JPS6317395Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric water heater having a timer for controlling the supply of electricity to a heating element.

Conventional configuration and its problems A conventional electric water heater had the configuration shown in FIG. In this Figure 1, 1 is a container;
2 is a heating element provided at the bottom of the container 1; 3 is a first automatic temperature controller thermally attached to the container 1 to control the main heating element 2a of the heating element 2; 4 is a heating element of the heating element 2; Container 1 to control the auxiliary heating element 2b
a second automatic temperature controller thermally mounted on the
6 is a lid body equipped with a pump (not shown) that pumps air into the container 1 in order to discharge the heated liquid in the container 1 at an appropriate temperature to the outside;
The inner lid 8 has a suction pipe 7 that closes the upper end opening and communicates the inside of the container 1 with the outside of the main body.
The current supply socket and 9 are appliance connectors.

The electric circuit of this conventional electric water heater is as shown in FIG.
connected in parallel to the series circuit with the automatic temperature controller 4,
This parallel circuit is connected to a power supply.

The operation of the electric water heater configured as above will be explained below.

When a liquid to be heated such as water is injected into the container 1 and the appliance connector 9 is connected to the energizing socket 8 to start energizing, the liquid to be heated is heated by the heating element 2.
Temperature rises. Next, when the heated liquid reaches the appropriate temperature,
The first and second automatic temperature regulators 3 and 4 operate to turn off the electricity. Normally, the operating temperature differential of the second automatic temperature controller 4 is about 3 degrees.
It is considerably smaller than that of the first automatic temperature controller 3, and after the first automatic temperature controller 3 is once turned off, the second automatic temperature controller 4 controls the energization of the auxiliary heating element 2b of the heating element 2, The temperature of the liquid to be heated is maintained at a predetermined temperature.

When discharging the liquid to be heated, air is pumped into the container 1 by a pump housed inside the lid 5, and the liquid to be heated passes through the suction pipe 7 of the inner lid 6 under the pressure to the outside. It is discharged.

However, in the above-mentioned conventional electric water heater, the heating element 2 is heated even when the liquid to be heated is not required.
The liquid to be heated is maintained at a high temperature by energizing it.
It has the disadvantage of wasting electricity. Generally, the appropriate amount of hot water for brewing coffee or tea is approximately
It is said that the water is water that has just been boiled to over 90 degrees Celsius, but with conventional electric water heaters, the heated liquid is kept in a high temperature state for a long time, so changes in water quality can be seen, resulting in delicious coffee or tea. There was a drawback that I couldn't get it.

Purpose of the invention In view of the above-mentioned drawbacks, the present invention automatically starts energization when necessary without consuming unnecessary power, and provides energy-saving performance and delicious coffee by supplying freshly boiled liquid to be heated. The present invention also provides an electric water heater that is easy to use and has excellent durability.

Structure of the Invention The electric water heater of the present invention includes a cylindrical container with a bottom, a heating element that is provided near the bottom of the container and heats the liquid contained in the container, and a body that covers the outer periphery of the container. A pump that discharges the liquid in the container to the outside, a discharge pipe that guides the liquid in the container to the outside, and a body that is located below the container except for the operating section, and starts energizing the heating element. The configuration includes a timer that controls time and a heat shield plate fixed to the top of a heat shield frame that is located between the timer and the heating element and fixes the control part of the timer, thereby eliminating wasteful power consumption. This eliminates the need for coffee and makes it possible to enjoy delicious coffee.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In Figures 3 to 5, 11 is a container, 12
A heating element is provided at the lower part of the container 11, and consists of a main heating element 12a with high power consumption and an auxiliary heating element 12b with low power consumption. 13 is a first heat-sensitive element attached to the container 11 to control the main heating element 12a.
An automatic temperature controller, 14, is a second heat-sensitive temperature controller attached to the container 11 to control the auxiliary heating element 12b.
15 is an automatic temperature controller; 15 is a lid housing a pump (not shown) for pumping air into the container 11 in order to discharge the heated liquid in the container 11 to the outside; 16 is the container 11; an inner lid 19 that airtightly closes the upper end opening and has a suction pipe 17 and a discharge port 18 that communicate between the inside of the container 11 and the outside of the main body;
is a body that covers the container 11, a display board 20 having a water level display section 20a and an energization display section 20b is attached to the front side of the body, and the container 11 and the inner lid 16 are attached to the upper end.
A spout 2 into which a lid body 15 is installed on the upper end of the spout 2
1 is listed. 22 is a discharge pipe whose one opening is located below the end of the discharge port 18, and whose other opening is opened to the outside of the main body through a protrusion 20c formed approximately at the center of the display board 20; 23 is the container; Mounting bracket fixed to the bottom of 11, 24
A is an electronic circuit control part of the timer 24, and an IC 24j that can control its own counting speed by the resistance value of the volume 24b and fixed resistor 24h and the capacitance value of the electrolytic capacitor 24i.
The relay 24k is operated to perform time control.

The control unit 24a is located below the container 11 having the heating element 12 at the bottom and is fixed to a heat shielding frame 25, and is formed by a metal heat shielding plate 26 fixed to the upper part of the heat shielding frame 25. The upper part is covered, and the heat shield plate 26 is attached to the mounting bracket 23 .

Note that the volume 24b is provided on the heat shielding frame 25, and the operation shaft 24 extends outward from the display frame 27 provided at the lower part of the display board 20 in front of the side surface of the body 19.
c protrudes, and an operating knob 28 is inserted and fixed at the tip. The operation knob 28 displays a number indicating the set time. In other words, the timer 24 includes a control section 24a and a volume 24b.
A lamp 29 indicates the operating state of the timer 24 and is fixed to the back surface of the display frame 27.
30 is a hook on which the lower end of the body 19 is placed;
Reference numeral 31 denotes a current supply socket of the appliance connector 32.
Note that draining ribs 27a are integrally provided at the upper end and both side ends of the joint surface of the display frame 27 with the body 19.

The timer 24 has a movable contact 24d, a first fixed contact 24e, and a second fixed contact 24f, and when the timer 24 is on, the movable contact 2
4d and the first fixed contact 24e contact to form a timer circuit, and when the timer 24 is in the off state,
The movable contact 24d and the second fixed contact 24f contact each other to form a circuit with the heating element 12.

The operation of the electric water heater configured as described above will be explained.

First, a liquid to be heated, such as water, is placed in the container 11 . Next, consider the time required for heating the liquid to boil the water (e.g. room temperature 20℃, water temperature 20℃,
Water volume 2.2, water heating power 750w, water heating efficiency 90
%, approximately 17 minutes if the water boiling temperature is 90°C), then turn the volume 24b to match the time value on the operation knob 28 that displays the operating time of the timer 24, and then turn the volume 24b to match the time value (approximately 17 minutes if the water boiling temperature is 90°C). Socket 3
1, the movable contact 24d of the relay 24k
contacts the first fixed contact 24e to form a timer circuit. At this time, the lamp 29 indicating the on state of the timer 24 lights up, and the user
4 is in operation. After a predetermined period of time has elapsed, the movable contact 24d switches to the second fixed contact 24.
f, automatically energizes the heating element 12, heats the liquid to be heated in the container 11, and brings it to a predetermined temperature using an automatic temperature controller. After that, air is pumped into the container 11 by the pump as in the conventional case, and the heated object in the container 11 is pumped to the outside through the suction pipe 17, the discharge port 18, and the discharge pipe 22. Discharged and used.

As described above, according to this embodiment, the timer 2
4 forms a timer circuit when it is on, and forms a circuit with the heating element 12 when it is off, thereby energizing the heating element 12 during times when the liquid to be heated is not required. Energy saving can be improved by reducing power consumption as much as possible, and the heating element 12 is automatically energized after the predetermined time set by the timer 24 has elapsed, so that the heating element 12 can be heated at the desired time. Freshly boiled water can be obtained, which is good for brewing coffee and tea.

Also, the volume 2 which is the operation part of the timer 24
4b, the ribs 27a of the display frame 27 prevent water from penetrating and have good electrical insulation.

Furthermore, since the operation knob 28 of the timer 24 is provided on the front of the main body, it is easy to operate and has a good design. The control unit 24a of the timer 24 also has a heat shield plate 24 between it and the heating element 12.
Since the controller 24a is located at the lower part of the body 19, even when the temperature of each part is saturated, the temperature distribution is at the lowest point. the result,
Since performance deterioration due to heat can be prevented, reliability and durability can be improved.

In this embodiment, the timer 24 is a so-called timer IC that can control its own counting speed using constants of a resistor and an electrolytic capacitor.
Although the time control method has been described above, the same effect can be obtained by providing time control using a motor and a mechanical timer using movable contact operation in place of the volume 24b.

Effects of the Invention As is clear from the above explanation, the electric water heater of the present invention includes a heating element that is provided near the bottom of the container and heats the liquid contained in the container, and a heating element that is located below the container and is operated. a timer that controls the start time of energization of the heat generating element, and a heat shield frame that is located between the timer and the heat generating element and fixes the control part of the timer; Since it is equipped with a fixed heat shield,
The timer control section can block radiant heat from the heating element with a heat shield, and even when the temperature of each part is saturated, the timer control section is housed in the lowest part of the temperature distribution, that is, at the bottom of the body. Therefore, performance deterioration due to heat can be prevented, and as a result, reliability and durability can be improved.Furthermore, by using the above-mentioned timer, power consumption can be reduced, and delicious It can supply freshly boiled water suitable for brewing coffee and tea.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional electric water heater;
3 is an overall perspective view of the electric water heater according to an embodiment of the present invention, FIG. 4 is a sectional view of the same, FIG. 5 is a perspective view of the main parts, and FIG. 6 is an electric circuit diagram of the same. It is. 11... Container, 12... Heating element, 19... Body, 22... Discharge pipe, 24... Timer.

Claims (1)

[Scope of utility model registration request] A cylindrical container with a bottom, a heating element provided near the bottom of the container to heat the liquid contained in the container, a body that covers the outer periphery of the container, and a body that discharges the liquid in the container to the outside. a pump, a discharge pipe that guides the liquid in the container to the outside, a timer that is located below the container and accommodates everything other than the operating section in the lower part of the body, and that controls the start time of energization of the heating element; An electric water heater comprising a timer and a heat shield plate fixed to an upper part of a heat shield frame located between the heating element and fixing a control part of the timer.