JPH0213414A - Electric water boiler - Google Patents

Abstract

PURPOSE:To easily obtain an arbitrary flow rate and to easily conduct operation for controlling the flow rate by disposing a knob for controlling the rotating speed of a pump in a hole portion formed on the nose portion of a main body, and constructing the sliding contact surface between the knob and the hole portion in a specified structure. CONSTITUTION:A knob 16 interlocking with a rotary variable resistor 15 for adjusting the rotating speed of a pump 7 is disposed in a hole portion 25a formed on the nose portion 25. In the sliding contact surface between a flange 27 formed on the lower portion of the knob 16 and the lower end portion 25b of the hole portion 25a, at least one circumferential rib 26 or one or more projecting portions are formed, or a ring-shaped sliding ring 29 made of material having a small coefficient of friction, for example, metal such as stainless steel or the like is disposed between the flange 27 formed on the lower portion of the knob 16 and the lower end portion 25b of the hole portion 25a. Accordingly, the knob 16 is easy to rotate so that the adjustment for operation is easily made. When hands are removed from the knob 16 after operation for rotating the knob, the knob is returned to its initial position by a hook spring, so that it is possible to prevent the hot water from being left to come out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application' The present invention relates to an electric water heater equipped with an electric hot water supply function for heating and keeping a stored liquid warm.

Conventional technology A conventional electric hot water Δ13 water heater with an electric hot water supply function is
For example, in Japanese Utility Model Application No. 60-173247, 3 l<
- The configuration was as shown in Figure 7, as shown in the arrogance. That is, applying an AC voltage to the electromagnetic pump 3o,
By sending pressurized air into the container 31 to increase the pressure inside the container 31, the liquid is led out of the container. Operate to energize the electromagnetic pump 3o to 0N-
It opens and closes the switch 34 that controls OFF, and simply controls whether the liquid is drawn out or the cup is filled.

Problems to be Solved by the Invention In such a conventional configuration, when the liquid in the container 31 is to be drawn out, only a preset constant outflow interval is drawn out, and as a result, for example, a relatively small volume is drawn out. If you pour the hot water into a container with a large capacity, the force will be too strong and the hot water will splash out, potentially causing burns.On the other hand, if you pour it into a large container, it will take a long time and will be difficult to use. There was a problem. In addition, since it is an air pressurization type, it is necessary to close the steam passage when drawing out the liquid, and in this case, a mechanism is required to block the steam passage in conjunction with the suppression operation of the knob 33, which increases the operating load. However, there were problems such as a complicated structure and an increase in cost.

Furthermore, a knob 33 is provided on the lid part 32 to prevent counterfeiting.
When the lid part 32 is removed from the main body 35 to be washed and rinsed, there are problems such as water droplets adhering to the inside of the knob 33 or penetrating therein, wetting electrical parts and causing malfunctions.

The present invention solves these problems by making it possible to easily obtain a desired flow rate, making it easy to adjust the flow rate, and further improving reliability.

The purpose is to provide an electric water heater with increased durability.

Means for Solving the Problems In order to solve the above problems, the electric water heater of the present invention has the following features:
An electric pump that discharges the liquid inside the container to the outside of the container,
It has a pump drive circuit that controls the operation of the pump, and a variable section that constitutes a part of the pump drive circuit and that adjusts the rotational speed of the pump from an external operation tail, and that controls the variable operation of the variable section. Page 5 has a knob that rotates and is interlocked with the rotating motion, and the knob is disposed in a hole formed in the nose of the main body, and a flange is formed at the bottom of the knob.

At least one or more circumferential lips or lips are formed on one or both of the sliding surfaces between the collar and the lower end of the hole.
It has protrusions formed in more than one place.

Further, according to the present invention, a substantially ring-shaped sliding ring is disposed between the flange formed at the lower part of the shaft and the lower end of the hole.

Effect: According to the above configuration, since the variable portion and the interlocking knob perform rotational movement, adjustment during operation is easy. However, there is still some debate as to whether at least one or more circumferential ribs or one or more protrusions should be formed on one or both of the sliding surfaces of the collar and the lower end of the hole. A roughly ring-shaped sliding ring is placed between the flange formed at the bottom of the hole and the bottom end of the hole to apply force, so if the knob is of the self-reversing type, the knob must be rotated. When you let go of your hand, there is less contact between the tsuba and the nose, and the friction is reduced, so it completely returns to its original position. Therefore, there is no chance that the knob will stop halfway and the hot water will not come out. In addition, even if coffee or the like is spilled on the knob, there should be at least one or more circumferential ribs or one or more places on either or both of the sliding surfaces between the collar and the lower end of the hole. , the contact area between the flange of the knob and the lower end of the hole is reduced, and as a result,
Since the influence of the adhesive force of the infiltrated substance can be reduced, it is also possible to prevent the sliding contact portion from becoming hardened and not moving. Furthermore, since the approximately ring-shaped sliding ring is disposed between the flange formed at the bottom of the knob and the lower end of the hole, the flange formed at the bottom of the knob and the sliding surface are free from infiltrated substances. It can also prevent it from getting stuck due to its adhesive strength.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 7.

In FIGS. 3 and 4, 1 is a main body, 2 is a container disposed in the main body 1 and has an open top, and 377, - is a lid that covers the top opening of the container 2. The body 3 can be opened and closed with respect to the opening of the container 2 and can be attached and detached from the main body 1 by pressing a lock knob 4 provided at the front thereof.

5 is a steam passage communicating with the inside of the container 2, and 6 is a steam passageway connected to the inside of the container 2.
It is a heating element that heats the liquid inside. Reference numeral 7 denotes an electric pump, which is driven by a motor 8, and is connected to a guide hole 9 provided at the bottom of the container 2 and a suction port 1o of the pump 7.
The liquid is sucked in through a first communication pipe 11 that communicates with
The liquid is led out of the container via a second communication pipe 14 that communicates with the container.

Reference numeral 15 denotes a rotary variable resistor that constitutes a part of a drive circuit that controls the operation of the pump 7 and is a means for adjusting the rotational speed of the pump 7, that is, a variable part.

Reference numeral 16 denotes a knob that is linked to the variable resistor 15, and this knob 16 constitutes an operating section 17 together with several parts that will be described later.

FIG. 6 1 shows an example of a circuit using a variable resistor 15 as a speed adjusting means for the pump 7. By changing the voltage applied to the motor 8 with the variable resistor 15,
In other words, the 0 rotation speed of the pump 1 is controlled.

1 and 2 show an example of the configuration of the operating section 1γ in detail, and 18 is a knob 16 and a rotary variable resistor 1.
6, and this bearing 18 has a hook spring 28.
One end of the hook spring 28 is attached, and the other end of the hook spring 28 is attached to the mounting plate 19, and the variable resistor 15 is still attached to the mounting plate 19 with a NAND 20. 21 is a switch that turns on and off the power to the motor 8 that drives the pump 7; the button 22 of this switch 21 is connected to the bearing 1;
It is attached in a positional relationship that allows pressure contact with the collar 23 of 8.
The concave part 24 formed in the collar 23 is the button 2 of the switch 21.
2, the button 22 is in a free state, and at this time, the power to the motor 8 is turned off.

The operating section 17 is provided above the nose section 25 that constitutes a part of the main body 1, and the knob 16 is disposed in a hole 25& formed in the nose section 9beno 25. and,
Among the sliding contact surfaces between the flange 27 formed at the lower part of the rib 16 and the lower end 25b of the hole 25 &, the flange 27 has at least one circumferential rib 26 and one or more protrusions (not shown). - Also, a collar 2 formed at the bottom of the knob 16
A substantially ring-shaped sliding ring 29 made of a material with a small friction coefficient, for example, a metal such as stainless steel, is disposed between the lower end portion 26b of the hole portion 25&. Therefore, the change 16
The coefficient of friction at the sliding contact surface between the lower end 25b of the hole 26a becomes smaller, and as a result, the knob 16 becomes easier to rotate, making it easier to adjust the operation.

1. After rotating, if you let go of the knob 16, it will return to the original position without changing the exact size in the middle, so there will be no dripping when hot water comes out, and there will be no wear on the sliding surface. It becomes less.

In the second embodiment, the collar 27 has at least one circumferential rib 26 and one protrusion (not shown).
A substantially ring-shaped sliding ring 2910A is formed between the flange 27 and the lower end 25b of the hole 25a.

Although the structure in which the lip 26 or the protrusion (not shown) is provided, or even if only the substantially ring-shaped sliding ring 29 is provided, the same effect as in the above embodiment can be obtained. Even if the at least one circumferential lip 26j or one or more protrusions (not shown) are formed on the lower end 25b side of the hole 25a as shown in FIG. This has the same effect as the example.

Effects of the Invention As is clear from the description of the above embodiments, in the electric water heater of the present invention, since the variable part and the interlocking knobs perform rotational movement, adjustment during operation is easy.

In addition, at least one or more circumferential lips or one or more places may be formed on one or both of the sliding surfaces between 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. This is because a protrusion is formed or a substantially ring-shaped sliding ring is disposed between the flange formed at the bottom of the knob and the lower end of the hole.

The coefficient of friction 1 between the collar and the lower end of the hole is small, making it easier to adjust, and if the knob is an automatic reversal type, for example, it will not stop midway even if you release your hand after rotating the knob. It returns to its original state without any problems, so there is no risk of burns, etc., so it is highly reliable.

In terms of wear, the sliding surface is slippery, which naturally reduces wear. moreover,
Even if you spill coffee or the like on the knob and it hardens, there should be at least one circumferential surface on either or both of the sliding surfaces between the collar and the bottom of the hole. By forming ribs or one or more protrusions, or by placing a roughly ring-shaped sliding ring between the collar and the lower end of the hole, the influence of the adhesive force of coffee etc. can be avoided. This can prevent the knob from becoming stuck.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts of an electric water heater showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts, Fig. 3 is a longitudinal sectional view of the electric water heater, and Fig. 4 The figure is a perspective view of the electric water heater, Figure 5 is a drive circuit diagram of the motor in the electric water heater, Figure 6 is an enlarged cross-sectional view of the main parts, and Figure 7 is a conventional electric water heater. . It is a longitudinal cross-sectional view of the vessel. 1...Body, 2...Container, 3...Lid, 6...
Heating element, end...Pump, 8...Motor, 15
・Variable resistor (variable part), 16. ・Knob, 17.
...Operation section, 25...Nose section, 25 &... Hole section,
25b...Lower end of hole, 26...Circumferential rib, 27...Brim, 29...Sliding ring. Name of agent Patent attorney Shigetaka Awano and 1 other person A1 t-)G5'- (A) Ll') An I L-1 UX1 To (

Claims (2)

[Claims] (1) A main body, a container disposed within the main body and containing a liquid, a lid covering an opening of the container, a heating element that heats the liquid in the container, and a liquid in the container. an electric pump that discharges the water out of the container; a pump drive circuit that controls the operation of this pump; and a variable section that forms part of this pump drive circuit and that adjusts the rotational speed of the pump by external operation. , the variable operation of the variable part is a rotational movement, and a knob is provided in conjunction with the rotation, the knob is disposed in a hole formed in the nose of the main body, and a flange is formed at the bottom of the knob. An electric water heater, wherein at least one or more circumferential ribs or at least one protrusion is formed on one or both of the sliding surfaces between the collar and the lower end of the hole. (2) A main body, a container disposed within the main body and containing a liquid, a lid covering an opening of the container, a heating element that heats the liquid in the container, and a liquid in the container. an electric pump that discharges the water out of the container; a pump drive circuit that controls the operation of this pump; and a variable section that forms part of this pump drive circuit and that adjusts the rotational speed of the pump by external operation. , the variable operation of the variable part is a rotational movement, and a knob is provided in conjunction with the rotational movement, the knob is disposed in a hole formed in the nose of the main body, and a flange is formed at the bottom of the knob. The electric water heater further includes a substantially ring-shaped sliding ring disposed between the collar and the lower end of the hole.