CN115790212A

CN115790212A - Collector for heat exchange device and heat exchange device

Info

Publication number: CN115790212A
Application number: CN202211548500.XA
Authority: CN
Inventors: 徐坤豪
Original assignee: Granges AB
Current assignee: Granges AB
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-14

Abstract

The invention discloses a current collector for a heat exchange device and the heat exchange device. A header for distributing and/or concentrating fluid in a plurality of parallel arranged heat exchange tubes, the header comprising: a main plate adapted to attach a heat exchange tube; a cover plate adapted for attachment to an inlet and/or outlet duct and attached to the main plate to form a fluid passage; the first bearing plate and the second bearing plate are mutually overlapped and clamped between the main plate and the cover plate; wherein the first and second pressure bearing plates define a pressure bearing cavity therebetween, the pressure bearing cavity being in fluid communication with the fluid passageway. The current collector has the advantages of simple structure, light weight, easy processing and production, low cost, reasonable bearing structure and reliable use, and can be widely applied to heat exchange devices with higher requirements on internal bearing.

Description

Collector for heat exchange device and heat exchange device

Technical Field

The present invention relates generally to the field of heat exchange devices, and more particularly, to a collector for a heat exchange device and a heat exchange device having the same.

Background

At present, human survival faces the severe challenge of global warming, and Freon widely used in the refrigeration industry has potential greenhouse effect influence, so that natural working medium carbon dioxide which is environment-friendly is concerned by the industry, a carbon dioxide system has excellent low-temperature heating performance, and is expected to be popularized in the electric vehicle industry with remarkably reduced low-temperature endurance. However, since the critical pressure of carbon dioxide is high and the critical temperature is low, carbon dioxide is generally used as a refrigerant for an air conditioner of an automobile to operate in a transcritical region, and the operating pressure thereof is relatively high and much higher than that of existing refrigerants (e.g., 1, 2-tetrafluoroethane (R134 a), tetrafluoropropene (HFO 1234 yf), etc.).

Disclosure of Invention

The present invention is directed to solving the above-mentioned problems of the prior art, and provides a current collector for a heat exchange device and a heat exchange device having the same, wherein the current collector has a compact structure with high pressure resistance, and can be applied to an evaporator or an air cooler of a carbon dioxide automobile air conditioner, and also can be applied to other heat exchange devices having a high requirement on internal pressure bearing.

To this end, according to an aspect of the present invention, there is provided a header for a heat exchange device for distributing and/or concentrating a fluid in a plurality of heat exchange tubes arranged in parallel, the header comprising: a main plate adapted to attach a heat exchange tube; a cover plate adapted for attachment to an inlet flow tube and/or an outlet flow tube and attached to the main plate to form a fluid passage; the first bearing plate and the second bearing plate are mutually overlapped and clamped between the main plate and the cover plate; wherein the first and second pressure bearing plates define a pressure bearing cavity therebetween, the pressure bearing cavity being in fluid communication with the fluid passageway.

The present invention may further include any one or more of the following alternatives according to the above technical idea.

In some alternatives, the cover plate is provided with a connection hole for attaching an inlet pipe and/or an outlet pipe, and the first bearing plate is disposed adjacent to the cover plate and is provided with a through hole corresponding to the connection hole.

In certain alternatives, the main plate is provided with a plurality of through slots for attaching heat exchange tubes, and the second bearing plate is disposed adjacent the main plate and provided with a plurality of orifices.

In certain alternatives, the first bearing plate is configured to include first arc-shaped portions that are bulged toward the cover plate, and first connection portions that respectively extend from longitudinal edges of the first arc-shaped portions; the second bearing plate is configured to include second arc-shaped portions bulging toward the first bearing plate, and second connecting portions respectively extending from longitudinal edges of the second arc-shaped portions; the first and second connection portions are sealingly connected to each other in a superposed relationship.

In certain alternatives, the radius of the first arcuate portion is less than the radius of the second arcuate portion.

In certain alternatives, the orifice is configured as a circular hole, the orifice having a diameter D of 3 to 6mm.

In certain alternatives, the through slot is configured as a flat slot having a length W, and the orifice hole has a diameter D of 0.2W to 0.4W.

In certain alternative forms, the cover plate is configured in a U-shape and has a third connecting portion extending along a longitudinal edge thereof to be attached to a surface of the main plate, and the first connecting portion of the first pressure bearing plate and the second connecting portion of the second pressure bearing plate are interposed between the third connecting portion and the surface of the main plate.

In some optional forms, the main plate is formed with flanges at its lateral edges, and the lateral ends of the cover plate, the first bearing plate and the second bearing plate are wrapped and hermetically connected by the flanges.

In certain alternatives, the through slot is configured as a flat slot having a length W, and the first arcuate portion has a radius R _U Is 0.5W to 0.75W.

In certain alternatives, the radius R of the second arcuate portion _L Greater than 1.25R _U 。

According to another aspect of the present invention, there is provided a heat exchange device, including an inlet pipe, an outlet pipe, a first collector, a second collector, and a plurality of parallel heat exchange tubes arranged at intervals between the first collector and the second collector, wherein a heat dissipation fin is disposed between the heat exchange tubes, wherein the first collector and the second collector are the above-mentioned collectors for the heat exchange device, and the heat exchange tubes are microchannel flat tubes.

In some optional forms, the outer peripheral surface of the inflow pipe and/or the outflow pipe is provided with a limiting part, and the limiting part abuts against the outer surface of the current collector to limit the depth of the inflow pipe and/or the outflow pipe inserted into the pressure bearing cavity of the current collector.

In certain alternative forms, the stop portion is configured such that the inlet tube and/or the outlet tube is inserted into at most one third of the height of the pressure-bearing chamber.

The current collector has the advantages of simple structure, light weight, easy processing and production, low cost, reasonable bearing structure and reliable use, and can be widely applied to heat exchange devices with higher requirements on internal bearing. The heat exchange device has flexible spatial layout, is suitable for narrow space in an automobile, and is particularly suitable for an automobile air conditioner adopting carbon dioxide as a refrigerant.

Drawings

Other features and advantages of the present invention will be better understood by the following detailed description of the preferred embodiments when considered in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and in which:

FIG. 1 is a schematic view of a heat exchange device according to one embodiment of the present invention;

FIG. 2 is an enlarged schematic view of a portion of the heat exchange device of FIG. 1;

FIG. 3 is an exploded schematic view of a header according to one embodiment of the present invention and showing an inlet flow tube;

fig. 4 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 2.

Detailed Description

The making and using of the embodiments are discussed in detail below in conjunction with the following figures. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the disclosure, and do not limit the scope of the disclosure. The description herein of the structural positions of the respective components, such as the directions of upper, lower, top, bottom, etc., is not absolute, but relative. When the respective components are arranged as shown in the drawings, these direction expressions are appropriate, but when the positions of the respective components in the drawings are changed, these direction expressions are changed accordingly.

As used herein, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically indicated and limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms herein can be understood by those skilled in the art as appropriate.

Herein, "transverse" refers to the width direction of the component, and "longitudinal" refers to the length direction of the component.

Herein, the terms "first", "second", and "third", etc. are not used to limit the order and number of components unless otherwise noted.

Fig. 1 and 2 show an exemplary embodiment of a heat exchanger device. The heat exchange device includes an inlet flow pipe 10, an outlet flow pipe 20, a first collector 30, a second collector 40, and a plurality of heat exchange tubes 50 arranged in parallel and spaced apart and heat dissipation fins 60 between the heat exchange tubes 50 arranged between the first collector 30 and the second collector 40. In this embodiment, the inlet pipe 10 is connected to the first collector 30 such that the first collector 30 serves to distribute the fluid among the plurality of heat exchange pipes 50 arranged in parallel, the outlet pipe 20 is connected to the second collector 40 such that the second collector 40 serves to concentrate the fluid among the plurality of heat exchange pipes 50 arranged in parallel to form parallel flows among the plurality of heat exchange pipes 50 arranged in parallel, and the heat dissipation fins 60 serve to exchange heat with the fluid (e.g., carbon dioxide) among the heat exchange pipes 50 through an external fluid (e.g., air). It will be appreciated that the arrangement of the inlet and outlet flow tubes is not limited thereto and that other suitable arrangements may be adopted depending on different needs. For example, in some embodiments, the inlet and outlet tubes may be disposed on the same current collector.

In some embodiments, the heat exchange tube 50 may be a microchannel flat tube, which has a large heat exchange area and high heat exchange efficiency, and is more suitable for an automotive air conditioner heat exchanger. In an alternative embodiment, the heat exchange tube 50 may also be a round tube.

The first collector plate 30 and the second collector plate 40 are structurally symmetrical, and for the sake of simplicity, only the first collector plate 30 on one side of the inflow pipe 10 will be described hereinafter and will be referred to as collector plate 30.

With reference to fig. 3 and 4, an embodiment of the collector is shown, which comprises a main plate 32, a cover plate 31, and a first bearing plate 33 and a second bearing plate 34. The main plate 32 is provided with a plurality of through grooves 321 adapted to attach heat exchange tubes, respectively, the cover plate 31 is provided with a connection hole 311 adapted to attach the inlet flow tube 10, and the main plate 32 and the cover plate 31 are attached to each other to form a fluid passage such that fluid entering from the inlet flow tube 10 is distributed into the respective heat exchange tubes through the plurality of through grooves 321. The first pressure bearing plate 33 and the second pressure bearing plate 34 are stacked on each other and interposed between the main plate 32 and the cover plate 31, thereby defining a pressure bearing chamber between the first pressure bearing plate 33 and the second pressure bearing plate 34, and the pressure bearing chamber 35 is in fluid communication with the fluid passageway, that is, the fluid enters the fluid passageway via the pressure bearing chamber 35, and then enters the heat exchange pipe. Therefore, the operating pressure generated by the fluid is mainly born by the pressure-bearing cavity, and the pressure-bearing cavity can bear larger pressure applied to each wall surface by the high-pressure refrigerant, so that the integral structural strength is improved, and the fluid pressure born by the collector is effectively improved.

In order to allow the fluid to enter the fluid passage through the pressure-bearing chamber, in the illustrated embodiment, the first pressure-bearing plate 33 is disposed adjacent to the cover plate 31 and provided with a through hole 331 corresponding to the connection hole 311, and the second pressure-bearing plate 34 is disposed adjacent to the main plate 32 and provided with a plurality of orifices 341. In some embodiments, the orifices 341 are configured as circular holes and are evenly spaced on the second bearing plate 34, and the through grooves 321 are configured as flat grooves having a length W. By adjusting the diameter and the number of the orifices 341, the flow uniformity of the high-pressure fluid in each heat exchange tube can be optimized. In some embodiments, the orifice diameter D is 3 to 6mm. Advantageously, the orifice has a diameter D of between 0.2W and 0.4W.

In some embodiments, the first bearing plate 33 is configured to include first arc-shaped portions 332 that are bulged toward the cap plate 31, and first connection portions 333 that respectively extend from longitudinal edges of the first arc-shaped portions 332. The second bearing plate 34 is configured to include second arc-shaped portions 342 rising toward the first bearing plate 33, and second connecting portions 343 extending from longitudinal edges of the second arc-shaped portions 342, respectively, wherein the first and second connecting

portions

333 and 343 are sealingly connected to each other in an overlapping manner. The first and second bearing plates are constructed to have an arc-shaped structure, which is advantageous in bearing pressure and simplifying a manufacturing process. However, this method is not limited as long as the pressure-bearing cavity space is small enough and the force-bearing structure is reasonable.

Preferably, the radius of the first arc portion 332 is smaller than the radius of the second arc portion 342. The radius here is described in relation to the wall surface of the pressure-bearing chamber, i.e. the radius of the first arc-shaped part in fig. 4 refers to the radius of the arc-shaped surface of the upper wall surface forming the pressure-bearing chamber 35 and is denoted by R _U It is shown that the radius of the second arcuate portion means the radius of the arcuate face forming the lower wall face of the pressure-bearing chamber 35 and is represented by R _L And (4) showing. More preferably, the radius R of the second arc-shaped portion _L Greater than 1.25R _U . Advantageously, the radius R of the first arc-shaped portion _U Is 0.5W to 0.75W.

In some embodiments, the outer peripheral surface of the inlet tube and/or the outlet tube is provided with a limiting part, and the limiting part abuts against the outer surface of the collector to limit the depth of the inlet tube and/or the outlet tube inserted into the pressure bearing cavity of the collector. As shown in fig. 4, taking the inlet pipe 10 as an example, a rib 11 may be provided on the outer peripheral surface thereof to form a stopper, and after the inlet pipe 10 is inserted into the cover plate 31, the rib 11 abuts against the outer surface of the cover plate 31 to realize the stopper. It will be appreciated that the inlet pipe 10 is inserted at least into the pressure-bearing chamber 35 at a position flush with the inner surface of the first pressure-bearing plate 33. Preferably, the stop portion is configured such that the inlet flow duct and/or the outlet flow duct is inserted at most one third of the height of the pressure-bearing chamber. In other words, the depth here covers the range where the insertion end of the inlet and/or outlet flow duct is flush with the inner surface of the first pressure bearing plate to one third of the maximum height of the pressure bearing chamber.

In some embodiments, the cover plate 31 is configured in a U-shape and has a third connecting portion 312 extending along a longitudinal edge to be attached to a surface of the main plate 32. The first connection part 333 of the first pressure receiving plate 33 and the second connection part 343 of the second pressure receiving plate 34 are interposed between the third connection part 312 and the surface of the main plate 32.

The main plate 32 has flanges 322 formed at lateral edges thereof, and the cover plate 31, the first bearing plate 33, and the second bearing plate 34 are wrapped and hermetically connected at lateral ends thereof by the flanges 322. Specifically, after the cover plate 31, the first bearing plate 33 and the second bearing plate 34 are sequentially stacked on the main plate 32, the transverse end portion is wrapped by the flange 322 to limit and fix the transverse end portion of the whole collector, and then, the longitudinal edge of the whole collector can be sealed and fixed at one time by welding between the connecting portions and the surface of the main plate.

It will be appreciated that for good heat dissipation, the various parts of the header may be made of copper, aluminium or an alloy material, preferably aluminium, with a wall thickness of preferably 1.2-2.0 mm. Alternatively, the respective connecting portions are connected using a brazing process. In some embodiments, the first pressure bearing plate 33 and the main plate 32 may be provided as a composite aluminum plate with solder on both sides, so that the cover plate, the first pressure bearing plate, the second pressure bearing plate, and the main plate, and the heat exchange pipe can be welded together cost-effectively. However, this method is not limited thereto, and various other suitable methods may be employed if the welding sealing is satisfied. For example, in the arrangement of fig. 4, the lower side of the cover plate 31 may be attached with solder, the both sides of the second pressure-bearing plate 34 may be attached with solder, and the lower side of the main plate 32 may be attached with solder, in which case the first pressure-bearing plate 33 may be free of solder.

When the heat exchange device using the above-described header is operated, a high-pressure fluid such as carbon dioxide is introduced into the pressure-bearing chamber 35 of the first header 30 from the inflow pipe 10, enters the fluid passage via the plurality of orifices 341, and further enters the respective heat exchange tubes 50, the flow direction of which is shown by arrows in fig. 3. The fluid then enters the second header 40 and exits through the outlet tube 20 after passing through its pressure-bearing chamber. At the same time, the carbon dioxide inside the heat exchange tube 50 transfers heat to the heat radiating fins 60 outside the heat exchange tube, thereby exchanging heat with the outside air.

It is understood herein that the embodiments shown in the figures show only alternative shapes, sizes and arrangements of the collector for a heat exchange device and of the various optional components of the heat exchange device according to the present invention, which are, however, merely illustrative and not limiting, and that other shapes, sizes and arrangements may also be adopted without departing from the spirit and scope of the present invention.

The technical contents and technical features of the present invention have been disclosed above, however, it is understood that those skilled in the art can make various changes and modifications to the concept of the present invention under the inventive concept of the present invention, and all of them fall into the scope of the present invention. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A header for a heat exchange device, said header for distributing and/or concentrating fluid within a plurality of parallel arranged heat exchange tubes, said header comprising:

a main plate adapted to attach heat exchange tubes;

a cover plate adapted for attachment to an inlet flow tube and/or an outlet flow tube and attached to the main plate to form a fluid passage;

the first bearing plate and the second bearing plate are mutually overlapped and clamped between the main plate and the cover plate;

wherein the first and second pressure bearing plates define a pressure bearing cavity therebetween, the pressure bearing cavity being in fluid communication with the fluid passageway.

2. A collector for heat exchange units according to claim 1, wherein said cover plate is provided with connection holes for the attachment of inlet and/or outlet pipes, said first bearing plate being arranged adjacent to said cover plate and being provided with through holes corresponding to said connection holes.

3. A collector for a heat exchange device according to claim 2, wherein said main plate is provided with a plurality of through slots for attaching heat exchange tubes, and said second pressure-bearing plate is arranged adjacent to said main plate and is provided with a plurality of orifices.

4. A collector for heat exchange devices according to claim 3, wherein said first pressure bearing plate is configured to include a first arc-shaped portion bulging toward said cover plate, and first connection portions respectively extending from longitudinal edges of said first arc-shaped portion; the second bearing plate is configured to include second arc-shaped portions bulging toward the first bearing plate, and second connecting portions respectively extending from longitudinal edges of the second arc-shaped portions; the first and second connection portions are sealingly connected to each other in a superposed relationship.

5. A current collector for a heat exchange device according to claim 4, wherein the radius of said first arcuate portion is smaller than the radius of said second arcuate portion.

6. The collector for a heat exchange device according to claim 4, wherein said orifice is configured as a circular hole, said orifice having a diameter D of 3 to 6mm.

7. The collector for a heat exchange device according to claim 6, wherein said through slot is configured as a flat slot of length W, and said orifice has a diameter D comprised between 0.2W and 0.4W.

8. A current collector for a heat exchange device according to claim 4, wherein said cover plate is configured in a U-shape and has a third connecting portion extending along a longitudinal edge thereof for attachment to a surface of said main plate, said first connecting portion of said first pressure bearing plate and said second connecting portion of said second pressure bearing plate being sandwiched between said third connecting portion and said surface of said main plate.

9. A current collector for a heat exchange device according to claim 4, wherein the lateral edges of the main plate are formed with flanges by which the lateral ends of the cover plate, the first pressure bearing plate and the second pressure bearing plate are wrapped and hermetically connected.

10. A collector for a heat exchange device according to claim 4, wherein said through slot is configured as a flat slot of length W, the radius R of said first arc-shaped portion _U Is 0.5W to 0.75W.

11. A current collector for a heat exchange device according to claim 10, wherein the radius R of said second arcuate portion _L Greater than 1.25R _U 。

12. A heat exchange device comprising an inlet tube, an outlet tube, a first collector, a second collector, and a plurality of parallel and spaced heat exchange tubes arranged between the first collector and the second collector, with fins being provided between the heat exchange tubes, wherein the first collector and the second collector are collectors according to any one of claims 1 to 11, and the heat exchange tubes are microchannel flat tubes.

13. The heat exchange device according to claim 12, wherein the outer peripheral surface of the inlet tube and/or the outlet tube is provided with a limiting portion which abuts against the outer surface of the collector to limit the depth of insertion of the inlet tube and/or the outlet tube into the pressure-bearing chamber of the collector.

14. The heat exchange apparatus of claim 13, wherein the retaining portion is configured such that the inlet tube and/or the outlet tube is inserted into at most one third of the height of the pressure-bearing chamber.