JPH0638772B2 - Electric water heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric water heater having an electric hot water supply function for heating and retaining the contained liquid.

<Prior Art> A conventional electric water heater with an electric hot water supply function
As shown in the figure, "No. 60-173247", the electromagnetic pump 5
A method of applying an AC voltage to 1 and sending pressurized air into the container 52 to increase the pressure inside the container 52 and discharging the liquid out of the body is used, and the operation method is provided in the lid portion 53. Press the knob 54 to turn on the electromagnetic pump 51 to 0N-0.
The switch 55 for FF control is opened and closed, and it is a control as to whether or not the liquid is discharged.

<Problems to be Solved by the Invention> In such a conventional configuration, when the liquid in the container is led out, it is led out only at a preset constant outflow amount. When putting it in a small capacity container, the momentum is too strong and the hot water may scatter and cause burns, or conversely, when putting it in a large capacity container such as a pot, it takes time and is inconvenient to use. There was such a problem.

<Means for Solving Problems> In order to solve such problems, the present invention provides a means for adjusting the rotation speed of an electric pump by an external operation, that is,
The variable operation in the drive circuit of the pump is set to a rotary motion, and a knob interlocked with the rotary motion is provided.When the knob is not operated, the rotary speed of the pump is substantially zero or the knob is located at a completely stopped state. And the variable portion interlocked with it is biased by the biasing means, the knob is made slidable in the direction of the rotation axis, and the position is repeated at substantially both ends of the sliding position for each pressing operation. It is designed to be retained.

<Operation> According to the above-mentioned configuration, the speed of the pump, that is, the position of the variable portion that adjusts the amount of liquid derived per unit time, which is proportional to the speed, is biased by the biasing means, and the rotation speed of the pump when not operated. In order to stop the operation, that is, the derivation of the liquid, by merely setting the state of substantially zero or completely stopped, it is only necessary to remove the hand from the knob. Further, since the operation of the knob is a rotational movement, it is easier to perform fine adjustment than the linear operation. Further, by repeatedly holding the position at both ends of the sliding position each time the knob is pressed, for example, if the knob is held in a position where it is almost housed in the main body when the knob is pushed in, In that state, since the knob cannot be operated, there is no accidental operation, and it is even safer, and the appearance can be clean without any unevenness.

<Embodiment> An embodiment of the present invention will be described below with reference to FIGS. 1 to 9.

FIG. 2 is a longitudinal sectional view of the electric water heater in this embodiment, and FIG. 3 is a perspective view showing the appearance thereof. In FIGS. 2 and 3, 1 is a main body, 2 is a container with an upper surface opening arranged in the main body, 3 is a lid that covers the opening of the container 2, and presses a lock knob 4 provided at the front thereof. By operating it, it is possible to open and close the opening of the container 2 and attach and detach it to and from the main body 1. 5 is a steam passage communicating with the inside of the container 2,
A heating element 6 heats 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 to the pump 7. Second communication pipe that connects the discharge port 12 of the container and the outlet 13 to the outside of the body
The liquid is discharged to the outside of the body via 14. Reference numeral 15 is a rotary variable resistor which constitutes a part of a drive circuit for controlling the operation of the pump 7 and which is a means for adjusting the rotation speed of the pump 7, that is, a variable portion. Reference numeral 16 denotes a knob that is interlocked with the variable resistor 15, and constitutes an operation unit 17 together with some components described later.

FIG. 4 shows an outline of a circuit in which the variable resistor 15 is used as the speed adjusting means of the pump 7. By changing the voltage applied to the motor 8 with the variable resistor 15, It controls the rotation speed.

FIG. 1 shows an example of the configuration of the operation unit 17. In FIG. 1, reference numeral 18 denotes a shaft body attached inside the knob 16, and a groove portion 19 is formed on a side surface thereof. Reference numeral 20 is a bearing having a guide portion 21 that substantially slides on the shaft body 18. 22 Knob 16
A first spring arranged between the bearing 16 and the bearing 20 always urges the knob 16 and the shaft 18 upward. 23 and 24 are both stoppers and stopper retainers attached to the bearing 20, and the stopper 23 is urged by the stopper retainer 24 so that one end thereof is always brought into pressure contact with the groove portion 19 of the shaft body 18 with a slight force. . Reference numeral 15 is the above-mentioned variable resistor mounted on the mounting plate 25 with the nut 26, and its rotary shaft 27 is fitted with the bearing 20 so that both rotate in conjunction with each other. Reference numeral 28 is a second spring having one end attached to the mounting plate 25 and the other end attached to the bearing 20, and biases the rotation of the bearing 20 and the rotary shaft 27 of the variable resistor 15 interlocking with the bearing 20 in one direction. 29 turns on and off the power to the motor 8 that drives the pump 7.
It is a switch for FF, and its button 30 is attached to the mounting plate 25 so as to come into pressure contact with the flange 31 of the bearing 20.
When the recessed portion 32 formed on the switch 29 is located on the button 30 of the switch 29, the button 30 is in the free state.

The operation part 17 is made up of the above parts, and the mounting plate
By attaching 25 to the boss 33 formed on the main body 1,
The knob 16 is a part of the exterior of the body.

FIG. 5 shows the shape of the groove portion 19 of the shaft body 18, the path of which is closed and the bottom portion is formed with a plurality of steps.
The vertical relationship of the step is in one direction, and when the stopper 23 moves in pressure contact with the groove portion 19 by the stopper presser 24, the movement is always counterclockwise in this case. Now shaft 18
Is always urged upward by the first spring 22, so that the position is maintained at the sliding position of the shaft 18 when the end portion 34 of the stopper 23 is located at the points a and b. Therefore, every time the knob 16 is pressed, the end portion 34 of the stopper 23 is alternately held at the points a and b.

FIG. 6 and FIG. 7 show a state when not operated, in which the knob 16 is pushed in and the end portion 34 of the stopper 23 is located at the point a (FIG. 5) of the groove portion 19 of the shaft body 18. Is held. At this time, since the bearing 20 is biased in one direction by the second spring 28 in the rotational position, the rotary shaft 27 of the variable resistor 15 which is interlocked with the bearing and the knob 16 which is interlocked with the rotation are also in the rotational range. Held at one end of. If the resistance value of the variable resistor 15 is set to zero or substantially zero at this position, the voltage applied to the motor 8 becomes zero or substantially zero and the pump 7 does not operate. At this time, if the concave portion 32 formed in the flange 31 of the bearing 20 is positioned above the button 30 of the switch 29, the power to the motor 8 is turned off,
Completely stopped. In this state, if the upper surface 35 of the knob 16 is set to be substantially flush with the periphery of the knob 16 of the main body 1, the body can have a clean design with less unevenness, and the knob 16 can be operated. Since it is not possible, accidents due to unexpected operations can be prevented.

Fig. 8 and Fig. 9 show the state at the time of operation, the knob
16 protrudes from the main body 1, and the end 34 of the stopper 23 is the shaft 18
The groove 19 is held in a state of being located at the point b (FIG. 5). If knob 16 is rotated slightly in this state, switch 29
The button 30 of the is released from the recess 32 of the collar 31 of the bearing 20,
When pressed by 31, the power to the motor 8 is turned on and the knob 16 is further rotated, the bearing 20 and the variable resistor 15
The rotating shaft 27 of FIG. 2 is interlocked, and the voltage applied to the motor 8 increases as the resistance value changes, and the rotation speed of the pump 7 increases. By adjusting the rotational position of the knob 16, the amount of liquid to be discharged from the container 2 can be selected according to the purpose and preference.

When the delivery of the liquid is stopped, if the hand is released from the knob 16, the second spring 28 biases the knob 16 and the bearing.
20, the rotary shaft 27 of the variable resistor 15 automatically returns to one end of the rotation range, the switch 29 also turns off, and the pump 7 stops completely. If the knob 16 is pressed again, the sixth
The state shown in FIG. 7 and FIG. 7 is obtained.

<Effects of the Invention> As is apparent from the above-described embodiments, the electric water heater of the present invention uses the rotational movement of the variable portion that adjusts the rotational speed of the pump, that is, the amount of liquid discharged per unit time. , It is possible to obtain an arbitrary amount of derivation by rotating the knob when projecting and retracting the knob that interlocks with it for each pressing operation and rotating the knob when projecting, and when you want to stop the deduction, simply move your hand. You only have to separate it, and since the knob cannot be operated during storage, accidents due to unexpected operation can be prevented. Further, the state of whether or not it can be derived can be visually appealed, and the appearance can be made into a clean shape with little unevenness, which has many effects in terms of usability, safety, design, and the like.

[Brief description of drawings]

FIG. 1 is an enlarged exploded perspective view of an essential part showing an embodiment of the present invention,
FIG. 2 is a vertical sectional view of the electric water heater of the same embodiment, FIG. 3 is a perspective view showing the same appearance, FIG. 4 is a motor drive circuit diagram of the same embodiment, and FIG. 6 is an enlarged cross-sectional view showing the shape of the groove portion of the shaft body that is a component of the portion, FIG. 6 is an enlarged cross-sectional view of the main portion when not operated, and FIG. 7 is a perspective view of the main portion.
FIG. 8 is an enlarged cross-sectional view of the main part during operation, FIG. 9 is a perspective view of the main part, and FIG. 10 is a vertical cross-sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Container, 7 ... Pump, 8 ... Motor, 15 ... Variable resistor, 16 ... Knob, 17 ... Operation part, 19 ... Shaft groove part,
20 ... Bearing, 21 ... Bearing guide part, 22 ... First spring, 23 ... Stopper, 24 ... Stopper retainer, 28 ... Second spring, 29 ... Switch, 31 ... Bearing brim.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keiki Hama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-290527 (JP, A)

Claims (1)

[Claims] 1. A main body, a container for containing a liquid disposed in the main body, a heating element for heating the liquid in the container, and an electric pump for discharging the liquid in the container to the outside of the container. A drive circuit that controls the operation of the pump, and a variable portion that constitutes a part of the drive circuit and adjusts the rotational speed of the pump by an external operation, and the variable operation of the variable portion is defined as rotational movement, and is linked to it. A knob is provided, and when the knob is not operated, the knob and the variable portion interlocked with the knob are urged to a position where the rotation speed of the pump is substantially zero or a completely stopped state, and An electric water heater in which the knob is slidable in the direction of its rotation axis, and the position is repeatedly held at both ends of the sliding position for each pressing operation.