Solar absorber and greenhouse system using same

Abstract

The present invention relates to a solar absorber and a greenhouse system using same and, more specifically, to a solar absorber and a greenhouse system using same, the absorber absorbing solar radiant energy so that energy can be saved during cooling, and recycling the absorbed thermal energy to perform heating so that energy costs can be saved and greenhouse management efficiency can be improved. The solar absorber provided in a cultivation space, according to the present invention, comprises: a heat absorber for absorbing radiant energy of the cultivation space; a heat absorber accommodation part in which the heat absorber is embedded; and a cooling means for supplying a cooling medium to the heat absorber accommodation part in order to cool the heat absorber and the heat absorber accommodation part.

Description

Solar heat absorption device and greenhouse system using the same

[0001] The present invention relates to a solar heat absorber and a greenhouse system using the same, and more particularly, to a solar heat absorber and a greenhouse system using the same, which can save energy during cooling by absorbing solar radiant energy and can reduce energy costs and improve the efficiency of greenhouse management by recycling the absorbed heat energy.

[0002] In general, facility horticulture is a facility that plants crops in cultivation areas set up inside a greenhouse and manages the environment to maintain ideal conditions for crop cultivation, such as temperature, humidity, and CO2, while carrying out the cultivation process. Glass greenhouses and vinyl houses are mainly used.

[0003] Glass greenhouses and vinyl greenhouses are equipped with heating and cooling systems to control the internal temperature. These greenhouse heating and cooling systems require electric or engine-powered heat pumps, fan coil blowers, and energy to cool or heat the heat medium in the heat medium storage tanks used by the fan coils and heat pumps, resulting in high operating costs.

[0004] In addition, the greenhouse is suitable for crop growth due to the solar radiation energy entering the greenhouse when the amount of solar radiation is high (mainly during the daytime) in controlling the thermal environment (usually 28 o There is a disadvantage in that it causes the internal temperature of the greenhouse to rise beyond C. Here, solar radiation energy is composed of ultraviolet rays (10 to 300 nm), visible light (350 to 700 nm), and infrared rays (750 to 2500 nm), but the greenhouse outer skin transmits visible light and infrared rays of sunlight with high energy intensity, but does not transmit most of the long-wavelength radiation energy of 3000 nm or more generated from objects inside the greenhouse at room temperature, thereby causing the greenhouse effect by increasing the internal temperature of the greenhouse.

[0005] As mentioned above, an excessively high temperature inside a greenhouse can hinder normal crop growth and cause problems such as burns due to excessive temperature.

[0006] To solve these problems, there are methods of ventilating the heated air in the greenhouse, fogging, and operating existing cooling methods such as heat pumps. However, as the cooling load increases (such as in summer), the production cost of facility horticulture increases due to the increase in energy costs, so agricultural fields often have a fallow period in the summer.

[0007] In addition, when the temperature inside the greenhouse rises excessively and the side and ceiling windows are opened, the CO2 applied to the greenhouse leaks out and is wasted, which not only reduces the fertilization effect but also increases management costs, and there is a disadvantage in that the humidity cannot be accurately controlled.

[0008] Accordingly, in order to compensate for the shortcomings of conventional facility horticulture as described above, a means for appropriate cooling load management is required before solar radiation energy entering the greenhouse is diffused into the greenhouse, and in particular, there is an urgent need for the development of a cooling management method that does not consume electric energy.

[0009]

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 0001) Korean Patent Publication No. 10-2015-0084103 "Hybrid Heating and Cooling System for Greenhouses"

[0013] (Patent Document 0002) Korean Patent Registration No. 10-1707045 "Glass Greenhouse Heating and Cooling System"

[0014] The present invention has been proposed with the above in mind, and its purpose is to provide a solar heat absorption device that can save energy during cooling by absorbing solar radiant energy, and a greenhouse system using the same.

[0015] Another object of the present invention is to provide a solar heat absorption device and a greenhouse system using the same, which can save energy during cooling by absorbing solar radiant energy and can reduce energy costs and improve the efficiency of greenhouse management by recycling the absorbed thermal energy for heating.

[0016] In order to achieve the above object, a solar heat absorption device according to the present invention is characterized by comprising: a heat absorber that absorbs radiant energy of the cultivation space; a heat absorber receiving portion in which the heat absorber is built; and a cooling means configured to supply a cooling medium to the heat absorber receiving portion to cool the heat absorber and the heat absorber receiving portion.

[0017] The above heat absorber may be composed of a plurality of black bodies, and the heat absorber receiving portion may be composed of a receiving case having a black body receiving space in which the plurality of black bodies are received.

[0018] Preferably, the receiving case may be configured to include: a transparent body formed of a transparent material in which the black body receiving space is divided into a plurality of sections by partitions and light can be incident; a screen formed in the transparent body to allow the cooling medium to flow while preventing the black body from escaping; and a plurality of long-wavelength light inlet holes formed in the transparent body to communicate with the black body receiving space.

[0019] The above-mentioned receiving case may further include a leakage prevention tube installed at a downward angle in the long-wavelength light inlet hole.

[0020] Meanwhile, a solar heat absorption device according to the present invention is characterized in that it comprises a heat absorber that absorbs radiant energy of the cultivation space; a heat absorber receiving portion in which the heat absorber is built; a cooling chamber that is installed in contact with the heat absorber receiving portion; and a cooling means configured to supply a cooling medium to the cooling chamber so as to cool the heat absorber and the heat absorber receiving portion.

[0021] The above heat absorber may be composed of a plurality of black bodies, and the heat absorber receiving portion may be composed of a receiving case having a black body receiving space in which the plurality of black bodies are received.

[0022] The above cooling chamber may be configured to include a cooling case having a fluid flow space in which a cooling medium flows.

[0023] At this time, the receiving case may be configured to include a transparent body formed of a transparent material in which the black body receiving space is divided into a plurality of sections by partitions and light can be incident, a screen formed in the transparent body to allow the cooling medium to flow while preventing the black body from escaping, and a plurality of long-wavelength light inlet holes formed in the transparent body to communicate with the black body receiving space.

[0024] The above cooling case can be formed and connected to the receiving case by a transparent material that allows light to enter.

[0025] The above cooling means may be configured to include a cooling water inlet through which cooling water is discharged; a cooling water recovery unit in which the heated cooling water discharged from the cooling water inlet is collected while passing through a cooling point; a cooling water supply line for supplying cooling water to the cooling water inlet; and a cooling water pump for pumping cooling water to the cooling water supply line.

[0026] The above cooling water inlet unit may be configured to include an inlet head connected to the cooling water supply line and a plurality of discharge nozzles formed in the inlet head.

[0027] The above black body may be composed of a molded body including activated carbon.

[0028] In addition, the black body may have a black body coating formed on the surface of a hollow body having thermal conductivity.

[0029] Meanwhile, in order to achieve the above purpose, a greenhouse system using a solar heat absorption device according to the present invention is characterized by including a greenhouse having a cultivation space; and the above-described solar heat absorption device installed in the greenhouse.

[0030] And, a greenhouse system using a solar heat absorption device according to the present invention is characterized by including: a greenhouse having a cultivation space; the aforementioned solar heat absorption device installed in the greenhouse; a heat pump that operates by utilizing the thermal energy of the heated and cooled water; and a heat storage unit that stores the thermal energy of the heated and cooled water.

[0031] The above heat storage unit is composed of a heat storage tank that receives water, and includes a pipe line that is connected for the flow of heated cooling water used for cooling the heat absorber and the heat absorber water receiving unit, and for the flow of water between the heat storage tank and the heat pump.

[0032] The above-mentioned pipeline may include a first water supply line connected to supply heated cooling water from the cooling water recovery unit to the heat pump, a first water recovery line connected to supply water discharged after heat exchange from the heat pump to the cooling chamber, a second water supply line connected to supply heated water from the heat pump toward the heating unit of the heat pump, a second water recovery line connected to recover water used for heating in the heating unit to a heat storage tank, a first branch line branched from the second water supply line and connected to the heat storage tank, a second branch line connected to supply water from the heat storage tank to the heat pump, and a discharge line branched from and connected to the first water recovery line and having discharge controlled by a second discharge control valve installed at a branch point.

[0033] According to the solar heat absorption device and the greenhouse system using the same according to the present invention, among solar radiant energy, radiant energy such as infrared and far-infrared rays with a large wavelength range that increases the temperature inside the greenhouse other than the visible light range used for photosynthesis can be absorbed by the heat absorber and emitted and removed by the cooling means, thereby reducing energy costs for cooling while maintaining the temperature inside the greenhouse at a temperature suitable for plant growth. In addition, by storing the heat energy generated by the solar heat absorption device in the heat storage unit and recycling the absorbed heat energy to perform heating when heating is required, energy costs can be reduced and the efficiency of greenhouse management can be improved.

[0034] According to the solar heat absorption device of the present invention and the greenhouse system using the same, the opening of the side windows and the ceiling windows can be minimized to release the radiant energy of the greenhouse, so that the temperature control and humidity control for heating and cooling inside the greenhouse can be effectively performed. In addition, the leakage of fertilized CO2 to the outside due to the opening of the side windows and the ceiling windows can be prevented, so that the fertilization effect can be maintained, and management costs can be reduced by reducing CO2 waste, and the inflow of pathogens contained in the outside air can be prevented, and the decline in productivity and quality that may occur due to poor crop growth caused by the sudden inflow of cold air in the winter can be prevented.

[0035] Figure 1 is a schematic diagram showing a solar heat absorption device and a greenhouse system using the same according to the first embodiment of the present invention.

[0036] Figure 2 is a schematic cross-sectional view showing a solar heat absorption device according to the first embodiment of the present invention;

[0037] Figure 3 is a schematic diagram showing a first modified example of a heat absorber receiving portion of a solar heat absorber according to the first embodiment of the present invention.

[0038] Figure 4 is a schematic diagram showing a second modified example of the heat absorber receiving portion of the solar heat absorber according to the first embodiment of the present invention.

[0039] Figure 5 is a simplified diagram showing a solar heat absorption device according to a second embodiment of the present invention.

[0040] Figure 6 is a simplified diagram showing a greenhouse system using a solar heat absorption device according to a second embodiment of the present invention.

[0041] 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 in the drawings.

[0042] 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 solar heat absorption device and a greenhouse system utilizing the same, the relevant parts will be primarily illustrated and described, and the description of the remaining parts will be simplified or omitted.

[0043] Figure 1 is a schematic diagram showing a solar heat absorption device and a greenhouse system using the same according to a first embodiment of the present invention, and Figure 2 is a schematic cross-sectional diagram showing a solar heat absorption device according to a first embodiment of the present invention.

[0044] Referring to FIGS. 1 and 2, a solar heat absorption device (A) according to a first embodiment of the present invention is equipped with a heat absorber receiving portion (1), a heat absorber (2), and a cooling means (3), and is characterized in that it is installed in a greenhouse (100) configured to have a cultivation space provided inside, and is configured to reduce the temperature rise inside the greenhouse due to radiant heat by absorbing solar radiant energy, thereby saving energy during cooling.

[0045] The heat absorber receiving portion (1) is a component in which a heat absorber (2) is built in, and is composed of a receiving case (1a) having a black body receiving space (15) in which a plurality of heat absorbers are received.

[0046] The receiving case (1a) has no particular restrictions on its shape as long as it is easy to absorb radiant energy, but considering that it is installed on the side wall of the greenhouse, it is formed in a hexahedral shape with a relatively thin plate.

[0047] For example, the receiving case (1a) is composed of a transparent body (11) formed in a plate-shaped hexahedron by a transparent material that allows light to enter, and a screen (12) formed on the lower part of the transparent body to allow the flow of a cooling medium such as coolant while preventing the heat absorber from being detached.

[0048] The transparent body (11) is connected by a narrow peripheral plate so that the front and rear plates are plate-shaped and have a black body receiving space (15) inside, and an inlet for cooling water is provided at the top.

[0049] Here, the receiving case (1a) has no particular restrictions on the material as long as it is a transparent material that allows light to enter, but in this embodiment, it is formed of transparent polycarbonate (PC).

[0050] In addition, it is preferable that the transparent body (11) of the receiving case (1a) be divided into a plurality of black body receiving spaces by a plurality of partition walls (not shown) installed longitudinally along the length of the greenhouse. When the partition walls are installed in this manner, a certain quantity of heat absorbers (2) are divided and received in each black body receiving space provided between the partition walls, so that if the flow path of the cooling water is maintained constant, there is an advantage in that heat exchange is performed evenly.

[0051] The heat absorber (2) is a component that absorbs radiant energy in the cultivation space. It can be selected and applied without any special restrictions as long as it can absorb radiant energy inside the greenhouse and can be inserted into the inside of the heat absorber receiving section (1) described later. However, it is preferable that it be composed of a plurality of black bodies (21).

[0052] The above black body (21) refers to an object whose solar radiation energy absorption rate is theoretically 1, and can effectively absorb solar radiation energy and mitigate the diffusion of solar radiation energy to the surroundings. By quickly dissipating heat outside the greenhouse through the heat highway function that absorbs part of the solar radiation energy flowing into the greenhouse at the side wall of the greenhouse, it can have the effect of mitigating the temperature rise inside the greenhouse.

[0053] For example, the black body (21) is composed of a molded body containing activated carbon. Here, the molded body may be composed by molding only activated carbon into a sphere, or may be composed by mixing resin with activated carbon and molding it into a sphere.

[0054] In addition, the blackbody (21) can be configured with a structure in which a blackbody coating portion is formed on the surface of a hollow body having thermal conductivity for more effective heat exchange. Here, the hollow body is preferably configured with a metal hollow ball having high thermal conductivity, such as aluminum, and the blackbody coating portion can be configured by painting a known blackbody paint having high emissivity, heat resistance, wear resistance, and chemical resistance on the hollow body.

[0055] And, since the black body (21) is easily damaged when it comes into direct contact with cooling water when a molded body is manufactured by molding only activated carbon, in the present embodiment, it is preferable to apply a molded body formed into a sphere by mixing resin into activated carbon and a molded body with a black body coating formed on the surface of the hollow body.

[0056] The cooling means (3) is a component configured to supply a cooling medium to the heat absorber receiving portion (1) and to cool the heat absorber (2), and includes a cooling water inlet portion (31), a cooling water recovery portion (32), a cooling water supply line (33), and a cooling water pump (34).

[0057] The cooling water inlet (31) is configured to allow cooling water to flow in and out, and includes an inlet head (311) connected to a cooling water supply line (33), a plurality of discharge nozzles (312) formed along the length of the greenhouse on the inlet head (311), and a connection nozzle (313) formed on the inlet head (311) and connected to a cooling water supply line (33) that supplies cooling water.

[0058] The cooling water recovery unit (32) is a section where the cooling water discharged from the cooling water inlet unit (32) passes through the inside of the receiving case (1a), which is a cooling point, and then is discharged. The heated cooling water formed through heat exchange with the radiant energy possessed by the black body is collected and remains there for a while.

[0059] And the coolant recovery unit (32) has no special restrictions on its shape, but is configured in the form of a gutter (321) installed at the bottom of the receiving case (1a).

[0060] The coolant recovery unit (32) has a case connection unit (322) formed on the upper part of the groove so that the lower part of the receiving case (1a) is connected to the upper part, and a drain nozzle (323) formed on the groove so that the coolant drain line is connected.

[0061] The cooling water supply line (33) is a pipe that supplies cooling water to the cooling water inlet (31) and is connected to the cooling water supply source.

[0062] Here, the water supply source is preferably configured as a cooling water storage tank (4) in which agricultural water is stored as shown in Fig. 1, but may be configured in various ways, such as being directly connected to a water supply line or an agricultural water line.

[0063] The cooling water pump (34) is configured as a pump for pumping cooling water to the cooling water supply line (33).

[0064] The attached drawing, Figure 3, is a schematic diagram showing a first modified example of a heat absorber receiving portion of a solar heat absorption device according to the first embodiment of the present invention.

[0065] Referring to FIG. 3, the heat absorber receiving portion (1) is composed of a transparent body (11) formed of a transparent material that allows light to enter the black body receiving space (15), and a receiving case (1b) equipped with a screen (12) formed on the transparent body to allow the flow of a cooling medium while preventing the black body from escaping, and further includes a plurality of long-wavelength light inlet holes (14) that are perforated in the transparent body (11) to communicate with the black body receiving space (15).

[0066] The long wavelength ray inlet hole (14) is provided to allow long wavelength radiant energy among solar radiant energy that cannot be transmitted to the outside to enter the interior of the receiving case (1b), be absorbed by the black body, and then be removed. More specifically, compared to ultraviolet rays, visible light, and infrared rays (750 to 2500 nm), long wavelength radiant energy of 3000 nm or more generated from objects inside a greenhouse at room temperature cannot penetrate the outer covering of the greenhouse, such as vinyl, and remains on objects inside the greenhouse, which further increases the temperature inside the greenhouse, and is thus provided to remove this.

[0067] In addition, the long-wavelength ray inlet hole (14) has a hole shape, and can be formed in various shapes without any special restrictions as long as it has a size and shape that effectively allows the inflow of radiant energy in the long-wavelength band without the black body being ejected to the outside.

[0068] The heat absorber receiving portion (1) as in the first modified example described above has a number of long-wavelength light inlet holes (14) perforated in the receiving case, so that radiant energy in the long-wavelength band is introduced, absorbed by the black body, and then removed by the cooling water, thereby preventing excessive overheating of the greenhouse in advance.

[0069] The attached drawing, Fig. 4, is a schematic diagram showing a second modified example of a heat absorber receiving portion of a solar heat absorption device according to the first embodiment of the present invention.

[0070] Referring to FIG. 4, the heat absorber receiving unit (1) is composed of a transparent body (11) in which a black body receiving space (15) is formed of a transparent material that allows light to enter, a screen (12) formed in the transparent body to allow the flow of a cooling medium while preventing the black body from escaping, and a receiving case (1c) provided with a plurality of long-wavelength light inlet holes (14) that are perforated in the transparent body (11) to communicate with the black body receiving space (15), and further includes a leakage prevention pipe (16) installed at a downward angle in the long-wavelength light inlet holes (14).

[0071] The leakage prevention pipe (16) is formed in the form of a hollow pipe with a relatively small diameter, and is inserted obliquely into the long-wavelength light inlet hole (14) so ​​that a portion is located inside the hollow body and the remaining portion is located outside the hollow body.

[0072] The heat absorber receiving unit (1) as in the second modified example described above can prevent excessive overheating of the greenhouse in advance by allowing long-wavelength radiant energy to flow in through the hollow hole of the leakage prevention tube (16) inserted into the long-wavelength light inlet hole (14), be absorbed by the black body, and then be removed through heat exchange with the cooling water. In this way, when the leakage prevention tube (16) is inclined, the falling cooling water does not flow out of the receiving case (1c), so that the radiant energy can be stably absorbed and removed while maintaining a clean state.

[0073] Meanwhile, the solar heat absorption device (A) according to the first embodiment of the present invention described above can be installed in a greenhouse with a cultivation space as shown in Fig. 1 to configure a greenhouse system using the solar heat absorption device.

[0074] When installed in a greenhouse, the solar heat absorber (A) is installed along the length of the side wall of the greenhouse to minimize the problem of it acting as an obstacle to photosynthesis of plants.

[0075] The operation of a greenhouse system using a solar absorber configured as described above is briefly described.

[0076] When sunlight enters, the interior of the greenhouse (100) is heated by solar radiation energy, and the solar radiation energy at this time is usually 800 to 1000 W / m 2 In the case of summer (or spring / autumn, winter daytime), it is common to raise the temperature inside the greenhouse to 28℃ or higher, which is a temperature condition suitable for crop growth. However, according to this embodiment, the heat absorber (2) absorbs radiant energy and the heat is exchanged and released by cooling water flowing through the cooling means (3), so that an appropriate auxiliary cooling effect is performed before the solar radiant energy is diffused inside the greenhouse.

[0077] To explain more specifically, when the pumping action is performed by the operation of the cooling water pump (34), the cooling water is supplied from the cooling water storage tank (4) to the inlet head (311) connected to the cooling water supply line (33) and is then ejected into the interior of the receiving case (1a) through a plurality of discharge nozzles (312) formed in the inlet head (311) and flows downward.

[0078] In this way, the cooling water flowing into the receiving case (1a) moves downward and absorbs radiant energy, and comes into contact with the outer surface of the heated black body, thereby performing a heat exchange action and removing radiant energy.

[0079] This action removes radiation energy with a large wavelength, such as infrared and far-infrared rays, that raise the temperature inside the greenhouse, other than the visible light range used for photosynthesis among solar radiation energy, thereby lowering the temperature inside the greenhouse, thereby saving energy for cooling in the summer.

[0080] 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.

[0081] Figure 5 is a schematic diagram showing a solar heat absorption device according to a second embodiment of the present invention.

[0082] Referring to FIG. 2, a solar heat absorption device (A') according to a second embodiment of the present invention includes a heat absorber receiving portion (1) of a cultivation space, a heat absorber (2) built into the heat absorber receiving portion (1) and absorbing radiant energy, a cooling chamber (5) installed in contact with the heat absorber receiving portion (1), and a cooling means (3) configured to supply a cooling medium to the cooling chamber (5) to cool the heat absorber and the heat absorber receiving portion.

[0083] The above heat absorber receiving portion (1) is composed of a receiving case (1d) having a blackbody receiving space in which a plurality of blackbodies are received, and the receiving case (1d) is provided with a transparent body (11) formed of a transparent material that allows light to enter, a screen (12) formed in the transparent body to allow the flow of a cooling medium while preventing the blackbody from escaping, and a plurality of long-wavelength light inlet holes (14) that are perforated in the transparent body to communicate with the blackbody receiving space (15).

[0084] The above cooling chamber (5) is composed of a cooling case (5a) having a fluid flow space (55) in which a cooling fluid such as coolant flows.

[0085] The cooling case (5a) is formed by being connected to the receiving case (1d) using a transparent material that allows light to enter, and the black body receiving space (15) and the fluid flow space (55) are separated into different spaces.

[0086] In this way, since the heat absorber receiving portion (1) in which the black body is received and the cooling chamber (5) in which the cooling water flows are separated from each other, the cooling water and the black body do not come into contact with each other, so even if a molded body made of only activated carbon is applied as the black body (21), damage can be prevented.

[0087] The attached drawing 6 is a simplified diagram showing a greenhouse system using a solar heat absorption device according to the second embodiment of the present invention.

[0088] Referring to FIG. 6, a greenhouse system including a solar heat absorption device according to a second embodiment of the present invention comprises a greenhouse (100) having a cultivation space, a solar heat absorption device (A') installed in the greenhouse, a heat storage unit (6) that stores heat of heated and cooled water, and a heat pump (7) that operates using the heat source of the heated and cooled water.

[0089] The solar heat absorption device can selectively apply the solar heat absorption device (A) according to the first embodiment and its modifications described above and the solar heat absorption device (A') according to the second embodiment. FIG. 6 illustrates an example in which the solar heat absorption device (A') according to the second embodiment is applied.

[0090] The heat storage unit (6) is composed of a heat storage tank (61) that cools the heat absorber (2) by cooling water flowing into the cooling chamber (5) and then stores the heat energy exchanged.

[0091] The heat pump (7) is a component that heats the recovered heat in the heated cooling water while the cooling water passes through the heat absorber receiving unit (1) and transfers it to the heat storage unit (6), or in the case of winter, performs heating of the greenhouse through the heating unit (81), and is equipped with an evaporator (not shown), an expansion valve (not shown), a condenser (not shown), a compressor (not shown), etc., so that the heat energy contained in the heated water evaporates in the evaporator (not shown) and is released from the condenser (not shown). In addition, since the heat pump (7) is a well-known device widely used in the field of heating and cooling, a detailed description is omitted and a simplified illustration is provided. Here, the heating unit (81) can be configured as a device equipped with a radiator that releases heat and a blower.

[0092] A greenhouse system using a solar heat absorption device according to the second embodiment of the present invention is equipped with a piping line (82), a pump (83), a valve (84), etc. to circulate heated cooling water to a heat pump (7) without discharging it, and to store the high temperature water produced by the heat pump in a heat storage unit (6) or to heat it.

[0093] For example, the piping line (82) includes a first water supply line (821) connected to supply heated cooling water from a cooling water recovery unit (32) to a heat pump (7), a first water recovery line (822) connected to supply water that has been heat-exchanged and discharged from the heat pump to a cooling water storage tank (4), a second water supply line (823) connected to supply heated water from the heat pump toward a heating unit (81), a second water recovery line (824) connected to return water used for heating in the heating unit to a storage tank (61), a first branch line (825) branched from the second water supply line and connected to a storage tank, and a second branch line (826) connected to supply water from the storage tank (61) to the heat pump. In addition, a discharge line (829) for discharge is connected in a branched form to the first water recovery line (822).

[0094] The pump (83) is provided with a first pump (831) installed in the first water supply line (821), a second pump (832) installed in the first water recovery line (822), and the valve (84) is provided with a first control valve (841) installed in the second water supply line (823) and a branch section of the first branch line (825). It is preferable that the first control valve (841) be configured as an electric three-way control valve that can automatically perform an opening and closing operation under the control of the control unit.

[0095] Meanwhile, the greenhouse system using the solar heat absorption device according to the second embodiment of the present invention can remove solar radiation energy of the greenhouse by the operation of the heat absorber receiving unit (1), the heat absorber (2), and the cooling means (3) as described above, and at the same time, since the heat storage unit (6) and the heat pump (7) are further provided, the heated cooling water of the cooling water recovery unit (32) can be used as auxiliary energy to operate the heat pump (7) to form high-temperature water, which can then be used for heating the greenhouse, or the high-temperature water generated by the heat pump (7) can be stored in the heat storage unit (6) and circulated to the heating unit (81) of the greenhouse, thereby enabling the stable operation of the heating and cooling system.

[0096] In addition, a first water recovery line (822) is connected between the cooling water storage tank (4) and the heat pump (7), so that the water discharged after being used for heat exchange in the heat pump (7) can be recycled as cooling water without being discharged.

[0097] In addition, a second discharge control valve (829) is installed at a branch point in the first water recovery line (822) to discharge the water when the temperature of the water is not suitable for use as cooling water, and a cooler (not shown) to lower the temperature of the water discharged from the heat pump (7) may be further installed. In addition, the first water supply line (821) is connected to the discharge line (829), and a first discharge control valve (828) is installed at the connection point. Here, it is preferable that the first discharge control valve (828) and the second discharge control valve (829)) are configured as electric three-way control valves.

[0098] According to the greenhouse system using the solar heat absorption device according to the second embodiment of the present invention described above, among the solar radiant energy of the greenhouse, radiant energy such as infrared rays and far-infrared rays with a large wavelength range that increases the temperature inside the greenhouse other than the visible light range used for photosynthesis is absorbed and removed by the solar heat absorption device (A'), thereby lowering the temperature inside the greenhouse, and thus energy for cooling in the summer can be saved.

[0099] In addition, the heated cooling water obtained from the solar heat absorption device (A') can be stored in the heat storage unit (6) and used as heating water, etc. when heating is required, such as at night.

[0100] 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.

[0101] Although the configuration and operation of a solar heat absorption device and a greenhouse system using the same according to one embodiment of the present invention have been described above, 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.

[0102] 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.

[0103] The present invention relates to a solar heat absorption device that can save energy during cooling by absorbing solar radiant energy and perform heating by recycling the absorbed thermal energy, and to a greenhouse system using the same. Although the present invention is configured to be applied primarily to greenhouses, it can be widely applied without special limitations to any facility into which solar radiant energy enters.

Claims

1. In a solar heat absorption device installed in a cultivation space, A heat absorber that absorbs radiant energy from the above cultivation space; A heat absorber receiving portion in which the above heat absorber is built-in; and A solar heat absorption device characterized by comprising a cooling means configured to supply a cooling medium to the heat absorber receiving portion in order to cool the heat absorber and the heat absorber receiving portion.

2. In paragraph 1, The above heat absorber is composed of a plurality of black bodies, A solar heat absorption device characterized in that the heat absorber receiving unit includes a receiving case having a black body receiving space in which the plurality of black bodies are received.

3. In paragraph 2, The above acceptance case is, A transparent body formed of a transparent material that allows light to enter and in which the above black body receiving space is divided into multiple parts by partition walls; A screen formed on the transparent body to allow the flow of the cooling medium while preventing the black body from escaping; and A solar heat absorption device characterized by including a plurality of long-wavelength light inlet holes perforated in the transparent body to communicate with the black body receiving space.

4. In paragraph 3, A solar heat absorption device characterized in that the above-mentioned receiving case includes a leakage prevention tube installed at a downward angle in the above-mentioned long-wavelength light inlet hole.

5. In a solar heat absorption device installed in a cultivation space, A heat absorber that absorbs radiant energy from the above cultivation space; A heat absorber receiving portion in which the above heat absorber is built-in; A cooling chamber installed in contact with the above heat absorber receiving portion; and A solar heat absorption device characterized by comprising a cooling means configured to supply a cooling medium to the cooling chamber to cool the heat absorber and the heat absorber receiving portion.

6. In paragraph 5, The above heat absorber is composed of a plurality of black bodies, The above heat absorber receiving unit includes a receiving case having a black body receiving space in which a plurality of black bodies are received, A solar heat absorption device characterized in that the cooling chamber includes a cooling case having a fluid flow space in which a cooling medium flows.

7. In paragraph 6, The above-mentioned receiving case includes a transparent body formed of a transparent material in which the black body receiving space is divided into a plurality of sections by partitions and light can be incident, a screen formed in the transparent body to allow the cooling medium to flow while preventing the black body from escaping, and a plurality of long-wavelength light inlet holes perforated in the transparent body to communicate with the black body receiving space. A solar heat absorption device characterized in that the cooling case is formed and connected to the receiving case by a transparent material that allows light to enter.

8. In any one of paragraphs 1 to 7, The above cooling means, Coolant inlet through which coolant is discharged; A cooling water recovery unit in which the heated cooling water discharged from the cooling water inlet unit passes through a cooling point and is collected; A cooling water supply line that supplies cooling water to the above cooling water inlet; and A solar heat absorption device characterized by including a cooling water pump for pumping cooling water into the cooling water supply line.

9. In paragraph 8, A solar heat absorption device characterized in that the cooling water inlet section includes an inlet head connected to the cooling water supply line and a plurality of discharge nozzles formed in the inlet head.

10. In paragraph 8, A solar heat absorber characterized in that the black body is composed of a molded body containing activated carbon.

11. In paragraph 8, The above black body is a solar heat absorption device characterized in that a black body coating is formed on the surface of a hollow body having thermal conductivity.

12. Greenhouse with cultivation space; and A greenhouse system using a solar heat absorption device, characterized in that it includes a solar heat absorption device according to any one of claims 1 to 7 installed in the greenhouse.

13. Greenhouse with cultivation space; The solar heat absorption device of clause 8 installed in the above greenhouse; A heat pump that operates by utilizing the thermal energy of the above-mentioned heated cooling water; and A greenhouse system using a solar heat absorption device, characterized in that it includes a heat storage unit that stores the heat energy of the above-mentioned heated cooling water.

14. In paragraph 13, The above storage unit is composed of a storage tank that holds water, Including a piping line connected for the flow of heated cooling water used for cooling the heat absorber and the heat absorber receiving portion, and for the flow of water between the heat storage tank and the heat pump, A greenhouse system using a solar heat absorption device, characterized in that the above-mentioned piping line includes a first water supply line connected so that the heated cooling water of the cooling water recovery unit is supplied to the heat pump, a first water recovery line connected so that the water discharged after heat exchange from the heat pump can be supplied to the cooling chamber, a second water supply line connected so that the heated water of the heat pump is supplied toward the heating unit of the heat pump, a second water recovery line connected so that the water used for heating in the heating unit is recovered to the heat storage tank, a first branch line branched from the second water supply line and connected to the heat storage tank, a second branch line connected to supply the water of the heat storage tank to the heat pump, and a discharge line branched from the first water recovery line and connected so that the discharge is controlled by a second discharge control valve installed at the branch point.

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