JP2964642B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater for heating water by burning fuel such as gas or petroleum.
₂ is dissolved in water.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional water heater, 1 is a water heater, 2 is a fuel regulator, 3 is a burner, 4 is an igniter, 5 is a combustion fan, 6 is a water regulator, 7 is a sprayer, 8 is a direct heat exchanger, 9 is a water heater, 10 is a water level sensor, 11 is a carrier,
Reference numeral 12 is an exhaust port, and 13 is a controller.

After the fuel from the fuel regulator 2 and the air from the combustion fan 5 are mixed, the mixture is ignited by an igniter 4 and a flame is formed in a burner 3. The water from the water regulator 6 is sprayed by the sprayer 7
It is sprayed and directly contacted with a large number of metal pieces and the like heated by the combustion gas in the direct heat exchanger 8 and heated. The exhaust gas is exhausted from an exhaust port 12, the hot water is further heated by a flame, and then stored in a hot water storage 9, and the water level is monitored by a water level sensor 10. Supplied to the point.

The purpose of this water heater 1 is to absorb the latent heat of the combustion gas to increase the efficiency, and only a part of the CO _{2 of} the combustion gas is dissolved.

[0005]

In such a conventional water heater, since high-temperature combustion gas and water are directly heat-exchanged, naturally, the efficiency is high, but the solubility of CO ₂ is high. However, there is a problem that the melting point is reduced and only a small amount is dissolved.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a fuel regulator for regulating fuel, a combustion fan for feeding combustion air, a burner for burning fuel and air, and a water regulator. An indirect heat exchanger that indirectly exchanges heat between combustion gas and water, an exhaust guide path that guides exhaust gas, and a dissolver that dissolves CO _{2 in} exhaust gas.
A direct heat exchanger to directly heat exchange with hot water downstream of the dissolver heated by exhaust gas and indirect heat exchanger, dissolver with CO ₂
And a controller that controls the fuel regulator and the combustion fan to maintain stable combustion, and controls the water regulator and the transporter to supply predetermined hot water. It consists of.

[0007] Further, a configuration is also adopted in which the solubility of CO ₂ is adjusted by an exhaust adjuster provided in the exhaust guide path.

[0008]

The present invention operates as follows by the above configuration. After mixing the fuel from the fuel regulator with the air from the combustion fan, it burns in a burner to form a flame. Water from the water regulator is heated by the combustion gas in the indirect heat exchanger. After passing through the indirect heat exchanger, the combustion gas becomes low-temperature exhaust gas, enters the melter through the exhaust guide path, and dissolves CO ₂ in the hot water stored in the melter. The hot water heated by the indirect heat exchanger is sent to the direct heat exchanger, where the hot water is directly contacted with the exhaust gas, which has become lower in temperature, and CO ₂ is dissolved. The exhaust gas is exhausted from the exhaust port, and the hot water stored in the dissolver is transported by the transporter. The controller controls the fuel regulator and the combustion fan to continue stable combustion, and controls the water regulator, the dissolver and the transporter to supply hot water in which CO ₂ is dissolved to a target location.

Further, by controlling the amount of exhaust to be sent directly to the heat exchanger by the exhaust regulator installed in the exhaust guide path, to control the solubility of CO ₂ to be dissolved in hot water.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a water heater according to the present invention will be described with reference to FIGS.

In FIG. 1, 14 is an indirect heat exchanger, 15
Denotes an exhaust guide path, and 16 denotes a dissolver. In FIG. 2, 1
7 is an exhaust adjuster, and 18 is an exhaust adjuster. 1 and 2
In FIG. 3, the same members as those in FIG. 3 are denoted by the same reference numerals.

This embodiment has the same basic configuration as the water heater 1 shown in FIG. 1, in which fuel from a fuel regulator 2 for adjusting fuel and air from a combustion fan 5 for sending combustion air are mixed. After that, it is ignited by the igniter 4 in the burner 3 and burns to form a flame. The water from the water regulator 6 is indirectly heat-exchanged with the combustion gas in a fin-pipe indirect heat exchanger 14. After passing through the indirect heat exchanger 14, the combustion gas becomes low-temperature exhaust gas and passes through the exhaust guide path 15 to the
Then, the CO ₂ is dissolved in the hot water stored in the dissolver 16. At this time, the temperature of the exhaust gas is about 20 ° C. and passes through the hot water stored in the melting device 16 while bubbling, so that the CO ₂ is easily dissolved. The hot water heated by the indirect heat exchanger 14 is sent to the direct heat exchanger 8, and in this embodiment, the exhaust gas, which has a lower temperature in the direct heat exchanger 8 constituted by the sprayer 7, is sprayed from the sprayer 7. Direct contact with hot water further dissolves CO ₂ . The exhaust gas is exhausted from an exhaust port 12 and the hot water stored in the melter 16 is transported by a transporter 11 such as a pump. The controller 13 controls the fuel regulator 2 and the combustion fan 5 and the igniter 4 to ignite,
While continuing the stable combustion, while monitoring the water level by the water level sensor 10 provided in the dissolver 16,
And the transporter 11 are controlled so that hot water in which CO ₂ is dissolved is supplied to a target location.

The hot water in which the CO ₂ is dissolved is supplied to a bath or a shower, and exerts a heat retaining effect, a fatigue recovery effect, a blood pressure stabilizing effect, and a wound healing effect on the human body.

Further, since heat is exchanged between the indirect heat exchanger and the direct heat exchanger, the latent heat of water vapor in the exhaust gas is also recovered, and the efficiency is as high as about 100%.

Further, since CO ₂ and NOx in the exhaust gas are dissolved, the emission of CO ₂ which causes global warming is reduced by 3%.
0% can be reduced, and NOx can be suppressed by 80%.

Further, as shown in FIG.
In this configuration, the opening degree of the exhaust adjustment port 18 is adjusted, the amount of exhaust gas sent directly to the heat exchanger 8 is controlled, and the solubility of CO ₂
If the temperature is 0 ° C., the concentration can be controlled from high concentration to 50 PPM.

[0017]

According to the above-described structure, the present invention has the following effects. (1) Hot water in which CO ₂ is dissolved is supplied to a bath or shower, and exerts a heat retaining effect, a fatigue recovery effect, a blood pressure stabilizing effect, and a wound healing effect on the human body. (2) Since heat is exchanged between the indirect heat exchanger and the direct heat exchanger, the latent heat of water vapor in the exhaust gas is also recovered, and the efficiency is as high as about 100%. (3) Since CO ₂ and NOx in the exhaust gas are dissolved, the emission of CO ₂ , which causes global warming, can be reduced by 30% and the NOx can be suppressed by 80%. (4) The solubility of CO ₂ dissolved in the hot water can be controlled from a high concentration to 50 PPM by using an exhaust adjusting port provided in the exhaust guide path, if the temperature of the hot water is 40 ° C.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a water heater according to one embodiment of the present invention.

FIG. 2 is a configuration diagram of an exhaust adjuster in the water heater.

FIG. 3 is a configuration diagram of a conventional water heater.

[Explanation of symbols]

 Reference Signs List 3 burner 5 combustion fan 8 direct heat exchanger 13 controller 14 indirect heat exchanger 15 exhaust guide path 16 melting device

Claims (2)

(57) [Claims] 1. A fuel regulator for regulating fuel, a combustion fan for feeding combustion air, a burner for burning fuel and air, a water regulator for regulating water flow, and indirectly heating combustion gas and water. An indirect heat exchanger for exchange, an exhaust guide path for guiding exhaust gas, and a dissolver for dissolving CO ₂ in the exhaust gas,
A direct heat exchanger to directly heat exchange with hot water downstream of the dissolver heated by exhaust gas and indirect heat exchanger, dissolver with CO ₂
And a controller that controls the fuel regulator and the combustion fan to maintain stable combustion, and controls the water regulator and the transporter to supply predetermined hot water. Water heater consisting of. 2. The water heater according to claim 1, wherein the solubility of CO ₂ is adjusted by an exhaust adjuster installed in the exhaust guide path.