JPS60233444A - Hot water supplier - Google Patents

Abstract

PURPOSE:To obtain hot water of desired temperatures instantaneously without the needs to circulate water to be heated by providing a pressure reducing arm involving a pressure-reducing tube and a hot supply tube is provided for a hot water storage and supply tube. CONSTITUTION:When a device is actuated, a burner 2 is ignited, and water 19 is partly evaporated until the pressure of a pressure-reducing tube 17 reaches a given pressure. The burner 2 is then extinguished. When a hot water supply stopper 11 is closed, the burner 2 is ignited only for supplementing the released heat quantity. Since the tube 17 and a pressure-reducing arm 18 connected to the tube 17 are an enclosed container with a boundary face between gaseous and liquid phases, the internal temperature is kept constant if the pressure is made constant. When the stopper 11 is opened, hot water of a desired temperature set by the pressure begins to go out, and also when low-temperature water is flowed in from a water supply tube 8, the steam is condensed, the water is heated by the latent heat of the evaporation to raise the temperature of water to a desired temperature immediately. When the steam is condensed and the pressure is reduced, the burner 2 is soon ignited and continues to burn with a given combustion rate.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a combustion device that burns fuel such as gas or oil to supply hot water, and is a so-called instant hot water combustion device that can quickly supply desired hot water at the time of use. Regarding a certain water heater.

Configuration of a conventional example and its problems A conventional example of a hot water storage type water heater will be explained with reference to FIG. 1 is a fuel pipe, 2 is a burner, 3 is a combustion chamber, 4 is a heat transfer pipe, 5 is a hot water storage pipe body, 6 is an exhaust chamber, 7 is a combustion fan, 8 is a water supply pipe, 9 is a pump, 10 is a hot water supply pipe, 11 is a hot water tap, 1
2 is a hot water supply return pipe, 13 is a fuel control valve, and 14 is a temperature detection element.

Water supplied from the water supply pipe 8 fills the hot water storage pipe 5, and the fuel control valve 13 controls the fuel supplied through the fuel pipe 1 so that the temperature of the hot water is constant using the temperature detection element 14. The fuel is combusted in a burner 2 installed upstream of the combustion chamber 3, and the combustion gas is heated in a heat transfer pipe 4 and then sent to an exhaust chamber 6.
is collected and discharged to the outside by a combustion fan 7. The hot water in the hot water storage pipe body 5 is circulated through the hot water supply pipe 10 and hot water return pipe 12 by the pump 9 immediately before hot water supply is desired, and when the hot water tap 11 is opened, the desired hot water temperature can be obtained instantly. Become.

Although the above-described configuration and operation meet the requirements for localization, there are the following problems.

(1) In addition to the hot water supply pipe 10, a hot water supply return pipe 12 is arranged to circulate hot water, which requires enormous construction costs and is not practical.

2 The device was heavy because the hot water storage pipe body 5 was filled with water.

■ The temperature of the water inside the tube was controlled by one or two temperature sensing elements, so the temperature distribution was wide.

OBJECTS OF THE INVENTION The present invention solves these conventional problems, and uses a pressure reduction pipe instead of a hot water storage pipe and a pressure reduction arm that includes a hot water supply pipe to instantly provide the desired hot water without circulating hot water. The purpose is to obtain, that is, locality.

Structure of the Invention For the above-mentioned purpose, the present invention provides a burner, a combustion chamber, a heat transfer pipe through which combustion gas passes, which is provided downstream of the combustion chamber, a wick material closely attached to the outside of the heat transfer pipe, and a A pressure reducing pipe that encloses a heat transfer pipe and is filled with a predetermined amount of water after being depressurized by evacuation, a water supply pipe that extends inside the pressure reduction pipe, and a water supply pipe connected to the water supply pipe that goes around the outside of the heat transfer pipe. at least one hot water supply pipe extending to the hot water tap after the heating, a pressure reduction arm that includes the hot water supply pipe and is connected to the pressure reduction pipe body, and a combustion fan provided downstream of the heat transfer pipe;
The structure includes a pressure sensing element provided on the outer wall of the pressure reducing pipe, and a fuel control valve that controls fuel using the pressure sensing element.

Description of examples An embodiment of the water heater of the present invention will be described with reference to FIG.

Note that the same members as in FIG. 1 are given the same numbers.

15 is a water supply branch pipe, 16 is a wick material, 17 is a pressure reducing pipe body, 18 is a pressure reducing arm, 19 is water, and 20 is a pressure sensing element. A burner 2 is provided upstream of the combustion chamber 3, and three heat transfer pipes 4 are connected downstream of the combustion chamber 3. A wick material 16 is adhered to the outside of the heat transfer pipe, and a pressure reducing tube 17 provided to enclose the heat transfer pipe is evacuated and then filled with a predetermined amount of water. Since the pressure is reduced, most of the sealed water turns into water vapor, and a small amount of water 19 remains. A water supply pipe 8 extends from the pressure reducing pipe body 17 and is connected to a hot water supply pipe 10 through a water supply branch pipe 15. The hot water supply pipe 10 extends around the outside of the heat transfer pipe 4 and then reaches the hot water tap 11. A depressurizing arm 18 is provided so as to encompass the hot water supply pipe 10, and the depressurizing pipe body 17
It is connected to A pressure sensing element is provided on the outer wall of the pressure reducing tube 17 and controls the fuel control valve 13 so that the internal pressures of the pressure reducing tube 17 and the pressure reducing arm 18 are constant. Combustion gas that has passed through the heat transfer pipe 4 is collected in an exhaust chamber 6 and exhausted to the outside by a combustion fan 7.

When the charging starts, the burner 2 is ignited, and after some of the water 19 has evaporated until the pressure in the pressure reducing tube 17 reaches a predetermined pressure, the burner 2 is extinguished. When the hot water tap 11 is closed, the burner 2 is only ignited to replenish the amount of heat released. Since the pressure reducing tube 17 and the pressure reducing arm 18 connected thereto are closed containers having a gas-liquid interface, all internal temperatures remain constant if the pressure is kept constant. Hot water tap 11
When the is opened, hot water starts to be dispensed at the desired temperature set by the pressure, and when low-temperature water flows in from the water supply pipe 8, the water vapor condenses and heats the water with the latent heat of condensation, quickly bringing the water temperature to the desired temperature. raise. As soon as the water vapor condenses and the pressure decreases, the burner 2 is ignited and combustion continues at a predetermined amount.

As long as the pressure is kept constant, condensation occurs isothermally at any location, so the temperature remains constant. Unlike temperature uniformity due to convection, etc., there is no temperature distribution because the temperature distribution is determined by the pressure propagation speed.

The above configuration provides the following effects. Hot water tap 11
As soon as you open it, you can get the hot water you want.

Similar results can be obtained even if there are a plurality of hot water taps as shown in FIG. Moreover, even if the amount of hot water supplied varies, fluctuations in hot water temperature can be almost eliminated. Its accuracy is determined by the pressure sensing element 20.
It depends on the control accuracy of the fuel control valve 13. Also, the sensible heat of water is IKcal/Kg, but the latent heat is 573
Since the ratio is K cal /Kg, the weight of the device is extremely light in order to obtain the same hot water supply capacity. Since the pressure reducing pipe body 17 is depressurized, there is little corrosion, and it does not become a pressure vessel, so it has a high degree of safety. Further, since the interior of the pressure reducing tube 17 and the pressure reducing arm 18 is water vapor, unlike water, the heat transfer coefficient to the outside is low and heat radiation measures are relatively easy.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) By isothermal condensation of steam, hot water at a predetermined temperature can be obtained instantaneously without circulating hot water or discarding dead water in pipes in advance.

■ The weight of the device is light because the pipe body is not filled with water but is filled with water vapor.

■ Since the inside of the tube is under reduced pressure, it is less likely to corrode and has a high degree of safety.

■ Since the inside of the tube is water vapor, it releases less heat than water and is easier to insulate.

6. By isothermal condensation of water vapor, the temperature of any place can be equalized simply by keeping the pressure constant, and even if there are multiple hot water supply taps and the amount of water supplied changes significantly, the temperature of the hot water does not change.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional hot water storage type water heater, and FIG. 2 is a sectional view of a water heater that is an embodiment of the present invention. 2...Burner, 3...Combustion chamber, 4...
...Heat transfer pipe, 6...Exhaust chamber, 7...
... Combustion fan, 8... Water supply pipe, 10...
...Hot water pipe, 13...Fuel control valve, 16...
...Wick material, 17...Reducing pressure pipe body, 18
...Decompression arm, 19...Water, 2o...
...Pressure sensing element.

Claims (1)

[Claims] A burner, a combustion chamber, a heat transfer pipe provided downstream of the combustion chamber through which combustion gas passes, a wick material tightly attached to the outside of the heat transfer pipe, and a vacuum-extracting material that encloses the heat transfer pipe. A pressure reducing tube body filled with a predetermined amount of water after being depressurized by the pressure reducing tube body, a water supply pipe extending into the pressure reducing pipe body, and a water supply pipe connected to the water supply pipe and circulating near the outside of the heat transfer pipe until reaching the hot water tap. at least one hot water pipe extending;
A decompression arm that includes the hot water supply pipe and is connected to the decompression pipe body, a combustion fan provided downstream of the heat transfer pipe, a pressure detection element provided on the outer wall of the decompression pipe body, and a pressure detection element that controls the fuel consumption. A water heater consisting of a fuel control valve and a fuel control valve.