53results about How to "Uniform temperature difference" patented technology

A method for the indirect application of printing liquid onto a printing material provides an intermediate carrier, preferably a circulating belt, a liquid conditioning medium including a first substance applied onto the intermediate carrier and a printing liquid, in particular an inkjet ink, including a second substance applied onto the conditioning medium on the intermediate carrier. The printing liquid is situated as droplets or a layer substantially on the conditioning medium and the droplets or the layer form a contact region on their underside with the conditioning medium. The printing liquid is heated, preferably by way of a dryer and the printing liquid is transferred from the intermediate carrier onto the printing material.

An air-conditioning apparatus uses carbon dioxide as a refrigerant, and includes comprises a two-stage-compression-type compression mechanism, a heat source-side heat exchanger, an expansion mechanism, a usage-side heat exchanger, and an intercooler. The intercooler uses air as a heat source. The intercooler is configured and arranged to cool refrigerant flowing through an intermediate refrigerant tube that draws refrigerant discharged from the first-stage compression element into the second-stage compression element. The intercooler is integrated with the heat source-side heat exchanger to form an integrated heat exchanger, with the intercooler disposed in an upper part of the integrated heat exchanger.

The invention discloses a multi-level single-component refrigeration natural gas liquefaction system and a multi-level single-component refrigeration natural gas liquefaction method. Purified natural gas is cooled gradually in six heat exchangers (evaporators) and a plate fin type heat exchanger (natural gas subcooler) until being liquefied. Cold energy required by the liquefying process is provided by a propane system, an ethylene system and a methane system. The system is rich in adjusting means, the cold energy matched with the natural gas liquefying process can be provided for the naturalgas liquefying process, and thereby operational flexibility and adaptability to raw materials of the method are embodied. The system and the method have the advantages that the natural gas liquefyingprocess is low in energy consumption; refrigerant compressors are all single-component compressors, so that design is easier, purchase is more convenient, the compressors are more stable in operation, domestic equipment can be used, and construction investment of liquefaction factories can be effectively reduced; and the liquefying process is wide in heat exchanger selection range, and a cold boxstructure and a tube-shell structure can be used simultaneously or alternatively.

Disclosed is a spiral and axial circulating cooling water channel structure for a motor. The cooling water channel structure comprises a stator iron core of the motor, a cooling water channel is arranged in the iron core, the cooling water channel comprises a first spiral channel and a second spiral channel which are adjacent and extend parallelly, the inlet end of the first spiral channel is adjacent to the outlet end of the second spiral channel, and the outlet end of the first spiral channel is adjacent to and communicated with the inlet end of the second spiral channel. The first spiral channel and the second spiral channel are arranged parallelly along the axial direction of the iron core. Cooling water flows from the front end of the stator iron core to the back end of the stator iron core, then flows back to the front end, can evenly cool the iron core, and reduce the temperature difference between the front end and the back end of the stator iron core. The cooling water generates turbulence during backflow, which reduces the thermal resistance, and increases the heat exchange coefficient and the ratio of heat exchange, so that temperature increasing of the motor can be reduced, the power density can be improved; and the sealing can be achieved by using one rubber gasket, and the reliability and the process are remarkably improved.

The invention discloses a battery heat management device which comprises first and second heat radiation devices. The first heat radiation device comprises a heat conducting side plate applied to thesurface of the battery, capillary tubes vertically arranged in the heat conducting side plate, and a liquid storage chamber positioned in the bottom of the heat conducting side plate, the liquid storage chamber contains a phase-transition material, and the capillary tubes are communicated to the phase-transition material in the liquid storage chamber; and the second heat radiation device is used to cool the battery or/and the heat conducting side plate in a forced way. According to the disclosed battery heat management device, the capillary tubes and water absorption fibers needless of power for drainage are used to take away heat from the battery for multiple times, the phase-transition material is saved, the environment is protected, and influence on a heat radiation effect when a lot ofphase transition materials contained in the cavity shake and do not make fully contact with the heat conducting side plate can be avoided; and the temperature difference in the battery and between different batteries can be balanced rapidly, heat accumulation is reduced, the service life of the battery is prolonged and a good work temperature environment is provided for the battery.

The invention relates to the technical field of DC-DC converters, in particular to a DC-DC converter device of a hydrogen fuel cell and a current control method thereof. According to the DC-DC converter device, a branch current acquisition module is responsible for acquiring real-time current of each phase branch and transmitting the real-time current to a DSP controller module; the branch currentacquisition module, a first voltage and current sampling and short circuit monitoring module and a second voltage and current sampling and short circuit monitoring module are electrically connected with the input end of the DSP controller module; the output end of the DSP controller module is electrically connected with the input end of an energy storage element and he input end of a power isolation switch tube module through an isolation switch tube driving module; and the first voltage and current sampling and short circuit monitoring module and the second current sampling and short circuitmonitoring module are respectively responsible for acquiring input end voltage and current and output end voltage and current and also responsible for monitoring input end current and output end current in real time so as to realize rapid response to the situation of overcurrent or short circuit of a circuit and rapid transmission of warning signals to the DSP controller module.

The invention discloses a bamboo veneer semi-finished product dryer, and relates to a drying device. The structure of the bamboo veneer semi-finished product dryer consists of a motor, a drive mechanism, a delivery mechanism, a box-shaped sealed cover body and a radiating fin, and is characterized in that: holes are reserved on the upper surface of the sealed cover body for fixing a plurality of axial flow fans; an exhaust tube is fixed in front of each axial-flow fan; the air outlet of the exhaust tube is communicated with the air inlet of each axial-flow fan through a pipeline; a rotating drum is respectively sleeved on a drive shaft and a driven shaft of the delivery mechanism fixedly; a plurality of pairs of spacing steel rings are fixedly welded on the outer circle of each rotating drum; a steel rope ring circles in the spacing space of the steel rope rings corresponding to the outer circles of each pair of drive and driven rotating drums; and a plurality of transverse pipe brackets are uniformly arranged on an inner rack of the delivery mechanism fixedly. The bamboo veneer semi-finished product dryer has the advantages that: the internal circulation of waste heat air is fully utilized by the combination of the exhaust tubes and the axial flow fans; and the temperature differences of each section are relatively uniform. The structure is simplified by taking a steel rope instead of a chain crawler type screen plate as a delivery belt; and the operation is balance.

The present invention discloses a battery safety heat management device. The battery safety heat management device comprises a cooling device, a recovery device and a safety device. The cooling devicecomprises a liquid storage cabin capable of heat conduction and attached to the surface of a battery; the recovery device comprises a diversion tube connected with the liquid storage cabin and condensation fins arranged on the diversion tube, and the liquid storage cabin contains phase-change materials; and the safety device comprises a safety cabin provided with a fire extinguishing agent and arranged at the upper portion of the battery, the inner wall of the safety cabin is made of thermal insulation materials, the bottom portion of the safety cabin is provided with buckled open holes, andthe open holes can be covered with a cover plate made of fusible materials.

The invention discloses a liquid cooling plate which is used for cooling a battery module, the liquid cooling plate is parallel to a first direction, one side of the liquid cooling plate along the first direction is provided with a liquid inlet port and a liquid outlet port along a second direction, and a flow channel is formed between the liquid inlet port and the liquid outlet port. The flow channel comprises a liquid inlet flow channel connected with the liquid inlet port, a liquid outlet flow channel connected with the liquid outlet port and at least two liquid separation flow channels arranged corresponding to the battery cell group, at least part of each liquid separation flow channel is coiled in a rectangular-ambulatory-plane shape, the liquid separation flow channels and the liquid inlet flow channel are intersected at a liquid separation inlet, and the liquid separation flow channels and the liquid outlet flow channel are intersected at a liquid separation outlet; each liquid separation inlet is arranged along a first direction, and each liquid separation outlet is arranged along the first direction; the lengths of the liquid separation runners are equal, and the sum of the lengths from the liquid separation inlets to the liquid inlet ports is equal to or similar to the sum of the lengths from the corresponding liquid separation outlets to the liquid outlet ports. According to the liquid cooling plate provided by the invention, the flow velocity of the liquid in each liquid separation flow channel is equal or similar, the flow velocity of the liquid in each region is relatively balanced, and the temperature of the liquid cooling plate is more balanced.

The invention provides a battery thermal management system and a battery thermal management method for a vehicle, and belongs to the field of vehicles. The battery thermal management system comprisesthe following parts of a battery; a vehicle control unit for sending a power-on signal when the vehicle is powered on, and sending a power-off signal when the vehicle is powered off; an auxiliary power supply unit, which is electrically connected to the battery and configured to be charged by the battery and store power when the vehicle is powered on; and an auxiliary thermal management system, which is communicatively connected to the vehicle control unit and electrically connected to the auxiliary power supply unit, and configured to be charged by the auxiliary power supply unit and heat thebattery at a preset temperature and a preset time period when receiving the power-off signal. The invention also provides a corresponding battery thermal management method. The battery thermal management system and thermal management method provided by the invention can solve the problems of poor driving experience and short battery life in cold areas.

The invention discloses a bending type parallel flow heat exchanger, which comprises an upper end plate and a lower end plate; a plurality of parallel flat pipes are fixed between the upper end plate and the lower end plate; a plurality of parallel flow channels are arranged in the flat pipes; a refrigerant inlet and an upper drainage groove are arranged in the upper end plate, and a refrigerant outlet and a lower drainage groove are arranged in the lower end plate; and a refrigerant enters the upper drainage groove through the refrigerant inlet of the upper end plate, flows into the flat pipes, reaches the lower drainage groove in the lower end plate through the parallel flow channels in the flat pipes, then enters the flat pipes, flows to the upper end plate, reaches the upper drainage groove in the upper end plate, changes the direction, then enters the flat pipes, reaches the lower end plate and finally flows out of the refrigerant outlet of the lower end plate. The S-shaped parallel flow heat exchanger of the invention can replace a traditional parallel flow heat exchanger, the temperature difference between gas and the heat exchanger in the gas heat exchange process is more uniform, the overall performance of the heat exchanger can be effectively improved, and the heat exchange efficiency of the heat exchanger is greatly improved.

The invention provides a film pressing wheel which comprises a pipe body, a heat source arranged in the pipe body and a rubber face coated on the outer surface of the pipe body. Both the rubber face and the pipe body are controlled by an outside electric eye, both the electric eye and a heating rod are regulated and controlled by an electric control box, multiple uniformly-distributed longitudinally-penetrating through holes are formed in the pipe wall of the pipe body, a temperature controller electric eye for controlling temperature of copper pipes and the rubber face is arranged, the copper pipes and copper woven nets are arranged in the penetrating through holes, the copper pipes are filled with liquid-state water, and the rubber face on the outer surface of the pipe body is controlled by the temperature controller electric eye. The film pressing wheel is soft in temperature change, low in defective percentage, high in pressed film yield and safety and convenient in temperature regulation, and points on the rubber face are stable in temperature and small in temperature difference.