Abstract: The present invention relates to a balance structure of a fan, which comprises a hub and a balance slider. The hub has a circumferential portion and a top portion. The circumferential portion has a plurality of blades. The top portion is provided with a groove having a latch portion. The balance slider has a receiving portion slidingly engaging with the latch portion such that the balance slider can be slidingly disposed in the groove and the balance slider can move to a balance position automatically during the rotation of the hub. In this way, the effect of automatic balance can be achieved.

Abstract: The present invention relates to a balance structure of a fan rotor, which comprises a fan wheel and a balancing part. The fan wheel has a hub and a plurality of blades disposed on the circumferential side of the hub. The hub has a top wall connected to a sidewall. An unbalanced portion is selectively disposed on the top wall or on the sidewall. The unbalanced portion is disposed on one side of a symmetrical axis of the hub. The balancing part is disposed at the unbalanced portion such that the fan rotor is balanced.

Abstract: The present invention relates to a balance structure of a fan wheel, which comprises a hub and a plurality of blades disposed on the circumferential side of the hub. The hub has a top wall connected to a sidewall. An unbalanced portion for being removed is selectively disposed on the top wall or on the sidewall. The unbalanced portion is disposed on one side of a symmetrical axis of the hub. In this way, the weight of the fan wheel is balanced.

Abstract: The present invention relates to a balance structure of a fan, which comprises a hub and a balance slider. The hub has a circumferential portion and a top portion. The circumferential portion has a plurality of blades. The top portion is provided with a groove having a latch portion. The balance slider has a receiving portion slidingly engaging with the latch portion such that the balance slider can be slidingly disposed in the groove and the balance slider can move to a balance position automatically during the rotation of the hub. In this way, the effect of automatic balance can be achieved.

Abstract: A fan structure with non-circular circumference includes a frame, a first hub, a second hub, a transmission belt member, a first assembling member and a second assembling member. A first and a second base are provided in and protruded from a bottom of the frame. The first and the second hub are respectively mounted on the first and the second base, and a stator unit is provided between the first hub and the first base. The transmission belt member is fitted around side walls of the first and second hubs, and has a plurality of blades spaced on an outer surface thereof. The first and the second assembling member are correspondingly assembled to the tops of the first and the second hub. With the above arrangements, the fan structure can operate with largely reduced vibration and noise and can be manufactured at reduced material and production costs.

Abstract: A heat-dissipation fan includes a rotary assembly and a plurality of rotary cylinders mounted on an outer surface of the rotary assembly to serve as cylindrical fan blades of the heat-dissipation fan. The rotary assembly includes a plurality of first electrical conducting units and a second electrical conducting unit. The rotary cylinders move along with the rotary assembly when the latter rotates and are correspondingly electrically connected to the first electrical conducting units to be rotatable about their respective centerlines.

Abstract: A cooling fan structure with rotational cylindrical fan vanes includes a rotary body and multiple rotational cylindrical bodies. The rotary body includes a rotor assembly and a stator assembly corresponding to the rotor assembly for driving the rotor assembly to rotate. The rotor assembly includes a hub. The hub has a top section and a circumferential section. The rotational cylindrical bodies are rotatably disposed on the top section or the circumferential section of the hub. When the rotary body rotates, the rotational cylindrical bodies are driven by the rotary body to self-rotate.

Abstract: A series fan inclination structure includes an inclined frame body assembly, a first rotor assembly and a second rotor assembly. The inclined frame body assembly has a receiving space. The receiving space includes a first space, a second space and a flow guide passage. A first base seat is obliquely disposed in the first space. A second base seat is obliquely disposed in the second space. The flow guide passage is formed between the first and second base seats in communication with the first and second spaces. The first and second rotor assemblies are correspondingly rotatably disposed on the first and second base seats. The series fan inclination structure is able to greatly reduce the vibration and lower the noise caused by the interaction of the dipole.

Abstract: A fan salt-fog-resistant structure and a fan frame thereof. The fan salt-fog-resistant structure includes a base seat having a bearing cup and at least one flow guide body. Multiple connection bodies outward extend from the base seat. The flow guide body is disposed at a junction between the base seat and the connection bodies. The fan frame includes a main body having a first open side and a second open side and a flow passage defined therebetween. One end of the connection body is connected with the second open side. When airflow entraining moisture and salt fog flows through the junction between the base seat and the connection bodies, the flow guide body serves to guide the airflow and prevent the airflow from forming eddy, whereby the salt fog entrained by the airflow will not crystallize to form sediments at the junction between the base seat and the connection bodies.

Abstract: A fan structure includes a frame body and a fan impeller. The frame body has a base seat and an annular wall. A bearing cup upward extends from a center of the base seat. At least one groove is annularly formed on inner wall face of the annular wall. The fan impeller is pivotally disposed in the bearing cup and has a hub and multiple blades outward extending from the hub. Each blade has an end edge. At least one protrusion section outward protrudes from the end edge into the groove. According to the design of the fan structure, the protrusion section can destroy the production of the vortex of the blade of the conventional fan so as to greatly minify the strength of the vortex. Therefore, the structure of the sound field of the vortex is changed so that the noise of the fan structure is lowered.

Abstract: A series fan with support frame includes a first fan, a second fan and a hollow support frame. The support frame has a first receiving space, a second receiving space, an inlet, an outlet and an inclined passage in communication between the first and second receiving spaces. The first and second receiving spaces are respectively positioned in the support frame in adjacency to the inlet and the outlet. The first and second fans are respectively correspondingly received in the first and second receiving to spaces. A first virtual central line of the first fan and a second virtual central line of the second fan intersect each other in the inclined passage.

Abstract: A vibration damper structure and a series fan thereof. The vibration damper structure includes a first support body, a second support body and an elastic member. The first support body has a first upper end and a first lower end. The second support body has a second upper end and a second lower end. The elastic member is disposed between the first and second support bodies. The elastic member has a first support end in contact with the first lower end and a second support end in contact with the second lower end. The vibration damper structure is applied to the series fan to greatly reduce the vibration of the series fan in operation.

Abstract: A vibration damper structure and a fan thereof. The vibration damper structure includes a support body, a fixing seat and an elastic member. The support body has a lower end. The fixing seat has a tubular section. The tubular section has a protrusion end corresponding to the lower end of the support body and a receiving space. The receiving space has a bottom section. The elastic member is disposed in the receiving space of the tubular section and positioned between the support body and the fixing seat. Two ends of the elastic member are respectively in contact with the lower end of the support body and the bottom section of the receiving space. The vibration damper structure is applied to the fan to greatly reduce the vibration of the fan in operation.

Abstract: A series fan inclination structure includes an inclined frame body assembly, a first rotor assembly and a second rotor assembly. The inclined frame body assembly has a receiving space. The receiving space includes a first space, a second space and a flow guide passage. A first base seat is obliquely disposed in the first space. A second base seat is obliquely disposed in the second space. The flow guide passage is formed between the first and second base seats in communication with the first and second to spaces. The first and second rotor assemblies are correspondingly rotatably disposed on the first and second base seats. The series fan inclination structure is able to greatly reduce the vibration and lower the noise caused by the interaction of the dipole.

Abstract: A fan frame body structure and a fan with the fan frame body. The fan frame body structure includes a first fan frame body, a second fan frame body and a connection member. The connection member has a first opening and a second opening. The first and second openings are nonparallel to each other. The first and second fan frame bodies are respectively disposed at the first and second openings. The first and second fan frame bodies are inclined from each other. The first and second fan frame bodies are serially connected in a nonparallel form. Therefore, in the system, due to the resistance of the structure with such configuration, the audio frequency dipole structure is destructed so that the periodical noise and vibration characteristic are lowered.

Abstract: A fan structure with non-circular circumference includes a frame, a first hub, a second hub, a transmission belt member, a first assembling member and a second assembling member. A first and a second base are provided in and protruded from a bottom of the frame. The first and the second hub are respectively mounted on the first and the second base, and a stator unit is provided between the first hub and the first base. The transmission belt member is fitted around side walls of the first and second hubs, and has a plurality of blades spaced on an outer surface thereof. The first and the second assembling member are correspondingly assembled to the tops of the first and the second hub. With the above arrangements, the fan structure can operate with largely reduced vibration and noise and can be manufactured at reduced material and production costs.

Abstract: A series fan with support frame includes a first fan, a second fan and a hollow support frame. The support frame has a first receiving space, a second receiving space, an inlet, an outlet and an inclined passage in communication between the first and second receiving spaces. The first and second receiving spaces are respectively positioned in the support frame in adjacency to the inlet and the outlet. The first and second fans are respectively correspondingly received in the first and second receiving spaces. A first virtual central line of the first fan and a second virtual central line of the second fan intersect each other in the inclined passage.

Abstract: A fan frame body with bypass structure and a fan thereof. The fan includes a first fan, a second fan and a bypass structure. The second fan has a second frame body correspondingly serially connected with a first frame body of the first fan, whereby a first flow way of the first frame body communicates with a second flow way of the second frame body. The bypass structure is disposed in the first flow way or the second flow way. The bypass structure defines a bypass flow way on a circumference of the first flow way or the second flow way. By means of the bypass structure, without increasing the size of the fan and without increasing the consumed power of the fan, the air volume of the fan can be enhanced.

Abstract: A heat dissipation system with air sensation function includes a chassis, multiple fans, multiple air sensation units and an external control device connected to the fans. The chassis has an installation face for installing the fans thereon. The air sensation units are respectively disposed on the fans for detecting the air state of the corresponding fans to generate an air sensation signal. The external control device serves to receive the air sensation signal transmitted from the air sensation units and compare the data contained in the air sensation signal with preset data so as to control/adjust the rotational speed of the corresponding fans. Accordingly, a uniform airflow flows out of the fans to effectively lower the noise.

Abstract: A cooling fan structure includes a housing, a multistage fan wheel, and a stator-blade unit set. The housing is integrally formed and includes a first and a second frame, and a connecting spacer set connected to between the first and the second frame to define an open space therebetween. The multistage fan wheel is located in the housing and has a hub, around which a group of first and a group of second rotor blades are formed and axially spaced to define a bladeless zone on the hub between the first and the second rotor blades. The stator-blade unit set includes a first and a second stator-blade unit, which are assembled into the open space of the housing to circumferentially close the open space. The stator-blade unit set is exchangeable according to different high impedance systems to achieve different levels of high static pressure without increasing any mold-making cost.