Inventors:
Peter Shlak - Staten Island NY
George Premaza - Bell Meade NJ
Assignee:
White Consolidated Industries, Inc. - Cleveland OH
International Classification:
F25B 3900
Abstract:
A multipass evaporator for an air conditioner includes a pair of spaced-apart and parallel headers, a plurality of microchannels extending between and connected to the headers, at least one throttling microchannel extending between and connected to the headers, and at least two baffles provided within the headers. The baffles are located in the headers to divide the plurality of microchannels and the throttling microchannel into at least three passes. The three passes include a first pass, a last pass, and at least one intermediate pass between the first pass and the last pass. The first pass includes the throttling microchannel which provides a desired restriction to obtain constant enthalpy expansion so that no restriction device is required between a condenser and the evaporator. Alternate embodiments are disclosed wherein an intermediate pass includes a throttling microchannel to reduce the mean temperature difference of the evaporator, the last pass of a multipass condenser includes a throttling microchannel, and the first passes of at least two parallel, multipass evaporators are provided with throttling microchannels having different restrictions so that the evaporators have generally equal mean temperature differences during operation.