JPH071068Y2 - Electric hot water storage container - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water storage container such as an electric kettle that can be used at home.

[0002]

2. Description of the Related Art This kind of electric hot water storage container is widely used to store hot water for beverages such as coffee and tea.

By the way, in most cases, the electric hot water storage container contains tap water, which is heated to a predetermined temperature and then kept at the predetermined temperature, or if necessary, left in that heat state or re-boiled and then used. I am offering it to.

[0004]

[Problems to be solved by the invention] The first boiling or re-boiling not only adapts the liquid temperature to the purpose of use, but also serves for sterilization and odor emission. However, chlorine compounds contained in tap water,
Particularly, many harmful substances such as trihalomethane still remain, and it is desired to remove them sufficiently.

Therefore, the contents liquid is kept in a boiling state for a long time, or the contents liquid is repeatedly boiled for a certain period of time to remove the chlorine.

However, the boiling state of the content liquid is at a high temperature and in a disturbed state. Therefore, it is dangerous to continue the boiling state for a long time or to repeatedly bring the boiling state into use, and it is better not to draw out the content liquid while continuing or repeating the boiling. However, it is inconvenient to use because the use time of the content liquid is delayed by that amount.

In addition, since the high temperature use condition increases, the life of the electric hot water storage container also decreases.

On the other hand, descaling is also performed by aerating the content liquid. However, if air is simply blown into the content liquid, the air does not reach every corner of the content liquid, and even in the part where the air of the content liquid enters, each part of the content liquid and the air come into contact with each other in detail. Since it does not match, it is not possible to effectively remove khaki.

Blowing air through the porous member is also conceivable, but it is difficult to reach the whole and the porous member is difficult to clean and tends to impair hygiene.

In view of the above points, it is an object of the present invention to provide an electric hot water storage container capable of reliably achieving aeration-type descaling and eliminating the above-mentioned conventional problems. .

[0011]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention circulates the content liquid by repeatedly leading the content liquid out of the container and returning it to the container again. It is characterized in that it is provided with a circulation means and an injector for sucking the outside air by the circulating flow of the content liquid and mixing it with the content liquid in the middle of the circulation path of the content liquid.

It is possible to further include control means for operating the content liquid circulating means in the water heating mode for heating the content liquid to the boiling point and for stopping the content liquid circulating means when the content liquid reaches a predetermined temperature.

In the content liquid circulation passage, the tip of the branch passage branched from the middle of the discharge passage for discharging the content liquid from the bottom of the container to the upper portion outside the container by pumping up the electric pump is connected to the top of the container. It is possible to provide an injector in this branch path.

[0014]

In the above structure of the present invention, the content liquid circulating means draws the content liquid out of the container and then returns it to the container again to repeatedly circulate the content liquid. An injector is located in the middle of the circulating path of the content liquid, and the negative pressure created by the liquid flow of the circulating content liquid sucks the outside air into the circulation path to circulate the content liquid circulating in the limited narrow passage. It is continuously mixed in the form of foam. As a result, the contents liquid circulated is circulated while forcibly contacting and disturbing the outside air and the details that are mixed in the liquid flow, and this is spread over the entire contents liquid. Can be aerated.

When the control means operates in the water heating mode for heating the content liquid to boiling, the content liquid circulating means is activated, and when the content liquid reaches a predetermined temperature, the content liquid circulating means is stopped by the action of the control means. It is possible to aerate the content liquid by utilizing the long rising time required for the content liquid to boil in the boiling water mode and avoiding the dangerous state where the content liquid is boiling.

When the circulation path uses the content liquid outlet path in a timely manner by switching the passage switching valve, and the pump for discharging the content liquid also serves to circulate the content liquid.
The structure for removing the chlorine can be simplified without affecting the extraction of the content liquid.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 to 6 will be described.

The present embodiment shows the case of an electric pot capable of boiling water and discharging the content liquid by a non-pressurized type electric pump. As shown in FIG. 1, the inner container 2 in which the heater 61 is applied to the lower surface of the bottom is housed in the outer case 3 to form the body 1.

The inner container 2 receives an upper end flange by a shoulder member 4 made of synthetic resin, which is forcibly fitted to the upper end of the outer case 3.

A bottom ring 5 made of synthetic resin is applied to the lower end of the outer case 3, and the bottom ring 5 and the bottom of the inner container 2 are connected by a connecting fitting (not shown) to form the outer case 3 and the inner container 2. And the bottom ring 5 are integrated with each other. A bottom lid 10 is attached to the opening of the bottom ring 5 by fitting a plurality of claws and fixing it with a screw at one place. The bottom lid 10 is rotated at its outer peripheral portion by a plurality of claws 8 provided on the bottom lid 10. The seat body 9 is rotatably fitted, and when the body body 1 is stationary, the body body 1 can be rotated on the rotary seat body 9.

A lead-out path 11 for leading out the content liquid is connected to the bottom of the inner container 2. This lead-out path 11 is a space between the inner container 2 and the outer case 3, and rises up into a beak-shaped protrusion 12 provided in the front portion of the shoulder member 4, and U is formed at this portion.
The discharge port 19 is bent downward and opens downward. A derivation pump 13 for delivering the content liquid flowing into the derivation path 11 to the discharge port 19 is provided in a portion of the derivation path 11 below the inner container 2, and is driven by a motor 14.

The content liquid discharged from the discharge port 19 is once exposed to the atmosphere, and then provided on the lower cover 15 attached to the front part of the exterior case 3 which is fitted to the lower side of the beak-shaped protrusion 12. The liquid is received by the liquid injection guide 16, guided by the liquid injection guide 16, and injected. The liquid injection guide 16 has a double pipe structure, and the liquid to be discharged is easily opened to the atmosphere, and at the time of liquid injection, the outside air is sucked in to form a fine foam in the liquid injection together with the foam breaking net 20 to be extremely quiet. Moreover, it is possible to inject liquid without bounce.

The rising portion of the outlet path 11 is provided with a liquid amount detecting portion 21 for detecting the liquid amount by using the same liquid level as the inner container 2 by a capacitance method or a photo sensor method. A water shutoff valve 22 for a fall is provided immediately upstream of the bent portion of the outlet path 11.

A heat shield plate 24 is screwed under the bottom of the inner container 2 by using a metal fitting 23, and a restraining spring 28 is sandwiched between the heat shield plate 24 and the back side of the heater 61, whereby a heater is provided. 61 is pressed against the bottom surface of the bottom of the inner container 2. The motor 14 is attached to a part of the heat shield plate 24.

A temperature sensor 33 for sensing the temperature of the content liquid is provided in the central through hole of the heater 61, and a holding plate 35 screwed to the heat shield plate 24 holds the temperature sensor 33 via the heat shield wall. are doing.

The bottom ring 5 is provided with a circuit housing box 41. The circuit housing box 41 includes a lid portion 42 integrally formed with the bottom ring 5, and a container portion 44 attached to the lid portion 42 from below. A seal packing 47 is sandwiched at a joint between the container portion 44 and the lid portion 42 to form the circuit housing box 41 as a hermetic container. This makes the circuit board 48 housed in the circuit housing box 41 waterproof enough.

A body lid 62 is provided on the upper end of the body 1. The body lid 62 has a hinge pin 6 attached to the shoulder member 4 at the rear portion thereof.
It is pivotally attached by means of 3. This pivotal attachment is performed on a bearing member 64 that is detachably fitted to the shoulder member 4, and the body lid 62 can be attached and detached by attaching and detaching the bearing member 64. This makes it easy to clean the inside of the container 1 and to supply and discharge the content liquid.

The bearing member 64 is inserted into the recess 65 of the shoulder member 4 from above, and the resin spring piece 164 is elastically engaged with the locking portion 66 in the recess 65 to prevent accidental disengagement. In order to surely lock the bearing member 64 in the mounted state and to release it, the hook member elastically engages with a part of the bearing member 64 inserted into the recess 65.
The lock member 67 is slid in the lock releasing direction against the spring 221 to release the lock.

The body lid 62 is connected to the bearing member 64 by the spring 6
8 is urged in the opening direction, and the closed state is the vessel lid 62.
The lock member 69 provided at the front end portion of is locked by being engaged with the locking portion 72 provided at a part of the shoulder member 4 by the bias of the spring 71.

The lock member 69 is guided forward and backward by a projection 83 formed on the upper surface of the back plate 82 of the body lid 62.

On the slope 75 of the lock member 69, the container lid 6 is attached.
A protrusion 78 at the tip of a lock release lever 77 pivotally attached at the rear by a shaft 76 is in contact with the bearing 601 in the second bearing 601. The lock release lever 77 is the lock member 69.
When the spring 71 is advanced to the engagement position, it is pushed upward by the slope 75 through the protrusion 78, and the operation portion 79 at the tip end is moved from the upper surface opening 81 of the body lid 62 to the body lid. It is exposed so as to be flush with the surface of 62.

When the operating portion 79 is pushed down in this state, the lock release lever 77 is rotated counterclockwise and the projection 78
The sloping surface 75 of the lock member 69 is pushed by the lock member 69 against the spring 68, and the lock member 69 is retracted to disengage from the locking portion 72. Therefore, the lock of the body lid 62 in the closed state is released. At the time when this lock release is completed, there is a play in the unlocking direction between the lock release lever 77 and the body lid 62, and the body lid 62 is released from the pressing operation of the lock release lever 77. It is slightly rotated in the opening direction by the spring 68 regardless of whether it is performed or not.

As a result, the lock member 69 is slightly displaced upward from the position of the locking portion 72, so that the lock member 69 is again moved to the locking portion 72 by the natural operation of releasing the lock and releasing the hand from the operating portion 79. The body lid 62 is automatically opened to the fully opened state by the spring 68 without any engagement.

The lock release lever 77 has a safety member 111.
a is working. The safety member 111a is supported by the body lid 62 so as to be slidable in the longitudinal direction of the lock release lever 77. When the operating portion 112a is slid, the locking portion 113a moves to the unlock lever 7.
7, the lock release lever 77 is prevented from moving when it is advanced and retracted under the tip of the lock lever 7, and the lock release lever 77 is prevented from being inadvertently released.

A spring piece 84, which comes into pressure contact with the outer peripheral portion of the bearing member 64, is attached to the rear portion of the body lid 62 by a screw 185. This spring piece 84 is in sliding contact with the outer periphery of the bearing member 64 when the container lid 62 is opened and closed, and exerts a brake on the opening operation when the container lid 62 is opened by the spring 68.
Therefore, the automatic opening operation of the container lid 62 at the time of releasing the lock is performed slowly.

The inner container 2 is provided on the lower surface of the back plate 82 of the body lid 62.
An inner lid 85 made of metal for closing the rear part is applied, and is screwed at a position not shown. A seal packing 86 facing the rim of the inner container 2 is sandwiched between the outer periphery of the inner lid 85 and the back plate 82, and when the container lid 62 is closed, the inner lid 85 is the seal packing 86 portion. The inner container 2 is closed by coming into contact with the rim of the inner container 2.

A steam passage 87 is provided between the inner lid 85 and the back plate 82 for allowing steam generated in the inner container 2 to escape to the outside. The steam passage 87 has an opening 88 to the inner container 2 side in the inner lid 85, and an opening 89 to the outside on the upper surface of the rear side of the vessel lid 62. A valve chamber 91 fitted to the back plate 82 from below is provided in the opening 88, and a water stop valve 92 at the time of tipping is provided in the valve chamber 91 which is closed when the body 1 falls.

Immediately downstream of this valve chamber 91 is a vessel lid 62.
The first pool 93 with a wide space reaching the upper part of the
When the body 1 falls over to the left or right and the content liquid tries to flow out through the steam passage 87 without being stopped by the water shutoff valve 92 at the time of the fall, the content liquid to flow out is The first reservoir 93 is stored, and the outflow to the downstream side is suppressed and prevented until the content liquid overflows.

Control circuit 1 mounted on the circuit board 48
00 is the one using the microcomputer 101. The derivation operation key 102 provided on the operation panel 201 provided on the upper surface of the beak-shaped protrusion 12 is provided so as to press the pressure sensor 103, and the pressure sensor 103 electrically detects the difference in the pressing force during the derivation operation. By converting the signal into a signal and inputting it to the microcomputer 101, the drive voltage of the derivation pump 13 is switched to control the derivation flow rate to increase or decrease.

The operation panel 201 is as shown in FIG. 2, and in addition to the derivation operation key 102, the reboil key 104,
Timer setting key 105, derived lock / unlock key 106
And liquid amount display unit 107, boiling, descaling, and heat retention display units 108 to 110, and timer set time display unit 111.
~ 113 are provided.

Each time the derivation lock / release key 106 is operated, the setting mode is changed to a rotary type.

FIG. 5 shows a control circuit. In the microcomputer 101, as shown in the figure, the electric and electronic parts related to the various inputs and outputs are A / D converters 301 and 302, a switch circuit 303, a drive circuit 304, a display circuit. It is properly connected via 305.

On the other hand, the heater 61 is also connected to the microcomputer 101 through the drive circuit 304 and is energized and controlled so as to boil the content liquid until boiling or keep the content liquid at a predetermined temperature which does not result in boiling. ing.

The energization in the boiling state is carried out by the temperature sensor 33 (FIG. 1) when the liquid temperature is lower than the heat retention temperature and the temperature is required to boil the water, and when the boiling key 211 is turned on in the heat retention state. Temperature sensor 33
When the boiling temperature is detected, it is returned to the heat retention state.

Further, when electricity is supplied in the boiling water state, the lead-out pump 13 is operated to circulate the content liquid while sucking and mixing the outside air into the content liquid, thereby performing aeration-type descaling. .

This descaling is stopped when the content liquid reaches a predetermined temperature, for example, a heat retention temperature of 80 ° C.

With this, it is possible to remove the scaly sufficiently by taking a relatively long time until the content liquid rises to 80 ° C. while avoiding a dangerous state where the content liquid is in a boiling state.

In order to remove this scaly, a branch passage 402 is branched and connected via the electromagnetic switching valve 401 between the liquid amount detecting portion 21 of the discharge passage 11 and the water stop valve 22 at the time of fall, and the electromagnetic switching valve 401 is connected. The content liquid led out through the outlet passage 11 by the switching operation of (1) can be selectively guided to the discharge port 19 side or the branch passage 402 side.

The electromagnetic switching valve 401 is also connected to the microcomputer 101 via the drive circuit 304 so that this switching can be automatically performed in a timely manner.

The tip of the branch path 402 is connected to a portion just above the set full water level F of the inner container 2, and the content liquid guided to the branch path 402 is returned to the inner container 2.

Here, a part of the derivation path 11 and the branch path 402
Is a circulation path 403 through which the content liquid is circulated by the outlet pump 13.

An injector 404 is provided in the middle of this circulation path 403. The injector 404 is
A nozzle 405 that faces the return side of the content liquid is built in, and a suction passage 406 that is open to the outside is provided in a part immediately next to the nozzle 405.

The suction passage 406 is connected to a part of the outer case 3 as shown in FIG. 4 so that the air outside the container 1 can be sucked into the injector 404.

As a result, the derivation pump 13 is operated,
When the content liquid is circulated through the circulation path 403, a large negative pressure is generated in the circulating content liquid in the portion passing through the nozzle 405, and the outside air is sucked through the suction path 406 during the circulation flow of the content liquid, so that this is narrow. It is possible to forcibly contact and disturb the details by mixing bubbles in the circulating content liquid in the circulation path 403.

Since the circulation of the content liquid extends to the entire content liquid in the inner container 2, the entire content liquid can be uniformly removed completely.

A backflow prevention valve 407 is provided in the suction passage 406 of the injector 404.

Next, the heating control and the descaling operation in the heating control will be specifically described with reference to the flow chart shown in FIG.

First, when the content liquid is at a temperature required for boiling water and when reboil is set by the reboil key 104, at the same time when energization in the water boiling mode is performed, the electromagnetic switching valve 401 is turned on. While being switched to the circulation side, the derivation pump 13 is operated.

As a result, the content liquid is once discharged to the outside of the inner container 2, but again through the electromagnetic switching valve 401.
Returned inside.

For this reason, the content liquid is circulated, and when returning to the inside of the inner container 2, the outside air is sucked through the injector 404 to be in the aeration type descaling state in which it is mixed into the circulating content liquid.

This descaling operation is continued until the content liquid reaches 80 ° C. or higher, and when the derivation key 102 is operated during that time, the switching valve 401 is switched to the derivation side only during this operation.

As a result, the content liquid once discharged by the derivation pump 13 is guided to the discharge port 19 side through the electromagnetic switching valve 401 this time, and while the derivation key 102 is operated, the removal of scaly due to the circulation of the content liquid is interrupted. Then, the content liquid is discharged.

When the content liquid exceeds 80 ° C., the electromagnetic switching valve 401 is switched to the outlet side, the outlet pump 13 is stopped, and the descaling operation is completed.

However, energization in the boiling water mode continues,
The temperature of the content liquid further rises. When the content liquid boils, the energization state is switched to the heat retention mode, and the heat retention of the content liquid starts.

If the derivation key 102 is operated while the content liquid is boiling at a temperature of 80 ° C. or higher, the derivation pump 13 is operated to operate the derivation of the content liquid. To do.

The above operation is shown in a time chart of FIG.

When the timer is set, the heating conditions for obtaining the content liquid that has boiled when the set time elapses are set from the temperature rising characteristics of the content liquid at the time of boiling water, etc., and when the set time elapses. Allow the boiling liquid to be obtained.

Also in this case, descaling is performed until the content liquid reaches 80 ° C. in the boiling state.

Further, in the above embodiment, a part of the outlet passage 11 for leading out the content liquid is used for the circulation passage 403, and the outlet pump 1
Although 3 is also used as a circulation pump for removing descaling and this can be switched and used by an electromagnetic switching valve, it can be switched by a manual switching valve.

Further, the content liquid outlet passage and the content liquid circulation passage may be separately provided so as to be operated by different pumps. In this case, the content liquid may be a pressurized type or a pumped type, It is possible to derive it regardless of whether it is automatic or manual.

[0071]

According to the present invention, the content liquid circulating means draws the content liquid out of the container and then returns the content liquid into the container again to repeatedly circulate the content liquid, and in the middle of the circulation path of the content liquid. The outside air is sucked into the circulation path by the negative pressure created by the liquid flow of the content liquid that is circulated in the injector part in, and is continuously mixed into the content liquid circulating in the limited narrow passage in the form of bubbles. , The circulating content liquid is mixed into the liquid flow and is circulated while forcibly contacting and agitating the outside air and the details so that the entire content liquid is thoroughly aerated evenly. Therefore, the bleaching can be removed satisfactorily and evenly.

When the control means operates in the water heating mode for heating the content liquid to boiling, the content liquid circulation means is activated, and when the content liquid reaches a predetermined temperature, the content liquid circulation means is stopped by the action of the control means. , Using the long rise time required for boiling the content liquid in the boiling water mode, and aerating the content liquid while avoiding the dangerous state where the content liquid is boiling Can be performed sufficiently.

When the circulation passage uses the content liquid outlet passage in a timely manner by switching the passage switching valve, and the pump for discharging the content liquid is also used to circulate the content liquid, the content liquid outlet Therefore, the structure for removing the chlorine can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of an operation panel.

FIG. 3 is a block diagram of a control circuit.

FIG. 4 is a sectional view of a portion of an injector.

FIG. 5 is a flowchart showing a heating control subroutine.

FIG. 6 is a time chart of main operations in heating control and a graph showing a temperature change of the content liquid at that time.

[Explanation of symbols]

 1 Body 2 Inner Vessel 3 Outer Case 11 Outlet Path 13 Outlet Pump 33 Temperature Sensor 100 Control Circuit 101 Microcomputer 401 Electromagnetic Switching Valve 402 Branch Path 403 Circulation Path 404 Injector

Claims (3)

[Scope of utility model registration request] 1. A content liquid circulating means for circulating the content liquid by repeatedly leading the content liquid out of the container and returning it to the container again, and a circulating flow of the content liquid in the middle of the circulation path of the content liquid. An electric hot water storage container comprising: an injector that sucks outside air and mixes it with the content liquid. 2. The electricity according to claim 1, further comprising a control means for operating the content liquid circulating means in a water heating mode for heating the content liquid to boiling and for stopping the content liquid circulating means when the content liquid reaches a predetermined temperature. Hot water storage container. 3. The content liquid circulation passage has a tip of a branch passage branched from a middle of a discharge passage for discharging the content liquid from a bottom portion of the container to an upper portion outside the container by pumping up the electric pump through a passage switching valve. The electric hot water storage container according to any one of claims 1 and 2, wherein the electric hot water storage container is connected to the upper part of the above, and an injector is provided in this branch path.