Abstract: A notifier notifies a user of a warning when a ratio of first refrigerant is different from a suitable value, the ratio being determined from a first difference between a first temperature and a second temperature and from a second difference between a third temperature and a fourth temperature. The first temperature is a temperature of a non-azeotropic refrigerant mixture between a first heat exchanger and a second heat exchanger. The second temperature is a temperature of the non-azeotropic refrigerant mixture between the second heat exchanger and a first expansion valve. The third temperature is a temperature of the non-azeotropic refrigerant mixture between a first decompressor and a first connecting point. The fourth temperature is a temperature of the non-azeotropic refrigerant mixture between a second decompressor and the first connecting point.

Abstract: A liquid distributor delivers a falling flow of the liquid to be distributed substantially uniformly along a longitudinal extent of the liquid distributor. The liquid distributor has a bottom wall including a longitudinally extending distribution plate having a plurality of laterally spaced and longitudinally extending channels. A shell and tube evaporator for chilling a working fluid incorporates the liquid distributor as a distributor of liquid onto the heat exchange tubes of a tube bundle disposed within an interior volume of the shell. Each channel is aligned with a respective column of the plurality of vertical columns of heat exchange tubes and is configured to deliver a falling flow of liquid refrigerant onto the respective tube column substantially uniformly along the longitudinal extent of the respective tube column.

Abstract: A clothes dryer is provided. The clothes dryer may include a main body having a drum rotatably installed therein, a circulation channel formed in the main body, the circulation channel defining a path of air that flows through the drum to dry an object to be dried, and a heat pump system having an evaporator, a compressor, an expansion apparatus, and a condenser, the heat pump system cooling and heating air that flows through the circulation channel. The evaporator may be mounted in the circulation channel, and a ‘U’ trap may be positioned below the evaporator in the circulation channel.

Abstract: A flow device for a refrigerant/compressor system is installed between the outlet of an evaporator and the suction port of a compressor. The device includes a floating element that helps inhibit liquid refrigerant from entering the compressor. Under certain conditions where liquid refrigerant discharges from the evaporator, the floating element floats in the discharged liquid. Upon doing so, the float rises to a generally closed position where the float obstructs a main fluid outlet that leads to the compressor. In the closed position, refrigerant can still pass through the flow device, but through a more restricted outlet. To prevent the float from undesirably rising under the impetus of refrigerant vapor flowing at high flow rates, the floating element itself includes a flow-restricting passageway, radial guides, and/or a streamlined shape. The float can be incorporated within a manifold of a multi-coil or multi-circuited heat exchanger.

Abstract: An evaporator for a refrigerating system which prevents droplets of refrigerant from blowing upwards, and a refrigeration apparatus using thereof are provided. The evaporator for a refrigerating system includes a container into which the refrigerant is introduced, and heat exchanger tubes disposed in the container through which a cooled object flows. The evaporator further includes a prevention plate disposed above the heat exchanger tubes so that droplets of the refrigerant, which are blown upwards due to a boiling of the refrigerant, hit the prevention plate.

Abstract: An evaporator for a refrigerating system which prevents droplets of refrigerant from blowing upwards, and a refrigeration apparatus using thereof are provided. The evaporator for a refrigerating system includes a container into which the refrigerant is introduced, and heat exchanger tubes disposed in the container through which a cooled object flows. The evaporator further includes a prevention plate disposed above the heat exchanger tubes so that droplets of the refrigerant, which are blown upwards due to a boiling of the refrigerant, hit the prevention plate.

Abstract: A subcooling unit within a vapor compression refrigerant system contains a controller for controlling the rate of flow of refrigerant into the chamber of the subcooling unit. The controller receives a sensed temperature of the fluid entering a condensing unit within the chamber of the subcooling unit and computes a condensing pressure setpoint for the refrigerant flowing into the chamber of the subcooling unit. The controller is operative to compare the pressure in the subcooling chamber with the condensing pressure setpoint so as to determine whether to possibly increase or decrease the rate of flow of the refrigerant into the chamber of the subcooling unit.

Abstract: The existence of inverted start conditions in a refrigeration chiller is accurately identified by sensing the liquid level in the chiller evaporator. That liquid level is indicative of the location of the chiller's refrigerant charge at start-up. If the sensed liquid level is below a predetermined level, an inverted start condition is verified to exist. Failed starts and chiller system shutdowns are reduced or avoided as compared to systems in which less reliable indicators are used to identify the existence of inverted start conditions.

Abstract: Compression refrigeration apparatus for removing heat from a heat load using a falling film evaporator, operated with an azeotropic refrigerant and utilizing a spray tree distribution system that distributes a refrigerant film on a heat exchange surface by spraying liquid refrigerant onto a surface and allowing the refrigerant to drip onto the primary heat exchange surface. The apparatus allows for efficient recovery of lubricant deposited in the evaporator without redistributing the lubricant within the evaporator. In an alternative embodiment, liquid refrigerant is sprayed onto a mesh screen where it drips onto the primary heat exchange surface.

Abstract: A device according to the present invention comprises one or more compression units for compressing a cooling gas fluid, one or more condensers for cooling and condensing the cooling fluid, an expansion device and one or more evaporators for the evaporation of the expanded coolant, according to which the supply, adjustment and expansion device supplying the evaporator or evaporators is a device in which the supply, adjustment and expansion of the cooling fluid is carried out by a fixed injector nozzle and by an inlet device of varying section depending on the amount of liquid outflowing from the evaporator or evaporators.Preferably, the liquid from the evaporator or evaporators is introduced into a container in which it is collected, so that by sensing the liquid level by means of a probe the inlet device of varying section can be controlled.

Abstract: A refrigeration system which has a heat exchanger wherein refrigerant is evaporated to absorb heat from a fluid to be cooled, said heat exchanger receiving refrigerant from a vapor condensing economizer. The vapor condensing economizer receives liquid refrigerant from a condenser and has an orifice or a series of nozzles to maintain a pressure drop between the condenser and economizer so that a portion of the liquid refrigerant flashes to a vapor in the economizer to absorb heat from the remaining liquid refrigerant in the economizer. Condensing coils containing a cool heat exchange medium are positioned in the economizer to reduce the temperature and pressure in the economizer and to condense the refrigerant vapors back to a liquid for use in the refrigeration cycle.

Abstract: An air cooled centrifugal liquid chiller is disclosed which includes an air cooled condenser exposed to ambient conditions such that, during those times when the temperature of the ambient is at a relatively low level and the chiller is inoperative, refrigerant will tend to migrate to and condense in the air cooled condenser. If this accumulated condensed refrigerant is permitted to then flow by gravity to the evaporator of the chiller, the heat exchange liquid within the tubes thereof may freeze, causing possible damage. In order to prevent this occurrence, the conduit means connecting the air cooled condenser to the evaporator are provided with a trap portion disposed at a level above the maximum level of condensed refrigerant accumulation within the air cooled condenser, which trap portion is vented to a point in the air cooled condenser above said maximum level.

Abstract: A vapor compression refrigeration system which has a multi-stage compressor, a condenser, a flash economizer, an economizer-condenser, a thermal economizer and a chiller. Liquid refrigerant is flashed in the flash economizer such that part of the liquid refrigerant changes state from a liquid to a gas absorbing heat from the remaining liquid refrigerant, the gaseous refrigerant being drawn into the compressor between stages or being condensed by the economizer-condenser within the flash economizer. An economizer damper valve is provided between the compressor and the flash economizer to regulate this flow of gaseous refrigerant to the compressor depending upon the thermal capability of the economizer-condenser to recondense the flashed refrigerant of the flash economizer.