JP4260143B2 - Electric pot - Google Patents

Description

  The present invention relates to an electric pot.

  This type of electric pot includes an inner container that contains liquid in the pot body, heating means for boiling and keeping the temperature of the liquid in the inner container, and temperature detecting means for detecting the temperature of the liquid in the inner container. And hot water supply means for supplying hot water to the liquid in the inner container. When the power is turned on or when a new liquid is stored (added) in the inner container, the boiling control by the heating means is executed, and then the heat retaining control is executed. In addition, a re-boiling control function for boiling again the liquid in the heat-retaining state by the heating means is mounted.

  In recent years, the outer peripheral part of the inner container has a vacuum double wall structure, or a vacuum double jacket having a cylindrical shape is disposed on the outer peripheral part of the inner container to improve the heat retaining performance, thereby heating means during the heat retaining control. An energy-saving type with reduced power consumption due to operation is also provided. These electric pots can realize energy saving sufficiently compared with the conventional one and have been evaluated, but this energy saving is further pursued.

  Prior art document information relating to the electric pot of the present invention includes the following.

JP 2002-186554 A JP 2004-350974 A

  Patent Document 1 describes an electric pot in which heating means for heating a liquid is disposed in the vicinity of a discharge port that is an outlet of a pumped-up pipe. In this electric pot, a large amount of liquid stored in the inner container is not heated, but only the liquid to be supplied with hot water is instantaneously heated to a desired temperature, thereby eliminating unnecessary power consumption and saving energy.

  However, in order to heat water at room temperature until it boils, it is necessary to reduce the amount of hot water supplied by a pump, which is a hot water supply means, and to make the flow rate very slow. For this reason, it takes a very long time for the user to obtain a desired amount of hot water, which is not practical. Moreover, if the heating amount by the heating means is increased, it is possible to shorten the time required for hot water supply. However, in this case, it does not always lead to energy saving, and hot water in the vicinity of a boiling temperature such as 90 ° C. It is very difficult to supply hot water.

  On the other hand, Patent Document 2 describes an electric pot in which the temperature control temperature in the heat retention control is lower than the heat retention temperature selected by the user. And in this electric pot, in the hot water supply control during the heat retention control, when the actual liquid temperature is lower than the designated heat retention temperature selected by the user, the hot water is supplied after the operation of the heating means, accompanied by a temperature raising operation. It is configured to supply hot water.

  However, in the heating at the time of hot water supply, the temperature of all the liquid in the inner container is raised as in the normal boiling control and heat retention control, so that it cannot be said that energy saving is necessarily achieved. In addition, when the temperature difference between the actual liquid temperature and the designated heat retention temperature is large, a long heating time is required until it becomes possible to supply hot water at a temperature desired by the user, which is also not practical.

  An object of the present invention is to provide an electric pot capable of quickly supplying hot water at a temperature desired by a user and capable of reliably saving energy.

In order to solve the above problems, an electric pot according to the present invention includes an inner container for storing a liquid, a heating means for heating the liquid in the inner container, a temperature detecting means for detecting the temperature in the inner container, A hot water supply means having a pumping pipe for supplying hot water in the inner container from the upper discharge port, a hot water supply switch for performing hot water operation of the liquid in the inner container, and an unlocking switch for allowing operation of the hot water switch. And the heating means performs boiling control for heating the liquid in the inner container, and then in the electric pot for performing heat retention control for keeping the temperature at a preset designated heat retention temperature, the liquid to be supplied to the pumped water pipe A reheating means for hot water supply to be heated is provided, and in the heat retention control, the heating means keeps the temperature at a low set temperature lower than the designated heat retention temperature, and the hot water reheating means is operated at the time of hot water supply. Ri, and so as to hot-water supply the liquid in the specified retained temperature near, when the heating control by reheating means for said hot water supply starts by detecting the operation of the unlock switch, detects the operation of the hot water supply switch The heating control is continued while the heating control is stopped when the operation of the hot water supply switch is not detected for a predetermined time or longer .

In this type of electric pot, the heat retention control time is generally much longer than the boiling control time. And according to this invention, since it heat-retains by the low setting heat retention temperature lower than designation | designated heat retention temperature by this heat retention control, power consumption can be reduced and significant energy saving can be aimed at. And, during hot water supply during this heat retention control, the reheating means for hot water supply provided in the pumping pipe is operated to reheat, so that it is possible to reliably raise the temperature of the necessary hot water supply to the vicinity of the designated heat retention temperature and supply hot water. it can. Therefore, the convenience in use does not greatly change compared to the conventional electric pot, and it is possible to prevent the user from feeling uncomfortable. In addition, the heating control by the hot water reheating means is started by detecting the operation of the lock release switch, and is stopped when the operation of the hot water switch is not detected continuously for a predetermined time or longer. Further, it is possible to prevent wasteful heating standby time from being reduced, and to prevent the liquid having a temperature lower than the specified heat retention temperature from being supplied, and to prevent wasteful heating by the reheating means for hot water supply.

In this electric pot, it is preferable to adjust the energization rate of the reheating means for hot water supply or the amount of hot water supply of the hot water supply means based on the designated heat retention temperature and the temperature detected by the temperature detection means.
Further, hot water supply temperature detection means for detecting the temperature of the hot water supply liquid is disposed downstream of the hot water supply reheating means in the pumping pipe, and is based on the designated heat retention temperature and the temperature detected by the hot water supply temperature detection means. Thus, it is preferable to adjust the energization rate of the hot water supply reheating means or the hot water supply amount of the hot water supply means.
If it does in this way, the liquid of the user's designated heat retention temperature can be reliably supplied.

In addition, when hot water is supplied to the liquid in the inner container during the heat retention control, it is preferable that after the heating by the hot water reheating means is started, the hot water supply operation by the hot water supplying means is started after a predetermined waiting time.
In this case, in order to prevent the user from feeling uncomfortable, it is preferable to provide an informing means for informing that heating is being performed during the waiting time.
If it does in this way, it can prevent that the liquid lower than the designated heat retention temperature is supplied at the time of hot water supply start.

Furthermore, it is preferable that the low set temperature is set based on a heating amount by the hot water supply reheating means and a hot water supply amount by the hot water supply means.
Furthermore, it is preferable to set a plurality of types of the specified heat retention temperatures and to make the difference between each of the specified heat retention temperatures and the low set heat retention temperature at which the temperature is actually maintained substantially constant.
In this way, the temperature can be raised to the designated heat retention temperature easily and reliably.

  In the boiling control, when the heating by the heating unit is stopped at a temperature near the foaming point of water and hot water is supplied within a predetermined time thereafter, the hot water reheating unit is preferably operated. In this way, since power consumption in boiling control can be reduced, further energy saving can be achieved. In addition, when hot water is supplied after completion of the boiling control, reheating is performed by the hot water reheating means, so that the boiling hot water can be reliably provided to the user. In addition, when performing hot water supply immediately after heating the liquid in the inner container to the vicinity of the boiling point, it is not possible to obtain the amount of hot water supply at the time of the heat retention control by the bubble cup, but by stopping the boiling control near the foaming point, The occurrence of such a problem can be prevented.

  Furthermore, it is preferable that the reheating means for hot water supply is a ceramic heater, and a heater temperature detecting means is disposed in the vicinity of the ceramic heater. In this way, it is possible to reliably and instantaneously heat the liquid to be supplied with hot water, and to reliably prevent failure due to emptying.

Moreover, it is preferable to arrange | position the said reheating means for hot water supply so that it may be located below the bottom of the said inner container. In this way, it is possible to prevent emptying regardless of the amount of liquid in the inner container, and it is possible to heat only the liquid that reliably supplies hot water.
Furthermore, it is preferable that a radiation preventing member for preventing radiation heat transfer is provided in the vicinity of the reheating means for hot water supply. If it does in this way, it can prevent reliably that the heat of the reheating means for hot water supply affects the components located in the vicinity.

In the electric pot of the present invention, the heat is kept at a low set temperature lower than the designated temperature in the heat control, so that significant energy saving can be achieved. In addition, during hot water supply during this heat retention control, hot water supply is instantaneously reheated to the desired temperature by the hot water reheating means provided in the pumping pipe, so it can be used with the same feeling as a conventional electric kettle. It is possible to prevent the user from feeling uncomfortable. In addition, the heating control by the hot water reheating means is started by detecting the operation of the lock release switch, and is stopped when the operation of the hot water switch is not detected continuously for a predetermined time or longer. Further, it is possible to prevent wasteful heating standby time from being reduced, and to prevent the liquid having a temperature lower than the specified heat retention temperature from being supplied, and to prevent wasteful heating by the reheating means for hot water supply.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an electric pot according to the present invention. The electric pot includes a pot body 10 and a lid body 11 that is rotatably attached to an upper portion of the pot body 10. Inside the pot body 10, an inner container 12 that stores water, which is a liquid, is disposed. The inner container 12 includes an inner cylinder 13 having a bottomed cylindrical shape, and an outer cylinder 14 having a cylindrical shape with upper and lower end openings disposed on the outer peripheral portion of the inner cylinder 13, and a heat insulating space 15 is provided on the outer peripheral portion. It has a vacuum double structure.

  A heater 16 is disposed at the bottom of the inner container 12 as a heating means for heating the liquid inside, and a first temperature detecting means for detecting the temperature of the liquid in the inner container 12 is provided. A thermistor 17 is provided. A control board (not shown) on which a power circuit, a microcomputer 45 and the like are mounted is disposed between the outer body of the pot body 10 and the inner container 12.

  A nose portion 18 projecting forward is formed on the front upper portion of the pot body 10, and a pumping pipe 19 for supplying hot water from the inner vessel 12 to the bottom of the inner vessel 12 is formed from the nose portion 18 to the bottom of the inner vessel 12. It is arranged. Specifically, the water pumping pipe 19 is bent from the lower end of the connecting portion 20 and joined to the bottom of the inner container 12 and extends toward the front side below the inner container 12. The bottom side continuous part 21, the pumping part 22 extended upwards toward the nose part 18 from the front-end | tip of this bottom side continuous part 21, and the discharge part 23 bent in the substantially U shape from the upper end of this pumping part 22 are provided. The discharge port 24 at the tip of the discharge part 23 is arranged so as to face the lower side from the nose part 18.

  A hot water supply pump 25 provided with an impeller for pumping liquid therein is interposed in the pumping pipe 19 so as to be located at a boundary portion between the connecting portion 20 and the bottom continuous portion 21. In this embodiment, reheating for hot water supply for reheating only the liquid to be supplied with hot water so as to be positioned between the hot water supply pump 25 and the discharge port 24 and below the bottom of the inner container 12. As a means, a reheat heater 26 is interposed. Specifically, the reheat heater 26 is a ceramic heater in which a water supply pipe 27 and a sheet-like heater body 26a are cast inside a ceramic block. A radiation preventing member 28 made of copper foil is disposed in the vicinity of the reheat heater 26 in order to prevent radiation heat transfer. Specifically, the radiation preventing member 28 surrounds the reheat heater 26 in order to prevent the pot body 10 from being affected by the exterior body and the main heater 26 and the first thermistor 17. It is provided to go.

  In the present embodiment, as the second temperature detection means (hot water supply temperature detection means) for detecting the actual liquid temperature to supply hot water, the second thermistor is provided in the pumping section 22 on the downstream side of the reheating heater 26 in the pumping pipe 19. 29 is arranged. Further, a third thermistor 30 is disposed on the outer peripheral portion of the reheat heater 26 as temperature detecting means for the reheat heater 26 in order to prevent the reheat heater 26 from being broken due to emptying.

  An operation panel 31 is disposed on the outer surface of the nose portion 18 and an operation board (not shown) is disposed behind the operation panel 31. The operation board is connected to the control board by a cable. Yes. As shown in FIG. 2, the operation panel 31 includes a hot water supply switch 32, a lock release switch 33, a reboiling switch 34, a saving timer switch 35, and a selection switch 36 around a central liquid crystal panel 37. is there. The liquid crystal panel 37 is a segment display system. In the center of the liquid crystal panel 37, there is a numerical display 38 for displaying the temperature of hot water in the inner container 12, a set time by a timer, and the amount of hot water during a hot water supply operation, A heat retention setting display unit 39 indicating the selected state is provided. “Off” means a vacuum heat retention setting. In addition, a water amount display unit 40 indicating the amount of remaining water in the inner container 12 is provided on the side (right side) of the liquid crystal panel 37. In addition, a boiling display unit 41 indicating that the boiling operation is being performed and a heat retention display unit 42 indicating that the warming operation is being performed are provided on the upper portion of the liquid crystal panel 37. An unlock display unit 43 is provided to indicate that it is inside. These display units 41 to 43 are all made of LEDs. And in this embodiment, the alerting | reporting display part 44 which consists of LED is provided in the lower part of the hot water supply switch 32 as an alerting | reporting means which alert | reports to a user that it is a reheating state in the standby state at the time of hot water supply.

  The control board is equipped with a microcomputer 45 as control means, and when the user operates the operation panel 31, the load parts are controlled according to a program set in advance according to the operated switches 32-36, and boiled. Control, re-boiling control and heat retention control are executed, and hot water supply control is executed. In the present embodiment, in the heat retention control, the temperature control temperature that is actually maintained (maintained) is set lower than the designated heat retention temperature on the surface that can be selected by the user in accordance with the operation of the selection switch 36 (low set heat retention temperature). is doing. In the hot water control accompanying the operation of the lock release switch 33 and the hot water switch 32, the reheating is performed when a predetermined time after the completion of the boiling control and when the actual liquid temperature is lower than the specified heat retaining temperature during the heat retaining control. The reheating control by the heater 26 is added and executed.

  Specifically, in the boiling control, the heater 16 is operated to heat the liquid in the inner container 12 to near the boiling temperature. When the hot water temperature rises to a preset heating off temperature, the heater 16 is turned on. It is turned off (stopped). In this embodiment, after stopping at a temperature near the foaming point of water (about 92 ° C.) where a large amount of bubbles start to be generated in the inner container 12, the boiling control is completed when a predetermined calcination timer elapses. It is set as the structure which outputs the notification sound which shows. The reboiling control is substantially the same as this boiling control.

  In the heat retention control, after the boiling control or reboiling control is completed, the heater 16 is subsequently turned on and off to keep the liquid in the inner container 12 at a predetermined temperature (temperature control). In this embodiment, as described above, the actual temperature control temperature maintained by the heater 16 is configured to be a low set temperature that is lower than the specified temperature selected by the user. This low set temperature is the reheating control during hot water supply, and the heating amount per unit time by the reheat heater 26 and the hot water supply pump so that the actual liquid temperature discharged from the discharge port 24 becomes substantially the specified heat holding temperature. 25 is set based on the amount of hot water supply per unit time. As shown in FIGS. 2 and 3, in the electric pot of this embodiment, three types of “98 ° C.”, “90 ° C.”, and “OFF” are preset as designated heat retention temperatures that can be selected by the user. . Of these, when 98 ° C. is the designated temperature, the inside of the inner container 12 is adjusted to a low set temperature of 90 ° C., and when 90 ° C. is the designated temperature, the inside of the inner container 12 is set to a low temperature of 82 ° C. The temperature is controlled by the temperature, and various temperature differences are substantially constant. Incidentally, in this embodiment, the temperature difference between the temperature at which heating is stopped and the boiling point in the boiling control is also constant. When the temperature of the liquid in the inner container 12 is adjusted by the heater 26, 18 W of electric power is consumed per unit time when the temperature is adjusted to 98 ° C., and 15 W is applied when the temperature is adjusted to 90 ° C. When consuming and adjusting the temperature to 82 ° C., 13 W of power is consumed.

  In the hot water supply control, the liquid in the inner container 12 is pumped by operating the hot water supply pump 25 when the hot water supply switch 32 is operated within a predetermined time (10 seconds) after the lock release switch 33 is operated. Hot water is supplied through the pipe 19. Further, when the operation of the hot water supply switch 32 is not detected continuously for a predetermined time or longer, the locked state in which hot water cannot be supplied even if the hot water supply switch 32 is operated is set. And when performing the reheating control mentioned later, according to the actual liquid temperature detected via the 1st thermistor 17, the waiting time for heating up the residual liquid in the pumping pipe 19 is set, When the lock release switch 33 is operated, the operation of the hot water supply pump 25 is started after the standby time has elapsed.

  The reheating control added to the hot water supply control is for raising the actual liquid temperature of the hot water supplied to a specified boiling temperature or a heat retaining temperature. As described above, the reheating control is performed after the boiling control is completed. It is executed during the time and during the heat control. In this reheating control, when the operation of the lock release switch 33 is detected, heating by the reheating heater 26 is started, and when the hot water supply switch 32 is not operated, the heating by the reheating heater 26 is stopped. At this time, the heating amount (energization rate) by the reheat heater 26 is set based on the designated heat retention temperature and the actual heat retention temperature detected via the first thermistor 17. Further, the heating amount by the reheat heater 26 is adjusted based on the actual hot water supply temperature detected via the second thermistor 29 and the specified heat retention temperature.

  Next, the control by the microcomputer 45 will be specifically described.

  First, when the user connects the power cord to the commercial power supply, the microcomputer 45 first executes the boiling process, and then executes the heat retaining process when the boiling process is completed. Further, when the operation of the reboiling switch 34 is detected during execution of the heat retention process, after the reboiling process is executed, the heat retention process is subsequently executed when the reboiling process is completed. Further, when the liquid temperature falls to a preset heating on temperature (77 ° C.) or lower during the heat retention process, the same boiling process is performed as described above. When the boiling process is completed, the heat retention process is subsequently performed. To do. Furthermore, in parallel with the boiling process, the heat retaining process, and the reboiling process, the input processes of the switches 32 to 36 are executed. And in the reheating process by the reheating heater 26 accompanying the hot water supply process, which is one of the input processes, the stop determination process for the reheating heater 26 is executed in parallel.

  First, in the boiling process, as shown in FIG. 4, the microcomputer 45 first turns on the boiling display unit 41 in step S <b> 1, and then, in step S <b> 2, a predetermined time elapses after the boiling control (process) is completed. 0 (not passed) is input to the flag indicating whether or not the Next, in step S3, the heater is turned on to start heating the liquid in the inner container 12, and then in step S4, the process waits until the liquid temperature in the inner container 12 rises to the off temperature (92 ° C.). . When the temperature is raised to the off temperature, in step S5, the heater 16 is turned off to stop heating, and in step S6, the calcination timer is reset and started. In step S7, the process waits until the timer counts up. When the timer counts up, in step S8, a notification indicating that the boiling process is completed is performed, and the process proceeds to a heat retaining process.

  The re-boiling process is different from the boiling process only in the setting time of the chalk removal timer.

  Next, in the heat retaining process, as shown in FIG. 5, the microcomputer 45 first turns off the boiling display unit 41 and turns on the heat retaining display unit 42 in step S10, and then sets a boiling maintenance timer in step S11. Reset and start. Here, this boiling maintenance timer measures the time after the end of the boiling process or reboiling process in order to change the information of the flag f. In the present embodiment, the predetermined time after the completion is a time (10 minutes) during which the hot water heated to the boiling point is cooled to 98 ° C., which is a high designated heat retention temperature.

  Next, in step S12, it is detected whether or not the boiling maintenance timer has counted up. If it has been counted up, the process proceeds to step S13. After the boiling maintenance timer is stopped, in step S14, the flag f is stored in order to store that a predetermined time has elapsed after completion of the boiling process or reboiling process. Enter 1 and go to step S15. On the other hand, if the boiling maintenance timer has not counted up in step S12, the process skips steps S13 and S14 and proceeds to step S15.

  In step S15, after reading the heat retention condition (low set heat retention temperature) based on the designated heat retention temperature by the user's operation of the selection switch 36, in step S16, the actual liquid temperature in the inner container 12 via the first thermistor 17 is read. (T) is detected. The liquid temperature may be detected every predetermined time.

  Next, in step S17, it is determined whether or not the detected liquid temperature (T) is higher than a boiling control execution temperature that is a first threshold value for executing the boiling control. If the liquid temperature (T) is higher than the boiling control execution temperature, the process proceeds to step S18. If the liquid temperature (T) is equal to or lower than the boiling control execution temperature, the process proceeds to boiling control.

  In step S18, it is determined whether or not the detected liquid temperature (T) is lower than a heating execution temperature that is a second threshold value for turning on the heater 16. If the liquid temperature (T) is lower than the heating execution temperature, the process proceeds to step S19, the heater 16 is turned on, and the process proceeds to step S22. On the other hand, if the liquid temperature (T) is equal to or higher than the heating execution temperature, the process proceeds to step S20.

  In step S20, it is determined whether or not the detected liquid temperature (T) is higher than a heating stop temperature that is a third threshold value for turning off the heater 16. If the liquid temperature (T) is higher than the heating stop temperature, the process proceeds to step S21, the heater 16 is turned off, and the process proceeds to step S22. On the other hand, when the liquid temperature (T) is equal to or lower than the heating stop temperature, the process directly proceeds to step S22.

  In step S22, it is detected whether or not the designated heat retention temperature has been changed by operating the selection switch 36. And when the change of designated heat retention temperature is detected, it returns to step S15 and reads heat retention conditions. On the other hand, when the change of the designated heat retention temperature is not detected, the process proceeds to step S23.

  In step S23, it is detected whether or not execution of reboil control is requested by operating the reboil switch 34. And when the execution request | requirement of reboil control is detected, it transfers to a reboil process. On the other hand, when the execution request for the reboiling control is not detected, the process proceeds to step S24, where it is detected whether or not a predetermined time has elapsed after the completion of the boiling process or the reboiling process by using the flag f. If not, the process returns to step S12. If f is 1 (elapsed), the process returns to step S16.

  Among the switch input processes operated in parallel with the above processes, in the unlocking process, the microcomputer 45 first turns on the unlocking display unit 43 in step S30 as shown in FIG. In S31, the lock timer is reset and started. Next, in step S32, it is determined whether or not a predetermined time has elapsed after completion of the boiling process or re-boiling process. It is determined whether or not 1 is input to the flag f, and f is 1 (elapsed). If there is, the process proceeds to step S33, and if f is 0 (not elapsed), the process proceeds to step S34.

  In step S33, it is determined whether or not the designated warming temperature is higher than the current warming temperature. If the designated warming temperature is higher, the process proceeds to step S34. If the designated warming temperature is lower, the process proceeds to step S36. .

  In step S34, after the energization setting process of the reheat heater 26 is executed, the reheat heater 26 is turned on (energization is started) in step S35, and the process proceeds to step S36. Here, the reheat heater energization setting process is set such that when f is 0, the reheat heater 26 is energized with full power so that the hot water to be supplied has a boiling temperature. Further, when f is 1, the initial energization ratio to the reheat heater 26 is set based on the actual liquid temperature in the inner container 12 so that the hot water to be supplied becomes a temperature in the vicinity of the designated heat retention temperature. To do. Further, a minimum standby time is set in order to bring the liquid remaining in the pumping pipe 19 close to the target hot water supply temperature. The energization rate includes both a change in the percentage of power supplied to the reheating heater 26 and a change in energization time by on / off control.

  Next, in step S36, if an operation of the hot water supply switch 32 is detected, the process proceeds to step S37. After performing a hot water supply process described later, in step S38, the lock timer is reset and restarted, and the process proceeds to step S39. On the other hand, if the operation of the hot water supply switch 32 is not detected in step S36, the process proceeds to step S39 as it is.

  In step S39, it is detected whether or not the lock timer being measured has been counted up (10 seconds). If the count is up, the process proceeds to step S40, the lock release display unit 43 is turned off, and the reheat heater 26 is turned off (energization is stopped) in step S41, and the process returns. On the other hand, if the lock timer has not counted up, the process returns to step S36.

  When energization of the reheat heater 26 is started in step S35, the emptying of the reheat heater 26 is detected via the third thermistor 30 until the energization of the reheat heater 26 is stopped in step S41. If detected, stop determination processing for stopping energization is executed in parallel.

  Moreover, in the hot water supply process of step S37, as shown in FIG. 7, the microcomputer 45 first detects whether or not the standby time set in step S34 has elapsed in step S37-1, and has not elapsed. In this case, the process proceeds to step S37-2, the notification display unit 44 that displays that the hot water supply is being heated is turned on, and the process returns to step S37-1. On the other hand, if the standby time has elapsed, the process proceeds to step S37-3, the notification display unit 44 is turned off, and the process proceeds to step S37-4.

  In step S37-4, the hot water supply pump 25 is turned on to start the hot water supply operation, and then in step S37-5, it is detected whether or not the operation of the hot water supply switch 32 by the user is stopped. And when operation stop is detected, it progresses to step S37-6, turns off the hot water supply pump 25, stops hot water supply operation, and returns. On the other hand, when the stop of the hot water supply operation is not detected, the process proceeds to step S37-7.

  In step S37-7, after the actual hot water supply temperature is detected by the second thermistor 29, in step S37-8, an energization adjustment process of the reheat heater 26 in operation is executed, and the process returns to step S37-5.

  As described above, in the electric pot of the present invention, in the heat retention control, the temperature is kept at a low set temperature lower than the designated temperature on the surface displayed on the operation panel 31. And in this kind of electric pot, generally heat insulation control time is very long compared with boiling control time. That is, by lowering the heat retention temperature in the heat retention control that occupies most of the electric pot, power consumption can be reduced and significant energy saving can be achieved.

  And during hot water supply during this heat retention control, the reheat heater 26 provided in the pumping pipe 19 is operated and reheated, so that only the necessary hot water supply can be reliably heated up to the vicinity of the designated heat retention temperature to supply hot water. it can. Therefore, the convenience in use does not greatly change as compared with the conventional electric pot, and it is possible to prevent the user from feeling uncomfortable in actual usage. Moreover, in this reheating at the time of hot water supply, compared to the case where the heater 16 for heating the liquid in the inner container 12 is used, only the hot water supply can be heated, so that power consumption and heating efficiency can be greatly improved. It is possible to reliably save energy.

  In addition, during the hot water heating, the energization rate of the reheat heater 26 is set based on the designated heat retention temperature and the actual liquid temperature in the inner container 12. Further, the energization rate of the reheat heater 26 is further adjusted based on the actual hot water supply temperature at the time of hot water supply. Therefore, it is possible to reliably supply hot water at a specified heat retention temperature set by the user. Moreover, since the hot water supply operation is started after a predetermined waiting time at the start of the hot water supply, it is possible to prevent the liquid having a temperature lower than the designated heat retention temperature from being supplied. In addition, during the waiting time, the notification display unit 44 that displays that the heating is in progress is turned on, so that it is possible to prevent the user from feeling uncomfortable due to the fact that the hot water is not supplied despite the hot water supply operation. .

  Furthermore, since the low set heat retention temperature is set based on the heating amount by the reheating heater 26 and the hot water supply amount by the hot water supply pump 25, the temperature can be raised to the specified heat retention temperature at the time of hot water supply. In addition, since the temperature difference between the pair of low set heat retention temperatures is constant with respect to a plurality of types of designated heat retention temperatures, it is not necessary to adjust the power supplied to the reheat heater 26 for each designated heat retention temperature. Therefore, the circuit configuration of the control board mounted on the electric pot can be simplified, and the control program can be simplified. In addition, the life of the reheat heater 26 can be extended.

  Furthermore, in this embodiment, since the reheating heater 26 capable of raising the hot water supply temperature is provided, it is not necessary to perform the heating temperature by the heater 16 to the boiling point even in the boiling control. For this reason, it is possible to reduce power consumption in the boiling control and to further save energy. In the present embodiment, the heater 16 that is heated through the inner container 12 is heated up to the vicinity of the foaming point, and is reheated by the reheat heater 26 at the time of hot water supply, so that the temperature is reliably raised to the boiling point. Can supply hot water. Moreover, in this boiling control, since the heating is performed up to the vicinity of the foaming point, even if the user performs hot water supply immediately after the completion of the boiling control, it is impossible to obtain the same amount of hot water supply as that at the time of heat retention due to the foam bite. You can prevent problems. That is, when hot water is supplied immediately after the liquid in the inner container 12 is heated to the vicinity of the boiling point, it is not possible to obtain the amount of hot water as in the heat retention control by the bubble cup, but by stopping the boiling control near the foaming point. The occurrence of such a problem can be prevented.

  Since the reheat heater 26 uses a ceramic heater, the liquid to be supplied can be heated reliably and instantaneously. In addition, the reheat heater 26 is disposed below the inner container 12 to reliably prevent emptying in the state where the liquid is stored in the inner container 12, and the third thermistor 30 is provided. By disposing it, it is possible to reliably prevent a failure due to flying.

  Moreover, by detecting the operation of the lock release switch 33, the hot water supply lock is released and the reheating by the reheating heater 26 is started, and the reheating by the reheating heater 26 is stopped when the hot water supply is locked. Wasteful heating standby time can be reduced, and wasteful heating (power consumption) due to reheating can be prevented.

  In addition, the electric pot of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, in the above-described embodiment, the energization rate by the reheat heater 26 is changed based on the designated heat retention temperature and the actual liquid temperature in the inner container 12 and based on the actual hot water supply temperature. The energization rate may be constant, and the amount of hot water supplied by the hot water supply pump 25 may be changed.

  Further, the on / off control of the reheating heater 26 is interlocked with the unlocking and locking of the hot water supply switch 32 based on the operation of the lock release switch 33, but may be interlocked with the operation of the hot water supply switch 32.

  Further, in the above embodiment, the dedicated third thermistor 30 is provided to detect the heating temperature of the reheat heater 26, but the second thermistor 29 for detecting the hot water supply temperature is disposed in the vicinity of the heater 26, The second thermistor 29 may also be used.

It is a schematic sectional drawing which shows the electric pot of embodiment which concerns on this invention. It is a block diagram which shows the structure of the electric pot containing an operation panel. It is a graph which shows the specific example of designated heat retention temperature and low setting heat retention temperature. It is a flowchart which shows the boiling process by a microcomputer. It is a flowchart which shows the heat retention process by a microcomputer. It is a flowchart which shows the lock release process by a microcomputer. It is a flowchart which shows the hot water supply process by a microcomputer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Pot main body 11 ... Cover body 12 ... Inner container 16 ... Heating heater (heating means)
17 ... 1st thermistor (temperature detection means)
19 ... Pumping pipe 24 ... Discharge port 25 ... Hot water supply pump (hot water supply means)
26 ... Reheating heater (reheating means for hot water supply)
29 ... Second thermistor (temperature detection means)
30 ... Third thermistor (temperature detection means)
DESCRIPTION OF SYMBOLS 31 ... Operation panel 32 ... Hot-water supply switch 33 ... Lock release switch 37 ... Liquid crystal panel 44 ... Notification display part 45 ... Microcomputer (control means)

Claims (11)

An inner container for storing the liquid; heating means for heating the liquid in the inner container; temperature detecting means for detecting the temperature in the inner container; and pumping water for supplying hot water to the liquid in the inner container from the upper discharge port A hot water supply means having a tube, a hot water switch for hot water operation of the liquid in the inner container, and a lock release switch that allows the hot water switch to be operated, and the heating means allows the liquid in the inner container to be In the electric pot that executes the heat retention control for keeping the temperature at the preset designated heat retention temperature after performing the boiling control for heating,
Interposing a reheating means for hot water supply for heating the liquid to be supplied to the pumped water pipe,
Wherein in heat retaining control, the incubation at lower than the specified retained temperature low setting retained temperature by a heating means, by the time the hot water supply to operate the reheating means for said hot water supply, and so as to hot-water supply the liquid in the specified retained temperature near ,
Heating control by the hot water supply reheating means is started by detecting an operation of a lock release switch, and when the operation of the hot water supply switch is detected, the heating control is continued, while the hot water supply is continued for a predetermined time or more. An electric pot characterized in that heating control is stopped when switch operation is not detected .   2. The electricity according to claim 1, wherein an energization rate of the reheating means for hot water supply or a hot water supply amount of the hot water supply means is adjusted based on the designated heat retention temperature and the temperature detected by the temperature detection means. pot.   On the downstream side of the reheating means for hot water supply in the pumped water pipe, hot water supply temperature detection means for detecting the temperature of the liquid to be supplied with hot water is disposed, and based on the designated heat retention temperature and the temperature detected by the hot water supply temperature detection means, The electric kettle according to claim 1 or 2, wherein an electricity supply rate of the reheating means for hot water supply or a hot water supply amount of the hot water supply means is adjusted.   The hot water supply operation by the hot water supply means is started after a predetermined waiting time after heating by the reheating means for hot water supply is started at the time of hot water supply of the liquid in the inner container during the heat retention control. The electric pot according to any one of claims 1 to 3.   The electric pot according to claim 4, further comprising an informing means for informing that heating is being performed during the waiting time.   The electric pot according to any one of claims 1 to 5, wherein the low preset temperature is set based on a heating amount by the hot water supply reheating means and a hot water supply amount by the hot water supply means.   7. A plurality of the specified heat retention temperatures are set, and a difference between each of the specified heat retention temperatures and a low heat retention temperature that is actually retained is substantially constant. Electric pot as described in.   The said boiling control stops the heating by the said heating means at the temperature of the foaming point vicinity of water, and when supplying hot water within the predetermined time after that, the said reheating means for hot water supply is operated. The electric pot according to claim 7.   The electric pot according to any one of claims 1 to 8, wherein the reheating means for hot water supply is a ceramic heater, and heater temperature detecting means is disposed in the vicinity of the ceramic heater. The electric pot according to any one of claims 1 to 9 , wherein the reheating means for hot water supply is disposed so as to be positioned below the bottom of the inner container. The electric pot according to any one of claims 1 to 10 , wherein a radiation preventing member for preventing radiation heat transfer is disposed in the vicinity of the reheating means for hot water supply.

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