Multifunctional vacuum pump

Abstract

A multifunctional vacuum pump, comprising a housing (1), wherein a vacuum pump assembly (2) and an oil tank assembly (3) are provided in the housing (1); the vacuum pump assembly (2) comprises an oil pump assembly (4) and an electric motor assembly (21); a condenser (5) is provided below the oil tank assembly (3); an oil intake pipe (11) is provided between the condenser (5) and the oil pump assembly (4); the oil tank assembly (3) comprises an oil tank body (31), which is provided with a discharge port (32), the discharge port (32) being in communication with the oil pump assembly (4); an oil mist filter assembly (6) is provided above the discharge port (32), and comprises an upper protective cover (61), a lower protective cover (62) and a filter member (63); an elastic pressing piece assembly (7) is provided between the discharge port (32) and the upper protective cover (61); a gas ballast assembly (8) is further provided on the housing (1), and comprises a knob (81) and a gas nozzle (82); a gas intake assembly (9) is provided on the housing (1); and a gas output assembly (10) is provided on a side face of the oil tank body (31). By means of the oil mist filter assembly arranged in an oil tank, pumped oil flowing back into the oil tank becomes purer, thereby preventing the generation of a large amount of oil mist in the oil tank; and the gas ballast assembly controls the connection between the oil pump assembly and the outside, such that the ingress of water vapor into the oil tank is reduced, and thus the vacuum pumping efficiency is improved.

Description

Multifunctional vacuum pump Technical Field

[0001] The invention belongs to the technical field of vacuum pumps, and in particular relates to a multifunctional vacuum pump. Background Art

[0002] A vacuum pump is a device used to evacuate a container to create a vacuum. It is widely used in industries such as metallurgy, chemicals, food processing, and electronic coating. Because the container being evacuated is not completely clean, impurities such as water vapor and particulate matter can easily enter the pump body. If these impurities are not removed promptly, the pump's efficiency can be affected. Existing vacuum pumps typically consist of a pump body, an oil tank, and a gas ballast switch. During operation, the pump body draws gas into the pump chamber, which then enters the oil tank. Typically, there is no filtration between the oil tank and the pump chamber, allowing gas and impurities in the pump chamber to enter the oil tank directly, reducing the purity of the oil in the tank and allowing impurities to re-enter the pump chamber. Furthermore, water vapor in the pump chamber that enters the oil tank combines with the oil to produce a large amount of oil mist, affecting vacuum efficiency. Furthermore, impurities can re-enter the pump chamber with the oil, affecting the pump's performance. Existing gas ballast switches introduce dry gas into the pump chamber to prevent water vapor condensation and reduce the amount of oil mist generated in the oil tank. However, these gas ballast switches are complex and have poor reliability. Therefore, it is necessary to design a multifunctional vacuum pump to overcome the above difficulties. Summary of the Invention

[0003] In response to the problems existing in the prior art, the present invention designs a multifunctional vacuum pump. An oil mist filter assembly is arranged in the oil tank of the present invention. Impurities are retained in the protective cover box body through the filter element, so that the pump oil flowing back into the oil tank is purer, thereby avoiding the generation of a large amount of oil mist in the oil tank; at the same time, the conduction state of the oil pump assembly is quickly controlled by the gas ballast assembly, thereby reducing the entry of water vapor and impurities into the oil tank, greatly improving the vacuuming efficiency, and being stable and reliable.

[0004] and a tube connecting the discharging opening of the oil drain plug, wherein the tube has a circulation circulation system and a check valve in it, and the tube which connects the pump to the oil drain plug, and the pump ends connect.

[0005] Preferably, the oil pump assembly includes a pump cover, a primary pump casing, a secondary pump casing, a first end cover and a second end cover; the first end cover is connected to the pump cover, the pump cover is connected to the secondary pump casing, the secondary pump casing is connected to the primary pump casing, the primary pump casing is connected to the second end cover, and the second end cover is connected to the motor assembly; a long rotor and long blades arranged in pairs are provided in the primary pump casing, and a short rotor and short blades arranged in pairs are provided in the secondary pump casing; an oil pump rotor is provided on the short rotor, which rotates synchronously with the short rotor, and the long rotor rotates synchronously with the motor assembly; a first spring is provided between the two long blades, and a second spring is provided between the two short blades; the secondary pump casing is communicated with the oil tank body, and a first channel connecting the secondary pump casing and the oil inlet pipe is provided in the oil tank body; the secondary pump casing is communicated with the gas ballast assembly, and the second end cover is communicated with the intake assembly.

[0006] The intake assembly is connected to the container to be vacuumed. When the power switch is turned on, the motor assembly activates, simultaneously driving the long rotor to rotate. This rotation of the long rotor drives the short rotor, which in turn drives the oil pump rotor to rotate synchronously. This causes the long vanes to rotate within the primary pump housing, and the short vanes to rotate within the secondary pump housing. Gas first enters the primary pump housing through the second end cap, where the long vanes continuously rotate and compress the gas within. The gas then enters the secondary pump housing, where the short vanes continuously rotate and compress the gas within. From the secondary pump housing, the gas and pump oil pass through the discharge port and enter the fuel tank body. The gas and pump oil are then filtered by the oil mist filter assembly, re-entering the fuel tank body cavity before being filtered and discharged to the outside through the exhaust assembly. This secondary compression of the oil pump assembly enhances vacuum efficiency. Pump oil is introduced into the oil pump assembly to provide a seal, ensuring a more secure seal and a more reliable vacuuming process. The gas ballast assembly also reduces the generation of oil mist and its intrusion into the fuel tank body.

[0007] and a tube connecting the discharging opening of the fuel tank with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the fuel tank to the fuel tank, and said former tube which connects the fuel tank to the fuel tank is cooled.

[0008] An oil cover prevents oil spillage when the tank body is shaken. The placement slot is transparent and extends into the tank body, facilitating installation of the indicator circuit board without taking up space. A transparent sight glass facilitates monitoring the oil level within the tank body and the status of the indicator lights on the indicator circuit board. The indicator circuit board is electrically connected to the gas ballast assembly, which in turn is electrically connected to the main control circuit board. This allows the user to intuitively identify the gas ballast status by flashing red and blue when the gas ballast assembly is on and blue when it is off. An elastic pressure plate assembly is installed at the discharge port. Compressed gas within the secondary pump housing impacts the elastic pressure plate assembly, whereupon the gas and pump oil are first filtered by the oil mist filter assembly, preventing impurities in the gas from directly entering the tank body. A condenser is located beneath the tank body to cool the pump oil before re-entering the pump assembly. This allows the oil to circulate and cool during use, ensuring long-term operation. An air outlet component is also provided on the outer wall of the fuel tank body, through which the gas is filtered again, so that the gas discharged to the outside is purer and the user experience is better.

[0009] Preferably, the gas ballast assembly includes a knob, a gas nozzle, a gas ballast connecting rod, a copper contact, a gas ballast circuit board, a gas ballast plug sleeve, a gas ballast plug and a gas ballast shell; the gas ballast connecting rod and the knob are respectively mounted on both sides of the shell; a mounting groove for mounting the gas ballast connecting rod is provided in the shell, and the gas ballast connecting rod is connected to the gas ballast plug sleeve and rotates synchronously; a gas ballast plug is provided in the gas ballast plug sleeve and rotates synchronously therewith, and the gas ballast plug is sleeved and mounted on the gas nozzle; the gas ballast shell is sleeved and mounted on the outer layer of the gas ballast plug sleeve, and the gas ballast plug sleeve can rotate relative to the gas ballast shell; the gas ballast circuit board is arranged on A first fastener is provided between the starting end of the gas ballast housing and the mounting groove; the copper contact is installed on the gas ballast connecting rod and rotates synchronously with the gas ballast, and the contact point on the copper contact is arranged toward the contact point on the gas ballast circuit board; a first vent hole is provided on the gas ballast plug sleeve, a second vent hole is provided on the gas ballast plug, and a third vent hole is provided on the gas nozzle; the gas ballast circuit board is electrically connected to the indicator light circuit board, and the gas ballast circuit board is also electrically connected to the main control circuit board; a vent groove is provided on the gas ballast housing, and the vent groove is arranged along the axial direction of the gas ballast housing.

[0010] By default, the third vent hole on the gas nozzle is offset from the first vent hole on the gas ballast sleeve, preventing the gas nozzle from being connected to the outside atmosphere and keeping the gas ballast assembly closed. When the knob is turned, the gas ballast connecting rod rotates synchronously, which in turn drives the gas ballast sleeve, which in turn drives the gas ballast plug. This aligns the first and third vent holes, connecting the gas nozzle to the vent groove. Dry air from the outside can then flow into the secondary pump housing through the vent groove. During the oil pump assembly's evacuation process, the gas ballast assembly is opened, connecting the gas nozzle to the hole in the secondary pump housing. This continuous compression of air generates water vapor within the secondary pump housing. Dry air is introduced into the secondary pump housing through the gas ballast assembly, preventing condensation. This air then enters the oil mist filter along with the pump oil, reducing the water vapor content and preventing the generation of excessive oil mist that can affect vacuum efficiency. This reduced oil mist dilutes the vapor pressure and increases the life of the vacuum pump assembly. The gas ballast connecting rod is equipped with a copper contact that rotates synchronously with it. Rotating the gas ballast connecting rod causes the contact points on the copper contact to rotate synchronously. Because the gas ballast circuit board has multiple pairs of contacts, this generates different electrical signals, causing the indicator circuit board to display different states. When the gas ballast assembly is in the open state, the indicator light on the indicator circuit board flashes red and blue; when the gas ballast assembly is in the closed state, the indicator light flashes blue. This allows the user to directly determine the on / off status of the gas ballast assembly by observing the indicator light. Because the timing of opening the gas ballast assembly is crucial, users can open the gas ballast assembly according to their needs.

[0011] Preferably, the gas ballast connecting rod is provided with a cylindrical through hole, and a pair of positioning plugs are provided in the cylindrical through hole, and the end of each positioning plug is provided with a limiting bead that is synchronously extended and retracted therewith, and a compression spring is provided between the two positioning plugs; a plurality of evenly distributed limiting grooves are provided on the inner wall of the mounting groove, and the outer contour of each limiting groove matches the outer contour of the limiting bead; the first fastener passes through the gas ballast shell and the gas ballast circuit board in sequence and extends to be installed in the mounting groove; the first vent and the second vent are installed coaxially, and the third vent is arranged opposite the vent groove, when the first vent and the third vent are aligned, the gas ballast assembly is in a conducting state, and when the first vent and the third vent are misaligned, the gas ballast assembly is in a closed state; a first pipeline connecting the gas nozzle and the secondary pump housing is provided between the two, and a retaining ring for fastening is provided on the outer side of the gas nozzle.

[0012] By providing a limit bead, a positioning plunger, and a compression spring, the position of the knob can be stably maintained, so that the gas ballast assembly can be stably maintained in the corresponding gear position; when the gas ballast assembly is in the open or closed gear position, the limit bead is stuck in the limit groove; when the gear position needs to be switched, the knob is turned, the limit bead is disengaged from the limit groove, and the compression spring is further compressed; when the gear position is switched to the corresponding gear, the compression spring pushes the limit bead to automatically snap into the limit groove. In the default state, the first vent hole and the second vent hole are coaxially arranged, the third vent hole is aligned with the vent groove, and the first vent hole and the third vent hole are offset. In this way, the air nozzle is in a closed state, and the outside atmosphere cannot enter the chamber of the oil pump assembly; turning the knob to align the first vent hole with the third vent hole, so that the gas will enter the vent groove through the gap in the gas ballast housing, then enter the air nozzle along the vent groove, and finally enter the chamber of the secondary pump housing from the first pipeline.

[0013] Preferably, the oil mist filter assembly also includes a second fastener and a third fastener; a lower protective cover is provided at the horizontal bottom of the oil tank body, and an upper protective cover covering the lower protective cover is provided on the lower protective cover; the lower protective cover is adjacent to the elastic pressing plate assembly, and the upper protective cover, the lower protective cover and the horizontal bottom of the oil tank body surround a accommodating space, and the elastic pressing plate assembly is arranged in the accommodating space; a second fastener for fixing the upper and lower protective covers is provided between the upper and lower protective covers, and a third fastener for fixing the upper and lower protective covers is provided between the upper and tank body; an oil outlet is provided on the lower protective cover, and a cross-arranged baffle is provided on the oil outlet, and a filter is provided on the baffle; the outer contour of the filter matches the outer contour of the oil outlet, and the filter fits the inner wall of the oil outlet.

[0014] The upper and lower covers, along with the horizontal bottom of the tank body, enclose a containment space. Gas and oil exiting the secondary pump housing first enter the containment space and are then filtered by a filter element. Impurities in the gas remain within the containment space, where the oil mist is separated by the filter element, resulting in a purer gas. The oil and gas then return to the tank body through the oil outlet. Because the upper and lower covers are removable, the oil outlet of the lower cover is positioned lower than the drain port. Impurities are retained by the filter element in the lower cover, facilitating subsequent maintenance and replacement. The oil mist filter assembly significantly reduces oil mist within the tank body, preventing water vapor from returning to the pump assembly along the oil inlet pipe, significantly improving vacuum efficiency.

[0015] Preferably, the elastic pressing plate assembly includes a screw, a flat washer, a spring washer, a diaphragm and a pressing plate body; the diaphragm is placed at the discharge port, the pressing plate body is installed on the diaphragm, the screw passes through the pressing plate body and the diaphragm in sequence, and extends to be installed in the oil tank body; a flat washer and a spring washer are provided on the screw, and the flat washer and the pressing plate body are arranged adjacent to each other.

[0016] The elastic pressure plate assembly is installed at the discharge port and is surrounded by upper and lower protective covers. This allows for pre-filtering of gas and pump oil, preventing impurities from contaminating the pump oil within the tank body. The pressure plate body is elastic, and the diaphragm rests against the top of the discharge port. Compressed gas impacts the pressure plate body, keeping the discharge port open. Flat washers and spring washers are installed on the screws to enhance the pressure plate body's installation stability and ensure long-term operation.

[0017] Preferably, a condenser is provided directly below the oil tank body; the condenser includes several vertically arranged condensation channels, and the ends of the condensation channels are provided with horizontal channels for communication; the outer layer of the condensation channel is provided with several evenly distributed heat sinks; an oil inlet pipe is provided in the condensation channel in the middle of the condenser, and a protective pad is provided between the oil inlet pipe and the inner wall of the condensation channel; one end of the oil inlet pipe is provided at the bottom of the condensation channel, and the other end of the oil inlet pipe is inserted into the first channel of the oil tank body; a filter barrel is provided at the bottom of the oil inlet pipe, and the filter barrel is tightly fitted with the oil inlet pipe; a partition is provided on the side of the oil tank body, and an air outlet assembly is provided on the open end of the partition; the air outlet assembly includes a spiral joint, a sealing ring, a filter plate and an exhaust nut; the spiral joint is threadedly connected to the open end of the partition, and the exhaust nut is threadedly connected to the spiral joint; a slot for installing a sealing ring is provided on the outer wall of the spiral joint, and the sealing ring is tightly fitted with the slot; a filter plate is provided between the end of the spiral joint and the mesh of the exhaust nut, and the filter plate and the mesh of the exhaust nut fit together.

[0018] Multiple condensation channels facilitate cooling of the pump oil. Heat sinks on the outer layers of the condensation channels significantly increase the heat dissipation area for improved cooling. Protective pads are placed within the condensation channels to secure the oil inlet pipe. A filter barrel is installed at the inlet end of the pipe to filter the oil entering the pump assembly from the tank body, ensuring greater purity of the oil entering the secondary pump housing. This makes the pump assembly more reliable and safe, and increases vacuum efficiency. An exhaust assembly facilitates filtering of the exhaust gas. The end face of the exhaust nut is perforated, and a filter is placed between the exhaust nut and the screw joint, ensuring that gas is discharged in one direction, out of the tank body. A divider prevents direct oil spillage.

[0019] Preferably, the oil pump assembly further includes a first seal, a second seal, a third seal and a fourth seal; the first seal is arranged between the first end cover and the pump cover, the second seal is arranged between the pump cover and the secondary pump casing, the third seal is arranged between the secondary pump casing and the primary pump casing, and the fourth seal is arranged between the primary pump casing and the second end cover; the oil pump rotor is mounted in the end groove of the short rotor, and the axial length of the long blade is greater than the axial length of the short blade; the long blade is provided with a first guide groove for installing a first spring, and the short blade is provided with a second guide groove for installing a second spring; the long blade is mounted on the long rotor and abuts against the inner wall of the primary pump casing, and the short blade is mounted on the short rotor and abuts against the inner wall of the secondary pump casing; the top of the secondary pump casing is provided with a second channel connected to the oil tank body, and the second channel is coaxially arranged with the discharge port; the end of the motor assembly facing away from the oil pump assembly is provided with a fan blade that rotates synchronously with it, and the bottom of the outer casing is provided with a heat sink.

[0020] By providing a first seal, a second seal, a third seal, and a fourth seal, the oil pump assembly achieves improved sealing. The first guide groove facilitates the installation of the first spring, allowing the long blade to cling tightly to the inner wall of the primary pump housing. The second guide groove facilitates the installation of the second spring, allowing the short blade to cling tightly to the inner wall of the secondary pump housing. The fan blades, facing the condenser and operating synchronously with the condenser, provide enhanced heat dissipation for the vacuum pump assembly. A heat sink is also provided at the bottom of the housing, located below the vacuum pump assembly, further enhancing heat dissipation.

[0021] Preferably, the air intake assembly includes an air intake connector, which is provided with air intake ports of different calibers; each of the air intake ports is provided with a threaded protective sleeve, and each of the air intake ports is also provided with a fifth seal corresponding to its caliber; an air intake cover plate is provided between the air intake connector and the outer shell to fix the two, and a bending tube is provided between the air intake connector and the second end cover to connect the two, and an anti-backflow ball is provided at the end of the bending tube facing the second end cover.

[0022] By setting air inlets of different calibers, it is convenient to connect with pipes of different thicknesses; by setting a threaded protective sleeve, impurities are prevented from falling into the air inlet; an anti-backflow ball is set in the bent pipe. When the motor component of the vacuum pump assembly stops working, the pressure in the external container is often small. The anti-backflow ball blocks the bent pipe to prevent the pump oil from flowing back into the external container.

[0023] Compared to existing technologies, the present invention offers the following advantages: An oil mist filter assembly is installed within the fuel tank body to filter the gas and pump oil exiting the oil pump assembly, preventing impurities in the gas from entering the tank body and contaminating the pump oil. The filter element within the oil mist filter assembly separates the oil mist, preventing the tank body from generating large amounts of oil mist and reducing the backflow of water vapor into the pump assembly. A knob on the gas ballast assembly allows for convenient control of the gas ballast assembly's opening and closing. When the gas ballast assembly is on, dry air from the outside enters the pump assembly, preventing large amounts of gas condensation, reducing the water vapor content in the gas, and preventing the generation of large amounts of oil mist within the tank body. Furthermore, the gas is further filtered by the gas outlet assembly, resulting in a cleaner, more environmentally friendly exhaust gas. Furthermore, a sight glass on the side of the fuel tank body allows direct viewing of the operating status of the indicator circuit board, providing constant visibility of the gas ballast assembly's status, making it convenient and safe to use. Because the fuel tank body is externally located, the motor assembly and pump oil are isolated from each other, preventing heat from rising oil temperatures from being transferred to the motor assembly, effectively extending the operating life of the equipment. The combination of the fan blades and condenser keeps the vacuum pump assembly running at a constant low temperature, effectively controlling the pump oil temperature and thus increasing the equipment's operating time. In summary, the interaction between the oil mist filtration assembly and the gas ballast assembly can significantly reduce the generation of oil mist, improve the product's vacuum efficiency, and prolong the equipment's operating time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a perspective view of the present invention;

[0025] FIG2 is a perspective view of a housing with a hidden portion according to the present invention;

[0026] Figure 3 is a diagram of the internal structure of the invention;

[0027] FIG4 is a perspective view of the oil tank assembly and the condenser when assembled;

[0028] FIG5 is an exploded view of the fuel tank assembly and the condenser in FIG4 ;

[0029] FIG6 is a partial enlarged view of position A in FIG5 ;

[0030] FIG7 is a perspective view of the vacuum pump assembly;

[0031] FIG8 is an exploded view of the vacuum pump assembly;

[0032] FIG9 is a perspective view of the gas ballast assembly;

[0033] Figure 10 is an exploded view of the gas ballast assembly;

[0034] Figure 11 is a diagram of the internal structure of the gas ballast assembly;

[0035] FIG12 is a diagram showing the internal structure of the housing;

[0036] FIG13 is an exploded view of the air intake assembly;

[0037] Figure 14 is a diagram showing the internal structure of the fuel tank body;

[0038] FIG15 is a top view of the lower protective cover.

[0039] Markings in the figure: 1. Housing; 2. Vacuum pump assembly; 21. Motor assembly; 3. Oil tank assembly; 31. Oil tank body; 32. Discharge port; 33. First channel; 34. Oil-proof cover; 35. Oil tank screw cap; 36. Placement slot; 37. Mounting hole; 38. Partition; 4. Oil pump assembly; 41. Pump cover; 42. Primary pump housing; 43. Secondary pump housing; 44. First end cover; 45. Second end cover; 46. Long rotor; 47. Long blades; 48. Short rotor; 49. Short blades; 410. Oil pump rotor; 411. First spring; 412. Second spring Spring; 413, first seal; 414, second seal; 415, third seal; 416, fourth seal; 417, first guide groove; 418, second guide groove; 419, second channel; 5, condenser; 51, condensation channel; 52, horizontal channel; 53, heat sink; 54, protective pad; 6, oil mist filter assembly; 61, upper protective cover; 62, lower protective cover; 63, filter element; 64, second fastener; 65, third fastener; 66, oil outlet; 67, stop bar; 7, elastic pressing piece assembly; 71, screw; 72, flat washer; 73 , spring washer; 74, diaphragm; 75, pressing plate body; 8, gas ballast assembly; 81, knob; 82, gas nozzle; 83, gas ballast connecting rod; 84, copper contact; 85, gas ballast circuit board; 86, gas ballast plug sleeve; 87, gas ballast plug; 88, gas ballast shell; 89, first vent hole; 810, second vent hole; 811, third vent hole; 812, vent groove; 813, columnar through hole; 814, positioning plug; 815, limit bead; 816, compression spring; 817, retaining spring; 818, first pipeline; 9, air inlet assembly; 91, air inlet connector; 9 2. Air inlet; 93. Threaded protective sleeve; 94. Fifth sealing member; 95. Air inlet cover; 96. Bend pipe; 97. Anti-backflow ball; 10. Air outlet assembly; 101. Spiral joint; 102. Sealing ring; 103. Filter; 104. Exhaust port nut; 105. Slot; 11. Oil inlet pipe; 111. Filter barrel; 12. Indicator circuit board; 13. Main control circuit board; 14. Sight glass; 15. Fixed pressure plate; 16. Sealing strip; 17. Mounting slot; 18. First fastener; 19. Limiting slot; 20. Fan blade; 23. Heat sink. DETAILED DESCRIPTION

[0040] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0041] As shown in Figures 1 to 15, this embodiment discloses a multifunctional vacuum pump, including a housing 1, a vacuum pump assembly 2 and an oil tank assembly 3 are provided in the housing 1, the vacuum pump assembly 2 includes an oil pump assembly 4 and a motor assembly 21, a condenser 5 is provided below the oil tank assembly 3 and is connected to the condenser 5, and an oil inlet pipe 11 is provided between the condenser 5 and the oil pump assembly 4 to connect the two; the oil tank assembly 3 includes an oil tank body 31, and the oil tank body 31 is provided with a discharge port 32, and the discharge port 32 is connected to the oil pump assembly 4; an oil mist filter assembly 6 is provided above the discharge port 32. The oil mist filter assembly 6 includes an upper protective cover 61, a lower protective cover 62 and a filter element 63; an elastic pressing piece assembly 7 for controlling the opening or closing of the discharge port 32 is provided between the discharge port 32 and the upper protective cover 61; the housing 1 is also provided with a gas ballast assembly 8 connected to the oil pump assembly 4, the gas ballast assembly 8 includes a knob 81 and an air nozzle 82, and when the knob 81 is rotated relative to the housing 1, the air nozzle 82 is in an open or closed state; the housing 1 is provided with an air inlet assembly 9 connected to the oil pump assembly 4, and an air outlet assembly 10 is provided on the side of the oil tank body 31.

[0042] The oil pump assembly 4 includes a pump cover 41, a primary pump housing 42, a secondary pump housing 43, a first end cover 44 and a second end cover 45; the first end cover 44 is connected to the pump cover 41, the pump cover 41 is connected to the secondary pump housing 43, the secondary pump housing 43 is connected to the primary pump housing 42, the primary pump housing 42 is connected to the second end cover 45, and the second end cover 45 is connected to the motor assembly 21; a long rotor 46 and paired long blades 47 are provided in the primary pump housing 42, a short rotor 48 and paired short blades 49 are provided in the secondary pump housing 43; the short rotor 48 An oil pump rotor 410 is provided on it and rotates synchronously with it, the short rotor 48 and the long rotor 46 rotate synchronously, and the long rotor 46 rotates synchronously with the motor assembly 21; a first spring 411 is provided between the two long blades 47, and a second spring 412 is provided between the two short blades 49; the secondary pump housing 43 is connected to the oil tank body 31, and a first channel 33 connecting the secondary pump housing 43 and the oil inlet pipe 11 is provided in the oil tank body 31; the secondary pump housing 43 is connected to the gas ballast assembly 8, and the second end cover 45 is connected to the air intake assembly 9. A fuel tank assembly 3 is provided above the fuel pump assembly 4, and the fuel tank assembly 3 also includes an oil-proof cover 34 and a fuel tank screw cover 35; the oil-proof cover 34 is provided at the open end of the fuel tank body 31, and the fuel tank screw cover 35 is threadedly connected to the fuel tank body 31; a vertically extending placement groove 36 is provided on the end cover of the fuel tank body 31, and an indicator circuit board 12 is provided in the placement groove 36; a main control circuit board 13 is provided below the fuel pump assembly 4, and the indicator circuit board 12 is electrically connected to the gas ballast assembly 8, and the gas ballast assembly 8 is electrically connected to the main control circuit board 13; the cavity of the fuel tank body 31 A discharge port 32 is provided in parallel inside, an elastic pressing plate assembly 7 is provided on the discharge port 32, and an oil mist filter assembly 6 is provided above the elastic pressing plate assembly 7 and is fitted with the tank body 31; a plurality of evenly distributed mounting holes 37 are provided at the bottom of the tank body 31, and a condenser 5 is provided below the mounting holes 37; a sight glass 14 is provided on the end face of the tank body 31 facing the placement groove 36, and a fixed pressing plate 15 connected to the tank body 31 is provided on the outside of the sight glass 14, and a sealing strip 16 is provided between the sight glass 14 and the tank body 31; an air outlet assembly 10 is also provided on the outer wall of the tank body 31.

[0043] The gas ballast assembly 8 includes a knob 81, a gas nozzle 82, a gas ballast connecting rod 83, a copper contact 84, a gas ballast circuit board 85, a gas ballast plug sleeve 86, a gas ballast plug 87 and a gas ballast shell 88; the gas ballast connecting rod 83 and the knob 81 are respectively mounted on both sides of the shell 1; a mounting groove 17 for mounting the gas ballast connecting rod 83 is provided in the shell 1, and the gas ballast connecting rod 83 is connected to the gas ballast plug sleeve 86 and rotates synchronously; a gas ballast plug 87 is provided in the gas ballast plug sleeve 86 and rotates synchronously therewith, and the gas ballast plug 87 is sleeved and mounted on the gas nozzle 82; the gas ballast shell 88 is sleeved and mounted on the outer layer of the gas ballast plug sleeve 86, and the gas ballast plug sleeve 86 can rotate relative to the gas ballast shell 88; the gas ballast circuit board 85 is arranged on the gas ballast shell A first fastener 18 is provided between the leading end of the body 88 and the mounting groove 17, and between the gas ballast housing 88 and the mounting groove 17; the copper contact 84 is mounted on the gas ballast connecting rod 83 and rotates synchronously therewith, and the contact point on the copper contact 84 is arranged toward the contact point on the gas ballast circuit board 85; the gas ballast plug sleeve 86 is provided with a first vent hole 89, the gas ballast plug 87 is provided with a second vent hole 810, and the gas nozzle 82 is provided with a third vent hole 811; the gas ballast circuit board 85 is electrically connected to the indicator circuit board 12, and the gas ballast circuit board 85 is also electrically connected to the main control circuit board 13; the gas ballast housing 88 is provided with a vent groove 812, and the vent groove 812 is arranged along the axial direction of the gas ballast housing 88. The gas ballast connecting rod 83 is provided with a cylindrical through hole 813, and a pair of positioning plugs 814 are provided in the cylindrical through hole 813. The end of each positioning plug 814 is provided with a limiting bead 815 that is synchronously extended and retracted therewith, and a compression spring 816 is provided between the two positioning plugs 814; the inner wall of the mounting groove 17 is provided with a plurality of evenly distributed limiting grooves 19, and the outer contour of each limiting groove 19 matches the outer contour of the limiting bead 815; the first fastener 18 passes through the gas ballast housing 88 and the gas ballast circuit board 85 in sequence. , and extends to be installed on the mounting groove 17; the first vent hole 89 and the second vent hole 810 are installed coaxially, and the third vent hole 811 is arranged opposite to the vent groove 812. When the first vent hole 89 and the third vent hole 811 are aligned, the gas ballast assembly 8 is in a conducting state; when the first vent hole 89 and the third vent hole 811 are misaligned, the gas ballast assembly 8 is in a closed state; a first pipeline 818 connecting the gas nozzle 82 and the secondary pump housing 43 is provided between the two, and a retaining spring 817 for fastening is provided on the outside of the gas nozzle 82.

[0044] The oil mist filter assembly 6 also includes a second fastener 64 and a third fastener 65; a lower protective cover 62 is provided at the horizontal bottom of the oil tank body 31, and an upper protective cover 61 covering it is provided on the lower protective cover 62; the lower protective cover 62 is adjacent to the elastic pressing piece assembly 7, and the upper protective cover 61, the lower protective cover 62 and the horizontal bottom of the oil tank body 31 surround and form an accommodating space, and the elastic pressing piece assembly 7 is arranged in the accommodating space; a second fastener 64 is provided between the upper protective cover 61 and the lower protective cover 62 to fix the two, and a third fastener 65 is provided between the upper protective cover 61 and the oil tank body 31 to fix the two; an oil outlet 66 is provided on the lower protective cover 62, and a cross-arranged baffle 67 is provided on the oil outlet 66, and a filter element 63 is provided on the baffle 67; the outer contour of the filter element 63 matches the outer contour of the oil outlet 66, and the filter element 63 fits into the inner wall of the oil outlet 66. The elastic pressing piece assembly 7 includes a screw 71, a flat washer 72, a spring washer 73, a diaphragm 74 and a pressing piece body 75; the diaphragm 74 is placed on the discharge port 32, and the pressing piece body 75 is installed on the diaphragm 74. The screw 71 passes through the pressing piece body 75 and the diaphragm 74 in sequence and extends to be installed in the oil tank body 31; a flat washer 72 and a spring washer 73 are provided on the screw 71, and the flat washer 72 and the pressing piece body 75 are arranged adjacent to each other.

[0045] A condenser 5 is provided directly below the fuel tank body 31. The condenser 5 includes a plurality of vertically arranged condensation channels 51, with a horizontal channel 52 at the end thereof for communication. The outer layer of the condensation channels 51 is provided with a plurality of evenly distributed heat sinks 53. An oil inlet pipe 11 is provided in the condensation channel 51 in the middle of the condenser 5, and a protective pad 54 is provided between the oil inlet pipe 11 and the inner wall of the condensation channel 51. One end of the oil inlet pipe 11 is provided at the bottom of the condensation channel 51, and the other end of the oil inlet pipe 11 is inserted into the first channel 33 of the fuel tank body 31. A filter barrel 111 is provided at the bottom of the oil inlet pipe 11, which is tightly connected to the oil inlet pipe 11. A partition 38 is provided on the side of the oil tank body 31, and an air outlet assembly 10 is provided on the open end of the partition 38; the air outlet assembly 10 includes a spiral joint 101, a sealing ring 102, a filter 103 and an exhaust port nut 104; the spiral joint 101 is threadedly connected to the open end of the partition 38, and the exhaust port nut 104 is threadedly connected to the spiral joint 101; a groove 105 for installing the sealing ring 102 is provided on the outer wall of the spiral joint 101, and the sealing ring 102 is tightly fitted with the groove 105; a filter 103 is provided between the end of the spiral joint 101 and the mesh of the exhaust port nut 104, and the filter 103 and the mesh of the exhaust port nut 104 fit each other. The oil pump assembly 4 also includes a first seal 413, a second seal 414, a third seal 415 and a fourth seal 416; the first seal 413 is arranged between the first end cover 44 and the pump cover 41, the second seal 414 is arranged between the pump cover 41 and the secondary pump housing 43, the third seal 415 is arranged between the secondary pump housing 43 and the primary pump housing 42, and the fourth seal 416 is arranged between the primary pump housing 42 and the second end cover 45; the oil pump rotor 410 is installed in the end groove of the short rotor 48, the axial length of the long blade 47 is greater than the axial length of the short blade 49; the long blade 47 is provided with A first guide groove 417 is used to install a first spring 411, and a second guide groove 418 is provided on the short blade 49 for installing a second spring 412; the long blade 47 is installed on the long rotor 46 and abuts against the inner wall of the first-stage pump casing 42, and the short blade 49 is installed on the short rotor 48 and abuts against the inner wall of the second-stage pump casing 43; the top of the second-stage pump casing 43 is provided with a second channel 419 connected to the oil tank body 31, and the second channel 419 is coaxially arranged with the discharge port 32; the end of the motor assembly 21 facing away from the oil pump assembly 4 is provided with a fan blade 20 that rotates synchronously with it, and the bottom of the outer casing 1 is provided with a heat dissipation plate 23.The air intake assembly 9 includes an air intake connector 91, which is provided with air intake ports 92 of different calibers; each of the air intake ports 92 is provided with a threaded protective sleeve 93, and each of the air intake ports 92 is also provided with a fifth sealing member 94 corresponding to its caliber; an air intake cover plate 95 is provided between the air intake connector 91 and the outer shell 1 to fix the two, and a bent tube 96 is provided between the air intake connector 91 and the second end cover 45 to connect the two, and an anti-backflow ball 97 is provided at the end of the bent tube 96 facing the second end cover 45.

[0046] The specific operation process of this embodiment is as follows: when vacuuming is required, the container is connected to the air inlet 92 of the air inlet assembly 9 through an external pipeline; then the power switch is turned on, the motor assembly 21 works to drive the long rotor 46 to rotate, and when the long rotor 46 rotates, it drives the short rotor 48 to rotate, and the rotation of the short rotor 48 drives the oil pump rotor 410 to rotate synchronously; in this way, the long blades 47 will rotate in the primary pump housing 42, and the short blades 49 will rotate in the secondary pump housing 43; the gas will first enter the primary pump housing 42 through the second end cover 45, and when the long blades 47 continue to rotate, they will first compress the gas in the primary pump housing 42; then the gas will enter the secondary pump housing 43, and when the short blades 49 continue to rotate, they will first compress the gas in the secondary pump housing 43. The gas then enters the oil tank body 31 along the discharge port 32 from the secondary pump housing 43, and the gas and pump oil are then filtered by the oil mist filter assembly 6. The upper protective cover 61, the lower protective cover 62, and the horizontal bottom of the oil tank body 31 enclose a storage space. Gas and pump oil exiting the secondary pump housing 43 first enter the storage space and are then filtered by the filter element 63. Impurities in the gas remain in the storage space, and the oil mist is separated by the filter element 63, making the gas purer. The pump oil and gas then return to the chamber of the oil tank body 31 through the oil outlet 66. Because the upper protective cover 61 and the lower protective cover 62 are removable, the oil outlet 66 of the lower protective cover 62 is positioned lower than the exhaust port 32. Impurities are then retained on the filter element 63 of the lower protective cover 62, facilitating subsequent maintenance and replacement. The provision of the oil mist filter assembly 6 significantly reduces oil mist within the oil tank body 31, preventing water vapor from returning to the oil pump assembly 4 along the oil inlet pipe 11, and significantly improving vacuum efficiency. The condenser 5 circulates and cools the pump oil. A protective pad 54 is provided within the condensation channel 51 to facilitate securing the oil inlet pipe 11. A filter barrel 111 is installed at the oil inlet end of the oil inlet pipe 11. This filters the pump oil entering the oil pump assembly 4 from the tank body 31, thereby ensuring that the pump oil entering the secondary pump housing 43 has higher purity, making the oil pump assembly more reliable and safe, and achieving higher vacuum efficiency. Here, the pump oil re-enters the secondary pump housing 43 through the oil inlet pipe 11, and then circulates within the tank body 31 and the oil pump assembly 4.

[0047] Gas and pump oil impact the elastic pressure plate assembly 7, thus opening the discharge port 32. The gas then passes through the oil mist filter assembly 6 and enters the chamber of the oil tank body 31 before being discharged to the outside. The gas outlet assembly 10 facilitates filtering of the discharged gas. The end surface of the exhaust nut 104 is provided with a mesh, and a filter 103 is installed between the exhaust nut 104 and the screw joint 101. This allows gas to be discharged in one direction only, from the inside of the oil tank body 31 to the outside. The partition 38 prevents direct spillage of the pump oil.

[0048] Through the sight glass 14, it can be observed whether the oil tank body 31 has produced a large amount of oil mist; when there is a lot of oil mist, by opening the gas ballast assembly 8, dry air from the outside is allowed to enter the oil pump assembly 4, thereby reducing the generation of oil mist. In the default state, the third vent hole 811 on the gas nozzle 82 is offset from the first vent hole 89 on the gas ballast plug sleeve 86, so that the gas nozzle 82 is not connected to the outside atmosphere, and the gas ballast assembly 8 is in a closed state; when the knob 81 is turned, the gas ballast connecting rod 83 rotates synchronously, and when the gas ballast connecting rod 83 rotates, it drives the gas ballast plug sleeve 86 to rotate, and when the gas ballast plug sleeve 86 rotates, it drives the gas ballast plug 87 to rotate, so that the first vent hole 89 and the third vent hole 811 are aligned, the gas nozzle 82 is connected to the ventilation groove 812, and then the dry air from the outside is discharged. Gas can flow along the vent groove 812 into the chamber of the secondary pump housing 43. During the evacuation process of the oil pump assembly 4, the gas ballast assembly 8 is opened, and the hole in the secondary pump housing 43 is connected to the gas nozzle 82. The continuous compression of gas will generate water vapor in the chamber of the secondary pump housing 43. Dry gas is introduced into the secondary pump housing 43 through the gas ballast assembly 8 to prevent large amounts of gas condensation. The gas then enters the oil mist filter assembly 6 along with the pump oil, reducing the water vapor content in the gas and preventing the generation of large amounts of oil mist that affects the vacuuming efficiency. The reduction of oil mist dilutes the vapor pressure, thereby extending the service life of the vacuum pump assembly. The gas ballast connecting rod 83 is provided with a copper contact piece 84 that rotates synchronously with it. When the gas ballast connecting rod 83 is rotated, the contacts on the copper contact piece 84 rotate synchronously. Since the gas ballast circuit board 85 is provided with multiple pairs of contacts, the gas ballast circuit board 85 generates different electrical signals, thereby causing the indicator circuit board 12 to display different states. When the gas ballast assembly 8 is in the open state, the indicator light on the indicator circuit board 12 flashes red and blue; when the gas ballast assembly 8 is in the closed state, the indicator light is blue. In this way, the user can intuitively understand the on / off state of the gas ballast assembly 8 by observing the state of the indicator light.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A multifunctional vacuum pump, comprising a housing (1), a vacuum pump assembly (2) and an oil tank assembly (3) being arranged in the housing (1), characterized in that: The vacuum pump assembly (2) includes an oil pump assembly (4) and a motor assembly (21); a condenser (5) is provided below the oil tank assembly (3) and is in communication with the oil tank assembly (4); an oil inlet pipe (11) is provided between the condenser (5) and the oil pump assembly (4) to connect the two; the oil tank assembly (3) includes an oil tank body (31); a discharge port (32) is provided on the oil tank body (31); the discharge port (32) is in communication with the oil pump assembly (4); an oil mist filter assembly (6) is provided above the discharge port (32); the oil mist filter assembly (6) includes an upper protective cover (61), a lower protective cover (62) and a filter element (63); an elastic pressing piece assembly (7) for controlling the discharge port (32) to be opened or closed is provided between the discharge port (32) and the upper protective cover (61); a gas ballast assembly (8) in communication with the oil pump assembly (4) is further provided on the housing (1); the gas ballast assembly (8) comprises a knob (81) and an air nozzle (82); when the knob (81) is rotated relative to the housing (1), the air nozzle (82) is in an open or closed state; an air inlet assembly (9) in communication with the oil pump assembly (4) is provided on the housing (1); and an air outlet assembly (10) is provided on the side of the oil tank body (31).

2. The multifunctional vacuum pump according to claim 1, wherein: The oil pump assembly (4) comprises a pump cover (41), a primary pump housing (42), a secondary pump housing (43), a first end cover (44) and a second end cover (45); the first end cover (44) is connected to the pump cover (41), the pump cover (41) is connected to the secondary pump housing (43), the secondary pump housing (43) is connected to the primary pump housing (42), the primary pump housing (42) is connected to the second end cover (45), and the second end cover (45) is connected to the motor assembly (21); a long rotor (46) and paired long blades (47) are provided in the primary pump housing (42), a short rotor (48) and paired short blades (49) are provided in the secondary pump housing (43); the short rotor (48) is provided with an oil pump rotor (410) which rotates synchronously therewith, the short rotor (48) and the long rotor (46) rotate synchronously, and the long rotor (46) rotates synchronously with the motor assembly (21); a first spring (411) is provided between the two long blades (47), and a second spring (412) is provided between the two short blades (49); the secondary pump housing (43) is communicated with the oil tank body (31), and a first channel (33) connecting the secondary pump housing (43) and the oil inlet pipe (11) is provided in the oil tank body (31); the secondary pump housing (43) is communicated with the gas ballast assembly (8), and the second end cover (45) is communicated with the air inlet assembly (9).

3. The multifunctional vacuum pump according to claim 2, wherein: A fuel tank assembly (3) is provided above the fuel pump assembly (4), and the fuel tank assembly (3) further comprises an oil-proof cover (34) and a fuel tank screw cap (35); the oil-proof cover (34) is provided at the open end of the fuel tank body (31), and the fuel tank screw cap (35) is threadedly connected to the fuel tank body (31); a vertically extending placement groove (36) is provided on the end cover of the fuel tank body (31), and an indicator light circuit board (12) is provided in the placement groove (36); a main control circuit board (13) is provided below the fuel pump assembly (4), the indicator light circuit board (12) is electrically connected to the gas ballast assembly (8), and the gas ballast assembly (8) is electrically connected to the main control circuit board (13); inside the cavity of the fuel tank body (31) A discharge port (32) is provided, the discharge port (32) is provided with an elastic pressing plate assembly (7), and an oil mist filter assembly (6) is provided above the elastic pressing plate assembly (7) and is fitted with the oil tank body (31); a plurality of evenly distributed mounting holes (37) are provided at the bottom of the oil tank body (31), and a condenser (5) is provided below the mounting holes (37); a sight glass (14) is provided on the end face of the oil tank body (31) facing the placement groove (36), a fixed pressing plate (15) connected to the oil tank body (31) is provided on the outside of the sight glass (14), and a sealing strip (16) is provided between the sight glass (14) and the oil tank body (31); an air outlet assembly (10) is also provided on the outer wall of the oil tank body (31).

4. The multifunctional vacuum pump according to claim 3, wherein: The gas ballast assembly (8) comprises a knob (81), a gas nozzle (82), a gas ballast connecting rod (83), a copper contact (84), a gas ballast circuit board (85), a gas ballast plug sleeve (86), a gas ballast plug (87) and a gas ballast shell (88); the gas ballast connecting rod (83) and the knob (81) are respectively mounted on both sides of the shell (1); a mounting groove (17) for mounting the gas ballast connecting rod (83) is provided in the shell (1), and the gas ballast connecting rod (83) is connected to the gas ballast plug sleeve (86) and rotates synchronously; a gas ballast plug (87) which rotates synchronously with the gas ballast plug sleeve (86) is provided in the gas ballast plug sleeve (86), and the gas ballast plug (87) is sleeved and mounted on the gas nozzle (82); the gas ballast shell (88) is sleeved and mounted on the outer layer of the gas ballast plug sleeve (86), and the gas ballast plug sleeve (86) can rotate relative to the gas ballast shell (88); the gas ballast circuit board (85) is arranged on A first fastener (18) is provided between the beginning end of the gas ballast housing (88) and the mounting groove (17); the copper contact (84) is mounted on the gas ballast connecting rod (83) and rotates synchronously therewith, and the contact point on the copper contact (84) is arranged toward the contact point on the gas ballast circuit board (85); a first vent hole (89) is provided on the gas ballast plug sleeve (86), a second vent hole (810) is provided on the gas ballast plug (87), and a third vent hole (811) is provided on the gas nozzle (82); the gas ballast circuit board (85) is electrically connected to the indicator circuit board (12), and the gas ballast circuit board (85) is also electrically connected to the main control circuit board (13); a vent groove (812) is provided on the gas ballast housing (88), and the vent groove (812) is arranged along the axial direction of the gas ballast housing (88).

5. The multifunctional vacuum pump according to claim 4, wherein: The gas ballast connecting rod (83) is provided with a columnar through hole (813), and a pair of positioning plugs (814) are provided in the columnar through hole (813), and a limiting bead (815) that is synchronously extended and retracted with the positioning plug is provided at the end of each positioning plug (814), and a compression spring (816) is provided between the two positioning plugs (814); a plurality of evenly distributed limiting grooves (19) are provided on the inner wall of the installation groove (17), and the outer contour of each limiting groove (19) matches the outer contour of the limiting bead (815); the first fastener (18) passes through the gas ballast housing (88) and the gas ballast circuit board (85) in sequence, The first vent hole (89) and the second vent hole (810) are coaxially mounted, and the third vent hole (811) is arranged opposite to the vent groove (812). When the first vent hole (89) and the third vent hole (811) are aligned, the gas ballast assembly (8) is in a conducting state. When the first vent hole (89) and the third vent hole (811) are misaligned, the gas ballast assembly (8) is in a closed state. A first pipeline (818) is provided between the gas nozzle (82) and the secondary pump housing (43) to connect the two. A retaining spring (817) for fastening is provided on the outside of the gas nozzle (82).

6. The multifunctional vacuum pump according to claim 3, wherein: The oil mist filter assembly (6) further includes a second fastener (64) and a third fastener (65); a lower protective cover (62) is provided at the horizontal bottom of the oil tank body (31); an upper protective cover (61) covering the lower protective cover (62) is provided on the lower protective cover (62); the lower protective cover (62) is arranged adjacent to the elastic pressing piece assembly (7); the upper protective cover (61), the lower protective cover (62) and the horizontal bottom of the oil tank body (31) surround and form an accommodating space; the elastic pressing piece assembly (7) is arranged in the accommodating space; the upper protective cover (61) and the lower protective cover (62) are arranged adjacent to the elastic pressing piece assembly (7); the upper protective cover (61), the lower protective cover (62) and the horizontal bottom of the oil tank body (31) surround and form an accommodating space; the elastic pressing piece assembly (7) is arranged in the accommodating space; the upper protective cover (61) and the lower protective cover (62) ) is provided between the upper protective cover (61) and the oil tank body (31), and a third fastener (65) is provided between the upper protective cover (61) and the oil tank body (31) for fixing the two. An oil outlet (66) is provided on the lower protective cover (62), and cross-arranged retaining bars (67) are provided on the oil outlet (66), and a filter (63) is provided on the retaining bars (67); the outer contour of the filter (63) matches the outer contour of the oil outlet (66), and the filter (63) and the inner wall of the oil outlet (66) are in contact with each other.

7. The multifunctional vacuum pump according to claim 6, wherein: The elastic pressing piece assembly (7) comprises a screw (71), a flat washer (72), a spring washer (73), a diaphragm (74) and a pressing piece body (75); the diaphragm (74) is placed on the discharge port (32), the pressing piece body (75) is installed on the diaphragm (74), the screw (71) passes through the pressing piece body (75) and the diaphragm (74) in sequence, and extends to be installed in the oil tank body (31); the screw (71) is provided with a flat washer (72) and a spring washer (73), and the flat washer (72) and the pressing piece body (75) are arranged adjacent to each other.

8. The multifunctional vacuum pump according to claim 3, wherein: A condenser (5) is provided directly below the oil tank body (31); the condenser (5) includes a plurality of vertically arranged condensation channels (51), and a horizontal channel (52) for communication is provided at the end of the condensation channel (51); the outer layer of the condensation channel (51) is provided with a plurality of evenly distributed heat sinks (53); an oil inlet pipe (11) is provided in the condensation channel (51) in the middle of the condenser (5), and a protective pad (54) is provided between the oil inlet pipe (11) and the inner wall of the condensation channel (51); one end of the oil inlet pipe (11) is provided at the bottom of the condensation channel (51), and the other end of the oil inlet pipe (11) is inserted into the first channel (33) of the oil tank body (31); a filter screen barrel (111) is provided at the bottom of the oil inlet pipe (11), and the filter screen barrel (111) is tightly connected to the oil inlet pipe (11); A partition (38) is provided on the side of the oil tank body (31), and an air outlet assembly (10) is provided on the open end of the partition (38); the air outlet assembly (10) comprises a spiral joint (101), a sealing ring (102), a filter (103) and an exhaust nut (104); the spiral joint (101) is threadedly connected to the open end of the partition (38), and the exhaust nut (104) is threadedly connected to the spiral joint (101); a groove (105) for mounting the sealing ring (102) is provided on the outer wall of the spiral joint (101), and the sealing ring (102) is tightly fitted with the groove (105); a filter (103) is provided between the end of the spiral joint (101) and the mesh of the exhaust nut (104), and the filter (103) and the mesh of the exhaust nut (104) are in contact with each other.

9. The multifunctional vacuum pump according to claim 2, wherein: The oil pump assembly (4) further comprises a first seal (413), a second seal (414), a third seal (415) and a fourth seal (416); the first seal (413) is arranged between the first end cover (44) and the pump cover (41), the second seal (414) is arranged between the pump cover (41) and the secondary pump housing (43), the third seal (415) is arranged between the secondary pump housing (43) and the primary pump housing (42), and the fourth seal (416) is arranged between the primary pump housing (42) and the second end cover (45); the oil pump rotor (410) is mounted in the end groove of the short rotor (48), the axial length of the long blade (47) is greater than the axial length of the short blade (49); the long blade (47) is provided with A first guide groove (417) is provided for installing a first spring (411), and a second guide groove (418) is provided on the short blade (49) for installing a second spring (412); the long blade (47) is installed on the long rotor (46) and abuts against the inner wall of the first-stage pump housing (42), and the short blade (49) is installed on the short rotor (48) and abuts against the inner wall of the second-stage pump housing (43); a second channel (419) communicating with the oil tank body (31) is provided on the top of the second-stage pump housing (43), and the second channel (419) is coaxially arranged with the discharge port (32); the end of the motor assembly (21) facing away from the oil pump assembly (4) is provided with a fan blade (20) that rotates synchronously with the motor assembly (4), and a heat dissipation plate (23) is provided on the bottom of the housing (1).

10. The multifunctional vacuum pump according to claim 1, wherein The air intake assembly (9) comprises an air intake connector (91), and the air intake connector (91) is provided with air intake ports (92) of different calibers; each of the air intake ports (92) is provided with a threaded protective sleeve (93), and each of the air intake ports (92) is also provided with a fifth sealing member (94) corresponding to its caliber; an air intake cover plate (95) is provided between the air intake connector (91) and the housing (1) to fix the two, and a bending pipe (96) is provided between the air intake connector (91) and the second end cover (45) to connect the two, and an anti-backflow ball (97) is provided at the end of the bending pipe (96) facing the second end cover (45).

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