Why do LED plant lights need heat dissipation
All electronic products need heat dissipation. LED plant lights are no exception. If they work for a long time, they will generate a lot of heat. If the heat dissipation problem is not solved, it will first affect the LED plant light lamp bead decay and other issues, secondly it may cause a short circuit, and finally it will always affect the LED. The service life of plant lights.
In fact, there are two kinds of plant lights: high-power plant lights and low-power plant lights. LED plant lights, like all electrical products, will generate heat during use, leading to an increase in ambient temperature and temperature. At present, low-power LED plant lights can be used without special heat dissipation measures, only a basic heat dissipation structure is required, because the LED plant lights have high electro-optical conversion efficiency and relatively no heat generation.
LED high-power plant lights are not the case. If the heat dissipation problem is ignored, it will not only affect the service life of the LED plant lamp, but also burn the lamp tube, and also affect the normal growth of the irradiated plant.
In the manufacturing process of LED plant growth lamps, heat dissipation is an important link. At present, the main heat dissipation measures adopted by LED plant growth lamps are as follows:
1) Fan cooling:
The principle of using a fan to transfer the heat generated by the LED plant light to the air is very simple. Similar to the heat dissipation principle of the computer and TV in daily use, the fan is used to convection the air to ensure that the temperature of the air around the heating element is not too high. It is simply generated by the fan, LED plant growth lamp and transmitted to the hot air in the air, and then Supplement normal temperature air to achieve the effect of heat dissipation.
2) Natural heat dissipation:
Natural heat dissipation means that no external measures are required, and it works directly inside the LED plant light. The main principle is to make the LED plant growth lamp have a larger contact area with the air, and use components with better thermal conductivity, so as to better produce lamps. The heat is transferred to the air, and then through natural convection, that is, the hot air rises and the cold air fills the position, so as to achieve the purpose of cooling the LED plant light.
At present, heat dissipation fins, lamp housings, system circuit boards, etc. are mainly used, which is also a relatively low cost and good heat dissipation method, which is widely used in various electrical equipment.
3) Electromagnetic heat dissipation:
Electromagnetic heat dissipation is called electromagnetic jet heat dissipation. Instead of using a fan to convection the air, it uses electromagnetic vibration to drive the cavity in the film to vibrate, so that the air continues to circulate to achieve the effect of heat dissipation. The technical difficulty is complicated. Some LED products are already on the market.
The benefits of LED plant light heat dissipation are:
1. Relatively prolong the service life of LED plant lights, the service life of LED plant lights is about 50,000 hours. If the heat dissipation is not good, the internal structure will age faster, and the service life of the lamp will definitely shrink sharply.
2. Light effect, any artificial light source has light decay. A very important factor that affects the speed of light decay is temperature. High temperature will accelerate the aging of materials. The same use LED plant lights, the same use for 50,000 hours, one at temperature In the high temperature environment for safe light, the irradiated crop is undoubtedly the latter, and its total yield and quality are higher than the former.
3. The effective heat dissipation configuration of the LED plant light also helps to control the ambient temperature. If the plant lamp is not heated, the local temperature around the lamp will be slightly higher for a long time, and the growth state of the plant will definitely be different from other places. This is not conducive to the overall temperature control of the greenhouse or plant factory.
LED plant light heat dissipation test
The heat dissipation performance of the LED plant light is directly related to its service life and the luminous efficiency of the lamp beads. If you want to see its heat dissipation performance, try an experiment to increase the temperature to an equilibrium state in a certain space for a period of time, and its internal structure will not be destroyed, and at a certain level Within time, the temperature of each part of the LED plant light will not increase with the prolonged high-intensity working time.
In cold regions, when planting medicinal plants and tomatoes, it is necessary to increase the temperature of the planting environment. In fact, the temperature rise of LED plant lights plays a big role. In fact, it can reduce additional temperature control costs and reduce energy waste. According to the actual scene of the application, select the corresponding LED plant light.
In addition to heat dissipation, there are several aspects that need to be paid attention to
Optical performance
In addition to the consideration of the ratio of red and blue light, it is also necessary to consider parameters such as luminous flux, luminous intensity, spectrum, luminous efficiency, and color temperature, because different plants have different requirements for red and blue light, luminous intensity, spectrum and color temperature.
Electrical performance
What needs to be paid attention to is the conversion of drive current and DC, as well as the need to pay attention to voltage drop, leakage, and static electricity, otherwise it will cause damage to the LED plant lamp beads and light decay, as well as people's safety issues.
Human radiation safety
The blue light of LED plant lights is the same as other electronic products, which is harmful to human eyes. This aspect should be paid attention to. Therefore, it is necessary to wear anti-blue goggles to protect the eyes.
The harm of blue light:
1. Blue light will aggravate the disease in the macular area of the retina;
2. Blue light can cause damage to the fundus after cataract surgery;
3. Blue light can cause blurred vision and cause visual fatigue;
4. Blue light can cause glare;
5. Blue light can inhibit the secretion of melatonin and disturb sleep.
Therefore, when purchasing LED high-power plant lights, the reliability of heat dissipation is an important technical indicator, and the yield and quality of later planted crops will also be directly reflected. Therefore, in addition to considering the price, the heat dissipation of LED plant lights is also worthy of attention.
