JPS60179022A - Hot water feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a water heater such as a coffee boiler used in general households.

Conventional configuration and its problems Conventional water heaters of this type boil water in a water tank, sense the rise in water temperature, open a heating circuit, and pour water by manually operating a lever. However, if the water was not poured immediately after it was boiled, the water temperature would drop, and when extracting coffee, etc., the coffee components would not be sufficiently extracted, resulting in a low-temperature, unpalatable product. The switch and hot water supply lever still had to be operated, making it difficult to operate.

In order to improve this problem, in the past, as shown in Fig. 1, a water tank 1 was equipped with a heating device 2, and a valve 4 was installed at a hot water supply port 3 provided at the bottom of the water tank 1. There is one in which the valve 4 is an elastic temperature sensing plate shaped like an inverted spring.

In the water heater with this configuration, water put into a water container 1 is heated by a heating device 2, and when the water temperature reaches a certain temperature or higher, a reversible spring-shaped valve 4 is reversed and hot water is automatically dripped from a hot water supply port 3. However, in this configuration, since the temperature sensing member is located inside the water tank 1, there is a problem that it easily deteriorates and its characteristics change, and furthermore, the electric circuit of the heating device and the opening and closing of the valve are separate. Since the heating device 2 is formed as a body, there is a danger that the heating device 2 will dry-fire or that the heating device 2 will be cut off while the water temperature is low and the valve 4 will not open. Once again, the spring-shaped valve 4 operates and hot water drips! ~When you start,
It is not possible to stop the process halfway through, so if you leave the cup under the hot water supply port 3, a large amount of boiling water will wet the table.
There were problems such as the risk of burns.

Purpose of the Invention In view of the above-mentioned conventional problems, an object of the present invention is to provide a water heater that can automatically supply hot water at a constant high temperature, operates reliably, is highly safe, and has excellent operability. That is.

Structure of the Invention In order to achieve the above object, the water heater of the present invention has a water tank having a heating device and a hot water supply path at the bottom, a water shutoff valve for opening and closing the hot water supply path, and a water valve for opening and closing the hot water supply path. A valve lever to be operated, a locking piece that locks the valve lever to keep the hot water supply path closed, a switch button that operates in conjunction with a switch that opens and closes the heating circuit of the heating device, and a switch between the valve lever and the switch δ. A lever/spring provided in the water tank and always biased in the opening direction of the hot water supply path, a temperature sensor for sensing the temperature in the water tank, and a solenoid coil driven by the thermal response of the temperature sensor. and when the solenoid coil is energized, the locking piece is attracted to open the hot water supply path and a heating circuit is opened, and when the switch button is released, the valve lever is locked to keep the hot water supply path closed. According to this configuration, the heating circuit and hot water supply path are simultaneously opened by the operation of the temperature sensor, so hot water can always be automatically supplied at a high temperature, and as a result, delicious coffee, etc. can be brewed. The liquid is obtained, and reliable operation is obtained without the risk of boiling or dry firing or malfunction.Furthermore, with just a lever operation, the hot water supply path can be blocked and the heating device can be closed, and even during hot water supply, it can be operated at any time. Since hot water supply can be stopped and hot water can be re-supplied at any time, the operability is extremely high.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 2 to 6, 11 is a hot water supply unit supported by a support 13 above a base 12;
A water tank 14 for storing water is provided. A heating device 16 is provided at the bottom of the water tank 14, and a hot water supply path 16 is provided below the hot water supply unit 11 so that hot water drips.
6 is provided. A positive water valve 17 opens and closes the hot water supply path 16, and this water stop valve 17 always closes the hot water supply path 16 by a valve spring 18. 19 is a temperature sensor consisting of a thermostat etc. and detecting the temperature inside the water tank 14;
This temperature sensor 19 is provided approximately at the center of the bottom surface of the water tank 14.

Reference numeral 20 denotes a diaphragm made of silicone rubber provided at the lower part of the water stop valve 17, and this diaphragm 2Q is movable up and down while maintaining watertightness.

6.

Reference numeral 21 denotes a valve lever rotatably mounted on a shaft 21a. One end of this valve lever 21 pushes up the diaphragm 20 and further pushes up the water stop valve 17 to open the hot water supply path 16.
and the other end is the pillar 13.
It protrudes to the side and opens the normally closed contact piece 23 of the switch 22. Further, a locking protrusion 26 that is locked to a locking piece 25 of the solenoid coil 24 is integrally formed on the valve lever 21. A locking piece 251 of the solenoid coil 24 is rotatably provided, and this locking piece 26 is always urged in a direction away from the solenoid coil 24 by a locking piece spring 60, so that the solenoid coil 24 is energized. When the valve lever 21 is moved, the locking piece 26 is attracted and the locking protrusion 26 of the valve lever 21 is released. 2 is a switch button, and this switch button 27 is connected to a switch lever 28 that moves downward, and this switch lever 28.
It consists of a switch knob 29 rotatably provided. Further, this switch knob 29 is provided with a locking protrusion 31 that is locked with a switch locking piece 30 below the rotation center 32, and a convex portion 33 is integrally formed above the rotation center 32. . Further, the switch knob 29 is also integrally formed with a push portion 35 that closes the normally open contact piece 34 of the switch 22 by its downward movement.

Reference numeral 36 denotes a lever spring provided between the switch button 27 and the valve lever 21, and is configured to pull each other. 37 is a lower container that covers the lower part of the water tank 11, and 38 is a tank lid that is detachably attached to the upper opening of the water tank 11. Reference numeral 39 denotes a basket that is detachably attached to the lower surface of the lower container 37 and stores therein coffee powder or other materials to be extracted. 40 is a glass container for storing boiling water for extract liquid, 41 is a pusher, and 42 is a glass container lid. Reference numeral 43 denotes a heat retention unit provided on the base 12 and on which the glass container 40 is placed;
4 and a heat retention thermostat 46. 46 is a magnetic plug, and 47 is a plug receiver.

Here, the electric circuit will be explained based on FIG. 6. A temperature sensor 19 such as a thermostat provided in the water container 11
and the switch 22 are connected to the heating device 1 in series with the power supply.
6 in series, and the solenoid coil 24 is connected to both ends of the terminal of the temperature sensor 19. Said switch 2
2 consists of a normally closed contact piece 23, a normally open contact piece 34, and a fixed contact piece 48.

Further, the heat retaining heater 44 is connected in parallel with the water heating circuit, and is also connected to the fixed contact piece 48 of the switch 22. The heat-retaining thermostat 45 is still connected in series to the heat-retaining heater 44. The energizing lamp 49 is connected in parallel to the heating circuit similarly to the heat-retaining circuit.

To explain the operation in the above configuration, first, the water tank 14
Remove the tank lid 38 and add the desired amount of water. In this case, water does not flow out because the water stop valve 17 is closed by the biasing force of the valve spring 18. Next basket 39
Put the desired amount of coffee powder etc. into the lower container 37,
And the glass container 4Q is placed on the heat retention unit 43. Then, when the magnetic plug 46 is inserted into the plug receiver 47 and the switch knob 29 is pushed down from the state shown in FIG. The heating device 16 and the heat-retaining heater 44 are energized.

At this time, as shown in FIG. 5, since the switch locking piece 30 is locked and held by the locking protrusion 31, the normally open contact piece 34 is kept closed. As a result, the insulating heater 44 preheats the glass container 40, and the heating device 15 heats the water in the water tank 14. When the temperature of the water rises and reaches boiling or near boiling, the temperature sensor 19 is activated. Then, it becomes OFF state. As a result, the solenoid coil 24 connected in parallel to the temperature sensor 19 is energized, and the locking piece 26 is attracted. At this time, since the switch button 2 is held down, the lever spring 36 is in a tensioned state and is about to pull down the valve lever 21. Therefore, due to the attraction of the locking piece 25, the locking piece 25 When the valve lever 21 is released from the locking protrusion 26, the other end of the valve lever 21 descends, pushing down the normally closed contact piece 23 and cutting off contact with the fixed contact piece 48.

As a result, the heating device 15 is cut off, and the power to the solenoid coil 24 is also cut off, so the heating circuit is turned off.
Totoru. Furthermore, one end of the valve lever 21 is connected to a diaphragm 2o.
is pushed up, and the water stop valve 1a is pushed up against the biasing force of the valve spring 18 to open the hot water supply path 16. This causes the hot water to flow out. In other words, since hot water supply starts and the heating circuit is turned off at the same time, hot water can be automatically supplied at high temperatures at all times.As a result, it is possible to reliably prevent the heater from drying out, and also to prevent malfunctions. Furthermore, since the solenoid coil 24 is energized only at the moment when the locking piece 25 is attracted, the temperature rise of the coil is extremely small, and therefore, its durability and safety are excellent. .

The hot water dripped from the hot water supply path 16 sprinkles on the coffee powder in the basket 39, extracts coffee components, and stores them in the glass container 4o. This coffee liquid is kept at an ill temperature by a heat retention heater 44 and a heat retention thermostat 45. At this time, since the glass container 40 is preheated by the heat-retaining heater 44, the temperature of the coffee liquid does not drop even during extraction, and delicious coffee liquid can be obtained.

When coffee extraction is finished and the power is turned off, the switch knob 29 is moved upward, and the switch knob 29 rotates clockwise about the rotation center 32.

As a result, the convex portion 33 located above the rotation center 32 disengages the switch locking piece 3o from the locking protrusion 31, so that the switch lever 28 returns upward. At this time, since the valve lever 21 is lifted upward together with the lever spring 36, the locking protrusion 26 of the valve lever 21 is engaged with the engagement piece 26 and held. At the same time, one end of the valve lever 21 is lowered, so that the diaphragm 2o returns to its original state, and the water stop valve 17 closes the hot water supply path 16. Furthermore, switch knob 2
As soon as the pushing part 35 of 9 separates from the normally open contact piece 34, the main power supply is cut off and the heat insulating heater 44 is also turned off.

Furthermore, even during hot water supply when the temperature sensor 19 is activated and the hot water supply path 16 is open, if the switch button 27 is returned to the OFF side, the valve lever 21 returns and the water stop valve 17 is opened to the hot water supply path 16.
6 and stop hot water supply. Furthermore, since the main power source of the switch 22 is cut off, the power source of the heating device 16 is also turned off, and as a result, even if the temperature sensor 19 is turned off, the solenoid coil 24 is not energized, so the valve lever 21 is not engaged. The stopper 26 holds and holds the hot water, and the hot water supply is stopped. In this way, the hot water supply can be stopped at any time, which reduces the chance of getting the table wet or causing burns.Furthermore, since all you have to do is operate the lever, it has excellent operability.

In the above embodiment, the switch button 27 has been described as having a vertical sliding type, but it may also be a rotating type, and when returning, the valve lever 21 is returned via a lever spring 36. A protrusion may be provided to ensure the return, and modifications may be made as appropriate without departing from the scope of the invention.

Effects of the Invention As is clear from the above embodiments, the hot water supply apparatus of the present invention includes a water tank having a heating device and a hot water supply path 13 at the bottom, a water stop valve for opening and closing the hot water supply path.
A valve lever that operates the water stop valve, a locking piece that locks the valve lever to keep the hot water supply path closed, a switch button that operates in conjunction with a switch that opens and closes the heating circuit of the heating device, and A lever spring provided between the lever and the switch button and always biased in the direction of opening the hot water supply path, a temperature sensor that detects the temperature in the water tank, and a temperature sensor that is driven by the thermal response of the temperature sensor. When the solenoid coil is energized, it attracts the locking piece to open the hot water supply path and also opens a heating circuit, and when the switch button is released, the valve lever is locked to supply hot water. The structure keeps the passage closed, so hot water can always be reliably and automatically supplied.As a result, delicious coffee and other extracts can be obtained, and there is no risk of the heater drying out. Reliable operation is achieved with no malfunctions or malfunctions, and with just one lever operation, you can block the hot water supply path, turn off the heating device, or turn off the hot water supply, and even during hot water supply, you can stop and reheat the hot water at any time. Therefore, its operability is very good.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of a conventional water heater, Fig. 2 is a vertical sectional view of a water heater showing an embodiment of the present invention, and Fig. 3 is an enlarged view of the main parts of the water heater. Cross section, 4th
The figure is a side sectional view showing the state before the switch lever is operated, and FIG. 6 is a side sectional view showing the state after the switch lever is operated.
FIG. 6 is an electrical circuit diagram of the same. 14...Water tank, 15...Heating device, 16...Hot water supply path, 17...Water stop valve,
19... Temperature sensor, 21... Valve lever, 22... Switch, 24... Solenoid coil, 26... Locking piece , 27...
...Switch button, 36...Lever fly. Name of agent: Patent attorney Toshio Nakao and one other person Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A water tank having a heating device and having a hot water supply path at the bottom, a water stop valve for opening and closing the hot water supply path, a valve lever for operating the water stop valve, and a valve lever that locks the valve lever to open the hot water supply path. A locking piece that holds the hot water supply path closed; a switch button that operates in conjunction with a switch that opens and closes the heating circuit of the heating device; and a switch button that is provided between the valve lever and the switch button and that is always biased in the opening direction of the hot water supply path. It has a lever spring, a temperature sensor that detects the temperature in the water tank, and a solenoid coil that is driven by the thermal response of the temperature sensor, and when the solenoid coil is energized, the locking piece is attracted. A hot water supply device which opens a hot water supply path and opens a heating circuit, and locks the valve lever by releasing a switch button to keep the hot water supply path closed.