JPS64494Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heating device that simultaneously performs indoor heating and floor heating using the heat generated by the combustion burner of the combustor.

Conventionally, as shown in Utility Application No. 59-13743 filed by the present applicant, a hot water heat exchanger was installed inside and connected to a radiator installed on the floor via a circulation pump, and hot water was heated by the heat generated by the combustion burner. A heater has been proposed that heats a heat exchanger to perform floor heating, and also blows hot exhaust air into the room as hot air for hot air heating. However, in this conventional example, when the circulation pump is stopped, floor heating is stopped, and only hot air heating is used, the hot water accumulated in the hot water heat exchanger is heated by the combustion burner and boils and vaporizes, causing an abnormal gurgling noise. The problem was that it would be in a dry firing state.

In view of this point, this idea was developed by providing an underwater opening in the water surface of the storage tank in the conduit connecting the heat exchanger and the storage tank, so as to prevent abnormal noises even when hot air heating is operated alone. An air opening is provided at the top, and one of the conduits connected to the heat exchanger is provided with a trap portion or a valve device, etc., which is guided above the water surface of the storage tank.

Next, the configuration of this invention will be explained based on an example.

Reference numeral 1 denotes the main body of the heating device, which is equipped with a combustion burner 2 of a liquid fuel vaporization type and burns it in a combustion tube 3.

A combustion fan 4 supplies primary air for combustion, and supplies fuel when a solenoid valve 5 is opened.

A porous catalyst body 6 for promoting oxidation of combustion gas and removing odor is provided at the upper end of the combustion tube 3, and a secondary air intake port 7 is provided at the lower end of the inner wall.

A convection fan 9 is provided above the combustion tube 3 with a heat shield plate 8 interposed therebetween, and blows hot exhaust air forward through an outlet 10 opened at the front of the main body 1.

11 is a suction port opened at the rear of the main body 1.

Reference numeral 12 denotes a heat-resistant heat exchanger made of stainless steel or the like that is wound around inside the combustion tube 3. Water enters from above and comes out from below. The storage tank 14 is connected to a storage tank 14 that communicates with the storage tank 14 and corresponds to fluctuations in the amount of hot water.

The water conduit 13 has an underwater opening 15 with its tip opened below the water surface of the storage tank 14, and further has an air opening 16 above the water surface.

This air opening 16 has a diameter of 3 to 4 mm and opens downward on the inner peripheral side of the bent portion 17 of the water conduit 13 as shown in the figure.
mm hole, or a thin tube with an inner diameter of 1 mm and a length of about 20 cm may be branched from the water conduit 13 and opened above the water surface in the storage tank 14.

The underwater opening 15 connects the heat exchanger 12 and the storage tank 1.
4 are in fluid communication and the air openings 16 are in pneumatic communication.

Reference numeral 18 denotes a circulation pump, which is connected between the storage tank 14 and a radiator 19 installed on the floor, and forcibly circulates hot water through the circuit.

The hot water leaving the radiator 19 is connected to the upper end of the heat exchanger 12 via a trap section 20.

The trap section 20 is a U-shaped bend of a conduit 21 connected to the other end of the heat exchanger 12 to a position above the water surface of the storage tank 14.

Further, instead of the trap section 20, a valve device 22 may be provided to open and close the hot water flow.

Note that in this embodiment, the heat exchanger 12 is located below the storage tank 14.

Next, to explain the operation, the heating device main body 1
is installed indoors, a radiator 19 is placed on the floor, and the combustion burner 2 is ignited and burned.

After the generated hot exhaust passes through the catalyst body 6, it is blown out as warm air from the outlet 10 by the convection fan 9 to heat the room.

During floor heating operation, the circulation pump 18 is driven to circulate hot water through the hot water circuit, absorbing heat within the heat exchanger 12 and dissipating the heat through the radiator 19.

At this time, hot water flows into the storage tank 14 through the underwater opening 15 of the conduit 13 and does not exit through the air opening 16.

The reason for this is that the pressure of the hot water flowing inside the conduit 13 is the lowest at the lower inner circumferential side of the bend 17 where the small hole is opened as the air opening 16. is something that does not appear.

When the floor heating is stopped and only hot air heating is performed, the driving of the circulation pump 18 is stopped and hot water circulation is stopped. Then, the hot water in the heat exchanger 12 gradually boils and vaporizes due to the combustion heat of the combustion burner 2, and an air opening 1 is formed in the storage tank 14 located at a higher position than the heat exchanger 12.
Steam flows into the heat exchanger 12 through the heat exchanger 12.
There will be no water inside.

Conventionally, when such a dry firing condition occurred, water vapor was supplied into the water in the storage tank 14, causing a gurgling sound, but if the air opening 16 is provided as in this invention, the water vapor in the water will not flow. No sound is generated as the power is no longer supplied.

Also, at this time, water no longer exists in the trap section 20 until the water level reaches the storage tank 14, leaving only an air layer, thus preventing water from flowing into the heat exchanger 12 again due to water pressure.

Since the storage tank 14 is located higher than the heat exchanger 12, water normally flows from the storage tank 14 to the heat exchanger 12 when the circulation pump 18 is stopped. With the provision of the section 16, water will not flow from the storage tank 14 even if the heat exchanger 12 becomes empty.

Once such a state is reached, it will remain in this state constantly and only hot air heating can be used while floor heating is stopped.

In this state, if the combustion burner 2 is extinguished or the heating power is reduced, air is sucked into the heat exchanger 12 through the air opening 16 and the hot air heating operation can be continued.

No sound is generated during this air suction.

Next time, if you also use floor heating, use circulation pump 1.
8, the heat exchanger 12 is filled with water and can be operated without any trouble.

Further, instead of the trap section 20, a valve device 22 may be provided in the middle of the conduit 21, and the valve device 22 may be closed when the floor heating is stopped and only hot air heating is operated.

Note that the same effect can be achieved even if a thin tube is used for the air opening 16, and other methods may be used for the trap portion 20 and the valve device 22 as long as the water flow closing means 23 is used.

As described above, this invention consists of a heat exchanger 12 heated by the combustion burner 2, a storage tank 14 located above the heat exchanger 12 and connected to the heat exchanger 12, and a circulation pump 18 that forcibly circulates hot water. The heat exchanger 12 and the storage tank 14 are connected in the case where a radiator 19 installed on the floor etc. is connected to perform floor heating etc. and indoor heating is performed using the combustion heat of the combustion burner 2. The conduit 13 is provided with an underwater opening 15 at the water surface in the storage tank 14 and an air opening 16 above the water surface, and furthermore, the other conduit 21 connected to the heat exchanger 12 is provided with a water flow closing means 23. Because it exists, it has the following effects.

In other words, even if the storage tank is located above the heat exchanger, floor heating and
To provide an easy-to-operate and comfortable heating device that can perform shared operation of normal heating as well as independent operation of normal heating, does not generate abnormal noise when floor heating is stopped.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of this invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIGS. 3 and 4 are diagrams showing other embodiments. 1...Heating device main body, 2...Combustion burner, 12
... heat exchanger, 13 ... conduit, 14 ... storage tank, 15 ... underwater opening, 16 ... air opening,
17...Bent part, 18...Circulation pump, 19...
...Radiator, 20... Trap part, 21... Conduit,
22...Valve device, 23...Water flow closing means.

Claims (1)

[Scope of claims for utility model registration] (1) Heat exchanger 1 heated by combustion burner 2
2. A storage tank 14 located above the heat exchanger 12 and connected to the heat exchanger 12, a circulation pump 18 that forcibly circulates hot water, and a radiator 19 installed on the floor etc. are connected to provide floor heating, etc. In the case where indoor heating is performed using the combustion heat of the combustion burner 2, an underwater opening 15 is connected to the conduit 13 connecting the heat exchanger 12 and the storage tank 14 under the water surface in the storage tank 14. A heating device characterized in that an air opening 16 is provided above the water surface, and a water flow closing means 23 is further provided in the other conduit 21 connected to the heat exchanger 12. (2) The heating device according to item 1 of the utility model, wherein the water flow closing means 23 is a trap portion 20 formed by guiding a part of the conduit 21 above the water surface of the storage tank 14. (3) The heating device according to item 1 of the utility model, wherein the water flow closing means 23 is a valve device 22 provided in the conduit 21.