JPS6314170Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pulsating combustion type water heater, and in particular, an air supply muffler is installed between an air chamber and an air supply fan, and the noise peculiar to pulsating combustion is muffled by the muffler on the exhaust side. Together with this, it is possible to effectively erase the data.

In the conventional pulsating combustion type water heater of this type, as shown in Fig. 2, the muffler 7 on the air supply side is installed between the air supply fan F and the air supply top 11, so pulsating combustion such as combustion noise is generated. There was a drawback that the unique noise entered the air supply fan F through the air chamber 6 and leaked to the outside from the casing of the air supply fan F. In other words, because the outer shell of the air supply fan F does not have a sufficiently thick plate structure, the cycle of air supply, explosive combustion, expansion, and exhaust is repeated approximately 80 to 100 times per second, resulting in pulsating explosive combustion. The noise leaked out to the outside before reaching the muffler on the air supply side, and the muffling effect of the air supply muffler was halved, and combined with the resonance of the air supply fan, it was impossible to effectively eliminate the noise. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals.

This invention was made with the aim of eliminating such drawbacks, and one embodiment of the invention will be described below with reference to the drawings.

In Fig. 1, 1 is a hot water storage tank, and a pulsating combustion device in which a mixture of fuel gas and combustion air is forcibly fed to a combustion chamber 2 and combusted explosively within the combustion chamber 2. A heat exchanger consisting of a combustion chamber 2, an exhaust pipe 3, an exhaust chamber 4, an exhaust primary muffler 5, etc. is installed to serve as a heating source for a water heater. F is an air supply fan, and its outlet 8 is connected via an air supply muffler 7 to an air chamber 6 provided at one side of the lower part of the hot water storage tank 1 and used to prepress combustion air; The combustion system is such that an air supply top 11 is connected via an air supply pipe 10, and the entire amount of combustion air is mixed with combustion gas as primary air. Reference numeral 12 designates a gas chamber, in which a gas jet nozzle 13 from the gas chamber 12 faces a mixing chamber 14 of the pulsating combustion device, and combustion air is supplied by opening and closing an air valve (not shown) provided in the mixing chamber 14. At the same time as the fuel gas is turned off, the fuel gas is also turned on and off so that the fuel gas and combustion air are mixed in the mixing chamber 14 and the mixture is fed to the combustion chamber 2. A gas supply pipe 15 is connected to the gas chamber 12 through a nozzle 16, and is provided with a slow ignition governor 17, a main solenoid valve 18, and a main solenoid valve 19 in the middle. 20 is a secondary exhaust muffler installed outside the hot water storage tank 1, which is the primary exhaust muffler 5.
and the exhaust top 21. 22 is a water supply pipe to the hot water storage tank 1, and is provided with a pressure reducing check valve 23 and a drain valve 24 in the middle. 25 is a hot water supply pipe from the hot water storage tank 1, and a safety valve 26 is provided in the middle. 27
28 is a heat sensitive body for temperature adjustment, and 28 is an electrode for preventing dry firing.
29 is a spark plug, 30 is a flame rod, 31
is the drain outlet.

In the above configuration, combustion air to the mixing chamber 14 is taken in from the air supply top 11 by rotation of the air supply fan F, passes through the air supply pipe 10, the air supply fan F, the air supply muffler 7, and the air chamber 6, and is then sent to the air valve. On the other hand, fuel gas is supplied from the gas supply pipe 15 through the nozzle 16 and the gas chamber 12 to the gas jet nozzle 13, and after being sufficiently mixed in the mixing chamber 14, it is sent to the combustion chamber 2. . The air-fuel mixture fed to the combustion chamber 2 is ignited by the spark from the ignition plug 29 and combusts explosively. After that, combustion continues while pulsating air supply, explosive combustion, and exhaust. In the combustion operation described above, a spark from the ignition plug 29 is required at the beginning of operation, but after a while, self-ignition occurs due to a rise in temperature of the combustion chamber 2, etc., and continuous combustion occurs. The combustion exhaust gas from the continuous explosive combustion is guided from the exhaust pipe 3 to the exhaust chamber 4 and the primary exhaust muffler 5, where it extinguishes the noise and undergoes heat exchange to heat and raise the temperature of the water stored in the hot water storage tank 1. Thereafter, the exhaust gas is decelerated and muffled through the secondary exhaust muffler 20, and is discharged from the exhaust top 21 to the outside of the device. On the other hand, the noise on the air supply side is quickly eliminated by the air supply muffler 7 installed between the air chamber 6 and the air supply fan F in a place close to the sound source, so that the air supply fan F does not resonate or make noise. There is no leakage from the air supply fan F.

As explained above, this design has an extremely simple structure in which the muffler on the air supply side is interposed between the air chamber and the air supply fan, and the noise peculiar to pulsating combustion is suppressed by the muffler on the exhaust side. Together they can be effectively eliminated.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing an embodiment of this invention, and FIG. 2 is a schematic block diagram of a conventional example. 1...Hot water tank, 2...Combustion chamber, 3...Exhaust pipe,
4... Exhaust chamber, 5... Exhaust primary muffler, 6...
Air chamber, F...Air supply fan, 7...Air supply muffler.

Claims (1)

[Scope of utility model registration request] At the initial stage of ignition, a mixture of fuel gas and air is forcibly fed into the combustion chamber and explosively combusted by the spark plug.After that, the pulsating combustion type water heater automatically repeats air supply, explosive combustion, and exhaust to continue combustion. A pulsating combustion water heater characterized in that an air supply muffler 7 is interposed between the air chamber 6 and the air supply fan F to eliminate noise caused by explosive combustion.