An air treatment device having a flexible air hose, duct or gooseneck member. The air hose, duct or gooseneck member permits an inlet end thereof to be positioned in proximity to a patient so that a negative pressure can be created around the patient so that air can sucked or vacuumed into the system whereupon it is treated as the air flows through the system.

A filter housing can support filter media for a fan arrangement. The filter housing can include a filter body with a first opening at a first end and a second opening at a second end. A bell portion can be disposed between the air inlet opening and the air outlet opening and can define a cavity within the housing body. An air-permeable filter support can extend into the cavity to support the filter media within the cavity, with the filter media spaced apart from at least one of the first and second openings.

A gas circulation structure of an equipment front end module is provided, having a main structure including a chamber, a filter assembly, at least one connection pipeline, at least one wind collection device, at least one first fan, at least one second fan, at least one gas inlet port, at least one gas outlet port, and at least one gas discharge valve. By means of the above structure, gas is introduced through the gas inlet port into the connection pipeline and passes through the first fan to move, through the filter module, into the chamber to be caused by the second fan to return back to the connection pipeline to complete circulation. As such, the time required for filling gas is shortened; gas is caused to converge to thereby enhance the circulation efficiency; noise is reduced; dust is properly blown away; and subsequent service and maintenance is made easy.

An air filter (10) includes an openable filter housing (12) and a filter element (18). The filter housing (12) includes an inlet (26) and an outlet. A filter element (18) with a filter medium (46) is disposed replaceably in the filter housing separating the inlet (26) from the outlet (22). The filter element (18) features on an exterior side facing away from the element interior space (52) on an axial front face relative to the element axis (32) at least one supporting element (58) having at least one supporting lateral surface (60, 61) with at least one cylindrical portion and/or at least one portion with a variable cross-section in the direction of a main axis. The supporting element (58) is supported at least transversely in relation to the element axis (32) with the at least one supporting lateral surface (60, 61) against at least one corresponding support portion (42) on the side of the filter housing (12).

An air-cleaning fitness device has a main frame, a housing, a driving assembly, a fan device and at least one filter. The housing, the driving assembly and the fan device are mounted on the main frame. The housing has a confined space and an airflow passage. The driving assembly and the fan device are located inside the housing and connect to each other. The fan device has a second inlet and a second outlet. The second inlet and the second outlet are respectively aligned with two ends of the airflow passage. The at least one filter is mounted on the housing and is capable of covering either end of the airflow passage. The driving assembly has at least one driving member which extends out of the housing and drives the fan device. When the user operates the air-cleaning fitness device, the air-cleaning fitness device purifies the air at the same time.

The fuel tank cap with a charcoal canister includes a fuel tank inner cap and a fuel tank outer cap. A filling room with an upper opening is disposed in the center of the fuel tank inner cap. The fuel tank outer cap is disposed above the fuel tank inner cap. The fuel-absorption substrate is filled in the filling room, and a containing room is disposed at the bottom of the filling room. The fuel vapor can be absorbed by the filled charcoal completely, and the little liquid fuel entering from the fuel tank can be stored by the containing room and recycled back to the fuel tank when the gasoline engine stops. The filtering performance of charcoal powder can be enhanced since it is exempted from long-time fuel soaking.

According to the present disclosure, features, components and techniques useable for providing air cleaner arrangements are provided. Many of the features relate to an axial seal arrangement provided on a filter cartridge. A typical filter cartridge, for use with these features, is a filter cartridge having opposite flow ends. Example media arrangements that fit this characterization are described. Seal arrangements provided with an axial housing sealing engagement surface are shown. A seal arrangement is provided. Also, air cleaner assemblies having advantageous features therein are provided. Further, air cleaner housings are described, with selected, preferred features for engagement with filter cartridges.

Disclosed herein is an air cleaner, having at least one air inlet formed therein, includes a chassis having at least one air inlet passage inner peripheral surface formed therein, an air-sending device, a filter, and a front panel having at least one air inlet passage outer peripheral surface formed therein. An air inlet passage, providing communication between the air inlet and the filter, is formed between the air inlet passage inner peripheral surface and the air inlet passage outer peripheral surface. The air inlet passage inner peripheral surface and the air inlet passage outer peripheral surface have respective curvatures in a left-right direction, and the curvature of the air inlet passage inner peripheral surface is greater than that of the air inlet passage outer peripheral surface. The filter is composed of a central filter and side filters each having different catching targets, and the side filters are disposed on side surfaces of the central filter and closer to the respective air inlet passage inner peripheral surfaces than the central filter.

An air purifier is disclosed and includes a housing, a cover, a filter assembly, and a fan. The housing includes a casing and a shell which are detachable from each other, the casing has a venting portion. The cover has at least one breathable part. The filter assembly is configured in a space defined by the casing and the cover. The filter assembly includes a transformable body and at least one filter. The transformable body has two passage portions. The filter is located between the two passage portions. The transformable body is configured to be transformable to change airflow through the filter. The venting portion, the two passage portions, the breathable part are coupled in fluid communication. The fan is disposed in the housing and configured to generate airflow. The filter assembly is suitable for different situations of ventilating for fixed-locations and being worn for protection from smoke.

Hygiene regulations and social distancing are very effective in blocking short distance infections. During the lockdown, the distance rules can usually be adhered to, but what happens when the actual lockdown is over and the people meet again in a confined space? Then additional effective and efficient protection is essential to stabilize infection rates. Since the viruses are spread by contact and droplet infection, technical devices are required that effectively intervene in the chain of infection and effectively block infection. An effective protection is the respiratory mask as known since 100 years. An alternative to mask is an aerosol protection system for various applications in environment. The protection system consists of adjustable air sucking device and air blowing device in different form factors based on application. The aerosol protection system uses either an air curtain or air shield to prevent the aerosol going from one side of the curtain or shield to the other side.