45results about How to "Increase subcooling" patented technology

The utility model discloses an air-cooled heat pump evaporation spraying system controlled by supercooling degree, which comprises a refrigerating system and a spraying system, and an atomizing nozzle of the spraying system is aligned with a condenser of the refrigerating system. The spraying system comprises a water storage tank, an electronic water treatment instrument, a constant pressure pump, a countercurrent heat exchanger A, a countercurrent heat exchanger B and an atomizing nozzle which are sequentially connected with a water outlet of the water storage tank through a pipeline, an outdoor environment temperature sensor, and an exhaust temperature sensor mounted on an exhaust port pipeline of the compressor; the upstream temperature sensor and the pressure sensor are installed on a pipeline in front of the electronic expansion valve, and the constant pressure pump, the environment temperature sensor, the exhaust temperature sensor, the upstream temperature sensor and the pressure sensor are electrically connected with the controller and are monitored and controlled by the controller. By means of the mode, whether spraying is needed or not is determined according to the degree of supercooling, and the condensation area and the evaporation area of a refrigerating system are increased.

The utility model relates to a fresh air refrigerating machine with an efficient condensation heat dissipation function. The fresh air refrigerating machine comprises a refrigerant circulation flow path, a fresh air flow path and a condensation heat dissipation air flow path. The refrigerant circulating flow path comprises a first refrigerant circulating flow path and a second refrigerant circulating flow path; the first refrigerant circulating flow path comprises a first compressor, a condenser refrigerant channel first module, a first throttling element and a refrigerant channel of a first evaporator; the second refrigerant circulating flow path comprises a second compressor, a condenser refrigerant channel second module, a second throttling element and a refrigerant channel of a second evaporator; condensation heat dissipation air flow paths are symmetrically distributed on the two sides, and four condensers distributed in a staggered mode are arranged on the condensation side of the fresh air refrigerating machine. Compared with the prior art, the efficient condensation heat dissipation mode is adopted, the four heat exchangers are arranged on the condensation side and are ingeniously arranged and reasonably distributed to the two refrigerant circulation loops, and better heat exchange matching of the refrigerant side and the air side is achieved.

The invention discloses an aluminum alloy strip for battery case production and a preparation method thereof, and relates to the technical field of aluminum alloy processing, and the aluminum alloy strip comprises the following components in parts by weight: 75-95 parts of aluminum, 2-4 parts of silicon, 0.35-0.55 part of magnesium, 0.3-0.5 part of manganese, 1.30-1.80 parts of copper, 0.30-0.70 part of zinc, 0.20-0.50 part of titanium, 0.20-0.45 part of strontium, 0.35-0.65 part of rare earth elements and inevitable impurity elements. According to the aluminum alloy strip for producing the battery shell and the preparation method of the aluminum alloy strip, the components of the aluminum alloy are reasonably adjusted, so that the components of the aluminum alloy are more reasonable, and the produced aluminum alloy strip has the characteristics of high strength, high heat dissipation speed and corrosion resistance, can meet the use requirements of a lithium battery, and is good in use effect and high in practicability. Good use prospects are realized.

The invention discloses a method for preparing an Al-Zn-Mg-Cu aluminum alloy free forging, which comprises sequentially subjecting an Al-Zn-Mg-Cu aluminum alloy ingot after homogenization to variable temperature forging, solution treatment, cryogenic treatment, cold compression treatment and aging treatment. The method can improve the differences in the transverse, longitudinal and high-direction properties of high-strength aluminum alloy free forgings by introducing variable temperature forging technology and combining cryogenic treatment during the forging process, and has the advantages of simple operation and wide applicability.

The present invention discloses a refrigeration system, a defrost control method and a refrigeration device. The refrigeration system includes: a compressor, a condenser and an evaporator group forming a refrigeration cycle loop, and the evaporator group is composed of at least two evaporators arranged in parallel. The refrigeration system also includes: a regenerator forming a heat recovery defrost loop with the compressor and the evaporator group, the first heat exchange pipeline of the regenerator is connected to the refrigeration cycle loop, and the refrigerant flowing out of the condenser can be sent to the evaporator through the first heat exchange pipeline of the regenerator; the second heat exchange pipeline of the regenerator is connected to the heat recovery defrost loop, and the refrigerant flowing out of the evaporator after defrosting can be sent back to the compressor through the second heat exchange pipeline of the regenerator; each evaporator can be independently switched to connect to the refrigeration cycle loop or the heat recovery defrost loop. The present invention ensures that defrosting is carried out normally while improving the supercooling degree of the refrigerant, avoiding the "liquid hammer" phenomenon and ensuring the normal flow and circulation of the refrigerant liquid after defrosting and condensation.

The utility model provides a temperature control system of a water source heat pump, which comprises a water source heat exchanger, a water flow channel, a condenser, an evaporator, a temperature sensor, a temperature sensor and a temperature sensor, and is characterized in that the water source heat exchanger is provided with a medium channel and a water flow channel; the first throttling device and the first electromagnetic valve are arranged between the condenser and the water source heat exchanger in parallel; the second flow control module comprises a second throttling device and a second electromagnetic valve, and the second throttling device and the second electromagnetic valve are arranged between the compressor and the water source heat exchanger in parallel; one end of the second electromagnetic valve is communicated with a medium channel of the water source heat exchanger; and one end of the second throttling device is communicated with the medium channel of the water source heat exchanger, and the other end is communicated with the evaporator. According to the scheme, the modes of the unit can be rapidly switched, and temperature control can be improved.

The utility model discloses an efficient integrated shell-and-tube heat exchanger which comprises a vertically-arranged barrel and a heat exchange tube, one end of the barrel comprises a tube pass inlet and a shell pass outlet, and the other end of the barrel comprises a tube pass outlet and a shell pass inlet. The heat exchange tube is connected in the cylinder body, the heat exchange tube comprises a straight tube part and a winding tube part which are sequentially connected in series, the straight tube part is positioned at the upper part, and the winding tube part is positioned at the lower part of the straight tube part. The heat exchanger has the beneficial effects that the thermal stress of pipes in the heat exchanger can be released, so that the heat exchanger is protected; the equipment size is reduced, the heat exchange efficiency is improved, and the adaptability is high.

The present application relates to the technical field of rail production process, in particular to a production method for improving wear resistance of channel rail for tram. After universal rolling, compressed air is applied to the channel rail for forced cooling in parts. In the first stage, supersonic air jet cooling is applied to the rail head tread, rail head running edge, rail head left side, rail lip and rail bottom to control the cooling speed of each part. In the second stage, supersonic air jet cooling is continuously applied to each part of the rail to control the cooling speed of each part. In the third stage, subsonic air jet cooling is applied to each part of the rail to control the cooling speed of each part, and then the rail is naturally cooled in air. The quenching effect of the channel rail tread and running edge is improved, the pearlite interlamellar spacing is refined, the rail strength and hardness are improved, and the channel rail has good wear resistance.

The present invention relates to the technical field of refrigeration cycle, and specifically to a refrigeration system and circulation method for realizing low-temperature refrigeration, wherein the refrigeration system comprises a high-temperature cycle system and a low-temperature cycle system, wherein the high-temperature cycle system comprises a high-temperature low-pressure compressor, a high-temperature high-pressure compressor, a high-temperature condenser, a high-temperature intermediate cooler, a high-temperature low-pressure economizer and a condensing evaporator connected in series in sequence, wherein the high-temperature intermediate cooler is connected to the pipeline between the high-temperature low-pressure compressor and the high-temperature high-pressure compressor through a pipeline, and the high-temperature low-pressure economizer is connected to the high-temperature low-pressure compressor through a pipeline; and the low-temperature cycle system comprises an evaporator, a regenerator, a low-temperature low-pressure compressor, a low-temperature high-pressure compressor, a condensing evaporator and a liquid storage device connected in series, wherein the outlet of the liquid storage device is connected to the regenerator, and the regenerator is connected to the evaporator through a pipeline, so that the refrigerant circulates and refrigerates in a subcritical state, thereby improving the refrigeration efficiency.

The invention provides a preparation method of a high-performance aging-free high-carbon SWRH82B hot-rolled wire rod, and relates to the technical field of hot rolling, and the preparation method comprises the following steps: feeding a high-carbon SWRH82B steel billet into a heating furnace for heating; carrying out rough rolling on the heated high-carbon SWRH82B steel billet by adopting a large square billet large compression ratio rolling technology under heavy pressure; the high-carbon SWRH82B steel billet subjected to rough rolling is fed into a finishing mill to be subjected to finish rolling; the wire rod obtained after finish rolling is fed into an ultra-long air cooling line to be cooled through ultra-large air volume; the cooled wire rod is fed into a coiling device to be coiled; and the coiled wire rod is inspected and packaged, the high-performance aging-free high-carbon SWRH82B hot-rolled wire rod is obtained, a 134m ultra-long air cooling line and a 280000m / h ultra-large air volume fan are adopted for an ultra-long air cooling line, the cooling speed is increased, and therefore the supercooling degree of austenite is increased, nucleation of ferrite is promoted, ferrite grains are refined, pearlite is refined, and the high-performance aging-free high-carbon SWRH82B hot-rolled wire rod is obtained. And the lamellar spacing of pearlite and the thickness of cementite are reduced, so that the structure is easily converted into sorbite, and the product strength and the performance stability of the same circle are improved.

The invention discloses a high-strength corrosion-resistant aluminum alloy material for an aerosol can and a preparation method of the high-strength corrosion-resistant aluminum alloy material, and relates to the technical field of aerosol can materials. 1.2 wt% to 1.5 wt% of N ; the content of Mo is 0.02 to 0.03 percent by weight; 1.2 wt% to 1.6 wt% of S ; 0.6 wt% to 1.2 wt% of Mg; 1.2 wt% to 1.8 wt% of Cu; 0.05 wt% to 0.08 wt% of T ; 0.10 wt% to 0.15 wt% of Cr; re; and the balance of A l; according to the aluminum alloy material, all the components of the aluminum alloy material are greatly adjusted, and a more suitable component dosage ratio is adopted, so that the prepared aluminum alloy material not only has higher strength performance, but also has excellent corrosion resistance, and can be better suitable for being used in aerosol cans.

The invention provides a heat management system, an energy storage container and a control method of the heat management system.The heat management system is used for conducting heat exchange on a battery and comprises a refrigerant loop, and the refrigerant loop comprises a compressor, a first heat exchanger, a throttling element, a second heat exchanger, a third heat exchanger and a multi-way valve which are sequentially connected; the third heat exchanger comprises a first heat exchange part and a second heat exchange part exchanging heat with the first heat exchange part, the first heat exchange part is arranged between the first heat exchanger and the throttling element, and the second heat exchange part is arranged between the second heat exchanger and the compressor; the multi-way valve is connected with an outlet of the compressor, the first heat exchanger, the first heat exchange part, an inlet of the compressor and the second heat exchange part, and the working states of the first heat exchanger and the second heat exchanger can be switched. In the refrigeration mode, the supercooling degree of the refrigerant flowing through the first heat exchange part is increased, so that the dryness of the refrigerant flowing through the throttling element and flowing to the second heat exchanger is smaller, and uniform temperature of a plurality of battery cells in the battery is ensured.

This invention provides a method for preparing tensile specimens of CoFeNi medium-entropy alloy under deep supercooling conditions. The deep supercooling process of this method is carried out using a high-frequency induction heating device and a combination of melt immersion and cyclic superheating. During the melting process, the alloy raw materials are placed sequentially in a quartz crucible from bottom to top according to their melting points, with glass cleaning agents added to the bottom and top layers. During melting, the vertical movement of the quartz crucible along the central axis of the high-frequency induction coil and the heating temperature of the high-frequency induction coil are controlled to sequentially melt and coat the alloy surface with the glass cleaning agent, melt the Ni metal raw material, and melt the remaining metal raw materials. After the alloy liquid is thoroughly mixed, it is cooled and solidified. This heating and cooling solidification process is repeated until a supercooling of 205K is achieved, producing a CoFeNi medium-entropy alloy ingot that meets the dimensions required for tensile testing. This invention features an easily controllable solidification process, mature technology, and minimal component loss.

The invention discloses an effective refining method for a multi-phase structure of a weldable Ni3Al-based alloy, and belongs to the technical field of nickel-based alloy multi-phase structure regulation and control. The method comprises the following specific steps: carrying out laser remelting treatment on the weldable Ni3Al-based alloy at the speed of 1500-4500W-10mm / s by using an SMATLas Series 5M-6000W (China) type optical fiber laser generator, so that the structure of the weldable Ni3Al-based alloy is refined to a greater extent; the weldable Ni3Al-based alloy subjected to remelting treatment is placed in a high-temperature heat treatment furnace to be subjected to high-temperature aging treatment at the temperature of 940-1020 DEG C for 500 h; thermal stress after laser remelting is eliminated; carrying out furnace cooling treatment on the weldable Ni3Al-based alloy subjected to heat treatment; and finally, the weldable Ni3Al-based alloy with effectively refined multi-phase structures and excellent high-temperature mechanical properties is obtained. According to the weldable Ni3Al-based alloy prepared through the method, the beta phase size in a multi-phase structure is small, the shape tends to be nearly spherical and is evenly distributed, and the high-temperature mechanical property is remarkably improved.

The present invention discloses a refrigeration system, a control method and a refrigerated vehicle for a refrigerated vehicle. The refrigeration system includes a cold storage plate and a refrigeration unit. The cold storage plate is provided with a first evaporator and a first heat exchanger. The first heat exchanger, a circulating pump and a second heat exchanger form a cold release circuit through a refrigerant. The refrigeration system includes a first evaporator and a second evaporator. A second throttle valve is provided between the two. A branch is led out from the front end of the second throttle valve, on which a cold charging solenoid valve is provided. The outlet of the branch merges with the outlet pipe of the second evaporator. The present invention connects the refrigeration circuit and the cold release circuit together through a cold storage plate, which can not only meet the temperature requirements of the refrigerated vehicle for transporting different goods, but also improve the cruising range of the refrigerated vehicle.

The invention discloses a method and device for conducting secondary cooling through kitchen air conditioner condensate water and belongs to the technical field of air conditioners, and the method comprises the steps that (1) a compression refrigeration system and an air supply system are started, and the condensate water drips to a condensate water disc; (2) a water pump is started at the same time, and condensate water of a condensate water disc is pumped to a condenser water inlet pipe of the subcooler; (3) the condensate water enters a subcooler and flows back to a loop of the compression refrigeration system, and the refrigerant which flows out of the water-cooling condenser and is cooled for the first time is cooled for the second time; (4) the condensate water flows out from a condensate water outlet pipe of the subcooler after secondary cooling of the refrigerant is completed; and (5) the condensate water is continuously discharged outdoors under the action of the water pump. The system has the beneficial effects that energy is saved, and innocent waste of a cold water source and energy is avoided.

This invention discloses a method for refining primary silicon in Al-Si alloys through synergistic modification with nano-ceramics based on laser additive manufacturing. The method involves uniformly mixing Al-Si alloy powder with TiB2 and Al2O3 nano-ceramics using a ball mill under inert gas protection to obtain a ceramic-reinforced nano-Al-Si alloy composite powder. This nano-ceramic-modified Al-Si alloy powder is then melted and solidified layer by layer using a laser powder bed melting and forming equipment to create the desired target part. In this method, during the solidification of the nano-ceramic-reinforced Al-Si alloy melt, Al2O3 nanoparticles, due to their similarity to the Si crystal structure and the existence of a good interfacial coherence relationship, act as heterogeneous nucleation sites for primary silicon, increasing the nucleation rate and refining the size of primary silicon. TiB2 nanoparticles, distributed at the solid-liquid interface, can to a certain extent prevent the diffusion and aggregation of Si atoms into Si-Si atom clusters, thereby inhibiting the growth of the primary silicon phase, promoting the regularization of the primary silicon morphology and refining its size, and effectively reducing matrix grain size, significantly improving the mechanical properties of the Al-Si alloy.

The embodiment of the invention provides a supercooling degree control method and device, a storage medium and refrigeration equipment, under the condition that the supercooling degree of an inlet of a fluorine pump is smaller than a first preset supercooling degree, a flow regulating valve arranged on a bypass pipeline is opened to a preset opening degree, and the bypass pipeline is used for connecting an outlet and the inlet of the fluorine pump; after the flow regulating valve is opened at the preset opening degree for the preset duration, whether the supercooling degree of a fluorine pump mixing inlet located between the fluorine pump and the inlet is larger than or equal to the first preset supercooling degree or not is judged; if not, the target bypass flow of the refrigerant is determined, the target opening degree of the flow adjusting valve corresponding to the target bypass flow is determined according to a preset mapping relation, and the preset mapping relation comprises multiple bypass flows and the opening degree of the flow adjusting valve corresponding to the bypass flows; and the flow adjusting valve is opened to the target opening degree, the flow adjusting valve opening degree corresponding to the bypass flow needing to be adjusted is obtained through the preset mapping relation, the supercooling degree adjusting time is saved, and the running reliability of the fluorine pump is ensured.

This invention provides a regenerative reverse Rankine cycle dual high-temperature heat pump system. The heat pump system includes: a first heat exchanger, a first compressor, a first regenerator, a second heat exchanger, and a first expansion valve. The first heat exchanger is connected to the first compressor via the first regenerator. The second heat exchanger is connected to the first compressor. The first expansion valve is connected to the first heat exchanger, and the second heat exchanger is connected to the first expansion valve via the first regenerator. By setting up the first regenerator, heat exchange is performed between the working fluid before throttling and before compression, thereby increasing the subcooling before throttling and significantly reducing throttling losses. At the same time, increasing the superheat at the outlet of the first heat exchanger avoids the damage to the compressor caused by wet compression due to ultra-high temperature dry working fluid, which helps to ensure the service life and high reliability of system components.

The utility model provides a cascade type high-temperature heat pump system which comprises a first-stage heat pump system, a second-stage heat pump system and a water supply system, the first-stage heat pump system comprises an enthalpy spraying compressor, a four-way valve, a first-stage heat exchanger, an evaporation assembly, a first-stage throttler and a separator, and the enthalpy spraying compressor is provided with an exhaust port, an air return port and an enthalpy spraying port. The evaporation assembly comprises a fin type heat exchanger with a fan, the fin type heat exchanger is provided with a supercooling heat exchanger, and an exhaust port of an enthalpy spraying compressor, a four-way valve, a first-stage heat exchanger, a first-stage throttler, the fin type heat exchanger, a separator and an air return port of the enthalpy spraying compressor are communicated and form a first-stage refrigerant circulation main path. And enthalpy spraying openings of the first-stage heat exchanger, the supercooling heat exchanger and the enthalpy spraying compressor are communicated and form an air suction loop. The environment sensible heat is fully utilized for heat exchange, the preheating effect is remarkable, a traditional electric auxiliary heating mode is replaced, the energy utilization rate is increased, the use cost is reduced, meanwhile, freezing and icing are effectively prevented, and the device is suitable for being used in the ultralow-temperature environment.

The invention discloses a method for refining 316L stainless steel grains based on a selective laser melting technology, and belongs to the technical field of metal material additive manufacturing. According to the method, Fe-C-B alloy powder is added, a Fe-B or Fe-B-Cr type compound is formed to serve as a heterogeneous nucleation core when the 316L stainless steel component is manufactured through selective laser melting, columnar crystal epitaxial growth is inhibited, and grain refinement is achieved. By means of the synergistic effect formed by Fe, C and B, the negative influence of the SLM technology on the 316L stainless steel forming process is avoided, the advantages of the SLM technology are fully exerted in the 316L stainless steel component forming process, accordingly, the 316L stainless steel component high in compactness and excellent in comprehensive performance can be formed only through SLM, the method is stable in process, low in crack sensitivity and high in yield, and the production cost is reduced. The method has remarkable advantages in the field of additive manufacturing of high-performance 316L stainless steel components.

An air-source heat pump system includes a compressor, a four-way reversing valve, a throttling device, an outdoor heat exchanger, outdoor piping, a distributor, a water-side heat exchanger, a first check valve, a second check valve, and a third check valve. The outdoor piping is connected to the four-way reversing valve and the throttling device, and is also connected to the cooling ends of the top, middle, and bottom heat exchange units. The heating ends of the top, middle, and bottom heat exchange units are connected to the branch interface pipe, and the main interface pipe is connected to the outdoor piping and the throttling device. The second and third check valves are located on the outdoor piping; the liquid outlet of the second check valve is connected to the throttling device, and the outdoor piping between the bottom heat exchange unit and the second and third check valves is connected. The liquid outlet of the first check valve is connected to the main interface pipe, and its liquid inlet is connected to the piping between the second check valve and the throttling device. During heating, the system improves the heat exchange efficiency of the outdoor heat exchanger; during cooling, it improves the subcooling.

The utility model provides a direct-current variable-frequency high-temperature heat pump system which comprises a first-stage heat pump system, a second-stage heat pump system and a water supply system which is respectively connected with the first-stage heat pump system and the second-stage heat pump system. An intermediate heat exchanger capable of overlapping the first-stage heat pump system and the second-stage heat pump system and enabling heat absorbed by the first-stage heat pump system to be transmitted to the second-stage heat pump system is connected between the first-stage heat pump system and the second-stage heat pump system, and the intermediate heat exchanger is connected with a refrigerant storage circulation branch for the first-stage heat pump system to store part of refrigerant. The refrigerant circulation branch is connected to the first-stage heat pump system, the first-stage heat pump system is connected with an enhanced vapor injection loop, and the second-stage heat pump system is provided with an economizer used for supercooling heat exchange with the enhanced vapor injection loop. The two-stage cascade heat pump system adopting the structure is high in operation stability, the heating energy efficiency is greatly improved, the system performance is improved, and high-temperature hot water can still be continuously discharged in a low-temperature environment.

The invention relates to temperature adjusting equipment, a lubricating oil separation method and device, a computer readable storage medium and a computer program product. The temperature adjusting equipment comprises a condenser, a subcooler, a pump, an evaporator and a compressor, the condenser, the subcooler, the evaporator and the compressor are communicated through a main flow path pipeline, temperature adjustment is carried out through a refrigerant in the main flow path pipeline, the evaporator is communicated with the subcooler through a conveying pipeline, and the pump is arranged on the conveying pipeline. And the pump is used for pumping the mixture to be separated in the evaporator into the subcooler, so that the mixture to be separated exchanges heat with the main flow path pipeline in the subcooler. The temperature adjusting equipment can improve the heat exchange efficiency of the unit.

The utility model provides a heat management integration module and an electric automobile. The heat management integration module comprises a flow channel flat plate, a compressor, a condenser, a heat regenerator, an evaporator, a second expansion valve and a first expansion valve. The runner flat plate is provided with first to fourth channels, a first secondary refrigerant inlet and outlet and a second secondary refrigerant inlet and outlet; a compressor exhaust port, a condenser refrigerant channel, a first channel, a first heat regenerator refrigerant channel, a second channel, an evaporator refrigerant channel, a third channel and the other heat regenerator refrigerant channel are sequentially connected with an air suction port of a compressor, and a first expansion valve is arranged in the second channel. The fourth channel is connected with an exhaust port of the compressor, the condenser and an air suction port of the compressor; the second expansion valve is arranged in the fourth channel; the first secondary refrigerant inlet and the first secondary refrigerant outlet are respectively connected with two ends of a secondary refrigerant channel of the condenser; the second refrigerating medium inlet and the second refrigerating medium outlet are connected with the two ends of a refrigerating medium channel of the evaporator respectively.

The present invention relates to the field of air conditioning, and in particular to a condenser and an air conditioner. The condenser of the present invention comprises: a shell, wherein the two ends of the shell along the first direction are respectively provided with a refrigerant inlet and a refrigerant outlet; a heat exchange device, which is arranged in the shell and comprises a heat exchange tube, wherein the heat exchange tube is used to pass a cooling medium; and a supercooling device, which is arranged in the shell and is located on a side of the heat exchange device close to the refrigerant outlet, and the supercooling device comprises a flash supercooling device and a baffle supercooling device, and the flash supercooling device and the baffle supercooling device are sequentially arranged along the direction from the refrigerant inlet to the refrigerant outlet. Based on this, the supercooling degree of the condenser can be effectively improved.

The utility model discloses a finned tube type heat exchanger which comprises a copper heat exchange tube and a plurality of fins, the heat exchange tube penetrates through the fins and is bent in a circuitous mode to form a double-row heat exchange loop, the fins are provided with a plurality of heat exchange loops which are evenly distributed in the vertical direction, one end of each heat exchange loop is connected to a liquid collecting tube, and the other end of each heat exchange loop is connected to a heat exchanger. The other ends of all the heat exchange loops are connected to the exhaust vertical pipe, and the two rows of transverse flow channels in the heat exchange loops are staggered in the vertical direction. During refrigeration, refrigerants in each loop enter the outer-row heat exchange coil from the inner-row heat exchange coil, the refrigerants and outdoor air are ventilated and subjected to countercurrent flow heat exchange, the supercooling degree of the refrigerants is improved, and therefore the refrigerating capacity of the air source heat pump unit is improved. When the air source heat pump unit is used for heating, refrigerants in each loop enter the inner-row heat exchange coil from the outer-row heat exchange coil, the refrigerants and outdoor air are ventilated and exchange heat in a downstream mode, the evaporation heat absorption and exchange length of the refrigerants is increased, and therefore the heating capacity of the air source heat pump unit is increased.

The utility model discloses a water heater and an inner container of the water heater. The inner container of the water heater comprises a container body, the liner body is filled with a phase change medium dispersed with nucleating agent particles, and the particle size of the nucleating agent particles is a predetermined size; the water heater inner container further comprises a heat exchange assembly. The heat exchange assembly comprises a plurality of fins and heat exchange tubes, the plurality of fins are fixed in the liner body at preset intervals, mounting holes are formed in the fins, and the heat exchange tubes are arranged in the fins in a penetrating manner through the mounting holes; the preset distance between the multiple fins is 1.5 times to 5 times of the preset size. According to the water heater and the inner container thereof, the preset distance between every two adjacent fins in the inner container is improved, the heat exchange efficiency of the water heater can be improved, and therefore the hot water supply capacity of the water heater is improved.

This application discloses a vehicle refrigeration unit and its refrigeration system, belonging to the related technical field of vehicle refrigeration units. It includes an installation frame with a housing and an inner housing detachably mounted on both sides. An air outlet assembly is located at the top of the inner housing, and the assembly includes a vertically structured mounting plate. External and internal air outlets are respectively located on the two sides of the vertically arranged mounting plate. The beneficial effects of this application are: the refrigerant from the condenser is directly split. During this splitting, one path is throttled and cooled by a throttling device before entering the economizer, while the other path, the un-throttled mainstream refrigerant, enters the economizer. The two refrigerants undergo sufficient heat exchange within the economizer. The throttled, low-temperature refrigerant can more effectively absorb heat from the mainstream refrigerant, thereby significantly increasing the subcooling of the mainstream refrigerant. This results in a lower dryness and higher liquid ratio of the refrigerant entering the evaporator, leading to a higher cooling capacity per unit mass of refrigerant.

This invention belongs to the field of aluminum-based composite material preparation technology, and relates to a continuous casting and rolling method for preparing aluminum-based composite material strips. The method involves preparing a reinforcing preform with a thickness not exceeding the roll gap distance in the aluminum-based composite material strip. Before preparing the aluminum-based composite material strip, the casting rolls are water-cooled and run at a set speed. Molten aluminum is injected into the molten pool, and the liquid level is controlled to a set value. Throughout the preparation process, the molten pool liquid level is maintained at the set value. The molten aluminum cools and solidifies upon contact with the roll surface of the casting rolls. Under the casting action of the two casting rolls, an aluminum alloy strip is formed and continuously output from the lower end of the roll gap. During the preparation process, the reinforcing preform moves from top to bottom at a set speed and is immersed in the molten aluminum pool. The molten aluminum penetrates into and fills the interior of the reinforcing preform. The reinforced preform, filled with molten aluminum, gradually solidifies as it moves to the roll gap until it is completely solidified. Then, under the casting force of the two casting rolls, it undergoes rolling deformation to form the aluminum-based composite material strip.