46results about How to "Avoid the problem of taking up a lot of space" patented technology

The invention discloses a spraying method of an automatic spraying unit for a thin-long structure work piece. According to the method, an automatic spraying unit is arranged at the butt joint positionof two adjacent conveying sections of a conveying line, the unit comprises a box type cover, a coating waste gas recycling device, a spraying device and a spraying electric control device, wherein the length size of the box type cover in the front-back direction is far smaller than the length size of a thin-long structure work piece. According to the spraying method of the automatic spraying unitfor the thin-long structure work piece, conveying and spraying are carried out on the thin-long structure work piece at the same time through a relay method, so that only a local range of the thin-long structure work piece is covered by the box type cover, and the problem that the occupied space of a traditional integral spraying room is large is solved, and meanwhile, the uniformity of coated layers can be ensured on the premise that intelligent spraying operation on the thin-long structure work piece is realized, so that the method is suitable for the spraying process of the thin-long structure work piece, and is particularly suitable for the spraying process of a net rack connecting rod.

The invention relates to a pole piece and a preparation method thereof and an application of the pole piece in a battery. The mass content of the conductive agent in the first active material layer iscontrolled to be greater than the mass content of the conductive agent in the second active material layer; the concentration of the conductive agent in the pole piece is in longitudinal gradient distribution, so that the content of the conductive agent in the lower active material layer close to the current collector is high, more conductive paths can be formed due to the high content of the lower conductive agent, the electron transmission resistance of the pole piece is low, and the rate performance and the cycling stability of the battery are improved. A double-cavity die head coating machine is used for coating two kinds of slurry at the same time, the problem that the occupied space is large due to the fact that two coating machines are used for coating at the same time is solved, meanwhile, the double-cavity die head coating machine can be operated by only one person, and the labor cost is reduced; moreover, two kinds of slurry are coated at the same time, so that the problem of poor compatibility between layers caused by separate coating (drying after bottom layer coating and top layer coating again) in the prior art is solved.

The invention relates to a vision measurement test platform, which comprises a horizontally arranged base and a vertical bracket arranged on the base, wherein the vertical bracket is equipped with twooverhanging arms with the position being adjustable along the horizontal direction, and the two overhanging arms include a first overhanging arm and a second overhanging arm; the first overhanging arm is provided with a first camera and a laser, the second overhanging arm is provided with a second camera used for being matched with the first camera for binocular vision measurement and a third camera used for being matched with the laser for structured light measurement; and the base is provided with a first object stage used for moving opposite to the two overhanging arms in the horizontal direction so as to realize the structured light measurement. The vision measurement test platform can carry out multiple test tasks including monocular vision measurement, binocular vision measurement and structured light measurement through the two overhanging arms with the position being adjustable along the horizontal direction, and has the advantages of high practicability, strong applicabilityand high automation degree.

The invention discloses an automatic spraying drying production system of a net rack connecting rod. The system comprises a workpiece online and offline unit, an automatic spraying unit, a workpiece transfer unit, an automatic drying unit and a concentrated electric control unit; accurate coordinate grabbing of a net rack connecting rod workpiece is achieved through the manner that a transfer mechanical arm and a transfer grabbing stacking mechanical arm grab a following carrying frame, a drawer type workpiece containing frame and an auxiliary transfer frame are in abut joint, a workpiece stacking tray transverse moving control mechanism pulls out or pushes in a workpiece stacking tray to enable the net rack connecting rod workpiece to be transferred, in the spraying work process, throughthe feeding manner, the net rack connecting rod workpiece is sprayed while being conveyed, a box cover only covers the local range of the net rack connecting rod workpiece, the problem that a traditional whole spraying room occupies large space is solved, coating uniformity is ensured on the premise of achieving multi-time intelligent spraying and drying of the net rack connecting rod workpiece, and the system is particularly suitable for net rack connecting rod spraying and drying procedures.

The invention provides a mechanical loading tool for an outer grid wallboard. The mechanical loading tool comprises a clamping plate type mold and a movable loading system, wherein the clamping plate type mold comprises a mold base, a transverse clamping plate and a pressing plate; the movable loading system comprises loading system bases, pressurizing movable components, loading rod components and positioning connection structures; the loading system bases are arranged at the left side and the right side of the clamping plate type mold, and the positioning connection structure is arranged at one side of each loading system base; two groups of pressurizing movable components are arranged on each loading system base; the pressurizing movable components at the left side and the right side are connected through the loading rod components; and each pressurizing movable component comprises a first hydraulic cylinder. The invention further provides a mechanical loading method for the outer grid wallboard, and the method adopts the mechanical loading tool for the outer grid wallboard. According to the tool and the method, some defects of loading of a traditional mechanical method are avoided, the cost is greatly reduced, and a movable loading system is matched with an adjustable molded surface to meet the production requirements of wallboards of multiple specifications.

The invention provides a buffer strip dispensing process for assembling a liquid crystal television and the liquid crystal television. The process includes the steps that a dispenser is adopted to conduct dispensing on a frame body and spread glue on the periphery of the frame body to form a sealed rounded rectangle; the dispensed and coated frame body is solidified through a solidifying device, and the solidifying time ranges from 4s to 10s; the solidified frame body and components to be assembled are assembled. By means of the buffer strip dispensing process, the assembly efficiency is improved greatly, the product yield is increased greatly, the manual cost is lowered, and the problem that the occupied space is large by means of a liquid crystal glass side edge silica gel dispensing process is further avoided; furthermore, a product assembled through the buffer strip dispensing process has excellent reworkable performance, assembled liquid crystal glass and adhesive tape have the friction function without bonding, and thus the glass fragmentation phenomenon of the liquid crystal glass side edge silica gel dispensing process is avoided.

The invention provides a switching power supply and a control method thereof. In the switching power supply, electric energy received by a control power supply end of a main circuit is from a first starting circuit and a second starting circuit, and the main circuit, the first starting circuit and the second starting circuit take electricity from a direct current bus of an inverter in a system where switching power supply voltage is located; the direct current bus voltage value required for starting control function in the main circuit by the second starting circuit is lower than the direct current bus voltage value required for starting control function by the first starting circuit, so that when the voltage of the direct current bus is smaller than the direct current bus voltage value required for starting the control function in the main circuit by the first starting circuit, the second starting circuit can also provide control power for the main circuit to ensure the start of the control function in the main circuit so as to start the main circuit when the voltage of the direct current bus is low; and when the inverter is shut down for maintenance through the working energy consumption of the main circuit, the safety of maintenance operation in the release of electric energy on the direct current bus is improved.

The invention relates to the technical field of textile fabric, and discloses a cutting fixing device for preventing trimming and thread running of textile fabric. The cutting fixing device comprisesa workbench, wherein the middle part of a fixing frame is connected with a stop key, the middle part of a working rod is provided with a stop block, the outer side of the working rod is connected witha U-shaped frame, an intermittent device comprises a rectangular groove, a moving groove and a switch, the intermittent device is internally connected with an incomplete gear, a pressing device comprises an inclined hole, a one-way valve and a soft cushion, and the pressing device is internally provided with a heating wire. The intermittent device continues to move downwards, high-temperature gasinside the pressing device is further compressed, and when the intermittent device moves to the lowest end, the incomplete gear extrudes the switch, the gas in the pressing device is sprayed out at ahigh speed through the inclined hole, and the high-temperature and high-speed gas performs heat shrinkage on a forked fiber bundle at the textile fabric. The structure solves the problems that existing textile fabric is poor in cutting quality, the fabric is easy to move during cutting, the trimming is forked and the thread runs.

The embodiment of the invention provides a sending method, sending system, receiving method and receiving system of an email and a mail system. The email includes a mail header and mail content. The method includes the following steps that: a server-side receives the mail header submitted by a sending end, wherein the server-side includes a server and / or a could end, and the mail header includes receiving end information; the server-side sends a mail content acquisition request to a sending end and sends the mail header to a receiving end indicated by the receiving end information; and the server-side receives the mail content which is submitted by the sending end according to the mail content acquisition request. With the sending method, sending system, receiving method and receiving system of the email and the mail system of the invention adopted, occupation of the server or the computer of a recipient can be decreased, and email receiving and sending speed can be increased, and therefore, difficulty in successfully sending and receiving the email can be lowered, and the security and privacy of the use of the email can be improved.

The invention discloses an automatic spraying production line for an elongated structure workpiece. The automatic spraying production line comprises a digital conveying unit, an automatic spraying unit, an automatic drying unit and a centralized electric control unit, the digital conveying unit comprises a conveying line, a workpiece grabbing and stacking device, a follow carrying frame and a conveying electric control device, the automatic spraying unit is arranged in a process working area of the conveying line and comprises a box type cover, a coating waste gas recovery device, a spraying device and a spraying electric control device, the automatic drying unit is arranged in the process working area of the conveying line and comprises a drying bin and a drying electric control device, and the centralized electric control unit comprises a central controller, a digital conveying unit control loop, an automatic spraying unit control loop and an automatic drying unit control loop. According to the automatic spraying production line, the automation degree is high, the uniformity of a coating can be ensured on the premise of achieving intelligent spraying operation on the elongated structure workpiece, and the is suitable for the spraying process of the long and thin structure workpiece, and the production line is particularly suitable for the spraying process of a net rack connecting rod.

The invention discloses a solar glass tube impregnation and baking production line. The production line comprises an oven, an impregnation chamber, a feeding rail, a transposition rail, carrying traveling trolleys, a transposition traveling trolley, a turnover device, a hanging jig, a first conveying rail and a second conveying rail; the turnover device comprises a base, a rotating frame and a pushing mechanism; the hanging jig can be slidably connected with the upper end of the rotating frame; the lower end of the hanging jig is connected with a hanging piece; a pipe fitting top clamping device is arranged at the lower end of the rotating frame; two ends of the transposition rail respectively extend to the first conveying rail and the conveying rail; a discharging end of the first conveying rail and a feeding end of the second conveying rail are arranged in the impregnation chamber; the carrying traveling trolleys are arranged on the feeding rail, the first conveying rail and the second conveying rail respectively; the transposition traveling trolley is arranged on the transposition rail; each carrying traveling trolley is provided with a suspension structure; and the transposition traveling trolley is provided with a transposition structure. According to the production line, the automation degree of pipe fitting transportation can be improved, the production efficiency is improved, and the space occupied by pipe fitting transportation is reduced.

The invention discloses a star map identification method based on a simplest general subgraph, which comprises the steps of establishing an angular distance database, specifically including selectionof navigation stars, establishment of the angular distance database and establishment of an index table; selecting to-be-identified observation stars, sequentially defining one of the observation stars as a main star, recording matching results of angular distances from the main star to the remaining stars and navigation star pairs in the database through two rounds of voting, and preliminarily screening candidate stars of the observation stars; sequentially taking the highest ticket candidate star of each observation star, determining the highest ticket candidate stars as a matching group ofthe main star, selecting the simplest general subgraph according to the size of the matching group, and then constructing an isomorphic subgraph on the basis of the matching group; and taking two stars of the isomorphic subgraph, determining a rotation matrix and an attitude angle by utilizing double-vector attitude determination, verifying the isomorphic subgraph through reprojection, and outputting an identification result of the observation star. The method inherits the reliability of a polygon algorithm and the high efficiency of a group matching algorithm, and has good robustness for starpoint position noise, star magnitude noise and artificial stars.

The invention discloses a medical infusion bottle recycling device with a heat shrinkage function. The medical infusion bottle recycling device comprises a box body, wherein a base is arranged below the box body; rollers are symmetrically arranged at the left side and right side of the base and are used for conveniently carrying the device; support sleeves are symmetrically arranged at both sidesof the upper end of the base; a support rod is slidably arranged at the upper end of each support sleeve; the upper end of each support rod is fixedly connected with the bottom part of the box body; abuffer spring is arranged in each support sleeve, and is used for fixing the corresponding support rod and the support sleeve; an accommodation box is arranged in the box body, and is of a rectangular structure of which the upper end is provided with an opening; pulleys are arranged at the bottom part of the accommodation box; the bottom part of the interior of the box body is provided with slidegrooves which are matched with the pulleys. The medical infusion bottle recycling device has the advantages that the problem of larger occupation space of the complete bottle is solved; in the working process, the air in the box body is sucked out by an air suction fan, and penetrates through a purifying box and a disinfecting box, so as to complete filtering and disinfecting, thereby avoiding the problem of pollution to air by the internal air in the box body; meanwhile. the quality of the surrounding air is also improved, and the practicality is high.

The invention discloses a wireless earphone detection method and detection device. The wireless earphone detection method comprises the steps that an earphone box directionally transmits a wireless signal with the frequency of f1, and a wireless earphone directionally transmits a wireless signal with the frequency of f2; and the wireless earphone and / or the earphone box directionally receive / receives the wireless signal, performs frequency analysis on the received wireless signal, and judges the state of the wireless earphone according to the frequency of the received wireless signal. The invention discloses a wireless earphone detection method. The wireless earphone detection method controls the earphone box and the wireless earphone to emit wireless signals respectively, wherein when theearphone is in different states, the receiving signals are different, and the wireless earphone detection method analyzes and determines the state of the wireless earphone. The wireless earphone detection method avoids the problem that the occupied space is large due to the fact that a Hall element is arranged, and the wireless signals transmitted and received by the wireless earphone have the communication function, and communication information can be carried through the signals, thus facilitating pin saving.

The invention provides an electrical cabinet, belonging to the technical field of power equipment. The electrical cabinet comprises a box body, an air blowing assembly, an air draft pump, a cleaning assembly and a driving assembly, wherein the box body comprises an outer box and a plurality of mounting plates; an air inlet and an air outlet are formed in the side wall of the outer box; the air blowing assembly is located in the air inlet and connected with the side wall of the box body; the air outlet of the air blowing assembly communicates with the interior of the box body; the air draft pump is located at the air outlet and connected with the side wall of the box body; the cleaning assembly comprises a plurality of brushes, the brushes and the plurality of mounting plates are arranged in a one-to-one correspondence mode, the brushes are rotatably located in the outer box and located above the corresponding mounting plates, and the rotating axes of the brushes are perpendicular to the mounting plates; the driving assembly is connected with the outer side wall of the outer box, and the driving assembly is used for driving the air draft pump to extract air in the outer box and driving the multiple brushes to rotate. The electrical cabinet can efficiently remove dust on electrical elements.

The invention discloses a double-slot hand washing sink for a kitchen. The double-slot hand washing sink comprises a slot body formed in a mounting base, wherein the slot body is composed of a half slot I and a half slot II; a drain outlet and a water drainage hole are separately formed in the lower side wall of the half slot I and the lower side wall of the half slot II; the lower side wall of the mounting base is fixedly equipped with a support base; a transverse plate is fixedly connected on the outer wall of the support base; a pedal is arranged on the upper side wall of the transverse plate; the lower side wall of the pedal is fixedly connected to a push rod which penetrates through the transverse plate; a telescopic spring is fixedly connected between the lower side wall of the pedaland the upper side wall of the transverse plate; a rotary plate is rotatably connected on the outer wall of the support base; and the lower side wall of the mounting base is inserted with a verticalplate at the upper side of the rotary plate. While a user steps the pedal, the slot body is pushed out, so that the slot body is retracted while the user leaves and is pushed out in use, and is retracted while not used, and therefore, automation degree is high, and the problem that slot body pollution is caused as the conventional slot body is exposed to occupy space and greasy dirt dust drops isavoided.

The invention discloses a display device suitable for outdoor learning. The display device comprises a machine body, an intelligent digital pen and a body rear cover, a drawing board is fixedly arranged above the machine body; a double-key eraser key, a double-bond mobile canvas key, a double-key canvas full-screen key, a double-key back-off button, a view amplification key and a view reduction key are fixedly arranged on one side of the drawing board; and a pen groove is fixedly formed in one side of the machine body. A buckle is fixedly arranged on one side of the pen groove, one end of thebuckle is connected to the front surface of the machine body; and a machine body rear cover is fixedly arranged on the back surface of the machine body; a circuit board is fixedly arranged in the rearcover of the machine body, a wireless module battery storage position, a refill replacing device, an integrated standby pen point box, a wireless module storage position and a wireless module receiver are fixedly arranged on one side of the circuit board, and the pen for drawing can be fixed to a drawing board, is not prone to being lost and is convenient to store and take.

The invention discloses a portable plastic shower box. The portable plastic shower box comprises a first box body, a hinge is fixedly connected to one side of the bottom of the first box body, a second box body is fixedly connected to the side, away from the first box body, of the hinge, and a fixed plate is fixedly connected to the middle portion of the bottom of the inner wall of the first box body. Storage boxes are fixedly connected between one side of the fixed plate and the inner wall of the first box body, a first partition plate is fixedly connected between the opposite two sides of the inner wall of the first box body and located at the top of the storage box, a first fixing net is fixedly connected between the top of the first partition plate and the inner wall of the first box body, sliding grooves are formed in the opposite two sides of the inner wall of the second box body, fixing devices are slidably connected to the surfaces of the sliding grooves, and second partition plates are fixedly connected to one sides of the fixing devices. The invention relates to the technical field of plastic products. The portable plastic shower box solves the problems that a current carrying shower box cannot be waterproof in the shower, and bottles of shower products are bulky and inconvenient to carry.

The invention relates to the technical field of helmets, in particular to a folding helmet, which comprises a rotating shaft and a plurality of arc-shaped pieces, one end of each arc-shaped piece is aconnecting end, and the other end of each arc-shaped piece is a free end. The connecting ends of the arc-shaped pieces are rotationally connected to the rotating shaft; when the folding intelligent helmet is stored, the multiple arc-shaped pieces are arranged in an up-down overlapping mode; through the multiple arc-shaped sheets and the rotating shaft, the arc-shaped sheets and the rotating shaftcan be overlapped up and down to form an arc-shaped block during storage, folding and storage can be facilitated, and the problem that a traditional helmet is large in occupied space is solved; therefore, during use of the helmet, a dome shape attached to the top of the head can be formed.

The invention discloses a partitioned side wall friction stir welding integration universal fixture, and relates to the technical field of subway vehicle side wall auxiliary welding equipment. The partitioned side wall friction stir welding integration universal fixture comprises a fixture body, a movable compression mechanism, a plurality of horizontal compressors, a plurality of C-shaped clampsand a plurality of vertical compressors, wherein the fixture body comprises a plurality of beams arranged in a parallel mode, a plurality of girders arranged in a parallel mode, a plurality of laterallimiting plates, a plurality of horizontal compressor mounting seats, a plurality of vertical compressor mounting seats and a plurality of connection seats, and the movable compression mechanism comprises a plurality of door-shaped frames, a vertical lead screw mechanism and two linear guide rails. By using the partitioned side wall friction stir welding integration universal fixture, a worker only needs to complete one-time clamping and fixing operation for the partitioned side wall friction stir welding integration universal fixture and an operation platform, and then the partitioned side wall friction stir welding integration universal fixture can adapt to clamping and positioning requirements of all wall board welding steps, the worker only needs to clamp the operation platform on different positions of the partitioned side wall friction stir welding integration universal fixture in different welding steps, time and labor are saved, and work efficiency of side wall friction stir welding is greatly improved.

The invention discloses a using method of an elongated structure workpiece automatic spraying production line. The production line comprises a digital conveying unit, an automatic spraying unit, an automatic drying unit and a centralized electric control unit, wherein the digital conveying unit comprises a conveying line, the workpiece grabbing and stacking device comprises an accompanying supporting frame and a conveying electric control device, wherein the automatic spraying unit is arranged in a working region of a working procedure of the conveying line, a coating waste gas recycling device, a spraying device and a spraying electric control device, the automatic drying unit is arranged in a working area of a working procedure of the conveying line and comprises a drying bin and a drying electric control device, the centralized electric control unit comprises a central controller, a digital conveying unit control loop, an automatic spraying unit control loop and an automatic drying unit control loop. The device and the method have the advantages that the automation degree is high, the uniformity of the coating can be ensured on the premise of achieving intelligent spraying operation on the slender structure workpiece, the spraying process for the long and thin structure workpiece is particularly suitable for the spraying process of the net rack connecting rod.

The invention discloses a monitoring data acquisition system and method for an injection molding machine in a monitoring process, and relates to the field of injection molding machines, and the system comprises a monitoring information setting module which is used for setting monitoring data needing to be acquired in the monitoring process; the cache module is used for storing latest monitoring data of the injection molding machine in a preset duration in the monitoring process; the solid storage condition setting module is used for setting a triggering condition for keeping the latest monitoring data to the database; the storage time setting module is used for setting a pre-triggering period and a post-triggering period, the sum of the pre-triggering period and the post-triggering period is equal to a preset duration, and when a triggering condition is met, the latest monitoring data is stored in a database at the last moment of the post-triggering period; according to the method, the device and the system, the problem that in the prior art, most of the monitoring data are kept in real time, no trigger storage mechanism exists, and consequently the occupied memory space is large is solved.

The invention relates to an alloy plate perforating device convenient to clean. The alloy plate perforating device comprises a base, support rod, a transverse rod, a perforating mechanism, an overturning mechanism and a clamping mechanism, wherein the transverse rod is arranged above the base through the support rod; the perforating mechanism is arranged on the transverse rod; the overturning mechanism is arranged on the base; the clamping mechanism is arranged on the overturning mechanism; the perforating mechanism comprises a cylinder and a drill bit; the cylinder is arranged on the transverse rod vertically downwards; and the drill bit is arranged on the cylinder. According to the alloy plate perforating device convenient to clean, clamping of a workpiece is realized through the clamping mechanism, perforation of the workpiece is realized through the perforating mechanism, and overturning of the clamping mechanism is realized through the overturning mechanism, so that the base is convenient to clean. Compared with an existing clamping mechanism, the clamping mechanism adopts flexible clamping, so that scratches to the surface of the workpiece by rigid clamping is avoided. Compared with an existing overturning mechanism, the overturning mechanism adopts vertical overturning, so that the problem of occupation of large space in transverse movement is solved, and the practicability is enhanced.

The invention relates to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle for circuit inspection and measurement. The vehicle comprises an unmanned aerial vehicle body, a groove is formed in the top end of the unmanned aerial vehicle body; a connecting base is arranged on one side of the unmanned aerial vehicle body, a fixed support rod is arranged on one side of the connecting base, a movable support rod is arranged at one end of the fixed support rod, a supporting rod is arranged at the bottom end of the unmanned aerial vehicle body, a supporting column is arranged at the lower end of the supporting rod, a bottom plate is arranged at the bottom end of the supporting column, and a heat dissipation box is arranged on the front surface wall of the unmanned aerial vehicle. In the unmanned aerial vehicle for circuit inspection measurement, a fixed plate, a first movable groove, a handle and a protective sleeve are additionally arranged in a groove;a user holds the handle to move the unmanned aerial vehicle body to a working place, the problem that a traditional unmanned aerial vehicle body is not provided with a handle, the surface of the traditional unmanned aerial vehicle body is smooth, so that the traditional unmanned aerial vehicle body is inconvenient for the user to take and easily falls onto the ground during carrying is solved, and the unmanned aerial vehicle body is convenient to carry and more convenient to use.

The invention relates to a low-voltage power take-off system. The low-voltage power take-off system comprises a solar energy power take-off device, a current transformer power take-off device, an AC / DC conversion circuit module, a ternary battery charging controller and a ternary battery module. A solar energy power take-off device is used for converting solar energy into electric energy; The current transformer power take-off device is used for electrically connecting with the incoming cable of the distribution network switch room; The AC / DC conversion circuit module is arranged in series with the current transformer power fetching device; The ternary battery charging controller is electrically connected with the solar energy power fetching device and the AC / DC conversion circuit module respectively. The ternary battery module and the ternary battery charging controller are arranged in parallel. When both the current transformer and solar energy devices lose power, the three-element battery module automatically supplies power to the equipment load and can last for 6- 7 hours to meet the daily power demand of the equipment load.

The invention discloses an automatic spraying drying production system of a net rack connecting rod. The system comprises a workpiece online and offline unit, an automatic spraying unit, a workpiece transfer unit, an automatic drying unit and a concentrated electric control unit; accurate coordinate grabbing of a net rack connecting rod workpiece is achieved through the manner that a transfer mechanical arm and a transfer grabbing stacking mechanical arm grab a following carrying frame, a drawer type workpiece containing frame and an auxiliary transfer frame are in abut joint, a workpiece stacking tray transverse moving control mechanism pulls out or pushes in a workpiece stacking tray to enable the net rack connecting rod workpiece to be transferred, in the spraying work process, throughthe feeding manner, the net rack connecting rod workpiece is sprayed while being conveyed, a box cover only covers the local range of the net rack connecting rod workpiece, the problem that a traditional whole spraying room occupies large space is solved, coating uniformity is ensured on the premise of achieving multi-time intelligent spraying and drying of the net rack connecting rod workpiece, and the system is particularly suitable for net rack connecting rod spraying and drying procedures.

The invention provides a metal wet mold. The metal wet mold comprises a framework, a plurality of wrinkled heat-dissipation sheets I and a plurality of wrinkled heat-dissipation sheets II, wherein thewrinkled heat-dissipation sheets I are provided with wrinkled structures I; the wrinkled heat-dissipation sheets II are provided with wrinkled structures II; both the wrinkled structures I and the wrinkled structures II are arranged obliquely; the wrinkled heat-dissipation sheets I and the wrinkled heat-dissipation sheets II are arranged in the framework alternatively; and adjacent wrinkled structures I and wrinkled structures II are in a crossing state. Hot water flows into spaces between the wrinkled structures I and the wrinkled structures II from top to bottom, and comes into continuous contact with the wrinkled structure I and the wrinkled structure II in a falling process, so that the surface areas of the wrinkled structures I and the wrinkled structures II are increased compared with a planar structure; the heat-dissipation area is increased; and good hot water cooling effect is achieved. Gaps are formed between the wrinkled structures I and the wrinkled structures II, so thatsurrounding flowing air can pass through the gaps for taking the heat of the hot water, the wrinkled heat-dissipation sheets I and the wrinkled heat-dissipation sheets II away, and the cooling speed is increased.

The present invention provides a switching power supply and its control method. In the switching power supply, the sources of electric energy received by the control power supply end of the main circuit include a first starting circuit and a second starting circuit. The main circuit, the first starting circuit and the second starting circuit The two starting circuits are powered by the DC bus of the inverter in the system where the switching power supply voltage is located; and the DC bus voltage value required by the second starting circuit to start the control function in the main circuit is lower than that of the first starting circuit; therefore, in When the voltage of the DC bus is lower than the DC bus voltage value required by the first starting circuit to start the control function in the main circuit, the second starting circuit can also provide control power for the main circuit to ensure the start of the control function in the main circuit. When the DC bus voltage is low, the main circuit can be started; and then the energy consumption of the main circuit is used to realize the release of electric energy on the DC bus when the inverter is shut down for maintenance, improving the safety of maintenance operations.