摘要:
A fin and tube heat exchanger including a plurality of parallely arranged heat transfer tubes and a plurality of plate-shaped fins provided orthogonally to the heat transfer tubes, each of the heat transfer tubes being in contact with fin collars of the plate-shaped fins, and being inserted along the fin collars.Each fin collar is configured such that a bend is provided in each of a re-flared portion and in a root portion of the fin collar and a flat intermediate portion is formed between the bends. A thickness of the re-flared portion is smaller than a thickness of the root portion. A radius of the bend of the re-flared portion is larger than a radius of the bend of the root portion, and a ratio of the radius and the thickness of the bend of the re-flared portion is one half or more of a ratio of the radius and the thickness of the bend of the root portion.
摘要:
A fin and tube heat exchanger includes a plurality of heat transfer tubes arranged in parallel and a plurality of plate-shaped fins provided orthogonally to the heat transfer tubes, each of the heat transfer tubes is in contact with fin collars of the plate-shaped fins and is inserted along the fin collars. Each fin collar is configured to include a bend in each of a re-flared portion and in a root portion of the fin collar. A thickness of the re-flared portion is smaller than a thickness of the root portion and a radius of the bend of the re-flared portion is larger than a radius of the bend of the root portion.
摘要:
Plate-like fins have notches longer than a longitudinal axis of flat tubes that are placed in the notches. The plate-like fins also have bend portions that are located on projections projecting toward the edges more than the ends of the flat tubes, are formed by bending part of the plate-like fins, erect in a stacking direction in which the plate-like fins are stacked, and are in contact with adjacent ones of the plate-like fins. The height of the bend portions in the stacking direction is the length of a predetermined spacing.
摘要:
The heat exchanger includes heat exchange units. Each of the heat exchange units includes a plurality of plate fins and a plurality of flat tubes. The plate fins are arranged spaced apart from one another at intervals so as to allow air to flow therebetween. The flat tubes each have an L shape by bending and inserted through the plate fins so that a refrigerant flows therethrough in a direction in which the plate fins are arranged. The heat exchange units are combined to each other so as to form a rectangular shape. Thus, heat exchange can be efficiently performed by increasing the mounting area.
摘要:
To obtain a heat transfer tube for a heat exchanger or the like which can obtain predetermined heat transfer performance without increasing in-tube pressure loss.High ridges 22A having 10 to 20 rows with a predetermined height and low ridges 22B with a height lower than the high ridges 22A having 2 to 6 rows between the high ridges 22A and the high ridges 22A are provided on an inner face helically with respect to a tube axial direction.
摘要:
A heat exchanger provided with a plurality of plate-like fins 2 arranged in parallel with a predetermined interval and a plurality of flat-shaped heat transfer pipes 3 inserted in a direction orthogonal to said plate-like fins 2 and through which a refrigerant flows, in which said heat transfer pipe 3 has an outside shape with a flat outer face arranged along an air flow direction and a section substantially in an oval shape and first and second refrigerant flow passages 31a, 31b made of two symmetric and substantially D-shaped through holes having a bulkhead 32 between the two passages inside, which is bonded to said plate-like fin 2 by expanding diameters of said first and second refrigerant flow passages 31a, 31b by a pipe-expanding burette ball.
摘要:
A plate fin includes a slit structure formed by cutting and raising a portion of the plate fin to form an opening facing a flow direction of a fluid and a waffle structure formed by bending a portion of the plate fin to form a protrusion having an angle-shaped cross section which protrudes in a stack direction and having a ridge substantially perpendicular to the air flow direction, and the waffle structure is disposed on the upstream side on the plate fins with respect to the slit structure and a slant length L1 on the upstream side of the waffle structure is smaller than a slant length L2 on the downstream side of the waffle structure.
摘要:
A header that has a configuration in which the header is connected to one end of each of a plurality of flattened pipes of a heat exchanger that flows a refrigerant in parallel to the plurality of flattened pipes disposed in parallel and an interior of the header is divided by one or more division plates in a parallel direction in which the plurality of heat-transfer pipes are disposed in parallel, the header being mounted so as to stand in an up-down direction, and a distributor configured to distribute the refrigerant to each chamber within the header divided by the division plates, are provided.
摘要:
When forming fins and heat transfer tubes by aluminum material, a pressure loss in the tube does not increase and a heat exchanger can be provided having heat transfer performance equal to or higher than a copper tube. The heat exchanger includes fins made of an aluminum material having a low deformation resistance and heat transfer tubes made of an aluminum material having a higher deformation resistance than the aluminum material forming the fins, and on whose internal surface the groove is provided to penetrate the fin to be fixed. It is also arranged that the tube axial direction (a) of the inner surface of the heat transfer tube and the direction (b) of the groove provided on the internal surface of the heat transfer tube are substantially parallel. In this case, the groove direction (b) forms an angle of 0 degrees to 2 degrees with respect to the tube axial direction (a) of the inner surface of the heat transfer tube. The depth of the groove of the heat transfer tube after tube expansion is 0.2 mm to 0.3 mm, and the top width of the ridge top portion is 0.08 mm to 0.18 mm. Further, the number of grooves of the heat transfer tube 20 is 40 to 60, and an apex angle α is 5 degrees to 20 degrees.
摘要:
An air-conditioning apparatus includes an outdoor unit equipped with an outdoor-side heat exchanger formed by inserting a plurality of heat transfer pipes made of a metal material, such as aluminum or an aluminum alloy, into a plurality of fins, and an indoor unit equipped with an indoor-side heat exchanger formed by inserting a plurality of heat transfer pipes made of a metal material, such as aluminum or an aluminum alloy, into a plurality of fins. The heat transfer pipes in the outdoor-side heat exchanger are each internally provided with a plurality of straight grooves substantially parallel to the pipe axial direction. The heat transfer pipes in the indoor-side heat exchanger are each internally provided with a plurality of spiral grooves having a predetermined lead angle.