A slip ring system for an electrical machine includes slip rings, which are arranged such that they can rotate about a rotation axis, for transmitting current to the electrical machine; contact brushes which are in contact with the slip rings; and an impeller which can be fitted so as to surround the rotation axis and in a rotationally fixed manner in relation to the slip rings and is adjusted to generate an air flow in a plane perpendicular to the shaft. The impeller has two disc-shaped side walls which surround the shaft and between which a plurality of vanes extend. A filter surrounds the impeller so that an imaginary radial extension of the impeller meets the filter.

An air filtering system for an electrical enclosure including at least one filtering element arranged to filter an air flow injected into the inlet of the enclosure by a fan device, the system also including several independent filtering cells Ci, with i ranging from 1 to n and n greater than or equal to 3, each filtering cell Ci having a variable filtering capacity, each filtering cell Ci, with i greater than or equal to 2, is rendered active to filter a part of the air flow when the sum of the filtering capacities of the cells, ranging from C1 to Ci1, drops below a specific threshold.

A breather filter for reducing water in a data storage device housing includes an outer layer, an inner layer, and an intermediary layer positioned between the inner and outer layers. The outer layer includes an outer layer of hydrophilic material. The inner layer includes at least one of an inner layer of hydrophobic material and an inner layer of hydrophilic material. The intermediary layer includes a water adsorbing material, and fibers that promote water permeation from the inner layer to the outer layer.

A coolant gas, multi-filter filtering unit, for use with servers and other electrical equipment that can be utilized as a retrofit device for existing servers or provided as OEM equipment with the server is described. A series of static centrifugal force filtering units are position upstream of a replaceable surface filter. The surface filter can be a HEPA filter, or alternatively include an absorbent layer or separate third filter of charcoal to remove VOCs.

The disclosure provides a server device and a filter replacement reminder method thereof. The filter replacement reminder method is suitable for the server device including a filter and includes the following steps. A current operation temperature of a target component is obtained by using a component temperature sensor. A working state of a heat dissipation component is detected. An ambient temperature is obtained by using an ambient temperature sensor. A reminder to replace the filter is provided by using a human-machine interface according to the current operation temperature, the working state of the heat dissipation component, and the ambient temperature.

An electronic device includes a shell, a fan, a dust filter assembly, a wind speed sensor, and a controller. The shell includes an accommodation space. The fan is arranged in the accommodation space. The dust filter assembly is at least partially arranged at an air opening of the shell and is configured to filter dust. The wind speed sensor is arranged on a side of the air opening of the fan and is configured to detect a first flow rate of air on the side of the air opening of the fan. The controller is electrically connected to the wind speed sensor and is configured to determine whether the dust filter assembly needs to be cleaned based on the first flow rate and a determined flow rate.

A breather filter for reducing water in a data storage device housing includes an outer layer, an inner layer, and an intermediary layer positioned between the inner and outer layers. The outer layer includes an outer layer of hydrophilic material. The inner layer includes at least one of an inner layer of hydrophobic material and an inner layer of hydrophilic material. The intermediary layer includes a water adsorbing material, and fibers that promote water permeation from the inner layer to the outer layer.

The inventive concepts provide apparatuses for transferring a substrate and/or apparatuses for processing a substrate including the same. The substrate transferring apparatus including a chamber, a filter assembly disposed in a chamber to provide external air into the chamber, and an additional assembly including a moisture removing part and a purge gas providing part sequentially stacked on the filter assembly may be provided. The filter assembly may be coupled to the additional assembly.

An air purifying device for a front opening unified pod (FOUP) carrying silicon wafers includes an air supply assembly and an air discharging assembly. The air supply assembly can be triggered by a signal to supply purified air to the FOUP. The air discharging assembly discharges air from the FOUP when the air supply assembly begins to supply the FOUP with purified air and detects a humidity and a temperature of the discharged air. The detected humidity and the detected temperature correspond to a relative humidity of the discharged air. When the relative humidity is equal to a preset relative humidity, the air supply assembly is stopped and the air discharging assembly is stopped.

An enclosure (100) of an electric device includes an enclosure wall (105) and a flame arrestor filter (130) integrated into the enclosure wall (105), wherein the flame arrestor filter (130) is configured to filter a stream (160) of hot gases and particles occurring during an arc fault event inside the enclosure (100) such that the hot gases and particles are absorbed by the filter (130) and a filtered stream (170) of cooled gases exits the filter (130) to an outside of the enclosure (100).