Abstract: A bypass system is incorporated into a roof curb to permit selective partial or complete deactivation of at least one section of a heat pipe of an air conditioning system thereby 1) to permit optimization of the sensible heat ratio of the air conditioning system for prevailing environmental conditions and, 2) to prevent moisture from condensing onto the evaporator or cooling section of the heat pipe and subsequently dripping into the return ducts of the air conditioning system. The bypass system is characterized by a bypass duct located adjacent one of the sections of the heat pipe and a bypass device which selectively channels at least some of the air which would otherwise flow through the controlled section of the heat pipe through the bypass duct instead. In its simplest form, the bypass device may comprise a single damper or the like positioned within the bypass duct.

Abstract: A heat pump cooling-heating-dehumidifying system for an electric vehicle includes a compressor for compressing refrigerant, a refrigerant throttling device for achieving pressure reduction of the refrigerant, an out-room air-heat exchanger for heat-exchanging between the refrigerant and outside air, a first in-room air-heat exchanger for heat-exchanging between the refrigerant and air to be introduced into a car room, a second in-room air-heat exchanger provided downstream of the first in-room air-heat exchanger for selectively heat-exchanging between the refrigerant and the air which was heat-exchanged at the first in-room air-heat exchanger, and a four-way switching valve for switching a flow passage of the refrigerant.

Abstract: An installation for the thermal drying of strips, sheets, etc., which are conveyed along a path over guide elements past dryer unit in a drying device. The installation has a cooling unit whose coolant is fed through suitable coolant lines to the guide elements in the drying zone and to the dryer units, from where the coolant is fed to a heat exchanger. The installation also has an air extractor to extract the air from the drying zone. In order to provide a space saving installation, the heat exchanger in the cooling unit is located in the vicinity of the air-extraction aperture of the air extractor, adjacent to the drying zone.

Abstract: A reheater is used in air-conditioning system which includes a compressor, a condenser, an expansion valve, and an evaporator, interconnected by conduits in a closed loop. A first conduit coupling a flow of liquid refrigerant through the expansion valve into the evaporator. A second conduit coupling the an outlet of the evaporator to an inlet of the compressor. A third conduit coupling an outlet of the compressor to an inlet of the condenser. A centrifugal pump is coupled to an outlet of the condenser for boosting a pressure of the condensed liquid refrigerant by an incremental pressure sufficient to pressure subcool the refrigerant.

Abstract: A loader device for an automatic space treatment furnace having a longitudinal axis and means for driving the furnace in guided translation along said longitudinal axis. The loader device is disposed in the vicinity of the furnace and comprises both a cartridge-carrying carousel fitted with a set of cartridge holders removably receiving sealed closed cartridges each designed to contain a sample for treatment in said space furnace, the cartridges being disposed in the carousel parallel to its axis of rotation, and a control mechanism for imparting indexed rotary drive to the cartridge holders. The carousel is itself mounted relative to the furnace in such a manner that its axis of rotation forms a predetermined angle a relative to the longitudinal axis of the furnace, and each cartridge holder of the carousel co-operates with a tilting mechanism to enable each cartridge to take up a working position in which the axis of the cartridge is tilted through said predetermined angle .alpha.

Abstract: A refrigeration and heating system has been made in which improved efficiencies are obtained by placing helical concentric coils of at least two generators (80 and 81) and recuperators (86 and 95) on a common axis (232) with a heating unit (84) at the center and allowing the hot combustion gases (245) to circulate in serpentine fashion through separate concentric chambers containing the coils. Further efficiencies are obtained by placing an absorber (97), condenser (100) and recuperator (107) in a single module (270) and by using tube-in-tube or tube-in-cylinder construction with fluted inner tubes. A general purpose, divided-flow, tube-in-cylinder, heat-transfer device (400) is used to reduce the pressure drop in the circulating fluid.

Abstract: An air cooling unit having a hot gas defrost coil disposed below the air cooling coil assembly proximate the condensate pan and a hot gas defrost pipe disposed proximate the lower front edge of the air cooling coil assembly for receiving a heated refrigerant gas.

Abstract: The invention relates to an apparatus for the contactless guidance of webs of material 1. The apparatus has at least two blow nozzles 2, 3, designed as slits or rows of holes, arranged one behind the other in running direction of the web of material 1 and extending transversely to it. The blow jets of these blow nozzles 2, 3 are directed in the same direction and obliquely against the web of meterial 1. On the side towards the web of material 1, flow baffles 12, 12a, 12b, 13 are provided, of which the flow baffle 12 adjoining the rear blow nozzle 2 in running direction of the web of material 1 is curved convexly toward the web of material 1. The flow baffle 12a, 12b between the convexly curved flow baffle 12 and the front blow nozzle 3 is designed as a shock diffuser. With such an apparatus, a web of material 1 is guided free from fluttering even under difficult circumstances.