from the blower 1, and 3 is provided in the blower pipe 2. It is a stabilizer and is located in an inner cylinder 2a that is concentrically provided in the blower pipe 2. Reference numeral 4 denotes a spray nozzle mounted in the central opening of the stabilizer 3 and reference numeral 5 denotes an ignition electrode having a tip positioned between the stabilizer 3 and the spray nozzle 4.

6 is a flame detection device (an optical sensor made of CdS or the like) located in the middle of the blower pipe 2 behind the stabilizer 3 to detect the combustion flame of the burner A, and 7 is the stabilizer 3 and the flame detection device 6. A damper 8 is provided in the middle of the damper 7, and a spring 8 is attached to the damper 7. For this reason, when the wind pressure of the combustion air passing through the blower pipe 2 is normal, the damper 7 rotates due to the spring 8 losing the wind pressure to open the front of the flame detection device 6. On the other hand, when the wind pressure of the combustion air drops, the spring 8 overcomes the wind pressure and raises the damper 7, thereby closing the front of the flame detection device 6.

[0010]

[Effect of the device]

 In the present invention having the above-described configuration and operation, the flame detection device 6 is provided in the middle of the blower pipe 2, so that the burner A is constantly cooled by the combustion air during operation, which impairs the durability of the flame detection device 6. Since the combustion state of burner A can be monitored linearly, if the combustion state is abnormal, the combustion can be stopped immediately and the structure is safe.

Further, since the damper 7 is provided between the burner A and the flame detection device 6, if the wind pressure of the combustion air is normal, the damper 7 is pushed by the wind pressure and the flame detection device 6 and the burner A are separated. In the meantime, the obstacle disappears and normal combustion continues.

On the other hand, when the blower 1 is out of order or when foreign matter is mixed in the blower path to affect the wind speed, the damper 7 blocks the front of the flame detection device 6 and the burner A cannot be seen. The intelligence device 6 senses an abnormality in the wind pressure and stops the combustion, which is convenient for dealing with two types of abnormality, an abnormality in the combustion and an abnormality in the wind pressure.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

[Explanation of symbols]

 1 Blower 2 Blower Pipe 3 Stabilizer 4 Spray Nozzle 5 Ignition Electrode 6 Flame Detecting Device 7 Damper 8 Spring A Burner

Claims (2)

[Scope of utility model registration request] 1. A pressure spray type burner comprising a burner A formed by a stabilizer 3, a spray nozzle 4, an ignition electrode 5 and the like in a blower pipe 2 to which combustion air is sent from a blower 1. A burner provided with a flame detection device 6 for detecting the combustion flame of the burner A, and a damper 7 between the burner A and the flame detection device 6 for opening and closing a light receiving surface for the flame detection device 6 by wind pressure. Abnormal combustion prevention structure. 2. A damper 7 rotatably provided close to the flame detection device 6 has a spring 8 that loses the normal wind pressure of the blower 1 and wins when the wind pressure decreases. Abnormal combustion prevention device for the burner described.