JP2953129B2 - 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, as shown in FIG. 4, a steam generator of this type has a can 21 for generating steam by boiling water.
A burner 23 serving as a heating source is disposed below a combustion chamber 24, and a large number of fins 22 for absorbing the heat of combustion of the burner 23 are welded to the outer periphery of the can body 21 to heat water in the can pair 21. Then, steam 28 is generated. The can body 21 includes a can body main part 21a connected in a watertight manner and a flange part 21b for closing one side opening of the can body main part 21a.
1b has a detachable configuration.

[0003] By detaching the flange portion 21b, the accumulation status of the scale 29 in the can 21 is checked, and the steam discharge pipe 25 and the steam pressure outlet pipe (not shown, the water level of the can 21 is reduced). (Connect to the water level sensor room to be detected)
26, the water supply / drainage pipe 27, and the scale 29 deposited on the can body 21 are configured to be easily peeled off, that is, maintenance is facilitated.

[0004]

However, in the structure of the can 21 for generating steam, as shown in the figure, a sufficient distance l between the water surface s and the steam discharge pipe 25 or the steam pressure outlet pipe 26 is required. It is difficult to do. Then, the scale components (calcium,
An insoluble component such as magnesium or silicon) is supplied to the steam discharge port 25a of the steam discharge pipe 25 provided in the space above the can body main part 21a and the fram part 21b, the steam pressure outlet 26a of the steam pressure outlet pipe 26, Body part 21a and flange part 2
The scale 29 is deposited on the entire can body 21 including the junction 1b and the vicinity of the water supply / drain port 27a of the water supply / drain pipe 27 by concentration of the boiling water w. As shown in FIG. 5, since only part D, which is the majority of the main body 21 a, is within the heating zone of the combustion chamber 24, the temperature of the can itself is high and the expansion and contraction is large in this part D. The scale 29 is automatically peeled off due to the difference in expansion and contraction. In addition, the can main body 21a
Since the side surface (part E) is outside the heating region, the temperature is low and the difference in expansion and contraction is small, so that automatic peeling is small and the amount of scale 29 deposited is large. In addition, forcible peeling of the scale 29 at the portion E is difficult because the portion E is located on the opposite surface of the flange portion 21b and is deep. Further, when the scale is deformed or damaged by an acute-angled member or the like used at the time of forced peeling maintenance of the scale, there is a problem that the entire can body must be replaced.

[0005] Therefore, the present invention is scale of the can body part - reduces Le deposition, maintenance can be easily re-use the easy can body, and the durability superior to provide a steam generator Aim.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, a can body used in the steam generator according to the present invention is provided with a can body body and a detachable body for closing the can body.
It consists of a steam-water separating flange, small in the flange portion
At least steam discharge pipe, steam pressure outlet pipe, plumbing pipe and temperature
A degree sensor is provided, and a portion other than the vicinity of the flange portion of the can body is heated by a heating source.

[0007]

By the above means, the steam generator of the present invention can reduce the scale accumulation on the can body due to the difference in thermal expansion and contraction between the can body and the scale, and can be detached.
Since it is only necessary to forcibly peel off only the scale deposited on the steam-water separation flange, simple and easy maintenance is possible, and the can body can be reused and the durability can be improved. . In addition, at least steam
Air discharge pipe, vapor pressure outlet pipe, plumbing pipe and temperature sensor
By providing the same, various components of the flange portion are also the same.
Expands and contracts under the same conditions to reduce scale buildup on pipes, etc.
And it can generate steam stably
In addition, the scale can be easily peeled off.

[0008]

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.

FIG. 1 shows an embodiment of the present invention. A steam generating can body 1 for generating steam by closing the surroundings is shown in FIG.
a and a detachable side flange portion 1b, and a metal member such as copper, brass, stainless steel, or titanium is used as the material. An electric heater 6 is used as a heating source,
a is wound around the outer peripheral surface (part A) and disposed on the side surface (part B). On the other hand, the side flange portion 1b is located outside the heating area (H) shown in FIG. 3, and a steam discharge pipe 2 and a steam pressure outlet pipe 3 (not shown, but a water level sensor chamber for controlling the water level of the can 1) are provided in the upper space. ), Plumbing pipe 4 in the lower water,
A temperature sensor 5 (using a high limit switch to stop the electric heater 6 when the temperature of the can 1 exceeds a certain temperature) for keeping the safety of the can 1 is attached.

When a predetermined amount of water 7 is supplied into the can body 1 through the water supply / drainage pipe 4, the electric heater 6 receiving a signal from the water level sensor chamber connected to the water supply / drainage pipe 4 and the vapor pressure discharge pipe 3 turns the electric heater 6 on. Body 1
The water 7 is gradually heated to a boil. When the water 7 boils, steam 8 is generated and discharged out of the can 1 through the steam discharge pipe 2. When the water 7 in the can 1 is reduced, the water 7 is supplied to the can 1 through the water supply / drain pipe 4 in response to a signal from the water level sensor chamber. When the steam 8 is generated almost continuously in this way, the scale 9 gradually adheres and accumulates on the entire pipes 2, 3, 4 and the can body 1. When the accumulation of the scale 9 increases,
Each of the pipes 2, 3, and 4 is clogged by the scale 9, so that the steam 8 cannot be discharged or the water supply and drainage cannot be performed. Further, the temperature of the temperature sensor 5 mounted near the water surface S of the side flange 1b rises due to the heat insulating action of the scale 9 (which serves as a heat insulating material between the water 7 and the side flange 1b).

In order to maintain the safety of the can 1, it is sometimes necessary to check the condition of the accumulation of the scale 9 in the can 1. The state of deposition of the scale 9 at this time is shown in the figure. That is, in the heating area (H), in particular, the accumulation state of the scale 9 is remarkably different between the side B portion of the can body main portion 1a and the side C portion of the side flange portion 1b. This means that the difference in expansion and contraction differs greatly depending on the operation and stoppage of the electric heater 6 disposed in the section B.
The scale 9a deposited on the side B of the can body 1a is automatically reduced due to the difference in expansion and contraction between the metal and the ceramic (scale).

Here, as reference values, metal (copper) and CaC
The thermal expansion coefficient α of O ₃ (the average value between 0 and 100 ° C.)
0.167 * 10 ^-4 , 0.035 to 0.044 * 10 ^-4
There is a difference of about 1 order (Cited literature; Handbook of Standard Mechanical Design Charts, revised and supplemented 2nd edition, page 24-18, published by Kyoritsu Shuppan Co., Ltd.).

FIG. 2 shows another embodiment of the present invention.
The first can body portion 11a is heated by a burner 10 as a heating source located inside the combustion chamber 12 below a portion A and a portion B other than the vicinity of the side flange portion 11b as a heating zone (H).
The side flange 11b and the vicinity 11c of the side flange 11b of the can body main body 11a are located outside the combustion chamber 12.
The combustion gas of the burner 10 heats the heating zone (H) of the can body main part 11a as shown by the arrow in the figure, and also heats the part B differently from the conventional example. Then, as in the embodiment of FIG.
The part also expands and contracts under the same conditions as the part A, and the accumulation of the scale 13 can be reduced.

[0014]

As is clear from the above description, the can body
The scale accumulation on the main body can be reduced,
Function can be easily restored, and the can body can be reused for durability.
It can be excellent.

Further, the steam discharge pipe of the flange portion and the steam pressure guide are provided.
Remove the scale attached to the outlet pipe, plumbing pipe and temperature sensor.
Can be easily peeled.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a steam generator according to the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a schematic diagram of the heating area H;

FIG. 4 is a sectional view showing a conventional steam generator.

FIG. 5 is a schematic diagram of the heating area.

[Explanation of symbols]

 1, 11 can body 1a, 11a can body body 1b, 11b side flange 2 steam discharge pipe 3 steam pressure outlet pipe 4 supply / drain pipe 6 electric heater 10 burner

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor: Masatomo Yoshimura 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-163505 (JP, A) Japanese Utility Model 2 -128038 (JP, U) Jikken 17-536 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F22B 5/00 F22B 37/54

Claims (1)

(57) [Claims] 1. Heated by a heating source and closed around
The body for steam generation is attached to and detached from the body itself with a lid.
And at least a steam discharge pipe, a steam pressure outlet pipe, a water supply / drain pipe, and a temperature sensor are provided in the flange section, and the vicinity of the flange section of the can body body section is provided.
Other than the above, a steam generator that is heated by a heating source .