CN111121497A

CN111121497A - Novel regenerator structure

Info

Publication number: CN111121497A
Application number: CN202010067219.9A
Authority: CN
Inventors: 徐博涵; 邓荣斌; 张泽斌
Original assignee: Zhengzhou Kelin Motor Vehicle Air Conditioning Co Ltd
Current assignee: Zhengzhou Kelin Motor Vehicle Air Conditioning Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-05-08

Abstract

The invention discloses a novel heat regenerator structure which comprises an outer pipe and an inner pipe, wherein the outer pipe is sleeved on the inner pipe, a plurality of mutually non-contact fins are arranged between the inner wall of the outer pipe and the outer wall of the inner pipe, the outer pipe and the inner pipe are fixedly connected through the fins, the fins are uniformly arranged along the circumferential direction and the axial direction of the outer wall of the inner pipe, the fins of two adjacent layers in the circumferential direction are mutually staggered, and the fins of two adjacent layers in the axial direction are mutually staggered. According to the novel heat regenerator structure provided by the invention, the heat exchange area between cold and hot fluids can be increased by adopting the intermittent rib type heat regeneration pipeline structure, the strength between the inner sleeve and the outer sleeve can be enhanced, and the novel heat regenerator structure has larger disturbance on the fluid from the flow mechanism, is favorable for the development and formation of a fluid boundary layer, and improves the heat exchange efficiency of the fluid at the outer side, the fins and the outer wall of the inner pipe.

Description

Novel regenerator structure

Technical Field

The invention belongs to the field of regenerative tubes, and particularly relates to a novel regenerator structure.

Background

The regenerative utilization technology is most commonly used in large power generation/heating units, but with the continuous progress of the technology, the technology is gradually introduced into air conditioning units to realize the purpose of providing greater performance with less energy consumption.

However, the current structural research on the heat circuit is mainly based on these conventional types of internally threaded pipes and separate support structures. Therefore, the new regenerative pipeline structure is provided to achieve better effect, and has significant meaning.

Although the existing product has high maturity, the structural change is relatively single, and abundant structural designs are needed to meet different requirements. In addition, in view of the improvement of the heat exchange performance of the conventional heat return circuit, from the perspective of the system, the research on the structure of the circuit is less, and the research is still in a relatively preliminary stage.

The traditional ribbed regenerator is characterized in that ribs are always directly communicated from a pipeline inlet to a pipeline outlet, and although the heat exchange amount can be increased from the angle of increasing the heat exchange area, the negative influence of the existence of a fluid boundary layer on the heat exchange is larger due to the narrow space in an outer heat exchange cavity of the traditional ribbed regenerator. Chinese patent publication No.: CN101738110B, this technology discloses a double-pipe heat exchanger with deflecting fins spread out with offset on both sides, and proposes to cut off the fins and deflect part of the fins to reduce the influence of the boundary layer, but the influence of the boundary layer is not strong; and because the deflection angle is small, the cocurrent area is objectively reduced, so that the internal flow resistance of the external cavity is increased, and certain limitation still exists.

Disclosure of Invention

In view of the above technical problems in the prior art, an object of the present invention is to provide a novel regenerator structure.

The purpose of the invention is realized by the following technical scheme.

The utility model provides a novel regenerator structure, includes outer tube and inner tube, and the outer tube cup joints in the inner tube, be provided with the mutual contactless fin of a plurality of between outer tube inner wall and the inner tube outer wall, the outer tube passes through fin fixed connection with the inner tube, and the fin evenly sets up along inner tube outer wall's circumference and axial, staggers each other between the adjacent two-layer fin in circumference, staggers each other between the adjacent two-layer fin in axial.

The outer tube, the inner tube and the fins are manufactured integrally by a 3D printer.

The axial clearance between two axially adjacent ribs is larger than the length of a single rib in the axial direction.

The invention has the beneficial effects that: the novel heat regenerator structure provided by the invention adopts a discontinuous rib type heat regeneration pipeline structure, so that the heat exchange area between cold and hot fluids can be increased, the strength between the inner and outer sleeves can be enhanced, the novel heat regenerator structure provided by the invention has larger disturbance on the fluid, the development and formation of a fluid boundary layer are favorably damaged, the boundary layer is fundamentally damaged and strong turbulent eddies are generated, the heat exchange is enhanced on the basis of ensuring the same flow area as much as possible, the performance of a heat regeneration pipe is improved, and the heat exchange efficiency of the outside fluid, the fins and the outer wall of the inner pipe is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an exploded view of the present invention.

Figure 3 is a front view of the inner tubular structure of the present invention.

In the figure, 1 is an outer tube, 2 is an inner tube, and 3 is a rib.

Detailed Description

As shown in figures 1-3, the novel heat regenerator structure is particularly suitable for air conditioning units, and is used for improving the heat exchange efficiency of the air conditioning units and ensuring that the air conditioning units have better performance. This novel regenerator structure includes outer tube 1 and inner tube 2, and outer tube 1 cup joints in inner tube 2, be provided with a plurality of each other contactless fin 3 between 1 inner wall of outer tube and the 2 outer walls of inner tube, outer tube 1 and inner tube 2 pass through 3 fixed connection of fin, and fin 3 evenly sets up along the circumference and the axial of the 2 outer walls of inner tube, staggers each other between adjacent two-layer fin 3 in circumference, staggers each other between adjacent two-layer fin 3 in the axial. It should be noted that any one of the two circumferentially adjacent layers of fins means that a row of fins arranged axially along the outer wall of the inner tube is one layer, and any one of the two axially adjacent layers of fins means that a circle of fins arranged circumferentially along the outer wall of the inner tube is one layer. Wherein, the axial direction refers to the direction along the axis of the cylinder; circumferential means in the direction around the cylinder axis, perpendicular to the axis and perpendicular to the cross-sectional radius.

The outer tube 1, the inner tube 2 and the fins 3 are integrally manufactured by a 3D printer, namely the novel heat regenerator is manufactured and processed by the 3D printer, and the novel heat regenerator is beneficial to processing and manufacturing. The 3D printer is the prior art and does not belong to the design concept of the invention.

The novel heat regenerator can also use a compression fusion welding mode to fix and process the processed inner tube 2, the processed outer tube 1 and the processed fins 3. The pressing fusion welding mode refers to a processing mode of fixedly connecting the copper plate and the steel plate of the plate heat exchanger.

Further, the axial gap between two axially adjacent ribs 3 on the outer wall of the inner tube 2 is larger than the length of a single rib 3 in the axial direction, which is advantageous for breaking the boundary layer of the fluid.

The working principle of the invention is as follows: the circumference of the outer wall of the inner pipe 2 is provided with six fins 3 in a circle, namely, the regenerator has six layers of fins in the circumference, an interlayer is formed between the outer wall of the inner pipe 2 and the inner wall of the outer pipe 1, a plurality of fins 3 which are not in contact with each other are arranged in the interlayer, a plurality of fins 3 which are not in contact with each other form a discontinuous rib, the interlayer is an external cavity, and the inner side of the inner pipe 2 forms an internal cavity. Fluid with different temperatures is introduced into the inner cavity and the outer cavity, and the fluid in the inner cavity and the fluid in the outer cavity exchange heat through the fins 3 and the inner tube 2, so that the temperature of the fluid with lower temperature is increased, and the temperature of the fluid with higher temperature is reduced.

In the heat exchange process, due to the existence of the discontinuous ribs in the external cavity, the heat exchange area of the fluid in the internal cavity and the external cavity corresponding to the unit tube length is increased, and the heat exchange quantity is improved; because the axial arrangement of the fins 3 is discontinuous type, that is, the fins 3 are not continuous in front and back of the regenerative tube but discontinuous and have gaps, it can also be understood that gaps exist between the fins in one layer of fins on the outer wall of the inner tube 2 in the circumferential direction, and the fins 3 in two adjacent layers in the circumferential direction are staggered, so that the boundary layer formed by the fluid in the external cavity on the continuous ribs is damaged by the gaps, and the heat exchange efficiency is improved from the heat transfer mechanism. In addition, the circumferential fins 3 on the outer wall of the inner tube 2 are arranged in a row, namely, the fins 3 on two adjacent layers in the axial direction are staggered, so that the fluid in the external cavity can be disturbed and divided by the interrupted ribs ceaselessly, the boundary layer is fundamentally damaged, turbulent eddies are formed among the adjacent fins 3, and the heat exchange efficiency on the unit regenerative tube is further improved in the aspect of heat transfer mechanism.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical solutions of the present invention, and it should be noted that those skilled in the art, on the premise of the technical solutions of the present invention, may make further improvements and changes, and these improvements and changes should be covered within the protection scope of the present invention.

Claims

1. A novel regenerator structure is characterized in that: including outer tube (1) and inner tube (2), outer tube (1) cup joints in inner tube (2), be provided with a plurality of mutual contactless fin (3) between outer tube (1) inner wall and inner tube (2) outer wall, outer tube (1) and inner tube (2) pass through fin (3) fixed connection, and fin (3) are evenly set up along the circumference and the axial of inner tube (2) outer wall, stagger each other between adjacent two-layer fin (3) in circumference, stagger each other between adjacent two-layer fin (3) in the axial.

2. The novel regenerator structure of claim 1, wherein: the outer tube (1), the inner tube (2) and the fins (3) are manufactured integrally through a 3D printer.

3. The novel regenerator structure of claim 1, wherein: the axial clearance between two adjacent ribs (3) in the axial direction is larger than the length of a single rib (3) in the axial direction.