JPH0117047B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an all-primary air combustion type pulsating combustion device used as a heating source for a hot water storage type water heater. The input side mechanism is removably housed, and the muffler is housed and installed in the hot water storage tank of the water heater to increase the silencing effect on the input side, and also to eliminate noise by combining the silencing effect on the exhaust side. The purpose is to facilitate maintenance and inspection.

Generally this kind of pulsating combustion device has almost 60 ~
Since it performs 150 continuous explosions and combustions, the noise is significant.Therefore, although various noise countermeasures have been devised in the past, they are still not sufficient.

This invention has been made in view of this point, and one embodiment thereof will be described below in detail based on the drawings. In FIGS. It is divided into two chambers, an air chamber/expansion chamber 2, and both chambers 1 and 2 are communicated with each other by a communication pipe 4 forming a narrow passage. The air supply duct 6 from the forced air supply fan F installed above is connected, and the noise generated by explosive combustion is transferred to the air chamber and expansion chamber 2.
The sound is decelerated and muffled in the muffler chamber 1, and the sound is muffled in the same manner in the muffler chamber 1, resulting in a two-stage muffling effect. And the above input side muffler A
Part of the air chamber and expansion chamber 2
A gas chamber C is installed therein, and the air chamber/expansion chamber 2 is communicated with a mixing chamber 7 provided at the lower part of the muffler A on the input side via an air supply valve V, and the gas chamber C has a gas pipe 9 having a gas jet nozzle 8 at its tip. It communicates with the mixing chamber 7 via. The air supply valve V is a disk-type vibrating valve, and valve seats 11 and 1 are opposed to each other with a small gap to the partition plate 10 that partitions the air chamber/expansion chamber 2 and the mixing chamber 7 of the input muffler A.
The structure is such that a valve body 13 reciprocates between the two and opens and closes the valve opening 14 for each cycle of air supply, ignition explosion, expansion, and exhaust. This is screwed onto the bottom of the partition plate 3 so that it can be freely attached and detached, and which integrally connects the partition plate 10 and the gas chamber C via the gas pipe 9, and which is tightly fitted into the input side muffler A so as to be freely movable. The communication pipe 4, which can be inserted into the gas chamber C, and the gas supply pipe 15, which is fixed to the gas chamber C, are integrally connected. It can be attached to and detached from the shell freely. Note that the connection between the partition plate 10 and the outer shell of the muffler A is not limited to screwing, and any other arbitrary means may be used.

The input-side muffler A configured as described above is installed so as to be submerged on one side of the hot water storage tank B of the water heater, and the combustion chamber connected to the lower part of the mixing chamber 7 is placed on the other side of the hot water storage tank B. An exhaust side muffler G connected to the chamber 16 via an exhaust pipe 17 is housed in a storage device so as to be submerged in water. This exhaust side muffler G has an expansion chamber 18 and a silencing chamber 19 connected through a narrow passage 20, and similarly to the above-mentioned input side muffler A, a two-stage silencing effect is performed, so that the noise is suppressed during explosive combustion. Efforts are being made to eliminate the noise generated. 21 is an exhaust port, 22 is a drain outlet,
23 is a bent portion of the exhaust pipe 17. In the above embodiment, the input side muffler A has a structure in which the silencing chamber 1 and the air chamber/expansion chamber 2 are connected through the communication pipe 4. Although the structure may be such that a narrow gap is provided between the muffler A and the outer shell of the muffler A, implementation is free, and the air supply valve V is, of course, not limited to the disk-type vibrating valve of the embodiment. .

FIG. 3 shows a different embodiment of the exhaust side muffler G, in which a part of the muffler G is used as a heat exchanger to effectively utilize the heating source. That is, the exhaust pipe 17 is connected to the jacket 24, and this jacket 2
4 and the expansion chamber 18 of the exhaust side muffler G are connected and communicated through a plurality of heat exchange pipes 25.

In the above configuration, the air supplied from the forced air supply fan F is routed from the air supply duct 6 to the input side muffler A.
Since the air supply valve V is pushed open and supplied to the mixing chamber 7 via the muffling chamber 1 and the air chamber/expansion chamber 2, the combustion air enters the mixing chamber with sufficiently equal pressure. The noise generated during explosive combustion is decelerated and muffled by the air chamber/expansion chamber 2 of the muffler A on the input side, and then by the two-stage deceleration and muffling action of the muffler chamber 1. On the other hand, the fuel gas from the gas supply pipe 15 is sufficiently pressure-equalized and supplied to the mixing chamber 7 from the gas jet nozzle 8 via the gas chamber C, where it is sufficiently mixed with the pressure-equalized supply air, and this mixture Air is supplied to the combustion chamber 16 and ignited by the discharge spark from the ignition electrode, resulting in explosive combustion.The expanded exhaust pressure closes the air intake valve V and fills the space between the air intake valve V and the expansion pressure. increases momentarily, but then the exhaust air is rapidly discharged downstream, causing a rapid decompression, and the air pushes open the air supply valve V again to flow into the mixing chamber 7, mix with gas, and enter the next cycle. At the beginning of operation, a discharge spark from the ignition electrode is required to ignite the air-fuel mixture, but after a while, high-temperature exhaust gas remains and self-ignition occurs even without a discharge spark. Thus,
It performs continuous combustion by repeating the cycle of air supply, ignition explosion, expansion, and exhaust approximately 60 to 150 times per second. The combustion exhaust gas from the continuous explosive combustion is passed from the exhaust pipe 17 through the exhaust side muffler G, effectively heating the water in the hot water storage tank B and removing the noise generated during the explosive combustion, and then quickly passing through the exhaust port 21.
It is released outside the vessel.

As explained above, this invention has a structure in which the input side mechanisms such as the air chamber and the gas chamber are housed in the input side muffler, which is housed and installed in the hot water tank and submerged in water. As a result, the noise on the input side due to explosive combustion is almost completely eliminated, and together with the elimination of the noise during explosive combustion by the exhaust side muffler, the noise due to pulsating combustion is significantly reduced. In addition, a part of the input side muffler is used as an air chamber, and input side mechanisms such as the air chamber, gas chamber, and air intake valve can be freely attached to and removed from the input side muffler's outer shell. Even if the hot water tank is submerged in water, maintenance and inspection can be easily carried out without draining the water from the hot water tank.

[Brief explanation of drawings]

FIG. 1 is an overall sectional view showing one embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of an air supply valve section, and FIG. 3 is a sectional view of a different embodiment of the exhaust side muffler. F... Forced air supply fan, A... Input side muffler, B... Water heater storage tank, C... Gas chamber, V... Air supply valve, 1... Silence chamber, 2...
Air chamber/expansion chamber, 7...Mixing chamber, 8...
...Gas jet nozzle, 9...Gas pipe.

Claims (1)

[Claims] 1 In a pulsating combustion device of all primary air combustion type used as a heating source for a hot water storage type water heater, the forced air supply fan is connected to the muffler on the input side, and the muffler uses a part of it as an air chamber to supply air. The muffler is connected to the mixing chamber through a valve, and a gas chamber is installed in the muffler, and the muffler is connected to the mixing chamber through a gas pipe having a gas jet nozzle at the tip. A pulsating combustion device characterized in that the muffler is freely attachable to and detachable from an outer shell and is housed and installed in a hot water storage tank of a water heater.