JPH0740339Y2 - 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, and more particularly to an electric hot water storage container that is capable of automatically obtaining hot water of a predetermined temperature at a scheduled time.

(Prior Art) In this kind of conventional electric hot water storage container, a scheduled time is set by a timer, and when the timer is turned off, the heater is energized to heat the content liquid to obtain a boiling state, and then a predetermined state is set. It is designed to be kept warm (Fig. 8).

(Problems to be solved by the invention) In the above-mentioned conventional method, after the set time set by the timer elapses, the content liquid is heated to a boiling point and then boiled to the boiling point. Will be greatly delayed from the scheduled time set by. This delay can be dealt with by actively shifting the set time from the actual time when hot water of a predetermined temperature is desired, based on experience and correction data. However, the desired time cannot be directly set, and since the difference between the time when the hot water of the predetermined temperature is obtained and the predetermined time remains the same, the user is confused. Further, in order to raise the temperature of the content liquid to a predetermined temperature or to cool the content liquid to a predetermined temperature after boiling, there is a large change depending on the liquid amount. The time to reach the temperature will also vary greatly, and in order to obtain hot water of a predetermined temperature at the time when the set time elapses for any amount of liquid, it is necessary to always heat from an early time corresponding to the case of the maximum liquid amount,
If the amount of liquid is small, the heating time is unnecessarily lengthened accordingly.

Therefore, the present invention provides an electric hot water storage container in which hot water of a predetermined temperature can boil the content liquid at a set time without being affected by the difference in the amount of the content liquid and shift to a predetermined heat retention state after the boiling. That is the purpose.

(Means for Solving the Problem) A first electric hot water storage container according to the present invention comprises a heater for heating a content liquid, an energization control means for energizing the heater to control a boiling state, a boiling state, and a predetermined heat retaining state. Time setting means, a timer for measuring the time after the time is set by the time setting means, a liquid amount determination means for heating the content liquid and determining the liquid amount of the content liquid by the temperature rising characteristic, and after starting the time measurement by the timer, Before the time set by the time setting means elapses, the water boiling operation start means for starting the water heating and energization by the power supply control means and the liquid amount by the liquid amount detection means are discriminated, and the liquid is discriminated according to the discrimination result of the liquid volume And a boiling operation ending means for terminating the boiling by heating and boiling the content liquid before the time set by the time setting means elapses It is an feature.

The second electric hot water storage container of the present invention comprises a heater for heating the content liquid, an energization control means for energizing and controlling the heater to a boiling state and a boiling and predetermined heat retaining state, the time setting means, and the time setting. The amount of the content liquid is detected by using the content liquid discharge path that rises upward from the connection between the timer that measures the time after setting the time by the means and the bottom of the body of the electric hot water storage container. After the liquid amount detecting means, the timer starts counting the time, and before the time set by the time setting means elapses, the boiling control operation starting means for starting the electric heating and energizing by the energizing control means, and the liquid amount by the liquid amount detecting means In accordance with the result of the determination of the liquid amount, the content liquid is heated and boiled by boiling before the set time by the time setting means, and after this boiling, the liquid is moved to a predetermined heat retention state to end the boiling. And a means for ending the boiling water operation.

(Operation) In the above-described configuration of the first electric hot water storage container of the present invention, the amount of the content liquid is adjusted by the temperature rising characteristic when the content liquid is heated, even though the hot water after boiling is obtained at the set time. It is possible to determine, start boiling water before the set time, boil the content liquid, and shift to a predetermined heat retention state after this boiling, so the set time is reached by the timer despite the difference in the liquid volume etc. At this point, deodorization and calcination of the content liquid due to boiling,
It is possible to remove trihalomethanes and other bacteria, and in combination with it, it is possible to obtain a content liquid having a desired heat retention temperature set in advance, and sanitary and delicious hot water can be obtained.

Moreover, since the temperature rise characteristic is detected by using the temperature sensor for controlling the temperature of the content liquid, and the liquid amount can be determined, it is not necessary to provide a special sensor for detecting the liquid amount. The detection configuration by can be simplified.

As described above, the liquid amount is determined based on the temperature rising characteristics, and by determining the liquid amount, the content liquid can be boiled and set to a predetermined heat retention state before the set time by the timer as described above.

In the above configuration of the second electric hot water storage container of the present invention, the detection result of the liquid amount is used, and correspondingly, the boiling is started before the set time, so that there is no influence of the difference in the liquid amount at the set time. When it reaches, it is possible to deodorize the content liquid by boiling and remove chlorine, trihalomethane, miscellaneous bacteria, etc., and in combination with it, it is possible to obtain a content liquid with a desired heat retention temperature set in advance, and sanitary and delicious hot water is obtained. can get.

Moreover, since the liquid amount is detected by using the existing content liquid outlet passage connected to the body, there is no need for a special conduit for detecting the liquid amount, and the content liquid outlet passage and the liquid amount detecting means. And can be configured as one component, and this liquid amount detection configuration can be simplified.

As described above, the liquid amount is determined based on the temperature rising characteristics, and by determining the liquid amount, the content liquid can be boiled and set to a predetermined heat retention state before the set time by the timer as described above.

(Embodiment) A first embodiment of the present invention shown in FIGS. 1 to 5 will be described.

In this embodiment, as shown in FIG. 1, the heater 1 is attached to the bottom surface of the bottom of the inner container 2, and a heater driving circuit 92 is mounted on the heater 1 by a control circuit 91 (FIG. 3) including a microcomputer (hereinafter referred to as a microcomputer) 66. The content liquid is heated at an appropriate time and at an appropriate temperature by controlling energization between a boiling water state and a heat retaining state.

The inner container 2 is housed and held in the outer case 3 to form a body 4. The mouth 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 releasably and openably and detachably attached to a rear hook-shaped bearing 9 of the shoulder member 5 by a shaft 6. ing. An inner lid 8 provided on the opening 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 at the bottom, and the upper end is opened to the outside. As a result, the content liquid 42 in the inner container 2 always flows in and maintains 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. The inverted U-shaped pipe 23 has a built-in water shutoff valve 25 just above the connection with the elbow 20, and the downward discharge port 19 of the tip of the inverted U-shaped pipe 23 is located on the front side of the inner container 2 from the lower end. A slit 26 is formed to reach a position higher than the full water position.

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 downward is detachably attached from below.

The slit 26 is also involved in the reception in the open state to the atmosphere, and surely prevents the siphon splash and the spouting of the content liquid in the case of sudden pouring. 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 then gently flows downward while squeezing appropriately.

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 easy to obtain a capacitance change, and it is possible to suppress the unspecified 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 unit 17b communicating with the second electrode 17a face each other via the insulating peripheral wall of the liquid level detecting unit 17b,
The size of the confronting area, that is, the electrostatic capacity according to the liquid level height of the content liquid 42 can be obtained.

The difference in electrostatic capacity depending on the liquid level is that the first and second electrodes 41 and 17a are controlled by the microcomputer 6 of the control circuit 91 as shown in FIG.
By connecting to 6 through the water amount detection circuit A, the microcomputer 66
I am trying to type in. 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 the light emitting diode 42 ₁ for external display connected to the microcomputer 66 via the display circuit B according to the judgment. , 42 ₂
· 42 ₆ drives, are the liquid level so that the external display. In particular, in order to prevent empty cooking, when the liquid level is lowered to the extent that water needs to be supplied, the light emitting diode 80 for water supply is turned on to prompt water supply. For the determination of the liquid level, it is easy to make a table of the relationship between the electrostatic capacity and the liquid level at a necessary stage and make the determination based on this table.

Emitting diode 42 _{1-42 6} are to be lit and displayed through the display window 44 on the fender panel 43 attached fitted to the front of the outer body 1. The lowest light emitting diode 42 ₁ indicates a safe minimum water level to prompt water supply, the highest light emitting diode 42 ₆ indicates a full water level, and the other light emitting diodes 42 _{2 to} 42 ₅ indicate each intermediate liquid level.

Under these indicators, boiling, high temperature insulation, 80 ° C insulation,
Light-emitting diodes 46, 47, 79, 80 for displaying water supply, and a light-emitting diode 67 for displaying three kinds of set times of 9 hours, 6 hours and 3 hours when boiling water using a timer
b, 67c, and 67d are provided so as to light up and display through the window 49 of the panel 43, and these are also connected to the microcomputer 66 via the display circuit B for respective display.

On the other hand, the heater 1 is divided into a heat retaining heater 1a and a water heater 1b, which are connected to a microcomputer 66 via a heater drive circuit 92.
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 to keep it at a predetermined temperature before boiling and is kept warm. You can do it.

Energization in the boiling water state is performed when the content liquid temperature detected by the temperature sensor 68 (Figs. 1 and 3) is considerably lower than the heat retention temperature and when the reboil switch 45 is turned on in the heat retention state. When the temperature sensor 68 detects the boiling temperature, it is returned to the heat retention state.

The energization in the heat retention state is normally carried out at 80 ° C, and the heat retention heater 1a is energized while the temperature sensor 68 detects 80 ° C or lower, and the energization of the heat retention heater 1a is stopped when 80 ° C is detected. .

In addition, it is also possible to make a timer boiling to obtain a desired temperature after a predetermined time set by the timer switch 67.When performing this timer boiling, 93-95 ° C immediately after boiling suitable for making coffee etc. The heat retention selection switch 69 can be used to set whether to keep hot water at a high temperature of about 80 ° C. or to keep hot water at a normal temperature of about 80 ° C., which is suitable for making tea a little lower than that. The high temperature heat retention can be performed by energizing the heat retention heater 1a while the temperature sensor 68 detects, for example, 95 ° C. or lower, and stopping the energization when 95 ° C. is detected.

Re-boiling for these energization control, timer, operation buttons 45a, 67a, 69a of each of the heat retention selection 45, 67a, 69a are the display light emitting diodes 46, 47, 79, 80, 67b, 67c, 67d.
The switches 45, 67, 69 and the temperature sensor 68 are provided in the vicinity of, and are connected to the microcomputer 66 via the switch circuit C. It is advantageous to use an individual sensor for detecting a predetermined temperature as the temperature sensor 68, because it is not necessary for the microcomputer 66 to determine the hot water temperature by software, and other specific control can be performed by a hard circuit. Boiling can also be detected by a steam sensor that detects the temperature of steam.
The surface of the panel 43 is provided with a transparent resin cover sheet 48,
Annotations and the like corresponding to various displays are printed on the back surface.

The timer boiling is performed by the time setting and the heat retention selection, but the time setting can be done by turning on the switch 67 with the operation button 67a within a certain time after the heat insulation selection operation is performed, and the set time is 9 hours each time it is turned on. , 6 hours, then 3 hours are switched in a rotary manner together with the time display, and when a specific set time continues for a certain time or longer, the timer operation at the continued set time is started. The timer at this time uses the internal timer 77 of the microcomputer 66 having a CPU or ROM, but is not limited to this. The display corresponding to the set time is lit while the timer is boiling.

In addition, heat insulation selection is done by operating the operation button 69a to switch 6
Each time 9 is turned on, high-temperature heat retention and 80 ℃ heat retention are sequentially switched together with their displays, and when the time setting operation of the timer water heating is performed within a certain time after the switching operation, the last switching is performed. It is designed to be kept warm. At the same time as this setting, the heat retention selection display is extinguished, and when the selected heat retention state is reached as a result of the timer boiling, the heat retention selection display section corresponding thereto continues to light up to display that fact.

However, there are some cases where you may want to confirm how you have selected the heat retention during the timer boiling operation, and want to confirm it during the operation. For this reason, when the heat retention selection button 69a is operated and the switch 69 is turned on during the timer boiling operation, the display corresponding to the preset heat retention selection state is lit to inform the user.

The microcomputer 66 is mounted on the board 67 together with other circuit parts of the control circuit 91 including it, and operates based on the clock signal from the clock generation circuit D and also controls the operation of the signal buzzer 65. The signal buzzer 65 should be activated during a water supply warning or abnormal temperature rise, but it is also useful when activated when there is an unplug signal from the unplug circuit E.

The board 67 is integrally formed on a part of an annular bottom plate 71 attached to the lower end of the outer case 3 and opens downward.
It is stored in 72 from below and screwed.

A rotating bottom plate 72 is mounted on the outer periphery of the bottom plate 71. The rotating bottom plate 72 forms an annular body in which an annular outer wall 73 and an annular interior wall 74 are connected at their lower end portions, and is rotated between the bottom plate 71 and a locking ring 76 attached to the lower surface of the annular plate 73 through a support fitting 75. It is movably held. The support fitting 75 is attached to the bottom plate 71, and the locking ring 76 is attached to the support fitting 75.

The connection terminal 101 from the control circuit 91 to the first electrode 41 is attached by a shrink resin film 102 which is applied to the outer surface of the first electrode 41 and covers the liquid level detection unit 17b, and is connected to the first electrode 41. I try to keep the contact of each other firmly.

Further, from the top of the shrink resin film 102, the terminal 101
The resin band 103 is fastened to the base-corresponding part of the terminal so that the terminal 101 does not come off.

The connection terminal 104 to the second electrode 17a is connected to the metal piece 105 spot-welded to the second electrode 17a.

By the way, in order to boil the content liquid and lower the temperature to a predetermined heat retention temperature state after boiling, the required time varies depending on the amount of the content liquid, which is a problem in the case of timer boiling. Therefore, in this embodiment, the liquid amount is discriminated by the liquid amount detecting means, and the content liquid is boiled before the time set by the time setting means by the timer according to the liquid volume discriminating result, and a predetermined heat retention state after the boiling. When the set time elapses, hot water having a predetermined heat retention temperature can be obtained.

However, the rate of temperature decrease is greater than the rate of temperature increase in the liquid volume, which is a particular problem. It doesn't matter. For this reason, when the high temperature insulation is selected, the boiling water is started 30 minutes before the set time regardless of the amount of the liquid, and the high temperature state is set after the set time even in the worst full state.

On the other hand, in the case of 80 ° C heat retention, the content liquid is boiled and boiled 2 hours before the set time elapses, and the time is delayed as the amount of the liquid decreases so as to shift to the predetermined heat retention state after this boiling. Hot water having a predetermined heat retention temperature is obtained when the set time has elapsed.

The table below shows this.

The operation control in the case where the preset time is 9 hours and the 80 ° C. heat retention is set will now be described with reference to the flowchart shown in FIG.

When the 80 ° C. heat retention setting (step # 1), the timer 9 hours setting / display ON and the heat retention display OFF (step # 2) are performed, those settings are sequentially confirmed in steps # 3 and # 4. As a result, a time count of 7 hours, which is the reference time when 9 hours is set, is performed (step # 5), and when it is determined that this count has ended (step # 6), the liquid amount detection means is executed in the next step # 7. The amount of the content liquid is determined by. According to the determination result of the liquid amount, the liquid amount is changed in step # 8.
Whether it is equal to or higher than 1.7 l, it is heated and boiled as it is, and then boiled until the boiling is judged (steps # 9 and # 10), and the predetermined heat retention state is maintained at 80 ° C. Switch to the heat retention operation, transition to the heat retention state and finish the boiling water operation, continue the 80 ℃ heat retention operation until the set time by the timer, notify the buzzer at the same time as the end, turn off the timer set time display,
Turn on the ℃ insulation display (Steps # 11, # 12, # 1
3).

If the liquid volume is below 1.7 l in step # 8, step # 21
If the liquid amount is equal to or higher than 1 here, an additional count of 30 minutes is performed, and after this is finished (steps # 22 and # 23), the above-mentioned processings after step # 9 are performed.

If the liquid amount is below 1 in step # 21, step # 24
If it is 0.3 l or more, additional counting for 60 minutes is performed, and after it is completed (steps # 25, # 26), step #
The above processes after 9 are performed.

If the amount of liquid is less than 0.3 l in step # 24, it means that water supply is necessary, and therefore the process returns without water heating.

FIG. 5 shows the change of the content liquid temperature in the timer boiling operation with the temperature kept at 80 ° C. for 9 hours.

In short, in the present embodiment, the determination result of the liquid amount is used, and in response to this, since the boiling water is started before the set time by the timer, the content liquid is reached when the set time is reached without the influence of the difference in the liquid amount. Can be boiled by heating with water, and after this boiling, a predetermined heat retention state can be achieved.

Further, since the liquid amount is detected by using the existing outlet line 17 for the content liquid which is connected to the inner container 2 of the container 4, there is no need for a special conduit for detecting the liquid amount, and the content liquid is not required. The lead-out path and the liquid amount detecting means can be configured as one component, and the liquid amount detecting configuration can be simplified.

FIG. 6 shows a second embodiment of the present invention.
The content liquid is heated to 90 ° C by boiling at the reference time before the set time by the same time setting means as in the example,
At this time, the temperature rise characteristic of the content liquid after reaching 90 ° C. is determined by the microcomputer, and the liquid amount of the content liquid is determined by the difference in the slope of the temperature rise characteristic. This determination is based on the rate of temperature change at a fixed time t ₁ after 90 ° C. It is convenient to make a table of the relationship between the amount of liquid (see FIG. 7) and the amount of liquid in advance at a necessary stage and use this table as a basis.
Note that this determination is more reliable as the temperature is higher.

Then, in the same manner as in the first embodiment, the required time t ₂ is additionally counted according to the determination result of the liquid amount, and then the water is heated and boiled to be boiled. Make sure that hot water with a prescribed heat retention temperature is obtained.

In short, in the present embodiment, in order to obtain hot water after boiling water at the time when the set time is reached, the temperature rising characteristics corresponding to the temperature rising characteristics including information such as the difference in liquid amount when the content liquid is heated Since the amount of the content liquid is determined by, and boiling is started at the time set by the timer, when the set time is reached despite the difference in the amount of liquid, the content liquid is heated and boiled. It is possible to shift to a predetermined heat retention state later.

Moreover, since the temperature rise characteristic allows the amount of liquid to be determined by using the temperature sensor 68 for controlling the temperature of the content liquid, it is not necessary to provide a special sensor for detecting the amount of liquid, The detection configuration by the sensor can be simplified.

FIG. 8 shows a third embodiment of the present invention. After elapse of the reference time t ₃ , the content liquid is heated to 60 ° C. by boiling, and the content liquid is heated to 60 ° C. or higher and returned to 60 ° C. again. The amount of the content liquid is determined according to the difference in the time t ₄ until. This determination is also convenient when using a table.

Then, according to the determination result of the liquid amount, before the time set by the time setting means elapses, the required time t ₂ corresponding to the liquid amount is additionally counted as in the first embodiment, and then the water is heated and boiled to boil. After that, the heating is finished by shifting to a predetermined heat retention state.

FIG. 9 shows a fourth embodiment of the present invention. For example, at the beginning of the timer boiling operation, for example, 30 seconds after setting the timer time, the content liquid is once boiled and heated. In that case, for example, 90 ° C. to 95 ° C. The amount of the content liquid is determined by the difference in the temperature rise time t ₅ to ℃. Then, the content liquid is boiled and heated to boil before a predetermined time t ₆ corresponding to the liquid amount with respect to the set time, and the transition to a predetermined heat retention state after boiling is performed to terminate the boiling. FIG. 10 shows an example of the control flow in this case.

Since boiling is performed at the beginning of the timer boiling operation in the case of this embodiment, if you want to use hot water during the timer operation, there is an advantage that you can immediately obtain hot water after sterilization and deodorization by boiling and set time. After the lapse of time, the content liquid is boiled twice, so sterilization and deodorization are performed twice using the time during the timer operation, and sanitary and tasty hot water can be obtained without substantial time loss. To be

In each of the above-described embodiments, the case where the determination of the liquid amount is performed by the microcomputer has been described, but the invention is not limited to this.
Other methods such as an electrode method that determines the presence or absence of energization through the content liquid between the electrodes in a stepwise manner, a photo sensor method that determines by detecting the position of the float according to the amount of the content liquid with a photo sensor, etc. Various known ones can be adopted.

(Effect of the Invention) According to the present invention, in the above configuration of the first electric hot water storage container of the present invention, the temperature rise when the content liquid is heated to obtain hot water after boiling has reached the set time It is possible to determine the liquid volume of the content liquid based on the characteristics, to start boiling water before the set time to boil the content liquid, and to transition to a predetermined heat retention state after this boiling, so regardless of differences in the liquid volume, etc. Without the timer, when the set time is reached, deodorization of the content liquid by boiling and removal of scaly, trihalomethane, bacteria etc. can be done,
Along with that, it is possible to obtain a content liquid having a preset desired heat retention temperature, and to obtain sanitary and delicious hot water.

Moreover, since the temperature rise characteristic is detected by using the temperature sensor for controlling the temperature of the content liquid, and the liquid amount can be determined, it is not necessary to provide a special sensor for detecting the liquid amount. The detection configuration by can be simplified.

As described above, the liquid amount is determined based on the temperature rising characteristics, and by determining the liquid amount, the content liquid can be boiled and set to a predetermined heat retention state before the set time by the timer as described above.

In the above configuration of the second electric hot water storage container of the present invention, the detection result of the liquid amount is used, and correspondingly, the boiling is started before the set time, so that there is no influence of the difference in the liquid amount at the set time. When it reaches, it is possible to deodorize the content liquid by boiling and remove chlorine, trihalomethane, miscellaneous bacteria, etc., and in combination with it, it is possible to obtain a content liquid with a desired heat retention temperature set in advance, and sanitary and delicious hot water is obtained. can get.

Moreover, since the liquid amount is detected by using the existing content liquid outlet passage connected to the body, there is no need for a special conduit for detecting the liquid amount, and the content liquid outlet passage and the liquid amount detecting means. And can be configured as one component, and this liquid amount detection configuration can be simplified.

As described above, the liquid amount is determined based on the temperature rising characteristics, and by determining the liquid amount, the content liquid can be boiled and set to a predetermined heat retention state before the set time by the timer as described above.

[Brief description of drawings]

1 is a vertical sectional view of an electric pot showing a first embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a block diagram of a control circuit, FIG. 4 is a control flow chart, and FIG. FIG. 6 is a graph showing changes in liquid temperature according to the amount of liquid when the temperature is kept at 80 ° C. with the timer heating in the first embodiment, and FIG. 6 shows the second embodiment of the present invention in which the timer heating at 80 ° C. is performed. FIG. 7 is a graph showing an example of liquid temperature change in FIG. 7, FIG. 7 is an explanatory diagram of liquid amount determination, and FIG. 8 shows an example of temperature change in a timer water heating in the case of 80 ° C. heat retention showing a third embodiment of the present invention. A graph, FIG. 9 is a graph showing an example of the liquid temperature change in the case of keeping the temperature at 80 ° C. showing the fourth embodiment of the present invention, and FIG. 10 is a control flow chart. 1 …… Heater 1a …… Heat retention heater 1b …… Boiler heater 17b …… Liquid level detector 42 …… Contents liquid 66 …… Microcomputer 67 …… Timer switch 67a …… Operating button 68 …… Temperature sensor 77 …… Internal timer 91 …… Control circuit 92 …… Heater drive circuit

Claims (2)

[Scope of utility model registration request] 1. A heater for heating a content liquid, an energization control means for controlling energization of the heater to a boiling state, a boiling state and a predetermined heat retaining state, a time setting means, and a time measurement after the time is set by the time setting means. And a liquid amount determination means for heating the content liquid to determine the liquid amount of the content liquid based on the temperature rise characteristic, and the energization after the start of time measurement by the timer and before the time set by the time setting means elapses. The boiling water operation start means for starting the heating and energization by the control means and the liquid quantity by the liquid quantity detecting means are used to boil the content liquid before the time set by the time setting means elapses according to the result of the judgment of the liquid quantity. An electric hot water storage container, comprising: a boiling water heating operation; and a boiling water heating operation terminating means for terminating the boiling water by shifting to a predetermined heat retention state after the boiling. 2. A heater for heating the content liquid, an energization control means for energizing and controlling the heater to a boiling state and a boiling and predetermined heat retention state, the time setting means, and a time after the time setting by the time setting means. A liquid amount detecting means for detecting the liquid amount of the content liquid by using a content liquid discharge passage that rises upward from the connection portion between the timer for measuring the time and the bottom of the body of the electric hot water storage container, and pours out the content liquid, After the start of the time measurement by the timer and before the time set by the time setting means elapses, the energization control means starts the energization of the boiling water, and the liquid quantity detecting means determines the liquid quantity and the liquid quantity is determined. Depending on the result, the content liquid is heated and boiled before the time set by the time setting means elapses, and after this boiling, the heating operation is completed by shifting to a predetermined heat retention state and ending the water heating operation. Electric hot water storage vessel, characterized in that it comprises and.