CN213238538U

CN213238538U - Microchannel heat exchanger and contain its battery box

Info

Publication number: CN213238538U
Application number: CN202020960733.0U
Authority: CN
Inventors: 郑时红; 赵云鹏; 茅新波
Original assignee: Zhejiang Yifei Technology Co ltd
Current assignee: Zhejiang Yifei Technology Co ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-05-18
Anticipated expiration: 2030-05-29

Abstract

The utility model relates to a microchannel heat exchanger and contain its battery box, microchannel heat exchanger include splint and casing, and the periphery side spiral winding of splint has the filiform thing, and splint fixed mounting is inside the casing, and forms the miniflow channel between the inside wall of casing and filiform thing, splint and filiform thing and the filiform thing, and the casing still is equipped with rather than the first header and the second header of inside intercommunication. The filaments are spirally wound on the clamping plate, a gap is formed between every two adjacent turns of filaments and the filaments are matched with the shell to form a micro-channel, the side surface of the shell is a heat exchange surface to exchange heat with the outside, and the structure has good processing performance.

Description

Microchannel heat exchanger and contain its battery box

Technical Field

The application relates to the technical field of heat exchangers, in particular to a micro-channel heat exchanger and a battery box comprising the same.

Background

The micro-channel heat exchanger is a heat exchanger with a channel equivalent diameter of 10-1000 μm. The heat exchanger has tens of fine flow channels in the flat tube, and the fine flow channels are connected to the circular headers at both ends of the flat tube. The header is internally provided with a baffle plate to divide the heat exchanger flow passage into a plurality of flows. At present, the micro-channel aluminum flat tube in the industry is widely applied. The micro-channel aluminum flat tube is a thin-wall porous flat tubular material which is prepared by adopting a refined aluminum bar, hot extrusion, and surface zinc spraying anti-corrosion treatment, is mainly applied to air conditioning systems of various refrigerants and is used as a pipeline part for bearing a novel environment-friendly refrigerant. The micro-channel heat exchanger has the characteristics of compact and light structure, high heat exchange efficiency and the like, and is widely applied to the industries of electronics, light industry and the like.

However, the width of the aluminum flat tube cannot be too large due to the production and processing technology of the existing micro-channel aluminum flat tube heat exchanger, because the micro-channel aluminum flat tube is formed by hot extrusion molding, if the width of the micro-channel aluminum flat tube is too large, the extrusion pressure of the micro-channel aluminum flat tube will be very large, so that the width of the micro-channel aluminum flat tube at present is less than 50mm, and the existing micro-channel heat exchanger has certain limitations.

SUMMERY OF THE UTILITY MODEL

The utility model provides a purpose in to not enough among the prior art, and provide a microchannel heat exchanger and contain its battery box, effectively solved microchannel flat aluminum tube width problem that can not be too wide, provide technical thought and means for microchannel flat aluminum tube becomes the material of industry popularization purchase.

The application provides a microchannel heat exchanger, including splint and casing, the periphery side spiral winding of splint has the filiform thing, and splint fixed mounting is inside the casing, and hugs closely between the inside wall of casing and filiform thing, splint and filiform thing and the filiform thing in order to form the miniflow channel, the casing still be equipped with the first header and the second header of miniflow channel intercommunication.

The shell comprises an upper shell and a lower shell, and two end parts of the upper shell and the lower shell are used for sealing and clamping two end parts of the clamping plate respectively.

Wherein the first header and the second header are respectively arranged at two ends of the shell, and the first header or/and the second header are inserted from one side surface of the shell and extend into the bottom part which is opposite to the side surface and is positioned in the shell.

Wherein the cross section of the filament is one of a circle, a triangle or a square.

Wherein, the outer side of the upper shell or/and the lower shell is provided with a fin or a heat-insulating layer.

Wherein, the shell, the filiform object and the clamping plate are all made of metal.

The application still provides a microchannel heat exchanger, including splint and last casing, the splint equipartition has a plurality of bars side by side, goes up the casing and covers the bar to form sealed die cavity, go up the interior top surface of casing and hug closely with the bar and form the miniflow channel, the heat exchanger still is equipped with first collector and the second collector with sealed die cavity intercommunication.

The application still provides a battery box that can be used to new energy automobile, the battery box is equipped with as above the microchannel heat exchanger.

The utility model provides a microchannel heat exchanger through filament spiral winding on splint, and the formation clearance between two adjacent rings of filaments just cooperates the casing to form the microchannel, and the side of casing then is heat-transfer surface and external heat transfer, and this kind of structure has good processing performance, can adopt technological means such as the circular arc of bending, will demonstrate the heat exchanger shape that has spatial structure, has certain inner volume with the microchannel flat tube heat exchanger that "face" form embodied.

Drawings

The present application is further explained by means of the attached drawings, but the embodiments in the attached drawings do not constitute any limitation to the present application, and for a person skilled in the art, other drawings can be obtained from the following drawings without inventive effort.

Fig. 1 is a cross-sectional view of a microchannel heat exchanger in example 1.

Fig. 2 is a schematic structural diagram of the microchannel heat exchanger in example 1 after hiding the upper shell and the lower shell.

Fig. 3 is a schematic structural view of the wire and the upper case in embodiment 1.

Fig. 4 is a schematic structural view of the wire and the splint in embodiment 1.

Fig. 5 is a schematic structural view of the microchannel heat exchanger with fins in example 1.

Fig. 6 is a cross-sectional view of a microchannel heat exchanger with triangular wires in example 1.

Fig. 7 is a cross-sectional view of a microchannel heat exchanger with square wire in example 1.

Fig. 8 is a cross-sectional view of a microchannel heat exchanger in example 2.

FIG. 9 is a sectional view showing the microchannel heat exchanger in example 2 during processing.

Reference numerals: the device comprises an upper shell 1, a metal wire 2, a clamping plate 3, a lower shell 4, a first collecting pipe 5, a second collecting pipe 6, fins 7, a process plate 8, metal strips 9 and a micro-channel 100.

Detailed Description

The present application is further described in conjunction with the following examples.

Example 1

Referring to fig. 1 to 4, the heat exchanger includes a first header 5, a second header 6, a wire 2, a clamping plate 3, and a housing, which includes an upper housing 1 and a lower housing 4. The metal wire 2 is spirally wound on the outer peripheral side of the clamping plate 3, the clamping plate 3 is fixedly installed inside the shell, and the inner side wall of the shell is tightly attached to the metal wire 2, the clamping plate 3, the metal wire 2 and the metal wire 2 to form the micro-channel 100. Referring to fig. 3 and 4, fig. 3 shows a microchannel 100 formed between the wire 2 and the upper housing 1, and fig. 4 shows a microchannel 100 formed between the wire 2 and the splint 3, similarly to the lower housing 4. The micro-channel structure replaces the traditional mode of placing heat exchange tubes to form micro-channels, and gaps formed by the thread pitch of the metal wires 2 are used as the micro-channels 100 for heat exchange media to circulate, so that the micro-channel structure is wide in application range and low in limitation.

In this embodiment, referring to fig. 2, the housing is further provided with a first header 5 and a second header 6 communicating with the microchannels, and both end portions of the upper housing 1 and the lower housing 4 are sealed to both end portions of the holding jig 3, respectively. It should be noted that the first header 5 and the second header 6 may be flat tubes, specifically, aluminum flat tubes, and the ratio of the cross-sectional areas of the first header 5 and the second header 6 may be 0.1 to 10. Preferably, the first header 5 and the second header 6 are respectively arranged at two ends of the shell, and the first header 5 or/and the second header 6 are inserted from the side surface of the shell and extend into the bottom part which is opposite to the side surface and is positioned in the shell. During heat exchange, the heat exchange medium flows in from the first header 5, flows along the formed micro-channels to the second header 6 and flows out of the heat exchanger. When the heat exchange medium flows in the microchannel, the medium exchanges heat with the upper shell 1 and the lower shell 4, the heat energy of the medium is transferred to the upper shell 1 and the lower shell 4, and the upper shell 1 and the lower shell 4 exchange heat with the outside.

In the embodiment, the heat exchanger may be disposed in a plurality of spaced arrangements, and the outer side of the upper casing 1 or/and the lower casing 4 is provided with fins 7. Referring to fig. 5, in order to further enhance heat conduction, an upper fin 7 is additionally installed on the outer side surface of the upper shell 1 and/or the lower shell 4 to increase the heat exchange area and thus enhance the heat exchange effect, as shown in fig. 5, wherein the fin 7 may be obtained by drawing a profile from the upper shell 1 or by welding a stamped or folded metal sheet on the upper shell 1. The fins are arranged between the two adjacent heat exchangers, so that the path and time of the heat exchange medium circulating in the heat exchangers can be further prolonged.

On the other hand, if the upper casing 1 is to be reinforced and insulated, an insulation material such as polyurethane foam, vacuum insulation panel, etc. may be laid on the surface of the upper casing 1, and the heat exchange surface of the heat exchanger is carried by the lower casing 4. Namely, the outer side surfaces of the upper shell 1 or/and the lower shell 4 are/is provided with heat insulation layers.

In this embodiment, the metal wire 2 is a metal wire 2 with a diameter d smaller than 2.5mm, and the metal wire 2 is closely attached to the metal wire 2, the upper shell 1, the clamping plate 3 and the lower shell 4 to form a medium flow channel, so as to form a micro-channel with an equivalent diameter de of 0.001-1 mmWherein de and d have the relationship:

referring to table 1, the heat exchanger can be selected according to the specification requirement of a specific micro flow channel, and the heat exchanger of the embodiment can be suitable for the micro flow channel requirement of various specifications.

Table 1 shows the diameter variation of the wire and the micro-channel in example 1Equivalent weightTable of relationship of diameters.

Table of relationship between wire diameter variation and equivalent diameter of microchannel

Serial number	d	de	Serial number	d	de
						1	2.50	0.924	14	1.20	0.444
2	2.40	0.887	15	1.10	0.407
						3	2.30	0.850	16	1.00	0.370
4	2.20	0.813	17	0.90	0.333
						5	2.10	0.776	18	0.80	0.296
6	2.00	0.739	19	0.70	0.259
						7	1.90	0.702	20	0.60	0.222
8	1.80	0.665	21	0.50	0.185
						9	1.70	0.628	22	0.40	0.148
10	1.60	0.591	23	0.30	0.111
						11	1.50	0.554	24	0.20	0.074
12	1.40	0.517	25	0.10	0.037
						13	1.30	0.481	26	0.05	0.018

Referring to fig. 6 and 7, the cross-section of the wire 2 may be configured to be one of a triangle and a square, in addition to being circular. The heat exchanger can be selected and arranged according to actual requirements, and the applicability of the heat exchanger in the embodiment is enhanced.

It should be noted that the wire 2 is tightly wound on the clamping plate 3 in a spiral winding manner, and there is no gap between the bonding surfaces of the wire 2 and the clamping plate 3, so as to prevent the medium from bouncing or short-circuiting through the gap.

In the present embodiment, the first header 5, the second header 6, the case, the wires 2, and the chucking plate 3 may be all made of a metal material. The clamping plate 3 is a metal plate, the material of the clamping plate can be copper, aluminum or stainless steel, and the like, the thickness of the clamping plate needs to meet the requirement that the metal wire 2 is not deformed when being wound, namely, the flatness needs to be ensured, so that the close attaching degree of the metal wire 2 and the clamping plate 3 is ensured. The upper shell 1 or/and the lower shell 4 is formed by pressing a metal flat plate, the material of the upper shell or/and the lower shell can be copper, aluminum or stainless steel, and the like, and the thickness of the upper shell or/and the lower shell meets the strength requirement required by the pressure of a medium flowing in the micro-channel. To further enhance the heat conduction, fins 7 may be added to the upper shell 1 or/and the lower shell 4 to increase the heat exchange area and thus enhance the heat exchange effect, and specifically, the upper shell 1 or/and the lower shell 4 may be obtained by drawing a profile or by welding a stamped or folded metal sheet. On the other hand, if the shell needs to be reinforced and insulated, heat insulation materials such as polyurethane foam and vacuum insulation boards can be laid on the surface of the lower shell 4, and the heat exchange surface of the heat exchanger is borne by the upper shell 1.

The microchannel heat exchanger processing technology comprises the following steps: step A, winding a metal wire 2 on a clamping plate 3. Specifically, there are three winding schemes in step a. First, the clamping plate 3 does not rotate, the metal wire 2 performs planetary circular motion around the clamping plate 3 by taking the clamping plate 3 as a center, and meanwhile, the clamping plate 3 synchronously performs up-and-down motion required by spiral to form a screw pitch. Secondly, the clamping plate 3 is fixed, and the metal wire 2 does circular motion and moves up and down to perform wrapping. Thirdly, the clamping plate 3 rotates around the center of the clamping plate 3, the metal wire 2 is wound on the clamping plate 3 in a certain output length rhythm, at the moment, the clamping plate 3 can synchronously move in the axis direction with a certain pitch, and the metal wire 2 can also move in the axis direction parallel to the rotation of the clamping plate 3 in a certain pitch.

And step B, assembling the first header 5 and the second header 6 to both sides of the clamping plate 3, then placing the first header and the second header into the upper shell 1 and the lower shell 4, and then welding and sealing the upper shell 1 and the lower shell 4 to manufacture the heat exchanger.

In step B, the welding seal may be one of resistance welding, ultrasonic welding, or high-temperature welding.

Resistance welding: through the resistance that exists between the metal, pass on electric current at two contact surfaces, can form the heat on the contact surface, in certain pressure applying condition, metal ion on two metal contact surfaces begins to be active, finally reaches the effect of closely laminating. In order to further increase the soldering reliability of the metal surface, the metal surface can be coated with flux and the like.

Ultrasonic welding: ultrasonic waves are applied between the metal contact surfaces, the ultrasonic waves cause high-frequency oscillation of metal ions on the contact surfaces, heat is generated, and therefore the metal ions on the contact surfaces mutually penetrate, and the metal contact surfaces are fused together after cooling.

And (3) high-temperature fusion welding: the metal surface is plated or the metal is provided with a coating layer with the melting point lower than the metal body, the coating layer and the coating layer on the metal contact surface are in a molten state at a common high temperature (such as 450-600 ℃), the two metal surface coating layers are mutually fused, and the two metal contact surfaces are tightly bonded together after being cooled.

The above enumerations are only the way of attaching the components tightly, and the attaching manner described in this patent is not limited to the above enumerations. The machining process of the micro-channel heat exchanger is simple and easy, machining and preparation of the micro-channel heat exchanger are facilitated, and the machined heat exchanger has good machining performance and applicability.

The micro-channel flat tube heat exchanger adopting the embodiment can be a flat tube aluminum coiled material with standard size and width (such as the conventional size of 1250mm), can be cut to the required size when producing and manufacturing specific downstream products, and then welds an air inlet pipe and an air outlet pipe at the inlet and outlet of a micro-channel pipeline in a hot-melt welding mode to form the basic form of the heat exchanger.

Adopt the microchannel flat tube heat exchanger of this embodiment simultaneously, have good processing performance, can adopt technological means such as circular arc of bending, will demonstrate with the microchannel flat tube heat exchanger of "face" form, demonstrate the heat exchanger shape that has spatial structure, has certain interior volume. When the microchannel of the heat exchanger with a three-dimensional structure and a certain volume flows through the medium, the heat in the medium can be effectively transferred into the volume space, and the heat exchange of the articles stored in the volume space is realized. And simultaneously, the outside is insulated by laying an insulation material.

Example 2

The present application provides another embodiment of a microchannel heat exchanger, as shown in fig. 8 and 9. The main technical solution of this embodiment is the same as that of embodiment 1, and the features that are not explained in this embodiment are explained in embodiment 1, and are not described herein again. This example differs from example 1 in that: referring to fig. 8, the heat exchanger includes a clamp plate 3 and an upper housing 1, wherein a plurality of metal strips 9 are uniformly distributed on the clamp plate 3, the upper housing 1 covers the metal strips 9 to form a sealed cavity, and the inner top surface of the upper housing 1 is tightly attached to the metal strips 9 and the metal strips 9 to form a micro flow channel 100. The present embodiment is mainly directed to a usage scenario that only single-sided heat exchange is needed, and the obtained effect is the same as that of embodiment 1.

The heat exchanger processing technology of the embodiment comprises the following steps: step a, see fig. 9, inserts a process plate 8 between two clamping plates 3 to form a core.

Step B, winding a metal wire 2 on the plate core; in the step A, the plate core does not rotate, the metal wire 2 performs planetary circular motion around the plate core by taking the plate core as a center, and meanwhile, the plate core synchronously performs up-and-down motion required by spiral to form a screw pitch; or, the plate core is not moved, and the metal wire 2 does circular motion and moves up and down to perform wrapping; or, the plate core rotates around the center of the plate core, the metal wire 2 is wound on the plate core in a certain output length rhythm, and at the moment, the plate core can synchronously move in the axis direction with a certain pitch, or the metal wire 2 can move in the axis direction parallel to the rotation of the plate core with a certain pitch.

And C: cutting the metal wires 2 on both sides of the core to form metal strips 9, and drawing out the process plate 8 to separate the two clamping plates 3; and step D, assembling the first header 5 and the second header 6 to both sides of a single clamping plate 3, then covering the upper shell 1, and then welding and sealing the upper shell 1 and the clamping plate 3 to obtain the heat exchanger.

In step D, the welding seal is one of resistance welding, ultrasonic welding or high temperature welding.

The machining process of the micro-channel heat exchanger is simple and easy, the machining and the preparation of the micro-channel heat exchanger are convenient, the machined heat exchanger has good machining performance and applicability, and in addition, the machining process is particularly suitable for preparing the micro-channel heat exchanger only needing single-side heat exchange.

The micro-channel heat exchanger can be used for a battery box of a new energy automobile. At present, the battery box of the new energy automobile generates a large amount of heat when a battery is used, so that temperature rise in the battery box is caused, the temperature rise to a certain degree can bring influences on the service life of the battery, and harm such as battery combustion and explosion can be brought, so that the temperature of the battery box needs to be managed. The battery box manufactured by adopting the micro-channel heat exchanger of the embodiment has good strength, and can keep the temperature in the battery box within the optimum temperature range of the battery by circulating the flowing medium in the pipeline of the micro-channel heat exchanger and utilizing the high-efficiency heat transfer efficiency of the heat exchanger of the embodiment to transfer the cold quantity of the medium into the battery box.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A microchannel heat exchanger, characterized in that: the device comprises a clamping plate and a shell, wherein filaments are spirally wound on the outer peripheral side of the clamping plate, the clamping plate is fixedly installed inside the shell, the inner side wall of the shell is tightly attached to the filaments, the clamping plate is tightly attached to the filaments and the filaments to form a micro-channel, and the shell is further provided with a first collecting pipe and a second collecting pipe communicated with the micro-channel.

2. The microchannel heat exchanger of claim 1, wherein: the shell comprises an upper shell and a lower shell, and two end parts of the upper shell and the lower shell are respectively clamped at two end parts of the clamping plate in a sealing mode.

3. A microchannel heat exchanger according to claim 1 or 2 wherein: the first header and the second header are provided at both end portions of the casing, respectively.

4. The microchannel heat exchanger of claim 1, wherein: the cross section of the filament is one of a circle, a triangle or a square.

5. A microchannel heat exchanger as set forth in claim 2 wherein: and fins or heat insulation layers are arranged on the outer side surfaces of the upper shell or/and the lower shell.

6. The microchannel heat exchanger of claim 1, wherein: the shell, the filament and the clamping plate are all made of metal.

7. A microchannel heat exchanger, characterized in that: the heat exchanger comprises a clamping plate and an upper shell, wherein a plurality of parallel strips are uniformly distributed on the clamping plate, the upper shell covers the strips to form a sealed cavity, the inner top surface of the upper shell is tightly attached to the strips to form a micro-channel, and the heat exchanger is further provided with a first collecting pipe and a second collecting pipe communicated with the sealed cavity.

8. A battery box, characterized in that the battery box is provided with a microchannel heat exchanger according to any one of claims 1-7.