JPH0637788Y2 - Electric hot water storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electric hot water storage container capable of boiling water.

(Prior 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, the electric hot water storage container stores tap water in most cases, keeps it warm at a predetermined temperature after boiling it, and if necessary, either keep it in that warm state or re-boil it before pouring it for use. There is.

The initial boiling that is first boiled and the reboiling that is boiled during the subsequent heat retention not only adapt the liquid temperature to the intended use, but also help sterilization and odor emission.

According to Japanese Utility Model Publication No. 63-40177 (conventional example 1), by heating for a predetermined time from the time of boiling water to a predetermined temperature, the content liquid is temporarily boiled without being affected by the amount of liquid, etc., and then kept warm. I have disclosed what I did. According to this, the sterilization due to boiling and the emission of odor are surely performed.

However, many chlorine compounds contained in tap water, particularly harmful substances such as trihalomethane, remain, and it is desirable to sufficiently remove them.

Japanese Examined Patent Publication No. 63-45811 (conventional example 2) is based on energization control by detecting the above temperature, and Japanese Utility Model Publication No. 52-57470 (conventional example 3) is based on heating for a predetermined time from the time of boiling to a predetermined temperature. Boil each inner container surely for a certain time,
It discloses that the temperature is kept after this.

According to these materials, trihalomethane and the like are easily released due to the continued boiling.

Further, the prior art example 2 also discloses that the content liquid can be reboiled by operating the switch during the heat retention. As a result, the boiling high-temperature content liquid can be poured out, and the chances of sterilization and removal of scaly due to boiling can be increased.

On the other hand, in Japanese Patent Laid-Open No. 63-171519 (Prior Art 4), the content liquid is once boiled, and then the boiling is continued for a predetermined time. Discloses that the temperature is kept at a temperature close to the boiling point. According to this, the evaporation of the content liquid is small and the descaling can be performed.

(Problems to be Solved by the Invention) However, in the conventional example 1, only the content liquid is surely boiled, so that the descaling cannot be sufficiently performed.

In addition, the conventional example 4 is inconvenient because the removal of the scaly is not sufficiently performed until the inside and outside time has passed relatively even after switching to the heat retention.

In the conventional examples 2 and 3, since the boiling of the content liquid is only sustained for a time, the content liquid with good water quality and the descaling are always removed even when the application and the user do not require the descaling. As a result, the boiling time, the power, and the disappearance of the content liquid due to evaporation are wasted.

It is also conceivable to remove as much chlorine as needed when it is necessary to eliminate this.

However, it is inconvenient to perform these operations every time the content liquid is boiled.

Further, when there are operating states of initial boiling for boiling the content liquid from a low temperature state and re-boiling for boiling the content liquid under heat retention, the number of boiling operations is doubled, which is further inconvenient. In particular, since the operation key for performing the descaling is separately provided, the configuration is complicated and the operation tends to be complicated.

Therefore, according to the present invention, whether or not the descaling is performed changes relatively frequently from time to time, but when descaling is performed,
Keep in mind that how much you do will not change much unless there is a special reason for a specific user in a specific area,
It is an object of the present invention to provide an electric hot water storage container which is convenient for such use, has a simple structure, and is easy to operate and can solve the above-mentioned problems of the related art.

(Means for Solving the Problems) In order to achieve the above objects, the present invention provides a heater for heating the content liquid, an initial boiling for boiling the content liquid, a heat retention for keeping the content liquid after boiling, and a heat retention. In an electric hot water storage container provided with an energization control unit that energizes the heater in each operation state of re-boiling to boil the content liquid therein, a descaling mode setting unit for continuing the boiling for a predetermined time, and an initial boiling and re-heating. It is provided with a descaling control means for executing the descaling mode only when the descaling mode is set by the descaling setting means at the time of boiling, and a display panel is provided on the front surface of the body to display the descaling display and Each display of the boiling display and the boiling key are provided, and each time the boiling key is operated, the boiling display and the descaling display are individually displayed one by one and continued for a predetermined time or longer. Is characterized in that has an operating mode setting means to be executed in the corresponding mode on the display has.

(Operation) In the configuration of the present invention, by the energization control of the heater by the energization control means, the initial boiling for boiling the content liquid, the heat retention for retaining the content liquid after boiling, and the re-boiling for re-boiling the content liquid under heat retention are performed. You can take action.

At the time of initial boiling and re-boiling, the descaling removal control means operates to execute the descaling mode only when the descaling removal mode is set by the descaling removal setting means. Therefore, the time and current for continuing the boiling and the disappearance due to the evaporation of the content liquid are not wasted.

In particular, only by operating one boiling key, each time the boiling key is operated, the re-boiling display and the descaling display are individually and sequentially displayed, and the mode corresponding to this display is executed. It is not necessary to use a plurality of operation keys for each mode to execute the mode, and the descaling mode can be executed only by operating a single boiling key, which simplifies the configuration. In the case of this kind of electric hot water storage container, since the effective display panel area is small, the operation keys can be reduced by effectively setting the display position of the boiling key. It can be used for both descaling and is easy to use.

(Embodiment) As shown in FIG. 1, the heater 1 is attached to the lower surface of the bottom of the inner container 2, and a heater driving circuit is provided by a circuit 91 (FIG. 2) including a micro computer (hereinafter referred to as a microcomputer) 66.
Through 92, energization is controlled between a boiling state and a heat retaining state so that the content liquid can be heated at a proper time and in a boiling state or an appropriate temperature to keep the temperature.

The inner container 2 is housed and held in the outer case 3 to form a body 4. The mouth portion 2a of the inner container 2 is connected to the upper end of the outer case 3 by a shoulder member 5 made of synthetic resin, and an outer lid 7 is pivotally attached to a rear hook-shaped bearing 9 of the shoulder member 5 by a shaft 6 so as to be openable, closable and detachable. ing. An inner lid 8 provided on the mouth 2a of the inner container 2 is attached to the lower surface of the outer lid 7, and is opened and closed integrally with the outer lid 7.

Inside the outer lid 7, a bellows pump 11 which is pushed by an upper surface pressing plate 10 of the outer lid 7 is provided, and the inner container 2 is provided through an air supply passage 13 provided between the inner lid 8 and the bellows pump bottom plate 12. Pressurized air is sent inside to pressurize the content liquid. The air supply passage 13 is provided with a steam vent passage 15 that leads to the upper surface of the outer lid 7 through a branch hole 14 so that steam generated during heat retention and boiling by the heater 1 is released to the outside to prevent abnormal pressure rise in the inner container 2. Has become.

The branch hole 14 is switched and closed with the air supply port 16 of the bottom plate 12 of the bellows pump by a valve 36 that is moved downwards in conjunction with the pressing operation of the bellows pump 11, so that pressurized air is discharged from the vapor discharge passage when the content liquid is pressurized. It does not happen that steam escapes to 15 or steam enters the bellows pump 11 when the hot water is stored.

A lead-out path 17 for guiding the pressurized content liquid to the upper outside of the inner container 2 is provided by connecting the base end to the bottom of the inner container 2, communicates with the inner container 2 and the upper end is open to the outside. As a result, the content liquid 42 in the inner container 2 always flows in and is kept at the same level. A synthetic resin elbow 20 is connected to the upper end of the lead-out path 17. The elbow 20 is connected to an inverted U-shaped tube 23 fixed to the back side of the beak-shaped portion 5a of the shoulder member 5 which extends to the one side like a beak. The inverted U-shaped tube 23 is an elbow
Immediately above the connection with 20 has a built-in water stop valve 25 at the time of fall,
The downward discharge port 19 of the tip of the inverted U-shaped pipe 23 is formed with a slit 26 on the front surface side thereof, which extends from the lower end to a position higher than the full water position of the inner container 2.

A pipe cover 27 surrounding the beak-shaped portion 5a is provided below the beak-shaped portion 5a of the body 4, and is fitted to the beak-shaped portion 5a and the outer case 3 of the body 4. At the bottom of the pipe cover 27, a liquid injection guide pipe 24 that receives the liquid discharged from the discharge port 19 of the inverted U-shaped pipe 23 in an open state to the atmosphere and flows out downward is detachably attached from below.

The slit 26 is also involved in the reception in the open state to the atmosphere, and reliably prevents the siphon, the splash phenomenon, and the spouting of the contents in the case of sudden pouring. The liquid injection guide tube 24 is removably fitted to the beak-shaped portion 5a of the shoulder member 5, accepts the liquid discharged from the discharge port 19 with a reasonably large diameter, and thereafter gently squeezes downward while squeezing appropriately. Let it flow down.

The air supply passage 13 is provided with a water stop valve 29 at the time of fall.

The rising part of the outlet path 17 for the content liquid is the liquid level detection part 17b,
It is made of an insulating material. Specifically, glass may be used, but a resin has a higher dielectric constant and is more likely to obtain a capacitance change, and it is possible to suppress the indeterminacy of the liquid level caused by the rise due to the surface tension around the liquid surface. The liquid level detector 17b is connected to the bottom of the inner container 2 via a straight connecting pipe 17c made of synthetic resin, a curved pipe 17a made of metal, an elbow 17d made of synthetic resin, and a connecting port 17e made of metal.

Here, an aluminum foil 41 is wound around the outer circumference of the liquid level detection unit 17b to form a first electrode, and the bent tube 17a electrically connected to the content liquid in the liquid level detection unit 17b serves as a second electrode.
Electrode 41 and the content liquid 42 in the liquid level detecting portion 17b communicating with the second electrode 17a form a capacitance sensor 201 facing each other through the insulating peripheral wall of the liquid level detecting portion 17b, and the size of the facing area is large. That is, it is possible to obtain an electrostatic capacity according to the liquid level height of the content liquid 42.

The difference in the capacitance depending on the liquid level is
As shown in the figure, the A / D converter 202 is connected to the microcomputer 66 of the control circuit 91.
It is configured to be input to the microcomputer 66 by connecting via. As a result, the microcomputer 66 judges the liquid level of the content liquid by the input corresponding to the difference in the electrostatic capacity, and in accordance with the judgment, the external display LED 42 ₁ , which is connected to the microcomputer 66 via the display circuit B, 42 ₂ ... 42 ₆ are driven to display the liquid level externally. In particular, when the liquid level has dropped to the extent that water supply is necessary to prevent empty cooking, the water supply display LED 80 is turned on to prompt water supply. In addition, for the determination of the liquid level, the relationship between the electrostatic capacity and the liquid level is tabulated at a necessary stage,
It is easy to determine based on this table. LED4
Each of the 2 _{1-42 6,} 80 are provided on the display panel 43 of Utsuwatai 4 front.

A display panel 203 is provided on the front surface of the pipe cover 27. This operation panel 203 has descaling, boiling,
Heat insulation display LEDs 204, 205, 206 and timer display LED 207
~ 209, timer setting key 210 and boiling key
211 is also provided.

In addition to the LEDs 42 _{1 to} 42 ₆ described above, 80, 204 to 20 are included in the microcomputer 66.
9 is also connected as the display circuit B, and the keys 210 and 211 are also connected to the microcomputer 66 as the switch operating section 212.

On the other hand, the heater 1 is connected to the heater drive circuit 92 by separately arranging the heat retaining heater 1a for boiling water and the heater 1b, and the relay of the control branch 91.
It is controlled by RY1 and RY2. Therefore, the contacts R-1 and R-2 of the relays RY1 and RY2 are connected to the heaters 1a and 1b as shown in the figure. The relays RY1 and RY2 are turned on and off by transistors TR1 and TR2 which are turned on and off by a signal from the microcomputer 66. Relay contact R-1 when relay RY1 turns on
Is turned on to turn on the heat retention heater 1a, and when the relay RY2 is turned on, the relay contact R-2 is turned on and boils to turn on the heater 1b. And by controlling both heaters 1a and 1b to be energized at the same time, the content liquid can be boiled until boiling.By controlling the energization of only the heat retention heater 1a, the content liquid is heated and kept warm so as to maintain the predetermined temperature before boiling. You can do it.

The energization in the boiling water state is detected by the temperature sensor 68 (Figs. 1 and 3). When the liquid temperature is lower than the holding temperature and the boiling water is required, the boiling key 21
This is performed when 1 is turned on, and when the temperature sensor 68 detects the boiling temperature, it is returned to the heat retention state.

The energization in the heat retention state energizes the heat retention heater 1a while the temperature sensor 68 detects a temperature equal to or lower than a predetermined heat retention temperature, and stops the current application to the heat retention heater 1a when the predetermined heat retention temperature is detected. The temperature sensor 68 for controlling these is also connected to the microcomputer via the A / D conversion circuit 202.
Connected to 66.

Further, under the control of the microcomputer 66, the heat insulation LED display 206 and the boiling LED are displayed every time the boiling key 211 is turned on in the operation panel 203.
The display 205 and the descaling LED display 204 are sequentially turned on independently and displayed, and the operation mode setting means is executed in a mode corresponding to the LED display in which this display continues for a predetermined time or longer. However, when the boiling key 211 is operated again, the operation mode setting can be changed in the same manner as described above.

Each time the timer key 210 is turned on on the operation panel 203, the timer display LEDs are sequentially lit in a rotary manner, and the time corresponding to the finally lit LED display is set by the timer. This timer setting time is, for example, to automatically start the boiling operation while the user is out or sleeping, so that the content liquid that has just boiled after the set time is obtained. .

In order to achieve this, the microcomputer 66 utilizes the liquid amount information from the sensor 201, the room temperature, or the information such as the temperature rising characteristic or the temperature lowering characteristic when the content liquid is heated or stopped heating. If you want to finish boiling the liquid in the set time, calculate how long before you need to start heating. A table created in advance may be used for this calculation.

The heating control of the content liquid will be specifically described with reference to the subroutine of FIG.

First, it is judged whether or not the descaling is selected by the boiling key 211 (step # 1). If not selected, the content liquid is below 80 ° C, or the boiling is selected by the boiling key 211 (steps # 2, #). 3) Only step # 5
Then, the boiling operation is performed. When the descaling is selected in step # 1, the descaling F is set to "1" (step # 4), and then the boiling operation in step # 5 is performed.

When it is determined in step # 6 that boiling has ended, the process proceeds to step # 7, and it is determined whether the descaling F is "1". When the boiling operation is started from step # 2 or # 3, since the descaling F is not "1", the process proceeds to step # 8, and after the boiling end operation and the buzzer BZ are notified of the boiling, the heat retaining operation is switched to. . Here, the boiling operation from step # 2 corresponds to initial boiling due to water supply or water replenishment, but step # 2
The boiling operation from No. 3 is from the heat retention operation that has gone through boiling and corresponds to reboil. The temperature change of the content liquid in these cases is shown in FIG. 4A (a).

If the descaling F is "1" in step # 7, step #
It moves to 10 and boiling is continued for 3 minutes. Therefore 4A
As shown in (b) of the figure, the continuous boiling state is obtained for the set time, and during that time, the emission of chlorine compounds and the like in the content liquid can be promoted. Exhibits so-called descaling effect.

When boiling continues for 3 minutes, the descaling F is reset to "0" in step # 11 and the process returns to step # 8.

It should be noted that chlorine compounds and the like emitted from the content liquid while boiling continues in the scaly removal operation mode are likely to remain in the upper space of the inner container 2 and adhere to the inner surface of the inner lid 8 or the like or are reduced to the content liquid 42. I have a hate.

Therefore, by providing an electromagnetic pump P as shown by imaginary lines in FIGS. 1 and 2 and blowing air into the upper space of the inner container 2 via the check valve CV, the above-mentioned fumes that are likely to stay behind are vaporized. You can aggressively drive to the outside through the passage 15.

A case where this is performed after the content liquid is boiled in various modes will be described with reference to the flowchart of FIG. The flowchart of this figure is an alternative to step # 8 and subsequent steps in FIG. 3, and after the boiling operation is completed in step # 8a, the electromagnetic pump P is turned on for a predetermined time (step # 8).
9a, # 10a). As a result, each time the content liquid is completely boiled, the electromagnetic pump P operates for a predetermined period of time to blow air into the upper space of the inner container 2 and expel the emitted substances to the outside.

When the electromagnetic pump P is operated for a predetermined time, the process proceeds to step # 11a to turn off the electromagnetic pump P, and the end of boiling is notified in step # 12a. Then, at step # 13a, it switches to the heat retention operation mode. It should be noted that the descaling function can be exerted only by positively expelling the exhaled matter by the pump together with the normal boiling operation or subsequent thereto.

In addition, it is preferable to perform the descaling operation as described above even with boiling water when the timer is set.In this case, even if the descaling operation is performed after boiling, the descaling operation is achieved within the target time and there is a delay for the descaling operation. Absent.

Further, the descaling operation can be performed at any time by operating a dedicated key.

6 and 7 show a case where the vapor escape passages 15 in the lid 7 are formed on three sides. Increasing the number of vapor escape passages 15 as in the present embodiment facilitates the escape of effluent that tends to stay in the upper space of the inner container 2 to the outside. The same effect can be obtained by forming the steam escape passages 15 wide instead of increasing the number. By the way, in any case, heat dissipation tends to increase during heat retention, but if you keep part of the steam escape passage 15 closed during boiling or other than a certain time after boiling, the problem of heat dissipation is solved. It The steam escape passage 15 can be opened and closed automatically by using a shape memory alloy or by a solenoid valve or the like.

FIG. 8 shows that by operating one of the boiling keys 211 for re-boiling provided on the display panel 203, each time the boiling key 211 is operated, the heat retention display, the re-boiling display and the descaling display are individually and sequentially performed. In this case, the operation of keeping warm, re-boiling, and removing descaling can be performed in a mode corresponding to the display continued for a predetermined time or longer while switching to the rotary type. Explaining based on the flowchart of the heating control subroutine shown in the figure, if the content liquid is lower than the heat retention temperature of 80 ° C. due to water supply or replenishment, it is determined in step # 21. As a result, the boiling operation mode is executed (step # 22), and the content liquid is heated to boiling. When it is determined that boiling has ended (step # 23), the process proceeds to the heat retention operation (step # 28). When the boiling key 211 is turned on during this heat retention, the process returns to step # 22 and the boiling operation mode is executed again. This is the so-called reboil operation. When the boiling key 211 is turned on in the execution state of the boiling operation mode, it is detected in step # 24, and the descaling operation mode of step # 25 is executed. However, when the end of the descaling operation mode is not detected, that is, when the boiling key 211 is turned on while the descaling operation mode is being executed (step # 27), the warm mode is returned to. (Step # 28).

As described above, descaling can be performed by continuing boiling for a certain period of time as needed.

However, it does not have the advantage of removing boiling water by keeping boiling for a necessary time when needed.

FIG. 9 makes this possible with a simple configuration and control. Note that the configuration shown in FIGS. 1 to 3 is used, and a description thereof will be omitted. Also, FIG. 6 and FIG.
The configuration shown in the figure can also be adopted.

Only the specific control shown in FIG. 9 will be described below.

Specifically, it shows a case where the descaling operation can be executed in two modes. As a result, the descaling treatment can be carried out to an appropriate degree according to the difference in water quality in each region, the intended use, and the preference of the user. If this is explained based on the flowchart of the heating control subroutine shown in the figure, if the content liquid is 80 ° C. or higher or if the boiling key 211 is not turned on (steps # 30a, # 30b), the process directly proceeds to step # 37a. The temperature is kept at 80 ℃.
Step # 31 if less than or boil key 211 is turned on
Move to. Here, it is judged whether either the descaling 1 or 2 is selected, or neither is selected (step # 31). If neither is selected, the process directly proceeds to step # 34, but if the descaling 1 is selected, the descaling 1F is set to "1" (step # 32) and the descaling 2 is selected again. Then, set the descaling 2F to "1" and then proceed to step # 34.

In step # 3, the boiling operation is performed. When the end of boiling is determined (step # 35), it is determined in the next step # 36 whether the descaling flag 1F or 2F is present. If there is none, the process proceeds to step # 37, and the boiling ending operation and the boiling notification are performed. So-called normal boiling.

If the descaling 1F or 2F is "1" in step # 36, the process proceeds to step # 38, and it is determined which flag is "1". If the descaling 1F is "1", the boiling operation is continued until 3 minutes have passed (steps # 39, # 40), the descaling operation is performed for 3 minutes, and the descaling 1F is reset to "0". Return to step # 37. If the descaling removal 2F is "1" in step # 38, the boiling operation is continued until 5 minutes have elapsed (steps # 42 and # 43), and the descaling removal 2F is performed after performing the descaling operation for 5 minutes. Reset to 0 "and return to step # 37.

FIG. 9A shows the temperature change state of the content liquid in each of the modes 1 and 2 for removing the descaling.

10 and 11 show the case where the descaling operation time can be freely set. Here, the maximum time that can be set is 10 minutes.

As shown in FIG. 10, the operation panel 203 is provided with a reboil key 211 for reboiling, a descaling key 311 for setting a descaling mode and its time, and a 7-segment set time display section. 312 is also provided. As for the time setting of the descaling, while the descaling key 311 is being pressed, the display on the display unit 312 is rotary up from 1 minute to 10 minutes, and when the key 311 is released, the display at that time stops and this stop time When the time exceeds the predetermined time, the displayed time is set as the descaling operation time.

Explaining below with reference to the flowchart of the calcination time subroutine of FIG. 11, it is first determined whether the calcination removal key 311 is turned on (step # 51). When the key 311 is turned on, the descaling time T is displayed and set (step # 52), and when the reboil key 211 is turned on in the next step # 53, the process returns to step # 51 and the operation is performed until then. Yes, but step # 54
Then, the descaling F is set to "1" to set the descaling operation mode, and the boiling operation is started (step # 55).

If the key 311 is not turned on in step # 51, the process directly returns to exit from the descaling subroutine.

When it is determined in step # 56 that boiling has ended, step # 57
Then, it is determined whether the descaling F is "1". Where “1”
If not, it returns.

If the descaling F is "1", the process proceeds to steps # 59 and # 60 and the boiling is continued until the set time T elapses. That is, the descaling operation is performed for the set time T only. When this is completed, the descaling F is reset to "0" and the heat retention operation is started (steps # 61, # 62) and the process returns.
The temperature change of the content liquid in this case is shown in FIG. 11A.

Fig. 12 and Fig. 13 skillfully utilize two beaters used for boiling water and keeping heat, and achieve the continuation of boiling for removing scaly with the minimum required amount of heat while ensuring a high-speed start-up during boiling. I am trying to do it.

As a result, the heat effect on the resin portion of the lid 7 can be prevented from becoming excessive.

Specifically, in the heater drive circuit 92, as shown in FIG. 12, the heat retention heater 1a is set to 60 W and the hot water heater 1b is set to 740 W.

Then, the boiling operation is heated in the state of 800 W using both the heaters 1a and 1b, and the heater 1b is used to continue the boiling of the descaling operation.
Only the heat of 740W is used. In the heat retention operation, heating is performed in the state of 60 W only by the heat retention heater 1a.

This will be described based on the flowchart of the heating control subroutine shown in FIG.

Depending on whether the content liquid is less than 80 ° C or the reboil key 21 is turned on (steps # 71, # 72), heat retention and water heater
Turn on 1a and 1b and heat at 800W. As a result, the temperature of the content liquid is high and the rising temperature reaches boiling in a short time. If this is determined (step # 74), it is determined in the next step # 75 whether or not the descaling key 311 is turned on. If it is not turned on, the process proceeds to step # 79 as it is, and the heating operation is performed by switching to 60 W heating by only the heat insulating heater 1a. When the descaling key 311 is turned on, the timer for descaling operation is set to, for example, 3 minutes according to the initial setting or the time setting (step # 76), and the heat is kept until the timer ends in the subsequent steps # 77 and # 78. The heater 1a is turned off, and the heater 1b is heated to heat 740 W with only the heater 1b turned on. As a result, the descaling operation for 3 minutes is performed, and when this is completed, the heat retaining operation of step # 79 is started.

The change of the content liquid temperature in the case of this descaling operation is shown in FIG. 13A.

(Effects of the Invention) With the configuration of the present invention, by the energization control of the heater by the energization control means, initial boiling for boiling the content liquid, heat retention for retaining the content liquid after boiling, reboiling for re-boiling the content liquid during heat retention Each operation of can be performed.

At the time of initial boiling and re-boiling, the descaling removal control means operates to execute the descaling mode only when the descaling removal mode is set by the descaling removal setting means. Therefore, the time and current for continuing the boiling and the disappearance due to the evaporation of the content liquid are not wasted.

In particular, only by operating one boiling key, each time the boiling key is operated, the re-boiling display and the descaling display are individually and sequentially displayed, and the mode corresponding to this display is executed. It is not necessary to use a plurality of operation keys for each mode to execute the mode, and the descaling mode can be executed only by operating a single boiling key, which simplifies the configuration. In the case of this kind of electric hot water storage container, since the effective display panel area is small, the above-mentioned operation keys can be reduced so that the display position of the boiling key can be effectively set. It can be used for both descaling and is easy to use.

[Brief description of drawings]

1 is a longitudinal sectional view, FIG. 2 is a control circuit diagram, FIG. 3 is a perspective view of an operation panel, FIG. 4 is a flowchart of a heating control subroutine in each mode, and FIG. 4A is a case of normal boiling and calcination. A graph showing the temperature change of the content liquid in the case of removal,
FIG. 5 is a partial flowchart of a heating control subroutine of a modified example, FIGS. 6 and 7 are partial perspective views and an overall plan view, FIG. 8 is a flowchart of a heating control subroutine, and FIG. 9 is heating. Flow chart of control subroutine,
FIG. 9A is a graph showing the temperature change of the content liquid in each mode of descaling 1 and 2, and FIG. 10 is a perspective view of the operation panel.
Figure 11 is a flowchart of the descaling subroutine, 11th
FIG. A is a graph showing the temperature change of the content liquid in the descaling mode, FIG. 12 is a partial control circuit diagram, FIG. 13 is a flowchart of the heating control subroutine, and FIG. 13A is a diagram of the content liquid in the descaling mode. Temperature change and heater W in each heating state
It is a graph which shows. 1a …… Heat retention heater 1b …… Boiler heater 2 …… Inner container 4 …… Body 7 …… Outer lid 66 …… Microcomputer 68 …… Temperature sensor 91 …… Control circuit 203 …… Operation panel 204 …… Spot removal display 205 …… Boiling display 211 …… Boiling key

Claims (1)

[Scope of utility model registration request] 1. A heater for heating a content liquid, an initial boiling for boiling the content liquid, a heat retention for retaining the content liquid after boiling, and a re-boiling operation for boiling the content liquid under heat. In an electric hot water storage container having an energization control means for controlling, a descaling mode setting means for maintaining the boiling for a predetermined time, and only when descaling mode is set by the descaling removal setting means during initial boiling and reboiling, It is equipped with a descaling control means for executing the descaling mode, a display panel is provided on the front of the body, and each descaling display and boiling display and a boiling key are provided on this display panel, and each time the boiling key is operated. , A boiling display and a descaling display are individually displayed one after another, and the operation mode setting means for executing in a mode corresponding to the display continued for a predetermined time or longer is provided. An electric hot water storage container characterized by the above.