JPH0515450A - Electrical hot-water heater - Google Patents

Abstract

PURPOSE:To enhance the assembling ability and use ability of an electrical hot-water heater. CONSTITUTION:A connection part 14 for introducing electric power from the outside and a control circuit 15 are laid on one and the same base so that the connection part 14 and the control circuit 15 are directly connected on the base. Accordingly, the connection and wiring of electrical wires for the connection part can be eliminated, thereby it is possible to save labor and to enhance the safety due to a surely connecting condition.

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 retaining a contained liquid and pouring the liquid into an external container.

[0002]

2. Description of the Related Art Since a few years ago, the control method of the heating element of an electric water heater has been changed from the conventional thermostat.
Sensors such as thermistors have been used to detect the temperature of hot water in the container, incorporate that signal into a control circuit, and use relays or triacs to control energization. Therefore, the bottom surface of the body where the control circuit is provided is in a state where various lines intersect as shown in FIG.

Reference numeral 101 denotes a control board (hereinafter referred to as a board) which constitutes a control circuit, on which a relay, a triac and the like are installed. Between the control circuit and other electric parts (heating element, fuse, etc.), a connector of a lead wire from another part is connected to the connector 102 provided on the board, or a lead wire terminal is directly embedded in the board. The object 103 is connected to other parts.

Reference numeral 104 denotes a peck frame serving as an intake port for taking in electricity from an external power source, which is normally installed by providing a connection terminal 105 on the outer surface at the bottom of the body.

On the inner surface, there is a square plate 106 for connecting to each electric component inside the body, and the square plate 106 is connected to the terminal at the tip of the lead wire from another electric component by a screw or the like.

Further, in order to satisfy the demand for obtaining delicious water and hot water recently, the power is turned off from the start of boiling when boiling water.
It is also possible to extend the time taken for the so-called (so-called boiling time) to reduce substances contained in tap water, such as chlorinated water and trihalomethane, which are considered to be harmful to taste and health. The energized state in that case is that the maximum power of the heating element is constantly applied from the start of energization to the completion of boiling water. Stop.

[0007]

The use of electronic circuits as a control function is increasing in home electric appliances such as water heaters, and although high-tech products have been developed, the wiring processing work during the assembly of the body is Although some parts are connected by several connectors, they are still mainly connected by faston terminals or terminal screws, and improvement of work efficiency during assembly is desired.

In addition, since a large amount of manual labor is required, a wiring failure due to a work error may cause an electric shock or cause a fire due to abnormal heat generation of the connection portion, which is a factor of concern about the safety of the product.

Further, at the time of boiling water, since the current value required for energizing the heating element is large, a considerably large amount of electric power is required in the case of boiling for a long time as described above to reduce the chlorine. This will lead to an increase in electricity charges and will also go against energy conservation.

[0010] Claims 1 to 4 of the present invention are provided in view of the above points, and an inexpensive electric kettle with excellent safety can be realized.

Further, according to a survey of tap water, substances such as trihalomethane and chlorine in the water are not always present in the same amount, but the amount is large in the summer and decreases in the winter. If the boiling time is adjusted accordingly, the efficiency will increase.

The present invention is provided in view of the above points, and an excellent electric water heater with excellent operability and low maintenance cost can be realized.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the first half, the present invention relates to a container for containing a liquid, a heating element for heating and maintaining the temperature of the liquid in the container, an energization control for the heating element, etc. A control board on which a control circuit for performing the above is mounted, and a connection section for taking in electricity from an external power source are provided, and the connection section and the control circuit section are directly connected on the board.

Further, the main body of the connecting portion is fixed to the control board. Also, an external operation switch is provided on the control board.

Further, an external power source is provided on the same substrate as the control substrate on which the container for containing the liquid, the heating element for heating and keeping the temperature of the liquid in the container and the control circuit for controlling the energization of the heating element are mounted. And a connection part for receiving electricity from the control circuit board. The electric wire is connected to the board around the connection part in advance, and when the main body is assembled, the connection part of the control board and the control circuit part are separated and attached.

Further, in order to solve the latter half of the problems described above, the present invention comprises a container for containing a liquid, a heating element for heating and keeping the temperature of the liquid in the container, and a control circuit for controlling energization of the heating element. The mounted control board and the environmental sensor for sensing the environmental temperature of the body of the container are provided to control the energization time to the heating element after the liquid in the container is boiled by the environmental temperature.

[0017]

According to the present invention, the connection means and the control circuit portion are connected to each other on the substrate from the beginning by the above-mentioned first means, and the work of connecting the two to each other can be omitted. Guaranteed and improved in safety.

Further, since the connecting portion main body can be fixed on the substrate by the second means, the position of the connecting portion on the substrate can be ensured, and the electrical connection between the substrate and the connecting portion on the substrate can be further improved. It will be certain.

By the third means, a connection portion, which is an inlet for an external power source, and a switch for external operation are provided on one board, and the lead wires required to connect each and these are connected. The work etc. can be greatly reduced.

The fourth means allows the connection portion and the control circuit portion to be separately mounted, so that the connection portion to the body of the body and the control circuit portion must be mounted separately from each other. Is available.

In addition, by the fifth means, in the summer when the temperature rises, in which a large amount of chlorine is mixed in tap water, the ambient temperature is detected to lengthen the boiling time so that impurities are relatively generated in water. In low winter seasons, low temperatures are detected to shorten the boiling time.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 container for storing liquid, which is liquid-tightly welded to the outer edge of a heat transfer plate 3 having a heating element portion 2 attached to the lower end of the tubular body. It is fixed by means. A pipe-shaped waterproof metal fitting 4 is provided on the bottom surface of the container 1 and is connected to a water pipe 5 which is one of water guiding paths via a bushing 25.

A water pipe bushing having a tipping outflow prevention valve is provided at the tip of the water pipe 5 to reach the tip 6 of the lead-out path through the case. Reference numeral 7 is a body that wraps the container 1 through a space. 8 is a spout placed on the body,
It holds the body together with the hook 9 at the bottom.

A lid 10 is placed on the spout and is supported by a hinge 11. As shown in FIG. 1 when the body is viewed from the bottom, there is a control board 13 set in a holder 12 below the heating element portion 2. On the control board, there are a connecting portion 14 for taking in electricity from an external power source and a control circuit 15, which controls energization of the heating element portion 2 and the like.

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

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

The end portion of the terminal plate 18 is inserted into the hole of the board and fixed by soldering or the like. A pattern of the control circuit section is also provided around the fixed hole so that the connection section 14 directly energizes the control circuit.

The energization of the heating element 2 is controlled by detecting the temperature by a temperature sensor (hereinafter referred to as sensor) 19 provided on the outer side of the bottom surface of the container and controlling the temperature by a control circuit.

The sensors, the thermal fuse, and the heating element are connected to the tabs provided on the substrate by lead wires from the respective parts and faston terminals.

Further, as shown in FIG. 2, if the legs of the connecting portion main body are set in the holes of the board 13, even if the connection between the terminal board and the board is unstable, the connection with the board is made. The part is securely fixed.

On the control board 13, an external operation switch 2 for operating when trying to boil again from the heat retention state.
0 is attached together.

Reference numeral 21 denotes an operating portion, which displays a boiling water condition and a heat retaining condition. FIG. 5 shows the control board according to claim 4. 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.
When assembling the body of the body, divide it at this part and attach it to each place.

In addition, since the electric wire is previously connected to the mounting portion between the substrates by soldering or the like between them, it is only necessary to divide the substrate and mount it at the time of assembly.

Further, the control circuit section 15 includes an environment sensor 2
3 has a function of sending data sent by detecting the ambient room temperature to the timer circuit 24 and controlling the time for boiling the liquid in the container.

That is, after the sensor 19 detects boiling of the liquid, the timer circuit continues boiling for a certain period of time. 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 finished in a relatively short time.

[0037]

As described above, according to the present invention, the control board on which the container for containing the liquid, the heating element for heating and keeping the temperature of the liquid in the container, and the control circuit for controlling the energization of the heating element are mounted. And a connection part that takes in electricity from an external power source,
Since the connection part and the control circuit part are directly connected on the board, the connection part and the control circuit part are connected from the beginning on the board, and the work of connecting them both can be omitted, which saves labor and ensures reliability. The connected state is guaranteed and safety is improved.

Further, since the connecting portion main body is fixed to the control board, the connecting portion main body can be fixed on the board, so that the position of the connecting portion on the board becomes reliable, and the board and the connecting portion board The electrical connection above will be more secure.

In the handling at the time of assembly,
It does not come off. In addition, since a connection portion which is an inlet for an external power source and a switch for external operation are provided on one substrate, the lead wires required for connecting each and the work for connecting these can be greatly reduced.

Further, since the connecting portion and the control circuit portion can be attached separately, it is possible to flexibly cope with the case where the connecting portion to the body of the body and the control circuit portion must be attached separately. Is.

In addition, in the summer when the temperature rises by mixing a large amount of chlorine in the tap water, the ambient temperature is detected to lengthen the boiling time, and in the winter when there are relatively few impurities in the water,
Since it detects low temperatures and shortens the boiling time, it can provide the high-quality hot water by boiling it when necessary. It is designed not to consume useless electricity.

[Brief description of 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 the 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 example.

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

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

[Explanation of symbols]

1 container 2 heating element 13 Control board 14 Connection 15 Control circuit 16 Connection body 20 External operation switch 22 electric wire 23 Environmental sensor

Claims (5)

[Claims] 1. A container for containing a liquid, a heating element for heating and maintaining the temperature of the liquid in the container, a control board on which a control circuit for controlling energization of the heating element is mounted, and electricity is supplied from an external power source. An electric water heater having a connection part to be taken in and having the connection part and the control circuit part directly connected on the substrate. 2. The electric water heater according to claim 1, wherein the connecting portion main body is fixed to the control board. 3. The electric water heater according to claim 1, wherein an external operation switch is provided on the control board. 4. An external power source on the same substrate as a control board on which a container for containing a liquid, a heating element for heating and keeping the liquid in the container and a heat control element, and a control circuit for controlling energization of the heating element are mounted. An electric water heater having a connecting part for taking in electricity from the electric circuit, connecting electric wires to a substrate around the connecting part in advance, and separating and connecting the connecting part of the control board and the control circuit part when the main body is assembled. 5. A container for containing a liquid, a heating element for heating and keeping the temperature of the liquid in the container, a control board on which a control circuit for controlling energization of the heating element is mounted, and an environmental temperature of the body of the body. An electric water heater equipped with an environmental sensor that senses the temperature and controlling the energization time to the heating element after the liquid in the container has boiled depending on the environmental temperature.