CN208155134U - A kind of novel plate-fin heat exchanger fin - Google Patents

Abstract

The utility model discloses a kind of novel plate-fin heat exchanger fins, it is made of plain fin and 1/4 spherical backpack body, it is cracked on plate by cutter first, then go out to intersect 1/4 spherical backpack body of the square arrangement of protrusion and recess by mould punching, last roll forming, main structure parameters include：Fin heighth _f , fin thicknessδ _f , spacing in wings _f , 1/4 spherical backpack body radiusR, adjacent backpack body spacing c _f , backpack body to fin back gaugeb _f ；The novel plate-fin heat exchanger fin, pass through membrane support between adjacent fins, partition room is sealed by sealing strip, and fluid is flowed into along vertical backpack body opening direction, and special construction is able to achieve the flowing of the multiplies such as suitable, inverse, cross-current, when fluid flows through or enters backpack body, local velocity not only can be improved, boundary layer is thinned, increase temperature gradient, and strong Secondary Flow is generated, improve its comprehensive performance；The Novel fin monnolithic case is identical as common fin, versatility with higher.

Description

A New Type of Plate-fin Heat Exchanger Fins

technical field

The utility model relates to a novel plate-fin heat exchanger fin, which belongs to the technical field of enhanced heat exchange and industrial energy saving.

Background technique

Plate-fin heat exchanger is a kind of general-purpose thermal power mechanical equipment. Because of its high heat transfer coefficient, good energy-saving effect, compact structure, light weight, aluminum structure and other excellent performances, it has been rapidly developed in various fields. It was mainly used in the automobile and aviation industries in the early days, and has been widely used in aviation, automobiles, diesel locomotives, construction machinery, air separation, petrochemical, refrigeration, air conditioning, cryogenic and other fields. my country began to develop plate-fin heat exchangers in the mid-1960s. There are three types of fins: straight fins, perforated fins and zigzag fins.

The plate-fin heat exchanger has outstanding advantages. Therefore, strengthening the theoretical research and product development of the plate-fin heat exchanger will make it play a role in a wider range of fields. For my country's energy saving and consumption reduction, enterprises can reduce production costs and improve equipment efficiency. It is of great significance to reduce operation and maintenance costs. But now in our country, the level of research and development and manufacturing of plate-fin heat exchangers is low, and the research and development capabilities are weak. There is no independent property right in this area, and the fins that can be produced are single. The main fins are imported, and the fins are plate-fin heat exchangers. The core part of the heat exchanger, the design of the fin will directly affect the heat exchange effect of the entire plate-fin heat exchanger.

Contents of the invention

In order to overcome the above deficiencies, the utility model provides a novel plate-fin heat exchanger fin, which can increase the fluid velocity in the flow channel, thin the boundary layer, and increase the temperature gradient. When the fluid flows through or enters the 1/4 spherical inclusion, a strong secondary flow is generated, thereby greatly improving its comprehensive performance.

The technical solution adopted by the utility model is: the fins of the new plate-fin heat exchanger are combined by straight fins and 1/4 spherical inclusions, and the feature is that: the fin material is aluminum, first Slits are made on the bare board, and then punched out with intersecting protrusions and depressions, and 1/4 spherical inclusions arranged in a square, and finally rolled into shape according to the size.

The fins of the new plate-fin heat exchanger have the same overall dimensions as ordinary fins, and have good versatility. Not only can they perfectly replace the original fins, but they can also be used alone or in combination with ordinary fins.

The 1/4 spherical inclusions are intersected with protrusions and depressions on the fins, and are arranged in a square shape. When the fluid flows through or enters the 1/4 spherical inclusions, the strong secondary flow generated continuously impacts the inclusions, thinning the fluid Boundary layer, so that the overall heat transfer performance is better than that of ordinary plate-fin heat exchanger fins.

The main structural parameters of the fins of the new plate-fin heat exchanger are: fin height h _f , fin thickness δ _f , fin inner spacing s _f , 1/4 spherical inclusion radius R , and adjacent inclusion spacing c _f , the distance from the enclosure to the edge of the fin b _f , different standard fins correspond to the corresponding structural parameters to optimize the performance.

For the fins of the new plate-fin heat exchanger, the inner area of the fins forms a flow channel for the medium to flow and exchange heat. The adjacent fins are supported by partitions, and the adjacent partitions are sealed by sealing strips. Flow in from the direction of the slit of the body, so that the fluids of different layers do not merge with each other, and realize the flow forms such as forward flow, countercurrent flow, and cross flow of fluids in different fin layers.

Compared with the ordinary fins of the existing plate-fin heat exchanger, the beneficial effects of the utility model are: 1. The flow channel formed by the new fin, when the fluid flows through or flows into the 1/4 spherical inclusion in the flow channel, The fluid flows in vertically at the bulge of the 1/4 spherical inclusion. At the inclusion, the upper and lower fluids of the straight fins collide with each other to form a local pressure difference, thereby generating longitudinal vortices and secondary flows, leading the mainstream to impact the inclusion. Surface, so that the velocity gradient at the inclusion body is improved; 2. The new type of plate-fin heat exchanger fins, the uneven velocity and pressure distribution of the fluid in the flow channel form the flow velocity in the local area, thereby thinning the boundary layer; 3 , Very good versatility, not only can perfectly replace the original fins, but also can be used alone or mixed with ordinary fins. 4. Each standard fin corresponds to the corresponding structural parameters, so that the performance can be optimized.

Description of drawings

Figure 1 is an overall schematic diagram of the fins of the new plate-fin heat exchanger.

Figure 2 is a front view of the fins of the new plate-fin heat exchanger.

Figure 3 is a left view of the fins of the new plate-fin heat exchanger.

Figure 4 is a distribution diagram of the adjacent flow passages of the fins of the new plate-fin heat exchanger.

Figure 5 is a schematic cross-sectional view of the fin assembly of the new plate-fin heat exchanger.

Reference signs: 1-partition plate; 2-1/4 spherical inclusion; 3-fin; 4-flow channel 1; 5-flow channel 2; 6-flow channel 3; 7-sealing strip.

Explanation of symbols: W - fin width; L - fin length; h _f - fin height; δ _f - fin thickness; s _f - fin inner spacing; R - inclusion radius; c _f - adjacent inclusion spacing ; b _f - the distance from the enclosure to the edge of the fin.

Detailed ways

Taking the fin with a fin height of 9.5mm and a fin thickness of 0.2mm as an example, the utility model is further described in conjunction with the accompanying drawings.

Figure 1 is the overall schematic diagram of the fins of the new plate-fin heat exchanger, Figure 2 is the front view of the fins of the new plate-fin heat exchanger, and Figure 3 is the left view of the fins of the new plate-fin heat exchanger, where: fin width is W , fin length is L , fin height h _f =9.5mm, fin thickness δ _f =0.2mm, inner fin spacing s _f =1.7mm, inclusion radius R =0.9mm, adjacent inclusion spacing c _f =2.7mm, the distance from the enclosure to the edge of the fin b _f =1.8mm, Figure 4 is the distribution of the adjacent flow passages of the fins of the new plate-fin heat exchanger, the inlet of the flow passage is perpendicular to the opening of the 1/4 spherical enclosure The seam direction includes flow channel 1[4], flow channel 2[5], and flow channel 3[6], which can form flow forms such as forward flow, reverse flow, and cross flow, and can meet the flow of multiple flows.

In the flow channel formed by the fins of the plate-fin heat exchanger of the utility model, when the fluid flows through or flows into the 1/4 spherical inclusion in the flow channel, the fluid flows in vertically at the opening of the 1/4 spherical inclusion, and at the inclusion , the mutual impact of the fluids on both sides of the straight fins forms a local pressure difference, thereby generating longitudinal vortices and secondary flows, guiding the main flow to impact the inner surface of the enclosure, and improving the velocity gradient at the enclosure; due to the fluid flow in the channel The uneven distribution of velocity and pressure causes the flow velocity in the high-velocity area to increase, thereby thinning the boundary layer; in summary, this special structure accelerates the local flow velocity in the flow channel, thins the boundary layer, increases the temperature gradient, and produces a strong secondary The flow has significantly enhanced the comprehensive ability.

The processing method for the fins of the new plate-fin heat exchanger will be further described below in conjunction with the accompanying drawings.

Preparatory stage: According to the size, the aluminum plate of the corresponding size is cut.

Slit stage: Slit according to the corresponding size on the aluminum plate.

Stamping stage: the slit plate is put into the mold, and a 1/4 spherical inclusion body with a square arrangement of intersecting protrusions and depressions is punched out on the mold.

Rolling stage: The stamped plate is rolled on a rolling machine to form the fins of the new plate-fin heat exchanger.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (3)

1. a kind of novel plate-fin heat exchanger fin, it is characterised in that：The novel plate-fin heat exchanger fin is by plain fin It is combined into 1/4 spherical backpack body, novel plate-fin heat exchanger fin inner flow passage forms media flow heat exchange area, and fluid is along vertical Straight 1/4 spherical backpack body opening direction flows into, by membrane support between adjacent novel plate-fin heat exchanger fin, between adjacent separator It is sealed by sealing strip.

2. novel plate-fin heat exchanger fin according to claim 1, it is characterised in that：1/4 spherical backpack body is to pass through head It first cracks on plate, then mould punching forms, and protrusion and recess is intersected on novel plate-fin heat exchanger fin, in pros Shape arrangement.

3. novel plate-fin heat exchanger fin according to claim 1, it is characterised in that：The primary structure of the fin is joined Number depends on：Fin heighth _f , fin thicknessδ _f , spacing in wings _f , backpack body radiusR , adjacent backpack body spacing c _f , backpack body to fin Back gaugeb _f 。