The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

The hydrogen production apparatus includes: a rectifier supplied with first electrical power from outside, and that outputs direct-current second electrical power; an electrolyzer supplied with the second electrical power and that carries out electrolysis of an alkaline aqueous solution; a pure water tank that retains a pure water; a pure water pipe connected between the pure water tank and an electrolyzer, allowing the pure water to be distributed from the pure water tank to the electrolyzer; an inert gas cylinder that contains an inert gas; and a first valve connected between the inert gas cylinder and the pure water pipe, is the first valve being closed when the first electrical power is supplied, and being open when the first electrical power is not supplied. The inert gas is introduced into the pure water pipe by opening the first valve.

A three-phase alternating-current power supply compatible electrically driven hoisting machine having a three-phase alternating-current input terminal, a three-phase rectifier circuit, a direct-current circuit, an inverter, and a three-phase alternating-current motor is changed into a single-phase alternating-current power supply compatible electrically driven hoisting machine by attaching a single-phase AC-DC converter unit having a single-phase alternating-current input terminal, a single-phase AC-DC converter, and a direct-current circuit to the three-phase alternating-current power supply compatible electrically driven hoisting machine and connecting the P and N electrodes of a direct-current output terminal of the single-phase AC-DC converter unit to the P and N electrodes of the direct-current circuit, respectively, and further open-circuiting the three-phase alternating-current input terminal.

A three-phase alternating-current power supply compatible electrically driven hoisting machine having a three-phase alternating-current input terminal, a three-phase rectifier circuit, a direct-current circuit, an inverter, and a three-phase alternating-current motor is changed into a single-phase alternating-current power supply compatible electrically driven hoisting machine by attaching a single-phase AC-DC converter unit having a single-phase alternating-current input terminal, a single-phase AC-DC converter, and a direct-current circuit to the three-phase alternating-current power supply compatible electrically driven hoisting machine and connecting the P and N electrodes of a direct-current output terminal of the single-phase AC-DC converter unit to the P and N electrodes of the direct-current circuit, respectively, and further open-circuiting the three-phase alternating-current input terminal.

A basketball that uses compression or decompression of piezo elements to produce current that charges a rechargeable battery in the basketball. The current is generated by the piezo elements that are placed between an inner shell and an outer shell of the basketball so that the bouncing of the basketball creates current to charge the battery. The charged battery can be coupled to an electronic device (e.g., smartphone) to charge the electronic device.

A basketball that uses compression or decompression of piezo elements to produce current that charges a rechargeable battery in the basketball. The current is generated by the piezo elements that are placed between an inner shell and an outer shell of the basketball so that the bouncing of the basketball creates current to charge the battery. The charged battery can be coupled to an electronic device (e.g., smartphone) to charge the electronic device.

A three-phase alternating-current power supply compatible electrically driven hoisting machine having a three-phase alternating-current input terminal, a three-phase rectifier circuit, a direct-current circuit, an inverter, and a three-phase alternating-current motor is changed into a single-phase alternating-current power supply compatible electrically driven hoisting machine by attaching a single-phase AC-DC converter unit having a single-phase alternating-current input terminal, a single-phase AC-DC converter, and a direct-current circuit to the three-phase alternating-current power supply compatible electrically driven hoisting machine and connecting the P and N electrodes of a direct-current output terminal of the single-phase AC-DC converter unit to the P and N electrodes of the direct-current circuit, respectively, and further open-circuiting the three-phase alternating-current input terminal.

A three-phase alternating-current power supply compatible electrically driven hoisting machine having a three-phase alternating-current input terminal, a three-phase rectifier circuit, a direct-current circuit, an inverter, and a three-phase alternating-current motor is changed into a single-phase alternating-current power supply compatible electrically driven hoisting machine by attaching a single-phase AC-DC converter unit having a single-phase alternating-current input terminal, a single-phase AC-DC converter, and a direct-current circuit to the three-phase alternating-current power supply compatible electrically driven hoisting machine and connecting the P and N electrodes of a direct-current output terminal of the single-phase AC-DC converter unit to the P and N electrodes of the direct-current circuit, respectively, and further open-circuiting the three-phase alternating-current input terminal.

The present invention discloses an uninterrupted power bank, mainly comprising: a first switch, a rectifier, a first power converter, a second switch, a battery unit, a second power converter, a third power converter, a third switch, a fourth switch, and output ports. During a normal supply of a mains supply, an AC power provided by the mains supply is transmitted from the uninterrupted power bank to a back-end power supply device. In the meantime, the AC power is simultaneously converted to a DC power and then stored in the battery unit. When the mains supply is suddenly interrupted, the DC power stored in the battery unit is released and subsequently converted to a 390 VDC power for being supplied to the power supply device. Therefore, this uninterrupted power bank is able to largely reduce the power loss because of supplying DC power to back-end power supply device.

The present invention discloses an uninterrupted power bank, mainly comprising: a first switch, a rectifier, a first power converter, a second switch, a battery unit, a second power converter, a third power converter, a third switch, a fourth switch, and output ports. During a normal supply of a mains supply, an AC power provided by the mains supply is transmitted from the uninterrupted power bank to a back-end power supply device. In the meantime, the AC power is simultaneously converted to a DC power and then stored in the battery unit. When the mains supply is suddenly interrupted, the DC power stored in the battery unit is released and subsequently converted to a 390 VDC power for being supplied to the power supply device. Therefore, this uninterrupted power bank is able to largely reduce the power loss because of supplying DC power to back-end power supply device.