KR20090095259A - Heating apparatus for water boilor and method of making the heating apparatus - Google Patents

Abstract

A heating apparatus for a boiler with a reservoir and a manufacturing method thereof are provided to deliver heat to the whole of a case plate by a metal plate of aluminium material having superior heat transmission. A heating apparatus for a boiler with a reservoir comprises a case plate(140) of stainless material, a metal plate(150) of aluminium material, and an electric heater(160). The upper side of the metal plate of the aluminium material is fixed to the lower side of the case plate. The electric heater is fixed to the lower side of the metal plate. In the metal plate, a bimetal fastening protrusion(175) and a ground fastening protrusion(177) are installed.

Description

Heating apparatus for water type boiler and manufacturing method thereof {heating apparatus for water boilor and method of making the heating apparatus}

According to the present invention, since a case plate made of stainless steel, an aluminum plate made of aluminum, and an electric heater are sequentially placed, they are inserted into a brazing furnace and welded, thereby preventing rust and reducing weight, thereby making the body harmless and compact and lightweight. It relates to a heating device and a manufacturing method for a low-water boiler that can transfer heat quickly and quickly.

5 to 7, the conventional water-type boiler 40, the heating body (44, 44) consisting of a heating body 44 and a heating cover 41 for accommodating water, and the heating body 44 It consists of a water heater 46 is mounted on the bottom of the). It is preferable that the gasket 42 is installed between the heating body 44 and the heating cover 41 in terms of sealing.

The heating main body 44 is provided with a heater mounting hole 44a and a steam outlet 44b to which the heating device 46 is mounted. The water inlet (41a) is formed at the upper end of the heating cover (41). The heating device 46 is formed in a block shape of a hexahedron having a flange 46a formed at the edge thereof, and is mounted in the heater mounting hole 44a and fastened with a screw. The gasket 45 is disposed between the heating device 46 and the heating body 44. ) Is mounted.

The heating apparatus 46 is comprised from the U-shaped electric heater 46a and the die-casting aluminum body 46b which inserted this electric heater 46a.

The ground fastening projection piece 46c and the bottom plate fastening projection piece 46c in which female threads were formed are integrally formed in the lower surface of the body 46b. Further, the lower surface of the body 46a is formed with a bimetal fastening protrusion 46e for fastening the bimetal 48 described later. Between these bimetallic concave protrusion pieces 46e, the temperature measuring column 46f which hits a bimetal and measures a temperature is formed. This temperature measuring column 46a is slightly inward with respect to the bottom of the body 46b.

The lower part of the heating device 46 is equipped with a heat sink 47 to prevent other components from heating, and the bimetal 48 is fastened to the bimetal fastening piece 46e to automatically heat when the heating device 46 is overheated. Make sure the electricity is cut off.

In addition, the heating body 44 and the heating cover 41 is formed by protruding the flow preventing pieces (41b, 44c), even if the water-removing boiler 40 shakes during cleaning, the flow of water by the flow preventing pieces (41b, 44c) This is hindered, it is possible to minimize the movement of the water accommodated in the water boiler 40 to prevent the water outflow.

In addition, the upper portion of the heating body 44 is preferably to cover the middle cover member 43, the middle cover member 43 is to prevent the water contained in the heating body 44 to flow up and down. .

However, in the heating device 46 as described above, since the body 46b surrounds the electric heater 46a by die casting, heavy and expensive aluminum materials are consumed.

In addition, since the heating device 46 is exposed to a humid environment for a long time according to the use of the steam cleaner for a long time, the die-cast aluminum body 46b is corroded, thereby deteriorating durability.

In addition, the bimetal 48 is mounted on the bottom surface of the body 46b, and more specifically, because it protrudes in the z-axis direction with respect to the xy plane of the electric heater 46a, the bimetal 48 has a thick thickness T of the body 46b, which is a die casting product. The protruding height of 48 takes up a lot of space.

The present invention has been made to solve the above-described problems, to provide a heating device and a manufacturing method for low-water boilers that can transmit heat uniformly and quickly as well as to reduce the weight and harmless to the human body to prevent rust and reduce weight. The purpose is.

In order to achieve the above object, the heating device for a low-water boiler according to claim 1 of the present invention,

Stainless steel case plate; An aluminum metal plate having an upper surface fixed to the lower surface of the case plate; An electric heater is fixed to the lower surface of the metal plate.

According to this configuration, it is possible to prevent rust, harmless to the human body, reduce the weight, and reduce the weight, and transmit heat uniformly and quickly.

According to this configuration, since the part in contact with water is made of stainless steel, which does not corrode, it does not generate scale, is harmless to the human body, improves durability, and the heat is evenly transmitted to the entire case plate by the aluminum plate which is excellent in heat transfer. Can be.

Heating device for low water boiler according to claim 2 of the present invention,

The metal plate is characterized in that the bimetal fastening projection pieces and the ground fastening projection pieces are installed.

According to this configuration, it is convenient to fasten the bimetal to the ground.

Heating device for low water boiler according to claim 3 of the present invention,

The electric heater is characterized in that it is fixed in the form surrounding the bimetal fastening projection piece and the ground fastening projection piece.

According to this configuration, the electric heater is wound around the same length inlet type to reduce the overall size of the case plate, and the bimetal is arranged inside the electric heater to reduce the length and height, as well as the reduced height As much as you can increase the water storage of the bucket.

The manufacturing method of the heating apparatus for low boilers of Claim 4 of this invention,

Preparing an electric heater; Pressing the case plate made of stainless steel and the metal plate made of aluminum; And inserting the case plate, the metal plate and the electric heater into a brazing furnace to bond and fix the case plate.

According to this method, it is possible to produce a light and compact product by the press manufacturing process, and since it is charged into the brazing furnace, it is possible to remove moisture or impurities contained in the case plate, the metal plate, and the electric heater, thus eliminating a separate heat treatment process. can do.

The manufacturing method of the heating apparatus for low water boilers of Claim 5 of this invention,

After pressing the metal plate, it characterized in that it further comprises the step of mounting the bimetal fastening projection piece and the ground fastening projection piece to the metal plate.

The manufacturing method of the heating apparatus for low water boilers of Claim 6 of this invention,

Before charging into the brazing furnace, further comprising spraying aluminum powder between the case plate and the metal plate or between the metal plate and the electric heater.

According to this method, aluminum powder acts as a filler metal to provide excellent welding speed and welding strength, and also maintains the heat transfer rate from the metal plate to the case plate as it is aluminum powder.

As is apparent from the above description, according to the heating apparatus for low water type boiler and the manufacturing method of the present invention, the following effects are obtained.

Since the case plate, which is in contact with water, is made of stainless steel, which is not corroded, it does not form scale, is harmless to the human body, improves durability, and the aluminum plate which is excellent in heat transfer can transfer heat evenly to the entire case plate. .

In addition, by forming the case plate and the metal plate by the heating body by pressing, it is possible to manufacture a light and compact product.

Further, since the case plate, the metal plate, and the electric heater are closely welded in the brazing furnace, moisture or impurities in the case plate, the metal plate, and the electric heater are removed, so that a separate heat treatment process can be omitted.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a plan view showing a low-water boiler according to a preferred embodiment of the present invention, Figure 2 is a bottom perspective view of Figure 1, Figures 3 and 4 is a separate and combined perspective view showing a heating device for a water-type boiler. .

As shown in Figure 1 and Figure 2, the low-water boiler 100 according to the present embodiment is composed of a bucket 110 and the heating device 130 to form a large appearance.

Bucket 110 is composed of a heating body 111 and the heating cover 116. The heating body 111 and the heating cover 116 is screwed to the fastening hole and the fastening groove formed in each rim with a screw.

The heating body 111 is provided with a heater mounting hole (not shown) in which the steam discharge pipe 112 and the heating device 130 are mounted.

The water inlet 117 is formed in the heating cover 116.

Heating device 130 is largely composed of a case plate 140 and the electric heater (160). In addition, it is preferable that the metal plate 150 is installed between the case plate 140 and the electric heater 160 in the heater device 130.

As shown in FIG. 3, the case plate 140 has a box shape composed of a base plate 141 and a side plate 143 surrounding the edge of the base plate 141.

In addition, the circumference of the side plate 143 is formed with a fastening flange 145 fastened to the heating body 111.

The fastening flange 145 has a fastening hole 146 fastened by screws.

When the case plate 140 is mounted in a heater mounting hole (not shown) as shown in FIG. 2 and is fastened, the case plate 140 is immersed in water in the bucket 110 to boil water.

Thus, if the case plate 140 is made of stainless steel, it has the advantage of preventing corrosion due to scale to improve durability and harmless to human body because there is no toxicity.

The electric heater 160 is an inlet (□) type electric heater 160 disposed around the base plate 141 of the case plate 140 in this embodiment.

In particular, the inlet type electric heater 160 is an inlet type in which terminals 161 and 163 overlap each other (close to the initial form wound in a spiral type).

Therefore, heat can be evenly transmitted to the entire base plate 141 of the case plate 140. Of course, the electric heater 160 of the present embodiment may be U-shaped, C-shaped.

At this time, when the case plate 140 is made of stainless steel, it is interposed between the lower surface of the case plate 140 and the electric heater 160 is a metal plate 150 of a material such as aluminum or copper having excellent heat transfer rate. desirable.

Therefore, the metal plate 150 receives heat from the electric heater 160 and thus uniformly and rapidly conducts the entire base plate 141 to increase steam generation efficiency.

In addition, when the lengths from the terminals 161 to the terminals 163 of the electric heater 160 are the same, the length of the case plate 140 may be reduced because the winding type is disposed in the inlet according to the present embodiment, which contributes to the weight reduction and further miniaturization. Can be.

The metal plate 150 is preferably equal to or slightly smaller than the surface area of the base plate 141.

In addition, it is preferable that the bimetal fastening protrusion piece 175 fastened to the fastening bracket 172 of the bimetal 170 as shown in FIGS. 3 and 4 is installed on the metal plate 150.

It is preferable that the bimetal fastening protrusion piece 175 is a female thread formed in the inner surface of a cylindrical shape.

In particular, the bimetal fastening piece 175 is installed inside the inlet-type electric heater 160, that is, the electric heater 160 has a form surrounding the bimetal fastening piece 175 and the bimetal 170, Since the height h is also at a position substantially equal to or slightly higher than the height H of the electric heater 160, even if the bimetal 170 is fastened and fixed to the bimetal fastening protrusion 175, the base plate 141 The height to the terminals 171 and 173 of the bimetal 170 is significantly low, so that the height of the bucket 110 can be increased by that much.

Therefore, the usage time can be lengthened by increasing the amount of water that can be contained in the bucket.

In addition, the metal plate 150 is preferably provided with a ground fastening protrusion piece 177.

It is preferable that the ground fastening projection piece 177 also has a female screw formed on the inner surface of the cylindrical shape similarly to the bimetal fastening projection piece 175.

It is preferable that the ground fastening projection piece 177 is higher than the bimetal fastening projection piece 175.

In addition, the metal plate 150 is preferably provided with a bottom plate fastener piece 179 that is fastened and fixed to the bottom plate (not shown) of the steam cleaner or steam iron.

It is preferable that the bottom plate fastening projection piece 179 also has a female screw formed on the inner surface of the cylindrical shape, and has a larger inner diameter and a somewhat higher shape than the ground fastening projection piece 177, so that the grounding or bimetal 170 has a bottom plate ( (Not shown).

As such, the bimetal fastening piece 175, the ground fastening piece 177, and the bottom plate fastening piece 179 are disposed inside the electric heater 160, so that the overall height can be lowered.

After fastening the bimetal 170 to the bimetal fastening piece 175 to the heating device 130 as described above, the heat sink 180 is passed through the fastening flange 145 using a screw and then fixed to the heating body 111 by fastening. do.

Hereinafter, the manufacturing method of the above-mentioned structure is demonstrated.

First, the case plate 140 is molded by a press. At this time, it is preferable that the fastening flange 145 and the fastening hole 146 are also molded together by a press.

In addition, the metal plate 150 is also molded by a press. At this time, the metal plate 150 is preferably molded together with a hook mounting hole (not shown) in which the bimetal fastening piece 175, the ground fastening piece 177, or the bottom plate fastening piece 179 are caught.

The case plate 140 is preferably a stainless steel material that is harmless to a human body and prevents rust, and the metal plate 150 is preferably an aluminum material that uniformly and quickly transfers heat of the electric heater 160 to the case plate 140.

In addition, the electric heater 160 is prepared by bending the inlet shape.

The metal plate 150 is placed on the bottom surface of the case plate 140 and the electric heater 160 is placed thereon. At this time, the bimetal fastening protrusion piece 175, the ground fastening protrusion piece 177, and the bottom plate fastening protrusion piece 179 are inserted into the mounting holes, and then temporarily bonded or just placed in the case plate 140. You can put it on the bottom.

In this state, the case plate 140, the metal plate 150, and the electric heater 160 may be temporarily bonded, and then charged into a brazing furnace, or the case plate 140 and the metal plate may not be temporarily bonded. 150), the electric heater 160 may be placed in the order and charged into the brazing furnace.

Charging into the brazing furnace after provisional bonding has the advantage that the position is not shaken and can be correctly placed in place, but a temporary bonding process is required.

Since it is heat-bonded in the brazing furnace, moisture or impurities in the case plate 140, the metal plate 150, and the electric heater 160 may be removed, so that a separate heat treatment process may not be performed as compared with local welding.

Before charging into the brazing furnace, it is preferable to spray aluminum powder between the case plate 140 and the metal plate 150 as the base material and the metal plate 150 and the electric heater 160 as the base material.

Aluminum powder acts as a filler metal in the brazing furnace to not only improve the welding efficiency and welding strength between the base metals, but also excellent thermal conductivity due to the aluminum material to maintain the thermal conductivity of the existing metal plate 150 as it is.

The brazing process may be the case plate 140 and the metal plate 150 first, and then the metal plate 150 and the electric heater 160 later.

As such, since the case plate 140 and the metal plate 150 are formed by press working, the case plate 140 and the metal plate 150 are lighter and have a lower height than the die-casting casting, thereby enabling miniaturization.

In particular, a part for fastening other parts is disposed in the inner space of the electric heater 160, so that the height of the heating device 130 can be lowered, thereby increasing the height of the entire bucket 110 to contain a large amount of water. have.

In addition, since the case plate 140 made of stainless steel transfers heat to water, there is no fear of corrosion due to scale, thereby improving durability, and having no toxicity.

The heater and the manufacturing method for a water-type boiler according to the present invention can be carried out in various modifications within the range allowed by the technical idea of the present invention without being limited to the above-described embodiment.

The present invention can be applied to a heating device for a low water boiler such as a steam cleaner and a steam iron.

1 is a plan view showing a low boiler according to a preferred embodiment of the present invention.

FIG. 2 is a bottom perspective view of FIG. 1. FIG.

3 and 4 is a perspective view of the separation and coupling showing the heating device for a water-type boiler.

5 and 6 is a front and rear perspective view showing the separation of the conventional low-water boiler.

FIG. 7 is an enlarged perspective view of the heating apparatus for the water type boiler of FIG. 6.

<Explanation of symbols for the main parts of the drawings>

100: water boiler 110: bucket

111: heating body 112: steam discharge pipe

116: heating cover 117: water inlet

130: heating device 140: case plate

141: base plate 143: side plate

145: fastening flange 146: fastening hole

150: metal plate 160: electric heater

161,163: Electric heater terminal 170: Bimetal

171,173: bimetallic terminal 172: bimetallic fastening bracket

175: bimetal fastening projections 177: ground fastening projections

179: Floor plate fastening projections

Claims (6)

Stainless steel case plate; An aluminum metal plate having an upper surface fixed to the lower surface of the case plate; Heating device for low water boiler, characterized in that consisting of an electric heater fixed to the lower surface of the metal plate. The method of claim 1, The metal plate is a heating device for low water boiler, characterized in that the bimetal fastening piece and the ground fastening piece is installed. The method of claim 2, The electric heater is a heating device for a low-water boiler, characterized in that fixed in the form surrounding the bimetal fastening projection piece and the ground fastening projection piece. Preparing an electric heater; Pressing the case plate made of stainless steel and the metal plate made of aluminum; And inserting the case plate, the metal plate, and the electric heater into a brazing furnace to bond and fix the heating plate. The method of claim 4, wherein And after the pressing of the metal plate, mounting the bimetal fastening piece and the ground fastening piece to the metal plate. The method according to claim 4 or 5, And before spraying the brazing furnace, spraying aluminum powder between the case plate and the metal plate or between the metal plate and the electric heater.

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