Self-cooling air blower

Abstract

The self-cooling air blower comprises a volute, an impeller and a motor, the motor is fixedly installed on the volute through a flange plate and a flange plate rear cover, the flange plate is fixedly connected with the volute, the flange plate rear cover is connected to the side, away from the volute, of the flange plate in a buckled mode, and an installation cavity of the motor is formed by assembling the flange plate rear cover and the flange plate. The impeller is connected with the driving end of the motor, the motor drives the impeller to rotate, negative pressure is formed in the volute to suck gas into the volute, and a cooling air channel used for guiding the gas in the volute into the motor is formed between the matching faces of the flange plate and the flange plate rear cover. The heat dissipation problem of the air blower does not depend on an HVAC structure and is theoretically suitable for HVAC of any structure, so that the HVAC adaptation performance of the air blower of the structure is better, meanwhile, the cooling air volume can be correspondingly changed according to the operation rotating speed of the air blower, a heat dissipation channel directly points to an electric brush with the highest temperature rise in a motor to directly dissipate heat, and the heat dissipation efficiency is improved. The cooling effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of blower technology, specifically to a self-cooling blower. Background Technology

[0002] The automotive air conditioning blower is a key component of the automotive air conditioning system. It uses an internal motor to drive an impeller to rotate, thereby generating airflow that draws in air from inside or outside the vehicle and sends it into the air conditioning unit under centrifugal force, thus achieving air circulation and regulation.

[0003] During operation, blowers convert some electrical and mechanical energy into heat. Therefore, blower cooling must be fully considered in the design process. Current technology uses a protruding cooling duct connected to the HVAC system, requiring a dedicated outlet for the blower's cooling duct. However, some HVAC systems, due to structural limitations, lack sufficient space for an outlet to dissipate heat from the blower. Furthermore, the current blower inlet cooling system only has one cooling duct, which is insufficient for effectively cooling high-heat-generating components inside the motor (brushes). Similarly, the low heat dissipation efficiency of current technology restricts the design and application of high-power (high-heat-generating) motors. Utility Model Content

[0004] Technical objective: To address the shortcomings of existing blowers, this utility model discloses a self-cooling blower.

[0005] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] A self-cooling blower includes a volute, an impeller, and a motor. The motor is fixedly mounted on the volute via a flange and a flange cover. The flange is fixedly connected to the volute, and the flange cover is snapped onto the side of the flange away from the volute. The flange cover and the flange are assembled to form a mounting cavity for the motor. The impeller is connected to the drive end of the motor. The motor drives the impeller to rotate, creating a negative pressure that draws gas into the volute. A cooling air duct is formed between the mating surfaces of the flange and the flange cover to guide the gas from the volute into the motor.

[0007] Preferably, the flange of this invention has a concentric stepped structure with the central area higher than the surrounding area on the side surface near the volute. An air inlet is provided on the side wall between the stepped surfaces of the flange. The flange has an air inlet channel connected to the air inlet through ribs at the corresponding position on the back. A cover plate is provided on the rear cover of the flange to close the lower part of the air inlet channel. After the flange and the rear cover of the flange are assembled, the cover plate and the air inlet channel form a complete cooling air duct.

[0008] Preferably, the flange of this utility model is provided with an air inlet baffle at the air inlet position, and the surface of the air inlet baffle faces the airflow direction when the blower is running, so as to guide the gas under the impeller into the cooling air duct.

[0009] Preferably, the air inlet channel of this utility model adopts an arc-shaped structure arranged along the air inlet direction to guide the gas into the brush of the motor.

[0010] Preferably, the impeller blades of this invention have auxiliary blades at one end near the flange for enhancing the air intake of the cooling duct, and the auxiliary blades extend inward from the impeller blade body.

[0011] Beneficial effects: The self-cooling blower disclosed in this utility model has the following beneficial effects:

[0012] 1. The heat dissipation problem of the blower of this utility model does not rely on the structure of HVAC. Theoretically, it is applicable to HVAC of any structure, thus expanding the HVAC adaptability of this blower structure to be better.

[0013] 2. The present invention features a dedicated cooling air duct for the motor brushes, which improves the motor's heat dissipation and indirectly increases the motor's efficiency. Under the premise of maintaining the same structure, it is possible to design a motor with higher power, thus expanding the application scenarios of the motor.

[0014] 3. This utility model provides auxiliary blades at the lower part of the blades to enhance the negative pressure effect at the lower part of the blades, thereby increasing the air intake of cooling air and ensuring the cooling effect.

[0015] 4. The cooling air duct and air inlet baffle of this utility model adopt an arc-shaped structure to reduce gas flow resistance and facilitate the passage of cooling air. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a structural diagram of the blower of this utility model;

[0018] Figure 2 This is a structural diagram of the flange surface of this utility model;

[0019] Figure 3 This is a structural diagram of the back of the flange of this utility model;

[0020] Figure 4 This is a structural diagram of the flange rear cover of this utility model;

[0021] Figure 5 This is a structural diagram of the impeller of this utility model;

[0022] Figure 6 This is a schematic diagram of the cooling airflow cooling the brush in this utility model.

[0023] Among them, 1-volute, 2-impeller, 3-motor, 4-flange, 5-flange rear cover, 6-air inlet, 7-air inlet channel, 8-cover plate, 9-air inlet baffle, 10-brush, 11-auxiliary blade. Detailed Implementation

[0024] Reference will now be made in detail to embodiments of the present disclosure, one or more of which are set forth herein. Each embodiment and example is provided by way of explanation of the apparatus, composition, and materials of the present disclosure, and not by way of limitation. Rather, the following description provides convenient illustrations for implementing exemplary embodiments of the present disclosure. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the teachings of the present disclosure without departing from the scope or spirit of the present disclosure.

[0025] like Figures 1-5 As shown, this utility model discloses a self-cooling blower, including a volute 1, an impeller 2, and a motor 3. The motor 3 is fixedly mounted on the volute 1 via a flange 4 and a flange rear cover 5. The flange 4 is fixedly connected to the volute 1, and the flange rear cover 5 is fastened to the side of the flange 4 away from the volute 1. The flange rear cover 5 and the flange 4 are assembled to form the mounting cavity of the motor 3. The impeller 2 is connected to the drive end of the motor 3. The motor 3 drives the impeller 2 to rotate, creating a negative pressure that draws gas into the volute 1. A cooling air duct is formed between the mating surfaces of the flange 4 and the flange rear cover 5 to guide the gas in the volute 1 into the motor 3.

[0026] To facilitate the flow of gas within the blower and ensure its smooth entry into the cooling duct, such as... Figures 2-4 As shown, the flange 4 of this invention adopts a concentric stepped structure with the central area higher than the surrounding area on the side surface near the volute. An air inlet 6 is provided on the side wall between the stepped surfaces of the flange. An air inlet baffle 9 is provided at the air inlet 6 position of the flange 4. The surface of the air inlet baffle 9 faces the airflow direction when the blower is running, guiding the gas under the impeller 2 into the cooling air duct. An air inlet channel 7 connected to the air inlet 6 is formed by ribs on the back of the flange 4. A cover plate 8 is provided on the rear cover 6 of the flange to close the lower part of the air inlet channel 7. After the flange 4 and the rear cover 5 of the flange are assembled, the cover plate 8 and the air inlet channel 7 form a complete cooling air duct. Preferably, the air inlet channel 7 and the air inlet baffle 9 of this invention adopt an arc-shaped structure arranged along the air intake direction, guiding the gas into the brush 10 of the motor 3, reducing the flow resistance of the cooling gas, and further improving the cooling effect.

[0027] Under normal operating conditions, most of the blower's intake air enters the blower's duct through the impeller, resulting in a relatively small total gas volume at the four flange locations. Even with inlet baffles or other structures to guide the gas flow, it's impossible to effectively guarantee the intake volume of the cooling duct. Therefore, such as Figure 5 As shown, the impeller 2 of this utility model has an auxiliary blade 11 at one end near the flange to enhance the air intake of the cooling duct. The auxiliary blade 11 extends inward from the impeller blade body. When the blower is running, the auxiliary blade 11 increases the amount of gas in this area, thereby ensuring that enough gas enters the cooling duct from the air inlet 6, reaches the motor brush 10, completes the heat exchange with the brush, and re-enters the blower's gas circulation from the motor outlet.

[0028] The blower structure of this utility model can automatically introduce the gas entering the blower to cool the motor and other components as the blower runs. In addition to the embodiments provided by this utility model, those skilled in the art can add corresponding cooling air ducts based on the cooling and temperature reduction requirements without departing from the design concept of this utility model, but this will not depart from the protection scope of this utility model.

Claims

1. A self-cooling blower, characterized in that, The device includes a volute (1), an impeller (2), and a motor (3). The motor (3) is fixedly mounted on the volute (1) via a flange (4) and a flange back cover (5). The flange (4) is fixedly connected to the volute (1), and the flange back cover (5) is fastened to the side of the flange (4) away from the volute (1). The flange back cover (5) and the flange (4) are assembled to form the mounting cavity of the motor (3). The impeller (2) is connected to the drive end of the motor (3). The motor (3) drives the impeller (2) to rotate, creating a negative pressure that draws gas into the volute (1). A cooling air duct is formed between the mating surfaces of the flange (4) and the flange back cover (5) to guide the gas in the volute (1) into the motor (3).

2. The self-cooling blower according to claim 1, characterized in that, The flange (4) near the volute has a concentric stepped structure with the central area higher than the surrounding area. An air inlet (6) is provided on the side wall between the flange steps. The flange (4) forms an air inlet channel (7) connected to the air inlet (6) through ribs at the corresponding position on the back. A cover plate (8) is provided on the flange back cover (5) to close the lower part of the air inlet channel (7). After the flange (4) and the flange back cover (5) are assembled, the cover plate (8) and the air inlet channel (7) form a complete cooling air duct.

3. A self-cooling blower according to claim 2, characterized in that, The flange (4) is provided with an air inlet baffle (9) at the air inlet (6) position. The surface of the air inlet baffle (9) faces the airflow direction when the blower is running, and guides the gas under the impeller (2) into the cooling air duct.

4. A self-cooling blower according to claim 2, characterized in that, The air intake channel (7) adopts an arc-shaped structure set along the air intake direction to guide the gas into the brush (10) of the motor (3).

5. A self-cooling blower according to claim 1, characterized in that, The blades of the impeller (2) are provided with auxiliary blades (11) at one end near the flange to enhance the air intake of the cooling duct. The auxiliary blades (11) extend inward from the impeller blade body.

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