Small vehicle-mounted fan structure

Abstract

The utility model relates to the technical field of vehicle-mounted fans. A small vehicle-mounted fan structure comprises a front shell and a rear shell which are integrally formed through injection molding, a ventilation fan is installed in the front shell, an air inlet is formed in the front end of the front shell, a plurality of air outlets matched with the ventilation fan are formed in the outer wall of the front shell, a motor is arranged in the ventilation fan, the motor is of an outer rotor structure, and the rear shell is of an outer rotor structure. The outer rotor framework and the ventilation fan are integrally formed in an injection molding mode. The utility model provides a small vehicle-mounted fan structure which is convenient to install, small in size, high in working efficiency, capable of rapidly and stably exhausting air of a connected client side, low in noise during working and good in use feeling. The technical problems that in the prior art, when an existing vehicle-mounted air interchanger works, noise is large, the structure is single, the air interchanging speed cannot be adjusted according to the temperature in a passenger cabin, the using feeling is poor, and the using requirement is difficult to meet are solved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted fans, and in particular to a small-sized vehicle-mounted fan structure. Background Art

[0002] With the development of the economy, the automobile industry has developed rapidly. In addition to the current demands for automobile power, stability, etc., users also have higher requirements for automobile intelligence and comfort. The car cabin is a relatively sealed space, and it is often necessary to ventilate the cabin under different environments and requirements. However, the current structure of the vehicle-mounted ventilation fan is relatively simple. On the one hand, it will generate a lot of noise when working, and the user experience is not good. On the other hand, it is difficult to adjust the fan speed according to the temperature in the cabin. Therefore, it is necessary to improve it. Summary of the invention

[0003] The present invention provides a small vehicle-mounted fan structure which is easy to install, has a small size but high working efficiency, can quickly and stably discharge the air of the connected client, has low noise during operation, and provides a good user experience; the present invention solves the technical problems existing in the prior art that the current vehicle-mounted ventilation device has a large noise during operation, a single structure, cannot adjust the ventilation speed according to the temperature in the cabin, has a poor user experience, and is difficult to meet the use requirements.

[0004] The above technical problems of the present invention are solved by the following technical solutions: a small vehicle-mounted fan structure, comprising a front shell and a rear shell respectively formed by integral injection molding, a ventilation fan is installed in the front shell, the front end of the front shell is an air inlet, and the outer wall of the front shell is provided with a plurality of air outlets cooperating with the ventilation fan, and a motor is arranged in the ventilation fan, and the motor is an outer rotor structure, wherein the outer rotor frame and the ventilation fan are integrally injection molded. When working, the air inlet of the fan is connected to the client, which can be the cabin environment, and the air outlet of the fan is connected to the outside world. The fan rotates at a high speed driven by the motor, and uses centrifugal force to throw out the air in the gap between the blades. At this time, the bottom of the blade is a low-pressure area, and the low-pressure area sucks in the air, and the air in the cabin is continuously sucked away in a cycle, thereby achieving the purpose of ventilation. The motor with an outer rotor structure can output a large torque in a small volume, with high efficiency and low noise, and basically no noise interference will be generated during operation.

[0005] Preferably, two C-shaped permanent magnets are fixedly arranged inside the outer rotor frame, and a plurality of matched stators are arranged inside the outer rotor frame. The stators are built-in and drive the fan to rotate by cooperating with the permanent magnets and the outer rotor.

[0006] Preferably, the motor is a brushless motor, and the stator of the motor is a four-group winding. The brushless motor has low noise, long life, smooth operation, can output a large torque in a small volume, and provide better work.

[0007] Preferably, the rear end of the front housing is provided with a PCBA, and the lead wires of the stator on the motor are directly connected to the PCBA. The lead wires of the stator are directly connected to the PCBA without any pin connection.

[0008] Preferably, the front housing and the rear housing are fixedly connected by buckles. The front housing and the rear housing of the fan are matched with buckles without screws or other fastening accessories, which is convenient for assembly and has good working stability.

[0009] Preferably, two sets of temperature sensors are fixed in the front housing, and the two sets of temperature sensors extend to the front end and the air inlet respectively, and the other ends of the temperature sensors are connected to the PCBA. The two sets of temperature sensors in the fan can respectively collect the temperature of the cockpit and the temperature of the air inlet, and the fan speed can be adjusted according to the temperature, which is convenient for monitoring and adjustment.

[0010] Preferably, a positioning buckle is provided at the air inlet of the front housing, wherein a group of temperature sensors are fixed in the positioning buckle. The positioning hole at the air inlet of the front housing is used to facilitate fixing the temperature sensor and ensure the stability of the sensor.

[0011] Therefore, a small vehicle-mounted fan structure of the present invention has the following advantages: easy installation, the front and rear shells are assembled and fixed by snaps, the overall volume of the fan is small, but the working efficiency of the fan and the internal motor is high, the temperature of the air inlet and the cabin can be monitored to adjust the fan speed, the noise generated during operation is small, and it is comfortable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a three-dimensional structural schematic diagram of a small vehicle-mounted fan structure.

[0013] Figure 2 yes Figure 1 Schematic diagram of the main structure.

[0014] Figure 3 yes Figure 1 Schematic diagram of the top view cross-sectional structure.

[0015] Figure 4 yes Figure 1 Schematic diagram of the rear view cross-section structure of the inner and outer rotor frames.

[0016] In the figure, there are a front shell 1, a rear shell 2, a buckle 3, a ventilation fan 4, an air inlet 5, an air outlet 6, a PCBA 7, a temperature sensor 8, a positioning buckle 9, an outer rotor frame 10, and a permanent magnet 11. DETAILED DESCRIPTION

[0017] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0018] Example:

[0019] like Figure 1 and 2 As shown in Figures 3 and 4, a small vehicle-mounted fan structure includes a front shell 1 and a rear shell 2 that are respectively integrally injection-molded. The front shell 1 and the rear shell 2 are fixedly connected by a buckle 3. A ventilation fan 4 is installed in the front shell 1. An air inlet 5 is provided at the front end of the front shell 1. A plurality of air outlets 6 that cooperate with the ventilation fan 4 are provided in a ring shape on the outer wall of the front shell 1. A PCBA 7 is installed at the rear end of the front shell 1.

[0020] Two groups of temperature sensors 8 are fixedly installed in the front shell 1, and the two groups of temperature sensors 8 extend to the front end and the air inlet 5 respectively. The Linyi section of the temperature sensor 8 is connected to the PCBA7. A positioning buckle 9 is integrally injection-molded at the air inlet 5 of the front shell 1, and the temperature sensor 8 at the air inlet 5 is fixed in the positioning buckle 9.

[0021] A motor is installed in the ventilation fan 4. The motor is a brushless motor and has an outer rotor structure. The outer rotor frame 10 and the ventilation fan 4 are integrally injection molded. Two C-shaped permanent magnets 11 are fixed to the inner side of the outer rotor frame 10. A stator is fixed inside the outer rotor frame 10. The stator has four sets of windings, and the lead wires of the stator are directly connected to PCBA7.

[0022] When working, the air inlet 5 of the fan is connected to the client, which can be the cabin environment, and the air outlet 6 of the fan is connected to the outside world. The fan rotates at high speed driven by the motor, and uses centrifugal force to throw out the air in the gap between the blades. At this time, the bottom of the blade is a low-pressure area, and the low-pressure area sucks in the air. The cycle can continuously suck out the air in the cabin, thereby achieving the purpose of ventilation. The motor with an outer rotor structure can output a larger torque in a smaller volume, with high efficiency and low noise. Basically, no noise interference will be generated during operation. The front shell 1 and the rear shell 2 of the fan are matched with buckles 3, without screws or other fastening accessories, which is easy to assemble and has good working stability. The two sets of temperature sensors 8 in the fan can respectively collect the cockpit temperature and the temperature of the air inlet 5, and the fan speed can be adjusted according to the temperature, which is convenient for monitoring and adjustment.

Claims

1. A small vehicle-mounted fan structure, characterized in that: It includes a front shell and a rear shell which are respectively integrally injection molded. A ventilation fan is installed in the front shell. The front end of the front shell is an air inlet. The outer wall of the front shell is provided with a plurality of air outlets which cooperate with the ventilation fan. A motor is arranged in the ventilation fan. The motor is an outer rotor structure, wherein the outer rotor frame and the ventilation fan are integrally injection molded.

2. A small vehicle-mounted fan structure according to claim 1, characterized in that: Two C-shaped permanent magnets are fixedly arranged on the inner side of the outer rotor frame, and a plurality of matched stators are arranged inside the outer rotor frame.

3. A small vehicle-mounted fan structure according to claim 1, characterized in that: The motor is a brushless motor, and the stator of the motor has four sets of windings.

4. A small vehicle-mounted fan structure according to claim 1, characterized in that: The rear end of the front housing is provided with a PCBA, and the lead wires of the stator on the motor are directly connected to the PCBA.

5. A small vehicle-mounted fan structure according to claim 4, characterized in that: The front shell and the rear shell are fixedly connected via buckles.

6. A small vehicle-mounted fan structure according to claim 5, characterized in that: Two groups of temperature sensors are fixedly arranged in the front housing, and the two groups of temperature sensors extend to the front end and the air inlet respectively, and the other ends of the temperature sensors are connected to the PCBA.

7. A small vehicle-mounted fan structure according to claim 6, characterized in that: A positioning buckle is provided at the air inlet of the front shell, and a group of temperature sensors are fixed in the positioning buckle.

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