An indoor unit and air conditioner

Abstract

The application provides an indoor unit and an air conditioner, the indoor unit comprising: a shell provided with an air inlet and an air outlet; a cross-flow fan arranged in an air duct of the shell, and provided with cross-flow fan blades; and a first heat exchange assembly arranged in an airflow space of the cross-flow fan, and in contact with the cross-flow fan blades; wherein the cross-flow fan drives the first heat exchange assembly to rotate when the cross-flow fan rotates. The application solves the problem of providing an indoor unit with simple structure and capable of fully allowing airflow to be subjected to heat exchange.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an indoor unit and an air conditioner. Background Technology

[0002] In the air conditioning industry, cross-flow fans are gaining increasing attention due to their large air volume and stable airflow, and are often used for air supply in indoor air conditioning units. Heat exchange in indoor air conditioning units is generally achieved through the operation of cross-flow fans, which draw in outside air, allow it to pass through the evaporator for heat exchange, and then discharge the heat-exchanged air.

[0003] However, the above heat exchange method has the following problems: when the airflow passes through the evaporator, the airflow is obstructed, which makes the flow rate very slow, resulting in poor heat exchange effect. As a result, a lot of copper tubes and fins need to be added to the evaporator, which not only increases the wind resistance but also greatly increases the manufacturing cost of the air conditioner indoor unit. Summary of the Invention

[0004] The problem solved by this invention is to provide an indoor unit with a simple structure that allows airflow to fully receive heat exchange.

[0005] To address the aforementioned problems, the present invention provides an indoor unit, comprising: a housing having an air inlet and an air outlet; a cross-flow fan having an air duct within the housing and having cross-flow fan blades; and a first heat exchange component having an airflow space within the cross-flow fan and having the first heat exchange component in contact with the cross-flow fan blades; wherein, when the cross-flow fan rotates, the cross-flow fan drives the first heat exchange component to rotate.

[0006] Compared with existing technologies, the technical effects achieved by this solution are as follows: Traditional cross-flow fans have a hollow interior, which wastes space and can cause airflow vortices during operation, resulting in energy loss and increased noise. This solution, by utilizing the internal space of the cross-flow fan (specifically, housing the first heat exchange component), reduces the space needed to accommodate airflow, effectively solving the problems of airflow vortices and noise. Furthermore, because the first heat exchange component contacts the cross-flow fan blades, it directly transfers heat to the blades, which then transfer heat to the airflow during rotation and guide it out into the indoor environment. In other words, the combination of the cross-flow fan and the first heat exchange component replaces the traditional combination of the cross-flow fan and evaporator in the indoor unit. This shortens the overall length of the duct, resulting in a more compact air conditioner and reduced costs.

[0007] In one embodiment of the present invention, the first heat exchange component is disposed at one end of the cross-flow fan blade near the airflow space, and the first heat exchange component is in contact with that end of the cross-flow fan blade.

[0008] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: Considering the rotation process of the cross-flow fan, it can be understood that since the first heat exchange component is set in the airflow space, as the cross-flow fan rotates, the refrigerant inside the first heat exchange component is distributed on the inner wall of the first heat exchange component under centrifugal force. Combined with the connection relationship between the first heat exchange component and the cross-flow fan blades, the refrigerant energy can be smoothly transferred to the surface of the cross-flow fan blades, thereby further improving the heat exchange efficiency between the airflow in contact with it.

[0009] In one embodiment of the present invention, the first heat exchange component is distributed along the axial direction of the cross-flow fan, and the first heat exchange component forms a total refrigerant inlet and a total refrigerant outlet at opposite ends of the cross-flow fan.

[0010] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: Generally, the axial length of a cross-flow fan is longer than its radial diameter. Therefore, when the first heat exchange component is distributed along the axial direction of the cross-flow fan and is adapted to the axial length of the cross-flow fan, all the cross-flow fan blades arranged along the axial direction of the cross-flow fan can come into contact with the first heat exchange component. This allows each cross-flow fan blade to participate in the heat exchange process with the airflow, thereby improving the overall heat exchange efficiency of the air conditioner.

[0011] In one embodiment of the present invention, the first heat exchange assembly includes: a plurality of heat exchange pipes circumferentially distributed around the axis of the cross-flow fan; and each of the heat exchange pipes forms a first refrigerant inlet and a first refrigerant outlet at opposite ends of the cross-flow fan; wherein the plurality of first refrigerant inlets are connected to the total refrigerant inlet; and the plurality of first refrigerant outlets are connected to the total refrigerant outlet.

[0012] Compared with existing technologies, the technical effects achieved by this solution are as follows: During normal operation of the indoor unit, the cross-flow fan rotates within the casing. Therefore, to ensure the refrigerant inside the first heat exchange component smoothly participates in the circulation process and is not affected by the rotation of the cross-flow fan, the total refrigerant inlet and outlet are located at the corresponding center positions at both ends of the cross-flow fan. This ensures that the duct ports of the refrigerant pipes connecting the first heat exchange component are also at their respective center positions. This prevents refrigerant leaks caused by the eccentric setting of the duct ports during fan rotation, which would otherwise place the entire refrigerant circulation pipeline in a dynamic environment.

[0013] In one embodiment of the present invention, the cross-flow fan is provided with bearing sleeves at the ends corresponding to the refrigerant main outlet and the refrigerant main inlet; the indoor unit includes: a bearing structure housed within the corresponding bearing sleeve; a support pipe, one end of which is inserted into the inner ring of the corresponding bearing structure, and the other end of which is fixedly connected to the housing; wherein the refrigerant passes sequentially through the support pipe, the refrigerant main inlet, and the refrigerant main outlet.

[0014] Compared with existing technologies, the technical effects achieved by this solution are as follows: During normal operation of the indoor unit, the cross-flow fan rotates inside the casing. Therefore, in order to ensure that the refrigerant inside the first heat exchange component can smoothly participate in the circulation process and avoid being affected by the rotation of the cross-flow fan, the total refrigerant inlet and the total refrigerant outlet can be located at the corresponding center positions at both ends of the cross-flow fan. This ensures that the duct port of the refrigerant pipeline used to connect the first heat exchange component is also at the corresponding center position, preventing refrigerant leakage accidents from occurring during the rotation of the cross-flow fan due to the eccentric setting of the duct port, which would otherwise cause the entire refrigerant circulation pipeline to be in a dynamic environment. This also avoids the formation of multiple openings at the corresponding ends of the cross-flow fan for multiple refrigerant inlets and outlets. On the one hand, this would require multiple external pipes to connect with each one, increasing the space occupied by the duct and reducing the space available for airflow. It would also increase the obstruction to airflow and reduce the airflow velocity. On the other hand, it would also easily cause the pipes used to connect the first refrigerant inlets or outlets to become entangled or twisted and damaged as the cross-flow fan rotates, which would be detrimental to the normal circulation of refrigerant.

[0015] In one embodiment of the present invention, it further includes: a transmission assembly disposed at one end of the cross-flow fan; a drive assembly disposed within the housing, and the drive assembly being driven connected to the transmission assembly; wherein the drive assembly drives the cross-flow fan to rotate by being driven connected to the transmission assembly.

[0016] In one embodiment of the present invention, the transmission assembly includes: a first gear fixedly disposed at one end of the cross-flow fan; and a second gear cooperatingly connected to the output shaft of the drive assembly.

[0017] Compared with existing technologies, the technical effect achieved by adopting this technical solution is that it enables the cross-flow fan to operate more stably and reliably.

[0018] In one embodiment of the present invention, the invention includes: a second heat exchange component disposed within the air duct, wherein the second heat exchange component is located between the cross-flow fan and the air inlet; and / or, a third heat exchange component disposed within the air duct, wherein the third heat exchange component is located between the cross-flow fan and the air outlet.

[0019] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by adding heat exchange components in the air duct, such as adding a second heat exchange component and / or a third heat exchange component, the airflow entering the air duct can undergo multiple heat exchanges, so as to ensure that the temperature of the airflow discharged from the air outlet is closer to the temperature set by the air conditioner, thereby bringing a more comfortable experience to the user.

[0020] In one embodiment of the present invention, the cross-flow fan blade is made of metal or ceramic.

[0021] Compared to existing technologies, the technical advantages of this solution are as follows: Since the cross-flow fan blades need to exchange heat with the airflow, good temperature conductivity is required to improve the efficiency of this heat exchange. For example, the cross-flow fan blades can be made of metal. Considering the environmental characteristics of the cross-flow fan blades, in addition to the aforementioned good temperature conductivity, they also need to meet the requirements of low-temperature and high-temperature resistance to accommodate the indoor unit's cooling or heating modes. Therefore, stainless steel can be selected as the material for the cross-flow fan blades.

[0022] On the other hand, the present invention also provides an air conditioner, comprising: an indoor unit as described in any of the above examples; and an outdoor unit connected in cooperation with the indoor unit.

[0023] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: it can achieve the technical effects corresponding to any of the above technical solutions, which will not be elaborated here.

[0024] By adopting the technical solution of the present invention, the following technical effects can be achieved:

[0025] (1) By making reasonable use of the internal space of the cross-flow fan, that is, by setting the first heat exchange component therein, the space inside the cross-flow fan used to accommodate airflow is reduced, thereby effectively solving the aforementioned problems of airflow vortex and noise. In addition, since the first heat exchange component is in contact with the cross-flow fan blades, the first heat exchange component can directly transfer the temperature to the cross-flow fan blades, so that the cross-flow fan blades transfer the temperature to the airflow in contact with them during rotation, and guide the airflow out to the indoor environment. In other words, the combination of the cross-flow fan and the first heat exchange component replaces the combination of the cross-flow fan and the evaporator in the traditional indoor unit. In comparison, the overall length of the air duct can be shortened, thereby making the air conditioner smaller and saving costs.

[0026] (2) In conjunction with the rotation process of the cross-flow fan, it can be understood that since the first heat exchange component is set in the airflow space, as the cross-flow fan rotates, the refrigerant inside the first heat exchange component is distributed on the inner wall of the first heat exchange component under centrifugal action. Combined with the connection relationship between the first heat exchange component and the cross-flow fan blade, the refrigerant energy can be smoothly transferred to the surface of the cross-flow fan blade, thereby further improving the heat exchange efficiency between the airflow in contact with it.

[0027] (3) By adding heat exchange components in the air duct, such as adding a second heat exchange component and / or a third heat exchange component, the airflow entering the air duct can undergo multiple heat exchange processes to ensure that the temperature of the airflow discharged from the air outlet is closer to the temperature set by the air conditioner, thereby bringing a more comfortable experience to the user. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the connection between a cross-flow fan and a first heat exchange component according to Embodiment 1 of the present invention.

[0029] Figure 2 for Figure 1 A structural diagram from another perspective.

[0030] Figure 3 for Figure 2 Enlarged view in the AA direction.

[0031] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0032] Figure 5 for Figure 1 A structural diagram from another perspective.

[0033] Figure 6 for Figure 5 A cross-sectional view along the CC direction.

[0034] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10-Cross-flow fan; 11-Cross-flow fan blade; 111-First end; 112-Second end; 12-Airflow space; 20-First heat exchange assembly; 21-Heat exchange pipeline; 22-Refrigerant main inlet; 23-Refrigerant main outlet; 24-First refrigerant outlet; 25-First refrigerant inlet; 30-Transmission assembly; 31-First gear; 32-Second gear; 40-Drive assembly; 51-Bearing sleeve; 52-Support pipeline. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Example 1:

[0039] See Figure 1 This is a schematic diagram illustrating the connection between the cross-flow fan 10 and the first heat exchange component 20 in an indoor unit according to Embodiment 1 of the present invention. (Combined with...) Figures 2-7 The indoor unit includes, for example, a housing, a cross-flow fan 10, and a first heat exchange component 20. The housing has an air inlet and an air outlet, the cross-flow fan 10 is housed in an air duct within the housing, and the cross-flow fan 10 has cross-flow fan blades 11; the first heat exchange component 20 is housed in the airflow space 12 of the cross-flow fan 10, and the first heat exchange component 20 is in contact with the cross-flow fan blades; wherein, when the cross-flow fan 10 rotates, the cross-flow fan 10 drives the first heat exchange component 20 to rotate.

[0040] Specifically, the air inlet, air duct, airflow space 12 and air outlet are connected, and the cross-flow fan 10 is sandwiched between the air inlet and the air outlet. According to the actual process of airflow through the indoor unit, for example, the airflow first enters the air duct through the air inlet, then enters the airflow space 12 through the end of the cross-flow fan 10 near the air inlet, and then comes out of the airflow space 12 from the end of the cross-flow fan 10 away from the air inlet. Finally, after the heat exchange effect of the first heat exchange component 20, the heat-exchanged airflow is blown out of the air outlet to the indoor environment.

[0041] In a specific example, the cross-flow fan 10 is rotated in a forward direction, which in turn drives the cross-flow fan blades 11 to rotate in a forward direction as well, so that the airflow can be smoothly discharged from the air outlet into the indoor environment. Commonly, the casing has a volute-shaped inner cavity. Combined with the arrangement of the cross-flow fan 10 within the casing, such as aligning the volute tongue of the inner cavity with the direction of the casing at the air outlet, the cross-flow fan 10 allows the airflow to be smoothly discharged from the air outlet during rotation. This avoids the situation where the internal cavity of the casing has sharp edges or irregularities, which would cause most of the airflow after heat exchange to remain in the air duct and fail to be discharged from the air outlet, thus reducing airflow efficiency. Furthermore, based on the content of this technical solution, it can be understood that the traditional cross-flow fan 10 has a hollow interior. On the one hand, this results in a waste of space in forming the hollow structure; on the other hand, it easily causes airflow vortices to be generated inside the cross-flow fan 10 during operation, losing some airflow energy and even increasing noise.

[0042] Therefore, by making reasonable use of the internal space of the cross-flow fan 10, that is, by setting the first heat exchange component 20 therein, the space inside the cross-flow fan 10 used to accommodate airflow is reduced, thereby effectively solving the problems of generating airflow vortices and noise mentioned above.

[0043] Furthermore, in wall-mounted indoor units, it is common to find both an evaporator and a cross-flow fan 10 inside. The cross-flow fan 10 primarily guides airflow from the interior of the indoor unit to the indoor environment, while heat exchange occurs through the evaporator. However, in this technical solution, because the first heat exchange component 20 contacts the cross-flow fan 11, the first heat exchange component 20 directly transfers temperature to the cross-flow fan 11. This allows the cross-flow fan 11 to transfer temperature to the airflow it contacts during rotation, and then guide this airflow out to the indoor environment. In other words, the combination of the cross-flow fan 10 and the first heat exchange component 20 replaces the traditional combination of the cross-flow fan 10 and evaporator in an indoor unit. This shortens the overall length of the air duct, resulting in a more compact air conditioner and reduced costs.

[0044] It should be noted that although there are technical solutions in the related art that involve setting a heat exchanger inside the cross-flow fan 10, the difference between the technical solution of this invention and the present invention is that the first heat exchange component 20 in the present invention is in contact with the cross-flow fan blade 11. That is, when the first heat exchange component 20 is filled with refrigerant, the energy carried by the refrigerant can be directly transferred to the corresponding cross-flow fan blade 11 by the first heat exchange component 20. On the one hand, this improves the utilization rate of refrigerant energy and reduces energy loss; on the other hand, since the first heat exchange component 20 rotates synchronously with the cross-flow fan 10, it enables sufficient heat exchange of the airflow entering the air duct, so that the temperature of the air blown out from the air outlet remains consistent, thereby improving the user's comfort.

[0045] Preferably, the first heat exchange component 20 is located at one end of the cross-flow fan 10 near the airflow space 12, and the first heat exchange component 20 is in contact with that end of the cross-flow fan blade 11. Specifically, the cross-flow fan blade 11 has a first end 111 and a second end 112 arranged opposite each other, with the first end 111 and the second end 112 sequentially arranged from the center of the airflow space 12 toward the cross-flow fan blade 11. Thus, the first heat exchange component 20 is in contact with the first end 111. Considering the rotation process of the cross-flow fan 10, it can be understood that since the first heat exchange component 20 is located within the airflow space 12, as the cross-flow fan 10 rotates, the refrigerant inside the first heat exchange component 20 is distributed on the inner wall of the first heat exchange component 20 under centrifugal force. Combined with the connection relationship between the first heat exchange component 20 and the cross-flow fan blade 11, the refrigerant energy can be smoothly transferred to the surface of the cross-flow fan blade 11, thereby further improving the heat exchange efficiency between the airflow in contact with it.

[0046] Preferably, the first heat exchange component 20 is distributed along the axial direction of the cross-flow fan 10, and the first heat exchange component 20 forms a total refrigerant inlet 22 and a total refrigerant outlet 23 at opposite ends of the cross-flow fan 10.

[0047] In a specific example, the axial length of the cross-flow fan 10 is longer than its radial diameter. Thus, when the first heat exchange component 20 is distributed along the axial direction of the cross-flow fan 10 and adapted to the axial length of the cross-flow fan 10, the cross-flow fan blades 11 arranged along the axial direction of the cross-flow fan 10 can all come into contact with the first heat exchange component 20. This allows each cross-flow fan blade 11 to participate in the heat exchange process with the airflow, thereby improving the overall heat exchange efficiency of the air conditioner.

[0048] Preferably, the first heat exchange assembly 20 includes, for example, a plurality of heat exchange pipes 21. Each heat exchange pipe 21 is circumferentially distributed around the axis of the cross-flow fan 10, and each heat exchange pipe 21 forms a first refrigerant inlet 25 and a first refrigerant outlet 24 at opposite ends of the cross-flow fan 10; wherein, all the first refrigerant inlets 25 are connected to the total refrigerant inlet 22; similarly, all the first refrigerant outlets 24 are connected to the total refrigerant outlet 23.

[0049] In a specific example, during normal operation of the indoor unit, the cross-flow fan 10 rotates inside the casing. To ensure that the refrigerant inside the first heat exchange component 20 can smoothly participate in the circulation process and avoid being affected by the rotation of the cross-flow fan 10, the refrigerant inlet 22 and the refrigerant outlet 23 can be located at the corresponding center positions at both ends of the cross-flow fan 10. This ensures that the duct port of the refrigerant pipe used to connect the first heat exchange component 20 is also at the corresponding center position, preventing the entire refrigerant circulation pipeline from being in a dynamic environment due to the eccentric setting of the duct port during the rotation of the cross-flow fan 10, which could easily cause refrigerant leakage. This also avoids the formation of multiple openings at the corresponding ends of the cross-flow fan 10 for multiple first refrigerant inlets 25 and multiple first refrigerant outlets 24. On the one hand, this would require multiple external pipes to connect with each one, increasing the space occupied by the air duct and reducing the space available for airflow. At the same time, it would also increase the obstruction to airflow and reduce the airflow velocity. On the other hand, it would also easily cause the pipes used to connect the first refrigerant inlets 25 or the first refrigerant outlets 24 to become entangled or twisted and damaged as the cross-flow fan 10 rotates, which would be detrimental to the normal circulation of refrigerant.

[0050] Preferably, the cross-flow fan 10 has bearing sleeves 51 at the ends corresponding to the refrigerant main outlet 23 and the refrigerant main inlet 22; the indoor unit includes, for example, a bearing structure and a support pipe 52. The bearing structure is housed within the corresponding bearing sleeve 51; one end of the support pipe 52 is inserted into the inner ring of the corresponding bearing structure, and the other end is fixedly connected to the housing. The refrigerant passes sequentially through the support pipe 52, the refrigerant main inlet 22, and the refrigerant main outlet 23.

[0051] In a specific example, the first heat exchange component 20 includes, for instance, multiple copper pipes through which refrigerant can flow. Each copper pipe is parallel to the others and arranged in a manner consistent with the cross-flow fan blades 11 connected to it. To ensure stable rotation of the cross-flow fan 10, each copper pipe is evenly spaced around the rotation axis of the cross-flow fan 10. Furthermore, to ensure the refrigerant remains sealed during circulation, the support pipe 52 is connected to the inner ring of the bearing structure, and the support pipe 52 is connected to the heat exchange pipe 21. During the rotation of the cross-flow fan 10, because the bearing structure is housed within the bearing sleeve 51, the cross-flow fan 10 drives the outer ring of the bearing structure to rotate, while ensuring that the inner ring of the bearing structure and the connected support pipe 52 remain fixed.

[0052] Preferably, the indoor unit further includes, for example, a transmission assembly 30 and a drive assembly 40. The transmission assembly 30 is disposed at one end of the cross-flow fan 10; the drive assembly 40 is disposed inside the housing and is drivenly connected to the transmission assembly 30; wherein, the drive assembly 40 drives the cross-flow fan 10 to rotate through the drive connection with the transmission assembly 30.

[0053] Preferably, the transmission assembly 30 includes, for example, a first gear 31 and a second gear 32. The first gear 31 is fixedly disposed at one end of the cross-flow fan 10; the second gear 32 is connected to the output shaft of the drive assembly 40.

[0054] Preferably, the indoor unit includes, for example, a second heat exchange component disposed within the air duct and located between the cross-flow fan 10 and the air inlet; and / or, the indoor unit includes, for example, a third heat exchange component disposed within the air duct and located between the cross-flow fan 10 and the air outlet.

[0055] Preferably, the cross-flow fan blade 11 is made of, for example, metal or ceramic. Since the cross-flow fan blade 11 needs to exchange heat with the airflow, it requires good temperature conductivity to improve heat exchange efficiency. For example, the cross-flow fan blade 11 can be made of metal. Considering the environmental characteristics of the environment in which the cross-flow fan blade 11 operates, in addition to the aforementioned good temperature conductivity, it also needs to meet the requirements of low-temperature and high-temperature resistance to correspond to the indoor unit's cooling or heating operation. Therefore, stainless steel can be selected as the material for the cross-flow fan blade 11.

[0056] In a specific example, the indoor unit may include a second heat exchange component. The airflow entering the indoor unit's duct then passes through both the second and first heat exchange components 20, further improving the indoor unit's heat exchange efficiency. The second heat exchange component may be, for example, an evaporator. Considering the presence of the first heat exchange component 20 in the indoor unit, the number of fins and copper tubes on the evaporator can be appropriately reduced to increase the overall airflow velocity. This reduces airflow obstruction, allowing the airflow to maintain a good rate as it enters the airflow space 12; it also saves costs.

[0057] Of course, in another specific instance, the indoor unit may also include a second heat exchange component and a third heat exchange component to further improve the heat exchange efficiency of the air conditioner, which will not be elaborated here.

[0058] Example 2:

[0059] Embodiment 2 of the present invention also provides an air conditioner. The air conditioner includes, for example, an indoor unit and an outdoor unit as described in Embodiment 1 above. The outdoor unit is connected to the indoor unit to form a complete refrigerant cycle.

[0060] Specifically, this embodiment can achieve the technical effects corresponding to any of the technical solutions in Embodiment 1 above, which will not be repeated here.

[0061] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An indoor unit, characterized in that, include: The casing is equipped with an air inlet and an air outlet; A cross-flow fan (10) is provided in the air duct of the housing, and the cross-flow fan (10) is provided with cross-flow fan blades (11). The first heat exchange component (20) is disposed in the airflow space (12) of the cross-flow fan (10), and the first heat exchange component (20) is in contact with the cross-flow fan blade (11); When the cross-flow fan (10) rotates, the cross-flow fan (10) drives the first heat exchange component (20) to rotate. The first heat exchange component (20) is located at one end of the cross-flow fan blade (11) near the airflow space (12), and the first heat exchange component (20) is in contact with that end of the cross-flow fan blade (11).

2. The indoor unit according to claim 1, characterized in that, The first heat exchange component (20) is distributed along the axial direction of the cross-flow fan (10), and the first heat exchange component (20) forms a total refrigerant inlet (22) and a total refrigerant outlet (23) at opposite ends of the cross-flow fan (10).

3. The indoor unit according to claim 2, characterized in that, The first heat exchange assembly (20) includes: Multiple heat exchange pipes (21) are circumferentially distributed around the axis of the cross-flow fan (10); and each heat exchange pipe (21) forms a first refrigerant inlet (25) and a first refrigerant outlet (24) at opposite ends of the cross-flow fan (10). The plurality of first refrigerant inlets (25) are connected to the total refrigerant inlet (22); the plurality of first refrigerant outlets (24) are connected to the total refrigerant outlet (23).

4. The indoor unit according to claim 2, characterized in that, The cross-flow fan (10) is provided with bearing sleeves (51) at the ends corresponding to the refrigerant main outlet (23) and the refrigerant main inlet (22); the indoor unit includes: The bearing structure is internally disposed in the corresponding bearing sleeve (51). The support pipe (52) has one end inserted into the inner ring of the corresponding bearing structure, and the other end fixedly connected to the housing. The refrigerant passes through the support pipe (52), the refrigerant inlet (22), and the refrigerant outlet (23) in sequence.

5. The indoor unit according to claim 4, characterized in that, Also includes: A transmission assembly (30) is located at one end of the cross-flow fan (10); A drive assembly (40) is disposed within the housing, and the drive assembly (40) is drive-connected to the transmission assembly (30); The drive assembly (40) drives the cross-flow fan (10) to rotate by being connected to the transmission assembly (30).

6. The indoor unit according to claim 5, characterized in that, The transmission assembly (30) includes: The first gear (31) is fixedly disposed at one end of the cross-flow fan (10); The second gear (32) is connected to the output shaft of the drive assembly (40).

7. The indoor unit according to any one of claims 1-6, characterized in that, include: A second heat exchange component is disposed within the air duct, and the second heat exchange component is located between the cross-flow fan (10) and the air inlet; and / or, The third heat exchange component is disposed within the air duct and is located between the cross-flow fan (10) and the air outlet.

8. The indoor unit according to claim 1, characterized in that, The cross-flow fan blade (11) is made of metal or ceramic.

9. An air conditioner, characterized in that, include: The indoor unit as described in any one of claims 1-8; The outdoor unit is connected in conjunction with the indoor unit.

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