Independent control box type fan

Abstract

The utility model discloses an independent control box type fan which comprises a fan frame, fan blades, a motor and a control box, and a stator seat of the motor is fixedly assembled with the fan frame; a driving plate with a driving device and a power device is arranged in the control box; the control box is positioned outside the fan frame, so that the driving plate and the motor form a mutually independent structure; an adapter plate is arranged in the motor, the adapter plate is connected with the motor, and the driving plate is connected with the adapter plate through a connecting line; the driving board is further connected with an external wire which penetrates out of the control box to be connected with a power source. In this way, the driving plate can be independent from the fan body, the driving plate and the motor are mutually independent, the heat superposition influence is avoided, a motor driving piece has more space, higher efficiency is provided, and the motor driving piece can work in a lower-temperature environment. And the adapter plate is used for realizing the connection between the motor and the driving plate, and meanwhile, the thinner magnetic shoes are used for replacing rubber magnetic strips, so that the motor with higher power can be mounted, and the performance of the fan can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to an axial flow fan mainly used in products such as the new energy industry, industrial control, servers, game equipment, air-conditioning cabinets, and smart home appliances. Background Art

[0002] Fans are used in many products, including industrial equipment, charging stations, energy storage systems, servers, automotive air conditioners, military products, computer cases, and smart appliances. Traditional fans typically install the PCBA driver board within the fan frame base or the motor stator. While this improves the overall fan's compactness, the market demands increasingly high fan performance. When high power is required, limited internal space makes it difficult to accommodate high-power driver components, impacting fan performance. The fan itself also generates significant heat during operation. Excessive coil temperature, in particular, can cause significant heat generation in the driver module and MOS on the driver board. This heat can affect fan operation, causing power reduction and sometimes even triggering overtemperature protection, impacting proper operation. Furthermore, current fan motor casings are typically 2-3mm thick, making them bulky and requiring significant power to operate. This thickness also squeezes the internal space of the motor casing. Furthermore, the motor utilizes thick rubber magnetic strips, which take up considerable space within the motor casing, forcing the use of smaller motors. For example, the 25489 axial flow fan can only use a 72 motor, and this type of motor can only reach a maximum power of 150W under the traditional structure, which will affect the performance of the fan. Utility Model Content

[0003] The utility model aims to solve the shortcomings of the existing technology and provides a fan which can reduce the influence of heat, match a larger power motor, improve the performance of the fan and adopt an independent control box.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a fan with an independent control box, including a fan frame, fan blades and a motor, the motor is installed in the fan blades, the fan blades are installed in the fan frame, and the stator seat of the motor is assembled and fixed to the fan frame, characterized in that: it also includes a control box, the control box is provided with a drive board with a drive device and a power device, the control box is located outside the fan frame so that the drive board and the motor form a mutually independent structure; an adapter plate is provided inside the motor, the adapter plate is connected to the motor, and the drive board is electrically connected to the adapter plate through a connecting line; the drive board is also connected to an external wire, and the external wire passes through the outside of the control box to connect to the power supply.

[0005] Furthermore, the control box is made of metal, the drive board is fixed in the control box by screws, and heat dissipation ventilation holes are provided on the control box.

[0006] Furthermore, the power device on the driving board includes a MOS tube, and the space where the MOS tube and the driving device are located is communicated with the outside through the heat dissipation ventilation holes.

[0007] Furthermore, the adapter plate is fixed on the stator base, and a sensing IC matching the Hall element is provided on the adapter plate.

[0008] Furthermore, the center of the fan blade is covered on the outside of the motor shell of the motor to form a layer of plastic shell.

[0009] Furthermore, several magnetic tiles are installed on the inner wall of the motor housing. Using these tiles with strong magnetic properties instead of traditional rubber magnets can increase the strength of the magnetic field, thereby improving motor efficiency. Furthermore, because the thickness of these tiles is smaller than that of the rubber magnetic strips of the same magnetic field strength, the internal space of the motor housing can be expanded.

[0010] Preferably, the number of the magnetic tiles is 8 groups, corresponding to 9 slots and 6 poles or 12 slots and 8 poles.

[0011] Furthermore, the thickness of the motor housing is 1-2 mm.

[0012] Furthermore, the connecting wires and the external wires are both connected from the side of the control box opposite to the fan body, and are fixed to the control box through sleeves and screws at the position where they are connected to the control box.

[0013] This new design separates the driver board from the fan body, creating a separate, independent structure from the motor. This removes the heat-generating electronics from the fan's interior and removes the effects of heat buildup. This allows the motor driver to have more space, providing higher efficiency and enabling operation in lower-temperature environments. An adapter plate is then used to connect the motor and driver board, and thinner magnetic tiles replace rubber magnetic strips. This allows for the installation of a higher-power motor than the original, thereby improving fan performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the fan body of the utility model;

[0016] Figure 3 This is a graph showing the relationship between air volume and air pressure of a traditional fan;

[0017] Figure 4 This is a curve diagram showing the relationship between air volume and air pressure of the present utility model.

[0018] In the figure, 1 is the fan frame, 2 is the fan blade, 21 is the rubber-coated shell, 3 is the motor shell, 4 is the magnetic tile, 5 is the stator seat, 6 is the adapter plate, 7 is the control box, 8 is the connecting wire, and 9 is the external wire. DETAILED DESCRIPTION

[0019] In this embodiment, refer to Figure 1 and Figure 2 The independent control box type fan includes a fan frame 1 (such as an aluminum frame), a fan blade 2 and a motor. The motor is installed in the fan blade 2, and the fan blade 2 is installed in the fan frame 1. The stator seat 5 of the motor is integrally formed with the fan frame 1; it also includes a control box 7, and the control box 7 is provided with a driver board (a PCBA, not shown) with a driver device module and a power device. The control box 7 is located outside the fan frame 1 so that the driver board and the motor form a mutually independent structure; an adapter board 6 is provided inside the motor, the adapter board 6 is connected to the motor, and the driver board is electrically connected to the adapter board through a connecting line 8; the driver board is also connected to an external wire 9, and the external wire 9 passes through the outside of the control box 7 to connect to the power supply.

[0020] The control box 7 is made of metal, such as aluminum alloy. The drive board is fixed in the control box 7 by screws. A radiator and heat dissipation ventilation holes can be provided on the control box 7.

[0021] The power devices on the driver board include integrated modules, MOS tubes, etc. The space where the MOS tubes and driver devices are located is connected to the outside world through the control box radiator and ventilation holes to dissipate the heat generated by the driver devices and power devices in a timely manner.

[0022] The adapter plate 6 is fixed on the stator base 5 , and a sensing IC matching the Hall element may be provided on the adapter plate 6 .

[0023] The center of the fan blade 2 is covered on the outside of the motor housing 3 to form a plastic shell 21. The plastic shell 21 can enhance the strength of the motor housing 3, thereby making the motor housing 3 thinner.

[0024] Several magnetic tiles 4 are installed on the inner wall of the motor housing 3. Using these strong magnetic tiles 4 instead of traditional rubber magnets increases the strength of the magnetic field, thereby improving motor efficiency. Furthermore, because the thickness of these tiles is smaller than that of the rubber magnet strips for the same magnetic field strength, the internal space of the motor housing can be expanded.

[0025] The number of the magnetic tiles 4 is 8 groups, corresponding to 9 slots and 6 poles or 12 slots and 8 poles.

[0026] The thickness of the motor housing 3 is 1-2 mm, for example, 1.5 mm. This increases the internal diameter of the motor housing 3 by 2-3 mm. The use of the magnetic tile 4 increases the diameter by 3-5 mm, for a total of 5-8 mm. This allows the use of a higher-power motor. For example, for a 25489 axial flow fan, the original 72-watt motor can be replaced with a 76-watt motor. The 76-watt motor has a power of up to 300W, easily increasing the fan speed to over 3000 rpm without significantly increasing heat generation.

[0027] The connecting wire 8 and the external wire 9 are connected from the side of the control box 7 opposite to the fan body, and are fixed to the control box 7 through sleeves and screws at the position where they are connected to the control box 7 to improve the stability of the connection.

[0028] In this way, the wind pressure and air volume can be increased under the same conditions. The test results are shown in Table 1 and Table 2, wherein Table 1 is the performance test results of the traditional fan, and Table 2 is the performance test results of the fan of the present invention.

[0029] Table 1 Traditional fan performance test results

[0030]

[0031] Table 2 Performance test results of the fan of the utility model

[0032]

[0033] From Table 1 and Table 2, Figure 3 and Figure 4 It can be seen that the maximum wind pressure of the fan of the present invention is 41.60 mmAq, and the maximum air volume is 1168.60 CFM (when the fan speed is 3630 rpm); while the maximum wind pressure of the traditional fan is 23.80 mmAq, and the maximum air volume is 958.90 CFM (when the fan speed is 2930 rpm). Obviously, the wind pressure and air volume of the present invention are greater than those of the traditional fan, and the performance change is more uniform and the stability is better.

[0034] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A fan with an independent control box, comprising a fan frame, fan blades and a motor, wherein the motor is mounted in the fan blades, the fan blades are mounted in the fan frame, and the stator of the motor is fixedly assembled with the fan frame, characterized in that: It also includes a control box, which is equipped with a drive board with drive devices and power devices. The control box is located outside the fan frame, so that the drive board and the motor form independent structures. An adapter board is provided inside the motor, the adapter board is connected to the motor, and the drive board is electrically connected to the adapter board through a connecting line. The drive board is also connected to an external wire, which passes through the outside of the control box to connect to the power supply.

2. The independently controlled box-type fan according to claim 1, characterized in that: The control box is made of metal, the drive plate is fixed in the control box by screws, and heat dissipation ventilation holes are provided on the control box.

3. The independently controlled box-type fan according to claim 2, characterized in that: The power devices on the driving board include MOS tubes, and the space where the MOS tubes and the driving devices are located is communicated with the outside through the ventilation holes of the heat sink.

4. The independently controlled box-type fan according to claim 1 is characterized in that: The adapter plate is fixed on the stator base, and a sensing IC matched with the Hall element is arranged on the adapter plate.

5. The independently controlled box-type fan according to claim 1 is characterized in that: The center of the fan blade is covered on the outside of the motor housing to form a plastic shell.

6. The independently controlled box-type fan according to claim 5, characterized in that: A plurality of magnetic tiles are arranged on the inner side wall of the motor housing.

7. The independently controlled box-type fan according to claim 6, characterized in that: The number of the magnetic tiles is 8 groups, corresponding to 12 slots.

8. The independently controlled box-type fan according to claim 5, characterized in that: The thickness of the motor housing is 1-2 mm.

9. The independently controlled box-type fan according to claim 1, characterized in that: The connecting wires and the external wires are both connected from the side of the control box opposite to the fan body, and are fixed to the control box through sleeves and screws at the positions where they are connected from the control box.

Images