KR910000640Y1 - Storage electric hot-water heater - Google Patents

Abstract

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Description

Regenerative Electric Water Heater

1 is a configuration diagram of the electric water heater of the present invention.

* Explanation of symbols for main parts of the drawings

10: input switching unit 20: control unit

21: low temperature detector 22: high temperature detector

23: circulating temperature sensor 24: hot water temperature sensor

25: low water level sensor 26: electronic thermometer

27: circulation pump 28: heater

29 solenoid valve 41 cold water tank

42: hot water tank 50: heat exchanger

201: electric valve driver 202: heater driver

203: electronic thermometer driving unit 204: circulating pump driving unit

The present invention relates to a regenerative electric water heater, and more particularly, to an induction electric water heater using an inexpensive midnight electric power, which is safe and excellent in performance in response to a new late night electric power bill system.

Under the same power situation in Korea, relatively hot water caused by electricity costs more than oil water heaters, and in consideration of fuel exchange devices, electric water heaters are quite easy to use and efficient, but many restrictions have been followed.

TABLE 1

That is, as shown in Table 1 above, the electric water heater is simpler in structure than other devices when the unit price per KWH is 102.95 based on the conditions using oil, etc., and 210KWH of household power consumption (one month's power consumption). However, even though the system efficiency is relatively high, there is an unreasonable point due to the high fuel cost.

Therefore, these electric water heaters did not reach the level widely used in Korea.

In addition, the electric water heater and the hot water supply device are configured to install a hot water heat exchanger during a refrigerant cycle of a heat pump type chiller unit to supply hot water at the same time as heating and cooling operation.

Under the electricity usage fee system in Korea, water heaters using electricity cost more than water heaters using gas or oil.

Therefore, considering the installation cost, installation area and usability aspects of the hot water device, the electric water heater is simple and convenient, but it is not widely used due to excessive operating cost.

However, in recent years, as the power rate system of Korea is dualized into daytime usage fee and late night usage fee, the use of the above-mentioned late night power can reduce the use cost of electric water heater considerably. The late-night power can be fed to anyone through a separate late-night power supply line through the declaration procedure to the power supply source, that is, KEPCO. Level.

The present invention has been devised in view of this point, the purpose of the present invention is to automatically adjust at a high and low temperature using a thermostat, and has an input switching unit that can selectively control commercial power and midnight power, The mobile water heater is easy to install and use, hygienic and semi-permanent.

As a technical means for realizing the object of the present invention described above, a control circuit unit consisting of a water supply solenoid valve driver, a heater driver, an electromagnetic thermometer driver and a circulation pump driver, and the control circuit to selectively use the late-night power and commercial power It is characterized by a cold water tank unit consisting of the input switching unit configured, the circulating temperature sensor for detecting the water level of the cold water tank and the withdrawal temperature of the heat exchanger, and a hot water tank unit consisting of a high-temperature sensor for the heater and hot water and a hot water temperature sensor.

Hereinafter, the embodiment of the present invention in detail by the accompanying drawings as follows.

As shown in FIG. 1, the commercial power and the midnight power input to each input terminal (a, b) are connected to be supplied to the control circuit unit 20 via the input switching unit 10.

The input switching unit 10 connects the relay 13 to the midnight power input line and installs the on and off contacts 11 and 12 of the relay 13 to the commercial power line and the midnight power line. Install main switch (SW) in series on power line.

The control circuit unit 20 includes a solenoid valve driver 201, a heater driver 202, an electromagnetic thermometer driver 203, a circulation pump driver 204, and a cold water tank part constituting the hot water main body 40 ( 41 and the hot water tank unit 42 are provided with a low water level sensor 25 and a circulation temperature sensor 23, a heater 28, a low temperature sensor 21, a high temperature sensor 22 and a temperature sensor 24, respectively. do. The solenoid valve driving unit 201 receives the detection signal of the low water level sensor 25 to connect the electronic water supply valve 29 to be controlled, and the circulation pump driving unit 204 receives the detection signal of the circulation temperature sensor 23 for circulation. The pump 27 is controlled to be connected, and the electronic thermometer driver 203 drives the electronic thermometer 26 on the surface of the warm water main body 40 by receiving a detection signal from the temperature sensor 24 of the heater. The heater driver 202 receives the sensing outputs of the low and high temperature sensors 21 and 22 and controls the heating electric heater 28 to be controlled.

Meanwhile, the cold water supplied through the pipe 33 is installed to be supplied to the cold water tank part 41 through the solenoid valve 29, and is also circulated through the heat exchanger 50 while the temperature of the cold water pipe 34 is reduced. It is installed to be supplied to the cold water tank 41 through the).

In addition, the hot water of the hot water tank portion 42 is installed so as to be discharged to the tap through the pipe 37 and the valve 31, and also the pipe 36, the circulation pump 27, the pipe 35 and the valve ( 32 is installed to be supplied to the heat exchanger (50).

Referring to the operation and effects of the present invention made as follows.

When power is supplied to the input terminal (b) at midnight power (11 pm to 7:00 am the next day) through a separate line in the accompanying drawings, the relay 13 of the input switching unit 10 is driven and its always on contact point ( 11) (switch contact for the commercial power line) is turned off and the off point 12 thereof (switch contact for the midnight power line) is turned on, so that the night circuit power is supplied to the control circuit section 20.

Accordingly, the heater driving unit 202 drives the heater 28 in the hot water tank unit 42 to heat the water in the hot water tank to a predetermined temperature.

Thereafter, when the temperature of the water reaches a set temperature (for example, 90 °), the high temperature sensor 22 detects this and stops the operation of the heater 28 by the heater driver 202.

In addition, when the water in the heated hot water tank cools down to a set temperature (for example, 60 °) or less, the low temperature sensor 21 detects this, and provides a detection signal to the heater driving unit 202 in the control circuit unit 20. The heater 28 in the hot water tank 42 is operated by the heater driver 202.

In this way, the heater drive unit 202 in the control circuit unit 20 receives the sensing output of the set temperature of the high and low temperature sensors 22 and 21 in the hot water tank unit 42 and the heater 28 in the hot water tank unit 42. It is possible to maintain the water in the hot water tank to a temperature within a predetermined range by controlling the temperature, the temperature is detected by the temperature sensor 24 is the electron installed outside the hot water main body 40 through the electronic thermometer drive unit 203 Displayed by thermometer 26.

Meanwhile, hot water supplied to the heat exchanger 50 through the pipes 36 and 35 is forced to be circulated by the circulation pump 27, and the circulation pump 27 is the circulation pump driving unit 204 in the control circuit unit 20. In addition, the circulation pump driving unit 204 detects the output of the circulation temperature sensor 23 in the cold water tank unit 41 for detecting hot water of the discharge of the heat exchanger device 50 discharged through the pipe 34. To be controlled.

In addition, the hot water of the hot water tank is discharged to the faucet through the pipe 37, the cold water of the cold water tank is introduced into the hot water tank through the pipe 38 when the stored hot water in the hot water tank is reduced, accordingly When the water level is lowered and the predetermined storage amount is lowered, the low water level sensor 25 in the cold water tank unit 41 outputs a detection signal to the solenoid valve driving unit 201 in the control circuit unit 20, and is operated by the solenoid valve driving unit 201. Water is supplied to the cold water tank through the pipe 33 by operating the water supply solenoid valve 29.

On the other hand, since the contact 11 of the input switching unit 10 is turned on and the contact 12 is turned off when the power consumption is not used late at night, the control circuit unit 20 is supplied with commercial power by operating the main switch SW. It is possible to supply.

In the case of using the commercial power, the device of the present invention and the device of the present invention operate in the same way, so that duplicate description thereof will be omitted.

The present invention has a beneficial feature that considerably improves the use value of the electric water heater by providing a technical means that can be used only for the late-night power or a combination of the late-night power and commercial power. .

Claims (1)

In the electric hot water generator using the late-night electric power, the control circuit unit 20 including the solenoid valve driver 201, the heater driver 202, the electronic thermometer driver 203 and the circulation pump driver 204 for water supply, and Input switching unit 10 for supplying the late-night power to the control circuit unit 20, the low water level sensor 25 for detecting the water level of the cold water tank and the circulation temperature sensor 23 for detecting the discharge water temperature of the heat exchanger device (50) Cold water tank unit 41 including a, and a hot water tank unit 42, including a heater 28, a high temperature for hot water, low temperature sensors 22, 21 and a hot water temperature sensor 24, characterized in that Regenerative electric water heater.