107results about How to "Prevent freezing" patented technology

The utility model discloses a kind of bearing bush cooling devices, it is related to pump station cooling system technical field, including host computer pump cooling unit, bearing bush cooling unit, intelligent control system, the bearing bush cooling unit includes gas-liquid separator, compressor, condenser, liquid accumulator, drying filter, liquid mirror, expansion valve and evaporator sequentially through pipeline connection, form closed refrigeration cycle loop, exhaust pipe on the outlet of compressor is provided with pressure sensor, temperature sensor, pressure controller, the air inlet pipe and exhaust pipe of the compressor are respectively provided with third pressure gauge, the pressure controller is electrically connected with pressure sensor, third pressure gauge, realizes winter system pressure intelligent regulation by pressure controller, not only effectively avoid the equipment failure caused by pressure anomaly, also greatly improve the operation efficiency of system in winter harsh environment, energy saving, ensure equipment operation safety.

This application belongs to the technical field of grouting materials for tunnel engineering, specifically relating to a grouting material suitable for tunnel rock strata reinforcement and its preparation method. It includes component A and component B; by weight, component A comprises: 75-85 parts of a first base material, 10-20 parts of a coupling agent, and 2-5 parts of a catalyst; component B comprises: 70-80 parts of a second base material and 15-25 parts of a modifying accelerator; wherein, the first base material is a water glass solution, and the physicochemical properties of the water glass solution meet the following conditions: modulus > 2.5, Baume degree < 40°Bé; the second base material is composed of isocyanate compounds and glycidyl etheroxypropyl cage-like polysilsesquioxane in a weight ratio of 100:(11-23); the modifying accelerator includes polyvinylpyrrolidone and dicarboxylic acid alkyl ester compounds. The two base materials synergistically cure at low temperature to form a highly cross-linked organic-inorganic composite network, thereby significantly improving the compressive strength of the solidified body.

The utility model relates to the technical field of candle production, in particular to a shaping device for birthday candle production, which comprises a main body, the cooling assembly is arranged in the main body, the cooling assembly comprises a cooling groove, impellers, a fluted disc, a supporting plate, a motor, a main gear, a driven gear and a refrigerating machine, the cooling groove is formed in the top of the main body and is shaped like a Chinese character'hui ', and the impellers are rotationally connected to the left side and the right side of the inner rear wall of the cooling groove correspondingly; the rear end of the impeller extends to the outer side of the main body and is connected with a fluted disc which is rotationally connected with the main body; the cooling assembly is arranged, the refrigerating machine is started to refrigerate water in the cooling tank, the motor is started to drive the main gear to rotate, the main gear rotates to drive the driven gear and the fluted disc on the right side to rotate, the driven gear rotates to drive the fluted disc on the left side to rotate, and therefore the two impellers rotate; water in the cooling tank can flow quickly, and the cooling effect can be improved while the water source is prevented from being frozen.

The utility model relates to a kind of charging base and new energy charging socket with drainage structure, comprising: charging shell, direct current charging module and alternating current charging module, the surface of charging shell is provided with mechanical lock slot, first connecting port and second connecting port;First drain hole and second drain hole are opened on the side wall of mechanical lock slot, first drain hole is communicated with first connecting port, second drain hole is communicated with second connecting port;The end face of mechanical lock slot is provided with multiple drainage channels;The input end of direct current charging module is arranged in first connecting port, the surface of direct current charging module is provided with third drain hole;The input end of alternating current charging module is arranged in second connecting port, the surface of alternating current charging module is provided with fourth drain hole.The utility model can drain the accumulated water in mechanical lock slot by drain hole and drainage channel in mechanical lock slot, prevent the freezing caused by accumulated water in mechanical lock slot during car washing in winter, ensure that mechanical lock can be normally locked, and vehicle can be normally charged.

The invention discloses a cattle farm playground water trough anti-freezing temperature control system based on solar energy storage, and relates to the technical field of livestock breeding equipment, the cattle farm playground water trough anti-freezing temperature control system comprises a solar power generation module, an energy storage management module, a temperature control execution module and an intelligent control module, the solar power generation module is electrically connected with the energy storage management module and the temperature control execution module, and the intelligent control module is electrically connected with the energy storage management module. The energy storage management module is electrically connected with the temperature control execution module and the intelligent control module, and the temperature control execution module is in signal connection with the intelligent control module. Compared with an existing solar heating device lacking a stable energy storage system, the cattle farm playground water trough anti-freezing temperature control system based on solar energy storage stores electric energy through a solar storage battery of the energy storage management module, and the solar energy storage management module stores the electric energy at night or in a scene with insufficient illumination such as cloudy and rainy days; a storage battery power supply mode can be switched through the intelligent control module, continuous operation of the temperature control execution module is guaranteed, freezing of the water trough due to power supply interruption is avoided, and normal water drinking of cattle in winter is guaranteed.

This invention provides a refrigerator, including a cabinet defining a first and second refrigeration compartment arranged in a left-right direction; a refrigeration cavity disposed within the first refrigeration compartment; an air inlet channel disposed between the second refrigeration compartment and the refrigeration cavity; an air outlet assembly disposed within the second refrigeration compartment and spaced from the rear wall of the second refrigeration compartment, the air outlet assembly communicating with the air inlet channel to guide cold air from the refrigeration cavity to the second refrigeration compartment; and a return air channel disposed between the second refrigeration compartment and the refrigeration cavity, with the inlet of the return air channel located between the air outlet assembly and the rear wall of the second refrigeration compartment. The refrigerator of this invention facilitates the flow of cold air towards the bottom of the second refrigeration compartment as much as possible, thereby improving the uniformity of the refrigeration effect within the second refrigeration compartment. Furthermore, when refrigeration is stopped, cold air flow is prevented from reaching food, thus preventing the food from freezing.

The utility model provides a high and cold arid region crop water and fertilizer integrated intelligent fertilizer applicator, which relates to the technical field of agricultural irrigation equipment, and comprises an intelligent fertilizer applicator, the side surface of the intelligent fertilizer applicator is connected with a discharge pipe, one end of the discharge pipe is connected with a pump machine, the side surface of the pump machine is connected with a connecting pipe, one end of the connecting pipe is connected with a spraying pipe, and the other end of the connecting pipe is connected with a water pump. A plurality of nozzles are distributed at the bottom of the spraying pipe, two fixing rings are arranged on the outer side of the spraying pipe, bolts penetrate through the two ends of the fixing rings, nuts are movably arranged on the outer sides of the bolts, and side supporting plates are movably connected to the outer sides of the nuts. The fixing ring is arranged on the outer side of the spraying pipe, the bolt penetrates through one end of the side supporting plate and one end of the fixing ring, by rotating the nut, the nut drives the side supporting plate to ascend and descend, the side supporting plate provides lateral supporting for the fixing ring, the second limiting screws are distributed at the bottom of the side supporting plate, and stable supporting can be provided.

The utility model discloses a kind of water seal type diffusion partition systems, belong to coal gas valve technical field, including diffusion pipe cavity, sealing cavity and gas pipe cavity sequentially communicated from top to bottom, the sealing cavity outside sequentially communicated with inlet pipe, pressure balance pipe and overflow port pipe from top to bottom, the sealing cavity top end is sequentially provided with transmission wheel and auxiliary wheel from left to right, the gas pipe cavity outlet end is located in sealing cavity.This utility model is easy to operate, can be switched to close tightly at any time, when meeting production emergency accident needs diffusion, can carry out fast diffusion operation.

An integrated architecture system for dual-indirect heat pump thermal management in pure electric vehicles based on R290. Currently, most pure electric vehicles have low integration levels in their thermal management systems. Typically, the battery pack circuit and air conditioning circuit are connected in parallel through a heat exchanger, while the motor and electronic control cooling circuit is an independent circuit. This results in too many system components, occupying a large amount of engine compartment space, and lacking a standardized and precise processing structure. In this invention, one end of the radiator is connected to the second refrigeration device, and a first valve body is provided between the radiator and the second four-way valve. The other end of the radiator is a double-ended connection end, which is sequentially connected to one end of the second refrigeration device through the fourth inlet / outlet and the second inlet / outlet of the second four-way valve. A third valve body is provided between the double-ended connection end of the radiator and the second four-way valve. The other end of the second refrigeration device is connected to the first inlet / outlet of the second four-way valve. The double-ended connection end of the radiator is sequentially connected to the fourth inlet / outlet of the second four-way valve through a drive motor, an electronic control unit, and a second water pump.

The utility model discloses a kind of water and fertilizer irrigation equipment of garden nursery stock, belong to garden nursery technical field, including base, water and fertilizer tank is installed in base upper end one side, stirring structure is arranged in water and fertilizer tank inside, irrigation device is installed in base upper end other side, winding structure is set in irrigation device inside lower end, the utility model sets up heat preservation component, make water and fertilizer tank inside lower end install heating box, the electric heating tube in its inside is powered on and generates heat, then pass through heat sink and fin and transfer, water in water and fertilizer tank can be kept at suitable temperature, avoid freezing when irrigation, and vacuum heat insulation board can play heat preservation effect;The utility model sets up cleaning component, make spraying pipe wind when passing through cleaning plate, soft scraper can scrape soil on its surface, sponge brush is further wiped, to play good cleaning effect, and collection box can collect soil and medicine water drop, reduce pollution.

The application provides a liquid nitrogen wetting contact angle measuring device for a super-low-temperature solid surface, comprising a super-low-temperature solid surface cooling assembly, a nitrogen atmosphere protection assembly, a liquid nitrogen titration assembly and a wetting contact angle observation assembly, wherein the super-low-temperature solid surface cooling assembly can make the sample quickly enter and maintain the super-low-temperature state during the test through liquid nitrogen circulation and a silver cooling plate. The nitrogen atmosphere protection assembly discards the commonly used vacuum scheme in engineering and adopts dry nitrogen protection to avoid the rapid gasification of liquid nitrogen under vacuum. The liquid nitrogen titration device realizes the dropping of liquid nitrogen at different heights, supports the related research on wetting contact angle measurement and droplet impact dynamics. The wetting contact angle observation assembly guarantees the observation of the droplet shape under the super-low-temperature environment through a light source plate, a blowing device and the like. The application fills the gap in the research on the wetting and spreading behavior of super-low-temperature fluid on a cooled solid surface and has important value for super-low-temperature fluid lubrication and super-low-temperature fluid transportation.

This utility model provides a fuel dispenser tank level measuring device, belonging to the technical field of fuel tank detection equipment. It includes a sensor module on the upper part of the level gauge body, a measuring tube at the bottom of the sensor module, a connecting rod inside the measuring tube, a detection probe at the lower end of the connecting rod, a heat-insulating jacket on the outer wall of the measuring tube, a detachable heat-insulating tube at the bottom of the measuring tube, a heating ring centrally located on the outer wall of the heat-insulating tube, a heating component inside the heating ring, and a heat tracing component fixedly installed inside the heat-insulating tube. This utility model uses the heat-insulating jacket and heat-insulating pad to keep the oil in the measuring tube warm. Heating is supplied through a heating wire to activate the heating ring, thereby raising the temperature inside the heating ring and thus the wall of the heat-insulating tube, keeping the oil in the heat-insulating tube at a constant temperature. Heat is then evenly transferred inside the heat-insulating tube through a serpentine bend, preventing the detection probe from freezing due to low temperatures, thus stabilizing the measurement accuracy of this level gauge in cold regions.

The application discloses a high-efficiency automobile stamping die cooling water circulating system and belongs to the field of cooling water circulating equipment.The water tank is provided with a pump body fixedly connected to one side of the water tank, a water inlet pipe fixedly connected to the top of the water tank, a water delivery pipe one fixedly connected to the side, away from the water tank, of the pump body, a filtering mechanism arranged on one side of the water delivery pipe one, a water delivery pipe two fixedly connected to the side, away from the filtering mechanism, of the water delivery pipe one, and a cooling pipeline fixedly connected to the side, away from the filtering mechanism, of the water delivery pipe two.The sealing cover is opened to put the corrosion inhibitor into the storage tank, the corrosion inhibitor is stored in the storage tank, the corrosion inhibitor in the storage tank is delivered into the water tank through the conveying pipe, and the opening and closing of the conveying pipe is controlled through the electromagnetic valve.The application avoids the problem that the traditional cooling water circulating system needs manual putting of the corrosion inhibitor by the staff, thereby saving the human resources and improving the practicability.

The invention discloses a supercritical CO2 compressor unloading shutdown system and an operation method thereof. According to a compressor unit, supercharging route sections are arranged in a graded mode to be a transcritical supercharging stage route, a sub-high-pressure supercharging stage route and a highest-pressure supercharging stage route. A bypass system comprising a first bypass pipeline, a second bypass pipeline, a third bypass pipeline, a first bypass valve, a second bypass valve and a third bypass valve is correspondingly arranged, an inlet automatic shut-off valve is arranged at an inlet of the compressor, and an outlet automatic shut-off valve and an outlet check valve are arranged at an outlet of the compressor. An automatic emptying valve is arranged at an emptying port of a compressor and at the downstream of an outlet of a highest pressure boosting stage route, opening and closing of all the valves are intelligently controlled through a central control system in communication connection, unloading shutdown operation of a compressor unit is automatically carried out, stable pressure reduction emptying of high-pressure CO2 with the exhaust pressure ranging from 40 MPa to 50 MPa is achieved, and the pressure of CO2 is reduced. And pipeline freezing and blocking caused by liquefaction and dry ice formation in the supercritical CO2 depressurization process are prevented, and safety and stability in the unloading shutdown process are ensured.

The utility model discloses heat exchange equipment of a circulating water system of a bathing pool, which is arranged on one side of the bathing pool and comprises a shell, a water pump, a titanium cannon, a condenser and a compressor, and the water pump, the titanium cannon, the condenser and the compressor are arranged in the shell. The titanium cannon, the condenser and the compressor are matched with one another to form a heat exchange system, the heat exchange system is connected with the bathing pool based on a connecting pipe, a water pump is arranged on the connecting pipe, and the water pump is used for pumping water to flow to the heat exchange system; the output end of the titanium cannon is provided with a jet device, an output pipe of the jet device is provided with a bypass pipe, one end of the bypass pipe is connected to the output end of the titanium cannon, and the other end of the bypass pipe is connected to the output end of the output pipe. The titanium cannon, the condenser and the compressor are matched with one another to form a heat exchange system, the water temperature of the bathing pool can be adjusted, meanwhile, water flow is increased through the bypass pipe, freezing of a refrigerant fluid pipeline in heat exchange equipment caused by too low temperature is avoided, and normal work of the heat exchange equipment is ensured.

The utility model relates to a cooling tower technical field especially is a kind of windbreak adjusting structure for cooling tower of thermal power plant, including windbreak mechanism and for, windbreak mechanism includes: main component, including the frame of being set in cooling tower air inlet;Execution component, including the vane component of being set in the inside of frame, vane component one end is provided with support rod, and the side of frame is provided with connecting rod, and connecting rod and support rod are hinged;Driving assembly, set in the side of frame and for controlling vane component rotation;The vane component includes the equal interval distribution of several louvers that are rotatably installed in the inside of frame, and the recess is set in the bottom of front end and the top of rear end of louvers, and sealing strip is fixed in recess;Through hand wheel drive worm gear mechanism linkage control louvers synchronous opening and closing, realize air intake accurate regulation, improve cooling efficiency and prevent icing;When closing, sealing strip and fender form double seal, ensure excellent air tightness, adapt to different working condition demand.

This invention relates to the field of gas wellhead control technology, specifically an electric valve for gas production wellheads and its usage method. The former includes a valve body, valve stem, drive assembly, and sealing core assembly, with a valve cavity within the valve body. This invention features a reasonable and compact structure. By setting a primary valve seat and a secondary valve seat, the electric valve for gas production wellheads can achieve different adjustment functions at different stages during the adjustment process. During well opening and closing, it can achieve precise control of the wellhead flow rate, preventing the valve and pipeline from freezing due to reduced flow caused by excessive valve opening. Furthermore, it can adjust the opening of the electric valve for gas production wellheads based on downstream pressure or flow rate during production, making adjustment more convenient. During intermittent production of the gas well, when the gas well's production capacity and liquid carrying capacity are low, the drive assembly can periodically move the valve stem downwards to close the valve, thereby achieving intermittent production and improving the gas well's productivity.

The invention provides a hydrogen-suitable exhaust nozzle integrated heat regenerator, and relates to the technical field of high-end equipment manufacturing, and the hydrogen-suitable exhaust nozzle integrated heat regenerator comprises an exhaust nozzle forming a fuel gas flow channel; the gradient double-path heat return channel is embedded between the outer wall surface and the inner wall surface of the exhaust nozzle, is integrally formed with the exhaust nozzle, and is used for circulating a hydrogen medium to absorb gas heat; the gradually-changed double-path heat return channel comprises a hydrogen conveying pipe and a hydrogen return pipe which are used for inputting and outputting a hydrogen medium, a plurality of runway-shaped flow channels arranged at intervals in the axial direction and a plurality of confluence channels, each flow channel is provided with an arc-shaped channel extending in the circumferential direction, each confluence channel is connected between every two adjacent runway-shaped flow channels, and each confluence channel is communicated with the corresponding runway-shaped flow channel. And after the hydrogen medium flows in from one runway-shaped flow channel, the hydrogen medium is divided into two branches which reversely flow through the arc-shaped channels on the two sides respectively, and then enters the next runway-shaped flow channel after being converged by the converging channel, so that a double-path roundabout flow path is formed. According to the liquid hydrogen heat recovery device, efficient recovery of fuel gas heat in the flowing process of liquid hydrogen is achieved through the gradually-changed double-path heat recovery channel and the reinforced fin structure.

This utility model relates to the field of camera protection technology, and in particular to a fully sealed and waterproof camera protection structure, comprising a housing, a connecting shaft, a mounting sleeve, a drive assembly, and a spiral arm. A camera is mounted on the inner end of the housing. The connecting shaft is rotatably connected to the end of the housing, and a connector is fixedly connected to the outer end of the housing. An internal gear ring is fixedly connected to the inner wall of the mounting sleeve, which is rotatably connected to the connector. The drive assembly drives the internal gear ring to rotate. In this utility model, the drive assembly rotates the spiral arm, causing heating lamps on the spiral arm to heat the camera lens from all directions, evaporating snow and water from the lens surface and preventing icing. Compared to traditional cameras, this effectively copes with extreme weather, ensuring the camera lens surface remains dry and preventing blurry monitoring images due to snow and water freezing, significantly improving monitoring performance.

The utility model discloses a special multifunctional refrigerator for inspecting quality control products, which relates to the technical field of refrigerators, and comprises a refrigerator main body, a refrigerator cover and a control box, the transverse grooves are formed in the refrigerator main body; the storage rack is located in the transverse groove, and the upper surface of the storage rack inclines towards the interior of the refrigerator body and is used for liquid diversion; the flow guide groove is formed in the upper surface of the storage rack; the positioning plate is fixed at the central position of the rear side of the storage rack and is used for positioning the storage rack; according to the scheme, the liquid accumulation box can be used for storing liquid, the positioning plate on the storage rack penetrates through one side of the liquid accumulation box and extends into the liquid accumulation box, the top of the flow guide plate protrudes upwards, the topmost part of the flow guide plate is flush with the bottom wall of the flow guide opening, the liquid is guided to the two sides of the liquid accumulation box, the liquid can be prevented from freezing at the position where the positioning plate is located in the liquid accumulation box, and the liquid moves to the two sides in the liquid accumulation box; and the liquid storage capacity of the liquid accumulation box is improved.

This invention discloses a thermal energy storage system for pumping large-flow-rate high-temperature molten salt, relating to the fields of solar thermal power generation, nuclear power, and thermal power energy storage. It includes a main molten salt storage tank, a stabilizing tank, a horizontal storage tank, a main circulating molten salt pump, and a salt-reducing temperature-regulating pump. The main molten salt storage tank is connected to the stabilizing tank via multiple pipelines. The outlet of the stabilizing tank is directly connected to the suction inlet of the main circulating molten salt pump via a pipeline equipped with an isolation valve and an air cooler, stabilizing the pump suction flow and enabling large-flow-rate molten salt pumping. The arrangement of one or more pipelines between the main molten salt storage tank and the stabilizing tank reduces the height of unusable molten salt in the main molten salt storage tank, saving costs. An air cooler is installed after the stabilizing tank to ensure safe isolation during isolation valve maintenance. This invention addresses the need for pumping large-flow-rate high-temperature molten salt in solar thermal power plants or nuclear power plants of 350MW or above, while also adapting to the requirements of long-term, uninterrupted low-speed pump operation.

The utility model relates to a cloth bag dust removal air pressure balance tank for aluminum particle production, which comprises an air pressure balance tank body, and is technically characterized in that an upper heating component and a lower heating component are arranged on the peripheral wall of the air pressure balance tank body at intervals; the heating assembly comprises two arc-shaped hollow clamping hoops, a bolt pair connected between the two arc-shaped hollow clamping hoops, a plurality of heating rods arranged along the upper surfaces of the arc-shaped hollow clamping hoops at intervals, cushion layers arranged on the inner arc surfaces of the arc-shaped hollow clamping hoops and heat storage media located in the arc-shaped hollow clamping hoops, and the heating rods are longitudinally inserted into the arc-shaped hollow clamping hoops from the upper surfaces of the arc-shaped hollow clamping hoops; a temperature sensor is arranged on a gas outlet pipeline of the gas pressure balance tank body, a gas supplementing pipeline is arranged on the side of the top of the gas pressure balance tank body, the outer end of the gas supplementing pipeline is connected with an outlet of a dryer, and an inlet of the dryer is connected with a nitrogen feeding pipeline. According to the utility model, the problem that the interior of the tank body is iced under the condition of extremely low temperature is solved, and the pressure regulating function is ensured, so that the normal operation of an aluminum particle production system is ensured.

The invention relates to a gas-liquid separation device. This gas-liquid separation device is provided with: a housing; a gas introduction port that opens in the housing and introduces gas from the stack; a gas-liquid separation unit that is disposed in the housing and separates water from the gas; a gas lead-out port which is opened in the housing and leads out separated gas after the water is separated; an exhaust port which is separated from the gas lead-out port, is opened in the housing, and can discharge a part of the separated gas; an exhaust valve provided downstream of the exhaust port in the flow direction of the separated gas; and a heating unit that heats the separated gas flowing from the inside of the housing to the exhaust port.

The utility model discloses an air cooler with a water pan adopting a graphene electrothermal film. An air cooler with a water pan adopting a graphene electrothermal film comprises an air cooler body, the water pan and a graphene heating mechanism embedded in the water pan. A controller is mounted on one side of the water pan; the graphene heating mechanism comprises a supporting plate, a graphene electrothermal film is installed on the top of the supporting plate, a power line is installed on one side of the graphene electrothermal film, the far end of the power line is connected with the controller in an inserted mode, a temperature sensor is installed on the graphene electrothermal film, and the temperature sensor is connected with the controller. According to the air cooler with the water pan adopting the graphene electrothermal film, the graphene heating mechanism comprising the supporting plate, the graphene electrothermal film and the temperature sensor is embedded in the water pan, the water pan can be conveniently heated, icing is prevented, normal operation of the air cooler is facilitated, and more energy is saved.

The utility model relates to mechanical equipment field discloses a cooling water spraying device for styrene storage tank, including the jar body, the outer wall fixedly connected with fixed block of jar body, the inner wall fixedly connected with the direct current pipe of fixed block, the top fixedly connected with ring pipe of direct current pipe, the inner wall fixedly connected with a plurality of spraying mechanism of ring pipe, the outer wall fixedly connected with a plurality of support of jar body, the outer wall fixedly connected with strengthening mechanism of jar body, the spraying mechanism includes the connecting pipe, the outer wall fixedly connected in the inner wall of ring pipe of connecting pipe, the bottom fixedly connected with the base of connecting pipe, in the utility model, through the motor of starting the inner wall of sliding block, motor drive force drives gear to rotate, under the cooperation of inner and outer rack plate of the inner wall of base, gear rotation drives sliding block to move in the base, and connecting column and connecting plate cooperate transmission force.

The invention relates to a charging socket (1) of an electric or hybrid vehicle (9) for connection to a charging plug (11), a kit and an electric or hybrid vehicle (9) with a charging socket (1) according to the invention. The prior art solutions have the problem that after completion of the charging process, the charging socket (1) with the plugged-in charging plug (11) may ice up. The present invention can prevent such icing or remove existing icing by providing the charging socket (1) with at least one heating module shaft (17) configured to receive a heating module (19). In a kit, a charging socket can be equipped with any number of heating modules (19). The electric or hybrid vehicle (9) according to the invention has a charging socket (1) according to the invention.

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.

The application provides a defrosting and anti-freezing system of a heat pump heating unit and the heat pump heating unit. The defrosting and anti-freezing system comprises a main control board, a water collecting tray, an ambient temperature sensor and an in-tray temperature sensor. The in-tray temperature sensor is arranged on the inner side of the water collecting tray, and the main control board is electrically connected with the ambient temperature sensor and the in-tray temperature sensor. The water collecting tray is provided with a drain hole, and the outer side of the water collecting tray is provided with an electric heating belt which is electrically connected with the main control board. The outer side of the electric heating belt is further provided with a heat preservation layer. When the heat pump heating unit enters the defrosting mode, and the ambient temperature is lower than a first set temperature and higher than a second set temperature, the main control board is used for starting the electric heating belt, and when the temperature of the water collecting tray is higher than a third set temperature and lasts for a first set time, the main control board is used for controlling the electric heating belt to stop, so that the electric heating time can be reduced while ensuring that the water collecting tray avoids icing and smooth drainage, and energy saving and power saving are realized.

The invention belongs to the technical field of associated gas condensate recovery, and particularly relates to a skid-mounted crude oil associated gas condensate recovery system and a recovery method. The recycling system comprises a skid seat, an equipment body arranged on the skid seat, a secondary liquid separation device and a condensate liquid recycling device, the equipment body comprises a gas-liquid separation device, a liquid separation bag is arranged at one end of the equipment body, an outlet of the liquid separation bag is communicated with an air cooling device, an outlet of the air cooling device is communicated with the secondary liquid separation device, and the equipment body is communicated with an external conveying pipeline; the secondary liquid separation device is arranged at the top of the equipment body and is provided with a partition plate at the lower part. The equipment body and the secondary liquid separation device are separated by the partition plate to form two independent pressure containers, mutual pressure interference is avoided, condensate liquid is collected to a liquid storage tank in the condensate liquid recovery device and then is directly conveyed to an external conveying pipeline through a pump, closed gathering and conveying are achieved, and the energy-saving and environment-friendly effect is achieved. The problems that the associated gas condensate of skid-mounted crude oil pressurizing output equipment is difficult to recover and cannot be conveyed to an output pipeline under pressure are solved.

The present application relates to the technical field of smelting, in particular to a vacuum induction smelting method, device and smelting furnace. The method comprises the following steps: obtaining an initial liquid level in a crucible unit; based on the initial liquid level being less than a first preset height, swinging the crucible unit to an inclined posture; based on the crucible unit being in the inclined posture, vertically feeding a material rod into the crucible body; based on the material rod in the crucible body being vertically arranged, swinging the crucible unit to a vertical posture, so that the material rod in the crucible body is inclined away from the side of the crucible nozzle. In this way, the problem that smelting liquid droplets adhere to the liquid surface or the wall surface of the crucible body and then quickly condense and form a solidification layer, which promotes the formation of a crust on the liquid surface, reduces the effective liquid surface, and hinders heat transfer, is solved.