How to do a good job of LED display heat dissipation structure?
LED display is an electronic product, in the process of using heat is a normal phenomenon.
Small area of the LED display, such as signage, door screen, small publicity window screen, etc., the area is limited power is limited, heat is also limited, generally we do not need to consider the heat problem. But a large area of indoor LED display and outdoor screen, due to the heat accumulated huge, we often have to consider the heat problem.
So what are the situations that we have to consider? The author will do a little bit of combing from the following aspects.
First, the power and area
Power is a primary consideration, the general industry standard practice is, indoor LED display playback power below 5KW do not need to consider the cooling problem, corresponding to the conversion to the area is generally within 10 square meters. Outdoor LED display is more strict, first of all, outdoor LED display power and heat than the same area of indoor LED display is much larger, generally also 5KW or less can not consider the heat problem, corresponding to the conversion to the area is generally 5 square meters of outdoor LED display can not consider the heat problem.
Second, direct sunlight
Indoor LED display generally does not involve direct sunlight. Outdoor LED screen is used to play advertising, government propaganda, public service announcements, etc., long time in direct sunlight, the temperature will rise to very high, especially in the summer outdoor LED screen, the surface temperature is very easy to warm up to more than 100 ° C, and the internal structure of the screen body, if you don't do cooling treatment, air circulation, the temperature will rise even higher. Therefore, as long as there is direct sunlight, we will generally do the heat dissipation structure.
Third, the screen body (after) the size of the internal space
In general, the front of the LED display (front) is the playing surface, there is open space for heat dissipation, while the internal (back) situation is very different. If the inside (back) of the LED display is a conventional narrow limited space, we decide to do or not to do the heat dissipation structure according to the first two factors. But there are also some rear space, ventilation conditions are good we do not need to do cooling structure.
So what should we do when we synthesize the above three factors and evaluate the result that we need to add a heat sink? The following three points make us often use the approach.
First, increase the fan
Fans are most commonly used in outdoor LED screen waterproof box, the box is generally thick in 10 centimeters or so, that is, the screen inside (behind) space is very small, we generally use fans to build a circulating ventilation system, common practice is to add two fans in the waterproof box back door in the upper part of the two fans, a fan blowing inward, a fan blowing outward, and the box inside the hot air is mainly in the upper part of the box, this way it forms a This way, it forms a circulating ventilation system in which the cool air from outside comes in and the hot air from inside blows out.
Similar ideas we also use in the simple box outdoor screen project. We stay in the entire lower part of the big screen ventilation grille, in the top of the big screen with four 500W power fan blowing hot air out, thus forming an external cool air from the bottom to the inside, the hot air automatically upward, the top hot air blowing out of such a cycle of cooling channels.
Second, increase air conditioning.
In the outdoor screen project, we often use air conditioning to cool down the LED display. In more than 20 square meters of outdoor LED large display project, we will calculate the number of air conditioning according to the size of the area. The inner unit of the air conditioner outputs cold air to cool the screen, and the outer unit of the air conditioner is installed to the side or rear of the screen.
Generally we use air conditioning at the same time, but also use the fan at the same time, at the bottom and top (or side up and down) to increase the fan to build a circular ventilation channel.
Third, expand the space behind the screen
Expand the space behind the screen, this method applies to indoor LED display, welding LED display steel structure, you can communicate with the customer, the screen behind the space to do, such as leaving 60 centimeters or 80 centimeters above the width of the maintenance channel. In this case, the space behind the screen is large enough, and then in the case of increasing the fan, it can be very easy to the heat generated by the screen to radiate out.
Small area of the LED display, such as signage, door screen, small publicity window screen, etc., the area is limited power is limited, heat is also limited, generally we do not need to consider the heat problem. But a large area of indoor LED display and outdoor screen, due to the heat accumulated huge, we often have to consider the heat problem.
So what are the situations that we have to consider? The author will do a little bit of combing from the following aspects.
First, the power and area
Power is a primary consideration, the general industry standard practice is, indoor LED display playback power below 5KW do not need to consider the cooling problem, corresponding to the conversion to the area is generally within 10 square meters. Outdoor LED display is more strict, first of all, outdoor LED display power and heat than the same area of indoor LED display is much larger, generally also 5KW or less can not consider the heat problem, corresponding to the conversion to the area is generally 5 square meters of outdoor LED display can not consider the heat problem.
Second, direct sunlight
Indoor LED display generally does not involve direct sunlight. Outdoor LED screen is used to play advertising, government propaganda, public service announcements, etc., long time in direct sunlight, the temperature will rise to very high, especially in the summer outdoor LED screen, the surface temperature is very easy to warm up to more than 100 ° C, and the internal structure of the screen body, if you don't do cooling treatment, air circulation, the temperature will rise even higher. Therefore, as long as there is direct sunlight, we will generally do the heat dissipation structure.
Third, the screen body (after) the size of the internal space
In general, the front of the LED display (front) is the playing surface, there is open space for heat dissipation, while the internal (back) situation is very different. If the inside (back) of the LED display is a conventional narrow limited space, we decide to do or not to do the heat dissipation structure according to the first two factors. But there are also some rear space, ventilation conditions are good we do not need to do cooling structure.
So what should we do when we synthesize the above three factors and evaluate the result that we need to add a heat sink? The following three points make us often use the approach.
First, increase the fan
Fans are most commonly used in outdoor LED screen waterproof box, the box is generally thick in 10 centimeters or so, that is, the screen inside (behind) space is very small, we generally use fans to build a circulating ventilation system, common practice is to add two fans in the waterproof box back door in the upper part of the two fans, a fan blowing inward, a fan blowing outward, and the box inside the hot air is mainly in the upper part of the box, this way it forms a This way, it forms a circulating ventilation system in which the cool air from outside comes in and the hot air from inside blows out.
Similar ideas we also use in the simple box outdoor screen project. We stay in the entire lower part of the big screen ventilation grille, in the top of the big screen with four 500W power fan blowing hot air out, thus forming an external cool air from the bottom to the inside, the hot air automatically upward, the top hot air blowing out of such a cycle of cooling channels.
Second, increase air conditioning.
In the outdoor screen project, we often use air conditioning to cool down the LED display. In more than 20 square meters of outdoor LED large display project, we will calculate the number of air conditioning according to the size of the area. The inner unit of the air conditioner outputs cold air to cool the screen, and the outer unit of the air conditioner is installed to the side or rear of the screen.
Generally we use air conditioning at the same time, but also use the fan at the same time, at the bottom and top (or side up and down) to increase the fan to build a circular ventilation channel.
Third, expand the space behind the screen
Expand the space behind the screen, this method applies to indoor LED display, welding LED display steel structure, you can communicate with the customer, the screen behind the space to do, such as leaving 60 centimeters or 80 centimeters above the width of the maintenance channel. In this case, the space behind the screen is large enough, and then in the case of increasing the fan, it can be very easy to the heat generated by the screen to radiate out.