Cooling and heating system using heat absorber for greenhouses

Abstract

The present invention relates to a cooling and heating system using a heat absorber for greenhouses, more specifically to a cooling and heating system using a heat absorber for a greenhouses that heats and cools by absorbing radiant energy when cooling is required and recycling the absorbed thermal energy when heating is required, thereby allowing energy costs to be reduced and greenhouses to be more effectively managed. The cooling and heating system using a heat absorber for greenhouses according to the present invention comprises: a greenhouse provided therein with a cultivation space; an energy absorption body installed in the greenhouse and equipped therein with a radiant energy absorption chamber; a heat absorption body, installed in the energy absorption body, for absorbing radiant energy inside the greenhouse; and a heat exchanger for subjecting the radiant energy absorbed by the heat absorption body to heat-exchange.

Description

Greenhouse heating and cooling system using heat absorbers

[0001] The present invention relates to a heating and cooling system for a greenhouse using a heat absorber, and more specifically, to a heating and cooling system for a greenhouse using a heat absorber that can reduce energy costs and improve the efficiency of greenhouse management by absorbing radiant energy when cooling is required and recycling the absorbed heat energy to perform heating when heating is required.

[0002] In general, facility horticulture, which is carried out using glass greenhouses or vinyl houses, is a facility that plants crops in cultivation areas prepared inside the greenhouse and manages the environment to maintain ideal conditions for crop cultivation, such as temperature, humidity, and CO2, while carrying out the cultivation process. Heating and cooling devices are equipped to control the temperature.

[0003] For example, as a heating and cooling device for a greenhouse, a 'glass greenhouse heating and cooling system' disclosed in Republic of Korea Patent Registration No. 10-1707045 has been proposed.

[0004] The above glass greenhouse heating and cooling system is equipped with a heat medium storage tank, a heat pump, a heat medium circulation supply line, an air circulation supply line, an outside air intake line, an exhaust line, an opening / closing valve, a temperature sensor, and a control unit.

[0005] Here, a heat pump is a heating and cooling device that transfers a low-temperature heat source to a high-temperature one or a high-temperature heat source to a low-temperature one by using the heat generation or condensation heat of a refrigerant. Depending on the driving method, it is divided into electric and engine types, but most of them are currently structured to perform both cooling and heating.

[0006] The aforementioned glass greenhouse heating and cooling system can cool the inside of a glass greenhouse by operating the heat pump in a cooling mode in the summer using the heat medium stored in the heat medium storage tank, and can heat the inside of the glass greenhouse by operating the heat pump in a heating mode in the winter. That is, the internal air of the glass greenhouse that is introduced into the inside of the air circulation supply line passes through the heat pump through the air circulation supply line, is cooled and heated, and then circulated back into the inside of the glass greenhouse to perform cooling and heating.

[0007] These conventional glass greenhouse heating and cooling systems require an electric or engine-driven heat pump for heating and cooling, a fan coil blower, and energy to cool or heat the heat medium in the heat medium storage tank that is moved by the operation of the fan coil and heat pump, which leads to an increase in operating costs.

[0008] In particular, greenhouses are important for thermal environment control when the solar radiation energy (800-1000 W / m) entering the greenhouse is high (mainly during the daytime). 2 ) provides temperature conditions suitable for crop growth (usually 28 o There is a disadvantage in that it causes the temperature inside the greenhouse to rise beyond the temperature limit (C or less). Such a thermal environment in which the temperature inside the greenhouse is excessively elevated can hinder normal crop growth and cause problems such as burns due to excessive temperature.

[0009] 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.

[0010] In addition, when the side and ceiling windows are opened due to excessive rise in the temperature inside the greenhouse, 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.

[0011] In addition, in order to compensate for the shortcomings of conventional facility horticulture as mentioned 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.

[0012] [Prior Art Literature]

[0013] [Patent Document]

[0014] (Patent Document 1) Korean Patent Registration No. 10-1707045 "Glass Greenhouse Cooling and Heating System"

[0015] (Patent Document 2) Korean Patent Registration No. 10-1347523, "Greenhouse Cooling and Heating System and Cooling and Heating Method Thereof."

[0016] (Patent Document 3) Korean Patent Publication No. 10-2015-0084103, "Hybrid Heating and Cooling System for Greenhouses"

[0017] The present invention has been proposed with the above in mind, and its purpose is to provide a heating and cooling system for a greenhouse using a heat absorber that can reduce energy costs and improve the efficiency of greenhouse management by absorbing radiant energy when cooling is required and recycling the absorbed heat energy to perform heating when heating is required.

[0018] Another object of the present invention is to provide a heating and cooling system for a greenhouse using a heat absorber that can effectively perform temperature control and humidity control for heating and cooling inside a greenhouse while minimizing the opening of side and ceiling windows, and can reduce waste due to CO2 fertilized in the greenhouse leaking out to the outside.

[0019] In order to achieve the above object, a heating and cooling system for a greenhouse using a heat absorber according to the present invention is characterized by including: a greenhouse having a cultivation space provided therein; an energy absorption enclosure installed in the greenhouse and having a radiant energy absorption room provided therein; a heat absorber installed in the energy absorption enclosure to absorb radiant energy inside the greenhouse; and a heat exchange unit for heat-exchanging radiant energy absorbed by the heat absorber.

[0020] A heating and cooling system for a greenhouse using a heat absorber according to the present invention further comprises a heat exchange tank disposed in contact with the energy absorption housing and containing water heated by the heat exchange action of the heat exchange unit; and a heat storage unit storing the heat exchanged by the heat exchange unit, wherein the heat storage unit is connected to the heat exchange tank so that the water is stored, and may be configured to include a gutter-type spray heat storage tank installed at least in one or more locations among the above-ground portion of the greenhouse, the underground portion of the greenhouse, and the exterior of the greenhouse.

[0021] Meanwhile, in order to achieve the above object, a heating and cooling system for a greenhouse using a heat absorber according to the present invention is characterized by including: a greenhouse having a cultivation space provided therein; an energy absorption enclosure installed in the greenhouse and having a radiant energy absorption room provided therein; a heat absorber installed in the energy absorption enclosure to absorb radiant energy inside the greenhouse; a heat exchange unit for heat-exchanging radiant energy absorbed by the heat absorber; a heat storage unit for storing heat exchanged by the heat exchange unit; and a heat pump operated using a heat source transferred from at least one of the heat storage unit and the heat exchange unit.

[0022] A heating and cooling system for a greenhouse using a heat absorber according to the present invention may further include a heat exchange tank that is placed in contact with the energy absorption container and receives water heated by the heat exchange action of the heat exchange unit.

[0023] Preferably, the heat exchange unit may be configured as a vibrating heat pipe having one side connected to the heat absorber and the other side immersed in the heat exchange tank, and transferring the heat of the heat absorber to the water of the heat exchange tank by evaporation and condensation of the working fluid without external power.

[0024] Here, the heat storage unit may be configured as a heat storage tank in which water is stored.

[0025] And, the heating and cooling system of a greenhouse using a heat absorber according to the present invention may include a piping line having a first water supply line connected to supply heated water of the heat exchange tank to the heat pump, a first water recovery line connected to recover water of the heat pump to the heat exchange tank, a second water supply line connected to supply heated water of the heat pump toward the heating section of the heat pump, a second water recovery line connected to recover water used for heating in the heating section 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 of the heat storage tank to the heat pump, a third branch line branched from the first water supply line and connected to the heat storage tank and supplied with heated water, a fourth branch line branched from the first water recovery line and connected to the heat storage tank and recovered water, and a discharge line extending from the third branch line and provided with heated water. there is.

[0026] In addition, a greenhouse heating and cooling system using a heat absorber according to the present invention may be configured to include a valve including a first control valve installed in a branch portion of the second water supply line and the first branch line, a second control valve installed in a branch portion of the first water supply line and the third branch line, a third control valve installed in a branch portion of the first water recovery line and the fourth branch line, and a fourth control valve installed in a branch portion of the third branch line and the discharge line; and a pump including a first pump installed in the first water supply line and a second pump installed in the first water recovery line.

[0027] Meanwhile, the heat absorber may be composed of a black body or a solar panel.

[0028] Preferably, the black body may be configured to include a thermally conductive base plate having thermal conductivity; and a black body coating portion laminated on the thermally conductive base plate.

[0029] The energy absorption container may be configured to include a transparent hexahedron formed as a plate-shaped hexahedron and installed on a side wall portion of the greenhouse, the transparent hexahedron formed of a transparent material to allow light to enter and having a heat exchanger inlet portion perforated; a black body fixing portion formed on the transparent hexahedron to fix the thermally conductive base plate; a first connecting portion formed on the transparent hexahedron to be connected to the heat exchange tank; and a heat exchanger fixing portion connected to fix the heat exchanger.

[0030] The heat exchange tank section may be configured to include a tank body disposed at the lower portion of the transparent hexahedron and containing water therein; a second connecting portion formed at the upper portion of the tank body and connected to the first connecting portion; an exhaust nozzle formed at the tank body and discharging water therein; and an inlet nozzle formed at the tank body and recovering water therein.

[0031] According to the greenhouse heating and cooling system using a heat absorber according to the present invention, among solar radiant energy, 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 are absorbed by the organic action of the heat absorber, the heat exchange unit, and the heat exchange tank when cooling is required, and when heating is required, the absorbed heat energy is recycled to perform heating, thereby reducing energy costs and improving the efficiency of greenhouse management.

[0032] According to the greenhouse heating and cooling system using a heat absorber according to the present invention, the temperature control and humidity control for heating and cooling inside the greenhouse can be effectively performed while minimizing the opening of the side windows and the ceiling windows, thereby preventing the leakage of fertilized CO2 to the outside due to the opening of the side windows and the ceiling windows, thereby maintaining the fertilization effect, reducing CO2 waste and thus reducing management costs, and preventing pests and diseases by blocking the inflow of pathogens contained in the outside air, and preventing a decline in productivity and quality that may occur due to poor growth of crops caused by the sudden inflow of cold air in the winter.

[0033] Figure 1 is a schematic diagram for explaining a heating and cooling system for a greenhouse using a heat absorber according to the first embodiment of the present invention.

[0034] Figure 2 is a cross-sectional view of part A of Figure 1 for explaining the main configuration of a greenhouse heating and cooling system using a heat absorber according to the first embodiment of the present invention.

[0035] Figure 3 is a schematic diagram for explaining a heating and cooling system of a greenhouse using a heat absorber according to the second embodiment of the present invention.

[0036] Figure 4 is a schematic diagram for explaining a modified example of a greenhouse heating and cooling system using a heat absorber according to a second embodiment of the present invention.

[0037] 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.

[0038] 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 greenhouse heating and cooling system utilizing a heat absorber, the relevant parts will be primarily illustrated and described, and the description of the remaining parts will be simplified or omitted.

[0039] Fig. 1 is a schematic diagram illustrating a heating and cooling system for a greenhouse using a heat absorber according to a first embodiment of the present invention, and illustrates major components in a simplified manner to aid understanding. Fig. 2 is a cross-sectional view of part A of Fig. 1 for explaining the major components of a heating and cooling system for a greenhouse using a heat absorber according to a first embodiment of the present invention, and is a simplified cross-sectional view of one form of an energy absorption box (2), a heat absorber (3), a heat exchange unit (4), and a heat exchange tank unit (5).

[0040] Referring to FIGS. 1 and 2, a heating and cooling system for a greenhouse using a heat absorber according to a first embodiment of the present invention is configured to absorb radiant energy when cooling is required and perform heating by recycling the absorbed heat energy when heating is required, and comprises a greenhouse (1), an energy absorption box (2), a heat absorber (3), a heat exchange unit (4), and a heat exchange tank unit (5).

[0041] There are no particular restrictions on the structure or form 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.

[0042] The energy absorption housing (2) is a component installed in a greenhouse (1) and having a radiation energy absorption room (25) provided inside, and includes a transparent hexahedron (21), a black body fixing member (22), a first connecting member (23), and a heat exchange fixing member (24).

[0043] The transparent hexahedron (21) is installed on the side wall of the greenhouse and is formed as a plate-shaped hexahedron with a thin thickness compared to its height so that a radiation energy absorption room (25) is formed inside.

[0044] The transparent hexahedron (21) is formed of a transparent material to allow light to enter, and has a heat exchanger inlet (26) perforated on the bottom surface for installing a heat exchanger. Here, it is preferable to select a transparent material such as polycarbonate (PC) or acrylic that has high light transmittance but low thermal conductivity.

[0045] The black body fixing member (22) is formed on a transparent hexahedron (21) to fix the black body (21) described later, and includes a pair of upper fixing protrusions (221) that are spaced apart and protrude so as to have fitting holes on the inner surface of the upper plate of the transparent hexahedron, and a pair of lower fixing protrusions (222) that are spaced apart and protrude so as to have fitting holes on the inner surface of the lower plate of the transparent hexahedron (21).

[0046] The first connecting portion (23) is horizontally protruded from the bottom of the transparent hexahedron (21) so as to be connected to the heat exchange tank portion (5), and a fastening hole is perforated therein.

[0047] The heat exchange fixing member (24) has no particular limitations on shape or structure as long as it can stably fix the heat exchanger (4) to the transparent hexahedron (21), but in this embodiment, it is composed of a fastening member commonly called a U-bolt in which a nut (242) is fastened to a bolt body (241) formed in a roughly 'U' shape.

[0048] Meanwhile, the heat absorber (3) is a component installed in the energy absorption housing (2) to absorb radiant energy inside the greenhouse. If it can absorb radiant energy inside the greenhouse, such as a solar panel, and can be installed inside a transparent hexahedron, it can be selected without any special restrictions, but it is preferable that it be composed of a black body (31).

[0049] The above black body (31) refers to an object whose solar radiation energy absorption rate is theoretically 1, and can effectively absorb solar radiation energy of all wavelengths to mitigate the diffusion of solar radiation energy into the surroundings (environment). By quickly dissipating heat outside the greenhouse through the heat highway function that absorbs part of the solar radiation energy entering the greenhouse at the side wall of the greenhouse, it can have the effect of mitigating the temperature rise inside the greenhouse.

[0050] For example, a black body (31) is composed of a thermally conductive base plate (311) having thermal conductivity and a black body coating portion (312) laminated on the thermally conductive base plate (311).

[0051] It is preferable that the thermally conductive base plate (311) be composed of a metal plate with high thermal conductivity, such as aluminum.

[0052] The black body coating portion (312) can be formed by painting a known black body paint having high emissivity, heat resistance, wear resistance, and chemical resistance onto a thermally conductive base plate (311).

[0053] Meanwhile, the heat exchanger (4) is a component that exchanges heat with the radiant energy absorbed by the heat absorber (3). There are no special restrictions as long as the heat exchange efficiency is excellent, but it is composed of a vibrating heat pipe (41) that can cool and resupply high-temperature greenhouse air in the summer and perform heat storage through heat transfer at a high heat flux.

[0054] The vibrating heat pipe (41) has one upper side connected to the heat absorber (3) and the other lower side immersed in the heat exchange tank (5), and transfers the heat of the heat absorber (3) to the water of the heat exchange tank (5) through evaporation and condensation of the working fluid without external power.

[0055] And the vibrating heat pipe (41) is a device that transfers heat without a separate external power by injecting a working fluid into the sealed interior of a tube formed to form a closed circuit as is well known and then evacuating the vacuum, through evaporation and condensation of the working fluid. Here, the working fluid generally refers to a refrigerant, and in a heat engine, the fluid supplied with heat energy expands to do mechanical work, and then releases the remaining energy to return to its original state and then receives heat again, thereby generating power through one cycle in which the fluid undergoes several state changes. In addition, the vibrating heat pipe (41) is widely used as a product with excellent heat exchange characteristics when the minimum operating temperature difference between the heat exchange objects (the surface of the black body and the water contained in the heat exchange tank) is 7℃ or more, but is not limited thereto.

[0056] The heat exchange tank (5) is a component placed in contact with the energy absorption body (2), and includes a tank body (51) placed at the bottom of a transparent hexahedron (21) and containing water therein, a second connection part (52) formed at the top of the tank body (51) and connected to the first connection part (23), an exhaust nozzle (53) formed in the tank body (51) and through which water inside is discharged, and an inlet nozzle (54) formed in the tank body (51) and through which water inside is recovered therein.

[0057] Meanwhile, the greenhouse heating and cooling system using a heat absorber according to the first embodiment of the present invention may further include a heat storage unit (not shown) that stores heat exchanged by the heat exchange unit (4).

[0058] The heat storage unit (not shown) can be formed in the form of a water channel so as to be connected to the heat exchange tank unit (5) so that the water of the heat exchange tank unit (5) can be circulated, and can be composed of a gutter-type distributed heat storage tank (not shown) installed in at least one location among the above-ground part of the greenhouse (1), the underground part of the greenhouse, and the outside of the greenhouse. This gutter-type distributed heat storage tank can store hot water heated during the day and use it as heating water, etc. when heating is required, such as at night.

[0059] And the unexplained symbol 9 of Fig. 1 is a plant cultivation table on which a medium for growing plants is placed, and is installed in multiple rows inside the greenhouse.

[0060] Hereinafter, the operation of a greenhouse heating and cooling system using a heat absorber according to the first embodiment of the present invention will be briefly described.

[0061] Referring to Figure 1, when sunlight is incident, the interior of the greenhouse (1) is heated, 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 organic radiation energy absorption function of the energy absorption body (2), the heat absorber (3), the heat exchanger (4), and the heat exchange tank (5) performs an appropriate auxiliary cooling function before the solar radiation energy is diffused into the greenhouse.

[0062] To explain more specifically, solar radiation energy entering or flowing into the greenhouse first enters the energy absorption housing (2) and is then transferred to a black body (31) with a high absorption rate of radiation energy, thereby increasing the temperature of the black body.

[0063] And since the upper part of the vibrating heat pipe (41) is connected to the lower part of the black body (31), the heat transferred to the black body (31) is transferred to the water contained in the heat exchange tank (5) by the heat exchange action of the vibrating heat pipe (41). That is, the vibrating heat pipe (41) performs the function of heating the water contained in the heat exchange tank (5) and lowering the temperature of the black body (31) by performing heat exchange through evaporation and condensation of the working fluid without external power.

[0064] As a result of the experiment, it was confirmed that when the heat exchanger (4) was not installed, the temperature of the black body (31) rose to a maximum of 90°C or more, and the temperature inside the radiation energy absorption room (25) of the energy absorption housing (2) rose to 70°C or more. However, when the vibrating heat pipe (41) was connected to the lower part of the black body as the heat exchanger (4), it was confirmed that the temperature of the black body was maintained at 40 to 45°C through the heat transfer process.

[0065] As described above, according to the greenhouse heating and cooling system using the heat absorber according to the first embodiment of the present invention, among the solar radiant energy transmitted to the greenhouse, infrared rays and far infrared rays having a large wavelength range that increases the temperature inside the greenhouse other than the visible light range used for photosynthesis are removed from the greenhouse through the organic action of the heat absorber (3), the heat exchange unit (4), and the heat exchange tank unit (5), thereby suppressing the temperature increase by 15 to 20% compared to the conventional method.

[0066] In addition, in the case where the greenhouse heating and cooling system using a heat absorber according to the first embodiment of the present invention separately configures a heat storage unit such as a gutter-type distributed heat storage tank in the above-ground part of the greenhouse (1), the underground part of the greenhouse, the outside of the greenhouse, etc., hot water heated using radiant energy during the day is stored in the heat storage unit, so that it can be used as heating water, etc. when heating is required, such as at night.

[0067] 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.

[0068] Figure 3 is a schematic diagram for explaining a heating and cooling system for a greenhouse using a heat absorber according to a second embodiment of the present invention, and the main components are simplified to help understanding.

[0069] Referring to FIG. 3, a heating and cooling system for a greenhouse using a heat absorber according to a second embodiment of the present invention comprises a greenhouse (1) having a cultivation space provided therein, an energy absorption container (2) installed in the greenhouse and having a radiant energy absorption room (25) provided therein, a heat absorber (3) installed in the energy absorption container and absorbing radiant energy inside the greenhouse, a heat exchange unit (4) performing heat exchange, and a heat exchange tank unit (5) arranged in contact with the energy absorption container (2), and further comprising a heat storage unit (6) for storing heat, and a heat pump (7) for operating by recycling a heat source transferred from the heat exchange unit.

[0070] The heat storage unit (6) is composed of a heat storage tank (61) that receives water to store the heat exchanged by the heat exchange unit (4).

[0071] The heat pump (7) is a component for transferring the heat recovered in the water of the heat exchange tank (5) heated by the heat exchange unit (4) to the heat storage unit or heating the greenhouse via 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.

[0072] A heating and cooling system for a greenhouse using a heat absorber according to a second embodiment of the present invention is provided with a piping line (82), a pump (83), and a valve (84) to circulate heated water from a heat exchange tank (5) to a heat pump (7), and to store or heat the high-temperature water produced by the heat pump in a heat storage unit (6).

[0073] For example, the piping line (82) includes a first water supply line (821) connected to supply heated water from the heat exchange tank (5) to the heat pump (7), a first water recovery line (822) connected to return water from the heat pump to the heat exchange tank (5), a second water supply line (823) connected to supply heated water from the heat pump toward the heating unit (81), a second water recovery line (824) connected to return water used for heating in the heating unit to the heat storage tank (61), a first branch line (825) branched from the second water supply line and connected to the heat storage tank, and a second branch line (826) connected to supply water from the heat storage tank (61) to the heat pump.

[0074] 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).

[0075] Meanwhile, the greenhouse heating and cooling system using a heat absorber according to the second embodiment of the present invention can remove solar radiation energy of the greenhouse through the organic operation of the heat absorber (3), the heat exchanger (4), and the heat exchange tank (5) as described in the operation description part of the first embodiment described above, and at the same time, since the heat storage unit (6) and the heat pump (7) are further provided, the heated water of the heat exchange tank unit (5) is used to operate the heat pump (7) to form high-temperature water and then use it for heating the greenhouse, or the high-temperature water generated by the heat pump (7) is stored in the heat storage unit (6) and circulated to the heating unit (81) of the greenhouse, so that the heating and cooling system can be stably operated.

[0076] The water circulation between the above-mentioned heat exchange tank (5) and the heat pump (7) is carried out through the first water supply line (821) and the first water recovery line (822), and at this time, the pumping operations of the first pump (831) and the second pump (832) are performed. In addition, the water circulation between the heat pump (7) and the heating unit (81) is carried out through the second water supply line (823) and the second water recovery line (824).

[0077] FIG. 4 is a schematic diagram for explaining a modified example of a greenhouse heating and cooling system using a heat absorber according to a second embodiment of the present invention, and the main components are simplified to help understanding.

[0078] Referring to FIG. 4, the greenhouse heating and cooling system using a heat absorber according to the second embodiment of the present invention is characterized in that it is configured to utilize waste heat more stably and effectively by configuring it to selectively supply heated water from a heat exchange tank (5) to a heat pump (7) and a heat storage unit (6).

[0079] To this end, the piping line (82) connecting the heat exchange tank (5), the heat storage unit (6), and the heat pump (7) further includes a third branch line (827) branched from the first water supply line (821) and connected to the heat storage tank (61) and supplying heated water, a fourth branch line (828) branched from the first water recovery line (822) and connected to the heat storage tank (61) and recovering water, and a discharge line (829) extending from the third branch line (827) and discharging heated water.

[0080] The valve (84) includes a second control valve (842) installed at a branch of the first water supply line (821) and the third branch line (827), a third control valve (843) installed at a branch of the first water recovery line (822) and the fourth branch line (828), and a fourth control valve (844) installed at a branch of the third branch line (827) and the discharge line (829).

[0081] Here, the first to fourth control valves (841, 842, 843, 844) are configured as three-way automatic control valves equipped with electric actuators to enable automatic control while minimizing the number of valves installed.

[0082] As described above, the greenhouse heating and cooling system using a heat absorber according to a modified example of the second embodiment of the present invention is further provided with a third branch line (827), a fourth branch line (828), a discharge line (829), second to fourth control valves (842, 843, 844), etc., so that the heated water of the heat exchange tank (5) can be directly stored in the heat storage unit (6) and circulated to the heating unit (81) of the greenhouse for heating, and when necessary, the heated water can be discharged to the outside through the discharge line (828), so that there is an advantage in that the heating and cooling system can be implemented in a more diverse and efficient manner.

[0083] 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.

[0084] Although the configuration and operation of a greenhouse heating and cooling system using a heat absorber 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.

[0085] Therefore, the scope of protection of the present invention should be understood to extend to the invention described in the claims and its equivalents.

[0086] The present invention relates to a heating and cooling system for a greenhouse using a heat absorber, which can reduce energy costs and improve the efficiency of greenhouse management by absorbing radiant energy when cooling is required and recycling the absorbed heat energy to perform heating when heating is required. The present invention can be mainly applied to glass greenhouses or vinyl houses, but is not limited thereto, and can be implemented by applying it to various facilities where solar radiant energy remains.

Claims

1. A greenhouse with a cultivation space inside; An energy absorption enclosure installed in the above greenhouse and having a radiation energy absorption room provided inside; A heat absorber installed in the energy absorption body to absorb radiant energy inside the greenhouse; and A heating and cooling system for a greenhouse using a heat absorber, characterized in that it includes a heat exchange unit that exchanges heat with radiant energy absorbed by the heat absorber.

2. In paragraph 1, A heat exchange tank portion placed in contact with the energy absorption body and containing water heated by the heat exchange action of the heat exchange portion; and Further comprising a heat storage unit that stores the heat exchanged by the above heat exchange unit, A heating and cooling system for a greenhouse using a heat absorber, characterized in that the heat storage unit is connected to the heat exchange tank unit so that water is stored, and includes a groove-type spray heat storage tank installed in at least one location among the above-ground part of the greenhouse, the underground part of the greenhouse, and the outside of the greenhouse.

3. Greenhouse with cultivation space inside; An energy absorption enclosure installed in the above greenhouse and having a radiation energy absorption room provided inside; A heat absorber installed in the energy absorption body to absorb radiant energy inside the greenhouse; A heat exchanger that exchanges heat with the radiant energy absorbed by the above heat absorber; A heat storage unit that stores the heat exchanged by the heat exchange unit; and A heating and cooling system for a greenhouse using a heat absorber, characterized in that it includes a heat pump that operates using a heat source transferred from at least one of the above heat storage unit and the above heat exchange unit.

4. In paragraph 3, It further includes a heat exchange tank portion which is placed in contact with the energy absorption body and receives water heated by the heat exchange action of the heat exchange portion; A heating and cooling system for a greenhouse using a heat absorber, characterized in that the heat exchanger is configured as a vibrating heat pipe having one side connected to the heat absorber and the other side immersed in the heat exchange tank, and transferring the heat of the heat absorber to the water of the heat exchange tank by evaporation and condensation of a working fluid without external power.

5. In paragraph 4, The above storage unit is composed of a storage tank that holds water, A heating and cooling system for a greenhouse using a heat absorber, characterized in that it comprises a pipe line having a first water supply line connected to supply heated water of the heat exchange tank to the heat pump, a first water recovery line connected to recover water of the heat pump to the heat exchange tank, a second water supply line connected to supply heated water of the heat pump toward the heating section of the heat pump, a second water recovery line connected to recover water used for heating in the heating section to a heat storage tank, a first branch line branching from the second water supply line and connected to the heat storage tank, a second branch line connected to supply water of the heat storage tank to the heat pump, a third branch line branching from the first water supply line and connected to the heat storage tank and supplying heated water, a fourth branch line branching from the first water recovery line and connected to the heat storage tank and recovering water, and a discharge line extending from the third branch line and discharging heated water.

6. In paragraph 5, A valve including a first control valve installed in a branch portion of the second water supply line and the first branch line, a second control valve installed in a branch portion of the first water supply line and the third branch line, a third control valve installed in a branch portion of the first water recovery line and the fourth branch line, and a fourth control valve installed in a branch portion of the third branch line and the discharge line; and A heating and cooling system for a greenhouse using a heat absorber, characterized in that it includes a pump including a first pump installed in the first water supply line and a second pump installed in the first water recovery line.

7. In any one of paragraphs 1 to 6, A greenhouse heating and cooling system using a heat absorber, characterized in that the heat absorber is composed of a black body or a solar panel.

8. In paragraph 7, The above black body is, A thermally conductive base plate having thermal conductivity; and A greenhouse heating and cooling system using a heat absorber, characterized in that it includes a black body coating portion laminated on the above thermally conductive base plate.

9. In Article 8, The above energy absorbing body is, A transparent hexahedron formed in the shape of a plate-shaped hexahedron, installed on the side wall of the greenhouse, formed of a transparent material to allow light to enter, and having a heat exchanger inlet perforated; A black body fixing part formed on the transparent hexahedron so that the thermally conductive base plate is fixed; A first connecting portion formed on the transparent hexahedron so as to be connected to the heat exchange tank; and A heating and cooling system for a greenhouse using a heat absorber, characterized in that it includes a heat exchanger fixing member that is fastened to fix the heat exchanger.

10. In paragraph 9, The above heat exchange tank part, A tank body placed at the bottom of the above transparent hexahedron and containing water inside; A second connecting portion formed on the upper portion of the tank body and connected to the first connecting portion; An exhaust nozzle formed in the above tank body to discharge the water inside; and A heating and cooling system for a greenhouse using a heat absorber, characterized in that it includes an inlet nozzle formed in the water tank body and through which water is recovered inside.

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