A type of automotive air conditioning blower

Abstract

This utility model relates to the field of blower technology and discloses a vehicle air conditioning blower. It includes a housing and an impeller located inside the housing. The impeller is rotatably connected to the housing. A cover plate is provided at the top opening of the housing. The cover plate rotates synchronously with the impeller. A circular air inlet is opened at the center of the cover plate. The cover plate is hollow, forming a receiving space. A sliding sealing structure is provided within the receiving space, which allows the air inlet to be opened or closed. By setting a cover plate that rotates synchronously with the impeller and providing a sliding sealing structure within the cover plate, the air inlet can be opened or closed according to the working or non-working state of the blower. Especially in the non-working state, closing the air inlet can prevent dust, moisture, and other impurities in the air from entering the blower through the air inlet, protecting the health and safety of vehicle occupants during subsequent use, ensuring the normal operation of the blower, and extending its service life.

Description

Technical Field

[0001] This utility model belongs to the field of blower technology, specifically relating to a vehicle air conditioning blower. Background Technology

[0002] The automotive air conditioning blower is one of the core components of a car's air conditioning system. Its main function is to generate airflow and propel air within the system. The working principle is as follows: a motor drives an impeller to rotate at high speed, drawing air in axially, accelerating it through centrifugal force, and then throwing it radially out, creating a high-pressure airflow.

[0003] Patent (CN220059974U) discloses an automotive air conditioning blower, including a housing, a motor, and fan blades. The bottom of the fan blades is connected to a rolling friction assembly for reducing friction, and a support plate for supporting the fan blades is fixed inside the housing. The support plate is equipped with a bearing, and the bearing is equipped with a drive roller. One end of the drive roller is connected to the output end of the motor, and the other end of the drive roller is connected to the bottom of the fan blades. The rolling friction assembly includes a fixed plate connected to the bottom of the fan blades, and an annular groove is formed on the bottom surface of the fixed plate. The rolling assembly is arranged in the annular groove. An annular track is provided at the upper end of the support plate, and the bottom of the rolling assembly is in contact with the annular track.

[0004] Its advantages lie in the fact that while driving the fan blades to rotate, the ball bearings slide inside the annular track. The ball bearings reduce the friction between the fan blades and the support plate, changing sliding friction into rolling friction, which further reduces the resistance generated when the fan blades rotate and reduces the noise generated when the fan blades are working. However, it also has the following disadvantages: when the blower is not in operation, dust, moisture and other impurities in the air will enter the blower through the air inlet on the top of the casing. On the one hand, this causes serious dust accumulation inside the blower and a large number of bacteria to multiply, which will endanger the life and health of the people in the vehicle during subsequent use. On the other hand, moisture and other impurities will cause rust or even corrosion to the internal structure of the blower, thereby affecting the normal operation and service life of the blower. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a vehicle air conditioning blower to solve the technical problem that the air inlet of the blower cannot be closed when it is not in operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vehicle air conditioning blower includes a housing and an impeller located inside the housing. The impeller is rotatably connected to the housing. A cover plate is provided at the top opening of the housing. The cover plate rotates synchronously with the impeller. A circular air inlet is opened at the center of the cover plate. The cover plate is hollow and forms a receiving space. A sliding sealing structure is provided in the receiving space to open or close the air inlet. The sliding sealing structure includes four fan-shaped partitions spaced around the edge of the air inlet and outlet. The central angle of the partitions is 90°. A sliding channel is formed between adjacent partitions. A sealing element is slidably connected in the sliding channel. The sealing element includes a fan-shaped sealing plate and an extension plate located on one side of the arc surface of the fan-shaped sealing plate. The central angle of the fan-shaped sealing plate is 90°. The four fan-shaped sealing plates form a circular plate with the same diameter as the air inlet, thereby sealing the air inlet. An elastic element is provided between the extension plate and the side wall of the receiving space to provide elastic support for the extension plate.

[0008] Furthermore, the center of the partition coincides with the edge of the air inlet, and the curved surface of the partition fits against the side wall of the accommodating space.

[0009] Furthermore, the center of the fan-shaped sealing plate coincides with the center of the air inlet, and the arc surface of the fan-shaped sealing plate coincides with the edge of the air inlet;

[0010] Furthermore, the width of the extension plate is the same as the width of the sliding channel, the extension plate is in smooth contact with the side partitions, and the extension plate is always within the sliding channel;

[0011] Furthermore, the elastic element is a spring, which extends along the depth direction of the sliding channel. One end of the spring is fixed to the extension plate, and the other end of the spring is fixed to the side wall of the receiving space. When the spring is in its natural state, the block fan-shaped sealing plate surrounds and forms a circular plate, completely sealing the air inlet.

[0012] Furthermore, an air outlet is provided at the waist of the side wall, and an air outlet duct is connected to the air outlet;

[0013] Furthermore, the impeller includes a mounting plate at the bottom and a retaining ring at the top. A blade extending axially is provided between the mounting plate and the retaining ring. A cover plate is located above the retaining ring, and the cover plate and the retaining ring are connected and fixed by an axially extending connecting rod.

[0014] The beneficial effects of this utility model are as follows:

[0015] Compared with existing technologies, by setting a cover plate that rotates synchronously with the impeller and setting a sliding sealing structure inside the cover plate, the air inlet can be opened or closed according to the working or non-working state of the blower. Especially when the blower is not working, closing the air inlet can prevent dust, moisture and other impurities in the air from entering the blower through the air inlet, avoiding serious dust accumulation and bacterial growth inside the blower, and protecting the health of the people in the vehicle during subsequent use. It can also prevent moisture and other impurities from causing rust or even corrosion to the internal structure of the blower, ensuring the normal operation of the blower and extending its service life. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a schematic diagram of the overall structure of the vehicle air conditioner blower in Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the vehicle air conditioner blower in Embodiment 1 of this utility model (hidden housing and air outlet duct).

[0019] Figure 3 This is a cross-sectional view of the vehicle air conditioner blower in Embodiment 1 of this utility model;

[0020] Figure 4 This is a front view of the cover plate in Embodiment 1 of this utility model;

[0021] Figure 5 for Figure 4 A cross-sectional view along the AA direction (view from top to bottom).

[0022] The following labels are shown in the attached diagram:

[0023] 1. Housing, 101. Base plate, 102. Side wall, 103. Air outlet duct, 2. Impeller, 201. Blade, 202. Mounting plate, 203. Fixing ring, 204. First bearing, 3. Motor, 4. Cover plate, 401. Air inlet, 402. Second bearing, 403. Connecting rod, 5. Sliding sealing structure, 501. Partition, 502. Sliding channel, 503. Sealing component, 504. Fan-shaped sealing plate, 505. Extension plate, 506. Elastic element. Detailed Implementation

[0024] Example 1, specifically as follows Figures 1-5 As shown.

[0025] A vehicle air conditioning blower includes a housing 1 and an impeller 2 located inside the housing 1. The impeller 2 is rotatably connected to the housing 1. A cover plate 4 is provided at the top opening of the housing 1. The cover plate 4 rotates synchronously with the impeller 2. A circular air inlet 401 is opened at the center of the cover plate 4. An air outlet duct 103 is connected to the side wall 102 of the housing 1. A sliding sealing structure 5 is provided inside the cover plate 4, which enables the air inlet 401 to be opened or closed.

[0026] like Figure 1 As shown, the shell 1 is cylindrical in shape with an opening at the top. The shell 1 is formed by a circular base plate 101 and a cylindrical side wall 102. The base plate 101 and the side wall 102 are welded and fixed together. An air outlet is provided at the waist of the side wall 102. An air outlet duct 103 is connected to the air outlet. External air enters the blower from the air inlet 401, and the flow rate is increased by the high-speed rotating impeller 2. Then it is discharged from the air outlet duct 103.

[0027] The internal space of the shell 1 is provided with such Figure 2 The impeller 2 shown includes a mounting plate 202 at the bottom and a retaining ring 203 at the top. A gap exists between the mounting plate 202 and the base plate 101 in the height direction. The retaining ring 203 is located below the opening at the top of the housing 1. The vertical projection of the retaining ring 203 is located at the edge of the mounting plate 202. In this embodiment, the outer diameter of the retaining ring 203 is the same as the outer diameter of the mounting plate 202.

[0028] Axially extending blades 201 are provided between the mounting plate 202 and the fixing ring 203. The blades 201 are evenly spaced along the circumferential direction, and their upper and lower ends are welded and fixed to the fixing ring 203 and the mounting plate 202, respectively. It should be explained in detail that, in the horizontal direction, a first bearing 204 is provided between the mounting plate 202 and the side wall 102. Specifically, an annular gap is formed between the side surface of the mounting plate 202 and the inner wall surface of the side wall 102. The first bearing 204 is disposed in this annular gap. The inner ring of the first bearing 204 is interference-fitted with the side surface of the mounting plate 202, and the outer ring of the first bearing 204 is welded and fixed to the inner wall surface of the side wall 102. By providing the first bearing 204, the impeller 2 can rotate relative to the housing 1.

[0029] At the center of the mounting plate 202, a boss is formed by arching in the direction away from the base plate 101. A connecting hole is provided at the center of the top surface of the boss. The interior of the boss forms an installation space. A motor 3 is installed in the installation space. The motor 3 is fixedly connected to the base plate 101 by bolts. The output shaft of the motor 3 extends into the connecting hole on the top surface of the boss and is fixed by a key connection.

[0030] like Figure 3As shown, the cover plate 4 at the top opening is rotatably connected to the side wall 102, meaning the cover plate 4 can rotate relative to the housing 1. Specifically, an annular gap is also formed between the side surface of the cover plate 4 and the inner wall surface of the side wall 102. A second bearing 402 is installed in the annular gap. The inner ring of the second bearing 402 is interference-fitted with the side surface of the cover plate 4, and the outer ring of the second bearing 402 is welded and fixed to the inner wall surface of the side wall 102. A sealing ring is provided between the inner and outer rings of the second bearing 402.

[0031] The cover plate 4 is located above the fixing ring 203. The cover plate 4 and the fixing ring 203 are connected and fixed by an axially extending connecting rod 403. The connecting rod 403 is evenly distributed along the circumference, and its upper and lower ends are welded and fixed to the cover plate 4 and the fixing ring 203, respectively. The connecting rod 403 connects the cover plate 4 and the impeller 2 into a whole. Driven by the motor 3, the cover plate 4 and the impeller 2 rotate synchronously.

[0032] like Figure 4 , Figure 5 As shown, the cover plate 4 is hollow inside, forming an accommodating space. A sliding sealing structure 5 is provided within this space. The sliding sealing structure 5 includes four fan-shaped partitions 501 evenly spaced around the edge of the air inlet / outlet 401. The central angle of each partition 501 is 90°, and the center of each partition 501 coincides with the edge of the air inlet 401. The curved surface of each partition 501 fits against the sidewall of the accommodating space. In this embodiment, the cover plate 4 and the partitions 501 are fixed together by welding or screws.

[0033] A sliding channel 502 is formed between adjacent partitions 501. A sealing element 503 is slidably connected within the sliding channel 502. The sealing element 503 includes a fan-shaped sealing plate 504 and an extension plate 505 located on one side of the arc surface of the fan-shaped sealing plate 504. The sealing plate 504 and the extension plate 505 are integrally formed. It is worth further explaining that the central angle of the fan-shaped sealing plate 504 is 90°, the center of the fan-shaped sealing plate 504 coincides with the center of the air inlet 401, and the arc surface of the fan-shaped sealing plate 504 coincides with the edge of the air inlet 401. When adjacent fan-shaped sealing plates 504 are in complete contact, the four fan-shaped sealing plates 504 form a circular plate with the same diameter as the air inlet 401, thereby sealing the air inlet 401.

[0034] The side of the extension plate 505 facing the fan-shaped sealing plate 504 is curved and in complete contact with the curved surface of the fan-shaped sealing plate 504. The side of the extension plate 505 away from the fan-shaped sealing plate 504 is flat. The width of the extension plate 505 is the same as the width of the sliding channel 502. The extension plate 505 is in smooth contact with the two side partitions 501. The extension plate 505 is always within the sliding channel 502.

[0035] An elastic element 506 is provided between the extension plate 505 and the side wall of the receiving space, providing elastic support for the extension plate 505. A total of three elastic elements are provided on a single extension plate 505 along its width. Specifically, the elastic element 506 is a spring, extending along the depth direction of the sliding channel 502. One end of the spring is welded and fixed to the surface of the extension plate 505, and the other end is welded and fixed to the side wall of the receiving space. It is worth further explaining that when the spring is in its natural state, the four fan-shaped sealing plates 504 surround and form a circular plate, completely sealing the air inlet 401.

[0036] In use, the blower is started, and the impeller 2 and cover plate 4 rotate synchronously under the drive of motor 3. Under the action of centrifugal force, the sealing member 503 slides away from the air inlet 401 and enters the sliding channel 502, where the elastic element 506 is compressed. At this time, the air inlet 401 is open, and air enters the blower through it. The rotating impeller 2 efficiently converts mechanical energy into gas pressure energy and kinetic energy, thereby forming a high-speed airflow, which is then discharged from the air outlet duct 103. When the blower needs to be turned off, the impeller 2 and cover plate 4 lose power, the centrifugal force disappears, and the sealing member 503 re-enters the air inlet 401 under the rebound action of the elastic element 506. The four fan-shaped sealing plates 504 close together to form a circular plate, sealing the air inlet 401.

[0037] By setting a cover plate 4 that rotates synchronously with the impeller 2 and a sliding sealing structure 5 inside the cover plate 4, the air inlet 401 can be opened or closed according to the working or non-working state of the blower. Especially when the blower is not working, closing the air inlet 401 can prevent dust, moisture and other impurities in the air from entering the blower through the air inlet 401, avoid serious dust accumulation inside the blower and the proliferation of bacteria, and protect the life and health of the people in the vehicle during subsequent use; it can also prevent moisture and other impurities from causing rust or even corrosion to the internal structure of the blower, ensuring the normal operation of the blower and extending its service life.

[0038] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A vehicle air conditioning blower characterized by comprising: The device includes a housing and an impeller located inside the housing. The impeller is rotatably connected to the housing. A cover plate is provided at the top opening of the housing. The cover plate rotates synchronously with the impeller. A circular air inlet is opened at the center of the cover plate. The inside of the cover plate is hollow and forms a receiving space. A sliding sealing structure is provided in the receiving space to open or close the air inlet. The sliding sealing structure includes four fan-shaped partitions spaced around the edge of the air inlet and outlet. The central angle of the partitions is 90°. A sliding channel is formed between adjacent partitions. A sealing element is slidably connected in the sliding channel. The sealing element includes a fan-shaped sealing plate and an extension plate located on one side of the arc surface of the fan-shaped sealing plate. The central angle of the fan-shaped sealing plate is 90°. The four fan-shaped sealing plates form a circular plate with the same diameter as the air inlet, thereby sealing the air inlet. An elastic element is provided between the extension plate and the side wall of the receiving space to provide elastic support for the extension plate.

2. The air conditioning blower for vehicle according to claim 1, characterized by The center of the partition coincides with the edge of the air inlet, and the curved surface of the partition fits against the side wall of the accommodating space.

3. The air conditioning blower for vehicle according to claim 1, characterized by The center of the fan-shaped sealing plate coincides with the center of the air inlet, and the arc surface of the fan-shaped sealing plate coincides with the edge of the air inlet.

4. The air conditioning blower for vehicle according to claim 1, characterized by The width of the extension plate is the same as the width of the sliding channel. The extension plate is in smooth contact with the side partitions and is always within the sliding channel.

5. The air conditioning blower for vehicle according to claim 4, characterized by The elastic element is a spring, which extends along the depth of the sliding channel. One end of the spring is fixed to the extension plate, and the other end of the spring is fixed to the side wall of the receiving space. When the spring is in its natural state, the fan-shaped sealing plate surrounds and forms a circular plate, completely sealing the air inlet.

6. The air conditioning blower for vehicle according to claim 1, characterized by An air vent is provided at the waist of the side wall, and an air duct is connected to the air vent.

7. The air conditioning blower for vehicle according to claim 1, characterized by The impeller includes a mounting plate at the bottom and a retaining ring at the top. A blade extending axially is provided between the mounting plate and the retaining ring. A cover plate is located above the retaining ring, and the cover plate and the retaining ring are connected and fixed by an axially extending connecting rod.

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