634 results about "Air heating" patented technology

The invention discloses an air preheating biomass boiler, belongs to the technical field of boilers, and aims to solve the problems of low combustion efficiency, insufficient flue gas waste heat utilization and particulate matter emission of a traditional biomass boiler. Function optimization is achieved through a main body structure composed of a furnace body, a charging barrel and a rotating pipe, a double-spiral-disc heat exchange assembly is arranged in the charging barrel, biomass fuel is preheated through boiler exhaust smoke waste heat, meanwhile, smoke is discharged through exhaust holes after being distributed through spiral disc gas storage cavities, and unburned particles are filtered by a biomass layer and carried to a hearth to be subjected to secondary combustion; an air inlet cavity is formed in the rotating pipe, and air is preheated through the fixed pipe and the first connecting pipe and then input into the hearth. The exhaust assembly adopts a sliding rod and sealing block matched structure, and a convex block mechanism driven by a rotating pipe drives the sealing block to periodically move, so that gas in the charging barrel is intermittently exhausted through a double-layer filter screen. According to the boiler, the heat efficiency is improved through a smoke-air two-way preheating and particulate matter secondary combustion mechanism, and the biomass preheating, air heating and emission treatment process is optimized.

The invention discloses a calcination and afterburning integrated coal gangue decarbonization device. The coal gangue decarbonization device comprises a shell, a multi-channel pulverized coal combustion gun and a secondary air heating combustor, an air reversing cavity, a combustion cavity and a calcination cavity which are sequentially communicated in the gas flowing direction are formed in the shell, the air reversing cavity is provided with a secondary combustion-supporting air inlet, the combustion cavity is provided with a primary air inlet and a tertiary combustion-supporting air inlet, and the calcination cavity is provided with a coal gangue feeding port. The multi-channel pulverized coal combustion gun is inserted into the primary air inlet, and the secondary air heating combustor is arranged close to the secondary combustion-supporting air inlet. The structure of the coal gangue calcining device is simplified, the problems of material cost, air leakage, heat loss and the like of external equipment and pipelines are reduced, and the construction and operation cost of the coal gangue calcining device is reduced. Meanwhile, through the hot air chamber furnace structure adapting to fine powder combustion and the high-temperature secondary air heating process design, the problems that the low-heating-value coal gangue is difficult to ignite and the heat value cannot be released are solved, and suspension calcination of the low-heating-value coal gangue is achieved.

The utility model discloses an experimental tree shrew breeding observation box with a noise reduction structure, which comprises a horizontally placed support base, a protective cover corresponding to the support base is arranged above the support base, an observation window is fixedly arranged on the outer surface of the front side of the protective cover, a lower baffle is fixedly arranged on the upper surface of the support base, and a noise reduction structure is arranged on the lower baffle. The lower end of the protective cover and the lower baffle are mutually clamped, a ventilation net is fixedly installed on the surface of the front side of the lower baffle, a feeder and a water feeding trough which are fixedly installed on the supporting base are arranged on the inner side of the lower baffle, and a light supplementing lamp is fixedly installed on the inner wall of the upper end of the protective cover. According to the experimental tree shrew breeding observation box with the silencing structure, a novel structural design is adopted, air is conveyed into the movable box through an air inlet pump by utilizing a connecting pipe, the air is heated by utilizing an electric heater in the movable box and then conveyed into a protective cover, and the purpose of adjusting the temperature is achieved by matching with a temperature sensor; therefore, different environment conditions can be simulated.

The invention provides a processing method of a thick plush fabric, and relates to the technical field of textiles. The processing method of the thick plush fabric sequentially comprises the working procedures of weaving, dyeing, post-shaping and napping finishing, and is characterized in that after the working procedure of weaving and before the working procedure of dyeing, an air heating penetrating and beating working procedure is adopted to replace a traditional pre-shaping working procedure; the specific process of the air heating penetrating and flapping procedure is that the fabric is subjected to penetrating and flapping effects of high-speed hot air flow with the flow speed being 30-70 m / s in a loose or low-tension state, and meanwhile the environment temperature is maintained to be 90-170 DEG C. The method can effectively improve the bulkiness, softness and non-deformability of the finished product.

The utility model relates to the technical field of transformers, in particular to a moisture-proof transformer. Comprising a shell assembly, a ventilation assembly, a drying assembly and a mounting assembly, the shell assembly comprises an outer shell and a transformer body, the ventilation assembly comprises a ventilation box, a dustproof plate and a drying plate, the drying assembly comprises a cooling plate, the mounting assembly comprises a mounting bottom plate, and the outer wall of the cooling plate is connected with a heat insulation layer. The end, away from the cooling plate, of the heat insulation layer is connected with a heating piece, the top of the mounting bottom plate is connected with a side plate, and one end of the side plate is connected with a heating rod and a condensation plate. After the fan is started to run, air is filtered by the dustproof plate and then flows to the drying plates, then the air is treated by the two drying plates and then flows into the outer shell, moisture in the air is absorbed by drying the air flowing into the outer shell, and then the air heating effect of the heating rods and the heating pieces is improved.

The utility model discloses a pet padding wood fiber smashing and cleaning device, and belongs to the technical field of pet supplies. The utility model discloses a pet padding wood fiber smashing and cleaning device which comprises a smashing bin and a dust removal bin, the smashing bin is provided with a plurality of bidirectional rotating cutter sets for fully cutting and smashing materials, and a dust removal brush is arranged in an interlayer of the dust removal bin for cleaning a dust removal barrel and further filtering dust. And a material pushing plate is arranged in the dust removal bin to scatter materials. The dust removal brush and the air bin are arranged outside the dust removal barrel, and dust in the dust removal inner barrel is adsorbed into the air bin to be recycled. When the crushed materials are wet, the air heating equipment is started to heat and dry the materials at low temperature, it is ensured that the padding is dry and free of mould or peculiar smell, dust can be effectively reduced, and meanwhile dryness and sanitation of the padding are ensured.

This invention discloses a logic control method for a pneumatic ash conveying system. It is used to monitor and control particulate matter generated by a boiler during the pneumatic ash conveying process. In this process, hot compressed air is heated by an electric heater and then sent into the hopper pump through an ash hopper gasification pipe. This ensures the fluidity of the particulate matter in the ash hopper, facilitating smooth ash removal. Simultaneously, a make-up air valve automatically opens when the pressure in the ash conveying pipe gradually increases to a set opening pressure value, and automatically closes when the conveying pressure is lower than the opening pressure of the make-up air valve. This saves compressed air consumption, improves energy efficiency, reduces overload operation of pipelines and equipment, helps reduce the risk of equipment wear and damage, extends the system's service life, and reduces maintenance and replacement costs.

The invention provides a third-stage compression heat recovery device of a compressed air energy storage power station. The third-stage compression heat recovery device comprises a third compressor, a third-stage cooler, an underground gas storage, a gas storage outlet air heating heater, a first-stage expansion gas-water heat exchanger and a first-stage expansion gas molten salt heat exchanger which are sequentially connected according to the air flowing sequence. In the compression process of the first-stage expansion machine, compression heat after a third-stage compressor is stored in a heat storage tank, in the expansion process, the temperature of compressed air at an outlet of an underground gas storage is increased to the designed temperature through heat stored in the heat storage tank, and then the compressed air is heated through a subsequent first-stage expansion gas-water heat exchanger and a first-stage expansion gas-molten salt heat exchanger; and the air inlet temperature requirement of the expander is met. Compression heat of the third-stage compressor is used for heating air at the outlet of the air storage, the compression heat of the third-stage compressor is reasonably utilized, waste of the heat is avoided, the technical problem that the temperature of the air at the outlet of the underground air storage of the compressed air energy storage power station is too low is solved, and the stability of a subsequent heat storage and exchange system and the power generation efficiency of an expansion machine are ensured.

The utility model relates to the technical field of drying, in particular to a metal powder drying device which comprises a drying charging barrel and a device cover set, the device cover set covers the upper end of the drying charging barrel in a sealing mode, an air inlet pipe is fixedly installed on the lower left side of the drying charging barrel and externally connected with an air heating device, and a pressure relief valve set is fixedly installed on the upper right side of the drying charging barrel. A motor is fixedly installed at the upper end of the device cover set. When the metal powder drying device is used, warm airflow supplies heat to metal powder through the annular cavity and the inclined channel by the aid of the heating device connected into the air inlet pipe, steam in the metal powder is ensured to be evaporated, and the pressure relief valve group is opened for pressure relief to finish drying.

An aerosol-forming device configured to removably receive an aerosol-forming article (20) including an aerosol-forming substrate (23), the aerosol-forming article having a substantially rectangular parallelepiped shape defining two opposing main faces, the device comprising a heating chamber for removably and at least partially receiving the aerosol-forming article, the heating chamber defining an insertion direction and a convective air heater assembly arranged upstream of the heating chamber, the convective air heater including a resistive heater element (71) extending therein, the convective air heater being in fluidic connection with the heating chamber, wherein the convective air heater assembly includes two air heating channels (73) leading from each side of the aerosol-forming device to a central air channel, the central air channel leading fluidically to an air inlet of the aerosol-forming article, wherein the resistive heater element extends through the two air heating channels.

The invention discloses a coal-fired unit power generation system with peak shaving capacity and a peak shaving method, and belongs to the technical field of thermal power generation. The system comprises a coal-fired power generation subsystem, a fused salt heat storage subsystem and a primary air heating subsystem; the coal-fired power generation subsystem comprises a boiler and a steam turbine generator set; the fused salt heat storage subsystem comprises a fused salt steam heat exchanger, a high-temperature fused salt tank, a low-temperature fused salt tank and a fused salt water supply heat exchanger; the primary air heating subsystem comprises a steam air heat exchanger. The peak shaving method comprises the steps that when the coal-fired unit power generation system operates at a low load or reduces the load, main steam exchanges heat with low-temperature fused salt, and part of heat is stored; steam at an outlet of the fused salt steam heat exchanger exchanges heat through the steam-air heat exchanger to reheat primary hot air of the boiler; when the load of the coal-fired unit power generation system rises, heat is released, and feed water is heated through the fused salt feed water heat exchanger. The peak regulation depth of the unit is greatly increased by extracting steam and storing heat and increasing the primary air temperature, and the output and combustion state of the low-load coal mill is improved.

The utility model relates to the technical field of heater, concretely is a kind of heater with intelligent temperature control system, including installation platform and intelligent heater, be equipped with intelligent control module on the intelligent heater, be equipped with heat preservation box on the installation platform, air external mechanism and temperature detection mechanism are equipped on the heat preservation box, heating groove is set up in one side of the heat preservation box, the intelligent heater is located in the heating groove and is equipped with locking mechanism between the installation platform, heating assembly is equipped between the inside of the intelligent heater and the heat preservation box, this structure passes through intelligent control module, system can automatically adjust heating power according to the data of temperature detection mechanism, realize the accurate control to air heating temperature, adopt annular heating tube and conical plate on first heating plate and second heating plate, promote air to flow up by air hole staggered, to increase the contact area and time of air and heating assembly, can guarantee air to be heated evenly.

The utility model discloses a multistage hot air circulation device for titanium concentrate drying, which belongs to the technical field of mineral drying, and is characterized by comprising a working box, the right side of the working box is fixedly connected with a drying mechanism, the left side of the working box is fixedly connected with a circulation mechanism, and the front side of the working box is rotatably connected with a heat insulation door. The drying mechanism feeds hot air from the top and the bottom of the working box through the air inlet pipe and the air expanding hopper, multi-stage hot air heating is achieved, the titanium concentrate can be evenly heated in the working box, the drying uniformity and efficiency are improved, the drying mechanism can be automatically controlled through the PLC, and according to the characteristics and drying requirements of the titanium concentrate, the drying efficiency is improved. The working state of the hot air generator is adjusted, intelligent drying is achieved, the drying quality and the production efficiency are improved, the circulating mechanism can lead out hot air in the working box, the hot air is sent back into the working box after moisture absorption treatment, hot air recycling is achieved, and the energy utilization rate is increased.

The utility model relates to river sand production equipment technical field especially is a kind of river sand cleaning dewatering screening device, including screening bucket support assembly, screening bucket subassembly and dehydration drying assembly, in the utility model, by the rotating gas delivery shaft, stirring rod, air heater, gas delivery disc, exhaust box and exhaust nozzle being set, the device can make screening bucket body vibrate by vibration motor, river sand is stirred by stirring rod, air is heated by air heater simultaneously, hot air is shunted by gas delivery disc and rotating gas delivery shaft, hot air is discharged by exhaust box and exhaust nozzle, river sand is dried and dewatered by the hot air of circulating flow, both can make river sand that is agglomerated due to dampness fast dry, improve the speed of river sand screening, also can make the river sand that originally is accumulated together to dry is dispersed to different screen plate and is constantly turned over, improve the speed of drying and dewatering, this mode is shorter in time, and efficiency is higher.

The invention discloses a dish-washing machine, and relates to the technical field of dish-washing machines, the dish-washing machine comprises a dish-washing machine main body and a heat pump system, the dish-washing machine main body is provided with a washing chamber, an internal circulation air duct and a spraying system, and an air inlet and an air outlet of the internal circulation air duct are both communicated with the washing chamber; the heat pump system comprises a compression device, a switching device, a first heat exchange device, a second heat exchange device, an air cooling device and an air heating device. The compression device, a first heat exchange channel of the first heat exchange device and the second heat exchange device form a first circulation heat exchange loop through the switching device, and the compression device, the air heating device and the air cooling device form a second circulation heat exchange loop through the switching device. The air cooling device and the air heating device are sequentially arranged in the inner circulation air duct in the direction of the air inlet and the air outlet. According to the technical scheme, independent heat exchange parts are used in the washing stage and the drying stage of the dish-washing machine, and the washing and drying efficiency, flexibility and energy utilization rate of the dish-washing machine can be improved.

The utility model discloses an environment-friendly hot air curtain which comprises an air curtain machine shell, a filter frame is arranged on one side of the air curtain machine shell, a coarse filter screen is fixedly connected to one end in the filter frame, a filter plate and an activated carbon plate are slidably connected to the interior of the filter frame, and a motor is fixedly connected to the adjacent side of the air curtain machine shell. A rotating shaft is fixedly connected to the output end of the motor, a centrifugal impeller is fixedly connected to the outer side of the rotating shaft, a heater is fixedly connected to the interior of the air curtain machine shell, the surface temperature of the heater is increased through input hot water, so that the temperature of airflow penetrating through gaps in the heater is increased, hot air is exhausted from an air outlet, and a hot air curtain is generated; hot water sources are more, and hot water for production in a factory can be directly conducted, so that the purpose of saving electricity is achieved, dependence on traditional energy is reduced, air is heated through an electric heating element when heat is insufficient, and the energy utilization efficiency is improved.

The utility model relates to the technical field of dust removal mechanisms, and discloses a magnetization dust removal mechanism for power-saving equipment, which comprises a shell, a power-saving equipment body is arranged in the shell, the magnetization dust removal mechanism also comprises heat dissipation components for heat dissipation of the power-saving equipment body, the heat dissipation components are arranged on two sides of the power-saving equipment body, and the magnetization dust removal mechanism is arranged in the shell. The heat dissipation assembly comprises two supporting bins, the two supporting bins are arranged on the two sides of the power-saving equipment body correspondingly, and through mutual cooperative use of the shell, the power-saving equipment body, the supporting bins, a first heat insulation plate, a first fixing groove, a heat conduction plate, a supporting channel and a heat conduction pipe, the effect of cooling the interior of the shell can be achieved; according to the water circulation device, heat in water flow is absorbed by the semiconductor chilling plate and cooled in the continuous water circulation process, the situation that the cooling effect is poor due to the fact that water is heated by hot air flowing through the heat dissipation opening is avoided, the heat dissipation effect is guaranteed, use is convenient, and the water circulation device is practical.

There is provided a heating device heating a can body with hot air, the heating device including a heating unit configured to generate the hot air, a first heating portion configured to heat the can body to raise a temperature of the can body with the hot air, and a second heating portion configured to heat the can body that has been heated to the raised temperature. At least one of the first heating portion or the second heating portion may include a plurality of heating sections having different heating conditions of the can body.

This invention relates to the field of industrial heating equipment technology, specifically to a high-temperature oven system and its control method that integrates radiant heating and forced-air heating. A bottom heating tube is installed in the working chamber formed by the inner shell, and left and right heating tubes are installed in the air ducts on both sides, forming a heating component that integrates radiant and forced-air functions. A circulating air duct assembly, consisting of a circulating fan, a perforated air duct plate, and outlet / return air ducts, achieves forced circulation of hot air. During the heating phase, all heating tubes are activated for radiant heating to achieve rapid temperature rise. During the constant-temperature phase, the heating tube power is reduced, and the system relies on the circulating fan to drive airflow through the heating tubes in the air duct for circulating heating to maintain temperature uniformity. This effectively balances rapid heating and temperature uniformity, overcoming the inherent defects of a single heating method.

The utility model discloses a microwave hot air coupling heating device. The microwave hot air coupling heating device comprises a box body, a conveying mechanism, a microwave heating mechanism and a hot air heating mechanism, the box body is provided with a feeding hole and a discharging hole; the conveying mechanism is installed in the box body and is configured to convey materials entering the box body from the feeding port to the discharging port to be discharged. The microwave heating mechanism is communicated with the box body and is used for emitting microwaves into the box body; the hot air heating mechanism communicates with the box body and is used for conveying hot air into the box body. According to the microwave hot air coupling heating device, the inside and the outside of the asphalt reclaimed material are simultaneously heated and dehumidified, so that the heating quality of the asphalt reclaimed material is ensured, the mass heat transfer efficiency in the asphalt reclaimed material is improved, and the problems of edge overheating effect and thermal runaway are avoided.

The utility model relates to the technical field of drying equipment, and discloses a heat pump drying machine with a heat pipe heat recovery device, which comprises a base, a heat pump unit and a drying groove are respectively and fixedly arranged on the upper surface of the base, a sealing cover is covered on the top of the drying groove, and an air inlet and an air outlet are respectively arranged on the side wall of the drying groove. And the air outlet is positioned above the air inlet. The heat pump unit is used for heating air flowing in the air supply pipe, hot air enters the drying groove through the air inlet to heat and dry materials, humid and hot air is discharged to the external environment through the air outlet, and when air is discharged, heat in airflow can be transmitted to a medium in the heat recovery circulating pipe, so that the heat recovery circulating pipe is used for recovering the heat in the drying groove. And then the circulating pump drives the medium to flow in the coil pipe, the purpose of preheating air entering the air supply pipe can be achieved, and therefore the air heating effect of the heat pump unit can be improved, and the purpose of saving energy is achieved.

The application discloses a power battery replacement vehicle type power battery deicing system and belongs to the technical field of pure electric vehicles, which comprises: a vehicle controller, which is used for sending a power battery replacement demand instruction to a battery management system; the battery management system, which is used for obtaining the power battery replacement demand instruction and judging whether the vehicle is in a driving state; a support inner wall heating system, which is connected with a power battery replacement station tray air heating system and is used for heating a power battery support; the vehicle controller is further used for obtaining the heating power of a vehicle body heat management system to control the temperature of the support inner wall heating system; a chassis power battery replacement auxiliary deicing structure, which is used for separating an auxiliary power battery support from a power battery during power battery replacement; and the power battery replacement station tray air heating system, which is used for bringing hot air to the automobile chassis part to melt ice and snow during power battery replacement. The application guarantees the normal operation of power battery replacement, greatly improves the power battery replacement efficiency and the power battery replacement success rate in winter.

The utility model provides a kind of baking finish device for baking finish door, including the baking finish chamber unit being equipped with closed cavity and continuous circulation track system, contain multiple along track movement and be equipped with detachable workpiece clamping mechanism's suspension conveying assembly, and contain along internal conveying section interval distribution solidification module's baking finish operation unit, track system is closed loop power track, workpiece clamping mechanism can adapt to different thickness workpiece, baking finish chamber is equipped with gas circulation system, and solidification module is hot air heating equipment.The device realizes efficient continuous production, stable clamping, good environmental control and accurate solidification, improves baking finish door production efficiency and quality.

The present invention discloses a dishwasher and relates to the technical field of dishwashers. The dishwasher includes a dishwasher body and a heat pump system. The dishwasher body has a washing chamber, an internal circulation air duct, and a spraying system. Each of an air inlet and an air outlet of the internal circulation air duct is in communication with the washing chamber. The heat pump system includes a compression device, a switching device, a first heat exchange device, a second heat exchange device, an air cooling device, and an air heating device. The compression device forms a first circulation heat exchange loop with the first heat exchange channel and the second heat exchange device through the switching device. The compression device forms a second circulation heat exchange loop with the air heating device and the air cooling device through the switching device. The air cooling device and the air heating device are sequentially arranged in the internal circulation air duct in a direction from the air inlet to the air outlet. In the present invention, washing and drying efficiency, flexibility, and an energy utilization rate of the dishwasher can be improved by using independent heat exchange component in each of washing and drying stages of the dishwasher.

The invention discloses an integrated liquefied air energy storage system and application thereof, and belongs to the technical field of energy storage. By arranging an air cooling liquefaction storage subsystem, an energy storage stage organic Rankine cycle waste cold utilization subsystem, a liquefied air heating expansion subsystem and an energy release stage organic Rankine cycle waste heat and waste cold utilization subsystem, LNG cold energy and gas turbine exhaust can be subjected to gradient utilization; while the air liquefaction rate and liquefaction rate of the liquefied air energy storage system are improved, the liquefied air energy storage and release system is used for replacing bottom circulation of the gas turbine, so that exhaust waste heat of the gas turbine can be fully utilized, and the system integrating LNG cold energy and exhaust heat energy of the gas turbine is used for replacing a gas turbine combined circulation system; the gas turbine exhaust heat energy in the gas turbine combined cycle is utilized more efficiently, the electric energy output of the system is improved, the system has the functions of power generation, energy storage and waste cold and waste heat utilization at the same time, and the comprehensive performance of traditional gas turbine combined cycle and liquefied air energy storage is expanded.

The utility model discloses a novel variable wind warmer host, including casing, the top of casing bolted with cover plate, the inside of casing is integratedly injection molded with volute hot air bin, the device drives wind wheel to rotate through first motor to generate air flow, cooperates with PTC ceramic heater to heat the air flow, forms stable hot air output, and the heating efficiency is improved. Meanwhile, a third motor is used for driving a swing plate and a swing arm to be linked so as to cooperatively drive an air guide plate to rotate oppositely, under the condition that the power of the first motor is not changed, the air pressure of an air outlet can be changed only through adjustment of a mechanical structure, hot air can cover a longer distance, and the heating range and comfort are remarkably improved; by means of the mechanical air pressure adjusting mode, the problem that energy consumption is increased due to traditional frequency conversion speed regulation is solved, stability of heat output is guaranteed, energy consumption is reduced, and the problem that the air supply distance of a traditional warmer is short is effectively solved while low cost is maintained.

The purpose of the present invention is to provide a blower capable of improving air heating efficiency with a simple structure, and capable of appropriately heating air while suppressing power consumption. To solve the problem, the present invention is provided with: a suction unit (2) that sucks outside air into a housing (1); a heating unit (3) that heats the gas sucked by the suction unit (2); a blow-out unit (4) that discharges the gas heated by the heating unit (3); and a control unit (5) that controls the degree of suction by the suction unit (2) and the degree of heating by the heating unit (3), the heating unit (3) having: a cylindrical body (31), both ends of which face the suction unit (2) and the discharge unit (4); a film heating element (32) that is in contact with the inner peripheral surface of the cylinder (31); and a closing section (33) that closes the inside cross-section of the cylindrical body (31).

Disclosed is a modularly combined production line for a polyimide film, said production line comprising a casting machine, a peeling chamber, and a tenter machine; the tenter machine is formed by connecting and combining tenter box units that can be combined. The tenter box units are divided into ceramic heating subunits or hot-air heating subunits. There are two or more tenter box units, and each tenter box unit comprises at least one ceramic heating subunit and one hot-air heating subunit. According to the present invention, a modular design and configuration are used to achieve remote production and assembly, and facilitate disassembly and mounting. The tenter machine part has tenter box structures that can be freely combined in different forms, particularly allowing flexible use of respective advantageous properties of the ceramic heating subunits and hot-air heating subunits to meet different film requirements, thus fully improving production flexibility and convenience, as well as enhancing the precision of temperature control, thereby better satisfying the production needs of polyimide films and contributing to improved film product quality.

The utility model relates to dental flushing needle bending equipment based on hot air heating, which comprises a base assembly, a needle body fixing device, a hot air heating device and a bending actuating mechanism, and the needle body fixing device comprises a positioning base plate, a supporting vertical plate and a conical joint which are sequentially arranged along the axis direction; the hot air heating device comprises a heating shell, an electric heating element and an air guide pipe set, a plurality of air outlets in different axial directions are formed in the tail end of the air guide pipe set, and the air outlets surround the to-be-bent area of the flushing needle to form an annular hot air curtain. The bending executing mechanism comprises a height adjusting assembly, an angle adjusting assembly and a linear driving device, and a bending forming roller capable of rotating around the axis of the flushing needle is arranged at the telescopic end of the linear driving device. The utility model provides a dental flushing needle bending device based on hot air heating. The problems that an existing dental flushing needle bending device is low in efficiency, poor in precision, insufficient in universality, uneven in heating, prone to damaging a needle body during bending and the like are solved.

A refrigerator comprising a cabinet, a door configured to open and close an opening of the cabinet, and an outside air heat inductor arrangeable inside the door to extend toward the cabinet from a front portion of the door. The outside air heat inductor includes a first heat transfer path forming member configured to transfer outside air heat from outside the refrigerator toward a surface of the cabinet, and a second heat transfer path forming member arrangeable between the first heat transfer path forming member and an inside of the cabinet such that while the second heat transfer path forming member is arranged between the first heat transfer path forming member and the inside of the cabinet, the second heat transfer path forming member receives the outside air heat and prevents cold air within the cabinet from being transferred to the first heat transfer path forming member.