Heat exchange assembly and air conditioner

Abstract

The invention provides a heat exchange assembly and an air conditioner. The heat exchange assembly comprises an evaporator, a condenser and a water fetching part, an avoiding structure penetrating in the thickness direction is formed in the bottom of the condenser, the water fetching part comprises a water fetching dial wheel and a water fetching motor, the water fetching dial wheel is located in a water fetching space in the middle of the condenser, and an output shaft of the water fetching motor penetrates through the avoiding structure and is in driving connection with the water fetching dial wheel. The driving device is used for driving the water-fetching dial wheel to rotate. The problem that in the prior art, a movable air conditioner is low in water fetching efficiency is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a heat exchange component and an air conditioner. Background Art

[0002] Mobile air conditioners combine the internal and external units of traditional split units into one unit. They are small, portable and mobile, and are widely used in people's daily lives. Because they need to be used on the move, the condensed water produced by refrigeration is not convenient to be discharged in a fixed manner. Therefore, a water pumping device is set up to pump the condensed water onto the condenser to evaporate it, thus achieving the function of no drainage.

[0003] However, the existing water pumping motor and water pumping wheel of the mobile air conditioner have a certain diameter. In particular, if the diameter of the water pumping wheel is too small, the water pumping efficiency will be affected. The condenser component is generally arranged above the rotating shaft of the water pumping motor. Affected by the diameter of the water pumping wheel, the condenser component is at a greater height from the water receiving tray, which increases the height dimension of the air conditioner and affects the height dimension of the air conditioner shell. In addition, the condenser component and the water pumping wheel form a large misalignment in the height direction. The water pumped by the water pumping wheel is mostly pumped onto the water receiving tray below the condenser component, which affects the water pumping efficiency.

[0004] As can be seen from the above, the prior art has the problem of low water pumping efficiency of mobile air conditioners. Summary of the invention

[0005] The main purpose of the present invention is to provide a heat exchange component and an air conditioner to solve the problem of low water pumping efficiency of the mobile air conditioner in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a heat exchange component is provided, including an evaporator, a condenser and a water pumping part. The bottom of the condenser is provided with an avoidance structure which penetrates along the thickness direction. The water pumping part includes a water pumping paddle wheel and a water pumping motor. The water pumping paddle wheel is located in the water pumping space in the middle of the condenser. The output shaft of the water pumping motor is passed through the avoidance structure and is connected to the water pumping paddle wheel for driving the water pumping paddle wheel to rotate.

[0007] Furthermore, the avoidance structure is a avoidance gap or a avoidance hole.

[0008] Further, a distance H between the avoidance structure and the bottom end of the condenser is 14 mm to 20 mm.

[0009] Furthermore, the condenser includes a main body and a connecting plate. The main body is divided into two parts. The first ends of the two main bodies are connected. There is an angle between the two main bodies and the second ends are connected by the connecting plate to form a closed water-pumping space. The avoidance structure is located on one of the main bodies.

[0010] According to another aspect of the present invention, there is provided an air conditioner comprising the above-mentioned heat exchange assembly.

[0011] Furthermore, the air conditioner also includes a bottom shell and a water receiving tray, the water receiving tray is arranged on the bottom shell, and the heat exchange component is located above the water receiving tray, so that the condensed water generated by the evaporator is collected by the water receiving tray and flows to the water pumping part.

[0012] Furthermore, the water receiving tray has a groove, one end of which is located below the water pumping wheel, and the other end of which extends to the drain outlet of the water receiving tray.

[0013] Furthermore, at least a portion of the water pumping wheel is located in the groove.

[0014] Furthermore, a heat-insulating gap is provided between the water receiving tray and the bottom shell.

[0015] Furthermore, support ribs are provided at the insulation gap, and upper and lower ends of the support ribs are respectively connected to the water receiving tray and the bottom shell, and there are multiple support ribs, which are arranged at intervals.

[0016] According to the technical solution of the present invention, the heat exchange assembly includes an evaporator, a condenser and a water pumping part. The bottom of the condenser is provided with an avoidance structure that penetrates along the thickness direction. The water pumping part includes a water pumping dial and a water pumping motor. The water pumping dial is located in the water pumping space in the middle of the condenser. The output shaft of the water pumping motor is penetrated through the avoidance structure and is connected to the water pumping dial for driving the water pumping dial to rotate. By providing an avoidance structure at the bottom of the condenser for the output shaft of the water pumping motor to pass through, the height layout of the condenser can be reduced, so that the vertical misalignment between the condenser and the water pumping dial is reduced, and the water pumped up by the water pumping dial can be more likely to hit the fins of the condenser, greatly improving the water pumping evaporation efficiency, and solving the problem of low water pumping efficiency of mobile air conditioners in the prior art. In addition, the above-mentioned setting method can also reduce the layout space of the condenser, thereby reducing the shell height of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram showing an angle of an air conditioner in a specific embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram showing another angle of an air conditioner in a specific embodiment of the present invention;

[0020] Figure 3 Shows Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 A schematic diagram showing the structure of a hidden condenser and evaporator of an air conditioner in a specific embodiment of the present invention is shown;

[0022] Figure 5 A cross-sectional view of an air conditioner in a specific embodiment of the present invention is shown;

[0023] Figure 6 A schematic structural diagram of a condenser in a specific embodiment of the present invention is shown at an angle;

[0024] Figure 7 A schematic structural diagram of a condenser in a specific embodiment of the present invention is shown from another angle.

[0025] The above drawings include the following reference numerals:

[0026] 10. Evaporator; 20. Condenser; 21. Main body; 211. Avoidance structure; 22. Connecting plate; 30. Water pumping part; 31. Water pumping dial; 32. Water pumping motor; 40. Water pumping space; 50. Bottom shell; 60. Water receiving tray; 61. Groove; 62. Drain outlet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to solve the problem of low water pumping efficiency of mobile air conditioners in the prior art, the present invention provides a heat exchange component and an air conditioner. The air conditioner includes the heat exchange component.

[0029] like Figures 1 to 5 As shown, the heat exchange assembly includes an evaporator 10, a condenser 20 and a water pumping member 30. The bottom of the condenser 20 is provided with an avoidance structure 211 that penetrates in the thickness direction. The water pumping member 30 includes a water pumping dial 31 and a water pumping motor 32. The water pumping dial 31 is located in the water pumping space 40 in the middle of the condenser 20. The output shaft of the water pumping motor 32 is penetrated through the avoidance structure 211 and is drivingly connected to the water pumping dial 31, so as to drive the water pumping dial 31 to rotate.

[0030] The heat exchange assembly includes an evaporator 10, a condenser 20 and a water pumping member 30. The bottom of the condenser 20 is provided with a relief structure 211 that penetrates along the thickness direction. The water pumping member 30 includes a water pumping wheel 31 and a water pumping motor 32. The water pumping wheel 31 is located in the water pumping space 40 in the middle of the condenser 20. The output shaft of the water pumping motor 32 is penetrated through the relief structure 211 and is connected to the water pumping wheel 31 for driving the water pumping wheel 31 to rotate. In this way, by providing the relief structure 211 at the bottom of the condenser 20 for the output shaft of the water pumping motor 32 to pass through, the height layout of the condenser 20 can be reduced, so that the vertical misalignment between the condenser 20 and the water pumping wheel 31 is reduced, and the water pumped up by the water pumping wheel 31 can be more likely to hit the fins of the condenser 20, greatly improving the water pumping evaporation efficiency. In addition, through the above-mentioned setting method, the layout space of the condenser 20 can also be reduced, thereby reducing the shell height of the air conditioner.

[0031] In this embodiment, the avoidance structure 211 is a avoidance gap. It is understandable that the avoidance gap is connected to the bottom end surface of the condenser 20, so that the output shaft of the water pumping motor 32 can be first connected to the water pumping wheel 31 and then directly installed into the avoidance gap from the bottom of the condenser 20, thereby improving assembly efficiency.

[0032] Specifically, the avoidance gap can be a U-shaped gap. Of course, the avoidance gap can also be other shapes such as a rectangular gap, which can be selected according to actual needs.

[0033] In an optional embodiment, the avoidance structure 211 is a avoidance hole. It is understandable that there is a preset distance between the avoidance hole and the bottom end surface of the condenser 20, and the preset distance is adapted to the position height of the output shaft of the water pumping motor 32.

[0034] In this embodiment, the distance H between the avoidance structure 211 and the bottom end of the condenser 20 is 14 mm to 20 mm. Specifically, the distance between the avoidance structure 211 and the bottom end of the condenser 20 is the distance between the top of the avoidance structure 211 and the bottom end of the condenser 20. For example, when the avoidance structure 211 is a avoidance gap, the distance H between the avoidance structure 211 and the bottom end of the condenser 20 is the distance between the top of the inner wall of the avoidance gap and the bottom end of the condenser 20. Figure 5 shown.

[0035] The distance between the center of the output shaft of the water pumping motor 32 and the bottom end of the condenser 20 is defined as L, then L = HR-2mm. Wherein, R is the output shaft diameter of the water pumping motor 32, and 2mm is the movement clearance between the output shaft of the water pumping motor 32 and the top end of the avoidance structure 211. In this embodiment, the output shaft diameter R of the water pumping motor 32 is 4mm, then L = H-4mm.

[0036] In this embodiment, the pumping effect is related to the distance L. The larger L is, the smaller the misalignment between the pumping wheel 31 and the condenser 20 is, and the better the pumping effect is. L is related to H. The output shaft of the pumping motor 32 should be arranged as close to the top of the avoidance structure 211 as possible. However, the output shaft diameter of the pumping motor 32 varies, and a movement gap needs to be left between the output shaft of the pumping motor 32 and the top of the avoidance structure 211. Therefore, the above formula is preferably used: L = H-4 mm.

[0037] In this embodiment, the last U-shaped condenser tube of the condenser 20 is inserted obliquely, and the maximum distance between the U-shaped condenser tube and the bottom end of the condenser 20 after the oblique insertion is 23.71 mm.

[0038] Through experiments, the data on the influence of the distance L between the output shaft center of the water pumping motor 32 and the bottom end of the condenser 20 on the overall performance and water pumping capacity are as follows:

[0039] (I) The influence of distance L on the performance of the whole machine:

[0040] By setting different distances L between the output shaft center of the water pumping motor 32 and the bottom end of the condenser 20, various performances of the air conditioner are shown in Table 1.

[0041] Test method: Under the working conditions of 35 / 28.3℃, in the air conditioning cooling mode, set the P1 mode (75Hz-indoor unit 1600r / outdoor unit 1700r), connect the air outlet of the air conditioner to the laboratory wind box, and then measure the various performances of the air conditioner.

[0042] Table 1 Test results of the effect of pumping motor distance L on the performance of the whole machine

[0043]

[0044] It can be seen from Table 1 that as the distance L increases, the overall performance of the air conditioner gradually increases.

[0045] (II) The influence of distance L on water-flying ability:

[0046] The amount of water remaining in the air conditioner is an important parameter for measuring the water pumping capacity. If there is too much water in the whole machine, it will not only overflow, affecting the user's use, but also trigger the water full protection device, causing shutdown, which greatly reduces the performance of the whole machine. By setting the distance L between the output shaft center of the water pumping motor and the bottom of the condenser, the water pumping capacity of the air conditioner is shown in Table 2.

[0047] Test method: Under the working condition of 30 / 29℃, in the air conditioning cooling mode, set the P1 mode (75Hz-indoor unit 1600r / outdoor unit 1700r). During the test, the whole machine needs to run for 1 hour to keep the whole machine state stable, and then run continuously for 4 hours. After shutting down, weigh the remaining water.

[0048] Table 2 Test results of the effect of pumping motor distance L on pumping capacity

[0049]

[0050] It can be seen from Table 2 that as the distance L increases, the amount of remaining water in the air conditioner is also decreasing.

[0051] like Figures 2 to 3 , Figures 5 to 7 As shown, the condenser 20 includes a main body 21 and a connecting plate 22. The main body 21 is divided into two parts. The first ends of the two main bodies 21 are connected. There is an angle between the two main bodies 21 and the second ends are connected through the connecting plate 22 to enclose a closed water pumping space 40. The avoidance structure 211 is located on one of the main bodies 21. In other words, the condenser 20 in this embodiment is similar to an isosceles triangle structure, and a triangular water pumping space 40 is enclosed in the middle, that is, the two main bodies 21 are the waist, and the connecting plate 22 is the bottom. Furthermore, in order to reasonably arrange the condenser 20, the angle between the two main bodies 21 is an acute angle to prevent the condenser 20 from occupying too much space.

[0052] It can be understood that the closure of the water pumping space 40 is in terms of the circumference of the condenser 20 .

[0053] In this embodiment, if Figures 2 to 3 ,as well as Figure 7 As shown, since a avoidance structure 211 is provided at the bottom of a main body 21, the avoidance structure 211 will damage the U-shaped condenser tube at the bottom of the main body 21, so the U-shaped condenser tube at this location needs to be cancelled. Furthermore, the main body 21 in this embodiment is arranged as a double row of condenser tubes, and the two tubes of the U-shaped condenser tube in a normal state are arranged up and down when viewed from the side. After the original U-shaped condenser tube at the bottom of the main body 21 is cancelled, the two tubes of the U-shaped condenser tube at the bottom of the existing main body 21 are arranged obliquely to reduce the upper and lower occupied space of the U-shaped condenser tube, thereby reducing the overall height of the main body 21.

[0054] like Figures 1 to 4 As shown, the present application also provides an air conditioner, including the above heat exchange assembly. Specifically, the side of the main body 21 of the condenser 20 is connected to the evaporator 10, the compressor, the capillary tube, etc. through a pipeline to form an air conditioning heat exchange system.

[0055] like Figures 1 to 5As shown, the air conditioner further includes a bottom shell 50 and a water receiving pan 60, the water receiving pan 60 is arranged on the bottom shell 50, and the heat exchange assembly is located above the water receiving pan 60, so that the condensed water generated by the evaporator 10 is collected by the water receiving pan 60 and flows to the water pumping member 30. Specifically, a raised platform structure is provided on the water receiving pan 60 to support the condenser 20 and the evaporator 10. During cooling, the condensed water generated by the evaporator 10 is collected by the water receiving pan 60 and flows to the bottom of the condenser 20.

[0056] In this embodiment, the air conditioner is a mobile air conditioner.

[0057] For the water pumping member 30, the water pumping wheel 31 needs to have a sufficient safe movement distance from the bottom of the water receiving tray 60, which, on the one hand, raises the arrangement height of the water pumping wheel 31 and increases the overall height of the air conditioner housing. On the other hand, the surface area of ​​the bottom of the water receiving tray 60 is large, and the water pumping wheel 31 will not be able to pump out a lot of water due to the movement gap.

[0058] like Figure 1 , Figures 4 to 5 As shown, the water receiving tray 60 has a groove 61, one end of the groove 61 is located below the water pumping wheel 31, and the other end extends to the drain port 62 of the water receiving tray 60. It can be understood that the groove 61 is a water collecting tank, and the condensed water formed by the evaporator 10 will flow into the groove 61. Under normal circumstances, the drain port 62 of the water receiving tray 60 is in a blocked state, and the water pumping function of the water pumping member 30 is used to achieve the drainage-free function.

[0059] Specifically, the groove 61 in this embodiment is a relatively small area from the bottom of the water pumping wheel 31 to the drain port 62 of the water receiving tray 60, that is, the groove 61 has a relatively narrow width to avoid occupying too much space of the water receiving tray 60. Through the above arrangement, the minimum movement gap between the water pumping wheel 31 and the water receiving tray 60 is at the groove 61, which avoids large-area contact between the water receiving tray 60 and the bottom shell 50 or condensation caused by cold radiation in a small gap, thereby reducing the space of the air conditioner housing.

[0060] In this embodiment, at least a portion of the water pumping wheel 31 is located in the groove 61, so that the condensed water in the groove 61 is pumped onto the fins of the condenser 20. In other words, the lowest point of the water pumping wheel 31 is below the large surface of the water receiving tray 60, and the bottom area of ​​the groove 61 is small, ensuring that only a small amount of condensed water remains and cannot be pumped out, and can be discharged through the drain port 62.

[0061] In this embodiment, there is a heat-insulating gap between the water receiving pan 60 and the bottom shell 50. In this way, the water receiving pan 60 and the bottom shell 50 are equivalent to air insulation, which prevents the coldness of the condensed water generated by the evaporator 10 from being transmitted to the bottom of the bottom shell 50 and forming condensation at the bottom of the bottom shell 50.

[0062] Furthermore, a support rib is provided at the insulation gap, and the upper and lower ends of the support rib are respectively connected to the water receiving tray 60 and the bottom shell 50, and there are multiple support ribs, which are arranged at intervals. Through the above arrangement, the connection strength between the water receiving tray 60 and the bottom shell 50 can be improved, ensuring that the water receiving tray 60 is firmly arranged on the bottom shell 50.

[0063] From the above description, it can be seen that the above embodiment of the present invention achieves the following technical effects: by setting the heat exchange assembly including the evaporator 10, the condenser 20 and the water pumping member 30, the bottom of the condenser 20 is provided with a avoidance structure 211 penetrating along the thickness direction, the water pumping member 30 includes a water pumping dial 31 and a water pumping motor 32, the water pumping dial 31 is located in the water pumping space 40 in the middle of the condenser 20, the output shaft of the water pumping motor 32 is penetrated through the avoidance structure 211 and is connected to the water pumping dial 31 for driving the water pumping dial 31 to rotate, so that by providing the avoidance structure 211 at the bottom of the condenser 20 for the output shaft of the water pumping motor 32 to pass through, the height layout of the condenser 20 can be reduced, so that the vertical misalignment between the condenser 20 and the water pumping dial 31 is reduced, and the water pumped up by the water pumping dial 31 can be more pumped on the fins of the condenser 20, greatly improving the water pumping evaporation efficiency. In addition, through the above arrangement, the layout space of the condenser 20 can be reduced, thereby reducing the shell height of the air conditioner.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0066] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0069] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0070] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchange component, characterized in that: The invention comprises an evaporator (10), a condenser (20) and a water pumping member (30); the bottom of the condenser (20) is provided with an avoidance structure (211) penetrating in the thickness direction; the water pumping member (30) comprises a water pumping dial (31) and a water pumping motor (32); the water pumping dial (31) is located in a water pumping space (40) in the middle of the condenser (20); the output shaft of the water pumping motor (32) is passed through the avoidance structure (211) and is drivingly connected to the water pumping dial (31) for driving the water pumping dial (31) to rotate.

2. The heat exchange assembly according to claim 1, characterized in that: The avoidance structure (211) is an avoidance gap or an avoidance hole.

3. The heat exchange assembly according to claim 2, characterized in that: The distance H between the avoidance structure (211) and the bottom end of the condenser (20) is 14 mm to 20 mm.

4. The heat exchange assembly according to claim 1, characterized in that: The condenser (20) comprises a main body (21) and a connecting plate (22), wherein the main body (21) is divided into two parts, the first ends of the two main bodies (21) are connected, an angle is formed between the two main bodies (21) and the second ends are connected via the connecting plate (22) to enclose the closed water pumping space (40), and the avoidance structure (211) is located on one of the main bodies (21).

5. An air conditioner, characterized in that: The heat exchange component comprises the heat exchange component according to any one of claims 1 to 4.

6. The air conditioner according to claim 5, characterized in that: The air conditioner further comprises a bottom shell (50) and a water receiving tray (60), wherein the water receiving tray (60) is arranged on the bottom shell (50), and the heat exchange component is located above the water receiving tray (60), so that the condensed water generated by the evaporator (10) is collected by the water receiving tray (60) and flows to the water pumping member (30).

7. The air conditioner according to claim 6, characterized in that: The water receiving tray (60) has a groove (61), one end of the groove (61) is located below the water pumping wheel (31), and the other end extends to the water outlet (62) of the water receiving tray (60).

8. The air conditioner according to claim 7, characterized in that: At least a portion of the water pumping wheel (31) is located in the groove (61).

9. The air conditioner according to claim 6, characterized in that: A heat-insulating gap is provided between the water receiving tray (60) and the bottom shell (50).

10. The air conditioner according to claim 9, characterized in that: Support ribs are provided at the thermal insulation gap, and upper and lower ends of the support ribs are respectively connected to the water receiving tray (60) and the bottom shell (50), and there are a plurality of support ribs, which are arranged at intervals.

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