JPH078258B2 - Electric hot water storage container - Google Patents

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 specifically, it has a heater for heating the content liquid and a control means for controlling the energization of the heater, and has an initial boiling mode for boiling the content liquid. The present invention relates to an electric hot water storage container.

[0002]

2. Description of the Related Art An electric hot water storage container is often used to fill water, heat it, make tea or coffee, or melt baby's milk.

The liquid content is usually boiled once and then kept warm. However, most of the content liquid is tap water, and even if it is boiled once, a smell may remain. In addition, it is difficult to remove trihalomethanes, which are toxic chlorine compounds.

In order to deal with this, it is also considered to provide a scaly removal mode in which the content liquid is once boiled and then continued to be boiled for a predetermined time, whereby odors and harmful substances are more actively emitted. .

[0005]

By the way, it is known that trihalomethane is volatile with a low boiling point. Therefore, when raw water from tap water is stored in an electric hot water storage container and heated, the trihalomethane in the content liquid should volatilize and decrease with this heating.

However, according to the experiment, as shown by the characteristic line a in FIG. 7, the amount of trihalomethane in the content liquid increases with heating.

It is considered that this is because residual chlorine in the content liquid and organic substances such as humic acid activate the reaction due to an increase in temperature of the content liquid, and the amount of trihalomethane produced exceeds the amount of volatilization. Be done.

Therefore, if the boiling state of the content liquid is simply continued to diverge the trihalomethanes as in the chlorine removal mode, the trihalomethanes cannot be effectively removed, and complete removal takes a long time. Processing is required.

However, if the content liquid is not heated, hot tea or coffee cannot be brewed, so that it is used in a state where the amount of trihalomethane is increased.

If the raw water is used as it is without heating, the odor of the raw water will not disappear, and in the body warm and full of organic matter, the chlorine contained in the raw water will react vigorously to cause much reaction. It is dangerous because it produces trihalomethane.

Therefore, in the present invention, the content liquid can be used by boiling, but the trihalomethanes and the trihalomethanes are generated by the skillful heating of the content liquid based on the above-mentioned knowledge without being affected by heating the content liquid. It is an object of the present invention to provide an electric hot water storage container capable of significantly reducing chlorine, which is a cause, and solving the above problems.

[0012]

In order to achieve the above-mentioned object, the present invention has a heater for heating the content liquid and a control means for controlling energization of the heater, and an initial boiling for boiling the content liquid. In an electric hot water storage container having a mode, when the content liquid reaches the boiling temperature of trihalomethanes having a low boiling point and volatility while executing the initial boiling mode, the boiling operation is interrupted for a predetermined time and It is characterized in that a heating control means for maintaining the liquid in the boiling point temperature range and continuing the boiling operation until the content liquid is boiled after the lapse of the predetermined time is provided.

The heating control means, when the content liquid is boiled,
It is possible to have a descaling mode for continuing this boiling for a predetermined time, and this descaling mode is
The setting can be made by operating the descaling removal setting / release means, and this setting can be released.

It is also possible to have reboil setting means and the control means to have a reboil mode in which the content liquid is boiled again from the present time when the reboil setting means is operated.

[0015]

According to the above construction of the present invention, when the content liquid reaches the boiling temperature range of the trihalomethanes during the execution of the initial boiling mode, the boiling control is interrupted by the heating control means for a predetermined time. In the meantime, while keeping the content liquid in the boiling temperature range, the generated trihalomethanes are volatilized and released actively while suppressing the formation of trihalomethanes by heating the content liquid during this period. The amount of trihalomethanes in the content liquid can be significantly reduced in an extremely short time, and chlorine in the content liquid is also reduced by the amount of trihalomethanes released. After that, the boiling operation is continued until the content liquid is boiled, and the content liquid after boiling is used.However, the amount of trihalo is reduced by the amount of the chlorine decreased by heating after this point. Less generation of Tan acids, sufficiently generated as trihalomethanes volatilization, it is possible to boil liquid contents while diverging.

The heating control means has a descaling mode,
When the content liquid is boiled by executing this, if this boiling is continued for a predetermined time, it is possible to further volatilize and diffuse the trihalomethanes and further reduce them.

If the descaling mode is set appropriately by operating the descaling setting and canceling means, or the setting can be canceled, the descaling mode can be executed according to the user's selection.

If the re-boiling setting means is provided and the control means re-boils the content liquid by operating the re-boiling setting means, the content liquid can be boiled and used at any time required by the user. Can be

[0019]

1 to 6 show an embodiment of an electric hot water storage container to which the present invention is applied.

As shown in FIG. 1, an inner container 2 is housed in an outer case 3 to form a body 1.

The upper end flange of the inner container 2 is received 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 7 made of synthetic resin is applied to the lower end of the outer case 3, and the bottom ring 7 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 7 are integrated with each other.

A bottom lid 10 is attached to the opening of the bottom ring 7 by fitting a plurality of claws provided on the bottom lid 10 and screwing at one location.

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

A bottom heater 8 is provided on the lower surface of the bottom of the inner container 2.
a and 8b are applied. This bottom heater 8a, 8
Reference numeral b denotes a water heater and a heat-retaining heater. For example, the wire bottom heaters 8a and 8b are alternately wound around an annular mica plate, sandwiched between the mica plates, and housed in a case.

A heat shield plate 32 is screwed to the bottom of the inner container 2 by using a metal fitting 31, and a presser 35 is sandwiched between the heat shield plate 32 and the back side of the bottom heaters 8a and 8b. Thereby, the bottom heaters 8a and 8b are pressed against the bottom surface of the bottom of the inner container 2. The pouring pump 11 is attached to a part of the heat shield plate 32.

In the central through holes of the bottom heaters 8a and 8b,
A temperature sensor 33 that detects the temperature of the content liquid is provided, and is thermally isolated from the bottom heaters 8a and 8b by the heat shield wall 34, and the temperature of the inner container 2 is accurately detected without the thermal influence of the bottom heaters 8a and 8b. I am able to do it.

A circuit housing box 40 is provided on the bottom ring 7 so as to open downward, and a circuit board 41 housed in the circuit housing box 40 is waterproof against water leakage from above.

Control circuit 4 mounted on this circuit board 41
Reference numeral 2 is a microcomputer 43 that receives output signals from the operation board 18 and detection signals from various sensors to control operation of boiling and heat retention, and display operation thereof and display control by timer setting. Is supposed to do.

At the upper end of the body 1, the body 1 formed by the shoulder member 4
A container lid 6 for covering the mouth portion 61 of the container is provided. The inner peripheral portion of the mouth edge of the mouth portion 61 is formed on the tapered surface 65, and the outer peripheral edge of the outer plate 64 of the vessel lid 6 is also formed on the tapered surface 65.

Due to these tapered surfaces 65, both the contact surfaces of the container lid 6 in the closed state are aligned with each other, and the outer surfaces of the shoulder member 4 and the container lid 6 are flush with each other at the contact boundary portion 67. Become. The body lid 6 is attached to the shoulder member 4 at the rear by a hinge pin 68.
It is pivotally attached so that it can be opened and closed. The vessel lid 6 is pivotally attached to a bearing 69 formed integrally with the shoulder member 4, and when the vessel lid 6 is opened, the hinge pin 68 is used to support the bearing 6.
It can be attached and detached from 9.

By attaching / detaching the hinge pin 68, the container lid 6 can be attached / detached, which facilitates cleaning of the inside of the container 1 and supply / drainage of the content liquid.

A lock member 71 is provided at the free end of the body lid 6 to advance and retreat the upper surface of the back plate 81 of the body lid 6 to lock the body lid 6 in the closed state.

The lock member 71 has a locking projection 72 integrally formed on the front end thereof, and a sliding contact surface 73a provided on the rear end 73 thereof.

The spring 76 presses and urges the lock member 71 so that the locking projection 72 at the tip end elastically engages with the engaging hole 70 formed in the shoulder member 4, and the body lid 6 is attached to the shoulder member 4. Keep closed.

A cam portion 79b of a lock release lever 79 having an operating portion 79a is in contact with the rear end portion 73 of the lock member 71. The lock member 71 is rotatably attached to a bearing portion in the body lid 6 by a shaft 78.

The lock release lever 79 is the lock member 7.
When 1 is advanced to the engagement position by the spring 76, the operation portion 79 a is inserted into the upper surface opening 80 of the body lid 6 at the body lid 6.
It is flush with the surface of.

On the lower surface of the back plate 81 of the vessel lid 6, the inner container 2
A metal inner lid 85 that closes the rear of the
It is screwed at 3. Outer periphery of inner lid 85 and back plate 81
A seal packing 84 facing the rim of the inner lid 85 is sandwiched between and, and when the body lid 6 is closed, the inner lid 85 contacts the rim of the inner container 2 with the seal packing 84, Close the inner container 2.

As shown in FIG. 3, a steam passage 87 is provided between the back plate 81 and the inner lid 85 to let steam generated in the inner container 2 escape to the outside.

The steam passage 87 has an opening 86 on the inner lid 85 toward the inner container 2 side, and an opening 52 to the outside on the rear side upper surface of the vessel lid 6.

A liquid reservoir 90 fitted from below through a seal member 88 is pressed by the back plate 81 into the opening 86.

The liquid reservoir 90 has an annular shape, and a valve chamber 91 accommodating a water stop valve 92 at the time of overturning which is closed when the container 1 is overturned.
And a first area 93 divided into several parts, and this first area 93
Forming a content liquid reservoir chamber consisting of a second region 94 around the.

Immediately downstream of the valve chamber 91, a reservoir 50 having a wide space reaching the upper portion of the vessel lid 6 is provided. In this pool portion 50, a downstream outlet 51 communicating with the opening 52 is oriented laterally and the passage cross-sectional area is reduced.

Various arrangements have been made with respect to the outlet 51 such that the shape of the reservoir 50 is widened in the front, rear, left and right directions of the body 1 and the upper surface side of the body lid 6. .

As a result, when the vessel body 1 falls forward or backward or leftward or rightward and the stop water valve 92 at the time of fall moves to the position indicated by the phantom line, the stop water valve 92 at the time of stop also stops the liquid content. When the content liquid is attempted to flow out through the vapor passage 87 without being blocked, the content liquid to be flowed out is stored in the reservoir 50, and the flow of the content liquid to the downstream side is suppressed or prevented until the content liquid overflows.

The first region 93 and the second region 94 of the liquid reservoir 90 prevent the content liquid from flowing out to the outside, and the container 1 is returned to a normal state before it flows out. You can give a sufficient margin.

When opening the body lid 6, if a finger is put into the upper surface opening 80 and the operating portion 79a is lifted, the lock release lever 79 rotates clockwise, and the lock release lever 79 is rotated.
The rear end portion 73 of the lock member 71 is pressed by the cam portion 79b.

As a result, the lock member 71 is pushed and retracts against the spring 76, so that the engagement between the engagement hole 70 and the locking projection 72 is released.

Further, when the operating portion 79a is moved upward, the unlocked body lid 6 is opened. The spring 76 presses the lock member 71 by a natural operation of releasing the hand from the operation portion 79a, and the locking projection 72 is projected from the free end portion of the body lid 6.

On the other hand, when the body lid 6 is closed, when the body lid 6 is rotated, a locking projection 72 is formed on the inner peripheral edge portion 62 of the shoulder member 4.
When is inserted, it is projected and locked by the pressing force of the spring 76.

In this closed state, the base lid 6 is locked by the inner lid 85 provided on the inner surface side. In this closed state, the mouth of the inner container 2 is closed by the inner lid 85 provided on the inner surface side of the vessel lid 6. At this time, the seal packing 84 seals between the inner lid 85 and the mouth of the inner container 2.

A pouring path 12 for pouring out the content liquid is connected to the bottom of the inner container 2. The pouring path 12 rises up to the inside of the beak-shaped protrusion 5 provided in the front portion of the shoulder member 4 in the space between the inner container 2 and the outer case 3.

The beak-shaped protrusion 5 protrudes from the shoulder member 4, and a passage cover 15 forming a part of the beak-shaped protrusion 5 is fitted in the downward opening. A lower cover 15a and a liquid injection guide 16 are integrally formed with the passage cover 15, and the discharge port 19a is covered with the outer surface of the body 1 and the discharge port 19a is exposed downward.

At the portion of the spout 12 below the inner container 2, the content liquid flowing into the spout 12 is discharged.
A pouring pump 11 for feeding to 9a is provided and is driven by a motor. Although not shown in the drawing, the rising portion of the pouring path 12 has the same liquid level as the inner container 2, so that the liquid amount is detected by using a capacitance or a photo sensor. A detector is provided.

The discharge port 19a is made of elastic silicon rubber, and an annular seal portion 20 is integrally formed in the middle of the discharge port 19a, and a protruding portion 19b is provided at the lower portion of the seal portion 20.

The discharge pipe 19 is connected to the connecting pipe 14, and when the passage cover 15 is attached to the beak-shaped protrusion 5, the protrusion 19b contacts the inner peripheral wall 16c of the liquid injection guide 16. Also, at the edge of the upper opening 16a of the liquid injection guide 16,
The seal portion 20 abuts and is firmly held while being pressed by a pressing force.

As a result, the upper opening 16a and the lower opening 16 of the liquid injection guide 16 which are the openings of the beak-shaped protrusion 5 are formed.
An annular gap G formed between b and the lower end of the discharge pipe 19, which is the spout, is sealed by the seal portion 20.

Further, the discharge pipe 19 is provided with a slit 19c in the length direction of the discharge pipe 19 at a part of the end edge of the lower end, and when the content liquid is discharged from the lower end, it is opened to the atmosphere at the upper end of the slit 19c. Therefore, it is possible to discharge as a quiet laminar flow without splash.

An operation panel 17 is provided on the upper surface of the beak-shaped protruding portion 5, and the operation panel 17 is as shown in FIG. 2, and in addition to the pouring operation key 102, the re-boiling / descaling removal setting key 104. , Timer setting key 105, pouring lock
A release key 106 and liquid amount display units 111 to 113 are provided.

The reboil / descaling removal setting key 104 and the pouring lock / release key 106 are set so that the setting mode is changed to a rotary type each time they are operated.

FIG. 3 shows a control circuit 42. As shown in the figure, the microcomputer 43 has electric / electronic components related to the various inputs and outputs as an A / D converter 301, a switch circuit 303, a drive circuit 304, and a display circuit 305. Are properly connected via.

The operation will be described below. FIG. 4 is a flowchart of the main routine showing the main operation control. When the power is turned on, the initial setting of step # 1 is first performed, and then the processing corresponding to various inputs is performed (step ##).
2).

Next, when the boiling process (step # 3) is called and the content liquid is below the predetermined temperature at which it is unreasonable or time-consuming to rise to the heat retention temperature in the heat retention mode, that is, water supply When the content liquid temperature is low at the initial stage or due to the replenishment of the content liquid, or when reboiling is set by the reboiling / scaling removal setting key 104, in a high capacity energization state by both bottom heaters 8a and 8b,
It controls to heat up to boiling quickly.

In this case, in the present embodiment, when the content liquid reaches the boiling temperature range when the content liquid temperature is lower than or equal to the boiling temperature range of the trihalomethanes that are volatile, the boiling operation is interrupted for a predetermined time. Then, the content liquid is kept in the boiling temperature range, and the boiling operation is continued until the content liquid is once boiled after a predetermined time has elapsed.

As a result, while the content liquid is kept in the boiling temperature range, the produced trihalomethanes are kept in the boiling temperature range while suppressing the production of trihalomethanes due to heating of the content liquid. Since it volatilizes and volatilizes vigorously, the amount of trihalomethanes in the content liquid can be greatly reduced in a relatively short time.
As the amount of trihalomethanes released, chlorine in the content liquid also decreases, so after the lapse of a predetermined time, the boiling operation is continued until the content liquid is once boiled, and the content liquid after boiling is used. By the subsequent heating, the amount of trihalomethanes produced is small due to the decrease in chlorine content, and the content liquid can be boiled while the produced trihalomethanes are sufficiently volatilized and diffused.

As a result, as shown by the characteristic line b in FIG. 7, the amount of total trihalomethanes in the content liquid is greatly reduced at the boiling point, as compared with the conventional case shown by the characteristic line a. The total amount of chlorine is also reduced.

Subsequently, the heat retention process (step # 4) is called, and after the initial boiling or re-boiling, the bottom heater 8a,
The energization is controlled so that the content liquid is maintained at a predetermined heat-retaining temperature in a low-capacity energizing state of only the heat-retaining bottom heater 8b.

Further, when the timer process (step # 5) is called and the timer is set by the timer setting key 105, the boiling operation disclosure time is delayed until the time required to boil the content liquid at the timer setting time. Delay control is performed so that the boiling operation starts from.

Next, when the descaling process (step # 6) is called and the reboiling / descaling removal setting key 104 is operated in the descaling mode, the initial state when the content liquid in step # 3 is equal to or lower than the predetermined temperature. The boiling operation is controlled to continue for a predetermined time.

However, this can also be performed in the case of the reboil operation. The boiling operation can be continued intermittently for a predetermined time.

The trihalomethanes further produced in the content liquid by the continuation of the boiling, the chlorine and the odor causing the production thereof can be added to the treatment at the initial boiling and further removed.

Next, the pump process (step # 7) is called, and the pouring pump 11 is operated by operating the pouring operation key 102.
To drive the pouring.

Finally, after the other processing (step # 8) is completed, the process returns to step # 2, and the above control is repeated thereafter.

FIG. 5 is a flow chart showing a specific example of the boiling process subroutine. When the content liquid is below a predetermined temperature 80 ° C, which is lower than the heat retention temperature 93 ° C by a predetermined width, such as when the power is turned on or when the content liquid is replenished, or during the heat retention mode, the reboil / descaling removal setting key 104 performs the reboil operation. When it is broken, it is boiled by the boiling operation, and this subroutine is finished.

However, at this time, unless the content liquid has a boiling point temperature range of 63 ° C. or lower, which is a low boiling point and volatile trihalomethane, the content liquid is boiled all at once by continuous boiling operation. However, when the temperature is 63 ° C. or lower, the boiling operation is performed until the content liquid reaches 63 ° C., and then the boiling interruption timer is started, and the content liquid is kept at 63 ° C. until the end (3 minutes in this embodiment). However, during this time, while suppressing the generation of trihalomethane in the content liquid, the volatilization and emission of the generated trihalomethane are promoted.

When the boiling suspension for a predetermined time is completed, the normal boiling operation is resumed and the content liquid is boiled.

When the re-boiling is set, it is considered unlikely that the content liquid is 63 ° C. or lower, and in this case, normal boiling operation can be immediately started.

FIG. 6 shows the initial boiling, heat retention, descaling,
It is a graph which shows an example of the temperature change of the content liquid in each control of reboiling.

[0079]

According to the present invention, when the content liquid reaches the boiling temperature range of the trihalomethanes during the execution of the initial boiling mode, the heating control means suspends the boiling operation for a predetermined time to bring the boiling temperature range into consideration. Since the content liquid is kept in the boiling point temperature range of the generated trihalomethanes while suppressing the generation of trihalomethanes due to heating of the content liquid during this time, The amount of trihalomethanes in the content liquid can be greatly reduced in a short time, and chlorine in the content liquid is also reduced by the amount of trihalomethanes released. The boiling operation is continued until the content liquid is boiled, and the content liquid after boiling is used, but depending on the heating after this point, the amount of trihalometa is reduced by the amount by which the chlorine is reduced. It is a hygienic product in which the amount of trihalomethanes generated is small, the content liquid can be boiled while volatilizing and releasing the generated trihalomethanes, and the total amount of trihalomethanes and chlorine after boiling in the content liquid is greatly reduced. Can be

The heating control means has a descaling mode,
When the content liquid is boiled by the execution of this, if this boiling is continued for a predetermined time, further volatilization and emission of trihalomethanes can be achieved to further reduce the odor, and the odor can also be removed.

If the descaling removal mode is set appropriately by operating the descaling removal setting / releasing means, or if the setting can be canceled, the descaling removal mode can be executed according to the user's selection, which is convenient for use. is there.

If the re-boiling setting means is provided and the control means re-boils the content liquid by operating it, the content liquid can be boiled and used at any time when the user needs it. Therefore, it is convenient to use, and the boiling at this time can be utilized to increase the chances of the above control.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view showing an operation panel section of FIG.

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

FIG. 4 is a flowchart showing a main routine of main operation control of the control circuit of FIG.

5 is a flow chart of a boiling process subroutine of FIG.

FIG. 6 is a graph showing an example of temperature change of the content liquid due to the processing of FIG.

FIG. 7 is a graph showing the relationship between the content liquid temperature and the residual amount of trihalomethane in comparison between the conventional case and the example of the present invention.

[Explanation of symbols]

 2 Inner container 8a, 8b Bottom heater 33 Temperature sensor 42 Control circuit 43 Microcomputer

Claims (4)

[Claims] 1. An electric hot water storage container having a heater for heating a content liquid and a control means for controlling energization of the heater, and having an initial boiling mode for boiling the content liquid, wherein the initial boiling mode is executed. On the way, when the content liquid reaches the boiling temperature of trihalomethanes having a low boiling point and volatility, the boiling operation is interrupted for a predetermined time and the content liquid is maintained in the boiling point temperature range during this period, and after the predetermined time elapses, the content liquid An electric hot water storage container provided with heating control means for continuing a boiling operation until it is boiled. 2. The electric hot water container according to claim 1, wherein the heating control means has a scaly removal mode for continuing the boiling for a predetermined time when the content liquid is boiled. 3. The descaling mode is set to descaling.
The electric hot water storage container according to any one of claims 1 and 2, wherein the electric hot water storage container is set by operating the releasing means, and the setting is released. 4. The reboil setting means is provided, and the heating control means has a reboil mode in which the content liquid is boiled again from the present time when the reboil setting means is operated.
The electric hot water storage container according to any one of 1.