Indoor units and fresh air conditioning

Abstract

This application relates to an indoor unit and a fresh air conditioner, belonging to the field of air conditioning technology. It aims to solve the problem of significant turbulence and noise when fresh air and return air mix in an indoor unit. The indoor unit includes a casing, a heat exchanger, and an air duct component. The casing has a first air outlet along a first direction, and the heat exchanger and air duct component are disposed within the casing. The air duct component and the first air outlet are located on opposite sides of the heat exchanger along the first direction. A fresh air duct extending along a second direction is provided within the air duct component, and a second air outlet is provided along the first direction towards the first air outlet. The second air outlet communicates with the fresh air duct, and there is an angle between the first direction and the second direction.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor unit and a fresh air conditioner. Background Technology

[0002] With the continuous development of air conditioning fresh air technology, the application of fresh air modules in air conditioners is becoming increasingly widespread, significantly improving user experience and indoor comfort. Currently, air conditioning fresh air systems mainly employ two methods: one is to completely separate the fresh air duct from the indoor unit's duct, with fresh air directly delivered into the room through an independent air vent; the other is to introduce fresh air upstream of the indoor heat exchanger, mix it with return air, and then deliver it out after temperature adjustment by the heat exchanger. However, both methods have significant drawbacks.

[0003] For direct air supply, since the fresh air enters the room without temperature regulation or has a temperature difference with the return air, it can easily lead to uneven temperature distribution of the supply airflow, affecting the uniformity of the indoor temperature field. For mixed air supply, due to limitations in existing structural design, when fresh and return air mix in the indoor unit, the direction of the fresh air outlet usually forms a large angle or even a perpendicular relationship with the direction of the return airflow. This airflow convergence generates significant turbulence, causing not only considerable airflow noise but also a significant reduction in outlet air velocity and airflow volume. Utility Model Content

[0004] This application provides an indoor unit and a fresh air conditioner to solve the problem of large turbulence and noise when fresh air and return air are mixed in the indoor unit.

[0005] In a first aspect, some embodiments of this application provide an indoor unit, including a housing, a heat exchanger, and an air duct component. The housing has a first air outlet along a first direction, and the heat exchanger and air duct component are disposed within the housing. The air duct component and the first air outlet are located on opposite sides of the heat exchanger along the first direction. The air duct component has a fresh air duct extending along a second direction, and the air duct component has a second air outlet along the first direction towards the first air outlet. The second air outlet communicates with the fresh air duct, and there is an angle between the first direction and the second direction.

[0006] In one optional embodiment, the number of second air outlets is at least two and they are spaced apart along a second direction. The ductwork also includes a fresh air inlet communicating with the fresh air duct. The indoor unit also includes a first air valve, which is disposed within the fresh air duct and connected to the ductwork. The first air valve is located between two adjacent second air outlets along the second direction. The first air valve is configured to have an open state and a closed state. When the first air valve is in the closed state, the second air outlet located between the fresh air inlet and the first air valve is connected to the fresh air inlet along the second direction.

[0007] In one alternative implementation, the indoor unit further includes a second air valve located at the fresh air inlet and connected to the ductwork or housing, for opening or closing the fresh air inlet.

[0008] In one optional embodiment, the second air valve is configured to include at least a first open state, a second open state, and a closed state. When the second air valve is in the first open state, the fresh air inlet is fully open. When the second air valve is in the second open state, the fresh air inlet is partially open. When the second air valve is in the closed state, the fresh air inlet is closed.

[0009] In one optional embodiment, the duct component has a fresh air inlet at one end along the second direction. Inside the fresh air duct, the duct component has a boss facing the fresh air inlet on the side along the second direction opposite to the fresh air inlet, and an arc-shaped guide portion is provided between the inner wall of the duct component and the boss.

[0010] In one alternative embodiment, the second air outlet includes a first notch and a second notch. The ductwork component has an air outlet baffle at the second air outlet to divide the second air outlet into the first notch and the second notch.

[0011] In one optional embodiment, the indoor unit further includes a first air guide plate and a second air guide plate. The first air guide plate is rotatably connected to the air duct component and is used to adjust the air outlet direction at the first notch. The second air guide plate is rotatably connected to the air duct component and is used to adjust the air outlet direction at the second notch. The first and second air guide plates are configured to open or close the first and second notches.

[0012] In an optional embodiment, at a second air outlet, a first notch and a second notch are spaced apart along a third direction, with the first direction, the second direction, and the third direction forming an angle with each other. The first notch is located above the second notch along the third direction, when the first air guide plate rotates to a preset position. If the temperature difference between the fresh air at the fresh air inlet and the preset temperature is greater than a first preset value, the first air guide plate is controlled to continue rotating from the closed state to the open state to the preset position. The angle at which the first air guide plate continues to rotate from the preset position is proportional to the value of the first temperature difference. The first air guide plate rotates along an axis parallel to the second direction, and the preset position is the position where the first air guide plate rotates to an angle perpendicular to the third direction to open the first notch.

[0013] In one optional embodiment, a partition plate is provided inside the housing, which divides the housing into an air inlet chamber and an air outlet chamber along a first direction. The partition plate, air duct components, a heat exchanger, and an air outlet are sequentially distributed within the air outlet chamber along the first direction. The air duct components are located within the air outlet chamber and are at least connected to the partition plate.

[0014] In one optional embodiment, the indoor unit further includes an indoor fan and a third air valve. The indoor fan is disposed within the air inlet cavity, and the partition has a ventilation opening connecting the air inlet cavity and the air outlet cavity, with the air outlet side of the indoor fan facing the ventilation opening. The ductwork component has a third air outlet connecting to the air outlet cavity, and the third air valve is connected to the ductwork component for opening or closing the third air outlet.

[0015] In one alternative embodiment, the indoor fan is a centrifugal fan, and the indoor unit also includes a third guide vane. Along the second direction, third guide vanes are respectively provided on both sides of a third air outlet, and the air inlet of the indoor fan is located between the two third guide vanes.

[0016] In an optional embodiment, the third guide vane is an arc-shaped plate, and the axis of the third guide vane is parallel to a third direction. Between two third guide vanes connected to the same third air outlet, the axis of the third guide vane is located between the two third guide vanes along a second direction. The first direction, the second direction, and the third direction form an angle with each other.

[0017] Secondly, some embodiments of this application provide a fresh air conditioning system, including the indoor unit mentioned in the previous aspect.

[0018] The technical solutions provided by the embodiments of this application have at least the following beneficial effects:

[0019] Because there is an angle between the first and second directions, that is, the length direction of the fresh air duct inside the air duct component is not the same as the opening direction of the second air outlet. Taking the first direction as the front-to-back direction and the second direction as the left-to-right direction as an example, the air duct component and the fresh air duct extend in the left-to-right direction. A second air outlet is opened on the front side of the air duct component to connect with the fresh air duct, so that the fresh air supplied by the fresh air duct can be blown out towards the heat exchanger and the first air outlet through the second air outlet.

[0020] The fresh airflow enters the fresh air duct along the second direction and changes direction at the second air outlet, allowing the fresh air blown out from the second air outlet to reach the heat exchanger and the first air outlet. As the fresh airflow reaches the heat exchanger and the first air outlet, the return airflow inside the casing also flows along the first direction towards the heat exchanger and the first air outlet. The fresh airflow and return airflow flow in the aforementioned mixing region in the same direction or at a small angle to form a gradual convergence, avoiding direct collision between the two airflows. This mixing method reduces the vortex region generated by airflow collision, which helps reduce aerodynamic noise and improves the mixing degree of the fresh airflow and return airflow, resulting in a more uniform temperature field distribution in the airflow blown out from the first air outlet. Furthermore, because the fresh airflow and return airflow flow in the same direction or at a small angle, their velocities can partially overlap during mixing, resulting in a higher velocity of the mixed airflow when it is delivered from the first air outlet, which helps increase the air volume. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 A cross-sectional view of an indoor unit provided in an embodiment of this application;

[0025] Figure 2 for Figure 1 The indoor unit shown is a cross-sectional view from the second angle;

[0026] Figure 3 for Figure 1 A three-dimensional structural schematic diagram of the air duct component shown in the figure;

[0027] Figure 4 for Figure 3 A schematic diagram of the first type of internal structure of the air duct component shown;

[0028] Figure 5 for Figure 3A schematic diagram of the second type of internal structure of the air duct component shown;

[0029] Figure 6 for Figure 3 A schematic diagram of the third type of internal structure of the air duct component shown;

[0030] Figure 7 for Figure 3 The duct component shown is in a first cross-sectional view in a plane perpendicular to the second direction;

[0031] Figure 8 for Figure 1 A magnified view of a portion of point A in the middle;

[0032] Figure 9 This is a partially enlarged schematic diagram of the other end of the air duct component shown in Figure 6, opposite to the fresh air inlet.

[0033] Figure 10 for Figure 1 The indoor unit shown is a cross-sectional view from the third angle;

[0034] Figure 11 for Figure 3 The duct component shown is in a second cross-sectional view in a plane perpendicular to the second direction;

[0035] Figure 12 for Figure 3 The diagram shows a three-dimensional structure of the air duct component on the other side.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Indoor unit;

[0038] 10. Housing; 11. First air outlet; 12. Middle partition; 13. Air outlet cavity; 14. Air inlet cavity; 15. Ventilation gap;

[0039] 20. Indoor fan;

[0040] 30. Heat exchanger;

[0041] 40. Fresh air assembly; 41. Air duct component; 411. Fresh air duct; 412. Second air outlet; 4121. First notch; 4122. Second notch; 413. Fresh air inlet; 414. Boss; 415. Arc-shaped air guide; 416. Third air outlet; 42. Fresh air fan; 43. First air valve; 44. Second air valve; 441. First damper; 442. Second damper; 45. Air outlet baffle; 461. First air guide plate; 462. Second air guide plate; 47. Third air valve; 48. Third air guide plate;

[0042] 50. Fresh air fan. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following provides numerous different embodiments or examples for implementing various structures of this application. To simplify this application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0045] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0046] Figure 1 This is a cross-sectional view of an indoor unit provided in an embodiment of this application. Figure 2 for Figure 1 The indoor unit shown is a cross-sectional view from the second angle. Figure 3 for Figure 1 The diagram shows a three-dimensional structural schematic of the air duct component shown. Figure 4 for Figure 3 The diagram shows the first internal structure of the air duct component. Figure 5 for Figure 3 The diagram shows the second type of internal structure of the air duct component. Figure 6 for Figure 3The diagram shows the third type of internal structure of the air duct component. Figure 7 for Figure 3 The duct component shown is in a first cross-sectional view in a plane perpendicular to the second direction. Figure 8 for Figure 1 A magnified view of a portion of point A in the middle. Figure 9 This is a partially enlarged schematic diagram of the ductwork component shown in Figure 6, opposite to the fresh air inlet. Figure 10 for Figure 1 The indoor unit shown is a cross-sectional view from the third angle. Figure 11 for Figure 3 The ductwork shown is in a second cross-sectional view in a plane perpendicular to the second direction. Figure 12 for Figure 3 The diagram shows a three-dimensional structure of the air duct component on the other side.

[0047] With the continuous development of air conditioning fresh air technology, the application of fresh air modules in air conditioners is becoming increasingly widespread, significantly improving user experience and indoor comfort. Currently, air conditioning fresh air systems mainly employ two methods: one is to completely separate the fresh air duct from the indoor unit's duct, with fresh air directly delivered into the room through an independent air vent; the other is to introduce fresh air upstream of the indoor heat exchanger, mix it with return air, and then deliver it out after temperature adjustment by the heat exchanger. However, both methods have significant drawbacks.

[0048] For direct air supply, since the fresh air enters the room without temperature regulation or there is a temperature difference between it and the return air, it is easy to cause uneven temperature distribution of the supply airflow, affecting the uniformity of the indoor temperature field.

[0049] For mixed air supply systems, due to limitations in existing structural design, when fresh air and return air mix in the indoor unit, the outlet direction of the fresh air usually forms a large angle or even a perpendicular relationship with the airflow direction of the return air, resulting in directional conflict between the fresh air and indoor return air during the mixing process. When the fresh air outlet forms a spatial angle with the main air duct, the two airflows generate a shearing effect in the convergence area, leading to a significant increase in turbulence intensity. This flow instability not only causes distortion of the local pressure field but also triggers an abnormal increase in the high-frequency components of the aerodynamic noise spectrum, while reducing the axial momentum transfer efficiency of the airflow within the main air duct. In other words, it not only causes significant airflow noise but also significantly reduces the outlet air velocity and airflow volume.

[0050] Based on this, please refer to Figures 1 to 12 This application provides an indoor unit and a fresh air conditioner to solve the problem of large turbulence and noise when fresh air and return air are mixed in the indoor unit.

[0051] On the one hand, such as Figure 1As shown, this application embodiment provides an indoor unit 100, including a housing 10, a heat exchanger 30, and a fresh air assembly 40. The fresh air assembly 40 includes an air duct component 41, and other components of the fresh air assembly 40 (including the air duct component 41) can also be considered as part of the indoor unit 100.

[0052] like Figure 1 and Figure 2 As shown, the housing 10 has a first air outlet 11 along the first direction Y, the heat exchanger 30 and the air duct component 41 are disposed inside the housing 10, and the air duct component 41 and the first air outlet 11 are located on opposite sides of the heat exchanger 30 along the first direction Y.

[0053] Taking the case where the first air outlet 11 is provided on the front side of the housing 10 as an example, the corresponding first direction Y can be the front-back direction. That is, the air duct component 41, the heat exchanger 30 and the first air outlet 11 are distributed from back to front at intervals within the housing 10. The heat exchanger 30 and the air duct component 41 can be directly connected and fixed to the housing 10, or they can be connected and fixed to the housing 10 through brackets or other fixing components to form a stable structure.

[0054] Continue to refer to Figure 1 and Figure 2 The air duct component 41 is provided with a fresh air duct 411 extending along the second direction X, and the air duct component 41 is provided with a second air outlet 412 along the first direction Y toward the first air outlet 11. The second air outlet 412 is connected to the fresh air duct 411, and there is an angle between the first direction Y and the second direction X.

[0055] Because there is an angle between the first direction Y and the second direction X, that is, the length direction of the fresh air duct 411 inside the air duct component 41 is not the same as the opening direction of the second air outlet 412. Taking the first direction Y as the front-to-back direction and the second direction X as the left-to-right direction as an example, that is, the air duct component 41 and the fresh air duct 411 extend in the left-to-right direction. A second air outlet 412 is opened on the front side of the air duct component 41 to connect with the fresh air duct 411, so that the fresh air sent in by the fresh air duct 411 can be blown out towards the heat exchanger 30 and the first air outlet 11 through the second air outlet 412.

[0056] In other words, after the fresh airflow enters the fresh air duct 411 along the second direction X, it changes direction at the second air outlet 412, allowing the fresh air blown out of the second air outlet 412 to be directed towards the heat exchanger 30 and the first air outlet 11. During the process of the fresh airflow towards the heat exchanger 30 and the first air outlet 11, the return airflow inside the casing 10 also blows towards the heat exchanger 30 and the first air outlet 11 along the first direction. The fresh airflow and the return airflow flow in the aforementioned mixing region in the same direction or with a small angle to form a gradual convergence, avoiding direct collision between the two airflows. This mixing method reduces the vortex region generated by airflow collision, which helps reduce aerodynamic noise and improves the mixing degree of the fresh airflow and the return airflow, resulting in a more uniform temperature field distribution of the airflow blown out of the first air outlet 11. Furthermore, since the fresh air and return air flow have the same direction or a small angle, their velocities can partially overlap during the mixing process, resulting in a higher velocity of the mixed airflow when it is delivered from the first air outlet 11, which is beneficial for increasing the air volume.

[0057] At the air duct component 41, the number of second air outlets 412 can be set to one, which is simple in structure. Alternatively, the number of second air outlets 412 can also be set.

[0058] For example, such as Figure 3 and Figure 4 As shown, there are at least two second air outlets 412, which are distributed at intervals along the second direction X. The air duct component 41 is also provided with a fresh air inlet 413 that connects to the fresh air duct 411.

[0059] In this way, fresh air is introduced into the fresh air duct 411 through the fresh air inlet 413, and the fresh air airflow is blown out toward the heat exchanger 30 through at least two second air outlets 412 that are spaced apart along the second direction X. This helps to improve the uniformity of the distribution of the fresh air airflow in the second direction X, thereby improving the uniformity of the mixing between the fresh air airflow and the return airflow.

[0060] Since at least two second air outlets 412 are distributed at intervals along the length of the fresh air duct 411, that is, some second air outlets 412 are set close to the fresh air inlet 413, and the other second air outlets are set away from the fresh air inlet 413. Taking two second air outlets 412 as an example, along the second direction X, one second air outlet 412 is set close to the fresh air inlet 413, and the other second air outlet 412 is set away from the fresh air inlet. When the fresh air volume is small, most or all of the fresh air flow will flow out from the second air outlet 412 that is close to the fresh air inlet 413. This results in no fresh air flow or very little fresh air flow at the other second air outlet 412, which leads to the fresh air flow blowing out of the second air outlet 412 having a very low wind speed. The low wind speed is not conducive to the uniform mixing of the fresh air flow and the return air flow.

[0061] Based on this, refer to Figure 4 and Figure 5 The fresh air assembly 40 also includes a first air valve 43, which is disposed within the fresh air duct 411 and connected to the duct component 41. The first air valve 43 is located between two adjacent second air outlets 412 along the second direction X. The first air valve 43 is configured to have... Figure 5 The shown on state and Figure 4 The closed state is shown.

[0062] like Figure 3 and Figure 4 As shown, when the first air valve 43 is in the closed state, along the second direction X, the second air outlet 412 located between the fresh air inlet 413 and the first air valve 43 is connected to the fresh air inlet 413.

[0063] like Figure 3 and Figure 5 As shown, when the first air valve 43 is in the open state, all the second air outlets 412 are connected to the fresh air inlet.

[0064] Thus, taking the fresh air volume as an example, with levels ranging from low to high including first, second, third, and fourth settings, these represent low, medium, high, and ultra-high air volume, respectively. When the fresh air volume setting is low (such as first or second setting), the first air valve 43 is controlled to be in a position... Figure 4 The closed state shown closes part of the fresh air duct 411 and the second air outlet 412, allowing a smaller amount of fresh air to be blown out from part of the second air outlet 412. This helps to increase the air outlet speed of the fresh air, improves the mixing effect of the fresh air and return air, and allows more fresh air to flow to the heat exchanger at a higher speed for heat exchange, thereby improving the heat exchange effect and efficiency of the fresh air.

[0065] Correspondingly, when the fresh air volume setting is high (such as the third and fourth settings), the first air valve 43 is controlled to be in a certain position. Figure 5 The shown open state ensures that all fresh air ducts 411 and second air outlets 412 are in a conductive state. Because the fresh air volume is large at this time, even when flowing through longer fresh air ducts 411 and more second air outlets 412, the fresh airflow can still maintain a high wind speed, thus ensuring a better mixing effect between the fresh airflow and the return airflow, and improving the uniformity of the fresh airflow distribution in the second direction X.

[0066] It should be noted that within the fresh air duct 411, the first air valve 43 is configured to be rotatably connected to the duct component 41. That is, the first air valve 43 can be controlled by a drive motor to rotate and open or close the corresponding fresh air duct 411 and second air outlet 412. The first air valve 43 can be a single-piece damper structure, which is simple in structure. Alternatively, the first air valve 43 can also be a double-piece hinged door structure. In the process of rotating to open or close the fresh air duct 411, the hinged door structure of the first air valve 43 occupies less space, facilitating the flexible arrangement of other structural components.

[0067] Alternatively, the first air valve 43 can be configured to slide connected to the air duct component 41. For example, the air duct component 41 may have an air valve notch connecting to the fresh air duct 411, and the first air valve 43 may be located at the air valve notch. Driven by a drive motor or a telescopic air rod, the first air valve 43 may be inserted into the fresh air duct 411 through the air valve notch to block the fresh air duct 411. Alternatively, the first air valve 43 may be moved out of the fresh air duct 411 through the air valve notch to keep the fresh air duct 411 unobstructed.

[0068] In some embodiments, such as Figure 4 and Figure 5 As shown, the fresh air assembly 40 also includes a second air valve 44, which is located at the fresh air inlet 413 and connected to the air duct component 41 or the housing 10 (e.g., Figure 1 (As shown) Connection, used to open or close fresh air inlet 413.

[0069] The second air valve 44 refers to the damper structure installed at the fresh air inlet 413. Specifically, it can be a rotary damper or a sliding damper, and its opening and closing actions can be controlled by a motor drive or a pneumatic rod drive.

[0070] like Figure 4 and Figure 5 As shown, the second air valve 44 can also be a double-leaf door structure. During the process of rotating to open or close the fresh air inlet 413, the second air valve 44 with the double-leaf door structure occupies less space, which facilitates the flexible arrangement of other structural components.

[0071] The second air valve 44 of the rotary damper structure can be installed inside the fresh air duct 411. In the closed state, the second air valve 44 is approximately flush with the plane of the fresh air inlet 413 to close the fresh air inlet. In the open state, the two double-door dampers rotate toward the inside of the fresh air duct 411 to open part or all of the fresh air inlet 413.

[0072] Alternatively, the second damper 44 can also be a single-piece damper structure, which can switch between open and closed states by rotating and moving, and has a simple structure.

[0073] The second air valve 44, which has a rotary structure, can be installed inside the fresh air duct 411. In this case, the second air valve 44 can be rotatably connected to the duct component 41 and driven by a motor to switch between open and closed states.

[0074] Alternatively, the second air valve 44 can also be installed outside the fresh air duct 411. That is, the duct component 41 and the second air valve 44 are arranged on opposite sides of the housing 10 along the second direction X, and the housing 10 has a fresh air notch corresponding to the fresh air inlet 413, so that the second air valve 44 can close or open the fresh air notch to adjust the open or closed state of the fresh air inlet 413. In this case, the second air valve 44 is connected to the housing 10. The second air valve 44 can be configured as a rotary damper structure or a sliding damper structure, and can be driven to the open or closed state by an electric or actuating component, without limitation.

[0075] By adding a second air valve 44, the active opening and closing of the fresh air duct 411 and the regulation of the fresh air flow are realized, avoiding disorderly exchange of indoor and outdoor air, and reducing the reverse infiltration of dust or pollutants through the fresh air inlet. In other words, this application can precisely control the amount of fresh air introduced through the second air valve 44, preventing the air conditioning load from increasing due to excessive fresh air, and preventing external pollutants from entering the room when closed.

[0076] The second air valve 44 is configured to have multiple states, such as a first open state, a second open state, and a closed state. The first open state and the second open state refer to the second air valve 44 being at different opening angles to allow the fresh air inlet 413 to be fully or partially opened.

[0077] like Figure 6 As shown, when the second air valve 44 is closed, the fresh air inlet 413 is closed, and at this time, the indoor unit 100 only has circulating return airflow. Figure 5 As shown, when the second air valve 44 is in the first open state, the fresh air inlet 413 is fully open, that is, the second air valve 44 is rotated 90° from the closed state to make the fresh air inlet 413 fully open. At this time, the indoor unit 100 has a large fresh air circulation volume, such as when the fresh air setting is in the third or fourth setting.

[0078] like Figure 4 As shown, when the second air valve 44 is in the second open state, the fresh air inlet 413 is partially open, that is, the second air valve 44 is rotated 30-35° from the closed state to partially open the fresh air inlet 413. At this time, the indoor unit 100 has a small fresh air circulation volume, such as when the fresh air setting is in the first or second setting. In this way, by partially opening the second air valve 44 to reduce the opening area of ​​the fresh air inlet 413, it is beneficial to increase the flow rate of the fresh air while keeping the fresh air volume constant.

[0079] In this way, when the fresh air circulation is at a low level, by partially opening the second air valve 44, the fresh air flow can maintain a high flow speed in the fresh air duct 411 and the second air outlet 412, so that more fresh air can flow to the heat exchanger 30 for heat exchange, resulting in high fresh air heat exchange efficiency.

[0080] In other words, by reducing the opening area at the fresh air inlet 413, a higher static pressure can be maintained at the fresh air duct 411 and the second air outlet 412 under the condition of a certain fresh air volume, which is conducive to increasing the wind speed of the fresh air flow from the second air outlet 412.

[0081] For example, such as Figure 4 and Figure 5 As shown, the second air valve 44 includes a first air damper 441 and a second air damper 442. The first air damper 441 and the second air damper 442 are arranged in a double-door structure and are disposed within the fresh air duct 411. The first air damper 441 and the second air damper 442 are connected to the duct components. When the second air valve 44 is in the second open state, the first air damper 441 and the second air damper 442 rotate from the closed state to the second open state by a first preset angle, so that the fresh air inlet 413 is in a partially open state.

[0082] The first preset angle can be 30-35°, such as... Figure 4 As shown, in this second open state, the angle formed by the first damper 441 and the second damper 442 with the second direction X is a first preset angle. That is, in Figure 6 In the closed state shown, the first damper 441 and the second damper 442 are positioned perpendicular to the second direction X. Figure 5 In the first open state shown, the first damper 441 and the second damper 442 are arranged parallel to the second direction X.

[0083] In some embodiments, such as Figure 3 and Figure 7 As shown, the second air outlet 412 includes a first notch 4121 and a second notch 4122. The air duct component 41 is provided with an air outlet baffle 45 at the second air outlet 412 to divide the second air outlet 412 into the first notch 4121 and the second notch 4122.

[0084] The vent baffle 45 refers to the partition structure provided at the second air outlet 412, which divides the second air outlet 412 into a first notch 4121 and a second notch 4122 that are spaced apart. The vent baffle 45 can be a separate component, connected to the second air outlet 412 of the duct component 41 by means of screws, rivets, adhesives, or welding. Alternatively, the vent baffle 45 and the duct component 41 can be integrally formed, creating a second air outlet 412 including the first notch 4121 and the second notch 4122 on the front side of the duct component 41.

[0085] The first gap 4121 and the second gap 4122 refer to two independent air outlet areas separated by the air outlet baffle 45. Specifically, they can take the form of rectangular, trapezoidal, or arc-shaped openings, such as two symmetrically distributed rectangular openings. This allows the fresh airflow blown out from the second air outlet 412 to flow to different areas through the spaced first gap 4121 and the second gap 4122, which helps to improve the uniformity of mixing between the fresh airflow and the return airflow.

[0086] Furthermore, the two independent air outlet areas, the first notch 4121 and the second notch 4122, can face different areas of the heat exchanger to avoid the fresh air flow being concentrated on a part of the heat exchanger 30, which is conducive to improving the heat exchange efficiency and heat exchange effect between the fresh air flow and the heat exchanger 30.

[0087] Meanwhile, the arrangement of the air vent baffle 45 results in a smaller opening area for the first notch 4121 and the second notch 4122, thus reducing the opening area at the second air outlet 412. For example, the sum of the areas of the first notch 4121, the second notch 4122, and the air vent baffle 45 is less than or equal to the area of ​​the second air outlet 412.

[0088] In this way, with a fixed fresh air volume, by reducing the opening area of ​​the second air outlet 412, a higher static pressure is achieved in the fresh air duct 411, so that the fresh air flow has a higher velocity when it is blown out from the first notch 4121 and the second notch 4122, allowing the fresh air flow to reach the heat exchanger 30 for heat exchange more quickly and in greater quantities, thereby improving the heat exchange effect and efficiency of the fresh air flow.

[0089] At the second air outlet 412, as shown Figure 1 , Figure 3 and Figure 7As shown, the fresh air assembly 40 also includes a first air guide plate 461 and a second air guide plate 462. The first air guide plate 461 is rotatably connected to the air duct component 41 and is used to adjust the air outlet direction at the first notch 4121. The second air guide plate 462 is rotatably connected to the air duct component 41 and is used to adjust the air outlet direction at the second notch 4122. The first air guide plate 461 and the second air guide plate 462 are configured to open or close the first notch 4121 and the second notch 4122.

[0090] The first air guide plate 461 is a plate-shaped structure that can rotate around an axis, specifically implemented by a hinge or a pivot connection, used to change the outlet angle of the airflow exiting from the first notch 4121. The second air guide plate 462 is a plate-shaped structure that can rotate around an axis, specifically implemented by a hinge or a pivot connection, used to change the outlet angle of the airflow exiting from the second notch 4122.

[0091] The first air guide plate 461 and the second air guide plate 462 can be driven and controlled by components such as motors or cylinders to rotate the first air guide plate 461 and the second air guide plate 462 to a closed state to close the first gap 4121 and the second gap 4122, thereby preventing the fresh air flow from the first gap 4121 and the second gap 4122 out of the fresh air duct 411.

[0092] Alternatively, the first air guide plate 461 and the second air guide plate 462 can be rotated to their open positions, so that the fresh air flow in the fresh air duct 411 flows through the first notch 4121 and the second notch 4122 to different areas of the heat exchanger 30. During this process, the opening angle of the first air guide plate 461 and the second air guide plate 462 can be further adjusted to increase the heat exchange area of ​​the fresh air flow through the heat exchanger 30, thereby improving the heat exchange effect and efficiency of the fresh air flow.

[0093] In some other embodiments, the coordinated action of the first air guide plate 461 and the second air guide plate 462 enables the fresh airflow to be adjusted in different areas as needed. For example, when it is necessary to enhance the mixing effect, two gaps can be opened at the same time, and when it is necessary to direct the airflow, the air guide angle of a certain gap can be adjusted individually. This is not limited.

[0094] Through the above technical solution, this application achieves independent zoned control of the first notch 4121 and the second notch 4122 at the second air outlet 412. That is, when needed, the first notch 4121 and the second notch 4122 can be opened simultaneously, allowing fresh air to directly flow from the first notch 4121 and the second notch 4122 to the heat exchanger 30 for heat exchange. Alternatively, the first notch 4121 and the second notch 4122 can be closed by the first air guide plate 461 and the second air guide plate 462 to prevent the fresh air flow from the fresh air duct 411 from directly blowing onto the heat exchanger 30.

[0095] In addition, by independently controlling the first air guide plate 461 and the second air guide plate 462, the air guiding angles of the first notch 4121 and the second notch 4122 are adjusted respectively, so as to flexibly adjust the contact range between the fresh air flow and the heat exchanger 30 according to the fresh air volume and fresh air temperature, thereby improving the heat exchange efficiency of the air conditioning system.

[0096] Specifically, refer to Figure 3 and Figure 7 At a second air outlet 412, the first notch 4121 and the second notch 4122 are distributed at intervals along the third direction Z, and the first direction Y, the second direction X, and the third direction Z are at angles to each other. Taking the third direction Z as the vertical direction, the first notch 4121, the air outlet baffle 45, and the second notch 4122 are distributed sequentially from top to bottom.

[0097] That is, the first notch 4121 is located above the second notch 4122 along the third direction Z, and the first air guide plate 461 rotates to... Figure 7 In the case of the preset position shown. If the fresh air inlet 413 (e.g.) Figure 4 If the first temperature difference ΔT between the fresh air temperature T1 at the location shown and the preset temperature T0 is greater than the first preset value T2, then the first air guide plate 461 is controlled to continue rotating at the preset position from the closed state to the open state.

[0098] Among them, reference Figure 7 and Figure 8 The fresh air angle α of the first air guide plate 461 rotating from the preset position is proportional to the value of the first temperature difference ΔT. The first air guide plate 461 rotates along an axis parallel to the second direction X, and the preset position is the position where the first air guide plate 461 rotates to an angle perpendicular to the third direction Z to open the first notch 4121.

[0099] In the embodiments of this application, for ease of description, the first direction Y is the front-to-back direction, the second direction X is the left-to-right direction, and the third direction Z is the up-to-down direction. For example, the second air outlet 412 is located on the front side of the air duct component 41, and the first notch 4121 is located above the second notch 4122.

[0100] The preset position refers to the first air guide plate 461 rotating to a spatial angle perpendicular to the third direction Z, that is, the first air guide plate 461 rotating to a horizontal position, at which time the fresh air flow from the first notch 4121 blows forward horizontally along the first direction Y.

[0101] Specifically, for the first air guide plate 461, a flexible and precise adjustment of the rotation angle can be achieved through an angle sensor in conjunction with a drive motor. Alternatively, the drive motor can be set to a stepper motor and a servo motor, and after setting the initial preset parameters, no additional angle sensor is required.

[0102] The first temperature difference ΔT refers to the difference between the fresh air temperature T1 and the preset temperature T0. Specifically, it can be calculated in real time using a temperature sensor combined with a controller, and the controller is connected to control the drive motor to at least adjust the fresh air angle α of the first air guide plate 461. The direct proportionality between the fresh air angle α and the first temperature difference ΔT means that the fresh air angle α of the first air guide plate 461 increases linearly as the first temperature difference ΔT increases.

[0103] For example, when the first temperature difference ΔT is 0°, the fresh air angle α is 0°. The proportionality coefficient between the fresh air angle α and the first temperature difference ΔT can be set to 10, meaning that for every 1° increase in temperature difference, the fresh air angle α increases by 10°. This continues until the fresh air angle α reaches its maximum value of 90°, allowing the fresh air flow from the first notch 4121 to pass through a larger area of ​​the heat exchanger 30.

[0104] Specifically, when the indoor unit 100 is in cooling mode, the first temperature difference ΔT refers to the value by which the fresh air temperature T1 is higher than the preset temperature T0. When the indoor unit 100 is in heating mode, the first temperature difference ΔT refers to the value by which the fresh air temperature T1 is lower than the preset temperature T0.

[0105] With the first air guide plate 461 opened to a horizontal state as a reference, the fresh air angle α of the first air guide plate 461 is proportional to the first temperature difference ΔT. When there is no temperature difference or a small temperature difference between the fresh air temperature T1 and the preset temperature T0, the first air guide plate 461 is adjusted to a smaller fresh air angle α so that the fresh air flowing out of the first gap 4121 can flow through a smaller area of ​​the heat exchanger 30. While maintaining a high heat exchange efficiency of the fresh air flow, it avoids contacting a larger area of ​​the heat exchanger 30 to avoid being overheated or overcooled.

[0106] If there is a large temperature difference between the fresh air temperature T1 and the preset temperature T0, the first air guide plate 461 is adjusted to a larger fresh air angle α or to the maximum opening state so that the fresh air flowing out of the first notch 4121 can flow through a larger area of ​​the heat exchanger 30, so that the heat exchanger 30 can fully cool or heat the fresh air flow, and the mixed air flow flowing out of the first air outlet 11 can be kept in the comfortable range near the preset temperature T0.

[0107] Thus, through the above-described scheme, this application achieves automatic adjustment of the fresh air outlet angle based on temperature differences, effectively improving the mixing efficiency of hot and cold air. When the temperature difference is large, the rotation angle of the air guide vane is increased to accelerate airflow diffusion and increase the contact heat exchange area with the heat exchanger 30, avoiding localized excessively high or low temperatures. When the temperature difference is small, the angle is reduced to maintain stable airflow, thereby reducing the contact heat exchange area with the heat exchanger 30 to avoid overheating or overcooling, and reducing airflow disturbance. This dynamic adjustment mechanism not only improves indoor temperature uniformity but also increases heat exchange efficiency and reduces energy waste, while also helping to extend the service life of the equipment.

[0108] In some embodiments, such as Figure 6 and Figure 9 As shown, the air duct component 41 has a fresh air inlet 413 at one end along the second direction X. Inside the fresh air duct 411, the side of the air duct component 41 opposite to the fresh air inlet 413 along the second direction X has a boss 414 facing the fresh air inlet 413, and an arc-shaped guide portion 415 is provided between the inner wall of the air duct component 41 and the boss 414.

[0109] The boss 414 refers to a protruding structure extending towards the fresh air inlet 413 inside the fresh air duct 411. It can be formed by providing a protruding component on the inner wall of the fresh air duct 411, or by stamping a recess along the second direction X towards the fresh air inlet 413 on the corresponding outer wall of the duct component 41, thus forming the boss 414 on the inner side of the duct component 41. The arc-shaped guide portion 415 refers to the curved transition surface of the recessed structure around the boss 414.

[0110] Due to the viscosity of the fluid, the fresh airflow, as it flows within the fresh air duct 411, approaches the inner wall of the duct and flows towards the protrusion 414 in the second direction X. When the fresh airflow reaches the protrusion 414, it changes direction along the arc-shaped guide section 415 around the protrusion 414 and flows in the opposite direction along the sidewalls around the protrusion 414. Because most of the fresh airflow entering the fresh air duct 411 flows close to the sidewalls of the duct 411, the central region of the fresh air duct 411 has a lower wind speed, which helps to reduce turbulence and aerodynamic noise near the protrusion 414.

[0111] In some embodiments, such as Figure 1 and Figure 2 As shown, a partition 12 is provided inside the housing 10, which divides the housing 10 into an air inlet chamber 14 and an air outlet chamber 13 along the first direction Y. The partition 12, the air duct component 41, the heat exchanger 30, and the first air outlet 11 are distributed sequentially along the first direction Y within the air outlet chamber 13. The air duct component 41 is located within the air outlet chamber 13 and is at least connected to the partition 12.

[0112] The partition 12 refers to a plate-like structure installed inside the housing 10 to divide space. It can be made of metal or plastic sheets and installed by welding or bolting. This divides the interior of the housing 10 into an air inlet chamber 14 and an air outlet chamber 13 to optimize airflow. The air inlet chamber 14 is the area for introducing indoor air. It can be equipped with an air inlet that communicates with the indoor environment, allowing air to enter the air inlet chamber 14 and the air outlet chamber 13 sequentially under the action of a fan, and then exit through the first air outlet 11 after heat exchange in the heat exchanger 30. The air outlet chamber 13 is the area for installing the heat exchanger 30 to heat or cool the air. Alternatively, fresh air and return air can be mixed within the air outlet chamber 13 and the mixed airflow can be discharged through the first air outlet 11.

[0113] By fixing the air duct component 41 inside the air outlet cavity 13 and connecting it to the partition plate 12, the fresh air output from the fresh air duct 411 mixes with the indoor air inside the air outlet cavity and is then sent out through the first air outlet 11. Through the separation effect of the partition plate 12, the airflow paths of the air inlet cavity 14 and the air outlet cavity 13 are physically isolated, preventing untreated air from directly entering the air outlet area. The connection between the air duct component 41 and the partition plate 12 further enhances structural stability, ensuring that the fresh air duct 411 can operate continuously and stably.

[0114] In some embodiments, such as Figure 1 and Figure 10 As shown, the indoor unit 100 also includes an indoor fan 20, which is disposed in the air inlet cavity 14. The partition 12 is provided with a ventilation opening 15 that connects the air inlet cavity 14 and the air outlet cavity 13. The air outlet side of the indoor fan 20 is disposed towards the ventilation opening 15.

[0115] Ventilation gap 15 refers to the airflow channel opening formed on the partition plate 12. It is positioned corresponding to the air outlet side of the indoor fan 20, allowing the indoor fan 20 to drive air through the ventilation gap 15 towards the heat exchanger 30, and then deliver it into the room through the first air outlet 11. Taking a centrifugal fan as an example, multiple centrifugal fans can be arranged at intervals along the second direction X. Each centrifugal fan outlet corresponds to a ventilation gap 15 connected to the partition plate 12, or the outlet passes through the ventilation gap 15, allowing the indoor fan 20 to drive air from the air inlet cavity 14 through the ventilation gap 15 to the heat exchanger.

[0116] Alternatively, the indoor fan 20 can be one or more axial flow fans. In this case, a closed flow channel needs to be set between the air outlet side of the indoor fan 20 and the ventilation opening 15 to prevent the air blown out by the indoor fan 20 from flowing into the air inlet cavity 14.

[0117] In this configuration, on the side of the air outlet cavity 13 near the middle partition 12, ventilation gaps 15 and air duct components 41 are spaced apart along the third direction Z. Taking the ventilation gap 15 located above the air duct component 41 along the third direction Z as an example, the air duct component 41 located below the ventilation gap 15 can make full use of the space layout within the air outlet cavity 13 without affecting the return airflow blowing from the ventilation gap 15 to the heat exchanger 30.

[0118] In some embodiments, such as Figure 1 and Figure 10 As shown, the indoor unit 100 also includes a fresh air fan 50, which is located outside the housing 10. The air outlet of the fresh air fan 50 is connected to the fresh air inlet 413 so that fresh air from the outside can be sent into the air outlet cavity 13 through the fresh air inlet 413, the fresh air duct 411, and the second air outlet 412 for mixing and heat exchange.

[0119] It should be noted that, referring to Figure 7 and Figure 11 The first air guide plate 461 and the second air guide plate 462 can also be rotated to a closed state to close the first gap 4121 and the second gap 4122, so that the fresh air flow in the fresh air duct 411 will not flow out from the second air outlet 412.

[0120] Based on this, such as Figure 11 and Figure 12 As shown, the fresh air assembly 40 also includes a third air valve 47, and the air duct component 41 is provided with a connection to the air outlet cavity 13 (e.g., Figure 10 The third air outlet 416 (as shown). The third air valve 47 is connected to the air duct component 41 and is used to open or close the third air outlet 416.

[0121] In other words, the third air outlet 416 and the second air outlet 412 are located on opposite sides of the air duct component 41 along the first direction Y, that is, the second air outlet 412 is located on the front side of the air duct component 41. The third air outlet 416 is located on the rear side of the air duct component 41, or two or more third air outlets 416 are distributed at intervals along the second direction X on the rear side of the air duct component 41.

[0122] Correspondingly, at the partition plate 12 on the rear side of the air duct component 41, the partition plate 12 is provided with a ventilation opening corresponding to the air duct component 41 or the third air outlet 416, so that the third air outlet 416 can be connected to the rear air inlet cavity 14 through the partition plate 12.

[0123] The third air valve 47 refers to the damper structure installed at the third air outlet 416. Specifically, it can be implemented as a rotary damper or a sliding damper, and its opening and closing actions can be controlled by a motor drive or a pneumatic rod drive.

[0124] like Figure 11 and Figure 12As shown, the third air valve 47 can be a double-leaf door structure. During the process of rotating to open or close the third air outlet 416, the third air valve 47 with the double-leaf door structure occupies less space, which facilitates the flexible arrangement of other structural components.

[0125] The third damper 47 of the rotary damper structure can be installed inside the fresh air duct 411. In the closed state, the third damper 47 is approximately flush with the plane of the third air outlet 416 to close the third air outlet 416. In the open state, the two double-door dampers rotate toward the inside of the fresh air duct 411 to open the third air outlet 416.

[0126] Alternatively, the third damper 47 can also be a single-piece damper structure, which can switch between open and closed states by rotating and moving, and has a simple structure.

[0127] The rotary third air valve 47 can be installed in the fresh air duct 411. At this time, the third air valve 47 can be rotatably connected to the duct component 41 and driven by a motor to switch between open and closed states.

[0128] Alternatively, the third air valve 47 can also be installed outside the fresh air duct 411. That is, the duct component 41 and the third air valve 47 are arranged on opposite sides of the partition plate 12 along the first direction Y, and the partition plate 12 has a ventilation opening corresponding to the third air outlet 416, so that the third air valve 47 can close or open the ventilation opening to adjust the opening or closing state of the third air outlet 416. In this case, the third air valve 47 is connected to the partition plate 12. The third air valve 47 can be configured as a rotary damper structure or a sliding damper structure, and can be driven to the open or closed state by an electric or actuating component, without limitation.

[0129] Thus, by opening a third air outlet 416 connected to the air inlet cavity 14 on the side of the air duct component 41 facing the air inlet cavity 14, and a third air valve 47 for opening or closing the third air outlet 416, the fresh air duct 411 in the air duct component 41 can be selectively connected to the air outlet cavity 13 or the air inlet cavity 14.

[0130] For example, in cooling or dehumidification mode, if fresh air circulation needs to be activated and the fresh air temperature T1 has a large first temperature difference ΔT with the preset temperature T0, i.e., the first temperature difference is greater than or equal to a second preset value T3, where the second preset value T3 can be any temperature between 5-15℃, then if the fresh air flow directly blows onto the heat exchanger 30 through the second air outlet 412 for cooling or dehumidification, this portion of fresh air will be cooled to a lower temperature at the heat exchanger 30 and generate more condensate.

[0131] When the air supply speed of the indoor unit 100 is high, a large amount of condensate on the heat exchanger 30 will be blown out from the first air outlet 11 by the high-speed airflow, which will cause the indoor unit 100 to blow water, which will damage the indoor environment and result in a poor user experience.

[0132] Based on this, the second air outlet 412 on the front side can be closed and the third air outlet 416 on the rear side can be opened, so that the fresh air in the fresh air duct 411 can flow to the indoor fan 20 through the third air outlet 416 under the drive of the indoor fan 20, and fully mix with the return air flowing through the indoor fan 20. The mixed air can flow to the heat exchanger 30 through the ventilation gap 15 for cooling.

[0133] Because the fresh air and return air are fully mixed before flowing through the heat exchanger 30, the temperature of the mixed air is lower than the fresh air temperature T1. As a result, the temperature drop of the mixed air is smaller during the process of flowing through the heat exchanger 30, and a large amount of condensate will not be generated, thereby reducing or avoiding the phenomenon of water blowing from the indoor unit 100.

[0134] It should be noted that by setting the third air outlet 416, the problem of large turbulence and noise when fresh air and return air are directly mixed in the air outlet cavity 13 can also be solved, which will not be elaborated here.

[0135] Taking indoor fan 20 as an example, if it is a centrifugal fan, Figure 10 and Figure 12 As shown, the fresh air assembly 40 also includes a third guide plate 48. Along the second direction X, a third guide plate 48 is provided on both sides of a third air outlet 416, and the air inlet of the indoor fan 20 is located between the two third guide plates 48.

[0136] By guiding and constraining the outflowing fresh air flow through the two third guide plates 48 on the left and right sides of the third air outlet 416, more fresh air flow can flow directly to the air inlets on both sides of the indoor fan 20 in the axial direction, preventing the fresh air flow from spreading further away from the air inlet cavity 14, which is beneficial to improving the air supply efficiency of the indoor fan 20 and the fresh air fan 50.

[0137] For example, such as Figure 10 As shown, the third guide plate 48 is an arc-shaped plate, and the axis of the third guide plate 48 is parallel to the third direction Z. Between the two third guide plates 48 connected to the same third air outlet 416, the axis of the third guide plate 48 is located between the two third guide plates 48 along the second direction X.

[0138] In this way, by setting the third guide plate 48 of the arc plate structure, the fresh air flow from the third air outlet 416 can flow more toward the air inlets on both sides of the indoor fan 20. While improving the air supply efficiency of the indoor fan 20, the setting of the arc plate helps to reduce the start-up noise during the change of direction of the fresh air flow.

[0139] In this embodiment, the indoor unit 100 can be a ducted air conditioner or a wall-mounted unit. The indoor unit 100 can be used in air conditioners, dehumidifiers, or fresh air systems, etc. No limitation is made in this regard.

[0140] On the other hand, this application embodiment also provides a fresh air conditioner, including the indoor unit 100 mentioned above. Since this fresh air conditioner includes the indoor unit 100 mentioned above, it possesses all the effects of the aforementioned indoor unit 100, thus solving the problem of significant turbulence and noise when fresh air and return air mix in the indoor unit, which will not be elaborated further here.

[0141] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0142] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0143] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An indoor unit, characterized by, include: A housing, wherein the housing is provided with a first air outlet along a first direction; A heat exchanger is disposed within the housing; The air duct component is located inside the housing, and the air duct component and the first air outlet are located on opposite sides of the heat exchanger along the first direction; the air duct component is provided with a fresh air duct extending along the second direction, and the air duct component is provided with a second air outlet along the first direction toward the first air outlet; the second air outlet is connected to the fresh air duct, and there is an angle between the first direction and the second direction.

2. The indoor unit of claim 1, characterized in that, The number of second air outlets is at least two and they are spaced apart along the second direction. The air duct component is also provided with a fresh air inlet that connects to the fresh air duct. The indoor unit also includes a first air valve, which is disposed in the fresh air duct and connected to the duct component. The first air valve is located between two adjacent second air outlets along the second direction. The first air valve is configured to have an open state and a closed state; when the first air valve is in the closed state, the second air outlet located between the fresh air inlet and the first air valve is connected to the fresh air inlet along the second direction.

3. The indoor unit of claim 2, characterized in that, The indoor unit also includes: The second air valve is located at the fresh air inlet and connected to the air duct or the housing, and is used to open or close the fresh air inlet.

4. The indoor unit of claim 3, characterized in that, The second air valve is configured to include at least a first open state, a second open state, and a closed state; When the second air valve is in the first open state, the fresh air inlet is fully open; When the second air valve is in the second open state, the fresh air inlet section is open; When the second air valve is in the closed state, the fresh air inlet is in the closed state.

5. The indoor unit of claim 2, wherein, The fresh air inlet is provided at one end of the air duct component along the second direction; Inside the fresh air duct, the duct component has a protrusion facing the fresh air inlet on the side opposite to the fresh air inlet along the second direction, and an arc-shaped guide portion is provided between the inner wall of the duct component and the protrusion.

6. The indoor unit according to any one of claims 2-5, characterized by, The second air outlet includes a first notch and a second notch; The air duct component has an air outlet baffle at the second air outlet to divide the second air outlet into the first notch and the second notch.

7. The indoor unit of claim 6, characterized in that, The indoor unit also includes: The first air guide plate is rotatably connected to the air duct component and is used to adjust the air outlet direction at the first notch. And a second air guide plate, which is rotatably connected to the air duct component and is used to adjust the air outlet direction at the second notch; The first air guide plate and the second air guide plate are configured to open or close the first notch and the second notch, respectively.

8. The indoor unit of claim 7, characterized in that, At a second air outlet, the first notch and the second notch are distributed at intervals along a third direction, and the first direction, the second direction and the third direction are at an angle to each other; The first notch is located above the second notch along the third direction, when the first air guide plate is rotated to a preset position; If the temperature difference between the fresh air temperature at the fresh air inlet and the preset temperature is greater than the first preset value, then the first air guide plate is controlled to rotate from the closed state to the open state to the preset position and continue to rotate. Wherein, the angle of fresh air as the first air guide plate continues to rotate from the preset position is directly proportional to the value of the first temperature difference; The first air guide plate rotates along an axis parallel to the second direction, and the preset position is the position where the first air guide plate rotates to an angle perpendicular to the third direction to open the first notch.

9. The indoor unit according to any one of claims 1-5, characterized by, The housing is provided with a partition plate, which divides the housing into an air inlet cavity and an air outlet cavity along the first direction. The partition plate, the air duct component, the heat exchanger and the air outlet are distributed sequentially along the first direction in the air outlet cavity. The air duct component is located within the air outlet cavity and is at least connected to the middle partition.

10. The indoor unit of claim 9, characterized in that, The indoor unit also includes: An indoor fan is provided, which is disposed in the air inlet cavity. The partition plate is provided with a ventilation opening that connects the air inlet cavity and the air outlet cavity. The air outlet side of the indoor fan is disposed facing the ventilation opening. The third air valve is provided, and the air duct component is provided with a third air outlet that connects to the air outlet cavity. The third air valve is connected to the air duct component and is used to open or close the third air outlet.

11. The indoor unit of claim 10, characterized in that, The indoor fan is a centrifugal fan, and the indoor unit also includes a third deflector plate; Along the second direction, the third air outlet is provided on both sides of the third air outlet, and the air inlet of the indoor fan is located between the two third air outlets.

12. The indoor unit of claim 11, characterized in that, The third guide plate is an arc-shaped plate, and the axis of the third guide plate is parallel to the third direction; Between the two third guide vanes connected to the same third air outlet, the axis of the third guide vane is located between the two third guide vanes along the second direction; The first direction, the second direction, and the third direction are at angles to each other.

13. A fresh air conditioner characterized by comprising: Including the indoor unit as described in any one of claims 1-12.

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