Extrusion aluminum heating sink is used to dissipate heat generated by electronic components such as transistors, diodes, and integrated circuits. The heat sink is attached to the component using thermal adhesive or thermal grease, which helps transfer heat from the component to the heat sink. The extrusion aluminum heat sink has a large surface area, which increases the rate of heat dissipation. The fins on the heat sink increase the surface area even further, allowing for more efficient cooling. The extrusion aluminum heat sink is commonly used in electronic devices such as computers, LED lights, and power supplies.

A heat sink is a device that is used to dissipate heat from electronic components by increasing the surface area of the component and allowing the heat to be transferred to the surrounding air. The specification of a heat sink includes the following parameters: 1. Thermal Resistance: This is the measure of how effectively the heat sink can transfer heat away from the component. It is measured in degrees Celsius per watt (°C/W). A lower thermal resistance indicates a more efficient heat sink. 2. Thermal Conductivity: This is the measure of how well the heat sink material conducts heat. It is measured in watts per meter-kelvin (W/mK). Materials with higher thermal conductivity are more effective at transferring heat. 3. Fin Density: This is the number of fins on the heat sink per unit of length. A higher fin density increases the surface area of the heat sink and improves its ability to dissipate heat. 4. Fin Thickness: This is the thickness of the fins on the heat sink. Thicker fins can absorb more heat but may also impede airflow. 5. Base Thickness: This is the thickness of the base of the heat sink that makes contact with the component. A thicker base can absorb more heat but may also increase thermal resistance. 6. Material: Heat sinks can be made from a variety of materials including aluminum, copper, and graphite. The choice of material depends on the specific application and the desired thermal properties. 7. Size and Shape: The siz

LED nail machine lamp drivers are electronic devices that provide power to LED lamps used in nail salons. These drivers are designed to meet specific technical requirements to ensure the proper operation of LED nail lamps. The following are the specifications of LED nail machine lamp drivers: 1. Input voltage: The input voltage of LED nail machine lamp drivers is typically 100-240V AC. This allows the device to be used in different countries with varying power supply voltages. 2. Output voltage: The output voltage of LED nail machine lamp drivers is usually 12V DC. This voltage is required to power the LED lamp used in nail salons. 3. Output current: The output current of LED nail machine lamp drivers is typically between 1A and 5A. This current is required to power the LED lamp and ensure that it operates at the correct brightness level. 4. Power consumption: The power consumption of LED nail machine lamp drivers is usually between 10W and 60W. This power consumption is required to provide enough power to the LED lamp and ensure that it operates at the correct brightness level. 5. Protection features: LED nail machine lamp drivers typically include protection features such as short-circuit protection, over-current protection, and over-voltage protection. These features ensure that the device and the LED lamp are protected from damage in case of any electrical faults.

Alvanized Metal Roofing Tile is a type of roofing material that is made from steel sheets that have been coated with a layer of zinc. This coating provides several benefits, including: 1. Corrosion resistance: The zinc coating helps to protect the steel from rust and corrosion, which can prolong the life of the roofing material. 2. Durability: Alvanized Metal Roofing Tile is a strong and durable material that can withstand harsh weather conditions, such as heavy rain, wind, and hail. 3. Energy efficiency: The reflective surface of the zinc coating can help to reduce heat absorption, which can lower cooling costs during the summer months. 4. Low maintenance: Alvanized Metal Roofing Tile requires minimal maintenance and is easy to clean. 5. Versatility: Alvanized Metal Roofing Tile comes in a variety of colors and styles, making it a versatile option for different types of buildings and architectural styles. Overall, Alvanized Metal Roofing Tile is a popular choice for residential and commercial roofing applications due to its durability, energy efficiency, and low maintenance requirements.

The enclosure should be designed to provide adequate ventilation and prevent overheating. It should also be able to protect the audio equipment from dust, moisture, and other environmental elements. The enclosure should also be designed to provide a secure and soundproof environment for the audio equipment. The enclosure should also be designed to be easy to install and use. It should have a secure mounting system that is designed to prevent the enclosure from vibrating or shifting when the audio equipment is in use. Additionally, the enclosure should be designed to have removable panels or doors to provide access to the audio equipment. The enclosure should also be designed with a durable finish that is resistant to scratches, dents, and other damage. The finish should also be designed to be easy to clean and maintain. Finally, the enclosure should be designed to meet the size and weight requirements of the audio equipment. The size and weight of the enclosure should be compatible with the size and weight of the audio equipment. Additionally, the enclosure should be designed to accommodate any additional components or accessories that may be needed.

Power shell metal is a metal material used for power equipment, which has good heat resistance, impact resistance and corrosion resistance. Its advantages lie in its high durability, which can withstand the long-term humid and hot environment, impact and aging, and can provide reliable protection effect. In addition, it also has less maintenance requirements, is easy to construct and install, and can use metal to make unique shapes, reduce carbon emissions and reduce costs. For the maintenance and service of the plug-in radiator, the following things can be done: check whether the radiator is damaged, ensure that the radiator is firmly installed, clean the dust, use compressed air to purge the radiator surface when conditions permit, and check whether the fan operates normally.

1. Analyze the high-power LED market from the main application market of high-power LED - landscape lighting. As the largest application market of LED lighting, the landscape lighting market accounts for about 43%. Its new round of rapid growth will certainly drive the rapid development of the overall LED lighting industry. Some large and medium-sized cities, such as Shanghai, Xiamen, Beijing, Dalian and Nanchang, have completed a considerable number of LED lighting demonstration projects. 2. The successful completion of these demonstration projects in large and medium-sized cities and the successful application in the Olympic venues indicate that the technology of LED lighting in landscape lighting has gradually matured. Whether at home or abroad, the landscape of a city is a landmark building product of a city, and neon lights as landscape lighting are gradually replaced by LED landscape lights around the world due to energy, energy conservation, environmental protection and other issues. There are about 700000 cities around the world, and the huge economic benefits generated by these lights are unpredictable based on the calculation of 5000 lights in a city and about 1000 yuan for a lamp. 3. Driver is the core component of LED lighting. With the maturity of LED chip technology, the quality of LED light source has been very reliable. In many cases, the fault of LED lamps is from the driver. High-power LED drive power supply is an emerging industry, and has not formed a centralized industrial cluster. Therefore, the regional nature is not obvious. And the number of enterprises entering the industry is not large, so the degree of competition is low. 4. The efficiency of led driver is very high, which can fully he

Geometric accuracy includes shape accuracy, geometric accuracy of mutual position and geometric accuracy of relative motion. The surface shape of the workpiece processed on the lathe depends on the relative motion path between the tool and the workpiece, and the tool and the workpiece are directly driven by the executive part of the CNC lathe. Therefore, the geometric accuracy of the CNC lathe is the basic condition to ensure the machining accuracy. Each type of digital control lathe has its own geometric accuracy requirements. Geometric accuracy generally includes: axial rotation of the main shaft, radial circular run-out of the main shaft, mutual perpendicularity of the movement of each coordinate direction, the equal height of the main shaft taper hole axis and the tailstock taper hole, etc

LED lights need to be protected by the driver. The main reasons are as follows: 1. Because LED is a characteristic sensitive semiconductor device and has negative temperature characteristics, LED driver power supply (also called driver) is to protect its stable working state during the application process. 2. LED devices have almost strict requirements for driving power supply. Unlike ordinary incandescent bulbs, LEDs can be directly connected to 220V AC mains power. LED is driven by low voltage. It is necessary to design complex conversion circuit. Different LED lamps for different purposes should be equipped with different power adapters. 3. To design a good power supply, we must comprehensively consider the factors of efficiency conversion, effective power, constant current accuracy, power supply life, and electromagnetic compatibility, because the role of power supply in the whole lamp is as important as that of human heart.

1. First of all, please open the package of the aluminum radiator, and install the vent valve and union first. 2. The location of the hole for installing the special hook can be drawn on the wall according to the provided installation drawing or relevant requirements. 3. When installing the aluminum profile radiator, consider the damage caused by the expansion and contraction of the heating pipe to the radiator. 4. Put 12 expansion pipes in and flat. 5. Use the impact drill to drill 12 holes, and the depth should be such that the outer side of the expansion pipe is flush with the wall after it is put in. 6. Install the bottom hook and tighten the screws after meeting the requirements. 7. Place the aluminum profile radiator on the installed hook at the bottom, install the upper hook to adjust the position of the hook, and then tighten the expansion screw after clamping. When placing the radiator, place the vent valve above. 8. After installing and assembling the pipe joint, install the pipe according to the requirements of the drawing and connect it with the inlet and outlet. Fasten all parts. The rear side is 3.5cm away from the wall and 5cm away from the skirting line. 9. Please input hot water, open the vent valve, and vent until water comes out. The operating pressure of aluminum profile radiator shall not exceed 0.12Mpa.

The positioning accuracy index controls the accuracy of the actual position to be achieved when the moving parts of the lathe move from one position to the expected position. The error between the actual position and the expected position is called the positioning error. The positioning error of the tool holder and other parts with periodic indexing motion is reflected as relative displacement error, and its positioning accuracy is called indexing accuracy. If the moving parts of the CNC lathe are repeatedly positioned from one position to another, the maximum error between the actual positions reached by each positioning is called the repeated positioning accuracy of the moving parts. The geometric accuracy, transmission accuracy and positioning accuracy of the lathe are generally measured without cutting load, and the CNC lathe does not move or the movement speed is low, so it is generally called the static accuracy of the CNC lathe. The static accuracy depends on the manufacturing accuracy and assembly accuracy of the main parts and components on the CNC lathe, such as the spindle and its bearing, screw nut, gear, bed, box, etc. The positioning accuracy generally includes: linear motion positioning accuracy; Repetitive positioning accuracy of linear motion; Return accuracy of linear motion mechanical origin; Positioning accuracy of rotary motion; Repetitive positioning accuracy of rotary motion; Return accuracy of rotary zero point.

The geometric accuracy includes the geometric accuracy of shape, mutual position and relative motion. The surface shape of the workpiece machined on the lathe depends on the relative motion path between the tool and the workpiece, and the tool and workpiece are directly driven by the actuator of the CNC lathe. Therefore, the geometric accuracy of the CNC lathe is the basic condition to ensure the machining accuracy. Each type of digital lathe has its own geometric accuracy requirements. Geometric accuracy generally includes: axial rotation of the main shaft, radial circle runout of the main shaft, mutual perpendicularity of the movement in all coordinate directions, equal height of the axis of the main shaft taper hole and the tailstock taper hole, etc.

Aluminum radiator mainly includes high-pressure cast aluminum and tensile aluminum alloy welding. Its advantages mainly include: ① The aluminum radiator has good heat dissipation and obvious energy-saving characteristics. In the same room, if the radiator of the same specification is used, the number of aluminum castings is less than that of steel. ② Aluminum radiator has good oxidation and corrosion resistance, without adding any additives. The principle is that once aluminum encounters oxygen in the air, it will generate an oxide film, which is tough and dense, preventing further corrosion of the body material. Aluminum radiator shall be selected, and it is better to select high-pressure cast aluminum module combined radiator. The radiator is formed by one integral die casting, so there is no water leakage problem of the weld. Moreover, its biggest advantage is that the product is not limited by the district heating system. Even in the open boiler system, it can also be free from oxygen corrosion. Because of the modular design, after a heating season, if the indoor temperature is not enough, you can also install one or two more pieces in the next year to meet your needs, instead of replacing the whole set of heaters like steel radiators. In addition, because the requirements for water quality of aluminum radiator are different from that of steel, it should be avoided to install aluminum radiator mixed with other materials.

1. Main current loop PCB as short as possible. LAYPCB experience, and layout, this is nothing, the quick way is to see more works of manufacturers. 2. Optimize the transformer parameter design to reduce eddy current losses caused by ringing. This is more difficult, we must first grasp the basic electromagnetic theory, design a reasonable transformer, the most important thing is patience, even if it is to think of can improve the efficiency of 0.5%, but also to try. 3. Reasonable selection of switching devices. This is the cost and performance of the balance, what kind of customer requirements, what kind of device, but it is reasonable. If you want efficiency, no doubt COOL MOS, low VF output diode 4. Enter the EMI part of the optimal design If the security rules, this part more elegant, mainly the experience. 5. Choose efficient topology This is the beginning of the program selection, such as PWM and QR PFM, the current mention of the efficiency requirements of customers, it is necessary to assess what kind of selection 6. Choose a good electrolytic capacitor Many people ignore this, a great loss of electrolysis, Chen Yong teacher there is a detailed explanation of the article 7. Start part of the power design

First, look at the requirements for heat dissipation. For example, if the requirements for heat dissipation are high and the heat generation is large, and it is necessary to achieve rapid cooling and quickly transfer the heat, it is necessary to select materials with high thermal conductivity. The thermal conductivity of materials has a great impact on the heat dissipation effect. The difference between materials with high thermal conductivity and materials with low thermal conductivity can be dozens of times. What is the thermal conductivity of commonly used thermal conductive materials? According to Yongyu aluminum radiator experts, silver has the highest thermal conductivity among common metals, followed by copper. Here are the thermal conductivity of different materials: Thermal conductivity coefficient (unit: W / mK) Silver 429 Copper 401 Jin 317 Aluminium 237 Iron 80 Lead 34.8 1070 aluminum alloy 226 1050 aluminum alloy 209 6063 aluminum alloy 201 6061 aluminum alloy 155 In add

DC/DC is a DC conversion power module, and DC/AC DC/AC conversion power module. It can be divided into two types: pressure drop and pressure rise. The power module is a power supply device that can be directly mounted on the printed circuit board. There are two types of power supply: step-down and step-up. It is characterized by providing power for special integrated circuit (ASIC), digital signal processor (DSP), microprocessor, memory, field programmable gate array (FPGA) and other digital or analog loads. DC/DC and DC/AC power conversion modules, in addition to being widely used in the above digital and control circuits, can also be widely used in new energy power generation, such as photovoltaic solar power generation, wind power generation, tidal power generation and so on. If it is applied to street lamps, lighting, etc., DC/DC DC conversion power module is used to adjust the output voltage and current of the solar battery pack to the voltage (current) required for the light source (bulb). When photovoltaic solar cell pack (DC) is applied to civil and household use, most electrical appliances use AC 220V power supply, such as air conditioners, refrigerators, electromagnetic cookers, etc., so it is necessary to convert the DC power output from the solar cell pack into 220V AC power. At this time, the DC/AC converter power module plays a major role. Photovoltaic solar power generation controller uses a large number of DC/AC conversion power modules to convert DC power into 220V AC power.

1. Long service life: most metal roofs use high-quality steel plates or aluminum plates as the base plate, and the surface is coated with aluminum zinc coating, molecular resin, natural stone particles, etc. as the protective layer, so that they have super temperature resistance, low temperature resistance, light resistance, corrosion resistance, aging resistance and other properties and an extra long service life, which is firm and safe, and the service life can reach 70 years at most. 2. Energy saving: Many people think that metal will absorb the heat of solar radiation, which is a mistake. In fact, metal roofs can reflect solar heat. In addition, some metal roofs are coated with special reflective pigments to minimize heat absorption, balance indoor temperature and comfort without opening the air conditioner. 3. Light weight: The metal roof material is light, so as to save the cost of building the support structure. 4. Environmental protection: metal materials can be recycled at the end of the roof life, and some can even be 100% recycled, which is conducive to environmental protection. 5. Fire resistance: since metal roofing materials are incombustible, they usually have a fire rating of a. 6. Fast installation: most metal roofs are fast in installation, with high degree of freedom in

The access control system can be divided into the following three categories according to the access identification method: 1. Password identification: identify the access authority by checking whether the password is correct. This kind of products can be divided into two categories: one is the disordered keyboard type (the numbers on the keyboard are not fixed and change automatically from time to time) 2. Card identification: identify the access authority by card reading or card reading plus password, which can be divided into magnetic card and RF card according to card type 3. Portrait recognition: identify the entrance and exit by means of biometrics of inspectors. There are fingerprint type, iris type and face recognition type.

1. Insert the vehicle inverter into the cigarette lighter socket, and check the tightness between the plug and the socket. If it is too loose, open the shrapnel on both sides of the plug head and insert it into the cigarette lighter socket. 2. Please confirm whether the power indicator of the on-board inverter is on 3. Insert the power plug of the electrical appliance to be used into the socket of the on-board power converter 4. Fuse replacement: unscrew the plug part of the plug counterclockwise and replace it with a new fuse Special tips: When unplugging the electrical plug in continuous use, make sure that the switch of the electrical appliance is turned to "OFF", and then unplug the power plug. And unplug the on-board inverter. When replacing the fuse of the on-board inverter, be sure to use the fuse of the same model and specification. Using a fuse or wire other than the specified specification will cause abnormal overheating and fire. Please clean the dirt at the plug of the vehicle inverter in time to avoid poor contact or abnormal overheating of the converter After use or when the vehicle inverter is not used, please unplug the product from the cigarette lighter socket and keep it properly. Please use it strictly. Top my conversation for quick saving and searching

When we use the DC power converter, we can turn on the switch, press the power converter to the ON position, and then look at the instrument panel voltage on the right side of the power converter, which should be between 11V and 14V. We then press the switch of the power converter to the OFF position. At this time, the indicator light is really over, and the alarm will immediately give an alarm, which is a normal reflection. When we insert the load into the AC output port of the power converter, the switch of the load will turn off. Press the switch of the power converter to the ON position, the load will be turned on, and the power converter will provide current to the load. When the switch of the power converter is turned on, but no current pin is provided to the load, the current of the power converter will be consumed, and the current will be less than 0.8A, which is actually no-load consumption. When you want to turn it on high and do not want to use the power converter, remember to turn off the switch of the power converter. All types of power converters have matching power. For example, the 2000W power converter is applicable to 220V, 1800W or less electrical appliances. Power or wattage means the rated power of the product. When the product is started, its power consumption is generally greater than the normal working time. When the display, motor, etc. are turned on, the power basically reaches the peak. Obviously, the 2000W power converter can withstand 4000W more power consumption, and the peak power of electrical appliances below 2000W may exceed the standard, leading to overload protection, so the current will be turned off. At the same time, it will drive multiple appliances, which may happen. If you want

Power converter, also known as AC converter, is a kind of transformer. There are two common types: 220V voltage and 110V voltage. Power converter is a scientific name, that is, patch panel, also known as plug. The power converter is a movable multi position socket with power cord and plug, which can be used to connect more than one power plug. Multiple sockets are put together, and multiple devices can get power, saving space and lines.

1. Rain and leak proof Houses in our country generally have sloping roofs, and then we need to build tiles on the roofs. The raw materials of tiles are diverse, some are made of cement, and some are made of clay. Tiles are important roof waterproof materials. When it rains, rainwater will flow down along the tiles. Due to the waterproof performance of tiles, rainwater will not seep. 2. Thermal insulation At the same time, it also blocks most of the sunshine, which plays an important role in protecting the house and makes the living conditions of the house better, giving you a warm winter and cool summer living experience. 3. It has a good decorative effect and is beautiful With the passage of time, the roof tile products have played a decorative role. The roofs in Beijing are generally red or gray, which can be used to decorate the houses and make them look more beautiful. If the self built house uses roof tiles, it will make people see, and it is as high-end as the villa residence. 4. Environmental protection Roof tile manufacturers also pay attention to this in the production process. The construction is relatively simple, which can effectively reduce raw materials, which has been recognized by many envi

Common types of roof tiles are: 1. Asphalt shingle This kind of asphalt tile is common and can be seen on many roofs. The biggest feature is that it can withstand the wind and the sun. No matter how harsh the environment is, it can withstand the wind and rain, and its service life can reach more than 20 years. It also has a lot of colors and a large selection space. 2. Metal tile The resistance to pressure of metal tile is relatively strong, its decontamination and self-cleaning are superior, and there are many color choices. After installation, it is not easy to fall off, and the service life can reach more than 50 years. However, relatively speaking, the price is higher than other tiles, and the affordability is greater. Generally speaking, it can be seen in some high-end residences, villas and resorts. 3. Cement tile Cement tiles are the most common and common. Cement tiles also have many shapes, such as s-shaped tiles and corrugated tiles. The production process is relatively simple, and they can be produced in large quantities and have many varieties. However, there is a disadvantage that it is easy to be damaged. It is more suitable for rural residential buildings and can also be seen in some ancien

1. Convenience: Compared with ordinary mechanical locks, the intelligent door lock has an automatic electronic induction lock system, which automatically senses that when the door is in the closed state, the system will automatically lock. Some intelligent door locks can also open a unique voice prompt function, making it easier for users to operate. 2. Security The general password lock has the danger of password leakage, while the intelligent lock has the virtual password function technology, that is, in front of or behind the registered password, you can enter any number as the virtual password, which can effectively prevent the leakage of the registered password, and at the same time, you can open the door lock. Moreover, many smart locks now have patented technical support. Safety handle buttons are added to the indoor handle settings. You need to press and hold the safety handle button to turn the handle to open the door, bringing a safer use environment 3. Security The current smart lock is different from the previous "first open and then scan" method. The scanning method is very simple. Place your finger above the scanning area and scan from top to bottom. There is no need to press your finger on the scanning area. The scanning method redu