69results about How to "Small flow resistance" patented technology

The invention discloses a fuel cell bipolar plate structure with a heat dissipation fin array, and particularly relates to the field of cell bipolar plates, the fuel cell bipolar plate structure comprises a cathode plate, an anode plate is arranged on one side of the cathode plate, a membrane electrode is arranged between the cathode plate and the anode plate, an air gas cavity is arranged on the surface of one side, close to the membrane electrode, of the cathode plate, and the heat dissipation fin array is arranged in the air gas cavity. An air flow channel is formed in the inner wall of the air gas cavity, a hydrogen gas cavity is formed in the inner wall of one side of the anode plate, a hydrogen flow channel is formed in the inner wall of the hydrogen gas cavity, a cooling water flow channel is formed between the cathode plate and the anode plate, and a reinforced heat dissipation mechanism is arranged in the cooling water flow channel; the flow channel can be shortened through the flow dividing air flow channel, the path of gas from the inlet to the outlet is more average, the multi-gradient auxiliary enhanced heat dissipation effect is achieved through the enhanced heat dissipation mechanism on the inner wall of the cooling water flow channel, the enhanced heat dissipation effect can be assisted, and therefore huge heat generated by electrochemical reaction of the cathode and the anode can be taken away.

The invention discloses a micromotor-driven distributed turbulent flow pumpless liquid cooling device for space thermal control. The micromotor-driven distributed turbulent flow pumpless liquid cooling device comprises a pipeline body and an impeller pump, the impeller pump comprises an impeller with the outer diameter being D and capable of actively rotating. When the impeller pump is used for overall heat dissipation of a single small-size electronic element, one impeller pump is arranged in the cooling flow channel at the position 0.5 D-1. 5D away from the upstream of the small-size electronic element; when the impeller pump is used for eliminating the hot spots of the large-size electronic element, one impeller pump is arranged in the cooling flow channel at the position 0.5 D-1. 5D away from the upstream of each hot spot to be eliminated. An external pump is removed, and the impeller pump is arranged in the cooling flow channel, so that on one hand, a cooling working medium is pumped, on the other hand, a turbulent flow effect is achieved on the cooling working medium, a boundary layer is broken, and the heat dissipation effect is improved. In addition, for a large-scale heat dissipation scene, a plurality of impeller pumps can be arranged in the cooling flow channel in an array mode, the impeller pumps can be placed at local hot spots in a targeted mode, targeted heat dissipation is achieved, and the heat dissipation efficiency and uniformity are further improved.

The utility model provides a kind of etching cavity for realizing process gas quick switching, and etching cavity includes plasma source chamber and reaction chamber, and the upper surface of reaction chamber is equipped with the gas inlet of process gas;Quick gas replacement device includes the gas pipeline, gas control assembly and gas inlet pipeline that are sequentially communicated along process gas gas inlet direction;Gas pipeline is communicated with process gas gas source, and gas inlet pipeline is communicated with gas inlet;Gas control assembly includes the input, gas inlet valve, flow controller, process gas branch and output that are sequentially communicated along process gas gas inlet direction;Input is communicated with gas pipeline, and output is communicated with gas inlet pipeline;Gas control assembly is also equipped with fixed plate, and fixed plate is installed in plasma source chamber, and the input, gas inlet valve, flow controller, process gas branch and output are sequentially installed in the fixed plate.The utility model solves the problem that deposition gas and etching gas are difficult to quickly switch and accurately control in quick alternate process.

The utility model relates to a hydrogen fuel cell ejector and steam-water separator integrated structure which comprises a shell, a snakelike coil pipe serving as an ejector pipeline is arranged in the shell, the snakelike coil pipe is provided with four vertical sections formed by vertically bending towards the interior of the shell, and the four vertical sections form a water baffle for realizing steam-water separation. One end of the snakelike coil pipe is communicated with fluid in the hydrogen storage tank, the other end of the snakelike coil pipe is connected with a nozzle for spraying the fluid into a hydrogen reactor, the steam-water separator and the ejector are integrated, and the snakelike coil pipe serving as an ejector pipeline is also used as a baffle in a traditional steam-water separator, so that steam-water separation is realized; the overall structure of the system is more compact; fluid heat in the steam-water separator is used for heating the ejector, the heat utilization efficiency of the system is also improved, and compared with a traditional pipeline connection mode, the flow resistance of fluid in the process of flowing from the steam-water separator to the ejector is reduced.

This invention relates to the technical field of valves, and in particular to a master ball valve, which improves the sealing performance, high temperature and high pressure resistance, and reduces flow resistance by using a ball valve core and triple locking; it includes an active valve and a passive valve, which cooperate with each other to seal and transport or stop the transport of materials; the passive valve is installed on the active valve.

The application discloses a double-layer liquid cooling system, which comprises a first layer of liquid cooling plates; a second layer of liquid cooling plates arranged above the first layer of liquid cooling plates; at least two inlets arranged on the second layer of liquid cooling plates, cooling liquid in the first layer of liquid cooling plates being transported to the second layer of liquid cooling plates from the inlets; an outlet arranged on the second layer of liquid cooling plates, the number of the outlet being at least one but less than that of the inlets, cooling liquid in the second layer of liquid cooling plates being transported to the first layer of liquid cooling plates from the outlet; the cooling liquid flows from the first layer of liquid cooling plates to the second layer of liquid cooling plates and then flows back to the first layer of liquid cooling plates from the second layer of liquid cooling plates; and the second layer of battery modules is the farthest end module (farthest from the cooling liquid inlet of the first layer of liquid cooling plates), the number of the inlets arranged on the second layer of liquid cooling plates is increased, the flow of the cooling liquid into the second layer of liquid cooling plates is increased, heat exchange of the second layer of liquid cooling plates and the second layer of battery modules is improved, and the temperature difference of the whole package is reduced.

This utility model relates to a stator-rotor assembly and a powder-liquid mixing device. A stator-rotor assembly includes at least one stator and at least one rotor, the rotor rotating relative to the stator to shear the material flowing through the assembly. The structure of a single stator includes a first disc with several flow holes along the circumference on its end face for material flow. The structure of a single rotor includes a second disc with several notches along the circumference on its end face for material flow; each notch is hollowed out, thus forming independent blades between adjacent notches. By configuring the stator and rotor, the shearing consistency of the stator-rotor assembly on the material can be improved, thereby increasing the dispersion efficiency; simultaneously, the small overlap area between the stator and rotor reduces the heat generation of the stator-rotor assembly.

The invention discloses a longitudinal tube bundle type spray pipe extension section which comprises a conical barrel structure formed by arranging and connecting a plurality of longitudinal pipes in the circumferential direction. The inlet flange, the inlet collector ring, the small-end base plate and the outer wall of the conical barrel structure are closed to form an inlet collector cavity; the outlet collector ring is of an annular structure with an opening in the inner wall, and the opening position of the outlet collector ring is fixedly connected with the outer wall of the rear end area of the conical barrel structure through a large-end base plate; the outlet collector ring, the large-end base plate and the outer wall of the conical barrel structure are closed to form an outlet collector cavity; a radial inflow hole and a radial outflow hole are formed in the outer wall of the longitudinal pipe; the radial inflow hole is positioned in the inlet collector cavity; the radial outflow hole is positioned in the outlet collector cavity; coolant circulates in the longitudinal pipe serving as a cooling channel. The engine is simple in structural form, light in weight, small in flow resistance and capable of being used as a liquid rocket engine.

The utility model relates to the technical field of internal combustion engines, and particularly discloses a low-resistance internal combustion engine impedance composite silencer which comprises a protection plate, an inlet, an outlet and a composite silencing assembly. The inlet and the outlet are formed in the two ends of the protection plate, and the composite silencing assembly is arranged in the protection plate. The inner penetrating pipe is detachably connected based on an inlet and an outlet, the first-stage resistant cavities are symmetrically arranged on the periphery of the inner penetrating pipe, a second-stage resistant cavity and a sound absorption cotton cavity are formed between the first-stage resistant cavities and the protection plate, the first-stage resistant cavities are symmetrically arranged based on the center line of the second-stage resistant cavity, and the second-stage resistant cavities are symmetrically arranged based on the center line of the second-stage resistant cavity. A plurality of penetrating holes for gas to enter the first-stage resistant cavity, the second-stage resistant cavity and the sound absorption cotton cavity are formed in the inner penetrating pipe, and the volume of the cavity in the first-stage resistant cavity is smaller than that of the cavity in the second-stage resistant cavity.

The utility model relates to valve technical field, and disclose a kind of pressure reducing type backflow preventer, including valve body, drain valve seat, drain valve flap, long valve rod, fixed screw, valve cover, the valve body is provided with drain valve seat, the drain valve seat inside is provided with drain valve flap, the drain valve flap upper side is provided with long valve rod, the valve body upper side is provided with valve cover.The pressure reducing type backflow preventer, by first valve seat, first valve flap, first main valve rod, first spring seat, first spring and first hexagon nut are assembled to it before being loaded into valve body, subsequent and present an integral loading into valve body inside, greatly shorten assembly time, also suitable for the assembly in the valve body of smaller volume, the unique flow passage design of two-stage check valve, small flow resistance, open and close speed is fast, can effectively prevent the damage of sudden back pressure rise to valve and pipeline, limit pressure water backflow or siphon backflow, with mute function, effectively prolong the service life of valve.

The invention discloses a temperature adjusting system which comprises a vortex tube refrigerating assembly, a heater, a temperature control environment box, a heat regenerator and a gas pipeline. A first flow path and a second flow path are arranged on the gas pipeline in parallel, the first flow path is directly communicated with the gas inlet end and the gas outlet end of the gas pipeline, the second flow path is arranged in the heat regenerator in a penetrating mode, and a valve set for controlling the first flow path and the second flow path to be connected and disconnected is arranged on the gas pipeline. A parallel double-flow-path structure capable of being mechanically switched is innovatively arranged in a gas pipeline, so that the system can be flexibly selected between two efficient working modes: when a first flow path is selected, gas of a gas source directly enters a temperature adjusting unit, and the system runs at the maximum cooling rate; when the second flow path is selected, the gas firstly flows through the heat regenerator, exchanges heat with low-temperature exhaust gas from the temperature control environment box to be pre-cooled, and then enters the temperature adjusting unit, so that the refrigeration temperature limit is broken through on the premise that the gas source load is not increased, and the energy efficiency is improved.

This application relates to a heat exchanger and a thermal management system. The heat exchanger includes a flow guide plate with first flow guide grooves. Adjacent first flow guide grooves form multiple flow splitting gaps. The first flow guide groove is formed by either a straight groove segment or a curved groove segment alone, or by alternating arrangements of both. The straight groove segment includes multiple staggered channels connected sequentially along its own centerline, with adjacent staggered channels arranged in a direction perpendicular to the centerline of the straight groove segment. The flow guide plate also has multiple second flow guide grooves and flow guide protrusions. The flow guide protrusions divide the area of ​​the cold flow channel layer between the first and second flow guide grooves into multiple flow guide channels. The flow area of ​​the flow guide channels, the flow area of ​​the first flow guide groove, and the flow area of ​​the second flow guide groove are all equal. The heat exchanger and thermal management system provided by this application solve the problem of thermal stress concentration in the heat exchanger caused by inconsistent heat exchange effects at different locations in the cold flow channel layer.

The present application relates to the technical field of rocket engine fluid control, and relates to a flow regulating valve for a rocket engine, which comprises a valve body, a guide cylinder fixedly installed in the valve body, a valve core assembly axially slidably arranged in the guide cylinder, the valve core assembly being controlled to move axially in the guide cylinder, and a sealing element arranged between the valve core assembly and the valve body; the valve core assembly is configured to, in an open position, continuously regulate the medium flow area by changing the flow area with the valve body, and to rectify the flowing medium to adapt to the flow characteristics of the right-angle flow channel; and in a closed position, to guide the medium to the back surface on the side of the sealing element to enhance the sealing force by means of the medium pressure. The present application aims to solve the problems of high flow resistance of the window structure of the guide sleeve of the traditional valve, large local flow resistance caused by the non-rectification of the flat valve core, and sealing failure caused by the shrinkage deformation of the sealing element under low-temperature working conditions, and effectively reduces the flow resistance, improves the rectification, and improves the low-temperature sealing reliability.

The application discloses a ball valve, which comprises a valve core ball, the valve core ball comprises an inner cavity, a first flow-through port and a second flow-through port, the first flow-through port and the second flow-through port are communicated with the inner cavity; the central axis of the first flow-through port is defined as a third central axis, the sectional area of the section of at least a part of the inner cavity perpendicular to the third central axis is greater than the sectional area of the section of the first flow-through port perpendicular to the third central axis; the central axis of the second flow-through port is defined as a fourth central axis, the fourth central axis and the third central axis are arranged at an angle. In the above scheme, the sectional area of the section of at least a part of the inner cavity of the valve core ball perpendicular to the third central axis can be greater than the sectional area of the section of the first flow-through port perpendicular to the third central axis, the flow-through area of the inner cavity can be effectively increased, so that the flow resistance of the inner cavity can be reduced, and the flow-through capacity of the ball valve can be improved.

The utility model discloses a motor casing, motor assembly and vehicle belong to vehicle technical field, and this motor casing is provided with oil inlet flow channel, oil outlet flow channel, liquid inlet flow channel, first liquid outlet flow channel and second liquid outlet flow channel, and the outlet of oil inlet flow channel is adapted to communicate with the oil inlet of oil cooler, and the import of oil outlet flow channel is adapted to communicate with the oil outlet of oil cooler, and the outlet of liquid inlet flow channel is adapted to communicate with the liquid inlet of oil cooler, and the import of first liquid outlet flow channel is adapted to communicate with the liquid outlet of oil cooler, and second liquid outlet flow channel communicates with liquid inlet flow channel, and the motor casing has fluid transmission function, can reduce the use of external pipeline, is favorable to save pipeline cost, and can reduce the connecting operation of pipeline, is favorable to assembly cost, can also reduce the occupied space of pipeline, is favorable to save the layout space of whole vehicle, is convenient for the arrangement of motor assembly in the car, and additionally can shorten the transmission path of fluid, reduce flow resistance, improve the transmission efficiency of fluid.

The invention discloses a dustproof and moistureproof flexible driving heat dissipation device which comprises a mounting base, a heat dissipation cover plate, a driving arm and a driving connecting rod, heat dissipation holes are formed in the mounting base, the heat dissipation cover plate is used for covering or opening the heat dissipation holes, and the mounting base is rotationally connected with the heat dissipation cover plate through at least two rotary connecting structures to form a parallelogram structure. The mounting base is in transmission connection with the heat dissipation cover plate through a U-shaped driving arm, one end of the driving arm is fixedly connected with the mounting base, and the other end of the driving arm is fixedly connected with a driving connecting rod. According to the invention, illumination and heat can drive the CNT-Nafion / PE double-layer driver to deform and enable the heat dissipation holes to be opened or closed, and the projection of the heat dissipation cover plate on the mounting base when the heat dissipation cover plate is opened and the projection of the heat dissipation cover plate on the mounting base when the heat dissipation cover plate is closed can completely cover the heat dissipation holes. A macroscopic large-amplitude bending stroke can be generated by using extremely small temperature change, and the opening degree requirement of opening of a heat dissipation channel is met.

The utility model provides a kind of cement precast slab component, it is related to building wall water seepage prevention technical field, including component main board, limiting small column distributed in component main board inside, concave-convex structure distributed in the outside of component main board, screw mounting hole being arranged on component board, limiting small column, screw mounting hole coaxial arrangement, screw mounting hole is located on limiting small column.The utility model compared with prior art has realized completely avoided the waterproof layer surface support mode of poor adhesion, solves the construction technology common fault problem that can simultaneously ensure the adhesion between each structure layer and waterproof long-term reliable, improves the technical scheme of waterproof wall surface decoration construction quality, also provides the advantage that necessary construction condition can be provided for the waterproof layer that can be formed by the waterproof material with strong fluidity and permeability under wall surface pressure flow.

The staggered ladder porous-solid fin micro-channel radiator with the super-hydrophobic wall face comprises a heat conduction bottom plate, a heat conduction cover plate and a plurality of composite fin units, the upper ends of the composite fin units are fixedly connected with the heat conduction cover plate, the lower ends of the composite fin units are fixedly connected with the heat conduction bottom plate, and the heat conduction bottom plate is fixedly connected with the heat conduction cover plate. A micro-channel allowing cooling liquid to flow is formed between every two adjacent composite fin units, and the two ends of each micro-channel are provided with a cooling liquid inlet and a cooling liquid outlet correspondingly. Each composite fin unit comprises a plurality of porous fins and solid fins which are sequentially distributed in a staggered mode and fixedly connected, and the porosity of micropores in the surfaces of the porous fins changes in a gradient mode in the flowing direction of cooling liquid. The inner surfaces of the heat conduction bottom plate and the heat conduction cover plate and the surfaces of the two sides of the solid fins are all super-hydrophobic surfaces, the super-hydrophobic surfaces comprise base materials, and grooves consistent with the microchannels in direction are machined in the surfaces of the base materials. The heat dissipation efficiency of the micro-channel radiator under high heat flux is effectively improved, and the flow resistance of cooling liquid is reduced.

This utility model discloses a filter element and a filter for adhesive solutions. A filter element seat is provided at the inlet end of the outlet pipe, and a filter element is installed on the filter element seat. The inlet of the outlet pipe communicates with the inner cavity of the filter element. A filter element cover is provided at the top of the filter element, and a lower sleeve is provided at the bottom of the filter element. The lower sleeve is sealed and installed on the inlet end of the outlet pipe. The filter element includes an outer frame, an inner frame, and a jacketed filter cylinder. The jacketed filter cylinder is located between the outer frame and the inner frame. Both the outer frame and the inner frame have several mesh openings. In a horizontal projection plane, the jacketed filter cylinder is a corrugated closed cylinder, with the crests of the jacketed filter cylinder fixedly connected to the inner side of the outer frame, and the troughs of the jacketed filter cylinder fixedly connected to the outer side of the outer frame. The beneficial effects of this utility model are: the filtration area of ​​the filter element is 3-4 times larger than that of ordinary cylindrical filter elements, reducing the flow resistance of the filter element, improving the filtration efficiency, having a larger dirt holding capacity, and a longer filter element cleaning cycle.

The invention relates to a liquid cooling system and an electronic device. The liquid cooling system comprises a liquid inlet shell assembly, a plurality of first cold plates, a confluence shell assembly, a plurality of second cold plates, a liquid outlet shell, a liquid inlet pipe, a liquid outlet pipe, a liquid inlet nozzle and a liquid outlet nozzle. The liquid inlet shell assembly is provided with a flow dividing runner and a liquid inlet. And the liquid inlet is communicated with the shunting runner. The first cold plate is provided with a first heat exchange flow channel communicating with the flow dividing flow channel. The confluence shell assembly is provided with a confluence flow channel communicating with the first heat exchange flow channel. The second cold plate is provided with a second heat exchange flow channel communicating with the confluence flow channel. The liquid outlet shell is arranged on the second cold plate and provided with a liquid outlet communicating with the second heat exchange flow channel. And the liquid inlet pipe is communicated with the liquid inlet. And the liquid outlet pipe is communicated with the liquid outlet. The liquid inlet nozzle is arranged on the liquid inlet pipe. The liquid outlet nozzle is arranged on the liquid outlet pipe. And the liquid inlet and the liquid outlet are positioned on the same side of the second cold plate.

The invention relates to the technical field of check valves, and discloses a waterproof hammer check valve for the fire fighting field, which comprises a valve body, a valve cover is arranged in the valve body, one end of the top of the valve cover is connected with a connecting rod assembly, the valve cover can be attached to the surface of a valve seat through rotary fit, and the valve seat is embedded in one end in the valve body. Damping mechanisms are arranged outside the valve body and located on the two sides of the valve body respectively, the valve deck is pushed by reverse water flow to freely rotate firstly to quickly block a main flow channel, then a pressing block at the tail end of a rotating arm triggers a damping cavity piston plate, two-section type closing of'quick first and slow second 'is achieved, and one-time water hammer impact is converted into closure-energy consumption step-by-step attenuation. When the valve clack is opened, the piston reset spring and negative pressure jointly lift the sealing block, oil in the lower cavity instantly flows back through the communicating hole, and it is guaranteed that damping response is not lagged when the valve is closed next time.

The invention provides a one-way valve. The one-way valve comprises a valve body, a valve port, a supporting piece, a guide sleeve and a valve element. A valve cavity is formed in the valve body; the valve port is formed in the valve cavity and fixed to the valve body. The supporting piece is arranged in the valve cavity and fixed to the valve body, and a fluid channel is formed between the supporting piece and the valve body. The guide sleeve is arranged in the valve cavity and located between the valve port and the supporting piece, the guide sleeve comprises a mounting part and a transition part, the mounting part is fixed to the supporting piece, and the transition part is connected to the mounting part. The valve element is arranged on the guide sleeve and can move in the valve cavity in a reciprocating mode so as to open or close the valve port. A plane perpendicular to the center line of the valve body is defined as a cross section, and the area of the cross section of the transition part is gradually reduced from the valve port to the supporting piece.

This utility model discloses a heat exchange device and an electrical cabinet. The heat exchange device is used in a cabinet with a parallel cabinet surface and includes a shell and a heat exchange unit. A receiving cavity is formed inside the shell, and the shell has an exhaust port and a first air inlet. The heat exchange unit is placed in the receiving cavity. The heat exchange unit has an inner cavity communicating with the corresponding exhaust port and a cooling fan installed at the exhaust port. It includes two heat exchange sections and two baffles perpendicular to the X-axis direction. The two heat exchange sections are inclined relative to both the Y-axis and Z-axis directions. The two baffles connect the two heat exchange sections at their respective ends along the X-axis direction. The inner cavity is connected to the first air inlet only through air ducts. The cooling fan drives airflow from the first air inlet through each air duct to the exhaust port. The electrical cabinet includes the above-mentioned heat exchange device. This application still has high heat dissipation efficiency when the cabinets are parallel.

The utility model provides a new energy automobile heat management integrated module water side runner plate assembly and an automobile. The new energy automobile heat management integrated module water side runner plate assembly comprises a plate assembly, a five-way water valve, a three-way water valve, a warm air water pump, a battery water pump and a motor water pump, a flow channel for a motor, a flow channel for a battery and a flow channel for warm air are formed in the plate assembly; the motor water pump is communicated with the motor runner, the battery water pump is communicated with the battery runner, and the warm air water pump is communicated with the warm air runner; the motor flow channel is communicated with the battery flow channel through a five-way water valve, and the three-way water valve is arranged in the warm air flow channel. Through the integrated design of all the assemblies, the weight of the whole vehicle is reduced, and parts of the whole vehicle are reduced; due to the fact that the number of connecting points between the pipelines is reduced, the leakage risk of the system is reduced; the arrangement space of the whole vehicle is saved, the installation complexity of sub-assemblies is reduced, and installation is convenient and fast; the loading efficiency is improved, and subsequent fault detection and maintenance are facilitated.

This utility model relates to dishwashers, specifically providing a water cup assembly and a dishwasher, aiming to solve the problem of insufficient water intake in existing dishwasher water pump inlet structures, which leads to air or foam easily entering the water pump, causing cavitation and affecting the stability and reliability of the system operation. To this end, the water cup assembly of this utility model includes: a water cup with a downwardly recessed first groove; an insert disposed within the first groove to restrict the water flow path within the first groove; the insert has a notch, allowing water in the first groove to flow along the notch. The notch in this utility model increases the water intake in the first groove, helping to form a stable water seal layer in the water tank, effectively preventing air from entering the washing pump and preventing cavitation, thereby improving the operational stability and reliability of the washing system. Simultaneously, the notch structure of the insert reduces material usage while meeting functional requirements.

The utility model provides a printing roller cooling device, which belongs to the field of printing and comprises a first electromagnetic valve, a cold water pipe, a first cooling pipeline, a first nozzle and a second cooling pipeline, the cold water pipe is provided with the first electromagnetic valve to realize interval spraying, and two ends of the first cooling pipeline are respectively connected with the cold water pipe and the second cooling pipeline. A first nozzle is arranged at the position, connected with the cold water pipe, of the first cooling pipeline to conduct pulse cooling, the second cooling pipeline is an axial straight-through flow channel, and cooling water in the second cooling pipeline can flow in an unpowered mode. By optimizing the design of a flow channel in the printing roller, higher heat exchange efficiency is achieved, and therefore the requirement for a cooling system is lowered.

The invention discloses an efficient heat dissipation device based on non-Newtonian fluid and metal fins and a preparation method thereof.The efficient heat dissipation device comprises a sealing cover, a base and the porous metal fins, the sealing cover is internally provided with a containing cavity matched with the porous metal fins, the porous metal fins are arranged on the base, and the containing cavity is communicated with the base. The sealing cover covers the base, so that the sealing cover and the base form a sealed cavity structure, a working medium inlet and a working medium outlet are respectively formed in the sealing cover and are connected with an external liquid cooling circulation system, and a cooling working medium is a non-Newtonian fluid; according to the scheme, the non-Newtonian fluid is coupled with the porous fin structure, and the local viscosity of a working medium is actively regulated and controlled by utilizing a high shear field in the porous medium, so that the synergistic strengthening effect of low pump work and high heat exchange is realized.

The utility model provides a thermal management system, a battery pack and electric equipment, the thermal management system comprises a plurality of heat exchange assemblies, and at least part of the heat exchange assemblies comprise a plurality of heat exchange units; the multiple heat exchange assemblies are connected in series, and the multiple heat exchange units are connected in parallel. Or the multiple heat exchange assemblies are connected in parallel, and the multiple heat exchange units are connected in series. Through series-parallel combination of the heat exchange assemblies and the heat exchange units, partial series connection and partial parallel connection of the heat exchange units are achieved, too large system flow resistance and too large heat exchange effect difference during full series connection are avoided, insufficient flow distribution during full parallel connection is avoided, the heat exchange medium circulation efficiency can be improved, and the temperature difference can be reduced; and efficient heat dissipation and temperature control of the battery pack are realized.

This utility model relates to the field of die casting technology, and provides a temperature control structure for die casting molds and a die casting mold. The die casting mold has a fixed mold frame, a moving mold frame, and a product cavity. The product cavity is located between the fixed mold frame and the moving mold frame. The temperature control structure includes: a heat insulation plate, which is placed between the fixed mold frame and the die casting machine to block the heat transfer from the die casting mold to the die casting machine; a core, one end of which extends into the product cavity to form a hole-like structure on the casting; a water channel is provided inside the core, and at least part of the inner wall of the water channel is provided with concave and convex structures distributed around the core axis. The cooling medium flows through the water channel to cool the core; the concave and convex structures form local reinforcing ribs or support points on the inner wall of the water channel, which improves the structural rigidity and deformation resistance of the core under high temperature and high pressure loads, making it possible to appropriately reduce the core wall thickness while ensuring the overall strength; the wall thickness reduction can effectively shorten the heat conduction path and improve the thermal response speed of the mold.