An evaporator

Abstract

The application discloses an evaporator, comprising a plurality of micro-channel flat tubes, a first flow passing plate, a second flow passing plate, a first flow distributing plate assembly and a second flow distributing plate assembly; the first flow passing plate has a plurality of first flow passing grooves, the second flow passing plate has a plurality of second flow passing grooves, two ends of each micro-channel flat tube are connected to corresponding first flow passing grooves and second flow passing grooves respectively, the first flow distributing plate assembly is connected to the first flow passing plate, the first flow distributing plate assembly has a plurality of first flow distributing grooves, each first flow distributing groove is communicated with at least two first flow passing grooves, the second flow distributing plate assembly is connected to the second flow passing plate, the second flow distributing plate assembly has a plurality of second flow distributing grooves, each second flow distributing groove is communicated with at least two second flow passing grooves, and each first flow distributing groove and second flow distributing groove is communicated with each micro-channel flat tube, so that refrigerant medium entering the evaporator flows through each micro-channel flat tube and is discharged. The application realizes the communication of each micro-channel flat tube by installing the plate body assembly at two ends of each micro-channel flat tube, and does not need to be bent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange equipment, in particular to an evaporator. BACKGROUND

[0002] At present, the evaporator commonly used in frost-free air-cooled refrigerator is a structure of round tube plus fin. The advantage of round tube is that it can be bent in any direction, but the heat exchange performance of round tube is poor, and more refrigerant is filled in, usually the heat exchange of refrigerant in the middle of the tube is less, resulting in a large size of the evaporator, which reduces the use volume of the refrigerator.

[0003] Micro-channel flat tube has good heat exchange performance, and its cross-sectional height direction is generally about 2mm, and the width direction can be selected according to needs, but the micro-channel flat tube needs to be bent in the normal direction of the large plane, which limits the application in the refrigerator system. SUMMARY

[0004] The purpose of the present application is to provide an evaporator which adopts micro-channel flat tube, and installs plate assemblies at both ends of each micro-channel flat tube to realize the communication of each micro-channel flat tube, without bending the micro-channel flat tube, thereby expanding the application range of the evaporator.

[0005] The above and other objects will be achieved by the features of the independent claims. Further implementation forms are apparent from the dependent claims, the description and the figures.

[0006] In a first aspect, the present application provides an evaporator, comprising a plurality of micro-channel flat tubes, a first flow-through plate, a second flow-through plate, a first flow distribution plate assembly and a second flow distribution plate assembly; the first flow-through plate has a plurality of first flow-through grooves, the second flow-through plate has a plurality of second flow-through grooves, both ends of each micro-channel flat tube are connected to corresponding first flow-through grooves and second flow-through grooves respectively, the first flow distribution plate assembly is connected to the first flow-through plate, the first flow distribution plate assembly has a plurality of first flow distribution grooves, each first flow distribution groove communicates with at least two first flow-through grooves respectively, the second flow distribution plate assembly is connected to the second flow-through plate, the second flow distribution plate assembly has a plurality of second flow distribution grooves, each second flow distribution groove communicates with at least two second flow-through grooves respectively, and each first flow distribution groove and second flow distribution groove communicates each micro-channel flat tube, so that the refrigerant medium entering the evaporator flows through each micro-channel flat tube and then is discharged.

[0007] In the present application, the evaporator tube adopts micro-channel flat tube, which improves the heat exchange efficiency; a plurality of plate bodies are installed at both ends of each micro-channel flat tube, and the flow-through grooves and flow distribution grooves on each plate body are used to realize the communication of each micro-channel flat tube, without bending the micro-channel flat tube, which avoids the need for bending the flat tube in the normal direction of the large plane, thereby expanding the application range of the evaporator, so that the evaporator of the present application can be applied to the refrigerator system.

[0008] In one possible implementation, the first shunt plate assembly comprises a first shunt plate and a first sealing plate;

[0009] The first shunt plate is attached to the first flow-through plate;

[0010] The first shunt plate is provided with the first shunt slots;

[0011] The first sealing plate is attached to the first shunt plate on the side away from the first flow-through plate, and seals the first shunt slots.

[0012] In the above solution, the first shunt slots on the first shunt plate are through slots. When the first shunt plate is attached to the first flow-through plate, the first shunt slots on the first shunt plate are connected to at least two first flow-through slots on the first flow-through plate through the openings on the first shunt plate. When the first sealing plate is attached to the first shunt plate on the side away from the first flow-through plate, the first sealing plate seals the openings on the other side of the first shunt slots on the first shunt plate, preventing the leakage of the refrigerant medium.

[0013] Preferably, the second shunt plate assembly comprises a second shunt plate and a second sealing plate;

[0014] The second shunt plate is attached to the second flow-through plate;

[0015] The second shunt plate is provided with the second shunt slots;

[0016] The second sealing plate is attached to the second shunt plate on the side away from the second flow-through plate, and seals the second shunt slots.

[0017] In the above solution, the second shunt slots on the second shunt plate are also through slots. When the second shunt plate is attached to the second flow-through plate, the second shunt slots on the second shunt plate are connected to at least two second flow-through slots on the second flow-through plate through the openings on the second shunt plate. When the second sealing plate is attached to the second shunt plate on the side away from the second flow-through plate, the second sealing plate seals the openings on the other side of the second shunt slots on the second shunt plate, preventing the leakage of the refrigerant medium.

[0018] Preferably, the first flow-through slots are arranged in a matrix on the first flow-through plate;

[0019] The second flow-through slots are arranged in a matrix on the second flow-through plate.

[0020] In the above scheme, the plate body structure is adopted to communicate the micro-channel flat tubes, and it is easier to realize the communication of the plurality of micro-channel flat tubes arranged in multiple rows and multiple columns. The fins are connected to the micro-channel flat tubes, the refrigerant medium in the evaporator flows through the micro-channel flat tubes in sequence according to the set pipeline, is cooled by the fins, and the generated cooling air is transmitted to the set position by the external fan to realize refrigeration. The arrangement of these structures makes the evaporator of the present application have the characteristics of high heat exchange efficiency and small size.

[0021] Preferably, each of the first distribution grooves and / or each of the second distribution grooves comprises a first sub-groove and a second sub-groove, the first sub-groove extends in the vertical direction and is used to communicate two first flow grooves or two second flow grooves adjacent in the same column; the second sub-groove extends in the horizontal direction and is used to communicate two first flow grooves or two second flow grooves adjacent in the same row.

[0022] In the above scheme, because the flow grooves are arranged in a matrix shape in multiple rows and multiple columns, the distribution grooves of the present application have two forms, the first sub-groove realizes the communication of the flow grooves adjacent in the same column, and the second sub-groove realizes the communication of the flow grooves adjacent in the same row. The first sub-groove and the second sub-groove cooperate to connect the micro-channel flat tubes in series.

[0023] Preferably, the first sub-groove and the second sub-groove each comprise a flow guide groove and two connecting grooves.

[0024] The shapes of the two connecting grooves are matched with the shapes of the two corresponding first flow grooves or the two corresponding second flow grooves, respectively; and the two connecting grooves are connected to the two corresponding first flow grooves or the two corresponding second flow grooves, respectively.

[0025] The flow guide groove extends in the horizontal direction or in the vertical direction and is connected to the two connecting grooves, respectively.

[0026] Preferably, the evaporator comprises a first heating plate and a second heating plate.

[0027] The first heating plate is connected to the first sealing plate, and the second heating plate is connected to the second sealing plate.

[0028] In the above scheme, the heating plates are arranged on both sides of the evaporator for defrosting and thawing of the evaporator. In addition, the sealing plates can directly contact the refrigerant medium flowing through the micro-channel flat tubes. Therefore, arranging the heating plates on the isolation plates is conducive to transferring heat to the evaporator to heat the refrigerant medium, thereby achieving the effect of defrosting and thawing.

[0029] Preferably, the first distribution plate is provided with an inlet groove and an outlet groove;

[0030] The inlet groove and the outlet groove are respectively communicated with a first flow groove.

[0031] The first sealing plate is provided with a liquid inlet communicating with the liquid inlet groove and a liquid outlet communicating with the liquid outlet groove.

[0032] The refrigerant flows into the liquid inlet, flows through each micro-channel flat tube and flows out of the liquid outlet.

[0033] Preferably, the plurality of micro-channel flat tubes comprises a first flat tube and a second flat tube.

[0034] The flow area of the first flat tube is greater than that of the second flat tube.

[0035] The first flat tube is arranged downstream of the second flat tube.

[0036] In the prior art, the evaporator tubes of the evaporator have the same diameter specification, and the refrigerant state changes in the beginning liquid state, the gas-liquid two-phase and the complete gaseous state occupy an increased space, and the tube diameter specification is designed according to the maximum size, which wastes the heat exchange material, while in the present application, the evaporator is provided with flat tubes having different flow areas, and the flat tube with a large flow area is arranged downstream of the flat tube with a small flow area, so that when the refrigerant state changes in the beginning liquid state, it is located in the flat tube with a small flow area, and when the refrigerant state changes to the gas-liquid two-phase and the complete gaseous state, it has already flowed to the flat tube with a large flow area, which is matched with the refrigerant state, the structure design is more reasonable, the evaporator can be designed to be smaller, the material is saved, and the occupied space is small.

[0037] Preferably, the plurality of micro-channel flat tubes are arranged in multiple rows and multiple columns.

[0038] The evaporator comprises a plurality of first flat tubes and a plurality of second flat tubes.

[0039] Each first flat tube is arranged in the same row.

[0040] Each second flat tube is arranged in the same row.

[0041] The technical scheme provided by the present application can achieve the following beneficial effects:

[0042] In the present application, the evaporator tube adopts a micro-channel flat tube, which improves the heat exchange efficiency; a plurality of plate bodies are installed at both ends of each micro-channel flat tube, and the flow grooves and the distribution grooves on the plate bodies are used to communicate the micro-channel flat tubes, without the need to bend the micro-channel flat tube, which avoids the need to bend the flat tube in the normal direction of the large plane when bending, expands the application range of the evaporator, and makes the evaporator of the present application applicable to a refrigerator system. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 The overall structure of the evaporator provided by the embodiment of the present application is shown in the figure;

[0044] Figure 2 isFigure 1 Enlarged view of middle A part;

[0045] Figure 3 Exploded view of the evaporator provided for the embodiments of the present application;

[0046] Figure 4 Provided for Figure 3 Enlarged view of middle B part;

[0047] Figure 5 Provided for Figure 4 Enlarged view of middle D part;

[0048] Figure 6 Provided for Figure 3 Enlarged view of middle C part;

[0049] Reference signs: 100-evaporator;

[0050] 1-microchannel flat tube;

[0051] 11-first flat tube;

[0052] 12-second flat tube;

[0053] 2-first flow-through plate;

[0054] 21-first flow-through groove;

[0055] 3-second flow-through plate;

[0056] 31-second flow-through groove;

[0057] 4-first flow distribution plate assembly;

[0058] 41-first flow distribution plate;

[0059] 411-first flow distribution groove;

[0060] 4111-first sub-groove;

[0061] 4111a-drainage groove;

[0062] 4111b-connection groove;

[0063] 4112-second sub-groove;

[0064] 4112a-drainage groove;

[0065] 4112b-connection groove;

[0066] 412-liquid inlet groove;

[0067] 413-liquid outlet groove;

[0068] 42-first sealing plate;

[0069] 421-liquid inlet port;

[0070] 422 - liquid outlet;

[0071] 423 - liquid inlet pipe;

[0072] 424 - liquid outlet pipe;

[0073] 5 - second shunt plate assembly;

[0074] 51 - second shunt plate;

[0075] 511 - second shunt groove;

[0076] 511a - drainage groove;

[0077] 511b - connecting groove;

[0078] 52 - second sealing plate;

[0079] 6 - first heating plate;

[0080] 7 - second heating plate;

[0081] 8 - fin.

[0082] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application. DETAILED DESCRIPTION

[0083] The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0084] It should be understood that the term "and / or" as used herein merely describes associated objects in association, that is, there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship.

[0085] It should be noted that the "up", "down", "left", "right" and other directional words described in the embodiments of the application are described from the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element.

[0086] The evaporator commonly used in the frost-free air-cooled refrigerator is a structure of a round tube with fins. The round tube has the advantage that it can be bent in any direction. However, the heat exchange performance of the round tube is poor, and more refrigerant is filled in the tube. Generally, the heat exchange of the refrigerant in the middle of the tube is less, resulting in a large volume of the evaporator, and reducing the use volume of the refrigerator.

[0087] The micro-channel flat tube has good heat exchange performance. The height direction of the cross section thereof is generally about 2 mm, and the width direction thereof can be selected according to needs. However, the micro-channel flat tube needs to be bent in the normal direction of a large plane, which limits the application thereof in the refrigerator system.

[0088] Therefore, the present application provides an evaporator which can solve the above technical problems.

[0089] Figure 1 A perspective structural diagram of the evaporator provided by an embodiment of the present application is shown in Figure 3 A perspective structural diagram of the evaporator provided by an embodiment of the present application is shown in Figure 1 An exploded view of the evaporator provided by an embodiment of the present application is shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 The evaporator 100 comprises a plurality of micro-channel flat tubes 1, a first flow-through plate 2, a second flow-through plate 3, a first flow distribution plate assembly 4 and a second flow distribution plate assembly 5. The first flow-through plate 2 has a plurality of first flow-through grooves 21. The second flow-through plate 3 has a plurality of second flow-through grooves 31. Two ends of each micro-channel flat tube 1 are connected to corresponding first flow-through grooves 21 and second flow-through grooves 31 respectively. The first flow distribution plate assembly 4 is connected to the first flow-through plate 2. The first flow distribution plate assembly 4 has a plurality of first flow distribution grooves 411. Each first flow distribution groove 411 is in communication with at least two first flow-through grooves 21 respectively. The second flow distribution plate assembly 5 is connected to the second flow-through plate 3. The second flow distribution plate assembly 5 has a plurality of second flow distribution grooves 511. Each second flow distribution groove 511 is in communication with at least two second flow-through grooves 31 respectively. Each first flow distribution groove 411 and second flow distribution groove 511 is in communication with each micro-channel flat tube 1, so that the refrigerant medium entering the evaporator flows through each micro-channel flat tube 1 and then is discharged.

[0090] In the present application, the evaporator tube adopts the micro-channel flat tube 1. The micro-channel flat tube 1 can be an aluminum tube and has a plurality of refrigerant flow channels, thereby improving the heat exchange efficiency. A plurality of plate bodies are installed at two ends of each micro-channel flat tube 1 in the present application. The plate bodies are in communication with each micro-channel flat tube through flow-through grooves and flow distribution grooves on the plate bodies, without the need to bend the micro-channel flat tube 1. The micro-channel flat tube is not required to be bent in the normal direction of a large plane, thereby expanding the application range of the evaporator and making the evaporator of the present application applicable to the refrigerator system.

[0091] Specifically, the plate bodies are installed at two ends of each micro-channel flat tube 1 in the present application. The plate bodies are in communication with each micro-channel flat tube through flow-through grooves and flow distribution grooves on the plate bodies, without the need to bend the micro-channel flat tube 1. The micro-channel flat tube is not required to be bent in the normal direction of a large plane, thereby expanding the application range of the evaporator and making the evaporator of the present application applicable to the refrigerator system. Figure 3As shown, each micro-channel flat tube 1 is a long strip-shaped flat straight tube without bending structure on both sides, and the end of each micro-channel flat tube is covered by a plurality of plate bodies to realize the communication of each micro-channel flat tube 1. The structure design is simple, the process requirement is low, any length can be manufactured according to the demand, the application field of the evaporator is expanded, and the evaporator can be applied to a refrigerator system.

[0092] Referring to Figure 1 , Figure 3 , Figure 4 In a possible implementation, the first distribution plate assembly 4 includes a first distribution plate 41 and a first sealing plate 42. The first distribution plate 41 is connected to the first flow-through plate 2 in a fit-on manner. The first distribution plate 41 is provided with a first distribution groove 411. The first sealing plate 42 is connected to the first distribution plate 41 in a fit-on manner and away from the first flow-through plate 2 to close the first distribution groove 411.

[0093] In this implementation, the first distribution groove 411 on the first distribution plate 41 is a through groove. When the first distribution plate 41 is connected to the first flow-through plate 2 in a fit-on manner, the first distribution groove 411 on the first distribution plate 41 is connected to the at least two first flow-through grooves 21 on the first flow-through plate 2 through the opening on one side of the first distribution plate 41. When the first sealing plate 42 is connected to the first distribution plate 41 in a fit-on manner and away from the first flow-through plate 2, the first sealing plate 42 closes the opening on the other side of the first distribution groove 411 on the first distribution plate 41 to prevent the leakage of the refrigerant medium. In this implementation, the fit-on connection structure between the plurality of plate bodies is adopted at the end of each micro-channel flat tube 1 to form a distribution channel for communicating the micro-channel flat tubes 1. The structure is ingenious, the plate bodies are fit on each other, the connection structure is stable, and no space is occupied, which is beneficial to designing a smaller evaporator.

[0094] Referring to Figure 1 , Figure 3 and Figure 6 In a possible implementation, the second distribution plate assembly 5 includes a second distribution plate 51 and a second sealing plate 52. The second distribution plate 51 is connected to the second flow-through plate 3 in a fit-on manner. The second distribution plate 51 is provided with a second distribution groove 511. The second sealing plate 52 is connected to the second distribution plate 51 in a fit-on manner and away from the second flow-through plate 3 to close the second distribution groove 511.

[0095] In this embodiment, the second distribution grooves 511 on the second distribution plate 51 are also through grooves, when the second distribution plate 51 is attached to the second flow-through plate 3, the second distribution grooves 511 on the second distribution plate 51 are communicated with the at least two second flow-through grooves 31 on the second flow-through plate 3 through the opening on the side of the second flow-through plate 3, and when the second sealing plate 52 is attached to the side of the second distribution plate 51 away from the second flow-through plate 3, the second sealing plate 52 blocks the opening on the other side of the second distribution grooves 511 on the second distribution plate 51, preventing the leakage of the refrigerant medium.

[0096] It can be understood that the connection between the plates in the present application is sealed, and the refrigerant medium cannot leak between the two adjacent plates. It should be noted that any structure or method that can achieve the sealed connection of the two adjacent plates in the present application is within the scope of the present application. For example, the two adjacent plates can be attached and connected by a sealant.

[0097] In a possible embodiment, as shown in Figure 4 and Figure 6 , the first flow-through grooves 21 are arranged in a matrix on the first flow-through plate 2, and the second flow-through grooves 31 are arranged in a matrix on the second flow-through plate 3.

[0098] In this embodiment, because the present application uses a plate assembly to connect the micro-channel flat tubes 1, the plate has a certain expansion area, and can connect multiple micro-channel flat tubes 1 arranged in multiple rows and multiple columns. As shown in Figure 1 , the fins 8 are connected to each micro-channel flat tube 1, the refrigerant medium in the evaporator flows through each micro-channel flat tube 1 in sequence according to the set pipeline, is cooled by the fins 8, and the generated cooling air is transmitted to the set position by the external fan to achieve refrigeration. These structures make the evaporator of the present application have the characteristics of high heat exchange efficiency and small size.

[0099] As shown in Figures 4 to 6 , in a possible embodiment, each first distribution groove 411 includes a first sub-groove 4111 and a second sub-groove 4112, the shapes of the first sub-groove 4111 and the second sub-groove 4112 are different, the first sub-groove 4111 extends in the vertical direction and is used to connect two first flow-through grooves 21 adjacent in the same column; the second sub-groove 4112 extends in the horizontal direction and is used to connect two first flow-through grooves 21 adjacent in the same row, so that the refrigerant medium in the evaporator can flow through each micro-channel flat tube 1 in each row in sequence.

[0100] Similarly, each second distribution groove 511 can include a first sub-groove and a second sub-groove, the first sub-groove extends in the vertical direction and is used to connect two second flow-through grooves adjacent in the same column, and the second sub-groove extends in the horizontal direction and is used to connect two second flow-through grooves 31 adjacent in the same row.

[0101] In this embodiment, as the flow-through grooves are arranged in a matrix of multiple rows and multiple columns, the distribution grooves have two forms, the first sub-groove connects the adjacent flow-through grooves in the same column, and the second sub-groove connects the adjacent flow-through grooves in the same row. The first sub-grooves and the second sub-grooves on the two distribution plates cooperate to connect the micro-channel flat tubes 1 in series, so that the refrigerant in the evaporator flows through the micro-channel flat tubes 1 in each row in turn.

[0102] Referring to Figures 3 to 6 In a possible embodiment, as shown in the figure, the first distribution plate is provided with the first sub-grooves 4111 at the edge position and the second sub-grooves 4112 in the middle. The second sub-grooves 4112 in the middle are used to connect the micro-channel flat tubes in the same row, and the first sub-grooves 4111 at the edge are used to connect the micro-channel flat tubes in the adjacent two rows. Thus, the refrigerant flows through the micro-channel flat tubes 1 in the same row in turn, and then flows to the micro-channel flat tubes 1 in the next row through the corresponding first sub-grooves 4111.

[0103] Referring to Figure 5 In a possible embodiment, as shown in the figure, the first sub-groove 4111 includes a flow guide groove 4111a and two connecting grooves 4111b. The two connecting grooves 4111b are respectively matched with the two corresponding first flow-through grooves 21, and are respectively connected to the two corresponding first flow-through grooves 21. The flow guide groove 4111a extends in the vertical direction and is respectively connected to the two connecting grooves 4111b, and is used to guide the refrigerant to the micro-channel flat tubes 1 in the next row.

[0104] Continuing to refer to Figure 5 As shown in the figure, the second sub-groove 4112 includes a flow guide groove 4112a and two connecting grooves 4112b. The two connecting grooves 4112b are respectively matched with the two corresponding first flow-through grooves 21, and are respectively connected to the two corresponding first flow-through grooves 21. The flow guide groove 4112a extends in the horizontal direction and is respectively connected to the two connecting grooves 4112b.

[0105] In addition, referring to Figure 6 As shown in the figure, the second distribution plate 51 can only include the second sub-groove, which extends in the horizontal direction. Specifically, the second sub-groove includes a flow guide groove 511a and two connecting grooves 511b. The two connecting grooves 511b are respectively matched with the two corresponding second flow-through grooves 31, and are respectively connected to the two corresponding second flow-through grooves 31. The flow guide groove 511a extends in the horizontal direction and is respectively connected to the two connecting grooves 511b.

[0106] Referring to Figure 1 and Figure 3 In a possible embodiment, as shown in the figures, the evaporator includes a first heating plate 6 and a second heating plate 7. The first heating plate 6 is connected to the first sealing plate 42, and the second heating plate 7 is connected to the second sealing plate 52.

[0107] In this embodiment, heating plates are arranged on both sides of the evaporator for defrosting and thawing of the evaporator, and the sealing plates can directly contact the refrigerant medium flowing through the micro-channel flat tubes 1, so that the heating plates are arranged on the isolation plates to facilitate the transfer of heat to the evaporator to heat the refrigerant medium, thereby achieving the effect of defrosting and thawing.

[0108] In a possible embodiment, as shown in Figure 3 and Figure 4 , the first flow distribution plate 41 is provided with a liquid inlet groove 412 and a liquid outlet groove 413, and the liquid inlet groove 412 and the liquid outlet groove 413 are respectively connected to a first flow channel 21. The first sealing plate 42 is provided with a liquid inlet 421 connected to the liquid inlet groove 412 and a liquid outlet 422 connected to the liquid outlet groove 413. The evaporator further comprises a liquid inlet pipe 423 and a liquid outlet pipe 424, wherein the liquid inlet pipe 423 is connected to the liquid inlet 421, and the liquid outlet pipe 424 is connected to the liquid outlet 422. The refrigerant flows into the liquid inlet pipe 423, flows through each micro-channel flat tube 1, and then flows out of the liquid outlet pipe 424.

[0109] As shown in Figure 6 , the plurality of micro-channel flat tubes 1 include first flat tubes 11 and second flat tubes 12, the flow area of the first flat tubes 11 is larger than that of the second flat tubes 12, and the first flat tubes 11 are arranged downstream of the second flat tubes 12.

[0110] In the prior art, the pipe diameters of the evaporator tubes are the same, and the refrigerant state changes from a small volume in a liquid state to an increased volume in a gas-liquid two-phase and a complete gas state. Designing the pipe diameter according to the maximum size wastes heat exchange materials. In the present application, the evaporator is provided with flat tubes having different flow areas, and the flat tubes with a large flow area are arranged downstream of the flat tubes with a small flow area. When the refrigerant state changes to a liquid state, it is located in the flat tubes with a small flow area, and when the refrigerant state changes to a gas-liquid two-phase and a complete gas state, it has already flowed to the flat tubes with a large flow area. The flat tubes with a large flow area are matched with the refrigerant state, the structure design is more reasonable, the evaporator can be designed to be smaller, materials are saved, and the occupied space is small.

[0111] In a possible embodiment, as shown in Figure 6 , the plurality of micro-channel flat tubes 1 are arranged in multiple rows and multiple columns, the evaporator comprises a plurality of first flat tubes 11 and a plurality of second flat tubes 12, each first flat tube 11 is arranged in the same row, and each second flat tube 12 is arranged in the same row. It can be understood that the evaporator of the present application can also comprise a plurality of third flat tubes, fourth flat tubes, etc., and each row of flat tubes is arranged in sequence according to the order of increasing or decreasing flow area.

[0112] To sum up, in the application, the micro-channel flat tube 1 is used for the evaporation pipe, and the heat exchange efficiency is improved; a plurality of plate bodies are installed at both ends of each micro-channel flat tube 1, and each micro-channel flat tube is connected through the flow-through grooves and the flow distribution grooves on the plate bodies, without needing to bend the micro-channel flat tube 1, so that the flat tube is not needed to be bent in the normal direction of the large plane, the application range of the evaporator is expanded, and the evaporator can be applied to a refrigerator system.

[0113] The above only is the preferred embodiment of the application, and is not used to limit the application, and any modification, equivalent replacement, improvement and the like within the spirit and principle of the application should be included in the protection range of the application.

Claims

1. An evaporator, characterized in that, include: Multiple microchannel flat tubes (1); The first flow plate (2) has multiple first flow grooves (21), and the first end of each of the microchannel flat tubes (1) is connected to the corresponding first flow groove (21). The second flow plate (3) has multiple second flow grooves (31), and the second end of each microchannel flat tube (1) is connected to the corresponding second flow groove (31). The first diversion plate assembly (4) is connected to the first flow plate (2). The first diversion plate assembly (4) has a plurality of first diversion slots (411), and each first diversion slot (411) is connected to at least two first flow slots (21). The second diversion plate assembly (5) is connected to the second flow plate (3). The second diversion plate assembly (5) has a plurality of second diversion slots (511), and each second diversion slot (511) is connected to at least two second flow slots (31). Each of the first diversion channels (411) and the second diversion channels (511) connects each of the microchannel flat tubes (1), so that the refrigerant entering the evaporator flows through each of the microchannel flat tubes (1) and is then discharged. The first diverter assembly (4) includes a first diverter (41) and a first sealing plate (42); The first diverter plate (41) is attached to the first flow plate (2); The first diversion plate (41) is provided with a first diversion groove (411) through it. The first sealing plate (42) is attached to the side of the first diversion plate (41) away from the first flow plate (2) to seal each of the first diversion grooves (411). The second diverter assembly (5) includes a second diverter (51) and a second sealing plate (52); The second diverter plate (51) is attached to the second flow plate (3); The second diversion plate (51) is provided with the second diversion groove (511) through it; The second sealing plate (52) is attached to the side of the second diversion plate (51) away from the second flow plate (3) to seal each of the second diversion grooves (511). The evaporator includes a first heating plate (6) and a second heating plate (7); The first heating plate (6) is connected to the first sealing plate (42), and the second heating plate (7) is connected to the second sealing plate (52).

2. An evaporator according to claim 1, characterized in that, Each of the first flow grooves (21) is distributed in a matrix on the first flow plate (2); Each of the second flow grooves (31) is distributed in a matrix on the second flow plate (3).

3. An evaporator according to claim 2, characterized in that, Each of the first diversion channels (411) and / or each of the second diversion channels (511) includes a first sub-channel (4111) and a second sub-channel (4112). The first sub-slot (4111) extends vertically and is used to connect two adjacent first flow slots (21) or two second flow slots (31) in the same column. The second sub-slot (4112) extends horizontally and is used to connect two adjacent first flow slots (21) or two second flow slots (31) in the same row.

4. An evaporator according to claim 3, characterized in that, The first sub-slot (4111) and the second sub-slot (4112) both include a drainage channel (4111a) and two connecting channels (4111b). The shapes of the two connecting grooves (4111b) are respectively matched with the corresponding two first flow grooves (21) or two second flow grooves (31); The two connecting grooves (4111b) are respectively connected to the corresponding two first flow grooves (21) or two second flow grooves (31); The drainage channel (4111a) extends horizontally or vertically and is respectively connected to the two connecting channels (4111b).

5. An evaporator according to any one of claims 1-4, characterized in that, The first diverter plate (41) is provided with an inlet tank (412) and an outlet tank (413). The liquid inlet tank (412) and the liquid outlet tank (413) are respectively connected to a first flow channel (21); The first sealing plate (42) is provided with an inlet (421) that connects to the liquid inlet tank (412) and an outlet (422) that connects to the liquid outlet tank (413). The refrigerant flows in through the inlet (421), passes through each microchannel flat tube (1), and then flows out through the outlet (422).

6. An evaporator according to any one of claims 1-4, characterized in that, The plurality of microchannel flat tubes (1) include a first flat tube (11) and a second flat tube (12); The flow area of ​​the first flat tube (11) is greater than the flow area of ​​the second flat tube (12); The first flat tube (11) is located downstream of the second flat tube (12).

7. An evaporator according to claim 6, characterized in that, Multiple microchannel flat tubes (1) are arranged in multiple rows and columns; The evaporator includes a plurality of first flat tubes (11) and a plurality of second flat tubes (12). Each of the first flat tubes (11) is arranged in the same row; Each of the second flat tubes (12) is located in the same row.

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