JP3463350B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a rechargeable vacuum cleaner, etc.
It can be used for devices that use secondary batteries with high rate discharge,
The present invention relates to a vacuum cleaner such as an AC / DC dual type.

[0002]

2. Description of the Related Art Conventionally, when the current capacity is small, a battery pack is provided with a circuit for measuring the charging and discharging quantities, and in the case of a lead storage battery, the remaining capacity is simply calculated from the battery voltage. There was something to display.

A control circuit of a conventional rechargeable vacuum cleaner will be described below.

FIG. 2 shows a control circuit of a conventional vacuum cleaner. In FIG. 2, reference numeral 51 is a control circuit in a conventional vacuum cleaner main body, 54 is a conventional battery pack with a battery capacity remaining amount display function, which is used by connecting to the control circuit 51 in the vacuum cleaner main body by a connector 53. Is a motor inside the electric vacuum cleaner, which is ON / OFF controlled by the switch 52, 11 is a secondary battery built in the battery pack 54, which supplies all electric power when the electric vacuum cleaner is operating, 58 is the secondary battery 1
1 is a resistor for detecting the charging / discharging current, 56 is the polarity of the potential generated across the charging / discharging current detecting resistor 58 at the time of charging / discharging the secondary battery 11, and the microcomputer 55 is in charge or discharge state. A charging / discharging state detection circuit 57 for detecting the above is for amplifying the potential difference generated in the charging / discharging current detection resistor 58 during charging / discharging so that the microcomputer 55 can measure the charging / discharging current value. The current value amplifier 59 is a battery capacity remaining amount display circuit for notifying the user of the vacuum cleaner of the battery capacity remaining amount calculated by the microcomputer 55.

The control circuit of the vacuum cleaner configured as described above uses the battery pack 54 and the vacuum cleaner main body 51 when charging.
When the battery is removed and charged with the charger, the charge amount is calculated from the charge current and the charging time.When discharging, the discharge amount is calculated from the discharge current and the discharging time, and the difference between the charge amount and the discharge amount is calculated. Is displayed by the battery capacity remaining amount display circuit 59.

[0006]

However, in the above-mentioned conventional configuration, the expensive charge / discharge quantity measuring display circuit is in the battery pack which is a consumable item, so that the cost is high for the user and the remaining battery capacity is low. Although it is understood, the time when it can actually be used is unclear, and there is a problem that it is not convenient.

The present invention solves the above-mentioned conventional problems. The battery pack does not require a special circuit, and the initial voltage change at the time of discharge is observed and the dischargeable capacity, that is, the continuous usable time is calculated and displayed. other etc., for the purpose of subjecting Hisage rechargeable electric vacuum cleaner that can inform the user a lot of battery information.

[0008]

In order to achieve this object, the invention according to claim 1 of the present invention provides a motor and a secondary battery.
And voltage detection means for detecting the discharge voltage of the secondary battery
And a detection result of the voltage detection means and a voltage stored in advance.
A microcomputer for comparing the pond discharge voltage characteristics,
Display circuit driven by the microcomputer
And the microcomputer includes the secondary battery
The discharge voltage of the battery and its change
After comparing and evaluating the characteristics, calculate the continuous usable time,
Electricity for displaying the continuous usable time on the display circuit
It is a vacuum cleaner.

The invention according to claim 2 of the present invention is a secondary
A voltage control circuit is provided between the battery and the motor to control the voltage.
A circuit controls the power consumption of the motor.
This is a vacuum cleaner.

The invention according to claim 3 of the present invention is the voltage
The detection means has a function of detecting the battery pack identification signal,
By providing the identification means in the battery pack, a backup battery
The electricity according to claim 1, wherein the pond pack can be identified.
It is a vacuum cleaner.

[0011]

In this structure, the invention according to claim 1 of the present invention is provided.
According to the light, it is possible to inform the user the possibility of continuous use time, come out can be a measure of the way of cleaning.

According to the second aspect of the present invention, by controlling the power consumption of the motor, the electric vacuum cleaner can be operated in accordance with the user's desired usage time . Claim 3
According to the invention described above , by adding the battery identification function to the battery pack , even if a spare battery is used, the battery life and
Informs the user of insufficient power and refresh time
It

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are designated by the same reference numerals.

In FIG. 1, 10 is a motor inside the vacuum cleaner body, 11 is a secondary battery that supplies all the electric power of the vacuum cleaner, and 12 is a microcomputer 2 inside the vacuum cleaner body.
1 is a variable resistor for identifying a battery pack, 13 is a battery pack according to the present invention, 14 is a battery pack identification signal terminal according to the present invention, 15 is a connection between the battery pack 13 and an internal circuit 25 of the vacuum cleaner body. The connector 16 is connected to the variable resistor 12 inside the battery pack when the battery pack 13 is connected to the main body of the vacuum cleaner, and the fixed resistor 16 generates an identification voltage for the microcomputer 21 to identify the battery pack. Reference numeral 17 is a voltage detection circuit for detecting a battery voltage and a battery pack identification signal, 18 is an output of the voltage detection circuit 17, and is a battery voltage signal and a battery identification signal. 19 is a power consumption control signal for the microcomputer 21 to control the DC converter 20. 20 is a DC controller that controls the voltage supplied to the motor 10 by the power consumption control signal 19 from the microcomputer 21. Reference numeral 21 is a microcomputer according to the present invention, 22 is a memory for storing the transition of the dischargeable capacity of a battery, 23 is a display circuit according to the present invention, 24 is an operation switch of a vacuum cleaner according to the present invention, and 25 is an electricity according to the present invention. This is the internal circuit of the vacuum cleaner.

The operation of the control circuit of the rechargeable vacuum cleaner configured as described above will be described. First, the user sets the battery pack identifying variable resistor 12 to an arbitrary value. When the battery pack 13 is connected to the vacuum cleaner main body control circuit 25, the variable resistor 12 and the fixed resistor 16 set the battery pack identification signal. The battery pack identification signal and the battery voltage are input to the microcomputer 21 by the voltage detection circuit 17.

Next, when the microcomputer 21 receives a driving instruction from the operation switch 24, the power consumption control signal 19 is sent to the DC converter 20 for driving the main body motor 10 while observing the battery voltage signal and the battery identification signal 18. . The microcomputer 21 observes the discharge voltage of the battery and the amount of change per unit time, compares and evaluates with the previously stored battery discharge voltage characteristic, calculates the battery discharge capacity and the continuous usable time, and displays it on the display circuit 23. It is displayed and the battery pack identification value and the battery dischargeable capacity are also displayed in the memory 22.
Remember. After the operation is completed, the battery pack 13 is removed from the electric vacuum cleaner, charged by the charger, connected to the electric vacuum cleaner main body control circuit 25 again, and then the electric vacuum cleaner is operated. .

The microcomputer 21 compares and evaluates the data thus accumulated with the cycle life characteristic data stored in advance, and estimates the life of the battery or lacks the charge when necessary or by an instruction from the operation switch 24. , The information at the time of refreshing is displayed on the display circuit 23. By the way, when the spare battery pack 13 is used, by setting the battery pack identification variable resistor 12 to different settings, the microcomputer 21 can have different battery packs 13.
Data in the memory 22.

When the user gives an instruction for continuous use time from the operation switch 24, the microcomputer 21 calculates the power that can be continuously consumed from the dischargeable capacity of the battery, and D
The voltage value of the C converter 20 is controlled.

It is easily conceivable that the accuracy of the calculation evaluation result can be further improved by considering the temperature characteristic of the battery when the continuous usable time is calculated and evaluated from the battery discharge voltage characteristic of the present invention.

[0020]

As described above, the invention according to claim 1 of the present invention is as follows.
According to Ming, since the electric vacuum cleaner has a function of measuring the remaining battery capacity , it is possible to reduce the cost burden on the user and inform the user of the continuous usable time. Since it has it, it can be used as a standard for cleaning, and the battery capacity can be used effectively. According to the second aspect of the invention, by controlling the power consumption of the motor, it is possible to operate the electric vacuum cleaner according to the user's desired usage time .
According to the invention described in claim 3, by adding the battery identification function to the battery pack , the secondary battery can be used even if the spare battery is used.
From the discharge voltage characteristics of transition of the battery, the life of the battery, the charging non
You can inform the user when your feet are refreshed.
Therefore , it is an excellent electric sweep that is more user- friendly and easy to use.
It is possible to realize the removal machine .

[Brief description of drawings]

FIG. 1 is a circuit diagram of a control circuit of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a control circuit of a conventional vacuum cleaner.

[Explanation of symbols]

10 motors 11 Secondary battery 12 variable resistors 13 Battery pack 16 fixed resistors 17 Voltage detection circuit 20 Voltage control circuit (DC converter) 21 Microcomputer 22 memory 23 Display circuit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-3-173522 (JP, A) JP-A-2-249521 (JP, A) JP-A-1-160324 (JP, A) Actual development Sho-62- 177478 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 5/24 A47L 9/28

Claims (3)

(57) [Claims] 1. A motor, a secondary battery, and a secondary battery
Voltage detecting means for detecting a discharge voltage, and the voltage detecting means
Compare the detection result of the battery with the previously stored battery discharge voltage characteristics.
The microcomputer to be compared, and the microcomputer
And a display circuit driven by the
(B) The discharge voltage of the secondary battery and its change
The amount of charge was observed and compared with the discharge voltage characteristics of the battery.
After that, the continuous usable time is calculated and the continuous usable time is calculated.
An electric vacuum cleaner that displays the distance on the display circuit. 2. A voltage control circuit is provided between the secondary battery and the motor.
The voltage control circuit controls the power consumption of the motor.
The vacuum cleaner according to claim 1, which is controlled. 3. The voltage detecting means detects the battery pack identification signal.
It has a function to take out and an identification means is provided in the battery pack.
This made it possible to identify spare battery packs.
The electric vacuum cleaner according to claim 1.