JPS60210217A - Boiling type electric pot - 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 Technical Field The present invention relates to a boiling type electric pot, and more particularly to a boiling type electric pot that boils water and then maintains it at a predetermined temperature below the boiling point.

<Prior art> For example, as shown in Figure 4, conventional electric pots have a main heater (96) and a boiling thermostat (97) between both terminals of a commercial AC power source (80). )
, and a temperature fuse (95) are connected in series, and a series circuit of a heat retention heater (98) and a heat retention thermostat (99) is connected in parallel with a water boiling thermostat (97). Thermostat (97) until the internal water temperature reaches approximately 90-96℃
is turned on and the water temperature is rapidly raised by energizing only the main heater (96), and after reaching approximately 90 to 96°C, the water temperature drops mainly due to the heat generated by the insulating heater (98). We are trying to prevent this.

An electric kettle with such a configuration has the advantage of being able to maintain the water temperature at a predetermined temperature close to the boiling point after a predetermined period of time has passed, but the water never reaches the boiling point. Since the temperature does not rise and it does not boil, the chlorine odor etc. will not be completely removed, especially in the first stage of keeping warm, and -
If the water does not boil due to people's lifestyle habits, it tends to seem like the sterilization is not sufficient, which leaves a feeling of dissatisfaction.

Recently, in order to solve these problems, electric kettles have been developed that prevent the water from boiling by energizing the heater for a predetermined period of time after detecting a certain amount of smallpox near the boiling point, and ■ detecting the amount of steam generated. An electric kettle has been proposed that controls the power supply to the heater.

Among these, the above-mentioned problem does not occur with the electric water bottle 1 of type 6, as it is not affected by the amount of hot water inside the inner container and is always heated by a heater for a certain period of time. If the temperature is too small, there is a risk that the temperature of each component of the electric box 1 may rise abnormally.

On the other hand, the electric kettle of the method (■) stops the power supply to the heater by detecting the generation of steam exceeding a predetermined amount, so the inconvenience of the electric kettle of the method (■) can be solved. There is a problem in that a complicated electrical configuration has to be adopted in order to detect the generation of steam, stop energizing the heater, and maintain the energized state of the heater.

<Purpose> This invention was made in view of the above problems,
It is an object of the present invention to provide a boiling type electric kettle which has a function of keeping warm after boiling and can be simplified in configuration.

<Configuration> Highlights of this invention for achieving the above object 1111 U
The '1 electric pot has an inner container inside the outer case and a heater for heating the liquid at a predetermined position, and one contact of a normally open 0 relay is connected in series with the relay coil. The present invention is characterized in that a self-holding circuit is formed, a heater is connected in series with the relay contact, and a temperature-sensitive switch for self-holding cancellation is connected to the self-holding circuit, which detects a boiling state and is activated.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a longitudinal sectional view showing a boiling type electric kettle.

(1) is the outer case, (2) is the stainless steel inner container, (3) is the pouring pipe, (4) is the discharge pipe, (5) is the heater, and (6) is the discharge pipe. ) is the lid unit. And the outer case (1) is the inner container (2)
It has a support (11) for support, a socket (13), and a thermostat (15) for starting a water boiling operation that is thermally coupled to the inner container [21].

Further, (23) is a lid body, and the upper end flange (24) is supported by the upper end flange (22) of the inner container (2) with a backing (22a) having an appropriate shape such as a cross-sectional shape. There is. The upward flange (22) is supported by the inward flange (18) which is attached to the outer case (1), and the outer peripheral surface of the inner container (2) is covered with a heat insulating material (25). is surrounded by. The pouring pipe (3) consists of a pumping pipe (33) located inside the inner container (2) and a supply pipe (33) located at the top of the lid (23).
34), and a water stop ball (36
) and is communicated by a connecting pipe (35) having an air passageway (37) passing through it vertically. The discharge pipe (4) is connected to the supply pipe (
The projecting body (45) is connected to the auxiliary case (48) which is removably attached to the exterior case (1) so as to be movable in the axial direction of the auxiliary pipe (44). ) and move in the extraction direction■
It has a protrusion (46) that stops, and the discharge vibrator (4) can be removed by operating the knob (41) and forcibly pushing in the protrusion (45). still,(
49) is a waterproof board.

In addition, a first hot air vibe (38) communicating with the upper part of the air passage (37) is integrally formed to extend horizontally, and a small diameter A communicating hole (38a) is formed, and a communicating hole (38a) is formed.
A large diameter insertion hole (38b) is formed above the first steam pipe (38a), and a hole (38c) for inserting the temperature sensitive switch (8) is formed on the lower surface of the tip of the first steam pipe (38). A communication hole (38d) is formed in the upper surface.

The lid unit (6) has a presser lever (62) that is biased upward by a spring (61), and the presser lever (62)
A downward protrusion (62a) is formed at one end of the holder, and a downward protrusion (62b) is formed at the other end of the holder. A second steam pipe (63) is formed at °C. A backing (64) is attached to the lower end of the downward protrusion (62a) to close the communication hole (38a) from below through the insertion hole (38b) when the presser lever (62) is operated. , the backing (6) is attached to the bottom plate of the lid unit (6).
4) Attach the iIC large diameter annular backing (65) surrounding the iIC.

In addition, (66) is the L1 lever for the presser lever (62), and (67) is the first steam pipe (63) and the communication hole (
38d).

In addition, (the power is a pump unit installed below the 4-mostat (15) with a heat shield plate (71) interposed,
This pump unit (7) and the upper space of the inner container (2) are communicated through an air pipe (72), and a micro switch (13) for driving the pump unit (7) is installed at a predetermined position in the outer case (1). At the same time, a downward protrusion (6) is placed below the microswitch (73).
2b) is elastically deformed and the micro switch (73)
There are four waterproof backings (74) for driving the motor. Note that (15) is an externally operable automatic return type and normally open reboiling switch.

The temperature-sensitive switch (8) is provided in a casing (81) made of a material with high thermal conductivity, such as aluminum, which is formed to protrude upward at a predetermined position of the flange (18).
A receiving plate (82) installed slightly below the temperature-sensitive switch (81) prevents the temperature-sensitive switch (8) from falling. still,
(83) is a backing through which the casing (81) is inserted into the insertion hole (38c) and the flange (18) in a watertight manner.

Figure 2 is an electrical circuit diagram, in which a dry heating prevention switch (87) and a heater (5) are connected between both terminals of a commercial AC power supply (80).
, a thermostat (15) for starting the water boiling operation, and a fuse (88) are connected in series, a series circuit of a relay coil (84) and a temperature-sensitive switch (8) is connected in parallel with the heater (5), and a thermostat] In parallel with ~ (15), a normally open relay contact (85), a reboiling switch (75)
), and a heat insulation circuit (86) are connected. With the above Kaisei boiling type electric pot, if you fill the inner container (2) with a full pot of water and insert the magnet Zorag (14) into the socket (13), you can use the Riichi Mostat (15). is O
Since it is N, water in the inner container (2) is heated and heated by energizing the heater (5). Also, heater (5)
At the same time, the temperature-sensitive switch (8) turns ON'c,
Since the relay coil (84) is energized, the relay contact (85
) is turned ON, and thereafter the relay contact (85) is self-held.

Therefore, even after the water temperature rises to about 90° C. and the thermostat (15) is turned off, electricity continues to be applied to the Peter (5) to continue raising the temperature.

When the temperature is raised to the boiling point, a large amount of steam is generated,
Since the steam is released into the outside air through the air passage (37), the first steam pipe 38), and the second steam pipe (63), the released steam can notify people outside that the steam has boiled. The temperature of the temperature-sensitive switch (8) increases due to steam through the casing (81), and the inner container (2)
Detects that the water inside has boiled and turns on the moisture-sensitive switch (ξ3)
is turned OFF, and the self-holding of the relay contact (85) is released.

Therefore, after the thermosensor switch (8) detects the R state, only the heat insulating circuit (86) and the series circuit of the heater (5) are energized, and the heat generation capacity of the heater (5) is reduced. A slightly lower predetermined temperature (Thermostat (1
5) is maintained at a predetermined temperature at which it does not turn on.

In addition, as the steam generation stops and the temperature inside the first steam pipe (38) decreases, the temperature-sensitive switch (8) is turned on.
Even if this happens, since the relay contact (85) and the relay mostara h (15) are OFF, the boiling operation will not be performed again as it is.

After that, operate the lock lever (66) to release the locked state and press down the presser foot lever (62) to close the communication hole (38a) with the backing (64) and at the same time turn on the micro switch (13). As the force is activated, the internal pressure of the inner container (2) is increased through the air pipe (12), and the pouring pipe (3),
Connecting pipe (35), supply pipe (34), auxiliary pipe (44)
, and the hot water can be taken out through the discharge pipe (4).

In addition, if the boiling switch (15) is turned ON again in the heat retention state, the relay contact (85) is self-holding again and the water can be boiled again. That is, by operating the reboiling switch (15) connected in parallel with the relay contact (85), the relay contact (85) is immediately self-held;
Since the heater (5) can be energized, the circuit configuration and operation for boiling water again can be simplified.

Furthermore, if the heater (5) is energized with no water in the inner container (2), no steam is generated, but the dry cooking prevention switch (87) detects an abnormal temperature of 4. This means that the power to the heater (5) can be cut off.

FIG. 3 is an electrical circuit diagram showing another embodiment, and the difference from the embodiment in FIG. 2 is that the connection point between the relay coil (84) and the temperature-sensitive switch (8) and the fuse (88) The only difference is that a thermostat (15) and a reboiling switch (75) are connected in parallel between the two.

Therefore, until the relay contact (85) is self-retained, the relay mosta I-(15) and the temperature-sensitive switch (85)
), the heater (5) is energized, so the only difference from the above embodiment is that it is necessary to use a temperature-sensitive switch (8) with a large current capacity. The operation can be performed in the same manner as in the above embodiment.

It should be noted that the present invention is not limited to the above embodiments, and for example, a resistor may be connected in series with the relay coil (84), and the boiling point may be detected in parallel with the series circuit of the relay coil (84) J3 and the resistor. The temperature-sensitive switch (8
), and various design changes can be made without changing the gist of the invention.

<Effects> As described above, this invention has a self-holding circuit composed of a relay coil and a relay contact, and a temperature-sensitive switch that detects the boiling point and cancels the self-holding. Since it controls the power supply to the heater, it is possible to operate reliably with an electrical configuration that is simpler and cheaper overall than conventional electronic circuits. After boiling, it is kept at a predetermined temperature slightly lower than the boiling point, so it is possible to completely remove chlorine odor etc. even in the early stages of keeping warm, and you can feel safe knowing that the lagoon that has been boiled twice and sterilized is kept warm. Furthermore, since it detects the boiling state and stops energizing the heater, unnecessary temperature rises can be reliably prevented, and there is no generation of excess steam, so there is no risk of damage due to steam. It has the unique effect of eliminating

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a boiling type electric kettle;
FIG. 2 is an electrical circuit diagram showing an embodiment of the same, FIG. 3 is an electrical circuit diagram showing an embodiment of the same, and FIG. 4 is an electrical circuit diagram showing a conventional example. (1)...Outer case, (2)...Inner container, (5)
... Heater, (8) ... Temperature-sensitive switch, (84).
...Relay coil, (85)...Relay contact. Patent applicant Tiger N Hobin Co., Ltd.

Claims (1)

[Claims] 1. An electric kettle that has an inner container inside an outer case and a heater for heating liquid at a predetermined position, which is self-maintaining by connecting a normally open relay contact in series with a relay coil. The boiling type is characterized in that a heater is connected in series with the relay contact, and a temperature-sensitive switch for releasing self-holding that is activated upon detecting a boiling state is connected to the self-holding circuit. Electric pot. 2. The boiling type electric pot according to claim 1, wherein the electric pot has a steam pipe communicating between the inner container and the outside air, and a temperature-sensitive switch is installed facing the steam pipe. . 3. Connecting a manually operable reboiling switch in parallel with the relay contact I [boiling type electric boiler I~ according to claim 1 above].