511results about How to "Shorten cooling time" patented technology

Disclosed herein is a method of cleaning oxide from a surface in the fabrication of an integrated device using reducing radicals and UV radiation. For silicon surfaces, the cleaning may be performed at a temperature at which a hydrogen-terminated passivated surface is stable, such that the surface remains protected after loading into the chamber until the cleaning is performed. Performing the cleaning at a lower temperature also consumes a reduced portion of the thermal budget of a semiconductor device. Epitaxial deposition can then be performed over the cleaned surface.

The invention relates to a low-temperature scouring and bleaching assistant and a preparation method and application thereof. The low-temperature scouring and bleaching assistant is a mixed assistant formed by 25-60 percent by weight of low-temperature oxidation bleaching activating agent and 40-75 percent by weight of matched scouring agent, wherein the low-temperature oxidation bleaching activating agent consists of sodium nonanoyloxy benzene sulfonate, an activating agent promoter, a bleaching promoter and ammonium polycarylate; and the matched scouring agent consists of an emulsifying agent, a penetrating agent, a chelated dispersing agent, a defoaming agent and water. Cellulose fiber unfinished textiles treated by the low-temperature scouring and bleaching assistant have better whiteness, capillary effect, strength and hand feeling than the performances of textiles treated by the traditional process. Compared with the traditional method, the invention can effectively save the consumption of steam and power, reduce the treatment pressure of sewage and reduce the treatment expense of the sewage.

The invention discloses one dosage type low temperature scouring and bleaching agent which comprises a surface active agent, a hydrogen peroxide activator, a bleaching synergist, a chelating agent, a hydrogen peroxide stabilizer, a defoamer and a filler in a mixing mode. The one dosage type low temperature scouring and bleaching agent can be used for scouring and bleaching cotton, cotton blend knitted fabric or cotton loose fiber in a low temperature bath of 60 DEG C- 85 DEG C and cotton or cotton mixed and blended yarns in a low temperature bath of 80 DEG C -95 DEG C and for cold pad-batch processing of cotton fabric. The one dosage type agent is a solid product which is convenient to pack and transport. One agent can replace more than three agents such as alternative scouring agent, hydrogen peroxide activator, chelating agent, brightening agent and oxygen bleaching stabilizer during processing, which is convenient to feed and process. The one dosage type low temperature scouring and bleaching agent is widely applicable to processes such as scouring and bleaching in bath and cold pad-batch processing.

The invention relates to a method of environment-protective low-temperature scouring and bleaching used for textile dyeing and finishing, comprising the following steps: a dyeing and finishing solution which consists of low-temperature scouring and bleaching promoter composition, 25-30% of hydrogen peroxide and caustic soda, with the mass percentage of 2:8-12:2.5-3 is prepared; subsequently, the dyeing and finishing solution is used for processing cotton knitted fabric with the bath proportion of 1:8-15, the temperature of 75-80 DEG C and the time of 40-60s. The method carries out scouring and bleaching one bath processing at the temperature of 75-80 DEG C, with the scouring and bleaching effect achieving the whiteness and capillary effect standard of the traditional high-temperature alkali-oxygen one bath process at the temperature of 98-100 DEG C or even 130 DEG C; furthermore, the cost is low, the processing time is saved, and the possibility of wrinkle of cotton and cotton blended fabric (such as blended polyurethane and cotton) is reduced.

The invention relates to a porous carbon composite material for adsorbing CO2 and a preparation method and application thereof. The material comprises the following components in parts by weight: 100 parts of organic precursor, 1-2 parts of catalyst, 0-300 parts of inorganic template agent and 15-200 parts of polyethyleneimine. The organic precursor, the catalyst and the inorganic template agent are mixed and aged, and then the porous carbon composite material for adsorbing the CO2 is obtained after the processes of drying, carbonization, inorganic template agent removal and the loading of the polyethyleneimine. The material is arranged in a fixed bed adsorption tower to adsorb carbon dioxide. Compared with the prior art, the invention has the advantages of high adsorption capacity, high adsorption selectivity, good high-temperature adsorption effect and good absorption-desorption narrow temperature operation, and water has small influence on the adsorption, and even promotes the adsorption of the carbon dioxide.

The invention discloses a low-temperature diffusion welding method for metal materials, comprising the following steps: 1) preparation of diffusion welding materials: selecting a metal plate material which can implement own nanosized surface as raw material for the diffusion welding, and polishing the surface to be welded through a mechanical method to meet certain requirement on roughness; 2) nanosize treatment on own surface: using a own surface nanosize method based on surface severe plastic deformation principle to prepare a nano structure surface layer on a surface of the plate material; 3) diffusion welding: cutting the surface nanosized plate material processed in the step 2) into proper size, mechanically polishing the nanosized surface to meet the roughness required by the diffusion welding, and preparing for performing low-temperature diffusion welding. The nanosized surface is contacted and placed in vacuum or reducing atmosphere, sequentially pressurizing and warming up to perform diffusion welding. The low-temperature diffusion welding method for the metal materials can reduce production cost on low-temperature welding and improve production efficiency.

The invention provides an air supply control method and device of an air-cooled refrigerator. The air supply control method of the air-cooled refrigerator comprises the steps that the actual temperature in a cold storage chamber and actual temperature in a freezing chamber are detected through a first temperature sensor and a second temperature sensor which are arranged in the cold storage chamber and the freezing chamber correspondingly; whether the actual temperature in the cold storage chamber is larger than or equal to the preset turn-on temperature is judged, and if yes, an air door is controlled to be opened at a preset angle, and a fan is controlled to operate at a first rotating speed; whether the actual temperature in the cold storage chamber is smaller than or equal to the first turn-off temperature is judged, the actual temperature in the freezing chamber is larger than the second shut-down temperature, and if yes, the air door is controlled to be closed and the fan is controlled to operate at a second rotating speed. According to the scheme, by shortening the negative pressure time of the cold storage chamber and reducing the negative pressure degree of the cold storage chamber, the condensation phenomenon in the cold storage chamber can be effectively relieved, and the problem that condensation affects the service life and the refrigeration effect of the refrigerator is avoided.

The invention discloses a phase change energy storage liquid-cooled plate, a battery pack active heat management system and a control method. The battery pack active heat management system comprises battery modules, a temperature sensor, a phase change energy storage liquid-cooled plate, a thermal conductive glue, a battery management system, a throttle opening sensor, a brake opening sensor, a speed sensor, temperature sensor control harnesses, a power harness, other sensor harnesses, a control valve control harness, control valves, and a water pump; the battery modules and the phase change material energy storage liquid-cooled plate are connected through the thermal conductive glue by stickiness; the phase change energy storage liquid-cooled plate and the battery modules are connected tothe temperature sensor; the temperature sensor is connected to the battery management system through the control harnesses; the throttle opening sensor, the brake opening sensor and the speed sensorare connected to the battery management system through the control harnesses; and the battery management system controls the water pump and the control valves according to the information transmittedfrom the sensors to control the overall temperature rise of the battery pack, so as to increase the consistency of the battery pack. The invention has the characteristics of high flexibility, good heat dissipation effect and strong adaptability.

The invention relates to a steam sterilizing process for the disinfection of medical appliances in hospital, and the steam sterilizer employing the steam sterilizing process, which comprises the steps of vacuumizing, preheating, sterilizing and cooling down. The steam sterilizer comprises a steam sterilizing box, a valve group, an air filter, a steam generator, a vacuum pump and an automatic control system.

The invention belongs to an online washing method used for the field of biological pharmacy, and particularly relates to a water-saving cooling type online washing method. The online washing method is used for cleaning and cooling of reaction tanks and pipes in the field of biological pharmacy. The water-saving cooling type online washing method is a full-automatic online washing method for the reaction tanks and the pipes. The water-saving cooling type online washing method includes the following steps: 1, affirming that washing conditions are met before washing is carried out; 2, carrying out washing through purified water; 3, carrying out blowing through compressed air; 4, carrying out washing through alkali liquor; 5, carrying out blowing through compressed air; 6, carrying out washing through water for injection; 7, carrying out blowing through low-temperature compressed air; 9, finishing. The defects of an existing online washing method are overcome; on the basis that the washing effect is guaranteed, the cooling time after washing is shortened, and meanwhile the aims of saving energy, reducing consumption and saving water can be achieved.

The invention relates to an auxiliary agent composition used in a low temperature one-bath scouring and bleaching process for cotton textile and application thereof, belonging to the technical field of textile printing and dyeing. The auxiliary agent composition comprises, by weight, 10 to 15% of a hydrogen peroxide activator, 2 to 5% of low temperature activating catalyst sustained release capsule, 10 to 15% of a chelating agent, 30 to 40% of diatomite, 10 to 15% of a surfactant and 19 to 31% of a bulking agent. The invention also provides a low temperature one-bath scouring and bleaching process for cotton textile. The process comprises the steps of adding an effective amount of the auxiliary agent composition, hydrogen peroxide and caustic soda into cotton textile and carrying out scouring and bleaching at a temperature of 55 to 60 DEG C for 45 to 60 minutes. According to the invention, cooperative utilization of the auxiliary agent composition, hydrogen peroxide H2O2 and caustic soda enables the low temperature one-bath scouring and bleaching process in the invention to be realized and scouring and bleaching one-bath treatment at or below a temperature 60 DEG C to be carried out, and the effects of scouring and bleaching by using the process provided in the invention are identical with the whiteness and capillary effects of conventional high temperature alkali hydrogen peroxide one-bath process carried out at a temperature of 98 to 100 DEG C, or even at 130 DEG C.

The invention discloses a belt transportation system which comprises a belt transportation mechanism, a belt detection device, a monitor device, belt deviation adjusting mechanisms and a belt cooling mechanism. The belt transportation mechanism comprises a belt and belt supporting components. The belt detection device comprises a routing inspection mechanism, temperature detection sensors and belt deviation detection modules. A routing inspection sliding mechanism and a sliding drive mechanism are arranged on a rack. The routing inspection mechanism comprises a routing inspection box, a smoke detection sensor, a gas detection sensor and a fixed camera. The monitor device comprises a control device, a wireless power supply module, a cooling control mechanism and a deviation adjusting drive mechanism. The belt transportation system is simple in structure and convenient to implement; the belt transportation work condition is detected in real time; the belt is adjusted and cooled; belt deviation or high-temperature work is prevented from bringing potential safety hazards to workers and coal mine transportation; continuous transportation of the belt is achieved; and the coal production efficiency is improved, and labor intensity is relieved.

The invention relates to a solar photovoltaic battery manufactured on modified flexible substrate with high light transmittance, which belongs to the field of flexible amorphous silicon film solar cell manufacture technology. The invention aims to improve the photoelectric conversion efficiency and is manufactured by following steps: selecting a modified PI (polyimide) material with light transmittance of 90 to 93% as the substrate, changing the lamination structure of an amorphous silicon PIN film, depositing a transparent conductive oxide (TCO) thin film by sputtering at a temperature above 350 DEG C, and manufacturing single-junction or multi-junction flexible amorphous silicon battery by using the PI substrate with high light transmittance. The invention has the positive effects that the modified substrate in the manufacture and application does not deform in four hours at a temperature between 350 to 400 DEG C, thus significantly improving the photoelectric conversion efficiency and the performance price ratio of the flexible amorphous silicon solar battery.

The invention discloses a system and method for vehicle-used battery thermal management. The system adopts the structure that the output end of a water tank is connected in series with a liquid circulating pump through a pipeline; a refrigerator is fixedly arranged at the upper part inside the water tank; a flat aluminum tube is wound among single batteries; one end of the flat aluminum tube is connected with the liquid circulating pump, and the other end of the flat aluminum tube is connected with the input end of the water tank; a silica gel heating sheet is embedded between the flat aluminum tube and the biggest surface of each single battery; a temperature sensor is arranged on a vehicle-used battery; a fan is arranged outside a battery box and faces an air inlet; a battery control unit is connected with the temperature sensor through a control wire, connected with the fan through a control switch S1, connected with the liquid circulating pump through a control switch S2, connected with the refrigerator through a control switch S3, and connected with the silica gel heating sheet through a control switch S4. The system for vehicle-used battery thermal management has the advantages that two cooling systems are adopted; when the two cooling systems work simultaneously under a high-temperature condition, the effect of heat dissipation can be improved, and the period of heat dissipation can be shortened; if one cooling system breaks down, the other cooling system can still work.

The invention provides an umbilical cord tissue cryopreservation and resuscitation method. The method comprises the following steps: S1, cutting umbilical cord tissues to obtain first tissue strips; S2, immersing the first tissue strips in a vitrification solution, and then directly cryopreserving the first tissue strips to obtain second tissue strips; and S3, resuscitating the second tissue strips to obtain third tissue strips, wherein the vitrification solution includes a first vitrification solution, a second vitrification solution and a third vitrification solution, and the step S2 includes the following processes: sequentially immersing the first tissue strips in the first vitrification solution, the second vitrification solution and the third vitrification solution, transferring thefirst tissue strips into liquid nitrogen, and cryopreserving the first tissue strips to obtain the second tissue strips. The umbilical cord strips are cryopreserved and resuscitated through a vitrification technology, so the operation time is shortened, the cryopreservation efficiency is improved, and the necrosis rate of the umbilical cord tissues in the cryopreservation and resuscitation processis reduced.

A samarium cobalt permanent magnet vacuum sintering furnace comprises a vacuum-pumping system, a furnace body, a graphite electric heater, a temperature control device, a fan cooling coil pipe and a PLC system. The vacuum-pumping system comprises a first roots pump, a second roots pump, a slide valve pump and a vacuum-pumping pipeline and can be adjusted and controlled. The furnace body comprises a sealing hearth composed of a heat insulation layer, a front door sealing pad and a back door sealing pad. A plurality of evenly-distributed graphite heating frame plates are arranged in the sealing hearth. A plurality of thermocouples which detect temperature of the sealing hearth are evenly arranged between the graphite heating frame plates. The fan cooling coil pipe is arranged at the back end of the sealing hearth. The vacuum-pumping pipeline is arranged between one side of the sealing hearth and the fan cooling coil pipe. The vacuum-pumping system can select different vacuum degrees, the graphite heating frame plates and the temperature-detecting thermocouples which are evenly arranged in the heating hearth monitor temperature in the furnace, and a high-temperature sintering zone, stable temperature and vacuum degree are formed. Permanent magnet product quality is improved, sintering furnace productivity effect is improved, product pass percent is improved by 30%, production efficiency is multiplied, and total energy is saved by more than 60%.

The invention relates to a novel composite surface-enhanced spiral bevel gear production process system based on a current anti-fatigue manufacturing method system and integrating induction quenching and gas nitriding. The invention aims to provide a composite surface-enhanced cyclo-palloid spiral bevel gear manufacturing method with heated precision of 4 to 6 levels and achieving the purpose that the theory contact zone meshed strength is meshed with carburizing and quenching strength. The invention aims to further provide a new spiral bevel gear production technology which can not only embody the current anti-fatigue high-end gear manufacturing method purpose, but also agree with the complete software and hardware match of a roadmap of heat treatment technology development in China.

The invention discloses a shoe material thermal-laminating process. The shoe material thermal-laminating process comprises the following steps that 1, shoe materials to be processed are prepared, wherein the shoe materials include a first shoe material and a second shoe material which are to be laminated, a zone to be laminated of the first shoe material and / or a zone to be laminated of the second shoe material undergoes adhesive coating treatment, an adhesive layer is formed through the adhesive coating treatment, and the zones to be laminated and / or an adhesive contain moisture; 2, the zone to be laminated of the first shoe material and / or the zone to be laminated of the second shoe material obtained in the step 1 are correspondingly adhered, and adhesion is kept to obtain a shoe material adhered part; 3, the shoe material adhered part in the step 2 is subjected to microwave heating heat treatment through a microwave heating device to make the first shoe material and the second shoe material bonded and fixed together, and then the first shoe material and the second shoe material which are bonded and fixed together are subjected to low-temperature cold-shaping treatment. The shoe material thermal-laminating process has the advantages of being short in consumed time and simple and reducing the energy consumption.

The invention discloses a cabinet comprising a cabinet body. An air-conditioner used for cooling is arranged outside the cabinet body. An air blowing channel and an air returning channel connected with an air blowing port and an air returning port respectively are arranged on the cabinet body. A first air flow control device is arranged at the connection position of the air blowing channel and the cabinet body, and a second air flow control device is arranged at the connection position of the air returning channel and the cabinet body. The cabinet further comprises a temperature detecting device and a control module which is connected with the temperature detecting device, the first air flow control device and the second air flow control device. By the design, a sealed cooling air circulation loop can be formed between the cabinet body and the air-conditioner, load area of the air-conditioner is reduced, and cooling time of the air-conditioner is reduced; and air flow control devices are arranged at connection positions of the cabinet body with the air blowing channel and the air returning channel, air blowing and air returning are realized accurately, the air flow can be adjusted in real time according to temperature changes inside the cabinet body, and good protection affection to working environment of inter parts of the cabinet body is realized.

The invention discloses a refrigerator and a control method thereof. The control method is characterized in that a compressor and a flowing path and the flowing time of a refrigerant outputted to N evaporators are controlled in a plurality of manners according to the preset target temperature control parameters of M temperature-range chambers, thus each of the M temperature-range chambers can reach the preset target temperature, and as a result, that the temperature variation control can be performed only for a special temperature-variation chamber according to existing control rules based on a temperature-variable refrigerator and the personalized customization demand of a user requiring the combination of different temperature-range chambers cannot be met can be avoided. With the adoption of the method, the demands and settings of the user can be intelligently determined through preset parameters and methods, so that the refrigerator can continuously run in an optimal working condition, and as a result, the technical effects of improving the adaptability and the user experience can be achieved.

The invention discloses a reinforcement construction method and particularly relates to a construction method for reinforcing a large rock slope deep weak structural plane. The construction method comprises the following steps: A, excavating a main tunnel along the direction of the deep weak structural plane of a rock slope, performing temporary support, and then drilling drainage holes on a tunnel soffit; B, excavating branch tunnels from two side walls of the main tunnel to the top wall and bottom wall directions of the deep weak structural plane, performing temporary support and then drilling drainage holes on tunnel soffits; and C, backfilling concretes into the main tunnel and the branch tunnels, and arranging steel bars to reinforce the backfilled concrete, wherein concrete backfilling is at least divided into two following construction period: in the first construction period, the backfilled concretes are backfilled along the peripheral inner walls of the main tunnel and the branch tunnels in a covering way, backfilling layers of the first construction period are formed on the walls of the main tunnel and the branch tunnels after the first construction period of concrete backfilling is finished, and the residual spaces of the main tunnel and the branch tunnels are utilized as grouting galleries; and after the backfilled concretes of the first construction period are solidified, the backfilled concretes of the residual construction period are utilized to fill the whole grouting galleries.

Disclosed is a method for producing a high purity 2-hydroxy-3-naphthoic acid. The method includes a 2-naphthol measuring tank, a caustic soda liquid storage tank, a caustic soda liquid measuring tank, a salt forming reaction vessel, carbon dioxide, a carbonization kettle, a resin separation, a resin solid waste, a dilute sulfuric acid, a neutralization, a filter pressing, a filter cake distillation, a 8% sodium hydroxide, a resin adsorption, an acid eduction, a sewage treatment workshop, a centrifugal dewatering, a pneumatic drying and finishing of a high purity 2-hydroxy-3-naphthoic acid product. The caustic soda liquid storage tank is downwards connected to the caustic soda liquid measuring tank, the caustic soda liquid measuring tank is connected to the salt forming reaction vessel, the salt forming reaction vessel is downwards connected to the carbonization kettle, simultaneously the carbon dioxide is connected to the carbonization kettle, 2-naphthol generated by reaction in the carbonization kettle and 2-naphthol obtained by the filter cake distillation are connected to the 2-naphthol measuring tank, the carbonization kettle is downwards connected to the resin separation, and simultaneously the resin separation is upwards connected to an ethyl naphthol feed liquid and the dilute sulfuric acid and downwards connected to the neutralization and the resin solid waste. According to the method, the whole process is simple, the operation and the usage are convenient, the stability is good, and the reliability is high.

A roll mould for pastafilata cheese, comprising a cylinder having a lateral surface carved with a plurality of narrow, elongated recesses, having substantially equal depths and widths, and communicating, via respective passages with elements for supplying pressurized water, which elements are arranged for momentary operation to eject the contents of the recesses. Preferably, the recesses extend longitudinally to the cylinder and are sized to produce cheesesticks of a weight less than 1 gram.

The invention discloses a pulsed steam sterilization process suitable for sterilizing medical equipment and a steam sterilizer for the steam sterilization process. The sterilization process comprises the following steps of vacuumizing, preheating, sterilizing, performing vacuum drying and the like. The steam sterilizer comprises a steam sterilization box, a valve bank, an air filter, a steam generator, a vacuum pump and an automatic control system. Compared with the prior art, the invention has the advantages that: by the pulsed steam sterilization process and the steam sterilizer thereof, a sterilization apparatus can be transported without packaging, the temperature raising and reduction time of the sterilization is shortened, the sterilization time of the apparatus is shortened, the labor intensity of medical care personnel is reduced, and the disinfection and sterilization are more complete and have a better effect.

The invention discloses an anti-unmanned aerial vehicle system of unmanned aerial vehicle laser weapon. The anti-unmanned aerial vehicle system comprises an onboard sub-system and a ground sub-system,wherein the onboard sub-system comprises a stabilization device, a flight module, a laser weapon module, an onboard data terminal and an onboard task manager, the stabilization device, the flight module, the laser weapon module and the onboard data terminal are all connected with the onboard task manager, the ground sub-system comprises a stabilization control system, a flight control system, a laser weapon control system, a ground data terminal and a ground task manager, and the stabilization control system, the flight control system, the laser weapon control system and the ground data terminal are all connected with the ground task manager. By the anti-unmanned aerial vehicle system, the body type of the laser weapon is greatly reduced, the anti-unmanned aerial vehicle system is more convenient to carry, the consumed energy is far smaller than that of a traditional anti-unmanned aerial vehicle laser defensive system, and the cooling time is greatly reduced; and meanwhile, compared with large-size laser weapon, small-size laser weapon is more flexible and is difficult to observe by an enemy.

The invention discloses an air duct cover plate assembly and a refrigerator provided with same. The air duct cover plate assembly for the refrigerator comprises an air duct cover plate and an air duct foam, wherein a main air outlet is formed in the air duct cover plate; the air duct foam is arranged on the rear surface of the air duct cover plate and internally provided with a main air duct, a fan mounting slot communicated with the main air outlet is arranged on one of the front surface and the rear surface of the air duct foam, the bottom wall of the fan mounting slot is obliquely arranged, a first ventilation hole is formed in the bottom wall of the fan mounting slot, and the fan mounting slot is communicated with the main air duct by the first ventilation hole. The air duct cover plate assembly for the refrigerator, disclosed by the embodiment of the utility, has the advantages of being large in air volume, and small in occupied space, and improving the storage space of chambers.

The invention relates to the field of logistics, in particular to an automatic control feedback cabin and method based on temperature field three-dimensional imaging. A three-dimensional visualizationtemperature field of the whole vehicle is acquired by temperature sensors arranged in the whole vehicle to construct a three-dimensional image, an identification is conducted by means of an RGB colorsystem recognition, a reddish color is selected and the position in the vehicle compartment is marked; the priority is set as one; the dangerous temperature is set as T, and the temperature difference between the temperature at the latest point in time and the dangerous temperature is determined; the smaller value is selected and the position in the vehicle compartment is marked; the priority isset as two; the temperatures are obtained by the temperature sensors periodically, the temperature trend and temperature change within the same time point are determined, and the highest temperature is selected and the position in the vehicle compartment is marked; the priority is set as three; wind division and guiding are conducted through an air inlet pipe by universal air outlets, the air inlet pipe is connected with a cold air source, and the universal air outlets sequentially aim at and blow winds to the positions determined as prior one, prior two and prior three to perform precise cooling.

The invention discloses a method for quickly drying and cooling a lithium ion battery. The lithium ion battery is placed in an oven, and the heat transfer medium is inert gas. Heating steps comprise the steps of inflating the lithium ion battery with inert gas for 10-40 min during heating, maintaining the state for 1-12 h and performing heating, performing vacuumizing, and performing circulation hereunder. Cooling steps include the steps of stopping heating, inflating the lithium ion battery with inert gas for 10-40 min, maintaining the state for 0.5-6 h, performing vacuumizing, and performing circulation hereunder. The method for quickly drying and cooling the lithium ion battery has the advantages of being quick in heating speed, high in cooling efficiency and low in cost.

The invention provides a compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment. The device comprises a gas conveying pipe, a pre-cooling end, a protection cover, a pressure reduction pool and an air exhaust device. The device has the beneficial effects that firstly, the protection cover reduces the surface area of a refrigeration machine exposed in a vacuum cavity and can be used for the ultrahigh vacuum environment; secondly, the protection cover serves as a backflow channel of refrigeration working media, conductance of the backflow channel is improved, it is ensured that liquid refrigeration working media in the pressure reduction pool have the low vapour pressure, and the lower refrigeration temperature is achieved; thirdly, at the initial cooling stage, the backflow channel can be inflated with helium exchange gas so as to rapidly cool the portion of the pressure reduction pool, and the cooling time is shortened; fourthly, due to design of the second segment of the protection cover, the whole heat exchange efficiency is improved; fifthly, the refrigeration device has the beneficial effects of being compact in structure, easy to demount, mount and maintain, adjustable in refrigeration amount and the like.

The invention relates to a vacuum refrigerating tumbling machine, which aims to solve the technical problem that the current vacuum refrigerating tumbling machine is long in refrigerating time and larger in local difference in temperature. The technical scheme adopted is that the vacuum refrigerating tumbling machine comprises a tumbling barrel connected with a frame, a main shaft fixedly connected with the tumbling barrel, and a driving mechanism connected with the main shaft, wherein a refrigerating layer and an insulating layer are sequentially arranged between the inner and outer walls of the tumbling barrel respectively; the key point is that a middle refrigerating cabin is further arranged inside the tumbling barrel along the axis, the middle refrigerating cabin is internally provided with a partition board and is divided into a water inlet cabin and a water outlet cabin through the partition board; the water inlet cabin is communicated with a main water inlet via a first water inlet pipeline while the water outlet cabin is communicated with the water inlet of the refrigerating layer via a first water outlet pipeline, and the water outlet of the refrigerating layer is communicated with a main water outlet through a second water outlet pipeline to form a serial cold water circulating system. The invention has the technical effects that the vacuum refrigerating tumbling machine is uniform in cooling, small in local difference in temperature, fast refrigerating speed and good effect, and 1 / 3 refrigerating time can be shortened, and the quality of meat products can be better ensured.