KR102928362B1 - Complex heat dissipation system for greenhouse thermal environment control - Google Patents

Abstract

The present invention relates to a composite heat dissipation system for controlling the heat environment of a greenhouse, which can improve the heat dissipation efficiency of a greenhouse heat dissipation pipe and partially control the amount of heat dissipation, thereby providing a heat environment suitable for plant cultivation, thereby improving the growth and quality of crops and reducing energy costs, as well as reducing temperature deviation along the length of the heat dissipation pipe of the greenhouse.
A composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention comprises: a heat exchange line section having a plurality of heat dissipation pipes arranged in a plant cultivation section inside the greenhouse and connected to a hot water supply source and a cold water supply source and arranged in the longitudinal direction of the plant cultivation section, a first distribution head connected to one end of the plurality of heat dissipation pipes, and a second distribution head connected to the other end of the plurality of heat dissipation pipes; a water supply line having one end connected to the hot water supply source or the cold water supply source and the other end connected to the first distribution head or the second distribution head to supply hot or cold water to be supplied to the heat dissipation pipes; a water recovery line having one end connected to the second distribution head or the first distribution head and the other end connected to the hot water supply source or the cold water supply source so that the hot or cold water passing through the heat dissipation pipes is recovered; a control valve installed in the water supply line and the water recovery line so that a closed loop of circulation of hot water or a closed loop of circulation of cold water is formed; And it is characterized by including a pump for pumping hot water supplied through the hot water supply source or cold water supplied through the cold water supply source.

Description

Complex heat dissipation system for greenhouse thermal environment control

The present invention relates to a composite heat dissipation system for controlling the thermal environment of a greenhouse, and more particularly, to a composite heat dissipation system for controlling the thermal environment of a greenhouse, which can improve the heat dissipation efficiency of a greenhouse heat dissipation pipe and partially control the amount of heat dissipation as needed, thereby providing a thermal environment suitable for growing plants, thereby improving the growth rate and quality of crops and reducing energy costs, and can also quickly equalize the temperature deviation along the length of the heat dissipation pipe of the greenhouse.

In general, facility horticulture involves planting crops in cultivation areas set up inside greenhouses such as glasshouses or vinyl houses, and managing the environment to maintain ideal conditions for crop cultivation, such as temperature, humidity, and _CO2 .

Greenhouses are equipped with various additional facilities to control temperature, humidity, _CO2 , etc., including heating and cooling systems for temperature control, and _CO2 supply systems for carbon dioxide supply.

The heating system of a greenhouse uses a forced convection cooling/heating system that uses a blower to blow hot or cold air into the greenhouse and cools/heats the interior, and a pipe-type cooling/heating system that supplies hot or cold water through a heat pipe and circulates it to cool/heat using natural convection and radiation.

Pipe-type heating and cooling systems require relatively high facility investment costs because they require the installation of heat dissipation pipes, but they are widely used because they offer superior heating and cooling effects and are easy to control, such as humidity, compared to blower-type heating and cooling systems.

However, the pipe-type heating and cooling system has a disadvantage in that it cannot effectively perform heat dissipation due to the non-uniform heat flux condition of heat dissipation (hereinafter, the concept including the warmth and cold of the heat dissipation) from the heat dissipation pipes arranged along the bed and the small heat dissipation area of the heat dissipation pipes. Here, the non-uniform heat flux condition means that the temperature of the heat medium (hot water or cold water) moving along the heat dissipation pipe decreases along the length from the inlet side, so if the pipe diameter is constant, the heat dissipation amount gradually decreases due to the same heat dissipation area condition.

As mentioned above, the pipe-type heating and cooling system has a large temperature deviation in the longitudinal direction due to the structural characteristics of the greenhouse due to poor heat dissipation, and most greenhouses control the overall temperature based on the temperature monitored by a sensor placed in the center, so there is a deviation in the average value, which has the disadvantage of causing uneven growth of crops in the greenhouse and lowering the quality of the crops.

In addition, the pipe-type heating and cooling system has the disadvantage of causing an increase in the unit cost of crop cultivation due to an increase in heating and cooling costs due to poor heat dissipation.

In particular, recently, multi-row, multi-layer cultivation methods have been commercialized in greenhouses to increase crop production in limited spaces, and thus, a complex heat dissipation system that performs comprehensive thermal environment control, including effective heating and cooling and dehumidification, at low energy costs is urgently needed.

In addition, greenhouses have the problem of further increasing operating costs (cooling costs) due to the increased cooling load required to lower the temperature to an appropriate growing temperature for plants, as the internal temperature rises due to solar radiation during the daytime in summer or winter.

In addition, if the internal temperature of the greenhouse rises excessively, the side windows and ceiling windows need to be opened. However, in this case, the _CO2 applied to the greenhouse leaks out and is wasted, which reduces the fertilization effect and increases management costs. In addition, there is a disadvantage in that the humidity cannot be accurately controlled.

Korean Patent No. 10-2043749 "Greenhouse Heating and Cooling System" Korean Patent Registration No. 10-0615044, "Hot water heating device for greenhouses and vinyl houses."

The present invention has been proposed with the above in mind, and its purpose is to provide a complex heat dissipation system for controlling the heat environment of a greenhouse, which can improve the heat dissipation efficiency of a greenhouse heat dissipation pipe and partially control the amount of heat dissipation as needed, thereby providing a heat environment suitable for growing plants, thereby improving the growth rate and quality of crops and reducing energy costs.

Another object of the present invention is to provide a composite heat dissipation system for controlling the thermal environment of a greenhouse, which can quickly equalize the temperature deviation along the length of the heat dissipation pipe of the greenhouse.

Another object of the present invention is to provide a composite heat dissipation system for controlling the thermal environment of a greenhouse, which can perform heating and cooling using waste heat of the greenhouse and reduce energy costs by performing a dehumidifying function without using electric energy.

In order to achieve the above object, a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention comprises: a greenhouse formed so that sunlight is incident thereon; a heat exchange line section having a plurality of heat dissipation pipes arranged in a plant cultivation section inside the greenhouse and connected to a hot water supply source and a cold water supply source and arranged in the longitudinal direction of the plant cultivation section, a first distribution head connected to one end of the plurality of heat dissipation pipes, and a second distribution head connected to the other end of the plurality of heat dissipation pipes; a water supply line having one end connected to the hot water supply source or the cold water supply source and the other end connected to the first distribution head or the second distribution head to supply hot or cold water to be supplied to the heat dissipation pipes; a water recovery line having one end connected to the second distribution head or the first distribution head and the other end connected to the hot water supply source or the cold water supply source so that the hot or cold water passing through the heat dissipation pipes is recovered; It is characterized by including a control valve installed in the water supply line and the water recovery line so that a closed loop of circulation of hot water or a closed loop of circulation of cold water is formed; and a pump for pumping hot water supplied through the hot water supply source or cold water supplied through the cold water supply source.

The above heat exchange line section may further include a variable heat dissipation member that is movably installed in the heat dissipation pipe to increase the heat dissipation surface area of a specific portion.

The above heat dissipation pipe may be formed with a structure in which a heat dissipation part formed as a male screw thread protrudes from the outer surface of the pipe.

The above variable heat dissipation member may be composed of a heat dissipation body having a female screw portion that is screw-connected to the male screw thread of the heat dissipation pipe and moves.

The above heat dissipation pipe may be configured with a heat absorption section that absorbs radiant energy inside the greenhouse.

The above heat absorption portion may be composed of a black body coating portion laminated on the heat dissipation pipe.

And a hydrophobic coating layer can be laminated on the black body coating portion.

A photocatalytic layer for generating carbon dioxide and having an antibacterial effect can be formed on the black body coating portion when light is applied.

Preferably, the hot water supply source has a heat storage tank, the cold water supply source has a cold storage tank, the water supply line has a first water supply line connected to the heat storage tank and one side of the first distribution header, and a second water supply line connected to the cold storage tank and one side of the second distribution header, while the water recovery line has a first water recovery line connected to the other side of the second distribution header and the heat storage tank, and a second water recovery line connected to the other side of the first distribution header and the cold storage tank.

The above control valve and the above pump can be installed in the first and second water supply lines and the first and second water recovery lines, respectively.

Meanwhile, a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention may include an upper plant cultivation section formed in one or more layers in the height direction of the greenhouse, which is an upper portion of the plant cultivation section, an upper heat exchange line section arranged in the upper plant cultivation section and composed of a heat dissipation pipe having the same structure as the heat exchange line section, a first distribution header, and a second distribution header; a water distribution supply line connected between the first distribution header of the upper heat exchange line section and the water supply line, and between the second distribution head and the water supply line; a recovery water collection line connected between the second distribution header of the upper heat exchange line section and the water recovery line, and between the first distribution head and the water recovery line; and an upper control valve installed at a connection portion between the water distribution supply line and the recovery water collection line and the first distribution header and the second distribution head of the upper heat exchange line section.

The above water distribution supply line may include a first water distribution supply line connected to the first water supply line and the first distribution header of the upper heat exchange line section, and a second water distribution supply line connected to the second water supply line and the second distribution header of the upper heat exchange line section.

The above-mentioned water recovery line may include a first water recovery line connected to the first water recovery line and the second distribution header of the upper heat exchange line section, and a second water recovery line connected to the second water recovery line and the first distribution header of the upper heat exchange line section.

According to the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention, heating and cooling can be performed using a plurality of heat dissipation pipes arranged in a parallel structure between the first and second distribution heads, a heat dissipation part having a male screw structure is formed on the heat dissipation pipe to improve the heat dissipation efficiency of the heat dissipation pipe, and a variable heat dissipation member having excellent heat dissipation characteristics is movably connected so that the heat dissipation efficiency can be increased by moving the position to a part where the heat flux is relatively reduced, thereby maintaining a relatively even temperature over the entire length of the heat dissipation pipe, and also controlling the amount of heat dissipation partially as needed, thereby providing a thermal environment appropriate for the cultivation of plants, thereby improving the growth and quality of crops, and reducing energy costs.

In addition, according to the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention, a heat absorbing part made of a black body is provided in the heat dissipation pipe so that radiant energy can be absorbed to perform a cooling function, and the absorbed waste heat can be recycled as heating energy in winter or at night. In addition, moisture is condensed and removed in the hydrophobic coating layer formed in the heat dissipation pipe, so that a dehumidifying function can be performed, thereby minimizing the use of electric energy, reducing energy costs, and implementing an eco-friendly greenhouse.

In addition, the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the present invention can effectively perform temperature control and humidity control for cooling the inside of the greenhouse while minimizing the opening of side windows and ceiling windows by absorbing solar radiation energy, and can maintain the fertilization effect by preventing the leakage of fertilized _CO2 to the outside due to the opening of side windows and ceiling windows, and can reduce management costs by reducing _CO2 waste, and can prevent pests by blocking the inflow of pathogens contained in the outside air, and can prevent a decline in productivity and quality that may occur due to poor growth of crops due to the rapid inflow of cold air in the winter.

Figure 1 is a configuration diagram showing a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention.
Figure 2 is a perspective view showing a heat dissipation pipe and variable heat dissipation member of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention.
Figure 3 is a cross-sectional view for explaining a heat dissipation pipe of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention.
FIGS. 4a and 4b are drawings for explaining the operation of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention. FIG. 4a is a drawing showing a heating supply mode in which hot water from a heat storage tank circulates, and FIG. 4b is a drawing showing a cooling and dehumidification mode in which cold water from a cold storage tank circulates.
Figure 5 is a schematic diagram showing a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the second embodiment of the present invention.
Figure 6 is an enlarged view of part B of Figure 5.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings, and the same reference numbers will be given to the same components.

Meanwhile, detailed descriptions of the components, functions, and effects of each drawing, which can be easily understood by those skilled in the art from general techniques, are briefly or omitted. Furthermore, since the present invention is characterized by a composite heat dissipation system for controlling the thermal environment of a greenhouse, the relevant parts are primarily illustrated and described, and the description of the remaining parts is briefly or omitted.

Figure 1 is a schematic diagram showing a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention, and is a simplified and symbolic illustration of the shape depicted on a plane.

Referring to FIG. 1, a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention comprises a greenhouse (1), a hot water supply source (2), a cold water supply source (3), a heat exchange line (4), a water supply line (5), a water recovery line (6), a control valve (7), and a pump (8), and is characterized in that it is configured to provide a thermal environment suitable for growing plants by improving heat dissipation efficiency and partially controlling the amount of heat dissipation as needed.

There are no particular restrictions on the structure or shape of a greenhouse (1) as long as it is formed to allow sunlight to enter and has a cultivation space for growing plants inside, but a glass greenhouse with transparent glass installed on a greenhouse frame (not shown) or a vinyl greenhouse with transparent vinyl installed on a greenhouse frame can be used as a representative example.

In addition, the greenhouse (1) is configured to have a plurality of rows of plant cultivation sections (14) in which plants are planted and grown. The plant cultivation section (14) can be typically configured as a culture medium frame on which a culture medium (not shown) in which plants are planted is placed, but can also be configured as an elevated cultivation device (not shown) filled with soil in which plants such as strawberries are planted.

The hot water supply source (2) is a component that provides hot water supplied to the heat exchange line section (4). As long as it can provide hot water, it can be implemented in various ways without any special restrictions on shape or structure. For example, the hot water supply source (2) is shown as an example equipped with a storage tank (22) for storing hot water, but it may also be equipped with a boiler (not shown) for generating hot water.

The cold water supply source (3) is a component that supplies cold water to the heat exchange line section (4). As long as it can supply cold water, it can be implemented in various ways without any special restrictions on shape or structure. For example, the cold water supply source (3) is shown as an example equipped with a cold storage tank (32) for storing cold water, but it may further be equipped with a cold water generating device (not shown) for generating cold water.

The heat exchange line section (4) is arranged at the bottom of the plant cultivation section (14) inside the greenhouse (1) and is connected to a hot water supply source (2) and a cold water supply source (3), and is provided with a plurality of heat dissipation pipes (41) arranged in the length direction of the plant cultivation section (14), a first distribution head (42) connected to one end of the plurality of heat dissipation pipes (41), and a second distribution head (43) connected to the other end of the plurality of heat dissipation pipes (41).

A plurality of heat dissipation pipes (41) are arranged in parallel between the first and second distribution heads to form a single heat dissipation pipe unit. This single heat dissipation pipe unit performs the function of raising the temperature of the greenhouse by releasing warm air to the outside when the temperature of the single greenhouse (1) is lower than the set temperature and hot water supplied from the hot water supply source (2) flows, and the function of lowering the temperature of the greenhouse by releasing cold air to the outside when the temperature of the greenhouse is higher than the set temperature and cold water supplied from the cold water supply source (3) flows.

The first distribution head (42) and the second distribution head (43) are pipes that perform the function of a distribution head to supply and recover water (hot water, cold water) to a plurality of heat dissipation pipes (41), and are therefore composed of pipes with a larger inner diameter than the heat dissipation pipes.

Fig. 2 is a perspective view showing a heat dissipation pipe and a variable heat dissipation member of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention, and is an enlarged perspective view of part A of Fig. 1. Fig. 3 is a cross-sectional view for explaining a heat dissipation pipe of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention.

Referring to FIGS. 1 and 2, the heat exchange line section (4) according to the present invention is provided with a plurality of variable heat dissipation members (45) so as to quickly equalize the temperature difference along the longitudinal direction of the heat dissipation pipe (41) of the greenhouse (meaning the direction from the first distribution head to the second distribution head).

A variable heat dissipation member (45) is movably installed in a heat dissipation pipe (41) to increase the heat dissipation surface area of a specific area, and can be formed in various shapes or structures without any special restrictions as long as it has a structure in which the heat dissipation area per unit length is formed larger than that of the heat dissipation pipe.

For example, the variable heat dissipation member (45) is configured as a heat dissipation body having a female screw portion (452) formed therein so as to be moved by being screw-connected to a heat dissipation pipe (41). Here, the heat dissipation body is illustrated as having a number of heat dissipation fins (454) protruding from the outer surface to increase the heat dissipation area, but may also be configured as a porous body having a number of air flow holes (not shown) formed therein.

And the heat dissipation pipe (41) has a structure in which a heat dissipation part (414) formed in the form of a male screw thread protrudes from the outer surface of the pipe so that the female screw part (452) of the variable heat dissipation member (45) is screw-connected. Here, the heat dissipation part (414) protruding in the form of a male screw thread performs a function similar to a heat dissipation fin.

Meanwhile, the heat dissipation pipe (41) is configured with a heat absorption part (415) that absorbs radiant energy inside the greenhouse so as to reduce energy costs by performing heating and cooling using waste heat of the greenhouse (1), as shown in FIG. 3.

The above heat absorption part (415) is composed of a black body coating part (415a) formed by laminating a black body capable of absorbing radiant energy inside the greenhouse onto a heat dissipation pipe.

Here, a black body refers to an object whose solar radiation energy absorption rate is theoretically 1, and can effectively absorb solar radiation energy across the entire wavelength range and mitigate the diffusion of solar radiation energy into the environment. It can quickly absorb some of the solar radiation energy entering the greenhouse through the heat highway function that absorbs it at the side walls of the greenhouse, thereby mitigating the temperature rise inside the greenhouse.

For example, the black body coating portion (415a) can be formed by painting a known black body paint having high emissivity, heat resistance, wear resistance, and chemical resistance onto the heat dissipation pipe (41).

Meanwhile, the heat exchange line section (4) according to the present invention has a hydrophobic coating layer (416) laminated on the heat dissipation pipe so as to reduce energy costs by performing a dehumidifying function without using electrical energy.

It is preferable that the hydrophobic coating layer (416) be laminated on the outer surface of the black body coating portion (415) to ensure smooth moisture removal.

And the hydrophobic coating layer (416) is formed by laminating hydrophobic compounds. Here, the hydrophobic compounds are substances that do not have a group that is affinity for water molecules, and various known products can be applied, so a detailed description thereof is omitted.

In addition, a photocatalyst layer (417) is formed by attaching photocatalyst particles (417a) to the heat dissipation pipe (41) to generate carbon dioxide along with an antibacterial effect when light is applied.

The photocatalyst layer (417) includes photocatalyst particles such as titanium dioxide. In addition to titanium dioxide, the photocatalyst particles may be a single or composite of metal oxides such as tungsten oxide or zinc oxide. In addition, the photocatalyst layer may be formed by adding titanium dioxide particles to a solvent and then spraying them so that the titanium dioxide particles are attached to the surface of the hydrophobic coating layer. At this time, ethanol, isopropyl alcohol, acetone, etc. may be used as the solvent.

To briefly explain the working principle of a photocatalyst, a photocatalyst has a valence band E, a conduction band D, and a band gap G. The band gap G is a unique value of the photocatalyst. In the case of titanium dioxide (TiO2), it is about 3 eV, which is approximately 400 nm when converted to a wavelength. When light energy is irradiated on a titanium dioxide (TiO2) photocatalyst, an electron e- and a hole h+ pair are generated inside the photocatalyst and are extracted to the surface. When this reacts with an adsorbent, A is reduced to A- and the alkali R is oxidized to R+, resulting in a photocatalytic reaction. Due to the excitation phenomenon of electrons moving to the conduction band D, a hole h+ is generated where the electron e- has escaped. This state is the excited state of the photocatalyst. At this time, since the oxidizing power of the hole h+ is much greater than the reducing power of the electron e-, when the electron e- is excited, various pollutants such as volatile organic substances contained in the greenhouse air act as electron donors to the hole h+ remaining in the valence band E, oxidizing and decomposing various pollutants, and the following chemical reaction occurs on the surface of the photocatalyst, purifying the air.

VOC (volatile organic compounds) → CO ₂ + H ₂ O + Mineral acid

As mentioned above, when light energy is applied to the photocatalyst, organic matter in the air is oxidized into water ( _H2O ) and carbon dioxide ( _CO2 ), which performs antibacterial and deodorizing effects, and carbon dioxide ( _CO2 ) performs fertilizer effect for plant cultivation. In addition, the photocatalytic deodorizing reaction mentioned above converts _O2 generated by the reduction of oxygen into hydrogen peroxide, which is a more oxidizing radical OH, or into water and oxygen.

The water supply line (5) is a pipe through which hot or cold water is supplied to the heat dissipation pipe (41), and one end is connected to a hot water supply source (2) or a cold water supply source (3) and the other end is connected to a first distribution head (42) or a second distribution head (43).

To be more specific, the water supply line (5) includes a first water supply line (51) connected to one side of the storage tank (22) and the first distribution header (42), and a second water supply line (52) connected to one side of the cold storage tank (32) and the second distribution header (43).

The water recovery line (6) is connected at one end to the second distribution head (43) or the first distribution head (42) so that hot or cold water passing through the heat dissipation pipe (41) is recovered, and the other end is connected to the hot water supply source (2) or the cold water supply source (3).

To be more specific, the water recovery line (6) includes a first water recovery line (61) connected to the other side of the second distribution header (43) and the storage tank (22), and a second water recovery line (62) connected to the other side of the first distribution header (42) and the storage tank (32).

The control valve (7) is a valve installed in the water supply line (5) and the water recovery line (6) so that a closed loop of circulation of hot water or a closed loop of circulation of cold water is formed. Here, the control valve (7) is composed of first to fourth control valves (71, 72, 73, 74) installed in the first and second water supply lines (51, 52) and the first and second water recovery lines (61, 62). Here, it is preferable that the first to fourth control valves (71, 72, 73, 74) are configured as electric automatic control valves so that they automatically perform opening and closing operations according to an external signal.

The pump (8) is a pumping means for pumping hot water supplied through a hot water supply source (2) or cold water supplied through a cold water supply source (3), and is composed of first to fourth pumps (81, 82, 83, 84) installed in the first and second water supply lines (51, 52) and the first and second water recovery lines (61, 62), respectively.

Hereinafter, the operation of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention will be briefly described.

FIGS. 4A and 4B are drawings for explaining the operation of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention. FIG. 4A is a drawing showing a heating supply mode in which hot water from a heat storage tank circulates, with dotted arrows indicating the flow path of the hot water, and FIG. 4B is a drawing showing a cooling and dehumidification mode in which cold water from a cold storage tank circulates, with solid arrows indicating the flow path of the cold water.

Referring to FIG. 4a, a composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention can perform a heating supply mode to maintain an appropriate temperature of plants planted in a plant cultivation section (14) when the temperature inside the greenhouse is low, such as in winter or at night, by supplying hot water to a heat exchange line section (4).

In this heating supply mode, when the first pump (81) and the third pump (83) are operated while the first control valve (71) and the third control valve (73) are opened and the second and fourth control valves (72, 74) are closed under the control of a control unit (not shown), hot water from the storage tank (22) is supplied to the first distribution header (42) through the first water supply line (51) and then distributed to a plurality of heat dissipation pipes (41).

The hot water supplied through the heat dissipation pipe (41) releases heat to raise the temperature of the plant cultivation section (14), and the hot water from the plurality of heat dissipation pipes (41) passing through the plant cultivation section is collected in the second distribution head (43), flows along the first water recovery line (61), and then is recovered to the heat storage tank (22).

In the process of performing the heating supply mode through the aforementioned hot water circulation process, the heat dissipation pipe (41) is formed with a heat dissipation part (414) formed with a male screw thread, so that it can effectively release heat.

In addition, since a plurality of variable heat dissipation members (45) with excellent heat dissipation characteristics are movably connected to the heat dissipation pipe (41), if the heat dissipation efficiency is increased by positioning them close to the second distribution head (43) where the heat flux (amount of heat flowing per unit area per unit time) is relatively reduced (the temperature of the hot water is lowered), a relatively even temperature can be maintained over the entire length of the heat dissipation pipe. In addition, the variable heat dissipation members (45) can be adjusted to provide warmth more accurately and quickly toward the plants by moving them to the planted area and positioning them in the correct position.

Meanwhile, referring to FIG. 4b, the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the first embodiment of the present invention can perform a cooling supply mode to maintain an appropriate temperature of plants planted in a plant cultivation section when the temperature inside the greenhouse is high, such as in summer or during the day, by supplying cold water to the heat exchange line section (4).

In this cooling supply mode, when the second pump (82) and the fourth pump (84) are operated while the second control valve (72) and the fourth control valve (74) are opened and the first and third control valves (71, 73) are closed under the control of a control unit (not shown), the cold water of the cold storage tank (32) is supplied to the second distribution header (43) through the second water supply line (52) and then distributed to a plurality of heat dissipation pipes (41).

The cold water supplied through the heat dissipation pipe (41) releases cold air to lower the temperature of the plant cultivation section (14), and the cold water from the plurality of heat dissipation pipes (41) passing through the plant cultivation section (14) is collected from the first distribution head (42), flows along the second water recovery line (62), and is then recovered to the cold storage tank (32).

In the process of performing the cooling supply mode through the aforementioned cold water circulation process, the heat dissipation pipe (41) is formed with a heat dissipation part (414) formed with a male screw thread, so that it can effectively release cold air, and since the variable heat dissipation member (45) is movably connected, when it is positioned close to the first distribution head (42) where the temperature of the cold water relatively increases to increase the heat dissipation efficiency, the temperature can be maintained by relatively evenly releasing cold air over the entire length of the heat dissipation pipe.

Meanwhile, since a black body coating portion (415a) is formed on the heat dissipation pipe (41), when sunlight is incident, the temperature inside the greenhouse (1) rapidly rises due to solar radiation energy. At this time, solar radiation energy is usually about 800 to 1000 W/m ² , and the black body coating portion (415a) with high absorption rate performs an appropriate auxiliary cooling effect before the solar radiation energy is diffused into the greenhouse. In this way, the radiation energy absorbed by the black body coating portion (415a) is absorbed by the water flowing through the heat dissipation pipe (41) and discharged to the outside.

In addition, since a hydrophobic coating layer (416) is formed on the heat dissipation pipe (41), when cold water flows, moisture contained in the greenhouse air condenses into water molecules on the heat dissipation pipe and then falls downward, thereby performing the function of controlling humidity.

In addition, since a photocatalyst layer (417) formed by attaching photocatalyst particles (417a) to the heat dissipation pipe (41) is formed, when light is applied, carbon dioxide necessary for plant cultivation can be generated along with an antibacterial effect by the photocatalyst operating principle described above.

Hereinafter, other embodiments according to the present invention will be described. Detailed descriptions of components similar to those shown in the first embodiment will be omitted, and descriptions will be focused on components that differ from them. In the following other embodiments, any structure that can be adopted among the components shown in the first embodiment or other embodiments may be selectively applied, and thus detailed descriptions or drawings thereof will be omitted.

Fig. 5 is a schematic diagram showing a composite heat dissipation system for controlling the thermal environment of a greenhouse according to a second embodiment of the present invention, and Fig. 6 is an enlarged view of part B of Fig. 5, wherein the greenhouse (1), hot water supply source (2), cold water supply source (3), heat exchange line section (4), water supply line (5), water recovery line (6), control valve (7), and pump (8) are the same as or similar to those of the first embodiment described above, and thus a detailed description thereof will be omitted.

Referring to FIG. 5, a composite heat dissipation system for controlling the thermal environment of a greenhouse according to a second embodiment of the present invention comprises, similarly to the first embodiment described above, a greenhouse (1), a hot water supply source (2), a cold water supply source (3), a heat exchange line section (4), a water supply line (5), a water recovery line (6), a control valve (7), and a pump (8), but further comprises an upper plant cultivation section (not shown) formed above a plant cultivation section (14), and an upper heat exchange line section (4'), a water distribution supply line (5'), a water recovery collection line (6'), and an upper control valve (7') for supplying hot or cold water to the upper plant cultivation section.

In the first embodiment described above, the upper plant cultivation section (not shown) is formed as a single-layer structure, but in the second embodiment, it is formed as one or more layers in the height direction of the greenhouse, which is the upper layer of the plant cultivation section (14), so that plants can be cultivated in multiple layers.

The upper plant cultivation section is not specifically illustrated in the drawing, but is configured to have multiple rows, similar to the plant cultivation section (14). For example, the upper plant cultivation section (not illustrated) may be configured as a substrate frame (not illustrated) on which a substrate (not illustrated) on which plants are planted is placed.

In the case of the second embodiment, the badge frame (not shown) is configured so that the badge can be installed in a three-layer structure, as two upper heat exchange line sections (4') are further configured on top of the heat exchange line section (4), which is the basic layer, as shown in FIG. 5.

The upper heat exchange line section (4') is arranged in each layer of the upper plant cultivation section, and is equipped with a heat dissipation pipe (41), a first distribution header (42), a second distribution header (43), a variable heat dissipation member (45), etc. having the same structure as the heat exchange line section (4) of the first embodiment described above.

The water distribution supply line (5') is a pipe that is connected between the first distribution header (42) and the second distribution head (43) of the upper heat exchange line section (4') and the water supply line (5), and performs the function of supplying and distributing hot or cold water to flow to the heat dissipation pipe of the upper heat exchange line section (4').

Preferably, the water distribution supply line (5') has a first water distribution supply line (55) connected to the first water supply line (51) and the first distribution header (42) of each upper heat exchange line section (4') of the two layers, and a second water distribution supply line (56) connected to the second water supply line (52) and the second distribution header (43) of each upper heat exchange line section of the two layers.

The water recovery collection line (6') is a pipe that is connected between the second distribution header (43) and the first distribution head (42) of the upper heat exchange line section (4') and the water recovery line (6), and performs the function of recovering hot or cold water so that it is supplied to the heat dissipation pipe of the upper heat exchange line section (4') and returns after performing a heat dissipation process.

The water recovery collection line (6') is provided with a first water recovery line (65) connected to the first water recovery line (61) and the second distribution header (43) of each upper heat exchange line section (4') of the two layers, and a second water recovery collection line (66) connected to the second water recovery line (62) and the first distribution header (42) of each upper heat exchange line section of the two layers.

The upper control valve (7') is a valve installed at the connection point of the water distribution supply line (5'), the recovery water collection line (6'), the first distribution header (42) and the second distribution head (43) of the upper heat exchange line section so that a closed loop of circulation of hot water or a closed loop of circulation of cold water is formed.

The upper control valve (7') is provided with a fifth control valve (75) installed at a connection point between the first water distribution supply line (55) and the first distribution header (42) of each upper heat exchange line section (4'), a sixth control valve (76) installed at a connection point between the second water distribution supply line (56) and the second distribution header (43) of each upper heat exchange line section (4'), a seventh control valve (77) installed at a connection point between the first recovery water collection line (65) and the second distribution header (43) of each upper heat exchange line section (4'), and an eighth control valve (78) installed at a connection point between the second recovery water collection line (66) and the first distribution header (42) of each upper heat exchange line section (4').

Meanwhile, the operation of the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the second embodiment of the present invention is similar to that of the first embodiment described above, so the differences will be briefly described with a focus on the parts.

Referring to FIG. 5, the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the second embodiment of the present invention opens the first control valve (71) and the fifth control valve (75) to enable the supply of hot water under the control of a control unit (not shown) when the heating supply mode is performed, opens the third control valve (73) and the seventh control valve (77) to enable the recovery of hot water, and closes the second control valve (72) and the sixth control valve (76) and the fourth control valve (74) and the eighth control valve (78) to prevent backflow. When the first pump (81) and the third pump (83) are operated, the hot water of the heat storage tank (22) is supplied to the heat exchange line section (4) and the first distribution header (42) of each upper heat exchange line section (4') through the first water supply line (51), and then distributed and supplied to a plurality of heat dissipation pipes (41).

The hot water supplied through the heat dissipation pipe (41) releases heat to raise the temperature of the plant cultivation section (14) and the upper plant cultivation section (not shown), and the hot water of the plurality of heat dissipation pipes (41) passing through the plant cultivation section is collected in the second distribution head (43), flows along the first recovery collection line (65) and the first water recovery line (61), and is then recovered in the storage tank (22).

Meanwhile, in the cooling supply mode of the composite heat dissipation system for controlling the thermal environment of a greenhouse according to the second embodiment of the present invention, the second control valve (72), the sixth control valve (76), the fourth control valve (74), and the eighth control valve (78) are opened under the control of a control unit (not shown), and the first and third control valves (71, 73), the fifth control valve (75), and the seventh control valve (77) are closed, and the second pump (82) and the fourth pump (84) are operated, so that the cold water of the cold storage tank (32) is supplied to the second distribution header (43) through the second water supply line (52) and the second recovery water collection line (66), and then distributed and supplied to a plurality of heat dissipation pipes (41).

The cold water supplied through the heat dissipation pipe (41) releases cold air to lower the temperature of the plant cultivation section (14) and the upper plant cultivation section (not shown), and is collected from the first distribution head (42), flows along the second recovery collection line (66) and the second water recovery line (62), and is then recovered to the cold storage tank (32).

The terms "include," "comprise," or "have" described above, unless otherwise specifically stated, imply that the corresponding component may be present, and therefore should be interpreted to include other components rather than excluding them. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as terms defined in dictionaries, should be interpreted to be consistent with the contextual meaning of the relevant technology, and shall not be interpreted in an ideal or overly formal sense, unless explicitly defined herein.

Although the configuration and operation of a composite heat dissipation system for controlling the thermal environment of a greenhouse according to one embodiment of the present invention described above has been described, this is exemplary, and it will be understood by those skilled in the art that some of the above-described embodiments can be substituted and modified without departing from the technical spirit of the present invention.

Therefore, it should be understood that the scope of protection of the present invention extends to the invention described in the patent claims and equivalents thereof.

1: Greenhouse 14: Plant cultivation department
2: Hot water supply source 22: Heat storage tank
3: Cold water supply source 32: Cold storage tank
4: Heat exchange line section 4': Upper heat exchange line section
41: Heat dissipation pipe 415: Heat absorption part
416: Hydrophobic coating layer 417: Photocatalytic layer
42: First distribution head 43: Second distribution head
45: Variable heat dissipation member 5: Water supply line
5': Upper distribution supply line 51: First water supply line
52: Second water supply line 55: First water distribution supply line
56: Second water distribution supply line 6: Water recovery line
6': Water recovery line 61: 1st water recovery line
62: Second water recovery line 65: First water recovery collection line
66: Second recovery water collection line 7: Control valve
7': Upper control valve 71: First control valve
72: Second control valve 73: Third control valve
74: 4th control valve 75: 5th control valve
76: 6th control valve 77: 7th control valve
78: 8th control valve 8: Pump
81: Pump 1 82: Pump 2
83: 3rd pump 84: 4th pump

Claims (10)

In a composite heat dissipation system for controlling the thermal environment of a greenhouse,
A greenhouse formed to receive sunlight; a heat exchange line section having a plurality of heat dissipation pipes arranged in a plant cultivation section inside the greenhouse and connected to a hot water supply source and a cold water supply source and arranged in the longitudinal direction of the plant cultivation section, a first distribution head connected to one end of the plurality of heat dissipation pipes, and a second distribution head connected to the other end of the plurality of heat dissipation pipes; a water supply line having one end connected to the hot water supply source or the cold water supply source and the other end connected to the first distribution head or the second distribution head to supply hot or cold water to the heat dissipation pipes; a water recovery line having one end connected to the second distribution head or the first distribution head and the other end connected to the hot water supply source or the cold water supply source so that the hot or cold water passing through the heat dissipation pipes is recovered; a control valve installed in the water supply line and the water recovery line so that a hot water circulation closed loop or a cold water circulation closed loop is formed; and a pump for pumping hot water supplied through the hot water supply source or cold water supplied through the cold water supply source;
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that the heat dissipation pipe has a heat absorption portion composed of a black body coating portion laminated on the heat dissipation pipe to absorb radiant energy inside the greenhouse, and a photocatalytic layer for generating carbon dioxide along with an antibacterial effect is formed on the black body coating portion when light is applied.
In the first paragraph,
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that the heat exchange line section further includes a variable heat dissipation member that is movably installed in the heat dissipation pipe to increase the heat dissipation surface area of a specific area.
In the second paragraph,
The above heat dissipation pipe is structured such that a heat dissipation part formed as a male screw thread protrudes from the outer surface of the pipe.
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that the variable heat dissipation member is composed of a heat dissipation body having a female screw portion that moves by being screwed into the male screw thread of the heat dissipation pipe.
delete delete In the first paragraph,
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that a hydrophobic coating layer is laminated on the black body coating portion.
delete In the first paragraph,
The above hot water supply source is equipped with a storage tank,
The above cold water supply source is equipped with a cold storage tank,
The above water supply line comprises a first water supply line connected to one side of the storage tank and the first distribution header, and a second water supply line connected to one side of the cold storage tank and the second distribution header.
The above water recovery line comprises a first water recovery line connected to the other side of the second distribution header and the storage tank, and a second water recovery line connected to the other side of the first distribution header and the storage tank.
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that the control valve and the pump are installed in the first and second water supply lines and the first and second water recovery lines, respectively.
In paragraph 8,
An upper plant cultivation section is provided which is formed in one or more layers in the height direction of the greenhouse, which is the upper part of the plant cultivation section.
An upper heat exchange line section arranged in the upper plant cultivation section and composed of a heat dissipation pipe having the same structure as the heat exchange line section, a first distribution header, and a second distribution header;
A water distribution supply line connected between the first distribution header of the upper heat exchange line section and the water supply line, and between the second distribution head and the water supply line;
A water recovery collection line connected between the second distribution header of the upper heat exchange line section and the water recovery line, and between the first distribution head and the water recovery line; and
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized by comprising: an upper control valve installed at a connection point between the water distribution supply line and the recovery collection line, and the first distribution header and the second distribution head of the upper heat exchange line section.
In paragraph 9,
The above water distribution supply line comprises a first water distribution supply line connected to the first water supply line and the first distribution header of the upper heat exchange line section, and a second water distribution supply line connected to the second water supply line and the second distribution header of the upper heat exchange line section.
A composite heat dissipation system for controlling the thermal environment of a greenhouse, characterized in that the above-mentioned recovery water collection line comprises a first recovery water collection line connected to the first water recovery line and the second distribution header of the upper heat exchange line section, and a second recovery water collection line connected to the second water recovery line and the first distribution header of the upper heat exchange line section.