Hybrid combined automotive radiator fan

Abstract

The present invention relates to the technical field of automotive cooling fans, and particularly to a hybrid combined automotive radiator fan, which includes an air inlet cover and an air outlet cover detachably connected to the air inlet cover; an impeller group rotatably connected within the air inlet cover; a mounting member fixedly installed within the air inlet cover, and a ring plate is also installed on the mounting member; a rotating member fixedly connected to the other output end of a dual-axis motor, with a first fan blade group installed on the left outer wall of the rotating member and a second fan blade group installed on the right outer wall of the rotating member. By providing the impeller group and the rotating member, it can further accelerate the airflow generated by the fan, improving the air-blowing effect; and combined with the first fan blade group and the second fan blade group provided on the rotating member, it can effectively reduce the pressure on the dual-axis motor, ensure efficient output, and thus ensure efficient air-blowing.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive radiator fans, and particularly to a hybrid combined automotive radiator fan. Background Art

[0002] An automotive air conditioning system is a device for cooling, heating, ventilating, and purifying the air inside the vehicle cabin. An automotive radiator consists of an inlet chamber, an outlet chamber, and a radiator core. The coolant flows inside the radiator core, and the air passes outside the radiator. The hot coolant cools down by dissipating heat to the air, and the cold air warms up by absorbing the heat dissipated by the coolant. In an automotive radiator, a fan is required for heat exchange to achieve the purpose of heat dissipation.

[0003] The existing fans used in automotive radiators usually adopt a single group of fans for blowing air, and use the positive and negative pressure method to blow air at the fan outlet. In this process, the single group of fans needs to overcome various resistances during the blowing process. At the rated power, the blowing efficiency is poor, which is reflected in the automotive air conditioning system as a slow heat dissipation efficiency and a poor experience. Summary of the Invention

[0004] Aiming at the above-mentioned shortcomings of the existing technology, the present invention provides a hybrid combined automotive radiator fan, which can effectively solve the problems that the existing fans used in automotive radiators usually adopt a single group of fans for blowing air, and use the positive and negative pressure method to blow air at the fan outlet. In this process, the single group of fans needs to overcome various resistances during the blowing process. At the rated power, the blowing efficiency is poor, which is reflected in the automotive air conditioning system as a slow heat dissipation efficiency and a poor experience.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides a hybrid combined automotive radiator fan, including an air inlet cover and an air outlet cover detachably connected to the air inlet cover;

[0007] An impeller group is rotatably connected inside the air inlet cover. A flow guide block is provided inside the impeller group. An air inlet channel is formed between the inner wall of the impeller group and the outer wall of the flow guide block. A clamping block is also fixedly connected to the outer wall on the right side of the flow guide block;

[0008] A mounting member is fixedly installed inside the air inlet cover. A double-shaft motor is installed at the middle position thereof. The edge of the mounting member is curved. An installation ring for placing the double-shaft motor is fixedly installed in the middle of the mounting member. The output end of the double-shaft motor is fixedly connected to the flow guide block. A ring-shaped plate is also installed on the mounting member. A plurality of first through grooves are formed in a ring-shaped structure at the edge of the mounting member, and a second through groove is formed in a ring-shaped structure at the middle of the mounting member;

[0009] A rotating member is fixedly connected to the other output end of the dual-axis motor. A first fan blade group is installed on the left outer wall of the rotating member, and a second fan blade group is installed on the right outer wall of the rotating member. A plurality of through holes are formed in a ring shape in the middle of the rotating member. A heat dissipation cylinder is fixedly installed in the middle of the right side of the rotating member, and a heat dissipation channel is formed inside it. A plurality of inclined holes are formed in a ring shape on the inner wall of the heat dissipation channel.

[0010] Further, an air inlet cavity is formed in the air inlet cover, and an air outlet cavity is formed in the air outlet cover; both the air inlet cavity and the air outlet cavity are communicated with the external air.

[0011] Further, there is a flow gap between the impeller group and the inner wall of the air inlet cavity for air intake; the guide block is in a conical structure, and its diameter gradually increases along the air intake direction; the guide block and the impeller group are fixedly connected by a plurality of connecting blocks.

[0012] Further, the left edge outer wall of the annular plate is in sliding fit with the right edge outer wall of the impeller group; the clamping block is located in the middle of the annular plate, and an installation groove is formed in the middle of the clamping block, and the inner wall of the installation groove is in sliding fit with the outer wall of the installation ring; the annular plate separates the first through groove and the second through groove, so that the air intake channel is communicated with the second through groove, and the flow gap between the impeller group and the air inlet cavity is communicated with the first through groove.

[0013] Further, an annular strip is also fixedly installed on the left outer wall of the rotating member; the through hole is communicated with the second through groove.

[0014] Further, a plurality of first heat dissipation holes are uniformly formed in a ring shape in the middle of the installation member; a plurality of second heat dissipation holes corresponding to the first heat dissipation holes are uniformly formed on the left inner wall of the heat dissipation channel; the first heat dissipation holes, the second heat dissipation holes and the heat dissipation channel are communicated.

[0015] Further, a guide member is also included, which is used to guide the gas flowing through the through hole and act on the second fan blade group to assist the rotation of the rotating member; a first air guiding groove is formed in a ring shape at the edge of the guide member, a lapping groove that lapped with the outer wall of the heat dissipation cylinder is formed through the middle of the guide member, and a plurality of second air guiding grooves are formed in a ring shape on the inner wall of the lapping groove; a bending plate is fixedly installed on the left edge outer wall of the guide member to guide the gas flowing through the through hole.

[0016] Further, a housing is also included, which is fixedly installed on the air outlet cover, and the guide member is fixedly installed on the housing. A groove is formed on the left end outer wall of the housing; the inner wall of the groove is inserted and kept in sliding fit with the convex strip fixedly installed on the right end outer wall of the rotating member; a through hole is formed in the middle of the right end of the housing, and the through hole corresponds to the right end outlet of the heat dissipation cylinder.

[0017] Beneficial effects

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the known public technologies:

[0019] By providing an impeller group and a rotating member, the present invention can further accelerate the airflow generated by the fan, improving the air-blowing effect; and by combining the first blade group and the second blade group provided on the rotating member, the pressure on the dual-axis motor can be effectively reduced, ensuring efficient output and thus ensuring high efficiency of air blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 Schematic diagram of the overall external structure of the heat dissipation fan of the present invention;

[0022] Figure 2 Exploded schematic diagram of the overall structure of the heat dissipation fan of the present invention;

[0023] Figure 3 Of the present invention Figure 2 Enlarged schematic diagram at position A;

[0024] Figure 4 Schematic diagram of the structure when the impeller group of the present invention is separated from the mounting member;

[0025] Figure 5 Of the present invention Figure 4 Enlarged structure schematic diagram at position B;

[0026] Figure 6 Schematic diagram of the structure when the mounting member of the present invention is separated from the rotating member;

[0027] Figure 7 Of the present invention Figure 6 Enlarged structure schematic diagram at position C;

[0028] Figure 8 Schematic diagram of the structure when the rotating member of the present invention is separated from the guiding member;

[0029] Figure 9 Of the present invention Figure 8 Enlarged structure schematic diagram at position D;

[0030] Figure 10 Overall sectional schematic diagram of the radiator fan of the present invention;

[0031] Figure 11 Of the present inventionFigure 10 Schematic diagram of the enlarged structure at position E;

[0032] Figure 12 of the present invention Figure 10 Schematic diagram of the enlarged structure at position F;

[0033] Figure 13 Schematic diagram of the overall sectional exploded structure of the radiator fan of the present invention;

[0034] Reference numerals

[0035] 100, air inlet hood; 101, air inlet cavity;

[0036] 200, air outlet hood; 201, air outlet cavity;

[0037] 300, impeller group; 310, air inlet channel;

[0038] 400, guide block; 410, clamping block; 411, installation groove; 420, connecting block;

[0039] 500, mounting member; 501, first through groove; 502, second through groove; 503, first heat dissipation hole; 510, mounting ring; 520, annular plate;

[0040] 600, dual-axis motor;

[0041] 700, rotating member; 701, annular strip; 702, through hole; 703, second heat dissipation hole; 704, rib; 710, first fan blade group; 720, second fan blade group; 730, heat dissipation cylinder; 731, heat dissipation channel; 732, inclined hole;

[0042] 800, guiding member; 801, first air guiding groove; 802, second air guiding groove; 810, bending plate;

[0043] 900, housing; 901, groove. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] The present invention will be further described below with reference to the embodiments.

[0046] Embodiment:

[0047] Refer to the attachedFigure 1 - Attached Figure 13 As shown in Figure 13 , the hybrid combined automotive radiator fan includes an air inlet hood 100 and an air outlet hood 200 detachably connected to the air inlet hood 100. An air inlet cavity 101 is formed in the air inlet hood 100, and an air outlet cavity 201 is formed in the air outlet hood 200. Both the air inlet cavity 101 and the air outlet cavity 201 communicate with the external air. The air inlet hood 100 and the air outlet hood 200 can be installed by means of snap connection, and the radiator fan can be fixedly installed on the vehicle through a mounting base on the outer wall of the air inlet hood 100. After the air inlet hood 100 and the air outlet hood 200 are installed, the formed air inlet cavity 101 and air outlet cavity 201 can form a relatively sealed chamber, and two outlets are respectively formed on the left and right sides of this chamber to keep communicating with the external air;

[0048] In this case, a radiator fan is provided. A impeller group 300 is rotatably connected in the air inlet hood 100. It should be noted that the double-shaft motor 600 arranged in the air inlet cavity 101 can drive the impeller group 300 to rotate. A flow guiding block 400 is arranged in the impeller group 300. An air inlet passage 310 is formed between the inner wall of the impeller group 300 and the outer wall of the flow guiding block 400. There is a flow gap between the impeller group 300 and the inner wall of the air inlet cavity 101 for air intake. The output end of the double-shaft motor 600 is fixedly connected to the flow guiding block 400. The flow guiding block 400 is in a conical structure, and its diameter gradually increases along the air inlet direction. The flow guiding block 400 and the impeller group 300 are fixedly connected by a plurality of connecting blocks 420. When the arranged double-shaft motor 600 drives the arranged impeller group 300 to rotate, at the inlet of the air inlet cavity 101 at this time, due to the high rotation speed of the impeller group 300, a certain negative pressure will be formed at this position, thus realizing air intake. It should be noted that there is an open space in the middle of the impeller group 300, and the flow guiding block 400 is connected in this open space through the connecting block 420. Therefore, when the impeller group 300 rotates, there are two air intake methods. One is the flow gap between the air inlet hood 100 and the outer wall of the impeller group 300, and the other is at the air inlet passage 310 between the middle of the impeller group 300 and the flow guiding block 400. By this method, the total air intake of the radiator fan can be increased, so as to improve the air blowing effect of the radiator fan.

[0049] In this case, a mounting member 500 is fixedly installed inside the air inlet hood 100. A mounting ring 510 for placing the dual-axis motor 600 is fixedly installed in the middle of the mounting member 500. The edge of the mounting member 500 is curved, and the outer wall of the mounting member 500 is fixedly connected to the inner wall of the air inlet cavity 101. A clamping block 410 is also fixedly connected to the outer wall on the right side of the flow guiding block 400; a mounting groove 411 is formed in the middle of the clamping block 410, and the inner wall of the mounting groove 411 is slidably matched with the outer wall of the mounting ring 510. Specifically, an installation space is provided in the middle of the mounting ring 510 for placing the dual-axis motor 600. To ensure good sound insulation and vibration damping effects, a sound insulation layer is provided on the inner wall of the mounting ring 510, which wraps the outer wall of the dual-axis motor 600. And to ensure good sound insulation effects, the mounting ring 510 is inserted into the mounting groove 411 formed in the middle of the clamping block 410. It is worth noting that since the dual-axis motor 600 will drive the provided impeller group 300 to rotate during actual use, the inner wall of the mounting groove 411 is slidably matched with the outer wall of the provided mounting ring 510.

[0050] As described above, after the dual-axis motor 600 is fixedly installed through the provided mounting member 500, when the impeller group 300 rotates to achieve air blowing, two airflows are generated respectively from the flow gap and the air inlet passage 310 for air blowing. For the above two airflows, the mounting member 500 also effectively separates the two airflows. Specifically, a plurality of first through grooves 501 are formed in a ring structure at the edge of the mounting member 500, and a second through groove 502 is formed in a ring structure in the middle of the mounting member 500. The airflow in the flow gap will continue to flow towards the air outlet cavity 201 from the first through groove 501 formed in the mounting member 500, and the airflow blown in from the air inlet passage 310 will continue to flow towards the air outlet cavity 201 from the second through groove 502 formed in the mounting member 500. And to prevent the two airflows from colliding with each other to form turbulence during actual flow, which will affect the air blowing efficiency. In this case, a ring plate 520 is also installed on the mounting member 500. The outer wall of the left edge of the ring plate 520 is slidably matched with the outer wall of the right edge of the impeller group 300; the clamping block 410 is located at the middle position of the ring plate 520; the ring plate 520 separates the first through groove 501 and the second through groove 502, so that the air inlet passage 310 is kept in communication with the second through groove 502, and the flow gap between the impeller group 300 and the air inlet cavity 101 is in communication with the first through groove 501. By providing the arc-shaped ring plate 520, the above two airflows can be well separated from each other, avoiding their mutual contact to generate turbulence, and ensuring efficient air blowing.

[0051] In this case, the provided impeller group 300 can achieve effective air blowing. Moreover, by means of the two gas flow tracks provided, the generation of turbulent flow can be effectively avoided, thus ensuring efficient air blowing. However, when a single impeller group 300 rotates to drive the gas flow, the flow rate of the gas is limited. Therefore, the air blowing effect will also be restricted. Then, in this case, along the gas flow direction, a rotating member 700 that rotates relative to the air inlet hood 100 is further provided to drive the gas to flow further. Specifically, the rotating member 700 is fixedly connected to the other output end of the dual-axis motor 600, and one end of the dual-axis motor 600 is fixedly connected to the impeller group 300 as well. In this case, when the dual-axis motor 600 rotates, it can drive the provided impeller group 300 and the rotating member 700 to move synchronously respectively. When the rotating member 700 rotates, the first fan blade group 710 provided on the outer wall of the left side of the rotating member 700 will keep rotating. It should be noted that at the edge of the impeller group 300, the gas will continue to be transported by the rotating first fan blade group 710. And it should be noted that through the annular strip 701 provided on the outer wall of the left edge of the rotating member 700, it can ensure that the air flow passing through the first through groove 501 can be stably captured by the first fan blade group 710 and continue to be transported along the direction of the fan blades on the first fan blade group 710. By this means, the air flow can be accelerated twice, thereby ensuring the efficient air blowing of this radiator fan.

[0052] A second fan group 720 is installed on the right outer wall of the rotating member 700 to assist the rotation of the rotating member 700. It should be noted that since the airflow blown to the first fan group 710 has a certain flow rate, the rotating first fan group 710 needs to re-break the original flow trajectory of the airflow. Therefore, the rotation and air blowing of the rotating member 700 will drive a relatively large output pressure of the dual-axis motor 600. Therefore, in this case, a second fan group 720 is also provided on the rotating member 700. The second fan group 720 has no external driving force, but uses the airflow flowing through the second through groove 502 to assist its rotation. Specifically, it further includes a guiding member 800 provided at the right side position of the rotating member 700, which is used to guide the gas flowing through the through hole 702 and act on the second fan group 720 to assist the rotation of the rotating member 700; a bending plate 810 is fixedly installed on the left edge outer wall of the guiding member 800 for guiding the gas flowing through the through hole 702. Specifically, a plurality of through holes 702 are formed in an annular structure in the middle of the rotating member 700, and in combination with the through holes 702, the through holes 702 are kept in communication with the second through groove 502. The airflow passing through the second through groove 502 will flow out from the through holes 702 and blow on the provided bending plate 810, and continue to flow along the bending direction of the bending plate 810 and blow on the provided second fan group 720 to assist the rotation of the rotating member 700. And a first air guiding groove 801 is formed in an annular structure at the edge of the guiding member 800. After the airflow acting on the second fan group 720 assists the rotation of the second fan group 720, it can continue to flow into the air outlet cavity 201 from the provided first air guiding groove 801.

[0053] In this case, since the dual-axis motor 600 is arranged to drive the arranged impeller group 300 and the rotating member 700 to rotate synchronously at the same time, certain heat will be generated during its operation. Therefore, in this case, certain design is also carried out for the heat dissipation of the dual-axis motor 600. Specifically, a heat dissipation cylinder 730 is fixedly installed in the middle of the right side of the rotating member 700, and a heat dissipation channel 731 is opened inside it. A plurality of inclined holes 732 are arranged in a ring structure on the inner wall of the heat dissipation channel 731. A lap groove that overlaps with the outer wall of the heat dissipation cylinder 730 is penetrated through the middle of the guiding member 800, and a plurality of second air guiding grooves 802 are arranged in a ring structure on the inner wall of the lap groove. A plurality of first heat dissipation holes 503 are uniformly arranged in a ring structure in the middle of the mounting member 500; a plurality of second heat dissipation holes 703 corresponding to the first heat dissipation holes 503 are uniformly arranged on the left inner wall of the heat dissipation channel 731; the first heat dissipation holes 503, the second heat dissipation holes 703 and the heat dissipation channel 731 are communicated. Regarding the heat dissipation of the dual-axis motor 600, it is necessary to utilize the air flow flowing out from the through hole 702 to take away heat through the air flow. Specifically, when the air flow surges in from the through hole 702, on the one hand, it can flow through the arranged second air guiding grooves 802, and a part of it will also enter the heat dissipation channel 731 from the arranged inclined holes 732, increasing the flow speed of the gas in the heat dissipation cylinder 730. The heat of the dual-axis motor 600 can enter the heat dissipation channel 731 from the arranged first heat dissipation holes 503 through the second heat dissipation holes 703 and be taken away at the right port of the heat dissipation channel 731 through the air flow in it, realizing effective heat dissipation of the dual-axis motor 600.

[0054] This case also includes a housing 900, which is fixedly installed on the air outlet cover 200, and the guiding member 800 is fixedly installed on the housing 900. A groove 901 is opened on the outer wall of the left end of the housing 900; the inner wall of the groove 901 is inserted into and kept in sliding fit with a rib 704 fixedly installed on the outer wall of the right end of the rotating member 700; a through hole is opened in the middle of the right end of the housing 900, and the through hole corresponds to the right end outlet of the heat dissipation cylinder 730. By arranging the housing 900, it is used to separate two air flows in this case and reduce the generation of turbulence. Specifically, the gap formed between the outer wall of the housing 900 and the inner wall of the air outlet cavity 201 can effectively transmit the air flow transmitted through the first impeller group 710, and the inner wall of the housing 900 can effectively limit the flow track of the air flow surging from the first air guiding groove 801, the second air guiding groove 802 and the heat dissipation channel 731, and finally surge out from its right end outlet. When the gas surges out, the flow track of the air flow is effectively limited to ensure efficient air blowing.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Hybrid combined automotive radiator fan, characterized in that, comprising: an air inlet hood (100), and an air outlet hood (200) detachably connected to the air inlet hood (100); an impeller group (300), rotatably connected within the air inlet hood (100), a flow guiding block (400) is provided within the impeller group (300), an air inlet passage (310) is formed between the inner wall of the impeller group (300) and the outer wall of the flow guiding block (400), and a clamping block (410) is also fixedly connected to the outer wall on the right side of the flow guiding block (400); a mounting member (500), fixedly installed within the air inlet hood (100), a dual-axis motor (600) is installed at the middle position thereof, the edge of the mounting member (500) is curved, a mounting ring (510) for placing the dual-axis motor (600) is fixedly installed at the middle of the mounting member (500), the output end of the dual-axis motor (600) is fixedly connected to the flow guiding block (400), a ring-shaped plate (520) is also installed on the mounting member (500), a plurality of first through slots (501) are formed in a ring-shaped structure at the edge of the mounting member (500), and a second through slot (502) is formed in a ring-shaped structure at the middle of the mounting member (500); a rotating member (700), fixedly connected to the other output end of the dual-axis motor (600), a first fan blade group (710) is installed on the outer wall on the left side of the rotating member (700), a second fan blade group (720) is installed on the outer wall on the right side of the rotating member (700), a plurality of through holes (702) are formed in a ring-shaped structure at the middle of the rotating member (700), a heat dissipation cylinder (730) is fixedly installed at the middle on the right side of the rotating member (700), a heat dissipation passage (731) is formed inside it, and a plurality of inclined holes (732) are formed in a ring-shaped structure on the inner wall of the heat dissipation passage (731).

2. The hybrid combined automotive radiator fan according to claim 1, characterized in that, an air inlet chamber (101) is formed within the air inlet hood (100), and an air outlet chamber (201) is formed within the air outlet hood (200); both the air inlet chamber (101) and the air outlet chamber (201) are in communication with the external air.

3. The hybrid combined automotive radiator fan according to claim 2, characterized in that, a flow gap exists between the impeller group (300) and the inner wall of the air inlet chamber (101) for air intake; the flow guiding block (400) is in a conical structure, and its diameter gradually increases along the air inlet direction; the flow guiding block (400) and the impeller group (300) are fixedly connected by a plurality of connecting blocks (420).

4. The hybrid combined automotive radiator fan according to claim 3, characterized in that, the outer wall of the left edge of the ring-shaped plate (520) is in sliding fit with the outer wall of the right edge of the impeller group (300); the clamping block (410) is located at the middle position of the ring-shaped plate (520), and a mounting groove (411) is formed at the middle of the clamping block (410), and the inner wall of the mounting groove (411) is in sliding fit with the outer wall of the mounting ring (510). The annular plate (520) separates the first through groove (501) and the second through groove (502), such that the intake passage (310) remains in communication with the second through groove (502), and the flow gap between the impeller group (300) and the intake chamber (101) is in communication with the first through groove (501).

5. The hybrid combined automotive radiator fan according to claim 4, wherein, An annular strip (701) is further fixedly installed on the left outer wall of the rotating member (700); The through hole (702) remains in communication with the second through groove (502).

6. The hybrid combined automotive radiator fan according to claim 5, wherein, A plurality of first heat dissipation holes (503) are evenly formed in an annular structure in the middle of the mounting member (500); A plurality of second heat dissipation holes (703) corresponding to the first heat dissipation holes (503) are evenly formed on the left inner wall of the heat dissipation passage (731); The first heat dissipation holes (503), the second heat dissipation holes (703) and the heat dissipation passage (731) are in communication.

7. The hybrid combined automotive radiator fan according to claim 6, wherein, It further includes: A guiding member (800) for guiding the gas flowing through the through hole (702) and acting on the second fan blade group (720) to assist the rotation of the rotating member (700); A first air guiding groove (801) is formed in an annular structure at the edge of the guiding member (800), a lapping groove that lapped with the outer wall of the heat dissipation cylinder (730) is formed through the middle of the guiding member (800), and a plurality of second air guiding grooves (802) are formed in an annular structure on the inner wall of the lapping groove; A bent plate (810) is fixedly installed on the left edge outer wall of the guiding member (800) for guiding the gas flowing through the through hole (702).

8. The hybrid combined automotive radiator fan according to claim 7, wherein, It further includes: A housing (900) fixedly installed on the air outlet cover (200), and the guiding member (800) is fixedly installed on the housing (900), and a groove (901) is formed on the left end outer wall of the housing (900); The inner wall of the groove (901) is inserted with and maintains a sliding fit with a rib (704) fixedly installed on the right end outer wall of the rotating member (700); A through hole is formed in the middle of the right end of the housing (900), and the through hole corresponds to the right end outlet of the heat dissipation cylinder (730).

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