Two-passage pipe, especially for air conditioning installations

Claim 2

Conveying means, especially for conveying air in air conditioning installations, which comprises in combination: a pipe, and a flexible air impermeable diaphragm fastened to said pipe along diametrically oppositely located sections of said pipe, said sections extending over the length of said pipe and being located substantially along a central longitudinal plane of said pipe thereby dividing said pipe into two adjoining passages arranged alongside each other, said diaphragm being in a position to vary flow quantity through said adjoining passages alternately between essentially 0% and 100% of the collective flow quantity possible through the two passages in said pipe.

Claim 3

Conveying means in combination according to claim 1, in which said diaphragm includes sound absorbing material.

Claim 4

In combination in an air conditioning installation: an air conditioning device having an air inlet and an air outlet, a plurality of rooms to be air conditioned having inlet means for admitting conditioned air and also having outlet means for discharging air to be re-conditioned, first conduit means establishing communication between said outlet means of said rooms and said inlet of said air conditioning device, second conduit means connected to said outlet of said air conditioning device and branching out into a first branch and a second branch, post-heater means having an air inlet communicating with said first branch and also having an outlet, cooler means having an inlet communicating with said second branch and also having an outlet, conveying means comprising a pipe and a flexible air impermeable diaphragm fastened to said pipe along diametrically oppositely located sections of said pipe, said sections extending over the length of said pipe and being located substantially along a central longitudinal plane of said pipe thereby dividing said pipe into two adjoining passages arranged alongside each other, said diagphragm being in a position to vary flow quantity through said adjoining passages alternately between essentially 0% and 100% of the collective flow quantity possible through the two passages in said pipe, said two passages respectively communicating with said outlet of said post-heater means and said cooler means for respectively conveying cooled and heated air to said inlet means of said rooms, and mixing means interposed between said conveying means and said rooms for respectively admixing cold and warm air to the air respectively passing through said two passages to said air in said passages prior reaching said rooms.

Claim 5

In combination in an air conditioning installation: an air conditioning device having an air inlet and an air outlet, a plurality of rooms to be air conditioned having inlet means for admitting conditioned air and also having outlet means for discharging air to be re-conditioned, first conduit means establishing communication between said outlet means of said rooms and said inlet of said air conditioning device, second conduit means connected to said outlet of said air conditioning device and branching out into a first branch and a second branch, post-heater means having an air inlet communicating with said first branch and also having an outlet, cooler means having an inlet communicating with said second branch and also having an outlet, conveying means comprising a pipe and a flexible air impermeable diaphragm fastened to said pipe along diametrically oppositely located sections of said pipe, said sections extending over the length of said pipe and being located substantially along a central longitudinal plane of said pipe thereby dividing said pipe into two adjoining passages arranged alongside each other, said diagphragm being in a position to vary flow quantity through said adjoining passages alternately between essentially 0% and 100% of the collective flow quantity possible through the two passages in said pipe, said two passages respectively communicating with said outlet of said post-heater means and said cooler means for respectively conveying cooled and heated air to said inlet means of said rooms, and mixing means interposed between said conveying means and said rooms for respectively admixing cold and warm air to the air respectively passing through said two passages to said air in said passages prior reaching said rooms.