JP2531993B2 - Midnight water heater electric circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention makes effective use of late-night electricity, which is cheap, and stores water by boiling water at midnight, and if there is a shortage in the daytime, the necessary amount is chased. It relates to the electric circuit of a late-night water heater that can cook.

(Prior art and its problems) In a conventional midnight water heater, a drainage drain 2 is provided at the bottom 1A of a vertical hot water storage tank 1 having a heat retaining structure in the periphery, and a water supply port 3 and a heater 4 are provided near the bottom. Provided, the hot water storage tank 1
A hot water outlet 5 is provided in the upper part 1B of the hot water, a predetermined volume of water is boiled by using an inexpensive midnight power from 11:00 to 8:00 the next morning, and a hot water rising conduit 6 is used to store hot water in the upper part of the hot water storage tank 1. Incidentally, in the daytime, hot water (boiling water) in an amount corresponding to the reinforcement from the hot water supply port 3 is taken out by overflowing.

(Problems to be solved by the invention) According to such a conventional type midnight water heater, since the hot water in the hot water storage tank is exhausted, the use of the midnight water heater is restricted until the next morning when the hot water in the hot water tank is exhausted. There was a problem that Therefore, it is necessary to install a late-night water heater with enough room for the amount of hot water required for the household, and there is a problem that the equipment cost is unnecessarily bulky.

The present invention has been made in view of the problems of the conventional example, and an object of the present invention is to provide an electric circuit of a late-night water heater that is smaller than the conventional one and is sufficient by adding an additional cooking function.

(Means for Solving the Problems) In order to achieve the above object, the electric circuit of the midnight water heater of the present invention includes a heater 4 installed in the hot water storage tank 1, and is turned on at the midnight time, and is turned on by the midnight power. Heater 4
The relay 14 for the late-night power that energizes to heat the water in the hot water storage tank 1 and the relay 15 for the daytime power that turns on as needed during the daytime to reheat the water in the hot water storage tank 1 by the daytime power. And a hot water amount detection thermosensor connected in series to the daytime power relay 15 and installed in the hot water storage tank 1 over a plurality of stages.
17, a switch 18 for operating the daytime additional power for operating the relay 14 for daytime power, and switching the connection between the daytime power supply 24 and the midnight power supply 23, and at the same time the relay 15 for daytime power and the relay 14 for midnight power
It is composed of an interlock auxiliary relay 13 that operates only one of the above, and a hot water amount adjusting switch 25 connected in parallel to the hot water amount detecting thermosensor 17.

The technical means is adopted.

(Operation) The operation according to the features of the present invention is as follows.

The water in the hot water storage tank 1 is boiled with priority to midnight, and the hot water in the hot water storage tank 1 is kept warm, and the hot water in the hot water storage tank 1 is used during the daytime.
If there is a shortage of hot water, it is possible to supplement the required amount by using daytime electricity.

As a result, since it is possible to install a late-night water heater with a capacity as small as the required amount, it is possible to minimize equipment costs.

(Example) Hereinafter, one example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of an embodiment of the whole midnight water heater according to the present invention, and FIG. 2 is an embodiment of its electric circuit. The hot water storage tank 1 has a heat insulating structure around the bottom portion 1A of the hot water storage tank 1, a drainage drain 2 is provided, a water supply port 3 and a heater 4 are provided near the bottom portion, and hot water is taken out to the upper portion 1B of the hot water storage tank 1. A mouth 5 is provided to boil a predetermined amount of water by using inexpensive midnight power from 11:00 am to 8:00 the next morning.
Hot water is stored in the upper part of the hot water storage tank 1 by using the hot water rising conduit 6, and hot water of an amount corresponding to the supply from the hot water supply port 3 (boiled water of about 85 ° C.) is taken out by overflowing in the daytime. Is configured.

Here, a heat insulating member known per se is used as the heat retaining structure. The capacity of the hot water storage tank 1 for a family of 4 to 5 people is about 350 (of course, the capacity is determined according to its use and required amount). The water supply port 3
A water pipe is connected to the through a pressure reducing valve 8 and a filter. The hot water outlet 5 is provided with a safety valve 9, which is branched into a conduit 10 to the outlet and an escape conduit 11. Also, the heater 4 used is of 3.4 kw, but of course, an appropriate wattage (for example, 370 → 4.4 kw, 250 → 3.4 kw, 150 → according to the capacity of the hot water storage tank 1 is used.
2.2kw) can be used.

The inner wall 1c of the hot water storage tank 1 is made of a stainless plate. Further, the bottom portion 1A of the hot water storage tank 1 is formed in a shape in which the central portion is dented in a funnel shape, and the drainage drain 2 is attached to the center thereof so that all the water in the bottom portion 1A can be discharged. No scale will be accumulated. A hot water rising conduit 6 is erected on the heater 4, the conduit 6 is provided above the hot water storage tank 1 with a slight gap left in the upper inner wall of the hot water storage tank 1, and a deflecting plate 6'is provided. It is open.

An inverted funnel-shaped guide hopper 7 is provided at the lower end of the hot water raising conduit 6 so as to have a gap t between the outer edge 7'and the inner wall 1c of the hot water storage tank 1, and the outer edge 7'is It is provided so as to be located slightly above the water supply port 3. Further, a thermo valve 21 that opens at about 85 ° C. is installed in the hot water rising conduit 6, and an abnormal temperature rise prevention device 20 is installed further below the thermo valve 21.

On the inner wall 1c of the hot water storage tank 1, hot water amount detection thermosensors 17 are installed over a plurality of stages to detect the amount of hot water in the hot water storage tank 1.

 Next, the electric circuit of the present invention will be described.

The midnight water heater is supplied with the midnight electric power and the daytime electric power, and which electric power is to be used is automatically switched by the original power supply unit when time comes.

By the way, 13 is an auxiliary relay for interlock, which switches the connection between the daytime power supply 24 and the midnight power supply 23 and activates only one of the daytime power relay 15 and the midnight power relay 14. ing. The interior includes a daytime contact point 13b, a midnight contact point 13a, and an electromagnetic coil 13c for simultaneously operating the contact points. The midnight contact 13a is connected to the midnight power supply 23, and the daytime contact 13b is connected to the daytime power supply 24.
Input sides of 13a are connected to each other via an electromagnetic coil 13c.

14 is a relay for late-night power, and the internal structure is composed of a daytime contact 14b for interlock, a late-night contact 14a, and an electromagnetic coil 14c for simultaneously operating the contacts. The contact 14a is connected, and further, one of the daytime contacts 13b of the auxiliary relay 13 and one of the interlock daytime contacts 14b of the midnight power relay 14 are connected to each other. Further, one of the late-night contacts 13a of the auxiliary relay 13 and the reheating contact 15b of the daytime power relay 15 to be described below are the electromagnetic coils 14c of the midnight power relay 14.
Connected through.

15 is a relay for daytime power, the internal structure of which is a contact for daytime
15a and a contact 15b for additional cooking, a self-holding contact 15a 'and an electromagnetic coil 15c for simultaneously operating the contacts, and a daytime power source 24 and a daytime contact 15a are connected, and The other one of the daytime contacts 13b of the auxiliary relay 13 and the self-holding contact 15a 'of the daytime power relay 15
And are connected to each other. Also, this line diverges,
It is connected to a hot water amount thermosensor 17 via a daytime additional cooking switch 18 described later. Further, another one of the midnight contacts 13a of the auxiliary relay 13 and the hot water amount thermosensor 17 are similarly connected.

Further, one of the daytime contacts 14b of the midnight power relay 14 is connected to a boiling temperature control thermoswitch 16 described later via an electromagnetic coil 15c of the daytime power relay 15.

19 is an earth leakage breaker, and a relay 14 for late night power is connected for late night
14a and the daytime contact 15a of the daytime power relay 15 are connected to the input side thereof, and are connected to the heater 4 via the abnormal temperature rise prevention device 20. This abnormal temperature rise prevention device 20
Is installed below the thermo valve 21 in FIG.

Reference numerals 17a, b, and c are boiling temperature control thermostats connected by a series of hot water thermosensors (three or four are connected in series in the present embodiment, but not limited to this).
It is connected between 16 and the switch 18 for daytime additional cooking.

Further, the hot water amount thermosensors 17a, b, c are respectively connected with hot water amount adjusting switches 25a, b, c in parallel so that the amount of additional cooking can be determined by the cooperation of both.

Then, at 11:00 pm, when switching to midnight,
The electromagnetic coil 13c of the auxiliary relay 13 is energized to switch between the daytime contact 13b and the midnight contact 13a. Then, the electromagnetic coil 14c of the midnight power relay 14 is energized, and the daytime contact 14b and the midnight contact 14a are switched. As a result, the midnight contact 14a is turned on, the heater 4 is energized through the earth leakage breaker 19,
The water in the hot water storage tank 1 is boiled by inexpensive late-night power. The high temperature water around the heater 4 is collected by the hopper 7 and rises in the warm water raising conduit 6. Here, when the thermo valve 21 reaches a predetermined temperature (about 85 ° C), the thermo valve 21
21, the hot water rises in the hot water rising conduit 6, flows out from the upper end opening, and accumulates in the upper part of the hot water storage tank 1. When the water in the hot water storage tank 1 is boiled, the boil-up temperature control thermo-switch 16 is activated to stop the energization of the heater 4, and the temperature is maintained in the boiled state. In this way, the water in the hot water storage tank 1 is boiled at night. The next morning, at 8:00, the daytime electric power source 24 is automatically switched to, the electromagnetic coil 13c is turned off, and the contact of the auxiliary relay 13 is switched. At this point, the hot water amount thermosensor 17, the hot water amount adjusting switch 25, the daytime additional cooking switch 18, and the daytime contact 15a of the daytime power relay 15 are turned off, and the heater 4 is maintained in the off state.

By the way, when the tap of the tap is opened, tap water flows into the hot water storage tank 1 via the pressure reducing valve 8 in response, and the same amount of hot water is discharged from the tap.
Flow out of the tap through 10. In this way, the level of cold water gradually rises and the amount of hot water stored in the upper part of the hot water storage tank 1 gradually decreases. If you run out of hot water and want to use more hot water, select one of the hot water amount adjustment switches 25 that displays the required amount to turn it on, and turn on the daytime additional cooking switch 18 to perform additional cooking. .

That is, one of the daytime contact 13b of the auxiliary relay 13, one of the daytime contact 14b of the midnight power relay 14 (on side), the electromagnetic coil 15c of the daytime power relay 15, the boiling thermoswitch 16, the hot water adjustment switch. 25a, b ... n. A hot water thermosensor 17, a daytime additional cooking switch 18, a current flows through the other of the daytime contacts 13b of the auxiliary relay 13, and the electromagnetic coil 15c is excited to contact the daytime power relay 15 Is switched on, the daytime contact point 15a is turned on, the heater 4 is energized, and additional cooking is started. At the same time, the self-holding contact 15a 'is turned on, the contact 15b is turned off, and the energization state of the electromagnetic coil 15c is maintained, so that the energization state of the heater 4 is maintained even after the daytime additional cooking switch 18 is released. Cooking continues. As in the case of midnight, hot water accumulates in the upper part of the hot water storage tank 1, and the boundary between cold water and hot water gradually decreases.
As a result, the water amount thermosensors 17a and 17b are gradually turned off as the boundary is lowered, and when the hot water amount thermosensor 17n at the set position is turned off, the (n + 1) th hot water amount adjusting switch 25 (n + ₁ ) and the hot water amount are set. Thermo sensor
Both 17n are turned off, which causes the daytime power relay 15
The electromagnetic coil 15c of the
Energization stops. This completes the additional cooking of the predetermined amount of hot water.

(Effect) The electric circuit of the midnight water heater of the present invention is for a midnight electric power which is turned on at a midnight time with a heater installed in the hot water storage tank and energizes the heater by the midnight electric power to cook the water in the hot water storage tank. A relay and a relay for daytime power, which is turned on as needed during daytime and is used to supplement the water in the hot water storage tank with daytime power, and is connected in series to the daytime power relay, and is installed in the hot water storage tank in multiple stages. Hot water amount detection thermosensor, a daytime additional cooking switch for operating the daytime power relay, and switching between the connection between the daytime power supply and the late-night power supply and the daytime power relay and the late-night power relay. It is composed of an interlock auxiliary relay that operates only one of them, and a hot water amount adjusting switch connected in parallel to the hot water amount detecting thermosensor. Because there,
It is possible to boil the water in the hot water storage tank by using the power at midnight with priority on midnight, and easily reheat it in the daytime if necessary, so that the size of the midnight water heater can be adjusted to the required amount of hot water, There is an advantage that it is not necessary to increase the size of the equipment more than necessary.

[Brief description of drawings]

FIG. 1 ... Schematic cross-sectional view of a first embodiment of a midnight water heater according to the present invention FIG. 2 ... Electric circuit diagram of an embodiment for a midnight water heater according to the present invention (1) ... Hot water storage tank, (1A) …… Bottom (1B) …… Top, (1C) …… Inner wall (2) …… Drainage drain, (3) …… Water inlet (4) …… Heater, (5) …… Hot water outlet (6)… … Conduit for rising hot water, (6 ′) …… Deflector (7) …… Hopper, (7 ′) …… Outer edge (8) …… Reducing valve, (9) …… Safety valve (10) …… Conduit, (11) …… Escape conduit (13) …… Auxiliary relay, (13b) …… Daytime contact (13a) …… Midnight contact, (13c) …… Electromagnetic coil (14) …… Midnight power relay (14b) ) …… Interlock contact (14a) …… Midnight contact, (14c) …… Electromagnetic coil (15) …… Daytime power relay, (15a) …… Daytime contact (15a ′) …… Self-holding Contact , (15b) …… Additional heating contact (15c) …… Electromagnetic coil (16) …… Boiling temperature control thermo switch (17a, b… n) …… Temperature detection thermosensor (18) …… Additional heating for daytime Switch (19) …… Earth leakage breaker, (20) …… Abnormal temperature rise preventer (21) …… Thermo valve (23) …… Midnight power supply, (24) …… Daytime power supply (25) …… Hot water amount adjustment switch, (t) ... gap

Claims (1)

(57) [Claims] 1. A heater installed in a hot water storage tank, a relay for midnight power that is turned on at midnight and energizes the heater with midnight power to cook water in the hot water storage tank, and if necessary during the daytime. Is turned on, and a relay for daytime power for recharging water in the hot water storage tank by daytime power, and a hot water amount detection thermosensor installed in the hot water storage tank in multiple stages connected in series to the relay for daytime power, and For the interlock that switches the connection between the daytime power supply and the midnight power supply and also operates only one of the daytime power relay and the nighttime power relay, and a switch for operating the daytime additional power supply for operating the daytime power relay. Of the midnight water heater, which is composed of an auxiliary relay and a hot water amount adjusting switch connected in parallel with the hot water amount detecting thermosensor. Ki circuit.