397 results about "Cold area" patented technology

The invention relates to the technical field of snow melting disaster early warning, in particular to a snow surface rain disaster identification method based on a high and cold mountainous area and a related product, and the method comprises the steps: constructing a snow surface rain disaster single-point identification rule capable of being physically explained by using meteorological observation data and remote sensing inversion data of a small amount of weather stations in the high and cold mountainous area; the method is advantaged in that classification is carried out without depending on a black box model, precision and interpretability of single-point snow surface rain event discrimination are improved, regional popularization is carried out through dynamic downscaling simulation of a regional climate mode WRF coupling land surface process model Noah-MP, a point-surface fusion snow surface rain disaster discrimination and identification system is constructed, and the method is advantaged in that the method is simple and convenient to operate. The method is suitable for identifying snow rain disasters in complex terrain areas with high and cold areas, high altitude, large gradient, lack of data, even no data and the like, and solves the technical problems of insufficient snow rain disaster space identification capability and low precision caused by sparse observation data in the high and cold mountainous areas in the prior art.

The invention relates to the field of data storage, in particular to a storage and calculation separation multi-dimensional data block indexing method based on adaptive learning. Comprising the steps of receiving original multi-dimensional data and a query load, and outputting a low-dimensional key set through a first model; the low-dimensional key set and the historical query load generate a partitioning scheme through a second model, and the partitioning scheme performs physical recombination on the original multi-dimensional data to output a plurality of physical data blocks; constructing a learning type index through the physical data blocks and the corresponding partitioning schemes; identifying hot spot and cold spot areas through the query frequency of each node of the learning type index and the real-time query load continuous monitoring index; when the access mode changes, adjusting the index structure, and outputting a self-adaptive index; and quickly positioning and reading the target data block through the self-adaptive index to complete access. According to the method, the index of adaptive learning is provided, and the index structure and the physical data layout are adjusted, so that the query accuracy and efficiency in a complex scene are improved, and the data storage overhead is reduced.

The invention discloses an alpine meadow aboveground biomass monitoring method based on PROSAIL-BP, and belongs to the field of ecological remote sensing information processing. In order to overcome the defect that samples in the alpine region are insufficient and have high precision and high reliability, the method comprises the steps that an alpine meadow mask, remote sensing images and field biomass data in a target region are obtained, the remote sensing images are spliced, the wave band reflectivity is normalized, and the grassland region reflectivity is reserved in combination with mask cutting; predefining a PROSAIL model matched with the region features; performing Sobol global sensitivity analysis to obtain a first-order sensitivity index and a total-order sensitivity index of the parameter; screening a key wave band and four high-sensitivity parameters; uniformly sampling to generate a parameter group, simulating a hyperspectrum through PROSAIL, extracting the reflectivity of a key wave band, and constructing a data set by multiplying a leaf area index by a dry matter content as a target variable; and training a three-layer BP neural network, and processing the reflectivity output pixel biomass of the remote sensing key wave band. The method is applied to a remote sensing information processing system and has high precision and high reliability.

A system and method for controlling motorized vents of an HVAC system of a vehicle including at least one motor to move air louvers of an HVAC vent of the HVAC system, at least one thermal sensor to sense hot / cold areas inside the vehicle, and a position and motion control to control movement of the at least one motor, wherein position and motion control determines a targeted positioning of airflow based on hot / cold areas sensed by the thermal sensor.

The invention discloses a method for preserving heat of a urea NaOH and Mg (OH) 2 storage cabin, and aims at a ship which is provided with an SCR (Selective Catalytic Reduction) system, an EGR (Exhaust Gas Recirculation) system, an iCER (Initial Continuous Emission Reduction) system and a desulfurization system and needs to store urea, NaOH or Mg (OH) 2. Condensed water of the air conditioning unit is collected and then introduced into the storage cabin in a gravity mode, and the condensed water generation amount and the condensed water temperature of the air conditioning unit are analyzed and calculated. On the premise that the cabin capacity meets the condition, condensate water is used for cooling the urea cabin and then discharged into the clean cabin bottom water cabin, and the cooling capacity of the condensate water is utilized to the maximum extent. In winter or in a cold area, when the air conditioning unit does not need to operate, in order to avoid too low temperature of the solution cabin, the storage cabin can be heated by using the discharged water in the clean cabin bottom water cabin before discharging, so that the storage temperature of the urea, NaOH or Mg (OH) 2 solution is ensured to be 10-35 DEG C.

The invention discloses an anti-freezing device for a winter hydrological monitoring system in a severe cold area, and the anti-freezing device comprises water disturbance equipment which is provided with a water outlet located in water in a hydrological monitoring cylinder. And the water disturbance equipment continuously conveys water to water in the hydrological monitoring cylinder through the water outlet so as to disturb the water in the hydrological monitoring cylinder. According to the device, disturbance equipment, such as a submersible pump or a centrifugal pump, is integrated in a hydrological monitoring cylinder through an integrated frame; the disturbance equipment goes deep into a certain water level and then continuously disturbs a water body so as to achieve the anti-icing effect.

The invention discloses a hydrolysis-resistant low-temperature-resistant bi-component nano acrylate grouting plugging material and a preparation method thereof. The plugging material is prepared by mixing a component A and a component B according to a volume ratio of 1: 1, the component A is prepared from the following components in parts by mass: 25 to 40 parts of acrylate, 12 to 20 parts of hydrolysis-resistant modified component, 3 to 8 parts of low-temperature-resistant functional component, 8 to 15 parts of nano modified filler, 0.3 to 0.8 part of cross-linking agent, 1.5 to 3.0 parts of accelerant, 0.3 to 0.6 part of pH regulator and 40 to 50 parts of deionized water; the component B is prepared from the following components in parts by mass: 1.5 to 2.5 parts of a composite initiator, 0.2 to 0.5 part of a low-temperature catalyst, 0.8 to 1.5 parts of a dispersion stabilizer, 0.3 to 0.8 part of a hydrolysis-resistant auxiliary agent and 90 to 100 parts of deionized water; the plugging material meets the following performance indexes: the 28d compressive strength is greater than or equal to 6.5 MPa, the strength retention rate is greater than or equal to 85% when the plugging material is soaked in distilled water at 50 DEG C for 30 days, the strength loss is less than or equal to 10% when the plugging material is frozen and thawed for 30 times at-30 DEG C, the 28d bonding strength with a concrete base material is greater than or equal to 2.5 MPa, the 0.1 mm micro-crack penetration depth at 25 DEG C is greater than or equal to 60 mm, and the setting time at 25 DEG C is 30 seconds to The method can effectively meet the requirement for leakage water treatment in the high-humidity and high-water-pressure environment of underground engineering in the cold region.

The invention provides a thermoelectric coupling-based multi-target energy-saving scheduling method for a thermal power generating unit in an alpine region. The method comprises the steps of obtaining historical unit operation data, historical heat supply network operation data and historical meteorological data; constructing a training sample based on the historical unit operation data, the historical heat supply network operation data and the historical meteorological data, and performing offline training by adopting a regression algorithm to obtain a thermoelectric coupling scheduling model; the thermoelectric coupling scheduling model is used for mapping the input feature into a target scheduling control quantity; in the operation process, unit operation data, heat supply network operation data and external weather prediction data which are collected in real time are input into the thermoelectric coupling scheduling model, and prediction scheduling control quantity is generated; and generating a scheduling execution instruction based on the predicted scheduling control quantity, and issuing the scheduling execution instruction to a unit control system for execution. According to the method, combined optimization of the power generation process and the heat supply process can be achieved, the method can well adapt to weather changes in the alpine region, energy consumption can be reduced, and the stability of unit operation can be improved.

The invention belongs to the technical field of ground source heat operation management, and particularly discloses an intelligent operation management system for geothermal energy in a severe cold area. The system comprises an acquired data verification module, a soil dynamic analysis module, a thermal imbalance risk prediction module and a control priority determination module. According to the method, geothermal operation data are collected and verified in real time, key indexes such as heating power, soil accumulated heat taking capacity and heat recovery rate are calculated, meteorological prediction data are combined to drive a soil heat transfer model to conduct prospective simulation, and a heat imbalance risk index is output. And the control priority of the heat supply quality and the soil heat imbalance is dynamically determined and output based on the risk index and the change trend thereof, so that the heat recovery capability of the soil is effectively maintained while the heat supply requirement is met, and meanwhile, the priority management direction between the heat supply quality guarantee and the soil heat imbalance prevention and control is defined; and therefore, effective balance is realized between maintaining the heating demand of the user and protecting the sustainability of terrestrial heat.

Various illustrative systems, devices, and methods for face masks are provided. In general, a face mask is configured to provide cooling therapy to a user wearing the face mask. In an exemplary implementation, the face mask includes a thermoelectric cooling device, such as a Peltier device, a thermoelectric cooler (TEC), or other thermoelectric cooling device. The thermoelectric cooling device is configured to generate heat through a thermoelectric effect where a heat flux is created at a junction of two different types of materials. The heat flux creates a cold area and a hot area. The cold area is configured to face toward the user's face to provide cool energy to the user's skin.

A method for improving the temperature uniformity of microwave heating is characterized by adding auxiliary materials containing temperature-sensitive electromagnetic materials simultaneously inside, outside, or both inside and outside the material. This causes the heating capacity of the material as a whole or a specific local area within a desired temperature range to decrease as the temperature increases, thereby making the temperatures of hot and cold areas within this temperature range more similar. This invention can significantly improve the temperature uniformity of microwave heating, eliminates the need for complex temperature monitoring methods, and has a wide range of applications.

The utility model discloses an integrated heat dissipation decoration ring structure which comprises an inner lampshade and an outer lampshade which are arranged inside and outside, an LED module is arranged on the back side of the inner lampshade, and a heat dissipation decoration ring is further arranged between the outer lampshade and the inner lampshade. The radiating decorative ring comprises a radiating fin body arranged on the back of the LED module, a plurality of radiator connecting ribs connected with the radiating fin body and located on the side of the inner lampshade, a connecting plate connected with the radiator connecting ribs and located on the front side of the inner lampshade, and a plurality of radiating fins arranged on the connecting plate and bent towards the outer lampshade. The heat dissipation structure can be combined with the decoration ring in a limited space, the number of parts is reduced, meanwhile, the heat dissipation performance can be guaranteed, and the problem of mist generated by a local cold area of the outer lampshade can be solved.

The utility model provides a prestressed reinforced concrete pier reinforcing device, which relates to the technical field of bridge engineering and comprises a pier body, a first limiting block arranged on one side of a first hoop, a first bolt arranged on one side of the first limiting block, a fourth limiting block arranged on one side of the first hoop and a third limiting block arranged on one side of a second hoop. The protection pads are arranged at the two corners of the interior of the first hoop and the two corners of the interior of the second hoop respectively, the five water leakage holes are formed in the protection pads, in this way, rainwater cannot form accumulated water at the tops of the first hoop and the second hoop during use, the corrosion effect of the accumulated water on the pier is reduced, and in a cold region, the bridge pier is protected from being damaged. The damage of frost heaving caused by accumulated water freezing to the bridge pier can be reduced without accumulated water, so that rainwater can be drained in time to prevent the hoop from bearing the weight of the accumulated water for a long time, the reinforcing effect of the hoop on the bridge pier is guaranteed, the hoop can play a role more stably, and the service life of the bridge pier is greatly prolonged.

Various illustrative systems, devices, and methods for face masks are provided. In general, a face mask is configured to provide cooling therapy to a user wearing the face mask. In an exemplary implementation, the face mask includes a thermoelectric cooling device, such as a Peltier device, a thermoelectric cooler (TEC), or other thermoelectric cooling device. The thermoelectric cooling device is configured to generate heat through a thermoelectric effect where a heat flux is created at a junction of two different types of materials. The heat flux creates a cold area and a hot area. The cold area is configured to face toward the user's face to provide cool energy to the user's skin.

The present disclosure relates to a cold-resistant medium-voltage power cable, includes a cable body, wherein a bending protection sleeve is slidably sleeved over an outer end of the cable body. Through the cooperative use of the bending protection sleeve, the clamping disc, the flexible electric heating patch, and the bending sensing assembly, on one hand, the arrangement reduces the difficulty in bending the cable body during installation, prevents damage to the cable body caused by excessive bending, and improves the efficiency and safety of installing the cable body in cold regions; on the other hand, the arrangement enables heating treatment at a bent installation section of the cable body. This configuration not only enhances flexibility of the cable body during installation, reducing damage to internal conductive cores of the cable body, but also provides continuous thermal protection to the bent installation section during subsequent operation of the cable body.

The invention relates to a vehicle-mounted video management system suitable for an extremely cold region. The vehicle-mounted video management system comprises a terminal storage layer, a data transmission layer and a platform management layer, the terminal storage layer is integrated with a double-hard-disk redundant storage unit, a low-temperature self-adaptive heating module, a video acquisition module, an intelligent control module and a video data processing unit; the data transmission layer realizes bidirectional data interaction with the 4G / 5G communication module through a vehicle bus; the platform management layer is a cloud management platform and has the functions of equipment panoramic monitoring, operation and maintenance work order automatic management and multi-dimensional data analysis. Through the PTC heating module and the constant-temperature control logic, the problems that traditional equipment is difficult to start at low temperature and unstable in reading and writing are solved, wide-temperature stable operation from-40 DEG C to + 70 DEG C, a double-hard-disk redundant architecture and a logic reconstruction algorithm are achieved, it is ensured that data are not lost when a single hard disk breaks down, the data perfectness rate is increased, the video reading rate is increased, and the service life of the equipment is prolonged. And end-cloud cooperative fault closed-loop management is realized, and automatic fault inspection, real-time alarm and forced shutdown are realized.

The utility model provides a kitchen air conditioner, and relates to the technical field of kitchen appliances. The kitchen air conditioner comprises a shell, a partition plate, an electric control box and a sealing structure. The sealing structure is provided with at least one sealing plate. The partition plate divides the cavity into a cold area and a hot area which are transversely arranged side by side, and at least the hot area of the shell is provided with an opening facing the front side of the kitchen air conditioner; the electric control box is arranged in the cold area, and the sealing plate covers the opening and is connected with the shell and the partition plate so as to at least form local sealing of the hot area. The side, close to the partition plate, of the electric control box is at least provided with a connecting part, the edge of the side, close to the partition plate, of the sealing plate is connected with the partition plate, and the connecting part is pressed on the edge of the front side of the sealing plate. When the electric control box is disassembled and assembled, the influence on the assembly of the sealing plate is avoided, so that the influence on the sealing of the hot area is avoided, and the sealing effect of the hot area is improved to the maximum extent.

The invention discloses a method, a system, equipment, a medium and a product for determining the state of a tower leg of a power transmission tower in a severe cold area, and relates to the field of tower leg freezing damage calculation, the method comprises the following steps: determining a water layer transient temperature field of the tower leg of the power transmission tower based on a finite element simulation mode according to a heat conduction differential equation and boundary conditions of a water layer; based on a finite element simulation mode, treating phase change latent heat of the water-ice phase change interface by adopting an apparent heat capacity method, and determining a phase change result; the phase change result is icing thickness; according to the tower leg structure parameters, the tower leg steel yield strength is determined; based on the transient temperature field of the water layer, the extrusion pressure intensity of ice on the tower legs is determined in combination with the icing thickness; according to the tower leg structure parameters, the icing thickness and the extrusion pressure intensity, tower leg combined stress is determined; determining the state of the tower leg according to the combined stress of the tower leg and the yield strength of tower leg steel; the tower leg state comprises a freezing damage risk state and a safety state. The method can quickly identify the freezing damage condition of the tower leg.

The utility model relates to the technical field of cooling devices, in particular to a cooling device for a plastic floor backing material. According to the technical scheme, the cooling device comprises a cooling box, the cooling box is vertically through, a discharging hopper is fixedly installed on the lower surface of the cooling box, an air locking discharging valve is fixedly installed on the lower surface of the discharging hopper, a plurality of inclined plates are fixedly installed on the two sides of the inner wall of the cooling box at equal intervals from top to bottom, and the inclined plates on the two sides of the inner wall of the cooling box are arranged in a staggered mode; an air inlet pipe is fixedly connected to the position, close to the lower surface, of one side of the outer surface of the cooling box, and a cold area fan is fixedly installed in the air inlet pipe. According to the plastic floor backing material cooling device, a plastic floor backing material can be rapidly cooled in an air cooling mode, water resources are saved, the subsequent drying procedure is omitted, the cooling efficiency is improved, and meanwhile the cost is reduced.

The utility model belongs to the technical field of battery systems, and discloses a fireproof and heat-insulating composite structure of a cylindrical battery and a battery system, and the heat-insulating composite structure comprises an intumescent flame-retardant layer and a heat-insulating supporting layer, wherein the expansion flame-retardant layer is arranged on the outer side face of the cylindrical battery body in a sleeving mode, and the thermal insulation supporting layer wraps the outer side of the expansion flame-retardant layer. The expansion flame-retardant layer in the heat insulation composite structure can prevent heat transfer enhancement caused by increase of a contact surface between the battery bodies after thermal runaway, and the expansion flame-retardant layer can expand to buffer extrusion between the batteries after thermal runaway, so that extrusion thermal runaway is prevented. The heat insulation supporting layer can effectively keep the reasonable working temperature of the battery in a cold region.

The present application relates to chemical technology field, especially a kind of ethane cracking device and start-up emission reduction method, including cracking section, compression section, separation section, separation section includes deethanizer, cold area, hot area, with deethanizer as limit, deethanizer top connects cold area, bottom connects hot area, cold area includes carbon two hydrogenator, demethanizer, ethylene column, cold box, refrigeration system, deethanizer top pipeline is connected with carbon two hydrogenator, hydrogenated material is cooled in cold box, one way output hydrogen, another way is connected with demethanizer, demethanizer top outputs methane, bottom is connected with ethylene column, ethylene column top exports ethylene, bottom exports ethane, refrigeration system is cooled to carbon two hydrogenator export material, demethanizer top, bottom material, ethylene column top, bottom material of ethylene column, the present application has the following beneficial effects: not only can shorten the product qualified time of each system after cracking furnace feed, reduce start-up emission, but also can improve the safety of operation.

The invention belongs to the technical field of electrolytic cell temperature control, and relates to a temperature control method and system for an SOEC under the renewable energy source fluctuation condition, and the method comprises the steps: collecting the real-time operation temperature of each region of the SOEC, monitoring the fluctuation condition of the output of the renewable energy source, and when the fluctuation occurs, controlling the temperature of the SOEC; carrying out feed-forward adjustment by utilizing an MPC algorithm model; smoothly adjusting the heating power and the total air inflow of different areas; comparing the real-time operating temperature with a preset operating temperature to obtain a first temperature deviation value, and determining a hot area and a cold area; the MPC algorithm model is used for conducting feedback adjustment on all the subareas; the heating power and / or the gas flow of the cold area are / is increased; and reducing the heating power of the hot area or stopping heating, and / or reducing the gas flow of the hot area. According to the invention, intelligent temperature control with adaptive capability of the SOEC can be realized, the internal working temperature of the SOEC can be kept stable, and local efficiency reduction or faults caused by uneven temperature or overshoot can be reduced at the same time.

The invention discloses a high-temperature metal bag type dust collector with a state self-sensing function, and relates to the technical field of bag type dust collectors, the high-temperature metal bag type dust collector with the state self-sensing function comprises a support, a dust collection bin is mounted on the support, a flow equalizing bin is mounted below the dust collection bin, and a mounting plate is mounted in the dust collection bin; a plurality of mounting holes are formed in the mounting plate, filter bags are mounted on the mounting holes, an air inlet is formed in one side of the flow equalizing bin, an air inlet pipe is mounted on the air inlet, a pulse piece is mounted on the air collecting bin, an adjusting assembly is arranged at each mounting hole, the pulse pieces are adjusted in real time by detecting working conditions, and a flow dividing assembly is arranged on the flow equalizing bin. The high-temperature flue gas uniformly flows to each filter bag, and the adjusting assembly can monitor the air pressure difference in the dust removal bin in the filter bag in real time so as to judge whether a hot spot or a cold area appears on the filter bag or not, control the pulse dust removal strength according to the detection result, weaken the influence of the hot spot or the cold area, and improve the filtering efficiency and the filtering quality of the filter bag.

The embodiment of the invention provides a device for inhibiting a molten salt stratification in a molten salt tank. The device comprises an electric rotary vane assembly, a drainage structure and a plurality of flow guide channels. The first end of the electric rotary vane assembly is used for providing driving force, and the second end of the electric rotary vane assembly is used for forcibly stirring fused salt in the fused salt tank to form a disturbance flow field. The drainage structure is arranged at the bottom of the molten salt tank and used for expanding the action range of the disturbance flow field at the bottom of the molten salt tank and guiding molten salt to flow towards the bottom and the side wall of the molten salt tank. The flow guide channel is arranged on the side wall of the molten salt tank and used for enabling the molten salt to form a vertical backflow path along the side wall of the molten salt tank under the action of the disturbance flow field. The device for restraining the molten salt stratification in the molten salt tank can serve as a supplement or standby means of an existing pump circulation system, quick intervention is achieved when temperature difference sudden increase occurs in the tank bottom and the side wall cold area, local temperature homogenization is achieved through physical stirring and drainage, and therefore the safety and stability of overall operation of the molten salt tank are improved.

The invention relates to the technical field of power cables, and discloses an overhead insulated cable for a power transmission network, which comprises a conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulation shielding layer, an outer shielding layer, a belting layer, an armor layer and an outer sheath, and is arranged between the crosslinked polyethylene insulating layer and the insulation shielding layer through a soaking assembly. The soaking assembly comprises an X-shaped framework, a semi-conductive nano elastomer and a nano-porous heat exchange micro-column. A heat dissipation assembly is arranged between the insulation shielding layer and the outer shielding layer, and the heat dissipation assembly comprises a double-Y-shaped communicating framework, a heat conduction insulation material and a hollow cavity; the buffer assembly is arranged between the outer shielding layer and the belting layer, the buffer assembly comprises the regular hexagon protection framework, the storage groove and the self-repairing semi-conductive elastomer, efficient soaking, stable heat dissipation and stress buffering are achieved, the high-cold overhead power transmission scene is adapted, and the application and popularization value is high.

The application discloses a method for determining the low-temperature discharge capacity of a new energy vehicle, comprising the following steps: step 1, vehicle invasion process: allowing the vehicle to sufficiently reduce the temperature at a set temperature; step 2, cold start process: starting the vehicle; step 3, discharge process: recording parameter information while performing vehicle acceleration operation; and step 4, obtaining the low-temperature discharge capacity result of the new energy vehicle. The application can reliably determine the low-temperature discharge capacity of the new energy vehicle, improves the reliability of the vehicle in cold regions, is convenient for vehicle enterprises to verify the related performance of the vehicle, and can edit more accurate vehicle use instructions.

The utility model discloses a heating disc assembly and a cooking utensil. The heating disc assembly comprises a disc body, a heat conduction piece and a heating piece. The tray body comprises a tray body. The heat conduction piece is arched relative to the disc body so that a heat transfer cavity can be defined by the heat conduction piece and the disc body, and the heat transfer cavity is located in the area from the edge of the disc body to the center of the disc body and further extends in the circumferential direction of the disc body. The heating piece is opposite to the heat conduction piece and comprises a cold end and a hot end. And the cold end and the hot end are in contact with the bottom wall of the heat transfer cavity. Therefore, although the calorific value of the cold end is smaller than that of the hot end, based on the arrangement, heat of the cold end and the hot end is transmitted to the heat transfer cavity, the heat transfer cavity is large enough relative to the area, making contact with food, of the heating disc assembly, and the temperature of the heat transfer cavity is uniform, so that the area, making contact with the food, of the heating disc assembly does not have a cold area or a hot area; and the bottom pasting phenomenon can be reduced or avoided.

The present application relates to highland oxygen supply technical field, especially disclose a kind of highland cold area pressurization oxygen-increasing tent, including pressurized air cushion and oxygen tent, the pressurized air cushion includes wear layer, heat insulation layer is fixed above wear layer, air cushion layer is fixed above heat insulation layer, heating layer is fixed above air cushion layer, resistance wire is fixed in heating layer, resistance wire is electrically connected with temperature controller, heat penetration layer is fixed above heating layer, the air cushion layer includes a plurality of side-by-side fixed together Tesla pipe.Affinity effect lies in: by the one-way ventilation principle of Tesla valve is applied to highland oxygen supply pipeline mechanics, realize the pressure increase of highland diffusion oxygen supply, by setting oxygen tent outside pressurized air cushion, reduce oxygen diffusion speed, form a high concentration of oxygen-rich environment, effectively improve the utilization efficiency of oxygen, reduce oxygen loss, create oxygen-rich sleep environment for sleeper, improve the comfort of highland sleep.

This invention provides a mechanical parking system that allows for automatic control of door closing during vehicle exit, making it suitable for cold regions with snowfall. [Solution] The mechanical parking system includes an entry / exit area accessible through an entrance / exit, a storage area, an entrance / exit door for opening and closing the entrance / exit, a transport device for transporting vehicles between the entry / exit area and the storage area, an object detection sensor that defines the area of ​​movement of vehicles and users in the entry / exit area as a monitoring area and detects objects to be detected in the monitoring area, an operation panel, and a control device that operates the entrance / exit door and the transport device. The control device includes a first determination unit that determines whether the monitoring area is unoccupied based on detection information from the object detection sensor, a second determination unit that determines whether the monitoring area is unoccupied based on information input from the operation panel, a switching unit that sets the second determination unit as the main determination unit when snowfall is predicted and the first determination unit as the main determination unit when snowfall is not predicted, and an operation control unit that closes the entrance / exit door based on the determination result of the main determination unit.

The embodiment of the invention relates to the technical field of heat exchange, in particular to a heat exchange system. The heat exchange system comprises a first evaporator, a first heat exchanger and a first water storage tank. The first evaporator is provided with a first inner cavity for containing water, the bottom of the first inner cavity communicates with a first switch valve for controlling air introduction, the top of the first inner cavity communicates with a first vacuum pump, and a first perforated plate is arranged on the side, close to the first switch valve, of the wall of the first inner cavity. Air introduced by the first switch valve passes through the first perforated plate and then generates a plurality of bubbles in water, the first vacuum pump extracts gas in the first inner cavity and enables the pressure in the first inner cavity to reach a preset condition, and the water in the first inner cavity generates a bubble enhanced evaporation phenomenon; the first heat exchanger communicates with the first vacuum pump. According to the heat exchange system, when the air source heat pump type water heater is used in a cold region, the liquidity of refrigerant water is guaranteed, and the application territorial range of the air source heat pump type water heater with water as the refrigerant is expanded.