KR101167177B1 - Cooling system for artificial light sources of a plant-curture factory - Google Patents

Abstract

This plant factory is made with the plant's cultivation device, water supply and drainage device and air circulation, the control device to control the growth conditions including temperature, and LED light emitting device equipped with cooling piping on the heat sink. The plant has a whirlwind structure or a radial whirlwind structure to reduce the temperature gradient. In addition, the plant factory may further include a circulating water cooling device for cooling the circulating water discharged by the heat of vaporization due to natural fall, and a water distributor and an insulation target. In addition, the quantity divider can be operated by automatically distributing the quantity according to the situation connected to the situation detector, and the principle of quantity allocation is applied in principle that satisfies the formula z × 100x × A + y × (100-A). It may be.

   [Temperature fall of circulating water chiller: x, water supply rate A% by circulating water cooler]

   [Temperature drop of warming target: y, Water supply rate to warming target: (100-A)%]

   [Circulation water discharge temperature with light emitting device-circulating water input temperature = z]

In addition, the plant factory may be characterized in that the material of the forced water-cooled pipe is one of aluminum or copper or its alloy, the cross-section of the forced water-cooled pipe disposed on the heat sink, the bottom half of the plane to be joined to the heat sink or It may also take the shape of a square.

Plant factory, LED light emitting device, heat sink, water cooling device

Description

Cooling system for artificial light sources of a plant-curture factory

The present technology relates to the manufacture of a plant factory using efficient and durable LED lighting. In particular, in order to solve the problem of temperature rise due to the artificial light source of a plant factory in a closed plant factory, the present invention relates to a water-cooled cooling structure using a metal, in particular an aluminum material.

Since the entry into force of the Tokyo Protocol, regulations on carbon dioxide emissions have become a global concern, and there is an active development of alternative energy to support this policy. Therefore, the development of LED lighting to cope with general fluorescent lamps, incandescent lamps and halogens for energy saving is active, and plant factories are also at the point where technology development and research activities to cope with LED lighting in fluorescent lamps are being carried out.

In the case of a plant factory, the purpose is to maintain the optimum environment by appropriately controlling the temperature, light, humidity, and nutrients that plants can grow. In particular, by irradiating the wavelengths that plants can grow by using general fluorescent lamps and LED lighting system as an artificial light source, it does not receive any external environment and has the advantage of shortening the harvesting period by growing. Also, in poor regions where the four seasons are not clear or deserts and Antarctic plants cannot grow, the plant plant is blocked from the external environment so that the plant can be cultivated and no pests are generated. Especially, no pesticides are used. Can grow horticulture, flower crops, and two-way crops.

However, as a disadvantage of artificial light source, a lot of heat is generated when irradiating artificial light source using LED lighting system in a closed space, and the generated heat also weakens the guarantee of using 50,000 hours, which is an advantage of LED.

Therefore, one of the challenges for each company in mounting LEDs in lighting equipment is the problem of heat dissipation. It is true that the luminous efficiency is increased, but the heat generation amount of the LED chip is still considerable. If no heat dissipation measures are taken, the temperature of the LED chip becomes too high and the chip itself or the packaging resin deteriorates. This, in turn, leads to a decrease in luminous efficiency and shortening of chip life. In order not to lose the long life, which is the biggest feature of LED, it is necessary to develop technology to spread the heat of the chip to the outside. Currently, LED heat dissipation technology is being improved in various aspects such as LED chip structure, LED substrate problem, fluorescent material and epoxy. In particular, epoxy used in molding is one of the biggest causes of shortening the life of current commercially available white LEDs due to severe curing problems caused by high power light.

Currently, plant factories are generally investigating the light source that plants grow by using fluorescent lamps. The light emitting device has a structure in which 10 fluorescent lamps contain 32W in the first stage and one row, and the general seedling tray consists of three columns and two rows. As it enters, it generates instant amounts of heat. Therefore, operating the air conditioner, a cooling system, increases energy consumption and CO2 emissions.

Therefore, when LED lighting is used in a plant factory to remove such generated heat, a method to solve the temperature problem of the internal environment is to operate the air conditioner for 24 hours. Because the existing technology uses the aluminum heat dissipation structure, the heat released remains inside the plant factory, so it is inevitable to install a separate cooling system to remove the fundamental heat. The increase in electricity bills and energy consumption caused by the operation of air conditioners is a major problem. In particular, in the case of LED lighting, if the chip that emits light, the efficiency drops sharply when it rises above 60. Thus, this loses the fundamental reason for applying LEDs in ordinary fluorescent lamps.

The first object of the present invention is a technique for applying an efficient water-cooled cooling system for preventing the heat generated from the artificial light source LED to enter the plant factory.

Another object of the present invention is to create a method of introducing a water-cooled cooling system, but the arrangement of the water cooling tube so that a plurality of LED lighting fixtures can be uniformly cooled. This is a problem that may not be a big problem in the field of applying a small number of LED lamps in the related art, but in a field where a large number of LED lamps are densely applied, such as a plant factory, a simple water-cooled water cooling tube can only display a considerable temperature gradient. Therefore, minimizing this temperature gradient is an important factor in determining the life of LED lamps.

Another object of the present invention is to find a way to recycle the heat generated from the LED or to reuse the hot water again by cooling it in the cheapest way.

This plant factory is made with the plant's cultivation device, water supply and drainage device and air circulation, the control device to control the growth conditions including temperature, and LED light emitting device equipped with cooling piping on the heat sink.

The plant has a whirlwind structure or a radial whirlwind structure to reduce the temperature gradient.

In addition, the plant factory may further include a circulating water cooling device for cooling the circulating water discharged by the heat of vaporization due to natural fall, and a water distributor and an insulation target.

In addition, the quantity divider can be operated by automatically distributing the quantity according to the situation connected with the situation detector, and the principle of quantity allocation satisfies the formula z × 100 x × A + y × (100-A). May be applied.

   [Temperature fall of circulating water chiller: x, water supply rate A% by circulating water cooler]

   [Temperature drop of warming target: y, Water supply rate to warming target: (100-A)%]

   [Circulation water discharge temperature with light emitting device-circulating water input temperature = z]

In addition, the plant factory may be characterized in that the material of the forced water-cooled pipe is one of aluminum or copper or its alloy, the cross-section of the forced water-cooled pipe disposed on the heat sink, the bottom half of the plane to be joined to the heat sink or It may also take the shape of a square.

According to the present invention, it is possible to consume less power and increase space usage efficiency by using the LED lighting device.

The present invention can efficiently remove the heat generated by the use of a plurality of LED bulbs by introducing a forced water cooling method.

In addition, the present invention minimizes the temperature gradient of the heat sink by adopting the whirlwind type water cooling pipe, thereby raising the efficiency of the forced water cooling method to the maximum. In particular, the adoption of the cyclone type water cooling pipe can further increase the efficiency.

In addition, an important feature of the present invention is that the shape of the tube attached to the heat sink is in the form of flat surfaces 1005 and 1006 so as to contact the bottom surface with the heat sink as wide as possible to maximize the efficiency of heat dissipation.

Another feature of the present invention is that it has a circulating water cooling device 204 to thereby minimize the operating cost of the system.

Another feature of the present invention is to connect the water distributor (202) and the warming target 203 by using the circulating water cooling device and the circulating water temperature lowering effect of the warming target at the same time, the optimal circulating water for cooling the LED lighting device Implement a circular system.

Another feature of the present invention is that the tube to be attached to the heat sink is located on the same straight line of the LED lighting device to always ensure the cooling efficiency.

As another feature of the present invention, the pipe attached to the heat sink is branched from the tube into which the refrigerant is introduced and the tube discharged to provide cooling air to each LED lighting device, thereby reducing the movement path of the refrigerant to improve cooling efficiency. have.

Another feature of the present invention is that the heat sink is divided into two grooves, each provided with a groove, and each of the grooves are provided with a sealed structure in the shape of a tube when the heat sink is combined so that the cooling is carried out while the refrigerant is circulated in the heat sink itself. Accordingly, the structure is simple because there is no need for other tubes through which the refrigerant flows, and the cooling efficiency is improved as the heat sink itself is cooled.

The meanings of the terms used in the present invention and their behaviors will be explained.

The present invention is largely cultivated plant including a plant cultivation vessel, 2. water supply and drainage device, 3. light emitting device, 4. air circulation, temperature control, humidity control device for controlling the various elements necessary for plant growth, such as humidity. It relates to a plant factory for.

Therefore, first, look at the meaning of cultivation of plants as follows.

Cultivation of plants is also called plant culture in English name. It is an economic management system in which a person raises a crop by arranging crops for a certain purpose. In order to increase the income of agriculture, the quantity and unit price must be increased and production cost must be reduced. In other words, raising the quantity in consideration of the unit price and production cost is the basis of cultivation. In order to increase the maximum yield of crops, it is necessary to select crops with good genetics and to grow them with suitable cultivation techniques. Determining the yield of crops is the environment, varieties and cultivation techniques. As a way to increase the yield of crops, first, select varieties suitable for the growing environment, sowing and planting. The second is to secure the number of crops per unit area and to adjust the planting method. Third, nutritional growth is achieved through the proper use of fertilizers.

Therefore, the cultivation bowl of the plant in the present invention means a bowl that can be planted seed or seedling of the plant for the cultivation of the plant may or may not have a hole in the bottom depending on the proper growth conditions of the plant.

In the present invention, the water supply and drainage device refers to a device for supplying and draining water required for plant growth. The implementation of the present invention is usually performed indoors, and the apparatus for supplying and draining by a pump is almost essential. Naturally, the water supply and drainage device can be in the form of manual or automatic associated with the operation of a timer.

In the present invention, the light emitting device serves as a sunlight for plant growth, and the present invention uses an LED lighting device. This is one of the important features of the present invention as a variety of LED lighting device can be used and which LED lighting device is suitable depending on the type of plant to be grown and the growth stage and the growth environment of course, and those skilled in the art of course to adjust appropriately can do.

In the present invention, the control device for controlling the various elements necessary for the seedling of the plant, such as air circulation, temperature control, humidity, etc. by setting the various matters to be adjusted to form the internal environment of the closed plant factory in the form optimized for plant growth. Means an adjusting device with the function of adjusting.

However, there is a serious problem to be solved in applying the LED lighting device to the plant factory. The first is the fact that the LED lighting device generates considerable heat. This heat not only reduces the lighting efficiency, but also significantly shortens the life of the LED lighting device, so it is very difficult to apply the LED lighting device to the plant factory unless it can be effectively solved.

For example, let's take a look at one problem that may occur.

In order to maintain the light output of LED, optical performance must be satisfied. According to the table below, current and light output are proportional and inversely proportional to temperature. As shown in the table below, when the temperature rises, the light output decreases by 100% at 25 degrees (), and the light output decreases by 60% in yellow and 20% in white at 80 degrees.

Therefore, in the present invention, a number of methods were used to solve this problem, and a variety of experiments were conducted to find a new method. However, it is most efficient in a plant factory to directly lower the temperature of the LED lighting device by forcibly flowing cold water to a heat sink. I found out how. This is particularly effective in plant factories because of the fact that plant factories use a very large number of lights and the area of the heat sink is large enough to use a powerful cooling method.

Another feature of the invention lies in the introduction to the cooling scheme. The forced water cooling method described below is a cooling method using cooling water, which is for convenience of description. The forced water cooling method is a method in which water is forcibly supplied by external pressure and cooled, and cooling air, cooling oil, and cooling gas may be used in addition to the cooling water. That is, a method of cooling by supplying all materials that can be cooled may be used.

In the introduction of forced water cooling method, the cyclone type water cooling pipe is adopted to minimize the temperature gradient of the heat sink, thereby increasing the efficiency of the forced water cooling method to the maximum. Tornado water cooling piping has a radial form and a convergent form. As shown in FIG. 1, 1002 is a circulating water inlet, and 1003 is a circulating water outlet, so that the coolant flows into the center and flows like a tornado and returns outwards, for example, to the circulating water inlet 1002. If the temperature of the incoming circulating water is 20, it can be assumed that the temperature of the circulating water going to the circulating water discharge port 1003 becomes 35. Convergence forms the reverse flow of water.

The most preferred form is a spiny twist type water cooling piping. Because experimentally, the edge of the heat sink 1004 has a relatively easy heat dissipation than the center of the heat sink, and the density of the lighting device is generally constant, so the center point has the highest temperature. Therefore, in the general pipe type, the temperature gradient is considerably large, resulting in a difference in durability between the installed LED lighting devices and a difference in efficiency of the lighting device according to the temperature, thereby causing a problem of homogeneity of plant growth.

This problem could be solved by applying the cyclone type water cooling pipe.

In addition, as shown in Figure 3, the "radioactive duck cooling pipe" is disposed on the same straight line of the LED lighting device can directly cool the heat generated by the LED lighting device as a heat source to improve the cooling efficiency.

However, the cooling structure for heat dissipation of pellet type LED fluorescent lamps, line light sources, and surface light sources may be installed in a form of reciprocating the path directly above the LED lamps. The circulating water inlet is distributed by the number of fluorescent lamps, and the flow rate is distributed in consideration of the temperature gradient of the outside and the middle, and the pipe is attached to the heat sink to return to the starting point. You can choose the method. However, this may increase the unit price due to the complexity of the device, but there are many fields that can be applied to plants, such as plants, which can reduce the operating time of the air conditioner by more than 80% and also have high efficiency because of high efficiency.

In addition, an important feature of the present invention is that the tube attached to the heat sink is in the form of flat surfaces 1005 and 1006 in order to contact the bottom surface with the heat sink as wide as possible. Of course, if the heat sink is part of the curved surface of the tube can be bent depending on the shape of the heat sink. Therefore, the term planar here means a term corresponding to a normal tube having a curved surface, and does not mean only a perfect plane. The upper part of the tube may vary depending on necessity such as square or semicircle.

Another feature of the present invention is that it has a circulating water cooling device 204. The circulating water cooling device of the present invention does not exclude the use of various cooling means outside of the device. In the present invention, as shown in 204 of FIG. 4, a method of naturally cooling by using evaporation heat is performed by dispersing water in free air and freely dropping it. This method can be applied to all seasons, but especially the colder the outside air, the more effective it is. This method is a good way to cool down the circulating water sufficiently. It was found that it is a good way to use it properly for keeping warm.

For example, as shown in FIG. 5, the circulating water is cooled down while the circulating water is discharged down the inner wall of the wall to warm down the insulating object. FIG. 6 is a side view of the water dispersion and distribution plate of FIG. 5 installed between the walls of the object to be kept warm. However, this is only one example and can assume various warming objects.

Therefore, another feature of the present invention is to connect the water distributor 202 and the warming target 203 by using the circulating water cooling device and the circulating water temperature lowering effect of the warming target at the same time for optimal circulation for cooling the LED lighting device We have implemented a water circulation system. The water distributor 202 may be provided with a situation detector 201 to automatically detect the surrounding weather conditions to check the situation to help control the water distributor. It may also have a water refill valve 207 as shown in Figure 4 can compensate for the water evaporation and loss of water in the intermediate process.

Another feature of the present invention is that through a number of repeated experiments to make the following formula for how this quantity allocation is desirable.

       Quantity Distribution Formula

           Temperature drop of the circulating water chiller: x, water supply rate A%

           Temperature drop of the warming target: y, Water supply rate to the warming target: (100-A)%

           Circulating water discharge temperature with light emitting device-Circulating water input temperature = z

           satisfies the expression z × 100 x × A + y × (100-A)

Another feature of the present invention is, as shown in Figure 7, the cold air inlet pipe 1010 is installed on the heat sink 1004 installed in the LED lighting device on one side, the cold air is discharged to the other side It is provided with a cold air discharge pipe 1020, and the refrigerant supplied by connecting the branch pipe (1011) for branching the cold air while passing on the same straight line as the LED lighting device between the cold air inlet pipe (1010) and the cold air discharge pipe (1020). As the refrigerant is supplied and branched from the inlet pipe 1010 and moved to the branch pipe 1011, and then discharged through the refrigerant discharge pipe 1020, the path of cooling air is reduced, the refrigerant is heated by the contact of the LED lighting device. It is possible to prevent the cooling efficiency from falling by reducing the distance from which the cooling efficiency falls, so that the cooling efficiency can be improved.

As another feature of the present invention, as shown in FIG. 8, the heat sink 1004 is divided into an upper heat sink 1004a and a lower heat sink 1004b, and the upper groove 1020 and the lower groove, respectively, in positions facing each other inward. 1030 is formed. The upper groove 1020 and the lower groove 1030 are formed to form a passage when the upper heat sink 1004a and the lower heat sink 1004b are coupled to each other, and the upper grooves 1020 and the lower groove 1030 are formed. The form may be in the form of "radio duck cooling pipe" or branched pipe. An airtight body 1040 is provided between the upper heat sink 1004a and the lower heat sink 1004b to be coupled. When the upper heat sink 1004a and the lower heat sink 1004b are coupled to each other, the upper groove 1020 and the lower groove 1030 are in contact with each other to form a pipe through which the refrigerant can be supplied to the internal space, and a sealing body (between each pipe) 1040 may be provided to prevent the refrigerant from leaking between the upper heat sink 1004a and the lower heat sink 1004b. That is, the refrigerant may move between the upper groove 1020 and the lower groove 1030 to cool the LED lighting device, and may cool the heat sink 1004 itself heated by the LED lighting device. In addition, a plurality of heat dissipation protrusions 1050 may be further provided on an upper portion of the heat dissipation plate 1004 so as to increase an area of heat dissipation. The heat dissipation protrusion 1050 may increase the cooling area of the heat dissipation plate 1004 itself, thereby improving cooling efficiency.

1 is a perspective view of a whirlwind type water cooling pipe formed on the LED heating device

FIG. 2 is a plan view in which a whirlpool type water cooling pipe is formed on the LED heating device

Fig. 3 is a plan view showing the different arrangement state of the whirlwind type water cooling piping on the LED heating device

4 is a flow chart of the process of cooling the circulating water discharged from the water cooling pipe

FIG. 5 is a view illustrating a process in which the circulating water is cooled while the circulating water is discharged down the inner wall of the wall to warm down the insulating object as one embodiment of the insulating object.

6 is a side view of the water dispersion and distribution plate installed between the walls of the insulation target

7 is a plan view of the branch-type water cooling piping on the LED heating device

8 is a cross-sectional view showing the heat sink self cooling structure on the LED heating device

9 is a view inside the plant factory of one embodiment

Fig. 10 LED heat radiation device that can be applied to plant factories

11 is a front view of Pellet type LED fluorescent lamp and cooling structure for heat dissipation

FIG. 12 Side View of Pellet Type LED Fluorescent Tube and Cooling Structure for Heat Dissipation

13 is a perspective view of another Pellet type LED fluorescent lamp and a cooling structure for heat dissipation

14 is a front view of another Pellet type LED fluorescent lamp and the cooling structure for heat dissipation

    1001: top of the LED lamp,

    1002, 402: circulating water inlet of water cooling pipe (cooling water outlet in case of convergence type)

    1003, 403: circulating water outlet (cooling water inlet in case of convergence type)

    1004, 404: heat sink, 1005: half moon pipe section

    1006: heat sink contact portion 1010: cold air inlet pipe

    1011: branch pipe 1020: cold air discharge pipe

    1004a: lower heat sink 1004b: upper heat sink

    1020: upper groove 1030: lower groove

    1040: sealing body 1050: heat radiation projection

    201: situation detector, 202: quantity divider

    203: insulation target, 204: circulating water cooling device

    205: water sprinkler, 206: drip tray

    207: water supplement valve, 208: effluent circulating water

    209: influent circulation water

    301, 301-1, 301-2: wall surface,

    302: A device for transferring heat of the discharged circulating water to the warming target

    303: Water Dispersion and Distribution Plate

    401: LED chip, 405: Pellet type LED fluorescent lamp

Claims (16)

Plant cultivation device, air supply and drainage device and air circulation, a control device for adjusting the conditions of growth, including temperature, and a LED light emitting device equipped with a cooling pipe on the heat sink, It further includes a circulating water cooling device for cooling the circulated water discharged by the heat of vaporization due to natural fall, a water divider and an insulation target, The quantity divider is connected to the situation detector and operates by automatically distributing the quantity according to the situation, but the principle of quantity distribution is a plant factory that satisfies the formula z × 100 x × A + y × (100-A). Temperature drop of the circulating water chiller: x, water supply rate A% Temperature drop of the warming target: y, Water supply rate to the warming target: (100-A)% Circulating water discharge temperature with light emitting device-Circulating water input temperature = z The plant factory according to claim 1, wherein the cooling pipe has a tornado structure to reduce the temperature gradient. The plant factory according to claim 1, wherein the cooling piping has a radial whirlwind structure to reduce the temperature gradient. delete delete delete delete  The plant factory according to any one of claims 1 to 3, wherein the material of the forced water-cooled piping is one of aluminum, copper or an alloy thereof. The plant factory according to any one of claims 1 to 3, wherein the cross-sectional view of the forced water-cooled pipe disposed on the heat sink has a flat surface so that the bottom surface can be joined to the heat sink. 10. The plant factory according to claim 9, wherein the cross-sectional view of the forced water-cooled piping disposed on the heat sink has a half moon or a square shape. 2. The plant factory according to claim 1, wherein the LED light emitting device is a pellet type, an LED fluorescent light of a line light source and a surface light source, and the cooling piping is bonded to the heat sink directly above the fluorescent light and arranged in a reciprocating manner. Plant cultivation device, air supply and drainage device and air circulation, a control device for controlling the conditions of growth, including temperature and the LED light emitting device provided with a cooling piping on the heat sink, The cooling pipe is It is disposed on one side of the heat sink, the cold air inflow pipe, It is disposed on the other side of the heat sink, the cold air discharge pipe for discharging cold air, and Branch pipes branched into the cold air inlet pipe and connected to the cold air discharge pipe, / RTI > The branch pipe is branched into a plurality and connected to the cold air inlet pipe and the cold air discharge pipe, respectively, disposed at positions of the plurality of LED light emitting devices, and the cold air flowing from the cold air inlet pipe cools the LED light emitting device. A plant factory that can reduce the movement of cold air as it exits the cold air outlet. Plant cultivation device, air supply and drainage device and air circulation, a control device for controlling the conditions of growth, including temperature and the LED light emitting device provided with a cooling piping on the heat sink, The heat sink is The first heat sink is bisected and located in one direction, the first groove is formed in the other side, A second heat sink disposed on the other side facing the first heat sink and having a second groove at a position facing the first groove on one side; An airtight body disposed between the first heat sink and the second heat sink and sealing the first groove and the second groove at a position where the first heat sink and the second heat sink are in contact; When the first heat sink and the second heat sink is coupled to each other includes a cooling pipe provided in the form of a pipe while the first groove and the second groove facing each other, The hermetically sealed plant may be disposed between the first heat sink and the second heat sink coupled to form the cooling pipe to seal the refrigerant circulated in the cooling pipe to prevent external leakage. The heat dissipation protrusion of claim 13, further comprising: a heat dissipation protrusion disposed on one side of the first heat dissipation plate and protruding on one side at a predetermined interval. The heat dissipation protrusion may increase the contact area between the first heat sink and the outside air to improve heat dissipation efficiency. Botanical plant. The plant factory of claim 13, wherein the heat dissipation pipe is refracted a plurality of times to form a tornado. The plant factory according to claim 13, wherein the heat dissipation pipe is configured to be supplied with cold air while branching into a plurality of cold air inflows.

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