JPH0443161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a steam generator for filling a bathroom or the like with steam for use in a sauna room or the like.

2. Description of the Related Art In general, this type of steam generator that evaporates water to generate steam has a can body 17 and a steam outlet 20 provided in the upper space of the can body, as shown in FIGS. 4 and 5. A water supply port 19 provided at the bottom of the can body, a heat absorption fin 18 provided on the outer peripheral surface of the can body that absorbs heat from the burner 16, and a burner 16 serving as a heat source is arranged below the can body 17. In addition, inside the can,
Water level detection sensors 21 and 22 are provided to keep the water level inside the can within a certain range. Further, upstream of the water supply port 19, there is a water level detection sensor 2 inside the can body 17 and a water level detection sensor 2.
Water treatment equipment 24, such as a water softener, was connected to water treatment equipment 24 to prevent scale buildup on water 1 and 22.

With the above configuration, when the water in the can body 17 boils and steam is generated, it becomes a steam-water mixture 25 in the space above the can body 17, and the steam is separated in the same space and the steam is taken out from the steam outlet 20. It is being sent out of the vessel. By continuing evaporation, water is replenished one after another from the water supply port 19, but vapor residue (scale components such as calcium, magnesium,
silica, etc.) will be concentrated and deposited on the wall surface of the can body 17 and the water level detection sensors 21 and 22. However, a water treatment device 24 such as a water softener is connected upstream of the water supply port 19, and water from which scale components have been removed is supplied into the can body 17.

Problems to be Solved by the Invention However, with the above configuration, it is necessary to regenerate the ion exchange resin using saline solution and replace the ion exchange resin as the function of the ion exchange resin used in the water softener deteriorates, making it economically uneconomical for general users. Problems that impose a burden and labor burden, and scale adhesion on the inner surface of the can body 17 due to the use of water softeners etc. when their functions are degraded 30
(See FIG. 7) and the water level cannot be detected due to scale adhesion 29 to the electrodes 28 of the water level detection sensors 21 and 22 shown in FIG.

The present invention is intended to solve the above-mentioned problems, and aims to prevent scale buildup on the inner wall of the can and the water level detection sensor without installing a water softener or the like.

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 water inside the can body, and a heat source for heating the can body to boil water inside the can body. It is made up of a large number of solids that have a specific gravity heavier than the water put in it and are insoluble in water or hot water, and a large number of solids that have a specific gravity lighter than water and are insoluble in water or hot water.

Effects The present invention has the above-described configuration, so that when the water in the can body boils, the force of boiling the two types of solids contained in the can body 2 causes many solids heavier than water to be disturbed and moved to the can body. It scrapes the inner wall and also partially scrapes the surface of the water level detection sensor. Further, a large number of solids, which have a specific gravity lower than that of water, move up and down with the water level and move agitatedly due to the boiling force, thereby rubbing against the water level detection sensors 8 and 9. The disturbed movement of these two types of solids has the effect of preventing scale from adhering to the inner wall of the can body and the water level detection sensor, and at the same time has the effect of pulverizing scale that has fallen off due to mutual contact between the solids.

Embodiments Examples of the present invention will be described below with reference to the drawings. In Figures 1, 2, and 3,
A burner 1 serving as heating means is installed below the can body 2 with a certain combustion space in between. A large number of heat absorbing fins 3 that absorb heat from the burner 1 are welded to the outer peripheral surface of the can body 2. The can body 2 has a steam outlet 5 in the upper space and a water inlet 4 communicating with the water below.
In addition, filters 7 and 6 are provided at the steam outlet 5 and the water supply port 4 to prevent a large number of granular solids 10 and 11 from flowing out.
is provided. Also, inside the can body 2 are a large number of granular solids 11 which have a specific gravity heavier than water and cannot be dissolved in water or boiling water, and a large number of granular solids 10 which have a specific gravity lighter than water and which cannot be dissolved in water or boiling water. It is being In addition, there is a high-level water level detection sensor 8 on the side inside the can body 2 that sends a signal to stop the water supply.
A low level sewage level detection sensor 9 is provided which outputs a signal to start water supply. A drain valve 13 for draining water 12 inside the can body 2 is provided in a drain channel 32 below the water supply port 4 and branched from the water supply channel 31.

In the above configuration, the combustion heat of the burner 1 is absorbed by the heat absorbing fins 3 and transferred to the can body 2, and the water 12 in the can body 2 is heated and boiled to generate evaporation bubbles 14. Two types of solids 10,1 placed in the can body 2
1 causes disturbance movement within the can body 2 due to the steam bubbles 14 and the rippling force of boiling, and a large number of solids 11, which have a specific gravity heavier than water, are connected to the inner wall of the can body 2 and the water level detection sensors 8 and 9.
Rub the surface of a large number of solids 1, which have a specific gravity lighter than water.
2 moves up and down with the water level and rubs the surfaces of the water level sensors 8 and 9 due to the disturbance movement caused by boiling. The air-water solid mixture 15 is in the upper space of the can body 2.
Gas, water and solids are separated in the upper space, and only steam is taken out from the steam outlet 5 and sent out of the vessel. When used as a steam sauna, steam is sent to the sauna room via a pipe.
On the other hand, the water 12 in the can body 2 evaporates and decreases, but is replenished from the water supply port 4 so that it is always maintained within a certain range by the upper and lower water level detection sensors 8 and 9. By repeating this cycle, the water in the can body 2 becomes concentrated, and the scale components become thicker, so that they would normally adhere to the inner wall of the can body 2 and the surfaces of the upper and lower water level detection sensors 8 and 9. However, due to the disturbance movement of the two types of solids 10 and 11 mentioned above due to the force of the hot water, the can body 2, the upper and lower water level sensors 8,
9, it is scraped off and no deposits are deposited. In addition, the water 12 in the can body 2 with concentrated scale components
Since the water is discharged from the can body 2 by the drain valve 13 which is configured to open at the same time as the steam generator is stopped, scale components are not deposited inside the can body 2.

Note that the solids 10 and 11 are composed of several angular particles. The burner may be fueled by gas, oil, coal, firewood, or the like, or may be heated by an electric heater. In addition, in the above example, the solid 10,1
Although particles with several corners are used as the shape of Example 1, rounded particles without corners may also be used.

Effects of the Invention As described above, the steam generator of the present invention provides the following effects.

(1) The can body contains many solids that have a specific gravity higher than water and cannot be dissolved in water or boiling water, and many solids that have a specific gravity lighter than water and cannot be dissolved in water or boiling water. Due to the disturbance movement caused by the force, the solids, which have a specific gravity heavier than water, rub against the can wall and the surface of the water level detection sensor to prevent scale from adhering to them.Also, due to the disturbance movement of a large number of solids, which have a specific gravity lighter than water, the water level detection sensor It scrapes away scale to prevent it from adhering to the surface, maintains high thermal efficiency over the long term, and allows accurate control of water supply to the can.

(2) Furthermore, since the peeled off scale is crushed by the contact between the solids caused by the disturbed movement of the large number of solids, the scale components can be efficiently discharged during drainage.

(3) Conventional water treatment equipment such as water softeners is no longer required, and a device can be provided that does not impose economic or labor burdens.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a steam generator showing one embodiment of the invention, and FIG. 2 is a cross-sectional view taken along line A--A in FIG. 1, showing a state in which the steam generator is not heated by a burner. Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 1 showing the state heated by the burner, Fig. 4 is a longitudinal cross-sectional view of the conventional example, and Fig. 5 is a cross-sectional view taken along the line B-B in Fig. 4. This is a cross-sectional view showing a state where it is heated by a burner. FIG. 6 shows a cross-sectional view of the water level detection sensor with scale attached to it. FIG. 7 shows a cross-sectional view of the state in which it is attached to the inner wall of the can. 1... Heat source, 2... Can body, 4... Water supply port, 5
...Steam outlet, 10,11...Solid.

Claims (1)

[Claims] 1. A can body having a steam outlet and a water supply port, a heating source that heats the can body to boil the water inside, and a large number of heat sources that have a specific gravity higher than the water put into the can body and that are insoluble in water or hot water. A steam generator with a solid and a number of solids that are lighter than water and insoluble in water or hot water.