JPH0723790B2 - Steam generator - Google Patents

Description

The present invention relates to a humidifying device using steam for preventing indoor drying when an electric stove or the like is used, and particularly to improve steam generating efficiency of the device and prevent hot water from scattering from a steam generating port. It is intended for.

In a humidifier that heats water by boiling it and humidifies it with steam generated, in the case where the boiling water is made vertical and obtained inside a hollow metal pipe with a heater for heating wound around it, the steam is Although it is generated vigorously from the opening at the upper end, when a large bubble generated in boiling hot water floats and bursts on the liquid surface, the hot water scatters and spouts with steam to cause burns or a steam generation port. There was a problem of getting the periphery of the to wet with the scattered hot water.

The present invention has been made in view of the above point, and one embodiment thereof will be described below with reference to the drawings. (1) is an electric stove body,
A tubular heater (4), which is provided with a reflector (3) on the front surface of the housing (2) and radiates heat rays to a position in front of the reflector.
(4) is stretched and the front surface thereof is covered with a protective guard (5).

(6) is a steam generator installed in the casing (2),
The steam generating port (7) is projected from the upper wall (8) of the stove body (1).

Thus, the steam generator (6) is mainly a water storage tank (9).
And a steam generating pipe (10) arranged in parallel on one side thereof. The water storage tank (9) has an air vent hole (1
1) is formed and a molded body of a synthetic resin material is formed by extending a connecting pipe (13) with an opening (12) facing upward on one lower side.

One of the steam generating tubes (10) is a hollow metal pipe (14)
And a heating heater (15) wound around the outer periphery in the vertical direction, and a funnel-shaped steam generation port (7) connected to the upper end of the hollow metal pipe (14). (10) is connected to the connecting pipe (13) of the water storage tank (9) so as to face each other, and the outer peripheries thereof are integrally connected by a connecting pipe (16).

(17) is inserted vertically into the center of the hollow metal pipe (14) and its lower end extends below the lower end of the heater (15) for heating. A bumping preventive body formed of a material, a metal core (18) is provided at the center, a silicon tube (19) is fitted on the outside thereof, and a rough surface formed by braiding heat-resistant and water-resistant glass fibers on the outer surface of the tube ( 20) has formed. Anti-bumping body (17)
For fixing, the fixed pipe (20) that draws out the central metal core (18) slightly and connects the hollow metal pipe (14) and the steam generation port (7)
It is held in place.

In such a structure, when a predetermined amount of water is poured from the steam generation port (7) with a measuring cup (not shown) or the like, the water is sequentially stored in the water storage tank (9). At that time, the air contained in the water storage tank (9) is sequentially discharged through the air vent hole (11) formed in the upper portion.

When a heater (15) for heating is energized after a predetermined amount of water has been injected, the water located in the steam generation pipe (10) is sequentially heated and boils, and the generated steam is discharged from the steam generation port (7). It is released.

In the steam generation process, if the bumping prevention body (17) is not provided in the hollow metal pipe (14), bubbles are slowly generated on the inner surface of the lower end of the hollow metal pipe (14), and large bubbles are generated. Becomes Finally, the buoyancy of the bubbles themselves causes them to separate from the inner surface of the pipe, pushing up the innumerable small bubbles generated in the upper layer as well, bursting on the liquid surface, and spattering hot water from the steam generation port (7). It is a thing. However, when the bumping prevention body (17) is provided as in the present invention, no bubbles are generated at the lower end of the hollow metal pipe (14). More specifically, the water in the steam generating tube (10) is heated and boiled by energizing the heater (15) for heating. Along with this boiling, bubbles are also generated from the lower part of the steam generating tube (10) corresponding to the lowermost part of the heating heater (15). The bubbles are accompanied by the rough surface (20) of the bumping prevention body (17).
The bubbles are evenly divided and prevented from increasing in size as the contact area increases by touching. Therefore, the bubbles generated in the hollow metal pipe (14) touch the rough surface (20) of the bumping prevention body (17) immediately after the generation and do not grow and rise as small bubbles.

In addition, it is preferable that the bumping prevention body has a length substantially equal to or larger than the vertical dimension of the heater.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a water storage tank having a connecting pipe extended to one side, and a hollow having a lower end connected to the connecting pipe of the water storage tank and an upper end opened to the atmosphere A metal pipe, a heater for winding up and down around the outer periphery of the hollow metal pipe, and a vertically inserted state in the hollow metal pipe, the lower end of which extends below the lower end of the heater for heating. In addition, since it consists of a bumping prevention body with a roughened outer surface, it suppresses the bubbles generated from the position corresponding to the lower end of the heating heater in the hollow metal pipe to a small range to prevent large growth. To do. As a result, no large bubbles are generated in the hollow metal pipe, hot water does not scatter on the liquid surface, and there is no risk of burns. Furthermore, the scattered hot water does not wet the table, equipment, etc., and vapor can be effectively generated.

In particular, since the lower end of the bumping prevention body is extended below the lower end of the heater for heating as described above, the bubbles generated from the lowermost part do not increase in size but rise in a small state. It is possible to prevent the boiling water from scattering due to the bursting of such large bubbles.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an electric stove equipped with the steam generating apparatus of the present invention, FIG. 2 is a vertical sectional view of the apparatus according to the present invention, and FIG. 3 is a partial sectional view of a bumping prevention body. (9) …… water storage tank, (13) …… connecting pipe, (14) ……
Hollow metal pipe, (15) …… Heating heater, (17) ……
Anti-bumping body, (20) ... rough surface

Claims (1)

[Claims] 1. A water storage tank having a connecting pipe extended to one side, and a hollow metal pipe provided in parallel with the water storage tank and having a lower end communicating with the connecting pipe of the water storage tank and an upper end opening to the atmosphere. A heating heater that is wound around the outer periphery of the hollow metal pipe in the vertical direction, and is inserted and fixed vertically in the hollow metal pipe and has its lower end extending below the lower end of the heating heater and Steam generator consisting of bumping prevention body with rough side surfaces.