JP5176580B2 - an electronic pot - Google Patents

Description

  The present invention relates to an electric pot having a reboiling control function such as a feed water boiling control.

  In the electric pot, when the water (tap water) in the inner container is first heated (during normal boiling control), for example, as shown in the flowchart of FIG. 6 and the time chart of FIG. The normal boiling control is started by turning on (step S1), and after boiling detection (step S2) is performed, the boiling point temperature is stored (step S3) and the heat retaining process is started (step S4). . In this case, it takes about 1 to 2 minutes for the steam to come out before boiling.

  By the way, in the heat-retaining state, even if it is kept at a high temperature, it is about 90 ° C. If hot water in a boiling state (100 ° C.) is desired, the re-boiling key is pressed to re-boil. In this case, the hot water in the heat-retained state has been decarburized first, so that it is not necessary to discharge steam after boiling.

  Therefore, in the conventional electric pot, in order to reduce the power consumption at the time of such re-boiling heating, first, the boiling point at the time of boiling water (temperature lower by 1 to 2 ° C. than 100 ° C.) is stored in the storage means. The memorized boiling point is used for boiling determination at the next re-boiling to prevent excessive heating after boiling (so-called saving re-boiling control) (for example, Patent Document 1). See).

  In addition, when the amount of hot water in the heat insulation state decreases, water is added into the inner container.However, in recent electric pots, when water is added in the heat insulation state, the water temperature in the inner container decreases, and the degree of decrease in the water temperature is the temperature. Re-boiling control (feed water boiling control) is automatically performed by the feed water boiling control means detected by the sensor.

  And even in this re-boiling control by adding water, the boiling water used in the above-mentioned saving re-boiling control or the like for the purpose of removing the chlorine because the added water contains a chlorine component. Since the boiling point was detected without using the judgment temperature as in the first normal boiling control (see steps S5 → S6 → S1 → S2 → S3 in FIG. 6), steam for about 1 to 2 minutes Was out.

JP-A-8-196425 (pages 1-8, FIGS. 1-9)

  However, when water (tap water) is added to the above hot water, the amount of the chlorine component contained in the total amount of water is less than the amount of the salt component contained in the first boiling when the total amount is the same. If the normal boiling control is performed at the time of adding water as in the conventional case as in the conventional case, the steam discharge time T1 becomes longer than necessary as shown in FIG. As described above, when the steam discharge time for removing the chlorine becomes longer than necessary, there is a problem that extra power is consumed.

  Accordingly, the present invention aims to provide an electric pot that can reduce the power consumption during re-boiling control when adding water in the above-described heat-retaining state as much as possible. It is.

  The present invention includes the following problem solving means in order to solve the above conventional problems and achieve the object.

(1) Invention of Claim 1 of the Application The invention of claim 1 of the present application is to keep the inner container, a water heater for boiling the water in the inner container, and the water in the inner container at a predetermined temperature after boiling. A heat retaining heater, a temperature sensor for detecting the temperature of the water in the inner container, a hot water control means for controlling the energization of the heaters to boil the water in the inner container, and the hot water heated A temperature control means for maintaining the temperature at a predetermined temperature, a boiling determination means for determining the boiling of the water in the inner container when boiling, and the temperature of the water when the boiling determination means determines to boil as the boiling point A boiling point temperature storage means, and a re-boiling control means for performing re-boiling control by energizing the water heater and the heat-retaining heater in the heat-retaining state, and the boiling point stored in the boiling-point temperature storage means at the next re-boiling time Use for boiling judgment The re-boiling control means turns off the heat retaining heater when the boiling judgment means judges that it is boiling, and at the judgment time point, the electric pot is configured to avoid excessive heating after boiling. After the elapse of a predetermined continuous heating time, the water heater is turned off and the process returns to the heat retaining process.

  According to the first aspect of the present invention, the boiling point temperature determined by the boiling determining means during the initial boiling water control is stored in the boiling temperature storage means, and the energization control to the hot water heater and the heat retaining heater is performed by the reboiling control means. When the temperature sensor detects the boiling point temperature stored in the same boiling point temperature storage means, the heat insulation heater is turned off, and after that, the water heater is heated and heated only with the heater, and the predetermined continuous heating time only with the same water heater is set. After the elapse of time, the water heater is turned off to return to the heat retaining process.

  For example, water boiling control when adding water, etc., only releases the chlorine component (the total amount of the calcium component is less than that of fresh water) contained in the added water after boiling. Well, therefore, the energization time to the water heater at the time of re-boiling control is continuously shortened shorter than the steam discharge time (about 1 to 2 minutes from the start of steam discharge to the boiling point detection) in the normal water heater control from the water state. Even when the heating time is set (for example, 40 seconds from the boiling determination time), the remaining chalk component can be sufficiently released.

  Then, at the time of boiling judgment, first, the heat retaining heater is turned off, and from the boiling judgment time point, if only the heater is heated and heated only for the predetermined continuous heating time, the power required for the heating is reduced by that amount, and the total The heating time can be shortened.

(2) Invention of claim 2 of the present application The invention of claim 2 of the present application is to keep the inner container, a water heater for boiling the water in the inner container, and the water in the inner container at a predetermined temperature after boiling. A heat retaining heater, a temperature sensor for detecting the temperature of the water in the inner container, a hot water control means for controlling the energization of the heaters to boil the water in the inner container, and the hot water heated A temperature control means for maintaining the temperature at a predetermined temperature, a boiling determination means for determining the boiling of the water in the inner container when boiling, and the temperature of the water when the boiling determination means determines to boil as the boiling point Boiling temperature storage means, and water boiling control means for conducting reboiling control by energizing the hot water heater and the heat insulation heater when water is added in the heat retention state, and stored in the boiling temperature storage means Boiling point next time boil An electric pot configured to avoid excessive heating after boiling by being used for boiling determination of the water supply, wherein the feed water boiling control means uses the heat retaining heater when the boiling determination means determines that it is boiling. The heater is turned off, and after a predetermined continuous heating time has elapsed from the determination time point, the water heater is turned off to return to the heat retaining step.

  In the second aspect of the invention, in the automatic reboiling heating at the time of adding water, both the water heater and the heat retaining heater are used until the temperature detected by the temperature sensor reaches the boiling point temperature stored in the boiling point temperature storage means. By heating, the water can be boiled in a short time.

  Also, when the temperature detected by the temperature sensor reaches the boiling point temperature, the heat retaining heater is turned off, and then the water heater is heated and heated only with the heater (heat retaining heater is turned off). Since the boiling point has been reached, sufficient steam can be discharged (dechlorinated).

  As described above, even when water is added, if the heat retaining heater is turned off after reaching the boiling point temperature and heated only by the water heater, the power consumption is reduced by the amount that the heat retaining heater does not generate heat.

  In the present invention, as described above, even during re-boiling control such as when adding water, the chlorine component contained in the added water can be sufficiently released, and the time required for removing the chalk can also be shortened. It becomes like this.

  Therefore, at the time of re-boiling control such as when water is added, there is a beneficial effect that power consumption can be reduced as much as possible while sufficiently securing a decoloring function.

  Hereinafter, an electric pot according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  First, FIG. 1 is an overall longitudinal sectional view of the electric pot, FIG. 2 is a plan view of the electric pot, FIG. 3 is a block diagram of a control device portion of the electric pot, and FIG. 4 is an operation flowchart of the control device of the electric pot. FIG. 5 is a graph showing changes in the hot water temperature in the inner container 3 and the steam temperature at the steam outlet at the time of re-boiling control when adding water.

  First, the configuration of the main body portion and the control device portion of the electric pot according to the embodiment of the present invention will be described.

(Configuration of the electric pot body)
The electric pot shown in FIGS. 1 and 2 includes a container body 1 having an inner container 3 for storing hot water, a lid body 2 that opens and closes an upper opening of the container body 1, and when the inner container 3 is heated. A water heater 4A that is a heating means for heating, a heat retaining heater 4B that is a heating means for heating the inner container 3 at the time of heat retention, and a hot water supply passage (hot water) for pouring hot water in the inner container 3 to the outside. (Pouring passage) 5, a flow rate sensor 80 for measuring a pouring flow rate provided in the middle of the hot water supply passage 5, and the inner container 3 through the hot water supply passage 5 in a state where an AC power source is connected. An electric hot water supply pump 6 for pouring hot water to the outside, and an air-type manual hot water supply pump 18 for sending hot water in the inner container 3 to the outside through the hot water supply passage 5 in a state where an AC power source is not connected. It is prepared for.

  The said container main body 1 couple | bonds integrally the cylindrical outer case 7 made from a synthetic resin which comprises an outer side surface part, the said inner container 3 which comprises an inner side part, and the said outer case 7 and the inner container 3 on the upper side. It consists of an annular shoulder member 8 made of synthetic resin to be fixed and a dish-shaped bottom member 9 made of synthetic resin that constitutes the bottom surface portion.

  The inner container 3 is a heat insulating material having a vacuum double wall structure with a high heat insulation performance in which a vacuum heat insulating space is provided between a stainless steel bottomed cylindrical inner cylinder 10 and a stainless steel cylindrical outer cylinder 11. It consists of a structure, and the single plate part 3a comprised only by the bottom face part of the said inner cylinder 10 except the outer peripheral part is formed in the bottom part. The single plate portion 3a is formed so as to protrude slightly upward. On the lower surface side thereof, the water heater 4A and the heat retaining heater 4B (for example, two sets of heating elements having different wattages are held on the mica plate). A mica heater is attached.

  A small-diameter water supply port 3b having a heat keeping structure is formed at the upper end portion of the inner container 3 by drawing the upper end portion on the inner cylinder 10 side toward the central axis direction. Reference numeral 12 denotes a temperature sensor that detects the temperature of the inner container 3 (in other words, the temperature of hot water in the inner container 3), and is a thermistor. The temperature sensor 12 is attached to the center of the bottom surface of the bottom of the inner container 3. Further, reference numeral 13 denotes a convex full water level display portion that displays the full water level of the inner container 3.

  The lid 2 includes a synthetic resin upper plate 14 and a synthetic resin lower plate 15 having an outer peripheral edge coupled to the upper plate 14, and is provided at the rear portion of the shoulder member 8. The hinge receiver 16 is supported by a hinge pin 17 so that it can be opened and closed in a vertical direction and is detachable.

  The lid 2 is provided with an air-type manual hot water supply pump 18 that is compressed by a manual pressing operation so that hot water can be supplied to the outside through the hot water supply passage 5 even when an AC power source is not connected. It is installed. The manual hot water supply pump 18 is of a bellows type disposed in a cylindrical portion 19 formed at a substantially central portion of the lid 2, and has a bellows structure via a pressing cover 20A and a pressing plate 20B. By pressing the bellows 20C downward, the pressurized air 20D in the bellows 20C is blown into the inner container 3 through the air blowing port, and the hot water in the inner container 3 is supplied with hot water by the pressure of the pressurized air. It is pushed out through the passage 5. 20E is a restoring spring upward of the bellows 20C, and 15A is a bellows support plate on the lower plate 15 side. Reference numerals 21a to 21d denote steam discharge passages of the lid body 2 that are in communication with each other from below to above, and a reference numeral 21d portion on the upper surface of the lid body 2 serves as a steam vent. Reference numeral 22 denotes an overturn stop water valve disposed in the middle of the steam discharge passages 21a to 21d on the steam outlet 21a side.

  A metal inner cover member 23 is fixed to the lower surface of the lower plate 15 in the lid 2, and the inner container 3 is attached to the outer peripheral edge of the inner cover member 23 when the lid 2 is closed. A heat-resistant rubber seal packing 24 is provided in pressure contact with the upper surface of the water supply port 3b.

  At the lower position of the inner container 3 on the upstream end side of the hot water supply passage 5, for example, a shaft seal type DC electric hot water supply pump is provided via the inner container 3 side hot water introduction cylinder 6a and the hot water supply pump side hot water inlet 6b. In this hot water supply passage 5, hot water sucked from the hot water suction port 6 b through the hot water introducing cylinder 6 a is discharged from the discharge port 6 c by the pumping action of the electric hot water supply pump 6. Then, after passing through the lower connecting portion 5a and the straight pipe portion 5b of the hot water supply passage 5, the water flows through the flow rate detection passage in the flow rate sensor 80 and is led to the hot water pouring outlet 5d from the overturn stop valve side connecting pipe 5c.

  On the other hand, reference numeral 35 is an operation panel unit having an operation surface of various switches described later and a display surface of a liquid crystal display unit, and 51a is a microcomputer control unit 70 (FIG. 3) and various switches 38 to 43 described below (FIG. 2). ), A microcomputer board provided with a liquid crystal display device (drive unit), 51 is a support member for the liquid crystal display unit 47, 50 is a drive circuit for the electric hot water supply pump 6, a heating control circuit for the water heater 4A, and the heat retaining heater 4B, It is a power supply board provided with a stabilized DC power supply circuit and the like.

  On the operation panel 35 (FIG. 2), the ON operation of the hot water supply switch 38 and the hot water supply switch 38 which are driven by turning on the drive motor 61 (FIG. 1) of the hot water supply pump 6 by the ON operation is timer-locked. , A hot water lock release switch 39 for releasing the lock state by an ON operation, a reboil / warm selection switch 40, a good night timer switch 41, up / down switches 42 and 43 for setting a hot water amount when a fixed hot water supply mode is selected, and a reboil display An LED 44, a heat retention operation display LED 45, a hot water supply unlock display LED 46, a liquid crystal display unit 47, and the like are provided.

  The liquid crystal display unit 47 is provided with, for example, a time / time / hot water / operating state combined display unit 47a, a heat retention set temperature display unit 47b, a magic bottle heat retention display unit 47c, and various convenient information displays. Has been made.

(Configuration of control unit)
FIG. 3 is a block diagram showing a control device for boiling water in the electric pot body configured as described above. The control device shown in FIG. 3 includes a hot water control means 71 for controlling the energization of the water heater 4A and the heat retaining heater 4B to boil the water in the inner container 3, and a predetermined heat retaining temperature for the hot water. The temperature control means 72 for maintaining the temperature of the water, and the boiling that determines that the water in the inner container 3 has boiled when the temperature rise of the water in the inner container 3 detected by the temperature sensor 12 when boiling is below a predetermined value. Determination means 73, boiling point storage means 74 for storing the temperature when boiling determination means 73 determines boiling, as a boiling point, and temperature sensor 12 detects a low temperature below a predetermined temperature by adding water in a heat retaining state. Water supply boiling control means 75 for performing control to energize the heater 4A and the heat retaining heater 4B and re-boil the water, and a microcomputer controller for controlling each of the means 71 to 75 Has a 0 and.

  The hot water control means 71 receives a command signal from the microcomputer controller 70 and controls the hot water heater 4A and the heat retaining heater 4B to generate heat. At the time of boiling water, as described later, the boiling water is heated by both the heater 4A and the heat retaining heater 4B until the boiling judgment means 73 judges boiling (the boiling time can be shortened).

  The heat retaining control means 72 receives a command signal from the microcomputer control unit 70 after boiling water, and keeps the hot water in the inner container 3 at a predetermined temperature by the heat retaining heater 4B. The temperature control by the temperature control means 72 can be performed at a plurality of temperatures such as 70 ° C., 80 ° C., 90 ° C., for example.

  The boiling determination means 73 determines that the water in the inner container 3 has boiled when the temperature rise degree of the water in the inner container 3 detected by the temperature sensor 12 when boiling water is below a predetermined value. Specifically, as shown by the symbol A in FIG. 4 or FIG. 5, the water temperature is initially C1 / Δt, and the temperature rise is C1 / Δt as shown by the symbol B in FIG. Thus, when it becomes below a predetermined value, it is judged that the water in the inner container 3 has boiled. The boiling judgment temperature by the boiling judgment means 73 is about 98.5 ° C., which is slightly lower than the actual boiling temperature 100 ° C. in this embodiment. The boiling determination temperature data from the boiling determination unit 73 is input to the microcomputer control unit 70.

  The boiling point temperature storage means 74 stores the temperature when the boiling determination means 73 determines boiling as the boiling point. In this embodiment, the boiling determination temperature 98.5 ° C. is stored.

  The feed water boiling control means 75 performs control for automatically re-boiling heating when the temperature sensor 12 detects a low temperature below a predetermined temperature within a predetermined time in the heat retention state. The automatic reboiling control by is mainly performed when water is added during heat insulation. That is, when the amount of hot water in the inner container 3 decreases and water is added to the inner container 3 (at time t0 in FIG. 5) during the heat insulation (for example, 90 ° C. heat insulation), the water temperature in the inner container 3 is increased. The temperature sensor 12 (FIG. 3) detects the degree of water temperature reduction at that time, and the microcomputer controller 70 operates the feed water boiling control means 75 based on the detection signal. It has become.

  As shown in FIG. 3, the water heater 4A generates heat when the water heater ON signal is output from the microcomputer control unit 70 to the water heater control means 71 or the feed water boiling control means 75, and the heat retaining heater 4B The controller 70 generates heat when a warming heater ON signal is output from the controller 70 to the hot water boiling control means 71, the warming control means 72, or the feed water boiling control means 75.

(Explanation of boiling and re-boiling control of this embodiment)
Next, with reference to FIGS. 4 to 6, the hot water boiling control of the electric pot according to this embodiment and the feed water boiling control when water is added after shifting to the heat retaining process will be described.

  First, FIG. 4 shows a flowchart of the control, and FIG. 5 shows a change in the temperature of the water in the inner container 3 (water temperature change line L) and a change in the temperature of the steam discharged from the steam vent 21d in the control of FIG. Further, FIG. 7 shows a change graph similar to FIG. 5 in the re-boiling control at the time of water addition of the conventional electric pot already described.

  Now, the normal boiling control is performed at the time of the first water boiling, and the water heater 4A and the heat retaining heater 4B are both quickly heated (step S1 in FIG. 4). As a result, the temperature of the water in the inner container 3 rises as shown in the graph of FIG. 7 shown in the conventional example. Therefore, the temperature change is sequentially detected by the temperature sensor 12, and the temperature change data is sequentially detected as described above. It inputs into the microcomputer control part 70, and performs boiling determination by the boiling determination means 73 (step S2).

  When the boiling determining means 73 determines boiling (YES in step S2), the temperature at that time is stored as the boiling temperature C0 (° C.) by the boiling point temperature storage means 74 (step S3).

In this way, when the hot water boiling process is completed, the hot water heater 4A is turned off, and thereafter, the heat retaining process by the heat retaining control means 72 is entered (step S4 in FIG. 4).
In addition, when boiling water is desired in this heat retaining state (for example, a heat retaining state at 90 ° C.), the reboiling switch 40 can be pushed to boil water and re-boiled by the heater 4A. Since it is not necessary to discharge steam for removing the chlorine, the hot water in the inner container 3 is heated to the boiling point temperature C0 (° C.) stored at the time of boiling, and then immediately heated without performing the above-described continuous heating. Stop (the water heater 4A is set to 0FF: so-called saving reboiling).

  On the other hand, when the hot water in the inner container 3 is consumed in the same heat retaining state and the hot water in the inner container 3 decreases, the water is added. Automatic reboiling control and steam discharge control after step S5 in FIG. 4 are performed. In this automatic reboiling control, unlike the above-described conventional electric pot, a boiling water heater when water is added using the boiling temperature C0 (° C.) stored in the boiling temperature storage means 74 is used. While the energization control of 4A and the heat retaining heater 4B is performed until the temperature sensor 12 reaches the boiling point temperature C0 (° C.) stored in the boiling point temperature storage means 74, the shortened continuous heating time from when the temperature C0 is reached. After T2 (refer to the time chart in FIG. 5) has elapsed, it is turned OFF. Hereinafter, this control will be described in detail.

  That is, the water added in the heat retaining state is assumed to be tap water, and the tap water contains a chlorinated component. However, the total amount of the chlorinated component in the total amount of water after the addition of water is new tap water. (The hot water that has been kept warm is drained first).

  Further, whether or not water has been added to the inner container 3 in the heat-retaining state (step S5 in FIG. 4) is determined by, for example, the water temperature in the inner container 3 drastically decreasing (for example, 5 for 5 seconds at the time t0 when water is added). And the microcomputer controller 70 detects the rate of temperature decrease at that time via the temperature sensor 12.

  When the microcomputer control unit 70 determines that water is added (YES in step S5), the feed water boiling control by the feed water boiling control means 75 (step S6 in FIG. 4) is started, and both the water heater 4A and the heat retaining heater 4B are started. While the water in the inner container 3 is heated (step S7 in FIG. 4), the microcomputer control unit 70 constantly measures the temperature rise degree of the water in the inner container 3 and determines whether it reaches the boiling point temperature C0. (Step S8 in FIG. 4).

  And the time sensor 12 (and microcomputer control part 70) which detects the water temperature in the inner container 3 detects the arrival to the boiling point temperature C0 (degreeC) which is memorize | stored in the said boiling point temperature memory | storage means 74 (FIG. 5). At the time of t1), the timekeeping operation of the shortened heating steam timer is started and the heat retaining heater 4B is turned off (steps S9 and S10). Continuous heating is performed.

  Further, as shown in the time chart of FIG. 5, when the predetermined time (for example, 25 seconds) elapses from the time t1 when the shortened continuous heating is started (discharged from the steam vent 21d at the time t2 of FIG. 5). When the steam temperature reaches 90 ° C., steam is vented from the steam vent 21d for the time from the time (t2) to the end of the shortened continuous heating time T2 (t4) (steam venting time T3 = 15 seconds, for example). .

  The steam discharge time T3 (15 seconds) is considerably shorter than the steam discharge time T1 (1 minute to 2 minutes) in the normal hot water control shown in FIG. Therefore, the time to remove the chlorine will be sufficiently short, but as mentioned above, the amount (concentration) of the chlorine component in the total amount of water when water is added is small (the amount of the chlorine component in the added water). However, even if the vapor discharge time T3 is short (15 seconds), the chloro component can be sufficiently released, or the residual amount can be effectively reduced to a desired level.

  Then, it is determined whether or not the shortened continuous heating time T2 set by the steam timer in Step S11 of FIG. 4 has elapsed, and when the time T2 has elapsed (YES), the water heater 4A is turned off (Step S11). S12) After turning off the heat retaining heater 4B (step S13), after performing cavitation control (pump non-energization control from boiling point to boiling end notification: steps S14 and S15) and boiling notification (step S16) Then, the process returns to the normal heat retaining step (step S4).

  As in this embodiment, at the time of re-boiling control at the time of water addition, continuous heating from the time when the water temperature in the inner container 3 reaches the boiling point temperature C0 (° C.) stored in the boiling point temperature storage means 74 If the energization of the water heater is continued during time T2, it is possible to effectively save power consumption while ensuring a sufficient decoloring function.

  Further, at the time of automatic re-boiling control at the time of adding water, when the water temperature in the inner container 3 reaches the boiling point temperature C0 (° C.) stored in the boiling point temperature storage means 74, the heat retaining heater 4B is turned off, Thereafter, only the water heater 4A is used for heating, but if this is done, further heat consumption is ensured by maintaining the sufficient steam discharge (de-calking) function and not causing the heat retaining heater 4B to generate heat during continuous heating. Can be reduced.

  By the way, in the automatic reboiling control after step S8 in FIG. 4 described above, the atmospheric pressure becomes low due to, for example, the arrival of a typhoon, and the water temperature in the inner vessel 3 is stored in the boiling point temperature storage means 74 (° C. ) (For example, C0 = 98.5 ° C.) may not be raised, and in such a case, there may be a problem that the heating is continued indefinitely.

  Therefore, in this embodiment, before the hot water temperature in the inner container 3 rises to the boiling point temperature C0 (98.5 ° C.), when the boiling determining means determines that it is boiling (No in step S8, No in S17). Yes), the boiling point temperature C0 stored in the boiling point temperature storage unit 74 is reset, and a new boiling point temperature when the boiling determination unit 71 determines that it is boiling by the boiling water control under the same state is stored in the boiling point storage unit. 24 is updated and stored (the process proceeds to step S18 to step S3).

  More specifically, when the boiling point is detected before the boiling point temperature C0 (° C.) is detected from the time when the feed water boiling control in step S6 is started, the microcomputer controller 70 stores the boiling point temperature storage means. By providing a stored boiling point temperature erasing unit for erasing the boiling point temperature stored in 74 and a return unit for erasing the boiling point temperature by the stored boiling point temperature erasing unit and returning to step S3 (boiling point memory) in FIG. Made.

  That is, the microcomputer control unit 70 determines whether or not the boiling point temperature C0 (° C.) has been detected from the time when the feed water boiling control (step S6) in FIG. 4 is started (step S8 in FIG. 4), and the boiling point. If boiling is detected before the temperature C0 (° C.) is detected (YES in step S17), the boiling point temperature stored in the boiling point temperature storage means 74 is reset (erased) in step S18. After that, control is performed so as to return to the new boiling point temperature memory control in step S3.

  Thereby, after the boiling point temperature is newly stored in the boiling point temperature storage means 74 in step S3, the heat retaining step of step S4 is entered.

  At this time, the boiling point temperature stored in the boiling point temperature storage means 74 is expected to be slightly lower than the boiling point temperature in the normal atmospheric pressure state because the atmospheric pressure is low, and the subsequent feed water boiling control (at the time of water addition) Control) is also controlled based on the boiling point temperature that has been updated and stored.

(Automatic reboil control of other embodiments)
By the way, when adding water in the heat-retaining state, the amount (concentration) of the chlorinated component in the total amount of water changes depending on the amount of added water, and the steam discharge time T3 (FIG. 5) for removing the chlorid is changed to the amount of the hydrated component It is effective to increase or decrease accordingly. That is, when the proportion of the additional water amount in the total water amount is small, the amount of the chlorinated component contained in the total amount of water is reduced, and accordingly, the time for removing the chlorination (steam discharge time T3) may be reduced (electric power). Saving consumption).

  Therefore, in another embodiment of the present application, the reduced continuous heating time T2 can be added and increased or decreased to an appropriate time corresponding to the water amount in consideration of the additional water amount.

  The amount of water to be added can be determined by, for example, storing the amount of warm water before the addition detected by an appropriate water amount detection means in the microcomputer control unit, measuring the total amount of water after the addition, and calculating the amount of warm water before the previous water amount. May be obtained by subtracting or may be obtained from a change in temperature detected by the temperature sensor 12 at the time of water addition (the temperature detected by the temperature sensor 12 decreases as the amount of additional water increases).

  Then, when the amount of additional water is determined, if the shortened continuous heating time T2 is controlled in three stages, for example, long, medium and short, according to the amount of additional water, finer power saving control can be achieved. Yes.

  As another method, for example, after adding water, the amount of water is determined from the temperature increase gradient during heating. And as a result of the water amount determination, when the amount of water is “large”, the continuous heating time T2 after reaching the boiling point is lengthened (40 seconds), and when it is “small”, the time from t1 to t2 in FIG. 5 is short. The continuous heating time T2 may be shortened (10 seconds).

  Furthermore, the transition to the heat retention step is not, for example, the control by the timer as described above after the temperature is raised to the stored temperature, but the heater is turned off after the water temperature detection sensor detects a predetermined temperature rise. You may make it transfer to a heat retention process.

It is a center longitudinal cross-sectional view of the electric pot which concerns on the best embodiment of this invention. It is a top view of the electric pot. It is a block diagram of a control device portion of the electric pot. It is a flowchart which shows the content of the normal boiling control which concerns on the best embodiment of this invention, and the feed water boiling control at the time of water addition. It is a graph which shows the change of the water temperature in the inner container in the control of the same electric pot of FIG. 4, and the change of the steam temperature discharge | released from a steam vent. It is a flowchart which shows the content of the normal hot water control in the conventional electric pot, and the content of the feed water boiling control at the time of water addition. It is a graph which shows the change of the water temperature in the inner container common in each of the normal boiling control of the conventional electric pot, and the feed water boiling control at the time of water addition, and the change of the steam temperature discharge | released from a steam vent.

  1 is a container body, 2 is a lid body, 3 is an inner container, 4A is a hot water heater, 4B is a heat retaining heater, 5 is a hot water supply passage, 6 is a hot water supply pump, 7 is an outer case, 10 is an inner cylinder, 11 is an outer cylinder, Reference numeral 12 is a temperature sensor, 70 is a microcomputer control unit, 71 is a boiling water control means, 72 is a heat retention control means, 73 is a boiling determination means, 74 is a boiling point storage means, and 75 is a feed water boiling control means.

Claims (2)

  An inner container, a water heater for boiling the water in the inner container, a heat retaining heater for keeping the water in the inner container at a predetermined temperature, and a temperature sensor for detecting the temperature of the water in the inner container A hot water control means for controlling the energization of the heaters to boil the water in the inner container, a warming control means for keeping the hot water at a predetermined warming temperature, and the above contents when boiling Boiling determination means for determining the boiling of water in the vessel; boiling point temperature storage means for storing the temperature of water when the boiling determination means determines boiling; as the boiling point; Re-boiling control means for conducting re-boiling control by energization, and avoiding excessive heating after boiling by using the boiling point stored in the boiling temperature storage means for boiling determination at the next re-boiling Like The re-boiling control means turns off the heat retaining heater when the boiling judgment means judges that it is boiling, and turns on the water heater after a predetermined continuous heating time has elapsed from the judgment time. An electric kettle characterized by being turned off and returned to the heat insulation process.   An inner container, a water heater for boiling the water in the inner container, a heat retaining heater for keeping the water in the inner container at a predetermined temperature, and a temperature sensor for detecting the temperature of the water in the inner container A hot water control means for controlling the energization of the heaters to boil the water in the inner container, a warming control means for keeping the hot water at a predetermined warming temperature, and the above contents when boiling Boiling determination means for determining the boiling of water in the vessel, boiling temperature storage means for storing the temperature of the water when the boiling determination means determines boiling, and the addition of water during the heat retention state A boiling water control means for performing re-boiling control by energizing the hot water heater and the heat retaining heater at times, and using the boiling point stored in the boiling temperature storage means for boiling determination at the next re-boiling, After extra An electric pot configured to avoid heat, wherein the feed water boiling control means turns off the heat retaining heater when the boiling judgment means judges that it is boiling, and a predetermined continuous heating time from the judgment time The electric kettle is characterized in that after the elapse of time, the water is heated and the heater is turned off to return to the heat retaining step.

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