JP3180618B2 - pot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pot used in general households and the like.

[0002]

2. Description of the Related Art FIG. 8 shows a circuit diagram of a general pot in the prior art. The pot shown in FIG.
0V AC power supply 1, liquid storage container 2, electric pump 3,
When the hot water supply switch 4 is turned on, a current is supplied from the power supply 1 to the electric pump 3 via the hot water supply switch 4 and the electric pump 3 operates, so that the inside of the liquid storage container 2 is turned on. It pumped out hot water.

That is, when the user wants to use the hot water in the liquid storage container 2 of the pot, the user turns on the hot water supply switch 4 so that the electric pump 3 operates and the hot water can be easily poured. .

[0004]

However, in such a conventional technique, when the power supply 1 is not connected or in the case of a power failure, the electric pump 3 is turned on even if the user turns on the hot water supply switch 4. Has no current supplied to it, so that it becomes impossible to pour hot water from the pot.

When the user operates various switches in a state where the power supply 1 is removed, the apparatus does not respond at all, and various setting values are displayed by display means such as an LED. Also, it is impossible to produce sound by a piezoelectric buzzer or the like.

Normally, when the power supply 1 is removed from the pot, the temperature of the hot water in the liquid storage container does not immediately decrease.
Although it is possible to maintain a sufficiently practical hot water temperature for about a time, since the function of each part of the apparatus is stopped as described above when the power supply 1 is removed, high-temperature water is stored in the liquid storage container. Despite its existence, it has been extremely difficult for users to utilize the hot water.

The present invention has been made in view of such a problem, and is intended for use in a state where the power supply is disconnected, such as when carrying a pot to a place where there is no AC power supply, or when using the pot during a power failure. Also, it is intended to improve usability by enabling the use of functions such as an electric hot water supply function provided in the pot.

[0008]

Means for solving the above-mentioned problems include a detachable power supply, a power storage circuit, a liquid storage container, a converter having an input connected to the power storage circuit, and a liquid storage device. It has an electric pump that draws out the liquid in the container, and an electric buzzer that emits an alarm to the user, wherein the power storage circuit is charged by the current from the power supply, and the electric pump and the electric buzzer are connected to the converter. Connected to an output terminal, the converter has a choke coil, a switching element, a diode, and a drive circuit, both ends of a series circuit of the choke coil and the switching element are input terminals, and the converter is an output terminal. One terminal of the series circuit of the diode is connected to a connection point between the choke coil and the switching element, and the other terminal is connected to one terminal of the input terminal. The power is supplied to the electric pump and the electric buzzer in a state where the power is cut off, and the drive circuit periodically turns on and off the switching element. Is smaller than the steady-state ON time ratio, the electric sounding means operates after a predetermined time has elapsed since the start of the converter, and during the predetermined time, the output voltage of the converter It is set to a value higher than a value required for the sounding means to emit a sufficient volume.

[0009]

According to the present problem solving means, when pouring the hot water, even in a state in which power is split off it is supplied electric energy from the storage circuit to operate the electric pump, the pumping liquid from reservoir vessel Can be used comfortably, and even when the voltage of the power storage circuit is low,
By operating the step-up converter, the voltage supplied to the electric pump can be made substantially constant, so that good tapping performance can be ensured. Moreover,
When starting the converter, by gradually increasing the ratio of the on-time of the switching element from a predetermined value, no matter what value the voltage of the power storage circuit has, an overvoltage is applied to the electric pump at the time of starting the converter. No overcurrent or overvoltage is applied or applied to each element constituting the converter. Further, the electric sounding means includes:
Since the converter operates after a predetermined period of time has elapsed since the start of the converter, the output voltage of the converter has sufficiently increased. It can be of a sufficient size.

[0010]

FIG. 1 is a block diagram of a pot in a first reference example. In FIG. 1, the power source 21 is 100V5
It comprises an AC power supply 22 of 0 or 60 Hz and a magnet type connector 23 which is easy to attach and detach. The output of the power supply 21 is connected to the charging circuit 24, and the output of the charging circuit 24 is connected to the power storage circuit 25.

The charging circuit 24 includes a transformer for converting an AC voltage to a low voltage, a rectifying circuit for converting the output of the transformer to a DC, and the like. In the present embodiment, the storage circuit 25, a large capacity using an electric double layer capacitor 6
1, 62 and 63. The electric pump 27 is connected from the electric storage circuit 25 through the converter 40 and further through the switch 14 constituted by, for example, a power transistor.

The converter 40 connects a choke coil 41 and a switching element 42 realized by an NPN-type transistor in series.
3 and output. In the converter of the present embodiment, between its output terminals, electrolytic capacitor 44
Is connected, and an electrolytic capacitor 45 is also connected between the input terminals of the converter 40. When a HIGH signal is input from the control circuit 13, the drive circuit 46 outputs an on / off signal of the switching element 42, and has an action of causing the output voltage of the converter 40 to reach a predetermined value. When a LOW signal is input from the control circuit 13, the driving circuit 4
6 keeps its output LOW and switches 42
Is kept non-conductive.

The electric pump 27 draws out the liquid in the liquid storage container 35. In the present reference example, the liquid storage container 3
Reference numeral 5 denotes a configuration in which heating is performed by the heater 36.

The heater 36 is connected from the power source 21 via a switching element 34 such as a relay. In the present reference <br/> embodiment, the heater 36 is of a power of 1000W, in the state containing water in the liquid storage container 35 and has an output of only able to boil water.

Both the switching element 14 and the switching element 34 are configured to be turned on and off by a control circuit 13 constituted by a microcomputer LSI (large-scale integrated circuit).

The power supply detecting means 30 is connected to the output of the power supply 21, and when there is an output of the power supply 21, that is, when the AC power supply 22 is connected by the connector 23, the control circuit 13 is set to HIGH. When the connector 23 is removed or the AC power supply 22 is not output due to a power failure or the like, LOW is output to the control circuit 13.

A push-button switch 12 is also connected to the control circuit 13. In this embodiment, the push-button switch 12 is located near the outlet of the electric pump 27 so that the user can easily operate the switch. Position.

The control circuit 13 turns on the switching element 14 while the push button switch 12 is being pressed.

The operation of the above configuration will be described.
First, the user puts water into the liquid storage container 35, and then connects the connector 23.

Then, the output of the power supply 21 becomes 100 V, a charging current is supplied to the power storage circuit 25 via the charging circuit 24, and the charging of the power storage circuit 25 starts. At this time, the switching element 34 is turned on by the control circuit 13, and the AC voltage of 100 V is also supplied to the heater 36, so that the heater 36 generates 1000 W of heat to heat the liquid storage container 35, The water in the liquid storage container 35 reaches boiling.

In the case of boiling, the control circuit 13 turns off the switching element 34, thereby completing the water heating operation.

In this state, when the user wants to use hot water, the user pushes the push button switch 12.

Then, the switching element 14 is turned on by the operation of the control circuit 13, so that the electric pump 27 operates and draws out hot water in the liquid storage container 35, so that the user receives the hot water with a cup. This makes it possible to drink tea and the like.

Here, the switching element 14 is kept on by the operation of the control circuit 13 during the period in which the push button switch 12 is on.
The operation of the electric pump 27 is also continued.

When the user stops pressing the push button switch 12 at the time when the required amount of hot water is supplied, the switching element 14 is turned off at that time by the operation of the control circuit 13, so that the electric pump 27 is turned off. Stops and returns to the initial state.

When the power supply 21 is connected, the power supply detecting means 30 sends a HIGH signal to the control circuit 13.
Is transmitted, the signal VC connected from the control circuit 13 to the drive circuit 46 becomes LOW by the operation of the control circuit 13, and the output of the drive circuit 46 is fixed to LOW. Reference numeral 42 denotes an off state.

Next, the operation when the connector 23 is removed will be described. In this case, the charging circuit 24
Since it does not operate, the power storage circuit 25 is not charged, and the charging circuit 25 is in a state where the energy that was being charged when the power supply 21 was connected is accumulated.

In this state, when the user operates the push button switch 12, the control circuit 13 operates and receives a LOW signal from the power supply detecting means 30 to drive the drive circuit 46.
Is set to HIGH. Therefore, even when converter 40 operates and the voltage of power storage circuit 25 is slightly lower, the output voltage of the predetermined voltage value higher than the output voltage of power storage circuit 25 is increased by the boosting operation of converter 40. Will be secured. At the same time, the control circuit 1
3, the switching element 14 is turned on,
Therefore, the electric pump 27 operates almost in the same manner as when the power supply 21 is connected.

[0029] Figure 2, in the present embodiment, there is shown the operation of each unit waveform. (A) shows the waveform of the signal voltage from the control circuit 13 to the drive circuit 46, (b) shows the output voltage waveform of the drive circuit 46, and (c) shows the time change of the ratio of the output ON time of the drive circuit 46. (D) Converter 4
It shows an output voltage waveform of 0.

As shown in FIG. 2, at time t1,
When the signal to the drive circuit 46 becomes HIGH, the drive circuit 4
The HIGH period of the output of No. 6 is initially small, increases with time, and eventually falls to a constant value. In the present reference example, the drive circuit 46 uses a method generally called separately excited type and has an oscillation circuit inside. Therefore, since the oscillation frequency is constant, the waveform of FIG. Although the width of the pulse gradually increases, its repetition period is almost constant. Therefore, as seen in (c), the ratio of the ON time of the switching element 42 is initially small, gradually increases, and then falls to a constant value.

Incidentally, the value at which the on-time ratio finally settles down depends on the input voltage of the converter 40, that is, the power storage circuit 2
5 and also depends on the forward voltage drop of the diode 43. Generally, the input voltage VI, the output voltage VO, the forward drop voltage VF (≒ 0.4V ... present embodiment the diode 43 in order to enhance the efficiency of the converter 40, the diode 43, V
A Schottky barrier diode with a small F and excellent reverse recovery characteristics is used. ), The ratio D of the ON time of the switching element 42 is D = (VO + VF-VI) / (VO + VF).

[0032] In the present embodiment, the output voltage VO is, 7
Although V is set to a constant value, the terminal voltage of the power storage circuit 25 changes in the range of 2.5 V to 7 V because the voltage value of the large-capacity capacitor changes according to the amount of stored power. It is assumed.

Therefore, the value of the ratio D of the final settling on time varies in the range of 0.05 to 0.66.

However, the switching element 42
If the on-time ratio D is suddenly generated at the time t1, the charging current of the capacitor 44 becomes very large, and the magnitude of the current flowing through the switching element 42 becomes very large. It can be destroyed. In order to prevent this, it is necessary to use the switching element 42 having a considerable current withstanding capacity.
The size of the apparatus and the cost are high.

[0035] In this reference example, as shown in FIG. 2, the ratio of the minimum on-time since it is set to about 3%, it is not necessary to current withstand of the switching element 42 is a special large, steady Since a device having a current rating required for the device can be used, the device can be realized with a minimum necessary size and the cost can be reduced.

[0036] In addition, in the present embodiment, the drive circuit 46,
The output voltage of the converter is detected, and the output voltage is controlled in a non-feedback manner so that the value becomes substantially constant. Therefore,
Upon detecting that the ratio of the on-time is 3% at the initial stage of the startup and the output voltage value of the converter 40 is lower than a predetermined value (7 V) as it is, the drive circuit 40 gradually increases the ratio of the on-time. When the output voltage value finally reaches a predetermined value (7 V), the increase of the on-time ratio is stopped, so that various loads connected to the output terminal of the converter 40 can be controlled. Also, there is no possibility of destruction by applying an overvoltage.

[0037] In this way, the pot of this reference example, the power supply 2
Even when 1 is removed, by supplying the electric energy stored in the power storage circuit 25 to the electric pump 27, hot water can be discharged almost in the same manner as when the power supply 21 is connected. Due to the operation of 40, the supply voltage to the electric pump 27 can be maintained at a substantially constant value even when the voltage between the terminals of the power storage circuit 25 slightly changes, so that the tapping performance is excellent, convenient and safe.

[0038] In the case where the power supply 21 is removed, the heater 36, the supply of electric power is not performed, in this case the reference example, response to the output of the power sensing means 30 is in the LOW Since the control circuit 13 turns off the switching element 34 formed of a relay, the current flowing through the coil of the relay is also cut, so that no useless current is supplied. The configuration is such that the burden is reduced.

[0039] In this reference example, although using a push-button switch 12, not necessarily those that must be used those in this form, provided for example, as the knob, hand it The contact may be closed by rotating the contact.

Further, in the present embodiment uses the electric double layer capacitor to the storage circuit 25, and not necessarily have to use this kind of thing, for example, lead-type secondary battery, nickel A storage battery such as a CADNICA battery or a lithium ion secondary battery may be used.

FIG. 3 is a block diagram of a pot in the second reference example. In FIG. 3, a valve 51 is provided in the middle of a flow path 50 leading to the outlet of the electric pump 27, and when a tapping command means 54 constituted by a push button 52 is pressed, a tapping signal is mechanically generated by the microswitch 5.
3 and the valve 51, so that they are configured to move in conjunction with each other.

The boost converter 60 converts the input voltage from the power storage circuit 25 to a higher voltage and outputs the same. The structure is the same as that of the converter 40 of the first structure, and is relatively simple, low cost, and high. The configuration is such that efficiency can be realized.

[0043] In the present embodiment, when the microswitch 53 is turned on, the switch 14 by the action of the control circuit 13
Is turned on.

When the user does not press the tapping means 54, the microswitch 53 is turned off and the valve 51 is closed. However, when the user presses the tapping instruction means 54, the microswitch 53 is turned on and the valve 51 is opened.

The operation of the above configuration will be described.
When the power supply 21 is connected and when the power supply 21 is not connected, the basic operation is the same as that of the above-described first reference example, and the description thereof will be omitted, and only different points will be described. To

Regardless of whether the power supply 21 is connected or disconnected, as long as the apparatus operates normally,
When the electric pump 27 is operating with the switch 14 turned on, the valve 51 is open and hot water is supplied. When the switch 14 is off, the electric pump 27 is turned off.
Is stopped, but in this state, the valve 51 is closed.

Next, the operation in the case where the device fails and the power transistor forming the switch 14 is short-circuited will be described.

In this case, the current is supplied from the power storage circuit 25 through the diode 43 in the boost converter 60 even when the power supply 21 is disconnected, as well as when the power supply 21 is connected. Then, current is supplied to the electric pump 27 via the switch 14 in the short state.

Although the switching element 42 of the boost converter 60 is kept off,
In the configuration described above, even if the switching element 42 remains off, the input voltage (that is, the terminal voltage of the power storage circuit 25) comes out as it is. (Strictly speaking, the down occurs only by the voltage drop in the forward direction of the diode 43.) Therefore, particularly when a high voltage is stored in the power storage circuit 25, the electric pump rotates and the liquid storage container 35 Trying to pump out hot water.

However, in this state, unless the user presses the push button 52 of the tapping means 54, the valve 5
1 is closed, no matter how much the electric pump 27 rotates, no hot water flows outside.

[0051] Thus, the pot of the present reference example, while taking a relatively simple and inexpensive circuit construction of, even if the failed part of the circuit, can be prevented to cause tapping accidentally.

In the above description, an example was given in which the switch 14 failed and a short circuit occurred. However, the same applies to the case where the microswitch 53, the control circuit 13 and the like failed. Although rotation of the pump 27 occurs, erroneous tapping can be prevented by the action of the valve 51.

Next, a third reference example will be described. Third
The circuit of the reference example is completely the same as that of FIG.
The only difference is that, instead of the valve 51 in FIG. 3, a change valve that changes the way of opening the flow path according to the amount of the push button 52 is provided is provided.

FIG. 4 is a graph showing the characteristics of the change valve. The abscissa indicates the amount of pressing as the magnitude of the signal. With a push of up to 1 mm, the fully closed state is maintained, and from 1 mm to 4 mm, the opening of the flow path gradually increases, so that the resistance of the flow path decreases.

The micro switch 53 is turned on when the push button 52 is pressed by 0.3 mm or more.

The operation of the above configuration will be described.
Also in this case, the operation is basically the same as the operation in FIG. 3, and the user presses the push button 52 of the tapping instruction unit 54 regardless of whether the power supply 21 is connected or disconnected. Depending on the volume, the way the valve opens changes, and thus the resistance of the flow path 50.

When the electric pump 27 operates, the flow path 50
When the resistance of the hot water changes, the speed of the hot water passing through the flow path 50 changes,
The amount of hot water per unit time changes.

[0058] In this reference example, pressing a lot of push button 53, the resistance of the flow path 50 is reduced, thus the volume of the melt teemed per unit time is large.

[0059] In addition, in the present embodiment, the amount of press is 0.3mm
In the case of １1 mm, since the flow path 50 is fully closed, it is possible to prevent erroneous tapping when a part of the circuit breaks down as in the second reference example, so that the safety is extremely high. A pot can be realized.

[0060] In the present embodiment, as shown in FIG. 4, with respect to the amount of pressing, since the magnitude of the resistance of the flow path 50 has an outline inverse curve, the volume of the melt teemed per unit time is, There is also an effect that it can be obtained in proportion to the pressed amount.

In general, the electric pump has a characteristic that when the applied voltage is changed, the intensity of the operation is changed, so that the amount of hot water per unit time can also be changed. However, in a boost converter circuit having a simple configuration as in this reference example, the lower limit of the output voltage is almost equal to the input voltage of the boost converter (that is, the terminal voltage of the power storage circuit). , It becomes impossible to realize.

[0062] However, in the present embodiment, by using the variable valve, while using the boost converter relatively simple structure, since the volume of the melt teemed per unit in accordance with the operation amount of the user's time changes, The tapping speed can be freely changed.

Thus, a low-cost and convenient pot can be provided. FIG. 5 is a block diagram of a pot showing a fourth reference example. 5, the basic configuration is the same as that of FIG.
Is connected to a load circuit 62 including an LED (light emitting diode) using an LED (light emitting diode) and a spotlight 61 for indicating a position where hot water comes out to the user by spot illumination of light. The on / off state of the current supply to the circuit 62 can be controlled, and the spotlight 61 is turned on when the output VL of the control circuit 13 becomes HIGH.

The operation of the above configuration will be described.
In this reference example, with the power supply 21 disconnected,
When the user presses the push button 52, the micro switch 53 is turned on, and the control circuit 13 operates as follows.

First, the output terminal VC is set to HIGH to activate the boost converter 60, and then the output terminal VL is set to HI
A current is supplied to the load circuit 62 as GH. Load circuit 6
When the spotlight 61 is turned on, when the user sets a container such as a cup for receiving hot water at the outlet of the hot water,
Its location is clearly visible, very convenient and safe.

Next, after about one second, the output terminal VM of the control circuit 13 becomes HIGH, the switch 14 is turned on, the electric current is supplied to the electric pump 27, and the operation starts. In this reference example, as in FIG.
1 is provided, but when the user presses the push button 52, the valve 51 is in an open state, and the hot water in the liquid storage container 35 Hot water is discharged via the valve 50 and the valve 51.

When the user stops pressing the push button 52, the control circuit 13 sets the VL, VM, and VC output terminals to LOW, stops the boosting operation of the boosting converter 60, and turns off the switch 14. By doing so, the rotation of the electric pump 27 is stopped, and the current supply to the load circuit 62 is stopped, that is, the spotlight 61 is turned off. In this reference example, when the push button 52 returns to the state where it is not pressed, the valve 51
Is also closed.

[0068] Thus, in the present embodiment, a load circuit 62 constructed in accordance with the spotlight 61, when it is desired to operate at least one of the electric pump 27, by a signal from the control circuit 13, boost converter 60 By operating and boosting the terminal voltage of the power storage circuit 25 to supply these components, the brightness of the spotlight 61 of the load circuit 62 can be sufficiently ensured, and the electric pump 27 has a sufficient tapping performance. Can be demonstrated.

[0069] In the present embodiment, the load circuit 62
Is constituted by the spotlight 61, but it is not always necessary to use such a thing. Various kinds of display circuits, alarm circuits, microcomputers, etc. can be used, and in short, the power supply 21 is cut off. At some point, if at least one of them needs to operate, a boost operation by boost converter 60 is performed,
By boosting the terminal voltage of the power storage circuit 25, the voltage value applied to these components can be maintained at a sufficient value, so that various load circuits and the electric pump can operate with sufficient performance. It becomes.

FIG. 6 is a block diagram of a pot showing the first embodiment. In FIG. 6, an electric sounding means 65 constituted by a piezoelectric buzzer is connected to the output of the boost converter 60, and the output terminal VB of the control circuit 13 is set to HIGH.
When it becomes H, a sounding operation is performed and the user “beep”
It is configured to emit such a warning sound. Others
This is the same as the configuration in FIG.

The operation of the above configuration will be described.
FIG. 7 shows an operation waveform diagram when the push button 52 is pressed in a state where the power supply 21 of the pot of the present embodiment is cut off. In FIG. 7, (a) and (b)
The waveforms (c) and (d) are the same as those in FIG.
In FIG. 1, a state in which the ratio of the ON time of the switching element 42 is gradually increased by the operation of the drive circuit 46 after the start signal is input to the boost converter 60 is shown.

(E) shows the control circuit 13 output signal VB to the electric sounding means 65. In the present embodiment, at time t2, VB is set to HIGH, and the electric blowing means 65 is operated. In this embodiment,
The steady-state value of the output voltage VO of the boost converter 60 is 7 V, but t2 is set to 0.4 seconds from t1 so that VO completely reaches the steady-state value. In the configuration of the boost converter 60 of the present embodiment, the time required for VO to settle to a steady value differs depending on the terminal voltage of the power storage circuit 25. When the terminal voltage of the power storage circuit 25 is high, the VO However, when the value is low (in this embodiment, the minimum value is 2.5 V), the time until the steady state becomes longer. In the present embodiment, the boost converter 60 is configured to reach a steady value within 0.4 seconds from the start-up even under the 2.5V condition described above.
At the time when 5 works, the value of VO has reached the steady value of 7 V, so that the electric sounding means 65 can be operated at a sufficient volume. By this alarm, the user can confirm the reaction from the pot in response to the pressing of the push button 52 by sound, and the feeling of use is extremely good.

In this embodiment, particularly when the output voltage value of boost converter 60 has reached a sufficiently steady state value,
Since the electric sounding means 65 is operated, the sound volume is stable, but if the sound volume stability up to that point is not required, the electric sounding means 65 may be operated before the VO reaches a steady state. It may be.

In this case, especially when the terminal voltage of the power storage circuit 25 is low, the sound volume may be slightly low, or the sound volume during the audible alarm generation period may rise. If you can inform, you can do it.
Even in such a case, the volume of the audible alarm can be secured far more than when the electric sounding means is activated from time t1. Therefore, a safe and high-quality pot can be provided.

In this embodiment, the electric buzzer 65 uses a piezoelectric buzzer, but may use another type of sound generator.

[0076]

As is apparent from the above embodiments , in particular, a detachable power supply, a power storage circuit, a liquid storage container, a converter having an input connected to the power storage circuit, and a liquid in the liquid storage container An electric pump for pumping the electric power, and an electric sounding means for issuing a warning sound to a user, wherein the electric storage circuit is charged by a current from the power supply, and the electric pump and the electric sounding means are connected to an output terminal of the converter. The converter has a choke coil, a switching element, a diode, and a drive circuit, and has both ends of a series circuit of the choke coil and the switching element as input terminals, and the converter has a series connection of an output terminal and the diode. One terminal of the circuit is connected to a connection point between the choke coil and the switching element, the other terminal is connected to one terminal of the input terminal, and the power is turned off. In this state, the power is supplied to the electric pump and the electric sounding means, and the drive circuit periodically turns the switching element on and off.When the converter is started, the on-time ratio of the switching element is fixed. The electric sounding means is operated after a predetermined time has elapsed since the start of the converter, and the output voltage of the converter is sufficient for the electric sounding means to be sufficient for the predetermined time. By making the volume equal to or more than the value required to emit the volume, when pouring hot water, the electric pump operates even when the power is cut off, so that it can be used comfortably and the power storage circuit can be used. Even when the voltage is low, the voltage supplied to the electric pump can be kept substantially constant by operating the boost converter, so It is possible to ensure the hot water performance. And when starting the converter,
By gradually increasing the on-time ratio of the switching element from a predetermined value, an overvoltage is applied to the electric pump or the converter is activated when the converter is started, regardless of the voltage of the power storage circuit. Since no overcurrent or overvoltage is applied to each of the constituent elements, a highly reliable pot can be realized, and the electric sounding means has an output voltage value of the converter that is sufficient for the electric sounding means. Since the operation is performed after the volume is raised to a voltage that can be emitted to the user, a sufficient volume alarm is generated for the user even when the power supply is not connected. Is convenient and secure.

[Brief description of the drawings]

FIG. 1 is a block diagram of a pot according to a first reference example of the present invention.

FIG. 2 is an operation waveform diagram of a pot in the first reference example of the present invention.

Block diagram of the pot in the second reference example of the present invention; FIG

FIG. 4 is a characteristic diagram of a pot push button according to a third reference example of the present invention.

Block diagram of the pot in the fourth reference example of the present invention; FIG

FIG. 6 is a block diagram of a pot according to the first embodiment of the present invention.

FIG. 7 is an operation waveform diagram of the pot in the first embodiment of the present invention.

FIG. 8 is a block diagram of a pot according to the related art.

[Explanation of symbols]

 14 Switch 21 Power Supply 25 Electric Storage Circuit 27 Electric Pump 35 Liquid Storage Container 40 Converter 41 Choke Coil 42 Switching Element 43 Diode 46 Drive Circuit 50 Flow Path 51 Valve 60 Boost Converter 62 Load Circuit 65 Electric Sounding Means

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takayumi Fukuda 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuyuki Shimada 1006 Odaka Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Inside the company (72) Inventor Sadatoshi Taen 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-7-123608 (JP, A) JP-A-57-132762 (JP, A) JP-A-3-106313 (JP, A) JP-A-3-268712 (JP, A) JP-A-60-87083 (JP, A) JP-A-5-220049 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A47J 27/21-27/212

Claims (1)

(57) [Claims] 1. A detachable power supply, a power storage circuit, a liquid storage container, a converter having an input connected to the power storage circuit, an electric pump for pumping a liquid in the liquid storage container, and an alarm to a user. The electric storage circuit is charged by a current from the power supply, the electric pump and the electric sounding means are connected to an output terminal of the converter, and the converter includes a choke coil, a switching element, , A diode, and a drive circuit, and both ends of a series circuit of the choke coil and the switching element are input terminals, and the converter is configured such that the choke coil and the switching element connect one terminal of a series circuit of an output terminal and the diode. And the other terminal is connected to one terminal of the input terminal, and the electric pump and the electric Power is supplied to the sounding means, the drive circuit periodically turns on and off the switching element, and when the converter is started, the ratio of the on time of the switching element is smaller than the ratio of the on time in the steady state. The electric buzzer operates after a predetermined time has elapsed since the start of the converter, and the predetermined time is such that the output voltage of the converter is equal to or higher than a value necessary for the electric buzzer to emit a sufficient volume. Pot.