JPH03291455A - Centralized controller for electrical hot water heater - Google Patents

Abstract

PURPOSE:To perform an efficient centralized control without exerting burden on maintenance man and eliminate a large sized power supply facility by a method wherein a dwelling starting date is set in advance, an electrical energization of an electrical hot water heater for each of the dwelling places is started and a hot water temperature is kept at its boiling temperature at the planned dwelling starting date. CONSTITUTION:An electrical energization starting time setting part 16 may detect a water temperature in a hot water storing tank for a hot water heater 4A with a water temperature sensor 2A in a dwelling place set at a dwelling No. setting part 14. A boiling required time of the hot water heater 4A is calculated in reference to its water temperature and a rated boiling capability of the hot water heater 4A and it is assumed that the hot water is boiled up to a predetermined temperature by the time of dwelling planned date, an electrical energization starting time having an electrical energization starting time dispersed so as not to overlap with the electrical energization for a plurality of hot water heaters and the time is set in a timer 17. The timer 17 operates an electrical energization instruction part 18 when the set time comes and under this instruction, the boiling-up of the hot water heater 4A is started and the boiling-up is already completed at the time when a dwelling person comes and then the hot water temperature is kept at the boiling temperature with the automatic water temperature adjuster.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a centralized control device for electric water heaters that centrally controls electric water heaters that are distributed in a plurality of housing complexes.

[Conventional technology] For example, in non-dwelling apartment complexes such as resort condominiums, the electric water heaters (hereinafter also referred to as water heaters) in each unit are managed by appointing a manager because the residents do not live there full-time. A central control device is installed in the room, and management services are provided by a manager.

For example, when a tenant informs us of the scheduled move-in date and time, the manager operates the central control device to turn on the water heater in the unit in advance, and when the tenant arrives,
Services such as making hot water available immediately will be provided.

FIG. 3 is a block diagram showing the configuration of a conventional central control device for an electric water heater. In the figure, (1a) is the central control device installed in the manager's room, (3) is the control line, (4A) to 4
N) is a water heater installed separately in each house.
When referring to any water heater, it is referred to as water heater (4), (
14) is a dwelling unit number (hereinafter referred to as "No") setting unit provided in the central control device (1a) to designate a dwelling unit to be controlled; (19> is a dwelling unit number);

This is an energization instruction input section that instructs the setting section (14) to start and stop energizing the water heater (4) of the dwelling unit.

Fig. 4 is a sectional view showing the configuration of a hot water storage type electric water heater which is an example of the water heater (4) shown in Fig. 3, and Fig. 5 is its circuit diagram. In each figure, (5) is a hot water storage tank, (6) is a water supply pipe,
(7) is the hot water pipe, (8) is the hot water tap, (9) is the heating element, (
10) is an automatic water temperature controller, (12) is a power switch, (
13) is a power source, and the power switch (12) is activated by a command from the energization instruction input section (19) via the control line (3).
It is connected to the central control device (1a) so that it can be turned on and off.

Next, the operation will be explained. FIG. 6 is a flowchart showing the operation, and in the figure, (S1) to (S4) indicate each step, respectively.

In step S1, when the tenant informs the manager of the scheduled move-in date and time, the manager checks the housing unit number of the resident who contacted him and sets the housing unit number in the housing unit number setting section (14). S2), connect the control line (3) between the central control device (1a) and the water heater (4) of the dwelling unit. Then, the energization instruction input unit (19) is operated to send an instruction to start energization to the control line (3) (step S3). In response to this instruction to start energizing, the power switch (12) of the water heater (4) of the dwelling unit is turned on (step S4), and the heating element (9) is turned on (step S4).
) is energized, and boiling of the water supplied to the hot water tank (5) is started.

In addition, in a typical hot water storage type water heater, water at a temperature of about 10'C supplied to the hot water storage tank (5) heats up to about 85 degrees after being energized for 8 hours.
The rating of the heating element (9) is set so as to boil the water to a temperature of In homes, late-night electricity is used to heat the water, but in resort condominiums, etc., late-night electricity is not used so that the boil can be heated at any time of the day you move in, and therefore the heating element (9) is energized. Boiling starts immediately, and when the water temperature in the hot water storage tank (5) reaches 85°C with the automatic water temperature regulator (10), electricity is stopped.After that, whenever the water temperature drops below a certain level, the heating element (9 ) is repeatedly energized to maintain the temperature of the hot water in the hot water storage tank (5).

Although the initial boiling time varies depending on the water temperature, it takes 6 to 9 hours when there is no remaining hot water in the hot water storage tank (5).

[Problems to be Solved by the Invention] The conventional centralized control device for electric water heaters as described above is configured as described above, and in order to perform optimal control, it is necessary for each resident to It is necessary to start energizing each water heater at the optimal time, taking into consideration the approximately 8 hours of boiling time for each specified move-in time, but it is unreasonable to force the manager to do this. In some cases, the power is turned on earlier than the optimal time, resulting in energy loss due to heat dissipation after boiling, or the power is turned on too late and the boiling is not yet fully completed when the tenant arrives. or occur.

In addition, since electricity is started to be applied to the water heaters in each house without any restrictions, there are problems such as the electricity application times overlap and large-capacity power supply equipment must be provided.

In addition, as prior art related to a control device for an electric water heater, for example, JP-A No. 64-23057 and JP-A No. 60-30
No. 930, JP-A-60-30931, JP-A-59-1
3844, etc., but in all of these, the control means performs control based on the water heater, and it is not possible to select the water heater installed in each dwelling unit and individually control it with a centralized control device. could not.

This invention was made to solve this problem, and it is an electric water heater that can efficiently centrally control water heaters without imposing an unreasonable burden on the administrator, and does not require large power supply equipment. The aim is to obtain a centralized control device for the

[Means for Solving Eight Problems] A central control device for an electric water heater according to the present invention includes a scheduled move-in time setting section that sets the scheduled move-in time for each dwelling unit, and a time required for heating each dwelling unit. The start time calculation unit calculates the energization start time by distributing the energization time to each water heater so as not to energize multiple water heaters at the same time so as not to overlap each water heater. and a timer section, and controls to start energizing the water heater installed in each dwelling unit at the time when electricity starts to be applied to each dwelling unit, and to control the water temperature of the water heater of the dwelling unit to boiling temperature at the time of move-in. This is what we decided to do.

[Function] The electric water heater central control device of the present invention includes a scheduled occupancy time setting section that sets the scheduled occupancy time for each dwelling unit, and a scheduled occupancy time setting unit that calculates the required boiling time for each dwelling unit until the set scheduled occupancy date and time. It is equipped with an energization start time calculation section that calculates the energization start time by distributing the energization time to each water heater so that the energization to multiple water heaters does not overlap on the premise that the water heaters are boiled at the same time, and a timer section. We decided to start energizing the water heaters installed in each dwelling unit at the time when electricity starts for each dwelling unit, and to control the water temperature in the water heater of the dwelling unit to boiling temperature at the time of move-in, so it can be set at any time. By setting the scheduled move-in time for each dwelling unit, power to the water heater will automatically start from the most efficient power-on start time.

[Example] An example of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which the same reference numerals as in FIG. 3 indicate the same or corresponding parts;
1) is the central control device in this embodiment, (2A) to (
2N) is a water temperature sensor, and each water heater (4A) to (
4N), and when referring to an arbitrary water temperature sensor, it is referred to as water temperature sensor (2).

(12A) to (12N) are water heaters (4A) to (12N), respectively.
4N) switch, (15) is the dwelling unit number, setting section (14
), the scheduled move-in date and time setting section inputs the scheduled move-in date and time for the dwelling unit set in ), and (16) is the power supply start time calculation section that calculates the water temperature of the water heater (4) detected by the water temperature sensor (2) and the water temperature of the water heater (4) detected by the water temperature sensor (2). Calculate the required boiling time of the water heater from the rated boiling capacity of 4), and energize multiple water heaters (4) on the premise that the water heater will reach the specified temperature by the scheduled move-in date and time. The energization start time is calculated by distributing the energization times to each water heater (4) so that they do not overlap. (17) is a timer unit that monitors whether the actual time has reached the power supply start time;
18) is an energization instruction unit that issues an instruction to start energization to the corresponding water heater (4) through the control line (3) at the energization start time.

Next, the operation will be explained. FIG. 2 is a flowchart showing the operation of this embodiment.
) indicates each step.

When the tenant informs the manager of the scheduled move-in date and time in step S1, the manager will enter the tenant's housing unit number.
'5: Check and set the target dwelling unit No. 09 (for example, A) in the setting section (14) (step S2), and enter the scheduled move-in date and time (for example, May 3) in the scheduled move-in date and time setting section (15).
PM of the day, 8 o'clock) is set (step S3).

The energization start time calculation unit (16) calculates the dwelling unit number and the setting unit (14).
) The water temperature sensor (2A) of dwelling unit A is set to the water heater (
4A) Step S to detect the water temperature in the hot water storage tank (5)
3) Calculate the required boiling time for the water heater (4A) from the detected water temperature and the rated boiling capacity of the water heater (4A), and set the time required to boil the water heater (4A) by the scheduled move-in date and time (8:00 PM, May 3rd). Calculate the energization start time by distributing the energization time to each water heater (4) so that the energization to multiple water heaters (4) does not overlap on the premise that the water will be boiled to a certain temperature. For example, PM on May 3rd. ,1
time), and this energization start time is set in the timer section (17>) (step 5).

The timer section (17) operates the energization instruction section (18) at 1 o'clock PM on May 3rd (step S6).
), the water heater (4A
) Turn on the power switch (12A) in Step S7)
, May 3rd PM, the water heater (4A) started boiling at 1 o'clock, and by 8 o'clock when the residents arrived, the boiling was already completed, and the automatic water temperature controller (10) brought the water to the boiling temperature. Temperature is maintained.

As described above, efficient services can be provided simply by the manager operating the central control device (1) upon receiving a contact from a resident.

Note that the above series of operations is generally performed by a centralized control device (1
) is executed under program control by a CPU (not shown) provided in the computer.

Next, a case will be described in which the electricity supply to the water heater (4) is stopped. To stop energization, set the dwelling unit number (for example, B) of the dwelling unit you wish to turn off in the dwelling unit number setting section (14), and press the energization stop switch (not shown) attached to the scheduled move-in date and time setting section (15). 1), the direct energization instruction section (18) is operated to turn off the power switch (12B) of the water heater (4B) and stop the supply of power (13).

In the above embodiment, each water heater (4) is equipped with a water temperature sensor (2).
), but for water heaters that do not have a water temperature sensor, a water temperature sensor (2) is installed at one location at the base of the water supply equipment that supplies water to each water supply pipe (6). Control may be performed while detecting the water temperature, and furthermore, a fixed boiling time (e.g., 8 hours) may be determined based solely on the rated water heating capacity of the water heater (4), and centralized control may be performed.

In addition, a water temperature sensor (2) is provided on the water heater (4) itself,
In the case of an electric water heater (4) that sends data on the time required for raising ditches at any time, the energization start time calculation unit (
The function 16) may be a function that simply calculates the energization start time by distributing the energization times to each water heater (4) so that the energization to the plurality of water heaters (4) does not overlap.

[Effects of the Invention] As explained above, in this invention, by setting the scheduled move-in date and time of each dwelling unit at an arbitrary time, power supply to the water heaters of each unit is automatically started from the power supply start time, and the manager can It is possible to perform efficient centralized control service for water heaters without imposing an unreasonable burden on the users, and there are advantages such as not requiring large-capacity power supply equipment.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flow chart showing its operation, Fig. 3 is a block diagram showing a conventional device, and Fig. 4 shows the configuration of a hot water storage type electric water heater. 5 is a sectional view, FIG. 5 is a circuit diagram thereof, and FIG. 6 is a flow chart showing the operation of the conventional device. In the figure, <1) is the central control device, (2A) to (2N)
are the water temperature sensor, (3) is the control line, (4) is the water heater, (5) is the hot water storage tank, (6) is the water supply pipe, and (7) is the water temperature sensor.
) is the hot water pipe, (8) is the hot water tap, (9) is the heating element, (10
) is the automatic water temperature regulator, (12) is the power switch, (13)
) is the power supply, (14) is the dwelling unit number, setting section, (15) is the scheduled move-in date and time setting section, (16) is the power supply start time calculation section, (
17) is a timer section, and (18) is an energization instruction section. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] In a centralized control device for electric water heaters that controls the operation of electric water heaters installed in each dwelling unit using a centralized control device installed at one location, a move-in date and time for each dwelling unit is set. The scheduled date and time setting section and the required boiling time of the electric water heaters installed in each dwelling unit are obtained, and multiple electric water heaters are set on the premise that the boiling time will be reached by the scheduled move-in date and time set in the scheduled move-in date and time setting section. It is equipped with a means for calculating the start time of energization of each electric water heater by distributing the energization time to each electric water heater so that the energization of the water heaters does not overlap, and a timer unit that measures the actual time, so that the scheduled move-in date and time can be determined in advance. By setting this, power will be turned on to the electric water heaters installed in each dwelling unit at the time when the power supply starts for each dwelling unit, and the water temperature in the water heater of each dwelling unit will be brought to a boil at the time of the scheduled move-in date for each dwelling unit. A central control device for electric water heaters that maintains the temperature.