A filter system with self-cleaning function and a clothes dryer using the filter system, wherein the filter system comprises a shell 5 with an air inlet 12 and an air outlet 13, a filter system screen 7, a cleaning unit 3, a driving device and a lint collection drawer 8, wherein the driving device includes a drive motor 1 disposed on the outer wall of the shell 5 and a screw rod 2 disposed inside the shell 5, the output shaft of the drive motor 1 passes through the small hole I 14 opened on the shell 5 and extends inside the shell; one end of the screw rod 2 is engaged with the output shaft of the drive motor 1 and the other end of the screw rod 2 is mounted inside the small hole II 15 opened on the wall of the shell 5 opposite to the output shaft of the drive motor. The cleaning unit 3 is screwed on the screw rod 2 and driven by the screw rod 2 to move back and forth and the lower end of the cleaning unit 3 is in contact with the filter system screen 7, and the automatic self-cleaning lint function could be achieved. For the clothes dryer, the overall structure becomes more compact and reliable by improving structure of the filter system, and the lint collection efficiency and also drying efficiency are increased.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

The invention relates to a filter system comprising a housing and a filter element being accommodated in the housing, wherein a safety assembly is arranged inside the housing, having a blocking mode and an unblocking mode depending on an axial and/or rotational position of the filter element in the housing and being configured to provide access of a sealing structure of the filter element to a sealing area of a housing cover in the unblocking mode and to block access of the sealing structure to the sealing area in the blocking mode when the sealing structure of the filter element is moved towards the sealing area. The invention further relates to a safety assembly for a filter system and a filter element.

The invention relates to a filter system comprising a housing and a filter element being accommodated in the housing, wherein a safety assembly is arranged inside the housing, having a blocking mode and an unblocking mode depending on an axial and/or rotational position of the filter element in the housing and being configured to provide access of a sealing structure of the filter element to a sealing area of the safety assembly in the unblocking mode and to block access of the sealing structure to the sealing area in the blocking mode when the sealing structure of the filter element is moved towards the sealing area. The invention further relates to a safety assembly for a filter system, and a filter element.

The invention concerns a method to check a roasting system (10), said system comprising: at least one roasting apparatus (2), at least one smoke treating unit (3), said smoke treating unit comprising at least one removable filtering device (221, 222, 223), a smoke driver (23) configured to drive smoke from the roasting apparatus (2) to said at least one filtering device, wherein the at least one smoke treating unit (3) comprises at least one downstream pressure sensor (24), wherein the method comprises the steps of: operating at least the smoke driver (23) to drive gas through the smoke filtering unit, measuring the pressure P at the pressure sensor downstream the removable filtering device, calculating the drop of pressure P=PPref compared to a pressure of reference P.sub.ref, comparing said drop of pressure P to a predetermined threshold P.sub.0 corresponding to the presence of said at least one removable filtering device upstream the pressure sensor, if said drop of pressure P is inferior to said predetermined threshold P.sub.0, then displaying an alarm.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

According to the present disclosure, air cleaner assemblies, housings, serviceable filter cartridges and features, components, and methods, relating thereto are disclosed. In general, the features relate to systems that are configured to aid in inhibiting an improper cartridge from being installed in an air cleaner housing, during servicing. A variety of features are characterized, and in many examples, the cartridge includes a seal arrangement having radially directed seal surface with at least a first non-wavy or non-projection/recess section and a second wavy or projection/recess section. Examples are shown and described in detail.

The invention relates to a filter system comprising a housing and a filter element being accommodated in the housing, wherein a safety assembly is arranged inside the housing, having a blocking mode and an unblocking mode depending on an axial and/or rotational position of the filter element in the housing and being configured to provide access of a sealing structure of the filter element to a sealing area of the safety assembly in the unblocking mode and to block access of the sealing structure to the sealing area in the blocking mode when the sealing structure of the filter element is moved towards the sealing area. The invention further relates to a safety assembly for a filter system and a filter element.