JPS6160337B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply control device used in a hot water supply device provided in a heater.

The hot water collected by the solar collector is introduced into the hot water tank installed in the hot water tank, and this hot water raises the temperature of the water in the hot water tank.A heater is installed in the hot water tank to collect the heat. A water heater has already been proposed in which the heater is energized to heat the water in the hot water storage tank and the hot water tank when the temperature of the hot water is not sufficiently raised due to low water temperature.
(See No. 44117).

And in conventional water heaters like this,
A temperature sensor detects the temperature of hot water in the hot water tank,
When this temperature falls below a predetermined value, the heater is energized to heat the hot water. For this reason, when the weather is cloudy or otherwise unfavorable, the sun's heat during the day cannot be fully utilized, so in such cases the heater is activated to ensure that the hot water in the hot water tank is always at or above a specified temperature. There is. However, in order to detect the average temperature of the hot water in the hot water tank, the temperature detector is provided at a position midway in the vertical direction of the tank. Therefore, when heating hot water with a heater based on the temperature sensor's detection, almost all of the hot water is raised to a predetermined temperature, and when a relatively small amount of hot water is used, the remaining hot water is used unnecessarily. This is uneconomical as it will heat up the temperature.

This invention was made in view of the above points,
The purpose of this is to save energy by heating only the water that is being used, improve economic efficiency, and provide easy-to-use hot water control that can accommodate a variety of uses for water heaters. The goal is to provide equipment.

In order to achieve such an object, the present invention includes a first temperature detector that detects the temperature of canned water in the upper part of the water heater and operates when the temperature falls below a predetermined value; a manual switch connected directly to the temperature sensor; and a circuit for operating the heater based on the current flowing through the series circuit when the manual switch is operated while the first temperature sensor is in an operating state; A second temperature detector detects the temperature of the canned water in the lower part of the water heater, and when the second temperature detector detects that the canned water has reached a predetermined temperature or higher, a heating device is activated. By operating a manual switch, only the canned water in the upper part can be heated to a predetermined temperature, and by the action of a second temperature sensor, the entire canned water can be heated to a predetermined temperature. This is what I did to get it. Further, the heater can be operated by time-limited operation and manual operation.

Hereinafter, this invention will be explained in detail based on the drawings.

The figure is a circuit configuration diagram of an embodiment of a hot water supply control device according to the present invention. In the figure, 1 is a solar collector installed outdoors, 2 is a water heater, 3 is a heat exchanger placed inside the water heater 2, and 4 is a heater installed outside the bottom of the water heater 2. It's a burner.

Between the heat exchanger 3 and the solar collector 1 are tubes 5 and 6.
The hot water heated by the solar collector 1 is sent by the pump P through the pipe 5 to the heat exchanger 3, where it gives heat to the canned water in the water heater 2. Note that the pump P is controlled by a comparator C according to the temperature difference between the hot water in the solar collector 1 and the water heater 2. The water whose temperature has decreased through heat exchange is returned to the solar heat collector 1 via the tube 6, and this cycle is repeated thereafter, and the canned water is heated by solar energy. Canned water in the water heater 2 is supplied from a water pipe through a pipe 7 connected to the bottom of the water heater 2, and heated hot water is supplied to a hot water faucet, etc. through a pipe 8 connected to the top of the water heater 2. be done.

When the burner 4 is ignited, the canned water in the water heater 2 is heated separately from the heating by solar energy. The boundaries of the canned water in the water heater 2 are not sharp, but the upper part is a high temperature part H, the lower part is a low temperature part L, and the middle part is a medium temperature part M. A temperature detector 9 made of a thermistor is provided in the area of the medium temperature part M, and a temperature detector 10 made of a bimetal is provided in the area of the high temperature part H.
are provided for each. As will be described later, the temperature detector 9 detects the average temperature of the canned water and controls the burner 4.
The temperature detector 10 detects the temperature of the high-temperature portion H of the canned water and stops the burner 4, which is a feature of the present invention.

On the other hand, numeral 11 is a timer that has a built-in clock device and is turned on and sends out a timer signal at the only fixed time every day, for example, 5 p.m.; numeral 12 is a non-lock type manual switch installed at a convenient location for operation; 13 is a latch circuit consisting of a flip-flop circuit; 14 is a relay having a normally open contact 14a;
15 is a comparator that compares the terminal voltage of the thermistor 9a of the temperature detector 9 with a reference voltage; 16, 17;
is an inverter, and 18 is a diode.

Further, reference numeral 20 designates an energy-saving manual switch provided at a convenient location for operation, and is connected in series with the bimetal contact 10a of the temperature detector 10. This bimetal contact 10a is turned on when the temperature is below the set temperature of the temperature detector 10, and turned off when the temperature is above the set temperature. This set temperature is set to, for example, 45°C. 21 is manual switch 2
2 is a NOR circuit, and 23 is an inverter. When the temperature of the high temperature part H of the canned water is below the set temperature, the light emitting diode 21 is lit. Each of these components constitutes a control circuit that characterizes the present invention.

Next, circuit operation will be explained.

At 5:00 p.m., just before the frequency of hot water usage in general households increases, the timer 11 operates and sends a timer signal to the latch circuit 13. As a result, the latch circuit 13 is set and outputs a "1" level signal, which is inverted by the inverter 16 and a "0" signal is input to the NOR circuit 22.

As a result, the output of the NOR circuit 22 becomes "1", which is inverted by the inverter 23, becomes a "0" signal, and is supplied to the relay 14, so the relay 14 is energized and operates, and the normally open contact 14a is turned on. . As a result, the burner 4 ignites and starts a combustion operation to heat the canned water in the water heater 2. This heating is performed regardless of the state in which the canned water is heated by the solar collector 1. In other words, even if the canned water is sufficiently warmed during the day on a sunny day, or even if the canned water is not sufficiently warmed on a cloudy day, the burner 4 will be turned off at a certain time.
Heating is performed by When the canned water is heated and its average temperature rises to a predetermined temperature, the thermistor 9
The terminal voltage of a becomes lower than the reference voltage, and the output of the comparator 15 becomes "0" level. As a result, current flows through diode 18 and diode 1
The level at the connection point between 8 and inverter 17 becomes "0", and is further inverted by inverter 17 to become a reset signal and sent to latch circuit 13. When the latch circuit 13 is reset, the output becomes "0", no current flows through the relay 14, the normally open contact 14a is turned off, and the combustion operation of the burner 4 is stopped. When the canned water is heated during the day by solar heat, the heating by the burner 4 based on the timer operation is completed in a short time, and the fuel of the burner 4 is saved.

On the other hand, if you want to use a large amount of hot water before the timer setting time when the canned water has not warmed up sufficiently during the day due to cloudy weather, or if you want to use a large amount of hot water before the timer setting time, or if you want to use a large amount of hot water after using the hot water heated by burner 4 based on the timer operation. If you want to use hot water, you can press the manual switch 12 to reheat the water. That is, manual switch 1
2 is turned on, the latch circuit 13 is set, the normally open contact 14a of the relay 14 is turned on, and the burner 4 starts its combustion operation. When the canned water is heated and the average temperature rises to a predetermined temperature, the latch circuit 1 is activated based on the change in the terminal voltage of the thermistor 9a as described above.
3 is reset and the combustion operation of the burner 4 is stopped.

Then, when the temperature of the canned water in the water heater 2 is low and the bimetal contact 10a is on and the light emitting diode is lit, a small amount of hot water of about 100 or less is poured, for example when the volume of the water heater 2 is 400. If you want to use it, turn on the manual switch 12,
As mentioned above, the burner 4 operates and the entire canned water is heated until the average temperature reaches the predetermined temperature.
This is uneconomical as it boils up unnecessary hot water. Manual switch 20 for energy saving in such cases
is used. That is, when the manual switch 20 is turned on, a "0" signal is input to the NOR circuit 22 and a "1" signal is output. This "1" signal is inverted by the inverter 23 to become a "0" signal, so current flows through the relay 14, turning on the normally open contact 14a, and the burner 4 starts combustion operation. Eventually, when the high temperature part H of the canned water rises to 45°C, the temperature detector 10 operates, the bimetal contact 10a turns off, the light emitting diode 21 goes out, and at the same time the input signal of the NOR circuit 22 is turned off. becomes "1", the relay 14 becomes inactive, the normally open contact 14a turns off, and the combustion operation of the burner 4 stops. If the manual switch 20 is left on, when hot water is used and the temperature of the high-temperature section H falls, the bimetal contact 10a is turned on and the burner 4 is operated again to heat it.

When the manual switch 20 is turned on in this manner, even if the burner 4 is operated, only the temperature of the upper canned water increases, and the minimum amount of fuel used is required, resulting in energy savings. Further, heating by the burner 4 only takes a short time, and the necessary hot water can be obtained immediately even during periods when the timer is not operating and the water is used infrequently.

In the above embodiments, a burner was used as the heater, but an electric heater may also be used.

As described above, according to the hot water supply control device of the present invention, in addition to raising the temperature of the entire canned water, it is possible to arbitrarily raise the temperature of only the upper part using the first temperature sensor by operating the manual switch. It has the excellent effect of saving energy and being economical.

[Brief explanation of the drawing]

The figure is a circuit configuration diagram of an embodiment of a hot water supply control device according to the present invention. 1...Solar heat collector, 2...Water heater, 3...
Heat exchanger, 4... Burner, 9, 10... Temperature detector, 10a... Bimetal contact, 14... Relay, 14a... Normally open contact, 20... Manual switch, 21... Light emitting diode, 22... ...Noah circuit.

Claims (1)

[Claims] 1. In a water heater capable of heating canned water by operating a heater, detecting the temperature of canned water in an upper part of the water heater;
a first temperature detector that operates when the temperature falls below a predetermined value; a manual switch connected in series with the first temperature detector; and a manual switch that operates when the first temperature detector is in the operating state. a circuit that operates the heater based on the current flowing through the series circuit when When the detector detects that the canned water has reached a predetermined temperature,
a circuit that disables the operating heater, and by operating the manual switch, only the canned water in the upper part can be heated to a predetermined temperature;
A hot water supply control device characterized in that the entire canned water can be heated to a predetermined temperature by the action of the temperature detector. 2 The hot water collected by the solar collector is sent to a heat exchanger, which raises the temperature of the canned water in the water heater, and also operates the heater to heat the canned water. A hot water supply control device, comprising a timer that operates the heater at a unique set time of the day and a switch that can operate the heater at any time, and means for canceling these operating conditions by detecting the temperature of canned water; A hot water supply control device characterized by comprising means for heating a required amount of canned water at any time by operating a manual switch that can be opened and closed at will based on the operating conditions of a temperature detector provided above the canned water. .