Spiral micro-channel heat exchanger with self-cleaning flow guiding structure

Abstract

The application provides a spiral micro-channel heat exchanger with a self-cleaning flow guide structure and relates to the heat exchanger field.The spiral micro-channel heat exchanger comprises a top cover plate, a heat exchange sheet one, a heat exchange sheet two and a bottom cover plate, the heat exchange sheet one and the heat exchange sheet two are provided with a spiral flow channel, and at least one side outer wall of the spiral flow channel is provided with a flow guide scraper capable of rotating into the spiral flow channel.In the application, the flow guide scraper capable of rotating into the spiral flow channel is arranged on the inner wall of the spiral channel, so that the spiral channel is cleaned, specifically, the upper and lower two side walls of the spiral channel are scraped and cleaned along with the rotation of the flow guide scraper; through the angle adjustment after the rotation of the flow guide scraper, the flowing liquid is guided to the inner wall of the spiral channel on the opposite side by using the flow guide supercharging mode, and the left and right sides of the spiral channel are washed and cleaned.

Description

Technical Field

[0001] This invention relates to the field of heat exchangers, and more specifically, to a spiral microchannel heat exchanger with a self-cleaning flow guiding structure. Background Technology

[0002] Spiral microchannel heat sinks are miniaturized heat dissipation devices proposed to address the heat dissipation problem of high heat flux density microelectronics. Existing spiral microchannel heat sinks can be referenced from "A Spiral Microchannel Heat Exchanger" (application number 201611049040.0), which includes a top cover plate, heat exchange plate one, heat exchange plate two, and a bottom cover plate two. Heat exchange plate one and heat exchange plate two have etched fins on one side surface, forming a spiral microchannel for the fluid. This achieves efficient heat transfer between fluids and effectively reduces the impact of acceleration on heat exchanger performance.

[0003] However, existing spiral microchannel radiators require cleaning of their spiral channels after use. This is mainly because impurities and dirt in the fluid will accumulate in the channels during operation, which will increase flow resistance, reduce heat transfer efficiency, and in severe cases, may even block the channels, affecting the normal operation of the equipment. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides a spiral microchannel heat exchanger with a self-cleaning flow guiding structure, which aims to improve the problem of spiral microchannel radiators requiring cleaning of their spiral channels after use.

[0005] This invention is implemented as follows:

[0006] The present invention provides a spiral microchannel heat exchanger with a self-cleaning flow guiding structure, including a top cover plate, a first heat exchange plate, a second heat exchange plate, and a bottom cover plate. The first heat exchange plate and the second heat exchange plate are provided with spiral flow channels, and at least one inner wall of the spiral flow channel is provided with a flow guiding scraper that can rotate into the spiral flow channel.

[0007] Preferably, the vertical height of the guide scraper is the same as the vertical height of the spiral flow channel.

[0008] Preferably, the outer wall of the guide scraper extends along the side wall of the spiral flow channel.

[0009] Preferably, the length of the guide scraper is the same as the width of the spiral flow channel.

[0010] Preferably, the guide scrapers are provided on both inner walls of the same spiral flow channel.

[0011] Preferably, the rotation center of the guide scraper on both sides of the inner wall of the same spiral flow channel is located in the radial direction of the spiral flow channel.

[0012] Preferably, an intermediate plate is provided between the first heat exchange plate and the second heat exchange plate, and the spiral flow channel is located on both sides of the intermediate plate.

[0013] Preferably, the spiral flow channel is in multiple sets, and the multiple sets of spiral flow channels are arranged sequentially from the inside to the outside.

[0014] Preferably, the spiral flow channel is formed by two sets of spiral sidewalls, and the spiral sidewalls slide vertically on the heat exchange plate one or the heat exchange plate two.

[0015] Preferably, the length of the guide blade is an integer multiple of the width of the spiral flow channel.

[0016] The beneficial effects of this invention are:

[0017] In this invention, a flow guide scraper is provided on the inner wall of the spiral channel, which can rotate inward to clean the spiral channel. Specifically, as the flow guide scraper rotates, it scrapes and cleans the upper and lower side walls of the spiral channel. By adjusting the angle after the flow guide scraper rotates, the flowing liquid is guided to the inner wall of the spiral channel on the opposite side by means of flow guidance and pressurization, thereby completing the rinsing and cleaning of the left and right sides of the spiral channel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a spiral microchannel heat exchanger with a self-cleaning flow guiding structure provided by an embodiment of the present invention;

[0020] Figure 2 This is a top view of heat exchange plate one;

[0021] Figure 3 This is a diagram showing the initial state of the guide vane located in the spiral flow channel;

[0022] Figure 4 This is a diagram showing the state of the guide vane on the left side of the spiral flow channel after it has rotated.

[0023] Figure 5 This is a diagram showing the state of the guide vane on the right side of the spiral flow channel after it has rotated.

[0024] Figure 6 This is a diagram showing the state of the left and right guide vanes in the spiral flow channel after they rotate simultaneously.

[0025] Figure 7 It is a structural diagram of the guide vane, rotating shaft, and gear;

[0026] Figure 8 This is a diagram showing the state of a portion of the spiral sidewall detaching from heat exchange plate one or heat exchange plate two.

[0027] In the picture:

[0028] 1. Top cover plate; 2. Heat exchange plate one; 3. Heat exchange plate two; 4. Bottom cover plate; 5. Spiral flow channel; 6. Spiral sidewall; 7. Guide scraper; 8. Intermediate plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example

[0031] Reference Figures 1-8 The existing spiral microchannel heat exchanger consists of four parts from top to bottom: a top cover plate 1, heat exchange plate one 2, heat exchange plate two 3, and a bottom cover plate 4. A spiral fluid flow channel is formed between heat exchange plate one 2 and the top cover plate 1. Furthermore, the top cover plate 1 has a fluid inlet and a fluid outlet, allowing fluid one to flow from the fluid inlet into the fluid flow channel and then out from the fluid outlet. Correspondingly, a spiral fluid flow channel is formed between heat exchange plate two 3 and the bottom cover plate 4. Furthermore, the bottom cover plate 4 has a fluid inlet and a fluid outlet, allowing fluid two to flow from the fluid inlet into the fluid flow channel and then out from the fluid outlet.

[0032] There is a temperature difference between fluid one and fluid two, meaning that heat is dissipated after heat exchange between the low-temperature fluid and the high-temperature fluid. Furthermore, in some embodiments, to enhance the heat exchange effect, the spiral flow directions of the low-temperature fluid and the high-temperature fluid are opposite. Specifically, one spiral channel 5 flows from the inside to the outside, and the other spiral channel 5 flows from the outside to the inside, that is, heat exchange is achieved through convection, and heat exchange is achieved through heat exchange plate one 2 and heat exchange plate two 3.

[0033] Based on the basic structural composition of the existing spiral microchannel heat exchanger, in order to solve the problem of impurities adhering to the inner wall of the spiral channel 5, the present invention has made structural improvements to the spiral channel 5 of the existing spiral microchannel heat exchanger. The improved spiral microchannel heat exchanger performs self-cleaning of the spiral channel 5 from two treatment angles: scraping and high-pressure flushing. The improvement is that: at least one inner wall of the spiral channel 5 is provided with a guide scraper 6 that can rotate into the spiral channel 5.

[0034] The scraping process is as follows: (Refer to...) Figures 2-6 As the guide scraper 6 rotates into the spiral channel 5, the impurities on the upper and lower side walls of the spiral channel 5 are scraped off as the guide scraper 6 rotates outward from the inner wall of the spiral channel 5.

[0035] Furthermore, the upper sidewall of the guide scraper 6 is in contact with the inner wall of one side of the spiral channel 5, and thus rotates with the spiral channel 5 to scrape away impurities from the sidewall of the spiral channel 5. Specifically, when heat exchange plate 1 is above heat exchange plate 2, the upper sidewall of the guide scraper 6 scrapes away impurities from the sidewall of the spiral channel 5 on the top cover plate 1 and heat exchange plate 2; when heat exchange plate 1 is below heat exchange plate 2, the upper sidewall of the guide scraper 6 scrapes away impurities from the sidewall of the spiral channel 5 on the bottom cover plate 4 and heat exchange plate 1.

[0036] Furthermore, the lower sidewall of the guide scraper 6 is in contact with the inner wall of the other side of the spiral channel 5. The sidewall of the spiral channel 5 is positioned relative to the upper sidewall of the guide scraper 6, and thus, as the spiral channel 5 rotates, it scrapes away impurities from the other sidewall of the spiral channel 5. Specifically, when heat exchange plate 1 is above heat exchange plate 2, the lower sidewall of the guide scraper 6 scrapes away impurities from the sidewalls containing the spiral channel 5 on heat exchange plate 1 and bottom cover plate 4 respectively; when heat exchange plate 1 is below heat exchange plate 2, the lower sidewall of the guide scraper 6 scrapes away impurities from the sidewalls containing the spiral channel 5 on heat exchange plate 1 and top cover plate 1 respectively.

[0037] In summary, based on the rotation setting of the guide scraper 6, impurities on the upper and lower inner walls of the rectangular cross-section spiral channel 5 are scraped off. Furthermore, by rotating the guide scraper 6, the flow direction and velocity of the fluid in the spiral channel 5 are changed, thereby performing high-pressure flushing on the inner wall of the spiral channel 5 on the opposite side of the guide scraper 6, and further cleaning the impurities on the left and right inner walls of the rectangular cross-section spiral channel 5.

[0038] Reference Figures 3-6 As the guide scraper 6 rotates, the flow surface of the spiral channel 5 at the position of the guide scraper 6 is changed, that is, the flow surface is reduced, the flow velocity of the fluid flowing between the guide scraper 6 and the spiral channel 5 becomes stronger, and through the guidance of the guide scraper 6, it flows to the inner wall of the spiral channel 5 relative to the guide scraper 6, thereby flushing and cleaning the inner wall of the spiral channel 5 relative to the guide scraper 6.

[0039] In some embodiments, the impact position after the flow is guided by the guide scraper 6 can be adjusted by changing the rotation angle of the guide scraper 6, thereby changing the rinsing position relative to the inner wall of the guide scraper 6, so that the rinsing position can cover the left or right wall of the spiral channel 5. In addition, the coverage area can also be enhanced by changing the density of the guide scrapers 6. The density is set by changing the number of scrapers, which will not be described in detail here.

[0040] In some embodiments, the rotating structure of the guide scraper 6 and the driving structure based on the rotating structure are configured as follows:

[0041] The flow guide scraper 6 is rotated by a shaft. Specifically, the rotation is achieved by a rotating shaft located at one end of the flow guide scraper 6, with one end of the rotating shaft passing through the flow guide scraper 6. The rotating shaft is driven to rotate by an external drive structure, which in turn drives the flow guide scraper 6 to rotate.

[0042] In some embodiments, the rotation shaft and the drive guide scraper 6 are fitted together by a plug-in connection. Specifically, the outer wall of the rotation shaft has sharp edges, such as a triangular or quadrangular prism structure, so that after the rotation shaft is vertically inserted into the guide scraper 6, the guide scraper 6 can rotate as the rotation shaft rotates. Furthermore, the guide scraper 6 is provided with a through hole corresponding to the outer wall of the rotation shaft, wherein the inner wall size of the through hole is the same as the outer diameter of the rotation shaft.

[0043] Furthermore, to facilitate the rotation of the guide scraper 6, the inner wall of the spiral channel 5 is provided with a receiving groove that cooperates with the guide scraper 6. The inner wall shape of the receiving groove is the same as the outer wall shape of the guide scraper 6. When the guide scraper 6 rotates into the receiving groove, the outer wall of the guide scraper 6 near the spiral channel 5 has the same streamline distribution as the inner wall of the spiral channel 5. Specifically, structurally, the outer wall of the guide scraper 6 extends along the side wall of the spiral channel 5, and the length of the guide scraper 6 is the same as the width of the spiral channel 5, thus avoiding the guide scraper 6 from obstructing the normal flow of the spiral channel 5.

[0044] In this embodiment, to ensure that the guide scraper 6 fully scrapes the inner wall of the spiral channel 5, the vertical height of the guide scraper 6 is the same as the vertical height of the spiral channel 5. Specifically, the structural feature is that the depth of the receiving groove is the same as the vertical height of the spiral channel 5. This causes the upper and lower side walls of the guide scraper 6 to fit against the upper and lower inner walls of the spiral channel 5, respectively. Furthermore, as the guide scraper 6 rotates, it scrapes away impurities from the upper and lower inner walls of the spiral channel 5.

[0045] In this embodiment, the spiral flow channel 5 is formed by two sets of spiral sidewalls 50, specifically, refer to Figures 2-6The inner diameters of the two sets of spiral sidewalls 50 are different. This difference in inner diameter causes an intermittent spiral flow channel to be formed between the two sets of spiral sidewalls 50, thus forming a spiral flow channel 5.

[0046] In some embodiments, based on the arrangement of the spiral sidewall 50 and the rotating shaft, this embodiment also discloses a detachable assembly structure for the spiral sidewall 50, the guide scraper 6, and the rotating shaft. Specifically, referring to... Figure 7 First, one end of the rotating shaft is provided with an anti-detachment flange; second, the spiral sidewall 50 is composed of an end wall and a cover, and a storage groove is set on the end wall. The end of the storage groove near the cover is open. When the guide scraper 6 is placed, it is inserted from the open position. The cover and the spiral sidewall 50 are of the same width. The cover and the end wall are locked together by multiple locking bolts.

[0047] It should be noted that the cap has a through-hole for the rotation of the rotating shaft, wherein the length of the rotating shaft including the corners is the same as the depth of the storage groove. Furthermore, the end of the rotating shaft away from the anti-detachment flange has a cylindrical structure, that is, the inner wall of the through-hole on the cap has the same outer diameter as the cylindrical end of the rotating shaft, ensuring that the rotating shaft can rotate relative to the cap. To ensure waterproofing, a waterproof layer can be provided on the outer wall of the cylindrical end of the rotating shaft.

[0048] Based on the improved structure of the spiral sidewall 50, the guide vane 6, and the rotating shaft, the assembly process is as follows:

[0049] The assembly process of the rotating shaft and the guide scraper 6 is as follows: the rotating shaft with the anti-detachment flange is inserted along the through-hole of the guide scraper 6 to form assembly A;

[0050] The assembly process between assembly A and the end wall is as follows: Assembly A is placed into the storage groove from the open position of the storage groove on the end wall to form assembly B. It should be noted that: in this process, to avoid the gap between the guide scraper 6 and the storage groove caused by the protruding anti-detachment flange, the inner wall of the storage groove on the side away from the open is provided with a rotating groove for the rotation of the anti-detachment flange, wherein the depth of the rotating groove is the same as the thickness of the anti-detachment flange;

[0051] The assembly process between assembly B and the cap is as follows: the cap is installed against the inner wall of the side containing the open storage slot. The installation structure can be detached and connected via bolts or snap-fit ​​components. During installation, the through-hole of the cap must pass through the cylindrical end structure of the rotating shaft, causing the rotating shaft to protrude from the cap, facilitating the subsequent drive structure to drive the rotating shaft. After the cap is installed, a spiral sidewall 50, a guide scraper 6, and a rotating shaft are formed as an integrated structure.

[0052] Based on the configuration of the spiral sidewall 50, the guide scraper 6, and the rotating shaft structure, in some embodiments, an external drive structure for driving the rotating shaft of the protruding cover is also disclosed: it consists of a gear and a rack. Specifically, a gear is fixed to the outer wall of the rotating shaft of the protruding cover, and the gear meshes with a rack, wherein the rack is a flexible rack (not shown in the figure), similar to a zipper structure, and the rack is spirally arranged. The spiral arrangement is the same as the spiral shape of the spiral sidewall 50. When the rack is pulled, the rotating shaft on the same spiral sidewall 50 rotates synchronously, thereby causing the guide scraper 6 on the same spiral sidewall 50 to rotate by the same angle.

[0053] Furthermore, in some embodiments, a rack constraint track with a constraining rack is provided, wherein the shape of the rack constraint track is the same as the spiral shape of the spiral sidewall 50, and the rack constraint track is fixed inside the spiral microchannel heat exchanger. There are no restrictions on the fixing method and the fixing position. The rack constraint track is C-shaped, and the rack sidewall is provided with a flexible soft guide rail, which can be made of materials such as plastic. The C-shaped rack constraint track is provided with a slide rail for sliding the flexible soft guide rail. The slide rail has the same spiral shape as the spiral sidewall 50. Since the rack is set on the flexible soft guide rail, the movement of the flexible soft guide rail is constrained by the slide rail in the rack constraint track, further constraining the sliding trajectory of the rack.

[0054] In some embodiments, the rack is driven to slide along the rack-constrained track by driving the flexible soft guide rail. The structure of driving the flexible soft guide rail can be composed of linear drive components, linear push rods or cylinders, or winding components and winding drum structures (not shown in the figure).

[0055] This embodiment also discloses that the guide scraper 6 is configured in two sets, located on the left and right inner walls of the spiral channel 5 respectively. This configuration has the following effects: 1. It can increase the scraping area of ​​the guide scraper 6. The guide scraper 6 is set on one side wall of the spiral channel 5, and its scraping range is: the circular surface of the guide scraper 6 centered on the rotation axis. By adding guide scrapers 6 on opposite sides, the scraping range of the guide scraper 6 is increased; 2. It can adjust the guiding direction, thereby adjusting the high-pressure flushing position. It should be noted that: in this effect, the guide scrapers 6 on both sides of the same spiral channel 5 are set by independent driving structures, that is... The guide scraper 6 located on the left side of the spiral flow channel 5 is driven by the same rack, and the guide scraper 6 located on the right side of the spiral flow channel 5 is driven by another rack. The driving methods are as follows: 1. Drive the guide scraper 6 on the left side of the spiral flow channel 5 alone, and flush the inner wall of the right side of the spiral flow channel 5 with the high-pressure liquid formed after the flow is guided; 2. Drive the guide scraper 6 on the right side of the spiral flow channel 5 alone, and flush the inner wall of the left side of the spiral flow channel 5 with the high-pressure liquid formed after the flow is guided. When the guide scrapers 6 on the left and right sides are adjusted at the same time, the flushing position can be further finely controlled, and the flushing force after the flow is guided can be further adjusted.

[0056] In some embodiments, the arrangement of the two sets of guide scrapers 6 within the same spiral channel 5 is further defined. Specifically, the rotation center of the guide scrapers 6 on both sides of the inner wall of the same spiral channel 5 is located in the radial direction of the spiral channel 5. This arrangement ensures that the guide scrapers 6 on the opposite right side can cooperate with each other to more precisely adjust the rinsing position; at the same time, it does not affect the operation of the guide scrapers 6 on a single side wall.

[0057] A spiral microchannel heat exchanger with a self-cleaning flow guiding structure also includes an intermediate plate 7, which improves the formation of the spiral flow channel 5. Specifically, the configuration is as follows:

[0058] An intermediate plate 7 is also provided between heat exchange plate 1 2 and heat exchange plate 2 3. The spiral flow channel 5 is located on both sides of the intermediate plate 7. The heat exchange surfaces of fluid 1 and fluid 2 achieve heat exchange through the intermediate plate 7.

[0059] Reference Figure 1 and Figure 8 The spiral channels 5 for fluid one and fluid two flow are located on both sides of the intermediate plate 7.

[0060] Furthermore, based on the structural composition of the intermediate plate 7 and the spiral sidewall 50 containing the guide scraper 6, the fitting and connection relationships between the two are as follows:

[0061] If the spiral sidewall 50 is disposed on heat exchange plate 1 2 or heat exchange plate 2 3, then the spiral flow channel 5 of fluid 1 is composed of heat exchange plate 1 2, intermediate plate 7 and two adjacent spiral sidewalls 50; the spiral flow channel 5 of fluid 2 is composed of heat exchange plate 2 3, intermediate plate 7 and two adjacent spiral sidewalls 50.

[0062] In the prior art, there are multiple sets of spiral channels 5, arranged sequentially from the inside to the outside. Furthermore, considering that the width of the spiral channels 5 is too small, resulting in an excessively small size of the guide scraper 6, affecting actual assembly, and that overly dense installation of the spiral channels 5 increases installation difficulty, this embodiment addresses these issues with structural improvements. The specific improvements are as follows:

[0063] The spiral sidewall 50 slides vertically on heat exchange plate 1 (2) or heat exchange plate 2 (3), as shown in the reference. Figure 8 Based on the above technical improvements, when cleaning spiral microchannels, multiple spiral microchannels can be combined and then cleaned separately. For specific methods, please refer to [reference needed]. Figure 8For example, by moving the two middle spiral sidewalls 50 downwards until they are flush with the sidewalls of heat exchange plate 2 or heat exchange plate 3, the width of the spiral flow channel 5 located between heat exchange plate 2 or heat exchange plate 3 and the middle plate 7 increases, thus facilitating the setting of the guide scraper 6 and increasing its size for easier assembly. However, this technical improvement requires multiple cleaning operations, i.e., sequentially hiding the spiral sidewalls 50 that do not need cleaning while retaining those that do need cleaning. Consequently, the length of the guide scraper 6 is actually the distance between the two spiral sidewalls 50 that need cleaning.

[0064] Preferably, in some embodiments, the length of the guide vane 6 is an integer multiple of the width of the spiral channel 5, referring to... Figure 8 This configuration helps ensure that the length of the guide scraper 6 is equal, which further facilitates the production of the guide scraper 6.

[0065] Finally, it should be added that:

[0066] In some embodiments, the driving force for the vertical linear sliding of the spiral sidewall 50 can be synchronously used based on the configuration of the driving structure. This process is the opposite of the driving method when the guide scraper 6 rotates. Specifically, when the gear rotates in one direction, it drives the guide scraper 6 to rotate into the spiral channel 5; when the gear rotates in another direction, it drives the guide scraper 6 to rotate away from the spiral channel 5. Furthermore, the spiral sidewall 50 is driven to slide vertically by driving the rotating shaft.

[0067] Furthermore, the structure of the upper gear and the rotating shaft is configured as follows:

[0068] The gear is rotatably fitted onto the outer wall of the cylindrical end of the rotating shaft. Preferably, the inner wall of the gear has two symmetrically arranged cylindrical protrusions, while the outer wall of the cylindrical end of the rotating shaft has a guide groove that mates with the cylindrical protrusions. (Refer to...) Figure 7 The guide slide consists of two parts: a horizontal slide and an inclined drive slide, with one end of the inclined drive slide connected to one end of the horizontal slide.

[0069] Furthermore, the fit between the upper gear and the rotating shaft is as follows:

[0070] 1. When the gear drives the guide scraper 6 to rotate into the spiral channel 5, the process is as follows: the cylindrical protrusion on the inner wall of the gear moves along the horizontal slide groove away from the inclined drive groove until the cylindrical protrusion moves to the end of the horizontal slide groove away from the inclined drive groove. At this time, with the rotation of the gear, the guide scraper 6 is caused to rotate by the resistance of the cylindrical protrusion, that is, to rotate into the spiral channel 5.

[0071] 2. The working process of the gear-driven rotating shaft driving the spiral sidewall 50 to slide vertically is as follows: The gear rotates in the opposite direction, that is, the rack is pulled in the opposite direction, and the cylindrical protrusion moves along the horizontal slide groove relative to the inclined drive groove until the cylindrical protrusion moves to the connection end of the horizontal slide groove and the inclined drive groove. Then, with the rotation of the gear, the cylindrical protrusion slides along the inclined drive groove. The gear rotates relative to the top cover plate 1, heat exchange plate 1 2, heat exchange plate 2 3 or bottom cover plate 4. The rotation direction is stable and it will not move in the vertical direction. Then, with the rotation of the gear, the vertical component of the resistance force of the cylindrical protrusion against the inner wall of the inclined drive groove causes the rotating shaft to drive the spiral sidewall 50 to move away from the middle plate 7, that is, to complete the hiding of the spiral sidewall 50 below the heat exchange plate 1 2 or the heat exchange plate 2 3 without the need for cleaning.

[0072] It should be added that: In some embodiments, in order to solve the problem of gear rotation and the cylindrical protrusion moving along the horizontal slide groove relative to the oblique driving groove direction, the guide scraper 6 rotates and is stored in the spiral sidewall 50. A spring is provided between the inner wall of the heat exchange plate 2 or the heat exchange plate 3 and the outer wall of the rotating shaft. Under the drive of the spring, the rotating shaft is rotated, thereby causing the guide scraper 6 to rotate and be stored in the spiral sidewall 50.

[0073] In addition to the structural improvements to the gears and rotating shafts, the structure for driving the vertical linear sliding of the spiral sidewall 50 in this embodiment can also be composed of a separately provided vertical linear driving component, such as a cylinder or a push rod motor.

[0074] Finally, in this embodiment, an installation cavity structure is formed between the heat exchange plate 2 and the top cover plate 1, and between the heat exchange plate 3 and the bottom cover plate 4. The installation cavity is used to accommodate the drive structure of the drive spiral sidewall 50 and the gear rack.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A spiral micro-channel heat exchanger with self-cleaning flow guiding structure, comprising a top cover plate (1), a heat exchange sheet one (2), a heat exchange sheet two (3) and a bottom cover plate (4), wherein the heat exchange sheet one (2) and the heat exchange sheet two (3) are provided with spiral flow channels (5), characterized in that, The helical flow channel (5) is provided with a flow guide blade (6) which can rotate in the helical flow channel (5).

2. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 1, characterized in that, The vertical height of the flow guide blade (6) is the same as that of the helical flow channel (5).

3. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 1, characterized in that, The outer wall of the flow guide blade (6) extends along the side wall of the helical flow channel (5).

4. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 1, characterized in that, The length of the flow guide blade (6) is the same as the width of the helical flow channel (5).

5. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 1, characterized in that, Both sides of the helical flow channel (5) are provided with the flow guide blade (6).

6. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 5, characterized in that, The rotation center of the flow guide blade (6) on both sides of the helical flow channel (5) is located in the radial direction extending outward from the center of the helical flow channel (5).

7. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 1, characterized in that, The helical flow channel (5) is located on both sides of the intermediate plate (7) between the first heat exchange plate (2) and the second heat exchange plate (3).

8. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 7, characterized in that, The helical flow channel (5) is formed by two groups of helical side walls (50), and the helical side walls (50) vertically and linearly slide on the first heat exchange plate (2) or the second heat exchange plate (3).

9. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 8, characterized in that, The length of the flow guide blade (6) is an integer multiple of the width of the helical flow channel (5).

10. The helical microchannel heat exchanger with self-cleaning flow guiding structure according to claim 9, characterized in that, ​

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