Micro-channel heat exchange device with controllable heat exchange efficiency

Abstract

The application discloses a micro-channel heat exchange device with controllable heat exchange efficiency, which comprises a supporting device, an adjusting device and a flow guiding device, wherein the supporting device is connected with the adjusting device, and the flow guiding device is connected with the supporting device; the supporting device comprises a shell, and a shunt pipe and a collecting pipe are arranged on the two sides of the shell; the flow guiding device comprises a plurality of partitions; a working cavity is arranged on the shell; the plurality of partitions are sequentially arranged in the working cavity; the working cavity is divided into a plurality of heat exchange grooves by the partitions; the supporting device serves as a main bearing base; the heat exchange space is provided by the working cavity on the shell; the input of cooling medium is controlled by the adjusting device, so that the heat exchange efficiency is controllable; the hot air flow and the cooling medium are respectively subjected to layered flow guiding by the flow guiding device; the shunt pipe and the collecting pipe on the two sides of the shell assist in guiding the fluid medium; the working cavity is divided into a plurality of heat exchange grooves by the partitions, so that multi-stroke heat exchange is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange devices, in particular to a micro-channel heat exchange device with controllable heat exchange efficiency. BACKGROUND

[0002] The micro-channel heat exchange device is a new type of high-efficiency heat exchanger. Compared with traditional heat exchangers, the micro-channel heat exchange device has a larger specific surface area and a more compact structure. However, with the increasing complexity of the use environment, the conventional micro-channel heat exchange device has limited use conditions and cannot meet the high-efficiency operation requirements of the heat exchange device under complex working conditions.

[0003] During the process of cooling hot gas flow, the input heat will fluctuate due to the fluctuation of gas volume transportation. The conventional heat exchange device outputs constant cold energy, and the passive adjustment mechanism cannot automatically adjust the input cold energy according to the input heat, which leads to uncontrollable heat exchange efficiency and affects the heat exchange effect.

[0004] Heat exchange is the process of heat transfer between two fluids due to temperature difference, which is generally completed through heat conduction, heat convection and heat radiation. Heat exchange efficiency generally refers to heat exchange amount / heat exchange area. Compared with general heat transfer process, the heat exchange path in the micro-channel heat exchange device remains unchanged, and the heat exchange area remains constant. In the case of constant heat and output cold energy, the heat exchange efficiency remains constant, that is, the heat exchange amount per unit time remains stable. However, when the input of hot gas flow fluctuates, the output cold energy of the general heat exchange device remains constant, which changes the ratio of cold energy and heat energy, forms a temperature difference, and causes the heat exchange efficiency to fluctuate.

[0005] In addition, the conventional micro-channel heat exchange device has determined the overall cooling path during production and design, which is a fixed path. No matter what kind of heat cooling process is carried out, the hot gas flow will pass through the fixed cooling path, which will cause the temperature of the hot gas flow to drop below the standard temperature, resulting in an excessively long cooling path. SUMMARY

[0006] The present application relates to the technical field of heat exchange devices, in particular to a micro-channel heat exchange device with controllable heat exchange efficiency.

[0007] To solve the above technical problems, the present application provides the following technical scheme:

[0008] The application discloses a micro-channel heat exchange device with controllable heat exchange efficiency, which comprises a supporting device, an adjusting device and a flow guiding device.

[0009] Further, the flow guiding device further comprises a plurality of flat tubes and fins, the flat tubes and the fins are arranged in the heat exchange grooves respectively, the flat tubes are provided with a plurality of flow channels, the shunt pipe is provided with an air inlet channel, the air inlet channel is arranged towards the fins at the end thereof, and the fins are in a wave shape.

[0010] The adjusting device comprises a thermal expansion air bag, a heat exchange sheet and an opening degree plate, one side of the air inlet channel is provided with a temperature sensing groove, the thermal expansion air bag is arranged in the temperature sensing groove, one end of the heat exchange sheet is inserted into the air inlet channel, and the other end of the heat exchange sheet is inserted into the thermal expansion air bag.

[0011] One end of the thermal expansion air bag is in transmission connection with the opening degree plate, the opening degree plate is in sliding connection with the temperature sensing groove, the temperature sensing groove is located between the air inlet channel and a cooling medium inlet, the temperature sensing groove is in communication with the cooling medium inlet, and the other end of the opening degree plate away from the thermal expansion air bag is inserted into the cooling medium inlet.

[0012] Further, the opening degree plate is provided with an opening degree groove.

[0013] When the flow is increased, the opening degree plate slides away from the thermal expansion air bag, and the overlapping area of the opening degree groove and the cooling medium inlet is increased.

[0014] Further, the flow guiding device further comprises a first base plate, a second base plate, a magnetic column and a coil, the collecting pipe is provided with a reversing groove, the reversing groove is arranged towards the fins, the first base plate and the second base plate are in fastening connection, one end of the first base plate and the second base plate is fixedly connected with the wall surface of the reversing groove, the thermal expansion coefficients of the first base plate and the second base plate are different, one end of the magnetic column is in abutment with the first base plate, the collecting pipe is provided with a detection cavity, the coil is arranged in the detection cavity, and one end of the magnetic column away from the first base plate is inserted into the detection cavity.

[0015] Further, the detection cavity is located above the first base plate, and the thermal expansion coefficient of the second base plate is greater than the thermal expansion coefficient of the first base plate.

[0016] Further, the partition plate is provided with a plurality of flow leakage openings, the opening and closing assembly further comprises a flow interception plate and an electromagnet, the flow interception plate and the electromagnet are arranged in the flow leakage openings respectively, the flow leakage openings are provided with through holes at positions corresponding to the fins, the flow interception plate and the through holes of the fins are in sliding connection, the weights of the plurality of flow interception plates gradually decrease along the flow guiding direction of the fins, the flow interception plate is provided with a perforation, the perforation is located in the lower layer of the flow interception plate, and the coil and the electromagnet are in electrical connection.

[0017] When the flow is intercepted, the perforation of the flow interception plate does not pass through the through hole on the fin.

[0018] As an optimization, the micro-channel heat exchange device further comprises a plurality of bypass pipes, and the discharge port is intermittently connected to the side of the fins and the bypass pipes.

[0019] As an optimization, the flat tubes in the same heat exchange groove are located above the fins.

[0020] As an optimization, the adjusting device further comprises a plurality of burrs arranged along the flow passage.

[0021] As an optimization, the burrs are obliquely arranged, and the front end of the burr along the flow direction of the medium inside the flow passage is located at a high position.

[0022] Compared with the prior art, the present application has the following beneficial effects: the air inlet channel is provided with an angle, and a groove is arranged at the angle, so that the hot air moves into the groove under the action of inertia, flows to the outlet of the air inlet channel after impacting the groove wall, the forward flow of the hot air hinders the impact of the reverse flow of the hot air, the hot air in the groove is compressed, one end of the heat exchange fin is inserted into the groove of the air inlet channel, the heat expansion gas bag is filled with compressed gas, heat exchange is performed through the heat exchange fin, the compressed gas in the heat expansion gas bag is expanded, and the opening degree plate is moved to control the flow area of the cooling medium inlet, the cooling capacity is adjusted in real time according to the heat quantity of the inlet, and the heat exchange efficiency is ensured; when the hot gas flow enters the reversing groove, the first base plate and the second base plate in the reversing groove are heated at the same time, the first base plate and the second base plate are made of different materials, and have different expansion rates under the same temperature rise condition, due to the tight connection between the first base plate and the second base plate, the plate material with a smaller expansion rate has a smaller elongation, the plate material with a larger expansion rate has a larger elongation, and the plate material with a larger elongation is limited by the other plate material, thereby forming a curved arc, in the bending process, the magnetic column is driven to move along the detection cavity, the coil moves to cut the magnetic induction line, an induced current is generated, the cooling stroke of the hot gas flow entering the reversing groove for detection is a pre-cooling stroke, temperature monitoring is performed after the same pre-cooling stroke, the higher the temperature, the longer the subsequent cooling stroke required; when the hot gas flow is reduced to a predetermined temperature, the electromagnet and the coil are electrically connected, the same magnetic pole is arranged at the opposite end of the electromagnet and the cutting plate during the electrification of the electromagnet, under the action of the magnetic field repulsion, the cutting plate extends along the discharge port and passes through the through hole on the fin, and the hot gas flow is partially blocked, the hot gas flow after cooling directly passes through the through hole on the fin and enters the discharge port to be discharged, avoiding entering the subsequent stroke and affecting the gas flow efficiency, the weight of the cutting plate is gradually reduced, so that the magnetic force required for the movement of the subsequent cutting plate gradually increases, that is, the higher the temperature, the greater the current on the coil, and the closer the cutting position to the rear end of the cooling stroke, and the cooling stroke length is automatically adjusted according to the residual heat of the hot gas flow. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application together with the embodiments thereof, and are used to explain the application, and do not constitute a limitation on the application. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 is a schematic diagram of the hot air flow guide of the present application;

[0026] Figure 3 is a schematic diagram of the cooling medium flow guide of the present application;

[0027] Figure 4 is Figure 1 is a partial A enlarged view of the view;

[0028] Figure 5 is Figure 1 is a partial B enlarged view of the view;

[0029] Figure 6 is Figure 1 is a partial C enlarged view of the view;

[0030] Figure 7 is a schematic diagram of the hot air flow guide of the present application;

[0031] In the figure: 1 - support device, 11 - shell, 111 - working cavity, 12 - shunt pipe, 121 - air inlet, 122 - temperature sensing groove, 123 - cooling medium inlet, 13 - flow collecting pipe, 131 - detection cavity, 132 - reversing groove, 2 - adjusting device, 21 - thermal expansion air bag, 22 - heat exchange fin, 23 - opening plate, 24 - flash, 3 - flow guide device, 31 - flat tube, 32 - fin, 33 - opening and closing assembly, 331 - first base plate, 332 - second base plate, 333 - flow blocking plate, 334 - electromagnet, 335 - magnetic column, 336 - coil, 34 - partition plate, 341 - flow leakage port, 4 - bypass pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The present application provides technical solutions:

[0034] As Figures 1 to 7As shown, a heat exchange efficiency controllable micro-channel heat exchange device, comprising a support device 1, an adjusting device 2 and a flow guide device 3, the support device 1 and the adjusting device 2 are connected, the flow guide device 3 and the support device 1 are connected, the support device 1 comprises a shell 11, the shell 11 is provided with a shunt pipe 12 and a collecting pipe 13 on both sides respectively, the flow guide device 3 comprises a plurality of partitions 34, the shell 11 is provided with a working cavity 111, the plurality of partitions 34 are sequentially arranged in the working cavity 111, and the working cavity 111 is divided into a plurality of heat exchange grooves by the partitions 34.

[0035] The support device 1 serves as a main bearing base, provides a heat exchange space through the working cavity 111 on the shell 11, controls the input of cooling medium through the adjusting device 2, thereby ensuring that the heat exchange efficiency is controllable, and respectively guides the hot gas flow and the cooling medium through the flow guide device 3, the shunt pipe 12 and the collecting pipe 13 on both sides of the shell 11 assist in guiding the fluid medium, and the working cavity 111 is divided into a plurality of heat exchange grooves through the partitions 34, thereby facilitating multi-stroke heat exchange.

[0036] Further, the flow guide device 3 further comprises a plurality of flat tubes 31 and fins 32, the flat tubes 31 and the fins 32 are respectively arranged in the heat exchange grooves, the flat tubes 31 are provided with a plurality of flow passages, the shunt pipe 12 is provided with an air inlet channel 121, the air inlet channel 121 is arranged towards the fins 32 at the end, and the fins 32 are in a wave shape.

[0037] The adjusting device 2 comprises a thermal expansion air bag 21, a heat exchange sheet 22 and an opening degree plate 23, one side of the air inlet channel 121 is provided with a temperature sensing groove 122, the thermal expansion air bag 21 is arranged in the temperature sensing groove 122, one end of the heat exchange sheet 22 is inserted into the air inlet channel 121, and the other end is inserted into the thermal expansion air bag 21.

[0038] One end of the thermal expansion air bag 21 is in transmission connection with the opening degree plate 23, the opening degree plate 23 is in sliding connection with the temperature sensing groove 122, the temperature sensing groove 122 is located between the air inlet channel 121 and a cooling medium inlet 123, the temperature sensing groove 122 is in communication with the cooling medium inlet 123, and one end of the opening degree plate 23 away from the thermal expansion air bag 21 is inserted into the cooling medium inlet 123.

[0039] The liquid cooling medium is sent into the flow channel on the flat tube 31 through the cooling medium inlet 123, the cooling medium is guided through the flow channel, the hot air flow is sent into the interlayer between the fin 32 and the flat tube 31 through the air inlet 121, the flat tube 31 is made of high-thermal-conductivity material, which facilitates heat exchange between the cooling medium and the hot air flow, thereby cooling the hot air flow, the hot air flow is guided through the wavy fin 32, and the unit density is increased in the upward guiding process, thereby improving the heat exchange efficiency, the air inlet 121 is provided with an angle, and a groove is arranged at the angle, so that the hot air moves into the groove under the action of inertia, flows to the outlet of the air inlet 121 after impacting the groove wall, the hot air flowing forward hinders the impact of the backflowing hot air, so that the hot air in the groove is compressed, one end of the heat exchange fin 22 is inserted into the groove of the air inlet 121, the heat expansion air bag 21 is filled with compressed gas, the heat exchange fin 22 exchanges heat, the compressed gas in the heat expansion air bag 21 is expanded, and the opening degree plate 23 is driven to move, thereby controlling the flow area of the cooling medium inlet 123, the cooling capacity is adjusted in real time according to the inlet heat, so that the cold and heat capacities are adjusted to keep the rated ratio, and the heat exchange efficiency is ensured.

[0040] Further, the opening degree plate 23 is provided with an opening slot;

[0041] When the flow is increased, the opening degree plate 23 slides away from the heat expansion air bag 21, and the overlapping area of the opening slot and the cooling medium inlet 123 is increased.

[0042] The opening slot is arranged on the opening degree plate 23, the flow area is controlled through the opening slot, thereby controlling the cooling medium amount, for example, the hot air flow and the cooling medium are fully heat-exchanged under the rated working condition, the heat exchange capacity generated in the running time is the highest, the cold end can carry 5000 joules of heat, but when the hot air flow increases due to input fluctuation, the heat released by the hot air flow reduced to the rated temperature in the time period is joules, and the cold end can only take away 5000 joules of heat from the hot air flow, so the hot air flow cannot be reduced to the rated temperature, after the heat exchange is completed, the cooled hot air flow is still higher than the rated temperature, and there is still a temperature difference between the cooled hot air flow and the rated temperature, the heat exchange capacity on both sides is always the same during the heat exchange process, when the hot air flow increases, the opening degree plate 23 is driven to extend out by the heat expansion air bag 21, the opening slot extends into the flow area of the cooling medium inlet 123, the instantaneous flow amount is increased, thereby the cooling medium amount is adjusted in real time according to the instantaneous hot air flow, and the heat exchange efficiency is ensured.

[0043] Further, the flow guide device 3 further comprises a first base plate 331, a second base plate 332, a magnetic column 335 and a coil 336, the manifold 13 is provided with a reversing groove 132, the reversing groove 132 faces the fin 32, the first base plate 331 and the second base plate 332 are tightly connected, one end of the first base plate 331 and the second base plate 332 is fixedly connected with the wall surface of the reversing groove 132, the thermal expansion coefficients of the first base plate 331 and the second base plate 332 are different, one end of the magnetic column 335 abuts against the first base plate 331, the manifold 13 is provided with a detection cavity 131, the coil 336 is arranged in the detection cavity 131, and the magnetic column 335 is inserted into the detection cavity 131 from the end away from the first base plate 331.

[0044] The first base plate 331 and the second base plate 332 are fixed at one end through the reversing groove 132 on the manifold 13, the hot air flows into the reversing groove 132 through the gradually formed gaps along the fin 32 and the flat tube 31, and then moves to the next cooling stroke through the reversing groove 132, so that the cooling efficiency is ensured, and the hot air is cooled by heat exchange with the cooling medium in the flat tube 31 during the flowing along the flat tube 31, the detection cavity 131 is located on one side of the reversing groove 132, and is used for mounting the coil 336 and slidingly guiding the magnetic column 335, when the hot air enters the reversing groove 132, the first base plate 331 and the second base plate 332 in the reversing groove 132 are heated at the same time, the materials of the first base plate 331 and the second base plate 332 are different, the expansion rates are different under the same temperature rise condition, the plate material with a smaller expansion rate has a smaller elongation, the plate material with a larger expansion rate has a larger elongation, and the plate material with a larger elongation is limited by the other plate material, so that a curved arc is formed, during the bending process, the magnetic column 335 is driven to move along the detection cavity 131, the coil 336 moves to cut the magnetic induction lines, an induced current is generated, the cooling stroke of the hot air entering the reversing groove 132 for detection is a pre-cooling stroke, and the temperature is monitored after passing through the same pre-cooling stroke, the higher the temperature is, the longer the subsequent cooling stroke is.

[0045] Further, the detection cavity 131 is located above the first base plate 331, and the thermal expansion coefficient of the second base plate 332 is greater than that of the first base plate 331.

[0046] The first base plate 331 is close to the detection cavity 131, the thermal expansion coefficient of the second base plate 332 is greater than that of the first base plate 331, in the expansion process, the second base plate 332 is deformed towards the first base plate 331, so that the first base plate 331 drives the magnetic column 335 to move, and the temperature is monitored.

[0047] Further, the partition plate 34 is provided with a plurality of discharge ports 341, and the opening and closing assembly 33 further comprises a cutoff plate 333 and an electromagnet 334, the cutoff plate 333 and the electromagnet 334 are respectively arranged in the discharge port 341, the discharge port 341 is provided with a through hole corresponding to the fin 32, the cutoff plate 333 and the through hole of the fin 32 are in sliding connection, the weight of the plurality of cutoff plates 333 gradually decreases along the flow direction of the fin 32, the cutoff plate 333 is provided with a perforation, the perforation is located at the lower layer of the cutoff plate 333, and the coil 336 and the electromagnet 334 are electrically connected;

[0048] When the cutoff plate 333 is cut off, the perforation of the cutoff plate 333 does not pass through the through hole on the fin 32.

[0049] According to the discharge port 341 arranged on the partition plate 34, the subsequent cooling stroke of the pre-cooling stroke is adjusted, so that the cooling stroke is automatically adjusted according to different hot gas flow amounts, the heat exchange efficiency is ensured, the hot gas flow is directly discharged from the discharge port 341 when the hot gas flow decreases to a predetermined temperature, and the subsequent stroke is prevented from being congested, thereby affecting the gas conveying efficiency. The electromagnet 334 and the cutoff plate 333 are installed through the discharge port 341, the cutoff plate 333 can slide along the discharge port 341, the electromagnet 334 and the coil 336 are electrically connected, the same magnetic pole is arranged at the opposite end of the electromagnet 334 and the cutoff plate 333 during the electrification process of the electromagnet 334, under the action of the magnetic repulsion force, the cutoff plate 333 extends along the discharge port 341 and passes through the through hole on the fin 32, and the hot gas flow is partially cut off. The hot gas flow after cooling is directly discharged through the through hole on the fin 32 and enters the discharge port 341, so as to avoid entering the subsequent stroke and affecting the gas flow efficiency. By gradually increasing the weight of the subsequent cutoff plate 333, the magnetic force required for the movement of the cutoff plate 333 is gradually increased, that is, the higher the temperature, the greater the current on the coil 336, and the closer the cutoff position to the rear end of the cooling stroke. According to the residual heat of the hot gas flow, the length of the cooling stroke is automatically adjusted. The magnetic pole repulsion force provided by the electromagnet 334 in the local front section makes the cutoff plate 333 further move upwards, so that the gas flow flows into the subsequent stroke from the perforation on the cutoff plate 333, thereby avoiding causing flow resistance.

[0050] As an optimization, the micro-channel heat exchange device further comprises a plurality of bypass pipes 4, and the discharge port 341 is intermittently connected to the bypass pipe 4 away from the fin 32. The bypass pipe 4 and the discharge port 341 are connected, so as to directly guide the hot gas flow after cooling out of the pipe, prevent the flow resistance in the pipe, and improve the heat exchange efficiency.

[0051] As an optimization, the flat tube 31 in the same heat exchange tank is located above the fin 32. By arranging the flat tube 31 in an upper position, the cooling medium and the hot gas flow on the lower fin 32 are fully contacted and heat exchanged, so as to ensure the heat exchange amount.

[0052] As an optimization, the adjusting device 2 further comprises a plurality of burrs 24, and the plurality of burrs 24 are arranged along the flow channel. By arranging the burrs 24 to block the flow of the cooling medium, only gaseous cooling medium is finally discharged, so as to prevent waste of cooling capacity.

[0053] As an optimization, the flash 24 is arranged at an angle, with its front end positioned high along the flow direction of the medium inside the flow channel. The angled arrangement of the flash 24 along the flow direction of the cooling medium ensures that any residual cooling medium remains between adjacent flashes 24, avoiding the need for gas-liquid separation and recooling after it flows out of the heat exchanger.

[0054] The working principle of this invention is as follows: The air intake duct 121 is angled, with a groove at the angle. Hot air moves into the groove due to inertia, impacts the groove wall, and then flows towards the outlet of the air intake duct 121. The forward flow of hot air obstructs the impact of the reverse hot air, compressing the hot air in the groove. One end of the heat exchange fin 22 is inserted into the groove of the air intake duct 121. The thermal expansion bladder 21 is filled with compressed gas. Heat exchange occurs through the heat exchange fin 22, causing the compressed gas in the thermal expansion bladder 21 to expand and push the opening plate 23 to move, thereby controlling the cooling medium inlet 12. The flow area of ​​3 is adjusted in real time according to the heat of the incoming air to ensure heat exchange. When the hot air enters the reversing groove 132, it simultaneously heats the first substrate 331 and the second substrate 332 within the reversing groove 132. The first substrate 331 and the second substrate 332 are made of different materials and have different expansion rates under the same temperature rise conditions. Since the first substrate 331 and the second substrate 332 are tightly connected, the substrate with the smaller expansion rate elongates less, while the substrate with the larger expansion rate elongates more. The substrate with the larger elongation is limited by the other substrate. This creates a curved arc. During the bending process, the magnetic column 335 moves along the detection cavity 131, causing the coil 336 to cut magnetic field lines and generate an induced current. The cooling stroke of the hot airflow entering the commutation slot 132 is called the pre-cooling stroke. After the same pre-cooling stroke, temperature monitoring is performed. The higher the temperature, the longer the subsequent cooling stroke needs to be. When the hot airflow drops to the predetermined temperature, the electromagnet 334 and the coil 336 are electrically connected. During the energization process, the electromagnet 334 and the opposite end of the cut-off plate 333 are the same magnetic poles. Under the action of magnetic repulsion... The flow cut-off plate 333 extends along the drain port 341 and passes through the through hole on the fin 32 to partially block the hot airflow. After cooling, the hot airflow directly enters the drain port 341 through the through hole on the fin 32 and is discharged, avoiding entering the subsequent stroke and affecting the gas flow efficiency. By setting the weight of the flow cut-off plate 333 to decrease, the magnetic force required for the subsequent movement of the flow cut-off plate 333 gradually increases. That is, the higher the temperature, the greater the current on the coil 336, and the closer the cut-off position is to the rear end of the cooling stroke. The length of the cooling stroke is automatically adjusted according to the residual heat of the hot airflow.

[0055] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0056] Finally, it should be noted that the above-mentioned only constitutes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, improvements and the like of the technical solutions described in the foregoing embodiments can still be made. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A microchannel heat exchanger with controllable heat exchange efficiency, characterized in that: The micro-channel heat exchange device comprises a supporting device (1), an adjusting device (2) and a flow guiding device (3), the supporting device (1) and the adjusting device (2) are connected, the flow guiding device (3) and the supporting device (1) are connected, the supporting device (1) comprises a shell (11), the shell (11) is provided with a shunt pipe (12) and a collecting pipe (13) on both sides, the flow guiding device (3) comprises a plurality of partitions (34), the shell (11) is provided with a working cavity (111), and the plurality of partitions (34) are sequentially arranged in the working cavity (111); the working cavity (111) is divided into a plurality of heat exchange grooves by the partitions (34). The flow guiding device (3) further comprises a plurality of flat tubes (31) and fins (32), the flat tubes (31) and the fins (32) are arranged in the heat exchange grooves, the flat tubes (31) are provided with a plurality of flow passages, the shunt pipe (12) is provided with an air inlet channel (121), the air inlet channel (121) is directed towards the fins (32) at the end, and the fins (32) are in a wave shape. The adjusting device (2) comprises a thermal expansion air bag (21), a heat exchange sheet (22) and an opening degree plate (23), one side of the air inlet channel (121) is provided with a temperature sensing groove (122), the thermal expansion air bag (21) is arranged in the temperature sensing groove (122), one end of the heat exchange sheet (22) is inserted into the air inlet channel (121), and the other end is inserted into the thermal expansion air bag (21). One end of the thermal expansion air bag (21) is in transmission connection with the opening degree plate (23), the opening degree plate (23) is in sliding connection with the temperature sensing groove (122), the temperature sensing groove (122) is located between the air inlet channel (121) and a cooling medium inlet (123), the temperature sensing groove (122) is in communication with the cooling medium inlet (123), and one end of the opening degree plate (23) away from the thermal expansion air bag (21) is inserted into the cooling medium inlet (123).

2. The micro-channel heat exchanger with controllable heat exchange efficiency according to claim 1, characterized in that: The opening degree plate (23) is provided with an opening degree groove. When the flow is increased, the opening degree plate (23) slides away from the thermal expansion air bag (21), and the overlapping area of the opening degree groove and the cooling medium inlet (123) is increased.

3. The micro-channel heat exchanger with controllable heat exchange efficiency according to claim 2, characterized in that: The flow guiding device (3) further comprises an opening and closing assembly (33), the opening and closing assembly (33) comprises a first base plate (331), a second base plate (332), a magnetic column (335) and a coil (336), the collecting pipe (13) is provided with a reversing groove (132), the reversing groove (132) is directed towards the fins (32), the first base plate (331) and the second base plate (332) are in fastening connection, one end of the first base plate (331) and the second base plate (332) is fixedly connected with the wall surface of the reversing groove (132), the thermal expansion coefficients of the first base plate (331) and the second base plate (332) are different, one end of the magnetic column (335) is in abutment with the first base plate (331), the collecting pipe (13) is provided with a detection cavity (131), the coil (336) is arranged in the detection cavity (131), and one end of the magnetic column (335) away from the first base plate (331) is inserted into the detection cavity (131).

4. The micro-channel heat exchanger with controllable heat exchange efficiency according to claim 3, characterized in that: The detection cavity (131) is located above the first substrate (331), and the second substrate (332) has a thermal expansion coefficient greater than that of the first substrate (331).

5. The micro-channel heat exchanger with controllable heat exchange efficiency according to claim 4, characterized in that: The partition plate (34) is provided with a plurality of flow discharge ports (341), the opening and closing assembly (33) further comprises a flow interception plate (333) and an electromagnet (334), the flow interception plate (333) and the electromagnet (334) are respectively arranged in the flow discharge port (341), the flow discharge port (341) is provided with a through hole at the corresponding position of the fin (32), the flow interception plate (333) and the through hole of the fin (32) are in sliding connection, the weights of the plurality of flow interception plates (333) gradually decrease along the flow direction of the fin (32), the flow interception plate (333) is provided with a perforation, the perforation is located in the lower layer of the flow interception plate (333), the coil (336) and the electromagnet (334) are electrically connected; When intercepting, the perforation of the flow interception plate (333) does not pass through the through hole on the fin (32).

6. The microchannel heat exchanger of claim 5, wherein: The micro-channel heat exchange device further comprises a plurality of bypass pipes (4), and the flow discharge ports (341) intermittently communicate with the bypass pipes (4) away from one side of the fin (32).

7. The microchannel heat exchanger of claim 6, wherein: The flat tube (31) in the same heat exchange tank is located above the fin (32).

8. The micro-channel heat exchanger with controllable heat exchange efficiency according to claim 7, characterized in that: The adjusting device (2) further comprises a plurality of burrs (24), and the plurality of burrs (24) are arranged along the flow channel.

9. The microchannel heat exchanger of claim 8, wherein: The burrs (24) are arranged obliquely, and the burrs (24) are located at a high position on the side close to the output end along the flow direction of the cooling medium in the flow channel.

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