JP2897497B2 - 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. 5 shows a main part of the structure of a water supply, drainage and a steam discharge section from a can body of a steam generator for generating steam by boiling water of this kind. When the operation of the device is started, the water supply pipe 22, the water supply / drain pipe 35 via the pump 24 is started.
More water is sent into the can 21. When the high water level sensor 27 in the sensor tank 34 detects that the can 21 is full, heat is applied to the can 21 and the water 26 inside boils over time.
The generated steam 33 is guided to a use location through the steam pipe 30. Heat is continuously applied to the can body 21 so that the internal water 26
When the low water level sensor 28 detects a decrease in water supply, the pump 24 restarts, and until the high water level sensor 27 detects the water supply pipe 2
2. Water is sent into the can 21 again through the water supply / drain pipe 35. Thereafter, the operation of supplying and reducing water is repeated while heat is applied to the can body 21. In addition, while the water 26 in the can 21 is boiling, the float 29 filled in the can 21 receives the energy by the boiling and disturbs, and the scale attached to the wall of the can 21 is peeled off. When the operation of the apparatus is automatically or forcibly stopped, the heat applied to the can 21 is shut off, the drain valve 25 is opened, and the water 2 in the can 21 is opened.
6 is discharged through the water supply / drain pipe 35 and the drain pipe 23. At this time, the water 26 inside the can 21
The scale precipitated in the inside and the separated scale pieces are simultaneously discharged.

[0003]

However, the scale pieces 31 having a large particle size which are not sufficiently crushed by the float 29 are used.
The a and 31b caused clogging of the scale at the opening 32 of the water supply / drainage pipe 35, the inside of the water supply / drainage pipe 35, or the operating part of the drainage valve 25 at the time of drainage, making it impossible to perform a smooth drainage operation. In addition, the float 29 in the can 21 is provided with the water supply / drainage pipe 3.
5 has a problem that the durability of the can body 21 which has been used for a long time is lacking, such as being caught in the opening 32 of the water supply 5 and causing clogging of the water supply and drain pipe 35.

[0004] Therefore, the present invention provides a steam generator in which the openings of the water supply port and the drainage port block large-diameter scale pieces during drainage.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, the means of the steam generator according to the present invention is in contact with a can body that closes the periphery to generate steam and a water storage in the can body. It is provided with an opening of a water supply port and a drainage port to be provided, a regulating piece arranged at a distance in front of the opening, and a water inlet formed three-dimensionally in the front of the opening by the regulating piece and the opening. is there.

[0006]

According to the above-mentioned means, in the steam generator of the present invention, the regulating piece provided on the front face of the opening of the water supply port and the drain port forms a three-dimensional water passage on the front face of the opening. The effective water passage area of the water passage is larger than the planar opening area of the opening, and the cross-sectional shape of the scale piece can be smaller than the cross-section of the opening. In this way, the passage of the particle size of the scale pieces entering the opening can be restricted, and even if the scale pieces are clogged, the blocking rate of the three-dimensional water inlet having a large effective water flow area is reduced, so that the water supply and drainage operation can be performed smoothly.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a steam generator according to the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows a first embodiment of the present invention. A cylindrical can body 1 has an opening 4 located under water below a side wall 2 forming a lid thereof. The water supply / drain pipe 3 is connected to the opening 4. A scale piece entry control pin (hereinafter, also referred to as a pin) 5 serving as a control piece is attached to an opening 4 serving as a water supply / drainage port of the can body so as to be positioned inside the can body 1. As shown in FIG. 2, the pin 5 is formed by bending a single wire to form a bend r, and is located in the middle of the water supply / drainage port 4a and protrudes into the can body 1 of the water supply / drainage pipe 3. Both ends are attached to the edge in the vertical direction. And, the opening inner diameter φD and the pin 5 have a pitch p.

[0008]

(Equation 1)

A three-dimensional water inlet P is formed. And this p becomes equal to φD because

[0010]

(Equation 2)

[0011]

(Equation 3)

This is when the bending r is 0.87D, and
If ≦ 0.8D, the opening 4 will not be closed by the large-diameter scale piece 1a. Also, if r is made too small, the pitch p becomes small, but the three-dimensional formation of the water inlet P decreases.
Therefore, it can be said that the pitch p is preferably set to about 0.5D ≦ p ≦ 0.8D.

When the heating (not shown) of the can 1 is automatically or forcibly terminated, the drain valve 7 attached to the drain pipe 8 is opened, and the boiling water 9 in the can 1 is released from the boiling water 9 in the can 1. The water is drained with a large water-passing power to the drain pipe 8 accompanying the pressure release.
On the other hand, the scale 6 which is deposited inside the can 1 and adheres to and accumulates on the wall surface of the can 1 is separated from the scale by the float 6 floating in the water colliding with the can 1 by boiling power. The exfoliated scale piece 10a flows toward the opening 4 together with the boiling water 9 at the time of drainage, and the pin 5 attached to the opening 4 is applied with a large water-passing force by the drainage to be crushed into a small particle size. .
This prevents clogging of the water supply / drain pipe 3, the drain pipe 8, and the drain valve 7 with the large-diameter scale pieces 10a.
In addition, it is possible to prevent the float 6 in the can 1 from catching on the opening 4. The scale piece 10a having a large particle size regulated by the pin 5 is pulverized by several floats 6 disturbed by boiling water during the next operation, and even if the water inlet P is closed, the effective water passage area increases and the blocking rate increases. And the drainage operation can be performed smoothly. (Embodiment 2) FIG. 3 shows a second embodiment of the present invention. The present embodiment is different from the above-described embodiment in that a scale piece entry control pin 5a and a pin 5b, whose wires are curved in an arc shape, are arranged crosswise by crossing the opening 4 vertically and horizontally with respect to water supply and drainage. Tube 3
Both ends are attached to the opening rim of the. As a result, the scale that has been separated and crushed in the can body by dividing the water-passing surface into four parts can be applied to the pins 5a and 5b at the time of discharge, so that the scale can be further finely crushed, and only those smaller than the scale pieces can be drained. In addition, the water inlet Q is formed more three-dimensionally,
The degree of prevention of scale clogging can be improved. (Embodiment 3) FIG. 4 shows a third embodiment of the present invention. This embodiment is different from the first embodiment in that the pin 15 is not attached directly to the water supply / drain pipe 3 of the opening 4 but a hole 16 for insertion is provided in the side wall 2 of the can. It is fixed by attaching.

The pins 15 are pins 15a, 15b, 1
It has five wires of 5c, the lower end aligned with the upper end to the horizontal line L when viewed from the front of the bending R ₂ addition, the lower surface (or upper surface)
Viewed from the provided bending R ₁ on the front surface of the flange 2, r bending viewed from the side is smaller at both ends. The water passage S is formed three-dimensionally and three-dimensionally, and the water passage formed by the horizontal line L and the bends R ₁ and R ₂ is several times larger than the cross section of the opening 4, and the opening inner diameter φD pitch p ₀ between each pin is held smaller than that. In this way, even if blockage of the scale piece increases due to an increase in the effective water flow area of the water flow port S, the effect of water supply and drainage can be reduced, and long-term durability can be maintained.

The pins 5 and 15 are detachably attached to the water supply / drain port 4 or the side wall 2, and can be easily replaced when it becomes difficult to separate the scale pieces when they are attached.

[0016]

As described above, in the steam generator according to the present invention, the regulating piece provided on the front face of the opening of the water supply port and the drain port is larger than the planar opening area of the opening on the front face of the opening. Since the three-dimensional water inlet is formed, the passage of the large-diameter scale pieces entering the opening can be restricted, and the clogging of the drainage channel can be prevented.

Further, even if the scale piece is clogged in the three-dimensional water supply port, the closing rate is reduced and the water supply / drainage operation can be performed smoothly.

[Brief description of the drawings]

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

FIG. 2 (a) is a top view of a water supply / drain port portion of the same device. (B) is a cross-sectional view.

FIG. 3 (a) is a vertical sectional view of a water supply / drain port portion in a second embodiment of the same device, and FIG.

FIG. 4 (a) is a vertical sectional view of a water supply / drain port portion in a third embodiment of the device, FIG. 4 (b) is a top view thereof, and FIG.

FIG. 5 is a configuration diagram showing a conventional steam generator.

[Explanation of symbols]

 1 can body 4 opening 5, 5a, 5b, 15 pin (regulating piece) P, Q, S water inlet

──────────────────────────────────────────────────の Continuing on the front page (72) Kazunori Sone, 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Takao Nishiyama 1006 Kadoma Kadoma, Kadoma, Osaka Matsushita Electric Industrial Co., Ltd. In-house (56) References Hikaru Hei 2-147606 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F22B 37/48 F22B 37/54

Claims (1)

(57) [Claims] 1. A can body for generating steam by closing its periphery, an opening for a water supply port and a drain port in contact with water stored in the can body, and a regulating piece disposed at a distance in front of the opening. And a steam generator having a water opening formed three-dimensionally on the front surface of the opening by the restriction piece and larger than the planar open area of the opening.