24results about How to "Avoid frost" patented technology

The invention provides a compound evaporator coupled with multiple heat sources, and a heat pump system thereof. The use efficiency of a heat pump and the energy utilization rate are improved while the coupled use of the multiple heat sources is achieved; meanwhile, flue gas waste heat can be recycled, and purification is achieved; and the side of the evaporator is prevented from being frosted effectively. The compound evaporator comprises a shell, and flanges arranged at the two ends of the shell; the shell comprises an outer shell and an inner shell; a spiral refrigerant flow channel is arranged in a clearance between the outer shell and the inner shell; an inside cavity of the inner shell forms a coupled working medium flow channel, and the two ends of the inner shell are provided witha coupled working medium inlet and a coupled working medium outlet separately; the outer side of the outer shell is provided with a plurality of flue gas cooling fins, and a flue gas channel used forheat exchange is formed between the adjacent flue gas cooling fins; and the two ends of the outer shell are separately provided with a refrigerant inlet and a refrigerant outlet which communicate withthe refrigerant flow channel.

The utility model relates to an intelligent family camera device belongs to camera technical field, including fixed rib plate, the front of fixed rib plate is equipped with camera body, the front of fixed rib plate is equipped with the installation mechanism for conveniently installing camera body, the inner chamber of camera body is equipped with anti -frosting mechanism for preventing frost, the installation mechanism includes connecting seat, rotary rod, worm wheel, worm, two -way screw rod, two rotary straight -toothed gears, two movable plates, two linkage blocks and four clamping blocks, and the connecting seat is hinged and is connected on the front of fixed rib plate through the hinged seat. The intelligent family camera device, the installation mechanism that sets up can be convenient for fixing camera body, and it is convenient for staff to dismantle when maintaining, improves the installation efficiency of camera body, and the stability that improves camera body fixed, realizes the cost competitiveness while maintaining the substantial promotion imaging quality and dark state perception ability.

The application discloses a novel positive pressure type chemical oxygen respirator and relates to the technical field of breathing equipment, which aims to solve the technical problems that the chemical oxygen respirator is difficult to achieve reliable positive pressure protection effect and the mask is easy to fog and frost in the prior art. The novel positive pressure type chemical oxygen respirator comprises a breathing mask, an exhalation pipe, a main machine backpack, an exhalation bag, an inhalation pipe, an oxygen generation tank and a cooling box, the oxygen generation tank and the cooling box are fixed in the main machine backpack, the breathing mask is connected with the exhalation bag, and the exhalation pipe enters the main machine backpack to communicate the exhalation bag with the oxygen generation tank. The novel positive pressure type chemical oxygen respirator can provide positive pressure protection, can defog and self-clean the eyepiece of the breathing mask, and can prevent the vision of a user from being blocked.

This utility model provides a refrigerator, including: an evaporator, a freezer compartment, a drain pipe, an outer pipe, and an insulation layer. The evaporator is located above the freezer compartment, and the insulation layer is located on one side of the freezer compartment in the horizontal direction. At least a portion of the drain pipe is disposed within the insulation layer. The outer pipe is sleeved on the outer periphery of at least a portion of the drain pipe or disposed on the inner periphery of at least a portion of the drain pipe. Condensate generated by the evaporator can be received in the drain pipe, and refrigerant can be introduced into the outer pipe so that the refrigerant can heat the condensate and prevent the drain pipe from freezing or frosting. This utility model can simultaneously achieve a thinner overall refrigerator size and ensure that the drain pipe does not freeze or frost; effectively solving the problem in existing refrigerators that cannot simultaneously ensure that the evaporator drain pipe does not freeze or frost and achieve a thinner overall refrigerator size.

An aircraft electronic equipment compartment ventilation cooling device for an aircraft electronic equipment compartment ventilation system having a fan, comprising: a cooler for cooling air delivered to the aircraft electronic equipment compartment by the fan; a demister for removing condensed water droplets from the cooled air after passing through the cooler; and a dehumidifier for removing condensed water droplets not removed by the demister from the air after passing through the demister. The moisture absorbing material in the dehumidifier is dried and regenerated by dry outside air when the aircraft is flying at high altitudes and the like where the air humidity is low.

The invention relates to an air conditioner control method and device, air conditioner equipment and a storage medium. The method comprises the steps that the current operation condition is determined based on the outdoor environment temperature and humidity and the evaporator temperature of the air conditioner circulation system; when the current operation working condition is the high-temperature working condition, an energy storage switching module in the air conditioner circulating system is controlled to absorb heat of a refrigerant according to an energy storage supercooling mode for heat storage so as to absorb condensation waste heat generated during system refrigeration, and energy waste is avoided; when the current operation working condition is the low-temperature working condition, the energy storage switching module is controlled to conduct heat release on a refrigerant according to a heat release frost prevention mode so as to increase the temperature of the refrigerant, the temperature of the refrigerant flowing through the evaporator is increased so as to maintain the surface temperature of the evaporator to be higher than the freezing point temperature, and the surface of the evaporator is prevented from frosting; therefore, the problem that an existing air conditioning system cannot intelligently dispatch energy and collaboratively optimize all-working-condition performance is solved.

The application provides a multi-source switchable one-machine four-state intelligent air conditioner hot water system and a control method, and relates to the technical field of heat pump air conditioner hot water systems.The system comprises an integrated heat exchange host, a hot water tank, a cold water tank and an intelligent controller component.The integrated heat exchange host integrates core components such as a condensing unit, an evaporating unit, a compressor and a throttling device, and realizes the switching of four working modes, namely air conditioner refrigeration and hot water preparation, air conditioner heating and cold water preparation, cold and hot water preparation and air conditioner independent operation, through the on-off combination of four electromagnetic valves, the start-stop control of a circulating pump and a fan;the intelligent controller automatically controls the states of components according to preset logic based on temperature signals collected by sensors and user instructions, and can also adjust the power of a variable frequency compressor and the opening degree of an electronic expansion valve.The application solves the problems of single heat source and rigid energy utilization of traditional systems, realizes efficient operation in a wide working condition, improves the energy utilization rate and meets the diversified use requirements of users.

The application discloses a device for realizing micro-ice crystal freezing and melting, which comprises a micro-ice crystal suspension freezing device and an ice crystal melting device; the micro-ice crystal suspension freezing device is used for generating micro-ice crystal particles which are suspended in the air and do not directly contact with a wall surface; the ice crystal melting device is used for controlling temperature and gradually melting the ice crystals under certain conditions; the micro-ice crystal suspension freezing device comprises a water chiller, an ice crystal suspension freezing assembly, a temperature controller, a temperature sensor and a direct-current adjustable power supply. The device for realizing micro-ice crystal freezing and melting can generate ice crystals with different particle sizes and is provided with a melting device, thereby laying a foundation for measuring the temperature and the melting rate in the freezing generation and the melting process of the ice crystals with different particle sizes.

The application discloses a control method and device for reducing frost formation on a front windshield of a real vehicle and a storage medium, and belongs to the technical field of vehicles. Step S1 is to determine whether a corresponding operation mode of the vehicle is started, if yes, step S3 is executed, and if not, step S2 is executed. Step S2 is to stop the operation of the vehicle, and when the temperature outside the vehicle is lower than a predetermined temperature, a front windshield anti-frost function is started, and whether a corresponding process is executed is determined according to the type of the vehicle, if yes, the corresponding process is executed, and if not, the execution of the corresponding process is stopped. Step S3 is to determine whether the corresponding operation mode of the vehicle is executed, if not, step S2 is executed, and if yes, after the execution of the corresponding operation mode is completed, whether all parameters of the vehicle meet the standard for stopping the operation of the vehicle is determined, if yes, step S4 is executed, and if not, the operation is ended. Step S4 is to start the front windshield anti-frost function, and a corresponding process is executed according to the type of the vehicle.

The application discloses a C-section current lead-to-power copper bar anti-frosting and anti-condensation system, which comprises a total air inlet pipe, one end of the total air inlet pipe is connected with an external air heating device, the other end of the total air inlet pipe is communicated with an air pipe shunt, a plurality of branch air pipes are communicated with the air pipe shunt, and the ends, away from the air pipe shunt, of the branch air pipes are communicated to all parts of the surrounding space and are used for anti-frosting and anti-condensation in the surrounding space. The application is suitable for the anti-frosting technical field of the power copper bar, can form a negative pressure in a relatively closed space, prevent natural air from contacting the C-section current lead and the power copper bar, introduce dry heated air to reduce the dew point, effectively realize low-cost and high-efficiency anti-frosting and anti-condensation of the C-section current lead and the power copper bar in a narrow space, has low investment cost and simple structure, and is very convenient to install, detect and maintain.

This invention provides a heat exchange structure, an air conditioner, and a defrosting control method for the outdoor unit of an air conditioner. The heat exchange structure includes: a heat exchange pipe comprising a first pipe, a second pipe, and a third pipe connected in series, wherein the second pipe is located between the first pipe and the third pipe, the inner diameter of the second pipe is smaller than that of the first pipe, and the inner diameter of the second pipe is smaller than that of the third pipe; an air inlet is formed on the side of the first pipe away from the second pipe, and an air outlet is formed on the side of the third pipe away from the second pipe; a heat exchanger disposed in the second pipe; and a fan disposed on the side of the heat exchange pipe near the air inlet and the side of the heat exchange pipe near the air outlet. This invention solves the problems of increased costs due to the need to increase raw materials when improving the heat exchange capacity of the outdoor unit heat exchanger, and the inability of the indoor unit to continue heating during defrosting of the outdoor unit heat exchanger.

The utility model provides a vehicle air conditioning system, include: a vehicle compressor, a bypass valve is connected between high pressure side and low pressure side of vehicle compressor, a condenser, the first end intercommunication high pressure side of vehicle compressor of condenser, an expansion valve, the first end of expansion valve is connected the second end of condenser, an air conditioner evaporimeter, the first end of air conditioner evaporimeter is connected the second end of expansion valve, and the second end of air conditioner evaporimeter is connected the low pressure side of vehicle compressor, a first temperature sensor is set up in the exhaust end of vehicle compressor, and the control end of expansion valve is connected to first temperature sensor, and a second temperature sensor is set up in the evaporimeter core body of air conditioner evaporimeter, and the control end of bypass valve is connected to second temperature sensor, the utility model discloses can effectively prevent the spring and autumn season vehicle air conditioning evaporimeter frost, avoid the frequent start -stop of compressor, improve stability, the oil return lubrication and cooling effect of compressor.

The defrosting device of the air source heat pump comprises an outer shell and a compressor, an evaporator is fixedly installed in the outer shell, a dehumidifier is arranged on one side of the outer shell, an exhaust pipe is fixedly connected to the other side of the outer shell, an exhaust fan is fixedly connected to the upper end of the outer shell, and the exhaust fan is fixedly connected to the lower end of the outer shell. The input end of the exhaust fan is fixedly connected with one end of an exhaust pipe, a temperature and humidity sensor is fixedly connected to the inner wall of the outer shell, a front cover is fixedly connected to the front end of the outer shell, a wireless module and a controller are fixedly connected to the outer wall of the front cover, and the output end of the dehumidifier is fixedly connected with an air inlet pipe through a flange. And the other end of the air inlet pipe communicates with the interior of the outer shell, and the compressor is fixedly connected to the outer side of the outer shell. The technical problems that according to an existing defrosting device, defrosting operation is mainly conducted after a coil pipe is frosted, hysteresis exists, and the treatment effect is common are solved.

The application discloses a kind of cryogenic liquid flow standard measuring device and measurement method, comprising: by test pipeline sequentially connected liquid nitrogen storage tank, delivery pump, subcooler, first control valve, flow indicator, second control valve, the flowmeter to be detected, the flowmeter to be detected is connected variable pipeline, subcooler is configured to maintain liquid nitrogen supercooling state;First weighing unit, including first weighing tank and first weighing balance, the liquid nitrogen inlet of first weighing tank is equipped with fourth regulating valve;First loop pipeline is connected between delivery pump and subcooler and is connected with liquid nitrogen storage tank, first loop pipeline is equipped with first regulating valve;Second loop pipeline, one end is connected with liquid nitrogen storage tank, and variable pipeline is configured to selectively connect with the other end of second loop pipeline or first weighing tank;Drying unit is connected with first weighing unit, for making first weighing tank in dry environment.The application realizes the high accuracy measurement of the measurement performance of cryogenic liquid flow meter.

This utility model discloses an anti-frost cold storage door, relating to the field of cold storage door technology, aiming to solve the problem of frost buildup on cold storage doors. The key technical points are: it includes a door frame and a door panel rotatably connected to each other; a wiper and a conveyor belt are slidably mounted on the door panel; grooves for the wiper to grip are formed on both sides of the conveyor belt; a cavity is formed inside the door panel; multiple drive wheels are rotatably mounted on the door panel to abut against the conveyor belt; and a drive component for driving the drive wheels is provided in the cavity area; the door frame has drainage holes. In this anti-frost cold storage door, when the cold storage is in operation, the door is powered on to activate the drive component, which in turn drives the wiper via the drive wheels and conveyor belt, ensuring that all four sides of the door panel facing the door frame are cleaned, minimizing water droplet formation and thus preventing frost buildup.

The invention relates to the technical field of heat pump air conditioners, in particular to a heat pump low-temperature heating anti-frosting method and a control system.The method comprises the steps that the environment temperature of a heat pump system is detected; according to the range of the environment temperature, a corresponding control mode is selected, and the control mode comprises an extremely cold mode with the exhaust temperature of a compressor as a main control parameter; in the conventional mode, fin pressure drop of the heat exchanger is used as a main control parameter; in the high-humidity mode, the dryness of a refrigerant in front of an expansion valve is used as a main control parameter; calculating an opening control value of a main valve and a rotating speed control value of a fan; and adjusting the opening of a main valve according to the opening control value, and adjusting the rotating speed of a fan according to the rotating speed control value, so that the coil temperature is higher than the current environment dew point temperature. According to the invention, active anti-frosting control under all working conditions from extremely cold to low temperature and high humidity can be realized, periodic great attenuation of heating capacity caused by thickening of a frost layer is avoided, and stability of the heating capacity and efficient operation of the system are ensured.

The invention discloses a heat pump air conditioning system which comprises a compressor and a heat pump, the four-way reversing valve is connected with the compressor and is configured to change the flow direction of a refrigerant; the indoor heat exchanger is connected with the four-way reversing valve; the outdoor heat exchanger is connected with the four-way reversing valve; the refrigerant storer is configured to store a refrigerant flowing through the refrigerant storer; the first pipeline is configured to connect the outdoor heat exchanger and the indoor heat exchanger; the branch pipeline is configured to be connected with the refrigerant storage and the first pipeline to form a refrigerant flow path; the adjustable on-off device is arranged on the first pipeline, and the adjustable on-off device is configured to adjust the flow of the refrigerant flowing through the refrigerant storage so as to adjust the refrigerant circulation amount in the air conditioning system. According to the air conditioning system, dynamic adjustment of the refrigerant circulation amount can be achieved, so that the requirements of the air conditioning system for the refrigerant amount under different working conditions are met.

The utility model relates to the technical field of refrigeration, in particular to an evaporative refrigeration device and ice making equipment. The evaporation refrigeration device comprises an evaporation pipe, a connector, a first pipeline and a second pipeline. The evaporation pipe is provided with an input end pipe opening, and the connector is connected to the input end pipe opening. A first channel and a second channel are arranged in the connector at intervals, one end of the first channel is communicated with the input end pipe opening, and the other end of the first channel is communicated with the outside. One end of the second channel is communicated with the input end pipe orifice, and the other end is communicated with the outside. The first pipeline penetrates through the first channel, one end of the first pipeline communicates with the evaporation pipe through the input end pipe opening, and the other end of the first pipeline is used for being connected with a condenser so as to transmit refrigerants. The second pipeline penetrates through the second channel, one end of the second pipeline is connected with the evaporation pipe through the input end pipe opening, and the other end of the second pipeline is used for being connected with the compressor to transmit the heating medium. By arranging the evaporation refrigeration device, pipeline connection can be facilitated, and the refrigeration effect can be improved.

This utility model relates to the field of refrigerators, and in particular to a refrigerator drain pipe structure and a refrigerator thereof. The refrigerator drain pipe structure includes a drain pipe and a drip tray, with the drip tray located below the drain pipe. The drain pipe includes an expanding section and a contracting section connected together, with the inner diameter of the contracting section being smaller than that of the expanding section. A sealing element is provided inside the drain pipe, with the outer diameter of the sealing element not less than the inner diameter of the contracting section. The sealing element has a first position capable of abutting against the inner wall of the contracting section, and is configured to move away from the first position in response to external force. Its advantages are that the sealing element can abut against the inner wall of the contracting section to block the drain pipe, preventing external humid and hot air from entering the refrigerator, avoiding the problem of evaporator frost formation, and reducing the refrigerator's energy consumption. When condensate flows into the drain pipe, the gravity of the condensate exerts pressure on the sealing element, causing it to move away from the first position in response to the pressure, thereby opening the drain pipe and allowing the condensate to flow smoothly.

This invention relates to the field of biological sample storage technology and discloses an automated ultra-low temperature micro-positive pressure device and system, comprising: an upper frame and a lower frame; the upper frame includes a micro-positive pressure chamber, a motion module, a PSA nitrogen generation module, and an upper frame base; the micro-positive pressure chamber is disposed on the upper frame base, the motion module is installed inside the micro-positive pressure chamber, and the PSA nitrogen generation module is connected to the micro-positive pressure chamber through a first flange interface; the motion module integrates a cover gripping assembly, a hand gripping assembly, and a pipette tip assembly; the cover gripping assembly is used to grip the cover plate of the chamber or the transport box; the hand gripping assembly is used to grip the sample tray; and the pipette tip assembly is used to aspirate cryopreservation tubes. This invention constructs a micro-positive pressure inert environment, automates sample storage and retrieval, precisely controls temperature, monitors and adjusts in real time, improves the reliability and convenience of ultra-low temperature storage, and ensures the long-term stable preservation of biological samples.

The utility model discloses a sample storage equipment sealing mechanism, including the storage cabin, be provided with the operation area on the storage cabin, the access channel in the operation area, be provided with multiple sets of sealing components on the access channel, multiple sets of sealing components can seal the access channel, and the access channel one side is provided with the gripper mechanism, and the gripper mechanism can drive sealing component movement, and expose partial access channel, and the gripper mechanism can access the board frame in the storage cabin through partial access channel. The utility model has the beneficial effects that by setting multiple sets of sealing components in the access channel, the storage cabin can be effectively sealed and heat-insulated, the sealing performance is improved, energy consumption is reduced, and energy cost is reduced. During the access process, only one set of sealing components is opened and one set of access opening is exposed, so that the gripper mechanism can be used to access the sample in the storage cabin; the area of cold and heat exchange can be effectively reduced, air convection is reduced, and better heat insulation is achieved.

The invention discloses an anti-corrosion glass fiber reinforced plastic gas pipeline and a preparation method thereof, and relates to the technical field of gas pipelines, the anti-corrosion glass fiber reinforced plastic gas pipeline comprises a straight pipe main body, sealing flange modules are arranged at the two ends of the straight pipe main body, a corner joint module is detachably installed on the straight pipe main body through the sealing flange modules, and an anti-freezing module is further arranged in the corner joint module; each of the straight pipe main body and the bent pipe main body is sequentially provided with a lining anti-corrosion layer, a steel inner core pipe, a glass fiber reinforced plastic reinforcing layer and an outer protective layer from inside to outside, the glass fiber reinforced plastic reinforcing layers are made of glass fiber reinforced plastic materials, and the outer sides of the straight pipe main body and the bent pipe main body are coated with the glass fiber reinforced plastic reinforcing layers through a cross winding process and a thermocuring process. The four-layer composite structure of the lining anti-corrosion layer, the steel inner core pipe, the glass fiber reinforced plastic reinforcing layer and the outer protective layer is adopted for synergistic effect, the glass fiber reinforced plastic reinforcing layer wrapped through the cross winding and thermocuring technology is adopted for improving the structural strength and the anti-corrosion capacity, and compared with a traditional single metal pipeline, metal corrosion and material aging are effectively prevented.

This application relates to an evaporator and an air conditioner. The evaporator includes a heat exchange tube and multiple fins. The multiple fins are sequentially arranged along the length of the heat exchange tube. The fins are at least divided into first fins and second fins. The first fin includes at least one fin, and the second fin includes at least one fin. Each fin of the first fin has at least one hydrophobic coating, and each fin of the second fin has at least one hydrophilic coating. At least one second fin is arranged adjacent to the first fin. The hydrophilic coating of the first fin and the hydrophobic coating of the second fin are arranged alternately. The first fin is located at both ends of the heat exchange tube along its length. This application, through the alternating arrangement of the hydrophilic and hydrophobic coatings, makes the evaporator less prone to frost and ice formation, and achieves dual optimization of heat exchange efficiency and drainage performance.

The refrigeration equipment comprises a fresh-keeping chamber, a cold air supply path, a drawer and a cover plate, an interlayer air path is formed between a door plate and a front cover of the drawer, a cold air cavity is formed between the cover plate and the upper wall of the fresh-keeping chamber, the cover plate comprises a moisture permeable module, and cold air blown out of an air outlet forwards blows through the cold air cavity and then downwards blows into the interlayer air path. According to the refrigeration equipment, through the combined design of the moisture-permeable module and the air path, when cold air blows through the cover plate and refrigerates the drawer, excessive moisture in the drawer passes through the moisture-permeable module and is taken away by airflow, so that the humidity in the drawer is effectively reduced, and the cold air blows forwards from the rear of the cavity and blows downwards from the interlayer air path in the front, so that the moisture in the drawer is effectively reduced. The upper surface of the whole cover plate can become a surface through which cold air blows, so that it is possible that the moisture permeable module is arranged on the upper surface of the cover plate as much as possible, the cold air blown out of the cold air supply path is ingeniously utilized to refrigerate and take away moisture at the same time, and the fresh-keeping effect of food materials is improved through large-area refrigeration and humidity adjustment.