Abstract: A railcar air conditioning duct according to one aspect which guides air fed from an air conditioner mounted on a railcar. The railcar includes: a duct wall forming an air flow passage which guides air in a car longitudinal direction; and a plurality of through holes lined up in the car longitudinal direction, the through holes being open at the duct wall as air outlet ports through which the air in the air flow passage is blown from the air flow passage toward a passenger room. A ratio of an opening area of one of the through holes to an area of one of a plurality of partial regions formed by dividing, in the car longitudinal direction, an inner surface of a lower wall portion such that in plan view, the regions contain the respective through holes falls within a range of 2.0% or more and 7.5% or less.

Abstract: A process for supervising an air conditioning system of a railway vehicle. The process comprising the following steps: a) after starting the air conditioning system, measuring physical properties relative to the refrigerant; b) from the physical properties measured during step a), calculating thermodynamic properties; c) from the thermodynamic properties calculated during step b), calculating the density, optionally averaged, of the refrigerant inside each component of the air conditioning system; d) using manufacturer data, which includes the dimensions of each component of the air conditioning system, calculating the passage volume of the refrigerant inside each component of the air conditioning system; e) using the values calculated in steps c) and d) to calculate the total mass of refrigerant contained inside the air conditioning system; and f) comparing the total mass of refrigerant calculated in step e) with the total mass of refrigerant originally contained inside the air conditioning system.

Abstract: The present invention relates generally to an external condenser and light assembly and, more particularly, to an improved external air conditioning condenser and housing that is designed to additionally serve as a light assembly for an emergency vehicle. The condenser housing is mounted to the exterior of the emergency vehicle, which improves the performance of the emergency vehicle's air-conditioning system. The design of the condenser housing also allows it to serve as a light assembly on which emergency vehicle lights are mounted. The condenser housing and light assembly structure thereby provides for proper air conditioning functionality without occupying space on the exterior of the vehicle that would more preferably be occupied by emergency lighting.

Abstract: A cover for an air conditioning system includes a fluid inlet port adapted to permit fluid located outside the interior space to enter through a wall of the cover and into a first interior space portion of the cover. The cover further includes a fluid outlet port adapted to permit fluid located inside the second interior space portion to exit through the wall to a location outside the interior space. The cover may be integrated as part of a vehicle wherein a fluid inlet port of the cover can be placed in fluid communication with an air inlet of a first evaporator fan and an air inlet of a second evaporator fan and a fluid outlet port of the cover can be placed in fluid communication with an air outlet of the second evaporator fan. Methods also include retrofitting a vehicle comprising the steps of removing a first cover from a support surface and mounting a second cover to the support surface.