JP3201602B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater having high heat exchange efficiency using heat of combustion of various combustibles as a heat source.

[0002]

2. Description of the Related Art As a water heater for heating cold water to extract hot water, a water heater for heating cold water in a tank by the heat of combustion of a solid fuel such as wood is conventionally known. This type of water heater usually has a water tank in which a cold water inflow pipe is provided at a lower portion and a hot water outflow pipe is provided at an upper portion, and a combustion chamber which heats a lower portion of the water tank with combustion heat of solid fuel. It has.

[0003]

Incidentally, the above-mentioned conventionally known water heater has a structure in which the lower part of the water tank is simply heated by the combustion heat of the solid fuel generated in the combustion chamber, so that the heat exchange efficiency is low. However, there are problems that it takes a long time to make cold water warm, and that it requires a lot of solid fuel.

Accordingly, an object of the present invention is to provide a water heater having high heat exchange efficiency using heat of combustion of various combustibles as a heat source.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a water heater according to the present invention comprises a water tank having a cold water inflow pipe provided at a lower portion and a hot water outflow pipe provided at an upper portion,
A combustion chamber that heats the lower part of the water tank with the combustion heat of the combustible material, a flue gas tube that penetrates vertically through the water tank and communicates with the combustion chamber, and is attached to a lower surface of the water tank that faces the combustion chamber. The combustion chamber is formed in a substantially rectangular box shape surrounding the lower part of the water tank, and an input port for charging a combustible material is provided on an upper surface, and the side wall is provided with a combustible material. An opening / closing door for opening / closing a crater for ignition is attached, and both ends open into the water tank through the smoke stack.
A heating pipe is attached to the smoke stack, and the heat exchange pipe has an outer pipe having a size capable of facing the lower surface of the water tank and an outer pipe having an end disposed inside the outer pipe and having an end. , An inner pipe communicating with the outer pipe, an end communicating with the lower part in the water tank, and a drain pipe having a drain cock.

[0006] In the water heater of the present invention, the combustion chamber heats the lower part of the water tank in a use state in which the combustible material burns in the combustion chamber to generate combustion heat, and the high-temperature combustion gas passes through the smoke stack. In addition, the smoke stack heats the water in the water tank up and down, and the heat exchange pipe heats the lower part of the water tank while circulating the cold water.

In the water heater according to the present invention, if a heating pipe penetrating the smoke stack and having both ends opened into the water tank is attached to the smoke stack, the heating pipe heats water entering the heating pipe. The heat exchange efficiency is further increased,
In addition, convection of water in the water tank is promoted, which is preferable.

Further, it is preferable that the combustion chamber is constituted as a combustion chamber for burning combustibles in a manner similar to dry distillation, since higher combustion heat can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A water heater according to an embodiment of the present invention will be described below with reference to the drawings. In the drawings to be referred to, FIG. 1 is a perspective view showing an appearance of a water heater according to one embodiment, FIG. 2 is a longitudinal sectional view showing an internal structure of the water heater according to one embodiment, and FIG. 3 is hot water according to one embodiment. It is a perspective view showing a heat exchange pipeline of a vessel.

As shown in FIGS. 1 and 2, a water tank according to one embodiment has a water tank 3 having a cold water inflow pipe 1 provided at a lower portion thereof and a hot water outflow pipe 2 provided at an upper portion thereof. Combustion chamber 4 for heating the lower part of water tank 3 with the combustion heat of combustibles
And a flue gas pipe 5 penetrating vertically through the water tank 3 and communicating with the combustion chamber 4, and heat attached to the lower surface of the water tank 3 facing the combustion chamber 4 and communicating with the lower part of the water tank 3. Exchange line 6
And

The inflow pipe 1 is mounted so as to penetrate a lower portion of the peripheral wall 3A of the water tank 3. Tap water or the like is supplied to the inflow pipe 1 via a hose (not shown) or the like. The outflow pipe 2 is mounted so as to penetrate the top plate 3B of the water tank 3. A pressure valve 7 for adjusting the pressure of hot water is provided in the middle of the outflow pipe 2.

The water tank 3 is a sealed container in which the upper end of a cylindrical peripheral wall 3A is closed by a stainless steel plate top plate 3B and the lower end is closed by a stainless steel plate bottom plate 3C. The peripheral wall 3A has a heat insulating structure in which a heat insulating material 3A3 is sandwiched between an inner wall 3A1 and an outer wall 3A2 made of a stainless steel plate. And bottom plate 3C
The heat exchange pipe 6 is attached to the lower surface of the

The combustion chamber 4 has a substantially rectangular box shape surrounding the lower part of the water tank 3, and its upper part is covered with a stainless steel plate top plate 4A. The side wall 4B of the combustion chamber 4 includes an inner wall 4B1 made of an iron plate and an intermediate wall 4B2.
And a heat-insulating material 4B3 sandwiched between the outer wall 4B2 and a heat insulating material 4B5 sandwiched between an intermediate wall 4B2 made of an iron plate and an outer wall 4B4 made of a stainless steel plate. The bottom 4C of the combustion chamber 4 has a heat-resistant structure in which a heat-resistant material 4C3 is sandwiched between an inner bottom 4C1 made of an iron plate and an outer bottom 4C2 made of a stainless steel plate. The inner bottom 4C1 is
The water tank 3 is gently downwardly inclined downward. The combustion chamber 4 is supported at a predetermined height by support legs 4D arranged at four corners of the bottom 4C. The inner wall 4B1 and the intermediate wall 4B2 made of an iron plate and the inner bottom 4C made of an iron plate are also provided.
1 can be omitted as appropriate.

The top plate 4A of the combustion chamber 4 is provided with an opening / closing lid 4F having a charging port 4E for charging the combustible material F. Further, an opening / closing door 4G for opening and closing a crater for igniting the combustible F is provided on one side wall 4B on the long side of the combustion chamber 4. And the bottom 4 of the combustion chamber 4
On the lower surface of C, a drawer-type tray 4H for discharging combustion residues of combustibles F in the combustion chamber 4 is attached.
When the open / close lid 4F and the open / close door 4G are closed, the combustion chamber 4 is configured as a combustion chamber that burns combustibles F like dry distillation combustion. In the above description, the combustible material F is supplied from the input port 4E, and the large combustible material F is supplied by opening the opening / closing lid 4F.

The smoke exhaust tube 5 is formed of a stainless steel plate into a rectangular tube having a side of about 150 to 120 mm. The smoke stack 5 is provided with heating pipes 5A, 5B, 5C that penetrate the smoke stack 5 and open at both ends into the water tank 3. The heating pipe 5A located at the lower part and the heating pipe 5C located at the upper part in the water tank 3 are inclined in the same direction at a gradient of about 30 degrees, and the heating pipe 5B located in the middle part is inclined in the opposite direction by 30 degrees. It is inclined at a gradient of about degrees. In one embodiment, these heating pipes 5A, 5B, and 5C are configured by square pipes each having a side of about 40 mm.

As shown in FIG. 3, the heat exchange pipe 6 has an outer pipe 6A having a substantially square shape capable of facing the bottom plate 3C of the water tank 3, and an inner pipe 6A inside the outer pipe 6A. It is arranged in three rows in parallel, and both ends are each an outer conduit 6.
A and an inner conduit 6B connected to A. A communication pipe 6C communicating with a lower part in the water tank 3 and a drain pipe 6E having a drain cock 6D are connected to a central portion of one side of the outer pipe 6A communicating with each of the inner pipes 6B. ing. The drain pipe 6E has an L-shape that protrudes outside the outer peripheral pipe 6A and is bent downward, and the communication pipe 6C protrudes upward from the middle of the drain pipe 6E and is bent inside the outer peripheral pipe 6A. It has an L-shape.

In the heat exchange line 6, the drain line 6E penetrates one side wall 4B on the short side of the combustion chamber 4, and the end of the communication line 6C penetrates the peripheral wall 3A of the water tank 3. By doing so, it is supported by the side wall 4B and the peripheral wall 3A and is attached to the lower surface of the bottom plate 3C of the water tank 3.

When using the water heater of one embodiment configured as described above, first, tap water or the like is supplied to the inflow pipe 1 to fill the water tank 3 with water. Also, the combustion chamber 4
The openable cover 4F on the upper surface is opened, and the combustible material F is charged into the combustion chamber 4. Then, the door 4G attached to the side wall 4B of the combustion chamber 4 is opened to ignite the combustible F. After the flammable material F is ignited, the openable cover 4F and the open / close door 4G are closed, and air is supplied from the upper inlet 4E to burn the combustible material F like dry distillation combustion. In addition, as the combustible material F, besides wood chips, wood chips, rice husks, etc., household trash with a lot of paper waste and office trash with a lot of shredder paper chips can be used.

Along with combustion such as dry distillation combustion of combustibles F,
High-temperature (300 ° C. to 500 ° C.) combustion heat is generated in the combustion chamber 4, and high-temperature combustion gas passes through the smoke stack 5. Accordingly, the combustion chamber 4 heats the bottom plate 3C below the water tank 3, and at the same time, the smoke stack 5 heats the water in the water tank 3 up and down. At this time, a part of the water in the water tank 3 is supplied to each of the heating pipes 5 </ b> A, 5 </ b> A attached to the smoke stack 5.
B, 5C, and are heated, and each heating pipe 5A, 5C is heated.
B, 5C while ascending upward while meandering.

On the other hand, in the heat exchange pipe 6, the lower cold water in the water tank 3 is introduced from the communication pipe 6 C into the outer peripheral pipe 6 A and each of the inner pipes 6 B. Heated. Then, the heated hot water in the outer peripheral pipe 6A and in each of the inner pipes 6B circulates in the water tank 3 through the upper part in the communication pipe 6C.

That is, in the water heater of one embodiment, the combustion chamber 4 is formed by combustion such as dry distillation combustion of the combustible material F.
High-temperature combustion heat is generated in the combustion chamber 4.
Heats the bottom plate 3C at the lower part of the water tank 3 and the smoke exhaust tube 5 heats the water in the water tank 3 up and down. In addition, each heating pipe 5A attached to the smoke stack 5
5B and 5C heat a part of the water in the water tank 3. In addition to this, the heat exchange pipe line 6 heats the cold water in the lower portion of the water tank 3 while circulating the cold water sequentially. Therefore, the water heater of one embodiment has extremely high heat exchange efficiency, and can efficiently heat water in the water tank 3 in a short time.

Each of the heating pipes 5A, 5A of the smoke stack 5
B, the water in the water tank 3 which has entered the 5C and is heated,
Since it rises while meandering upward along each of the heating pipes 5A, 5B, and 5C, convection of water in the water tank 3 is promoted, and the temperature of the hot water in the water tank 3 can be made uniform.

The flue gas cylinder 5 and each heating pipe 5
A, 5B and 5C may be cylindrical. Further, each of the heating pipes 5A, 5B, and 5C may be configured to penetrate the smoke stack 5 substantially horizontally.

[0024]

As described above, according to the water heater according to the present invention, the combustible material is burned in the combustion chamber to generate heat of combustion, and in a use state in which high-temperature combustion gas passes through the smoke stack, In addition to the combustion chamber heating the lower part of the water tank, the smoke stack heats the water in the water tank up and down, and the heat exchange pipe heats while circulating the cold water in the lower part of the water tank, The heat exchange efficiency is high, and the water in the water tank can be efficiently warmed in a short time. In addition, as long as the combustibles as fuel can be burned in the combustion chamber, wood chips, paper chips, dust and the like can be used, so that the fuel cost can be reduced.

In the water heater according to the present invention, when a heating pipe which penetrates the smoke stack and has both ends opened into the water tank is attached to the smoke stack, the water entering the heating pipe is supplied by the heating pipe. Since the heating is performed, the heat exchange efficiency can be further increased. Further, since the convection of the water in the water tank is promoted by passing the heated water through the heating pipe, the temperature of the hot water in the water tank can be made uniform.

When the combustion chamber is configured as a combustion chamber for burning combustibles like carbonization combustion, higher-temperature combustion heat is obtained by carbonization combustion of combustibles. Cold water can be heated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a water heater according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the internal structure of the water heater according to one embodiment.

FIG. 3 is a perspective view showing a heat exchange pipeline of the water heater according to the embodiment.

[Explanation of symbols]

 1: Inflow pipe 2: Outflow pipe 3: Water tank 3A: Peripheral wall 3B: Top plate 3C: Bottom plate 4: Combustion chamber 4A: Top plate 4B: Side wall 4C: Bottom 4D: Support leg 4E: Inlet 4F: Opening / closing lid 4G : Opening / closing door 4H: Tray 5: Smoke stack 5A, 5B, 5C: Heating pipe 6: Heat exchange pipe 6A: Outer pipe 6B: Inner pipe 6C: Communication pipe 6D: Drain cock 6E: Drain pipe 7: Pressure valve F: Combustible material

Claims (2)

(57) [Claims] 1. A water tank in which a cold water inflow pipe is provided at a lower part and a hot water outflow pipe is provided at an upper part, a combustion chamber for heating a lower part of the water tank by combustion heat of a combustible material, and the water tank. A flue gas tube penetrating vertically through the inside and communicating with the combustion chamber, and a heat exchange pipe attached to the lower surface of the water tank facing the combustion chamber, wherein the combustion chamber surrounds a lower part of the water tank. is formed in substantially rectangular parallelepiped box shape, the upper surface is attached is inlet to inject combustible materials, the side walls are attached is closing door for opening and closing the vent for igniting the combustible material, the flue gas
Heating pipe that penetrates the tube and opens at both ends into the water tank
Is attached to the flue gas stack, and the heat exchange pipeline has an outer peripheral pipeline of a size capable of facing the lower surface of the water tank, and an end disposed inside the outer peripheral pipeline and communicating with the outer peripheral pipeline. A water heater comprising: an inner pipe, a communication pipe having an end communicating with an outer pipe and a lower end in a water tank, and a drain pipe having a drain cock. 2. The water heater according to claim 1, wherein
The combustion chamber burns combustibles like dry distillation combustion.
A water heater characterized by being configured as: