An inner rotor brushless blower

Abstract

The utility model discloses a kind of inner rotor brushless air blower, it aims at solving the problem of low protection level of existing outer rotor brushless air blower, easy to rust failure due to dust, while simplifying structure to facilitate production;The air blower includes flange plate, motor and impeller: flange plate side recess forms assembly groove, motor casing is fixed in assembly groove, annular air duct is formed between the two;Motor uses inner rotor brushless motor, its end cover and casing connecting place are sealed by O-ring plus gluing, end cover is equipped with multiple groups of circumferential ribs to enhance heat dissipation;Impeller is negative pressure type, is located on motor rotating shaft, negative pressure generated when rotating inhales air into end cover side, and motor casing is cooled through annular air duct.

Description

Technical Field

[0001] This utility model relates to the field of blower technology, and in particular to an internal rotor brushless blower. Background Technology

[0002] The automotive blower is a key component of automotive air conditioning. It provides a comfortable environment for passengers by promoting airflow, regulating temperature, purifying air, distributing air, enabling internal and external air circulation, and assisting in dehumidification and defogging. The working environment of commercial vehicles and engineering vehicles is harsher than that of passenger vehicles, with higher levels of moisture, dust, and oil contamination, which significantly impacts the performance of the blower.

[0003] Currently, most brushless blowers on the market are external rotor types, with sealed controllers but exposed rotors. After prolonged use, dust and rust easily accumulate on the rotor, leading to rotor jamming and blower failure—a characteristic inherent to their design. Therefore, the use of brushless blowers in commercial and engineering vehicles is limited. However, with their extended lifespan, high energy efficiency, and high-precision control, brushless blowers are poised to become the preferred choice for commercial and engineering vehicles in the future. Therefore, improving the protection level of blowers is an urgent issue to be addressed.

[0004] In view of the shortcomings of the existing technology, it is necessary to design an internal rotor brushless blower to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an internal rotor brushless blower to improve the protection level of the blower, while simplifying the structure and facilitating production.

[0006] To achieve the above and other related objectives, the technical solution provided by this utility model is: an internal rotor brushless blower, comprising:

[0007] A flange, one side of which is recessed inward to form an assembly groove;

[0008] The motor has its housing fixed in the assembly slot, and an annular air duct is formed between the motor housing and the assembly slot. The motor shaft extends out of the assembly slot.

[0009] An impeller is mounted on the shaft of the motor. The negative pressure generated during the rotation of the impeller draws air into the end cover side of the motor and dissipates heat to the motor casing through the annular air duct.

[0010] The preferred technical solution is as follows: the motor housing is provided with multiple sets of circumferentially arranged connecting lugs, and the connecting lugs are provided with screw holes; the mounting groove has multiple sets of circumferentially arranged clearance grooves formed on the groove wall, the clearance grooves are arranged one-to-one with the multiple sets of connecting lugs, the bottom end of the clearance groove is closed and provided with a through hole, the through hole is arranged corresponding to the screw hole; it also includes a bolt, the bolt passes through the through hole and is threadedly connected to the screw hole.

[0011] The preferred technical solution is that the motor is an internal rotor brushless motor.

[0012] The preferred technical solution is that the connection between the end cover of the motor and the motor housing is sealed with an O-ring and adhesive.

[0013] The preferred technical solution is that the impeller is a negative pressure impeller.

[0014] The preferred technical solution is that the end cover of the motor is provided with multiple sets of raised rib structures for heat dissipation.

[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0016] This utility model proposes an internal rotor brushless blower, which uses an internal rotor brushless motor as the drive motor. The motor is built into the flange through an assembly slot, and an annular air duct is formed between the motor housing and the assembly slot. The negative pressure generated by the impeller rotation draws air into the motor end cover side, and the air flows through the annular air duct and the motor housing, achieving effective heat dissipation for the motor. At the same time, the connection between the motor end cover and the housing adopts a double-layer sealing protection method of O-ring and adhesive coating, so that the blower can reach the protection level of IP68, which can effectively prevent external moisture and dust from entering the motor and greatly improve the reliability of the blower. In addition, the motor end cover has a newly added rib structure, which increases the heat dissipation capacity of the end cover. The overall structure is simple and easy to manufacture. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal rotor brushless blower involved in this utility model.

[0018] Figure 2 This is a schematic diagram of the flange structure involved in this utility model.

[0019] Figure 3 This is a schematic diagram of the motor structure involved in this utility model. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0021] Please see Figures 1-3 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] like Figures 1 to 3 As shown, according to a general technical concept of this utility model, an internal rotor brushless blower is provided, comprising:

[0025] Flange 1, one side of flange 1 is recessed inward to form an assembly groove 11;

[0026] Motor 2, the housing of motor 2 is fixed in the assembly slot 11, an annular air duct is formed between the housing of motor 2 and the assembly slot 11, and the rotating shaft of motor 2 extends out of the assembly slot 11.

[0027] Impeller 3 is mounted on the shaft of motor 2. The negative pressure generated during the rotation of impeller 3 draws air into the end cover side of motor 2 and dissipates heat to the casing of motor 2 through the annular air duct.

[0028] like Figures 1 to 3As shown, in an exemplary embodiment of this utility model, the housing of the motor 2 is provided with multiple sets of circumferentially arranged connecting ears 21, and the connecting ears 21 are provided with screw holes; the wall of the assembly groove 11 is formed with multiple sets of circumferentially arranged clearance grooves 111, and the multiple sets of clearance grooves 111 are arranged one-to-one with the multiple sets of connecting ears 21. The bottom end of the clearance groove 111 is closed and provided with a through hole, and the through hole is arranged corresponding to the screw hole; it also includes a bolt 4, which passes through the through hole and is threadedly connected to the screw hole. This structure is used to realize the assembly of the motor 2 housing and the flange 1, and to form an annular air duct between the motor 2 housing and the assembly groove 11.

[0029] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, motor 2 is an internal rotor brushless motor.

[0030] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the connection between the end cover of the motor 2 and the housing of the motor 2 is sealed with an O-ring and adhesive to achieve a high level of sealing effect.

[0031] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the impeller 3 is a negative pressure impeller, which can draw air into the end cover side of the motor 2 through negative pressure.

[0032] like Figures 1 to 3 As shown, in an exemplary embodiment of this utility model, the end cover of the motor 2 is provided with multiple sets of raised rib structures 22 for heat dissipation, thereby improving the heat dissipation effect of the motor 2.

[0033] Therefore, this utility model has the following advantages:

[0034] This utility model proposes an internal rotor brushless blower, which uses an internal rotor brushless motor as the drive motor. The motor is built into the flange through an assembly slot, and an annular air duct is formed between the motor housing and the assembly slot. The negative pressure generated by the impeller rotation draws air into the motor end cover side, and the air flows through the annular air duct and the motor housing, achieving effective heat dissipation for the motor. At the same time, the connection between the motor end cover and the housing adopts a double-layer sealing protection method of O-ring and adhesive coating, so that the blower can reach the protection level of IP68, which can effectively prevent external moisture and dust from entering the motor and greatly improve the reliability of the blower. In addition, the motor end cover has a newly added rib structure, which increases the heat dissipation capacity of the end cover. The overall structure is simple and easy to manufacture.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An inner rotor brushless blower, characterized by, include: A flange, one side of which is recessed inward to form an assembly groove; The motor has its housing fixed in the assembly slot, and an annular air duct is formed between the motor housing and the assembly slot. The motor shaft extends out of the assembly slot. An impeller is mounted on the shaft of the motor. The negative pressure generated during the rotation of the impeller draws air into the end cover side of the motor and dissipates heat to the motor casing through the annular air duct.

2. The internal rotor brushless blower according to claim 1, characterized in that: The motor housing is provided with multiple sets of circumferentially arranged connecting lugs, and each connecting lug is provided with a screw hole; the assembly groove wall is formed with multiple sets of circumferentially arranged clearance grooves, and each set of clearance grooves is provided in a one-to-one correspondence with a set of connecting lugs. The bottom end of each clearance groove is closed and provided with a through hole, which is provided in a corresponding manner to the screw hole; it also includes a bolt, which passes through the through hole and is threadedly connected to the screw hole.

3. An inner rotor brushless blower as defined in claim 1, characterized in that: The motor is an internal rotor brushless motor.

4. An inner rotor brushless blower as defined in claim 1, characterized in that: The connection between the end cover of the motor and the motor housing is sealed with an O-ring and adhesive.

5. An inner rotor brushless blower as defined in claim 1, wherein: The impeller is a negative pressure impeller.

6. An inner rotor brushless blower as defined in claim 1, wherein: The motor end cover is provided with multiple sets of raised rib structures for heat dissipation.

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