529results about How to "Improve heating effect" patented technology

The invention relates to the technical field of electric vehicle heat management, in particular to an indirect heat pump type heat management system. Comprising an electric drive cooling liquid loop, a battery cooling liquid loop, a heating cooling liquid loop and a refrigerant loop. The heating cooling liquid loop comprises a first heating loop and a second heating loop; the first heating loop is connected in series with a warm air core body; the second heating loop exchanges heat with the battery cooling liquid loop through the battery heating heat exchanger; the refrigerant loop comprises a first refrigerating loop, a second refrigerating loop and a third refrigerating loop; the first refrigerating loop exchanges heat with the heating coolant loop through the water-cooled condenser; the second refrigerating loop exchanges heat with the battery cooling liquid loop through the battery cooling heat exchanger; an evaporator used for cooling the passenger compartment is connected to the third refrigeration loop in series. And the battery cooling liquid loop and the electric drive cooling liquid loop are mutually coupled and communicated. The indirect heat pump type heat management system can well meet the heating requirements of a battery pack and a passenger compartment.

The invention provides an automobile heat management system and a control method thereof. The automobile heat management system comprises a compressor, an evaporation heat exchanger, a condensation heat exchanger, a first throttling device, a first in-automobile heat exchanger, a second in-automobile heat exchanger, a vehicle-mounted refrigerator, a motor and a battery. The first in-vehicle heat exchanger can exchange heat with the evaporation heat exchanger through the cold carrying pipeline, and the second in-vehicle heat exchanger can exchange heat with the condensation heat exchanger through the cold carrying pipeline. The vehicle-mounted refrigerator can exchange heat with the evaporation heat exchanger through the cold carrying pipeline; the motor can exchange heat with the evaporation heat exchanger through the cold carrying pipeline; the battery can exchange heat with the evaporation heat exchanger through the cold carrying pipeline or exchange heat with the condensation heat exchanger through the cold carrying pipeline; the multi-way valve is provided with a plurality of connectors, and a channel for connecting and disconnecting two of the connectors is arranged in the multi-way valve. According to the vehicle-mounted refrigerator, the problems that the vehicle-mounted refrigerator is low in energy efficiency, high in cost and large in occupied space can be effectively solved.

The invention relates to the technical field of automobile air conditioners, in particular to an air inlet structure with a compensation air opening and an automobile air conditioner. The ventilation structure with the compensation air opening comprises a ventilation box and a ventilation device, wherein an outer circulation air inlet, an inner circulation air inlet, the compensation air opening and an air outlet are sequentially formed in the ventilation box; the air conditioner filter element is installed on the inner wall of the ventilation box in an abutting mode and located between the inner circulation air inlet and the compensation air opening. The air door is rotationally installed on the inner wall of the ventilation box, and the driving piece drives the air door to rotate so as to seal the outer circulation air inlet or the inner circulation air inlet. The structure can reduce the filtering burden of the air conditioner filter element, prolong the service life of the air conditioner filter element, reduce air noise, serve as a partition plate, reduce leakage of cold air or hot air, save energy consumption and remarkably improve the refrigerating or heating effect of an air conditioner.

According to the liquid accumulator, the rolling rotor compressor and the air conditioner, shielding faces are matched with fisheye vent holes, when gas passes through the fisheye vent holes, the gas can be exhausted from one sides of the shielding faces of the fisheye vent holes, the two shielding faces in each pair are distributed on the sides, away from each other, of the two fisheye vent holes, and the two fisheye vent holes are communicated with each other. The two fisheye vent holes are formed in the liquid storage device, gas in the two vent holes collides and converges between the two fisheye vent holes after being exhausted, the flow speed of the collided gas is reduced, refrigerating machine oil in refrigerant gas is separated out, the separated refrigerating machine oil drips into the bottom of the liquid storage device, and when the liquid level reaches a certain height, the refrigerating machine oil can flow back to the pump body through the oil return hole; according to the device, the flowing direction of the gas when the gas penetrates through the fisheye vent holes is changed, oil-gas separation is assisted through collision of the gas, the gas flow oil separation effect is improved, the refrigerant gas and refrigerating machine oil are separated more sufficiently, and the oil-gas separation efficiency is improved. And the refrigerating or heating capability of the air conditioner during use is improved.

The utility model relates to the technical field of solar greenhouse energy conservation, in particular to a solar long-term soil-hydrated salt heat storage and supply solar greenhouse system which comprises a greenhouse, a solar heat collection circulating unit, a soil-hydrated salt heat storage and supply unit and an automatic control unit. According to the system, solar heat collection and soil-hydrated salt composite heat storage and supply technologies are innovatively combined, and seasonal effective storage and utilization of solar energy are achieved. In the non-heating season with rich solar energy, the system efficiently collects solar energy through the heat collector and converts the solar energy into heat energy, and then heat energy is stored through the soil-hydrated salt mixed material and the high heat storage performance and excellent heat stability of soil. In the heating season, the stored heat energy is released to the greenhouse, and a stable heat source is provided for crop growth. The system has the advantages of being high in energy efficiency, environmentally friendly, sustainable and the like, is suitable for sunlight greenhouses under various weather conditions, and has important significance in promoting green agriculture and renewable energy source application.

The invention relates to the technical field of warm air blower monitoring, and particularly discloses a warm air blower monitoring method and system based on the Internet of Things, the warm air blower comprises a fan and a heating component and is applied to an Internet of Things monitoring module, and the method comprises the steps that indoor real-time environment information and set running state information of the warm air blower are obtained based on the Internet of Things monitoring module, the set operation state information comprises an air outlet speed value of a fan and a heating power value of a heating part; acquiring a plurality of divided areas according to the indoor real-time environment information, and acquiring an area air resistance value and a temperature diffusion value of each divided area; and according to the regional air resistance value, a regional airflow blocking value corresponding to each divided region is obtained, and the indoor airflow attenuation degree is calculated according to the air outlet speed value and the regional airflow blocking values corresponding to all the divided regions. The airflow attenuation degree is accurately calculated, the airflow loss details are clearly presented, the wind speed is reasonably adjusted in an assisted mode, and heat is evenly distributed.

The embodiment of the invention provides a defrosting control method and device, an air conditioner and a computer readable storage medium. The defrosting control method comprises the steps that the frosting degree of an outdoor heat exchanger is determined; in response to determining that the outdoor heat exchanger is in the thin frost state, the air conditioner is controlled to enter a thin frost non-reversing defrosting mode; in response to determining that the outdoor heat exchanger is in the medium frost state, the air conditioner is controlled to enter a medium frost non-reversing defrosting mode; and in response to determining that the outdoor heat exchanger is in the heavy frost state, the air conditioner is controlled to enter a reverse circulation defrosting mode.

The present invention relates to the technical field of energy supply equipment, and discloses an air source heat pump heat exchange device, including a first heat exchange component and a second heat exchange component, wherein the first heat exchange component and the second heat exchange component both include a housing, an evaporator, a multi-stage compressor, a condenser, an expansion valve and a phase change material module, wherein the evaporator, the multi-stage compressor, the four-way valve, the condenser and the expansion valve are all installed in the housing, wherein the evaporator absorbs low-temperature heat from the external air through a heat dissipation fan. The phase change material introduced in the present invention can store and release heat, release the stored heat in a low-temperature environment, improve the heating effect, and enhance the system's ability to adapt to extreme environments. At the same time, the introduction of a multi-stage compressor can improve the refrigeration capacity. The multi-stage compressor adjusts the working mode at extremely low temperatures to improve the system's refrigeration capacity, and adjusts the compressor operation mode according to the external temperature, flexibly adjusts the energy consumption, optimizes the system's energy efficiency, and reduces the energy consumption cost.

The utility model relates to an air source heat pump system which can respectively control two air side heat exchangers arranged in parallel through two four-way valves arranged in parallel, a one-way valve and a two-way valve, and in a conventional heating mode, the two air side heat exchangers serve as evaporators to absorb heat of air, so that the heating capacity of the system is improved; in the anti-frosting heating mode, the second air side heat exchanger serving as an evaporator is converted into the condenser for use, a small part of heating capacity of the system is sacrificed, it is guaranteed that the first air side heat exchanger and the second air side heat exchanger are not frosted, and therefore after the system operates for a period of time, defrosting of an anti-heat pump can be omitted, and the system reliability is improved. The continuity and stability of heating of the system are guaranteed, it is guaranteed that the water temperature of hot water does not fluctuate, and the heat using experience of a user is improved; meanwhile, the problem that the heat exchange capacity of the air-side heat exchanger is seriously reduced due to frequent frosting of the air-side heat exchanger and accelerated aging of the air-side heat exchanger in the defrosting process is solved.

The invention relates to the technical field of semiconductor manufacturing, and discloses a cover plate assembly, a semiconductor processing chamber and semiconductor coating equipment, and the cover plate assembly comprises a cover plate which is provided with one or more observation holes in a penetrating manner along the thickness of the cover plate; the observation structure comprises a convex observation window arranged in the observation hole, and the first side face of the convex observation window is a protruding part and deviates from the semiconductor processing chamber. In this way, the heating capacity of the observation window can be effectively improved, and therefore the situations of cracks, fragmentation and the like of the observation window are reduced.

The invention discloses an anti-pilling acrylic fabric and a production method thereof.The production method includes the steps that acrylic fibers and acetate fibers are blended to obtain blended yarn, the blending ratio of the acrylic fibers to the acetate fibers is 50: 50, the spinning count is 50 S, during blending, the specification of the acrylic fibers is 0.8 D * 38 mm, the acetate fibers are 1.2 D * 38 mm cotton-type short fibers, the specification of the acrylic fibers is 0.8 D * 38 mm cotton-type short fibers, the specification of the acetate fibers is 0.8 D * 38 mm cotton-type short fibers is 0.8 D * 38 mm cotton-type short fibers, and the specification of the acrylic fibers is 0.8 D * 38 mm cotton-type short fibers; weaving the blended yarns into a warp satin weave fabric, wherein the warp and weft density is 787 * 374 / 10cm; the fabric is processed through the steps of preparing, spinning, slashing, weaving and finishing and dyeing. According to the invention, the acetate fiber is adopted as a raw material and is blended with the anti-pilling acrylic fiber, so that the acetate fiber has good natural air permeability and quick drying, not only keeps the warm keeping and softness of the acrylic fiber, but also embodies the brilliant color, bright appearance, smooth contact, easy care and wrinkle resistance of the acetate fiber.

The heating wallboard sequentially comprises a surface decoration layer, an upper layer PPF composite fiber board, a graphene heating film, a pure aluminum reflecting film and a lower layer PPF composite fiber board from top to bottom, the graphene heating film is provided with two wiring points, and the lower layer PPF composite fiber board is provided with two holes right opposite to the wiring points. The heating wallboard has the advantages of being good in heating effect, environmentally friendly in production and use, light in product weight, stable in physical property, good in waterproof performance, durable in heat resistance and heat preservation and the like.

The invention discloses an electric vehicle thermal management system which comprises a refrigerant management module, a passenger compartment thermal management module, a battery pack thermal management module, an electric drive thermal management module and a low-temperature radiator module, wherein the passenger compartment thermal management module, the battery pack thermal management module, the electric drive thermal management module and the low-temperature radiator module are communicated with a twelve-way valve. The refrigerant management module is provided with a hot gas bypass branch, the hot gas bypass branch is provided with an electromagnetic valve with the opening degree capable of being controlled, and connection or disconnection between the refrigerant module and the passenger compartment heat management module, the battery pack heat management module, the electric drive heat management module and the low-temperature radiator module and the working mode of the refrigerant management module are completed by combining a twelve-way valve. High integration of an electric automobile heat management system can be achieved, normal work of a heat pump under the extremely low temperature working condition is guaranteed, the heating capacity is improved, and the problem that a compressor is frequently started and stopped during refrigeration is solved. The invention further provides a control method of the electric vehicle thermal management system.

The utility model discloses an air conditioning system, which belongs to the technical field of air conditioners and comprises an outdoor heat exchanger, a compressor, a convection tail end, a radiation tail end, an electric ball valve and a second expansion valve, the outdoor heat exchanger is used for exchanging heat with outdoor air; the compressor is used for driving a refrigerant to flow; the heat exchanger communicates with the outdoor heat exchanger; the first expansion valve is used for throttling a refrigerant passing through the first expansion valve; the convection tail end is used for performing convection heat exchange with indoor air; the convection terminal comprises an indoor heat exchanger, and the indoor heat exchanger, the compressor, the outdoor heat exchanger and the first expansion valve form a first refrigerant circulation loop through a pipeline. The radiation tail end is used for performing radiation heat transfer with indoor air; the radiation tail end and the convection tail end are arranged in parallel; the radiation tail end, the compressor, the outdoor heat exchanger and the first expansion valve form a second refrigerant circulation loop through a pipeline; the electric ball valve is arranged in the second refrigerant circulation loop, located between the radiation tail end and the compressor and used for adjusting the flow of the refrigerant flowing from the radiation tail end to the compressor. The second expansion valve is arranged in the second refrigerant circulation loop, located between the outdoor heat exchanger and the radiation tail end and used for throttling the refrigerant passing through the second expansion valve.

The invention relates to the technical field of heating furnaces, and discloses a heating furnace convenient for uniform heating, which comprises a heating furnace body, the top of the heating furnace body is fixedly connected with an exhaust port, the bottom of the heating furnace body is fixedly connected with a base, a uniform heating mechanism is arranged in the heating furnace body, and a telescopic mechanism is arranged on the outer side of the uniform heating mechanism. And a closing mechanism is arranged on the front side of the uniform heating mechanism. According to the heating furnace convenient for uniform heating, through the arrangement of the uniform heating mechanism, a worker only needs to start a driving motor to drive a plurality of material placing discs to rotate around a six-edge rotating shaft in the heating furnace body, so that positions of materials placed on the material placing discs can be continuously switched, and all parts of the materials in the material placing discs are uniformly heated; the heating effect of materials in the material placing disc is improved, the negative influence caused by uneven heating of the materials in the heating process is reduced, and the heating effect of the heating furnace in use is improved.

The invention provides a motor control method and device, electronic equipment and a readable medium. The method comprises the steps that the initial voltage and the target heating value of a driving motor of the vehicle are obtained, the working torque of the driving motor is determined, and the initial voltage is lower than or equal to the voltage of a power battery of the vehicle; if the target calorific value is higher than the calorific value threshold value, the boost voltage of the driving motor is determined according to the working torque of the driving motor, the vehicle speed of the vehicle and a boost voltage relation table, the boost voltage is higher than the voltage of a power battery, and the boost voltage relation table comprises the corresponding relation between the vehicle speed and the motor torque and the boost voltage; determining a target working voltage according to the boosting voltage of the driving motor and the target heating value; and outputting the target working voltage to the driving motor. The method can ensure the working temperature of the power battery and improve the use experience of the vehicle.

The invention discloses a defrosting control system applied to a live AI fin, and relates to the technical field of refrigeration, heat pump industry and air source heat pump unit defrosting systems, and the defrosting control system comprises an evaporator inlet air moisture content calculation module, an evaporator exhaust air moisture content calculation module, an evaporator frosting amount calculation module and a defrosted amount calculation module; according to the method, the frosting amount of unit mass air passing through fins of the evaporator is calculated according to the inlet / exhaust air moisture content difference value of the evaporator; according to the integral principle, the frosting amount of the current evaporator is calculated in a real-time accumulation mode, and when the frosting amount reaches a preset value, namely, the defrosting condition is met, defrosting is started; the current defrosted amount is calculated in real time in the defrosting process, and when the defrosted amount reaches the preset value of the frosting amount, defrosting is finished; accurate defrosting is realized; the problems of false defrosting and incomplete defrosting of a traditional air source heat pump are solved; and the heating performance and the comprehensive energy efficiency ratio of the air source heat pump are further improved.

The utility model relates to a laneway air heating heat recovery system, which comprises a fresh air heating assembly, a first liquid coil pipe and a first fan, the fresh air heating assembly comprises an air inlet, a first liquid coil pipe and a first fan, the first liquid coil pipe is positioned between the air inlet and the first fan, the output end of the first fan is used for being communicated with an inlet of a laneway, and the air inlet is provided with a first temperature sensing piece connected with a controller; the ventilation air methane heat recovery assembly comprises an air collecting opening, a second liquid coil pipe and a second fan, the air collecting opening is used for being communicated with an outlet of the roadway, the second liquid coil pipe is located between the air collecting opening and the second fan, the first liquid coil pipe is provided with a second temperature sensing piece connected with the controller, and a first flow channel and a second flow channel are connected between the first liquid coil pipe and the second liquid coil pipe; the first flow channel is provided with a first three-way valve; the second flow channel is provided with a second three-way valve and a driving pump; and the deep heat recovery assembly is connected between the first three-way valve and the second three-way valve. According to the utility model, resource consumption can be reduced, and atmospheric pollution is reduced.

The invention relates to the technical field of autoclave forming dies, and discloses a bullet train protection plate autoclave forming die which comprises a chassis and a bottom plate which are integrated, the bottom face of the chassis is of a grid structure, the top of the chassis is connected with the bottom plate through a supporting structure so that the bottom plate can be communicated with the outside, and a protection plate material containing groove is formed in the top face of the bottom plate. A plurality of through holes are formed in the side face of the chassis so that the through holes in the side face can communicate with the grid structure. Uniform distribution of heat is facilitated, stress concentration is reduced, the heating performance and the heat dissipation performance are improved, and sufficient heat stability and heat conduction coefficient are achieved, so that the production cost is reduced; through combination of a grid structure and a protection plate mold containing groove, the self weight is reduced so as to reduce the production and transportation cost, meanwhile, the strength and rigidity are kept, material use is optimized, reinforcing ribs are combined on the edge of the mold, stability and durability are improved, and fatigue and deformation risks are reduced; the net rack design facilitates heat dissipation, heat stability is improved, forming precision is ensured, and product defects are reduced.

The invention relates to the technical field of thermal management of electric vehicles, in particular to a multi-source heat pump control method and system for thermal management of a pure electric vehicle and a medium, and the method comprises the following steps: selecting a corresponding multi-source heat pump control mode according to heating or refrigerating requests sent by a passenger compartment and a battery in combination with vehicle conditions, vehicle speed and environment temperature; measuring the surface temperature T7 of the warm air core; the difference value delta T7 between the surface temperature T7 of the warm air core and the target temperature T7m of the warm air core is calculated, and PI adjustment is conducted on the rotating speed of a compressor according to the difference value delta T7; by adjusting the opening degree of the three-way valve D, the heating requirement of the battery or the passenger compartment is met. According to the actual running state of the vehicle, multiple heat sources can be selected in good time, electric drive waste heat is fully utilized, and energy waste is avoided; the electric automobile can work in the field of the extremely low temperature of-40 DEG C, and the cruising ability of the electric automobile in winter and the comfort level of passengers are guaranteed. Therefore, the technical problems that an existing heat management system is low in heating efficiency and insufficient in heating capacity can be solved.

The invention discloses a boron nitride conductive ceramic evaporation boat and a preparation method thereof. The boron nitride conductive ceramic evaporation boat comprises the following raw materials in parts by weight: 80-100 parts of boron nitride, 30-40 parts of titanium boride, 30-40 parts of zirconium silicate, 10-15 parts of boron oxide, 10-15 parts of nano carbon black, 8-12 parts of silicon carbide, 4-6 parts of nano yttrium oxide and 1-2 parts of polyacrylamide. The preparation method comprises the following steps: (1) weighing the raw materials, and uniformly mixing; (2) wet ball milling; (3) drying; (4) cold isostatic pressing forming; and (5) carrying out hot pressed sintering and cooling. The long-term stability of the product is improved, the produced product has advanced performance and quality, shorter preheating time, better molten aluminum spreading capacity, fewer sputtering and boat bending problems, longer service life and more economic choices, production of various materials such as metallized films, paper and textiles can be met, and the production cost is reduced. The aluminum-plated film is widely applied to the industries of vacuum evaporation packaging materials, capacitor metallization vacuum coating, paper aluminum plating, gold stamping plating, anti-counterfeiting mark aluminum plating and the like.

The utility model relates to the technical field of heat treatment furnaces, and discloses a heat treatment furnace for metal heat treatment, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a fixed furnace, a controller is arranged above the bottom plate, and a sawtooth ring, a fixed frame and two groups of heating rods are respectively arranged in the fixed furnace. The upper surface of the fixing frame is fixedly connected with two sets of rotating bearings, the upper surface of the inner ring of each rotating bearing is fixedly connected with a containing plate frame, the outer surface of each containing plate frame is fixedly connected with a gear, and the outer surface of each gear is meshed with the inner wall of the sawtooth ring. According to the heat treatment furnace for metal heat treatment, through rotation of the rotating motor, the fixing frame, the rotating bearing, the gear, the containing disc frame and a metal material can be driven to rotate, and through cooperation of rotation of the rotating bearing and meshing of the gear and the sawtooth ring, the metal material can rotate by 360 degrees while rotating in the fixing furnace; and the heating uniformity and effect of metal material heat treatment are further improved.

The invention belongs to the field of air conditioners, and discloses an air conditioning system and a control method of the air conditioning system, and the air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a battery heat dissipation heat exchanger, a first expansion valve, a second expansion valve, a defrosting coil pipe and a three-way valve. The dual functions of indoor heating and battery heat dissipation are achieved. And in the heating mode, heat generated by the battery is recycled and used for air conditioner heating through the first channel and the second channel which can exchange heat with each other, so that the system can effectively dissipate heat of the battery while heating indoors. Meanwhile, through the integrated design of the defrosting coil pipe and the outdoor heat exchanger, the system is allowed to guide the high-temperature cooling liquid of the battery unit to the defrosting coil pipe through the three-way valve when needed, and the outdoor heat exchanger is defrosted through heat generated by the battery. By means of the design, the defrosting efficiency is improved, heat exchange performance reduction caused by frosting is reduced, and the heating capacity of the air conditioning system is further improved.

The invention relates to the technical field of energy-saving, carbon-reducing and low-energy-consumption buildings, in particular to an efficient air source heat pump station room system which comprises an intelligent control system, an air source heat pump system, a circulating pump set, a constant-pressure water replenishing vacuum degassing unit, a decontamination system, a water softening system, pipelines and valves, the high-performance air source heat pump unit is managed through the intelligent control system to produce cold and heat in a partitioned and batched mode, and the cold and heat are supplied to an air conditioner or a heating tail end through the integrated high-efficiency circulating pump set through a low-resistance pipeline and a valve arranged in the system. In order to ensure long-term, stable and reliable operation of the system, cold and hot water passes through a decontamination system and a constant-pressure water replenishing vacuum degassing unit after being used at the tail end and before returning to the unit, and by means of a series of innovative means such as system partitioning, arrangement of partition matched electric valves and interlocking with a heat pump unit and a water pump, energy-saving and carbon-reducing operation is achieved, and energy conservation and emission reduction are achieved. And the system is subjected to refined operation adjustment according to partitions.

The present invention relates to the field of microgrid energy storage, and specifically to an energy storage device applied to a microgrid, comprising a shielding mechanism, which is used to protect and shield the entire energy storage device; an energy storage mechanism, which is used to store electric energy more quickly; a stabilizing mechanism, which is used to improve the stability of the entire energy storage device; the shielding mechanism is fixedly mounted on the energy storage mechanism, and the energy storage mechanism is fixedly mounted on the stabilizing mechanism; wherein the energy storage mechanism comprises a fan blade, the inner end of the fan blade is fixedly connected to a rotating shaft, and the end of the rotating shaft away from the fan blade is transmission-connected to a generator. The energy storage device applied to the microgrid usually has a larger contact resistance than the line body due to factors such as connection process and contact surface flatness at the interface, and more heat is generated when current passes through, so it needs to be cooled to reduce energy loss.

The invention discloses an aluminum oxide roasting furnace feeding device capable of utilizing flue gas waste heat, and relates to the technical field of roasting furnace feeding devices.The aluminum oxide roasting furnace feeding device comprises a barrel, a feeding port and a discharging port, a rotating shaft is rotationally arranged in the barrel, two blocking plates are fixedly arranged on the rotating shaft, and an exhaust cavity and an air inlet cavity are formed in the positions, located on the outer sides of the two blocking plates, in the barrel respectively; the feeding device comprises a rotating shaft, the rotating shaft is fixedly provided with a spiral packing auger, a flue is formed in the spiral packing auger, the two ends of the flue are located on the outer sides of the two plugging plates and communicate with the exhaust cavity and the air inlet cavity correspondingly, and the feeding device further comprises a cleaning piece used for cleaning the flue. According to the spiral auger, the heat loss is reduced, materials can be heated from the interior by introducing smoke into the spiral auger, the heating effect of the materials is improved, a flue in the spiral auger can be cleaned through the cleaning piece, and the heat dissipation effect of the spiral auger is improved.

The utility model discloses a rectification extraction device capable of improving the quality of propylene glycol, which belongs to the technical field of rectification and is characterized in that propylene glycol steam generated at high temperature is introduced into a preheating tank and is conveyed upwards along a spiral preheating structure to transfer heat to a mixed solution containing propylene glycol, which is conveyed downwards by the preheating structure, so that the quality of propylene glycol is improved. According to the multi-stage rectification device, the temperature of mixed liquid primarily entering the first rectification tower is effectively increased, propylene glycol steam after being cooled is guided into the second rectification tower to be subjected to secondary rectification after being cooled by the condenser, and the rectification effect is effectively improved through multi-stage rectification, in addition, a stirring barrel matched with a stirring shaft is additionally arranged in the first rectification tower, and the rectification efficiency is improved. Waste liquid in the second rectifying tower is guided into the stirring barrel through the second discharging pipe and mixed with preheated mixed liquid, on one hand, the waste liquid with waste heat is used for conducting secondary preheating on the mixed liquid, on the other hand, the stirring structure is additionally arranged, the heating uniformity of the mixed liquid is improved, and the heating effect is enhanced.

The utility model relates to the technical field of heating and ventilation equipment, and provides an efficient heat dissipation device which is characterized in that a heating radiator is arranged above a bottom bearing plate, and the bottom bearing plate is provided with longitudinal limiting protrusions extending upwards; the back heat insulation plate is arranged above the bottom bearing plate, the back faces of the heating radiators make contact with the back heat insulation plate, and the front faces of the heating radiators make contact with the back faces of the longitudinal limiting protrusions. The end limiting plate is located on the front face of the back heat insulation plate, a transverse limiting protrusion is arranged at the end, close to the longitudinal limiting protrusion, of the end limiting plate and located above the longitudinal limiting protrusion, the front face of the heating radiator makes contact with the back face of the transverse limiting protrusion, and the side face of the heating radiator makes contact with the end limiting plate. By means of the technical scheme, the problems that in the related technology, heat emitted by the back face of a heat dissipation device is directly absorbed by a wall, the indoor heating effect is affected, the color of the wall changes after long-time heating, the wall even cracks and falls off, and the indoor attractiveness is affected are solved.

The utility model discloses a PTC (Positive Temperature Coefficient) heating corrugated pipe for a warmer, which relates to the technical field of warmers and comprises a shell, a heating mechanism is arranged in the shell, a ventilation mechanism for air inlet and outlet is arranged on the surface of one side of the shell, and a protection component for protection is arranged on the surface of one side of the shell. An auxiliary assembly is further arranged on the surface of one side of the shell, the heating mechanism comprises a plurality of corrugated pipe bodies, sleeves are arranged on the surfaces of one sides of the corrugated pipe bodies, the sleeves are fixedly installed on the surface of one side of an installation base, the installation base is fixedly installed on the surface of one side of the shell, a storage battery is further arranged on the bottom face of the shell, and a temperature sensor is arranged on the upper surface of the shell. According to the scheme, due to the fact that the heating mechanism and the ventilation mechanism are arranged, the energy efficiency of the warmer is improved, energy waste is reduced, and the use safety is remarkably enhanced.

The utility model discloses an air conditioner indoor unit. The air conditioner indoor unit comprises a unit body, and the unit body comprises a shell, a first air outlet, a second air outlet, a return air inlet and an air duct arranged in the shell, the first air outlet is formed in the front side of the shell. The second air outlet is formed in the bottom of the shell. The return air inlet is formed in the top of the shell. The air inlet end of the air duct communicates with the air return opening. The air outlet end of the air duct communicates with at least one of the first air outlet and the second air outlet. In the refrigeration mode, the air outlet end of the air duct communicates with the first air outlet, discomfort caused by direct blowing of cold air to the human body is effectively reduced, in the heating mode, the air outlet end of the air duct communicates with the second air outlet, it is guaranteed that hot air flows downwards and directly reaches the ground, and the good heating effect and use experience are achieved. In conclusion, cold air can be conveyed upwards, hot air can be conveyed downwards, and the use comfort of a user is remarkably improved.