JP3278955B2 - 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 dissolving carbon dioxide in a combustion gas of a water heater using gas or oil as fuel to obtain hot water containing carbon dioxide gas.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional water heater includes a fuel regulator 1 for adjusting a fuel amount, a combustion blower 2 for supplying combustion air, and a burner for mixing fuel and combustion air for combustion. 3 and a heat exchanger 4 for exchanging heat between combustion gas and water
And an exhaust passage 5 for the combustion gas after the heat exchange, and an introduction passage 6 provided in the hot water supply passage 4a of the heat exchanger 4 for introducing the combustion gas from the exhaust passage 5 and supplying the introduced combustion gas with hot water. , An exhaust adjuster 8 provided in the introduction path 6 for adjusting the amount of combustion gas introduced into the mixer 7, and a mixer 7 provided downstream of the mixer 7 for dissolving carbon dioxide gas. It comprises a separator 9 for separating hot water and undissolved gas, and a discharge path 10 for discharging undissolved gas from the separator 9 to the exhaust path 5.

The water heater mixes fuel and combustion air supplied from a fuel conditioner 1 and a combustion blower 2 and burns them with a burner 3, and generates generated combustion gas through a water and heat exchanger 4. Then, the combustion gas after the heat exchange is exhausted from the exhaust path 5. The amount of combustion gas is adjusted from the exhaust path 5 via an introduction path 6 by an exhaust gas regulator 8 and introduced into a mixer 7 provided in a hot water supply path 4a. Is dissolved in hot water. Separator 9 provided on the downstream side of mixer 7 combines hot water in which carbon dioxide gas is dissolved and undissolved gas.
Then, the undissolved gas is discharged to the exhaust path 5 via the discharge path 11, and hot water in which the carbon dioxide gas is dissolved is supplied to the bath to provide a bath in which the carbon dioxide gas is dissolved.

[0004]

However, in the above-described conventional configuration, when the high-temperature combustion gas passes through the introduction path, it is cooled by the introduction path to generate dew water, and the dew water is supplied to the introduction path and the exhaust gas regulator. Therefore, there is a problem that the combustion gas passage area of the introduction path and the exhaust gas regulator is reduced, and the amount of combustion gas introduced into the mixer is reduced, and the solubility of carbon dioxide in the combustion gas is reduced. .

[0005] The present invention has been made to solve the above-mentioned problems, and a first
The purpose of this method is to prevent the condensation of condensed water from occurring in the introduction path and the exhaust controller due to the generation of dew water in the introduction path, and to reduce the area of the combustion gas passage in the introduction path and the exhaust controller. The amount of combustion gas introduced into the vessel is ensured to prevent the solubility of carbon dioxide from decreasing.

A second object of the present invention is to prevent dew water from being generated in the introduction path and the exhaust regulator, and to prevent dew water from accumulating in the introduction path and the exhaust regulator and to burn the introduction path and the exhaust regulator. An object of the present invention is to prevent the area of the gas passage from being reduced and to secure the amount of combustion gas introduced into the mixer to prevent the solubility of carbon dioxide gas from decreasing.

[0007]

In order to achieve the first object, the present invention provides a combustion blower for supplying combustion air, a burner for mixing fuel and combustion air for combustion, and a method for heating combustion gas and water. A heat exchanger to be exchanged, an exhaust path for the combustion gas after the heat exchange, an introduction path for introducing the combustion gas from the exhaust path, and a combustion path that is provided in the hot water supply path of the heat exchanger and is introduced through the introduction path. A mixer for dissolving carbon dioxide in the gas in hot water,
An exhaust adjuster provided in the introduction path for adjusting the amount of combustion gas introduced into the mixer; a separator having a liquid level detector for separating hot water in which carbon dioxide gas is dissolved from undissolved gas; A discharge path for discharging gas from the separator to the exhaust path,
A dew water chamber is provided in the introduction path, and the dew water chamber and the separator are connected to each other via a dew water path having a dew water regulator.

Further, the present invention achieves the second object,
The surface area of the dew condensation chamber is made larger than the surface area of the introduction path.

[0009]

According to the first aspect of the present invention, the combustion gas after the heat exchange is adjusted from the exhaust passage through the introduction passage by the exhaust gas regulator and introduced into the mixer provided in the hot water supply passage. Is done. The combustion gas introduced into the mixer is mixed with the hot water, the carbon dioxide gas in the combustion gas is dissolved, and the other combustion gases are sent as undissolved gas to the separator. Then, the undissolved gas is discharged to the exhaust path via the discharge path. Even if high-temperature combustion gas generates condensation water in the introduction path, the condensation water is stored in the condensation water chamber, so the dew water stays in the introduction path and the exhaust gas regulator and the combustion gas passage of the introduction path and the exhaust gas regulator. The area can be prevented from being reduced, and the amount of combustion gas passing through the introduction path and the exhaust gas regulator can be secured to prevent the solubility of carbon dioxide gas from decreasing.

Further, by introducing the dew water collected in the dew water chamber into the separator through the dew water regulator, the degassed carbon dioxide gas in the separator is brought into contact with the dew water again in the dew water channel,
This prevents the solubility of carbon dioxide gas from decreasing.

[0011] Further, according to the second configuration, since the area in which the combustion gas comes into contact with the dew condensation chamber is large, the dew condensation of the combustion gas is promoted in the dew condensation chamber to generate dew water, and the dew water is introduced into the dew passage. To prevent the dew water from accumulating in the introduction path and the exhaust controller and to reduce the area of the combustion gas passages in the introduction path and the exhaust controller, and to prevent combustion in the mixer. The amount of gas is secured to prevent the solubility of carbon dioxide from decreasing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 11 denotes a fuel regulator for adjusting the amount of fuel, 12 denotes a combustion blower for supplying combustion air, 13
Is a burner that mixes fuel and combustion air to burn, 14
Is a heat exchanger for exchanging heat between combustion gas and water, 15 is an exhaust path of the combustion gas after heat exchange, 16 is an introduction path for introducing the combustion gas from the exhaust path 15, and 17 is hot water supply of the heat exchanger 14. A mixer provided in the passage a for dissolving the carbon dioxide gas in the combustion gas into hot water via the introduction passage 16, and an exhaust gas provided in the introduction passage 16 for adjusting the amount of the combustion gas introduced into the mixer 17. A regulator 19 is provided downstream of the mixer 17;
A separator having a liquid level detector 20 for separating hot water in which carbon dioxide gas is dissolved and an undissolved gas, and a separator 21 for separating the undissolved gas from the hot water
A discharge path 22 for discharging the gas from the discharge passage 9 to the exhaust path 15 is provided in the discharge path 21 to control a discharge amount.
Is a dew water chamber provided in the introduction path 16 and stores dew water of the combustion gas, 24 is a dew water path connecting the separator 19 and the dew water chamber 23, and 25 is provided in the dew water path 24 to control the amount of dew water. A condensed water regulator for adjusting, a controller 26 controls the fuel regulator 11 and the combustion blower 12, and a controller for controlling the exhaust regulator 18, the exhaust regulator 22, and the condensed water regulator 25, and 27 is a controller of the controller 26. An operation start and stop switch, 28 is a hot water supply faucet, and 29 is a bathtub.

Next, the operation of the first configuration will be described. When the switch 27 is turned on and the hot water supply faucet 28 is opened, a fuel flow detector (not shown) of the water heater detects the fuel and the combustion blower 1 adjusted by the fuel regulator 11 in accordance with the flow rate.
The combustion air adjusted from 2 is supplied to the burner 13. The combustion gas mixed and burned in the burner 13 exchanges heat with water in the heat exchanger 14 in the heat exchanger 14 and is exhausted from the exhaust path 15. On the other hand, the hot water that has passed through the heat exchanger 14 is sent to the mixer 17. Depending on the flow rate of the hot water passing through the mixer 17
It passes through the exhaust path 15 due to the functioning ejector effect.
The hot gas sent to the mixer 17 is mixed with the hot gas sent to the mixer 17 and the combustion gas adjusted by the exhaust gas regulator 18 from the exhaust path 15 via the introduction path 16, and the carbon dioxide gas in the combustion gas is converted into hot water. Dissolved and other combustion gas becomes undissolved gas,
Sent to In the separator 19, the carbon dioxide gas is separated into the hot water in which the carbon dioxide gas is dissolved and the undissolved gas.
9 detects the liquid level and detects the discharge controller 2
2 is opened, and the pressure in the separator 19 becomes atmospheric pressure.
Therefore, the amount of dissolved carbon dioxide gas sent from the separator 19 is larger than the amount of dissolved carbon dioxide gas discharged from the separator 19, and the level of the dissolved carbon dioxide gas rises. The undissolved gas is discharged to the exhaust path 15 via the discharge path 21.
When the level of the molten metal rises, the liquid level detector 20 detects the level and the discharge adjuster 22 is closed. When closed, the gas pressure rises with the increase in the amount of undissolved gas, and the level of the molten metal drops. The opening and closing of the discharge adjuster 22 is repeated in this manner.

Here, since the condensation water chamber 23 having a surface area larger than the surface area of the introduction path 16 is provided in the introduction path 16, high-temperature combustion gas removes condensation water in the introduction path 16 to the condensation water chamber 23. Even if it occurs, the dew water is stored in the dew water chamber 23. Further, since the area where the combustion gas comes into contact with the dew condensation water chamber 23 is large, the dew condensation of the combustion gas is promoted in the dew condensation water chamber 23 to generate dew water. Accordingly, it is possible to prevent the dew water from staying in the introduction path 16 and the exhaust gas regulator 18 to reduce the combustion gas passage area of the introduction path 16 and the exhaust gas regulator 18, and to prevent the combustion passing through the introduction path 16 and the exhaust gas regulator 18. The amount of gas is secured to prevent the solubility of carbon dioxide from decreasing. Further, by introducing the dew water accumulated in the dew water chamber 23 into the separator 19 via the dew water regulator 25, the degassed carbon dioxide gas in the separator 19 is brought into contact with the dew water in the dew water channel 24. This prevents the solubility of carbon dioxide from decreasing.

According to the configuration of this embodiment, since the dew water of the high-temperature combustion gas is stored in the dew water chamber 23, the dew water stays in the introduction path 16 and the exhaust gas regulator 18 and is condensed.
In addition, it is possible to prevent the area of the combustion gas passage of the exhaust adjuster 8 from being narrowed, to secure the amount of the combustion gas passing through the introduction path 16 and the exhaust adjuster 18, and to prevent the solubility of the carbon dioxide gas from being reduced. is there.

Also, by introducing the dew water accumulated in the dew water chamber 23 into the separator 19 through the dew water regulator 25, even if the separator 19 is degassed, the carbon dioxide gas is condensed.
Thus, it has an effect of preventing re-contact with dew water and preventing the solubility of carbon dioxide gas from decreasing.

[0018]

As described above, the water heater of the present invention has the following features.
Since the dew water chamber is provided in the introduction path, it is possible to prevent the dew water from staying in the introduction path and the exhaust gas regulator and to reduce the area of the combustion gas passage of the introduction path and the exhaust gas regulator. Thus, it is possible to secure the amount of combustion gas passing through and prevent the solubility of carbon dioxide gas from decreasing. In addition, since the dew water accumulated in the dew water chamber is introduced into the separator via the dew water regulator, the degassed carbon dioxide gas in the separator is re-contacted with the dew water in the dew water channel, and the solubility of the carbon dioxide gas is reduced. It can be prevented from lowering.

Further, according to the present invention, since the dew water chamber having a surface area larger than the surface area of the introduction path is provided, dew of the combustion gas is promoted in the dew water chamber to generate dew water. To prevent the combustion gas passage area of the introduction path and the exhaust adjuster from being reduced by staying in the path and the exhaust adjuster,
The amount of combustion gas passing through the introduction path and the exhaust gas regulator is ensured to prevent the solubility of carbon dioxide from decreasing.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a water heater in one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a conventional water heater.

[Explanation of symbols]

 Reference Signs List 14 heat exchanger 15 exhaust path 16 introduction path 17 mixer 18 exhaust adjuster 19 separator 20 liquid level detector 21 discharge path 22 discharge adjuster 24 dew condensation water path 23 dew water chamber 25 dew water adjuster 26 controller

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24H 1/00 602 A61H 33/02

Claims (1)

(57) [Claims] And 1. A supplying combustion air combustion blower, a burner for burning by mixing fuel and combustion air, the combustion gases and the water and the heat exchanger for exchanging heat, the combustion gas after being heat-exchanged exhaust an exhaust passage which is dissolved in hot water and the introduction path, the carbon dioxide in the combustion gas through the <br/> introduction passage provided in the hot water passage in the heat exchanger for introducing the combustion gas from the exhaust passage a mixer provided in the introducing path, to separate an exhaust regulator for regulating the amount of combustion gas to be introduced, the water and undissolved gas dissolved carbon dioxide has a liquid level sensor in the mixer separation vessels and condensation component from the exhaust passage of undissolved gas and discharge passage for discharging the exhaust path from the separator to the introducing path
And it comprises a condensation water chamber which separates the gas components, and the condensation water chamber
A water heater in which the separator is communicated via a dew water channel having a dew water regulator.