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

Abstract

The invention provides a spiral micro-channel heat exchanger with a self-cleaning flow guide structure, and relates to the field of heat exchangers, the spiral micro-channel heat exchanger comprises a top cover plate, a first heat exchange plate, a second heat exchange plate and a bottom cover plate, and the first heat exchange plate and the second heat exchange plate are provided with spiral flow channels; the outer wall of at least one side of the spiral flow channel is provided with a flow guide scraper blade capable of rotating towards the inside of the spiral flow channel. The inner wall of the spiral channel is provided with the flow guide scraping blade capable of rotating inwards, the spiral channel is cleaned, and specifically, the upper side wall and the lower side wall of the spiral channel are scraped and cleaned along with rotation of the flow guide scraping blade; through angle adjustment after rotation of the flow guide scraper, flowing liquid is guided to the inner wall of the spiral channel on the opposite side in a flow guide pressurization mode, and flushing and cleaning of the left side and the right side of the spiral channel are completed.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and in particular to a spiral microchannel heat exchanger with a self-cleaning flow-guiding structure. Background Art

[0002] The spiral microchannel heat sink is a miniaturized heat dissipation device designed to address the heat dissipation challenges of high-heat-flux microelectronics. Existing spiral microchannel heat sinks can be referenced in Application No. 201611049040.0, titled "A Spiral Microchannel Heat Exchanger." These heat sinks comprise a top cover plate, heat exchange plates 1 and 2, and a bottom cover plate 2. Heat exchange plates 1 and 2 have corroded fins on one side, forming spiral microchannels for fluid 1. This achieves efficient heat transfer between fluids and effectively reduces the impact of acceleration on heat exchanger performance.

[0003] However, the spiral microchannel radiator in the prior art needs to clean its spiral channel after use. This is mainly because during operation, impurities, dirt, etc. in the fluid will be deposited in the channel, which will increase the flow resistance and reduce the heat transfer efficiency. In severe cases, it may also block the channel and affect the normal operation of the equipment. Summary of the Invention

[0004] In order to make up for the above shortcomings, the present invention provides a spiral microchannel heat exchanger with a self-cleaning guide structure, which aims to improve the problem that the spiral microchannel radiator needs to clean its spiral channels after use.

[0005] The present invention is achieved in that: The present invention provides a spiral microchannel heat exchanger with a self-cleaning guide structure, comprising a top cover plate, a heat exchange plate 1, a heat exchange plate 2 and a bottom cover plate, wherein the heat exchange plate 1 and the heat exchange plate 2 are provided with a spiral flow channel, and the inner wall of at least one side of the spiral flow channel is provided with a guide scraper that can rotate into the spiral flow channel.

[0006] Preferably, the vertical height of the guide scraper is the same as the vertical height of the spiral flow channel.

[0007] Preferably, the outer wall of the guide scraper extends along the side wall of the spiral flow channel.

[0008] Preferably, the length of the guide scraper is the same as the width of the spiral flow channel.

[0009] Preferably, the guide scrapers are provided on both sides of the inner walls of the same spiral flow channel.

[0010] Preferably, the rotation centers of the guide scrapers on the inner walls on both sides of the same spiral flow channel are located in the radial direction of the spiral flow channel.

[0011] Preferably, an intermediate plate is provided between the first heat exchange plate and the second heat exchange plate, and the spiral flow channels are located on both sides of the intermediate plate.

[0012] Preferably, the spiral flow channels are in multiple groups, and the multiple groups of spiral flow channels are arranged in sequence from the inside to the outside.

[0013] Preferably, the spiral flow channel is formed by two groups of spiral side walls, and the spiral side walls slide vertically and linearly on the first heat exchange plate or the second heat exchange plate.

[0014] Preferably, the length of the guide scraper is an integer multiple of the width of the spiral flow channel.

[0015] The beneficial effects of the present invention are: In the present invention, a guide scraper that can rotate inward is provided on the inner wall of the spiral channel to clean the spiral channel. Specifically, as the guide scraper rotates, the upper and lower side walls of the spiral channel are scraped and cleaned; by adjusting the angle of the guide scraper after rotation, the flow liquid is guided to the inner wall of the spiral channel on the opposite side by using the diversion and pressurization method, thereby completing the flushing and cleaning of the left and right sides of the spiral channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a spiral microchannel heat exchanger with a self-cleaning flow-guiding structure provided by an embodiment of the present invention; Figure 2 1 is a top view of heat exchange plate 1; Figure 3 This is the initial state diagram of the guide scraper located in the spiral flow channel; Figure 4 This is a diagram of the guide blade on the left side of the spiral flow channel after rotation; Figure 5 This is a diagram of the state of the guide scraper on the right side of the spiral flow channel after rotation; Figure 6 This is a diagram showing the state after the left and right guide blades in the spiral flow channel rotate simultaneously; Figure 7 This is a structural diagram of the guide blade, rotating shaft and gear; Figure 8 This is a state diagram in which part of the spiral side wall is separated from the heat exchange plate 1 or the heat exchange plate 2.

[0018] In the picture: 1. Top cover; 2. Heat exchange plate 1; 3. Heat exchange plate 2; 4. Bottom cover; 5. Spiral flow channel; 50. Spiral side wall; 6. Guide scraper; 7. Middle plate. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0020] Example Reference Figures 1-8 The spiral microchannel heat exchanger in the prior art is composed of four parts from top to bottom: a top cover plate 1, a heat exchange plate 1 2, a heat exchange plate 2 3, and a bottom cover plate 4. A spiral fluid flow channel 1 is provided between the heat exchange plate 1 2 and the top cover plate 1. Furthermore, a fluid inlet 1 and a fluid outlet 1 are provided on the top cover plate 1. Then, fluid 1 flows from the fluid inlet 1 to the fluid flow channel 1, and then flows out from the fluid outlet 1. Correspondingly, a spiral fluid flow channel 2 is provided between the heat exchange plate 2 3 and the bottom cover plate 4. Furthermore, a fluid inlet 2 and a fluid outlet 2 are provided on the bottom cover plate 4. Then, fluid 2 flows from the fluid inlet 2 to the fluid flow channel 2, and then flows out from the fluid outlet 2.

[0021] There is a temperature difference between fluid 1 and fluid 2, i.e., the low-temperature fluid exchanges heat with the high-temperature fluid and then dissipates the heat. 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 flow channel 5 flows from the inside out, while the other spiral flow channel 5 flows from the outside in. This achieves heat exchange through convection, and heat exchange is achieved through heat exchange plates 1 2 and 2 3.

[0022] Based on the basic structural composition of the spiral microchannel heat exchanger in the prior art, in order to solve the problem of impurities adhering to the inner wall of the spiral flow channel 5, the present invention has made structural improvements to the spiral flow channel 5 of the spiral microchannel heat exchanger in the prior art. The improved spiral microchannel heat exchanger can self-clean the spiral flow channel 5 from two processing angles: scraping and high-pressure flushing. The improvement is that: a guide scraper 6 that can rotate into the spiral flow channel 5 is provided on the inner wall of at least one side of the spiral flow channel 5.

[0023] The scraping process is as follows: Figure 2-Figure 6The guide scraper 6 rotates into the spiral flow channel 5, and as the guide scraper 6 rotates outward from the inner wall of the spiral flow channel 5, the purpose of scraping off impurities on the upper and lower side walls of the spiral flow channel 5 is achieved.

[0024] Furthermore, the upper sidewall of the guide scraper 6 is in contact with the inner wall of one side of the spiral flow channel 5, and then rotates with the spiral flow channel 5 to scrape impurities from the sidewall of the spiral flow channel 5. Specifically, when the heat exchange plate 1 2 is located above the heat exchange plate 2 3, the upper sidewall of the guide scraper 6 scrapes impurities from the sidewalls of the top cover plate 1 and the heat exchange plate 2 3 containing the spiral flow channel 5; when the heat exchange plate 1 2 is located below the heat exchange plate 2 3, the upper sidewall of the guide scraper 6 scrapes impurities from the sidewalls of the bottom cover plate 4 and the heat exchange plate 1 2 containing the spiral flow channel 5.

[0025] Furthermore, the lower sidewall of the guide scraper 6 is in contact with the inner wall of the other side of the spiral flow channel 5. The sidewall of the spiral flow channel 5 is arranged relative to the upper sidewall of the guide scraper 6, and then rotates with the spiral flow channel 5 to scrape impurities from the other sidewall of the spiral flow channel 5. Specifically, when heat exchange plate 1 2 is located above heat exchange plate 2 3, the lower sidewall of the guide scraper 6 scrapes impurities from the sidewall of heat exchange plate 1 2 and the bottom cover plate 4 containing the spiral flow channel 5; when heat exchange plate 1 2 is located below heat exchange plate 2 3, the lower sidewall of the guide scraper 6 scrapes impurities from the sidewall of heat exchange plate 1 2 and the top cover plate 1 containing the spiral flow channel 5.

[0026] In summary, based on the rotation setting of the guide scraper 6, impurities on the upper and lower inner walls of the spiral flow channel 5 with a rectangular cross-section are scraped off. Furthermore, by rotating the guide scraper 6, the flow direction and flow rate of the fluid in the spiral flow channel 5 are changed, thereby performing high-pressure flushing on the inner wall of the spiral flow 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 spiral flow channel 5 with a rectangular cross-section.

[0027] Reference Figure 3-Figure 6 As the guide scraper 6 rotates, the flow surface of the spiral flow channel 5 at the position of the guide scraper 6 is changed, that is, the flow surface is reduced, and the flow velocity of the fluid flowing between the guide scraper 6 and the spiral flow channel 5 becomes stronger, and the fluid is guided by the guide scraper 6 to the inner side wall of the spiral flow channel 5 relative to the guide scraper 6, thereby flushing and cleaning the inner side wall of the spiral flow channel 5 relative to the guide scraper 6.

[0028] In some embodiments, the rotation angle of the guide blades 6 can be changed to adjust the impact position of the fluid after being diverted by the guide blades 6, thereby changing the flushing position relative to the inner wall of the guide blades 6 so that the flushing position can cover the left or right wall of the spiral flow channel 5. In addition, the coverage area can also be enhanced by changing the density of the guide blades 6. The density setting is a change in the number of guide blades 6, which is not described in detail here.

[0029] In some embodiments, the rotation structure of the guide blade 6 and the driving structure based on the rotation structure are configured as follows: The guide scraper 6 is rotated by an axis. Specifically, a rotating shaft provided at one end of the guide scraper 6 is used to rotate, wherein one end of the rotating shaft passes through the guide scraper 6. The rotating shaft is driven to rotate by an external driving structure, thereby further driving the guide scraper 6 to rotate.

[0030] In some embodiments, the shaft and the driven guide blade 6 are fitted together using a plug-in fit. Specifically, the shaft's outer wall has angular corners, such as a triangular or quadrangular prism. This allows the shaft to be vertically inserted into the guide blade 6, allowing the guide blade 6 to brake and rotate as the shaft rotates. Furthermore, the guide blade 6 is provided with a through-hole corresponding to the shaft's outer wall, where the inner wall of the through-hole has the same dimensions as the shaft's outer diameter.

[0031] Furthermore, to facilitate the rotation of the guide scraper 6, the inner wall of the spiral flow channel 5 is provided with a receiving groove that cooperates with the guide scraper 6, wherein 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 close to the spiral flow channel 5 has the same streamline distribution as the inner wall of the spiral flow channel 5. Specifically, it is structurally reflected as follows: the outer wall of the guide scraper 6 extends along the side wall of the spiral flow channel 5, and the length of the guide scraper 6 is the same as the width of the spiral flow channel 5, which avoids the guide scraper 6 obstructing the normal flow of the flow channel in the spiral flow channel 5 when the guide scraper 6 is set.

[0032] In this embodiment, in order to ensure that the guide scraper 6 can fully scrape the inner wall of the spiral flow channel 5, the vertical height of the guide scraper 6 is the same as the vertical height of the spiral flow channel 5. Specifically, the structural feature is that the depth of the receiving groove is the same as the vertical height of the spiral flow channel 5, so that the upper and lower side walls of the guide scraper 6 respectively fit the upper and lower inner walls of the spiral flow channel 5. Furthermore, as the guide scraper 6 rotates, impurities on the upper and lower inner walls of the spiral flow channel 5 are scraped off.

[0033] In this embodiment, the spiral flow channel 5 is formed by two sets of spiral side walls 50. Figure 2-Figure 6 The spiral inner diameters of the two sets of spiral side walls 50 are different. Due to the difference in inner diameters, a spiral flow channel gap is formed between the two sets of spiral side walls 50, thereby forming a spiral flow channel 5.

[0034] In some embodiments, based on the arrangement of the spiral side wall 50 and the rotating shaft, this embodiment further discloses a detachable assembly structure of the spiral side wall 50, the guide scraper 6 and the rotating shaft, specifically, wherein, with reference to Figure 7First, an anti-slip flange is provided at one end of the rotating shaft; secondly, the spiral side wall 50 is composed of an end wall and a cover, and the receiving groove is arranged on the end wall. The receiving groove is open at one end close to the cover. When the guide scraper 6 is placed, it is inserted from the open position. The cover and the spiral side wall 50 are of the same width as a whole, and the cover and the end wall are locked by multiple locking bolts.

[0035] It should be noted that the cover 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 receiving groove. Furthermore, the end of the rotating shaft, away from the anti-slip flange, is cylindrical. That is, the inner wall of the through-hole in the cover is the same as the outer diameter of the cylindrical end of the rotating shaft, ensuring that the rotating shaft can rotate relative to the cover. To ensure waterproofness, a waterproof layer can be provided on the outer wall of the cylindrical end of the rotating shaft.

[0036] Based on the improved structure of the spiral side wall 50, the guide blade 6 and the rotating shaft, the assembly process is as follows: The assembly process of the rotating shaft and the guide scraper 6 is as follows: the rotating shaft with the anti-drop flange is inserted along the through-hole of the guide scraper 6 to form an assembly A; The assembly process between assembly A and the end wall is as follows: Assembly A is placed into the receiving groove from the open position of the receiving groove on the end wall to form assembly B. It should be noted that during this process, to avoid the protruding anti-slip flange causing a gap between the guide scraper 6 and the receiving groove, a rotation groove is provided on the inner wall of the receiving groove away from the open side for rotating the anti-slip flange. The depth of the rotation groove is the same as the thickness of the anti-slip flange. The assembly process between assembly B and the cover is as follows: the cover is mounted against the inner wall of the side containing the open receiving slot. The mounting structure is removable and connected by bolts or other fasteners. During installation, the through-hole of the cover must pass through the cylindrical end structure of the rotating shaft, causing the rotating shaft to protrude from the cover, facilitating the subsequent drive mechanism to drive the rotating shaft for rotation. Once the cover is installed, the spiral sidewall 50, the guide blade 6, and the rotating shaft are integrated.

[0037] Based on the setting of the spiral side wall 50, the guide scraper 6 and the rotating shaft structure, in some embodiments, an external driving structure setting for driving the rotating shaft of the protruding cover is also disclosed: it is composed 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 is engaged 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, and the spiral setting is the same as the spiral shape of the spiral side wall 50. Then, as the rack is pulled, the rotating shaft on the same spiral side wall 50 rotates synchronously, thereby causing the guide scraper 6 on the same spiral side wall 50 to rotate at the same angle.

[0038] Furthermore, in some embodiments, a rack constraint track is provided for constraining the rack, wherein the shape of the rack constraint track is the same as the spiral shape of the spiral side wall 50, and the rack constraint track is fixed in the spiral microchannel heat exchanger, and there is no restriction or requirement on the fixing method and fixing position, wherein the rack constraint track is C-shaped, and the rack side wall is provided with a flexible soft guide rail, wherein the flexible soft guide rail can be made of plastic or other materials, and a slide rail for sliding the flexible soft guide rail is provided in the C-shaped rack constraint track, and the slide rail has the same spiral shape as the spiral side wall 50, wherein the rack is provided on the flexible soft guide rail, and the movement of the flexible soft guide rail is constrained by the slide rail in the rack constraint track, thereby further constraining the sliding trajectory of the rack.

[0039] In some embodiments, the rack is driven to slide along the rack constraint track by driving the flexible guide rail. The structure of driving the flexible guide rail can be composed of a linear drive component, a linear push rod or a cylinder component, or a winding component winding drum structure (not shown in the figure).

[0040] The present embodiment also discloses that the guide scrapers 6 are provided in two groups, which are respectively located on the left and right inner walls of the spiral flow channel 5. Such a setting has the following effects: 1. The scraping area of ​​the guide scrapers 6 can be increased. The guide scrapers 6 are provided on a single side wall of the spiral flow channel 5, and their scraping range is: the guide scrapers 6 are on a circular surface centered on the rotation axis. By adding guide scrapers 6 on the opposite sides, the scraping range of the guide scrapers 6 is increased; 2. The diversion direction can be adjusted, 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 flow channel 5 are provided by independent drive 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 same rack. The driving method is as follows: 1. The guide scraper 6 on the left side of the spiral flow channel 5 is driven separately, and the inner wall on the right side of the spiral flow channel 5 is flushed by the high-pressure liquid formed after the diversion; 2. The guide scraper 6 on the right side of the spiral flow channel 5 is driven separately, and the inner wall on the left side of the spiral flow channel 5 is flushed by the high-pressure liquid formed after the diversion; when the guide scrapers 6 on the left and right sides are adjusted at the same time, the flushing position can be further refined and controlled, and the flushing force after the diversion can be further adjusted.

[0041] In some embodiments, the two groups of guide scrapers 6 in the same spiral flow channel 5 are further limited. Specifically, the rotation center of the guide scrapers 6 on the inner walls on both sides of the same spiral flow channel 5 is located in the radial direction of the spiral flow channel 5. Such a setting can ensure that the guide scrapers 6 on the right and right sides relative to each other are used in coordination with each other to more finely adjust the flushing position; at the same time, it has no effect on the operation of the guide scrapers 6 on a single side wall.

[0042] A spiral microchannel heat exchanger with a self-cleaning flow guide structure further includes an intermediate plate 7, which improves the formation of the spiral flow channel 5. Specifically, the configuration is as follows: An intermediate plate 7 is further provided between the heat exchange plate 1 2 and the heat exchange plate 2 3 , and the spiral flow channel 5 is located on both sides of the intermediate plate 7 , wherein the heat exchange surface between fluid 1 and fluid 2 realizes heat exchange through the intermediate plate 7 .

[0043] Reference Figure 1 and Figure 8 The spiral flow channels 5 for fluid 1 and fluid 2 to flow are located on both sides of the middle plate 7 respectively.

[0044] Furthermore, based on the structural composition of the intermediate plate 7 and the spiral side wall 50 including the guide blade 6, the matching relationship and connection relationship between the two are as follows: The spiral side wall 50 is arranged on the heat exchange plate 1 2 or the heat exchange plate 2 3, and the spiral flow channel 5 of fluid 1 is composed of the heat exchange plate 1 2, the middle plate 7 and two adjacent spiral side walls 50; the spiral flow channel 5 of fluid 2 is composed of the heat exchange plate 2 3, the middle plate 7 and two adjacent spiral side walls 50.

[0045] In the prior art, the spiral flow channels 5 are arranged in groups from the inside out. In addition, the width of the spiral flow channels 5 is too small, resulting in the size of the guide blades 6 being too small, which affects the actual assembly. In addition, the spiral flow channels 5 are installed too densely, increasing the difficulty of installation. This embodiment makes structural improvements to the above problems. The specific improvements are as follows: The spiral side wall 50 slides vertically and linearly on the heat exchange plate 1 2 or the heat exchange plate 2 3, referring to Figure 8 According to the above technical improvements, when cleaning the spiral microchannel, multiple spiral microchannels can be merged and cleaned separately. The specific method can be referred to Figure 8 For example, after the two middle spiral sidewalls 50 are moved downward until they are flush with the sidewalls of heat exchange plate 1 2 or heat exchange plate 2 3, the width of the spiral flow channel 5 between heat exchange plate 1 2 or heat exchange plate 2 3 and the middle plate 7 increases, thereby facilitating the installation of the guide blade 6, thereby increasing the size of the guide blade 6 and facilitating assembly. However, the above technical improvement requires multiple cleaning operations, that is, the spiral sidewalls 50 that do not need to be cleaned are sequentially hidden downward, and the spiral sidewalls 50 that need to be cleaned are retained. As a result, the length of the guide blade 6 is actually the distance between the two spiral sidewalls 50 that need to be cleaned.

[0046] Preferably, in some embodiments, the length of the guide blade 6 is an integer multiple of the width of the spiral flow channel 5. Figure 8 Such an arrangement helps to make the length of the guide blades 6 equal, which further helps in the production of the guide blades 6.

[0047] Finally, it is necessary to add: In some embodiments, based on the setting of the driving structure, the driving force for the vertical linear sliding of the spiral side wall 50 can be synchronized. This process is opposite to the driving method when the guide blade 6 rotates. Specifically, when the gear rotates in one direction, the guide blade 6 is driven to rotate into the spiral flow channel 5; when the gear rotates in the other direction, the guide blade 6 is driven to rotate away from the spiral flow channel 5. Furthermore, the spiral side wall 50 is driven to slide vertically linearly by driving the rotating shaft. Furthermore, the structure of the upper gear and the rotating shaft is set as follows: The gear is rotatably sleeved on the outer wall of the cylindrical end of the rotating shaft. Preferably, the inner wall of the gear is symmetrically provided with two cylindrical protrusions, and the outer wall of the cylindrical end of the rotating shaft is provided with a guide groove that cooperates with the cylindrical protrusions. Figure 7 , wherein the guide chute consists of two parts, a horizontal chute and an oblique driving chute, wherein one end of the oblique driving chute is connected to one end of the horizontal chute.

[0048] Furthermore, the matching relationship between the upper gear and the rotating shaft is as follows: 1. When the gear drives the guide scraper 6 to rotate into the spiral flow 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 oblique drive groove until the cylindrical protrusion moves to the end of the horizontal slide groove away from the oblique drive groove. At this time, as the gear rotates, the resistance force of the cylindrical protrusion causes the guide scraper 6 to rotate, that is, to rotate into the spiral flow channel 5.

[0049] 2. When the gear drives the rotating shaft to drive the spiral side wall 50 to slide vertically linearly, the working process is as follows: the gear rotates in the opposite direction, that is, the rack pulls in the opposite direction, and the cylindrical protrusion moves along the horizontal slide groove relative to the oblique drive groove until the cylindrical protrusion moves to the connecting end of the horizontal slide groove and the oblique drive groove, and then slides along the oblique drive groove through the cylindrical protrusion as the gear rotates. 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, and the rotation direction is stable and will not move in the vertical direction. Then, as the gear rotates, the vertical component of the resistance force of the cylindrical protrusion against the inner wall of the oblique drive groove causes the rotating shaft to drive the spiral side wall 50 to move away from the middle plate 7, thereby completing the hiding of the spiral side wall 50 that does not need to be cleaned under the heat exchange plate 1 2 or the heat exchange plate 2 3.

[0050] It should be added that: in some embodiments, in order to solve the problem of gear rotation, when the cylindrical protrusion moves along the horizontal slide groove relative to the oblique drive groove, the guide scraper 6 is rotated and stored in the spiral side wall 50, and a spring is provided between the inner wall of the heat exchange plate 1 2 or the heat exchange plate 2 3 and the outer wall of the rotating shaft. Driven by the spring, the rotating shaft rotates, thereby causing the guide scraper 6 to be rotated and stored in the spiral side wall 50.

[0051] In addition, in addition to the structural improvements on the gears and the rotating shaft, the structure for driving the spiral side wall 50 to slide vertically linearly in this embodiment can also be composed of a separately provided vertical linear driving member, such as a cylinder or a push rod motor.

[0052] Finally, in this embodiment, an installation cavity structure is formed between the heat exchange plate 1 2 and the top cover plate 1 and between the heat exchange plate 2 3 and the bottom cover plate 4 , and the installation cavity is used to accommodate the driving structure and the gear rack of the driving spiral side wall 50 .

[0053] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A spiral microchannel heat exchanger with a self-cleaning flow guide structure, comprising a top cover plate (1), a heat exchange plate 1 (2), a heat exchange plate 2 (3) and a bottom cover plate (4), wherein the heat exchange plate 1 (2) and the heat exchange plate 2 (3) are provided with a spiral flow channel (5), characterized in that: At least one inner wall of the spiral flow channel (5) is provided with a guide scraper (6) that can rotate into the spiral flow channel (5).

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

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

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

5. The spiral microchannel heat exchanger with a self-cleaning flow-guiding structure according to claim 1, characterized in that: The guide scrapers (6) are provided on both inner walls of the spiral flow channel (5).

6. The spiral microchannel heat exchanger with a self-cleaning flow-guiding structure according to claim 5, characterized in that: The rotation centers of the guide scrapers (6) on the inner walls of both sides of the same spiral flow channel (5) are located in a radial direction extending outward from the center of the spiral flow channel (5).

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

8. The spiral microchannel heat exchanger with a self-cleaning flow-guiding structure according to claim 7, characterized in that: The spiral flow channels (5) are multiple groups, and the multiple groups of spiral flow channels (5) are arranged in sequence from the inside to the outside.

9. The spiral microchannel heat exchanger with a self-cleaning flow-guiding structure according to claim 8, characterized in that: The spiral flow channel (5) is formed by two groups of spiral side walls (50), and the spiral side walls (50) slide vertically and linearly on the heat exchange plate 1 (2) or the heat exchange plate 2 (3).

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

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