JPH09117370A - Electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a base board having light emitting bodies by providing a base board holder to hold a part above an end surface of the base board having the light emitting bodies to display the existence of current-carrying to a heating system by a recessed part having a thickness not less than a plate thickness of the base board. SOLUTION: In a cylindrical vessel outer barrel 1, a lower frame 3 is integrally installed on the lower end, and a bottomed vessel 4 is arranged in the vessel outer barrel 1. A heating system 6 integrally enclosing a water heater and a heat reserving heater is arranged in a bottom part of the vessel 4, and a base board 11 having light emitting bodies 12a and 12b to display the existence of current-carrying to this water heater and a fixed resistance is held by a recessed part 16a of a base board holder 16. A display panel 10 which can pass the light of the light emitting bodies 12a and 12b is adhered to the lower frame 3, and the base board holder 16 is fixed to the lower frame 3 by a screw. A passage to which the vessel 4 and a riser are connected each other by using a U-pipe 19 is arranged on an upper surface of the base board holder 16, and the U-pipe 19 is held by a guide part 16d arranged on the base board holder 16.

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 for heating and retaining a contained liquid.

[0002]

2. Description of the Related Art In recent years, electric water heaters for boiling water to keep it warm have become widespread. The substrate 106 provided with the light-emitting body 102 for displaying the presence / absence of energization to the heating device 104 arranged in this electric water heater was attached in a configuration as shown in FIGS. 13, 14 and 15.

That is, the luminous body 1 of the circuit diagram shown in FIG.
02a, 102b, heating device 104, temperature sensing device 10
The substrate 106 on which the electric wire 105 for connecting to the No. 3 is mounted in the hole 107 provided in the lower frame 101.
2b is arranged via a lamp holder 108 for positioning, and a screw 11 is attached to a boss 109 provided on the lower frame 101.
It was fixed using 0 or the like. Also, the electric wire 105 should be attached to the insulation lock 1 so as not to interfere with the assembly work.
It was necessary to bind with 11 or the like.

[0004]

However, in the mounting of such a structure, in order to mount the substrate 106 on the lower frame 101, the lamp holder 108 is temporarily set, then the substrate 106 is set, and the screw 110 is further set. Since it has to be tightened, it is very difficult to assemble, and the tool size is restricted by the size of the inner diameter ΦD of the lower frame 101. Further, in order to integrally provide the boss 109 on the lower frame 101 by resin molding, the structure of the mold becomes complicated, which may increase the cost. Furthermore, bundling the electric wires 105 with the insulation lock 111 has been a factor of labor and cost increase.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional drawbacks and to provide a structure in which a substrate provided with a light-emitting body for indicating whether or not a heating device is energized can be attached very easily and easily. It is a thing.

[0006]

In order to solve the above-mentioned problems, one means of the present invention is to provide a plate having a thickness of two or more end faces of a substrate equipped with a light-emitting body for indicating whether or not a heating device is energized. It is sandwiched between the substrate holder which is held by the above concave portion and the lower frame which is provided with the hole portion for transmitting the light of the light emitting body.

Another means is to hold the two end faces of the substrate in parallel recesses provided in the substrate holder, and to equip the other end face with a recess of substantially the same shape corresponding to the protrusions provided in the substrate holder or the lower frame. It is a thing.

Still another means has a substrate holder provided with a flow path guide to which a water rising pipe for flowing hot water to the outside from a bottom of a container for containing a liquid is connected using an elastic U-shaped pipe. Is.

Still another means is such that a light-emitting body for displaying the presence or absence of energization to the heating device is covered with the substrate holder and the lower frame.

Still another means is to provide a substrate holder having a groove portion having a width equal to or smaller than the outer dimension of an electric wire to be connected to a substrate provided with a light emitting body for indicating whether or not the heating device is energized.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is extremely simple and easy to attach a substrate provided with a light-emitting body for displaying the presence or absence of energization to a heating device, and facilitates the mold construction. By doing so, the cost can be reduced.

According to the second aspect of the present invention, by attaching the substrate holder, it is possible to prevent in advance a mounting error caused during assembly.

According to the third aspect of the present invention, by holding the elastic U-shaped tube by the substrate holder, it is possible to prevent the hot water from coming out of the connected container by an external force applied when the hot water flows out of the container. As a result, the reliability of connection can be improved.

According to the fourth aspect of the present invention, since the light-emitting body is covered with the substrate holder and the lower frame, the light of the light-emitting body that indicates whether or not the heating device is energized has only a hole provided in the lower frame. It can be passed.

According to the fifth aspect of the present invention, since the board holder has the groove portion having a width equal to or smaller than the outer dimension of the electric wire, the electric wire to be connected to the board can be prepared and bound by the board holder.
It is possible to reduce the cost required for binding the electric wires while eliminating the binding work.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 12, reference numeral 1 denotes a cylindrical container outer case, in which a spout 2 is fixed to an upper end opening and a lower frame 3 is integrally attached to a lower end. Reference numeral 4 denotes a bottomed container mounted inside the container outer case 1. The container 4 has a flange portion 4a at the upper end thereof, and is supported by the spout 2 through a container packing 5. The bottom of the container 4 is provided with a heating device 6 that integrally includes a heater 6a for boiling water and a heater 6b for keeping heat. In the vicinity of the heating device 6, temperature detecting means 7 for controlling the heater 6a for boiling water is connected, and a thermal reed switch 8a for controlling the heater 6b for keeping heat is connected in parallel.

Reference numeral 8b is a thermal fuse, which is pressed and held on the bottom surface of the container 4 by a pressing spring 9 together with the thermal reed switch 8a. Reference numeral 11 denotes a light emitting body 12a for displaying the presence or absence of energization to the water heater 6a of the heating device 6,
12b, fixed resistors 13a, 13b, a board provided with electric wires 14, each connection is inserted into a hole 11a provided on the board 11 with a stopper 15 interposed from one direction, and is connected by soldering. The light emitting bodies 12a and 12b are
The position is biased by the long hole 11b. These electric circuits are as shown in FIG.

Reference numeral 16 denotes a substrate holder, which has a thickness t of the substrate 11.
Parallel recesses 16a having a width t2 of 1 or more are provided, and the substrate 11 is held by the substrate holder 16 by the recesses 16a. At this time, the convex portion 16b provided on the substrate holder 16 can guide the upper and lower sides of the substrate 11 to the regular position by the concave portions 11c having substantially the same shape provided on the substrate 11 at the same position. Further, by providing the convex portion 16b at a position other than the center of the substrate 11, the front and back of the substrate 11 can be guided to the normal position. The width A of the groove portion 16c provided in the substrate holder 16 is equal to or less than the outer dimension ΦD of the electric wire 14, and the electric wire 14 can be held by deforming an insulator such as silicon rubber of the electric wire 14. The substrate holder 16 attaches the substrate 11 at the same time as the outer periphery 3c and the bottom surface 3d of the lower frame 3 provided with the rib 3b between the hole 3a for transmitting the light of the light emitters 12a and 12b and the light emitters 12a and 12b. It is designed to be covered and held.

The groove 16c is provided on the component insertion side of the substrate 11 held by the recess 16a, and the depth B of the groove 16c is set to be equal to or larger than the total outer diameter ΦD of the electric wire 14 so that the electric wire 14 can be installed. The lower frame 3 of the electric wire 14 and the board holder 16 are prevented from being bitten.

Reference numeral 10 denotes a display panel capable of transmitting the light of the light emitting bodies 12a and 12b fixed to the lower frame 3 by adhesion or the like, and 17 denotes a screw for fixing the substrate holder 16 to the boss 3d provided on the lower frame 3. is there. Further, on the upper surface of the substrate holder 16, a flow path connecting the container 4 and the water rising pipe 18 using a U-shaped pipe 19 is installed, and the U-shaped pipe 19 is the substrate holder 1
It is held by a guide portion 16 d provided on the No. 6.
Further, the water rising pipe 18 is transparent, and a long hole 1a which can be seen is provided in the outer case 1 of the container, and the water level in the container 4 constitutes a water level gauge. Reference numeral 20 denotes a water level display plate that allows the water rising pipe 18 to be visible and is fixed to the outer container body 1 by adhesion or the like.

Reference numeral 21 denotes a lid body which is attached to the spout 2 so as to be openable and closable, and the lid body 21 has a back portion 21a as a fulcrum and a front end portion 2 thereof.
A lock knob 22 provided at 1b is fixed so as to be openable and closable. Further, a cylindrical portion 21c having an upper surface opening is provided in the central portion of the lid body 21, and a pushing plate 23 which is vertically slidable is provided in the cylindrical portion 21c. Reference numeral 24 denotes a bellows pump provided under the push plate 23, which is hermetically sealed by attaching an upper surface to an upper plate 25 and a lower surface to a lid cover 26 by ultrasonic welding.

Reference numeral 27 denotes a connecting shaft that operates in conjunction with the downward movement of the push plate 23, and is mounted between the movable valve 28 provided at the center of the upper plate 25 and the lid cover 26 with a return coil spring 30 interposed. ing. Reference numeral 31 denotes a steam passage that is continuous with a steam port 21d provided at the rear of the lid body 21 and includes a connecting shaft 27
The valve packing 32 provided at one end of the valve seals the passage between the bellows pump 24 side and the steam passage 31 side in an airtight manner. When the push plate 7 is not operated, the passage on the steam passage 31 side is always connected. Reference numeral 29 is a lid packing for sealing the container 4 and the lid 21.

Next, the operation of the above structure will be described. First, when water is put into the container 4 to start energization,
The heater 6a for heating water and the heater 6b for heat retention of the heating device 6 generate heat, the water in the container 4 is heated, and at the same time, the light emitter 12a is turned on. When the water in the container 4 is heated and the temperature of the water rises, the temperature detecting means 7 and the thermal reed switch 8a turn off the heater 6a for boiling water and the heater 6b for heat retention, respectively, and at the same time, the light emitting body 12a is turned off and emits light. The body 12b starts lighting. Also, container 4
The steam filling the inside passes through the steam passage 31 and is discharged to the outside of the body through the steam port 5d provided at the rear of the lid 21.
After the temperature detecting means 7 is activated once, the heat retaining heater 6
b is operated by the thermal reed switch 8a, the hot water in the container 4 is maintained at a water temperature of about 95 ° C., and the light emitting body 12b keeps lighting until the power supply is stopped.

As described above, while the electric water heater is energized, either the light emitted from the light emitting body 12a or the light emitted from the light emitting body 12b is turned on.
The substrate holder 16 and the lower frame 3 can prevent light emission inside the electric water heater. By this shielding effect,
It is possible to prevent light from the light emitters 12a and 12b from leaking from the water level display plate 20 and to prevent the user from feeling any abnormality. Further, the rib 3b allows the hole 3a of the lower frame 3 to be formed.
It is needless to say that it is possible to surely make one of them emit light.

When the push plate 23 is actuated, the movable valve 27 and the connecting shaft 24 are actuated, and the air in the bellows pump 24 is supplied into the container 4, the internal pressure in the container 4 rises and the container 4 increases.
The hot water inside can be discharged to the outside. At this time, the force F acts in the direction of leaving the U-shaped tube 19 under the influence of the internal pressure in the container 4, but since it is held by the substrate holder 16, the U-shaped tube 19 is prevented from coming off from the container 4. be able to.

[0026]

As described above, according to the first aspect of the present invention, the two or more end faces of the substrate provided with the luminous body for indicating whether or not the heating device is energized are held by the recesses having the plate thickness of the substrate or more. By sandwiching between the substrate holder and the lower frame that has a hole for transmitting the light of the light emitter, extremely simple and easy mounting can be performed, and the die structure can be simplified to reduce the cost. Can be made.

According to the second aspect of the invention, the two end faces of the substrate are held by the parallel recesses provided in the substrate holder,
By providing the other two end faces with the substrate holder or the recesses of substantially the same shape corresponding to the protrusions provided on the lower frame, it is possible to prevent in advance mounting mistakes that occur during assembly.

According to the third aspect of the present invention, there is provided a flow path guide in which a water rising pipe for flowing hot water out of the bottom of the container for containing the liquid is connected using an elastic U-shaped pipe. By providing the substrate holder, it is possible to improve the reliability of the connection by preventing the hot water from coming off from the connected container and the water rising pipe by the external force applied when the hot water flows out of the container.

According to the fourth aspect of the present invention, by displaying the presence or absence of electricity to the heating device by the substrate holder and the lower frame, the presence or absence of electricity to the heating device is displayed. The light of the illuminating body can be transmitted only through the hole provided in the lower frame.

According to a fifth aspect of the present invention, there is provided a substrate holder having a groove portion having a width equal to or smaller than an outer dimension of an electric wire connected to a substrate provided with a light emitting body for indicating whether or not the heating device is energized. As a result, the electric wires connected to the substrate can be easily bundled by the substrate holder, and it is possible to reduce the labor required for bundling and reduce the cost required for binding the electric wires.

[Brief description of the drawings]

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

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

FIG. 3 is a front view of a substrate holder of an electric water heater showing an embodiment of the present invention.

FIG. 4 is a top view of the substrate holder.

[Fig. 5] Bottom view of the substrate holder

FIG. 6 is a side view of the board holder.

FIG. 7 is a front view of a substrate of an electric water heater showing an embodiment of the present invention.

FIG. 8 is a side view of the board.

FIG. 9 is an exploded perspective view showing a mounting structure of a substrate of an electric water heater showing an embodiment of the present invention.

FIG. 10 is a detailed view of a mounting configuration of a substrate of an electric water heater showing an embodiment of the present invention.

FIG. 11 is a diagram showing processing of lead wires of an electric water heater showing an embodiment of the present invention.

FIG. 12 is a circuit diagram of an electric water heater showing an embodiment of the present invention.

FIG. 13 is a detailed cross-sectional view of a board mounting structure of a conventional electric water heater.

FIG. 14 is an exploded perspective view showing a mounting structure of a board of a conventional electric water heater.

FIG. 15 is a circuit diagram of a conventional electric water heater.

[Explanation of symbols]

 1 Container Outer Body 3 Lower Frame 4 Container 6 Heating Device 11 Substrate 12 Light Emitting Body 14 Electric Wire 16 Substrate Holder 18 Water Pumping Tube 19 U-Shaped Tube

Claims (5)

[Claims] 1. A plate of the substrate having two or more end faces of a substrate, which is equipped with a container for containing the liquid, a heating device for heating the liquid in the container, and a light-emitting body for indicating whether or not the heating device is energized. An electric water heater sandwiched by a lower frame having a substrate holder that is held by a recess having a thickness of at least one and a hole that allows the light of the light emitting body to pass therethrough. 2. The substrate is held at its two end faces by a concave portion provided in a substrate holder, and the other end face is provided with a concave portion of substantially the same shape corresponding to the convex portion provided on the substrate holder or the lower frame.
An electric kettle as described. 3. A container for containing a liquid, a flow path connecting a water rising pipe for flowing hot water from the bottom of the container to the outside using an elastic U-shaped pipe, and a guide for the U-shaped pipe. The electric water heater according to claim 1, further comprising a substrate holder. 4. The electric water heater according to claim 1, wherein a light emitting body that indicates whether or not the heating device is energized is covered with a substrate holder and a lower frame. 5. The electric water heater according to claim 1, further comprising a substrate holder having a groove portion having a width equal to or smaller than an outer dimension of an electric wire connected to a substrate having a light emitting body for indicating whether or not the heating device is energized.