JPH0698096B2 - Electric water heater - Google Patents

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 retaining the contained liquid.

BACKGROUND ART A conventional electric water heater having an electric hot water supply function is disclosed in Japanese Utility Model Laid-Open No. 173247/1985, namely,
As shown in FIG. 6, an alternating voltage is applied to the electromagnetic pump 51, and the pressurized air from the electromagnetic pump 51 is sent into the container 52 to increase the pressure in the container 52, and the liquid in the container 52 is removed from the outside of the body. The method of operating is to press the knob 54 provided on the lid 53 to open and close the switch 55 for ON / OFF controlling the energization of the electromagnetic pump 51. That is, it was a control as to whether or not the liquid should be discharged.

Problems to be Solved by the Invention In such a conventional configuration, when the liquid in the container 52 is discharged, since it is discharged only at a preset constant outflow amount, for example, a coffee cup or the like is comparatively discharged. When putting it in a small capacity container, the momentum is too strong and there is a risk of boiling water splashing, and on the contrary, when putting it in a large capacity container such as copper, it will take time and usability. There was a problem of being bad.

Further, since it is an air pressurization type, it is necessary to close the vapor passage at the time of liquid discharge, and in this case, since a mechanism for closing the vapor passage in conjunction with the pressing operation of the knob 54 is required, the operating load becomes large or complicated. With such a configuration, there is a problem such as an increase in cost. Furthermore, since the knob 54 is provided on the lid portion 53, when the lid portion 53 is removed from the main body 56 and washed, water droplets may adhere to the inside of the knob 54 or it may cause malfunction due to infiltration. There was a risk of becoming.

An object of the present invention is to provide an electric water heater that solves the above problems.

Means for Solving the Problems In order to solve the above problems, the present invention constitutes a part of a drive circuit for controlling the operation of an electric pump, and adjusts the rotational speed of the pump by an external operation. It has a variable part, and the variable operation of this variable part is a rotary motion, and a knob linked to this variable part is connected, and this knob is formed on the water heater main body (hereinafter abbreviated as the main body) It is arranged in a hole having a diameter slightly larger than the diameter.

Effect According to the above configuration, since the variable portion and the knob interlocking with the variable portion rotate, it is possible to easily adjust the amount of liquid to be discharged at the time of pouring the liquid, and the force is strong as in the conventional case. There is no danger of the hot water spattering and scalding, and since the end surface of the hole formed in the main body is close to the outer surface of the knob, excessive force is applied laterally when operating the knob. However, the force can be received by the end face of the hole, and as a result, it is possible to prevent a large force from being applied to the variable portion, so that the variable portion can be prevented from being damaged. Further, since the main body is provided with the variable portion and the knob, even if the lid body is washed with water, there is no risk of water droplets adhering to or entering the inside of the knob.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 3 is a vertical sectional view of an electric water heater according to an embodiment of the present invention, and FIG. 4 is a perspective view of the electric water heater. In FIG. 3 and FIG. Body,
Reference numeral 2 is a container having an upper surface opening arranged in the main body 1 and containing a liquid therein. 3 is a lid for covering the upper opening of the container 2,
The lid body 3 can be opened and closed with respect to the opening of the container 2 and can be attached to and detached from the main body 1 by pressing a lock knob 4 provided at the front portion. 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. An electric pump 7 is driven by a motor 8 and is provided with a guide hole 9 provided in the lower portion of the container 2.
First communication pipe 11 that connects the suction port 10 of the pump 7 with the suction port 10 of the pump 7.
The liquid is sucked in via the second communicating pipe 14 that connects the discharge port 12 of the pump 7 and the outlet port 13 outside the container to the outside of the container. Reference numeral 15 is a variable portion 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. The variable portion 15 is composed of a rotary variable resistor. Reference numeral 16 denotes a knob that is interlocked 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 in which the variable section 15 composed of a variable resistor is used as the speed adjusting means of the pump 7, and the voltage applied to the motor 8 is changed by the variable section 15 composed of a variable resistor. Is used to control the rotation speed of the motor 8, that is, the pump 7.

1 and 2 show in detail an example of the configuration of the operating portion 17, in which 18 is a bearing that is interlocked with the knob 16 and the variable portion 15 composed of a rotary variable resistor. The variable portion 15 composed of is attached to a mounting plate 19 with a nut 20. 21 turns on and off the power to the motor 8 that drives the pump 7.
In the switch, the button 22 is attached so as to press-contact with the collar 23 of the bearing 18, and when the recess 24 formed in the collar 23 is located on the button 22 of the switch 21,
The button 22 is in a free state, at which time the power to the motor 8 is turned off.

The operation portion 17 is provided above the nose portion 25 forming a part of the main body 1, and the knob 16 is provided in a hole portion 26 formed in the nose portion 25. The diameter of the hole 26 is slightly larger than the outer diameter of the knob 16, and by doing so, even when an unreasonable force is applied in the lateral direction when the knob 16 is rotated, Since the force can be received by the end surface of the hole portion 26, a large force is not applied to the operating portion 17, and as a result, the operating portion 17 can be prevented from being damaged.

Further, in this embodiment, the collar 27 is formed in the lower portion of the knob 16, and when the knob 16 is rotated, the collar 27 and
Since the inner surface 28 around the hole 26 is arranged so as to be in sliding contact with the inner surface 28, the knob 16 does not come off from the bearing 18 even if an incorrect operation such as pulling the knob 16 upward is performed. is there.

EFFECTS OF THE INVENTION As is clear from the description of the above embodiments, the electric water heater of the present invention constitutes a part of the drive circuit that controls the operation of the electric pump, and controls the rotational speed of the pump by an external operation. It has a variable part to adjust, and the variable motion of this variable part is made into rotary motion, and the knob linked to this variable part is connected.This knob is formed on the main body and is slightly larger than the outer diameter of the knob. Since the variable part and the knob interlocking with this variable part are arranged in a hole having a different diameter, it is possible to easily adjust the withdrawal amount at the time of pouring the liquid and There is no danger of hot water spattering and burns due to splashing, and the end face of the hole formed in the main body is close to the outer surface of the knob, so when operating the knob, move it sideways. Even if unreasonable power is added, The force can be received by the end surface of the hole, and as a result, it is possible to prevent a large force from being applied to the variable part, so it is possible to prevent damage to the variable part, and also to arrange the variable part and knob on the main body. Therefore, even if you wash the lid with water,
There is no risk of water droplets adhering to or entering the inside of the knob, and there will be no possibility of causing a malfunction as in the conventional case.

[Brief description of 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 same part, FIG. 3 is a vertical sectional view of the electric water heater, and FIG. FIG. 5 is a perspective view of the electric water heater, FIG. 5 is a motor drive circuit diagram of the electric water heater, and FIG. 6 is a vertical sectional view showing a conventional electric water heater. 1 ... Main body, 2 ... Container, 3 ... Lid, 6 ... Heating element,
7 ... Electric pump, 15 ... Variable part, 16 ... Knob,
17 …… Operation part, 26 …… Hole part, 27 …… Brim.

Claims (2)

[Claims] Claim: What is claimed is: 1. A water heater main body, and
And a container for containing the liquid, a lid for covering the opening of the container, a heating element for heating the liquid in the container, an electric pump for discharging the liquid in the container to the outside of the container, and this pump And a drive circuit that controls the operation of the drive circuit, and a variable part that constitutes a part of the drive circuit and that adjusts the rotational speed of the pump by an external operation, and the variable operation of the variable part is rotational movement, and Connect the knob linked to this variable part,
An electric water heater in which this knob is arranged in a hole having a diameter slightly larger than the outer diameter of the knob formed in the water heater body. 2. A patent in which a knob has a collar formed at a lower portion, and when the knob is rotated, the collar and the inner surface around the hole formed in the water heater body are in sliding contact with or close to each other. The electric water heater according to claim 1.