Fresh air assembly and air conditioner

Abstract

The utility model provides a kind of new air component and air conditioner, new air component includes volute assembly, rotary volute tongue and drive assembly;First air outlet, second air outlet and third air outlet are opened on the lateral wall of volute assembly;First air outlet and second air outlet are arranged along the axial direction of fan blade mounting cavity, the outside of volute assembly is provided with heat exchanger installation site, first air outlet and second air outlet are all towards heat exchanger installation site setting;Heat exchanger installation site is provided with inner fan installation site towards the side of new air component, and fan blade mounting cavity is part of inner fan installation site;Second air outlet and third air outlet are arranged along the circumferential direction of fan blade mounting cavity, third air outlet is provided with new air pipe communication part, drive assembly drives rotary volute tongue to rotate, in first position, rotary volute tongue closes second air outlet and opens third air outlet;In second position, rotary volute tongue closes third air outlet and opens second air outlet.New air component is simple in structure, energy-efficient, and high in space utilization.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a fresh air component and an air conditioner. Background Technology

[0002] See Figure 1 and Figure 2 Wall-mounted or ceiling-mounted air conditioners can be installed on walls or ceilings. They are relatively thin, and the air conditioner's fan 101 typically uses multiple centrifugal fan blades 102 to circulate indoor air. The working principle is as follows: Figure 2 As shown, the fan motor drives the centrifugal fan blade 102 to rotate. Indoor air enters the fan 101 from the air conditioner return air inlet 103 and flows out from the fan outlet 104. After exchanging heat with the air conditioner heat exchanger 105, it is delivered to the room through the air conditioner air outlet 106. There is a guide vane 107 at the air conditioner air outlet 106 to adjust the direction of the air supply, thus completing the indoor air circulation in the room.

[0003] When users use traditional air conditioners to regulate indoor air temperature and humidity, they typically only circulate the existing air. With the indoor space relatively closed for extended periods and lacking fresh air replenishment, indoor air quality gradually declines, impacting user experience and comfort. Fresh air systems can provide fresh air to the indoor space, improving indoor air quality.

[0004] However, existing fresh air systems have the following shortcomings: Current technologies often use fresh air motors to drive the system, enabling indoor and outdoor air exchange. However, this approach suffers from high energy consumption, complex structure, and high noise levels. For example, in wall-mounted or ceiling-mounted air conditioners, the fresh air motor occupies valuable space, affecting the overall design, and increases weight when wall-mounted or ceiling-mounted. Utility Model Content

[0005] The primary objective of this invention is to provide a fresh air assembly that is simple in structure, energy-efficient, and has high space utilization.

[0006] The second objective of this invention is to provide an air conditioner that uses the aforementioned fresh air assembly.

[0007] To achieve the aforementioned first objective, this utility model provides a fresh air assembly, including a volute assembly, a rotating volute tongue, and a drive assembly. The volute assembly has a fan blade mounting cavity that extends axially through the volute assembly. The rotating volute tongue is disposed on the inner wall of the fan blade mounting cavity and slides in cooperation with the volute assembly in the circumferential direction of the fan blade mounting cavity. A first air outlet, a second air outlet, and a third air outlet are provided on the side wall of the volute assembly. The first and second air outlets are arranged axially along the fan blade mounting cavity. A heat exchanger mounting position is provided on the outer side of the volute assembly. Both the first and second air outlets are positioned facing the heat exchanger mounting location; an internal fan mounting location is located on the side of the heat exchanger mounting location facing the fresh air assembly, and the fan blade mounting cavity is part of the internal fan mounting location; the second and third air outlets are arranged circumferentially along the fan blade mounting cavity, and the third air outlet is provided with a fresh air duct connection; the drive assembly drives the rotating volute to rotate between a first position and a second position; in the first position, the rotating volute closes the second air outlet and opens the third air outlet; in the second position, the rotating volute closes the third air outlet and opens the second air outlet.

[0008] As can be seen from the above scheme, when the ventilation mode is turned on, the drive component drives the rotating volute to rotate to the first position. The rotating volute closes the second air outlet and opens the third air outlet. After the indoor fan starts, a portion of the indoor air is sent from the first air outlet to the heat exchanger to circulate the indoor air. At the same time, a portion of the indoor air is sent out to the outside from the third air outlet. Fresh air enters the room through the gaps in the doors and windows, completing the ventilation of the indoor air.

[0009] When other non-heat exchange modes such as cooling or heating are activated, the drive component drives the rotating volute to rotate to the second position. The rotating volute closes the third air outlet and opens the second air outlet. After the indoor fan starts, a portion of the indoor air is sent from the first and second air outlets to the heat exchanger, and then sent back to the room from the air conditioner's indoor air outlet. Only indoor air circulation is performed, so that all the air volume is used for indoor air circulation, maintaining high air conditioning efficiency.

[0010] By setting a fan blade mounting cavity within the fresh air component, a portion of the indoor fan can be extended into the fan blade mounting cavity. This allows the air conditioner's own indoor fan to exhaust stale indoor air, achieving the fresh air function without the need for an additional fresh air motor. This effectively reduces the energy consumption and manufacturing cost of the fresh air air conditioner, simplifies the structure, improves system integration, and achieves overall lightweighting. It solves the problems of complex structure, high cost, high energy consumption, heavy weight, and large space occupation caused by the need for an additional fresh air motor in traditional air conditioners to achieve the fresh air function.

[0011] In a preferred embodiment, the volute assembly includes a first volute and a second volute, the second volute including a second volute base and a second volute cover, the first volute, the second volute base and the second volute cover being sequentially connected along the axial direction of the fan blade mounting cavity; a first air outlet is located on the first volute, a second air outlet is located on the second volute, and a rotating volute tongue is installed inside the second volute.

[0012] It can be seen that the arrangement of the second volute base and the second volute cover along the axial direction facilitates the assembly of the internal rotating volute tongue.

[0013] A further embodiment is that a first guide groove is formed on the side wall of the second volute base, and a second guide groove is formed on the side wall of the second volute cover; a first sliding protrusion and a second sliding protrusion are respectively provided at both ends of the rotating volute tongue; the first sliding protrusion is inserted into the first guide groove along the axial direction of the fan blade mounting cavity, and the first sliding protrusion and the first guide groove slide together along the circumference of the fan blade mounting cavity; the second sliding protrusion is inserted into the second guide groove along the axial direction of the fan blade mounting cavity, and the second sliding protrusion and the second guide groove slide together along the circumference of the fan blade mounting cavity.

[0014] Therefore, the first guide groove and the second guide groove on the second volute can provide stable support for the rotating volute tongue, and at the same time guide the rotating volute tongue, ensuring that the rotating volute tongue can rotate stably in the second volute and achieve smooth switching between the first position and the second position.

[0015] A further design includes a limiting protrusion on the outer peripheral wall of the rotating volute, and a stop on the inner wall of the second volute base. The limiting protrusion and the stop engage in a circumferential limiting fit within the fan blade mounting cavity. When the rotating volute rotates to the first or second position, the limiting protrusion abuts against the stop.

[0016] It can be seen that by setting limit protrusions and stops, the rotating worm tongue can be rotated into place while preventing it from dislodging from the guide groove.

[0017] A preferred embodiment is that, in the axial direction of the fan blade mounting cavity, the width of the first volute is greater than the width of the second volute.

[0018] Therefore, the total air volume of the fan blades located in the fan blade mounting cavity is Q, and the corresponding air volumes of the first, second, and third outlets are Q1, Q2, and Q3, respectively. Ignoring duct resistance, the air volume distribution relationship of the internal fan is Q = Q1 + Q2 or Q = Q1 + Q3. Since the width of the first volute is greater than the width of the second volute, Q1 > Q2 and Q3. The internal fan is mainly used for indoor air circulation, only using part of the air duct of the air conditioner's internal fan to exhaust indoor air to the outside, partially replacing indoor air, improving indoor air quality, and ensuring that the air conditioning efficiency does not decrease significantly.

[0019] In a preferred embodiment, the drive assembly includes a worm gear motor and a gear. The worm gear motor is mounted on the second worm housing cover and located on the side of the second worm housing cover away from the second worm housing base. The gear is mounted on the drive shaft of the worm gear motor and located on the side of the second worm housing cover facing the second worm housing base. A rack is also provided on the outer peripheral wall of the rotating worm gear near the end of the second worm housing cover. The rack extends circumferentially along the rotating worm gear, and the gear is driven to connect with the rack.

[0020] As can be seen, the drive component has a simple structure, and the switching of the rotating worm tongue between two positions can be achieved through a simple gear and rack combination.

[0021] A further solution is to have the gear mesh with the rack.

[0022] To achieve the second objective mentioned above, this utility model provides an air conditioner, including an air conditioner housing, an indoor fan, a heat exchanger, a fresh air duct, and the aforementioned fresh air assembly; the indoor fan, heat exchanger, and fresh air assembly are all located inside the air conditioner housing, the indoor fan is located at the indoor fan mounting position, a portion of the indoor fan extends into the fan blade mounting cavity, the heat exchanger is located at the heat exchanger mounting position, and the fresh air duct is connected to the fresh air duct connection portion; the air conditioner housing has an air conditioner return air vent, an air conditioner indoor air outlet, and an air conditioner outdoor air outlet, the air conditioner return air vent is connected to the fan blade mounting cavity, the first air outlet and the second air outlet are both connected to the air conditioner indoor air outlet, and the third air outlet is connected to the air conditioner outdoor air outlet.

[0023] As can be seen from the above solution, the air conditioner of the present invention can utilize part of the air duct of the air conditioner fan to exhaust indoor stale air to the outside and allow fresh air to enter the room through the gaps in doors and windows, thereby completing indoor air exchange, improving indoor air quality, effectively reducing overall energy consumption and simplifying structural design. This solves the technical problem of high energy consumption and complex structure caused by the need for a separate fresh air motor in traditional air conditioners to achieve the fresh air exchange function.

[0024] A preferred embodiment is that, in ventilation mode, the rotating volute is in the first position, and the internal fan sends part of the airflow to the outside through the third air outlet and sends part of the airflow to the heat exchanger through the first air outlet; in non-ventilation mode, the rotating volute is in the second position, and the internal fan sends part of the airflow to the heat exchanger through the first air outlet and the second air outlet.

[0025] A preferred embodiment is that the internal fan includes a fan motor, a first centrifugal fan blade, and a second centrifugal fan blade arranged on the same axis. The fan motor drives the first centrifugal fan blade and the second centrifugal fan blade to rotate. The first centrifugal fan blade is located inside the fan blade mounting cavity, and the second centrifugal fan blade is located outside the fan blade mounting cavity, which sends part of the airflow entering from the air conditioning return air inlet to the heat exchanger. Attached Figure Description

[0026] Figure 1This is a structural diagram of an existing air conditioner.

[0027] Figure 2 This is a cross-sectional view of an existing air conditioner.

[0028] Figure 3 This is a structural diagram of the air conditioner housing after the hidden portion of the air conditioner casing is shown in an embodiment of this utility model.

[0029] Figure 4 This is a structural diagram of the indoor fan and fresh air assembly in an embodiment of the air conditioner of this utility model.

[0030] Figure 5 This is a cross-sectional view of the fan motor, the first centrifugal fan blade, and the fresh air assembly in an embodiment of the air conditioner of this utility model.

[0031] Figure 6 This is a front view of the fan motor, the first centrifugal fan blade, and the fresh air assembly in an embodiment of the air conditioner of this utility model.

[0032] Figure 7 In ventilation mode, the air conditioner is Figure 6 Sectional view at point AA.

[0033] Figure 8 In non-ventilation mode, the air conditioner... Figure 6 Sectional view at point AA.

[0034] Figure 9 yes Figure 6 Sectional view at point BB.

[0035] Figure 10 This is a right view of the fresh air component in an embodiment of the air conditioner of this utility model.

[0036] Figure 11 yes Figure 10 Sectional view at point CC.

[0037] Figure 12 This is a top view of the fresh air component in an embodiment of the air conditioner of this utility model.

[0038] Figure 13 yes Figure 12 Sectional view at point DD.

[0039] Figure 14 This is an exploded view of the fresh air component in an embodiment of the air conditioner of this utility model.

[0040] Figure 15 This is a structural diagram of the second volute base in an embodiment of the air conditioner of this utility model.

[0041] Figure 16 This is a structural diagram of the rotating volute tongue in an embodiment of the air conditioner of this utility model.

[0042] Figure 17 This is a structural diagram of the second volute cover and the drive assembly in an embodiment of the air conditioner of this utility model.

[0043] Figure 18 This is a schematic diagram of the airflow direction in ventilation mode of an embodiment of the air conditioner of this utility model.

[0044] Figure 19 This is a schematic diagram of the airflow direction in the non-ventilation mode of an embodiment of the air conditioner of this utility model.

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0046] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0047] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0049] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0050] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0051] See Figures 3 to 19 In this embodiment, the air conditioner is a fresh air air conditioner. The air conditioner includes an air conditioner housing 1, an indoor fan 2, a heat exchanger 3, a fresh air duct 4, and a fresh air assembly 5. The indoor fan 2, the heat exchanger 3, and the fresh air assembly 5 are all located inside the air conditioner housing 1. The air conditioner housing 1 is provided with an air conditioner return air vent 11, an air conditioner indoor air outlet vent 12, and an air conditioner outdoor air outlet vent 13.

[0052] like Figure 3 and Figure 4 As shown, the internal fan 2 includes a fan motor 21, a first centrifugal fan blade 22, a second centrifugal fan blade 23, and a third centrifugal fan blade 24 arranged coaxially. In the axial direction, the fan motor 21 is located between the first centrifugal fan blade 22 and the second centrifugal fan blade 23, and the fan motor 21 drives the first centrifugal fan blade 22, the second centrifugal fan blade 23, and the third centrifugal fan blade 24 to rotate simultaneously. The first centrifugal fan blade 22 is located inside the fan blade mounting cavity 60 of the fresh air assembly 5, while the second centrifugal fan blade 23 and the third centrifugal fan blade 24 are both located outside the fan blade mounting cavity 60 and send part of the airflow entering from the air conditioning return air vent 11 to the heat exchanger 3.

[0053] like Figures 5 to 17 As shown, the fresh air assembly 5 includes a volute assembly 6, a rotating volute tongue 7, and a drive assembly 8. A fan blade mounting cavity 60 is formed within the volute assembly 6, which communicates with the air conditioning return air vent 11. The fan blade mounting cavity 60 extends axially through the volute assembly 6. The rotating volute tongue 7 is disposed on the inner wall of the fan blade mounting cavity 60 and slides in cooperation with the volute assembly 6 in the circumferential direction of the fan blade mounting cavity 60.

[0054] The volute assembly 6 has a first air outlet 63, a second air outlet 64, and a third air outlet 65 on its side wall. The first air outlet 63 and the second air outlet 64 are arranged along the axial direction of the fan blade mounting cavity 60. The first air outlet 63 and the second air outlet 64 are both connected to the indoor air outlet 12 of the air conditioner, and the third air outlet 65 is connected to the outdoor air outlet 13 of the air conditioner.

[0055] A heat exchanger mounting position 30 is provided on the outer side of the volute assembly 6. The heat exchanger 3 is located at the heat exchanger mounting position 30. The first air outlet 63 and the second air outlet 64 are both facing the heat exchanger mounting position 30. An internal fan mounting position 20 is provided on the side of the heat exchanger mounting position 30 facing the fresh air assembly 5. The fan blade mounting cavity 60 is part of the internal fan mounting position 20. The internal fan 2 is located at the internal fan mounting position 20, and a part of the internal fan 2 extends into the fan blade mounting cavity 60.

[0056] The second air outlet 64 and the third air outlet 65 are arranged around the fan blade mounting cavity 60. The third air outlet 65 is provided with a fresh air duct connection part 66. The fresh air duct 4 is connected to the outdoor air outlet 13 of the air conditioner and is connected to the fresh air duct connection part 66.

[0057] like Figure 7 and Figure 8 As shown, the drive assembly 8 drives the rotating volute 7 to rotate between a first position and a second position. In the first position, the rotating volute 7 closes the second air outlet 64 and opens the third air outlet 65; in the second position, the rotating volute 7 closes the third air outlet 65 and opens the second air outlet 64.

[0058] The volute assembly 6 includes a first volute 61 and a second volute 62. The second volute 62 includes a second volute base 621 and a second volute cover 622. The first volute 61, the second volute base 621, and the second volute cover 622 are sequentially connected along the axial direction of the fan blade mounting cavity 60. A first air outlet 63 is located on the first volute 61, and a second air outlet 64 is located on the second volute 62. A rotating volute tongue 7 is installed inside the second volute 62.

[0059] A first guide groove 623 is formed on the side wall of the second volute base 621, and a second guide groove 624 is formed on the side wall of the second volute cover 622. A first sliding protrusion 71 and a second sliding protrusion 72 are respectively provided at both ends of the rotating volute tongue 7. The first sliding protrusion 71 is inserted into the first guide groove 623 along the axial direction of the fan blade mounting cavity 60, and the first sliding protrusion 71 and the first guide groove 623 slide in a circumferential manner along the fan blade mounting cavity 60. The second sliding protrusion 72 is inserted into the second guide groove 624 along the axial direction of the fan blade mounting cavity 60, and the second sliding protrusion 72 and the second guide groove 624 slide in a circumferential manner along the fan blade mounting cavity 60. The first guide groove 623 and the second guide groove 624 on the second volute 62 provide stable support for the rotating volute tongue 7 and guide it, ensuring that the rotating volute tongue 7 can rotate stably within the second volute 62, achieving smooth switching between the first and second positions.

[0060] like Figure 13 and Figure 16As shown, a limiting protrusion 73 is also provided on the outer peripheral wall of the rotating volute 7, and a stop portion 625 is provided on the inner wall of the second volute base 621. The limiting protrusion 73 and the stop portion 625 are in a circumferential limiting engagement with each other in the fan blade mounting cavity 60. When the rotating volute 7 rotates to the first position or the second position, the limiting protrusion 73 abuts against the stop portion 625. By providing the limiting protrusion 73 and the stop portion 625, it is ensured that the rotating volute 7 can rotate into position while preventing the rotating volute 7 from disengaging from the guide groove.

[0061] like Figure 6 As shown, along the axial direction of the fan blade mounting cavity 60, the width L1 of the first volute 61 is greater than the width L2 of the second volute 62. The total air volume of the fan blades located in the fan blade mounting cavity 60 is Q, and the corresponding air volumes of the first, second, and third outlets are Q1, Q2, and Q3, respectively. Ignoring duct resistance, the air volume distribution relationship of the internal fan 2 is Q = Q1 + Q2 or Q = Q1 + Q3. Since the width L1 of the first volute 61 is greater than the width L2 of the second volute 62, Q1 > Q2 and Q3. The internal fan 2 is mainly used for indoor air circulation. It only uses part of the duct of the air conditioner internal fan 2 to exhaust indoor air to the outside, partially replacing indoor air, improving indoor air quality, and ensuring that the air conditioning efficiency does not decrease significantly.

[0062] The drive assembly 8 includes a volute motor 81 and a gear 82. The volute motor 81 is mounted on the second volute cover 622 and located on the side of the second volute cover 622 away from the second volute base 621. The gear 82 is disposed on the drive shaft of the volute motor 81 and located on the side of the second volute cover 622 facing the second volute base 621. A rack 74 is also provided at one end of the outer peripheral wall of the rotating volute 7 near the second volute cover 622. The rack 74 extends circumferentially along the rotating volute 7. The gear 82 is drivenly connected to the rack 74. Preferably, the gear 82 and the rack 74 directly mesh. The drive assembly 8 has a simple structure, and the switching between two positions of the rotating volute 7 can be achieved through the simple engagement of the gear 82 and the rack 74.

[0063] like Figure 18 As shown, when the ventilation mode is turned on, the drive component 8 drives the rotating volute 7 to rotate to the first position. The rotating volute 7 closes the second air outlet 64 and opens the third air outlet 65. After the indoor fan 2 starts, a portion of the indoor air is sent from the first air outlet 63 to the heat exchanger 3 to circulate the indoor air. At the same time, a portion of the indoor air is sent out to the outside from the third air outlet 65. Fresh air enters the room through the gaps in the doors and windows, completing the ventilation of the indoor air.

[0064] like Figure 19As shown, when other non-heat exchange modes such as cooling or heating are turned on, the drive component 8 drives the rotating volute 7 to rotate to the second position. The rotating volute 7 closes the third air outlet 65 and opens the second air outlet 64. After the indoor fan 2 starts, a portion of the indoor air is sent from the first air outlet 63 and the second air outlet 64 to the heat exchanger 3, and then sent back to the room from the air conditioner's indoor air outlet 12. Only indoor air circulation is performed, so that all the air volume is used for indoor air circulation, maintaining a high air conditioning efficiency.

[0065] As can be seen from the above, by setting a fan blade mounting cavity in the fresh air component, a part of the indoor fan can be extended into the fan blade mounting cavity, thereby using the air conditioner's own indoor fan to exhaust indoor stale air and achieve the fresh air function. There is no need to set up an additional fresh air motor, which can effectively reduce the energy consumption and manufacturing cost of fresh air air conditioners, simplify the structure, improve system integration, and achieve the weight reduction of the whole unit. It solves the problems of complex structure, high cost, high energy consumption, heavy weight, and large space occupation caused by the need to configure an additional fresh air motor when traditional air conditioners achieve the fresh air function.

[0066] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fresh air assembly, characterized in that, Includes the volute assembly, the rotating volute tongue, and the drive assembly; The volute assembly has a fan blade mounting cavity, which extends through the volute assembly along the axial direction. The rotating volute tongue is disposed on the inner wall of the fan blade mounting cavity and slides in cooperation with the volute assembly in the circumferential direction of the fan blade mounting cavity. The side wall of the volute assembly is provided with a first air outlet, a second air outlet and a third air outlet; The first air outlet and the second air outlet are arranged along the axial direction of the fan blade mounting cavity. A heat exchanger mounting position is provided on the outside of the volute assembly. Both the first air outlet and the second air outlet are arranged facing the heat exchanger mounting position. An internal fan mounting position is provided on the side of the heat exchanger mounting position facing the fresh air assembly, and the fan blade mounting cavity is part of the internal fan mounting position; The second air outlet and the third air outlet are arranged circumferentially along the fan blade mounting cavity, and the third air outlet is provided with a fresh air duct connection part; The drive assembly drives the rotating volute tongue to rotate between a first position and a second position; In the first position, the rotating volute closes the second air outlet and opens the third air outlet; In the second position, the rotating volute closes the third air outlet and opens the second air outlet.

2. The fresh air assembly according to claim 1, characterized in that: The volute assembly includes a first volute and a second volute. The second volute includes a second volute base and a second volute cover. The first volute, the second volute base, and the second volute cover are connected sequentially along the axial direction of the fan blade mounting cavity. The first air outlet is located on the first volute, the second air outlet is located on the second volute, and the rotating volute tongue is installed inside the second volute.

3. The fresh air assembly according to claim 2, characterized in that: A first guide groove is provided on the side wall of the second volute base, and a second guide groove is provided on the side wall of the second volute cover; The two ends of the rotating volute are respectively provided with a first sliding protrusion and a second sliding protrusion; The first sliding protrusion is inserted into the first guide groove along the axial direction of the fan blade mounting cavity, and the first sliding protrusion and the first guide groove slide together along the circumferential direction of the fan blade mounting cavity. The second sliding protrusion is inserted into the second guide groove along the axial direction of the fan blade mounting cavity, and the second sliding protrusion and the second guide groove slide together along the circumferential direction of the fan blade mounting cavity.

4. The fresh air assembly according to claim 3, characterized in that: The outer peripheral wall of the rotating volute tongue is also provided with a limiting protrusion, and the inner wall of the second volute base is provided with a stop part. The limiting protrusion and the stop part are in a circumferential limiting fit in the fan blade mounting cavity. When the rotating worm tongue rotates to the first position or the second position, the limiting protrusion abuts against the stop portion.

5. The fresh air assembly according to any one of claims 2 to 4, characterized in that: In the axial direction of the fan blade mounting cavity, the width of the first volute is greater than the width of the second volute.

6. The fresh air assembly according to any one of claims 2 to 4, characterized in that: The drive assembly includes a volute motor and a gear. The volute motor is mounted on the second volute cover and located on the side of the second volute cover away from the second volute base. The gear is disposed on the drive shaft of the volute motor and located on the side of the second volute cover facing the second volute base. A rack is also provided on the outer peripheral wall of the rotating volute tongue near the end of the second volute cover. The rack extends circumferentially along the rotating volute tongue, and the gear is drivenly connected to the rack.

7. The fresh air assembly according to claim 6, characterized in that: The gear meshes with the rack.

8. An air conditioner, characterized in that, Includes an air conditioner housing, an internal fan, a heat exchanger, a fresh air duct, and a fresh air assembly as described in any one of claims 1 to 7; The internal fan, the heat exchanger, and the fresh air assembly are all located inside the air conditioner housing. The internal fan is located at the internal fan mounting position, and a part of the internal fan extends into the fan blade mounting cavity. The heat exchanger is located at the heat exchanger mounting position, and the fresh air duct is connected to the fresh air duct connection part. The air conditioner housing has an air return vent, an indoor air outlet, and an outdoor air outlet. The air return vent is connected to the fan blade mounting cavity. The first air outlet and the second air outlet are both connected to the indoor air outlet, and the third air outlet is connected to the outdoor air outlet.

9. The air conditioner according to claim 8, characterized in that: In ventilation mode, the rotating volute is located in the first position, and the internal fan sends part of the airflow from the third air outlet to the outside, and sends part of the airflow from the first air outlet to the heat exchanger. In non-ventilation mode, the rotating volute is in the second position, and the internal fan sends part of the airflow from the first air outlet and the second air outlet to the heat exchanger.

10. The air conditioner according to claim 8 or 9, characterized in that: The internal fan includes a fan motor, a first centrifugal fan blade and a second centrifugal fan blade arranged on the same axis, and the fan motor drives the first centrifugal fan blade and the second centrifugal fan blade to rotate. The first centrifugal fan blade is located inside the fan blade mounting cavity, and the second centrifugal fan blade is located outside the fan blade mounting cavity, which sends part of the airflow entering from the air conditioner return air inlet to the heat exchanger.

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