An air conditioner

Abstract

The application provides an air conditioner, comprising an indoor unit, a shell and a fresh air module; the fresh air module comprises a fresh air volute, an exhaust air volute, a fan and a driving motor; the fresh air volute is arranged in the shell, and a fresh air inlet and a fresh air outlet are arranged on the fresh air volute; the exhaust air volute is arranged in the shell, and an exhaust air inlet and an exhaust air outlet are arranged on the exhaust air volute; a relief hole is arranged on the side wall adjacent to the fresh air volute and the exhaust air volute; the fan comprises a first blade, a second blade and a hub; the first blade is arranged in the exhaust air volute; the second blade is arranged along the axial direction of the fan and the first blade in sequence, and the second blade and the first blade are relatively fixed; the second blade is arranged in the fresh air volute through the relief hole; the first blade and the second blade are fixedly arranged on the hub; the driving motor is connected with the fan and used for driving the fan to rotate, so that the first blade and the second blade rotate synchronously and in the same direction, thereby simultaneously achieving the discharge of indoor air and the introduction of outdoor fresh air.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more particularly to an air conditioner. Background Technology

[0002] With the continuous iteration and upgrading of air conditioning technology, most air conditioners have gradually evolved from simple temperature regulation devices into indoor environment regulation systems that integrate multiple functions. Some air conditioners are also equipped with fresh air function to introduce fresh outdoor air into the room, thereby improving indoor air quality.

[0003] In related technologies, most air conditioning fresh air modules only have a single fresh air function, that is, they only operate through a single fresh air fan in a single fresh air duct to introduce fresh outdoor air into the room, achieving one-way introduction of fresh outdoor air. However, they can only introduce fresh air and cannot simultaneously expel indoor polluted air, making it difficult to maintain stable and healthy air quality. Moreover, in an indoor environment with closed doors and windows, only introducing fresh air without expelling polluted air can easily lead to poor indoor air circulation and air pressure imbalance. Utility Model Content

[0004] This application discloses an air conditioner that can simultaneously introduce fresh air and exhaust stale air, achieving efficient indoor air replacement.

[0005] To achieve the above objectives, this application discloses an air conditioner, comprising:

[0006] Indoor unit, including:

[0007] case;

[0008] The fresh air module includes:

[0009] Fresh air volute, wherein the fresh air volute is disposed inside the housing, and the fresh air volute is provided with a fresh air inlet and a fresh air outlet;

[0010] An exhaust volute is disposed inside the housing. The exhaust volute is provided with an exhaust air inlet and an exhaust air outlet. The exhaust volute and the fresh air volute are arranged side by side in sequence. The side walls of the fresh air volute and the exhaust volute adjacent to each other are provided with clearance holes.

[0011] A fan, the fan comprising:

[0012] The first blade is rotatably disposed inside the exhaust volute about the axis of the fan. The first blade is used to introduce indoor air into the exhaust volute through the exhaust air inlet and exhaust the indoor air to the outside through the exhaust air outlet.

[0013] The second blade is arranged sequentially with the first blade along the axial direction of the fan, and the second blade and the first blade are fixed relative to each other. The second blade passes through the clearance hole and is rotatably disposed in the fresh air volute around the axial direction of the fan. It is used to introduce outdoor air into the fresh air volute through the fresh air inlet and introduce the outdoor air into the room through the fresh air outlet.

[0014] A hub, wherein the first blade and the second blade are both fixedly disposed on the hub, and the hub is connected between the first blade and the second blade;

[0015] A drive motor is connected to the fan and is used to drive the fan to rotate so that the first blade and the second blade rotate synchronously and in the same direction.

[0016] In this way, by setting up parallel and coordinated fresh air volutes and exhaust volutes, as well as first and second blades driven by the same drive motor, indoor air can be exhausted and outdoor fresh air can be introduced simultaneously, effectively improving the indoor air renewal efficiency and indoor air quality. Furthermore, by using one drive motor to drive the two blades to rotate synchronously, compared to using two independent motors to drive the fresh air and exhaust functions respectively, the number of motors used is reduced, energy consumption is reduced, the control system is simplified, and energy utilization efficiency is improved.

[0017] This application also provides an air conditioner, wherein the drive motor includes:

[0018] stator;

[0019] An outer rotor is fixedly connected to the first blade, and the rotation axis of the outer rotor coincides with the rotation axis of the first blade.

[0020] Thus, since the outer rotor is directly connected to the first blade, no additional complex transmission device is needed. Compared with the traditional method of connecting the motor and fan blades through transmission components such as belts and gears, this simplifies the installation process, reduces installation difficulty and time, and improves production efficiency.

[0021] This application also provides an air conditioner, wherein the drive motor includes:

[0022] stator;

[0023] An outer rotor is fixedly connected to the second blade, and the rotation axis of the outer rotor coincides with the rotation axis of the second blade.

[0024] Thus, since the outer rotor is directly connected to the second blade, no additional complex transmission device is needed. Compared with the traditional method of connecting the motor and fan blades through transmission components such as belts and gears, this simplifies the installation process, reduces installation difficulty and time, and improves production efficiency.

[0025] This application also provides an air conditioner, wherein a receiving cavity is provided on the hub, the axis of the receiving cavity coincides with the rotation axis of the first blade, and the outer rotor is fixedly connected to the inner wall of the receiving cavity.

[0026] In this way, a receiving cavity is set on the hub, the outer rotor is fixedly connected to the inner wall of the receiving cavity, and the axis of the receiving cavity and the first blade place the outer rotor in the receiving cavity of the hub, making the axial layout of the outer rotor and the first blade more compact. This avoids the possible long extension in the axial direction when the drive motor is connected to the first blade, effectively reducing the size of the entire fan in the axial direction and making more reasonable use of the internal space of the air conditioner.

[0027] This application also provides an air conditioner in which the first blade and the second blade are an integral structure.

[0028] Thus, the first and second blades are integrated into one piece, eliminating any gaps between them. Compared to a split structure, the overall structure is stronger and can withstand greater wind force and torque. Under long-term high-speed rotation, it is less prone to deformation or breakage, thereby improving the fan's reliability and lifespan.

[0029] This application also provides an air conditioner in which the first blade and the outer rotor are an integral structure.

[0030] In this way, by designing the first blade and the outer rotor as an integrated structure, the installation process does not require the multiple cumbersome steps of positioning, aligning and connecting the first blade and the outer rotor separately, as is required for a split structure. The entire integrated component can be directly installed in the corresponding position, reducing the number of operation steps in the assembly process and saving installation time and labor costs.

[0031] This application also provides an air conditioner, wherein the diameter of the blade of the first blade is d1, the diameter of the blade of the second blade is d2, and d1≥d2.

[0032] In this way, when the second blade passes through the clearance hole and extends into the fresh air volute, the second blade can pass through the clearance hole more easily, avoiding collision between the second blade and the clearance hole wall, reducing scratches, deformation and other damage to the blade surface caused by friction and impact, and also correspondingly reducing the clearance hole size to reduce the possibility of airflow moving between the exhaust volute and the fresh air volute.

[0033] This application also provides an air conditioner in which, when d1 > d2, d1 - d2 ≥ 1 mm and d1 - d2 ≤ 6 mm.

[0034] Thus, the difference between d1 and d2 is between 1mm and 6mm, ensuring that the air volume difference between the first and second blades is not too large or too small. This avoids excessive differences in rotation frequency caused by large diameter differences, preventing resonance when the blades rotate. At the same time, the balanced air volume difference makes the airflow within the volute more stable, reducing friction noise and eddy noise caused by airflow turbulence, creating a quiet operating environment for users and improving the comfort of air conditioning operation.

[0035] This application also provides an air conditioner, wherein the diameter of the clearance hole is d3, d3≥d2, and d3≤d1.

[0036] This design ensures that the airflow difference between the two blades is neither too large nor too small, avoiding excessive differences in rotation frequency caused by large diameter differences and preventing resonance during blade rotation. At the same time, the balanced airflow difference makes the airflow within the volute smoother, reducing frictional and eddy noise caused by airflow turbulence, creating a quiet operating environment for users and improving the comfort of air conditioning operation. It also ensures that the difference in centrifugal force generated by the first and second blades during rotation is moderate, preventing excessive stress impact on the drive motor or other fixed connection structures, effectively reducing the risk of component loosening and deformation, and improving the reliability of the fresh air function.

[0037] This application also provides an air conditioner, wherein the fresh air volute includes:

[0038] The fresh air volute and the exhaust volute are arranged adjacent to each other, and the clearance hole is located on the common sidewall between the fresh air volute and the exhaust volute. Along the arrangement direction of the fresh air volute and the exhaust volute, there is a gap between the hub and the common sidewall.

[0039] A baffle rib is disposed on the common sidewall and extends toward the inner cavity of the exhaust volute. Along the radial direction of the fan, the baffle rib is located outside the gap. The baffle rib is used to prevent the airflow in the fresh air volute and the exhaust volute from moving between each other.

[0040] Thus, when the airflow moves toward the gap, the baffle ribs can change the direction of the airflow, causing the airflow to flow along the surface of the baffle ribs, thereby preventing it from flowing directly toward the gap and into another volute. Even if some airflow bypasses the baffle ribs and reaches the vicinity of the gap, the speed and energy of the airflow will be reduced due to the blocking effect of the baffle ribs, thereby reducing the possibility of airflow escaping.

[0041] This application also provides an air conditioner, wherein the width of the gap between the hub and the common sidewall is L1 along the arrangement direction of the fresh air volute and the exhaust volute, and the extension length of the barrier rib along the arrangement direction of the fresh air volute and the exhaust volute is L2, where L2-L1≥0mm and L2-L1≤5mm.

[0042] Thus, L2-L1≥0mm ensures that the barrier rib can completely cover the gap between the hub and the common side wall, thereby effectively preventing the airflow in the fresh air volute and the exhaust volute from interfering with each other through the gap, ensuring the independence and effectiveness of the fresh air and exhaust systems, maintaining the normal flow path of their respective airflows, and improving the overall performance of the ventilation system. L2-L1≤5mm avoids the barrier rib being too long and interfering with the airflow inside the exhaust volute. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of an air conditioner provided in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of the fresh air module provided in an embodiment of this application;

[0046] Figure 3 This is an exploded view of the fresh air module provided in the embodiments of this application;

[0047] Figure 4 This is a schematic diagram of the connection between the fan and the drive motor provided in an embodiment of this application;

[0048] Figure 5 This is a top view of the fresh air module provided in the embodiment of this application;

[0049] Figure 6 yes Figure 5 Sectional view at PP;

[0050] Figure 7 yes Figure 6 A cross-sectional view of the enlarged view at point A in the middle;

[0051] Figure 8 This is a side view of the connection between the fan and the drive motor provided in an embodiment of this application;

[0052] Figure 9 yes Figure 8Sectional view at SS;

[0053] Figure 10 This is a schematic diagram of a fan provided in an embodiment of this application.

[0054] Explanation of main figure symbols

[0055] 1-Air conditioner;

[0056] 10-Indoor unit;

[0057] 11-Shell;

[0058] 100-Fresh Air Module;

[0059] 110 - Fresh air volute; 110a - Clearance hole; 1101 - Fresh air inlet; 1102 - Fresh air outlet;

[0060] 120 - Exhaust volute; 1201 - Exhaust inlet; 1202 - Exhaust outlet;

[0061] 130 - Fan; 1301 - First blade; 1302 - Second blade; 1303 - Hub; 1303a - Receiving cavity;

[0062] 140 - Drive motor; 1401 - Stator; 1402 - Outer rotor;

[0063] 150-Fresh Air Purification Room;

[0064] 160 - Common sidewall; 1601 - Barrier reinforcement. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0067] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0068] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0069] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components whose specific types and structures may be the same or different, and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0070] As mentioned in the background section, in the existing technology, most air conditioning fresh air modules only have a single fresh air function, that is, they only operate through a single fresh air fan in a single fresh air duct to introduce fresh outdoor air into the room, achieving one-way introduction of fresh outdoor air. However, they can only introduce fresh air and cannot simultaneously exhaust indoor polluted air, making it difficult to maintain stable and healthy air quality. Moreover, in an indoor environment with closed doors and windows, only introducing fresh air without expelling polluted air can easily lead to poor indoor air circulation and air pressure imbalance.

[0071] To address the aforementioned issues, this application provides an air conditioner that, by arranging a fresh air volute and an exhaust volute arranged side-by-side and cooperating with each other, as well as a first blade and a second blade driven by the same drive motor, can simultaneously exhaust indoor air and introduce fresh outdoor air, effectively improving indoor air renewal efficiency and enhancing indoor air quality.

[0072] The following will describe specific embodiments and appendices. Figure 1-10 The technical solution of the air conditioner in this application will be further explained.

[0073] like Figure 1 As shown, the air conditioner 1 includes an indoor unit 10, which is the part of the air conditioner 1 installed indoors. It is mainly responsible for delivering treated air to the indoor space to achieve functions such as regulating indoor temperature, humidity and air quality.

[0074] like Figure 1As shown, the indoor unit 10 may include a housing 11. The housing 11 of the indoor unit 10 typically houses important components such as an evaporator, a fan, a drain pan, an electrical control board, and a temperature sensor. The evaporator is used for heat exchange, the fan drives air circulation, the drain pan collects condensate, the electrical control board is responsible for controlling the operation, and the temperature sensor monitors the indoor temperature so that the indoor unit 10 can perform its relevant functions.

[0075] like Figure 2 As shown, the indoor unit 10 may also include a fresh air module 100, which can filter and purify fresh outdoor air and then deliver it indoors to improve indoor air quality and keep the air fresh.

[0076] like Figure 2 and Figure 3 As shown, the fresh air module 100 may include a fresh air volute 110, which is disposed inside the housing 11. The fresh air volute 110 is provided with a fresh air inlet 1101 and a fresh air outlet 1102. The fresh air volute 110 is used to guide the flow of fresh air. Fresh air enters the volute from the fresh air inlet 1101, and after a reasonable flow channel design inside the volute, a stable and uniform airflow distribution is achieved. Then, it is delivered out from the fresh air outlet 1102 to ensure that the fresh air can enter the indoor space efficiently and smoothly.

[0077] like Figure 2 and Figure 3 As shown, the fresh air module 100 may include an exhaust volute 120, which is disposed inside the housing 11. The exhaust volute 120 is provided with an exhaust air inlet 1201 and an exhaust air outlet 1202. The exhaust volute 120 and the fresh air volute 110 are arranged side by side in sequence. The side walls adjacent to the fresh air volute 110 and the exhaust volute 120 are provided with clearance holes 110a.

[0078] like Figure 2 and Figure 3 As shown, the fresh air module 100 may include a fan 130, which may be a centrifugal fan 130 or a cross-flow fan 130, etc., and is not limited here.

[0079] like Figures 4 to 6 As shown, the fan 130 may include a first blade 1301. The first blade 1301 is disposed inside the exhaust volute 120 around the fan 130. The first blade 1301 is used to introduce indoor air into the exhaust volute 120 through the exhaust air inlet 1201 and exhaust indoor air to the outside through the exhaust air outlet 1202.

[0080] like Figures 4 to 7As shown, the fan 130 may include a second blade 1302. The second blade 1302 is arranged sequentially with the first blade 1301 along the axial direction of the fan 130, and the second blade 1302 and the first blade 1301 are relatively fixed. The second blade 1302 passes through the clearance hole 110a and is disposed in the fresh air volute 110, for introducing outdoor air into the fresh air volute 110 through the fresh air inlet 1101 and introducing outdoor air into the room through the fresh air outlet 1102.

[0081] like Figure 8 and Figure 9 As shown, the fan 130 also includes a hub 1303, and the first blade 1301 and the second blade 1302 are both fixedly disposed on the hub 1303, and the hub 1303 is connected between the first blade 1301 and the second blade 1302.

[0082] like Figure 6 As shown, the fresh air module 100 may include a drive motor 140, which is connected to a fan 130 and is used to drive the fan 130 to rotate so that the first blade 1301 and the second blade 1302 rotate synchronously and in the same direction.

[0083] When the air conditioner 1 turns on the fresh air function, the drive motor 140 starts and drives the fan 130 to rotate. Since the first blade 1301 and the second blade 1302 are relatively fixed, they will rotate synchronously and in the same direction. This causes the first blade 1301 to rotate inside the exhaust volute 120, generating suction and drawing indoor air into the exhaust volute 120 through the exhaust air inlet 1201. Then, the air is pushed out to the outside through the exhaust air outlet 1202, thus exhausting the indoor air. At the same time, the second blade 1302 rotates inside the fresh air volute 110, drawing outdoor air into the fresh air volute 110 through the fresh air inlet 1101. Then, the outdoor air is drawn into the room through the fresh air outlet 1102, thus completing the introduction of fresh air.

[0084] Thus, by setting up parallel and cooperating fresh air volute 110 and exhaust volute 120, and a first blade 1301 and a second blade 1302 driven by the same drive motor 140, indoor air can be exhausted and outdoor fresh air can be introduced simultaneously, effectively improving the indoor air renewal efficiency and indoor air quality. Furthermore, by using a single drive motor 140 to drive the two blades to rotate synchronously, compared to using two independent motors to drive the fresh air and exhaust functions respectively, the number of motors used is reduced, energy consumption is reduced, the control system is simplified, and energy utilization efficiency is improved.

[0085] Furthermore, this embodiment utilizes a single fan 130 to simultaneously achieve both fresh air and exhaust functions. Compared to installing the fresh air fan 130 and the exhaust fan 130 separately in the fresh air volute 110 and the exhaust volute 120, which requires two independent fan 130 installation operations, including fixing the fan 130 and connecting it to the drive motor 140, this embodiment only requires inserting the second blade 1302 of the fan 130 through the clearance hole 110a into the fresh air volute 110 to complete the installation of the fan 130, reducing the installation steps and simplifying the installation process.

[0086] In addition, compared to installing the fresh air fan 130 and the exhaust fan 130 in the fresh air volute 110 and the exhaust volute 120 respectively, in order to ensure the normal operation of the fresh air fan 130 and the exhaust fan 130, a certain gap is required between the fresh air fan 130 and the side wall of the fresh air volute 110, and between the exhaust fan 130 and the side wall of the exhaust volute 120, which restricts the volume of the fresh air fan 130 and the exhaust fan 130. In this embodiment, by extending the second blade 1302 of the fan 130 through the clearance hole 110a into the fresh air volute 110, the axial height of the first blade 1301 and the second blade 1302 is not restricted by the side walls of the fresh air volute 110 and the exhaust volute 120, thereby increasing the axial height of the first blade 1301 and the second blade 1302, and thus increasing the fresh air volume.

[0087] In some possible embodiments, such as Figures 8 to 10 As shown, the drive motor 140 may include a stator 1401; the stator 1401 typically includes a stator core, stator windings, and a frame. The stator core is usually made of stacked silicon steel sheets, and its surface has evenly distributed slots for placing the stator windings. The stator windings are generally made of insulated wires. The frame is used to fix the stator core and stator windings, and also serves as the motor's support structure. In this embodiment, the frame can be fixed to the side wall of the exhaust volute 120. The frame is usually made of materials such as cast iron or aluminum alloy, and has good mechanical strength and stability, capable of withstanding various forces and vibrations generated during motor operation, ensuring the normal operation of the motor.

[0088] like Figures 8 to 10As shown, the drive motor 140 may further include an outer rotor 1402, which is fixedly connected to the first blade 1301, and the rotation axis of the outer rotor 1402 coincides with the rotation axis of the first blade 1301. The outer rotor 1402 typically includes a rotor core, permanent magnets or windings, and a metal housing 11. The rotor core is generally made of stacked silicon steel sheets, similar to the stator core, in order to reduce eddy current losses and hysteresis losses. The core of the outer rotor 1402 is usually cylindrical and is fitted on the outside of the stator 1401. For a permanent magnet outer rotor motor, permanent magnets are installed on the outer surface of the rotor core. The magnetic field generated by these permanent magnets interacts with the magnetic field generated by the stator windings, causing the rotor to rotate. If it is a wound-rotor outer rotor motor, windings are placed in the slots of the rotor core, and torque is generated through electromagnetic induction with the stator windings. In this embodiment, the first blade 1301 can be fixed to the metal housing 11.

[0089] When alternating current is applied to the stator winding, a rotating magnetic field is generated. Under the action of this rotating magnetic field, the permanent magnet or winding on the outer rotor 1402 will be subjected to electromagnetic force, thereby generating torque, causing the outer rotor 1402 to rotate around the axis of the stator 1401. The outer rotor 1402 transmits its rotational motion to the first blade 1301, and the first blade 1301 drives the second blade 1302, which is fixed to it, to rotate.

[0090] Thus, since the outer rotor 1402 is directly connected to the first blade 1301, no additional complex transmission device is needed. Compared with the traditional method of connecting the motor and the fan blade 130 through transmission components such as belts and gears, the installation process is simplified, the installation difficulty and time are reduced, and the production efficiency is improved.

[0091] Furthermore, the outer rotor 1402 is fixedly connected to the first blade 1301, and the power of the motor can be directly transmitted to the first blade 1301. This avoids energy loss caused by transmitting power through intermediate transmission components, such as slippage in belt drive and inter-tooth friction in gear drive. This allows the drive motor 140 to convert electrical energy into mechanical energy more efficiently and drive the first blade 1301 to rotate, thereby improving the transmission efficiency of the entire fan 130 system and reducing energy consumption.

[0092] In addition, the fresh air module 100 may also include a fresh air filtration chamber 150. The inner cavity of the fresh air filtration chamber 150 is connected to the inner cavity of the fresh air volute 110. When the fresh air fan 130 rotates, it can draw indoor air into the fresh air filtration chamber 150 to filter outdoor air. The fresh air volute 110 is coaxially arranged with the fresh air filtration chamber 150 and the exhaust volute 120, and is located between the fresh air filtration chamber 150 and the exhaust volute 120. The exhaust air inlet 1201 is usually located on the side wall of the exhaust volute 120 and is exposed to the interior. In this embodiment, the drive motor 140 is disposed in the exhaust volute 120. When the drive motor 140 malfunctions, maintenance personnel can directly inspect the drive motor 140 from the indoor air intake 1201 without disassembling too many parts to find the fault point, saving maintenance time and effort. Also, when installing the indoor unit 10 of the air conditioner 1, for components in the exhaust volute 120 of the fresh air module 100, such as the drive motor 140 and the exhaust fan 130, they can be installed in the exhaust volute 120 first, and then the entire exhaust volute 120 can be installed into the housing 11 of the indoor unit 10 through the exhaust intake 1201, improving installation efficiency.

[0093] Of course, the drive motor 140 is not limited to the above form. For example, the drive motor 140 can also be a stator-inner rotor motor with belt drive, using a traditional stator-inner rotor motor, and the rotation of the motor is transmitted to the first blade 1301 of the fan 130 through the belt.

[0094] In some possible embodiments, the drive motor 140 may include a stator 1401.

[0095] The drive motor 140 may also include an outer rotor 1402, which is fixedly connected to the second blade 1302, and the rotation axis of the outer rotor 1402 coincides with the rotation axis of the second blade 1302.

[0096] Thus, since the outer rotor is directly connected to the second blade 1302, no additional complex transmission device is needed. Compared with the traditional method of connecting the motor and fan blades through transmission components such as belts and gears, this simplifies the installation process, reduces installation difficulty and time, and improves production efficiency.

[0097] In some possible embodiments, such as Figure 9 and Figure 10 As shown, a receiving cavity 1303a is provided on the hub 1303. The axis of the receiving cavity 1303a coincides with the rotation axis of the first blade 1301. The outer rotor 1402 is fixedly connected to the inner wall of the receiving cavity 1303a.

[0098] Thus, a receiving cavity 1303a is provided on the hub 1303, and the outer rotor 1402 is fixedly connected to the inner wall of the receiving cavity 1303a. The axis of the receiving cavity 1303a and the first blade place the outer rotor 1402 in the receiving cavity 1303a of the hub 1303, making the axial layout of the outer rotor 1402 and the first blade 1301 more compact. This avoids the possible long extension in the axial direction when the drive motor 140 is connected to the first blade 1301, effectively reducing the size of the entire fan 130 in the axial direction, and making more reasonable use of the internal space of the air conditioner 1.

[0099] Furthermore, the axis of the receiving cavity 1303a coincides with the rotation axis of the first blade 1301, ensuring that the outer rotor 1402 is strictly concentric with the rotation axis of the first blade 1301 after installation. This ensures that the driving force of the outer rotor 1402 can be uniformly and stably transmitted to the first blade 1301 during rotation, avoiding unbalanced forces caused by eccentricity, thereby reducing blade vibration and wear, and improving the stability and reliability of the fan 130. At the same time, the inner wall of the receiving cavity 1303a provides stable support for the outer rotor 1402, effectively bearing the centrifugal force and other external forces generated by the outer rotor 1402 during high-speed rotation, improving the firmness of the connection, reducing the risk of failure caused by loosening of the connection due to long-term operation, and extending the service life of the fan 130 and the entire air conditioner 1.

[0100] In some possible embodiments, such as Figure 9 As shown, the first blade 1301 and the second blade 1302 are an integral structure.

[0101] Thus, the first blade 1301 and the second blade 1302 are integrated into one piece, so there is no gap between them. Compared with the split structure, the overall structure is stronger and can withstand greater wind force and torque. Under long-term high-speed rotation, it is not easy to deform or break, thereby improving the reliability and service life of the fan 130.

[0102] Furthermore, the first blade 1301 and the second blade 1302 of the integrated structure only require one installation operation during installation. Compared with installing two blades separately, this reduces installation steps and time, improves installation efficiency, and also reduces installation errors that may be caused by multiple installations.

[0103] The first blade 1301 and the second blade 1302 can be integrally formed by injection molding or casting, and no limitation is made here.

[0104] In some possible embodiments, such as Figure 9 As shown, the metal shell of the first blade 1301 and the outer rotor 1402 are integrally formed by injection molding.

[0105] In this way, the metal shells of the first blade 1301 and the outer rotor 1402 are integrally formed by injection molding. Unlike the split structure, there are no complicated steps such as positioning, aligning and connecting the first blade 1301 and the outer rotor 1402 separately. The entire integral component can be directly installed in the corresponding position, which reduces the operation steps in the assembly process and saves installation time and labor costs.

[0106] Furthermore, the integrated structure eliminates the connection interface between the first blade 1301 and the metal shell of the outer rotor 1402, avoiding structural instability caused by loose connections, gaps, or misalignments. During the operation of the fan 130, it can withstand greater centrifugal force and dynamic load, reducing the risk of failure caused by relative movement of components or connection failure, and improving the reliability and service life of the entire fan 130 system. In addition, during the manufacturing process, the metal shells of the first blade 1301 and the outer rotor 1402 are processed and assembled as a whole, which can better ensure the concentricity and dynamic balance between the two. Precise concentricity and good dynamic balance can effectively reduce the vibration and noise of the fan 130 during operation, making the fan 130 run more smoothly.

[0107] In some possible embodiments, such as Figure 9 and Figure 10 As shown, the diameter of the blade fan of the first blade 1301 is d1, and the diameter of the blade fan of the second blade 1302 is d2, and d1≥d2.

[0108] Thus, when the second blade 1302 passes through the clearance hole 110a and extends into the fresh air volute 110, the second blade 1302 can pass through the clearance hole 110a more easily, avoiding collision between the second blade 1302 and the wall of the clearance hole 110a, reducing scratches, deformation and other damage to the blade surface caused by friction and impact, and also correspondingly reducing the size of the clearance hole 110a, so as to reduce the possibility of airflow moving around in the exhaust volute 120 and the fresh air volute 110.

[0109] In some possible embodiments, when d1 > d2, d1 - d2 ≥ 1 mm and d1 - d2 ≤ 6 mm.

[0110] Thus, the difference between d1 and d2 is between 1mm and 6mm, ensuring that the air volume difference between the first blade 1301 and the second blade 1302 is not too large or too small. This avoids excessive differences in rotation frequency caused by excessive diameter differences, preventing resonance when the blades rotate. At the same time, the balanced air volume difference makes the airflow within the volute more stable, reducing friction noise and eddy noise caused by airflow turbulence, creating a quiet operating environment for users and improving the comfort of air conditioner 1.

[0111] Furthermore, the difference between d1 and d2 is between 1mm and 6mm, which ensures that the centrifugal force generated by the first blade 1301 and the second blade 1302 during rotation is moderate, and will not cause excessive stress impact on the drive motor 140 or other fixed connection structures, effectively reducing the risk of component loosening and deformation, and improving the reliability of the fresh air function.

[0112] In some possible embodiments, such as Figure 7 As shown, the diameter of the clearance hole 110a is d3, d3≥d2, and d3≤d1.

[0113] The fact that d3≥d2 ensures that the second blade 1302 can pass smoothly through the clearance hole 110a for installation provides sufficient space for the installation process. This avoids situations where the second blade 1302 cannot pass through or is difficult to install due to the clearance hole 110a being too small, thereby improving installation efficiency and reducing installation difficulty.

[0114] The d3≤d1 ensures that the clearance hole 110a is not too large. Under the premise of ensuring the installation of the second blade 1302, it forms a reasonable matching relationship with the size of the first blade 1301 and the second blade 1302, preventing the clearance hole 110a from providing an excessively large channel for airflow to move around, and reducing the possibility of airflow moving around directly through the clearance hole 110a.

[0115] In some possible embodiments, such as Figure 7 As shown, the fresh air volute 110 and the exhaust volute 120 are arranged adjacent to each other, and the clearance hole 110a is located on the common side wall 160 between the fresh air volute 110 and the exhaust volute 120. Along the arrangement direction of the fresh air volute 110 and the exhaust volute 120, there is a gap between the hub 1303 and the common side wall 160.

[0116] like Figure 8 As shown, the fresh air volute 110 may include a baffle rib 1601. The baffle rib 1601 is disposed on the common side wall 160 and extends toward the inner cavity of the exhaust volute 120. Along the radial direction of the fan 130, the baffle rib 1601 is located outside the gap. The baffle rib 1601 is used to prevent the airflow in the fresh air volute 110 and the exhaust volute 120 from moving between each other.

[0117] When the fan 130 is running, airflows with different directions and pressures are formed in the fresh air volute 110 and the exhaust volute 120. Since the fresh air volute 110 and the exhaust volute 120 are arranged adjacent to each other and have clearance holes 110a on their common sidewall 160, without any obstruction measures, the airflow may flow between each other through the clearance holes 110a and the gaps around the common sidewall 160. In this embodiment, the obstruction rib 1601 is provided on the common sidewall 160 and extends toward the inner cavity of the exhaust volute 120, and is located outside the gap along the radial direction of the fan 130. Thus, when the airflow flows toward the gap, the obstruction rib 1601 can change the flow of the airflow. The direction of airflow is directed to flow along the surface of the baffle 1601, thereby preventing it from flowing directly to the gap and into another volute. Even if some airflow bypasses the baffle 1601 and reaches the vicinity of the gap, the speed and energy of the airflow will be weakened due to the blocking effect of the baffle 1601, thus reducing the possibility of airflow turbulence. This ensures that the fresh air in the fresh air volute 110 can be efficiently delivered to the room, and the polluted air in the exhaust volute 120 can be smoothly discharged to the outside, avoiding the mixing of fresh air and exhaust air. This allows the fresh air system and the exhaust air system to operate independently and efficiently, improving the ventilation efficiency of the entire ventilation system.

[0118] In some possible embodiments, such as Figure 7 As shown, along the arrangement direction of the fresh air volute 110 and the exhaust volute 120, the width of the gap between the hub 1303 and the common sidewall 160 is L1, and along the arrangement direction of the fresh air volute 110 and the exhaust volute 120, the extension length of the barrier rib 1601 in the arrangement direction of the fresh air volute 110 and the exhaust volute 120 is L2, where L2-L1≥0mm and L2-L1≤5mm.

[0119] The arrangement direction of the fresh air volute 110 and the exhaust volute 120 is as follows: Figure 8 The direction indicated by the middle arrow X.

[0120] Thus, L2-L1≥0mm ensures that the barrier rib 1601 can completely cover the gap between the hub 1303 and the common sidewall 160, thereby effectively preventing the airflow in the fresh air volute 110 and the exhaust volute 120 from interfering with each other through the gap, ensuring the independence and effectiveness of the fresh air and exhaust systems, maintaining the normal flow path of their respective airflows, and improving the overall performance of the ventilation system. L2-L1≤5mm avoids the barrier rib 1601 being too long and interfering with the airflow inside the exhaust volute 120.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the air conditioner of this application, and are not intended to limit it. Although the air conditioner of this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air conditioner, characterized in that, include: Indoor unit, including: case; The fresh air module includes: Fresh air volute, wherein the fresh air volute is disposed inside the housing, and the fresh air volute is provided with a fresh air inlet and a fresh air outlet; An exhaust volute is disposed inside the housing. The exhaust volute is provided with an exhaust air inlet and an exhaust air outlet. The exhaust volute and the fresh air volute are arranged side by side in sequence. The side walls of the fresh air volute and the exhaust volute adjacent to each other are provided with clearance holes. A fan, the fan comprising: The first blade is disposed inside the exhaust volute. The first blade is used to introduce indoor air into the exhaust volute through the exhaust air inlet and to exhaust indoor air to the outside through the exhaust air outlet. The second blade is arranged sequentially with the first blade along the axial direction of the fan, and the second blade and the first blade are fixed relative to each other. The second blade passes through the clearance hole and is disposed in the fresh air volute, for introducing outdoor air into the fresh air volute through the fresh air inlet and introducing the outdoor air into the room through the fresh air outlet. A hub, wherein the first blade and the second blade are both fixedly disposed on the hub, and the hub is connected between the first blade and the second blade; A drive motor is connected to the fan and is used to drive the fan to rotate so that the first blade and the second blade rotate synchronously and in the same direction.

2. The air conditioner according to claim 1, characterized in that, The drive motor includes: stator; An outer rotor is fixedly connected to the first blade, and the rotation axis of the outer rotor coincides with the rotation axis of the first blade.

3. The air conditioner according to claim 1, characterized in that, The drive motor includes: stator; An outer rotor is fixedly connected to the second blade, and the rotation axis of the outer rotor coincides with the rotation axis of the second blade.

4. The air conditioner according to claim 2, characterized in that, The hub is provided with a receiving cavity, the axis of which coincides with the rotation axis of the first blade, and the outer rotor is fixedly connected to the inner wall of the receiving cavity.

5. The air conditioner according to claim 1, characterized in that, The first blade and the second blade are an integral structure.

6. The air conditioner according to claim 1, characterized in that, The diameter of the first blade is d1, and the diameter of the second blade is d2, and d1 ≥ d2.

7. The air conditioner according to claim 6, characterized in that, When d1 > d2, d1 - d2 ≥ 1 mm and d1 - d2 ≤ 6 mm.

8. The air conditioner according to claim 6, characterized in that, The diameter of the clearance hole is d3, where d3 ≥ d2 and d3 ≤ d1.

9. The air conditioner according to claim 7, characterized in that, The fresh air volute and the exhaust volute are arranged adjacent to each other, and the clearance hole is located on the common sidewall between the fresh air volute and the exhaust volute. Along the arrangement direction of the fresh air volute and the exhaust volute, there is a gap between the hub and the common sidewall. The fresh air volute includes: A baffle rib is disposed on the common sidewall and extends toward the inner cavity of the exhaust volute. Along the radial direction of the fan, the baffle rib is located outside the gap. The baffle rib is used to prevent the airflow in the fresh air volute and the exhaust volute from moving between each other.

10. The air conditioner according to claim 9, characterized in that, Along the arrangement direction of the fresh air volute and the exhaust volute, the width of the gap between the hub and the common sidewall is L1, and along the arrangement direction of the fresh air volute and the exhaust volute, the extension length of the barrier rib in the arrangement direction of the fresh air volute and the exhaust volute is L2, where L2-L1≥0mm and L2-L1≤5mm.

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