JP2668952B2 - Electric water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater having an electric hot water supply function for heating and keeping a stored liquid.

2. Description of the Related Art A conventional electric water heater having an electric hot water supply function is, for example, as shown in Japanese Utility Model Laid-Open No. 60-173247.
The configuration was as shown in FIG. That is, by applying an AC voltage to the electromagnetic pump 30 and sending pressurized air into the container 31 to increase the pressure in the container 31, the liquid is drawn out of the container, and its operating method is: By pressing a knob 33 provided on the lid 32, an electromagnetic pump is
This switch opens and closes a switch 34 for ON-OFF control of energization of the power supply 30, and simply controls whether or not liquid is led out.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional configuration, when the liquid in the container 31 is derived, only a preset constant outflow amount is derived, and as a result, for example, a relatively small volume is obtained. When placed in a large container, the hot water is too strong and hot water may scatter, causing burns.On the contrary, when placed in a large container, it takes time and is not easy to use. . Also, because of the air pressurization type, it is necessary to close the vapor passage when the liquid is led out.In this case, a mechanism that closes the vapor passage in conjunction with the pressing operation of the knob 33 is required, so that the operation load increases, There are problems such as an increase in cost due to the complicated configuration. Furthermore, since the knob 33 is provided on the lid 32, when the lid 33 is removed from the main body 35 and washed, water droplets may adhere to the inside of the knob 33 or may penetrate and wet electrical components, causing malfunction. And the like.

The present invention solves such a problem, and it is possible to easily obtain an arbitrary outflow amount, to easily perform an outflow amount adjustment operation, and to further improve the reliability and durability of the electric water heater. It is intended to provide a vessel.

Means for Solving the Problems In order to solve the above problems, an electric water heater of the present invention includes an electric pump for discharging a liquid in a container to the outside of a body, a pump drive circuit for controlling the operation of the pump, and A variable portion that constitutes a part of this pump drive circuit and that adjusts the rotational speed of the pump by an external operation, and a variable operation of the variable portion is a rotational movement, and a knob that is interlocked with it is provided. This knob is disposed in a hole formed in the nose of the main body, and a flange is formed at the lower portion of the knob, and one or both of the sliding contact surfaces of the flange and the lower end of the hole are provided. At least one or more circumferential ribs or one or more protrusions are formed.

In the present invention, a substantially ring-shaped sliding ring is provided between the flange formed at the lower portion of the knob and the lower end of the hole.

Operation According to the above configuration, since the variable portion and the interlocked knob perform a rotational movement, it is easy to perform adjustment during operation. Also,
At least one or more circumferential ribs or one or more protrusions are formed on one or both of the sliding surfaces of the flange and the lower end of the hole, or a flange formed at the lower part of the knob. Since a substantially ring-shaped sliding contact ring is arranged between the lower end of the hole and the knob, if the knob is an automatic reversing method, after turning the knob, if you release your hand, the collar and nose Since there are few parts that come into contact with and friction is small, it completely returns to the original position. Therefore, the knob does not stop on the way and the hot water does not remain. Also, even if you spill coffee etc. on the knob part,
Since at least one or more circumferential ribs or one or more protrusions are formed on one or both of the sliding contact surfaces between the flange and the lower end of the hole, the flange and hole of the knob are formed. Since the contact portion with the lower end portion of the is reduced, and as a result, the influence of the adhesive force of the infiltrated substance can be reduced, it is also possible to prevent the sliding contact portion from solidifying and becoming immobile. Furthermore, since the substantially ring-shaped sliding ring is provided between the flange formed at the lower part of the knob and the lower end of the hole, the material formed by the penetration of the flange formed at the lower part of the knob and the sliding contact surface. Can be prevented from becoming stuck due to the adhesive force of

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

In FIGS. 3 and 4, 1 is a main body, 2 is a container which is disposed in the main body 1 and has an upper surface opened, and 3 is a lid which covers an upper opening of the container 2. By pressing a lock knob 4 provided at the front part thereof, opening and closing with respect to the opening of the container 2 and attachment and detachment with respect to the main body 1 are possible.

Reference numeral 5 is a vapor passage communicating with the inside of the container 2, and 6 is a heating element for heating the liquid in the container 2. Reference numeral 7 denotes an electric pump, which is driven by a motor 8 and has a guide hole 9 provided in the lower part of the container 2 and a suction port 10 of the pump 7.
A liquid is sucked in through a first communication pipe 11 that communicates with
Further, the liquid is discharged to the outside of the body through a second communication pipe 14 that communicates the discharge port 12 of the pump 7 and the outlet 13 to the outside of the body.

Reference numeral 15 is a rotary variable resistor that constitutes a part of a drive circuit that controls the operation of the pump 7 and that adjusts the rotation speed of the pump 7, that is, a rotary variable resistor that is a variable portion.
Reference numeral 16 denotes a knob that communicates with the variable resistor 15, and this knob 16 constitutes an operation unit 17 together with some components described later.

FIG. 5 shows an example of a circuit using the variable resistor 15 as the speed adjusting means of the pump 7. By changing the voltage applied to the motor 8 with the variable resistor 15, the motor 8, that is, the pump 7 is shown. Is to control the rotation speed.

FIGS. 1 and 2 show an example of the configuration of the operation unit 17 in detail. Reference numeral 18 denotes a bearing interlocked with a knob 16 and a rotary variable resistor 15. This bearing 18 has one end of a hook spring 28. Is attached, and the other end of the hook spring 28 is attached to the attaching plate 19, and the variable resistor 15 is attached to the attaching plate 19 with the nut 20. Reference numeral 21 denotes a switch for turning on and off the power supply to the motor 8 for driving the pump 7.
The button 22 is mounted in a positional relationship such that the button 22 can be pressed against the flange 23 of the bearing 18. When the recess 24 formed in the flange 23 is positioned on the button 22 of the switch 21, the button 22 is in a free state. At this time, the power supply to the motor 8 is turned off.

The operation unit 17 is provided above a nose 25 that forms a part of the main body 1, and the knob 16 is provided with a hole 25 formed in the nose 25.
Located in a. Of the sliding contact surface between the flange 27 formed below the knob 16 and the lower end 25b of the hole 25a, the flange 27 has at least one circumferential rib 26 or one or more protrusions (not shown). ), And a substantially ring-shaped sliding contact ring made of a material having a small coefficient of friction, for example, a metal such as stainless steel, is provided between a flange 27 formed below the knob 16 and a lower end 25b of the hole 25a. 29 are arranged. Therefore, the friction coefficient in the sliding contact surface between the knob 16 and the lower end portion 25b of the hole 25a becomes small, and as a result, the knob 16 is easily rotated,
Operation adjustment is easy. Further, if the user releases the hand from the knob 16 after the rotation operation, it returns to the original position without stopping halfway, so that the hot water does not run out and wear on the sliding contact surface is reduced.

In the above embodiment, at least one circumferential rib 26 or one or more protrusions (not shown) is formed on the flange 27, and between the flange 27 and the lower end 25b of the hole 25a. The configuration in which the substantially ring-shaped sliding ring 29 is provided has been described.
The same effect as that of the above embodiment can be obtained by using only the protrusion 26 (not shown) or the substantially ring-shaped sliding ring 29 alone. Also said at least one circumferential rib
Even if 26 or one or more protrusions (not shown) are formed on the lower end 25b side of the hole 25a as shown in FIG. 6, the same effect as in the above embodiment can be obtained.

EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, in the electric water heater of the present invention, the variable portion and the interlocking knob perform the rotational movement, and therefore the adjustment at the time of operation is easy. In addition, at least one or more circumferential ribs or one or more circumferential ribs are provided on one or both of the sliding surfaces of the flange formed at the lower part of the knob and the lower end of the hole formed at the nose of the main body. Since a protrusion is formed or a substantially ring-shaped sliding ring is arranged between the flange formed at the bottom of the knob and the lower end of the hole,
The coefficient of friction between the flange and the lower end of the hole is small, easy to adjust, and if the knob is, for example, an automatic reversing method, after rotating the knob, even if you release your hand, it will return to its original position without stopping midway Therefore, there is no such thing as hot water leaving
The reliability is high because there is no danger of burns.

Also, with respect to wear, since the sliding contact surface easily slips, the wear can be naturally reduced. Furthermore, even if coffee or the like is spilled on the knob portion and it is hardened, at least one or more circumferential surfaces are provided on one or both of the sliding surfaces of the flange and the lower end of the hole. Or one or more projections, or a substantially ring-shaped sliding ring is provided between the flange and the lower end of the hole, so that the influence of the adhesive force of coffee or the like is reduced. It is possible to prevent the knob from becoming stuck.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an essential part of an electric water heater showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the essential part, FIG. 3 is a longitudinal sectional view of the electric water heater, FIG. Fig. 5 is a perspective view of the electric water heater, Fig. 5 is a drive circuit diagram of a motor in the electric water heater, Fig. 6 is an enlarged cross-sectional view of the main part, and Fig. 7 is a longitudinal section of the conventional electric water heater. FIG. 1 ... Main body, 2 ... Container, 3 ... Lid, 6 ... Heating element,
7 ... Pump, 8 ... Motor, 15 ... Variable resistor (variable part), 16 ... Knob, 17 ... Operation part, 25 ... Nose part, 25a
... hole, 25b ... lower end of hole, 26 ... circumferential rib, 27 ... flange, 29 ... sliding ring.

 ───────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takafumi Yonera 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 112605 (JP, U)

Claims (2)

(57) [Claims] 1. A main body, a container which is disposed in the main body and stores a liquid, a lid which covers an opening of the container, a heating element which heats the liquid in the container, and the inside of the container. Electric pump for discharging the liquid of the above item to the outside of the body, a pump drive circuit for controlling the operation of this pump, a part of this pump drive circuit, and a variable for adjusting the rotational speed of the pump by an external operation. A variable operation of the variable portion is set to a rotational motion, and a knob is provided in conjunction therewith, the knob is disposed in a hole formed in a nose portion of the main body, and a flange is provided below the knob. An electric water heater having at least one or more circumferential ribs or at least one protrusion formed on one or both sliding surfaces of the flange and the lower end of the hole. 2. A main body, a container which is disposed in the main body and stores the liquid, a lid which covers an opening of the container, a heating element which heats the liquid in the container, and the inside of the container. Electric pump for discharging the liquid of the above item to the outside of the body, a pump drive circuit for controlling the operation of this pump, a part of this pump drive circuit, and a variable for adjusting the rotational speed of the pump by an external operation. And a knob for rotating the variable operation of the variable portion and interlocking with the rotation, providing the knob in a hole formed in the nose of the main body, and a flange below the knob. An electric water heater having a substantially ring-shaped sliding ring disposed between the flange and the lower end of the hole.