58results about How to "Uniform conduction" patented technology

The invention discloses a method for preparing a metal casting mold based on steel grit 3D printing, and belongs to the technical field of metal casting mold machining. In order to solve the technical problem that in the prior art, the mechanical strength and collapsibility of a metal casting mold need to be further improved, the method for preparing the metal casting mold based on steel grit 3D printing comprises the following steps that a sand mold three-dimensional model is established according to a metal casting, then casting mold steel grit is filled in an operation box of sand mold 3D printing equipment, and the casting mold steel grit is obtained; the binder storage tank is filled with a binder; and according to the section formation of the sand mold three-dimensional model, a sand paving system of the sand mold 3D printing equipment paves cast steel sand on a printing platform. The casting steel sand and the binder are matched with each other, the metal casting mold blank is prepared through 3D printing and then dried, the normal-temperature mechanical property and high-temperature property of the metal casting mold are effectively improved, the application range of the metal casting mold is widened, and meanwhile the collapsibility of the metal casting mold is improved.

The utility model relates to a tool for testing a semiconductor device, which aims at solving the technical problems that the pressing force is inconvenient to control and the contact pressure between a chip and a pin is easy to be overlarge and further the chip is damaged in the current mode of manually pressing a clamping bracket, and comprises a test assembly of which the upper end surface is detachably provided with a test part, a tray assembly is detachably installed at the top of the testing part, the testing part comprises a testing plate, buffer mechanisms are fixedly arranged on the upper end face of the testing plate at equal intervals, positioning holes are formed in the four corners of the upper end face of the testing plate, and the buffer mechanisms are used for achieving the buffer effect when a chip is pressed down for detection. Positioning holes are formed in the upper end face of the tray body, positioning inserting rods which are inserted into the positioning holes in a matched mode to achieve the positioning effect are arranged at the four corners of the lower end face of the tray body, the buffering mechanism comprises V-shaped elastic pieces which are symmetrically arranged in a crossed mode, the V-shaped elastic pieces are connected, and the chip pressing detection device has the advantage of achieving the buffering effect in the chip pressing detection process.

The application belongs to the technical field of lithium batteries, and discloses a gel electrolyte taking a functionalized two-dimensional MXene material as a dispersant as well as a preparation method and application of the gel electrolyte. The gel electrolyte comprises a functionalized MXene material and a basic electrolyte; the functionalized MXene material is obtained by the following method: 1) treating a MAX phase material with a solution containing HCl and LiF, intercalating, peeling off, and then reacting with a diazonium salt solution to obtain a sulfonic acid functionalized MXene material. The application further discloses a preparation method of the gel electrolyte. The application reconstructs a lithium ion solvation structure, reduces a desolvation energy barrier, homogenizes a bulk phase electric field and ion flow, cooperatively induces formation of a stable SEI interface rich in inorganic species, significantly inhibits lithium dendrite growth, and improves interface kinetic stability. The method is simple and low in cost. The electrolyte is used in a lithium metal battery and exhibits excellent cycle performance.

The utility model discloses a novel intelligent dazzle lamp sound box, which comprises a transparent sphere, an in-sphere magnet is arranged in the transparent sphere, a transparent outer shell is fixedly arranged on the outer surface of the lower end of the transparent sphere, a milky-white inner shell is arranged on the inner surface of the transparent outer shell, and a bottom shell is fixedly arranged on the outer surface of the lower end of the milky-white inner shell. And keys are arranged on the outer surface of the bottom shell. The novel intelligent dazzling light sound box provided by the utility model not only has the auditory effect of a stereo sound box, but also has the atmosphere dazzling light effect of a lamplight ornament, so that the omnibearing stereo feeling from auditory sense to visual sense is realized. By means of the magnetic attraction function, under rotation of the motor, the small magnets in the liquid are driven to rotate, the liquid is stirred, and dazzling colors of the liquid on the top are achieved under irradiation of the RGB lamp. Through the irradiation of the RGB lamps of the crystal ball sound equipment upper lamp panel and the crystal ball sound equipment lower lamp panel at the bottom, light rays irradiate on the milky white inner shell and then are transmitted to the transparent outer shell, so that the light rays are uniformly transmitted to the outer shell, and a bright light effect is realized.

The utility model relates to the field of electric heating tubes, in particular to a quick-heating electric heating tube, which comprises a shell and a heating tube arranged in an inner cavity of the shell, a guide pin is inserted in the heating tube, one end of the guide pin extends towards one end of the shell and is connected with a lead, one end of the shell is connected with a mounting flange, and a heating wire is sleeved outside the heating tube. The heating pipe is sleeved with a heat conduction pipe, the heat conduction pipe is internally provided with a heat conduction cavity, the heat conduction cavity is filled with heat conduction oil, one end of the heat conduction cavity is provided with an oil injection hole, and the shell is internally provided with an oil injection channel corresponding to the oil injection hole in a communicated mode. The heating wire is arranged between the heating pipe and the heat conduction pipe, so that the heating wire is in contact with the heat conduction pipe, the heat conduction efficiency is further enhanced, the heat conduction oil is filled in the heat conduction cavity of the heat conduction pipe, and the heat is uniformly conducted and distributed on the whole outer surface of the shell.

This invention relates to the field of lithium-ion battery manufacturing technology, specifically providing a full-tab battery cell for large cylindrical batteries, its preparation method, and applications. This invention innovatively employs a "winding-fixing-laser axial cutting-graded flattening" process flow, changing the traditional "cut-then-winding" process long used in the industry, achieving a breakthrough in the precision of tab forming. Specifically, after the bare cell is wound, the blank areas of each current collector layer have formed a stable stacked structure, which is precisely fixed using a special fixture and simultaneously cut along the axial direction by laser, completing the high-precision forming of multiple tabs in one step. This method fundamentally eliminates the problem of accumulated deviations caused by step-by-step operations in traditional winding processes, stably controlling the tab alignment accuracy within 0.1mm, effectively solving the long-standing problem of alignment consistency in existing technologies.

The utility model discloses a kind of heating disc and the liquid heater applied to it, it is related to heating disc technical field, comprising have: stainless steel contact layer, the stainless steel contact layer is used to directly contact with liquid, realize the heating conduction of liquid;Stainless steel base layer, the stainless steel base layer is used to bear thick film circuit or heating element, realize heat generation and conduction;Aluminum alloy soldering layer, the aluminum alloy soldering layer is between stainless steel contact layer and stainless steel base layer, for the welding of auxiliary stainless steel contact layer and stainless steel base layer;Stainless steel contact layer and stainless steel base layer of using S316 or S304 material, collocation porous aluminum alloy soldering layer, avoid heating disc surface rust, corrosion, prolong the service life of heating disc, while enhanced the overall structural stability of heating disc, and effectively improve heating efficiency, shorten the time of liquid heating.

The utility model discloses an A2L hot surface ignition temperature test special device, which comprises a test box and a spraying type pipe arranged in the test box, the surface of one end of the spraying type pipe is fixedly connected with a refrigerant tank with a valve, one side of the refrigerant tank is provided with the valve which is communicated with the interior of the refrigerant tank through the spraying type pipe, and the other side of the refrigerant tank is provided with the spraying type pipe. A glass barrel is arranged on the peripheral side, close to one end, of the spraying type pipe, a metal disc is fixedly installed on the surface of the lower end of the glass barrel, a thermocouple is fixedly installed on the surface of one side of the metal disc, a heat insulation pad is fixedly connected to the peripheral side surface of the metal disc, and one side, extending to the heat insulation pad, of one end of the metal disc is fixedly connected with a heating plate; according to the utility model, through the arrangement of the spraying type pipe, stable conveying and controlled release of the refrigerant can be realized, the refrigerant can be accurately sprayed on the metal disc, and the refrigerant is fully contacted with the hot surface, so that the ignition temperature of the hot surface is tested, and the effect of accurate test result is achieved.

The utility model provides an automatic heating pressing plate of a continuous hot press, and belongs to the technical field of continuous hot press equipment. The hot press comprises two hot press plates which are oppositely arranged, a heating plate is embedded in each hot press plate, each heating plate is composed of a plurality of heating units which are uniformly distributed, and each heating unit is provided with a heating rod, a thermocouple and a heat conduction block so as to guarantee that heat is efficiently and uniformly transmitted to a product to be processed. A liquid medium cavity is formed in the hot pressing plate and filled with a liquid medium, and the temperature of the hot pressing plate is kept stable. And a combined structure of oil absorption holes and oil absorption felts is also arranged to clean oil stains on the steel belt. According to the utility model, the problems of sealing material aging, thermal expansion deformation, local overheating and uneven heat dissipation of the pressing plate of the continuous hot press at high temperature are effectively solved, the maintenance cost is reduced, the stability of hot pressing work is ensured, and the production efficiency and the product quality are obviously improved.

The utility model discloses an electric connector convenient for heat dissipation, which relates to the field of electric connectors and comprises a female seat, a male seat and a shell, the male seat can be inserted into the female seat, and a plurality of air outlet holes for air to flow and a heat dissipation fan are arranged on the surface of the shell in a rectangular array mode. According to the utility model, the heat-conducting plates with holes are arranged on the surfaces of the male seat and the female seat, so that heat can be uniformly conducted conveniently, and meanwhile, the heat-dissipating fan is arranged above the heat-conducting plates to drive air to flow to assist heat dissipation; an air guide assembly is arranged, a gear meshed with the rack is driven to rotate back and forth through reciprocating motion of the rack, then air guide blades connected with the gear swing in a reciprocating mode, air blown out by a cooling fan is guided, the air is evenly blown to a whole heat conduction plate, heat is taken away through flowing of the air, and the temperature of the electric connector is reduced. Afterwards, the air is discharged from the air outlet holes arranged on the housing, thereby facilitating the guarantee of the appropriate temperature of the electric connector, and guaranteeing the good operation of the equipment.

The utility model relates to the technical field of lithium battery positive electrode materials, and discloses a pretreatment sagger and sintering equipment. The lithium layer is arranged at the bottom of the sagger body and is suitable for preventing lithium from being absorbed by the sagger body in the sintering process; the lithium layer is composed of one of lithium carbonate, lithium hydroxide or lithium oxide and is fixed to the bottom of the sagger body. The sintering equipment comprises a sintering furnace; the saggar bearing frame is arranged in the sintering furnace and used for fixing and arranging the multiple pretreatment saggars. The gas circulation system is used for introducing inert gas or reducing gas into the furnace in the sintering process so as to prevent lithium from being oxidized. The lithium layer can reduce direct contact between the sagger body and lithium, so that corrosion and abrasion of the sagger are reduced, and the service life of the sagger is prolonged.

The utility model discloses a heating module, the heating module is used for a carrier, the carrier is used for loading a plurality of single batteries, and the heating module comprises a heating layer, a first metal layer and a second metal layer. The heating layer is used for converting electric energy into heat energy and provided with a first wall face and a second wall face which are oppositely arranged in the thickness direction of the heating layer. The first metal layer abuts against the first wall surface; the second metal layer abuts against the second wall surface; wherein the heat of the heating layer is guided to the battery of each single body through the first metal layer, the first direction is set to be the direction from the first metal layer to the second metal layer, the thickness size of the first metal layer is set to be D1, the thickness size of the second metal layer is set to be D2 in the first direction, and the thickness D1 and the thickness D2 meet the condition that D1 is larger than D2. Heat radiation is isolated through the second metal layer, and energy loss is prevented; and the thickness of the first metal layer is greater than that of the second metal layer, so that heat guided by the first metal layer is uniformly conducted to each battery.

The invention belongs to the field of batteries, and particularly relates to a lithium supplement agent, a positive plate, a preparation method of the positive plate and a lithium ion battery. The lithium supplement agent comprises a positive electrode lithium supplement material and a hydrophobic protection layer coated on the surface of the positive electrode lithium supplement material; the hydrophobic protective layer is prepared from a hydrophobic organic matter RnPOXm or RnSO2Xm, and the hydrophobic organic matter RnPOXm or RnSO2Xm is a hydrophobic organic matter; wherein R is any group; x is one or more of halogen and alkoxy; n and m are natural numbers meeting the valence relationship. According to the lithium supplement agent, on the premise of improving the air stability of the positive electrode lithium supplement material, the energy density loss is reduced to the maximum extent, so that the positive electrode lithium supplement material plays a lithium supplement role at the maximum efficiency, and the energy density and the cycle life of the lithium ion battery are improved.

The utility model discloses an anti-collision paperboard structure and belongs to the technical field of paperboards. The supporting assembly comprises core paper, reinforcing ribs are bonded to the two sides of the core paper, two first clamping grooves are formed in the upper end and the lower end of the core paper, a row of first inserting grooves are formed in the two sides of the core paper, corrugated paper is bonded to the two sides of the core paper, and a fixing assembly is bonded to one side of the corrugated paper; the sides, close to the extending plates, of the two ends of the panel are provided with a row of second inserting grooves, the upper end and the lower end of the panel are each provided with two second clamping grooves, the upper end and the lower end of the panel adhere to a bottom plate, and clamping plates are arranged on the bottom faces of the bottom plates. Through cooperation of the supporting assembly, the fixing assembly and the inserting assembly, the supporting assembly, the corrugated paper and the fixing assembly are transversely connected into a whole, a multi-dimensional supporting network is formed, impact force can be evenly conducted and dispersed through the synergistic effect of the core paper, the reinforcing ribs, the corrugated paper, the fixing assembly and the inserting assembly, and the anti-collision performance of the paperboard in all directions is improved.

The application discloses a display device and a display equipment, and relates to the technical field of display. The display device comprises a middle frame, a display module and a cover plate. The middle frame comprises a bottom plate, part of the edges of the bottom plate is provided with a side plate, and the bottom plate and the side plate enclose a containing groove with an opening. The display module comprises a display panel, the display panel comprises a display area and a bonding area, the display area is arranged in the containing groove, and the bottom plate is located between the display area and the bonding area. The cover plate is arranged at the opening of the containing groove and is sealingly connected with the side plate away from the bottom plate. The display device can realize thinning.

The utility model proposes a kind of thermostat for chemical reagent experiment, including support load plate, the upper surface of support load plate is fixedly installed with temperature control seat, the inside of temperature control seat is equipped with support cover, the upper surface of support cover is opened with multiple placing holes, the inside of temperature control seat is opened with cavity, the inner bottom wall of cavity is fixedly installed with multiple temperature sensors, the bottom surface of temperature control seat is fixedly embedded with refrigeration guide plate, the bottom surface of refrigeration guide plate is fixedly installed with semiconductor refrigeration sheet, it is related to chemical reagent experiment field.The utility model is by the cavity of temperature control seat inside setting, can inject water liquid, utilize the good heat conductivity of water, can make the heat generated by annular electric heating wire evenly conduct to reagent, avoid local overheating, in addition by the cooperation of semiconductor refrigeration sheet and refrigeration guide plate, water liquid can be cooled directly, the problem that it is difficult to cool quickly after heating is solved, and then guarantee the experimental effect of chemical reagent.

The utility model belongs to the field of detection reagents, and particularly relates to a detection reagent cold storage device which comprises a box body, a positioning ring and a rubber ring, the inner wall of the box body is fixedly connected with a plug board, the inner wall of the box body is connected with a cover plate in a sliding mode, the plug board is provided with an adjusting assembly, the adjusting assembly comprises a supporting block, and the supporting block is fixedly connected with the positioning ring. The top of the inserting plate is fixedly connected with a supporting block, the inner wall of the supporting block is slidably connected with a guide rod, and the end face of the guide rod is fixedly connected with a limiting inclined block. The detection reagent cold storage device realizes compatible fixation of reagent tubes with different outer diameters through a replaceable positioning ring and rubber ring combined structure. By means of linkage design of a pushing ladder block and a limiting inclined block in the adjusting assembly, limiting of a positioning ring can be quickly relieved, and the positioning ring with rubber rings of different inner diameters can be replaced conveniently; the high-elasticity rubber ring is matched with the sliding bottom plate, so that the reagent tube is stably placed, shaking or toppling caused by tube diameter difference is avoided, and the universality of the device is remarkably improved.

The utility model discloses a kind of high-efficiency bar light source, it is related to the technical field of detecting light source.High-efficiency bar light source includes shell, light emitting component, cold air heat dissipation component and diffuser plate;Shell is provided with containing cavity, heat dissipation groove and opening;Light emitting piece is provided with multiple;Heat dissipation pad is abutted with the top end of circuit board and resistance;Heat dissipation pad is abutted with the side wall and top wall of containing cavity, and cover is set in the notch of heat dissipation groove;Multiple resistance is along first horizontal direction and second horizontal direction interval arrangement;Cold air heat dissipation component can input cold air from one vent to heat dissipation groove.The heat generated in the working process of light emitting component can be more evenly conducted to heat dissipation pad, cold air can absorb the heat of shell, the cold air in heat dissipation groove can contact with the top of heat dissipation pad, so that cold air can directly absorb the heat of heat dissipation pad, improve the heat dissipation effect of light emitting component, guarantee the working efficiency of this high-efficiency bar light source.

A grid type metal wire heater comprises a woven mesh and electrode assemblies located at the two opposite ends of the woven mesh. The woven mesh is composed of a plurality of transverse metal wires and a plurality of longitudinal metal wires which are orthogonally woven, the electrode assembly is connected with two opposite ends of the transverse metal wires or the longitudinal metal wires, and the surface of the woven mesh is provided with an insulating heat-conducting layer for protecting the woven mesh and conducting heat; compared with the prior art, the grid structure is formed by weaving the transverse metal wires and the longitudinal metal wires, and current can be uniformly conducted in the woven mesh under the communication action of the woven mesh and the electrode assembly, so that resistance loss is reduced, and electric energy can be converted into heat energy more efficiently; and meanwhile, the woven mesh is protected and supported under the action of the insulating heat-conducting layer, so that the woven mesh can be well adapted to surfaces with various complicated shapes.

The utility model relates to the technical field of automobile seat guard plate injection mold provides a cooling device of automobile seat guard plate injection mold, including base, the edge position department of base top all are fixed with support, the top of support is fixed with the top plate, the bottom of top plate is provided with the heat radiation structure, the heat radiation structure includes the electric push rod of installing in the top plate top two sides, the output of electric push rod of top plate bottom is installed with the template, the inside of support outside template is provided with the sliding slot, the outside of support both ends all is provided with the buffer pad, the inside of base is provided with the cooling structure. The utility model is provided with heat radiation structure, forms air cooling heat dissipation through the symmetrical distribution heat dissipation groove and heat dissipation fan, combines the equidistance first through -hole on the heat radiation plate, has increased the contact area of airflow and mould greatly, has accelerated the heat emission of the mould surface after injection molding.

The utility model relates to the technical field of cooling-water machines, and provides a special condenser for a water-cooled water chilling unit, which can reduce the volume of the cooling-water machine, and comprises a condensation pipe, an upper heat absorption plate, a lower heat absorption plate, two upper combination strips and two lower combination strips, the condensation pipe is an S-shaped pipe, the upper combination strips are provided with upper fixing grooves, and the lower combination strips are provided with lower fixing grooves. The upper combination strip is provided with a lower fixing groove, the lower combination strip is provided with a lower fixing groove, a combination piece is arranged between the two ends of the upper combination strip and the two ends of the lower combination strip, the upper heat absorption plate is provided with an upper arc-shaped groove, the lower heat absorption plate is provided with a lower arc-shaped groove, and a first heat dissipation gap is formed between the upper heat absorption plate and the lower heat absorption plate. The upper heat absorption plate and the lower heat absorption plate are detachably arranged on the upper combination strip and the lower combination strip respectively, second heat dissipation gaps are formed between the front side and the rear side of the upper heat absorption plate and the upper combination strip and between the front side and the rear side of the lower heat absorption plate and the lower combination strip, and heat dissipation fins are integrally arranged on the upper surface of the upper heat absorption plate and the lower surface of the lower heat absorption plate.

The invention discloses a high-elastic knitted fabric pleat removing device and method. The high-elastic knitted fabric pleat removing device comprises a mounting frame, a plurality of clamping assemblies for clamping fabric, a deformation assembly for driving the fabric to deform, a loosening assembly for loosening the fabric, an ironing assembly and a rolling assembly. The loosening assembly, the winding assembly and the ironing assembly are all mounted on the mounting frame; wet relaxation treatment and cooling treatment are carried out on the wave-shaped fabric, wrinkles generated due to the difference of elastic recovery rates between stretch yarns and other fibers are effectively relieved, stress can be evenly distributed when the fabric is stressed through wave-shaped deformation, local stress concentration is reduced, and therefore the possibility of wrinkle forming is reduced; meanwhile, the situation that the stretch yarn is adhered to other fibers at high temperature is effectively prevented.

The invention relates to the technical field of hygienic products, and particularly discloses a special sanitary towel for a puerpera based on a phase-change material and a preparation method of the special sanitary towel. The product comprises a surface layer, a flow guide layer, an absorption core body and a leakage-proof bottom layer which are sequentially overlapped, the surface layer contains a microencapsulation phase change material, the flow guide layer is of a double-layer structure of a sulfonylation carboxymethyl chitin fiber hydrophilic layer and a viscose fiber reverse osmosis resisting layer, and the absorption core body is formed by compounding a liquid rapid diffusion layer with gradient pores and a macromolecule water locking layer. The preparation method comprises the steps of microcapsule preparation, functional layer preparation, flow guide layer needling compounding and sectional type hot pressing assembly forming, and sectional type hot pressing is matched with polyolefin hot melt adhesive to adapt to the characteristics of all the layers. The product is suitable for the postpartum use of a puerpera, can realize rapid conduction diffusion and stable latching of liquid, and meanwhile, adjusts the sensible temperature; the preparation method is high in process adaptability, the firm structure of the product can be guaranteed, the structural and functional integrity of each functional layer is protected, and the overall stability of the product is excellent.

This application relates to the field of battery technology, and more particularly to a battery pack. The battery pack includes a housing, a cover, a heat spreader, a cooling component, and multiple battery cells. The housing has mounting slots; the cover is located at the opening of the mounting slot; each battery cell is spaced apart in the mounting slot, and each cell has a shoulder at the end furthest from the bottom of the slot; the heat spreader connects to each shoulder; the cooling component is located on the side of the heat spreader facing away from the shoulder, and a cooling channel is formed inside the cooling component, through which a cooling medium flows to achieve heat exchange with the heat spreader. This battery pack, by incorporating a combined heat dissipation structure of a heat spreader and a cooling component at the shoulder, firstly achieves targeted heat dissipation in this core heat-generating area, reducing heat accumulation at the shoulder from the source, avoiding the generation of thermal island effects, effectively improving the overall thermal management performance of the battery pack, slowing down cell aging, and extending the battery pack's service life.

The utility model relates to the technical field of alcohol recovery equipment, in particular to an alcohol recovery device which comprises a heating tank and a recovery tank arranged on the left side of the heating tank, a liquid inlet valve port and a controller are fixedly installed on the rear side of the heating tank respectively, a condenser is arranged on the top of the heating tank, a return pipe is arranged on the outer side of the condenser, and a liquid outlet valve port is arranged on the return pipe. A heating mechanism is arranged in the heating tank, a liquid outlet valve port and a nitrogen inlet are fixedly formed in the left end of the recycling tank, a pressure sensor is arranged on the rear side of the recycling tank, a lining layer is arranged in the recycling tank, and a PTFE composite layer, an aluminum foil layer and a polyvinyl alcohol composite layer are arranged in the lining layer. According to the alcohol recovery device, the structural design in the heating mechanism is utilized, and under the combination of the electric heating pipe and the heat conduction layer, generated heat can be uniformly conducted to the inner side of the heating tank, so that the heating time is effectively shortened, and the energy consumption of the device is prevented from being increased.

This invention provides a GGNMOS structure for electrostatic discharge (ESD) protection, comprising: a substrate, two sets of current discharge modules, and a ring-shaped heavily doped region. Each set of current discharge modules includes multiple discharge units; wherein each discharge unit includes: two source terminals, one drain terminal, two gate terminals, one floating heavily doped region, multiple lightly doped drain regions, and an isolation layer. In each discharge unit, this application forms a DN+ / Psub / P+ (Diode) by embedding a floating heavily doped region in the drain terminal. By adjusting the distance between the floating heavily doped region and the sub-drain terminal, the breakdown voltage of the Diode is made greater than VDD and less than the trigger voltage of the parasitic NPN. This allows the Diode to trigger before the parasitic NPN triggers, injecting a large number of electron-hole pairs into the substrate, increasing the substrate current, reducing the trigger voltage, and ensuring uniform device conduction, thereby improving the ESD protection performance of the GGNMOS.

The utility model relates to the technical field of fluid pipeline protection structures, in particular to a low-temperature fluid pipeline protection device which comprises a pipeline body and is characterized by further comprising an outer shell, a bottom groove A, a heat conduction lining piece, a bottom groove B, a matching strip, a heat preservation cavity, a connecting groove, a bent heating wire, a linear heating wire and a clamping edge bar. Clamping side bars are arranged on the edges of the outer shells correspondingly, the edges of the outer shells of the two half pipes are connected together in a matched mode through the clamping side bars, and a joint of the two outer shells is located on the horizontal line corresponding to the middle positions of the two sides of the pipeline body; and the heat conduction lining pieces are connected to the inner surface of the outer shell in a matched mode. The pipeline protection device has the advantages that the installation mode is convenient, the heating effect is stable, the pipeline protection effect in cold weather is effectively improved, and damage to the pipeline under low-temperature clamping in winter is reduced or avoided.

The invention relates to an air-cooled cold and hot vehicle-mounted cup holder. The technical problems of uneven heat exchange, large temperature difference and the like in the prior art are solved. Comprising a cup body assembly, the inner side of the cup body assembly is provided with a cup stand used for containing articles, the upper end of the cup stand is provided with a sealing structure capable of forming a sealed space on the inner side of the cup stand when the articles are placed, the cup body assembly is internally provided with a heat exchange cavity located on the outer side of the cup stand in the circumferential direction, and the lower end of the cup body assembly is provided with a thermoelectric module assembly located below the cup stand. The thermoelectric module assembly is provided with cold end fins extending into the heat exchange cavity, and the heat exchange cavity communicates with the sealed space through the inner circulation mechanism and conducts heat convection. The vehicle-mounted cup holder has the advantages that airflow is driven by the internal circulation mechanism to circularly flow between the heat exchange cavity and the cup holder sealed space, and the precise layout of the heat exchange hole group is matched, so that the temperature in the sealed space is quickly and uniformly conducted, refrigeration or heating of articles such as drinks can be quickly completed, and the problems that a traditional vehicle-mounted cup holder is slow in heat exchange and non-uniform in temperature are solved.

To make conduction time (lighting time) of a light emitting element more uniform. A lighting control method in which a controller is used to drive a plurality of light source units connected in parallel to each other in a time-division manner, (a) where the controller includes: (b) to perform control of one switch element among a plurality of switch elements connected in series to each of the plurality of light source units to switch to a close state; (c) to start measuring a specified time when a current flowing through a current path between a power supply circuit and the plurality of light source units is equal to or greater than a threshold value; and (d) to perform control of the one switch element to switch to an open state when the specified time has elapsed.