JPH0731541A - Electric hot water reservoir - Google Patents

Abstract

PURPOSE:To provide an electric hot water reservoir of an inner container removable type which can prevent a thermal disc incorporating a reservoir body from being fused by local concentration of heat from a sheath heater formed in the thermal disc even though a large capacity heater gives a high boiling rate. CONSTITUTION:A thermal disc 8 has a size substantially equal to that of the bottom part of an inner container 31, a large capacity boiling sheath heater 8a is annularly formed at the outermost peripheral part of the thermal disc 8, and a temperature holding sheath heater 8b is annularly formed on the inside of the sheath heater 8a. Further, the temperature holding sheath heater 8b has both terminals 8b1 which are circumferentially separated to as to form an opened annular configuration, and the boiling sheath heater 8a has both terminals 8a1 which are inwardly superposed with each other between an annularly separated part between both terminals 8b1 of the temperature holding sheath heater 8b, and the outer periphery of the thermal disc 8, so as to an annular configuration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water storage container, and more particularly to an electric hot water storage container such as a domestic electric kettle for heating a content liquid to keep it hot or warm.

[0002]

2. Description of the Related Art If an inner container can be washed with an electric pot, it is convenient for cleaning and easy to keep clean. In order to achieve this, for the body that has a heating plate with a heater in the bottom,
It is conceivable that the inner container is housed so that it can be taken in and out, placed on the hot platen and heated, and the present applicant has previously proposed this.

[0003]

By the way, it is advantageous in terms of quality control, especially in terms of flooding resistance, to adopt a sheathed heater as the heater of the hot platen.

Therefore, the inventors of the present invention repeated experiments using a sheathed heater, and found that the removable inner container was placed on a heating plate and heated by an indirect heating system. There is a problem that the boiling rate is slower than in the case of the heating method in which the inner container is directly adhered.

If the capacity of the sheathed heater is increased to cope with this, a part of the aluminum heating plate may fail to melt, which is dangerous.

As a result of various studies on this, the bottom area of the inner container to be detached and attached is small, and the heating plate of a size commensurate with this is also small. Therefore, depending on the arrangement of the sheath heater,
It seems that the heat is weakly dispersed and the heat is concentrated locally.

These are common to all electric hot water storage containers, regardless of whether the inner container is attached or detached, as long as the liquid content in the inner container whose bottom is in contact with the hot plate is heated. is there.

In order to solve the above problems, the present invention has a novel arrangement corresponding to the bottom of the inner container of the sheathed heater, so that even if a sufficient boiling rate is obtained by a large capacity heater, the heat An object of the present invention is to provide an electric hot water storage container that can eliminate melting failure of the hot plate due to concentration.

[0009]

In order to achieve the above-mentioned object, the electric hot water storage container of the present invention, which is detachable from the inner container, has a hot plate having a sheathed heater in the bottom of the body. An electric hot water storage container capable of heating the content liquid in the inner container with which the bottom is in contact, the heating plate having a size almost equal to the bottom of the inner container, and a large-capacity seed heater for boiling water in the outermost peripheral part of the heating plate. In addition, a small-capacity sheathing heater for heat insulation is provided inside each of them, and the sheathing heater for retaining heat has an open annular shape in which both terminals are separated in the annular direction, and the sheathing heater for boiling water has both terminals. It is characterized in that the portion has a closed annular shape that is positioned so as to overlap in the inward and outward directions between the annularly separated portion between both terminals of the sheathed heater for heat retention and the outer periphery of the heating plate.

In particular, this construction is suitable when the inner container is housed so that it can be taken in and out of the container, and is mounted on the hot plate so as to be detachable.

Further, the sheathed heater for heat retention has an open annular shape in which both terminals are separated from each other in an annular direction, and the sheathed heater for boiling water has a volume terminal portion and the sheathed heater for retaining heat has an annular spacing between the volume terminals. It is desirable to form a closed annular shape that is positioned to overlap inward and outward between the portion and the outer circumference of the heating plate.

In this case, each of the seed heaters for boiling water and for keeping warm is embedded in a bead-shaped raised portion formed on the back surface of the heating plate, and the overlapping portions of both terminals of the sheath heater for boiling water are embedded in the same bead-shaped raised portion. It is preferable to have it.

[0013]

According to the above construction of the electric hot water storage container with removable inner container according to the present invention, the heater is divided into a large-capacity seed heater for boiling water and a small-capacity seed heater for heat insulation, and the heater is provided on the hot platen. By this, even if it is energized at full capacity, it can be distributed to each part of the hot platen, and especially a large capacity sheathed heater,
It is installed on the outermost peripheral part of the heating plate of approximately the same size as the bottom of the inner container to distribute heat in the annular direction using the large diameter part of the heating plate, so a large-capacity sheathed heater is used for a relatively small heating plate. It is possible to avoid the occurrence of melting failure in the hot platen even if the heating element is provided and water is heated at a sufficient speed.

Therefore, in the case of the electric hot water storage container in which the inner container is housed so that it can be taken in and out of the vessel and is mounted on the hot plate so that it can be detached, the heating of the content liquid is indirect, but the above hot plate is used. As a result, a sufficient heating state can be obtained.

Moreover, by arranging both terminals of the sheath heater for boiling water having a large capacity so as to be overlapped inside and outside, heat is dispersed in the circumferential length region longer than the length of one round of the large diameter portion of the hot platen, Moreover, since the overlapping portion of the both terminal portions faces the annularly separated portion between the both terminals of the heat insulating sheathed heater, heat concentration between the heat insulating sheathed heater and the sheathed heater is avoided, so that the heater capacity is improved. And the thermal safety of the hot platen can be increased.

Since each of the sheathed heaters for boiling water and for keeping warm is embedded in the bead-shaped raised portion on the back surface of the heating plate, the close contact with the bottom of the inner container of the heating plate is ensured, and the thick wall is not thick enough. It is possible to efficiently transfer the heat from the sheathed heater to the heating plate while preventing it from forming, and the overlapping portion of both terminals of the sheathed heater for boiling water is in the same bead-shaped ridge. By embedding, the bead-shaped raised portion forms a portion having a large heat capacity, so that the heat of the portion where the two terminal portions are adjacent and overlapped is sufficiently dispersed and transmitted to the main body of the heating plate. It is possible to prevent local concentration of heat due to overlapping.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric pot as a detachable inner container electric hot water storage container to which the present invention shown in FIGS.

As shown in FIG. 1, the electric pot of this embodiment has a double-walled container body 1 in which a metal container-type inner case 2 is housed in a metal cylindrical outer case 3. Configure and
The inner container 31 made of metal is fitted into the body 1 through the upper end opening 1a from above and is housed so that it can be taken in and out.

The inner case 2 is fitted with an upper end flange 2a by a shoulder member 4 made of synthetic resin fitted to the upper end of the outer case 3 from above, and is attached by a screw 345.

A bottom ring 7 made of synthetic resin is applied to the lower end of the outer case 3, and a bottom lid 10 made of synthetic resin is fitted into the opening of the bottom ring 7 to fit a plurality of claws. It is attached with one screw.

A rotary seat body 9 is rotatably fitted on the outer peripheral portion of the lower surface of the bottom lid 10 by a plurality of claws provided on the bottom cover 10. When the body body 1 is stationary, the rotary seat body 9 is mounted on the rotary seat body 9. 1
Can be rotated lightly.

On the inner bottom surface of the inner case 2, there is provided an aluminum heating plate 8 in which sheathed heaters 8a and 8b are embedded in a pattern shown in FIGS. 4 and 5 as shown in a sectional view of FIG. ing. The sheathed heaters 8a and 8b are a water heater and a heat retention heater. Details will be described later.

A heat shield plate 12 is fitted under the bottom of the inner case 2 and has an upper end bulge 2a at the lower end of the body of the inner case 2.
The heat shield plate 12 and the bottom ring 7 are connected to each other by a metal fitting 601. The inner case 2, the outer case 3, the shoulder member 4, the bottom ring 7, and the heat shield plate 12 are integrated to form the body 1 Is fixed to a solid one.

The hot platen 8 is received on the upper surface of the heat shield plate 12, and is attached at one place on the circumference with a screw 11, and
The protrusion 8c of the other heating plate 8 is attached to the mounting hole 1 of the heat shield plate 1
The hot platen 8 is fixed on the heat shield plate 12 by fitting the hot platen 2b.

A cylindrical portion 12a is provided at the center of the heat shield plate 12 and is located in a through hole provided at the center of the heating plate 8. The sensor case 15 is fitted and fixed to the cylindrical portion 12a, and the sensor holder 17 is housed in the sensor case 15 so as to be vertically movable.
The sensor holder 17 is always urged by the spring 16 acting between the sensor holder 17 and the bottom of the sensor case 15 so that the sensor holder 17 is always at the upper limit position restricted by the ceiling of the sensor case 15.

At this upper limit position, the upper end portion 17a of the sensor holder 17 holding the bottom sensor 18 is projected to the upper surface of the heating plate 8 by a predetermined amount. A reed switch 20 that magnetically reacts with a magnet 19 fixed to the sensor case 15 is held in the main body of the sensor holder 17.

The inner container 31 is housed so that it can be taken in and out of the body 1. In the housed state, an upward recess 31d formed at the bottom covers the hot platen 8 from above, and the recess 3 is formed.
The ceiling portion 31e of 1d is mounted so as to be in close contact with the upper surface of the heating plate 8, and the upper end portion 17a of the sensor holder 17 protruding above the heating plate 8 is attached to the upper surface of the heating plate 8 as shown in FIGS. Push down so that it is almost flush with.

A leg 31f having a double wall structure is formed around the recess 31d at the bottom of the inner container 31.
Since the leg portion 31f is seated when the table is directly placed, the ceiling portion 31e of the recessed portion 31d for closely contacting with the heating plate 8 is
There is an advantage that it is possible to avoid the situation where the inner container 31 is directly placed or when the inner container 31 is handled alone, it is prevented from touching or interfering with other things and receiving an external force, and the contact state is maintained for a long time.

When the upper end 17a of the sensor holder is projected on the heating plate 8, the reed switch 20 is moved to the magnet 19
Is not opposed to the magnet 19 and does not react with the magnet 19 and is brought into a normal state of either on or off.

However, when the inner container 31 is housed in the body 1 and placed on the hot platen 8 to push down the upper end 17a of the sensor holder, the reed switch 20 causes the magnet 1 to move.
9 and magnetically reacts thereto, the reed switch 20 returns from the normal state to the opposite operating state.

The attachment / detachment of the inner container 31 can be automatically discriminated by the change between the operating state of the reed switch 20 and the normal state.
When it is not present, the energization of the sheathed heaters 8a and 8b is automatically cut off. It can also be displayed and warned.

A thermal fuse 6 is provided on the outer peripheral portion of the heat shield plate 12.
The screws 72 are attached by screws 673 so that the power is cut off by melting at the final abnormal temperature which leads to an accident in the state of empty cooking.

Further, as shown in FIG. 1, a sensor mounting leg 674 projecting downward from a part of the heating plate 8 is integrally formed,
At the lower end of the sensor mounting leg 674, the sheath heater 8a,
8b and the mounting plate 676 holding the heater sensor 675 for detecting the temperature of the heat source formed by the heating plate 8 are mounted by screws 677 so that heat is conducted from the heating plate 8 to the heater sensor 675 via the sensor mounting leg 674 and the mounting bracket 676. I am doing it.

A circuit accommodating box 40 is integrally formed with the bottom ring 7 so as to open downward, and a circuit board 41 accommodated in the circuit accommodating box 40 is protected against water leakage from above. There is. Further, the circuit housing box 40 is covered with a bottom lid 44 from below, so that it is possible to cope with flooding from below such as when the container 1 is submerged in stored water.

Control circuit 4 mounted on this circuit board 41
2 uses the microcomputer 43. As shown in FIG. 6, the microcomputer 43 has an output signal from a switch board 180 located inside an operation panel 118 provided on the front surface of the beak-shaped projection 4a projecting forward of the shoulder member 4, Sensor 18, reed switch 20, temperature fuse 672, heater sensor 67
In response to various detection signals such as 5, boiling and heat retention operation control,
Sheath heater 8 when the inner container 31 is not housed
Blocking the energization of a and 8b, or from the heating plate 8 to the inner container 31
For some reason, the heat conduction to the bottom sensor 18 is deteriorated, and the content of the liquid detected by the bottom sensor 18 is low.
When the heat sources a and 8b are continuously energized and the heat source abnormally rises in temperature, control such as operation of the buzzer 678 and warning lamp 679 is performed, and the operation display and display control by timer setting are performed.

The buzzer 678 is provided on the circuit board 41, and the warning lamp 679 is provided on the switch board 180 provided under the operation panel 118 for mode setting and various displays.

At the upper end of the body 1, the body 1 formed by the shoulder member 4 is formed.
A container cover 6 for covering the upper end opening 1a of the container is provided.
As shown in FIG. 1, the container lid 6 is pivotally attached to the shoulder member 4 by a hinge pin 68 so as to be openable and closable at the rear portion. The vessel lid 6 is pivotally attached to a partially open type bearing 69 integrally formed with the shoulder member 4, and the hinge pin 68 can be detached from the bearing 69 when the vessel lid 6 is open. .

By attaching / detaching the hinge pin 68, the container lid 6 can be attached / detached, and it is easy to wash itself or to supply / drain the content liquid with the inner container 31 accommodated in the container 1.

The free end of the body lid 6 advances and retreats under the guidance of the back plate 81 of the body lid 6, and when the body lid 6 is closed, a part of the shoulder member 4 is urged by the spring force. A lock member 71 that locks the container lid 6 in a closed state by engaging with a not-shown locking portion is provided.

The lock member 71 is connected to a lock release lever 79 by an appropriate motion transmitting mechanism such as a cam portion and a lever of the lock release lever 79, and an operating portion of the lock release lever 79 is raised to rotate about a shaft 73. As a result, the lock member 71 is retracted against the spring and the lock is released.
At the same time, by further lifting the operation portion of the lock release lever 79, the body lid 6 can be opened upward as it is after the release of the lock.

The initial upward movement of the operating portion of the lock release lever 79 is performed by, for example, moving the operating portion of the lock release lever 79 on the side opposite to the operating portion with the thumb. Since it is said to be pressed with the index finger, it can be performed by a continuous and simple operation.

As shown in FIGS. 1 and 2, a shoulder member 32 made of synthetic resin is provided at the upper end of the inner container 31, and a flange 31a of the inner container 31 is received at the step portion at the lower end of the shoulder member 32 so as to receive a screw 345.
It is fixed at.

When the inner container 31 is housed in the body 1,
The shoulder member 32 is fitted to the shoulder member 4 of the body 1 as shown in FIG. 1 to form a double shoulder structure. Here, the shoulder member 32 of the inner container 31 also has a beak-shaped protruding portion 32a, and is fitted into the recessed portion 4b of the beak-shaped protruding portion 4a of the shoulder member 4 of the body 1.

The base portion is connected to the lower portion of the inner container 31 at the front portion of the outer surface of the inner container 31 and rises up, forming a bending path 33a which bends downward at a position higher than the full-water position A of the inner container 31 so that the content liquid is discharged. A content liquid pouring path 33 facing a position where the liquid can be poured out of the container 1 is provided. Reference numeral 33b denotes a spout formed at the downward tip of the bent path 33a.

The contents liquid pouring path 33 includes the bending path 33a, and the inner container 31 together with the upper end opening 1a with respect to the body 1.
The inner container 31 and the bent path 33a are provided on the side of the body 1 for this withdrawal.
It has an inner peripheral surface shape including the recessed portion 4b, which is necessary for the content liquid pouring path 33 including the above to be taken in and out in the vertical direction.

The pouring outlet 33b of the bent passage 33a of the content liquid pouring passage 33 is, as shown in FIG. 1, a pouring opening that is slightly inward and upward in the middle of the front portion of the concave portion 4b of the beak-like protruding portion 4a of the body 1. When the inner container 31 is taken in and out of the body 1 through the outlet 201, it is vertically taken in and out of the beak-shaped protrusion 4a, and in the state where the inner container 31 is fitted in the body 1, the spout 3
3b faces the beak-shaped protrusion 4a so that the content liquid can be substantially discharged to the outside of the container 1.

Therefore, the content liquid pouring path 33 is positioned independently of the opening and closing of the vessel lid 6 together with the inner container 31, and the pouring outlet 33b faces the beak-like protruding portion 4a so that the content fluid can be discharged to the outside of the vessel 1. Allow to dispense.

A discharge passage 202 is provided in the beak-shaped protrusion 4a, and the content liquid discharged from the pouring port 33b of the content liquid pouring path 33 is once exposed to the atmosphere and then received and guided obliquely downward to the front, The content liquid can be gently discharged without splashing through the opening 203 at the bottom of the protrusion 4a.

Here, the discharge passage 202 is the content liquid discharge passage 3
3 receives the content liquid discharged from the pouring port 33b of 3 and guides it. However, since the guiding direction is the obliquely lower front direction, the pouring port 33b of the content liquid pouring path 33 is located in the body of the container 1. On the other hand, even if the liquid does not significantly project outward, the liquid to be discharged can be guided and discharged to a position greatly separated from the body of the container 1 by the guide of the discharge passage 202, and the liquid can be discharged from the body around the body like a teapot. Is small, and it is possible to make it convenient for injecting a liquid having a shape such that this mouth is difficult to approach the container 1.

Therefore, the pouring port 33b of the pouring liquid 33 for guiding the pouring liquid to the outside of the container 1 and discharging it.
The whole of up to and including the inner container 31 can be put in and taken out of the container 1 without being restricted by the opening and closing structure of the container lid 6 and the like. This is achieved by reducing the outward protrusion from the body of the body 1, and the structure for taking in and out with the inner container 31 of the content liquid pouring path 33 can be simplified, and for opening and closing the vessel lid 6. Therefore, there is an advantage that it is not necessary to adopt a complicated connection structure in the middle of connection or disconnection.

Moreover, in order to properly connect and disconnect the passages due to the opening and closing of the vessel lid 6, the passages can be aligned with each other and the seal structure capable of separating and contacting each other can be provided. Eliminates the need for the seal structure and eliminates the inconvenience of frequently replacing the seal structure due to fatigue over time.

A transparent pipe 340 is formed at an intermediate portion of the content liquid pouring path 33, and the liquid level of the content liquid flowing into this is made of a resin protective cover 38 provided on the front surface of the inner container 31.
It can be seen from the outside through the liquid volume display window 37. Further, slits 2c and 3b corresponding to the liquid volume display windows 37 of the inner case 2 and the outer case 3 are provided on the body 1 side so that the liquid volume in the inner container 31 can be seen from outside the body 1. There is.

A transparent cover sheet 600 is attached to the slit 3b of the outer case 3, and a display such as a scale corresponding to the see-through liquid level is provided by printing or the like.

In the protective cover 38, the rearward projecting pieces 38a are fitted on the upper and lower parts of the transparent tube 340 of the content liquid pouring path 33, and the content liquid pouring path 3 is located at the lower position of the front part of the inner container 31.
The lower part is attached by utilizing the structure of the connection part between the inner container 31 and the inner container 31, and the upper part is retained by being fitted into the beak-shaped protrusion 32a of the shoulder member 32 from below, together with the beak-shaped protrusion 32a of the shoulder member 32. It covers the outside of the liquid pouring path 33. Accordingly, when the inner container 31 is taken out of the container and handled independently, it is possible to avoid the content liquid pouring path 33 from coming into contact with another object or being caught and receiving an external force.

Further, since the bent path 33a is bent downward at a position higher than the full-water position A of the inner container 31 to allow the above-mentioned liquid content to be poured out, the liquid content is filled to the full-water position A in the liquid content. It is also possible to prevent this from overflowing from the bent path 33a of the content liquid pouring path 33 and spontaneously flowing out.

A transparent tube 340 is provided below the content liquid pouring path 33.
This is done by connecting a metal connection pipe 603 fitted in a connection port 602 formed in the body of the inner container 31 via a resin elbow 604 such as silicon rubber, and the lower part of the protective cover 38 is transparent. It is adapted to be stabilized via a tube 340.

At the lower end of the protective cover 38, a finger hook hole 60 is provided.
7 is formed, and when the handle 671 shown in FIG. 2 in which the inner container 31 is connected thereto is grasped and withdrawn from the body 1,
When the finger of the other hand is hung on the finger-holding hole 607 to lift the bottom of the inner container 31, it becomes easy to incline the inner container 31 and discharge the content liquid.

A water stop valve 76 at the time of falling is provided in the middle of the bent path 33a of the content liquid pouring path 33.

A bellows pump 101 is provided between the body lid 6 and the back plate 81. The bellows pump 101 is pressed by a pressing plate 102 exposed on the upper surface of the body lid 6, and pressurized air is discharged from the outlet 1.
It is designed to be discharged from 03 and sent into the inner container 31.

When the pressurized air is sent into the inner container 31, the content liquid is pressurized to try to push it out, so that the content liquid can be poured out of the vessel 1 through the content liquid discharge passage 33 and poured into the discharge passage 202. .

On the lower surface of the back plate 81 of the vessel lid 6, the inner container 3
An inner lid 85 made of metal for closing the mouth portion of No. 1 is applied and fixed with a screw 83. A seal packing 84 facing the rim of the inner container 31 is sandwiched between the outer periphery of the inner lid 85 and the back plate 81, and when the body lid 6 is closed, the inner lid 85 is the seal packing 84. The inner container 31 is closed by contacting the rim of the inner container 31.

Between the back plate 81 and the inner lid 85, as shown in FIG. 1, a steam passage 87 for letting the steam generated in the inner container 31 escape to the outside is provided with the air discharged from the spout 103. The auxiliary plate 104 is formed so as to also serve as a part of the passage leading into the container 31.

The steam passage 87 has an opening 86 in the inner lid 85 which also serves as air supply to the inner container 31 side, and an opening 52 to the outside on the upper surface of the rear side of the body lid 6.

A valve port 105 located in the middle of the steam passage 87 is formed between the auxiliary plate 104 and the back plate 81 of the steam passage 87, and a body is formed between the auxiliary plate 104 and the inner lid 85. 1 shuts off the valve opening 105 when the valve 1 falls over.
06 is provided.

On the other hand, a holding cylinder 112 having a longitudinal slit 112a is provided in the center of the back surface of the bellows pump upper plate 111 located inside the pressing plate 102, and a hollow valve rod is provided on the inner circumference of the holding cylinder 112. 113 is vertically slidably fitted into the slit 112a and the hook 113a at the upper end is fitted.
And the valve rod 113 is urged downward by a spring 114 that is exerted between the valve rod 113 and the bellows pump upper plate 111, and the valve rod 113 has the slit 112a.
The maximum downward movement position from the holding cylinder 112 is restricted by the engagement of the hook 113a with the hook 113a.

The lower end of the valve rod 113 is fitted in an opening 115 provided at the center of the back plate 81 so as to be vertically slidable.

At the circumferential position around the central opening 115 of the back plate 81, the outer peripheral portion is annularly sandwiched between the back plate 81 and the auxiliary plate 104, and the inner peripheral portion is the outer periphery of the lower end portion of the valve rod 113. The valve portion 11 fitted over the opening 86 and positioned on the rim of the opening 86.
A valve membrane 116 having 6b is provided.

As a result, the valve membrane 116 prevents the pressurized air from leaking and the steam from entering the bellows pump upper plate 111 through the gap at the fitting portion between the valve rod 113 and the opening 115. The portion 116a is the pressing plate 1
When the bellows pump upper plate 111 is moved downward by pressing by 02, the valve rod 113 is moved together with the bellows pump upper plate 111, so that the bellows pump 10 is quickly pressed against the edge of the opening 115, and the bellows pump 10
1 and the inner container 31 as a part of the steam passage 87 and the valve rod 11
3, the bellows pump 101 obtained thereafter can pressurize enough compressed air into the inner container 31 by a sufficient pressing stroke of the bellows pump 101 to pressurize the content liquid to be discharged. The bellows pump 101 is repeatedly pressed while the valve portion 116a is not separated from the edge of the opening 115, so that the pressurized pouring operation of the content liquid is interrupted without the pressurized air being released. You can continue to do so.

Further, an opening 52 to the outside of the steam passage 87 is provided at a position closer to the hinge pin 68 side of the vessel lid 6, and a valve opening 612 is also provided immediately below the opening 52. When the body 1 falls, a water stop valve 613 is provided for closing, which closes the valve opening 612 by pressing by its own weight or the content liquid. The water stop valve 106 for the fall together with the steam for the fall of the body 1 It is easier to prevent the content liquid from flowing out through the passage 87.

In the present embodiment, notches are made at several points on the opening edge of the opening 115 which is closed by the water shutoff valve 106 at the time of overturning, taking advantage of the safety against the outflow of the content liquid.
Therefore, when the body lid 6 is suddenly closed, in the conventional case in which there is no such cut, in the fall, the water stop valve 106 partially fits into the opening 115 due to its own inertia and is crimped, thereby The unbalanced state, that is, the internal pressure is maintained in a pressure-bonded state under the influence of becoming a high pressure, and the internal container 31 may be naturally pressurized. It is possible to prevent the close contact and the close contact to be maintained, and prevent the spontaneous pressurization as described above from occurring.

A hot water storage portion 615 is provided between each installation portion of the water shutoff valves 106 and 613 at the time of fall of the steam passage 87, and when the body 1 falls, the cutout 614 causes the liquid content to vaporize. When trying to flow out through passage 87,
This is temporarily stored to prevent it from leaking to the next, and it is delayed. A return port 616 is provided to return the content liquid that has flowed out or condensed into the vapor passage 87 when the container cover 6 is opened into the inner container 31. The return port 616 includes a container body. Inner container 3 while lid 6 is closed
A seal packing 617 which is in contact with the inner peripheral surface of the first shoulder member 32 and closes the return port 616 is attached.

Also, the upper plate 111 of the bellows pump 101.
An intake valve 211 made of resin is provided in a part of the intake valve 21 when the bellows pump 101 is restored after the pressing operation.
1 is opened so that outside air can be sucked in through an intake port (not shown). At this time, the intake port is the bellows pump 101.
Since it is located far from the inside of the inner container 31 and close to the outside, it is easy to suck cold air. Therefore, bellows pump 1
When 01 is pressed, the expansion of the air when the air in the bellows pump 101 is blown into the inner container 31 can be expected greatly, and the pressurization efficiency of the content liquid can be improved. A pouring lock member 212 is provided around the portion of the body lid 6 where the pressing plate 102 is provided to prevent the pressing plate 102 from being pushed down by the rotational position and to release the blocking. It is operated by an operation protrusion 212a protruding on the upper surface of the.

Further, in this embodiment, the heating plate 8 is attached to the inner container 31.
The size is almost equal to the bottom of the. As described above, a large-capacity seed heater 8a for boiling water is provided in the outermost peripheral portion of the hot platen 8, and a small-capacity seed heater 8b for heat retention is provided inside thereof in an annular shape.

The sheathed heater 8b for keeping heat is connected to both terminals 8b ₁
The sheath heater 8a for boiling water has an open annular shape in which the terminals are separated from each other in an annular direction, and both terminals 8a ₁ of the sheath heater 8a for heating water are annularly separated from the terminals 8b ₁ of the sheath heater 8b for keeping heat.
A closed annular shape is formed in which the b ₂ and the outer circumference of the heating platen 8 are overlapped in the inner and outer directions.

In such a configuration, the heater of the heating platen 8 is divided into the large-capacity seed heater 8a for boiling water and the small-capacity seeding heater 8b for keeping heat, so that the total capacity is increased. Even if it is energized, a large-capacity sheathed heater 8a can be distributed to each part of the hot platen 8, and a large-capacity sheathed heater 8a is provided at the outermost peripheral part of the hot platen 8 having a size almost equal to the bottom of the inner container 31. By using the diameter portion to disperse heat in the annular direction and by making both terminal portions 8a ₁ overlap inside and outside, it is possible to disperse the heat in a circumferential length region longer than the length of one round of the large diameter portion of the heating plate 8. In addition, the overlapping portion 8a ₂ of the both terminals 8a ₁ has the both terminals 8 of the sheathed heater 8b for heat retention.
and not face the annular direction spaced portion 8b ₂ between b _1, the heat of the concentration is also avoided between the sheathed heater 8b for thermal insulation, large capacity relatively small heating plate 8 sheathed heater 8a
It is possible to prevent the melting of the hot platen 8 from occurring even if the water heater is provided and water is heated at a sufficient speed.

In this case, since the sheathed heaters 8a and 8b for boiling water and for keeping heat are embedded in the bead-shaped raised portion 8d on the back surface of the heating plate 8, the inner container 31 of the heating plate 8 is formed.
It is possible to efficiently transfer the heat from the sheathed heaters 8a and 8b to the heating platen 8 while ensuring the close contact with the bottom and preventing the wall thickness from becoming excessive, and for boiling water. The overlapping portions of both terminal portions of the sheathed heater are embedded in the same bead-shaped raised portion, and the bead-shaped raised portion forms a portion having a large heat capacity. Since the heat is sufficiently dispersed and transmitted to the main body of the heating plate, it is possible to prevent local concentration of heat due to the overlap.

Heaters 8a and 8b are provided on a part of the heat shield plate 12.
The drain port 700 is provided at a position avoiding the terminals 8a ₁ and 8b ₁ , the circuit housing box 40, other electronic devices and wiring, and the side of the drain port 700 is lowered. In this way, even if water or the like enters the body 1, it will be discharged from the drain port 700 to a location on the bottom of the body 1 that does not cause an electrical problem and go outside.

The heating plate 8 is provided with radial ribs 8e to suppress thermal deformation as much as possible and to improve the adhesion with the bottom of the inner container 31. Further, by mounting with the screws 11 using the mounting legs 8f located at two places on the diameter line in the central portion of the heating plate 8, even if the heating plate 8 is deformed by heat, this is fixed on both sides of the mounting portion and the heating plate 8 To prevent the heat plate 8 from being distorted by exerting a restraining force against the thermal deformation, and also by ensuring the adhesion of the heat plate 8 to the bottom of the inner container 31. You can

Further, mounting guides 8g are provided at several places on the back surface of the heating plate 8 and are guided to the upper surface of the heat shield plate 12 so that the heating plate 8 is thermally deformed in a planar manner. The adhesion with the bottom of the inner container 31 can be guaranteed.

The warning control by detecting the abnormal temperature rise of the heater sensor 675 will be described. The heater sensor 675 can accurately detect the temperature of the heating plate 8 as a heat source by the heat conduction from the heating plate 8 as described above. If the temperature detected by the heater sensor 675 becomes equal to or higher than a preset reference value, it is possible to accurately determine whether the heat source has an abnormal temperature rise. The computer 8 judges and the heater 8
While turning off a and 8b, the buzzer 678 and the warning lamp 679 are activated.

Since the heaters 8a and 8b are turned off, it is possible to avoid further temperature rise, and it is possible to improve the safety of the equipment and use.

Further, the operation of the buzzer 678 can inform the user of the abnormality away from the electric pot, and the warning lamp 679 works to display the buzzer on the operation panel 118. The user can be informed that the abnormal temperature rise is due to an abnormal temperature rise, or the user who is nearby can be notified, so that the user can be prompted to take appropriate measures so that the user can properly use the device.

Instead of the buzzer, it is possible to give a warning by voice. According to this, the contents of the abnormality can be transmitted to the user simultaneously with the warning without a visual display.

Further, since a warning is taken to take immediate action, control for turning off the heaters 8a and 8b is not essential. However, in terms of safety, it is preferable to perform such control.

[0085]

EFFECT OF THE INVENTION According to the electric hot water storage container of the present invention, which is detachable, the heating plate having substantially the same size as the bottom of the inner container, the large-capacity seed heater for boiling water, and the small-capacity heat insulating container Due to the characteristic arrangement with the sheathed heater, the heat from the sheathed heater is well dispersed to each part of the heating plate even in the energized state at the full capacity, and even if a large capacity sheathed heater is provided and boiling is performed at a sufficient speed. Since it is possible to avoid the melting of the hot platen, it is possible to secure the safety of use and obtain sufficient boiling performance.

Therefore, in the case of an electric hot water storage container in which the inner container is housed so that it can be taken in and out of the container and is mounted on the hot plate so that it can be detached, the heating of the content liquid is indirect, but the above hot plate is used. As a result, a sufficient heating state can be obtained, and a more convenient sufficient heating function of the electric hot water storage container and safety of use can be guaranteed.

Moreover, by disposing both terminals of the sheathed heater for boiling water having a large capacity so as to overlap the inside and outside, heat is dispersed in a circumferential length region longer than the length of one round of the large diameter portion of the heating plate, Moreover, since the overlapping portion of the both terminal portions faces the annularly separated portion between the both terminals of the heat insulating sheathed heater, heat concentration between the heat insulating sheathed heater and the sheathed heater is avoided, so that the heater capacity is improved. And the thermal safety of the hot platen can be increased.

In this case, by embedding each of the sheathed heaters for boiling water and for keeping heat in the bead-shaped raised portion on the back surface of the heating plate, the close contact with the bottom of the inner container of the heating plate is ensured and the thickness is unnecessarily increased. The heat from the sheathed heater is efficiently conducted to the hot platen while preventing the above, and the overlapping portion of both terminals of the sheathed heater for boiling water is embedded in the same bead-shaped ridge. Due to the large heat capacity of the raised portion, the heat of the portion where the two terminal portions are adjacent and overlapped is sufficiently dispersed, so that the localized concentration of heat due to the overlap can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric pot as a first embodiment of an electric hot water storage container to which the present invention is applied.

2 is a perspective view of the electric pot of FIG. 1. FIG.

FIG. 3 is a cross-sectional view showing a buried state of a heater of a heating plate of the electric pot of FIG.

FIG. 4 is a bottom view of the heating platen of FIG.

5 is a perspective view of the heating plate of FIG. 3 viewed from the lower surface side.

6 is a block diagram showing a control circuit of the electric pot of FIG. 1. FIG.

[Explanation of symbols]

1 Body 8a Sheath heater for boiling water 8b Sheath heater for keeping heat 8 Hot platens 8a ₁ and 8b ₁ Terminal 8a ₂ Overlapping part 8b ₂ Annular direction separating part 8d Bead-like raised part 31 Inner container

Claims (4)

[Claims] 1. An electric hot water storage container comprising a hot plate having a sheathed heater in the bottom of the body and capable of heating the liquid content in an inner container in contact with the bottom. With a size almost equal to the bottom of the vessel, a large-capacity seed heater for boiling water is provided in the outermost peripheral part of the heating plate, and a small-capacity seed heater for heat insulation is provided inside the annular heater.
The sheathed heater for heat insulation has an open annular shape in which both terminals are separated in an annular direction, and the sheathed heater for boiling water has both terminals, and the sheathed heater for insulation has an annular separation between both terminals and the heating plate. An electric hot water storage container having a closed annular shape that is positioned so as to overlap with the outer circumference in the inner and outer directions. 2. The electric hot water storage container according to claim 1, wherein the inner container is housed so that it can be taken in and out of the body, and is mounted on a hot plate so as to be removable. 3. The sheath heater for heat insulation has an open annular shape in which both terminals are separated from each other in an annular direction, and the sheath heater for boiling water has a volume terminal portion, and the sheath heater for heat insulation has an annular spacing between the volume terminals of the sheath heater for heat insulation. The electric hot water storage container according to any one of claims 1 and 2, wherein the electric hot water storage container has a closed annular shape in which the portion and the outer circumference of the hot platen overlap each other in the inner and outer directions. 4. Each of the seed heaters for boiling water and for keeping warm is embedded in a bead-shaped raised portion formed on the back surface of the heating plate, and the overlapping portions of both terminals of the sheath heater for boiling water are embedded in the same bead-shaped raised portion. The electric hot water storage container according to claim 3, wherein the electric power storage container is removable.