JP3042058B2 - 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 a fuel such as gas or petroleum, and condensing water vapor in exhaust gas to increase thermal efficiency and dissolving CO ₂ in water. It is.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional water heater, 1 is a combustion fan, 2 is a fuel regulator, 3 is a burner, 4 is a water regulator,
5 is a heat exchanger for sensible heat, 6 is a heat exchanger for latent heat, 7 is an exhaust passage, 8 is a collector, 9 is a neutralizer, 10 is a drain pipe, 11 is a temperature detector, 12 is a faucet, and 13 is a faucet. It is a controller.

After mixing the fuel from the fuel regulator 2 and the air from the combustion fan 1, a flame is formed in the burner 3. The water from the water amount regulator 4 condenses water vapor in the combustion gas from the burner 3 in the latent heat heat exchanger 6 to exchange latent heat. The exhaust gas is exhausted from the exhaust path 7, and the hot water from the latent heat exchanger 6 is further subjected to heat exchange in the sensible heat exchanger 5, and then is discharged from the faucet 12. The controller 13 controls the fuel regulator 2 and the combustion fan 1 to continue stable combustion, and controls the water regulator 4 by the temperature detector 11 to supply a predetermined amount of hot water. The condensed water condensed in the condensing heat exchanger 6 dissolves NO _x and SO _x, reduces the PH to about 3 and is stored in the collector 8, is neutralized by the neutralizer 9, and is discharged from the drain pipe 10. Is done.

[0004]

In such a conventional water heater, the neutralizer 9 is required because the condensed water PH becomes 3 or less. The neutralizer 9 has to be replaced frequently, and if the drainage is continued without the replacement, there is a problem that the high-pH condensed water may damage the concrete in the drainage ditch.

The present invention solves the above-mentioned problems of the prior art. By introducing condensed water directly into the hot water supply pipe, it is not necessary to provide a neutralizer in the drainage channel, and the drainage is not required. An object is to supply hot water in which carbon dioxide contained in introduced condensed water is dissolved.

[0006]

According to the present invention, there is provided a fuel conditioner for adjusting fuel, a combustion fan for feeding combustion air, and a burner for mixing and burning fuel and air. A water regulator that regulates the amount of water, a heat exchanger that exchanges heat between the combustion gas and water, a collector that collects condensed water condensed from the exhaust gas from the burner, and a collector that collects water in the hot water supply path of the heat exchanger. An introducer that introduces condensed water and exhaust gas from the vessel, an exhaust regulator that adjusts the amount of condensed water and exhaust gas introduced into the introducer, and a gas-liquid separator that communicates with the introducer and separates hot water and exhaust gas And an exhaust discharger that discharges the separated exhaust gas to the exhaust path, and a controller that controls the fuel regulator and the combustion fan and controls the water regulator and the exhaust regulator. In the present invention, a heat exchanger for sensible heat and a heat exchanger for latent heat are provided side by side, and a collector is provided below the heat exchanger for latent heat.

[0007]

The water heater according to the present invention operates as follows by the above configuration. Controlled by the controller, the fuel from the fuel regulator and the air from the combustion fan are mixed and then burnt in a burner to form a flame. The water from the water regulator is heated in the heat exchanger with the combustion gases. The combustion gas becomes a low-temperature exhaust gas after passing through the heat exchanger, and a part of the water vapor is condensed into condensed water and collected in the collector. At this time, the heat exchanger is provided with latent heat of condensation of water vapor, so that the efficiency becomes high. The hot water heated by the heat exchanger is sent to an introducer provided in the hot water supply pipe, and a part of the condensed water and the exhaust gas adjusted by the regulator by the discharge pressure of the hot water are introduced from the collector. At this time, the condensed water and the exhaust gas come into direct contact with the hot water in the hot water supply pipe to dissolve the carbon dioxide gas. After that, the hot water enters the gas-liquid separator and is separated into hot water and exhaust gas.If exhaust gas is present, the hot water is discharged from the exhaust discharger and returned to the exhaust path. Hot water is supplied. The controller controls the fuel regulator and the combustion fan to continue stable combustion, and controls the water regulator and the exhaust regulator to dissolve carbon dioxide gas to a predetermined solubility.

In addition, a heat exchanger for sensible heat and a heat exchanger for latent heat can be provided as a heat exchanger, and steam can be condensed only by the heat exchanger for latent heat.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a water heater according to the present invention will be described with reference to FIGS. 1, 2, 3, and 4. FIG. The same parts as those in the conventional example shown in FIG. 5 are denoted by the same reference numerals, and detailed description is omitted. In FIG. 1, reference numeral 15 denotes a direct-pressure edging device which is connected to a tap of the heat exchanger 5 for sensible heat, prevents backflow to a water pipe, and can use water pressure, and reference numeral 16 denotes a direct-pressure edging device 15
, And the condensed water and the exhaust gas are introduced from the collector 8 and mixed into the hot water, 17 is a gas-liquid separator connected to the introducer 16, and 18 is the residual exhaust gas to the exhaust path 7. An exhaust discharger, 19 is an exhaust adjuster for adjusting the amount of condensed water and exhaust gas entering the exhaust introducer 16 from the collector 8, and 20 is a hot water supply pipe.

Referring to FIG. 2, details of the introducer 16 are shown.
Reference numeral 21 denotes a hot water supply inlet, which communicates with the direct pressure type edger 15.
Reference numeral 22 denotes a hot water supply outlet, which communicates with the gas-liquid separator 17. 23
Is a nozzle, 24 is a venturi, and 25 is an exhaust inlet, which are connected to the collector 8. In FIG. 3, the gas-liquid separator 17
The details are shown below. 26 is a float and 27 is an exhaust outlet, which communicates with the exhaust path 7. Reference numeral 28 denotes an inlet connected to the hot water supply outlet 22 of the introducer 16, and reference numeral 29 denotes an outlet connected to the hot water supply pipe 20.

As shown in FIG. 1, the water heater of this embodiment mixes fuel from a fuel regulator 2 for adjusting fuel and air from a combustion fan 1 for feeding combustion air, and then supplies the mixed air to a burner 3. , Is ignited in the burner 3 and burns to form a flame. The water from the water regulator 4 condenses water vapor in the combustion gas from the burner 3 in the latent heat exchanger 6 to exchange latent heat, and the hot water from the latent heat exchanger 6 is further fin-pipe sensible heat. In the heat exchanger 5, the heat is indirectly exchanged with the combustion gas. The combustion gas passes through the sensible heat exchanger 5,
After condensed water is condensed by the latent heat exchanger 6, the exhaust gas becomes low-temperature exhaust gas and is discharged from the exhaust path 7. The condensed water is collected in the collector 8. At this time, the temperature of the exhaust gas is close to room temperature as shown in FIG.
(81%) to the efficiency A (97%) of the hot water supply apparatus of the present embodiment, so that the energy saving can be achieved. Further, by integrating the heat exchanger for sensible heat and the heat exchanger for latent heat, the equipment can be made small and inexpensive.

The hot water heated by the heat exchanger 5 for sensible heat is sent to an introducer 16 provided in a hot water supply path 20 a leading to a hot water supply pipe 20 while a backflow is prevented by a direct pressure type edger 15. As shown in FIG. 2, the introducer 16 includes a nozzle 23 connected to the hot water supply inlet 21 and a venturi 24 connected to the hot water supply outlet 22 for reducing a hot water supply pressure loss. A part of the condensed water and the exhaust gas adjusted in 19 are introduced from the collector 8 to the venturi 2
4 and directly in contact with hot water in the hot water supply pipe 20a to dissolve carbon dioxide gas. Thereafter, the hot water enters the gas-liquid separator 17 shown in FIG. 3 and is separated into hot water and exhaust gas. When exhaust gas is present in the exhaust discharger 18, the float 26 is lowered. When the hot water exists, the float 26 rises and closes the exhaust outlet. Further, the hot water in which the carbon dioxide gas is dissolved is supplied to the bath or shower from the hot water supply pipe 20. The controller 13 includes the fuel regulator 2 and the combustion fan 1
To continue the stable combustion of the burner 3 and control the water regulator 4 and the exhaust regulator 19 to dissolve the carbon dioxide gas to a predetermined solubility.

With such a configuration, the condensed water is directly supplied to the hot water supply pipe 2.
Since it is introduced at 0, the neutralizer 9 is not required as in the prior art, and condensed water does not corrode the drained concrete. In addition, since a hot water storage device for dissolving carbon dioxide is not required, the equipment becomes compact, and hot water can be supplied without a transporter by tap water pressure. There are advantages such as efficient dissolution. The obtained hot water in which the carbon dioxide gas 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.

Furthermore, since carbon dioxide and NO _x in the exhaust gas are dissolved, the emission of carbon dioxide, which causes global warming, can be reduced and NO _x can be suppressed. Further, the exhaust gas adjuster 19 can adjust the amount of exhaust gas and control the solubility of carbon dioxide dissolved in hot water from a high concentration to a low concentration.

[0015]

The present invention has the following effects due to the above-described configuration. (1) Since the condensed water collected in the concentrator is directly introduced into the hot water supply pipe, the conventionally required neutralizer is unnecessary, and the condensed water distribution pipe can be eliminated. (2) Since condensed water and exhaust gas are introduced directly into the hot water flowing through the hot water supply pipe to dissolve the carbon dioxide gas, not only is the hot water storage device of the prior art unnecessary, but the equipment becomes very compact,
Hot water can be transported without a transporter. Further, since carbon dioxide gas can be dissolved under high pressure under tap water pressure, it can be dissolved more efficiently than under atmospheric pressure. (3) Since condensed water or the like is introduced by an introducer utilizing hot water pressure, when there is no hot water pressure, that is, when there is no tap water pressure, nothing is introduced and foreign matter enters the water pipe. There is no danger of safety. (4) When hot water is supplied to a bath or shower, it exerts a heat retaining effect, a fatigue recovery effect, a blood pressure stabilizing effect, and a wound healing effect on the human body. (5) Since the latent heat of the water vapor in the exhaust gas is also recovered and the condensed water and the exhaust gas are directly introduced into the hot water, high efficiency is achieved. (6) Since carbon dioxide and NO _x in the exhaust gas dissolve,
It is possible to reduce the emission of carbon dioxide, which causes global warming, and to suppress NO _x . (7) The solubility of carbon dioxide dissolved in hot water can be controlled from a high concentration to a low concentration by the exhaust gas regulator.

[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 cross-sectional view of an exhaust gas introducer in the water heater.

FIG. 3 is a sectional view of a gas-liquid separator and an exhaust discharger in the water heater.

FIG. 4 is a graph showing the efficiency of the water heater and the conventional example.

FIG. 5 is a configuration diagram of a conventional water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion fan 2 Fuel regulator 3 Burner 4 Water regulator 5 Heat exchanger for sensible heat 6 Heat exchanger for latent heat 7 Exhaust passage 8 Aggregator 13 Controller 16 Introducer 17 Gas-liquid separator 18 Exhaust discharger 19 Exhaust regulation vessel

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F23J 11/00 F24H 1/00 602

Claims (2)

(57) [Claims] 1. A fuel regulator for regulating fuel, a combustion fan for feeding combustion air, a burner for mixing and burning fuel and air, a water regulator for regulating the amount of water, and a method for heating combustion gas and water. A heat exchanger to be exchanged, a collector for collecting condensed water condensed from the exhaust gas of the burner, and an introducer for introducing condensed water and exhaust gas from the collector into a hot water supply path of the heat exchanger. An exhaust adjuster for adjusting the amount of condensed water and exhaust gas introduced into the introducer, a gas-liquid separator communicating with the introducer to separate hot water and exhaust gas, and an exhaust discharge for discharging the separated exhaust gas to an exhaust path A water heater comprising a heater, a controller for controlling a fuel regulator and a combustion fan, and a controller for controlling a water regulator and an exhaust regulator. 2. The water heater according to claim 1, wherein a heat exchanger for sensible heat and a heat exchanger for latent heat are provided side by side as a heat exchanger, and a collector is disposed below the heat exchanger for latent heat.