Evaporative coolers

Claim 3

The method according to claim 1 wherein the primary air flow is discharged into a zone of the space which is occupied or to be occupied, whereby to effect cooling of the zone.

Claim 4

The method according to claim 1, wherein the secondary flow is separated from the cooled primary air flow before the primary air flow is discharged into the space.

Claim 5

The method according to claim 3, wherein the primary air flow is discharged into a zone of the space which is occupied or to be occupied, whereby to effect cooling of the zone.

Claim 6

The method according to claim 3, wherein the secondary air flow is separated such that it enters the second set of passageways at the lowest possible wet bulb temperature.

Claim 7

AN EVAPORATIVE COOLING INSTALLATION COMPRISING: A DEFINED SPACE TO BE COOLED, A HEAT EXCHANGER CONSTRUCTED AND ARRANGED TO DEFINE A FIRST SET OF PASSAGEWAYS AND A SECOND SET OF PASSAGEWAYS IN HEAT EXCHANGE RELATION WITH EACH OTHER, MEANS TO DRAW A PRIMARY AIR FLOW THROUGH THE FIRST SET OF PASSAGEWAYS AND TO DISCHARGE THE SAME INTO THE SPACE, MEANS TO CAUSE A SECONDARY AIR FLOW TO SEPARATE FROM THE PRIMARY AIR FLOW AFTER IT HAS PASSED THROUGH THE FIRST SET OF PASSAGEWAYS AND TO CAUSE THE SECONDARY AIR FLOW TO PASS THROUGH THE SECOND SET OF PASSAGEWAYS AND TO DISCHARGE INTO THE SPACE IN S STREAM WHICH IS SEPARATED FROM THAT PORTION OF THE PRIMARY AIR FLOW WHICH IS DISCHARGED DIRECTLY INTO THE SPACE, MEANS TO DIRECT SAID SECONDARY AIR FLOW ONTO OR ALONG A SURFACE THEREIN WHICH REDIATES HEAT INTO THE SPACE WHEREBY TO EFFECT COOLING OF THE SRFACE AND, MEANS TO SUPPLY A LIQUID TO THE SECONDARY AIR FLOW WITHIN THE SECOND SET OF PASSAGEWAYS, WHEREBY THE LIQUID IS EVAPORATED WITHIN THE SECOND SET OF PASSAGEWAYS TO FFECT COOLING OF THE SECONDARY AIR FLOW AND TO EFFECT COOLING OF THE PRIMARY AIR FLOW BY HEAT EXCHANGE BETWEEN THE RESPECTIVE SETS OF PASSAGEWAYS.

Claim 8

AN EVAPORATIVE COOLING INSTALLATION COMPRISING: A DEFINED SPACE TO BE COOLED, A HEAT EXCHANGER CONSTRUCTED AND ARRANGED TO DEFINE A FIRST SET OF PASSAGEWAYS AND A SECOND SET OF PASSAGEWAYS IN HEAT EXCHANGE RELATION WITH EACH OTHER, MEANS TO DRAW A PRIMARY AIR FLOW THROUGH THE FIRST SET OF PASSAGEWAYS AND TO DISCHARGE THE SAME INTO THE SPACE, MEANS TO CAUSE A SECONDARY AIR FLOW TO SEPARATE FROM THE PRIMARY AIR FLOW AFTER IT HAS PASSED THROUGH THE FIRST SET OF PASSAGEWAYS AND TO CAUSE THE SECONDARY AIR FLOW TO PASS THROUGH THE SECOND SET OF PASSAGEWAYS AND TO DISCHARGE INTO THE SPACE IN S STREAM WHICH IS SEPARATED FROM THAT PORTION OF THE PRIMARY AIR FLOW WHICH IS DISCHARGED DIRECTLY INTO THE SPACE, MEANS TO DIRECT SAID SECONDARY AIR FLOW ONTO OR ALONG A SURFACE THEREIN WHICH REDIATES HEAT INTO THE SPACE WHEREBY TO EFFECT COOLING OF THE SRFACE AND, MEANS TO SUPPLY A LIQUID TO THE SECONDARY AIR FLOW WITHIN THE SECOND SET OF PASSAGEWAYS, WHEREBY THE LIQUID IS EVAPORATED WITHIN THE SECOND SET OF PASSAGEWAYS TO FFECT COOLING OF THE SECONDARY AIR FLOW AND TO EFFECT COOLING OF THE PRIMARY AIR FLOW BY HEAT EXCHANGE BETWEEN THE RESPECTIVE SETS OF PASSAGEWAYS.

Claim 9

The installation according to claim 6 and further comprising means to direct said primary air flow into a zone of the space which is occupied or to be occupied, whereby to effect cooling of the zone.

Claim 10

The installation according to claim 6, wherein the heat exchanger is a plate type heat exchanger having spaced apart plates arranged to define the said sets of passageways.

Claim 11

The installation according to claim 6, wherein the means to cause the secondary air flow to separate from the primary air flow is such that the secondary air flow separates from the primary air flow before the primary air flow is discharged to the space.

Claim 12

The installation according to claim 9, wherein the primary air flow is discharged into a zone of the space which is occupied or to be occupied, whereby to effect cooling of the zone.

Claim 13

The installation according to claim 9, wherein the means to cause the secondary air flow to separate from the primary air flow is such that the secondary flow enters the secondary set of passageways at the lowest possible wet bulb temperature.

Claim 14

A vehicle comprising: a passenger cabin; a heat exchanger arranged to define a first set of passageways and a second set of passageways in heat exchange relation with each other; means to draw a primary air flow from the exterior of the vehicle through the first set of passaGeways and to discharge the same into a zone of the cabin which is occupied or to be occupied; means to cause a secondary air flow to separate from the primary air flow after it has passed through the first set of passageways but before it has been discharged into the cabin, and to cause the secondary air flow to pass through the second set of passageway and to discharge into the cabin in a stream which is separate from that portion of the primary air flow which is discharged directly into the space and which stream is directed onto or along the interior surface of the vehicle windscreen and/or cabin roof; and means to supply a liquid to the secondary air flow within the second set of passageways; whereby the liquid is evaporated within the second set of passageways to effect cooling of the secondary air flow and to effect cooling of the primary air flow by heat exchange between the respective set of passageways.

Claim 15

A vehicle comprising: a passenger cabin; a heat exchanger arranged to define a first set of passageways and a second set of passageways in heat exchange relation with each other; means to draw a primary air flow from the exterior of the vehicle through the first set of passaGeways and to discharge the same into a zone of the cabin which is occupied or to be occupied; means to cause a secondary air flow to separate from the primary air flow after it has passed through the first set of passageways but before it has been discharged into the cabin, and to cause the secondary air flow to pass through the second set of passageway and to discharge into the cabin in a stream which is separate from that portion of the primary air flow which is discharged directly into the space and which stream is directed onto or along the interior surface of the vehicle windscreen and/or cabin roof; and means to supply a liquid to the secondary air flow within the second set of passageways; whereby the liquid is evaporated within the second set of passageways to effect cooling of the secondary air flow and to effect cooling of the primary air flow by heat exchange between the respective set of passageways.