CN201116845Y

CN201116845Y - Low wind-resistance pipe fin type air heat exchanger

Info

Publication number: CN201116845Y
Application number: CNU2007200750713U
Authority: CN
Inventors: 姚德林; 戴自振
Original assignee: Individual
Current assignee: Shanghai Hero Hi Tech Ltd By Share Ltd
Priority date: 2007-09-27
Filing date: 2007-09-27
Publication date: 2008-09-17
Anticipated expiration: 2017-09-27

Abstract

The utility model relates to a low wind resistance pipe fin-type air heat exchanger, which comprises a fin and a heat transfer pipe. The utility model is characterized in that the heat transfer pipe is an oblate circle pipe, the long shaft of the oblate circle pipe is on the horizontal direction, the length-width ratio of the cross section of the oblate circle pipe is bigger or is equal to 2, the thickness of the fin is less than or is equal to 0.2mm, a punched hole which is matched with the oblate circle pipe is arranged on the fin, the oblate circle pipe is arranged in the punched hole on the fin, a plurality of punched holes are arrayed on the fin in turn, a plurality of fins are arranged on the oblate circle pipe, the distances of the adjacent fins are less than or are equal to 2mm, gaps are opened on the fins among the punched holes, flanging edges are arranged on the edges of the punched holes of the fins, outer flanging edges are arranged on the top edges of the flanging edges, all the oblate circle pipes and the punched holes of the fins are connected in a tightly expanding way in one time through mechanical expand tube equipment, or are connected in an integral primary forming way in a furnace tank hard-solder mode. The low wind resistance pipe fin-type air heat exchanger of the utility model is that the low wind resistance pipe fin-type air heat exchanger can reduce wind resistance of a heat transfer pipe in large scale, and can improve effective heat transfer area of the heat transfer pipe, thereby improving heat exchange efficiency of the heat exchanger, and leading air conditioners to save energy consumption.

Description

The finned air heat exchanger of a kind of low windage pipe

Technical field

The utility model relates to a kind of air heat exchanger, the finned air heat exchanger of particularly a kind of low windage pipe.

Background technology

Air heat exchanger in the air conditioner refrigerating technology generally adopts the finned heat exchanger of pipe at present, because can there be bigger trailing vortex loss in the finned heat exchanger of pipe at the pipe afterbody when air flows, and the heat transfer area ratio of pipe is diminished, the air flow resistance of the finned heat exchanger of pipe is increased, convection transfer rate reduces, so the heat exchange efficiency of present circular pipe type finned heat exchanger is not high always, greatly reduce the Energy Efficiency Ratio of air-conditioning, can't satisfy existing energy-conservation requirement, therefore demand inventing a kind of new-type air heat exchanger that can increase substantially the heat exchanger heat exchange efficiency urgently.

Summary of the invention

The purpose of this utility model is the finned existing the problems referred to above of heat exchanger of pipe that solve in the prior art hollow modulation refrigeration technique, provides a kind of low windage pipe finned air heat exchanger.The utility model designs the finned air heat exchanger of a kind of low windage pipe, comprise fin, heat-transfer pipe, it is characterized in that: heat-transfer pipe is oblate pipe, the major axis of oblate pipe be level to, the length-width ratio of the cross section of oblate pipe is more than or equal to 2, the thickness of fin is smaller or equal to 0.2 millimeter, the punching that matches with oblate pipe is arranged on fin, oblate pipe is positioned at the punching on the fin, be aligned in sequence with a plurality of punchings on the fin, fin on the oblate pipe has multi-disc, and the spacing of adjacent fins has the bar seam smaller or equal to 2 millimeters on the fin between the punching, on the edge of the punching of fin flange is arranged, apical margin at flange has flanging, connects through a swelling of mechanical expanding equipment between the punching of oblate pipe of all of whole heat exchanger and fin, or connects with the shaping of burner hearth brazing mode one piece.The sideline of the cross section of oblate pipe by major axis to two tops be circular arc, between two circular arcs by the smooth connection of smooth curve of evagination, the major axis that oblate pipe is positioned at the windward side to the top arc radius more than or equal to the major axis of lee face to the top arc radius.Oblate pipe is an elliptical tube.Fin is an aluminium foil.The utility model has the advantages that the windage that can reduce heat-transfer pipe significantly, improve effective heat transfer area of heat-transfer pipe, thereby improve the heat exchange efficiency of heat exchanger, make air-conditioning save energy consumption.

Description of drawings

Accompanying drawing 1 is a Facad structure schematic diagram of the present utility model,

Accompanying drawing 2 is a side structure schematic diagram of the present utility model,

Accompanying drawing 3 is an oblate pipeline shape schematic diagram of the present utility model,

Accompanying drawing 4 oval-shaped oblate pipeline shape schematic diagrames of the present utility model,

Below in conjunction with drawings and Examples the utility model is elaborated,

The specific embodiment

Comprise fin 1 among the figure, heat-transfer pipe, it is characterized in that: heat-transfer pipe is oblate pipe 2, the major axis of oblate pipe 2 be level to, the length-width ratio of the cross section of oblate pipe 2 is more than or equal to 2, the thickness of fin 1 is smaller or equal to 0.2 millimeter, the punching 3 that matches with oblate pipe 2 is arranged on fin 1, oblate pipe 2 is positioned at the punching 3 on the fin 1, be aligned in sequence with a plurality of punchings 3 on the fin 1, fin 1 on the oblate pipe 2 has multi-disc, the spacing of adjacent fins 1 is smaller or equal to 2 millimeters, on the fin between the punching 31, have bar seam 4, on the edge of the punching 3 of fin 1 flange 5 is arranged, flanging 6 is arranged at the apical margin of flange 5, connect through a swelling of mechanical expanding equipment between the punching 3 of oblate pipe 2 of all of whole heat exchanger and fin 1, or connect with the shaping of burner hearth brazing mode one piece.The sideline of the cross section of oblate pipe 2 by major axis to two tops be between 7, two circular arcs 7 of circular arc by the smooth curve 8 smooth connections of evagination, the major axis that oblate pipe 2 is positioned at the windward side to top circular arc 7 radiuses more than or equal to the major axis of lee face to top circular arc 7 radiuses.Oblate pipe 2 is an elliptical tube.Fin 1 is an aluminium foil.

After heat exchanger adopts the oblate pipe 2 of low windage, when air when orthodrome 7 ends of oblate pipe 2 long axis directions flow to 7 of the roundlet arcs of rear end, the trailing vortex loss that forms is little, and flow air increases with the oblate pipe 2 peripheral areas that closely contact, and the thermal-convection resistance of air side is reduced; Wetted perimeter (contact area) increases when oblate pipe 2 inner refrigerants flow through oblate pipe 2 inner surfaces, and disturbance is strengthened; Since oblate pipe 2 pipes apart from than the tube pitch of pipe from reducing, so fin 1 efficient improves, the heat transfer effective area increases.Under same heat (cold) load, can reduce heat transfer temperature difference, thereby reduce (rising) condensation (evaporation) temperature and row's (suction) atmospheric pressure, reduce compression ratio, compressor load is alleviated, total power input reduces, and under the condition of same refrigeration (heating) amount, compressor can be with little one grade, heat exchanger also can suitably reduce, the adding amount of cryogen can reduce, simultaneously because reducing of trailing vortex realized that aerodynamic noise reduces.

Claims

1, the finned air heat exchanger of a kind of low windage pipe, comprise fin, heat-transfer pipe, it is characterized in that: heat-transfer pipe is oblate pipe, the major axis of oblate pipe be level to, the length-width ratio of the cross section of oblate pipe is more than or equal to 2, the thickness of fin is smaller or equal to 0.2 millimeter, the punching that matches with oblate pipe is arranged on fin, oblate pipe is positioned at the punching on the fin, be aligned in sequence with a plurality of punchings on the fin, fin on the oblate pipe has multi-disc, and the spacing of adjacent fins has the bar seam smaller or equal to 2 millimeters on the fin between the punching, on the edge of the punching of fin flange is arranged, apical margin at flange has flanging, connects through a swelling of mechanical expanding equipment between the punching of oblate pipe of all of whole heat exchanger and fin, or connects with the shaping of burner hearth brazing mode one piece.

2, by the finned air heat exchanger of the described a kind of low windage pipe of claim 1, it is characterized in that: the sideline of the cross section of oblate pipe by major axis to two tops be circular arc, between two circular arcs by the smooth connection of smooth curve of evagination, the major axis that oblate pipe is positioned at the windward side to the top arc radius more than or equal to the major axis of lee face to the top arc radius.

3, by the finned air heat exchanger of the described a kind of low windage pipe of claim 1, it is characterized in that: oblate pipe is an elliptical tube.

4, by the finned air heat exchanger of the described a kind of low windage pipe of claim 1, it is characterized in that: fin is an aluminium foil.