JPH0634745Y2 - Electric hot water storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electric hot water storage container capable of boiling water.

(Prior Art) This kind of electric hot water storage container indicates the heat-retention state, the boiling operation state at the time of containing a low-temperature content liquid, and the re-boiling operation by turning on a dedicated lamp. Is being done.

In addition, as an electric hot water storage container, it has been widely used as an electric pot with a boiling water function, and it is widely used, and the control by a microcomputer is adopted, and there are various modes such as a descaling mode and a timer mode that reserves a time for boiling water. It has multiple modes with modes. This multi-functionalization also complicates the display.

Japanese Laid-Open Patent Publication No. 58-108338 discloses, as one of the multi-functions, a display function for calculating the time required for boiling in the boiling water mode and displaying it.

(Problems to be solved by the invention) However, even if it can be confirmed that it is in a boiling water state, it is still inconvenient for the user because he / she does not know when the content liquid boil.

By the way, the time required until boiling depends on the liquid amount and the liquid temperature, and the liquid temperature is also necessary for heating control in the boiling water mode and the heat retention mode, and switching control between both modes. Factor detection is essential. It is convenient for the user to detect and display such factors in a timely manner.

However, even if the liquid amount is separately displayed, there is no one that displays the liquid temperature like the one described in the above-mentioned publication, and it is desired to display the remaining time required until boiling is also subtracted. In addition, if the liquid temperature is separately displayed, the complexity of the display is increased due to the multi-functionality, which is not convenient for the user.

The present invention provides a display of the detected liquid amount or liquid temperature, a display of the time required for boiling determined from these, and a subtraction display of the display time based on the elapsed time from the time display point. It is an object of the present invention to provide an electric hot water storage container which can be used by the display means and is convenient to use.

(Means for Solving the Problem) In order to achieve the above-mentioned problems, the present invention has means for detecting the liquid amount and displaying the detected liquid amount. Necessary time determination means for determining the time required until boiling based on the detected liquid amount, and the display means instead of the liquid amount display for the determined required time, the display time from the time display point The first feature is that a control means for performing subtraction display based on the elapsed time is provided.

In order to achieve the above-mentioned problems, the present invention has means for detecting the liquid temperature and displaying the detected liquid temperature, and in the boiling water mode, the boiling is performed based on the detected liquid temperature according to the display. A required time determining means for determining the required time,
The second feature is that the determined required time is displayed by the display means instead of the liquid temperature display, and the display time is subtracted and displayed based on the elapsed time from the time display time point. It is a thing.

(Operation) In the above-mentioned configuration of the first feature of the present invention, the liquid amount is detected, and the detected liquid amount is displayed by the display means.
In the boiling water mode, the time required for boiling is determined by the determination means, and the control means operates to display the determined required time instead of the display of the liquid amount by sharing the display means, and, Since this display time is subtracted and displayed based on the elapsed time from the time display time, based on the detection of the liquid amount, the liquid amount, the required time until boiling in the boiling mode,
Also, the remaining time is displayed, which is convenient for use, and these displays are performed by one display means as needed, so that the display is simple and easy to see, which is convenient for the user.

In the above-mentioned configuration of the second feature of the present invention, the liquid temperature is detected, and the detected liquid temperature is displayed by the display means.
In the water heating mode, the time required for boiling is determined by the determination means, and the control means operates to display the determined required time in common with the display means instead of displaying the liquid temperature, and Since this display time is subtracted and displayed based on the elapsed time from the time display time, based on the detection of the liquid temperature, the liquid temperature, the required time until boiling in the boiling mode,
Also, the remaining time is displayed, which is convenient for use, and these displays are performed by one display means as needed, so that the display is simple and easy to see, which is convenient for the user.

(Embodiment) A first embodiment of the present invention shown in FIGS. 1 to 4 will be described.

In this embodiment, as shown in FIG. 1, the heater 1 is attached to the bottom surface of the bottom of the inner container 2, and a heater driving circuit 92 is mounted on the heater 1 by a control circuit 91 (FIG. 3) including a microcomputer (hereinafter referred to as a microcomputer) 66. The internal solution is energized and controlled so that the inner solution is heated at an appropriate time and at an appropriate temperature so that it can be kept warm.

The inner container 2 is housed and held in the outer case 3 to form a body 4. The mouth portion 2a of the inner container 2 is connected to the upper end of the outer case 3 by a shoulder member 5 made of synthetic resin, and an outer lid 7 is pivotally attached to a rear hook-shaped bearing 9 of the shoulder member 5 by a shaft 6 so as to be openable, closable and detachable. ing. An inner lid 8 provided on the opening 2a of the inner container 2 is attached to the lower surface of the outer lid 7, and is opened and closed integrally with the outer lid 7.

Inside the outer lid 7, a bellows pump 11 which is pushed by an upper surface pressing plate 10 of the outer lid 7 is provided, and the inner container 2 is provided through an air supply passage 13 provided between the inner lid 8 and the bellows pump bottom plate 12. Pressurized air is sent inside to pressurize the content liquid. The air supply passage 13 is provided with a steam vent passage 15 that leads to the upper surface of the outer lid 7 through a branch hole 14 so that steam generated during heat retention and boiling by the heater 1 is released to the outside.
The inside does not rise abnormally.

The branch hole 14 is switched and closed with the air supply port 16 of the bottom plate 12 of the bellows pump by a valve 36 that is moved downwards in conjunction with the pressing operation of the bellows pump 11, so that pressurized air is discharged from the vapor discharge passage when the content liquid is pressurized. It does not happen that steam escapes to 15 or steam enters the bellows pump 11 when the hot water is stored.

A lead-out path 17 for guiding the pressurized content liquid to the upper outside of the inner container 2 is provided by connecting the base end to the bottom of the inner container 2, communicates with the inner container 2 and the upper end is open to the outside. As a result, the content liquid 42 in the inner container 2 always flows in and maintains the same level. A synthetic resin elbow 20 is connected to the upper end of the lead-out path 17. The elbow 20 is connected to an inverted U-shaped tube 23 fixed to the back side of the beak-shaped portion 5a of the shoulder member 5 which extends to the one side like a beak. The inverted U-shaped tube 23 is an elbow
Immediately above the connection with 20 has a built-in water stop valve 25 at the time of fall,
The downward discharge port 19 of the tip of the inverted U-shaped pipe 23 is formed with a slit 26 on its front surface side which extends from the lower end to a position higher than the full water position of the inner container 2.

A pipe cover 27 surrounding the beak-shaped portion 5a is provided below the beak-shaped portion 5a of the body 4, and is fitted to the beak-shaped portion 5a and the outer case 3 of the body 4. At the bottom of the pipe cover 27, a liquid injection guide pipe 24 that receives the liquid discharged from the discharge port 19 of the inverted U-shaped pipe 23 in an open state to the atmosphere and flows downward is detachably attached from below.

The slit 26 is also involved in the reception in the open state to the atmosphere, and surely prevents the siphon, the splash phenomenon, and the content liquid blowing in the case of rapid pouring. The liquid injection guide tube 24 is detachably fitted to the beak-shaped portion 5a of the shoulder member 5, receives the liquid discharged from the discharge port 19 with a reasonably large diameter, and thereafter gently squeezes downward while squeezing appropriately. Let it flow down.

The air supply passage 13 is provided with a water stop valve 29 at the time of fall.

The rising part of the outlet path 17 for the content liquid is the liquid level detection part 17b,
It is made of an insulating material. Specifically, glass may be used, but resin has a higher dielectric constant and is more likely to obtain a capacitance change, and it is possible to suppress the indeterminacy of the liquid surface level caused by the rise due to the surface tension around the liquid surface. The liquid level detector 17b is connected to the bottom of the inner container 2 via a straight connecting pipe 17c made of synthetic resin, a curved pipe 17a made of metal, an elbow 17d made of synthetic resin, and a connecting port 17e made of metal.

Here, an aluminum foil 41 is wound around the outer circumference of the liquid level detection unit 17b to form a first electrode, and the bent tube 17a electrically connected to the content liquid in the liquid level detection unit 17b serves as a second electrode. The first electrode 41 and the content liquid 42 in the liquid level detecting portion 17b communicating with the second electrode 17a face each other via the insulating peripheral wall of the liquid level detecting portion 17b, and the size of the facing area, that is, the content liquid 42 The electrostatic capacity is obtained according to the height of the liquid level.

The difference in electrostatic capacity depending on the liquid level is that the first and second electrodes 41 and 17a are controlled by the microcomputer 6 of the control circuit 91 as shown in FIG.
By connecting to 6 via encoder A, it is input to the microcomputer 66. As a result, the microcomputer 66 judges the liquid level of the content liquid by the input corresponding to the difference in the electrostatic capacity, and the light emitting diode 42 ₁ for external display connected to the microcomputer 66 via the display circuit B according to the judgment. , 42 ₂ … 42
₆ is driven to display the liquid level externally. In particular, in order to prevent empty cooking, when the liquid level is lowered to the extent that water needs to be supplied, the light emitting diode 80 for water supply is turned on to prompt water supply. For the determination of the liquid level, it is easy to make a table of the relationship between the capacitance and the liquid level at a necessary stage, and make the determination based on this table.

Emitting diode 42 _{1-42 6} are to be lit and displayed through the display window 44 with the fender panel 43 attached fitted to the front of the outer body 1.

Under these indicators, boiling, high temperature insulation, 80 ° C insulation,
Each display lamp 46, 47, 79, 80 for water supply is on the panel
It is provided so as to perform lighting display through the window 49 of 43, and these are also connected to the microcomputer 66 through the display circuit B for each display.

On the other hand, the heater 1 is divided into a warming heater 1a and a boiling water heater 1b, and is connected to a microcomputer 66 via a heater driving circuit 92. By simultaneously energizing both heaters 1a and 1b, the content liquid is boiled until boiling. Therefore, by energizing only the heat retention heater 1a, the content liquid can be heated and kept at a predetermined temperature before boiling.

The energization in the boiling water state is detected by the temperature sensor 68 (Figs. 1 and 3). When the liquid temperature is considerably lower than the heat retention temperature and the temperature is required to boil the water, the reboil switch 45 When the temperature sensor 68 is turned on
When the boiling temperature is detected, it is returned to the heat retention state.

The energization in the heat retention state energizes the heat retention heater 1a while the temperature sensor 68 detects a temperature equal to or lower than a predetermined heat retention temperature, and stops the current application to the heat retention heater 1a when the predetermined heat retention temperature is detected.

In addition, the heat retention temperature is a high temperature insulation to obtain hot water of about 93 to 95 ℃ immediately after boiling suitable for making coffee, or a normal temperature of about 80 ℃ suitable for making tea a little lower than that. Whether the temperature is kept at 80 ° C for hot water can be set by the heat retention selection switch 69.

The heater drive circuit 92 performs the above-mentioned boiling and heat retention,
It has switching transistors 101 and 102 that are turned on and off by the microcomputer 66. The switching transistor 101 turns on and off the relay 103 to turn the relay contact 10
The heater 1b is turned on and off by boiling water by 3a. The switching transistor 102 turns on / off the relay 104 and turns on / off the heat retention heater 1a by the relay contact 104a.

Each switch for re-boiling and heat insulation selection for these energization controls 4
5 and 69 operation buttons 45a and 69a are provided in the vicinity of the display light emitting diodes 46, 47, 79 and 80, and the switches 45 and 6 are provided.
9 and the temperature sensor 68 are connected to the microcomputer 66 via the switch circuit C, the water amount sensor circuit D, and the temperature sensor circuit E. Boiling can also be detected by a steam sensor that detects the temperature of steam. A transparent resin cover sheet 48 is applied to the front surface of the panel 43, and the back surface of the panel 43 is printed with annotations for various displays.

Further, on the outer peripheral surface of the shoulder member 5, there is provided a 7-segment type countdown display section 105 for displaying a countdown of the time required until boiling in the case of boiling water. The display unit 105 is also connected to the microcomputer 66 via the display circuit B, and the microcomputer 66 counts down the time required to boil water according to the content liquid temperature detected by the temperature sensor 68 during operation. The unit 105 is controlled. For this display, it is preferable to tabulate the relationship between the content liquid temperature and the time required until boiling. An example of this tabulation is shown graphically in FIG.
When the content liquid reaches the boiling state, display the required time to 0.
To

The time required for the content liquid to actually boil depends on the amount of liquid. Therefore, the table is set for each appropriate liquid amount, and the table is selectively used according to the detected liquid amount. As a result, the time required until boiling can be properly displayed as a countdown according to the difference in the liquid amount.

In short, in the present embodiment, in boiling the internal solution, it is determined and displayed that the time required for boiling differs depending on the liquid amount and the liquid temperature. You can know when it will boil. Further, since the time display required for boiling is subtracted and displayed with the lapse of time, it is possible to inform the user of how much water the heated water will boil. Therefore, it is convenient because other cooking can be performed while watching the time required for boiling and the remaining required time.

However, the time required for boiling can be relatively accurately determined even if the time required until the boiling is performed only by one of the liquid amount and the liquid temperature. Further, the elements for knowing the time required for boiling are not limited to these, as described below.

On the other hand, the boiling state of the inner solution can be detected by judging the temperature rise rate change of the temperature sensor 68 by the microcomputer. In this case, since the rate of temperature rise at the boiling point also changes depending on the liquid amount of the inner solution, it is advisable to tabulate the relationship between the amount of liquid and the temperature rise rate at the boiling point for use in the above determination. This judgment is made by the temperature sensor
It is preferable to start at a temperature of about 90 ° C., which is sensed by 68.

The liquid amount of the internal solution can be determined from the difference in the temperature rise rate of the temperature sensor 68 corresponding thereto. A second embodiment of the present invention will be described in which the time required until boiling is counted and displayed by adopting such a determination method.

First, when the initial water temperature is 20 ° C. and the relationship between the liquid volume V of the internal solution and the time required for boiling T ₁ is as shown in FIG. Assuming that the relationship between the initial temperature t at each liquid volume and the time required for boiling T ₂ is as shown in FIG. Is.

Therefore, the required time T until boiling at each temperature for each liquid volume is Can be expressed as

From this relationship, the time required for boiling depending on the liquid amount can be displayed as a countdown as the temperature of the inner solution rises.

The specific control will be described based on the flowchart of the countdown display subroutine shown in FIG.

In the case of a so-called general boiling water operation that does not depend on the reboil switch 45 (step # 1), the water temperature is determined, the water amount is determined, and the required time T until boiling is calculated and set accordingly (steps # 2 to # 4). . Then, after displaying the set time T on the countdown display 105 (step #
5) Then, the display time on the display unit 105 is counted down in real time every 2 minutes until it reaches 90 ° C (steps # 6 and # 7), and when it reaches 90 ° C, the water amount determination and the water temperature determination are performed again. Then, the time required until boiling is calculated T and the display on the display unit 105 is corrected (step # 8).

Next, it is judged whether or not the water is boiling every 1 minute, and if it is not boiling, the display is corrected in step # 8 (step #
9, # 10). Therefore, the display correction of step # 8 is repeated every one minute until boiling.

When boiling is confirmed in step # 10, the time display of the display unit 105 is set to 0 in step # 11 to notify boiling. A buzzer may be connected to the microcomputer 66 for this notification.

Hereinafter, some examples that are effective for performing the above display will be described.

A third embodiment of the present invention shown in FIGS. 8 and 9 is a shoulder member 5
As shown in FIG. 8, a 7-segment type display section 151, a reboil operation button 152, and a temperature confirmation operation button 15 are provided on the outer surface of the
3, operation members such as the heat retention selection operation button 154 and the boiling water timer setting operation button 155 are centrally arranged.

The display unit 151 is normally used to display the liquid amount of the content liquid as shown in FIG. 9A, and when the temperature confirmation operation button 153 is operated, the temperature set by the heat retention selection operation button 154, for example, 95 ° C. Is displayed as shown in FIG. 9 (b). This display is automatically continued for a predetermined time or until any operation button is operated.

When the boiling water timer setting operation button 155 is operated, the time until the scheduled time to obtain the liquid content having the predetermined temperature after boiling is set, and the time set at that time is shown in FIG. 9 (c). ), And thereafter, as time elapses, the countdown is displayed as shown in FIG. 9 (d). The display of the set time is switched to the rotary type each time the button 155 is operated so that the desired time can be set from among several types.

Further, when the heat retention selection operation button 154 is operated, the heat retention temperature can be selectively set to 80 ° C. and 95 ° C. higher than that, and the temperature set at that time is also displayed on the display unit 151 as shown in FIG. 9 (e). To be done. Each time the button 154 is operated, the display of the heat retention temperature is switched to the rotary type so that the heat retention temperature can be set to either 80 ° C or 95 ° C.

When the reboil operation button 152 is operated, the reboil display light emitting diode 156 is turned on to display it.

In the fourth embodiment of the present invention shown in FIGS. 10 to 12, the time until boiling in the boiling state is displayed as a countdown, and the discharge amount of the content liquid is digitally displayed in a specific case.

Therefore, as shown in FIG. 10, in addition to the outlet path 17 for the content liquid, a communication passage 201 dedicated to liquid level detection is connected to the inner container, and the liquid amount of the content liquid is adjusted from beginning to end without being affected by the flow of discharge liquid. To be able to detect. The liquid amount detection method may be detected by the change of the electrostatic capacity as in the first embodiment, but other known methods may be used.

In addition to the display similar to that of the third embodiment, the display unit 151 presses the usage amount switch button 202 (Fig. 11) in a normal state where the liquid amount of the content liquid is digitally displayed, and a dispensing operation is performed. In this case, the amount of used liquid discharged by this pouring operation is displayed.

The main part of the control flow for this purpose is shown in FIG.
Specifically, based on this, when the usage amount switch button 202 is operated in the normal liquid amount display state (step # 21), the display on the display 151 is set to 0.0L, and the usage amount switch button 202 is operated. After that, the decrease of the internal capacity is sequentially judged by the microcomputer, and it is displayed as a usage amount (switches # 22, # 23, # 24). After that, for example, when 5 minutes have elapsed after the operation of the usage amount switch button 202, it is determined that the content liquid has been used up, and the normal liquid amount display is restored (switches # 25, # 21). The judgment of the end of use of the content liquid is arbitrary such as by operating a special switch button.

The display unit 151 is provided right next to the usage amount switch button 202 and the reboil switch button 49a provided on the panel 43.

The fifth embodiment of the present invention shown in FIGS. 13 to 16 is provided with a clock display unit 301 having a timer function, and the scheduled boiling time can be set in real time, and the boiling operation starts at the time of reboil operation. The time required from the point of time until boiling is displayed as the remaining time. It is also used to display the temperature when setting the heat retention temperature.

More specifically, the display unit 301 is provided below the panel 43, and the boiling display unit 46 and the heat retention display unit 302 are provided below the display unit 301. Further below that, a reboil switch button 49a, a heat retention selection switch button 69a for setting a heat retention temperature, a time setting button 303, and a set button 304 are provided.

The display unit 301 normally displays a clock as shown in FIG. When the time setting button 303 is operated in this state, the time display changes, and when the set button 304 is pressed, the time displayed when the button is pressed is set as the boiling target time, and the boiling ends at that time. The heater is controlled.

When the heat retention selection switch button 69a is operated, the display unit 301
Is displayed as 100 ° C, and this is sequentially displayed as a drop. When the set button 304 is pressed, the temperature displayed as shown in Fig. 15 is set as the heat retention target temperature, and that temperature The heater is controlled to keep the liquid.

Further, when the reboil switch button 49a is operated in a warm state, the liquid amount is determined by the rising gradient of the liquid temperature from the set warm temperature, the heater control time corresponding to it is set, and the remaining time until boiling is set. Display as shown in Figure 16.

In short, the present invention, in the various concrete examples shown in the above embodiments, has the display unit 151 or 301 as a means for detecting the liquid amount and displaying the detected liquid amount. Required time determination means by the microcomputer 66 or the like to determine the time required until boiling based on the detected liquid amount according to, and the display means 151 or 301 instead of the liquid amount display the determined required time, Microcomputer that subtracts and displays this display time based on the elapsed time from the time display
The first feature is that a control means such as 66 is provided.

In the first feature of the present invention, the amount of liquid is detected, and the detected amount of liquid is displayed by the display means 151 or 301. In the boiling water mode, it is necessary for the boiling by the judgment means such as the microcomputer 66. The time to be determined is determined,
Instead of displaying the liquid amount by the control means such as the microcomputer 66 working, the determined required time is displayed in common with the display means 151 and 301, and this display time is based on the elapsed time from the time display time point. As the subtraction display is made, based on the detection of the liquid amount, the liquid amount, the required time until boiling in the water boiling mode, and the remaining time are displayed, which is convenient for use.
These displays are performed by one display means as needed, and the displays are simple and easy to see, which is convenient for the user.

Further, the present invention has means 151 or 301 for detecting and displaying the liquid temperature instead of the liquid amount, and in the water heating mode, the microcomputer 66 or the like for judging the required time until boiling based on the detected liquid temperature. And a control means by a microcomputer 66 or the like that displays the required time by the display means 151 or 301 instead of the liquid temperature display and subtracts the displayed time based on the elapsed time from the time display time point. The second feature is that the and are provided.

With this, based on the detection of the liquid temperature instead of the detection of the liquid amount of the first feature, the liquid temperature, the required time until boiling in the water boiling mode, and the remaining time are displayed, which is convenient for use. These displays are performed by one display means 151 or 301 as needed, and the displays are simple and easy to see, which is convenient for the user.

(Effect of the Invention) According to the first feature of the present invention, the liquid amount is detected, and the detected liquid amount is displayed by the display means. In the water heating mode, it is necessary for the determination means to boil. When the time to be determined is determined, the control means operates to display the determined required time instead of the display of the liquid amount by sharing the display means, and this display time is displayed as the elapsed time from the time display time point. Since the subtraction display is performed based on the liquid amount, the liquid amount, the required time until boiling in the water boiling mode, and the remaining time are displayed, which is convenient for use, and these displays are one display means. By doing so, the display is simple and easy to see, which is convenient for the user.

According to the second feature of the present invention, the liquid temperature is detected, the detected liquid temperature is displayed by the display means, and the time required for boiling is judged by the judging means in the boiling water mode. In addition, the control means operates to display the determined required time instead of the display of the liquid temperature by sharing the display means, and the display time is subtracted and displayed based on the elapsed time from the time display time point. On the basis of the detection of the liquid temperature, the liquid temperature, the required time until boiling in the water boiling mode, and the remaining time are displayed, which is convenient for use, and these displays are displayed as needed by one display means. The display is simple and easy to see, which is convenient for the user.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a perspective view, FIG. 3 is a control circuit diagram, and FIG. 4 is a table showing the relationship between the liquid amount and the time required until boiling. Graph shown by
FIGS. 7 to 7 show a second embodiment of the present invention, FIG. 5 is a graph showing the relationship between the amount of liquid and the time required until boiling, and FIG. 6 is the initial temperature of the content liquid and the time required until boiling. FIG. 7 is a flowchart of a countdown display subroutine, FIG. 8 is a perspective view of a portion of a hot water storage container showing a third embodiment of the present invention, and FIG. 9 shows various display states of the display section. FIG. 10 is a schematic view of a hot water storage container showing a fourth embodiment of the present invention, FIG. 11 is a partial front view of a resin panel, and FIG.
FIG. 13 is a flowchart, FIG. 13 is a partial front view of a resin panel showing a fifth embodiment of the present invention, and FIGS. 14 to 16 are front views showing various display states of the display unit. 1 …… Heater 1a …… Heat retention heater 1b …… Boiler heater 42 …… Content liquid 49 …… Reboil switch 66 …… Microcomputer 68 …… Temperature sensor 91 …… Control circuit 92 …… Heater drive circuit 151,301 …… Display

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-1-141334 (JP, A) JP-A-58-108338 (JP, A) JP-A-56-157730 (JP, A) SAIKAI HEI1- 135031 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A required time determination for determining the amount of liquid required and displaying the detected amount of liquid, for determining the time required until boiling based on the detected amount of liquid related to the display in the boiling water mode. Means and a control means for displaying the determined required time by the display means instead of the liquid amount display, and subtracting and displaying the displayed time based on the elapsed time from the time display time point. Electric hot water storage container. 2. A required time determination means for detecting a liquid temperature and displaying the detected liquid temperature, and determining a time required until boiling in the boiling water mode based on the detected liquid temperature according to the display. Means and a control means for displaying the determined required time by the display means instead of the liquid temperature display, and subtracting and displaying the displayed time based on the elapsed time from the time display time point. Electric hot water storage container.