JP3536735B2 - 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 device, and more particularly, to a hot water supply device having a hot water storage tank as a heat exchange medium tank in a combustion can body and passing a heat exchange section for hot water supply into the hot water storage tank. The present invention relates to a hot water supply apparatus for secondary indirect heating.

[0002]

2. Description of the Related Art In a conventional general instantaneous hot water supply apparatus, a heat exchange section such as a heat exchange coil disposed in an exposed state in an upper portion of a combustion chamber or the like directly receives combustion heat, thereby generating heat. Water passing through the exchange coil is instantaneously heated. On the other hand, there is also provided an instantaneous hot water supply device of a type in which a semi-hot water storage tank which is not so large is provided at an upper portion of the combustion chamber, and this is used as a heat exchange medium tank, in which a heat exchange section such as a heat exchange coil for hot water supply is arranged. Have been. In this type of instantaneous water heater, the semi-hot water tank is heated by combustion heat, and the water passing through a heat exchange coil arranged in the semi-hot water tank is
Hot water was supplied by indirect heating (liquid-liquid exchange) secondary by hot water in the semi-hot water storage tank.

[0003]

However, in the instant water heater of the type in which the hot water in the heat exchange coil is further instantaneously heated by the hot water in the hot water storage tank using the hot water storage tank.
There is no automatic hot water supply temperature that is automatically adjusted to the hot water supply set temperature and then supplied from the hot water supply terminal. Therefore, it is necessary to use a faucet as a mixing faucet when supplying hot water such as hot water for showers and bathtubs, and if the faucet does not have a temperature control function, use the amount of water and hot water with a curan. Had to be adjusted manually.

Accordingly, the present invention solves the above-mentioned drawbacks of the conventional hot water supply apparatus, has a hot water storage tank as a heat exchange medium tank, and uses hot water in the hot water storage tank to flow water in a hot water supply heat exchange unit such as a heat exchange coil. Next, an object of the present invention is to provide a hot water supply apparatus capable of automatically adjusting a hot water temperature to a set hot water supply temperature and supplying the hot water in a hot water supply apparatus that performs heat exchange heating.

[0005]

In order to achieve the above object, a hot water supply apparatus according to the present invention comprises a combustion can body provided with a hot water storage tank as a heat exchange medium tank, and a water inlet for the combustion can body to the hot water storage tank. And a hot water supply path, a hot water supply heat exchange unit that is arranged in the hot water storage tank so as to be indirectly heated by the hot water in the hot water storage tank, and a bypass path from the water supply path to the hot water supply path, and hot and cold water mixing device for mixing the hot water from the water and the hot water passage from the bypass passage, to flow out該湯water mixing means
A hot water supply path for guiding hot water further downstream, and a hot water supply path provided in the hot water supply path.
And a controller for controlling the total flow rate of the flowing water.
When the controller command to said hot and cold water mixing means defining a mixing faucet ratio from the detected incoming water temperature and the detected incoming water flow rate detected hot water temperature and the entering-water channel of the tapping channel and set hot water supply temperature co
Even if the entire amount of incoming water is passed through the hot water supply heat exchange section,
When the temperature of hot water to be supplied does not reach the set hot water supply temperature
The total flow rate is controlled by the total flow rate adjusting means so that the total flow rate
Narrow down to a flow rate that allows hot water to be supplied at the temperature.
The first feature is that the control configuration is such that a command is issued . The hot water supply device of the present invention, in addition to the first feature, the controller may control for controlling the combustion in the combustion can body so that the temperature of the hot water storage tank is maintained within a certain temperature range including the target maintaining temperature The second feature is that the configuration is adopted. Further, in the hot water supply apparatus of the present invention, in addition to the second feature, the controller may further include a feedforward combustion control in accordance with a heat exchange heating amount required by the water flowing in the hot water tank, and a controller for controlling hot water in the hot water tank. Control for controlling combustion in a combustion can body by combining one or both of feedback combustion control according to the difference between the target maintenance temperature and the actual temperature
The third feature is that the configuration is adopted. The hot water supply device of the present invention, in addition to the above first to third one aspect, has a tub-only hot water path branched from the middle of the hot water supply passage, con
Troller supplies hot water to the bathtub through the hot water supply path dedicated to the bathtub.
In no event of performing pointing water constant amount of water to Nuruku the bath temperature as one of the bath hot water supply function for, difference and this was a control arrangement for controlling to flow hot water little after water
Are the fourth features.

According to the first feature, the water supplied from the water inlet is heated through the hot water supply heat exchange unit in the hot water storage tank of the combustion can body, and is discharged to the hot water outlet. It flows through the hot water supply channel. In the first aspect, a bypass path, hot water mixing means are provided, and a controller for controlling the hot water mixing means is provided, so that a preset hot water supply temperature and a hot water temperature detected in the hot water path are provided. And the incoming water temperature and incoming water flow rate detected in the water inlet channel are sent to the controller, where the mixing ratio of the hot and cold water from the bypass channel side and the hot water discharging channel side is calculated. It is performed on the mixing means. As a result, the valves and the like of the hot and cold water mixing means are operated to the position of the predetermined hot and cold water mixing ratio. According to the first feature, in a hot water supply device that indirectly heats water flow by passing a hot water supply heat exchange section through a hot water storage tank of a combustion can body, the temperature of hot water is automatically adjusted to a set hot water supply temperature. Can be supplied.

According to the first feature, the hot water supply path following the hot water supply terminal is provided with total flow rate adjusting means for adjusting the total flow rate of water, and a controller for controlling the total flow rate adjusting means is provided. Even in a case where the set hot water supply temperature does not reach the set hot water supply temperature even if the entire amount of incoming water is heated and exchanged, the supply of hot water at the set hot water supply temperature can be ensured by reducing the total flow rate .

According to the second feature, the hot water storage tank of the combustion can body is maintained within a predetermined temperature range including a predetermined target maintenance temperature, so that it passes through the hot water supply heat exchange section in the hot water storage tank. A stable amount of heat can be reliably given to the water flow,
It is possible to secure stable hot water supply and hot water supply. The target maintenance temperature is, for example, 80 ° C., and a certain range at that time can be 75 ° C. to 85 ° C., but is not limited thereto. The target maintenance temperature is preferably 3 to 5 ° C around 80 ° C. It is preferable that the certain range is 3 ° C. to 5 ° C. above and below the target maintenance temperature.

According to the third feature, in addition to the second feature, the combustion in the combustion can is controlled by adjusting the temperature of the hot water tank to a target maintenance temperature within a certain range. By performing feedforward combustion control (hereinafter referred to as FF combustion control) with the heat exchange heating amount required by the water flowing through the heat exchange unit for hot water supply in the hot water tank, the amount of heat deprived of the water flow is added from the beginning. Thus, the stability of the temperature of the hot water storage as the heat exchange medium in the hot water storage tank can be secured from the beginning. In addition to or in addition to the FF combustion control, feedback combustion control (hereinafter referred to as FB combustion control) according to the difference between the actual temperature of the hot water in the hot water tank and the target maintenance temperature is performed. Hot water in the tank can be more reliably and stably maintained near the target maintenance temperature. Thereby, a good and stable hot water supply can be secured.

[0010] According to the fourth feature, the first to first features are provided.
In addition to any one of the third features, in the case where the hot water is supplied by heating the water passing through the hot water supply heat exchange unit via the hot water in the hot water storage tank, even when the hot water supply operation is not actually performed, the hot water storage tank may be used. Is maintained near a predetermined target maintenance temperature. For this reason, if the hot water supply control port on the hot water side of the hot water mixing means is opened when the hot water supply operation is not performed, the hot water supply path leading to the hot water supply terminal will be heated to a high temperature, and the There is a problem that water suddenly flows out or hot water circulates from the hot water path to the bypass path side through the hot water mixing means. Therefore, in this type of hot water supply apparatus, when the hot water supply operation is not actually performed, it is necessary to close the hot water supply control port on the hot water side of the hot and cold water mixing means. On the other hand, when the hot water supply device is combined with bath equipment, there is a case where a function is required to lubricate the bathtub temperature by pouring a fixed amount of unheated water into the bathtub. In the case of such a hot water supply device having a "warm" function, the hot water supply path is filled with non-heated water (water) after the warming function is performed. When the hot water supply function is performed, cold water flows out at the initial stage, and a rapid temperature rise to a set temperature is prevented.
Therefore, according to the fourth feature, after a certain amount of water is poured into the bathtub, the hot water side of the hot / water mixing means is once opened to allow a small amount of hot water to flow, so that the water in the hot water supply passage is replaced with hot water. Therefore, at the time of the next hot water supply operation, hot water at the set hot water supply temperature can be supplied promptly without cold water being supplied at the beginning. The hot water that flows after the bath is
You can make it flow hot water at the set hot water temperature,
The present invention is not limited to this, and hot water of another appropriate temperature may be flowed. Further, the flowing hot water may be a fixed amount or a fixed time.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a schematic configuration diagram of a hot water supply apparatus according to an embodiment of the present invention, FIG. 2 is a flow chart of temperature control of hot water in a hot water storage tank of a combustion can body according to an embodiment of the present invention, and FIG. 3 is another embodiment of the present invention. It is a control flow figure explaining an aspect.

Referring to FIG. 1, first, the entire hot water supply apparatus will be described. Reference numeral 10 denotes a combustion can body, which is provided with a hot water storage tank 12 called a so-called semi-hot water storage tank above a combustion chamber 11, and a blower 13 a and an oil spray nozzle 1 for the combustion chamber 11.
An oil burner 13 having 3b is provided to face. The hot water storage tank 12 functions as a heat exchange medium tank, and hot water in the hot water storage tank 12 is not used for hot water supply. A plurality of exhaust gas passages 14 are provided in the hot water storage tank 12 so as to penetrate in the vertical direction. The hot water tank 1
2 is provided with a hot water storage temperature sensor 12a.

A hot water supply circuit 20 is provided for the hot water storage tank 12.
Is provided. The hot water supply circuit 20 includes a water supply channel 21, a heat exchange coil 22 for hot water supply as a heat exchange unit for hot water supply, a hot water supply channel 23, and a bypass 2 from the water supply channel 21 to the hot water supply channel.
4, hot water mixing means 25 for mixing hot water from the hot water path 23 and the bypass path 24, and a hot water supply path 26 for guiding hot water flowing out of the hot water mixing means 25 to a hot water supply terminal 29 such as a hot water tap. And a hot-water supply path 27 dedicated to a bathtub branched from the hot-water supply path 26. The heat exchange coil 22 for hot water supply is immersed in the water storage tank 12 and is wound around the water storage tank 12 at a position near the outer periphery thereof many times. The inlet channel 21 is provided with an inlet temperature sensor 21a and an inlet flow sensor 21b.
3a, and a hot water supply temperature sensor 26a
Is provided. Further, a total flow rate adjusting means 28 is provided in the hot water supply passage 26. This total flow control means 28
The total flow rate of the water flowing through the hot water supply passage 26 is controlled so that the outlet water temperature cannot reach the set hot water supply temperature even if the entire amount of the water flowing from the water inlet passage 21 is subjected to heat exchange heating. It is a flow control valve provided for regulation.

A circulation circuit 30 for reheating the bath is provided for the hot water storage tank 12. The bath reheating circuit 30 includes a bath recirculation circuit 30 and a bath reheating device that is wound a number of times inside the hot water storage tank 12 of the combustion can body 10 at a position inside the case of the hot water supply heat exchange coil 22. And a heat return coil 32 for bathing. The water in the bathtub (not shown) is guided into the hot water storage tank 12 by the circulation pump 34 and is heated. A bypass 36 is provided between the bath outward path 31 and the bath return path 33 via a three-way valve 35, and the bathtub hot water supply path 27 is provided in the bypass path 36.
7a, a flow sensor 27b, and a check valve 27c. The bath return path 33 has a bath temperature sensor 3
3a and a bath water flow switch 33b are provided.

A heating circuit 40 is provided for the hot water tank 12.
Is configured. In the heating circuit 40, a heating high-temperature outgoing path 41 is directly connected to the top of the hot water tank 12, and a heating return path 43 is connected to the hot water tank 12 so that heating can be performed by directly using hot water in the hot water tank 12. It is directly connected to the lower part of the tank 12. A circulation pump 44 is provided in the heating return path 43, and a heating low-temperature forward path 42 is provided branching from the downstream part thereof. Bypass valve 45 from the top of hot water tank 12
The bypass path 46 is connected to the heating return path 43 via. A small water storage section 47 is provided in the middle of the heating return path 43 to which the bypass path 46 is connected. The water storage section 47 has a water level detection sensor 47a for detecting the water level of the water storage tank 12 of the combustion can body 10, and a heating pressure relief valve 47b. Is provided. 48
Is a reserve tank, which replenishes water through the water storage section 47 when the water level decreases, such as when the water level in the hot water tank 12 decreases.

Reference numeral 50 denotes a controller,
1. It is communicatively connected to the bath remote control 62 and the heating remote control 63, and controls each part of the apparatus.

The hot water supply operation will be described based on the above configuration. Now, in a state where the main switch of the hot water supply operation is turned on by the hot water supply remote controller 61, the oil burner 13 is burned as necessary even if hot water supply by the actual hot water supply operation is not performed, and the combustion can body The water in the hot water storage tanks 12 is heated, and is brought into a standby state where the heat exchange heating of the water passing through the hot water supply heat exchange coil 22 can be performed at any time. Then, when the hot water supply terminal 29 is opened and the actual hot water supply is started, the water from the water inlet 21 is heated by the hot water in the hot water storage tank 12 by passing through the heat exchange coil 22 for hot water supply, and The hot water is supplied to the hot water supply path 2 through the hot water mixing means 25.
6 and flows out of the hot water supply terminal 29. Controller 5
0 is the incoming water temperature detected by the incoming water temperature sensor 21a of the incoming water passage 21, the incoming water flow detected by the incoming water flow rate sensor 21b, and the outgoing water temperature detected by the outgoing water temperature sensor 23a of the outgoing water passage 23 (normally higher than the set hot water supply temperature. ) And the set hot water supply temperature set by the hot water supply remote controller 61 by the user or the like, so that the hot water after the hot and cold water mixing becomes the set hot water supply temperature so that the water flowing through the bypass passage 24 and the hot water flowing through the hot water passage 23 are mixed. The ratio is calculated, and a command is issued to the hot and cold water mixing means 25 so as to achieve the calculated mixing ratio. Thereby, the hot water from the hot water supply path 23 and the non-heated water from the bypass path 24 are mixed at an appropriate mixing ratio, become hot water at a predetermined hot water supply temperature, and flow into the hot water supply path 26.

The temperature adjustment using the hot and cold water mixing means 25 is carried out in such a manner that the temperature of the hot water flowing through the hot water supply path 23 is higher than the set hot water supply temperature, and the temperature is lowered by mixing the water from the bypass path 24 to the predetermined temperature. In the case where the temperature is set to the hot water supply temperature, on the other hand, even if the entire amount of the incoming water is passed through the hot water supply heat exchange coil 22 and heated, the temperature of the hot water discharged does not reach the set hot water supply temperature. In this case, the total flow rate is regulated by the total flow rate adjusting means 28. That is, when the hot water supply terminal 29 is opened and actual hot water supply is started, the controller 50 can heat the hot water in the hot water storage tank 12 with the set hot water supply temperature, the incoming water temperature detected by the incoming water temperature sensor 21a. From the temperature per unit flow rate, a flow rate capable of supplying hot water to the set hot water supply temperature is calculated. Then, the controller 50 issues an operation command to the total flow rate adjusting means 28 of the hot water supply passage 26 so that the calculated flow rate is obtained. Thus, the total flow rate adjusting means 28 narrows the flow rate flowing through the hot water supply passage 26 to the calculated flow rate, so that hot water having a temperature not reaching the set hot water supply temperature is not supplied.

Next, control of the hot water temperature of the hot water storage tank 12 will be described with reference to FIG. In the hot water supply apparatus according to the present invention, the heat exchange in the hot water supply heat exchange coil 22 is not directly performed by the heat exchange by the heat of combustion in the combustion can body 10,
Since the water in the hot water supply heat exchange coil 22 passing through the hot water in the hot water storage tank 12 heated by the combustion heat is secondarily indirectly heated, the water in the hot water supply heat exchange coil 22 is heated. Although the temperature of the hot water does not exceed the temperature of the hot water in the hot water storage tank 12 and becomes extremely high, the temperature of the water in the hot water storage tank 12 is maintained so that the water can function as a heating medium at any time. There is a need. Further, after the actual hot water supply operation is started, the temperature of the hot water as the heat exchange medium in the hot water storage tank 12 decreases due to the heat exchange, and it is necessary to perform heating to compensate for this. Now, when the main switch of the hot water supply operation is turned on by the hot water supply remote controller 61 or the like, the controller 50 first determines whether or not the hot water supply terminal 29 is opened and the incoming water flow rate sensor 21b detects the minimum operating water amount of the burner combustion. Is monitored (step S1), and if no, the actual hot water supply has not been started, so the controller 50 performs FB combustion to maintain the temperature of the hot water tank 12 at a predetermined target maintenance temperature, for example, 80 ° C. While controlling, the temperature of the hot water storage tank 12 is set to a predetermined upper limit temperature, for example, 8
On / off combustion control of burner combustion is performed so that the temperature falls within a range of 5 ° C. and a predetermined lower limit temperature, for example, 75 ° C. That is, during the standby state of the hot water supply operation in which the main switch of the hot water supply operation is turned on but the actual hot water supply operation is not performed, the target maintenance temperature of the hot water storage tank 12 and the detected hot water storage temperature detected by the hot water storage temperature sensor 12a are determined. The difference is calculated, and FB combustion control is performed according to the temperature difference (step S2). When the temperature of hot water tank 12 reaches the target maintenance temperature (Yes in step S3), FB combustion control ends (step S4). If the hot water tank 12 is not at the target maintenance temperature (step S
In step S5, if the detected hot water storage temperature is equal to or higher than a predetermined upper limit temperature, for example, 85 ° C. (YES in step S5), the burner combustion is stopped (step S6). ). When the combustion is stopped, the process waits until the temperature of the hot water storage tank 12 drops to a predetermined lower limit temperature, for example, 75 ° C. or less (Yes in step S7), and starts the combustion again (step S7).
8). That is, in steps S2 to S8, the controller 50 maintains the temperature of the hot water tank 12 within a certain temperature range including the target maintenance temperature.

On the other hand, if the main switch of the hot water supply operation is turned on and the flow is equal to or more than the minimum working water amount in step S1 (YES in step S1), the actual hot water supply operation is being performed. Then, the burner is subjected to FF combustion control so that the amount of water passing through the hot water supply heat exchange coil 22 in the hot water storage tank 12 becomes equal to the required heat exchange heating amount (step S9). That is, the FF combustion control is performed for the heat exchange heating amount required to supply hot water at the set hot water supply temperature. By performing such combustion, the amount of heat removed from the hot water in the hot water tank 12 can be supplemented, and the hot water tank 12 can be maintained at a stable temperature state. In this case, the amount of heat exchange heat required for the water flow is calculated from the detected incoming water flow rate, the detected incoming water temperature, and the set hot water supply temperature. While the combustion by the FF combustion control is being performed, the controller 50 further incorporates the detected hot water storage temperature information of the hot water tank 12 and calculates a difference between the target maintenance temperature of the hot water tank 12 and the detected hot water storage temperature. The FB combustion control according to the difference is performed (step S10). The FB combustion control in step S10 and the FB combustion control in step S2 are the same FB combustion control, but may be different in specific details. When the temperature of the hot water tank 12 reaches the target maintenance temperature by the FF combustion control and the FB combustion control (Yes in step S3), the FB combustion control is temporarily terminated (step S4), otherwise, step S5 In steps S8 to S8, the FF combustion control and FB combustion control are performed while on / off control is performed so that the temperature of the hot water tank 12 falls within the range between the upper limit temperature and the lower limit temperature.
Combustion control is performed. In addition, in the above-mentioned FF combustion control, in addition to the hot water supply operation, when the bath reheating operation and the heating operation using the hot water storage tank 12 are simultaneously performed, the virtual necessary heat exchange heating amount for the predetermined reheating, The virtual required heat exchange heat amount for heating is added to the required heat exchange heat amount for hot water supply. The virtual required heat exchange heating amount for reheating and the virtual required heat exchange heating amount for heating are respectively determined and stored in advance by appropriate experiments.

Referring to FIG. 3, another embodiment of the present invention will be described. The present embodiment is applicable to a case where a hot water supply device of a system (a liquid-liquid heat exchange system) that instantaneously heats water passing through the hot water supply heat exchange coil 22 with hot water in the hot water storage tank 12 (hereinafter referred to as a liquid-liquid heat exchange system) is combined with bath equipment. The present invention relates to control in a case where water supply, which is one of bath functions, is performed using the hot water supply device of the present invention. That is, when the hot water supply device is combined with the bath equipment, it is required that the hot water supply device perform a function of immersing a fixed amount of unheated water in the bath tub to lubricate the bath tub temperature as one of the bath functions. Sometimes. On the other hand,
In the case of the liquid-liquid heat exchange type hot water supply apparatus, the hot water side of the hot and cold water mixing means 25 is kept closed in principle during standby without hot water supply. This is because it is necessary to hold hot water in the hot water storage tank 12 and prepare for hot water supply even during hot water supply standby. In this case, if the hot water side of the hot water mixing means 25 is opened during the hot water supply standby, the water in the bypass passage 24 is also heated in such a manner that the hot water circulates toward the bypass passage 24, or This is because there is a problem that the water in the hot water supply passage 26 is gradually heated to an unnecessarily high temperature. Therefore, when such a principle is left as it is, the hot / water mixing means 25 keeps the hot water side closed even after performing the water supply by the above-mentioned "warm" function. In the case where hot water supply, which is the original function, is continued after being filled with water, cold water flows out at the beginning, and a rapid rise in temperature to the set temperature is prevented. Therefore, in the present embodiment, after a certain amount of water is poured into the bathtub, the hot water side of the hot / water mixing means 25 is once opened and a small amount of hot water is allowed to flow, so that the water in the hot water supply passage 26 is appropriately heated with hot water. In the next hot water supply operation, hot water at the set hot water supply temperature can be supplied promptly without cold water being supplied at the beginning.

A specific description will be given with reference to FIG. Now, when the warming function is started by turning on the warm switch by the bath remote controller 62 or the hot water remote controller 61, the hot water supply apparatus keeps the hot water side of the hot and cold water mixing means 25 closed (step S21). The on-off valve 27a of the hot water supply path 27 for the bathtub is opened to start water supply. The amount of water is set to a predetermined fixed amount, for example, 10 liters, and is detected by the flow sensor 27b. When a certain amount of water is detected by the flow sensor 27b (Yes in step S22), the controller 50 controls the hot and cold water mixing means 25 so as to supply hot water at the set hot water supply temperature ( Step S23). Then, a predetermined fixed amount of hot water, for example, 3 liters flows, is detected by the flow rate sensor 27.
b, and if a certain amount is detected (YES in step S24), the controller 50 closes the on-off valve 27a to terminate hot water supply, and returns the hot water side of the hot / water mixing means 25 to the closed state (step S24). S25). In the above description, the constant amount of hot water does not necessarily need to be adjusted to the set hot water supply temperature, and may be other suitable temperature. Further, although the amount of the hot water is set to a fixed amount, the hot water may be flowed at an appropriate fixed time.

[0023]

According to the hot water supply apparatus of the first aspect, the present invention has the above-described structure and operation, and includes a combustion can body provided with a hot water storage tank as a heat exchange medium tank, and the combustion can body. A hot water supply passage for the hot water storage tank, a hot water supply path, a hot water supply heat exchange unit that is disposed in the hot water storage tank so as to be indirectly heated by hot water in the hot water storage tank, and from the water supply path to the hot water supply path. A bypass passage, a hot-water mixing means for mixing the water from the bypass passage and the hot water from the hot-water supply path, a hot- water supply path for guiding the hot water flowing out of the hot-water mixing means further downstream, and a hot water supply path.
The total flow rate adjusting means provided and the controller
The controller determines a hot water mixing ratio from the set hot water supply temperature, the detected hot water temperature of the hot water passage, the detected hot water temperature of the water inlet channel, and the detected hot water flow rate, instructs the hot water mixing means, and receives the hot water . Pass the entire amount of water through the heat exchanger for hot water supply
Even if the temperature of the hot water supplied does not reach the set hot water supply temperature
In this case, the total flow rate is controlled by the total flow rate adjusting means.
Throttle until the flow rate is such that hot water can be supplied at a constant hot water supply temperature
Since the command control configured to written, also in the water heater the water flow by passing the hot water supply heat exchanger in the hot water storage tank to secondarily indirect heating of the combustion can body, automatically the temperature of the hot water It is now possible to supply the hot water adjusted to the set hot water supply temperature. In addition, even if the total amount of incoming water does not reach the set hot water supply temperature even if heat exchange heating is performed, the total flow rate can be narrowed down as much as necessary, and the supply of hot water at the set hot water supply temperature is ensured. be able to. According to the hot water supply apparatus of the second aspect , in addition to the effect of the configuration of the first aspect , the controller is configured to maintain the temperature of the hot water tank within a certain temperature range including the target maintenance temperature. With the control structure that controls the combustion in the combustion can, the temperature of the hot water in the hot water tank can be stabilized, so that a stable amount of heat can be supplied to the water passing through the hot water supply heat exchange section in the hot water tank. Water can be supplied reliably, and stable hot water supply and hot water supply can be secured. According to the hot water supply apparatus of the third aspect , in addition to the effect of the configuration of the second aspect , a control
The feed-forward combustion control according to the amount of heat exchange heat required by the water flowing through the hot water storage tank, and the feedback combustion control according to the difference between the target maintenance temperature of the hot water in the hot water storage tank and the actual temperature. Since the control configuration to control the combustion in the combustion can body by combining any one or both,
By performing FF combustion control with the heat exchange heating amount required by the water flowing through the heat exchange unit for hot water supply in the hot water storage tank, the amount of heat lost to the water flow can be added from the beginning, and the heat exchange in the hot water storage tank The stability of the hot water storage temperature as a medium can be secured from the beginning. Further, in addition to or independently of the FF combustion control, by performing the FB combustion control according to the difference between the actual temperature of the hot water in the hot water tank and the target maintenance temperature, the hot water in the hot water tank can be more reliably targeted. It can be stably maintained near the maintenance temperature. Thereby, a good and stable hot water supply can be secured. According to the hot water supply device of the fourth aspect , the configuration according to any one of the first to third aspects is provided.
In addition to the above effects, a hot water supply path dedicated to the bathtub is provided which is branched from the middle of the hot water supply path.
Control configuration Oite controls to difference little flow hot water after the water when performing pointing water constant amount of water to Nuruku the bath temperature as one of the bath hot water supply function for hot water to the bathtub through the since a was, the hot water supply heat exchanger water passage therethrough of hot water of the hot water storage tank as a heat exchange medium using a water heater system for heating the heat exchange, even when performing pointing water to the bathtub By flowing a little hot water after water supply, the water in the hot water supply path can be replaced with hot water, so that at the next hot water supply operation, the hot water of the set hot water Can be supplied. And, of course, it is possible to prevent the hot water from circulating toward the bypass and warming during the hot water supply standby, and to prevent the temperature in the hot water supply passage from rising to a high temperature.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply apparatus according to an embodiment of the present invention.

FIG. 2 is a temperature control flow chart of hot water in a hot water storage tank of the combustion can body according to the embodiment of the present invention.

FIG. 3 is a control flowchart illustrating another embodiment of the present invention.

[Explanation of symbols]

10. Combustion can body 11 Combustion chamber 12 Hot water storage tank 12a Hot water storage temperature sensor 13 Oil burner 20 Hot water supply circuit 21 Waterway 21a Incoming water temperature sensor 21b Incoming water flow sensor 22 Heat exchange coil for hot water supply 23 Deyuro 24 Bypass Road 25 Hot water mixing means 26 Hot water supply channel 26a Hot water supply temperature sensor 27 Hot water path for bathtub 28 Total flow control means 29 Hot water supply terminal 30 Circulation circuit for bath reheating 40 heating circuit 50 Controller 61 Remote control for hot water supply 62 bath remote control 63 heating remote control

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masamichi Tanaka 93rd Edocho, Chuo-ku, Kobe City, Hyogo Pref. (72) Inventor Akira Kidowaki 93rd Edocho, Chuo-ku, Kobe-shi, Hyogo Pref. 72) Inventor Kazunori Hasegawa 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref. (72) Inventor Takayuki Ueda 93 Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref.Noritsu Co., Ltd. (72) Inventor Yoshihide Nakajima Hyogo, Japan 93, Edo-cho, Chuo-ku, Kobe-shi (72) Inventor Hironobu Fujita 93, Edo-cho, Chuo-ku, Kobe-shi, Hyogo Pref. 93 (72) Inventor Yasunari Okuda, 93-edo-cho, Chuo-ku, Kobe, Hyogo Noritsu Co., Ltd. (56) References JP-A-8-100949 (JP, A) JP-A 8-247542 (JP, A) JP-A-7-83456 (JP, A) JP-A-5-87407 (JP, A) JP-A-2-136647 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24D 3 / 08 F23N 5/00 F24D 17/00 F24H 1/00 602 F24H 1/18 302

Claims (4)

(57) [Claims] 1. A combustion can body provided with a hot water tank as a heat exchange medium tank, a water inlet passage and a hot water passage of the combustion can body with respect to the hot water storage tank, and the combustion can body has A hot water supply heat exchange unit that is secondarily indirectly heated by hot water, a bypass from the water inlet to the hot water, and a hot and cold water that mixes water from the bypass with hot water from the hot water. A mixing means, a hot water supply path for guiding hot water flowing out of the hot and cold water mixing means further downstream, and a water supply path provided in the hot water supply path.
A flow control means; and a controller.
La, the conjunction instructs the hot and cold water mixing unit, is the water inlet defines a hot and cold water mixing ratio and a detected incoming water temperature and the detected incoming water flow rate detected hot water temperature and the entering-water channel of the tapping channel and set hot water supply temperature
The temperature at which hot water is supplied even when the entire amount of water passed through the hot water supply heat exchange unit
If the water temperature does not reach the set hot water supply temperature, the total flow rate
Water is supplied at the set hot water supply temperature with the total flow rate
Command to narrow down to a flow rate that can be controlled
A hot water supply device characterized by having a control configuration that performs the control . 2. The controller according to claim 1 , wherein the temperature of the hot water storage tank is a target temperature.
Combustion cans to be maintained within a certain temperature range, including the holding temperature
The hot water supply apparatus according to claim 1, wherein a control structure for controlling combustion in a body is provided. 3. The controller according to claim 1, wherein the controller is configured to supply water flowing through the hot water storage tank.
Feed forward according to the amount of heat exchange heat required by
Combustion control, target maintenance temperature of hot water in hot water tank and actual temperature
Feedback combustion control according to the difference between
Control combustion in a combustion can using one or both
3. The control system according to claim 2, wherein
Water heater. 4. A bathtub-only supply branched from the middle of the hot water supply path.
A hot water path, and the controller is connected to the hot water path dedicated to the bathtub.
Bathtub as one of the bathtub hot water supply functions to supply hot water to the bathtub
When performing a certain amount of water supply to warm the temperature
Then, control the hot water to flow a little after the watering
4. A control structure according to claim 1, wherein:
Hot water supply apparatus according to.