JPS60174117A - 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 Field of the Invention The present invention relates to an appliance for heating water to boil water, and more particularly to a water heater that cuts off the power supply to the heating device after the water has been reliably boiled. be.

Structure of conventional example and its problems In general, it is preferable that the hot water used for brewing tea, coffee, or black tea be boiled. There was a method of detecting the water temperature in a water heater configuration in which the power supply to the heating element was cut off after the water temperature had risen to 100 d11. Therefore, boiling control was practically difficult. A method of detecting the steam that is rapidly generated during boiling has also been considered, but in this case, in order to prevent malfunctions due to the steam that is generated before boiling, a steam passage is led out from the container containing the water to the outside of the main body. A vapor detection element was provided near the outlet opening.

This method had the drawbacks that the vessel was large and that it was expensive due to the complicated steam passages.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, has an extremely simple configuration, and cuts off the power supply to the heating device after reliably boiling water.
The object of the present invention is to provide a water heater that can be easily mass-produced and can be easily re-boiled when necessary.

Structure of the Invention In order to achieve the above objects, the present invention provides a container containing a liquid, a heating device provided at the bottom of the container, and a mounting tube provided at the upper portion of the container and equipped with a vapor detection element. a lid body that covers the top surface of the container and has a steam discharge port; a shielding plate that has a ventilation hole that communicates the mounting tube with the inside of the container via the discharge port; and a container outer cylinder that covers the container. and a mounting cylinder equipped with the vapor detection element protrudes from the outer shell of the container so that the vapor detection element is located outside the outer shell of the container.With this structure, water in the container is The steam detection element can be kept at a low temperature until it boils, and the steam that is rapidly generated by boiling can be allowed to flow into the mounting cylinder, and the steam detection element can be activated by this boiling steam. In this case, the vapor detection element can also be kept below the OFF operating temperature and then boiled again.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 1 to 4, 1 is a cylindrical container outer body;
A spout 2 is fixed to the upper end opening, and a bottom plate 3 is integrally attached to the lower end. 4 is a handle rotatably attached to the spout 2. Reference numeral 6 denotes a top lid that is attached to the Note 02 so as to be able to be opened and closed.
It is fastened so that it can be opened and closed by lock knobs 6 provided on both sides of b. A cylindrical portion 5C with an open top is provided in the center of the upper lid 6, and a push plate 7 that is vertically slidable is provided within the cylindrical portion 6c. A lock ring 8 restricts the vertical sliding of the push plate 7, and is engaged with a switching lever 9 so that the vertical movement of the push plate 7 can be selected. 1
o is a bellows pump provided at the lower part of the push plate 7, and is sealed by attaching the upper surface to the upper plate 11 and the lower surface to the lid cover 14 by ultrasonic welding or the like. Further, a vent hole 11a is provided at the center of the upper plate 11, and the lower end of a push rib 12a provided at the center of the steam cover 12 is integrally engaged with the push plate 7 when the push plate 7 moves downward. A movable valve 13 is provided which can close the vent 11a and open the vent 111L when the push plate 7 moves upward. A coil spring 18 for returning the bellows pump 1o is interposed between this =J valve 13 and a lid cover 14 to which the lower surface of the bellows pump 10 is welded. Reference numeral 14a denotes a spout nozzle provided approximately at the center of the lid cover 14, and this spout nozzle 14a communicates with a through hole 16a of a lid body 16 made of extra fat through a lid gasket 15. 17
is a communication backing that allows airtight communication between the vent hole 111L provided in the upper plate 11 and the steam cover 12, and the steam cover 12 and the steam hole 6d provided in the upper lid 5 are communicated with each other.

Reference numeral 19 denotes a bottomed container made of stainless steel that is installed inside the container outer shell 1. The container 19 has a flange portion 19a at its upper end and is supported by the mouth 2 via a container banking 2o. The lid body 16 placed on the top surface of the container 19 has a through hole i6a in the center for discharging steam, and an overflow prevention valve 2.
The valve chamber 22 has a valve chamber 22 containing a valve 1. Also, this lid body 16
A shielding plate 23 made of a stainless steel plate or the like is fixed to the lower surface of the housing with screws or the like.

A waterproof backing 24 holds the container 19 and the lid 16 airtight. A rising pipe 26 extends from the valve chamber 22 to the bottom of the container 19, and its upper end extends outward from the container 19 and has a spout 26a with its tip opening downward. It is connected in the valve chamber 22 via the pouring pipe 26 and the valve cover 27. 28 is a ventilation hole having an L-shaped passage provided at the bottom of the shielding plate 23, and 23b is a heat exhaust hole having a smaller diameter than this ventilation hole 28.

Reference numeral 29 denotes a mounting tube made of heat-resistant and steam-resistant polysulfone resin, etc., which is provided at the upper part of the container 19 and has a vapor detection element attached to its end. protruding from the outside.

Also, this mounting tube 29 has an O-ring 30. It is watertightly installed in the container 19 by means of a mounting spring 31 and a fixing plate 32, and communicates with the inside of the container 19 through a 9L-shaped ventilation hole by a discharge port 23& provided in a shielding plate 23. . 33 is a manual return type thermoswitch which is a vapor detection element provided at the tip of the mounting tube 29 via a thermobacking 34;
This thermosui nona 331'i mounting plate 35 provides a heat-sensitive surface exposed inside the mounting tube 29.

Reference numeral 37 denotes a display plate fixed to the outer body 1 of the container, and has a raised part 37a in the center, and inside this raised part 37a is provided a water conduit pipe 38 that guides the hot water coming out of the spout 26iL to the outside of the container. At the same time, a thermoswitch 33 is housed at the rear of the water conduit 38, which is attached to the tip of an attachment tube 29 that protrudes to the outside of the container outer shell 1. Reference numeral 39 denotes an operating lever for setting the thermo switch 33 to ON, and this operating lever 39 is connected to the water conduit 3 inside the raised portion 37a of the display board 37.
It is locked in front of 8.

Further, the water guide pipe 38 is provided at an angle of approximately 12 degrees from the vertical direction, and the tip of the water injection pipe 26 shouldering the spout 26a is provided substantially vertically, and the water guide pipe 38
It intersects with the inner wall on the main body side on an extension line. 40 is a water level gauge window, 41 is a band-shaped heating device provided on the outer circumferential surface of the bottom of the container 19, and is integrated with a heater 41a for boiling water and a heater 41b for keeping warm. Near the top of this heating device 41 is a hot water heater 4 connected in parallel with a water heater switch 33.
2, and a safety thermostat 43 in series with this. 44a is a thermal reed switch that controls the heat-retaining heater 41b, and 44b is a temperature fuse, which is held pressed against the bottom surface of the container 19 by a pressing spring 46. 46 is an electrical connector, and 47 is a back plate.

In the electric circuit, as shown in FIG. 4, the water boiling thermo 42 and the thermo switch 33 form a parallel circuit, and the water boiling heater 411L and the safety thermo 43 are connected in series.

Next, the operation of the above configuration will be explained with reference to FIG. 6, which shows temperature changes in each part. First, water is poured into the container 1S so that it does not reach the mounting tube 29, and when the thermoswitch 33 is turned on, power is supplied to the heating device 41. Then, the water in the container 19 is heated, and the water temperature rises as shown by the solid line in FIG. At the same time, the temperature in the container space A formed by the water surface and the shielding plate 23 increases later than the water temperature, as shown by the dashed line in FIG. Since the thermoswitch 33 is provided to protrude outside the container shell 1, it is less affected by heat from the inside of the container 19 or the heating device 41, and its temperature rise is as shown by the broken line in FIG. .

When the water temperature in the container 19 reaches a temperature of about 96'C (at the point of time), a rather large amount of steam begins to come out, and the temperature in the container space A becomes close to the water temperature. However, the temperature of the heat-sensitive surface of the thermoswitch 33 protruding from the outside of the container shell 1 is
Almost no steam enters the inside of the mounting tube 29 from the ventilation hole 28 through the discharge port 231L, so the temperature rises relatively slowly.

Next, when the water temperature reaches the boiling point (at time t2), a large amount of steam is suddenly generated and fills the container space A, and the steam enters the inside of the container 29, rapidly turning the thermoswitch 33 on (at about tz time). 50° C. to about 96° C. at time t3) to operate the oFF. The operating temperature T3 of this thermoswitch 33 is 8
It is set to turn off at 0 to 96, and it works reliably because the steam quickly raises the temperature after the water boils.

Furthermore, since the thermoswitch 33 is provided so as to protrude from the outer surface of the container shell 1, it is hardly affected by the radiant heat generated from the surface of the heating device 41 that heats the water in the container 19 until it boils. It operates only by steam inside the mounting tube 29.

Next, the heating device 41 is turned off by turning off the thermoswitch.
After the power supply to the hot water heater 4'11L is cut off, the water temperature is maintained at about 96° C. by the thermal reed switch 44a. Therefore, a large amount of steam is not generated, and therefore the temperature inside the mounting tube 29 falls below the water temperature, and the ambient temperature of the thermoswitch 33 is also controlled by the heating device 4 by the container outer shell 1.
1 and container 19 because it shields the radiant heat generated from the outside surface. I\I r l1rIIA 1-J-1 song-
--Huh ≦The degree of low voice actually falls to about 76'c. At this time, when the ON operation is performed again, the hot water is heated and boiled, and a large amount of steam is generated again, causing the temperature of the thermoswitch 33 to rapidly rise in the same manner as described above, and the thermoswitch 33 is turned OFF. At the time of boiling, steam coming out of the through hole 1saj of the lid body 16 passes through the bellows 1o and the vent 11a, and is discharged to the outside of the vessel from the steam hole 6d.

In addition, the thermo switch 33 is connected in parallel to the water boiling thermo 42 and the water boiling heater 41&, so if the thermo switch 33 is turned on without being set to ON, the water boiling thermo 42 detects water wetness and the water temperature reaches around 96'C. When the water temperature reaches a certain temperature, the power to the water heater 41a is cut off and the water is boiled.

Thus, according to the embodiment of the present invention, the thermoswitch 3
3 is provided to protrude from outside the container IIl;
It is almost unaffected by the heat retention heater 41b during heat retention, and its temperature drops below the OB'F operating temperature.
You can turn it on again at any time and get boiling water.

Further, a mounting cylinder 29 is provided at the upper part of the container 19, the tip of which protrudes from the container outer shell 1, and a thermoswitch 33 as a vapor detection element is provided, and the mounting cylinder 29 and the container 19
A ventilation hole 28 communicating with the inside of the container 19 is connected to a shielding plate 23 at the top of the container
Since the temperature of the thermoswitch 33 is gradually increased until the water in the container 19 boils, a large amount of steam flows into the mounting tube 29 when the water boils. It is possible to raise the temperature to 96 in a few seconds,
Therefore, the OFF operating temperature of the thermo switch 33 is 7
It is sufficient to set the temperature within the range of 0'C to 96'C, which allows a large temperature tolerance during mass production, and as a result, it can be obtained at low cost.

In addition, the vapor detection element is manually reset type Thermosui Note 33.
Therefore, the configuration is simple and can be obtained at low cost. Furthermore, by locating the thermoswitch 33, which is a vapor detection element, in the raised part 371L of the display board 37 located on the front side of the container outer shell 1, which accommodates the water conduit 38, a cohesive design can be obtained. I can do that. Similarly, there is no need to attach a component having an extra raised portion for the purpose of accommodating the vapor detection element, making it simple and inexpensive.

Further, as shown in the above embodiment, the distal end portion of the spout pipe 26 having the spout 26a intersects the inner wall of the main body side of the water conduit 38 on an extension line, and the hot water discharged from the spout 26 & is in contact with the inner wall of the water conduit 38 on the main body side, and can keep the hot water outflow position constant, and as a result, can prevent the hot water from splashing out.

Incidentally, the same effect as described above can be obtained even if the vapor detection element is installed within a raised part provided integrally with the spout. Further, in the above embodiment, a thermoswitch was used as the vapor detection element, but the same effect as described above can be obtained by using a temperature-dependent resistance change element such as a thermistor or a shape memory alloy. Furthermore, if the opening of the ventilation hole 28 of the shielding plate 23 is provided opposite to the mounting tube 29, when water boils and a large amount of steam is generated, 1.
Needless to say, since the steam is vigorously injected into the thermoswitch 33, the operation is more reliable.

As described above, according to the present invention, a container containing a liquid;
a heating device provided at the bottom of the container; a mounting tube provided at the upper portion of the container and provided with a vapor detection element; a lid covering the upper surface of the container and having a vapor discharge port;
It has a shielding plate having a ventilation hole that communicates the mounting tube with the inside of the container through the discharge port, and a container outer shell that covers the container, and a container equipped with the vapor detection element is placed outside the container. Because it is located in the row of the outer body of the container with one part protruding from the cage,
It is possible to reliably cut off the power supply to the heating device after the water in the container boils and a large amount of steam is generated, and the steam detection element is not affected by radiant heat generated from the container or heating device when keeping warm. Therefore, re-boiling is possible, etc.
With an extremely simple configuration, it is possible to provide a water heater that is inexpensive and highly mass-producible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a water heater showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the water heater, and Fig. 3 is a temperature one-hour characteristic diagram of each part of the water heater. . 1...Container outer body, 2...Spout, 16...
... Lid body, 19 ... Container, 23 ...
Shielding plate, 23...Discharge port, 28...Vent hole, 2e...Mounting tube, 33...11. . Thermo switch, 37...-Display board, 37 &...
...Elevated part, 38...Water pipe, 41...
・Heating device. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (3)

[Claims] (1) A container that contains a liquid, a heating device provided at the bottom of the container, a mounting tube provided above the container and equipped with a vapor detection element, and a mounting tube that covers the top surface of the container and that detects vapor. a lid body having a discharge port, and via the discharge port,
The method includes a shielding plate having a ventilation hole that communicates the mounting tube with the inside of the container, and a container outer shell that covers the container, and the mounting tube provided with the vapor detection element is made to protrude from the container outer shell to detect the vapor detection element. A water heater located outside the container. (2) The water heater according to claim 1, wherein the vapor detection element is installed in a raised part of a display board located on the front side of the outer body of the container that accommodates the water pipe. (3) The water heater according to claim 1 JJ, wherein the vapor detection element is installed in a raised part that is integrally provided with a spout placed on the upper part of the outer body of the container.