JP3562477B2 - Electric hot water storage container - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric hot water storage container that heats and heats the liquid content in the container by a heater, and is applied to, for example, an electric pot for home use.
[0002]
[Prior art]
This type of electric hot water storage container is widely used as an electric pot for home use, and is becoming multifunctional and individual. For example, coffee, black tea, green tea, etc. need to be kept at a high temperature of about 98 ° C, which can be used immediately or reboiled immediately, and at a slightly lower temperature of about 90 ° C, gyokuro or baby There is also a type in which a heat retention of about 60 ° C. suitable for melting milk can be set. On the other hand, the content liquid is boiled once as shown in FIG. 3 from the aspect of hygiene and removal of the smell of lime, or the liquor is removed such as by continuing the boiling. After exceeding once, heating by the heater is stopped until the target heat retaining temperature is reached, and after reaching the predetermined heat retaining temperature, a heating mode is set in which heating by the heater is performed to maintain the heat retaining temperature.This is something that has been done conventionally and is usually kept warm.In addition, in the case of an electric kettle having a good heat retaining performance such as a vacuum double container, in particular, after performing water boiling or descaling, the heater is continuously used for a long time without performing the heat retaining by heating.Such as warmthDone.This is due to the heat retention of the container which is different from the normal heat retention, and will be referred to as a warm insulation of a bottle.
[0003]
Further, in an electric pot or the like, the temperature of the content liquid is detected by a temperature sensor and displayed externally for the convenience of the user.
[0004]
[Problems to be solved by the invention]
By the way, the detection of the temperature of the content liquid by the temperature sensor is often performed in a part of a container in which the content liquid is heated by a heater and stored. Moreover, the temperature detection part is often performed at the bottom of the container. In the case of storing hot water in a vacuum double container, it is recommended that the temperature of the content liquid be detected at the bottom of the single structure by utilizing the fact that only the bottom has a single structure in order to heat the content liquid with a heater. It has become ordinary.
[0005]
However, the temperature of the liquid content in the container is not uniform, and there is a difference as shown in FIG. 3 at the bottom of the container, at the full position, and at an intermediate position between them. In particular, in the heat-retaining state in which the content liquid is not heated by the heater, there is no convection due to the heating of the content liquid, so that the temperature differs between the lower part and the upper part of the content liquid. The temperature of the container having no heat insulation structure is faster than that of the container, and the temperature difference between the lower part and the upper part is particularly large. Due to such a temperature difference, if the temperature of the content liquid detected in a part of the container is externally displayed as it is, the user may feel it or the temperature of the content liquid may be different from the temperature measured for cooking or the like. Such a shift gives the user distrust and inconvenience in using the content liquid at an appropriate temperature according to the application.
[0006]
An object of the present invention is to provide an electric hot water storage container that corrects and displays the temperature of a liquid content detected in a part of a container to an appropriate side, and reduces a user's distrust or inconvenience.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the electric hot water storage container of the present invention includes:It has a heat insulating structure,Container heated by a heater to keep the water hot and warmAtThe temperature of the contentsBottomHeating by the heater is not performed in the electric hot water storage container that is detected by the temperature sensor and displays the content liquid temperature to the outside based on the detected temperatureMahobinWhen keeping the temperature, the temperature detected by the temperature sensorIn response to the warm insulation of mahobinCorrect to the appropriate side with a predetermined ratio or value, If you do not keep the warm bottle warm,It is characterized by comprising control means for displaying.
[0008]
The temperature of the content liquid that is not heated by the heater is low at the bottom and high at the top.Therefore, depending on which part of the container the temperature sensor detects the temperature of the content liquid, the detected temperature is lower than the temperature at which the content liquid is desired to be known. You can tell if it is going to be higher or higher. Therefore, in the above configuration, the heaterAt the bottomNo heatingMahobinWhen in the warm state, that is, when the convection of the content liquid is slow or does not occur, the control meansBottomThe temperature of the content liquid detected by the temperature sensor is corrected to the proper side that is uniquely determined by the temperature detection position of the temperature sensor, and the content liquid temperature can be displayed externally. The difference between the temperature of the contents and the temperature of the contents can be reduced to reduce the distrust and inconvenience.
[0010]
In the electric hot water storage container of the present invention, the display of the content liquid temperature is performed stepwise based on the upper and lower threshold values corresponding to each of the preset temperatures, and the threshold value is heated by the heater.When boilingAnd not heated by heaterWhen warming a warm bottleIt is also characterized by having a control means for switching between.
[0011]
In such a configuration, the content liquid temperature is displayed in stages, so that it is normal that there is a difference from the content liquid temperature by the amount of the step, so that the user's awareness of the difference can be reduced and the control means can be reduced. Not heated by heaterWhen warming a warm bottleIs heated by heaterWhen boilingBy using the threshold value by switching to the threshold value, the stepwise display temperature can be corrected to an appropriate side, and the inconvenience to the user can be reduced.
[0018]
The electric hot water storage container of the present invention also includes:A temperature sensor at the bottom detects the temperature of the content liquid in a container that is heated by a heater, is boiling water, or keeps the temperature, and displays the temperature of the content liquid to the outside based on the detected temperature, and a stirring means for stirring the content liquid. The electric hot water container provided has a display temperature optimizing mode, and in this mode setting, a control means is provided to reduce the temperature unevenness of the content liquid by operating the stirring means. Stop when it falls below a certain rangeIt is also characterized.
[0019]
In such a configuration, the content liquid is agitated by the agitating means and aggressively agitated, so that the temperature difference of each part of the content liquid can be eliminated and the size can be minimized.In particular, the user can set the display temperature optimization mode when the accuracy of the liquid temperature is required or anxious, or automatically set as the preliminary operation mode for dispensing when there is a dispensing operation. By doing so, it is possible to automatically perform the optimizing operation by the control means, the content liquid is agitated and agitated by the optimizing operation, so that the temperature unevenness is eliminated, and the temperature sensor is used. Since the detected temperature and the display temperature based thereon are optimized, it is possible to eliminate the user's distrust and inconvenience. In addition, the display temperature optimization mode is stopped when the change in the detected temperature falls below a certain range, and can be set within the error setting range of the content liquid temperature to be detected.
[0024]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in various combinations in combination as far as possible.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings to provide an understanding of the present invention.
[0026]
Each embodiment is an example in which the present invention is applied to an electric pot. However, the present invention is not limited to this, and is effective when applied to a general hot water storage container that is heated by a heater to heat water and keep heat as described above.
[0027]
As shown in FIG. 1, the electric pot of this embodiment has a metal vacuum double container 3 composed of a stainless steel inner cylinder 4 and an outer cylinder 5 which have a low thermal conductivity and are advantageous for keeping heat. 4 is provided with a heater 11 for heating the content liquid in 4, a discharge path 25 for guiding the content liquid to the outside, a manual bellows pump 10 and an electric pump 26 for discharging the content liquid through the discharge path 25. The container 1 is accommodated in the outer case 2 of the first embodiment. However, the vacuum double container 3 may be configured such that its body is exposed to the outside to form the container 1. The rising portion 25a that rises outside the vacuum double container 3 of the discharge path 25 is formed of a transparent tube, which can be visually recognized from the outside through a transparent liquid amount display window 35 at the front of the outer case 2, and the vacuum portion at the rising portion 25a. The liquid amount is displayed outside by the liquid level at the same level as in the heavy container 3. However, this liquid amount can be automatically detected by a photocoupler or the like, or can be automatically detected by a capacitance method. In addition, the amount of liquid can be automatically detected based on the temperature rising characteristic when the content liquid is heated by the heater 11 and the temperature decreasing characteristic when the heating of the heater 11 is stopped. In this case, accuracy is improved when room temperature is taken into consideration. The liquid amount automatically detected can be displayed or used as data for various controls.
[0028]
At the opening edge of the vacuum double container 3, the outer flanges of the inner and outer cylinders 4 and 5 constituting the vacuum double container 3 are formed, and the outer flange is placed on the upward step of the shoulder member 6 of the body 1. It is placed. The outer case 2 has a bottom 2a and a body 2b integrally formed. The inner cylinder 4 of the vacuum double container 3 has a container shape with a bottom, but the outer cylinder 5 has a cylindrical shape, and the lower end portion is bent inward to apply welding to the bottom of the inner cylinder 4 from outside. It is integrated so that there is no vacuum leakage by brazing. The heater 11 is applied to the outside of the single bottom 3c of the vacuum double container 3 formed thereby, so that the content liquid can be efficiently heated, and the water can be heated and kept warm. The outer flange of the vacuum double container 3 is welded to the outer peripheral portion where the outer flanges of the inner and outer cylinders 4 and 5 are overlapped.
[0029]
The shoulder of the body 1 is formed by an independent shoulder member 6 made of synthetic resin because of its complicated shape and structure. The shoulder member 6 is fitted to the upper end of the outer case 2 from above, and the outer flange of the vacuum double container 3 is placed on the upward step at the lower part of the rising wall forming the inner periphery of the shoulder member 6. The outer case 2, the shoulder member 6, and the vacuum double container 3 are integrally joined by connecting the bottom of the vacuum double container 3 and the bottom of the outer case 2 with metal fittings and screws (not shown). The shell 1 is constituted.
[0030]
An opening 12 formed by the shoulder member 6 of the container 1 is provided with a lid 13, and the opening 12 is opened and closed together with the opening 52 of the vacuum double container 3. For opening and closing, the lid 13 is pivotally supported on a bearing 15 provided at the rear of the shoulder member 6 so as to be detachable by a hinge pin 16. In the operation of opening and closing the lid 13 by opening and closing by rotation about the hinge pin 16, the hinge pin 16 is attached to the bearing portion 15 at the open position where the lid 13 is out of the fitting position with the opening 12 of the body 1. Can be inserted or pulled out through the inward slit.
[0031]
The lid 13 is formed with a vapor passage 17 for allowing the vapor from the vacuum double container 3 to escape to the outside, and is formed on an inner opening 17a of the lid 13 at a position facing the inside of the vacuum double container 3 and an outer surface exposed to the outside. It communicates with the outside opening 17b. In the middle of the steam passage 17, a safety path 17c is provided for temporarily storing or bypassing the content liquid when the container 1 rolls over and enters, thereby delaying the liquid from reaching the outer opening 17b. This makes it possible to take measures such as raising the container 1 before the container 1 rolls over and the content liquid flows out through the vapor passage 17 to the outside. Further, in the steam passage 17, when the vessel 1 rolls over, a water stop valve 18 at the time of overturning which works by its own weight or the like so as to try to enter the steam passage 17 or to prevent the entered liquid from proceeding ahead is provided in an appropriate position. Is provided. In the illustrated embodiment, it is provided at one location just inside the inner opening 17a.
[0032]
A lock member 21 is provided at the front of the lid 13 to lock the lid 13 in the closed position by engaging with the locking portion 19 on the shoulder member 6 side in the closed position, and the locking portion when the lid 13 is closed. 19 is always projected to the locked position by the bias of the spring 22 so as to automatically engage with the lock member 19. Correspondingly, the lid 13 is provided with a lock release member 23 for retreating the lock member 21 to release the lock. As shown in FIG. 1, the lock releasing member 23 is of a lever type pivotally supported on the lid 13 by a shaft 24, and the front end 23a is depressed with a thumb or the like and rotated counterclockwise to turn the lock member 21 into a spring. The unlocked lid 13 can be lifted and opened by lifting the rear end 23b raised by the unlocking operation with another finger to retract the unlocked lid 13 by retracting it against the lid 22.
[0033]
The electric pump 26 is a centrifugal pump and is provided at a position immediately below the vacuum double container 3, and sends out the liquid flowing from inside the vacuum double container 3 to the discharge port 25 d facing the outside of the body 1 through the discharge path 25. The liquid is discharged from the discharge port 25d to the outside for use. Each time the bellows pump 10 is pressed by the pressing plate 20 facing the upper surface of the lid 13, the volume is reduced, the internal air is sent into the vacuum double container 3, the content liquid is pressurized, and the liquid is pushed out and discharged through the discharge path 25. After the pressing operation, the bellows pump 10 is restored by the restoring spring 30 and sucks outside air. An intake valve 40 and a discharge valve 50 are provided for discharging and sucking such air. The discharge valve 50 switches and connects an air supply passage for supplying discharge air into the vacuum double container 3 by discharging and non-discharging air, and the vapor passage 17 into the vacuum double container 3. When such a manual pump is provided, the vacuum double container 3 has a good heat retaining property, so that the vacuum double container 3 is carried in a place where there is no power supply, and is used in a heat retaining state in which the heating by the heater 11 is not performed. In such a case, if the content liquid is manually poured, the electric system load can be used for a long time even when driven by a primary battery or a secondary battery, limited to the display system and its control degree. However, the secondary battery can be automatically charged when the power is used. Since both primary and secondary batteries reach their end of life, they should be replaced.
[0034]
In the space between the bottom 2 a of the outer case 2 and the bottom of the vacuum double container 3, a circuit box 28 that accommodates the control board 27 for controlling the heater 11 and the electric pump 26 together with the discharge pump 26 is installed. ing. In the illustrated embodiment, the circuit box 28 is provided integrally with the opening at the bottom of the outer case 2. The circuit box 28 is provided with a lid 60 that opens downward and closes it. A temperature sensor 29 is applied to the center of the single bottom 3c of the vacuum double container 3 from below, detects the temperature of the content liquid at each time, and controls the temperature when heating and controlling the content liquid in a water heater or a heat retention mode. get information.
[0035]
An operation panel 32 as shown in FIG. 2 is provided on the upper surface of the beak-shaped protrusion 31 protruding from the front part of the shoulder member 6 of the container 1, and an operation unit such as a mode setting, a display corresponding to the operation, or A display indicating the operation state is provided. An operation board 33 is provided below the operation panel 32 for transmitting and receiving signals corresponding to the operations and displays. The upper part of the discharge passage 25 is formed between the beak-shaped protrusion 31 of the body 1 and the pipe cover 2d of the outer case 2 to form an inverted U-shaped unit 25c. The water stop valve 34a, the water stop valve 34b when leaning forward, and the discharge port 25d are provided. The discharge port 25d opens downward to the outside through the pipe cover portion 2d and the cover 2e thereunder.
[0036]
A cover plate 36 is applied to the opening 2c at the bottom 2a of the outer case 2 from below by screwing or partially engaging the cover plate 36 so that the rotary seat ring 37 can rotate around the outer periphery of the cover plate 36. It is provided so as to be supported, so that when the container 1 is fixed on a table surface or the like, it can be rotated slightly on the rotating seat ring 37 to change its direction.
[0037]
When the power is turned on, the control board 27 automatically performs water heating by heating the heater 11 shown in FIG. 3 as initial boiling, and after the boiling, stops heating the heater 11 until the temperature detected by the temperature sensor 29 reaches a predetermined warming temperature. When the predetermined heat retention temperature is reached, the predetermined heat retention temperature is maintained by intermittent heating by the heater 11 or heating with a small current-carrying capacity. The predetermined heat retaining temperature is 98 ° C. or 90 ° C. set by operating the heat retaining key 41. The warming key 41 is also a warming mode in which heating by the heater 11 is not performed, for example, a mahobin.Keeping warmYou can also set the mode. This magic bottleKeeping warmIn the mode, heating by the heater 11 is not performed even in a use state in which the power supply is connected to a household power supply.Mahobin insulationIs executed. Driving of the electric pump 26 can be either not prohibited or prohibited. If the electric pump 26 cannot be driven in addition to the heater 11, it is suitable for use in a place where there is no household power supply in addition to energy saving measures. In this case, the operation is switched to the operation using the primary battery and the secondary battery.
[0038]
At the same time, the liquid crystal display unit 42ConfigurationInsulation temperature of 98 ℃, 90 ℃NormalIn addition to the warming mode, the content liquid temperature at that time is displayed as shown in FIG. 2 also in the magic bottle warming mode. Of course, in the heat retention mode at the set temperature, the set temperature can be continuously displayed. The vacuum bottle warming mode can be canceled by operating the warming key 41. The control board 27 determines that water has been replenished and automatically performs the same water boiling as the initial boiling when the content liquid temperature falls below a set warming temperature by a predetermined value or more when cold water or the like is replenished. However, during normal heat retention at the set temperature, water boiling control is performed only when there is a re-boiling operation using the re-boil / night key 44. The re-boiling / sleep key 44 alternately sets a sleep mode in which the scheduled time of completion of re-boiling and water boiling by initial boiling is set to 6 hours, 9 hours, or the like. The control board 27 controls such a sleep mode. Is also controlled. When the kitchen timer key 45 is operated, the control board 27 counts the time required for predetermined cooking such as reproduction of a preset dry food or frozen food, and notifies the liquid crystal display unit 42, sound, or voice of the end of the count. . The count time can be selected from a plurality of types or set freely. When the hot water supply key 46 is operated, the control board 27 drives the electric pump 26 so that the content liquid can be automatically poured out.
[0039]
By the way, the temperature sensor 29 detects the temperature at the bottom of the content liquid. However, when the heating by the heater 11 is not performed, the temperature of the middle liquid and the upper part of the content liquid gradually decrease without much difference. On the other hand, the temperature of the liquid content at the bottom detected by the temperature sensor 29 drops faster than the temperature at the middle part and the upper part, and the difference from the temperature at the middle part and the upper part becomes larger as time passes. For this reason, if the temperature detected by the temperature sensor 29 is displayed as it is to display the content liquid temperature as described above, there is a difference between the content liquid temperature that the user feels or measured for cooking and the like, It causes distrust and inconvenience. In order to cope with this, in the present embodiment, the temperature display control as shown in the flowchart of FIG. While the liquid temperature is being measured by the temperature sensor 29, the measured temperature is displayed as it is when the water heating operation is being performed. However, once the water heating operation is completed, the heating by the heater 11 is temporarily stopped for a relatively long time. In this embodiment, since the temperature sensor 29 detects the bottom temperature that changes at a low level of the content liquid, the temperature is corrected to the + side and the temperature is displayed. Then, if the warmth retention is set, the temperature display by the correction is continued as it is. If the warming is not set, the temperature is returned to the uncorrected temperature display in response to the start of heating for keeping the temperature by the heater 11 when the content liquid temperature falls to the set keeping temperature.
[0040]
Since there is a tendency in the transition of the temperature difference, a table corresponding to the tendency is prepared, and if the control board 27 corrects the temperature detected by the temperature sensor 29 according to this table, it can be displayed properly and appropriately. However, the temperature difference varies depending on the amount of the content liquid. FIG. 5 shows the temperature drop characteristics between the bottom portion temperature and the middle portion temperature of the four types of electric pots A, B, C, and D when the content liquid is not heated by the heater 11 in a full state. The bottom temperature A1 and the middle temperature A2 in the case of a 4L capacity electric pot without a container are shown, and B is the bottom temperature B1 and the middle temperature B2 in the case of a 3.2L capacity electric pot without a vacuum double container. C indicates the bottom temperature C1 and the middle temperature C2 in the case of a 2.3 L capacity electric kettle having the vacuum double container 3, and D indicates the capacity 3.3L having the vacuum double container 3. 3 shows the bottom temperature D1 and the middle temperature D2 in the case of the electric pot, but the tendency is that the temperature difference between the electric pots A and B is small when the liquid amount is small. In order to cope with such a difference in the temperature difference due to the difference in the liquid amount, the table is prepared so that the correction width of the detected temperature is changed based on the liquid amount, and the temperature correction is performed based on the correction amount. Do. The change in the liquid amount in the same electric pot may be detected by any method such as the method described above.
[0041]
FIG. 5 shows the experimental results when the room temperature is set to 35 ° C. in the constant temperature room, and FIG. 6 shows the experimental results when the room temperature is set to 5 ° C. As can be seen by comparing FIGS. 5 and 6, the temperature difference differs depending on the room temperature. Therefore, the table is prepared so that the correction range of the detected temperature is changed based on the room temperature, and the temperature correction is performed based on the table. It is preferable that the room temperature is detected by a room temperature sensor 48 provided on the operation board 33 for setting a display or a mode provided inside the operation panel 32 so as not to be affected by the heat of the heater 11. However, the place where the room temperature sensor 48 is installed is not particularly limited.
[0042]
Further, as can be seen from FIGS. 5 and 6, the temperature difference also differs depending on the difference in the heat retaining function of the electric pot. Therefore, it is preferable to make a table corresponding to all the differences in the type, the liquid amount, and the room temperature and perform the temperature correction. In this embodiment, the temperature correction is performed so as to match the transition of the middle part temperature of the content liquid as much as possible. I'm trying to do it.
[0043]
Further, the control board 27 displays a temperature display corresponding to a temperature change from 100 ° C. to 5 ° C. every 100 ° C., 95 ° C., 90 ° C., and 85 ° C. at each preset temperature, for example, to each display temperature. It can be performed stepwise based on the corresponding upper and lower thresholds, and the threshold can be switched between when the heater 11 is heating and when the heater 11 is not heating. FIG. 7 and FIG. 8 show one example. In addition, the bottom temperature C whole 1 and the middle stage B temperature C whole 2 in the whole amount state C of the pot C shown in FIG. 7 are the same as the bottom temperature C half 1 and the middle stage temperature C half 2 in the half amount state C. This indicates that the temperature difference is different when the liquid amount is different in the electric pot, that is, the temperature difference is smaller when the liquid amount is small.
[0044]
The above threshold value is set, for example, to α = 88.1 to 92.8 ° C. with respect to the temperature display of 90 ° C., and the display of 90 ° C. is performed while these temperature ranges are detected. As described above, when the content liquid temperature is displayed in steps of 5 ° C. or the like according to the threshold α, it is normal that there is a difference from the content liquid temperature by that step, and the user's awareness of the difference is reduced. be able to. In addition, as shown in FIG. 8, the control board 27 switches the threshold value β when not heating by the heater 11 to the threshold value α when heating by the heater 11 to use the stepwise display temperature on the appropriate side. This can be corrected, and inconvenience to the user can be reduced.
[0045]
Switching between the thresholds α and β shifts the threshold β to the negative side with respect to the threshold α when the temperature detection position by the temperature sensor 29 is at the bottom as described above. Specifically, the threshold α is set to 87.0 to 92.8 ° C., and the threshold β is set to 87.0 to 91.7 ° C. for use. With this configuration, the display temperature when the heater 11 is not heated is displayed based on a lower threshold than the display temperature when the heater 11 is heating, so that the display temperature with respect to the detected temperature is increased. It can be corrected by the eyes to cope with the lowering of the content liquid temperature on the bottom side. In the above specific example, the display temperature based on the bottom temperature detection is 90 ° C. when the middle stage temperature is 95 ° C. when not heated by the heater 11, but the 90 ° C. is displayed when the bottom temperature 93.8 ° C. is detected. That is, the display temperature approaches the middle stage temperature.
[0046]
Separately, as the threshold β when the heating by the heater 11 is not performed, a threshold that sets the display temperature close to the upper limit is set. For example, the threshold value β for the display temperature of 90 ° C. is set to 90.2 to 85.0 ° C. In this case, the threshold value β is further shifted to the lower temperature side with respect to the threshold value α as compared with the above case, so that it is suitable when the difference between the bottom portion temperature and the middle portion temperature is large.
[0047]
However, it is preferable that the switching to the threshold value β is made into a table corresponding to the difference between the type, the liquid amount, and the room temperature and used for the temperature correction.
[0048]
In addition, at the time of heat retention where heating by the heater is not performed, that is, after heating waterNormally in warm modeDuring the transition to the set insulation temperature, or in the warm insulation modeWhen warming a warm bottleThen, the control board 27 performs heating by the heater for a predetermined time every predetermined time.
[0049]
By heating the content liquid in this way, the detected temperature can be brought close to the content liquid temperature by convection, and the user can feel the displayed temperature and the difference between the measured content liquid temperature and distrust. And inconvenience can be reduced. In particular, when the temperature detection and heating of the content liquid are performed at the bottom of the vacuum double container 3 or the like, the heating of the heater 11 raises the temperature of the content liquid having a lower temperature, so that the temperature can be further optimized. However, since the correction can be performed early because the temperature may reach the temperature sensor 29 without passing through the content liquid, one heating operation can be performed in a short time. For example, in an electric pot having a difference between the bottom temperature E1 and the middle temperature E2 as shown in FIG. 9E, heating by the heater 11 is performed every 5 minutes for about 10 seconds to 30 seconds. ′, The bottom temperature E′1 detected by the temperature sensor 29 could approach the middle temperature E′2. In the example of E 'shown in FIG. 9, heating is performed for 30 seconds when the temperature difference is large, and heating is performed for 10 seconds when the temperature difference is small. Depending on the heating method, the bottom temperature E′1 can be made closer to the middle stage temperature E′2.
[0050]
Furthermore, heating by the heater is not performedNormalDuring warming, that is, after boilingNormally in warm modeDuring the transition to the set insulation temperature, or in the warm insulation modeInsulation of mahobinAt times, the electric pump 26 shown in FIG. 1 is reversely driven by the control board 27 at predetermined time intervals as a stirring means 49, and the content liquid in the discharge path 25 is sent back into the vacuum double container 3, thereby achieving a vacuum. The content liquid in the double container 3 can be agitated to eliminate the temperature difference between the bottom part and the middle part. Of course, in the case of a device having a function of circulating the content liquid by a circulation pump, or a device provided as the stirring means 49, a circulation pump may be driven instead of the electric pump 26. A circulating pump has the advantage that the content liquid can be circulated for a required time.
[0051]
In this case, it is preferable that the control board 27 be provided with a control mode for adjusting the display temperature, and in this mode setting, the agitation means 49 be operated to reduce the temperature unevenness of the content liquid. According to this, when the accuracy of the content liquid temperature is required or anxious, the user sets the display temperature optimizing mode, or when the dispensing operation is performed by the hot water supply key 46, the preliminary operation of dispensing. By automatically setting the mode, the optimizing operation can be automatically performed by the control function of the control board 27. The optimizing operation stirs and stirs the content liquid. The unevenness is eliminated, and the temperature detected by the temperature sensor 29 and the display temperature based thereon are optimized, so that the user's distrust and inconvenience can be eliminated. It is preferable that such a display temperature optimization mode be stopped when the change in the detected temperature falls below a certain range, because it can be set within the error setting range of the content liquid temperature to be detected.
[0052]
【The invention's effect】
According to the electric hot water storage container of the present invention,At the bottomNo heatingMahobinWhen in the warm state, that is, when the convection of the content liquid is slow or does not occur, the control meansBottomThe temperature of the content liquid detected by the temperature sensor is corrected to the proper side that is uniquely determined by the temperature detection position of the temperature sensor, and the content liquid temperature can be displayed externally. The difference between the temperature of the contents and the temperature of the contents can be reduced to reduce the distrust and inconvenience. From the above, when the temperature detection position by the temperature sensor is at the bottom of the container, it is preferable that the detected temperature be corrected to the + side and displayed.
[0053]
Also, adjust the content liquid temperatureBecause it is displayed in stagesIt is normal that there is a difference from the content liquid temperature by the amount of the step, so that the user's awareness of the difference can be reduced and the control means does not heat the heater.When warming a warm bottleIs heated by heaterWhen boilingBy using the threshold value by switching to the threshold value, the stepwise display temperature can be corrected to an appropriate side, and the inconvenience to the user can be reduced.
[0059]
Also,Since the content liquid is agitated by the stirring means and aggressively stirred, it is possible to eliminate the temperature difference between each part of the content liquid and to minimize it. In particular, the user can set the display temperature optimization mode when the accuracy of the liquid temperature is required or anxious, or automatically set as the preliminary operation mode for dispensing when there is a dispensing operation. By doing so, it is possible to automatically perform the optimizing operation by the control means, the content liquid is agitated and agitated by the optimizing operation, so that the temperature unevenness is eliminated, and the temperature sensor is used. Since the detected temperature and the display temperature based thereon are optimized, it is possible to eliminate the user's distrust and inconvenience. In addition, the display temperature optimization mode is stopped when the change in the detected temperature falls below a certain range, and can be set within the error setting range of the content liquid temperature to be detected.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment as an electric pot according to the present invention.
FIG. 2 is a plan view of an operation panel of the electric pot of FIG. 1;
FIG. 3 is a graph showing changes in the bottom, middle, and upper portions of the content liquid temperature from the kettle of the electric pot of FIG. 1 to the heat retention at a selected temperature.
FIG. 4 is a flowchart illustrating an example in which a temperature display when heating by a heater is not performed is corrected for a case where heating is performed by a heater.
FIG. 5 is a graph showing a difference between a bottom temperature and a middle temperature in electric pots A to D of various types.
6 is a graph showing a difference between the bottom temperature and the middle temperature in the electric pots A to D when the room temperature is different from the case shown in FIG.
FIG. 7 shows an example of switching the threshold between α and β for the case of performing heating by a heater and the case of not performing heating between α and β when the temperature of the content liquid is displayed stepwise by upper and lower thresholds. 7 is a graph showing C in the case of, and C half in the case of a half amount state.
FIG. 8 is a flowchart illustrating an example of control in a case where a threshold value is switched in FIG. 7;
FIG. 9 is a graph showing an example of control in a case where the heater is operated at predetermined time intervals for a predetermined time to reduce the temperature difference when the heater is not heated.
[Explanation of symbols]
1 body
2 Exterior case
3 vacuum double container
3c Single bottom
4 inner cylinder
5 outer cylinder
11 heater
13 Lid
25 Discharge path
25d outlet
26 Electric pump
27 Control board
32 Operation panel
41 Insulation key
42 LCD display
49 Stirring means

Claims (3)

With a heat insulation structure, the temperature of the content liquid in the container that is heated by the heater at the bottom and is boiling and keeping the temperature is detected by the temperature sensor at the bottom , and the temperature of the content liquid is displayed outside based on the detected temperature. Electric hot water storage container
At the time of warming of a vacuum bottle that is not heated by a heater, the temperature detected by the temperature sensor is corrected to the appropriate side with a predetermined ratio or value corresponding to the warming of the vacuum bottle, and if not warmed, it is corrected. An electric hot water storage container comprising a control means for displaying the hot water without displaying the hot water. Electricity that has a heat insulation structure , detects the temperature of the content liquid in a container that is heated by a heater, is boiling water and keeps the temperature, with a temperature sensor at the bottom, and displays the temperature of the content liquid to the outside based on the detected temperature. In hot water storage containers,
The display of the liquid content temperature is performed step by step based on the upper and lower threshold values corresponding to each of the preset temperatures, and the threshold value is determined when the heater is being heated by the heater and when the warmed bottle is not heated by the heater. An electric hot water storage container characterized by comprising control means for switching between: The temperature of the content liquid in the container heated by the heater and heated or kept warm is detected by the temperature sensor at the bottom , and the content liquid temperature is displayed to the outside based on the detected temperature, and the content liquid is stirred. In an electric hot water storage container provided with stirring means,
It has a display temperature optimization mode.In this mode setting, it has control means to reduce the temperature unevenness of the content liquid by operating the stirring means.The display temperature optimization mode is used when the detected temperature changes below a certain range. An electric hot water storage container characterized by being stopped at:

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