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US 5,806,586 AGranted
Plate heat exchanger with a refrigerant distributor
AssigneeErnst Flitsch GmbH & Co.
InventorsJosef Osthues, Manfred Petz, Bernd Zeitvogel
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AssigneeErnst Flitsch GmbH & Co.
InventorsJosef Osthues, Manfred Petz, Bernd Zeitvogel
Estimating the term…
A device is disclosed for distributing a two-phase refrigerating medium mass flow in a plate evaporator (12). The evaporator has a distribution channel (14) at the inlet side which may receive a refrigerating medium mass flow coming from an expansion valve (10) and several mutually spaced exchanger channels (16) which branch off from the distribution channel (14) in a substantially perpendicular direction. In order to ensure a uniform distribution of the refrigerant medium mass flow (28') among the exchanger channels (16), a porous body (38) is arranged in the distribution channel (14) between the refrigerating medium inlet (26) and the branch-off points of the exchanger channels (16). The porous body (38) is advantageously arranged in an outer throttle insert (32) which extends over at least part of the length of the distribution channel and in whose wall are located additional throttle openings (34) that lead to the exchanger channels (16).
A plate heat exchanger designed as an evaporator receiving a two-phase refrigerant from a distributor, the distributor being adapted to generally uniformly distribute the two-phase refrigerant throughout the evaporator, the distributor comprising an expansion valve supplying two-phase refrigerant, a refrigerant inlet receiving the two-phase refrigerant from the expansion valve, a distributor duct receiving the two-phase refrigerant from the refrigerant inlet, and a plurality of exchanger ducts branched off from the distributor duct at branch points arranged at a distance from one another along the distributor duct, the distributor duct including a porous body having a multiplicity of parallel-throughflow pores arranged between the refrigerant inlet and the branch points of the exchanger ducts, the pores generally uniformly supplying the two-phase refrigerant mass without separating the refrigerant mass into separate gas and liquid components along the length of the porous body, and a throttle insert extending at least part of the length of the distributor duct, the throttle insert housing the porous body therein, and a wall of the throttle insert having a plurality throttle orifices opening to the exchanger ducts supplying two-phase refrigerant to the exchanger ducts with generally equal amounts of the gas component being supplied to each exchanger duct and equal amounts of the liquid component being supplied to each exchanger duct.
A distributing apparatus providing generally uniform distribution of a two-phase mass to a plurality of exchanger ducts in a heat exchanger, the two-phase mass including a gas part and a liquid part, comprising:
A distributor for uniformly distributing a liquid/gas two-phase mass into a plurality of spaced apart exchanger ducts, comprising a porous body receiving the liquid/gas mass and having means for uniformly distributing the liquid/gas mass and preventing separation of a gas from said liquid/gas mass in said porous body, and a hollow throttle receiving said porous body therein and having means for uniformly distributing liquid and gas components of the liquid/gas mass in the plurality of exchanger ducts.
Dependencies are inferred from the claim text.