JPS605300Y2 - Submerged combustion device for bathtubs - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a submerged combustion device for a bathtub that heats bathtub water in a bathtub.

BACKGROUND ART Recently, as a combustion device for a bathtub, a so-called submerged combustion device has been developed, which heats bath water in a bathtub by submerged combustion.

A typical example is shown in FIG.

That is, in the figure, a is a lid whose inside is filled with bath water stored in the bathtub, and inside this lid d is a combustion tube having a smooth exhaust gas outlet C on the lower surface. d is arranged.

Then, in this state, a combustion mixture of combustion gas and combustion air is supplied into the combustion tube d through the mixture supply pipe e, and is combusted in the combustion tube d, so that the combustion flame is blown into the liquid. Made with medium combustion.

Next, the exhaust gas resulting from this submerged combustion is sequentially released from the exhaust gas outlet C in the form of bubbles into the surrounding bathtub water inside the lid d, heating the bathtub water inside the lid 1, and then the heated bathwater. First of all, the bathtub water in the bathtub is replaced by the bathtub water in the lid d by convection through the communication pipes f, f, so that the bathtub water in the bathtub is boiled.

However, when the bath is boiled, the exhaust gas released from the combustion tube d into the lid d passes through the exhaust gas outlet C formed of a smooth surface and is dispersed into the bath water of the surrounding lid d. As a result, a part of the exhaust gas does not reach the exhaust pipe d, but passes through the connecting pipe f as shown in the figure, and is then released into the bathroom. There is a risk of contamination with CO or CO2.

Therefore, in order to solve this problem, as shown in Fig. 2, an exhaust gas shielding plate i is installed between the combustion tube g and the communication pipe h.
A system has been developed in which the exhaust gas is prevented from being released into the bathtub.

However, with such a structure in which the exhaust gas shielding plate i prevents the exhaust gas from being released into the bathtub j, the exhaust gas shielding plate i itself becomes an obstacle to exhaust gas release, and the lid body is attached to the inside and the bathtub. Heat conduction due to convection of the bathtub water with the inside of the bathtub j is prevented, making it impossible to efficiently heat the bathtub water inside the bathtub j.In addition, vibration noise is generated from the exhaust gas shielding plate i etc. due to the stirring action of the exhaust gas in the bubble state. This causes a problem that occurs.

This idea was devised by focusing on the above circumstances, and its purpose is to guide the exhaust gas emitted from the combustion tube to the exhaust tube with a simple structure, and to reduce the amount of exhaust gas released from the combustion tube. It is an object of the present invention to provide a submerged combustion device for a bathtub that can prevent contamination by exhaust gas in a bathroom without causing any obstruction.

An embodiment of this invention will be described below with reference to FIG.

In FIG. 3, reference numeral 1 denotes a strip of a submerged combustion device, and an exhaust pipe 2 is provided on the upper left side of this strip 1.

Further, a combustion tube 3 is disposed at the center of the lid 1.

One end of an air-fuel mixture supply pipe 4 is connected to the upper center of the combustion tube 3 by passing through the upper wall of the strip 1.

The other end of the mixture supply pipe 4 is connected to a mixture supply mechanism (not shown), and a combustion mixture of combustion gas and combustion air is fed under pressure along the inside of the mixture supply pipe 4 from this mixture supply mechanism. and is supplied into the combustion tube 3.

Note that 5 is an ignition heater.

Further, at the lower end of the combustion tube 3, an exhaust gas outlet 3a is provided by cutting the lower end peripheral wall into a tapered shape.
The wide opening surface is positioned toward the exhaust pipe side.

The exhaust gas is guided to the exhaust pipe 2 through the exhaust gas outlet 3a.

The submerged combustion device configured as described above is connected to the bathtub 8 via connecting pipes 7, 7 provided on the sides of the strip 1 in a direction opposite to the exhaust stack 2. There is.

The combustion tube 3 is arranged so that the circumferential wall on the opposite side to the opening surface of the exhaust gas outlet 3a faces away from the opening of the communication pipes 7, 7 that connect the strip 1 and the bathtub 8. This prevents exhaust gas from reaching the bathtub 8 side.

When boiling a bath using the submerged combustion device configured as described above, water is first poured into the bathtub 8 until it reaches a predetermined water level.

Then, the water level inside the lid body 1 becomes the same level as the water level in the bathtub 8, and the inside of the combustion tube 3 is immersed.

Thereafter, by operating a mixture jetting operation section (not shown), a combustion mixture of combustion gas and combustion air is force-fed along the inside of the mixture supply pipe 4, and then an ignition operation section (not shown) is operated. As a result, the combustion mixture is ignited by the ignition heater 5.

Then, upon ignition, a combustion flame is blown into the combustion tube 3, and combustion occurs in the liquid.

The exhaust gas generated by this submerged combustion sequentially accumulates from above inside the combustion tube 3 toward the exhaust gas outlet 3a, and then bubbles are formed from the exhaust gas outlet 3a to the outer periphery of the combustion tube 3 due to the air pressure caused by combustion. state, and are guided and discharged sequentially toward the exhaust stack 2.

Then, the exhaust gas reaches the liquid level, but from the exhaust gas outlet 3a to the liquid level, heat is exchanged with the bathtub water in the lid 1, and 95% of the bath water in the lid 1 is It is heated efficiently with a certain degree of thermal efficiency.

Next, the bathtub water whose temperature has increased is replaced by convection with the bathtub water in the bathtub 8 via the connecting pipes 7, 7, and the temperature of the bathtub water in the bathtub 8 is sequentially raised.

On the other hand, the exhaust gas whose temperature has decreased to the temperature of the bathtub water in the lid body 1 due to heat exchange is sequentially collected in the exhaust pipe 2 and discharged to the outside through the exhaust pipe 2.

In this way, the exhaust gas released from the combustion tube 2 is always actively guided toward the exhaust tube 2 at the exhaust gas outlet 3a, so that it is released into the bathroom via the communication pipes 7, 7. There is no exhaust gas, and it is possible to prevent pollution caused by exhaust gas in the bathroom.

Moreover, since the exhaust gas outlet 3a does not become an obstacle when the exhaust gas flows out, it does not prevent heat conduction inside the bathtub 8 due to convection, and there is no reduction in efficiency, and there is no possibility of vibration noise caused by the exhaust gas. There isn't.

As explained above, this device has an exhaust gas outlet formed by cutting the lower end into a tapered shape at the lower end of the combustion tube, and the opening surface of this exhaust gas outlet is placed on the exhaust tube side. Since the circumferential wall on the opposite side is placed so as to face the opening of the connecting pipe, the exhaust gas flowing out from the combustion pipe can be guided only to the exhaust pipe, which increases the heating of the bathtub water. Exhaust gas can be prevented from being released into the bathroom without interfering with convection or generating vibration noise.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are sectional views showing conventional submerged combustion apparatuses having different structures, and FIG. 3 is a side sectional view showing an embodiment of this invention. 1...Lid body, 2...Exhaust pipe, 3...
... Combustion tube, a ... Exhaust gas outlet.

Claims (1)

[Scope of utility model registration request] The exhaust gas of the combustion mixture burned in the liquid in the combustion cylinder flows out into the water of the bathtub filled in the pot body, and the heated bathwater is passed through the connection between the lid body and the bathtub. The water in the bathtub is heated by convection displacement with the water in the bathtub through the pipe, and the heated exhaust gas released into the cauldron is disposed on the upper side of the lid in a direction different from the side of the connecting pipe. In a submerged combustion device for a bathtub, the exhaust gas is discharged to the outside through an exhaust pipe provided at the combustion pipe, and an exhaust gas outlet is formed at the lower end of the combustion pipe by tapering the lower end circumferential side of the combustion pipe. The combustion tube is arranged so that the opening surface of the exhaust gas outlet faces the above-mentioned exhaust tube side, and the peripheral side wall on the opposite side from the opening surface of the exhaust gas outlet faces the opening of the communication pipe. A submerged combustion device for a bath kettle, characterized in that it is arranged in a bathtub.