Multiple vibration reduction and noise reduction blower assembly

Abstract

This invention relates to the field of blower technology, specifically to a multi-stage vibration reduction and noise reduction blower assembly, comprising a housing with an internal cavity containing an air outlet and an air inlet. An elastic band is fixedly installed on the inner wall of the cavity. Two diaphragm components are also fitted onto the outer side of the bearing on the housing. A cover is fixedly installed on the outer wall of the housing, with a duct fixedly installed in its center and a flow divider installed inside. A rotating fan is rotatably connected to the housing via bearing components, with an active component fixedly installed on it. Multiple guide vanes are arranged in a ring at equal intervals on the outer wall of the rotating fan. Through the cover and the rotating fan, multiple airflow divisions are achieved, effectively guiding the airflow trajectory and greatly reducing turbulence, thus achieving noise reduction. Simultaneously, utilizing the internal and external air pressure difference during blower operation, lubricating oil is added to the bearing in an orderly manner, reducing mechanical vibration and noise generation.

Description

Technical Field

[0001] This invention relates to the field of blower technology, specifically to a multi-stage vibration reduction and noise reduction blower assembly. Background Technology

[0002] Centrifugal blowers typically consist of an impeller with multiple blades. As airflow moves from the impeller inlet to the impeller outlet, the blades cause the introduced airflow to change direction radially. The blades are usually fixed to a hub and rotate with it. Centrifugal blowers are commonly used in automotive air conditioning systems.

[0003] With societal development, the requirements for noise reduction (NVH) in automotive air conditioning systems (HVAC) are becoming increasingly stringent. However, existing blowers used in automotive air conditioning systems lack vibration and noise reduction designs, which leads to a decline in the performance of the air conditioning system and a poor user experience after a period of use. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a multi-stage vibration-damping and noise-reducing blower assembly, which effectively solves the problem that existing blowers used in automotive air conditioning systems lack vibration-damping and noise-reducing designs, resulting in compromised air conditioning system performance and a poor user experience after a period of use.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a multi-stage vibration damping and noise reduction blower assembly, including a cover, an internal cavity with an air outlet and an air inlet, an elastic band fixedly installed on the inner wall of the cavity forming a chamber, a plurality of airflow grooves communicating with the chamber in a ring-shaped structure on the cavity, a first through hole between the airflow grooves and the cavity, and a second through hole communicating with the cavity at the inner end of the airflow grooves, and two diaphragm elements are sleeved on the outer side of the bearing on the cover, forming a storage cavity for storing lubricating oil in the middle of the two diaphragm elements, with a plurality of oil outlet holes evenly distributed on the inner wall of the storage cavity; a cover body. The cover is fixedly installed on the outer wall of the cover. A duct is fixedly installed in the middle of the cover. A diverter is also installed inside the cover. The outer end of the diverter extends into the duct and a diverter block is fixedly installed. The rotating fan is rotatably connected to the cover through a bearing. An active component is fixedly installed on the rotating fan. An annular cover is fixedly installed on the active component. Multiple through slots are opened on the annular cover. Multiple guide vanes are opened in an annular pattern at equal intervals on the outer wall of the rotating fan. An air inlet slot is opened in the middle of the rotating fan. Multiple guide slots are opened in an annular structure on the inner wall of the air inlet slot. The guide slots are connected to the cavity and are located between the middle of two adjacent fan blades on the rotating fan.

[0009] Furthermore, a bending component is fixedly connected to the inner end of the conduit; the outer wall of the diverter block is adapted to the outer wall of the bending component; multiple through grooves communicating with the inside of the conduit are also provided on the diverter block, and the through grooves are respectively connected to the cavity and the air inlet groove; and an adhesive layer is provided on the outer wall of both the diverter block and the bending component.

[0010] Furthermore, the end of the air inlet slot corresponds to the position of the air inlet on the cavity; multiple guide vanes are curved devices, and the position of the guide vanes corresponds to the position of the fan blades on the rotating fan.

[0011] Furthermore, the active component is fixedly connected to the output shaft of the external motor; the bearing component is sleeved between the active component and the middle of the cover; and one end of the oil outlet is connected to the ball bearing component.

[0012] Furthermore, the sponge adheres to the inner wall of the cavity, and an air outlet is provided on the sponge at the position of the second through hole.

[0013] Furthermore, the position of the air intake slot corresponds to the position of the flow divider block. After the airflow enters from the air intake slot, it flows through the through slot into the cavity. An arc-shaped protrusion is fixedly installed on the outer wall of the annular cover near the air intake slot to disperse the airflow.

[0014] Furthermore, the inner wall of the cavity has an arc-shaped structure, and the distance between the inner circumference of the cavity and the guide vane gradually increases along the rotation direction of the rotating fan; the elastic band is laid on the inner circumference of the cavity in a bent shape.

[0015] Furthermore, the end diameter of the rotating fan is smaller than the size of the diverter; the size of the diverter is matched with the size of the air inlet of the cavity.

[0016] Beneficial effects

[0017] The technical solution provided by this invention has the following advantages compared with known public technologies:

[0018] This invention, through its cover and rotating fan, enables multiple airflow diversions and effectively guides the airflow trajectory, greatly reducing turbulence and thus achieving noise reduction. Simultaneously, by utilizing the pressure difference between the inside and outside of the blower during operation, lubricating oil is added to the bearing in an orderly manner, reducing mechanical vibration and noise generation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the external outline of the blower of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure when the cover and the lid of the present invention are separated;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the cover of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the overall cross-sectional structure of the blower of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0026] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point C;

[0027] Figure 8 For the present invention Figure 5 Enlarged structural diagram at point D;

[0028] Figure 9 This is a schematic cross-sectional view of the cover portion of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the rotating fan and the driving component of the present invention when they are separated;

[0030] Figure 11 This is a front view schematic diagram of the rotating fan structure of the present invention;

[0031] Figure 12 This is a schematic diagram of the cross-sectional structure of the cover body of the present invention;

[0032] Figure label:

[0033] 100. Cover; 101. Cavity; 102. Oil outlet;

[0034] 110. Airflow channel; 111. First through hole; 112. Second through hole;

[0035] 120. Corpus cavernosum;

[0036] 130. Elastic band;

[0037] 140. Tympanic membrane component; 141. Storage cavity;

[0038] 150. Bearing components;

[0039] 200. Cover;

[0040] 210. Conduit; 211. Bending component;

[0041] 220. Diverter component; 221. Diverter block; 222. Through slot;

[0042] 300. Rotating fan; 301. Air intake slot; 302. Guide slot;

[0043] 310. Flow deflector;

[0044] 400, Active Item;

[0045] 410. Annular cover; 411. Through groove. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] The present invention will be further described below with reference to embodiments.

[0048] Example:

[0049] See attached document Figure 1 - Appendix Figure 12 As shown, a multi-stage vibration damping and noise reduction blower assembly includes a housing 100, a cover 200, and a rotating fan 300 rotatably connected to the housing 100. A bearing 150 is disposed between the rotating fan 300 and the middle of the housing 100. An active component 400 is fixedly installed at the end of the rotating fan 300, which is used to maintain a fixed connection between the rotating fan 300 and the output shaft of an external motor, thereby driving the rotating fan 300 to rotate and achieve the function of blowing air. A cavity 101 is provided inside the housing 100, and an air outlet and an air inlet are provided on the cavity 101. It should be noted that sound is produced by vibration. Therefore, to achieve noise reduction, vibration must be reduced. For blowers, there are two main causes of vibration: one is the irregularity of gas flow, which causes gas vibration and sound generation; the other is the vibration generated at the connection between the rotating fan 300 and the housing 100 due to the rotating plate at the bearing 150. To improve the noise reduction performance of existing automotive air conditioning systems, design improvements were made to the blower's air intake method and the bearing component at position 150 to achieve vibration and noise reduction functions.

[0050] Firstly, from the perspective of air intake, rationally planning the airflow trajectory during the entire airflow process of the blower can reduce turbulence and thus achieve noise reduction. Specifically, a detachable cover 200 is provided at the air intake position on the cover 100. The cover 200 is fixed to the cover 100 by screws. A bending member 211 is fixedly connected to the inner end of the duct 210. The outer wall of the diverter 221 is adapted to the outer wall of the bending member 211. The size of the diverter 220 is adapted to the size of the air inlet of the cavity 101. The diverter 220 is also provided with multiple through slots 222 that communicate with the inside of the duct 210. 2. The cover 200 is connected to the cavity 101 and the air inlet slot 301 respectively. A duct 210 is fixedly installed in the middle of the cover 200. The duct 210 serves as the initial air intake guide for the blower. An air intake channel is opened inside the duct 210. When the rotating fan 300 connected to the cover 100 starts to rotate, due to the positive and negative pressure, air will be drawn in from the outside through the duct 210. A diverter 220 is also installed inside the cover 200. The outer end of the diverter 220 extends into the inside of the duct 210 and a diverter block 221 is fixedly installed. The diverter block 221 has an arc-shaped structure. When the airflow enters the inside of the duct 210 from the outside, the diverter block... 221 can evenly disperse the airflow and define its trajectory. It's worth noting that the air drawn in from the outside contains dust. With the generation of turbulence, the dust in the airflow increases, increasing the decibel level of noise. Therefore, in this design, both the diverter block 221 and the outer wall of the curved member 211 are provided with an adhesive layer. This adhesive layer can adhere to the dust contained in the airflow. Specifically, when external air is drawn in from the duct 210, the airflow comes into contact with the outer wall of the diverter block 221. Due to the arc-shaped design of the diverter block 221, it can increase the contact area with the airflow and simultaneously disperse the airflow. During this process, the adhesive layer adsorbs dust particles in the airflow, and when the airflow flows over the surface of the diverter 221, it is bounced onto the curved part 211. Similarly, the curved surface design increases the contact area with the airflow, thus removing dust from the airflow. It should also be noted that the airflow is drawn into the cavity 101 due to positive and negative pressure. During this process, the airflow will autonomously find the fastest way to enter the position with the lowest air pressure. Therefore, although the airflow will collide with the diverter 221 to a certain extent, no turbulence will be generated at this position. The airflow flowing through the curved part 211 will flow into the cavity 101 through the through groove 222 opened on the diverter 220.

[0051] The above describes the initial stage of the air intake method. Airflow also enters the cavity 101 through the air inlet. When entering the cavity 101, the rotating fan 300 inside the cover 100 is rotating. The end diameter of the rotating fan 300 is smaller than the size of the diverter 220. The rotating fan 300 is rotatably connected to the cover 100 via bearing 150. An active component 400 is fixedly installed on the rotating fan 300, and an annular cover 410 is fixedly installed on the active component 400. Multiple through slots 411 are provided on the annular cover 410. Multiple guide vanes 310 are provided in an annular pattern at equal intervals on the outer wall of the rotating fan 300. The end of the air intake slot 301 corresponds to the position of the air inlet on the cavity 101. The device is curved, and the position of the guide vane 310 corresponds to the position of the fan blade on the rotating fan 300. Therefore, when the airflow flows between the fan blade of the rotating fan 300 and the middle of the cavity 101, the multiple fan blades provided on the rotating fan 300 and the multiple corresponding guide vanes 310 fixedly installed at the edge of the rotating fan 300 can keep the multiple airflow channels on the surface of the rotating fan 300 fixed, thereby effectively reducing the generation of turbulence. Furthermore, an air inlet groove 301 is provided in the middle of the rotating fan 300, and multiple guide grooves 302 are provided in a ring structure on the inner wall of the air inlet groove 301. The guide grooves 302 are connected to the cavity 101 and are located between the middle of two adjacent fan blades on the rotating fan 300. Because the rotating fan 300 is designed in a divergent shape, the pressure at the air inlet of the cavity 101 is relatively high, while at the end of the rotating fan 300, the rotation speed is faster, resulting in lower pressure. This difference in air pressure drives the airflow. It is worth noting that in order to prevent frequent collisions and turbulent vibrations during the airflow, the airflow is first guided in an orderly manner by the multiple fan blades evenly arranged on the rotating fan 300. In order to avoid vibrations caused by high-speed airflow due to positive and negative pressure, this part can be understood as follows: when using the car air conditioning system and selecting the high-speed setting, the rotating fan 300 inside the blower rotates at a high speed. At this time, the fixed airflow channel cannot transmit the airflow in time, and the continuous collision of the airflow with the inner wall of the cavity 101 will cause gas vibration and noise. Therefore, in this case, in addition to being transported on the outer surface of the rotating fan 300, the airflow can also be transmitted through the air inlet slot 301 opened inside the rotating fan 300. This is referred to as the first diversion of airflow.

[0052] When airflow enters the intake slot 301, multiple guide slots 302 are provided in a ring structure on the inner wall of the intake slot 301. One end of the guide slot 302 is connected to the intake slot 301. When the airflow passes through the inside of the intake slot 301, the other end of the guide slot 302 is connected to the inside of the cavity 101. Furthermore, the outlet of the other end of the guide slot 302 is close to the edge of the rotating fan 300. Therefore, there is also a pressure difference between the two ends of the guide slot 302. As a result, some airflow will flow into the inside of the guide slot 302 and flow towards the edge of the rotating fan 300. This part is called secondary airflow diversion, which effectively relieves the airflow delivery pressure in the airflow channel between the rotating fan 300 and the inner wall of the cavity 101.

[0053] This design also incorporates a three-stage flow diversion system. Specifically, when the airflow flows within the intake slot 301, although the guide slot 302 diverts the airflow a second time, some airflow still flows into the intake slot 301 at the other end away from the intake port. The position of the intake slot 301 corresponds to the position of the diversion block 221. After flowing into the intake slot 301, the airflow passes through the through slot 411 and enters the cavity 101. An arc-shaped protrusion is fixedly installed on the outer wall of the annular cover 410 near the intake slot 301 to divert the airflow. The airflow is dispersed, allowing it to enter the cavity 101 in a regular manner. The airflow entering the cavity 101 flows towards the negative pressure position created by the rotation of the guide vane 310. At this point, combined with the active component 400 fixedly connected to the rotating fan 300, which has an annular cover 410 fixedly mounted on it, the airflow enters the interior of the annular cover 410 and then passes through the through-slot 411 on the annular cover 410 into the cavity 101. This multiple diversion method effectively avoids turbulence during airflow transmission, thus effectively mitigating airflow vibration and reducing noise in the air intake process.

[0054] The aforementioned design of the blower's air intake method, utilizing a three-stage flow diversion, effectively regulates the airflow direction, thereby significantly reducing noise caused by gas vibration. Furthermore, this design also achieves vibration reduction and noise reduction through the bearing mechanism. Specifically, an elastic band 130 is fixedly installed on the inner wall of the cavity 101, forming a chamber between the elastic band 130 and the inner wall of the cavity 101. Gas within this chamber can be re-injected through an external air intake pipe, which is equipped with a one-way valve. A one-way valve can also be appropriately installed on the airflow groove 110 to ensure that when the elastic band 130... When the gas 300 is compressed, it moves unidirectionally from the chamber to the airflow groove 110. The chamber 101 has multiple airflow grooves 110 connected to the chamber in a ring-shaped structure. A first through hole 111 is provided between the airflow groove 110 and the chamber 101, and a second through hole 112 is provided at the inner end of the airflow groove 110, connecting to the chamber 101. When the rotating fan 300 inside the chamber 101 rotates, the airflow continuously collides with the elastic band 130, causing it to deform. Since the elastic band 130 is filled with inert gas, as the outer wall of the elastic band 130 is continuously collided with the airflow, the gas in the chamber... The size of the space changes, causing gas to continuously flow into the airflow channel 110. Multiple first through holes 111 are provided in the airflow channel 110, allowing some gas to escape. A sponge 120 is installed on the inner wall of the cavity 101 at the outlet of the first through holes 111. This sponge 120 has noise reduction capabilities; when inert gas flows out from the first through holes 111, it enters the sponge 120, increasing its pore size and improving its sound insulation and noise reduction effect. The airflow continues to flow into the cavity 101 through the second through holes 112, and then... The flow is at the edge of the cavity 101. The inner wall of the cavity 101 has an arc-shaped structure, and the distance between the inner circumference of the cavity 101 and the guide vane 310 gradually increases along the rotation direction of the rotating fan 300. The elastic band 130 is laid in a bent shape on the inner circumference of the cavity 101. As the rotating fan 300 rotates, the gas will continuously accumulate. Therefore, in this case, the inner wall of the cavity 101 gradually moves away from the rotating fan 300 along the rotation direction of the rotating fan 300 to provide more space as an airflow channel, thereby reducing the continuous collision between airflows and reducing the generation of turbulence.

[0055] As described above, the elastic band 130 reduces the collision between airflow and cavity 101 while allowing the sponge 120 to expand, thus achieving better sound absorption. In this case, two diaphragm components 140 are also fitted on the outer side of the bearing on the cover 100, forming a storage cavity 141 for storing lubricating oil between the middle of the two diaphragm components 140. Multiple oil outlet holes 102 are evenly opened on the inner wall of the storage cavity 141. The driving component 400 is fixedly connected to the output shaft of the external motor; the bearing component 150 is fitted between the driving component 400 and the middle of the cover 100; and one end of the oil outlet hole 102 is connected to the ball bearing on the bearing component 150. It also includes a sponge 120 adhered to the inner wall of the cavity 101, and the sponge 120 has an air outlet hole adapted to the position of the second through hole 112. Specifically, a storage cavity 141 for storing lubricating oil is formed between the middle of the two diaphragm members 140. When the airflow flows in the airflow groove 110, and the airflow can flow on one side of one of the diaphragm members 140, compared with the other diaphragm member 140 being retained in the outside air, there is a pressure difference between the two diaphragm members 140. Therefore, when the blower is running, the lubricating oil stored between the middle of the two diaphragm members 140 will enter the interior of the bearing member 150 from the oil outlet hole 102 and coat the balls in the bearing member 150, thereby reducing the frictional vibration between the balls of the bearing member 150 and the active member 400, thereby achieving the purpose of noise reduction.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-stage vibration damping and noise reduction blower assembly, characterized in that, include: The cover (100) has a cavity (101) inside. The cavity (101) has an air outlet and an air inlet. An elastic band (130) is fixedly installed on the inner wall of the cavity (101). A chamber is formed between the elastic band (130) and the inner wall of the cavity (101). The cavity (101) has a ring-shaped structure with multiple airflow grooves (110) communicating with the chamber. A first through hole (111) is formed between the airflow groove (110) and the cavity (101). A second through hole (112) communicating with the cavity (101) is formed at the inner port of the airflow groove (110). Two diaphragm pieces (140) are also sleeved on the outer side of the bearing on the cover (100). A storage cavity (141) for storing lubricating oil is formed in the middle of the two diaphragm pieces (140). Multiple oil outlet holes (102) are evenly formed on the inner wall of the storage cavity (141). The cover (200) is fixedly installed on the outer wall of the cover (100). A conduit (210) is fixedly installed in the middle of the cover (200). A diverter (220) is also installed inside the cover (200). The outer end of the diverter (220) extends into the conduit (210) and a diverter block (221) is fixedly installed inside. A rotating fan (300) is rotatably connected to the cover (100) via a bearing (150). An active component (400) is fixedly installed on the rotating fan (300). An annular cover (410) is fixedly installed on the active component (400). Multiple through slots (411) are provided on the annular cover (410). Multiple guide vanes (310) are provided in an annular pattern at equal intervals on the outer wall of the rotating fan (300). An air inlet slot (301) is provided in the middle of the rotating fan (300). Multiple guide slots (302) are provided in an annular pattern on the inner wall of the air inlet slot (301). The guide slots (302) are connected to the cavity (101). The guide slots (302) are located between the middle of two adjacent fan blades on the rotating fan (300). The inner end of the conduit (210) is fixedly connected to a bend (211); the outer wall of the diverter block (221) is adapted to the outer wall of the bend (211); The diverter (220) is also provided with multiple through slots (222) that communicate with the inside of the conduit (210). The through slots (222) are respectively connected to the cavity (101) and the air inlet slot (301). Furthermore, an adhesive layer is provided on the outer wall of both the diversion block (221) and the bending member (211); The end of the air inlet slot (301) corresponds to the position of the air inlet on the cavity (101); Multiple guide vanes (310) are in a curved shape, and the positions of the guide vanes (310) correspond to the positions of the fan blades on the rotating fan (300); The position of the air inlet slot (301) corresponds to the position of the flow divider block (221). After the airflow enters from the air inlet slot (301), it flows through the through slot (411) and enters the cavity (101). An arc-shaped protrusion is fixedly installed on the outer wall of the annular cover (410) near the air inlet slot (301) to disperse the airflow; The inner wall of the cavity (101) has an arc-shaped structure, and along the rotation direction of the rotating fan (300), the distance between the inner circumference of the cavity (101) and the guide vane (310) gradually increases; The elastic band (130) is laid in a bent shape on the inner circumference of the cavity (101).

2. The multi-vibration damping and noise reduction blower assembly according to claim 1, characterized in that, The driving component (400) is fixedly connected to the output shaft of an external motor; The bearing component (150) is fitted between the driving component (400) and the cover (100) in the middle; and one end of the oil outlet (102) is connected to the ball on the bearing component (150).

3. The multi-vibration damping and noise reduction blower assembly according to claim 1, characterized in that, Also includes: The sponge (120) adheres to the inner wall of the cavity (101), and; An air outlet is provided on the sponge (120) at a position that matches the second through hole (112).

4. The multi-vibration damping and noise reduction blower assembly according to claim 1, characterized in that, The end diameter of the rotating fan (300) is smaller than the size of the diverter (220); The size of the diverter (220) is matched with the size of the air inlet of the cavity (101).

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