JPH0832250B2 - 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 it is considered that chlorine is sterilized and remains at the tap.

For this reason, a smell may remain even after boiling. In addition, it is difficult to remove trihalomethanes, which are toxic chlorine compounds.

[0005] As a means for dealing with this, the actual Kaihei 3-34
Japanese Patent Laid-Open No. 430 discloses a device in which a chlorine removal mode is provided 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.

[0006]

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. 9, 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 the temperature of the content liquid, and the amount of trihalomethane produced exceeds the volatilization amount. Be done.

Therefore, if the boiling state of the content liquid is simply continued to diverge the trihalomethanes as in the conventional chlorine removal mode disclosed in the above publication, the trihalomethanes cannot be effectively removed, The boiling operation is continued for a long time to completely remove it.
However, if the boiling operation is continued for a long time, a large amount of steam is generated, which may deteriorate or wet the area around the electric hot water storage container, and may adversely affect the room in which the electric hot water storage container is used.

On the other hand, it is also known that the removal of chlorine is carried out by a filter medium such as activated carbon, which solves the above problems. However, since the filter medium has a limited life, it needs to be replaced regularly, which is troublesome and expensive. In addition, since conditions for chlorinated odors such as regions, seasons, and individual differences are different, it is desirable to be able to select the degree of scaly removal, but it is difficult to satisfy this with a filter medium.

In order to solve these problems, the inventors of the present invention have conducted various experiments and studied, and as a result, as shown in FIG. 10, there is a difference between the temperature rise when boiling the content liquid and the residual chlorine. It was found that there is a relationship.

[0012] Regarding this, even if the heater capacity is increased and boiling is accelerated, residual chlorine is not completely removed, so that the duration of boiling becomes long, which is a problem. When the heater capacity is reduced, the boiling is slow, but residual chlorine is completely removed at the time of boiling.

Therefore, when attention is paid to the tendency toward descaling, it is appropriate to slow the rising rate of boiling at the initial boiling of the content liquid by a heating capacity lower than usual. On the other hand, when the boiling operation is continued after boiling for 1 minute, 3 minutes, and 5 minutes, the residual chlorine removal rate is 80%, 90%, and 97%, which are almost proportional to the duration of the boiling operation. Thus, it is possible to surely remove the chlorine and the smell of chlorine.

After boiling, even if the boiling operation is not continued, if the content liquid is kept in a boiling state or a state close to this, it is possible to sufficiently remove the chyle and the odor of chyle. It was also found that the problem caused by the occurrence did not occur.

An object of the present invention is to provide an electric hot water storage container capable of solving the above-mentioned problems of the related art based on such knowledge.

[0016]

In order to achieve the above-mentioned object, the invention of claim 1 has a heater for heating the content liquid and a control means for energizing and controlling the heater. In an electric hot water storage container having an initial boiling mode for boiling, in order to execute the initial boiling mode, a first descaling mode for boiling the content liquid, and after the content liquid has boiled, a boiling operation, a heat retaining operation, The present invention is characterized in that a heating control means having a second descaling mode in which the boiling operation is repeated a required number of times for a required number of times is provided.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, there is further provided operating means for setting the second descaling mode and canceling this setting.

According to a third aspect of the present invention, there is provided an electric hot water storage container having a heater for heating the content liquid and a control means for controlling energization of the heater, and having an initial boiling mode for boiling the content liquid. To execute the boiling mode, a heating control means having a descaling mode for boiling the content liquid is provided, the boiling operation is interrupted for a predetermined time during the boiling operation in the descaling mode, and the boiling point is low during the suspension of the boiling operation. It is characterized by having a heating mode in which the boiling temperature of the volatile trihalomethanes is maintained and the boiling operation is continued until the content liquid is boiled after a lapse of a predetermined time.

According to a fourth aspect of the present invention, there is provided an electric hot water storage container having a heater for heating the content liquid and a control means for controlling energization of the heater, and having an initial boiling mode for boiling the content liquid. To execute the boiling mode, a heating control means having a descaling mode for boiling the content liquid is provided, and the heating control means heats the content liquid by a predetermined temperature width after the content liquid reaches a predetermined temperature. The heating capacity is increased when the required heating time is lower than the theoretical value, and conversely, when the heating time is higher than the theoretical value, the heating capacity is decreased.

[0020]

In the above-mentioned structure of the invention of claim 1, in order to execute the initial boiling mode, the heating control means has the first descaling mode for boiling the content liquid, whereby the content liquid takes a long time. As it reaches a boiling state, trihalomethanes with low boiling point and volatility are actively liberated in the low temperature region while suppressing their formation, and this is slowly released to the outside with sufficient time for boiling to take a sufficient time to boil. And after the content liquid of the heating control means has boiled,
In the second descaling mode in which the boiling operation, the heat retaining operation, and the boiling operation are repeated for each required time for the required number of times, the content liquid is repeatedly boiled intermittently with the heat retaining operation intervening, and during the heat retaining operation also during the boiling operation. The temperature does not drop much due to residual heat,
The chlorine and chlorine smell can be actively emitted without observing the generation of a large amount of high-temperature steam as in the case of continuing the boiling operation and without wasteful heating.

According to the above configuration of the invention of claim 2,
In the invention of claim 1, further, if the second descaling mode is set by the operation of the special operating means or the operation of the releasing means, or if this setting is released, each of the first and second Achieving sufficient descaling time by the kalky mode, omitting the second descaling mode unless necessary, ending the initial boiling without spending a long time, and moving directly to the normal heat retention mode. , You can freely choose.

In the above configuration of the present invention as claimed in claims 3 and 4, the initial boiling mode has a descaling mode in which the content liquid is boiled, so that the content liquid reaches the boiling state over a long period of time. Therefore, trihalomethane, which has low boiling point and is volatile, can be liberated actively in a low temperature range while suppressing its generation, and it can take sufficient time until boiling to be sufficiently emitted to the outside together with the odor of chlorine. Furthermore, in the invention of claim 3, in particular, during the boiling operation in the descaling mode, the boiling operation is interrupted for a predetermined time, and the boiling temperature of trihalomethanes having low boiling point volatility is maintained during the interruption of the boiling operation. By the heating mode that continues the boiling operation until the content liquid is boiled after the elapse of a predetermined time, it is possible to prevent the content liquid from rising in temperature and a large amount of trihalomethane, which hinders the removal of chlorine. While stopping, by maintaining the boiling point temperature range at the time of this interruption, the production of trihalomethanes is suppressed, and the generated trihalomethanes are kept in the boiling point temperature range by the content liquid. Since it volatilizes and diffuses actively, it is possible to maximize the removal rate of trihalomethanes in the content liquid.

Further, in particular, in order to slow the rising speed of boiling of the content liquid with a heating capacity lower than usual, the content liquid reaches a predetermined temperature at which the temperature rising state is stable and a predetermined transition is made. When the temperature rise time required to raise the temperature range is lower than the theoretical value, the heating capacity is increased, and when it is high, the heating capacity is decreased so that the temperature rise rate is as set. Since the rising speed according to the set theoretical value can be accurately obtained regardless of changes in other conditions, ideal descaling can be achieved.

[0024]

1 to 6 show a first 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 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.

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.

Under the bottom of the inner container 2, a heat shield plate 32 is screwed using a metal fitting 31, and a presser 35 is sandwiched between this 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 is formed.
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.

By these tapered surfaces 65, both the contact surfaces of the body lid 6 in the closed state are aligned with each other, and the outer surfaces of the shoulder member 4 and the body 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.

At the free end of the body lid 6, there is provided a lock member 71 for advancing and retracting the upper surface of the back plate 81 of the body lid 6 to lock the body lid 6 in the closed state.

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

The spring 76 presses and urges the lock member 71 to elastically engage the locking projection 72 at the front end with the engagement hole 70 formed in the shoulder member 4, and the body lid 6 is fixed 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.

This 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 upper surface on the rear side of the vessel lid 6.

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

This liquid storage body 90 is annular and has a valve chamber 91 which accommodates a water stop valve 92 at the time of overturning which is closed when the vessel 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 measures have been taken with respect to the outflow port 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 water stop valve 92 at the time of the fall moves to the position shown by the phantom line when the body 1 falls to the front or rear or the left or right, the liquid content is stopped by the water stop valve 92 at the time of the fall. 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.

Further, the first region 93 and the second region 94 of the liquid reservoir 90 suppress the outflow of the content liquid to the outside, and it is necessary to return the container 1 to a normal state before the outflow. You can give a sufficient margin.

When the body lid 6 is opened, when 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 pouring path 12 below the inner container 2, the content liquid flowing into the pouring path 12 is discharged from the outlet 1.
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 silicone rubber. An annular seal portion 20 is integrally formed at a middle portion of the discharge port 19a, and a projecting portion 19b is provided at the lower portion of the seal portion 20.

The discharge pipe 19 is connected to the connection 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 protrusion 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 electric and electronic parts relating to the various inputs and outputs are A / D converter 301, switch circuit 303, drive circuit 304, display circuit 305 in the microcomputer 43. 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,
Control to heat to boiling.

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.

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 for boiling 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 descaling / descaling setting key 104 is set to the descaling mode, step # 6
The initial boiling operation when the content liquid in 3 is below a predetermined temperature,
Separately from the above, the descaling mode set in the control circuit is executed.

In this descaling mode, the first descaling mode is set in which the energizing capacity of the heater in the normal initial boiling mode, that is, the heating capacity is set lower, and the rising speed of boiling is slowed down. After the liquid reaches a predetermined temperature, the heating capacity is increased when the temperature rising time required to raise the content liquid by a predetermined temperature width is lower than the theoretical value, and conversely, when the temperature is higher, the heating capacity is decreased. The heating is controlled like this.

As a result, in executing the initial boiling mode, the heating control means has the first descaling mode in which the heating capacity is made lower than usual and the rising speed of boiling is slowed, whereby the content liquid is Since the temperature rise is slower than usual and it takes a long time to reach the boiling state, trihalomethanes, etc. with low boiling point and volatility are actively liberated in the low temperature region while suppressing their production, and this is sufficient for boiling. For a long time, it can be fully emitted to the outside along with the odor of chlorine. However, in the first descaling mode, the rising speed up to boiling does not have to be particularly slowed.

Further, since the rising speed of boiling of the content liquid is slowed by a heating capacity lower than usual, the temperature of the content liquid reaches a predetermined temperature at which the temperature rise is stable and the temperature is raised by a predetermined temperature range of transition. The heating capacity is increased when the required heating time is lower than the theoretical value, and the heating capacity is decreased when the heating time is higher than the theoretical value to keep the heating rate at the set value, regardless of changes in the environment or other conditions. Since the rising speed exactly according to the set theoretical value can be accurately obtained, ideal descaling can be achieved.

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 concrete example of the subroutine of the descaling process.

The basic current carrying capacity of the heater in the first descaling mode is set to 600 W and the initial boiling in the normal mode is set to 9
Lower than 05W.

As a result, the rising speed of boiling in the descaling mode shown by the solid line is slower than the rising speed of initial boiling in the normal mode shown by the broken line in FIG.

When the descaling mode is executed by the timer control using the time while sleeping or going out, there is no adverse effect of the boiling delay control.

Particularly in this embodiment, since the amount of the content liquid has a large effect on the boiling rate due to the low heating capacity of the heater, the control is performed in consideration of the amount of the content liquid.

Specifically, a predetermined intermediate temperature, for example, 40
The degree of temperature rise and the amount of water for a predetermined unit time from when the temperature reaches ℃ are determined, and the energizing capacity of the heater corresponding to the amount of water is set as 600 W ± α from the data obtained by experiments in advance.

Next, the time required for the content liquid to rise in temperature by 10 ° C. is measured, and if it is later than the theoretical value, the heating capacity is increased by a predetermined amount, and if it is early, the heating capacity is decreased by a predetermined amount. As a result, the set ideal temperature rise is achieved.

FIG. 7 shows a second embodiment of the present invention, in which the content liquid has a low boiling point and the boiling point of volatile trihalomethane during the boiling operation in the first descaling mode in which the current-carrying capacity is lower than the normal energizing capacity. When the temperature reaches 62 ° C., the content liquid is kept at 62 ° C. for a predetermined time set by the timer. During this period, the volatilization and emission of the generated trihalomethane are promoted while suppressing the generation of trihalomethane in the content liquid.

As a result, in addition to the case of the descaling mode in the case of the above-mentioned embodiment, while the content liquid is kept in the boiling temperature range, the generated trihalomethanes are suppressed while suppressing the generation of trihalomethanes due to the heating of the content liquid. Since the contents liquid is volatilized and released actively by keeping the contents liquid in the boiling point temperature range thereof, the production amount of trihalomethanes in the contents liquid is shown in the characteristic line b of FIG. 9 in a relatively short time. It is possible to significantly reduce the amount of trihalomethanes, and chlorine in the content liquid is also reduced by the amount of trihalomethanes released, so after the lapse of a predetermined time, the boiling operation is continued until the content liquid is boiled. Although the content liquid is used, the amount of trihalomethanes produced by the heating after this time is small due to the decrease in chlorine, and the trihalomethanes produced are sufficiently vaporized. You can boil the liquid contents while diverging.

In the case of the present embodiment, taking into account the interruption time of the boiling operation, as shown by the alternate long and short dash line in FIG. It is a little faster than the case so that the boiling end times are the same.

However, when there is a time margin, such as in the descaling mode when the timer is set, it is not necessary to increase the boiling rising speed. Therefore, the rising speed of boiling of the content liquid can be switched depending on whether the timer is being set.

FIG. 8 shows a third embodiment of the present invention. After the first descaling mode in which the content liquid is only boiled in the normal initial boiling mode, the boiling operation is carried out for 1 minute and the heat retaining operation is carried out. The second descaling mode is sequentially performed for 1 minute or 2 minutes, the boiling operation for 1 minute or 2 minutes.

In this case, in addition to the effect of removing the scaly in the first embodiment by the first scaly removing mode, the content liquid is repeatedly boiled intermittently in the second scaly removing mode with a heat retaining operation. In addition, the temperature does not drop much due to the residual heat during the boiling operation even during the warming operation, and the bleaching and odors can be actively emitted without seeing a large amount of high-temperature steam generated as in the case where the boiling operation is continued. It is possible to prevent the surroundings of the electric hot water storage container from being deteriorated or wetted due to the generation of a large amount of high-temperature steam, and to prevent the generated steam from affecting the surrounding environment.

Also in the case of this embodiment, it can be executed in combination with various descaling modes applied to each of the above-mentioned embodiments, and each operation time and repetition of the boiling operation after the boiling and the heat retaining operation are repeated. The number of times is arbitrary. It is also possible to select and execute various combinations of these. Therefore, it is possible to achieve descaling according to the region, season, individual difference, and the like.

However, in order to selectively set a plurality of descaling modes, the reboiling / descaling key shown in the first embodiment is shared, and the reboiling mode and the plurality of descaling modes are set to the rotary mode. It is possible to switch and set the formula. However, the present invention is not limited to this, and a plurality of descaling keys can be provided and used properly.

On the other hand, omitting the descaling saves time and power, but it may include the case where the first descaling mode is the same as the initial boiling. Therefore, the first descaling mode is always performed and the second descaling mode is used. Only the descaling mode can be set or released as necessary by operating a key as an operating means.

Moreover, when the descaling is achieved by controlling the energization of the heater as in each of the above-described embodiments, the descaling means and functions have no life, and the problem of replacement due to the life such as in the case of using the filter material is solved.

[0094]

According to the first aspect of the present invention, the heating control means has the first descaling mode for boiling the content liquid to execute the initial boiling mode, whereby the content liquid takes a long time. Since it reaches a boiling state, trihalomethanes with low boiling point and volatility are actively liberated in the low temperature region while suppressing their formation, and it takes a sufficient time to boil, and it is sufficiently discharged to the outside together with the odor of chlorine. Can be exhaled, and after the content liquid of the heating control means has boiled,
In the second descaling mode in which the boiling operation, the heat retaining operation, and the boiling operation are repeated for each required time for the required number of times, the content liquid is repeatedly boiled intermittently with the heat retaining operation intervening, and during the heat retaining operation also during the boiling operation. The temperature does not drop much due to residual heat,
The chlorine and chlorine smell can be actively emitted without observing the generation of a large amount of high-temperature steam as in the case of continuing the boiling operation and without wasteful heating.

According to the invention of claim 2, in the invention of claim 1, the second descaling mode is further set by the operation of the operation means, or this setting is canceled, if necessary. To achieve sufficient descaling, and if necessary, omit the second descaling mode to end boiling without spending a long time and shift to normal heat retention mode. You can select it.

According to the present invention of claims 3 and 4, in order to execute the initial boiling mode, the heating control means has a descaling mode in which the content liquid is boiled, whereby the content liquid is boiled for a long time. Since it reaches a state, trihalomethanes with low boiling point and volatility are actively liberated in the low temperature region while suppressing their production, and it takes sufficient time to boil and is sufficiently emitted to the outside with the odor of khaki. Further, in the invention of claim 3, in particular, during the boiling operation in the descaling mode, the boiling operation is interrupted for a predetermined time, and during the interruption of the boiling operation, the boiling point temperature of trihalomethanes having low boiling point volatility is increased. The heating mode keeps the temperature constant and continues boiling until the content liquid is boiled after the lapse of a predetermined time. While preventing the that, by so as to maintain the boiling point temperature range during this interruption,
It suppresses the production of trihalomethanes, and because the produced trihalomethanes are volatilized and volatilized actively because the content liquid is kept in the boiling point temperature range, the removal rate of trihalomethanes in the content liquid is maximized. Can be improved.

According to the fourth aspect of the present invention, in particular, in order to slow the rising rate of boiling of the content liquid with a heating capacity lower than usual, a predetermined temperature at which the temperature of the content liquid reaches a stable temperature is reached and a predetermined transition is reached. When the temperature rise time required to raise the temperature range is lower than the theoretical value, the heating capacity is increased, and when it is high, the heating capacity is decreased so that the temperature rise rate is as set. Since the rising speed according to the set theoretical value can be accurately obtained regardless of changes in other conditions, ideal descaling can be achieved.

[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 flowchart of a descaling process subroutine of FIG.

6 is an example of a temperature change of the content liquid due to the process of FIG.
It is a graph which shows together with the case of a normal mode and a 2nd Example.

FIG. 7 is a flowchart showing a characteristic part of a descaling subroutine showing a second embodiment of the present invention.

FIG. 8 is a flow chart showing a descaling subroutine showing a third embodiment of the present invention.

FIG. 9 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.

FIG. 10 is a graph showing the relationship between the current-carrying capacity of the heater and the residual chlorine removal rate.

[Explanation of symbols]

 2 Inner container 8a, 8b Bottom heater 33 Temperature sensor 42 Control circuit 43 Microcomputer 104 Re-boiling / descaling key

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. In addition, boil the content liquid
The first descaling mode, which is
Repeat the rising, warming, and boiling operations by the required number of times for each required time.
An electric hot water storage container provided with heating control means having a second descaling mode for returning . 2. A second descaling mode is set, and
The electric hot water storage container according to claim 1 , further comprising operation means for canceling this setting . 3. A heater for heating a content liquid, and this heater
And has a control means for controlling energization, and boil the content liquid.
In an electric hot water storage container that has an initial boiling mode, the content liquid is boiled to execute the initial boiling mode.
A heating control means having a descaling mode
During the boiling operation in the removal mode, the boiling operation is
Discontinue the boiling operation during the interruption of the boiling point.
After maintaining the boiling point of the rehalomethanes,
Heating mode that continues boiling until the content liquid is boiled
An electric hot water storage container having: 4. A heater for heating a content liquid, and this heater
And has a control means for controlling energization, and boil the content liquid.
In an electric hot water storage container that has an initial boiling mode, the content liquid is boiled to execute the initial boiling mode.
Heating control means with a descaling mode
After the content liquid reaches a predetermined temperature, the control means
The temperature rise time required to raise the temperature by the constant temperature range is less than the theoretical value.
When it is low, the heating capacity is increased, and when it is high, the heating capacity is increased.
An electric hot water storage container characterized by reducing the amount.