4474results about "Tubular elements" patented technology

The present invention relates to the technical field of waste heat recovery equipment, and specifically discloses a waste heat recovery device for flue gas in a thermal power plant. It includes a box body with an upper smoke chamber, a heat exchange chamber and a lower smoke chamber inside. A number of smoke pipes connecting the upper smoke chamber and the lower smoke chamber are fixed in the heat exchange chamber; above the smoke pipes, there is a piston cylinder fixed by the box body; the upper end of the piston cylinder is connected to a high-pressure gas supply pipe, and a piston is arranged inside. The piston is connected with a scraping head through a push rod; side holes are provided on the push rod; when the high-pressure gas drives the piston to move downward, the scraping head moves along the inner wall of the smoke pipe to scrape off the ash slag. The waste heat recovery device for flue gas in this thermal power plant has a cleaning function and a better cleaning effect, high heat exchange efficiency and good waste heat recovery effect. The waste heat recovery device for flue gas in this thermal power plant can be automatically cleaned without disassembling components, is fast and efficient, and can be operated online. The ash slag scraped off during the cleaning process can be centrally recovered, avoiding re-mixing into the flue gas again, reducing the workload in the flue gas dust treatment link, and saving the subsequent environmental protection treatment cost.

The invention discloses a biogas internal combustion engine exhaust gas waste heat cascade reutilization heat energy recovery device which comprises an exhaust gas conveying pipeline, a heat exchange cavity is formed in the exhaust gas conveying pipeline, a plurality of tower-shaped spiral heat exchange pipelines are arranged in the heat exchange cavity, the multiple heat exchange pipelines are vertically and sequentially distributed, the heat exchange pipelines are corrugated pipelines, and the heat exchange pipelines are communicated with the heat exchange cavity. A power rod is arranged in the middle of the heat exchange pipeline; the vibration motor and the power rod are arranged in the waste gas conveying pipeline, so that the power rod can guide and transmit the driving force of the vibration motor to the tower-shaped spiral heat exchange pipeline capable of extending and contracting through the hard connecting structure or the soft connecting structure, and the heat exchange pipeline can shake up and down in the heat exchange operation period; and therefore, water flowing in the pipeline can be driven to roll up and down, the water flowing in the pipeline can be more sufficiently and uniformly attached to the inner wall of the heat exchange pipeline, the heating area of the pipeline is more uniform, and the overall heat exchange effect is effectively improved.

The invention belongs to the technical field of heat exchange, and particularly relates to a liquid metal enhanced heat exchange pipeline which comprises a pipeline body, an auxiliary heat exchange cavity and liquid metal. One end of the auxiliary heat exchange cavity is arranged on the pipeline body, and the other end of the auxiliary heat exchange cavity is far away from the pipeline body; the auxiliary heat exchange cavity is filled with the liquid metal. The auxiliary heat exchange cavity is filled with the liquid metal, and compared with a traditional cooling medium, the liquid metal can transfer heat more quickly by means of the ultrahigh heat conductivity of the liquid metal, the heat resistance is reduced, and the overall heat exchange efficiency is improved. In addition, due to the high thermal conductivity of the liquid metal and the optimized heat exchange structure, efficient heat exchange can be achieved in a more compact space, and the requirement for additional cooling fins or heat exchange assemblies is reduced. And compared with a traditional heat exchanger, the heat exchange power density of unit volume is higher, the heat exchanger is suitable for high-power electronic equipment, spaceflight heat dissipation systems and new energy heat exchange equipment, and the requirements for miniaturization and efficient heat dissipation are met.

A heat dissipation device includes a vapor chamber (1) and at least one heat pipe (2). The vapor chamber (1) includes a bottom plate (10) and a top plate (11) combined with each other to form a cavity (100); the cavity (100) contains a top plate capillary layer (11a) covering the top plate (11) which has at least one through hole (110). The heat pipe (2) includes a pipe body (20) with a closed end (200) and an open end (201) fixed in the through hole (110), and a pipe capillary layer (21) with a connecting portion (210). The top plate (11) includes at least one protrusion (111) corresponding to the through hole (110) and having a receiving portion (111a) recessed inside the top plate (11), and a capillary structure (11b) in the receiving portion (111a) and contacting with the connecting portion (210) and top plate capillary layer (11a).

The invention discloses an integrated heat exchanger for a hybrid electric vehicle, which belongs to the technical field of heat exchangers and comprises an integrated box, a first water chamber and a second water chamber are mounted in the integrated box, and a cooling liquid inlet pipe and a cooling liquid outlet pipe of an engine are fixedly mounted on the first water chamber. A motor cooling liquid outlet pipe is fixedly mounted on the second water chamber, a first spiral channel and a second spiral channel are formed in the mixing pipe, and a heat dissipation pipe is connected between the first water chamber and the second water chamber in a sealed mode. In the mixing pipe, fluid-solid coupling heat exchange is carried out on the engine cooling liquid and the motor inlet cooling liquid with the low temperature, the engine cooling liquid returns to the first water chamber after the temperature of the engine cooling liquid is reduced, the process is repeated for multiple times, and the engine cooling liquid subjected to primary cooling is subjected to secondary cooling.

The present invention relates to the technical field of alumina production. The present invention discloses a waste heat recovery device for a roasting furnace, which comprises a flue gas fan, a heat exchange pipeline and an exhaust hood. A flue gas pipeline is arranged at the inlet of the flue gas fan and communicated with an external roasting furnace. The outlet of the flue gas fan is communicated with a plurality of heat exchange pipelines. The top ends of the heat exchange pipelines are jointly communicated with the exhaust hood. A flue gas outlet pipe is arranged at the top of the exhaust hood, and an outlet valve is arranged on the flue gas outlet pipe. It is characterized in that: a converging throat is arranged in the middle of the heat exchange pipeline, and a diffusor wall with horizontal displacement is arranged above the throat. The advantages of the present invention compared with the prior art are as follows: by performing heat exchange while pressurizing the flue gas flow, the water vapor contained in the flue gas can be liquefied and release heat, and its latent heat of vaporization can be fully released and absorbed. For the field to which the present invention is applied, the latent heat of vaporization can be used to heat mother liquor and flat plate washing water, saving the steam cost for heating flat plate washing water, reducing energy consumption and reducing emissions.

Embodiments of this application provide a fluid collector, a thermal management assembly, a battery, and an electric apparatus. The fluid collector is applied to the thermal management assembly of the battery and includes a housing and a separation portion. The housing has a fluid collecting chamber, where the fluid collecting chamber is configured to be connected to a plurality of heat exchange channels in the thermal management assembly. The separation portion is provided on the housing to partition the fluid collecting chamber into a plurality of concave cavities. The plurality of heat exchange channels are connected in series and communicate with each other through the plurality of concave cavities. This can alleviate non-uniform heating of a battery cell caused by provision of a single cavity in a fluid collector, enhancing the heat exchange effect of the battery cell and reducing the risk of thermal runaway in the battery.

The invention discloses an immersed liquid cooling device, which includes a liquid cooling radiator with a first liquid box at one end thereof combined with the open end of a liquid storage box, so that a heat dissipation radiator pipe set at the other end is immersed in the cooling fluid in the liquid storage box. The liquid storage box is externally equipped with a cooling chip and a heat sink. When the cooling chip is energized, the cooling chip will reduce the cooling fluid in the liquid storage box to a freezing temperature, so that the cooling fluid can quickly cool down the working fluid in the heat dissipation radiator pipe set, thereby preventing the heat dissipation radiator pipe set from being affected by the ambient temperature in its heat dissipation efficiency.

The utility model discloses a radiator fin and a heat exchange device thereof, and belongs to the field of radiators. Comprises: a body region; the windward area is arranged on one side of the main body area; the leeward area is arranged on the other side of the main body area; heat exchange through holes are distributed in the main body area and the leeward area, connecting pipes are arranged on the heat exchange through holes, and the connecting pipes are formed by stretching the fins; the main body area is a wave-shaped fin, the windward area is distributed in a wave shape and is provided with a plurality of wave crests and wave troughs, and the leeward area is of a plate-shaped structure and is smoothly connected with the main body area. The radiator fin has the beneficial effects that the surface area is reduced, the airflow resistance is reduced, and the heat exchange efficiency is improved.

The invention relates to the technical field of heat exchange equipment, and discloses a gas-fired boiler equipment power heat exchange device which comprises a heat exchange box, a heat exchange pipe is installed in the heat exchange box, a plurality of heat exchange fins are installed on the heat exchange pipe, and the heat exchange fins are connected through heat conduction fins; the cleaning block is slidably mounted on the heat exchange fins, and a cleaning brush is mounted on the surface, facing the heat exchange fins, of the cleaning block; the driving assembly is mounted in the heat exchange box; through the arrangement of the heat conduction fins, the temperature difference between the windward heat conduction fins and the leeward heat conduction fins can be reduced, and after the heat conduction fins are used for a period of time, the driving assembly drives the cleaning block to rotate, so that the cleaning block slides on the surfaces of the heat exchange fins to clean dirt attached to the surfaces of the heat exchange fins, and it is ensured that each heat exchange fin is in a clean state; the heat exchange fins can conduct heat sufficiently, so that it is guaranteed that the temperature of the heat exchange fins in all the areas is not uneven, and the heat exchange efficiency of the device is effectively improved.

The invention relates to the technical field of heat dissipation pipes and discloses a fin type heat dissipation pipe which comprises a rectangular supporting frame, a plurality of heat dissipation pipe bodies are rotationally connected into the supporting frame, and a shaking mechanism used for driving the heat dissipation pipe bodies to synchronously clean attached dust is arranged at the top of the supporting frame. A power storage mechanism used for driving the shaking mechanism to work is further arranged at the top of the supporting frame, a driving mechanism is arranged at the position, on one side of the power storage mechanism, of the top of the supporting frame, the shaking mechanism is arranged, a rotating rod is used for driving the heat dissipation pipe body to rotate intermittently, attached dust is shaken off in the rotating process of the heat dissipation pipe body, and the dust is cleaned through regular shaking; the surface of the fin can be kept clean, so that the optimal working state of the radiator is ensured, the efficient heat exchange performance is maintained, a method for removing dust through shaking hardly causes damage to equipment, the method does not involve direct contact or use of chemical substances, and the completeness of the radiating pipe and the fin of the radiating pipe can be effectively protected.

A spacer device for incorporation into a bent-tube heat exchanger that includes a spine and a plurality of fingers that protrude from one side of the spine. The number of fingers in the spacer device is less than the number of tubes that are folded in a region to form the bent-tube heat exchanger. The plurality of fingers are configured to exert a force against the tubes and to provide and maintain a separation between the tubes in the folded region. A heat exchanger that includes the spacer device may also include a coating on the tubes in the folded region in order to reduce corrosion and increase the life-time of the heat exchanger. The method of forming the heat exchanger includes placing the spacer device between the tubes, such that the fingers lay on the tubes in the region to be folded and assist in the folding process.

The invention provides a heat exchanger and energy storage equipment. The heat exchanger comprises a refrigerant base plate, a plurality of condensation plate heat exchangers and a plurality of evaporation plate heat exchangers, and each condensation plate heat exchanger and each evaporation plate heat exchanger are arranged on the same side of the refrigerant base plate in the first direction. The side face, facing the refrigerant base plate, of each condensation plate exchanger comprises a refrigerant inlet and a refrigerant outlet, the side face, facing the refrigerant base plate, of each evaporation plate exchanger comprises a refrigerant inlet and a refrigerant outlet, and the refrigerant base plate comprises two condensation refrigerant flow channels and two evaporation refrigerant flow channels. One of the two condensation refrigerant flow channels is used for being communicated with a refrigerant inlet of each condensation plate heat exchanger, and the other condensation refrigerant flow channel is used for being communicated with a refrigerant outlet of each condensation plate heat exchanger. One of the two evaporation refrigerant flow channels is used for communicating with the other condensation refrigerant flow channel and a refrigerant inlet of each evaporation plate heat exchanger, and the other evaporation refrigerant flow channel is used for communicating with a refrigerant outlet of each evaporation plate heat exchanger. The refrigerating capacity of the heat exchanger can be improved.

A heat dissipation device includes a vapor chamber (1) and at least one heat pipe (2). The vapor chamber (1) includes a bottom plate (10) and a top plate (11) combined with each other to form a cavity (100); the cavity (100) contains a top plate capillary layer (11a) covering the top plate (11) which has at least one through hole (110). The heat pipe (2) includes a pipe body (20) with a closed end (200) and an open end (201) fixed in the through hole (110), and a pipe capillary layer (21) with a connecting portion (210). The top plate (11) includes at least one protrusion (111) corresponding to the through hole (110) and having a receiving portion (111a) recessed inside the top plate (11), and a capillary structure (11b) in the receiving portion (111a) and contacting with the connecting portion (210) and top plate capillary layer (11a).

The utility model relates to the technical field of air compressor heat recovery, and discloses a heat recovery pipeline device for a screw air compressor, which comprises a bottom plate, a shell and an air compressor main body, the shell is fixedly connected with the bottom plate, a support seat is arranged on one side of the shell, the air compressor main body is mounted at the upper end of the support seat through a fastener, and the air compressor main body is fixedly connected with the bottom plate. According to the air compressor, heat generated during working of the air compressor body is transmitted to the multiple sets of heat conducting fins below through the heat conducting blocks, and then the heat is effectively transmitted to gas passing through the spiral pipe through the multiple sets of heat conducting fins; then heated gas enters a heat conduction coil pipe through a conveying pipe and a gas inlet pipe, a motor drives a stirring column to rotate through an output shaft, multiple sets of stirring blades on the stirring column stir water, under cooperation of a plurality of threaded groove holes, flowing of the water in the water storage tank is accelerated, the water is fully heated, and the recovery efficiency is improved.

The invention discloses a high-heat-conductivity floor heating spiral pipe based on graphene, and belongs to the field of floor heating pipes. Comprising a pipe body, a plurality of protruding structures and groove structures are arranged on the outer wall of the pipe body, and the protruding structures and the groove structures are arranged alternately. According to the floor heating spiral pipe, a PERT material serves as a base pipe, and in the raw material preparation process of the base pipe, a graphene material is added according to a specific proportion. The graphene is uniformly dispersed in a PERT matrix through an advanced mixing process to form a stable composite material system, so that the PERT-based tube is endowed with excellent high heat-conducting property, and compared with a traditional PERT material, the heat conductivity coefficient of the PERT-based tube is remarkably improved. During construction, the spiral pipe is designed and laid according to a floor heating system, the spiral concave-convex outer wall of the spiral pipe is in contact with a cement filling layer, the occlusion degree with cement is increased through the concave-convex structure, and the compactness is improved.

The utility model discloses an efficient condenser for an air cooler, and relates to the field of refrigeration equipment, the efficient condenser comprises a condenser shell and a plurality of pipelines fixed in the condenser shell, and a plurality of cooling fins located in the condenser shell are fixedly clamped to the multiple pipelines; the cooling fins comprise a plurality of middle fins clamped between every two pipelines, and side fins fixed to one ends of the middle fins through buckles are clamped to one sides of the pipelines located outside. The top cover and the bottom cover of the condenser shell are detached, then the buckles are detached, the middle fins, the side fins and the pipelines are separated, then new cooling fins can be replaced, the cost for replacing the pipelines is omitted, and the maintenance cost of families or factories and the like is effectively reduced.

The invention provides a heat exchanger and energy storage equipment. The heat exchanger comprises at least one condensation plate heat exchanger, a plurality of evaporation plate heat exchangers and a refrigerant base plate, and each evaporation plate heat exchanger and each condensation plate heat exchanger are arranged on the same side of the refrigerant base plate in the first direction. The side face, facing the refrigerant base plate, of each condensation plate exchanger comprises a condensation refrigerant outlet, and the side face, facing the refrigerant base plate, of each evaporation plate exchanger comprises an evaporation refrigerant inlet. The refrigerant base plate comprises a confluence flow channel and at least one flow dividing structure, each flow dividing structure comprises a plurality of flow dividing flow channels, one end of the confluence flow channel is used for being communicated with a condensation refrigerant outlet of each condensation plate heat exchanger, and the other end of the confluence flow channel is used for being communicated with one end of each flow dividing flow channel. And the other end of each shunting flow channel is used for communicating with an evaporation refrigerant inlet of one evaporation plate heat exchanger. According to the heat exchanger provided by the embodiment of the invention, the shunting structure is arranged on the refrigerant substrate, so that the occupied space of the heat exchanger is reduced, and the assembly of the heat exchanger is simplified.

In some examples, a heat exchanger includes a first flow channel having a first flow channel inlet and a first flow channel outlet. The heat exchanger also includes a second flow channel having a second flow channel inlet and a second flow channel outlet. A fin may separate the first flow channel from the second flow channel. The fin may define at least one aperture configured to allow fluid to flow between the first flow channel and the second flow channel if one of the first flow channel inlet or second flow channel inlet becomes constricted through a buildup of foreign object debris.

The invention provides a radiation refrigeration plate combining a sky radiation refrigeration material and a plate heat exchanger, and relates to the technical field of refrigeration, the radiation refrigeration plate comprises a sky radiation refrigeration material layer, a plate heat exchanger assembly, a fan cover layer and a heat insulation material layer, the sky radiation refrigeration material layer has high reflectivity in a solar spectrum wave band and has high emissivity in an atmospheric window wave band, and the plate heat exchanger assembly has high reflectivity in a heat insulation material layer; and heat can be efficiently radiated to the outer space. The plate heat exchanger assembly comprises an enhanced heat exchange tube and a nanofluid, and the nanofluid is filled in the enhanced heat exchange tube and used for heat transfer and transport capacity and enhancing the heat exchange effect. And the fan cover covers the sky radiation refrigeration material. The heat insulation material layer is laid on the portion, except the top face, of the radiation refrigeration plate so as to reduce heat loss of the system to the surrounding environment, and the refrigeration effect is guaranteed. By means of the structure, working modes in the daytime and at night are achieved, the heat transfer efficiency of the system is greatly improved, energy consumption is reduced, and the efficient radiation refrigeration effect of all-weather continuous operation at the temperature lower than the environment temperature is achieved.

The utility model relates to the technical field of air conditioning equipment, in particular to a heat exchanger and an air conditioner. The heat exchanger is applied to the air conditioner, the air conditioner has a reheating dehumidification mode, and the heat exchanger comprises a first heat exchange part, a second heat exchange part and a first throttling element; in the reheating dehumidification mode, the first heat exchange part is configured to heat air flowing through the first heat exchange part; the second heat exchange part is configured to cool and dehumidify the air flowing through the second heat exchange part; the ratio of the action area of the first heat exchange part and the air to the action area of the second heat exchange part and the air is 0.2-2; the first throttling element is arranged between the first heat exchange part and the second heat exchange part in series. The proportion of the action area of the first heat exchange part and the action area of the second heat exchange part and the air is limited, and therefore it can be effectively guaranteed that the good temperature control dehumidification effect can be achieved in the reheating dehumidification mode, and the use experience feeling of a user is improved.

A heat exchanger includes at least two plate bodies stacked with each other and at least one connecting sheet. Each of the at least two plate bodies is provided with a plurality of micro-passages. The at least one connecting sheet is arranged between adjacent plate bodies of the at least two plate bodies. A solder is disposed on each of two opposite sides of the at least one connecting sheet, and the solder is configured to weld and fix the at least one connecting sheet with the adjacent plate bodies of the at least two plate bodies.

The invention relates to the technical field of waste heat recovery equipment, and particularly discloses a flue gas waste heat recovery device for a thermal power plant. An upper smoke chamber, a heat exchange chamber and a lower smoke chamber are arranged in the box body, and a plurality of smoke pipes for communicating the upper smoke chamber with the lower smoke chamber are fixed in the heat exchange chamber; a piston cylinder fixed by the box body is arranged right above the smoke pipe; the upper end of the piston cylinder is connected with a high-pressure air supply pipe, and a piston is arranged in the piston cylinder and connected with a wall scraping head through a push rod. The push rod is provided with a side hole. When the high-pressure gas drives the piston to move downwards, the wall scraping head moves close to the inner wall of the smoke pipe, and ash is scraped away. The flue gas waste heat recovery device for the thermal power plant has a cleaning function and is good in cleaning effect, high in heat exchange efficiency and good in waste heat recovery effect. The flue gas waste heat recovery device for the thermal power plant can be automatically cleaned, parts do not need to be disassembled, and the device is fast, efficient and capable of being operated online. Ash scraped in the cleaning process can be recycled in a centralized mode and is prevented from being mixed into flue gas again, the workload of the flue gas dust treatment link is reduced, and the follow-up environment-friendly treatment cost is saved.

The invention is suitable for the technical field of flue gas waste heat utilization, and provides a high-temperature flue gas heat exchanger which comprises a heat exchange assembly, and a flue gas inlet assembly is fixed to the top of the heat exchange assembly; the heat exchange assembly comprises a box part, a water inlet part inserted into the box part and a plurality of heat conduction parts slidably arranged on the water inlet part, and the smoke inlet assembly comprises a smoke inlet part, a displacement part slidably arranged in the smoke inlet part and a blocking part slidably arranged in the smoke inlet part. The high-temperature flue gas heat exchanger solves the technical problems that in the using process of an existing high-temperature flue gas heat exchanger, heat exchange tubes and fins in the high-temperature flue gas heat exchanger are mostly fixedly connected into the high-temperature flue gas heat exchanger, the heat exchange effect of the high-temperature flue gas heat exchanger is too poor, and the heat exchange effect of waste heat in flue gas is reduced. The technical effects that smoke flow in the heat exchange box can be accelerated, the heat exchange effect of the multiple fins and the smoke in the heat exchange box is improved, and the later heat exchange efficiency is improved are achieved.

The application discloses finned tube type phase change heat storage equipment, including heat storage shell, both ends of heat storage shell are provided with sealing end plate, two sealing end plates are arranged, the inside of heat storage shell between two sealing end plates is provided with partition layer, the middle of heat storage shell is provided with coaxial center flow pipe, the opposite ends of center flow pipe are sealed and penetrated through sealing end plate through sealing sleeve, the space between partition layer and center flow pipe is set as phase change heat storage cavity, the inside of partition layer and the outside of center flow pipe are provided with heat transfer fin, the application belongs to phase change heat storage technical field, the purpose of the application is to solve the problems of low heat storage efficiency and poor equipment stability in prior art, the technical effects are as follows: double flow makes phase change heat storage efficiency improved, double cavity phase change heat storage material is arranged in heat storage equipment, heat storage energy efficiency is high, fin strengthens phase change heat storage and structural support, equipment is stable, and has good sealing and plugging performance.

The utility model relates to the technical field of energy storage equipment, in particular to a liquid cooling device and a battery pack, and the liquid cooling device comprises a plurality of liquid cooling plates, a plurality of metal pipes and a plurality of connecting pieces. Each metal pipe is used for communicating two liquid cooling plates, and the end parts of the metal pipes are hermetically inserted into the communicating ports of the liquid cooling plates. The connecting piece is arranged at the butt joint position of the metal pipe and the liquid cooling plate, the metal pipe is connected to the connecting piece, the connecting piece is connected to the liquid cooling plate, the distance between the connecting piece and the liquid cooling plate can be adjusted, and the depth of the metal pipe inserted into the communicating opening changes along with changes of the distance between the connecting piece and the liquid cooling plate. The battery pack comprises a battery box and the liquid cooling device, wherein the liquid cooling device is arranged in the battery box. The battery pack can meet the requirement for high bursting pressure resistance and can absorb assembly tolerance.

The invention relates to a heat exchange technology, in particular to a tubular heat exchanger with fins capable of being turned over and expanded to be adjustable and an adjusting method thereof.The tubular heat exchanger comprises a heat exchanger shell, tube boxes installed at the two ends of the heat exchanger shell and tube plates arranged between the heat exchanger shell and the tube boxes, and a plurality of heat transfer tubes are installed in the heat exchanger shell; and an expansion fin structure is arranged on the heat transfer pipe. According to the tubular heat exchanger, dynamic adjustment of the heat exchange area is achieved through the reasonably-designed structural combination and connection relation of the expanded fin structure and the driving structure, the heat exchange efficiency and the equipment adaptability are remarkably improved, and specifically, the expanded fin structure enables the heat exchanger to meet the requirements of different working conditions according to the requirements of different working conditions. The heat exchange area is flexibly adjusted, the dynamic adjusting capacity not only improves the efficiency of the heat exchanger under different operation conditions, but also reduces energy waste caused by the fixed heat exchange area, and therefore higher energy utilization efficiency is achieved.

The invention discloses a three-dimensional incongruous fractal fin latent heat storage device which comprises an outer pipe shell and a fluid inner pipe, the fluid inner pipe is arranged in the outer pipe shell in a penetrating mode, the space between the outer pipe shell and the fluid inner pipe is filled with phase change heat storage materials, and a plurality of three-dimensional incongruous fractal fins are arranged on the outer side wall of the fluid inner pipe. Each three-dimensional incongruous fractal fin comprises a linear first-stage main fin, two second-stage fractal fins and four third-stage fractal fins, the first end of each first-stage main fin is connected to the outer side wall of the fluid inner pipe, and the second-stage fractal fins are distributed in a V shape on the radial section of the fluid inner pipe and jointly connected to the second end of the first-stage main fin; every two third-stage fractal fins are distributed in a V shape on the axial section of the fluid inner pipe and jointly connected to the ends, away from the first-stage main fins, of the second-stage fractal fins. The invention further discloses a fin optimization method of the heat exchanger. The melting time can be shortened while the heat storage amount can be guaranteed, and efficient heat exchange of the phase change latent heat storage device is achieved.

A hollow pipe cooling device includes a covering member, a spacer member and a hollow pipe. A top surface of the spacer member is partially exposed to a top cover opening of the covering member. The hollow pipe includes a surrounding wall part and a closed end part. A first end of the surrounding wall part is connected with the closed end part. A second end of the surrounding wall part is an opened end part. A heat dissipation space is defined by the surrounding wall part and the closed end part collaboratively. The opened end part is used as an entrance / exit of the heat dissipation space. A hollow pipe wick structure is formed on an inner wall of the surrounding wall part. The opened end part is aligned with the corresponding top cover opening and contacted with the spacer member.