JP2959200B2 - Electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater capable of heating and keeping a liquid contained therein and pouring the liquid into an external container.

[0002]

2. Description of the Related Art Recently , in order to satisfy the demand for obtaining delicious water and hot water, the time taken from the start of boiling at the time of boiling water to the power OFF (so-called boiling time) is increased, and the amount of water contained in tap water is increased. Some reduce substances known to be harmful to taste and health, such as trihalomethanes and trihalomethanes. The energization state in that case is that the maximum power of the heating element is applied constantly from the start of energization to the completion of water heating, and the completion of water heating is continued by energizing for a certain period of time with a timer after detecting the boiling with the sensor. Stop.

[0003]

According to a survey of tap water, substances such as trihalomethane and calcium in water are not always in the same amount, but are often increased in summer and decreased in winter. The efficiency can be improved by adjusting the boiling time accordingly.

[0004] The present invention is provided in view of the above points, and it is possible to realize an excellent electric water heater excellent in operability and low in maintenance cost.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems
Further, the present invention provides a container for containing a liquid, a heating element for heating and keeping the liquid in the container, a control board on which a control circuit for controlling the energization of the heating element is mounted, and an environmental temperature of the container body. And an environment sensor for sensing the temperature of the heating element, and controls the energizing time to the heating element after the liquid in the container boils, depending on the environmental temperature.

[0006]

According to the above-mentioned means, in summer, when the temperature rises , in which tap water is mixed with a large amount of chlorine, the surrounding temperature is detected and the boiling time is lengthened. , A low temperature is detected to shorten the boiling time.

[0007]

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

In FIG. 1 to FIG. 3, reference numeral 1 denotes a substantially cylindrical liquid storage container, which is provided at the lower end of a cylindrical body with a liquid-tight welding of an outer edge of a heat transfer plate 3 on which a heating element 2 is mounted. It is fixed by means. A pipe-shaped waterproof fitting 4 is provided on the bottom surface of the container 1, and is connected to a water pipe 5, which is one of the water guide paths, via a bushing 25.

At the end of the water pipe 5, a water pipe bushing having a fall-off valve is provided, and the water pipe bushing extends to the leading end 6 of the lead-out path via a case. Reference numeral 7 denotes a body that wraps the container 1 through a space. 8 is a spout placed on the body,
The body is clamped together with the lower hook 9.

[0010] Reference numeral 10 denotes a lid placed on the spout, which is supported by a hinge 11. When the container is viewed from the bottom, as shown in FIG. 1, there is a control board 13 set on the holder 12 below the heating element 2. On the control board, there are a connecting portion 14 for taking in electricity from an external power supply and a control circuit 15 for controlling the energization of the heating element 2 and the like.

The connecting portion is formed of a flame-retardant resin or the like, and has a connecting portion main body 16, a corner portion 17 serving as an inlet for an external power supply and serving as a contact point with a connecting device such as a magnet plug, and a terminal for internal wiring. And a terminal plate 18.

The connecting portion 14 is sandwiched between the body 7 and the hook 9. The corner 17 is directed outward.

The terminal plate 18 is inserted into a hole in the substrate at the tip end and fixed with solder or the like. A pattern of the control circuit section is also provided around the fixed hole, and the connection section 14 directly supplies power to the control circuit.

The power supply to the heating element 2 is controlled by detecting the temperature with a temperature sensor 19 (hereinafter referred to as a sensor) provided outside the bottom of the container, and controlling the temperature by a control circuit.

The connection between the sensor, the thermal fuse, and the heating element is made by connecting a lead wire from each component and a faston terminal to a tab provided on the substrate.

If the legs of the connection portion main body are set in the holes of the substrate 13 as shown in FIG. 2, even if the connection between the terminal plate and the substrate is not stable, the connection with the substrate is possible. The part is securely fixed.

On the control board 13, there is provided an external operation switch 2 for operating when the water is to be boiled again from the warm state.
0 is also attached.

Reference numeral 21 denotes an operation unit, which displays a water heating state and a warm state. FIG. 5 shows a control board. Here, the connection portion 14 is mounted on the control board, and a perforation is provided between the periphery of the connection portion mounting portion of the control board 13 and the control circuit portion, thereby assembling and holding the main body. Is divided in this part and attached to each place.

In addition, since the wires are previously connected to the mounting portion between the substrates by soldering or the like between the two, it is only necessary to divide and mount the substrate during assembly.

The control circuit 15 includes an environmental sensor 2.
3 has a function of detecting the ambient room temperature and sending data sent to the timer circuit 24 to control the time for boiling the liquid in the container.

That is, after the boiling of the liquid is detected by the sensor 19, the boiling is continued for a certain time by the timer circuit, but when the room temperature is high, the boiling is continued for a long time. On the contrary, when the room temperature is low, the boiling is completed in a relatively short time.

[0022]

According to the above-mentioned invention, in summer or the like, when the temperature rises, in which a large amount of chlorine is mixed in tap water, the surrounding temperature is detected, the boiling time is lengthened, and the generation of impurities in the water is relatively small. In winter, low temperatures are detected to shorten the boiling time, so that it is possible to provide the necessary boiling water to provide good quality hot water when it is really necessary. And it does not consume unnecessary electricity.

[Brief description of the drawings]

FIG. 1 is a bottom view of an electric water heater showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the electric water heater.

FIG. 3 is an external perspective view of the electric water heater.

FIG. 4 is a bottom view of an electric water heater showing another embodiment of the present invention.

FIG. 5 is a partial front view showing a substrate in the embodiment.

FIG. 6 is an electric circuit diagram according to still another embodiment of the present invention.

FIG. 7 is a bottom view of a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Heating element part 13 Control board 14 Connection part 15 Control circuit 16 Connection part main body 20 External operation switch 22 Electric wire 23 Environmental sensor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47J 27/21

Claims (1)

(57) [Claims] 1. A container for accommodating a liquid, a heating element for heating and keeping the liquid in the container, a control board on which a control circuit for controlling the energization of the heating element and the like are mounted, and an environmental temperature of the main body. An electric water heater provided with an environmental sensor for sensing the temperature of the liquid, and controlling the time for energizing the heating element after boiling of the liquid in the container according to the environmental temperature.