Patent ID: 6932691

Claim:
A film valve assembly for a heating, ventilation and air conditioning system comprising: a frame including a pair of left and right sidewalls, a base wall interconnecting and disposed between said left and right sidewalls, and a pair of first and second supporting seats projecting from said base wall and adjacent respectively to said left and right sidewalls, each of said first and second supporting seats being formed with a retaining hole; two roller mechanisms disposed respectively at two opposite sides of said base wall; a film valve disposed between and connected to said roller mechanisms and including a valve portion that is formed with at least one vent hole therethrough; and a tension unit including a first tension rod disposed between said first and second supporting seats of said frame, and a pair of first and second retaining units connected respectively to two ends of said first tension rod and to said first and second supporting seats of said frame, said first retaining unit including a spring-biased retaining element that is attached to said first tension rod and that is biased to move away from said first tension rod and into said retaining hole in said first supporting seat of said frame, said second retaining unit interconnecting said first tension rod and said second supporting seat of said frame so as to confine said valve portion of said film valve between said first tension rod and said base wall of said frame.