JP3238224B2 - Carbonated water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hot water supply path for supplying hot water from a hot water supply heat exchanger supplied in a water supply path to a supply destination and a general hot water supply path for supplying a general hot water tap. Fuel supply amount adjusting means for adjusting the amount of fuel supplied to the hot water supply burner for heating the hot water supply heat exchanger, a gas-liquid contact portion through which the exhaust of the hot water supply burner passes, 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 an exhaust contact liquid, hot water that has passed through the gas-liquid contact section and water from the water supply path, or the gas The present invention relates to a carbon dioxide hot water supply device provided with a pouring passage for guiding water passing through a liquid contact portion and hot water from the hot water supply passage to a supplied portion.

[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.

At the same time, in the gas-liquid contact section, the temperature of the exhaust contact liquid can be increased, so that the gas-liquid contact section recovers the exhaust heat in the exhaust air from the hot water supply burner to reduce the thermal efficiency of the hot water supply device. The hot water that has passed through the gas-liquid contact portion, the hot water and the water from the water supply channel, or the water that has passed the gas-liquid contact portion and the hot water from the hot water supply channel has the set target hot water supply temperature. Thus, by adjusting the fuel supply amount of the hot water supply burner, energy saving of the hot water supply device can be achieved.

[0004]

2. Description of the Related Art Conventionally, in this type of carbonated water heater,
The amount of hot water supplied to the hot water supply path for supplying hot water from the heat exchanger for hot water supply to the supplied section is set to a fixed amount, and the amount of fuel supplied to the hot water supply burner and the amount of water supplied to the supplied section are determined by the hot water supply path. Based on the fact that the supplied hot water amount is a constant hot water amount, the hot water supply temperature to the supplied portion is controlled so as to reach the set target hot water supply temperature.

Therefore, when hot water is simultaneously supplied to the supplied section and the general hot water tap, the amount of hot water supplied to the hot water supply path is reduced by an amount appropriately supplied to the general hot water supply path. Since proper control of the fuel supply amount and the amount of water supplied to the supply destination cannot be performed, the carbonated water heater is configured so that simultaneous supply of hot water to the supply destination and the general hot water tap is not performed.

More specifically, if the general hot water tap is opened while hot water is being supplied to the supply section, the hot water supply to the supply section is interrupted, and the hot water supply to the general hot tap is interrupted. When there is a request to start hot water supply to the supply unit, control has been performed so that hot water supply to the supplied unit is not started until hot water supply to the general hot water tap ends.

[0007]

However, according to the above-mentioned prior art, hot water supply to the supplied part is interrupted or delayed, so that it is difficult to speed up the supply of hot water to the supplied part. During hot water supply to the hot water tap, even if there is a request to start hot water supply to the supplied part, hot water supply to the supplied part is not performed. The effect of improving the thermal efficiency of the hot water supply device cannot be exhibited by the exhaust heat recovery, and there is a disadvantage that the energy saving of the hot water supply device cannot be achieved accordingly.

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

[0009]

According to a first characteristic configuration of the carbonated hot water supply apparatus according to the present invention, the hot water supply path is provided with a hot water supply amount adjusting means for adjusting a hot water supply amount to the supplied portion, and the water supply path is provided. A water supply path that guides water from the water supply path to the pouring path, or to the guide path that guides water from the water supply path to the gas-liquid contact portion,
Water supply amount adjusting means for adjusting the amount of water supplied to the supplied portion is provided, and the hot water supply control means for controlling the hot water supply amount adjusting means, the water supply amount adjusting means, and the fuel supply amount adjusting means comprises: Hot water supply such that the outlet temperature of the heat exchanger for hot water supply reaches the set target temperature based on the set upper limit capacity of the hot water supply burner and the detected water supply temperature of the water supply path in a simultaneous hot water supply state to the hot water supply path and the general hot water supply path. The amount of hot water supplied to the general hot water supply path and the total amount of hot water supplied to the general hot water supply path are calculated based on the detected amount of hot water supplied to the general hot water supply path. The hot water supply amount adjusting means is adjusted so that the amount of water is adjusted, and the water supply amount adjusting means is adjusted so that the hot water supply temperature to the supply destination reaches the set target hot water supply temperature. Before the temperature reaches the set target temperature, In that it is configured to adjust the fuel supply amount adjusting means.

A second characteristic configuration of the carbonated hot water supply apparatus according to the present invention specifies a preferred specific configuration for implementing the first characteristic configuration, wherein water from a water supply channel is mixed with the general hot water supply channel. Hot water mixing means is provided, and the hot water supply control means is configured to control the hot water mixing means so that the hot water supply temperature of the general hot water tap becomes a set target temperature.

[0011]

According to the first feature of the present invention, based on the set upper limit capacity of the hot water supply burner and the detected water supply temperature of the water supply passage,
Calculate the flow rate of the hot-water supply heat exchanger such that the outlet temperature of the hot-water supply heat exchanger becomes the set temperature, and based on the detected hot-water supply rate to the general hot-water supply path, the hot-water supply rate to the general hot-water supply path So that the sum of the hot water supply and the hot water supply heat exchanger flow
Adjusting the hot water supply amount adjusting means, adjusting the hot water supply amount adjusting means so that the hot water supply temperature to the supplied portion becomes the set target hot water supply temperature,
Since the configuration is such that the fuel supply amount adjusting means is adjusted so that the outlet temperature of the hot water supply heat exchanger becomes the set temperature, it is necessary to perform appropriate control so that the hot water supply temperature to the supplied portion becomes the set target hot water supply temperature. While performing, it is possible to simultaneously supply hot water to the supplied part and the general hot water tap, and since the hot water burner can be burned at the set upper limit capacity, the gas-liquid contact part
A maximum amount of exhaust gas can always be supplied.

According to the second characteristic configuration, the hot water supply control means is configured to control the hot and cold water mixing means provided in the general hot water supply passage so that the hot water supply temperature of the general hot water tap becomes a set target temperature. Therefore, it is possible to set the outlet temperature from the hot water supply heat exchanger as high as possible while keeping the hot water supply temperature to the general hot water tap to a desired temperature, and therefore, the hot water supply from the hot water supply heat exchanger to the general hot water supply path is performed. Supply of hot water can be reduced as much as possible.

[0013]

According to the first characteristic configuration of the present invention, simultaneous hot water supply to the supplied portion and the general hot water tap is performed while appropriate control is performed so that the supplied hot water temperature reaches the set target hot water supply temperature. Can be performed and the maximum amount of exhaust gas can always be supplied to the gas-liquid contact portion. Therefore, the hot water supply to the supplied portion is interrupted or delayed, and the hot water supply to the supplied portion is interrupted. Is not possible even when there is a request to start the hot water supply to the part to be supplied during the hot water supply to the general hot water tap, because the simultaneous hot water supply cannot be performed. It is possible to provide a carbonated water heater capable of solving the inconvenience and performing the carbonated water supply with the carbon dioxide concentration increased as much as possible by sufficient exhaust gas.

According to the second characteristic configuration, the amount of hot water supplied from the hot water supply heat exchanger to the general hot water supply passage can be reduced as much as possible. A hot water supply device can be provided.

[0015]

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 unit 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 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 hot water supply path W8 that has passed through the connecting pipe 22 and the gas-liquid contact section 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.

First, the water supply channel 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.

The water supply passage W1 is provided with a thermistor S1 for detecting a water supply temperature Ti, a water amount sensor S2 for detecting a water supply amount Q1 from the water supply passage W1, and a water temperature correction valve 25. The water temperature correction valve 25 is a water amount adjustment valve that is automatically adjusted independently so that the higher the feed water temperature, the larger the flow rate and the lower the feed temperature, the lower the flow rate. It is configured to assist control for maintaining the tapping temperature To of the vessel 1 at a predetermined set temperature.

In the hot water supply path W2, a thermistor S4 for detecting the tapping temperature To of the hot water supply heat exchanger 1 and a hot water supply adjusting valve with a closing valve as a hot water supply adjusting means for adjusting the hot water supply Q4 to the bathtub B are provided. 13 are provided. 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.

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

The water supply passage W7 has an amount of water Q3 supplied to the bathtub B.
Water sensor S8 for detecting water supply and the amount of water Q supplied to bathtub B
A water supply amount adjustment valve 14 is provided as water supply amount adjustment means for adjusting the water supply amount 3, and a water supply passage W8 and a later-described guide passage W3 are connected to branch off on the downstream side. 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 supply and water supply to the bathtub B are performed. 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.

The carbonic water heater also 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, so that the exhaust contact liquid and the exhaust of the hot water supply burner 2 are sufficiently contacted. 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 Q3 supplied to the bathtub B can be adjusted.

Accordingly, by simultaneously supplying hot water and water from the hot water supply path and the carbonic acid hot water supply path, it is possible to perform carbonic water supply 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.

Further, the present carbonic water heater is provided with a general hot water supply passage W6 for leading the hot water from the hot water supply heat exchanger 1 to the general hot water tap K so as to branch off from the hot water supply passage 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 27 as a hot and cold water mixing means for mixing water from the hot water supply passage W6, the amount of water for detecting the opening of the general hot water tap K, and detecting the supply amount Q2 of hot water to the general hot water tap K A sensor S6 and a thermistor S7 for detecting a hot water supply temperature Tk of the general hot water tap K are provided. Therefore, by opening the general hot water tap K, general hot water can be supplied at any time, and by adjusting the hot water mixing valve 27, the hot water supply temperature Tk to the general hot water tap K can be adjusted. ing.

The control section H is mainly composed of a microcomputer, and has thermistors S1, S3, S4, S
7 and the water sensors S2, S6, S8 are connected, and the detection information of these sensors is inputted, 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,
The water supply amount adjustment valve 14, the intermittent valves 28 and 29, the water flow drive valve 23, and the controller 15 are connected, so that the hot water supply amount adjustment valve 13 and the water supply amount adjustment valve 14 are connected.
And hot water supply control means 101 for controlling the fuel supply amount adjusting means 4 and 5.

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 S5 for detecting the temperature of the gas-liquid contact portion G is provided near the filling layer 17 in the casing. The temperature sensor S5 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.

The water flow drive valve 23 is provided when the water from the jet nozzle 16 and the hot water from the hot water supply channel W2 or the water from the hot water supply channel W8 and the hot water from the hot water supply channel W2 are supplied.
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 to 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.

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. In the carbonated hot water supply apparatus of the present embodiment, the pouring path W4 is configured to drop hot water into the bathtub B at a speed of about 24 l / min per minute, and the pores 24 are configured by holes having a diameter of 4 mm. Have been. 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 not supplied, and as the water flow drive valve 23 is closed, water or hot water is gradually discharged from the fine holes 24 so that no water or hot water is stored.

The hot water supply control means 101 is configured to execute the following six 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 a hot water general simultaneous hot water supply mode in which hot water supply and general hot water supply are simultaneously performed. The fifth hot water supply mode is a carbonic acid general simultaneous hot water supply mode in which carbonic acid hot water supply and general hot water supply are simultaneously performed. The sixth hot water supply mode is
This is the additional heating water supply mode by the additional heating unit C.

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 hot water supply amount adjustment valve 13 or the intermittent valve 29 is opened, and 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, a required heat amount Jn is obtained from the upper limit of the hot water supply amount 24 l / min to the bathtub B, the set target hot water temperature Tbs, and the hot water temperature Ti, and the set upper limit capacity of the heating capacity of the hot water burner 2 is 600 kcal. The smaller one is compared to / min, which is the hot water supply heat amount Jo.

## EQU1 ## Jn = (Tbs-Ti) .24 (kcal / 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 from the hot water supply heat amount 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. The hot water supply amount adjusting valve 13 is adjusted such that the detected water supply amount Q1 of the water amount sensor S2 becomes equal to the hot water supply heat exchanger flow amount Qex. In the present carbonic water heater, the set target temperature Tex of the outlet temperature of the hot water supply heat exchanger 1 is 80 ° C.

## EQU2 ## Qex = Jo / (Tex-Ti) (l / min) Qex ← Q1, where Tex = 80 (° C.)

Next, as shown in Equation 3, the required water supply amount Qw is calculated from the hot water supply heat amount Jo, the set target hot water supply temperature Tbs, the detected water supply temperature Ti of the thermistor S1, and the detected water supply amount Q1 of the water amount sensor S2. Water supply amount Q detected by water amount sensor S8
Water supply amount adjusting valve 1 so that 3 becomes required water amount Qw
Adjust 4

Qw = Jo / (Tbs-Ti) -Q1 (1 / min) Qw ← Q3

Next, according to Equation 4, the water supply heat exchanger Q is detected from the water supply amount Q1 detected by the water amount sensor S2, the water supply amount Q3 detected by the water amount sensor S8, and the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1. The fuel supply amount Gas required to bring the first hot water temperature to the set target temperature Tex is obtained, the feed forward control of the fuel supply amount adjustment valve 4 is performed, and the detected hot water supply temperature is detected based on the detected temperature To of the thermistor S4. In order to maintain the temperature To at the set target temperature Tex, the feed
The back correction control is performed. The rotation speed of the blower fan 3 is
It is controlled based on the fuel supply amount Gas.

(4) Gas = C1 · (Tbs−Ti) · (Q1 + Q3) + C2 · (Tex−To) (kcal / min) where Tex = 80 (° 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 hot water supply switch 15b is operated, before the hot water supply burner 2 is ignited, first, the hot water supply amount adjusting valve 13 is opened to inject water into the water reservoir F for a predetermined time, and at the same time, the temperature sensor S5 is used. The temperature of the liquid contact portion G is checked, and if the temperature is higher than a predetermined temperature, the gas-liquid contact portion G is cooled by driving the blower fan 3. When water is suddenly ejected from the ejection nozzle 16 in a state where the gas-liquid contact portion G is overheated to a predetermined temperature or more, an abnormal sound such as a shack is generated, the water evaporates violently, and a large amount of water is discharged from the exhaust port 18. This is because water vapor is discharged, which is not preferable for use of the carbonic water heater. Next, after a lapse of a predetermined time, if the gas-liquid contact portion G is lower than the predetermined temperature, the hot water supply amount adjusting valve 13 and the intermittent valve 28 are opened, and the hot water supply burner 2 is opened.
Is ignited, and the hot water supply by the hot water supply path and the hot water supply path is started.

The hot water supply control means 101 performs the following control. First, as shown in Equation 5, the upper limit of the hot water supply rate to the bathtub B is 24 l / min, the set target hot water supply temperature Tbs, and the detected water supply temperature T
The required heat amount Jn is obtained from i and the smaller one is set as the hot water supply heat amount Jo compared with the set upper limit capacity 750 kcal / min of the heating capacity of the hot water supply burner 2.

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

Next, the hot water supply adjusting valve 13 and the hot water supply adjusting valve 1 are calculated based on the hot water supply heat amount Jo obtained by the equation (5).
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 S4, 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.

Next, the hot water filling general simultaneous hot water supply mode will be described. In the hot water filling general simultaneous hot water supply mode, the general hot water tap K is detected by the water amount sensor S6 during the execution of the hot water filling hot water supply mode.
It is executed as needed as the opening of the port is detected. In the present carbonated water heater, even if the hot water supply switch 15a is operated during the execution of the general hot water supply mode, the hot water supply general simultaneous hot water supply mode is not executed.

In the hot water general simultaneous hot water supply mode, hot water supply control means 101 performs the following control. First, the hot water supply heat amount Jo is determined according to Equation 1. Next, according to Equation 2,
The hot water supply heat exchanger flow rate Qex is calculated.

Next, as shown in Expression 6, the water amount sensor S
2 from the detected water supply amount Q1 and the water supply amount Q2 detected by the water amount sensor S6, the water supply amount Q4 to the hot water supply path W2 is calculated, and the water supply amount Q2 detected by the water amount sensor S6 and the water supply temperature Tk detected by the thermistor S7 are calculated. From the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1, the quantity Q5 of hot water supplied to the general hot water supply path W6 is calculated by calorific value calculation. Here, the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1 is 80 ° C.

Q4 = Q1-Q2 (l / min) Q5 = Q2 · Tk / Tex (l / min) where Tex = 80 (° C.)

Then, as shown in Equation 7, the hot water supply amount is adjusted such that the sum of the hot water supply amount Q4 to the hot water supply passage W2 and the hot water supply amount Q5 to the general hot water supply passage W6 becomes the hot water supply heat exchanger flow amount Qex. Adjusting valve 13 to supply hot water Q4 to hot water supply path W2
Control. By the way, hot water supply Q4 to hot water supply channel W2
Changes according to the water supply amount Q1, as shown in Expression 6,
Further, if the hot water supply amount adjusting valve 13 is adjusted, the water supply amount Q1 changes.
2 can be controlled.

Qex ← Q4 + Q5 = Q1-Q2 + Q5 Therefore, Qex + Q2-Q5 ← Q1

Accordingly, the hot water supply control means 101 determines the hot water supply heat amount Jo as the set upper limit capacity of the hot water supply burner 2, the set target temperature Tex of the outlet temperature of the hot water supply heat exchanger 1, and the water supply passage W1.
Of the hot water supply heat exchanger 1 on the basis of the detected feed water temperature Ti of the thermistor S1 as the detected feed water temperature.
Is calculated to be the set target supply temperature Tex, based on the detected supply water amount Q2 of the water amount sensor S6 as the detected supply water amount to the general hot water supply path W6.
The hot water supply adjusting valve 13 is adjusted so that the sum of the hot water supply Q4 to the hot water supply passage W2 and the hot water supply Q5 to the general hot water supply passage W6 becomes the hot water supply heat exchanger flow Qex.

Next, as shown in Expression 8, the amount Q4 of hot water supplied to the hot water supply passage W2, the set target temperature Tex of the outlet temperature of the hot water supply heat exchanger 1, and the detected water supply temperature Ti of the thermistor S1.
And the set target hot water supply temperature Tbs, the required supply water amount Qw
Is calculated, and the water supply amount adjusting valve 14 is adjusted so that the detected supply water amount Q3 of the water amount sensor S8 becomes the required supply water amount Qw.

Qw = (Tex−Tbs) / (Tbs−Ti) · Q4 (1 / min) Qw ← Q3 where Tex = 80 (° C.)

Next, as shown in Expression 9, the thermistor S
4, the feedback control of the fuel supply amount adjusting valve 4 for adjusting the fuel supply amount Gas so as to maintain the tapping temperature To of the hot water supply heat exchanger 1 at the set target temperature Tex based on the detected tapping temperature To. Do. Here, the set target temperature Tex of the tapping temperature of the hot water supply heat exchanger 1 is 80 ° C. The rotation speed of the blower fan 3 is controlled based on the fuel supply amount Gas.

Gs = C3 · (Tex−To) (kcal / min) where Tex = 80 (° C.) C3 is a control coefficient.

Next, the carbonic acid general simultaneous hot water supply mode will be described. The carbonic acid general simultaneous hot water supply mode is executed at any time as the opening of the general hot water tap K is detected by the water amount sensor S6 during the execution of the carbonic acid hot water supply mode. The present carbonic acid hot water supply apparatus is configured so that the carbonic acid general simultaneous hot water supply mode is not executed even if the carbonic acid hot water supply switch 15a is operated during the execution of the general hot water supply mode.

In the carbonic acid general simultaneous hot water supply mode, hot water supply control means 101 performs the following control. First, the hot water supply heat amount Jo is determined according to Equation 5. Hereinafter, control is performed in the same control mode as in the hot water filling general simultaneous hot water supply mode.

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 are mixed to perform hot water supply of carbonic acid to the bathtub B.

The jet nozzle 16 may be provided in both the hot water path and the hot water path.

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 K General hot water tap G Gas-liquid contact part Gas Fuel supply amount Tbs Set target hot water temperature Tex Set target temperature Ti Detected water temperature Tk Hot water temperature of general hot water tap To Outlet temperature Tx Hot water temperature Qex Heat exchanger for hot water supply Water quantity Q3 Supply water quantity Q4 Supply hot water quantity Q5 Supply hot water quantity to general hot water supply path W1 Water supply path W2 Water supply path W3 Guide path W4 Pouring path W6 General hot water supply path W7 Water supply path W8 Water supply path W9 Water supply path 1 Heat exchanger for hot water supply 2 Hot water supply burner Reference Signs List 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 27 hot and cold water mixing means 101 hot water supply control means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kensaku Inoue 1-52-1, Oka, Minami-ku, Minato-ku, Osaka-shi, Osaka (56) References JP-A-6-174297 (JP, A) 1-102646 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (2)

(57) [Claims] 1. Hot water supplied from a hot water supply heat exchanger (1) supplied in a water supply path (W1) is supplied to a hot water supply path (W2) for supplying a supply section (B) and a general hot water tap (K). A hot water supply burner (2) for heating the hot water supply heat exchanger (1).
Fuel supply amount adjusting means (4, 5) for adjusting the fuel supply amount (Gas) to the gas, 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 ( 1) Hot water from water or water supply channel (W
7) A guide path (W3) for contacting the exhaust gas with the gas from the gas-liquid contact section (G) as the exhaust contact liquid, and hot water and a water supply path (W7) that have passed through 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 device, wherein a hot water supply amount adjusting means (13) for adjusting a hot water supply amount (Q4) to the supply target portion (B) is provided in the hot water supply passage (W2); To the water supply channel (W8) that guides the water to the pouring channel (W4) or the guide channel (W3) that guides the water from the water supply channel (W7) to the gas-liquid contact portion (G). Water supply amount adjustment means (14) for adjusting the water supply amount (Q3) to B); the hot water supply amount adjustment means (13); and the water supply amount adjustment means (14). 14) and the hot water supply control means (101) for controlling the fuel supply amount adjusting means (4, 5) are provided by the hot water supply path (W2).
And in the simultaneous hot water supply state to the general hot water supply path (W6), the set upper limit capacity of the hot water supply burner (2) and the water supply path (W6).
Based on the detected supply water temperature (Ti) of 1), the tap water temperature (To) of the hot water supply heat exchanger (1) is set to the set target temperature (T).
ex) to calculate the flow rate (Qex) of the hot water supply heat exchanger, and based on the detected hot water supply rate to the general hot water supply path (W6),
The hot water supply so that the sum of the hot water supply amount (Q4) to the hot water supply passage (W2) and the hot water supply amount (Q5) to the general hot water supply passage (W6) becomes the water supply heat exchanger flow amount (Qex). The water supply amount adjusting means (1) is adjusted so that the hot water supply temperature (Tx) to the supplied portion (B) becomes the set target hot water supply temperature (Tbs).
4), the fuel supply amount adjusting means (4, 5) is adjusted so that the tapping temperature (To) of the hot water supply heat exchanger (1) becomes the set target temperature (Tex). Carbonated water heater. 2. A water supply channel (W6) is connected to the general hot water supply channel (W6).
Hot water mixing means (27) for mixing the water from 9) is provided, and the hot water supply control means (101) is provided with the general hot water tap (K).
2. The carbonic water heater according to claim 1, wherein the hot water supply means is controlled such that the hot water supply temperature (Tk) becomes a set target temperature.