초록 ▼

An improved condenser for use in air conditioning or refrigeration systems. A pair of spaced headers have a plurality of tubes extending in hydraulic parallel between them and each tube defines a plurality of hydraulically parallel, fluid flow paths between the headers. Each of the fluid flow paths

An improved condenser for use in air conditioning or refrigeration systems. A pair of spaced headers have a plurality of tubes extending in hydraulic parallel between them and each tube defines a plurality of hydraulically parallel, fluid flow paths between the headers. Each of the fluid flow paths has a hydraulic diameter in the range of about 0.015 to about 0.04 inches. Preferably, each fluid flow path has an elongated crevice extending along its length to accumulate condensate and to assist in minimizing film thickness on heat exchange surfaces through the action of surface tension. Heat exchange surfaces may also be provided with microcracks or channels to enhance heat transfer.

대표청구항 ▼

A condenser comprising: a pair of spaced headers arranged to have a vapor inlet and a condensate outlet; a plurality of tubes extending in hydraulic parallel between said headers, each in fluid communication with each of said headers; said tubes having a plurality of discrete hydraulically parallel

A condenser comprising: a pair of spaced headers arranged to have a vapor inlet and a condensate outlet; a plurality of tubes extending in hydraulic parallel between said headers, each in fluid communication with each of said headers; said tubes having a plurality of discrete hydraulically parallel capillary fluid flow paths between said headers; each of said fluid flow paths being noncircular in cross section and having at least one elongated crevice extending along the length thereof; the hydraulic diameter of each of said flow paths being sufficiently small that surface tension in condensate in said crevice will create an area of relatively lower pressure thus causing a pressure differential whereby condensate in a film elsewhere in said flow path will flow by operation of said pressure differential to said crevice; said hydraulic diameter being in the range of about 0.015 to 0.040 inches, said hydraulic diameter being the cross-sectional area of the corresponding flow path multiplied by four and divided by the wetted perimeter of the corresponding flow path; and, said flow paths having surfaces subjected to vapor and condensate and including microcracks.