JPH0655194B2 - 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.

2. Description of the Related Art A conventional electric water heater having an electric hot water supply function applies an AC voltage to an electromagnetic pump 51 shown in FIG. 6, for example, as disclosed in Japanese Utility Model Laid-Open No. 173247/1985. The pressurized air generated by the pump 51 is stored in the container 52.
A method is used in which the liquid is sent out into the container 52 to increase the pressure in the container 52 and draw the liquid out of the container. The operation method is to push a knob 54 provided on the lid 53 to push the electromagnetic pump 51. The switch 55 for controlling ON / OFF of energization is opened / closed, and it is a control of whether or not to lead out the liquid.

Problems to be Solved by the Invention With such a conventional configuration, when the liquid in the container 52 is discharged, the liquid is discharged only at a constant outflow amount set in advance. When putting it in a large capacity container, the momentum is too strong and the hot water may scatter and cause burns. Conversely, when putting it in a large capacity container such as a pot, it takes time and is inconvenient. was there.

Also, since it is an air pressurization type, it is necessary to close the vapor passage when discharging the liquid.In this case, a mechanism that closes the vapor passage in conjunction with the pressing operation of the knob is required, and the operating load becomes large and the complicated configuration However, there were problems such as high cost. Further, since the knob 54 is provided on the lid portion 53, when the lid portion 53 is removed from the main body and washed, water droplets may adhere to the inside of the knob 54 or may penetrate into the knob 54, causing malfunction. There was a fear.

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-mentioned conventional problems, the present invention provides a means for adjusting the rotation speed of an electric pump by an external operation, that is, a variable operation of a variable portion in a drive circuit of the pump. On the upper part of a substantially box-shaped case with a lower surface opened,
A hole through which the rotary shaft of the variable part passes is formed, and while the rotary shaft is outside the case, the variable part is fixed and stored, and a knob interlocking with it is connected to cover the opening of the case. It is covered by.

Action According to the above configuration, since the variable portion and the interlocking knob are rotational movements, adjustment during operation is easy to perform, and the case for accommodating the variable portion has the lower surface as an opening and the upper and side surfaces of the case. Since the rotary shaft of the variable part has almost no gap other than the hole that goes out of the case, there is almost no effect on the variable part due to water droplets etc. infiltrating from the gap between the water heater body and the knob. Is what you can do.

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 showing the appearance of the electric water heater. In FIGS. 3 and 4, 1 is a Water heater body, 2 is a container with an upper surface opening arranged in the body 1, 3
Is a lid that covers the opening of the container 2, and the lid 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 thereof. . 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 sucks the liquid through a first communication pipe 11 that connects a guide hole 9 provided in the lower portion of the container 2 and a suction port 10 of the pump 7, The liquid is led to the outside of the body through a second communication pipe 14 that connects the discharge port 12 of the No. 2 and the outlet 13 to the outside of the body. Reference numeral 15 is a part of a drive circuit that controls the operation of the pump 7, and is a means for adjusting the rotation speed of the pump 7, that is, a rotary variable resistor that is a variable part.
Reference numeral 16 denotes a knob that is interlocked with the variable resistor 15, and the 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 a 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. It controls the rotation speed of.

FIG. 1 and FIG. 2 show an example of the configuration of the operating portion 17, and reference numeral 18 is a bearing which is interlocked with the knob 16 and the rotary variable resistor 15. Reference numeral 19 is a case for accommodating the variable resistor 15. The case 19 is formed in a substantially box shape with an open lower surface, and a hole portion 21 through which the rotary shaft 20 of the variable resistor 15 passes is formed in the upper portion. . The variable resistor 15 is inserted into the case 19 from below, and is fixed to the hole 21 by a nut 22. A cover 23 covers the opening of the case 19. Reference numeral 24 is a switch for turning on and off the power supply to the motor 8 for driving the pump 7. The arm 25 formed on the bearing 18 is attached to the case 19 in such a positional relationship that the arm 25 is pressed against the lever 26 of the switch 24. When the knob 16 is rotated and the projection 25 of the bearing 18 interlocking with the knob 16 is pressed against the lever 26 of the switch 24, the power supply to the motor 8 is off. Knob 1
When 6 is rotated in the opposite direction, the lever 26 of the switch 24 becomes free, the power to the motor 8 is turned on, and the rotary shaft 20 of the variable resistor 15 rotates in conjunction with the knob 16. Then, the resistance value changes, and the voltage applied to the motor 8 rises accordingly, and the pump 7
The number of rotations of increases. By adjusting the angle of the knob 16, the number of rotations of the pump 7 is adjusted so that the amount of liquid to be discharged is in a desired state.

The operation unit 17 is configured by the above components, and the operation unit 17 is attached to the main body 1 in a state where the knob 16 is arranged in the hole 27 formed in the main body 1.

In such a configuration, since the knob 16 is rotatable by an external operation, a slight gap is required between the hole 27 of the main body 1 and the outer circumference of the knob 16, and here What is worried is that water or the like may enter through the gap and adversely affect the operation unit 17, especially the variable resistor 15.

However, in one embodiment of the present invention, the variable resistor 1
The case 19 for accommodating 5 has an opening on the lower surface, and a hole 21 for allowing the rotary shaft 20 of the variable resistor 15 to pass through is provided on the upper part thereof.
Since the hole 21 is configured such that the rotating shaft 20 is fastened with the nut 22, the gap is eliminated. Therefore, even if water or the like enters from the gap between the knob 16 and the water heater body 1, there is almost no possibility of entering water into the case 19.

Further, in this embodiment, since the flange 18 is formed in the bearing 18 so as to cover the rotary shaft 20 of the variable resistor 15 from above, water or the like is prevented from adhering to the rotary shaft 20 outside the case 19. In addition, the waterproof property is improved.

EFFECTS OF THE INVENTION As is apparent from the description of the above embodiments, in the electric water heater of the present invention, the variable portion for adjusting the rotation speed of the pump and the knob have a rotary motion, and the case for storing the variable portion has the lower surface opened. As a part, a hole is formed in the upper part of the case that allows the rotary shaft of the variable part to pass through, so it is easy to make fine adjustments to the amount of liquid drawn out, and also from the gap between the knob and the water heater body. Even if water or the like enters, it does not adhere to the variable portion in the case, and as a result, malfunctions or the like do not occur.

[Brief description of drawings]

FIG. 1 is an enlarged 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, and FIG. 3 is a longitudinal sectional view of the entire water heater. FIG. 5 is a perspective view of the entire appearance of the water heater, FIG. 5 is a motor drive circuit diagram of the water heater, and FIG. 6 is a vertical sectional view of an electric water heater showing a conventional example. 1 …… water heater body, 2 …… container, 3 …… lid, 6 ……
Heater, 7 ... Pump, 15 ... Variable resistor (variable part), 16 ... Knob, 17 ... Operating part, 18 ... Bearing, 19 ... Case, 20 ... Rotating shaft, 21 ... Hole Department,
23 ... cover, 28 ... collar part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiki Hama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

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 A drive circuit for controlling the operation of, and a variable part that constitutes a part of this drive circuit and adjusts the rotation speed of the pump by an external operation, and the variable operation of the variable part is a rotational movement, and the lower surface is A hole portion through which the rotation shaft of the variable portion passes is formed in the upper portion of the opened substantially box-shaped case, and the rotation shaft is
An electric water heater in which the variable portion is fixedly housed in a state of being outside the case, a knob interlocking with the variable portion is connected, and an opening of the case is covered with a cover. 2. A bearing, which is interlocked with a rotary shaft of a knob and a variable portion and transmits a rotary motion applied to the knob to the variable portion, wherein a flange portion is formed on the bearing to cover the variable portion. An electric water heater according to claim 1.