466results about How to "Fast cooling" patented technology

The invention discloses spherical attapulgite flower ceramsite. The key points of the technical scheme are that the spherical attapulgite flower ceramsite consists of high-adhesion attapulgite clay powder, attapulgite clay tailing powder, red bentonite powder, sludge, diatomite tailing powder and rice husk powder. The spherical attapulgite flower ceramsite is produced by the following steps of mixing the ingredients, pelleting, roasting, cooling, screening and packaging. The spherical attapulgite flower ceramsite has a rough and porous surface, is light in weight, high in strength and water absorption rate, can be immersed in water throughout the year without cracking and can continuously and slowly release nutrition required by flowers. Moreover, the spherical attapulgite flower ceramsite is produced by comprehensively utilizing the sludge and tailings, so that the resource utilization rate is improved, waste is turned into wealth, and environment is protected. Besides, the cylindrical attapulgite flower ceramsite is applicable to cultivation of various flowers and vegetables.

The invention relates to a method for producing hardened structural parts from sheet steel. The method includes shaping at least one shaped part made of sheet steel provided with a cathodic corrosion protection coating, performing any required final trim of the shaped part and possibly any required punching, or the creation of a perforation pattern, subsequently heating the shaped part, at least over partial areas, under the admission of atmospheric oxygen to a temperature which permits austenizing of the steel material, and thereafter transferring the structural part to a mold-hardening tool and performing mold-hardening in the mold-hardening tool, wherein the structural part is cooled by the contact with and pressing by the mold-hardening tool and is hardened thereby.

Embodiments of the invention provide apparatuses for vapor depositing tungsten-containing materials, such as metallic tungsten and tungsten nitride. In one embodiment, a processing chamber is provided which includes a lid assembly containing a lid plate, a showerhead, a mixing cavity, a distribution cavity, and a resistive heating element contained within the lid plate. In one example, the resistive heating element is configured to provide the lid plate at a temperature within a range from about 120° C. to about 180° C., preferably, from about 140° C. to about 160° C., more preferably, from about 145° C. to about 155° C. The mixing cavity may be in fluid communication with a tungsten precursor source containing tungsten hexafluoride and a nitrogen precursor source containing ammonia. In some embodiments, a single processing chamber may be used to deposit metallic tungsten and tungsten nitride materials by CVD processes.

A method of forming a product from an initial blank comprises subjecting the initial blank to a hot forming and press hardening operation to form the product with substantially a uniform first tensile strength. Subsequently, the product is subjected to post hot-forming processing in which a first region of the product is heated selectively to above a known temperature, using one of conduction heating, resistance heating, and induction heating. The first region is then cooled, such that the first region attains a second tensile strength that is substantially less than the first tensile strength.

The invention belongs to the field of powder metallurgy sintering, in particular refers to a trace cobalt-containing tungsten carbide without bonding phase and preparation method thereof. A hard alloy comprises components, by weight, as follows: 0.20-1.00% of Co, 0.01-0.50% of Cr3C2, 0.01-0.50% of VC and the balance of WC with grain size of 0.2-0.8 mum. The preparation method comprises the steps of: carrying out feeding and high energy ball milling according to the above raw material powder ratio, until WC powder in the ball milling powder has an average grain size refined to less than 200nm; then sintering the cemented carbide powder rapidly after the high energy ball milling by discharge plasma. The tungsten carbide base cemented carbide powder of the invention has reasonably designed components and a simple preparation method; the powder gives out heat uniformly and has fast heating and cooling speed, low sintering temperature and short sintering time to save the energy greatly; and the obtained ultrafine-grained WC cemented carbide has excellent integrated properties.

An apparatus and method for preparing frozen tissue specimens includes a base supporting a pair of rotary motion platforms and a center platform. The rotary motion platforms are movable from an open, side-by-side position to a closed, center platform-covering position. The rotary motion platform includes a plurality of cryogenic discs, each identified for receiving a plurality of tissue samples. The center platform includes a plurality of cryogenic discs, each having a plurality of bores for receiving object holders thereon, each object holder for receiving a frozen specimen thereon. The center platform cryogenic discs each have a channel system with intersecting peripheral, chordal and radial channels. A moistening tray includes structure having a closed, object holder wetting position and an open, object holder elevating position. Further disclosed is the use of a tissue orientation map, usable on temporary tattoos and tissue receiving sheets for specimen orientation and mapping of tumor roots. Also disclosed are labels and identification methods, fiber-reinforced embedding compounds and the use of treated polyester sheets for tissue specimen placement.

The invention discloses a refrigerator, which comprises a refrigerator body, an evaporator, a heat exchanger, an air inlet air flue, an air return air flue, a refrigerating fan, an electric air door, a temperature detector and a controller, wherein the heat exchanger is arranged in a cold-storage compartment and is further provided with an air inlet opening and an air return opening; one end of the air inlet air flue is communicated with the air inlet opening; the other end of the air inlet air flue is further communicated with a refrigerating compartment; one end of the air return air flue is communicated with the air return opening; the other end of the air return air flue is further communicated with the refrigerating compartment; the refrigerating fan is arranged in the refrigerating compartment and is used for conveying cold air in the refrigerating compartment into the heat exchanger; the electric air door is arranged in one of the heat exchanger, the air inlet air flue and the air return air flue and is used for regulating the air quantity entering the heat exchanger from the refrigerating compartment; the temperature detector is arranged in the cold-storage compartment; and the controller is respectively connected with the temperature detector and the electric air door, so as to control the opening angle of the electric air door according to a temperature value detected by the temperature detector. According to the embodiment of the invention, the refrigerator has excellent moisturizing performance and freshness-preserving performance.

The invention relates to an energy-saving environmental-protection type abrasion resistant canned hydrocarbon refrigerant, which comprises propane and isobutane. The energy-saving environmentally-protective abrasion resistant canned hydrocarbon refrigerant is characterized in that the energy-saving environmentally-protective abrasion resistant canned hydrocarbon refrigerant further comprises low temperature refrigeration lubricating oil; the propane accounts for 54 to 65 percent; the isobutane accounts for 30 to 40 percent, and the low temperature refrigeration lubricating oil accounts for 3 to 8 percent. The hydrocarbon refrigerant is prepared by mixing mixed alkane with certain proportion and the low-temperature refrigeration lubricating oil in proper amount, thus effectively solving the problem of the prior hydrocarbon refrigerant that a compressor is abraded frequently and a cylinder bore is scuffed frequently due to the characteristics of being too dry and excellent oil solubility, The hydrocarbon refrigerant with mixed alkane disclosed by the invention belongs to natural working fluid, is free of fluorine without influence on warming-up of the global climate. Compared with R12 and R134a, the freezing point is lower; the latent heat of vaporization is larger; the specific energy of constant entropy compression is smaller so that the compressor works more easily. The flowing property is better; the delivery pressure is lower; the load of the compressor is lower; fuel consumption is reduced and the energy-saving rate can reach 10 percent to 20 percent when the air conditioners are running.

The invention discloses a reliable arcing system of a non-polarity high-voltage direct current contactor. The reliable arcing system of the non-polarity high-voltage direct current contactor comprises a sealed contact chamber of the contactor and at least two permanent magnets, wherein two fixed contacts are fixedly installed in the contact chamber, two normally-opened movable contacts are movably installed in the contact chamber, and the two movable contacts and the two fixed contact are matched correspondingly in the vertical direction respectively; the permanent magnets are installed on the side of the extension line of the connection line of the two fixed contacts, and the magnetic direction of the permanent magnets is set not to be perpendicular to the current direction between the movable contacts and the fixed contacts. The arcing magnets and heat dissipation grid pieces of a special structure are arranged in the contact chamber of the direct current contactor, so that the electric service life of load switching can be prolonged by more than ten times, meanwhile, the non-polarity requirement of the contacts is met, and the contactor of the working voltage of 200-1000V can really meet the requirement for service life of whole matched equipment.

The invention proposes a cooling system (42) for a gas turbine (1), with an annular duct extending axially in the compressor (5). In the annular duct, a ring (15) of compressor guide blades (14, 28, 33) and a ring (17) of moving blades (16) fastened to a rotor disk (19) of the rotor (3) are provided, with at least one cooling-air extraction point (34), arranged on the rotor (3), for diverting a cooling-air stream into a cooling-duct system arranged in the rotor (3), and with a turbine unit (8), in which, when the gas turbine (1) is in operation, components subjected to thermal stress by a hot gas (20) can be cooled by the divertible cooling-air stream, and also with a feed line (46) for feeding a liquid (45) into the cooling-air stream. In order to make it possible to feed a liquid into the cooling-air stream simply and cost-effectively, the invention proposes that the feed line (46) extend with a subduct (44) through at least one of the compressor guide blades (28, 33) of the ring (15), and the orifice (48, 49) for the outlet of the liquid (45) be connected in the region of the cooling-air extraction point (34).

The invention provides a casting method of movable and fixed vortex casting pieces of a compressor, aiming at solving the technical problem that the movable and fixed vortex casting pieces generate loosing and shrinkage at the hot joint in the casting process. The casting method comprises the following steps: embedding a conformal cold iron into the hot joint of the casting piece at the corresponding position of a core box, then carrying out sand shooting and manufacturing a sand core with the conformal cold iron; and placing the sand core with the conformal cold iron into a casting mold, combining a dead head feeding technique and casting the casting piece. The shape of the conformal cold iron is manufactured into a vortex shape or an arc shape according to the shapes of a vortex sand core teeth and the position of the hot joint of the vortex casting piece. One end of the conformal cold iron is provided with a columnar positioning lag; and the core box is provided with a positioning hole matched with the positioning lag. The sand core is internally provided with the conformal cold iron which is directly applied on the hot joint, thus having fast cooling speed and leading the hot joint position to obtain maximum subcooled temperature in the vortex casting piece. The casting method can effectively solve the defects of loosing and shrinkage of the root part of the vortex teeth.

The invention discloses a vehicle self-contained refrigeration machine set, which comprises: a power system, a control system, a refrigeration system and an electrical heater set, wherein the power system is connected with the control system, the power system is used for supplying the control system with electric power and is controlled by the control system; the control system is connected with the refrigeration system and the electrical heater set, the control system collects working parameters of the refrigeration system and the states of a refrigeration box, generates a control signal after data processing and adopts the control signal to control the operations of the refrigeration system and the electrical heater set. Driven by an alternating current variable frequency motor or a direct current variable frequency motor, the machine set adopts a low-speed starting compressor, therefore the current is small when the machine set is started, and no impact on an engine system is caused, thus the allowance in selecting style of diesel engine is reduced, a generator set with smaller model is selected, and fuel consumption is reduced. In addition, by adopting an electrical heating manner to produce heat and to deforest, design of the refrigeration system is greatly simplified, and the heat producing and the deforesting are realized directly and simply.

This invention involves a kind of step quenching process which is suitable for Bainitic and Martensite quenching and the equipment utilizing this step quenching process. The workflow includes: heating, quenching in low-temperature nitrate groove and isothermal; turn to oil grooves to cool down, wash and dry; turn to air furnace for isothermal temper. The above step quenching is performed in roller hearth furnace production line. After adjusting the technology parameter, this production line can undergo Bainitic step quenching and Martensite step quenching. This production line is composed mainly by roller hearth heating furnace, nitrate groove, oil groove, cleaner, dryer and temper furnace. This invention can improve the heat treatment quality; reduce the amount of nitrate and pollution. This production line can undergo normal Martensite quenching, Martensite step quenching and Bainitic step quenching, so to reduce investiment and increase the effeiciency.

The invention relates to an electroslag smelting casting method of fixed blades of a water turbine. Consumable electrodes are prepared by adopting a voltaic arc furnace refining method and the fixed blades are prepared by adopting an electroslag smelting casting process through a mould. The chemical components of the consumable electrodes are controlled as follows: C is 0.14-0.19 percent, Si is less than or equal to 0.6 percent, Mn is 1.5-1.9 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, V is 0.02-0.15 percent, Nb is 0.015-0.06 percent, Ti is 0.15-0.25 percent, Al is more than or equal to 0.015 percent, O is less than or equal to 0.0040 percent, N is less than or equal to 0.0080 percent, H is less than or equal to 0.00035 percent, and the balance is Fe. The electroslag smelting casting system and the electroslag guide are controlled as follows: CaF2 is 60-80 percent, Al2O3 is 40-20 percent, or less MgO and CaO (the total is less than or equal to 20 percent); and the electroslag amount is usually 1.5-5 percent of the weight of a casting. The invention has less amount of oxide and sulfide, small size, even distribution, clean casting base body, high cooling speed, large crystallization temperature gradient at the front of solid and fluid, compact casting texture, high size precision and little distortion, and can greatly improve the product property of the refined casting.

The invention provides a preparation method for ultra-coarse spherical tungsten powder and belongs to the technical field of powder preparation. Conventional tungsten powder is selected as a raw material, polyving akohol (PVA) pelleting, vacuum drying and screening are conducted, and large-particle precursor powder is obtained; and when passing a radio frequency plasma body high-temperature region, the precursor powder is subjected to heat absorption, melting and spheroidizing and then subjected to shock cooling and curing, and the spherical powder is obtained. The prepared spherical tungsten powder is large in grain size, uniform in component, high in sphericility, good in liquidity and low in oxygen content and meets the process requirements of a laser near-net forming technology and a shaped charge liner manufacturing technology. The preparation method has the beneficial effect that the problems that when the spherical tungsten powder is prepared, due to the fact that the raw material powder is too fine, liquidity is poor, and powder conveying is difficult are solved effectively.

This invention relates a linear motor cooler. The cooling water tube of the cooler is inserted into the iron-core of the motor and placed in the wire trough close to the coil. The two cooling water tubes are connected by a connecting piece. The double cooling liquid pass-way of the other end of the cooling water tube is connected by an external connector. An then connected are inlet and outlet to form a complete cooling loop. Then the same is linked with an external circulation cooler. The advantages are: quick cooling, high efficiency, compact structure and small space occupation.

The invention relates to a construction method of mass concrete temperature decrease and crack prevention by utilizing a thin-walled corrugated pipe circulating water system, which comprises the following steps: (1) selecting circulating water pipes: selecting thin-walled iron-sheet corrugated pipes as the pipeline materials for arranging circulating water pipes; (2) arranging a circulating waterpipe system: in the process of binding a reinforcing cage, installing and fixing the corrugated pipes to the reinforcing cage in a spiral or laminated way according to the structure form of a mass concrete, wherein, the distance between layers is from 500 mm to 2000 mm, the distance between rows in the layers is also from 500 mm to 2000 mm, and providing a water inlet pipe and a water outlet piperespectively connected with the corrugated pipes on the upper part of the mass concrete; (3) arranging temperature measuring points; (4) pouring the concrete; and (5) keeping maintenance. The construction method has the advantages of obvious effect on the temperature decrease and crack prevention of the mass concrete, low cost, simple operation, convenient and quick construction and convenience inthe connection of the corrugated pipes.

The invention discloses a process for preparing an activated mixed material through strand sintering of coal gangue. The process comprises the following steps: (1) crushing; (2) preparing materials, and uniformly mixing, namely sufficiently and uniformly mixing crushed coal gangue, quick lime, a carbon fuel and water in a cylinder mixing machine in a set ratio; (3) pelletizing, namely pelletizingthe uniformly mixed minerals into beads of a preset granularity; (4) sintering, namely performing allocation, ignition, air sucking sintering and cooling on the pelletized beads in a strand air sucking sintering machine; (5) crushing and finely grinding, namely crushing the sintered material, and finely grinding till a set specific surface area, thereby obtaining the activated mixed material. Theinvention provides the process for preparing an activated mixed material through strand sintering of coal gangue, by virtue of the properties that a combustion zone is high in temperature and short intime in the sintering process, a vitric phase can be formed, meanwhile, the sintered material mainly contains an oxidation atmosphere, harmful components such as organic matters, residual carbon andsulfur in the coal gangue can be removed at a high temperature, and the cementing property, the freezing resistance and the durability of cement are protected from adverse influence of the harmful components.

The invention relates to a self-overlapping refrigeration system provided with at least one high-temperature self-overlapping loop (1) and at least one low-temperature self-overlapping loop (2), wherein the high-temperature self-overlapping loop (1) and the low-temperature self-overlapping loop (2) are respectively an independent and closed refrigeration circulation loop, and the high-temperatureself-overlapping loop carries out temperature-reduction fractional condensation for the second time to a gas refrigerant of the low-temperature self-overlapping loop after fractional condensation forthe first time by an intermediate heat exchanger. The invention enables the medium temperature of a refrigeration working medium to be lower, reduces the pressure of a low-temperature level system, obviously reduces the exhaust temperature and the exhaust pressure at the previous period of starting-up and temperature reduction, enhances the temperature-reduction speed simultaneously and enables alow-temperature level to obtain much larger refrigerating capacity. The invention enhances the effects of fractional condensation and separation by utilizing the evaporation of a working medium with high boiling point and a mixed regenerative cycle mode of a low-temperature flow-reversal working medium in the low-temperature level, and can ensure that components with high boiling points are more completely separated out.

The invention discloses an air conditioner capable of controlling transfer of a refrigerant and a control method of the air conditioner and belongs to the field of air conditioners. In the air conditioner, a four-way reversing valve having a stop function is used; during start and shutdown of the air conditioner, the transfer of the refrigerant can be actively controlled during the start and shutdown of the air conditioner by controlling closing and opening of an electronic expansion valve, controlling start and stop of a compressor and controlling the switching of modes of the four-way reversing valve, so that the air discharging speed and the cooling speed when the air conditioner is started in a refrigeration mode can be effectively increased, and energy conservation is realized.

The invention discloses a double containers air-cooled and frost free horizontal refrigerator, relates to the technical field of refrigerating equipment, is not limited by a refrigerator box platform,and is simple in structure and easy to produce and assemble. The double containers air-cooled and frost free horizontal refrigerator comprises a refrigerator body. The refrigerator body comprises a shell and a first inner container, wherein the first inner container is fixed in the shell. An insulating layer is arranged between the first inner container and the shell. A second inner container isarranged in the first inner container. An air duct is formed between the second inner container and the first inner container. The air duct is provided with an evaporator and a fan. The second inner container is provided with a return air inlet and an air outlet which are in communication with the air duct. The double containers air-cooled and frost free horizontal refrigerator is used for refrigerating food.

The invention discloses a dual-compound wear-resisting hammer comprising a hammer handle and a hammer body; the hammer body is formed by compound casting of two kinds of metal liquids, and the hammer body is in casting connection with the solid hammer handle to form the hammer. The manufacturing method includes the following steps: step 1, manufacturing and casting a sand mold according to a structure of the hammer; step 2, processing the hammer handle with a low-alloy steel blank material, and preburying one end of the hammer handle into the casted sand mold of the hammer; step 3, selecting high-chromium cast iron and carbon steel, and carrying out quantitative pouring in sequence; and step 4, carrying out heat treatment. The dual-compound wear-resisting hammer not only can improve wear resistance of the hammer but also allows the hammer body and the hammer handle to be combined closely and not generate cracks, casting defects are overcome, the product yield is improved, the cleaning workload is reduced, and the quality and the service life of the hammer are improved substantially.

The invention discloses a small-volume horizontal frostless refrigerator which comprises a refrigerator body and a door body, wherein the refrigerator body is internally provided with an air duct system; the air duct system comprises an evaporator, a supply fan, an air intake duct and an air return duct; the evaporator is located in a cavity of the evaporator; a fan cover covers in a chamber; an evaporator temperature sensor, a defrosting heater and a defrosting protector are arranged on the evaporator; an evaporator water collection disk is arranged below the evaporator; the air intake duct comprises a plurality of air intake sub-ducts arranged in an interlayer of the fan cover; the air intake sub-ducts are dispersed and distributed at the periphery by taking the supply fan as a center; an inlet end of each air intake sub-duct is communicated with the supply fan; an outlet end of each air intake sub-duct is connected with an air outlet; the air outlets are distributed at the upper part, the middle part and the lower part of the front side of the fan cover. The refrigerator has the advantages that the purpose of automatic defrosting can be achieved on the premise of low cost.

A manually activated Peltier device was placed in direct contact with a cortical slice. Seizures terminated within seconds of the onset of cooling, sometimes preceding a detectable drop in temperature measured near the top of the slice. Activation of the Peltier did not stop seizures when slices were no longer in direct physical contact with the device, indicating that this was not a field effect. When cooling was shut off and temperature returned to 33° C., the bursting sometimes returned, but a longer term suppressive effect on seizure activity could be observed. In two experiments, a custom computer program automatically detected seizure discharges and triggered a TTL pulse to activate the Peltier. In these experiments the Peltier automatically terminated the slice bursting in less than four seconds. When the Peltier device was placed in contact with the normal, exposed cortex of a newborn pig, we found that the cortical temperature rapidly decreased from 36° C. to as low as 26° C., at a depth of 1.7 mm below the cooling unit. Therefore, local cooling may rapidly terminate focal paroxysmal discharges and might be adapted for clinical practice.

The invention provides a stator water cooling device of an external rotor permanent magnet synchronous machine. An internal group of ring-shaped cooling water channels and an external group of ring-shaped cooling water channel are installed on the stator iron centre with a shaft of an machine as the center; two groups of ring-shaped cooling water channels are both formed by uniformly distributingat least six pipelines as a ring; a first and a second ring-shaped channels respectively communicated with the internal and external groups of cooling water channels are installed in a back end coverof the machine; a third ring-shaped channel communicated with the internal and external groups of cooling water channels is installed at the front end cover of the machine; a water inlet channel and awater outlet channel are installed in the shaft of the machine, the water inlet channel is communicated with the first ring-shaped channel, and the water outlet channel is communicated with the second ring-shaped channel. The invention can directly cool the inner heat source of the external rotor, and has the characteristics of quick cooling speed, high efficiency, compact structure, simple and convenient technology.

The invention relates to a method for preparing spherical metal, in particular to a method for preparing spherical metal powder under the positive pressure cooling atmosphere environment. The method comprises the following steps that (1) a plasma generator is prepared, and the plasma generator is placed above a cavity; (2) prepared to-be-nodulized powder raw materials are fed into the plasma generator, irregular to-be-nodulized powder raw materials heated by plasmas sent out from the plasma generator generate nodulizing under the effect of surface tension, and quick heat exchange with cooling gas and quick solidification after the to-be-nodulized powder raw materials enter the positive pressure environment are carried out; and (3) cooling air flow is fed into through a cooling air flow pipe, the to-be-nodulized powder raw materials are cooled and solidified under the effect of the cooling air flow to form spherical powder, and the cooled powder is collected through a container. The prepared metal powder is high in degree of sphericity, the interior is compact and fewer in defect, the mobility is good, and the method is suitable for short-period small-batch nodulizing production of multi-component alloy powder.

A molding system for molding a micro pattern structure includes a mold; a mold insert 6 having a micro pattern, the mold insert 6 being fixed to the mold; and a micro heating element 30 having a micro heater 32 between the mold and the mold insert 6, the micro heater 32 being formed in an integrated manner by using a MEMS process; wherein the amount of Joule's heat produced by the micro heater 32 is controlled by controlling the amount of electricity applied to the micro heater 32 so as to control a temperature of the mold insert 6. A method for fabricating the mold insert 6 for molding the micro pattern structure, the mold insert 6 being heated by a micro heater 32, includes the steps of: coating a photoresist on a back side of either the mold insert 6 or a plate 40 fixed onto the mold insert 6; patterning the photoresist by removing a part of the photoresist corresponding to the micro heater 32 using a lithography process; coating a material for forming the micro heater 32; and removing the residual photoresist.

The invention relates to a biodegradable iron-zinc alloy and a preparation method thereof, and belongs to the technical field of design and manufacture of biomedical iron-zinc alloys. The iron-zinc alloy consists of 80-95% of iron and 5-20% of zinc according to the mass percentage. The preparation method comprises the steps: preparing an iron powder and a zinc powder according to the designed components, carrying out ball milling for more than 20 h at the rotational speed of 240-400 r/min under protection of argon gas, to obtain an iron-zinc alloy powder; then using the iron-zinc alloy powder,and under the protection of argon gas, adopting a selective laser sintering process, controlling the laser power to 100-200 W, controlling the scanning rate to 10-30 mm/s, controlling the sintering temperature to 750-1400 DEG C, controlling the light spot diameter to 80-120 [mu]m, and thus preparing the iron-zinc alloy. The biodegradable iron-zinc alloy is molded by combining mechanical alloyingwith selective laser sintering. The biodegradable iron-zinc alloy has suitable degradation rate, high mechanical strength and good biocompatibility, and has a good application prospect in the field ofbone tissue repair.

The invention relates to a portable medical cold compress device which comprises a host and a cold compress bag, wherein a water circulating module, a refrigerating module and a detection control module are arranged in the host; the water circulating module comprises a water tank, a heat exchanger, an impeller pump, a three-way reversing valve and a two-way valve; the refrigerating module mainly comprises a micro compressor, a condenser, a throttle valve, an evaporator and a fan; the detection control module mainly comprises a temperature sensor, a pressure sensor, a power supply and a control circuit on the basis of ATmega32; the detection control module detects the temperature and the pressure inside a liquid circuit of the water circulating module, compares the detected temperature and pressure with set cold compress temperature and pressure, enables the water circulating module to operate in different modes and controls the refrigerating module to be started or shut down. The portable medical cold compress device is rapid to refrigerate, is controllable in the cold compress temperature, time and pressure, can implement multi-parameter regulation and is suitable for treatment in hospitals and outdoor on-site rescue.

The invention relates to a laser surface processing method of a part and a test piece in a liquid medium, especially to a metal surface laser processing method in a liquid medium with excellent treatment structure and special surface performance by the utilization of a laser preparation means. The concrete implementation process is as follows: the part or test piece is immersed in a container filled with some liquid, and a laser terminal permeates through a liquid water film on the surface of the part or test piece and irradiates on the surface of the test piece or part to be processed. Different requirements for processing the part or test piece can be realized through adjusting height of liquid level, speed of liquid flow and temperature. The method can be used as a method for optimizing laser processing structures and also can be used to preheat the part or test piece to be processed, so as to obtain ideal surface mechanical properties and special functions.