Air distribution device and air conditioning unit

Abstract

The present invention relates to the technical field of air-conditioning units, and specifically to an air distribution device and an air-conditioning unit. The air-conditioning unit includes a compressor, an evaporator, a centrifugal fan and an air distribution device. The air distribution device includes an air distribution hood and a flow equalizing plate. An air duct that runs through along a first direction is formed in the air distribution hood. The air duct has an air inlet end and an air outlet end that are relatively arranged. The air inlet end is connected to the centrifugal fan, and the air outlet end is connected to the evaporator, wherein the area of ​​the cross section of the air outlet end perpendicular to the first direction is larger than the area of ​​the cross section of the air inlet end perpendicular to the first direction. The flow equalizing plate is located in the air duct, and there are multiple flow equalizing plates, and the multiple flow equalizing plates are arranged in sequence along the direction perpendicular to the first direction. In the above-mentioned air distribution device, multiple flow equalizing plates can guide the high-velocity air at the air inlet end to the surroundings of the air outlet end, so that the air sent by the centrifugal fan is more evenly distributed on the surface of the evaporator, effectively solving the problems of the existing air distribution device where the air duct is too short, the wind pressure is too high, and the air distribution in the air duct is uneven.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning units, and in particular to an air distribution device and an air conditioning unit. Background Art

[0002] Aircraft ground air conditioning units refer to air conditioning equipment that provides cooling air for aircraft parked at the airport. When working, fresh air is directly evaporated and cooled by the refrigeration system or heated by the electric heater, and then sent into the cabin and the cockpit through the aircraft's air supply port via an insulated delivery hose and quick connector to provide cooling air of a certain flow, temperature and pressure for aircraft parked at the airport.

[0003] Aircraft ground air conditioning units generally include a compressor, an evaporator, a centrifugal fan and an air distribution device. The centrifugal fan is connected to the evaporator through the air distribution device, and in order to meet the requirements of large air volume and high static pressure of the aircraft ground air conditioning unit, the centrifugal fan usually adopts a high static pressure blower.

[0004] However, for the existing air distribution device of the aircraft ground air conditioning unit, due to structural limitations, the air duct of the air distribution device is too short and the wind pressure is too high, while the centrifugal fan outlet is small and the evaporator inlet area is large, resulting in uneven wind speed on the evaporator surface. The wind speed in the center directly opposite the outlet is very high, while there is almost no wind in the surrounding areas, which causes uneven heat exchange and poor energy efficiency of the aircraft ground air conditioning unit. For example, the patent with patent number CN205579897U discloses an evaporator air distribution device, which divides the air duct into several single air ducts through a grid-shaped air distribution plate to achieve uniform air distribution. Although this structure has a certain wind distribution effect, the air volume around the evaporator is still small, and the processing of the air distribution plate and the air distribution cover is too complicated; another example is an air distribution device using a porous plate structure perpendicular to the air supply direction, which adjusts the size of each opening on the surface according to the air flow rate to distribute the air. This structure has a large wind resistance, a large air volume loss, and a relatively poor wind distribution effect. Summary of the invention

[0005] The main purpose of the present invention is to provide an air distribution device and an air conditioning unit, aiming to solve the problem that the air distribution device of the existing air conditioning unit distributes air unevenly, resulting in uneven heat exchange and poor energy efficiency of the air conditioning unit.

[0006] In order to achieve the above technical problems, the present invention provides an air distribution device, which includes an air distribution hood and a flow equalizing plate. An air duct running through along a first direction is formed in the air distribution hood. The air duct has an air inlet end and an air outlet end relatively arranged, wherein the area of ​​the cross-section of the air outlet end perpendicular to the first direction is larger than the area of ​​the cross-section of the air inlet end perpendicular to the first direction. The flow equalizing plate is located in the air duct. A plurality of the flow equalizing plates are provided, and the plurality of the flow equalizing plates are arranged in sequence along a direction perpendicular to the first direction.

[0007] Optionally, a spoiler structure is also formed on the flow balancing plate.

[0008] Optionally, the spoiler structure is a protrusion formed in the middle part of the flow balancing plate.

[0009] Optionally, the distances between two adjacent current equalizing plates are not completely the same.

[0010] Optionally, a guide structure extending along the direction of the air distribution cover is formed at one end of the flow equalizing plate close to the air outlet end.

[0011] Optionally, an extension direction of the current equalizing plate is parallel to the first direction.

[0012] Optionally, the distance between two adjacent current equalizing plates is adjustable.

[0013] Optionally, the air distribution device also includes a screw guide column and a nut, the screw guide column has a thread, the screw guide column passes through the air distribution cover and the multiple flow equalizing plates and is fixed to the air distribution cover through the nut, and the position of the flow equalizing plate on the screw guide column and the number of the flow equalizing plates are both adjustable.

[0014] Optionally, a through hole is formed on the flow equalizing plate for the screw guide column to pass through, and the air distribution device also includes a sleeve, which is sleeved outside the screw guide column and located between the two flow equalizing plates, and the outer diameter of the sleeve is larger than the diameter of the through hole.

[0015] Optionally, the screw guide column and the nut are both made of corrosion-resistant materials;

[0016] The sleeve and the flow equalizing plate are both made of weather-resistant materials.

[0017] Optionally, the air distribution hood includes a first main body and a second main body, the air inlet end is arranged on the first main body, and the air outlet end is arranged on the second main body, along the direction from the air inlet end to the air outlet end, the outer contour area of ​​the first main body remains unchanged, and the outer contour area of ​​the second main body gradually increases, and the flow equalizing plate is located in the air duct inside the first main body.

[0018] Optionally, the air dividing hood includes a main hood body and a cover body connected to each other, the main hood body has an opening, the cover body closes the opening and forms the air dividing hood with the main hood body, and the cover body is detachably connected to the main hood body.

[0019] In addition, the present invention also provides an air conditioning unit, which includes a compressor, an evaporator, a centrifugal fan and an air distribution device as described in any one of the above items, wherein the air inlet end is connected to the centrifugal fan, and the air outlet end is connected to the evaporator.

[0020] The beneficial effects of the present invention are as follows: in the above-mentioned air distribution device, an air duct is formed in the air distribution hood and runs through along a first direction, the air duct has a relatively arranged air inlet end and an air outlet end, the air inlet end is used to connect to the centrifugal fan, and the air outlet end is used to connect to the evaporator. When working, the air is sent into the air duct through the air inlet end with a relatively small cross-sectional area via the outlet of the centrifugal fan, and then sent to the evaporator through the air outlet end with a relatively large cross-sectional area to complete the heat exchange process. By arranging a plurality of flow equalizing plates arranged in sequence along a direction perpendicular to the first direction in the air duct, the high-velocity air at the air inlet end can be diverted to the surroundings of the air outlet end, so that the air delivered by the centrifugal fan is more evenly distributed on the surface of the evaporator, effectively solving the problems of the existing air distribution device with too short air duct, too high wind pressure and uneven air distribution in the air duct, and the air distribution device can give full play to the function of uniform air distribution, and the air balancing effect is better, so that the heat exchange capacity of the evaporator can be fully utilized, thereby ensuring the energy efficiency of the air-conditioning unit.

[0021] In addition, multiple flow equalizing plates are used to achieve the effect of air distribution, and the overall structural setting is also relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The advantages of the above and / or additional aspects of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of the air distribution device of the present invention;

[0024] Figure 2 yes Figure 1 A cross-sectional view of a center-split air device;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the flow balancing plate of the center-split air device;

[0026] Figure 4 yes Figure 1 A schematic diagram of the structure of the sleeve of the center-split air device;

[0027] Figure 5 is a cross-sectional view of an air distribution device according to another embodiment of the present invention;

[0028] Figure 6 is a cross-sectional view of an air distribution device according to another embodiment of the present invention;

[0029] Figure 7 yes Figure 6 A schematic diagram of the structure of the flow balancing plate of the center-split air device;

[0030] in Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0031] 10. air distribution cover; 11. first main body; 111. air inlet end; 12. second main body; 121. air outlet end;

[0032] 20. flow balancing plate; 21. flow spoiler structure; 22. guide structure; 23. through hole;

[0033] 30. Screw guide column;

[0034] 40. Nut;

[0035] 50. Sleeve. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] An embodiment of the present invention provides an air distribution device for an air conditioning unit, wherein the air conditioning unit is an aircraft ground air conditioning unit, which is an air conditioning device for providing cooling air for aircraft parked at an airport. In addition to the air distribution device, the aircraft ground air conditioning unit also includes a compressor, an evaporator and a centrifugal fan. The centrifugal fan is connected to the evaporator through the air distribution device to form a sealed air supply structure between the centrifugal fan outlet and the evaporator inlet. The compressor is used to compress air. Under the action of the centrifugal fan, the air is sent to the evaporator through the centrifugal fan outlet through the air distribution device, and the evaporator is used for heat exchange to achieve refrigeration. The treated air is then sent into the cabin and the cockpit through the air supply port of the aircraft through an insulated delivery hose and a quick connector to provide cooling air with a certain flow rate, temperature and pressure for the aircraft parked at the airport. The centrifugal fan adopts a high static pressure blower to meet the requirements of large air volume and high static pressure of the aircraft ground air conditioning unit.

[0040] In a specific embodiment, Figure 1 and Figure 2 As shown, the air distribution device includes an air distribution cover 10, which is the main body of the air distribution device, and has an air duct that runs through along a first direction. The first direction is defined as the horizontal direction shown in the figure. The left and right ends of the air distribution cover 10 are respectively provided with openings, and the air duct has an air inlet end 111 and an air outlet end 121 that are relatively arranged. The air inlet end 111 is located at the opening at the right end of the air distribution cover 10, and the air inlet end 111 is connected to the outlet of the centrifugal fan. The air outlet end 121 is located at the opening at the left end of the air distribution cover 10, and the air outlet end 121 is connected to the inlet of the evaporator, that is, connected to the side plate of the evaporator, and then at the centrifugal fan. The sealed air duct is formed between the centrifugal fan outlet and the evaporator inlet for air supply, wherein the cross-sectional area of ​​the air outlet end 121 perpendicular to the first direction is greater than the cross-sectional area of ​​the air inlet end 111 perpendicular to the first direction, and the cross-sectional areas of the air inlet end 111 and the air outlet end 121 are respectively adapted to the size of the centrifugal fan outlet and the evaporator inlet, and the air distribution device also includes a flow equalizing plate 20, which is located in the air duct, and there are multiple flow equalizing plates 20, and multiple flow equalizing plates 20 are arranged in sequence along the direction perpendicular to the first direction to divide the entire air duct into multiple single air ducts along the first direction. In this way, when the aircraft ground air conditioning unit is working, air enters the air duct through the centrifugal fan outlet through the air inlet end 111, and after being equalized by the multiple flow equalizing plates 20 arranged in sequence in the air duct, the air is evenly supplied to the evaporator surface through the air outlet end 121, so that the wind speed on the evaporator surface is uniform, so that uniform heat exchange with the evaporator can be achieved, and the energy efficiency of the entire aircraft ground air conditioning unit is high.

[0041] In the above-mentioned air distribution device, an air duct is formed in the air distribution hood 10 that runs through the first direction, and the air duct has an air inlet end 111 and an air outlet end 121 that are relatively arranged. The air inlet end 111 is used to connect to the centrifugal fan, and the air outlet end 121 is used to connect to the evaporator. When working, the air is sent into the air duct through the air inlet end 111 with a relatively small cross-sectional area via the centrifugal fan outlet, and then sent to the evaporator through the air outlet end 121 with a relatively large cross-sectional area to complete the heat exchange process. By arranging a plurality of flow equalizing plates 20 arranged in sequence along a direction perpendicular to the first direction in the air duct between the centrifugal fan outlet and the evaporator inlet, the high-velocity air at the air inlet end 111 can be guided to the surroundings of the air outlet end 121, so that the air delivered by the centrifugal fan is more evenly distributed on the surface of the evaporator, effectively solving the problems of the existing air distribution device with too short air duct, too high wind pressure, and uneven air distribution in the air duct. The air distribution device can give full play to the function of even air distribution, and the air balancing effect is better, so that the heat exchange capacity of the evaporator can be fully utilized, thereby ensuring the energy efficiency of the aircraft ground air conditioning unit. In addition, a plurality of flow equalizing plates 20 are used to achieve the effect of air distribution, and the overall structural setting is also relatively simple.

[0042] In this embodiment, the extension direction of the flow equalizer 20 is parallel to the first direction. By setting the flow equalizer 20 parallel to the first direction, even if the extension direction of the flow equalizer 20 is parallel to the air flow direction, and because the flow equalizer 20 is a thin plate, when performing air equalization, there is basically only a partial resistance loss along the way, and the resistance is small, so the air equalization effect of the flow equalizer 20 is better, avoiding the problem of large wind resistance of conventional air distribution devices, and meeting the requirements of large air volume and high static pressure of aircraft ground air conditioning units.

[0043] In this embodiment, reference is made to Figure 3 A spoiler structure 21 is also formed on the flow balancing plate 20. The spoiler structure 21 provided on the flow balancing plate 20 can adjust the wind passing through the air duct, and achieve a certain flow balancing effect.

[0044] Further, in the present embodiment, the spoiler structure 21 is a protrusion formed in the middle part of the equalizing plate 20. Specifically, a tiny protrusion is formed in the middle part of the equalizing plate 20, which can play a certain spoiler role and achieve the effect of slowing down the air flow speed, while no protrusions are formed at the two ends of the equalizing plate 20, which is convenient for air flow to both sides and achieves the effect of equal flow. Among them, the formation size and the number of protrusions on the equalizing plate 20 can be selected according to actual conditions to achieve a better wind equalization effect. In addition, there is no limit to the formation direction of the protrusions on the equalizing plate 20, which can be formed upward or downward. With such a structural setting, when the air passes through the equalizing plate 20, due to the structural setting of the protrusions in the middle, the air flow path can be extended, the wind speed can be slowed down, and the air can flow to the left and right ends as much as possible, thereby playing a horizontal flow equalization role and ensuring uniform wind output in the horizontal direction. Of course, in other embodiments, the flow equalizing plate 20 may also be a flat plate with no protrusions in the middle, and the flow equalizing effect is slightly weakened. Alternatively, in other embodiments, other forms of flow disturbance may be used to achieve flow disturbance through the protrusions formed by the middle part of the flow equalizing plate 20, which is relatively simple in structural setting and easy to produce and process.

[0045] In another embodiment, if Figure 5 As shown, the spacing between each two adjacent equalizing plates 20 is not exactly the same. Specifically, for uneven air discharge in the vertical direction, the spacing between each two adjacent equalizing plates 20 is adjusted, wherein the spacing between each two adjacent equalizing plates 20 can be determined according to the specific actual situation inside the air hood 10. In this embodiment, the centrifugal fan outlet is relatively offset at the upper part of the air hood 10, that is, the inclination angle of the upper part of the air hood 10 relative to the horizontal direction is smaller, while the inclination angle of the lower part of the air hood 10 relative to the horizontal direction is larger. In order to ensure that the upper and lower air discharges of the air hood 10 of this structure are uniform, it is necessary to set more equalizing plates 20 at the upper air duct position, and fewer equalizing plates 20 at the lower air duct position, that is, the spacing between two adjacent equalizing plates 20 at the upper air duct position is smaller, and the spacing between two adjacent equalizing plates 20 at the lower air duct position is larger. In this way, since the spacing between the equalizing plates 20 at the upper air duct position is smaller and the flow resistance is slightly greater than that at the lower air duct position, more air flows at the lower air duct position, so that the air is evenly distributed to the lower air duct position, thereby playing a role of equalizing flow in the vertical direction and ensuring uniform air discharge in the vertical direction. The structural arrangement of multiple equalizing plates 20 in the air duct, due to the turbulent protrusions in the middle part of the equalizing plates 20, makes the air flow to the left and right ends of the equalizing plates 20, playing a role of equalizing flow in the horizontal direction. By setting different spacings between the equalizing plates 20, the flow cross-sectional areas between the equalizing plates 20 are not completely different, playing a role of equalizing flow in the vertical direction, so as to perform flow diversion, and then the air diversion device discharges air evenly in the horizontal and vertical directions, so that the airflow directly blown to the evaporator can be slowed down and dispersed around the evaporator, so that the air is evenly distributed.

[0046] In yet another embodiment, Figure 6 and Figure 7 As shown, the end of the flow equalizing plate 20 near the air outlet end 121 is also formed with a guide structure 22 extending along the direction of the air divider 10. In this embodiment, along the direction from the air inlet end 111 to the air outlet end 121, the air divider 10 is in an expansion type, that is, the upper part of the air divider 10 is inclined upward relative to the horizontal direction, and the lower part of the air divider 10 is inclined downward relative to the horizontal direction. Therefore, for the flow equalizing plate 20 set at the upper air duct position, an upwardly inclined guide structure 22 is formed at its end, and for the flow equalizing plate 20 set at the lower air duct position, a downwardly inclined guide structure 22 is formed at its end. By selecting an upwardly inclined or downwardly inclined guide structure 22 at the end of the flow equalizing plate 20 according to the location, it is beneficial for air to flow along its direction, and the high-velocity air of the centrifugal fan is easy to diffuse to the surroundings, which is convenient for air to flow around the evaporator without dead angles for equalization. Among them, in this embodiment, the flow equalizing plate 20 with the guide structure 22 can be selected only at the uppermost air duct position and the lowermost air duct position, while the flow equalizing plate 20 without the guide structure 22 can be selected at the middle air duct position, or, the flow equalizing plate 20 at all positions can be selected with the guide structure 22 to better guide the airflow to the upper and lower edges of the evaporator. In addition, in this embodiment, the protrusions of the guide structure 22 inclined upward are formed upward, and the protrusions of the guide structure 22 inclined downward are formed downward, that is, the structures of multiple flow equalizing plates 20 are the same, which is convenient for production and processing or installation and adjustment as needed.

[0047] In this embodiment, if Figure 1 and Figure 2As shown, the air distribution device also includes a screw guide column 30 and a nut 40. The screw guide column 30 has a thread. The screw guide column 30 passes through the air distribution cover 10 and multiple equalizing plates 20 and is fixed to the air distribution cover 10 through the nut 40. Specifically, in this embodiment, the air distribution cover 10 includes a main cover body and a cover body connected to each other. The main cover body has an opening. The cover body closes the opening and forms the air distribution cover 10 with the main cover body, wherein four groups of screw guide columns 30 and nuts 40 are correspondingly arranged. During installation, four screw guide columns 30 are respectively inserted into the bottom of the main cover body, and each screw guide column 30 is fixed to the main cover body by two nuts 40 on both sides, and then the four corners of each equalizing plate 20 are respectively installed on the four screw guide columns 30, until multiple equalizing plates 20 are installed, and finally the cover body is closed, and the four screw guide columns 30 are fixed to the cover body by nuts 40. The air distribution device uses screw guide pillars 30 and nuts 40 to fix multiple equalizing plates 20 in the air duct. The installation form is very simple and the production cost is low. During installation, it is only necessary to open the cover body first, insert four screw guide pillars 30 into the four circular holes at the bottom of the main cover body, and fix it to the bottom of the main cover body through the double nuts 40 inside and outside the air distribution cover 10. Then, multiple equalizing plates 20 are placed in the air duct along the screw guide pillars 30 in sequence. The four corners of the equalizing plates 20 are respectively installed through the four screw guide pillars 30. After closing the cover body, the four screw guide pillars 30 can be fixed to the cover body by nuts 40. Moreover, since the air distribution cover 10 is composed of two parts, the main cover body and the cover body, the cover body can be opened separately to place and install the equalizing plates 20. In addition, in this embodiment, a sealing gasket is provided between the nut 40 and the air distribution cover 10. By using the nut 40 to press the sealing gasket to fix the screw guide pillars 30 on the cover body, air leakage can be prevented.

[0048] Further, in this embodiment, reference is made to Figure 3 and Figure 4, a through hole 23 is formed on the flow equalizing plate 20 for the screw guide column 30 to pass through, and the air distribution device also includes a sleeve 50, which is sleeved outside the screw guide column 30 and located between the two flow equalizing plates 20, and the outer diameter of the sleeve 50 is greater than the diameter of the through hole 23. Specifically, four through holes 23 are respectively opened on the four corners of the flow equalizing plate 20, and four screw guide columns 30 are passed through the four through holes 23 for fixing, and the position can be adjusted by moving the screw guide column 30 up and down in the air duct, wherein the through hole 23 is a circular light hole, which is convenient for sleeve the flow equalizing plate 20 on the screw guide column 30. Moreover, by setting a sleeve 50 between the two equalizing plates 20, whose inner diameter is slightly larger than the outer diameter of the screw guide column 30 and whose outer diameter is slightly larger than the diameter of the through hole 23 on the equalizing plate 20, the position of the equalizing plate 20 can be limited, that is, the distance between two adjacent equalizing plates 20 can be limited by the sleeve 50, and the inner diameter of the sleeve 50 is slightly larger than the outer diameter of the screw guide column 30, and can move up and down along the screw guide column 30. During installation, first open the cover body, insert four screw guide columns 30 into the bottom of the main cover body and fix them, then put multiple sleeves 50 and multiple equalizing plates 20 into the air duct along the screw guide column 30 in turn, place a sleeve 50 between any two equalizing plates 20, so as to limit the position between the two equalizing plates 20, and finally close the cover body, and use the nut 40 to press the sealing gasket for fixing. The overall structure of the air distribution device is simple and compact, and is fixed by the screw guide column 30 and the nut 40, without welding, and the structure is simple to process.

[0049] In this embodiment, the screw guide column 30 and the nut 40 are made of corrosion-resistant materials, such as stainless steel, which can effectively prevent the water vapor generated in the air duct from corroding the screw guide column 30 and the nut 40. Moreover, in this embodiment, the sleeve 50 and the flow equalizer 20 are made of weather-resistant materials, such as stainless steel or weather-resistant plastic materials, which have strong tolerance and avoid damage.

[0050] It is worth mentioning that in the present embodiment, the distance between two adjacent equalizing plates 20 is adjustable. Specifically, in the present embodiment, the position of any equalizing plate 20 on the screw guide column 30 and the number of equalizing plates 20 are adjustable, and the height of the sleeve 50 can be replaced. By setting the screw guide column 30, the equalizing plate 20 is set on the screw guide column 30, and the position of the equalizing plate 20 on the screw guide column 30 can be adjusted along the vertical direction and the number of the equalizing plates 20 can be adjusted according to the height of the air duct, and then the two adjacent equalizing plates 20 are limited by sleeves 50 of different heights. In this way, the position and number of the equalizing plates 20 can be adjusted according to the actual situation to achieve the best air balancing effect, avoiding the problem that the existing air balancing device cannot be adjusted according to the air balancing effect even if it is not suitable due to the welding method. The air distribution device forms a flow balancing structure by combining multiple equalizing plates 20 with adjustable spacing. The spacing of different equalizing plates 20 can be adjusted according to the actual situation to the best ratio to ensure uniform air distribution in the air duct and achieve the best air balancing effect, thereby ensuring that the heat exchange capacity of the evaporator is fully utilized. In addition, the adjustment method of the equalizing plate 20 is also very simple. It should be noted that the air balancing effect of this air distribution device is obtained through testing. The test process can determine whether the evaporator surface wind speed is reasonable by testing the temperature of the high-temperature package installed on the evaporator or the thermistor on each branch pipe. If it is not suitable, the centrifugal fan can be stopped, and the number and placement of the equalizing plates 20 and the sleeve 50 can be readjusted, and then tested again until the test is optimal and the solution is determined.

[0051] In this embodiment, the cover body is detachably connected to the main cover body. Since the cover body is detachably connected to the main cover body, when it is necessary to adjust the number and placement of the equalizing plates 20 and the sleeve 50, it is convenient to disassemble the cover body, then take out the equalizing plates 20 and the sleeve 50 from the main cover body, readjust the number and placement of the equalizing plates 20 and the sleeve 50, and adjust repeatedly until the best equalizing adjustment is achieved, wherein sleeves 50 of different lengths can be selected for limiting according to the number and placement of the equalizing plates 20. Of course, in other embodiments, it is more convenient to adjust the position of the guide plate by mechanical or automatic equipment without disassembling the cover body.

[0052] In this embodiment, if Figure 1 and Figure 2As shown, the air hood 10 includes a first body 11 and a second body 12, the air inlet end 111 is arranged on the first body 11, and the air outlet end 121 is arranged on the second body 12, along the direction from the air inlet end 111 to the air outlet end 121, the outer contour area of ​​the first body 11 remains unchanged, and the outer contour area of ​​the second body 12 gradually increases, and the flow equalizing plate 20 is located in the air duct inside the first body 11. That is, the structure of the air hood 10 is divided into two parts, one part is the first body 11 connected to the outlet of the centrifugal fan, and the first body 11 naturally extends from the outlet of the centrifugal fan in the horizontal direction, and the other part is the second body 12 connected to the evaporator side plate, and the second body 12 is a gradually expanding type, and along the direction from the air inlet end 111 to the air outlet end 121, the outer contour area of ​​the second body 12 gradually increases. By setting a naturally extending first main body 11, it is convenient to install multiple flow equalizing plates 20 in the air duct. Multiple flow equalizing plates 20 are arranged in a part of the air duct at the plane end between the centrifugal fan outlet and the evaporator inlet, and the flow equalizing plates 20 are arranged in the air duct parallel to the fluid flow direction, so that the air distribution is uniform, the air balancing effect is better, and the wind resistance is small. By setting a gradually expanding second main body 12 to connect the evaporator side plate, a sealed air supply structure is formed between the centrifugal fan outlet and the evaporator inlet.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air distribution device, characterized in that: include: An air distribution cover (10) is formed therein with an air duct extending along a first direction, the air duct having an air inlet end (111) and an air outlet end (121) arranged opposite to each other, wherein an area of ​​a cross section of the air outlet end (121) perpendicular to the first direction is greater than an area of ​​a cross section of the air inlet end (111) perpendicular to the first direction; and A flow balancing plate (20) is located in the air duct, a plurality of the flow balancing plates (20) are provided, the plurality of the flow balancing plates (20) are arranged in sequence along a direction perpendicular to the first direction, a spoiler structure (21) is also formed on the flow balancing plate (20), and a distance between two adjacent flow balancing plates (20) is adjustable; A screw guide column (30) and a nut (40), wherein the screw guide column (30) has a thread, the screw guide column (30) passes through the air distribution cover (10) and the plurality of flow equalizing plates (20) and is fixed to the air distribution cover (10) via the nut (40), and the position of the flow equalizing plates (20) on the screw guide column (30) and the number of the flow equalizing plates (20) are both adjustable.

2. The air distribution device according to claim 1, characterized in that: The spoiler structure (21) is a protrusion formed in the middle portion of the flow balancing plate (20).

3. The air distribution device according to claim 1 or 2, characterized in that: The distances between two adjacent current equalizing plates (20) are not completely the same.

4. The air distribution device according to claim 1, characterized in that: One end of the flow equalizing plate (20) close to the air outlet end (121) is also formed with a guide structure (22) extending along the direction of the air distribution cover (10).

5. The air distribution device according to claim 1, characterized in that: The extension direction of the current equalizing plate (20) is parallel to the first direction.

6. The air distribution device according to claim 1, characterized in that: The flow equalizing plate (20) is formed with a through hole (23) through which the screw guide column (30) can pass. The air distribution device also includes a sleeve (50), which is sleeved outside the screw guide column (30) and located between the two flow equalizing plates (20), and the outer diameter of the sleeve (50) is greater than the diameter of the through hole (23).

7. The air distribution device according to claim 6, characterized in that: The screw guide column (30) and the nut (40) are both made of corrosion-resistant materials; The sleeve (50) and the flow equalizing plate (20) are both made of weather-resistant materials.

8. The air distribution device according to claim 1, characterized in that: The air distribution cover (10) comprises a first main body (11) and a second main body (12); the air inlet end (111) is arranged on the first main body (11), and the air outlet end (121) is arranged on the second main body (12); along the direction from the air inlet end (111) to the air outlet end (121), the outer contour area of ​​the first main body (11) remains unchanged, and the outer contour area of ​​the second main body (12) gradually increases; the flow equalizing plate (20) is located in the air duct inside the first main body (11).

9. The air distribution device according to claim 1, characterized in that: The air separation hood (10) comprises a main hood body and a cover body connected to each other, the main hood body having an opening, the cover body sealing the opening and forming the air separation hood (10) with the main hood body, and the cover body is detachably connected to the main hood body.

10. An air conditioning unit, comprising a compressor, an evaporator, a centrifugal fan and the air distribution device according to any one of claims 1 to 9, wherein the air inlet end (111) is connected to the centrifugal fan, and the air outlet end (121) is connected to the evaporator.

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