Oil filter

Abstract

The invention discloses an oil filter, and belongs to the technical field of filters. The engine oil filter comprises a protective shell. An engine oil filter element of the filter unit is arranged in a protective shell, the interior of the engine oil filter element is a clean side space, and the exterior of the engine oil filter element is a dirty side space; a venturi tube of the slow release structural part is arranged in the engine oil filter element, the venturi tube comprises a liquid inlet tube section, a throat tube section and a diffusion tube section which are connected in sequence, and engine oil in the clean side space can flow out of the filter unit through the liquid inlet tube section, the throat tube section and the diffusion tube section in sequence; a filling tank of the adding unit is filled with an additive, the filling tank is provided with an inlet and an outlet, the inlet is communicated with the clean side space, the outlet is communicated with the throat pipe section, a flow guide pipe is arranged at the outlet, and one end of the flow guide pipe extends into the filling tank and is located below the liquid level of the additive. The total base number of the engine oil is in a reasonable range, the service life of the engine oil is prolonged, and good operation of an engine is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a machine oil filter. BACKGROUND

[0002] During the continuous operation of the engine, a series of acidic substances will inevitably be generated due to the complex physical and chemical changes inside. The generation pathways of these acidic substances are diverse. Some are intermediate products produced by incomplete combustion of fuel during the combustion process, which are further oxidized to form; some are products of chemical reactions of engine internal parts under high temperature and high pressure environment. When these acidic substances enter the engine oil along with the circulating system of the engine, they will have a significant impact on the performance of the engine oil, the most critical of which is the gradual decline of the total base number (TBN) of the engine oil.

[0003] The total base number of engine oil is an important indicator of the ability of engine oil to neutralize acidic substances. Once the total base number decreases, it means that the ability of engine oil to neutralize acidic substances is weakened. As acidic substances continue to accumulate in the engine oil, the acid-base balance of the engine oil is broken, and its basic functions such as lubrication, cooling, cleaning, and rust prevention will be damaged to varying degrees. This not only directly affects the service life of the engine oil, making it need to be replaced more frequently and increasing the cost of use; but also reduces the protection effect of the engine oil on the engine, and cannot provide effective lubrication and protection for various precision parts inside the engine, thereby affecting the overall performance and reliability of the engine and shortening the service life of the engine.

[0004] In particular, in recent years, new fuels such as methanol and biodiesel have been increasingly widely used in the field of engines. However, these new fuels have some unique chemical properties. Compared with traditional fuels, they are more likely to produce acidic substances during combustion, or the acidic substances produced have stronger acidity. This results in the speed of acidic substances being absorbed by engine oil increasing and the total base number decreasing faster in engines using new fuels such as methanol and biodiesel. For example, in some engines that use biodiesel as the main fuel, the total base number of the engine oil may decrease to the extent that the engine oil needs to be replaced in a relatively short period of time after a period of operation, which brings greater challenges to the maintenance and maintenance of the engine. SUMMARY

[0005] The purpose of the present application is to provide a machine oil filter that keeps the total base number of engine oil within a reasonable range, prolongs the service life of engine oil, and protects the engine to run well.

[0006] To achieve the above purpose, the following technical solutions are provided:

[0007] The machine oil filter comprises:

[0008] a protective shell;

[0009] The filter unit comprises an oil filter element, an inner part of the oil filter element is a clean side space, and an outer part of the oil filter element is a dirty side space;

[0010] The slow-release structure comprises a Venturi tube, the Venturi tube is arranged in the inner part of the oil filter element, the Venturi tube comprises a liquid inlet pipe section, a throat pipe section and a diffusion pipe section connected in sequence, and the oil in the clean side space can flow out of the filter unit through the liquid inlet pipe section, the throat pipe section and the diffusion pipe section in sequence.

[0011] The adding unit comprises a filling tank, the filling tank is filled with an additive, the filling tank has an inlet and an outlet, the inlet is in communication with the clean side space, the outlet is in communication with the throat pipe section, a flow guide pipe is arranged at the outlet, one end of the flow guide pipe extends into the filling tank and is below the liquid surface of the additive.

[0012] As an optional solution of the oil filter, the filling tank comprises a cover body and a containing cavity, the cover body is sealingly buckled on the containing cavity, the cover body and the containing cavity form a storage space of the additive, the inlet and the outlet are arranged on the cover body, and the inlet and the outlet are in communication with the storage space.

[0013] As an optional solution of the oil filter, one side of the cover body towards the oil filter element has a mounting boss, the oil filter element is sleeved on the mounting boss, the mounting boss has a mounting groove and a buffer groove penetrating each other, a groove bottom of the buffer groove is in communication with the outlet, and the slow-release structure further comprises:

[0014] A communication pipe, one end of the communication pipe is inserted into the mounting groove, and the other end of the communication pipe extends into the throat pipe section through the liquid inlet pipe section.

[0015] As an optional solution of the oil filter, the slow-release structure further comprises:

[0016] A first connecting rib, one end of the first connecting rib is connected with an outer wall surface of the communication pipe, the other end of the first connecting rib is connected with an inner wall surface of the throat pipe section, and a plurality of first connecting ribs are arranged in a circumferential direction and spaced apart from each other with the axis of the communication pipe as the center.

[0017] As an optional solution of the oil filter, the slow-release structure further comprises:

[0018] A liquid uniformizing piece, the liquid uniformizing piece is arranged in the communication pipe, a center of the liquid uniformizing piece is provided with a liquid uniformizing hole, and an outer edge of the liquid uniformizing piece is provided with a plurality of second connecting ribs, each second connecting rib extends along a radial direction of the liquid uniformizing piece and is connected with an inner wall surface of the communication pipe.

[0019] As an optional solution of the oil filter, the first annular sealing member is arranged between the outer wall surface of the mounting boss and the inner wall surface of the oil filter element.

[0020] As an optional solution of the oil filter, a first annular limiting groove is arranged on the outer wall surface of the mounting boss, and part of the first annular sealing member is arranged in the first annular limiting groove.

[0021] As an optional solution of the oil filter, the second annular sealing member is arranged between the outer wall surface of the communication pipe and the inner wall surface of the mounting groove.

[0022] As an optional solution of the oil filter, a second annular limiting groove is arranged on the outer wall surface of the communication pipe, and part of the second annular sealing member is arranged in the second annular limiting groove.

[0023] As an optional solution of the oil filter, the inner diameter of the inlet and / or the flow guide pipe is 0.1-5 mm; and / or

[0024] The inlet is provided with a one-way valve.

[0025] Compared with the prior art, the oil filter has the following beneficial effects:

[0026] The oil filter provided by the application is characterized in that the Venturi pipe of the slow-release structure is arranged in the oil filter element of the filtering unit, the adding unit and the filtering unit are sequentially arranged in the protective shell, and the oil filter is arranged on the oil circulation loop pipe of the engine. The oil in the oil circulation loop pipe enters the protective shell and is located in the dirty side space of the oil filter element. The oil is pushed by the oil pressure to pass through the oil filter element and enter the clean side space. Most of the filtered oil sequentially flows out of the filtering unit through the liquid inlet pipe section, the throat pipe section and the diffusion pipe section of the Venturi pipe, and is discharged from the protective shell. The inlet of the adding tank is in communication with the clean side space of the oil filter element, the outlet is in communication with the throat pipe section, one end of the flow guide pipe extends into the adding tank and is located below the liquid level of the additive, and the other end of the flow guide pipe is in communication with the outlet. The liquid inlet pipe section and the diffusion pipe section are tapered towards the throat pipe section, so that a negative pressure is formed in the throat pipe section by using the Venturi principle. A part of the oil flows into the adding tank through the inlet, and the pressure above the liquid level of the additive is increased. By using the effect that the pressure in the adding tank is greater than the pressure in the throat pipe section, the additive flows into the throat pipe section through the flow guide pipe and the outlet and is mixed with the oil. By using the pressure difference generated by the Venturi pipe, the additive is added to the oil, so that the total alkalinity of the oil is in a reasonable range for a long time, the service life of the oil is prolonged, and the engine is protected to run well. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the contents of the embodiments of the present application and the drawings.

[0028] Figure 1 The assembly schematic diagram of the oil filter in the embodiments of the present application;

[0029] Figure 2 The assembly schematic diagram of the oil filter element and the slow-release structural member in the embodiments of the present application;

[0030] Figure 3 The side view of the slow-release structural member in the embodiments of the present application;

[0031] Figure 4 The three-dimensional view of the slow-release structural member in the embodiments of the present application;

[0032] Figure 5 The structural schematic diagram of the filling tank in the embodiments of the present application;

[0033] Figure 6 The structural schematic diagram of the cover in the embodiments of the present application;

[0034] Figure 7 The assembly schematic diagram of the slow-release structural member and the cover in the embodiments of the present application.

[0035] Reference signs:

[0036] 100, protective shell; 200, filter unit; 300, slow-release structural member; 400, adding unit; 500, spring;

[0037] 1, oil filter element; 2, venturi; 3, filling tank; 4, communication pipe; 5, first connecting rib; 6, liquid uniformizing member; 7, first annular sealing member; 8, second annular sealing member;

[0038] 101, clean side space; 102, dirty side space;

[0039] 201, liquid inlet pipe section; 202, throat pipe section; 203, diffusion pipe section;

[0040] 301, cover; 3011, inlet; 3012, outlet; 3013, flow guide pipe; 3014, mounting boss; 30141, mounting groove; 30142, buffer groove; 30143, first annular limiting groove; 302, containing cavity;

[0041] 401, second annular limiting groove;

[0042] 601, liquid uniforming hole; 602, second connecting rib. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0044] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the present application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0047] The total base number of engine oil is an important indicator of the ability of engine oil to neutralize acidic substances. Once the total base number decreases, it means that the ability of engine oil to neutralize acidic substances is weakened. As acidic substances continue to accumulate in engine oil, the acid-base balance of engine oil is broken, and its basic functions such as lubrication, cooling, cleaning, and rust prevention will be damaged to varying degrees. This not only directly affects the service life of engine oil, making engine oil need to be replaced more frequently and increasing the use cost, but also reduces the protection effect of engine oil on the engine, and cannot provide effective lubrication and protection for various precision parts inside the engine, thereby affecting the overall performance and reliability of the engine and shortening the service life of the engine.

[0048] In particular, in recent years, new fuels such as methanol and biodiesel have been increasingly widely used in the field of engines. However, these new fuels have some unique chemical properties. Compared with traditional fuels, they are more likely to produce acidic substances during combustion, or the acidic substances produced have stronger acidity. This leads to the speed of engine oil absorbing acidic substances to accelerate and the total base number to decrease faster in engines using new fuels such as methanol and biodiesel. For example, in some engines using biodiesel as the main fuel, after a period of operation, the total base number of engine oil may decrease to the extent that engine oil needs to be replaced in a relatively short period of time, which brings greater challenges to the maintenance and care of the engine.

[0049] In order to keep the total base number of engine oil within a reasonable range, prolong the service life of engine oil, and protect the engine to run well, the present embodiment provides an engine oil filter, which is described in detail below Figures 1 to 7 The specific content of the present embodiment is described in detail.

[0050] The oil filter in the embodiment includes a protective shell 100, a filtering unit 200, a slow-release structural member 300 and an adding unit 400. The protective shell 100 serves as an external support structure of the entire oil filter, and provides a safe and stable mounting environment for the other components inside, effectively resisting the interference of external collisions, dust and impurities and other adverse factors, and ensuring the normal operation of the internal components. The filtering unit 200 includes an oil filter element 1, which is arranged in the protective shell 100. The oil filter element 1 cleverly divides the internal space of the protective shell 100 into two areas: the inside of the oil filter element 1 is the clean side space 101, where the clean oil after filtration is gathered; the outside of the oil filter element 1 is the dirty side space 102, where the oil carrying a large amount of impurities and pollutants in the engine circulation loop first enters. This clear division of space provides a basic condition for efficient filtration of oil. The slow-release structural member 300 includes a Venturi tube 2, which is assembled inside the oil filter element 1. The Venturi tube 2 is composed of a liquid inlet pipe section 201, a throat pipe section 202 and a diffuser pipe section 203 connected in sequence, and the oil in the clean side space 101 can flow out of the filtering unit 200 through the liquid inlet pipe section 201, the throat pipe section 202 and the diffuser pipe section 203 in sequence. The adding unit 400 includes a filling tank 3, which is filled with an additive. This additive has special chemical properties and can play an important regulating role in the oil. The filling tank 3 has an inlet 3011 and an outlet 3012. The inlet 3011 is in communication with the clean side space 101, and the outlet 3012 is in communication with the throat pipe section 202 of the Venturi tube 2. A flow guide pipe 3013 is arranged at the outlet 3012, one end of which extends into the filling tank 3 below the liquid level of the additive, ensuring accurate and stable guidance of the outflow of the additive.

[0051] The various components of the oil filter cooperate with each other to achieve the filtration of engine oil and the slow release of additives. In actual application, the Venturi tube 2 of the slow release structure 300 is first precisely assembled into the oil filter element 1 of the filtration unit 200, and then the addition unit 400 and the filtration unit 200 are sequentially and stably installed into the protective shell 100. Finally, the entire oil filter is assembled onto the engine oil circulation loop pipe. When the engine starts, the engine oil in the engine oil circulation loop pipe enters the protective shell 100 under the action of pressure, at which time the engine oil is first located in the dirty side space 102 of the oil filter element 1. Under the push of oil pressure, the engine oil begins to be filtered through the oil filter element 1. The oil filter element 1 can effectively intercept impurities, metal particles and other contaminants in the engine oil, so that clean engine oil enters the clean side space 101. This process ensures that the engine oil entering the key components of the engine has high cleanliness, reducing wear and failure. Most of the filtered engine oil flows out of the filtration unit 200 through the liquid inlet pipe section 201, the throat pipe section 202 and the diffuser pipe section 203 of the Venturi tube 2 in turn, and is discharged from the protective shell 100, continuing to participate in the lubrication cycle of the engine. The unique design of the Venturi tube 2 plays a key role here. The liquid inlet pipe section 201 and the diffuser pipe section 203 are both tapered towards the throat pipe section 202. According to the Venturi principle, when the engine oil flows through the tapered pipe section at a certain speed, the flow rate will increase and the pressure will decrease. Therefore, a negative pressure area is formed in the throat pipe section 202, which provides the necessary pressure conditions for the subsequent intake of additives. The inlet 3011 of the filling tank 3 communicates with the clean side space 101 of the oil filter element 1, the outlet 3012 communicates with the throat pipe section 202, and the flow guide pipe 3013 extends into the filling tank 3 below the liquid level of the additive and communicates with the outlet 3012 at the other end. Due to the negative pressure formed by the throat pipe section 202, part of the engine oil will flow into the filling tank 3 through the inlet 3011. As the engine oil flows in, the pressure above the liquid level of the additive in the filling tank 3 gradually increases. At this time, the pressure in the filling tank 3 is greater than the pressure in the throat pipe section 202, and under the action of this pressure difference, the additive will flow into the throat pipe section 202 through the flow guide pipe 3013 and the outlet 3012, and rapidly mix with the engine oil flowing through the throat pipe section 202.

[0052] In summary, in this embodiment, the pressure difference generated by the Venturi tube 2 is used to accurately and quantitatively add additives to the engine oil. The additives can neutralize acidic substances generated during the use of the engine oil, effectively adjusting the total alkalinity of the engine oil, so that it remains within a reasonable range for a longer period of time. This is crucial for maintaining the chemical stability and lubricating performance of the engine oil, ensuring that the engine oil always provides good lubrication and protection for the engine. Because the additives can continuously neutralize acidic substances, the oxidation and deterioration rate of the engine oil is reduced, significantly extending the service life of the engine oil. This means that the engine can use the same batch of engine oil for a longer period of time, reducing the frequency and cost of engine oil replacement. At the same time, it reduces the generation of waste engine oil, which is also positive for environmental protection. Clean engine oil and reasonable total alkalinity can provide comprehensive protection for the engine. On the one hand, clean engine oil after filtration can effectively reduce the wear and tear of internal engine parts, reducing the probability of failure; on the other hand, the neutralizing effect of additives can prevent acidic substances from corroding metal parts of the engine, protecting the good running state of the engine. This helps to improve the reliability and durability of the engine, extending the service life of the engine and saving users maintenance costs and time. Stable engine oil performance and good lubrication can ensure that the engine runs efficiently under various working conditions. Reducing the problem of power loss and increased fuel consumption due to declining engine oil performance improves the engine's fuel economy and power output. At the same time, it reduces the noise and vibration of the engine, improving the comfort of driving.

[0053] It can be understood that the upper end of the oil filter element 1 in this embodiment is provided with an upper end cover (the periphery of the upper end cover has a plurality of oil inlet ports, and the center position is provided with an oil outlet port, which is in communication with the diffuser pipe section 203 of the Venturi tube 2), which is used to limit the position of the oil filter element 1. This is a conventional technical means, so it will not be described in detail.

[0054] Further, the filling tank 3 is composed of two parts, a cover 301 and a containing cavity 302. The containing cavity 302 is the main structure of the filling tank 3, which has a specific volume of space inside for containing the additive. The containing cavity 302 is made of high-strength, corrosion-resistant material, which can withstand various pressures and chemical corrosion that the oil filter may encounter during operation, ensuring that the additive does not leak or deteriorate during storage. The cover 301 is sealed and set on the containing cavity 302, and the cover 301 and the containing cavity 302 form an additive storage tank. A high-performance sealing ring can be provided between the contact surface of the cover 301 and the containing cavity 302, which can effectively prevent the leakage of the additive, and also prevent foreign matter such as dust and moisture from entering the storage tank, ensuring the purity and quality of the additive. After the cover 301 and the containing cavity 302 are tightly fitted, they jointly form a closed additive storage tank, providing a safe and stable storage environment for the additive. The inlet 3011 and the outlet 3012 are both provided on the cover 301 and are in communication with the storage tank. The design of the inlet 3011 allows the clean side space 101 to flow smoothly into the storage tank, while the outlet 3012 provides a channel for the additive to flow out, ensuring that the additive can accurately flow into the throat section 202 of the Venturi tube 2 according to the preset process and mix with the oil, ensuring smooth flow of the oil and the additive, and avoiding the problem of blockage or poor flow. During the operation of the oil filter, the negative pressure generated by the Venturi tube 2 attracts the additive to flow out. Due to the stable structure of the filling tank 3 and the fixed size of the inlet 3011 and the outlet 3012, when the negative pressure formed by the throat section 202 is stable, a relatively stable proportional relationship can be formed between the amount of oil flowing into the storage tank and the amount of additive flowing out of the storage tank. This precise release mechanism can ensure that the additive is added to the oil according to the actual needs of the engine, avoiding the problem of waste or insufficient addition of the additive. It can effectively neutralize the acidic substances in the oil and maintain the total base number of the oil within a reasonable range, without affecting other properties of the oil such as lubricity and flowability due to excessive addition of the additive.

[0055] Further, the cover 301 has a mounting boss 3014 on the side facing the oil filter element 1, and the oil filter element 1 is sleeved on the mounting boss 3014. This sleeving manner not only ensures the relative position between the oil filter element 1 and the filling tank 3, but also effectively resists the impact force and vibration generated by the flow of oil during engine operation, so as to ensure that the oil filter element 1 is always stably in the working position and cannot be displaced or loosened, thereby providing a basic guarantee for reliable filtration of oil. The mounting boss 3014 has a mounting groove 30141 and a buffer groove 30142 that are in communication with each other, and the groove bottom of the buffer groove 30142 is in communication with the outlet 3012. The mounting groove 30141 provides a stable mounting space for the communication pipe 4 of the slow-release structure 300, and the shape and size of the mounting groove 30141 are matched with the communication pipe 4, so that the communication pipe 4 can be tightly inserted therein to prevent oil leakage. The buffer groove 30142 plays a key buffering and transition role, and its groove bottom is in communication with the outlet 3012 on the cover 301 of the filling tank 3. When the additive flows out of the filling tank 3, it first enters the buffer groove 30142 and stays and buffers for a short time in the buffer groove 30142, so that the flow of the additive is more stable, and the problems of pressure fluctuation and unstable flow caused by direct and rapid flow are avoided. The slow-release structure 300 further includes the communication pipe 4, and the communication pipe 4 in the slow-release structure 300 is an important channel connecting the filling tank 3 and the Venturi tube 2. One end of the communication pipe 4 is inserted into the mounting groove 30141, and through the close cooperation with the mounting groove 30141, the sealing between the communication pipe 4 and the mounting boss 3014 is ensured, so as to prevent the leakage of oil and additive at the connection. The other end of the communication pipe 4 penetrates through the liquid inlet pipe section 201 and extends into the throat pipe section 202, and this design enables the additive to be directly and accurately delivered to the throat pipe section 202 of the Venturi tube 2 and fully mixed with the oil flowing at high speed.

[0056] Further, the protective shell 100 of the oil filter is provided with a spring 500, which is installed between the bottom of the filler tank 3 and the inner bottom wall of the protective shell, and is in a compressed state during installation. When the spring 500 is in a compressed state, it generates an upward elastic force. This elastic force precisely acts on the bottom of the filler tank 3, lifting the filler tank 3 upward. In particular, the cover body 301 of the filler tank 3 is provided with a mounting protrusion, which will be tightly connected with the corresponding part on the oil filter element 1 under the pushing of the spring 500 elastic force, thereby ensuring the stable connection of the oil filter element 1 and the mounting protrusion on the filler tank 3. This stable connection is the basis for the normal operation of the oil filter, which enables the smooth and stable flow of oil during the filtration by the filter element and the mixing with additives in the filler tank 3, etc., avoiding problems such as leakage and looseness caused by unstable connection of components. For example, when the engine is running at high speed, the flow and pressure of the oil will increase, which may generate greater impact force on the connection of the oil filter element 1 and the filler tank 3. The elastic properties of the spring 500 enable it to adapt to these mechanical changes. When subjected to a greater impact force, the spring 500 will be further compressed, absorbing part of the energy and acting as a buffer to prevent damage to the connection part due to excessive force. At the same time, when the impact force decreases or disappears, the spring 500 will return to its original state, continuing to maintain the lifting force on the filler tank 3 and ensuring the stability of the connection. This self-adaptive ability enables the oil filter to work stably under various complex working conditions, improving the stability and reliability of its performance. During the production and assembly of the oil filter, the installation of the spring 500 helps to reduce the assembly difficulty and improve the production efficiency. Since the spring 500 can automatically lift the filler tank 3 and press it against the oil filter element 1, the operator does not need to use additional tools or spend a lot of effort to adjust the connection position and force between the components during assembly. Only need to correctly install the spring 500 between the bottom of the filler tank 3 and the inner bottom wall of the protective shell, and then install other components in sequence. This simplified assembly method not only reduces the assembly time and labor cost, but also improves the accuracy and consistency of assembly, ensuring the stable and reliable quality of each oil filter.

[0057] Further, the slow-release structure 300 also includes first connecting ribs 5, one end of each first connecting rib 5 being connected with the outer wall surface of the communication pipe 4, and the other end of each first connecting rib 5 being connected with the inner wall surface of the throat section 202, and a plurality of first connecting ribs 5 being arranged in a circumferential direction at intervals with the axis of the communication pipe 4 as the center. The presence of the first connecting ribs 5 not only realizes the connection function of the communication pipe 4 and the Venturi tube 2, but also tightly integrates the communication pipe 4 and the Venturi tube 2 into an integrated structure. This integrated structure greatly enhances the overall structural strength of the slow-release structure 300, and can resist the impact force, vibration and possible pressure changes generated by the high-speed flow of engine oil during engine operation, thereby ensuring the stability and reliability of the slow-release structure 300 during long-term use, and avoiding problems such as oil leakage or abnormal release of additives due to structural looseness or damage. The presence of the first connecting ribs 5 is like adding a strong support frame between the communication pipe 4 and the Venturi tube 2, which can effectively disperse and withstand these forces, reduce stress concentration of the structure, and reduce the risk of structural damage. This enables the slow-release structure 300 to operate stably for a long time in harsh working environments, greatly prolongs its service life, and reduces maintenance and replacement costs due to structural failure.

[0058] At the same time, the engine oil in the throat section 202 will encounter these circumferentially arranged first connecting ribs 5 during flow. Since there are gaps between the first connecting ribs 5, the engine oil can flow smoothly through the gaps between adjacent two first connecting ribs 5. This special flow path design makes the engine oil no longer flow in a single straight line when flowing through the throat section 202, but will generate turbulent flow under the guidance of the first connecting ribs 5. The formation of turbulent flow can enhance the mixing ability of the engine oil, and make the various components of the engine oil more evenly distributed. In particular for engine oil with additives, turbulent flow can promote the full fusion of additives and engine oil, and avoid the phenomenon of local aggregation or precipitation of additives in the engine oil. In this way, the total alkalinity of the engine oil can be more evenly adjusted, providing more comprehensive and effective corrosion protection for the metal parts inside the engine, and improving the reliability and performance of the engine.

[0059] Further, the slow-release structure 300 also includes a liquid-distributing member 6, which is arranged in the communication pipe 4. The center of the liquid-distributing member 6 is provided with a liquid-distributing hole 601, and the outer edge of the liquid-distributing member 6 is provided with a plurality of second connecting ribs 602, each of which extends radially along the liquid-distributing member 6 and is connected with the inner wall of the communication pipe 4. Enhancing structural stability and reliability: The second connecting ribs 602 firmly connect the liquid-distributing member 6 with the inner wall of the communication pipe 4, forming a stable overall structure. During engine operation, the communication pipe 4 will be subjected to the flow impact force, pressure changes, and vibrations of the engine oil and additives. Without the reinforcement of the second connecting ribs 602, the liquid-distributing member 6 may shake, shift, or even be damaged under the action of the fluid, thereby affecting the uniform release of the additives and the normal operation of the entire slow-release structure 300. However, the presence of the second connecting ribs 602, like a strong "safety belt" added to the liquid-distributing member 6, can effectively disperse and withstand these forces, reduce stress concentration of the liquid-distributing member 6, and reduce the risk of structural damage. This enables the slow-release structure 300 to operate stably for a long time in harsh working environments, greatly improving its structural stability and reliability, and reducing maintenance and replacement costs due to structural failures. Improving the uniformity of additive dispersion: The combination design of the liquid-distributing hole 601 and the gap between the second connecting ribs 602 on the liquid-distributing member 6 provides multiple flow paths for the additives. When the additives enter the communication pipe 4, part of the additives will preferentially pass through the liquid-distributing hole 601 with relatively small resistance, while another part will pass through the gap between the second connecting ribs 602. This flow splitting phenomenon causes the additives to be continuously divided and recombined during the flow process, thereby breaking the initial possible uneven distribution of concentration. With the continuous flow of additives in the communication pipe 4, after multiple flow splitting and mixing, the additives can be more uniformly dispersed in the entire engine oil system. This uniform dispersion is crucial for ensuring the stability of the total base number of the engine oil and effectively avoiding problems such as uneven corrosion of engine parts or differences in lubrication effect caused by excessive or insufficient local additive concentration, providing more comprehensive and reliable protection for the engine. Optimizing fluid dynamics performance: The structure of the second connecting ribs 602 extending radially along the liquid-distributing member 6 and connected with the inner wall of the communication pipe 4 has a positive impact on the fluid dynamics performance in the communication pipe 4. When the mixed fluid of additives and engine oil flows through the liquid-distributing member 6, the second connecting ribs 602 will change the flow direction and velocity distribution of the fluid. The fluid will split and flow around the second connecting ribs 602, generating local turbulence and eddies. These turbulence and eddies can enhance the mixing ability of the fluid and promote the thorough mixing of additives and engine oil. At the same time, the presence of the liquid-distributing hole 601 also provides a relatively stable channel for the fluid, ensuring stable transmission of the fluid in the communication pipe 4 while generating turbulence.Such optimized hydrodynamic performance helps to improve the working efficiency of the slow-release structure 300, reduce energy loss, and ensure that the additives can be released into the engine oil at a predetermined rate and in a predetermined manner.

[0060] Optionally, the design of the liquid homogenizing member 6 has certain flexibility and adjustability. By changing the size, shape of the liquid homogenizing holes 601, and the number, spacing and size of the second connecting ribs 602, etc., the performance of the slow-release structure 300 can be optimized and adjusted according to different engine models, oil types and additive characteristics, without too many limitations here.

[0061] Further, the oil filter further comprises a first annular sealing member 7, which is clamped between the outer wall surface of the mounting boss 3014 and the inner wall surface of the oil filter element 1, forming a reliable sealing barrier. During engine operation, the oil flows under high pressure, and if there are gaps between the mounting boss 3014 and the oil filter element 1, the oil in the dirty side space 102 will leak from these gaps to the clean side space 101, resulting in insufficient filtration of the oil, affecting the lubrication effect of the engine, and possibly contaminating other components around the engine. The first annular sealing member 7, with its good elasticity and sealing performance, can tightly fill the small gaps between the mounting boss 3014 and the oil filter element 1, effectively preventing oil leakage. Even in a high-pressure, high-temperature working environment, the first annular sealing member 7 can maintain its sealing performance, ensuring that the oil flows in the oil filter according to the predetermined path, providing continuous and stable lubrication for the engine.

[0062] Further, the outer wall surface of the mounting boss 3014 is circumferentially provided with a first annular limiting groove 30143, and part of the first annular sealing member 7 is sleeved in the first annular limiting groove 30143. The provision of the first annular limiting groove 30143 is an important measure to improve the installation stability of the first annular sealing member 7. Without the first annular limiting groove 30143, the first annular sealing member 7 may be offset during installation due to improper operation or impact force generated by oil flow, resulting in poor sealing. However, the first annular limiting groove 30143 provides a fixed installation position for the first annular sealing member 7, and during assembly, only part of the first annular sealing member 7 needs to be sleeved into the limiting groove to ensure accurate installation. During engine operation, the flow and vibration of the oil will generate various forces on the first annular sealing member 7, but due to the restraining action of the first annular limiting groove 30143, the first annular sealing member 7 will not easily shift or fall off, and will always remain in the correct sealing position, thereby ensuring the long-term stability of the sealing effect.

[0063] Further, the oil filter further comprises a second annular sealing member 8, the outer wall surface of the communication pipe 4 and the inner wall surface of the mounting groove 30141 are clamped with the second annular sealing member 8, so as to avoid the oil in the clean side space 101 from seeping into the buffer groove through the gap between the communication pipe 4 and the mounting groove 30141. Further, the outer wall surface of the communication pipe 4 is circumferentially provided with a second annular limiting groove 401, and part of the second annular sealing member 8 is sleeved in the second annular limiting groove 401. The second annular limiting groove 401 greatly improves the installation accuracy and stability of the second annular sealing member 8.

[0064] Further, the inner diameter of the inlet 3011 and / or the flow guide pipe 3013 is 0.1-5mm; and / or a one-way valve is arranged in the inlet 3011. The needle pipe or the inlet 3011 with the inner diameter ranging from 0.1mm to 5mm can better realize the delivery and control of the fluid, and ensure the stable flow state of the fluid during delivery. The core function of the one-way valve is to allow the fluid to flow in one direction and prevent the fluid from flowing back in the opposite direction. By arranging the one-way valve in the inlet 3011, it can be ensured that only the oil in the clean side space 101 can flow into the filling tank 3, and the liquid in the filling tank 3 is prevented from flowing back to the clean side space 101.

[0065] Note that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An oil filter, characterized in that, include: Protective housing (100); The filter unit (200) includes an oil filter element (1), which is disposed inside the protective housing (100). The interior of the oil filter element (1) is a clean side space (101), and the exterior of the oil filter element (1) is a dirty side space (102). The slow-release structure (300) includes a venturi tube (2) disposed inside the oil filter element (1). The venturi tube (2) includes an inlet pipe section (201), a throat section (202), and a diffuser section (203) connected in sequence. The oil in the clean side space (101) can flow out of the filter unit (200) in sequence through the inlet pipe section (201), the throat section (202), and the diffuser section (203). The addition unit (400) includes a filling tank (3) filled with additives. The filling tank (3) has an inlet (3011) and an outlet (3012). The inlet (3011) is connected to the clean side space (101), and the outlet (3012) is connected to the throat section (202). A guide pipe (3013) is provided at the outlet (3012), and one end of the guide pipe (3013) extends into the filling tank (3) and is located below the liquid surface of the additives.

2. The oil filter according to claim 1, characterized in that, The filling tank (3) includes a cover (301) and a receiving cavity (302). The cover (301) is sealed and fastened to the receiving cavity (302). The cover (301) and the receiving cavity (302) enclose a liquid storage tank for the additive. The inlet (3011) and the outlet (3012) are both provided on the cover (301). The inlet (3011) and the outlet (3012) are both connected to the liquid storage tank.

3. The oil filter according to claim 2, characterized in that, The cover (301) has a mounting boss (3014) on the side facing the oil filter element (1), and the oil filter element (1) is sleeved on the mounting boss (3014). The mounting boss (3014) has a through mounting groove (30141) and a buffer groove (30142). The bottom of the buffer groove (30142) is connected to the outlet (3012). The slow-release structure (300) further includes: A connecting pipe (4) is inserted into the mounting groove (30141) at one end, and the other end of the connecting pipe (4) passes through the liquid inlet section (201) and extends into the throat section (202).

4. The oil filter according to claim 3, characterized in that, The sustained-release structure (300) also includes: The first connecting rib (5) has one end connected to the outer wall of the connecting pipe (4) and the other end connected to the inner wall of the throat section (202). Several first connecting ribs (5) are arranged circumferentially with the axis of the connecting pipe (4) as the center.

5. The oil filter according to claim 3, characterized in that, The sustained-release structure (300) also includes: A liquid leveling component (6) is disposed inside the connecting pipe (4). A liquid leveling hole (601) is provided at the center of the liquid leveling component (6). A plurality of second connecting ribs (602) are provided on the outer edge of the liquid leveling component (6). Each second connecting rib (602) extends radially along the liquid leveling component (6) and is connected to the inner wall surface of the connecting pipe (4).

6. The oil filter according to claim 3, characterized in that, The oil filter also includes a first annular seal (7), which is sandwiched between the outer wall of the mounting boss (3014) and the inner wall of the oil filter element (1).

7. The oil filter according to claim 6, characterized in that, The outer wall surface of the mounting boss (3014) is provided with a first annular limiting groove (30143) in the circumferential direction, and part of the first annular seal (7) is sleeved in the first annular limiting groove (30143).

8. The oil filter according to claim 3, characterized in that, The oil filter also includes a second annular seal (8), which is sandwiched between the outer wall of the connecting pipe (4) and the inner wall of the mounting groove (30141).

9. The oil filter according to claim 8, characterized in that, The outer wall of the connecting pipe (4) is provided with a second annular limiting groove (401) in the circumferential direction, and part of the second annular sealing element (8) is sleeved in the second annular limiting groove (401).

10. The oil filter according to any one of claims 1-9, characterized in that, The inner diameter of the inlet (3011) and / or the guide tube (3013) is 0.1mm-5mm; and / or A one-way valve is installed inside the inlet (3011).

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