463 results about "Refrigeration temperature" patented technology

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.

The invention relates to the technical field of refrigeration control, in particular to a medical refrigerator compressor refrigeration temperature control system and method based on big data, and the system comprises a storage article recognition module, a heat capacity calculation module, a compressor load adjustment module, a refrigerant flow control module and a compressor performance correction module. According to the medical refrigerator, the types and characteristics of stored articles are precisely recognized, detailed parameters are extracted, the high-precision temperature sensor and the environment parameter set are utilized, and dynamic calculation is conducted on the refrigeration requirement, so that precise adjustment of the output power of the compressor is achieved, and the temperature stability and the medicine quality in the medical refrigerator are ensured; by refining the storage requirement of each medicine, optimizing the refrigerant supply amount and achieving a more accurate temperature control strategy, and by correcting the performance parameters of the compressor and improving the overall energy efficiency and reliability, energy waste can be more effectively reduced, optimization of storage conditions is ensured, and the overall efficiency and response speed of a refrigeration system are remarkably improved.

The invention discloses welding equipment for production of a refrigeration temperature controller of a refrigeration house, and relates to the technical field of welding equipment.The welding equipment comprises a cabinet and a machining mechanism, the machining mechanism comprises a connecting sliding block and an air cylinder, a hydraulic cylinder is installed on the side of the outer side of the connecting sliding block, and a welding main machine is fixedly installed at the telescopic end of the hydraulic cylinder; a welding gun is installed at the bottom of the welding main machine, a heat preservation assembly is installed on the outer side, close to the bottom, of the welding gun and comprises an annular sliding part, a cylinder is fixedly installed on the edge side of the outer side of the annular sliding part, and a reset spring is fixedly installed between the top of the cylinder and the conical face of the top of the outer side of the welding gun. A heat conducting piece is fixedly installed on the side of the inner cavity of the cylinder and close to the edge of the annular sliding piece, and a clamping piece is fixedly installed on the outer circle face of the cylinder and close to the bottom through a connecting rod. According to the welding equipment for production of the refrigeration temperature controller of the refrigeration house, the heat preservation effect is achieved, heat preservation can be conducted, the situation that the temperature difference is too large is not likely to occur, and the welding quality is high.

The invention relates to the technical field of semiconductor refrigerators, and discloses a vehicle-mounted semiconductor refrigerator which comprises a shell and a drawer box, and the shell comprises an inner shell and an outer shell; a semiconductor refrigeration assembly and a central control assembly are installed on the shell, a lower air duct and a rear air duct are arranged on the shell, the lower air duct communicates with the rear air duct, and an air outlet is formed in the upper portion of the front side of the shell and communicates with the rear air duct; a return air inlet is formed in the lower part of the rear side and communicated with the lower air duct; an inner fan is installed at the air return opening of the shell, and a plurality of air circulation holes are formed in the two sides of the storage drawer. The return air inlet is formed in the lower portion of the rear side of the refrigerator, the air outlet is formed in the upper portion of the front side of the refrigerator, and meanwhile the air circulation holes are formed in the two sides of the storage drawer, so that the problems of uneven refrigeration temperature, low temperature at the air inlet and high temperature away from the air inlet in an existing design in the market are solved, and the effects of higher cooling rate and higher cooling efficiency are achieved. And the cooling effect in the refrigerator is more uniform.

The invention provides a dilution refrigeration system not limited by gravity, and relates to the field of extremely-low-temperature dilution refrigeration. The dilution refrigeration system not limited by gravity comprises a first-stage pre-cooling device, a second-stage pre-cooling device, a capillary type dilution refrigeration device, a liquid pool circulating device, a dilution recovery device and a dilution air inlet device, wherein the first-stage pre-cooling device comprises a vacuum cover, a GM pulse tube refrigerator, a 40K-stage heat exchanger, a 40K-stage cold shield, a transition heat exchanger and a 4K-stage heat exchanger. Compared with a conventional dilution refrigeration system, the dilution refrigeration system not limited by gravity has the advantages that due to the fact that the multistage capillary tube heat exchanger is adopted, surface tension can be used for replacing gravity to fix a concentrated phase interface and a dilute phase interface, and refrigeration temperature is directly transmitted to a hot end component in a capillary tube winding mode and the like; the interference of a zero-gravity or anti-gravity environment on the conventional dilution refrigeration process is avoided from the source, the influence of the vibration of the refrigeration unit on the hot end is favorably reduced, and part of high-precision application occasions with strict requirements on free installation and vibration interference is met.

The invention discloses a central air conditioner control method, system and device, a medium and a program product, and relates to the technical field of data processing and control systems.The method comprises the steps that a central air conditioner system control model is built; the method comprises the following steps: constructing an actor network, and embedding an optimization control model consisting of a global critic network and a local critic network of a GAT (Graphics Attention Transform); and training the optimization control model, and controlling the refrigeration temperature set value and the heating temperature set value of each area according to the current state observation variable of each area by using the trained actor network. A critic network is designed into a global critic network and a local critic network, the problem that regional thermal comfort awards and central air conditioning system total energy consumption awards conflict with each other in the training process is relieved, a graph attention network is fused into the global critic network, coupling information in the system is fully extracted, and the optimization control performance is improved.

The invention discloses a generator-condenser heat exchange coupled automatic cascade absorption type refrigeration cycle system. On the basis of an automatic cascade absorption refrigeration cycle, a non-azeotropic mixed refrigerant and an absorbent are adopted as working media. In the condenser, the mixed refrigerant can release a large amount of temperature slippage heat, the heat is effectively recycled by establishing a coupling heat exchange process between the generator and the condenser, the heating capacity of the generator in the system is reduced, and therefore the COP of circulation is improved. In addition, the system can adjust the refrigeration temperature by replacing the mixed refrigerant, the refrigeration temperature range can be from the room temperature to-100 DEG C or below, and the system has the advantage of being flexible in refrigeration temperature adjustment. Through reasonable arrangement of the generator-condenser coupling heat exchanger, the self-cascade absorption type refrigeration cycle configuration is optimized, the refrigeration efficiency is remarkably improved, the advantages of energy conservation and environmental protection are achieved, the wide refrigeration temperature adjusting range is provided, and the self-cascade absorption type refrigeration cycle system is suitable for various application scenes.

The invention discloses a precise temperature control ice cap, glove and shoe cover device, and relates to the technical field of medical equipment, the precise temperature control ice cap, glove and shoe cover device comprises an ice cap, a glove and a shoe cover, the outer side of the ice cap, the outer side of the glove and the outer side of the shoe cover are each provided with a refrigeration temperature control mechanism used for adjusting the use distance and being suitable for pre-hospital first aid, and each refrigeration temperature control mechanism comprises a refrigeration unit, the device is arranged on the outer sides of an ice cap, gloves and shoe covers and comprises a box body, the winding unit is arranged on the left side of the refrigeration unit and comprises a mounting frame fixedly mounted on the left side of the box body, and a winding disc is rotationally mounted in the mounting frame; the dismounting and mounting unit is arranged on the outer sides of the ice caps, the gloves and the shoe covers and used for facilitating dismounting of the ice caps, the gloves and the shoe covers, the driving motor operates, the driving motor drives the winding disc to rotate, the winding disc rotates to unwind the air conveying pipe, and therefore the distance of the air conveying pipe can be adjusted, and the distance between the patient and the device can be adjusted.

The invention relates to a control method of refrigeration equipment, the refrigeration equipment and a refrigerator and relates to the technical field of refrigeration, and the method comprises the steps that under the condition that the temperature of an object in the refrigeration equipment is smaller than a preset temperature, the cooling speed change rate of the object is determined; under the condition that the cooling speed change rate is smaller than a preset value, the freezing temperature of the article is obtained according to the target cooling speed of the article; and the refrigeration temperature in the refrigeration equipment is adjusted to be higher than the freezing temperature. By means of the control method of the refrigeration equipment, the refrigeration equipment and the refrigerator, the freezing temperatures of different objects can be obtained, the refrigeration temperature is adjusted to be higher than the freezing temperature, and the object freezing probability is reduced.

The invention provides a liquid cooling control method, electronic equipment and a storage medium. The liquid cooling control method comprises the following steps: acquiring a current operation mode of a liquid cooling device of the energy storage system; when the current operation mode is the refrigeration mode, the highest battery temperature and the average battery temperature in the energy storage system are obtained; and if the highest temperature of the battery is greater than or equal to a preset first refrigeration temperature threshold value and the average temperature of the battery is greater than or equal to a preset first average temperature threshold value, reducing a target liquid cooling temperature of a refrigeration mode, so that the liquid cooling device performs refrigeration according to the reduced target liquid cooling temperature. When the current operation mode of the liquid cooling device is the refrigeration mode, if the maximum temperature of the battery and the average temperature of the battery are relatively high, the target liquid cooling temperature of the liquid cooling device is further reduced to enhance the refrigeration effect, so that the battery can be better maintained in a relatively good operation temperature interval, and the service life of the battery is prolonged. Therefore, the service life of the battery and the overall efficiency and economic benefits of the energy storage system are improved.

The present invention relates to the field of intelligent meat preservation equipment, and provides a movable assembled meat non-crystallization frozen intelligent preservation rack. It includes a main frame and a control system. The main frame is provided with a storage space with adjustable layer spacing and stackable turnover boxes. The back panel of the rack frame is integrated with a touch-type power interface, a multi-point temperature sensor and a control system; a porous composite electrode plate is arranged opposite the side panels on both sides of the rack to generate a controllable electric field; the control system is arranged on the back panel of the rack, and by inputting meat raw material information and ambient temperature, the control system decides and outputs non-crystallization frozen storage and abnormal ice early warning ablation electric field parameters, and the electrode plate space forms a multi-mode feedback matching electric field to inhibit ice nucleus formation. The non-crystallization frozen intelligent preservation rack provided by the invention can be flexibly connected in parallel, and is suitable for different preservation needs of multiple raw materials and multiple scenes, breaking the boundaries of traditional freezing and refrigeration temperature zones, and realizing intelligent preservation of frozen quality and cold storage.

The invention relates to the technical field of glycerin distillation, in particular to a glycerin distillation device with a heat energy recycling function. The device comprises a distillation tower, a condenser, a reflux tank and a compression mechanism connected with the reflux tank, wherein one side of the distillation tower is communicated with a feed pipe, and the top of the distillation tower is communicated with a steam discharge pipe connected with the condenser; one side of the distillation tower is communicated with a reboiler; the condenser has a normal refrigeration temperature and an energy-saving refrigeration temperature, and in the glycerin distillation device with the heat energy recycling function, a part of liquid phase is guided into the distillation tower and then is matched with a gas phase which is not condensed by the condensation tank, so that the gas phase which is not condensed by the condensation tank is pressurized and then is condensed by the condensation tank; according to the utility model, the gas phase inside the distillation tower is guided to the liquid phase, and the liquid phase is scattered by utilizing the blade fan, so that the gas phase is in uniform contact with the liquid phase, and therefore, the gas phase is guided into the distillation tower, the efficient separation of glycerol is also realized, and the product quality is improved.

The invention discloses a temperature-adjustable analgesic method for cooling dorsal root ganglion, which is characterized in that according to the characteristics of complicated anatomical structure and extremely small size of the dorsal root ganglion, a miniature thermoelectric refrigeration device which is small in size, capable of being embedded in vivo, high in biocompatibility, wide in refrigeration range and capable of being stably fixed is designed. Meanwhile, the device has the characteristics of capability of quantitatively regulating and controlling the refrigerating temperature, no external refrigerating cycle, low cost and the like; besides, under the condition that the nerve structure is not damaged, the device can effectively slow down inherent nerve activity and inhibit abnormal discharge of neurons, so that the device is used for gently cooling and regulating DRG to relieve chronic pain. The invention not only opens up a brand-new treatment way for chronic pain patients who have been addicted or tolerated to drugs, but also is expected to be expanded to the field of pain management of animals such as pets and racing horses.

The invention relates to the technical field of refrigeration, and provides an elastic heat refrigerating system which comprises a rack, a heat exchanger, a heat exchanger and a heat exchanger. The clamp comprises two clamping heads arranged in the second direction and used for clamping the two sides, in the second direction, of the elastic heat material correspondingly, and the second direction is perpendicular to the first direction. The clamp can move in a reciprocating mode in the first direction, and the two clamping heads can move in the opposite direction or in the opposite direction in the second direction. The driving device is used for providing driving in a first direction; and the movement mechanism is used for decomposing the driving of the driving device towards the heat sink into the movement of the clamp towards the heat sink and the backward movement of the two clamping heads, and decomposing the driving of the driving device towards the heat source into the movement of the clamp towards the heat source and the opposite movement of the two clamping heads. According to the arrangement, only one power source is used, tensile deformation and position movement of the elastic heat material can be achieved at the same time, space is saved, and meanwhile the performance of the elastic heat material is fully utilized to complete refrigeration under the large refrigeration temperature span.

The utility model discloses a dual-system evaporator for a vehicle, and belongs to the technical field of evaporators for refrigeration vehicles. The evaporator mainly comprises an evaporator shell, the two ends of the evaporator shell are fixedly connected with side fixing plates respectively, a plurality of sets of heat exchange coils are arranged in the evaporator shell, a plurality of pipeline supporting plates used for supporting and fixing the heat exchange coils are fixedly connected in the evaporator shell, and each set of heat exchange coils comprises a first coil and a second coil which are arranged in a staggered mode. The two ends of the first coil pipe and the two ends of the second coil pipe penetrate through the side fixing plates. The two sets of heat exchange channels which operate independently are additionally arranged in the evaporator and are arranged in the crossed mode, the crossed heat exchange channels enable the temperature distribution of the evaporator to be more uniform, and even if one set of heat exchange channels cannot work normally, the other set of heat exchange channels can still effectively maintain the refrigeration temperature. The utility model is mainly used for refrigeration of the refrigeration semitrailer.

The invention relates to a quality change prediction method and system for refrigerated drugs in cold chain transportation, and relates to the technical field of drug cold chain transportation, and the method comprises the steps: obtaining a refrigeration reference temperature interval and a refrigeration temperature fluctuation threshold value; during cold chain transportation, cold storage temperature time sequence information is collected; performing statistics on first-class refrigeration temperature time sequence information, second-class refrigeration temperature time sequence information, third-class refrigeration temperature time sequence information and fourth-class refrigeration temperature time sequence information; and processing is carried out through the medicine abnormity bipartite model of the refrigerated medicine model, and a medicine quality bipartite identifier is obtained and set as a quality prediction identifier of the refrigerated medicine model. The technical problem that in the prior art, due to the fact that full inspection is generally conducted after transportation is finished, tracking of the medicine quality cannot be achieved in the transportation process, and the efficiency of medicine quality detection is low is solved.

The invention discloses a semiconductor cooler refrigeration performance evaluation method and system, and relates to the semiconductor refrigeration technology, and the method comprises the steps: building a TEC refrigeration model considering the Peltier effect, Joule heat, heat conduction and Thomson effect; solving the established TEC refrigeration model to obtain Seebeck coefficients, TEC average resistance and TEC average thermal conductivity under different hot surfaces; establishing a function mapping relation based on the Seebeck coefficients, the TEC average resistance and the TEC average thermal conductivity under different heat surfaces obtained by solving; and constructing a refrigerating capacity and refrigerating temperature equation according to the established function mapping relation to evaluate the TEC refrigerating effect. The TEC characteristic function relation changing along with the temperature can be established on the basis of a small amount of TEC measured data, and therefore the TEC refrigeration temperature, the refrigeration capacity, the control voltage, the control current and other performance data can be rapidly and accurately calculated.

The invention provides a variable temperature testing device for chip testing and a chip processing system, and relates to the technical field of chip detection. Comprising an intermediate measurement Dewar assembly, a fixing assembly and a refrigeration assembly. The intermediate measurement Dewar assembly comprises a thin-wall cold finger, a transition ring, a Dewar base and a Dewar window seat; the fixing assembly comprises a bottom plate; the connecting piece is arranged on the bottom plate, and a first height is formed between the connecting piece and the bottom plate; the supporting piece is arranged on the bottom plate, and a second height is formed between the supporting piece and the bottom plate; one end of the supporting piece is connected with the bottom plate, and the other end is in supporting connection with the Dewar window seat; the refrigerating assembly comprises a refrigerating machine which is arranged on the bottom plate and is in communication connection with an external control device; one end of the expansion machine is connected with the refrigerating machine, and the other end of the expansion machine is detachably connected with the other end of the thin-wall cold finger through a connecting piece; the refrigerator determines a refrigeration temperature of the expander. The variable temperature testing device provided by the invention has the characteristics of high temperature adjustment response rate, large adjustable temperature range and high temperature control precision.

The invention provides a safety monitoring method and device applied to a cable pipe gallery and a storage medium, and the method comprises the steps: controlling an inspection trolley to carry out the inspection of an area where a cable assembly is located, so as to obtain a surface temperature; judging whether a refrigerating system arranged in the internal space is operated or not according to the surface temperature; and if yes, the refrigerating temperature and the air outlet angle of the refrigerating system are adjusted according to the surface temperature and the indoor environment temperature of the inner space. The technical problems that a traditional cable temperature monitoring method mainly depends on manual inspection or a fixed temperature sensor, and manual inspection is low in efficiency, poor in real-time performance, difficult to cover all areas and the like are solved. A fixed temperature sensor has the defects of limited installation position, limited monitoring range, difficulty in flexible adjustment and the like. In addition, the internal environment of the cable pipe gallery is complex, the space is long and narrow, air circulation is not smooth, a local high-temperature area is easily formed, and a traditional temperature monitoring method is difficult to meet comprehensive and accurate monitoring requirements.

The utility model discloses a refrigeration equipment refrigeration effect detection device, comprising a support rod (4), one end of the support rod (4) is fixedly connected with a support block (7), the support block (7) is provided with a temperature detection element, at least one side of the support block (7) is rotatably connected with a rotating plate (10), the rotating plate (10) is provided with a plurality of through grooves, each through groove is rotatably provided with a fan blade for sensing wind power, and the fan blade is provided with a temperature detection element. Fan blade shafts of the fan blades are respectively provided with a rotation sensor. According to the utility model, the defect that the refrigeration temperature is detected by manually holding a thermometer is overcome, the air outlet force of the refrigeration equipment can be synchronously detected as required, and the practicability is good.

The invention discloses a self-driven electrocaloric refrigeration film and device based on a two-dimensional space confinement, belongs to the technical field of thermal management and solid-state refrigeration, and provides a film preparation method for improving electrocaloric effect cooling efficiency through a two-dimensional confinement template inducer and an action mechanism of the film preparation method. A two-dimensional confinement template inducer is adopted to guide an electrocaloric refrigeration polymer to adjust the molecular chain conformation on a two-dimensional plane under a spatial confinement condition; the discontinuous interaction formed by the porous structure of the two-dimensional confinement template inducer promotes the formation of a multi-site polar microstructure of the electrocaloric refrigeration polymer, increases the number of short-range polar domains of an electrocaloric refrigeration system and dipole entities responded by an electric field, and reduces the energy barrier in the phase change process under the driving of the electric field. The method is simple in preparation process, mild in reaction condition and low in cost, and the electrocaloric refrigeration device can achieve the refrigeration temperature of 5.4 K and electrodeformation of 2 mm in the vertical direction under the electric field of 70 MV / m. The invention provides a breakthrough innovative solution for the development of a new generation of efficient self-driven electric refrigeration devices.

The invention relates to the field of intelligent meat preservation equipment, and provides a meat non-crystallization frozen storage intelligent fresh-keeping warehouse, comprising a warehouse body, a storage rack and a control system, wherein a multi-point temperature sensor is installed in the warehouse body, and a refrigeration component is arranged in the warehouse body; the storage rack is horizontally arranged in the warehouse body, and a loading layer rack is arranged on the storage rack, and an alternating electric field generating device is embedded in the layer rack to generate a controllable electric field, and a temperature probe is installed on each layer of the storage rack; the control system comprises a meat raw material information input module, a non-crystallization frozen storage intelligent decision module, an abnormal icing warning ablation module, and a human-computer interaction interface, and the control system makes decisions and outputs non-crystallization frozen storage and abnormal icing warning ablation electric field parameters, and a controllable electric field with multi-mode feedback matching is formed in the plate space to inhibit the formation of ice nuclei; the meat non-crystallization frozen storage intelligent fresh-keeping warehouse provided by the invention breaks the boundary between traditional freezing and refrigeration temperature zones, avoids the quality deterioration of meat due to freezing, and realizes intelligent preservation of frozen quality and refrigeration.

The invention discloses a novel combined type heat exchange vehicle-mounted refrigerator and a control method, and relates to the technical field of vehicle-mounted refrigeration. The device comprises a box body, a novel composite heat exchange system and a control system, the novel combined type heat exchange system comprises a main refrigerating part, an energy storage part and a heat exchange part, wherein the main refrigerating part utilizes a cold source and a cold storage medium in the energy storage body to refrigerate or store cold; and the secondary refrigeration part comprises a semiconductor refrigeration piece. The cold end of the semiconductor refrigeration piece is coupled to the air flow path or the energy storage body of the system to provide supplementary or deep refrigeration, and the hot end of the semiconductor refrigeration piece dissipates heat through the heat dissipation structure. The heat dissipation structure is immersed in the cold storage medium, and heat of the hot end is absorbed through the cold storage medium. The main refrigeration part and the secondary refrigeration part are combined, heat management of the secondary refrigeration part is optimized, higher refrigeration capacity is achieved, and the requirement for lower refrigeration temperature can be met.

The invention discloses a magnetic field-ultrasonic-assisted laser polishing composite manufacturing method. The method comprises the following steps that S1, a workpiece to be machined is placed on a machining table top; s2, adjusting the direction of a magnetic field through movement of an electromagnet on a guide rail; s3, controlling a moving assembly to align the to-be-machined position of the workpiece to a laser; s4, the lifting assembly is controlled to drive the machining table top to ascend and descend, and the focus of the laser is aligned with the surface of the to-be-polished position of the workpiece; s5, the magnetic field intensity is set, the frequency and amplitude of an ultrasonic generation assembly are set, a machining path is set, and the refrigeration temperature of a refrigeration assembly is set; and S6, the electromagnet, the ultrasonic generation assembly, the moving assembly and the laser are started, the moving assembly drives the machining platform to move according to the machining path, and polishing machining is conducted. The invention provides a magnetic field-ultrasonic-assisted laser polishing composite manufacturing device. The surface quality and precision of the workpiece can be rapidly improved.

The present invention discloses an intelligent temperature control system and a temperature control method for seafood refrigeration, belonging to the technical field of refrigeration temperature control. Specifically, it includes: deploying multiple groups of gas sensing units inside the cold storage, constructing a dynamic pollution map by detecting the types and concentration distributions of decay characteristic gases; when any sensing unit detects that the concentration of the characteristic gas exceeds the primary threshold, starting the directional ventilation mode, and the discharged cold air flows through the heat exchange area to pre-cool the introduced fresh air; synchronously starting the humidity compensation system during the ventilation process; when three consecutive sensing units detect that the concentration exceeds the secondary threshold, triggering the pollution source tracking mode, and inversely deducing the core decay area based on the gas diffusion path; triggering an automatic removal instruction according to the positioning coordinates, and real-time monitoring the change of the gas concentration at the original cargo position during the removal process. If the concentration does not decay to the safety value after removal, triggering secondary tracking.

The invention provides a defrosting control method and device for judging full frost of a fin evaporator of a refrigerator. The defrosting control method comprises the steps that the environment temperature, the average temperature of an air return pipe, the door opening and closing frequency and the accumulated operation time of a compressor are collected to generate an initial frost control strategy; according to the environment temperature, the air return temperature and the refrigeration starting point temperature when the refrigerator is loaded are obtained; calculating a return air temperature difference value according to the return air pipe average temperature and the return air temperature; if the air return temperature difference value is larger than or equal to the first preset temperature value, an initial frost control strategy is executed; if the air return temperature difference value is smaller than the first preset temperature value and larger than or equal to the second preset temperature value, a first defrosting control strategy is executed; and if the return air temperature difference value is smaller than a second preset temperature value, the refrigeration sensor temperature is collected in real time through a refrigeration sensor temperature collection module to calculate a refrigeration temperature difference value, whether a second defrosting control strategy is executed or not is judged according to the refrigeration temperature difference value, and the problem that it is judged that the refrigerator fin evaporator is full of frost inaccurately is solved.

The invention discloses a control method of an air conditioner, and belongs to the technical field of air treatment. The air conditioner comprises a compressor, an outdoor heat exchanger, a first electronic expansion valve, a first indoor heat exchanger, a second electronic expansion valve and a second indoor heat exchanger. A fresh air outlet of the fresh air module can communicate with the indoor air return opening; when the air conditioner runs, fresh air flows through the second indoor heat exchanger and then flows through the first indoor heat exchanger from the indoor air return opening. The control method comprises the dehumidification step of controlling the opening degree of a second electronic expansion valve to adjust the refrigerating temperature of a second indoor heat exchanger so that fresh air can be cooled and dehumidified when flowing through the second indoor heat exchanger, and the dehumidification step of controlling the opening degree of a first electronic expansion valve or the frequency of a compressor to adjust the heating temperature of a first indoor heat exchanger so that the fresh air can be cooled and dehumidified when flowing through the second indoor heat exchanger. And the temperature fine adjustment step is used for increasing the temperature of the cooled fresh air when the cooled fresh air flows through the first indoor heat exchanger. According to the control method of the air conditioner, fresh air dehumidification can be achieved.

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

The invention discloses a preparation method of omega-3 fatty acid ethyl ester 90 soft capsules, which comprises the following steps: 1) preparing raw materials and auxiliary materials: weighing gelatin, glycerol, purified water and omega-3 fatty acid ethyl ester 90 according to prescription dosage for later use; (2) preparing a glue solution, namely heating purified water to 80 DEG C, sequentially adding glycerol and gelatin for capsules, stirring until the gelatin for capsules is melted, carrying out vacuum stirring and degassing for more than 30 minutes, and standing and degassing for 30-60 minutes; 3) pelleting: adjusting the temperature of a capsule box, the temperature of a spraying body, the rotating speed of a main shaft and the refrigeration temperature of a roller, adjusting the thickness of a wet capsule skin, adding the omega-3 fatty acid ethyl ester 90 prepared in the step 1) into a hopper, and starting pelleting; and 4) drying: controlling the temperature of a drying chamber at 10-30 DEG C, controlling the humidity below 40%, and drying until the water content of the capsule skin is less than 13% to obtain the omega-3 fatty acid ethyl ester 90 soft capsule, the process is simple, and the prepared omega-3 fatty acid ethyl ester 90 soft capsule has good disintegration effect and stable performance.

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.