Modularized intelligent distribution box based on liquid cooling circulation

Abstract

The invention relates to the field of intelligent distribution boxes, and discloses a modularized intelligent distribution box based on liquid cooling circulation, which comprises a box body and electrical elements arranged in the box body, and a liquid cooling piece is arranged in the box body; the liquid cooling piece is communicated with a circulating liquid supply mechanism buried underground; the box body is provided with a scraping mechanism for scraping liquid from the liquid-cooled part, and the liquid scraped by the scraping mechanism is discharged out of the box body; the scraping mechanism comprises a magnetic ring, and the magnetic ring magnetically acts on liquid in the liquid cooling part; a rotational flow piece which moves along with the movement of the magnetic ring is arranged in the liquid cooling piece, and the rotational flow piece moves along with the movement to scrape the inner wall of the liquid cooling piece. Condensate water on the surface of the heat exchange pipe is removed through the scraping mechanism, and the humidity in the box is controlled through inclined design of the shunting box and the collecting box, guide of the protection plate and the discharge port, so that heat exchange efficiency reduction and electric appliance insulation risks are avoided; the external scraping shell and the internal rotational flow piece are linked through the magnetic ring, the inside and outside of the pipe are synchronously cleaned, a magnetic field changes mineral crystal forms to reduce scale, turbulence scouring keeps clean, and the heat exchange effect is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent distribution boxes, and more particularly to a modular intelligent distribution box based on liquid cooling circulation. Background Art

[0002] The biggest difference between smart distribution boxes and traditional distribution boxes is whether they have the ability of automation and intelligent monitoring. Traditional distribution boxes can only realize basic switch control functions and cannot monitor and remotely control the operating status of power equipment in real time. When data such as current and voltage exceed the standard, they cannot issue warnings and take measures in time, resulting in damage to power equipment and instability of the power system. At the same time, ordinary distribution boxes lack real-time collection and analysis of power system data and cannot effectively save energy and optimize management. In contrast, smart distribution boxes have powerful intelligent regulation functions in terms of automation control, real-time power monitoring, remote control, energy-saving optimization, etc.

[0003] Existing smart distribution boxes integrate a large number of electrical components and generate continuous heat during operation. Some smart distribution boxes route cooling pipes in a circuitous manner within the box to remove heat through liquid cooling. However, when the temperature difference between the air inside the box and the surface of the low-temperature cooling pipes is too large, water vapor in the air easily condenses into droplets on the pipe walls. This forms a water film, significantly reducing the heat exchange efficiency between the cooling pipes and the air, and increases the humidity inside the box, threatening electrical insulation and equipment safety. Summary of the Invention

[0004] The present invention provides a modular intelligent distribution box based on liquid cooling cycle, which solves the technical problem in the related art that air liquefies on the cooling pipe, thereby reducing the heat exchange efficiency and threatening the insulation.

[0005] The present invention provides a modular intelligent distribution box based on liquid cooling cycle, comprising a box body and electrical components arranged in the box body, wherein a liquid cooling element is provided inside the box body; The liquid cooling element is connected to a circulating liquid supply mechanism buried underground; The box body is provided with a scraping mechanism for scraping liquid from the liquid cooling element, and the liquid scraped by the scraping mechanism is discharged from the box body; The scraping mechanism includes a magnetic ring, which magnetically acts on the liquid in the liquid cooling element; A swirl component is provided in the liquid cooling component and moves along with the movement of the magnetic ring. The swirl component moves along to scrape the inner wall of the liquid cooling component.

[0006] As a further optimization solution of the present invention, the liquid cooling component includes a diverter box, a heat exchange tube and a collection box. The diverter box and the collection box are installed inside the box body, and the diverter box is unidirectionally connected to the collection box through the heat exchange tube.

[0007] As a further optimization solution of the present invention, the diversion box is arranged in parallel with the collection box and is inclined toward one side of the box body to form a diversion angle for scraping liquid.

[0008] As a further optimization solution of the present invention, one-way valves are provided at the connection points between the two ends of the heat exchange tube and the diversion box and the collection box respectively.

[0009] As a further optimization scheme of the present invention, the circulating liquid supply mechanism includes a circulating pump, a liquid supply pipe, a recovery pipe and a water tank. The liquid inlet end of the circulating pump extends into the interior of the water tank, the liquid discharge end of the circulating pump is connected to the diversion box through the liquid supply pipe, and the collecting box is connected to the water tank through the recovery pipe.

[0010] As a further optimization scheme of the present invention, the scraping mechanism also includes a scraping shell and a driving member. There are multiple scraping shells, which are slidably mounted on the corresponding heat exchange tubes respectively, and the multiple scraping shells are connected by connecting members. The driving member is installed on the box body, and the driving end of the driving member drives the scraping shell to move along the length direction of the heat exchange tube. The magnetic ring is mounted on the inside of the scraping shell.

[0011] As a further optimization solution of the present invention, the top and bottom of the scraper shell are both bucket-shaped and respectively adapted to the inclinations of the diversion box and the collection box.

[0012] As a further optimization solution of the present invention, the swirl element includes a scraper ring and axial flow blades. The scraper ring is slidably arranged inside the heat exchange tube and is adsorbed by the magnetic ring. The axial flow blades are rotatably arranged inside the scraper ring.

[0013] As a further optimization solution of the present invention, symmetrical guard plates are installed on both sides of the top of the collection box along its length direction, both ends of the guard plates are connected to the inner wall of the box, and a discharge outlet is opened in the box at the connection with the collection box.

[0014] As a further optimization solution of the present invention, a mounting ring is sleeved on the middle part of the heat exchange tube, and a spoiler blade is rotatably provided on the middle part of the mounting ring.

[0015] The beneficial effects of the present invention are: 1. The modular intelligent distribution box based on liquid cooling cycle described in the present invention uses a scraping mechanism to mechanically scrape condensed water from the surface of the heat exchange tube. Combined with the inclined design of the diversion box and the collection box and the directional diversion of the guard plate and the discharge port, the humidity inside the box is controlled to prevent the condensed water from forming a water film that reduces the heat exchange efficiency. At the same time, the threat of high humidity to the insulation performance of electrical components is eliminated, and the risk of short circuit and leakage is greatly reduced.

[0016] 2. The modular intelligent distribution box based on liquid cooling cycle described in the present invention realizes the simultaneous "external scraping of condensed water + internal scraping of dirt" through the linkage of the external scraper shell and the internal swirl element through the magnetic ring, mechanically removes the attachment inside and outside the heat exchange tube, and the magnetic field of the magnetic ring changes the crystal form of minerals in the coolant, reduces the deposition of hard scale and peels off old scale. Combined with the turbulent scouring generated by the axial flow blades and the spoiler blades, the heat exchange tubes can be kept clean for a long time, maintaining the heat exchange effect.

[0017] 3. The modular intelligent distribution box based on liquid cooling cycle described in the present invention evenly distributes low-temperature coolant to multiple heat exchange tubes through a diverter box, avoiding the problem of insufficient local heat dissipation caused by the heating of the coolant in traditional circuitous pipelines, and ensuring balanced temperature in various areas of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a modular intelligent distribution box based on liquid cooling cycle proposed in the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of a box in a modular intelligent distribution box based on liquid cooling cycle proposed by the present invention.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the heat exchange tube in a modular intelligent distribution box based on liquid cooling cycle proposed by the present invention.

[0021] Figure 4 for Figure 3 Schematic diagram of part of the structure.

[0022] Figure 5 This is a side structural schematic diagram of a heat exchange tube in a modular intelligent distribution box based on liquid cooling cycle proposed by the present invention.

[0023] In the picture: 1. Box body; 101. Discharge outlet; 2. Electrical components; 3. Liquid cooling unit; 31. Diverter box; 32. Heat exchange tube; 33. Collection box; 4. Circulating liquid supply mechanism; 41. Circulating pump; 42. Liquid supply pipe; 43. Recovery pipe; 44. Water tank; 5. Scraping mechanism; 51. Magnetic ring; 52. Scraping shell; 53. Driving member; 54. Connecting member; 6. Swirl element; 61. Scraper ring; 62. Axial flow blade; 7. Guard plate; 8. Install the ring; 9. Spoiler blades. DETAILED DESCRIPTION

[0024] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. Furthermore, features described for some examples may be combined in other examples.

[0025] like Figure 1 and Figure 3 As shown, a modular intelligent distribution box based on liquid cooling cycle according to an embodiment of the present invention includes a box body 1 and electrical components 2 arranged in the box body 1, and a liquid cooling element 3 is provided inside the box body 1; The liquid cooling element 3 is connected to a circulating liquid supply mechanism 4 buried underground; The box body 1 is provided with a scraping mechanism 5 for scraping liquid from the liquid cooling element 3, and the liquid scraped by the scraping mechanism 5 is discharged from the box body 1; The scraping mechanism 5 includes a magnetic ring 51, which magnetically acts on the liquid in the liquid cooling element 3; A swirl element 6 is provided in the liquid cooling element 3 and moves along with the movement of the magnetic ring 51 . The swirl element 6 moves along to scrape the inner wall of the liquid cooling element 3 .

[0026] The circulating liquid supply mechanism 4 delivers cooling liquid to the liquid cooling member 3, which absorbs the heat generated by the electrical components 2 in the housing 1 to achieve heat dissipation. Condensed water generated by the temperature difference between the air in the housing 1 and the surface of the low-temperature liquid cooling member 3 is scraped off by the magnetic ring 51 of the scraping mechanism 5 as the mechanism moves, and the liquid is discharged from the housing 1. When the magnetic ring 51 moves, the swirl member 6 in the liquid cooling member 3 is driven to move synchronously by magnetic force. The swirl member 6 scrapes off any dirt or liquid that may remain on the inner wall of the liquid cooling member 3, thereby simultaneously solving the problems of condensed water residue and dirt on the inner wall of the liquid cooling member 3, preventing condensed water from reducing the heat exchange efficiency or threatening the insulation safety of the electrical components 2, and ensuring continuous and stable liquid cooling.

[0027] like Figure 2 As shown, the liquid cooling unit 3 includes a diverter box 31, a heat exchange tube 32 and a collection box 33. The diverter box 31 and the collection box 33 are installed inside the box body 1, and the diverter box 31 is in one-way communication with the collection box 33 through the heat exchange tube 32. Both ends of the heat exchange tube 32 are respectively provided with a one-way valve (not shown in the figure) at the connection points with the diverter box 31 and the collection box 33.

[0028] The heat exchange tube 32 is made of ceramic material or graphene composite material.

[0029] The cooling liquid transported by the circulating liquid supply mechanism 4 first enters the diverter box 31 and is distributed to multiple heat exchange tubes 32 through the diverter box 31. The cooling liquid absorbs heat in the box 1 when flowing in the heat exchange tube 32, and finally converges into the collection box 33 and flows back to the circulating liquid supply mechanism 4. The orderly distribution and collection of the cooling liquid are achieved through the diverter box 31 and the collection box 33. The multiple heat exchange tubes 32 increase the contact area with the air in the box 1, improve the heat dissipation efficiency, and adapt to the heat dissipation requirements of multiple electrical components 2 in the box. At the same time, due to the diversion of the diverter box 31, the temperature entering each heat exchange tube 32 is consistent, so that each heat exchange tube 32 maintains good heat dissipation in its corresponding area, avoiding the previous circuitous setting that makes the cooling temperature just entering the box 1 low, and the flow temperature gradually increases, resulting in poor cooling effect in subsequent cooling areas.

[0030] The diverter box 31 and the collection box 33 are both made of plastic material, which reduces the temperature difference between them and the air inside the box 1, thereby preventing the phenomenon of air liquefaction and adhesion thereon.

[0031] like Figure 2 and Figure 5 As shown, the diverter box 31 and the collection box 33 are arranged in parallel and tilted toward one side of the box body 1 to form a diversion angle for scraping liquid.

[0032] When the scraping mechanism 5 scrapes water off the surface of the heat exchange tube 32, the tilt angle causes the liquid to flow to one side along the tilt surface of the collection box 33 under the action of gravity, avoiding liquid residue on the surface. The tilt angle is used to achieve natural diversion of the liquid and reduce the humidity inside the box 1.

[0033] like Figure 1 and 2 As shown, the circulating liquid supply mechanism 4 includes a circulating pump 41, a liquid supply pipe 42, a recovery pipe 43 and a water tank 44. The liquid inlet end of the circulating pump 41 extends into the interior of the water tank 44, and the liquid discharge end of the circulating pump 41 is connected to the diversion box 31 through the liquid supply pipe 42, and the collecting box 33 is connected to the water tank 44 through the recovery pipe 43.

[0034] The circulation pump 41 drives the liquid in the water tank 44 into the liquid cooling component 3 through the liquid supply pipe 42. After absorbing the heat in the box body 1, the heated coolant returns to the water tank 44 through the recovery pipe 43, taking advantage of the natural cooling of the underground environment and re-entering the circulation. The coolant is naturally cooled through the underground water tank 44, reducing the energy consumption of additional refrigeration equipment. The closed loop design ensures a continuous supply of coolant to meet the long-term heat dissipation needs of the electrical components 2 in the box body 1.

[0035] like Figure 2 and Figure 3As shown, the scraping mechanism 5 also includes a scraping shell 52 and a driving member 53. The driving member 53 is a cylinder or an electric push rod. There are multiple scraping shells 52, which are slidably mounted on the corresponding heat exchange tubes 32, and the multiple scraping shells 52 are connected by connecting members 54. The driving member 53 is installed on the box body 1, and the driving end of the driving member 53 drives the scraping shell 52 to move along the length direction of the heat exchange tube 32. The magnetic ring 51 is mounted on the inside of the scraping shell 52, and the scraping shell 52 is made of iron material.

[0036] The top and bottom of the scraper shell 52 are both bucket-shaped and respectively adapted to the inclinations of the diversion box 31 and the collection box 33 .

[0037] When the driving part 53 is started, all the scraping shells 52 are driven to move synchronously along the length direction of the heat exchange tube 32 through the connecting part 54. The outer wall of the scraping shell 52 scrapes off the water attached to the surface of the heat exchange tube 32. At the same time, the magnetic ring 51 in the scraping shell 52 moves with the scraping shell 52, and drives the vortex part 6 in the liquid cooling part 3 to move synchronously through magnetic adsorption. The mechanical scraping method efficiently removes condensed water on the surface of the heat exchange tube 32 to avoid water film reducing the heat exchange efficiency. The linkage between the magnetic ring 51 and the vortex part 6 realizes the simultaneous "external scraping + internal cleaning" and reduces maintenance costs.

[0038] The magnetic effect on the liquid water in the heat exchange tube 32 can effectively inhibit the long-term adhesion and deposition of mineral salts (such as calcium and magnesium). Its core effects are reflected in the following three aspects: Crystal transformation, loose scale layer: After the magnetic field treatment, the calcium carbonate crystals precipitated in the water are transformed from hard and dense calcite to loose aragonite, with the particle size increased and the adhesion significantly reduced, forming a "mud-like" soft scale that is easily washed away by the water flow, thus avoiding the formation of hard scale on the inner wall of the heat exchange tube 32.

[0039] Inhibit crystal nucleation and growth: The magnetic field increases the dipole moment of water molecules and locally breaks hydrogen bonds, producing more "free" water molecules that occupy crystal growth sites, thereby reducing the number of crystal cores, lowering the crystal growth rate, and delaying the deposition process.

[0040] Removes old dirt and keeps cleaning: Magnetized water can penetrate into the interface between the original scale layer and the metal wall, weakening its bonding force, causing the old scale to crack, peel off and gradually fall off, achieving a self-cleaning effect of "removing scale while running".

[0041] In summary, magnetic treatment physically changes the crystal structure and the association state of water molecules, achieving the goal of "preventing new scale and removing old scale" without changing the chemical composition, and is suitable for circulating cooling scenarios.

[0042] like Figure 4As shown, the swirl element 6 includes a scraper ring 61 and an axial flow blade 62 . The scraper ring 61 is slidably arranged inside the heat exchange tube 32 and is adsorbed by the magnetic ring 51 . The axial flow blade 62 is rotatably arranged inside the scraper ring 61 .

[0043] When the scraper ring 61 moves with the magnetic ring 51, it scrapes off the dirt on the inner wall of the heat exchange tube 32; at the same time, the coolant flowing in the heat exchange tube 32 drives the axial flow blades 62 to rotate, causing the coolant to generate a swirl, thereby enhancing the contact with the inner wall of the heat exchange tube 32; the scraper ring 61 removes the dirt on the inner wall to prevent its adhesion and affect the heat conduction; the swirl generated by the axial flow blades 62 increases the turbulence of the coolant, enhances the heat exchange efficiency, and further ensures the heat dissipation effect.

[0044] like Figure 2 As shown, symmetrical guard plates 7 are installed on both sides of the top of the collection box 33 along its length direction. The two ends of the guard plates 7 are connected to the inner wall of the box body 1, and an outlet 101 is opened in the box body 1 at the connection with the collection box 33.

[0045] The liquid scraped off by the scraping mechanism 5 is guided through the inclined surface of the collection box 33, and the protective plate 7 prevents the liquid from splashing into the interior of the box 1, confining the liquid in the top area of ​​the collection box 33, and finally discharged from the box 1 through the discharge port 101. The protective plate 7 cooperates with the discharge port 101 to ensure that the scraped liquid is completely discharged from the box 1, avoids the increase of humidity in the box, and protects the insulation performance of the electrical components 2.

[0046] like Figure 3 and Figure 4 As shown, a mounting ring 8 is sleeved on the middle part of the heat exchange tube 32 , and a flow-turbulating blade 9 is rotatably provided on the middle part of the mounting ring 8 .

[0047] When the coolant in the heat exchange tube 32 flows, it impacts the spoiler blades 9 to cause them to rotate, disrupting the coolant in the original laminar state and forming turbulence. The coolant in the turbulent state contacts the inner wall of the heat exchange tube 32 more fully, the heat transfer efficiency is improved, and the heat dissipation capacity of the liquid cooling component 3 is further enhanced.

[0048] Working principle: The water tank 44 buried underground uses the underground low temperature environment to cool the coolant, and the circulation pump 41 pumps the low temperature coolant into the diversion box 31 in the box body 1 through the liquid supply pipe 42; The diverter box 31 evenly distributes the coolant to the multiple heat exchange tubes 32. The heat exchange tubes 32 exchange heat with the air in the box 1 and absorb the heat generated by the operation of the electrical components 2. The cooling liquid after absorbing heat flows into the collection box 33 through the one-way valve, and then flows back to the water tank 44 through the recovery pipe 43, completing a cycle and utilizing the natural cooling of the underground environment.

[0049] External condensed water removal: A temperature difference is formed between the air in the box body 1 and the surface of the low-temperature heat exchange tube 32, and the water vapor condenses into droplets. The driving member 53 drives multiple scraping shells 52 to move synchronously along the heat exchange tube 32 through the connecting member 54. The outer wall of the scraping shell 52 mechanically scrapes off the surface condensed water. Its bucket-shaped top / bottom is adapted to the inclined diversion box 31 / collection box 33 to scrape off the residual liquid in the corners.

[0050] Internal dirt removal: The magnetic ring 51 in the scraper shell 52 moves with the scraper shell, and the scraper ring 61 in the heat exchange tube 32 moves synchronously through magnetic attraction. The inner wall of the scraper ring 61 scrapes off the deposits in the tube; at the same time, the coolant in the tube drives the axial flow blades 62 in the scraper ring 61 to rotate, generating a swirl to enhance the liquid turbulence and improve the heat exchange efficiency.

[0051] Magnetic-assisted anti-scaling: The magnetic field generated by the magnetic ring 51 penetrates the heat exchange tube 32, transforming the mineral crystal form in the coolant in the heat exchange tube 32, reducing the deposition of hard scale, and weakening the adhesion of old scale. Cooperating with the scraper ring 61, it achieves the dual effects of "preventing new scale + removing old scale".

[0052] Directed liquid discharge: The scraped condensed water flows along the inclined top surface of the collection box 33. The guard plates 7 on both sides of the collection box 33 prevent the liquid from splashing, confining it to the collection area, and finally discharge it out of the box through the discharge port 101 of the box body 1, thus preventing the humidity inside the box from increasing. The turbulent blades 9 in the exchange tube 32 rotate with the liquid flow, further enhancing the turbulence, ensuring that the coolant is in full contact with the tube wall, and maintaining efficient heat dissipation.

[0053] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A modular intelligent distribution box based on liquid cooling cycle, comprising a box body (1) and electrical components (2) arranged in the box body (1), characterized in that: A liquid cooling element (3) is provided inside the box (1); The liquid cooling element (3) is connected to a circulating liquid supply mechanism (4) buried underground; The box body (1) is provided with a scraping mechanism (5) for scraping liquid from the liquid cooling element (3), and the liquid scraped by the scraping mechanism (5) is discharged from the box body (1); The scraping mechanism (5) comprises a magnetic ring (51), and the magnetic ring (51) acts magnetically on the liquid in the liquid cooling part (3); A vortex component (6) is provided in the liquid cooling component (3) and moves along with the movement of the magnetic ring (51). The vortex component (6) moves along to scrape the inner wall of the liquid cooling component (3).

2. The modular intelligent distribution box based on liquid cooling cycle according to claim 1, characterized in that: The liquid cooling element (3) comprises a diverter box (31), a heat exchange tube (32) and a collection box (33); the diverter box (31) and the collection box (33) are installed inside the box body (1), and the diverter box (31) is in one-way communication with the collection box (33) via the heat exchange tube (32).

3. The modular intelligent distribution box based on liquid cooling cycle according to claim 2, characterized in that: The diversion box (31) and the collection box (33) are arranged in parallel and are inclined toward one side of the box body (1) to form a diversion angle for scraping liquid.

4. The modular intelligent distribution box based on liquid cooling cycle according to claim 1, characterized in that: One-way valves are provided at the two ends of the heat exchange tube (32) and at the points where they are connected to the diversion box (31) and the collection box (33).

5. A modular intelligent distribution box based on liquid cooling cycle according to any one of claims 2 to 4, characterized in that: The circulating liquid supply mechanism (4) comprises a circulating pump (41), a liquid supply pipe (42), a recovery pipe (43) and a water tank (44). The liquid inlet end of the circulating pump (41) extends into the interior of the water tank (44). The liquid discharge end of the circulating pump (41) is connected to the diversion box (31) through the liquid supply pipe (42). The collecting box (33) is connected to the water tank (44) through the recovery pipe (43).

6. The modular intelligent distribution box based on liquid cooling cycle according to claim 3, characterized in that: The scraping mechanism (5) further comprises a scraping shell (52) and a driving member (53). The scraping shells (52) are multiple in number and are respectively slidably mounted on corresponding heat exchange tubes (32). The multiple scraping shells (52) are connected by connecting members (54). The driving member (53) is mounted on the box (1), and the driving end of the driving member (53) drives the scraping shell (52) to move along the length direction of the heat exchange tube (32). The magnetic ring (51) is mounted inside the scraping shell (52).

7. The modular intelligent distribution box based on liquid cooling cycle according to claim 6, characterized in that: The top and bottom of the scraper shell (52) are both bucket-shaped and respectively adapted to the inclinations of the diversion box (31) and the collection box (33).

8. The modular intelligent distribution box based on liquid cooling cycle according to claim 2, characterized in that: The swirl element (6) comprises a scraper ring (61) and an axial flow blade (62). The scraper ring (61) is slidably arranged inside the heat exchange tube (32) and is adsorbed by the magnetic ring (51). The axial flow blade (62) is rotatably arranged inside the scraper ring (61).

9. The modular intelligent distribution box based on liquid cooling cycle according to claim 3, characterized in that: Symmetrical guard plates (7) are installed on both sides of the top of the collection box (33) along its length direction. Both ends of the guard plates (7) are connected to the inner wall of the box body (1), and a discharge outlet (101) is opened in the box body (1) at the connection with the collection box (33).

10. The modular intelligent distribution box based on liquid cooling cycle according to claim 8, characterized in that: A mounting ring (8) is sleeved on the middle portion of the heat exchange tube (32), and a flow-turbulating blade (9) is rotatably provided on the middle portion of the mounting ring (8).

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