Indoor unit and fresh air conditioner

Abstract

The invention relates to an indoor unit and a fresh air conditioner, and relates to the technical field of air conditioners. The problems that when fresh air and return air in an indoor unit are mixed, large turbulence and noise exist are solved. The indoor unit comprises a shell, a heat exchanger and an air duct piece. The shell is provided with a first air outlet in the first direction, and the heat exchanger and the air duct piece are arranged in the shell. The air duct piece and the first air outlet are located on the two opposite sides of the heat exchanger in the first direction. A fresh air duct extending in the second direction is arranged in the air duct piece, and the air duct piece is provided with a second air outlet facing the first air outlet in the first direction. The second air outlet communicates with the fresh air duct, and an included angle is formed between the first direction and the second direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to an indoor unit and a fresh air conditioner. BACKGROUND

[0002] With the continuous development of air conditioner fresh air technology, the application of fresh air modules in air conditioners is increasingly widespread, significantly improving the user experience and indoor comfort. Current air conditioner fresh air systems mainly adopt two processing methods: one is to completely separate the fresh air duct from the indoor unit air duct, and the fresh air is directly sent into the indoor through an independent air outlet; the other is to introduce fresh air into the upstream of the indoor heat exchanger, mix with the return air, and then send it out after temperature adjustment by the heat exchanger. However, both methods have obvious defects.

[0003] For the direct air supply method, since the fresh air is not temperature-regulated and directly enters the indoor, or has a temperature difference with the return air, it is easy to cause uneven temperature distribution of the air supply flow, affecting the uniformity of the indoor temperature field. For the mixed air supply method, due to the existing structural design, when the fresh air and the return air are mixed in the indoor unit, the outflow direction of the fresh air usually forms a large angle or even a perpendicular relationship with the airflow direction of the return air. This airflow intersection method will produce obvious turbulence, not only causing large airflow noise, but also significantly reducing the outflow speed and air volume. SUMMARY

[0004] The present 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 the present application provide an indoor unit, comprising a shell, a heat exchanger, and an air duct. The shell is provided with a first air outlet along a first direction, and the heat exchanger and the air duct are arranged in the shell. The air duct and the first air outlet are located on opposite sides of the heat exchanger along the first direction. The air duct is provided with a fresh air duct extending along a second direction, and the air duct is provided with a second air outlet facing the first air outlet along the first direction. The second air outlet is in communication with the fresh air duct, and the first direction and the second direction form an angle.

[0006] In an optional embodiment, the number of second air outlets is at least two and is spaced apart along the second direction, and the air duct is further provided with a fresh air inlet communicating with the fresh air duct. The indoor unit further comprises a first air valve arranged in the fresh air duct and connected with the air duct, and the first air valve is located between the adjacent two 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 along the second direction is in communication with the fresh air inlet.

[0007] In an optional implementation, the indoor unit further comprises a second air valve, which is located at the fresh air inlet and connected with the air duct or the shell, and is configured to open or close the fresh air inlet.

[0008] In an optional implementation, the second air valve is configured to at least include 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 opened. When the second air valve is in the second open state, the fresh air inlet is partially opened. When the second air valve is in the closed state, the fresh air inlet is closed.

[0009] In an optional implementation, the air duct is provided with the fresh air inlet at one end in the second direction. In the fresh air duct, a boss is arranged on the side of the air duct opposite to the fresh air inlet in the second direction and facing the fresh air inlet, and an arc-shaped flow guide is arranged between the inner wall of the air duct and the boss.

[0010] In an optional implementation, the second air outlet comprises a first gap and a second gap. The air duct is provided with an air outlet baffle at the second air outlet to separate the second air outlet into the first gap and the second gap.

[0011] In an optional implementation, the indoor unit further comprises a first air deflector and a second air deflector. The first air deflector is rotationally connected with the air duct and is configured to adjust the air outlet direction at the first gap. The second air deflector is rotationally connected with the air duct and is configured to adjust the air outlet direction at the second gap. The first air deflector and the second air deflector are configured to open or close the first gap and the second gap.

[0012] In an optional implementation, at a second air outlet, the first gap and the second gap are spaced apart along a third direction, and the first direction, the second direction and the third direction have an included angle therebetween. The first gap is located above the second gap along the third direction when the first air deflector is rotated to a preset position. If a first temperature difference between the fresh air temperature at the fresh air inlet and a preset temperature is greater than a first preset value, the first air deflector is continuously rotated from the closed state to the open state to the preset position. The fresh air angle by which the first air deflector is continuously rotated from the preset position is directly proportional to the value of the first temperature difference. The first air deflector is rotated along an axis parallel to the second direction, and the preset position is a position at which the first air deflector is rotated to an angle perpendicular to the third direction to open the first gap.

[0013] In an optional implementation, the shell is provided with a partition plate, which divides the shell into an air inlet cavity and an air outlet cavity along the first direction. The partition plate, the air duct, the heat exchanger and the air outlet are sequentially arranged in the air outlet cavity along the first direction. The air duct is located in the air outlet cavity and connected with at least the partition plate.

[0014] In an optional implementation, the indoor unit further comprises an indoor fan and a third air valve. The indoor fan is arranged in the air inlet cavity, the partition plate is provided with a ventilation gap communicating the air inlet cavity and the air outlet cavity, and the air outlet side of the indoor fan is arranged towards the ventilation gap. The air duct member is provided with a third air outlet communicating the air outlet cavity, and the third air valve is connected with the air duct member and used for opening or closing the third air outlet.

[0015] In an optional implementation, the indoor fan is a centrifugal fan, and the indoor unit further comprises third guide plates. Along the second direction, the opposite sides of a third air outlet are respectively provided with third guide plates, and the air inlet of the indoor fan is located between the two third guide plates.

[0016] In an optional implementation, 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 plates connected with the same third air outlet, the axis of the third guide plate is located between the two third guide plates along the second direction. The first direction, the second direction and the third direction have an included angle therebetween.

[0017] In the second aspect, some embodiments of the present application provide a fresh air conditioner, comprising the indoor unit in the above aspect.

[0018] The technical scheme provided by the embodiments of the present application at least has the following beneficial effects:

[0019] Since the first direction and the second direction have an included angle therebetween, that is, the length direction of the fresh air duct in the air duct member and the opening direction of the second air outlet are inconsistent. Taking the first direction as the front-rear direction and the second direction as the left-right direction as an example, that is, the air duct member and the fresh air duct are arranged in the left-right direction, and the second air outlet communicating the fresh air duct is arranged on the front side of the air duct member, so that the fresh air sent by the fresh air duct can be blown out towards the heat exchanger and the first air outlet through the second air outlet.

[0020] That is, after the fresh air flow enters the fresh air duct along the second direction, the motion direction is changed at the second air outlet, and the fresh air blown out by the second air outlet can be blown to the heat exchanger and the first air outlet. In the process of blowing the fresh air flow to the heat exchanger and the first air outlet, the return air flow inside the shell also blows to the heat exchanger and the first air outlet along the first direction, and the flow directions of the fresh air flow and the return air flow in the above-mentioned mixing area are the same or have a small included angle to form a progressive intersection, avoiding direct collision of the two air flows. This mixing method reduces the vortex area generated by the collision of the air flows, is beneficial to reduce the aerodynamic noise and improve the mixing degree of the fresh air flow and the return air flow, so that the temperature field distribution of the air flow blown out by the first air outlet is more uniform. And, since the flow directions of the fresh air flow and the return air flow are the same or have a small included angle, the flow velocities of the fresh air flow and the return air flow can be partially superimposed in the mixing process, so that the mixed air flow has a higher flow velocity when sent out by the first air outlet, which is beneficial to improve the air supply amount. BRIEF DESCRIPTION OF DRAWINGS

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

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0023] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0024] Figure 1 A cross-sectional view of an indoor unit according to an embodiment of the present application is provided.

[0025] Figure 2 A cross-sectional view of an indoor unit according to an embodiment of the present application is provided. Figure 1 A cross-sectional view of an indoor unit according to an embodiment of the present application is provided.

[0026] Figure 3 A cross-sectional view of an indoor unit according to an embodiment of the present application is provided. Figure 1 A perspective structural schematic view of a duct piece according to an embodiment of the present application is provided.

[0027] Figure 4 A perspective structural schematic view of a duct piece according to an embodiment of the present application is provided. Figure 3 A first internal structural schematic view of a duct piece according to an embodiment of the present application is provided.

[0028] Figure 5 A first internal structural schematic view of a duct piece according to an embodiment of the present application is provided. 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] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0044] The following provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0045] In order to facilitate the description, spatial relative terms can be used in the description to describe the relative positional relationship or motion condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the motion state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the up and down positions. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0046] Figure 1 A sectional view of an indoor unit according to an embodiment of the present application. Figure 2 A sectional view of the indoor unit shown in Figure 1 A sectional view of the indoor unit shown in Figure 3 A sectional view of the indoor unit shown in Figure 1 A perspective structural schematic view of the air duct member shown in Figure 4 A sectional view of the air duct member shown in Figure 3 A first internal structural schematic view of the air duct member shown in Figure 5 A sectional view of the air duct member shown in Figure 3 A second internal structural schematic view of the air duct member shown in Figure 6 A sectional view of the air duct member shown in Figure 3A third internal structure schematic view of the air duct member shown. Figure 7 For Figure 3 A first cross-sectional view of the air duct member shown in a plane perpendicular to the second direction. Figure 8 For Figure 1 A local enlarged schematic view at A in the middle. Figure 9 For Figure 10 A second cross-sectional view of the air duct member shown in a plane perpendicular to the second direction. Figure 1 For Figure 11 A third cross-sectional view of the indoor unit shown at a third angle. Figure 3 For Figure 12 A second cross-sectional view of the air duct member shown in a plane perpendicular to the second direction. Figure 3 For A third cross-sectional view of the indoor unit shown at a third angle.

[0047] With the continuous development of air conditioning fresh air technology, the application of fresh air modules in air conditioners is increasingly widespread, significantly improving user experience and indoor comfort. Current air conditioning fresh air systems mainly adopt two processing methods: one is to completely separate the fresh air duct from the indoor unit air duct, and the fresh air is directly sent into the room through an independent air outlet; the other is to introduce fresh air upstream of the indoor heat exchanger, mix with return air, and then send it out after temperature adjustment by the heat exchanger. However, both methods have obvious defects.

[0048] For the direct air supply method, since the fresh air is not temperature-regulated and directly enters the room, or has a temperature difference with the return air, it is easy to cause uneven temperature distribution of the air supply flow, affecting the uniformity of the indoor temperature field.

[0049] For the mixed air supply method, due to the existing structural design, when the fresh air mixes with the return air in the indoor unit, the direction of the fresh air outlet is usually at a large angle or even perpendicular to the direction of the return air flow, causing a directional conflict between the fresh air flow and the indoor return air during mixing. When the fresh air outlet forms a spatial angle with the main air duct, the two air flows produce a shear effect in the intersection area, significantly increasing the turbulence intensity. This flow instability not only causes local pressure field distortion, but also causes an abnormal increase in the high-frequency component of the aerodynamic noise spectrum, while reducing the axial momentum transfer efficiency of the air flow in the main air duct. That is, not only does it cause a large air flow noise, but it also significantly reduces the outlet air speed and air volume.

[0050] Based on this, please refer to Figures 1 to 12 The embodiments of the present application provide an indoor unit and a fresh air air conditioner to solve the problem of large turbulence and noise when fresh air mixes with return air in the indoor unit.

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

[0052] As shown in Figure 1 and Figure 2 , the shell 10 is provided with a first air outlet 11 along a first direction Y, the heat exchanger 30 and the air duct 41 are arranged in the shell 10, and the air duct 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 that the front side of the shell 10 is provided with the first air outlet 11, the first direction Y can be the front-back direction. That is, the air duct 41, the heat exchanger 30 and the first air outlet 11 are spaced apart from back to front in the shell 10. The heat exchanger 30 and the air duct 41 can be directly connected and fixed with the shell 10, or can be connected and fixed with the shell 10 through a support or other fixing component to form a stable structure.

[0054] Continuing to refer to Figure 1 and Figure 2 , the air duct 41 is provided with a fresh air duct 411 extending along a second direction X, and the air duct 41 is provided with a second air outlet 412 facing the first air outlet 11 along the first direction Y. The second air outlet 412 communicates with the fresh air duct 411, and the first direction Y and the second direction X have an included angle.

[0055] Since the first direction Y and the second direction X have an included angle, that is, the length direction of the fresh air duct 411 in the air duct 41 is inconsistent with the opening direction of the second air outlet 412. Taking the case that the first direction Y is the front-back direction and the second direction X is the left-right direction, that is, the air duct 41 and the fresh air duct 411 extend along the left-right direction, and the second air outlet 412 communicating with the fresh air duct 411 is provided on the front side of the air duct 41, so that the fresh air sent 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] That is, the fresh air flow enters the fresh air duct 411 along the second direction X, changes the direction of movement at the second air outlet 412, and makes the fresh air blown out by the second air outlet 412 blow towards the heat exchanger 30 and the first air outlet 11. In the process of the fresh air flow blowing towards the heat exchanger 30 and the first air outlet 11, the return air flow inside the shell 10 also blows towards the heat exchanger 30 and the first air outlet 11 along the first direction, and the flow directions of the fresh air flow and the return air flow are the same or have a small included angle in the mixing area to form a gradual intersection, avoiding direct collision of the two air flows. This mixing method reduces the vortex area generated by the collision of the air flows, is beneficial to reducing the aerodynamic noise and improving the mixing degree of the fresh air flow and the return air flow, so that the temperature field distribution of the air flow blown out by the first air outlet 11 is more uniform. Moreover, due to the same flow direction or small included angle of the fresh air flow and the return air flow, the flow velocities of the fresh air flow and the return air flow can be partially superimposed in the mixing process, so that the mixed air flow has a higher flow velocity when being sent out by the first air outlet 11, which is beneficial to improving the air supply amount.

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

[0058] For example, as shown in Figure 3 and Figure 4 , the number of the second air outlets 412 is at least two and is spaced apart along the second direction X, and the air duct piece 41 is further provided with a fresh air inlet 413 communicating with the fresh air duct 411.

[0059] In this way, the fresh air is sent into the fresh air duct 411 through the fresh air inlet 413, and the fresh air flow is blown out towards the heat exchanger 30 through the at least two second air outlets 412 spaced apart along the second direction X, which is beneficial to improving the uniformity of the distribution of the fresh air flow in the second direction X, thereby improving the uniform mixing degree of the fresh air flow and the return air flow.

[0060] Since the at least two second air outlets 412 are spaced apart along the length direction of the fresh air duct 411, that is, part of the second air outlets 412 are arranged close to the fresh air inlet 413, and the other part of the second air outlets 412 are arranged away from the fresh air inlet 413. Taking the number of the second air outlets 412 as two for example, along the second direction X, one of the second air outlets 412 is arranged close to the fresh air inlet 413, and the other second air outlet 412 is arranged away from the fresh air inlet 413. When the fresh air flow is small, most or all of the fresh air flow will flow out from the one second air outlet 412 close to the fresh air inlet 413, so that there is no fresh air flow or very little fresh air flow at the other second air outlet 412, thereby causing the fresh air flow blown out by the second air outlet 412 to have a very low air speed, and the low air speed is not conducive to the uniform mixing of the fresh air flow and the return air flow.

[0061] Based on this, referring to Figure 4 and Figure 5 , the fresh air assembly 40 further comprises a first air valve 43, which is arranged in the fresh air air duct 411 and connected with the air duct piece 41, and 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 an open state as shown in Figure 5 and a closed state as shown in Figure 4 .

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

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

[0064] In this way, taking the first gear, the second gear, the third gear and the fourth gear in turn as examples of the fresh air volume from low to high, they represent low air volume, medium air volume, high air volume and super-high air volume in turn. When the gear of the fresh air volume is low (such as the first gear and the second gear), the first air valve 43 is controlled to be in the closed state as shown in Figure 4 to close part of the fresh air air duct 411 and the second air outlet 412, so that less fresh air flow can be blown out from part of the second air outlet 412, which is beneficial to improve the air outlet speed of the fresh air flow, and at the same time improve the mixing effect of the fresh air flow and the return air flow, so that more fresh air flow can flow to the heat exchanger at a high speed to improve the heat exchange effect and efficiency of the fresh air flow.

[0065] Correspondingly, when the gear of the fresh air volume is high (such as the third gear and the fourth gear), the first air valve 43 is controlled to be in the open state as shown in Figure 5 so that all the fresh air air ducts 411 and the second air outlets 412 are in a communication state. At this time, the fresh air volume is large, and even if the fresh air flow flows through longer fresh air air ducts 411 and more second air outlets 412, the fresh air flow can still maintain a high speed to make the fresh air flow and the return air flow maintain a good mixing effect and improve the uniform distribution degree of the fresh air flow in the second direction X.

[0066] It should be noted that in the fresh air duct 411, the first air valve 43 is configured to be rotationally connected with the air duct piece 41, that is, the first air valve 43 can be controlled to rotate to open or rotate to block the corresponding fresh air duct 411 and the second air outlet 412 by the driving motor. Wherein, the first air valve 43 can be a single-piece air door structure, which is simple in structure. Alternatively, the first air valve 43 can also be a double-piece structure of a pair of doors, which has a smaller occupied space during the process of rotating to open or block the fresh air duct 411, facilitating flexible arrangement of other structural components.

[0067] Alternatively, the first air valve 43 can also be configured to be slidingly connected with the air duct piece 41, for example, the air duct piece 41 is provided with an air valve gap communicating with the fresh air duct 411, and the first air valve 43 is arranged at the air valve gap. Under the driving of the driving motor or the telescopic air rod, the first air valve 43 is inserted into the fresh air duct 411 through the air valve gap to block the fresh air duct 411. Alternatively, the first air valve 43 is moved out of the fresh air duct 411 through the air valve gap to keep the fresh air duct 411 in an open state.

[0068] In some embodiments, as shown in Figure 4 and Figure 5 , the fresh air assembly 40 further comprises a second air valve 44, which is located at the fresh air inlet 413 and connected with the air duct piece 41 or the shell 10 (as shown in Figure 1 ), for opening or closing the fresh air inlet 413.

[0069] The second air valve 44 refers to an air door structure installed at the fresh air inlet 413, which can be realized by a rotary air door or a translational air door, and is driven by a motor or an air rod to realize the control of opening and closing action.

[0070] As shown in Figure 4 and Figure 5 , the second air valve 44 can also be a double-piece structure of a pair of doors, which has a smaller occupied space during the process of rotating to open or close the fresh air inlet 413, facilitating flexible arrangement of other structural components.

[0071] Among them, the second air valve 44 in the rotary air door structure can be installed in the fresh air duct 411, and in the closed state, the second air valve 44 is approximately flush with the plane where the fresh air inlet 413 is located, so as to close the fresh air inlet. In the open state, the two air doors of the pair of doors rotate towards the inner side of the fresh air duct 411 to open part or all of the fresh air inlet 413.

[0072] Alternatively, the second air valve 44 can also be a single-piece air door structure to switch between the open state and the closed state by rotating movement, which is simple in 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 lower gear, the second air valve 44 is partially opened to keep a high flow speed of the fresh air flow at the fresh air duct 411 and the second air outlet 412, so that more fresh air flow can flow to the heat exchanger 30 for heat exchange, and the fresh air heat exchange efficiency is high.

[0080] In other words, by reducing the opening area at the fresh air inlet 413, the static pressure at the fresh air duct 411 and the second air outlet 412 can be kept high under the condition of a certain fresh air flow, which is beneficial to improve the air speed of the fresh air flow flowing out of the second air outlet 412.

[0081] For example, as shown in Figure 4 and Figure 5 , the second air valve 44 includes a first air door 441 and a second air door 442, which are arranged in a double-door structure in the fresh air duct 411 and are connected with the air duct piece. When the second air valve 44 is in the second open state, the first air door 441 and the second air door 442 are rotated 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°, as shown in Figure 4 , in the second open state, the first air door 441 and the second air door 442 form an angle with the second direction X of the first preset angle. That is, in the closed state shown in Figure 6 , the first air door 441 and the second air door 442 are arranged perpendicular to the second direction X. In the first open state shown in Figure 5 , the first air door 441 and the second air door 442 are arranged parallel to the second direction X.

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

[0084] The air outlet baffle 45 refers to a partition structure arranged at the second air outlet 412 to divide the second air outlet 412 into the first gap 4121 and the second gap 4122 arranged at intervals by the air outlet baffle 45. The air outlet baffle 45 can be an independent component connected to the second air outlet 412 of the air duct piece 41 by screws, rivets, adhesion or welding, etc. Alternatively, the air outlet baffle 45 and the air duct piece 41 are an integral structure to form the second air outlet 412 including the first gap 4121 and the second gap 4122 at the front side of the air duct piece 41.

[0085] The first gap 4121 and the second gap 4122 refer to two independent air outlet areas divided by the air outlet baffle 45, which can be in the form of a rectangular, trapezoidal or arc-shaped opening, for example, two symmetrically distributed rectangular openings. So that the fresh air flow blown out by the second air outlet 412 can flow to different areas through the first gap 4121 and the second gap 4122 arranged at intervals, which is beneficial to improve the uniform mixing degree of fresh air flow and return air flow.

[0086] In addition, the first gap 4121 and the second gap 4122 can be directed towards the heat exchanger of different areas to avoid the fresh air flow being concentrated to part of the heat exchanger 30, which is beneficial to improve the heat exchange efficiency and effect of the fresh air flow and the heat exchanger 30.

[0087] At the same time, the air outlet baffle 45 is arranged so that the first gap 4121 and the second gap 4122 have a smaller opening area, i.e. the opening area of the second air outlet 412 is reduced. For example, the sum of the areas of the first gap 4121, the second gap 4122 and the air outlet baffle 45 is less than or equal to the area of the second air outlet 412.

[0088] In this way, under the condition that the fresh air volume is constant, by reducing the opening area of the second air outlet 412, the fresh air duct 411 has a higher static pressure, so that the fresh air flow has a higher flow rate when blown out from the first gap 4121 and the second gap 4122, so that the fresh air flow can be blown to the heat exchanger 30 faster and more to improve the heat exchange effect and efficiency of the fresh air flow.

[0089] At the second air outlet 412, for example, Figure 1 , Figure 3 and Figure 7As shown, the fresh air assembly 40 further comprises a first air deflector 461 and a second air deflector 462. The first air deflector 461 is rotationally connected with the air duct 41, and is configured to adjust the air outlet direction at the first gap 4121. The second air deflector 462 is rotationally connected with the air duct 41, and is configured to adjust the air outlet direction at the second gap 4122. The first air deflector 461 and the second air deflector 462 are configured to open or close the first gap 4121 and the second gap 4122.

[0090] The first air deflector 461 refers to a plate structure that can rotate around an axis, and can be achieved by a hinge or a rotating shaft connection, and is configured to change the air outlet angle of the air flow discharged from the first gap 4121. The second air deflector 462 refers to a plate structure that can rotate around an axis, and can be achieved by a hinge or a rotating shaft connection, and is configured to change the air outlet angle of the air flow discharged from the second gap 4122.

[0091] The first air deflector 461 and the second air deflector 462 can be driven and controlled by a motor or a pneumatic cylinder, so as to drive the first air deflector 461 and the second air deflector 462 to rotate to a closed state to close the first gap 4121 and the second gap 4122, thereby preventing the fresh air flow from flowing out of the fresh air duct 411 through the first gap 4121 and the second gap 4122.

[0092] Alternatively, the first air deflector 461 and the second air deflector 462 can be controlled to rotate to an open position, so that the fresh air flow in the fresh air duct 411 flows to different regions of the heat exchanger 30 through the first gap 4121 and the second gap 4122, respectively. In this process, the opening angle of the first air deflector 461 and the second air deflector 462 can be continuously adjusted to increase the heat exchange area of the fresh air flow flowing through the heat exchanger 30, so as to improve the heat exchange effect and efficiency of the fresh air flow.

[0093] In other embodiments, the coordinated action of the first air deflector 461 and the second air deflector 462 enables the fresh air flow to be adjusted regionally according to the needs, for example, the two gaps are opened simultaneously when the mixing effect needs to be enhanced, and the air deflection angle of a certain gap is adjusted individually when directional air supply is needed, which is not limited.

[0094] Through the above technical solutions, the present application realizes the independent control of the first gap 4121 and the second gap 4122 at the second air outlet 412. That is, the first gap 4121 and the second gap 4122 can be opened simultaneously when needed, so that the fresh air flow can be directly blown to the heat exchanger 30 for heat exchange through the first gap 4121 and the second gap 4122. Alternatively, the first gap 4121 and the second gap 4122 can be closed by the first air deflector 461 and the second air deflector 462 to prevent the fresh air flow in the fresh air duct 411 from directly blowing to the heat exchanger 30.

[0095] In addition, the first and second air deflectors 461 and 462 are independently controlled to adjust the air deflection angles of the first and second gaps 4121 and 4122, respectively, so as to flexibly adjust the contact range of the fresh air flow with 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, referring to Figure 3 and Figure 7 , at a second air outlet 412, the first and second gaps 4121 and 4122 are spaced apart along a third direction Z, and the first, second and third directions Y, X and Z have an included angle therebetween. Taking the third direction Z as the up-down direction, the first gap 4121, the air outlet baffle 45 and the second gap 4122 are sequentially distributed from top to bottom.

[0097] That is, the first gap 4121 is located above the second gap 4122 along the third direction Z, and the first air deflector 461 is rotated to the preset position as shown. Figure 7 If the first temperature difference AT of the fresh air temperature T1 at the fresh air inlet 413 (as shown in Figure 4 ) and the preset temperature T0 is greater than the first preset value T2, the first air deflector 461 is controlled to continue to rotate in the direction from the closed state to the open state at the preset position.

[0098] Wherein, referring to Figure 7 and Figure 8 , the fresh air angle a at which the first air deflector 461 continues to rotate is proportional to the value of the first temperature difference AT. The first air deflector 461 is rotated along an axis parallel to the second direction X, and the preset position is the position at which the first air deflector 461 is rotated to the angle perpendicular to the third direction Z to open the first gap 4121.

[0099] In the embodiments of the present application, for the convenience of description, taking the first direction Y as the front-rear direction, the second direction X as the left-right direction and the third direction Z as the up-down direction as an example. For example, the second air outlet 412 is located at the front side of the air duct 41, and the first gap 4121 is located above the second gap 4122.

[0100] The preset position refers to the spatial angle at which the first air deflector 461 is rotated to be perpendicular to the third direction Z, that is, the first air deflector 461 is rotated to the horizontal position, at which time the fresh air flow flowing out of the first gap 4121 blows horizontally forward along the first direction Y.

[0101] Wherein, for the first air deflector 461, the angle sensor can be used in cooperation with the driving motor to realize flexible and accurate adjustment of the rotation angle. Alternatively, the driving motor can also be a stepper motor and a servo motor, and after the initial preset parameters are set, no additional angle sensor needs to be set.

[0102] The first temperature difference AT refers to the difference between the fresh air temperature T1 and the preset temperature TO. Specifically, the temperature sensor can be combined with the controller to calculate the first temperature difference AT in real time, and the controller is connected to control the driving motor to adjust the fresh air angle a of the first air deflector 461. The proportional relationship between the fresh air angle a and the first temperature difference AT means that the fresh air angle a of the first air deflector 461 increases linearly with the increase of the first temperature difference AT.

[0103] For example, when the first temperature difference AT is 0℃, the fresh air angle a is 0°. The proportional coefficient between the fresh air angle a and the first temperature difference AT can be set to 10, that is, the fresh air angle a increases by 10° for every 1℃ increase in the temperature difference. Until the maximum fresh air angle a is 90°, the fresh air flow from the first gap 4121 can flow through a larger area of the heat exchanger 30.

[0104] When the indoor unit 100 is in a cooling mode, the first temperature difference AT refers to the value that the fresh air temperature T1 is higher than the preset temperature TO. When the indoor unit 100 is in a heating mode, the first temperature difference AT refers to the value that the fresh air temperature T1 is lower than the preset temperature TO.

[0105] Taking the first air deflector 461 opening to the horizontal state as the reference, the fresh air angle a of the first air deflector 461 continues to rotate in a proportional relationship with the first temperature difference AT, so that when there is no temperature difference or a small temperature difference between the fresh air temperature T1 and the preset temperature TO, the first air deflector 461 is adjusted to a small fresh air angle a, 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, avoiding contact with a larger area of the heat exchanger 30 to be overheated or cooled.

[0106] If there is a large temperature difference between the fresh air temperature T1 and the preset temperature TO, the first air deflector 461 is adjusted to a large fresh air angle a or to a maximum opening state, so that the fresh air flowing out of the first gap 4121 can flow through a larger area of the heat exchanger 30, so that the heat exchanger 30 can sufficiently cool or heat the fresh air flow, so that the mixed air flow flowing out of the first air outlet 11 can be kept in the comfortable interval near the preset temperature TO.

[0107] Therefore, by the above scheme, the application realizes automatic adjustment of the fresh air outlet angle according to the temperature difference, effectively improving the mixing efficiency of cold and hot air. When the temperature difference is large, the rotation angle of the air deflector is increased to accelerate airflow diffusion and increase the contact heat exchange area with the heat exchanger 30, thereby avoiding local high or low temperature. When the temperature difference is small, the angle is reduced to maintain stable air supply, 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 the uniformity of indoor temperature, but also improves the heat exchange efficiency and reduces energy waste, while prolonging the service life of the equipment.

[0108] In some embodiments, as shown in Figure 6 and Figure 9 , the air duct piece 41 is provided with a fresh air inlet 413 at one end in the second direction X. In the fresh air duct 411, the air duct piece 41 is provided with a boss 414 on the side opposite to the fresh air inlet 413 in the second direction X and facing the fresh air inlet 413, and an arc-shaped flow guide part 415 is arranged between the inner wall of the air duct piece 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. The boss 414 can be formed by arranging a protruding part on the inner wall of the fresh air duct 411, or the boss 414 can be formed by stamping the corresponding outer side wall of the air duct piece 41 to recess in the second direction X towards the fresh air inlet 413. The arc-shaped flow guide part 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 air flow will flow towards the boss 414 along the second direction X close to the inner wall of the fresh air duct 411 during the flow in the fresh air duct 411. When the fresh air flow flows to the boss 414, the flow direction will change along the arc-shaped flow guide part 415 around the boss 414, and the flow direction will be reversed along the side wall around the boss 414. Since most of the fresh air flow entering the fresh air duct 411 flows close to the side wall of the fresh air duct 411, the central region of the fresh air duct 411 has a lower air speed, which is beneficial to reduce the turbulence and aerodynamic noise near the boss 414.

[0111] In some embodiments, as shown in Figure 1 and Figure 2 , the shell 10 is provided with a partition plate 12, the partition plate 12 divides the shell 10 into an air inlet cavity 14 and an air outlet cavity 13 along the first direction Y, and the partition plate 12, the air duct piece 41, the heat exchanger 30 and the first air outlet 11 are arranged in the air outlet cavity 13 along the first direction Y. The air duct piece 41 is located in the air outlet cavity 13 and is connected to at least the partition plate 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] The ventilation gaps 15 are spaced apart from the air duct 41 along the third direction Z on the side of the air outlet cavity 13 close to the middle partition 12. Taking the case that the ventilation gaps 15 are above the air duct 41 along the third direction Z as an example, the air duct 41 below the ventilation gaps 15 can make full use of the space layout in the air outlet cavity 13 and will not affect the return air flow blown by the ventilation gaps 15 to the heat exchanger 30.

[0118] In some embodiments, as shown in Figure 1 and Figure 10 , the indoor unit 100 further comprises a fresh air fan 50 located outside the shell 10, and an outlet of the fresh air fan 50 is in communication with the fresh air inlet 413 so as to send the fresh air from the outside through the fresh air inlet 413, the fresh air duct 411 and the second air outlet 412 into the air outlet cavity 13 for mixing and heat exchange.

[0119] It should be noted that, referring to Figure 7 and Figure 11 , the first air baffle 461 and the second air baffle 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, as shown in Figure 11 and Figure 12 , the fresh air assembly 40 further comprises a third air valve 47, and the air duct 41 is provided with a third air outlet 416 communicating with the air outlet cavity 13 (as shown in Figure 10 ). The third air valve 47 is connected with the air duct 41 and is used for opening or closing the third air outlet 416.

[0121] That is, the third air outlet 416 and the second air outlet 412 are located on opposite sides of the air duct 41 along the first direction Y, that is, the second air outlet 412 is located on the front side of the air duct 41. The third air outlet 416 is located on the rear side of the air duct 41, or two or more third air outlets 416 are spaced apart on the rear side of the air duct 41 along the second direction X.

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

[0123] The third air valve 47 refers to a damper structure installed at the third air outlet 416, which can be realized by a rotary damper or a translational damper, and is driven by a motor or an air cylinder to realize the control of opening and closing action.

[0124] As shown in Figure 11 and Figure 12As shown, the third air valve 47 can be a double-piece structure of a double-leaf door, and the third air valve 47 of the double-leaf door structure has a smaller occupied space during rotation to open or close the third air outlet 416, facilitating flexible arrangement of other structural components.

[0125] The third air valve 47 of the rotary air door structure can be installed in the fresh air air duct 411, and in the closed state, the third air valve 47 is approximately flush with the plane where the third air outlet 416 is located to close the third air outlet 416. In the open state, the two double-leaf door structures are rotated towards the inner side of the fresh air air duct 411 to open the third air outlet 416.

[0126] Alternatively, the third air valve 47 can also be a single-piece air door structure to switch between the open state and the closed state by rotating movement, which is simple in structure.

[0127] The third air valve 47 of the rotary structure can be installed in the fresh air air duct 411, and at this time, the third air valve 47 can be rotationally connected with the air duct piece 41 and driven by a motor to switch between the open state and the closed state.

[0128] Alternatively, the third air valve 47 can also be installed outside the fresh air air duct 411. That is, the air duct piece 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 is provided with an air vent corresponding to the third air outlet 416, so that the third air valve 47 can close or open the air vent to adjust the open or closed state of the third air outlet 416. At this time, the third air valve 47 is connected with the partition plate 12, and the third air valve 47 can be configured as a rotary air door structure or a translational air door structure and driven by an electric or actuating component to be in the open state or the closed state, which is not limited.

[0129] In this way, by opening the third air outlet 416 on the side of the air duct piece 41 facing the air inlet cavity 14 and the third air valve 47 for opening or closing the third air outlet 416, the fresh air air duct 411 in the air duct piece 41 can be selectively communicated with the air outlet cavity 13 or the air inlet cavity 14.

[0130] For example, in the refrigeration working condition or the dehumidification working condition, if the fresh air circulation is required to be opened and the fresh air temperature T1 has a large first temperature difference AT with the preset temperature TO, i.e., the first temperature difference is greater than or equal to a second preset value T3, which can be any temperature between 5-15℃. At this time, if the fresh air flows through the second air outlet 412 directly to the heat exchanger 30 for cooling or dehumidification, the part of fresh air will be cooled to a lower temperature at the heat exchanger 30 and generate more condensed water.

[0131] When the air supply position of the indoor unit 100 is high, more condensate water on the heat exchanger 30 will be blown out by the first air outlet 11 under the driving of the high-speed airflow, that is, the blowing water phenomenon of the indoor unit 100 will occur, which will destroy the indoor environment and have poor user experience.

[0132] Based on this, at this time, 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 new air flow in the new air duct 411 can be driven by the indoor fan 20 to flow to the indoor fan 20 through the third air outlet 416, and fully mixed with the return air flow flowing through the indoor fan 20, and the mixed airflow can flow to the heat exchanger 30 through the ventilation gap 15 for cooling and temperature reduction.

[0133] Because the new air flow and the return air flow are fully mixed before flowing through the heat exchanger 30, the temperature of the mixed air flow is less than the new air temperature T1, so that the mixed air flow has a lower temperature reduction during the process of flowing through the heat exchanger 30, and a large amount of condensate water is not precipitated, thereby slowing down or avoiding the blowing water phenomenon of the indoor unit 100.

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

[0135] Taking the indoor fan 20 as an example, as shown in Figure 10 and Figure 12 , the new air assembly 40 further comprises third guide plates 48, and the opposite sides of one third air outlet 416 are respectively provided with third guide plates 48 along the second direction X, and the air inlet of the indoor fan 20 is located between the two third guide plates 48.

[0136] Through the two third guide plates 48 on the left and right sides of the third air outlet 416, the outflowing new air flow is guided and constrained, so that more new air flow can directly flow to the air inlets on the two sides of the axial direction of the indoor fan 20, avoiding the diffusion of the new air flow to a farther place of the air inlet cavity 14, which is beneficial to improve the air supply efficiency of the indoor fan 20 and the new air fan 50.

[0137] For example, as shown in Figure 10 , 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 arranging the third guide plate 48 in the arc-shaped plate structure, the fresh air flow discharged from the third air outlet 416 can flow more towards the air inlets on both sides of the indoor fan 20 in the axial direction, which improves the air supply efficiency of the indoor fan 20 and reduces the starting noise during the change of the flow direction of the fresh air flow.

[0139] In the embodiments of the present application, the indoor unit 100 can be a ducted unit structure or a wall-mounted unit structure. The indoor unit 100 can be applied to an air conditioner, a dehumidifier, or a fresh air system, etc. This is not limited.

[0140] On the other hand, the embodiments of the present application also provide a fresh air conditioner, which comprises the indoor unit 100 in the above aspect. Since the fresh air conditioner comprises the indoor unit 100 in the above aspect, the fresh air conditioner has all the effects of the indoor unit 100 described above, so as to solve the problem of large turbulence and noise when the fresh air and the return air are mixed in the indoor unit, which will not be described here.

[0141] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0142] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to differentiate one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and the like are used herein to describe a variety of elements, components, regions, layers and / or sections, and do not imply a sequence or order unless the context clearly indicates otherwise. Therefore, a first element, component, region, layer or section discussed below can be referred to as a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0143] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. An indoor unit, characterized in that, 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 according to 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 according to 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 according to 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 according to claim 2, characterized in that, 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 in that, 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 according to 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 according to 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. 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 in that, 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 according to claim 9, characterized in that, The indoor unit also includes: An indoor fan is provided, wherein the indoor fan is disposed in the air inlet cavity, the partition plate is provided with a ventilation opening connecting the air inlet cavity and the air outlet cavity, and 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 according to 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 according to 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 conditioning system, characterized in that, Including the indoor unit as described in any one of claims 1-12.

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