Fan

Abstract

The utility model relates to the technical field of fans, and provides a fan which comprises a rotating part, a stator part and a frame body, the rotating part is provided with a rotor magnet, a magnet holder and an impeller; the stator part is provided with a stator core, a stator coil and a circuit board; the stator part is fixed in the frame body, a rotating part is mounted in the axial direction of the stator part through a bearing, and the rotating part is surrounded by the frame body in the circumferential direction; the stator coil is electrically connected with a circuit board, and a current control element for controlling the supply of current to the coil is assembled on the circuit board; a Hall element is assembled on one side, facing the rotor magnet, of the circuit board; the circuit board is provided with a main control element, and the main control element is electrically connected with the current control element and the Hall element. The power consumption can be reduced by reducing the target rotating speed of the fan, and the circuit design cost is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan. Background Art

[0002] With the rapid development of the photovoltaic power generation industry, the market demand for inverters, which are part of the photovoltaic power generation energy storage link, has also continued to expand. As an outdoor device, photovoltaic power generation has higher environmental requirements for the inverters used inside it than ordinary household devices. For example, in rainy and snowy weather, the normal operation of the inverter must also be ensured. At this time, in order to ensure the normal operation of the inverter, the fan for cooling the inverter also needs to be designed to ensure that it can rotate and dissipate heat in rain and snow.

[0003] At present, when fans are running in water, the water resistance is large, which will lead to increased power consumption. When designing the circuit of the fan, it is necessary to design it according to higher performance specifications than ordinary fans, which leads to increased costs. For example, when selecting electronic components, it is necessary to select components with higher rated power for product design. However, in normal operation, these designs are over-designed, which increases the cost of the components. Utility Model Content

[0004] The utility model mainly solves the technical problem that when a fan is currently running in water, the power consumption will increase due to the large water resistance, and the fan needs to be designed according to higher performance specifications than ordinary fans during circuit design, which leads to increased costs. A fan is proposed, which reduces power consumption and improves circuit design costs by lowering the target speed of the fan.

[0005] The utility model provides a fan, comprising: a rotating part, a stator part and a frame;

[0006] The rotating part comprises: a rotor magnet, a magnet holder and an impeller;

[0007] The stator part comprises: a stator core, a stator coil and a circuit board;

[0008] The stator part is fixed in the frame, the stator part is axially mounted with a rotating part via a bearing, and the rotating part is circumferentially surrounded by the frame;

[0009] The stator coil is electrically connected to a circuit board, and a current control element for controlling the current supplied to the coil is mounted on the circuit board;

[0010] A Hall element is mounted on a side of the circuit board facing the rotor magnet;

[0011] The circuit board is provided with a main control element, and the main control element is electrically connected to the current control element and the Hall element.

[0012] Preferably, the stator part is filled with sealant.

[0013] Preferably, the circuit board is connected with a wire, and the wire is a waterproof wire.

[0014] Preferably, a stator mounting portion is provided on the frame; a plurality of supporting portions are provided circumferentially of the stator mounting portion, one of the supporting portions is provided with a wire accommodating groove, and the wire is led outward from the wire accommodating groove.

[0015] Preferably, the circuit board is installed above the stator mounting portion.

[0016] Preferably, the Hall element is used to collect magnetic pole information of the rotor magnet and transmit it to the main control element;

[0017] The current control element is used to collect the current value of the circuit board and transmit it to the main control element;

[0018] The main control element is preset with a peak current threshold, a threshold current duration threshold and a target number of revolutions.

[0019] Preferably, when the main control element recognizes that the current value of the fan has reached the peak current threshold and is continuously not less than the threshold current duration threshold, the main control element detects the current speed of the fan according to the magnetic pole information of the rotor magnet;

[0020] If the main control component detects that the current rotation speed of the fan is lower than the target rotation speed, it is determined that the fan is in the underwater mode and the target rotation speed of the underwater mode is reset.

[0021] Preferably, when the fan is in the underwater mode, the original target number of revolutions is restored at regular intervals, and the magnetic pole information of the rotor magnet and the current value of the circuit board are continuously detected.

[0022] The utility model provides a fan, in which a current control element, a Hall element and a main control element are arranged on a circuit board, the Hall element is used to collect the magnetic pole information of the rotor magnet, and the current control element is used to collect the current value of the circuit board. When the main control element recognizes that the current value of the fan has reached the peak current threshold and is continuously not less than the threshold current duration threshold, the main control element detects the current speed of the fan according to the magnetic pole information of the rotor magnet; if the main control element detects that the current speed of the fan is lower than the target speed, it is judged that the fan is in underwater mode, and the target speed of the underwater mode is reset. When the fan is in underwater mode, the original target speed is restored at intervals of a certain period of time, and the magnetic pole information of the rotor magnet and the current value of the circuit board are continuously detected. The utility model sets two conditions to judge whether the fan is in underwater mode. If it is in an underwater environment, the power consumption is reduced by reducing the target speed of the fan; the target speeds can be set for the underwater mode and the normal mode respectively, reducing the power consumption of the underwater environment and improving the circuit design cost. The stator part is filled with sealant, and the wire adopts a waterproof wire to ensure the waterproof performance of the fan, so that the fan can adapt to the underwater working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front structural schematic diagram of the fan provided by the utility model;

[0024] Figure 2 This is a schematic diagram of the back structure of the fan provided by the utility model;

[0025] Figure 3 It is a structural schematic diagram of the rotor magnet and the magnet retainer provided by the utility model;

[0026] Figure 4 It is a structural schematic diagram of an impeller and a circuit board provided by the utility model;

[0027] Figure 5 It is a structural schematic diagram of a stator core and a circuit board provided by the utility model.

[0028] Figure numerals: 1, frame; 2, rotor magnet; 3, magnet holder; 4, impeller; 5, stator core; 6, current control element; 7, circuit board; 8, Hall element; 9, main control element; 10, stator mounting portion; 11, support portion; 12, wire receiving groove. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the sake of ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of the contents.

[0030] like Figure 1-5 As shown, the fan provided by the embodiment of the utility model includes: a rotating part, a stator part and a frame 1.

[0031] The stator part is fixed in the frame 1, the stator part is axially mounted with a rotating part through a bearing, and the rotating part is circumferentially surrounded by the frame 1;

[0032] The rotating part comprises: a rotor magnet 2, a magnet holder 3 and an impeller 4; Figure 3 As shown, the rotor magnet 2 is mounted on the magnet holder 3, and the magnet holder 3 is mounted on the rotating shaft through the bearing. Figure 4 As shown, a plurality of blades are axially arranged on the impeller shell of the impeller 4. The impeller 4 is disposed on the rotor magnet 2 and the magnet holder 3.

[0033] The stator part comprises: a stator core 5, a stator coil and a circuit board 7; Figure 4 As shown, the stator core 5 is located inside the magnet holder 3, and the stator core 5 has a plurality of teeth evenly arranged, the teeth are arranged along the radial direction, and the stator coil is wound on the teeth.

[0034] The stator coil is electrically connected to a circuit board 7, and a current control element 6 for controlling the current supplied to the coil is mounted on the circuit board 7; a Hall element 8 (such as Figure 5 ); The circuit board 7 is provided with a main control element 9, which is electrically connected to the current control element 6 and the Hall element 8. Specifically, the current control element 6 uses a resistor dedicated to current detection, the Hall element 8 uses a Hall IC, and the main control element 9 uses a fan-specific driver chip (Muc+ pre-driver integration).

[0035] Furthermore, the stator part is filled with sealant. The circuit board 7 is connected with a wire, and the wire is a waterproof wire. The waterproof performance of the fan is ensured so that the fan can adapt to the underwater working environment. The stator mounting part 10 is provided on the frame 1; a plurality of supporting parts 11 are provided in the circumference of the stator mounting part 10, and a wire receiving groove 12 is opened on one of the supporting parts 11, and the wire is led outward from the wire receiving groove 12. The circuit board 7 is installed above the stator mounting part 10.

[0036] In this embodiment, the Hall element 8 is used to collect the magnetic pole information of the rotor magnet 2 and transmit it to the main control element 9; the current control element 6 is used to collect the current value of the circuit board 7 and transmit it to the main control element 9; the main control element 9 is preset with a peak current threshold, a threshold current duration threshold (the time can be set according to different actual fans) and a target number of revolutions. When the fan is working normally, this peak current threshold is usually not triggered. Only when the fan is underwater due to the large resistance of the water and because it is a closed-loop control, the main control element 9 will maintain the target number of revolutions by increasing the current.

[0037] When the main control component 9 recognizes that the current value of the fan has reached the peak current threshold and continues to be no less than the threshold current duration threshold (condition ① is met), the main control component 9 detects the current speed of the fan based on the magnetic pole information of the rotor magnet 2; if the main control component 9 detects that the current speed of the fan is lower than the target speed (condition ② is met), it is determined that the fan is in underwater mode and the target speed of the underwater mode is reset (it can be set according to the actual different fans).

[0038] When the fan is in underwater mode, the original target speed is restored after a certain period of time (which can be set according to different fans), and the magnetic pole information of the rotor magnet 2 and the current value of the circuit board 7 are continuously detected. That is, the current low target speed is restored to the normal target speed, and high-speed operation is attempted to be restored. If conditions ① and ② are not triggered, it means that the fan is no longer underwater and has left the underwater mode. If conditions ① and ② are met at the same time, the low target speed set in the underwater mode is maintained for operation.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that modifying the technical solutions recorded in the aforementioned embodiments, or replacing part or all of the technical features therein by equivalents, does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A fan, characterized in that: include: Rotating part, stator part and frame (1); The rotating part comprises: a rotor magnet (2), a magnet holder (3) and an impeller (4); The stator part comprises: a stator core (5), a stator coil and a circuit board (7); The stator part is fixed in the frame (1), the stator part is axially mounted with a rotating part via a bearing, and the rotating part is circumferentially surrounded by the frame (1); The stator coil is electrically connected to a circuit board (7), and a current control element (6) for controlling the current supplied to the coil is mounted on the circuit board (7); A Hall element (8) is mounted on the side of the circuit board (7) facing the rotor magnet; The circuit board (7) is provided with a main control element (9), and the main control element (9) is electrically connected to the current control element (6) and the Hall element (8).

2. The fan according to claim 1, characterized in that The stator part is filled with sealant.

3. The fan according to claim 2, characterized in that: The circuit board (7) is connected with a wire, and the wire is a waterproof wire.

4. The fan according to claim 3, characterized in that: A stator mounting portion (10) is arranged on the frame (1); a plurality of supporting portions (11) are arranged in the circumferential direction of the stator mounting portion (10); a wire receiving groove (12) is formed on one of the supporting portions (11); and the wire is led outward from the wire receiving groove (12).

5. The fan according to claim 4, characterized in that: The circuit board (7) is installed above the stator installation portion (10).

6. The fan according to claim 1 or 5, characterized in that: The Hall element (8) is used to collect magnetic pole information of the rotor magnet (2) and transmit it to the main control element (9); The current control element (6) is used to collect the current value of the circuit board (7) and transmit it to the main control element (9); The main control element (9) is preset with a peak current threshold, a threshold current duration threshold and a target number of revolutions.

7. The fan according to claim 6, characterized in that: When the main control element (9) recognizes that the current value of the fan has reached the peak current threshold and is continuously not less than the threshold current duration threshold, the main control element (9) detects the current speed of the fan according to the magnetic pole information of the rotor magnet (2); If the main control element (9) detects that the current rotation speed of the fan is lower than the target rotation speed, it is determined that the fan is in the underwater mode and the target rotation speed of the underwater mode is reset.

8. The fan according to claim 7, characterized in that: When the fan is in the underwater mode, the original target rotation speed is restored at a certain interval, and the magnetic pole information of the rotor magnet (2) and the current value of the circuit board (7) are continuously detected.

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