JPH10228337A - Computer case with uninterruptive power function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect data of a computer by providing a slot in a free space of the computer case and situating a battery there, and supplying necessary electric power to the computer for a certain time even in case of a power failure of commercial AC input. SOLUTION: The primary coils of high-frequency transformers 30 of an inverter circuit for commercial AC power and an inverter for the battery are provided for the same core. The DC output from a diode bridge 10 is charged in the battery 3 through a charger 12. A power failure of commercial AC input is detected by a power failure detecting circuit 6 connected to the charger 12, and the DC electric power from the battery 3 is converted into high-frequency electric power by the inverter circuit consisting of a capacitor 18, a diode 19, a switching element 20, and the primary coil 29 of the high-frequency transformer 30, so that DC electric power is supplied to the computer through the secondary circuit of the high-frequency transformer 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer case equipped with a computer, and more particularly to a computer case having an uninterruptible power supply function.

[0002]

2. Description of the Related Art In a conventional computer case, a switching power supply is mounted on a computer case, and the switching power supply supplies power required by a computer.

[0003]

In a computer using a conventional computer case, if a commercial AC input suddenly loses power, the switching power supply also stops operating, and the data of the computer cannot be protected. For this reason, in order to provide an uninterruptible function, an uninterruptible power supply must be provided externally on a commercial AC input line.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and comprises a computer, a switching power supply operated by a commercial AC input and a battery input, mounted in a computer case. At the same time, a slot is provided in an empty space of the computer case, a battery is mounted, and even when a commercial AC input is interrupted, required power is supplied to the computer for a certain period of time so that the data of the computer can be protected.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a perspective view of a computer case according to the present invention.
The switching power supply 2 and the battery 3 are mounted in the empty space. FIGS. 1 and 2 are block diagrams showing a circuit configuration of a switching power supply 2 mounted on a computer case 1 in the present invention.

In the switching power supply shown in FIG.
The primary winding of the high-frequency transformer in the inverter circuit of the commercial AC power supply and the inverter circuit of the battery is provided on the same core, and the output voltage from the inverter circuit of the commercial AC power supply is higher than the output voltage from the inverter circuit of the battery. The number of turns of each primary winding in the high-frequency transformer is set so that the height is also high. In FIG. 1, a commercial AC input is converted into DC power in a diode bridge 10 and is turned on and off by a switching element 15 connected to a primary winding of a high-frequency transformer 30 to be converted into high-frequency power. The winding ratio of the secondary windings 27 and 28 of the high-frequency transformer 30 is determined so as to correspond to the voltage required by the computer 4, and is converted to DC power by a rectifier circuit including a diode, a reactor, and a capacitor on the secondary side. Is converted.

[0007] The DC output from the diode bridge 10 is input to a charger 12, and the battery 3 is floatingly charged through the charger 12 in normal times. The power failure of the commercial AC input is detected by the power failure detection circuit 6 connected to the charger 12, and the DC power from the battery 3 is supplied from the capacitor 18, the diode 19, the switching element 20, and the primary winding 29 of the high frequency transformer 30. The high-frequency power is converted into high-frequency power in the inverter circuit, and the DC power is supplied to the computer 4 via the secondary circuit of the high-frequency transformer 30. In addition, in addition to the above-mentioned power failure detection circuit 6, a battery low voltage detection circuit 7 and a shutdown switch 8 are provided to execute the low voltage protection of the battery 3 and the shutdown process of the computer 4 in an emergency.

In the switching power supply shown in FIG.
A booster circuit 21 for boosting the output voltage of the battery 3 is provided. The boosted output voltage is set to be slightly lower than the rectified voltage obtained by DC-converting the commercial AC input in the diode bridge 10. That is, the high-frequency transformer 3
The inverter circuit including the primary winding of 0 is used in normal times by commercial AC input and also when backing up from a battery during a power failure. The other circuit configuration is the same as that in FIG. 1, and the description is omitted.

[0009]

As described above, in the computer case according to the present invention, a switching power supply, a computer, and a battery which are operated by a commercial AC input and a battery input and supply required power to the computer are mounted in an appropriate arrangement. It is. Therefore, even when the commercial AC input is interrupted, the required power can be supplied from the battery to the computer for a certain period of time, and the data of the computer can be protected. Therefore, there is no need to provide an external uninterruptible power supply, and a compact and inexpensive uninterruptible power supply can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of a switching power supply mounted on a computer case.

FIG. 2 is a block diagram showing a circuit configuration of a switching power supply mounted on a computer case.

FIG. 3 is a perspective view of a computer case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Computer case 2 Switching power supply 3 Battery 4 Computer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takahiko Kaneko 1-19-9, Tsutsumori, Sumida-ku, Tokyo Inside Nippon Electric Seiki Co., Ltd. (72) Koichi Soeda 1-19-1, Tsutsumori, Sumida-ku, Tokyo No. within Nippon Electric Seiki Co., Ltd.

Claims (2)

[Claims] 1. A computer case comprising a computer, a switching power supply which operates by a commercial AC input and a battery input, and supplies a required power to the computer, and a battery mounted in a slot provided in an empty space. In normal times, the computer is operated by the commercial AC input via the switching power supply, and when the commercial AC input is interrupted, a required power can be supplied to the computer from the battery via the switching power supply for a certain time. A computer case with an uninterruptible power supply function. 2. A switching power supply is provided with a switch capable of executing a power failure detection circuit of a commercial AC input, a low voltage detection circuit of a battery, a charging circuit of a battery, and a computer shutdown process. Item 2. A computer case with an uninterruptible power supply according to item 1.