Indirect and direct evaporative cooling system

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a shared sump positioned beneath said indirect and direct cooling stages;
• a drain valve connected to said sump;
• and
• a thermostatically activated controller connected to said drain valve.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• and
• a blower positioned upstream with respect to the indirect evaporative cooling stage and below at least one of the cooling stages, wherein the blower discharges air in a vertical direction.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• and
• means for separating the air discharged by the blower into first and second air flows, wherein one of the first and second air flows enters through the bottom of the indirect cooling stage.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• and
• a drip edge for keeping water from said indirect cooling stage out of the first flow.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage comprising a heat exchange plate arrangement and having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• and
• means for directing at least a portion of air discharged by the blower into the substantially horizontally extending flow path of the indirect evaporative cooling stage, wherein the directing means comprises a plurality of turning vanes formed integrally with the heat exchange plate arrangement.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• and
• a variable speed blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• and
• a sump and a pump shared by the direct and indirect cooling stages, wherein the sump has a drain value and has at least one sloping side and is configured to fully drain.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• and
• a supply duct including a channel for receiving a wall stud.

An indirect and direct evaporative cooler comprising:

• a direct evaporative cooling stage;
• an indirect evaporative cooling stage positioned upstream with respect to the direct evaporative cooling stage, the indirect evaporative cooling stage having a substantially horizontally extending primary flow passage and a substantially vertically extending secondary flow passage;
• a blower positioned upstream with respect to the indirect evaporative cooling stage, wherein the blower discharges air in a vertical direction;
• a shared sump positioned beneath said indirect and direct cooling stages;
• and
• a perforated baffle positioned proximate to said sump.