JP2841925B2 - 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 Conventionally, a steam generating apparatus that generates steam by boiling water of this type contains a trace amount of scale components in the steam.

In a general still, there is no scale component (insoluble components such as calcium, magnesium and silicon) in steam. Because the production of distilled water is obtained by cooling the steam. At this time, since the distance between the boiling water surface and the steam discharge portion is large, the steam-water separation is sufficiently performed.

On the other hand, in the small-sized steam generators shown in FIGS. 3A and 3B, it is difficult to keep a sufficient distance l between the boiling water surface and the steam discharge portion, so that the steam-water separation is inevitably deteriorated. Therefore, when the interface between the boiling water and the steam 28 is viewed microscopically, when the steam 28 is generated at the interface of the boiling water, the scale component concentration becomes high at the interface of the boiling water, and a fine scale is generated. This fine scale is contained in the steam 28 due to the scattering of boiling water, and the scale 39 easily adheres and deposits near the steam pressure inlet 29 and the steam discharge part 26.

[0005] A burner 21 as a heating means is disposed below a can 22 with a combustion chamber 24 having a certain combustion space interposed therebetween. A large number of fins 23 for absorbing the heat of combustion of the burner 21 are welded to the outer peripheral surface of the can body 22. The can body 22 has a water supply port 25 provided at the lowermost part, a vapor pressure introduction port 29 communicating with a space above and above the water surface, and a water supply pipe 30 connected to the water supply port 25 communicating with the can body 22.
A water level sensor chamber 34 connected to the vapor pressure inlet 29 via hoses 32 and 33 and arranged at a position that is the same as the water level of the can body 22, and a water level sensor chamber 34
A high water level sensor 35 and a low water level sensor 36 are provided therein.

[0006] In the above configuration, a vapor pressure inlet 29 communicating with the inside of the can 22 is provided in the horizontal direction.

[0007]

However, since the steam pressure inlet 29 is provided in the horizontal direction, the boiling water in the can 22 scatters to the steam pressure inlet 29, and the steam pressure inlet 29 is scattered. The scale 39 accumulates and stays in the tube of the hose 33. Since the scale 39 is deposited, the vapor pressure inlet 29 is closed, and water supplied from the water supply pipe 30 does not flow into the inlet 31.

As a result, water does not flow into the water level sensor chamber 34, and the water level sensor 1 for stopping water supply into the can body 22 is provided.
5 does not detect, the feed pump remains running. Then, the inside of the can 22 is filled with water, and the water overflows from the steam discharge port 26, so that there is a problem that normal operation cannot be performed.

Accordingly, the present invention is to provide a steam generator which is excellent in durability by reducing the scale accumulation at the steam pressure inlet.

[0010]

Means for Solving the Problems In order to achieve the above object, a steam generating apparatus according to the present invention has a steam pressure inlet to a water level sensor chamber formed on a side surface of a steam generating can body. A connection part of the steam pressure introduction path communicating with the steam pressure introduction port to the steam pressure introduction port is inclined upward.

[0011]

According to the above-mentioned means, even if the water in the can boils and scatters to the vapor pressure inlet, boiling water (high-temperature water) drops because the vapor pressure introduction passage at the connection portion is inclined upward, Water is less likely to stay in the vapor pressure introduction path, and the residence time is shorter. Then, generation and accumulation of scale can be effectively reduced.

[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 serving as heating means is provided with a combustion chamber 4 provided below a can body 2 interposed therebetween.
Are arranged. A large number of fins 3 for absorbing the heat of combustion of the burner 1 are welded to the outer peripheral surface of the can body 2. Can 2
A water supply port 5 provided at the lowermost part, a vapor pressure introduction port 9 provided on a vertical side surface of the can body communicating with a space above the water surface, and a water supply pipe connected to the water supply port 5 of the can body 2 10, a water supply inlet 11 branched from the water supply pipe 10, a steam pressure inlet 9, and a water supply inlet 11 which are connected via hoses 12 and 13 (which become steam pressure introduction paths), respectively, and 2, a water level sensor chamber 14 disposed at a position that is the same as the water level, and a water level sensor 15 and a low water level sensor 16 in the water level sensor chamber 14.
Connecting portion 13 of hose 13 connected to vapor pressure inlet 9 communicating with the side surface of the upper space of can body 2 having a structure provided with
“a” is configured to incline upward with respect to the water surface in the can body 2.

In the above embodiment, the fins 3 are heated by the combustion of the burner 1, and absorb the combustion heat to transfer the heat to the can. This heat causes the water 7 in the can 2 to boil and generate steam 8. This steam 8 is sent out of the vessel through the steam discharge pipe 17 from the steam discharge port 6. The water 7 in the can 2 vibrates violently due to boiling, and a water level sensor chamber 14 is separately provided to stably detect the surface of the water 7 in the can 2. Vapor pressure inlet 9 communicating with the side of the space above can 2
And the pressure at the inlet 11 and the water level sensor chamber 14 branched from the water supply pipe 10 connected to the water supply port 5 provided at the lowermost part of the can body 2 become the same pressure via the hoses 12 and 13. .

Since the water 7 in the can 2 repeats evaporation by boiling, the water 7 is supplied by the water supply pump 18. However, even if the water 7 is supplied, the scale component of the water 7 in the can 2 remains concentrated. This concentrated water 7
Even if the (boiling water) scatters from the vapor pressure inlet 9 to the connecting portion 13a of the hose 13 inclined upward with respect to the water surface, the scattered water drops on the inclination and the amount of retained water is small, and the scale 19 is significantly deposited. It can be reduced. For this reason, there is no clogging of the scale 19 of the vapor pressure introduction port 9,
The upper water level sensor 15 and the lower water level sensor 16 of the water level sensor chamber 14 separately disposed from the can body 2 can be normally operated.

The angle of the connecting portion 13a of the hose 13 connected to the steam pressure inlet 9 is inclined upward at least 2 degrees.
° or more, preferably 5 ° or more. In our endurance test, when the upward inclination angle was 2 ° or less, the effect of preventing scale clogging could not be exhibited. That is, no difference was observed in the scale deposition amount. In addition,
The vapor pressure inlet 9 may be provided perpendicular to the water surface.

Next, another embodiment of the present invention will be described with reference to FIG. 2. As a more effective means for preventing scale clogging of the vapor pressure inlet 9, a connection of a hose 13 inclined upward as in the above embodiment is provided. The projection 13b is formed by projecting the portion 13a into the can body 2. The protrusion 1
3b prevents the water 7 (boiling water) scattered on the upper part of the side wall surface 2a of the can 2 from dropping directly to the upper opening of the vapor pressure inlet 9 and accumulates on the upper part of the vapor pressure inlet 9 Scale 19 to be reduced.

The projecting dimension of the projecting portion 13b is at least 2 mm or more, preferably 5 mm or more. In our endurance test, when the protrusion size was 2 mm or less, the effect of preventing scale clogging could not be exhibited. That is, no difference was observed in the accumulation at the upper part of the vapor pressure inlet 9.

[0019]

As described above, the steam generator according to the present invention can reduce the scale accumulation at the steam pressure inlet portion caused by the scattering of boiling water in the can body. The function of the water level sensor chamber can be extended.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part showing another embodiment of the present invention.

FIG. 3A is a configuration diagram showing a conventional steam generator, and FIG. 3B is an enlarged sectional view of a main part of the same device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner 2 Can body 5 Water supply port 6 Steam discharge port 9 Steam pressure inlet 13 Hose (steam pressure introduction path) 13a Connection part 13b Projection 14 Water level sensor room

Continuing from the front page (72) Inventor Masatomo Yoshimura 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-147203 (JP, A) JP-A-58-155317 ( JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) F22B 37/38 F22D 5/06

Claims (2)

(57) [Claims] 1. A can body that is heated by a heating source to generate steam, a water supply port and a steam discharge port that communicate with the can body, and are provided on a side wall surface of the can body so as to communicate with a space above a water storage surface of the can body. A steam pressure inlet, a water level sensor chamber having a lower portion connected to a water supply port, and an upper portion connected to the steam pressure inlet, respectively, and a connecting portion of a steam pressure introducing passage connected to the steam pressure inlet is located outside the can body. A steam generator configured to incline. 2. The steam generator according to claim 1, wherein a connecting portion of the steam pressure introducing passage protrudes into the can body.