A box-mounted screw air compressor

Abstract

The present invention discloses a box-mounted screw air compressor, which relates to the technical field of screw air compressors. The box-mounted screw air compressor includes a box-type outer shell, a fan assembly, a cooler, a shroud, a overlap plate, and a mesh plate. The box-type outer shell is prefabricated with a first cavity in which the cooler is installed. The shroud is sealed and installed at the bottom of the first cavity, and the fan assembly is installed at the bottom of the shroud. The mesh plate is located above the cooler. The mesh plate is displaced in the vertical direction by a first control component, and the base plate in the overlap plate is unfolded, thereby changing the size of the space between the cooler and the mesh plate. The present invention can change the direction of the airflow output by the fan assembly to a certain extent by adjusting the V-shaped guide plate, so that the airflow backflows and blows toward the surface of the cooler, reducing the accumulation of impurities on the surface of the cooler, and to a certain extent, can simultaneously reduce the adhesion rate of debris on the surface of the cooler when dissipating heat. By cooperating with the overlap plate, the space of the first cavity is changed to reduce the risk of heat accumulation.

Description

Technical Field

[0001] The invention relates to the technical field of screw air compressors, in particular to a box-mounted screw air compressor. Background Art

[0002] The box-mounted screw air compressor is a type of screw air compressor. As the name suggests, its exterior is packaged in a box-type shell.

[0003] In screw air compressors, the coordination between the fan assembly and the cooler is key to ensuring efficient heat dissipation and stable operation of the equipment. The fan assembly provides forced airflow, accelerates air flow, and discharges heat emitted by the cooler. The cooler is divided into an air cooler (aftercooler) and an oil cooler, which are used to reduce the temperature of compressed air and lubricating oil, respectively.

[0004] The cooling principle of the cooler is based on heat exchange. The core principle of heat exchange is: heat is transferred from the high-temperature medium to the low-temperature medium through the metal wall of the cooler (such as aluminum / copper fins). When the fan assembly cooperates with it, the heat on the cooler surface is removed by air flow, thereby reducing the temperature.

[0005] In the prior art, the cooler and fan assembly are typically mounted on top of the screw air compressor, with a mesh panel installed. The cooler and other components within the first chamber are visible from below. This creates an open structure, allowing debris and impurities from the operating environment to easily enter through this structure when the fan assembly is closed, resulting in limited protection.

[0006] When dissipating heat, the airflow is output upward from the mesh plate. Once the airflow is mixed with magnetic impurities that enter the screw air compressor during use, even if it is blown out of the mesh plate with the airflow, it is easy to accumulate on the top of the box-type housing. Because the top of a conventional screw air compressor is an open structure, when the air in the use environment blows through the top of the box-type housing, to a certain extent, the impurities on the top of the box-type housing will enter the screw air compressor. Summary of the Invention

[0007] The present invention provides a box-mounted screw air compressor, which overcomes the deficiencies described in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] A box-mounted screw air compressor includes a box-type casing, a fan assembly, a cooler, a shroud, a overlap plate, and a mesh plate. The box-type casing is prefabricated with a first cavity in which the cooler is installed. The volume of the first cavity is larger than that of the cooler. The shroud is sealed and installed at the bottom end of the first cavity, and the fan assembly is installed at the bottom end of the shroud.

[0010] The side wall of the first cavity is provided with a plurality of extendable overlapping plates, and a single overlapping plate is composed of at least two base plates, and one base plate is installed inside the other base plate.

[0011] The mesh plate is located above the cooler, and the mesh plate is displaced in the vertical direction by the first control member, so that the base plate in the overlapped plate is unfolded, thereby changing the size of the space between the cooler and the mesh plate.

[0012] The first control member is located outside the cooler, and the overlap plate is located outside the first control member.

[0013] A plurality of V-shaped guide plates are installed between the mesh plate and the cooler, and the rotation of the V-shaped guide plates is controlled by a second control member.

[0014] In some embodiments, a flow guide component for changing the direction of the airflow output by the fan assembly is installed in the air guide cover, and the flow guide component is located above the fan assembly.

[0015] In some embodiments, one air guide component is provided, which makes the airflow direction output by the fan assembly be left-right or front-back.

[0016] In some embodiments, two air guide components are provided, which enable the airflow output by the fan assembly to be directed in left-right and front-back directions.

[0017] In some embodiments, the guide assembly includes a guide vane, a linkage rod, a control rod, and a control motor. The control rod is installed at the output end of the control motor. The control rod is hinged to the linkage rod. The linkage rod is hinged to the end of one side of several guide vanes to adjust the direction of the guide vane. A rotating rod is set in the center of the guide vane.

[0018] In some embodiments, the first control member is a gas rod, and the second control member is a rotary motor.

[0019] In some embodiments, a plurality of folded-line air ducts are provided on the outer surface of the overlap plate facing the first cavity.

[0020] In some embodiments, the depth of the zigzag air duct on the surface of the overlapping plate is 1-3 cm, and the zigzag air duct includes an inclined air duct and a straight air duct. The inclined air duct is connected to the straight air duct, and the adjacent inclined air ducts are connected to form a turning part. Several electromagnets are installed on the side wall of the turning part, and the surface of the zigzag air duct is a smooth surface.

[0021] In some embodiments, a collecting groove is provided at the lowest point of the zigzag air duct, and the collecting groove is elastically embedded in the surface of the overlap plate.

[0022] In some embodiments, an automatically closable protective component is installed on the top of the mesh plate, a plurality of mesh holes are provided on the mesh plate, and the protective component is mounted and attached to the mesh plate through at least two clamping rods.

[0023] In some embodiments, the protective component includes a frame, a circulation channel, and a closing plate. Several circulation channels are vertically penetrated on the frame. The bottom end of the circulation channel is connected to the mesh hole. A closing plate is installed on the top end of the circulation channel. The closing plate is installed on the frame through a coil spring and an axis rod.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are:

[0025] 1. The present invention can change the direction of the airflow output by the fan assembly to a certain extent by adjusting the V-shaped guide plate, so that the airflow flows back to the surface of the cooler, reducing the accumulation of impurities on the surface of the cooler. To a certain extent, it can simultaneously reduce the adhesion rate of debris on the surface of the cooler during heat dissipation.

[0026] 2. The present invention changes the space of the first cavity by cooperating with the overlap plate to reduce the risk of heat accumulation.

[0027] 3. The present invention effectively and centrally removes magnetic impurities in the airflow by cooperating with the structure on the zigzag air duct.

[0028] 4. The present invention reduces the possibility of impurities entering the interior of the air compressor through the mesh plate by arranging a protective component on the top of the mesh plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and examples.

[0030] Figure 1 This is a schematic structural diagram of the box-mounted screw air compressor of the present invention;

[0031] Figure 2 This is a structural schematic diagram of the box-mounted screw air compressor of the present invention from another perspective;

[0032] Figure 3 This is a schematic structural diagram of the box-mounted screw air compressor in Example 1;

[0033] Figure 4 Schematic diagram of the state when the V-shaped guide plate is in a positive V shape;

[0034] Figure 5 Schematic diagram of the state when the V-shaped guide plate is in an inverted V shape;

[0035] Figure 6 This is a schematic structural diagram of the mesh plate in Example 1 after being controlled to rise by the first control member;

[0036] Figure 7 This is a schematic structural diagram of the box-mounted screw air compressor in Example 2;

[0037] Figure 8 Schematic diagram of the structure of the broken-line air duct in Example 3;

[0038] Figure 9 for Figure 8 A partial enlarged view of point A in the middle and a schematic diagram of the structure of the collection tank;

[0039] Figure 10 This is a schematic structural diagram of the box-mounted screw air compressor in Example 4;

[0040] Figure 11 for Figure 10 A partial enlarged view of point B in the middle and a schematic diagram of the structure of the protection component;

[0041] Figure 12 Schematic diagram of the state where the sealing piece is pushed open by the airflow;

[0042] Figure 13 It is a structural diagram of the cooperation between the closing piece and the coil spring.

[0043] Description of main reference numerals:

[0044] 1. Box-type housing; 101. First cavity; 2. Fan assembly; 3. Cooler; 4. Air deflector; 5. Overlap plate; 50. Broken-line air duct; 501. Inclined air duct; 502. Straight air duct; 503. Steering portion; 504. Electromagnet; 505. Collection tank; 51. First base plate; 511. Cavity; 52. Second base plate; 6. Mesh plate; 60. Mesh hole; 61. First control unit; 7. Screw compressor main unit; 8. Screw compressor motor; 9. Air filter; 10. Precision filter; 11. Refrigerated dryer; 12. Electronic automatic drain valve; 13. V-shaped guide plate; 130. Rod body; 131. Second control member; 14. Guide assembly; 141. Guide blade; 1411. Rotating rod; 1412. First blade; 1413. Second blade; 142. Linking rod; 143. Control rod; 144. Control motor; 15. Protective assembly; 151. Clamping rod; 152. Frame; 153. Circulation channel; 154. Closing piece; 155. Coil spring; 1551. Winding portion; 1552. Free end; 156. Shaft. DETAILED DESCRIPTION

[0045] like Figures 1-13As shown, a box-mounted screw air compressor includes a box-type casing 1, a fan assembly 2, a cooler 3, a guide cover 4, a overlap plate 5, and a mesh plate 6. The box-type casing 1 is prefabricated with a first cavity 101 in which the cooler 3 is installed. The volume of the first cavity 101 is larger than that of the cooler 3. The guide cover 4 is sealed and installed at the bottom end of the first cavity 101, and the fan assembly 2 is installed at the bottom end of the guide cover 4.

[0046] In addition to the fan assembly 2 and cooler 3 mentioned above, the specific structure of the screw air compressor also includes a screw machine host 7, a screw machine motor 8, an air filter 9, a precision filter 10, a cold dryer 11, an electronic automatic drain valve 12 and other structures, which together constitute the screw air compressor. The core of the screw air compressor is a positive displacement compressor that realizes gas compression through the meshing motion of the screw rotor. Its core lies in the rotational meshing of the twin screws (yin and yang rotors) to form a continuous gas compression chamber.

[0047] The vertical sides of the box-shaped housing 1 are equipped with corresponding air intake structures. The cooler 3 and fan assembly 2 mounted on the top of the box-shaped housing 1 work together to handle the heat inside the screw air compressor. The air-cooled cooler 3 relies on forced convection from the fan to accelerate heat dissipation from the heat sink surface. When the fan assembly 2 is activated, its internal blades are driven to rotate, drawing heat from the screw air compressor to the heat sink on the cooler 3 and finally out of the screw air compressor through the mesh plate 6.

[0048] The volume of first cavity 101 is larger than that of cooler 3, which helps to reserve space for heat dissipation. The air shroud 4 reduces air leakage and improves heat dissipation efficiency. Cooler 3 is mounted above fan assembly 2, and mesh panel 6 is mounted above cooler 3. Once the space above cooler 3 is fixed, mesh panel 6 can be directly mounted to box-type housing 1 using screws.

[0049] The side wall of the first cavity 101 has a plurality of extendable overlapping plates 5 . A single overlapping plate 5 is composed of at least two base plates, and one base plate is installed inside the other base plate.

[0050] For example, the overlap plate 5 includes a first base plate 51 and a second base plate 52. The first base plate 51 is larger than the second base plate 52. The first base plate 51 is provided with a cavity 511 for mounting the second base plate 52. The second base plate 52 slides vertically along the cavity 511 within the first base plate 51. The number and size of the base plates can be flexibly set according to the distance the mesh plate 6 moves.

[0051] By setting at least two base plates and overlapping the two base plates, the height of the two base plates after unfolding will be greater than the fixed height of the first cavity 101, thereby achieving the purpose of increasing the space of the first cavity 101 through the cooperation of the base plates.

[0052] The mesh plate 6 is located above the cooler 3 , and the mesh plate 6 is displaced in the vertical direction by the first control member 61 , so that the base plate in the overlap plate 5 is unfolded, thereby changing the size of the space between the cooler 3 and the mesh plate 6 .

[0053] The maximum height of the first base plate 51 and the second base plate 52 after being unfolded is usually set to be greater than the control stroke of the first control component 61, that is, when the first control component 61 controls the mesh plate 6 to rise to its maximum control stroke height, the second base plate 52 connected to the bottom end of the mesh plate 6 is still overlapped and connected to the first base plate 51; of course, a limit block can also be set at the bottom side end of the second base plate 52 to prevent the second base plate 52 from moving out of the cavity 511 in the first base plate 51.

[0054] The first control member 61 is located outside the cooler 3 , and the overlap plate 5 is located outside the first control member 61 .

[0055] The first control member 61 is located outside the outer edge of the cooler 3, and the overlap plate 5 is located outside the first control member 61. Taking the first cavity 101 as a rectangular parallelepiped structure as an example, four overlap plates 5 are provided. When the first control member 61 controls the mesh plate 6 to rise, the four side overlap plates 5 can still cooperate with the top mesh plate 6 to form a relatively closed space. If there is still a gap between the plates, a sealing strip can be added to improve the airtightness.

[0056] A number of V-shaped guide plates 13 are installed between the mesh plate 6 and the cooler 3, and the rotation of the V-shaped guide plates 13 is controlled by a second control member 131. The second control member 131 is located on the inner side of the overlap plate 5 and can be mounted by a frame. One end of the V-shaped guide plate 13 is connected to the output end of the second control member 131, and the other end is rotatably mounted on the side wall of the first cavity 101 through a rod 130. The overlap plate 5 is hidden in the box-type housing 1 on the outside of the side wall of the first cavity 101, and the overlap plate 5 and the first cavity 101 are separated by a certain thickness to allow the rod 130 on the right side of the V-shaped guide plate 13 to penetrate, so that the right side of the V-shaped guide plate 13 can rotate with the corresponding groove through the rod 130. The rod 130 is usually a cylindrical structure.

[0057] Under normal conditions, the V-shaped guide plate 13 presents a positive V-shape. When the upward airflow passes through the V-shaped guide plate 13, it will disperse along the inclined surface of the guide plate and continue to flow upward. After the V-shaped guide plate 13 is controlled by the second control member 131 to rotate 180 degrees, the V-shaped guide plate 13 presents an inverted V-shape. When the upward airflow passes through the V-shaped guide plate 13, part of the airflow will disperse along the inclined surface of the guide plate and flow obliquely to the lower left or lower right back to the surface of the cooler 3.

[0058] When the V-shaped guide plate 13 structure is not set, the direction of the airflow is vertical, and when it passes through the cooler 3, the effect of entraining heat and dust on the surface of the cooler 3 is fixed; after the V-shaped guide plate 13 structure is set, by adjusting the V-shaped guide plate 13 to an inverted V shape, part of the airflow will flow back toward the cooler 3, which will improve the effect of removing dust to a certain extent.

[0059] When multiple V-shaped deflectors 13 are provided, such as arranged side by side, the output end of the second control member 131 is connected to control the adjustment of the V-shaped deflectors 13. Furthermore, the synchronous rotation of multiple V-shaped deflectors 13 can be controlled by sprockets or chains, or by belts or pulleys. When multiple V-shaped deflectors 13 are installed on the same plane, they are staggered relative to the vertically mounted first control member 61.

[0060] Furthermore, a temperature sensor may be installed in the first cavity 101 and electrically connected to the second control element 131. When the temperature sensor detects that the temperature in the first cavity 101 is too high, the second control element 131 controls the V-shaped guide plate 13 to rotate 180 degrees, changing the current posture of the V-shaped guide plate 13. The second control element 131 triggers the control to adjust the posture of the V-shaped guide plate 13, typically from an inverted V-shape to a positive V-shape, because when the V-shaped guide plate 13 is in a positive V-shape, the airflow transfers heat upward more effectively.

[0061] According to some embodiments of the present invention, optionally, a flow guide component 14 for changing the direction of the airflow output by the fan assembly 2 is installed in the air guide cover 4 , and the flow guide component 14 is located above the fan assembly 2 .

[0062] The direction of the airflow output by the fan assembly 2 is changed by the flow guide component 14, so that the direction of the airflow is more diversified, and the effect of the airflow entraining dust is improved to a certain extent.

[0063] According to some embodiments of the present invention, optionally, one air guide component 14 is provided, which makes the airflow direction output by the fan assembly 2 be in the left-right direction or the front-back direction.

[0064] According to some embodiments of the present invention, optionally, two air guide components 14 are provided, which enable the airflow output by the fan assembly 2 to be directed in the left-right direction and the front-back direction.

[0065] The two air guide components 14 are installed in a stacked manner in the vertical direction, so that the direction of the airflow output by the fan assembly 2 can be more flexible.

[0066] According to some embodiments of the present invention, optionally, the guide assembly 14 includes a guide blade 141, a linkage rod 142, a control rod 143, and a control motor 144. The control rod 143 is installed at the output end of the control motor 144. The control rod 143 is hinged to the linkage rod 142. The linkage rod 142 is hinged to the end of one side of several guide blades 141 to adjust the direction of the guide blade 141. A rotating rod 1411 is set in the center of the guide blade 141.

[0067] The control principle of the guide assembly 14 is as follows: the control motor 144 is used to control the control rod 143 to rotate, and the control rod 143 is linked to the guide blades 141 through the linkage rod 142. When the position of the hinge point formed by the hinge between the control rod 143 and the linkage rod 142 changes, the linkage rod 142 will control the guide blades 141 to adjust the direction of the guide blades 141 with the rotation rod 1411 as the rotation base point. Figure 7 As an example, the structure shown in Figure 7 The middle guide blade 141 is now oriented to the upper right, and the direction of the airflow passing through the guide blade 141 is the left-right direction mentioned above. Figure 7 The guide assembly 14 is rotated 90 degrees along the horizontal plane, and the guide assembly 14 is in the front-to-back direction. Figure 1 The horizontal plane is the plane shown on the top surface of the air compressor chassis-type housing 1.

[0068] According to some embodiments of the present invention, optionally, the first control member 61 is a gas rod, and the second control member 131 is a rotary motor.

[0069] According to some embodiments of the present invention, optionally, a plurality of folded-line air ducts 50 are provided on the outer surface of the overlap plate 5 on the side facing the first cavity 101 .

[0070] Since the airflow direction output by the fan assembly 2 is adjusted by the guide component 14 and is affected by the operating environment of the screw air compressor, even if the screw air compressor is provided with a filter component at the air inlet, magnetic impurities will more or less enter the screw air compressor. Especially when inspecting and maintaining the screw air compressor, if one side of the box-type casing 1 is directly removed, the possibility and risk of magnetic impurities in the operating environment entering the box-type casing 1 are the greatest.

[0071] When the airflow output by the fan assembly 2 contains magnetic impurities, it is guided upward into the first cavity 101 and can be blown toward the zigzag air duct 50 for processing through the air guide component 14 .

[0072] According to some embodiments of the present invention, optionally, the depth of the zigzag air duct 50 on the surface of the overlapping plate 5 is 1-3 cm, and the zigzag air duct 50 includes an inclined air duct 501 and a straight air duct 502. The inclined air duct 501 is connected to the straight air duct 502, and the adjacent inclined air ducts 501 are connected to form a turning portion 503. Several electromagnets 504 are installed on the side wall of the turning portion 503, and the surface of the zigzag air duct 50 is a smooth surface.

[0073] The zigzag duct 50, with its curved design, works in conjunction with the magnetic electromagnet 504 when powered on to attract magnetic impurities. This facilitates simultaneous removal of magnetic impurities from the screw air compressor when the fan assembly 2 is activated for heat dissipation, achieving a two-pronged effect. The velocity of the magnetic impurities is reduced to a certain extent as they pass through the turning portion 503, further facilitating their absorption by the electromagnet 504. The smooth surface of the zigzag duct 50 facilitates the subsequent demagnetization of the electromagnet 504, allowing the magnetic impurities to fall down along the smooth surface.

[0074] According to some embodiments of the present invention, optionally, a collecting groove 505 is provided at the lowest point of the folded-line air duct 50 , and the collecting groove 505 is elastically embedded in the surface of the overlap plate 5 .

[0075] Collection trough 505 is used to de-energize electromagnet 504 after fan assembly 2 is turned off. This de-energizes electromagnet 504, rendering it non-magnetic and free of magnetic impurities. Electromagnet 504 then falls downward along the smooth inner wall of zigzag duct 50 into collection trough 505. The elastic snap-fit ​​installation of collection trough 505 facilitates its installation. The overall cross-section of collection trough 505 is U-shaped, a common structure for collection troughs.

[0076] According to some embodiments of the present invention, optionally, an automatically closable protective component 15 is installed on the top of the mesh plate 6, a plurality of mesh holes 60 are provided on the mesh plate 6, and the protective component 15 is mounted and attached to the mesh plate 6 through at least two clamping rods 151.

[0077] The clamping rod 151 facilitates the quick installation of the protective component 15 onto the mesh plate 6. The automatically closing protective component 15 can be used to achieve normal heat dissipation of the screw air compressor during heat dissipation. When the fan assembly 2 is turned off, the top of the screw air compressor can be temporarily closed to prevent debris in the use environment from entering the interior of the screw air compressor from top to bottom. Compared with the traditional box-mounted screw air compressor with only a mesh plate 6 on the top, the interior of this box-mounted screw air compressor with a protective component 15 is cleaner, which reduces the potential impact of debris on the internal structure of the screw air compressor and improves the service life of the screw air compressor.

[0078] According to some embodiments of the present invention, optionally, the protective component 15 includes a frame 152, a circulation channel 153, and a closing plate 154. Several circulation channels 153 are vertically penetrated on the frame 152. The bottom end of the circulation channel 153 is connected to the mesh hole 60. A closing plate 154 is installed on the top end of the circulation channel 153. The closing plate 154 is installed on the frame 152 through a coil spring 155 and an axis rod 156.

[0079] Coil spring 155 is mounted via shaft 156. Coil spring 155 includes a coiled portion 1551 and two extending free ends 1552. One free end 1552 is positionally connected to the top of sealing plate 154, while the other free end 1552 is positionally connected to the bottom of frame 152. After coil spring 155 and sealing plate 154 are mounted on frame 152, in its initial state, the free end connected to sealing plate 154, relying on the elastic force of coil spring 155, exerts a downward force on sealing plate 154, thereby sealing flow channel 153. When air enters flow channel 153 and pushes sealing plate 154 upward, coil spring 155 is deformed by the force, pushing the side end of sealing plate 154 away from frame 152. At this point, air can be discharged from the screw air compressor through the gap.

[0080] Example 1

[0081] like Figures 1-6 As shown, this embodiment provides a box-type screw air compressor, including a box-type casing 1, a fan assembly 2, a cooler 3, a guide cover 4, a overlap plate 5, and a mesh plate 6. The box-type casing 1 is prefabricated with a first cavity 101 in which the cooler 3 is installed. The volume of the first cavity 101 is larger than the volume of the cooler 3. The guide cover 4 is sealed and installed at the bottom end of the first cavity 101, and the fan assembly 2 is installed at the bottom end of the guide cover 4.

[0082] The side wall of the first cavity 101 has a plurality of extendable overlapping plates 5 . A single overlapping plate 5 is composed of at least two base plates, and one base plate is installed inside the other base plate.

[0083] The mesh plate 6 is located above the cooler 3 , and the mesh plate 6 is displaced in the vertical direction by the first control member 61 , so that the base plate in the overlap plate 5 is unfolded, thereby changing the size of the space between the cooler 3 and the mesh plate 6 .

[0084] The first control member 61 is located outside the cooler 3 , and the overlap plate 5 is located outside the first control member 61 .

[0085] A plurality of V-shaped guide plates 13 are installed between the mesh plate 6 and the cooler 3 , and the rotation of the V-shaped guide plates 13 is controlled by a second control member 131 .

[0086] The first control component 61 is a gas rod, and the second control component 131 is a rotary motor.

[0087] When the box-mounted screw air compressor in this embodiment is in use, the air rod controls the mesh plate 6 to move upward, and the base plate connected to the bottom side of the mesh plate 6 is unfolded. The mesh plate 6 and the base plate construct a new heat dissipation space. The initial heat dissipation space is the space formed by the mesh plate 6 and the first cavity 101. The new heat dissipation space is larger than the initial heat dissipation space. The larger the space, the better the effect of preventing heat accumulation. Regularly controlling the V-shaped guide plate 13 to rotate in an inverted V shape by rotating the motor is conducive to the backflow of air to the surface of the cooler 3, blowing away the dust accumulated on the top of the cooler 3. Subsequently, controlling the V-shaped guide plate 13 to rotate in a positive V shape by rotating the motor normally transfers the blown dust upward. In order to further improve the dust removal effect, structures such as electrostatic dust removal plates can be installed in the first cavity 101.

[0088] Example 2

[0089] like Figure 7 As shown, this embodiment provides a box-mounted screw air compressor. Based on the embodiment 1, this embodiment further provides the following structure:

[0090] A flow guide component 14 for changing the direction of the airflow output by the fan assembly 2 is installed in the air guide cover 4 , and the flow guide component 14 is located above the fan assembly 2 .

[0091] One air guide component 14 is provided, which makes the airflow direction output by the fan assembly 2 be left-right direction or front-back direction.

[0092] The guide assembly 14 includes a guide vane 141, a linkage rod 142, a control rod 143, and a control motor 144. The control rod 143 is installed at the output end of the control motor 144. The control rod 143 is hinged to the linkage rod 142. The linkage rod 142 is hinged to the end of one side of several guide vanes 141 to adjust the direction of the guide vane 141. A rotating rod 1411 is set in the center of the guide vane 141.

[0093] The guide assembly 14 is located above the fan assembly 2. The cooler 3 is located above the guide assembly 14, and the mesh plate 6 is located above the cooler 3. During operation, the inclination angle of the guide vanes 141 in the guide assembly 14 can be controlled to reduce the gaps between adjacent guide vanes 141, thereby preventing debris from entering the air compressor from the open space above the cooler 3.

[0094] For example, guide vanes 141 comprise first and second blades 1412 and 1413. First and second blades 1412 and 1413 are adjacent and tilted by linkage rod 142. There is an overlap between the downwardly projected horizontal plane of first and second blades 1413. By adjusting the length of guide vanes 141 and the control rods 143 and 142, the gaps between adjacent guide vanes 141 can be sealed, temporarily sealing the passage between the fan assembly and cooler 3. When fan assembly 2 is activated, the upward airflow can displace debris upward along with it.

[0095] Example 3

[0096] like Figure 8-Figure 9 As shown, this embodiment provides a box-mounted screw air compressor. Based on Example 2, this embodiment further provides the following structure:

[0097] A plurality of folded-line air ducts 50 are provided on the outer surface of the overlap plate 5 facing the first cavity 101 .

[0098] The depth of the zigzag air duct 50 on the surface of the overlapping plate 5 is 1-3 cm. The zigzag air duct 50 includes an inclined air duct 501 and a straight air duct 502. The inclined air duct 501 and the straight air duct 502 are connected to each other. The adjacent inclined air ducts 501 are connected to form a turning part 503. Several electromagnets 504 are installed on the side wall of the turning part 503. The surface of the zigzag air duct 50 is a smooth surface.

[0099] A collecting groove 505 is provided at the lowest point of the zigzag air duct 50 , and the collecting groove 505 is elastically embedded in the surface of the overlap plate 5 .

[0100] The zigzag air duct 50 in this embodiment cooperates with the electromagnet 504 and the collection tank 505 on the air duct to achieve efficient treatment of magnetic impurities in the airflow. The guide vane 141 can be tilted by the control motor 144 in the guide assembly 14 to change the direction of the airflow, so that the airflow is blown toward the zigzag air duct 50. The magnetic impurities in the airflow can be cleaned and collected in a targeted manner, preventing the magnetic impurities from being discharged from the air compressor with the heat dissipation airflow and then drifting back to the vicinity of the air compressor and then re-entering the air compressor. This reduces the adverse effects of subsequent magnetic impurities entering the air compressor, such as being sucked into the air compressor intake filter structure. Large magnetic impurities may accumulate on the filter element and cause blockage, while small particles may pass through the filter element and enter the core structural components of the air compressor and cause problems.

[0101] Example 4

[0102] like Figure 10-13As shown, this embodiment provides a box-type screw air compressor. This embodiment further provides the following structure based on Embodiment 1, 2, 3 or 4:

[0103] An automatically closable protective assembly 15 is installed on the top of the mesh plate 6 . The mesh plate 6 is provided with a plurality of mesh holes 60 . The protective assembly 15 is mounted and attached to the mesh plate 6 via at least two clamping rods 151 .

[0104] The protective component 15 includes a frame 152, a circulation channel 153, and a closing plate 154. Several circulation channels 153 are vertically penetrated on the frame 152. The bottom end of the circulation channel 153 is connected to the mesh hole 60. The top end of the circulation channel 153 is installed with a closing plate 154. The closing plate 154 is installed on the frame 152 through a coil spring 155 and a shaft 156.

[0105] The protective component 15 in this embodiment effectively improves the self-sealing effect of the fixed mesh on the mesh plate 6, so that the heat dissipation channel of debris outside the box-mounted screw air compressor is indirectly closed when the fan assembly 2 is not started; when the fan assembly 2 is started, the circulation channel 153 in the protective component 15 is opened, and since the air flow flows upward, it is difficult for debris to enter through the fixed mesh at this time.

[0106] Example 5

[0107] This embodiment provides a box-mounted screw air compressor. The difference between this embodiment and embodiment 2 is that:

[0108] Two air guide components 14 are provided, which make the airflow direction output by the fan assembly 2 be left-right direction and front-back direction.

[0109] The two guide components 14 cooperate to achieve a more refined airflow guidance. The above is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the content of the specification should still fall within the scope of the present invention.

Claims

1. A box-mounted screw air compressor, characterized in that: The system comprises a box-type housing, a fan assembly, a cooler, a shroud, a overlap plate, and a mesh plate. The box-type housing is prefabricated with a first cavity in which the cooler is installed. The volume of the first cavity is larger than that of the cooler. The shroud is sealed and installed at the bottom end of the first cavity, and the fan assembly is installed at the bottom end of the shroud. The sidewalls of the first cavity are provided with a plurality of extendable overlap plates, each of which is composed of at least two base plates, one of which is mounted inside the other base plate; the mesh plate is located above the cooler, and the mesh plate is vertically displaced by a first control member, so that the base plate inside the overlap plate is expanded, thereby changing the size of the space between the cooler and the mesh plate; The first control member is located outside the cooler, and the overlap plate is located outside the first control member; A plurality of V-shaped guide plates are installed between the mesh plate and the cooler, and the rotation of the V-shaped guide plates is controlled by a second control member.

2. The box-mounted screw air compressor according to claim 1, characterized in that: A flow guide component for changing the direction of the airflow output by the fan assembly is installed in the flow guide cover, and the flow guide component is located above the fan assembly.

3. The box-mounted screw air compressor according to claim 2, characterized in that: The air guide component is provided with one, which makes the airflow direction output by the fan assembly be left-right or front-back; or the air guide component is provided with two, which makes the airflow direction output by the fan assembly be left-right and front-back.

4. The box-mounted screw air compressor according to claim 3, characterized in that: The guide assembly includes a guide vane, a linkage rod, a control rod, and a control motor. The control rod is installed at the output end of the control motor. The control rod is hinged to the linkage rod. The linkage rod is hinged to the end of one side of several guide vanes to adjust the direction of the guide vane. A rotating rod is set in the center of the guide vane.

5. The box-mounted screw air compressor according to claim 1, characterized in that: The first control component is a gas rod, and the second control component is a rotary motor.

6. The box-mounted screw air compressor according to claim 1, characterized in that: The outer surface of the overlap plate facing the first cavity is provided with a plurality of broken line air ducts.

7. The box-mounted screw air compressor according to claim 6, characterized in that: The depth of the zigzag air duct on the surface of the overlapping plate is at least 1 cm. The zigzag air duct includes an inclined air duct and a straight air duct. The inclined air duct is connected to the straight air duct. The adjacent inclined air ducts are connected to form a turning part. Several electromagnets are installed on the side wall of the turning part. The surface of the zigzag air duct is a smooth surface.

8. The box-mounted screw air compressor according to claim 7, characterized in that: A collecting groove is provided at the lowest point of the folding-line air duct, and the collecting groove is elastically embedded in the surface of the overlap plate.

9. The box-mounted screw air compressor according to claim 1, characterized in that: An automatically closable protective component is installed on the top of the mesh plate. A plurality of mesh holes are provided on the mesh plate. The protective component is mounted and attached to the mesh plate through at least two clamping rods.

10. The box-mounted screw air compressor according to claim 9, characterized in that: The protective component includes a frame, a circulation channel, and a closing plate. Several circulation channels are vertically penetrated on the frame. The bottom end of the circulation channel is connected to the mesh hole. A closing plate is installed on the top end of the circulation channel. The closing plate is installed on the frame through a coil spring and an axis rod.

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