168results about How to "Large cooling capacity" patented technology

A terminal may be provided with a magnetic regenerator unit using a magnetocaloric effect of magnetocaloric materials and a magnetic cooling system having the same. By a circular magnetic regenerator structure capable of evenly flowing heat transfer fluid and magnetic field and the flow of the heat transfer fluid being changed in the same way, and a magnetic band having a relative permeability, similar to a relative permeability of the magnetic regenerator, high efficiency of a flux generator may be obtained while reducing torque of a rotator. Power consumption for driving may be reduced due to the reduction of the cogging torque, and the magnetic band may be manufactured at a low cost by using inexpensive iron powder.

A waterless blood heater/cooler device directly controlling temperature of blood flowing through an extracorporeal blood circuit. A thermoelectric module is coupled to a supply voltage to generate a temperature difference. A heat exchanger cassette comprising a core and first and second laminar flow guides is in thermal contact (directly or indirectly) with the thermoelectric module. The cassette has a plurality of tubes for carrying parallel channels of the blood. The first and second laminar flow guides provide an inlet and an outlet for coupling to the extracorporeal blood circuit and respective intermediate chambers for receiving respective ends of the tubes in order to guide the blood to and from respective tubes in a substantially laminar flow.

In a vehicle air conditioner, a cooling heat exchanger for cooling air is arranged in the air conditioning case, and a cooling/heating switching heat exchanger is arranged at a downstream air side of the cooling heat exchanger in the air conditioning case. A first bypass passage is provided at one side of the cooling heat exchanger in the air conditioning case, so that air flows through the first bypass passage while bypassing the cooling heat exchanger. A second bypass passage is provided at one side of the cooling/heating switching heat exchanger in the air conditioning case on an opposite side of the first bypass passage with respect to the first heat exchanger, so that air flows through the second bypass passage while bypassing the cooling/heating switching heat exchanger. Accordingly, a size of the air conditioner can be effectively decreased while a maximum cooling capacity can be sufficiently obtained.

An environmental-friendly refrigerant, used in equipments such as refrigerators, air-conditions, and heat pumps, etc., is directly in place of the HCFC-22 refrigerant technology field, and consists of components A, B, and C. The component A is one of ethyl fluoride or 1, 1-difluoroethane or the mixture of the two according to any proportion. The component B is Difluoromethane. The component C is one of isobutane, normal butane, propane and propylene or mixture of two or more of the chemicals according to any proportion. The invention overcomes the disadvantages of the prior art of alternative refrigerant and the deficient compatibility between HCFC-22 compressors and lube, as well as the high GWP. The invention provides a refrigerant with good environment performance, the thermal parameters of which is similar to that of HCFC-22. The invention can be used directly in the former system of HCFC-22, as well as the HCFC-22 compressor and lube. The unit volume refrigerating capacity is great while the density is small, thus reducing the mass of using and increasing the energy efficiency ratio, as well as saving resources. The refrigerant can be a long-term substitute of HCFC-22.

A cooling circuit of a cooling apparatus for a fuel cell comprises a compressor for compressing a gaseous refrigerant, an external heat exchanger arranged on the downstream side of the compressor and for liquefying the compressed refrigerant, a pressure-reducing means arranged on the downstream side of the external heat exchanger, and an accumulator for storing the refrigerant which cools a fuel cell stack main body. The stack main body is connected to the cooling circuit between the pressure-reducing means and the accumulator and a four-way valve is arranged between the compressor and the external heat exchanger, and between the stack main body and the accumulator in the cooling circuit, and the four-way valve introduces the refrigerant from the compressor to the external heat exchanger during the cooling operation, and introduces it to the stack main body during the warming-up operation.

According to one embodiment of the invention, a method for cooling heat-generating structure disposed in an environment having an ambient pressure includes providing a fluid refrigerant and reducing a pressure of the refrigerant to a first sub-ambient pressure at which the refrigerant has a boiling temperature less than a temperature of the heat-generating structure. The method also includes bringing the refrigerant at the first sub-ambient pressure into thermal communication with the heat-generating structure, so that the refrigerant boils and vaporizes to thereby absorb heat from the heat-generating structure. The method further includes increasing a pressure of the vaporized refrigerant above the first sub-ambient pressure to a second sub-ambient pressure.

A gas liquefaction system comprises a compressor unit, a precooling heat exchanger, a multistage intermediate turbine precooling unit, a first heat exchanger, a final-stage turbine expander, a secondheat exchanger, a throttle valve and a cryogenic liquid storage tank. The second heat exchanger is arranged between the throttle valve and the cryogenic liquid storage tank. The gas liquefaction system comprises a to-be-liquefied gas circuit, a refrigeration working medium circulating process and a precooling working medium circulating loop. According to the gas liquefaction system, under the samesystem power consumption, the final-stage turbine expander expands under the high temperature by changing the liquefaction process form of the cryogenic end so as to obtain the greater cooling capacity; compared with a traditional helium refrigeration hydrogen liquefaction system, a stage of second heat exchanger is further additionally arranged after throttling of the throttle valve so that thedryness of the liquefied gas can be further decreased to zero, full liquid phase running of an outlet pipeline of the second heat exchanger is ensured, the safe effect is achieved, and the equipment cost is saved; and the lowest temperature of the whole gas liquefaction system is improved, improving of the system efficiency is facilitated, and energy sources are saved.

The invention discloses a hydrogen liquefying device. The hydrogen liquefying device comprises a hydrogen intake pipe, a heat exchanger A, a heat exchanger B, a heat exchanger C, a flash tank and a liquid hydrogen storage tank for communicating in sequence. The invention further discloses a hydrogen liquefying method, comprising the following steps: (S1) hydrogen is precooled; (S2) orthohydrogen and parahydrogen are converted and liquefied; (S3) one part of liquid hydrogen serves as supercooled gas to input back into the heat exchanger C; (S4) hydrogen steam and the liquid hydrogen are separated by the flash tank; and the liquid hydrogen is prepared and stored; and (S5) unliquefied hydrogen is recovered. The hydrogen liquefying method is simple in flow, flexible in adjustment, reliable in work, convenient to maintain and low in energy consumption.

A method and a system for the preparation of compressed air having a heat exchanger (system heat exchanger) which is in communication with a pressure source on the inlet side on the compressed air side and which is in communication with a system or unit on the outlet side on the compressed air side which is to be supplied with cooled compressed air and including at least one heat exchanger (air conditioning system heat exchanger) which is in communication with a pressure source on the inlet side on the compressed air side and which is in communication with additional components of an aircraft air conditioning system on the outlet side on the compressed air side. Provision is made for the system heat exchanger and the at least one air conditioning system heat exchanger to have a common inlet for supply with ram air or environmental air and for the system heat exchanger to be connected on its outlet side on the compressed air side via a closable line to the line system on the compressed air side in communication with the at least one air conditioning system heat exchanger or to the at least one air conditioning system heat exchanger itself.

The invention discloses a cold-storage agent and a preparation method thereof. The cold-storage agent comprises the following components by weight percent: 2%-20% of polyacrylate, 2%-20% of edible oil, 2%-20% of vinyl acetate copolymer, 2%-20% of starch, 2%-16% of sodium nitrite and the balance of water. The preparation method comprises the following steps: firstly, correctly weighing polyacrylate, edible oil, vinyl acetate copolymer, starch, sodium nitrite and water according to the proportion and then adding into a mixer; heating to 32-40 DEG C, stirring for 1-2 hours for evenly mixing the former components, cooling to 20-24 DEG C, so that the mixture is of a jelly shape; and packaging with a plastic bag or plastic box. The cold-storage agent has good cold-storage effect, large cold-storage amount and long cold-storage period as well as energy conservation and emission reduction; and the preparation method is simple, has wide raw material source and low cost, is safe and reliable, and can be repeatedly used.

The invention provides a small skid-mounted evaporation gas reliquefaction and recovery device for liquefied natural gas. The small skid-mounted evaporation gas reliquefaction and recovery device comprises a cryogenic storage tank (1), a regenerative cryo refrigerator (3), an externally-finned condensing heat exchanger (4), a pressure testing device (5), a temperature testing device (6), a heating device (7) and a control system (8). Real-time monitoring and stepless regulation can be performed on cryogenic temperature and output cold of the cryo refrigerator according to requirements on actual pressure and heat loads inside the cryogenic storage tank, and zero consumption of an LNG (liquefied natural gas) storage tank system can be realized; pumpless circulation of gas liquid flow inside the device can be realized by relying on self differential pressure and gravity; the small skid-mounted evaporation gas reliquefaction and recovery device is low in system energy consumption, compact in structure, simple in technology process, high in reliquefaction efficiency and low in operation and maintenance costs, and skid mounting of the device can be realized.

The invention relates to a fruit and vegetable e-commerce cold-chain fresh-keeping container which comprises an outer-layer container, an inner-layer container, a sealing cover and a low power consumption internal circulation fan, wherein the inner-layer container is arranged inside the outer-layer container with a gap; the outer-layer container and the inner-layer container share one same sealingcover; a lifting handle is manufactured at the upper part of the sealing cover; the sealing cover tightly seals and covers the inner-layer container and the outer-layer container simultaneously; boththe material and the internal structure of the container cover are identical to those of the outer-layer container; on the inner side of the inner-layer container, a fresh-keeping adjusting assemblyis mounted at a ventilation window corresponding to the fan; the fresh-keeping adjusting assembly is a frame; the frame is made of a net and is opened front and back; a front opening corresponds to the ventilation window; an NO slow release block, a plant essential oil slow release block and a 1-mcp slow release block are placed in the fresh-keeping adjusting assembly from top to bottom in sequence; and an adsorption block is mounted inside the ventilation window corresponding to a sealing gate. Due to addition of slow release materials, environments in sub-containers can be adjusted, meanwhile, real-time gas regulation and control on micro environments in the containers can be implemented, and purposes of gas adjustment and corrosion prevention and environment protection and security canbe achieved.

A small and medium frostless refrigeratory for keeping fresh of farm and sideline products is provided, which comprises a refrigeration compressor unit (1), a vaporize comb (2) and a reducing valve (3). The vaporize comb (2) is communicated with the refrigeration compressor unit (1) to form circulation, which is provided with the reducing valve (3); the vaporize comb (2) is arranged in a shallow pool (5) at bottom of a refrigeratory (4); the shallow pool (5) is internally provided with secondary refrigerant. The refrigeratory (4) is also internally arranged with a circulating pump (6) and a cascade device of a shower (7). The refrigeration compressor unit (1) sends the refrigerant to the vaporize comb (2) through the reducing valve (3) and the refrigerant can return to the refrigeration compressor unit (1) after absorb heat; the circulating pump (6) sends the secondary refrigerant to the shower (7) to spray in the refrigeratory (4). The invention is characterized in that: the cold volume is completely exchanged in the refrigeratory, so the invention has no dissipation and lose, large cold volume storage and is able to maintain a relative constant temperature of the refrigeratory, thereby reducing the times for opening and closing the refrigeration compressor, saving energy, prolonging the service life of the equipment, having no forest and high humidity, etc.

The invention discloses a green mixed refrigerant, comprising 20-60 wt% of 2,3,3,3-tetrafluoro propylene or trans-1,3,3,3-tetrafluoro propylene, 5-30 wt% of 1,1-difluoroethane or 1,1,1,2-tetrafluoro ethane, and 35-60 wt% of difluoromethane. The preparation method is characterized by physically mixing the above ingredients according to corresponding ratio at normal temperature. According to the invention, because the volume refrigerating capacity of the green mixed refrigerant is very close to that of HCFC-22 and the condensation pressure of the green mixed refrigerant is lower than that of R410A, the green mixed refrigerant can be directly filled in existing refrigeration, air-conditioning or heat pump sets which use HCFC-22; and when HCFC-22 is replaced, the components and pipeline of the system have no need of redesigning. The green mixed refrigerant can be an alternative refrigerant to HCFC-22 and R410A.

The invention discloses a brown beech mushroom refrigeration cold-insulation agent and a preparation method thereof, wherein the cold-insulation agent is formed by combining a thickening agent formed from soluble chitosan and soluble starch with a cooling capacity reinforcing agent formed from ethanol and glycerol by adding auxiliaries formed from soluble amine or amine salt and soluble acetate and water. The brown beech mushroom refrigeration cold-insulation agent disclosed by the invention is not iced at low temperature; the limited space of a packaging box can be effectively utilized; the transportation cost is reduced; a better effect is played in a long time; good flowability is still kept at minus 30 DEG C; due to addition of the auxiliaries, the cooling capacity storage amount is further increased; the cold-insulation agent disclosed by the invention is low in use amount and also has the advantages of being low in corrosivity and environmental influence; and in addition, if packaging is leaked, effective components of the cold-insulation agent have good effects on fresh keeping and growth of products.

The invention discloses a cold and hot ablation apparatus with cold and heat accumulation devices, the apparatus comprises a refrigerant container, a gas main and a cold/heat probe or a conduit, wherein the refrigerant container is connected with the gas main which is divided into two pipelines, one pipeline is connected with a gas inlet cold pipe, the other pipeline is connected with a gas inlet hot pipe, and the gas inlet cold pipe passing through a cold-accumulating heat exchanger is jointed with the gas inlet hot pipe passing through a heat-accumulating heat exchanger into one gas inlet pipe which is then is connected with the cold/heat probe or the conduit. One way of refrigerant in the refrigerant container used by the apparatus is pre-cooled firstly by the cold-accumulating heat exchanger, and then the refrigerant is used for cooling and freezing pathologically changed tissues through the cold/heat probe or the conduit.. The other way of refrigerant passes through the heat-accumulating heat exchanger and then heats the cold/heat probe or the head part of the conduit so that the temperature of the pathologically changed tissues is quickly reduced or the frozen pathologically changed tissues are molten, and then a series of inreversible injuries can be generated so as to achieve the aim of eliminating pathological changes.

Various types of automobile exhaust waste heat generation devices at present are complex in process, high in cost, low in integration level, large in size and low in heat-electricity conversion efficiency. The invention discloses a thermopile which is high in integration level, simple in structure, low in cost and high in reliability; the invention also discloses an automobile exhaust waste heat generation and refrigeration device employing the thermopile as a core part for generation and refrigeration. P-type thermocouple arms formed in the shape of a rectangular cylinder and N-type thermocouple arms are arranged in a staggered manner. A heat-insulation and insulting film material is arranged between the adjacent thermocouple arms in an attaching manner for isolation, so that the convection of air is eliminated, the defect of the reduction of the temperature difference between cold and hot surfaces caused by radiation is overcome, and the heat-electricity conversion efficiency is improved. The electric connection between the thermocouple arms is achieved through flexible heat-conduction and electric-conduction materials, so that a thermal stress is alleviated, the adverse effect of the thermal stress on a product is eliminated, and the problem that the reliability and the service life of the product are affected seriously, caused by the deformation and cracking of the thermopile and falling of welding spots between the thermocouple arms which are caused by the thermal stress, is solved.

The invention discloses a seasonal cold-accumulation all-year cooling system and an operating method thereof, and belongs to the technical field of air conditioners. The system comprises a primary cold-accumulation loop, a secondary cold-accumulation loop, a cold-release cooling loop, a natural cooling loop and a refrigerating cooling loop. In winter, equipment is cooled by the natural cooling loop, and the primary cold-accumulation loop and the secondary cold-accumulation loop generate low-temperature cold energy to store during power consumption valley in winter. In summer and transition seasons, the equipment is cooled by the cold-release cooling loop, and the refrigerating cooling loop is reserved in summer. The seasonal cold-accumulation all-year cooling system utilizes a winter valley electricity price to refrigerate and store cold, is great in cold-storage density, is high in quality, and is suitable for cooling various kinds of electronic equipment, wind generating sets, data machine rooms, and the like.

The invention provides an apparatus (1) for magnetic resonance (MR) examination of a subject (S), comprising: an examination region (3) for accommodating the subject (S) during the MR examination; a radio-frequency system (5) for transmission of a radio-frequency (RF) signal or field into the examination region (3) during the MR examination; and a temperature control system (6) for controlling the temperature of the subject (S) in the examination region (3) during the examination. The temperature control system (6) is configured to actively control or regulate an environment of the subject (S), and thereby the temperature or thermal comformt of the subject (S) based upon a detected and/or an expected temperature of the subject (S) during the MR examination. The invention also provides a method of controlling thermal comfort of the subject (S) during an examination of the subject (S) in a MR apparatus (1), comprising the steps of: estimating and/or detecting a temperature of the subject (S) during the MR examination, and actively controlling or regulating the environment of the subject (S) based upon the estimated and/or detected temperature of the subject (S) during the MR examination.

A passive cooling system of a nuclear power plant includes a cooling water storage tank configured to store a cooling water therein, a steam generation unit to which the cooling water is supplied from the cooling water storage tank connected thereto, the supplied cooling water being heated to generate a steam, a water cooling heat exchange unit connected to the steam generation unit and provided within the cooling water storage tank, and an air cooling heat exchange unit connected to the steam generation unit and provided outside the cooling water storage tank.