초록 ▼

A cooking unit having a hood equipped with air cleaning structures and blowers for moving air through the cleaning structures. The air cleaning structures include a pre-filter having spaced baffles for collecting air borne greases and particles. A primary fiber filter and secondary charcoal and oxid

A cooking unit having a hood equipped with air cleaning structures and blowers for moving air through the cleaning structures. The air cleaning structures include a pre-filter having spaced baffles for collecting air borne greases and particles. A primary fiber filter and secondary charcoal and oxidizer beds are located downstream of the pre-filter. A high efficiency filter is located downstream of the secondary cleaning beds. A damper behind the pre-filter closes in response to an increase in temperature of the air moving through the filters. A separate heating unit is used to reactivate the charcoal.

대표청구항 ▼

An air cleaning apparatus comprising: a housing having a passage, an air inlet and air outlet in communication with the passage, means located in said passage for moving air through the passage, said air moving through the inlet and being discharged through the outlet, air pre-filter means located i

An air cleaning apparatus comprising: a housing having a passage, an air inlet and air outlet in communication with the passage, means located in said passage for moving air through the passage, said air moving through the inlet and being discharged through the outlet, air pre-filter means located in the passage adjacent in inlet for removing particulates from the air moving through the pre-filter means, primary filter means located in the passage downstream from the pre-filter means for removing additional particulates from the air moving through said primary filter means, secondary filter means including charcoal bed filter means located in the passage downstream from the primary filter means for removing additional particulates from the air moving through the charcoal bed filter means, and, an oxidizer medium located in the passage downstream from the charcoal bed filter means to remove odors from the air moving therethrough, high efficiency filter means located in the passage downstream from the secondary filter means for removing small particulates from the air moving through said high efficiency filter means, damper means for closing said passage, said damper means being located between the pre-filter means and the secondary filter means, and, control means for holding the damper means open to permit air flow through the passage, said control means including temperature responsive elements for closing the damper means to prevent the flow of air through the passage.