JPH046326A - Hot water heating stove - Google Patents

Abstract

PURPOSE:To eliminate a boiling state of circulation water and reduce noise by a method wherein an extreme end of a hot water pipe of a hot water heat exchanger is spaced apart above a water surface of a sub-tank, opened freely expanded or retracted and immersed below the water surface of the sub-tank when a circulation pump is operated. CONSTITUTION:An extreme end 9a of a heat pipe 9 is of a belows type or a double- pipe and can be expanded or retracted in a vertical direction. When the pipe is extended downwardly, the opening of the extreme end 9a is immersed in the sub-tank 19 and in turn when the pipe is retracted upwardly, the opening is spaced apart upwardly from the water surface 19a. When a hot water heating operation is set, heating water (hot water) for use in heating operation is flowed in the hot water pipe 9 with a circulation pump 20. This water is heated to become hot water, the hot water flows from the sub-tank 19 and the circulation pump 20 through a hot water outer 21, is returned back to a hot water return port 18 and circulates. Water flowing from the hot water pipe 9 toward the sub-tank 19 does not generate any sound, but flows toward the sub-tank 19. In the event that the hot water heating operation is not carried out, water in the hot water pipe 9 drops into the sub-tank 9 due to a difference in the head and the pipe is vacated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a simple hot water heating stove.

2. Prior Art Conventionally, this type of stove has a burner 3 as shown in FIG.
A combustion tube 32 is connected above 1, and a damper 3 is connected above it.
A hot water heat exchanger 34 is connected via 3. The hot water pipe 35 of this hot water heat exchanger 34 has a sub tank 36,
It is connected to a heat radiating device 38 via an St pump 37, and the sub tank 36 and circulation pump 37 are provided on the hot water inflow side. The opening at the tip of the hot water pipe 35 was located above and apart from the water surface 39 of the sub tank 36. This is the hot water pipe 3 inside the hot water heat exchanger 34.
This is to prevent the circulating water in the tank from boiling. In other words, when only the stove is used without heating with hot water, the damper 33 is closed to prevent combustion gas from flowing into the hot water heat exchanger 34, but the combustion gas inevitably flows into the hot water heat exchanger 34. and heats the hot water pipe 35. As a result, if any circulating water remains in the hot water pipe 35, it will be heated and boil after a while, creating a very dangerous situation. When the hot water heating operation is not performed, that is, when the circulation pump 37 is stopped, the circulating water in the hot water vibrator 35 is caused to fall into the sub-tank 36 by the head, so that the hot water vibrator 35 is emptied. be.

Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, during hot water heating operation, the circulating water in the hot water pipe 35 falls into the sub tank 36, resulting in a constant swishing sound, etc. There was a problem with high noise level.

The present invention was made in view of these points, and aims to eliminate boiling of circulating water and reduce noise at the same time.

Means for Solving RR In order to achieve the above object, the present invention provides a burner, a hot water heat exchanger heated by the burner, a heat radiating device connected to the hot water heat exchanger, and the hot water heat exchanger. and heat dissipation I
A circulation pump and a sub-tank connected between the sub-tank and the sub-tank are provided, the sub-tank is provided on the hot water inflow side, and the tip of the hot water pipe of the hot water heat exchanger is opened above the water surface of the sub-tank, The tip of the hot water pipe is extendable and retractable so that it is submerged below the water surface of the sub-tank when the circulation pump is in operation.

Function: Due to the above-described configuration, the tip of the hot water pipe is submerged under the water surface of the sub-tank during hot water heating operation, so there is no crunching sound when the circulating water in the hot water vibrator falls into the sub-tank. In addition to greatly reducing noise, when hot water heating is not in operation, the tip of the hot water pipe is located above the water surface of the subtank, so the circulating water in the hot water pipe falls into the subtank and becomes empty, preventing boiling, etc. There is no danger.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

In FIGS. 1 and 2, 1 is a burner that burns liquid fuel, 2 is a fuel pump that sends fuel to the burner 1, and 3 is a blower fan that also sends combustion air to the burner 1. A combustion cylinder 5 having an incandescent body 4 inside is connected to the upper part of the burner l, and a main heat exchanger 6 is connected to the upper part of the combustion cylinder 5. A heat-resistant glass 7 is attached to the front surface of the combustion tube 5, and is configured to radiate the light and heat from the incandescent body 4 toward the front of the stove through an opening 8 on the front surface of the main body. In addition, a hot water heat exchanger 10 in which a hot water pipe 9 is housed is provided at the rear of the combustion tube 5.
is provided, and its inlet side is connected to the main heat exchanger 6 of the combustion tube 5.
It is connected to a branch port 11 provided on the back side of the burner side from the communication part with the burner. An exhaust switching chamber 13 is provided at the outlet section 12 of the hot water heat exchanger 0, and this exhaust switching chamber 13 is connected to the exhaust section 14 of the main heat exchanger 6. Further, the exhaust switching chamber 13 is provided with a switching damper 15 therein, and is configured to select either the main heat exchanger 6 or the hot water heat exchanger 10 as the path for the combustion gas. The exhaust switching chamber 13 is connected to an exhaust pipe 16, and exhaust gas is discharged outside through an air supply and exhaust pipe 17. Further, the hot water pipe 9 has one end connected to a hot water return port 18.
The other end is connected to the sub-tank 19, and the hot water is sent from the sub-tank 19 to the hot water outlet 21 by the circulation pump 20.
The hot water is then sent to an external heat radiating device 22 such as a floor heating panel, and then returned to the hot water return port 18.

The tip 9a of the hot water pipe 9 is a bellows or double pipe that can be expanded and contracted up and down.
19a, and when retracted upward, it separates and opens above the water surface 19a. 23 is a driver such as an electromagnetic plunger that moves the tip 9a of the hot water pipe 9 up and down, and 24 is a control unit that controls the driver 23, which moves the tip 9a of the hot water pipe 9 downward by operation of the circulation pump 2o. It is controlled so that the tip 9a of the hot water pipe 9 is contracted upward when the circulation pump 20 is stopped.

To explain its operation in the above configuration, first, when floor heating and stove radiant heating are operated simultaneously, burner 1 starts combustion using liquid fuel sent from fuel pump 2 and combustion air sent from blower fan 3. , producing flame and combustion gases. The combustion gas first heats the incandescent element 4 at the top of the burner 1, making it red-hot. At this time, the red-hot body 4 is
The heat and light are radiated from the heat-resistant glass 7 attached to the combustion tube 5 to the front side through the opening 8 on the front side of the main body.

On the other hand, when the hot water heating operation is set, the circulation pump 20 has started operating, and the switching damper 15 has also been switched to the hot water heat exchanger side (the state indicated by the solid line in the figure).

Therefore, the combustion gas that has passed through the incandescent body 4 does not flow to the main heat exchanger 6 at the upper part of the combustion tube 5, but flows from the branch port 11 on the back side of the combustion tube 5 to the hot water heat exchanger 10. The combustion gas that has entered the hot water heat exchanger 10 heats the hot water pipe 9 therein, but the inside of the hot water vibrator 9 is filled with water for heating (hot water).
This water is heated and turned into hot water, which exits from the sub-tank 19 and the circulation pump 20 through the hot water outlet 21, returns to the hot water return port 1, and is circulated again. The combustion gas that has passed through the hot water heat exchanger 1O-t- then flows from the outlet section 12 to the exhaust switching chamber 13, passes through the exhaust pipe 16, passes through the supply and exhaust pipe 17, and is discharged outside as exhaust gas.

Here, the tip 9a of the hot water pipe 9 is submerged under the water surface of the sub tank 19 due to the operation of the circulation pump 20, and the water flowing from the hot water pipe 9 to the sub tank 19 flows into the sub tank 19 without making a loud noise. It starts to flow.

On the other hand, when performing only radiant heating using a stove without hot water heating operation, the circulation pump 20 is not operated, the switching damper 5 is switched to the position indicated by the broken line in Fig. 1, and the combustion gas is transferred to the hot water heat exchanger side 0. It flows into the main heat exchanger 6 without passing through it, is radiated by the main heat exchanger 6, enters the exhaust switching chamber 13 from the exhaust section 14 of the main heat exchanger 6, and is exhausted through the exhaust pipe 16.

At this time, the hot water pipe 9 does not operate the circulation pump 20, so its tip 9a is pulled upward by the driver 23, and the water in the hot water pipe 9 falls into the sub tank 19 due to the head difference and becomes empty. ing. Therefore, even if a part of the combustion gas flows into the hot water heat exchanger 10 and heats the hot water pipe 9, the inside of the hot water pipe 9 is empty, so the water will not boil and can be used without worry. .

In the description of the above embodiments, the stove is of the radiant type, but the stove may be of the hot air type, and the fuel may be gaseous fuel instead of liquid fuel.

Effects of the Invention As is clear from the description of the embodiments, according to the present invention, the tip of the hot water vibrator is submerged under the water surface of the sub-tank during hot water heating operation, so it is possible to operate with low noise. When the hot water pipe is used as a simple stove without hot water heating operation, the tip of the hot water pipe is located far above the water surface of the sub tank, so the water in the hot water pipe falls into the sub tank and becomes empty. The water in the hot water pipe will not boil, so you can use it with confidence.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the internal structure of a hot water heating stove according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view showing the internal structure of a conventional hot water heating stove. It is. 1... Burner, 5... Combustion cylinder, 6...
...Main heat exchanger, 9...Hot water vibrator, 9
a...Tip of hot water vibrator, 10...
Hot water heat exchanger, I5...Switching damper, 20.
... Circulation pump, 23 ... Drive body, 24
...control section.

Claims (1)

[Claims] It includes a burner, a hot water heat exchanger heated by the burner, a heat radiating device connected to the hot water heat exchanger, and a circulation pump and a sub-tank connected between the hot water heat exchanger and the heat radiating device. , the sub-tank is provided on the hot water inflow side, the tip of the hot water pipe of the hot water heat exchanger is opened above the water surface of the sub-tank, and the tip of the hot water pipe is extendable and retractable to control the operation of the circulation pump. At the time, the hot water heating stove was submerged below the water surface of the sub-tank.