JPH073122Y2 - Electric boiler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an electric boiler used for supplying steam obtained by heating canned water to equipment such as an iron and a cooker.

[Prior Art] Conventionally, in an electric boiler, as shown in FIG. 12, an electric heater 1 such as a sheath heater is inserted from the upper opening of a heating pipe 2 to the inside of the heating pipe 2. A flange 3 is fixed to the electric heater 1, and the flange 3 is fixed to an upper portion of the heating tube 2.

That is, the heating tube 2 is provided in the vertical direction. An upper pipe header 4 and a lower pipe header 5 which are provided in the lateral direction are connected to the heating pipe 2 via a steam pipe 7 and a can water pipe 9.

A return pipe 8 is connected between the upper header 4 and the lower header 5.

A safety valve 15 on the upper header 4 and a connection port 14 for connecting to a pressure gauge
Also, a steam supply port 12 is formed. The other end of a pipe 17 having one end connected to an iron 18 for supplying steam is connected to the steam supply port 12.

A water supply port 13 for inflowing can water is formed in the lower header 5.

Therefore, the can water W that has flowed in from the water supply port 13 is stored inside the lower pipe header 5 and enters from the can water pipe 9 to the intermediate portion of the heating pipe 2. At this time, the heat generating portion of the electric heater 1 is inserted below the water position surface of the canned water inside the heating pipe 2.

Further, the canned water W also flows into the liquid column tube 6 provided in the vertical direction like the heating tube 1.

The liquid column pipe 6 is connected to the upper part of the heating pipe 2 at the upper part through an upper connecting pipe 10.

Further, the lower part of the liquid column pipe 6 and the lower pipe header 5 are connected to each other by the lower connecting pipe 11
Connected through.

Inside the liquid column tube 6, a water level detecting rod 16 for detecting the same water level surface as the water level surface of the can water W inside the heating tube 2 is provided.

The water level detection rod 16 is fixed to the upper part of the liquid column tube 6. On the other hand, the device 18 is provided with a steam supply port 17 on one side of a steam iron, for example.

In this electric boiler, the can water W flows from the water supply port 13 into the lower header 5, and when the water level reaches from the can water pipe 9 to the middle portion of the heating pipe 2, the water level detecting rod 16 of the liquid column pipe 6 One of them sends a signal to the controller 19 so that the electric heater 1 is energized.

Then, the electric heater 1 heats the can water inside the heating pipe 2 to generate steam, which passes through the steam pipe 7 and the upper header 4
The steam V is sent from the pipe 12 to the inside of the device 18 through the pipe 17 after being stored in the pipe 18.

[Problems to be Solved by the Invention] However, the heating pipe 2, the upper header 4, the lower header 5
Since they are connected by welding, they require skill and require a lot of work. There is also a problem that the sealed state cannot be maintained due to poor welding.

Further, in this electric boiler, rust is generated when each component is made of an iron material, but there is no problem as long as the device 18 can safely mix rust with steam.

When the steam consuming device 18 is an iron as shown in FIG. 12, there is a problem that rust is mixed with the steam and the clothes are discolored during the ironing work.

In the case of an electric boiler of iron material, rust is generated on the inner surface by the can water and steam, and the rust of iron is contained in the steam produced by the electric boiler.

Especially when a large amount of steam is used, the surface of the can water W in the electric boiler may become wavy, and the can water W may be discharged together with the steam.

Since the canned water W contains a large amount of rust, as a result, the rust of iron material is mixed in the steam. When the device 18 is an iron, when ironing a cloth with steam, there is a problem that when the steam containing rust hits the white cloth, the white cloth becomes reddish and has stains.

As described above, since the electric boiler is made of iron material, rust occurs. Therefore, if stainless steel pipes are used, rust does not occur, so steam does not contain rust and stains on white cloth etc. Must.

The electric boiler is a pressure vessel that contains steam, so when welding stainless steel and iron materials, the stainless steel and iron materials are easily carbonized by the heat of welding. The welding cost must be high because it must be welded by a welding technician, and because an inert gas such as argon welding is used, the unit price of the product is high.

Therefore, the object of the present invention is to improve the workability by eliminating the welded part in the electric boiler as much as possible and manufacturing the electric boiler by screwing.

Another object is to provide an electric boiler in which rust is prevented by combining each part with stainless steel, copper, copper alloy or the like.

[Means for Solving the Problem] An object of the present invention is to have an upper pipe connecting between the intermediate openings of the first tee and the second tee, and to connect to the upper opening of the first tee. A first flange, a heating pipe connected to a lower opening of an upper first tee, a first steam pipe connected to the first flange, and the first tee with one end fixed to the first flange. And an electric heater inserted into the inside of the heating pipe, a second flange connected to the upper opening of the second tee, a water level detection pipe connected to the lower opening of the second tee, and the second flange. A second steam pipe connected, a water level detection rod having one end fixed to the second flange and inserted inside the second tee and the water level detection pipe, the heating pipe and the water level detection pipe. To store Includes a pipe connected to the lower opening of the heating pipe and the water level detection pipe, the pipe, the outer pipe of the electric heater, and
An electric boiler characterized in that the water level detection rod is made of stainless steel and the connection of each of the above parts is screwed and fixed by screwing, and each of the above parts is selected from stainless steel, copper, copper alloy and screwed by screwing. An electric boiler characterized by being assembled together is obtained.

[Operation] The electric boiler is assembled by using only the pressure pipe member that is generally widely used as the pipe material of iron or stainless steel, and the electric boiler and the water supply system are connected. The connecting members are brass members and copper pipes. In this way, each component is screwed and connected by the screw portion.

[Embodiment] FIGS. 1 to 5 show an electric boiler according to an embodiment of the present invention.

The electric boiler of this embodiment will be described below with reference to the drawings.

The electric boiler has an electric heater 22 such as a sheathed heater whose outer tube is made of stainless steel, and a flange 21 to which one end of the electric heater 22 is fixed. On the flange 21,
One end of a steam discharge pipe 23 is connected as a first steam pipe for supplying steam to a pressure gauge and a pressure switch described later. The other end of the steam discharge pipe 23 is connected to the steam discharge elbow 24.
And a connection pipe 25 for discharging steam.

The flange 21 is connected to the first tee 26. That is,
The first tee 26 has upper and lower openings that are opened in the axial direction,
An intermediate opening opening in the direction perpendicular to the axial direction is formed, and a screw portion provided on the flange 21 is fixed to the upper opening by screwing. A heating pipe 27 is axially connected to the lower opening of the first tee 26.

Therefore, the first tee 26 and the heating pipe 27 are axially connected to each other. The first tee 26 and the heating pipe 27 have a screw portion formed on the heating pipe 27
It is fixed by being screwed into the lower opening of the tee 26. Upper pipe at the middle opening of the first tee 26
28 is connected. Threaded portions are formed at both ends of the upper pipe 28, and one ends of these threaded portions and an intermediate opening portion of the first tee 26 are screwed and fixed.

A screw portion is formed at the bottom of the heating pipe 27. An opening at one end of a pipe pulling elbow 29 is screwed and connected to a threaded portion at the bottom of the heating pipe 27. One end of a lower pipe 30 is connected to the opening of the other end of the pipe draw elbow 29. Threaded portions are formed at both ends of the lower pipe 30, and one of these threaded portions is fixed by being screwed into an opening portion at the other end of the tube draw elbow 29.

As described above, since the heating pipe 27 and the lower pipe 30 are bent and connected at a right angle by the pipe drawing elbow 29, the lower pipe 30 and the upper pipe 28 are provided in parallel.
Cap 31 and union on the threaded part of the other end of the lower pipe 30.
One end of a can water inflow pipe 33 is connected via 32.

On the other hand, this electric boiler has the second flange 34 and the second flange 34.
And a water level detection rod 35 attached to the flange 34 of the.

A steam supply pipe 36 is connected to the second flange 34 as a second steam pipe. The steam supply pipe 36 is connected to a steam discharge connection pipe 38 via a steam discharge elbow 37. The connection pipe 38 for supplying steam is connected to the supply port 17 of the iron 18 as shown in the conventional example of FIG.

The second flange 34 has a threaded portion which is the second
Connected to Tee 39. The second tee 39 has upper and lower openings in the axial direction, and has an intermediate opening at a right angle to the axial direction of the second tee 39 from an intermediate portion.

Therefore, the upper opening of the second tee 39 and the threaded portion of the second flange 34 are screwed together to be fixed. A water level detection pipe 40 is axially connected to the lower opening of the second tee 39. Threads are formed at both ends of the water level detection pipe 40.

That is, the screw part at the upper end of the water level detection pipe 40 is the second tee.
It is screwed and fixed to the lower opening of 39. The threaded portion at the lower end of the water level detection pipe 40 is connected to one end of the return pipe 43 via the cap 41 and the union 42.

In this electric boiler, the heating portion of the electric heater 22 is inserted inside the first tee 26 and the heating pipe 27. Inside the second tee 39 and the water level detection pipe 40,
A water level detection rod 35 made of stainless steel is inserted.

The other end of the canned water inflow pipe 33 is connected to a first connecting tee 45 via a union 44 as shown in FIGS. 3 and 4. The first connection tee 45 has two openings in the axial direction, and has an intermediate opening in the middle portion in the direction perpendicular to the axial direction.

Therefore, the screw portion formed on the union 44 is screwed and fixed to one end of the opening in the axial direction.

A second connection tee 47 is connected to the opening of the other end of the first connection tee 45 in the axial direction via a nipple 46. The second connecting tee 47 has two openings in the axial direction and an intermediate opening in the middle portion in the direction perpendicular to the axial direction.

Therefore, the first connecting tee 45 is screwed and fixed to one end of the opening in the axial direction through the nipple 46.

A water supply pipe 48 is connected to the intermediate opening of the second connection tee 47. Drain pipe at the other end opening of the second tee 47
A screw portion formed at one end of 49 is screwed and fixed. An on-off valve 56 is connected to the drain pipe 49.

The other end of the return pipe 43 is connected to the intermediate opening of the first tee 45 via the union 51. Connection pipe 25
The other end of is connected to one of the crosses 50. This cross
A safety valve 51, a pressure switch 52, and a pressure gauge 53 are connected to 50 via copper pipes 54 and 55.

Returning to FIG. 2, the return pipe 43 and the tip thereof are connected. When the first connecting tee 45 is arranged vertically downward, it contacts the lower pipe 30. Therefore, as shown in the figure, the axis of the lower pipe 30 is set to the angle θ with respect to the axis of the upper pipe 28.
Just shift.

This is performed during the screwing process of the heating pipe 27 and the pipe drawing elbow 29. According to fabrication, the angle θ is in the range of 5 degrees to 45 degrees. In this electric boiler, the first tee 26, the upper pipe 28, and the second tee 39 form an upper head.

The second tee 39 and the water level detection pipe 40 form a liquid column tube. The header elbow 29 and the lower pipe 30 constitute a lower header.

Next, the operation of the electric boiler will be described. When the valve 56 is closed, the water supplied from the pipe 48 is supplied to the first connection tee.
One of the two shunts from the 45 passes through the can water inflow pipe 33, and enters the lower pipe 30, the heading elbow 29, and the heating pipe 27.

On the other hand, the water level rises from the return pipe 43 to the water level detection pipe 40. The water level detection rod 35 consists of two long and short
When the water surface comes into contact with the shorter water level detection rod 35, a control device (not shown) operates to stop the water supply. At that time, the water level of the heating pipe 27 water level detection pipe 40 is at the same level. When the electric heater 22 is energized, the heating pipe
Can water boils in 27, the first tee 26, the upper pipe 28,
The control of the pressure in the second tee 39 filled with steam is
The operation of the pressure switch 52 activates the controller to keep the steam pressure constant.

The steam used for ironing is supplied from the steam supply pipe 36. The water level in the water level detecting pipe 40 is lowered by the boiling evaporation of the can water, and when the water level detecting rod 35 having a longer length is exposed above the water surface, the controller starts water supply. Therefore, the heat generating portion of the sheathed heater 22 is always located below the longer end of the water level detection rod 35.

Such an electric boiler, as shown in FIGS. 6 to 11, can be made into various combined shapes by adapting to the boiler installation space.

In each drawing, the same reference numerals are given to the portions described in FIGS. 1 to 5 and the description thereof will be omitted.

The electric boiler of Fig. 6 has a narrow installation space S1
Used for. In this electric boiler, a second lower pipe 60 and a connecting elbow 6 are provided between the cap 31 and the lower pipe 30.
2. The nipple 64 and the connecting elbow 66 are connected in series.

The electric boiler shown in FIG. 7 is used at a place S2 where the installation space is an equilateral triangle. In this electric boiler, a second lower pipe 68 and a connecting elbow are provided between the cap 31 and the lower pipe 30.
70 and are connected.

The electric boiler of FIG. 8 is used in a narrow space S3 where the installation space is a long triangle. In this electric boiler, the can water inflow pipe 33 shown in FIG. 1 is removed, and a third tee 45 is screwed into the cap 31 through a nipple (not shown) at an opening perpendicular to the axis with a screw portion of the nipple. The pipe 43 is screwed to one end of the axial opening of the third tee 45 through a union (not shown).

The electric boiler shown in FIG. 9 is used in a place S4 where the installation space is long horizontally. In this electric boiler, a connecting tee 71 is connected to the lower end of the heating pipe 27, a union 51 of a connecting member is screwed to the end of the connecting tee 71 via a plug 72, and the other end is a lower pipe. Connected to 30. The nipple connects the cap 31 and the tee 45.

The electric boiler shown in FIG. 10 is used for a vertically long place S5. In this electric boiler, a connection tee 73 is connected to the lower end of the heating pipe 27, and the connection tee 73
The plug 76 is screwed into the middle opening of the plug, and the screw is provided at the center of the plug 76.
Connect by screwing with the screw part of. Then, connect the connecting pipe 75 to the other opening of the connecting tee 73, screw the other end with the cap 77, the nipple 78 with a screw, and tee 47.
Connected to.

The electric boiler shown in FIG. 11 is used in the place S6 where the installation space is L-shaped. In this electric boiler, the upper pipe 28
Elbow 79, 80 connected to the center of the pipe and the middle of the lower pipe 30
Are connected respectively. In this way, the electric boiler can be assembled by changing its shape depending on the installation location.

[Effects of the Invention] As described in the above embodiments, the electric boiler of the present invention does not use welding, but is easily assembled because it is assembled by screwing only commercially available piping members, and the can body is not welded. Therefore, it can be made very cheap. Further, since the used member is made of stainless steel, brass, and copper, steam without generation of water rust can be supplied to the iron, and an effect can be obtained.

Further, since the pipe can be assembled by screwing, each component can be freely selected and connected, and an electric boiler of various shapes suitable for various installation spaces which cannot be installed by the conventional boiler can be easily provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the electric boiler of the present invention, FIG. 2 is a top view of FIG. 1, FIG. 3 is a bottom view of FIG. 1, and FIG. Side view,
FIG. 5 is an exploded view of FIG. 1, FIGS. 6 to 11 are perspective views showing a state where the assembled shape of the electric boiler is changed, and FIG. 12 is a perspective view of a conventional electric boiler. 1 ... Electric heater, 2 ... Heating tube, 4 ...
5 ... Lower pipe, 7 ... Steam pipe, 9 ... Can water pipe, 22 ...
… Electric heater, 24 …… Steam detection elbow, 26 …… First tee, 27 …… Heating pipe, 28 …… Upper pipe, 29 …… Heading elbow, 30 …… Lower pipe, 33 …… Canned water inflow Pipe, 34 …… Second flange, 36 …… Steam discharge pipe, 39
…… Second tee, 42 …… Union, 46 …… Nipple,
48 …… pipe, 60 …… second lower pipe, 66 …… connection elbow.

Claims (2)

[Scope of utility model registration request] 1. A first flange having an upper pipe connected between intermediate openings of a first tee and a second tee and connected to an upper opening of the first tee, the first tee. Of the heating pipe connected to the lower opening, the first steam pipe connected to the first flange, and one end fixed to the first flange and inserted into the inside of the first tee and the heating pipe. An electric heater, a second flange connected to the upper opening of the second tee, a water level detection pipe connected to the lower opening of the second tee, a second steam pipe connected to the second flange, the second The water level detection rod inserted into the second tee and the water level detection pipe with one end fixed to the flange of No. 2, the heating pipe, and the water level detection pipe so as to store can water. Above water level inspection Includes a pipe connected to the lower opening of the pipe, electric boiler, characterized in that the fixed connections between the mutually respective parts screwed by screwing. 2. The electric boiler according to claim 1, wherein each of the parts is selected from iron, stainless steel, silver and copper alloys and is assembled by screwing.