Wall-mounted air conditioner

Abstract

The utility model discloses a wall -hanging air conditioner, including main part, fresh air fan, and fresh air fan includes fresh air wheel disc, first fresh air blade and second fresh air blade, and the length of second fresh air blade is less than the length of first fresh air blade, on the axial direction of fresh air fan, the length of second fresh air blade is h12, and the length of first fresh air blade is h11, satisfy: 0.1<=h12 / h11<=0.45. The length relation of first fresh air blade and second fresh air blade is set to the thickness size of adjusting the noise in the rotation process of fresh air fan and fresh air fan in main part.

Description

[0001] This application is a divisional application of application number 202422141842.0 filed on August 30, 2024, entitled "Wall-mounted Air Conditioner". Technical Field

[0002] This utility model relates to the field of air conditioner technology, and in particular to a wall-mounted air conditioner. Background Technology

[0003] In related technologies, some wall-mounted air conditioners are equipped with ventilation components, which include a fresh air volute and a fresh air fan located inside the volute. When the fresh air fan rotates, it draws outdoor air into the volute and then delivers it into the room. As the fresh air fan rotates, the air trapped by the different blades comes into contact with the volute tongue at the air outlet of the volute. Because the fresh air fan operates at high speed, this generates a sharp noise, affecting the user experience. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a wall-mounted air conditioner that can reduce the noise of the fresh air fan.

[0005] A wall-mounted air conditioner includes: a main body comprising a casing, the casing having an internal cavity, a heat exchange inlet and a heat exchange outlet on the casing, the heat exchange inlet being located above the heat exchange outlet in the height direction of the main body; an indoor heat exchanger disposed within the internal cavity; a base disposed within the internal cavity, on which a volute air duct is formed; a heat exchange fan disposed within the volute air duct and located on the side of the indoor heat exchanger away from the heat exchange inlet; a first motor disposed within the internal cavity and located at one end in the length direction of the main body, for driving the heat exchange fan to rotate, thereby exchanging heat between air and the indoor space inside the air conditioner; a fresh air fan, which is an axially inlet and radially outlet centrifugal fan, located on the side of the heat exchange fan away from the first motor; a fresh air volute, within which a fresh air duct is formed, and the fresh air fan is installed on the internal cavity. The fresh air volute has a fresh air inlet and a fresh air outlet. The rotation of the fresh air fan allows outdoor air to enter the fresh air volute through the fresh air inlet and allows outdoor air entering the volute to enter the room through the fresh air outlet. The fresh air fan includes a fresh air impeller, a first fresh air blade, and a second fresh air blade. Axially, the first fresh air blade is located between the second fresh air blade and the fresh air inlet. Axially, the length of the second fresh air blade is shorter than the length of the first fresh air blade. Multiple first fresh air blades are arranged circumferentially on the fresh air impeller, with the first fresh air blades located at the edge of the impeller. Similarly, multiple second fresh air blades are arranged circumferentially on the fresh air impeller, with the second fresh air blades located at the edge of the impeller.

[0006] Along the axial direction of the fresh air fan, the length of the second fresh air blade is h12, and the length of the first fresh air blade is h11, satisfying: 0.1≤h12 / h11≤0.45.

[0007] In some embodiments, 0.2 ≤ h12 / h11 ≤ 0.3.

[0008] In some embodiments, 0.3 ≤ h12 / h11 ≤ 0.4.

[0009] In some embodiments, 0.4 ≤ h12 / h11 ≤ 0.45.

[0010] In some embodiments, in the circumferential direction of the fresh air fan, the distance between two adjacent first fresh air blades and the distance between two adjacent second fresh air blades are both C, and the first fresh air blades and the second fresh air blades are staggered by a distance D, satisfying: 0.1≤D / C≤0.8.

[0011] In some embodiments, 0.1 ≤ D / C ≤ 0.5.

[0012] In some embodiments, the fresh air volute includes: a first volute and a second volute, the second volute being located on the side of the first volute facing the heat exchange fan and detachably connected to the first volute, a volute cavity being formed between the second volute and the first volute, and the fresh air fan being located within the volute cavity; the first volute being located on the side of the second fresh air blade away from the fresh air impeller, and the second volute being located on the side of the first fresh air blade away from the fresh air impeller; the second volute having an axial ventilation opening at its radial center, the axial air inlet end of the first fresh air blade being disposed facing the axial ventilation opening, the fresh air inlet being located on the second volute, and in the axial direction of the fresh air fan, the fresh air inlet being located on the side of the axial ventilation opening away from the second fresh air blade.

[0013] In some embodiments, the second volute includes: a second volute half and a fan cover. The second volute half is located on the side of the first volute facing the heat exchange fan and is detachably connected to the first volute. The second volute half has an axial ventilation opening at its center in the radial direction. A volute cavity V is formed between the second volute half and the first volute. A fresh air fan is located in the volute cavity V and its axial air inlet is positioned facing the axial ventilation opening. The fan cover is located on the side of the second volute half facing the heat exchange fan and is detachably connected to the second volute half.

[0014] In some embodiments, the fresh air impeller is provided with a disc hole, the disc hole axially penetrates the fresh air impeller, the disc hole extends radially along the fresh air impeller, and in the radial direction of the fresh air impeller, the width of the end of the disc hole away from the center of the fresh air impeller is greater than the width of the end of the disc hole near the center of the fresh air impeller.

[0015] In some embodiments, the fresh air impeller is provided with a disc hole that extends axially through the fresh air impeller. In the radial direction of the fresh air fan, the disc hole is located on the side of the first fresh air blade and the second fresh air blade closer to the center of the fresh air impeller. The disc hole is used to guide outdoor air entering the volute cavity through the fresh air inlet and the axial ventilation port from the side of the fresh air impeller facing the first fresh air blade to the side of the fresh air impeller facing the second fresh air blade.

[0016] The distance from the disc hole to either the first fresh air blade or the second fresh air blade is less than the distance from the disc hole to the center of the fresh air disc. Attached Figure Description

[0017] Figure 1This is a perspective view of the main body of the wall-mounted air conditioner in some embodiments (part of the casing is hidden in the figure);

[0018] Figure 2 This is a front view of the main body of the wall-mounted air conditioner in some other embodiments (the casing is hidden in the figure);

[0019] Figure 3 This is a perspective view of the interior of the main body in one direction in some embodiments;

[0020] Figure 4 This is a perspective view of the interior of the main body from another direction in some embodiments;

[0021] Figure 5 This is a perspective view of the bidirectional ventilation assembly in some embodiments;

[0022] Figure 6 This is a perspective view of the bidirectional ventilation assembly in some embodiments from another angle;

[0023] Figure 7 This is a side view of the bidirectional ventilation assembly in some embodiments;

[0024] Figure 8 for Figure 7 A cross-sectional view along the AA direction;

[0025] Figure 9 This is an exploded view of the second motor in some embodiments;

[0026] Figure 10 A cross-sectional view of the second motor in some embodiments;

[0027] Figure 11 This is a cross-sectional view of the exhaust fan in some embodiments;

[0028] Figure 12 This is a front view of the fresh air fan in some embodiments;

[0029] Figure 13 A side view of the fresh air fan in some embodiments;

[0030] Figure 14 This is an exploded view of a bidirectional ventilation assembly (hidden parts) in one direction in some embodiments;

[0031] Figure 15 This is an exploded view of the bidirectional ventilation assembly in another direction in some embodiments;

[0032] Figure 16 This is a view of the fresh air fan from another side in some embodiments;

[0033] Figure 17 yes Figure 12 A cross-sectional view along the BB direction;

[0034] Figure 18 These are perspective views of the fresh air fan in some embodiments;

[0035] Figure 19 This is yet another perspective view of the fresh air fan in some embodiments;

[0036] Figure 20 This is a perspective view of the exhaust fan in some other embodiments.

[0037] Figure label:

[0038] Wall-mounted air conditioner 10000, main body 1000, casing 1, accommodating cavity V1, heat exchange air inlet 101, heat exchange air outlet 102, casing air inlet 103, first ventilation duct V04, pipe clearance opening 104, casing air outlet 105, indoor heat exchanger 2, base 3, volute air duct V03, end plate 31, heat exchange fan 41, first motor 42, second motor 5, stator 51, rotor 52, motor housing 53, output shaft 532, fresh air fan 6, fresh air impeller 61, fresh air impeller body 611, impeller hole 612, connecting part 613, connecting hole 6131, fresh air blade 62, first fresh air blade 621, second fresh air blade 622, first wheel rim 63, exhaust fan 7, accommodating slot V07, exhaust impeller 7 1. Exhaust blade 72. Blade side edge 721. Side edge recess 73. Protrusion 74. Exhaust wheel ring 75. Fresh air volute 8. Fresh air duct V01. Volute cavity V011. Fresh air cavity V012. Fresh air inlet 801. Fresh air outlet 802. Mounting port 803. Purification inlet 804. First volute 81. First volute end plate 811. First volute surrounding plate 812. Recess 813. Perforation 814. Second volute 82. Second volute half 821. Axial ventilation port 8211. Fan cover 822. Exhaust volute 9. Exhaust duct V02. Exhaust inlet 901. Exhaust outlet 902. Air guide ring 91. Purification component 11. Filter screen 111. Fresh air inlet pipe 141. Exhaust outlet pipe 142. Air guide grille 16. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] This application describes the structure of a wall-mounted air conditioner 10000.

[0043] Before proceeding, let's introduce the structure of a common air conditioner. The most common type of air conditioner is the split-type air conditioner, which consists of an indoor unit and an outdoor unit. The indoor and outdoor units are connected by pipes to transfer refrigerant. The indoor unit includes an indoor heat exchanger 2 and a heat exchange fan 41.

[0044] The outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan, and a throttling device. The compressor, outdoor heat exchanger, throttling device, and indoor heat exchanger 2 are connected in sequence to form a refrigerant circuit. The refrigerant circulates in the refrigerant circuit and exchanges heat with the air through the outdoor heat exchanger and indoor heat exchanger 2 respectively to achieve the air conditioner's cooling mode or heating mode.

[0045] The indoor heat exchanger 2 is configured to exchange heat between indoor air and refrigerant transported in the indoor heat exchanger 2. In some embodiments, the indoor heat exchanger 2 further includes heat exchange fins to increase the contact area between the indoor air and the refrigerant transported in the indoor heat exchanger 2, thereby improving the heat exchange efficiency between the indoor air and the refrigerant.

[0046] The heat exchange fan 41 is configured to draw indoor air into the indoor unit and deliver the indoor air, which has been heated by the indoor heat exchanger 2, into the room. The heat exchange fan 41 provides power for the flow of indoor air.

[0047] This application discloses a wall-mounted air conditioner 10000, which is an indoor unit. The wall-mounted air conditioner 10000 is typically installed on a wall, for example, in the upper area of ​​an interior wall.

[0048] The following description, with reference to the accompanying drawings, describes a wall-mounted air conditioner 10000 according to an embodiment of this application.

[0049] According to the embodiments of this application, the wall-mounted air conditioner 10000, such as Figure 1 and Figure 2 As shown, it includes: main body 1000.

[0050] The main body 1000 includes a casing 1. An accommodating cavity V1 is formed inside the casing 1, and a heat exchange air inlet 101 and a heat exchange air outlet 102 are formed on the casing 1. The casing 1 serves a protective function and constitutes the overall external structure of the wall-mounted air conditioner 10000.

[0051] Typically, the casing 1 is a long, rectangular shell, with its length positioned horizontally, meaning it is mounted on the wall laterally. In some actual products, to facilitate the drainage of condensate, the casing 1 is mounted horizontally on the wall at a small angle to the horizontal plane.

[0052] Reference Figure 3 and Figure 4 The main body 1000 also includes an indoor heat exchanger 2, which is disposed within the accommodating cavity V1. As described above, the indoor heat exchanger 2 is a loop in the refrigerant circuit, through which refrigerant flows for cooling or heating the air flowing from the surface of the indoor heat exchanger 2. In the wall-mounted air conditioner 10000, the indoor heat exchanger 2 typically extends along the length of the casing 1. For example, the indoor heat exchanger 2 is a two-fold or three-fold heat exchanger, where each fold of the indoor heat exchanger 2 is a plate-like structure extending along the length.

[0053] Reference Figure 3 and Figure 4 The main body 1000 also includes a base 3, which is located within the accommodating cavity V1. The base 3 serves as an internal mounting support structure for the main body 1000, and the indoor heat exchanger 2 can be mounted on the base 3. Specifically, a volute air duct V03 is formed on the base 3. After the indoor air enters the casing 1, it is guided by the volute air duct V03 to ensure that the resistance encountered by the indoor air when flowing through the indoor heat exchanger 2 is minimized.

[0054] Reference Figure 4The main body 1000 also includes a heat exchange fan 41, which is disposed within the volute duct V03. In this application, the heat exchange fan 41 can be a cross-flow fan, which has low noise and large air volume. Furthermore, the outlet air velocity of the cross-flow fan is more evenly distributed along its axial direction, which is beneficial for increasing the air delivery distance and range. Moreover, using a cross-flow fan, and having it positioned along the length of the main body 1000, facilitates the flow of the driven airflow through the entire indoor heat exchanger 2, ensuring a balanced heat exchange efficiency across all components of the indoor heat exchanger 2.

[0055] Reference Figure 4 The main body 1000 also includes a first motor 42, which is disposed within the accommodating cavity V1. The first motor 42 is used to drive the heat exchange fan 41 to rotate, so that the air inside the air conditioner exchanges heat with the indoor space.

[0056] The casing 1 is equipped with a heat exchange outlet 102 and a heat exchange inlet 101. When the heat exchange fan 41 is running, it draws indoor air into the casing 1 through the heat exchange inlet 101. After heat exchange with the indoor heat exchanger 2, the heat-exchanged air is sent to the room through the heat exchange outlet 102.

[0057] This allows for the regulation of indoor ambient temperature. The indoor heat exchanger 2 can function as an evaporator, so that the heat exchange outlet 102 provides cooling airflow toward the indoor space, or the indoor heat exchanger 2 can function as a condenser, so that the heat exchange outlet 102 provides heating airflow toward the indoor space.

[0058] In this application, the heat exchange air inlet 101 is located above the heat exchange air outlet 102 in the height direction of the main body 1000, which facilitates air intake from above and air exhaust from below. In this application, the height direction of the main body 1000 is the vertical direction.

[0059] Understandably, the main unit 1000 is usually installed on the wall, and to avoid interfering with people's daily lives, it is typically hung at a high position. By setting the main unit 1000 to blow out heat exchange air from below, the blown heat exchange air is less likely to be blocked by the roof or ground. This results in less resistance and energy loss during the air blowing process, a wider air delivery range, and allows the heat exchange air to flow throughout the entire indoor space as quickly as possible, thus improving heat exchange efficiency.

[0060] Reference Figure 1 and Figure 2 The heat exchange air inlet 101 is located above the heat exchange air outlet 102. The heat exchange air inlet 101 can take in air from above, which can avoid taking in air from the heat exchange air outlet 102 and prevent the heat exchange air from being blown out of the heat exchange air outlet 102 and directly sucked into the heat exchange air inlet 101, thus reducing the process of heat exchange air idling without participating in the indoor heat exchange.

[0061] In some specific embodiments, the heat exchange air inlet 101 is located at the top of the housing 1, that is, in an area that the user cannot see. Hiding the heat exchange air inlet 101 can improve the aesthetic appearance.

[0062] In some embodiments, the heat exchange outlet 102 is located directly in front of the housing 1, that is, the heat exchange outlet 102 blows air towards the front of the main body 1000. It can be understood that the side of the main body 1000 connected to the wall is usually referred to as the back or rear side, and the side opposite to the rear side is referred to as the front side. Therefore, when the heat exchange outlet 102 is located directly in front of the housing 1, the air outlet is away from the wall, the airflow resistance is small, and the air delivery range is wide.

[0063] In some other embodiments, the heat exchange outlet 102 is located on the front side of the housing 1 and near the bottom. It can also be said that the heat exchange outlet 102 is located at the lower front corner of the housing 1. In this case, the heat exchange air blown out by the heat exchange outlet 102 flows forward and downward at the same time. This allows the heat exchange air to sink and fall on people or objects on the ground after being delivered a certain distance, so that people or objects on the ground can be in a comfortable indoor environment as soon as possible.

[0064] In this application, the heat exchange fan 41 is located on the side of the indoor heat exchanger 2 away from the heat exchange air inlet 101. It can be understood that the heat exchange fan 41 is a power drive component that drives the indoor air to exchange heat with the indoor heat exchanger 2 by rotation, and it is also a power drive component for air supply.

[0065] By placing the heat exchange fan 41 on the side of the indoor heat exchanger 2 away from the heat exchange inlet 101, the aerodynamic force generated when the heat exchange fan 41 rotates can be evenly distributed. Part of it is distributed to the air inlet side, so that the air drawn in can overcome the wind resistance generated by the indoor heat exchanger 2 when it flows into the volute air duct V03. The other part is distributed to the air outlet side, so that the air after heat exchange can be transported a longer distance when it is blown out from the heat exchange outlet 102.

[0066] In this application, such as Figure 4 As shown, the first motor 42 is located at one end of the length of the main body 1000. This facilitates the installation and maintenance of the first motor 42, and the main body 1000 as a whole does not need to become excessively tall or thick due to the placement of the first motor 42. Here, the height direction of the main body 1000 is consistent with the vertical direction, and the thickness direction of the main body 1000 is consistent with the front-to-back direction.

[0067] In this application, the wall-mounted air conditioner 10000 also includes a second motor 5 (such as...). Figure 8 As shown), the second motor 5 is disposed in the accommodating cavity V1, and the second motor 5 is located at the other end of the length direction of the main body 1000.

[0068] In this way, the first motor 42 and the second motor 5 are located at both ends of the length direction of the main body 1000. On the one hand, the two motors are separated and far apart, resulting in less electromagnetic interference between them. On the other hand, the two motors are arranged at both ends of the length direction of the main body 1000, rather than in the thickness or height direction of the main body 1000, so that the main body 1000 of the wall-mounted air conditioner 10000 has a slender shape, and is thin and light.

[0069] Reference Figure 9 and Figure 10 The second motor 5 includes a stator 51 and a rotor 52, which together form the main body of the second motor 5. The stator 51 has wound coils that generate an alternating magnetic field when alternating current is applied, and the rotor 52 is induced and rotates in the alternating magnetic field.

[0070] The second motor 5 is an external rotor motor, with the rotor portion 52 arranged around the outside of the stator portion 51 in the radial direction. Choosing an external rotor motor for the second motor 5 not only simplifies its structure but also allows for a larger diameter due to the rotor portion 52's radial arrangement around the stator portion 51. This results in greater torque and makes it suitable for low-speed, high-torque, and direct-drive applications. In other words, when the second motor 5 outputs power, a speed reducer is not needed for torque amplification, saving space occupied by a speed reducer.

[0071] Reference Figure 9 and Figure 10 The second motor 5 also includes a motor housing 53, which can support and protect the main body of the second motor 5.

[0072] The motor housing 53 is fixedly connected to the rotor 52, and the motor housing 53 and the rotor 52 rotate synchronously. In this way, the rotor 52 can be fixed by the motor housing 53, which facilitates connection with external structures.

[0073] The second motor 5 also includes an output shaft 532, which is fixedly connected to the motor housing 53. One end of the output shaft 532 extends along the axial direction of the motor housing 53 toward the heat exchange fan 41, and the other end of the output shaft 532 extends into the stator portion 51. In other words, the main body of the second motor 5 is separated from the indoor heat exchanger 2 and the heat exchange fan 41 by a certain distance, thereby reducing the vibration transmitted from the operation of the second motor 5 to the indoor heat exchanger 2 and the heat exchange fan 41.

[0074] Reference Figure 8The wall-mounted air conditioner 10000 also includes: a fresh air fan 6, which is a centrifugal fan with axial air intake and radial air outlet. The fresh air fan 6 is located on the side of the heat exchange fan 41 away from the first motor 42. The fresh air fan 6 is located between the heat exchange fan 41 and the motor housing 53, and the fresh air fan 6 is connected to the output shaft 532 of the second motor 5.

[0075] Reference Figure 8 The wall-mounted air conditioner 10000 also includes an exhaust fan 7, which is a centrifugal fan with axial air intake and radial air exhaust. Along the length of the main body 1000, the exhaust fan 7 is located on the side of the fresh air fan 6 facing the second motor 5. The exhaust fan 7 is fitted radially outward of the motor housing 53 and is fixedly connected to the motor housing 53. The second motor 5 drives the fresh air fan 6 and the exhaust fan 7 to rotate synchronously during operation.

[0076] Both the fresh air fan 6 and the exhaust fan 7 are centrifugal fans, allowing for a more efficient arrangement of their airflow directions. Specifically, the fresh air fan 6 draws in air axially and exits radially, while the exhaust fan 7 draws in air axially and exits radially. The fresh air fan 6 and exhaust fan 7 draw in air from opposite ends, and then both are driven to exit radially. The flow paths of the fresh air and exhaust air do not need to overlap axially, and their paths do not need to intersect. This helps reduce the need for bends and turns in the fresh air and exhaust paths, reducing wind resistance and energy consumption, ensuring airflow, and lowering noise.

[0077] Reference Figures 5-8 The wall-mounted air conditioner 10000 also includes: a fresh air volute 8, a fresh air duct V01 formed inside the fresh air volute 8, a fresh air fan 6 installed inside the fresh air volute 8, and a fresh air inlet 801 and a fresh air outlet 802 formed on the fresh air volute 8. The rotation of the fresh air fan 6 allows outdoor air to enter the fresh air volute 8 through the fresh air inlet 801, and allows outdoor air entering the fresh air volute 8 to enter the room through the fresh air outlet 802.

[0078] Reference Figures 5-8 The wall-mounted air conditioner 10000 also includes: an exhaust volute 9, located on the side of the fresh air volute 8 facing the second motor 5; an exhaust duct V02 formed inside the exhaust volute 9; an exhaust fan 7 installed inside the exhaust volute 9; and an exhaust air inlet 901 and an exhaust air outlet 902 formed on the exhaust volute 9. Rotation of the exhaust fan 7 allows indoor air to enter the exhaust volute 9 through the exhaust air inlet 901 and allows indoor air entering the exhaust volute 9 to be exhausted to the outside through the exhaust air outlet 902.

[0079] In this application, a fresh air module is constructed by a fresh air volute 8 and a fresh air fan 6. The fresh air fan 6 is located within the fresh air duct V01 and drives airflow to be drawn in from the fresh air inlet 801 and exhausted into the room through the fresh air outlet 802. The operation of the fresh air fan 6 provides the power for the flow of fresh air. Therefore, by coordinating the fresh air duct V01 and the fresh air fan 6, when the indoor air is relatively polluted or the air quality is poor, the fresh air fan 6 can drive relatively fresh outdoor air into the indoor environment to improve the indoor airflow environment.

[0080] In this application, the exhaust volute 9 and the exhaust fan 7 constitute an exhaust module. The exhaust fan 7 is installed inside the exhaust duct V02 and is used to drive airflow to be drawn in from the exhaust inlet 901 and discharged from the room through the exhaust outlet 902. The operation of the exhaust fan 7 provides the power for the flow of polluted air.

[0081] The second motor 5, the fresh air fan 6, the exhaust fan 7, the fresh air volute 8, and the exhaust volute 9 constitute a two-way ventilation assembly, which is installed within the main body 1000. The two-way ventilation assembly can provide fresh air to the room and exhaust indoor air to the outside.

[0082] In some embodiments, the wall-mounted air conditioner 10000 is equipped with a two-way ventilation assembly, such as... Figure 8 As shown, the bidirectional ventilation assembly includes: a second motor 5, a fresh air fan 6, an exhaust fan 7, a fresh air volute 8, and an exhaust volute 9.

[0083] In this embodiment, the second motor 5 is an external rotor motor. The second motor 5 includes: a stator 51, a rotor 52, a motor housing 53, and an output shaft 532. The stator 51 has a coil wound on it. In the radial direction of the stator 51, the rotor 52 is arranged around the outside of the stator 51. The motor housing 53 is fixedly connected to the rotor 52. The output shaft 532 is fixedly connected to the motor housing 53. One end of the output shaft 532 extends along the axial direction of the motor housing 53 toward the side of the heat exchange fan 41, and the other end of the output shaft 532 extends into the stator 51 along the axial direction of the motor housing 53.

[0084] In this embodiment, the fresh air fan 6 is a centrifugal fan with axial air intake and radial air outlet. The fresh air fan 6 is located on the side of the heat exchange fan 41 away from the first motor 42. The fresh air fan 6 is located between the heat exchange fan 41 and the motor housing 53, and the fresh air fan 6 is connected to the output shaft 532 of the second motor 5.

[0085] In this embodiment, such as Figure 8 As shown, a fresh air duct V01 is formed inside the fresh air volute 8, and the fresh air fan 6 is installed inside the fresh air volute 8, as follows. Figure 6As shown, a fresh air inlet 801 and a fresh air outlet 802 are formed on the fresh air volute 8. The rotation of the fresh air fan 6 allows outdoor air to enter the fresh air volute 8 through the fresh air inlet 801, and allows outdoor air entering the fresh air volute 8 to enter the room through the fresh air outlet 802.

[0086] In this embodiment, such as Figure 8 As shown, the exhaust volute 9 is located on the side of the fresh air volute 8 facing the second motor 5. An exhaust duct V02 is formed inside the exhaust volute 9. An exhaust fan 7 is installed inside the exhaust volute 9. An exhaust inlet 901 and an exhaust outlet 902 are formed on the exhaust volute 9. The rotation of the exhaust fan 7 allows indoor air to enter the exhaust volute 9 from the exhaust inlet 901 and allows the indoor air entering the exhaust volute 9 to be exhausted to the outside from the exhaust outlet 902.

[0087] In this embodiment, the second motor 5 is located at the end of the main body 1000 along its length, and the axial direction of the second motor 5 is arranged along the length of the main body 1000. The second motor 5 serves as the common power source for both the fresh air module and the exhaust air module of the bidirectional ventilation assembly. To ensure the operation of both the fresh air module and the exhaust air module, the second motor 5 needs sufficient operating power to drive a sufficient airflow. Based on the power requirements of the second motor 5, the second motor 5 needs to be of a sufficiently large size.

[0088] In this embodiment, given that the dimensions of the second motor 5 are roughly determined, the arrangement of the fresh air module and the exhaust module considers how to utilize the space occupied by the second motor 5 while minimizing the amount of additional space required. Specifically, in this embodiment, both the fresh air fan 6 and the exhaust fan 7 are centrifugal fans connected to the same motor. This not only saves on the number of motors but also ensures that the two centrifugal fans are stacked along the axial direction of the second motor 5, that is, stacked along the length of the main body 1000.

[0089] It should be noted that when describing the internal structure of the bidirectional ventilation assembly, the terms "axial", "radial", and "circumferential" are all based on the axial, radial, and circumferential directions of the motor. That is, the direction parallel to the extension direction of the output shaft 532 of the second motor 5 is the axial direction, the direction perpendicular to the extension direction of the output shaft 532 is the radial direction, and the direction around the output shaft 532 is the circumferential direction.

[0090] In the above scheme, by adopting an external rotor motor for the second motor 5, and the exhaust fan 7 being fitted on the radially outer side of the motor housing 53, the second motor 5 is partially embedded in the exhaust fan 7 within the motor housing 53, and partially embedded in the fresh air fan 6 within the output shaft 532. This results in the second motor 5 almost overlapping with the exhaust fan 7 and the fresh air fan 6 in the length direction of the main body 1000, minimizing the axial portion of the exhaust fan 7 and the fresh air fan 6 outside the second motor 5. Consequently, the overall axial dimension of the bidirectional ventilation assembly is close to that of the second motor 5, thus making the length dimension of the main body 1000 controllable.

[0091] The main body of the second motor 5 is located inside the exhaust fan 7, rather than the fresh air fan 6, which allows for more airflow space in the fresh air duct V01, facilitating the intake of fresh air. Understandably, when the wall-mounted air conditioner 10000 is in cooling mode, the fresh air module draws in fresh air from outdoors, and the cooling capacity generated by the wall-mounted air conditioner 10000 can still remain indoors, resulting in minimal cooling loss.

[0092] In this embodiment, indoor air is exhausted outdoors through the exhaust module. By setting the exhaust air volume to be less than the fresh air volume, cooling loss can be reduced. Therefore, by squeezing the space of the exhaust duct V02 with the second motor 5, more space is left for the fresh air duct V01, which helps to ensure a larger fresh air volume.

[0093] Furthermore, because the second motor 5 uses an external rotor motor suitable for low-speed, high-torque, and direct-drive scenarios, a reducer is unnecessary. The exhaust fan 7 can be directly mounted radially outside the motor housing 53. This not only avoids increasing the overall axial dimension of the reducer but also avoids complicating the structural layout. Simply fixing the exhaust fan 7 to the motor housing 53 and connecting the fresh air fan 6 to the output shaft 532 of the second motor 5 allows the exhaust fan 7 and fresh air fan 6 to be coaxially stacked, enabling them to rotate synchronously with a small gap, eliminating the need for excessive spacing. This also ensures that the overall axial dimension of the bidirectional ventilation assembly is close to that of the second motor 5, and the length of the main body (1000mm) is controllable.

[0094] In this embodiment, placing the fresh air fan 6 on the side of the exhaust fan 7 facing the indoor heat exchanger 2 can reduce the loss of cold or heat in the room and improve the comfort of fresh air when it is blown into the room. Specifically, the fresh air module where the fresh air fan 6 is located is close to the indoor heat exchanger 2. The fresh air drawn in from the outside can absorb the cold or heat released by the indoor heat exchanger 2 before being blown into the room, so that the fresh air is as close as possible to the indoor temperature before being blown into the room.

[0095] In this way, when the wall-mounted air conditioner 10000 is cooling, the fresh air absorbs the cooling capacity of the indoor heat exchanger 2, lowering the temperature of the incoming fresh air and preventing hot outdoor air from being directly blown into the room. When the wall-mounted air conditioner 10000 is heating, the fresh air absorbs the heat of the indoor heat exchanger 2, raising the temperature of the incoming fresh air and preventing cold outdoor air from being directly blown into the room. Furthermore, the exhaust module containing the exhaust fan 7 is far from the indoor heat exchanger 2, resulting in less cooling or heating capacity absorbed from the indoor air after it is drawn in, and less cooling or heating capacity is lost when exhausted outdoors.

[0096] In this embodiment, the fresh air fan 6 is positioned on the side of the exhaust fan 7 facing the indoor heat exchanger 2. This reduces the amount of condensate entering the air duct when the indoor heat exchanger 2 is cooling. Specifically, the exhaust volute 9 of the exhaust module has an exhaust inlet 901 that draws air from the room, and the exhaust fan 7 draws air axially. Therefore, the exhaust inlet 901 is located on the side of the exhaust volute 9 away from the indoor heat exchanger 2. When there is condensate on one side of the indoor heat exchanger 2, the condensate is less likely to be drawn into the exhaust duct V02 by the exhaust module, reducing the risk of water accumulation and bacterial growth in the exhaust duct V02. Similarly, when the fresh air module draws air from the outside when the fresh air fan 6 is rotating, the condensate on the indoor heat exchanger 2 will not be drawn into the fresh air duct V01, further reducing the risk of water accumulation and bacterial growth in the fresh air duct V01.

[0097] In this embodiment, the exhaust fan 7 is located on the side of the fresh air fan 6 away from the indoor heat exchanger 2. Therefore, the exhaust fan 7, which needs to draw air from the room, consumes less energy for air intake. Specifically, when the wall-mounted air conditioner 10000 is cooling or heating, the heat exchange fan 41 operates to drive indoor air to flow through the indoor heat exchanger 2. The exhaust fan 7 is located at the end of the main body 1000, and its air intake end is far from the air intake end of the heat exchange fan 41. The exhaust fan 7 does not need to draw air from the air intake end of the heat exchange fan 41, thus reducing its air intake energy consumption. This ensures sufficient exhaust airflow and sufficient indoor air flow through the indoor heat exchanger 2 to obtain adequate heat exchange air, thereby keeping the overall energy consumption of the wall-mounted air conditioner 10000 from being too high.

[0098] In this embodiment, the fresh air module and exhaust module are effectively integrated, allowing both modules to utilize their respective structural and spatial characteristics to achieve a flattened design. This not only reduces the overall size and weight of the bidirectional ventilation component, making it lighter and more compact, but also ensures that the air ducts do not interfere with each other. The bidirectional ventilation component is located at one end of the length of the main body 1000. Compared to the main body without the bidirectional heat exchange component, only the lateral length is increased. The height and thickness of the main body 1000 can remain largely unchanged or only slightly altered, resulting in a slim and lightweight design. When mounted on the wall, it will not obtrusively affect the indoor space layout, and its excessive weight will not make it difficult to secure the wall-mounted air conditioner 10000, reducing the risk of it falling off the wall. The wall-mounted air conditioner 10000 remains a slim and lightweight model, making it aesthetically pleasing when mounted on the wall, with manageable weight and safe operation.

[0099] In this application, the fresh air inlet 801 is located below the main body 1000 in terms of height. It is understood that the fresh air inlet 801 needs to be connected to a duct to introduce outdoor air; this duct is referred to here as the fresh air inlet pipe 141 (e.g., Figure 2 (As shown). The fresh air inlet pipe 141 can be a part of the wall-mounted air conditioner 10000, or it can be a fresh air inlet pipe 141 that the user configures separately after purchasing the wall-mounted air conditioner 10000.

[0100] By positioning the fresh air inlet 801 at the bottom of the main body 1000, the fresh air inlet pipe 141 can be connected to the fresh air inlet 801 from below. The connection extends roughly in the vertical direction, rather than in the front-back direction, which would make the main body 1000 too thick, thus allowing the wall-mounted air conditioner 10000 to maintain a slim and lightweight shape. Furthermore, the portion of the fresh air volute 8 that houses the fresh air fan 6 is circular. Since the axis of the fresh air volute 8 extends along the length of the main body 1000, there is free space on both the front and rear sides of the bottom of this circle. This space can be used to position the fresh air inlet 801 to connect to the fresh air inlet pipe 141. Thus, the connection between the fresh air inlet pipe 141 and the fresh air inlet 801 can be placed in this free space without occupying additional space, thereby controlling the height of the main body 1000.

[0101] In this application, the exhaust outlet 902 is located below the main body 1000 in the height direction. It is understood that the exhaust outlet 902 needs to be connected to a duct to guide indoor air to the outside; this duct is referred to here as the exhaust outlet pipe 142 (e.g., Figure 2 (As shown). The exhaust pipe 142 can be a part of the wall-mounted air conditioner 10000, or it can be an exhaust pipe 142 that the user configures separately after purchasing the wall-mounted air conditioner 10000.

[0102] The exhaust outlet 902 is positioned below the main body 1000, allowing the exhaust pipe 142 to connect to it from below. The connection extends roughly vertically rather than front-to-back, preventing the main body 1000 from becoming too thick. This allows the wall-mounted air conditioner 10000 to maintain a slim and lightweight design. Furthermore, the portion of the exhaust volute 9 housing the exhaust fan 7 is circular. Since the axis of the exhaust volute 9 extends along the length of the main body 1000, this circular shape provides ample space on both the front and rear sides of the bottom. Moreover, given the axial air intake and radial air exhaust characteristics of the exhaust fan 7, the volute tongue of the exhaust volute 9 can be arranged roughly vertically and placed within the aforementioned front or rear ample space.

[0103] An exhaust outlet 902 is provided here to connect to the exhaust pipe 142, so that the connection between the exhaust pipe 142 and the exhaust outlet 902 can be placed in this empty space without occupying additional space, thus controlling the height of the main body 1000.

[0104] In some specific embodiments, such as Figure 2 As shown, the wall-mounted air conditioner 10000 also includes: a fresh air inlet pipe 141 connected to the fresh air inlet 801 and an exhaust outlet pipe 142 connected to the exhaust outlet 902. A pipe clearance opening 104 is provided on the bottom wall of the casing 1. The fresh air inlet pipe 141 and the exhaust outlet pipe 142 pass through the pipe clearance opening 104 and extend from the bottom of the main body 1000. The fresh air inlet pipe 141 and the exhaust outlet pipe 142 are two independent pipes, which helps to separate the fresh air flow path and the exhaust air flow path, preventing them from intersecting and reducing the risk of air leakage caused by cross-flow.

[0105] A pipe avoidance opening 104 is provided on the bottom wall of the main body 1000 to facilitate the installation of the aforementioned pipes and ensure the aesthetic appearance of the main body 1000. The fresh air inlet pipe 141 and the exhaust outlet pipe 142 are connected from the bottom of the main body 1000, which does not affect the upper area of ​​the wall-mounted air conditioner 10000 after it is hung on the indoor wall. That is, the fresh air inlet pipe 141 and the exhaust outlet pipe 142 will not interfere with the rear wall or the upper ceiling, making the installation of the wall-mounted air conditioner 10000 more convenient and quick.

[0106] Furthermore, the fresh air inlet 801 is oriented upwards. Specifically, the air inlet direction of the fresh air inlet 801 is perpendicular to the length direction of the main body 1000. This ensures that when a bidirectional ventilation assembly is installed at the end of the wall-mounted air conditioner 10000, the fresh air inlet pipe 141 connected to the fresh air inlet 801 will not cause the wall-mounted air conditioner 10000 to be excessively elongated. Even further, the fresh air inlet 801 is located at the bottom of the main body 1000 and near the rear, facilitating the installation of the fresh air inlet pipe 141 close to the wall after it is connected to the fresh air inlet 801.

[0107] Furthermore, the exhaust outlet 902 is oriented downwards. Specifically, the exhaust outlet 902 is perpendicular to the length of the main body 1000. This ensures that when the bidirectional ventilation assembly is installed at the end of the wall-mounted air conditioner 10000, the exhaust outlet pipe 142 will not cause the wall-mounted air conditioner 10000 to be excessively elongated when connected to the exhaust outlet 902. Even further, the exhaust outlet 902 is located at the bottom of the main body 1000 and near the rear, facilitating the installation of the exhaust outlet pipe 142 close to the wall after it is connected to the exhaust outlet 902.

[0108] Of course, this application may not be limited to this, such as... Figure 1 As shown, the duct clearance opening 104 can also be located on the side wall of the housing 1. The fresh air inlet duct 141 connects to the fresh air inlet 801 from below the main body 1000, bends and extends laterally, then extends out from the duct clearance opening 104 on the side wall of the housing 1, and then extends outdoors. The exhaust outlet duct 142 connects to the exhaust outlet 902 from below the main body 1000, bends and extends laterally, then extends out from the duct clearance opening 104 on the side wall of the housing 1, and then extends outdoors.

[0109] It is understandable that the main body 1000 is usually equipped with a refrigerant pipe and a drain pipe at one end in the length direction. The refrigerant pipe is used to connect the indoor heat exchanger 2 to the outdoor compressor and outdoor heat exchanger, and the drain pipe is used to drain the condensate generated inside the wall-mounted air conditioner 10000.

[0110] The duct clearance opening 104 is set on the side wall of the casing 1. Then, the fresh air inlet pipe 141 and the exhaust outlet pipe 142 are laid horizontally and led out, making it easy to place at least one of the fresh air inlet pipe 141 and the exhaust outlet pipe 142 alongside the drain pipe and refrigerant pipe. In this way, the multiple pipes are wrapped with an external bundle or strap, so that the multiple pipes appear as a single pipe. This reduces the number of connecting pipes on the wall-mounted air conditioner 10000 after installation, resulting in a simple appearance. This not only facilitates assembly but also avoids the risk of multiple pipes being bumped or knocked over.

[0111] In some embodiments, such as Figure 8 and Figure 11 As shown, the exhaust fan 7 forms a receiving groove V07 at the center in the radial direction, and at least a portion of the stator portion 51, at least a portion of the rotor portion 52, and at least a portion of the motor housing 53 of the second motor 5 are housed in the receiving groove V07.

[0112] Specifically, the hub of the exhaust fan 7 forms a receiving groove V07. At this time, the main body of the second motor 5 (i.e., the stator 51 and the rotor 52) and the motor housing 53 can be placed in the center of the exhaust fan 7, which will not obstruct the flow of exhaust air and can make full use of the hub space of the exhaust fan 7, reducing the space occupied by the second motor 5 on the outside.

[0113] Furthermore, the hub of the exhaust fan 7 has a protective function on the outside of the second motor 5, and it can also make the center of gravity of the exhaust fan 7 as close as possible to the center of the rotor 52. As a result, the bending moment generated by the exhaust fan 7 on the second motor 7 is small, the sway of the exhaust fan 7 is small when it rotates, and the exhaust fan 7 operates stably with low energy consumption.

[0114] In some embodiments, such as Figure 1 As shown, a housing air outlet 105 is provided on the housing 1. The housing air outlet 105 is set to correspond to the fresh air outlet 802 of the fresh air volute 8, so that the fresh air discharged from the fresh air outlet 802 is discharged from the housing air outlet 105.

[0115] In some specific embodiments, the fresh air outlet 802 is located at the front of the main body 1000, and the casing outlet 105 can be correspondingly located on the front side of the casing 1, which facilitates the output of fresh air from the front of the main body 1000. When the wall-mounted air conditioner 10000 is installed on the wall, especially at a high position on the wall, there are few obstructions in front, and the air outlet from the front can ensure a large air supply area for fresh air.

[0116] In some other specific embodiments, the fresh air outlet 802 is located at the top of the main body 1000, and the housing outlet 105 can be correspondingly set on the top wall of the housing 1. In this way, the fresh air is sent towards the roof, and the roof can be used to guide the flow direction of the fresh air, so that the fresh air flows along the roof and expands the air supply area.

[0117] Furthermore, since the heat exchange air inlet 101 is located above the heat exchange air outlet 102, and the position of the heat exchange air inlet 101 on the casing 1 is relatively high, some of the fresh air blown out from the top of the fresh air outlet 802 can be drawn back into the accommodating cavity V1 through the heat exchange air inlet 101 and flow through the indoor heat exchanger 2.

[0118] This setup facilitates the rapid arrival of fresh air at room temperature, enhancing comfort when the fresh air is introduced. It also promotes thorough mixing of the fresh air with the indoor air flowing through the indoor heat exchanger 2, ensuring that the air blown into the room from the heat exchange outlet 102 is generally fresh and improving the uniformity of fresh air distribution within the room.

[0119] In some other embodiments, the fresh air outlet 802 is located below the main body 1000 to guide fresh air forward and downward into the room. Correspondingly, the housing outlet 105 can be located below the housing 1.

[0120] Since the heat exchange air inlet 101 is located above the heat exchange air outlet 102, and the heat exchange air outlet 102 is relatively low on the casing 1, the fresh air outlet 802 blows fresh air from below, making the air outlet area of ​​the casing air outlet 105 close to or even partially overlap with the air outlet area of ​​the heat exchange air outlet 102. This is beneficial for the fresh air to mix with the indoor air after heat exchange, improving the uniformity of the fresh air after mixing in the indoor air, and allowing the fresh air to absorb the cold or heat of the indoor air after heat exchange, making the fresh air temperature approach the indoor temperature and improving the comfort of airflow.

[0121] Furthermore, the air outlet 802 is in the opposite direction to the air inlet 101, so fresh air will not be drawn into the air inlet 101. This reduces the proportion of fresh air intake at the air inlet 101, resulting in a larger total air volume output from the wall-mounted air conditioner 10000 and improving the overall air circulation efficiency of the indoor air.

[0122] Furthermore, the fresh air outlet 802 is located below the main body 1000, close to the people's activity space, making it convenient for people to observe the fresh air supply. This achieves a visual effect of fresh air supply, which helps to improve people's experience.

[0123] Specifically, when the fresh air outlet 802 is located below the main body 1000, it is usually located on the front side below the main body 1000. This allows the fresh air to flow forward and downward, ensuring that the fresh air can reach the ground and also that the fresh air can reach a sufficiently long distance.

[0124] Optionally, such as Figure 1 and Figure 3 As shown, the housing 1 has an air guide grille 16 at the housing air outlet 105 to adjust the direction of fresh air output.

[0125] In some embodiments, such as Figure 3 As shown, the exhaust air inlet 901 is formed on the exhaust volute 9, and the axial direction of the exhaust air inlet 901 is arranged along the length direction of the main body 1000. That is to say, the exhaust air inlet 901 is directly opposite the axial air intake end of the exhaust fan 7, so that the air resistance of the exhaust fan 7 entering through the exhaust air inlet 901 is small, which helps to ensure the exhaust air volume. When exhaust air intake is relatively easy, a smaller exhaust fan 7 can be selected to further reduce the size of the bidirectional ventilation assembly.

[0126] In some embodiments, such as Figure 1 As shown, the housing 1 has a housing air inlet 103 at the end where the second motor 5 is located, and the housing air inlet 103 is located at the top of the main body 1000. The housing air inlet 103 and the exhaust air inlet 901 form a first ventilation duct V04. The exhaust fan 7 rotates and drives the indoor air to enter the first ventilation duct V04 through the housing air inlet 103, and causes the indoor air to enter the exhaust volute 9 through the exhaust air inlet 901.

[0127] In other words, there is no need for a physical duct connecting the air inlet 103 and the exhaust air inlet 901; airflow is drawn in from the top solely by wind pressure. The air inlet 103 is located at the top of the housing 1, in an area not visible to the user. Concealing the air inlet 103 improves the aesthetics of the design.

[0128] In some embodiments, the housing 1 has a housing air inlet 103 at the end where the second motor 5 is located, and the housing air inlet 103 is located on the side of the main body 1000. The exhaust fan 7 rotates and drives indoor air into the interior of the housing 1 through the housing air inlet 103, and causes the indoor air to enter the exhaust volute 9 through the exhaust air inlet 901. That is to say, there is no need for a physical pipe to connect the housing air inlet 103 and the exhaust air inlet 901, and the housing air inlet 103 is located on the side of the main body 1000, which can be directly opposite the exhaust air inlet 901.

[0129] This shortens the air intake path from the housing air inlet 103 to the exhaust air inlet 901. Furthermore, since the air intake path is largely aligned with the axial direction of the exhaust fan 7, indoor air flowing towards the exhaust fan 7 along this path does not require multiple changes in airflow direction. This further reduces the air resistance at the exhaust air intake, ensuring sufficient exhaust airflow.

[0130] In some embodiments, the exhaust fan 7 may be made of plastic, thus being lightweight and low-cost. However, this application is not limited to this; the exhaust fan 7 may also be made of resin, metal, or other materials.

[0131] In some embodiments, the fresh air fan 6 may be made of plastic, thus being lightweight and low-cost. However, this application is not limited to this; the fresh air fan 6 may also be made of resin, metal, or other materials.

[0132] Similarly, the exhaust volute 9 can be made of plastic, thus being lightweight and low-cost. Optionally, the exhaust volute 9 can be an injection-molded part. Of course, the present application is not limited to this; the exhaust volute 9 can also be made of metal, etc.

[0133] The fresh air volute 8 can be made of plastic, thus being lightweight and low-cost. Optionally, the fresh air volute 8 can be injection molded. Of course, the present application is not limited to this; the fresh air volute 8 can also be made of metal, etc.

[0134] In some embodiments, such as Figure 11 and Figure 14 As shown, the exhaust fan 7 includes an exhaust wheel 71 and exhaust blades 72. The exhaust blades 72 are located on the outer edge of the exhaust wheel 71 and extend along the axial direction of the exhaust wheel 71 in a direction away from the fresh air fan 6.

[0135] The exhaust fan 7 also includes a protrusion 74 on the exhaust wheel 71. The center of the protrusion 74 is located on the axis of the exhaust fan 7, and the protrusion 74 extends relative to the exhaust wheel 71 toward the fresh air fan 6, so that the side of the protrusion 74 near the second motor 5 forms a receiving groove VO7 for the second motor 5, and at least a part of the stator part 51 and at least a part of the rotor part 52 are accommodated in the receiving groove VO7.

[0136] Reference Figure 5 and Figure 15 The fresh air volute 8 includes a first volute 81 and a second volute 82. The first volute 81 is located on the side of the exhaust volute 9 facing the heat exchange fan 41 and is detachably connected to the exhaust volute 9. The second volute 82 is located on the side of the first volute 81 facing the heat exchange fan 41 and is detachably connected to the first volute 81. The first volute 81 is located between the exhaust volute 9 and the second volute 82. A volute cavity V011 is formed between the second volute 82 and the first volute 81, and the fresh air fan 6 is located within the volute cavity V011.

[0137] Reference Figure 14 The first volute 81 includes a first volute end plate 811 and a first volute surrounding plate 812, with the first volute surrounding plate 812 extending along the edge of the first volute end plate 811 toward the heat exchange fan 41.

[0138] The first volute end plate 811 has a central portion forming a recess 813 facing into the fresh air fan 6, and a perforation 814 is provided at the center of the recess 813. At least a portion of the protrusion 74 is located within the recess 813, and the output shaft 532 is connected to the fresh air fan 6 through the perforation 814.

[0139] In this application, the fresh air volute 8 is divided into at least a first volute 81 and a second volute 82 along the axial direction and processed separately. This reduces the difficulty of manufacturing and assembly, and the separate manufacturing of such a complex housing facilitates quality control. The first volute 81 is detachably connected to the exhaust volute 9, and the second volute 82 is detachably connected to the first volute 81, which facilitates assembly and subsequent adjustment and maintenance.

[0140] A protrusion 74 is provided at the center of the exhaust fan disc 71, and a recess 813 is formed at the center of the first volute end plate 811. On the one hand, the hub of the exhaust fan 7 forms the protrusion 74 to accommodate the second motor 5, and the protrusion 74 can improve the structural strength of the exhaust fan 7. On the other hand, the main body of the second motor 5, by being assembled in the protrusion 74, occupies more of the exhaust air duct V02 and less of the fresh air duct V01, which matches the design that the fresh air volume is greater than the exhaust air volume. Only the output shaft 532 passes through the first volute end plate 811, which helps to seal the air, reduces the probability of fresh air and exhaust air flowing between each other, and reduces airflow disturbance.

[0141] In this application, to ensure the safety and reliability of the wall-mounted air conditioner 10000, the external dimensions of the main body 1000 will be strictly controlled. This not only minimizes the gaps between internal parts and prevents them from loosening, but also allows for shorter air ducts and a smaller casing 1, thereby reducing the overall weight of the main body 1000, making it safer to mount on the wall, and giving it a slimmer appearance.

[0142] In some embodiments, refer to Figure 8 The exhaust volute 9 and the fresh air volute 8 are connected, sharing a first volute end plate 811, which separates the fresh air duct V01 and the exhaust air duct V02. This arrangement eliminates the need for a gap between the exhaust volute 9 and the fresh air volute 8, further reducing the axial dimension of the bidirectional ventilation assembly and minimizing its space occupation within the wall-mounted air conditioner 10000, thus contributing to the overall slim and lightweight design of the wall-mounted air conditioner 10000.

[0143] Optionally, the first volute end plate 811 is a single-layer plate, which simplifies the structure and helps to reduce the overall axial dimension.

[0144] In some embodiments, refer to Figure 8 , Figure 11 and Figure 14 The exhaust fan 7 includes an exhaust wheel 71 and exhaust blades 72. The exhaust wheel 71 is coaxially mounted with the second motor 5 and connected to the motor housing 53 of the second motor 5. Multiple exhaust blades 72 are mounted on the exhaust wheel 71 and extend only in a direction away from the fresh air fan 6. These multiple exhaust blades 72 are arranged circumferentially on the exhaust wheel 71. In other words, the exhaust fan 7 includes a single layer of centrifugal blades, thus achieving a simple structure and low cost while meeting the requirements for small air volumes. Furthermore, the blade cylinder formed by the circumferential arrangement of the exhaust blades 72 is open at the axial air intake end, facilitating airflow intake, reducing suction resistance, and ensuring sufficient exhaust airflow.

[0145] In some specific embodiments, reference is made to Figure 5 , Figure 8 and Figure 15 The second volute 82 includes a second volute half 821 and a fan cover 822. The second volute half 821 is located on the side of the first volute 81 facing the heat exchange fan 41 and is detachably connected to the first volute 81. The second volute half 821 has an axial ventilation port 8211 at its center in the radial direction. A volute cavity V011 is formed between the second volute half 821 and the first volute 81. The fresh air fan 6 is located in the volute cavity V011, and the axial air inlet end of the fresh air fan 6 is arranged facing the axial ventilation port 8211. The second volute half 821 and the first volute 81 enclose a fresh air outlet 802.

[0146] The fan cover 822 is located on the side of the second volute half 821 facing the heat exchange fan 41 and is detachably connected to the second volute half 821. (Refer to...) Figure 8 The cavity enclosed by the fan cover 822 and the second volute half 821 is the fresh air cavity V012, and the fresh air inlet 801 is enclosed by the fan cover 822 and the second volute half 821.

[0147] With this configuration, a fresh air cavity V012 is formed at the air inlet of the fresh air fan 6. The fresh air cavity V012 can cover the axial air inlet of the fresh air fan 6. The fresh air cavity V012 can contain air, allowing air to enter the fresh air fan 6 vertically along the axial direction from the fresh air cavity V012, thereby improving the air intake efficiency of the fresh air fan 6 and reducing air intake loss.

[0148] The fan shroud 822 is located on the side of the second volute half 821 facing the indoor heat exchanger 2, thus separating the volute cavity V011 from the indoor heat exchanger 2. When the indoor heat exchanger 2 is cooling, it absorbs heat from the fresh air cavity V012, gradually lowering the fresh air temperature. Because of the separation provided by the fan shroud 822, the indoor heat exchanger 2 is farther from the volute cavity V011, reducing the cooling capacity of the indoor heat exchanger 2 on the air inside the volute cavity V011, making it less likely for the air inside the volute cavity V011 to become supercooled and condensate.

[0149] In this way, even if the incoming fresh air is cooled, it will not become too cold and produce condensation. Furthermore, even if condensation occurs in the fresh air cavity V012, the condensate tends to remain within V012 and is less likely to enter the volute cavity V011 and be blown into the room, thus preventing water from being blown out of the fresh air module. When the indoor heat exchanger 2 is heating, it absorbs the cold air from the fresh air cavity V012, gradually increasing the fresh air temperature. The heated air then enters the volute cavity V011 and mixes thoroughly, resulting in warmer air being blown out of the fresh air module.

[0150] In some embodiments, refer to Figure 3 The wall-mounted air conditioner 10000 also includes: purification component 11, see reference. Figure 8 The purification component 11 is installed inside the fresh air duct V01, which purifies the fresh air blown into the room and improves the cleanliness of the indoor air.

[0151] Specifically, the purification component 11 is installed inside the fresh air cavity V012, that is, the purification component 11 is located at the axial air intake end of the fresh air fan 6. The rotation of the fresh air fan 6 can cause outdoor air to enter the fresh air volute 8 from the fresh air inlet 801, and can also cause the outdoor air entering the fresh air volute 8 to be blown through the purification component 11, and then enter the room from the fresh air outlet 802.

[0152] In this way, the fresh airflow can blow almost vertically over the purification component 11, further reducing the consumption of fresh air intake and thus increasing the fresh air volume. Moreover, when the indoor heat exchanger 2 is in cooling mode, causing condensation to form in the fresh air, the condensation can remain on the purification component 11 as the air flows through it, further preventing water from being blown out when the fresh air module exits.

[0153] Furthermore, the purification component 11 is connected to the second volute 82, which facilitates the assembly of the purification component 11 and prevents it from interfering with the fresh air fan 6.

[0154] Optionally, such as Figure 15 As shown, the purification component 11 includes a filter screen 111, which covers the axial ventilation port 8211. The filter screen 111 covers the entire air inlet of the fresh air fan 6, providing a large coverage area and excellent filtration effect. The filter screen 111 helps ensure sufficient contact area with the flowing air, and is lightweight with low noise. Optionally, the filter screen 111 is a HEPA filter, thus possessing strong adsorption capacity and excellent dust filtration effect. The rotation of the fresh air fan 6 allows outdoor air to enter the fresh air chamber V012 from the fresh air inlet 801, and allows the outdoor air entering the fresh air chamber V012 to pass through the filter screen 111, then through the axial ventilation port 8211 into the volute chamber V011, and finally into the room from the fresh air outlet 802.

[0155] In some embodiments, the air intake direction of the fresh air inlet 801 is parallel to the filter screen 111, and the air intake direction of the axial vent 8211 is perpendicular to the filter screen 111. After outdoor air enters the fresh air chamber V012 through the fresh air inlet 801, it briefly stays on the side of the filter screen 111 facing the heat exchange fan 41, and then passes through the filter screen 111 of the purification component 11 before reaching the fresh air fan 6 through the axial vent 8211. When the fresh air fan 6 rotates, it generates vortices, thereby allowing the air to further enter the room through the fresh air outlet 802.

[0156] Alternatively, the filter 111 can be plate-shaped, so that the filter 111 is relatively thin and will not take up too much space when placed in the two-way ventilation assembly.

[0157] Optionally, the filter screen 111 is square, which facilitates the positioning and installation of the filter screen 111.

[0158] Furthermore, the filter screen 111 is a square mesh, with its side length exceeding the diameter of the axial vent 8211. The square mesh facilitates positioning during installation, prevents wobbling after installation, and is easy to process with minimal waste. By ensuring the side length of the filter screen 111 is greater than the diameter of the axial vent 8211, all fresh air entering the axial vent 8211 can pass through the filter screen 111, resulting in high filtration cleanliness.

[0159] In some embodiments, the fresh air volute 8 is also provided with an installation port 803, and the purification component 11 is detachably assembled into the installation port 803. This facilitates the removal of the purification component 11 when it is damaged or saturated, making it convenient for maintenance or replacement.

[0160] Specifically, such as Figure 15 As shown, the mounting port 803 is formed between the fan cover 822 and the second volute half 821. The purification component 11 can be detachably assembled into the fresh air cavity V012 through the mounting port 803. This allows the mounting port 803 to be set to a larger size, facilitating the installation of larger purification components 11. When the mounting port 803 is larger, it is formed by the fan cover 822 and the second volute half 821, with open half-openings on both sides, facilitating processing or demolding and resulting in a low scrap rate.

[0161] Specifically, such as Figure 3 As shown, in the front-rear direction of the main body, the mounting port 803 is located on the front side of the main body 1000. When the purification component 11 is disassembled, it can be free from interference from the pipes connected to the fresh air inlet 801 and the exhaust outlet 902, thus facilitating disassembly. Optionally, the front side of the housing 1 is provided with an openable panel (not shown in the figure). When the panel is opened or rotated upward, the mounting port 803 can be exposed, facilitating the disassembly of the purification component 11.

[0162] It is also possible that in some designs, the mounting port 803 will be located at the bottom of the main body 1000.

[0163] In some embodiments, such as Figure 6 As shown, a purification air inlet 804 for connecting to the indoor environment is formed on the fresh air volute 8. The rotation of the fresh air fan 6 allows indoor air to enter the fresh air volute 8 through the purification air inlet 804 for purification by the purification component 11, and allows indoor air entering the fresh air volute 8 to enter the room through the fresh air outlet 802. In this way, indoor air can enter the fresh air duct V01 from the purification air inlet 804, be purified, and then enter the room through the fresh air outlet 802.

[0164] This design allows for air circulation and purification when indoor air is polluted. This eliminates the need to introduce fresh outdoor air, thus improving air quality. Because no fresh outdoor air is introduced, the purification process avoids sudden drafts of unheated cold or hot outdoor air, preventing discomfort caused by rapid temperature changes.

[0165] Specifically, such as Figure 6As shown, the purification air inlet 804 is located at the bottom of the fresh air volute 8 and faces downwards. It can be understood that the fresh air inlet 801 is located below the main body 1000, and both the fresh air inlet 801 and the purification air inlet 804 are located at the bottom of the fresh air volute 8 and face downwards, which facilitates processing and shaping. Furthermore, in use, only one of them needs to be opened. Placing both the fresh air inlet 801 and the purification air inlet 804 at the bottom of the fresh air volute 8 allows for centralized switching to select one inlet to open, reducing the number of switches required.

[0166] Furthermore, such as Figure 6 As shown, the air intake direction of the purification air inlet 804 is perpendicular to the length direction of the main body 1000. It can be understood that by making the air intake direction of the purification air inlet 804 perpendicular to the length direction of the main body 1000, the air intake area of ​​the purification air inlet 804 is farther from the exhaust air inlet 901, avoiding excessive air intake energy consumption caused by the purification air inlet 804 being too close to the exhaust air inlet 901. Furthermore, the different directions of the purification air inlet 804 and the exhaust air inlet 901 help to expand the negative pressure area, facilitating the inflow of a large amount of indoor air into the negative pressure area and ensuring the air volume of exhaust and fresh indoor air.

[0167] In some embodiments, such as Figure 5 and Figure 8 As shown, the exhaust volute 9 includes an air guide ring 91, which is a circular tube. The diameter of the air guide ring 91 gradually decreases in the direction towards the heat exchange exhaust fan 7. The area enclosed by the air guide ring 91 forms the exhaust air inlet 901. The air guide ring 91 can effectively collect the dispersed airflow and converge it into a more concentrated airflow, which is then sent into the exhaust fan 7, making the air intake smoother and more efficient, and increasing the air volume of the exhaust fan 7.

[0168] Furthermore, the air guide ring 91, through its rationally designed shape and angle, allows airflow to enter the exhaust blades 72 of the exhaust fan 7 at the optimal angle, improving the working efficiency of the exhaust fan 7. When unstable airflow fluctuations are drawn in, the air guide ring 91 can stabilize the airflow, reducing turbulence and fluctuations, allowing the exhaust fan 7 to operate more smoothly. This can reduce noise and vibration, and extend the service life of the exhaust fan 7.

[0169] Specifically, such as Figure 8 As shown, the exhaust fan 7 includes an exhaust wheel 71 and exhaust blades 72. The exhaust wheel 71 is connected to the motor housing 53 of the second motor 5. The exhaust blades 72 are connected to the side of the exhaust wheel 71 away from the heat exchange fan 41. The exhaust blades 72 are multiple and arranged circumferentially.

[0170] like Figure 8 and Figure 11As shown, the edge of the exhaust blade 72 furthest from the exhaust wheel 71 is the blade side edge 721. The distance between the part of the blade side edge 721 near the second motor 5 and the exhaust wheel 71 decreases, and all exhaust blades 72 form a side edge recess 723 at the point where the distance of the blade side edge 721 decreases. The end of the air guide ring 91 is located within the side edge recess 723.

[0171] In other words, the exhaust blades 72 of the exhaust fan 7 are concave blades, and both the air guide ring 91 and the concave blades are recessed towards the fresh air fan 6. The air guide ring 91 partially enters the side edge recess 723 formed by the concave blades. With this configuration, the air guide ring 91 and the exhaust fan 7 can partially overlap in the axial direction, and there is no need to increase the axial dimension of the exhaust volute 9 while setting the air guide ring 91.

[0172] In some embodiments, such as Figure 4 As shown, the indoor heat exchanger 2 and the heat exchange fan 41 are mounted on the base 3. Each of the two ends of the base 3 is provided with an end plate 31. The two ends of the indoor heat exchanger 2 are mounted on the two end plates 31, and the two ends of the heat exchange fan 41 are mounted on the two end plates 31.

[0173] In some embodiments, the housing air inlet 103 is located on the top wall of the main body 1000. Since the wall-mounted air conditioner 10000 is hung high on the wall, the housing air inlet 103 located on the top wall of the main body 1000 is not easily seen by people, thus maintaining the aesthetic appearance of the main body 1000.

[0174] In some embodiments, such as Figure 8 , Figures 12-14 and Figures 16-19 As shown, the fresh air fan 6 may include a fresh air impeller 61, which is coaxially arranged with the second motor 5. The second motor 5 drives the fresh air fan 6 by rotating the fresh air impeller 61. Specifically, the fresh air impeller 61 is connected to the output shaft 532 of the second motor 5. When the output shaft 532 and the motor housing 53 rotate synchronously with the rotor 52, they can drive the fresh air fan 6 to rotate synchronously.

[0175] In some embodiments, such as Figure 8 , Figures 12-14 and Figures 16-19 As shown, the fresh air fan 6 may also include a fresh air blade 62, which is connected to the fresh air impeller 61 and extends along the axial direction of the fresh air impeller 61.

[0176] In some embodiments, such as Figure 8 , Figures 12-14 and Figures 17-19As shown, the fresh air blade 62 may include a first fresh air blade 621, which extends from the fresh air impeller 61 toward a direction away from the exhaust fan 7. In other words, the first fresh air blade 621 extends from the fresh air impeller 61 toward a direction closer to the heat exchange fan 41. When the fresh air fan 6 rotates, the first fresh air blade 621 pushes the airflow, thereby generating a vortex at the first fresh air blade 621. The blade tube formed by the circumferential arrangement of the first fresh air blades 621 is open at the axial air intake end, which facilitates airflow intake, reduces airflow resistance, and ensures the intake volume of fresh air.

[0177] In some embodiments, such as Figure 8 , Figure 12 , Figure 14 and Figures 16-19 As shown, the fresh air blade 62 may include a second fresh air blade 622, which extends from the fresh air impeller 61 toward the direction closer to the exhaust fan 7. In other words, the second fresh air blade 622 extends from the fresh air impeller 61 toward the direction away from the heat exchange fan 41. Axially, the first fresh air blade 621 and the second fresh air blade 622 extend in opposite directions to each other. When the fresh air fan 6 rotates, the second fresh air blade 622 pushes the airflow, thereby generating vortices at the second fresh air blade 622. The first fresh air blade 621 and the second fresh air blade 622 constitute a double-layer centrifugal blade. This double-layer centrifugal blade structure design helps increase the overall structural strength of the centrifugal fan while meeting high airflow requirements.

[0178] Along the axial direction of the fresh air fan 6, the first fresh air blade 621 is located between the second fresh air blade 622 and the fresh air inlet 801. After outdoor air enters the fresh air volute 8 through the fresh air inlet 801, it first reaches the first fresh air blade 621 and then the second fresh air blade 622. Thus, when the fresh air fan 6 rotates, a vortex is first generated at the first fresh air blade 621, and then a vortex is generated at the second fresh air blade 622.

[0179] By installing fresh air blades 62 on both sides of the fresh air impeller 61, the fresh air impeller 61 is positioned far from the inner wall of the fresh air volute 8. When the second motor 5 drives the fresh air fan 6 to rotate, the first fresh air blade 621 pushes the air, generating vortices around it. The second fresh air blade 622 pushes the air, generating vortices around it. The vortices generated at the first and second fresh air blades 621 superimpose with each other, reducing vortex noise.

[0180] In some embodiments, such as Figure 13 , Figure 19As shown, the first fresh air blade 621 is constructed in the shape of an arc-shaped tile. In a plane perpendicular to the axis of the fresh air fan 6, the inner radial end of the first fresh air blade 621 is located inside the outer radial end of the first fresh air blade 621. The outer radial end of the first fresh air blade 621 is located at the first circumferential position E1 of the fresh air wheel 61, and the inner radial end of the first fresh air blade 621 is located at the second circumferential position E2 of the fresh air wheel 61. In the circumferential direction of the fresh air wheel 61, the second circumferential position E2 is different from the first circumferential position E1, and the line connecting the second circumferential position E2 and the first circumferential position E1 does not pass through the center of the fresh air wheel 61. In the circumferential direction of the fresh air wheel 61, one side of the first fresh air blade 621 is concave, and the other side is convex.

[0181] When the second motor 5 drives the fresh air fan 6 to rotate, the concave surface of the first fresh air blade 621 pushes the air to move. The concave surface of the first fresh air blade 621 has a large pushing force on the air. The concave surface of the first fresh air blade 621 wraps the air, making it easier to generate vortices around the first fresh air blade 621.

[0182] Similarly, such as Figure 16 , Figure 18 As shown, the second fresh air blade 622 is constructed in an arc-shaped tile form. In a plane perpendicular to the axis of the fresh air fan 6, the inner radial end of the second fresh air blade 622 is located inside the outer radial end of the second fresh air blade 622. The outer radial end of the second fresh air blade 622 is located at the third circumferential position E3 of the fresh air impeller 61, and the inner radial end of the second fresh air blade 622 is located at the fourth circumferential position E4 of the fresh air impeller 61. In the circumferential direction of the fresh air impeller 61, the fourth circumferential position E4 is different from the third circumferential position E3, and the line connecting the fourth circumferential position E4 and the third circumferential position E3 does not pass through the center of the fresh air impeller 61. In the circumferential direction of the fresh air impeller 61, one side of the second fresh air blade 622 is concave, and the other side is convex.

[0183] The concave curvature of the second fresh air blade 622 is the same as that of the first fresh air blade 621. Thus, when the second motor 5 drives the fresh air fan 6 to rotate, both the concave surfaces of the first and second fresh air blades 621 and 622 push the air. The concave surface of the second fresh air blade 622 has a greater pushing force on the air. The concave surface of the second fresh air blade 622 wraps around the air, making it easier to generate vortices around the second fresh air blade 622.

[0184] According to the wall-mounted air conditioner 10000 of this utility model embodiment, by providing fresh air blades 62 on both sides of the fresh air wheel 61, it is beneficial to reduce the vortex noise when the fresh air fan 6 rotates.

[0185] In some embodiments, the length of the second fresh air blade 622 is less than the length of the first fresh air blade 621 along the axial direction of the fresh air fan 6. (Refer to...) Figure 12 As shown, along the axial direction of the fresh air fan 6, the length of the second fresh air blade 622 is h12, and the length of the first fresh air blade 621 is h11, satisfying that h12 < h11. The first fresh air blade 621 faces the axial air intake end, therefore its axial length is greater, which is beneficial for obtaining a larger volume of fresh air intake. The shorter second fresh air blade 622 is used to supplement the fresh air intake. Furthermore, the longer first fresh air blade 621 on the windward side helps to reduce noise while ensuring sufficient fresh air volume.

[0186] In some embodiments, refer to Figure 12 As shown, along the axial direction of the fresh air fan 6, the length of the second fresh air blade 622 is h12, and the length of the first fresh air blade 621 is h11, satisfying: 0.1≤h12 / h11≤0.45.

[0187] In some embodiments, 0.1 ≤ h12 / h11. When h12 / h11 < 0.1, the length of the second fresh air blade 622 is too short, and the vortex generated by the second fresh air blade 622 is too small when the fresh air fan 6 rotates, resulting in an insignificant effect on noise reduction. Therefore, setting 0.1 ≤ h12 / h11 ensures that the length of the second fresh air blade 622 is not too short, and that the vortex generated by the second fresh air blade 622 is not too small when driving the fresh air fan 6 to rotate, thus significantly reducing noise.

[0188] In some embodiments, h12 / h11 ≤ 0.45. When h12 / h11 > 0.45, the length of the second fresh air blade 622 is too long, resulting in an excessively thick overall thickness of the fresh air fan 6, which in turn leads to an excessively large axial length of the entire ventilation assembly. This is detrimental to shortening the overall length of the wall-mounted air conditioner 10000. If the total thickness of the fresh air fan 6 is to remain unchanged, then h12 / h11 > 0.45 would result in an excessively short length of the first fresh air blade 621, leading to a reduction in air intake. Therefore, setting h12 / h11 ≤ 0.45 ensures that the length of the second fresh air blade 622 is not too long, thus preventing an excessively thick overall thickness of the fresh air fan 6 and an excessively large axial length of the entire ventilation assembly, which is beneficial for shortening the overall length of the wall-mounted air conditioner 10000. Simultaneously, the length of the first fresh air blade 621 is greater than the length of the second fresh air blade 622, ensuring a larger air intake.

[0189] Optionally, h12 / h11 can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, etc., and h12 / h11 can also be other values ​​between 0.1 and 0.45, which will not be listed here.

[0190] In some embodiments, h12 / h11 = 0.2, that is, h11 = 5 × h12. In this way, the length of the second fresh air blade 622 is not too short, the length of the first fresh air blade 621 is not too long, and the length ratio of the second fresh air blade 622 to the first fresh air blade 621 is appropriate, which can reduce the operating noise of the fresh air fan 6 while ensuring the air intake.

[0191] In some embodiments, such as Figure 13 , Figure 19 As shown, there are multiple first fresh air blades 621, which are arranged circumferentially on the fresh air impeller 61, with the first fresh air blades 621 located at the edge of the fresh air impeller 61. Compared to placing the first fresh air blades 621 at the center of the fresh air impeller 61, placing the first fresh air blades 621 at the edge of the fresh air impeller 61 makes it easier to generate eddies.

[0192] In some embodiments, such as Figure 16 , Figure 18 As shown, there are multiple second fresh air blades 622, which are arranged circumferentially on the fresh air impeller 61, with the blades located at the edge of the impeller 61. Compared to placing the second fresh air blades 622 at the center of the impeller 61, placing them at the edge of the impeller 61 makes it easier to generate vortices.

[0193] In some embodiments, refer to Figure 12 As shown, in the circumferential direction of the fresh air fan 6, the distance between two adjacent first fresh air blades 621 and the distance between two adjacent second fresh air blades 622 are both C. The first fresh air blades 621 and second fresh air blades 622 are staggered by a distance D, that is, the circumferential distance between the first fresh air blade 621 and the adjacent second fresh air blade 622 is D, satisfying: 0.1≤D / C≤0.8. Specifically, multiple first fresh air blades 621 are evenly arranged on the fresh air wheel 61, and multiple second fresh air blades 622 are evenly arranged on the fresh air wheel 61. In the circumferential direction of the fresh air fan 6, there is a first gap between any two adjacent first fresh air blades 621 and a second gap between any two adjacent second fresh air blades 622. The first gap and the second gap are equal. C refers to the size of the first gap, which is also the size of the second gap. D refers to the minimum distance between the first fresh air blade 621 and the adjacent second fresh air blade 622 in the circumferential direction of the fresh air fan 6. In other words, D refers to the minimum distance between the projection of the first fresh air blade 621 on the fresh air wheel 61 and the projection of the second fresh air blade 622 on the fresh air wheel 61.

[0194] The staggered arrangement of the first fresh air blade 621 and the second fresh air blade 622 allows the vortex generated at the first fresh air blade 621 to lag behind the vortex generated at the second fresh air blade 622. Compared to a scheme where the first fresh air blade 621 and the second fresh air blade 622 are not staggered, the staggered arrangement of the first fresh air blade 621 and the second fresh air blade 622, after being superimposed, has a better effect on eliminating the noise of the fresh air fan 6 rotation.

[0195] In some embodiments, 0.1 ≤ D / C. When D / C < 0.1, the misalignment distance between the first fresh air blade 621 and the second fresh air blade 622 is small, causing the eddies generated at the first fresh air blade 621 to not significantly lag behind the eddies generated at the second fresh air blade 622, resulting in poor noise reduction for the fresh air fan 6. Therefore, setting D / C to 0.1 ≤ D / C results in a larger misalignment distance between the first fresh air blade 621 and the second fresh air blade 622. The superposition of the eddies generated at the first and second fresh air blades leads to better noise reduction for the fresh air fan 6.

[0196] In some embodiments, D / C ≤ 0.8. When D / C > 0.8, although one second fresh air blade 622 is far from the first first fresh air blade 621, it will be close to the other first fresh air blade 621, resulting in a smaller offset distance between the second fresh air blade 622 and the first fresh air blade 621. Therefore, setting D / C ≤ 0.8 ensures that the second fresh air blade 622 is offset by a large distance from the first fresh air blades 621 on both sides of the second fresh air blade 622. After the eddies generated at the first fresh air blade 621 and the eddies generated at the second fresh air blade 622 are superimposed, the effect of eliminating the rotation noise of the fresh air fan 6 is better.

[0197] In some embodiments, D / C ≤ 0.5, such that the distance between a second fresh air blade 622 and a first fresh air blade 621 is less than or equal to the distance between the second fresh air blade 622 and another first fresh air blade 621.

[0198] In some embodiments, such as Figures 12-13 , Figures 17-19As shown, the ends of multiple first fresh air blades 621 furthest from the fresh air impeller 61 are connected by a first ring 63. The first ring 63 is separated from the fresh air impeller 61, and air gaps are formed between adjacent first fresh air blades 621, the fresh air impeller 61, and the first ring 63, allowing the first fresh air blades 621 to better push air to form vortices. The first ring 63 is used to increase the connection strength of the multiple first fresh air blades 621. When the fresh air fan 6 rotates, it prevents the relative displacement of the ends of the multiple first fresh air blades 621 furthest from the fresh air impeller 61 from being too large, which could cause the root of the end of the first fresh air blade 621 connected to the fresh air impeller 61 to break off.

[0199] In some embodiments, such as Figures 12-13 , Figures 17-19 As shown, the ends of the multiple second fresh air blades 622 that are away from the fresh air wheel 61 are separated from each other, without wheel rims, which reduces the overall weight of the fresh air fan 6.

[0200] In some embodiments, the ends of the multiple second fresh air blades 622 furthest from the fresh air impeller 61 are all connected to a second ring. The second ring is separated from the fresh air impeller 61, and an airflow gap is formed between adjacent second fresh air blades 622, the fresh air impeller 61, and the second ring. This allows the second fresh air blades 622 to better push air to form vortices. The second ring is used to increase the connection strength of the multiple second fresh air blades 622. When the fresh air fan 6 rotates, it prevents the relative displacement of the ends of the multiple second fresh air blades 622 furthest from the fresh air impeller 61 from being too large, which could cause the root of the end of the second fresh air blade 622 connected to the fresh air impeller 61 to break off.

[0201] In some embodiments, refer to Figure 12 , Figure 14 As shown, the ends of the multiple exhaust blades 72 that are away from the exhaust wheel 71 are separated from each other, without a wheel rim, which reduces the overall weight of the exhaust fan 7.

[0202] In some embodiments, refer to Figure 20 As shown, the ends of the multiple exhaust blades 72 furthest from the exhaust wheel 71 are all connected to the exhaust wheel ring 75. The exhaust wheel ring 75 is separated from the exhaust wheel 71, and air gaps are formed between adjacent exhaust blades 72 and the exhaust wheel 71 and exhaust wheel ring 75, allowing the exhaust blades 72 to better push the air to form vortices. The exhaust wheel ring 75 is used to increase the connection strength of the multiple exhaust blades 72. When the exhaust fan 7 rotates, it prevents the relative displacement of the ends of the multiple exhaust blades 72 furthest from the exhaust wheel 71 from being too large, which could cause the root of the end of the exhaust blade 72 connected to the exhaust wheel 71 to break.

[0203] In some embodiments, such as Figure 13 , Figure 16 , Figures 18-19 As shown, the fresh air impeller 61 is provided with an impeller hole 612, which extends axially through the fresh air impeller 61. The impeller hole 612 is used to draw in air through one side of the second fresh air blade 622, thereby allowing the air on the side where the first fresh air blade 621 is located to reach the side where the second fresh air blade 622 is located through the impeller hole 612, thus generating a large vortex at the second fresh air blade 622.

[0204] In some embodiments, the fresh air impeller 61 has multiple impeller holes 612 in the radial direction, and these multiple impeller holes 612 are arranged circumferentially on the fresh air impeller 61. As a result, in the circumferential direction of the fresh air impeller 61, the air on the side where the first fresh air blade 621 is located can pass through the multiple impeller holes 612 to reach the side where the second fresh air blade 622 is located, thereby improving the airflow efficiency.

[0205] In some embodiments, the distance from the disc hole 612 to the center of the fresh air impeller 61 is less than the distance from the fresh air blade 62 to the center of the fresh air impeller 61. In other words, the distance from the disc hole 612 to the center of the fresh air impeller 61 is less than the distance from either the first fresh air blade 621 or the second fresh air blade 622 to the center of the fresh air impeller 61. That is, the disc hole 612 is closer to the center of the fresh air impeller 61 than the first fresh air blade 621 or the second fresh air blade 622. (Refer to...) Figure 13 , Figure 16 As shown, the distance from the disc hole 612 to the center of the fresh air disc 61 refers to the minimum distance from the wall of the disc hole 612 to the center of the fresh air disc 61, which is L0. The distance from either the first fresh air blade 621 or the second fresh air blade 622 to the center of the fresh air disc 61 refers to the minimum distance from either the first fresh air blade 621 or the second fresh air blade 622 to the center of the fresh air disc 61, which is L1, where L0 < L1. This is beneficial because when the second fresh air blade 622 draws air from the disc hole 612, it guides the airflow axially into the space where the second fresh air blade 622 is located, reducing the turbulence caused by competition with the first fresh air blade 621 for airflow.

[0206] In some embodiments, the disc hole 612 is located on the side of the first fresh air blade 621 and the second fresh air blade 622 closer to the center of the fresh air disc 61. The distance from the disc hole 612 to either the first fresh air blade 621 or the second fresh air blade 622 is less than the distance from the disc hole 612 to the center of the fresh air disc 61. The distance from the disc hole 612 to either the first fresh air blade 621 or the second fresh air blade 622 refers to the minimum radial distance between any blade of the first fresh air blade 621 or the second fresh air blade 622 and the wall of the disc hole 612, which is L2, where L2 < L0. That is, the disc hole 612 is closer to the first fresh air blade 621 and the second fresh air blade 622 than to the center of the fresh air disc 61. In this way, the air on the side of the fresh air disc 61 facing the heat exchange fan 41 can reach the second fresh air blade 622 more quickly through the disc hole 612, and eddies can be generated at the second fresh air blade 622 more quickly.

[0207] In some embodiments, the disc hole 612 extends radially along the fresh air impeller 61, and in the radial direction of the fresh air impeller 61, the width of the end of the disc hole 612 away from the center of the fresh air impeller 61 is greater than the width of the end of the disc hole 612 near the center of the fresh air impeller 61. (Refer to...) Figure 13 As shown, the end of the disc hole 612 furthest from the center of the fresh air disc 61 is the radial outer end of the disc hole 612, with a width of w1. The end of the disc hole 612 closest to the center of the fresh air disc 61 is the radial inner end of the disc hole 612, with a width of w2, where w1 > w2. This results in the air volume at the radial outer end of the disc hole 612 being greater than that at the radial inner end, allowing more air to reach the second fresh air blade 622 and ensuring a larger vortex generated at the second fresh air blade 622.

[0208] In some embodiments, such as Figures 17-19 As shown, the fresh air impeller 61 includes a fresh air impeller body 611 and a connecting part 613. The connecting part 613 is disposed on the fresh air impeller body 611 and has a connecting hole 6131 for connecting with the second motor 5. In the axial direction of the fresh air fan 6, the length of the connecting part 613 is greater than the length of the fresh air impeller body 611. By setting the connecting part 613, the connection between the second motor 5 and the fresh air fan 6 can be ensured to be firm. The fresh air impeller body 611 can be made thinner, and the thickness of the fresh air impeller body 611 does not need to take into account the connection between the fresh air fan 6 and the second motor 5, which helps to save material costs for the fresh air impeller body 611 and reduce the overall weight of the fresh air fan 6.

[0209] In some embodiments, such as Figure 11 As shown, the total axial thickness of the exhaust fan 7, including the exhaust wheel 71 and the exhaust blades 72, is h2. Figure 12 As shown, the total axial thickness of the fresh air impeller 61, the first fresh air blade 621, and the second fresh air blade 622 on the fresh air fan 6 is h1, where h2 < h1. This configuration ensures that the fresh air volume is greater than the exhaust air volume while increasing the axial thickness of the main body of the fresh air fan 7, resulting in greater structural strength and the ability to withstand greater torque. In contrast, the exhaust fan 7 requires less airflow, and its smaller axial thickness allows for a reduction in exhaust airflow, while also decreasing the axial dimensions of the bidirectional ventilation assembly.

[0210] In some embodiments, such as Figure 8 , Figure 15 As shown, the first volute 81 is located on the side of the second fresh air blade 622 away from the fresh air impeller 61, and the second volute 82 is located on the side of the first fresh air blade 621 away from the fresh air impeller 61. The second volute 82 has an axial ventilation opening 8211 at its radial center. The axial air inlet end of the first fresh air blade 621 faces the axial ventilation opening 8211. A fresh air inlet 801 is located on the second volute 82, on the side of the axial ventilation opening 8211 away from the second fresh air blade 622 along the axial direction of the fresh air fan 6. Outdoor air entering the second volute 82 from the fresh air inlet 801 first reaches the first fresh air blade 621 and then the second fresh air blade 622.

[0211] In some embodiments, refer to Figure 13 , Figure 16 , Figures 18-19 The fresh air impeller 61 is provided with an impeller hole 612, which axially penetrates the fresh air impeller 61. In the radial direction of the fresh air fan 6, the impeller hole 612 is located on the side of the first fresh air blade 621 and the second fresh air blade 622 closer to the center of the fresh air impeller 61. The impeller hole 612 is used to guide the outdoor air that enters the volute cavity V011 through the fresh air inlet 801 and the axial ventilation port 8211 from the side of the fresh air impeller 61 toward the first fresh air blade 621 to the side of the fresh air impeller 61 toward the second fresh air blade 622, thereby generating vortices around the first fresh air blade 621 and around the second fresh air blade 622. The vortices generated at the first fresh air blade 621 and the vortices generated at the second fresh air blade 622 are superimposed on each other, which can reduce vortex noise.

[0212] In some embodiments, refer to Figure 14 The first volute 81 includes a first volute end plate 811 and a first volute surrounding plate 812. The first volute end plate 811 is located on the side of the second fresh air blade 622 away from the fresh air impeller 61, and the first volute surrounding plate 812 extends along the edge of the first volute end plate 811 toward the heat exchange fan 41.

[0213] In some embodiments, refer to Figure 5 , Figure 8 and Figure 15 The second volute 82 includes a second volute half 821 and a fan cover 822. The second volute half 821 is located on the side of the first fresh air blade 621 away from the fresh air wheel 61. The fan cover 822 is located on the side of the second volute half 821 away from the fresh air fan 6 and is detachably connected to the second volute half 821.

[0214] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0215] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wall-mounted air conditioner (10000), comprising: Body (1000), said body (1000) includes: The housing (1) has an accommodating cavity (V1) inside. The housing (1) has a heat exchange inlet (101) and a heat exchange outlet (102). In the height direction of the main body (1000), the heat exchange inlet (101) is located above the heat exchange outlet (102). An indoor heat exchanger (2) is disposed within the accommodating cavity (V1); The base (3) is located in the accommodating cavity (V1) and a spiral tongue air duct is formed thereon; A heat exchange fan (41) is installed in the volute air duct and is located on the side of the indoor heat exchanger (2) away from the heat exchange air inlet (101); The first motor (42) is disposed in the accommodating cavity (V1) and located at one end of the body (1000) along its length, for driving the heat exchange fan (41) to rotate so that the air inside the air conditioner exchanges heat with the indoor space; Fresh air fan (6), the fresh air fan (6) is a centrifugal fan with axial air intake and radial air outlet, the fresh air fan (6) is located on the side of the heat exchange fan (41) away from the first motor (42); Fresh air volute (8), a fresh air duct (V01) is formed inside the fresh air volute (8), a fresh air fan (6) is installed inside the fresh air volute (8), and a fresh air inlet (801) and a fresh air outlet (802) are formed on the fresh air volute (8). The rotation of the fresh air fan (6) allows outdoor air to enter the fresh air volute (8) from the fresh air inlet (801), and allows outdoor air entering the fresh air volute (8) to enter the room from the fresh air outlet (802); The fresh air fan (6) includes: Fresh air wheel (61), First fresh air blade (621), The second fresh air blade (622) is located between the second fresh air blade (622) and the fresh air inlet (801) in the axial direction of the fresh air fan (6). In the axial direction of the fresh air fan (6), the length of the second fresh air blade (622) is less than the length of the first fresh air blade (621); The first fresh air blade (621) consists of multiple blades, which are arranged circumferentially on the fresh air wheel (61). The first fresh air blade (621) is located at the edge of the fresh air wheel (61). The second fresh air blade (622) consists of multiple blades, which are arranged circumferentially on the fresh air wheel (61). The second fresh air blades (622) are located at the edge of the fresh air wheel (61). Along the axial direction of the fresh air fan (6), the length of the second fresh air blade (622) is h12, and the length of the first fresh air blade (621) is h11, satisfying: 0.1≤h12 / h11≤0.

45.

2. The wall-mounted air conditioner (10000) according to claim 1, characterized in that, 0.2≤h12 / h11≤0.

3. 3.The wall-mounted air conditioner (10000) according to claim 1, wherein, 0.3≤h12 / h11≤0.

4. 4.The wall-mounted air conditioner (10000) according to claim 1, wherein, 0.4≤h12 / h11≤0.

45. 5.The wall-mounted air conditioner (10000) according to claim 1, wherein, In the circumferential direction of the fresh air fan (6), the distance between two adjacent first fresh air blades (621) and the distance between two adjacent second fresh air blades (622) are both C. The first fresh air blades (621) and the second fresh air blades (622) are staggered by a distance of D, satisfying: 0.1≤D / C≤0.

8. 6.The wall-mounted air conditioner (10000) according to claim 5, characterized in that, It satisfies: 0.1≤D / C≤0.

5.

7. The wall-mounted air conditioner (10000) according to any one of claims 1-6, characterized in that, The fresh air volute (8) includes: First volute (81), The second volute (82) is located on the side of the first volute (81) facing the heat exchange fan (41) and is detachably connected to the first volute (81). A volute cavity (V011) is formed between the second volute (82) and the first volute (81), and the fresh air fan (6) is located in the volute cavity (V011). The first volute (81) is located on the side of the second fresh air blade (622) away from the fresh air wheel (61), and the second volute (82) is located on the side of the first fresh air blade (621) away from the fresh air wheel (61). The second volute (82) has an axial vent (8211) at its center in the radial direction. The axial air inlet end of the first fresh air blade (621) is positioned toward the axial vent (8211). The fresh air inlet (801) is located on the second volute (82). In the axial direction of the fresh air fan (6), the fresh air inlet (801) is located on the side of the axial vent (8211) away from the second fresh air blade (622).

8. The wall-mounted air conditioner (10000) according to claim 7, characterized in that, The second volute (82) includes: a second volute half (821) and a fan cover (822). The second volute half (821) is located on the side of the first volute (81) facing the heat exchange fan (41) and is detachably connected to the first volute (81). The second volute half (821) has an axial vent (8211) at the center in the radial direction. A volute cavity (V011) is formed between the second volute half (821) and the first volute (81). The fresh air fan (6) is located in the volute cavity (V011), and the axial air inlet end of the fresh air fan (6) is arranged facing the axial vent (8211). The fan cover (822) is located on the side of the second volute half (821) facing the heat exchange fan (41) and is detachably connected to the second volute half (821).

9. The wall-mounted air conditioner (10000) according to any one of claims 1-6, characterized in that, The fresh air impeller (61) is provided with an impeller hole (612), which axially penetrates the fresh air impeller (61) and extends radially along the fresh air impeller (61). In the radial direction of the fresh air impeller (61), the width of the end of the impeller hole (612) away from the center of the fresh air impeller (61) is greater than the width of the end of the impeller hole (612) close to the center of the fresh air impeller (61).

10. The wall-mounted air conditioner (10000) according to claim 7, characterized in that, The fresh air impeller (61) is provided with an impeller hole (612), which axially penetrates the fresh air impeller (61). In the radial direction of the fresh air fan (6), the impeller hole (612) is located on the side of the first fresh air blade (621) and the second fresh air blade (622) closer to the center of the fresh air impeller (61). The impeller hole (612) is used to guide the outdoor air that enters the volute cavity (V011) through the fresh air inlet (801) and the axial ventilation port (8211) from the side of the fresh air impeller (61) facing the first fresh air blade (621) to the side of the fresh air impeller (61) facing the second fresh air blade (622). The distance from the disc hole (612) to either the first fresh air blade (621) or the second fresh air blade (622) is less than the distance from the disc hole (612) to the center of the fresh air disc (61).

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