JPH09170814A - Boil-up system of calorifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reliably a boiling up of a hot water storage tank of each unit while realizing the unit of the hot water storage tank highly transportable with a higher freedom of installation. SOLUTION: In this calorifier, more than two hot water storage tanks 1a-1d are so arranged to be divided into more than one units and the individual hot water storage tanks are used in a linkage. In the system of the apparatus, heating bodies 2a-2d are provided to boil up the individual hot water tanks 1a-1d, hot water temperature detection means 4a-4d to detect the temperature of hot water in the hot water storage tanks 1a-1d, a heating body control means to control the heating bodies 2a-2d in the respective hot water storage tanks 1a-1d by the temperature of hot water detected by the hot water temperature detection means 4a-4d and a control means to control the sequence of the electric energization of the plurality of heating bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiling system for a water heater, and more particularly to a boiling system for a water heater of a so-called connected tank system, which is composed of a plurality of hot water storage tanks, and is used in cooperation with each other. The present invention relates to a boiling system when a tank is divided into a plurality of units.

Further, in the boiling when the energizable time is limited, such as in the midnight power system, the boiling target hot water temperature is dynamically changed by the remaining energizable time, the hot water temperature in each tank, and the residual hot water. The present invention relates to a control system for selecting a tank to be boiled by changing it, and particularly to a control system effective even when hot water is collected during the boiling time.

[0003]

2. Description of the Related Art FIG. 8 is a block diagram of a four-connected tank according to the prior art. In the figure, 1a to 1d are hot water storage tanks, 2a to 2d are heating elements, and hot water storage tanks 1a to 1d, respectively.
Boil the water in 1d. The heating capacities of the heating elements 2a to 2d are set to the amount of heat required to boil the entire tank, and as a whole, two or more heating elements cannot be energized at the same time. Reference numerals 3a to 3d are electromagnetic relays for controlling on / off of the heating elements 2a to 2d, and reference numerals 4a to 4d are hot water temperature detection thermistors for detecting hot water temperatures in the hot water storage tanks 1a to 1d. 7a-7
Reference numeral d denotes an electromagnetic relay configured so that two or more heating elements are not energized at the same time. 8 is a control board, 9 is a remote controller,
10 is a remote control connection cable. 12 is a water supply port, 1
Reference numeral 3 denotes a pressure reducing valve, which escapes the expansion water at the time of boiling and prevents the pressure in the tank from rising. Reference numeral 16 denotes a hot water supply port, which is connected to a faucet or the like and collects boiled hot water.

FIG. 9 is a control block diagram of this conventional example.
In the figure, 2a to 2d are heating elements, 3a to 3d are electromagnetic relays for turning on / off the heating elements, 4a to 4d are temperature detection thermistors, and 7a to 7d are configured so that two or more heating elements are not energized at the same time. It is an electromagnetic relay.

Only when the electromagnetic relay 7a is excited, either heating element is energized. Electromagnetic relay 7a
When 7b and 7d are excited, the electromagnetic relay 3a is excited and the heating element 2a is energized. Electromagnetic relay 7a
When 7b is excited and the electromagnetic relay 7d is not excited, the electromagnetic relay 3b is excited and the heating element 2b is energized. When the electromagnetic relay 7a is excited and the electromagnetic relay 7b is not excited, and when the electromagnetic relay 7c is excited, the electromagnetic relay 3c is excited and the heating element 2c is energized. Electromagnetic relay 7a is excited, electromagnetic relay 7b
When the 7c is not excited, the electromagnetic relay 3d is excited and the heating element 2d is energized. Therefore, two or more heating elements are not energized at the same time.

Reference numeral 8 is a control board, 9 is a remote controller, and 10 is a remote controller cable. 18 is a microcomputer, 1
Reference numeral 9 is an A / D conversion circuit that takes in the temperature detected by the temperature detection thermistor to a microcomputer, and 20 is a remote controller 9
And a heater control circuit 22 for controlling the electromagnetic relays 7a-7b.

FIG. 10 shows a control flowchart of a conventional example. After starting the microcomputer (step S71), confirm that the power for boiling is turned on (step S7).
2) Initialize and operate the internal timer (step S7)
3). Next, the boiling water temperature T from the remote control communication circuit 20.
m is read (step S74), and the detected hot water temperature Ta and temperature detection thermistor 4b in the temperature detection thermistor 4a
In step S75, the detected hot water temperature Tb, the hot water temperature Tc detected by the temperature detecting thermistor 4c, and the hot water temperature Td detected by the temperature detecting thermistor 4d are read (step S75).

Next, the hot water storage tank 1a is first boiled. The hot water temperature Ta detected by the temperature detection sensor 4a detected in step S75 is compared with the boiling water temperature Tm-10 ° C read from the remote controller in step S74 (step S74).
76), if Ta <Tm-10, the heating element 3a is energized (step S77). When Ta <Tm-10 is not satisfied,
Hot water temperature Ta detected by the temperature detection sensor 4a and boiling water temperature Tm
Are compared (step S78), and when Ta <Tm, it is confirmed whether the heating element 3a is currently energized (step S7).
9). When the heating element 3a is energized, the heating element 3a is continuously energized (step S77).
When the hot water storage tank 1a has not been energized, it is determined that the hot water storage tank 1a has been boiled and the hot water storage tank 1b is boiled. Similar control is performed for hot water storage tank 1b, hot water storage tank 1c,
The hot water storage tanks 1d are sequentially processed, and when all the hot water storage tanks are boiled, the power supply to the heating elements is stopped (step S84). This operation is performed until the built-in timer exceeds 8 hours (step S85), and when the built-in timer passes 8 hours, the operation ends (step S86).

FIG. 11 is a time chart of this conventional example. In the figure, the polygonal lines 1a to 1d indicate the boiling water temperature change in the hot water storage tank, and the polygonal lines 2a to 2d are
The electricity supply state to the heating elements 2a to 2d is shown. After starting the energization, first, the heating element 2a is energized to boil the hot water in the hot water storage tank 1a. When the hot water in the hot water storage tank 1a has boiled, the heating element 2b is switched on to boil the hot water in the hot water storage tank 1b. Similarly, the heating element 2c and the heating element 2d are sequentially energized to boil the hot water in the hot water storage tank 1c and the hot water storage tank 1d, and when the whole is boiled, the boiling is finished.

[0010]

Because of the above-described structure, only one of the four heaters can be energized at the same time, and the structure is such that a plurality of heaters are not energized at the same time. It was necessary to control the four heaters with one control board. For this reason, when four tanks are stored in one unit, the dimensions of the unit are wide, the portability is poor, and a continuous space is required for installation, which limits the freedom of installation location. Was there.

In order to solve these inconveniences, for example, when two units of two tanks are arranged side by side to realize a tank of four connection type, a sensor such as a thermistor and a heater are provided between the units. The wiring for control had to be bridged, and the wiring was troublesome.

Further, for example, when hot water is taken while the tank 1c is being boiled, the hot water in the tank 1b is supplied to the tank 1a, and the water not boiled from the tank 1c is supplied to the tank 1b. , The temperature of the hot water in the tank 1b drops. Therefore, the energization of the heating element 2c is switched to the energization of the heating element 2b, and the hot water in the tank 1b is boiled. However, since the tank 1b should be boiled originally, but the tank 1b is boiled, the tank 1d is not sufficiently energized by the end of the boiling and there is a problem that the tank 1d remains water. is there.

The present invention is intended to solve such a problem.

A first aspect of the present invention is to obtain a boiling system of a water heater which can realize a unit having good transportability and a high degree of freedom in installation and capable of accurately boiling the hot water storage tank of each unit. Is.

A second aspect of the present invention is to provide a boiling system of a water heater which can realize a unit which is easy to carry and has a high degree of freedom in installation and which can more accurately boil the hot water storage tank of each unit. It is a thing.

A third aspect of the present invention is to provide a boiling system of a water heater which can realize a unit having good transportability and a high degree of freedom in installation, and which can more accurately boil the hot water storage tank of each unit. It is a thing.

A fourth aspect of the present invention is to provide a boiling system of a water heater which can realize a unit having good transportability and a high degree of freedom in installation, and which can more accurately boil the hot water storage tank of each unit. It is a thing.

A fifth aspect of the present invention relates to a water heater which has good transportability, has a high degree of freedom in installation, can realize a plurality of units each having a control board, and can appropriately boil the hot water storage tank of each unit. It is intended to obtain a boiling method.

A sixth aspect of the present invention relates to a water heater which has good transportability, has a high degree of freedom in installation, can realize a plurality of units each having a control board, and can appropriately boil the hot water storage tank of each unit. It is intended to obtain a boiling method.

A seventh aspect of the present invention relates to a water heater which has good transportability, has a high degree of freedom of installation, can realize a plurality of units each having a control board, and can appropriately boil the hot water storage tank of each unit. It is intended to obtain a boiling method.

An eighth aspect of the present invention is a boiling system for a water heater, which can realize a unit that is highly transportable and has a high degree of freedom in installation, and that can properly boil the hot water storage tank of each unit according to the hot water temperature. It's about to get.

A ninth aspect of the invention is to realize a unit having good transportability and a high degree of freedom of installation, and capable of accurately boiling the hot water storage tank of each unit according to the remaining hot water amount and the hot water temperature. It is the one that tries to obtain the raising method.

[0023]

Means for Solving the Problems In the first invention,
A hot water tank of 3 or more hot water storage tanks, and a hot water tank of a connected tank system in which the hot water storage tanks are divided into two or more units, and each hot water storage tank is connected and used. By the hot water temperature detecting means for detecting the hot water temperature in the hot water storage tank and the hot water temperature detected by the hot water temperature detecting means
Heating element control means for controlling the heating element in each hot water storage tank,
A control means for controlling the order of energization of the plurality of heating elements is provided.

In the second invention, a first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and A heating element for boiling up each hot water storage tank, a hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, and a heating element control for controlling the heating element of each hot water storage tank according to the hot water temperature detected by this hot water temperature detecting means And means for selectively energizing a plurality of hot water storage tanks in each unit.

In the third invention, the first unit having the first and second hot water storage tanks, and the third and fourth units
A second unit having a hot water storage tank for supplying hot water in cooperation with the first unit, a heating element for boiling each hot water storage tank, and hot water temperature detection means for detecting the hot water temperature of each hot water storage tank, A heating element control means for controlling the heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detection means is provided, and a control means for selectively energizing a plurality of hot water storage tanks in each unit is provided. .

In the fourth invention, the first unit having the first and second hot water storage tanks, and the third and fourth units
A second unit having a hot water storage tank for supplying hot water in cooperation with the first unit, a heating element for boiling each hot water storage tank, and hot water temperature detection means for detecting the hot water temperature of each hot water storage tank, A heating element control means for controlling the heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detecting means, and when the first and third hot water storage tanks are energized to boil these hot water storage tanks. The second and fourth hot water storage tanks are provided with a power supply control means for switching the power supply and controlling the hot water storage tanks to boil.

In the fifth invention, a first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and A heating element for boiling up each hot water storage tank, a hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, and a heating element control for controlling the heating element of each hot water storage tank according to the hot water temperature detected by this hot water temperature detecting means And a power supply control means for selectively supplying power to a plurality of hot water storage tanks in each unit, and a control board including the heating element control means and the power supply control means is provided for each unit.

In the sixth invention, a first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and A heating element for boiling up each hot water storage tank, a hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, and a heating element control for controlling the heating element of each hot water storage tank according to the hot water temperature detected by this hot water temperature detecting means Means and an energization control means for selectively energizing a plurality of hot water storage tanks in each unit, and a control board including the heating element control means and the energization control means is provided for each unit, and An inter-unit communication circuit is provided between the control boards.

In the seventh invention, the boiling temperature common to each unit is communicated by the inter-unit communication circuit provided between the control boards.

In the eighth aspect of the present invention, there are provided three or more hot water storage tanks and a hot water tank of a connected tank system in which the hot water storage tanks are connected to each other. Hot water temperature detecting means for detecting the hot water temperature in the inside, heating element control means for controlling the heating element in each hot water storage tank by the hot water temperature detected by the hot water temperature detecting means, and the order of energization of the plurality of heating elements In a water heater equipped with a control means for controlling, a boiling method of an energization control method that controls the completion of boiling to the end of the time within a limited time such as the midnight power supply time zone. Therefore, the tank to be boiled is selected by dynamically changing the target boiling water temperature from the remaining time and the water temperature in each tank.

In the ninth aspect of the present invention, there are three or more hot water storage tanks and a hot water tank of a connected tank type in which the hot water storage tanks are connected to each other. Hot water temperature detecting means for detecting the hot water in the tank, residual hot water amount detecting means for detecting the residual hot water amount in each tank, and heating element control for controlling the heating element in each hot water storage tank by the hot water detected by the hot water temperature detecting means Means and a water heater provided with a control means for controlling the order of energization of the plurality of heating elements, in the limited time such as the midnight power supply time zone, the completion of boiling is the last in that time. It is a boiling method of energization control method that controls so that a boiling tank is selected by dynamically changing the boiling target hot water temperature from the remaining time, the amount of remaining hot water in each tank, and the hot water temperature. I did it.

The embodiment of the present invention has the following specific solving means. In the embodiment of the present invention, for example, in the case of a four-connection tank, by arranging two units of two tanks side by side, a unit having good transportability and a high degree of freedom in installation is realized. For this reason, for example, in the case where a four-connection tank is composed of two units of two tanks,
By halving the amount of heat generated per heating element,
Up to two heating elements can be energized at the same time, and each unit is heated independently.

Also, in consideration of hot water being taken during boiling, the boiling tank is selected by dynamically changing the remaining boiling time and the hot water temperature and amount of remaining hot water in each tank. Then, control is performed so that hot water is stored in all tanks as much as possible.

In the boiling method according to the present invention, the control boards in the two units are connected to each other by a communication cable to perform communication so that the boiling water temperatures are the same, and the power consumption as a whole is below a certain level. Since the control system is configured to be configured as described above, it is possible to divide the four hot water storage tanks into two units, for example, so that a unit that has good transportability and a high degree of freedom in installation can be realized.

Further, by dynamically changing the boiling water temperature in accordance with the remaining time that can be boiled, the hot water temperature in each hot water storage tank, and the amount of remaining hot water, it is possible to take hot water during boiling. , In each hot water storage tank, it is possible to reduce the situation where one tank boils up, while the other tank remains water, so that all tanks boil up at moderate water temperatures.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 shows an embodiment of the present invention. In this embodiment, two units of two tanks are connected in series and four units are connected. In FIG. 1, 1a to 1d are hot water storage tanks, and 2a to 2d are heating elements, and boil the hot water in the hot water storage tanks 1a to 1d, respectively. The heating capacities of the heating elements 2a to 2d are set to half of the heating value required to boil the entire tank, and as a whole, the two heating elements can be energized. 3a to 3d are electromagnetic relays for controlling on / off of the heating elements 2a to 2d, and 4a to 4d are hot water storage tanks 1a to 1d.
It is a hot water temperature detection thermistor that detects the hot water temperature inside. 5a ~
Reference numeral 5d is an electromagnetic relay configured so that three or more heating elements are not energized at the same time. In this embodiment, the heating element 2a
And 2b constitute the electromagnetic relays 5a and 5b so that they are not energized at the same time, and the electromagnetic relays 5c and 5d are constructed so that the heating elements 2c and 2d are not energized at the same time. I try not to energize. Reference numerals 8a and 8b are control boards, 9 is a remote controller, 10 is a remote controller connecting cable, and 11 is an inter-unit communication cable. Reference numeral 12 is a water supply port, and 13 is a pressure reducing valve, which keeps the pressure in the hot water storage tank below a certain value. 14a and 14b are relief valves, which allow the expanded water at the time of boiling to escape and prevent the pressure in the tank from rising. 15 is a connecting pipe between the units,
Reference numeral 16 denotes a hot water supply port, which is connected to a faucet or the like and collects boiled hot water.

FIG. 2 is a control block diagram of this embodiment.
In FIG. 2, 2a to 2d are heating elements, 3a to 3d are electromagnetic relays for turning on / off the heating elements, 4a to 4d are temperature detection thermistors, and 5a to 5d are designed so that three or more heating elements are not energized at the same time. It is a configured electromagnetic relay.

When both the electromagnetic relay 5a and the electromagnetic relay 5b are excited, the electromagnetic relay 3a is excited and the heating element 2a is energized. When the electromagnetic relay 5a is excited and the electromagnetic relay 5b is not excited, the electromagnetic relay 3b
Is excited and the heating element 2b is energized. Electromagnetic relay 5b
Is a switching type contact, the electromagnetic relay 3a and the electromagnetic relay 3b are not simultaneously excited, and the heating element 2a and the heating element 2b are not energized at the same time. Similarly, when both the electromagnetic relay 5c and the electromagnetic relay 5d are excited, the electromagnetic relay 3c is excited and the heating element 2c is energized. When the electromagnetic relay 5c is excited and the electromagnetic relay 5d is not excited, the electromagnetic relay 3d is excited and the heating element 2d
Is energized. Since the electromagnetic relay 5d is a switching type contact, the electromagnetic relay 3c and the electromagnetic relay 3d are not simultaneously excited, and the heating element 2c and the heating element 2d are not energized at the same time. Further, since the electromagnetic relays 5a and 5b and the electromagnetic relays 5c and 5d operate independently, one of the heating element 2a, the heating element 2c and the heating element 2d, or the heating element 2
b and either one of the heating element 2c and the heating element 2d can simultaneously be energized, and as a whole, up to two heating elements can be energized at the same time.

Control boards 8a and 8b, remote controller 1
Reference numeral 0 is a remote control cable, and 11 is a communication cable between the units. The control boards 8a and 8b have the same structure. 1
8a and 18b are microcomputers, and 19a and 19b
Is an A-D conversion circuit for fetching the temperature detected by the temperature detection thermistor into the microcomputer, 20aa and 20b.
Is a communication circuit with a remote controller, 21a and 21b are communication circuits between units, and 22a and 22b are heater control circuits, which control the electromagnetic relays 5a to 5b.

The control board 8a has a remote controller communication circuit 20.
The remote controller 9 is connected through a and the remote controller communication cable 10. Remote control communication circuit 20 of control board 8b
b and the inter-unit communication circuit 21a of the control board 8a are connected by an inter-unit communication cable. Therefore, the control board 8a behaves like a remote controller with respect to the control board 8b, and the setting and display by the remote controller 9 are controlled by the control board 8b.
Communicate with

FIG. 3 shows a control flowchart of this embodiment. The flowchart is the same for the control boards 8a and 8b. After starting the microcomputer (step S01), confirm that the power source for boiling is on (step S0).
2) Initialize and operate the internal timer (step S0
3). Next, the boiling water temperature Tm is read from the remote control communication circuit (step S04), and the detected hot water temperature Ta by the temperature detecting thermistor 4a (step S05) and the detected hot water temperature Tb by the temperature detecting thermistor 4b are read ( Step S06).

Next, it is confirmed whether communication between units is being performed (step S07). Here, in the case of the hot water supply side unit, since the inter-unit communication is being performed, the boiling water temperature Tm read from the remote control is transmitted to the water supply side unit (step S08). If it is a water supply side unit, do nothing because the inter-unit communication circuit is not working. Since the remote controller communication circuit of the water supply side unit is connected to the inter-unit communication circuit of the hot water supply side unit, the boiling water temperature read in step S04 is
The boiling water temperature of the hot water supply side unit becomes the same, and the boiling water temperature of the hot water supply side unit becomes the same as the boiling water temperature of the water supply side unit.

Next, the value of the hot water temperature Ta detected by the temperature detecting thermistor 4a and the value of the hot water temperature Tb detected by the temperature detecting thermistor 4b are compared with the boiling water temperature Tm read in step S04. First, the temperature detection thermistor 4a
In step S09, the detected temperature Ta in step 1 is compared with a value (Tm-10) lower than the boiling water temperature by 10 ° C., and Ta <
If Tm-10, the electromagnetic relays 5a and 5b are both excited to energize the heating element 3a (step S1).
0). If Ta ≧ Tm−10, Ta and Tm are compared (step S11), and if Tm−10 ≦ Ta <Tm,
If the heating element 3a is being energized (step S12), the heating element 3a is continuously energized (step S10). Tm-10 ≦
Even if Ta <Tm, when the heating element 3a is not energized,
In the case of a> Tm, it is determined that the liquid has once boiled, so the process proceeds to step S13. Then, the temperature detection sensor 4
The detected hot water temperature Tb in b is compared with the boiling hot water temperature. The temperature Tb detected by the temperature detection thermistor 4b is compared with a value (Tm-10) lower by 10 ° C than the boiling water temperature (step S13). If Tb <Tm-10, the electromagnetic relay 5a
Of the heating element 3b without exciting the electromagnetic relay 5b.
Is energized (step S14). If Tb ≧ Tm−10, Tb and Tm are compared (step S15), and Tm
In the case of −10 ≦ Tb <Tm, if the heating element 3b is being energized (step S16), the heating element 3b is continuously energized (step S14). Even when Tm−10 ≦ Tb <Tm, when the heating element 3b is not energized and when Tb> Tm, it is determined that the heating element 3b has once boiled. Therefore, the electromagnetic relays 5a.
b is not excited, and the heating elements 3a and 3b are both deenergized (step S17). This operation is repeated until the built-in timer exceeds 8 hours (step S19).

In the case of the water supply side unit, the hot water temperature detecting thermistor 4a is set to 4c and the hot water temperature detecting thermistor 4b is set to 4d.
By replacing the heat generating element 3a with the heat generating element 3c and the heat generating element 3b with the heat generating element 3d, the same flowchart is used.

FIG. 4 is a time chart in the case of this embodiment. In the figure, the polygonal lines 1a to 1d indicate changes in the boiling water temperature in the hot water storage tank, and the polygonal lines 2a to 2d indicate the energization states of the heating elements 2a to 2d. Where 1
Since a, 1c, 1b, and 1d boil in the same way,
The lines are the same in the figure. After starting the energization, first, the heating elements 2a and 2c are energized to boil the hot water in the hot water storage tanks 1a and 1c. When the hot water in the hot water storage tanks 1a and 1c has boiled, the heating elements 2b and 2d are switched on to boil the hot water in the hot water storage tanks 1b and 1d.
When the hot water inside has boiled, finish boiling.

Embodiment 2 FIG. FIG. 5 shows a control flowchart according to another embodiment of the present invention. Here, the block diagram and the control block diagram of this embodiment are the same as those in FIGS. 1 and 2. In FIG. 5, steps S01 to S07 are the same as those in FIG.
The operation is similar to that of the first embodiment.

When inter-unit communication is performed, that is, in the case of the control board 8a of the hot water supply side unit, the operable remaining time (Hr) is calculated from the internal timer (step S31). For example, the energizable time is 8 hours (= 480
Minute), if the value of the internal timer is 160 minutes, the remaining time (Hr) that can be energized is Hr = 480−160 = 320.
[Minutes]. This remaining time (Hr) and step S05
From the hot water temperature of the temperature detection thermistor read in S06, the hot water temperature to be boiled is obtained by energizing for the remaining time.
Assuming that the capacity of one tank is Q [L] and the heat generation capacity of the heater is P [kW], and it is possible to boil up to Tm [° C] in the remaining time Hr [min], the following formula (1) Like

[0048]

[Equation 1]

When Tm is calculated by back calculation from this, the following expression (2) is obtained (step S32).

[0050]

(Equation 2)

Here, assuming that the minimum hot water temperature that can be used as hot water is 55 ° C., if Tm ≦ 55 ° C. (step S33), Tm is set to 55 ° C. (step S34), and the boiling water temperature is 55 ° C. Do not become less than. Next, the detected hot water temperature (Tc / Td) of the temperature detecting thermistors 4c and 4d of the water supply side unit is received through the inter-unit communication circuit (step S35). The boiling water temperature Tx of the water supply side unit is calculated in the same procedure as steps S32 to S34 (steps S36 to S38), and this hot water temperature is transmitted to the water supply side unit (step S08). Here, since the remote control communication circuit of the water supply side unit is connected to the inter-unit communication circuit of the hot water supply side unit, the boiling water temperature read in step S04 is the same as that of the hot water supply side unit in step S04.
The hot water temperature will be transmitted at 08.

The hot water temperature calculated in steps S33 and S34,
Alternatively, the hot water temperature read in step S04 is compared with the hot water temperature detected by each temperature detecting thermistor to control each heating element (steps S09 to S19). This control method is the same as the flowchart of the first embodiment in FIG.

Here, when hot water is taken during boiling, it may not be possible to obtain the time required to boil up to the set hot water temperature. When hot water is taken during boiling, for example, only the hot water storage tank 1a is boiled and hot water storage tank 1b
It is possible to avoid the state where the water is not boiled, and to boil the hot water storage tanks 1a and 1b so that the hot water is lower than the set hot water temperature, but becomes hot water.

Embodiment 3 FIG. FIG. 6 shows a block diagram of the third embodiment. This is because the amount of remaining hot water in the tank is taken into consideration in the calculation of the boiling water temperature in the second embodiment. In the figure, 1
1 to 16 are the same as the configuration diagram of FIG. 1 shown in the first embodiment, the description thereof will be omitted. 17a / 17b / 17c / 17
Reference numeral d denotes a thermistor attached at an intermediate position of the hot water storage tank, which operates as a residual hot water detection sensor for detecting the amount of residual hot water in each tank.

FIG. 7 shows a control flowchart of the third embodiment. Since steps S01 to S06 are the same as the operation of the first embodiment, description thereof will be omitted. Step S41 ・ S
42, in the case of the hot water supply side unit, the residual hot water sensor 17a
In the case of the water supply side unit, the detected hot water temperature (Tza / Tzb) of 17b is detected by the residual hot water sensors 17c / 17d (Tzc / Tzc / Tzc / Tzb).
Read Tzd).

It is confirmed whether the inter-unit communication is being performed (step S07). When the inter-unit communication is being performed, that is, in the case of the control board 8a of the hot water supply side unit, as in the first embodiment, the internal timer is used. The remaining operable time (Hr) is calculated (step S31). This remaining time (H
r), the hot water temperature of the temperature detection thermistor read in steps S05 and S06, and the residual hot water sensor hot water read in steps S41 and S42, the remaining hot water temperature is energized to obtain the boiling water temperature. The capacity of one tank is Q [L], and the heating capacity of the heater is P [kW]. Further, assuming that the remaining hot water sensor is installed at the position Q0 from the upper part of the hot water storage tank, the remaining time Hr [minutes]
If it is boiled up to m [° C.], the following equation (3) is obtained.

[0057]

(Equation 3)

Therefore, when Tm is obtained by back calculation from this, the following equation (4) is obtained (S43).

[0059]

(Equation 4)

Here, as in Example 1, assuming that the minimum hot water temperature that can be used as hot water is 55 ° C., Tm ≦ 55.
If it is ℃ (step S33), Tm is set to 55 ℃ (step S34) so that the boiling water temperature does not fall below 55 ℃. Next, the detected hot water temperature (Tc / Td) of the temperature detection thermistors 4c and 4d of the water supply side unit (step S4
4) The detected hot water temperature (Tzc · Tzd) of the residual hot water sensor is received through the inter-unit communication circuit (step S45). The boiling water temperature Tx of the water supply side unit is calculated by the same procedure as steps S43 and S33 to S34 (steps S46 and S34).
37 to S38), the hot water temperature is transmitted to the water supply side unit (step S08).

As described above, according to the embodiment of the present invention, for example, the four-connection tank is divided into two units of two tanks, so that the four-connection is combined into one unit. Transportability is better than when
It is possible to increase the degree of freedom of installation location.

As in the second and third embodiments, the boiling water temperature is dynamically calculated from the remaining boiling time during boiling and the hot water temperature of each tank. Therefore, even if hot water is taken during boiling, variations in hot water temperature in each tank are reduced, and one tank is boiled up, but another tank is not left as water.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment according to the present invention.

FIG. 2 is a control block diagram of a first embodiment according to the present invention.

FIG. 3 is a flowchart of the first embodiment according to the present invention.

FIG. 4 is a time chart diagram of the first embodiment according to the present invention.

FIG. 5 is a flow chart of a second embodiment according to the present invention.

FIG. 6 is a configuration diagram of a third embodiment according to the present invention.

FIG. 7 is a flow chart of a third embodiment according to the present invention.

FIG. 8 is a configuration diagram of a conventional example.

FIG. 9 is a control configuration diagram of a conventional example.

FIG. 10 is a flowchart of a conventional example.

FIG. 11 is a time chart diagram of a conventional example.

[Explanation of symbols]

1 hot water storage tank, 2 heating element, 3 heating element control relay,
4 temperature sensor, 5 electromagnetic relay, 7 electromagnetic relay, 8
Control board, 9 remote control, 10 remote control cable, 1
1 communication cable between units, 12 water inlet, 13 pressure reducing valve, 14 relief valve, 15 connecting pipe, 16 hot water inlet, 1
7 residual hot water sensor, 18 microcomputer, 19 A-D conversion circuit, 20 remote control communication circuit, 21 inter-unit communication circuit, 22 heater control circuit.

Claims (9)

[Claims] 1. A water heater of a system in which three or more hot water storage tanks and the hot water storage tank are divided into two or more units, and each hot water storage tank is used in association with each other. And a hot water temperature detecting means for detecting the hot water temperature in each hot water storage tank, a heating element control means for controlling the hot water heating element in each hot water storage tank by the hot water temperature detected by the hot water temperature detecting means, and a plurality of heat generations thereof. A boiling system of a water heater provided with a control means for controlling the order of energization of the body. 2. A first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and boiling each hot water storage tank. A heating element to be raised, a hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, and a heating element control means for controlling the hot water heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detecting means, A boiling system for a water heater characterized in that an energization control means for selectively energizing a plurality of hot water storage tanks in each unit is provided. 3. A first unit having first and second hot water storage tanks, and a second unit having third and fourth hot water storage tanks for supplying hot water in cooperation with the first unit. A heating element for boiling each hot water storage tank, a hot water temperature detection means for detecting the hot water temperature of each hot water storage tank, and a heating element for controlling the heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detection means. A boiling system for a water heater, comprising: a control means, and an energization control means for selectively energizing a plurality of hot water storage tanks in each unit. 4. A first unit having first and second hot water storage tanks, and a second unit having third and fourth hot water storage tanks for supplying hot water in cooperation with the first unit. A heating element for boiling each hot water storage tank, a hot water temperature detection means for detecting the hot water temperature of each hot water storage tank, and a heating element for controlling the heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detection means. Control means, and the first and third
When the hot water storage tanks are energized to boil these hot water storage tanks, an energization control means is provided for controlling the second and fourth hot water storage tanks so as to boil these hot water storage tanks. A boiling water heating system. 5. A first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and boiling each hot water storage tank. A heating element to be raised, hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, heating element control means for controlling the hot water heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detecting means, and each unit An energization control means for selectively energizing a plurality of hot water storage tanks in each, and a control board including the heating element control means and the energization control means is provided for each unit. Boil method. 6. A first unit having a plurality of hot water storage tanks, a second unit having a predetermined number of hot water storage tanks for supplying hot water in cooperation with the first unit, and boiling each hot water storage tank. A heating element to be raised, hot water temperature detecting means for detecting the hot water temperature of each hot water storage tank, heating element control means for controlling the hot water heating element of each hot water storage tank according to the hot water temperature detected by the hot water temperature detecting means, and each unit An energization control means for selectively energizing a plurality of hot water storage tanks in each is provided, and a control board including the heating element control means and the energization control means is provided for each unit, and the control boards are connected to each other. A boiling system for a water heater characterized in that it is provided with communication means between units. 7. The boiling system for a water heater according to claim 6, wherein the boiling temperature common to each unit is communicated by an inter-unit communication circuit provided between the control boards. 8. A hot water heater of a connected tank system in which three or more hot water storage tanks and each hot water storage tank are connected and used, and a heating element for boiling each hot water storage tank and a hot water temperature in each hot water storage tank are provided. A hot water temperature detecting means for detecting, a heating element control means for controlling a heating element in each hot water storage tank by the hot water temperature detected by the hot water temperature detecting means, and a control means for controlling an order of energization of the plurality of heating elements In a water heater equipped with, during the limited time such as the midnight power supply time zone, the boiling method of the energization control method that controls the boiling completion to the end of the time, the remaining A boiling system for a water heater characterized in that the boiling water is selected by dynamically changing the boiling target water temperature based on the time and the water temperature in each tank. 9. A hot water heater of a connected tank type, in which three or more hot water storage tanks and each hot water storage tank are connected and used, and a heating element for boiling each hot water storage tank and hot water in each hot water storage tank are detected. Hot water temperature detection means, residual hot water amount detection means for detecting the amount of residual hot water in each tank, heating element control means for controlling the heating element in each hot water storage tank by the hot water detected by the hot water temperature detection means, and those A water heater equipped with a control means that controls the order of energization of multiple heating elements, and controls the boiling completion to be the last of the limited time such as the midnight power supply time period. It is a boiling method of energization control method to be performed, characterized in that the tank to be heated is selected by dynamically changing the target boiling water temperature from the remaining time, the amount of remaining hot water in each tank, and the hot water temperature. Boiler system of water heater.