JPH01169204A - Steam generator - Google Patents

Abstract

PURPOSE:To protect a drain pipe from being clogged by catching scale pieces by forming the drain pipe of an expandable and flexible hose. CONSTITUTION:The operation of a steam generator is stopped, at the same time a drain valve 10 is opened and the water in a tank 2 is energized by the pressure of P1 applied in the tank 2 to drain. At this time scales 14 are peeled off to fall to the lower part of the tank 2 by the difference in coefficient of thermal expansion of the tank 2 contracted by cooling and the scale 14. The faller scale pieces 14' are drained from a drain valve 10 together with the water 12 in the tank 2. Since steam pressure P1 is applied in the tank 2, drain is energized by the pressure to drain. Since at this time the expandable and flexible hose of a drain pipe 9 causes the vibrations of l1 and l2 and hose diameter is flexible, scale pieces caught midway are eliminated by vibration to drain.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam generator that fills a bathroom or the like with steam to heat the air in the bathroom and is used in a sauna or the like.

2. Description of the Related Art In general, this type of steam generator that generates steam by boiling water has a can body 16 and a can body 1, as shown in FIG.
A steam outlet 19 and a water supply port are provided in the upper space of the can body 1b, and a large number of fins 17 are welded to the outer peripheral surface of the can body 1b.
absorbs the combustion heat of the burner 15, and the water 27 inside the can body 16
A steam pipe that heats and boils to generate steam 28 and sends the steam 28 out of the vessel from a steam outlet 19, and a metal pipe that drains water 27 in the can body 16 when the steam generator is stopped. The drain pipe 24 is made of a hard pipe such as a drain pipe 24, and a drain valve 25 is provided downstream of the drain pipe 24.

In the above-described configuration, the water 27 in the can body 16 decreases due to the continuous steam generation, but the water level is controlled by the upper water level sensor 2o and the upper water level sensor 21 provided in the can body 16. Water is supplied from the water supply port 18 into the can body 16 as indicated by the arrows so as to maintain the water level within the range where both water level sensors are located. Since the water 27 in the can body 16 is always boiling and producing steam, the scale components contained in the water (
Calsulam, magnesium, silica, etc.) were precipitated and concentrated, and adhered to the inner wall of the can body 16 (see FIG. 4).

The attached scale 29 shrinks because the water 27 inside the can body is drained when the steam generator is stopped, and the can body 16 is cooled down.

At this time, the can body 16 and the scale 29 are peeled off due to the difference in thermal expansion coefficient, and fall to the lower part of the can body 16 as scale pieces 29'. At the time of draining, the scale pieces 29' are drained together with the water 27 inside the can through a drain pipe and a drain valve.

Problems to be Solved by the Invention However, the thick scale pieces 29' that came out of the water supply port 18 at the very limit are caused by deformation of the drain pipe made of a hard metal pipe or during transportation. The scale pieces 29' got stuck in the dented area, and several scale pieces 29' overlapped thereon, clogging the drain pipe and making it impossible to drain water and remove the scale pieces.

Therefore, in order to solve this problem, the wall thickness of the drain pipe 24 is increased to make it difficult to deform, and the water to be replenished is controlled by a water softener 23 or the like connected to the water supply pipe 22, which removes the scales contained in the water. A decomponent configuration was used. However, with the above configuration, it is necessary to regenerate the ion exchange resin used in the water softener 23 with saline water due to its decreased functionality, and to replace the ion exchange resin due to its deterioration, making it difficult to use such a steam generator. This poses a problem in that it imposes financial and labor burdens on general users who use such sauna equipment.

The present invention solves such conventional problems, and uses a simple device without installing an expensive and complicated water softener.
The purpose is to prevent drainage pipes from clogging due to scale fragments getting caught.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a can body having a steam outlet and a water inlet, a heating source for heating the can body to boil the water inside the can body, and a can body having a steam outlet and a water supply inlet. A water supply pipe that sends water to the can body, a drain pipe and a drain valve that drain water from the can body are provided, and the drain pipe is formed of a flexible hose that can be expanded and contracted.

According to the present invention, with the above-described configuration, even if scale pieces coming out from the water supply port get caught in the middle of the drain pipe, since the drain pipe is expandable and flexible, the hose will be prevented by the steam pressure during draining. As it expands and contracts, it also vibrates from side to side and back and forth, which has the effect of shaking it off.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIG. 1, a burner, which is a heating means, is placed below the can with a certain combustion space in between. Inside the can body 2, there is a steam outlet 5 in the upper space and a water supply port 4 in the lower water.
A top water level sensor 6 and a top water level sensor 7 are provided to keep the water level in the can body 2 within a certain range, and on the outer circumferential surface of the can body 2, there are fins that absorb the burning heat of the burner 1. 3 are welded in large numbers. Furthermore, there is a water supply pipe 8 connected to the N water inlet 4 of the can body 2, a water pipe 9 that branches off from this water supply pipe 8 just before the water inlet 4, and a drain valve 10 downstream thereof that opens at the same time as the steam generator stops. is provided. The drain pipe uses a silicone hose that is flexible and expandable and can withstand high-temperature water drainage.

In the above configuration, when the burner 1 burns, the fins 3 absorb the combustion heat, and the water 12 in the can body 2 is heated up by f$ and rises by i'jb, thereby generating steam 13. Steam generated 1
3 is sent out from the steam outlet 5 through the steam pipe 11 to the outside of the vessel. The water 12 in the can body 2 evaporates and decreases, but when the water level reaches the upper and lower water level sensors 6 and 7, the water supply valve (not shown) is controlled to open and close. Water is supplied from the water supply port 4 to maintain the water within the range.

Since the water 12 inside the can body 2 is always boiling, the scale components contained in the water precipitate and become thick and stick to the inner wall of the can body 2 (see FIG. 2). At the same time as the steam generator stops, the drain valve 10 opens, and the water 12 inside the can body 2 is vigorously drained away by the pressure P1 applied inside the can body. Therefore, the can body 2 is rapidly cooled and contracts. At this time, due to the difference in thermal expansion coefficient between the can body 2 and the scale 14, the scale iit is peeled off and falls to the lower part of the can body 2 as scale pieces 14'. The subsided scale pieces 14' can be drained out of the container together with the water 12 inside the container through the drain valve 1. As described above, since the steam pressure P1 is applied inside the can body 2, the waste water flows out forcefully due to this pressure. The hose of the drain pipe 9, which is expandable and flexible due to the pressure at this time, causes vibrations of tl and t2, and the diameter of the hose expands and contracts, so scale pieces caught in the middle are sieved off and discharged. can do.

Although a silicone hose was used in the embodiment, any material may be used as long as it is stretchable and flexible.

Further, the burner may use gas, oil, coal, wood, etc. as fuel. Further, the heating source may be an electric heater.

Effects of the Invention As described above, according to the present invention, the following effects are achieved by JQ.
J I can wait.

(1) Since the drain pipe uses a flexible and expandable hose, the hose vibrates due to the pressure during drainage, and the diameter of the hose expands and contracts. It will not get clogged. Also, it will not be deformed or dented during transportation or processing.

C) There is no need for regeneration work or ion exchange resin replacement work required for conventional water softeners, etc., and there is no labor or economic burden on the user.

(3) Compared to water softeners, water purifiers, etc., the structure is 1 m long, so it is low cost.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a steam generator showing an embodiment of the present invention, Fig. 2 is a sectional view of the 8-A gland in Fig. 1, Fig. 3 is a radial sectional view of a conventional example, and Fig. 4 is a sectional view of the steam generator according to an embodiment of the present invention. The figure is a front view of the B-B gland in FIG. 3. 1... Burner, 2... Can body, 4...
...Water inlet, 5...Steam outlet, 8...
Water supply pipe, 9... Drain pipe, 10... Drain valve.

Claims (1)

[Claims] A can body with a steam outlet and a water inlet, a heating source that heats the can body to boil the water inside, a water supply pipe that sends water to the can body, and a drain pipe and drain valve that drain water from the can body. established,
A steam generator in which the drain pipe is formed of a flexible hose that can be expanded and contracted.