CN215719817U

CN215719817U - Heat radiator and centrifugal fan

Info

Publication number: CN215719817U
Application number: CN202122004908.8U
Authority: CN
Inventors: 李锦彦; 唐文锋
Original assignee: Foshan City Nanhai Popula Fan Co ltd
Current assignee: Foshan City Nanhai Popula Fan Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-02-01
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses a heat dissipation device, which comprises a protective cover, wherein the end surface of the protective cover is provided with an accommodating channel, the side wall of the protective cover is circumferentially provided with an air outlet through hole, and the air outlet through hole is communicated with the accommodating channel; the heat dissipation wheel, it sets up in holding the passageway, the heat dissipation wheel includes wheel hub and blade, the wheel hub terminal surface is equipped with the installation through-hole, the central line of installation through-hole and the mutual level of central line that holds the passageway, a plurality of blades set up on the wheel hub lateral surface to dispersing all around, the heat dissipation wheel constantly guides hot-air to air-out through-hole all around discharges, improve heat absorption efficiency, need not externally put driving arrangement drive heat dissipation wheel, therefore, the cost is reduced, and operate simultaneously with centrifugal fan, convenient to use, the space occupies for a short time, the radiating efficiency is high, reduce the heat that directly transmits to the motor inside by a wide margin, adopt centrifugal heat dissipation form, absorb heat and guide side direction discharge, reduce the influence to the fan operation, compact structure.

Description

Heat radiator and centrifugal fan

Technical Field

The utility model relates to the field of heat dissipation devices, in particular to a heat dissipation device.

Background

The centrifugal fan is a machine which drives an impeller in a volute through a motor, improves the gas pressure in the fan and discharges the gas. And centrifugal fan is when long-time operation work, and the inside gas temperature of fan can be along motor shaft and clearance to motor direction transmission heat, influences the motor normal operating, consequently, people can adopt belt transmission or shaft coupling transmission isotructure fan, reduces the influence of the inside high temperature of fan to the motor, but this mode uses inconveniently, and occupation space is big, and is with high costs and inefficiency, can not fine satisfied demand.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a heat dissipation device, which solves one or more of the problems of the prior art, and provides at least one of the advantages of the present invention.

The solution of the utility model for solving the technical problem is as follows: a heat dissipation device, comprising: the end face of the protective cover is provided with an accommodating channel, and the side wall of the protective cover is circumferentially provided with an air outlet through hole which is communicated with the accommodating channel; the heat dissipation wheel is arranged in the accommodating channel and comprises a hub and blades, the end face of the hub is provided with an installation through hole, the center line of the installation through hole is horizontal to the center line of the accommodating channel, and the blades are arranged on the outer side face of the hub in a dispersing mode.

The technical scheme at least has the following beneficial effects: the peripheral motor drives the impeller in the peripheral volute to rotate, the heat dissipation device is arranged between the peripheral volute and the peripheral motor, the rear end face and the front end face of the protective cover are sealed, the protective cover and the volute are oppositely and fixedly arranged, the heat dissipation wheel is arranged on a transmission shaft of the motor through the mounting through hole, when the motor drives the transmission shaft to rotate, the centrifugal fan starts to operate, meanwhile, the heat dissipation wheel starts to rotate, generated air flow is discharged from the air outlet through hole at the side part of the protective cover, so that the accommodating channel is in a negative pressure environment, a heat source at the central shaft end of the fan is continuously generated, external cold air is absorbed into the accommodating channel, and the heat dissipation wheel continuously guides hot air to the air outlet through holes at the periphery along with the rotation of the blades, the heat absorption efficiency is improved, the heat dissipation wheel does not need to be driven by the peripheral driving device, the cost is reduced, and the heat dissipation device can operate with the centrifugal fan at the same time, the fan has the advantages that the fan is convenient to use, small in space occupation and high in heat dissipation efficiency, heat directly transmitted to the inside of the motor is greatly reduced, a centrifugal heat dissipation mode is adopted, heat is absorbed, lateral discharge is guided, influence on operation of the fan is reduced, the structure is more compact, and the fan is convenient to use in a matched mode.

As a further improvement of the above technical solution, the heat dissipation wheel further includes a chassis, the chassis is disposed on the rear end surface of the hub, and the plurality of blades are all connected to the front end surface of the chassis. The transmission shaft of peripheral hardware motor penetrates in proper order and holds passageway and installation through-hole, and carry out the drive connection to the heat dissipation wheel, the heat dissipation wheel is at the passageway internal rotation that holds of protection casing, be equipped with the chassis on wheel hub's the rear end face, and this chassis is close to fan spiral case one side, improve the regularity that holds the interior gas flow direction of passageway, reach positive radiating effect, and, can absorb the temperature that motor drive shaft distributed out, improve heat absorption area and radiating effect, also play the effect that blocks spiral case side heat, reduce the influence of high temperature to the motor, and simultaneously, connect a plurality of blades on the preceding terminal surface on chassis, improve the bulk strength of heat dissipation wheel, reduce the blade and produce the inefficacy condition such as fracture at high-speed rotatory in-process, and service life is prolonged.

As a further improvement of the technical scheme, the thickness of the blade is gradually thinned towards the front. The front side of blade is thinner, reduces the rotation resistance, improves the rotatory volume of airing exhaust of heat dissipation wheel, and then improves the intake in the protection casing, improves the radiating effect, reduces the heat of direct transmission to the motor inside.

As another improvement of the above technical solution, the width of the blade gradually decreases toward a direction away from the mounting through hole. Because the blade is when rotatory along with the wheel hub, outside cold air can enter into in the holding channel through the air-out through-hole, the absorptive axial region high-temperature air current of heat dissipation wheel then need outwards give off, cold and hot air all need pass through the air-out through-hole business turn over of protection casing circumference promptly, it diminishes gradually towards the direction of keeping away from the installation through-hole to set the width of blade, can make cold and hot gas business turn over form the convection current in turn, guide high-temperature air current discharges, prevent that the heat from gathering at the inside rotation of holding channel, improve the radiating efficiency.

As another improvement of the above technical solution, a plurality of the blades are divergently arranged on the outer side surface of the hub along a linear direction. A plurality of blades are dispersed along the linear direction and are set up on the wheel hub lateral surface for the extending direction of blade can be followed to inside air current, radially from the air-out through-hole discharge, improves air-out efficiency, and reduce cost need not consider turning to of heat dissipation wheel, is applicable to multiple fan, improves the practicality.

As another improvement of the above technical solution, a reinforcing boss is provided at the front part of the inner side surface of the shield, and the reinforcing boss is annular and centered on the accommodating passage. The heat dissipation wheel rotates in the inboard of protection casing, and the air-out through-hole undertakes promptly to air exhaust also and undertakes the effect of air inlet this moment for the inside and outside atress of antiskid cover is equipped with in the medial surface circumference of protection casing and strengthens the boss, can improve the intensity of protection casing, prevents that the heat dissipation wheel when the inside rotation of protection casing, and the protection casing from taking place to tear the inefficacy phenomenon such as, simultaneously, can improve pleasing to the eye degree.

As a further improvement of the technical scheme, a plurality of internal thread columns are circumferentially arranged on the inner side wall of the protective cover, and the reinforcing lug boss is connected with the internal thread columns. The protection casing is installed through the internal thread post to strengthen a plurality of internal thread posts of boss connection, simple to operate is swift, improves installation intensity.

As another improvement of the technical scheme, the surface of the reinforcing boss is provided with a groove. The total weight of the protective cover is reduced, the production cost is reduced, and the protective cover is convenient for a user to grab and install.

As another improvement of the above technical solution, a center line of the mounting through hole coincides with a center line of the accommodating passage. The central line of installation through-hole coincides with the central line that holds the passageway mutually for the air-out volume of advancing of every air-out through-hole is close, improves the radiating effect, makes the atress of protection casing even simultaneously, and the condition that the reduction protection casing damaged takes place.

In addition, the utility model also provides a centrifugal fan which comprises a motor, the heat dissipation device and a volute, wherein the motor is fixedly arranged from front to back, the heat dissipation device is arranged above, the heat dissipation wheel synchronously moves with a transmission shaft of the motor through the mounting through hole, an impeller is arranged in the volute, the transmission shaft of the motor extends backwards into the volute, and the transmission shaft of the motor is in driving connection with the impeller.

The technical scheme at least has the following beneficial effects: the motor drives the impeller in the volute to rotate, the heat dissipation device is arranged between the volute and the motor, the front end face and the rear end face of the protective cover are sealed, the protective cover and the volute are relatively fixedly arranged, the heat dissipation wheel is arranged on a transmission shaft of the motor through the installation through hole, when the motor drives the transmission shaft to rotate, the centrifugal fan starts to operate, meanwhile, the heat dissipation wheel starts to rotate, generated air flow is discharged from the air outlet through hole at the side part of the protective cover, so that a negative pressure environment is formed in the accommodating channel, a central shaft end heat source generated by the fan and external cold air are absorbed into the accommodating channel continuously, and the heat dissipation wheel continuously guides hot air to the air outlet through holes around along with the rotation of the blades, so that the heat absorption efficiency is improved, the cost is reduced, the heat dissipation wheel can operate with the centrifugal fan simultaneously without the need of an external driving device, the use is convenient, and the space occupation is small, the heat dissipation efficiency is high, reduces the heat that directly transmits to the motor inside by a wide margin, adopts centrifugal heat dissipation form, absorbs the heat and guides the side direction and discharges, reduces the influence to the fan operation, and the structure is compacter.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the utility model, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

Fig. 1 is a structural diagram of a heat dissipation device according to an embodiment of the present invention;

fig. 2 is an exploded view of a centrifugal fan according to an embodiment of the present invention.

In the drawings: 110-protective cover, 111-accommodating channel, 112-air outlet through hole, 113-reinforcing boss, 114-internal thread column, 115-groove, 120-heat dissipation wheel, 121-hub, 122-mounting through hole, 123-blade, 124-chassis, 210-motor, 220-volute and 230-impeller.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The technical characteristics of the utility model can be combined interactively on the premise of not conflicting with each other.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, the heat dissipation device includes a protective cover 110, an end surface of which is provided with an accommodating channel 111, a side wall of the protective cover 110 is circumferentially provided with an air outlet through hole 112, and the air outlet through hole 112 is communicated with the accommodating channel 111; the heat dissipation wheel 120 is arranged in the accommodating channel 111, the heat dissipation wheel 120 comprises a hub 121 and blades 123, an end face of the hub 121 is provided with a mounting through hole 122, a center line of the mounting through hole 122 and a center line of the accommodating channel 111 are mutually horizontal, and the blades 123 are arranged on the outer side face of the hub 121 in a manner of radiating towards the periphery. Firstly, the peripheral motor 210 drives the impeller 230 in the peripheral volute 220 to rotate, while the heat dissipation device of the present invention is disposed between the peripheral volute 220 and the peripheral motor 210, the front end surface of the rear end surface of the shield 110 is closed, the shield 110 and the volute 220 are relatively fixed, the heat dissipation wheel 120 is disposed on the transmission shaft of the motor 210 through the mounting through hole 122, specifically, when the motor 210 drives the transmission shaft to rotate, the centrifugal fan starts to operate, and at the same time, the heat dissipation wheel 120 starts to rotate, the generated wind flow is discharged from the wind outlet through hole 112 at the side of the shield 110, so that the inside of the accommodating channel 111 is in a negative pressure environment, thereby continuously absorbing the central shaft end heat source generated by the fan and the external cold air into the accommodating channel 111, and as the blades 123 rotate, the heat dissipation wheel 120 continuously guides the hot air to be discharged to the wind outlet through holes 112 at the periphery, and the shield 110 abuts against the outer wall of the peripheral volute 220, improve heat absorption efficiency, simultaneously, need not do not need peripheral hardware drive heat dissipation wheel 120, reduce cost to can operate simultaneously with centrifugal fan, facilitate the use, the space occupy for a short time, bring into cold air and can carry out the heat transfer with the heat source of central axle head, the radiating efficiency is high, reduce the heat that directly transmits to motor 210 inside by a wide margin, in addition, adopt centrifugal heat dissipation form, absorb the heat and guide side direction discharge, reduce the influence to the fan operation, the structure is compacter, convenient supporting use. In fact, the front end face or the rear end face or both of the shield 110 may not be closed, so that both ends of the accommodation channel 111 may also enter the air flow, increasing the flow possibility of the air flow.

To improve the heat dissipation effect, in some embodiments, the heat dissipation wheel 120 further includes a base plate 124, the base plate 124 is disposed on the rear end surface of the hub 121, and the plurality of blades 123 are connected to the front end surface of the base plate 124. The transmission shaft of the peripheral motor 210 sequentially penetrates into the accommodating passage 111 and the mounting through hole 122, and drives and connects the heat dissipation wheel 120, the heat dissipation wheel 120 rotates in the accommodating passage 111 of the protective cover 110, the rear end surface of the hub 121 is provided with the chassis 124, and the chassis 124 is close to one side of the fan volute 220, so that the regularity of the gas flow direction in the accommodating passage 111 is improved, a positive heat dissipation effect is achieved, the temperature dissipated by the transmission shaft of the motor 210 close to one side of the volute 220 can be absorbed, the heat absorption area and the heat dissipation effect are improved, the heat at the side of the volute 220 is blocked, the influence of high temperature on the motor 210 is reduced, meanwhile, the front end surface of the chassis 124 is connected with a plurality of blades 123, namely the rear sides of the blades 123 extend to the front end surface of the chassis 124, the overall strength of the heat dissipation wheel 120 is improved, and failure conditions such as fracture of the blades 123 in the process of high-speed rotation are reduced, the service life is prolonged. In fact, after the base plate 124 is provided, the air inside the protection cover 110 flows more regularly, and meanwhile, the length of the blades 123 can be adaptively increased, so that the heat dissipation area is increased, and the heat dissipation effect is improved. Also, in some embodiments, the thickness of the blade 123 may taper forward. The heat dissipation speed is increased, and when the front side of the blade 123 is thin, the rotation resistance can be reduced, the air discharge amount of the rotation of the heat dissipation wheel 120 is increased, and further the air inlet amount of the protection cover 110 is increased, the heat dissipation effect is increased, and the heat directly transferred to the inside of the motor 210 is reduced.

In addition, in order to improve heat dissipation efficiency, in some embodiments, the width of the blade 123 may be gradually decreased in a direction away from the mounting through-hole 122. Because blade 123 is when rotatory along with wheel hub 121, outside cold air can enter into and hold passageway 111 through air-out through-hole 112, the absorptive axial region high-temperature air current of heat dissipation wheel 120 then need outwards give off, cold and hot air all need pass through the air-out through-hole 112 business turn over of protection casing 110 circumference promptly, set the width of blade 123 into and diminish gradually towards the direction of keeping away from installation through-hole 122, can make cold and hot gas business turn over in turn to form the convection current, guide high-temperature air current discharges, prevent that the heat from gathering at the inside rotation of holding passageway 111, and the heat dissipation efficiency is improved. In fact, the shape of the blades 123 may be the same width, and the heat dissipation area may be increased.

Also, to improve practicality, the plurality of blades 123 may be divergently disposed on the outer side surface of the hub 121 in a linear direction. A plurality of blades 123 are dispersed along the rectilinear direction and are set up on wheel hub 121 lateral surface for inside air current can be followed the extending direction of blade 123, radially from air-out through-hole 112 discharge, improves air-out efficiency, and reduce cost need not consider turning to of heat dissipation wheel 120, is applicable to multiple fan, improves the practicality. In addition, the blades 123 are divergently arranged in a linear direction, and the width of the blades 123 gradually decreases towards the direction of the protective cover 110, so that the heat dissipation effect can be improved.

In addition, in some embodiments, the front portion of the inner side of the shield 110 is provided with a reinforcing boss 113, and the reinforcing boss 113 has a ring shape and is centered on the receiving passage 111. The heat dissipation wheel 120 rotates on the inner side of the protective cover 110, the air outlet through hole 112 plays a role in exhausting air and also playing a role in air intake, so that the anti-skid cover is stressed inside and outside the anti-skid cover, the reinforcing boss 113 is arranged on the circumferential direction of the inner side face of the protective cover 110, the strength of the protective cover 110 can be improved, the anti-skid cover is prevented from being torn and losing efficacy when the heat dissipation wheel 120 rotates inside the protective cover 110, and meanwhile, the reinforcing boss 113 is arranged on the inner side face of the protective cover 110, and the attractiveness can be improved. Also, in order to reduce the overall weight of the shield 110, in some embodiments, as another improvement of the above technical solution, the surface of the reinforcing boss 113 is provided with a groove 115. The overall weight of the shield 110 is reduced, the production cost is reduced, and the shield is convenient for a user to grasp and install. In addition, in some embodiments, the inner sidewall of the shield 110 is circumferentially provided with a plurality of internally threaded posts 114, and the reinforcing boss 113 is connected to the plurality of internally threaded posts 114. The protective cover 110 is installed through the internal thread columns 114, the reinforcing bosses 113 are connected with the internal thread columns 114, installation is convenient and fast, and installation strength is improved. In fact, the length of the internal threaded post 114 may be extended to be identical to the length of the shield 110, so that both end surfaces of the anti-slip cover may be screw-coupled in fixed positions, improving stability, and also, the rear side of the reinforcing boss 113 may coincide with the rear end surface of the shield 110, so that the anti-torque strength is improved when the shield 110 is mounted.

In addition, the center line of the mounting through-hole 122 coincides with the center line of the accommodating passage 111. The central line of the installation through hole 122 coincides with the central line of the accommodation channel 111, so that the air inlet and outlet amount of each air outlet through hole 112 is close, the heat dissipation effect is improved, meanwhile, the protection cover 110 is uniformly stressed, and the damage of the protection cover 110 is reduced.

The utility model also discloses a centrifugal fan, referring to fig. 2, the centrifugal fan comprises a motor 210 fixedly arranged from front to back, a heat dissipation device and a volute 220, the heat dissipation device and the volute 220 are described above, the heat dissipation wheel 120 synchronously moves with a transmission shaft of the motor 210 through the installation through hole 122, an impeller 230 is arranged in the volute 220, the transmission shaft of the motor 210 extends backwards into the volute 220, and the transmission shaft of the motor 210 is in driving connection with the impeller 230. The rear end face and the front end face of the protective cover 110 can be connected and sealed with an external positioning plate, when the motor 210 drives the transmission shaft to rotate, the centrifugal fan starts to operate, meanwhile, the heat dissipation wheel 120 starts to rotate, generated air flow is discharged from the air outlet through holes 112 at the side part of the protective cover 110, so that the inside of the accommodating channel 111 is in a negative pressure environment, a central shaft end heat source generated by the fan and external cold air are continuously absorbed into the accommodating channel 111, and the heat dissipation wheel 120 continuously guides the hot air to the air outlet through holes 112 at the periphery along with the rotation of the blades 123, the heat absorption efficiency is improved, an external driving device is not needed to drive the heat dissipation wheel 120 to rotate, the cost is reduced, the centrifugal fan can operate simultaneously, the centrifugal fan is convenient to use, the space occupation is small, the heat dissipation efficiency is high, the heat directly transferred to the inside of the motor 210 is greatly reduced, a centrifugal heat dissipation form is adopted, the heat is absorbed and is guided to be discharged laterally, the influence on the operation of the fan is reduced, and the structure is more compact. It should be noted that the rear end surface of the protective cover 110 can abut against the outer wall of the volute 220, so as to increase the heat dissipation speed. In addition, the hub 121 of the heat dissipation wheel 120 may be connected to the transmission shaft of the motor 210 by two set screws, and the two set screws are disposed at 90 ° around the mounting through hole 122, thereby improving the mounting stability.

While the preferred embodiments of the present invention have been described in detail, it should be understood that the utility model is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the utility model as defined in the appended claims.

Claims

1. A heat dissipation device, characterized in that: the method comprises the following steps:

the end face of the protective cover (110) is provided with an accommodating channel (111), the side wall of the protective cover (110) is circumferentially provided with an air outlet through hole (112), and the air outlet through hole (112) is communicated with the accommodating channel (111);

the heat dissipation wheel (120) is arranged in the accommodating channel (111), the heat dissipation wheel (120) comprises a hub (121) and blades (123), an installation through hole (122) is formed in the end face of the hub (121), the center line of the installation through hole (122) and the center line of the accommodating channel (111) are mutually horizontal, and the blades (123) are arranged on the outer side face of the hub (121) in a radiating mode towards the periphery.

2. The heat dissipating device of claim 1, wherein: the heat dissipation wheel (120) further comprises a chassis (124), the chassis (124) is arranged on the rear end face of the hub (121), and the blades (123) are connected to the front end face of the chassis (124).

3. A heat dissipating device according to claim 2, wherein: the thickness of the blade (123) becomes thinner towards the front.

4. The heat dissipating device of claim 1, wherein: the width of the blade (123) is gradually reduced towards the direction far away from the installation through hole (122).

5. The heat dissipating device of claim 1, wherein: the blades (123) are divergently arranged on the outer side face of the hub (121) along the linear direction.

6. The heat dissipating device of claim 1, wherein: the front part of the inner side surface of the protective cover (110) is provided with a reinforcing boss (113), and the reinforcing boss (113) is annular and takes the accommodating channel (111) as a center.

7. The heat dissipating device of claim 6, wherein: the inside wall circumference of protection casing (110) is equipped with a plurality of internal thread posts (114), it is a plurality of to strengthen boss (113) connection internal thread post (114).

8. The heat dissipating device of claim 6, wherein: the surface of the reinforcing boss (113) is provided with a groove (115).

9. The heat dissipating device of claim 1, wherein: the center line of the mounting through hole (122) and the center line of the accommodating passage (111) coincide with each other.

10. A centrifugal fan, its characterized in that: the heat dissipation device comprises a motor (210) fixedly arranged from front to back, a heat dissipation device according to any one of claims 1 to 9, and a volute (220), wherein the heat dissipation wheel (120) moves synchronously with a transmission shaft of the motor (210) through the mounting through hole (122), an impeller (230) is arranged in the volute (220), the transmission shaft of the motor (210) extends backwards into the volute (220), and the transmission shaft of the motor (210) is in driving connection with the impeller (230).