Chassis components and outdoor air conditioning units

Abstract

This application discloses a chassis assembly and an outdoor air conditioning unit. The chassis assembly includes a chassis, a mounting portion, and a support portion. Both the mounting portion and the support portion are located on the side of the chassis, and the support portion is connected to the chassis. The mounting portion includes a bottom surface; the support portion includes a bottom surface, and the bottom surface of the support portion is lower than the bottom surface of the mounting portion. Because the bottom surface of the support portion is lower than the bottom surface of the mounting portion, the mounting portion avoids contact with the support portion. Therefore, the force borne by the support portion will not affect the mounting portion, and the mounting portion is less prone to damage; for example, it is less likely to deform or warp. Furthermore, the mounting portion avoiding contact with the support portion also makes it less likely to experience paint peeling.

Description

Technical Field

[0001] This application relates to air conditioning, and more particularly to chassis components and outdoor units of air conditioning systems. Background Technology

[0002] Air conditioners are typically divided into indoor and outdoor units. The outdoor unit is mainly installed on the outdoor side and achieves heat exchange on the indoor side through the action of the compressor and heat exchanger. The outdoor unit is divided into a compressor chamber and a fan chamber, and is usually enclosed by sheet metal and plastic parts.

[0003] Currently, common outdoor units in the industry include heat exchangers, fan systems, compressor systems, and casings. The casing includes a chassis assembly, motor bracket, center partition, left side panel, right side panel, front panel, air outlet grille, and top cover. The chassis assembly serves as the structural support for the bottom of the outdoor unit and the compressor carrier, working in conjunction with the surrounding front panel, left side panel, and right side panel to form a complete casing. The chassis assembly includes mounting brackets, which, along with feet, secure the outdoor unit. However, the mounting brackets are prone to damage. For example, during transportation, dragging, accidental drops, or other abnormal situations can easily damage the mounting brackets, causing deformation or warping. Utility Model Content

[0004] The purpose of this application is to disclose a chassis assembly and an air conditioner. The mounting portion of the chassis assembly is not easily damaged; for example, it is not easily deformed or warped.

[0005] In a first aspect, this application discloses a chassis assembly. The chassis assembly includes a chassis, a mounting portion, and a support portion. The mounting portion and the support portion are both distributed on the side of the chassis, and the support portion is connected to the chassis. The mounting portion includes a bottom surface; the support portion includes a bottom surface, and the bottom surface of the support portion is lower than the bottom surface of the mounting portion.

[0006] In some embodiments, the support portion and the mounting portion are integrally formed as a base, and the base is fixed to the chassis; or, the support portion, the mounting portion, and the chassis are integrally formed, and the support portion and the mounting portion constitute a base.

[0007] In some embodiments, the height difference between the bottom surface of the mounting part and the bottom surface of the support part is m, where 2mm ≤ m ≤ 8mm.

[0008] In some embodiments, the mounting portion includes a mounting hole, which is an oblong hole extending along a first direction parallel to the side of the chassis.

[0009] In some embodiments, the mounting hole includes a centerline along the first direction; the support portion is located between the centerline and the side portion of the chassis.

[0010] In some embodiments, the mounting part includes a mounting part body and a mounting part sidewall, the mounting part body being connected to the side of the chassis; the bottom surface of the mounting part sidewall is the bottom surface of the mounting part.

[0011] In some embodiments, the mounting body is uneven.

[0012] In some embodiments, the mounting body includes a mounting hole, and the mounting hole is provided with a flange around its circumference.

[0013] In some embodiments, the two ends of the sidewall of the mounting part are arc-shaped and connected to the support part.

[0014] In some embodiments, the chassis includes a support protrusion located on the side, the support protrusion including a bottom surface that is coplanar with the bottom surface of the support portion.

[0015] In some embodiments, the area of ​​the bottom surface of the support protrusion is S, where 25 square millimeters ≤ S ≤ 500 square millimeters, and / or the bottom surfaces of the support protrusion and the bottom surface of the support portion located on the same side of the mounting portion are arranged in a row.

[0016] In some embodiments, the support portion includes a connecting portion and a bottom portion, the bottom portion being parallel to a horizontal plane and including the bottom surface of the support portion; the connecting portion is in the shape of a straight plate, forming an obtuse angle with the bottom portion of the support portion, and is connected to the side portion of the chassis and the mounting portion.

[0017] Secondly, this application discloses an outdoor unit for an air conditioner. The outdoor unit for the air conditioner includes any of the aforementioned chassis components.

[0018] For the chassis assembly and the outdoor unit of the air conditioner, because the bottom surface of the support part is lower than the bottom surface of the mounting part, the mounting part avoids the support part. Therefore, the force borne by the support part will not affect the mounting part, and the mounting part is not easily damaged. For example, the mounting part is not easily deformed or warped. The fact that the mounting part avoids the support part also makes the mounting part less prone to paint peeling. Attached Figure Description

[0019] Figure 1 This is a perspective view of the chassis component of this application in one state;

[0020] Figure 2 yes Figure 1 Enlarged view of section A;

[0021] Figure 3 This is a perspective view of the chassis component of this application in another state;

[0022] Figure 4 yes Figure 3 Enlarged view of section B;

[0023] Figure 5 yes Figure 1 Side view of the chassis assembly shown;

[0024] Figure 6 yes Figure 5 Enlarged view of section C;

[0025] Figure 7 yes Figure 1 A bottom view of the chassis components shown;

[0026] Figure 8 yes Figure 7 Enlarged view of section D;

[0027] Figure 9 This is a partial schematic diagram of a chassis component in related technologies;

[0028] Figure 10 This is a bottom view of the chassis components in the relevant technology. Detailed Implementation

[0029] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0031] See Figure 1 , Figure 3 , Figure 5 and Figure 7 This application discloses a chassis assembly. The chassis assembly is a component of an air conditioner; however, it may not be a component of an air conditioner. The chassis assembly includes a chassis 1, a mounting portion 2, and a support portion 3. The mounting portion 2 and the support portion 3 are both distributed on the side of the chassis, and the support portion 3 is respectively provided on opposite sides of the mounting portion 2. In some embodiments, the support portion 3 is located at the bottom of the mounting portion 2. See also... Figure 7The mounting portion 2 and the support portion 3 are respectively provided on opposite sides (e.g., the upper and lower sides) of the chassis 1. Those skilled in the art will understand that the side portion may include at least one of the left and right sides in addition to the upper and lower sides. In the above embodiment, the meaning of the side portion is described using the chassis 1 as a square shape. Based on this, those skilled in the art can conclude that the side portion is a part of the chassis 1 where the mounting portion 2 and the support portion 3 can be installed. If the chassis assembly is a non-air conditioning component, for example, if the chassis 1 is circular, the side portion is a part on the circumference. Figure 1 and Figure 7 The illustration shows the mounting part 2 positioned opposite each other on opposite sides, for example, Figure 7 In the case of a square chassis 1, the mounting portion 2 near the lower right corner is positioned opposite to the mounting portion 2 near the upper left corner, thus aligning them in a straight line. Similarly, the mounting portions 2 near the lower left corner and the mounting portions 2 near the upper left corner are also positioned opposite each other, thus aligning them in a straight line. However, the mounting portions 2 on opposite sides may not be positioned opposite each other, thus not aligning them in a straight line. Likewise, the support portions 3 on opposite sides may or may not be aligned in a straight line. Figure 1 and Figure 7 The diagram shows that on each of the opposite sides, there are two mounting parts 2 and four support parts 3. The number of mounting parts 2 and the number of support parts 3 are equal. However, they may not be equal. For example, on one side, there are two mounting parts 2 and four support parts 3, while on the other side, there is only one mounting part 2 and two support parts 3.

[0032] See Figure 2 , Figure 4 , Figure 6 and Figure 8 The mounting portion 2 includes a bottom surface 21. The bottom surface 21 is opposite to the component supported by the chassis 1. The supported component may be, for example, a compressor. Depending on the shape of the mounting portion 2, the bottom surface 21 is not limited to the position shown in the figure. The bottom surface 21 can be understood as the surface of the mounting portion 2 furthest from the chassis 1 in a direction perpendicular to the chassis 1. The support portion 3 includes a bottom surface 31, which is used to contact the platform supporting the chassis assembly. The bottom surface 31 is lower than the bottom surface 21 of the mounting portion.

[0033] See Figure 9 In related technologies, the bottom surface 31 of the support part is flush with the bottom surface 21 of the mounting part. During transportation, abnormal situations such as dragging or accidental drops can make the support part 3 a stress-prone area. The aforementioned flushing can cause the support part 3 to be stressed, affecting the mounting part 2 and causing damage, such as deformation or warping. Of course, in some cases, the aforementioned flushing can also easily cause paint peeling on the mounting part 2. However, see... Figure 4 and Figure 6Because the bottom surface 31 of the support part is lower than the bottom surface 21 of the mounting part, the mounting part 2 avoids the support part 3. Therefore, the force borne by the support part 3 will not affect the mounting part 2, and the mounting part 2 is not easily damaged. For example, the mounting part 2 is not easily deformed or warped. The fact that the mounting part 2 avoids the support part 3 also makes the mounting part 2 less prone to paint peeling.

[0034] In some embodiments, the support portion 3 and the mounting portion 2 are integrally formed as a base. The base is fixed to the chassis 1 by welding, bolting, or other methods. Of course, the support portion 3 and the mounting portion 2 may not be integrally formed; for example, there may be a gap between them, as long as the bottom surface 31 of the support portion is lower than the bottom surface 21 of the mounting portion, and the mounting portion 2 is not easily damaged. The following describes some embodiments in which the support portion 3 and the mounting portion 2 are integrally formed:

[0035] See Figures 1 to 8 The support part 3, the mounting part 2, and the chassis 1 are integrally formed, with the support part 3 and the mounting part 2 constituting a base. Compared to welding the base and chassis 1, integral forming of the base has at least the following advantages: a) Fewer material types, facilitating standardized management. Welding results in two parts, leading to a greater variety of materials and hindering standardized management. b) Lower cost and higher production efficiency. Welding the chassis 1 and base together results in material waste, significantly increasing material costs, mold costs, and labor costs, while also reducing production efficiency. c) Integral forming ensures better reliability and higher product quality for the chassis components. Welding the chassis 1 and base can easily lead to incomplete welds or missed welds, resulting in poor welding reliability and affecting product quality.

[0036] See Figure 4 and Figure 6 The height difference between the bottom surface 21 of the mounting part and the bottom surface 31 of the support part is m, where 2mm ≤ m ≤ 8mm, for example, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.3mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.6mm, 6.8mm, 7mm, 7.3mm, 7.5mm, 7.8mm, or 8mm. Of course, the height difference m between the bottom surface 21 of the mounting part and the bottom surface 31 of the support part may not be within the above range.

[0037] See Figure 2 , Figure 4 , Figure 6 and Figure 8The mounting part 2 includes a mounting part body 22 and a mounting part sidewall 23. The mounting part body 22 is connected to the side of the chassis 1. The mounting part body 22 includes a mounting hole 221. The bottom surface of the mounting part sidewall 23 is the bottom surface 21 of the mounting part. Since the mounting part 2 includes a mounting part body 22 and a mounting part sidewall 23, and the mounting part body 22 is connected to the side, while the bottom surface of the mounting part sidewall 23 is the bottom surface 21 of the mounting part, the mounting part sidewall 23 is located on the side of the mounting part body 22, resulting in a bend between the mounting part body 22 and the mounting part sidewall 23. This makes the mounting part 2 strong and less prone to damage, such as deformation or warping. In this case, the height difference between the bottom surface 21 of the mounting part (e.g., the bottom surface of the side wall 23 of the mounting part) and the bottom surface 31 of the support part also satisfies 2mm≤m≤8mm, for example, 2mm, 2.3mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.3mm, 4.5mm, 4.8mm, 5mm, 5.3mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.8mm, 7mm, 7.3mm, 7.5mm, 7.8mm or 8mm.

[0038] Of course, for the mounting part 2, if the strength and other properties of the mounting part 2 meet the requirements, the mounting part 2 may not have the mounting part side wall 23. In this case, the bottom surface 21 of the mounting part is the bottom surface of the mounting part body 22. When the mounting part includes the mounting part side wall 23, and the height difference m between the bottom surface of the mounting part side wall 23 and the bottom surface 31 of the support part satisfies 2mm≤m≤8mm, on the one hand, it can ensure that the strength of the mounting part 2 is good, and on the other hand, it can allow the mounting part 2 to better avoid the bottom surface 31 of the support part, thereby avoiding damage caused by the support part 3.

[0039] See Figure 2 , Figure 4 and Figure 8 The mounting body 22 is uneven. For example, the mounting body 22 is provided with bulges 222 that protrude away from the bottom surface 31 of the support to achieve the unevenness. Of course, the way to achieve unevenness is not limited to this. The number of bulges 222 is not limited to two, and the position of the bulges 222 is not limited to opposite sides of the mounting body 22.

[0040] As described above, the unevenness of the mounting body 22 makes the mounting body 22 strong, and thus the mounting part 2 is not easily damaged, such as deformed or warped.

[0041] See Figure 2 and Figure 8The mounting body 22 includes a mounting hole 221, and a flange 223 is provided around the mounting hole 221. The flange 223 extends from the mounting body 22 toward the bottom surface 21 of the mounting part, or toward the bottom surface 31 of the support part. Figure 2 The extension is illustrated, with the flange 223 having a height of c relative to the mounting body 22, where 2mm ≤ c ≤ 4mm, for example, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.3mm, 3.5mm, 3.8mm, or 4mm. In other embodiments, the flange 223 may also extend from the mounting body 22 in a direction away from the bottom surface 21 of the mounting part (or away from the side wall 23 of the mounting part). When the mounting body 22 includes a bulge 222, the direction in which the bulge 222 protrudes may be opposite to the direction in which the flange 223 extends.

[0042] As described above, the flange 223 makes the mounting body 22 strong, and thus the mounting part 2 is not easily damaged, such as deformed or warped. The high strength also makes it easy for screws to pass through the mounting hole 221 to achieve installation.

[0043] See Figure 2 and Figure 8 The two ends of the mounting part sidewall 23 are arc-shaped and connected to the support part 3. Thus, the mounting part sidewall 23 is curved, which increases its strength and makes the mounting part 2 less prone to damage. In this combination with the support part 3 located between the center line and the side of the chassis 1, the arc shape at both ends is also more conducive to the mounting part 2 avoiding the support part 3, making the mounting part less prone to damage.

[0044] See Figures 1 to 4 as well as Figure 7 and Figure 8 The mounting portion 2 includes mounting holes 221. Each mounting hole 221 is an oblong hole extending along a first direction. The first direction is parallel to the side portion of the chassis 1. The side portion refers to the location where the mounting portion 2 is disposed, for example, see [reference needed]. Figure 1 and Figure 7 For the square-shaped chassis 1, the longer side is the side portion, where the mounting portion 2 is located. The first direction is parallel to the longer side, not the shorter side. See also... Figure 8The oblong hole can satisfy the following dimensions: 9mm ≤ a ≤ 13mm, for example, 9mm, 9.3mm, 9.5mm, 9.8mm, 10mm, 10.2mm, 10.5mm, 10.8mm, 11mm, 11.2mm, 11.5mm, 11.8mm, 12mm, 12.3mm, 12.5mm, 12.8mm, or 13mm; 0mm < b ≤ 15mm, for example, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm. When the chassis 1 is square and mounting portions 2 are provided on the long sides of the chassis 1, the first direction is parallel to the long side of the chassis 1, for example... Figure 7 As indicated by the middle arrow R. When the chassis 1 is square and mounting portions 2 are provided on each of its short sides (sides), the first direction is the width direction of the chassis 1. In some modified embodiments, the mounting hole is a curved hole extending along the combined direction of the first and second directions, with the second direction perpendicular to the first direction. In this case, the curved hole is, for example, an S-shaped hole or a C-shaped hole.

[0045] See Figure 10 In related technologies, the mounting portion 2 is distributed along a first direction (arrow R). The mounting hole 221 extends along a second direction (arrow r), which is perpendicular to the first direction. This mounting hole 221 makes the chassis assembly non-adjustable in the first direction, which is not conducive to the installation of equipment such as air conditioners.

[0046] As described above, when the mounting hole 221 is an oblong hole extending along the first direction, the first square is parallel to the side of the chassis 1. This makes the mounting hole 221 larger, and its width is within a range, allowing for adjustment of the mounting position, which is beneficial for the installation of equipment such as air conditioners. When the mounting hole 221 is a curved hole, the mounting position can be adjusted in both the first and second directions, which is also beneficial for the installation of equipment such as air conditioners.

[0047] See Figure 2 and Figure 8 The mounting hole 221 includes a centerline L along the first direction. The support portion 3 is located between the centerline L and the side portion of the chassis 1, that is, the support portion 3 does not extend beyond the centerline L.

[0048] As described above, the support part 3 is located between the center line L and the side of the chassis 1, so that the side wall 23 of the mounting part avoids the support part 3 by a certain distance. As a result, the force borne by the support part 3 is less likely to affect the mounting part 2, and the mounting part 2 is less likely to be damaged, for example, it is less likely to deform or warp. The fact that the mounting part 2 avoids the support part 3 also makes the mounting part 2 less likely to have paint peel off.

[0049] See Figure 1 , Figure 2 , Figure 7 and Figure 8 The chassis 1 includes a support protrusion 11 located on the side. The support protrusion 11 includes a support protrusion bottom surface 111. The support protrusion bottom surface 111 is coplanar with the bottom surface 31 of the support portion.

[0050] As described above, the bottom surface 111 of the support protrusion is coplanar with the bottom surface 31 of the support part, and the support protrusion 11 and the support part 3 play a dual supporting role, thereby providing better support for the chassis 1. For example, it can ensure that the water channel of the chassis 1 maintains the designed drainage angle and does not become smaller relative to the horizontal plane, which helps to prevent water accumulation.

[0051] In some embodiments, each of the supporting protrusion bottom surfaces 111 satisfies at least one of the following characteristics:

[0052] a) The area of ​​the bottom surface 111 of the supporting protrusion is S, where 25 square millimeters ≤ S ≤ 500 square millimeters. Since 25 square millimeters ≤ S ≤ 500 square millimeters, it is easy to form with a mold, ensuring the flatness of the bottom surface 111 of the supporting protrusion, and thus providing better support.

[0053] b) The bottom surface 111 of the supporting protrusion and the corresponding bottom surface 31 of the supporting part are arranged in a row. For example, the bottom surfaces 111 of the supporting protrusion and the bottom surfaces 31 of the supporting part located on the same side of the mounting part 2 are arranged in a row. Figure 8 In the mounting part 2, there is a support part 3 on the left and right sides respectively, and a support protrusion 11 on the left and right sides respectively. Thus, the bottom surface 31 of the support part 3 on the left side is aligned with the bottom surface 111 of the support protrusion 11 on the left side, and the bottom surface 31 of the support part 3 on the right side is aligned with the bottom surface 111 of the support protrusion 11 on the right side. Because the bottom surfaces 111 of the support protrusions and the bottom surfaces 31 of the support parts on the same side of the mounting part 2 are aligned, it facilitates mold forming, ensures the flatness of the bottom surfaces 111 of the support protrusions, and improves the support effect. Furthermore, since there are multiple support parts 3 and support protrusions 11 arranged in a row, the chassis 1 is subjected to even force, resulting in good support. Multiple support protrusions 11, or the combination of multiple support protrusions 11 with multiple support parts 3, provide good support for the chassis 1. In some cases, good support can ensure that the water channel of the chassis 1 maintains the designed drainage angle and does not become smaller relative to the horizontal plane, which helps to prevent water accumulation.

[0054] See Figure 2 , Figure 4 and Figure 6The support portion 3 includes a connecting portion 32 and a support portion bottom 33. The support portion bottom 33 is parallel to the horizontal plane and includes the bottom surface 31 of the support portion. The connecting portion 32 is in the shape of a straight plate and forms an obtuse angle with the support portion bottom 33. The connecting portion 32 is connected to the side of the chassis 1 and the mounting portion 2.

[0055] As described above, the connecting part 32 is straight and forms an obtuse angle with the bottom 33 of the support part. The connecting part 32 connects the side of the chassis 1 and the mounting part 2. The support part 3 is curved and has high strength, making it less prone to damage, which also helps to prevent damage to the mounting part 2.

[0056] Secondly, this application also discloses an outdoor unit for an air conditioner. The outdoor unit includes any of the aforementioned chassis components. The outdoor unit at least has the beneficial effects of the aforementioned chassis components, which will not be elaborated further.

[0057] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A chassis assembly, characterized in that, The chassis assembly includes a chassis, a mounting section, and a support section; wherein: Both the mounting part and the supporting part are located on the side of the chassis, and the supporting part is connected to the chassis; The mounting part includes a bottom surface of the mounting part; the supporting part includes a bottom surface of the supporting part, and the bottom surface of the supporting part is lower than the bottom surface of the mounting part.

2. The chassis assembly according to claim 1, characterized in that, The support portion and the mounting portion are integrally formed as a base, and the base is fixed to the chassis; or, the support portion, the mounting portion, and the chassis are integrally formed, and the support portion and the mounting portion constitute a base; And / or, the height difference between the bottom surface of the mounting part and the bottom surface of the support part is m, where 2mm≤m≤8mm.

3. The chassis assembly according to claim 1, characterized in that, The mounting portion includes a mounting hole, which is an oblong hole extending along a first direction parallel to the side of the chassis.

4. The chassis assembly according to claim 3, characterized in that, The mounting hole includes a centerline along the first direction; the support portion is located between the centerline and the side portion of the chassis.

5. The chassis assembly according to claim 1, characterized in that, The mounting part includes a mounting part body and a mounting part side wall. The mounting part body is connected to the side of the chassis. The bottom surface of the mounting part side wall is the bottom surface of the mounting part.

6. The chassis assembly according to claim 5, characterized in that, The mounting body includes at least one of the following features: a) The mounting part body is uneven; b) The mounting body includes a mounting hole, and a flange is provided around the circumference of the mounting hole; c) The two ends of the side wall of the mounting part are arc-shaped and connected to the support part.

7. The chassis assembly according to claim 1, characterized in that, The chassis includes a support protrusion located on the side, the support protrusion including a bottom surface, the bottom surface of the support protrusion being coplanar with the bottom surface of the support portion.

8. The chassis assembly according to claim 7, characterized in that, The area of ​​the bottom surface of the supporting protrusion is S, where 25 square millimeters ≤ S ≤ 500 square millimeters; And / or, the bottom surface of the support protrusion and the bottom surface of the support portion located on the same side of the mounting portion are arranged in a row.

9. The chassis assembly according to claim 1, characterized in that, The support portion includes a connecting portion and a bottom portion. The bottom portion of the support portion is parallel to the horizontal plane and includes the bottom surface of the support portion. The connecting portion is in the shape of a straight plate, forms an obtuse angle with the bottom portion of the support portion, and is connected to the side portion of the chassis and the mounting portion.

10. An outdoor unit for an air conditioner, characterized in that, The outdoor unit of the air conditioner includes the chassis assembly as described in any one of claims 1 to 9.

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