JP2737098B2 - Electric hot water storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water storage container.

[0002]

2. Description of the Related Art Generally, in a boiling electric hot water storage container, water contained in an inner container is heated and boiled by an electric heater and then stored in a warm state.

[0003] In such a boiling type electric hot water storage container, when boiling water is desired, re-boiling heating is performed using a re-boiling key. Then, the boiling detection by the re-boiling heating is performed by a boiling detection sensor that detects the temperature of water vapor as in the case of the initial boiling. At the time of the initial boiling, the boiling notification (that is, the transition from heating to heat retention) is delayed in order to secure a certain amount of steam discharge time for the purpose of removing calcium and the like contained in tap water.

[0004]

However, in the case of the boiling detection method as described above, even if the descaling is not required during the heat retention, the boiling notification is delayed as in the case of the initial boiling. Despite the fact that the temperature of the hot water in the vessel has already reached the boiling temperature, the boiling detection by the boiling detection sensor is performed after the discharge of water vapor, and then the boiling is notified, and the waiting time (30 to 40 seconds) during that time is reduced. There is a problem that it feels long and wastes power.

[0005] In addition, a descaling function is provided for discharging calcium contained in tap water together with steam at the time of boiling to remove it.
Boiling time for descaling (in other words, steam discharge time)
Is set to a constant value, so once the boiling water contained in the hot water is greatly reduced compared to the amount of the water contained in the tap water before boiling, it was boiled once Even when the water is reboiled, the water is boiled for the same time as the time of the initial boiling or the automatic reboil by adding water. In other words, the boiling time for descaling was set irrespective of the amount of salt contained in the water, so the electric heater had to be energized unnecessarily long, leading to waste of power and the elapse of the boiling time. There was a problem that pouring was not possible if we had to wait.

[0006] The present invention has been made in view of the above points, and has as its object to minimize the boiling time during manual re-boiling or descaling re-boiling.

[0007]

According to a first basic configuration of the present invention, as means for solving the above-mentioned problems, an inner vessel heated by an electric heater and water contained in the inner vessel are boiled. And an energization control means for controlling energization to the electric heater so as to be able to keep the temperature after the initial boiling is performed. Boiling time setting means for setting the boiling time shorter than the initial boiling time is provided.

In a second basic configuration of the present invention, as means for solving the above-mentioned problems, an inner vessel heated by an electric heater and an initial boiling for boiling water contained in the inner vessel are executed. In the electric hot water storage container provided with an energization control means for controlling energization of the electric heater so as to be able to keep the temperature, a boiling time change for setting the second and subsequent descaling boiling times shorter than the first descaling boiling time Means are attached.

[0009]

According to the first basic configuration of the present invention, the following effects can be obtained by the above means.

[0010] That is, at the time of re-boiling by the descaling key during the heat retention, the descaling boiling time due to the re-boiling is set shorter than the initial boiling time, but the amount of calcium contained in the hot water once boiled is reduced. Therefore, sufficient descaling can be performed in a descaling and boiling time shorter than the initial boiling time for boiling tap water, and unnecessary heater heating is not required.

In the second basic configuration of the present invention, the following effects can be obtained by the above means.

That is, 2 hours after the first descaling boiling time
The descaling boiling time after the first time is set short, but as the descaling boiling is repeated, the amount of calcium contained in the hot water in the inner container decreases, so by shortening the descaling boiling time accordingly In addition, sufficient descaling can be performed in the required minimum descaling and boiling time without unnecessary heater heating.

[0013]

According to the first basic configuration of the present invention, the descaling boiling time due to the reboil is set to be shorter than the initial boiling time at the time of re-boiling by the descaling key during heat insulation. Once the boiling water contains less calcium, the descaling is shorter than the initial boiling time to boil the tap water. Has an excellent effect.

According to the second basic configuration of the present invention, the desalting boiling time for the second and subsequent desalting is set to be shorter than the first descaling boiling time. Since the amount of calcium contained in the hot water is reduced, the descaling and boiling time can be shortened correspondingly, and sufficient descaling can be performed with the minimum required descaling and boiling time without unnecessary heater heating. There is an excellent effect.

[0015]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 4 show an electric hot water storage container according to a first embodiment of the present invention.

As shown in FIGS. 1 and 2, the electric hot water storage container of this embodiment is provided with a synthetic resin shoulder 3 on an upper portion of a metal outer case 2 and a stainless steel inside the outer case 2. A container body 1 containing an inner container 4, a lid 5 for covering the upper part of the container body 1, an air pump 6 provided in the lid 5, and a series of liquid discharge passages 7. Have been.

The inner container 4 has a cylindrical shape with a bottom, and a flange portion 4a formed at an upper end thereof is attached to the shoulder body 3.
Is supported in the outer case 2 by being suspended on the inner peripheral edge 3a of the outer case 2. A bottom member 8 made of a synthetic resin is in contact with the lower end of the outer case 2, and the bottom member 8 and the inner container 4 are connected via a connection fitting 9. As a result, the outer case 2, the inner container 4, and the bottom member 8 are integrated with each other.

The lower opening 8a of the bottom member 8 is closed by a bottom cover 10, and a rotating seat 11 is rotatably supported on the outer periphery of the lower surface of the bottom cover 10. Thus, when the container main body 1 is fixed, the container main body 1 is lightly rotated on the rotating seat body 11.

An electric heater 12 is in contact with the lower surface of the bottom of the inner container 4, and below the electric heater 12,
The heat shield plate 13 is fixed to the bottom of the inner container 4 in a fixed state. And the electric heater 12
Is held in a state of being pressed against the bottom of the inner container 4 by a spring plate 14 interposed between the heat shield plate 13 and the heat shield plate 13. In the case of the present embodiment, the electric heater 12 includes a water heater 12A and a heat retaining heater 12B.

A through hole 15 is provided at the center of the electric heater 12.
A temperature sensor 16 for detecting the temperature of the inner container 4 is disposed in the through hole 15 so as to be separated from each other by a heat shield wall 17.

In the bottom member 8, a circuit housing box 18 is integrally formed with a downward opening, and a circuit board 19 is housed in the circuit housing box 18. The lower end opening of the circuit housing box 18 is covered with a cover 20. This makes it possible to provide waterproofing against water leakage from above or water from below.

The circuit board 19 contains various elements constituting a microcomputer.
In response to an output signal from the operation panel 21 provided on the upper surface of the beak 3b protruding forward and various detection signals from the temperature sensor 16 and the like, the operation of boiling and heat retention is controlled, and the operation display and timer are displayed. Display control and the like by setting are performed. The operation panel 21 is provided with a reboil key 59, a boil indicator light 60, a heat retention indicator light 61, a descaling key 62, and a descaling indicator light 63 (see FIG. 3).

The cover 5 is provided with a hinge pin 23 against a partially open type bearing 22 integrally formed at the rear of the shoulder 3.
, And are pivotally supported so as to be freely opened and closed and detachable. That is, the lid 5 is opened and closed with the hinge pin 23 as a fulcrum, and is detachable by detaching the hinge pin 23 from the bearing 22 at a predetermined opening angle. On the other hand, a lock device 24 for holding the closed state of the lid 5 is provided on the free end side of the lid 5.

The liquid discharge passage 7 passes from the bottom of the inner container 4 to the front of the inner container 4 and passes through the beak 3 of the shoulder 3.
b is formed as a series of passages facing the ejection guide 25 formed in the inside of the ejection guide 2.
5 is opened with an opening gap to the atmosphere. Thus, the liquid to be poured out is once released to the atmosphere and then flows into the pouring guide 25 so that the liquid can be gently poured.

In the middle of the liquid discharge passage 7 (that is, immediately before the outlet 26), a water stop valve 27 is provided, which receives the weight of the hot water container or the pressure of the liquid flowing out when the hot water storage container falls. The water stop valve 27 is closed to prevent the liquid from flowing out through the liquid discharge passage 7 to the outside.

Further, in the middle of the liquid discharge passage 7 (that is,
The portion located in front of the inner container 4) is a transparent tube 28, from which the liquid level of the liquid flowing into the transparent tube 28 is supplied from outside through a liquid amount display window 29 provided on the front surface of the outer case 2. It is visible.

The air pump 6 is constructed by interposing an annular bellows 32 between a bellows lower plate 30 and a bellows upper plate 31 which also serve as a bottom plate of the lid 5. Compressed air is generated in the bellows 32 which expands and contracts by the pressing operation of the pump pressing plate 33 exposed to the upper surface of the lid 5. Reference numeral 34 denotes a return spring for extending and returning the bellows 32.

On the lower surface of the bellows lower plate 30, a metal inner lid 35 for covering the upper opening 4b of the inner container 4 when the lid 5 is closed is fitted from below and attached by screws 36. . A seal packing 37 is provided on the outer peripheral edge of the inner lid 35 to abut on the flange portion 4a of the inner container 4 when the lid 5 is closed to maintain an airtight state.

Between the bellows lower plate 30 and the inner lid 35, steam S generated in the inner container 4 is formed by a passage forming member 38 fixedly fastened to the bellows lower plate 30 by the screws 36. A part of a steam discharge passage 39 for discharging to the outside without passing through the air pump 6 is formed. The steam discharge passage 39 includes a first passage 39a formed between the passage member 38 and the inner lid 35, and a second passage 39a formed between the passage member 38 and the bellows lower plate 30. A passage 39b and a third passage 39c extending upward in the lid 5 from the rear exit side of the second passage 39b, and the first passage 39a has an inlet opening 40 formed in the inner lid 35. The first passage 39a and the second passage 39b are communicated with the inner container 4 through a central portion of the passage member 38 (a position directly below a valve body 47 described later in detail).
The third passage 39c is connected to an outlet opening 42 formed on the upper surface on the rear side of the lid 5 through a through hole 41 formed in the lid 5.
It is communicated to the outside through. The first and second passages 39a and 39b constitute a part of an air blowing passage for blowing pressurized air from the air pump 6 as described later.

A valve chamber 44 is formed between the passage member 38 and the inner lid 35. The valve chamber 44 is surrounded by a cylindrical wall 43 extending vertically from the edge of the through hole 41. In the valve chamber 44, there is provided a falling water stop valve 45 for closing the through hole 41 by its own weight and the flow pressure of the outflow liquid when the hot water storage container falls.

At the center of the lower surface of the bellows upper plate 31,
A holding cylinder 46 having a vertical slit 46a is vertically provided integrally, and a valve body 47 formed of a hollow cylindrical body that is opened up and down is slidably inserted into the holding cylinder 46. Have been. The valve body 47 slides up and down in the holding cylinder 46 as the bellows upper plate 31 moves downward with the hook 47a formed at the upper end thereof being engaged with the slit 46a of the holding cylinder 46. It has been. The valve body 47 is moved downward or upward by the urging force of a spring 48 interposed between the valve body 47 and the bellows upper plate 31 (in other words, when the pump push plate 33 is pressed or non-pressed). (Pressing operation) to move downward or upward. Further, this valve element 47 is provided with a slit 46
The maximum lowering position from the holding cylinder 46 is regulated by the engagement between the lower end of the hook a and the hook 47a.

The valve body 47 is vertically slidably fitted into an opening 49 formed at the center of the bellows lower plate 30, and its lower end 47 b is connected to the second passage 39.
b, it is located just above the through hole 41. When the pump push plate 33 is pressed, the valve body 47 is moved downward in conjunction therewith so as to be pressed against the edge of the through hole 41, and the inside of the air pump 6 and the inside of the inner container 4 are brought into contact with each other. Air passage 50 comprising a space inside and first passage 39a
Through the first passage 39a and the second passage 39a.
The function of blocking communication with the passage 39b and closing the steam discharge passage 39 is achieved. In addition, the outer peripheral portion 51a is annularly held between the bellows lower plate 31 and the passage forming member 38 at the outer circumferential position of the opening 49 of the bellows lower plate 31 and the inner peripheral portion 51a.
b is the valve membrane 51 fitted to the rim of the valve body lower end portion 47b.
Is provided. The valve membrane 51 secures a seal with the rim of the through hole 41 when the valve body 47 is moved down,
When the valve body 47 is moved up (in other words, when the air pump 6 is not operated), the second passage 39 b functions to prevent communication with the inside of the air pump 6 via the opening 49. Reference numeral 52 denotes a discharge port of the air pump 6, 53 denotes a communication port for communicating the inside of the valve membrane 51 with the inside of the valve body 47, 54 denotes a valve seat provided in the valve body 47, and 55 denotes the valve seat 54 when erected. Is a ball valve type safety valve that closes the valve and opens the valve seat 54 when it falls down. The upper limit of the valve body 47 is regulated by the contact between the inner peripheral portion 51b of the valve membrane 51 fitted to the lower end portion 47b and the rim of the opening 49. Upper end hook 47a and slit 46 of holding cylinder 46
The upper end of the bellows upper plate 31 is also restricted by the engagement force with the lower end a.

When the hot water storage container falls, the safety valve 55
The hot water flowing out of the inlet opening 40 into the steam discharge passage 39 through the valve opening 47 flows into the air pump 6 by the opening operation of the valve, so that a large amount of hot water does not flow out of the steam discharge passage 39 to the outside. . Then, when the hot water storage container is re-established, the hot water in the air pump 6 passes through the discharge port 52, the valve membrane 51, the communication port 53 and the valve element 47 to reach the steam discharge passage 39, and then from the inlet opening 40 to the inner container. Refluxed into 4.

In the drawings, reference numeral 56 denotes a lock mechanism for regulating the operation of the air pump 6 (in other words, the operation of the pressing plate 33), 57 denotes an intake valve of the air pump 6, and 58 denotes a port for carrying the hot water storage container. It is a handle.

Next, electric components of the electric hot water storage container of this embodiment will be described with reference to a block diagram shown in FIG.

An electric heater 12A for heating water and an electric heater 12B for keeping heat, a temperature fuse 64, a temperature sensor 16, a buzzer 65 for informing boiling, a commercial AC power supply 6 for a circuit board 19 acting as a microcomputer.
6 and the switch board 21a in the operation panel 21 are connected as shown in FIG. The switch board 21
A re-boiling key 59 and a descaling key 62 are connected to a. Further, from the circuit board 19, a boiling indicator light 60, a warming indicator light 61 and a descaling indicator light 63 are provided.
, And a sounding command signal to the buzzer 65 is output.

The microcomputer 19
As shown in FIG. 5, the temperature control unit 191 controls the power supply to the electric heater 12A, and the temperature T 16 detected by the temperature sensor 16 that detects the temperature of the hot water during re-boiling by the re-boiling key 59 during heat retention. Notification control means 192 for performing boiling notification when the temperature reaches the boiling equivalent temperature T ₁ , and a boiling time setting for setting the descaling boiling time t ₂ at the time of re-boiling by the descaling key 62 to be shorter than the initial boiling time t _1. Means 193 and boiling time changing means 194 for setting the second and subsequent descaling boiling times t ₃ shorter than the first descaling boiling time t ₂ .

Next, the water heater control in the electric hot water storage container according to the present embodiment will be described in detail with reference to the flowchart of FIG. 6 and the time charts of FIG. 7 and FIG. In the following description, boiling by the descaling boiling time t ₁ and the large initial boiling time t _{1 is referred} to as “descalting 2”.
Expressed as, boiling by without chlorine boiling time t ₂ is expressed as "without chlorine 1", and that the Without chalk boiling time t ₃ and a small amount initial boiling time t ₃ is expressed as "General kettle". Here, it is assumed that t ₁ > t ₂ > t ₃ .

When the power is supplied to the electric hot water storage container, the inner container 4
The heating of the water in the inside is started, and the amount of the water at that time is determined, and the boiling control is performed in accordance with the determination. That is,
Determines whether or not the boiling in step S ₁ is in the initial stage of heating is naturally negative decision. Then the temperature information T from the temperature sensor 16 in step S ₂
There are input, automatic re-boiling temperature Ts in step S ₃
(See FIGS. 7 and 8). Where T
If it is determined that ≦ Ts, and automatic reboiled flag F ₁ ← 1 in step S _4, and without chlorine flag F ₂ ← 0 in step S _5. Thereafter, although whether or not an ON operation of the reboil key 59 and without chlorine key 62 is determined in step S ₆ and step S _7,
For the initial stage of heating is that the ON operation of the reboil key 59 and without chlorine key 62 is not performed, the control by the microcomputer 19 returns to step S _1. Incidentally, when it is determined that T> Ts in step S _3, the flow directly advances to step S ₆ and step S _7, but whether or not an ON operation of the reboil key 59 and without chlorine key 62 is determined, for the initial stage of heating is that the oN operation of the reboil key 59 and without chlorine key 62 is not performed, the control by the microcomputer 19 returns to step S _1.

During the repetition of the above control, the temperature of the water in the inner container 4 rises due to heating.
= DT / dt, and the inner container 4
Estimate the amount of water contained within. That is, α ≧ α ₀
For (= predetermined value) (i.e., when the straight line L ₁ in FIG. 7) is recognized as a small amount in the case of alpha <alpha ₀ (i.e., when the straight line L ₂ in FIG. 8) is recognized as a large amount in In the storage section of the microcomputer 19.

Thereafter, the temperature of the hot water in the inner container 4 is increased to the boiling temperature T.
₁ (that is, 100 ° C.), when it is determined in step S ₁ that boiling is taking place, it is determined in step S ₈ whether only a small amount of water is being boiled (ie, α ≧ α ₀ is determined), and a negative determination is made. Case (that is, when it is determined that a large amount of water is being boiled)
The automatic reboil flag F ₁ = 0 in step S ₉
It is determined whether F ₁ ← 1 has already been set in step S ₄ , and “descaling 2” is executed in step S _{10 using} the large initial boiling time t ₁ (see FIG. 7). is, set to without chlorine flag F ₂ ← 1 in step S _11, and then returns to step S _1.

On the other hand, a small amount kettle (i.e., α ≧ α ₀₎ in step S ₈ when it is determined that the step S
_After setting the descaling flag F ₂ ← 0 in ₁₂ , the process proceeds to step S ₁₃ , where “general water heating” is performed by the small amount initial boiling time t ₃ (see FIG. 8), and then the process returns to step S ₁ .

As one of the usage modes of the electric hot water storage container, there is a usage mode in which tap water is added while hot water remains in the inner container 4, and in this case, the hot water temperature T is set to the automatic re-boiling temperature Ts.
It falls below. Also in this case, whether it was done adding a large amount of tap water it is estimated by the temperature increase rate alpha, the as well as by steps S ₈ ~ step S ₁₃ "without chlorine 2" or "General kettle" is Be executed.

Next, after shifting to the warming state (ie, after a negative determination in step S ₁ ), if there is an ON operation of the reboil key 59 (ie, if a positive determination is made in step S ₆ ), step time data ts until boiling corresponding to the amount of water is read from a table prepared in advance in S _14. Here, the amount of water in the inner container 4 is obtained by obtaining the rate of increase α of the hot water temperature T by the temperature sensor 16, and the amount of heat that can be supplied to the water from the water heater 12A is determined. Insulation temperature T ₂
Starting the steam discharged from (i.e., boiling temperature) main heating time to T ₁ (i.e., time data ts) also comes determined. The relationship between the amount of water and the required heating time is stored in the microcomputer 19 as a table. Then, step S ₁₅
The countdown time data ts is started at a time when the data ts is determined to become zero in step S _16, the process proceeds to incubated with buzzer 65 is made boil notification by blowing in step S _17, then returns to the step S _1. In other words, without waiting for the discharge of steam, will be hot water temperature T is boiled notification is made when it reaches the boiling temperature T _1, so that the time until boiling notification is shortened as much as possible.

[0046] Then, after shifting to insulation state (i.e., after a negative determination is made in step S _1), when there is ON operation without chlorine key 62 (i.e., if an affirmative determination is made in step S _7), step Although whether a without chlorine flag F ₂ = 1 determination in S _18,
Already with without chlorine flag F ← 1 in step S _11, and since that is determined to T> Ts in step S _3, by without chlorine boiling time t ₂ (see FIG. 7) in step S _19, "without chlorine 1" Is executed,
In step S ₂₀ is as without chlorine flag F ₂ ← 0, and then returns to step S _1.

When the descaling key 62 is turned on again during the continuation of the heat retention (that is, at step S
₍ If affirmative determination is made again in step ₇ ), step S
_Since the descaling flag F ₂ is set to 0 in ₂₀ , the determination in step S ₁₈ is negative, and the process proceeds to step S ₁₃ , and the descaling boiling time t ₃ (see FIG. 7).
After the "General water heater" is executed, step S ₁
Return to

The above-mentioned boiling control will be described in more detail with reference to time charts shown in FIGS.

(I) When heating is started from a state in which a large amount of tap water is stored (see FIG. 7) It is determined that a large amount is stored by the rate of increase α of the temperature rise straight line L ₁ , and “Desalting 2” by the initial boiling time t ₁ Is executed. Then, when the amount of hot water in the inner container 4 decreases due to the use of hot water and a large amount of tap water is added, it is determined that a large amount of tap water is to be added based on the rise rate α of the temperature rise straight line L ₁ , and the initial boiling time t ₁
Is performed. By the above-mentioned "descaling 2", descaling contained in tap water is performed. Thereafter, when the re-boiling key 59 is turned ON when the temperature is kept at the temperature T ₂ , the hot water temperature T becomes the boiling temperature T.
_When reaching ₁ , boiling notification and heat retention switching are performed.
That is, the boiling notification is performed without waiting for the steam discharging time. Thereafter, when the descaling key 62 is turned on, “descaling 1” is performed by the descaling boiling time t ₂ . Thereafter, when the descaling key 62 is turned on again while the heat retention is continued, the descaling boiling time t ₃
Is performed. In this case, a short descaling time is sufficient because the boiling water is reboiled once.

(II) When heating is started from a state in which a small amount of tap water is stored (see FIG. 8) It is determined that a small amount is stored by the rise rate α of the temperature rise straight line L ₂ , and the “normal water boiling” is determined by the small amount initial boiling time t _3. Is executed. Thereafter, when the re-boiling key 59 is turned ON while the temperature is kept at the temperature T _2, when the hot water temperature T reaches the boiling temperature T ₁ , the boiling notification and the temperature switching are performed. That is, the boiling notification is performed without waiting for the steam discharging time. Then, decrease the hot water in the inner container 4 by the use of hot water, when a small amount of tap water is added, it is determined small amount added with the increase rate of temperature increase linearly L ₂ alpha, due to the small amount initial boiling time t ₃ ""General water heater" is executed.
In the above case, since the amount of calcium contained in the hot water is small, sufficient descaling can be obtained with a short boiling time. Thereafter, when the amount of hot water in the inner container 4 decreases due to the use of hot water and a large amount of tap water is added, it is determined that a large amount is to be added based on the rise rate α of the temperature rise straight line L ₁ , and “large amount of initial boiling time t ₁ ” Descaling 2 "is executed. By the above-mentioned "descaling 2", descaling contained in tap water is performed. After that, when the heat is kept at the heat keeping temperature T ₂ , the descaling key 62
But when it is ON operation, due to without chlorine boiling time t ₂ "without chlorine 1" is executed. Thereafter, when the descaling key 62 is turned on again during the continuation of the heat retention, “general water heating” is performed by the descaling boiling time t ₃ . In this case, a short descaling time is sufficient because the boiling water is reboiled once.

As described above, in the present embodiment, when re-boiling by the re-boiling key 59 during warming, the boiling notification is performed when the detected hot water temperature T detected by the temperature sensor 16 reaches the boiling equivalent temperature T _1. As a result, it is not necessary to wait for the steam discharge time as in the conventional example, and the power consumption can be significantly reduced.

The descaling boiling time at the time of re-boiling by operating the descaling key 62 is set shorter, and the descaling boiling time at the time of re-boiling by the operation of the descaling key 62 for the second and subsequent times is further shortened. Therefore, the descaling time can be set in accordance with the amount of descaling that decreases with each boiling. Therefore, sufficient descaling can be achieved with a minimum necessary descaling time without wasting unnecessary heater heating, and power consumption can be significantly reduced.

Also, at the time of the initial boiling with a small amount of water and the automatic re-boiling with the addition of a small amount of water, the “general water boiling”
In the case of initial boiling with a large amount of water or automatic re-boiling by adding a large amount of water, a large amount of initial boiling time is set as “descaling 2”. However, since the amount of calcium included in the tap water varies depending on the amount of tap water, setting the boiling time corresponding to the amount can eliminate unnecessary heater heating.

Second Embodiment FIG. 9 shows a flowchart for controlling boiling in an electric hot water storage container according to a second embodiment of the present invention.

In the case of the present embodiment, the boiling configuration at the time of the ON operation of the reboil key 59 is different from that of the first embodiment, but the hardware configuration is the same as that of the first embodiment. Hereinafter, the boiling control will be described with reference to the flowchart of FIG.

Also in the case of this embodiment, the heating of the water in the inner container 4 is started by turning on the power to the electric hot water storage container.
The magnitude of the amount of water at that time is determined, and boiling control is performed accordingly. That is, it is determined whether the boiling in step S _1, in the initial stage of heating is naturally negative decision. Then the temperature sensor in step S ₂ 1
Temperature information T from 6 are input, compared with the automatic re-boiling temperature Ts is made at Step S _3. Where T ≦ T
If it is determined that s, the automatic reboiled flag F ₁ ← 1 in step S _4, and without chlorine flag F ₂ ← 0 in step S _5. Thereafter, step S ₆ and S but whether there ON operation of the reboil key 59 and without chlorine key 62 or the S ₇ is determined, in the initial stage of heating reboil key 59 and without chlorine key 6
Since the ON operation of _No. 2 is not performed, the control by the microcomputer 19 returns to step S1. In addition,
If it is determined that T> Ts in step S _3,
Directly proceeds to step S ₆ and step S _7, but whether or not an ON operation of the reboil key 59 and without chlorine key 62 is determined, in the initial stage of heating the reboiling keys 59
Since the ON operation of the descaling key 62 is not performed, the control by the microcomputer 19 is performed in step S
Return to ₁ .

During the repetition of the above control, the temperature of the water in the inner container 4 rises due to heating.
= DT / dt, and the inner container 4
Estimate the amount of water contained within. That is, α ≧ α ₀
In the case of (= predetermined value), it is recognized as a small amount, and in the case of α <α ₀ , it is recognized as a large amount and stored in the storage unit of the microcomputer 19.

Thereafter, the temperature of the hot water in the inner container 4 is increased to the boiling temperature T.
₁ (that is, 100 ° C.), when it is determined in step S ₁ that boiling is taking place, it is determined in step S ₈ whether or not a small amount of water is being boiled (ie, determination of α ≧ α ₀ ). In a case where it is determined that a large amount of water is being boiled, it is determined whether or not the automatic reboil flag F ₁ = 0 in step S _9. However, it is already determined in step S ₄ that F ₁ ← 1. because you are, by mass initial boiling time t ₁ "without chlorine 2" is performed in step S _10, without chlorine flag F ₂ ← 1 in step S ₁₁
Is a, whether the first boiling at step S ₁₂ is determined. Here, if an affirmative determination is made, the boiling temperature T ₁ of the temperature sensor 16 has detected at the time of the boiling in step S ₁₃ is stored as storage data. And then return to step S _1. Step S ₁₂
Determination is negative (i.e., the second and subsequent boiling with determination) in the case of, without storing the stored data, the process returns to step S _1.

Meanwhile, a small amount kettle (i.e., α ≧ α ₀₎ in step S ₈ when it is determined that the step S
_After setting the descaling flag F ₂ ← 0 in ₁₄ , the process proceeds to step S ₁₅ , where “general water heating” is performed with a small amount of initial boiling time t ₃ , and then the process proceeds to step S ₁₂ , where 1 is obtained by the same processing as in the previous period. It is determined whether or not it is the second boiling. If a positive result in this case, in step S ₁₃ the boiling temperature T ₁ of the temperature sensor 16 has detected at the time of the boiling is stored as stored data, and then returns to step S _1.

Incidentally, as one of the usage modes of the electric hot water storage container, there is a usage mode in which tap water is added while hot water remains in the inner container 4, and in this case, the hot water temperature T becomes the automatic re-boiling temperature Ts.
It falls below. Also in this case, whether it was done adding a large amount of tap water is estimated by the temperature increase rate alpha, the similarly by Step S ₈ ~ step S ₁₁ and "without chlorine 2" is executed.

[0061] Then after shifting to insulation state (i.e., after a negative determination is made in step S _1), if there ON operation of reboiled key 59 (i.e., if an affirmative determination is made in step S _6), step boiling temperatures T ₁ in S ₁₆ is a storage data is read, the comparison determination between the detected temperature T of the temperature sensor 16 and the boiling temperature T ₁ is made in step S _17, if it is determined that T ≧ T _1, step S _{At 18} , the buzzer 65 sounds and the boiling is notified, and the operation shifts to heat retention. In other words, without waiting for the discharge of steam, will be hot water temperature T is boiled notification is made when it reaches the boiling temperature T _1, so that the time until boiling notification is shortened as much as possible.

[0062] Then, after shifting to insulation state (i.e., after a negative determination is made in step S _1), when there is ON operation without chlorine key 62 (i.e., if an affirmative determination is made in step S _7), step Although whether a without chlorine flag F ₂ = 1 determination in S _19,
Already with without chlorine flag F ← 1 in step S _11, and since that is determined to T> Ts in step S _3, by without chlorine boiling time t ₂ in step S ₂₀ is "without chlorine 1" is executed, step S ₂₁
In this case, the descaling flag F ₂ ← 0 is set, and thereafter, the process returns to step S ₁ .

If the de-scaling key 62 is turned on again during the subsequent heat retention (ie, step S
Because the case where an affirmative determination is made) in _7, there is a without chlorine flag F ₂ ← 0 in step S _21,
Determination in step S ₁₉ is negative determination, the process proceeds to step S _15, upcoming by without chlorine boiling time t ₃ "General kettle" is executed. After that, the process proceeds to a step S _12,
Although whether first boiling is determined, so reboiled by bypassing step S ₁₃ the routine returns to step S _1.

As described above, also in the present embodiment, when re-boiling by the re-boiling key 59 during the heat retention, the boiling notification is performed when the detected hot water temperature T by the temperature sensor 16 reaches the boiling equivalent temperature T _1. As a result, it is not necessary to wait for the steam discharge time as in the conventional example, and the power consumption can be significantly reduced. Other functions and effects are the same as those of the first embodiment.

The present invention is not limited to the configuration of each of the above embodiments, and it is needless to say that the design can be changed as appropriate without departing from the gist of the invention.

[Brief description of the drawings]

FIG. 1 is an upper longitudinal sectional view of an electric hot water storage container according to a first embodiment of the present invention.

FIG. 2 is a lower longitudinal sectional view of the electric hot water storage container according to the first embodiment of the present invention.

FIG. 3 is an enlarged plan view of an operation panel portion of the electric hot water storage container according to the first embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of an electric element in the electric hot water storage container according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing the contents of a microcomputer in the electric hot water storage container according to the first embodiment of the present invention.

FIG. 6 is a flowchart for explaining boiling control in the electric hot water storage container according to the first embodiment of the present invention.

FIG. 7 is a time chart in a case where a large amount of tap water is stored and heating is started in the electric hot water storage container according to the first embodiment of the present invention.

FIG. 8 is a time chart in a case where a small amount of tap water is stored and heating is started in the electric hot water storage container according to the first embodiment of the present invention.

FIG. 9 is a flowchart for explaining boiling control in the electric hot water storage container according to the second embodiment of the present invention.

[Description of Signs] 1 is a container body, 4 is an inner container, 12A is a rice cooking heater, 12
B is a heat retention heater, 16 is a temperature sensor, 19 is a circuit board (microcomputer), 21 is an operation panel, 59 is a reboil key, 62 is a descaling key, 65 is a buzzer, 1
91 is an energization control unit, 192 is a boiling notification control unit, 19
3 is a boiling time setting means, and 194 is a boiling time changing means.

Claims (2)

(57) [Claims] An inner container heated by an electric heater;
Perform an initial boiling the water contained in the inner container Ru boiled
An electrical hot water storage vessel and a current supply control means for controlling the energization of the electric heater so as to heat retention after, at the time of re-boiling by without chlorine key in the warmth
The descaling boiling time due to the reboil is referred to as the initial boiling time.
An electric hot water storage container provided with a boiling time setting means for setting a shorter time . 2. An inner container heated by an electric heater,
Execute the initial boiling to boil the water contained in the inner container
Control the energization of the electric heater so that it can keep warm after
An electric hot water storage container provided with a
Second time after the first descaling boiling time in warm water
Boiling time changing hand to set shorter descaling boiling time
An electric hot water storage container having a step.