JPH01169205A - steam generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a steam generating device that fills a bathroom or the like with steam, heats the air in the bathroom, and uses the steam in a sauna or the like.

Conventional technology A steam generator of this type that generates steam by boiling water has a can body 21 and a can body 2, as shown in FIG.
A steam outlet 24 is provided in the space above 1, and a water supply port 2 is provided in the water below.
3, and a large number of fins 2 welded around the outer periphery of the can body 21.
2 absorbs the combustion heat of the burner 20, and the water 30 in the can body 21
is boiled by adding pjH to generate steam 31, which is then steamed from the steam outlet 24 (a steam pipe 32 that sends 31 out of the vessel).
In addition, a drain valve 28 using an electromagnetic method was provided to drain the water 3o in the can body 21. In other embodiments, electric or manual gate valves, globe valves, and angle valves have been used.

In the above configuration, by continuously generating steam, the water 30 in the can body 21 decreases, but the water level is always maintained at both levels by the upper water level sensor 25 and the upper water level sensor 26 provided inside the can body 21. Water is replenished into the can body 21 from the water supply port 23 so as to maintain the water level within the range where the water level sensor is located. Since the water 30 in the can body 21 is constantly boiling and evaporating, scale components (calcium, magnesium, silica, etc.) contained in the water precipitate and concentrate, and adhere to the inner wall of the can body 21 by one inch. (shown in Figure 6). Note that the attached scale 34 is removed from the water 30 inside the can when the steam generator is stopped.
As the water is drained, the can body 21 is rapidly cooled and contracts. At this time, due to the difference in thermal expansion coefficient between the can body 21 and the scale/I/34, the scale pieces 34' are separated and fall to the lower part of the can body 21. The scale piece 34' is
At the time of draining, the water is discharged from the drain valve 28 together with the water 30 inside the can.

Problems to be Solved by the Invention However, the scale piece 34' does not cover the valve 29 and the valve seat 3.
5 and the valve would not close, resulting in water leakage, causing a problem in which even if water was supplied into the can body 21, the water would not reach the water level where the water level sensor was located.

In order to solve this problem, a filter 36 was installed upstream of the drain valve 28, but the problem was that the filter became clogged, making it impossible to drain water, and that the filter 36 had to be cleaned frequently. Occurred.

In order to solve the problem described in (ii) above, a configuration was used in which the water to be replenished is used to remove the skeletal components contained in the water by a water softener 33 or the like connected to the water supply pipe 27.

However, with the above configuration, it is necessary to regenerate the ion exchange resin used in the water softener 33 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 has had the problem of imposing a labor and economic burden on general users who use sauna equipment.

The present invention solves these conventional problems and eliminates the need for expensive and complicated water softeners. It is an object of the present invention to prevent water leakage from a drain valve due to encroachment of scale pieces with a simple device without providing any complicated device.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a can body having an outlet and a water inlet, a heating source for heating the can body to boil water inside the can body, and a can body having an outlet and a water inlet. This is a steam generator that has a water supply pipe that sends water to the can body, a drain pipe that drains water from the can body, and a drainage pipe that uses a ball valve for the drainage pipe.

Effect: With the above configuration, the ball valve can have an opening ratio of 100% when scale pieces inside the can are discharged together with water during drainage, and the scale pieces are smoothly discharged and one bite is removed. Scale pieces can be shredded and discharged.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIGS. 1 to 4, a burner 1 serving as heating means is disposed across a combustion space that is inclined downwardly in a can body 2. Inside the can body 2, there is a steam outlet 5 in the upper space, a water inlet 4 in the lower water, and a water level sensor 6 that controls opening and closing of the water supply valve based on a water level signal to keep the water level in the can body 2 within a certain range. A water level sensor 7 is provided on the outer peripheral surface of the can body 2.
A large number of fins 3 that absorb the combustion heat of the burner 1 are welded together. Furthermore, the water supply port 4 of the can body 2 and the connected water supply pipe 8
A drain pipe 9 is provided branching off from this water supply pipe 8, and a drain valve 10 using an electric ball valve consisting of a bow/L/11 rotated via a shaft 14 by a motor 15 is installed in the middle of the drain pipe 9. The electric drain valve 10 is configured with a high torque using a reduction gear, and has a force (ffi) that shears the scale pieces to ff1i lj-. In the figure, 12 is the valve seat. , 13 is a seal packing.

[) In the configuration described in (1), the fins 3 absorb the combustion heat due to combustion in the burner 1, and the water 17 in the can body 2 is heated and boiled to generate steam 18. Steam generated18
is sent out from the steam outlet 5 through the steam pipe 20. Although the water 17 in the can body 2 evaporates and decreases, water is replenished from the water supply port 4 so that the water level is maintained within the range where the upper water level sensor 6 and the upper water level sensor 7 are located. Since the water 17 in the can body 2 is always boiling, the scale components contained in the water precipitate and concentrate, and adhere to the inner wall of the can body 2 (
(see Figure 2), the drain valve 1
0 is opened, and the water 17 in the can body 2 is drained. Due to the drainage, 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 19, the scale 19 is peeled off and falls to the lower part of the can body 2 as scale pieces 19'. The fallen scale pieces 19' are discharged from the drain valve 10 together with the water 17 inside the can.

Note that 1) As mentioned in II, the ball valve can be opened 100%, and the scale pieces 19' can be easily discharged, and
Since it is configured with high torque, the ball 11 and valve seat 12
The scale pieces 19' can be easily sheared off (as shown in FIGS. 3 and 4), so that the scale pieces 19' will not get caught in the drain valve.

Effects of the Invention As described above, according to the present invention, the following effects can be expected.

(1) By using a ball valve that can open 100%, scale pieces can be discharged reliably, and since the scale pieces are sheared and discharged, they do not get caught in the drain valve and water leakage does not occur. do not have.

(2) Compared to conventional water softeners, water purifiers, etc., it has a simple structure and is therefore low cost.

(3) Furthermore, there is no need for regeneration work required for water softeners, etc., or replacement work for ion exchange resins, and there is no economic or labor burden on users.

[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 taken along line A-A in FIG. 1, and FIGS. 3 and 4 are drain valves of the present invention. FIG. 5 is a longitudinal sectional view of a conventional example, and FIG. 6 is a sectional view taken along line BB in FIG. 5. 1...Burner, 2...Can body, 3...Fin, 4...Water inlet, 5...Steam outlet, 9...
Drain pipe, 10...Drain valve, 11...Pole,
12 Valve seat, 19'...Scale piece. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 Figure 5

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 using a ball valve as the drain valve.