JP2712315B2 - Gas water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas water heater realizing miniaturization and low noise.

2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, a gas water heater has a blower 1 for supplying combustion air, a gas control device 2 for supplying flammable gas, and a mixture of flammable gas and air for combustion. The combustion chamber 5 was provided with a burner section 3 for performing heat, a heat exchanger 4 for transferring heat during combustion to water, and an exhaust port 6 for discharging burned exhaust gas to the outside of the apparatus. 7 is a water pipe, 8 is a gas pipe,
Reference numeral 9 denotes a flame, and the arrows in the figure indicate flows of air and mixed air.

Here, the gas is mixed with a part of the air supplied from the blower in the mixed air passage 10 and is ejected from the opening of the opening plate 11. The air is supplied from a blower provided at the bottom end of the burner, passes through a secondary air passage 12, and flows out of an air hole provided in a secondary air plate 13. The secondary air is mixed with the mixed air flowing out of the flame outlet and burns.

Problems to be Solved by the Invention In such a configuration, in the gas water heater, the combustion reaction becomes unstable due to the turbulence of the flow rate of gas and air ejected from the flame hole plate or the secondary air plate, and the flame greatly fluctuates. As a result, the noise due to the combustion increases and the device noise increases. It is very difficult to rectify the flow of gas and air due to downsizing of the equipment, and reducing combustion noise has been a major issue.

The present invention solves such a conventional problem, in which the pressure fluctuation of gas supplied to a plurality of burners is provided with a phase difference between the pressure fluctuation of gas supplied to another burner and a phase difference, thereby reducing noise generated by combustion. It is an object of the present invention to largely reduce noise by canceling out noises generated by burners having different phases.

Means for Solving the Problems The present invention for solving the above problems includes a plurality of burners for adjusting the flow ratio of combustible gas and air supplied from a gas pipe, and combustion air provided in the burners. And a combustion chamber having a heat exchanger that burns combustible gas and air ejected from the burner end face and transfers heat during combustion to water, and an exhaust passage that discharges burned exhaust gas to the outside of the device. An exhaust port, which is connected to each of the plurality of gas pipelines divided by a partition plate vibrating by an electromagnetic force to the burner section, and controls the pressure fluctuation of the combustible gas to be in the opposite phase at each burner section. It consisted of a phase gas control device.

According to the present invention, since the gas pressure fluctuations of about half of the burners have the opposite phase due to the above-described configuration, about half of the noise generated by combustion also has the opposite phase, and the noises of the opposite phases cancel each other out in the combustion chamber. Is done. As a result, noise can be greatly reduced. Further, by electrically vibrating the diaphragm provided on the partition plate in the gas pipeline, the phase of the pressure fluctuation of the gas can be easily reversed.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 in the case of a gas water heater having two burners.

As shown in FIGS. 1 and 2, the gas water heater 20 of the present invention comprises two sets of burner sections 22, 23 for adjusting the flow ratio of combustible gas and air supplied from a gas line 21, and the burner. A combustion chamber 5 provided with a blower 1 for supplying combustion air provided at an end of the bottom surface, a heat exchanger 4 for burning combustible gas and air ejected from the burner end face and transferring heat during combustion to water, The burner unit has an exhaust passage 14 and an exhaust port 6 for discharging the burned exhaust gas to the outside of the apparatus. And a gas pipeline 26, 27 divided into two by a partition plate 25.
Are connected to the respective burners, and a vibration plate 28 vibrating in a direction perpendicular to the surface of the partition plate is provided, and the vibration plate is connected to an electromagnetic coil 29 to electrically apply a vibration force from outside.

One end of a coil 30 was joined to a part of the diaphragm 28, and a magnet 31 was installed at the other end of the coil. When a current flows through the coil, the magnetic field generated in the coil and the magnetic field of the magnet are repelled, so that the coil fluctuates in the axial direction. as a result,
The diaphragm joined to the coil end also vibrates together, and can change the gas pressure. 7 is a water pipe, 32,33
Is a flame.

In such a configuration, the gas pressure of the two gas pipes can be simultaneously changed by the vibration of one partition plate, and the pressure fluctuations of the respective gas pipes can always be in opposite phases in principle. And no signal delay circuit is required.

In addition, noise generated by combustion is highly correlated with fluctuations in gas pressure, and there is a phenomenon that fluctuations in gas pressure cause fluctuations in combustion noise. By utilizing this phenomenon, the noise of the combustion generated from the flame 32 and the flame 33 can be made in the opposite phase by changing the gas pressures of the two burners in opposite phases. For this reason, the noises due to the two combustions cancel each other out in the combustion chamber and are greatly reduced. Especially,
Since the distance between the two burners is made very close due to the miniaturization of the equipment, the distance between the noise sources is very close, and the noise of the opposite phase is canceled more effectively.
There is a great effect on the combustion noise of gas containing much low-frequency noise. In addition, since the pressure fluctuation is applied to the gas before burning, the partition plate to be vibrated can be easily formed without requiring special heat resistance. Further, since the plate inside the gas pipeline that partitions the gas pipeline is a diaphragm, even if the diaphragm is damaged, gas does not leak to the outside, and a safe structure can be provided.

Effect of the Invention As described above, according to the gas water heater of the present invention, the phase of the pressure fluctuation of the gas can be easily changed to the opposite phase by electrically vibrating the diaphragm provided on the partition plate in the gas pipeline. can do. As a result, the gas pressure fluctuations of the two burners are in opposite phases to each other, so that the noise generated by the combustion also has the opposite phase, and the opposite phase noises cancel each other out in the combustion chamber and are canceled out. It can be reduced. In particular, in a gas water heater that contains a lot of low-frequency noise, the distance between sound sources is shorter than the wavelength of the noise, so that the opposite phases are canceled effectively, and the device noise can be greatly reduced. In addition to providing a partition plate that vibrates in the low-temperature part to improve heat resistance and durability, and because the plate inside the gas pipeline is a diaphragm,
Even if the diaphragm is damaged, no gas leaks to the outside, and a safe structure can be achieved.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a gas water heater according to one embodiment of the present invention,
FIG. 2 is a top sectional view of the anti-phase gas control device of the gas water heater, FIG. 3 is a front sectional view of a conventional gas water heater, and FIG. 4 is a side sectional view of the same. 1 ... blower, 4 ... heat exchanger, 5 ... combustion chamber, 6 ...
Exhaust port, 14 Exhaust passage, 20 Gas water heater, 22 Burner part, 24 Antiphase gas control device, 25 Partition plate,
28 ... Diaphragm, 29 ... Electromagnetic coil.

Claims (1)

(57) [Claims] 1. A plurality of burners for adjusting a flow ratio of combustible gas and air supplied from a gas pipeline, a blower provided in the burners for supplying combustion air, and a blower blown from an end face of the burner. A combustion chamber equipped with a heat exchanger that burns combustible gas and transfers heat during combustion to water, an exhaust passage and an exhaust port that discharges burned exhaust gas to the outside of the device, and a partition plate that vibrates with electromagnetic force. A gas water heater comprising an anti-phase gas control device for connecting the divided gas pipelines to the burner sections and controlling the pressure fluctuation of the combustible gas to be in an opposite phase in each burner section.