Centrifugal fan and air conditioner

Abstract

The utility model discloses a centrifugal fan and air conditioner relates to air conditioning technical field. The utility model discloses a volute, rotating electrical machine and centrifugal fan blade, the volute includes the accommodation cavity, and the rotating electrical machine is embedded in the accommodation cavity. And the rotating electrical machine includes stator subassembly and rotor subassembly, the stator subassembly with the volute fixed connection, the rotor subassembly is located the outside of stator subassembly, and with stator subassembly rotation is connected. The centrifugal fan blade is sleeved in the outside of rotor subassembly, and with rotor subassembly fixed connection, when the rotor subassembly rotates, drives the centrifugal fan blade rotation. Therefore, when the combination use of multiple outer rotor form centrifugal fan, need not adopt the coupling to carry out the connection of rotating shaft, thereby can reduce the energy loss of rotating electrical machine and reduce the cumulative assembly error between centrifugal fan.

Description

Technical Field

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

[0002] Currently, centrifugal fans in air conditioners primarily function to transport air and regulate airflow distribution. For example, when an air conditioner is operating in cooling or heating mode, it can deliver cool or warm air through ducts to various areas to regulate indoor temperature. In some air conditioners with fresh air functions, centrifugal fans can also draw in fresh outdoor air and mix it with indoor return air to improve indoor air quality.

[0003] However, the centrifugal fans in current air conditioners usually use internal rotor motors, and multiple centrifugal fans are usually set up, which means that multiple centrifugal fans need to be connected by couplings along their axial direction. This results in an excessively long rotating shaft, and the internal rotor motor has to overcome the long cantilever to do work, which increases energy loss. Utility Model Content

[0004] This invention addresses the problem that the rotating shaft formed by the coupling in existing centrifugal fan assemblies is too long, increasing the energy loss of the internal rotor motor. It aims to provide a centrifugal fan and air conditioner that overcomes or at least partially solves the above problems.

[0005] According to a first aspect of this utility model, a centrifugal fan is provided, the centrifugal fan comprising: a volute, the volute including a receiving cavity; a rotary motor, the rotary motor being embedded in the receiving cavity, and the rotary motor including a stator assembly and a rotor assembly, the stator assembly being fixedly connected to the volute, the rotor assembly being located outside the stator assembly and rotatably connected to the stator assembly; and centrifugal fan blades, the centrifugal fan blades being sleeved on the outside of the rotor assembly and fixedly connected to the rotor assembly, the rotor assembly driving the centrifugal fan blades to rotate when rotating.

[0006] In one optional utility model, the rotary motor further includes at least one fixed bracket, the fixed bracket being arranged radially along the stator assembly, and the end of the fixed bracket away from the stator assembly being fixedly connected to the volute.

[0007] In one optional utility model, when at least two fixed supports are provided, the at least two fixed supports are distributed at equal angles about the central axis of the stator assembly.

[0008] In one optional utility model, the fixing bracket is threadedly connected to the volute; or, the fixing bracket is snapped into the volute.

[0009] In one optional utility model, the centrifugal fan blade includes a first fan blade section and a second fan blade section, the first fan blade section and the second fan blade section being located on opposite sides of the rotor assembly and respectively fixedly connected to the rotor assembly; wherein,

[0010] A connecting gap is formed between the first wind blade and the second wind blade, and the fixing bracket passes through the connecting gap radially along the first wind blade.

[0011] An optional utility model includes a rotor assembly comprising: a motor shaft, which is embedded in the center of the stator assembly and rotatably connected to the stator assembly; a transmission component, which is sleeved on the motor shaft and coaxially fixed to the motor shaft; and a rotor body, which is sleeved on the stator assembly and fixedly connected to the transmission component, wherein rotating the rotor body drives the motor shaft to rotate.

[0012] One optional utility model involves the rotor assembly and the centrifugal fan blades forming an integral structure.

[0013] An optional utility model includes a volute comprising a first housing and a second housing, the first housing and the second housing being disposed opposite to each other and their shapes being fitted together to form the accommodating cavity.

[0014] One optional utility model involves a detachable connection between the first housing and the second housing.

[0015] Based on a second aspect of this utility model, an air conditioner is also provided, the air conditioner including a centrifugal fan as described in any of the above utility model contents.

[0016] In one optional utility model, the air conditioner further includes a fan mounting plate, which is fixedly connected to the volute.

[0017] In one optional utility model, when at least two centrifugal fans are provided, the at least two centrifugal fans are spaced apart along the length direction of the fan mounting plate, and the at least two centrifugal fans are coaxially arranged.

[0018] Compared with existing technologies, this utility model includes a volute, a rotary motor, and centrifugal fan blades. The volute includes a receiving cavity, and the rotary motor is embedded in the receiving cavity. The rotary motor includes a stator assembly and a rotor assembly. The stator assembly is fixedly connected to the volute, and the rotor assembly is located outside the stator assembly and rotatably connected to it. The centrifugal fan blades are sleeved on the outside of the rotor assembly and fixedly connected to it. When the rotor assembly rotates, it drives the centrifugal fan blades to rotate. Therefore, when multiple external rotor centrifugal fans are used in combination, there is no need to use a coupling to connect the rotating shafts, thereby reducing the energy loss of the rotary motor and the cumulative assembly error between the centrifugal fans.

[0019] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0021] In the attached diagram:

[0022] Figure 1 This is a three-dimensional structural diagram of a centrifugal fan provided in an embodiment of the present utility model;

[0023] Figure 2 This is a left view of a centrifugal fan provided in an embodiment of this utility model;

[0024] Figure 3 This is a right view of a centrifugal fan provided in an embodiment of this utility model;

[0025] Figure 4 This is a partial three-dimensional structural diagram of a centrifugal fan provided in an embodiment of the present utility model;

[0026] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure at the central axis of the centrifugal fan.

[0027] Figure 6 This is a three-dimensional structural schematic diagram of a rotary motor provided in an embodiment of the present utility model;

[0028] Figure 7This is a partial three-dimensional structural diagram of an air conditioner provided in an embodiment of the present utility model;

[0029] Reference numerals: 1. Volute; 101. Accommodating cavity; 11. First housing; 12. Second housing; 2. Rotary motor; 21. Stator assembly; 22. Rotor assembly; 221. Motor shaft; 222. Transmission component; 223. Rotor body; 23. Fixed bracket; 3. Centrifugal fan blade; 301. Connecting gap; 31. First fan blade section; 32. Second fan blade section; 4. Fan mounting plate. Detailed Implementation

[0030] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0031] Currently, centrifugal fans in air conditioners primarily function to transport air and regulate airflow distribution. For example, when an air conditioner is operating in cooling or heating mode, it can deliver cool or warm air through ducts to various areas to regulate indoor temperature. In some air conditioners with fresh air functions, centrifugal fans can also draw in fresh outdoor air and mix it with indoor return air to improve indoor air quality.

[0032] However, the centrifugal fans in current air conditioners usually use internal rotor motors, and multiple centrifugal fans are usually set up, which means that multiple centrifugal fans need to be connected by couplings along their axial direction. This results in an excessively long rotating shaft, and the internal rotor motor has to overcome the long cantilever to do work, which increases energy loss.

[0033] Based on the aforementioned technical problems, this utility model embodiment is proposed. This utility model embodiment may include a volute 1, a rotary motor 2, and a centrifugal fan blade 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blade 3 is sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blade 3 to rotate. Therefore, when multiple external rotor centrifugal fans are used in combination, there is no need to use a coupling to connect the rotating shafts, thereby reducing the energy loss of the rotary motor 2 and reducing the cumulative assembly error between the centrifugal fans.

[0034] Reference Figure 1-6 This utility model provides a centrifugal fan, which may include a volute 1, a rotary motor 2, and centrifugal fan blades 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to the stator assembly 21. The centrifugal fan blades 3 are sleeved on the outside of the rotor assembly 22 and fixedly connected to the rotor assembly 22. When the rotor assembly 22 rotates, it drives the centrifugal fan blades 3 to rotate.

[0035] In this embodiment of the invention, the volute 1 may include a receiving cavity 101. The volute 1 can guide the airflow in a directional manner. For example, the volute 1 may also include an air inlet and an air outlet, and the receiving cavity 101 forms an air passage connection with the air inlet and the air outlet, respectively. The air inlet may be located axially on the centrifugal fan blade 3, and the air outlet may be located radially on the centrifugal fan blade 3. External airflow enters the receiving cavity 101 through the air inlet and, guided by the centrifugal fan blade 3, is directed to the air outlet, thereby realizing the ventilation, air exchange, and air supply functions of the centrifugal fan.

[0036] The rotary motor 2 is embedded in the accommodating cavity 101 and is used to provide air pressure to the centrifugal fan. The rotary motor 2 may include a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, which provides a fixed space for the stator assembly 21. The rotor assembly 22 is located outside the stator assembly 21 and is capable of rotating around the stator assembly 21. For example, the stator assembly 21 may include windings and an iron core, with the windings wound around the iron core to generate a magnetic field. Thus, the stator assembly 21 achieves power output through magnetic coupling with the rotor assembly 22 located outside it, thereby forming an external rotor motor.

[0037] The centrifugal fan blade 3 is a rotating component installed on the rotor assembly 22. Its rotation converts input rotational mechanical energy into kinetic energy of airflow, causing the airflow to be discharged radially along the centrifugal fan blade 3. The centrifugal fan blade 3 can be fitted onto the outside of the rotor assembly 22 and is fixedly connected to it. Therefore, when the rotor assembly 22 rotates, rotational kinetic energy can be synchronously transferred to the centrifugal fan blade 3, thereby driving the centrifugal fan blade 3 to rotate synchronously and discharge airflow.

[0038] When multiple centrifugal fans with external rotors are used in combination, couplings are not required to connect the rotating shafts. This reduces energy loss of the rotary motor 2 and decreases cumulative assembly errors between the centrifugal fans. Furthermore, the centrifugal fan, consisting of centrifugal blades 3, a volute 1, and a rotary motor 2, has a simple structure, is easy to maintain, has low production costs, and good product applicability.

[0039] In one optional embodiment of the utility model, referring to Figure 4 , Figure 5 as well as Figure 6 As shown, the rotary motor 2 also includes at least one fixed bracket 23, which is arranged radially along the stator assembly 21, and the end of the fixed bracket 23 away from the stator assembly 21 is fixedly connected to the volute 1.

[0040] In this embodiment of the invention, the fixing bracket 23 is arranged radially along the stator assembly 21, allowing the fixing bracket 23 and the centrifugal fan blade 3 to be arranged radially parallel. This ensures that the fixing bracket 23 does not affect the rotation and airflow of the centrifugal fan blade 3 while providing a fixed connection to the stator assembly 21. The end of the fixing bracket 23 away from the stator assembly 21 is fixedly connected to the volute 1. The concentricity between the stator assembly 21 and the centrifugal fan blade 3 is ensured through the assembly of the fixing bracket 23 and the volute 1.

[0041] In one example, the fixed bracket 23 can be a strip-shaped or columnar structure, which can reduce the production cost of the fixed bracket 23 and facilitate the assembly of the stator assembly 21 and the centrifugal fan blade 3. In one embodiment, the fixed bracket 23 can be an integral structure with the stator assembly 21. The integral structure design can further improve the concentricity between the stator assembly 21 and the centrifugal fan blade 3 and reduce assembly errors.

[0042] In another embodiment, the fixed bracket 23 and the stator assembly 21 can be fixed by means of welding, threaded connection and snap-fit.

[0043] In one optional embodiment of the utility model, referring to Figure 6 As shown, when at least two fixed supports 23 are provided, the at least two fixed supports 23 are distributed at equal angles about the central axis of the stator assembly 21.

[0044] In this embodiment of the invention, when N (N is a positive integer greater than or equal to 2) of the fixed supports 23 are provided, all N fixed supports 23 are distributed at equal angles about the central axis of the stator assembly 21. That is, the angle between any two adjacent fixed supports 23 and the central axis of the stator assembly 21 can remain the same, which is 360 degrees divided by N. Having at least two fixed supports 23 distributed at equal angles about the central axis of the stator assembly 21 can improve the structural stability of the stator assembly 21 and increase its structural support strength.

[0045] In one optional embodiment of the utility model, the fixing bracket 23 is threadedly connected to the volute 1. The volute 1 may be an injection-molded part. The fixing bracket 23 has an external thread on its end near the volute 1, and the volute 1 has an internal thread. The fixing bracket 23 and the volute 1 can be connected by threads. This connection method is applicable when the fixing bracket 23 and the stator assembly 21 are rotatably connected.

[0046] In another optional embodiment of the utility model, the fixed bracket 23 is snapped into the volute 1. The volute 1 may be an injection molded part. The snap-fit ​​method forms a connection between the fixed bracket 23 and the volute 1, which can facilitate the disassembly and assembly of the volute 1 and the fixed bracket 23, thereby improving the maintenance and cleaning convenience of the centrifugal fan.

[0047] In another optional embodiment of the utility model, if the volute 1 is made of metal, the fixing bracket 23 can also be fixed to the volute 1 by welding or other means. Those skilled in the art can select the connection method between the fixing bracket 23 and the volute 1 according to the actual materials, and no further limitations are imposed here.

[0048] In one optional embodiment of the utility model, referring to Figure 4 and Figure 5 As shown, the centrifugal fan 3 includes a first fan blade portion 31 and a second fan blade portion 32. The first fan blade portion 31 and the second fan blade portion 32 are located on both sides of the rotor assembly 22 and are respectively fixedly connected to the rotor assembly 22. A connecting gap 301 is formed between the first fan blade portion 31 and the second fan blade portion 32, and the fixing bracket 23 passes through the connecting gap 301 radially along the first fan blade portion 31.

[0049] In this embodiment of the invention, to facilitate the fixed connection between the fixed bracket 23 and the volute 1, the centrifugal fan blade 3 can be a split structure. For example, the centrifugal fan blade 3 can be divided into a first fan blade section 31 and a second fan blade section 32 along its axial direction. A connecting gap 301 is formed between the first fan blade section 31 and the second fan blade section 32. The fixed bracket 23 passes through the connecting gap 301 along the radial direction of the first fan blade section 31 (or along the radial direction of the rotor assembly 22) and is fixedly connected to the volute 1 and the stator assembly 21 respectively.

[0050] The first fan blade 31 and the second fan blade 32 are fixedly connected to the rotor assembly 22, so that when the rotor assembly 22 rotates, the first fan blade 31 and the second fan blade 32 can be driven to rotate synchronously.

[0051] In one optional embodiment of the utility model, referring to Figure 5 and Figure 6 As shown, the centrifugal fan may include a volute 1, a rotary motor 2, and centrifugal fan blades 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blades 3 are sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blades 3 to rotate. The rotor assembly 22 may include a motor shaft 221, a transmission component 222, and a rotor body 223. The motor shaft 221 is embedded in the center of the stator assembly 21 and rotatably connected to it. The transmission component 222 is sleeved on the motor shaft 221 and is coaxially fixed to it. The rotor body 223 is sleeved on the stator assembly 21 and fixedly connected to the transmission component 222. When the rotor body 223 rotates, it drives the motor shaft 221 to rotate.

[0052] In this embodiment of the invention, the volute 1 may include a receiving cavity 101. The volute 1 can guide the airflow in a directional manner. For example, the volute 1 may also include an air inlet and an air outlet, and the receiving cavity 101 forms an air passage connection with the air inlet and the air outlet, respectively. The air inlet may be located axially on the centrifugal fan blade 3, and the air outlet may be located radially on the centrifugal fan blade 3. External airflow enters the receiving cavity 101 through the air inlet and, guided by the centrifugal fan blade 3, is directed to the air outlet, thereby realizing the ventilation, air exchange, and air supply functions of the centrifugal fan.

[0053] The rotary motor 2 is embedded in the accommodating cavity 101, and is used to provide air pressure to the centrifugal fan. The rotary motor 2 may include a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the volute 1 provides a fixed space for the stator assembly 21. The rotor assembly 22 is located outside the stator assembly 21, and is capable of rotating around the stator assembly 21. Thus, the stator assembly 21 achieves power output through magnetic coupling with the rotor assembly 22 located outside it, thereby forming an external rotor motor.

[0054] The centrifugal fan blade 3 is a rotating component installed on the rotor assembly 22. Its rotation converts input rotational mechanical energy into kinetic energy of airflow, causing the airflow to be discharged radially along the centrifugal fan blade 3. The centrifugal fan blade 3 can be fitted onto the outside of the rotor assembly 22 and is fixedly connected to it. Therefore, when the rotor assembly 22 rotates, rotational kinetic energy can be synchronously transferred to the centrifugal fan blade 3, thereby driving the centrifugal fan blade 3 to rotate synchronously and discharge airflow.

[0055] The rotor assembly 22 may include a motor shaft 221, a transmission component 222, and a rotor body 223. The motor shaft 221 is embedded in the center of the stator assembly 21 and is rotatably connected to the stator assembly 21. For example, the coaxiality of the motor shaft 221 and the centrifugal fan blade 3 can be determined by the stator assembly 21. Bearings or other devices may also be provided between the stator assembly 21 and the motor shaft 221 to accommodate the rotation of the motor shaft 221; however, no further limitations are imposed here.

[0056] The transmission component 222 is sleeved on the motor shaft 221 and is coaxially fixed with the motor shaft 221. The rotor body 223 is sleeved on the stator assembly 21 and is fixedly connected to the transmission component 222. When the rotor body 223 rotates, it drives the motor shaft 221 to rotate. The rotor body 223 may be formed by stacking silicon steel sheets. Coaxial fixation means that the central axis of the transmission component 222 coincides with the central axis of the motor shaft 221, and the transmission component 222 is fixedly connected to the motor shaft 221. The transmission component 222 provides a rigid connection between the motor shaft 221 and the transmission component 222, thereby enabling the rotor body 223 to drive the motor shaft 221 to rotate synchronously when it rotates.

[0057] When multiple centrifugal fans with external rotors are used in combination, couplings are not required to connect the rotating shafts. This reduces energy loss of the rotary motor 2 and decreases cumulative assembly errors between the centrifugal fans. Furthermore, the centrifugal fan, consisting of centrifugal blades 3, a volute 1, and a rotary motor 2, has a simple structure, is easy to maintain, has low production costs, and good product applicability.

[0058] In one optional embodiment of the utility model, referring to Figure 5 As shown, the rotor assembly 22 and the centrifugal fan blade 3 are an integral structure.

[0059] In this embodiment of the invention, the rotor assembly 22 and the centrifugal fan blade 3 can be integrally connected using an injection molding process. For example, the rotor assembly 22 can be integrally formed along the radial direction of the centrifugal fan blade 3. The rotor body 223 of the rotor assembly 22 can be integrally formed with the centrifugal fan blade 3, and the transmission component 222 can also be integrally formed with the centrifugal fan blade 3. The integral design of the rotor assembly 22 and the centrifugal fan blade 3 can improve the connection stability between the rotor assembly 22 and the centrifugal fan blade 3.

[0060] In one optional embodiment of the utility model, referring to Figure 1 , Figure 2 as well as Figure 3 As shown, the centrifugal fan may include a volute 1, a rotary motor 2, and centrifugal fan blades 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blades 3 are sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blades 3 to rotate. The volute 1 includes a first housing 11 and a second housing 12, which are arranged opposite to each other and their shapes fit together to form the receiving cavity 101.

[0061] In this embodiment of the invention, the volute 1 may include a receiving cavity 101. The volute 1 can guide the airflow in a directional manner. For example, the volute 1 may also include an air inlet and an air outlet, and the receiving cavity 101 forms an air passage connection with the air inlet and the air outlet, respectively. The air inlet may be located axially on the centrifugal fan blade 3, and the air outlet may be located radially on the centrifugal fan blade 3. External airflow enters the receiving cavity 101 through the air inlet and, guided by the centrifugal fan blade 3, is directed to the air outlet, thereby realizing the ventilation, air exchange, and air supply functions of the centrifugal fan.

[0062] In one embodiment, the volute 1 may include a first housing 11 and a second housing 12, which are disposed opposite to each other, so that the volute 1 forms a split structure. The first housing 11 and the second housing 12 cooperate with each other to form the accommodating cavity 101. This facilitates the assembly and disassembly of the centrifugal fan 3 and the rotary motor 2.

[0063] The rotary motor 2 is embedded in the accommodating cavity 101, and is used to provide air pressure to the centrifugal fan. The rotary motor 2 may include a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the volute 1 provides a fixed space for the stator assembly 21. The rotor assembly 22 is located outside the stator assembly 21, and is capable of rotating around the stator assembly 21. Thus, the stator assembly 21 achieves power output through magnetic coupling with the rotor assembly 22 located outside it, thereby forming an external rotor motor.

[0064] The centrifugal fan blade 3 is a rotating component installed on the rotor assembly 22. Its rotation converts input rotational mechanical energy into kinetic energy of airflow, causing the airflow to be discharged radially along the centrifugal fan blade 3. The centrifugal fan blade 3 can be fitted onto the outside of the rotor assembly 22 and is fixedly connected to it. Therefore, when the rotor assembly 22 rotates, rotational kinetic energy can be synchronously transferred to the centrifugal fan blade 3, thereby driving the centrifugal fan blade 3 to rotate synchronously and discharge airflow.

[0065] When multiple centrifugal fans with external rotors are used in combination, couplings are not required to connect the rotating shafts. This reduces energy loss of the rotary motor 2 and decreases cumulative assembly errors between the centrifugal fans. Furthermore, the centrifugal fan, consisting of centrifugal blades 3, a volute 1, and a rotary motor 2, has a simple structure, is easy to maintain, has low production costs, and good product applicability.

[0066] In one optional embodiment of the utility model, referring to Figure 1 , Figure 2 as well as Figure 3 As shown, the first housing 11 and the second housing 12 are detachably connected.

[0067] In this embodiment of the present invention, the first housing 11 and the second housing 12 are detachably connected, thereby improving the ease of disassembly and cleaning of the volute housing 1.

[0068] In one embodiment, the first housing 11 and the second housing 12 form a first end and a second end that are in surface contact with each other. At the first end, the first housing 11 and the second housing 12 can be rotatably connected, so that the first housing 11 and the second housing 12 can rotate around the first end.

[0069] At the second end, the first housing 11 and the second housing 12 can be detachably connected. This allows the connection between the first housing 11 and the second housing 12 to be maintained during the assembly and disassembly of the volute 1.

[0070] In another embodiment, the first housing 11 and the second housing 12 may be detachably connected at both the first and second ends. The detachable connection may include snap-fit, threaded connection, or other methods.

[0071] In summary, this utility model discloses a centrifugal fan, which may include a volute 1, a rotary motor 2, and centrifugal fan blades 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blades 3 are sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blades 3 to rotate. Therefore, when multiple centrifugal fans with external rotors are used in combination, there is no need to use a coupling to connect the rotating shafts, thereby reducing the energy loss of the rotary motor 2 and reducing the cumulative assembly error between the centrifugal fans.

[0072] Reference Figure 7 As shown in the figure, this utility model embodiment also discloses an air conditioner, which may include a centrifugal fan as described in any of the above utility model embodiments.

[0073] In this embodiment of the present invention, the air conditioner may include, but is not limited to, ducted air conditioners and fresh air handling units. The centrifugal fan described in any of the above embodiments may include a volute 1, a rotary motor 2, and centrifugal fan blades 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blades 3 are sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blades 3 to rotate.

[0074] When multiple external rotor centrifugal fans are used in combination, couplings are not required to connect the rotating shafts. This reduces energy loss of the rotary motor 2 and minimizes cumulative assembly errors between the centrifugal fans. Furthermore, the centrifugal fan, consisting of centrifugal fan blades 3, a volute 1, and a rotary motor 2, has a simple structure, is easy to maintain, and has low production costs, making the air conditioner highly adaptable.

[0075] In an optional embodiment of the utility model, the air conditioner may further include a fan mounting plate 4, which is fixedly connected to the volute 1. The fan mounting plate 4 is used to provide assembly for components such as the volute 1, wherein the volute 1 can be fixedly connected to the fan mounting plate 4 by means of welding, snap-fitting, or threaded connection.

[0076] In one optional embodiment of the utility model, when at least two centrifugal fans are provided, the at least two centrifugal fans are distributed at intervals along the length direction of the fan mounting plate 4, and the at least two centrifugal fans are coaxially arranged.

[0077] In this embodiment of the invention, at least two centrifugal fans are coaxially arranged, meaning that the central axes of two adjacent centrifugal fans coincide, and the two adjacent centrifugal fans are fixedly connected. At least two centrifugal fans are spaced apart along the length of the fan mounting plate 4, thereby increasing the air volume and exhaust area of ​​the air conditioner. Those skilled in the art can determine the specific number of centrifugal fans based on the actual exhaust requirements of the air conditioner. For example, the air conditioner may include two centrifugal fans, three centrifugal fans, or four centrifugal fans; no further limitations are imposed here.

[0078] In air conditioners, the use of external rotor centrifugal fans eliminates the need for couplings to connect the rotating shafts. This reduces energy loss in the rotary motor 2 and minimizes cumulative assembly errors between the centrifugal fans. Furthermore, the centrifugal fan, composed of centrifugal blades 3, a volute 1, and a rotary motor 2, has a simple structure, is easy to maintain, has low production costs, and offers good product applicability.

[0079] In summary, this utility model discloses an air conditioner that may include a volute 1, a rotary motor 2, and a centrifugal fan blade 3. The volute 1 includes a receiving cavity 101, and the rotary motor 2 is embedded in the receiving cavity 101. The rotary motor 2 includes a stator assembly 21 and a rotor assembly 22. The stator assembly 21 is fixedly connected to the volute 1, and the rotor assembly 22 is located outside the stator assembly 21 and rotatably connected to it. The centrifugal fan blade 3 is sleeved on the outside of the rotor assembly 22 and fixedly connected to it. When the rotor assembly 22 rotates, it drives the centrifugal fan blade 3 to rotate. Therefore, when multiple external rotor centrifugal fans are used in combination, there is no need to use a coupling to connect the rotating shafts, thereby reducing the energy loss of the rotary motor 2 and the cumulative assembly error between the centrifugal fans.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] It will be readily apparent to those skilled in the art that any combination of the above embodiments is feasible. Therefore, any combination of the above embodiments is an implementation scheme of this utility model. However, due to space limitations, this specification will not describe them in detail here.

[0082] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0083] Similarly, it should be understood that, in order to simplify the present invention and aid in understanding one or more of the various aspects of the invention, in the description of exemplary embodiments of the present invention above, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof.

[0084] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

Claims

1. A centrifugal fan, characterized in that, The centrifugal fan includes: The volute includes a receiving cavity; A rotary motor is embedded in the accommodating cavity, and the rotary motor includes a stator assembly and a rotor assembly. The stator assembly is fixedly connected to the volute, and the rotor assembly is located outside the stator assembly and rotatably connected to the stator assembly. A centrifugal fan blade is sleeved on the outside of the rotor assembly and fixedly connected to the rotor assembly. When the rotor assembly rotates, it drives the centrifugal fan blade to rotate.

2. The centrifugal fan according to claim 1, characterized in that, The rotary motor further includes at least one fixed bracket, which is arranged radially along the stator assembly, and the end of the fixed bracket away from the stator assembly is fixedly connected to the volute.

3. The centrifugal fan according to claim 2, characterized in that, When at least two fixed supports are provided, the at least two fixed supports are distributed at equal angles about the central axis of the stator assembly.

4. The centrifugal fan according to claim 2, characterized in that, The fixed bracket is threadedly connected to the volute; or... The fixed bracket is engaged with the volute.

5. The centrifugal fan according to claim 2, characterized in that, The centrifugal fan blade includes a first blade section and a second blade section, which are located on opposite sides of the rotor assembly and are respectively fixedly connected to the rotor assembly; wherein, A connecting gap is formed between the first wind blade and the second wind blade, and the fixing bracket passes through the connecting gap radially along the first wind blade.

6. The centrifugal fan according to claim 1, characterized in that, The rotor assembly includes: A motor shaft is embedded in the center of the stator assembly and is rotatably connected to the stator assembly; A transmission component, which is sleeved on the motor shaft and fixed coaxially with the motor shaft; The rotor body is sleeved on the stator assembly and fixedly connected to the transmission component. When the rotor body rotates, it drives the motor shaft to rotate.

7. The centrifugal fan according to claim 1, characterized in that, The rotor assembly and the centrifugal fan blades are an integral structure.

8. The centrifugal fan according to claim 1, characterized in that, The volute includes a first shell and a second shell, which are disposed opposite to each other and their shapes are matched to form the accommodating cavity.

9. The centrifugal fan according to claim 8, characterized in that, The first housing and the second housing are detachably connected.

10. An air conditioner, characterized in that, The air conditioner includes a centrifugal fan as described in any one of claims 1-9.

11. The air conditioner according to claim 10, characterized in that, The air conditioner also includes a fan mounting plate, which is fixedly connected to the volute.

12. The air conditioner according to claim 11, characterized in that, When at least two centrifugal fans are provided, the at least two centrifugal fans are distributed at intervals along the length direction of the fan mounting plate, and the at least two centrifugal fans are arranged coaxially.

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