Indoor unit and air conditioner

Abstract

The utility model relates to the technical field of air conditioners, and discloses an indoor unit and an air conditioner. The indoor unit comprises a shell, an air channel is formed in the shell, and an air vent is formed in the side wall of the air channel and communicates with the interior of the air channel and the exterior of the air channel; the cross-flow fan is located in the air duct; the air duct is communicated between the cross-flow fan and the heat exchanger, and the cross-flow fan and the heat exchanger are sequentially arranged in the flowing direction of air flow in the air duct; and the wind shield is movably arranged at the ventilation opening, can shield the ventilation opening and is used for adjusting the ventilation area of the ventilation opening. The air baffle can adjust the ventilation area of the ventilation opening, and then the discharging speed and the discharging amount of the vortex in the air channel can be adjusted, so that the ventilation opening can be matched with different air field environments in the air channel, and the adjusting precision and the adjusting capacity of the ventilation hole to airflow in the air channel are guaranteed; and air leakage of airflow in the air duct caused by large ventilation area of the ventilation opening or poor flow stabilizing effect caused by small ventilation area of the ventilation opening can be avoided.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, for example to an indoor unit and an air conditioner. Background Technology

[0002] Currently, in suction-type indoor units, the heat exchanger is located on the air intake side of the fan. The airflow after exchanging heat with the heat exchanger flows through the fan and then out of the indoor unit. Suction-type air conditioner indoor units suffer from excessive resistance due to insufficient air intake space, therefore the required air intake space is relatively high, resulting in a larger thickness of the indoor unit.

[0003] To address this, a blower-type indoor unit is disclosed in the related technology, wherein the airflow flows sequentially through a cross-flow fan and a heat exchanger to reduce the space required for air intake, thereby reducing the thickness of the indoor unit.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] In the related technology, the blower-type indoor unit has an increased resistance to airflow because the heat exchanger is located on the air outlet side of the cross-flow fan. The airflow in the duct is affected by the resistance and forms a backflow vortex, which in turn leads to the smooth and turbulent airflow inside the duct.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides an indoor unit and an air conditioner to eliminate backflow vortices in the air duct and force smooth airflow within the air duct.

[0009] This disclosure provides an indoor unit, which includes: a housing with an air duct formed inside the housing, a vent on the side wall of the air duct, the vent connecting the inside of the air duct and the outside of the air duct; a cross-flow fan located inside the air duct; a heat exchanger, the air duct connecting the cross-flow fan and the heat exchanger, and the cross-flow fan and the heat exchanger being arranged sequentially along the airflow direction inside the air duct; and a baffle plate movably disposed at the vent and capable of blocking the vent, used to adjust the ventilation area of ​​the vent.

[0010] Optionally, the indoor unit also includes a drive mechanism, which is connected to the wind deflector drive mechanism for driving the wind deflector to move.

[0011] Optionally, the indoor unit also includes a controller electrically connected to both the drive mechanism and the cross-flow fan, the controller being configured to control the operation of the drive mechanism according to the rotational speed of the cross-flow fan to adjust the position of the baffle.

[0012] Optionally, when the rotational speed of the cross-flow fan is less than or equal to a first rotational speed threshold, the controller is configured to control the drive mechanism to operate so that the baffle moves to a first position and the ventilation area of ​​the vent is the first ventilation area; when the rotational speed of the cross-flow fan is greater than or equal to a second rotational speed threshold, the controller is configured to control the drive mechanism to operate so that the baffle moves to a second position and the ventilation area of ​​the vent is the second ventilation area; wherein the second rotational speed threshold is greater than or equal to the first rotational speed threshold, and the second ventilation area is greater than the first ventilation area.

[0013] Optionally, when the second speed threshold is greater than the first speed threshold, if the speed of the cross-flow fan is greater than the first speed threshold but less than the second speed threshold, the controller is configured to control the drive mechanism to operate so that the baffle moves to the third position and the ventilation area of ​​the vent is the third ventilation area; wherein the third ventilation area is greater than the first ventilation area and less than the second ventilation area.

[0014] Optionally, the length of the wind deflector matches the length of the vent; and / or, the number of wind deflectors is one or more, and when the number of wind deflectors is multiple, the multiple wind deflectors are arranged sequentially along the length or width direction of the vent.

[0015] Optionally, the wind deflector is rotatably disposed at the vent or slidably disposed at the vent; and / or, the vent includes a vent grille, which is elongated.

[0016] Optionally, the vent is located on the side wall in the height direction of the duct, and / or the vent is located on the side wall in the left-right direction of the duct; wherein, when the vent is located on the side wall in the height direction of the duct, the opening length of the vent is greater than or equal to 1 / 3L, where L is the length of the side wall in the height direction of the duct along the left-right direction; and / or, when the vent is located on the side wall in the left-right direction of the duct, the opening length of the vent is greater than or equal to 1 / 3H, where H is the height of the side wall in the left-right direction of the duct.

[0017] Optionally, along the flow direction of the airflow in the duct, the total width of the vent is greater than or equal to 20 mm and less than 50 mm; and / or, the vent is located downstream of the duct.

[0018] This disclosure also provides an air conditioner, which includes an indoor unit as described in any of the above embodiments.

[0019] The indoor unit and air conditioner provided in this disclosure can achieve the following technical effects:

[0020] In this embodiment of the indoor unit, the air duct connects the cross-flow fan and the heat exchanger. An air vent is provided on the side wall of the air duct, connecting the duct to the outside. This allows vortices formed by airflow with high resistance within the duct to be discharged through the air vent, resulting in smoother airflow and a more stable flow field within the duct. A baffle is movable at the air vent, allowing adjustment of the air vent's ventilation area. This, in turn, adjusts the discharge speed and volume of the vortices within the duct, enabling the air vent to match different airflow environments within the duct. This ensures the accuracy and capability of the air vent in regulating the airflow within the duct, and also prevents air leakage due to a large ventilation area or poor airflow stabilization due to a small ventilation area.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a partial structural schematic diagram of an indoor unit provided in an embodiment of this disclosure;

[0024] Figure 2 This is a partial cross-sectional structural diagram of an indoor unit provided in an embodiment of this disclosure;

[0025] Figure 3 This is a partial cross-sectional structural diagram of another indoor unit provided in an embodiment of this disclosure;

[0026] Figure 4 This is a partial cross-sectional structural diagram of another indoor unit provided in an embodiment of this disclosure;

[0027] Figure 5 This is a partial cross-sectional structural diagram of another indoor unit provided in an embodiment of this disclosure;

[0028] Figure 6 This is a partial cross-sectional structural diagram of another indoor unit provided in an embodiment of this disclosure;

[0029] Figure 7 This is a partial structural schematic diagram of another indoor unit provided in an embodiment of this disclosure;

[0030] Figure 8 This is a partial structural schematic diagram of another indoor unit provided in an embodiment of this disclosure;

[0031] Figure 9This is a partial structural schematic diagram of another indoor unit provided in an embodiment of this disclosure;

[0032] Figure 10 This is a schematic diagram of the structure of an indoor unit provided in an embodiment of this disclosure;

[0033] Figure 11 This is a partial structural schematic diagram of another indoor unit provided in an embodiment of this disclosure;

[0034] Figure 12 This is a partial structural schematic diagram of another indoor unit provided in an embodiment of this disclosure.

[0035] Figure label:

[0036] 10. Casing; 11. Air inlet; 12. Air outlet; 14. Side panel; 20. Duct component; 21. Duct; 211. Fan chamber; 212. Diffuser chamber; 213. Heat exchange chamber; 214. First air outlet; 22. Vent; 23. Stepped structure; 24. First vent; 25. Duct side panel; 251. First return air passage; 252. Second return air passage; 30. Cross-flow fan; 40. Heat exchanger; 41. First heat exchange section; 42. Second heat exchange section; 50. Baffle plate; 501. Drive mechanism; 54. Refrigerant pipe; 90. Second vent; 903. Air outlet passage; 904. Second air outlet; 906. Stop plate. Detailed Implementation

[0037] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0038] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0039] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0040] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0041] Unless otherwise stated, the term "multiple" means two or more.

[0042] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0044] Combination Figures 1 to 12 As shown, this disclosure provides an indoor unit, such as... Figures 2 to 4 As shown, the indoor unit includes a casing, a cross-flow fan 30, and a heat exchanger 40. An air duct 21 is formed inside the casing. The cross-flow fan 30 is located inside the air duct 21. The air duct 21 connects the cross-flow fan 30 and the heat exchanger 40, and the cross-flow fan 30 and the heat exchanger 40 are arranged sequentially along the airflow direction inside the air duct 21. A vent 22 is provided on the side wall of the air duct 21, and the vent 22 connects the air duct 21 to the outside of the air duct 21.

[0045] In this embodiment, the cross-flow fan 30 and heat exchanger 40 are arranged along the airflow direction within the duct 21. This reduces the distance between the cross-flow fan 30 and the air inlet 11 of the indoor unit, thus reducing airflow resistance. Furthermore, the heat exchanger 40 is located on the outlet side of the cross-flow fan, increasing the length of the duct 21 on the outlet side of the cross-flow fan 30. This increases the outlet area on the outlet side, allowing for a suitable reduction in the height of the duct 21 on the outlet side of the cross-flow fan 30, thereby reducing the overall thickness of the indoor unit. This facilitates indoor unit installation, reduces ceiling thickness, and improves the user experience. A vent 22 is provided on the side wall of the air duct 21, connecting the interior and exterior of the air duct 21. Since the heat exchanger 40 is located on the outlet side of the cross-flow fan 30, the airflow resistance within the air duct 21 is relatively high, forming airflow vortices. These vortices can be discharged to the exterior of the air duct 21 through the vent 22, thus forcing smoother and more stable airflow within the air duct 21. Once the airflow within the air duct 21 is stable, the noise and airflow within the air duct 21 can be adjusted according to the position, size, and shape of the vent 22 to reduce noise and increase airflow. Furthermore, this embodiment only requires the vent 22 to be provided in the air duct 21, without changing the size and blade shape of the cross-flow fan 30, reducing costs and maintaining the size of the indoor unit, thus improving the versatility of the indoor unit.

[0046] Optionally, such as Figure 1 and Figure 2 As shown, the indoor unit also includes a baffle plate 50, which is movably disposed at the vent 22 and can block the vent 22 to adjust the ventilation area of ​​the vent 22.

[0047] In this embodiment, the baffle 50 can block the vent 22, and the baffle 50 is movable. Thus, the baffle 50 can move to different positions on the vent 22 to block different positions, thereby adjusting the ventilation area of ​​the vent 22. Here, the ventilation area of ​​the vent 22 is adjustable. When the flow velocity, resistance, etc., of the airflow in the duct 21 changes smoothly, the ventilation area of ​​the vent 22 can be adjusted by adjusting the baffle 50. This allows the ventilation area of ​​the vent 22 to match the flow field in the duct 21 in real time, better expelling airflow vortices from the duct 21 and improving the smoothness of airflow within the duct 21.

[0048] Optionally, such as Figure 1 As shown, the indoor unit also includes a drive mechanism 501, which is drivenly connected to the wind deflector 50 and is used to drive the wind deflector 50 to move.

[0049] In this embodiment, the wind deflector 50 is driven by the drive mechanism 501, which enables intelligent control of the wind deflector 50, improves the movement accuracy of the wind deflector 50, and allows for more flexible installation of the wind deflector 50.

[0050] Alternatively, the wind deflector 50 may not be equipped with a drive mechanism 501. The wind deflector 50 can be moved manually to change the ventilation area of ​​the vent 22.

[0051] Optionally, the vent 22 is located downstream of the air duct 21. Here, since the heat exchanger 40 is located downstream of the air duct 21, the airflow resistance in the air duct 21 near the heat exchanger 40 is relatively large, and there are many or large airflow vortices downstream of the air duct 21. These airflow vortices obstruct the airflow within the air duct 21, resulting in a reduction in the flow area within the air duct 21. Therefore, placing the vent 22 downstream of the air duct 21 allows for faster and more complete discharge of airflow vortices, improving the smoothness of airflow.

[0052] Optionally, such as Figures 2 to 4 As shown, the air duct 21 includes a fan chamber 211, a diffuser chamber 212, and a heat exchange chamber 213 connected sequentially along the airflow direction. The cross-flow fan 30 is located in the fan chamber 211, and the heat exchanger 40 is located in the heat exchange chamber 213. Along the airflow direction in the air duct 21, the height of the diffuser chamber 212 gradually increases. This increases the flow area of ​​the diffuser chamber 212, reduces the flow velocity at the center of the air duct 21, and thus reduces the airflow velocity difference between the center and the periphery of the air duct 21, stabilizing the airflow and reducing noise.

[0053] Optionally, the vent 22 is located in the diffuser 212 and / or the heat exchanger 213, so that the vent 22 can be as close as possible to the heat exchanger 40 to discharge the high-pressure airflow vortex.

[0054] Optionally, when the vent 22 is located in the diffuser chamber 212, the vent 22 is located downstream of the diffuser chamber 212.

[0055] Optionally, such as Figures 2 to 4 As shown, the indoor unit also includes a controller, which is electrically connected to both the drive mechanism 501 and the cross-flow fan 30. The controller is configured to control the operation of the drive mechanism 501 according to the rotational speed of the cross-flow fan 30 to adjust the position of the baffle 50.

[0056] In this embodiment, the controller controls the operation of the drive mechanism 501 according to the rotation speed of the cross-flow fan 30. The rotation speed of the cross-flow fan 30 affects the airflow velocity and flow rate in the duct 21, which in turn affects the size and number of airflow vortices in the duct 21. Therefore, the drive mechanism 501 adjusts the position of the baffle plate 50 according to the rotation speed of the cross-flow fan 30. This ensures that the ventilation area of ​​the vent 22 is compatible with the cross-flow fan 30, avoiding air leakage caused by an excessively large ventilation area of ​​the vent 22, and also avoiding insufficient airflow vortices and pressure relief capacity due to a small ventilation area of ​​the vent 22.

[0057] Optionally, such as Figures 2 to 4 As shown, when the rotational speed of the cross-flow fan 30 is less than or equal to a first rotational speed threshold, the controller is configured to control the drive mechanism 501 to operate so that the baffle 50 moves to a first position and the ventilation area of ​​the vent 22 is the first ventilation area; when the rotational speed of the cross-flow fan 30 is greater than or equal to a second rotational speed threshold, the controller is configured to control the drive mechanism 501 to operate so that the baffle 50 moves to a second position and the ventilation area of ​​the vent 22 is the second ventilation area; wherein, the second rotational speed threshold is greater than or equal to the first rotational speed threshold, and the second ventilation area is greater than the first ventilation area.

[0058] In this embodiment, when the rotational speed of the cross-flow fan 30 is less than the first rotational speed threshold, it indicates that the rotational speed of the cross-flow fan 30 is small, the air volume is small, the flow field pressure of the airflow inside the duct 21 is small, and the number or size of the airflow vortices formed inside the duct 21 is small. Therefore, the controller controls the drive mechanism 501 to work, and the drive mechanism 501 controls the baffle plate 50 to block more of the vents 22, reducing the ventilation area of ​​the vents 22. In this way, the airflow vortices inside the duct 21 can still be discharged through the vents 22, avoiding airflow turbulence inside the duct 21, and the vents 22 will not be too large, causing air leakage. When the cross-flow fan 30 increases to a speed greater than or equal to the second speed threshold, the air volume in the duct 21 is large, and the pressure of the flow field inside the duct 21 is relatively large. The number and size of the airflow vortices in the duct 21 are also large. When the baffle plate 50 moves to the second position, the area of ​​the baffle plate 50 blocking the vent 22 decreases, and the ventilation area of ​​the vent 22 increases. This can improve the discharge volume and discharge speed of the airflow vortices in the duct 21, thereby improving the stabilization and pressure relief effects on the airflow in the duct 21.

[0059] Optionally, when the second speed threshold is greater than the first speed threshold, if the speed of the cross-flow fan 30 is greater than the first speed threshold but less than the second speed threshold, the controller is configured to control the drive mechanism 501 to operate so that the baffle 50 moves to the third position and the ventilation area of ​​the vent is the third ventilation area; wherein the third ventilation area is greater than the first ventilation area and less than the second ventilation area.

[0060] In this embodiment of the present disclosure, when the fan is divided into multiple speeds, the fan speed also has multiple ranges. When the fan speed is between the first speed threshold and the second speed threshold, the air volume in the air duct 21 is moderate, the flow field pressure in the air duct 21 is generally moderate, and there are a certain number of airflow vortices. The baffle plate 50 moves to the third position so that the ventilation area of ​​the vent 22 is located between the first ventilation area and the second ventilation area. This can both discharge the airflow vortices in the air duct 21 and avoid excessive ventilation area leading to air leakage.

[0061] Optionally, the baffle 50 can move relative to the vent 22 along the flow direction of the airflow in the air duct 21 to adjust the ventilation area of ​​the vent 22.

[0062] In this embodiment, the baffle plate 50 can move relative to the vent 22 along the flow direction of the airflow in the air duct 21. In this way, when the baffle plate 50 blocks the vent 22, the airflow in the air duct 21 can flow out of the vent 22 evenly in the width direction of the air duct 21, thus avoiding uneven exhaust from the vent 22.

[0063] Optionally, the length of the wind deflector 50 is matched with the length of the vent 22. This synchronizes the movement of the wind deflector 50 along the length of the vent 22, improving the blocking effect.

[0064] Optionally, there can be multiple wind deflectors 50, which are arranged sequentially along the length or width of the vent 22. Alternatively, multiple wind deflectors 50 can be provided, which further improves the flexibility of their blocking capabilities. Based on the flow field within the duct 21, multiple wind deflectors 50 can be controlled to move to the same position or to different positions.

[0065] For example, the movement position of the baffle plate 50 corresponding to the center of the air duct 21 is different from that of the baffle plate 50 corresponding to the periphery of the air duct 21, so that the ventilation area of ​​the vent 22 corresponding to the center of the air duct 21 is smaller than that of the vent 22 corresponding to the periphery of the air duct 21. In this way, the airflow vortex that accumulates more due to the slower flow speed at the periphery of the air duct 21 can be discharged from the air duct 21 more quickly, so that the airflow in the air duct 21 is smoother and the air volume is more uniform.

[0066] It is understood that the wind deflector 50 can also move relative to the vent 22 in other directions, such as along the width of the air duct 21. Any movement direction that can adjust the ventilation area of ​​the vent 22 is an optional embodiment of this application.

[0067] Optionally, the wind deflector can be rotatably or slidably disposed at the vent. Both rotatable and slidable wind deflectors facilitate movement and are easy to install and operate.

[0068] Optionally, the wind deflector 50 is rotatably connected to the side wall of the air duct 21, or the wind deflector 50 is slidably connected to the side wall of the air duct 21.

[0069] In this embodiment, when the baffle plate 50 is rotatably connected to the side wall of the air duct 21, one side of the vent 22 at one end of the baffle plate 50 is also rotatably connected. The baffle plate 50 can be rotated to block the vent 22, or it can be rotated to fully open the vent 22. The baffle plate 50 is also slidably connected to the side wall of the air duct 21, which also allows the vent 22 to be opened or blocked. Optionally, grooves are provided on both sides of the vent 22, and the two ends of the baffle plate 50 are slidably located within the grooves to achieve a slidable connection between the baffle plate 50 and the side wall of the air duct 21.

[0070] Optionally, the indoor unit also includes a storage box located on one side of the vent. The wind deflector can be stored inside the storage box or extend out of the storage box to block the vent. This facilitates the storage of the wind deflector.

[0071] Alternatively, when the wind deflector is stored in the storage box, the wind deflector can be rolled up for storage, or the wind deflector includes multiple telescopic panels that can be retracted into the storage box.

[0072] Optionally, the wind deflector 50 is located on the side of the vent 22 away from the air duct 21, which facilitates the maintenance and replacement of the wind deflector 50, as well as the installation, maintenance and replacement of the drive mechanism 501.

[0073] Optionally, the drive mechanism 501 is connected to at least one end of the wind deflector 50 along its length.

[0074] Optionally, when the wind deflector 50 is rotatably connected to the side wall of the air duct 21, the two opposite side walls of the air duct 21 are provided with rotation holes, and the two ends of the wind deflector 50 are provided with two rotation shafts respectively. The rotation shafts are located in the rotation holes, and at least one rotation shaft is connected to the drive mechanism 501. The drive mechanism 501 is used to drive the rotation shaft to rotate in the rotation hole.

[0075] Optionally, the drive mechanism 501 is connected to the side wall of the air duct 21 away from the air duct 21 to fix the drive mechanism 501.

[0076] Optionally, such as Figures 2 to 6 As shown, the vent 22 is located on the side wall of the air duct 21 in the height direction.

[0077] In this embodiment, when the vent 22 is located on the side wall of the air duct 21 in the height direction, that is, the vent 22 can be located on the top wall and / or bottom wall of the air duct 21. This results in a larger dimension of the top or bottom wall of the air duct 21 in the width direction. Opening the vent 22 on the top and / or bottom wall of the air duct 21 allows for the rapid, uniform, and large-volume discharge of airflow vortices, thus quickly improving the airflow smoothness within the air duct 21. This ensures the flow area of ​​the air duct 21 and prevents the eccentric vortex of the cross-flow fan 30 from moving away from the volute tongue due to excessive resistance within the air duct 21. The eccentric vortex remains stable in its original position, and its area does not increase. This ensures the effective air outlet area within the cross-flow fan 30, thereby guaranteeing airflow and improving the static pressure resistance of the air duct 21.

[0078] Optionally, such as Figures 7 to 9 As shown, the vent 22 is located on the side wall of the air duct 21 in the left and right directions.

[0079] In this embodiment, the vent 22 is located on the left side wall and / or the right side wall of the air duct 21. This allows airflow vortices to be discharged from the left and / or right side of the air duct 21. Due to high resistance, airflow vortices form within the air duct 21, and some of these vortices can cause significant noise within the air duct 21. The vent 22, located on the left and / or right side wall of the air duct 21, can discharge these noise-affecting vortices, thereby forcing smooth airflow within the air duct 21 and reducing noise. Furthermore, because the air duct 21 is relatively wide in the left-right direction, the airflow is uneven in this direction. A greater amount of airflow tends to converge at the left and right ends of the air duct 21, resulting in more airflow vortices that come into contact with the left and right sides of the air duct 21, leading to more noise. Therefore, the vent 22, located on the left and / or right side wall of the air duct 21, can better reduce noise.

[0080] Optionally, when the vent 22 is located on the side wall of the air duct 21 in the height direction, the opening length of the vent 22 is greater than or equal to 1 / 3L, where L is the length of the side wall of the air duct 21 in the height direction along the left-right direction; and / or, when the vent 22 is located on the side wall of the air duct 21 in the left-right direction, the opening length of the vent 22 is greater than or equal to 1 / 3H, where H is the height of the side wall of the air duct 21 in the left-right direction. Here, as... Figure 6 As shown, the up, down, left, and right directions are as follows: Figure 6 As shown, the height direction refers to the vertical direction.

[0081] In this embodiment, the opening length of the vent 22 affects its ventilation area. When the vent 22 is located on the top wall and / or bottom wall of the duct 21, the length of the vent 22 is not less than 1 / 3 of the length of the bottom wall and / or top wall of the duct 21. This avoids the vent 22 being too short, which would affect the ventilation and pressure relief effect, ensuring the discharge volume and speed of the airflow vortex, and guaranteeing the air volume. When the vent 22 is located on the left side wall and / or right side wall of the duct 21, the opening length of the vent 22 is not less than 1 / 3 of the height of the left side wall and / or right side wall of the duct 21. This ensures the exhaust volume in the left and right directions of the duct 21, thereby guaranteeing the noise reduction effect and avoiding the vent 22 being too short, which would affect the exhaust volume and thus the noise reduction effect.

[0082] Optionally, the vent 22 is inclined along the flow direction of the airflow in the duct 21, which can increase the flow area of ​​the vent 22. When the vent 22 is inclined, the opening length of the vent 22 refers to the length of the vent 22 in the extension direction.

[0083] Optionally, along the flow direction of the airflow in the duct 21, the total width of the vent 22 is greater than or equal to 20 mm and less than 50 mm.

[0084] In this embodiment, when the total width of the vent 22 is less than 20mm, the vent 22 is too narrow, affecting the exhaust volume and increasing exhaust resistance. When the total width of the vent 22 is greater than or equal to 50mm, the vent 22 is too wide, making it prone to air leakage and affecting the airflow and normal operation of the indoor unit.

[0085] For example, the total width of the vent 22 can be 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 49mm, etc.

[0086] Optionally, the vent 22 includes one or more vent grilles.

[0087] In this embodiment, the vent 22 is configured as a strip-shaped vent grille. Compared with a perforated structure, this can increase the ventilation area, reduce the airflow resistance of the vent grille, improve the exhaust effect and exhaust volume, effectively reduce the vortex in the air duct 21, reduce noise and increase air volume.

[0088] Optionally, when the vent 22 is multiple vent grilles, the total width of the vent 22 refers to the sum of the widths of the multiple vent grilles.

[0089] Optionally, the ventilation grille is angled and forms an angle with the horizontal direction.

[0090] In this embodiment, the number of ventilation grilles can be varied depending on the air duct 21. The ventilation grilles are angled, which further increases their exhaust area, improves exhaust efficiency and speed, and enhances noise reduction and flow field stability. Furthermore, the ventilation grilles can be angled along the airflow direction within the air duct 21, further improving airflow removal. Optionally, in practical applications, the ventilation grilles can be angled upwards or downwards along the airflow direction within the air duct 21. The angle of the ventilation grilles can be adjusted according to the configuration of the heat exchanger 40 during actual use. Preferably, the first heat exchange section and the ventilation grilles are angled in the same direction along the airflow direction within the air duct 21.

[0091] Preferably, the vent grille is arranged parallel to the heat exchanger 40. In this way, the vortex formed by the airflow in the duct 21 flowing towards the heat exchanger 40 corresponds to the structure of the heat exchanger 40. The parallel arrangement of the vent grille with the heat exchanger 40 allows for the discharge of more of the vortex in the duct 21.

[0092] Optionally, such as Figure 11 and Figure 12 As shown, the heat exchanger 40 includes a first heat exchange section 41, which is a straight plate and is inclined upward or downward along the flow direction of the airflow in the air duct 21.

[0093] In this embodiment, the heat exchanger 40 includes a straight-plate-shaped first heat exchange section 41, which is inclined upwards or downwards along the airflow direction within the duct 21. This allows the heat exchanger 40 to meet the required heat exchange area by adjusting the tilt angle, while also preventing excessive height and thus reducing the thickness of the indoor unit. The indoor unit of this embodiment, through the arrangement of the cross-flow fan 30, the heat exchanger 40, and the inclined straight-plate-shaped first heat exchange section 41, ensures both heat exchange area and heat exchange effect while reducing the thickness of the indoor unit. This also reduces the thickness of the ceiling, freeing up more indoor space, reducing the feeling of confinement, and improving the user experience.

[0094] In some alternative embodiments, the heat exchanger 40 is an integral plate type.

[0095] In this embodiment, the heat exchanger 40 is generally a straight plate type, which makes the production of the heat exchanger 40 simple, the cost low, and the processing easy.

[0096] In some alternative embodiments, the heat exchanger 40 further includes a second heat exchange section 42 connected to the first heat exchange section 41, and the connection between the second heat exchange section 42 and the first heat exchange section 41 forms an angle.

[0097] In this embodiment of the disclosure, the heat exchanger 40 may also be in other shapes, which can increase the area of ​​the heat exchanger 40 and improve the heat exchange capacity.

[0098] Optionally, the angle between the first heat exchange section 41 and the second heat exchange section 42 is oriented towards the cross-flow fan 30, which can further increase the heat exchange area and improve the heat exchange capacity.

[0099] Optionally, the second heat exchange section 42 and the first heat exchange section 41 are arranged vertically, which allows for flexible adjustment of the area of ​​the heat exchanger 40, ensuring both the heat exchange area and the amount of heat exchanged. For example, ... Figure 11 As shown, heat exchanger 40 is V-shaped, as... Figure 12 As shown, heat exchanger 40 is L-shaped.

[0100] Optionally, the first heat exchange section 41 and the second heat exchange section 42 are arranged sequentially along the flow direction of the airflow, which can also increase the heat exchange area and improve the heat exchange effect.

[0101] Optionally, such as Figures 1 to 7 as well as Figure 10 As shown, the housing includes a casing 10 and an air duct component 20. The casing 10 defines a receiving cavity with an air inlet 11 and an air outlet 12. A cross-flow fan 30 and a heat exchanger 40 are sequentially arranged within the receiving cavity from the air inlet 11 to the air outlet 12. The air duct component 20 is located within the receiving cavity and defines an air outlet duct 21, which connects the cross-flow fan 30 and the heat exchanger 40. Here, the casing 10 is fitted over the outside of the air duct component 20, and the air outlet duct 21 is defined inside the air duct component 20. The inlet of the air duct 21 is located within the receiving cavity and communicates with the air inlet 11, while the outlet of the air duct 21 is located within the receiving cavity and communicates with the air outlet 12. In this way, the casing 10 can be used to house other components besides the air duct component 20. In addition, the casing 10 can protect the air duct component 20 from damage caused by external environmental factors, preventing air leakage and other issues.

[0102] Optionally, the air inlet 11 is located on the front side of the bottom wall of the shell, and the air outlet 12 is located on the rear side wall of the shell, and the air outlet 12 corresponds to the heat exchanger 40, so that the airflow after passing through the heat exchanger 40 can flow directly out from the air outlet 12.

[0103] Optionally, such as Figure 8 As shown, Figure 8The middle arrow indicates the flow direction of airflow in the first return air passage 251 and the second return air passage 252. When the vent 22 is located on the side wall of the air duct 21 in the left and right directions, the vent on the left side wall and / or the right side wall of the air duct 21 is defined as the first vent 24. The first return air passage 251 is defined between the left side wall of the housing 10 and the air duct component 20 and / or the right side wall of the air duct 21. The first return air passage 251 connects the first vent 24 and the air inlet 11 so that the airflow from the first vent 24 can flow through the first return air passage 251 to the air inlet 11; and / or, the left side wall and / or the right side wall of the air duct component 20 define the second return air passage 252. The second return air passage 252 connects the first vent 24 and the air inlet 11 so that the airflow from the first vent 24 can flow through the second return air passage 252 to the air inlet 11.

[0104] In this embodiment, the airflow discharged from the first vent 24 flows back to the air inlet 11 through the first return air channel 251 and / or the second return air channel 252. Here, both the first return air channel 251 and the second return air channel 252 are located inside the casing 10. That is to say, the airflow in the air duct 21 flowing out of the first vent 24 will not flow into the environment outside the casing 10, but will return to the air inlet 11 inside the casing 10 for another circulation. Since the indoor unit is located inside the ceiling, the space inside the ceiling is relatively enclosed. The airflow from the first vent 24 will not be discharged to the outside of the indoor unit, that is, it will not enter the ceiling, will not affect the pressure inside the ceiling, and will not cause airflow turbulence inside the ceiling that would cause dust to fly. The dust inside the ceiling will not enter the air duct 21 through the first vent 24, thus avoiding dust entering the air duct 21 and affecting the operation of the fan, thereby ensuring the normal operation of the indoor unit.

[0105] Optionally, when the first return air passage 251 is defined between the left side wall of the housing and the air duct component 20 and / or the right side wall of the air duct 21, the housing 10 includes a side plate 14 located outside the left side wall and / or the right side wall of the air duct 21, and the side plate 14 and the left side wall and / or the right side wall of the air duct 21 enclose the first return air passage 251.

[0106] In this embodiment, the side plate 14 and the left side wall of the air duct component 20 and / or the right side wall of the air duct 21 can directly enclose the first return air channel 251, so that the side plate 14 can prevent the airflow from the first vent 24 from flowing to the outside of the housing 10.

[0107] Optionally, when the left side wall and / or the right side wall of the duct component 20 defines the second return air passage 252, the duct component 20 includes a duct component body and a duct side plate 25. The duct component body defines the duct 21. The duct side plate 25 is connected to the duct component body and is located outside the first vent 24. The duct side plate 25 and the duct component body enclose the second return air passage 252.

[0108] In this embodiment, the duct component 20 itself can also define the second return air channel 252. The duct side plate 25 is located outside the first vent 24. In this way, when there are other components between the duct component 20 and the side plate 14, the duct side plate 25 can prevent the airflow from the first vent 24 from flowing to other components, and can ensure that the airflow discharged from the first vent 24 can flow to the air inlet 11 through the second return air channel 252.

[0109] Optionally, the refrigerant pipe 54 connected to the heat exchanger 40 is located on the side of the air duct side plate 25 away from the air duct body. In this way, the air duct side plate 25 can prevent the airflow from the first vent 24 from exchanging heat with the refrigerant pipe 54, and prevent the temperature change of the refrigerant medium in the refrigerant pipe 54 from affecting the normal operation of the indoor unit.

[0110] Optionally, when the vent 22 is located on the top wall and / or bottom wall of the air duct 21, the vent 22 on the top wall and / or the top wall of the air duct 21 is defined as the second vent 90. The housing 10 and the air duct component 20 define an air outlet channel 903, which connects the second vent 90 and the outside of the housing 10, so that the airflow in the air duct 21 is discharged to the outside of the housing 10 through the second vent 90 and the air outlet channel 903. Figure 5 As shown, the thick arrow indicates the airflow direction within the air duct 21, and the thin arrow indicates the airflow direction within the air outlet duct 903.

[0111] In this embodiment, the airflow discharged from the second vent 90 is discharged to the outside of the casing 10 through the air outlet 903, which is beneficial to the indoor airflow circulation speed of the indoor unit and speeds up the time for the indoor unit to reach the desired temperature.

[0112] Optionally, such as Figure 5 and Figure 6 As shown, the air outlet 12 includes a first air outlet 214 and a second air outlet 904. The first air outlet 214 is connected to the outlet of the air duct 21, and the second air outlet 904 is connected to the outlet of the air outlet channel 903. The first air outlet 214 and the second air outlet 904 are arranged adjacent to each other.

[0113] In this embodiment, the airflow discharged from the second vent 90 is discharged to the outside of the casing 10 through the second air outlet 904, and the heat exchange airflow in the air duct 21 is discharged to the outside of the casing 10 through the first air outlet 214. This allows air to also be discharged from the second air outlet 904, which can improve the indoor circulation speed and speed up the indoor temperature rise time. In addition, the first air outlet 214 and the second air outlet 904 are arranged adjacent to each other, so that the air discharged from the first air outlet 214 and the second air outlet 904 can be mixed. This can form a uniform airflow, which can prevent the airflow temperature at the air outlet 12 from being too low and improve user comfort.

[0114] Optionally, the first air outlet 214 and the second air outlet 904 are located on the same side wall of the housing. This facilitates the arrangement of the first air outlet 214 and the second air outlet 904.

[0115] Optionally, when the air outlet 12 is located on the rear or front side wall of the housing, the first air outlet 214 and the second air outlet 904 are arranged sequentially in the vertical direction.

[0116] Optionally, the second vent 90 is located on the top wall of the air duct 21. Since a water receiving tray is provided below the heat exchanger 40, the second vent 90 is opened on the top wall of the air duct 21. This allows the second vent 90 to be located close to the heat exchanger 40, improving the pressure relief amount and effect, and preventing interference with the water receiving tray.

[0117] Optionally, when the second vent 90 is located on the top wall of the air duct 21, the top wall of the housing 10 and the top wall of the air duct component 20 enclose an air outlet channel 903. The air outlet channel 903 extends along the flow direction of the airflow within the air duct 21 and is located above the air duct 21. Furthermore, the second air outlet 904 is located above the first air outlet 214. This allows the airflow from the second air outlet 904 to accelerate the airflow from the first air outlet 214, thereby increasing the circulation speed of the indoor airflow. Additionally, the location of the second air outlet 904 above the first air outlet 214 facilitates even airflow between the two outlets, improving airflow comfort.

[0118] Optionally, the second air outlet 904 is provided with a guide plate, which is movably disposed in the second air outlet 904. The guide plate is used to adjust the air outlet direction of the second air outlet 904. When the second air outlet 904 emits air, the guide plate can tilt towards the first air outlet 214 along the air outlet direction of the second air outlet 904. In this way, the guide plate can guide the airflow from the second air outlet 904 to the first air outlet 214, so as to achieve uniform air outlet 12.

[0119] Optionally, the indoor unit also includes a support rib, which is located in the air outlet duct 903 and connected between the outer wall of the air duct component 20 and the inner wall of the casing 10. The support rib extends along the airflow direction in the air outlet duct 903 and divides the air outlet duct 903 into multiple guide channels. Each guide channel is connected between the outlet of the second vent 90 and the outlet of the air outlet duct 903.

[0120] In this embodiment, the supporting ribs are positioned between the outer wall of the air duct component 20 and the inner wall of the housing 10. This increases the strength of the housing and prevents deformation of the housing 10 and the air duct component 20. Simultaneously, the supporting ribs divide the airflow into multiple guide channels, facilitating the flow of air discharged from the second vent 90 to the outside of the housing 10, thus preventing airflow blockage within the air outlet duct 903.

[0121] Optionally, there are multiple support ribs, which are arranged sequentially at intervals along the length of the air duct 21. This can improve the strength of the housing 10 and the air duct component 20, and can separate multiple airflow channels, making the airflow in the length of the air duct 21 more uniform.

[0122] Optionally, the support ribs are connected between multiple ventilation grilles. In this way, the support ribs can not only guide the airflow out of the ventilation grilles, but also strengthen the side wall of the air duct 21 and prevent the side wall of the air duct 21 from deforming.

[0123] Optionally, the indoor unit also includes a baffle 906, which is disposed in the air outlet duct 21 and is connected between the outer wall of the duct component 20 and the inner wall of the housing 10. The baffle 906 is located on the side of the second vent 90 away from the outlet of the air outlet duct 903.

[0124] In this embodiment of the present disclosure, the baffle 906 is located on the side of the second vent 90 away from the outlet of the air outlet channel 903, so that the baffle 906 can prevent the airflow from flowing toward the side away from the outlet of the air outlet channel 903, so that the airflow discharged from the second vent 90 can flow out through the air outlet channel 903 and the second air outlet 904.

[0125] Optionally, such as Figures 2 to 4 As shown, part of the wall of the air duct 21 protrudes into the air duct 21 to form a stepped structure 23, which is used to prevent the airflow in the air duct 21 from flowing back.

[0126] In this embodiment, the stepped structure 23 prevents airflow backflow within the duct 21. Since the heat exchanger 40 is located on the outlet side of the cross-flow fan 30, the airflow resistance at the heat exchanger 40 is relatively high. The airflow near the heat exchanger 40 at the end of the duct 21 experiences resistance and partially backflows along the boundary of the duct 21, leading to turbulent flow and higher noise levels within the duct 21. By providing the stepped structure 23 within the duct 21, which protrudes inwards, the stepped structure 23 prevents airflow backflow, thus forcing smooth airflow within the duct 21. This reduces noise within the duct 21 and consequently reduces the noise of the indoor unit. Furthermore, the stepped structure 23 prevents airflow backflow and avoids airflow turbulence within the duct 21, stabilizing the internal airflow field and ensuring the airflow volume of the indoor unit.

[0127] Optionally, the stepped structure 23 includes one or more steps. When the stepped structure 23 includes multiple steps, the height of the multiple steps gradually increases along the direction from the heat exchanger 40 to the cross-flow fan 30.

[0128] In this embodiment of the disclosure, the step structure 23 can be provided with one step or multiple steps. When multiple steps are provided, the height of the step protrusion gradually increases along the direction away from the heat exchanger 40. In this way, multiple steps can gradually guide the airflow to form an airflow vortex, avoid the formation of intense airflow collisions in the air duct 21, thereby effectively reducing noise, avoiding the surge noise caused by airflow backflow, and ensuring the smooth flow of air in the air duct 21 to ensure the air outlet effect.

[0129] Optionally, when the vent 22 and the stepped structure 23 are located on the same side wall of the air duct 21, the vent 22 and the step are arranged sequentially along the airflow direction within the air duct 21. In this way, the airflow vortex within the air duct 21 can be discharged from the vent 22, and the returning airflow is blocked by the step and flows back along the wall, which can improve the noise reduction effect and discharge the vortex, ensuring airflow.

[0130] Optionally, when the stepped structure 23 includes multiple steps, the vent 22 is located between two adjacent steps. This way, when the vent 22 is closed, the airflow upstream of the vent 22 can be reduced in noise by the step structure 23. Alternatively, when the vent 22 is open, the vortex within the duct 21 is discharged from the vent 22. The returning airflow, after passing the vent 22, will stop flowing back due to the obstruction of the step structure 23, and then flow out of the vent 22 or towards the heat exchanger 40, further improving the smoothness of airflow within the duct 21.

[0131] This disclosure also provides an air conditioner, which includes an indoor unit as described in any of the above embodiments.

[0132] The air conditioner of this disclosure includes the indoor unit of any of the above embodiments, and therefore has the beneficial effects of the indoor unit of any of the above embodiments, which will not be repeated here.

[0133] Optionally, the air conditioner also includes an outdoor unit, which is connected to the indoor unit via refrigerant piping. The indoor unit can be a ducted air conditioner or other types of air conditioners.

[0134] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An indoor unit, characterized by, The indoor unit comprises: a shell, a wind channel is formed inside the shell, a side wall of the wind channel is provided with a ventilation opening, and the ventilation opening communicates the inside of the wind channel and the outside of the wind channel; a cross-flow fan located in the wind channel; a heat exchanger, the wind channel is communicated between the cross-flow fan and the heat exchanger, and the cross-flow fan and the heat exchanger are sequentially arranged along the flow direction of the airflow in the wind channel; a wind shield movably arranged at the ventilation opening and capable of shielding the ventilation opening, for adjusting the ventilation area of the ventilation opening.

2. The indoor unit of claim 1, characterized in that, Further comprising: a driving mechanism in driving connection with the wind shield, for driving the wind shield to move.

3. The indoor unit of claim 2, characterized in that, Further comprising: a controller in electrical connection with the driving mechanism and the cross-flow fan, the controller is configured to control the operation of the driving mechanism according to the rotating speed of the cross-flow fan, so as to adjust the position of the wind shield.

4. The indoor unit according to claim 3, wherein in the case that the rotating speed of the cross-flow fan is less than or equal to a first rotating speed threshold, the controller is configured to control the driving mechanism to work so as to move the wind shield to a first position and make the ventilation area of the ventilation opening be a first ventilation area; in the case that the rotating speed of the cross-flow fan is greater than or equal to a second rotating speed threshold, the controller is configured to control the driving mechanism to work so as to move the wind shield to a second position and make the ventilation area of the ventilation opening be a second ventilation area; wherein the second rotating speed threshold is greater than or equal to the first rotating speed threshold, and the second ventilation area is greater than the first ventilation area.

5. The indoor unit according to claim 4, wherein in the case that the rotating speed of the cross-flow fan is greater than the first rotating speed threshold and less than the second rotating speed threshold when the second rotating speed threshold is greater than the first rotating speed threshold, the controller is configured to control the driving mechanism to work so as to move the wind shield to a third position and make the ventilation area of the ventilation opening be a third ventilation area; wherein the third ventilation area is greater than the first ventilation area and less than the second ventilation area.

6. The indoor unit according to claim 1, wherein the length of the wind shield matches the length of the ventilation opening; and / or the number of the wind shield is one or more, and when the number of the wind shield is more, the plurality of wind shields are sequentially arranged along the length or width direction of the ventilation opening.

7. The indoor unit according to claim 1, wherein the wind shield is rotatably arranged at the ventilation opening or slidably arranged at the ventilation opening; and / or the ventilation opening comprises a ventilation grille, and the ventilation grille is in a strip shape.

8. The indoor unit according to claim 1, wherein the ventilation opening is arranged at the side wall in the height direction of the wind channel, and / or the ventilation opening is arranged at the side wall in the left-right direction of the wind channel; wherein when the ventilation opening is arranged at the side wall in the height direction of the wind channel, the opening length of the ventilation opening is greater than or equal to 1 / 3L, wherein L is the length of the side wall in the height direction of the wind channel along the left-right direction; and / or when the ventilation opening is arranged at the side wall in the left-right direction of the wind channel, the opening length of the ventilation opening is greater than or equal to 1 / 3H, and H is the height of the side wall in the left-right direction of the wind channel.

9. The indoor unit according to any one of claims 1 to 8, wherein the total width of the ventilation opening is greater than or equal to 20 mm and less than 50 mm along the flow direction of the airflow in the wind channel; and / or the ventilation opening is located at the downstream of the wind channel.

10. An air conditioner characterized by comprising: The indoor unit comprises the indoor unit according to any one of claims 1 to 9.

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