Water-cooling heat dissipation type fan cover and fan

Abstract

The utility model relates to the field of fans, and discloses a water-cooling heat dissipation type fan cover and a fan, which comprises a cover body with a hollow interior and two through ends, and a heat dissipation part arranged in the cover body, the heat dissipation part comprises a communication part which is installed in the cover body and used for communicating the two ends of the cover body and a circulation heat exchange part which is arranged in the communication part and used for being connected with external cooling water so as to cool air passing through the communication part. The heat dissipation part is installed in the cover body, so that high-temperature hot air sucked by the fan operating in the high-temperature environment is cooled and then sucked into the fan, damage to the internal structure of the fan caused by the high-temperature hot air is greatly reduced or even avoided, and the overall service life of the fan is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the field of fans, in particular to a water-cooled heat dissipation type fan cover and a fan. Background Art

[0002] The fan chamber relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine used for gas compression and gas transportation.

[0003] Fans are often used for cooling and heat dissipation in industrial production. For this reason, fans are often in high-temperature environments. The high-temperature hot air from the front end of the fan directly enters the fan, causing the fan to exceed its normal operating temperature. The internal bearing and body parts suffer great wear and tear. The fan body is prone to heat accumulation due to the heat conduction of its bearings, which is prone to risks under long-term high temperatures, resulting in a reduced fan life.

[0004] The common cooling method is to lubricate the bearings so that the air lubricated by the bearings circulates inside the bearings, thereby achieving a better cooling effect on the bearings, thereby reducing the temperature inside the fan body caused by the heat conduction of the bearings. However, although lubrication methods such as lubricating oil can play a certain lubricating role, the lubrication and cooling effect is limited. The high-temperature hot air at the front of the fan still continuously enters the fan. The cooling effect achieved by lubrication is far from enough to reduce the temperature inside the fan to a safe temperature, and the cooling effect is not ideal. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a water-cooled heat dissipation wind hood and a fan to solve the problem that the fan inhales high-temperature heat seals in a high-temperature environment and affects the service life of the fan.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a water-cooled heat-dissipating wind hood including a hood body which is hollow inside and has two through-holes, and a heat dissipation part installed in the hood body, wherein the heat dissipation part includes a connecting part installed in the hood body for connecting the two ends of the hood body, and a circulating heat exchange part arranged in the connecting part for connecting with external cooling water, wherein the connecting part allows the high-temperature hot air extracted when the fan is running to pass through the connecting part, and the circulating heat exchange part cools down the gas passing through the connecting part, so that the temperature of the gas reaching the bearing is no longer high, thereby reducing the loss to the fan and increasing the service life of the fan.

[0007] Furthermore, the cover body includes a base and an end cover which are hollow inside and have two ends arranged along a vertical through-hole. A first connecting plate is formed by a convex extension extending inwardly along the inner wall at one end of the base. An outlet is formed along the vertical through-hole on the inner side of the first connecting plate. The base is installed on the fan to suck in external air through the inner cavity and the outlet of the end cover when the fan is running; a second connecting plate is formed by a convex extension extending outwardly along the outer wall at one end of the end cover, which is adapted to and coaxially arranged with the first connecting plate. An installation cavity is jointly formed between the first connecting plate, the second connecting plate and the base, and the connecting part and the circulating heat exchange part are both installed in the installation cavity.

[0008] Furthermore, the cover body also includes a connecting piece for detachably connecting the first connecting plate, the connecting portion and the second connecting plate in sequence to facilitate disassembly, assembly and maintenance.

[0009] Furthermore, the connecting part includes a connecting shell installed in the installation cavity, a heat exchange cavity is formed in the connecting shell, and air inlets respectively connecting the heat exchange cavity and the installation cavity and air outlets respectively connecting the heat exchange cavity and the outlet are formed on the connecting shell, and the air inlets and air outlets are each provided with a plurality of air inlets and air outlets; the circulating heat exchange part is arranged in the heat exchange cavity and connected to external cooling water, and the high-temperature gas at the fan operation port enters the heat exchange cavity through the air inlet and is cooled by heat exchange with the high-temperature hot air of the circulating heat exchange unit, and the cooled gas enters the outlet through the air outlet to enter the fan, thereby reducing the temperature of the gas reaching the fan bearing.

[0010] Furthermore, the connecting portion also includes a heat sink that is sealed and connected to the first connecting plate and is located in the installation cavity. The heat sink is made of a heat-conducting material and has a plurality of heat dissipation cavities. The connecting shell is installed on the heat sink. The air outlet is connected to the outlet, and the air inlet is connected to each heat dissipation cavity. The heat dissipation cavity realizes initial heat exchange and cooling by the heat sink when entering the heat dissipation cavity, and then further cooling when entering the heat exchange cavity, so as to improve the cooling effect.

[0011] Furthermore, an installation groove is provided on the heat sink, which vertically penetrates the heat sink and is coaxially arranged and connected with the outlet. Each of the heat dissipation cavities penetrates the heat sink inwardly in the horizontal direction to be connected with the installation groove. The connecting shell is sealed and connected in the installation groove. The air outlet is located on the side surface of the connecting shell facing the outlet to be connected with the outlet. The air inlet is located on the side wall of the connecting shell facing each heat dissipation cavity to be connected with the heat dissipation cavity, so that the high-temperature hot air is first initially cooled by the heat dissipation cavity before entering the air inlet, thereby achieving double cooling of the high-temperature air.

[0012] Furthermore, the inner diameter of the air outlet is smaller than the inner diameter of the air inlet, and a curved arc of the air outlet is formed on the connecting shell to slow down the gas output speed and increase the residence time of the gas in the heat exchange chamber.

[0013] Furthermore, positioning blocks are formed on at least two inner walls of the through groove near the outlet, which extend inward in the horizontal direction, bend, and extend vertically toward one side of the end cover. A positioning groove is formed on the connecting shell at a position corresponding to the positioning block, which is open toward the outlet side and allows the positioning block to pass through, so as to realize the connection between the connecting shell and the heat sink.

[0014] Furthermore, the circulating heat exchange part includes a heat exchange tube installed in a spiral shape in the heat exchange cavity, and both ends of the heat exchange tube are successively passed through the connecting shell and the outside of the base to respectively connect to the water inlet and water outlet of the external cooling water, so that the hot air in the heat exchange cavity is heat-exchanged and cooled by circulating cooling water in the heat exchange tube.

[0015] The utility model also provides a fan, which comprises a water-cooled heat dissipation type wind cover to reduce the temperature of the gas sucked by the fan and increase the service life of the fan.

[0016] The water-cooled heat dissipation wind hood and fan of the utility model have at least the following beneficial effects: by installing a heat dissipation part in the hood body, the high-temperature hot air sucked in by the fan running in a high-temperature environment is cooled before being sucked into the fan, which greatly reduces or even avoids the damage to the internal structure of the fan caused by the high-temperature hot air, and effectively improves the overall service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the water-cooled heat dissipation type wind hood of the utility model;

[0019] Figure 2 It is an exploded view of the water-cooling heat dissipation type wind cover of the utility model;

[0020] Figure 3 It is a top view of the connecting part of the utility model;

[0021] Figure 4 It is a front cross-sectional view of the connecting portion of the utility model.

[0022] The meanings of the symbols in the accompanying drawings are:

[0023] Cover body-1; base-11; first connecting plate-111; through hole-112; end cover-12; second connecting plate-121; connecting piece-13; fixing column-131; outlet-14; heat dissipation part-2; connecting part-21; connecting shell-211; heat exchange cavity-2111; air inlet-2112; air outlet-2113; positioning groove-2114; heat sink-212; bottom plate-2121; vertical plate-2122; heat dissipation cavity-2123; placement groove-2124; positioning block-2125; support block-2126; installation groove-2127; circulating heat exchange part-22; positioning hole-3. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] The fan of the utility model comprises a fan body (not shown in the figure) and a water-cooled heat dissipation type wind hood installed on the fan body, the fan body comprises a casing and a power device installed inside the casing, and the water-cooled heat dissipation type wind hood is installed on one side of the air inlet end of the casing; the power device is assembled by a motor, a coupling, a bearing, an impeller, a generator and other structures. Since the fan body is common knowledge, the specific structure will not be described in detail here.

[0026] like Figures 1 to 4 As shown, the water-cooled heat dissipation hood of the utility model includes a hood body 1 which is hollow inside and has two through ends, and a heat dissipation part 2 installed in the hood body 1. The hood body 1 is sealed and connected to the air inlet end of the casing. After the power device in the casing is started, the impeller rotates and draws air through one side of the air inlet 2112 to inhale high-temperature hot air. The hot air passes through the hood body 1 and the heat dissipation part 2. The heat dissipation part 2 cools the passing gas to reduce the temperature of the gas entering the casing, thereby effectively reducing the damage of the high-temperature hot air to the power device inside the casing, allowing the power device to be used normally, and improving the service life and cooling effect of the fan.

[0027] In this embodiment, the cover body 1 includes a base 11 which is hollow inside and has two ends which are vertically connected, an end cover 12 and a connector 13. The base 11 is used to be sealed and connected to the inlet end of the casing. The casing is provided with a ring-shaped sealing ring around the diameter of the base 11 and the inlet end of the casing, and sealing is achieved after the base 11 is connected to the casing; the end cover 12 cooperates with the base 11 and an installation cavity is formed between the end cover 12, and the heat dissipation part 2 is installed in the installation cavity. After the fan is running, the high-temperature hot air outside is sucked into the installation cavity and enters the inside of the fan after being cooled by the heat dissipation part 2; the connector 13 is used to connect the base 11, the heat dissipation part 2 and the end cover 12 together in a detachable manner, so as to facilitate the installation and disassembly between the base 11, the end cover 12 and the heat dissipation part 2, so as to facilitate the maintenance of the entire fan cover.

[0028] In the content defined in this embodiment, the base 11 is in a circular tube shape with an annular side wall, the two ends of the base 11 are connected and the axial direction is distributed in the vertical direction, and a first annular connecting plate 111 is arranged around the inner side wall of one end of the base 11, and the outer side wall of the first connecting plate 111 is fixed and sealed to the inner side wall of the base 11, and the inner side wall of the first connecting plate 111 is formed by convexly extending inward in the horizontal direction, and a through hole penetrating in the vertical direction is formed on the inner side of the first connecting plate 111, and the through hole on the first connecting plate 111 is defined as the outlet 14. It should be noted that the vertical direction described in the utility model refers to the vertical direction, and the horizontal direction refers to the horizontal direction perpendicular to the vertical direction.

[0029] In the content defined in this embodiment, the end cover 12 can be provided with a cylindrical round tube structure, or a truncated cone or funnel-shaped round tube structure, and the two ends of the end cover 12 are connected and the axial direction is also distributed in the vertical direction. A second connecting plate 121 in a circular shape is provided around the outer wall of one end of the end cover 12, and the inner wall of the second connecting plate 121 is fixed and sealed to the outer wall of the end cover 12, and the outer wall of the second connecting plate 121 is formed by convexly extending outward in the horizontal direction, and the outer ring diameter of the second connecting plate 121 is greater than or equal to the outer diameter of the base 11, and the first connecting plate 111 is adapted relative to the second connecting plate 121, so that the end cover 12 can be supported on the base 11 through the second connecting plate 121. During installation, the second connecting plate 121 is installed on the end of the base 11 away from the outlet 14, so that the first connecting plate 111, the second connecting plate 121 and the base 11 are jointly surrounded to form a cylindrical installation cavity.

[0030] In the content defined in this embodiment, the connector 13 includes a plurality of fixing columns 131 axially distributed vertically, and a plurality of positioning holes 3 for the fixing columns 131 to pass through are provided in a circular shape along the circumferential direction on the first connecting plate 111, the second connecting plate 121 and the heat dissipation portion 2. The positioning holes 3 on the first connecting plate 111, the second connecting plate 121 and the heat dissipation portion 2 are all vertically oppositely distributed, and the positioning holes 3 on the first connecting plate 111, the second connecting plate 121 and the heat dissipation portion 2 correspond to the fixing columns 131 one by one. The fixing columns 131 can be threaded columns, and the positioning holes 3 are threaded holes. The detachable connection between the base 11, the end cover 12 and the heat dissipation portion 2 is realized by threaded connection, and the heat dissipation portion 2 is located between the first connecting plate 111 and the second connecting plate 121.

[0031] In this embodiment, the heat dissipation part 2 includes a connecting part 21 installed in the cover body 1 for connecting the two ends of the cover body 1 and a circulating heat exchange part 22 arranged in the connecting part 21 for connecting with external cooling water. The connecting part 21 and the circulating heat exchange part 22 are both installed in the installation cavity. When the fan in a high-temperature environment is running to extract external high-temperature hot air, the high-temperature hot air enters the installation cavity through the end cover 12 and enters the connecting part 21. The high-temperature hot air entering the connecting part 21 is subjected to heat exchange and cooling treatment by the circulating heat exchange part 22, and then passes through the connecting part 21 and enters the interior of the fan through the outlet 14. At this time, the temperature of the gas entering the interior of the fan is relatively reduced, thereby reducing or even avoiding damage to the internal components of the fan caused by the high-temperature hot air, thereby protecting the fan.

[0032] In the content defined in this embodiment, the positioning hole 3 on the heat dissipation part 2 is formed on the connecting part 21, and the first connecting plate 111, the connecting part 21 and the second connecting plate 121 are connected and arranged in sequence. The connecting part 21 includes a connecting shell 211 installed in the installation cavity and a heat sink 212 sealed and connected to the first connecting plate 111 and located in the installation cavity. A heat exchange cavity 2111 is formed in the connecting shell 211, and the heat exchange cavity 2111 connects the installation cavity and the outlet 14. The circulating heat exchange part 22 is arranged in the heat exchange cavity 2111 and connected to the external cooling water, so that after the high-temperature hot air enters the installation cavity, the heat can be transferred and quickly dissipated by the heat sink 212 to achieve the effect of initial cooling. After that, the high-temperature hot air enters the heat exchange cavity 2111, and the circulating heat exchange part 22 in the heat exchange cavity 2111 further exchanges heat and cools down. After that, the cooled gas enters the fan through the outlet 14.

[0033] In the content defined in this embodiment, the connecting shell 211 is a square structure, and can also be other geometric structures such as cylindrical. A heat exchange chamber 2111 of the same square shape is formed inside the connecting shell 211. A plurality of air inlets 2112 connecting the heat exchange chamber 2111 and the installation chamber are formed on the connecting shell 211. The high-temperature hot air entering the installation chamber enters the heat exchange chamber 2111 through each air inlet 2112. The plurality of air inlets 2112 are distributed at intervals on the connecting shell 211 so that the high-temperature hot air at each installation chamber can enter the heat exchange chamber 2111, so that the heat exchange effect is relatively uniform. A plurality of air outlets 2113 connecting the heat exchange chamber 2111 and the outlet 14 are formed on the connecting shell 211. The high-temperature hot air after the heat exchange treatment in the heat exchange chamber 2111 is output outside the heat exchange chamber 2111 through each air outlet 2113 until it passes through the outlet 14 and enters the fan to completely cool the high-temperature hot air. In order to separate the air inlet and air outlet of the heat exchange chamber 2111 , each air inlet 2112 is located on a side of the connecting shell 211 close to the end cover 12 , while each air outlet 2113 is distributed on a side surface of the connecting shell 211 facing the outlet 14 .

[0034] The heat sink 212 is made of a heat-conducting material and has a plurality of heat dissipation cavities 2123. The heat sink 212 has a cylindrical structure. The heat sink 212 includes a bottom plate 2121 parallel to the second connecting plate 121 and a plurality of vertical plates 2122 arranged perpendicular to the bottom plate 2121 on the side of the bottom plate 2121 facing away from the second connecting plate 121. The vertical plates 2122 are parallel to each other and spaced apart. The space between any two adjacent vertical plates 2122 is defined as a heat dissipation cavity 2123. The side of the heat dissipation cavity 2123 close to the end cover 12 passes through toward the side of the end cover 12 to connect to the installation cavity. In order to facilitate the high-temperature hot air to enter the heat dissipation cavity 2123 for preliminary cooling before entering the heat exchange cavity 2111, the connecting shell 211 is installed on the heat sink 212 and embedded in the heat sink 212. Each air inlet 2112 is respectively arranged on the side wall of the connecting shell 211 and penetrates the connecting shell 211 in the horizontal direction to respectively connect the heat exchange cavity 2111 and the heat dissipation cavity 2123. In this embodiment, a placement groove 2124 is vertically penetrated on the heat sink 212 and at a position vertically opposite to the outlet 14. The placement groove 2124 is coaxially distributed with the outlet 14. The placement groove 2124 is a square structure and is adapted to the outer contour of the connecting shell 211, so that the connecting shell 211 can be inserted into the placement groove 2124. The placement groove 2124 is formed by hollowing out the corresponding parts of the vertical plate 2122 and the bottom plate 2121. In this way, the heat dissipation cavities 2123 distributed in parallel are connected to the placement groove 2124. Each air inlet 2112 is respectively provided on the four side walls of the connecting shell 211. After the connecting shell 211 is installed in the installation slot 2124, each air inlet 2112 is connected to the heat dissipation cavity 2123 at the location. When in use, the high-temperature air first enters the installation cavity through the end cover 12, and the high-temperature hot air in the installation cavity enters the heat dissipation cavity 2123 through the open side of the heat dissipation cavity 2123. At this time, the high-temperature hot air can be cooled to a certain extent, and then the gas enters the heat dissipation cavity 2123 from the heat dissipation cavity 2123 through the air inlet 2112 for secondary cooling, thereby achieving a better cooling effect. In order to prevent the high-temperature hot air from being quickly sucked into the fan after entering the heat exchange chamber 2111, the inner diameter of the air outlet 2113 is set to be smaller than the inner diameter of the air inlet 2112, so that the speed of the high-temperature hot air entering the heat exchange chamber 2111 is higher than the speed of the gas exiting the heat exchange chamber 2111, thereby increasing the residence time of the high-temperature hot air in the heat exchange chamber 2111 to a certain extent, lengthening the heat exchange time between the high-temperature hot air and the circulating heat exchange part 22, and improving the cooling effect of the high-temperature hot air. In order to further slow down the output speed of the gas in the air outlet 2113, the air outlet 2113 is curved and opened on the connecting shell 211, so that the cross-section of the air outlet 2113 is S-shaped or wavy.In order to ensure the stability and firmness of the connection between the connecting shell 211 and the heat sink 212, positioning blocks 2125 are formed on at least two inner walls of the placement slot 2124 near the outlet 14, and each positioning block 2125 extends inwardly from the inner wall of the placement slot 2124, then bends and extends vertically toward one side of the end cover 12 to form an L shape. Among them, positioning blocks 2125 are provided on the inner walls of the placement slot 2124 on both sides parallel to the vertical plate 2122, and support blocks 2126 can be extended inwardly in the horizontal direction on the other two sides of the placement slot 2124. The support blocks 2126 are extended from the bottom plate 2121 to support the connecting shell 211. A positioning groove 2114 is formed on the side of the connecting shell 211 facing the outlet 14 and corresponding to the position of the positioning block 2125, and the positioning block 2125 can be installed in the positioning groove 2114 in the vertical direction to facilitate the positioning of the connecting shell 211. The first magnetic block can also be fixedly connected to the outer wall of the connecting shell 211, and a second magnetic block that is magnetically matched with the first magnetic block is arranged on the inner wall of the through groove 2124 and at a position corresponding to the first magnetic block. In this embodiment, the positioning hole 3 of the connecting part 21 is formed on the heat sink 212, and is formed by hollowing out the corresponding positions of the vertical plate 2122 and the bottom plate 2121.

[0035] In this embodiment, the circulating heat exchange part 22 includes a heat exchange tube spirally installed in the heat exchange cavity 2111. The heat exchange tube has two ends, and the heat exchange tube is distributed in a zigzag shape so that as many heat exchange tubes as possible are distributed in the heat exchange cavity 2111 to better cool down. Two channels are respectively opened on the connecting shell 211, one end of the two channels is connected to the heat exchange cavity 2111, and the other end of the two channels passes through the connecting shell 211. The two ends of the heat exchange tube are respectively sealed and penetrated in the two channels. In order to support the two ends of the heat exchange tube, a supporting shell is provided on the outer wall of the connecting shell 211, and a channel is formed on the supporting shell, and a mounting groove 2127 is recessed at the position corresponding to the supporting shell on the heat sink 212. When the connecting shell 211 is installed in the placement channel, the supporting shell is located in the mounting groove 2127, and the two ends of the heat exchange tube pass out of the supporting shell. Two through holes 112 are formed on the side wall of the base 11 and at the two ends of the heat exchange tube, penetrating the base 11 in the transverse direction. The two ends of the heat exchange tube pass through the two through holes 112 to pass out of the base 11, so as to be connected with the water inlet and outlet of the external cooling water. When in use, the external cooling water circulates into the heat exchange tube through the water inlet and outlet to provide cooling water.

[0036] The working method of one embodiment of the water-cooled heat dissipation wind hood and fan of the utility model is as follows: when the fan is running to extract gas through one side of the hood body 1, the external high-temperature hot air enters the installation cavity from the end cover 12 in sequence under the action of suction, and the high-temperature hot air entering the installation cavity first enters the heat dissipation cavity 2123, and the heat dissipation cavity 2123 quickly conducts the temperature of the high-temperature hot air and dissipates the heat, so that the temperature of the high-temperature hot air entering the heat dissipation cavity 2123 is reduced to a certain extent, and then the gas enters the heat exchange cavity 2111 from the heat dissipation cavity 2123 through the air inlet 2112, and the cooling water circulating in the heat exchange tube absorbs the temperature of the gas after the high-temperature hot air enters the heat exchange cavity 2111, and reduces the temperature of the high-temperature hot air in sequence, and the gas in the heat exchange cavity 2111 is output from the air outlet 2113 and enters the fan through the outlet 14, thereby reducing the temperature of the gas entering the fan.

Claims

1. A water-cooled heat dissipation fan hood, characterized in that: It includes a cover body which is hollow inside and has two through ends, and a heat dissipation part installed in the cover body. The heat dissipation part includes a connecting part installed in the cover body for connecting the two ends of the cover body, and a circulating heat exchange part arranged in the connecting part for connecting with external cooling water. The circulating heat exchange part is used to cool down the gas passing through the connecting part.

2. The water-cooled heat dissipation fan cover according to claim 1, characterized in that: The cover body includes a base and an end cover which are hollow inside and have two ends which are vertically connected. A first connecting plate is formed by a convex extension extending inwardly along the inner wall at one end of the base, and an outlet is formed along the vertical connection on the inner side of the first connecting plate. A second connecting plate which is adapted to and coaxially arranged with the first connecting plate is formed by a convex extension extending outwardly along the outer wall at one end of the end cover, and an installation cavity is formed between the first connecting plate, the second connecting plate and the base, and the connecting part and the circulating heat exchange part are both installed in the installation cavity.

3. The water-cooled heat dissipation fan cover according to claim 2, characterized in that: The cover body also includes a connecting piece for detachably connecting the first connecting plate, the connecting portion and the second connecting plate in sequence.

4. The water-cooled heat dissipation fan cover according to claim 2, characterized in that: The connecting part includes a connecting shell installed in the installation cavity, a heat exchange cavity is formed in the connecting shell, and air inlets respectively connecting the heat exchange cavity and the installation cavity and air outlets respectively connecting the heat exchange cavity and the outlet are formed on the connecting shell, and the air inlets and air outlets are both provided in plurality; the circulating heat exchange part is provided in the heat exchange cavity and connected to external cooling water.

5. The water-cooled heat dissipation fan cover according to claim 4, characterized in that: The connecting portion also includes a heat sink that is sealed and connected to the first connecting plate and is located in the mounting cavity. The heat sink is made of a heat-conducting material and has a plurality of heat dissipation cavities. The connecting shell is mounted on the heat sink. The air outlet is connected to the outlet, and the air inlet is connected to each heat dissipation cavity.

6. The water-cooled heat dissipation fan cover according to claim 5, characterized in that: A placement groove is provided on the heat sink, which passes through the heat sink vertically and is coaxially arranged and connected with the outlet. Each of the heat dissipation cavities passes through the heat sink inwardly in the horizontal direction to be connected with the placement groove. The connecting shell is sealed and connected in the placement groove. The air outlet is located on a side surface of the connecting shell facing the outlet to be connected with the outlet. The air inlet is located on the side wall of the connecting shell facing each heat dissipation cavity to be connected with the heat dissipation cavity.

7. The water-cooling heat dissipation fan cover according to claim 6, characterized in that: The inner diameter of the air outlet is smaller than the inner diameter of the air inlet, and the air outlet arc is formed on the connecting shell.

8. The water-cooling heat dissipation fan cover according to claim 7, characterized in that: A positioning block is formed on at least two inner walls of the placement slot near the outlet, which extends inward in the horizontal direction, bends, and extends vertically toward one side of the end cover. A positioning groove is formed on the connecting shell at a position corresponding to the positioning block, which is open toward the outlet and allows the positioning block to pass through.

9. The water-cooling heat dissipation fan cover according to claim 8, characterized in that: The circulating heat exchange part includes a heat exchange tube spirally installed in the heat exchange cavity, and two ends of the heat exchange tube are sequentially passed through the connecting shell and the base to respectively connect with the water inlet and water outlet of the external cooling water.

10. A fan, characterized in that: It comprises a water-cooled heat dissipation type wind hood as described in any one of claims 1 to 9.

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