Localized Cooling Air Conditioning System for Air House

Abstract

This research was conducted with funding from the Ministry of Agriculture, Food and Rural Affairs, the Ministry of Science and ICT, and the Rural Development Administration, and supported by the Smart Farm Multi-Ministerial Package Innovation Technology Development Project of the Korea Institute of Planning and Evaluation for Agricultural and Food Technology (IPET) and the Smart Farm Research & Development Foundation (RS-2025-02314149) The present invention relates to a localized cooling air conditioning system for an air house that controls the temperature and growth environment inside the air house, and in particular, can selectively supply cooling air to specific parts of the crop, such as the upper part, stem, or near the roots, according to the crop's growth characteristics or environmental requirements.

Description

Technology Field

[0001] This research was conducted with funding from the Ministry of Agriculture, Food and Rural Affairs, the Ministry of Science and ICT, and the Rural Development Administration, and supported by the Smart Farm Multi-Ministerial Package Innovation Technology Development Project of the Korea Institute of Planning and Evaluation for Agricultural and Food Technology (IPET) and the Smart Farm Research & Development Foundation (RS-2025-02314149)

[0002] The present invention relates to a localized cooling air conditioning system for an air house, and more specifically, to a localized cooling air conditioning system for an air house that controls the temperature and growth environment inside the air house, and in particular, can selectively supply cooling air to specific parts of the crop, such as the upper part, stem, or near the roots, according to the growth characteristics or environmental requirements of the crop. Background Technology

[0003] An airhouse is a facility designed to support crop growth by creating a constant internal environment regardless of external weather conditions. Recently, there has been a surge in the adoption of HVAC systems capable of precisely controlling internal temperature, humidity, carbon dioxide concentration, and air circulation, going beyond simple heat retention and moisture control. In particular, with the increasing frequency of climate change, heatwaves, and abnormal high temperatures, there is a growing need for technologies that can effectively lower the internal temperature of airhouses and stabilize the crop growth environment.

[0004] Conventional airhouse cooling technology was primarily achieved by opening ceiling vents or utilizing convective, large-area cooling devices such as side-wall vents, fans, or evaporative cooling pads. While this method can be effective in lowering the average temperature of the entire greenhouse space, it is difficult to control localized temperature variations. In other words, the cooling effect is strong in areas close to the air conditioning system, but the temperature reduction is weak in the center, lower part of the greenhouse, or ventilation blind spots, resulting in uneven growth environments for crops across different parts of the structure.

[0005] Meanwhile, considering the growth characteristics of crops, simply lowering the temperature of the entire greenhouse is often insufficient. For example, while lush foliage crops can achieve a self-cooling effect through transpiration on the leaf surface, the root area, due to its direct contact with the soil, can experience reduced root vitality and a significant decrease in nutrient absorption if exposed to high temperatures for extended periods. Conversely, for some crops, temperature control of the upper parts is paramount because fruit set rates and quality deteriorate rapidly if the temperature of the flowers or fruits rises above a certain level. Therefore, there is a growing need for a system capable of supplying cooling air to specific areas—such as the upper parts, stems, and roots—depending on the crop's needs.

[0006] Some conventional technologies employ structures that use blower fans and air ducts to forcibly circulate air inside the greenhouse or supply cooling air. However, in most of these structures, the exhaust vents of the ducts are fixed in a fixed position, making it difficult to achieve selective cooling to specific areas. Furthermore, it is difficult to finely adjust the direction of the air discharged from the ducts, and problems arise where the cooling effect becomes uneven if the crop arrangement inside the greenhouse changes or the crops differ in their growth stage.

[0007] In particular, during high temperatures, hot air stagnates in the upper part of the greenhouse, making upper leaves or fruits susceptible to heat damage, and the soil temperature in the root areas near the ground rises rapidly, which can weaken root vitality. However, conventional technology has focused on lowering the overall air temperature of the greenhouse, so there were limitations in effectively lowering the temperature of specific areas.

[0008] Another issue is energy efficiency. The whole-space cooling method consumes a large amount of power because it requires operating large-capacity cooling units and fans. Furthermore, it unnecessarily cools the entire space even when cooling only localized areas of the crop would be sufficient. This leads not only to increased operating costs but also to a decrease in cooling efficiency. Prior art literature

[0009] Korean Published Patent Application No. 10-2024-0075163: Air house equipped with a heat exchange structure to enable crop cultivation and livestock rearing Korean Registered Patent Application No. 10-1054063: Air curtain for a vinyl greenhouse including a duct function The problem to be solved

[0010] The present invention was created to solve the aforementioned problems and aims to provide a localized cooling air conditioning system for an airhouse that can supply selective and intensive cooling air to specific parts, such as the top, stem, and roots, according to the growth characteristics or cultivation stage of the crop inside the airhouse, thereby alleviating high-temperature stress occurring in key parts of the crop and reducing unnecessary energy waste associated with cooling the entire space, while creating a uniform and stable growth environment. means of solving the problem

[0011] The present invention relates to a local cooling air conditioning system for an air house that supplies air to an air house comprising an inner house that expands by air injected into it to form a predetermined internal space, and an outer house that can cover the exterior of the inner house. The system comprises a blower that supplies air so that the internal pressure of the inner house can be maintained relatively higher than atmospheric pressure; an air duct that provides an air passage to supply air discharged through the blower to an internal area of ​​the inner house and has a plurality of exhaust holes formed at predetermined intervals along the longitudinal direction; a heat exchanger installed in the air passage between the blower and the air duct, wherein heat exchange is performed to control the temperature of the air supplied through the blower; and a duct moving unit that moves the air duct so that air is discharged to a point within the inner house where local cooling is to be performed.

[0012] The above air duct is connected at one end to communicate with the air outlet of the blower and comprises a main tube having a predetermined flow path and a branch tube branching from the main tube, forming an exhaust section through which air is discharged, and having the exhaust port formed therein. A check valve is formed at the end of the branch tube to open and close the exhaust port, wherein the check valve is formed to open when the internal pressure of the main tube reaches a set level or higher.

[0013] The above-described duct moving unit comprises a first support member and a second support member installed at each end of the inner house, a first lifting drive member and a second lifting drive member installed to be vertically movable at each of the first support member and the second support member, respectively, and a guide frame to which the main tube is connected, wherein both ends are connected to the first lifting drive member and the second lifting drive member, respectively, and vertical lifting is driven by the first lifting drive member. The guide frame preferably comprises a first frame member in the shape of a square frame extending along the width and length directions of the inner house, and a plurality of second frame members extending parallel to the first frame member along the length direction and to which the main tube is connected.

[0014] The second frame part is connected to the first frame part by a width direction drive part so as to be movable a predetermined distance along the width direction of the first frame part, wherein the width direction drive part preferably includes a rack extending along the width direction of the inner house on the upper surfaces of one side and the other side frame member extending along the width direction of the first frame part, a pinion member engaged with the rack, and a first moving motor that drives the pinion member.

[0015] It is preferable that the first lifting drive unit and the second lifting drive unit are equipped with a level sensor including a laser pointer, and that the lifting height of the first support unit and the second support unit is adjusted to match by the level sensor.

[0016] The main tube is preferably formed with a plurality of support hooks that can be attached to the second frame portion, spaced apart at a predetermined interval along the longitudinal direction, and a weight is installed at the bottom of the main tube so that the main tube can maintain a constant direction even during air discharge.

[0017] It is preferable that the distance adjustment unit further includes a distance adjustment unit that allows the distance at which the weight is separated from the center of the main tube to be adjusted according to the air pressure inside the main tube, wherein the distance adjustment unit includes a distance adjustment tube extending downward from the main tube, a lifting plate installed inside the distance adjustment tube so as to be vertically movable along the longitudinal direction of the distance adjustment tube, a spring elastically supporting the lifting plate upward inside the distance adjustment tube, and a connecting member extending from the lifting plate and connected to the weight, wherein the position of the weight is adjusted as the lifting plate moves away from the center of the main tube according to the internal pressure of the main tube. Effects of the invention

[0018] According to the local cooling air conditioning system for an air house of the present invention, cooling air can be supplied directly to the upper part, stem, or root of the crop, thereby allowing for precise control of environmental conditions for each part of the crop. This prevents the deterioration of leaf and fruit quality even during high-temperature periods and stabilizes the soil temperature of the root area to maintain root vitality. Furthermore, by providing localized cooling only to necessary zones or parts without unnecessarily cooling the entire space of the greenhouse, there is an advantage of improved energy efficiency and reduced operating costs. Brief explanation of the drawing

[0019] FIG. 1 is a partially cutaway perspective view of an embodiment of an airhouse to which a local cooling air conditioning system for an airhouse according to the present invention is applied. FIG. 2 is a perspective view illustrating a blower and a heat exchanger of a local cooling air conditioning system for an air house according to the present invention. FIG. 3 is a conceptual diagram showing the state in which the heat exchanger of FIG. 2 cools air through an underground buried pipe. FIG. 4 is a perspective view illustrating an air duct of the present invention. FIG. 5 is a cross-sectional view illustrating another embodiment of a check valve, FIG. 6 is a perspective view illustrating a duct moving unit of the present invention. FIG. 7 is a drawing showing the state in which the position of an air duct is adjusted by a duct moving unit. FIG. 8 is a cross-sectional view of another embodiment of an air duct further comprising a weight, FIG. 9 is a cross-sectional view illustrating another embodiment of a blower system for an air house that further includes a distance adjustment section for a weight. Specific details for implementing the invention

[0020] Hereinafter, a local cooling air conditioning system (10) for an air house according to an embodiment of the present invention will be described in detail with reference to the attached drawings. Since the present invention is capable of various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing. In the attached drawings, the dimensions of the structures are shown enlarged compared to the actual dimensions to ensure clarity of the present invention.

[0021] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0022] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0023] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0025] Hereinafter, a local cooling air conditioning system (10) for an air house according to the present invention will be described in more detail with reference to the attached drawings.

[0026] The local cooling air conditioning system (10) for an air house according to the present invention is installed in an air house (1) and is configured to supply air into the interior of the air house (1).

[0027] Referring to FIG. 1, the air house (1) is configured to include an inner house (3) and an outer house (2), and a local cooling air conditioning system (10) for the air house of the present invention is provided so that a pressure greater than atmospheric pressure can be maintained inside the inner house (3) and the outer house (2).

[0028] The above-mentioned inner house (3) expands by air injected into it to form a predetermined inner space and includes an inner membrane with its edges fixed to the ground.

[0029] It is preferable that the inner membrane be formed to be flexible enough to be expanded by air, while having enough durability so as not to be torn or punctured by external impact, and if necessary, a mesh-shaped reinforcing net may be provided on the outer surface of the inner membrane to support the inner house (3).

[0030] The above-mentioned outer house (2) is installed outside the inner house (3), and the outer house (2) is also formed to expand by air flowing in from the outside. The outer house (2) is spaced apart from the inner house (3) by a predetermined distance to form a predetermined separation space, i.e., an insulating space, and a reinforcing mesh in the form of a net to support the outer house (2) may also be provided on the outer surface of the outer membrane constituting the outer house (2).

[0031] Air is introduced into the interior of the inner house (3) and the outer house (2) at a pressure relatively higher than atmospheric pressure so that the inner membrane and the outer membrane can be maintained in an expanded state. The blower system for supplying air to the interior of the inner house (3) and the outer house (2) may be the same, or separate systems may be installed for the inner house and the outer house.

[0032] The local cooling air conditioning system (10) for an air house according to the present invention comprises a blower (100) for supplying air to the internal space of the internal house (3), an air duct (200) connected to the air outlet (112) of the blower (100) and configured to transport and discharge air to the internal area of ​​the internal house (3), a heat exchanger (300) installed between the blower (100) and the air duct (200) for controlling the temperature of the air supplied through the blower (100), and a duct moving unit (400) for moving the air duct (200) to a point where local cooling is to be performed.

[0033] Referring to FIG. 2, the blower (100) may be configured to include a general blower structure, comprising a blower body (110) having an inlet (111) for external air to be introduced and a blower port (112) for air to be discharged formed on one side and the other side, respectively, a blower fan (120) installed in the blower body (110) to introduce external air through the inlet (111) and then discharge it through the blower port (112), and a blower motor (130) for driving the blower fan (120).

[0034] A machine room (4) in which the blower (100) can be installed may be provided on one side of the air house (1), and the blower (100) is installed in the machine room (4), and a control panel for operating the blower (100) may also be installed in the machine room (4).

[0035] In this embodiment, four blowers (100) are shown installed, but the number of blowers (100) can be varied depending on the size of the air house (1) or the blowing capacity of the blowers (100).

[0036] The above heat exchanger (300) is intended to control the temperature of the air discharged from the blower (100) and can be applied to adjust the temperature of the air discharged from the blower (100) to a set temperature.

[0037] In particular, in the present embodiment, a heat exchanger (300) is formed to lower the temperature of the supplied air so that local cooling can be performed on the crop during the summer. During the summer, the temperature inside the air house continuously rises, which can hinder the growth of the crop. Furthermore, while the temperature of the leaves of the crop can be regulated to some extent through transpiration, such a cooling effect cannot be achieved in the roots or stems, so it is necessary to artificially lower the temperature at those points.

[0038] Accordingly, the local cooling air conditioning system (10) for an air house of the present invention is designed to supply air with a temperature controlled at a specific point to expect a local cooling effect, and the heat exchanger (300) is provided so that air at a set temperature can be supplied.

[0039] The heat exchanger (300) may be a geothermal-based heat pipe that circulates heat exchange water through an underground pipe (310) installed underground as shown in FIG. 3 to allow heat exchange between the air discharged from the blower (100) and the heat exchanger (320), and unlike the present embodiment, air cooling may be achieved through a thermoelectric element or a cooling system.

[0040] Referring to FIG. 4, the air duct (200) extends from the heat exchanger (300) and is installed to extend along one direction inside the air house (1).

[0041] The air duct (200) is provided with a main tube (210) having a predetermined flow path, a branch tube (220) branching from the main tube (210), and a check valve (230) for opening and closing an exhaust port (221) of the branch tube (220).

[0042] The main tube (210) is a tube-shaped structure having a predetermined flow path through which air can move, as described above. One end of the main tube (210) is connected to a heat exchanger, and is formed so that it can move along the flow path of the main tube (210) when forced convection is carried out by the blower (100). In this embodiment, the main tube (210) is shown extending one from each of the four blowers (100) and extending parallel along the longitudinal direction inside the air house (1); however, unlike this embodiment, the main tube (210) may be formed to extend along a zigzag direction inside the air house (1), that is, within the interior space of the inner house (3).

[0043] In addition, in the present embodiment, a heat exchanger (300) is individually connected to each blower (100), but it may also be formed such that four blowers (100) are connected to a single heat exchanger. However, even in this case, only one air passage is connected from each blower (100) to the air duct (200), and the portion where heat exchange can take place on each air passage may be shared.

[0044] The branch tube (220) is branched out from the main tube (210) and extends, and a plurality of them are formed at a predetermined interval along the longitudinal direction of the main tube (210). The branch tube (220) is formed to communicate with the flow path of the main tube (210), and an exhaust port (221) capable of discharging air to the outside is formed at the end of the branch tube (220). It is preferable that the branch tube (220) be formed so that the manager can directly control the direction in which the exhaust port (221) faces, that is, the direction in which air is discharged through the exhaust port (221). For example, the branch tube (220) is formed in the shape of a corrugated tube so that it can be bent to control the direction of the exhaust port (221). And a wire for maintaining the bent shape inside the branch tube (220) may be included, or the branch tube (220) itself may be formed as a metal gooseneck stay-foot tube made of a metal material to which the shape can be fixed.

[0045] Controlling the air discharge direction of the branch tube (220) is intended to control the air supply direction according to the purpose of the air house (1). When the air house (1) is used for agricultural purposes and crops are grown in the internal space of the inner house (3), depending on the type of crop, it may be desirable to spray air directly toward the crop, or it may be inappropriate for the crop growth to discharge air directly toward the crop. Thus, depending on the type and characteristics of the crop cultivated in the air house (1), the manager can adjust the direction in which the exhaust hole (221) is directed through the branch tube (220) formed in a gooseneck shape.

[0046] A check valve (230) for opening and closing an exhaust port (221) is installed at the end of the branch tube (220). The check valve (230) is provided so that the exhaust port (221) can be opened when the internal pressure of the main tube (210) exceeds a set reference value, thereby ensuring that air is discharged uniformly throughout the entire interior of the air house (1).

[0047] When the exhaust port (221) of the branch tube (220) is open, the amount of air discharged from one side of the main tube (210) close to the blower (100) and the other side of the main tube (210) far from the blower (100) will inevitably be different. That is, a larger amount of air is discharged from the main tube (210) on the side close to the blower (100), and the amount of air discharged decreases as it moves further away from the blower (100).

[0048] However, since the air duct (200) of the present invention is provided with a check valve (230) at the end of the branch tube (220), the exhaust port (221) is not opened until the internal pressure of the main tube (210) reaches a certain level. Therefore, when the internal space of the main tube (210) is completely filled with air from the blower (100) and the set pressure is reached, the check valve (230) opens all at once, and air is discharged through the exhaust port (221) over the entire length of the main tube (210). Accordingly, air can be supplied evenly throughout the entire internal area of ​​the air house (1).

[0049] The above check valve (230) may be configured to include a partition plate (231) having a predetermined through hole (232) formed therein, and a valve seat (233) installed on the partition plate (231) to cover the through hole (232). The valve seat (233) may be installed on a surface exposed toward the space of the inner house (3) and may be installed in a manner that allows air to be discharged from the branch tube (220) and blocks air from entering the interior of the branch tube (220) from the space of the inner house (3). Additionally, when the internal pressure of the main tube (210) becomes relatively greater than the pressure of the inner house (3), the valve seat (233) may be formed in a manner that allows air to be discharged through the through hole (232) while being spaced apart toward the interior space of the inner house (3). In this case, air is discharged from the main tube (210) only when the internal pressure of the main tube (210) becomes greater than the internal pressure of the inner house (3), so the pressure set for the discharge of air becomes the internal pressure of the inner house (3).

[0050] FIG. 5 illustrates another embodiment of the check valve (240). The check valve (240) of this embodiment may also be composed of a valve box (241) installed at the end of the branch tube (220), a blocking member (242) installed in the valve box (241), and a valve spring (243) that elastically supports the blocking member (242) toward the exhaust port (221). In this case, the elastic force of the valve spring (243) may be a set pressure, and when the internal pressure of the main tube (210) becomes greater than the elastic force of the valve spring (243), the blocking member (242) supported by the spring may be separated from the branch tube (220), and the air inside the main tube (210) may escape and move toward the inner house (3).

[0051] Thus, since the air duct (200) of the present invention is configured to supply air uniformly throughout the entire interior area of ​​the inner house (3), it is possible to supply uniform air from the area close to the blower (100) to the area far away.

[0052] Referring to FIGS. 1 and 6, the main tube (210) of the air duct (200) is supported by a duct moving unit (400), and the position of the supply point where air is supplied, i.e., the height at which the end of the branch tube (220) is located, or the position in the width direction within the inner house (3) can be adjusted according to the operation of the duct moving unit (400).

[0053] The above duct moving unit (400) includes a first support member (410) and a second support member (420) installed at each end of the inner house (3), a first lifting drive member (430) and a second lifting drive member (440) installed to be vertically movable on the first support member (410) and the second support member (420), respectively, and a guide frame to which the main tube (210) is connected, the guide frame having both ends connected to the first lifting drive member (430) and the second lifting drive member (440), so that vertical lifting is driven by the first and second lifting drive members (430, 440).

[0054] Two first support members (410) are installed at one end of the inner house (3) along the length direction and spaced apart from each other along the width direction, and a first lifting drive member (430) is installed in each first support member (410). Two second support members (420) are also installed, spaced apart from each other along the width direction at the other end of the inner house (3) along the length direction, and a second lifting drive member (440) is installed in each.

[0055] The guide frame includes a first frame section (450) in the shape of a square frame and a plurality of second frame sections (460) that extend parallel to the first frame section (450) along the longitudinal direction and to which the main tube (210) is connected.

[0056] The first frame section (450) has four corner sections each connected to the first lifting drive unit (430) and the second lifting drive unit (440), so that it can move up and down according to the lifting drive of the first lifting drive unit (430) and the second lifting drive unit (440). Additionally, the second frame section (460) is connected to the first frame section (450) by a width direction drive unit (470) so that it can move a predetermined distance along the width direction of the first frame section (450).

[0057] The above width-direction drive unit (470) includes a rack (471) formed on the upper surface of the first frame unit (450), a pinion member (472) engaged with the rack (471), and a first moving motor (473) that drives the pinion member (472). The rack (471) is formed on the upper surface of two frame members that extend along the width direction of the inner house (3) in the first frame unit (450), and the width-direction drive unit (470) moves along the extension direction of the rack (471) according to the driving of the pinion member (472) which rotates by the first moving motor (473). Through this, the second frame part (460) supported by the width-direction drive part (470) moves along the width direction of the inner house (3), and the main tube (210) supported by the second frame part (460) can also move a predetermined length.

[0058] The first lifting drive unit (430) and the second lifting drive unit (440) can also move up and down along the first support unit (410) or the second support unit (420) through a rack and pinion connection structure, and up and down movement is achieved by driving the second movement motor (480) installed in the first lifting drive unit (430) and the second lifting drive unit (440).

[0059] In particular, the first elevator drive unit (430) and the second elevator drive unit (440) are equipped with a level sensor (474) to ensure they are level with other elevator drive units spaced apart along the width and length directions of the inner house (3). The level sensor (474) may be a light-emitting sensor including a laser pointer, and one of the four elevator drive units is designated as a reference drive unit, with a laser oscillator installed in that elevator drive unit. Additionally, a receiver for receiving a laser is installed in the remaining elevator drive units, and the four elevator drive units can be maintained level through the principle that the laser can be received by the receiver when the four elevator drive units are in a horizontal position.

[0060] By maintaining the horizontal state of the four lifting drive units in this way, the second frame unit (460) supporting the air duct (200) can accurately maintain a horizontal state.

[0061] In the present invention, since the position of the air duct (200) can be moved through the duct moving unit (400), local cooling can be achieved by spraying cooled air at a point where local cooling is required.

[0062] As illustrated in FIG. 7, when local cooling is required on the stem or root of a crop, the height of the first frame part (450) can be moved to an advantage adjacent to the stem or root of the crop through the first lifting drive part (430) and the second lifting drive part (440). Also, since the air duct (200) can be moved along the width direction of the inner house (3) through the width direction drive part (470), it can be easily adjusted as needed when interference with the crop occurs during the process of moving the first frame part (450) up and down, or when the air discharge point is to be adjusted along the width direction of the air house.

[0063] The above main tube (210) is installed in the second frame part (460) as described above.

[0064] A plurality of support rings (250) through which a second frame part can pass are formed at predetermined intervals along the longitudinal direction of the main tube (210) on the upper part of the main tube (210), so that the main tube (210) can be supported in a hanging state on the second frame part (460).

[0065] As illustrated in FIG. 8, a weight (260) may be installed at the lower center of the main tube (210) to help the main tube (210) maintain a constant direction. Since the main tube (210) is suspended by the second frame part (460), it can rotate around the support ring (250). In particular, when air is discharged through the branch tube (220), the main tube (210) may rotate in the opposite direction to the direction of air discharge due to the reaction force resulting from the discharge of air. If the branch tubes (220) are arranged symmetrically in both directions around the main tube (210), the individual reaction forces in each branch tube (220) will cancel each other out, so no actual rotation will occur in the main tube (210). However, if the branch tubes (220) are arranged asymmetrically as needed, or if a relatively high volume of air is discharged from the branch tubes (220) in a specific direction, an imbalance of reaction forces will occur, and due to this imbalance, a rotational moment will be generated in the main tube (210) around the support ring (250) attached to the second frame part (460), and rotation may occur.

[0066] When the main tube (210) rotates, the intended direction of air discharge is inevitably changed by adjusting the extension direction of the branch tube (220), so a weight (260) is installed as a rotation suppression structure to maintain the state in which the main tube (210) was initially installed.

[0067] As described above, the weight (260) is installed at the bottom of the main tube (210), and since the center of gravity of the main tube (210) is shifted downward by the weight (260), even if the amount of air discharged around the main tube (210) becomes unbalanced, the main tube (210) does not rotate around the support ring (250) and can maintain the initial installation state.

[0068] In addition, as shown in FIG. 9, the air duct (200) may be provided with a distance adjustment part (270) so that the weight (260) can be adjusted to a distance from the center of the main tube (210) according to the air pressure inside the main tube (210).

[0069] The above distance adjustment unit (270) includes a distance adjustment tube (271) extending downward from the main tube (210), a lifting plate (272) installed to be vertically movable inside the distance adjustment tube (271), a spring elastically supporting the lifting plate (272) upward, and a connecting member (274) extending from the lifting plate (272) and connected to a weight (260).

[0070] When the internal pressure of the main tube (210) increases, the discharge speed of the air discharged through the branch tube (220) increases, and the rotational moment generated in the main tube (210) also increases. Therefore, if the connection position of the weight (260) is moved further downward from the center of the main tube (210), the rotation of the main tube (210) can be prevented more effectively.

[0071] When the internal pressure of the main tube (210) increases, the spring supporting the lifting plate (272), which is installed to be vertically movable along the longitudinal direction of the distance adjustment tube (271), is compressed, causing the lifting plate (272) to descend, and the weight (260) connected to the lifting plate (272) moves further away from the main tube (210), so that the mounting position of the weight (260) can be automatically adjusted according to the pressure of the main tube (210).

[0072] In addition, if the weight (260) is exposed to the outside or if a separate identification mark is installed so that the downward length of the weight (260) can be identified from the outside, the manager may easily recognize the internal pressure of the main tube (210) depending on whether the weight (260) is lowered or the downward distance.

[0073] The local cooling air conditioning system (10) for an air house according to the present invention described above can move the air duct (200) up and down or left and right along the width direction so as to supply air to a point where local cooling is required, thereby enabling local cooling and allowing the direction of air supply to be easily adjusted and maintained.

[0075] The description of the presented embodiments is provided so that any person skilled in the art may use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not limited to the embodiments presented herein, but should be interpreted in the broadest possible scope consistent with the principles and novel features presented herein. Explanation of the symbols

[0076] 1: Airhouse 2: Outdoor house 3: Indoor house 4: Machine room 10: Local cooling HVAC system for airhouses 100: Blower 110: Blower body 111: Inlet 112: Air vent 120: Blower fan 130: Blower motor 200: Air duct 210: Main tube 220: Branch tube 221: Exhaust port 230: Check valve 231: Partition plate 232: Pass-through hole 233: Valve Seat 240: Check valve 241: Valve box 242: Blocking member 243: Valve spring 250: Jjigigori 260: Weight 270: Distance adjustment unit 271: Distance control tube 272: Lifting plate 273: Spring 274: Connecting member 300: Heat exchange section 310: Underground pipe 320: Heat exchanger 400: Duct transfer unit 410: 1st Support Unit 420: 2nd Support Unit 430: 1st elevator drive unit 440: 2nd elevator drive unit 450: 1st Frame Section 460: 2nd Frame Section 470: Width-direction drive unit 471: Rack 472: Pinion missing 473: 1st moving motor 474: Level sensor 480: 2nd move motor

Claims

Claim 1 A local cooling air conditioning system for an air house that supplies air to an air house comprising an inner house that expands by air injected into it to form a predetermined internal space, and an outer house that can cover the exterior of the inner house, the system comprises: a blower that supplies air so that the internal pressure of the inner house can be maintained relatively higher than atmospheric pressure; an air duct that provides an air passage to supply air discharged through the blower to an internal area of ​​the inner house and has a plurality of exhaust holes formed at predetermined intervals along the longitudinal direction; a heat exchanger installed in the air passage between the blower and the air duct where heat exchange is performed to control the temperature of the air supplied through the blower; and a duct moving unit that moves the air duct so that air is discharged to a point inside the inner house where local cooling is to be performed. The air duct includes a main tube having a predetermined passage and one end connected to communicate with the blower's air outlet, and a discharge section branching from the main tube and forming the exhaust holes. A branch tube is provided, and a check valve is formed at the end of the branch tube to open and close an exhaust port, wherein the check valve is formed to open when the internal pressure of the main tube exceeds a set level, and the duct moving unit comprises a first support member and a second support member installed at each end of the inner house, a first lifting drive member and a second lifting drive member installed to be vertically movable at the first support member and the second support member, respectively, and both ends are connected to the first lifting drive member and the second lifting drive member, respectively, so that vertical lifting is driven by the first lifting drive member, and includes a guide frame to which the main tube is connected, wherein the guide frame includes a first frame part in the shape of a square frame extending along the width and length direction of the inner house, and a plurality of second frame parts extending parallel to the first frame part along the length direction to which the main tube is connected.A local cooling air conditioning system for an air house, characterized in that the second frame part is connected to the first frame part by a width-direction drive part so as to be movable a predetermined distance along the width direction of the first frame part, wherein the width-direction drive part includes a rack extending along the width direction of the inner house on the upper surface of one side and the other side frame member extending along the width direction of the first frame part, a pinion member engaged with the rack, and a first moving motor that drives the pinion member, wherein the first lifting drive part and the second lifting drive part are equipped with a level sensor including a laser pointer, and the lifting height is adjusted to match between the first support part and the second support part by the level sensor, wherein the main tube is formed with a plurality of support hooks that can be attached to the second frame part and spaced apart at a predetermined interval along the length direction, and a weight is installed at the bottom of the main tube so that the main tube maintains a constant direction even during air discharge. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A local cooling air conditioning system for an air house according to claim 1, further comprising a distance adjustment unit that allows the distance at which the weight is separated from the center of the main tube to be adjusted according to the air pressure inside the main tube, wherein the distance adjustment unit comprises a distance adjustment tube extending downward from the main tube, a lifting plate installed inside the distance adjustment tube so as to be vertically movable along the longitudinal direction of the distance adjustment tube, a spring elastically supporting the lifting plate upward inside the distance adjustment tube, and a connecting member extending from the lifting plate and connected to the weight, wherein the position of the weight is adjusted as the lifting plate moves away from the center of the main tube according to the internal pressure of the main tube.

Images