Abstract: An industrial liquid circulating and cooling machine for hydraulic fluids, lubricants, cutting oil, chemicals and the like has a chassis, an electro-mechanical refrigeration system with a compressor and condenser and evaporator, a I/O communication bulkhead for liquid and electrical flow, a single air filter, removable side panels held on by novel structure and locked by manual latches, a cover panel hinged and locked to the side panel by manual latches, and a heat exchanger having a novel non-pressurized liquid tank with a baffled tube and fin evaporator immersed in the liquid in the tank.

Abstract: An industrial electronics air conditioner has a cabinet with top, bottom, side and end panels, an electromechanical refrigeration system within the cabinet, an easily removable elongate condenser blower and motor module which comes out and goes in transversely when a side panel is removed, an easily removable evaporator blower and motor module having a centrifugal blower wheel and manual latches for retention to and removal from an end panel, a unique improved structure of intersecting interior barriers defining air outlet plenums and crossing hot ambient and cooled load outlets, and unique corrugated plastic exhaust ducting for exhausting hot ambient air to the outside of an electronics enclosure. A method of installing the air conditioner within the enclosure is also provided.

Abstract: An air conditioner having improved internal structure and intended specifically for cooling electronic enclosures has a cabinet containing a compresser, evaporator and condenser coils, a load air blower, an ambient air blower, and a single motor connected to both blowers. The interior of the cabinet is divided by upper and lower horizontal dividers into upper, central and lower compartments. The upper compartment is divided into a separate ambient air intake compartment and a separate load air intake compartment with both blowers and the motor being in the load intake compartment. The evaporator coil and the ambient intake compartment and associated structure are asymetrical as is the compresser installation. The load air inlet and outlet are on the back, the ambient inlet is on a side and the ambient outlet is on the bottom. This new air conditioner is of exceptionally small physical size for its cooling capacity and is relatively quiet and easy to manufacture.

Abstract: A heat exchanger for cooling enclosures, typically electronic enclosures, has a box with a heat pipe type exchange element and upper and lower fan units. A novel element holder and box structure and arrangement of components provides for safety, NEMA-12 sealing, easy access and cleaning without tools, and enables the exchanger to be inverted end-for-end and mounted either on the inside or outside of the exchanger while providing a cover that easily comes off for service. The exchanger has an ambient fan and motor and a heat load fan and motor normally inside the box, and both fan and motors and the exchanger are movable to alternative positions for service. A method of servicing a heat exchanger is provided wherein two fans and motors, and a heat exchanger sequentially are unlocked and moved to alternative service positions.