Abstract: A portable oxygen concentrator includes at least one separation mechanism and an oxygen storage tank, where the separation mechanism is connected to the oxygen storage tank and includes an air bag and a molecular sieve tank that is filled with a molecular sieve for adsorption. The air bag has an air inlet and an air outlet. The air bag is connected to the molecular sieve tank through a valve group, which includes a first single valve and a second single valve. The air bag is connected to the molecular sieve tank through the first single valve. Each of the two ends of the molecular sieve tank has at least one gas outlet. When an inner space of the air bag is compressed and expanded once, the molecular sieve in the molecular sieve tank adsorbs and desorbs once.

Abstract: A portable oxygen concentrator includes at least one separation mechanism and an oxygen storage tank, where the separation mechanism is connected to the oxygen storage tank and includes an air bag and a molecular sieve tank that is filled with a molecular sieve for adsorption. The air bag has an air inlet and an air outlet. The air bag is connected to the molecular sieve tank through a valve group, which includes a first single valve and a second single valve. The air bag is connected to the molecular sieve tank through the first single valve. Each of the two ends of the molecular sieve tank has at least one gas outlet. When an inner space of the air bag is compressed and expanded once, the molecular sieve in the molecular sieve tank adsorbs and desorbs once.

Abstract: A membrane separation apparatus includes: a shell, wherein an inner surface of the shell is an arc surface, and at least one medium inlet and at least one medium outlet used for discharging a medium that is separated are arranged on the shell; a rotor arranged inside the shell, wherein at least two contact ends that are always in slidably contact with the inner surface of the shell are arranged on an outer surface of the rotor, the outer surface of the rotor and the inner surface of the shell form sealed separate cavities between the adjacent contact ends, and an empty part inside the rotor is used as a medium storage chamber; and separation chambers arranged inside the rotor.

Abstract: A pressure swing adsorption apparatus having: a housing with an arc-shaped inner surface, the housing being arranged with at least one gas inlet, at least one exhaust port and at least one gas outlet for discharging the separated gas; a rotor arranged in the housing, at least two contact ends being arranged on the rotor for maintaining a non-stop sliding contact with the inner surface of the housing, individual cavities, i.e., air cavities between the adjacent contact ends and formed between the external surface of the rotor and the inner surface of the housing, and each air cavity being separated by the contact ends; adsorption chambers set inside the rotor as parts of the rotor and rotated along with the rotor, molecular sieves being loaded in the interior of the adsorption chambers, and the adsorption chambers being provided with screen openings for connection with the air cavities.

Abstract: A portable power source and control device for a mobile phone or tablet is releasably attachable to a user's key ring or key chain and sized to be carried in a pocket or purse. The device has an internal rechargeable battery to provide emergency power for operating the user's phone, USB connectors for connection a power source and the phone, an internal microcontroller, and a Bluetooth® wireless communicator. A user actuator generated a locator command causes the phone to ring to indicate its location; and a locator command from the phone causes the device to emit a sound to indicate the device's location. The device can determine and indicate via LEDs the charge level of the battery, and has flash memory for data storage and transfer between devices.

Abstract: A membrane separation apparatus includes: a shell, wherein an inner surface of the shell is an arc surface, and at least one medium inlet and at least one medium outlet used for discharging a medium that is separated are arranged on the shell; a rotor arranged inside the shell, wherein at least two contact ends that are always in slidably contact with the inner surface of the shell are arranged on an outer surface of the rotor, the outer surface of the rotor and the inner surface of the shell form sealed separate cavities between the adjacent contact ends, and an empty part inside the rotor is used as a medium storage chamber; and separation chambers arranged inside the rotor.

Abstract: A pressure swing adsorption apparatus having: a housing with an arc-shaped inner surface, the housing being arranged with at least one gas inlet, at least one exhaust port and at least one gas outlet for discharging the separated gas; a rotor arranged in the housing, at least two contact ends being arranged on the rotor for maintaining a non-stop sliding contact with the inner surface of the housing, individual cavities, i.e., air cavities between the adjacent contact ends and formed between the external surface of the rotor and the inner surface of the housing, and each air cavity being separated by the contact ends; adsorption chambers set inside the rotor as parts of the rotor and rotated along with the rotor, molecular sieves being loaded in the interior of the adsorption chambers, and the adsorption chambers being provided with screen openings for connection with the air cavities.