Air conditioning unit with wind and sand prevention function

Abstract

The utility model relates to an air conditioning unit with a wind and sand prevention function, which comprises a shell, a condensation air outlet and a condensation air inlet are arranged on the shell, an air outlet protection component is arranged at the condensation air outlet, an air inlet filtering component is arranged at the condensation air inlet, and a movable bottom plate capable of being pulled and detached is arranged at the bottom of the shell. Grit entering the shell is deposited on the movable bottom plate. The sand-proof device not only can improve the sand-proof capacity of the air conditioning unit, is easy to collect and clean grit, but also can effectively filter grit with larger diameter, prevents the grit from impacting cooling fins of a condenser in the air conditioning unit, reduces the damage degree of components of the unit, and prolongs the service life of the components.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning, and particularly relates to an air conditioning unit with a sandstorm prevention function. Background Art

[0002] Industrial air-conditioning units provide environmental temperature, humidity and cleanliness guarantee for the reliable operation of industrial product production process or industrial process equipment, such as constant temperature and humidity air conditioners used to ensure the normal operation of equipment in electrical control room, special air conditioners for high temperature environment used in mobile bridge cranes in steelmaking workshops, low temperature unit air conditioners used in meat processing workshops, etc. Due to the particularity of the working environment, a large amount of dust will enter the interior of the industrial air-conditioning unit when it is working. If there is too much dust inside the air-conditioning unit, the dust will be easily discharged through the air-conditioning unit and then inhaled into the body by the workers, causing harm. At the same time, the external sand and gravel will also impact the internal condenser fins, damage the fins, and affect the heat exchange efficiency of the air-conditioning unit.

[0003] In the patent No. 202223500054.5, there is disclosed a sand-discharging air conditioner and energy storage cabinet, wherein the inner cavity of the shell is provided with a middle partition, and the middle partition divides the inner cavity of the shell into an indoor compartment and an outdoor compartment; the evaporation system is provided in the indoor compartment, and the condensation system is provided in the outdoor compartment; at least two sand-discharging ports are provided on one side corresponding to the bottom of the outdoor compartment, and a sand-discharging base is provided in the outdoor compartment, and the sand-discharging base is installed obliquely, and the sand and gravel gathered on the surface of the sand-discharging base can be discharged to the outside from the sand-discharging port. However, in this sand-discharging structure, if there is windy and snowy weather, the sand inside the unit is easy to form a mud-sand mixture, the viscosity between the sand and gravel increases, and the fluidity is insufficient, which is more likely to cause the sand-discharging hole to be blocked, resulting in poor sand-discharging performance. At the same time, there is no protective structure at the air inlet and outlet of the outdoor compartment. In the weather with strong wind and sand, the sand and gravel outside will still impact the internal condenser fins and cause damage to the fins, and more sand and gravel will enter the shell. Only relying on the sand-discharging base and sand-discharging port at the bottom to collect sand and discharge sand is limited in effect. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide an air conditioning unit with wind and sand prevention function which can improve the anti-sand capability of the air conditioning unit, is easy to collect and clean sand and gravel, and can effectively protect internal components and increase the service life of the components.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] An air conditioning unit with a wind and sand protection function comprises a shell, a condensation air outlet and a condensation air inlet are arranged on the shell, an air outlet protection component is arranged at the condensation air outlet, an air inlet filter component is arranged at the condensation air inlet, and a pull-out and detachable movable bottom plate is arranged at the bottom of the shell, and sand and gravel entering the shell are deposited on the movable bottom plate.

[0007] Furthermore, the air outlet protection assembly includes a first cover and a first filter. The cover body of the first cover is fixed on the shell at the condensation air outlet. A plurality of first ventilation holes are opened on the first cover. The first filter is installed inside the first cover. Sand discharge holes are opened on the bottom plate of the first cover.

[0008] Furthermore, a first elongated opening is provided on the side plate of the first cover, and the first filter net can be pulled out from the first opening and installed in the first cover.

[0009] Furthermore, a first limiting boss extending along the pulling direction is provided on the top plate and the bottom plate of the first cover, the first filter moves against the first limiting boss, and a first fixing structure for fixing the first filter is provided on the side plate of the first cover opposite to the first opening.

[0010] Furthermore, the air inlet filter assembly includes a second cover and a second filter screen, a plurality of second ventilation holes are opened on the second cover, the second filter screen is installed inside the second cover, and the bottom of the second cover is open.

[0011] Furthermore, the second filter is installed obliquely inside the second cover, and the front and rear ends of the second filter are respectively connected to the cover body of the second cover above the second ventilation hole and the shell below the condensation air inlet.

[0012] Furthermore, a second long strip opening is provided on the front panel of the second cover, and the second filter net can be pulled out from the second opening and installed in the second cover.

[0013] Furthermore, the side panels on both sides of the second cover are provided with second limiting bosses extending in the pulling direction, and the bottom of the second limiting bosses is provided with a second fixing structure for fixing the second filter screen.

[0014] Furthermore, the movable bottom plate includes a bottom plate body and a baffle plate arranged on the outside of the bottom plate body and protruding upward. There is a sand discharge gap between the bottom of the shell and the bottom plate body. The baffle plate closes the sand discharge gap at the bottom of the shell after installation. At least one handle is installed on the baffle plate, and a plurality of drainage holes are arranged on the movable bottom plate.

[0015] Furthermore, a fixed bottom plate is provided at the bottom of the shell, and the movable bottom plate is pulled and moved along a preset direction relative to the fixed bottom plate. A third limiting boss extending along the pulling direction is provided at the bottom of the side plates on both sides of the shell, and a third fixing structure for fixing the movable bottom plate is provided at the end of the third limiting boss.

[0016] In summary, the air conditioning unit with wind and sand protection function provided by the utility model has the following advantages compared with the prior art:

[0017] (1) The utility model is provided with protective and filtering components at the condensation air outlet and the condensation air inlet, respectively, which can play a good protective and filtering role against external sand and gravel. Sand and gravel with larger diameters will be blocked outside the shell, and sand and gravel with smaller diameters will also be deposited on the movable bottom plate at the bottom. The movable bottom plate can be regularly disassembled and pulled out for cleaning, and the sand accumulated in the unit can be cleaned at one time. It is simple and effective, and can solve the problem that the mud and sand mixture is difficult to discharge due to insufficient fluidity, and can greatly improve the wind and sand protection ability of the air-conditioning unit.

[0018] (2) The utility model can effectively filter sand and gravel with a diameter greater than 0.9 mm by arranging protection and filtering components at the condensation air outlet and the condensation air inlet, thereby preventing the sand and gravel from impacting the condenser heat dissipation fins inside the air-conditioning unit, reducing the degree of damage to the unit components and increasing the service life of the components.

[0019] (3) The utility model can ensure that the filtered sand and gravel can be discharged smoothly and will not accumulate inside by arranging sand discharge holes at the bottom of the first cover, designing the bottom of the second cover to be an open structure, and arranging a removable movable bottom plate structure.

[0020] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0022] In the attached picture:

[0023] Figure 1 This is a schematic diagram of the outdoor structure of the air-conditioning unit of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the air outlet protection component of the air conditioner unit of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the air inlet filter assembly of the utility model air conditioning unit;

[0026] Figure 4 It is a schematic diagram of the bottom structure of the air-conditioning unit shell of the utility model.

[0027] In the figure:

[0028] Shell 1, back plate 11, middle partition plate 2;

[0029] Air outlet protection assembly 3, first cover 31, first filter screen 32, first ventilation hole 33, sand discharge hole 34, first opening 35, mounting edge 36, first limiting boss 37, first fixing structure 38;

[0030] Air inlet filter assembly 4, second cover 41, second filter screen 42, second ventilation hole 43, mounting edge 44, second limiting boss 45, second fixing structure 46, air guide louver 47;

[0031] The movable bottom plate 5 , the bottom plate body 51 , the baffle 52 , the handle 53 , the drainage hole 54 , the third fixing structure 55 , and the fixed bottom plate 6 .

[0032] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figures 1 to 4 As shown, the utility model provides an air conditioning unit with a wind and sand protection function, which is an industrial air conditioning unit with an integrated structure.

[0037] The air conditioning unit comprises a shell 1, in which a middle partition plate 2 is arranged in the inner cavity of the shell 1, and the middle partition plate 2 divides the inner cavity of the shell 1 into two left and right chambers, namely an indoor chamber and an outdoor chamber (not shown in the figure). Figure 4 The part shown in is the part of the outdoor cavity. The evaporator, evaporation fan, etc. are installed in the indoor cavity, and the condenser, condensation fan and compressor, etc. are installed in the outdoor cavity. Corresponding to the outdoor cavity, a condensation air inlet and a condensation air outlet (not shown in the figure) are opened on the back plate 11 of the shell 1, and the condensation air inlet is arranged below the condensation air outlet. Under the action of the condensation fan, the outside air enters the outdoor cavity from the condensation air inlet, flows upward through the condenser for heat exchange, and then flows out from the condensation air outlet.

[0038] In this embodiment, an air outlet protection assembly 3 is provided at the condensation air outlet, an air inlet filter assembly 4 is provided at the condensation air inlet, and a removable movable bottom plate 5 is provided at the bottom of the shell 1. The sand and gravel entering the shell 1 are deposited on the movable bottom plate 5, and the movable bottom plate 5 can be disassembled and pulled out when the sand and gravel need to be cleaned.

[0039] In this embodiment, protective and filtering components are separately provided at the condensation air outlet and the condensation air inlet, respectively, which can play a good protective and filtering role against external sand and gravel. Sand and gravel with larger diameters (such as sand and gravel with a diameter greater than 0.9 mm) will be blocked outside the shell 1 and will not enter the shell 1 and impact the internal condenser fins. At the same time, sand and gravel with smaller diameters that enter the shell 1 will also be deposited on the movable bottom plate 5 at the bottom, and can be regularly disassembled and pulled out for cleaning. This is simple and effective. This structure can greatly improve the air-conditioning unit's ability to prevent wind and sand.

[0040] like Figure 1 and Figure 2As shown, in this embodiment, preferably, the air outlet protection assembly 3 includes a first cover 31 and a first filter 32. The cover body of the first cover 31 is in a box shape with an open back. The cover body of the first cover 31 is fixed to the housing 1 at the condensation air outlet by multiple screws. A plurality of first ventilation holes 33 are opened on the front panel of the first cover 31. The first filter 32 is installed inside the first cover 31. The first ventilation holes 33 can play the role of the first layer of protection, and larger debris and gravel can be blocked outside. The first filter 32 can play the role of the second layer of protection and filtering. A sand discharge hole 34 is opened on the bottom plate of the first cover 31. In this embodiment, the direction toward the outside world is the front, and the direction toward the housing 1 is the back.

[0041] In this embodiment, the first ventilation holes 33 are in the shape of a hexagonal honeycomb mesh, which can both isolate foreign matter and ensure ventilation area.

[0042] In this embodiment, it is further preferred that the first filter 32 is installed in the vertical direction and is arranged in parallel with the front panel of the first cover 31 and the condensation outlet of the shell 1. The first filter 32 and the first ventilation hole 33 have a certain distance in the horizontal direction. The sand and gravel blocked by the first filter 32 can be discharged from the sand discharge hole 34 at the bottom at any time. The filtered sand and gravel can be effectively discharged and will not accumulate at the bottom of the first cover 31, which is beneficial to improving the sand prevention ability.

[0043] In this embodiment, in order to facilitate the cleaning of the first filter 32, it is further preferred that a long first opening 35 extending in the vertical direction is opened on the side plate on one side of the first cover 31, and the first filter 32 can be pulled out and installed in the first cover 31 from the first opening 35. The outer side of the frame of the first filter 32 has a mounting edge 36 bent to one side. After installation, the mounting edge 36 is fixed to the cover body of the first cover 31 by multiple screws. When cleaning is required, the first filter 32 can be pulled out by removing the screws. The mounting edge 36 can be used to close the first opening 35 while fixing the first filter 32.

[0044] In the present embodiment, it is further preferred that both the top plate and the bottom plate of the first cover 31 have a first limiting boss 37 extending in the pulling direction, and the first limiting boss 37 is a long strip structure. The top and bottom of the first filter 32 move against the first limiting boss 37 to ensure that the first filter 32 does not deflect when moving, so that the movement trajectory of the first filter 32 can be ensured and the deformation of the first filter 32 structure itself can be controlled when the first filter 32 is disassembled and assembled.

[0045] A first fixing structure 38 for fixing the first filter 32 is provided on the side plate of the first cover 31 opposite to the first opening 35. The first fixing structure 38 preferably adopts a clamping structure, which is composed of two clamping flaps arranged in an outward eight-shaped shape, and the clamping flaps are fixed to the side plate by screws. After the first filter 32 is pushed in, it can be clamped between the two clamping flaps, and the two clamping flaps are arranged in an outward eight-shaped shape to guide the first filter 32.

[0046] In this embodiment, the first filter screen 32 is composed of a frame and a stainless steel filter screen mounted on the frame, and the frame is composed of a frame and a crossbeam and a longitudinal beam in the middle to ensure the overall structural strength of the first filter screen 32. The stainless steel filter screen is used to filter gravel with a diameter greater than 0.9 mm. By removing the bolts, the stainless steel first filter screen 32 can be taken out of the first cover 31, thereby achieving the function of cleaning and maintaining the first filter screen 32.

[0047] like Figure 1 and Figure 3 As shown, in this embodiment, preferably, the air inlet filter assembly 4 includes a second cover 41 and a second filter 42. The cover body of the second cover 41 is in a box shape with an open back, and the cover body of the second cover 41 is fixed to the housing 1 at the condensation air inlet by a plurality of screws. A plurality of second ventilation holes 43 are opened on the front panel of the second cover 41, and the second filter 42 is installed inside the second cover 41. The second ventilation holes 43 can play the role of the first layer of protection, and larger debris and gravel can be blocked outside. The second filter 42 can play the role of the second layer of protection and filtration. The bottom of the second cover 41 is an open structure, and the outside air can enter through the second ventilation holes 43 and the bottom of the second cover 41 at the same time, so that the air intake of the condenser can be guaranteed. At the same time, the bottom is open, which can ensure that the gravel filtered by the second filter 42 is directly discharged from the bottom and will not accumulate in the second cover 41.

[0048] In this embodiment, the second ventilation holes 43 are arranged in the lower half of the front panel of the second cover 41. The second ventilation holes 43 preferably adopt a shutter structure, and an air guide shutter 47 protruding from the outside of the front panel is arranged at each second ventilation hole 43.

[0049] In this embodiment, it is further preferred that the second filter 42 is obliquely installed inside the second cover 41, and the front and rear ends of the second filter 42 are respectively connected to the cover body of the second cover 41 above the second ventilation hole 43 and the housing 1 below the condensation air inlet. The air entering from the second ventilation hole 43 and the bottom of the second cover 41 will be filtered by the second filter 42 and then enter the outdoor cavity in the housing 1 through the condensation air inlet.

[0050] In this embodiment, the second filter 42 is used to filter sand and gravel with a diameter greater than 0.9 mm. By removing the bolts, the second filter 42 can be taken out from the wind and sand protection cover, thereby achieving the purpose of cleaning and maintenance of the second filter 42, and the second filter 42 is installed obliquely to ensure the air intake area on the outdoor side of the air-conditioning unit.

[0051] In this embodiment, in order to facilitate the cleaning of the second filter 42, it is further preferred that a second long strip opening extending in the width direction is opened on the side plate on one side of the second cover 41, and the second filter 42 can be pulled out from the second opening and installed in the second cover 41. An upwardly bent mounting edge 44 is provided on the outer side of the frame of the second filter 42. After installation, the mounting edge 44 is fixed to the cover body of the second cover 41 by a plurality of screws. When cleaning is required, the second filter 42 can be pulled out by removing the screws. While the mounting edge 34 serves to fix the second filter 42, it can also be used to close the second opening.

[0052] In this embodiment, it is further preferred that the side panels on both sides of the second cover 41 are provided with second limiting bosses 45 extending in the pulling direction, the second limiting bosses 45 are in a long strip structure, and are installed obliquely on the side panels, and the two sides of the second filter 42 respectively move against the two second limiting bosses 45 to ensure that the second filter 42 will not deflect when moving. When the second filter 42 is disassembled and assembled, the movement trajectory of the second filter 42 can be ensured and the deformation of the second filter 42 structure itself can be controlled.

[0053] The second filter screen 42 is composed of a frame and a stainless steel filter screen mounted on the frame, and the frame is composed of a frame and a middle crossbeam and longitudinal beam to ensure the overall structural strength of the second filter screen 42. In this embodiment, it is further preferred that a U-shaped groove for avoiding the frame is provided at the upper edge of the second opening, which can ensure the smooth movement of the second filter screen 42 and can also help to relatively reduce the area of ​​the second opening.

[0054] A second fixing structure 46 for fixing the second filter screen 42 is provided at the bottom of the two second limiting bosses 45. The second fixing structure 46 is also preferably a clamping structure, including an upwardly tilted clamping flap, which is fixed to the side plate by screws, and the second filter screen 42 can be clamped between the clamping flap and the upper surface of the second limiting boss 45 after being pushed in. The clamping flap tilts upward to guide the second filter screen 42.

[0055] In this embodiment, the top plate of the second cover 41 is designed to have a slope, that is, a downwardly inclined structure, which can prevent the sand and gravel discharged from the sand discharge holes 34 at the bottom of the first cover 31 above from accumulating on the top of the second cover 41, and the fallen sand and gravel can directly slide down along the inclined second cover 41.

[0056] like Figure 1 and Figure 4 As shown, in this embodiment, preferably, the movable bottom plate 5 includes a bottom plate body 51 and a baffle 52 arranged on the outside of the bottom plate body 51 and protruding upward. A certain distance is spaced between the bottom of the back plate 11 of the shell 1 and the bottom plate body 51 to form a sand discharge gap (not marked in the figure). After installation, the baffle 52 closes the sand discharge gap at the bottom of the back plate 11. The baffle 52 is fixed to the bottom of the back plate 11 of the shell 1 by screws. The baffle 52 is bent integrally with the bottom plate body 51. At least one handle 53 is installed on the baffle 52. Preferably, two handles 53 are arranged. The handle 53 is in an inverted L-shaped structure and is welded to the baffle 52.

[0057] A plurality of drainage holes 54 are also provided on the bottom plate body 51 of the movable bottom plate 5, preferably four drainage holes 54 are provided, and water dripping on the bottom plate body 51 can be directly discharged from the drainage holes 54. When the movable bottom plate 5 needs to be cleaned, the screws on the baffle 52 need only be removed to pull out the movable bottom plate 5, and after cleaning, it can be installed back to the bottom of the housing 1 and fixed with screws.

[0058] In this embodiment, a fixed bottom plate 6 is provided at the bottom of the shell 1, and the fixed bottom plate 6 is fixedly connected to the bottom of the middle partition plate 2 and the side plates on both sides of the shell 1. The movable bottom plate 5 is pulled and moved along a preset direction relative to the fixed bottom plate 6. At least a portion of the fixed bottom plate 6 and the movable bottom plate 5 are overlapped with each other, or the fixed bottom plate 6 covers the entire bottom of the shell 1, and the movable bottom plate 5 is placed above the fixed bottom plate 6.

[0059] A third limiting boss (not shown) extending along the pulling direction is provided at the bottom of the side panels on both sides of the shell 1. The third limiting boss can directly adopt a folding structure bent toward the center from the bottom of the side panel of the shell 1, and the movable bottom plate 5 moves on the folding edges on both sides.

[0060] The end of the third limiting boss is provided with a third fixing structure 55 for fixing the movable bottom plate 5. The third fixing structure 55 is also preferably a clamping structure, including an upwardly tilted clamping flap, which is fixed to the side plate by screws, and the movable bottom plate 5 can be clamped between the clamping flap and the upper surface of the third limiting boss after being pushed in. The upward tilting of the clamping flap can guide the movable bottom plate 5.

[0061] The air conditioning unit with wind and sand protection function provided by the utility model has the following advantages:

[0062] 1. The utility model is provided with protective and filtering components at the condensation air outlet and the condensation air inlet respectively, which can play a good protective and filtering role against external sand and gravel. Sand and gravel with larger diameters will be blocked outside the shell, and sand and gravel with smaller diameters will also be deposited on the movable bottom plate at the bottom. The movable bottom plate can be regularly disassembled and pulled out for cleaning. The sand accumulated in the unit can be cleaned at one time, which is simple and effective, and can solve the problem that the mud and sand mixture is difficult to discharge due to insufficient fluidity, and can greatly improve the anti-wind and sand capability of the air-conditioning unit.

[0063] 2. The utility model can effectively filter sand and gravel with a diameter greater than 0.9 mm by arranging protection and filtering components at the condensation air outlet and the condensation air inlet, thereby preventing the sand and gravel from impacting the condenser heat dissipation fins inside the air-conditioning unit, reducing the degree of damage to the unit components and increasing the service life of the components.

[0064] 3. The utility model provides a sand discharge hole at the bottom of the first cover, designs the bottom of the second cover into an open structure, and provides a pull-out movable bottom plate structure, so that the filtered sand and gravel can be discharged smoothly without accumulation inside.

[0065] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. An air conditioning unit with wind and sand protection function, comprising a housing, on which a condensation air outlet and a condensation air inlet are arranged, characterized in that: An air outlet protection component is arranged at the condensation air outlet, an air inlet filter component is arranged at the condensation air inlet, and a removable movable bottom plate is arranged at the bottom of the shell, and the gravel entering the shell is deposited on the movable bottom plate.

2. The air conditioning unit with wind and sand protection function according to claim 1, characterized in that: The air outlet protection assembly includes a first cover and a first filter. The cover body of the first cover is fixed on the shell at the condensation air outlet. A plurality of first ventilation holes are opened on the first cover. The first filter is installed inside the first cover. Sand discharge holes are opened on the bottom plate of the first cover.

3. The air conditioning unit with wind and sand protection function according to claim 2, characterized in that: A first long strip opening is provided on the side plate of the first cover, and the first filter net can be pulled out from the first opening and installed in the first cover.

4. The air conditioning unit with wind and sand protection function according to claim 3, characterized in that: A first limiting boss extending along the pulling direction is provided on the top plate and the bottom plate of the first cover, the first filter screen moves against the first limiting boss, and a first fixing structure for fixing the first filter screen is provided on the side plate of the first cover opposite to the first opening.

5. The air conditioning unit with wind and sand protection function according to claim 1, characterized in that: The air inlet filter assembly includes a second cover and a second filter screen. The second cover is provided with a plurality of second ventilation holes. The second filter screen is installed inside the second cover. The bottom of the second cover is open.

6. The air conditioning unit with wind and sand protection function according to claim 5, characterized in that: The second filter is installed obliquely inside the second cover, and the front and rear ends of the second filter are respectively connected to the cover body of the second cover above the second ventilation hole and the shell below the condensation air inlet.

7. The air conditioning unit with wind and sand protection function according to claim 5, characterized in that: A second long strip opening is provided on the front panel of the second cover, and the second filter net can be pulled out from the second opening and installed in the second cover.

8. The air conditioning unit with wind and sand protection function according to claim 7, characterized in that: The side panels on both sides of the second cover are provided with second limiting bosses extending along the pulling direction, and the bottom of the second limiting bosses is provided with a second fixing structure for fixing the second filter screen.

9. The air conditioning unit with wind and sand protection function according to any one of claims 1 to 8, characterized in that: The movable bottom plate includes a bottom plate body and a baffle plate arranged on the outside of the bottom plate body and protruding upward. A sand discharge gap is provided between the bottom of the shell and the bottom plate body. The baffle plate closes the sand discharge gap at the bottom of the shell after installation. At least one handle is installed on the baffle plate. A plurality of drainage holes are provided on the movable bottom plate.

10. The air conditioning unit with wind and sand protection function according to claim 9, characterized in that: A fixed bottom plate is provided at the bottom of the shell, and the movable bottom plate is pulled and moved along a preset direction relative to the fixed bottom plate. A third limiting boss extending along the pulling direction is provided at the bottom of the side plates on both sides of the shell, and a third fixing structure for fixing the movable bottom plate is provided at the end of the third limiting boss.

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