40results about How to "Realize automatic heat dissipation" patented technology

The invention provides a safe and energy-saving lithium battery pack dual-mode thermal management system and method. The system comprises a battery pack, a battery pack shell, a liquid-cooling tube heat exchanger, and an external air-cooling fin with a fan. A micro heat pipe array is attached to the surface of a battery or a battery module, and a protruding portion of the micro heat pipe array isattached to the battery pack shell. The liquid-cooling tube heat exchanger is attached to the outer surface of the battery pack shell and is connected to an electric vehicle refrigeration system, anda substrate of the external air-cooling fin is attached to the outside of the liquid-cooling tube heat exchanger. According to the invention, the micro heat pipe array with high heat transfer and aircooling and liquid cooling modes are effectively combined, on one hand, the heat inside the battery can be effectively transmitted to the outside, the temperature is prevented from being too high, theuniform temperature of the battery is ensured, the heat dissipation efficiency is high, on the other hand, different systems are started in different states and temperatures, and the avoidance of thermal runaway and substantial energy savings are achieved.

The invention discloses a cooling type electrical cabinet with the adjustable inner space. The electrical cabinet comprises an electrical cabinet body. Through hole plates are plugged to the left and right side walls of the electrical cabinet body. Through holes are formed in the bottom wall of the electrical cabinet body. A first groove and a second groove are formed in the inner sides of the left and right walls of the electrical cabinet body respectively. A controller is arranged on the inner side wall of the top end of the electrical cabinet body. A pushing plate is arranged in an inner cavity of the electrical cabinet body. The bottom wall of one end of the pushing plate is fixedly connected with one end of a pneumatic cylinder. The cooling type electrical cabinet with the adjustable inner space is simple in structure, due to the addition of the pneumatic cylinder and the pushing plate, the pneumatic cylinder drives the pushing plate to move, and then the space in the electrical cabinet body is decreased; by means of the through hole plates and the through holes, air in the cavity in the electrical cabinet forms circular airflow, then, the cooling intensity is enhanced, and rapid cooling can be achieved; the pushing plate slides in the first groove and the second groove, deflection of the pushing plate is avoided, the side wall of the electrical cabinet body is abraded, and the service life of the pushing plate and the electrical cabinet body is prolonged.

The invention discloses a cooling system for new energy automobile battery packs, which relates to the technical field of heat dissipation of new energy automobile battery packs. An installation plateis arranged above a bottom plate, and the bottom plate and the installation plate are fixed by four cylindrical support pillars. A grid of a rectangular structure is arranged by embedding on the upper surface of the installation plate, and a box body is fixed at the position of the grid above the installation plate. The cooling system is novel in design, has an obvious effect, realizes automaticheat dissipation without excessive interference by people, and ensures that new energy batteries are at a safe operating temperature. Safety protection is added, and potential safety hazards are reduced. A mode of heat dissipation based on a heat dissipation fan and a mode of heat dissipation based on a water cooling system are adopted. A control system decides which mode of heat dissipation is started according to two set temperature thresholds, and energy is saved. The two modes can be combined for heat dissipation of batteries in summer, and the cooling effect is maximized.

The invention provides a dustproof heat dissipation smart home router, comprising a cover cap and a body. The cover cap comprises a cover body, a heat dissipation window and an insertion slot. The heat dissipation window is a rectangular through hole. The heat dissipation window is centrally located on the cover body. The insertion slot is peripherally located at the outer side of the heat dissipation window. The body comprises a shell, a pair of radio frequency antennas, a power jack, a power switch, a reset switch, a plurality of network interfaces, a plurality of state indicator lamps, an insertion sheet, a heat dissipation mechanism, a plurality of dustproof mechanisms and a circuit board. According to the dustproof heat dissipation smart home router, expanding angles of the heat dissipation vanes can be automatically adjusted according to working temperature in the router, the heat dissipation is good, moreover, the dust is effectively prevented from entering the router, the dustproof processing can be carried out for the unused network interfaces, a dustproof effect of the router is further improved, the working stability and reliability of the router are ensured, and the service life is prolonged.

The invention discloses an intelligent electric control cabinet and a working method thereof. The intelligent electric control cabinet comprises an intelligent electric control cabinet body; the intelligent electric control cabinet body comprises a cabinet body, a back plate bracket mechanism, a cooling fan, X-axis mounting brackets, a side sliding rail and a motor mounting slot; a lifting foot atthe bottom of the intelligent electric control cabinet body automatically adjusts the height of the cabinet body; the back plate mechanism inside the cabinet body is provided with the X-axis mountingbrackets; a moving block and a temperature sensor are arranged on the X-axis mounting bracket; when the internal temperature of the cabinet body is too high, the cooling space between electronic components is increased through automatically adjusting the distance between adjacent X-axis mounting brackets, the temperature sensor detects the internal temperature of the cabinet body, a control system controls the rotating speed of the cooling fan to control the internal cooling speed of the cabinet body; the device is reasonably designed, the space between the X-axis mounting brackets inside thecabinet body and the rotating speed of the cooling fan are realized through the control system, the internal part of the cabinet body is thus in a safe and stable working environment, and the safetyperformance of the electric control cabinet is improved.

The invention discloses a strong heat radiation type high-voltage switchgear. The switchgear comprises a high-voltage switchgear body, an air inlet which is arranged on the top board of the high-voltage switchgear body, an air outlet which is arranged on the bottom board of the high-voltage switchgear body, ventilating openings which are arranged on side boards of the high-voltage switchgear body, a cyclone air guiding device which is arranged in the high-voltage switchgear body, a fan which is arranged below the air inlet, a temperature sensor which is arranged in the high-voltage switchgear body, and a controller which is arranged on the high-voltage switchgear body. According to the strong heat radiation type high-voltage switchgear, through arranging the cyclone air guiding device, heat in the high-voltage switchgear body can be efficiently discharged in time; and through arranging the temperature sensor and the controller, automatic heat radiation of the high-voltage switchgear can be realized. The strong heat radiation type high-voltage switchgear has high heat radiation performance, thereby effectively protecting each inner element and prolonging service life of the high-voltage switchgear.

The case relates to a distribution cabinet, which comprises a cabinet body and a cabinet door which can be opened and closed and arranged on the cabinet body, The cabinet body comprises a ventilationtop cover, a bottom plate, a left side plate, a right side plate and a back plate; a temperature sensor, a humidity sensor and a dehumidifier are arranged on the inner surface of the back plate; a display is arranged on the outer surface of the cabinet door; the output ends of the temperature sensor and the humidity sensor are electrically connected with the display; The inner surface of the bottom plate is provided with a fan and a plurality of bags of desiccant. The outer surface of the cabinet door is provided with a first switch for controlling the start and stop of the fan and a second switch for controlling the start and stop of the dehumidifier. The cabinet body comprises a steel plate layer and a sound insulation layer fixed in the steel plate layer. The distribution cabinet of theinvention has high heat dissipation performance and good sound insulation effect, effectively protects internal components, improves safety performance and prolongs service life.

The invention relates to the field of virtual reality device manufacturing, and discloses a pair of VR glasses. The pair of VR glasses comprises a glasses body, a heat conduction component and a refrigeration component. The heat conduction component surrounds the edge of the glass body, and the refrigeration component is connected with the heat conduction component and provides a cold source for the glasses body. A heat dissipation structure with the combination of the refrigeration component and the heat conduction component is adopted, so that the heat dissipation efficiency of the edge of the glasses body and an inner cavity of the pair of VR glasses is greatly improved, the temperature on the edge of the inner cavity and the glasses body is lowered, the using comfortableness of the VR glasses is enhanced, the stability is ensured, in addition, due to the fact that the eyes need to be close to the edge of the glasses body when a user uses the VR glasses, the eyes of the user are likely to be uncomfortable when the user wears the pair of VR glasses for a long time, the edge of the pair of VR glasses body is effectively cooled, the temperature of eye sockets is effectively decreased, the user eye fatigue of the user is greatly relieved, and the experience comfort level is improved.

The invention provides a laser cutting laser head cooling device with high efficiency. The laser cutting laser head cooling device is characterized in that a water injecting wall 2 is arranged on a laser head outer wall 1; the shaft section of the water injecting wall 2 is circular; the lower end of the water injecting wall 2 is connected with the laser head outer wall 1 to form a bottom surface 3; multiple water spraying pipes 4 are upwards inclined on the bottom surface 3; the water spraying pipes 4 spray water at a constant speed; and a water sucking connection line 5 is arranged at the upper end of the water injecting wall 2, and is connected with a water sucking material 6. The water spraying pipes spray the water at the constant speed, so that the flowing water is contacted with the laser head outer wall for cooling; when the laser head is overheated, the water is quickly evaporated, so that the heat is sucked for cooling; when the water evaporation speed is slower, the redundant water is absorbed by the water sucking material through the water sucking connection line to realize automatic heat dissipation; and the flowing water accelerates the cooling speed, so that the cooling efficiency is high.

The invention relates to a special bulb for an LED lamp, comprising an external power connector and a bulb shell. The special bulb is characterized in that the bulb shell is a separable or connectable omnibearingly transparent pear-shaped whole consisting of a fully-transparent base body and a fully-transparent cover body, and the arc shoulder of the base body is provided with heat radiating holes. The special bulb for an LED lamp not only realizes illumination by using an LED light source and achieves the effect of energy saving, but also realizes automatic heat radiation through the heat radiating holes in the base body on the upper part of the bulb shell. Meanwhile, because the fully-transparent bulb shell structure is adopted, the special bulb can completely achieve an omnibearing illumination effect and eliminate dead zones in the illumination effect, and obviously, the structure provides a technical support for promoting the popularization of LED lamps and ensuring that the LED lamps are used by all families.

The invention belongs to the field of loudspeakers, and particularly relates to a large-aperture voice coil with good heat dissipation performance, which comprises a framework and a coil, the framework is arranged in the basin stand; a permanent magnet is fixedly connected to the interior of the basin frame; the inner bottom surface of the basin frame is fixedly connected with T iron; a coil is wound on the surface of the framework; a sound basin is arranged at the top of the framework; a connector is formed in the end face of one side of the framework, and the end face of the other side of the framework is inserted into the connector. A first elastic sheet is fixedly connected to the interior of the interface; the first elastic sheet is made of a memory alloy material; according to the invention, the automatic heat dissipation of the voice coil is effectively realized, when the voice coil works for a long time and a worker does not realize that the temperature of the voice coil is too high, the voice coil can be automatically accelerated to dissipate heat through the memory deformation effect of the first elastic sheet, and the problem that the temperature of the voice coil is too high, so that the loudspeaker is burnt and even open fire occurs is avoided.

The invention relates to a wind power generation device with an automatic heat dissipation effect. The wind power generation device comprises a base, a fixing box, a power generation mechanism, a collection mechanism and a heat dissipation mechanism, wherein the power generation mechanism comprises a power generator, a storage battery, a rotating rod and a rotating plate; the collection mechanism comprises a bearing seat, a storage plate and a guide plate; and the heat dissipation mechanism comprises a water spraying rod, a one-way valve, an abutting ring and a moving assembly. According to the wind power generation device with the automatic heat dissipation effect, water molecules in air are attached to the rotating plate and the guide plate, water drops are formed through cold and hot alternation, and then the water drops flow into a storage groove in the storage plate, so that water collection can be achieved under the condition of no raining; and when the rotating rod rotates for a long time, the bottom end of a water spraying pipe abuts against and rubs against a limiting ring to generate heat, so that water vapor is generated for water at the bottom end of the water spraying pipe, a sealing plate and a sealing ring are pushed, a generator is cooled, automatic heat dissipation of the generator is achieved through a pure mechanical structure, and the use practicability is improved.

The invention provides an active cooling battery box body which comprises a shell, wherein the shell comprises a first cavity and a second cavity, a battery partition, a temperature sensor and a microjet device are arranged in the first cavity, the battery partition is of a cuboid structure with a through hole, the temperature sensor and the microjet device are arranged on the battery partition, a control panel is arranged in the second cavity, the temperature sensor is connected to the input end of the control panel, and the microjet device is connected to the output end of the control panel. According to the active cooling battery box body, the temperature sensor and the microjet device are arranged in the battery box body, so that automatic cooling of the battery box body can be realized; the microjet device of small size is adopted, so that air flowing at small battery intervals is realized, the cooling speed is increased, the cooling effect of the battery box body is increased, and the service life of a single battery is prolonged.

The invention discloses a sludge discharge machine for sewage treatment. The sludge discharge machine structurally comprises a protective door, a cooling device, a host, a dredge pump, a toolbox, a host bottom plate, a movable frame, wheels and portable pull rods, the four wheels are mounted on the front side and the rear side of the movable frame in a fastened mode, and the portable pull rods arearranged at the front end of the movable frame and connected in the fastened mode. The sludge discharge machine has the advantages that the cooling device senses the protective door by the aid of a main transmission mechanism, a main transmission rod in the main transmission mechanism is driven after the protective door is closed and pressed down, electrification of an automatic starting device is controlled by a second transmission mechanism and a third transmission mechanism, an exhaust fan is started, an automatic cooling function is achieved, over-high temperature of internal parts is avoided, and the service life of the machine is prolonged.

The invention provides a self-radiating electronic cooling water pump which comprises a volute component, a rotor impeller component, a stator component, a control circuit board, and an end cover; thestator component comprises a housing and a stator part; the inside of the housing is divided into two parts by a partition plate; one part is provided with the stator part; the inside of the housingcorresponding to the stator part is provided with a rotor accommodating cavity; the rotor impeller component comprises a rotor part and an impeller part; the impeller part is fixed to the rotor part;the rotor part is placed inside the rotor accommodating cavity; the volute component is sealed at the other end of the housing to form a space; the impeller part is partially placed inside the space;the other part is sealed by the end cover to form another space; the control circuit board is placed in another space; a waterproof cup is arranged inside the rotor accommodating cavity; the outer wall of the body of the waterproof cup clings to a stator; one end of a rotor shaft of the rotor part is fixed to the bottom of the waterproof cup; and the other end of the rotor shaft is connected within a hole of a volute. The self-radiating electronic cooling water pump has the advantages of simple structure and good cooling effect.

The invention belongs to the technical field of rechargeable batteries, and discloses a universal battery pack system. The battery pack system comprises a battery pack and a charger. The battery pack comprises a battery pack upper cover and a battery pack lower casing. The battery pack upper cover and the battery pack lower casing form a casing after being engaged so as to protect battery pack elements inside. The universal battery pack system is characterized in that: the system also comprises a connector, the connector comprises a connector upper cover and a connecter lower cover, the connector upper cover is used for connecting power tools, and the connector lower cover is connected to the battery pack upper cover in a detachable manner. The system can be directly used for tools with the same interface manner so that the same battery packs can be used for the power tools with different brands, different model numbers and different types. In addition, the system has a function of automatic heat dissipation, thus guaranteeing the using safety of the battery pack.

The invention provides a dustproof communication cabinet, belongs to the technical field of electric power, and solves the problem that an existing communication cabinet cannot guarantee the dustproof effect while dissipating heat. According to the dustproof communication cabinet, an air supply pipe communicated with an equipment installation cavity is fixed to the upper portion of an air inlet cavity, an air spraying pipe is arranged in the equipment installation cavity and communicated with the air supply pipe, the lower portion of the air spraying pipe is located at the bottom of the equipment installation cavity, a plurality of air spraying heads are fixed to the lower portion of the air spraying pipe, and an air draft assembly is arranged on the upper portion of the air inlet cavity; a filter assembly located between the air inlet hole and the air supply pipe is arranged on the inner wall of the air inlet cavity and comprises a mounting frame fixed to the inner wall of the air inlet cavity in a sliding mode, a dust filter screen is arranged on the inner circumference of the mounting frame, a plurality of springs are arranged on the upper side of the mounting frame, the upper ends of the springs are connected with a supporting frame, and the supporting frame is fixedly connected with the inner wall of the air inlet cavity. According to the invention, the dustproof effect is improved while the heat dissipation effect is ensured, and the dust filter screen is convenient to clean.

The invention discloses a tunnel lamp having a cooling effect. The tunnel lamp comprises a shell (2) which comprises a top cap (21) in threaded connection and a light-transmission bottom cap (22) with the cross section being in an arc shape. The middle of the top cap (21) is provided with a cooling groove (23) with a downward opening. The cooling groove (23) is provided with a cooling plate (3) for sealing the opening. The cooling plate (3) is provided with a circuit board (4) which is provided with an LED light source (5). The side wall of the cooling groove (23) is provided with a light reflection piece (6). The top cap (21) is further provided with a mounting rack (24). The tunnel lamp can automatically cool, and is large in irradiation range and suitable for lighting of a long, narrow and dark tunnel.

The central air conditioner dynamic host controller comprises an air conditioner host body, a maintenance opening is formed in the surface of one side of the air conditioner host body, and a mounting plate is arranged in the maintenance opening. According to the invention, the temperature sensor fixed on the surface of the mounting plate can detect the temperature data of the area where the host controller is located in real time, then the temperature data is fed back to the PLC in the form of an electric signal, and when the detected temperature data is greater than the preset value of the PLC, the PLC starts the cooling fan mounted facing the host controller, so that the host controller is cooled. According to the air-cooled heat dissipation device for the host controller, the heat dissipation fan blows air to the host controller, air-cooled heat dissipation of the host controller is achieved, and the air-cooled heat dissipation device for the host controller has the advantages of automatic heat dissipation and reduction of heat dissipation power consumption; a gap is formed between the host controller and the mounting plate, and the ventilation effect after the host controller is mounted is improved.

The invention relates to the technical field of server design and provides a heat dissipation testing method and system for a GPU of a server. The method comprises the following steps: detecting a workstation of a test station of the GPU and determining whether a test workstation is conveyed to a corresponding tested GPU or not; when the to-be-tested GPU is conveyed to the test station of the GPU,calling a pre-configured automated heat dissipation test program and carrying out an automated heat dissipation test to the to-be-tested GPU; after the test is finished, automatically grabbing pressure log and temperature log to generate a heat dissipation test report of the GPU. Accordingly, an automatic test is carried out on heat dissipation of the GPU so as to provide accurate test data for adesign terminal. In the subsequent research and development phase, positioning, research and development and improvement directions are accurate, quick and favorable.

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet with a mechanical trigger switch. The power distribution cabinet comprises a power distribution cabinet body, a plurality of connector lugs are arranged on the power distribution cabinet body at equal intervals, and a water-cooling heat dissipation assembly is arranged in the power distribution cabinet body and comprises a heat dissipation mechanism and the mechanical trigger mechanism. The heat dissipation mechanism comprises a liquid cooling pipe, a condenser and a water pump, the liquid cooling pipe, the condenser and the water pump are all fixedly installed in the power distribution cabinet body, and the water pump and the condenser are connected through the liquid cooling pipe. According to the whole device, the temperature change in the power distribution cabinet body is monitored in real time, when the temperature reaches a certain value, the heat dissipation mechanism is automatically triggered through a linked mechanical structure to carry out liquid cooling heat dissipation work on the power distribution cabinet body, the traditional mode of manual monitoring and manual control of the heat dissipation mechanism is eliminated, the labor force is reduced, and the practicability is higher.

The invention relates to a town utility tunnel operation and maintenance management system, which comprises a master control center and a plurality of sub-control centers, the master control center is in communication connection with each sub-control center through a CAN bus, and at least two of the sub-control centers are in communication connection through a communication cable so that the two sub-control centers can respectively acquire the data condition of the opposite sub-control center; the sub-control center comprises a PLC control box arranged in the comprehensive pipe gallery, and a sub-control PLC, a display module, an information acquisition module, a video monitoring module, an alarm management module and a tracking module which are arranged on the PLC control box. When the system runs, the master control center can control each equipment and device in the corresponding area, the control of each equipment and device in the area can be automatically realized under the logic control preset in the sub-control PLC controller of each sub-control center, and meanwhile, the two mutually connected sub-control centers can share data, so that the data sharing is realized. And a visual global multi-point interactive operation and maintenance monitoring operation and maintenance mode of the urban comprehensive pipe gallery is realized.

The invention provides an electric appliance operating temperature control method and device and a storage medium. The electric appliance operating temperature control method comprises the following steps of: S1, obtaining the operating temperature of an electric appliance every preset time; S2, determining a first temperature threshold value according to the environment where the electric appliance is located; and S3, if the running temperature is greater than or equal to the first temperature threshold value, sending a running instruction to a cooling fan. The technical scheme provided by the invention aims to timely dissipate heat of a heating electric appliance through temperature control.

The embodiment of the invention discloses a distributed optical fiber sensor. The distributed optical fiber sensor comprises an optical fiber sensor body, a shell and a metal substrate; the optical fiber sensor body is fixed in the shell; heat dissipation holes and a filter screen are arranged on the side wall of the shell; a mounting groove and a welding groove are formed in the metal substrate; the mounting groove is used for mounting the shell; the welding groove is used for welding an object to be detected. According to the embodiment of the invention, the optical fiber sensor is fixed on the metal substrate through the shell, sensing optical fibers in the distributed optical fiber sensor are prevented from being broken in the use process, dust prevention and heat dissipation are realized through the heat dissipation holes and the filter screen, and the to-be-measured object is indirectly measured through the metal substrate, so that the sensing optical fibers are prevented from being broken, the measurement cost is reduced, heat dissipation and dust prevention can be achieved, the service life is prolonged, and the measurement precision of the distributed optical fiber sensor is improved.

The invention discloses an air-cooled mine transformer, which comprises a mounting plate, a protection box is fixed on one side of the mounting plate, both sides of the protection box are provided with limiting slots, and the opposite sides of the limiting slots are Slide grooves are provided on the side walls, a moving block is installed in the limiting groove, a cavity is arranged in the moving block, and two rotating rods are installed in the cavity, and the two sides of the rotating rod Rollers are all provided, and the rollers are located in the chute, a first gear is arranged on one of the rotating rods, a driving device is fixed at the bottom of the cavity, and a second gear is fixed at the end of the output shaft of the driving device, and The first gear and the second gear mesh with each other, and a support frame is fixed on the upper ends of the two moving blocks, and an arc-shaped slide groove is arranged on the support frame. The invention realizes the automatic heat dissipation treatment of the transformer through the combination of the driving device, the gear, the adjustment mechanism and the blower, not only improves the heat dissipation efficiency, but also facilitates adjustment and is suitable for popularization.

The invention provides a unfreezing structure for a refrigerator, a unfreezing method, the refrigerator and a storage medium. The unfreezing structure for the refrigerator comprises a box body, a condensation frame arranged on the upper end face of the box body, and a unfreezing drawer arranged on the condensation frame; the condensing frame comprises an inlet end and an outlet end, the inlet endis connected with a compressor in the box body, and the outlet end is connected with an evaporator in the box body; the condensation frame is used for dissipating heat when the compressor is in a starting state, and unfreezing a to-be-thawed item in the unfreezing drawer. According to the unfreezing structure, the condensation frame is arranged for dissipating heat and transmitting the heat to theunfreezing drawer, and the condensation frame is connected with the box body, so that the condensing frame is automatically dissipated during operation of the box body, the condensation frame does not need to be separately powered, and the use of electric quantity is saved.

The invention discloses a novel self-heat-dissipation wire cable which comprises a protection layer; a separation part which comprises a separation main body and three separation walls, wherein the separation main body is located at the axis position of the protection layer, the cross section of the separation main body is circular, and the separation walls extend to be fixedly connected with theprotection layer; three accommodating spaces which are defined by the separation part and the protection layer; the three strands of conductive wires are respectively positioned in the three accommodating spaces; and heat conduction walls which are located in the three containing spaces, wherein the heat conduction walls are made of metal heat conduction materials, and each heat conduction wall comprises an arc-shaped first section which extends along the separation main body and is attached to the surface of the separation main body and an arc-shaped second section which extends along the outer surface of the insulation layer and is attached to the insulation layer; two ends of the second section are connected to the two ends of the first section respectively, and the second section is partially embedded into the protection layer. Compared with the prior art, the novel self-heat-dissipation wire cable is long in service life and good in reliability.

The invention discloses an internal heat dissipation type direct-current brushless motor and a handheld lithium battery tool. The brushless motor comprises: a rotor, wherein the rotor comprises a rotating shaft, a rotor iron core covering the central part of the rotating shaft, a commutator, and a gasket; a stator arranged on the outer side of the rotor iron core in a sleeving manner, wherein thestator comprises a stator iron core and a stator winding; and a first cooling oil storage tank and a second cooling oil storage tank, wherein the first cooling oil storage tank is connected with the stator iron core and the rotating shaft and then communicates with the second cooling oil storage tank. The rotating shaft is provided with a through oil way channel, a first oil way opening and closing device and a second oil way opening and closing device are arranged at the two ends of the rotating shaft, and the on-off state of the oil path can be automatically switched along with the rise of the temperature, so that automatic heat dissipation of the motor can be realized, the motor does not need to carry a fan and other heat dissipation assemblies, the handheld lithium battery tool using the motor is not provided with a heat dissipation port, the internal structure is simplified, and meanwhile, the dustproof and noise reduction effects are better.