JPH0345295B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an indoor water heater equipped with a hot air heating function.

[Conventional technology]

BACKGROUND ART Conventionally, in a water heater equipped with a heating function, a heat exchange coil dedicated to hot water supply or heating is embedded in a can of a hot water boiler main body as a hot water heater.

Some hot water boiler bodies include a 1-burner, 1-can, 2-channel type, and a 2-burner, 2-can, 2-channel type.

Such a hot water boiler body alone does not have the ability to function as a heating machine, and only a system that connects a radiator, such as a panel radiator or a convector installed indoors, can function as a heating machine.

[Problem that the invention seeks to solve]

However, adding a heating function to such a water heater requires a large-scale hot water supply and heating system including a radiator and the like, which may impair the basic performance of the water heater. In other words, the water heater has
This heating system has an extremely high initial cost because it includes additional functions such as a blower and heat exchanger.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a water heater having a heating function capable of not only supplying hot water but also providing hot air heating.

[Means for Solving the Problems] According to the present invention, a combustion chamber, a heat exchanger provided above the combustion chamber and serving as a passage for water, and a burner section for burning fuel in the combustion chamber are provided. A water heater comprising: a cooling passage surrounding the combustion chamber and the heat exchanger; an air introduction pipe connecting a blower box of the burner section to the cooling passage; and an exhaust collecting pipe connecting the cooling passage. a warm air window formed in a part of a cooling air outer box that defines the outside of the cooling passage; and hot air volume control means for controlling the flow of hot air in the cooling passage. There is obtained a water heater having a hot air heating function, characterized in that heat is exchanged directly between the combustion heat from the combustion chamber and the air in the cooling passage.

〔Example〕

1 to 3 show a water heater having a hot air heating function, which is an embodiment of the present invention.

The illustrated water heater has a boiler main body 1 . Inside the boiler body 1, a cooling air outer box 3 and a burner section 5 are provided. A combustion cylinder 7 having a bottomed shape is provided inside the cooling air outer box 3. The combustion tube 7 is made of a heat-resistant material and a metal plate. A heat exchanger 9 is provided in the upper opening of the combustion cylinder 7. An exhaust collecting pipe 12 is provided between the upper part of the heat exchanger 9 and the top plate 10 of the cooling air outer box 3. A cooling air flow return port 14 is formed on the side circumferential surface of the exhaust manifold 12 . The boiler body 1 is mounted on the top plate 10 of the cooling air outer box 3.
Exhaust connection port 15 passing through the top surface and extending to the outside
is provided.

A cooling passage 18 is formed between the combustion tube 7, the heat exchanger 9, the exhaust collecting tube 12, and the cooling air box 3. Cooling control dampers 20 and 21 are provided near the top of the combustion tube 7 and in the cooling passage 18.

The heat exchanger 9 also includes a water supply pipe 23 and a hot water supply pipe 2.
4 is the cooling passage 18 from the outside of the cooling outer box 3.
It is connected through the inside of the

On the other hand, the burner section 5 includes a ventilation box 28 and a ventilation device 30 arranged on the top surface of the ventilation box 28 for introducing air. A draft tube 35 extending to the combustion chamber 32 inside the combustion tube 7 is connected to the ventilation box 28 . A cooling passage 1 is provided at the bottom of the ventilation box 28.
An air introduction tube 37 extending into the inside of the tube 8 is connected.

Furthermore, a warm air window 40 is provided at the bottom of the cooling outer box 3.
is formed. The warm air window 40 is connected to the air introduction tube 3
7 (that is, on the side opposite to the air introduction cylinder 37) at the lower part of the cooling outer box 3. The hot air window 40 is provided with a hot air damper 42 whose angle is variable. Boiler body 1 facing hot air window 40
A hot air outlet 45 is formed in the side wall of the housing.
This hot air outlet 45 is provided with a louver 47 that can be opened and closed. In the space between the hot air damper 42 and the louver 47, there is a hot air guide plate 5 for guiding the hot air blown from the hot air damper 42 to the hot air outlet 45.
0 is set.

Now, when the blower device 30 is operated, combustion air is sucked into the blower box 28, is divided into the draft tube 35 of the burner section 5 and the air introduction tube 37, and is forced into the combustion chamber 32 and the cooling passage. 1
Sent to 8.

The air flow in the draft tube 35 serves to generate a combustion flame in the burner section 5. The combustion flame of the burner section 5 is
It is formed in the combustion chamber 32 in front of the draft tube 35. The combustion gas passes through the heat exchanger 9 and is discharged to the outside of the boiler body 1 from the exhaust manifold 12 and the exhaust connection port 15.

On the other hand, the air flow separated from the air introduction tube 37 is
Cooling air flow return port 1 via cooling passage 18
4 and the warm air window 40.

During hot water supply operation, the burner section 5 starts combustion,
Hot water is supplied from the hot water supply pipe 24. At this time, the hot air damper 42 fully closes the hot air window 40, and the cooling control dampers 20 and 21 are in an open state. Therefore, the air entering the cooling passage 18 from the air introduction tube 37 directly exchanges heat with the combustion heat from the combustion chamber 32, cools the combustion tube 7, and at the same time heats the air itself. It passes through the outer peripheral part of the heat exchanger 9 and joins the exhaust gas collecting pipe 12 .

That is, at this time, the heated air passes through the heat exchanger 9 at a temperature exceeding about 200° C. at the upper part of the combustion tube 7, contributing to an improvement in heat exchange efficiency.

By the way, when the room temperature or the ambient temperature of the boiler body 1 is low, that is, during the winter season, the hot air damper 42 is manually opened and the cooling control damper 2 is turned on, for example, at the same time as hot water supply operation.
0 and 21 are kept closed or close to closed. In this way, the air (approximately 100 to 150°C) that has been appropriately warmed inside the cooling passage 18 is passed through the hot air window 40.
The hot air is then discharged under pressure through the louver 47 and sent down below the boiler main body 1 as hot air.

Further, the opening and closing of the cooling control dampers 20, 21 and the hot air damper 42 can also be performed by electrical control means as shown in FIG. That is, the temperature information signal detected by the thermistor 51 at a low temperature is processed by the control circuit 52 to control opening and closing of the hot air damper 42 and the cooling control damper 20. According to this, since the thermistor 51 is provided, operation by automatic hot air heating is possible. This control circuit 5
2, it is also possible to control the driving of the electromagnetic pump 53 that supplies fuel.

In this case, since the amount of air is divided in advance for hot water supply and hot air, even if hot air heating is performed, there is no effect on the hot water supply efficiency.

Further, the positions of the hot air window 40, the hot air damper 42, and the louver 47 can be set arbitrarily, but due to the air temperature inside the cooling passage 18, It is desirable that

A water heater equipped with this kind of hot air heating function,
For example, it is installed in a changing room. When you supply hot water to a bath or bathtub, by the time the bathtub is full,
The inside of the changing room is heated by hot air to the appropriate temperature, so you can change clothes without worrying about the cold even on cold winter days.

Furthermore, since this warm air is dry air that does not contain any water vapor, it can also be used as a simple dryer.

〔Effect of the invention〕

As explained above, according to the hot water heater having the hot air heating function of the present invention, a part of the amount of air blown to the burner is supplied to the outer periphery of the combustion chamber and used as cooling air. Since the water is extracted and used for hot air heating, a water heater with hot air heating function can be obtained without adding a new blower or heat exchanger for heating.

In addition, without compromising the basic performance of conventional small rapid heating water heaters and without changing the installation space, hot air heating can be performed at the same time as hot water supply. Furthermore, since there are no special functional parts, there are economic advantages and reliability as a utility product is improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of a water heater having a hot air heating function according to the present invention, and FIG. 2 shows another embodiment of a water heater having a hot air heating function according to the present invention. 3 is a perspective view showing the external appearance of the water heater having the hot air heating function shown in FIG. 2, and FIG. It is an operation circuit diagram. 1; Boiler main body, 3; Cooling outer box, 5; Burner section, 7; Combustion tube, 9; Heat exchanger, 12; Exhaust collecting tube, 14; Cooling air flow return port, 15; Exhaust connection port, 18; Cooling passage, 20, 21; Cooling control damper, 28; Air blower box, 30; Air blower,
32; Combustion chamber, 35; Draft tube, 37;
Air introduction tube, 40; Hot air window, 42; Hot air damper,
45; hot air outlet, 47; louver, 51; thermistor.

Claims (1)

[Scope of Claims] 1. A water heater that includes a combustion chamber, a heat exchanger that serves as a water passage provided above the combustion chamber, and a burner section that burns fuel in the combustion chamber. a cooling passage surrounding the chamber and the heat exchanger; an air introduction pipe connecting the blower box of the burner section to the cooling passage; an opening for communicating the cooling passage to the exhaust collecting pipe; A hot air window formed in a part of a cooling air outer box that defines the outside of the cooling passage, and a hot air volume control means that controls the flow of hot air in the cooling passage, and the combustion heat from the combustion chamber and the hot air volume control means are provided. A water heater having a hot air heating function, characterized in that heat is exchanged directly with the air in the cooling passage. 2. A patent claim in which the hot air volume control means includes a hot air damper that can turn on and off the flow of hot air to the hot air window, and a cooling control damper provided at a position downstream of the hot air window in the cooling passage. A water heater having a hot air heating function according to item 1. 3. The water heater having a hot air heating function according to claim 1, wherein the hot air volume control means has a variable angle louver provided in the hot air window. 4. The water heater having a hot air heating function according to claim 2, wherein the hot air damper and the cooling control damper are interlocked with each other.