JP2795227B2 - 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, and more particularly, to an electric hot water storage container having a boiling mode in which a liquid content is heated and boiled, and a heat retaining mode in which the liquid content is heated to a predetermined temperature. In particular, the present invention relates to heating control in the heat retention mode.

[0002]

2. Description of the Related Art Conventionally, in an electric water storage container using a microcomputer, in order to keep a boiling liquid content at a predetermined temperature, a heating heater set at a predetermined capacity of, for example, 60 W to obtain a predetermined heating capacity is used. Heating is performed by turning on at or below the lower limit temperature of the heat retention, or controlling to stop the heating by turning off the heat retention heater at the upper limit temperature of the heat retention, or
In general, the same control is performed by energizing a heater common to boiling and heat keeping at a W number for obtaining a predetermined heating capacity.

On the other hand, in a control circuit not using a microcomputer, as shown in FIGS.
Is supplied by an AC power source b, and a voltage signal v1 obtained by the temperature detected by the temperature sensor c to achieve the heat insulation mode.
And the reference voltage v2, the triac d is controlled to a full-wave energization state of, for example, 60 W via the transistor e while the content liquid is at or below the upper limit temperature of the heat retention, and this control is performed when the temperature exceeds the upper limit temperature. At the same time, the triac d is controlled to the full-wave energization stop state by the function of the transistor f. As a result, a warm state in which the temperature changes as shown in FIG. 12 is obtained. In addition,
In the boiling mode of the content liquid, power is supplied at 900 W using a dedicated water heater.

[0004]

However, if the temperature is maintained by heating under uniformly set conditions as described above, various wastes are caused in the heating.

[0005] For example, in order to use a high-temperature content liquid in a state where it is not used for a long time, or it is re-boiled in a short time so that a high-temperature content liquid can be used, it is often used. Even if the device is not used for a long time due to reasons such as being out of the night or going out, it is highly likely that useless heat control at a predetermined temperature will result in unnecessary heating.

In order to keep the temperature at a predetermined temperature, if the heating capacity is always set to a constant value, the amount of the content liquid may be smaller than the set heating capacity. Even if the temperature is not small, when the room temperature is high, an overshoot due to an early temperature rise may occur, resulting in unnecessary heating.
Unnecessary heating due to the small amount of the content liquid is likely to occur when the content liquid is poured out during the heat retention and becomes small.

[0007] These wasteful consumption of electric power is a problem in terms of cost reduction and is not preferable in terms of energy saving.

An object of the present invention is to solve such a problem, and a main object of the present invention is to provide an electric hot water storage container capable of achieving heat retention without unnecessary heating.

[0009]

In order to achieve the above object, the present invention is directed to a boiling mode in which a content liquid is heated and boiled, and a heat insulation in which the content liquid is heated to a predetermined temperature. In an electric hot water storage container having a mode, in the heat retention mode, the amount of water is determined again also as an empty cooking determination, and a heating capacity for obtaining a predetermined heat retention temperature is set according to the determination. is there.

According to a second aspect of the present invention, there is provided a thermal insulation system in which a water content is determined in a boiling mode in which a content liquid is heated and boiled, and in a boiling mode or a heat retention mode immediately after boiling, so that the content liquid is heated to a predetermined temperature. In the electric hot water storage container having the mode, in the heat retention mode, when the operation of discharging the content liquid is performed, the amount of water is determined again, and a heating capacity for obtaining a predetermined heat retention temperature is set according to the determination. It is a feature.

A third aspect of the present invention is the method according to any one of the first and second aspects, further comprising detecting a room temperature and setting the heating capacity in consideration of the room temperature.

According to a fourth aspect of the present invention, in the same basic configuration as the first aspect of the present invention, when the heat retention is continued for a predetermined time in the non-use state in which the operation of discharging the content liquid is not performed in the heat retention mode, the preset value is set in advance. The heating capacity is set so as to obtain the heat retention temperature in the unused heat retention state according to the amount of water at that time.

According to a fifth aspect of the present invention, in addition to the fourth aspect of the present invention, a room temperature is detected, and the heating capacity is set so as to obtain an optimum heat retaining temperature in consideration of the room temperature.

According to a sixth aspect of the present invention, there is provided an electric hot water storage container having a heat retaining mode in which a liquid content is heated by an AC power source to maintain the temperature at a predetermined temperature. It is characterized by heating by wave energization.

[0015] Other objects and features of the present invention will become apparent from the following description and drawings.

[0016]

According to the above construction of the first aspect of the present invention, the amount of water is also determined in the warming mode in combination with the determination of the empty cooking, and if the state is the empty cooking according to this determination, the measure is taken. By setting the heating capacity to obtain the temperature in accordance with the determined water volume, it is possible to perform optimal heating corresponding to the actual amount of the liquid content in the warming mode by detecting the water volume that also serves as the empty cooking determination. In addition, even when the amount of the content liquid changes at the time of the heat retention mode, the optimal heating is achieved, which is preferable. The setting of the heating capacity according to the amount of water is, for example, to set the heating capacity to be small when the amount of the content liquid is small, and to set the heating capacity to be large when the amount of the content liquid is large. In proportion to the quantity,
It is possible to prevent the heating from being excessive and causing overshooting to cause waste in the heating, and it is possible to achieve energy saving in heating for keeping the content liquid at a predetermined temperature.

In the above configuration of the second aspect of the invention, the amount of water is determined in the boiling mode or in the heat retention mode immediately after the boiling,
Optimum heating is performed in the boiling mode and the heat retention mode with the heating capacity according to the water volume.However, when the operation of discharging the content liquid is performed, the water volume is determined, and the heating for obtaining the predetermined heat retention temperature is performed according to the determination. Since the volume is set, even if the liquid amount changes due to the discharge of the content liquid, heating corresponding to the change can be performed, which is more preferable.

[0018] In the above configuration of the third aspect of the present invention, in any one of the first and second aspects of the present invention, the room temperature is further detected and the optimum heating capacity is set in consideration of the room temperature. If the temperature is high, set the heating capacity small, and if the room temperature is low, set the heating capacity large,
Since it is possible to prevent overheating due to excessive heating as compared with room temperature and wasteful heating, it is possible to further save energy in heating the content liquid to a predetermined temperature.

According to the above construction of the present invention, when the heat retention is continued for a predetermined time in the non-use state in which the operation of discharging the content liquid is not performed, the optimum heat retention temperature for the preset non-use heat retention state is obtained. By setting the heating capacity in consideration of the volume of the content liquid, the content liquid is kept as it is by suppressing the heating so that the temperature becomes lower than the normal temperature when the non-use state continues for a long time. Waste of heating, such as keeping the liquid at a high eye temperature so that it is used or reboiled in a very short time, and excessive heating with respect to the amount of water Energy consumption can be achieved, and for resumption of use due to re-boiling, the rise of the content liquid to boiling is much quicker than at room temperature, and the inconvenience due to energy conservation is sufficiently suppressed. In That.

According to the above construction of the fifth aspect of the invention, in the fourth aspect of the invention,
In the invention of the third aspect, by further detecting the room temperature and setting the heating capacity in the same manner as in the case of the third aspect of the present invention so as to obtain an optimum heat retaining temperature in consideration of the room temperature, the heating can be performed as compared with the room temperature. Since it is possible to prevent excessive heating and wasteful heating due to overshooting, it is possible to further save energy on heating for keeping the content liquid at a predetermined temperature.

In the above construction of the invention, the content liquid is heated by an AC power supply to keep the temperature. If the temperature is lower than the lower limit temperature, the content liquid is heated by the full-wave current to raise the temperature of the content liquid at a speed. Since the content liquid is cooled by heating by half-wave conduction at a temperature equal to or higher than the upper limit temperature and reducing the heating capacity by half, the content liquid can be kept in a predetermined temperature range between the upper limit temperature and the lower limit temperature, Even when the temperature of the content liquid is low, it is in a low-capacity heating state with half-wave energization. Therefore, when raising the temperature of the content liquid by full-wave energization while avoiding unnecessary heating in the half-wave energization state, the content liquid is heated from the low-capacity heating state by half-wave energization. Start up effortlessly and suppress overshoot And, it is possible to achieve a combined energy savings and can reduce the heating times of the full-wave energization. Moreover, it can be achieved at low cost by a simple circuit including the commutator and the thyristor.

[0022]

1 to 3 show a typical embodiment of an electric hot water storage container according to the present invention, and FIGS. 4 to 6 show one embodiment of control.

As shown in FIG. 1, the electric hot water storage container has a container 1 in which an inner container 2 is accommodated in an outer case 3.

The inner container 2 has an upper end flange received by a synthetic resin shoulder member 4 forcibly fitted to the upper end of the outer case 3.

A bottom ring 7 made of synthetic resin is applied to the lower end of the outer case 3, and the bottom ring 7 and the bottom of the inner container 2 are connected by a connecting metal fitting (not shown). And the bottom ring 7 are integrated with each other.

A bottom cover 10 is attached to the opening of the bottom ring 7 by fitting a plurality of claws provided on the bottom cover 7 and screwing at one place.

A rotating seat 9 is rotatably fitted to the outer peripheral portion of the lower surface of the bottom lid 10 by a plurality of claws provided on the bottom cover 10. When the housing 1 is fixed, the rotating seat 9 is mounted on the rotating seat 9. 1
Can be rotated lightly.

A bottom heater 8 is provided on the lower surface of the bottom of the inner container 2.
a and 8b are applied. These bottom heaters 8a, 8
Reference numeral b denotes a water heater and a heat retention heater, for example, each of the linear bottom heaters 8a and 8b are alternately wound around an annular mica plate, sandwiched between mica plates, and housed in a case.

A heat shield plate 32 is screwed under the bottom of the inner container 2 using a metal fitting 31, and a presser 35 is sandwiched between the heat shield plate 32 and the back sides of the bottom heaters 8a and 8b. Thus, the bottom heaters 8a and 8b are pressed against the bottom lower surface of the inner container 2. The pouring pump 11 is attached to a part of the heat shield plate 32.

The central through holes of the bottom heaters 8a and 8b have
A temperature sensor 33 for sensing the temperature of the content liquid is provided. The temperature sensor 33 is thermally isolated from the bottom heaters 8a and 8b by the heat shield wall 34, and accurately detects the temperature of the inner container 2 without the thermal influence of the bottom heaters 8a and 8b. I can do it.

A circuit housing box 40 is provided in the bottom ring 7 so as to open downward, and a circuit board 41 housed in the circuit housing box 40 is waterproofed against water leakage from above.

The control circuit 4 mounted on the circuit board 41
Reference numeral 2 denotes a microcomputer that uses a microcomputer 43 to control the operation of boiling and warming in response to an output signal from the operation board 18 and detection signals from various sensors, and to control the operation by displaying the operation and setting a timer. It is supposed to do. The operation board 18 is provided with a room temperature sensor 21 for detecting a room temperature.

At the upper end of the body 1, the body 1 formed by the shoulder member 4
The container body cover 6 which covers the mouth part 61 is provided. The inner peripheral portion of the opening 61 is formed on the tapered surface 65, and the outer peripheral edge of the outer plate 64 of the body lid 6 is also formed on the tapered surface 65.

With these tapered surfaces 65, the contact surfaces of the body lid 6 in the closed state are aligned with each other, and the outer surfaces of the shoulder member 4 and the body lid 6 are flush with each other at the contact boundary 67. Become. The body lid 6 is provided with hinge pins 68 on the shoulder member 4 at the rear.
It is pivotally mounted so that it can be opened and closed. The pivoting of the body lid 6 is performed on a bearing 69 integrally formed with the shoulder member 4, and the hinge pin 68 is attached to the bearing 6 with the body lid 6 opened.
9 can be attached and detached.

The attachment / detachment of the hinge pins 68 allows the attachment / detachment of the container body 6 to be attached / detached, thereby facilitating the cleaning of the inside of the container body 1 and the supply / discharge of the content liquid.

A lock member 71 is provided at the free end of the body lid 6 to advance and retreat the upper surface of the back plate 81 of the body lid 6 to lock the body lid 6 in a closed state.

The locking member 71 has a locking projection 72 integrally formed at the front end and a sliding contact surface 73a at the rear end 73.

The locking member 71 is pressed and urged by the spring 76 so that the locking projection 72 at the tip elastically engages with the engaging hole 70 formed in the shoulder member 4, and the body lid 6 is engaged with the shoulder member 4. Keep closed.

A cam portion 79b of a lock release lever 79 having an operation portion 79a is in contact with the rear end 73 of the lock member 71. The lock member 71 is rotatably pivoted by a shaft 78 to a bearing portion in the body lid 6.

The lock release lever 79 is used to lock the lock member 7.
1 is advanced to the engagement position by the spring 76, the operating portion 79a is
It is in a state flush with the surface of.

The inner container 2 is provided on the lower surface of the back plate 81 of the container lid 6.
A metal inner lid 85 that closes the rear of the
Screwed at 3. Outer periphery of inner lid 85 and back plate 81
A seal packing 84 facing the rim of the inner lid 85 is sandwiched between the inner lid 85 and the inner lid 85 contacts the rim of the inner container 2 with the seal packing 84 when the body lid 6 is closed. The inner container 2 is closed.

As shown in FIG. 3, a steam passage 87 is provided between the back plate 81 and the inner cover 85 to allow steam generated in the inner container 2 to escape to the outside.

The steam passage 87 has an opening 86 to the inner container 2 side in the inner lid 85 and an opening 52 to the outside on the upper surface on the rear side of the container lid 6.

A liquid reservoir 90 fitted into the opening 86 from below via a seal member 88 is pressed by a back plate 81.

The liquid reservoir 90 is annular and has a valve chamber 91 containing a water stop valve 92 for closing when the vessel 1 is overturned.
And a first area 93 divided into several sections, and the first area 93
Is formed around the second region 94.

Immediately downstream of the valve chamber 91, there is provided a pool portion 50 having a large space reaching the upper portion of the body lid 6. The pool portion 50 has a downstream outlet 51 that communicates with the opening 52 directed sideways, and has a reduced passage cross-sectional area.

Various arrangements have been made for the shape of the reservoir 50 with respect to the outlet 51 such that the reservoir 50 extends in the front, rear, left and right directions of the container 1 and the upper surface of the container cover 6. .

Thus, when the body 1 falls down to the front or rear, left or right and the water stop valve 92 at the time of falling moves to the position shown by the imaginary line, the liquid stoppage at the time of the water stop valve 92 is also stopped. When the content liquid is to flow out through the vapor passage 87 without being blocked, the content liquid to be flown out is stored in the storage section 50, and the flow-out to the downstream side is suppressed and prevented until the content liquid overflows.

Further, the first region 93 and the second region 94 of the liquid reservoir 90 suppress the outflow of the content liquid to the outside, and the time required to return the container 1 to a normal state before the outflow to the outside. Ample room can be given.

When opening the body cover 6, a finger is inserted into the upper surface opening 80 and the operation portion 79a is lifted, and the lock release lever 79 is rotated clockwise, and the lock release lever 79 is rotated.
The rear end portion 73 of the lock member 71 is pressed by the cam portion 79b.

As a result, the lock member 71 is pushed and retreats against the spring 76, so that the engagement between the engagement hole 70 and the locking projection 72 is released.

Further, when the operation section 79a is moved upward, the unlocked body lid 6 is opened. In addition, the spring 76 presses the lock member 71 by a natural operation of releasing the hand from the operation portion 79a, and the locking protrusion 72 is made to protrude from the free end of the body lid 6.

On the other hand, when closing the body lid 6, when the body lid 6 is rotated, the locking projection 72 is formed on the inner peripheral portion 62 of the edge of the shoulder member 4.
When the is inserted, it is projected and locked by the pressing force of the spring 76.

In this closed state, the base lid 6 is locked by the inner lid 85 provided on the inner surface side. In this closed state, the mouth of the inner container 2 is closed by the inner cover 85 provided on the inner surface side of the container cover 6. At this time, the seal packing 84 seals between the inner lid 85 and the mouth of the inner container 2.

The bottom of the inner container 2 is connected to a pouring path 12 for pouring the content liquid. The pouring path 12 stands in the space between the inner container 2 and the outer case 3 and rises into the beak-shaped protrusion 5 provided at the front of the shoulder member 4.

The beak-shaped protruding portion 5 protrudes from the shoulder member 4, and a passage cover 15 constituting a part of the beak-shaped protruding portion 5 is fitted in the downward opening. A lower cover 15a and a liquid injection guide 16 are integrally formed with the passage cover 15, and the discharge port 19a is covered with the outer surface of the container 1, and the discharge port 19a faces downward.

In the portion of the outlet 12 below the inner container 2, the content liquid flowing into the outlet 12 is filled with the discharge port 1.
A pouring pump 11 for feeding to 9a is provided, and is driven by a motor.

The discharge port 19a is made of silicone rubber having elasticity. An annular seal portion 20 is integrally formed in the middle of the discharge port 19a, and a projecting portion 19b is provided at a lower portion thereof.

The discharge pipe 19 is connected to the connecting pipe 14, and when the passage cover 15 is mounted on the beak-shaped projection 5, the projection 19 b comes into contact with the inner peripheral wall 16 c of the liquid injection guide 16. Also, at the edge of the upper opening 16a of the liquid injection guide 16,
The seal portion 20 abuts and is firmly held in a state where the pressing force is urged.

As a result, the upper opening 16a and the lower opening 16 of the liquid injection guide 16, which are the openings of the beak-shaped projection 5, are provided.
An annular gap G generated between b and the lower end of the discharge pipe 19 serving as a spout is sealed by the seal portion 20.

The discharge pipe 19 is provided with a slit 19c in the length direction of the discharge pipe 19 at a part of the end edge of the lower end. When the content liquid is discharged from the lower end, the discharge pipe 19 is opened to the atmosphere at the upper end of the slit 19c. As a result, it is possible to discharge as a quiet laminar flow without splash.

An operation panel 17 is provided on the upper surface of the beak-shaped protruding portion 5. The operation panel 17 is as shown in FIG. , Timer setting key 105, dispensing lock
A release key 106 and a liquid amount display 107 are provided. Boiling, descaling, and heat retention mode displays 108 to 110, and timer setting displays 111 to 113 for 9 hours, 6 hours, and 3 hours are provided.

The setting mode of the reboil / descaling setting key 104 and the dispensing lock / release key 106 is changed to a rotary type every time the key is operated.

FIG. 3 shows the control circuit 42. The microcomputer 43 includes an A / D converter 301, a switch circuit 303, a drive circuit 304, and a display circuit 305, as shown in FIG. Are connected as appropriate. The connected electric and electronic components include the temperature sensor 33 and the liquid amount detection unit 21.

An embodiment of the operation control in the electric hot water storage container shown in FIGS. 1 to 3 will be described below. FIG. 4 is a flow chart of the main routine showing the main operation control. After the power is turned on, the initial setting of step # 1 is performed, and then the processing corresponding to various inputs is performed (step # 4).
2).

Next, the boiling process (step # 3) is called, and if the content liquid is too low to reach the heat retention temperature in the heat retention mode or the temperature is lower than the predetermined temperature at which it takes a long time, that is, water supply When the temperature of the content liquid is low due to the initial or replenishment of the content liquid, or when the reboil is set by the reboil and descaling setting key 104, in the high capacity energized state by both the bottom heaters 8a and 8b,
Control so that it is heated at high speed until boiling. In the boiling mode, the amount of the content liquid is determined from the temperature rise characteristics and the like in the process of raising the temperature of the content liquid. This is so that when the timer is set, the boiling of the content liquid ends at a predetermined time,
Used to set the heating start time to the amount of the liquid content,
This is used because the heat retention is performed under the optimal heating condition according to the amount of the content liquid.

Subsequently, the heat retaining process (step # 4) is called, and after the initial boiling or re-boiling, the bottom heater 8a,
In the low-capacity energized state of only the bottom heater 8b for heating, the content liquid is controlled so as to be maintained at a predetermined heating temperature set in advance and to be heated under optimal conditions according to the amount of water. At this time, the water amount information determined in the boiling mode is shared, and the control and time for the water amount determination operation in the warming mode can be omitted, and the liquid content was also discharged in the warming mode. If the water volume is determined again and the optimal heating capacity is set according to the water volume to maintain the predetermined heat retention temperature, even if the water volume changes due to the discharge of the content liquid, energy-saving heating corresponding to this changes. Is achieved.
In some cases, the determination of the amount of water for empty cooking detection may also be used as the optimal heat retention, and the optimal heating capacity corresponding to the determined amount of water may be set when the cooking is not empty.

Further, when the timer processing (step # 5) is called and the timer is set by the timer setting key 105, the boiling operation start time is delayed until the time necessary for boiling the content liquid at the timer setting time. The delay control is performed so as to start the boiling operation from.

Next, the descaling process (step # 6) is called, and if the descaling mode is set by the reboil / descaling setting key 104, the step # 6 is executed.
The initial boiling operation when the content liquid in Step 3 is below a predetermined temperature,
The descaling mode set in the control circuit is executed separately from the above.

In this descaling mode, the energization capacity of the heater in the normal initial boiling mode is set to be lower than that in the initial boiling mode, and the rising speed of the boiling is reduced.

As a result, the calcium component can be efficiently volatilized in a low temperature range, and a boiling state can be obtained at the time when the calcium component has been diverted together with the odor.

Next, the pump process (step # 7) is called, and the operation of the dispensing operation key 102 causes the dispensing pump 11 to operate.
To make the dispensing take place.

Finally, after completing the other processes (step # 8), the process returns to step # 2, and the above control is repeated thereafter.

FIG. 5 is a flowchart showing a specific example of a subroutine of the heat retaining process. For example, as shown in FIG. 6, in the case of initial boiling in which the content liquid is boiled, and in the case of re-boiling, the heating capacity is set to 900 W, whereas in order to keep the content liquid after boiling at a predetermined temperature, an optimal heat retaining temperature, for example, 95 ° C, 80
° C, 70 ° C, and optimal heating capacity, eg, 30 W, 26
W, 20 W, etc., so as to obtain an optimal heat retaining state.

More specifically, in step # 11, the room temperature is measured based on the input from the room temperature sensor 21 and stored, and in step # 12, it is determined whether or not the amount of water has been reduced. Store. And step ♯
At 13 the water temperature is measured.

As a result, it is determined in step # 14 whether the heat retention temperature has risen due to a decrease in the amount of water. If NO, it means that the heat retention state has been continued without using the content liquid without being used, and in step # 15, from the count value that has been continued while the heat retention has been continued without this liquid supply, Judgment and storage of the heat retention continuation time without pouring.

Then, in step # 16, the optimum heating capacity W number is determined based on the room temperature and the heat retention duration.

For example, as for room temperature, when the room temperature is high, the heating capacity is set small, and when the room temperature is low, the heating capacity is set large. Since it is possible to prevent wasteful heating, it is possible to further save energy in heating the content liquid at a predetermined temperature.

Further, at the heat retention time immediately after the boiling, the heat retention temperature is set to an optimum temperature of 95 ° C. so as to be used as it is at first, or to be used after being reboiled in a very short time.
For that purpose, 30 W is set as an optimum and necessary heating capacity.

However, when the heat retention duration T1 has elapsed,
Since it can be determined that there is a high possibility that the battery will not be used for a long time and will not be used for a long time, the heat retention temperature is set to 80 ° C. and 26 W is set as the optimal heating capacity. In this way, by suppressing the heating so that when the non-use state lasts for a long time, the temperature becomes lower than the normal temperature.
Energy saving by avoiding wasteful heating that normally keeps the content liquid at a high eye temperature so that the content liquid is used as it is or used after being reboiled in a very short time Therefore, when the use is resumed by re-boiling, the rise of the content liquid to boiling can be remarkably accelerated as compared with the case of normal temperature, and the inconvenience due to energy-saving heat retention can be sufficiently suppressed.

Further, when the heat retention duration time T2 elapses,
Since it is more likely that the battery will not be used for a long time, the heat retention temperature is set to 70 ° C. and the heating capacity is set to 20 W, so that further energy-saving heat retention can be performed.

In such a state, even if the use is started or restarted by re-boiling as shown in FIG. 6, the content liquid is at 70 ° C. It is possible to stand up, and a difference of 25 ° C. from 70 ° C. to a normal heat retaining temperature of 95 ° C. is required only for an extra short time ΔT, which is a very short time. it can.

In order to perform the above-mentioned energy-saving and heat-retaining, the optimum heating capacity can be set in consideration of the difference in the amount of the content liquid. For example, when the amount of the content liquid is small, the heating capacity is reduced. By setting and setting the heating capacity to be large when the amount of the content liquid is large, it is possible to prevent overheating due to excessive heating compared to the amount of the content liquid, thereby preventing wasteful heating. In addition, it is possible to achieve energy saving on heating by keeping the content liquid after boiling at a predetermined temperature.

If the amount of water already detected in the boiling mode is adopted in the initial period of the heat retention, the optimum heating capacity can be set immediately after the transition to the heat retention mode, and the energy-saving heat retention can be started at an early stage.

If it is confirmed in step # 14 that the heat retention temperature has risen due to a decrease in the amount of water, the use has been resumed. Therefore, the count value of the heat retention continuation time and the set energy-saving W for the heat retention are maintained. The number is reset to return to the initial state of heat retention so that the above control is repeated.

FIGS. 7 and 8 show another embodiment of the operation control in the electric hot water storage container shown in FIGS.

FIG. 7 shows a subroutine of the heat retention process. If the W number flag is neither 2 nor 1 in steps # 21 and # 22, if the temperature is lower than the lower temperature limit, for example 90 ° C. in step # 23, step # 24 It is highly probable that the content liquid is full at the initial heat retention after the initial boiling, so 65W commensurate with this
Start normal heat retention with a heating capacity of
Increment. In the next step # 25, the T3 timer is started.
If the temperature is 5 ° C. or higher, the heating at 65 W is turned off, and the above operation is repeated until the T3 timer expires in step # 28. Therefore, 65 within a certain time T3 shown in FIG.
The number of times the heating of W is repeated is counted by the counter. This count number largely depends on the amount of the content liquid.

When the T3 timer expires, step # 29
The water amount is determined from the count number of the counter, and the counter is reset.

Next, the room temperature is determined in step # 30,
In step # 31, the W number, which is the optimum heating capacity, is set to, for example, 30 W as shown in FIG. 8 from the amount of water and room temperature. In step # 32, by applying the set number of W, excessive heating compared to the amount of water and room temperature is performed. Achieve no primary energy conservation.

Subsequently, at step # 33, the W number setting flag 1 indicating the end of the energy saving heat retaining operation is set, and the routine proceeds to step # 34, where it is determined whether or not the liquid content has exceeded the heat retaining temperature range.

If it exceeds, it is considered that the content liquid has been reduced by pouring, and the number of W is reduced by one rank in step # 35 to, for example, 26W shown in FIG. Achieve the next energy conservation heat retention. Thereby, it is possible to achieve energy-saving heat retention corresponding to the reduction of the content liquid.

Thereafter, the W number setting flag 2 indicating that such a secondary energy saving heat retaining operation has been performed is set in place of the W number setting flag 1, and the routine returns.

In step # 21, the W number flag is not 2,
If the number-of-W flag is 1 in step # 22, the primary energy saving operation is being performed, so the number-of-W flag is reset to 0 in step # 37, and the process proceeds to step # 30 to repeat the subsequent flow. If the number-of-W flag is 2 in step # 21, the secondary energy saving operation is being performed, so the number-of-W flag is reset to 0 in step # 38, and the process proceeds to step # 32. repeat.

The W number setting flag is reset to 0 by default.

FIG. 9 shows another embodiment of the present invention, and FIG. 10 shows one embodiment of the control in that case.

As shown in FIG. 9, a voltage signal v obtained by the temperature detected by the temperature sensor 203 is used to supply the heat to the heat retaining heater 201 by the AC power supply 202 to achieve the heat retaining mode.
1 and the reference voltage v2, the thyristor 204 is turned on via the transistor 205 while the content liquid is at or below the upper limit temperature of the heat retention, and the half through the commutator 207 is energized and the commutator 208, 209, The half-wave conduction in the opposite direction through the thyristor 204 controls the full-wave conduction state at, for example, 60 W as shown in FIG. 10. When the temperature exceeds the upper limit temperature, the control is released. 204 is turned off, and only through the commutator 207, for example, as shown in FIG.
It is controlled so as to be in a half-wave energized state at W.

As a result, a warm state in which the temperature changes as shown in FIG. 10 is obtained. In the boiling mode of the content liquid, power is supplied at 900 W using a dedicated water heater.

As described above, when the content liquid is heated by the AC power supply to keep the temperature, when the temperature is lower than the lower limit temperature, the content liquid is heated by full-wave energization to raise the temperature of the content liquid at a speed, and when the temperature is higher than the upper limit temperature, it is half. Since the content liquid is cooled by halving the heating capacity by heating by wave energization, the content liquid can be kept in a predetermined temperature range between the upper limit temperature and the lower limit temperature, especially when the content liquid is cooled. In the low-capacity heating state with half-wave energization, the rate at which the content liquid drops to the lower limit temperature is moderated so that the number of times that the content liquid needs to be heated with full-wave energization is reduced, so the half-wave energization state When heating the content liquid by full-wave energization while avoiding unnecessary heating, the content liquid is heated from a low-capacity heating state by half-wave energization. Suppress the shoot, It can be coupled achieving energy savings and can reduce heat number.

In addition, the commutator 207 and the thyristor 204
And can be achieved at low cost by a simple circuit.

[0100]

According to the first aspect of the present invention, the amount of water is also determined in the warming mode while also judging whether or not the air is cooked. By setting the heating capacity to obtain the heat retention temperature in accordance with the determined water volume, it is possible to perform optimal heating corresponding to the actual amount of the liquid content in the heat retention mode in the water volume detection that also serves as the empty cooking determination. It is preferable because the optimal heating can be achieved even when the amount of the content liquid changes at the time of the heat retention mode. The setting of the heating capacity according to the amount of water is, for example, to set the heating capacity to be small when the amount of the content liquid is small, and to set the heating capacity to be large when the amount of the content liquid is large. In proportion to the quantity,
It is possible to prevent the heating from being excessive and causing overshooting to cause waste in the heating, and it is possible to achieve energy saving in heating for keeping the content liquid at a predetermined temperature.

According to the second aspect of the present invention, the amount of water is determined in the boiling mode or in the heat retaining mode immediately after boiling, and the optimum heating is performed in the boiling mode and the heat retaining mode with the heating capacity according to the water content. The amount of water is determined when the liquid is dispensed, and the heating capacity for obtaining the predetermined heat retention temperature is set according to this determination. Heating can be performed more preferably.

According to the third aspect of the present invention, in addition to any one of the first and second aspects of the present invention, by further detecting the room temperature and setting the optimum heating capacity in consideration of the room temperature,
For example, if the room temperature is high, set the heating capacity to be small, and if the room temperature is low, set the heating capacity to be large. Since this is prevented, further energy saving can be achieved in heating for keeping the content liquid at a predetermined temperature.

According to the fourth aspect of the present invention, when the heat retention is continued for a predetermined time in the non-use state in which the operation of discharging the content liquid is not performed, the optimum heat retention temperature for the preset non-use heat retention state is obtained. By setting the heating capacity taking into account the liquid volume of the content liquid, the content liquid can be used as it is by suppressing heating so that the temperature will be lower than the normal temperature when the non-use state continues for a long time Waste, or excessive heating with respect to the amount of water, which usually keeps the content liquid at a high eye temperature so that it can be re-boiled in a very short time. By avoiding this, energy savings can be achieved, and for resumption of use by re-boiling, the rise of the content liquid to boiling can be much faster than at room temperature, and the inconvenience due to energy saving heat retention can be sufficiently suppressed. it can.

According to the fifth aspect of the present invention, in addition to the fourth aspect of the present invention, a room temperature is detected, and the heating capacity is set so as to obtain an optimum heat retaining temperature in consideration of the room temperature. By setting the same in the case of the invention, it is possible to prevent excessive heating and overshooting as compared to room temperature, thereby preventing wasteful heating, so that further energy saving on heating for keeping the content liquid at a predetermined temperature is prevented. Can be planned.

According to the sixth aspect of the present invention, when the content liquid is heated by an AC power source to keep the temperature, if the temperature is lower than the lower limit temperature, heating is performed by full-wave energization to raise the temperature of the content liquid at a speed. Heating by half-wave conduction at a temperature higher than the upper limit temperature and lowering the content liquid by halving the heating capacity, it is possible to keep the content liquid in a predetermined temperature range between the upper limit temperature and the lower limit temperature, particularly, the content Even when the temperature of the liquid drops, it is in a low-volume heating state with half-wave energization. When raising the temperature of the content liquid by full-wave energization while avoiding wasteful heating in the half-wave energization state, the content liquid is heated from a low-capacity heating state by half-wave energization. To prevent overshoot, It can be coupled achieving energy savings and can reduce the heating times of a wave power.
Moreover, it can be achieved at low cost by a simple circuit including the commutator and the thyristor.

[Brief description of the drawings]

FIG. 1 is a sectional view of an electric hot water storage container as one embodiment of the present invention.

FIG. 2 is a sectional view showing an operation panel unit of FIG. 1;

FIG. 3 is a diagram of the control circuit of FIG. 1;

FIG. 4 is a flowchart showing a main routine showing one embodiment of main operation control of the control circuit of FIG. 3;

FIG. 5 is a flowchart of a warming processing subroutine of FIG. 4;

6 is a graph showing a change in the heating state and a change in the temperature of the content liquid due to the heat retaining process of FIG. 5;

FIG. 7 is a flowchart showing another embodiment of the heat retention processing subroutine of FIG. 4;

8 is a graph showing a change in the heating state and a change in the temperature of the content liquid due to the heat retaining process of FIG. 7;

FIG. 9 is a circuit diagram showing a control circuit of the electric hot water storage container as another embodiment of the present invention.

10 is a graph showing a change in the heating state and a change in the temperature of the liquid content in one embodiment of the heat retaining process by the control circuit of FIG. 9;

FIG. 11 is a circuit diagram showing a control circuit of a conventional electric hot water storage container.

12 is a graph showing a change in the heating state and a change in the temperature of the content liquid in the heat retaining process by the control circuit of FIG. 11;

[Explanation of symbols]

 2 Internal containers 8a, 8b Bottom heater 21 Room temperature sensor 33 Temperature sensor 42 Control circuit 43 Microcomputer 201 Insulation heater 202 AC power supply 203 Temperature sensor 204 Thyristor 207 Commutator

Claims (6)

(57) [Claims] 1. An electric hot water storage container having a boiling mode in which a content liquid is heated and boiled, and a heat retention mode in which the content liquid is heated so as to keep the content liquid at a predetermined temperature. An electric hot water storage container characterized in that the amount of water is determined again, and a heating capacity for obtaining a predetermined warming temperature is set according to the determination. 2. A boiling mode in which the content liquid is heated and boiled, and a heat retention mode in which the amount of water is determined in the boiling mode or in a heat retention mode immediately after boiling to heat the content liquid to a predetermined temperature. In the electric hot water storage container, in the heat retaining mode, when the operation of discharging the content liquid is performed, the amount of water is determined again, and a heating capacity for obtaining a predetermined heat retaining temperature is set according to the determination. container. 3. The electric hot water storage container according to claim 1, wherein a room temperature is detected, and the heating capacity is set in consideration of the room temperature. 4. An electric water storage container having a boiling mode in which a content liquid is heated and boiled, and a heat retention mode in which the content liquid is heated so as to keep the content liquid at a predetermined temperature. When the heat retention is continued for a predetermined time in the non-use state where the heating is not performed, the heating capacity is set such that a preset heat retention temperature in the non-use heat retention state is obtained according to the amount of water at that time. container. 5. The electric hot water storage container according to claim 4, wherein the heating capacity is set so as to obtain the heat retention temperature in consideration of the room temperature. 6. An electric hot water storage container having a heat retaining mode in which a liquid content is heated by an AC power supply and kept at a predetermined temperature, wherein heating is performed by full-wave conduction below a lower limit temperature and heating by half-wave conduction above an upper limit temperature. An electric hot water storage container, characterized in that: