Digital control oil filter

Abstract

The invention relates to the technical field of oil filters, in particular to a digital control oil filter. The filter press comprises a filter barrel and a filter pressing assembly. According to the device, in the process that the stirring barrel rotates in the first filtering cavity to drive the stirring rod to stir oil plants to accelerate exhaust of the oil plants, the stirring barrel drives the filter pressing plate to do up-down reciprocating motion in the second filtering cavity through the inner thread sleeve at the same time, when the filter pressing plate moves downwards, the oil channel is blocked and closed, and the filter pressing plate can compress the oil plants in the second filtering cavity; the piston shaft moves downwards in the suction pipe, so that the inner volume of the suction pipe is increased to form negative pressure, the oil in the negative pressure cavity is adsorbed, passes through the one-way valve and then enters the suction pipe to be temporarily stored, when the filter pressing plate moves upwards, the oil channel is smooth, and the oil temporarily stored in the suction pipe falls into the second filter cavity through the oil channel; therefore, the oil in the negative pressure cavity is introduced into the second filtering cavity, the oil in the second filtering cavity is compressed, and the oil filtering effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil filter machines, in particular to a digitally controlled oil filter machine. Background Art

[0002] The oil filter is a filtering device that uses gravity, centrifugal, pressure, vacuum distillation, mass transfer and other technical methods to remove mechanical impurities, oxidation byproducts and water in impure oil. The digital control oil filter can monitor the oil treatment process and effect in real time through the intelligent control system, and automatically adjust the working parameters according to the actual situation. This intelligent design makes the operation of the oil filter easier and more efficient.

[0003] For example, CN215505878U involves an oil filter based on digital control, including an oil filter body, a base is provided on the lower outer surface of the oil filter body, a mounting plate is provided on the upper outer surface of the base, a controller body is provided on one side of the upper outer surface of the base, four groups of self-locking universal wheels are provided on the lower outer surface of the base, a stabilizing mechanism is provided in the middle of the lower outer surface of the base, and fixing mechanisms are provided on the front and rear outer surfaces of the controller body.

[0004] The oil filter in the above patent effectively increases friction by setting a rubber hemisphere, reduces the movement caused by vibration when the main body of the oil filter is working, and can improve the fixing stability, but no improvement is made to the oil filtering structure. The oil in the oil filter only naturally passes through the filter medium by the oil's own gravity. The filtering pressure of the oil is low, which makes the flow rate of the oil in the filter medium low, resulting in a long filtering time of the oil and the problem of incomplete oil filtering, which affects the oil filtering efficiency of the oil filter.

[0005] In order to increase the filtering pressure of oil and improve the filtering efficiency of the oil filter, a digitally controlled oil filter is proposed. Summary of the invention

[0006] The object of the present invention is to provide a digitally controlled oil filter to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a digitally controlled oil filter, comprising a digital control system, a negative pressure box and an oil filter, wherein the oil filter comprises a filter barrel and a filter press assembly arranged in the filter barrel; An interlayer is provided on the outside of the filter barrel, and a first filter chamber, a negative pressure chamber, and a second filter chamber are sequentially provided in the middle of the filter barrel from top to bottom. An oil inlet pipe for introducing oil is provided in the interlayer, and the top end of the oil inlet pipe is connected to the first filter chamber. The filter press assembly includes a stirring structure and a filter press plate reciprocatingly threadedly connected to the bottom of the stirring structure, the stirring structure is located in the negative pressure chamber, the negative pressure chamber is connected to the negative pressure box through the stirring structure, the stirring structure is used to accelerate the gas discharge of the oil, the filter press plate is located in the second filter chamber and is used to apply pressure to accelerate the discharge of the oil, the stirring structure will drive the filter press plate to move up and down in the second filter chamber when stirring to accelerate the exhaust of the oil, the filter press plate will introduce the oil in the negative pressure chamber into the second filter chamber when the filter press plate moves up, and the filter press plate will squeeze the oil in the second filter chamber when it moves down to accelerate the filtration of the oil.

[0008] As a further improvement of the present technical solution, a primary filter for filtering out solid impurities in the oil is provided at the connection point between the bottom of the first filter chamber and the negative pressure chamber, a hollow vertical pipe is provided in the middle of the first filter chamber, the bottom end of the vertical pipe is connected to the negative pressure chamber, the top end of the vertical pipe passes through the filter barrel, the stirring structure is rotatably connected to the inner wall of the bottom end of the vertical pipe, the top end of the stirring structure is connected to the negative pressure box through the vertical pipe, and a replaceable fine filter is provided at the recessed position at the bottom end of the second filter chamber, and one or more replaceable filter elements for capturing particles in the oil are provided in the fine filter.

[0009] As a further improvement of the present technical solution, the stirring structure includes a pneumatic part connected to the negative pressure box and a stirring part located in the negative pressure chamber, the top of the stirring part is rotatably connected to the inner wall of the bottom end of the vertical pipe, and the top of the stirring part is connected to the bottom end of the pneumatic part. The airflow of the negative pressure box drives the pneumatic part to rotate, thereby driving the stirring part to stir the oil.

[0010] As a further improvement of the present technical solution, the pneumatic part includes an upper tube and a lower tube, one end of the upper tube is connected to the negative pressure box, the other end of the upper tube is connected to the air extraction device, a fan blade is provided in the upper tube, one end of the lower tube is connected to the negative pressure box, the other end of the lower tube is connected to the top end of the vertical tube, a transmission rod is provided at one end of the fan blade, and the bottom end of the transmission rod is connected to the stirring member.

[0011] As a further improvement of the present technical solution, the stirring member includes a stirring drum whose top is connected to the bottom end of the transmission rod, the outer wall of the top end of the stirring drum is rotatably connected to the inner wall of the bottom end of the vertical tube, a plurality of stirring rods are symmetrically arranged on the outer wall of the stirring drum, an airway is opened on the top of the stirring drum, the top of the airway is connected to the bottom end of the vertical tube, the bottom end of the airway passes through the outer wall of the stirring drum and is connected to the negative pressure chamber, and a breathable membrane is arranged at the bottom end of the airway.

[0012] As a further improvement of the technical solution, an inner screw shaft is provided on the top of the filter press plate, an inner screw sleeve is provided at the bottom end of the mixing drum, the inner screw shaft is located in the inner screw sleeve, the outer wall of the inner screw shaft is reciprocatingly threadedly connected with the inner wall of the inner screw sleeve, and an oil inlet channel and a control body for controlling the opening and closing of the oil inlet channel are also provided on the inner screw shaft, the top end of the oil inlet channel is connected to the negative pressure chamber, and the bottom end of the oil inlet channel passes through the bottom of the filter press plate.

[0013] As a further improvement of the technical solution, a rubber sealing ring is provided on the contact surface between the outer wall of the filter press plate and the inner wall of the second filter chamber.

[0014] As a further improvement of the present technical solution, the oil inlet channel includes a suction pipe opened at the bottom of the negative pressure chamber, and a one-way valve is arranged at the top of the suction pipe for limiting the one-way flow of oil in the negative pressure chamber into the suction pipe. A piston shaft is correspondingly opened on the upper surface of the filter press plate, and the top end of the piston shaft is plugged into the suction pipe, and the outer wall of the piston shaft contacts the inner wall of the suction pipe. An oil channel is opened on the piston shaft, and the top end of the oil channel passes through the top of the piston shaft, and the bottom end of the oil channel passes through the bottom of the filter press plate.

[0015] As a further improvement of the present technical solution, the control body includes a hanging plate arranged on the lower surface of the top of the second filter chamber, and a control plate is correspondingly arranged in the filter press plate. The control plate is a plate body with a through opening on the surface, and the control plate is plugged into and matched with the oil channel. A control groove is arranged on the surface of the hanging plate, and the control plate is located in the control groove at one end away from the piston shaft and is slidably connected to the control groove.

[0016] As a further improvement of the technical solution, the inner screw sleeve is rotatably connected to the inner wall of the bottom of the mixing drum, and a floating body that can move up and down is arranged in the middle of the mixing drum. The floating body includes a lifting shaft located in the mixing drum, and the bottom of the lifting shaft is plugged into and matched with the top of the inner screw sleeve. An outer edge frame is sleeved on the surface of the lifting shaft, and one end of the outer edge frame passes through the outer wall of the mixing drum and is plugged into and matched with a hollow float. The hollow float is connected to the surface of the outer edge frame via a set spring.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the digitally controlled oil filter machine, the stirring drum rotates in the first filter chamber to drive the stirring rod to stir the oil to accelerate the exhaust of the oil. At the same time, the stirring drum drives the filter press plate to make up and down reciprocating motion in the second filter chamber through the inner screw sleeve. When the filter press plate moves down, one end of the control plate is inserted into the oil passage, so that the oil passage is blocked and closed. The filter press plate can compress the oil in the second filter chamber and accelerate the oil filtering process of the oil through the filter element. The piston shaft moves down in the suction pipe, so that the volume of the suction pipe increases to form a negative pressure. The oil in the negative pressure chamber is adsorbed through the one-way valve and then enters the suction pipe for temporary storage. When the filter press plate moves up, one end of the control board is away from the oil passage, so that the oil passage is unobstructed, and the oil temporarily stored in the suction pipe falls into the second filter chamber through the oil passage, thereby realizing the effect of introducing the oil in the negative pressure chamber into the second filter chamber and compressing the oil in the second filter chamber, which can improve the oil filtering effect of the oil filter machine.

[0018] 2. In the digitally controlled oil filter, when there is less oil in the negative pressure chamber, the outer frame and the lifting shaft are located at a lower position in the mixing drum. At this time, only the bottom of the lifting shaft is plugged into the top of the inner screw sleeve, and the rotation of the mixing drum will not drive the filter plate to move up and down. When there is more oil in the negative pressure chamber, the hollow float floating on the liquid surface will drive the lifting shaft to rise along the inside of the mixing drum to the top of the lifting shaft and snap-fit ​​with the inside of the mixing drum. The rotation of the mixing drum will drive the inner screw sleeve to rotate synchronously, and then drive the filter plate to move up and down through the inner screw sleeve, which can avoid the situation where the oil is extracted into the second filter chamber before the exhaust process is completed, thereby ensuring the oil filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional structural diagram of the oil filter of the present invention; Figure 3 This is a cross-sectional structural diagram of the filter barrel of the present invention; Figure 4 It is a schematic diagram of the structure of the filter press assembly of the present invention; Figure 5 It is a structural diagram of the stirring structure of the present invention; Figure 6 The mixing drum structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 7 The mixing drum structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 8 It is a schematic diagram of the floating body structure of the present invention; Fig. 9 It is a cross-sectional structural diagram of the filter press plate of the present invention; Fig.10 It is a schematic diagram of the activity of the filter press assembly of the present invention.

[0020] The meaning of each number in the figure is: 11. Oil contamination sensor; 12. Digital pressure control switch; 13. PLC automatic control and mobile phone controller; 14. Digital temperature controller; 15. Oil inlet; 16. Oil outlet; 2. Negative pressure box; 21. Exhaust port; 3. Oil filter; 4. Filter barrel; 41. Interlayer; 411. Oil inlet pipe; 42. First filter chamber; 421. Primary filter; 43. Negative pressure chamber; 431. Suction pipe; 44. Second filter chamber; 441. Fine filter; 442. Filter element; 443. Hanging plate; 5. Filter press assembly; 51. Stirring structure; 511. Upper tube; 512. Fan blade; 513. Lower tube; 514. Transmission rod; 515. Stirring drum; 516. Stirring rod; 517. Breathable membrane; 518. Inner screw sleeve; 519. Floating body; 5191. Lifting shaft; 5192. Outer frame; 5193. Hollow float; 52. Filter press plate; 521. Inner screw shaft; 522. Piston shaft; 523. Control board. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the purpose of this embodiment is to provide a digitally controlled oil filter, the oil filter includes a digital control system, a negative pressure box 2 and an oil filter 3, wherein the digital control system includes an oil contamination sensor 11, a digital display pressure control switch 12, a PLC automatic control and mobile phone controller 13, a digital display temperature controller 14, an oil inlet 15, and an oil outlet 16, and the oil filter 3 includes a filter barrel 4 and a filter press assembly 5 arranged in the filter barrel 4; An interlayer 41 is provided on the outside of the filter barrel 4. A first filter chamber 42, a negative pressure chamber 43, and a second filter chamber 44 are provided in the middle of the filter barrel 4 from top to bottom. An oil inlet pipe 411 for introducing oil is provided in the interlayer 41. The top end of the oil inlet pipe 411 is connected to the first filter chamber 42. The bottom end of the oil inlet pipe 411 is connected to the oil inlet port 15. The bottom end of the second filter chamber 44 is connected to the oil outlet port 16 for discharging the filtered oil. The filter press assembly 5 includes a stirring structure 51 and a filter press plate 52 which is reciprocatingly threadedly connected to the bottom of the stirring structure 51. The stirring structure 51 is located in the negative pressure chamber 43. The negative pressure chamber 43 is connected to the negative pressure box 2 through the stirring structure 51. The stirring structure 51 is used to accelerate the gas discharge of the oil. The filter press plate 52 is located in the second filter chamber 44 and is used to apply pressure to accelerate the discharge of the oil. The oil to be filtered is introduced into the first filter chamber 42 through the oil inlet 15 and the oil inlet pipe 411. The oil is preliminarily filtered in the first filter chamber 42. Under the negative pressure of the negative pressure box 2, the oil in the first filter chamber 42 is attracted to fall downward into the negative pressure chamber 43. Similarly, Under the negative pressure of the negative pressure box 2, the negative pressure chamber 43 connected to the negative pressure box 2 is a low-pressure environment. Under the continuous stirring of the stirring structure 51, the gas in the oil is adsorbed and precipitated, and then sucked into the negative pressure box 2. When stirring, the stirring structure 51 will drive the filter press plate 52 to move up and down in the second filter chamber 44. When the filter press plate 52 moves up, the oil in the negative pressure chamber 43 is introduced into the second filter chamber 44. When the filter press plate 52 moves down, it squeezes the oil in the second filter chamber 44 to accelerate the filtration of the oil, so that the oil is discharged through the oil outlet 16, thereby improving the oil filtration efficiency. In addition, multiple oil filters in the present invention can be used in parallel to further improve the oil filtration efficiency.

[0025] The above structure is disclosed as follows: like Figure 2 , Figure 3As shown, a primary filter 421 for filtering out solid impurities in the oil is provided at the bottom of the first filter chamber 42 and the connection with the negative pressure chamber 43. A hollow vertical pipe is provided in the middle of the first filter chamber 42. The bottom end of the vertical pipe is connected with the negative pressure chamber 43. The top of the vertical pipe passes through the filter barrel 4. The stirring structure 51 is rotatably connected with the inner wall of the bottom end of the vertical pipe. The top of the stirring structure 51 is connected with the negative pressure box 2 through the vertical pipe. A fine filter 441 connected with the oil outlet 16 is provided at the bottom end depression of the second filter chamber 44. The outer wall of the fine filter 441 is threadedly connected with the inner wall of the bottom end depression mentioned above to facilitate the installation of the fine filter 441. Replacement, the fine filter 441 is provided with one or more filter elements 442 for capturing particles in the oil, and the filter element 442 is removable and replaceable. After the oil to be filtered enters the first filter chamber 42 through the oil inlet pipe 411, the oil passes downward through the primary filter 421 to filter out larger solid impurities. When the oil falls downward into the negative pressure chamber 43, due to the negative pressure effect of the negative pressure box 2, the negative pressure chamber 43 is a low-pressure environment. In the low-pressure environment, the gas dissolved in the oil will precipitate to form bubbles, and the bubbles float to the surface of the oil liquid and then enter the negative pressure box 2, thereby completing the exhaust treatment of the oil.

[0026] During exhaust treatment, in order to accelerate the process of gas in the oil gathering to form bubbles and floating to the liquid surface, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the stirring structure 51 includes a pneumatic part connected to the negative pressure box 2 and a stirring part located in the negative pressure chamber 43. The top of the stirring part is rotatably connected to the inner wall of the bottom end of the vertical tube, and the top of the stirring part is connected to the bottom end of the pneumatic part. The airflow of the negative pressure box 2 drives the pneumatic part to rotate, and then drives the stirring part to rotate in the negative pressure chamber 43 through the pneumatic part, stirring the oil to accelerate the process of gas in the oil gathering to form bubbles and floating to the liquid surface.

[0027] The structures of the pneumatic element and the stirring element are disclosed in detail below: The pneumatic part includes an upper tube 511 and a lower tube 513. One end of the upper tube 511 is connected to the negative pressure box 2, and the other end of the upper tube 511 is connected to the exhaust device. A fan blade 512 is arranged in the upper tube 511, one end of the lower tube 513 is connected to the negative pressure box 2, and the other end of the lower tube 513 is connected to the top of the vertical tube. A transmission rod 514 is arranged at one end of the fan blade 512, and the bottom end of the transmission rod 514 is connected to the stirring member. The exhaust device continuously extracts the air in the negative pressure box 2 through the upper tube 511, so that a negative pressure environment is formed in the negative pressure box 2, and the negative pressure box 2 then attracts the gas in the negative pressure chamber 43 through the lower tube 513. When the air in the upper tube 511 flows, it contacts the surface of the fan blade 512 and drives the fan blade 512 to rotate, so that the fan blade 512 drives the stirring member to rotate through the transmission rod 514.

[0028] The stirring member includes a stirring drum 515 whose top is connected to the bottom end of a transmission rod 514, and the outer wall of the top end of the stirring drum 515 is rotatably connected to the inner wall of the bottom end of the vertical tube. A plurality of stirring rods 516 are symmetrically arranged on the outer wall of the stirring drum 515. An airway is opened at the top of the stirring drum 515, and the top of the airway is connected to the bottom end of the vertical tube, and the bottom end of the airway passes through the outer wall of the stirring drum 515 and is connected to the negative pressure chamber 43. A breathable membrane 517 is arranged at the bottom end of the airway. When the fan blade 512 rotates, the stirring drum 515 is driven to rotate in the negative pressure chamber 43 through the transmission rod 514, and then the stirring rod 516 is driven to make a circular motion with the stirring drum 515 as the axis. The stirring of the oil by the stirring rod 516 accelerates the process of gas forming bubbles and floating to the surface of the oil liquid. The gas enters the airway through the breathable membrane 517, and then enters the negative pressure box 2 along the airway through the vertical tube and the lower tube 513. The gas is discharged through the exhaust port 21 after being processed by the negative pressure box 2.

[0029] After the exhaust treatment, the oil needs to enter the second filter chamber 44 for filtration. Figure 6 , Figure 7 , Fig. 9 As shown, an inner screw shaft 521 is provided on the top of the filter press plate 52, and an inner screw sleeve 518 is provided at the bottom of the mixing drum 515. The inner screw shaft 521 is located in the inner screw sleeve 518, and the outer wall of the inner screw shaft 521 is reciprocatingly threaded with the inner wall of the inner screw sleeve 518. The inner screw shaft 521 is also provided with an oil introduction channel and a control body for controlling the opening and closing of the oil introduction channel. The top of the oil introduction channel is connected to the negative pressure chamber 43, and the bottom of the oil introduction channel passes through the bottom of the filter press plate 52. When the mixing drum 515 rotates, Fig.10 As shown by the arrow a in the middle, the filter plate 52 is driven by the inner screw sleeve 518 to make up and down reciprocating motion in the second filter chamber 44. The displacement direction of the filter plate 52 is as shown in FIG. Fig.10 As shown by the middle arrow b, when the filter press plate 52 moves downward, the control body controls the oil introduction channel to be closed. The downward movement of the filter press plate 52 will drive the oil introduction channel to extract oil from the negative pressure chamber 43, and the filter press plate 52 itself will compress the oil in the second filter chamber 44, accelerating the oil to pass through the fine filter 441. When the filter press plate 52 moves upward, the control body controls the oil introduction channel to be opened. The oil previously extracted from the negative pressure chamber 43 by the oil introduction channel will pass through the filter press plate 52 and fall into the second filter chamber 44 through the oil introduction channel. Furthermore, a rubber sealing ring is provided on the contact surface between the outer wall of the filter press plate 52 and the inner wall of the second filter chamber 44. By ensuring the sealing between the filter press plate 52 and the second filter chamber 44, the compression effect of the oil in the second filter chamber 44 when the filter press plate 52 moves downward is facilitated.

[0030] The specific structures of the above-mentioned oil introduction channel and control body are disclosed below: The oil inlet passage includes a suction pipe 431 opened at the bottom of the negative pressure chamber 43, a one-way valve for limiting the one-way flow of oil in the negative pressure chamber 43 into the suction pipe 431 is arranged at the top of the suction pipe 431, a piston shaft 522 is correspondingly opened on the upper surface of the filter press plate 52, the top end of the piston shaft 522 is located in the suction pipe 431 and plugged into the suction pipe 431, the outer wall of the piston shaft 522 contacts the inner wall of the suction pipe 431, the piston shaft 522 is opened with an oil passage, the top end of the oil passage passes through the top of the piston shaft 522 The bottom end of the oil passage passes through the bottom of the filter plate 52. The control body includes a hanging plate 443 arranged on the lower surface of the top of the second filter chamber 44. A control plate 523 is correspondingly arranged in the filter plate 52. The control plate 523 is a plate body with a through opening on the surface. The control plate 523 is plugged into the oil passage at one end close to the piston shaft 522. A control groove is opened on the surface of the hanging plate 443. The control groove is a parallelogram groove. The end of the control plate 523 away from the piston shaft 522 is located in the control groove and is slidably connected to the control groove. Fig.10 As shown, when the filter press plate 52 moves up and down, the relative position of the filter press plate 52 and the hanging plate 443 changes, which will drive the control plate 523 that is slidably connected to the control groove of the hanging plate 443 to move in the filter press plate 52. The moving direction of the control plate 523 is shown by arrow c. When the filter press plate 52 moves down, one end of the control plate 523 slides in the control groove until one end of the control plate 523 is inserted into the oil passage, so that the oil passage is blocked and closed. Therefore, when the filter press plate 52 moves down, the filter press plate 52 can compress the oil in the second filter chamber 44, accelerate the oil filtering process of the oil through the filter element 442, and the piston shaft 5 22 moves downward in the suction pipe 431, so that the internal volume of the suction pipe 431 increases to form a negative pressure, and the oil in the negative pressure chamber 43 is adsorbed and passes through the one-way valve and enters the suction pipe 431 for temporary storage. When the filter press plate 52 moves upward, correspondingly, one end of the control plate 523 slides in the control groove until one end of the control plate 523 is away from the oil passage, so that the oil passage is unobstructed, and the oil temporarily stored in the suction pipe 431 falls into the second filter chamber 44 through the oil passage, as shown by the arrow d, and the above process is repeated, thereby achieving the effect of introducing the oil in the negative pressure chamber 43 into the second filter chamber 44 and compressing the oil in the second filter chamber 44.

[0031] Since the oil introduction channel is arranged at the bottom of the negative pressure chamber 43, part of the oil will be extracted from the bottom layer of the oil in the negative pressure chamber 43 when the oil is pumped out. Considering that when the oil filter starts to filter the oil, the oil introduced by the oil inlet pipe 411 and falling into the negative pressure chamber 43 is relatively small, the oil may be extracted by the suction pipe 431 before the exhaust process is completed, thereby affecting the oil filtering effect. In order to avoid this situation, Figure 7 , Figure 8As shown, the inner screw sleeve 518 is rotatably connected to the inner wall of the bottom of the mixing drum 515, and a floating body 519 that moves up and down is arranged in the middle of the mixing drum 515. The floating body 519 includes a lifting shaft 5191 located in the mixing drum 515. The bottom of the lifting shaft 5191 is plugged and matched with the top of the inner screw sleeve 518. The surface of the lifting shaft 5191 is sleeved with an outer frame 5192. One end of the outer frame 5192 passes through the outer wall of the mixing drum 515 and is plugged and matched with a hollow floating ball 5193. The hollow floating ball 5193 is connected to the surface of the outer frame 5192 through a set spring. When the oil in the negative pressure chamber 43 is less, the outer frame 5192 and the lifting shaft 5191 are located at a lower position in the mixing drum 515. At this time, the lifting shaft 5191 is sleeved with an outer frame 5192. Only the bottom of the lowering shaft 5191 is plugged into and matched with the top of the inner screw sleeve 518, that is, the rotation of the mixing drum 515 will not drive the filter press plate 52 to move up and down. When there is a lot of oil in the negative pressure chamber 43, the hollow float 5193 floating on the liquid surface will drive the lifting shaft 5191 to rise along the inside of the mixing drum 515 to the top of the lifting shaft 5191 and snap-fit ​​with the inside of the mixing drum 515. At this time, the bottom of the lifting shaft 5191 is plugged into and matched with the top of the inner screw sleeve 518, and the top of the lifting shaft 5191 is snap-fitted with the inside of the mixing drum 515, that is, the rotation of the mixing drum 515 will drive the inner screw sleeve 518 to rotate synchronously, and then drive the filter press plate 52 to move up and down through the inner screw sleeve 518, thereby ensuring the oil filtering effect.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A digitally controlled oil filter, comprising a digital control system, a negative pressure box (2) and an oil filter (3), characterized in that: The oil filter (3) comprises a filter barrel (4) and a filter press assembly (5) arranged in the filter barrel (4); An interlayer (41) is provided on the outside of the filter barrel (4), and a first filter chamber (42), a negative pressure chamber (43), and a second filter chamber (44) are provided in sequence from top to bottom in the middle of the filter barrel (4). An oil inlet pipe (411) for introducing oil is provided in the interlayer (41), and the top end of the oil inlet pipe (411) is connected to the first filter chamber (42); The filter press assembly (5) comprises a stirring structure (51) and a filter press plate (52) connected to the bottom of the stirring structure (51) by a reciprocating thread. The stirring structure (51) is located in the negative pressure chamber (43). The negative pressure chamber (43) is connected to the negative pressure box (2) through the stirring structure (51). The stirring structure (51) is used to accelerate the gas discharge of the oil. The filter press plate (52) is located in the second filter chamber (44) and is used to apply pressure to accelerate the discharge of the oil. When the stirring structure (51) accelerates the exhaust of the oil, it drives the filter press plate (52) to move up and down in the second filter chamber (44). When the filter press plate (52) moves up, it introduces the oil in the negative pressure chamber (43) into the second filter chamber (44). When the filter press plate (52) moves down, it squeezes the oil in the second filter chamber (44) to accelerate the filtration of the oil.

2. The digital controlled oil filter according to claim 1, characterized in that: A primary filter (421) for filtering out solid impurities in the oil is provided at the connection point between the bottom of the first filter chamber (42) and the negative pressure chamber (43); a hollow vertical pipe is provided in the middle of the first filter chamber (42); the bottom end of the vertical pipe is connected to the negative pressure chamber (43); the top end of the vertical pipe passes through the filter barrel (4); the stirring structure is rotatably connected to the inner wall of the bottom end of the vertical pipe; the top end of the stirring structure is connected to the negative pressure box (2) through the vertical pipe; a replaceable fine filter (441) is provided at the recessed position at the bottom end of the second filter chamber (44); one or more replaceable filter elements (442) for capturing particles in the oil are provided in the fine filter (441).

3. The digitally controlled oil filter according to claim 2 is characterized in that: The stirring structure comprises a pneumatic member connected to the negative pressure box (2) and a stirring member located in the negative pressure chamber (43); the top end of the stirring member is rotatably connected to the inner wall of the bottom end of the vertical pipe; the top end of the stirring member is connected to the bottom end of the pneumatic member; the airflow of the negative pressure box (2) drives the pneumatic member to rotate, thereby driving the stirring member to stir the oil.

4. The digitally controlled oil filter according to claim 3 is characterized in that: The pneumatic member comprises an upper tube (511) and a lower tube (513); one end of the upper tube (511) is in communication with the negative pressure box (2); the other end of the upper tube (511) is connected to an air extraction device; a fan blade (512) is provided in the upper tube (511); one end of the lower tube (513) is in communication with the negative pressure box (2); the other end of the lower tube (513) is in communication with a top end of the vertical tube; a transmission rod (514) is provided at one end of the fan blade (512); the bottom end of the transmission rod (514) is connected to the stirring member.

5. The digitally controlled oil filter according to claim 4 is characterized in that: The stirring member comprises a stirring drum (515) whose top end is connected to the bottom end of the transmission rod (514); the outer wall of the top end of the stirring drum (515) is rotatably connected to the inner wall of the bottom end of the vertical tube; a plurality of stirring rods (516) are symmetrically arranged on the outer wall of the stirring drum (515); an airway is opened at the top of the stirring drum (515); the top end of the airway is connected to the bottom end of the vertical tube; the bottom end of the airway passes through the outer wall of the stirring drum (515) and is connected to the negative pressure chamber (43); and a breathable membrane (517) is arranged at the bottom end of the airway.

6. The digitally controlled oil filter according to claim 5, characterized in that: An inner screw shaft (521) is arranged at the top of the filter press plate (52), an inner screw sleeve (518) is arranged at the bottom end of the mixing drum (515), the inner screw shaft (521) is located inside the inner screw sleeve (518), the outer wall of the inner screw shaft (521) is reciprocatingly threadedly connected to the inner wall of the inner screw sleeve (518), an oil introduction channel and a control body for controlling the opening and closing of the oil introduction channel are also arranged on the inner screw shaft (521), the top end of the oil introduction channel is communicated with the negative pressure chamber (43), and the bottom end of the oil introduction channel passes through the bottom of the filter press plate (52).

7. The digitally controlled oil filter according to claim 2 is characterized in that: A rubber sealing ring is provided on the contact surface between the outer wall of the filter press plate (52) and the inner wall of the second filter cavity (44).

8. The digitally controlled oil filter according to claim 6, characterized in that: The oil introduction channel comprises a suction pipe (431) opened at the bottom of the negative pressure chamber (43); a one-way valve for limiting the one-way flow of oil in the negative pressure chamber (43) into the suction pipe (431) is arranged at the top of the suction pipe (431); a piston shaft (522) is correspondingly opened on the upper surface of the filter press plate (52); the top end of the piston shaft (522) is plugged into the suction pipe (431); the outer wall of the piston shaft (522) contacts the inner wall of the suction pipe (431); an oil passage is opened on the piston shaft (522); the top end of the oil passage passes through the top of the piston shaft (522); and the bottom end of the oil passage passes through the bottom of the filter press plate (52).

9. The digitally controlled oil filter according to claim 8, characterized in that: The control body comprises a hanging plate (443) arranged on the lower surface of the top of the second filter cavity (44); a control plate (523) is correspondingly arranged in the filter press plate (52); the control plate (523) is a plate body with a through opening on the surface; the control plate (523) is plug-fitted with the oil passage; a control groove is arranged on the surface of the hanging plate (443); an end of the control plate (523) away from the piston shaft (522) is located in the control groove and is slidably connected to the control groove.

10. The digitally controlled oil filter according to claim 6, characterized in that: The inner thread sleeve (518) is rotatably connected to the inner wall of the bottom of the mixing drum (515); a floating body (519) movable up and down is provided in the middle of the mixing drum (515); the floating body (519) comprises a lifting shaft (5191) located in the mixing drum (515); the bottom of the lifting shaft (5191) is plugged into the top of the inner thread sleeve (518); an outer edge frame (5192) is sleeved on the surface of the lifting shaft (5191); one end of the outer edge frame (5192) passes through the outer wall of the mixing drum (515) and is plugged into a hollow floating ball (5193); the hollow floating ball (5193) is connected to the surface of the outer edge frame (5192) via a provided spring.

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