JP2841929B2 - Steam generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam generator used for steam bathing, humidifying air conditioning, wet drying, a steamer, and the like.

[0002]

2. Description of the Related Art Heretofore, there are some steam generators provided with a pressure safety valve, and those which can remove scale by a steam trap (mainly for steam / water separation) in the middle of a steam transport pipe. Before explaining the conventional example, a factor that a trace amount of a scale component is contained in steam and a mechanism of scale adhesion will be described.

Generally, scale components (insoluble components such as calcium, magnesium and silicon) do not exist in steam. Because, the production of distilled water is obtained by cooling the steam. However, looking at the interface between boiling water and steam microscopically, when steam is generated at the interface of boiling water, the scale component concentration increases at the interface of boiling water, and a fine scale is generated. This is because the fine scale is contained in the vapor.

In the configuration of the steam generator and the steam discharger shown in FIGS. 6, 7, 8 and 9, the steam generator 21
The steam 31 generated inside is sent to the steam discharge device 25 provided in the bathtub 24 in the bathroom 23 by the steam transfer pipe 22 and discharged into the water in the bathtub 24. On the other hand, the steam discharge device 25 is provided with a steam discharge port main body 26 provided to protrude into the water in the bathtub 24 and a steam 31 formed by molding granular polypropylene or the like.
A silencer 27 having a porous body through which a thin portion (a portion) is provided, a hole b portion facing the thin portion of the silencer 27, and opened into the bathtub 24. A cap 29 having an opening 28 is provided. This cap 29
The silencer 27 is fixed to the steam outlet main body 30.

In the above configuration, the steam 31 sent from the steam generator 21 through the steam carrying pipe 22 is supplied to the bathtub 2.
4 is discharged from the opening 28 into the water, the water 32 is heated, and the bath can be boiled. However, since the steam 31 generated by the steam generator 21 contains a small amount of scale components as described above, the steam discharge device 2
As shown in FIG. 8, the scale 33 gradually adheres to the inner surface of the muffler 27 of FIG. As the clogging progresses, the pressure applied to the inside increases. At this time, the portion a of the thin portion provided on the silencer 27 is broken by pressure and opens as shown in FIG. 9, and the silencer piece 27 ′ and the steam 31 enter the water in the bathtub 24 through the hole b of the cap 29. After being released, the internal pressure of the steam discharge device 25 decreases and returns to the normal pressure. Therefore, the steam generator 21 and the steam transport pipe 22 are devised so as to prevent damage.

[0006]

However, since the steam 31 containing the scale component is discharged into the water from the hole b of the silencer 27 of the steam discharge device 25, the bathtub 2
The water in 4 gradually becomes cloudy due to the scale 34. In addition, since the muffler 27 is damaged, fragments of the muffler piece 27 'are scattered in the bathtub 24, which is extremely dangerous during bathing. Further, since the muffler 25 is damaged, it has disadvantages and problems such as necessity of replacement.

On the other hand, when the inner diameter of the steam transfer pipe 22 is small or when the pipe is bent at a large scale, scale is deposited in the pipe, and the steam generator 21 and the steam transfer pipe 22 are damaged, and need to be replaced. There were also some problems.

Accordingly, the present invention is to solve the above-mentioned problems of the prior art, and to provide a durable steam generator which reduces the accumulation of scale on a steam transfer pipe and a steam discharge device. is there.

[0009]

Means for Solving the Problems In order to achieve the above object, the means of the steam generator according to the present invention uses a small amount of scale component contained in the steam discharged from the can body to a part of the steam transfer pipe. The steam is removed by the turbulence part provided to make clean steam. The turbulence part and the second pressure safety device are provided in the steam generator.

[0010]

According to the above-mentioned means, the steam generator of the present invention comprises the steam discharged from the can in the form of a turbulent portion provided in a part of the steam transfer pipe, that is, a plurality of scale attached bodies. The steam is made to flow while being turbulent, and a small amount of scale components contained in the steam are removed by a disturbing adhesion action.

When the turbulence portion is clogged by the scale, the second pressure safety device provided on the upstream side of the turbulence portion operates to stop the generation of steam.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the steam generator according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a burner 1 as heating means is disposed below a combustion chamber 4 connected to a can body 2. The can body 2 includes a fin 3 for absorbing the heat of combustion of the burner 1, a water supply port 6 connected to a water supply pipe 5 for supplying water, and a steam discharge port 7 for discharging steam 11 generated by heating and boiling the water. It comprises a connected steam discharge pipe 8 and a pressure safety device 12. Steam discharge pipe 8 and steam transfer pipe 9
Are connected by a hose 4, a turbulent flow section 10 is provided in a part of the steam transfer pipe 9, and a second pressure safety device 12a is provided upstream of the turbulent flow section 10. It is a configuration installed above the water surface. More specifically, steam 11 generated from boiling water in the can body 2 is discharged from a steam discharge pipe 8 provided in a space above the can body 2, and a turbulent flow portion provided in a part of the steam transport pipe 9. Enter 10. The steam 11 that has entered the turbulent flow section 10 is gradually dissociated with scale components while being disturbed, becomes clean steam 11 ′, and is sent out of the vessel (to the steam discharge device 14 of the bathtub 13). FIG.
4 to 4 show detailed cross-sectional views of the first to third embodiments of the turbulent flow section 10, in which a scale attached body 10b is provided in a main body case 10a. Now, the difference between the first embodiment and the third embodiment will be described. In the first embodiment (see FIG. 2), the main body case 10a is
Each of the chambers is divided into chambers, and scale adhering bodies 10b each having an irregular (wave) shape are provided at the lower part of the chamber A and the upper part of the chamber B. The steam 11 sent from the steam transfer pipe 9 first strikes the scale adhering body 10b in the lower part of the chamber A, causing a turbulent flow phenomenon. The scale adhering body 10b in the upper part of the chamber B has a purpose of re-removing a trace amount of scale components that could not be removed in the chamber A, and obtains a cleaner steam. is there. In the second embodiment (see FIG. 3), a plurality of U-shaped scale attached bodies 10b are provided.
This shows a multi-step removal method. In the third embodiment (see FIG. 4), a plurality of chambers are provided by plates, and each shows a multi-stage removal system. Although not shown, the scale adhering body 10
As means for increasing the removal efficiency of b, a porous body having a relatively large opening, a wire mesh, a perforated plate, a winding, and the like,
These may be combined. Next, in the fourth embodiment (see FIG. 5), the scale attached body 10b is configured to be detachable, and the main body case lid in which the main body case 10a and the plurality of V-shaped scale attached bodies 10b ′ are detachably attached. 1
0a '. The configuration in which the main body case lid 10a 'is attached to the main body case 10a is shown. When a large amount of scale 15 is deposited and clogged on the V-type scale attached body 10b ', the scale 15 is provided on the steam transport pipe 9 (upstream of the turbulent flow section 10) before the pressure safety device 12 provided on the can body 2. The second pressure safety device 12a operates to stop the combustion. For example, the second
The pressure safety device 12a has a switch mechanism and sends an operation stop signal to the controller. The second pressure safety device 12a must operate at a lower pressure than the pressure safety device 12 of the can body 2. This is because the pressure safety device 12 of the can 2 guarantees the safety of the entire steam generator, and the scale is deposited on the steam discharge port 7 or the steam discharge pipe 8 provided in the space above the can 2. This prevents the can body 2 from being damaged due to a rise in pressure when it becomes clogged. From the above,
By setting the operating pressure of the second pressure safety device 12a lower than that of the pressure safety device 12 of the can body, clogging of the turbulent flow section 10 is managed and safety of the can body 2 is assured. In this way, when the second pressure safety device 12a operates, for example, even if the bathtub 13 is filled with water, the main body case cover 10a '
Is removed, the V-shaped scale attached body 10b 'attached to the body case lid 10a' is replaced, and the body case 10a is
It is to be attached to. Thus, it is possible to prevent the scale from adhering to the steam discharge device 14 attached to the bathtub 13. In addition, although not shown, it is also within the scope of the present invention to replace the main body case 10a 'with the main body case 10a' being attached to the V-shaped scale attached body 10b '.

[0014]

As is clear from the above description, the steam generator of the present invention is provided with a turbulence section and a second pressure safety device in a part of the steam conveying pipe. Removes trace amounts of scale components contained in the steam transport pipe,
And various steam utilization equipment, for example, without the removal of water from the bathtub and without the scale depositing on the steamed food,
If the pressure increases due to the accumulation of large scale in the turbulence,
Since the pressure relief device operates to release the pressure, it is very useful and can have excellent safety and durability.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a main part of a steam generator according to the present invention.

FIG. 2 is a configuration diagram showing a first embodiment of a turbulence section of the apparatus.

FIG. 3 is a configuration diagram showing a second embodiment of a turbulent portion of the apparatus.

FIG. 4 is a configuration diagram showing a third embodiment of a turbulence section of the apparatus.

FIG. 5A is a side view showing a fourth embodiment of a turbulent portion of the apparatus, and FIG. 5B is a front view of the same.

FIG. 6 is a configuration diagram showing a main part of a conventional steam generator.

FIG. 7 is an enlarged sectional view of a main part of the apparatus.

FIG. 8 is an enlarged sectional view showing an operation state of a main part of the device.

FIG. 9 is an enlarged sectional view showing an operation state of a main part of the apparatus.

[Explanation of symbols]

 2 can 8 steam discharge pipe 9 steam transport pipe 10 turbulence part 10b scale attached body 12a second pressure safety device

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masachika Yoshimura 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-169100 (JP, A) -53304 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F22B 37/48 F22B 37/44

Claims (2)

(57) [Claims] 1. A turbulence section for removing scale components contained in steam is provided in a part of a steam transport pipe connected to a steam discharge pipe of a steam generating can body, and a turbulence section is provided upstream of the turbulence section. A steam generating device provided with a second pressure safety device which operates at a lower pressure than a pressure safety device provided in a can body, in a steam conveying pipe. 2. The steam generator according to claim 1, wherein the turbulent flow portion is constituted by a plurality of scale attached bodies, and the plurality of scale attached bodies are detachably provided.