JPS6123261Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a water heater that uses a central controller to set the temperature of hot water at different temperatures and to change the heat generation capacity accordingly.

With conventional water heaters, the power is on for a certain amount of time late at night, so the heating capacity of the heating element can be adjusted to meet the winter conditions when hot water consumption is high. It is set to increase. For this reason, in summer when the amount of hot water used is low, more than half of the amount of hot water stored in the hot water storage tank often remains. I get tired. Not only does this lead to concentration of the current load and reduce power transmission efficiency, but it also boils up in a short time, meaning that hot water at an unnecessarily high temperature is left unused for a long time, resulting in large heat loss. It was hot.

As a countermeasure for this, products with a built-in switch that can be used to set the boiling water temperature or heat generation capacity to a lower level during the summer when the amount of hot water used is low are being considered, but it is not expected that individual users will be able to switch the settings. There were also some difficult aspects.

The present invention was developed in view of the above points, and by configuring the hot water temperature setting and heat generation capacity of multiple water heaters to be variable by a central control device,
This solves the above-mentioned conventional disadvantages.

The embodiments of the present invention will be described above based on the drawings.
In the figure, 1a and 1b are water heaters installed in each home such as an apartment, 2 is a late-night power supply of about 200 VAC, and 3a and 3b are water heaters 1a and 1b with a late-night power supply.
A time switch that connects electrically at midnight, 4
a, 4b, 5a, 5b are electric heaters as heating devices for hot water storage; 6a, 6b are electric heaters 4 as means for setting the boiling water temperature of the water heaters 1a, 1b;
7a and 7b are automatic temperature regulators connected in series via electric contactors 9a and 9b, which will be described later, to open at a hot water temperature of 85°C; Automatic temperature controllers 8a and 8b that open at ℃ are electric contactors 10a and 1 which will be described later.
This is an automatic temperature controller that opens at a hot water temperature of 85°C, which is connected in parallel to automatic temperature controllers 7a and 7b via 0b. Together with 10b, it acts as a hot water temperature setting means. 9a and 9b are electromagnetic contactors, and 10a and 10b are electromagnetic contactors, which constitute a variable mechanism that varies the heat generating capacity similarly to the electromagnetic contactors 9a and 9b. 11a, 11b are excitation coils that close the electromagnetic contactors 9a, 9b, 10a, 10b when excited, and 12 are electromagnetic contactors 9a, 9b, 10.
Electric heaters 4a, 4 through opening and closing of a, 10b
b, 5a, 5b and automatic temperature controllers 6a, 6
13 is a power source for operating the central controller 12; 14 is an operating switch; 15 is an excitation coil that is energized when the operating switch 14 is closed; , 16
a and 16b are electromagnetic contactors that are closed by excitation of the excitation coil 14; 17a and 17b are excitation coils 11;
This is a cable that connects the terminals a and 11b to the power supply 13 via the electromagnetic contactors 16a and 16b.

In a water heater having such a configuration, when the operation switch 14 of the central control device 12 is closed, for example in winter when hot water is used in large quantities, the excitation coil 15 is excited and the electromagnetic contactors 16a and 16b are closed. Then, the excitation coils 11a, 11b are excited by the power supply 13 via the electromagnetic contactors 16a, 16b, and the electromagnetic contactors 9a, 9b, 10a, 10b are closed.
By this closing, the automatic temperature regulators 6a, 6b, 8a, 8b, which open when the water temperature is 85°C, are connected to the electric heaters 4a, 8a, 8b.
4b, 5a, and 5b in series. Therefore, if the time switches 3a, 3b are closed at midnight, the electric heaters 4a, 4b, 5a, 5b are connected to the power source 2 late at night, and the water heaters 1a, 1b are heated to a very high boiling temperature at the set water temperature of 85°C. Performs hot water storage operation with fast rising characteristics.

On the other hand, in summer when the amount of hot water used is low, when the operation switch 14 of the central control device 12 is opened, the excitation coil 15 is not excited, so the electromagnetic contactor 16
a, 16b are opened, exciting coils 11a, 11b
is not excited and the electromagnetic contactors 9a, 9b, 10a, 1
0b opens. As a result, the electric heaters 4a, 4
b is cut off from the power supply 2 late at night, and the electric heaters 5a,
Automatic temperature controller 7 that only 5b opens when the water temperature is 65℃
It is electrically connected in series only to a and 7b. Therefore,
Similarly to the above, when the time switches 3a and 3b are closed, the water heaters 1a and 1b are forced to store hot water at a set temperature of 65 DEG C. and have a slow boiling characteristic.

In the above embodiment, the hot water temperature setting and the heat generation capacity are manually switched by the central control device, but it may be configured to switch automatically depending on the water supply temperature. Furthermore, although an electric heater was used as a heat generating device for hot water storage, combustion devices equipped with fuel control valves such as electromagnetic valves that control ignition by opening and closing these automatic temperature regulators and adjust the fuel cost supplied by a central control device may also be used. Good things are obvious.

As explained above, according to the present invention, the hot water temperature setting of multiple water heaters and the heat generating capacity of the heat generating device can be varied by the central control device, so it can be adjusted according to the season when the amount of hot water used differs. It is possible to control the heat generation capacity that determines the hot water storage temperature and boiling characteristic performance, and it is possible to significantly reduce natural heat dissipation loss due to neglect, for example in the summer. This also provides the advantage of being able to enjoy a wide range of energy-saving effects.

[Brief explanation of the drawing]

The figure is a schematic control circuit diagram of a water heater that is an embodiment of the present invention. 1a, 1b...Water heater, 4a, 4b, 5a, 5
b...Electric heater, 6a, 6b, 7a, 7b, 8
a, 8b... Automatic temperature controller, 9a, 9b, 10
a, 10b, 16a, 16b...magnetic contactor, 1
1a, 11b, 15...excitation coil, 12...central control device, 14...operation switch.

Claims (1)

[Scope of utility model registration request] Each of the plurality of water heaters is provided with a plurality of heat generating devices for storing hot water, and a means for making the heat generating capacity of the heat generating device variable and controlling the operation of the heat generating device to set a plurality of different hot water temperatures, A control device for a water heater, comprising a central control device that centrally controls the means to switch between the heat generating capacity and the set temperature.