Air filter and cooling system and method

Abstract

The invention discloses an air filter and a cooling system and method.The air filter comprises an inner cavity, the inner cavity is provided with a cooling device, and the cooling device is used for cooling air filtered by the air filter. On the basis that the air filter has the filtering function, the function of cooling the air passing through the air filter is added, and the temperature of the air entering the pressure end of the turbocharger is reduced. The temperature of air entering the pressure end of the turbocharger is reduced, correspondingly, the air density is increased, the efficiency of the turbocharger is improved, and the air inflow of the engine is guaranteed. And under the working conditions of low rotating speed and large torque, the oil injection quantity is increased, air inlet is sufficient, the situation that fuel combustion is insufficient is reduced, output power is improved, the situation that power output is insufficient during sudden acceleration can also be improved, and the driving experience is improved.

Description

Technical Field

[0001] This application relates to the field of engine technology, and in particular to an air filter, cooling system and method. Background Technology

[0002] In high-temperature conditions within the ship's cabin, the temperature of the compressed air supplied to the marine engine via the turbocharger is also high. Higher temperature compressed air has lower density, resulting in a reduced actual intake volume into the engine and decreased turbocharger efficiency. When the cabin temperature exceeds 50°C, the turbocharger's power can be reduced by more than 4%.

[0003] At the same time, when the engine is operating at low speed and high torque, the amount of fuel injected will increase, but the actual amount of air intake will decrease. Insufficient air intake leads to incomplete fuel combustion and insufficient engine power output, which is especially noticeable during sudden acceleration and affects the driving experience.

[0004] Please see Figure 1 and Figure 2 , Figure 1 This is a structural diagram of an air filter in related technologies. Figure 2 This is a schematic diagram of the cooling system of the relevant technology.

[0005] like Figure 2 As shown, the air filter 01, turbocharger 02, and intercooler 04 are connected in series in the direction of air flow. After being filtered by the air filter 01, the air enters the turbocharger 02 for pressurization, then enters the intercooler 04 for cooling, and finally enters the engine cylinders to participate in combustion.

[0006] Continue reading Figure 2 Water pump 03, intercooler 04, and heat exchanger 05 are connected in series in the direction of seawater flow. Water pump 03 pumps seawater into intercooler 04, where it exchanges heat and then enters heat exchanger 05. In intercooler 04, seawater exchanges heat with air, cooling the air; in heat exchanger 05, seawater exchanges heat with the engine's internal cooling water, cooling the internal cooling water.

[0007] In related technologies, the air filter 01 (also known as an air filter) only has a filtering function. It is installed at the pressure end inlet of the turbocharger 02. Its main function is to filter impurities in the fresh air, prevent impurities in the air from entering the turbocharger 02 and damaging the turbine blades of the turbocharger 02, and play a role in protecting the hardware.

[0008] When the cabin temperature is high, the intake air temperature at the pressure end of turbocharger 02 is also high, leading to a decrease in turbocharger 02 efficiency. This results in insufficient intake airflow to the engine, deterioration of in-cylinder combustion, high fuel consumption, and high exhaust temperature, which in turn leads to high exhaust pipe and turbocharger 02 turbine surface temperatures. The heat dissipation from the exhaust pipe and turbocharger 02 turbine further increases the cabin temperature. This cycle continues, and when the ambient temperature reaches a certain level, the power loss of turbocharger 02 will increase dramatically.

[0009] like Figure 3 As shown, under rated operating conditions, when the cabin temperature is below 40℃, the power loss increases with the increase of cabin temperature; when the ambient temperature is above 40℃, the power loss increases exponentially; when the ambient temperature reaches 55℃, the power loss is as high as 3.6%, which has a significant impact on power performance. Especially under low-speed, high-torque conditions, the engine speed is low, the water pump flow rate is small (the water pump is powered by the crankshaft, which transmits power to the water pump impeller via a belt; the water pump speed is positively correlated with the crankshaft speed; when the engine is at low speed, the crankshaft speed is low, and correspondingly, the water pump speed is also low, so the water flow rate is small), and the amount of seawater entering the intercooler is small, resulting in a decrease in the intercooler's cooling efficiency. If the temperature in the cabin is still relatively high, the temperature of the compressed air will also be relatively high after passing through the intercooler. The in-cylinder charging efficiency of the engine will be significantly lower than at other operating conditions. The external characteristic power loss (referring to the difference between the maximum output power (external characteristic curve) of the diesel engine in actual ship operation and the manufacturer's rated power under ideal test bench conditions) will be very obvious. The power will be significantly insufficient during sudden acceleration, resulting in a poor driving experience.

[0010] Therefore, how to reduce the impact of high cabin temperature on the actual air intake of the engine has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0011] This application discloses an air filter to reduce the impact of high cabin temperatures on the actual intake air volume of the engine. This application also discloses a cooling system incorporating the aforementioned air filter, and a cooling method suitable for this cooling system.

[0012] In a first aspect, this application discloses an air filter, including an inner cavity;

[0013] The inner cavity is equipped with a cooling device for cooling the air passing through the air filter.

[0014] Optionally, in the above-described air filter, the cooling device includes at least two fins;

[0015] At least two fins are arranged radially along the circumference of the inner cavity; at least one set of fins is provided along the axial direction of the inner cavity.

[0016] At least some of the fins are provided with coolant channels.

[0017] Optionally, in the above-mentioned air filter, some of the coolant channels of the fins are inlet channels, and some of the coolant channels of the fins are outlet channels, wherein the inlet channels and the outlet channels are connected.

[0018] The fins providing the liquid inlet channel are located on the first side of the axis of the inner cavity, and the fins providing the liquid outlet channel are located on the second side of the axis of the inner cavity. The first side and the second side are opposite to each other, or the fins providing the liquid inlet channel and the fins providing the liquid outlet channel are distributed at intervals in the circumferential direction of the inner cavity.

[0019] Optionally, in the air filter described above, the cooling device further includes a connecting pipe located at one end of the inner cavity along the axial direction, the connecting pipe being used to connect the liquid inlet channel and the liquid outlet channel.

[0020] Optionally, in the above-mentioned air filter, at least some of the liquid inlet channels share a liquid inlet, and / or at least some of the liquid outlet channels share a liquid outlet;

[0021] The diameter of the inlet is greater than or equal to the diameter of the outlet.

[0022] Optionally, the air filter described above further includes a water inlet tank, wherein the water inlet tank is provided with the liquid inlet port, and at least a portion of the liquid inlet channel is in communication with the water inlet tank; and / or,

[0023] It also includes a water outlet tank, on which the drain outlet is provided, and at least part of the drain channel is connected to the water outlet tank.

[0024] Secondly, this application discloses a cooling system including a water pump, an air filter, and an intercooler, wherein the air filter is used to supply filtered air to the compressor of a turbocharger;

[0025] The air filter is the air filter described in any of the above embodiments;

[0026] The inlet of the cooling device of the air filter is connected to the water pump, which pumps coolant into the cooling device of the air filter.

[0027] Optionally, in the above cooling system, the water pump is connected to the intercooler through a first pipeline, and the water pump is connected to the liquid inlet of the cooling device through a second pipeline;

[0028] The water pump is an electronic water pump, and a valve is installed on the second pipeline;

[0029] The valve and the water pump are communicatively connected to the controller. The controller is used to obtain the rotational speed of the water pump based on the flow rate required by the air filter and the flow rate required by the intercooler, and to obtain the opening degree of the valve based on the flow rate ratio of the air filter required to the flow rate of the coolant.

[0030] Optionally, in the above cooling system, the controller is communicatively connected to a first device that detects engine speed and load rate, and the controller is used to obtain the engine coolant flow rate corresponding to the current engine speed and current load rate from a MAP diagram of engine speed, load rate and engine coolant flow rate.

[0031] And / or, the controller is communicatively connected to a second device for detecting the intake temperature of the air filter, the controller is used to obtain the theoretical heat exchange heat based on the intake temperature, the target temperature of the air entering the compressor, the intake flow rate of the air filter and the specific heat capacity of the air, and to obtain the air filter demand flow rate based on the characteristic curve of the theoretical heat exchange heat and the air filter demand flow rate.

[0032] Thirdly, this application also discloses a cooling method applicable to the cooling system described in any of the above embodiments, comprising:

[0033] Coolant is supplied to the intercooler to obtain compressed air that meets the engine's intake air temperature requirements;

[0034] When the air intake temperature of the air filter is higher than the temperature threshold, the coolant is supplied to the cooling device of the air filter to obtain air at the target temperature.

[0035] Optionally, in the above cooling method, coolant is supplied to the intercooler, specifically as follows:

[0036] The water pump delivers the coolant to the intercooler through the first pipeline;

[0037] The coolant is supplied to the cooling device of the air filter, specifically,

[0038] The valve opening on the second pipeline connected in parallel with the first pipeline is adjusted, and the water pump pumps the coolant to the air filter through the second pipeline.

[0039] Optionally, in the above cooling method, adjusting the valve opening of the valve on the second pipeline connected in parallel with the first pipeline specifically involves:

[0040] Based on the MAP diagram of engine speed, load rate and coolant flow rate, obtain the coolant flow rate corresponding to the current engine speed and load rate;

[0041] The theoretical heat exchange heat is obtained based on the intake temperature, the target temperature of the air entering the compressor, the intake flow rate of the air filter, and the specific heat capacity of the air. The required air filter flow rate is obtained based on the characteristic curve of the theoretical heat exchange heat and the required air filter flow rate.

[0042] The water pump speed is obtained based on the sum of the coolant flow rate of the machine body and the required flow rate of the air filter;

[0043] The valve opening degree is obtained based on the flow ratio of the coolant flow rate of the machine body to the required flow rate of the air filter.

[0044] This application provides an air filter, including an inner cavity with a cooling device for cooling the air filtered by the air filter. In addition to its filtering function, the air filter also cools the air entering the turbocharger, reducing the temperature of the air entering the turbocharger's pressure end. The lower air temperature at the turbocharger's pressure end leads to increased air density, increased turbocharger efficiency, and ensured sufficient engine intake. Under low-speed, high-torque conditions, increased fuel injection and ample air intake reduce incomplete combustion, improving power output. It also alleviates insufficient power output during sudden acceleration, enhancing the driving experience.

[0045] This application also discloses a cooling system including a water pump, an air filter, and an intercooler. The air filter is used to supply filtered air to the compressor of a turbocharger. The air filter is any of the air filters described in the above embodiments. Since the air filter has the above-mentioned technical effects, the cooling system with the air filter also has the same technical effects, and will not be described in detail here.

[0046] Thirdly, this application also discloses a cooling method applicable to the cooling system described in any of the above-mentioned solutions. Since the cooling system has the aforementioned technical effects, the cooling method applicable to that cooling system also has the same technical effects, and will not be elaborated further here. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0048] Figure 1 This is a schematic diagram of the structure of an existing air filter;

[0049] Figure 2 This is a schematic diagram of the structure of an existing cooling system;

[0050] Figure 3 It is the curve of power loss as a function of ambient temperature in existing technologies;

[0051] Figure 4 This is a front view of the air filter provided in the embodiment of this application;

[0052] Figure 5 yes Figure 4 A sectional view;

[0053] Figure 6 yes Figure 4 A cross-sectional view from another angle;

[0054] Figure 7 This is a top view of the air filter provided in the embodiment of this application;

[0055] Figure 8 This is a schematic diagram illustrating the connection between the connecting pipe and the fins of the cooling device for an air filter, provided in an embodiment of this application.

[0056] Figure 9 This application provides an embodiment of the cooling device for an air filter, showing the water path of the connecting pipe and the fins.

[0057] Figure 10 This is a schematic diagram showing the connection between the liquid inlet, water tank, liquid outlet, and fins of the cooling device for an air filter provided in an embodiment of this application;

[0058] Figure 11 This application embodiment shows the liquid inlet, water tank, liquid outlet, and water path of the cooling device for the air filter.

[0059] Figure 12 This is a schematic diagram of the cooling system provided in the embodiments of this application.

[0060] in:

[0061] 01-Air filter; 02-Turbocharger; 03-Water pump; 04-Intercooler; 05-Heat exchanger;

[0062] 1-Inner cavity; 2-Cooling device; 21-Fin; 211-Inlet fin; 212-Outlet fin; 22-Connecting pipe; 23-Inlet port; 24-Inlet tank; 25-Outlet tank; 26-Outlet port; 3-Water pump; 4-Intercooler; 5-Air filter; 6-First pipeline; 7-Second pipeline; 8-Valve; 9-Turbocharger. Detailed Implementation

[0063] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0064] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0065] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used in this application are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0066] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0067] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0068] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0069] To address the aforementioned problems, in a first aspect, this application discloses an air filter, including an inner cavity 1. For example... Figures 4-7 As shown, the inner cavity 1 is equipped with a cooling device 2, which is used to cool the air filtered by the air filter 5. The outlet of the air filter 5 is connected to the turbocharger 9 to reduce the temperature of the air entering the turbocharger 9.

[0070] The air filter 5 disclosed in this solution integrates a cooling device 2. In addition to its filtering function, the air filter 5 also has the function of cooling the air passing through it. The filtered and cooled air then enters the pressure end of the turbocharger 9.

[0071] The air temperature entering the pressure end of turbocharger 9 decreases, resulting in increased air density and improved efficiency of turbocharger 9, ensuring sufficient intake air volume for the engine. Under low-speed, high-torque conditions, increased fuel injection ensures ample intake air, reducing incomplete fuel combustion, improving power output, and mitigating insufficient power output during sudden acceleration, thus enhancing the driving experience.

[0072] The air filter 5 disclosed in this application integrates the cooling device 2 into the inner cavity 1 of the air filter 5.

[0073] like Figure 12 As shown, ambient air containing impurities enters the inner cavity 1 of the air filter 5 from the outside in through the filter element. The inner cavity 1 contains clean air. In this embodiment, the inner cavity 1 of the air filter 5 is an exhaust chamber. The exhaust port of the exhaust chamber is connected to the pressure end of the turbocharger 9.

[0074] like Figures 4-7 The inner cavity 1 of the air filter 5 is located at the center of the air filter 5 and is coaxial with the air filter 5.

[0075] The air filter 5 disclosed in this application integrates a cooling device 2 into its inner cavity 1. This cooling device cools the clean air in the clean air exhaust channel, reducing the adhesion of airborne pollutants to the cooling device 2 and minimizing its impact on the heat exchange capacity. The cooling of the clean air in the exhaust channel shortens the path of the cooled air to the pressure end of the turbocharger 9, reducing interference from the external environment.

[0076] Continue reading Figure 5 and Figure 6 The diameter of the exhaust port is slightly smaller than the inner diameter of the inner cavity 1, meaning the diameter of the exhaust port is large enough to reduce the resistance of air exiting the exhaust port and further reduce the interference of the external environment on the cooled air.

[0077] When the air filter 5 disclosed in this application is applied to the cooling system of an engine, the air entering the engine cylinder is cooled twice: once by the air filter 5 before the turbocharger 9, and once by the intercooler 4 after the turbocharger 9.

[0078] In some embodiments of this application, the cooling device 2 includes at least two fins 21. Along the circumference of the inner cavity 1, at least two fins 21 are arranged radially, and the width of the fins 21 is slightly smaller than the radius of the inner cavity 1; along the axial direction of the inner cavity 1, there is at least one set of fins 21.

[0079] In an embodiment where a set of fins 21 is provided along the axial direction of the inner cavity 1, the fins 21 extend from one end of the inner cavity 1 to the other end, and the length of the fins 21 is slightly less than the length of the inner cavity 1 along its own axial direction. In an embodiment where at least two sets of fins 21 are provided along the axial direction of the inner cavity 1, assuming there are N sets of fins 21, the length of each set of fins 21 along the axial direction of the inner cavity 1 is 1 / N the length of the inner cavity along its own axial direction. The N sets of fins 21 can be of equal length or unequal length.

[0080] At least a portion of the fins 21 are provided with coolant channels. Coolant flows into the coolant channels and exchanges heat with the air through the fins 21.

[0081] In some other embodiments of this application, the cooling device 2 is a spiral tube, which is wound around the axis of the inner cavity 1; there is a gap between two adjacent spirals of the spiral tube to reduce the resistance of air passing through the spiral tube; the spiral tube has at least one layer along the radial direction of the inner cavity 1, and when the spiral tube has at least two layers, the spirals of two adjacent spiral tubes are staggered in the axial direction of the inner cavity 1.

[0082] The structure of the cooling device 2 is not limited to the above embodiment. It can also be other structures that can cool the air without increasing air resistance, and all of them are within the protection scope of this application.

[0083] Please see Figures 8-11 This is an embodiment of a cooling device 2 comprising at least two fins 21. The length of the fin 21 is the dimension between the two ends of the fin 21 along the axial direction of the inner cavity 1. The length direction of the fin 21 may be consistent with the axial direction of the inner cavity 1 or may deviate from the axial direction of the inner cavity 1 at a certain angle. The width of the fin 21 is the dimension of the fin 21 from the center of the inner cavity 1 to the cavity wall of the inner cavity 1. The width direction of the fin 21 may be consistent with the radial direction of the inner cavity 1 or may deviate from the radial direction of the inner cavity 1 at a certain angle.

[0084] At least two fins 21 divide the cylindrical space of the inner cavity 1 into multiple fan-shaped spaces. Clean air entering the inner cavity 1 from the outside in enters the corresponding fan-shaped space and is cooled by the fins 21 surrounding the fan-shaped space. One fin 21 can cool the air in the fan-shaped spaces located on both sides of the fin 21. In this embodiment, the orientation of the fins 21 is similar to the direction of air entering and exiting the inner cavity 1, reducing interference with airflow.

[0085] The design of fin 21 provides a basis for setting up coolant channels and increases the heat exchange area of ​​cooling device 2.

[0086] Optionally, each fin 21 has a coolant channel. The coolant channel includes an inlet channel and a drain channel. In some embodiments, each fin 21 may have both an inlet channel and a drain channel, that is, a fin 21 may have both an inlet channel and a drain channel simultaneously. In other embodiments, each fin 21 may have only an inlet channel or a drain channel, that is, a fin 21 may have only one type of channel.

[0087] In embodiments where only an inlet channel or a outlet channel is provided on each fin 21, the fin 21 with the inlet channel is named inlet fin 211, and the fin 21 with the outlet channel is named outlet fin 212, with the inlet channel and outlet channel connected. Optionally, as... Figures 8-11 As shown, the liquid inlet fin 211 is located on the first side of the axis of the inner cavity 1, and the liquid outlet fin 212 is located on the second side of the axis of the inner cavity 1. The first side and the second side are opposite to each other. The number of liquid inlet fins 211 and liquid outlet fins 212 may be equal or unequal. Alternatively, the liquid inlet fins 211 and liquid outlet fins 212 are arranged at intervals in the circumferential direction of the inner cavity 1. The number of liquid inlet fins 211 and liquid outlet fins 212 may be equal or unequal.

[0088] The liquid inlet channel is connected to the liquid outlet channel. Optionally, the cooling device 2 further includes a connecting pipe 22, which is used to connect the liquid inlet channel and the liquid outlet channel; at least a portion of the liquid inlet channel is connected to the connecting pipe 22, and at least a portion of the liquid outlet channel is connected to the connecting pipe 22.

[0089] At least part of the liquid inlet channel and at least part of the liquid outlet channel are connected by the same connecting pipe 22, which can reduce the number of connecting pipes 22 to a certain extent and simplify the structure of the cooling device 2.

[0090] In this embodiment, the connecting pipe 22 not only connects the liquid inlet channel and the liquid outlet channel, but also serves to fix the fins 21. Please refer to... Figures 8-11 The end of the fin 21 away from the liquid inlet is fixed in position by the connecting pipe 22.

[0091] Continue reading Figures 8-11 All inlet channels and all outlet channels are connected to the connecting pipe 22, thus connecting all inlet and outlet channels through a single connecting pipe 22. The connecting pipe 22 is arc-shaped and connects to both inlet and outlet channels. The connecting pipe 22 is located on the outer edge of the circumference of the multiple fins 21.

[0092] Coolant entering different inlet channels converges into connecting pipe 22, and is then distributed to different drain channels via connecting pipe 22. Please refer to [link / reference]. Figure 9 and Figure 11 It depicts the water path of the coolant within the cooling device.

[0093] The number of connecting pipes 22 can also be multiple. For example, one of the liquid inlet channels is connected to one of the liquid outlet channels through a connecting pipe 22; or, some of the liquid inlet channels are connected to some of the liquid outlet channels through a connecting pipe 22, and the remaining liquid inlet channels are connected to the remaining liquid outlet channels through another connecting pipe 22 or a connecting structure other than the connecting pipe 22.

[0094] At least some of the liquid inlet channels share a single liquid inlet 23, and at least some of the liquid outlet channels share a single liquid outlet 26, thereby reducing the number of liquid inlets 23 and liquid outlets 26 and simplifying the structure of the cooling device 2.

[0095] In an embodiment where the liquid inlet fins 211 and the liquid outlet fins 212 are arranged opposite each other on both sides of the axis of the inner cavity 1, the cooling device 2 disclosed in this application further includes a water inlet tank 24 and / or a water outlet tank 25, with a liquid inlet 23 provided on the water inlet tank 24 and a liquid outlet 26 provided on the water outlet tank 25.

[0096] Please see Figures 8-11 In an embodiment where the cooling device 2 includes an inlet tank 24 and an outlet tank 25, the inlet tank 24 and the outlet tank 25 are located on the same side of the cavity along its own axis. Correspondingly, the liquid inlet 23 and the liquid outlet 26 are also located on the same side of the cavity. The inlet tank 24 and the outlet tank 25 are located at opposite ends of the connecting pipe 22 along the axis of the inner cavity 1.

[0097] The inlet tank 24 is provided with an inlet port 23, and the outlet tank 25 is provided with a drain port 26. The coolant enters the inlet tank 24 through the inlet port 23, and then is distributed through the inlet tank 24 into the inlet channels of at least two fins 21 that are connected to the inlet tank 24. Next, it enters the connecting pipe 22, and then is distributed through the connecting pipe 22 into the drain channels of at least two fins 21. Finally, it is discharged through the drain port 26.

[0098] Multiple fins 21 are radially distributed to cool different locations around the inner cavity. Optionally, the different fins 21 have the same shape and size, and their heat exchange capacity is comparable. The coolant moves downward and then upward within the cooling device 2, achieving cooling of different locations along the axis of the inner cavity 1. The coolant enters the connecting pipe 22 under gravity, and then enters the drain channel under water pressure. The flow of coolant in the inlet and outlet channels has a certain resistance, ensuring that the coolant can fill the inlet and outlet channels, thus optimizing the cooling effect.

[0099] Continue reading Figure 8 The water inlet tank 24 is fan-shaped and connected to at least two fins 21. The water inlet tank 24 serves two purposes: firstly, it distributes coolant to the inlet channels of different fins 21; secondly, it connects the different fins 21, enhancing the internal stability of the cooling structure. The water inlet tank 24 covers the end face of the inner cavity from the center to the edge, ensuring the volume of the water inlet tank 24 and thus guaranteeing its ability to supply coolant to the connected inlet channels.

[0100] Continue reading Figure 8 The outlet tank 25 is arc-shaped and connects to at least two drainage channels. The outlet tank 25 serves two purposes: firstly, it collects coolant from the drainage channels of different fins 21; secondly, it connects different fins 21, enhancing the internal stability of the cooling structure. The outlet tank 25 is positioned close to the center of the inner cavity to achieve connectivity with as many drainage channels as possible within a short length. The volume of the outlet tank 25 is sufficiently small to maximize drainage resistance and ensure adequate heat exchange of the coolant.

[0101] The volume of the inlet tank 24 is larger than that of the outlet tank 25, ensuring smoother water intake through different inlet channels; at the same time, the volume of the outlet tank 25 is reduced, which increases the resistance of the coolant, so that the coolant can fill all the fins 21 and enhance the cooling effect.

[0102] Optionally, the diameter of the inlet 23 is greater than or equal to the diameter of the outlet 26.

[0103] The coolant channels (a collective term for inlet and outlet channels) can have various shapes. In some embodiments, the coolant channels are straight, and the width of the coolant channels is slightly smaller than the width of the fins 21; in other embodiments, the coolant channels are serpentine, and the coolant channels bend along the width or length direction of the fins 21.

[0104] The arrangement of the fins 21 of the cooling device 2 is not limited to the above embodiment. They can also be arranged side by side along the radial direction of the inner cavity 1. In this embodiment, the length direction of the fins 21 is parallel to the axial direction of the inner cavity 1.

[0105] Alternatively, the fins 21 may be made of a material with high heat exchange capacity, such as aluminum alloy or iron.

[0106] The fin 21 can be flat, wavy, or arc-shaped, etc.

[0107] Optionally, the coolant in cooling device 2 is seawater. Since the engine is used at sea, seawater can be used nearby to cool the air passing through air filter 5, resulting in low cost.

[0108] Secondly, this application also discloses a cooling system, such as Figure 12 As shown, it includes a water pump 3, an air filter 5, and an intercooler 4. The air filter 5 is used to supply filtered air to the compressor of the turbocharger 9.

[0109] Air filter 5 is the air filter described in any of the above solutions. Since air filter 5 has the above-mentioned technical effects, the cooling system with air filter 5 also has the same technical effects, which will not be described in detail here.

[0110] The inlet 23 of the cooling device 2 of the air filter 5 is connected to the water pump 3, which pumps coolant into the cooling device 2 of the air filter 5. Optionally, the coolant can be seawater, which is locally sourced and reduces costs.

[0111] In some embodiments, the liquid inlet of the intercooler 4 and the liquid inlet 23 of the cooling device 2 of the air filter 5 are both connected to their respective water pumps 3. The two water pumps 3 pump seawater to the intercooler 4 and the cooling device 2 of the air filter 5, respectively. Optionally, the water pump 3 connected to the cooling device 2 of the air filter 5 and / or the water pump 3 connected to the liquid inlet of the intercooler 4 are electric water pumps, whose speed can be adjusted according to cooling requirements.

[0112] In other embodiments, the intercooler 4 and the air filter 5 share the same cooling device 2, namely the water pump 3. Figure 12 As shown, water pump 3 is connected to intercooler 4 via first pipe 6, and water pump 3 is connected to cooling device 2 via second pipe 7. Water pump 3 pumps seawater to intercooler 4 and cooling device 2 of air filter 5 simultaneously via the parallel first pipe 6 and second pipe 7.

[0113] In the embodiment where the cooling device 2 for the intercooler 4 and the air filter 5 shares a water pump 3, the water pump 3 is an electronic water pump, and a valve 8 is installed on the second pipeline 7. Both the water pump 3 and the valve 8 are communicatively connected to a controller, which is used to adjust the speed of the water pump 3 and the opening degree of the valve 8.

[0114] Specifically, the controller is used to obtain the speed of the water pump 3 based on the flow rate of the air filter 5 and the flow rate of the intercooler 4, and to obtain the opening degree of the valve 8 based on the flow rate ratio of the air filter demand flow rate to the flow rate of the engine coolant.

[0115] The intake air temperature of air filter 5 is obtained, which is the ambient temperature, and compared with a temperature threshold. The temperature threshold is designed by those skilled in the art based on actual needs.

[0116] If the intake air temperature does not exceed the temperature threshold, valve 8 will not open. At this time, water pump 3 will only supply coolant to intercooler 4, and the pumping flow rate of water pump 3 will be the same as the coolant flow rate of intercooler 4. If the intake air temperature exceeds the temperature threshold, valve 8 will open, and water pump 3 will pump seawater to the intercooler 4 and the cooling device 2 of air filter 5 through the first pipe 6 and the second pipe 7, respectively. The pumping flow rate of water pump 3 will be the sum of the coolant flow rate of intercooler 4 and the required flow rate of air filter.

[0117] It should be noted that the cooling flow rate of intercooler 4 is the same as the engine block coolant flow rate, therefore the engine block coolant flow rate is the coolant flow rate passing through intercooler 4.

[0118] The controller is communicatively connected to a second device for detecting the intake air temperature of the air filter 5. The controller obtains the air filter demand flow rate of the air filter 5 based on the temperature difference between the ambient temperature and the target temperature of the air entering the compressor.

[0119] The controller determines the required airflow rate for air filter 5 based on the temperature difference between the ambient temperature and the target temperature of the air entering the compressor. Specifically,

[0120] The temperature difference between the intake air temperature and the target temperature is calculated as: ambient temperature - target temperature = temperature difference.

[0121] The theoretical heat exchange heat is obtained based on the temperature difference, the air intake flow rate of air filter 5, and the specific heat capacity of air. The air filter demand flow rate is obtained based on the characteristic curve (curve) of the theoretical heat exchange heat and the air filter demand flow rate.

[0122] The controller is connected in communication with the first device that detects engine speed and load rate. The controller obtains the coolant flow rate of the engine body based on the engine speed and load rate.

[0123] The controller obtains the engine coolant flow rate based on engine speed and load rate, specifically:

[0124] Based on the MAP (also known as the universal characteristic diagram or lookup table) of engine speed, load rate, and coolant flow rate, the coolant flow rate at the current engine speed and load rate can be obtained.

[0125] The horizontal axis of the MAP chart represents engine speed, the vertical axis represents load rate, and the table lookup value represents engine coolant flow rate.

[0126] The sum of the air filter's required flow rate and the engine coolant flow rate is the coolant flow rate that the water pump needs to deliver. The water pump speed is adjusted according to the coolant flow rate.

[0127] Based on the air filter demand flow rate and the engine coolant flow rate, the flow ratio of the air filter demand flow rate to the engine coolant flow rate is obtained. The valve opening is obtained based on the characteristic curve (curve for short) of the flow ratio and valve opening.

[0128] The higher the speed of water pump 3, the greater the flow rate. The higher the intake air temperature, the higher the speed of water pump 3, so as to provide more seawater for cooling the air to the cooling device 2 of air filter 5 and intercooler 4.

[0129] In this solution, the speed of water pump 3 is controlled by a controller. Compared with the crankshaft-driven method of water pump 3 in related technologies, the speed of water pump 3 in this solution is not affected by the engine operating conditions. The speed of water pump 3 can be adjusted according to the cooling requirements of the air, which is more flexible.

[0130] The cooling system disclosed in this application can adjust the speed of the water pump 3 and the opening of the valve 8 according to the flow rate of the air filter and the coolant flow rate of the engine block, as well as the flow rate ratio of the air filter demand flow rate to the coolant flow rate of the engine block, to meet the cooling needs of both the air filter 5 and the intercooler 4. This improves the automation, intelligence, and flexibility of temperature regulation.

[0131] In this embodiment, valve 8 can be installed only on the second pipeline 7, and intercooler 4 is always connected to water pump 3 through the first pipeline 6 so that intercooler 4 can always maintain good cooling capacity.

[0132] Thirdly, this application also discloses a cooling method applicable to the cooling system described in any of the above-mentioned solutions. Since the cooling system has the aforementioned technical effects, the cooling method applicable to that cooling system also has the same technical effects, and will not be elaborated further here.

[0133] The cooling methods disclosed in this solution include:

[0134] Coolant is supplied to the intercooler 4 to obtain compressed air that meets the engine intake temperature requirements;

[0135] When the intake air temperature of the air filter 5 is higher than the temperature threshold, coolant is supplied to the cooling device 2 of the air filter 5 to obtain air at the target temperature.

[0136] When the intake air temperature does not exceed the temperature threshold, seawater is not pumped into the cooling device 2 of the air filter 5. At this time, the cooling device 2 does not cool the air passing through the air filter 5.

[0137] The water pump 3 disclosed in this solution will only pump seawater to the cooling device 2 of the air filter 5 when the air needs to be cooled by the cooling device 2. When the air does not need to be cooled by the cooling device 2, seawater will not be pumped to the cooling device 2 of the air filter 5, so as to reduce the energy consumption of the water pump 3.

[0138] Coolant is supplied to intercooler 4, specifically as follows:

[0139] Water pump 3 pumps coolant to intercooler 4 through first pipeline 6;

[0140] Coolant is supplied to the cooling device 2 of the air filter 5, specifically,

[0141] Adjust the valve opening of valve 8 on the second pipeline 7, which is connected in parallel with the first pipeline 6, and pump water pump 3 to pump coolant to air filter 5 through the second pipeline 7.

[0142] In this embodiment, the intercooler 4 and the air filter 5 share the same water pump 3 for their cooling devices 2. Figure 12 As shown, water pump 3 is connected to intercooler 4 via first pipe 6, and water pump 3 is connected to cooling device 2 via second pipe 7. Water pump 3 pumps seawater to intercooler 4 and cooling device 2 of air filter 5 simultaneously via the parallel first pipe 6 and second pipe 7.

[0143] Before the water pump 3 pumps coolant to the air filter 5 through the second pipeline 7, the opening of the valve 8 needs to be adjusted to ensure the cooling requirements of the air filter 5 and to allow for flexibility in adjusting the cooling capacity of the air filter 5.

[0144] Water pump 3 is an electronic water pump.

[0145] Adjust the valve opening of valve 8 on the second pipeline 7, which is connected in parallel with the first pipeline 6, specifically as follows:

[0146] The intercooler's body coolant flow rate is obtained based on the engine speed and load rate. Specifically, the body coolant flow rate at the current engine speed and load rate is obtained based on the MAP diagram of engine speed, load rate, and body coolant flow rate.

[0147] The air filter demand flow rate of air filter 5 is obtained based on the temperature difference between the intake air temperature and the target temperature of the air entering the compressor. Specifically, the theoretical heat exchange heat is obtained based on the temperature difference, the intake air flow rate of air filter 5 and the specific heat capacity of air. The air filter demand flow rate is obtained based on the characteristic curve (curve for short) of theoretical heat exchange heat and air filter demand flow rate.

[0148] The rotational speed of water pump 3 is obtained based on the sum of the coolant flow rate and the air filter flow rate.

[0149] The opening degree of valve 8 is determined based on the flow ratio of the coolant flow rate to the air filter flow rate.

[0150] The cooling system disclosed in this application can adjust the speed of the water pump 3 and the opening of the valve 8 according to the flow rate of the air filter and the coolant flow rate of the engine block, as well as the flow rate ratio of the air filter demand flow rate to the coolant flow rate of the engine block, to meet the cooling needs of both the air filter 5 and the intercooler 4. This improves the automation, intelligence, and flexibility of temperature regulation.

[0151] The cooling method disclosed in this solution can adjust the cooling capacity of the cooling device 2 of the air filter 5, thereby improving the automation, intelligence and flexibility of temperature regulation.

[0152] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An air filter, characterized in that, Including the inner cavity (1); The inner cavity (1) is provided with a cooling device (2), which is used to cool the air passing through the air filter (5).

2. The air filter according to claim 1, characterized in that, The cooling device (2) includes at least two fins (21); Along the circumference of the inner cavity (1), at least two of the fins (21) are arranged radially; along the axial direction of the inner cavity (1), there is at least one set of the fins (21). At least some of the fins (21) are provided with coolant channels.

3. The air filter according to claim 2, characterized in that, Some of the coolant channels of the fins (21) are inlet channels, and some of the coolant channels of the fins (21) are outlet channels, and the inlet channels and outlet channels are connected. The fin (21) that provides the liquid inlet channel is located on the first side of the axis of the inner cavity (1), and the fin (21) that provides the liquid outlet channel is located on the second side of the axis of the inner cavity (1). The first side and the second side are opposite to each other, or the fin (21) that provides the liquid inlet channel and the fin (21) that provides the liquid outlet channel are distributed at intervals in the circumferential direction of the inner cavity (1).

4. The air filter according to claim 3, characterized in that, The cooling device (2) further includes a connecting pipe (22), which is located at one end of the inner cavity (1) along the axial direction. The connecting pipe (22) is used to connect the liquid inlet channel and the liquid outlet channel.

5. The air filter according to claim 3 or 4, characterized in that, At least some of the liquid inlet channels share a single liquid inlet (23), and / or at least some of the liquid outlet channels share a single liquid outlet (26). The diameter of the inlet (23) is greater than or equal to the diameter of the outlet (26).

6. The air filter according to claim 5, characterized in that, It also includes a water inlet tank (24), on which the liquid inlet (23) is provided, and at least a portion of the liquid inlet channel is connected to the water inlet tank (24); and / or, It also includes a water outlet tank (25), on which the drain outlet (26) is provided, and at least part of the drain channel is connected to the water outlet tank (25).

7. A cooling system, characterized in that, Includes a water pump (3), an air filter (5) and an intercooler (4), wherein the air filter (5) is used to supply filtered air to the compressor of the turbocharger (9); The air filter (5) is the air filter according to any one of claims 1-6; The inlet (23) of the cooling device (2) of the air filter (5) is connected to the water pump (3), which is used to pump coolant to the cooling device (2) of the air filter (5).

8. The cooling system according to claim 7, characterized in that, The water pump (3) is connected to the intercooler (4) through the first pipeline (6), and the water pump (3) is connected to the liquid inlet (23) of the cooling device (2) through the second pipeline (7); The water pump (3) is an electronic water pump, and a valve (8) is installed on the second pipeline (7); The valve (8) and the water pump (3) are connected in communication with the controller. The controller is used to obtain the speed of the water pump (3) based on the flow rate of the air filter (5) and the flow rate of the body coolant required by the intercooler (4), and to obtain the opening degree of the valve (8) based on the flow rate ratio of the air filter demand flow rate to the body coolant flow rate.

9. The cooling system according to claim 8, characterized in that, The controller is communicatively connected to a first device that detects engine speed and load rate. The controller is used to obtain the engine coolant flow rate corresponding to the current engine speed and current load rate based on a MAP diagram of engine speed, load rate and engine coolant flow rate. And / or, the controller is communicatively connected to a second device for detecting the intake temperature of the air filter (5), the controller is used to obtain the theoretical heat exchange heat based on the intake temperature, the target temperature of the air entering the compressor, the intake flow rate of the air filter and the specific heat capacity of the air, and to obtain the air filter demand flow rate based on the characteristic curve of the theoretical heat exchange heat and the air filter demand flow rate.

10. A cooling method, characterized in that, The cooling system applicable to any one of claims 7-9 comprises: Coolant is supplied to the intercooler (4) to obtain compressed air that meets the engine intake temperature requirements; When the intake temperature of the air filter (5) is higher than the temperature threshold, the coolant is supplied to the cooling device (2) of the air filter (5) to obtain air at the target temperature.

11. The cooling method according to claim 10, characterized in that, Coolant is supplied to the intercooler (4), specifically, The water pump (3) pumps the coolant to the intercooler (4) through the first pipeline (6); The coolant is supplied to the cooling device (2) of the air filter (5), specifically, Adjust the valve opening of the valve (8) on the second pipeline (7) connected in parallel with the first pipeline (6), and the water pump (3) pumps the coolant to the air filter (5) through the second pipeline (7).

12. The cooling method according to claim 11, characterized in that, Adjust the valve opening of the valve (8) on the second pipeline (7) connected in parallel with the first pipeline (6), specifically, Based on the MAP diagram of engine speed, load rate and coolant flow rate, obtain the coolant flow rate corresponding to the current engine speed and load rate; The theoretical heat exchange heat is obtained based on the intake temperature, the target temperature of the air entering the compressor, the intake flow rate of the air filter (5) and the specific heat capacity of the air, and the required air filter flow rate of the air filter (5) is obtained based on the characteristic curve of the theoretical heat exchange heat and the required air filter flow rate. The rotational speed of the water pump (3) is obtained based on the sum of the flow rate of the coolant in the machine body and the required flow rate of the air filter; The opening degree of valve (8) is obtained based on the ratio of the flow rate of the coolant in the machine body to the flow rate required by the air filter.

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