Indoor unit and air conditioner

Abstract

The present application discloses an indoor unit and an air conditioner. The indoor unit (10) comprises a housing assembly (100) and an electric control box (200). The housing assembly (100) has a top wall surface (111), a bottom wall surface (112), and a back wall surface (121). The top wall surface (111) is inclined in a direction away from the back wall surface (121) and toward the bottom wall surface (112). The electric control box (200) is arranged in the housing assembly (100) and is connected to the housing assembly (100). The electric control box (200) comprises a box body (210) and a circuit board (220) arranged in the box body (210). The circuit board (220) comprises a first side edge (221) close to the top wall surface (111). The first side edge (221) is inclined in the direction away from the back wall surface (121) and toward the bottom wall surface (112).

Description

Indoor units and air conditioners

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent applications filed on December 17, 2024, with application number 202411866552.0 entitled "Indoor Unit and Air Conditioner" and application number 202423129448.1 entitled "Indoor Unit and Air Conditioner", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of air conditioning technology, and in particular to an indoor unit and an air conditioner. Background Technology

[0004] The indoor unit of an air conditioner contains an electrical control box, which includes a box body and a circuit board housed within the box. The indoor unit controls other electronic components via the circuit board. Due to the limited internal space of existing indoor units, the available space for the circuit board is small, resulting in a high density of various electrical control components on the board, thus increasing the cost of the circuit board. Summary of the Invention

[0005] The main purpose of this application is to propose an indoor unit and air conditioner that can make more rational use of the internal space of the indoor unit to increase the size of the circuit board and thus reduce the cost of the circuit board.

[0006] To achieve the above objectives, a first aspect of this application provides an indoor unit, comprising:

[0007] A housing assembly having a top wall surface, a bottom wall surface, and a back wall surface, wherein the top wall surface is inclined toward the bottom wall surface in a direction away from the back wall surface; and

[0008] An electrical control box is disposed within and connected to the housing assembly, the electrical control box including a box body and a circuit board disposed within the box body;

[0009] The circuit board includes a first side edge near the top wall surface, and the first side edge is inclined towards the bottom wall surface in a direction away from the back wall surface.

[0010] In some embodiments, the top wall surface has a first end line near the back wall surface and a second end line away from the back wall surface, the plane in which the first end line and the second end line are located is a reference plane, and the angle between the reference plane and the back wall surface is α; the line connecting the end of the first side away from the back wall surface and the end near the back wall surface is a reference line, and the angle between the reference line and the back wall surface is b; wherein, α ≤ b < 90°.

[0011] In some embodiments, the circuit board further includes a second side near the bottom wall surface, the second side being arranged parallel to the first side.

[0012] In some embodiments, the circuit board further includes a third side near the back wall, the third side having a first end near the top wall and a second end near the bottom wall, the distance between the first end and the back wall being greater than the distance between the second end and the back wall.

[0013] In some embodiments, the circuit board further includes a fourth side facing away from the back wall surface, the fourth side having a third end near the top wall surface and a fourth end near the bottom wall surface, the distance between the third end and the back wall surface being greater than the distance between the fourth end and the back wall surface.

[0014] In some embodiments, the circuit board includes a substrate and electronic devices connected to the substrate, wherein the side of the substrate near the top wall is the first side, and the substrate is a rectangular plate.

[0015] In some embodiments, the housing assembly includes a front frame and a chassis, the chassis being disposed within the front frame, the chassis having a back wall surface, and the front frame having a top wall surface and a bottom wall surface; the chassis includes a side wing portion located on one side of the chassis in a transverse direction parallel to the back wall surface, and the electrical control box is connected to the side wing portion.

[0016] In some embodiments, the housing includes an electrical control shell, an intermediate support, and a display shell. The circuit board is disposed inside the electrical control shell. The intermediate support is located on the side of the electrical control shell away from the back wall, and the end of the intermediate support away from the bottom wall is connected to the electrical control shell. The display shell is connected to the end of the electrical control shell near the bottom wall. The indoor unit also includes a display component electrically connected to the circuit board, and the display component is disposed inside the display shell.

[0017] In some embodiments, the indoor unit further includes an air supply assembly, the air supply assembly includes a drive motor, the side wing includes a motor bracket connected to the drive motor; the electronic control housing is located on the side of the motor bracket away from the bottom wall, the intermediate bracket is located on the side of the motor bracket away from the back wall, and the display housing is at least partially located between the motor bracket and the bottom wall.

[0018] In some embodiments, the indoor unit further includes a heat exchange assembly connected to the chassis and located on one side of the side wing in a lateral direction. The end of the heat exchange assembly near the side wing includes a first pipe and a second pipe, the second pipe being located on the side of the first pipe facing away from the back wall.

[0019] In some embodiments, the outer side of the face frame further has a first side wall located between the top wall and the bottom wall, the first side wall being located on the side of the wing away from the heat exchange assembly, and the minimum distance between the first pipe and the first side wall being less than the minimum distance between the second pipe and the first side wall.

[0020] In some embodiments, the housing includes a second sidewall facing the heat exchange assembly, and the second sidewall is inclined away from the first sidewall in a direction away from the back wall.

[0021] In some embodiments, when viewed along a direction perpendicular to the back wall, both the first conduit and the second conduit at least partially overlap with the second side wall.

[0022] In some embodiments, when viewed along a direction perpendicular to the back wall, the second conduit is spaced apart from the second side wall, and the first conduit at least partially overlaps with the second side wall.

[0023] In some embodiments, the side wing includes a limiting plate located between the heat exchange assembly and the housing, and the second side wall surface is attached to the limiting plate away from the side wall of the heat exchange assembly.

[0024] In some embodiments, the electrical control box further has a third sidewall facing away from the heat exchange assembly, the third sidewall being parallel to the first sidewall.

[0025] In some embodiments, the housing has an internal cavity, the circuit board is disposed in the cavity, and the width of the cavity gradually increases in a direction perpendicular to the first side wall, away from the back wall.

[0026] In some embodiments, the electrical control box further includes wiring terminals and connecting wires. The wiring terminals are located on the side of the receiving cavity away from the back wall, and the circuit board is located on the side of the wiring terminals facing the back wall. The connecting wires are electrically connected to the wiring terminals and the circuit board, respectively.

[0027] In some embodiments, the housing has an internal cavity, the circuit board is disposed in the cavity, the housing includes a main body connected to the housing assembly and a cover plate connected to the main body, the cover plate and the main body together form the cavity, and the cover plate is located on the side of the main body away from the heat exchange assembly.

[0028] In some embodiments, the electrical control box further includes wiring terminals and connecting wires, the wiring terminals being disposed within the receiving cavity, and the connecting wires being electrically connected to the wiring terminals and the circuit board respectively.

[0029] In some embodiments, the cover plate includes a first plate and a second plate, the first plate and the second plate being detachably connected to the box body, and when viewed along a direction perpendicular to the first side wall, the first plate covers at least a portion of the wiring terminals and at least a portion of the connecting wires, and the second plate covers at least a portion of the circuit board.

[0030] A second aspect of this application provides an air conditioner, comprising:

[0031] The indoor unit described in the above embodiments; and

[0032] An outdoor unit, wherein the indoor unit is connected to the outdoor unit.

[0033] Compared with the prior art, the beneficial effects of this application are:

[0034] In the technical solution of this application, the indoor unit includes a housing assembly and an electrical control box. The housing assembly has a top wall, a bottom wall, and a back wall. The top wall is inclined towards the bottom wall in a direction away from the back wall. The electrical control box is located inside and connected to the housing assembly, and includes a box body and a circuit board housed within the box body. In the prior art, the internal space of the indoor unit is limited, resulting in a small usable space for the circuit board and a high density of electrical control components on the circuit board, leading to high circuit board costs. The circuit board in this solution includes a first side near the top wall, which is inclined towards the bottom wall in a direction away from the back wall. This means the circuit board is inclined to fit the top wall, fully utilizing the space below the top wall, increasing the circuit board's volume, reducing the density of electrical control components, and lowering the circuit board cost. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 is a schematic diagram of an indoor unit according to an embodiment of this application; wherein, the top wall, bottom wall, back wall and front panel of the housing assembly are shown;

[0037] Figure 2 is an exploded view of the indoor unit in one embodiment of this application; wherein, the front frame, chassis and electrical control box are shown;

[0038] Figure 3 is a side view of an indoor unit according to an embodiment of this application; wherein, a cover plate, an electrical control housing, a middle bracket, a display housing, and an air supply assembly are shown.

[0039] Figure 4 is a side view of an indoor unit according to an embodiment of this application; wherein, the housing and circuit board are shown;

[0040] Figure 5 is a schematic diagram of an indoor unit in one embodiment of this application; wherein, the solid rectangle represents the circuit board of the embodiment of this application, and the dashed rectangle represents the circuit board before the improvement of this application;

[0041] Figure 6 is an exploded view of the indoor unit in one embodiment of this application; wherein, the heat exchange components, chassis and electrical control box are shown;

[0042] Figure 7 is a top view of an indoor unit according to an embodiment of this application; wherein, a first pipe, a second pipe, a second side wall, and a third side wall are shown;

[0043] Figure 8 is a structural schematic diagram of the electrical control box in one embodiment of this application; wherein, the intermediate bracket, display shell and cover plate are shown.

[0044] Figure 9 is a schematic diagram of the electrical control box in one embodiment of this application; wherein, the cover plate is removed and the circuit board and wiring terminals are shown.

[0045] Reference numerals: Indoor unit 10; Housing assembly 100; Face frame 110; Top wall surface 111; First end line 1111; Second end line 1112; Reference surface 1113; Bottom wall surface 112; First side wall surface 113; Chassis 120; Back wall surface 121; Side wing 122; Limiting plate 1221; Motor bracket 1222; Front panel 130; Electrical control box 200; Box body 210; Electrical control housing 211; Intermediate bracket 212; Display housing 213; Second side wall surface 214; Third side wall surface 215; Receiving cavity 216; Wiring terminal 217; Box body 218; Cover plate 219; First plate 2191; Second plate 2192; Circuit board 220; First side 221; Second side 222; Third side 223; First end 2231; Second end 2232; Fourth side 224; Third end 2241; Fourth end 2242; Baseline 225; Substrate 226; Electronic device 227; Display assembly 230; Shielding shell 240; Air supply assembly 300; Drive motor 310; Heat exchange assembly 400; First pipeline 410; Second pipeline 420.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] The indoor unit of an air conditioner contains an electrical control box, which includes a box body and a circuit board inside the box. The indoor unit controls other electronic components through the circuit board. Existing indoor units include a front frame and a chassis located within the front frame. The front frame has a top wall and a bottom wall, and the chassis has a back wall. During installation, the chassis is connected to the wall, and the back wall is flush against the wall. In existing indoor units, the top wall of the front frame is angled; specifically, the vertical height of the top wall decreases as it moves further away from the back wall. With this top wall arrangement, the angled top wall prevents the indoor unit from touching the ceiling due to excessive installation height. In other words, regardless of the installation height, there is sufficient clearance between the top wall of the indoor unit and the ceiling to facilitate air intake from the top. On the other hand, the indoor unit may also include a front panel connected to the front side of the frame. The front panel is rotatably connected to the frame and can rotate relative to the frame and flip upwards. When there is a gap between the indoor unit and the ceiling, the front panel can easily flip upwards, preventing positional interference between the front panel and the ceiling from preventing it from opening.

[0049] In related technologies, the control box is located within the front frame and connected to the chassis. The circuit board of the control box is a rectangular plate, and the thickness direction of the circuit board is parallel to the back wall and bottom wall. To facilitate finding a reference point during installation, the control box is positioned with the back wall as the reference. In this case, the front and rear sides of the circuit board are parallel to the back wall, and the top and bottom sides are perpendicular to the back wall. However, the internal space of the indoor unit is limited, resulting in a small usable space for the circuit board and a high density of electrical components on the circuit board, leading to higher circuit board costs. Because the space above the circuit board is angled, it is difficult to utilize the space above the circuit board; furthermore, because the space below the circuit board needs to accommodate the drive motor, it is also difficult to utilize the space below the circuit board; and when the height of the circuit board needs to meet certain size requirements, the front space of the circuit board is also difficult to utilize. In summary, the existing layout of the control box makes it difficult to increase the size of the circuit board, resulting in a high density of electrical components on the circuit board and thus higher costs.

[0050] In view of this, the first aspect of this application proposes an indoor unit 10 that can make more reasonable use of the internal space of the indoor unit 10, increase the volume of the circuit board 220 to reduce the arrangement density of electronic control components, and thus reduce costs. The indoor unit 10 of the present application embodiment will be described below with reference to Figures 1 to 9. Specifically, the indoor unit 10 includes a housing assembly 100 and an electronic control box 200.

[0051] Referring to Figures 1 and 2, the housing assembly 100 defines a cavity for accommodating the electrical control box 200. The housing assembly 100 has a top wall surface 111, a bottom wall surface 112, and a back wall surface 121, the specific structure of which may vary depending on the actual situation. It should be noted that, in this embodiment, the top wall surface 111, the bottom wall surface 112, and the back wall surface 121 are all referenced to the arrangement of the indoor unit 10 in the working state. For example, referring to the orientation in Figure 1, the top wall surface 111 may be the upper wall surface of the housing assembly 100, the bottom wall surface 112 may be the lower wall surface of the housing assembly 100, and the back wall surface 121 may be the right wall surface of the housing assembly 100 (the back wall surface 121 is actually the wall surface that is attached to the vertical wall after the indoor unit 10 is installed or has a small gap with the vertical wall).

[0052] Referring to Figures 1 and 5, the specific arrangement of the top wall surface 111 is described below. Along the direction away from the back wall surface 121, the top wall surface 111 is arranged inclined towards the bottom wall surface 112. In other words, along the direction close to the back wall surface 121, the top wall surface 111 is arranged inclined away from the bottom wall surface 112. Referring to the orientation in Figure 5, that is, along the direction from right to left, the top wall surface 111 is arranged inclined downwards. The inclined arrangement of the top wall surface 111 in this design allows for sufficient clearance between the top wall surface 111 and the ceiling above it, facilitating air intake for the indoor unit 10 from the top.

[0053] Referring to Figures 1 to 5, the specific configuration of the electrical control box 200 is described below. The electrical control box 200 is located within the housing assembly 100, and its specific location can be determined according to actual conditions. The electrical control box 200 can be connected to the housing assembly 100. It is understood that the electrical control box 200 can be detachably connected to the housing assembly 100 to facilitate replacement and maintenance of the electrical control box 200. The electrical control box 200 includes a housing 210 and a circuit board 220, with the circuit board 220 located inside the housing 210.

[0054] Referring to Figure 5, the relative arrangement of the control box 200 and the housing assembly 100 is described below. The circuit board 220 of the control box 200 is arranged at an angle relative to the bottom wall surface 112 of the housing assembly 100. Specifically, the circuit board 220 includes a first side 221 near the top wall surface 111. Along the direction away from the back wall surface 121, the first side 221 is arranged at an angle towards the bottom wall surface 112. In other words, along the direction near the back wall surface 121, the first side 221 is arranged at an angle away from the bottom wall surface 112. Referring to the orientation of Figure 5, the first side 221 is the upper side of the circuit board 220. Along the direction from right to left, the first side 221 is arranged at an angle downwards, and the specific angle of inclination of the first side 221 can be determined according to the actual situation.

[0055] In the technical solution of this application, the indoor unit 10 includes a housing assembly 100 and an electrical control box 200. The housing assembly 100 has a top wall surface 111, a bottom wall surface 112, and a back wall surface 121. The top wall surface 111 is inclined towards the bottom wall surface 112 in a direction away from the back wall surface 121. The electrical control box 200 is disposed within and connected to the housing assembly 100, and includes a box body 210 and a circuit board 220 disposed within the box body 210. In the prior art, the top wall surface above the circuit board is inclined, making it difficult to utilize the space above the circuit board; the space below the circuit board needs to accommodate a drive motor, making it difficult to utilize the space below the circuit board; and when the height of the circuit board needs to meet corresponding size requirements, the front space of the circuit board is also difficult to utilize. That is, the available space on the circuit board is small, the arrangement density of the various electrical control components on the circuit board is large, resulting in a high cost for the circuit board. The circuit board 220 of this solution includes a first side 221 near the top wall surface 111. Along the direction away from the back wall surface 121, the first side 221 is inclined towards the bottom wall surface 112, meaning the circuit board 220 is adapted to the inclined arrangement of the top wall surface 111. Therefore, this solution can adapt to the structure and position layout of the housing assembly 100 and the drive motor 310, fully utilizing the upper, lower, and front spaces of the circuit board 220, increasing the arrangement volume of the circuit board 220, reducing the density of the electronic control components, and lowering the cost of the circuit board 220. For example, referring to FIG5, compared to existing circuit boards (the components indicated by the dashed lines in FIG5), this solution can maximize the length of the circuit board 220 while maintaining its height dimension, thus effectively increasing the volume of the circuit board 220.

[0056] Referring to Figure 5, a reference plane 1113 is defined for easier description and understanding of the specific tilt arrangement of the circuit board 220. Specifically, the top wall surface 111 has a first end line 1111 and a second end line 1112 arranged opposite to each other. The first end line 1111 is the end line of the top wall surface 111 near the back wall surface 121, and the second end line 1112 is the end line of the top wall surface 111 away from the back wall surface 121. Referring to the orientation of Figure 5, the right end line of the top wall surface 111 is the first end line 1111, and the left end line of the top wall surface 111 is the second end line 1112. It should be noted that in the view of Figure 5, the first end line 1111 and the second end line 1112 are both point-like, and the reference plane 1113 is line-like. The plane where the first end line 1111 and the second end line 1112 are located is the reference plane 1113. It can be understood that in some embodiments, the top wall surface 111 can be an arc surface. In some embodiments, the top wall surface 111 may also be a straight plane. In other embodiments, the top wall surface 111 has both an arc surface and a straight plane. Some embodiments of this application are described using the example of the top wall surface 111 being an arc surface. It can be understood that when the top wall surface 111 is a straight plane, the plane on which the top wall surface 111 is located is the reference plane 1113.

[0057] Referring to Figure 5, the relative tilting arrangement of the reference surface 1113 and the back wall surface 121 is described below. In some embodiments, the back wall surface 121 can be arranged vertically. The included angle between the reference surface 1113 and the back wall surface 121 is α, where α < 90°. For example, α can be 75°, 77°, 80°, or 85°, etc. The reference surface 1113 and the back wall surface 121 of this solution adopt the above-mentioned tilting angle, which can provide sufficient clearance between the top wall surface 111 and the upper ceiling to facilitate air intake of the indoor unit 10 from the top, prevent the front panel 130 of the housing assembly 100 from interfering with the upper ceiling when it is flipped relative to the face frame 110, and provide sufficient space for the circuit board 220.

[0058] It should be noted that in some embodiments, the first side 221 can be a straight line. In other embodiments, the first side 221 can also be a curve. In other embodiments, the first side 221 can also be a line combining a straight line and a curve. Some embodiments of this application are illustrated using the example of the first side 221 being a straight line.

[0059] Referring to Figure 5, the tilt setting of circuit board 220 is described below. To facilitate description and understanding of the specific tilt angle of the first side 221 of circuit board 220, a reference line 225 is defined. The line connecting the end of the first side 221 away from the back wall surface 121 and the end closest to the back wall surface 121 is defined as reference line 225. Taking the orientation in Figure 5 as an example, that is, the line connecting the left and right ends of the first side 221 is reference line 225 (when the first side 221 is a straight line segment, the straight line containing the first side 221 is reference line 225). The angle between reference line 225 and the back wall surface 121 is b. Where a ≤ b < 90°, in other words, both reference line 225 and reference surface 1113 are tilted, and the tilt angle of reference line 225 is less than or equal to the tilt angle of reference surface 1113. For example, when a is 75°, b can be 75°, 77°, 80°, or 85°, etc. The first side 221 of this solution adopts the above-mentioned tilt angle, which can adapt to the structure and position layout of the housing assembly 100 and the drive motor 310, make full use of the upper space, lower space and front space of the circuit board 220, increase the arrangement volume of the circuit board 220, reduce the arrangement density of the electronic control components, and reduce the cost of the circuit board 220.

[0060] It should be noted that in some embodiments, 'a' can be equal to 'b'. In other embodiments, 'a' can be less than or greater than 'b'. The relative size of 'a' and 'b' depends on the actual situation. Some embodiments of this application are illustrated using 'a' equal to 'b' as an example.

[0061] Referring to FIG5, in some embodiments, the circuit board 220 is arranged at an angle relative to the bottom wall surface 112. Specifically, the circuit board 220 includes a second side 222 near the bottom wall surface 112. In some embodiments, the second side 222 can be a straight line. In other embodiments, the second side 222 can also be a curve. In other embodiments, the second side 222 can also be a line combining a straight line and a curve. This application embodiment is illustrated by taking an example where the second side 222 has the same shape as the first side 221.

[0062] The second side 222 is arranged parallel to the first side 221. That is, the tilt direction and tilt angle of the second side 222 relative to the bottom wall surface 112 can be the same as those of the first side 221. Therefore, along the direction away from the back wall surface 121, the second side 222 is tilted towards the bottom wall surface 112. Referring to the orientation of Figure 5, the second side 222 is the lower side of the circuit board 220, and along the direction from right to left, the first side 221 is tilted downwards. In this solution, the first side 221 and the second side 222 of the circuit board 220 are parallel, which means that the circuit board 220 has a regular structure that is easy to process, and allows the circuit board 220 to make full use of its lower space, preventing it from interfering with the drive motor 310.

[0063] The arrangement of the circuit board 220 relative to the back wall 121 is described below. In some embodiments, the circuit board 220 includes a third side 223 near the back wall 121. Referring to the orientation of FIG5, the right side of the circuit board 220 is the third side 223. The third side 223 includes a first end 2231 and a second end 2232 arranged opposite to each other. The first end 2231 is the end of the third side 223 near the top wall 111, and the second end 2232 is the end of the third side 223 near the bottom wall 112. Referring to the orientation of FIG5, the first end 2231 can be the upper end of the third side 223, and the second end 2232 can be the lower end of the third side 223. The distance between the first end 2231 and the back wall 121 is greater than the distance between the second end 2232 and the back wall 121, that is, the third side 223 is arranged at an angle relative to the back wall 121. This solution enables the circuit board 220 to make full use of its front space, increase the layout volume of the circuit board 220, reduce the layout density of electronic control components, and reduce the cost of the circuit board 220.

[0064] The arrangement of the circuit board 220 relative to the back wall 121 is described below. In some embodiments, the circuit board 220 includes a fourth side 224 facing away from the back wall 121. The fourth side 224 includes a third end 2241 and a fourth end 2242 arranged opposite to each other. The third end 2241 is the end of the fourth side 224 near the top wall 111, and the fourth end 2242 is the end of the fourth side 224 near the bottom wall 112. Referring to the orientation of FIG5, the third end 2241 can be the upper end of the fourth side 224, and the fourth end 2242 can be the lower end of the fourth side 224. The distance between the third end 2241 and the back wall 121 is greater than the distance between the fourth end 2242 and the back wall 121, that is, the fourth side 224 is arranged at an angle relative to the back wall 121. This solution enables the circuit board 220 to make full use of its front space, increase the arrangement volume of the circuit board 220, reduce the arrangement density of the electronic control components, and reduce the cost of the circuit board 220.

[0065] Referring to Figure 9, the specific configuration of the circuit board 220 in some embodiments is described below. The circuit board 220 includes a substrate 226 and electronic components 227. The substrate 226 can be connected to the electronic components 227. It is understood that the electronic components 227 include resistors, capacitors, or inductors, and the specific configuration of the electronic components 227 can be determined according to the actual situation. The side of the circuit board 220 near the top wall surface 111 is the first side 221. Referring to the orientation of Figure 5, the upper side of the circuit board 220 is the first side 221. It should be noted that in some embodiments, the substrate 226 can be a rectangular plate. In other embodiments, the substrate 226 can also be a parallelogram plate. Some embodiments of this application are described using a rectangular plate as an example. The rectangular plate structure of this solution is simple and easy to process. By arranging the rectangular plate at an angle, the internal space of the indoor unit 10 can be fully utilized, allowing the rectangular plate to have a larger volume, reducing the density of the electronic control components, and reducing the cost of the circuit board 220.

[0066] Referring to Figures 1 to 5, the specific structure of the housing assembly 100 is described below. In some embodiments, the housing assembly 100 includes a front frame 110 and a chassis 120. The chassis 120 may be disposed within the front frame 110. Specifically, the front frame 110 may be snapped or screwed to the chassis 120. The chassis 120 has a back wall surface 121 facing away from the electrical control box 200. The front frame 110 has a top wall surface 111 at the top and a bottom wall surface 112 at the bottom. In other embodiments, the housing assembly 100 also includes a front panel 130, which may be connected to the front side of the front frame 110. In this embodiment, the top wall surface 111 of the front frame 110 is arranged at an angle, which allows for sufficient clearance between the front frame 110 and the ceiling, facilitating air intake of the indoor unit 10 from the top, preventing positional interference between the front panel 130 and the ceiling when it is flipped relative to the front frame 110, and also provides sufficient space for the inclined arrangement of the circuit board 220.

[0067] Referring to Figures 2 to 4, the specific structure of the chassis 120 is described below. The chassis 120 includes a side wing 122, which is located on one side of the chassis 120 in a transverse direction parallel to the back wall 121. Referring to the orientation of Figure 6, the side wing 122 can be located on the right side of the chassis 120. The electrical control box 200 can be connected to the side wing 122. In some embodiments, the chassis 120 also includes a base plate at the bottom, and the side wing 122 can be integrally arranged with the base plate. In this solution, the electrical control box 200 is connected to the side wing 122, which allows the electrical control box 200 to be stably installed in the limited space inside the indoor unit 10, optimizing the internal spatial structure layout of the indoor unit 10.

[0068] Referring to Figures 6 to 9, the specific structure of the housing 210 is described below. The housing 210 includes a central control shell, a central support 212, and a display shell 213. In some embodiments, the control shell 211, the central support 212, and the display shell 213 can all be arranged independently. In other embodiments, the control shell 211, the central support 212, and the display shell 213 can also be interconnected. In other embodiments, any two of the control shell 211, the central support 212, and the display shell 213 can be interconnected, while the third can be arranged independently. The specific arrangement of the housing 210 can be determined according to the actual situation. Some embodiments of this application are illustrated using the interconnection of the control shell 211, the central support 212, and the display shell 213 as an example.

[0069] Referring to Figure 9, the circuit board 220 can be housed within the electrical control housing 211. The intermediate bracket 212 can be located on the side of the electrical control housing 211 facing away from the back wall 121. The end of the intermediate bracket 212 facing away from the bottom wall 112 can be connected to the electrical control housing 211. Referring to the orientation of Figure 8, the intermediate bracket 212 can be located on the left side of the electrical control housing 211, and its upper end can be connected to the electrical control housing 211. The display housing 213 is connected to the end of the electrical control housing 211 near the bottom wall 112; referring to the orientation of Figure 8, the display housing 213 can be connected to the lower end of the electrical control housing 211. It should be noted that the indoor unit 10 also includes a display component 230, which can be electrically connected to the circuit board 220. The display component 230 can be housed within the display housing 213. The above-mentioned arrangement makes the internal structure of the control box 200 more compact and facilitates the installation and maintenance of the display component 230. The intermediate bracket 212 can strengthen the structural strength of the control shell 211 and provide support for the control shell 211, ensuring the stability of the assembly connection of the control shell 211.

[0070] Referring to Figures 3 to 6, in some embodiments, the indoor unit 10 further includes an air supply assembly 300, which can supply air to the indoor unit 10. It is understood that the air supply assembly 300 has a drive motor 310, and a motor bracket 1222 can be mounted on the side wing 122 of the chassis 120, the motor bracket 1222 being connected to the drive motor 310. It should be noted that the electrical control housing 211 can be located on the side of the motor bracket 1222 opposite to the bottom wall surface 112, and the intermediate bracket 212 can be located on the side of the motor bracket 1222 opposite to the back wall surface 121. Referring to the orientation in Figure 6, the electrical control housing 211 can be located on the upper side of the motor bracket 1222, and the intermediate bracket 212 can be located on the front side of the motor bracket 1222. The display housing 213 can be at least partially located between the motor bracket 1222 and the bottom wall surface 112; the specific location of the display housing 213 can be determined according to the actual situation. It is understandable that the intermediate bracket 212 can be detachably connected to the motor bracket 1222.

[0071] The drive motor 310 of the air supply assembly 300 in this solution is connected to the side wing 122 of the chassis 120. That is, when the drive motor 310 is inspected and maintained, it can be directly removed or adjusted from the chassis 120, preventing interference from the electrical control housing 211, the intermediate bracket 212 and the display housing 213. This optimizes the internal space layout of the indoor unit 10, and the intermediate bracket 212 can provide support for the electrical control housing 211, ensuring the stability of the assembly and connection of the electrical control box 200.

[0072] Referring to Figures 2 and 6, the specific configuration of the heat exchange assembly 400 is described below. In some embodiments, the indoor unit 10 includes a heat exchange assembly 400, which is used for heat exchange. The heat exchange assembly 400 is connected to the chassis 120; specifically, the heat exchange assembly 400 can be detachably connected to the chassis 120. The heat exchange assembly 400 is located on one side of the side wing 122 of the chassis 120 along the lateral direction. Referring to the orientation of Figure 2, the heat exchange assembly 400 is located on the left side of the side wing 122 of the chassis 120. It should be noted that the end of the heat exchange assembly 400 near the side wing 122 includes a first pipe 410 and a second pipe 420. The second pipe 420 is located on the side of the first pipe 410 facing away from the back wall surface 121. Taking the orientation of Figure 7 as an example, the pipe on the lower side of the heat exchange assembly 400 is the second pipe 420, and the pipe on the upper side of the heat exchange assembly 400 is the first pipe 410. It should be noted that in some embodiments, the structure of the first conduit 410 may be the same as that of the second conduit 420. In other embodiments, the structure of the first conduit 410 may also be different from that of the second conduit 420. Some embodiments of this application are illustrated using the example of the different structures of the first conduit 410 and the second conduit 420.

[0073] Referring to Figures 1 and 2, the specific configuration of the frame 110 is described below. The outer side of the frame 110 has a first sidewall 113, located between the top wall 111 and the bottom wall 112. The first sidewall 113 can be a flat surface. The first sidewall 113 is located on the side of the side wing 122 facing away from the heat exchange assembly 400. Taking the orientation in Figure 2 as an example, the first sidewall 113 is the right sidewall of the frame 110. The minimum distance between the first pipe 410 and the first sidewall 113 is less than the minimum distance between the second pipe 420 and the first sidewall 113; that is, the first pipe 410 can protrude towards the first sidewall 113 relative to the second pipe 420. In other words, the arrangement volume of the first pipe 410 can be larger than the arrangement volume of the second pipe 420.

[0074] Referring to Figure 7, the specific configuration of the housing 210 is described below. The housing 210 includes a second side wall 214 facing the heat exchange assembly 400. The second side wall 214 can be a flat surface. Along the direction away from the back wall 121, the second side wall 214 is inclined away from the first side wall 113. In other words, along the direction close to the back wall 121, the second side wall 214 is inclined towards the first side wall 113. Referring to the orientation of Figure 7, the left side wall of the housing 210 is the second side wall 214. Along the top-to-bottom direction, the second side wall 214 is inclined away from the first side wall 113. The specific inclination angle of the second side wall 214 relative to the first side wall 113 can be determined according to the actual situation.

[0075] In the prior art, the second sidewall is arranged parallel to the first sidewall, meaning that the width of the space between the box and the heat exchange component is uniform along the direction away from the back wall, i.e., the space for the first pipe and the second pipe is the same. In this solution, the second sidewall 214 is inclined relative to the first sidewall 113, which can effectively increase the installation space of the first pipe 410. This allows the first pipe 410 to protrude towards the first sidewall 113 relative to the second pipe 420. This solution allows the first pipe 410 to be set to a larger volume, thereby improving the heat exchange efficiency of the heat exchange component 400 and optimizing the internal structural layout of the indoor unit 10.

[0076] Referring to Figure 7, the relative positions of the first pipe 410 and the second pipe 420 with respect to the housing 210 are described below. In some embodiments, when viewed along a direction perpendicular to the back wall 121, the first pipe 410 at least partially overlaps with the second side wall 214 of the housing 210, meaning the first pipe 410 can protrude towards the second side wall 214. This design can fully utilize the space between the housing 210 and the heat exchange assembly 400, allowing the first pipe 410 to be configured with a larger volume, effectively improving the heat exchange efficiency of the heat exchange assembly 400. Similarly, when viewed along a direction perpendicular to the back wall 121, the second pipe 420 at least partially overlaps with the second side wall 214 of the housing 210, meaning the second pipe 420 can protrude towards the second side wall 214. This design can also fully utilize the space between the housing 210 and the heat exchange assembly 400, allowing the second pipe 420 to be configured with a larger volume, effectively improving the heat exchange efficiency of the heat exchange assembly 400.

[0077] It should be noted that the specific overlapping area between the first pipe 410 and the second side wall 214 can be determined according to the actual situation. The overlapping area between the second pipe 420 and the second side wall 214 can be the same as or different from that of the first pipe 410. In some embodiments, when viewed along a direction perpendicular to the back wall 121, the second pipe 420 can also be spaced apart from the second side wall 214, that is, the second pipe 420 is not arranged to protrude towards the second side wall 214. This design facilitates the assembly and disassembly of the electrical control box 200. When viewed along a direction perpendicular to the back wall 121, the first pipe 410 at least partially overlaps with the second side wall 214, that is, the first pipe 410 can be arranged to protrude towards the second side wall 214, which allows the first pipe 410 to be set to a larger volume, thereby improving the heat exchange efficiency of the heat exchange component 400.

[0078] Referring to Figure 6, the specific installation configuration of the housing 210 is described below. In some embodiments, the side wing 122 includes a limiting plate 1221, which is used to limit the housing 210. It should be noted that the limiting plate 1221 can be located between the heat exchange assembly 400 and the housing 210. The second side wall surface 214 of the housing 210 can conform to the side wall of the limiting plate 1221 facing away from the heat exchange assembly 400. Referring to the orientation in Figure 7, the second side wall surface 214 can conform to the right side wall of the limiting plate 1221. It should be noted that the limiting plate 1221 can be single or multiple; the specific number and structure of the limiting plates 1221 can be determined according to the actual situation. The limiting plate 1221 in this solution can improve the installation accuracy of the electrical control box 200 and the stability of the assembly connection. Furthermore, the fit between the limiting plate 1221 and the second side wall 214 of the box body 210 can make the overall structure more compact, improve the space utilization inside the indoor unit 10, and optimize the overall structure.

[0079] Referring to Figures 7 to 9, the specific structure of the housing 210 is described below. In some embodiments, the electrical control box 200 also has a third side wall 215 facing away from the heat exchange assembly 400. Referring to the orientation in Figure 7, the third side wall 215 is the right side wall of the electrical control box 200. The third side wall 215 of the electrical control box 200 is parallel to the first side wall 113 of the face frame 110, meaning that the second side wall 214 of the electrical control box 200 can be inclined relative to the third side wall 215. In this solution, the third side wall 215 of the electrical control box 200 is not inclined relative to the first side wall 113 of the face frame 110. That is, the structure at the third side wall 215 of this solution does not need to be adjusted compared to the existing electrical control box 200. This solution allows the end of the electrical control box 200 facing away from the back wall 121 to be adapted to the original assembly structure of the indoor unit 10, reducing the overall structural improvement cost.

[0080] Referring to Figures 6 to 9, the internal structure of the housing 210 in some embodiments is described below. The housing 210 has a receiving cavity 216, which can accommodate the arrangement of a circuit board 220, which can be disposed within the receiving cavity 216. Along the direction away from the back wall 121, the width of the receiving cavity 216 gradually increases in the direction perpendicular to the first side wall 113. Referring to the orientation of Figure 7, i.e., along the top-to-bottom direction, the width of the receiving cavity 216 gradually increases in the left-right direction. That is, the size of the receiving cavity 216 of the housing 210 in this embodiment can be arranged in a gradually changing manner, facilitating the adaptation and installation of the circuit board 220 and improving the flexibility of circuit board 220 installation. It should be noted that in other embodiments, along the direction away from the back wall 121, the height of the receiving cavity 216 perpendicular to the first side wall 113 can be uniformly arranged. This arrangement facilitates the rapid installation of circuit components inside the receiving cavity 216, preventing them from bumping or interfering with the housing 210.

[0081] Referring to Figure 9, the electrical control box 200 includes a terminal block 217 and connecting wires. Specifically, the terminal block 217 can be located on the side of the receiving cavity 216 facing away from the back wall 121, and the circuit board 220 is located on the side of the terminal block 217 facing the back wall 121. Referring to the orientation of Figure 9, the terminal block 217 can be located on the left side of the receiving cavity 216, and the circuit board 220 can be located on the right side of the terminal block 217. It should be noted that the connecting wires can electrically connect the circuit board 220 and the terminal block 217 respectively to realize the power supply operation of the circuit board 220. In this solution, the second side wall 214 of the box 210 is arranged at an angle, which can increase the installation space of the first pipe 410, thus allowing the first pipe 410 to be set to a larger volume, improving the heat exchange efficiency of the heat exchanger. Moreover, the structure of the electrical control box 200 facing away from the back wall 121 remains unchanged, which means it can be adapted to the original power connection structure of the terminal block 217, reducing the improvement and adjustment cost of the indoor unit 10.

[0082] Referring to Figures 6 to 9, the specific structure of the box 210 is described below. In some embodiments, the box 210 has an internal receiving cavity 216, and the circuit board 220 can be disposed within the receiving cavity 216. Specifically, the box 210 includes a box body 218 and a cover plate 219, the cover plate 219 being adaptable to the arrangement of the box body 218. The box body 218 can be connected to the housing assembly 100, and the cover plate 219 can be connected to the box body 218. The cover plate 219 and the box body 218 together form the receiving cavity 216. It is understood that the cover plate 219 can be slidably connected, rotated, snap-fitted, or screwed to the box body 218, and its specific connection configuration can be determined according to the actual situation. This solution can ensure the stability of the connection between the cover plate 219 and the box body 218, and facilitates quick assembly and disassembly of the cover plate 219 and the box body 218.

[0083] It should be noted that the cover plate 219 can be located on the side of the box body 218 away from the heat exchange component 400. Referring to the orientation of Figure 7, the cover plate 219 can be located on the right side of the box body 218. Therefore, this solution allows the cover plate 219 to be opened and closed directly without disassembling or moving the heat exchange component 400, so as to inspect and maintain the circuit components inside the box body 218, thereby improving the overall ease of operation.

[0084] Referring to Figure 7, the specific structure of the cover plate 219 is described below. The cover plate 219 includes a first plate 2191 and a second plate 2192. Specifically, referring to the orientation of Figure 7, the lower plate of the cover plate 219 can be the first plate 2191, and the upper plate can be the second plate 2192. The structure of the second plate 2192 can be the same as or different from that of the first plate 2191. Some embodiments of this application are illustrated by taking the difference between the structure of the second plate 2192 and the first plate 2191 as an example. In some embodiments, the first plate 2191 and the second plate 2192 can be arranged separately, and both the first plate 2191 and the second plate 2192 can be detachably connected to the box body 218. In other embodiments, the first plate 2191 can be integrally arranged with the second plate 2192, that is, the cover plate 219 can be detachably connected to the box body 218 through either the first plate 2191 or the second plate 2192. The specific arrangement of the cover plate 219 can be determined according to the actual situation. Some embodiments of this application are illustrated by taking the separate arrangement of the first plate 2191 and the second plate 2192 as an example. It should be noted that in some embodiments, a shielding shell 240 can be fitted on the outside of the box body 210, and the shielding shell 240 can be adapted to the arrangement of the box body 210. The shielding shell 240 can effectively shield external electromagnetic signals and prevent electromagnetic interference to the electronic components inside the electronic control box 200. Further, when the first plate 2191 and the second plate 2192 are arranged separately, the shielding shell 240 can be fitted on the first plate 2191 and the second plate 2192 respectively.

[0085] Referring to Figures 7 to 9, the specific arrangement of the first plate 2191 and the second plate 2192 is described below. In some embodiments, viewed from right to left along a direction perpendicular to the first sidewall 113, referring to the orientation in Figure 7, the first plate 2191 covers at least a portion of the terminals 217 and at least a portion of the connecting wires, and the second plate 2192 covers at least a portion of the circuit board 220. In other embodiments, the first plate 2191 covers at least a portion of the circuit board 220, and the second plate 2192 covers at least a portion of the terminals 217 and at least a portion of the connecting wires. In other embodiments, the first plate 2191 and the second plate 2192 may also cover the electronic components 227 on the circuit board 220, thereby achieving reliable protection of the circuit board 220 and the electronic components 227 by the control box 200, effectively preventing water or dust from entering the control box 200 and causing malfunctions.

[0086] The first board 2191 and the second board 2192 of this solution together cover the wiring terminal 217, connecting wires and circuit board 220. When it is necessary to inspect and maintain a specific area inside the electrical control box 200, the first board 2191 or the second board 2192 can be opened selectively. The overall operation is convenient and quick, and can ensure maintenance efficiency.

[0087] The second aspect of this application provides an air conditioner, which includes an indoor unit 10 and an outdoor unit as described in the above embodiments. The indoor unit 10 can be connected to the outdoor unit. The indoor unit 10 of this solution includes a housing assembly 100 and an electrical control box 200. The housing assembly 100 has a top wall surface 111, a bottom wall surface 112, and a back wall surface 121. Along the direction away from the back wall surface 121, the top wall surface 111 is arranged inclined towards the bottom wall surface 112. The electrical control box 200 is disposed within and connected to the housing assembly 100, and the electrical control box 200 includes a box body 210 and a circuit board 220 disposed within the box body 210. In the prior art, the top wall surface above the circuit board is arranged inclinedly, so the space above the circuit board is difficult to utilize; while the space below the circuit board needs to accommodate a drive motor, so the space below the circuit board is difficult to utilize; and when the height of the circuit board needs to meet the corresponding size requirements, the front space of the circuit board is also difficult to utilize. That is, the available space on the circuit board is small, and the arrangement density of the various electronic control components on the circuit board is large, resulting in a high cost of the circuit board. The circuit board 220 of this solution includes a first side 221 near the top wall surface 111. Along the direction away from the back wall surface 121, the first side 221 is inclined towards the bottom wall surface 112, that is, the circuit board 220 is adapted to the inclined arrangement of the top wall surface 111. Therefore, this solution can adapt to the structure and position layout of the housing assembly 100 and the drive motor 310, make full use of the upper, lower and front spaces of the circuit board 220, increase the arrangement volume of the circuit board 220, reduce the arrangement density of the electronic control components, and reduce the cost of the circuit board 220.

[0088] It should be noted that if the embodiments of this application involve directional indications (such as up, down, left, right, front, back, etc.), these directional indications are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. When a direction reference is introduced in a specific embodiment, unless the direction is specifically limited to unidirectional, it can be unidirectional or bidirectional (two parallel and opposite directions). Whether it is unidirectional or bidirectional depends on what those skilled in the art can achieve. When the direction reference is bidirectional, it should be considered that two parallel and different embodiments have been introduced simultaneously.

[0089] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0090] The above are merely preferred embodiments of this application and do not limit the scope of the patent application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of this application.

Claims

1. Indoor unit, including: A housing assembly has a top wall surface, a bottom wall surface, and a back wall surface, wherein the top wall surface is inclined toward the bottom wall surface in a direction away from the back wall surface; as well as An electrical control box is disposed within and connected to the housing assembly, the electrical control box including a box body and a circuit board disposed within the box body; The circuit board includes a first side edge near the top wall surface, and the first side edge is inclined towards the bottom wall surface in a direction away from the back wall surface.

2. The indoor unit of claim 1, wherein, The top wall has a first end line near the back wall and a second end line away from the back wall. The plane where the first end line and the second end line are located is a reference plane, and the angle between the reference plane and the back wall is α. The line connecting the end of the first side away from the back wall and the end near the back wall is a reference line, and the angle between the reference line and the back wall is β. Wherein, α ≤ β < 90°.

3. The indoor unit of claim 1 or 2, wherein, The circuit board also includes a second side near the bottom wall, the second side being arranged parallel to the first side.

4. The indoor unit of any one of claims 1 to 3, wherein, The circuit board also includes a third side near the back wall, the third side having a first end near the top wall and a second end near the bottom wall, the distance between the first end and the back wall being greater than the distance between the second end and the back wall.

5. The indoor unit of any one of claims 1 to 4, wherein, The circuit board also includes a fourth side facing away from the back wall surface. The fourth side has a third end near the top wall surface and a fourth end near the bottom wall surface. The distance between the third end and the back wall surface is greater than the distance between the fourth end and the back wall surface.

6. The indoor unit of any one of claims 1 to 5, wherein, The circuit board includes a substrate and electronic devices connected to the substrate. The side of the substrate near the top wall is the first side, and the substrate is a rectangular plate.

7. The indoor unit as described in any one of claims 1 to 6, wherein, The housing assembly includes a front frame and a chassis, the chassis being disposed within the front frame, the chassis having a back wall surface, and the front frame having a top wall surface and a bottom wall surface; and The chassis includes a side wing, which is located on one side of the chassis in a transverse direction parallel to the back wall, and the electrical control box is connected to the side wing.

8. The indoor unit of claim 7, wherein, The housing includes an electrical control shell, a middle support, and a display shell. The circuit board is disposed inside the electrical control shell. The middle support is located on the side of the electrical control shell away from the back wall, and the end of the middle support away from the bottom wall is connected to the electrical control shell. The display shell is connected to the end of the electrical control shell near the bottom wall. The indoor unit also includes a display component electrically connected to the circuit board, and the display component is disposed inside the display shell.

9. The indoor unit as described in claim 8, wherein, The indoor unit also includes an air supply assembly, which includes a drive motor, and the side wing includes a motor bracket for connecting the drive motor; and The electronic control housing is located on the side of the motor bracket away from the bottom wall, the intermediate bracket is located on the side of the motor bracket away from the back wall, and the display housing is at least partially located between the motor bracket and the bottom wall.

10. The indoor unit as described in any one of claims 6 to 9, wherein, The indoor unit also includes a heat exchange assembly, which is connected to the chassis and located on one side of the side wing. The end of the heat exchange assembly near the side wing includes a first pipe and a second pipe, with the second pipe located on the side of the first pipe away from the back wall. The outer side of the face frame also has a first side wall located between the top wall and the bottom wall. The first side wall is located on the side of the side wing away from the heat exchange assembly. The minimum distance between the first pipe and the first side wall is less than the minimum distance between the second pipe and the first side wall. The housing includes a second sidewall facing the heat exchange assembly, and the second sidewall is inclined away from the first sidewall in a direction away from the back wall.

11. The indoor unit as described in claim 10, wherein, Viewed along a direction perpendicular to the back wall, both the first conduit and the second conduit at least partially overlap with the second side wall. or, Viewed along a direction perpendicular to the back wall, the second conduit is spaced apart from the second side wall, and the first conduit at least partially overlaps with the second side wall.

12. The indoor unit of claim 10 or 11, wherein, The side wing includes a limiting plate located between the heat exchange assembly and the housing, and the second side wall surface is attached to the limiting plate away from the side wall of the heat exchange assembly.

13. The indoor unit of any one of claims 10 to 12, wherein, The electrical control box also has a third side wall facing away from the heat exchange assembly, the third side wall being parallel to the first side wall.

14. The indoor unit as described in any one of claims 10 to 13, wherein, The box body has an internal cavity, and the circuit board is disposed in the cavity. Along the direction away from the back wall, the width of the cavity gradually increases in the direction perpendicular to the first side wall. The electrical control box also includes wiring terminals and connecting wires. The wiring terminals are located on the side of the receiving cavity away from the back wall, and the circuit board is located on the side of the wiring terminals facing the back wall. The connecting wires are electrically connected to the wiring terminals and the circuit board respectively.

15. The indoor unit of any one of claims 10 to 14, wherein, The box body has an internal cavity, and the circuit board is disposed in the cavity. The box body includes a main body connected to the housing assembly and a cover plate connected to the main body. The cover plate and the main body together form the cavity, and the cover plate is located on the side of the main body away from the heat exchange assembly.

16. The indoor unit as described in claim 15, wherein, The electrical control box further includes wiring terminals and connecting wires. The wiring terminals are disposed within the receiving cavity, and the connecting wires are electrically connected to the wiring terminals and the circuit board, respectively. The cover plate comprises a first plate body and a second plate body, the first plate body and the second plate body are respectively detachably connected to the box main body, and the first plate body covers at least part of the wiring terminal and at least part of the connecting wire in the direction perpendicular to the first side wall surface, and the second plate body covers at least part of the circuit board.

17. An air conditioner comprising: the indoor unit according to any one of claims 1-16; and an outdoor unit, the indoor unit being connected to the outdoor unit.

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