JP3022149B2 - Electric water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pump-type electric water heater capable of heating and keeping a stored liquid and pouring the liquid into an external container.

[0002]

2. Description of the Related Art A conventional hot water supply device such as a pot or an electric water heater has a configuration as shown in FIG.

[0003] Reference numeral 101 denotes a container for storing a liquid.
In the lower part of 1, a lead-out path 102 for leading the liquid out of the body
One end is arranged. The pump 1
03 is provided, and a flow control valve 104 is further provided. The flow control valve 104 is closed by a first spring 105 which is constantly pressed in a closing direction. Reference numeral 106 denotes a knob for opening the flow control valve 104 against the pressing force of the first spring 105 and for opening and closing a switch 107 (not shown) for controlling the energization of the pump 103.

When the switch 106 is closed by depressing the knob 106 in the above-described configuration, the pump 103 operates to send out the liquid in the container 101 to the outlet path 102. Since the flow control valve 104 is simultaneously pushed down and opened by the knob 106, the liquid passes through the flow control valve 104 and is discharged outside the body.

[0005]

However, in the case of the above configuration, when adjusting the flow rate of the liquid, it is necessary to change the opening of the flow control valve 104 by changing the pushing distance of the knob 106. When the hot water is frequently used at the maximum tapping amount, the knob 106 is merely pushed down to the lowest point, so there is no problem in operability. It is very difficult to keep pushing in a certain position against the force,
Therefore, there is a problem that the flow rate is difficult to adjust because the flow rate is not constant. When the knob 106 is returned too much, the switch 107 is turned off, the pump 103 is stopped, and the tapping is stopped.

[0006] The present invention has been made in view of the above points, and has as its object to provide an electric water heater excellent in tapping operability.

[0007]

In order to solve the above-mentioned object, the present invention has a container for accommodating a liquid, and a lead-out path for leading the liquid in the container out of the body. An openable / closable flow control valve that moves in the closing direction at the time of tapping is provided, a knob that opens and opens the switch by pressing the flow control valve, and a switch that opens and closes a switch that controls power supply to the pump, and is slidably disposed within the knob. A mounting plate, a first spring that constantly urges the mounting plate upward, and a second spring whose biasing force is set to be weaker than that of the first spring, is disposed between the mounting plate and the knob;
The mounting plate is brought into contact with the main body to regulate the upper position, and a certain gap is provided between the mounting plate and the knob.

Second, the moving distance of the knob until the flow control valve starts operating is set to be larger than the switch operating distance and smaller than the gap between the mounting plate and the knob.

[0009]

According to the above arrangement, when the knob is depressed,
When the knob operates the switch, the pump operates and the liquid is sent into the outlet path.When the liquid reaches the flow control valve, the flow control valve is pushed up by water pressure and closed, but the upper part of the flow control valve is closed. Since the liquid is pushed by the knob, the liquid passes through the opening of the flow control valve and is discharged out of the body.

The push-up force of the knob is set so that the spring force is set to be weaker while the gap is provided between the knob and the mounting plate.
Only the urging force of the spring is applied to the knob, and when the gap is eliminated, the urging force of the first spring whose spring force is set strong is applied via the mounting plate, so that the pushing position of the knob is determined by the urging force of the second spring. No change is made while pressing between and the biasing force of the first spring. Therefore, if a small amount of tapping is set at this position, the small tapping position can be easily operated and a stable tapping amount without variation in flow rate can be obtained.

In addition, since the moving distance of the knob until the flow control valve starts operating, which is the second configuration, is set to be longer than the switch operating distance and smaller than the gap between the mounting plate and the knob, a small amount of movement is required. Since the switch operates reliably at the hot water discharge position, the pump does not stop, and the hot water discharge amount can be controlled to be constant. In this way, the operability when tapping a small amount of hot water is good, and the hot water can be reliably discharged.

[0012]

1 to 3 show an embodiment of the present invention.
It will be described based on. In FIG. 1, reference numeral 1 denotes a substantially cylindrical liquid storage container, and a heating element 2 is attached to a lower end of a cylindrical body. A pipe-shaped waterproof fitting 3 is provided on the bottom surface of the container 1 and is connected via a bushing 4 to an electric pump 5 which is a lead-out means. Reference numeral 6 denotes a lead-out path, which has a built-in openable and closable flow control valve 7 which works in a closing direction when tapping. Reference numeral 8 denotes a knob, which is provided to push down the flow control valve 7 from above and to open and close a switch 9 for controlling the energization of the pump 5 when it is pushed down.

A mounting plate 10 is slidably disposed inside the knob 8, and the mounting plate 10 is brought into contact with the main body by a first spring 11 which constantly urges the mounting plate 10 upward to regulate the upper position.
A second spring 12 having a smaller spring force than the first spring 11 is interposed between the mounting plate 10 and the knob 8 to provide a certain gap between the mounting plate 10 and the knob 8 when regulating the upper position. Provided.

The moving distance of the knob 8 before the outflow control valve 7 starts operating in the closed position is longer than the distance for operating the switch 9 by the knob 8 and smaller than the gap between the mounting plate 10 and the knob 8. You have set.

The operation of the above configuration will be described. Knob 8
Is depressed, the switch 9 closes and the pump 5 operates, and the hot water in the container 1 is sent to the flow control valve 7 through the outlet path 6. When the liquid reaches the flow control valve 7, the water pressure pushes up the flow control valve 7 to close it.
Since the upper portion of the flow control valve 7 is pushed by the knob 8, the flow control valve 7 is open, and the liquid passes through the opening of the flow control valve 7 and is discharged out of the body.

As long as there is a gap provided between the knob 8 and the mounting plate 10, only the urging force of the second spring 12 whose spring force is set weak is applied to the knob 8,
When the gap disappears, the urging force of the first spring 11 whose spring force is set strong is applied via the mounting plate 10, so that the knob 8
Does not change during the pressing between the urging force of the second spring 12 and the urging force of the first spring 11, and when the knob 8 is pressed with a stronger force than the urging force of the first spring 11, Goes down further.

The moving distance of the knob 8 until the flow control valve 7 starts to operate is set to be larger than the operating distance of the switch 9 and smaller than the gap between the mounting plate 10 and the knob 8, so that the gap is eliminated at a position where there is no gap. The switch 9 operates reliably, and the pump 5 operates.

[0018]

As described above, according to the present invention, if a small amount of hot water is set at a position where there is no gap, the knob can be set at a small amount of hot water by a simple operation. There is no change in the quantity of small amount of hot water.

In addition, in the small-volume tapping position, the switch is operated reliably to operate the pump, and the flow control valve is reliably pushed, so that small-volume tapping can be performed reliably and stably. It becomes.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electric water heater according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of the electric water heater.

FIG. 3 is an enlarged cross-sectional view of a main part of the electric water heater.

FIG. 4 is a longitudinal sectional view of a conventional electric water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 5 Pump 6 Outgoing path 7 Flow control valve 8 Knob 9 Switch 10 Mounting plate 11 First spring 12 Second spring

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shigezo Onishi 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-house (56) References JP-A-1-238810 (JP, A) JP-A-5-15449 (JP, A) JP-A-4-60152 (JP, U) (58) Fields investigated (Int. . ^7, DB name) A47J 27/21 101

Claims (2)

(57) [Claims] 1. A container for accommodating a liquid, and a lead-out path for leading the liquid in the container out of the body, a pump and an openable / closable flow control valve that moves in a closing direction when tapping water is provided in the lead-out path, A knob that presses and opens the flow control valve and opens and closes a switch that controls power supply to the pump;
A mounting plate slidably disposed in a knob, a first spring that constantly urges the mounting plate upward, and a second spring that is set to have a lower biasing force than the first spring, is provided between the mounting plate and the knob. An electric water heater having an arrangement, a mounting plate being in contact with a main body to regulate an upper position, and a fixed gap being provided between the mounting plate and a knob. 2. The electric water heater according to claim 1, wherein the moving distance of the knob until the flow control valve starts operating is set to be larger than the switch operating distance and smaller than the gap between the mounting plate and the knob.