Micro-channel heat exchanger

Abstract

The utility model relates to the field of heat exchangers, in particular to a micro-channel heat exchanger. The micro-channel heat exchanger is provided with a core body, and the core body comprises a plurality of identical quadrangular hot plates and cold plates which are sequentially and alternately stacked and welded from top to bottom; the bottom surface of the cold plate and the hot plate form a first heat exchange channel; the bottom surface of the hot plate and the cold plate form a first heat exchange channel, the bottom surface of the hot plate and the cold plate form a second heat exchange channel, the first heat exchange channel and the second heat exchange channel are each composed of a plurality of tiny channels, each tiny channel of the first heat exchange channel is of a Z-shaped structure, each Z-shaped structure is composed of three flow guide channels, the first flow guide channel and the third flow guide channel are in an arc shape, and the first flow guide channel and the second flow guide channel are in an arc shape. The micro-channel heat exchanger has the advantages of being compact in structure, high in efficiency, capable of bearing high temperature and high pressure, free of tube bundle vibration, small in needed safe discharge volume and the like, compared with a traditional shell-and-tube heat exchanger, the size and the weight are reduced by 85%, meanwhile, a medium for exchanging heat can flow more smoothly through the Z-shaped micro-channels of the arc structure, and the heat exchange efficiency is improved. And the abrasion of fine channels is reduced.

Description

Technical Field

[0001] The present application relates to a heat exchanger, and in particular to a microchannel heat exchanger. Background Art

[0002] The microchannel heat exchanger has the advantages of compact structure, high efficiency, ability to withstand high temperature and high pressure, no tube bundle vibration, and small required safe discharge volume. Compared with the traditional shell and tube heat exchanger, the volume and weight are reduced by 85%. At the same time, the first heat exchange channel of the present application adopts a Z-shaped micro-channel with an arc structure. After adopting this structure, the medium for exchanging heat can flow more smoothly in the pipeline, reduce the resistance encountered by the medium when flowing in the channel, reduce the wear caused by friction between the medium and the sharp points of the pipeline, and extend the service life of the microchannel heat exchanger. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a microchannel heat exchanger. The microchannel heat exchanger adopts a heat exchange channel with an arc Z-shaped structure.

[0004] In order to achieve the above-mentioned purpose, the utility model has the following structure:

[0005] A microchannel heat exchanger, the heat exchanger comprising a core;

[0006] The core body comprises a plurality of identical quadrilateral hot plates and cold plates which are alternately stacked and welded from top to bottom;

[0007] The bottom surface of the cold plate and the hot plate form a first heat exchange channel;

[0008] The bottom surface of the hot plate and the cold plate form a second heat exchange channel;

[0009] The first heat exchange channel and the second heat exchange channel are both composed of a plurality of fine channels;

[0010] The fine channel of any of the first heat exchange channels is a Z-shaped structure, and the Z-shaped structure includes a first guide channel, a second guide channel and a third guide channel, the first guide channel and the third guide channel are both arc-shaped channels, the second guide channel is a straight channel extending along the long side of the quadrilateral plate, the first guide channel and the second guide channel are connected in a through-connection manner, the second guide channel and the third guide channel are connected in a through-connection manner, and the first guide channel, the second guide channel and the third guide channel together constitute the Z-shaped structure.

[0011] In the microchannel heat exchanger, the lengths of the microchannels of any of the first heat exchange channels of the Z-shaped structure are the same.

[0012] In the microchannel heat exchanger, the microchannel of any one of the second heat exchange channels is a straight line structure, and the straight line structure extends along the direction of the long side of the quadrilateral cold plate.

[0013] In the microchannel heat exchanger, the cross-section of any of the microchannels of the first heat exchange channel and any of the microchannels of the second heat exchange channel on the surface of the core is either an arcuate or rectangular shape.

[0014] In the microchannel heat exchanger, the quadrilateral hot plate and the cold plate are both rectangular structures.

[0015] In the microchannel heat exchanger, the core also includes two cover plates, the length and width of which are the same as those of the heat plates, and are respectively arranged above the topmost plate of the core and below the bottommost plate of the core.

[0016] In the microchannel heat exchanger, the cover plate is formed by stacking and welding a number of identical flat plates from top to bottom.

[0017] In the microchannel heat exchanger, the heat exchanger also includes a pair of hot side tube boxes and a pair of cold side tube boxes, the pair of hot side tube boxes are respectively arranged at the inlet and outlet of the first heat exchange channel, and the pair of cold side tube boxes are respectively arranged at the inlet and outlet of the second heat exchange channel.

[0018] In the microchannel heat exchanger, the pair of hot side tube boxes and the pair of cold side tube boxes are both provided with circular through holes, and the circular through holes are both matched with circular conduits.

[0019] The microchannel heat exchanger of the utility model has the advantages of compact structure, high efficiency, high temperature and high pressure resistance, no tube bundle vibration, and small required safe discharge volume. Compared with the traditional shell and tube heat exchanger, the volume and weight are reduced by 85%. At the same time, the first heat exchange channel of the present application adopts a Z-shaped fine channel with an arc structure. After adopting this structure, the medium for exchanging heat can flow more smoothly in the pipeline, reduce the resistance of the medium flowing in the channel, reduce the wear caused by the friction between the medium and the sharp point of the pipeline, and extend the service life of the microchannel heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view of the core of the present application;

[0021] Figure 2 A top view of the cold plate of the present application;

[0022] Figure 3 A top view of the heat plate of the present application;

[0023] Figure 4A front view of the core of the present application;

[0024] Figure 5 It is a right side view of the core of the present application;

[0025] Figure 6 A front view of the hot side pipe box and the circular conduit of the present application;

[0026] Figure 7 An assembly diagram of the microchannel heat exchanger of the present application;

[0027] Explanation of symbols: 1 hot plate, 2 cold plate, 3 first guide channel, 4 second guide channel, 5 third guide channel, 6 cross section of fine channel of first heat exchange channel, 7 cross section of fine channel of second heat exchange channel, 8 flat plate, 9 hot side pipe box, 10 inlet (outlet) surface of first channel, 11 inlet (outlet) surface of second channel, 12 circular conduit, 13 cold side pipe box. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present utility model.

[0029] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. "First" and "second" are not qualifiers, but are only for explanation to facilitate understanding of the technical solution of the utility model. The contents involved in "first" and "second" can be interchangeable. Generally speaking, the terms "including" and "comprising" only indicate that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0030] Unless otherwise specifically stated, the components, relative arrangements, functions, and numerical values ​​described in these embodiments do not limit the scope of the utility model. At the same time, it is obvious that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods, and equipment known to ordinary technicians in the relevant fields are not described in detail for the time being, but where appropriate, the techniques, methods, and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of step-by-step embodiments may have different sequences.

[0031] The present application relates to a microchannel heat exchanger, which includes a core; Figure 1 The core comprises a plurality of identical quadrilateral hot plates 1 and cold plates 2 which are alternately stacked and welded from top to bottom; the bottom surface of the cold plate 2 and the hot plate 1 form a first heat exchange channel; the bottom surface of the hot plate 1 and the cold plate 2 form a second heat exchange channel; the first heat exchange channel and the second heat exchange channel are both composed of a plurality of fine channels.

[0032] Further, such as Figure 3 As shown, the microchannel of any one of the first heat exchange channels in the microchannel heat exchanger is a Z-shaped structure, and the Z-shaped structure includes a first guide channel 3, a second guide channel 4 and a third guide channel 5, and the first guide channel 3 and the third guide channel 5 are both arc-shaped channels, and the second guide channel 4 is a straight channel extending along the long side of the quadrilateral plate, the first guide channel and the second guide channel are connected through, and the second guide channel and the third guide channel are connected through, and the first guide channel, the second guide channel and the third guide channel together constitute the Z-shaped structure.

[0033] Further, such as Figure 3 As shown, the microchannel of the Z-shaped first heat exchange channel of the microchannel heat exchanger starts from the long side of the quadrilateral heat plate 1 and ends at the through channel on the other long side corresponding to the quadrilateral heat plate 1.

[0034] Further, such as Figure 3 As shown, the arc shape of the first guide channel 3 and the third guide channel 5 of the microchannel heat exchanger is a quarter sector with an angle of 90 degrees.

[0035] Further, such as Figure 3 As shown, the lengths of the microchannels of the first heat exchange channel of any Z-shaped structure in the microchannel heat exchanger are the same.

[0036] Further, such as Figure 3 As shown, the micro channels of the first heat exchange channel of any Z-shaped structure in the microchannel heat exchanger are arranged in parallel.

[0037] Further, such as Figure 3 As shown, the intersection of the longest arc-shaped microchannel in the first guide channel of the microchannel heat exchanger and the long side of the heat plate 1 is the starting point, and the distance from the starting point to the short side of the heat plate 1 closer to the starting point is the radius of the shortest arc in the first guide channel, and the shortest arc refers to the arc-shaped microchannel with the shortest arc length in the first guide channel.

[0038] Further, such as Figure 2 As shown, the microchannel of any one of the second heat exchange channels of the microchannel heat exchanger is a straight line structure, and the straight line structure extends along the direction of the long side of the quadrilateral cold plate 2.

[0039] Further, such as Figure 2 As shown, the microchannel of any second heat exchange channel of the microchannel heat exchanger starts from the short side of the cold plate 2 and extends in a straight line structure to a through channel on the other short side of the cold plate 2 .

[0040] Further, such as Figure 2 As shown, in the fine channels of the straight structure in the second heat exchange channel of the microchannel heat exchanger, the distance between the outermost fine channel and the long side of the closer cold plate 2 is equal, and the distance is the radius of the shortest arc in the first guide channel, and the long side of the closer cold plate 2 refers to the long side of the cold plate 2 on the side that is closer to the outermost fine channel.

[0041] Further, such as Figure 4 and Figure 5 As shown, the cross sections 6 and 7 of the microchannels of any of the first heat exchange channels and any of the second heat exchange channels of the microchannel heat exchanger on the surface of the core are either arcuate or rectangular.

[0042] Further, such as Figure 1-3 As shown, in the microchannel heat exchanger, the quadrilateral hot plate 1 and the cold plate 2 both adopt a rectangular structure.

[0043] Further, such as Figure 1 As shown, in the microchannel heat exchanger, the core also includes two cover plates, the length and width of the cover plates are the same as those of the heat plate 1, and are respectively arranged above the topmost plate of the core and below the flat plate 8 of the bottommost layer of the core. The cover plates are formed by stacking and welding a number of identical flat plates 8 from top to bottom.

[0044] Further, such as Figure 1 As shown, in the microchannel heat exchanger, the thickness of the upper cover plate and the lower cover plate are both the radius of the shortest arc in the first flow guide channel.

[0045] Further, such as Figure 3 As shown, the radius of the shortest arc in the first flow guiding channel is greater than the tube box thickness, which refers to the larger material thickness between the material thickness of the hot side tube box 9 and the material thickness of the cold side tube box 13 .

[0046] Further, such as Figure 6 and Figure 7As shown, the microchannel heat exchanger also includes a pair of hot side tube boxes 9 and a pair of cold side tube boxes 13. The pair of hot side tube boxes 9 are respectively arranged at the inlet and outlet 10 of the first heat exchange channel, and the pair of cold side tube boxes 13 are respectively arranged at the inlet and outlet 11 of the second heat exchange channel.

[0047] Further, such as Figure 7 As shown, in the microchannel heat exchanger, the pair of hot side tube boxes 9 and the pair of cold side tube boxes 13 are components with the same size and structure.

[0048] Further, such as Figure 6 As shown, the pair of hot side pipe boxes 9 and the pair of cold side pipe boxes 13 are centrally symmetrical structures of the hollow cavity.

[0049] Further, such as Figure 6 As shown, in the heat exchanger of the microchannel heat exchanger, the pair of hot side tube boxes 9 and the pair of cold side tube boxes 13 are both provided with circular through holes at the central axis positions, and the circular through holes are both equipped with circular conduits 12.

[0050] like Figure 7 As shown, the cold medium gas and liquid flow into the second heat exchange channel from the circular conduit 12 of the cold side pipe box 13 for inlet, pass through the linear second heat exchange channel, and flow out from the cold side pipe box 13 on the other side.

[0051] At the same time, the heat medium gas and liquid enter the Z-shaped first heat exchange channel from the circular conduit 12 of the hot side pipe box 9 for inlet, pass through the first guide channel 3, the second guide channel 4 and the third guide channel 5, and then flow out from the circular conduit 12 of the hot side pipe box 9 for outlet on the other side.

[0052] In the core of the microchannel heat exchanger, the hot and cold fluids in the first heat exchange channel and the second heat exchange channel flow along their own independent microchannels respectively. The hot and cold fluids are guided through a series of microchannels, which are millimeter-level, so that the contact area between the hot and cold fluids and the inner wall of the core in the microchannel is sufficient, and the hot and cold fluids exchange heat with the wall of the microchannel respectively during the flow process.

[0053] On this basis, the present application adopts the first heat exchange channel with an arc Z-shaped structure, which can make the heat medium that exchanges heat flow more smoothly in the pipeline, reduce the resistance encountered by the medium when flowing in the channel, and better maintain the flowing gas and liquid in a laminar state. Such a structure can not only improve the efficiency of heat exchange, but also reduce the wear caused by friction between the heat medium and the sharp points of the pipeline, thereby extending the service life of the microchannel heat exchanger.

[0054] The first heat exchange channel with the arc Z-shaped structure can also reduce the heat generated by the friction between the heat medium and the pipeline, thereby improving the heat exchange efficiency.

[0055] The above is an explanation of the utility model and should not be considered as a limitation thereof. Although several exemplary embodiments of the utility model are described, it will be easily understood by those skilled in the art that many modifications can be made to the exemplary embodiments without departing from the technical features of the utility model. Therefore, all these modifications are intended to be included in the scope of the utility model as defined in the claims. It should be understood that the above is an explanation of the utility model and should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included in the scope of the attached claims. The utility model is defined by the claims and their equivalents.

Claims

1. A microchannel heat exchanger, characterized in that: The heat exchanger comprises a core; The core body comprises a plurality of identical quadrilateral hot plates and cold plates which are alternately stacked and welded from top to bottom; The bottom surface of the cold plate and the hot plate form a first heat exchange channel; The bottom surface of the hot plate and the cold plate form a second heat exchange channel; The first heat exchange channel and the second heat exchange channel are both composed of a plurality of fine channels; The fine channel of any of the first heat exchange channels is a Z-shaped structure, and the Z-shaped structure includes a first guide channel, a second guide channel and a third guide channel, the first guide channel and the third guide channel are both arc-shaped channels, the second guide channel is a straight channel extending along the long side of the quadrilateral plate, the first guide channel and the second guide channel are connected in a through-connection manner, the second guide channel and the third guide channel are connected in a through-connection manner, and the first guide channel, the second guide channel and the third guide channel together constitute the Z-shaped structure.

2. A microchannel heat exchanger according to claim 1, characterized in that: The lengths of the micro channels of the first heat exchange channel of any of the Z-shaped structures are the same.

3. A microchannel heat exchanger according to claim 2, characterized in that: Any of the micro channels of the second heat exchange channel is a straight line structure, and the straight line structure extends along the direction of the long side of the quadrilateral cold plate.

4. A microchannel heat exchanger according to claim 3, characterized in that: The cross-section of any of the micro-channels of the first heat exchange channel and any of the micro-channels of the second heat exchange channel on the surface of the core is either an arcuate shape or a rectangular shape.

5. A microchannel heat exchanger according to claim 4, characterized in that: The quadrilateral hot plate and cold plate are both rectangular structures.

6. A microchannel heat exchanger according to claim 5, characterized in that: The core body also includes two cover plates, the length and width of which are the same as those of the heat plates, and are respectively arranged above the uppermost plate of the core body and below the lowermost plate of the core body.

7. A microchannel heat exchanger according to claim 6, characterized in that: The cover plate is formed by stacking and welding a number of identical flat plates from top to bottom.

8. A microchannel heat exchanger according to claim 7, characterized in that: The heat exchanger also includes a pair of hot side tube boxes and a pair of cold side tube boxes. The pair of hot side tube boxes are respectively arranged at the inlet and outlet of the first heat exchange channel, and the pair of cold side tube boxes are respectively arranged at the inlet and outlet of the second heat exchange channel.

9. A microchannel heat exchanger according to claim 8, characterized in that: The pair of hot side pipe boxes and the pair of cold side pipe boxes are both provided with circular through holes, and the circular through holes are both matched with circular conduits.

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