A fitness equipment and an automatic oxygen-generating fitness equipment are disclosed. The fitness equipment comprises a power unit, a sensor unit and an oxygen-generating assembly. The power unit comprises a belt drive turnplate, a belt and a magnetic wheel. Rotation of the belt drive turnplate drives the belt to operate so that the magnetic wheel is driven to rotate. The sensor unit is adapted to detect the belt drive turnplate and generate an activation signal when the belt drive turnplate is rotating. The oxygen-generating assembly comprises a control unit, a motor and an oxygen generator. The control unit is configured to receive the activation signal from the sensor so that the motor is activated to drive the oxygen generator to operate. The control unit may also control the equipment to switch between an oxygen-generating mode and a non-oxygen-generating mode.

An audio speaker having a speaker housing surrounding a back volume that is divided into a rear cavity behind a speaker driver and an adsorption cavity separated from the rear cavity by a permeable partition, is disclosed. More particularly, the adsorption cavity may be defined between the speaker housing and the permeable partition, and may be directly filled with adsorptive particles to adsorb gas during sound generation. The permeable partition may allow the gas to flow between the rear cavity and the adsorption cavity, and may retain the adsorptive particles within the adsorption cavity. Other embodiments are also described and claimed.

A gas treatment system includes: a main exhaust line for guiding exhaust gas to a detoxification apparatus; a bypass line for guiding the exhaust gas to an emergency detoxification apparatus; an upstream exhaust line; and a three-way valve capable of switching a flow of the exhaust gas from the upstream exhaust line to the main exhaust line or the bypass line, in which the bypass line includes: a gate valve; a gas introduction pipe through which a second gas is introduced; and a pressure gauge configured to detect pressure. When the three-way valve discharges gas to the main exhaust line, in a state where the second gas has been introduced into a closed flow path C between the gate valve and the three-way valve from the gas introduction pipe, internal leakage in the three-way valve is detectable using change in the pressure detected by the pressure gauge.

Provided are a hydrogen recycle system and a hydrogen recycle method, whereby hydrogen can be purified to high purity at high yield from a gas, said gas being exhausted from a nitride compound production device, and recycled. The hydrogen recycle system comprises an exhaust gas supply path supplying a gas exhausted from a nitride compound production device, a hydrogen recycle means and a hydrogen supply path. The hydrogen recycle means of the hydrogen recycle system is characterized by comprising: a plasma reaction vessel that defines at least a part of a discharge space; a hydrogen separation membrane that divides the discharge space from a hydrogen flow path communicated with the hydrogen supply path, defines at least a part of the discharge space by one surface thereof and also defines at least a part of the hydrogen flow path by the other surface thereof; an electrode that is disposed outside the discharge space; and an adsorbent that is filled in the discharge space and adsorbs the supplied exhaust gas.

Provided are a hydrogen recycle system and a hydrogen recycle method, whereby hydrogen can be purified to high purity at high yield from a gas, said gas being exhausted from a nitride compound production device, and recycled. The hydrogen recycle system 1 comprises an exhaust gas supply path 11 supplying a gas exhausted from a nitride compound production device 2, a hydrogen recycle means 10 and a hydrogen supply path 12. The hydrogen recycle means 10 of the hydrogen recycle system 1 is characterized by comprising: a plasma reaction vessel 31 that defines at least a part of a discharge space 32; a hydrogen separation membrane 34 that divides the discharge space 32 from a hydrogen flow path 33 communicated with the hydrogen supply path 12, defines at least a part of the discharge space 32 by one surface thereof and also defines at least a part of the hydrogen flow path 33 by the other surface thereof; an electrode 35 that is disposed outside the discharge space 32; and an adsorbent 36 that is filled in the discharge space 32 and adsorbs the supplied exhaust gas.

An air purifying bed tent is disclosed, having a tent made from a semipermeable material suspended over a raised platform, thereby creating an enclosure for a user to be inside. An air purifying device is connected to the top of the tent, letting purified air into the enclosure and creating a local clean air zone for users. The positive pressure difference building up in the enclosure from the constantly added clean air forces clean air out through a plurality of openings, primarily through creases in the semipermeable material around the raised platform. Should the skirting be completely sealed, the semipermeable material will let out the pure air to a higher degree, ensuring a stable and easy touse operation.

Compositions for removing air pollutants from the air are provided. These compositions can be sprayed on a variety of surfaces to remove air pollutants such as volatile organic compounds (VOCs) from the environment, and are suitable for use in human dwellings.

A method and apparatus for the oxy-combustion of fuel in an internal combustion engine (ICE) used to power a vehicle includes one or more air separation devices that separate oxygen from the atmospheric air to mix with the fuel and return the nitrogen to the atmosphere and converts the free energy available in the form of waste heat from the engine exhaust gas stream and coolant system on board the vehicle into electrical and/or mechanical energy, which energy is used to separate oxygen from air to eliminate or significantly reduce the volume of nitrogen entering the ICE's combustion chamber, and thereby reduce NO.sub.x pollutants released into the atmosphere and increase the concentration of CO.sub.2 in the engine exhaust stream for capture using an integrated system to compress and increase the density of the captured CO.sub.2 for temporary on-board storage until it is discharged at a recovery station, e.g., during vehicle refueling.

A method of purifying a target fluid containing one or more impurities, the method includes providing the target fluid to a vessel having an adsorbent material located therein, where the absorbent material is a metal organic framework (MOF) or a porous organic polymer (POP), preferentially adsorbing either the target fluid or at least one of the one or more impurities on the adsorbent material, and venting the target fluid from the vessel if the impurities are preferentially adsorbed on the adsorbent material or venting the one or more impurities from the vessel if the target fluid is preferentially adsorbed on the adsorbent material.

This invention discloses a decontaminating column for on-line replacing adsorption material, and it includes: a tank having an inner tank being used for filling the adsorption material, and one end of the tank being set to be opened; at least one discharging part is being attached to the tank, and an open-close unit by which the adsorption material can be discharged and which is installed between the discharging part and the tank. There is a chamber in the discharging part, which is connected to a gas replacement unit. At the same time, this invention also discloses a glove box. Compared with the existing technology, this invention effectively solves the problems of low efficiency, high manufacturing cost and high maintenance cost generated by decontaminating column replacement mode in the existing technology; In addition, when the decontaminating column is used in the glove box, replacing the adsorption material can ensure that the water oxygen in the glove box is prevented from leaking out and/or the water oxygen outside of the glove box is prevented from penetrating into the box.