Indoor unit and air conditioning system

Abstract

The utility model relates to the technical field of air conditioners, in particular to an indoor unit and an air conditioning system, and aims to solve the problem that an existing indoor unit easily generates abnormal sound due to thermal expansion and cold contraction during startup and shutdown. In order to achieve the purpose, the indoor unit comprises a plurality of air conditioner parts which are connected with one another, and the air conditioner parts are provided with matching surfaces so as to be matched with other air conditioner parts; one of two adjacent matching surfaces is provided with a first micro bulge, and the other one is provided with a second micro bulge; the first micro bulges comprise a plurality of convex strips and / or a plurality of convex points which are sequentially arranged on the matching surface; the second micro-protrusions comprise a plurality of protruding points arranged on the matching face. In the thermal expansion and cold contraction process, the first micro protrusions and the second micro protrusions can transversely expand and contract, the expansion amount and the contraction amount of the air conditioner components are reduced, the displacement amount between the adjacent air conditioner components is reduced, and noise caused by thermal expansion and cold contraction is reduced; and the stress concentration phenomenon of a geometric edge area can be reduced, and contact slippage between air conditioner components is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically providing an indoor unit and an air conditioning system. Background Technology

[0002] With the development of technology and society, air conditioners have become indispensable household appliances. When an air conditioner is turned on or off in cooling or heating mode, the sudden drop or rise in the temperature of the air duct will cause thermal expansion and contraction of the parts, resulting in local relative displacement at the joints and causing intermittent abnormal noises. These noises are inconsistent in intensity, irregular, and last for a long time (approximately 15-20 minutes), which has a significant impact on the user's sleep and product experience.

[0003] Therefore, there is an urgent need for an indoor unit and air conditioning system to solve the above-mentioned technical problems. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem that existing indoor units are prone to making abnormal noises when they are turned on and off due to thermal expansion and contraction.

[0005] In a first aspect, the present invention provides an indoor unit comprising a plurality of interconnected air conditioning components, each air conditioning component having a mating surface for mating with other air conditioning components; on two adjacent mating surfaces, one of the mating surfaces is provided with a first micro-protrusion and the other of the mating surfaces is provided with a second micro-protrusion;

[0006] The first micro-protrusion includes a plurality of raised strips and / or a plurality of raised dots sequentially disposed on the mating surface;

[0007] The second micro-protrusion includes a plurality of protrusions disposed on the mating surface.

[0008] In the specific embodiment of the above-described indoor unit, the protrusion is disposed on the line where the protruding strip is located; and / or

[0009] The protrusions are positioned between two adjacent protrusions.

[0010] In the specific implementation of the indoor unit described above, all the protrusions are the same size.

[0011] In the specific embodiments of the above-described indoor unit, at least some of the protrusions have inconsistent heights; and / or, at least some of the protrusions have inconsistent outer diameters.

[0012] In the specific implementation of the above indoor unit, all the raised strips have the same width and height. ; or

[0013] The widths of two adjacent protrusions are inconsistent; and / or, the heights of two adjacent protrusions are inconsistent.

[0014] In the specific implementation of the above-described indoor unit, the plurality of protruding strips are divided into multiple groups, each group including at least two protruding strips; at least two of the protruding strips in each group have different widths; and / or, at least two of the protruding strips in each group have different heights; and / or

[0015] The convex strip is a strip of equal diameter; or, the convex strip is a strip of variable diameter.

[0016] In the specific embodiment of the above-mentioned indoor unit, the convex strip is arranged in a vertical direction; and / or

[0017] The protrusions are arranged laterally; and / or

[0018] The protrusions are arranged along an inclined direction; and / or

[0019] The raised strips are arranged in a spiral, arc, or circular shape.

[0020] In the specific embodiment of the above-mentioned indoor unit, the air conditioning component includes an air outlet frame, and the surface of the air outlet frame connected to the volute is the mating surface; and / or

[0021] The air conditioning component includes a volute, and the surface on which the volute connects with the air outlet frame, the air inlet grille, and the indoor heat exchange bracket is the mating surface.

[0022] In the specific embodiment of the above-described indoor unit, the air conditioning component includes an air inlet grille, and the surface of the air inlet grille connected to the volute is the mating surface; and / or

[0023] The air conditioning component includes an indoor heat exchange bracket, and the surface on which the indoor heat exchange bracket connects to the volute is the mating surface.

[0024] In a second aspect, the present invention provides an air conditioning system, which includes an indoor unit as described above.

[0025] When the above technical solution is adopted, the indoor unit of this utility model includes multiple interconnected air conditioning components, each air conditioning component having a mating surface for mating with other air conditioning components; micro-protrusions are provided on the mating surface.

[0026] During operation, some air conditioning components vibrate due to airflow impact, causing other components to vibrate as well. The first and second micro-protrusions absorb some of the vibration energy during this process, reducing the vibration amplitude. Furthermore, the spatial gap between the first and second micro-protrusions allows them to expand and contract laterally during thermal expansion and contraction, reducing the amount of expansion and contraction in the air conditioning components and minimizing displacement between adjacent components, thus reducing noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions reduce stress concentration in geometric edge areas, improve contact slippage between adjacent air conditioning components, reduce high-frequency noise, minimize thermal expansion and contraction noise, and improve user experience. Attached Figure Description

[0027] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 1 of this utility model. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 1 of this utility model. Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 1 of this utility model. Figure 3 ;

[0031] Figure 4 This is a schematic diagram of the structure of the second micro-protrusion provided in Embodiment 1 of this utility model. Figure 4 ;

[0032] Figure 5 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 2 of this utility model. Figure 5 ;

[0033] Figure 6 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 2 of this utility model. Figure 6 ;

[0034] Figure 7 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 2 of this utility model. Figure 7 ;

[0035] Figure 8 This is a schematic diagram of the structure of the first micro-protrusion provided in Embodiment 2 of this utility model. Figure 8 .

[0036] List of reference numerals in the attached diagram: 1. Raised bar; 2. Raised dot. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] When an air conditioner is turned on or off in cooling or heating mode, the sudden drop or rise in the temperature of the air duct will cause thermal expansion and contraction of the parts, resulting in localized relative displacement at the joints and causing intermittent abnormal noises. These noises are inconsistent in intensity, irregular, and last for a long time (approximately 15-20 minutes), which can seriously affect the user's sleep and product experience.

[0041] To address the problem of abnormal noises caused by thermal expansion and contraction during the start-up and shutdown of existing indoor units, this utility model discloses an air conditioning system.

[0042] Example 1

[0043] The air conditioning system includes an outdoor unit and an indoor unit. The indoor unit includes multiple interconnected air conditioning components, each with a mating surface for mating with other air conditioning components. Micro-protrusions are provided on these mating surfaces. On two adjacent mating surfaces, one mating surface has a first micro-protrusion, and the other mating surface has a second micro-protrusion.

[0044] In this embodiment, the indoor unit is specifically a floor-standing unit, also known as a floor-standing air conditioner. In other embodiments, it can also be a regular wall-mounted air conditioner, because both floor-standing and wall-mounted air conditioners include a volute, air outlet frame, air inlet grille, and indoor heat exchange bracket, etc., and these components will vibrate and undergo relative displacement when thermal expansion and contraction occur, resulting in abnormal noise. The technical solution of this utility model is also applicable to wall-mounted air conditioners.

[0045] The air conditioning components specifically include a volute, an air outlet frame, an air inlet grille, an indoor heat exchange bracket, an indoor fan, and an outer casing. The volute has an air outlet on its front side, and the air inlet frame is located at the air outlet and fixedly connected to the volute. The air inlet grille is located at the air inlet on the rear side of the volute and is also fixedly connected to the volute. The indoor heat exchanger is mounted on the indoor heat exchange bracket and located behind the air inlet grille; that is, air that has undergone heat exchange in the indoor heat exchanger flows into the volute through the air inlet grille. The indoor fan is located inside the volute and is specifically an axial flow fan, arranged vertically. The outer casing covers the volute and the indoor heat exchanger. An outer casing air outlet is located at the front of the outer casing, directly opposite the air outlet frame. An outer casing air inlet is located at the rear of the outer casing, directly opposite the indoor heat exchanger, and a filter is installed on the outer casing air inlet. After being filtered by the filter, the air flows to the indoor heat exchanger. After being cooled or heated by the indoor heat exchanger, the air then flows into the volute through the air inlet grille. After being transported by the axial flow fan, the air is delivered into the room through the air outlet frame and the air outlet of the outer shell.

[0046] The front end face of the volute is fixedly connected to the air outlet frame. Specifically, connecting ears can be provided on both the air outlet frame and the volute, and the connection is secured by bolts passing through the connecting ears. The connecting surface between the air outlet frame and the volute is a mating surface, and the front end face of the volute, which connects to the air outlet frame, is also a mating surface. One of these mating surfaces has a first micro-protrusion, and the other has a second micro-protrusion. In other words, on both the connecting surface between the air outlet frame and the volute and the front end face of the volute, one surface has a first micro-protrusion, and the other has a second micro-protrusion.

[0047] During operation, air that has undergone heat exchange in the heat exchanger is blown from the air outlet of the volute to the air outlet frame by the indoor fan, and then flows outward through the air outlet frame. Both the volute and the air outlet frame are subject to vibration due to the impact of the airflow. The first and second micro-protrusions absorb some of the vibration energy during this process, reducing the vibration amplitude. Furthermore, the spatial gap between the micro-protrusions allows them to expand and contract laterally during thermal expansion and contraction, reducing the amount of expansion and contraction towards the volute and air outlet frame. This reduces the displacement between the volute and air outlet frame, thus reducing noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions reduce stress concentration in geometric edge areas, improve contact slippage between the volute and air outlet frame, reduce high-frequency noise, minimize the occurrence of thermal expansion and contraction noise, and improve the user experience.

[0048] The air inlet frame is equipped with horizontal louvers, specifically multiple louvers arranged horizontally and spaced vertically. A vertically slidable connecting rod is also mounted on the air inlet frame, connecting the horizontal louvers. Moving the connecting rod up and down causes the horizontal louvers to swing up and down, adjusting the vertical airflow direction of the indoor unit. The air outlet frame is also equipped with vertical louvers, multiple louvers arranged vertically and spaced horizontally. Connecting rods are attached to the vertical louvers; moving the connecting rods horizontally causes the vertical louvers to swing left and right, thus adjusting the left and right airflow direction of the indoor unit. Both the connecting rods and the connecting rods are driven by corresponding motors. The motors driving the connecting rods and the connecting rods cause the corresponding louvers to swing, adjusting the airflow direction.

[0049] Both the volute and the air outlet frame are located inside the outer casing, which has an air outlet. The air outlet frame is located inside the air outlet, and a baffle plate is installed at the air outlet, primarily to block the air outlet. Specifically, a sliding track is provided inside the outer casing, and the baffle plate is slidably mounted on the track. A rack is installed on the baffle plate, and a drive motor and gear are located inside the outer casing. The gear meshes with the rack, and the drive motor drives the gear to rotate, which in turn moves the rack, thereby moving the baffle plate. This allows the baffle plate to no longer block the air outlet, enabling the indoor unit to blow air outwards. Alternatively, the baffle plate can be moved to block the air outlet, preventing dust and other contaminants from entering the indoor unit.

[0050] The air inlet grille is connected to the rear end of the volute, and the rear end face of the volute is fixedly connected to the air inlet grille. Specifically, connecting ears can be provided on the air inlet grille and the volute, and the connection is secured by bolts passing through the connecting ears. The connecting surface between the air inlet grille and the volute is a mating surface, and the rear end face of the volute is also a mating surface. That is, a first micro-protrusion is provided on the connecting surface between the air inlet grille and the volute, and a second micro-protrusion is provided on the rear end face of the volute. During the operation of the indoor unit, the volute and the air inlet frame will be impacted by the airflow and vibrate. Because the first and second micro-protrusions absorb some vibration energy during vibration, the vibration amplitude is reduced. In addition, there is a certain space gap between the micro-protrusions. During thermal expansion and contraction, the micro-protrusions can expand and contract laterally, reducing the amount of expansion and contraction in the direction of the volute and the air outlet frame, thereby reducing the displacement between the volute and the air inlet frame and reducing the noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions can reduce stress concentration in the geometric edge area, improve the contact slip between the volute and the air intake frame, reduce high-frequency noise, reduce the occurrence of thermal expansion and contraction noise, and improve the user experience.

[0051] The indoor heat exchange bracket is connected to the bottom of the volute, specifically by screws securing it to the bottom of the volute. The connection surface between the indoor heat exchange bracket and the volute is the mounting surface, while the connection surface between the volute and the indoor heat exchange bracket is the mating surface. Specifically, a first micro-protrusion is provided on one of these two surfaces, and a second micro-protrusion is provided on the other.

[0052] During operation, the indoor unit's casing vibrates due to airflow impact, causing the indoor heat exchange bracket to vibrate as well. The first and second micro-protrusions absorb some of the vibration energy during this process, reducing the vibration amplitude. Furthermore, the spatial gap between the first and second micro-protrusions allows them to expand and contract laterally during thermal expansion and contraction, reducing the amount of expansion and contraction towards the casing and indoor heat exchange bracket. This minimizes the displacement between the casing and the bracket, reducing noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions reduce stress concentration at geometric edges, improve contact slippage between the casing and the bracket, reduce high-frequency noise, minimize thermal expansion and contraction noise, and enhance the user experience.

[0053] The bottom end of the indoor fan is connected to the indoor heat exchange bracket, and the two are fixedly connected. Specifically, the indoor fan is provided with connecting ears, which are fixed to the indoor heat exchange bracket by bolts to secure the indoor fan and the indoor heat exchange bracket. The connection surface between the indoor fan and the indoor heat exchange bracket is a mating surface, that is, a first micro-protrusion is provided on one of the connection surfaces of the indoor fan and the indoor heat exchange bracket, and a second micro-protrusion is provided on the other. During the operation of the indoor unit, the indoor fan will vibrate, and the indoor heat exchange bracket will also vibrate. Because the first and second micro-protrusions absorb some vibration energy during vibration, the vibration amplitude is reduced. In addition, there is a certain space gap between the first and second micro-protrusions. During thermal expansion and contraction, the micro-protrusions can expand and contract laterally, reducing the amount of expansion and contraction in the direction of the indoor fan and the indoor heat exchange bracket, thereby reducing the displacement between the indoor fan and the indoor heat exchange bracket and reducing the noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions can reduce stress concentration in the geometric edge area, improve the contact slip between the indoor fan and the indoor heat exchange bracket, reduce high-frequency noise, reduce the occurrence of thermal expansion and contraction noise, and improve the user experience.

[0054] The bottom of the indoor heat exchanger is connected to the indoor heat exchange bracket, and the two are fixedly connected. This connection can be achieved using bolts. During operation, the indoor heat exchanger vibrates due to airflow impact, causing the indoor heat exchange bracket to vibrate as well. The first and second micro-protrusions absorb some vibration energy during this process, reducing the vibration amplitude. Furthermore, the spatial gap between the first and second micro-protrusions allows them to expand and contract laterally during thermal expansion and contraction, reducing the amount of expansion and contraction towards the indoor heat exchanger and bracket. This minimizes the displacement between the indoor heat exchanger and bracket, reducing noise caused by thermal expansion and contraction. Moreover, the first and second micro-protrusions reduce stress concentration at geometric edges, improve contact slippage between the indoor heat exchanger and bracket, reduce high-frequency noise, minimize thermal expansion and contraction noise, and improve the user experience.

[0055] The indoor heat exchanger is located behind the air inlet grille. Air first passes through the indoor heat exchanger for heat exchange before flowing to the volute. The air is then blown into the room by the indoor fan through the air outlet frame and the outer casing air outlet. An air inlet grille is located on the back of the outer casing. Indoor air enters the indoor heat exchanger through the air inlet grille and then undergoes heat exchange.

[0056] like Figure 1As shown, the first micro-protrusion includes a plurality of raised strips 1 sequentially disposed on the mating surface; the raised strips 1 can specifically be straight. Regarding the shape of the raised strips 1, it should be noted that although they are straight in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, the raised strips 1 can be wavy, zigzag, arc-shaped, circular, or polygonal, etc., and these will not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0057] The cross-sectional shape of the protrusion 1 is arc-shaped. It should be noted that although the cross-sectional shape of the protrusion 1 is arc-shaped in this embodiment, this is not a limitation of this utility model. Without departing from the principle of this utility model, it can also be triangular, quadrilateral or other polygons in other embodiments. These will not deviate from the basic principle of this utility model and will fall within the protection scope of this utility model.

[0058] In this embodiment, all the protrusions 1 have the same width and height. Regarding the size of the protrusions 1, it should be noted that although the width and height are consistent in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, those skilled in the art can further configure the protrusions 1 in other embodiments as follows: Figure 2 As shown, the widths of two adjacent protrusions 1 are inconsistent; or, the heights of two adjacent protrusions 1 are inconsistent. Multiple protrusions 1 are divided into multiple groups, each group including at least two protrusions 1; at least two of the protrusions 1 in each group have inconsistent widths; or, at least two of the protrusions 1 in each group have inconsistent heights.

[0059] In this embodiment, the protruding strip 1 is a strip of uniform diameter, meaning that the cross-sectional dimensions of the protruding strip 1 are the same at all positions. It should be noted that although the protruding strip 1 is a strip of uniform diameter in this embodiment, this is not a limitation of the present invention. In other embodiments, such as..., without departing from the principle of the present invention, the cross-sectional dimensions of the protruding strip 1 can be... Figure 3 As shown, the protruding strip 1 is a variable-diameter strip; that is, the cross-sectional dimensions of the protruding strip 1 are different at multiple locations. This can all play the role of vibration reduction and reducing thermal expansion and contraction, and therefore falls within the protection scope of this utility model.

[0060] In this embodiment, the protrusion 1 is arranged in a vertical direction. Regarding the arrangement direction of the protrusion 1, it should be noted that although it is arranged in a vertical direction in this embodiment, this is not a limitation of this utility model. Without departing from the principle of this utility model, in other embodiments, those skilled in the art can also choose: the protrusion 1 is arranged in a horizontal direction, or the protrusion 1 is arranged in an inclined direction; or multiple arrangement methods.

[0061] The protrusions 1 on the mating surface can be arranged in one or more ways, and the arrangement of protrusions 1 on different mating surfaces can also be different. The arrangement method refers to the shape, size, direction, and whether the diameter of the protrusions 1 changes, etc.

[0062] like Figure 4 As shown, the second micro-protrusion specifically includes multiple protrusions 2, which are specifically spherical protrusions 2, or pyramidal, ellipsoidal or other shaped protrusions 2.

[0063] The protrusions 2 can be regularly arranged on the mating surface, that is, they can be arranged in rows or in an arc shape on the mating surface.

[0064] All the protrusions are exactly the same shape and size, which makes the mating surfaces look more aesthetically pleasing.

[0065] Regarding the dimensions of the protrusions 2, it should be noted that although all protrusions 2 are identical in this embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, at least some protrusions 2 may have inconsistent heights, or at least some protrusions 2 may have inconsistent outer diameters; or at least some protrusions 2 may have inconsistent heights and some protrusions 2 may have inconsistent outer diameters. These variations do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0066] During operation, some air conditioning components vibrate due to airflow impact, causing other components to vibrate as well. The raised strips 1 and 2 absorb some of the vibration energy, reducing the vibration amplitude. Furthermore, the spatial gap between raised strips 1 and 2 allows them to expand and contract laterally during thermal expansion and contraction, reducing the amount of expansion and contraction in the air conditioning components and minimizing displacement between adjacent components, thus reducing noise caused by thermal expansion and contraction. Moreover, raised strips 1 and 2 reduce stress concentration at geometric edges, improve contact slippage between adjacent components, reduce high-frequency noise, minimize thermal expansion and contraction noise, and improve user experience.

[0067] Example 2

[0068] This embodiment discloses an air conditioning system, the structure of which is basically the same as that of the air conditioning system in Embodiment 1, except that the specific structure of the first micro-protrusion is different.

[0069] Specifically, the first micro-protrusion includes multiple protrusions 2 and multiple protrusions 1, wherein the form of the protrusions 1 is the same as that of the protrusions 1 in Embodiment 1. The form of the protrusions 2 is the same as that in Embodiment 1.

[0070] like Figure 5 ,7 As shown in Figure 8, the protrusion 2 is set on the line where the protrusion 1 is located, that is, the protrusion 2 can cut the protrusion 1. The protrusion 1 can be arranged at intervals along its length.

[0071] Regarding the arrangement of the protrusions 2, it should be noted that although in this embodiment the protrusions 2 are arranged on the protrusions 1, this is not a limitation of the present invention. In other embodiments, such as [examples would be inserted here], without departing from the principle of the present invention, [other arrangements could be made]. Figure 6 As shown, the protrusions 2 are positioned between two adjacent protrusions 1; that is, multiple protrusions 2 arranged in a row are positioned between some of two adjacent protrusions 1. Alternatively, the protrusions 2 can be positioned between some of two adjacent protrusions 1, with the protrusions 1 arranged according to the arrangement in Embodiment 1, but with an avoidance design at the positions where the protrusions 2 are positioned to accommodate them. Or, some of the protrusions 2 are positioned on the protrusions 1, while other protrusions 2 are positioned between two adjacent protrusions 1.

[0072] During operation, some air conditioning components vibrate due to airflow impact, causing other components to vibrate as well. The micro-protrusions absorb some of this vibration energy, reducing the vibration amplitude. Furthermore, the spatial gaps between these micro-protrusions allow for lateral expansion and contraction during thermal expansion and contraction, reducing the amount of expansion and contraction in relation to the air conditioning components. This minimizes displacement between adjacent components and reduces noise caused by thermal expansion and contraction. Moreover, the micro-protrusions reduce stress concentration at geometric edges, improve contact slippage between adjacent components, reduce high-frequency noise, minimize thermal expansion and contraction noise, and enhance the user experience.

[0073] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An indoor unit, characterized by, It includes multiple interconnected air conditioning components, each having a mating surface for mating with other air conditioning components; on two adjacent mating surfaces, one of the mating surfaces has a first micro-protrusion and the other mating surface has a second micro-protrusion. The first micro-protrusion includes a plurality of raised strips and / or a plurality of raised dots sequentially disposed on the mating surface; The second micro-protrusion includes a plurality of protrusions disposed on the mating surface; The air conditioning component includes an indoor heat exchange bracket, and the surface where the indoor heat exchange bracket connects to the volute is the mating surface. The widths of two adjacent protrusions are inconsistent; the heights of two adjacent protrusions are inconsistent; or, the multiple protrusions are divided into multiple groups, each group including at least two protrusions; at least two of the protrusions in each group have inconsistent widths; at least two of the protrusions in each group have inconsistent heights; the protrusions are equal-diameter strips or variable-diameter strips.

2. The indoor unit of claim 1, characterized in that, The protrusion is disposed on the line where the protrusion is located; and / or The protrusions are positioned between two adjacent protrusions.

3. The indoor unit of claim 1, characterized in that, All of the protrusions are the same size.

4. The indoor unit of claim 1, characterized by At least some of the protrusions have inconsistent heights; and / or At least some of the protrusions have inconsistent outer diameters.

5. The indoor unit of claim 1, wherein, The convex strips are arranged vertically; and / or The protrusions are arranged laterally; and / or The protrusions are arranged along an inclined direction; and / or The raised strips are arranged in a spiral, arc, or circular shape.

6. The indoor unit of claim 1, wherein, The air conditioning component includes an air outlet frame, and the surface of the air outlet frame that connects to the volute is the mating surface; and / or The air conditioning component includes a volute, and the surface on which the volute connects with the air outlet frame, the air inlet grille, and the indoor heat exchange bracket is the mating surface.

7. The indoor unit of claim 6, characterized in that, The air conditioning component includes an air intake grille, and the surface where the air intake grille connects to the volute is the mating surface.

8. An air conditioning system characterized by, Including the indoor unit as described in any one of claims 1-7.

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