Box-packed screw air compressor

Abstract

The invention discloses a box-packed screw air compressor, and relates to the technical field of screw air compressors. The box-mounted screw air compressor comprises a box-type shell, a fan assembly, a cooler, a flow guide cover, an overlapping plate and a mesh plate, a first cavity provided with the cooler is prefabricated in the box-type shell, the flow guide cover is installed at the bottom end of the first cavity in a sealed mode, and the fan assembly is installed at the bottom end of the flow guide cover. The mesh plate is located above the cooler and moves in the vertical direction through the first control piece, the foundation plate in the overlapping plate is unfolded, and then the size of the space between the cooler and the mesh plate is changed. By adjusting the V-shaped guide plate, the direction of airflow output by the fan assembly can be changed to a certain extent, airflow flows back and is blown to the surface of the cooler, accumulation of impurities on the surface of the cooler is reduced, and the adhesion rate of the impurities on the surface of the cooler can be synchronously reduced to a certain extent during heat dissipation. The space of the first cavity is changed through cooperation of the first control piece and the overlapping plate, and the risk of heat accumulation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screw air compressors, and specifically to a boxed screw air compressor. Background Art

[0002] A boxed screw air compressor is a type of screw air compressor. As the name implies, it is named after being packaged by a box-shaped housing on the outside.

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

[0004] The temperature reduction principle of the cooler is based on heat exchange, and the core principle of heat exchange: heat is transferred from a high-temperature medium to a 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 surface of the cooler is carried away by the air flow, thereby reducing the temperature.

[0005] In the prior art, usually the cooler and the fan assembly are mostly installed at the top position of the screw air compressor, and a mesh plate is configured. The structures such as the cooler in the first cavity can be seen downward from the mesh plate. That is, this position is an open structure. When the fan assembly is turned off, sundries, impurities, etc. in the use environment are likely to enter through the above structures, and the protection effect is average.

[0006] During heat dissipation, the air flow outputs upward from the mesh plate. Once the air flow is mixed with magnetic impurities that enter the screw air compressor during use, even if they are blown out from the mesh plate along with the air flow, they are likely to accumulate on the top of the box-shaped housing. Since the top of the conventional screw air compressor is an open structure, when the air in the use environment blows over the top of the box-shaped housing, to a certain extent, the impurities on the top of the box-shaped housing will enter the screw air compressor again. Summary of the Invention

[0007] The present invention provides a boxed 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 problems is: A boxed screw air compressor includes a box-shaped housing, a fan assembly, a cooler, a flow guide cover, a coincidence plate, and a mesh plate. The box-shaped housing is prefabricated with a first cavity for installing the cooler. The volume of the first cavity is larger than the volume of the cooler. The flow guide cover is sealed and installed at the bottom end of the first cavity, and the fan assembly is installed at the bottom end of the flow guide cover.

[0009] The side wall of the first cavity has several extendable overlapping plates. Each overlapping plate is composed of at least two base plates, and one of the base plates is installed inside the other base plate.

[0010] The mesh plate is located above the cooler, and the mesh plate is displaced in the vertical direction by a first control member, and the base plates in the overlapping plates are unfolded, so that the size of the space between the cooler and the mesh plate is changed.

[0011] The first control member is located outside the cooler, and the overlapping plates are located outside the first control member.

[0012] A number of V-shaped flow guide plates are installed between the mesh plate and the cooler, and the V-shaped flow guide plates are controlled to rotate by a second control member.

[0013] In some embodiments, a flow guide assembly for changing the output air flow direction of the fan assembly is installed inside the flow guide cover, and the flow guide assembly is located above the fan assembly.

[0014] In some embodiments, one flow guide assembly is provided, which makes the output air flow direction of the fan assembly be the left-right direction or the front-back direction.

[0015] In some embodiments, two flow guide assemblies are provided, which make the output air flow direction of the fan assembly be the left-right direction and the front-back direction.

[0016] In some embodiments, the flow guide assembly includes flow guide vanes, a linkage rod, a control rod, and a control motor. The output end of the control motor is installed with the control rod. The control rod is hingedly connected to the linkage rod. The linkage rod is hingedly engaged with the ends of one side of several flow guide vanes to adjust the orientation of the flow guide vanes. A rotating rod is provided at the center of the flow guide vanes.

[0017] In some embodiments, the first control member is a pneumatic rod, and the second control member is a rotating motor.

[0018] In some embodiments, several zigzag air ducts are provided on the outer surface of the overlapping plate facing the first cavity.

[0019] In some embodiments, the depth of the zigzag air duct on the surface of the overlapping plate is 1-3 cm. The zigzag air duct includes an inclined air duct and a straight air duct. The inclined air duct is communicated with the straight air duct. The adjacent inclined air ducts are communicated to form a turning portion. Several electromagnets are installed on the side wall of the turning portion. The surface of the zigzag air duct is a smooth surface.

[0020] In some embodiments, a collection groove is provided at the lowest point of the zigzag air duct, and the collection groove is elastically clamped to the surface of the overlapping plate.

[0021] In some embodiments, a protective component that can automatically close is installed at the top end of the mesh plate. A number of mesh holes are provided on the mesh plate, and the protective component is installed and attached to the mesh plate through at least two clamping rods.

[0022] In some embodiments, the protective component includes a frame, a circulation channel, and a closing piece. A number of circulation channels penetrate the frame in the vertical direction. The bottom end of the circulation channel communicates with the mesh hole, and a closing piece is installed at the top end of the circulation channel. The closing piece is installed on the frame through a coil spring and a shaft rod.

[0023] By adopting the above technical solutions, the beneficial effects of the present invention are as follows: 1. By adjusting the V-shaped deflector in the present invention, the direction of the airflow output by the fan assembly can be changed to a certain extent, so that the airflow flows back and blows towards the surface of the cooler, reducing the accumulation of impurities on the surface of the cooler, and to a certain extent, the attachment rate of debris on the surface of the cooler can be synchronously reduced during heat dissipation.

[0024] 2. By cooperating the first control member with the overlapping plate in the present invention, the space of the first cavity is changed, reducing the risk of heat accumulation.

[0025] 3. By cooperating the deflector assembly with the structure on the zigzag air duct in the present invention, the magnetic impurities in the airflow can be effectively concentrated and removed.

[0026] 4. By arranging a protective component at the top end of the mesh plate in the present invention, the possibility of impurities entering the air compressor from the mesh plate is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the drawings and embodiments.

[0028] Figure 1 It is a schematic structural diagram of the whole machine of the boxed screw air compressor in the present invention; Figure 2 It is a schematic structural diagram of the whole machine of the boxed screw air compressor in another perspective in the present invention; Figure 3 It is a schematic structural diagram of the boxed screw air compressor in Embodiment 1; Figure 4 It is a schematic diagram of the state when the V-shaped deflector is in a positive V shape; Figure 5 It is a schematic diagram of the state when the V-shaped deflector is in an inverted V shape; Figure 6 It is a schematic structural diagram of the mesh plate after being controlled to rise by the first control member in Embodiment 1; Figure 7 It is a schematic structural diagram of the boxed screw air compressor in Embodiment 2; Figure 8Schematic diagram of the structure of the zigzag air duct in Embodiment 3; Figure 9 It is Figure 8 Partial enlarged view of part A in Figure 10 Schematic diagram of the structure of the boxed screw air compressor in Embodiment 4; Figure 11 It is Figure 10 Partial enlarged view of part B in Figure 12 Schematic diagram of the state where the closing piece is pushed open by the air flow; Figure 13 Schematic diagram of the structure of the closing piece in cooperation with the coil spring.

[0029] Description of main reference numerals: 1. Boxed housing; 101. First cavity; 2. Fan assembly; 3. Cooler; 4. Deflector; 5. Coincidence plate; 50. Zigzag air duct; 501. Inclined air duct; 502. Straight air duct; 503. Turning part; 504. Electromagnet; 505. Collection tank; 51. First base plate; 511. Cavity; 52. Second base plate; 6. Mesh plate; 60. Mesh hole; 61. First control member; 7. Screw machine main engine; 8. Screw machine motor; 9. Air filter; 10. Precision filter; 11. Refrigerated dryer; 12. Electronic automatic drain valve; 13. V-shaped deflector; 130. Rod body; 131. Second control member; 14. Deflection assembly; 141. Deflection blade; 1411. Rotating rod; 1412. First blade; 1413. Second blade; 142. Linking rod; 143. Control rod; 144. Control motor; 15. Protection assembly; 151. Clamping rod; 152. Frame; 153. Flow passage; 154. Closing piece; 155. Coil spring; 1551. Winding part; 1552. Free end; 156. Shaft rod. Detailed implementation manners

[0030] As Figures 1-13 shown, a boxed screw air compressor includes a boxed housing 1, a fan assembly 2, a cooler 3, a deflector 4, a coincidence plate 5, and a mesh plate 6. A first cavity 101 for installing the cooler 3 is prefabricated in the boxed housing 1. The volume of the first cavity 101 is larger than the volume of the cooler 3. The deflector 4 is hermetically installed at the bottom end of the first cavity 101, and the fan assembly 2 is installed at the bottom end of the deflector 4.

[0031] In addition to the fan assembly 2 and cooler 3 mentioned above, the specific structure of the screw air compressor further includes a screw air compressor main unit 7, a screw air compressor motor 8, an air filter 9, a precision filter 10, a refrigerated dryer 11, an electronic automatic drain valve 12, etc. These structures cooperate together to form a screw air compressor. The core of the screw air compressor is a positive displacement compressor that realizes gas compression through the meshing movement of screw rotors. Its core lies in the rotation and meshing of the twin screws (male and female rotors) to form a continuous gas compression chamber.

[0032] The vertical side of the box-type housing 1 is provided with a corresponding air intake structure. The cooler 3 and fan assembly 2 installed at the top of the box-type housing 1 cooperate to handle the heat inside the screw air compressor. The air-cooled cooler 3 relies on forced convection of the fan to accelerate the heat dissipation on the surface of the radiator fins. When the fan assembly 2 starts, the fan blades inside it are driven to rotate, pumping the heat inside the screw air compressor to and through the radiator fins on the cooler 3, and finally discharging it from the mesh plate 6 of the screw air compressor.

[0033] The volume of the first cavity 101 is larger than that of the cooler 3, which is beneficial for reserving a certain space for heat dissipation. The flow guide cover 4 reduces air leakage and improves the heat dissipation efficiency. The cooler 3 is installed above the fan assembly 2, and the mesh plate 6 is installed above the cooler 3. When the space formed above the cooler 3 is fixed, the mesh plate 6 can be directly installed on the box-type housing 1 by screwing.

[0034] The side wall of the first cavity 101 has several extendable overlapping plates 5. Each single overlapping plate 5 is composed of at least two base plates, and one of the base plates is installed inside the other base plate.

[0035] For example, the overlapping plate 5 includes a first base plate 51 and a second base plate 52. The size of the first base plate 51 is larger than that of the second base plate 52. A cavity 511 for installing the second base plate 52 is provided inside the first base plate 51, and the second base plate 52 slides vertically along the cavity 511 inside the first base plate 51. The number and size of the base plates are flexibly set according to the moving distance of the mesh plate 6.

[0036] By setting at least two base plates and overlapping them, the height after the two base plates are unfolded will be greater than the fixed height of the first cavity 101. Thus, the purpose of increasing the space of the first cavity 101 is achieved through the cooperation of the base plates.

[0037] The mesh plate 6 is located above the cooler 3, and the mesh plate 6 is displaced vertically by a first control member 61. The base plates inside the overlapping plate 5 are unfolded, and thus the size of the space between the cooler 3 and the mesh plate 6 changes.

[0038] 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.

[0039] The first control member 61 is located outside the cooler 3 , and the overlap plate 5 is located outside the first control member 61 .

[0040] The first control member 61 is located outside the outer side of the outer side 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, so that after the first control member 61 controls the mesh plate 6 to rise, the overlap plates 5 at the four side positions can still cooperate with the mesh plate 6 at the top 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.

[0041] 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 the 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 body 130. The overlap plate 5 is hidden in the box-type housing 1 where the outer side of the side wall of the first cavity 101 is located, and the overlap plate 5 and the first cavity 101 are separated by a certain thickness for the rod body 130 at the right end of the V-shaped guide plate 13 to be inserted, so that the right end of the V-shaped guide plate 13 is rotatably matched with the corresponding groove body through the rod body 130, and the rod body 130 is usually a cylindrical structure.

[0042] 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°, 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. 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 the 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.

[0043] When multiple V-shaped flow 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 flow deflectors 13. Further, a plurality of V-shaped flow deflectors 13 can be controlled to rotate synchronously through sprockets and chains, and a plurality of V-shaped flow deflectors 13 can also be controlled to rotate synchronously through belts and pulleys. When a plurality of V-shaped flow deflectors 13 in the same plane are installed, they are installed in a staggered manner with the first control member 61 installed in the vertical direction.

[0044] Furthermore, a temperature sensor can be installed in the first cavity 101, and the temperature sensor is electrically connected to the second control member 131, so that when the temperature sensor detects that the temperature in the first cavity 101 is too high, the second control member 131 controls the V-shaped flow deflector 13 to rotate 180° to change the current attitude of the V-shaped flow deflector 13. The second control member 131 triggers the control to adjust the attitude of the V-shaped flow deflector 13, usually switching from an inverted V shape to a positive V shape, because when the V-shaped flow deflector 13 presents a positive V shape, its effect of transferring heat upward by the airflow is better.

[0045] According to some embodiments of the present invention, optionally, a flow guiding assembly 14 for changing the direction of the airflow output by the fan assembly 2 is installed in the flow guiding cover 4, and the flow guiding assembly 14 is located above the fan assembly 2.

[0046] By changing the direction of the airflow output by the fan assembly 2 through the flow guiding assembly 14, the direction of the airflow becomes more diverse, and to a certain extent, the effect of the airflow carrying dust is improved.

[0047] According to some embodiments of the present invention, optionally, one flow guiding assembly 14 is provided, which makes the direction of the airflow output by the fan assembly 2 be the left-right direction or the front-back direction.

[0048] According to some embodiments of the present invention, optionally, two flow guiding assemblies 14 are provided, which make the direction of the airflow output by the fan assembly 2 be the left-right direction and the front-back direction.

[0049] The two flow guiding assemblies 14 are installed in a superimposed manner in the vertical direction, so that the direction of the airflow output by the fan assembly 2 can be more flexible.

[0050] According to some embodiments of the present invention, optionally, the flow guiding assembly 14 includes flow guiding vanes 141, a linkage rod 142, a control rod 143, and a control motor 144. The output end of the control motor 144 is installed with the control rod 143, the control rod 143 is hinged to the linkage rod 142, the linkage rod 142 is hinged to the ends of one side of several flow guiding vanes 141 to cooperate in adjusting the orientation of the flow guiding vanes 141, and a rotating rod 1411 is provided at the center of the flow guiding vanes 141.

[0051] Control principle of the flow guiding assembly 14: By controlling the motor 144, the control rod 143 is rotated. The control rod 143 is linked with a plurality of flow guiding vanes 141 through a linkage rod 142. When the position of the hinge point formed at the hinge joint of the control rod 143 and the linkage rod 142 changes, the linkage rod 142 will control the flow guiding vane 141 to adjust the orientation of the flow guiding vane 141 with the rotating rod 1411 as the rotation base point. Taking Figure 7 the structure shown in Figure 7 as an example, the orientation of the flow guiding vane 141 at this time is upper right, and the direction of the air flow passing through the flow guiding vane 141 at this time is the left-right direction described above. Rotate the flow guiding assembly 14 in Figure 7 the horizontal plane by ninety degrees, and at this time the flow guiding assembly 14 is in the front-back direction. Refer to Figure 1 , the horizontal plane is the plane shown on the top surface of the air compressor box-type housing 1.

[0052] According to some embodiments of the present invention, optionally, the first control member 61 is a pneumatic rod, and the second control member 131 is a rotating motor.

[0053] According to some embodiments of the present invention, optionally, a plurality of zigzag air ducts 50 are provided on the outer surface of the overlapping plate 5 on the side close to the first cavity 101.

[0054] Since the direction of the air flow output by the fan assembly 2 is adjusted by the flow guiding assembly 14 and is affected by the use environment of the screw air compressor, even if a filtering assembly is provided at the air inlet of the screw air compressor, more or less magnetic impurities will enter the screw air compressor. Especially when overhauling and maintaining the screw air compressor, directly remove a side surface of the box-type housing 1, and at this time, the possibility and risk of magnetic impurities in the use environment entering the box-type housing 1 are the greatest.

[0055] When magnetic impurities are mixed in the air flow output by the fan assembly 2 and are guided upward into the first cavity 101, the air flow can be blown towards the zigzag air duct 50 through the flow guiding assembly 14 for treatment.

[0056] 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. The zigzag air duct 50 includes an inclined air duct 501 and a straight air duct 502. The inclined air duct 501 is communicated with the straight air duct 502. The adjacent inclined air ducts 501 are communicated to form a turning portion 503. A plurality of electromagnets 504 are installed on the side wall of the turning portion 503. The surface of the zigzag air duct 50 is a smooth surface.

[0057] The folded air duct 50, through its folded design, cooperates with the electromagnet 504 that has magnetism in the energized state to adsorb magnetic impurities. When the fan assembly 2 starts to dissipate heat, it synchronously cleans the magnetic impurities in the screw air compressor, achieving the dual-use effect of killing two birds with one stone. When the magnetic impurities pass through the turning part 503, their flow rate is reduced to a certain extent, which is more conducive to the electromagnet 504 adsorbing the magnetic impurities. The smooth surface design of the folded air duct 50 is conducive to the magnetic impurities falling downward along the smooth surface after the electromagnet 504 is powered off and demagnetized.

[0058] According to some embodiments of the present invention, optionally, a collection groove 505 is provided at the lowest point of the folded air duct 50, and the collection groove 505 is elastically clamped to the surface of the coincidence plate 5.

[0059] The collection groove 505 is used for collecting the magnetic impurities after the fan assembly 2 is turned off and the electromagnet 504 is powered off. The electromagnet 504 no longer has magnetism, and the magnetic impurities are no longer adsorbed by the electromagnet 504. The magnetic impurities fall downward along the smooth inner wall of the folded air duct 50 into the collection groove 505. The elastically clamped installation method of the collection groove 505 improves the convenience of installing the collection groove 505. The overall cross-section of the collection groove 505 is U-shaped, which is a common structure of a groove body with a collection function.

[0060] According to some embodiments of the present invention, optionally, a protective component 15 that can be automatically closed is installed at the top of the mesh plate 6. There are several mesh holes 60 provided on the mesh plate 6, and the protective component 15 is installed and attached to the mesh plate 6 through at least two clamping rods 151.

[0061] The clamping rod 151 is conducive to quickly installing the protective component 15 onto the mesh plate 6. The screw air compressor can be normally cooled through the automatically closable protective component 15 during heat dissipation. When the fan assembly 2 is turned off, it can also temporarily close the top of the screw air compressor to prevent sundries in the use environment from entering the screw air compressor from top to bottom. Compared with the box-type screw air compressor with only a mesh plate 6 at the top in the traditional sense, the box-type screw air compressor with this protective component 15 has a higher cleanliness inside, reduces the potential impact of sundries on the internal structure of the screw air compressor, and improves the service life of the screw air compressor.

[0062] According to some embodiments of the present invention, optionally, the protective component 15 includes a frame 152, a circulation channel 153, and a closing piece 154. There are several circulation channels 153 penetrating through the frame 152 in the vertical direction. The bottom end of the circulation channel 153 communicates with the mesh hole 60, and a closing piece 154 is installed at the top end of the circulation channel 153. The closing piece 154 is installed on the frame 152 through a coil spring 155 and a shaft rod 156.

[0063] The coil spring 155 is installed through the shaft rod 156. The coil spring 155 includes a winding part 1551 and two extended free ends 1552. One of the free ends 1552 is limit-connected to the top end of the closing piece 154, and the other free end 1552 is limited to the inner bottom end of the frame 152. After the coil spring 155 and the closing piece 154 are cooperatively installed on the frame 152, in the initial state of the coil spring 155, the free end connected to the closing piece 154 relies on the elastic force of the coil spring 155, so that the closing piece 154 has a downward acting force, and then the closing piece 154 closes the flow channel 153. When air flows into the flow channel 153 and pushes up the closing piece 154, the coil spring 155 is deformed by the force, and the side end of the closing piece 154 is pushed open and does not contact the frame 152. At this time, the air flow can be discharged outside the screw air compressor from the gap.

[0064] Embodiment 1 As Figures 1-6 Shown in the figure, this embodiment provides a box-type screw air compressor, which includes a box-type housing 1, a fan assembly 2, a cooler 3, a guide cover 4, a coincidence plate 5, and a mesh plate 6. The box-type housing 1 is prefabricated with a first cavity 101 for installing the cooler 3. The volume of the first cavity 101 is larger than the volume of the cooler 3. The guide cover 4 is hermetically 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.

[0065] There are several extendable coincidence plates 5 on the side wall of the first cavity 101. Each coincidence plate 5 is composed of at least two base plates, and one of the base plates is installed inside the other base plate.

[0066] The mesh plate 6 is located above the cooler 3, and the mesh plate 6 is displaced in the vertical direction through the first control member 61. The base plates inside the coincidence plate 5 are unfolded, and then the size of the space between the cooler 3 and the mesh plate 6 is changed.

[0067] The first control member 61 is located outside the cooler 3, and the coincidence plate 5 is located outside the first control member 61.

[0068] Several V-shaped guide plates 13 are installed between the mesh plate 6 and the cooler 3, and the V-shaped guide plates 13 are controlled to rotate through the second control member 131.

[0069] The first control member 61 is a pneumatic rod, and the second control member 131 is a rotating motor.

[0070] When the box-type 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 end of the side of the mesh plate 6 unfolds. The mesh plate 6 and the base plate construct a new heat dissipation space, and 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. Periodically, the V-shaped deflector 13 is rotated into an inverted V shape by controlling the rotating motor, which is beneficial to the reverse flow of air to the surface of the cooler 3 to blow away the dust accumulated at the top of the cooler 3. Subsequently, the V-shaped deflector 13 is rotated into a positive V shape by controlling the rotating motor to normally transfer the blown dust upward. To further improve the dust removal effect, a static dust removal plate and other structures can be installed in the first cavity 101.

[0071] Embodiment 2 As Figure 7 shown, this embodiment provides a box-type screw air compressor. On the basis of Embodiment 1, the following structures are further provided: A deflector assembly 14 for changing the direction of the air flow output by the fan assembly 2 is installed in the deflector cover 4, and the deflector assembly 14 is located above the fan assembly 2.

[0072] One deflector assembly 14 is provided, which makes the direction of the air flow output by the fan assembly 2 be the left-right direction or the front-back direction.

[0073] The deflector assembly 14 includes deflector blades 141, a linkage rod 142, a control rod 143, and a control motor 144. The output end of the control motor 144 is installed with the control rod 143. The control rod 143 is hingedly connected to the linkage rod 142. The linkage rod 142 is hingedly matched with the ends of one side of several deflector blades 141 to adjust the orientation of the deflector blades 141. A rotating rod 1411 is provided at the center of the deflector blades 141.

[0074] The deflector assembly 14 is located above the fan assembly 2. A cooler 3 is provided above the deflector assembly 14, and a mesh plate 6 is provided above the cooler 3. During use, the inclination angle of the deflector blades 141 in the deflector assembly 14 can be controlled to reduce the gap between adjacent deflector blades 141, preventing sundries from entering the air compressor from the open space above the cooler 3 downward in the internal space.

[0075] Taking the guide vane 141 including the first vane 1412 and the second vane 1413 as an example, the first vane 1412 is adjacent to the second vane 1413. After the first vane 1412 and the second vane 1413 are controlled by the linkage rod 142, they present an inclined state. There is an overlapping area between the horizontal projection plane of the downward projection of the first vane 1412 and the horizontal projection plane of the downward projection of the second vane 1413. By adjusting the length of the guide vane 141 and structures such as the control rod 143 and the linkage rod 142, the gap between adjacent guide vanes 141 can be sealed, achieving the purpose of temporarily closing the passage between the fan assembly and the cooler 3. When the fan assembly 2 starts, the upward output air flow can transfer the sundries upward along the air flow.

[0076] Embodiment 3 As Figures 8-9 shown, this embodiment provides a boxed screw air compressor. On the basis of Embodiment 2, the following structures are further provided in this embodiment: A plurality of zigzag air ducts 50 are provided on the outer surface of the overlapping plate 5 facing the first cavity 101.

[0077] 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 is communicated with the straight air duct 502. The adjacent inclined air ducts 501 are communicated to form a turning portion 503. A plurality of electromagnets 504 are installed on the side wall of the turning portion 503. The surface of the zigzag air duct 50 is a smooth surface.

[0078] A collection groove 505 is provided at the lowest point of the zigzag air duct 50. The collection groove 505 is elastically clamped to the surface of the overlapping plate 5.

[0079] The zigzag air duct 50 in this embodiment cooperates with the electromagnets 504 and the collection groove 505 on the air duct to achieve efficient treatment of magnetic impurities in the air flow. The inclination of the guide vane 141 can be controlled by the control motor 144 in the guide assembly 14 to change the air flow direction, facilitating the air flow to blow towards the zigzag air duct 50, so as to specifically clean and collect the magnetic impurities in the air flow, prevent the magnetic impurities from drifting to the vicinity of the air compressor again after being discharged from the air compressor with the heat dissipation air flow, and then enter the air compressor again, reducing the adverse effects caused by the subsequent entry of magnetic impurities into the air compressor, such as being sucked to the air intake filtering structure of the air compressor. Large-particle magnetic impurities may accumulate at the filtering element and cause blockage, and small-particle magnetic impurities may pass through the filtering element and enter the internal core structural components of the air compressor and cause impacts.

[0080] Embodiment 4 As Figures 10-13 shown, this embodiment provides a boxed screw air compressor. On the basis of Embodiment 1, 2, 3 or 4, the following structures are further provided in this embodiment: A protective component 15 that can automatically close is installed at the top of the mesh plate 6. A number of mesh holes 60 are provided on the mesh plate 6. The protective component 15 is installed and attached to the mesh plate 6 through at least two clamping rods 151.

[0081] The protective component 15 includes a frame 152, a flow channel 153, and a closing piece 154. A number of flow channels 153 penetrate through the frame 152 in the vertical direction. The bottom end of the flow channel 153 communicates with the mesh hole 60. A closing piece 154 is installed at the top end of the flow channel 153. The closing piece 154 is installed on the frame 152 through a coil spring 155 and a shaft rod 156.

[0082] The protective component 15 in this embodiment effectively improves the self - closing effect of the fixed meshes on the mesh plate 6, so that when the fan assembly 2 does not start, the heat dissipation channels are indirectly closed for the sundries outside the box - type screw air compressor; when the fan assembly 2 starts, the flow channels 153 in the protective component 15 are opened. Due to the upward flow of air, it is difficult for sundries to enter from the fixed meshes at this time.

[0083] Embodiment 5 This embodiment provides a box - type screw air compressor. The difference between this embodiment and Embodiment 2 is that: Two flow - guiding components 14 are provided, which make the air flow direction output by the fan assembly 2 be the left - right direction and the front - back direction.

[0084] The cooperation of the two flow - guiding components 14 can achieve a more refined air flow guidance. Above, only the preferred embodiments of the present invention are given. Therefore, the scope of implementation of the present invention cannot be limited accordingly. That is, equivalent changes and modifications made according to the scope of the present invention patent and the content of the specification should still fall within the scope covered by the present invention.

Claims

1. A boxed screw air compressor, characterized in that, It includes a box-shaped housing, a fan assembly, a cooler, a deflector hood, overlapping plates, and a mesh plate. The box-shaped housing is prefabricated with a first cavity for installing the cooler. The volume of the first cavity is larger than that of the cooler. The deflector hood is sealed and installed at the bottom end of the first cavity, and the fan assembly is installed at the bottom end of the deflector hood; There are several extendable overlapping plates on the side wall of the first cavity. Each overlapping plate is composed of at least two base plates, and one of the base plates is installed inside the other base plate; the mesh plate is located above the cooler, and the mesh plate is displaced in the vertical direction by a first control member, and the base plates in the overlapping plates unfold, so that the size of the space between the cooler and the mesh plate changes; The first control member is located outside the cooler, and the overlapping plates are located outside the first control member; Several V-shaped deflector plates are installed between the mesh plate and the cooler, and the V-shaped deflector plates are controlled to rotate by a second control member.

2. The boxed screw air compressor according to claim 1, wherein, A deflector assembly for changing the direction of the air flow output by the fan assembly is installed inside the deflector hood, and the deflector assembly is located above the fan assembly.

3. The boxed screw air compressor according to claim 2, wherein One deflector assembly is provided, which makes the direction of the air flow output by the fan assembly be the left-right direction or the front-back direction; or two deflector assemblies are provided, which makes the direction of the air flow output by the fan assembly be the left-right direction and the front-back direction.

4. The boxed screw air compressor according to claim 3, wherein, The deflector assembly includes deflector blades, a linkage rod, a control rod, and a control motor. The output end of the control motor is installed with the control rod, the control rod is hinged to the linkage rod, the linkage rod is hinged to the ends of one side of several deflector blades to cooperate in adjusting the orientation of the deflector blades, and a rotating rod is arranged at the center of the deflector blades.

5. The boxed screw air compressor according to claim 1, wherein, The first control member is a pneumatic rod, and the second control member is a rotating motor.

6. The boxed screw air compressor according to claim 1, wherein, Several zigzag air ducts are provided on the outer surface of the overlapping plates facing the first cavity.

7. The boxed screw air compressor according to claim 6, characterized in that The depth of the zigzag air ducts on the surface of the overlapping plates is at least 1 cm. The zigzag air ducts include inclined air ducts and straight air ducts, and the inclined air ducts are communicated with the straight air ducts. The adjacent inclined air ducts are communicated to form a turning portion. Several electromagnets are installed on the side wall of the turning portion, and the surface of the zigzag air ducts is a smooth surface.

8. The boxed screw air compressor according to claim 7, characterized in that, A collecting groove is provided at the lowest point of the zigzag air ducts, and the collecting groove is elastically clamped to the surface of the overlapping plates.

9. The boxed screw air compressor according to claim 1, wherein, A protective assembly that can be automatically closed is installed at the top end of the mesh plate. Several mesh holes are provided on the mesh plate, and the protective assembly is installed and attached to the mesh plate through at least two clamping rods.

10. The boxed screw air compressor according to claim 9, characterized in that, The protective assembly includes a frame, a circulation channel, and a closing piece. Several circulation channels penetrate through the frame in the vertical direction. The bottom end of the circulation channel is communicated with the mesh holes, and a closing piece is installed at the top end of the circulation channel. The closing piece is installed on the frame through a coil spring and a shaft rod.

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