A connecting structure of a centrifugal fan and an air conditioner

Abstract

The utility model relates to air conditioning equipment technical field discloses a centrifugal fan and air conditioner's connecting structure, including air inlet shell and mounting panel, the outer wall front side of air inlet shell is provided with the upper volute, the adjacent side of air inlet shell with the upper volute is provided with quick -mounting mechanism, quick -mounting mechanism is used for connecting air inlet shell with the upper volute, the outer wall front side of upper volute is clamped with lower volute, the outer wall rear side fixedly connected with wind wheel of lower volute, the top left and right sides of lower volute are all fixedly connected with the positioning block, and the outer wall of two positioning blocks all is located and has set up the mouthpiece. In the utility model, through the lower volute top positioning block and mounting panel positioning rod clamping, avoid horizontal deviation and cause vibration, both sides install the ear and install the block through clamping and screw fastening, all -round restraint lower volute, compact integral structure, effectively buffer, absorb vibration energy, greatly reduce vibration transmission.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to a connection structure between a centrifugal fan and an air conditioner. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas. In shopping malls, office buildings, hotels, large commercial buildings, and residences, centrifugal fans are an important part of the air conditioning and ventilation system, responsible for delivering cold or warm air and regulating indoor temperature and air quality.

[0003] In air conditioning systems, centrifugal fans are crucial ventilation components. The stability and sealing of their connection with the air conditioner directly affect its performance. Traditionally, flanges are welded or riveted to the centrifugal fan outlet and the air conditioner inlet. These flanges are typically made of metal, usually round or square, with several bolt holes evenly distributed along their edges. A gasket is placed between the two flanges to enhance the seal. However, centrifugal fans often vibrate during operation, and this vibration is transmitted to other components of the fresh air system, increasing noise and affecting the user experience. Existing technology uses bolts to connect the fan to the air conditioning ducts, enhancing the overall stability of the connection. However, in practical use, since the fan is only connected to the air conditioning ducts without an external connection mechanism, the vibration generated during fan operation cannot be effectively controlled, reducing the practicality of the device. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a connection structure between a centrifugal fan and an air conditioner, aiming to improve the problem in the prior art where the fan is only connected to the air conditioner duct and there is no external connection mechanism, which cannot effectively control the vibration generated during the operation of the fan and reduces the practicality of the device.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a connection structure between a centrifugal fan and an air conditioner, comprising an air inlet housing and a mounting plate. An upper volute is provided on the front side of the outer wall of the air inlet housing. A quick-connect mechanism is provided on the side adjacent to the upper volute of the air inlet housing. The quick-connect mechanism connects the air inlet housing and the upper volute. A lower volute is engaged with the front side of the outer wall of the upper volute. A fan wheel is fixedly connected to the rear side of the outer wall of the lower volute. Positioning blocks are fixedly connected to the left and right sides of the top of the lower volute. Positioning openings are provided on the outer walls of both positioning blocks. Positioning rods are fixedly connected to the left and right sides of the rear end of the outer wall of the mounting plate. The two positioning rods are respectively engaged with the corresponding positioning ports. A mounting ear is fixedly connected to the right side of the outer wall of the lower volute. A mounting block is fixedly connected to the right rear end of the mounting plate. The mounting block engages with the mounting ear. A screw is threaded to the top of the mounting block, and the bottom end of the screw penetrates the mounting block. A mounting ear is fixedly connected to the bottom left side of the outer wall of the lower volute. A mounting block is fixedly connected to the left rear end of the mounting plate. The mounting block engages with the mounting ear. A screw is threaded to the outer wall of the mounting ear, and the bottom end of the screw is threaded to the mounting block.

[0006] The above technical solution involves the following steps: First, the mounting plate must be precisely and firmly fixed to the designated mounting surface according to engineering requirements. This operation, as the foundation of the entire installation process, provides a solid support framework for the subsequent installation of components and the stable operation of the overall structure, laying the initial foundation for the stability of the device's operation. Next, the air inlet casing is connected to the upper volute. This step plays a decisive role in building the internal framework of the overall structure. This connection effectively stabilizes the aerodynamic channels inside the fan, providing a key guarantee for the normal and efficient operation of the fan. Following this, the upper and lower volutes are combined using a carefully designed interlocking mechanism. This interlocking structure, with its unique construction, not only accurately positions the impeller, ensuring it is strictly in the optimal working position planned in the design, but also significantly suppresses the radial displacement generated by the impeller during operation. This reduces the vibration source from the root of the fan's internal structure, thereby greatly improving the stability and reliability of the fan's operation. The positioning block at the top of the lower volute and the positioning rod at the rear end of the mounting plate are precisely aligned and engaged through the positioning port. This design can precisely limit the relative position of the lower volute and the mounting plate in the horizontal direction, effectively avoiding left and right offsets in the horizontal direction, further enhancing the stability of the overall structure, and significantly reducing vibrations caused by positional deviations. At the same time, after the mounting ear one on the right side of the lower volute engages with the mounting block one on the mounting plate, it is secured by screw one through the mounting block one; similarly, after the mounting ear two on the left side engages with the mounting block two on the mounting plate, it is threadedly connected by screw two. This multi-point engagement and screw fastening method securely connects the lower volute to the mounting plate from multiple dimensions and all directions, making the entire device a tight and stable whole, and finally reliably fixing the entire centrifugal fan device to the mounting plate, effectively suppressing the vibration generated during the operation of the fan, and ensuring that the device can operate stably and efficiently for a long time.

[0007] As a further description of the above technical solution: The quick-installation mechanism includes multiple insert rods, which are fixedly connected to the front periphery of the outer wall of the air inlet housing. Slots are provided on the rear periphery of the outer wall of the upper volute housing, and the multiple insert rods engage with their corresponding slots. Locking blocks are fixedly connected to the outer periphery of the air inlet housing, and locking plates are fixedly connected to the outer periphery of the upper volute housing. Locking slots are provided on the outer walls of the locking plates, and the locking slots engage with their corresponding locking blocks.

[0008] The above technical solution involves the following steps: When installing the centrifugal fan, first, the mounting plate is firmly fixed to the designated surface according to the project requirements. This is the foundation for subsequent installation and stable operation. Next, the inlet casing and the upper volute are connected to build the internal frame and stabilize the aerodynamic channel of the fan. Then, the upper volute and the lower volute are engaged to accurately position the impeller, suppress its radial displacement, and reduce vibration. Afterward, the positioning block at the top of the lower volute and the positioning rod of the mounting plate are engaged through the positioning port to prevent horizontal displacement. At the same time, the mounting ears on both sides of the lower volute are engaged with the corresponding mounting blocks of the mounting plate and tightened with screws to ensure a stable connection from all directions, suppress fan vibration, and ensure long-term stable and efficient operation of the device.

[0009] As a further description of the above technical solution: A shock-absorbing pad is fixedly connected to the front side of the outer wall of the mounting plate, and positioning bolts are threaded around the outer wall of the mounting plate, with multiple positioning bolts penetrating the shock-absorbing pad.

[0010] Through the above technical solutions: the damping pad absorbs and disperses vibration energy through elastic deformation, reducing the impact on components such as air conditioners, reducing component loosening, wear and noise, and the positioning bolts can not only fix the mounting plate to ensure its stability, but also position the damping pad to prevent it from shifting due to external forces, thus ensuring the damping effect.

[0011] As a further description of the above technical solution: The top of the screw has a cross groove, and the outer wall of the screw is smoothed all around.

[0012] The above technical solution, with its cross-shaped groove, allows operators to easily tighten or loosen screws with a Phillips screwdriver. The smooth treatment around its outer wall reduces friction with the threaded hole of the mounting block, making the operation smooth.

[0013] As a further description of the above technical solution: A T-shaped block is fixedly connected to the middle of the bottom end of the upper volute, and a sliding groove is provided on the left side of the bottom of the upper volute.

[0014] The above technical solution provides two connection methods for the device through the T-block and the slide, which facilitates quick connection with external connectors.

[0015] As a further description of the above technical solution: A sealing strip is fixedly connected to the bottom front side of the outer wall of the air inlet housing, and a reserved groove is provided on the rear side of the outer wall of the upper volute housing, and the sealing strip engages with the reserved groove.

[0016] Through the above technical solution, the sealing strip is tightly embedded in the reserved groove, forming a good sealing structure.

[0017] As a further description of the above technical solution: A positioning plate is fixedly connected to the rear side of the outer wall of the air inlet shell, and a positioning hole is provided on the inner wall of the positioning plate.

[0018] The above technical solution allows for precise positioning of the air inlet housing within the system by using positioning holes to engage with corresponding positioning pins on other components. This ensures accurate connection with other components.

[0019] As a further description of the above technical solution: An information board is fixedly connected to the left side of the outer wall of the air inlet shell, and the surface of the information board is smoothed.

[0020] The above technical solution involves smoothing the surface of the information board, making it easy to clean, preventing dust, oil, and other contaminants from adhering, and ensuring that the text and signs on the information board are always clearly visible.

[0021] As a further description of the above technical solution: This utility model has the following beneficial effects: 1. In this utility model, the positioning block at the top of the lower volute engages with the positioning rod of the mounting plate to prevent horizontal displacement from causing vibration. The mounting ears on both sides are fastened to the mounting block by engaging and screws, which constrains the lower volute in all directions, tightens the overall structure, effectively buffers and absorbs vibration energy, greatly reduces vibration transmission, and ultimately achieves excellent vibration reduction and noise reduction effect, improving the stability of equipment operation and user experience.

[0022] 2. In this utility model, the insertion rod and slot cooperate to initially stabilize the front and rear positions, reducing the loosening of the connection and the wear of the parts caused by the front and rear shaking. The locking block and slot further constrain the relative movement from the top and bottom and left and right, which enhances the stability in all directions, effectively resists the vibration of the fan operation and external interference, and ensures the stable operation of the fan. No complicated tools are required, and the connection can be completed by simple push and pull. The operation is extremely simple and greatly improves the installation efficiency. Attached Figure Description

[0023] Figure 1 This is a perspective view of a connection structure between a centrifugal fan and an air conditioner proposed in this utility model; Figure 2 This is an exploded view of the connection structure between a centrifugal fan and an air conditioner proposed in this utility model; Figure 3 This is a partial structural diagram of a connection structure between a centrifugal fan and an air conditioner proposed in this utility model; Figure 4 This is a schematic diagram of the mounting plate for the connection structure between a centrifugal fan and an air conditioner proposed in this utility model; Figure 5 This is a schematic diagram of a quick-assembly mechanism for a connection structure between a centrifugal fan and an air conditioner proposed in this utility model; Figure 6 This is a schematic diagram of the air inlet casing of a centrifugal fan and air conditioner connection structure proposed in this utility model; Figure 7 This is a schematic diagram of the upper volute of a centrifugal fan and air conditioner connection structure proposed in this utility model.

[0024] Legend: 1. Air inlet housing; 2. Quick-installation mechanism; 201. Insert rod; 202. Slot; 203. Locking block; 204. Locking plate; 205. Locking groove; 3. Upper volute; 4. Impeller; 5. Lower volute; 6. Mounting plate; 7. Positioning block; 8. Positioning port; 9. Positioning rod; 10. Vibration damping pad; 11. Mounting ear one; 12. Mounting block one; 13. Screw one; 14. Mounting ear two; 15. Mounting block two; 16. Screw two; 17. Cross groove; 18. T-block; 19. Slide groove; 20. Sealing strip; 21. Reserved groove; 22. Positioning plate; 23. Positioning hole; 24. Information plate; 25. Positioning bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a connection structure between a centrifugal fan and an air conditioner, including an air inlet shell 1 and a mounting plate 6. An upper volute 3 is provided on the front side of the outer wall of the air inlet shell 1 to provide a basis for the initial guidance of airflow. A quick-connect mechanism 2 is provided on the side adjacent to the upper volute 3 of the air inlet shell 1. The quick-connect mechanism 2 is used to connect the air inlet shell 1 and the upper volute 3. A lower volute 5 is engaged on the front side of the outer wall of the upper volute 3 to help form a complete volute structure. A fan wheel 4 is fixedly connected to the rear side of the outer wall of the lower volute 5. Positioning blocks 7 are fixedly connected to the top left and right sides of the lower volute 5 to provide a basis for subsequent positioning connection with the mounting plate 6. Positioning holes 8 are opened on the outer walls of the two positioning blocks 7 to cooperate with positioning rods 9 on the mounting plate 6. Positioning rods 9 are fixedly connected to the left and right sides of the rear end of the outer wall of the mounting plate 6 to engage with the positioning holes 8 on the positioning blocks 7. The two positioning rods 9 are respectively engaged with the corresponding positioning holes 8. An external rotor motor is installed on the inner wall of the middle part of one side of the wind turbine 4. In this embodiment, the external rotor motor includes a rotor magnetic ring and a stator. The rotor magnetic ring is fixedly connected in a ring shape to the inner wall of one side of the wind turbine, while the stator is movably connected to the inner wall of the rotor magnetic ring through a magnetic levitation air gap connection, and the air gap between the two is 0.2-2mm. In this embodiment, the internal iron core of the stator can be selected as a twelve-slot ten-pole or twelve-slot fourteen-pole structure.

[0027] Additionally, a mounting ear 11 is fixedly connected to the right side of the outer wall of the lower volute 5, providing a structural basis for the connection between the lower volute 5 and the right side of the mounting plate 6. A mounting block 12 is fixedly connected to the right rear end of the mounting plate 6, engaging with the mounting ear 11 to achieve a stable connection between the right side of the lower volute 5 and the mounting plate 6. A screw 13 is threaded onto the top of the mounting block 12 for further tightening the connection between the mounting block 12 and the mounting ear 11. The bottom end of the screw 13 penetrates the mounting block 12, effectively fixing the mounting block 12 and the mounting ear 11. A mounting ear 24 is fixedly connected to the bottom left side of the outer wall of the lower volute 5, providing a structural basis for the connection between the lower volute 5 and the mounting plate 6. A mounting block 25 is fixedly connected to the left rear end of the mounting plate 6, engaging with the mounting ear 24. After engagement, it provides initial positioning for the left side connection. Screw 16 is threaded on the outer wall to further secure the connection between mounting block 15 and mounting ear 14. The bottom end of screw 16 is threaded to mounting block 15 to achieve a firm connection between the left side of the lower volute 5 and the mounting plate 6. A damping pad 10 is fixedly connected to the front side of the outer wall of the mounting plate 6 to effectively absorb the vibration generated during the operation of the fan. Locating bolts 25 are threaded around the outer wall of the mounting plate 6 to fix the mounting plate 6 to the mounting surface. Multiple locating bolts 25 pass through the damping pad 10 to ensure the stability of the position of the damping pad 10 while fixing the mounting plate 6, so that it can continue to play a damping role. A cross groove 17 is opened on the top of screw 13 for easy installation and disassembly. The outer wall of screw 13 is smoothed around the perimeter to reduce the friction between screw 13 and the threaded hole of mounting block 12, making the tightening process smoother. Specifically, firstly, the mounting plate 6 is fixed to the mounting surface. Then, the air inlet housing 1 is connected to the upper volute 3 to build a stable foundation for the overall structure and initially ensure operational stability. The upper volute 3 and the lower volute 5 are engaged, firmly placing the impeller 4 behind the lower volute 5. This engagement structure not only determines the position of the impeller 4 but also restricts its radial displacement, reducing operational sway. The positioning block 7 at the top of the lower volute 5 and the positioning rod 9 of the mounting plate 6 are engaged through the positioning port 8. This design precisely defines the positions of the two in the horizontal direction, preventing lateral displacement and further enhancing stability, reducing vibration caused by misalignment. The mounting ear 11 on the right side of the lower volute 5 is engaged with the mounting block 12 on the mounting plate 6 and is fastened by screw 13 through the mounting block 12. The mounting ear 14 on the left side is engaged with the mounting block 15 and is fastened by screw 13. The 6-threaded connection, with its multi-point engagement and screw fastening, secures the lower volute 5 to the mounting plate 6 from all angles, forming a tight whole. This fixes the entire device to the mounting plate 6, preventing vibration during fan operation. When the centrifugal fan's vibration is transmitted to the mounting plate 6, the damping pad 10 absorbs and disperses the vibration energy through elastic deformation, reducing the impact on components such as air conditioners, and minimizing component loosening, wear, and noise generation. The positioning bolt 25 not only fixes the mounting plate 6 to the surrounding structure, ensuring its stable position, but also positions the damping pad 10, preventing it from shifting due to external forces and ensuring the damping effect. The cross groove 17 on the top of the screw 13 allows operators to easily tighten or loosen it with a Phillips screwdriver. The smooth finish reduces friction between the screw and the threaded hole of the mounting block 12, ensuring smooth operation.

[0028] Reference Figure 1 , Figure 5 and Figure 7 The quick-installation mechanism 2 includes multiple insertion rods 201, which serve as connecting and positioning points. These rods 201 are fixedly connected to the front perimeter of the outer wall of the air inlet housing 1, providing multiple positioning support points for connection with the upper volute 3. Slots 202 are provided on the rear perimeter of the outer wall of the upper volute 3 to receive the insertion of the insertion rods 201. Each insertion rod 201 engages with its corresponding slot 202. Locking blocks 203 are fixedly connected to the outer perimeter of the air inlet housing 1, providing a structural foundation for a stable connection between the air inlet housing 1 and the upper volute 3 in other directions. All four sides of the outer wall are fixedly connected with a card plate 204. The card plate 204 is used to cooperate with the card block 203 on the air inlet shell 1. The outer wall of multiple card plates 204 is provided with a card groove 205. The card groove 205 is adapted to the card block 203. Multiple card grooves 205 are respectively engaged with the corresponding card block 203, which enhances the stability of the connection between the two in all directions. Through the dual cooperation structure of the above-mentioned plug rod 201 and slot 202, and card block 203 and card groove 205, the air inlet shell 1 and the upper volute shell 3 are quickly and stably connected, improving the installation efficiency and ensuring the reliability of the connection. Specifically, multiple insert rods 201 are fixed around the front side of the outer wall of the air inlet housing 1, corresponding to the slots 202 opened around the rear side of the upper volute housing 3. During installation, the air inlet housing 1 is pushed up to the upper volute housing 3, and the insert rods 201 are inserted into the slots 202 to initially position and limit the relative displacement of the air inlet housing 1 and the upper volute housing 3 in the front-back direction. At the same time, the locking blocks 203 around the outer wall of the air inlet housing 1 engage with the locking slots 205 on the locking plates 204 around the outer wall of the upper volute housing 3, further restricting the relative movement of the two in the up-down and left-right directions. This double-cooperation structure makes the air inlet housing 1 and the upper volute housing 3 tightly connected, ensuring the stability of the connection. Moreover, the operation is simple, requiring no complicated tools or steps, and can be completed quickly, improving work efficiency.

[0029] Reference Figure 1 , Figure 2 and Figure 6 A T-shaped block 18 is fixedly connected to the middle of the bottom end of the upper volute 3. A sliding groove 19 is provided on the left side of the bottom of the upper volute 3. A sealing strip 20 is fixedly connected to the bottom of the front side of the outer wall of the air inlet shell 1. A reserved groove 21 is provided on the rear side of the outer wall of the upper volute 3. The reserved groove 21 provides an installation position for the sealing strip 20, ensuring that the sealing strip 20 can be accurately embedded. The sealing strip 20 and the reserved groove 21 are engaged. Through the guiding and positioning cooperation of the T-shaped block 18 and the sliding groove 19, and the sealing cooperation of the sealing strip 20 and the reserved groove 21, the accuracy of the connection between the upper volute 3 and the air inlet shell 1 is improved, the sealing performance of the connection is enhanced, and the overall performance of the centrifugal fan is improved. Specifically, the T-block 18 and the slide groove 19 provide two connection methods for the device, facilitating quick connection with external connectors. The reserved groove 21 on the rear side of the outer wall of the upper volute 3 engages with the sealing strip 20. After the two are connected, the sealing strip 20 is tightly embedded in the reserved groove 21, forming a good sealing structure. This not only effectively prevents gas leakage at the connection between the air inlet shell 1 and the upper volute 3, ensuring the normal flow and pressure stability of the airflow inside the centrifugal fan, but also the tight engagement of the sealing strip 20 in the reserved groove 21 further enhances the stability of the connection between the two components and reduces loosening of the connection due to factors such as vibration.

[0030] Reference Figure 1 , Figure 4 and Figure 7 A positioning plate 22 is fixedly connected to the rear side of the outer wall of the air inlet shell 1, which provides a positioning reference structure for the air inlet shell 1 in the overall installation layout. The inner wall of the positioning plate 22 is provided with positioning holes 23. An information plate 24 is fixedly connected to the left side of the outer wall of the air inlet shell 1. The information plate 24 is used to record and display important information related to the air inlet shell 1 or the entire centrifugal fan, so that operators and maintenance personnel can quickly obtain the model of the equipment. The surface of the information plate 24 is smooth. Specifically, when it is necessary to connect the air inlet housing 1 to other related components, the positioning holes 23 are used to cooperate with the corresponding positioning pins on other components. Through this precise positioning cooperation, the position of the air inlet housing 1 in the whole system can be quickly and accurately determined, ensuring the connection accuracy with other components. The information plate 24 is used to record relevant information of the equipment. The surface of the information plate 24 is smooth, easy to clean, and prevents dust, oil and other contaminants from adhering, ensuring that the writing and markings on the information plate 24 are always clearly visible.

[0031] Working Principle: Before using the device, the mounting plate 6 is first fixed to the mounting surface, providing a stable foundation support for the entire centrifugal fan unit. Next, the inlet casing 1 is connected to the upper volute 3, establishing the internal framework of the overall structure and initially stabilizing the airflow channel inside the fan, providing a basic guarantee for the normal operation of the fan. The upper volute 3 and lower volute 5 engage. This engagement structure precisely determines the position of the impeller 4, ensuring that the impeller 4 operates in the optimal design position; it also greatly reduces the vibration caused by radial sway during the operation of the impeller 4, thus reducing vibration from the internal structural layer of the fan. To reduce vibration sources, the positioning block 7 at the top of the lower volute 5 and the positioning rod 9 of the mounting plate 6 engage through the positioning port 8, precisely defining the relative position of the lower volute 5 and the mounting plate 6 in the horizontal direction, avoiding lateral offset, further enhancing structural stability, and reducing vibration caused by misalignment. The mounting ears on both sides of the lower volute 5 are connected to the corresponding mounting blocks on the mounting plate 6 by engaging and fastening with screws. This multi-point fixing method constrains the lower volute 5 from multiple directions, stabilizing the lower volute 5 on the mounting plate 6 in all directions, making the entire device a tight whole. Furthermore, multiple insertion rods 201 are evenly distributed and fixed around the front side of the outer wall of the air inlet housing 1, precisely corresponding to the slots 202 opened around the rear side of the upper volute 3. During installation, the air inlet housing 1 is pushed up to the upper volute 3, and the insertion rods 201 are inserted into the slots 202 like guide pins. This not only provides a clear direction for docking but also initially limits the relative positions of the two in the front-back direction, reducing loosening of the connection and wear of components caused by front-back shaking. On this basis, the locking blocks 203 around the outer wall of the air inlet housing 1 and the slots 205 on the locking plates 204 around the outer wall of the upper volute 3 fit together. The locking blocks 203 are embedded in the slots 205, further constraining the relative movement of the two in the up-down and left-right directions, comprehensively enhancing the connection stability and resisting the influence of fan operation vibration and external shaking. This dual-fit structure not only tightly and securely connects the air inlet housing 1 and the upper volute 3 but is also easy to operate. No complicated tools are required; installation can be completed quickly by simply pushing and closing, greatly improving installation efficiency and saving time and labor costs.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection structure between a centrifugal fan and an air conditioner, comprising an air inlet casing (1) and a mounting plate (6), characterized in that: An upper volute (3) is provided on the front side of the outer wall of the air inlet housing (1). A quick-connect mechanism (2) is provided on the side adjacent to the upper volute (3). The quick-connect mechanism (2) is used to connect the air inlet housing (1) and the upper volute (3). A lower volute (5) is engaged on the front side of the outer wall of the upper volute (3). A fan wheel (4) is fixedly connected to the rear side of the outer wall of the lower volute (5). Positioning blocks (7) are fixedly connected to the top left and right sides of the lower volute (5). Positioning holes (8) are opened on the outer walls of the two positioning blocks (7). Positioning rods (9) are fixedly connected to the left and right sides of the rear end of the outer wall of the mounting plate (6). The two positioning rods (9) are engaged with the corresponding positioning holes (8). The outer wall of the lower volute (5) A mounting ear 1 (11) is fixedly connected to the right side. A mounting block 1 (12) is fixedly connected to the right rear end of the mounting plate (6). The mounting block 1 (12) engages with the mounting ear 1 (11). A screw 1 (13) is threadedly connected to the top of the mounting block 1 (12). The bottom end of the screw 1 (13) passes through the mounting block 1 (12). A mounting ear 2 (14) is fixedly connected to the bottom left side of the outer wall of the lower volute (5). A mounting block 2 (15) is fixedly connected to the left rear end of the mounting plate (6). The mounting block 2 (15) engages with the mounting ear 2 (14). A screw 2 (16) is threadedly connected to the outer wall of the mounting ear 2 (14). The bottom end of the screw 2 (16) is threadedly connected to the mounting block 2 (15).

2. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: The quick-installation mechanism (2) includes multiple insert rods (201), which are fixedly connected to the front periphery of the outer wall of the air inlet shell (1). The rear periphery of the outer wall of the upper volute (3) is provided with slots (202), and the multiple insert rods (201) are engaged with the corresponding slots (202). The outer periphery of the outer wall of the air inlet shell (1) is fixedly connected with blocks (203), and the outer periphery of the outer wall of the upper volute (3) is fixedly connected with plates (204). The outer walls of the multiple plates (204) are provided with slots (205), and the multiple slots (205) are engaged with the corresponding blocks (203).

3. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: A shock-absorbing pad (10) is fixedly connected to the front side of the outer wall of the mounting plate (6). Positioning bolts (25) are threaded around the outer wall of the mounting plate (6), and multiple positioning bolts (25) penetrate the shock-absorbing pad (10).

4. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: The top of the screw (13) is provided with a cross groove (17), and the outer wall of the screw (13) is smoothed around all sides.

5. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: A T-shaped block (18) is fixedly connected to the middle of the bottom end of the upper volute (3), and a sliding groove (19) is provided on the left side of the bottom of the upper volute (3).

6. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: A sealing strip (20) is fixedly connected to the bottom front side of the outer wall of the air inlet shell (1), and a reserved groove (21) is provided on the rear side of the outer wall of the upper volute (3). The sealing strip (20) engages with the reserved groove (21).

7. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: A positioning plate (22) is fixedly connected to the rear side of the outer wall of the air inlet shell (1), and a positioning hole (23) is provided on the inner wall of the positioning plate (22).

8. The connection structure between a centrifugal fan and an air conditioner according to claim 1, characterized in that: An information board (24) is fixedly connected to the left side of the outer wall of the air inlet shell (1), and the surface of the information board (24) is smoothed.

Images