Fresh air system fan with compact structure

Abstract

The utility model provides a fresh air system fan with a compact structure. The fresh air system fan comprises a motor, an impeller, a shell and an installation assembly. The mounting assembly comprises a mounting piece, the mounting piece is provided with an inner ring and an outer ring which have a height difference, the inner ring of the mounting piece is provided with a plurality of first mounting holes, the outer ring of the mounting piece is provided with a plurality of second mounting holes, the first mounting holes are used for being connected with the motor base, and the second mounting holes are used for being connected with the shell. The motor is not attached to the motor base after being installed in place, the height of the impeller can be reduced as far as possible relative to the position of the motor, and the motor can be close to the thickness center of the shell, namely the thickness center of the impeller as far as possible, so that the impeller can be driven to rotate more stably; vibration noise can be reduced to a certain extent, vibration transmitted by the motor can be counteracted by the mounting pieces to a certain extent, and noise generated when the fan runs is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a compact fresh air system fan. Background Technology

[0002] A fresh air system is an effective air purification system that circulates indoor air. It expels stale indoor air to the outside while introducing fresh outdoor air (which may undergo sterilization, disinfection, and filtration) to keep the room clean and fresh. The fresh air system uses fans to autonomously supply and exhaust air, maximizing indoor air circulation and replacement. Therefore, the fan is a key component of a fresh air system.

[0003] A typical fan consists of a motor, impeller, and casing. The motor is mounted inside the casing, and its rotating shaft is connected to the impeller, driving its rotation. The motor is directly screwed to the casing, requiring it to be flush against the casing. This method of mounting the motor directly to the casing can compromise the impeller's fit and overall structural compactness. Furthermore, the screw-mounted design can cause vibrations during motor rotation, resulting in noise during operation of the fresh air system, which requires further improvement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a fan with a more compact overall structure and less vibration.

[0005] To achieve the above objectives, this utility model provides a compact fresh air system fan, including a motor, impeller, housing, and mounting components;

[0006] The housing has an internal air duct, and the motor and the impeller are both located at the center of the air duct. The motor includes a motor base, a stator, a rotor, and a rotating shaft. The stator is fixedly connected to the motor base, the rotor is connected to the rotating shaft, and the impeller is connected to the rotating shaft.

[0007] The mounting assembly includes a mounting plate, which has an inner ring and an outer ring with a height difference. The inner ring of the mounting plate has a plurality of first mounting holes, and the outer ring has a plurality of second mounting holes. The first mounting holes are used to connect with the motor base, and the second mounting holes are used to connect with the housing.

[0008] Furthermore, the mounting assembly also includes rivets, anchor nuts, and screws, the screws being used to connect the first mounting hole to the motor base, and the rivets and anchor nuts being used to connect the second mounting hole to the housing.

[0009] Furthermore, the mounting plate is made of metal.

[0010] Furthermore, the mounting plate is an iron sheet or an aluminum alloy sheet.

[0011] Furthermore, the gap between the inner ring of the mounting plate and the outer shell is filled with a vibration damping pad, which is made of an elastic material.

[0012] Furthermore, the vibration damping pad is arranged in a ring shape.

[0013] Furthermore, three of each of the first and second mounting holes are provided, and the phase angle of each hole relative to the rotation center is 120 degrees. The motor base is provided with motor base mounting holes that correspond one-to-one with the first mounting holes, and the outer shell is provided with outer shell mounting holes that correspond one-to-one with the second mounting holes.

[0014] Furthermore, the motor mount hole is a threaded hole, and the housing mount hole is a through hole.

[0015] The above-mentioned solution of this utility model has the following beneficial effects:

[0016] The compact fresh air system fan provided by this utility model, through the mounting plate of the mounting component, allows the motor to be installed without touching the motor base. For the impeller, it can be lowered as much as possible relative to the motor position, and the motor can also be placed as close as possible to the thickness center of the outer shell, that is, the thickness center of the impeller. Therefore, the rotation of the impeller can be more stable, which can reduce vibration and noise to a certain extent. Since the mounting plate has a certain degree of deformability, the vibration transmitted by the motor can be offset by the mounting plate to a certain extent, thereby reducing the vibration transmitted to the connection of the outer shell. Furthermore, it can be filled with vibration damping pads, which significantly reduces the noise of the fan during operation.

[0017] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the connection between the mounting components and the motor of this utility model;

[0020] Figure 3 This is a cross-sectional view of the connection between the mounting component and the motor of this utility model.

[0021] [Explanation of Labels in the Attached Image]

[0022] 1-Motor; 2-Impeller; 3-Housing; 4-Rotating shaft; 5-Motor slot; 6-Motor base; 7-Rotor; 8-Mounting plate; 9-Rivet; 10-Anchor nut; 11-Screw; 12-First mounting hole; 13-Second mounting hole; 14-Vibration damping pad. Detailed Implementation

[0023] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a locking 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.

[0026] like Figures 1-3 As shown, an embodiment of this utility model provides a compact fresh air system fan, including a motor 1, an impeller 2, and a housing 3. The housing 3 adopts a volute design to improve airflow efficiency. An air duct is provided inside the housing 3, and both the motor 1 and the impeller 2 are located at the center of the air duct. The motor 1 is connected to the housing 3 via a mounting assembly, and the impeller 2 is connected to the rotating shaft 4 of the motor 1, so that the motor 1 drives the impeller 2 to rotate.

[0027] In this embodiment, the impeller 2 is designed as a single unit, meaning that the upper and lower edges of the blades of the impeller 2 are connected as a single structure by connecting rings. Simultaneously, the connecting ring at the lower edge of the blades extends towards the center and protrudes to form a motor slot 5. After the impeller 2 and motor 1 are installed in place, the main body of the motor 1 is located between the outer casing 3 and the motor slot 5. This design fully utilizes space and improves structural compactness.

[0028] Meanwhile, by configuring the mounting components, the structural compactness can be further improved compared to the method of directly connecting the motor 1 to the housing 3. The motor 1 includes a motor mount 6 with a circuit board, a stator, a rotor 7, and a rotating shaft 4. The stator is fixedly connected to the motor mount 6, serving as the fixed part of the motor 1. The rotor 7 is connected to the rotating shaft 4 and rotates synchronously. Therefore, when the stator is energized, the rotor 7 can rotate relative to the stator, driving the rotating shaft 4 and the impeller 2 to rotate.

[0029] The mounting assembly includes a mounting plate 8, rivets 9, anchor nuts 10, and screws 11. The mounting plate 8 is generally circular and features an inner and outer ring with a height difference; it can also be considered as the center of the mounting plate 8 protruding to one side. The inner ring of the mounting plate 8 has multiple first mounting holes 12, and the outer ring has multiple second mounting holes 13. The first mounting holes 12 are used to connect to the motor mount 6, and the second mounting holes 13 are used to connect to the housing 3. Correspondingly, the motor mount 6 has motor mount holes, and the housing 3 has housing mount holes. The motor mount holes are threaded holes, and the housing mount holes are through holes. Since the mounting plate 8 is relatively thin, the first mounting holes 12 and 13 are also through holes. When connecting to the motor 1, the inner ring of the mounting plate 8 fits against the motor mount 6, the first mounting holes 12 align with the motor mount holes, and the screws 11 are inserted and tightened. When connected to the outer casing 3, the outer ring of the mounting plate 8 fits against the outer casing 3, the second mounting hole 13 is aligned with the mounting hole of the outer casing, the rivet 9 is inserted and tightened with the anchor nut 10 on the other side.

[0030] Therefore, by using the mounting plate 8, the motor 1 is not flush with the motor base 6 after installation. This allows the impeller 2 to be positioned as low as possible relative to the motor 1, until it is about to contact the outer casing 3. This also allows the motor 1 to be as close as possible to the center of the outer casing 3's thickness, which is also the center of the impeller 2's thickness. Therefore, the motor 1 drives the impeller 2 to rotate more smoothly, reducing vibration and noise to some extent. Furthermore, the mounting plate 8, made of metal, has a certain degree of deformability. Therefore, the vibration transmitted by the motor 1 can be partially offset by the mounting plate 8, resulting in less vibration transmitted to the connection point of the outer casing 3, further reducing noise.

[0031] In a preferred embodiment, the mounting plate 8 is made of iron or stainless steel, which is easy to process and has a certain degree of deformability. Of course, other suitable metal materials can also be used. Furthermore, in this embodiment, the gap between the inner ring of the mounting plate 8 and the outer shell 3 can be further filled with a vibration damping pad 14. The vibration damping pad 14 can be made of rubber or similar materials to further reduce the vibration transmitted to the outer shell 3. The vibration damping pad 14 can also be arranged in a ring shape to facilitate the lowest point of the motor 1 extending downwards from the center of the mounting plate 8 and the vibration damping pad 14.

[0032] In a preferred embodiment, three mounting holes are provided for the first mounting hole 12, the second mounting hole 13, the motor mount mounting hole, and the housing mounting hole, and the phase angle of each hole relative to the rotation center is 120 degrees. Of course, in other embodiments, four 90-degree arrangements can also be used. Based on the specifications of motor 1, the inner ring size of the mounting base 8 is usually matched with the specifications of motor 1, while the outer ring size of the mounting base 8, i.e., the outer diameter of the entire mounting base 8, can be changed relatively flexibly to make the installation with the housing 3 more convenient and reliable.

[0033] Additionally, it should be noted that the mounting holes on the outer casing 3 can also be used to connect the outer casing 3 to the mounting plate of the fresh air system. During installation, the rivets 9 can be passed through the holes on the mounting plate to install the entire fan.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A compact fresh air system fan, characterized in that, Includes the motor, impeller, housing, and mounting components; The housing has an internal air duct, and the motor and the impeller are both located at the center of the air duct. The motor includes a motor base, a stator, a rotor, and a rotating shaft. The stator is fixedly connected to the motor base, the rotor is connected to the rotating shaft, and the impeller is connected to the rotating shaft. The mounting assembly includes a mounting plate, which has an inner ring and an outer ring with a height difference. The inner ring of the mounting plate has a plurality of first mounting holes, and the outer ring has a plurality of second mounting holes. The first mounting holes are used to connect with the motor base, and the second mounting holes are used to connect with the housing.

2. The compact fresh air system fan according to claim 1, characterized in that, The mounting assembly also includes rivets, anchor nuts, and screws. The screws are used to connect the first mounting hole to the motor base, and the rivets and anchor nuts are used to connect the second mounting hole to the housing.

3. The compact fresh air system fan according to claim 1, characterized in that, The mounting plate is made of metal.

4. The compact fresh air system fan according to claim 3, characterized in that, The mounting plate is made of iron or aluminum alloy.

5. A compact fresh air system fan according to claim 1, characterized in that, The gap between the inner ring of the mounting plate and the outer shell is also filled with a vibration damping pad, which is made of an elastic material.

6. The compact fresh air system fan according to claim 5, characterized in that, The vibration damping pad is arranged in a ring.

7. A compact fresh air system fan according to any one of claims 1-6, characterized in that, The first mounting hole and the second mounting hole are each provided in threes, and the phase angle of each relative to the rotation center is 120 degrees. The motor base is provided with motor base mounting holes that correspond one-to-one with the first mounting holes, and the outer shell is provided with outer shell mounting holes that correspond one-to-one with the second mounting holes.

8. A compact fresh air system fan according to claim 7, characterized in that, The motor mount hole is a threaded hole, and the housing mount hole is a through hole.

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