Fan fixing structure, fan module and ventilation wall air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, and particularly discloses a fan fixing structure, a fan module and a ventilation wall air conditioner, the fan fixing structure comprises a mounting frame, the mounting frame comprises a bottom plate and side walls arranged on the periphery of the bottom plate, the bottom plate is used for being connected with a fan, and the side walls comprise supporting walls used for being connected with a supporting body of the ventilation wall air conditioner; the reinforcing assembly comprises at least one of a first reinforcing part, a second reinforcing part and a third reinforcing part, the first reinforcing part is arranged at the position, used for being connected with the draught fan, of the bottom plate, the second reinforcing part is arranged on the supporting wall, and the third reinforcing part is arranged on the side wall and used for being connected with the supporting body. According to the draught fan fixing structure, the draught fan module and the ventilation wall air conditioner, reliable fixing and stability of the draught fan on the supporting body are guaranteed, the installation requirement of a draught fan with a larger air volume can be met, and the problem that the draught fan is damaged and falls off during transportation due to the fact that the strength of the draught fan fixing structure is insufficient can be solved. The self weight is light, and the material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, and more specifically, to a fan fixing structure, a fan module and a wall-mounted air conditioner. Background Art

[0002] With the development of data centers, the requirements for the refrigerating capacity of air conditioners are getting higher and higher. The wall-mounted air conditioner is an air conditioner unit widely used in data centers, which has the advantages of large air volume and large cooling capacity. The fan is an important component of the wall-mounted air conditioner. The efficiency of the fan plays a key role in the energy consumption of the whole wall-mounted air conditioner.

[0003] In the process of implementing the present application, the inventor found that there are at least the following problems in the prior art:

[0004] With the continuous increase of the air volume of existing fans, the weight of the fans is also increasing continuously, and the requirements for the structure and strength of the fan mounting frame are getting higher and higher, while the conventional fan mounting frame is difficult to meet the above requirements. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a fan fixing structure and a wall-mounted air conditioner, and the structural design of the fan fixing structure, the fan module and the wall-mounted air conditioner can meet the installation requirements of large-air-volume fans.

[0006] In order to achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A fan fixing structure, comprising:

[0008] A mounting frame, comprising a bottom plate and side walls provided on the bottom plate, the bottom plate being used for connecting with the fan;

[0009] A strengthening component, comprising at least one of a first strengthening member, a second strengthening member and a third strengthening member, the first strengthening member being provided on the bottom plate and located at a position where the bottom plate is used for connecting with the fan, the second strengthening member being provided on the side wall and located at a position where the side wall is used for connecting with a support main body of the wall-mounted air conditioner, and the third strengthening member being provided on the side wall, the third strengthening member being used for connecting with the support main body.

[0010] Optionally, in the above fan fixing structure, the strengthening component comprises a plurality of the second strengthening members, and the plurality of the second strengthening members are respectively and spaced apart from each other on the side wall.

[0011] Optionally, in the above fan fixing structure, opposite sides of the side wall are respectively used for connecting with the support main body, and the second strengthening members are respectively provided on the opposite sides.

[0012] Optionally, in the above-mentioned fan fixing structure, the side wall is used to connect with the end face of the support body, and the third reinforcing member is used to connect with the side face of the support body, wherein the side face of the support body is located on one side of the end face of the support body.

[0013] Optionally, in the above-mentioned fan fixing structure, the third reinforcing member includes a first connecting plate, a second connecting plate and a third connecting plate that are perpendicular to each other. The third connecting plate is connected between the first connecting plate and the second connecting plate. The first connecting plate is connected to the side wall, and the second connecting plate is used to connect with the support body.

[0014] Optionally, in the above-mentioned fan fixing structure, the side wall includes a first side plate and a second side plate. The first side plate and the second side plate are connected and form a preset included angle. The second reinforcing member includes a first reinforcing plate and a second reinforcing plate. The first reinforcing plate is attached to the first side plate, and the second reinforcing plate is attached to the second side plate.

[0015] Optionally, in the above-mentioned fan fixing structure, at least one ventilation opening is provided on the bottom plate. Optionally, in the above-mentioned fan fixing structure, the reinforcing assembly includes a plurality of the second reinforcing members, and the plurality of the second reinforcing members are respectively arranged on the support wall at intervals.

[0016] By applying the fan fixing structure provided by the present utility model, the fan can be installed on the support body of the air wall air conditioner through the mounting bracket, so as to realize the installation of the fan in the air wall air conditioner. In addition, by setting the reinforcing assembly, the structural strength of the mounting bracket is enhanced. Specifically, the bottom plate is strengthened by adding the first reinforcing member, so that the bottom plate is not easily deformed by the action of the fan; the side wall is effectively prevented from deforming by adding the second reinforcing member; the mounting member is strengthened by adding the third reinforcing member to play an auxiliary supporting role, making the connection between the mounting member and the support body more reliable.

[0017] In summary, by setting the reinforcing assembly, the reliable fixing and stability of the fan on the support body are ensured, and thus the installation requirements of a larger air volume fan can be met. It will not cause the fan operation failure or performance attenuation due to the deformation of the mounting bracket during a period of operation or during the operation process, such as the gap between the air guide ring and the fan impeller becoming smaller or even running interference. At the same time, the problem of the fan being damaged and falling off during transportation due to insufficient strength of the fan fixing structure can also be avoided. In addition, the reinforcing assembly cooperates with the mounting bracket, and on the premise of meeting the requirements of strength and stability, it has a relatively light self-weight, so that the overall weight of the fan module can be reduced, and the material cost is lowered.

[0018] To achieve the above object, the present utility model further provides a fan module, which includes any one of the above fan fixing structures. Since the above fan fixing structure has the above technical effects, the fan module having this fan fixing structure should also have corresponding technical effects.

[0019] To achieve the above object, the present utility model further provides a wall-mounted air conditioner, which includes any one of the above fan fixing structures or fan modules. Since the above fan fixing structure or fan module has the above technical effects, the wall-mounted air conditioner having this fan fixing structure and fan module should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of the fan fixing structure according to a specific embodiment of the present utility model;

[0022] Figure 2 For Figure 1 explosion schematic diagram;

[0023] Figure 3 Structural schematic diagram of the fan module according to a specific embodiment of the present utility model;

[0024] Figure 4 For Figure 3 explosion schematic diagram;

[0025] Figure 5 Structural schematic diagram of the wall-mounted air conditioner according to a specific embodiment of the present utility model.

[0026] Reference numerals:

[0027] 100 - Fan fixing structure; 200 - Fan; 300 - Flow guide ring; 400 - Mounting plate; 500 - Support body;

[0028] 1 - Mounting frame; 2 - Reinforcing component;

[0029] 11 - Bottom plate; 12 - Side wall; 121 - First side plate; 122 - Second side plate;

[0030] 21 - First reinforcing member; 22 - Second reinforcing member; 23 - Third reinforcing member; 221 - First reinforcing plate; 222 - Second reinforcing plate; 231 - First connecting plate; 232 - Second connecting plate; 233 - Third connecting plate;

[0031] Among them, Figure 1 Only a part of the middle fan is shown. Specific embodiments

[0032] An embodiment of the present utility model discloses a fan fixing structure, a fan module and a wind wall air conditioner. Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] In a common wind wall air conditioner, the fan is connected to the unit through a fan fixing bracket and a panel. Among them, the fan, the fan mounting bracket, the panel and the air guide ring are assembled into a whole by bolts, which simplifies the installation and transportation of the fan. However, the inventors of the present application found in the process of implementing the present application that since the fan mounting bracket is directly fixed on the panel, the overall weight and running vibration of the fan are transmitted to the panel. When installing a fan with a large air volume, high speed and heavy self-weight. The stress condition of the panel is poor and the panel is prone to deformation. When the panel is deformed, since the air guide ring is installed on the panel, problems such as misalignment between the fan impeller and the air guide ring and the gap not meeting the design requirements will occur, directly affecting the performance of the fan and unable to meet the usage requirements of the wind wall for the fan. Therefore, the fan fixing structure provided in the present application improves the strength and stability of the mounting bracket by adding a reinforcing component and arranging it at a part of the mounting bracket, and at the same time will not cause a significant increase in the overall weight of the mounting bracket. Of course, the fan fixing structure provided by the present utility model is applicable but not limited to wind wall air conditioners. The following embodiments mainly illustrate the structure and specific setting method of the reinforcing component.

[0034] In some embodiments, please refer to Figure 1 - Figure 2 and Figure 5, the fan fixing structure provided by the present utility model includes a mounting bracket 1 and a strengthening component 2. Among them, the mounting bracket 1 includes a bottom plate 11 and side walls 12, and the side walls 12 are provided on the bottom plate 11. Exemplarily, the side walls 12 are arranged around the periphery of the bottom plate 11. It can be understood that the side walls 12 and the bottom plate 11 can be either an integral structure, such as being made by cutting, bending, etc. of a plate member, or a split structure, and are connected by conventional fixing methods such as welding and bonding. The bottom plate 11 is used to connect with the fan 200, and the connection method between it and the fan 200 can be set according to the structure of the corresponding fixing components on the fan 200, and no specific limitation is made here. The side walls 12 are used to connect with the support body 500 of the air wall air conditioner. The support body 500 of the air wall air conditioner can specifically be the frame of the unit, and the side walls 12 are connected to the frame, thereby installing the fan fixing structure on the frame. The strengthening component 2 includes at least one of a first strengthening member 21, a second strengthening member 22, and a third strengthening member 23. The first strengthening member 21 is provided on the bottom plate 11 and is located at the position where the bottom plate 11 is used to connect with the fan 200, that is, the first strengthening member 21 is provided locally on the bottom plate 11, and the fan 200 can be installed at the position where the first strengthening member 21 is provided on the bottom plate 11, so that the bottom plate 11 is not easily deformed by the action of the fan 200. The second strengthening member 22 is provided on the side walls 12 and is located at the position where the side walls 12 are used to connect with the support body 500. Since the position where the side walls 12 are connected to the support body 500 is more likely to deform as a stress position, by adding the second strengthening member 22 for strengthening, the deformation of the side walls 12 can be effectively prevented. The third strengthening member 23 is provided on the side walls 12 and is used to connect with the support body 500. It can be understood that the side walls 12 here are not limited to the position where they are connected to the support body 500, and can also be provided on other parts of the side walls 12. On the basis of the connection between the side walls 12 and the support body 500, combined with the third strengthening member 23 being connected to the side walls 12 and the support body 500 respectively, through the auxiliary support effect of the third strengthening member 23, the connection between the mounting member and the support body 500 is made more reliable.

[0035] Applying the fan fixing structure provided by the present utility model, the fan 200 can be installed on the support main body 500 of the air wall air conditioner through the mounting bracket 1 to achieve the installation of the fan 200 in the air wall air conditioner. In addition, by setting the strengthening component 2, the structural strength of the mounting bracket 1 is enhanced, ensuring the reliable fixation and stability of the fan 200 on the support main body 500, and thus being able to meet the installation requirements of a fan 200 with a larger air volume. It will not cause the fan 200 to fail to meet the installation requirements of the fan 200 after running for a period of time or during operation due to the deformation of the mounting bracket 1, resulting in the operation failure or performance attenuation of the fan 200, such as the clearance between the air guide ring and the impeller of the fan 200 becoming smaller or even running interference. At the same time, it is also possible to avoid the problem of the fan 200 falling off due to transportation damage caused by insufficient strength of the fan fixing structure. In addition, the strengthening component 2 cooperates with the mounting bracket 1, and on the premise of meeting the requirements of strength and stability, it has a relatively light self-weight, so it can reduce the overall weight of the fan module and lower the material cost.

[0036] In some embodiments, the strengthening component 2 includes a first strengthening member 21, a second strengthening member 22, and a third strengthening member 23, that is, the fan fixing structure is provided with the first strengthening member 21, the second strengthening member 22, and the third strengthening member 23. By arranging the second strengthening members 22 on both sides of the mounting bracket 1, the strength on both sides of the mounting bracket 1 is enhanced. At the installation location of the fan 200, the first strengthening member 21 is added to enhance the strength and stability of the fan fixing structure. Through the arrangement of the first strengthening member 21 and the second strengthening member 22, the overall structural strength of the fan fixing structure is ensured, meeting the installation requirements of the large-air-volume fan 200 of the air wall. In addition, since the fan 200 is hung on the unit, in order to ensure the stability and fixing strength of the fan fixing structure on the unit, a third strengthening member 23 is added to the mounting bracket 1 and connected to the unit.

[0037] In some embodiments, the first strengthening member 21 is a strengthened sheet metal, which is laid on the bottom plate 11 and fixedly connected thereto, specifically, it can be welded to the bottom plate 11. Mounting holes cooperating with the fan 200 can be respectively arranged on the first strengthening member 21 and the bottom plate 11. In addition, bolt holes can be respectively arranged on the first strengthening member 21 and the bottom plate 11 to be bolt-connected to the fan 200. Specifically, a plurality of bolt holes are evenly distributed around the mounting hole to ensure the reliable connection to the fan 200.

[0038] In some embodiments, the strengthening component 2 includes a plurality of second strengthening members 22, and the plurality of second strengthening members 22 are respectively arranged on the side wall 12 at intervals. On the one hand, the plurality of strengthening members can respectively provide an effective strengthening effect on different positions of the side wall 12, thereby improving the overall structural strength of the side wall 12. On the other hand, compared with making the side wall 12 integrally thickened, the overall weight is reduced and the material cost is lowered. Further, the respective second strengthening members 22 are evenly distributed, that is, the distance between adjacent two second strengthening members 22 is equal, so as to provide a more uniform strengthening effect.

[0039] In some embodiments, two opposite sides of the side wall 12 are respectively connected to the support body 500. The mounting frame 1 can be stressed from opposite sides, and the stress is more stable and not easily deformed. Second reinforcing members 22 are respectively arranged on the two sides where the side wall 12 is connected to the support body 500. On the one hand, the structural strength is improved through the second reinforcing members 22. On the other hand, the bottom plate 11 is connected between the two sides, which can also play a role in enhancing the structural strength. Exemplarily, when the bottom plate 11 is a polygonal plate, such as a quadrilateral, the side wall 12 correspondingly includes a front side wall, a rear side wall, a left side wall, and a right side wall. Then, one of them can be connected to the support body 500, or the opposite left side wall and right side wall can be connected to the support body 500, or the opposite front side wall and rear side wall can be connected to the support body 500.

[0040] In some embodiments, the side wall 12 is used to be connected to the end face of the support body 500, and the third reinforcing member 23 is used to be connected to the side face of the support body 500, wherein the side face of the support body 500 is located on one side of the end face of the support body 500. That is, the side wall 12 and the second reinforcing member 22 are used to be connected to different faces of the support body 500, so as to realize the connection between the support body 500 and the fan 200 from different directions, making the connection more stable and reliable. It can be understood that the end face of the support body 500 can specifically be the upper end face, the directions of the side face and the end face are different, and they can specifically be perpendicular to each other.

[0041] In some embodiments, the third reinforcing member 23 includes a first connecting plate 231, a second connecting plate 232, and a third connecting plate 233 that are perpendicular to each other. The third connecting plate 233 is connected between the first connecting plate 231 and the second connecting plate 232. The first connecting plate 231 is connected to the side wall 12, and the second connecting plate 232 is used to be connected to the support body 500. The third connecting plate 233 is connected between the first connecting plate 231 and the second connecting plate 232, and it can specifically be a right-angled triangular plate. The third reinforcing member 23 is specifically in the shape of a right triangle. One right-angled side of the right triangle corresponds to the connection between the first connecting plate 231 and the side wall 12 of the mounting frame 1, and the other right-angled side corresponds to the connection between the second connecting plate 232 and the support body 500. Since a triangle has stability, the third reinforcing member 23 can provide a more stable and reliable supporting effect.

[0042] In some embodiments, the side wall 12 includes a first side plate 121 and a second side plate 122. The first side plate 121 and the second side plate 122 are connected and form a preset included angle. The second reinforcing member 22 includes a first reinforcing plate 221 and a second reinforcing plate 222. The first reinforcing plate 221 and the second reinforcing plate 222 are connected. The first reinforcing plate 221 is attached to the first side plate 121, and the second reinforcing plate 222 is attached to the second side plate 122. Specifically, the second side plate 122 is perpendicular to the first side plate 121, that is, the preset included angle is 90 degrees. When the side wall 12 is connected to the support body 500 of the air wall air conditioner, the first side plate 121 can be positioned in cooperation with the side surface of the support body 500, and the second side plate 122 can abut against the support body 500, such as being placed on the support body 500, so as to be supported by the support body 500, and the second side plate 122 and the support body 500 can be locked by bolts, thereby realizing the reliable connection between the side wall 12 and the support body 500. The first reinforcing plate 221 is attached to the first side plate 121, and the second reinforcing plate 222 is attached to the second side plate 122, which improves the structural strength of the first side plate 121 and the second side plate 122, and further improves the overall structural strength of the side wall 12. Specifically, the second reinforcing member 22 can be made of reinforced sheet metal and can be formed into the above structure by bending or other means.

[0043] In some embodiments, at least one ventilation opening is provided on the bottom plate 11. By providing the ventilation opening, the weight of the mounting rack 1 can be reduced. In addition, in some embodiments, the blower 200 is a centrifugal blower 200. The centrifugal blower 200 has advantages such as energy saving, easy use, easy repair, and low risk. For the centrifugal blower 200, by providing the ventilation opening on the bottom plate 11, the air outlet resistance of the blower 200 can be reduced, and the performance of the blower 200 can be improved. Specifically, the ventilation openings are respectively provided at opposite ends of the bottom plate 11 relative to the second reinforcing plate, and the shape of the ventilation opening can be set as needed, such as a square hole, a circular hole, etc.

[0044] Based on the blower fixing structure provided in the above embodiments, the present utility model further provides a blower module, and the blower module includes any one of the blower fixing structures in the above embodiments. Since the blower module adopts the blower fixing structure in the above embodiments, the beneficial effects of the blower module can be referred to the above embodiments.

[0045] In some embodiments, please refer to Figure 3 - Figure 4, the fan module includes a fan 200 and a flow guide ring 300 that cooperates with the fan 200. The fan 200 is connected to the bottom plate 11 of the fan fixing structure 100. The flow guide ring 300 is configured to be disposed on the support body 500, and the flow guide ring 300 is located on the air inlet side of the fan 200. That is, the flow guide ring 300 fixes the air guide ring assembly and the fan fixing structure 100 to the unit respectively. Different from the conventional structure where the air guide ring is connected to the fan fixing structure, during maintenance, the fan fixing structure 100 can be directly disassembled from the support body 500 without disassembling the air guide ring, which is convenient for disassembly. This makes the inspection, disassembly, and assembly of the fan 200 convenient, and full-front maintenance can be achieved, greatly facilitating the subsequent use and maintenance of the fan 200.

[0046] In some embodiments, an installation plate 400 is further included. The flow guide ring 300 is disposed on the installation plate 400, and the installation plate 400 and the installation frame 1 are respectively configured to be connected to the support body 500. By providing the installation plate 400, it is convenient to connect the flow guide ring 300 to the support body 500. It should be noted that here the installation plate 400 and the installation frame 1 are respectively configured to be connected to the support body 500, which means that there is no direct connection relationship between the installation plate 400 and the installation frame 1, and the two are respectively and independently connected to the support body 500 to facilitate the disassembly, assembly, and front maintenance of the fan 200.

[0047] When using the fan fixing structure and the fan module provided by the present application, in one embodiment, during assembly, the second reinforcing member 22 can be first welded to the side wall 12, and the fan 200 and the first reinforcing member 21 can be connected to the installation frame 1 by bolts to form a fan 200 assembly. The air guide ring and the installation plate 400 can be bolted together to form an air guide ring assembly. The installation frame 1 and the installation plate 400 are respectively connected to the support body 500 of the air wall air conditioner, thereby realizing the installation of the fan 200 and the air guide ring.

[0048] Based on the fan fixing structure and the fan module provided in the above embodiments, the present utility model further provides an air wall air conditioner, which includes any one of the fan fixing structures or fan modules in the above embodiments. Since this air wall air conditioner adopts the fan fixing structure or the fan module in the above embodiments, the beneficial effects of this air wall air conditioner can be referred to the above embodiments.

[0049] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fan fixing structure, characterized in that, Comprising: An installation frame (1), including a bottom plate (11) and side walls (12) provided on the bottom plate (11), and the bottom plate (11) is used for connecting with a fan (200); A strengthening assembly (2), including at least one of a first strengthening member (21), a second strengthening member (22), and a third strengthening member (23). The first strengthening member (21) is provided on the bottom plate (11) and is located at a position where the bottom plate (11) is used for connecting with the fan (200). The second strengthening member (22) is provided on the side wall (12) and is located at a position where the side wall (12) is used for connecting with a support body (500) of a wind wall air conditioner. The third strengthening member (23) is provided on the side wall (12), and the third strengthening member (23) is used for connecting with the support body (500).

2. The fan fixing structure according to claim 1, characterized in that, The strengthening assembly (2) includes a plurality of the second strengthening members (22), and the plurality of the second strengthening members (22) are respectively and spaced apart from each other on the side wall (12).

3. The fan fixing structure according to claim 1, characterized in that, Opposite sides of the side wall (12) are respectively used for connecting with the support body (500), and the second strengthening members (22) are respectively provided thereon.

4. The blower fixing structure according to any one of claims 1-3, characterized in that, The side wall (12) is used for connecting with an end face of the support body (500), and the third strengthening member (23) is used for connecting with a side face of the support body (500), wherein the side face of the support body (500) is located on one side of the end face of the support body (500).

5. The fan fixing structure according to claim 4, wherein, The third strengthening member (23) includes a first connecting plate (231), a second connecting plate (232), and a third connecting plate (233) that are perpendicular to each other. The third connecting plate (233) is connected between the first connecting plate (231) and the second connecting plate (232). The first connecting plate (231) is connected with the side wall (12), and the second connecting plate (232) is used for connecting with the support body (500).

6. The blower fixing structure according to any one of claims 1-3, characterized in that The side wall (12) includes a first side plate (121) and a second side plate (122). The first side plate (121) and the second side plate (122) are connected and form a preset included angle. The second strengthening member (22) includes a first strengthening plate (221) and a second strengthening plate (222). The first strengthening plate (221) and the second strengthening plate (222) are connected. The first strengthening plate (221) is attached to the first side plate (121), and the second strengthening plate (222) is attached to the second side plate (122).

7. The blower fixing structure according to claim 1, characterized in that At least one ventilation opening is provided on the bottom plate (11).

8. A fan module includes a fan (200) and a flow guide ring (300) cooperating with the fan (200), characterized in that, It further includes a fan fixing structure as described in any one of claims 1 - 7. The fan (200) is connected to the bottom plate (11) of the fan fixing structure. The guide ring (300) is used to be provided on the support body (500), and the guide ring is located on the air inlet side of the fan (200).

9. The fan module according to claim 8, wherein It further includes a mounting plate (400). The guide ring (300) is provided on the mounting plate (400), and the mounting plate (400) and the installation frame (1) are respectively used for connecting with the support body (500).

10. An air wall air conditioner, characterized in that, Including the fan fixing structure according to any one of claims 1-7 or the fan module according to any one of claims 8-9.

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