CN115420037B

CN115420037B - Microchannel heat exchange device and heat exchange equipment

Info

Publication number: CN115420037B
Application number: CN202210976843.XA
Authority: CN
Inventors: 普成龙; 刘元财; 张泫舜; 王雷; 陈熙
Original assignee: Ecoflow Technology Ltd
Current assignee: Ecoflow Technology Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-12-15
Anticipated expiration: 2042-08-15
Also published as: CN115420037A

Abstract

The application relates to the technical field of heat exchange equipment, and provides a microchannel heat exchange device and heat exchange equipment, wherein the microchannel heat exchange device comprises a heat exchange piece and an interface piece, the heat exchange piece comprises a grid part, the grid part is provided with at least two rows of microchannels which are sequentially arranged along a first direction, each row of microchannels comprises a plurality of refrigerant channels and a plurality of heat exchange fluid channels, the plurality of refrigerant channels are arranged at intervals along a second direction, and one heat exchange fluid channel is arranged between two adjacent refrigerant channels; the refrigerant channels in one row of micro-channels and the heat exchange fluid channels in the other adjacent row of micro-channels are sequentially arranged along a first direction, the first direction and a second direction are mutually perpendicular, and the interface piece is used for guiding the refrigerant to the refrigerant channels and guiding the heat exchange fluid to the heat exchange fluid channels. For the heat exchange fluid channel, the heat exchange fluid channel is adjacent to the refrigerant channel in the first direction and the second direction, and the heat exchange area is large, so that the heat exchange efficiency between the refrigerant and the heat exchange fluid is improved.

Description

Microchannel heat exchange device and heat exchange equipment

Technical Field

The application belongs to the technical field of heat exchange equipment, and particularly relates to a micro-channel heat exchange device and heat exchange equipment.

Background

The heat exchange device is generally applied to air conditioning equipment, air energy water heater, heat supply equipment and other equipment needing heat exchange, for example, the air conditioning equipment generally realizes heat release or refrigeration to the outside through an evaporator and a condenser therein, and the evaporator and the condenser are collectively called as a heat exchange device in the technical field of air conditioning. At present, many researches are mainly focused on how to improve the heat exchange efficiency of a heat exchange device, and most of the existing heat exchange devices improve the heat exchange efficiency by improving the heat conductivity of materials or reducing the thickness of inner plates of the existing heat exchange devices, however, the improvement of the heat exchange efficiency of the heat exchange devices by the means is not obvious, so that the requirements of high-efficiency heat exchange required by the current heat exchange equipment are difficult to meet.

Disclosure of Invention

The embodiment of the application aims to provide a micro-channel heat exchange device and heat exchange equipment, which are used for solving the technical problem of low heat exchange efficiency of the heat exchange device in the prior art.

In order to achieve the above purpose, the application adopts the following technical scheme: provided is a microchannel heat exchange device, comprising:

the heat exchange piece comprises a grid part, wherein the grid part is provided with at least two rows of micro-channels which are sequentially arranged along a first direction, each row of micro-channels comprises a plurality of refrigerant channels and a plurality of heat exchange fluid channels, the plurality of refrigerant channels are arranged at intervals along a second direction, and one heat exchange fluid channel is arranged between two adjacent refrigerant channels; the refrigerant channels in one row of the micro channels and the heat exchange fluid channels in the other adjacent row of the micro channels are sequentially arranged along the first direction, wherein the first direction and the second direction are mutually perpendicular; and

The interface piece is arranged on the heat exchange piece and is provided with a refrigerant inlet, a refrigerant outlet, a heat exchange fluid inlet and a heat exchange fluid outlet, wherein the refrigerant inlet is communicated with the inlets of the plurality of refrigerant channels, and the refrigerant outlet is communicated with the outlets of the plurality of refrigerant channels; the heat exchange fluid inlet is in communication with the inlets of the plurality of heat exchange fluid channels, and the heat exchange fluid outlet is in communication with the outlets of the plurality of heat exchange fluid channels.

The application also provides heat exchange equipment which comprises a refrigerant loop, a heat exchange fluid loop and the micro-channel heat exchange device, wherein the micro-channel heat exchange device is communicated with the refrigerant loop and the heat exchange fluid loop.

The micro-channel heat exchange device provided by the application has the beneficial effects that: compared with the prior art, the microchannel heat exchange device comprises a heat exchange piece and an interface piece, wherein the heat exchange piece comprises a grid part, the grid part is provided with at least two rows of microchannels which are sequentially arranged along a first direction, each row of microchannels comprises a plurality of refrigerant channels and a plurality of heat exchange fluid channels, the plurality of refrigerant channels are arranged at intervals along a second direction, and one heat exchange fluid channel is arranged between two adjacent refrigerant channels; the refrigerant channels in one row of micro-channels and the heat exchange fluid channels in the other adjacent row of micro-channels are sequentially distributed along a first direction, the first direction is mutually perpendicular to a second direction, the interface piece is connected with the heat exchange piece, and the refrigerant can enter the refrigerant channels through the refrigerant inlets of the interface piece and flow out from the refrigerant outlets after passing through the refrigerant channels; the heat exchange fluid enters the heat exchange fluid channel through the heat exchange fluid inlet of the interface piece and flows out from the heat exchange fluid outlet after passing through the heat exchange fluid channel, so that for the heat exchange fluid channel, two adjacent micro channels in the first direction are refrigerant channels, two adjacent micro channels in the second direction are refrigerant channels, the heat exchange area is large, the heat exchange efficiency between the refrigerant and the heat exchange fluid is improved, and the micro-channel heat exchange device is miniaturized.

The heat exchange equipment provided by the application has the beneficial effects that: compared with the prior art, the heat exchange device has the advantages that the micro-channel heat exchange device is used as an evaporator or a condenser of the heat exchange device, so that the micro-channel heat exchange device is connected with a refrigerant loop for inflow and outflow of cooling medium, the micro-channel heat exchange device is also communicated with a heat exchange fluid loop for inflow and outflow of heat exchange fluid, and the cooling medium and the heat exchange fluid realize heat exchange in the micro-channel heat exchange device, thereby realizing better refrigerating or heating effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a microchannel heat exchange device according to an embodiment of the present application;

FIG. 2 is a schematic view of the cross-sectional structure of FIG. 1 in the longitudinal direction;

Fig. 3 is a schematic front view of a micro-channel heat exchange device according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of FIG. 3 along the direction A-A;

FIG. 5 is an enlarged view of the portion I of FIG. 4;

FIG. 6 is a schematic cross-sectional view of FIG. 3 along the direction B-B;

FIG. 7 is an enlarged view of the portion II of FIG. 6;

FIG. 8 is a cross-sectional view of FIG. 3 taken along the direction C-C;

FIG. 9 is an enlarged view at III in FIG. 8;

FIG. 10 is a schematic diagram of the overall structure of a microchannel heat exchanger according to another embodiment of the present application;

FIG. 11 is a schematic view of the cross-sectional structure of FIG. 10 in the longitudinal direction;

fig. 12 is a front view of fig. 10;

FIG. 13 is a schematic view of the cross-sectional structure of FIG. 12 along the direction D-D;

FIG. 14 is an enlarged view at IV of FIG. 13;

fig. 15 is an enlarged view of v in fig. 13;

FIG. 16 is a schematic view of the cross-sectional structure of FIG. 12 along the direction E-E;

FIG. 17 is a schematic cross-sectional view of FIG. 12 along the direction F-F;

fig. 18 is a schematic block diagram of a heat exchange device according to an embodiment of the present application.

Wherein, each reference sign in the figure:

10. a heat exchange member; 11. A grid part; 111. A grill core;

1111. a refrigerant passage; 1112. A heat exchange fluid passage; 1113. An inner wall;

112. an outer housing; 1121. An outer wall; 12. A first direction;

13. A second direction; 14. A first flow guiding part; 141. A first set of flow directing channels;

1411. a refrigerant liquid inlet channel; 1412. A heat exchange fluid outlet channel; 142. A first deflector;

143. a first return portion; 144. A refrigerant liquid inlet arc surface; 15. A second flow guiding part;

151. a second set of flow directing channels; 1511. A refrigerant liquid outlet channel; 1512. A heat exchange fluid inlet channel;

152. an arc-shaped surface for refrigerant liquid outlet;

20. an interface member; 21. A refrigerant inlet; 22. A heat exchange fluid outlet;

23. a heat exchange fluid inlet; 24. A refrigerant outlet;

30. a heat exchange member; 31. A refrigerant passage; 311. A first refrigerant branch;

312. a second refrigerant branch; 32. A heat exchange fluid passage; 321. A first heat exchange fluid bypass;

322. a second heat exchange fluid branch; 33. A first flow guiding part; 331. A first set of flow directing channels;

3311. a refrigerant liquid inlet channel; 3312. A heat exchange fluid outlet channel; 34. A second flow guiding part;

341. a second set of flow directing channels; 3411. A refrigerant liquid outlet channel; 3412. A heat exchange fluid inlet channel;

40. An interface member; 41. A refrigerant inlet; 42. A heat exchange fluid outlet;

43. a heat exchange fluid inlet; 44. A refrigerant outlet; 50. A guide section;

51. a first chamber; 511. A first sidewall; 52. A second chamber;

521. a second sidewall; 53. Guiding the core; 531. A first set of drainage channels;

5311. a refrigerant leading-out channel; 5312. A heat exchange fluid introduction passage; 532. A second set of drainage channels;

5321. a heat exchange fluid extraction channel; 5322. A refrigerant introduction passage; 60. An outer tube body;

71. a refrigerant circuit; 711. A compressor; 72. A heat exchange fluid circuit;

721. a water pump; 722. A fan coil.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The microchannel heat exchange device provided by the embodiment of the application is now described. The heat exchange efficiency of the existing heat exchange device is mostly improved by improving the heat conductivity of materials or reducing the thickness of an inner plate of the heat exchange device, however, the improvement of the heat exchange efficiency of the heat exchange device by the means is not obvious, so that the requirement of high-efficiency heat exchange of the existing heat exchange device is difficult to meet.

The microchannel heat exchange device of the present application is described in detail below with reference to the accompanying drawings:

referring to fig. 1 to 7, a microchannel heat exchanger according to an embodiment of the application includes a heat exchange member 10 and an interface member 20.

Referring to fig. 7, the heat exchange member 10 includes a grille portion 11, where the grille portion 11 includes at least two rows of micro-channels sequentially arranged along a first direction 12, each row of micro-channels includes a plurality of refrigerant channels 1111 and a plurality of heat exchange fluid channels 1112, the plurality of refrigerant channels 1111 are arranged at intervals along a second direction 13, and one heat exchange fluid channel 1112 is disposed between two adjacent refrigerant channels 1111; the refrigerant channels 1111 in one row of micro-channels and the heat exchange fluid channels 1112 in the adjacent other row of micro-channels are arranged in sequence along a first direction 12, wherein the first direction 12 is perpendicular to the second direction 13. Having one heat exchange fluid passage 1112 between two adjacent refrigerant passages 1111 may mean that there is and only one heat exchange fluid passage 1112 between two adjacent refrigerant passages 1111 in the second direction 13.

The number of rows of microchannels may be selected to be multiple rows depending on the actual design requirements. The refrigerant channel 1111 is used for flowing refrigerant, the heat exchange fluid channel 1112 is used for flowing heat exchange fluid such as water, etc., and the refrigerant and the heat exchange fluid realize heat exchange in the micro-channel heat exchange device. The flow directions of the refrigerant and the heat exchange fluid in the micro-channel heat exchange device can be the same or opposite, and when the flow directions of the refrigerant and the heat exchange fluid in the micro-channel heat exchange device are opposite, a better heat exchange effect can be realized. Through the above micro-channel structure, the refrigerant channels 1111 and the heat exchange fluid channels 1112 are arranged in the first direction 12 and the second direction 13 in a crossing manner, that is, two adjacent micro-channels can be respectively circulated with refrigerant and heat exchange fluid.

The grill portion 11 may be made of a material such as stainless steel or other alloy materials, as desired. The grill portion 11 is mainly manufactured by an integral molding process, such as an additive manufacturing technique, or by a casting or plastic molding method.

In which, referring to fig. 1, the interface 20 is disposed on the heat exchange member 10, and the interface 20 is formed with a refrigerant inlet 21, a refrigerant outlet 24, a heat exchange fluid inlet 23, and a heat exchange fluid outlet 22. Referring to fig. 4 and 5, the refrigerant inlet 21 communicates with inlets of the plurality of refrigerant passages 1111, and the heat exchange fluid outlet 22 communicates with outlets of the plurality of heat exchange fluid passages 1112; referring to fig. 6 and 7, the refrigerant outlet 24 communicates with outlets of the plurality of refrigerant passages 1111; the heat exchange fluid inlet 23 communicates with the inlets of the plurality of heat exchange fluid channels 1112. The interface 20 is connected to the heat exchange member 10, and is mainly used for guiding the refrigerant and the heat exchange fluid to the refrigerant channel 1111 and the heat exchange fluid channel 1112, respectively. For example, referring to fig. 1, the refrigerant enters the refrigerant channel 1111 through the refrigerant inlet 21 of the interface 20, passes through the refrigerant channel 1111 and then flows out through the refrigerant outlet 24; similarly, the heat exchange fluid enters the heat exchange fluid channel 1112 through the heat exchange fluid inlet 23 of the interface 20, passes through the heat exchange fluid channel 1112, and then flows out of the heat exchange fluid outlet 22.

The specific structure and form of the interface 20 are not limited, and the specific structure, shape, etc. of the micro-channel are not particularly limited, and may be a linear channel structure or a curved channel structure. The cross section of the micro-channel can be circular, triangular or polygonal, or other shapes.

Compared with the prior art, the microchannel heat exchange device provided by the application comprises a heat exchange piece 10 and an interface piece 20, wherein the heat exchange piece 10 comprises a grille part 11, the grille part 11 is provided with at least two rows of microchannels which are sequentially arranged along a first direction 12, each row of microchannels comprises a plurality of refrigerant channels 1111 and a plurality of heat exchange fluid channels 1112, the plurality of refrigerant channels 1111 are arranged at intervals along a second direction 13, and one heat exchange fluid channel 1112 is arranged between two adjacent refrigerant channels 1111; the refrigerant channels 1111 in one row of micro-channels and the heat exchange fluid channels 1112 in the other adjacent row of micro-channels are sequentially arranged along the first direction 12, and the first direction 12 is perpendicular to the second direction 13; the interface piece 20 is connected with the heat exchange piece 10, and the refrigerant can enter the refrigerant channel 1111 through the refrigerant inlet 21 of the interface piece 20 and flow out from the refrigerant outlet 24 after passing through the refrigerant channel 1111; the heat exchange fluid enters the heat exchange fluid channel 1112 through the heat exchange fluid inlet 23 of the interface 20, and flows out from the heat exchange fluid outlet 22 after passing through the heat exchange fluid channel 1112, so that for the heat exchange fluid channel 1112, two adjacent micro channels in the first direction 12 are refrigerant channels 1111, and two adjacent micro channels in the second direction 13 are also refrigerant channels 1111, therefore, the heat exchange area is large, and the heat exchange efficiency between different fluids is improved.

In another embodiment of the present application, referring to fig. 2 and 5, the heat exchange member 10 further includes a first guiding portion 14 and a second guiding portion 15, wherein the first guiding portion 14 is disposed on the grille portion 11, the refrigerant inlet 21 and the heat exchange fluid outlet 22 are respectively located on opposite sides of the first guiding portion 14, and the first guiding portion 14 is used for communicating the refrigerant inlet 21 with the plurality of refrigerant channels 1111 and also for communicating the heat exchange fluid outlet 22 with the plurality of heat exchange fluid channels 1112. The second guiding portion 15 is disposed on the grille portion 11, the refrigerant outlet 24 and the heat exchange fluid inlet 23 are respectively disposed on two opposite sides of the second guiding portion 15, and the second guiding portion 15 is configured to communicate the refrigerant outlet 24 with the plurality of refrigerant channels 1111 and also configured to communicate the heat exchange fluid inlet 23 with the plurality of heat exchange fluid channels 1112.

Specifically, in the present embodiment, the refrigerant sequentially enters the plurality of refrigerant channels 1111 through the refrigerant inlet 21 and the first guiding portion 14, and the refrigerant in the refrigerant channels 1111 sequentially flows out through the second guiding portion 15 and the refrigerant outlet 24, as shown in fig. 2, 3, 4 and 5; the heat exchange fluid sequentially enters the heat exchange fluid channel 1112 through the heat exchange fluid inlet 23 and the second diversion part 15, and the heat exchange fluid in the heat exchange fluid channel 1112 sequentially flows out through the first diversion part 14 and the heat exchange fluid outlet 22; this achieves that the flow directions of the fluid in the refrigerant passage 1111 and the heat exchange fluid passage 1112 are opposite. The flow directions of the refrigerant and the heat exchange fluid are opposite, so that the real-time and efficient heat exchange effect of the refrigerant and the heat exchange fluid can be ensured, and the integral heat exchange efficiency of the device is improved.

In another embodiment of the present application, referring to fig. 5, the first diversion portion 14 has at least two first diversion channel groups 141 sequentially arranged along the first direction 12, and each first diversion channel group 141 corresponds to each row of micro-channels one by one; the first diversion channel group 141 includes a refrigerant liquid inlet channel 1411 and a heat exchange fluid liquid outlet channel 1412 which are arranged along the first direction 12, and the refrigerant liquid inlet channel 1411 and the heat exchange fluid liquid outlet channel 1412 extend along the second direction 13; the refrigerant liquid inlet channel 1411 has openings toward the refrigerant inlet 21 and the one row of refrigerant channels 1111 to communicate the refrigerant inlet 21 with the one row of refrigerant channels 1111; the heat exchange fluid outlet channel 1412 has an opening toward the heat exchange fluid outlet 22 and the row of heat exchange fluid channels 1112 to communicate the heat exchange fluid outlet 22 with the row of heat exchange fluid channels 1112.

Specifically, in the present embodiment, the first diversion channel group 141 mainly guides the refrigerant entering from the refrigerant inlet 21 into the refrigerant channel 1111 through the refrigerant liquid inlet 1411, and simultaneously guides the heat exchange fluid in the heat exchange fluid channel 1112 to the heat exchange fluid outlet 22 through the heat exchange fluid liquid outlet 1412 for further discharging. Wherein, the refrigerant liquid inlet channel 1411 and the heat exchange fluid liquid outlet channel 1412 are isolated from each other, and form independent fluid channels for the refrigerant and the heat exchange fluid to circulate respectively.

Optionally, in an embodiment, the first diversion portion 14 includes a plurality of first diversion ribs 142 arranged at intervals along the first direction and parallel to each other, and a first folding portion 143 is disposed between every two adjacent first diversion ribs 142, and the plurality of first diversion ribs 142 and the first folding portion 143 form a reciprocating folding structure. The first deflector 142 and the first return portion 143 may be integrally formed or may be connected to each other. The two adjacent first diversion drain plates 142 and the first reverse-folded part 143 adjacent to the heat exchange fluid outlet 22 enclose to form a refrigerant liquid inlet channel 1411, one side of the two adjacent first diversion drain plates 142 far away from the first reverse-folded part 143 forms an opening of the refrigerant liquid inlet channel 1411 towards the refrigerant inlet 21, one side of the two adjacent first diversion drain plates 142 towards the grille part 11 forms an opening of the refrigerant liquid inlet channel 1411 towards a row of refrigerant channels 1111, so that a stream of refrigerant entering from the refrigerant inlet 21 can be split to be respectively introduced into the row of refrigerant channels 1111, and the structural design is ingenious and practical.

The adjacent two first guide and discharge plates 142 and the first reverse folded portion 143 adjacent to the refrigerant inlet 21 enclose to form a heat exchange fluid liquid channel 1412, one side of the adjacent two first guide and discharge plates 142 away from the first reverse folded portion 143 forms an opening of the heat exchange fluid liquid channel 1412 towards the heat exchange fluid outlet 22, and one side of the adjacent two first guide and discharge plates 142 towards the grille portion 11 forms an opening of the heat exchange fluid liquid channel 1412 towards a row of heat exchange fluid channels 1112, so that heat exchange fluid flowing out of the row of heat exchange fluid channels 1112 can be led into the heat exchange fluid outlet 22 after being converged.

Correspondingly, referring to fig. 8 and 9, the second flow guiding portion 15 has at least two second flow guiding channel groups 151 sequentially arranged along the first direction 12, and each second flow guiding channel group 151 corresponds to each row of micro channels one by one; the second diversion channel group 151 includes a refrigerant liquid outlet channel 1511 and a heat exchange fluid liquid inlet channel 1512 arranged along the first direction 12, and the refrigerant liquid outlet channel 1511 and the heat exchange fluid liquid inlet channel 1512 all extend along the second direction 13; the refrigerant liquid outlet channel 1511 has openings toward the refrigerant outlet 24 and the one row of refrigerant channels 1111 to communicate the refrigerant outlet 24 and the one row of refrigerant channels 1111; the heat exchange fluid feed channel 1512 has an opening towards the heat exchange fluid inlet 23 and the row of heat exchange fluid channels 1112 to communicate the heat exchange fluid inlet 23 with the row of heat exchange fluid channels 1112.

The second diversion channel group 151 mainly guides the heat exchange fluid entering from the heat exchange fluid inlet 23 into the heat exchange fluid channel 1112 through the heat exchange fluid inlet channel 1512, and guides the refrigerant in the refrigerant channel 1111 to the refrigerant outlet 24 through the refrigerant outlet channel 1511 for discharging. Wherein, the heat exchange fluid inlet channel 1512 and the refrigerant outlet channel 1511 are isolated from each other, and form independent fluid channels for the heat exchange fluid and the refrigerant to circulate respectively.

Optionally, in an embodiment, the second guiding portion 15 includes a plurality of second guiding rows arranged at intervals along the first direction 12 and parallel to each other, and a second folding portion is disposed between every two adjacent second guiding rows, and the plurality of second guiding rows and the second folding portion form a reciprocating folding structure. The adjacent two second deflector rows and the second return adjacent to the heat exchange fluid inlet 23 form a refrigerant liquid outlet channel 1511, and the adjacent two second deflector rows and the second return adjacent to the refrigerant outlet 24 form a heat exchange fluid liquid inlet channel 1512.

In another embodiment of the present application, referring to fig. 2, a side of the refrigerant liquid inlet channel 1411 away from the refrigerant inlet 21 has an arc; the side of the heat exchange fluid outlet channel 1412 remote from the heat exchange fluid outlet 22 has an arc.

Specifically, in this embodiment, referring to fig. 2, the first diversion portion 14 is formed with a refrigerant liquid inlet arc surface 144 on a side of the refrigerant liquid inlet channel 1411 away from the refrigerant inlet 21, that is, a side of the first inflection portion 143 facing the refrigerant inlet 21 is formed with the refrigerant liquid inlet arc surface 144, which is beneficial to smooth circulation of the refrigerant after entering the refrigerant liquid inlet channel 1411, and similarly, the first diversion portion 14 is formed with a heat exchange fluid liquid outlet arc surface at the end of the heat exchange fluid liquid outlet channel 1412, which is beneficial to smooth outflow of the heat exchange fluid.

In another embodiment, the side of the heat exchange fluid inlet channel 1512 away from the heat exchange fluid inlet 23 has an arc, that is, the second guiding portion 15 forms a heat exchange fluid inlet arc surface on the side of the heat exchange fluid inlet channel 1512 away from the heat exchange fluid inlet 23; the side of the refrigerant liquid outlet channel 1511 away from the refrigerant outlet 24 has an arc, that is, the second guiding portion 15 is formed with a refrigerant liquid outlet arc surface 152 on the side of the refrigerant liquid outlet channel 1511 away from the refrigerant outlet 24.

In another embodiment of the present application, referring to fig. 1 and 2, the first flow guiding portion 14 and the second flow guiding portion 15 are respectively connected to two ends of the grille portion 11 along the length direction, and the refrigerant channel 1111 and the heat exchange fluid channel 1112 extend along the length direction and penetrate through the grille portion 11. In the present embodiment, the first flow guiding portion 14 and the second flow guiding portion 15 are disposed at opposite ends of the grid portion 11 in the longitudinal direction. Correspondingly, the interface 20 may include a refrigerant inlet joint formed with a refrigerant inlet 21, a refrigerant outlet joint formed with a refrigerant outlet 24, a heat exchange fluid inlet joint formed with a heat exchange fluid inlet 23, and a heat exchange fluid outlet joint formed with a heat exchange fluid outlet 22, wherein the refrigerant inlet joint and the heat exchange fluid outlet joint are respectively connected to opposite sides of the first diversion portion 14, and the refrigerant outlet joint and the heat exchange fluid inlet joint are respectively connected to opposite sides of the second diversion portion 15.

Specifically, in the present embodiment, as shown in fig. 2 to 5, the refrigerant enters the first guiding portion 14 through the refrigerant inlet connector, the refrigerant is guided by the first guiding portion 14 to enter the plurality of refrigerant channels 1111, flows toward the second guiding portion 15 along the length direction of the grille portion 11, is guided by the second guiding portion 15 to enter the refrigerant outlet 24, and is finally discharged from the refrigerant outlet 24. The heat exchange fluid enters the second diversion part 15 from the heat exchange fluid inlet 23 of the heat exchange fluid inlet connector, the heat exchange fluid is guided by the second diversion part 15 to enter the plurality of heat exchange fluid channels 1112, flows to the first diversion part 14 along the length direction of the grille part 11, enters the heat exchange fluid outlet 22 after being guided by the first diversion part 14, and is finally discharged from the heat exchange fluid outlet 22.

The first flow guiding part 14 and the second flow guiding part 15 are respectively connected to two ends of the grille part 11 in the length direction, so that the whole structure of the micro-channel heat exchange device is simplified, the micro-channel heat exchange device of the embodiment is convenient to be connected with other structural parts of the heat exchange equipment, the replacement of each part is convenient, and the whole maintenance and the repair of the micro-channel heat exchange device are also convenient.

In another embodiment of the present application, referring to fig. 3, 4, 6, 8 and 9, cross sections of the grille part 11, the first guiding part 14 and the second guiding part 15 are polygonal, and cross sectional profiles of the grille part 11, the first guiding part 14 and the second guiding part 15 are adapted. Wherein, the adaptation means that the cross sections of the grid part 11, the first diversion part 14 and the second diversion part 15 are all of the same polygon.

Specifically, in the present embodiment, the cross sections of the grill portion 11, the first air guiding portion 14, and the second air guiding portion 15 are cross sections perpendicular to the length direction of the grill portion 11, and the polygon may be pentagon, hexagon, or the like. As an example, the cross sections of the grill part 11, the first guide part 14, and the second guide part 15 are all regular hexagons. The refrigerant inlet 21 is opposite to two edges adjacent to the first guiding portion 14, the heat exchange fluid outlet 22 is opposite to two edges adjacent to the first guiding portion 14, and the refrigerant inlet 21 and the heat exchange fluid outlet 22 are opposite. The polygonal configuration may facilitate the introduction of different fluids into different microchannels by the interface 20. The adaptation of the cross-sectional profiles of the grille part 11, the first deflector part 14 and the second deflector part 15 may facilitate a good separation of the refrigerant and the heat exchange fluid, so that the refrigerant and the heat exchange fluid can be smoothly guided into the refrigerant channel 1111 and the heat exchange fluid channel 1112, respectively.

In another embodiment of the present application, referring to fig. 10 to 13, the first flow guiding portion 33 and the second flow guiding portion 34 are connected to the same end of the grid portion 11 along the length direction, and are sequentially arranged along the first direction 12. That is, in the present embodiment, referring to fig. 10 and 11, the interface member 40 is located at one end of the grille part 11 in the longitudinal direction, and is provided for inflow and outflow of the refrigerant and inflow and outflow of the heat exchange fluid.

In the embodiment, referring to fig. 12 and 15, the refrigerant channel 31 includes a first refrigerant branch 311 and a second refrigerant branch 312 that extend along the length direction of the grille portion 11, where the first refrigerant branch 311 corresponds to the first flow guiding portion 33, that is, the first refrigerant branch 311 is located in the orthographic projection range of the first flow guiding portion 33; the second refrigerant branch 312 corresponds to the second guiding portion 34, that is, the second refrigerant branch 312 is located in the orthographic projection range of the second guiding portion 34; one end of the first refrigerant branch 311, which is far from the first guiding portion 33, and one end of the second refrigerant branch 312, which is far from the second guiding portion 34, are mutually communicated.

The first refrigerant branch 311 and the second refrigerant branch 312 may be integrally formed U-shaped pipes, and two branches of the U-shaped pipes are respectively the first refrigerant branch 311 and the second refrigerant branch 312; of course, the first refrigerant branch 311 and the second refrigerant branch 312 may be independent refrigerant branches, and are mutually communicated through a communication structure.

That is, in the present embodiment, as shown in fig. 10 to 17, the refrigerant is guided by the first guide portion 33 through the refrigerant inlet 41 to enter the first refrigerant branch 311, flows through the first refrigerant branch 311 in the longitudinal direction of the grille portion 11, flows into the second refrigerant branch 312 at the end of the first refrigerant branch 311 (i.e., the end far from the first guide portion 33), flows through the second refrigerant branch 312 in the longitudinal direction of the grille portion 11, and is discharged through the refrigerant outlet 44 via the second guide portion 34.

In this embodiment, referring to fig. 13 and 17, the heat exchange fluid channel 32 includes a first heat exchange fluid branch 321 and a second heat exchange fluid branch 322 that extend along a length direction, where the first heat exchange fluid branch 321 corresponds to the first guiding portion 33, the second heat exchange fluid branch 322 corresponds to the second guiding portion 34, and one end of the first heat exchange fluid branch 321 away from the first guiding portion 33 and one end of the second heat exchange fluid branch 322 away from the second guiding portion 34 are mutually communicated. Similarly, the first heat exchange fluid branch 321 and the second heat exchange fluid branch 322 may be integrally formed U-shaped pipes, and two branches of the U-shaped pipes are the first heat exchange fluid branch 321 and the second heat exchange fluid branch 322 respectively; of course, the first heat exchange fluid branch 321 and the second heat exchange fluid branch 322 may be independent heat exchange fluid branches, and are mutually communicated through a communication structure.

That is, in the present embodiment, referring to fig. 13 to 17, the heat exchange fluid is guided by the second diversion portion 34 through the heat exchange fluid inlet 43, flows through the second heat exchange fluid branch 322 along the length direction of the grille portion 11, flows into the first heat exchange fluid branch 321 at the end of the second heat exchange fluid branch 322 (i.e., the end far from the second diversion portion 34), flows through the first heat exchange fluid branch 321 along the length direction of the grille portion 11, and is discharged through the first diversion portion 33 and the heat exchange fluid outlet 42.

In this embodiment, the first flow guiding portion 33 and the second flow guiding portion 34 are disposed at the same end of the grille portion 11 in the length direction, and the first refrigerant branch 311 and the second refrigerant branch 312, and the first heat exchange fluid branch 321 and the second heat exchange fluid branch 322, which are mutually communicated, are adopted, so that the lengths of the refrigerant channel 31 and the heat exchange fluid channel 32 are both prolonged, and the flow time of the fluid in the corresponding channels is prolonged, that is, the heat exchange time is prolonged, which is beneficial to further improving the heat exchange effect, and the heat exchange efficiency is better.

In another embodiment of the present application, referring to fig. 13 and 14, the first flow guiding portion 33 has at least two first flow guiding channel groups 331 sequentially arranged along the first direction 12, and each first flow guiding channel group 331 corresponds to each row of micro channels one by one; the first diversion channel group 331 includes a refrigerant liquid inlet channel 3311 and a heat exchange fluid liquid outlet channel 3312 arranged along a first direction 12, and the refrigerant liquid inlet channel 3311 and the heat exchange fluid liquid outlet channel 3312 extend along a second direction 13; the refrigerant liquid inlet channel 3311 has an opening facing the refrigerant inlet 41 and the row of first refrigerant branches 311 to communicate the refrigerant inlet 41 and the row of first refrigerant branches 311; the heat exchange fluid outlet channel 3312 has an opening toward the heat exchange fluid outlet 42 and the row of first heat exchange fluid branches 321 to communicate the heat exchange fluid outlet 42 with the row of first heat exchange fluid branches 321.

Specifically, in the present embodiment, the first diversion channel group 331 mainly guides the refrigerant entering from the refrigerant inlet 41 into the first refrigerant branch 311 through the refrigerant liquid inlet channel 3311, and simultaneously guides the heat exchange fluid in the second heat exchange fluid branch 322 to the heat exchange fluid outlet 42 through the heat exchange fluid liquid outlet channel 3312 for discharging. The refrigerant liquid inlet channel 3311 and the heat exchange fluid liquid outlet channel 3312 are isolated from each other, and respectively form independent fluid channels for the refrigerant and the heat exchange fluid to circulate.

Correspondingly, referring to fig. 13 and 15, the second flow guiding portion 34 has at least two second flow guiding channel groups 341 sequentially arranged along the first direction 12, and each second flow guiding channel group 341 corresponds to each row of micro-channels one by one; the second diversion channel group 341 includes a refrigerant liquid outlet channel 3411 and a heat exchange fluid liquid inlet channel 3412 arranged along the first direction 12, and the refrigerant liquid outlet channel 3411 and the heat exchange fluid liquid inlet channel 3412 extend along the second direction 13; the refrigerant liquid outlet channel 3411 has an opening facing the refrigerant outlet 44 and the row of second refrigerant branches 312 to communicate the refrigerant outlet 44 with the row of second refrigerant branches 312; the heat exchange fluid feed channel 3412 has an opening towards the heat exchange fluid inlet 43 and the row of second heat exchange fluid branches 322 to communicate the heat exchange fluid inlet 43 with the row of second heat exchange fluid branches 322.

The second diversion channel group 341 mainly guides the heat exchange fluid entering from the heat exchange fluid inlet 43 into the second heat exchange fluid branch 322 through the heat exchange fluid inlet channel 3412, and guides the refrigerant of the second refrigerant branch 312 to the refrigerant outlet 44 through the refrigerant outlet channel 3411 for discharging. The heat exchange fluid inlet channel 3412 and the refrigerant outlet channel 3411 are isolated from each other, and form independent fluid channels for the heat exchange fluid and the refrigerant to circulate respectively. The first flow guiding portion 33 and the second flow guiding portion 34 may be isolated from each other by an intermediate plate, and the first flow guiding portion 33 and the second flow guiding portion 34 are each a reciprocating and reverse-folded structure formed by a plurality of flow guiding row plates and reverse-folded portions, and the specific structure thereof may be described with reference to the structures of the first flow guiding portion 14 and the second flow guiding portion 15 in the above embodiments.

In another embodiment of the present application, referring to fig. 10 to 16, the heat exchange member 30 further includes a guiding portion 50, and the guiding portion 50 is connected to the other end of the grille portion 11 opposite to the first guiding portion 33 and the second guiding portion 34 in the length direction; referring to fig. 16, the guide portion 50 has a first chamber 51 and a second chamber 52 isolated from each other, the first refrigerant branch 311 communicates with the second refrigerant branch 312 through the first chamber 51, and the first heat exchange fluid branch 321 communicates with the second heat exchange fluid branch 322 through the second chamber 52.

Specifically, in the present embodiment, one end of the grille part 11 in the length direction is connected to the interface 40, the other end is connected to the guide part 50, and in combination with fig. 16 and 17, the first chamber 51 and the second chamber 52 in the guide part 50 are isolated from each other, and after the refrigerant enters the first chamber 51 through the first refrigerant branch 311, the refrigerant flows into the second refrigerant branch 312 in the first chamber 51 under the action of the driving force; similarly, after the heat exchange fluid enters the second chamber 52 through the second heat exchange fluid branch 322, the heat exchange fluid flows into the first heat exchange fluid branch 321 in the second chamber 52 under the action of the driving force.

By providing the guide portion 50, maintenance and repair of the refrigerant passage 31 and the heat exchange fluid passage 32 can be facilitated while the refrigerant passage 31 and the heat exchange fluid passage 32 are ensured to be prolonged, for example, cleaning and maintenance can be conveniently performed by detaching the guide portion 50 in the case where the refrigerant passage 31 and the heat exchange fluid passage 32 are blocked.

In another embodiment of the present application, referring to fig. 16 and 17, the guiding portion 50 includes a guiding core 53, a first side wall 511 and a second side wall 521, the first side wall 511 and the second side wall 521 are opposite to each other along the second direction 13, the guiding core 53 is located between the first side wall 511 and the second side wall 521, the guiding core 53 and the first side wall 511 define a first chamber 51, and the guiding core 53 is used for communicating the first refrigerant branch 311, the first chamber 51 and the second refrigerant branch 312; the guiding core 53 and the second side wall 521 define a second chamber 52, the guiding core 53 further being adapted to communicate the first heat exchange fluid branch 321, the second chamber 52 and the second heat exchange fluid branch 322.

In another embodiment of the present application, referring to fig. 16, the guiding core 53 is formed with at least two first drainage channel groups 531 sequentially arranged along the first direction 12, and each first drainage channel group 531 corresponds to each row of micro channels one by one; at least two first drainage channel groups 531 and first diversion portions 33 are disposed opposite to each other in the length direction of the grille portion, and the first refrigerant branch 311 and the first heat exchange fluid branch 321 are located between the first diversion portions 33 and the first drainage channel groups 531.

Referring to fig. 16, the first drainage channel group 531 includes a refrigerant extraction channel 5311 and a heat exchange fluid introduction channel 5312 arranged along a first direction 12, the refrigerant extraction channel 5311 and the heat exchange fluid introduction channel 5312 each extend along a second direction 13, and an opening of the refrigerant extraction channel 5311 faces the first refrigerant branch 311 and the first chamber 51 to communicate a row of the first refrigerant branch 311 and the first chamber 51; the heat exchange fluid introduction passage 5312 opens toward the first heat exchange fluid branch 321 and the second chamber 52 to communicate the second chamber 52 with the row of first heat exchange fluid branches 321.

Referring to fig. 16, the guiding core 53 is further formed with at least two second drainage channel groups 532 sequentially arranged along the first direction 12, and each second drainage channel group 532 corresponds to each row of micro channels one by one; at least two second drainage channel groups 53 and second diversion portions 34 are disposed opposite to each other in the length direction of the grille portion, and the second refrigerant branch 312 and the second heat exchange fluid branch 322 are both located between the second drainage channel groups 532 and the second diversion portions 34.

The second drainage channel group 532 includes a heat exchange fluid extraction channel 5321 and a refrigerant introduction channel 5322 arranged along the first direction 12, the heat exchange fluid extraction channel 5321 and the refrigerant introduction channel 5322 each extending along the second direction 13, the opening of the heat exchange fluid extraction channel 5321 facing the second heat exchange fluid branch 322 and the second chamber 52 to communicate the second chamber 52 with a row of second heat exchange fluid branches 322; the opening of the refrigerant introduction passage 5322 faces the second refrigerant branch 312 and the first chamber 51 to communicate the first chamber 51 with a row of second refrigerant branches 312.

Specifically, the structure of the guide core 53 in the present embodiment is similar to the structures of the first flow guiding portion 14 and the second flow guiding portion 15 of the above-described embodiment.

Optionally, in an embodiment, the guiding core 53 includes a plurality of drainage plates arranged at intervals along the first direction 12 and parallel to each other, and a connection portion is disposed between every two adjacent drainage plates, where the plurality of drainage plates and the connection portion form a reciprocating and reverse structure, and the refrigerant and the heat exchange fluid can be respectively guided into the respective channels by using the reciprocating and reverse guiding core 53.

The first side wall 511 and the second side wall 521 are primarily used to form a chamber structure for fluid communication. Optionally, the first side wall 511 and the second side wall 521 are arc structures disposed opposite to each other, and by the design of the arc structures, smooth fluid circulation in the corresponding chambers can be ensured.

The structures of the first and second drainage channel groups 531 and 532 can be understood with reference to the structures of the first and second drainage channel groups 141 and 151 described above. The first drainage channel group 531 and the second drainage channel group 532 can realize the leading in and leading out of the refrigerant and the leading in and leading out of the heat exchange fluid in the same guiding part 50, so that the refrigerant and the heat exchange fluid respectively enter the corresponding micro-channels from the corresponding inlets of the interface piece 40, are respectively guided by the guiding part 50, finally are discharged from the corresponding outlets of the interface piece 40, and finally the heat exchange process of the refrigerant and the heat exchange fluid is completed.

Illustratively, the refrigerant is guided by the first guiding portion 33 through the refrigerant inlet 41 to enter the first refrigerant branch 311, flows through the first refrigerant branch 311 along the length direction of the grille portion 11, flows into the second refrigerant branch 312 through the refrigerant outlet channel 5311, the first chamber 51 and the refrigerant introducing channel 5322, flows through the second refrigerant branch 312 along the length direction of the grille portion 11, and is discharged through the refrigerant outlet 44 via the second guiding portion 34.

The heat exchange fluid is guided by the second diversion portion 34 through the heat exchange fluid inlet 43 and enters the second heat exchange fluid branch 322, flows through the second heat exchange fluid branch 322 along the length direction of the grille portion 11, flows into the first heat exchange fluid branch 321 after passing through the heat exchange fluid outlet channel 5321, the second chamber 52 and the heat exchange fluid introduction channel 5312, flows through the first heat exchange fluid branch 321 along the length direction of the grille portion 11, and is discharged through the heat exchange fluid outlet 42 via the first diversion portion 33.

In another embodiment of the present application, referring to fig. 7, the cross sections of the refrigerant channel 1111 and the heat exchange fluid channel 1112 are equilateral triangles, and the side length of the equilateral triangle is 0.5 mm-2 mm. Illustratively, the sides of the equilateral triangle can be 0.5mm, 0.7mm, 1.4mm, 1.8mm, 2mm, or the like.

Specifically, the larger the heat exchange surface/volume ratio is, the larger the heat exchange area is under the same volume, the better the heat exchange effect is, and through actual measurement, the heat exchange surface/volume ratio of the equilateral triangle is the largest. The specific measurement process is referred to as follows (the wall thicknesses of the refrigerant channel 1111 and the heat exchange fluid channel 1112 are ignored or assumed to be very small in the measurement process):

(1) The cross section is round or hexagonal:

area:

side length: a, a

Effective exchange side length: 3a

Area/volume= (area×high)/(effective exchange side×high) =effective exchange side/area= 1.1547/a

(2) The cross section is quadrilateral:

side length: a, a

Area: s=a ²

Effective exchange side length: 4a

Effective exchange side length/area=4/a

(3) The cross section is an equilateral triangle:

side length: a, a

Area:

effective exchange side length: 3a

Effective exchange side length/area= 6.928/a

(4) The cross section is an equilateral right triangle:

side length: a, a

Area: s=a ² /2

Effective exchange side length: 2a+1.414a

Effective exchange side length/area= 6.828/a

(4) The cross section is a right triangle with unequal sides:

side length: a. b

Area: s=a×b/2

Effective exchange side length:

when the cross sections of the refrigerant channel 1111 and the heat exchange fluid channel 1112 are equilateral triangles, the heat exchange fluid channel 1112 and two adjacent refrigerant channels 1111 in the second direction are co-walled, so as to realize sufficient heat exchange; the heat exchange fluid channel 1112 is co-walled with one refrigerant channel 1111 adjacent in the first direction, and the heat exchange fluid channel 1112 is co-peaked with the other refrigerant channel 1111 adjacent in the first direction, thereby further improving heat exchange efficiency.

In another embodiment of the present application, the inner walls of two adjacent refrigerant channels 1111 are in arc transition, so as to ensure smooth circulation of fluid in the refrigerant channels 1111. The inner walls of two adjacent channels in the heat exchange fluid channel 1112 can also be in arc transition, so that smooth circulation of fluid in the heat exchange fluid channel 1112 is ensured.

In another embodiment of the present application, referring to fig. 2, the microchannel heat exchange device further includes an outer tube 60 and an insulation layer (not shown in the drawings), the grille part 11 is disposed in the outer tube 60, and the insulation layer is disposed between the grille part 11 and the outer tube 60.

Specifically, in this embodiment, a gap exists between the outer tube 60 and the grille part 11, and an insulation layer is filled in the gap, and the material of the insulation layer can be selected according to actual needs, for example, insulation cotton is selected. The heat exchange between the micro-channel heat exchange device and the external environment can be avoided or reduced by arranging the heat preservation layer, so that the integral heat exchange efficiency of the heat exchange device is improved.

In another embodiment of the present application, referring to fig. 7, the grille part 11 includes a grille core 111 and an outer casing 112, the outer casing 112 is disposed around the grille core 111, a micro-channel is formed in the grille core 111, and a micro-channel is formed between the outer casing 112 and the grille core 111; the wall thickness of the grill core 111 (i.e., the wall thickness of the inner wall 1113) is less than the wall thickness of the outer housing 112 (i.e., the wall thickness of the outer wall 1121).

Specifically, in one embodiment, the wall thickness of the grill core 111 (i.e., the wall thickness of the inner wall 1113) is 0.1mm to 0.17mm, wherein greater than 0.1mm meets the requirements of structural strength and processing limits, less than 0.17mm ensures that the heat exchange area/volume ratio is at a greater value, and the wall thickness of the outer housing 112 (i.e., the wall thickness of the outer wall 1121) is greater than 0.2mm to meet the requirements of structural strength. Because of the interaction of thermal expansion and contraction of the fluid in the micro-channels, the structural strength of the grid core 111 is stronger than that of the outer shell 112, so that the wall thickness of the grid core 111 is smaller than that of the outer shell 112, thereby being beneficial to further improving the heat exchange efficiency.

When the wall thickness of the grill core 111 (i.e., the wall thickness of the inner wall 1113) was 0.1mm, the heat exchange surface/volume ratio of the microchannel heat exchange device was measured to be approximately 5367.79m ² /m ³ The method comprises the steps of carrying out a first treatment on the surface of the When the wall thickness of the grill core 111 (i.e., the wall thickness of the inner wall 1113) was 0.17mm, the heat exchange surface/volume ratio of the microchannel heat exchange device was measured to be approximately 4355.95m ² /m ³ . As can be seen from the measurement and calculation results, the microchannel heat exchanger of the application belongs to a microscale heat exchanger (generally, the heat exchange surface/volume ratio is more than 5000m ² /m ³ The heat exchanger is called as a microscale heat exchanger), and is an ultra-compact heat exchanger with wide application prospect.

Referring to fig. 1 and 18, the present application further provides a heat exchange apparatus, which includes a refrigerant circuit 71, a heat exchange fluid circuit 72, and a micro-channel heat exchange device according to any of the above embodiments, wherein the micro-channel heat exchange device is in communication with the refrigerant circuit 71 and the heat exchange fluid circuit 72.

The heat exchange device of this embodiment uses the microchannel heat exchange device as the evaporator and/or the condenser of the heat exchange device, so that the microchannel heat exchange device is connected with the refrigerant circuit 71 for inflow and outflow of the refrigerant, and the microchannel heat exchange device is also connected with the heat exchange fluid circuit 72 for inflow and outflow of the heat exchange fluid such as water supply liquid. Wherein the refrigerant circuit 71 may include a compressor 711 and the heat exchange fluid circuit 72 may include a water pump 721 and a fan coil 722.

As an embodiment, the micro-channel heat exchange device is used as an evaporator of the heat exchange device, and the refrigerant inlet and the refrigerant outlet of the micro-channel heat exchange device are connected with the compressor 711 of the refrigerant loop 71 for inflow and outflow of the refrigerant; the heat exchange fluid inlet and the heat exchange fluid outlet of the micro-channel heat exchange device are connected with the water pump 721 of the heat exchange fluid loop 72 so as to feed water into and out of the water; the refrigerant and the water liquid realize sufficient heat exchange in the micro-channel heat exchange device so as to absorb heat in the water liquid and change the water liquid from high temperature to low temperature.

As another embodiment, the micro-channel heat exchange device is used as a condenser of the heat exchange device, and the refrigerant inlet and the refrigerant outlet of the micro-channel heat exchange device are connected with the compressor 711 of the refrigerant loop 71 for inflow and outflow of the refrigerant; the heat exchange fluid inlet and the heat exchange fluid outlet of the micro-channel heat exchange device are connected with the water pump 721 of the heat exchange fluid loop 72 so as to feed water into and out of the water; the refrigerant and the water liquid realize sufficient heat exchange in the micro-channel heat exchange device, so that the water liquid is changed from low temperature to high temperature.

The heat exchange device may be an air conditioning device, that is, the air conditioning device may include a main body and at least one air outlet device, where the main body is provided with a refrigerant loop 71 and the microchannel heat exchange device of the foregoing embodiment, the foregoing microchannel heat exchange device and the air outlet device establish a water-liquid circulation loop, the air outlet device has a fan coil 722, the low-temperature water flowing out of the microchannel heat exchange device flows through the fan coil 722, so that the air outlet device sends out cold air, and/or the high-temperature water flowing out of the microchannel heat exchange device flows through the fan coil 722, so that the air outlet device sends out hot air.

When the air conditioning device is a split device, the application scenario may be outdoor, for example, the main unit of the air conditioning device is placed in an outdoor site, and the air outlet device may be placed in a tent or a caravan to supply cool air or warm air to a user. Similarly, the micro-channel heat exchange device has higher heat exchange efficiency, so that the air outlet device with smaller volume can realize better refrigeration or heating effect.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. A microchannel heat exchange device comprising:

the heat exchange piece comprises a grid part, wherein the grid part is provided with at least two rows of micro-channels which are sequentially arranged along a first direction, each row of micro-channels comprises a plurality of refrigerant channels and a plurality of heat exchange fluid channels, the plurality of refrigerant channels are arranged at intervals along a second direction, one heat exchange fluid channel is arranged between two adjacent refrigerant channels, and a common wall is arranged between the adjacent refrigerant channels and the heat exchange fluid channels in the same row of micro-channels; the refrigerant channels in one row of the micro channels and the heat exchange fluid channels in the other adjacent row of the micro channels are sequentially arranged along the first direction, and the adjacent refrigerant channels and the heat exchange fluid channels in the two adjacent rows of the micro channels which are adjacent in the first direction have a common wall, wherein the first direction and the second direction are mutually perpendicular; and

2. The microchannel heat exchange device of claim 1 wherein the heat exchange member further comprises:

the first diversion part is arranged on the grid part, the refrigerant inlet and the heat exchange fluid outlet are respectively positioned on two opposite sides of the first diversion part, and the first diversion part is used for communicating the refrigerant inlet with a plurality of refrigerant channels and also used for communicating the heat exchange fluid outlet with a plurality of heat exchange fluid channels;

the second diversion part is arranged on the grid part, the refrigerant outlet and the heat exchange fluid inlet are respectively positioned on two opposite sides of the second diversion part, and the second diversion part is used for communicating the refrigerant outlet with a plurality of refrigerant channels and is also used for communicating the heat exchange fluid inlet with a plurality of heat exchange fluid channels.

3. The microchannel heat exchange device according to claim 2, wherein the first flow guiding portion has at least two first flow guiding channel groups sequentially arranged along the first direction, each of the first flow guiding channel groups corresponds to each of the microchannels;

the first diversion channel group comprises a refrigerant liquid inlet channel and a heat exchange fluid liquid outlet channel which are distributed along the first direction, and the refrigerant liquid inlet channel and the heat exchange fluid liquid outlet channel extend along the second direction; the refrigerant liquid inlet channel is provided with an opening facing the refrigerant inlet and a row of refrigerant channels so as to be communicated with the refrigerant inlet and the row of refrigerant channels; the heat exchange fluid outlet channel has an opening towards the heat exchange fluid outlet and a row of the heat exchange fluid channels to communicate the heat exchange fluid outlet and a row of the heat exchange fluid channels.

4. The microchannel heat exchanger as set forth in claim 2, wherein said first flow guide portion and said second flow guide portion are connected to both ends of said grille portion in a longitudinal direction thereof, respectively, and said refrigerant passage and said heat exchange fluid passage each extend in said longitudinal direction and penetrate said grille portion.

5. The microchannel heat exchange device according to claim 2, wherein the first flow guiding portion and the second flow guiding portion are connected to the same end of the grid portion in the length direction and are sequentially arranged along the first direction;

the refrigerant channel comprises a first refrigerant branch and a second refrigerant branch which extend along the length direction, the first refrigerant branch corresponds to the first flow guiding part, the second refrigerant branch corresponds to the second flow guiding part, and one end of the first refrigerant branch, which is far away from the first flow guiding part, and one end of the second refrigerant branch, which is far away from the second flow guiding part, are mutually communicated;

the heat exchange fluid channel comprises a first heat exchange fluid branch and a second heat exchange fluid branch which extend along the length direction, the first heat exchange fluid branch corresponds to the first diversion part, the second heat exchange fluid branch corresponds to the second diversion part, and one end of the first heat exchange fluid branch, which is far away from the first diversion part, and one end of the second heat exchange fluid branch, which is far away from the second diversion part, are mutually communicated.

6. The microchannel heat exchange device of claim 5 wherein the heat exchange member further comprises a guide portion connected to the other end of the grid portion opposite to the first and second flow guiding portions in the length direction; the guide part is provided with a first chamber and a second chamber which are isolated from each other, the first refrigerant branch is communicated with the second refrigerant branch through the first chamber, and the first heat exchange fluid branch is communicated with the second heat exchange fluid branch through the second chamber.

7. The microchannel heat exchange device of claim 6 wherein the guide portion comprises a guide core, a first side wall and a second side wall, the first side wall and the second side wall being disposed opposite one another in the second direction, the guide core being located between the first side wall and the second side wall, the guide core and the first side wall defining the first chamber, the guide core being configured to communicate with the first refrigerant leg, the first chamber and the second refrigerant leg; the guide core and the second sidewall define the second chamber, the guide core further configured to communicate the first heat exchange fluid bypass, the second chamber, and the second heat exchange fluid bypass.

8. The microchannel heat exchange device as set forth in claim 7, wherein said guide core is formed with at least two first drainage channel groups sequentially arranged along said first direction, each of said first drainage channel groups being in one-to-one correspondence with each of said rows of microchannels;

the first drainage channel group comprises a refrigerant leading-out channel and a heat exchange fluid leading-in channel which are arranged along the first direction, the refrigerant leading-out channel and the heat exchange fluid leading-in channel extend along the second direction, and an opening of the refrigerant leading-out channel faces the first refrigerant branch and the first chamber so as to be communicated with a row of first refrigerant branches and the first chamber; the opening of the heat exchange fluid introduction passage is directed to the first heat exchange fluid branch and the second chamber to communicate the second chamber with a row of the first heat exchange fluid branches.

9. The microchannel heat exchange device according to any one of claims 1 to 8, wherein the cross sections of the refrigerant channels and the heat exchange fluid channels are equilateral triangles, and the side length of the equilateral triangles is 0.5mm to 2mm; and/or the number of the groups of groups,

the micro-channel heat exchange device further comprises an outer tube body and an insulating layer, the grid part is arranged in the outer tube body, and the insulating layer is arranged between the grid part and the outer tube body; and/or the number of the groups of groups,

the grid part comprises a grid core body and an outer shell body, wherein the outer shell body is arranged on the periphery of the grid core body in a surrounding mode, micro-channels are formed in the grid core body, between the outer shell body and the grid core body, and the wall thickness of the grid core body is smaller than that of the outer shell body.

10. A heat exchange apparatus comprising a refrigerant circuit, a heat exchange fluid circuit, and a microchannel heat exchange device according to any one of claims 1 to 9 in communication with the refrigerant circuit and the heat exchange fluid circuit.