JPS589156Y2 - Surplus power utilization load device - Google Patents

Description

[Detailed Description of the Invention] Conventionally, a hot water storage type electric water heater heats water stored in a tank using a heater, and is used by limiting the amount of hot water supplied.

Generally, when heating an object, the amount of heat stored in the object is expressed as specific heat x specific gravity x temperature difference for a given volume.

Water is the substance with the highest specific heat, but the temperature difference is 100℃
Therefore, when a large amount of hot water is required in a hot water storage type water heater, the volume and weight of the device become large.

On the other hand, instantaneous electric water heaters have a structure in which a heater is installed in the middle of the water supply device and continues to heat the water while it is flowing.Since the water needs to be rapidly heated, the electric capacity of the heater is limited to the storage capacity. Although it is larger than the formula and therefore has a shorter usage time, electrical equipment such as lead-in wires to the home,
It is necessary to change the capacity of time switches, integrated wattmeters, etc. to larger capacities in general.

Therefore, at present, gas combustion types are exclusively used as instantaneous water heaters.

The purpose of this invention is to reduce the volume and weight of a hot water storage type electric water heater as much as possible, to be able to supply a large amount of hot water when necessary, and to be able to use it for electric heating, lighting, etc. in addition to hot water supply. .

To explain the embodiment of the present invention shown in the drawings, reference numeral 1 denotes a power receiving terminal for a power supply voltage of 200 VAC, which is connected to an electric water heater 4 via a time switch 2 and an integrated wattmeter 3.

The time switch 2 is set to close only from 11:00 pm to 7:00 am, for example.

In addition to the heater 7, the electric water heater 4 is equipped with a temperature regulating thermostat 5 in series with the heater 7, which opens at a predetermined temperature, and an overheat prevention contact 6, which opens when the temperature rises abnormally (for example, when the thermostat 5 fails).

An energizing coil X of an electromagnetic contactor is connected in parallel with the heater 7, and a power supply line from the power receiving terminal 1 is connected to the storage battery charging rotation 10 via a contact xb which is closed when the electromagnetic contactor is deenergized.

The output of the circuit 10 is one switching contact 1 of the changeover switch 11.
It is connected to the storage battery 12 via 1b-C.

The storage battery 12 is connected to the other switching contact 11a of the changeover switch 11.
-c, it is connected to each circuit of the heater 13 of the instantaneous electric water boiler and the energizing coil Y of the DC electromagnetic contactor.

Deenergization time line contact Y of coil Y between heater 13 and direct IL
a is connected, and a water flow switch 14 that closes only when water is flowing from the water heater and an overheat prevention contact 15 are connected in series with the coil Y.

A series circuit of a lighting load 16 and an auxiliary switch 17 is further connected in parallel to these mutually parallel circuits.

The charging circuit 10 includes a transformer T, a full-wave rectifier Rf connected to its secondary side, two transistors Trl and Tr2 connected to its output circuit, and a potentiometer resistor 18.

The potential at the sliding point of the resistor 18 and the base-emitter voltage of Tr2 are compared, and when the former is higher than the latter, Tr2 is turned on, thereby turning off Trl, and conversely, when the former is lower than the latter, Tr2 is turned off. Therefore, Tr
l is turned on.

Therefore, when the switch contact 11b-C is closed and the voltage of the storage battery 12 is higher than the expected value, the charging circuit is
When the voltage is lower than the expected value, the charging circuit turns off at Tr.
The circuit is closed through l.

Regarding the operation, when AC 200V is applied to terminal 1 and time switch 2 is closed in the middle of the night, W
A voltage is applied to the heater 7 of the water heater 4 through the HM 3 and the currently closed thermostat 5 and the overheat prevention contact 6, thereby raising the temperature of the water in the tank to hot water.

The capacity of this tank is, for example, 401, which is usually enough for one day's worth of cooking and laundry during the day, and the time required to heat it at night is approximately the entire midnight period under worst-case conditions. or less.

However, if ambient conditions are relaxed or hot water usage is low during the day and there is residual hot water, the system should be turned off well before the end of the midnight period, for example after the first 3 to 4 hours of electricity in some cases. The temperature of the water in the tank has already reached a predetermined value, the thermostat 5 is turned off, and the heater 7 is de-energized.

When the thermostat 5 is opened, the coil X is deenergized together with the heater 7, so the contact xb, which has been open until now, is closed and the voltage at the terminal 1 is applied to the charging circuit 10.

If contacts 11b-C are currently closed, storage battery 12
starts charging, and when the charging voltage reaches the expected value, T
Charging ends automatically when RL is turned off.

Assuming that the storage battery 12 is in a charged state, if the daytime switch 11 is switched to the a - c side, when it is desired to use the instant water heater 13 at any time, the switch 14 will be closed by running water, and the coil Y will be energized. Contact Ya closes, energizing the heater 13, and hot water becomes available in a short time.

Also, when the switch 17 is closed as necessary, the lighting load 16
It is also possible to use

Furthermore, if a circuit for an electric heater is connected separately, it can be used at any time.

As a modification, it is also possible to install a small-capacity electric water heater, for example, about 10 liters, in place of the instantaneous electric water heater 13.

In this case, if the electrical capacity of the water heater heater is made relatively large, hot water can be prepared in a short time, and since the power source is a storage battery, it can withstand rapid discharge.

In this case, it is necessary to use a normally closed thermostat similar to the contact point 5 in place of the water flow switch 14.

According to the present invention, it is possible to use late-night electricity until after the thermostat of a normal electric water heater is turned off during late-night hours, so it is possible to reduce fluctuations in the late-night electricity load.
On the other hand, by installing a secondary surplus power usage load such as an instantaneous electric water heater, the capacity of the electric water heater, which is the primary surplus power usage load, can be made smaller than that of the conventional one. It has the effect of making it possible to rapidly supply hot water like a water heater, and also making it possible to use electric heating, lighting, etc. in addition to hot water supply.

[Brief explanation of the drawing]

The drawing is a circuit diagram of the device according to the invention. 1: Power receiving terminal, 2: Time switch, 4: Electric water heater,
5: Thermostat, 6.15: Overheat prevention contact, 7:
Heater, 10: Charging circuit, 12: Storage battery, 13: Instantaneous electric water heater, 14: Running water switch.

Claims (1)

[Scope of utility model registration request] A primary surplus power usage load such as a relatively large capacity electric water heater is connected to the receiving line that receives power only during the scheduled time period through a contact point that passes through the desired operation completion time, and an electric contactor is connected in parallel with the load. Connect the energizing coil, connect the power receiving wire to the electric contactor through the contact that closes when de-energized and the storage battery charging circuit, and then connect the storage battery through one switching contact of the changeover switch, and connect the storage battery through the other changeover contact. A surplus power utilization load device that is connected to a secondary surplus power utilization load such as an instantaneous electric water heater that requires rapid heating with a relatively small capacity.