IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0885001
(2004-07-07)
|
등록번호 |
US-7322205
(2008-01-29)
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발명자
/ 주소 |
- Bourne,Richard C.
- Lee,Brian Eric
- Berman,Mark J.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
22 인용 특허 :
9 |
초록
▼
A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building a
A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building and the evaporative modules and systems that refill and drain the water reservoir. The cooling unit also has a refrigerant section that includes a compressor, an expansion device, evaporator and condenser heat exchangers, and connecting refrigerant piping. Supply air components include a blower, an air filter, a cooling and/or heating coil to condition air for supply to the building, and optional dampers that, in designs that supply less than 100% outdoor air to the building, control the mixture of return and ventilation air.
대표청구항
▼
What is claimed is: 1. A packaged cooling device for conditioning air within a conditioned space, comprising: a housing enclosing the following elements: a refrigerant loop including a compressor, a condenser, and a direct-expansion evaporator; a first air mover that moves air through a conditioned
What is claimed is: 1. A packaged cooling device for conditioning air within a conditioned space, comprising: a housing enclosing the following elements: a refrigerant loop including a compressor, a condenser, and a direct-expansion evaporator; a first air mover that moves air through a conditioned space; an evaporative condenser cooling section having an air inlet to receive outside air and a plurality of barriers that define dry passages and wet passages; an indirect evaporative cooling section having a first air inlet to receive outside air, a second air inlet to receive building return air, and a plurality of barriers that define dry passages and wet passages; at least one water distribution system that provides water to the wet passages of the indirect evaporative cooling section and to the wet passages of the evaporative condenser cooling section; and a second air mover that moves air from the air inlet of the evaporative condensor cooling section through the evaporative condensor cooling section to the outdoors, and moves air from the second inlet of the indirect evaporative cooling section through the wet passages of the indirect evaporative cooling section to the outdoors, wherein the elements are arranged such that: the outside air entering the first air inlet of the indirect evaporative cooling section is indirectly evaporatively-cooled in the dry passages by conductive contact with the wet passages through the barriers to cool the outside air, and the outside air entering the air inlet of the evaporative condenser cooling section cools water passing through the wet passages of the evaporative condenser cooling section for circulation through the condenser. 2. The device of claim 1, wherein the barriers are parallel vertical plates. 3. The device of claim 1, including a hydronic heater disposed in the housing, the hydronic heater comprising a water heating device, a hydronie heating coil, a circulating pump, and connecting piping for circulating heated water through a heating coil disposed in a return air stream to heat building air recirculated through the device. 4. The device of claim 1 wherein the housing penetrates a roof of the conditioned space, and the indirect evaporative section, the evaporative condenser cooling section, the second air mover, the compressor, and the condenser extends above the roof, and the direct-expansion evaporator and the first air mover extend below the roof. 5. The device of claim 4, wherein the first air mover is positioned for removal and service from the roof without requiring removal of the indirect evaporative section, the evaporative condenser cooling section, the second air mover, or the compressor. 6. The device of claim 1, further comprising an inlet damper moveable between a first damper position that allows a flow of outside air to the first air blower that bypasses the indirect evaporative cooling section, a second damper position that allows a flow of outside air to the first air blower and prevents outside air from bypassing the indirect evaporative cooling section, and a third damper position that prevents flow of outside air to the first air blower. 7. The device of claim 1, further comprising a return damper movable between a first damper position that allows a flow of building return air to the second air mover and prevents a flow of building return air to the first air mover, a second damper position that allows a flow of building return air to the first air mover and a flow of building return air to the second air mover, and a third damper position that allow a flow of building return air to the first air mover and prevents a flow of building return air to the second air mover. 8. The device of claim 1, further comprising an exhaust damper moveable between a first damper position that allows a flow of building return air to the second air mover, and a second damper position that prevents a flow of building return air to the second air mover. 9. The device of claim 1, wherein the evaporative condenser cooling section comprises a parallel plate evaporative cooler comprising a plurality of vertical plates that define indirect passages and alternating direct passages wherein the direct passages are evaporatively cooled, and the outside air enters the indirect passages, flows downward through the indirect passages, emerges from the indirect passages, is drawn into the direct passages, flows upward through the direct passages, and is drawn out of the direct passages and discharged to the outside by the second air mover. 10. The device of claim 9, wherein the condenser is a refrigerant-to-water condenser and the water distribution system recirculates water from a reservoir beneath the evaporative condenser cooling section to the refrigerant-to-water condenser, to the direct passages of the evaporative condenser cooling section and to the wet passages of the indirect evaporative section, and all recirculated water drains to the reservoir under the condenser cooling section. 11. The device of claim 10, wherein the water distribution system directs a first recirculated water stream from the reservoir through the refrigerant-to-water condenser to the direct passages, and a second recirculated water stream from the reservoir to the wet passages. 12. The device of claim 11, wherein the water distribution system includes a valve to block the first recirculated water stream at times when no air is flowing through either the dry passages or the wet passages. 13. The device of claim 12, further comprising a thermal storage medium and a controller that operates a valve to direct the second water stream from the reservoir through the thermal storage medium before entering the refrigerant-to-water condenser. 14. The device of claim 13, wherein the controller directs water through the thermal storage medium and operates the second air mover during prescribed time periods when the refrigerant loop is not operating, and the water is cooler than the thermal storage medium. 15. The device of claim 14, wherein the thermal storage medium is an element of a building. 16. The device of claim 15, wherein the thermal storage element is concrete. 17. The device of claim 1, wherein water that condenses on the direct-expansion evaporator flows into the water distribution system. 18. The device of claim 1, wherein water that condenses on the direct-expansion evaporator is directed into the water distribution system.
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