3187 results about "Cold medium" patented technology

The invention discloses an energy-saving control method and system based on a large refrigeration house, and the method comprises the steps: S1, obtaining cargo attribute information in real time through a cargo label, and inputting a dynamic load prediction model to generate a cooling capacity demand prediction signal in a future time period; s2, generating a multi-device cooperative control signal based on the cooling capacity demand prediction signal in the future period; s3, a shelf-level cooling capacity demand distribution signal is generated in combination with the cooling capacity demand prediction signal; s4, generating a directional cold airflow path signal matched with goods shelf distribution according to the goods shelf level cold capacity demand distribution signal; and S5, closed-loop feedback adjustment is conducted on the compressor frequency, the refrigerant flow and the air valve opening through an edge calculation module, and a dynamic balance control instruction of cooling capacity supply and space distribution is generated. The intelligent air quality monitoring method and system based on sensing data feedback can solve the problems of excessive refrigeration energy consumption waste caused by inaccurate cold capacity demand prediction of a large refrigeration house and extra energy loss caused by low cooperative efficiency of multiple devices.

The invention discloses a temperature swing adsorption helium low-temperature purification system which comprises a vacuum cold box, and a first-stage dividing wall heat exchanger, a liquid cold medium Dewar, a high-temperature area adsorption unit, a second-stage dividing wall heat exchanger, a cold head heat exchanger and a low-temperature area adsorption unit are sequentially connected in the vacuum cold box in the gas transmission direction. Wherein the input end of the first-stage dividing wall heat exchanger is connected with the outside through a pipeline, and is used for introducing crude helium; the high-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being greater than or equal to 77K in the crude helium, and the low-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being 20K-30K in the crude helium, so that high-purity helium is obtained. According to the invention, not only can high-flow high-component impurity gas with the boiling point of 77K or above be treated, but also high-flow high-component impurity gas with the boiling point of 30K or below can be treated, and high-flow multi-component high-concentration industrial production working conditions can be better matched by adopting physical adsorption of the high-temperature and low-temperature region adsorbents.

The utility model relates to a reaction device capable of quickly heating, cooling and maintaining temperature. According to the reaction device, a three-way valve temperature control device consisting of a set of thermal medium circulator, a set of cold medium circulator, a control unit and two temperature control adjusting motor control three-way valve rotating devices is arranged on the reaction kettle, so that the temperature of the reaction kettle of the reaction device can be increased or decreased within half a minute (even shorter time); the problem that the reaction kettle cannot be rapidly heated and cooled in the reaction process is solved; for heat absorption and heat release experiments, the dynamic balance of the temperature can be maintained by setting a fixed reaction temperature; installation is simple, and operation is convenient; the problem of waste of water resources is solved; the temperature control range is wide, and when a water medium is used, the temperature control range is 1-95 DEG C; when a silicone oil medium is used, the temperature control range is-50 to 250 DEG C; the rotatable distillation head is mounted at the upper part of the reaction kettle and is directly rotated during use, so that the functions of condensation reflux and distillation extraction can be simultaneously realized.

The invention discloses a novel energy storage vehicle-mounted refrigerator and a control method, and relates to the technical field of refrigeration. The device comprises a box body, a novel energy storage heat exchange system and a control system, the novel energy storage heat exchange system comprises an energy storage body containing a cold storage medium; the cooling channel penetrates through the air duct system of the energy storage body; the heat exchange part is communicated with the vehicle-mounted refrigerating system and comprises a first heat exchange structure in contact with the cold storage medium; and the air guide part drives air to flow through the cooling channel. The first heat exchange structure is provided with a channel and / or a heat exchange piece used for circulating a refrigerant of the vehicle-mounted refrigerating system, and the first heat exchange structure is used for efficiently transmitting the cooling capacity of the refrigerant of the vehicle-mounted refrigerating system to the cold storage medium and / or transmitting the cooling capacity to air through the wall of the cooling channel. Optionally, a second heat exchange structure is arranged in the cooling channel to further strengthen heat exchange of the air. By optimizing the heat exchange structure, the efficiency of refrigerating and cold accumulation by using the vehicle-mounted refrigerating system is improved.

The utility model discloses a cooling air cooling system for glass tempering. The cooling air cooling system comprises a heat exchange air bellow, a primary heat exchanger and a secondary heat exchanger, an input port of the heat exchange air bellow is used for communicating with an output port of the fan, and an output port of the heat exchange air bellow is used for communicating with a cooling air input port of the air grid quenching section; the first-stage heat exchanger and the second-stage heat exchanger are installed in the heat exchange air box, the first-stage heat exchanger is close to an input port of the heat exchange air box, and the second-stage heat exchanger is close to an output port of the heat exchange air box. The temperature of the refrigerant circularly flowing in the second-stage heat exchanger is lower than the room temperature and lower than the temperature of the cooling water circularly flowing in the first-stage heat exchanger; the first-stage heat exchanger and the second-stage heat exchanger are used for exchanging heat with cooling air input into the heat exchange air box and making the temperature of the cooling air output by the heat exchange air box lower than a set temperature threshold value, and the temperature threshold value is not higher than the room temperature. Through heat exchange, the temperature of cooling air output by the heat exchange air box is lower than the room temperature.

The invention relates to an energy efficiency optimization method for a dynamic load of a central air conditioner, which comprises the following steps of: establishing a response relationship among a cold and heat source, a transmission and distribution system and end equipment, identifying a nonlinear decoupling characteristic of a cold and heat response behavior by monitoring operation deflection of each level of equipment under a low-load working condition, and defining and updating a cooling capacity response deviation threshold in real time; on the basis of the cooling capacity response deviation threshold, delay compression control is conducted on response actions of the refrigerant side and the air medium side, and by adjusting the air side response time sequence in advance, dynamic thermodynamic equilibrium is formed between refrigerant transfer delay and air medium response in advance; by establishing the response relationship among the cold and heat source, the transmission and distribution system and the end equipment and introducing a cold capacity response deviation threshold dynamic updating mechanism, nonlinear coupling mismatch in a cold and heat transmission chain can be accurately identified, so that the system is more flexible to operate under low-load and variable-load conditions, frequent start and stop or redundant operation of the cold and heat source is avoided, and the system reliability is improved. And therefore, the overall COP value of the system is remarkably increased, and unit cooling capacity consumption is reduced.

The invention discloses a defrosting control method and device and a heat pump system.The method comprises the steps that S1, a first operation parameter is detected in a defrosting mode, whether a first defrosting condition is met or not is judged, if yes, the defrosting mode continues to be operated, and if not, a heating mode continues to be operated; and S2, in the heating mode, detecting a second operation parameter and whether the second operation parameter meets a second defrosting condition or not, if yes, operating the defrosting mode and returning to the step S1, counting the number of times that the first defrosting condition is not met, and if the number of times that the first defrosting condition is not met exceeds a first preset number of times, controlling the heat pump system to stop and sending out a fault prompt. Whether the heat pump system is abnormal or not is preliminarily judged by detecting the water inlet and outlet temperature difference and the refrigerant inlet and outlet temperature difference of the water side heat exchanger in the defrosting mode, and then the abnormal condition of the heat pump system is further confirmed by combining the water inlet and outlet temperature difference of the water side heat exchanger during operation of the heating mode, so that the abnormal condition can be found in time, defrosting is stopped, and the heating efficiency is improved. And icing or damage of the water side heat exchanger is reduced.

The invention relates to the technical field of automatic control, in particular to a low-temperature control system of a centrifugal variable-frequency magnetic suspension water chilling unit, which comprises an environment heat parameter detection module, a condensation pressure deviation identification module, a condensate water flow rate regulation and control module, a refrigerant flow evaporation linkage module and an energy consumption curve dynamic construction module. According to the method, the inlet and outlet water temperature of the condenser and the external air temperature are collected, and synchronous filing and water temperature difference rate normalization processing are combined, so that when the external temperature changes drastically, the abnormal trend of water temperature change lag can be captured in time, and the condensation instability risk is pre-judged in advance; based on local pressure change rate gradient density analysis, abnormal fluctuation of condensation pressure is precisely discriminated, the problem that the local instability risk is covered by a global mean value is avoided, and the early warning timeliness is improved; the flow speed of condensate water is dynamically adjusted according to condensation instability characteristics, PID dynamic correction is conducted by extracting the rotating speed and flow speed error of a water pump, it is ensured that the heat exchange performance of a condenser continuously meets the low-temperature change requirement, and the condensation pressure stability is remarkably improved.

The utility model discloses a novel efficient energy storage air cooling air conditioning system which comprises a compressor, a three-phase heat exchanger I, a three-phase heat exchanger II, an outer fan, an inner fan, a capillary tube, a water pump, an expansion kettle, a drying tank and an air bellow. A first cavity and a second cavity which are independent are formed in the air bellow, an inner fan and a three-phase heat exchanger II are arranged in the first cavity, and an outer fan and a three-phase heat exchanger I are arranged in the first cavity; on the basis, a refrigerant circulation system and a cooling water circulation system are constructed. According to the air cooling system, the refrigerant circulation system or the cooling water circulation system can be selected to work in time according to the temperature of the external environment and the return air temperature of the air bellow, so that the heat dissipation requirement of the air cooling system under the condition that the environment temperature is high can be met, and meanwhile the use frequency of the compressor is reduced when the environment temperature is low; power consumption is reduced and system efficiency is improved.

The invention relates to the technical field of air conditioners, particularly provides an air conditioning system and a control method thereof, and aims to solve the problems that condensation is easily generated and the temperature is too high to facilitate heat dissipation in an existing refrigerant heat dissipation mode. In order to achieve the purpose, the air conditioning system comprises an outdoor heat exchanger, a control valve, a refrigerant radiator, a throttling element and an indoor heat exchanger which are sequentially connected. The refrigerant radiator is used for radiating a driving module of the air conditioning system; the air conditioning system further comprises a first temperature detection piece which is arranged on the side, close to the control valve, of the refrigerant radiator and used for detecting the temperature of the refrigerant flowing to the refrigerant radiator or flowing out of the refrigerant radiator. The opening degree of the control valve is adjusted in the refrigeration mode, the opening degree of the throttling element is adjusted in the heating mode, and the temperature of the throttling element and the control valve is controlled in the defrosting mode, so that the temperature is higher than the dew point temperature and lower than the temperature of the driving module; therefore, the driving module can be cooled, and condensation can be avoided.

The present application provides a two-phase cold plate liquid cooling system and a control method. According to the present application, for parts which are cooled in series by the two-phase cold plate liquid cooling system, after a first evaporator cools a previous part, on the basis of the heat transfer requirements of a part cooled by a second evaporator, the quality of a refrigerant output from the first evaporator is adjusted to prevent the quality of the refrigerant from being too low or too high, and thus the refrigerant entering the second evaporator has proper quality, namely, the refrigerant entering the second evaporator has proper boiling point and heat exchange capacity, so that corresponding parts can be cooled to proper temperature, and large temperature difference between upstream and downstream parts is avoided. The solution solves the problem of the temperature of downstream parts in the series being lower than the temperature of upstream parts in the series, improves the temperature uniformity of multiple parts cooled in series, and then solves the problems of pressure oscillation, circulation stagnation and circulation reverse flow in the system, greatly improving the temperature uniformity of heat sources connected in series and the reliability of a series-parallel system.

The utility model provides a heat exchanger assembly and an air conditioner, the heat exchanger assembly comprises an evaporator assembly and a surface air cooler assembly, refrigerant is introduced into a heat exchange tube of the evaporator assembly, chilled water is introduced into a heat exchange tube of the surface air cooler assembly, and the evaporator assembly and the surface air cooler assembly are connected into a whole. The evaporator assembly is located at the upstream position of the surface air cooler assembly in the air flowing direction, when chilled water is mainly used for refrigeration, the surface air cooler assembly works, the evaporator assembly does not work, and air passes through the evaporator assembly to be not cooled and then passes through the surface air cooler assembly to be cooled. According to the utility model, the refrigeration effect is not worsened under the condition that the energy efficiency and the refrigeration performance are considered at the same time, and the required refrigeration effect is ensured.

The invention provides a system and method for improving the ability of activated carbon to adsorb medium and low temperature VOCs waste gas, and the system comprises: a heat exchanger for introducing steam heat of the medium and low temperature VOCs waste gas to perform waste heat recovery to generate high temperature circulating water; the refrigerating system is used for receiving the high-temperature circulating water through a pipeline and recovering heat of the high-temperature circulating water to enable the refrigerating system to generate a refrigerant, and the refrigerant enters the heat exchanger to exchange heat with the medium-low-temperature VOCs waste gas; the activated carbon fixed bed adsorption device is used for receiving the medium and low temperature VOCs waste gas after heat exchange and adsorbing organic gas in the waste gas; the steam thermal desorption device is used for introducing steam into the activated carbon fixed bed adsorption device for desorption after the activated carbon fixed bed adsorption device is saturated in adsorption, and the steam takes away the organic gas adsorbed by the activated carbon fixed bed adsorption device and enters a downstream phase change heat exchanger; and the phase change heat exchanger is used for recycling steam heat after analysis by using circulating water to generate high-temperature circulating water, and after heat is recycled, waste gas is condensed, so that organic gas is dissolved in water to form an organic solvent to be recycled.

The utility model discloses an air conditioning system matched with a cryogenic liquid gasification process. The air conditioning system comprises a first gasifier, a liquid outlet pipe, an air supply pipe, a cooling liquid supply pipe, a cooling liquid return pipe, a heat exchanger, a fan, a controller, an environment temperature sensor, a circulating liquid inlet pipe, a circulating liquid outlet pipe, a cooling liquid supply source, a cooling liquid temperature sensor and a circulating pump. The air conditioning system can utilize cold energy generated by gasification of cryogenic liquid to refrigerate, is particularly suitable for cryogenic liquid tank trucks using the cryogenic liquid as power fuel, can replace a traditional vehicle-mounted air conditioner to refrigerate, can also realize a heating function, eliminates a high-power-consumption part, namely a compressor, necessary for conventional vapor compression refrigeration cycle, and is energy-saving and environment-friendly. Therefore, the energy consumption can be greatly reduced, and considerable energy-saving and emission-reducing benefits are brought; and only cooling liquid is used as a refrigerant medium for transferring cold energy, the functions of cooling, heating and cryogenic liquid gasification of the air conditioner can be achieved only through one medium, the structure is simple, and the cost is low.

The utility model discloses a multi-system water chilling unit which comprises at least two heat exchange systems, at least two waterway systems and a combined heat exchanger, and the heat exchange systems can be combined to form or respectively form an independent heat exchange circulation loop by switching the serial or parallel connection state and the opening or closing state of the combined heat exchanger; the water path system can be combined to form or respectively form an independent water circulation loop, so that the heating or refrigerating capacity of the unit is obviously increased; different heat exchange circulation loops are switched and controlled by adjusting refrigerant flowing paths between the multiple heat exchange systems and the combined heat exchanger, and different water circulation loops are switched and controlled by adjusting water medium flowing paths of the multiple water path systems. Therefore, after the water chilling unit is installed, different operation modes can be selected and switched according to different heat or cooling capacity requirements, hot water or cold water with the corresponding capacity and temperature is produced, the heating or cooling capacity of the unit is matched with the actual requirement, the whole equipment or part of elements do not need to be replaced, cost is low, and maintenance is convenient.

The invention provides a heat pump unit, an air conditioner and a control method. When the heat pump unit is in a refrigeration mode, the outdoor wet-bulb temperature is larger than or equal to a wet-bulb temperature threshold value, and the outdoor dry-bulb temperature is larger than a dry-bulb temperature threshold value, the series flow path and the first bypass flow path are both in a conducting state. In other words, part of the refrigerant is adopted for heat exchange through a series flow path which is formed by connecting the air-cooled condenser in series and then connecting the evaporation cold condenser in series, and the other part of the refrigerant is synchronously adopted to cross the air-cooled condenser and directly enter the evaporation cold condenser for heat exchange, so that the evaporation cold condenser can participate in heat exchange more sufficiently; the energy efficiency of the whole heat pump unit is improved, and the refrigeration use experience of a user is improved.

The air conditioner comprises a refrigerant circulation loop, an indoor fan, an indoor environment temperature sensor, a coil pipe temperature sensor and a controller, and the controller is configured to determine a first expected surface temperature corresponding to the air conditioner based on the indoor environment temperature and preset humidity when a first preset condition is met, the first preset condition comprises that in the refrigeration mode or the dehumidification mode, the indoor environment temperature does not exceed the sum value of the set temperature and the first preset temperature difference value; and the operation state of the indoor fan is controlled based on the first difference value between the indoor coil pipe temperature and the first expected surface temperature or the frequency of the compressor, so that the stability of the indoor temperature is guaranteed under the condition that condensate water on the surface of the indoor heat exchanger is kept non-volatile. The problem that the user comfort and peculiar smell control are contradictory in the air supply stage of a traditional air conditioner is solved, and the user comfort is improved.

The utility model provides an air conditioner and hot water all-in-one machine with temperature control and dehumidification functions, which comprises a compressor, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a refrigerant-water heat exchanger and a liquid storage device, and the exhaust end of the compressor is communicated to one end of the outdoor heat exchanger, one end of the first indoor heat exchanger or one end of the refrigerant-water heat exchanger. One end of the second indoor heat exchanger communicates with the exhaust end or the air suction end of the compressor, the other end of the second indoor heat exchanger communicates with the liquid storage device, and the other end of the outdoor heat exchanger, the other end of the first indoor heat exchanger or the other end of the refrigerant-water heat exchanger communicates with the interior of the liquid storage device. The suction end of the compressor communicates with one end of the outdoor heat exchanger or one end of the first indoor heat exchanger. According to the utility model, the modes of refrigeration and water heating, heating and water heating and dehumidification and water heating can be realized at the same time, the system can also adapt to the refrigerant circulation amount in different modes, the problem of high power consumption is solved, the problem that the requirement of comfort cannot be met is solved, and the system runs efficiently.

The invention provides a control method of an air conditioner heat recovery system, the air conditioner heat recovery system and a computer readable storage medium. The method comprises the steps that the water temperature of a water heater and the indoor environment temperature at the current moment are obtained; according to the water temperature of the water heater and the indoor environment temperature, the operation mode of the air conditioner heat recovery system is determined, and the first operation mode is a mode that the air conditioner is in a refrigeration mode and does not heat the water heater; the second operation mode is a mode in which the air conditioner is in a refrigeration mode and heat released by a refrigerant of the air conditioner is completely used for heating the water heater, and the third operation mode is a mode in which the air conditioner is in the refrigeration mode and part of heat released by the refrigerant of the air conditioner is used for heating the water heater; and controlling the air conditioner heat recovery system to operate in the operation mode. According to the method, through switching of multiple operation modes of the system, condensation heat can be recovered to reserve domestic hot water in advance while intelligent regulation and control of the indoor temperature are achieved, and effective utilization of heat energy of the whole house is achieved.

The invention relates to the technical field of air conditioners, in particular to a liquid separator, a heat exchange device and a heat pump unit, the liquid separator comprises an outer pipe body, an inner pipe body and a branch pipe body, the outer pipe body is arranged on the outer side of the inner pipe body in a sleeving mode, the outer pipe body and the inner pipe body are connected to define a liquid separation cavity, and at least one partition plate is arranged in the outer pipe body; the liquid separation cavity is at least divided into two cavities through a partition plate in the flowing direction of refrigerants in the liquid separation cavity, the partition plate is provided with a flow guide channel, every two adjacent cavities are communicated through the flow guide channel, the branch pipe body is arranged on the outer pipe body, when the liquid separator is applied to a condensation state, the branch pipe body comprises first branch pipes and second branch pipes, each cavity is communicated with at least one first branch pipe, and each second branch pipe is communicated with at least one second branch pipe. The first branch pipe is suitable for inputting refrigerants into the cavities, except the cavity communicated with the outlet of the inner pipe body, the other cavities are all communicated with at least one second branch pipe, and the second branch pipes are suitable for outputting the refrigerants from the cavities. Gas-liquid separation in the condensation process is achieved, the purpose of improving the condensation effect of the heat exchanger is achieved, and the performance of the heat exchanger is exerted to the maximum.

The invention discloses a vehicle thermal management system and a vehicle with the same. The vehicle thermal management system comprises a compressor; the air conditioner subsystem comprises an in-vehicle heat exchanger and a first refrigerant flow path, and the first refrigerant flow path is connected with the compressor and the in-vehicle heat exchanger; and the refrigerator subsystem comprises a first heat exchanger used for adjusting the temperature of the refrigerator, and a heat exchange medium in the refrigerator subsystem is suitable for heat exchange with a refrigerant in the first refrigerant flow path. According to the vehicle heat management system, the refrigerant in the compressor and the air conditioner subsystem does not directly participate in refrigeration or heating of the first heat exchanger, heat exchange is conducted between the refrigerant and the heat exchange medium in the refrigerator subsystem, refrigeration or heating of the first heat exchanger is achieved through the heat exchange medium, then refrigeration or heating of a refrigerator is achieved, and the heat exchange efficiency of the refrigerator is improved. In this way, when the refrigerator subsystem and the air conditioner subsystem share the compressor, the refrigerant can be used for refrigerating or heating other systems.

The present invention relates to a secondary cross-flow high-efficiency waste heat recovery heat exchanger, which belongs to the field of heat exchangers. The heat exchanger includes a housing, the periphery of which is provided with a plurality of flange openings. The housing is divided into a first chamber and a second chamber by a profile. A hot medium inlet is provided on the left side of the first chamber, and a cold medium outlet is provided on the front side of the first chamber; a cold medium inlet is provided on the front side of the second chamber, and a hot medium outlet is provided on the right side of the second chamber; wherein the U-shaped circulation path of the cold medium intersects the circulation path of the hot medium. The present invention transforms the heat exchange form of the heat exchanger from the original cross-flow to a combination of cross-flow and counter-flow, greatly improving the value of the temperature difference correction and ultimately improving the heat exchange efficiency of the product. In addition, the pipeline layout is relatively compact and occupies little space.

The invention discloses a liquid cooling system, a liquid cooling system control method and electronic equipment, and relates to the technical field of equipment heat dissipation. According to the invention, the double-phase cooling medium with low conductivity is adopted, so that leakage and conduction of the cooling medium are avoided; the power supply module is contained in the shell, and the power supply module is cooled through sensible heat of the two-phase cooling medium, so that the two-phase cooling medium is converted into a saturated liquid state after absorbing heat; the cold plate assembly is attached to the power consumption module of the electronic equipment to be cooled, heat dissipated by the power consumption module is transferred to the flowing biphase cooling medium in the saturated state, the biphase cooling medium is subjected to phase change, and the power consumption module is cooled through biphase latent heat of vaporization with the highest heat exchange efficiency. Therefore, according to the scheme, the heat dissipation characteristics of all the components and the absorption potential of the two-phase cooling medium are combined, the heat dissipation requirements of the power supply module and the high-power power consumption module are considered, the problem that the heat dissipation capacity of the system cannot meet the heat dissipation requirement is solved, the heat dissipation efficiency is high, and the effect is good.

The invention discloses a refrigerant distribution method of a heat pump system, the heat pump system and a heat pump unit, the heat pump system comprises a compressor and three heat exchangers, the compressor can be connected with any two heat exchangers to form a refrigerant circulation loop, and the remaining heat exchanger serves as an idle heat exchanger for temporarily storing a refrigerant; the refrigerant distribution method comprises the steps that the current operation mode of the heat pump system is obtained, and the current system load Qload and the evaporator heat transfer requirement of a refrigerant circulation loop are estimated according to the deviation between the actual user side temperature and the set user side temperature; and comparing the current system load Qload with the heat transfer demand of the evaporator, and controlling the idle heat exchanger to access or exit from the refrigerant circulation loop according to the comparison result and the current operation mode so as to adjust the amount of refrigerant participating in circulation in the refrigerant circulation loop and the heat exchange area. By dynamically monitoring the current operation mode and the operation parameters, it is ensured that the refrigerant amount can be efficiently distributed after the operation mode is switched, and the operation efficiency and stability of the system are improved.

The invention is applicable to the technical field of electric vehicle thermal management, and provides an electric vehicle collaborative thermal management system based on a cross-refrigerant compatible framework, which comprises a refrigerant loop, a passenger compartment thermal management system, a power battery thermal management system, an electric drive thermal management system and a radiator, the passenger compartment thermal management system, the power battery thermal management system, the electric drive thermal management system and the radiator are communicated in different modes through a nine-way water valve. A cross-refrigerant compatibility module unit is integrated into a passenger compartment heat management module, three integration schemes are provided, the communication modes of nine-way water valves in all modes are kept consistent, meanwhile, series connection of a cold air core body and a warm air core body in a passenger compartment heat management loop is achieved, and the performance of a heat management system under the extreme working conditions in summer is improved. The system architecture can be compatible with an R134a platform and an R290 platform, and serves as a novel heat management system capable of conveniently switching different refrigerant platforms.

The utility model provides a purification treatment device, and relates to the technical field of process water treatment. The purification treatment device comprises: a first cation exchange resin tank for adsorbing and extracting at least a part of oligomers and cations in water; a water inlet of a heating medium channel of the first heat exchanger is connected with a water outlet of the first cation exchange resin tank, and the first heat exchanger is used for cooling the entered extraction water; a water inlet of a heating medium channel of the second heat exchanger is connected with a water outlet of a heating medium channel of the first heat exchanger so as to cool the extraction water, so that the temperature of the extraction water flowing out of the heating medium channel of the second heat exchanger is lower than or equal to a first threshold value; the anion exchange resin tank is connected with a water outlet of the heating medium channel of the second heat exchanger; the second cation exchange resin tank is connected with the water outlet of the anion exchange resin tank; and the water outlet of the second cation exchange resin tank is connected with the water inlet of the refrigerant channel of the first heat exchanger. According to the invention, impurities in the extracted water can be removed.

The invention relates to the technical field of ocean engineering, in particular to a test method suitable for an ORC system performance test. The method comprises the following steps that a heat medium boiler, an air cooling tower and an ORC system are connected, a heat source pipeline and a cold source pipeline are established, and temperature parameters are set; the air cooling tower is started to exhaust air and exchange heat with refrigerant water, organic working medium condensation is accelerated, and it is guaranteed that the cooling efficiency reaches the standard; electrical, instrument, logic and safety protection tests are completed; the system is started and continuously operates for 120 minutes, and whether the temperature, the electrical parameters and the mechanical state are normal or not is monitored in real time; a dry type load device is connected to simulate power generation, and the output performance and stability of the ORC system under the load are verified; and closing the equipment and recovering the original pipeline, and simulating all actions before the ORC system is started. Coolant water and an air cooling tower are used for forced ventilation and cooperative heat exchange, and working medium condensation is accelerated. A cable health degree model is introduced, the cable insulation performance is dynamically evaluated by combining parameters such as temperature and load fluctuation, and the test logic is optimized.

The invention relates to the technical field of tail gas treatment, and discloses a dragon kiln tail gas waste heat recovery device which is characterized in that a dragon kiln flue is designed to be Z-shaped, and a Z-shaped heat exchange plate is additionally arranged in the dragon kiln flue, so that after being sucked into a heat exchange cavity of the dragon kiln flue by a guide fan, high-temperature tail gas is influenced by a turning point of the Z-shaped heat exchange plate and is impacted and rotationally decelerated; meanwhile, in the process of guiding a fan to rotate, an eccentric block is driven to synchronously rotate, so that different point positions on the same circumference on the inclined surface of the eccentric block are in contact with a contact ball, and a spring III is matched to drive a straight moving pipe to do straight reciprocating motion, so that the straight moving pipe drives a heat exchange plate I to synchronously move; the heat exchange plate I drives the heat exchange plate II to perform inclined reciprocating motion, and the heat exchange plate II drives the heat exchange plate III to perform inclined reciprocating motion, so that cold medium turbulence in the heat exchange plates is intensified, and in the reciprocating motion process of the heat exchange plates, the contact amount between the heat exchange plates and high-temperature tail gas in unit time is increased.

The invention relates to the technical field of sample storage, particularly provides a cascade refrigeration system and a control method of an ultralow-temperature sample library, and aims to solve the problem that normal operation of a unit is affected due to abnormal oil return of an existing cascade refrigeration system. In order to achieve the purpose, the cascade refrigeration system comprises a high-temperature-stage refrigeration unit, a low-temperature-stage refrigeration unit and an intermediate heat exchanger, the low-temperature-stage refrigeration unit comprises a low-temperature compressor, an oil separation device and a heat exchange device, the oil separation device comprises a plurality of oil separators arranged in sequence, and a heat exchanger is arranged between every two adjacent oil separators; the low-temperature compressor, the oil separation device, the intermediate heat exchanger and the heat exchange device are communicated with one another to form a low-temperature-stage refrigerant circulation loop, and the high-temperature-stage refrigeration unit and the intermediate heat exchanger are communicated with one another to form a high-temperature-stage refrigerant circulation loop. The oil separation efficiency can be improved, deep oil removal is achieved, and oil return is remarkably improved.

According to the refrigeration extractor hood system and the control method thereof, a first three-way valve and a first temperature sensor for detecting the temperature of an exhaust pipe are installed on the exhaust pipe of a refrigeration system, a first heat exchange pipe is installed on the volute annular wall of an oil smoke suction fan, and a first port of the first three-way valve communicates with an outlet of a compressor; a second port of the first three-way valve is communicated with an inlet of the condenser, a third port of the first three-way valve is communicated with an inlet of the first heat exchange pipe, an outlet of the first heat exchange pipe is communicated with an inlet of the condenser, and the controller receives output signals of the first temperature sensor and correspondingly controls the first three-way valve. The controller of the system adjusts the guiding of the three-way valve according to the temperature of the exhaust pipe, and adjusts the amount of refrigerant entering the first heat exchanger on the volute annular wall, so that the temperature of the volute annular wall reaches a grease melting point, grease can smoothly flow into an oil cup, and the volute is self-cleaned. In addition, an oil fume suction fan is used for conducting auxiliary heat dissipation on the heat dissipation module, and oil fume is subjected to grease separation by means of the cooling capacity of the refrigerating system.