163results about How to "Heat dissipation fast" patented technology

An LED streetlight with heat-dissipating structure. The LED streetlight includes a light housing composed of an upper cover and a lower cover connected therewith to define an opening, a common rail assembly fixedly attached to an inner face of a bottom of the light housing, and a gas-permeable shade. The common rail assembly includes multiple common rail base seats connected with multiple LED light bulbs and multiple circuit boards. The gas-permeable shade is fitted with the end of the light housing to seal the opening thereof. The heat generated by the LED light bulbs are conducted by the common rail base seats and dissipated to internal space and outer side of the light housing. The heat on outer side of the light housing is carried away by external cold air. The heat in the internal space of the light housing is quickly dissipated through the gas-permeable shade to outer side of the light housing by way of thermal convection.

The invention relates to the preparation field of polymer material, aiming at providing the improvement of the preparation method of fluorescent pigment latex. The fluorescent pigment latex prepared by the method has fine particle diameter, uniform distribution, bright color and luster, and also excellent properties of temperature resistance, acid-base resistance, and sun and weather resistance. The technical proposal is as follows: the preparation method of the fluorescent pigment latex comprises the following steps of: 1. preparing a solution system: adding water into a reactor, and stirring for dissolution after sequentially adding a dispersant, a surfactant and a fluorescent dye, thus forming a uniform solution system; 2. adding monomers into the solution system, and stirring to form a uniform emulsified liquid system; and 3. adding an initiator after heating the prepared emulsified liquid system until the temperature is raised to 40 to 100 DEG C, and preparing the required product by polyreaction.

The invention discloses a differential pitch pole piece and a power battery adopting the same, wherein the power battery comprises a battery cell, a positioning cover, an aluminium cover and a shell, the battery cell is arranged in the shell, the positioning cover is arranged above the battery cell, the aluminium cover is arranged above the positioning cover and is fixedly connected with the shell, the battery cell comprises a positive pole piece, a first membrane, a negative pole piece and a second membrane, both the positive and the negative pole pieces are differential pitch pole pieces, each differential pitch pole piece comprises a coating part and a non-coating part which is positioned above the coating part, the non-coating parts are punched at intervals to form a plurality of projecting parts, the widths of the projecting parts are the same, pitches between every two adjacent projecting parts are sequentially increased from front to back for forming a single differential pitch structure, or the pitches between every two spaced projecting parts are sequentially increased from front to back for forming a double-differential pitch structure, after the whole differential pitch pole pieces are wound, all the projecting parts are superposed with one another to form a pole lug, and the positive pole piece, the first membrane, the negative pole piece and the second membrane are stacked orderly to be wound into the battery cell. In the invention, the structure and the technology are simplified, the volume is reduced, and the quality of the power battery is improved.

The invention discloses a power distribution cabinet with an efficient heat dissipation and cooling function. The power distribution cabinet comprises a cabinet body, cooling water pipes, a cooling blower and a plurality of blast pipes; the cabinet body comprises outer plates and inner plates; electric appliance component mounting grooves are formed in the inner side walls of the inner plates separately; an interval is reserved between the outer plate and the corresponding inner plate; the cooling water pipes are arranged in an S-shaped spiral manner from bottom to top along the intervals; the cooling blower is fixed to the top of the cabinet body; the blast pipes are fixed to the side surfaces of the mounting grooves and are in the same direction with the mounting grooves. According to the structure, the power distribution cabinet with the efficient heat dissipation and cooling function adopts both air cooling and water cooling manners to realize heat dissipation, and has the characteristics of being quick in heat dissipation, and excellent in cooling effect; meanwhile, the cabinet body is provided with a ventilation device, so that the realization of the whole cooling effect of the cabinet body is accelerated.

The invention relates to a high-power LED heat radiator, and belongs to the field of LED heat radiation. The high-power LED heat radiator based on a heat pipe technology is characterized in that a gravity heat pipe in the center and sunflower-shaped cooling fins (4) around the gravity heat pipe are included, the gravity heat pipe comprises a middle through pipe (1), an upper cover (2) and a bottom cover (3), the middle through pipe (1) is integrally welded to the upper cover (2) and the bottom cover (3), vacuum is formed in a sealing mode, the space among the middle through pipe, the upper cover and the bottom cover is filled with refrigeration media (5), the cooling fins (4) are arranged around the through pipe (1), a plurality of evenly-distributed protruding groove emulsion structures (6) are arranged in the portion, in the through pipe, of the upper surface of the bottom cover (3), a sealing hole (7) is formed in the middle of the upper cover (3), and the lower portion of the bottom cover (3) is connected with an LED lamp. The structure of overall vacuum sealing and the surrounding cooling fins is adopted, the heat conduction efficiency of the heat pipe is improved, heat radiation is fast, the size is small, and the service life is long.

The invention belongs to the field of storage battery manufacturing technology, and particularly relates to a storage battery grid mold release agent and a preparation method thereof. The storage battery grid mold release agent is prepared from the following raw materials in parts by weight: 0.3-0.7 part of bone glue, 0.4-0.8 part of polyethylene, 0.4-0.8 part of kieselguhr, 0.2-0.5 part of glass water, 0.3-0.7 part of aluminum dihydrogen phosphate, 2-4 parts of cork powder of 200-300 meshes, 2-4 parts of cork powder of 700-800 meshes, and 88.5-94.4 parts of water. The storage battery grid mold release agent is easy to bond, high-temperature-resistant and smooth to exhaust; the prepared grid has fewer pores, thus being easily formed in casting.

The present invention relates to a cooler for a secondary battery. The present invention includes: a heat-dissipating member where a battery cell, which generates when power is supplied, or a cell case is mounted; and a backup member supporting and shielding the heat-dissipating member. The heat-dissipating member is a hexahedron having a first surface, a second surface, and a plurality of sides. At least one of the sides of the heat-dissipating member is inclined. The present invention can dissipate heat from a battery cell, using a heat-dissipating member.

The invention discloses a laser-pumped flowing nano-particle rare-earth ion laser, which comprises a pump laser (4), a gas working chamber (3) and a resonant cavity, wherein a gain medium (6) which can be excited to a high energy state by pump light (5) emitted from the pump laser (4) is filled in the gas working chamber (3), and the gain medium (6) mainly contains rare-earth ion nano-particles. The gas working chamber (3) is communicated to a cycle control device (10) through a connecting pipeline (11). The flowing nano-particle rare-earth ion laser has the advantages of simple structure, less produced heat, fast heat dissipation, large mode volume, little environmental pollution, and the like, and the gain medium can be reused.

The invention provides a non-compact structured new casting mold. The non-compact structured new casting mold comprises a mold shell, a casting system, a truss structure and a sensor, wherein a molding cavity for molding a casting and a temperature control channel for feeding in a temperature control medium are arranged in the mold shell; the casting system is integrally molded with the mold shell, and enables molten liquid of the casting to flow in the molding cavity of the mold shell; the truss structure is positioned out of the mold shell, and is connected with the mold shell for fixing and supporting the mold shell; and the sensor is arranged on the mold shell. the casting mold consisting of the mold shell and the truss replaces a traditional solid compact structure, so that the use level of molding sand is largely reduced, the material is saved, the environmental pollution in the molding sand treatment process is reduced, and the effects of energy conservation and environmental protection are achieved; the heat dissipation of the mold shell is fast, and the cooling efficiency of the casting is high; the sensor can monitor the strain change of temperature or stress of corresponding parts in the casting molding process, and controls the flow and the temperature of a temperature control medium in the temperature control channel according to detected signals; and through effective temperature control of the temperature control medium by the sensor, quick and balanced cooling of the casting is realized, the structure of the casting is improved, the residual stress and deformation of the casting are reduced, and the performance of the casting is improved.

The invention relates to a high-power LED (light-emitting diode) lamp which is high in radiating speed, good in dustproof effect, light in weight, low in energy consumption, and long in service life. The high-power LED lamp comprises an LED light source module, a steam liquid phase-change finned heat-pipe radiator, a radiating fan, a dustproof air filter, a back blowing sewage-disposing fan, an air inlet clapboard, an air guide hole clapboard, an air guide pipe, a maintenance hole, a constant current LED power driver, a protective glass, an air inlet area, a radiating area, an air-exhausting area, a light source area, an air inlet, an air outlet, and a rain-proof plate which are packaged integrally, wherein the high-power LED lamp is assembled in a shell through the light source area, the radiating area, the air inlet area and the air-exhausting area; the LED light source module, the steam liquid phase-change finned heat-pipe radiator, the radiating fan, the dustproof air filter, the back blowing sewage-disposing fan and the constant current LED power driver are integrally packaged; and the back blowing sewage-disposing fan is arranged in the radiating area.

An electric heating table in an improved heat dissipation mode comprises a tabletop plate, an electric cooking appliance, a base, four support pillars and electric heating devices. The electric cooking appliance is arranged on the tabletop plate, the tabletop plate is supported by the support pillars, the upper ends of the support pillars are fixedly connected with the tabletop plate, and the lower ends of the support pillars are fixedly connected with the base. The electric heating table is characterized in that the four support pillars are distributed to form a square when seen from a vertical view, and the electric heating devices are positioned on the support pillars. Owing to the structure, heat dissipation holes are formed in the top and the periphery and at the bottom of each electric heating device to dissipate heat, and the heat can be dissipated quickly. Compared with the prior art, the electric heating table has the advantages that the electric heating table is simple in structure, the temperature can be increased quickly owing to the high heat dissipation speed, and the purpose of saving energy is achieved.

The invention belongs to the technical field of laser devices, and discloses an optical-pumping intermediate infrared gas laser device. The laser device comprises a pumping source, gain media and a resonant cavity, wherein the pumping source comprises an optical seed source, a frequency stabilization device and optical cascade amplifiers; the gain media are HBr or mixed gas formed by other gas such as DF, HF, CO and CO2 and inert gas; the resonant cavity consists of a pumping input mirror and a laser output mirror; seed light can be split by the pumping source, and passes through the optical cascade amplifiers respectively, so that the pumping power is improved; 2-micrometer laser generated by the seed source can be aligned to absorption lines of the gain media, so that overtone pumping is achieved; an HBr gas molecule in an excited state generates fundamental frequency transition; and 4-micrometer intermediate infrared laser is outputted. The laser device is compact in structure, high in expansibility and easy in heat dissipation, and can achieve a high power output of the intermediate infrared laser.

A heat dissipating structure of a backlight module includes two light emitting portions and a backlight portion having a light guide plate, a back reflector and a metal clad. The light guide plate is connected to the back reflector. A dent is formed and attached to the light guide plate. The back reflector is connected to the metal clad. Each light emitting portion includes a metal cover, a lamp cup reflector, at least one lamp tube and lamp holders. The lamp cup reflector is attached to the metal cover. A containing groove is formed at the lamp cup reflector and contains the lamp tubes and lamp holders. A thermal conducting plate is extended from the metal cover and contacted with the metal clad. Thus, the heat produced by the lamp tube can be conducted to the metal clad through the lamp holder and the metal cover for heat dissipation.

The invention discloses an antistatic radiating safety-protective tooling fabric. Warps and wefts of the fabric are made of, by weight percentage, 50-60% of cotton fiber, and 40-50% of polyamide fiber containing nano composite mineral powder, wherein the nano mineral powder accounts for, by weight percentage, 6-25% of the total weight of the polyamide fiber, one to three conductive wires are inserted between the warps and the wefts every other 0.5-1.2cm, warp density is 128-132/inch, weft density is 65-75/inch, and fabric weave is 2/1 twill. The invention further provides a production method of the fabric, which includes component matching, semi-finished product weaving and dyeing and finishing. The obtained fabric is fast in radiating speed, can create instant cool feel in contact with human skin, and has the advantages of electrostatic prevention, lightness, thinness, environmental friendliness and energy conservation.

The invention discloses a motor liquid cooling structure. Windings are wound on the outer side of the stator iron core of the motor, and the stator iron core wound with the windings is fixed on the motor shaft through a bracket. The integral dynamic seal formed by the cover, the end cover and the casing is sleeved on the outside of the stator core wound with windings, and a sealed ring is formed between the casing, the end cover, the motor shaft and the stator core wound with windings There is a cooling liquid in the ring-shaped space, and the cooling liquid is accommodated in the annular space. When the motor is working, due to the rotation of the shell and the end cover, the agitation of the ribs inside the end cover and the centrifugal force, the cooling liquid is in the sealed The annular space of the motor generates movement. When the coolant flows through the surface of the winding and the stator core, the heat on the winding and the stator core is taken away, so that the heat is quickly transferred to the shell and end cover of the motor to achieve rapid cooling. The motor will not be burned due to high temperature even under the condition of high-speed rotation or high-power operation, which effectively prolongs the service life of the motor.

A welding method for copper and steel and application thereof is described herein. The welding method includes the following steps: butt connecting or sleeve connecting an end to be welded of a copper material with an end to be welded of a steel material; and welding and connecting the end to be welded of the copper material and the end to be welded of the steel material by a heating part of a heat supply device under the protection of a shielding gas, wherein the top end of the heating part is shifted towards the copper material, and the end to be welded of the copper material and the end to be welded of the steel material are simultaneously molten and further fuse mutually.

The invention provides a heat radiating device which comprises the components of a heat conduction module that comprises a closed heat conduction pipe, wherein the heat conduction pipe is internally provided with a heat conduction liquid storage box for storing heat conduction liquid, the heat conduction liquid storage box sufficiently contacts with a heating area in a terminal, the heat conduction pipe is provided with one or a plurality of power generator modules, blades of the engine module are arranged in the heat conduction pipe, the heat conduction liquid flows along a preset path of the heat conduction pipe after heat-absorption and expansion, thereby pushing the blades of the power generator module for generating electric energy, and finally the heat conduction liquid flows back to the heat conduction liquid storage box; the engine module which generates electric energy through pushing of the heat conduction liquid and outputs the electric energy to a power supply management module; and a power supply management module which charges the battery of the terminal by means of the received electric energy. The heat radiating device has advantages of realizing quick heat radiation of a portable terminal product, performing energy recycling on the heat conduction liquid in flowing after heat-absorption and expansion, and storing the recycled electric energy for prolonging duration time of the portable terminal product.

The invention discloses a novel lithium battery heat dissipation thermal insulation system in the technical field of lithium batteries. The novel lithium battery heat dissipation thermal insulation system comprises a lithium battery and a lithium battery box for placing the lithium battery, and also comprises a heat dissipation system for carrying out heat dissipation on the lithium battery, a thermal insulation system for carrying out thermal insulation on the lithium battery, a monitoring system for monitoring the operating temperature of the lithium battery and a photovoltaic panel system for absorbing solar energy and converting the solar energy into electric energy required for the heat dissipation system, the thermal insulation system and the monitoring system. Rapid and effective heat dissipation and thermal insulation can be carried out on the lithium battery positioned inside the lithium battery box, the interaction function is added, the damage of temperature on the lithium battery is retarded, the operation of the lithium battery is protected effectively, and the energy is saved.

The invention belongs to the field of welding materials, and particularly relates to a stainless steel welding rod capable of resisting redness and cracking of coating. The stainless steel welding rodcomprises a stainless steel core wire with a longitudinal V-shaped groove formed in the peripheral surface, a copper-plated layer and the coating, wherein the coating comprises the following dry powder components of 10-12% of rutile, 8%-10% of mica, 8%-10% of calcium carbonate, 8%-10% of magnesium carbonate, 5%-7% of nickel carbonate, 3%-5% of white mud, 2%-4% of zirconium oxide, 8%-10% of fluorite, 1%-3% of spodumene, 4%-6% of ferromanganese, 2%-4% of ferrotitanium, 5%-7% of ferrosilicon, 0.2%-0.3% of sodium alginate, 0.15%-0.25% of carboxymethyl cellulose, 1.5%-2% of nano cerium oxide and/or nano yttrium oxide and/or nano lanthanum oxide, and the balance feldspar. According to the stainless steel welding rod, the core wire is small in volume expansion after being heated, the coating strength is high, the welding arc voltage is high, molten drops are in slag wall and jet combined transition, and reddening resistance and cracking resistance of the coating are high.

The invention discloses an LED double-channel heat radiation lamp which comprises a lamp cap, a heat radiation shell body, a lamp shade, an LED light source matrix. Through holes are processed in the middle of the lamp cap, the heat radiation shell body and the lamp shade; the LED light source matrix is annular; the lamp cap is fixedly connected with the heat radiation shell body through screw threads; the heat radiation shell body is then connected with the lamp shade through screw threads; and the LED light source matrix is fastened between the heat radiation shell body and the lamp shade. The LED double-channel heat la radiation mp has the advantages of quick heat radiation and small volume and is convenient to install.

The invention discloses a safety protection housing of a router. The safety protection housing comprises an inner casing, an upper casing wall of the inner casing is clamped with an upper heat sink, alower casing wall of the inner casing is clamped with a lower heat sink, the left side and the right side of the lower heat sink are attached to the lower end of a heat conduction pipe, the upper endof the heat conduction pipe is attached to the left side and the right side of the upper heat sink, the upper end of the lower heat sink is attached to a support plate, the upper end of the inner casing is clamped with an upper housing, and the left end and the right end in the upper housing are respectively clamped with a fan. The router is arranged in the safety protection housing, during operation, heat is transferred to the lower heat sink through the support plate, heat radiation is realized to a certain degree through the heat sink, then the heat is transferred to the upper heat sink through the heat conduction pipe, heat radiation is performed under the effect of the fans, and rapid radiation of the router is realized through rapid heat radiation of a heat radiation structure.

The invention discloses a reinforcement part for a speaker diaphragm. The reinforcement part has a multi-layer composite structure; the reinforcement part comprises a cooling layer, a first support layer and a second support layer that are respectively fixed on two sides of the cooling layer; each of the first support layer and the second support layer comprises a through hole penetrating throughtwo sides; the reinforcement part further comprises a filler for transferring heat in each through hole, and the thermal conductivity of the filler is higher than the thermal conductivity of the support layers. Through holes are arranged in the first support layer and the second support layer of the reinforcement part, and the fillers for heat conduction are arranged in the through holes, so thatthermal conductivity of two sides of the reinforcement part is enhanced. The speaker with the reinforcement part can transfer heat from a rear sound cavity to a front sound cavity rapidly, then the heat is dissipated outward through air flowing in and out of the front sound cavity, so that the speaker is cooled rapidly.

The invention provides a permanent magnet motor with a heat dissipation function. The motor comprises a stator component, a rotor component and two sealing end covers which cover the two ends of the stator component and the rotor component to form a sealed space. The stator component comprises a stator iron core, a stator coil and a coil installation groove. The coil installation groove is arranged on the stator iron core, the stator coil is arranged in the coil installation groove, the stator component is provided with a conveying channel for inputting a cooling medium into the stator coil and a discharging channel for discharging heat of the stator coil, and the conveying channel, the coil installation groove, the sealed space and the discharging channel communicate in sequence. The permanent magnet motor has the advantages of the good heat dissipation effect, the compact layout and the like.

The invention relates to a water cup capable of rapidly cooling. The water cup comprises a water cup body, wherein a separation layer is arranged at the bottom of the water cup body; meanwhile, a cooling layer arranged around the water cup body is arranged at the periphery of the water cup body; the cooling layer is in a sealed structure with an open top; cold water can be added into the cooling layer from the top; meanwhile, an opening which is through from inside to outside is formed in the cooling layer so that water of the cooling layer can flow out; a fan blade is arranged in the separation layer and the lower end of the fan blade is connected with a micro-motor; the fan blade is driven by the micro-motor to rotate; a USB (Universal Serial Bus) wire is arranged at the bottom of the micro-motor; the micro-motor can be connected with a USB interface of a computer through the USB wire to generate energy for driving the fan blade to rotate; and a fan rotates in front of the water cup body filled with boiled water and the diffusion of hot air in the water cup body is accelerated, so that the effect of rapidly cooling the boiled water is realized. The water cup capable of rapidly cooling has the characteristics of convenience for utilization, simple structure, rapidness in cooling and the like.

Disclosed is an LED light bulb. In the LED light bulb, according to heat dissipation principles, a traditional structure is optimized, the heat dissipation speed is fast, the insulation performance is good, time, materials and costs are saved, and products meet national standards. In order to solve the technical problems of the LED light bulb, the adopted scheme of the LED light bulb is that a mode of a split-combined type structure is designed, an LED light board which is a main heating source is fully in close contact with a heat conducting strip, heat is rapidly conducted to an external light body aluminum cup heat dissipation device which can dissipate heat more rapidly than a traditional heat dissipation device through the heat conducting strip, and the heat is in contact with air and is dissipated into the air. The aluminum cup is made of thin aluminum sheet and is made into a shape of a trumpet, and the middle of the inside of the aluminum cup is hollow-out. The inner support of the LED light bulb is made of transparent plastics to achieve the function of connecting the front and the back, the inside of an inner cavity is provided with an LED driving power supply to achieve total isolation with light body metal materials, so that the insulation performance is enhanced. An LED lampshade is made of plastics of high light transmittance, so that a light source can be used to the largest extent. The LED light bulb does not need complex devices or complex processes, and is easy and convenient to fabricate. The LED light bulb has the advantages of being lightweight, quick in heat dissipation, convenient to manufacture, time-saving, material-saving, cost-saving and good in safety and insulation.

The invention discloses a heat radiation device. The heat radiation device comprises a plate body and a plurality of fins extended out from the plate body. The plate body comprises a fixing part disposed on one side of an air inlet and a heat radiation part connected with the fixing part. The heat radiation part comprises a lateral part, which comprises at least two connected lateral sides. Every fin comprises an inclined surface and a lateral surface opposite to the inclined surface, and the inclined surfaces of the plurality of fins are arranged on a straight line parallel to the plate body, and the lateral surfaces of the plurality of fins are correspondingly aligned with the side edges of the lateral sides of the at least two lateral sides. The invention also relates to a heat radiation assembly.

The invention relates to the technical field of locomotive power supply cabinets, and especially relates to a combined locomotive power supply cabinet which comprises a power supply cabinet. A plurality of first through holes are arranged in a left side and a right side of the power supply cabinet, T-shaped grooves are arranged above and below the first through holes, shells are arranged on one sides of the two T-shaped grooves, and a motor cavity is arranged in the side, close to the power supply cabinet, of each shell. T-shaped plates are arranged above and below the motor cavity, a second cylindrical groove is arranged in one end, close to the T-shaped plates, of one side of the shell, and a rectangular through groove is arranged in one side of the second cylindrical groove. A spring and a fixed column are arranged in the second cylindrical groove from inside to outside. A sliding block is arranged on the fixed column. A motor is arranged in the motor cavity, and an output shaft ofthe motor is provided with fan blades. Through arrangement of the shells, the motor cavity, the T-shaped plates, the second cylindrical groove, the spring, the fixing column, the motor and the fan blades, the shells can be fixed to one side of the power supply cabinet, the output shaft of the motor in the motor cavity drives the fan blades to rotate and blow air, and heat energy generated by a power supply in the power supply cabinet is rapidly dissipated.

In the prior art, hoisting mechanisms with the hook free falling function have two structures, wherein one structure is achieved by directly adding a sleeve outside a hoisting gear box and controlling the sleeve and a reel through a clutch, and the other structure is achieved by controlling high speed gear ring of the gear box through the clutch; non of the two structures has the wire rope anti-slip function, the wire rope is easy to detach and the rope is at mess; moreover, the conventional hoisting mechanisms have the designing problems of low work efficiency, high energy consumption, incomplete and loose structure, difficulty in manufacturing, high cost, and the like. According to the invention, a dry clutch is used to directly control the reel, so as to achieve the function of hook free falling; when the free falling hook is at work, non of a planet reduction gear, a wet multi-sheet brake, and a driving hydraulic motor is at work; the high-performance hook free falling hoisting mechanism is high in efficiency, low in energy consumption, and simple in structure, realizes wire rope anti-slip and protection function by controlling through a caliper disc brake; the high-performance hook free falling hoisting mechanism solves the congenital deficits of a conventional product in aspects of scheme, structure, and technology, and can excellently meet the requirement of a user in the particular aspect of energy conservation and emission reduction.

The invention discloses a semiconductor refrigeration device. The semiconductor refrigeration device comprises a box shell and an inner container arranged in the box shell. The inner container is provided with a semiconductor refrigeration module group, and the semiconductor refrigeration module group comprises a semiconductor refrigeration chip, a hot end radiator and a cold end radiator which are assembled together. The cold end radiator comprises a cold end heat conduction seat and first heat pipes connected with the cold end heat conduction seat, and the first heat pipes are attached to the inner container. The semiconductor refrigeration device is characterized in that the hot end radiator comprises a hot end heat conduction seat, second hot pipes, main heat dissipation wing pieces and an auxiliary heat dissipation seat; auxiliary heat dissipation wing pieces are formed on the auxiliary heat dissipation seat; the second hot pipes are provided with a plurality of main heat dissipation wing pieces; pipeline grooves are correspondingly formed in the relative installation faces of the hot end heat conduction seat and the auxiliary heat dissipation seat; and second heat pipe clampsare located between the hot end heat conduction seat and the auxiliary heat dissipation seat and are located in the pipeline grooves. Refrigeration efficiency improvement and energy consumption reduction of refrigeration equipment are achieved.

The invention discloses a handheld electric tool. The handheld electric tool comprises an output shaft, a motor, a fan, a shell and a braking device, wherein the output shaft is used for fixing a polishing disc; the motor comprises a driving shaft for driving the output shaft to rotate, and the driving shaft rotates around the central axis; the fan is fixed to the driving shaft and driven to rotate by the driving shaft; the shell is used for mounting the motor; and the braking device is used for braking the motor. The braking device comprises a fixed braking part and a movable braking part, wherein the fixed braking part is fixed to the driving shaft and rotates synchronously with the driving shaft; the movable braking part moves between a braking position and a separation position relative to the fixed braking part; at least two friction parts distributed in the circumferential direction of the central axis are arranged on the movable braking part; the friction parts are used for being in contact with the fixed braking part so as to brake the motor through friction force; a clearance groove is formed in the position, between the two adjacent friction parts, in the movable brakingpart in the circumferential direction of the central axis; and the fan rotates to drive an air flow to penetrate through the clearance groove. The handheld electric tool can conduct braking rapidly, the braking device has a good heat dissipation effect, and the service life is long.