39results about How to "Solve uneven heat transfer" patented technology

A water-cooled reactor comprises an iron core and a conductive coil arranged on the outer side of the iron core, and is characterized by further comprising a cooling water pipe arranged on the inner side or the outer side of the conductive coil, a water inlet and a water outlet are arranged on the cooling water pipe, and heat conduction medium materials are packaged between the cooling water pipe and the conductive coil. By the water-cooled reactor, the defects of high manufacturing cost and stoppage of an existing hollow copper pipe cooling manner and ununiform heat exchange of an existing plate type cooling manner are overcome. The water-cooled reactor with the advantages in the technical scheme can be applied to electronic equipment, such as transformers and the like.

The invention relates to the technical field of heat radiation, particularly relates to a microchannel heat radiator and aims at further increasing the efficiency of the existing heat radiating device of an electronic device. The microchannel heat radiator comprises an upper cover plate, a lower cover plate, a fluid feeding unit, a fluid discharging unit and a plurality of heat exchange units, wherein each heat exchange unit is formed by reversely overlapping two heat exchange plates; each heat exchange plate is internally provided with a plurality of partition plates among which runners for allowing fluids to flow are formed; and the adjacent partition plates are intercrossed to form cavities. The partition plates of the adjacent heat exchange plates are crossed to form crossed and interconnected runners, so that the fluids can pass through different heat exchange plates; and due to the adoption of the flowing way, the flow paths of the fluids in the heat radiator are increased, flow routes are optimized, and heat exchange is more sufficient. In addition, due to the adoption of the design, the fluids in different runners can be mutually converged, hedged and dragged, the interaction between every two fluids can be enhanced, and the heat exchange effect can be improved.

The invention relates to a single-effect evaporator. The technical proposal is that the single-effect evaporator comprises a tube pass and a shell pass. A cylinder body of the tube pass, a sealing end of the tube pass and an upper cover of the tube pass constitute the tube pass, an alkaline liquid outlet, an anti-swirl baffle, a meter inserting tube, a liquid level meter inserting tube, a steam outlet and a liquid level meter alarm port are arranged on the tube pass, a wire mesh demister and a baffle are arranged in the tube pass; an expansion joint which is sleeved with a protective cover of the expansion joint and a protective support connects the upper and the lower cylinder bodies of the shell pass, and the two ends of a short joint of the shell pass are connected with the upper cylinder body of the shell pass and the sealing end of the shell pass; the sealing end of the shell pass is provided with an alkaline liquid inlet; the short joint of the shell pass is provided with a distributing cover, a receiving plate, a distributing plate and a downcomer; the steam inlet is connected with the lower cylinder body of the shell pass through a shell body and the annular plate; the lower cylinder body of the shell pass is provided with a condensate outlet; a tube supporting frame is arranged in the lower cylinder body of the shell pass; the short joint of the tube pass is connected with the lower cylinder body of the shell pass; a tube plate is provided with a heat exchange tube hole, a heat exchange tube penetrates the two ends of the tube supporting frame to be connected with the tube plate, and one end thereof is connected with a distributing tube. The single-effect evaporator improves the stability and the pull-out force of the heat exchange tube and reduces the energy consumption and the production cost.

The invention provides an air conditioner heat exchange system comprising an efficient condenser and a tubular heat exchanger. The efficient condenser integrates condensation and supercooling. Gas from the tubular heat exchanger to an evaporator and liquid from the condenser are subjected to heat exchanging, heat of refrigerating medium from the condenser and heat of refrigerating medium from the evaporator are efficiently utilized, and efficiency of the system is improved; meanwhile, a supercooling zone and a condensation zone in the condenser are communicated with a guide plate, and the structure is compact; the sectional area of a guide channel and open area of guide connectors at two ends of the guide channel are approximately equal, and accordingly the refrigerating medium flows at the guide plate at stable speed and heat exchanging efficiency is greatly improved.

The invention discloses a production device of a pipe body. The production device sequentially comprises a material mixing device, an extruding machine, a cooling device and a cutting machine from thefront to the back according to a technological process; the production device further comprises a pipe body surface detection device at the rear way of the cutting machine; and the cooling device comprises a cooling heat exchange pipeline and a water-cooling groove body assembly. The invention further discloses a method of producing a strengthening pipe body by using the production device of thepipe body. The production device and the method have the advantages that the strength is high, the cutting uniformity is good, and inferior-quality products are monitored on line.

The invention discloses a device and a method for synchronous in-situ measurement of linear displacement and straightness of a guide rail. For an integrated two-dimensional grating and guide rail, a two-dimensional grating is etched on the upper surface of a linear guide rail, and a reading head is embedded in a sliding block. The specific measurement method comprises the steps that when the sliding block moves on the guide rail, the reading head outputs two pairs of orthogonal sine and cosine signals at the same time, the sine and cosine signals are transmitted to an upper computer through anacquisition card after being subjected to filtering and analog-digital conversion, and displacement and straightness are solved on the upper computer through a method of counting edges through high-frequency pulses, wherein the linear displacement of the guide rail is solved through orthogonal signals generated by the grid lines perpendicular to the x axis, and the straightness of the guide railis solved through orthogonal signals generated by the grid lines perpendicular to the y axis. The method has the advantages of small guide rail pair mounting size, high positioning precision, multi-parameter synchronous in-place measurement and the like, and a new method is provided for displacement and straightness measurement of the guide rail.

The invention provides a micro-channel heat exchanger and a heat pump system. The micro-channel heat exchanger comprises a first collecting pipe (1), a second collecting pipe (2), rotary connecting assemblies and a flat pipe (3), the first end of the flat pipe (3) communicates with the first collecting pipe (1), the second end of the flat pipe (3) communicates with the second collecting pipe (2),and the first end of the flat pipe (3) can be rotatably connected with the first collecting pipe (1) through the rotary connecting assembly; and the second end of the flat pipe (3) can be rotatably connected with the second collecting pipe (2) through the rotary connecting assembly. According to the micro-channel heat exchanger, a water bridge between the flat pipe and fins can be damaged, condensate water can be rapidly discharged, the circulation rate of air is increased, and the heat exchange efficiency is improved.

The invention provides a heat exchanger which comprises a first casing, a main shaft and a heating device, wherein the first casing is provided with a first accommodating cavity for accommodating materials; the main shaft penetrates through the first accommodating cavity rotationally and is provided with a second accommodating cavity, and a heat exchanger medium is arranged in the second accommodating cavity; and the heating device penetrates through the second accommodating cavity and rotates synchronously with the main shaft, and a first end of the heating device penetrates out of the main shaft and is connected with a power supply. The heat exchanger effectively solves the problem of uniform heat exchange, and the structure is simple.

The invention discloses an A-type heat exchanger with a variable angle. The A-type heat exchanger comprises heat exchanger plates, a fan, an adjustable connecting piece and a rotatable connecting structure. One ends of the two heat exchanger plates are connected through the rotatable connecting structure and arranged to be of an A-shaped structure, the middles of the two heat exchanger plates areconnected through the adjustable connecting piece, the length of the adjustable connecting piece is adjustable, and the angle between the two heat exchanger plates is changed through adjusting the length of the adjustable connecting piece. According to the A-type heat exchanger, through changing the included angle between the heat exchanger plates, the wind speed distribution of the windward sideof the heat exchanger tends to be uniform, the problem of non-uniform heat exchange of an existing heat exchanger caused by non-uniformity of airflow organization is effectively solved, and the overall heat exchange effect of a unit is improved, so that the operation efficiency of the unit is improved, and high economic value and practicability are achieved.

The invention discloses a directional accumulated-heat guiding rice cooker. The rice cooker comprises a heating plate, an inner container, an outer housing and an electric control device, wherein the heating plate comprises a panel shell, heating tubes, a heat accumulation layer and a thermal insulating layer; the heating tubes are clung to the inner surface of the panel shell; the heat accumulation layer and the thermal insulating layer are sequentially arranged under the heating tubes; the inner container comprises a container body made of a metal material and a conducting layer covering the container body; the thermal conductivity of the conducting layer is smaller than that of the container body; the outer housing is provided with an accommodating chamber with a top opening, the heating plate is positioned at the bottom of the accommodating chamber, the bottom of the inner container is in surface contact with the panel shell; a clearance is reserved between the side wall of the inner container and the outer housing so as to prevent the inner container from transmitting heat to the outside to form a thermal insulation mode; the electric control device is used for controlling the heating plate. The rice cooker can effectively improve the utilization ratio of heat, can transmit heat in all directions to solve the problem that rice is cooked incompletely, and has the characteristics of simple structure, low probability of thermal deformation of a plate body and long service life.

The invention discloses a microchannel propane direct expansion type solar heat pump water heater and belongs to the fields of solar heat pumps and energy heat supply. The microchannel propane directexpansion type solar heat pump water heater comprises a heat collector, a condenser, a heat storage water tank, an electronic expansion valve, a compressor and related connection pipes. The heat collector comprises a first manifold and multiple microchannel pipes. Every two adjacent microchannel pipes are connected through the first manifold. Each microchannel pipe is sleeved with a vacuum glass tube. Each microchannel pipe is a circular-arc-shaped flat pipe, wherein the circular-arc concave face faces sunlight. The inner surface side, right facing the convex face of the corresponding microchannel pipe, of each vacuum glass tube is coated with a reflective coating. Each reflective coating is used for collecting the unused sunlight leaking from gaps in the two sides of the corresponding microchannel pipe through the reflective coating in the corresponding vacuum glass tube and reflecting the sunlight to the convex face side of the corresponding microchannel pipe for secondary use. According to the microchannel propane direct expansion type solar heat pump water heater, the energy utilization can be optimally controlled by all the components, the energy loss is reduced in an all-around manner, and the microchannel propane direct expansion type solar heat pump water heater has the beneficial effects of being high in equipment utilization rate, remarkable in energy-saving and environmental-friendly effects and the like.

The invention discloses a phase change energy storage heat exchange device, and relates to the technical field of heat exchange equipment. The phase change energy storage heat exchange device comprises an electric heating box, the heat source output end of the electric heating box is connected with a water inlet pipe of a first energy storage device through a first heat storage control valve, thefirst energy storage device is provided with a water outlet pipe, and the water outlet pipe is connected with two heat source output pipelines. One heat source output pipeline is connected with the heat source input end of the electric heating box through a heat conduction oil pump and a second heat storage control valve, the other heat source output pipeline is connected with the heat source input end of a fan coil after passing through the heat conduction oil pump, a second heat release control valve and a second energy storage device, and the output end of the fan coil is connected with theheat source input end of the first energy storage device through a first heat release control valve. According to the phase change energy storage heat exchange device, phase change heat exchange energy storage can be achieved through off-peak electricity.

The invention relates to a heat exchanger and a gas water heater using the heat exchanger. The heat exchanger comprises a housing (1) and heat exchanging pipes (2) arranged in the housing (1) in a penetrating manner, wherein a housing inlet (11) and a housing outlet (12) are formed in the housing (1). The heat exchanger is characterized in that a plurality of casing pipes(3) which are arranged inparallel are also arranged in the housing (1); each casing pipe (3) is divided into at least two layers; each layer comprises one or more casing pipes(3); each casing pipe communicates with the corresponding casing pipe in the corresponding adjacent layer; the heat exchanging pipes (2) are sequentially arranged in the casing pipes (3) in the penetrating manner; a second heat exchanging medium enters the corresponding casing pipes in the adjacent layers after being discharged from the casing pipes; and the casing pipe inlet located at the bottommost layer communicates with the housing inlet (11), and the casing pipe outlet located at the topmost layer communicates with the housing outlet (12). Through the adoption of the heat exchanger disclosed by the invention, the stroke and remaining time of the second heat exchanging medium can be sufficiently enlarged and prolonged, so that the heat exchanging effect and heat exchanging efficiency are further enhanced; and the heat exchanger is compact in structure and convenient to process.

The invention discloses a directional accumulated-heat guiding rice cooker. The rice cooker comprises a heating plate, an inner container, an outer housing and an electric control device, wherein the heating plate comprises a panel shell, heating tubes, a heat accumulation layer and a thermal insulating layer; the heating tubes are clung to the inner surface of the panel shell; the heat accumulation layer and the thermal insulating layer are sequentially arranged under the heating tubes; the inner container comprises a container body made of a metal material and a conducting layer covering the container body; the thermal conductivity of the conducting layer is smaller than that of the container body; the outer housing is provided with an accommodating chamber with a top opening, the heating plate is positioned at the bottom of the accommodating chamber, the bottom of the inner container is in surface contact with the panel shell; a clearance is reserved between the side wall of the inner container and the outer housing so as to prevent the inner container from transmitting heat to the outside to form a thermal insulation mode; the electric control device is used for controlling the heating plate. The rice cooker can effectively improve the utilization ratio of heat, can transmit heat in all directions to solve the problem that rice is cooked incompletely, and has the characteristics of simple structure, low probability of thermal deformation of a plate body and long service life.

The invention relates to a freezing and thawing machine for freezing and thawing process treatment of biopharmaceutical material and belongs to the technical field of bioengineering pharmaceutical equipment. The freezing and thawing machine comprises partition boards, a guide rod, a hanger rod, a support frame and a driving mechanism; the partition boards are horizontally arranged in the freezingand thawing machine layer by layer; heat conducting media are arranged in the partition boards; the guide rod is arranged on the side face of the partition boards; the hanger rod for limiting is arranged between the partition boards corresponding to each other up and down; the driving mechanism is arranged above the partition board on the uppermost layer and enables the upper and lower surfaces ofthe partition boards moving relatively to be in full contact with biological material to realize the purpose of fast freezing and thawing; the partition boards ensure uniform and consistent temperature during the freezing and thawing process, so that the problem that the existing biopharmaceutical material is not synchronous or uniform in temperature treatment during the freezing and thawing process is avoided, the problems that the existing biopharmaceutical material is not recorded during the freezing and thawing process, the uniformity is poor during the freezing or thawing process and theproduction efficiency is low are solved, and the retention period of the finished product of the biopharmaceutical material is prolonged.

The invention provides a low-noise cross-flow type cooling tower for architecture heating and ventilation. The low-noise cross-flow type cooling tower for the architecture heating and ventilation comprises a tower shell, an air outlet, an air inlet, a top air outlet, a condensation shell, iron strips, net-shape frames, shaft drums, a main rotating shaft, a fan, a transmission motor, a heat exchanging cage plate, a partition plate, a connecting pipeline and a bottom cage; the air outlet and the air inlet are fixedly arranged on one side of the tower shell in a welding mode, and an integrated type filtering box is arranged at the middle part of the air inlet port; the integrated top air port is formed in the top of the tower shell; and an observation port is formed in one side of the tower shell, and the inner side of the observation port is arranged in an integrated type, penetrating glass is fixedly arranged in the observation port through sealing glue in an adhesive mode, an integrated water filling port is arranged on one side of the top of the observation port, corresponding transmission methods of a plurality of sets before are improved, the efficient working ability is providefor the cooling tower, the fan and agitating blades synchronously rotate through the cooperation of a main rotating shaft, and the cost of transmission components is greatly saved.

The invention relates to a cooling fin. The cooling fin comprises a fin body; a cavity containing a cooling medium is formed in the fin body, a cooling medium inlet is formed in one end of the fin body, and a cooling medium outlet is formed in the other end of the fin body. The invention further relates to a cooling fin type crystallizing tank with multiple cooling fins. The cooling fin type crystallizing tank comprises a tank body, an upper coil pipe and a lower coil pipe; the upper coil pipe is located on the upper portion inside the tank body and communicated with the cooling fins, and the lower coil pipe is located on the lower portion inside the tank body and communicated with the cooling fins; the upper coil pipe is connected with an upper in-out pipe penetrating out of the tank body, and the lower coil pipe is connected with a lower in-out pipe penetrating out of the tank body. The invention further relates to a cooling method of the cooling fin type crystallizing tank. The cooling fin and the cooling fin type crystallizing tank and the cooling method thereof have the advantages that the large-capacity area ratio is easy to configure, the temperature difference between the cooling medium and a crystallized material is decreased, and energy saving is relatively achieved and belong to the technical field of crystallizing tank cooling.

The invention discloses a device and a method for synchronously measuring the line displacement and straightness of a guide rail in situ. The integrated two-dimensional grating guide rail is to etch the two-dimensional grating on the upper surface of the linear guide rail, and the reading head is embedded in the slide block. The specific measurement method is as follows: when the slider moves on the guide rail, the reading head outputs two pairs of orthogonal sinusine and cosine signals at the same time, and after filtering and analog-to-digital conversion, it is transmitted to the host computer through the acquisition card, and the edge is counted by high-frequency pulses. Methods Calculate the displacement and straightness on the host computer; the linear displacement of the guide rail is obtained by the orthogonal signal generated by the grid line perpendicular to the x-axis, and the straightness of the guide rail is obtained by the orthogonal signal generated by the grid line perpendicular to the y-axis. The invention has the advantages of small installation volume of the guide rail pair, high positioning accuracy, multi-parameter synchronous on-site measurement, etc., and provides a new method for the displacement and straightness measurement of the guide rail.

The invention discloses a pipe flow balance device for a ground source heat pump, which comprises a control box, the inner wall of the control box is fixedly connected with a clamping block, one side of the clamping block clamps the pipeline body, and the bottom surface of the inner wall of the control box is fixedly connected with a The support frame is fixedly connected with a hydraulic cylinder at one end away from the control box, the right side of the hydraulic cylinder is movably connected with a telescopic rod, and the middle part of the surface of the telescopic rod is movably socketed with a connecting pipe. The pipeline flow balance device used for ground source heat pumps is equipped with a hydraulic cylinder, a telescopic rod, a hinge, a connecting block, an adjusting blade, a fixed plate and a rotating shaft, and the hydraulic cylinder drives the telescopic rod to expand and contract, so that the adjusting blade and the fixed plate rotate, thereby The regulating blades are used to adjust the flow rate inside the pipe body, so as to achieve the effect of regulating the pipe flow in the buried pipe, and achieve the goal of avoiding uneven heat transfer during use, so that it is more convenient to use.

The invention provides an air-conditioning heat exchange system comprising a high-efficiency evaporator, a high-efficiency condenser and a tubular heat exchanger, wherein high-efficiency condenser realizes integrated condensation and supercooling, the high-efficiency evaporator realizes integrated evaporation and overheating, and the tubular heat exchanger is employed to exchange heat with a gas coming out of the evaporator and a liquid from the condenser, and therefore, the heat of a refrigerating medium out of the condenser and the heat of a refrigerating medium out of the evaporator are utilized effectively and the efficiency of the system is improved; in the meantime, the overheating region and the evaporator region of the evaporator are communicated with each other through an overheating guide plate; the air-conditioning heat exchange system is simple in structure, and the sectional area of an overheating flow guide groove is approximately equal to the open area of overheating flow guide connectors at both ends so that the flow velocity of the refrigerating medium is stabilized at the guide plate, and as a result, the heat exchange efficiency is greatly improved.

The invention discloses a production device of a pipe body. The production device sequentially comprises a material mixing device, an extruding machine, a cooling device and a cutting machine from thefront to the back according to a technological process; the production device further comprises a pipe body surface detection device at the rear way of the cutting machine; and the cooling device comprises a cooling heat exchange pipeline and a water-cooling groove body assembly. The invention further discloses a method of producing a strengthening pipe body by using the production device of thepipe body. The production device and the method have the advantages that the strength is high, the cutting uniformity is good, and inferior-quality products are monitored on line.

The invention provides a heat exchanger and an air conditioner with the heat exchanger. The heat exchanger is arranged in an air conditioner shell, wherein the heat exchanger comprises a heat exchange part; the heat exchange part is inclined to the side wall of the shell; the heat exchange part is divided into m heat exchange areas in a flowing direction of air flow in the shell; m is greater than or equal to 3; the heat exchange part comprises a plurality of heat exchange pipe sections; the plurality of heat exchange pipe sections and the plurality of heat exchange areas are arranged in a one-to-one correspondence manner; a heat exchange pipeline of the nth heat exchange area is communicated with a heat exchange pipeline of the (m-n+1)th heat exchange area through a connection pipe section in a direction close to a supporting base plane of the air conditioner; n is greater than or equal to 1 and is smaller than or equal to m; and (m-n+1) is not equal to n. The heat exchanger solves the problem that heat exchange of all flow paths in the heat exchanger of the air conditioner in the prior art is not uniform.

The invention discloses a heat exchange thermal insulation pipeline structure, which consists of a waste heat collection and thermal insulation pipeline, first cooling and heat exchange pipelines, second cooling and heat exchange pipelines, a waste heat conveying and thermal insulation pipeline and a return material thermal insulation pipeline. The waste heat collection and thermal insulation pipeline is in series connection with the first cooling and heat exchange pipelines, the second cooling and heat exchange pipelines, and the waste heat conveying and thermal insulation pipeline respectively, the first cooling and heat exchange pipelines and the second cooling and heat exchange pipelines are connected in parallel and then are connected to the waste heat conveying and thermal insulationpipeline in parallel, and then the connected pipelines are connected to the return material thermal insulation pipeline in series through a centrifugal separation device. The heat exchange thermal insulation pipeline structure provided by the invention has the advantages of full use of factory production waste heat, gradual cooling of pipes with the waste heat, and improvement of pipe strength.

The invention provides a photo-thermal sensing method based on a wettability paper chip, verifies biological detection application of the method by taking miRNA as an example, and belongs to the technical field of biosensors. A super-hydrophilic micro-well is constructed on a hydrophobic paper base, then a capture probe is modified in the super-hydrophilic micro-well, and the miRNA photo-thermal sensor is prepared. According to the photo-thermal sensor for miRNA detection, when miRNA exists, the capture probe, the miRNA and the reporter probe are subjected to hybridization of a sandwich structure, the reporter probe further triggers the H1 probe and the H2 probe to be subjected to hybridization chain reaction, C-rich sequences at the tails of the H1 probe and the H2 probe can adsorb a large amount of Ag < + >, and Ag2S nanoparticles are generated under the action of Na2S; the concentration of a target object is converted into temperature to be output by utilizing the photo-thermal performance of the Ag2S nanoparticles, and the portable infrared thermal imager is used for quantification, so that the immediate quantitative detection of miRNA can be realized. The photo-thermal sensing method based on the wettability paper chip has the advantages of small sample size, high sensitivity, low cost, high flux and the like.

The invention discloses an intelligent wall-hanging stove, and relates to the related technical field of wall-hanging stoves. The intelligent wall-hanging stove comprises a shell and a water return valve, a heat exchange bin is arranged at the upper end of the interior of the shell, an automatic igniter is arranged at the bottom of the heat exchange bin, a gas valve is arranged in the middle of the bottom of the shell and connected with the automatic igniter through a gas pipe, a cold water valve is arranged on the right side of the gas valve and connected with a first four-way valve through awater pipe, meanwhile, the first four-way valve is arranged on the right side of the lower end in the shell, the top of the first four-way valve is connected with a water tank through a water pipe, the water tank is connected with a water pump through a water pipe, the water pump is arranged on the right side of the water tank, the water pump is connected with a first three-way valve through a water pipe, and the first three-way valve is arranged on the upper side of the water pump. The intelligent wall-hanging stove has the capacity of temporarily storing return water, hot water can be conveniently used for domestic water after being cooled, and the practicability is improved.

The invention discloses a microchannel propane direct expansion solar heat pump water heater, which belongs to the field of solar heat pump and energy heating. It includes heat collector, condenser, heat storage tank, electronic expansion valve, compressor and related connecting pipelines. The heat collector includes header one and several microchannel pipelines. The adjacent microchannel pipelines pass through the collector Once the tubes are connected, a vacuum glass tube is placed outside each microchannel pipeline. The microchannel pipeline is an arc-shaped flat tube, and its concave surface of the arc faces the sunlight, and the vacuum glass tube is facing the convex surface of the microchannel pipeline. Reflective paint is applied on the inner surface side of the microchannel pipeline, and the reflective paint is used to collect the unused sunlight leaked from the gaps on both sides of the microchannel pipeline by using the reflective paint in the vacuum glass tube and reflect it to the convex side of the microchannel pipeline for secondary use. In the present invention, each component optimizes and controls energy utilization, reduces energy loss in an all-round way, and has the advantages of high equipment utilization rate, remarkable energy saving and environmental protection effect, and the like.

The invention provides an evaporator assembly and a refrigerating device with the evaporator assembly. The evaporator assembly comprises a plurality of heat exchange tubes. The heat exchange tubes include the middle heat exchange tube in the middle of the overlook plane of the evaporator assembly and the first outer side heat exchange tube on the outer side of the overlook plane of the evaporator assembly. The first outer side heat exchange tube is located on the outer side of the middle heat exchange tube in the direction perpendicular to the direction of the heat exchange tubes. A liquid distribution tube assembly comprises a liquid inlet pipe and a plurality of liquid distribution tubes communicated with the liquid inlet tube. The multiple liquid distribution tubes include the first liquid distribution tube communicated with the middle heat exchange tube and the second liquid distribution tube communicated with the first outer side heat exchange tube, wherein the internal diameter of the first liquid distribution tube is larger than that of the second liquid distribution tube. According to the technical scheme, the problems that due to uneven heat exchange of different portions of an evaporator, the heat exchange efficiency and air conditioner refrigerating capacity are low, and oil consumption of a refrigerator car is increased in the prior art can be solved.

The invention relates to a freeze-thaw system for freezing, thawing or mixing process of biopharmaceutical materials, belonging to the technical field of bioengineering pharmaceutical equipment; including a freeze-thaw machine, a cooling and heating unit, an independent cabin, a partition, a driving mechanism and a swing mechanism The freeze-thaw machine is provided with an independent cabin; the cabin is provided with a corresponding partition, a driving mechanism and a swing mechanism; the partition is connected with the cooling and heating unit; A dividing plate is connected with the swing mechanism. While the two partitions moving relative to each other conveniently fix the biopharmaceutical materials, the entire partition ensures uniform temperature during freezing and thawing, and the mixing treatment of the biopharmaceutical materials by the rocking mechanism. It avoids the problem of asynchronous and uneven temperature treatment of biopharmaceutical materials in the process of freezing and thawing; solves the problems of no record, poor uniformity and low production efficiency in the process of freezing and thawing of biopharmaceutical materials.