5774 results about "Heat pipe" patented technology

A liquid cooling plate assembly is configured to be in thermal contact with a first heat source and a second heat source. The liquid cooling plate assembly includes a cold plate and a plurality of heat pipes. The cold plate includes a plate body and a plurality of fins. The plate body is configured to be in thermal contact with the first heat source and the second heat source, the plate body has a fluid chamber and an inner bottom surface, the inner bottom surface is located at a bottom of the fluid chamber, and the fins protrude from the inner bottom surface. The heat pipes are located in the fluid chamber and thermally coupled to the fins, and the heat pipes are arranged side by side and are in thermal contact with one another.

The invention discloses a control method for a cooling circulation system of a multi-core processor, and relates to the technical field of computer hardware heat dissipation, and the control method comprises the following steps: the multi-core processor is responsible for executing a calculation task; the sensor module monitors the temperature of each core; the cooling system control module is used for receiving data from the temperature sensor and the load monitoring module, calculating the cooling requirement of each core according to the data and commanding a cooling unit to adjust; the cooling unit is used for adjusting cooling equipment to reduce the temperature of the processor according to an instruction of the control unit; and the debugging interface is used for monitoring the state of the system and displaying the temperature, the load and the cooling resource distribution condition of each core. The method has the beneficial effects that the rotating speed of the fan, the liquid cooling flow and the working state of the heat pipe system can be accurately controlled by combining the accurate analysis of the load change and the temperature data, the heat dissipation efficiency of the processor is improved, and the energy waste is reduced.

A rechargeable battery includes a wound-type electrode assembly, a heat pipe, a can, and a cap plate. The heat pipe is disposed inside of the electrode assembly at a distance from a wound center of the electrode assembly, and the heat pipe surrounds the wound center. The can includes an internal space in which the electrode assembly and the heat pipe are positioned. The cap plate is coupled to an end of an opening of the can to close and seal the can, the cap plate is connected heat pipe, and the cap plate is configured to provide dissipation of heat from the heat pipe.

The utility model relates to a spraying type heat pipe structure and a heat management system.The spraying type heat pipe structure comprises an evaporation section, a condensation section, a liquid pump and a spraying pipe set, the evaporation section communicates with the condensation section, the liquid pump and the spraying pipe set are both arranged in the evaporation section, a power element and a liquid working medium are arranged in the evaporation section, and the liquid pump communicates with the spraying pipe set; and the liquid pump can spray the liquid working medium to the surface of the corresponding power element through the spraying pipe group, so that the liquid working medium can absorb heat, be gasified and enter the condensation section. According to the spraying type heat pipe structure and the heat management system provided by the invention, the problem that an existing cooling mode is difficult to meet the increasing heat dissipation requirement of a power element is solved.

A combination heat dissipation structure includes a vapor chamber and at least one heat pipe. The vapor chamber defines an airtight chamber filled with a working fluid and provided with first and second wick structures. The vapor chamber further includes at least one through hole formed on its upper wall and communicable with the airtight chamber, and at least one annular element provided in the airtight chamber corresponding to the through hole to contact with the first and second wick structures. The heat pipe has an open end inserted into the airtight chamber to contact with the first wick structure, such that the heat pipe is axially supported and located by the annular element. With these arrangements, a flow-back path between the vapor chamber and the heat pipe is largely shortened to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

The invention provides an intelligent detection method and system for the tensile property of a plastic cable tie. Gradient temperature rise control is executed through the carbon fiber heating tube array, microscopic deformation fluctuation characteristics are captured through the double-grating displacement sensor, and temperature field distribution is collected through the infrared thermal imager. Establishing dynamic correlation between deformation and a temperature field to generate a three-dimensional space-time atlas, identifying a migration path of a thermal aggregation area, recording a standard path, and calculating a thermal anomaly coefficient in combination with pressure data; analyzing temperature conduction hysteresis to generate a heat conduction parameter, and dynamically correcting a threshold value by cross-modal correlation with an abnormal coefficient; a structure degradation index is generated based on the migration path, mapping between the structure degradation index and a temperature field is established to generate a thermal damage compensation coefficient, an abnormal coefficient is calibrated accordingly, and grading early warning is triggered in combination with the path deviation degree. According to the technical scheme provided by the invention, multi-scale damage evaluation from thermodynamic associated data acquisition to molecular chain fracture inversion is realized, and the high-temperature tensile failure critical point is accurately pre-judged through a dynamic calibration early warning mechanism.

An apparatus includes a structure configured to receive thermal energy and to reject the thermal energy into an external environment. The structure includes a lid and a body. The structure also includes (i) multiple inline and interconnected thermomechanical regions and (ii) one or more oscillating heat pipes embedded in at least some of the thermomechanical regions. Different portions of at least one of the lid and the body form the thermomechanical regions. The one or more oscillating heat pipes are configured to transfer the thermal energy between different ones of the thermomechanical regions. At least one of the thermomechanical regions includes one or more shape-memory materials configured to cause a shape of the structure to change. Each of the one or more oscillating heat pipes includes at least one channel in the structure.

A three-dimensional heat transfer device includes a vapor chamber and a plurality of flatten heat pipes. The flatten heat pipes are disposed on the vapor chamber and arranged along an extension direction of a short side of the vapor chamber. Major axes of cross-sections of the flatten heat pipes are parallel to a long side of the vapor chamber.

The invention discloses a server liquid cooling cabinet group heat dissipation system with phase change energy storage, which comprises two linear array type server liquid cooling cabinet groups, two cooling capacity distribution units, two heat pipe air conditioner all-in-one machines, a multi-channel cold liquid distributor, a multi-channel hot liquid backflow device and the like, the all-in-one machine comprises a heat pipe natural cold source refrigerating loop and a compressor mechanical refrigerating loop, the two refrigerating loops independently or jointly provide an outdoor cold source, heat of all the liquid cooling cabinets is transmitted to the all-in-one machine in the cold capacity distribution unit, and therefore the heat is transmitted out of the machine room. A phase change energy storage flow channel is preferably arranged on the primary side of the intermediate heat exchanger in parallel, cold storage and buffering are achieved by switching a channel, a cold storage and cold release intelligent control strategy based on a lag temperature difference threshold value is constructed, a main cold source linkage and cold source switching smooth transition mechanism is achieved, the thermal stability, operation continuity and response capacity of the system are improved, and the system reliability is improved. The liquid cooling heat dissipation device is suitable for data center liquid cooling heat dissipation scenes with high heat density, high energy efficiency and high reliability requirements.

The invention relates to a preparation method of a polyurethane-based flexible phase-change material and a battery heat management device. Polyethylene glycol is used as a phase-change material, and adipic dihydrazide (ADH) and 4, 4 '-diphenyltetracarboxylic dianhydride (ADH) are integrated at a condensation end of a heat pipe; at least one of 4, 4 '-diaminobenzanilide (DABA) is used as a cross-linking agent, and at least one of HMDI or IPDI is used as a chain extender to prepare the polyurethane-based flexible phase change material with enthalpy value, flexible rigidity and appropriate phase change temperature. The material not only has excellent mechanical strength and thermal stability, but also has healing property, recoverability and shape memory function. The polyurethane-based flexible phase change material serves as an energy storage film and forms a sealing structure with the condensation end through mechanical pressing. When the temperature rises, the energy storage film B1 absorbs heat and expands, the contact area with the outside is increased, the heat dissipation power is improved, and the heat dissipation efficiency and the heat load management capacity are remarkably improved by maximizing the heat transfer area and utilizing the high latent heat characteristic.

The invention discloses a UPS battery temperature control structure and a temperature control method thereof, and the structure comprises a battery module, a thermoelectric coupling layer, and a heat insulation housing. The battery module consists of a plurality of battery units, and unit gaps are filled with a composite phase change material; the thermoelectric coupling layer comprises a semiconductor thermoelectric module array and a heat conduction assembly, and precise heat conduction is achieved through bidirectional temperature control of semiconductor thermoelectric modules and directional heat conduction of heat pipes. The heat insulation shell comprises an inner aerogel heat insulation layer and a radiation coating and isolates external extreme temperature interference. The temperature control method comprises the steps of monitoring the battery temperature, the environment temperature and the phase change state of the composite phase change material in real time, dynamically selecting a pure composite phase change material buffer mode and a semiconductor thermoelectric module active or mixed mode, and generating power and recharging energy by using the temperature difference of the cold end and the hot end of the semiconductor thermoelectric module. Through the synergistic effect of the composite phase change material, the semiconductor thermoelectric module and the shell, the temperature of the battery can be stabilized without external constant temperature equipment, and the temperature control energy consumption is low.

The invention discloses a geothermal hot spring pool thermovolt power generation and water temperature regulation and control combined system which comprises a hot spring pool and a thermovolt power generation device. A thermal insulation wall is arranged in the hot spring pool, the hot spring pool is divided into a hot spring power generation battery and a hot spring recuperating pool through the thermal insulation wall, and the thermovolt power generation device is arranged in the hot spring power generation battery; a geothermal water inlet is formed in the hot spring generating battery, and high-temperature geothermal water enters the hot spring generating battery through the geothermal water inlet; a temperature control valve system is arranged in the hot spring recuperation pool and used for controlling the temperature of hot water entering the hot spring recuperation pool. The pulsating heat pipe and the thermovolt power generation technology are creatively integrated, natural hot spring heat energy is fully utilized, temperature difference energy between hot spring water and cold water is utilized to the maximum extent before the temperature is reduced to the comfortable temperature of a human body, and the pulsating heat pipe is utilized to effectively increase the heat exchange area and heat extraction capacity; meanwhile, the thermovolt power generation chip is adopted to directly convert hot spring heat energy into electric energy, and the dual functions of hot spring water temperature adjustment and geothermal power generation utilization are achieved.

The invention discloses a co-extrusion shielding medium-voltage power cable, and relates to the technical field of cables, the outer side of an inner reinforcing rope is provided with a supporting flame-retardant assembly, the outer side of the inner reinforcing rope is sleeved with a reinforcing spiral, the outer side of the reinforcing spiral is sleeved with a heat conduction pipe, a flame-retardant bag is installed between adjacent supporting rods, and one side of a heat conduction film is bonded with a flame-retardant silica adhesive tape. According to the invention, the reinforced connecting rods embedded in the reinforced through holes can extrude the supporting rods to deform, so that bending is resisted, and excessive bending deformation is prevented; heat generated in the use process of the cable can be dispersed to other positions of the cable, local overheating of the cable is prevented, influences on other inner conductors are reduced due to various reasons such as cooling, fire extinguishing and keeping away of the inner conductors, it is guaranteed that the cable can work normally for a longer time, and the other normal inner conductors are protected.

The invention provides a copper-steel composite heat pipe and a preparation method thereof, and relates to the technical field of heat pipes, the copper-steel composite heat pipe comprises a steel-copper composite pipe, and the steel-copper composite pipe is composed of a copper inner pipe and a steel outer pipe. An internal copper structure is arranged in the steel-copper composite pipe; the internal copper structure is copper powder or a copper wire mesh. The copper powder is unilateral copper powder or bilateral copper powder or ring copper powder; the copper wire mesh is a copper mesh, or a copper mesh and a copper wire capillary, or a copper wire capillary. The steel outer pipe is made of steel 316L, and the copper inner pipe is made of copper C1020. The copper-steel combined material is used, the cost is saved, and it is guaranteed that materials are saved in the whole heat dissipation field. The double-layer combination of the copper inner pipe (C1020, high heat conduction) and the steel outer pipe (316L, corrosion resistance and high strength) is adopted, the efficient heat conduction of copper is utilized, and the environment erosion resistance and mechanical impact resistance of steel are utilized, so that the heat pipe is adaptive to complex working conditions (such as industrial high-temperature, humid or corrosion risk scenes), and the service life of the heat pipe is prolonged.

A cooling system assembly may include a heatsink unit and a water block unit. The heatsink unit is configured to enable a first cooling liquid to undergo a phase-change. The heatsink unit includes a heat pipe heatsink comprising a first thermal transfer surface and a second thermal transfer surface. The second thermal transfer surface is opposite the first thermal transfer surface. The first thermal transfer surface is configured to enable a heat to be transported from at least one packaged integrated circuit to the heat pipe heatsink. The water block unit is configured to enable a second cooling liquid to flow through the water block unit. The water block unit is thermally coupled to the second thermal transfer surface. The second thermal transfer surface is configured to enable the heat to be further transported from the heat pipe heatsink to the water block unit.

A combination thermal module includes a vapor chamber defining an airtight chamber filled with a working fluid and having at least one through hole formed thereon communicable with the airtight chamber; at least one annular wick structure provided in the airtight chamber corresponding to the through hole; and at least one heat pipe has an open end inserted into the airtight chamber to contact with a first wick structure on an inner lower surface of the vapor chamber and be axially supported on the annular wick structure. The annular wick structure includes communicable axial and radial passages, allowing vaporized working fluid to flow from the vapor chamber to the heat pipe quickly. With these arrangements, the thermal module has a shortened flow-back path between the vapor chamber and the heat pipe to avoid dry burning in the vapor chamber and upgrade the two-phase heat exchange efficiency of the vapor chamber.

The invention relates to the technical field of evaporation equipment, in particular to dilute sulfuric acid evaporation recovery equipment which comprises a base, a tank is mounted on the base, a liquid injection pipe is connected to the top of the tank, an upper circular plate and a lower circular plate are connected into the tank, connecting holes are formed in the upper circular plate and the lower circular plate at intervals, and a wavy pipe is connected between every two vertically-corresponding connecting holes. A heater located above the upper side circular plate is installed in the tank body, a spiral heat conduction pipe communicated with the liquid injection pipe is installed in the heater, a mounting plate located between the upper side circular plate and the heater is connected in the tank body, and a rotary liquid distributor communicated with the spiral heat conduction pipe is arranged on the mounting plate. By arranging a heater and a spiral heat conduction pipe, a dilute sulfuric acid solution can be preheated, so that the evaporation efficiency of dilute sulfuric acid is improved; rotary dynamic liquid distribution can be realized through rotation of the liquid distribution disc, so that the distribution uniformity of a liquid film is improved, and the evaporation recovery efficiency of dilute sulphuric acid can be further improved.

The invention discloses an efficient pulsating heat pipe air pre-heater gas stove, and relates to the technical field of gas stoves. The air pre-heater comprises an air pre-heater body, a pulsating heat pipe and an air supply pipeline, the pulsating heat pipe is embedded in an inner cavity of the air pre-heater body, and the bottom of the air pre-heater body communicates with the top of the air supply pipeline; the air pre-heater body comprises a heat insulation radiation cavity and an air pre-heating cavity. The heat transfer efficiency of the pulsating heat pipe is far higher than that of traditional metal heat conduction, heat of high-temperature flue gas can be rapidly absorbed, waste heat loss is reduced, the heat efficiency is improved, secondary air is heated through the air preheater, the temperature of the secondary air is increased, the combustion temperature is increased, gas combustion is more sufficient, emission of carbon monoxide and nitric oxide is reduced, and the energy-saving and environment-friendly effects are achieved. The pulsating heat pipe has the unique advantages of being small and exquisite in structure, flexible in arrangement and efficient in heat transfer, and the heat efficiency of the gas stove is effectively improved through the L-shaped pulsating heat pipe heat insulation air pre-heater structure.

The invention discloses a cable trench heat dissipation structure based on optimized arrangement of heat pipes and a design method thereof. The method comprises the following steps: acquiring the total heating value of each cable in the cable trench in the unit length in the extension direction of the cable trench, and determining the diameter of each heat pipe and the number of heat pipes needing to be configured in the unit length in the extension direction of the cable trench according to the total heating value and a heat transfer power upper limit model of a single heat pipe; constructing a multi-physics field coupling simulation model including a thermal field and a temperature field according to the determined diameters of the heat pipes, the number of the heat pipes needing to be configured in the unit length in the extension direction of the cable trench, the structural parameters of the cable trench and the laying environment parameters of the cable trench, and establishing a multi-physics field coupling simulation model based on the multi-physics field coupling simulation model. Optimizing arrangement parameters of the heat pipes in the cable trench; wherein the heat pipe arrangement parameters comprise the insertion depth of the heat pipes in the cable trench and the distance between the adjacent heat pipe sets, and one heat pipe set comprises at least one heat pipe. The current-carrying capacity of the cable in the cable trench can be improved.

A heat dissipation device includes a vapor chamber (1) and at least one heat pipe (2). The vapor chamber (1) includes a bottom plate (10) and a top plate (11) combined with each other to form a cavity (100); the cavity (100) contains a top plate capillary layer (11a) covering the top plate (11) which has at least one through hole (110). The heat pipe (2) includes a pipe body (20) with a closed end (200) and an open end (201) fixed in the through hole (110), and a pipe capillary layer (21) with a connecting portion (210). The top plate (11) includes at least one protrusion (111) corresponding to the through hole (110) and having a receiving portion (111a) recessed inside the top plate (11), and a capillary structure (11b) in the receiving portion (111a) and contacting with the connecting portion (210) and top plate capillary layer (11a).

A heat dissipation device is adapted for dissipating heat from a heat source, and includes a vaper chamber, a heat pipe set and a heat dissipation fin set. The vapor chamber is adapted for thermal coupling to the heat source. The heat pipe set is adapted for thermal coupling to the heat source, the heat from the heat source is synchronously conducted to the vapor chamber and the heat pipe set. The vapor chamber is thermally coupled to the heat dissipation fin set, and the heat pipe set penetrates through the heat dissipation fin set.

The invention discloses a casting ball production line metal mold preheating device for high-quality copper casting manufacturing, and relates to the field of casting manufacturing, the casting ball production line metal mold preheating device comprises a mold, a heat exchange mechanism, a heat pipe, a cold pipe and a cold and hot switching conveying mechanism; the device has the advantages of being reasonable and simple in structure, low in production cost and convenient to install, efficient circulating preheating of hot liquid is achieved through cooperative operation of the conveying pump, the heat pipe, the cold pipe and other components, the hot liquid fully exchanges heat with the mold in the heat exchange annular groove through the spiral flow guide pieces, and the preheating efficiency is greatly improved; the valve element is driven by the oil cylinder to move to achieve cold and hot passage switching, the function switching from preheating to cooling of the mold can be rapidly completed, the smoothness of the production process is guaranteed, and the production period is shortened; in the cooling process, cold liquid can flow back to the hot liquid cavity after absorbing heat of the mold, cyclic utilization of the cooling liquid is achieved, energy waste is effectively avoided, the production cost is reduced, and the resource utilization rate is increased.

The method for determining the heat pipe reactor rotary drum test period comprises the following steps: providing a jamming probability of a rotary drum driving mechanism of a heat pipe reactor and a common cause jamming probability of the rotary drum driving mechanism; establishing a fault tree model, and calculating the failure probability of the drum driving mechanism and the importance of the drum driving mechanism jamming basic event and the drum driving mechanism common cause jamming basic event; establishing a reference curve of the failure probability and the importance degree of the drum driving mechanism along with the change of the test period; and taking a test period corresponding to an intersection point of the two reference curves as a reference test period of the heat pipe reactor drum cycle test. According to the method, periodic test design of the drum driving mechanism can be guided in a quantitative calculation mode, and the reactor economy is optimized. The invention further provides a computing device.

The invention discloses a heat transfer calculation method for an interval capillary core pulsating heat pipe, which comprises the following steps of: constructing a relational expression of steam bomb temperature and pressure, and calculating the steam bomb pressure; constructing a liquid bomb energy equation, and calculating a liquid bomb temperature initial value; constructing an interval capillary core pulsating heat pipe liquid elastic momentum equation, and calculating liquid elastic displacement; constructing different pipe section liquid film length calculation formulas, and calculating different pipe section liquid film lengths; the heat transfer amount of liquid film evaporation and condensation is obtained, and the corresponding mass variation of the steam bomb is calculated; obtaining a relational expression of mass flow and pressure of the steam bomb, and calculating to obtain a new pressure value of the steam bomb; constructing a relational expression between the temperature and the pressure of the steam bomb, and obtaining a new value of the temperature of the steam bomb; constructing a liquid bomb energy equation, obtaining a new liquid bomb temperature value, and carrying out comparison iteration; obtaining sensible heat transferred in and out of the liquid bomb, and calculating the thermal resistance of the pulsating heat pipe; and outputting the calculation result to complete the calculation of the heat transfer model. The method provides guidance for design and development of the pulsating heat pipe covering the capillary cores at intervals.

The invention relates to the technical field of nuclear reactor safety, and particularly discloses a reactor waste heat export, recovery and comprehensive utilization system and method based on a heat pipe, and the system comprises a nuclear energy generation system, a secondary loop energy conversion system, a primary loop waste heat discharge system, a secondary loop waste heat discharge system, and a waste heat recovery and comprehensive utilization system. According to the waste heat recycling system, the heat pipe can be used for heat transfer and storage under the peak regulation operation condition, the nuclear heat use efficiency is remarkably improved, the requirements of various types of energy sources such as electricity and heat are met, and passive export of reactor core waste heat can be achieved through multi-natural-circulation coupling cooperative operation under the condition of a whole-field outage accident. By means of the efficient heat transfer characteristic and the modularization characteristic of the heat pipes, independent operation of the heat pipes can be achieved, the problem of single-point failure of the system can be avoided, meanwhile, separation of a reactor coolant and a cooling medium of a waste heat removal system can be achieved, the inherent safety of a nuclear reactor is remarkably improved, and the requirements of multi-purpose scenes are met; and the purpose of fully utilizing resources is achieved.

The utility model belongs to the technical field of heat dissipation and cooling, and particularly relates to an active balance type gravity assisted heat pipe, which comprises a condenser, an evaporator and a plurality of liquid storage tanks, the condenser is respectively connected with inlets of the plurality of liquid storage tanks through a first liquid downcomer, outlets of the plurality of liquid storage tanks are respectively connected with the evaporator through a second liquid downcomer, and the second liquid downcomer is connected with the evaporator. The evaporator is connected with the condenser through a gas ascending pipe, the gas ascending pipe is connected with the liquid storage tanks through bypass pipelines, and when the temperature difference T between the user heat dissipation end temperature T and the environment temperature T is smaller than or equal to the threshold value T, different liquid storage tanks are alternately used for liquid storage and liquid supply. The liquid storage tank for liquid supply is communicated with the evaporator and the gas ascending pipe, and the liquid storage tank for liquid storage is communicated with the condenser; according to the active balance type gravity assisted heat pipe, the gravity assisted heat pipe can be started smoothly when the indoor and outdoor temperature difference is small; and meanwhile, liquid supply and refrigeration working medium circulation can be promoted, and the heat exchange / heat dissipation effect is improved.

The invention discloses a heat pipe, a radiator and electronic equipment. The heat pipe comprises a pipe body, a first capillary structure and a second capillary structure. A containing cavity is formed in the pipe body and used for sealing and storing working fluid. The first capillary structure is attached to the inner pipe face of the pipe body. The second capillary structure is wrapped in the first capillary structure. According to the heat pipe, the first capillary structure with large capillary pressure wraps the second capillary structure with large permeability, so that the composite capillary structure with the high-speed backflow channel is formed in the heat pipe, and the advantages of different capillary structures are fully utilized; and the working fluid in the heat pipe quickly and fully participates in circulating heat transfer of liquid phase-gas phase change, so that the heat transfer performance of the heat pipe is improved.

A heat dissipation device includes a vapor chamber for contacting a heat source; at least one heat pipe having a first end and a second end connected to the vapor chamber; at least one partition disposed inside the heat pipe to partition the inside of the heat pipe into a first channel and a second channel isolated from each other; and a heat dissipation fin set disposed on the vapor chamber and partially covers the heat pipe. The vapor chamber is filled with a liquid working medium that absorbs the heat of the heat source and then gasifies into a gaseous working medium. The gaseous working medium moves into the first channel and the second channel to be condensed by the heat dissipation fin set, so the gaseous working medium is liquefied into the liquid working medium, and then the liquid working medium flows back into the vapor chamber.

The utility model provides a heating roller and rolling equipment, and the rolling equipment comprises a roller body, a heating device and a heating device, the multiple heating pieces extend in the length direction of the roller body, and the multiple heating pieces are evenly distributed in the roller body in the circumferential direction of the roller body; the heat pipe assembly is of an annular frame structure, the heat pipe assembly is arranged in the roller body, and the multiple heating pieces are located on the inner circumference of the heat pipe assembly. According to the heating roller, the heat pipe assembly is arranged in the roller body, and the heat pipe assembly has extremely high heat transfer efficiency, so that the heat pipe assembly can quickly transfer heat generated by the heating pieces on the peripheries of the heating pieces in the circumferential direction of the roller body, and the temperature difference of the circumferential surface of the roller body can be effectively reduced; the temperature uniformity of the surface of the roller body is improved; in addition, independent temperature control can be carried out on the multiple heating pieces, and the temperature uniformity of the surface of the roller body can be further guaranteed.

The invention provides a data center cascade refrigeration system control method and device, and the method comprises the steps: obtaining an outdoor wet bulb temperature to determine a first target temperature, obtaining an indoor return air temperature to determine a second target temperature, and calculating the temperature difference between the first target temperature and the second target temperature; the data center cascade refrigeration system is controlled to enter a first refrigeration mode, a second refrigeration mode or a third refrigeration mode according to preset conditions, and only the chilled water refrigeration system is started in the first refrigeration mode; in the second refrigeration mode, the chilled water refrigeration system and the evaporation cold and heat pipe refrigeration system are started at the same time; and in the third refrigeration mode, only the evaporation cold and heat pipe refrigeration system is started. In different modes, the system optimizes the refrigeration effect by adjusting the compressor frequency, the water pump frequency, the water supply valve opening, the fan frequency, the fluorine pump frequency, the expansion valve opening and other parameters, and the problems that in an existing refrigeration system in the prior art, the water side natural cooling time is short due to the fact that the temperature difference between the air side and the water side is inconsistent are solved. And more energy is consumed to meet the refrigeration requirement.