552 results about "Condenser (heat transfer)" patented technology

A refrigeration cycle is connected to a supercritical carbon dioxide (sCO2) power cycle by incorporating a CO2 condenser which is also the refrigeration cycle evaporator. The heat rejected by the carbon dioxide is absorbed by the refrigerant in the CO2 condenser. Work is done on the refrigerant to raise its temperature above the local ambient temperature. The heat absorbed from the power cycle and the work required to raise the refrigerant temperature is rejected to the ambient environment, which may be either air, earth, or water. This results in improved efficiencies in carbon dioxide power cycles without regard to the ambient temperature by forcing a transcritical phase change even when ambient temperatures are above the carbon dioxide critical point. A two-phase heat transfer on both sides of the CO2 condenser further improves efficiency of the sCO2 power cycle.

A refrigeration system includes a compressor, a condenser, a heat transfer component, and a refrigerant loop arranged to allow a flow of a refrigerant fluid. The compressor, the condenser, and the heat transfer component are connected in the refrigerant loop. The system further includes a bypass path extending between an output side of the compressor in the refrigerant loop and an input side of the heat transfer component in the refrigerant loop. A bypass valve is connected in the bypass path. A control circuit is in communication with the bypass valve. The control circuit is configured to open the bypass valve to allow the refrigerant fluid to pass to the heat transfer component thereby increasing the refrigerant fluid provided to the heat transfer component and artificially increasing a load on the refrigeration system. Other examples refrigeration system and examples methods are also disclosed.

The utility model relates to the technical field of air conditioners, particularly provides an air conditioner outdoor unit and an air conditioner, and aims to solve the problem that an existing air conditioner outdoor unit is poor in heat dissipation effect. In order to achieve the purpose, the air conditioner outdoor unit comprises a machine shell, the interior of the machine shell is provided with a partition plate, and the partition plate divides the internal space of the machine shell into a first cavity and a second cavity; the condenser is arranged in the first chamber; the electric control assembly is connected with the partition plate, and one end of the electric control assembly extends into the first cavity and is connected with a radiator; and the partition piece is arranged between the condenser and the radiator. The air flow passing through the radiator can be adjusted from a laminar flow state to a turbulent flow state, so that the convective heat transfer coefficient between the air flow and the radiator is increased, the heat exchange efficiency is enhanced, and stable operation of the electric control assembly is facilitated.

The invention discloses a microchannel condenser flow distribution global simulation method and system, and relates to the field of microchannel condenser flow distribution calculation. The method comprises the following steps: firstly, constructing a heat transfer and resistance model and forming a single-channel model by combining the size and structure of a parallel channel of the condenser and working medium flow heat exchange characteristics, and constructing a shunting and converging numerical model according to an inlet and outlet area structure of the condenser; secondly, numerical simulation is conducted on the division and convergence numerical model, and stable initial field distribution is obtained; then, determining the mass flow rate of each channel based on the shunting initial field, calculating the back pressure of the channel by taking the mass flow rate as the inlet boundary condition of a confluence model, calculating the inlet pressure of the channel through a single-channel model, and updating the outlet boundary of the shunting model; and finally, iterating the process until the channel mass flow error is smaller than a limit value, obtaining the distribution of the sub-confluence three-dimensional physical field and the one-dimensional flow heat exchange parameters and the heat exchange amount of the parallel channels, and checking whether the heat exchange amount meets the design requirements or not. The method gives consideration to calculation efficiency and precision, can provide support for structure optimization of the micro-channel condenser, and is suitable for micro-channel condenser design in the fields of refrigeration equipment, air conditioning systems and the like.

The invention relates to the technical field of absorption type heat exchange and heat supply technologies, in particular to an intelligent large-temperature-difference absorption type heat exchange unit and a heat exchange method.The intelligent large-temperature-difference absorption type heat exchange unit comprises an I-type unit, an II-type unit and a control system.The I-type unit and the II-type unit each comprise a heat pump host, a generator, a condenser, an evaporator, an absorber, a heat exchanger and heat exchange liquid; the heat exchange liquid conducts cascade heat exchange in the generator, the condenser, the evaporator, the absorber and the heat exchanger, the heat exchange liquid comprises a lithium bromide solution and refrigerant water, the control system comprises a controller and a standby plate heat exchange module, and the two heat pump main machines are both in communication connection with the controller. The multi-stage evaporation and multi-stage absorption process is adopted, cascade heat exchange can be achieved, and the temperature difference of inlets and outlets of the I-type unit and the II-type unit is increased, so that the outlet temperature of the units is reduced, irreversible heat transfer loss in the units is reduced, and the efficiency of the units is improved.

A thermomodulating heat pipe is provided including a heat pipe envelope having a capillary wick extending substantially continuously the full length of the heat pipe and a void space interior of the capillary wick. The heat pipe envelope has a nominal evaporator section, a nominal condenser section where the nominal condenser section includes an active condenser portion and an inactive condenser portion, and a reservoir section extending from the inactive condenser portion. At a nominal condition, a heat pipe fluid is provided with a liquid phase filling the capillary wick and a vapor phase filling the void space of the nominal evaporator section and the active condenser portion, a non-condensable gas filling the void space of at least the reservoir section and the inactive condenser portion. Depending on thermal conditions, both prograde and retrograde heat transfer are enabled.

The invention discloses a high-liquid-filling-rate loop thermosiphon with an evaporator of a gradient silk screen structure. The evaporator is of a tubular structure and comprises a hollow tube body. A plurality of layers of silk screens are arranged on the inner wall of the tube body, and meshes of the silk screens are increased layer by layer in the direction from the inner wall of the tube body to the center of the tube cavity; the pipe body and the screen mesh adjacent to the pipe body are tightly attached to each other and fixedly connected, and every two adjacent layers of screen meshes are tightly attached to each other and fixedly connected. The loop thermosiphon comprises the evaporator, a steam pipeline, a tubular condenser and a liquid pipeline, wherein the evaporator, the steam pipeline, the condenser and the liquid pipeline are sequentially connected end to end to form a closed loop. By using the gradient wire mesh evaporator and using the self-wetting fluid as the heat transfer working medium, the size of bubbles generated after phase change of the heat transfer working medium is reduced when the bubbles are separated from the evaporator, the bubble separation frequency is increased, the circulating power of the loop thermosiphon is enhanced, and the heat transfer performance of the loop thermosiphon is improved.

The present invention discloses an endoscope array scanning device for heat transfer tubes of a heat exchanger, wherein the sliding guide rail provides a guide for the multi-axis mechanical arm to move along both sides of the tube sheet, the mechanical arm lifting platform is arranged on the sliding guide rail, and is used to control the lifting height of the multi-axis mechanical arm, the lifting platform is fixedly mounted on the mechanical arm lifting platform, the multi-axis mechanical arm is arranged on the mechanical arm lifting platform, and is used to extend the endoscope probe into the tube mouth of the heat transfer tube, and the endoscope probe is arranged at the end of the multi-axis mechanical arm, and is used to collect and transmit the tube mouth image of the heat transfer tube; the present invention uses an automated endoscope array to perform intelligent visual inspection of the proximal tube mouth and tube sheet of the condenser, and quantitatively analyzes the defects detected in the tube mouth and tube sheet, which not only solves the problem of blind spots in the traditional eddy current inspection at the tube mouth, but also can perform quantitative analysis and visual management of the detected defects, reduce the burden on the inspection personnel, and improve the accuracy and efficiency of the inspection.

The invention relates to the technical field of thermal power generation, in particular to a direct air cooling condenser fouling thermal resistance estimation method combined with a scaling mechanism, and aims to realize stable and accurate real-time estimation of the fouling thermal resistance of a condenser. The method includes the steps that operation parameters of the direct air cooling unit are collected and preprocessed to form a continuous time sequence; calculating multiple groups of cleaning total heat transfer coefficients based on the cleaning period operation parameters, training a machine learning model based on the cleaning total heat transfer coefficients, and establishing a cleaning heat transfer coefficient reference model; calculating an actual total heat transfer coefficient based on the current operation parameters, inputting the reference model to obtain a corresponding cleaning coefficient, and calculating initial fouling thermal resistance according to the cleaning coefficient; and establishing a discrete linear recursion physical filtering model based on a dirt deposition-denudation mechanism, identifying model parameters on line by taking the initial dirt thermal resistance as an observed quantity, performing physical constraint filtering on the model parameters, and outputting a final dirt thermal resistance online estimated value.

The utility model discloses an R290 heat management system based on secondary loop integrated waste heat utilization, relates to the field of electric automobile heat management, and aims to solve the problems that a heat management system in the prior art is high in cost, large in heat transfer loss, incapable of coping with an extremely low temperature environment and insufficient in single-core refrigerating capacity. A six-way water valve and a seven-way water valve are combined with a three-way valve to form a heat management pipeline, the heat management pipeline exchanges heat with an R290 circulation pipeline, a water-cooling condenser and a chiller battery cooler can be fully operated, a system connecting pipeline and a fluid flow direction are flexible and controllable, the control precision is high, a cold air core body and a warm air core body can be connected in series during refrigeration by changing pipeline connection, and the refrigeration efficiency is improved. Therefore, double-core refrigeration is carried out, and the refrigeration capacity is high; by proportionally adjusting the cooling liquid flow of the two loops, accurate temperature control after liquid mixing is realized, temperature impact on the battery is avoided, and the heat exchange efficiency is higher.

The invention relates to a process for extracting alcohols from an initial mixture (1) comprising alcohols in aqueous phase, with:a distillative separation by an isopropanol-butanol distillation column (III) equipped at the top with a condenser (c3), intended for separating said mixture into a water-isopropanol azeotrope stream (6) at the top and into a water-butanol azeotrope stream (7) at the bottom,a distillative separation intended for separating the water-butanol azeotrope stream into water and butanol, by a hetero-azeotropic distillation system comprising at least one water-recovering water column (IV) and at least one butanol (9)-recovering butanol column (V) equipped with a reboiler (r5),such that a heat transfer is performed from the top water-isopropanol azeotrope stream (6) entering the condenser of the isopropanol-butanol distillation column (III), to the stream entering the reboiler of the butanol column (V).

The invention relates to the technical field of condenser self-cleaning, in particular to an air conditioner condenser self-cleaning structure based on bionic fins, which comprises a fixing frame, mounting plates are fixedly connected to two ends of the fixing frame, a plurality of groups of fins are connected to the outer side of the fixing frame, a copper pipe is arranged on one side of the plurality of groups of fins, and a sealing groove is fixedly connected to the outer side of the copper pipe. A reciprocating lead screw is rotationally arranged on one side of the sealing groove, a guide pipe is connected to the outer side of the reciprocating lead screw, and a connecting pipe A is connected to one end of the guide pipe. An air pressure pipe is arranged on one side of the multiple sets of fins. Therefore, dust particles attached to the surfaces of the fins are subjected to periodic external force, the adhesive force between dust and the fins is destroyed, the dust is made to fall off from the surfaces of the fins more easily, the surfaces of the fins are kept clean, meanwhile, convective heat exchange between air and the fins is enhanced, and the heat exchange efficiency in the heat dissipation process is improved.

The invention discloses a heat pipe radiator and an air conditioner outdoor unit, the heat pipe radiator comprises an evaporator and a condenser, and the evaporator is a U-shaped pipe; according to the parallel flow micro-channel heat exchanger of the condenser, a plurality of flat pipes arranged in parallel are arranged between an upper collecting pipe and a lower collecting pipe, and fins are arranged between the adjacent flat pipes; the U-shaped pipe and the condenser are integrally designed, pipeline connection between the evaporator and the condenser is simplified, the number of welding spots is greatly reduced, meanwhile, an efficient, compact and reliable heat pipe circulation loop is constructed, and when the heat pipe is applied to heat dissipation of a controller of an air conditioner outdoor unit, the heat pipe has the remarkable advantages in the aspects of heat transfer efficiency, structural layout, reliability, environmental adaptability and the like.

The invention discloses a polyolefin elastomer solution devolatilization system and a polyolefin elastomer solution devolatilization method. The system comprises a horizontal double-shaft kneading devolatilization device and a double-screw extrusion devolatilization machine, a high-temperature atomizer is arranged at a feeding hole of the horizontal double-shaft kneading devolatilization device; the high-temperature atomizer comprises an atomizing nozzle, a gas heater and an air blower; a devolatilization opening is formed above the horizontal double-shaft kneading devolatilization device and is sequentially connected with a condenser and a vacuum pump; a discharge hole of the devolatilization device is connected with a discharge screw rod; a feeding port of the double-screw extrusion devolatilization machine is connected with a discharging screw, a devolatilization port is formed in the upper portion of the double-screw extrusion devolatilization machine and sequentially connected with a condenser and a vacuum pump, and a devolatilized product outlet is formed in the tail of the devolatilization machine. According to the invention, the horizontal double-shaft kneading devolatilization device and the double-screw extrusion devolatilization machine are matched with each other, and the high-temperature atomizer is assisted, so that a large-area heat transfer effect is realized, an efficient devolatilization effect is further realized, and a polymer product with lower residual volatile component content is obtained.

The invention discloses a super-hydrophobic fin-shaped condensation pipe based on porous memory alloy, and belongs to the field of condensation and heat and mass transfer enhancement. Aiming at the problems of large liquid film thermal resistance, low efficiency and poor working condition adaptability during condensation heat transfer outside a traditional condensation pipe, the invention comprises a fin-shaped condensation pipe, a porous memory alloy and a super-hydrophobic preparation method. The fin-shaped condensation pipe is made of high-heat-conduction metal, preferably red copper or aluminum, and an array type fin-shaped structure is formed through laser processing. The Ni-Ti porous memory alloy is attached to the outer side of the fin shape through SLM, and spontaneous separation of liquid drops is achieved; the super-hydrophobic characteristic provides high-density nucleation points, and rapid generation of micro-nano liquid drops is promoted. Through collaborative innovation of the super-hydrophobic fin-shaped structure, the porous memory alloy and the super-hydrophobic characteristic, the liquid drop separation critical radius can be effectively reduced, the surface renewal rate is increased, efficient and stable condensation heat transfer efficiency is achieved, and the super-hydrophobic fin-shaped structure is suitable for different condensation working conditions.

The invention belongs to the technical field of 3C product manufacturing, and discloses a phase change heat transfer middle frame and a manufacturing method thereof.The phase change heat transfer middle frame comprises a middle frame body, and a plurality of through holes are formed in the surface of the middle frame body; the phase change heat transfer part is installed on the inner wall of the middle frame, and the phase change heat transfer part is used for conducting uniform heat dissipation on the interior of the middle frame; the phase change heat transfer component comprises two adaptive frames and a phase change heat transfer mechanism located in the centers of the two adaptive frames. The phase change heat transfer mechanism comprises a pipeline, and a mounting assembly, an evaporator, a liquid storage device and a condenser which are respectively mounted on the pipeline, through the cooperation of the middle frame, the pipeline, a capillary structure and other structures, rapid and uniform heat dissipation is realized, and the problems that an existing device is difficult to conduct heat to a screen through a hinge, and the heat dissipation effect is poor are solved. Although the heating element has basic heat conduction capability, the heating element is limited by the characteristic of poor temperature uniformity, and heat is easy to accumulate at the corresponding position of the heating element.

Provided are an air separation device and an air separation method that have high argon yield without increasing the heat transfer area of a deoxidized argon condenser that generates reflux liquid in an argon tower generating deoxidized argon to be used as a raw material in a high-purity argon tower. Specifically provided is an air separation device comprising: an argon tower (700) that distills argon-containing oxygen drawn from a low-pressure tower (600) and generates deoxidized argon from which oxygen has been removed; a deoxidized argon condenser (400) that generates reflux liquid in the argon tower (700); a high-purity argon tower (800) that distills deoxidized argon and extracts pure argon from which nitrogen has been removed; a high-purity argon condenser (900) that generates reflux liquid for the top portion of the high-purity argon tower (800); a high-purity argon evaporator (910) that generates ascending gas for the bottom portion of the high-purity argon tower (800); a pipeline (622) that sends liquid nitrogen to the high-purity argon condenser (900) as a cooling medium; and a pipeline (42) that sends liquid derived from a high-pressure tower (500) to the high-purity argon evaporator (910) as a heating medium.

The invention relates to the technical field of electric vehicle thermal management, and discloses an electric vehicle thermal management system and a control method thereof. The system comprises a compressor, multiple sets of refrigerant loops and cooling liquid loops, a three-way proportional valve, an electronic expansion valve and a controller, the refrigerant loops achieve heat transfer through the compressor and a water-cooled condenser, and the cooling liquid loops distribute heat to a passenger compartment and a battery through an electronic water pump and the three-way proportional valve; according to the control method, a first, second or third initialization mode is selected based on the outside environment temperature, and multi-loop cooperative control is achieved by adjusting the opening degree of the valve, the duty ratio of the water pump and the rotating speed of the compressor. The R290 refrigerant is adopted to broaden the operating temperature range, electric drive waste heat recovery and passenger compartment waste heat utilization are combined, the low-temperature heating energy efficiency ratio is remarkably increased, the problems that an existing heat pump system is difficult to start at the extremely low temperature, heating is delayed, and energy consumption is too high are solved, and rapid temperature rising and accurate temperature control of the passenger compartment and a battery in the environment of-30 DEG C or above are achieved.

The invention discloses an evaporator and cold drink equipment, the evaporator comprises an evaporation cylinder, an air return pipe and a communicating pipe, the air return pipe and the communicating pipe are communicated with the evaporation cylinder, an evaporation cavity is arranged in the evaporation cylinder, the air return pipe is communicated with an external compressor, an air return section of the air return pipe is connected with the evaporation cylinder and is communicated with the evaporation cavity, and the communicating pipe is communicated with the communicating pipe. The communicating pipe is communicated with an external condenser or a throttling component, a spraying section of the communicating pipe is connected with the air return section and communicated with the evaporation cavity, an oil return part is arranged in the evaporation barrel, the outlet end of the oil return part can be communicated with the air return section, the inlet end of the oil return part is close to the inner side wall of the evaporation barrel, and the oil return part is communicated with the oil return part. And the oil return piece can rotate along with the evaporation cylinder. The cold drink equipment comprises the evaporator. By adopting the oil return device, oil can be effectively returned, and the oil return efficiency is improved, so that the normal operation of the compressor and the heat transfer efficiency of the evaporator are ensured, and the external space of the evaporator is not occupied.

The invention relates to a liquid cooling heat dissipation system based on double-circulation dynamic switching and a control method, and belongs to the technical field of data center heat dissipation. The liquid cooling heat dissipation system comprises a server cabinet, an indoor CDU and an outdoor heat dissipation unit; the outdoor composite heat dissipation unit comprises a multi-channel condenser; the multi-channel condenser is provided with a plurality of independent flow channels, and the independent flow channels are opened or closed according to different temperatures. According to the invention, through innovative pipeline architecture and thermal path design, collaborative optimization of heat dissipation efficiency and space utilization rate of the high-density data cabinet is realized. The system adopts a graded tandem type heat transfer mode, chip-level high-heat-flux heat dissipation and cabinet-level low-grade waste heat recovery are integrated into the same circulating system, meanwhile, the heat dissipation requirements of different seasons and external temperatures are met through dynamic flow path switching of an outdoor module, the energy efficiency is remarkably improved, and equipment redundancy is reduced.

The invention relates to the technical field of heat exchangers, and discloses a shell-and-tube condenser capable of automatically removing a liquid film, which comprises a shell, one end of the shell is provided with a cold water inlet, the other end of the shell is provided with a cold water outlet, the upper end of the shell is provided with an air inlet, and the lower end of the shell is connected with a liquid outlet pipe; a plurality of air uniformizing holes are formed in the air uniformizing cover, the air uniformizing cover divides an inner cavity of the shell into a first cavity body and a second cavity body, a second finned tube is arranged in the first cavity body, a first finned tube is arranged in the second cavity body, and liquid guide fins are arranged on the outer wall of the first finned tube. The finned tube I is arranged, and the liquid guide fins are additionally arranged on the finned tube I, so that the continuity of a liquid film is actively destroyed, the liquid film does not accumulate and grow outside the tube, but accumulates in the liquid guide fins to drop in a liquid drop form, and the problem of thermal resistance caused by liquid film coverage is effectively solved; and the heat transfer efficiency of the whole equipment is obviously improved.

A thermal management system for an aircraft includes a thermal bus including one or more first heat sources; a heat sink; a vapour compression system including a compressor, a condenser, a receiver, a first side of a recuperator, an expansion valve, an evaporator, a second side of the recuperator, and the compressor; and one or more second heat sources. A heat transfer fluid transfers waste heat energy generated by the first heat sources to the heat sink. A second flow of waste heat energy from the second heat source(s) is transferred to a refrigerant. A third flow of heat energy in the refrigerant is transferred to the heat transfer fluid. The compressor includes a supplementary refrigerant reservoir, and the volume of refrigerant in the vapour compression system is increased during operation when a temperature of the heat transfer fluid is at or below a temperature of the second heat source(s).

Disclosed in the present invention is a zero carbon emission offshore liquefied natural gas production system device. The zero carbon emission offshore liquefied natural gas production system device comprises an offshore liquefied natural gas separation device, a water-electrolytic hydrogen production device, and a CO2 methanation device, wherein the offshore liquefied natural gas separation device comprises an offshore liquefied natural gas storage tank, a first raw material delivery pump, a first condenser, a first cryogenic rectification apparatus, a second raw material delivery pump, a second condenser, a second cryogenic rectification apparatus, a natural gas condensation and drying apparatus, and a natural gas pressurization and liquefaction apparatus; the water-electrolytic hydrogen production device comprises a water storage tank, a water delivery pump, a clean energy power generation apparatus, a water-electrolytic hydrogen production apparatus, and a hydrogen delivery apparatus; and the CO2 methanation device comprises a gas mixer, a heat exchanger, a multistage heat-transfer high-gravity reactor, and a third condenser. Using the multistage heat-transfer high-gravity reactor, the present invention can, on the one hand, solve the problem of heat transfer of the high-gravity device during the highly exothermic reaction, and on the other hand, can effectively reduce carbon deposition on the surface of the catalyst.

The invention discloses a spraying type ice maker which comprises a top cover, a shell and a base plate, a compressor and a condenser which are located on one side of the base plate and arranged side by side are installed on the lower side of the shell, and a fan which directly blows air to the outer side of the shell is installed beside the condenser; a cold water storage tank with a 7-shaped hopper-shaped cavity structure is mounted in the shell beside the compressor and the condenser, and the top end of the cold water storage tank is sealed by a top cover; a spiral automatic ice discharging device used for automatically supplying ice blocks outwards is obliquely arranged in the middle of the cold water storage box. A spraying ice-making device located on the upper portion of the rear side in the cold water storage box is arranged on the upper side of the spiral automatic ice discharging device. A spraying water pump for pumping ice water stored at the bottom of the cold water storage tank to the spraying ice-making device through a pipeline to perform spraying ice-making is also mounted on the outer wall of the storage cavity at the lower part of the cold water storage tank; the whole machine is small in size, capable of automatically controlling ice discharging, high in ice making efficiency and suitable for home use, the evaporator is integrally formed through the die-casting technology, and the heat transfer efficiency of the evaporator and the ice block quality are improved.

The invention relates to a converter station waste heat recovery management optimization model, and belongs to the field of converter station waste heat recovery. The method mainly comprises the steps of thermal resistance analysis, scaling process control, turbulence enhanced heat transfer, online monitoring and dynamic adjustment, cleaning period optimization and the like. The waste heat recovery performance is optimized through the measures of analyzing the total heat transfer resistance of the condenser, restraining dirt deposition, arranging a turbulence promoting device to enhance the heat transfer efficiency and the like. And meanwhile, real-time monitoring and dynamic optimization of operation conditions are carried out by virtue of a computational fluid mechanics simulation and dirt growth coupling model. And finally, the scaling period is prolonged through a turbulence strengthening device and a surface modification technology, and the waste heat recovery efficiency of the converter station is improved. According to the method, the dirt deposition rate can be effectively reduced, the heat energy recovery efficiency and the equipment operation safety are improved, and efficient use of energy is achieved.

The utility model provides an efficient heat dissipation bridge which is used for cable storage and comprises a heat dissipation device and a fixing device. The heat dissipation device is composed of a bridge frame, a condenser and a storage net. The condensation end of the bridge is provided with the groove, the condenser is arranged in the groove, heat transfer is optimized through the groove, and the heat dissipation effect is enhanced. The first face of the condenser makes contact with the groove, a storage net is installed on the second face of the condenser, cable fixing and protection are provided, meanwhile, heat dissipation is assisted, the fixing device comprises a fixing piece and a temperature sensor, the sensor monitors the temperature in real time, one end of the sensor is arranged at the fixing end, and the other end of the sensor is connected with the fixing piece. According to the overall design, the condenser and the storage net are used in cooperation, efficient heat dissipation of the heat dissipation system and the stability of the cable are ensured, overheating is prevented, and the long-term reliability of the system is improved.

The utility model discloses an anti-overflow expansion tank and an anti-oil-overflow refrigeration temperature control system, the anti-overflow expansion tank comprises an expansion tank main body, the expansion tank main body is provided with a liquid adding port, the expansion tank is provided with a first interface and a second interface, the anti-overflow expansion tank further comprises an exhaust valve and a one-way valve, the first interface is connected with an inlet of the exhaust valve, and an outlet of the exhaust valve forms an exhaust port of the expansion tank; an outlet of the one-way valve forms a main outlet of the expansion groove; comprising the anti-overflow expansion tank and further comprises a medium outlet and a medium inlet, and the medium inlet is sequentially connected with a cold storage tank, a circulating pump, a plate heat exchanger, a compressor, an oil separator, a condenser, a drying filter and an expansion valve through pipelines, then enters the plate heat exchanger and is connected to the medium outlet; by modifying a common expansion tank, heat-conducting oil overflowing from the expansion tank due to backward flowing can continuously stay in the expansion tank, so that the working environment is not polluted, the waste of the heat-conducting oil is avoided, and waste oil is avoided.

The invention relates to an air dehumidification system (200) within a closed culture structure comprising a thermodynamic circuit, said thermodynamic circuit comprising: an evaporator (102), for cooling and dehumidifying the air (114) in said culture structure by heat exchange with a heat transfer fluid of the thermodynamic circuit, a first condenser (104) for heating the air (114) at the outlet of the evaporator (102) by heat exchange with said heat transfer fluid, an expansion valve (106), between said first condenser and said evaporator for lowering the pressure of the heat transfer fluid from said first condenser (104) and supplying it to said evaporator (102), and a compressor (108), between said evaporator (102) and said first condenser (104) for increasing the pressure of the heat transfer fluid from said evaporator;in which the thermodynamic system circuit further comprises a second condenser (110), supplying said first condenser (104) with heat transfer fluid, to condense said heat transfer fluid at least partially by heat exchange with a first flow. It also relates to a closed culture structure comprising an air dehumidification system. Figure: Fig. 2;

A heat exchanger module includes a skin condenser and a skin evaporator. The skin condenser includes an inner condenser plate, an outer condenser plate coupled to the inner condenser plate and a condenser tube channel formed on one of the inner condenser plate and / or the outer condenser plate. The evaporator includes an inner evaporator plate, an outer evaporator plate coupled to the inner evaporator plate, and an evaporator tube channel formed on one of the inner evaporator plate and / or the outer evaporator plate. The heat exchanger also includes an insulation layer extending between the inner condenser plate and the inner evaporator plate. Each of the plates that form the skin condenser and / or evaporator can be formed from different materials and / or have different material thicknesses to reduce heat transfer through the insulation layer from the condenser to the evaporator while also promoting heat transfer through natural convection with surrounding air.

A thermal management system for electric construction machinery, the thermal management system comprising a battery pack (1), a first liquid storage tank (2), a first liquid pump (3), a plurality of first air-conditioning units (4) arranged in parallel, a heat dissipation group (5) and a first controller (6), wherein the battery pack provides a driving force; the first liquid storage tank stores a circulating medium; the first liquid pump is in communication with the first liquid storage tank; the first liquid pump is connected to the battery pack to form a first circulating loop (100); the first liquid pump drives the circulating medium to flow through the battery pack, such that the circulating medium exchanges heat with the battery pack; each first air-conditioning unit comprises a compressor (41), a condenser (42), a first throttling device (43) and a first evaporator (44), and the first air-conditioning units reduce the temperature of the circulating medium in the first circulating loop; the heat dissipation group dissipates heat from the condensers in the first air-conditioning units and / or reduces the temperature of the circulating medium flowing through the battery pack; and the first controller controls, on the basis of the temperature of the battery pack, the plurality of first air-conditioning units and the heat dissipation group to start and stop. The thermal management system effectively reduces the number of heat dissipation groups, thereby facilitating an improvement in the heat transfer efficiency of the system, and improving the energy consumption of a whole vehicle. In addition, further disclosed are a control method and electric construction machinery.