Heat exchanger and air conditioning system

Abstract

The utility model provides a kind of heat exchanger and air conditioning system, heat exchanger includes: multiple fins, multiple fins are spaced distribution;Heat exchange pipe, is arranged on multiple fins;Cleaning assembly is set between two adjacent fins, cleaning assembly includes sleeve and fan blade structure, sleeve is set on the outer periphery of heat exchange pipe, sleeve can rotate relative to heat exchange pipe, fan blade structure has connecting end, connecting end is connected with sleeve, connecting end extends along the radial direction of sleeve and extends outward, the side of fan blade structure close to fin has cleaning part, cleaning part is abutted with fin, to clean fin. The technical scheme of the utility model can solve the problem that the cleaning of the fins in related technology usually depends on regular manual cleaning and cannot be cleaned continuously in real time.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning system technology, and more specifically, to a heat exchanger and an air conditioning system. Background Technology

[0002] Finned heat exchangers, widely used in air conditioning units, are favored for their high heat exchange efficiency as their core heat exchange component. However, when exposed to the outdoor environment for extended periods, the fins of these heat exchangers easily attract dust and impurities from the air, forming a thick layer of ash.

[0003] In related technologies, fin cleaning usually relies on periodic manual cleaning, which is not only time-consuming and labor-intensive, but also cannot be cleaned continuously in real time. This not only significantly reduces the heat exchange efficiency of the heat exchanger, but may also cause corrosion problems, further affecting its performance and service life. Utility Model Content

[0004] This invention provides a heat exchanger and an air conditioning system to solve the problem that the cleaning of fins in related technologies usually relies on periodic manual cleaning, which cannot be done continuously in real time.

[0005] To address the aforementioned problems, according to one aspect of this utility model, a heat exchanger is provided, comprising: a plurality of fins spaced apart; a heat exchange tube passing through the plurality of fins; and a cleaning assembly disposed between two adjacent fins. The cleaning assembly includes a sleeve and a fan blade structure. The sleeve is fitted around the outer periphery of the heat exchange tube and is rotatable relative to the heat exchange tube. The fan blade structure has a connecting end connected to the sleeve and extending radially outward along the sleeve. The side of the fan blade structure near the fin has a cleaning portion that abuts against the fin to clean it.

[0006] Furthermore, the fan blade structure includes multiple blades, which are spaced apart around the outer periphery of the sleeve along the circumference of the heat exchange tube. The blades have a connecting end and a free end arranged opposite to each other along the radial direction of the heat exchange tube. The connecting end is connected to the sleeve, and the cleaning part is located on the side of the blade facing the fins and extends from the connecting end to the free end.

[0007] Furthermore, the cross-sectional area of ​​the cleaning section along the circumference of the heat exchange tube gradually decreases from the blade to the fin.

[0008] Furthermore, the blades and the cleaning section are separate structures, with the hardness of the cleaning section being less than that of the blades.

[0009] Furthermore, the blade has a first section and a second section connected in sequence along the radial direction of the heat exchange tube. The first section is fixedly connected to the outer wall of the sleeve. The end of the first section near the sleeve forms a connecting end. The second section is located on the side of the first section away from the sleeve. The end of the second section away from the first section forms a free end. The second section and the first section have an included angle α, where 0 < α ≤ 45°.

[0010] Furthermore, the tangents of the sleeves connecting the blades have an included angle α, where 80°≤α≤100°.

[0011] Furthermore, the side of the cleaning section 33 closest to the fin 10 is inclined toward the fin, and the angle between the side of the cleaning section closest to the fin and the end face of the sleeve is b, where 0° < b ≤ 10°.

[0012] Furthermore, the cleaning assembly includes multiple fan blade structures arranged along the axial direction of the heat exchange tube on the outer periphery of the sleeve, with at least two fan blade structures located at both ends of the sleeve in the axial direction to clean the fins.

[0013] Furthermore, the cleaning assembly includes two sleeves and multiple fan blade structures, with at least one fan blade structure provided on each sleeve, and the two sleeves are spaced apart along the axial direction of the heat exchange tube.

[0014] Furthermore, multiple fins divide the heat exchange tube into multiple heat exchange sections, which are distributed at intervals along the radial and axial directions of the heat exchange tube. A ventilation channel is formed between two adjacent fins. The fins have an air inlet side and an air outlet side corresponding to the ventilation channel. A cleaning component is provided on at least the heat exchange section on the air inlet side.

[0015] Furthermore, the sleeve includes an outer cylinder and a rotating assembly. The rotating assembly is disposed between the heat exchange tube and the outer cylinder. The outer cylinder is rotatably connected to the heat exchange tube through the rotating assembly. The fan blade structure is disposed on the outer periphery of the outer cylinder.

[0016] Furthermore, the rotating assembly includes: an inner cylinder, sleeved on the outer periphery of the heat exchange tube, the inner cylinder being fixedly connected to the heat exchange tube; and a rotating structure, disposed between the inner cylinder and the outer cylinder, the rotating structure having a first rotating part and a second rotating part, the first rotating part and the second rotating part being able to rotate relative to each other, the first rotating part being correspondingly disposed to the inner cylinder, the second rotating part being correspondingly disposed to the outer cylinder, and the outer cylinder being rotatably connected to the inner cylinder through the rotating structure.

[0017] Furthermore, the rotating structure includes: multiple limiting grooves, which are spaced apart along the circumference of the heat exchange tube on the side wall of the inner cylinder facing the outer cylinder, and the limiting grooves form a first rotating part; multiple balls, which are arranged one-to-one with the multiple limiting grooves, some of the balls are rotatably disposed in the limiting grooves, and the part of the balls outside the limiting grooves slides against the inner side wall of the outer cylinder, and the balls form a second rotating part.

[0018] According to another aspect of the present invention, an air conditioning system is provided, which includes the heat exchanger described above.

[0019] In this design, the fluid flows between the fins along the width of the fins. The circumferential direction of the sleeve is parallel to the width direction of the fins, and the extension direction of the connecting end forms an angle with the circumferential direction of the sleeve. When fluid passes through the fins and the flow velocity reaches a preset value, the fluid impacts part of the fan blade structure, pushing the fan blade structure and causing the sleeve to rotate relative to the heat exchange tube. This causes the cleaning part to rotate relative to the fins, scraping away dust from the fins and achieving surface cleaning without disassembling the heat exchanger. This allows for real-time cleaning and maintenance, effectively preventing dust accumulation on the fins, significantly reducing the risk of fin corrosion, and extending the service life of the heat exchanger. Furthermore, compared to existing heat exchangers that require periodic manual cleaning, the cleaning component of this application can clean the fins at any time, reducing reliance on manual cleaning, improving the timeliness and convenience of fin cleaning, reducing maintenance time, and saving maintenance costs. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of the cleaning component provided in an embodiment of the present invention is shown;

[0022] Figure 2 A partial cross-sectional view of a cleaning assembly provided in an embodiment of the present invention is shown;

[0023] Figure 3 A partial structural schematic diagram of a heat exchanger provided in an embodiment of the present invention is shown;

[0024] Figure 4 A partial cross-sectional view of a heat exchanger provided in an embodiment of the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Fins; 101. Inlet side; 102. Outlet side;

[0027] 20. Heat exchanger tubes;

[0028] 30. Cleaning component; 31. Sleeve; 311. Outer cylinder; 312. Inner cylinder; 313. Ball bearing; 32. Fan blade structure; 33. Cleaning section; 321. Blade; 3211. Connecting end; 3212. Free end; 3213. First section; 3214. Second section. Detailed Implementation

[0029] The technical solutions in at least one embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one embodiment is merely illustrative and is not intended to limit this application or its applications. Other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are all within the scope of protection of this application.

[0030] like Figures 1 to 4 As shown, an embodiment of this utility model provides a heat exchanger, which includes multiple fins 10, heat exchange tubes 20, and a cleaning assembly 30. The multiple fins 10 are spaced apart within the heat exchanger, and the heat exchange tubes 20 pass through the multiple fins 10. The cleaning assembly 30 is disposed between two adjacent fins 10 and includes a sleeve 31 and a fan blade structure 32. The sleeve 31 is fitted around the outer periphery of the heat exchange tubes 20, and the axial direction of the sleeve 31 is parallel to the axial direction of the heat exchange tubes 20. The sleeve 31 is rotatable relative to the heat exchange tubes 20. The fan blade structure 32 has a connecting end 3211, which is connected to the sleeve 31 and extends radially outward along the sleeve 31. The side of the fan blade structure 32 closest to the fins 10 has a cleaning portion 33, which abuts against the fins 10 to clean them.

[0031] In this embodiment, the connecting end 3211 extends along the axial direction of the sleeve 31, so that the contact area between the fan blade structure 32 and the fluid is large, and the fan blade structure 32 can be driven to rotate with a smaller flow rate.

[0032] In this design, the fluid between the fins 10 flows along the width direction of the fins 10. The circumferential direction of the sleeve 31 is parallel to the width direction of the fins 10, and the extension direction of the connecting end 3211 forms an angle with the circumferential direction of the sleeve 31. Thus, when fluid passes through the fins and the flow rate reaches a preset value, the fluid will impact part of the fan blade structure 32 and push the fan blade structure 32, thereby causing the sleeve 31 to rotate relative to the heat exchange tube 20. This causes the cleaning part 33 to rotate relative to the fins 10 and scrape off the dust on the fins 10, thereby achieving the cleaning of the surface of the fins 10 without disassembling the heat exchanger. At the same time, it can perform cleaning and maintenance in real time, effectively preventing the accumulation of dust on the fins 10, thus significantly reducing the corrosion risk of the fins 10 and extending the service life of the heat exchanger. Meanwhile, compared to heat exchangers in the prior art that require regular manual cleaning, the cleaning component 30 of this application can clean the fins 10 at any time, reducing the reliance on manual cleaning, improving the timeliness and convenience of cleaning the fins 10, reducing maintenance time, and saving maintenance costs.

[0033] In this application, the fluid is supplied by a fan. When the cleaning component 30 is performing heat exchange in the heat exchanger, the fluid velocity is less than a preset value, so it will not drive the fan blade structure 32 to rotate and clean the fins 10. After the heat exchanger finishes its heat exchange operation, the fan is turned on to introduce fluid with a velocity greater than the preset value, which will then drive the fan blade structure to rotate. The preset value for the fluid velocity is not limited; it only needs to be greater than the velocity during operation and can be selected and adjusted according to cleaning requirements and actual working conditions.

[0034] like Figure 1 As shown, the fan blade structure 32 includes multiple blades 321, which are spaced apart around the outer periphery of the sleeve 31 along the circumference of the heat exchange tube 20. Each blade 321 has a connecting end 3211 and a free end 3212 arranged opposite to each other along the radial direction of the heat exchange tube 20. The connecting end 3211 is connected to the sleeve 31. The cleaning part 33 is disposed on the side of the blade 321 facing the fin 10 and extends from the connecting end 3211 to the free end 3212. This increases the contact area between the cleaning part 33 and the fin 10, expands the cleaning range of the cleaning component 30, improves the cleaning effect of the cleaning component 30, and also increases the connection area between the cleaning part 33 and the blade 321, thereby enhancing the structural strength of the cleaning component 30.

[0035] It is understandable that "multiple" refers to two or more quantities, that is, multiple blades 321 include two or more quantities of blades 321.

[0036] In this embodiment, the fan blade structure 32 includes four blades 321, which are evenly distributed around the sleeve 31. This makes the force on the cleaning component 30 more uniform and allows it to be driven by fluid from multiple directions. The fluid can drive the fan blade structure 32 to rotate with a small flow rate, thus reducing the energy consumption of cleaning.

[0037] Furthermore, the cross-sectional area of ​​the cleaning section 33 along the circumference of the heat exchange tube 20 gradually decreases from the blade 321 to the fin 10. In this way, the cleaning section 33 can fit more closely to the surface or gap of the fin 10 near the end of the fin 10, clean the uneven parts of the fin 10 surface, reduce the occurrence of cleaning dead corners, improve the cleaning efficiency of difficult-to-clean areas, and enhance the cleaning ability of the cleaning section 33.

[0038] In this application, the blade 321 and the cleaning section 33 are separate structures, with the cleaning section 33 having a lower hardness than the blade 321. The softer material of the cleaning section 33 allows it to bend or avoid obstacles more easily, and it is gentler when contacting the fins 10, avoiding scratches or deformation that might occur to the fins when removing dust and dirt from harder materials. It also better adapts to the minute irregularities on the surface of the fins 10, reaching deep into hard-to-clean crevices, improving the thoroughness and efficiency of cleaning. This not only increases cleaning flexibility but also reduces wear between the cleaning section 33 and the fins 10 or other components, extending the overall service life of the cleaning assembly 30 and the heat exchanger.

[0039] In this embodiment, the blade 321 is made of metal and can be integrally formed with the sleeve 31. The cleaning part 33 can be made of materials such as plastic, nylon, cotton, or a brush.

[0040] In this design, the tangents of the sleeve 31 connecting the blades 321 and their connecting ends 3211 form an angle α, where 80° ≤ α ≤ 100°. When α is less than 80° or greater than 100°, the force decomposed along the surface of the blades 321 increases when the fluid blows onto them, resulting in a decrease in the force acting perpendicularly on the blades 321. This leads to a smaller effective windward area (i.e., the projected area of ​​the blades 321 along the fluid flow direction) when the blades 321 rotate, requiring a higher flow velocity to propel them, resulting in higher energy consumption. This application sets α within the range of 80° ≤ α ≤ 100°, allowing the blades 321 to have a larger effective windward area, making them easier to propel and saving energy. α can be set to 80°, 90°, or 100°, etc.

[0041] like Figure 1As shown, the blade 321 has a first section 3213 and a second section 3214 connected sequentially along the radial direction of the heat exchange tube 20. The first section 3213 is fixedly connected to the outer wall of the sleeve 31. The end of the first section 3213 near the sleeve 31 forms a connecting end 3211. The second section 3214 is located on the side of the first section 3213 away from the sleeve 31. The end of the second section 3214 away from the first section 3213 forms a free end 3212. The second section 3214 and the first section 3213 have an included angle α, where 0°<α≤45°. If α equals 0°, there is no angle between the first segment 3213 and the second segment 3214, resulting in greater fluid flow resistance and requiring a higher flow velocity to drive the fan blade structure 32 to rotate, leading to higher energy consumption. If α is greater than 45°, the angle between the first segment 3213 and the second segment 3214 is large, which can easily cause fluid to be trapped between the inner walls of the first segment 3213 and the second segment 3214, increasing the fluid flow resistance, or the fluid may flow directly along the outer surface of the first segment 3213 or the second segment 3214, resulting in a small effective windward area for the blade 321, making it difficult for the fluid to generate sufficient driving force for the blade 321. This application sets α to 0° < α ≤ 45°, which can reduce the fluid flow resistance and ensure that the blade 321 has a large effective windward area, ensuring smooth cleaning operations. α can be set to 10°, 15°, or 30°, etc.

[0042] In this embodiment, the first segment 3213 extends radially along the sleeve 31, meaning the length direction of the blade 321 is the same as the radial direction of the sleeve 31. When there are multiple blades 321, the bending direction of the multiple second segments 3214 and the included angle with the first segment 3213 are the same. This allows the second segments 3214 of different blades 321 to experience different forces, making the fan blade structure 32 more efficient in driving.

[0043] In other embodiments, the bending direction of the plurality of second segments 3214 and the included angle between the plurality of second segments 3214 and the plurality of first segments 3213 are different.

[0044] In some embodiments of this application, the blade 321 extends along the axial direction of the sleeve 31, that is, the length direction of the blade 321 is the same as the axial direction of the sleeve 31.

[0045] In other embodiments of this application, the blade 321 may also be configured as a flat plate structure, a spiral structure, a curved surface structure, or a multi-faceted structure, etc.

[0046] like Figure 1 As shown, there is an arc transition section between the first segment 3213 and the second segment 3214 to reduce stress concentration at the connection between the first segment 3213 and the second segment 3214 and improve the structural strength of the blade 321.

[0047] In an optional embodiment of this application, the side of the cleaning part 33 near the fin 10 is inclined from the end of the sleeve 31 toward the fin 10. This can increase the contact force between the cleaning part 33 and the fin 10, and help the cleaning part 33 to form a scraping force on the surface of the fin 10 when rotating, which can more effectively remove accumulated dust and improve the cleaning effect.

[0048] Specifically, the angle between the side of the cleaning section 33 near the fin 10 and the end face of the sleeve 31 is b, where 0° < b ≤ 10°. If b is greater than 10°, the cleaning section 33 will exert greater pressure on the fin 10, which will increase the friction between the cleaning section 33 and the fin 10, making it difficult for the blade 321 to rotate. During rotation, it is also easy to damage the surface of the fin 10, affecting the service life of the fin 10.

[0049] In other embodiments, the side of the cleaning section 33 near the fin 10 extends in the same direction as the end face of the sleeve 31.

[0050] In another embodiment, the cleaning part 33 protrudes from the end face of the sleeve 31 on the side near the fin 10 to increase the contact force between the cleaning part 33 and the fin 10.

[0051] In this application, the cleaning assembly 30 includes multiple fan-blade structures 32, which are arranged along the axial direction of the heat exchange tube 20 on the outer periphery of the sleeve 31. At least two fan-blade structures 32 are located at both ends of the sleeve 31 along the axial direction to clean the fins 10. Thus, fan-blade structures 32 are provided at both ends of the sleeve 31 along the axial direction, enabling the cleaning assembly 30 to achieve double-sided cleaning, adapting to multi-fin structures, and improving the applicability of the cleaning assembly 30.

[0052] It is understandable that the multiple fan blade structures 32 include two or more fan blade structures 32.

[0053] In this embodiment, the cleaning component 30 includes two fan blade structures 32, which are located at the two ends of the sleeve 31 in the axial direction.

[0054] In some embodiments, the cleaning component 30 includes a fan blade structure 32.

[0055] In other embodiments, the cleaning component 30 includes three or more fan blade structures 32. Except for the fan blade structures 32 located at both ends of the sleeve 31 in the axial direction, the remaining fan blade structures 32 are located in the middle of the sleeve 31 to increase the effective windward area of ​​the cleaning component 30 and the fluid, making it easier to drive the sleeve 31 to rotate.

[0056] like Figure 3 and Figure 4As shown, multiple fins 10 are arranged at intervals along the extension direction of the heat exchange tube 20. The multiple fins 10 divide the heat exchange tube 20 into multiple heat exchange sections. The multiple heat exchange sections are distributed at intervals along the radial and axial directions of the heat exchange tube 20, respectively. A ventilation channel is formed between two adjacent fins 10. The fins 10 have an air inlet side 101 and an air outlet side 102 corresponding to the ventilation channel.

[0057] In this embodiment, each heat exchange section is provided with a cleaning component 30 to clean the surface of the fins 10 at both ends of the heat exchange section.

[0058] In other embodiments, a cleaning component 30 is provided at least on the heat exchange section located on the air inlet side 101. Since the fins 10 have a high dust content on the air inlet side 101, this arrangement improves the targeting and efficiency of cleaning while reducing the manufacturing cost of the cleaning component 30.

[0059] In this embodiment, the cleaning component 30 includes a sleeve 31 that extends axially along the heat exchange tube 20.

[0060] In some alternative embodiments, the cleaning assembly 30 includes two sleeves 31 and a plurality of fan blade structures 32, with at least one fan blade structure 32 provided on each sleeve 31 for cleaning the fins 10, and the two sleeves 31 are spaced apart along the axial direction of the heat exchange tube 20. This reduces the amount of material required for processing the cleaning assembly 30 and lowers its manufacturing cost.

[0061] like Figure 2 As shown, the sleeve 31 includes an outer cylinder 311 and a rotating assembly. The rotating assembly is disposed between the heat exchange tube 20 and the outer cylinder 311. The outer cylinder 311 is rotatably connected to the heat exchange tube 20 through the rotating assembly. The fan blade structure 32 is disposed on the outer periphery of the outer cylinder 311. The rotating assembly can reduce the rigid contact between the outer cylinder 311 and the heat exchange tube 20, reduce the friction between the outer cylinder 311 and the heat exchange tube 20, reduce the driving force required for the cleaning process, thereby reducing energy consumption, and at the same time, it can reduce the noise and vibration generated by the cleaning assembly 30 during operation.

[0062] Specifically, the rotating assembly includes an inner cylinder 312 and a rotating structure. The inner cylinder 312 is sleeved around the outer periphery of the heat exchange tube 20 and is fixedly connected to the heat exchange tube 20. The rotating structure is disposed between the inner cylinder 312 and the outer cylinder 311, and the outer cylinder 311 is rotatably connected to the inner cylinder 312 through the rotating structure. This avoids direct contact between the rotating structure and the outer cylinder 311 and the heat exchange tube 20, reducing damage to the heat exchange tube 20 during the operation of the cleaning assembly 30.

[0063] In this embodiment, the inner cylinder 312 and the heat exchange tube 20 are interference-fitted through a tube expansion process.

[0064] In other embodiments, the inner cylinder 312 and the heat exchange tube 20 can be fixedly connected by means of bonding, snap-fit ​​connection or other fixing methods.

[0065] like Figure 2 As shown, the rotating structure includes multiple limiting grooves and multiple balls 313. The multiple limiting grooves are spaced apart along the circumference of the heat exchange tube 20 on the side wall of the inner cylinder 312 facing the outer cylinder 311. Each ball 313 corresponds to one of the multiple limiting grooves. Some balls 313 are rotatably disposed within the limiting grooves, while the portions of the balls 313 outside the limiting grooves slide against the inner side wall of the outer cylinder 311. The balls 313 maintain rolling contact with both the outer cylinder 311 and the inner cylinder 312, achieving low-friction rotation of the outer cylinder 311 relative to the inner cylinder 312. This reduces energy loss during the cleaning process, ensures that the fan blade structure 32 can rotate with a smaller driving force, and improves cleaning efficiency.

[0066] The rotating structure has a first rotating part and a second rotating part, which can rotate relative to each other. The first rotating part is correspondingly arranged with the inner cylinder 312, and the second rotating part is correspondingly arranged with the outer cylinder 311.

[0067] In some embodiments, the rotating structure includes an annular groove and an annular protrusion adapted thereto. The annular groove is disposed on one of the outer sidewall of the inner cylinder 312 along the circumferential direction or the inner sidewall of the outer cylinder 311 along the circumferential direction, and the annular protrusion is disposed on the other of the outer sidewall of the inner cylinder 312 along the circumferential direction or the inner sidewall of the outer cylinder 311 along the circumferential direction. The annular protrusion is located in the annular groove and rotates along the annular groove. One of the annular groove or the annular protrusion forms a first rotating part, and the other of the annular groove or the annular protrusion forms a second rotating part.

[0068] In another embodiment, the rotating structure is a bearing, the inner ring of the bearing is interference-fitted with the outer circumference of the inner cylinder 312, the outer cylinder 311 is sleeved on the outer ring of the bearing, the outer ring of the bearing is interference-fitted with the inner sidewall of the outer cylinder 311, the inner ring of the bearing forms a first rotating part, and the outer ring of the bearing forms a second rotating part.

[0069] According to another embodiment of the present invention, an air conditioning system is provided, which includes the heat exchanger in the above embodiment. The air conditioning system can solve the problem of easy dust accumulation on the heat exchanger fins and inability to clean them continuously in real time by means of the cleaning component 30 in the heat exchanger, thereby improving the heat exchange efficiency and reliability of the air conditioning system and reducing the maintenance cost and energy consumption of the air conditioning system.

[0070] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0071] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification.

[0072] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0074] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0075] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0076] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

Claims

1. A heat exchanger, characterized in that, The heat exchanger includes: Multiple fins (10) are spaced apart; Heat exchange tubes (20) are installed on the plurality of said fins (10); A cleaning assembly (30) is disposed between two adjacent fins (10). The cleaning assembly (30) includes a sleeve (31) and a fan blade structure (32). The sleeve (31) is fitted around the outer periphery of the heat exchange tube (20) and is rotatable relative to the heat exchange tube (20). The fan blade structure (32) has a connecting end (3211) connected to the sleeve (31) and extending radially outward along the sleeve (31). The side of the fan blade structure (32) near the fin (10) has a cleaning part (33) that abuts against the fin (10) to clean the fin (10).

2. The heat exchanger according to claim 1, characterized in that, The fan blade structure (32) includes a plurality of blades (321), which are spaced apart along the circumference of the heat exchange tube (20) on the outer periphery of the sleeve (31). Each blade (321) has a connecting end (3211) and a free end (3212) arranged opposite to each other along the radial direction of the heat exchange tube (20). The connecting end (3211) is connected to the sleeve (31). The cleaning part (33) is disposed on the side of the blade (321) facing the fin (10) and extends from the connecting end (3211) to the free end (3212).

3. The heat exchanger according to claim 2, characterized in that, The cross-sectional area of ​​the cleaning section (33) along the circumference of the heat exchange tube (20) gradually decreases from the blade (321) to the fin (10).

4. The heat exchanger according to claim 2, characterized in that, The blade (321) and the cleaning part (33) are separate structures, and the hardness of the cleaning part (33) is less than that of the blade (321).

5. The heat exchanger according to claim 2, characterized in that, The blade (321) has a first segment (3213) and a second segment (3214) connected in sequence along the radial direction of the heat exchange tube (20). The first segment (3213) is fixedly connected to the outer wall of the sleeve (31). The end of the first segment (3213) near the sleeve (31) forms the connecting end (3211). The second segment (3214) is located on the side of the first segment (3213) away from the sleeve (31). The end of the second segment (3214) away from the first segment (3213) forms the free end (3212). The second segment (3214) and the first segment (3213) have an included angle α, where 0° < α ≤ 45°.

6. The heat exchanger according to claim 2, characterized in that, The tangents of the sleeve (31) connected to the blade (321) and the connecting end (3211) of the blade (321) have an included angle α, where 80°≤α≤100°.

7. The heat exchanger according to claim 2, characterized in that, The cleaning part (33) is inclined from the end of the sleeve (31) toward the fin (10) on the side near the fin (10), and the angle between the side of the cleaning part (33) near the fin (10) and the end face of the sleeve (31) is b, 0°<b≤10°.

8. The heat exchanger according to claim 1, characterized in that, The cleaning assembly (30) includes a plurality of fan blade structures (32) arranged along the axial direction of the heat exchange tube (20) on the outer periphery of the sleeve (31), with at least two fan blade structures (32) located at both ends of the sleeve (31) in the axial direction to clean the fins (10).

9. The heat exchanger according to claim 1, characterized in that, The cleaning assembly (30) includes two sleeves (31) and a plurality of fan blade structures (32), with at least one fan blade structure (32) provided on each sleeve (31), and the two sleeves (31) are spaced apart along the axial direction of the heat exchange tube (20).

10. The heat exchanger according to claim 1, characterized in that, The multiple fins (10) divide the heat exchange tube (20) into multiple heat exchange sections. The multiple heat exchange sections are distributed at intervals along the radial and axial directions of the heat exchange tube (20). A ventilation channel is formed between two adjacent fins (10). The fins (10) have an air inlet side (101) and an air outlet side (102) corresponding to the ventilation channel. The cleaning component (30) is provided on at least the heat exchange section located on the air inlet side (101).

11. The heat exchanger according to claim 1, characterized in that, The sleeve (31) includes an outer cylinder (311) and a rotating assembly. The rotating assembly is disposed between the heat exchange tube (20) and the outer cylinder (311). The outer cylinder (311) is rotatably connected to the heat exchange tube (20) through the rotating assembly. The fan blade structure (32) is disposed on the outer periphery of the outer cylinder (311).

12. The heat exchanger according to claim 11, characterized in that, The rotating assembly includes: The inner cylinder (312) is sleeved on the outer periphery of the heat exchange tube (20), and the inner cylinder (312) is fixedly connected to the heat exchange tube (20); A rotating structure is disposed between the inner cylinder (312) and the outer cylinder (311). The rotating structure has a first rotating part and a second rotating part. The first rotating part and the second rotating part can rotate relative to each other. The first rotating part is disposed corresponding to the inner cylinder (312), and the second rotating part is disposed corresponding to the outer cylinder (311). The outer cylinder (311) is rotatably connected to the inner cylinder (312) through the rotating structure.

13. The heat exchanger according to claim 12, characterized in that, The rotating structure includes: Multiple limiting grooves are spaced apart along the circumference of the heat exchange tube (20) on the side wall of the inner cylinder (312) facing the outer cylinder (311), and the limiting grooves form the first rotating part; Multiple balls (313) are provided, and each ball (313) is corresponding to a multiple limiting groove. Some of the balls (313) are rotatably disposed in the limiting groove. The part of the ball (313) located outside the limiting groove slides against the inner wall of the outer cylinder (311). The ball (313) forms the second rotating part.

14. An air conditioning system, characterized in that, The air conditioning system includes the heat exchanger described in any one of claims 1 to 13.

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