215results about How to "Small flow resistance" patented technology

The immersed battery pack thermal management system comprises a battery pack box body, the battery pack box body is provided with a containing cavity with an opening in the top, the containing cavity is filled with a cooling medium, and a liquid outlet is formed in the side wall of the bottom of the battery pack box body; the plurality of single batteries are arranged in the accommodating chamber and are immersed in the cooling medium; the phase change working medium is arranged in the accommodating chamber and surrounds the outer side of the single battery; the cooling box body is fixedly arranged at the top opening of the battery pack box body, the bottom surface of the cooling box body is provided with a communication port communicated with the accommodating cavity, and a liquid inlet is formed in the cooling box body; by combining static cooling, low-flow dynamic cooling, high-flow dynamic cooling and multi-layer thermal management of the phase-change material, the cooling strategy can be dynamically adjusted under different temperature conditions, efficient heat dissipation is ensured, the internal temperature of the battery pack is more uniform by using the phase-change working medium, a proper cooling mode is selected as required, and the cooling efficiency is improved. And unnecessary energy consumption is avoided.

The invention relates to a high-efficiency circulating cooling device for mechanical seal, comprising a gland, a stationary ring assembly mounted on the gland, a dynamic ring assembly rotating with a rotating shaft and a pumping ring rotating with the dynamic ring assembly. The gland is provided with a flow-guiding heat sink for guiding flushing liquid entering from a flushing liquid inlet to the matching end faces of the stationary ring assembly and the dynamic ring assembly. The heat-conducting heat sink can force the flushing liquid to be introduced into the end faces of the stationary ring assembly and the dynamic ring assembly to forcibly take away the heat. Meanwhile, the heat-conducting heat sink can also conduct heat quickly to ensure that the sealing heat is taken away in time, and a stable and reliable liquid film can be formed on the end face. Meanwhile, the flow groove is optimized and improved on the ordinary flow channel, adopts an eccentric circle, and is divided into several sections to form a flow channel, which has the effect of significantly increasing fluid pressure and reducing flow resistance, and the pumping groove is a double-crescent-shaped structure. The pumping ring of this shape has the best pressure and flow rate among all closed pumping rings, and the flow rate is 2 to 3 times that of other structures under the same size.

The invention belongs to the technical field of fluid control, and relates to a rotary flow distribution adjusting device and method for aviation. Comprising an inlet shell, an annular impeller, a torsion spring, a valve element, a magnetic damper and an outlet shell. The flow distribution adjusting device is arranged at the pipeline branch position of a liquid pipe network branch system, fluid flows through the annular impeller, the annular impeller generates torsional force to drive the valve element to rotate to change the overflowing sections of the two outlets, continuous adjustment of the flow distribution proportion of different branches is achieved, and the larger the fluid flow speed is, the larger the stress of the annular impeller is. And the valve core is driven to select a larger angle to correspond to different outlet flow distribution conditions. According to the flow distribution adjusting device, the complexity of an adjusting system can be reduced, the flow resistance caused by flow distribution adjustment is reduced, and then the energy consumption of a power source in a liquid system is reduced.

The invention provides a motor bearing, a motor, an air compressor and an air blower, the motor bearing is provided with a first side opposite to a stator coil of the motor in the axial direction, the motor bearing is internally provided with a heat dissipation air channel, and the heat dissipation air channel is provided with a first air inlet and a first air outlet located in the first side; the motor bearing is provided with a shunting structure, the shunting structure is used for at least shunting incoming wind into first wind and second wind, and guiding the first wind to the first side, so that the first wind flows out from the first side; and the shunting structure further guides the second air to the first air inlet of the heat dissipation air duct, so that the second air flows out from the first air outlet. According to the technical scheme of the invention, the first wind and the second wind shunted by the shunting structure cooperate with each other, so that the stator coil and the motor bearing can be effectively cooled.

The invention discloses a thermal management system and a vehicle, and the thermal management system comprises an air conditioning system which comprises a condenser; the first control valve communicates with a high-pressure heat exchange loop, a battery heat exchange loop, a radiator loop, a heat exchanger loop, a heating loop and a circulation loop, and the first control valve selectively communicates with one or more of the high-pressure heat exchange loop, the battery heat exchange loop, the radiator loop, the heat exchanger loop, the heating loop and the circulation loop; the air conditioning system exchanges heat with the heat exchanger loop and the heating loop, and the heating loop communicates with the condenser; one end of the second control valve is communicated with the circulation loop and the battery heat exchange loop, the other end of the second control valve is communicated with the radiator loop, and the other end of the second control valve is communicated with the condenser. The flow direction of the cooling liquid is controlled through the first control valve and the second control valve, flow resistance in all working modes can be reduced, the energy utilization rate is increased, and the system is suitable for platform development.

The present disclosure provides an optical module, comprising: an upper housing comprising an upper cover plate; the chip generates heat, and the heat is transmitted to the upper cover plate; the heat dissipation part is arranged on the upper shell, is in contact connection with the upper cover plate and is used for diffusing heat on the upper shell; wherein the heat dissipation component comprises heat dissipation fins; a plurality of windward side surfaces are arranged on the heat dissipation fins, the windward side surfaces are used for making forward contact with air flows from multiple directions, and the size of the windward side surfaces is smaller than that of the leeward side surfaces of the heat dissipation fins; or, the heat dissipation fins are provided with arc-shaped windward side faces, and the arc-shaped windward side faces are used for making forward contact with air flow from multiple directions. According to the optical module provided by the invention, the heat generated by the chip in the optical module is quickly transmitted out through the heat dissipation component arranged on the upper shell, so that the optical module is ensured to have good heat dissipation efficiency.

The embodiment of the utility model discloses a stator core, a stator assembly and a motor, and relates to the technical field of motor stators. The stator core comprises a stator yoke, stator teeth and a supporting part. The stator yoke is in a closed ring shape. The number of the stator teeth is multiple, the multiple stator teeth are all arranged in the circumferential direction of the inner side of the stator yoke, and a stator groove is formed between every two adjacent stator teeth in a matched mode. The supporting part is arranged in the outer circumferential direction, away from the stator teeth, of the stator yoke, and an oil inlet groove is formed in the supporting part and communicated with the stator groove. According to the stator iron core, the oil inlet grooves are formed in the supporting parts in the circumferential direction of the outer side of the stator yoke, so that cooling oil is divided into a plurality of flow paths, each flow path can quickly enter the stator iron core, the cooling oil is distributed more uniformly, the problem of uneven cooling is avoided, and the cooling effect is improved.

The invention relates to the technical field of aviation, and provides a component implicit afterburner which comprises a combustion chamber, a diffuser, a supporting plate, an inner cone, a mixer and a driving assembly, and the diffuser, the supporting plate, the inner cone, the mixer and the driving assembly are arranged in the combustion chamber; the diffuser is arranged on the top face of the supporting plate, and the diffuser and the top face of the combustion chamber form a first flow channel. The inner cone is arranged on the bottom surface of the support plate and forms a second flow channel with the bottom surface of the diffuser; the first flow channel and the second flow channel are respectively communicated with an inlet of the combustion chamber; the driving assembly is connected with the mixer and used for driving the mixer to be connected with the end, away from the inlet of the combustion chamber, of the diffuser or driving the mixer to be contained in the containing cavity, flow resistance is reduced, the mixer is prevented from being in a high-temperature environment for a long time, the service life of the mixer is prolonged, and reliability of the mixer is enhanced.

The utility model provides a double-layer condenser for a vehicle and the vehicle, which belong to the technical field of heat exchange equipment and comprise a collecting pipe group, a liquid inlet pipe and a liquid outlet pipe, the collecting pipe set extends in the vertical direction of the vehicle body. The collecting pipe set comprises a first collecting pipe and a second collecting pipe which are arranged in the front-back direction of the vehicle body. A liquid inlet mounting position is arranged on the first collecting pipe, and a liquid outlet mounting position is arranged on the second collecting pipe; one end of the liquid inlet pipe is connected with the liquid inlet mounting position; one end of the liquid outlet pipe is connected with the liquid outlet mounting position; the pipe diameter of the liquid inlet pipe is larger than that of the liquid outlet pipe. According to the double-layer condenser for the vehicle, due to the fact that the pipe diameter of the liquid inlet pipe is larger than that of the liquid outlet pipe, under the condition that the flow of refrigerants flowing into the liquid inlet pipe is not changed, the flow speed of the refrigerants can be correspondingly reduced, and flow resistance is reduced.

The invention relates to the technical field of thermal management of aircrafts, in particular to a cold plate assembly and a heat dissipation system. The cold plate assembly comprises a first assembling unit, a second assembling unit and a heat exchange unit. The two sides of the heat exchange unit are detachably connected with the first assembling unit and the second assembling unit correspondingly. The heat exchange unit is provided with an inlet end and an outlet end; the heat exchange unit comprises at least one first flow channel and at least one second flow channel; the inlet end, the first runner, the second runner and the outlet end are communicated in sequence; the spacing distance between the first flow channel and the second flow channel is within a set range; the sum of the cross sectional areas of all the first flow channels is smaller than the sum of the cross sectional areas of all the second flow channels. Therefore, the problem of how to improve the heat exchange effect of the cold plate on the electronic equipment is solved.

The invention belongs to the technical field of engines, and discloses a rotary detonation combustion chamber which comprises a combustion chamber body, the combustion chamber body comprises a combustion chamber shell composed of an inner sleeve structure and an outer sleeve structure, a fluid channel is formed in the combustion chamber shell, and the inlet end of the fluid channel is a combustion chamber air inlet; the fluid channel comprises a combustion chamber throat section, a first expansion section, a U-shaped groove section, a second expansion section and a combustion chamber downstream straight section which are sequentially arranged. One end of the combustion chamber throat section communicates with the combustion chamber air inlet. And the U-shaped groove section comprises a U-shaped groove fillet section and a U-shaped groove straightway section which are arranged in sequence. The whole U-shaped groove fillet section is of a topological fluid diode structure, and one end, close to the first expansion section, of the topological fluid diode structure is of an arc-shaped structure. The topological fluid diode structure provides a new view angle and a new solution for optimization of the combustion chamber, and design and development of the more efficient and more stable combustion chamber are promoted.

The utility model belongs to the technical field of flow control devices, and provides a laminar flow element and a mass flow controller, the laminar flow element comprises a sleeve, the sleeve comprises a first section and a second section which are arranged along a first direction, and the inner surface of the second section is provided with an internal thread; the plunger is arranged in the sleeve; the plunger comprises a third section and a fourth section which are arranged in the first direction, an annular laminar flow gap is defined by the third section and the first section, and the area of the cross section of the laminar flow gap is gradually decreased in the direction from the third section to the fourth section; at least one of the second section and the fourth section is provided with a channel, the channel extends in the first direction, the channel is communicated with the laminar flow gap, and the channel is communicated with the two ends of the sleeve in the first direction; and an external thread is arranged on the outer surface of the fourth section and is in threaded connection with the internal thread. According to the laminar flow element provided by the embodiment of the invention, the technical problem that the sleeve cannot be used after assembly errors are solved.

The present invention discloses an integrated heat dissipation packaging structure based on an array micro-spray structure, comprising a CPU, an adapter plate and a housing, wherein the adapter plate is assembled in the housing, and the CPU is arranged on the packaging area of ​​the adapter plate and is sealed and connected with the adapter plate; the adapter plate is provided with a first input micro-channel, a second input micro-channel, a third input micro-channel and an output micro-channel, and a plurality of horizontal parallel grooves are arranged in the packaging area of ​​the adapter plate, and the two ends of the horizontal parallel grooves are respectively connected with the first input micro-channel and the output micro-channel, and a vertical array nozzle is arranged in the horizontal parallel groove, and the vertical array nozzle is connected with the second input micro-channel and the third input micro-channel in the vertical direction. The present invention also discloses a method for manufacturing the above-mentioned packaging structure. The present invention realizes turbulence by simultaneously arranging parallel straight-through grooves and vertical array micro-spray structures on the adapter plate, effectively improving the heat dissipation capacity while reducing the difficulty of the bonding process between the adapter plate and the CPU, thereby improving the mechanical strength of the CPU.

The invention discloses a wing-shaped column liquid cooling plate which guides cooling liquid to fully flow through a surface area of a bottom plate and improves heat transfer efficiency. The device comprises a bottom plate; the upper cover plate comprises a peripheral baffle and a top plate, a water inlet and a water outlet are formed in the top plate, and the water inlet and the water outlet are formed in the two ends of the top plate in the length direction; each group of wing-shaped columns sequentially comprises a front-end inflow end, a middle first width keeping end, a middle second width reducing end and a tail tip in the flow direction; a plurality of sets of wing-shaped columns are arranged in the center area of the upper surface of the bottom plate, the bottoms of the wing-shaped columns and the bottom plate are connected into a whole, the upper surfaces of the wing-shaped columns are tightly attached to the lower surface of the top plate, and the bottom of the peripheral baffle is welded to the corresponding upper surface of the bottom plate to form a liquid cooling cavity. And the plurality of wing-shaped columns are arranged in the liquid cooling cavity.

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 an electric three-way valve which comprises a driving device and a valve body, the driving device comprises a stepping motor and a reduction gearbox, the reduction gearbox is provided with an output planet carrier, a ball core is arranged in the valve body, an output shaft of the output planet carrier is connected with the ball core, the valve body is provided with three connectors, the three connectors are a port B, a port C and a port A respectively, the port A is an inlet, and the port B is an outlet. A channel a, a channel b and a channel c are arranged in the ball core, the stepping motor controls the ball core to be in a boundary state when the ball core rotates by 90 degrees through the reduction gearbox so that the ball core can be in the four boundary states of 0 degree, 90 degrees, 180 degrees and 270 degrees, the angle between the two boundary states of the ball core is in a transition state, and the ball core is used for adjusting fluid flow when in the transition state. Continuous flow adjustment can be achieved, the phenomenon of shock cooling and shock heating is avoided, opening and closing of the port B and the port C can be independently controlled, and optimal control over the system is achieved.

The invention discloses an air injection structure which comprises an air injection head. The jet head is provided with a circumferential air channel, one end of the circumferential air channel is used for being connected with the air inlet pipe set, the other end of the circumferential air channel faces the cavity wall of the reaction cavity, and the circumferential air channel is arc-shaped. Compared with an air channel with a right-angle corner, the circumferential air channel of the air injection structure is arc-shaped, has the characteristics of small flow resistance, far air injection direction and large momentum, and is easier to change the etching uniformity by adjusting the air flow; furthermore, gas is sprayed in a spiral gas spraying mode, the gas is sprayed to the inner surface of the cavity in a non-vertical mode, and a non-vertical inclination angle exists between the direction of spraying the gas to the inner surface of the cavity and the tangential direction of the inner surface of the cavity, so that attachments on the surface of the cavity can be removed more easily, and loss of the surface of the cavity is reduced. The invention further discloses an etching machine applying the air injection structure.

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 invention provides a heat exchanger which is provided with a middle area and an end area, the heat exchanger comprises at least two plates, the plates are stacked in the height direction of the heat exchanger, each plate comprises a plurality of protruding structures, at least part of the protruding structures are distributed in the middle area, and the protruding structures located in the middle area are arranged in an array mode in the first direction and the second direction. The first direction intersects with the second direction, an included angle between the first direction and the second direction is defined as alpha 1, the alpha 1 faces the end area and is smaller than 90 degrees, and the flow resistance of fluid in the heat exchanger can be reduced.

The utility model relates to the field of heat dissipation equipment, in particular to a heat exchange plate and a phase-change high-power water-cooling VC structural member thereof, the phase-change high-power water-cooling VC structural member comprises a water-cooling module and a VC module, the water-cooling module comprises a water-cooling upper cover and a heat exchange plate, the water-cooling upper cover covers the heat exchange plate, a condensation cavity is formed between the water-cooling upper cover and the heat exchange plate, and the VC module is arranged in the condensation cavity. The water-cooling upper cover is connected with a liquid inlet and outlet connector, and the bottom face of the heat exchange plate is connected with the VC module. The heat exchange plate comprises a heat exchange bottom plate, a heat dissipation column module is arranged on the surface of the heat exchange bottom plate, the heat dissipation column module comprises a plurality of heat dissipation columns, and the heat dissipation columns are arranged in an inclined array mode. The design of the heat dissipation column modules arranged in an inclined array mode is adopted, and the heat dissipation efficiency is remarkably improved. And by reducing the flow resistance, the subsequent heat dissipation water flow can be more quickly and uniformly dissipated into the corresponding heat dissipation cavity, and the problem of local overheating is effectively avoided.

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.

The present invention belongs to the application field of uranium enrichment process, and specifically discloses a ceramic valve core vacuum regulating valve, wherein the valve seat and the valve core are made of ceramic material, the valve seat is located inside the valve body and is fixedly connected to the valve body; the valve core is located inside the valve seat and is connected with the valve seat; the bracket is located above the valve body and is fixedly connected to the valve body; the actuator is located above the bracket, the valve stem is located inside the bracket, and the valve stem is respectively fixedly connected to the actuator and the valve core; the bellows and the packing device are sleeved on the valve stem, the bellows is located inside the bracket, the packing device is located above the bellows, the packing device is fixedly connected to the bracket, and the bellows is fixedly connected to the packing device; the disc spring and the disc spring pressure plate are sleeved on the packing device, the disc spring pressure plate is located above the disc spring, and the disc spring pressure plate is fixedly connected to the bracket. The valve core and valve seat of the present invention are made of ceramic material, have good abrasion resistance, high processing accuracy, and good sealing performance.

The utility model discloses a demisting and reflowing device for a rolling line. The demisting and reflowing device comprises an air suction cover, a fan assembly, a suction pipeline, a demister and a reflowing pipe, a horn-mouth-shaped air suction cover is horizontally erected at the position, where a large amount of water mist is formed, of an inlet and outlet of the rolling mill, the lower end of the air suction cover is a large-diameter end, the upper end of the air suction cover is communicated with one end of the suction pipeline in a sealed mode, and the other end of the suction pipeline and one end of the backflow pipe are both communicated with the lower end of the vertically-arranged demister in a sealed mode. The other end of the return pipe extends to the slag sluice; a draught fan assembly is further arranged in the air suction cover, on-site mist is sucked away through the draught fan assembly and sent into the demister to be subjected to gas-liquid separation, and formed liquid drops flow into the backflow pipe due to gravity and flow back to the slag flushing trough through the backflow pipe to be recycled. According to the demister, water mist generated on site can be effectively removed, liquid drops collected by the demister can flow back to the slag sluice, and the consumption of circulating water is reduced.

The utility model provides a liquid pump and an oral irrigator, the liquid pump is used for the oral irrigator, the liquid pump comprises a pump body and a plug valve mechanism, the pump body is provided with a first flow channel and a second flow channel, and the first flow channel is communicated with the second flow channel; the plug valve mechanism is arranged on at least one of the first flow channel and the second flow channel, and the plug valve mechanism comprises a plug valve; the plug valve is used for allowing or preventing the liquid medium in the first flow channel from flowing into the second flow channel; wherein a liquid passing groove is formed in the outer side wall of the plug valve, a liquid passing notch is further formed in the plug valve, the liquid passing notch is communicated with the liquid passing groove, the liquid passing groove is communicated with a liquid outlet of the second flow channel, and the first flow channel can be communicated with the liquid passing groove when the plug valve is opened. According to the liquid pump and the oral irrigator, the flow resistance is small when the liquid medium flows through the plug valve, liquid kinetic energy loss caused by unnecessary liquid medium impact can be reduced, and the liquid medium pumping performance of the liquid pump is improved.

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 utility model provides an air duct structure, dust collection device, base station and cleaning system.The air duct structure comprises an air duct main body and a sound absorption structure, the air duct main body is used as a channel for conveying airflow, and the air duct main body comprises a first air duct section and a second air duct section; at least part of the first air duct section and at least part of the second air duct section are sequentially connected in the airflow flowing direction. The sound absorption structure is arranged on the outer wall of at least part of the first air duct section; the flow channel area of the first air channel section is smaller than that of the second air channel section. According to the air duct structure, the dust collecting device, the base station and the cleaning system, noise output by the base station when dirt is collected can be reduced, and the use experience of a user is improved.

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.

The present invention belongs to the technical field of heat dissipation of electronic components, and in particular, relates to a temperature equalizing plate and a manufacturing method thereof. It solves the defects of the prior art such as unreasonable design. The temperature equalizing plate includes a plate body with a closed liquid-injected negative pressure cavity, in which at least one woven mesh layer formed by weaving a plurality of strip-shaped bodies is arranged, and the strip-shaped bodies are woven at an acute angle in the long-distance condensation direction formed between the heat source area and the condensation area of ​​the plate body; at least one woven mesh layer is provided on the at least one woven mesh layer, which is distributed in the thickness direction of the plate body and formed by a plurality of mutually spaced or connected unit support water collection parts, and the unit support water collection parts are claw-shaped structures; and a spindle water collection structure is provided on the strip-shaped body and / or the unit support water collection part. Advantages of the present application: reducing flow resistance and improving heat dissipation performance.

The present invention provides a flow field plate with variable cross-section and parallel flow channels in series, a bipolar plate and a fuel cell stack, wherein the flow channel area of ​​the flow field plate is a parallel flow field composed of mutually parallel flow channel ridges and flow channel grooves, and a plurality of adjacent common channels are respectively provided at both ends of the parallel flow field opening, and the areas of the common channels decrease successively, and the common channels are separated by a sealing structure, and the common channels at both ends of the parallel flow field opening are symmetrically distributed, and a group of parallel flow channel groups are formed between the common channels with the same areas at both ends of the parallel flow field opening, and the two edges of the flow field plate parallel to the parallel flow field flow channel ridges and flow channel grooves are provided with inlet common channels and outlet common channels for other media. In the present invention, the medium flow cross-sectional area in the flow field plate gradually decreases, so that the gas flow rate or stoichiometric ratio in the entire flow field area does not decrease with the reaction consumption of the medium, which has the effect of enhancing the liquid water discharge efficiency and reducing the apparent stoichiometric ratio.