JPH0129454Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a heating device that performs hot air heating and hot water heating by combustion in a combustion burner.

<Prior art> In the past, for example, the actual application related to the applicant's application
No. 58-164218, a main heat exchanger for hot air heating is connected to a combustion chamber containing a combustion burner, and a convection fan is provided behind the main heat exchanger to blow out hot air.
Furthermore, a hot water heat exchanger is installed inside the combustion chamber, and a storage tank, a circulation pump, and a radiator are sequentially connected to the hot water heat exchanger to form a circulation circuit, thereby achieving good hot air heating and hot water heating. Heating devices are known.

<Problems to be solved by the invention> With this conventional heating device, it is not possible to easily stop hot water heating and only perform hot air heating.

The reason for this is that even if the circulation pump is stopped and heat is no longer radiated from the radiator, hot water is still retained in the hot air heat exchanger, and the hot water in the hot water heat exchanger is not heated by the combustion burner. This is because the hot water will continue to be overheated, and the hot water will eventually boil and vaporize, flowing back into the storage tank and producing a loud blowing sound.

Therefore, it is very time-consuming to drain the water in the hot water heat exchanger every time you operate hot air alone, and to add water every time you use floor heating.In the end, hot air heating alone is not easy. Since it is not possible to do so, hot air heating and hot water heating will always be used in combination.

<Means for solving the problem> A main heat exchanger is connected to a combustion chamber containing a combustion burner, and a convection fan is provided behind the main heat exchanger to blow out hot air, while a hot water heat exchanger is provided inside the combustion chamber. In a heating device that performs hot air heating and hot water heating, the hot water heat exchanger is connected to a storage tank, a circulation pump, and a radiator in order to form a circulation circuit.
This heating device is characterized in that a valve for opening and closing hot water circulation is provided in a conduit connecting the hot water heat exchanger and a storage tank, and when hot water heating is stopped, the circulation pump is stopped and the valve is closed.

<Operation> When a well-known combustion operation is performed, the combustion burner starts combustion.

The exhaust heat or exhaust gas heats the hot water heat exchanger 14 and radiates heat in the main heat exchanger 8 while being discharged from the exhaust pipe 9 to the outside.

At this time, due to the blowing action of the convection fan 10, indoor air is heat-exchanged from the suction port 24 through the main heat exchanger 8 and is discharged as warm air from the blow-off port 11 to perform hot air heating.

When the operating switch 21 is turned on at this time, the circulation pump 18 is driven, and the valve 20 is also opened at the same time, and the hot water in the hot water heat exchanger 14 is circulated from the storage tank 17 to the radiator 19 to perform hot water heating.

Next, since there is no need for hot water heating in this state, if only hot water heating is to be performed, turning off the operating switch 21 will stop the circulation pump 18 and at the same time close the valve 20.

Therefore, the hot water flow in the circulation circuit is stopped, but the hot water in the hot water heat exchanger 14 continues to be heated.
However, since the valve 20 is closed, the boiling vapor is directed not toward the storage tank 17 but through the conduit 15 toward the radiator 19.

In about 10 seconds, all of the hot water in the hot water heat exchanger 14 becomes boiling vaporized steam, and this vapor pressure causes the water in the radiator 19 to flow into the storage tank 17 while being slightly pushed up. The temperature of the vaporized vapor is lowered by the water in the radiator 19, and the vaporized vapor is returned to liquefaction.

Therefore, the valve 20 prevents the boiling vaporized vapor from being discharged into the storage tank 17 which is in communication with the atmosphere, and even if the boiling vaporized vapor is discharged into the radiator 19 which is in a closed state, no loud discharge sound is generated and the radiator is closed. 19 is absorbed inside the body.

In addition, once the inside of the hot water heat exchanger 14 is empty, the water will not flow again unless the valve 20 is opened or combustion is stopped, so even if combustion continues, there will be no strong discharge noise into the storage tank 17. It never occurs,
To restart hot water heating, turn on the operation switch 21.
Just turn it on.

<Example> Reference numeral 1 denotes a main body of an outdoor air intake/exhaust FF type heating device, which is provided with a cylindrical combustion chamber 2 inside.

A pot-type combustion burner 3 is provided at the bottom of the combustion chamber 2, and a multistage pilot ring 4 is installed in the combustion burner 3 to mix and rectify combustion air and vaporized fuel.

Reference numeral 5 denotes an intake cylinder, through which outside air is sucked in from outside using a combustion fan 6.

Combustion air taken in by the combustion fan 6 is supplied into the combustion burner 3 together with fuel from the fuel supply device 7.

Exhaust heat or exhaust gas generated by combustion flows into the main heat exchanger 8 and is discharged outside from the exhaust pipe 9 that overlaps with the intake pipe 17.

A convection fan 10 is provided at the rear of the main heat exchanger 8, which sucks indoor air, circulates it through the main heat exchanger 8, exchanges heat, and blows out hot air from the outlet 11 in front of the main body 1.

Reference numeral 12 denotes an opening provided in the front wall of the combustion chamber 2, and a removable lid 13 is attached to the opening, and when the lid 13 is opened, the inside of the combustion chamber 2 can be inspected and maintained.

A hot water heat exchanger 14 formed by spirally winding a pipe is protruded from the back side of the lid 13.
3, the hot water heat exchanger 14 is positioned above the combustion burner 3 in the combustion chamber 2.

Further, the conduits 15, 15 passing through the lid body 13 are connected to the main body 1.
It is connected within a circulation unit 16 which is arranged separately from the air conditioner.

The circulation unit 16 includes a storage tank 17 that communicates with the atmosphere to keep the temperature of the hot water constant and release the expansion of the hot water, and a circulation pump 18 that forcibly circulates the hot water in the hot water circuit. The hot water discharged from the tank is passed through the conduit 15 to the storage tank 1.
7, circulated through the radiator 19 by the circulation pump 18, and returned to the hot water heat exchanger 14.

In the middle of the conduit 15 between the hot water heat exchanger 14 and the storage tank 17, a valve 20 such as a solenoid valve is provided to open and close the flow of hot water.

An operating switch 21 is connected in series with a power source 22, and is connected in series with the circulation pump 18 and valve 20. When the operating switch is turned off, the circulation pump 18 is stopped and the valve 20 is closed.

23 is a temperature detection element such as a thermostat connected in series with the operating switch 21, the circulation pump 18, and the valve 20, which is attached to the conduit 15 on the side of the storage tank 17 and is normally closed, but opens when detected when the temperature exceeds a set temperature.

Reference numeral 24 denotes a suction port for sucking indoor air, which opens into the rear main body 1 of the convection fan 10.

If the circulation pump 18 fails while the operating switch 21 is closed, the temperature of the hot water heat exchanger 14 will overheat, the thermostat 23 will open, the valve 20 will be closed, and the water will be discharged to the radiator 19, so that the water is discharged to the storage tank 17. Prevents intense discharge noise.

Further, the boiling vaporized steam in the hot water heat exchanger 14 is liquefied in the radiator 19 and does not escape to the outside, so that the amount of hot water in the entire circulation circuit is less likely to decrease.

In another embodiment, the operating switch 21 may be replaced by a normally closed thermostat that opens upon detecting an abnormally high temperature of the hot water heat exchanger 14.

<Effect of the invention> A main heat exchanger 8 is connected to the combustion chamber 2 in which the combustion burner 3 is installed, and a convection fan 10 is provided behind the main heat exchanger 8 to blow out hot air. A heat exchanger 14 is installed internally, and the hot water heat exchanger 14 is sequentially connected to a storage tank 17, a circulation pump 18, and a radiator 19 to form a circulation circuit, thereby providing hot air heating and hot water heating. A valve 20 for opening and closing hot water circulation is provided in the conduit 15 connecting the hot water heat exchanger 14 and the storage tank 17, and when the hot water heating is stopped, the circulation pump 18 is stopped and the valve 20 is closed to close the same combustion burner hot air. It can perform heating and hot water heating, and with a simple switching operation, hot water heating can be stopped and only hot air heating can be performed.

Moreover, even when hot air heating is operated alone, there is no loud discharge noise unlike the conventional system, and the operation is quiet and highly safe.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of this invention, and FIG. 2 is an electric circuit diagram of the same. 2... Combustion chamber, 3... Combustion burner, 8... Main heat exchanger, 14... Hot water heat exchanger, 15, 15...
... Conduit, 17 ... Storage tank, 18 ... Circulation pump, 19 ... Heat radiator, 20 ... Valve, 21 ... Operation switch.

Claims (1)

[Scope of utility model registration request] A main heat exchanger 8 is connected to a combustion chamber 2 containing a combustion burner 3, and a convection fan 10 is provided behind the main heat exchanger 8 to blow hot air, while a hot water heat exchanger 14 is provided in the combustion chamber 2. The hot water heat exchanger 14 connects the storage tank 17, the circulation pump 18, and the radiator 19 in order to form a circulation circuit. A heating device characterized in that a valve 20 for opening and closing hot water circulation is provided in a conduit 15 connecting an exchanger 14 and a storage tank 17, and when hot water heating is stopped, the circulation pump 18 is stopped and the valve 20 is closed.