JPH0561522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a combustor that prevents resonance noise caused by oscillatory combustion.

(Prior Art) Conventionally, a combustion chamber is a closed type combustion chamber that is equipped with a combustion chamber that covers the combustion surface of an all-primary air burner that is integrally equipped with a blower that supplies combustion air, and that the combustion chamber communicates with the outside only through an exhaust port. A combustor is known in which a combustor body is housed in an outer casing.

(Problems to be Solved by the Invention) This type of combustor performs oscillatory combustion due to pressure fluctuations when the air is ejected into the combustion chamber and rapid volume changes during combustion.

This vibrational energy flows back through the burner's flame port from the blower's outlet to the suction port, and in the conventional system described above, this backflowing vibrational energy is further reflected by the wall of the combustor body, and then flows back through the blower. Since the vibration is fed back to the burner, the vibrational combustion of the burner is amplified, which causes resonance noise, which is undesirable because it causes discomfort.

The object of the present invention is to obtain a combustor free of such defects.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a combustion chamber that covers the combustion surface of an all-primary air burner that is integrally equipped with a blower that supplies combustion air. The combustor main body, which is a closed type in which the chamber communicates with the outside only through the exhaust port, is housed in an outer casing, and a part of the outer casing facing the air intake port of the blower is provided with a vibration energy release device. It consists of a through hole.

(Function) By having the above configuration, the present invention allows the vibration energy generated during combustion of the burner to be released to the outside from the through hole of the combustor main body via the flame port of the burner and the blower. Unlike conventional burners, vibration energy is not fed back to the burner, and resonance noise does not occur.

(Example) Next, an example in which the present invention is applied to a gas water heater will be described with reference to the drawings.

In the drawing, 1 indicates an all-primary air burner 3 and its combustion surface 4, which is integrally equipped with a blower 2 that supplies combustion air.
The combustor main body includes a combustion chamber 5 that covers the combustor main body 1, and the combustion chamber 5 communicates with the outside only through an exhaust port 6, and 7 indicates an outer casing that houses the combustor main body 1.

A heat exchanger 9 heated by the burner 3 was provided in the combustion chamber 5.

Reference numeral 10 indicates a gas supply path, and a nozzle portion 10a at the tip of the gas supply path 10 is connected to an intake port 2a of the blower 2.
Gas was supplied to the burner 3 at the same time. In the water heater configured as described above, the blower 2 is rotated and a desired amount of air-fuel mixture is sent to the burner 3 by the drive of various control devices accompanying the ignition operation.
is ignited, and the water supply pipe 11 on the upstream side of the heat exchanger 9
The water sent from the combustion chamber 5 is heated in the heat exchanger 9, and hot water at a desired temperature is supplied from the outlet pipe 12 on the downstream side of the heat exchanger 9, and the combustion exhaust in the combustion chamber 5 is discharged from the exhaust port 6. It is released outside the outer casing 7.

Here, the present invention provides a through hole 13 for releasing vibration energy in a portion of the outer casing 7 facing the intake port 2a of the blower 2, so that when the burner 3 burns, the combustion plate 3a provided in the burner 3 is Vibration energy passing through the flame hole 3b and directed from the discharge port 2b of the blower 2 toward the suction port 2a is released from the through hole 13 to the outside to prevent unpleasant resonance noise from occurring.

Note that the through hole 13 may also serve as an intake port of the outer casing 7.

Furthermore, in the illustrated embodiment, if a sound absorbing material is applied to the upper wall surface 5a of the combustion chamber 5, the vibration energy will be attenuated thereby, which is more effective.

(Effects of the Invention) According to the present invention, a through hole for releasing vibrational energy is provided in a portion of the outer casing that faces the air intake port of the blower, so that when the burner burns, the air blower can be removed from the air intake port of the blower. Vibration energy that comes out can be released to the outside through the through hole, and the vibration energy is no longer fed back to the burner, which is the case with conventional burners, preventing the generation of resonance noise and making it more comfortable to use. It has very good effects.

[Brief explanation of the drawing]

The drawing is a cut-away side view showing an example of implementation when the present invention is applied to a gas water heater. 1...Combustor body, 2...Blower, 2a...Air port, 3...Total primary air, 4...Combustion surface, 5...
Combustion chamber, 6...exhaust port, 7...outer casing, 13...through hole.

Claims (1)

[Claims] 1. A combustion chamber that covers the combustion surface of an all-primary air burner that is integrally equipped with a blower that supplies combustion air, and the combustion chamber communicates with the outside only through an exhaust port. A combustor housed in a combustor, the combustor being provided with a through hole for releasing vibrational energy at a location of the outer casing facing the intake port of the blower.