JP3123247B2 - Bath 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 the combustion of a hydrocarbon-based fuel and the supply of hot water by heat exchange or the pouring of hot water into a bathtub or the like, and the carbon dioxide gas generated by the combustion. The present invention relates to a bath water heater that dissolves in hot water to produce hot water containing carbonic acid.

[0002]

2. Description of the Related Art Conventionally, there is a bath water heater of this kind as shown in FIG. In the figure, the solid arrow indicates the flow direction of hot water, the broken arrow indicates the flow direction of hot water during reheating, the wavy arrow indicates the flow direction of combustion gas, the dashed line indicates the signal line, and the bath water heater is surrounded by a dashed line. I have.

[0003] A hot water supply side fuel supply passage 2 for feeding fuel to the hot water supply side combustion means 1, a hot water supply side fan 3 for sending combustion air to the hot water supply side combustion means 1, and a hot water supply side connected downstream of the hot water supply side combustion means 1 A combustion chamber 4, a hot water supply side heat exchanger 5 connected to the downstream side of the hot water supply side combustion chamber 4 and exchanging heat between water and combustion gas generated by combustion; and a downstream side of the hot water supply side heat exchanger 5. The hot water supply side exhaust path 6, the water supply path 7 for supplying water to the hot water supply side heat exchanger 5, the hot water supply path 8 for supplying hot water from the hot water supply side heat exchanger 5 to a predetermined location, and the inside of the water supply path 7. A water flow rate detecting means 9 provided in the middle of the water supply path 7 for detecting the flow rate of flowing water, and a water flow rate detection means 9 provided in the middle of the hot water supply side fuel supply path 2 for controlling the flow rate of the fuel flowing in the hot water supply side fuel supply path 2. Hot water supply side fuel adjustment means 1
0, water supply channel 7 for detecting the temperature of water flowing in water supply channel 7
The fuel is sent to the hot water supply temperature detecting means 11 provided in the middle of the hot water supply path 8, the hot water supply temperature detecting means 12 provided in the middle of the hot water supply path 8 for detecting the temperature of the hot water flowing in the hot water supply path 8, and the bath-side combustion means 13. Bath-side fuel supply path 14 branched from hot-water supply-side fuel supply path 2, bath-side fan 15 that sends combustion air to bath-side combustion means 13, and bath-side combustion chamber 16 connected to the downstream side of bath-side combustion means 13 A bath-side heat exchanger 17 connected to the downstream side of the bath-side combustion chamber 16 and exchanging heat between hot water and combustion gas generated by combustion; and a bath connected to the downstream side of the bath-side heat exchanger 17. Side exhaust path 18, return pipe 20 for supplying hot water from bath 19 to bath heat exchanger 17, outgoing pipe 21 for supplying hot water from bath heat exchanger 17 to bath 19, and hot water in return pipe 20. Means 22 for conveying the hot water and the temperature of the hot water passing through the return pipe 20. A water temperature detecting means 23, the return pipe 2
A water level detecting means 24 for detecting a static pressure in the bath 0, and a bath-side fuel adjusting means 25 provided in the middle of the bath-side fuel supply path 14 for controlling a flow rate of fuel flowing in the bath-side fuel supply path 14.
A bypass pouring passage 26 that communicates the hot water supply passage 8 with the return pipe 20, and a pouring control valve 27 provided in the middle of the bypass pouring passage 26 that controls the flow rate of hot water flowing in the bypass pouring passage 26.
A pouring device 28 provided in the middle of a bypass pouring channel 26 downstream of a pouring control valve 27 for performing a delimitation between hot water flowing in the hot water supply passage 8 and hot water flowing in the return pipe 20; Pouring water bypass 2 to prevent backflow of hot water flowing inside
6, a check valve 29 provided on the downstream side of the trimming device 28, setting means 30 for the user to select and set tapping temperature, pouring into the bathtub, reheating, etc., setting means 30, input water temperature detecting means 11, hot water temperature detecting means 12, water flow rate detecting means 9, hot water temperature detecting means 23, water level detecting means 24, take in information and supply hot water supply side fuel adjusting means 10, hot water supply side fan 3, bath side fuel adjusting means 25, bath side It consisted of a fan 15, a pouring control valve 27, and a control means 31 for controlling the transport means 22.

With the above configuration, when the user sets the temperature without selecting the pouring into the bathtub 19 in the setting means 30, the control means 31 controls the pouring so that the hot water does not flow into the bypass pouring passage 26. After closing the valve 27, the water flow detecting means 9
And the hot water supply side fuel adjusting means 1 so as to reach the set temperature based on information from the incoming water temperature detecting means 11 and the hot water temperature detecting means 12.
0, the amount of combustion on the hot water supply side is adjusted, and the hot water supply side fan 3 is controlled to adjust the amount of air for combustion so that optimum combustion can be performed with the adjusted combustion amount. Under the above-described control, the fuel supplied from the hot water supply side fuel supply passage 2 is mixed with the air supplied by the hot water supply side fan 3 by the hot water supply side combustion means 1 and burned, and the flame f enters the hot water supply side combustion chamber 4. To form The high-temperature combustion gas generated by the combustion exchanges heat with the water supplied from the water supply passage 7 in the hot water supply side heat exchanger 5, and the water becomes hot water and exits the hot water supply side heat exchanger 5 via the hot water supply passage 8. It is supplied to a predetermined place. On the other hand, the combustion gas which has completed the heat exchange in the hot water supply side heat exchanger 5 is supplied to the hot water supply side exhaust passage 6.
And was discharged to the outside.

The user sets the bathtub 1 in the setting means 30.
When the pouring into the hot water 9 is selected, after the pouring control valve 27 is opened so that the hot water flows into the bypass pouring passage 26, the water flow detecting means 9, the incoming water temperature detecting means 11 and the outgoing water temperature detecting means 12 Is controlled by controlling the hot water supply side fuel adjusting means 10 so as to reach the set temperature on the basis of the information on the hot water supply side, and the hot water supply side fan 3 is controlled so as to perform optimal combustion with the adjusted combustion amount. The amount of air was adjusted. Under the above-described control, the fuel supplied from the hot water supply side fuel supply passage 2 is mixed with the air supplied by the hot water supply side fan 3 by the hot water supply side combustion means 1 and burned.
A flame f is formed therein. The high-temperature combustion gas generated by the combustion exchanges heat with the water supplied from the water supply passage 7 in the hot water supply side heat exchanger 5, and the water becomes hot water, exits the hot water supply side heat exchanger 5, exits the hot water supply passage 8, and bypasses. It reaches the return pipe 20 via the hot water path 26. On the other hand, the combustion gas that has been subjected to heat exchange in the hot water supply side heat exchanger 5 is discharged to the outside through the hot water supply side exhaust passage 6. The hot water that has entered the return pipe 20 is divided into two directions as indicated by solid arrows and sent to the bath 19. One is returned from the return pipe 20 to the bathtub 19 via the bath-side heat exchanger 17 and the outgoing pipe 21, and the other is sent in a direction in which the return pipe 20 is provided with the conveying means 22, and is poured into the bathtub 19. Control means 3
1 is that when the water level of the hot water poured into the bathtub 19 is measured by the water level detecting means 24 provided in the middle of the return pipe 20 and reaches the water level set in the setting means 30, the hot water supply is started. The fuel supply control means 10 and the hot-water supply fan 3 are stopped to stop the combustion and to close the pouring control valve 27 to stop pouring the water into the bathtub 19.

Further, when the user selects reheating in the setting means 30, the control means 31 activates the transport means 22, and then controls the bath-side fuel adjusting means 25 to adjust the amount of combustion on the bath side. In addition, the bath-side fan 15 is controlled so as to perform optimal combustion with the adjusted combustion amount, and the amount of combustion air is adjusted. Under the control described above, the fuel supplied from the bath-side fuel supply passage 14 is mixed with the air supplied by the bath-side fan 15 and the bath-side combustion means 13.
And the mixture is burned to form a flame f in the bath-side combustion chamber 16. The high-temperature combustion gas generated by the combustion exchanges heat with the hot water supplied from the return pipe 20 in the bath-side heat exchanger 17, and the hot water is heated and becomes hot.
And reaches the bathtub 19 via the going pipe 21. On the other hand, the combustion gas that has been subjected to the heat exchange in the bath-side heat exchanger 17 is discharged to the outside through the bath-side exhaust passage 18. The hot water in the bathtub 19 is returned from the return pipe 20 to the bathtub 19 via the bath-side heat exchanger 17 and the outflow pipe 21 by the transport means 22 as shown by the dashed arrow. When the control means 31 detects that the temperature of the hot water flowing in the return pipe 20 has reached the temperature set by the setting means 30 by the hot water temperature detecting means 23,
The bath-side fuel adjusting means 25 and the bath-side fan 15 are controlled so as to stop and stop combustion.

[0007]

However, in the above-described structure, the hot water supplied to the bathtub 19 has no particular medical effect or the like, and the hot water supplied to the water supply channel 7 or the hot water supply channel 8 does not have a medical effect. When a foreign substance exhibiting an effective effect is mixed, the hot water mixed with the foreign substance flows back into the water supply channel 7 in a state of water cutoff or the like, thereby contaminating the clean water, which is not preferable for sanitation.

The present invention solves the above-mentioned conventional problems. By mixing a combustion gas containing carbon dioxide into hot water and pouring the hot water containing carbon dioxide into a bathtub, the effect of increasing blood flow and the like is obtained. To make hot water that demonstrates the medical effects of water supply, to prevent water pollution by mixing combustion gas into the hot water after cutting off the water supply channel and hot water supply channel, and to ensure the sanitary safety of water supply. It is the purpose of 1.

A second object of the present invention is to improve the dissolving efficiency of carbon dioxide gas and increase the concentration by mixing the hot combustion gas with fine water and mixing it with the hot water. Is to reduce the size and cost of the apparatus.

[0010]

In order to achieve the first object, there is solved a means for the ## first technique hand stage of the water heater of the present invention, a hot water supply-side combustion unit, hot water supply side combustion was connected to the hot water supply side combustion means A hot water supply side heat exchanger connected to the hot water supply side combustion chamber, a hot water supply side exhaust path connected to the hot water supply side heat exchanger, and a hot water supply side fuel supply path for supplying hydrocarbon fuel to the hot water supply side combustion means. A hot water supply fan that supplies combustion air to the hot water supply combustion means, a water supply path that supplies water to the hot water supply heat exchanger, a hot water supply path that supplies hot water from the hot water supply side heat exchanger to a predetermined location, and a bath. Side combustion means, a bath-side combustion chamber connected to the bath-side combustion means, a bath-side heat exchanger connected to the bath-side combustion chamber, a bath-side exhaust path connected to the bath-side heat exchanger, and a bath-side combustion means A bath-side fuel supply path branched from a hot-water supply-side fuel supply path that supplies hydrocarbon fuel to the A bath-side fan that supplies combustion air to the side-side combustion means, a return pipe from a bathtub that supplies hot water to the bath-side heat exchanger, and a return pipe to a bathtub that supplies hot water from the bath-side heat exchanger. A conveying means provided in the middle of the pipe to convey hot water in the return pipe, a bypass pouring path connecting the hot water supply path and the return pipe, and a note provided in the middle of the bypass pouring path to control opening and closing of the bypass pouring path. A hot water control valve, an edge device provided downstream of the hot water supply control valve in the bypass pouring channel, and an edge device for edging hot water in the hot water supply channel and the bypass hot water channel; Combustion gas introduction means for introducing the combustion gas discharged from the side combustion means into the bypass pouring path, and provided on the bypass pouring path downstream of the combustion gas introducing means;
Gas-liquid separation means for separating hot water and combustion gas, a combustion gas introduction path for sending combustion gas from the hot water supply side exhaust path to the combustion gas introduction means, a discharge path for discharging the combustion gas separated from the gas-liquid separation means, It is provided with control means for controlling the side fan, bath side fan, transport means, and pouring control valve.

In order to achieve the second object, a second technical means of the water heater of the present invention comprises a first water heater of the present invention.
The combustion gas introducing means includes a nozzle for ejecting hot water supplied from a bypass pouring channel, a combustion gas retaining chamber for retaining combustion gas supplied from the combustion gas introducing channel, and a hot gas ejected from the nozzle. Thus, a diffuser for sucking the combustion gas in the combustion gas retaining chamber and mixing the hot gas and the combustion gas is provided.

[0012]

According to the present invention, the control means controls the pouring control valve so that the bypass pouring passage communicates with the pouring bath or the like by the first technical means. The water supplied from the water supply channel is heat-exchanged by the heat exchanger to become hot water, and reaches the bypass pouring channel via the hot water channel. After being cut off from the tap water supplied from the water supply passage by the cut-off device in the middle of the bypass pouring passage, it reaches the combustion gas introducing means. On the other hand, the hydrocarbon-based fuel supplied from the fuel supply passage is mixed with the air supplied by the hot water supply side fan in the hot water supply side combustion means and burns in the hot water supply side combustion chamber. The heat generated by the combustion is heat-exchanged in the hot water supply side heat exchanger, and the combustion gas containing the carbon dioxide generated by the combustion is guided from the combustion gas introduction path to the combustion gas introduction means via the hot water supply side exhaust path. . Hot water and combustion gas are mixed in the combustion gas introduction means,
The heat exchange is performed again, and the highly water-soluble carbon dioxide in the combustion gas dissolves into hot water containing carbonic acid. afterwards,
The residual combustion gas not dissolved in the gas-liquid separation means is separated from the hot water in which the carbon dioxide is dissolved, and the residual combustion gas is discharged from the gas-liquid separation means via a discharge path. Hot water containing carbonic acid exits the gas-liquid separation means and enters the return pipe via the bypass pouring channel. The hot water that has entered the return pipe is split into two parts, one of which is poured from the return pipe into a bath tub or the like, and the other is supplied from the return pipe to the bath tub or the like through the bath-side heat exchanger through a bath heat exchanger.

When a negative pressure occurs in the water supply channel due to water cutoff or the like, the water is supplied from the water supply channel by the bordering device, so that the water is prevented from flowing back upstream from the bordering device.

According to a second technical means of the present invention,
Combustion gas introduction means for mixing combustion gas and hot water has a venturi configuration consisting of a nozzle and a diffuser,
Hot water supplied from the bypass pouring channel is jetted from the nozzle at a high speed. In the process in which the hot water spouted at a high speed enters the diffuser, the combustion gas retention chamber becomes negative pressure and the combustion gas supplied into the combustion gas retention chamber by the ejector effect is sucked into the diffuser. In the diffuser, the flow of hot water is turbulent due to its high flow velocity, and the sucked combustion gas is finely torn off and mixed into the hot water in the form of fine bubbles. Since the combustion gas becomes fine bubbles and mixes with the hot water, the contact area with the hot water is significantly increased, and the thermal efficiency can be further improved.
As it comes, the highly water-soluble carbon dioxide in the combustion gas is efficiently dissolved in the hot water.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, the solid arrow indicates the flow direction of hot water, the broken arrow indicates the flow direction of hot water during reheating, the wavy arrow indicates the flow direction of combustion gas, the dashed line indicates the signal line, and the bath water heater is surrounded by a dashed line. I have.

FIG. 1 is an embodiment of the first technical means of the water heater according to the present invention, and is a schematic configuration diagram of a main part cut when a hopper is used as an edge cutting device. FIG. 2 is a schematic configuration diagram of cutting a main part of the hopper.

Reference numeral 32 denotes a mixture of air supplied by a hot water supply side fan 33 for supplying combustion air and fuel whose flow rate has been adjusted by a hot water supply side fuel adjusting means 35 provided in the middle of the hot water supply side fuel supply passage 34, and burns. It is a hot water supply side combustion means. A hot-water supply combustion chamber 36, a hot-water supply heat exchanger 37, and a hot-water supply exhaust path 38 are sequentially provided downstream from the hot-water supply combustion means 32 in the flow direction of the combustion gas. Reference numeral 39 denotes a water supply passage through which water flows, and supplies water from the water supply passage 39 to the hot water supply side heat exchanger 37. In the middle of the water supply channel 39, the water supply channel 3
A water flow rate detecting means 40 for detecting a flow rate of water flowing in the inside 9 and an incoming water temperature detecting means 41 for detecting a temperature of water flowing in the water supply passage 39 are provided. The water supplied from the water supply path 39 is subjected to heat exchange in the hot water supply side heat exchanger 37 to become hot water, and is discharged from the hot water supply side heat exchanger 37 to the hot water supply path 42. The hot water supply path 42 is provided with hot water temperature detection means 43 for detecting the temperature of hot water flowing in the hot water supply path 42. In the middle of the hot water supply side exhaust passage 38, a combustion gas introduction passage 44 is provided branching from the hot water supply side exhaust passage 38 so that a part of the combustion gas flows. Numeral 45 denotes bath-side combustion means, and combustion air is supplied by a bath-side fan 46. The fuel is supplied from a bath side fuel supply path 47 branched from the hot water supply side fuel supply path 34. In the middle of the bath-side fuel supply passage 47, a bath-side fuel adjusting means 48 for adjusting the flow rate of the fuel flowing in the bath-side fuel supply passage 47 is provided. A bath-side combustion chamber 49, a bath-side heat exchanger 50, and a bath-side exhaust passage 51 are sequentially provided downstream from the bath-side combustion unit 45 in the flow direction of the combustion gas. Reference numeral 52 denotes a return pipe that connects the bathtub 53 and the bath-side heat exchanger 50, and a conveyance unit 54 that conveys hot water in the return pipe 52 is provided in the middle of the return pipe 52. Also,
On the bathtub side of the conveying means 54 of the return pipe 52, a hot water temperature detecting means 55 for detecting the temperature of hot water flowing in the return pipe 52 and a water level detecting means 56 for detecting a static pressure in the return pipe 52 are provided. . Reference numeral 57 denotes an outgoing pipe that connects the bath-side heat exchanger 50 and the bathtub 53. The hot water supply path 42 and the return pipe 52 communicate with each other through a bypass pouring path 58, which branches off from the downstream side of the hot water temperature detection means 43 of the hot water supply path 42 and communicates with the transfer means 54 of the return pipe 52. It is continued between the bath-side heat exchangers 50. In the middle of the bypass pouring channel 58, a pouring control valve 59 for controlling the flow rate of hot water flowing in the bypass pouring channel 58 is provided. A hopper 61 is provided in the bypass pouring channel 58 downstream of the pouring control valve 59 as an edging device 60 for edging hot water supplied from the pouring channel 42. The bypass pouring line 58 downstream of the hopper 61 is provided with a combustion gas introducing means 62 for introducing a combustion gas from the hot water supply side exhaust passage 38 via the combustion gas introduction passage 44 and mixing it into the hot water. Introduction means 6
Gas-liquid separating means 6 for separating combustion gas and hot water downstream of
3 is provided, and the gas-liquid separation means 63 of the bypass pouring passage 58 is provided.
A check valve 64 is provided on the downstream side of. The gas-liquid separation means 63 and the hot water supply side exhaust path 38 communicate with each other through a discharge path 65. In the middle of the combustion gas introduction passage 44, an introduction amount adjusting means 66 for adjusting the flow rate of the combustion gas flowing in the combustion gas introduction passage 44 is provided. On the other hand, the gas-liquid separating means 63 is provided with a separator water level detecting means 67 for detecting the water level of the hot water inside the gas-liquid separating means 63, and a discharge path 65 for adjusting the flow rate of the residual combustion gas to be discharged. Amount adjusting means 68
Is provided. Reference numeral 69 denotes a setting means for the user of the apparatus to set the hot water temperature, pouring into the bathtub 53, reheating, and the like.
Reference numeral 70 denotes control means, which includes hot water supply side combustion means 32, hot water supply side fan 33, hot water supply side fuel adjustment means 35, water flow rate detection means 40, incoming water temperature detection means 41, outlet water temperature detection means 43, bath side combustion means 48, Bath-side fan 46, bath-side fuel adjusting means 48, conveying means 54, temperature detecting means 55, water level detecting means 56, pouring control valve 59, introduction amount adjusting means 66, separator water level detecting means 67, discharge amount adjusting means 68 , Setting means 6
9 is connected by wire as shown in the figure.

As shown in FIG. 2, a hopper 61, which is an edge cutting device 60, is provided with a partition plate 73 in a first chamber 71 and a second chamber 72.
, And the first chamber 71 and the second chamber 72 communicate with each other through a communication port 74. An inlet 75 for supplying hot water from the bypass pouring channel 58 is provided above the first chamber 71, and an outlet 76 for returning hot water to the bypass pouring channel 58 is provided on a side surface of the first chamber 71. Below the entrance 75 of the first chamber 71, there is a movable portion 77 movable by hot water supplied from the bypass pouring channel 58, and the movable portion 77 is supported by a spring 78. The second chamber 72 is provided with a discharge port 79 for discharging hot water stored in the second chamber 72 to the outside.

In the above configuration, the user sets the setting means 69.
When the temperature is set without selecting the pouring to the bathtub 53 in the above, the control means 70 closes the pouring control valve 59 so as to prevent the hot water from flowing into the bypass pouring path 58, and then controls the water flow rate detecting means 40. Based on the information from the incoming water temperature detecting means 41 and the outgoing water temperature detecting means 43, the hot water supply side fuel adjusting means 35 is controlled to adjust the combustion amount on the hot water supply side so that the set temperature is attained. The hot water supply fan 33 is controlled so as to perform the adjustment, and the amount of air for combustion is adjusted. Under the control described above, the fuel supplied from the hot water supply side fuel supply passage 34 is mixed with the air supplied by the hot water supply side fan 33 by the hot water supply side combustion means 32 and burns, and the flame f is injected into the hot water supply side combustion chamber 36. Form. The high-temperature combustion gas generated by the combustion exchanges heat with the water supplied from the water supply passage 39 in the hot water supply side heat exchanger 37, and the water becomes hot water and becomes hot water.
7 and is supplied to a predetermined place via a hot water supply path 42.
On the other hand, the combustion gas which has completed the heat exchange in the hot water supply side heat exchanger 37 is discharged to the outside through the hot water supply side exhaust passage 38.

The user sets the bathtub 5 in the setting means 69.
In the case of selecting the pouring into the third pouring, the pouring control valve 59 is controlled so that the hot water flows into the bypass pouring path 58, and the hot gas is introduced from the hot water supply side exhaust path 38 into the combustion gas introducing path 44. In addition to controlling the amount adjusting means 66, the hot water supply side fuel adjusting means 35 is controlled so that the temperature becomes the set temperature based on the information from the water flow rate detecting means 40, the incoming water temperature detecting means 41, and the outgoing water temperature detecting means 43. The amount of combustion is adjusted and the amount of air for combustion is adjusted by controlling the hot water supply side fan 33 so that optimum combustion can be performed with the adjusted amount of combustion. Under the above-described control, the fuel supplied from the hot water supply side fuel supply passage 34 is mixed with the air supplied by the hot water supply side fan 33 by the hot water supply side combustion means 32 to perform combustion.
A flame f is formed therein. The high-temperature combustion gas generated by the combustion exchanges heat with the water supplied from the water supply passage 39 in the hot water supply side heat exchanger 37, and the water becomes hot water and exits the hot water supply side heat exchanger 37 via the hot water supply passage 42. It reaches the bypass pouring channel 58.

A part of the combustion gas after the heat exchange in the hot water supply side heat exchanger 37 is led to the combustion gas introduction means 62 through a combustion gas introduction path 44 branching from the middle of the hot water supply side exhaust path 38. . The flow rate of the combustion gas guided to the combustion gas introduction means 62 is adjusted by an introduction amount adjustment means 66 provided in the combustion gas introduction path 62. On the other hand, the bypass pouring channel 58
The hot water that has entered is cut off by a hopper 61 that is a cutting device 60. That is, the hot water that has entered from the inlet 75 of the hopper 61 pushes down the movable portion 77 by water pressure, and the movable portion 77 closes the communication port 74 provided in the partition plate 73. Since the communication port 74 is closed, the hot water returns to the bypass pouring channel 58 from the outlet 76 via the first chamber 71 again. Water supply channel 3 due to water interruption
When the pressure at 9 becomes negative, the movable portion 77 moves upward by the force of the spring 78 to close the inlet 75 and open the communication port 74. Therefore, the hot water returned from the outlet 76 due to the negative pressure does not flow backward to the upstream side of the hopper 61, but enters the second chamber 72 through the communication port 74 provided in the partition plate 73, and is discharged outside through the discharge port 79. Is done. The hot water cut off in the hopper 61 is supplied to the bypass pouring path 5.
8 is sent to the combustion gas introduction means 62 provided on the downstream side of the hopper 61. In the combustion gas introduction means 62, the highly water-soluble carbon dioxide in the combustion gas is dissolved in the combustion gas supplied from the combustion gas introduction path 44 and the hot water flowing through the bypass pouring path 58, and heat exchange is performed again. . Residual combustion gas, which is the remainder of the combustion gas not dissolved in the hot water, is supplied to a gas-liquid separation unit 6 provided downstream of the combustion gas introduction unit 62.
It is separated from hot water in 3. The separated residual combustion gas enters the discharge passage 65 from the gas-liquid separation unit 63, and is flow-regulated by the discharge amount control unit 68 provided in the middle of the discharge passage 65, and then returns to the hot water supply side exhaust passage 38, and is returned to the hot water supply side exhaust passage. Exhausted to the atmosphere via. The hot water in which the carbon dioxide is dissolved exits the gas-liquid separation means 63 and reaches the return pipe 52 via the bypass pouring channel 58. The hot water that has entered the return pipe 52 is split into two directions as indicated by solid arrows and sent to the bathtub 53. One flows from the return pipe 52 to the bathtub 53 via the bath-side heat exchanger 50 and the outgoing pipe 57, and the other flows into the bathtub 53 by flowing in the direction in which the conveying means 54 of the return pipe 52 is provided.

The control means 70 determines the water level of the hot water poured into the bathtub 53 by the water level detection means 5 provided in the middle of the return pipe 52.
6, when it is detected that the water level has reached the water level set in the setting means 69, the hot water supply side fuel adjusting means 35 and the hot water supply side fan 33 are stopped to stop the combustion, and the pouring control valve 59 is closed so that the bathtub is closed. Control is performed so as to stop pouring of the molten metal into 53. Also, the hot water is prevented from flowing backward from the gas-liquid separating means 63 to the hot water supply side exhaust path 38 via the discharge path 65, and the residual combustion gas retained in the gas-liquid separating means 63 is supplied to the bypass pouring path 5
The discharge amount adjusting means 68 is controlled based on the information obtained by the separator water level detecting means 67 so that the water level in the gas-liquid separating means 63 is prevented from being mixed into the liquid 8.

Further, when the user selects reheating in the setting means 69, the control means 70 operates the transport means 54, and then controls the bath-side fuel adjusting means 48 to adjust the amount of combustion on the bath side. In addition, the bath-side fan 46 is controlled so as to perform optimal combustion with the adjusted combustion amount, and the amount of combustion air is adjusted. Under the above-described control, the fuel supplied from the bath-side fuel supply path 47 is combined with the air supplied by the bath-side fan 46 and the bath-side combustion means 45.
And the mixture is burned to form a flame f in the bath-side combustion chamber 49. The high-temperature combustion gas generated by the combustion exchanges heat with the hot water supplied from the return pipe 52 in the bath-side heat exchanger 50, and the hot water is heated so as to be heated.
And reaches the bathtub 53 via the going pipe 57. On the other hand, the combustion gas that has been subjected to heat exchange in the bath-side heat exchanger 50 is discharged to the outside through the bath-side exhaust path 51. The hot water in the bathtub 53 is returned from the return pipe 52 to the bathtub 53 via the bath-side heat exchanger 50 and the outgoing pipe 57 by the transport means 54 as shown by the dashed arrow. When the control means 70 detects that the temperature of the hot water flowing in the return pipe 52 has reached the temperature set by the setting means 69 by the hot water temperature detecting means 55,
The bath-side fuel adjusting means 48 and the bath-side fan 46 are controlled so as to stop and stop combustion.

[0024] With this configuration, the combustion gas containing carbon dioxide gas is mixed into the hot water to perform heat exchange to increase the thermal efficiency.
In addition, by supplying hot water containing carbonic acid to the bathtub 53, bathing in hot water containing carbonic acid can be performed, and medical effects such as blood flow increasing action can be obtained by bathing, and combustion gas is mixed. The sanitary safety of the water supply can be ensured by eliminating the backflow of hot water and preventing pollution of the water supply.

FIG. 3 shows an embodiment of the second technical means of the bath water heater according to the present invention. The same parts as those of the first technical means are denoted by the same reference numerals, and detailed description thereof will be omitted. Only the differences will be described.

In the first technical means, the combustion gas introducing means 62 comprises a nozzle 80, a nozzle holder 81 holding the nozzle 80, a diffuser 82, and a main body 83 holding the nozzle holder 81 and the diffuser 82. I have. In the nozzle holder 81, a bypass pouring channel 58 is provided on a side opposite to the nozzle mounting portion 84 where the nozzle 80 is mounted.
And a hot water supply inlet 85 for taking in hot water from the bypass pouring channel 58 is provided. The main body 83 is provided with a combustion gas inlet 86 which communicates with the combustion gas introduction passage 44 and takes in combustion gas from the combustion gas introduction passage 44. Nozzle 8
The diffuser 82 and the diffuser 82 are provided on the same central axis, and the opposite side of the nozzle 80 of the diffuser 82 is provided with a hot water supply outlet 87 which communicates with the bypass pouring channel 58 and sends hot water to the bypass pouring channel 58. I have. The main body 83, the nozzle 80, the nozzle holder 81, and the diffuser 82 form a combustion gas retaining chamber 88 in which the combustion gas supplied from the combustion gas introduction passage 44 is retained.

In the above configuration, the hot water supplied from the bypass pouring channel 58 is supplied to the hot water supply inlet 85 of the nozzle holder 81.
Through the nozzle 80 at high speed. On the other hand, the combustion gas is supplied to the combustion gas retention chamber 88 via the combustion gas introduction path 44 and the combustion gas inlet 86 of the main body 83. In the process in which the hot water spouted from the nozzle 80 at a high speed enters the diffuser 82, the combustion gas retention chamber 88 becomes a negative pressure, and the combustion gas in the combustion gas retention chamber 88 is sucked into the diffuser 82 by an ejector effect. In the diffuser 82, the hot water and the combustion gas are mixed and heat exchanged, and at the same time , the highly water-soluble carbon dioxide in the combustion gas is dissolved in the hot water to become hot water containing carbonic acid. The hot water containing carbonic acid and the residual combustion gas remaining without being dissolved are passed from the hot water supply outlet 87 of the diffuser 82 to the bypass pouring passage 5.
Return to 8.

In the diffuser 82, the flow of the hot water is turbulent due to its high flow velocity, and the sucked combustion gas is finely torn off and mixed with the hot water in the form of fine bubbles. Combustion gas is mixed with hot water that has become microbubbles, so the contact area with hot water increases significantly, and the highly water-soluble oxygen dioxide in the combustion gas dissolves in the hot water efficiently, which can increase thermal efficiency.
It is possible to make a high carbonate concentration hot water along with the can.

[0029]

As described above, the water heater of the present invention has the following effects.

According to the first aspect of the present invention, the thermal efficiency is improved by mixing the combustion gas into the bypass pouring channel.
In addition to this, the highly water-soluble carbon dioxide in the combustion gas is dissolved in the hot water, and the hot water containing carbonic acid can be poured into the bathtub automatically. Hot water containing carbonic acid has medical effects such as a warming effect and a warming effect due to a blood flow increasing effect, so that it is possible to supply hot water optimal for bathing.

Also, since the edging device is provided on the upstream side of the combustion gas introducing means for dissolving the combustion gas, the hot water containing carbonic acid does not flow back to the water supply even if the water supply becomes negative pressure due to water cutoff or the like. In addition, the sanitary safety of the water supply can be ensured.

According to the second aspect of the present invention, the combustion gas introduction means having a venturi configuration composed of a nozzle and a diffuser allows the combustion gas to be supplied without power by the ejector effect utilizing the water supply pressure from the water supply. Can be mixed in hot water.

Further, since the combustion gas becomes fine bubbles in the diffuser and the contact area with the hot water is remarkably increased, the dissolving efficiency is increased, the heat efficiency can be improved, and the hot water having a high carbon dioxide concentration can be obtained. The effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a main part cutting of an embodiment when a hopper is used as an edge cutting device in a bath water heater of the present invention.

FIG. 2 is a schematic configuration diagram of cutting a main part of the hopper in the embodiment.

FIG. 3 is a schematic configuration diagram of a main part cut of a combustion gas introduction unit according to another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a main part cut of a water heater in a conventional example.

[Explanation of symbols]

 32 hot water supply side combustion means 33 hot water supply side fan 34 hot water supply side fuel supply path 36 hot water supply side combustion chamber 37 hot water supply side heat exchanger 38 hot water supply side exhaust path 39 water supply path 42 hot water supply path 44 combustion gas introduction path 45 bath side combustion means 46 bath side Fan 49 Bath-side combustion chamber 50 Bath-side heat exchanger 51 Bath-side exhaust path 52 Return pipe 54 Conveying means 57 Outgoing pipe 58 Bypass pouring path 60 Edge cutting device 62 Combustion gas introduction means 63 Gas-liquid separation means 65 Discharge path 70 Control means 80 Nozzle 82 Diffuser 88 Combustion gas retention chamber

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24H 1/00 F23J 11/00 A47K 3/00

Claims (2)

(57) [Claims] 1. A hot water supply side combustion means, a hot water supply-side combustion chamber which is connected to the hot water supply side combustion means, a hot water supply-side heat exchangers connected to the hot water supply side combustion chamber, hot water was connected to the hot water supply-side heat exchanger Side exhaust path, a hot water supply side fuel supply path for supplying hydrocarbon-based fuel to the hot water supply side combustion means, a hot water supply side fan for supplying combustion air to the hot water supply side combustion means, and a hot water supply side heat exchanger. A water supply path for supplying water, a water supply path for supplying hot water from the hot water supply side heat exchanger to a predetermined location , a bath-side combustion unit,
A bath-side combustion chamber connected to the bath-side combustion means, a bath-side heat exchanger connected to the bath-side combustion chamber, a bath-side exhaust path connected to the bath-side heat exchanger, and the bath-side combustion means. A bath-side fuel supply passage branched from a hot-water supply-side fuel supply passage for supplying hydrocarbon fuel, a bath-side fan for supplying combustion air to the bath-side combustion means, and a supply of hot water to the bath-side heat exchanger Return pipe, a feed pipe for supplying hot water from the bath-side heat exchanger, a transfer means provided in the middle of the return pipe, for transferring hot water in the return pipe, and connecting the hot water supply path and the return pipe. A bypass pouring channel, a pouring control valve provided in the middle of the bypass pouring channel, for controlling opening and closing of the bypass pouring channel, and a pouring control valve provided downstream of the pouring control valve of the bypass pouring channel. Bordering device for bordering hot water in hot water supply channel and bypass pouring channel A combustion gas introducing means provided downstream of the edge pouring device of the bypass pouring channel to introduce combustion gas discharged from the hot water supply-side combustion device into the bypass pouring channel; and the combustion of the bypass pouring channel. A gas-liquid separation unit provided downstream of the gas introduction unit for separating hot water and combustion gas, a combustion gas introduction passage for sending combustion gas from the hot water supply side exhaust passage to the combustion gas introduction unit, and a separation from the gas-liquid separation unit A bath water heater comprising a discharge path for discharging the burned combustion gas, and control means for controlling the hot water supply side fan, the bath side fan, the conveying means, and the pouring control valve. 2. The combustion gas introduction means includes a nozzle for ejecting hot water supplied from a bypass pouring passage, a combustion gas retention chamber in which combustion gas supplied from the combustion gas introduction passage stays, and a combustion gas ejected from the nozzle. 2. The bath water heater according to claim 1, further comprising a diffuser for sucking the combustion gas in the combustion gas retaining chamber with the hot water and mixing the hot gas and the combustion gas.