JPS60232454A - Pulse combustion type hot water supply device - Google Patents

Abstract

PURPOSE:To obtain a handy pulse combustion hot water supply device whose hot water supply in a hot water storage method and a tap controlling method are made possible, by performing selectively either the hot water supply from a hot water storate tank or that through a heat exchanger provided on a combustion gas system from the hot water storage tank. CONSTITUTION:A heat exchanger 21 is arranged within a decoupler 7 in a hot water storage tank 10 and a three way valve 22 is arranged in the middle part of a hot water supply pipe 13. When pulse combustion is started in a combustion chamber 6, hot water in the hot water storage tank 10 is circulated by passing through an inlet pipe 21a, the heat exchanger 21, an outlet pipe 21b, the three way valve 22 and the hot water supply pipe 13 and the hot water is accumulated in the hot water storage tank 10. When a faucet 14 is released at this time, hot water supply in a hot water storage method can be performed. When the titled device is used as tap controlling one, only two way directions between the outlet pipe 21b and the faucet 14 of the three way valve 22 are released. When the faucet 14 is released under the above state, the water in the hot water storage tank 10 is entered into the heat exchanger 21 through the inlet pipe 21a, heated instantaneously in this place, turned into the hot water and discharged through the faucet 14 by passing through the outlet pipe 21b and the three way valve 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a pulse combustion water heater that is equipped with a pulse combustion machine and supplies hot water obtained by pulse combustion.

[Technical background of the invention]

In recent years, there has been an increasing awareness of energy conservation not only in the industrial world but also in home appliances, and there has been a growing demand for higher efficiency for household heat sources. In order to meet these demands, a pulse combustor that applies a pulse jet to combustion and directly utilizes the heat of combustion reaction has been developed, and has already been adopted in feeders and the like.

Here, FIG. 1 shows an example of a pulse combustion water heater equipped with a pulse combustion machine as described above. In FIG. 1, first, a fuel pipe 1 for supplying fuel (gas), a gas flapper valve 2 disposed in the middle of this fuel pipe 1, an air pipe 3 for supplying combustion air, and this air pipe 3, a mixing chamber 5 for mixing the supplied fuel and air, a combustion chamber 6 for pulse combustion of the mixture obtained in the mixing chamber 5, and an air flapper valve 4 provided in the middle of the combustion chamber 6. a deka bluff that rectifies the combustion gas, a heat exchanger 8 to which the combustion gas is supplied through the deka bluff, and this heat exchanger 8.
A pulse combustion machine is constituted by an exhaust pipe 9 for discharging the combustion gas that has passed through the exhaust pipe 9 and the like. Although not shown, the combustion chamber 6 is provided with a spark plug.

In this pulse combustion machine, the combustion chamber 6, the dekabluff, the heat exchanger 8, and the surrounding area constitute a combustion gas system, and this combustion gas system is arranged in the hot water storage tank 10 ( Water is supplied to this hot water storage tank 10 via a water supply pipe 11 and an on-off valve 12, and the supplied water is heated by the heat of the combustion gas system. A hot water supply pipe 13 serving as a hot water supply section and a faucet 14 at its tip are communicated with the hot water storage tank 10 .

Therefore, when pulse combustion is performed, the water in the hot water tank 10 is heated by the heat of the combustion gas system, and hot water is stored in the hot water tank 10.

By opening the faucet 14, hot water can be supplied.

(Problems with the background technology) However, in such a pulse combustion water heater,
Like regular hot water storage systems that do not use pulse combustion, it takes time to boil water, and the drawback is that hot water cannot be supplied immediately when needed. Furthermore, even if a small amount of hot water is to be supplied, a large amount of water must be boiled, which wastes fuel and is uneconomical. In other words, the energy-saving effect, which is an advantage of pulse combustion, is lost.

[Purpose of the invention]

This invention was made in view of the above circumstances,
The purpose is to be able to perform not only hot water storage type hot water heating but also instantaneous hot water heating, which greatly improves usability, and also eliminates wasted fuel and enables pulse combustion. An object of the present invention is to provide a pulse combustion type water heater which is excellent in practicality and economy and can fully exhibit the energy-saving effect of.

[Summary of the invention]

This invention provides a pulse combustion type water heater in which a pulse combustion type combustion gas system is disposed in a hot water storage tank, and hot water in the hot water storage tank obtained by pulse combustion is supplied. In addition to providing an exchanger, the hot water storage tank and the hot water supply section are communicated through the heat exchanger, and hot water is selectively supplied directly from the hot water storage tank and from the hot water storage tank through the heat exchanger.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. However, in the drawings, the same parts as in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIG. 2, a heat exchanger 21 is disposed in the combustion gas system in the hot water storage tank 10, for example, in a decabluff, and
A three-way valve 22 is disposed in the middle of the hot water supply pipe 13. Then, the inlet pipe 21a of the heat exchanger 21 is opened into the hot water storage tank 10, and the outlet pipe 21b of the heat exchanger 21 is connected to the three-way valve 21.
It communicates with the hot water supply pipe 13 via.

Next, the operation in the above configuration will be explained.

When fuel and air are supplied, the fuel and air are mixed in the mixing chamber 5, and this mixture is supplied to the combustion chamber 6. Then, the mixture explodes with the spark of the ignition plug in combustion g6, and the high temperature and high pressure combustion gas obtained from this explosion becomes a deca bluff.

Heat exchanger8. and is discharged to the outside through the exhaust pipe 9. Thereafter, the fuel intake and intake actions continue due to the negative pressure during exhaust. Further, after the start of combustion, the operation of the spark plug stops, but the ignition action continues due to the residual heat of the combustion gas that partially returns to the combustion chamber 6. In this way, when pulse combustion is started, the water in the hot water storage tank 1o is heated by the heat of the combustion gas system. In this case, the inside of the heat exchanger 21 is also heated, but the water shortage inside the hot water storage tank 1o is caused by the inlet pipe 2 as shown by the arrow.
1a, heat exchanger 21. Outlet pipe 21b, three-way valve 22. Since the hot water circulates through the hot water pipe 13, the heat exchanger 21 will not be damaged. Then, by continuing pulse combustion, hot water is stored in the hot water storage tank 1o.

Therefore, if the faucet 14 is opened at this time, the hot water tank 1
The waterfall in 0 is the hot water pipe 13. It is discharged from the faucet 14 through the outlet pipes 21b and 21b and the three-way valve 22. In other words, it is possible to perform hot water supply using a hot water storage type as in the conventional method.

When used as an instantaneous type, the three-way valve 22 opens only in two directions between the outlet pipe 21b and the faucet 14, as shown in FIG. Therefore, if the faucet 14 is opened in this state, the water in the hot water tank '10 will flow from the inlet pipe 21a to the heat exchanger 2.
1, where it is instantaneously heated to become hot water, which is then discharged from the faucet 14 through the outlet pipe 21b and the three-way valve 22 as shown by the arrow in the figure.

In this way, by switching the three-way valve 22, the hot water tank 10
Direct hot water supply from the hot water storage tank 10, so-called storage type hot water supply, can be performed, and hot water supply from the hot water storage tank 10 through the heat exchanger 21, so-called instantaneous hot water supply, can also be performed. Therefore, it is possible to take advantage of the respective advantages of the hot water storage type and the instantaneous type, and the usability can be greatly improved. especially,
Instant hot water supply allows you to get hot water immediately when you need it. Moreover, if only a small amount of hot water is used, there is no need to boil a large amount of water as in the conventional method, and therefore no fuel is wasted. In other words, the energy saving effect of pulse combustion can be fully exhibited.

In the above embodiment, the heat exchanger 21 is provided in the dekabluff, but the heat exchanger 21 is not limited thereto, and may be provided in the combustion chamber 6, heat exchanger 8, etc. in the same combustion gas system. Further, although the three-way valve 22 is used to switch between the hot water supply type and the instantaneous type, other valves may be used as long as they have the same function.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to perform not only storage-type hot water supply but also instantaneous hot-water supply, which makes it possible to greatly improve usability, and furthermore, to avoid wasting fuel. Therefore, it is possible to provide a pulse combustion type feeder mt device which is excellent in practicality and economy and can fully utilize the energy saving effect of pulse combustion.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a diagram for explaining the operation of instant hot water supply in the same embodiment. 6... Combustion chamber, 7... Decoupler, 10... Hot water storage tank, 13... Hot water outlet pipe (heating section), 14... Faucet (heating section), 21... Heat exchanger , 22... three-way valve. Applicant's agent Patent attorney Takehiko Suzue Figure 1 0

Claims (1)

[Claims] In a pulse combustion type water heater in which a combustion gas system of a pulse combustion machine is arranged in a hot water storage tank and hot water in the hot water storage tank obtained by pulse combustion is supplied, a heat exchanger is installed in the combustion gas system in the hot water storage tank. In addition, the hot water storage tank and the heating section are communicated through the heat exchanger, and hot water is selectively supplied directly from the hot water storage tank or from the hot water storage tank through the heat exchanger. A pulse combustion water heater featuring the following.