JPS633612Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electric water heater.

Recently, a jar-type electric pot with a heater attached to the thermos pot has been commercialized, which can function as both a boiler and a heat insulator, and has been well received for its ability to provide hot water at all times. In addition to having to keep a large amount of water warm, there was also a restriction on the heater capacity at the time of the initial heating operation from cold water, and it took a long time to reach a usable state. There was a considerable amount of wasted power consumption to maintain the temperature. Products such as gas instantaneous water heaters may be considered as a solution to these problems, but household appliances that use electricity have the disadvantage of requiring a heater that consumes a large amount of power, making it difficult in terms of power supply. Ta.

The present invention was devised to eliminate the above-mentioned drawbacks; a check valve is attached to the water tank, a heating pipe is connected to the check valve, a heating element equipped with a thermostat is interposed, and the heating pipe is connected to an electromagnetic In an electric water heater that is connected to a switching valve and supplies hot water via the electromagnetic switching valve, an operating circuit in which the switch and the electromagnetic switching valve are connected in series is connected in parallel with the thermostat, and these are connected in series with the heating element. The purpose of the present invention is to provide a structure in which preheated hot water can be quickly heated to high temperature hot water by switching a switch, and heat loss is small and power consumption can be reduced as well as heat retention power.

An embodiment of the present invention will be described below with reference to the drawings.

The configuration of the embodiment is as shown in FIGS. 1 and 2,
1 is the body of the water heater, 2 is a water tank fixed to one side of the body 1, and 3 is a check valve installed in a part of the water tank 2, which is a one-way valve that prevents backflow to the water tank 2. be. 4 is a heating element with a heater fixed to the other side of the vessel body 1, 5 is a hollow heating pipe, one end of which is connected to the check valve 3 as shown in the figure, and the middle part is buried in the heating element 4 to provide good heat. The other end extends along the water tank 2 to the upper surface. 6 is an electromagnetic switching valve connected to the other end of the heating pipe 5, and branched through the electromagnetic switching valve 6, with one condensing pipe 7 returning to the water tank 2, and the other supplying hot water into the required tap 12. The condensate pipe 7 is normally open and the hot water pipe 8 is closed. 9 is a thermostat fixed to a part of the heating element 4, and 10 is a heat insulating plate that is in close contact with the upper surface of the heating element 4. Reference numeral 11 is a cover that covers the water tank 2, and reference numeral 12 is a tip that is placed on the heat insulating plate 10 so as to be located directly below the water supply pipe 8. 13 is a normally open type switch and is manually operated. As shown in Figure 2, the electric circuit has an operating circuit in which a switch 13 and an electromagnetic switching valve 6 are connected in series, an operating circuit is connected in parallel with a thermostat 9, and these are connected in series with a heating element 4. .

The operation of this embodiment will be explained below. When a predetermined amount of water is poured into the water tank 2, the water passes through the check valve 3 and fills the heating pipe 5 to the same level as the water level. Next, when connected to a power source via a plug (not shown), the heating element 4 is heated via the thermostat 9, and some of the water in the heating pipe 5 boils rapidly, causing the expansion pressure to rise. The electromagnetic switching valve 6 keeps most of the water in the heating pipe 5 open at all times.
At the same time, the cold water at the bottom of the water tank 2 passes through the check valve 3 and enters the heating pipe 5 through the condensate pipe 7 and enters the water tank 2.
As the water temperature in the water tank 2 gradually rises, the heating pipe 5, which has been maintained at a certain temperature, also introduces hot water, causing its temperature to rise due to the cycle of heating, discharging, and then introducing cold water. When the temperature rises above a certain level, the thermostat 9 operates to stop heating, and the water in the water tank 2 is kept at a constant temperature. That is, the thermostat 9 has the effect of preheating the water tank 2 to a constant temperature. When high-temperature hot water is required, place the cup 2 on the heat insulating plate 10 and turn on the switch 13, which activates the electric circuit coil etc. installed in the electromagnetic switching valve 6, closes the condensate pipe 7, and closes the other hot water pipe 8. At the same time, a series circuit of the switch 13, the electromagnetic switching valve 6, and the heating element 4 is formed, and the water temperature rises, causing the thermostat 9 to open.
Since the heating element 4 is continuously energized even when the heating element 4 is turned off, the hot water in the heating pipe 5 is rapidly heated, rises in the pipe, passes through the electromagnetic switching valve 6, and is intermittently pumped into the cup 12 from the hot water pipe 8. Drip into. When the desired amount is in the cup 12, turn the switch 13.
At the same time as turning off, the circuit of the electromagnetic switching valve 6 is cut off, so the hot water pipe of the electromagnetic switching valve 6 is closed and the condensate pipe is opened, and all the hot water in the heating pipe 5 at this point passes through the condensing pipe 7. The hot water is returned to the water tank 2 and dripping of hot water from the hot water pipe 8 is stopped. The heating element 4 is also de-energized at the same time, but because of its thermal inertia, the hot water in the heating pipe 5 ejects as hot water, albeit for a short time. However, all of this hot water is recovered into the water tank 2 by the operation of the switching valve 6. Further, the cup 12 is placed on the heat insulating plate 10, and a part of the thermal energy of the heating element 4 is supplied to the cup 12 to heat it. Note that since one side of the hot water in the heating pipe 5 of the heating body 4 is blocked by the check valve 3, the hot water is spouted toward the electromagnetic switching valve 6 on the other side. Further, the capacity of the water tank 2 can be freely increased or decreased depending on the purpose of use, but as described above, the time required for spouting hot water depends on the electric power of the heating element 4.

According to the present invention, a heating body having a thermostat, a check valve whose one end communicates with a water tank, and a heating pipe whose other end connects to an electromagnetic switching valve via the heating body and an electromagnetic switching valve branch into one end. The other side of the water tank was opened for communication above the tap, and the electric circuit was constructed by connecting the series circuit of the switch and the electromagnetic switching valve in parallel with the thermostat, and connecting this parallel circuit in series with the heating element. By switching the preheated water, the preheated water can be quickly brought to a high temperature, reducing heat loss and reducing power consumption as well as keeping the water warm.It also prevents the hot water in the pot from dropping, making it energy-saving and economical. It has various effects such as improving usability.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of an electric water heater showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the electric water heater. 2...Water tank, 3...Check valve, 4...Heating element, 5...Heating pipe, 6...Solenoid switching valve, 9...
...Thermostat, 12...Cop, 13...Switch.

Claims (1)

[Scope of utility model registration request] A check valve 8 is attached to the water tank 2, and the check valve 8
In an electric water heater, a heating pipe 5 is connected to a heating body 4 having a thermostat 9, the heating pipe 5 is connected to an electromagnetic switching valve 6, and hot water is supplied via the electromagnetic switching valve 6. An operating circuit in which the and electromagnetic switching valves 6 are connected in series is connected in parallel to a thermostat 9 provided for preheating.
An electric water heater characterized in that these are connected in series with a heating element 4.