Patent ID: 8080078

Claim:
An anti-snow module for installation in a housing of an air filter, the anti-snow module comprising: a support plate configured and adapted to support said module in said housing of said air filter; a partition configured for mounting into an interior of said housing of said air filter; a valve plate having at least one guide sleeve, said valve plate configured to seal a secondary air inlet of said housing when a differential pressure between said housing interior at a downstream side of said valve plate and an exterior of said housing is below a predetermined value, said valve plate configured to open said secondary air inlet of said housing when said differential pressure exceeds said predetermined value; and at least one guide rail slideably and supportively engaged with said at least one guide sleeve to slideably support said valve plate, wherein said anti-snow module is arranged in said housing at an intake air side of said air filter, wherein said partition divides said intake side into two separated areas- a first and a second area, wherein when said differential pressure is less than said predetermined value, said sealing of said valve plate closes said secondary air inlet preventing secondary air flow from reaching said second area, and wherein when said differential pressure exceeds said predetermined value, said valve plate is urged by said differential pressure to slide via said slideable and supportive engagement of said guide rails in said guide sleeves to open said secondary air inlet allowing air flow to reach said second area of said intake side of said filter.