JP3238226B2 - Carbonated 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 hot water supply burner for heating a hot water supply heat exchanger supplied in a water supply passage, and a fuel for adjusting an output of the hot water supply burner by adjusting a fuel supply amount of the hot water supply burner. Supply amount adjusting means, a gas-liquid contact portion through which the exhaust of the hot water supply burner passes, a hot water supply path for supplying hot water from the hot water supply heat exchanger to the supplied portion, and hot water from the hot water supply heat exchanger; Or, a guide path for exhaust contact that guides water from the water supply path to the gas-liquid contact section as the liquid for exhaust contact, and hot water that has passed through the gas-liquid contact section and water from the water supply path, or the gas-liquid contact. The present invention relates to a carbonated hot water supply apparatus provided with a pouring path for guiding water passing through a section and hot water from the hot water supply path to a supplied section.

[0002] Here, the gas-liquid contact portion refers to a gas contained in the exhaust gas of the hot water supply burner by bringing water or hot water supplied to the supplied portion into contact with the exhaust gas of the hot water supply burner as an exhaust contact liquid. It is a device for dissolving carbon (carbon dioxide gas) in the exhaust contact liquid. If water or hot water that has passed through the gas-liquid contact part is supplied as a part to be supplied, for example, to a bathtub or the like,
It can be a carbonated bath.

[0003] Further, since the gas-liquid contact portion is configured so that the exhaust gas from the hot water supply burner passes through, the inside of the gas-liquid contact portion is open to the atmosphere. Therefore, the pouring channel that guides the hot water or the water that has passed through the gas-liquid contact portion to the supply target portion drops hot and cold water into the supply target portion due to a head difference between the gas-liquid contact portion and the supply target portion provided for construction. It is configured as follows.

[0004]

2. Description of the Related Art Conventionally, in this type of carbonated water heater, the amount of water supplied to a heat exchanger for supplying hot water or the amount of water supplied to a gas-liquid contact portion is determined.
Alternatively, flow rate adjusting means for adjusting the flow rate of the pouring water path by adjusting the amount of water supplied from the water supply path is provided, and the hot water supply control means sets the upper limit of the tapping temperature of the hot water supply heat exchanger based on the detected water supply temperature. Calculating a target flow rate at which the fuel supply amount is maintained at or below the maximum value and controlling the fuel supply amount adjusting means and the flow rate adjusting means, and adjusting the flow rate so that the set target hot water supply temperature is maintained. (E.g., Japanese Patent Application No. 4-31523, which was previously filed).
No.).

With the above-described control, the temperature of hot water to be supplied to the portion to be supplied can be maintained at the set target hot water temperature in the direction in which the amount of water to be supplied to the gas-liquid contact portion is increased as much as possible. When performing carbon dioxide hot water supply, the carbon dioxide concentration can be increased as much as possible.

[0006]

However, according to the above prior art, the higher the temperature of water supplied to the heat exchanger for supplying hot water, the greater the amount of hot water supplied to the hot water supply path.
Accordingly, the amount of water supplied to the gas-liquid contact portion also increases, and as a result, the amount of hot water supplied to the pouring channel increases. On the other hand, since the pouring channel is configured to drop hot water into the supply destination, the flow rate of the pouring channel is limited. Therefore, when the supply water temperature is high, the amount of hot water supplied to the pouring channel exceeds the limit water amount of the pouring channel,
Hot water accumulates in the gas-liquid contact portion, and the hot water overflows into the combustion chamber and the exhaust port of the hot water supply burner, causing an inconvenience in the hot water supply device.

An object of the present invention is to eliminate the above-mentioned conventional disadvantages.

[0008]

According to a first characteristic configuration of the carbonated hot water supply apparatus according to the present invention, hot water supply amount adjusting means for adjusting the amount of hot water supplied to the supply destination is provided in the hot water supply path or the water supply path. A water supply amount adjusting means for adjusting an amount of water supplied to the supplied part, provided on the guide path, and controlling the fuel supply amount adjusting means, the hot water supply amount adjusting means, and the water supply amount adjusting means; The control means sets an allowable maximum hot water supply amount to the supplied portion, obtains a required output of the hot water supply burner from the allowable maximum hot water supply amount, a set target hot water supply temperature, and a detected water supply temperature of the water supply passage. Adjusting the water supply amount adjusting means based on the required output; adjusting the hot water supply amount adjusting means so that the tapping temperature of the hot water supply heat exchanger reaches a set upper limit temperature; The hot water supply temperature to the supply In that it is configured to adjust so that the hot water temperature.

A second characteristic configuration of the carbonated hot water supply apparatus according to the present invention specifies a preferred specific configuration when implementing the first characteristic configuration, and the hot water supply control means determines that the required output is the same as that of the hot water supply burner. If the output exceeds the set upper limit output, the fuel supply amount adjusting means is configured to adjust based on the set upper limit output.

[0010]

According to the first characteristic configuration of the present invention, the fuel supply amount adjusting means, the hot water supply amount adjusting means, and the water supply amount adjusting means include:
Since the control is performed based on the maximum allowable hot water supply amount to the supply destination, the amount of hot water supplied to the pouring channel does not exceed the limit of the flow rate of the pouring channel.

According to the second characteristic configuration, when the required output exceeds the set upper limit output of the hot water supply burner, the fuel supply amount adjusting means is adjusted based on the set upper limit output. Normally, carbon dioxide hot water is supplied at the maximum allowable hot water supply amount, and only when the required output exceeds the set upper limit output of the hot water supply burner due to a decrease in the supply water temperature, the hot water supply amount is reduced in accordance with the set upper limit output to perform the carbonated hot water supply. be able to.

[0012]

According to the first characteristic configuration of the present invention, since the amount of hot water supplied to the pouring channel does not exceed the limit water amount, the combustion chamber and the exhaust port of the hot water supply burner are connected from the gas-liquid contact portion. Hot water can overflow, and an inconvenience of causing an accident of the hot water supply device can be provided.

[0013] According to the second characteristic configuration, normally, carbonic water is supplied at the maximum allowable hot water supply amount, and only when the required output exceeds the set upper limit output of the hot water supply burner due to a decrease in the supply water temperature, is set in accordance with the set upper limit output. Since the carbonated water supply can be performed by reducing the amount of hot water supply, the carbonated water supply can be performed at a water supply amount as close as possible to the maximum allowable hot water supply amount, while always performing the carbonated water supply at the set target hot water supply temperature. It is possible to provide a carbonated water heater capable of quickly supplying hot water to the section.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a carbonated hot water supply apparatus for supplying water or hot water to a bathtub B as a supply destination and a general hot water tap K. The carbonic water heater supplies hot water to the bathtub B and the general hot water tap K by heating tap water supplied through the water supply channel W1, and a reheating unit C for reheating the bathtub water in the bathtub B. A gas-liquid contact portion G for bringing water or hot water into contact with the exhaust of the hot water supply burner 2, a water pool portion F for water-sealing a path from the gas-liquid contact portion G to the bathtub B, and controlling the operation of the carbonic water heater. And a control unit H.

The hot water supply section A is provided with a hot water supply heat exchanger 1 for supplying tap water through a water supply passage W1, a hot water supply burner 2 for heating the hot water supply heat exchanger 1, and a combustion air of the hot water supply burner 2. A blower fan 3 for blowing air is provided. The hot water supply heat exchanger 1 has a hot water supply path W2 for supplying heated hot water to the bathtub B.
And a general hot water supply path W6 for supplying to the general hot water tap K. The hot water supply burner 2 is provided with a fuel control valve 4 for adjusting the fuel supply amount Gas to the hot water supply burner 2 and a fuel intermittent valve 5. The rotation speed of the blower fan 3 is controlled to a value uniquely determined according to the fuel supply amount Gas so that the blower amount is such that the combustion state of the hot water supply burner 2 is optimized.

The reheating section C includes a reheating heat exchanger 6 provided in a circulation path W5 for circulating bath water in the bathtub B, a reheating burner 7 for heating the reheating heat exchanger 6, and a reheating burner 7. And a blower fan 8 for blowing the combustion air of the firing burner 7.
A circulation pump 9 is provided in the circulation path W5. The reburning burner 7 is provided with a fuel control valve 10 for adjusting a fuel supply amount to the reburning burner 7 and a fuel intermittent valve 11. The blower fan 8 is controlled in the same manner as the blower fan 3 according to the reburning burner 7.

An exhaust duct 12 of the hot water supply unit A is connected to the gas-liquid contact portion G so that the exhaust gas of the hot water supply burner 2 passes therethrough. Hot water supply channel W2 leading to contact portion G, water supply channel W8 leading water from water supply channel W7 to gas-liquid contact portion G, and exhaust contact leading water from water supply channel W7 to gas-liquid contact portion G as exhaust contact liquid. And a connecting pipe 22 that forms a path from the gas-liquid contact part G to the water pool part F is connected to relay a path for supplying hot and cold water to the bathtub B. Have been.

The water pool F guides the hot water from the hot water supply path W2, the hot water or hot water from the guide path W3, and the water from the water supply path W8 that has passed through the connecting pipe 22 and the gas-liquid contact part G to the bathtub B. The hot water supply path W4 is connected to relay a path for supplying hot and cold water from the gas-liquid contact portion G to the bathtub B.

Next, the hot water supply or the water supply path in the present carbonic water heater will be described.

In the present carbonic water heater, first, the water supply passage W1
, Hot water supply heat exchanger 1, hot water supply path W2, gas-liquid contact portion G
, The connecting pipe 22, the water pool F, and the pouring path W4 constitute a hot water supply path for supplying the hot water boiled by the hot water supply burner 2 to the bathtub B as it is.

In the water supply passage W1, a thermistor S1 for detecting the water supply temperature Ti, a water amount sensor S2 for detecting the total water supply amount Q1, and a water amount sensor S4 for detecting the water supply amount Q2 to the hot water supply heat exchanger 1. And a hot water supply adjusting valve 13 as hot water supply adjusting means for adjusting the amount of hot water supplied to the bathtub B.

The hot water supply path W2 is provided with a thermistor S5 for detecting the tapping temperature To of the hot water supply heat exchanger 1, and an interrupting valve 25 for interrupting the hot water supply path W2. The connecting pipe 22 is provided with a water flow drive valve 23 and a thermistor S3 for detecting the actual hot water supply temperature Tx for the bathtub B.

Further, the present carbonic water heater has a water supply passage W7,
The water supply path W8, the gas-liquid contact portion G, the connecting pipe 22, the water reservoir F, and the pouring path W4 constitute a water supply path that supplies the water from the water supply path W7 to the bathtub B as it is. ing.

The water supply passage W7 is provided with a water supply amount adjustment valve 14 as a water supply amount adjustment means for adjusting the amount of water supplied to the bathtub B. On the downstream side, a water supply passage W8 and a guide described later are provided so as to branch off. The road W3 is connected. An intermittent valve 29 is provided in the water supply passage W8, and is configured to intermittently supply water to the bathtub B.

The hot water supply path and the water supply path merge at the gas-liquid contact portion G so that hot water and water are supplied to the bathtub B. Therefore, by supplying hot water and water simultaneously from the hot water supply path and the water supply path, hot water supply to the bathtub B can be performed, and the hot water supply amount adjustment valve 13 and the water supply amount adjustment valve 14 are adjusted. Thus, the hot water supply temperature Tx at the time of hot water supply can be adjusted.

Further, the present carbonic water heater has a water supply passage W7,
The gas from the gas-liquid contact part G is used as the exhaust contact liquid using the water from the water supply passage W7.
, A gas-liquid contact portion G, a communication pipe 22, a water pool portion F, and a pouring channel W4.
When passing through the gas-liquid contact portion G, a carbon dioxide hot water supply path is configured to supply water containing carbon dioxide (carbon dioxide gas) contained in the exhaust gas of the hot water supply burner 2 to the bathtub B.

The gas-liquid contact portion G is provided with a jet nozzle 16 for jetting the exhaust contact liquid from the guide path W3 in a shower shape, and makes the exhaust contact liquid and the exhaust of the hot water supply burner 2 sufficiently contact. By doing so, the carbon dioxide is dissolved, and the exhaust gas contained in the exhaust gas of the hot water supply burner 2 can be recovered by heating the exhaust contact liquid with high-temperature exhaust gas.

The guide path W3 is provided with an intermittent valve 28 so that the supply of the exhaust contact liquid to the gas-liquid contact portion G is intermittent. Further, since the guide path W3 is connected to guide the water from the water supply path W7 to the gas-liquid contact portion G, the water supply amount adjustment valve 14 provided in the above-described water supply path W7 can be used even in the carbonated hot water supply path. , The amount of water supplied to the bathtub B can be adjusted.

Therefore, by simultaneously supplying hot water and water from the hot water supply path and the carbonic acid hot water supply path, carbonic water can be supplied to the bathtub B, and the hot water supply amount adjustment valve 13 and the water supply amount adjustment valve 14 are connected. By adjusting the temperature, the temperature of the hot water supply temperature Tx at the time of carbonic acid hot water supply can be adjusted.

The carbonated hot water supply apparatus is provided with a general hot water supply path W6 for guiding hot water from the hot water supply heat exchanger 1 to a general hot water tap K so as to branch off from the hot water supply path W2. The hot water supplied to the general hot water tap K,
A general hot water supply path is configured. In general hot water supply channel W6,
Check valve 26 and water supply channel W1 guided by water supply channel W9
Mixing valve 2 for mixing the water from the water into the general hot water supply path W6
7, a water amount sensor S6 for detecting the opening of the general hot water tap K
And a thermistor S7 for detecting the hot water supply temperature Tk of the general hot water tap K. Therefore, the general hot water supply can be performed by opening the general hot water tap K, and the hot water supply temperature Tk to the general hot water tap K can be adjusted by adjusting the hot water mixing valve 27. .

The control unit H is mainly composed of a microcomputer, and includes thermistors S1, S3, S5, S
7 and the water amount sensors S2, S4, S6 are connected, and the detection information of these sensors is input, and the fuel control valves 4, 10, the fuel intermittent valves 5, 11, the blowing fans 3, 8, the circulation pump 9 , Hot water supply adjustment valve 13,
Water supply amount adjustment valve 14, intermittent valves 25, 28, 29,
The water flow drive valve 23 and the controller 15 are connected, and thus, a hot water supply control means 101 for controlling the hot water supply amount adjustment valve 13, the water supply amount adjustment valve 14, and the fuel supply amount adjustment means 4 and 5 is configured. .

The controller 15 includes a hot water supply switch 15a, a carbonated water supply switch 15b, and a target hot water supply temperature T.
target hot water supply temperature setting switch 15c for setting bs, and
An additional hot water supply switch 15d and the like are provided.

FIG. 2 shows a gas-liquid contact portion G and a water pool portion F in the present carbonic water heater. Gas-liquid contact part G
In a metal casing, an ejection nozzle 16 for ejecting the exhaust contact liquid supplied from the guide path W3 downward and a filling layer 17 in which a stainless wire is braided in a three-dimensional lattice are provided. An exhaust inlet 12a for connecting the exhaust duct 12 from the hot water supply unit A is provided above the filling layer 17, and an exhaust outlet 18 for discharging the exhaust gas is located below the filling layer 17. It is provided to be.

Therefore, the gas-liquid contact portion G is provided with the hot water supply burner 2.
High-temperature exhaust gas is introduced into the casing from an exhaust inlet 12a, and the exhaust gas passes through the packed bed 17 as it descends toward the exhaust outlet 18, heating the packed bed 17 to a high temperature and ejecting it. The exhaust contact liquid ejected downward from the nozzle 16 is brought into contact with the exhaust contact liquid to dissolve the carbon dioxide in the exhaust into the exhaust contact liquid and to recover the exhaust heat.

A temperature sensor S8 for detecting the temperature of the gas-liquid contact portion G is provided near the filling layer 17 in the casing. The temperature sensor S8 is also connected to the control unit H.

The lower part of the gas-liquid contact portion G collects the exhaust contact liquid ejected from the ejection nozzle 16, the hot water supplied from the hot water supply passage W2, and the water supplied from the water supply passage W8 to form a connecting pipe. 22. A water flow drive valve 23 is provided at a connection portion with the communication pipe 22.

When the water flow drive valve 23 is supplied with water from the jet nozzle 16 and hot water from the hot water supply channel W2, or water from the hot water supply channel W8 and hot water from the hot water supply channel W2,
The flowing pressure of the hot water falling on the valve body 23a
a is depressed to open a path portion from the gas-liquid contact portion G to the water pool portion F, and the valve body 23a
When the hot water does not fall on the top, the spring 23
b pushes up the valve body 23a, and the gas-liquid contact portion G
It is configured such that a path portion from to the water pool F is closed.

The thermistor S3 is provided so as to be located downstream of the water flow drive valve 23 in the communication pipe 22.

In the water pool F, a pouring channel W4 is connected to the bottom of the casing, and a water outlet 19 for the pouring channel W4 is provided at a position higher than the bottom of the casing. Is configured such that water or hot water is stored in a casing, and a water sealing plate 20 is used to discharge water 19 in the casing when water or hot water is stored.
Are separated from each other, so that the path portion from the gas-liquid contact portion G to the bathtub B in the carbonated hot water supply path is water-sealed.

An overflow 21 is provided above the casing of the water pool F. Overflow 2
1 is provided at a position lower than the position where the exhaust outlet 18 is connected at the gas-liquid contact portion G.

The pouring passage W4 is configured to drop hot water by the head between the gas-liquid contact portion G and the bathtub B. The pouring path W4 of this embodiment supplies hot water about 24 l / mi per minute.
It is configured to drop into the bathtub B at a speed of n.

In a portion of the cylindrical body forming the water outlet 19 located near the bottom of the casing, there is provided a fine hole 24 for discharging water or hot water stored in the water storage portion F. The pore 24 of the present embodiment is formed of a hole having a diameter of 4 mm.
Therefore, when the hot water is supplied to the bathtub B, the water pool F receives the hot water from the jet nozzle 16, the hot water supply passage W2, or the hot water supply passage W8 while the water or the hot water is stored and the water sealing state is formed. Is no longer supplied, the water flow drive valve 23
As the is closed, water or hot water is gradually discharged from the fine holes 24 so that water or hot water is not accumulated.

The hot water supply control means 101 is configured to execute the following four types of hot water supply modes. In the first hot water supply mode, a bathtub B is provided by the hot water supply path and the water supply path.
Hot water supply mode in which hot water is supplied to hot water. The second hot water supply mode is a carbonated hot water supply mode in which hot water is supplied to the bathtub B by the hot water supply path and the carbonic acid hot water supply path. The third hot water supply mode is a general hot water supply mode in which hot water from the hot water supply heat exchanger 1 is supplied only to the general hot water tap K. The fourth hot water supply mode is an additional heating water supply mode by the additional heating unit C.

In this embodiment, there is no hot water supply mode in which hot water is supplied to the bathtub B and hot water is supplied to the general hot water tap K at the same time, and a hot water supply mode or a carbonated hot water supply mode is executed. When the general hot water tap K is opened in the middle, the hot water supply mode or the carbonated hot water mode is stopped, and the general hot water mode is executed. When the execution of the hot water supply mode or the carbonated hot water supply mode is requested, the execution of the hot water supply mode or the carbonated hot water supply mode is not started until the general hot water supply mode ends.

The hot water supply mode will be described. The hot water supply mode is executed by operating the hot water supply switch 15a of the controller 15. Hot water switch 1
5a is operated, before the hot water supply burner 2 is ignited,
First, the intermittent valve 25 or the intermittent valve 29 is opened,
Water is injected into the water pool F for a predetermined time. By the water injection for the predetermined time, a water-sealed state in the water pool F is formed. Next, the blower fan 3 is driven, the hot water supply burner 2 is ignited, and hot water supply by the hot water supply path and the water supply path is started.

The hot water supply control means 101 performs the following control. First, as shown in Equation 1, the allowable maximum hot water supply amount Qmax to the bathtub B is set, and the required output of the hot water supply burner 2 is determined from the allowable maximum hot water supply amount Qmax, the set target hot water supply temperature Tbs, and the detected water supply temperature Ti of the thermistor S1. Find Jn. In this embodiment, the allowable maximum hot water supply amount Qmax is set to 24 l / min. Then, the required output Jn is compared with the set upper limit output 600 kcal / min of the hot water supply burner 2, and the smaller one is set as the hot water supply output Jo.

[0047]

Jn = (Tbs−Ti) · Qmax (kcal / min) where Qmax = 24 (l / min) Jo = Jn (Jn <600) (kcal / min) = 600 (Jn> 600) (kcal / Min)

Next, as shown in Equation 2, the hot water supply heat exchanger flow rate Qex is calculated based on the hot water supply output Jo, the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1, and the detected supply water temperature Ti. Then, the hot water supply adjusting valve 13 is adjusted so that the detected water supply amount Q2 of the water amount sensor S4 is equal to the hot water supply heat exchanger flow amount Qex.
Adjust In the present carbonic water heater, the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1 is 80 to 93 ° C.

[0049]

Qex = Jo / (Tex−Ti) (l / min) Qex ← Q2 where Tex = 80 to 93 (° C.)

Next, as shown in Expression 3, the required total water supply amount Qw is calculated from the hot water supply output Jo, the set target hot water supply temperature Tbs, and the detected water supply temperature Ti of the thermistor S1, and the detected total water supply amount of the water amount sensor S2 is calculated. The water supply amount adjustment valve 14 is adjusted so that Q1 becomes the required total water supply amount Qw. As a result, the amount of water supply required to adjust the hot water supply temperature Tx to the bathtub B to the set target hot water supply temperature Tbs is adjusted.

[0051]

## EQU3 ## Qw = Jo / (Tbs-Ti) (l / min) Qw ← Q1

Next, according to equation 4, the total water supply amount Q1 detected by the water amount sensor S2 and the water supply temperature T detected by the thermistor S1 are determined.
i and the set target hot water supply temperature Tbs, the fuel supply amount Gas required to obtain the hot water supply output is obtained, the feed-forward control of the fuel supply amount adjustment valve 4 is performed, and based on the detected temperature Tx of the thermistor S3, Feedback correction control is performed so as to maintain the detected hot water supply temperature Tx at the set target hot water supply temperature Tbs. The rotation speed of the blower fan 3 is controlled based on the fuel supply amount Gas.

[0053]

## EQU4 ## Gas = C1 · (Tbs−Ti) · Q1 + C2 · (Tbs−Tx) (kcal / min) where Tex = 80 to 93 (° C.) C1 and C2 are control coefficients.

Next, the carbonated hot water supply mode will be described.
The carbonated water supply mode is executed by operating the carbonated water supply switch 15b. When the carbonated water supply switch 15b is operated, before the hot water supply burner 2 is ignited, first, the intermittent valve 25 is opened to inject water into the water pool F for a predetermined time, and at the same time, the gas sensor detects the gas-liquid contact by the temperature sensor S8. The temperature of the portion G is checked, and if the temperature is higher than the predetermined temperature, the gas-liquid contact portion G is cooled by driving the blower fan 3. In a state where the gas-liquid contact portion G is overheated to a predetermined temperature or more, the jet nozzle 1
This is because, when water is ejected from the nozzle 6, an abnormal noise such as a swarf is generated, the water evaporates violently, and a large amount of water vapor is discharged from the exhaust port 18 and the like, which is not preferable for use of the carbonated water heater. Next, after a lapse of a predetermined time, if the temperature of the gas-liquid contact portion G is equal to or lower than the predetermined temperature, the intermittent valve 25 and the intermittent valve 28 are opened, and the hot water supply burner 2 is ignited.
Carbonated water supply by the hot water supply path and the carbonated water supply path is started.

The hot water supply control means 101 performs the following control. First, as shown in Equation 5, the allowable maximum hot water supply amount Qmax to the bathtub B is set, and the required output of the hot water supply burner 2 is calculated from the allowable maximum hot water supply amount Qmax, the set target hot water supply temperature Tbs, and the detected water supply temperature Ti of the thermistor S1. Find Jn. In this embodiment, the allowable maximum hot water supply amount Qmax is set to 24 l / min. Then, the required output Jn is compared with the set upper limit output 750 kcal / min of the hot water supply burner 2, and the smaller one is set as the hot water supply output Jo.

[0056]

Jn = (Tbs−Ti) · Qmax (kcal / min) where Qmax = 24 (l / min) Jo = Jn (Jn <750) (kcal / min) = 750 (Jn> 750) (kcal / Min)

Next, based on the hot water supply output Jo obtained by Equation 5, the hot water supply adjusting valve 13 and the hot water supply adjusting valve 1
4. The control of the fuel supply amount adjusting valve 4 and the blower fan 3 is performed in the same control mode as in the hot water supply mode.

Next, the general hot water supply mode will be described.
The general hot water supply mode is executed at any time when the hot water supply and the carbonated hot water supply are not performed and the opening of the general hot water tap K is detected by the water amount sensor S6. When the general hot water tap K is opened, the hot water control means 1
01 performs the following control. First, based on the detected tapping temperature To of the thermistor S5, the fuel supply amount Gas is adjusted so that the tapping temperature To of the hot water supply heat exchanger 1 is maintained at the set target temperature Tex. Performs feedback control. At this time, the set target temperature Tex
Is 75 ° C. The rotation speed of the blower fan 3 is controlled based on the fuel supply amount Gas. Next, based on the detected hot water supply temperature Tk of the thermistor S7, the hot water mixing valve 27 is adjusted such that the hot water supply temperature Tk of the general hot water tap K becomes a desired set target temperature.

The additional heating water supply mode is the additional heating water supply switch 15.
It is executed with the operation of d. Additional heating hot water switch 15d
Is operated, the circulating pump 9 is operated, the blower fan 8 is driven, the reburning burner 7 is ignited, and reburning hot water is supplied. In addition, the combustion amount of the reburning burner 7 is controlled to a constant strength with relatively high thermal power.

[Alternative Embodiment] In the above-described embodiment, the water from the water supply passage W7 is guided to the gas-liquid contact portion G by the guide passage W3, and the water passing through the gas-liquid contact portion G and the water from the hot water supply passage W2. Although hot water was mixed and hot water was supplied to the bathtub B, the jet nozzle 16 was attached to the hot water supply passage W2, and the hot water from the hot water supply passage W2 was used as a gas for exhaust contact as a gas-liquid contact portion G. And the hot water that has passed through the gas-liquid contact portion G and the water from the water supply passage W7 may be mixed to supply carbonic hot water to the bathtub B, or the jet nozzle 16 may be provided in both hot and cold paths. May be provided.

The water supply amount adjusting valve 14 detects the detected hot water supply temperature T.
Based on x, feedback control may be performed such that hot water supply temperature Tx becomes set target hot water supply temperature Tbs.

The fuel supply amount adjusting valve 4 may be feedback-controlled based on the tapping temperature To of the hot water supply heat exchanger 1 so that the tapping temperature To reaches the set target temperature Tex.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing the overall configuration of a carbonic water heater.

FIG. 2 is a sectional view showing a configuration of a gas-liquid contact portion.

[Explanation of symbols]

 B Supply part G Gas-liquid contact part Gas Fuel supply amount Jn Required output Qmax Allowable maximum hot water supply Q2 Supply hot water Tbs Set target hot water supply temperature Tex Set target temperature Ti Detection water supply temperature To Outlet water temperature Tx Hot water supply temperature W1 Water supply path W2 Water supply path W3 Guide path W4 Pouring path W7 Water supply path 1 Hot water supply heat exchanger 2 Hot water supply burner 4 Fuel supply amount adjustment means 5 Fuel supply amount adjustment means 13 Hot water supply amount adjustment means 14 Water supply amount adjustment means 101 Hot water supply control means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-159804 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (2)

(57) [Claims] 1. A hot water supply burner (2) for heating a hot water supply heat exchanger (1) supplied in a water supply passage (W1), and a fuel supply amount (Gas) of the hot water supply burner (2) is adjusted. Fuel supply amount adjusting means (4, 5) for adjusting the output of the hot water supply burner (2), a gas-liquid contact portion (G) through which the exhaust of the hot water supply burner (2) passes, and the hot water supply heat exchanger ( A hot water supply path (W2) for supplying the hot water from the hot water supply 1) to the supply target portion (B), and hot water from the hot water supply heat exchanger (1) or a hot water supply path (W
7) a guide path (W3) for contacting the exhaust gas with the gas from the gas-liquid contact section (G) as the liquid for exhaust contact to the gas-liquid contact section (G); Provided with a pouring passage (W4) for introducing water from the water or the water passing through the gas-liquid contact portion (G) and the hot water from the hot water supply passage (W2) to the supplied portion (B). A hot water supply apparatus, wherein a hot water supply amount adjusting means (13) for adjusting a hot water supply amount (Q2) to the supplied portion (B) is provided in the hot water supply path (W2) or the water supply path (W1); Water supply amount adjusting means (14) for adjusting the amount of water supplied to the supplied portion (B) is provided in the guide path (W3), the fuel supply amount adjusting means (4, 5), and the hot water amount adjusting means. (13) and the hot water supply control means (101) for controlling the water supply amount adjusting means (14) are provided with the permission to the supplied part (B). Sets the maximum hot water supply amount (Qmax), the allowable maximum hot water supply amount (Qmax) and the set target hot-water supply temperature (T
bs) and the detected water supply temperature (Ti) of the water supply channel (W1), the required output (Jn) of the hot water supply burner (2) is obtained. Jn), and adjusting the hot water supply amount adjusting means (13) so that the tapping temperature (To) of the hot water supply heat exchanger (1) becomes a set upper limit temperature (Tex). A carbon dioxide water heater configured to adjust the adjusting means (14) so that the hot water temperature (Tx) to the part to be supplied (B) becomes the set target hot water temperature (Tbs). 2. When the required output (Jn) exceeds the set upper limit output of the hot water supply burner (2), the hot water supply control means (101) sets the fuel supply amount adjusting means (4, 5) to the setting. The carbonic water heater according to claim 1, wherein the device is configured to adjust based on the upper limit output.