Light and thin type large-wind-power double-head fan

Abstract

The utility model relates to a light and thin type large-wind-power double-head fan which comprises a connecting cylinder, the two ends of the connecting cylinder are both connected with motors and covered with motor shells, output shafts of the motors are exposed out of the motor shells and are in transmission connection with fan blades, and the fan blades are connected with the motor shells in a sleeved mode and can rotate relative to the motor shells. First heat dissipation holes are formed in the connecting cylinder, second heat dissipation holes are formed in the motor shell, and third heat dissipation holes are formed in the fan blades; according to the utility model, the fan blade directly sleeved on the motor shaft is changed to be sleeved on the motor shell, so that the assembly structure of the fan blade and the motor is shortened, and the appearance of the product is lighter and thinner; in order to solve the problems of heating of the double motors and heat accumulation caused by the fact that the fan blades are directly installed on the motor shells, heat dissipation holes are formed in the connecting cylinder, the motor shells and the fan blades to form a heat dissipation air channel so as to improve the air exchange efficiency, and therefore the heat dissipation efficiency of the motor is improved, and a user can obtain good use experience.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a light and thin double-head fan with high wind power. Background Art

[0002] An electric fan, also known as a fan or blower, is a household appliance that uses an electric motor to rotate blades to accelerate air circulation. It is primarily used for cooling and ventilation. It is widely used in homes, classrooms, offices, shops, hospitals, and hotels.

[0003] In spacious places, such as various venues or factory workshops, the wind power of a single fan is insufficient to meet user needs, so a double-headed fan is sometimes used. However, existing double-headed fans are relatively large, or the blades are too close together, resulting in reduced wind power. In addition, multiple high-power motors will generate a lot of heat, which places certain requirements on the heat dissipation system. Therefore, a thin and lightweight double-headed fan with an excellent heat dissipation system can meet users' needs for high wind power. Utility Model Content

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a double-headed fan which is relatively light and thin and has an excellent heat dissipation system.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a light and thin double-head fan with high wind power, including a connecting tube, both ends of the connecting tube are connected to a motor and covered by a motor shell, the motor shaft of the motor is exposed outside the motor shell and is transmission-connected to the fan blades, the fan blades are sleeved with the motor shell and can rotate relative to the motor shell, the connecting tube is provided with a first heat dissipation hole, the motor shell is provided with a second heat dissipation hole, and the fan blades are provided with a third heat dissipation hole.

[0006] Furthermore, ribs are evenly distributed on the surface of the connecting tube, the first heat dissipation holes are arranged between the ribs, and the uppermost ends of the ribs are higher than the first heat dissipation holes.

[0007] Furthermore, a slot is concavely provided on the inner surface of the motor housing, and a block is convexly provided on the motor to cooperate with the slot.

[0008] Furthermore, a matching hole is provided at the front end of the motor housing, and a fixing hole matching with the matching hole is provided on the motor, and the matching hole and the fixing hole are connected by screws.

[0009] Furthermore, an airflow cavity is provided around the second heat dissipation hole, and the airflow cavity is recessed in the inner surface of the motor housing.

[0010] Further, the motor shell is provided with a shaft shoulder, and threads for mounting a fan mesh cover are arranged in front of the shaft shoulder, and the two shaft shoulders are spaced apart by L of 10-15 cm when the two motor shells are mounted.

[0011] Further, the motor shell is provided with a shaft shoulder, and threads for mounting a fan mesh cover are arranged in front of the shaft shoulder, and the two shaft shoulders are spaced apart by L of 12 cm when the two motor shells are mounted.

[0012] Further, the fan blade is provided with a fan blade cylinder, the fan blade cylinder is sleeved on the front end of the motor shell, the fan blade cylinder is provided with a avoiding cavity for avoiding the front end of the motor shell, and the third heat dissipation hole is arranged on the fan blade cylinder.

[0013] Further, the motor shaft is a flat shaft, the fan blade cylinder is provided with a flat hole matched with the motor shaft, and a limiting table with a height decreasing from the center to the periphery is protruded on the inner side of the fan blade cylinder, and the flat hole penetrates through the limiting table.

[0014] Compared with the prior art, the fan structure of the utility model has the advantages that: compared with the common fan structure on the market, a set of fan blades and motors matched with the fan blades are arranged on both ends of the connecting cylinder, so that the blowing range of the utility model is improved; the fan blades directly sleeved on the motor shaft are changed to be sleeved on the motor shell, so that the assembly structure of the fan blades and the motor is shortened, and the product appearance is more light and thin; in order to solve the heat generation of the double motors and the heat accumulation problem caused by the direct mounting of the fan blades on the motor shell, heat dissipation holes arranged on the connecting cylinder, the motor shell and the fan blades form a heat dissipation air duct to improve the air exchange efficiency, so that the heat dissipation efficiency of the utility model is improved, and users can obtain good use experience. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained without creating labor under the premise of providing the drawings.

[0016] The structures, proportions, sizes and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the utility model, so they do not have technical significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model.

[0017] Figure 1The utility model discloses a structure schematic view.

[0018] Figure 2 The utility model discloses a partial explosion map.

[0019] Figure 3 For Figure 2 The enlarged view of the middle A place.

[0020] Figure 4 The internal structure schematic view of the fan blade.

[0021] Figure 5 The internal structure schematic view of the motor shell.

[0022] Figure 6 The shaft shoulder interval schematic view.

[0023] As shown in the figure, 1, connecting cylinder;1.1, first heat dissipation hole;1.2, rib;2, motor;2.1, motor shaft;2.2, fixed hole;2.3, clamping block;3, motor shell;3.1, cooperation hole;3.2, clamping groove;3.3, second heat dissipation hole;3.4, air flow cavity;3.5, screw thread;3.6, shaft shoulder;4, fan blade;4.1, fan blade cylinder;4.1.1, flat hole;4.1.2, limiting table;4.1.3, avoiding cavity;4.2, third heat dissipation hole;5, screw. Specific implementation

[0024] The utility model will be further explained in combination with specific implementation.

[0025] In the description of the utility model, it is understood that the orientation or position relation of the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a particular orientation, structure and operation, therefore it can not be understood as the limitation of the utility model.

[0026] In addition, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, for example two, three, etc., unless otherwise specifically limited.

[0027] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0029] As shown in Figures 1-6 A light and thin double-head fan with large wind force, comprising a connecting cylinder 1, both ends of the connecting cylinder 1 are connected with a motor 2 and are covered by a motor shell 3, a motor shaft 2.1 of the motor 2 is exposed outside the motor shell 3 and is in transmission connection with a fan blade 4, the fan blade 4 is sleeved with the motor shell 3 and can rotate relative to the motor shell 3, the connecting cylinder 1 is provided with a first heat dissipation hole 1.1, the motor shell 3 is provided with a second heat dissipation hole 3.3, and the fan blade 4 is provided with a third heat dissipation hole 4.2; compared with the common fan structure on the market, a group of fan blades 4 and the matched motor 2 are arranged at both ends of the connecting cylinder 1, so that the blowing range of the utility model is improved; the fan blade 4 directly sleeved on the motor shaft 2.1 is changed to be sleeved on the motor shell 3, so that the assembly structure of the fan blade 4 and the motor 2 is shortened, and the product appearance is more light and thin; in order to solve the heating of the double motors 2 and the heat accumulation problem caused by the direct installation of the fan blade 4 on the motor shell 3, heat dissipation holes arranged on the connecting cylinder 1, the motor shell 3 and the fan blade 4 form a heat dissipation air duct to improve the air exchange efficiency, so that the heat dissipation efficiency of the utility model is improved.

[0030] Preferably, the connecting cylinder 1 is uniformly provided with ribs 1.2, the first heat dissipation hole 1.1 is arranged between the ribs 1.2, and the uppermost end of the rib 1.2 is higher than the first heat dissipation hole 1.1; after other objects cover the connecting cylinder 1, there is still a gap in front of the first heat dissipation hole 1.1, so that the air can be exchanged.

[0031] Preferably, the inner surface of the motor shell 3 is concavely provided with a clamping groove 3.2, and the motor 2 is convexly provided with a clamping block 2.3 matched with the clamping groove 3.2; the motor 2 is positioned by matching the clamping block 2.3 with the clamping groove 3.3 without contacting the motor shell 3, so that other parts of the motor 2 can be directly contacted with air, thereby improving the air circulation efficiency and the contact area of the motor 2 with air, and thus improving the heat dissipation performance.

[0032] Preferably, the front end of the motor shell 3 is provided with a matching hole 3.1, the motor 2 is provided with a fixing hole 2.2 matched with the matching hole 3.1, the matching hole 3.1 is connected with the fixing hole 2.2 through a screw 5, and the circumferential surface of the second heat dissipation hole 3.3 is provided with an air flow cavity 3.4 concavely arranged on the inner surface of the motor shell 3; the air flow cavity 3.4 reduces the contact area of the matching surface of the motor 2 and the motor shell 3, increases the contact area of the motor 2 and air, and thus improves the heat dissipation efficiency; meanwhile, the heat dissipation hole 3.3 improves the exchange efficiency of the internal part of the motor shell 3 and external air, and prevents the accumulation of hot air in the motor shell 3 from affecting the heat dissipation performance.

[0033] Preferably, the motor shell 3 is provided with a shaft shoulder 3.6, the front of the shaft shoulder 3.6 is provided with a thread 3.5 for mounting a fan mesh cover, and the interval L between the two shaft shoulders 3.6 is 10-15 cm when the two motor shells 3 are mounted; preferably, the interval L between the two shaft shoulders 3.6 is 12 cm; when the two fan blades 4 work at a close distance and blow air in opposite directions, a low pressure area is formed between the two fan blades 4 due to the influence of air flow, and the air blowing force of the fan blades 4 is weakened; according to the verification of multiple tests of the experimenters, when the installation distance of the two fan blades 4 is greater than 12 cm, the influence of the low pressure area on the air blowing force of the product will disappear; the thread 3.5 facilitates the mounting of the fan mesh cover during production, the shaft shoulder 2.6 can abut against the fan mesh cover to limit the position, and the fan blades 2 are arranged outside the fan mesh cover, so the distance between the two fan blades cannot be less than 12 cm; the fan mesh cover is a common prior art and thus is not described in detail.

[0034] Preferably, the fan blade 4 is provided with a fan blade cylinder 4.1, the fan blade cylinder 4.1 is sleeved on the front end of the motor shell 3, the fan blade cylinder 4.1 is internally provided with an avoiding cavity 4.1.3 for avoiding the front end of the motor shell 3, and the third heat dissipation hole 4.2 is arranged on the fan blade cylinder 4.1; the avoiding cavity 4.1.3 is arranged to directly sleeve the fan blade cylinder 4.1 on the motor shell 3, so as to reduce the assembly distance between the fan blade 2 and the motor shell 3, and make the product smaller in size; meanwhile, the third heat dissipation hole 4.2 is arranged to enable the air in the fan blade cylinder 4.1 and the motor shell 3 to exchange with external air, so as to take away the heat emitted by the internal motor 2 by means of air.

[0035] Preferably, the motor shaft 2.1 is a flat shaft, the fan blade cylinder 4.1 is provided with a flat hole 4.1.1 matched with the motor shaft 2.1, the inner side of the fan blade cylinder 4.1 is provided with a limiting table 4.1.2 with a height decreasing from the center to the periphery, the flat hole 4.1.1 penetrates the limiting table 4.1.2, so that the fan blade cylinder 4.1 and the motor shell 3 are not completely matched when matched, thereby reserving space for air flow to improve the heat dissipation performance; meanwhile, the flat hole 4.1.1 will be subjected to a larger force because it needs to transmit the torque of the motor shaft 2.1, and the limiting table 4.1.2 can also improve the structural strength of the matched part of the flat hole 4.1.1, thereby prolonging the service life of the product.

[0036] In the installation, the clamping block 2.3 is aligned with the clamping groove 3.2 and clamped in, then the screw 5 is used to pass through the matched hole 3.1 and the fixing hole 2.2 to connect the motor shell 3 and the motor 2, then the motor shell 3 and the motor 2 are respectively installed at both ends of the connecting cylinder 1, finally the flat hole 4.1.1 is aligned with the motor shaft 2.1 and inserted, that is, the fan blade 2 is respectively installed at both ends of the utility model.

[0037] In use, the motor 2 will emit a large amount of heat, which will be taken out from the inside of the utility model by air to prevent the heat from accumulating to cause the motor 2 to overheat and fail to work; only a small part of the motor 2 is in contact with the motor shell 3, so that the motor 2 has a large surface area in contact with air, thereby improving the heat dissipation area of the motor; the heat dissipation holes on the motor shell 3, the fan blade 4 and the connecting cylinder 1 enable air to flow, the limiting table 4.1.2 keeps a gap between the fan blade 4 and the motor shell 3 for air flow, so that air can completely flow in the utility model and take away the heat emitted by the motor 2 during operation; the design can enable the utility model to carry two high-power motors 2 and blow air to two directions at the same time, and can also enable the fan blade 2 to be directly covered on the motor shell 2 without causing heat accumulation; meanwhile, the installation spacing of the fan blade 2 is maintained to ensure that the fan blowing efficiency is maximized, thereby keeping a large air volume and making the fan as light and thin as possible.

[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A light and thin double-head fan with high wind force, characterized in that, The utility model provides a fan motor, including connecting cylinder (1), both ends of connecting cylinder (1) are connected with motor (2) and are covered through motor shell (3), motor shaft (2.1) of motor (2) is exposed to the outside with fan blade (4) transmission connection in motor shell (3), fan blade (4) is sleeved with motor shell (3) and can rotate relative to this motor shell (3), first heat dissipation hole (1.1) is arranged on connecting cylinder (1), second heat dissipation hole (3.3) is arranged on motor shell (3), third heat dissipation hole (4.2) is arranged on fan blade (4).

2. A light and thin double-head fan with large wind force according to claim 1, characterized in that, The surface of the connecting cylinder (1) is uniformly provided with ribs (1.2), the first heat dissipation hole (1.1) is arranged between the ribs (1.2), and the uppermost end of the rib (1.2) is higher than the first heat dissipation hole (1.1).

3. A light and thin double-head fan with large wind force according to claim 1, characterized in that, The inner surface of the motor shell (3) is recessed with a clamping groove (3.2), and the motor (2) is protruded with a clamping block (2.3) matched with the clamping groove (3.2).

4. A light and thin double-head fan with large wind force according to claim 3, characterized in that, The front end of the motor shell (3) is provided with a matching hole (3.1), and the motor (2) is provided with a fixing hole (2.2) matched with the matching hole (3.1), and the matching hole (3.1) and the fixing hole (2.2) are connected through a screw (5).

5. A light and thin double-head fan with large wind force according to claim 1, characterized in that, The circumferential direction of the second heat dissipation hole (3.3) is provided with an air flow cavity (3.4), and the air flow cavity (3.4) is recessed in the inner surface of the motor shell (3).

6. A light and thin double-head fan with large wind force according to claim 1, characterized in that, The motor shell (3) is provided with a shaft shoulder (3.6), a thread (3.5) for installing a fan mesh cover is arranged in front of the shaft shoulder (3.6), and the interval L between the two shaft shoulders (3.6) is 10-15 cm when the two motor shells (3) are installed.

7. A light and thin double-head fan with large wind force according to claim 6, characterized in that, The motor shell (3) is provided with a shaft shoulder (3.6), a thread (3.5) for installing a fan mesh cover is arranged in front of the shaft shoulder (3.6), and the interval L between the two shaft shoulders (3.6) is 12 cm when the two motor shells (3) are installed.

8. A light and thin double-head fan with large wind force according to claim 1, characterized in that, The fan blade (4) is provided with a fan blade cylinder (4.1), which is sleeved on the front end of the motor shell (3), the fan blade cylinder (4.1) is provided with an avoiding cavity (4.1.3) for avoiding the front end of the motor shell (3), and the third heat dissipation hole (4.2) is arranged on the fan blade cylinder (4.1).

9. A light and thin double-head fan with large wind force according to claim 8, characterized in that, The motor shaft (2.1) is a flat shaft, the fan blade cylinder (4.1) is provided with a flat hole (4.1.1) matched with the motor shaft (2.1), and the inner side of the fan blade cylinder (4.1) is protruded with a limiting table (4.1.2) with a height decreasing from the center to the periphery, and the flat hole (4.1.1) penetrates through the limiting table (4.1.2).

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