JP2982438B2 - 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 FIG. 7 shows the main components of a steam generator for generating steam by boiling water of this kind. The can 21 of the steam generator includes a can main body 21a and a side wall 21b serving as a lid. The can body 21
a is a steam discharge pipe 22 in the upper space, and a steam pressure outlet pipe 23 in the space above the side wall 21b (connected to the water level sensor chamber 25).
And a water supply / drain pipe 24 is provided in the lower water. Looking microscopically at the interface (air-water surface) between the boiling water 29 and the steam 26,
When the steam 26 is generated at the interface of the boiling water 29, the boiling water 29
At the interface of, the scale component concentration increases and a fine scale is generated. The minute scale is mixed into the steam 26 in a very small amount and the boiling water 29 is scattered, so that the steam in the steam discharge port 22a of the steam discharge pipe 22 and the steam in the steam pressure introduction pipe 23 provided particularly in the space above the can body main part 21a. The scale 27 easily adheres and deposits near the pressure introduction port 23a. Although water is supplied to the can body 21 due to the evaporation loss of the boiling water 29 (under the control of the high water level sensor 25a and the low water level sensor 25b provided in the water level sensor chamber 25 for controlling the water surface of the can body 21). , The scale components are gradually concentrated and the can 2
The scale 27 is deposited on the entire can body 21 around the air-water surface 1. The scale 27 deposited and deposited causes a difference in expansion coefficient between the can 21 (for example, copper) and the scale (ceramic) due to the use or non-use of the can 21, that is, a temperature difference.
The scale piece 27a is peeled off from the bottom of the can 21. A drain valve 28 is provided below the water supply / drain pipe 24 in order to forcibly discharge the scale pieces 27a. When the drain valve 28 is opened simultaneously with the stop of the operation, the steam pressure P due to the boiling of the can 21 is obtained.
And forcibly discharge them.

[0003]

However, in the structure of the steam generating can body described above, the opening 24 of the water supply / drain pipe 24 is not provided.
Since a is merely a hole, various scale pieces 27a having different sizes and shapes tend to concentrate on the opening 24a and discharge. Therefore, the scale piece 27a 'close to the diameter of the opening 24a is clogged, which causes the small scale piece 27a "to be clogged, and finally the opening 24a is completely closed.
Water cannot be supplied or scale pieces 27
Since a is accumulated in large quantities, there is a problem that the safety of the can body 21 (temperature rise of the can body itself, water supply resistance becomes large, empty space due to insufficient water supply, etc.), and durability are remarkably reduced.

[0004] The present invention solves the above-mentioned problems, and provides a steam generator capable of preventing clogging of a water supply / drainage port with scale pieces and performing stable water supply / drainage.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a water supply / drainage opening provided in a can body used in the steam generator according to the present invention is provided with a scale piece drainage control device and a forced crushing device. A composite means is provided, and the drainage
The brace has a circular or elliptical cross section and is forcibly broken.
The crusher has a polygonal cross section .

[0006]

By the above means, the steam generator of the present invention utilizes the energy of the steam pressure P at the time of drainage of the scale pieces peeled in the can body, firstly, the scale pieces are subjected to impact crushing with a forced crushing tool, and then reduced into small pieces. Only the crushed scale pieces are regulated and discharged by the drainage regulating tool.

[0007]

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 a main part of the present invention,
The can body 1 that closes its periphery and generates steam by heating the stored water by the heating means includes a can body body 1a and a side wall 1b that forms a lid, and has a steam discharge pipe 2 on the upper surface. I have. The side wall 1b is provided with a steam pressure introduction pipe 3 (connected to the water level sensor chamber 8) and a water supply / drainage pipe 4, and the steam pressure introduction pipe 3 is provided in an upper space and the water supply / drainage pipe 4 is provided in a lower water. It is configured. At the opening 4a of the water supply / drain pipe 4 provided at the side wall 1b, a drainage control pin 5 serving as a drainage control tool for discharging the scale piece 7a is attached to the opening 4a of the scale piece 7a, and the upper end is attached to the side wall 1b. Lower end is plumbing 4
Are provided in the vertical direction in contact with the opening end face of the opening. The drainage control pin 5 is curved in an arc shape, and a horizontally and horizontally forced crushing pin 6 (also referred to as a forced crushing tool) is joined to a portion protruding into the can body 1 most.

FIG. 3 shows an operation model diagram of the drainage regulating pin 5 and the forced crushing pin 6 in the embodiment of the present invention. That is, the various scale pieces 7a (large), 7b (middle) and 7c (small) peeled off at the bottom of the can body 1 are firstly forcibly crushed by the pressure action in the can body 1 simultaneously with the drainage of the hot water. 6 and a part of the drainage control pin 5, and especially the large scale piece 7 a is
a ′, 7a ″... The middle scale pieces 7b are similarly subjected to 7b ′, 7b ″.
・ Shock crushed. On the other hand, the small scale pieces 7c are partially impact-crushed as described above, but are discharged from the water supply / drain pipe 4 through the space openings of the drainage control pins 5.
At this time, the scale pieces 7a 'and 7b' smaller than the space opening of the drainage control pin 5 are discharged from the water supply / drain pipe 4, but the large scale pieces 7a "and 7b" are temporarily filtered by the drainage control pin 5 (regulation). ), And is pushed back to the bottom of the can body 1 by water supply pressure when water is reused. By repeating such a water supply and drainage cycle, various peeled scale pieces 7a are subjected to impact pulverization and discharged without clogging the opening 4a of the water supply and drainage pipe 4, so that the safety and durability of the can body 1 are improved. It will be excellent.

FIG. 4 shows another embodiment of the present invention. The drainage control pin 5a has an arcuate upper and lower end portion abutting on the opening end face of the water supply / drainage pipe 4. And the drainage control pin 5a
Represents its cross section as a circle (FIG. 4c) or an ellipse (FIG. 4a).
And the cross section of the pin for forced crushing 6a is square (FIG. 4a).
Alternatively, it has a polygonal shape with an end face such as a triangle (FIG. 4c). Therefore, the forced crushing tool 6a is a scale piece 7a.
The impact crushing effect can be further improved at the end face portion, and the crushed scale pieces 7a can be smoothly discharged without resistance.

Next, FIG. 5 shows another embodiment of the present invention, and shows an example of the structure of a composite means of the drainage regulating pin 5 and the forced crushing pin 6 of the scale piece 7a. ),
(E), (g) are longitudinal sectional views, (b), (d), (f),
(H) is a front view. 9 shows a modification of the scale drainage control pin 5. Semicircular shapes (FIGS. 4a and b), square shapes (FIGS. 4c and 4d), triangular shapes (FIGS. 4e and f), and wave shapes (FIGS. 4g and h) were taken as representative examples.

FIG. 6 shows a modification of the forced crushing pin 6 in another embodiment of the present invention, in which (a), (c), (e),
(G), (i), (k), and (m) are cross-sectional views, and (b),
(D), (f), (h), (j), (l), and (n) show front views. One character shape (FIGS. 6a, b), two character shape (FIGS. 6c, d), X character shape (e, FIG.
f), H character shapes (g, h in FIG. 6), linear type (i, j in FIG. 6), R type (k, l in FIG. 6), and L type (m, n in FIG. 6) By way of example, composite pins of these various combinations are also within the scope of the present invention.

Although not shown, it is preferable to make the forced crushing pin 6 thicker than the drainage controlling pin 5.

[0014]

As more apparent in described in the foregoing, a steam generator of the present invention, the opening for plumbing formed in a portion of the can body, from the forced breaking tool and penetration restricting device of scale piece
And the drainage control device of this composite means
The cross section is circular or elliptical, and the forced crusher
Since the cross-sectional shape is a polygonal shape, the peeled scale pieces can be subjected to impact crushing using the vapor pressure P of the can body for each drainage, and only small scale pieces can be discharged to the water supply / drain pipe. The clogging due to the scale pieces in the portion is eliminated, and the supply and drainage to the can body can be normally performed, and the can body for steam generation can be made excellent in safety and durability.

In particular, according to the present invention, the impact crushing effect can be further improved, and the scale pieces can be prevented from being caught and the drainage can be made smooth.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a main part of a steam generator of the present invention.

FIG. 2A is an enlarged cross-sectional view of a portion where a water supply / drainage pipe is connected to a can body in the same device. FIG. 2B is a front view of the same portion in the same device.

FIG. 3 is an enlarged sectional view of a main part of the apparatus at the time of drainage.

4 (a) and 4 (c) are enlarged cross-sectional views of a portion where a water supply / drainage pipe is connected to a can body in the same apparatus. FIGS. 4 (b) and 4 (d) are front views of the same.

5 (a), 5 (c), 5 (e), and 5 (g) are enlarged cross-sectional views (b) of a connecting portion of a water supply / drainage pipe to a can body in the same apparatus.
(D), (f), and (h) are front views of the same.

FIG. 6 (a), (c), (e), (g), (i),
(H) and (m) are enlarged cross-sectional views (b), (d), (f), (h) and (b) of a connection portion of the water supply / drainage pipe to the can body in the same device.
(J), (l) and (n) are front views

FIG. 7 is a configuration diagram showing a main part of a conventional steam generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Can body 4 Supply / drain pipe 4a Opening 5,5a Drainage control pin (drainage control tool) 6,6a Forced crushing pin (forced crushing tool) 7a Scale piece

Continued on the front page (72) Inventor Takao Nishiyama 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References Hira 2-147606 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F22B 37/48 F22B 37/54

Claims (1)

(57) [Claims] 1. A boiled water is heated, and an opening for plumbing provided to the steam generator for a can body closed around, Tona and drainage restricting mechanism forced breaking tool scale pieces to the opening
And the drainage control device of the composite means is cut off.
Make the surface shape circular or elliptical, and the forced crusher
A steam generator with a polygonal surface .