629 results about "Cooling capacity" patented technology

The invention discloses a public building cold load short-time prediction method fusing physical information, and the method comprises the steps: collecting and preprocessing the historical cooling capacity, indoor environment, outdoor weather and equipment operation state data of a public building at a fixed time interval, and obtaining multi-dimensional input features; respectively establishing a workday sub-model and a holiday sub-model according to workday and holiday scene division; the workday sub-model and the holiday sub-model jointly form a cold load prediction model, the workday sub-model adopts a long short-term memory (LSTM) network, and the holiday sub-model adopts a light gradient elevator (Light GBM); a physical constraint loss function based on building energy balance and heat conduction residual error is introduced in the training process, and the physical constraint loss is fused into a total loss function according to a weighting coefficient so as to constrain that the output of each sub-model accords with the law of energy conservation and thermal inertia; monitoring the prediction error MAPE in real time and performing online calibration; and outputting a short-time cold load prediction result.

The invention discloses a linkage control system and method for cold energy storage and release in an energy storage low-temperature interval, belongs to the technical field of energy storage system temperature control, and aims to solve the problems that traditional energy storage cold energy regulation is lagged, cold energy waste is serious, and dynamic changes of working conditions are difficult to adapt. According to the system and method, cold release judgment is triggered based on the environment temperature and the temperature of an energy storage module, a cold release interval is defined by predicting the environment temperature and the temperature of the energy storage module in a fitting mode, a temperature prediction curve is dynamically corrected in combination with real-time working conditions, cold release subintervals are divided, and a cold release control instruction is generated; and meanwhile, the temperature of the energy storage module is monitored in real time to correct the cooling capacity release control instruction, and a cooling capacity recovery instruction is generated by monitoring the temperature of the cooling liquid. Accurate steady-state control over the temperature of the energy storage module and efficient circulation of the cooling capacity are achieved, and the operation economical efficiency and safety of the energy storage system are remarkably improved.

The utility model relates to the technical field of air conditioning, in particular to an air supply structure, an air supply system and a koji room. The air supply structure comprises an air supply branch pipe, a first air valve assembly and a second air valve assembly. One end of the air supply branch pipe is an air inlet end, and an air supply section with a plurality of air supply holes in the pipe wall is formed on the air supply branch pipe; the first air valve assembly comprises a first driving mechanism and a first air valve arranged in the air supply section, and the first driving mechanism is configured to drive the first air valve to move in the air supply section so as to be close to or away from the air inlet end; the second air valve assembly comprises a second air valve arranged in the air supply section, and the second air valve is located between the first air valve and the air inlet end. According to the method, targeted air supply can be conducted on the local heating area in the space, unnecessary whole-area air supply is reduced, cooling capacity is concentrated in the hot spot area, the method can adapt to constantly-changing hot spot positions, and the air supply area and the air supply amount can be adjusted.

The invention discloses a phase change latent heat slow-release single-phase immersion liquid cooling intelligent temperature control adjusting method and system, and relates to the technical field of electronic equipment heat management. The phase change latent heat slow-release single-phase immersion liquid cooling intelligent temperature control adjusting method comprises the following steps: S1, collecting phase change liquid cooling temperature control data, and preprocessing the phase change liquid cooling temperature control data; s2, evaluating the running state of the server, assigning a thermal response level identifier based on an evaluation result, and constructing a thermal response state data set; s3, evaluating the cooling slow release capability in a temperature control early warning state and a thermal shock state, and generating and executing a self-adaptive cooling adjustment strategy in a grading manner; and S4, after the cooling regulation strategy is executed, the response efficiency of the cooling strategy is evaluated, a cooling strategy optimization instruction is generated, and strategy closed-loop regulation is realized on the basis of monitoring the change trend of an evaluation result in a continuous regulation period. The problem that the chip temperature of an existing liquid cooling system fluctuates abnormally due to cooling capacity response lag in an instantaneous high-load scene is solved.

The invention discloses an axle staged cooling system, an axle staged cooling assembly and an engineering vehicle. The axle staged cooling system comprises an engine first-stage cooling system, an engine second-stage cooling system, an axle first-stage cooling system and an axle second-stage cooling system. Each stage of cooling system controls cooling water and oil path trend through a thermolator in each loop, controls axle cooling oil and engine cooling water to exchange heat, and meets different cooling requirements of an axle. The temperature sensor in each loop outputs water and oil temperature signals to a motor of the cooling fan, so that the rotating speed of the fan is increased to different degrees along with the temperature rise of each cooling system, and different cooling powers are matched. According to the grading system, the engine and the axles can work at the proper temperature at the same time, the two heat exchangers cool cooling oil of the front axle, cooling oil of the middle axle and cooling oil of the rear axle respectively, the cooling capacity of the front axle is improved, the braking effectiveness of the front axle is guaranteed, and rollover caused by serious backward movement of the gravity center of a vehicle during emergency braking is prevented.

The invention provides a water-air composite cooling device and a cooling method for a lithium battery pack, relates to the technical field of lithium battery thermal management, and solves the technical problems of low air cooling thermal conductivity, insufficient cooling capacity, high water cooling cost, complex structure and difficulty in adapting to different working conditions caused by limitation of a single cooling mode of an existing lithium battery. According to the technical scheme, an air cooling unit achieves basic heat dissipation through an air duct and a draught fan; the water cooling unit achieves efficient heat dissipation through a water channel, a water pump and a temperature control assembly, and the temperature of cooling liquid can be adjusted. The temperature monitoring control unit adopts a PT100 thermal resistor to collect temperature signals, and regulates and controls operation parameters of the air cooling unit and the water cooling unit through an intelligent switch; the intelligent optimization unit constructs a flow field and temperature field model based on computational fluid mechanics, optimizes structural parameters and the flow velocity of a cooling medium in combination with a neural network algorithm, and realizes self-adaptive adjustment of a cooling strategy; the heat dissipation efficiency and stability are improved, and the service life of the battery is prolonged.

The invention discloses a pearl wool foaming stirrer, and relates to the technical field of foaming stirring equipment. A plurality of cooling cavities are formed between an outer cylinder and an inner cylinder of a stirring arm assembly, so that during stirring, a wedge block of a driving assembly pushes a second spherical block of a stirring arm to drive a piston assembly to do reciprocating motion, and circulating flow of cooling liquid among the cooling cavities, the inner cylinder and a heat dissipation unit is achieved; therefore, heat generated by friction between the outer wall of the stirring arm and the pearl wool foaming material is taken away in time, the problems of foaming agent decomposition and polyethylene particle structure breakage caused by local overheating are solved fundamentally, and the original performance of the material is guaranteed. Each cooling cavity is internally provided with an independent plugging plate, the plugging or opening state of the plugging plates to the cooling cavities can be controlled by rotating the screws, namely the more the plugged cooling cavities are, the less the cooling liquid participating in circulation is, the weaker the cooling capacity is, otherwise, the stronger the cooling capacity is, and the cooling strength can be flexibly adjusted according to the stirring working condition through the design.

The invention provides a liquid cooling system cooling capacity distribution unit control method, device and unit and a liquid cooling system. The method comprises the steps that current hydraulic parameters of cooling liquid in a secondary side liquid supply and return pipeline are obtained; if the current hydraulic parameter is smaller than a preset hydraulic threshold value and the absolute difference value between the current hydraulic parameter and the preset hydraulic threshold value is larger than a first preset difference value, the frequency of a circulating pump and / or the opening degree of a bypass valve are / is adjusted according to the current hydraulic parameter and the preset hydraulic threshold value so as to increase the flow of cooling liquid in a secondary side liquid supply and return pipeline; and if the current hydraulic parameter is larger than a preset hydraulic threshold value and the absolute difference value is larger than a first preset difference value, the frequency of a circulating pump and / or the opening degree of a bypass valve are / is adjusted according to the current hydraulic parameter and the preset hydraulic threshold value so as to reduce the flow of the cooling liquid in the secondary side liquid supply and return pipeline. Heat dissipation control can be carried out timely and accurately, the heat dissipation performance of the liquid cooling system is improved, the heat dissipation requirement of the server is met, and normal operation of the server is guaranteed.

The invention discloses efficient cooling laser cutting equipment for water cooling plate machining, and relates to the technical field of metal cutting equipment. The main cooling module comprises a connecting ring and a first cooling pipe body part, and a first inserting gap formed by winding a first cooling pipe in an S shape is formed in the first cooling pipe body part; the auxiliary cooling module comprises a second cooling pipe body part, a connector and a driving motor, the end part of the second cooling pipe body part penetrates through an arc-shaped guide hole in the connecting ring and then is fixedly mounted on the connector, and a second inserting gap used for being spliced with the first cooling pipe body part is formed in the second cooling pipe body part; the standby cooling module comprises a cooling plate and a connector base, a cooling medium flow channel is arranged in the cooling plate, and an elastic element is arranged on the back face of the connector base. Compared with the prior art, the problem that the cooling capacity of an existing laser cutting machine cooling system cannot be rapidly adjusted when a laser cutting head is cooled is solved.

According to the integrated thermal management method for the secondary circuit of the new energy automobile, mechanical abrasion or electrical faults are accurately recognized by monitoring the rotating speed and the current signal of the main water pump in real time, and the standby water pump is rapidly switched to guarantee circulation continuity of cooling liquid; meanwhile, the opening degree of the electric control valve is dynamically adjusted to optimize flow distribution of each branch, and the temperature of the battery is maintained in a safe interval in combination with multi-point temperature data fusion processing; in addition, by means of branch isolation and bypass channel switching, local faults can be handled in time, and the overall cooling capacity is maintained. According to the invention, the stability and safety of the thermal management system in multiple scenes are obviously improved.

A drive-bay radiator module has a form factor configured to be insertable into a drive bay of an information processing device, the drive bay being one of a set of drive bays each configured to receive a pluggable storage drive. The drive-bay radiator module includes a radiator which has an inlet liquid connector and an outlet liquid connectors. The module includes engagement features which are complementary to engagement features of the drive bays. The inlet liquid connector and the outlet liquid connector are configured to mate with liquid connectors in the drive bay, thus fluidically connecting the drive-bay radiator module with a liquid cooling loop of the system. The drive-bay radiator module may thus supplement the cooling capacity of a primary radiator installed in the liquid cooling loop within the system.

An electronic apparatus can record a moving image and sound, and includes a cooling unit that cools the apparatus, a setting unit that sets an operation mode of the cooling unit, and a control unit that controls the cooling unit based on the operation mode of the cooling unit. The control unit sets the operation mode of the cooling unit set by the setting unit, when sound recording is in progress, and sets the operation mode of the cooling unit to a driving state in which a cooling capability of the cooling unit is maximum, when sound recording is not in progress.

The invention relates to the technical field of intelligent manufacturing control, in particular to an air cooling control method and system for multi-aggregate pre-cooling. According to the scheme provided by the invention, classified and bin-divided independent pre-cooling is performed according to different aggregate particle sizes and pre-cooling characteristics, so that the cooling effect is good, the pre-cooling time is saved, and the working efficiency is improved. Furthermore, through periodic dynamic pre-cooling control and adjustment, in combination with real-time monitoring of the aggregate temperature of each bin and dynamic calculation of required cooling capacity distribution air cooling, synchronization of the cooling process of each aggregate is ensured, and the pre-cooled aggregates with different particle sizes and different characteristics synchronously reach the preset delivery temperature within the target time. Meanwhile, the scheme of the invention has good robustness for interference factors such as initial temperature fluctuation of the aggregate, environment temperature change and the height of the stock bin position, can automatically adjust the distribution strategy, and keeps the stability of the pre-cooling effect.

The application discloses a liquid-cooled super-charging charging pile, which comprises a cooling pipeline arranged in a cable, wherein the cooling pipeline comprises an exchange pipeline and a circulating pipeline, and the exchange pipeline is spirally arranged at a main heating position in the cable. The application can switch the internal and external circulation paths of the cooling liquid in the cooling pipeline through a switching end, and the cooling liquid can circulate in the exchange pipeline and the circulating pipeline during the internal circulation, and continuously exchanges heat with the cable. When the temperature of the cooling liquid reaches a set value, the switching end is switched again, the cooling pipeline and the cooling liquid in the heat dissipation component are interacted, the cooling liquid at low temperature enters the cooling pipeline, and the cooling liquid at high temperature enters the heat dissipation component to be circulated and radiated, so that the problems that the traditional liquid-cooled super-charging charging pile directly starts the maximum cooling capacity and the maximum circulation speed during operation, and the excessive cooling capacity increases the power consumption of the liquid-cooled super-charging charging pile are solved.

Method for controlling the operation of a fuel cell system, comprising the steps for: Diagnosing, by means of a control system, a water shortage condition in a fuel cell stack based on a decrease in cooling capacity and a deterioration of the fuel cell stack; Determine, by controlling, a diagnostic level of the fuel cell system based on the diagnosed water shortage state of the fuel cell stack; and Performing, by controlling, a regenerative operation by selecting a regenerative operating mode that corresponds to the specified diagnostic level, wherein the regenerative operating mode comprises: a first regenerative operating mode to reduce an operating limit temperature of the fuel cell stack; a second regenerative operating mode to increase an air pressure at the cathode side of the fuel cell stack or to decrease a stoichiometric ratio of air; and a third regenerative operating mode to decrease a hydrogen gas pressure at an anode side of the fuel cell stack or to increase a stoichiometric ratio of hydrogen.

The traditional Chinese medicine fumigation device comprises a fumigation box and an elastic cushion fixedly connected to the top of the fumigation box, a top cavity and a fumigation cavity are formed in the top and the interior of the fumigation box respectively, and a cooling cavity is formed in the fumigation box; the cooling capacity of the cooling cavity is further improved by improving the heat dissipation effect in the cooling cavity, maintaining the cooling capacity of cooling liquid in the cooling cavity and cooperating with continuous supplement of condensed water after steam condensation after suction, and in the continuous fumigation process, the cooling capacity of the cooling cavity is further improved by means of the intermittent reversing effect of a single air pump and a control valve. Meanwhile, wiping and liquid absorption of skin at the fumigated back and maintenance of the cooling capacity of the cooling cavity are achieved, good contact of continuous fumigation of the back is guaranteed, long-acting high-quality fumigation is maintained, meanwhile, the cooling capacity of the cooling cavity is maintained, and it is guaranteed that in the continuous fumigation process, traditional Chinese medicine hot steam can maintain the temperature after cooling for fumigation, and the fumigation effect is good. The fumigation effect is comprehensively improved, and the use effect is good.

This invention relates to the field of automotive motor cooling, and more particularly to an adaptive automotive motor cooling device. Existing cooling devices are not convenient for adjusting cooling intensity according to different environments, resulting in low cooling performance, energy waste, and reduced cooling capacity due to dust accumulation. An adaptive automotive motor cooling device includes a mounting base; two legs are fixedly connected to the mounting base, and side frames are fixedly connected to each leg. The side frames are hollow, and a connecting plate is fixedly connected between the two side frames, with a placement hole in the center of the connecting plate. By adjusting the angle of the air guide ring, different cooling intensities can be achieved, allowing for selection of different cooling intensities according to different scenario requirements, thus saving energy.

This cooling system is provided with: a battery pack in which a battery module is housed; the air inlet pipeline and the exhaust pipeline are connected with the battery pack; a blower disposed in a path from the intake duct to the exhaust duct; a predetermined sensor for detecting a detection value relating to cooling of the battery pack; a storage unit in which the detection value of the sensor and relationship information relating to the cooling capacity of the battery pack are stored; and a processing unit that determines the immersion water level on the basis of the relationship information and the detection value of the sensor.

The invention discloses a full-dynamic-pressure turbine type low-temperature refrigerating device and method. The device comprises a two-stage centrifugal compressor, a heat exchanger, a low-temperature turbine expander, a gas storage tank, a filter, a valve, a water cooling machine and a cold using device. Closed circulation is adopted in the device, and the whole device is integrated into a skid-mounted device to output cooling capacity outwards. The device adopts a full-dynamic-pressure turbine type structure and is supported by a gas bearing; the low-temperature turbine expander and the low-temperature heat exchanger are in a heat insulation environment; the low-temperature turbo expander adopts pressurization braking or fan braking; a three-stage integrated heat exchanger or a separated heat exchanger is adopted for skid-mounting; the skid-mounted system comprises a charging mode and a non-charging mode. The whole device runs without oil, and is clean and environment-friendly; the integration level of the system is greatly improved through the three-stage integrated heat exchanger and the skid-mounted structure; different braking modes are set, so that the applicability of the device is improved; the refrigerating temperature and the refrigerating capacity can be accurately controlled through the full-pressurization mode, the partial-pressurization mode and the bypass valve.

This application belongs to the field of refrigeration equipment control technology, and provides a frost-free refrigerator and a control method for the frost-free refrigerator. The frost-free refrigerator includes: a cabinet, with a refrigerator compartment, a freezer compartment, and a controller inside the cabinet; an evaporator is installed in the freezer compartment, and a fan motor is installed corresponding to the evaporator; the evaporator is used to generate the cooling capacity required for refrigeration operation; the fan motor is used to drive the cooling capacity generated by the evaporator to be transported to the refrigerator compartment and the freezer compartment; a first temperature sensing element is installed inside the refrigerator compartment for collecting the real-time temperature of the refrigerator compartment, and a second temperature sensing element is installed inside the freezer compartment for collecting the real-time temperature of the freezer compartment; the fan motor and the second... The first distance between the temperature sensing elements is greater than the second distance between the fan motor and the second temperature sensing element, so that the temperature drop rate of the freezer compartment is faster than that of the refrigerator compartment; the controller is connected to the fan motor; the controller is configured to: acquire the real-time ambient temperature of the environment in which the air-cooled refrigerator is located; if the real-time ambient temperature is within a preset low temperature range, output a first adjustment command, the preset low temperature range being determined based on a first preset temperature and a second preset temperature, wherein the first preset temperature is lower than the second preset temperature, the first adjustment command being used to instruct the fan motor to reduce its operating speed, and the refrigeration start-up time of the refrigerator compartment is negatively correlated with the operating speed.

The invention discloses a double-spindle turning and milling combined machining center, and relates to the technical field of machine tool machining, the double-spindle turning and milling combined machining center comprises a lathe bed, the lathe bed comprises a spindle unit, the spindle unit comprises a first spindle unit and a second spindle unit, and the first spindle unit and the second spindle unit are oppositely arranged in the horizontal direction and are both in sliding connection with the lathe bed through sliding mechanisms; and the main shafts are independently connected with main shaft driving motors. Temperature field distribution of different axial positions at the front end of the main shaft is identified in real time, each annular electromagnet is independently regulated and controlled to construct a non-uniform magnetic field gradient in the electric control heat conduction pad, and the magnetic response phase change microcapsules are driven to be directionally enriched towards a high-temperature area, so that cooling capacity space distribution and thermal load space distribution are dynamically matched in real time; and the main shaft thermal drift is actively inhibited from the source.

A reciprocating compressor is disclosed. The reciprocating compressor includes a housing, an electric motor, a compressor section, a crankshaft, and a counterweight. The counterweight may be equipped with a spill guide extending from a fixed portion toward the opposite side of the eccentric mass portion, guiding oil spilled from the oil flow path toward the compressor section. This causes a large amount of oil spilled from the oil flow path to be spilled further toward the cylinder and piston, thus ensuring a smooth supply between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston, thereby improving the compressor's cooling capacity and / or energy efficiency.

Provided is a cooling system that circulates a CO2-containing refrigerant and cools a battery or the like in a vehicle, wherein the cooling capacity of the battery is ensured while suppressing a decrease in the overall efficiency of the system. A cooling system (100) is provided with: a compressor (1) that compresses a refrigerant; a heat exchanger (2) for cooling the refrigerant from the compressor (1); heat exchangers (5a, 6a) that use the refrigerant cooled by the heat exchanger (2); a refrigerant passage (17) that supplies the refrigerant from the heat exchanger (2) to the battery (6) and that supplies the refrigerant to the compressor (1); an expansion valve (E2) provided in the refrigerant passage (17) on the upstream side of the battery (6); wherein the control device (80) maintains the opening degree of the expansion valve (E2) constant when the battery temperature is within a first region (R1), and sets the opening degree of the expansion valve (E2) to be greater than the opening degree of the first region (R1) when the battery temperature is within a second region (R2) on the high-temperature side, and increases the opening degree of the expansion valve (E2) as the battery temperature increases.

An ice-making evaporator has internal spaces of an evaporator main body and an ice-making member partitioned into a plurality of spaces. Refrigerant may be circulated in the partitioned plurality of spaces to cool the ice-making member, thereby increasing the contact time between the refrigerant and the ice-making member, and sufficiently exhibiting the cooling capacity of the refrigerant

The present disclosure provides a control method for a heat dissipation system, a heat dissipation system, an apparatus, and a storage medium. The control method for a heat dissipation system comprises: on the basis of a temperature difference of a first cooling medium between an inlet and an outlet of a primary side of a heat dissipation system and flow values of the first cooling medium at the inlet and the outlet of the primary side of the heat dissipation system, determining a cooling capacity of the primary side of the heat dissipation system; on the basis of a current temperature difference and a target temperature difference of a second cooling medium between an inlet and an outlet of each liquid cooled cabinet, determining a target total liquid cooling capacity of liquid cooling apparatuses in the heat dissipation system, wherein the liquid cooling apparatuses are used for cooling the liquid cooled cabinets; on the basis of the cooling capacity of the primary side of the heat dissipation system and the target total liquid cooling capacity, determining a target total air cooling capacity of air cooling apparatuses in the heat dissipation system; on the basis of the target total liquid cooling capacity and the target total air cooling capacity, determining a heat dissipation strategy; and operating according to the heat dissipation strategy.

This invention discloses a prefabricated atmospheric pressure refrigeration system, relating to the field of refrigeration system technology. It includes: a power grid information interaction module, used to acquire real-time data on off-peak electricity hours, the maximum allowable load during those hours, and power grid load fluctuations; preprocessing the acquired data to obtain standardized power grid data; and a cooling demand prediction module, used to calculate the hourly cooling demand assessment value for the next day based on the system's historical hourly total cooling capacity data, real-time environmental parameters, and the operating plans of major terminal equipment, using a preset prediction model, and outputting the system's total cooling demand curve and peak cooling capacity. This invention, by calculating the next day's cooling demand assessment value and combining it with historical hourly cooling capacity, real-time temperature and humidity, and equipment operating plans, can accurately predict the cooling demand for each time period of the next day, ensuring that cooling capacity preparation matches the actual cooling scenario, avoiding insufficient cooling supply that could affect production or office cooling, and also avoiding excessive cooling capacity storage that could lead to energy waste.

The invention discloses a semi-closed reciprocating refrigeration compressor for ammonia, and relates to the technical field of refrigeration. Comprising a semi-closed machine shell, and a compression mechanism and a driving motor which are arranged in the machine shell. A stator winding of the driving motor is made of an aluminum or aluminum alloy material so as to resist corrosion of an ammonia refrigerant; the compression mechanism is of a reciprocating piston type structure; in addition, the driving motor directly drives the reciprocating piston type compression structure to operate, and a traditional shaft seal and a traditional coupler are omitted. The crankshaft also serves as a motor shaft, and direct connection driving is achieved. And integrally-formed radiating fins are arranged at the position, corresponding to the motor, outside the shell so as to enhance the radiating and structural strength. And the air suction port is communicated to the motor cavity, so that low-temperature ammonia gas flows through the motor to cool the motor before being compressed. The invention effectively solves the problems of ammonia corrosion and leakage, has the advantages of high sealing property, high transmission efficiency, low operation noise and the like, is particularly suitable for ammonia refrigeration scenes with medium and small cooling capacity and high pressure ratio, and fills the technical blank in the field.

A climate control system includes: a working fluid including a blend of first and second refrigerants; an accumulator; a compressor that receives the working fluid from the accumulator; a first heat exchanger disposed downstream of the compressor; a liquid-to-suction heat exchanger disposed downstream of the first heat exchanger and upstream of a receiver; a first expansion valve disposed between the liquid-to-suction heat exchanger and the receiver; a second expansion valve disposed between the receiver and a second heat exchanger, the second heat exchanger receiving the working fluid from the second expansion valve, at least partially vaporizing the working fluid, outputting the at least partially vaporized working fluid to the liquid-to-suction heat exchanger; and a control module configured to selectively adjust opening of the first and second expansion valves based on (a) decreasing capacity and increasing working fluid concentration and (b) increasing capacity and decreasing working fluid concentration.

The invention relates to a refrigerator and a control method thereof. The refrigerator comprises a refrigerator body, a storage assembly and a refrigerating system. The box body is provided with a storage chamber. The storage assembly is located in the storage chamber and comprises a phase change material. The refrigerating system is configured to provide cooling capacity for the storage chamber. The phase change temperature and the temperature of the phase change material are obtained. And then according to the phase-change temperature of the phase-change material and the temperature of the phase-change material, the cooling capacity provided by the refrigerating system is controlled so that the deviation value between the phase-change temperature of the phase-change material and the temperature of the phase-change material can be smaller than a preset value. In this way, the supply amount of the refrigerating capacity is controlled according to the temperature of the phase-change material, and therefore the temperature of the phase-change material tends to the phase-change temperature. The phase-change material enables the storage chamber to be at the phase-change temperature stably through cold storage and cold release, the temperature of the storage chamber is not prone to change when the door is opened and closed repeatedly, and stability is good. And the phase change material is used for cold storage and cold release, so that energy consumption can be reduced.

The low-resistance mixed ventilation cooling system comprises an axial flow fan arranged on a cooling tower, wind shielding roller shutters are arranged on the portions, located on the two sides of the axial flow fan, of the cooling tower correspondingly, and the end faces of the sides, away from the axial flow fan, of the two wind shielding roller shutters are connected to a cooling triangle through wind guiding walls; the cooling triangle is connected with a cooling working medium conveying assembly; an electric winding and unwinding device is arranged on the wind shielding roller shutter, and the electric winding and unwinding device and a start-stop controller of the axial flow fan are in communication connection with a controller. The controller controls the axial flow fan and the wind shielding roller shutter to be started and stopped based on the obtained operation and maintenance parameters. Switching of the axial flow fan and the wind shielding roller shutter is controlled through operation and maintenance parameters, output of the cooling system is controlled by rapidly switching operation modes, the cooling capacity of the condenser is matched in time, back pressure fluctuation is effectively restrained, and unit peak regulation is adapted; meanwhile, the size of a conventional air cooling tower is reduced, and strong wind resistance and winter anti-freezing capacity of the cooling tower are improved.