Air conditioner

Abstract

The present invention relates to an air conditioner. The air conditioner, according to an embodiment of the present invention, may comprise a plurality of cycle units in which a refrigerant circulates to dehumidify air. At least one of the plurality of cycle units may include: an outdoor unit having a compressor and an outdoor heat exchanger; and an air treatment device having heat exchangers fluidically connected to the outdoor unit to recover heat or perform cooling dehumidification.

Description

air conditioner

[0001] The present invention relates to an air conditioning device.

[0002] An air conditioner is a device that maintains the air in a given space at the most suitable condition for its intended use or purpose. Typically, the air conditioner includes a compressor, a condenser, an expansion device, and an evaporator, and operates a refrigeration cycle that compresses, condenses, expands, and evaporates a refrigerant, thereby cooling or heating the space.

[0003] The above-mentioned designated space may be proposed in various ways depending on the location where the air conditioner is used. For example, if the air conditioner is placed in a home or office, the above-mentioned designated space may be an indoor space of the home or building.

[0004] When an air conditioner performs cooling operation, the outdoor heat exchanger provided in the outdoor unit functions as a condenser, and the indoor heat exchanger provided in the indoor unit functions as an evaporator. On the other hand, when the air conditioner performs heating operation, the indoor heat exchanger functions as a condenser, and the outdoor heat exchanger functions as an evaporator.

[0005] Air conditioning units can be used as industrial air conditioning equipment. Typically, low-humidity air conditioning equipment used in industrial settings utilizes refrigerant or chilled water coils for primary cooling and dehumidification, followed by a dehumidifying rotor for secondary dehumidification to reduce the absolute humidity to the target level.

[0006] In addition, secondary cooling dehumidification is performed using a refrigerant or cold water coil to reduce the air temperature that has risen due to the high temperature during regeneration of the dehumidifying rotor back to the target level.

[0007] When operating the cooling cycle to perform the first and second cooling and dehumidification processes described above, high-temperature waste heat can be generated in the radiator, waste heat is also generated in the air discharged for ventilation, and a large amount of waste heat is also discharged through the exhaust after the dehumidifying rotor regenerates. This waste heat discharge increases energy consumption and reduces the operating efficiency of the device.

[0008] The purpose of the present invention is to provide an air conditioning device having a plurality of cycle sections capable of supplying dehumidified air to an indoor space.

[0009] The purpose of the present invention is to provide an air conditioning device including an air treatment device having a plurality of outdoor units for driving the plurality of cycle units, and a heat exchanger connected to the plurality of outdoor units, and capable of treating air flowing within a flow path.

[0010] The purpose of the present invention is to provide an air conditioning device having a heat recovery coil as a heat exchanger capable of recovering waste heat generated while operating a plurality of cycle units.

[0011] The purpose of the present invention is to provide an air conditioning device having a regeneration coil as a heat exchanger for performing regeneration of a dehumidifying rotor by using waste heat generated while operating a plurality of cycle units.

[0012] The purpose of the present invention is to provide an air conditioning device capable of improving dehumidification performance or heating efficiency by arranging a heat exchange coil as a heat exchanger for cooling, dehumidification, or heating in a supply side passage section.

[0013] The purpose of the present invention is to provide an air conditioning device that arranges a plurality of heat exchange coils and can selectively operate some or all of the heat exchange coils among the plurality of heat exchange coils depending on the operation mode.

[0014] The purpose of the present invention is to provide an air conditioning device having a first flow path (supply air flow path) in which a plurality of heat exchange coils and dehumidifying rotors can be arranged to introduce outside air and dehumidify or increase the temperature of the introduced outside air.

[0015] The present invention aims to provide an air conditioning device having a second flow path (regeneration flow path) that forms a flow path for introducing outside air and regenerating a dehumidifying rotor using the introduced outside air.

[0016] The purpose of the present invention is to provide an air conditioning device capable of recovering air heat by installing a bypass flow path between the first flow path and the second flow path and allowing air to bypass between the flow paths through the bypass flow path.

[0017] The purpose of the present invention is to provide an air conditioning device that can reduce the load of a regeneration heater by providing a high-temperature extraction device that operates a cascade cycle between an outdoor unit and an air treatment device to raise the regeneration temperature of a dehumidifying rotor to a high temperature.

[0018] The purpose of the present invention is to provide an air conditioning device capable of increasing the operating efficiency of a high-temperature extraction device by providing an intermediate heat exchanger capable of heat exchange between two refrigerants in the high-temperature extraction device.

[0019] An air conditioning device according to an embodiment of the present invention may include a plurality of cycle sections through which a refrigerant circulates to dehumidify air.

[0020] At least one of the above-described plurality of cycle units may include an outdoor unit equipped with a compressor and an outdoor heat exchanger, and an air treatment device equipped with a heat exchanger fluidly connected to the outdoor unit to recover heat or perform cooling and dehumidification.

[0021] The above outdoor unit includes a plurality of outdoor units, and the plurality of outdoor units can be selectively operated in cooling mode or heating mode.

[0022] The air treatment device includes a flow path forming an air path, and the heat exchanger can be installed on the path of the flow path.

[0023] The above heat exchanger may include a heat exchange coil that is fluidly connected to the outdoor unit and acts as a cooling and dehumidifying coil capable of cooling and dehumidifying air flowing through the flow path through heat absorption.

[0024] The above cooling and dehumidifying coil can be installed in the first flow passage that introduces outside air and supplies it to the room.

[0025] The above cycle unit may further include a high-temperature extraction device including an intermediate heat exchanger that exchanges heat with the refrigerant circulating in the outdoor unit.

[0026] The intermediate heat exchanger can perform heat exchange between the first refrigerant and the second refrigerant so that the above high temperature extraction device can form a cascade cycle.

[0027] The first refrigerant may be a refrigerant circulating in the outdoor unit, and the second refrigerant may be a refrigerant passing through an intermediate compressor provided in the high-temperature extraction device.

[0028] A dehumidifying rotor for dehumidifying the air supplied to the room may be installed in the above-mentioned euro section.

[0029] The dehumidification area of ​​the dehumidification rotor is arranged in the first flow path, and the regeneration area of ​​the dehumidification rotor is installed in the second flow path, so that dehumidification and regeneration operation of the dehumidification rotor can be easily performed.

[0030] A first regeneration coil may be installed in the second section as a heat exchanger to which compressed refrigerant from the intermediate compressor is introduced to generate regeneration heat.

[0031] A regeneration heater for regeneration of the dehumidifying rotor may be installed in the second euro section.

[0032] In the second section, a heat recovery coil is arranged at the outlet of the regeneration side area of ​​the dehumidifying rotor to evaporate using the high-temperature waste heat exhausted after regeneration of the dehumidifying rotor, so that the operating efficiency of the high-temperature extraction device can be improved.

[0033] The above cycle section includes a second regeneration coil into which high-pressure refrigerant compressed by the compressor of the outdoor unit is introduced, thereby contributing to the temperature increase of the outside air introduced from the outside, which can be used as regeneration heat of the dehumidifying rotor.

[0034] The above second regeneration coil is installed in the second section and can be placed on the inlet side of the dehumidifying rotor.

[0035] The above air treatment device may include a first flow path in which a plurality of heat exchange coils and dehumidifying rotors as cooling dehumidifying coils for introducing outside air and dehumidifying the introduced outside air can be arranged in a set operation mode.

[0036] The above air treatment device may include a first flow path in which a heat exchange coil as a heating coil for introducing outside air and heating the introduced outside air may be arranged in a set operation mode.

[0037] The above air treatment device may include a second flow path that forms a flow path for introducing outside air and regenerating a dehumidifying rotor using the introduced outside air.

[0038] The air treatment device may include a bypass duct that connects the first flow path and the second flow path so that air flowing through one of the first and second flow paths can be bypassed to the other flow path to recover heat.

[0039] In one aspect of the present invention, an air conditioner may include a first outdoor unit including a first compressor and a first outdoor heat exchanger; a second outdoor unit including a second compressor and a second outdoor heat exchanger; a third outdoor unit including a third compressor and a third outdoor heat exchanger; and an air treatment device having a passage section in which a heat exchanger fluidly connected to the first to third outdoor units and a dehumidifying rotor for dehumidifying air are installed.

[0040] The above-mentioned flow path may include a first flow path in which at least one heat exchange coil is arranged to introduce outside air and supply it indoors and exchange heat with the introduced outside air; and a second flow path in which at least one regeneration coil is arranged to introduce outside air and provide regeneration heat of the dehumidifying rotor.

[0041] It is characterized in that the dehumidification area of ​​the dehumidification rotor is arranged in the first flow section, and the regeneration area of ​​the dehumidification rotor is arranged in the second flow section.

[0042] The above heat exchange coil may include a first heat exchange coil that is fluidly connected to the first outdoor unit and provided on the inlet side of the dehumidification area of ​​the dehumidification rotor based on the air flow in the first flow path.

[0043] The first outdoor unit includes a liquid pipe that guides the liquid refrigerant condensed in the first outdoor heat exchanger, and the liquid pipe can be connected to the inlet side of the first heat exchange coil to introduce the liquid refrigerant into the first heat exchange coil.

[0044] The system further includes a first coil expansion device installed in the liquid pipe to depressurize the liquid refrigerant, and the first heat exchange coil may be arranged on the outlet side of the first coil expansion device to evaporate the depressurized refrigerant in the first coil expansion device.

[0045] The above heat exchange coil may include a second heat exchange coil that is fluidly connected to the third outdoor unit and provided on the outlet side of the dehumidifying area of ​​the dehumidifying rotor based on the air flow in the first flow path.

[0046] The third outdoor unit includes a liquid pipe that guides the liquid refrigerant condensed in the third outdoor heat exchanger, and the liquid pipe can be connected to the inlet side of the second heat exchange coil to introduce the liquid refrigerant into the second heat exchange coil.

[0047] The system further includes a second coil expansion device installed in the liquid pipe to depressurize the liquid refrigerant, and the second heat exchange coil may be arranged on the outlet side of the second coil expansion device to evaporate the depressurized refrigerant in the second coil expansion device.

[0048] The second outdoor unit further includes a high-temperature extraction device that forms a cycle of a second refrigerant that exchanges heat with the first refrigerant flowing therethrough, and the high-temperature extraction device may include an intermediate compressor for compressing the second refrigerant and an intermediate heat exchanger for heat exchange between the first and second refrigerants.

[0049] The condensation temperature of the second refrigerant may be higher than the condensation temperature of the first refrigerant, and the evaporation temperature of the second refrigerant may be higher than the evaporation temperature of the first refrigerant.

[0050] The above regeneration coil may include a first regeneration coil that is fluidly connected to the intermediate compressor and provided at the inlet side of the regeneration area of ​​the dehumidifying rotor based on the air flow in the second flow path.

[0051] The above regeneration coil may include a second regeneration coil that is fluidly connected to the first outdoor unit and provided at the inlet side of the regeneration area of ​​the dehumidifying rotor based on the air flow in the second flow path.

[0052] The air conditioner may further include a liquid pipe including a branch section for delivering liquid refrigerant condensed in the first outdoor heat exchanger to the heat exchange coil; and a coil outlet pipe connected to the branch section of the liquid pipe and through which refrigerant condensed in the second regeneration coil flows.

[0053] The above air conditioner may further include a regeneration heater disposed in the second section and provided on one side of the regeneration coil to provide regeneration heat of the dehumidifying rotor.

[0054] The above air conditioner may further include a heat recovery coil provided in the second section and arranged on the outlet side of the dehumidifying rotor to evaporate refrigerant by exchanging heat with air passing through the dehumidifying rotor.

[0055] In another aspect of the present invention, the air conditioner may include a first outdoor unit including a first compressor and a first outdoor heat exchanger; a second outdoor unit including a second compressor and a second outdoor heat exchanger; and a third outdoor unit including a third compressor and a third outdoor heat exchanger.

[0056] The above air conditioner may further include a supply air passage section in which a first heat exchange coil fluidly connected to the first outdoor unit and a second heat exchange coil fluidly connected to the third outdoor unit are installed, and which forms a passage for supplying air to an indoor space.

[0057] The above air conditioner may further include a high-temperature extraction device having an intermediate compressor to form a cycle of a second refrigerant that exchanges heat with the first refrigerant circulating in the second outdoor unit.

[0058] The above air conditioner may include a first regeneration coil fluidly connected to the high-temperature extraction device and a second regeneration coil fluidly connected to the first outdoor unit, and may include a regeneration path forming a path for regeneration of the dehumidifying rotor.

[0059] The above dehumidifying rotor may include a dehumidifying region arranged in the air supply path to dehumidify air to be supplied to the indoor space, and a regeneration region arranged in the regeneration path to regenerate the dehumidifying rotor.

[0060] The high temperature extraction device may include a plate heat exchanger for heat-exchanging the first and second refrigerants; and a liquid separator disposed on the inlet side of the plate heat exchanger and for separating liquid refrigerant from the second refrigerant to be introduced into the intermediate heat exchanger.

[0061] The above high temperature extraction device may include a bypass pipe connected to the liquid separator and guiding the flow of the gaseous refrigerant separated from the liquid separator and bypassing the plate heat exchanger to be connected to the outlet side of the plate heat exchanger.

[0062] According to an embodiment of the present invention, an air conditioning device having a plurality of cycle sections is provided, so that air can be dehumidified and easily supplied to an indoor space.

[0063] According to an embodiment of the present invention, a plurality of outdoor units are provided for driving the plurality of cycle units, and an air treatment device is included that is fluidly connected to the plurality of outdoor units and can treat air flowing within the duct section, so that the dehumidification performance can be improved.

[0064] According to an embodiment of the present invention, a heat recovery coil as a heat exchanger is provided to recover waste heat generated while operating a plurality of cycle units, thereby reducing the energy used for operating the device.

[0065] According to an embodiment of the present invention, a regeneration coil is provided as a heat exchanger for performing regeneration of a dehumidifying rotor by utilizing waste heat generated while operating a plurality of cycle units, so that energy used for operating the device can be reduced.

[0066] According to an embodiment of the present invention, a heat exchange coil as a cooling dehumidification coil for cooling and dehumidification is arranged in the air supply side passage section, thereby improving the dehumidification performance.

[0067] According to an embodiment of the present invention, since a plurality of cooling and dehumidifying coils are arranged, and some or all of the cooling and dehumidifying coils among the plurality of cooling and dehumidifying coils can be selectively operated depending on the operation mode, optimal operation control according to external conditions can be achieved.

[0068] According to an embodiment of the present invention, a first flow path (air supply flow path) is provided in which a plurality of cooling dehumidifying coils and dehumidifying rotors can be arranged to introduce outside air and dehumidify the introduced outside air, so that dehumidifying performance can be improved.

[0069] According to an embodiment of the present invention, a second flow path (regeneration flow path) is provided that forms a flow path for introducing external air and regenerating the dehumidifying rotor using the introduced external air, so that the operating performance of the dehumidifying rotor can be improved.

[0070] According to an embodiment of the present invention, air heat can be easily recovered by installing a bypass flow path between the first flow section and the second flow section and allowing air to bypass between the flow sections through the bypass flow path.

[0071] According to an embodiment of the present invention, a high-temperature exhaust device in which a cascade cycle is operated is provided between the outdoor unit and the air treatment device, thereby reducing the load of the regeneration heater by raising the regeneration temperature of the dehumidifying rotor to a high temperature.

[0072] According to an embodiment of the present invention, an intermediate heat exchanger capable of heat exchange between two refrigerants is provided in the high-temperature extraction device, thereby increasing the operating efficiency of the high-temperature extraction device.

[0073] Figure 1 is a cycle diagram showing the configuration of an air conditioning device according to an embodiment of the present invention.

[0074] Figure 2 is a cycle diagram showing the operation of the first mode of an air conditioning device according to an embodiment of the present invention.

[0075] Figure 3 is a cycle diagram showing the operation of the second mode of the air conditioning device according to an embodiment of the present invention.

[0076] Figure 4 is a cycle diagram showing the operation of the third mode of the air conditioning device according to an embodiment of the present invention.

[0077] Figure 5 is a cycle diagram showing the operation of the fourth mode of the air conditioning device according to an embodiment of the present invention.

[0078] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of related known structures or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0079] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0080] Figure 1 is a cycle diagram showing the configuration of an air conditioning device according to an embodiment of the present invention.

[0081] Referring to FIG. 1, an air conditioning device (1) according to an embodiment of the present invention may include a plurality of cycle sections (1a, 1b, 1c) forming a cycle in which a refrigerant circulates.

[0082] The above multiple cycle parts (1a, 1b, 1c) may include a first cycle part (1a), a second cycle part (1b), and a third cycle part (1c).

[0083] The first cycle section (1a) may include a first outdoor unit (10). The second cycle section (1b) may include a second outdoor unit (20). The third cycle section (1c) may include a third outdoor unit (30).

[0084] The above air conditioning device (1) may include an air treatment device (70) for dehumidifying air supplied indoors using the heat sources of the plurality of cycle units (1a, 1b, 1c). The air treatment device (70) may be called an air handling unit (AHU).

[0085] The air treatment device (70) may include a flow path (80, 95) that forms an air flow path. The flow path (80, 95) defines an air flow path formed inside the air treatment device (70), and a plurality of heat exchangers and dehumidifying rotors, etc. may be installed in the path of the flow path (80, 95).

[0086] The above-mentioned flow path may include a first flow path (80) that introduces outside air, dehumidifies the introduced outside air, and then supplies the air to the room. The first flow path (80) may be called a “supply air flow path.”

[0087] One end of the first flow path (80) may form a first outside air introduction portion (81) into which outside air is introduced. The other end of the first flow path (80) may form an indoor supply portion (82) that removes moisture contained in the outside air or processes the air to increase its temperature before supplying it indoors.

[0088] A first fan (83) may be installed in the first flow path (80) to generate air flow passing through the first flow path (80). For example, the first fan (83) may be installed adjacent to and inside the indoor supply section (82).

[0089] Inside the first section (80), a plurality of heat exchangers constituting at least one of the first to third cycle sections (1a, 1b, 1c) may be installed.

[0090] For example, the plurality of heat exchangers may include a first heat exchange coil (261) constituting the first cycle section (1a). The plurality of heat exchangers may include a second heat exchange coil (461) constituting the third cycle section (1c).

[0091] The above-mentioned flow path may include a second flow path (95) that introduces outside air, processes the introduced outside air, and then exhausts the outside air. The second flow path (95) may be called a “regeneration flow path.”

[0092] One end of the second flow path (95) may form a second outside air introduction portion (96) into which outside air is introduced. The other end of the third flow path (95) may form an exhaust portion (97) that performs regeneration of the dehumidifying rotor (160) using the introduced outside air and then exhausts the regenerated air to the outside.

[0093] A second fan (98) may be installed in the second flow path (95) to generate air flow passing through the second flow path (95). For example, the second fan (98) may be installed adjacent to and inside the exhaust part (97).

[0094] A heat exchanger constituting the second cycle section (1b) may be installed inside the second flow section (95). For example, the heat exchanger may include a first regeneration coil (140) and a heat recovery coil (170).

[0095] A heat exchanger constituting the first cycle section (1a) may be installed inside the second flow section (95). For example, the heat exchanger may include a second regeneration coil (141).

[0096] The second cycle section (1b) may include a high-temperature extraction device (100) for supplying regeneration heat to the air flowing through the second flow path (95). The high-temperature extraction device (100) circulates a second refrigerant that exchanges heat with the first refrigerant circulating through the second outdoor unit (20), and supplies high-pressure refrigerant to the first regeneration coil (140) to condense the refrigerant in the first regeneration coil (140). Therefore, the temperature of the air passing through the first regeneration coil (140) may rise so as to regenerate the dehumidifying rotor.

[0097] Below, the detailed configuration of the first to third cycle sections (1a, 1b, 1c) is described with reference to the drawings.

[0098] A first cycle unit (1a) according to an embodiment of the present invention may include a first outdoor unit (10) through which refrigerant circulates. The first outdoor unit (10) may include a first compressor (210) for compressing the refrigerant to a high pressure. A first accumulator (205) may be installed on the suction side of the first compressor (210) to separate the gaseous refrigerant from the low-pressure refrigerant and guide it to the first compressor (210).

[0099] The above first outdoor unit (10) is installed on the outlet side of the first compressor (210) and may include a flow control valve (220, 222) that controls the flow direction of the high-temperature, high-pressure refrigerant discharged from the first compressor (210) and flows therein.

[0100] The above flow control valve (220, 222) may include a first valve (220) and a second valve (222). For example, the first and second valves (220, 222) may include a four-way valve.

[0101] The above first and second valves (220, 222) can be configured so that three of the four ports are open and connected to the refrigerant pipe, and the remaining one port is closed.

[0102] A discharge pipe (212) is connected to the outlet of the first compressor (210), and the discharge pipe (212) can be connected to a valve connection pipe (224) that connects the first valve (220) and the second valve (222).

[0103] In detail, the valve connection pipe (224) includes a joint portion (224a), and the discharge pipe (212) can be connected to the joint portion (224a). The refrigerant of the discharge pipe (212) flows into the valve connection pipe (224) through the joint portion (224a), and can be branched into the first and second valves (220, 222) and flowed into the second valve (222).

[0104] For example, when the first outdoor unit (10) is operated in cooling mode, some of the refrigerant flowing into the valve connection pipe (224) may flow into the first outdoor heat exchanger (230) through the first valve (220). The remaining refrigerant may flow into the second regeneration coil (141) through the second valve (222).

[0105] A first outdoor fan that blows air to the first outdoor heat exchanger (230) may be provided on one side of the first outdoor heat exchanger (230).

[0106] The above first outdoor unit (10) may include a heat exchanger connecting pipe (226) extending from the first valve (220) to the first outdoor heat exchanger (230).

[0107] The first outdoor unit (10) may include a high-pressure engine (227) connected to the second valve (222). High-pressure gaseous refrigerant flows through the high-pressure engine (227), and may extend to the outside of the first outdoor unit (10) and be connected to a second regeneration coil (141).

[0108] The first outdoor unit (10) may include a first outdoor heat exchanger (230). In the cooling mode of the first outdoor unit (10), the refrigerant compressed in the first compressor (210) may be condensed in the first outdoor heat exchanger (230). That is, the first outdoor heat exchanger (230) may function as a condenser.

[0109] On the other hand, in the heating mode of the first outdoor unit (10), the refrigerant introduced into the first outdoor unit (10) is depressurized in the outdoor expansion valve (234) and then introduced into the first outdoor heat exchanger (230), and can be evaporated while passing through the first outdoor heat exchanger (230). That is, the first outdoor heat exchanger (230) can function as an evaporator.

[0110] Based on the cooling mode of the first outdoor unit (10), a liquid pipe (235) may be connected to the outlet side of the first outdoor heat exchanger (230). Liquid refrigerant flows in the liquid pipe (235), and may extend to the outside of the first outdoor unit (10) and be connected to the first heat exchange coil (261).

[0111] An outdoor expansion valve (234) may be installed in the above liquid pipe (235). The outdoor expansion valve (234) may be configured as, for example, an electronic expansion valve (EEV) whose opening can be adjusted to reduce the pressure of the refrigerant.

[0112] The first outdoor unit (10) may include a low-pressure engine (264) connected to the inlet side of the first accumulator (205). A low-pressure gaseous refrigerant flows through the low-pressure engine (264), and may extend to the outside of the first outdoor unit (10) and be connected to the first heat exchange coil (261).

[0113] The first cycle section (1a) may include a first heat exchange coil (261) connected to the liquid pipe (235). The liquid pipe (235) may be connected to the first outdoor heat exchanger (230) to guide the refrigerant condensed in the first outdoor heat exchanger (230) to the first heat exchange coil (261).

[0114] The above first heat exchange coil (261) is installed in the first flow path (80) and operates in a specific mode (the first and second modes described later) to cool the outside air introduced from the first outside air introduction section (81) and remove moisture (functions as a cooling dehumidifying coil).

[0115] The above liquid pipe (235) forms a branch portion (235a), and a coil outlet pipe (146) provided on the outlet side of the second regeneration coil (141) can be connected to the branch portion (235a).

[0116] For example, in the first mode of operation, the refrigerant condensed in the second regeneration coil (141) may flow through the coil outlet pipe (146) and be combined with the refrigerant in the liquid pipe (235) through the branch portion (235a). The refrigerant combined in the branch portion (235a) may be introduced into the first heat exchange coil (261).

[0117] A first coil expansion valve (236) may be installed in the above liquid pipe (235). The first coil expansion valve (236) is provided on the inlet side of the first heat exchange coil (261) and can reduce the pressure of the refrigerant to be introduced into the first heat exchange coil (261).

[0118] The above first coil expansion valve (236) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted, for example, to reduce the pressure of the refrigerant. The refrigerant reduced in pressure by the first coil expansion valve (236) may flow into the first heat exchange coil (261) and evaporate.

[0119] The first heat exchange coil (261) may be connected to a low pressure engine (264). Therefore, the refrigerant evaporated in the first heat exchange coil (261) may flow through the low pressure engine (264) and be introduced into the first outdoor unit (10).

[0120] In detail, the low pressure organ (264) may extend into the interior of the first outdoor unit (10) and be connected to the inlet side of the first accumulator (205). Among the low pressure refrigerants introduced into the first accumulator (205) from the low pressure organ (264), the gaseous refrigerant may be sucked into the first compressor (210).

[0121] In this way, in the first cycle section (1a), refrigerant circulation can be performed to drive the first heat exchange coil (261) to cool and dehumidify the air inside the first flow section (80).

[0122] A second cycle unit (1b) according to an embodiment of the present invention may include a second outdoor unit (20) through which refrigerant circulates. The second outdoor unit (20) may include a second compressor (310) for compressing the refrigerant to a high pressure. A second accumulator (305) may be installed on the suction side of the second compressor (310) to separate the gaseous refrigerant from the low-pressure refrigerant and guide it to the second compressor (210).

[0123] The second outdoor unit (20) is installed on the outlet side of the second compressor (210) and may include a flow control valve (320, 322) that controls the flow direction of the high-temperature, high-pressure refrigerant discharged from the second compressor (210) and flows therein.

[0124] The above flow control valve (320, 322) may include a first valve (320) and a second valve (322). For example, the first and second valves (320, 322) may include a four-way valve.

[0125] The first valve (320) may be configured such that three of its four ports are open and connected to the refrigerant pipe, and the remaining one port is closed. The second valve (322) may be configured such that two of its four ports are open and connected to the refrigerant pipe, and the remaining two ports are closed.

[0126] A discharge pipe (312) is connected to the outlet of the second compressor (310), and the discharge pipe (312) can be connected to a valve connection pipe (324) that connects the first valve (320) and the second valve (322).

[0127] In detail, the valve connection pipe (324) includes a joint portion (324a), and the discharge pipe (312) can be connected to the joint portion (324a). The refrigerant of the discharge pipe (312) flows into the valve connection pipe (324) through the joint portion (324a), and can be branched into the first and second valves (320, 322) and flowed into the second valve (322).

[0128] For example, when the second outdoor unit (20) is operated in cooling mode, some of the refrigerant flowing into the valve connection pipe (324) may flow into the second outdoor heat exchanger (330) through the first valve (320). The remaining refrigerant may flow into the second heat recovery device (50) through the second valve (322).

[0129] A second outdoor fan that blows air to the second outdoor heat exchanger (330) may be provided on one side of the second outdoor heat exchanger (330).

[0130] The second outdoor unit (20) may include a heat exchanger connecting pipe (326) extending from the first valve (320) to the second outdoor heat exchanger (330).

[0131] The second outdoor unit (20) may include a high-pressure organ (327) connected to the second valve (322). High-pressure gaseous refrigerant flows through the high-pressure organ (327), and may extend to the outside of the second outdoor unit (20) and be connected to the intermediate heat exchanger (130) of the high-temperature extraction device (100).

[0132] The second outdoor unit (20) may include a second outdoor heat exchanger (330). In the cooling mode of the second outdoor unit (20), the refrigerant compressed in the second compressor (310) may be condensed in the second outdoor heat exchanger (330). That is, the second outdoor heat exchanger (330) may function as a condenser.

[0133] On the other hand, in the heating mode of the second outdoor unit (20), the refrigerant introduced into the second outdoor unit (20) is depressurized in the outdoor expansion valve (334) and then introduced into the second outdoor heat exchanger (330), and can be evaporated while passing through the second outdoor heat exchanger (330). That is, the second outdoor heat exchanger (330) can function as an evaporator.

[0134] Based on the cooling mode of the second outdoor unit (20), a liquid pipe (335) may be connected to the outlet side of the second outdoor heat exchanger (330). Liquid refrigerant flows through the liquid pipe (335), and may extend to the outside of the second outdoor unit (20) and be connected to the outlet side of the intermediate heat exchanger (130).

[0135] An outdoor expansion valve (334) may be installed in the above liquid pipe (335). The outdoor expansion valve (334) may be configured as, for example, an electronic expansion valve (EEV) whose opening can be adjusted to reduce the pressure of the refrigerant.

[0136] Based on the heating mode of the second outdoor unit (20), the refrigerant compressed in the second compressor (310) may be introduced into the intermediate heat exchanger (130) of the high-temperature extraction device (100) via the high-pressure engine (327) and condensed. That is, the intermediate heat exchanger (130) may function as a condenser.

[0137] The above intermediate heat exchanger (130) can be understood as a refrigerant-refrigerant heat exchanger that allows heat exchange between the first refrigerant circulating through the second outdoor unit (20) and the second refrigerant circulating through the high-temperature extraction device (100).

[0138] For example, the intermediate heat exchanger (130) may be configured as a plate heat exchanger. That is, a plurality of first flow paths through which the first refrigerant flows and a plurality of second flow paths through which the second refrigerant flows are arranged alternately, and heat exchange can occur between these first and second flow paths.

[0139] The first refrigerant and the second refrigerant may be composed of different refrigerants. For example, the first refrigerant may be R410A and the second refrigerant may be R134a.

[0140] The condensation temperature of the first refrigerant may be approximately 45°C, and the evaporation temperature may be approximately 6°C. On the other hand, the condensation temperature of the second refrigerant may be approximately 80°C, and the evaporation temperature may be approximately 40°C.

[0141] Due to the characteristics of the refrigerant, the first refrigerant may have high density and high efficiency. Therefore, by using the first refrigerant as the refrigerant flowing through the first to third outdoor units (10, 20, 30), a compact configuration of the outdoor units is possible, while improving cycle performance.

[0142] The second refrigerant, although relatively low in efficiency, has a high saturation temperature at the same pressure, thereby helping to provide regenerative heat to the dehumidifying rotor. Therefore, the second refrigerant can be used as the refrigerant circulating in the high-temperature extraction device (100).

[0143] In the intermediate heat exchanger (130), the temperature of the first refrigerant flowing through the high-pressure engine (327) may be formed higher than the temperature of the low-temperature, low-pressure second refrigerant discharged from the liquid separator (120). Therefore, during the heat exchange process in the intermediate heat exchanger (130), the first refrigerant may be condensed and the second refrigerant may be evaporated.

[0144] The liquid pipe (335) is connected to the outlet side of the intermediate heat exchanger (130), and the first refrigerant condensed in the intermediate heat exchanger (130) can flow through the liquid pipe (335).

[0145] An expansion valve (329) may be installed in the portion of the above liquid pipe (335) that is connected to the outlet side of the intermediate heat exchanger (130). The expansion valve (329) may be configured as an electronic expansion valve (EEV).

[0146] In the heating mode of the second outdoor unit (20), the expansion valve (329) can be fully opened so that the first refrigerant is not depressurized. The first refrigerant that has passed through the expansion valve (329) flows into the interior of the second outdoor unit (20), is depressurized in the outdoor expansion valve (334), and can then be evaporated in the second outdoor heat exchanger (330).

[0147] The first refrigerant evaporated in the second outdoor heat exchanger (330) flows into the second accumulator (305) via the first valve (320), and the gaseous refrigerant separated in the second accumulator (305) can be sucked into the second compressor (310).

[0148] The above high temperature extraction device (100) may include an intermediate compressor (110) for compressing a second refrigerant. A discharge pipe (112) extending to a first regeneration coil (140) is installed on the outlet side of the intermediate compressor (110).

[0149] A check valve (113) may be installed in the discharge pipe (112) to prevent reverse flow of refrigerant. The check valve (113) may be configured to secure the reliability of the compressor by blocking the liquid refrigerant from flowing back from the first regeneration coil (140) into the intermediate compressor (110) when the intermediate compressor (110) is stopped.

[0150] The second refrigerant compressed in the intermediate compressor (110) may be introduced into the first regeneration coil (140) through the discharge pipe (112). The first regeneration coil (140) may be understood as a heat exchanger installed in the second flow path (95) and providing regeneration heat of the dehumidifying rotor (160).

[0151] During the process of the second refrigerant condensing in the first regeneration coil (140), heat is dissipated, and the air flowing through the second flow path (95) can be heated and raised in temperature.

[0152] A coil outlet pipe (142) may be connected to the outlet side of the first regeneration coil (140). The liquid refrigerant condensed in the first regeneration coil (140) may flow through the coil outlet pipe (142).

[0153] A first intermediate expansion device (145) may be installed in the coil outlet pipe (142). The refrigerant flowing in the coil outlet pipe (142) may be decompressed to a low pressure in the first intermediate expansion device (145) and introduced into the liquid separator (120). The liquid separator (120) may be connected to the outlet end of the coil outlet pipe (142).

[0154] The above liquid separator (120) can be understood as a configuration for separating liquid refrigerant from among refrigerants and supplying the separated liquid refrigerant to the intermediate heat exchanger (130). The intermediate heat exchanger (130) can be connected to the outlet side of the liquid separator (120).

[0155] The advantages of the above liquid separator (120) are as follows.

[0156] First, by minimizing the gaseous refrigerant before the second refrigerant is introduced into the intermediate heat exchanger (130) and introducing mainly liquid refrigerant into the intermediate heat exchanger (130), the refrigerant can be evenly distributed to a number of passages within the intermediate heat exchanger (130), thereby improving heat transfer performance.

[0157] Second, by minimizing the inlet enthalpy of the intermediate heat exchanger (130) and maximizing the evaporation enthalpy difference in the intermediate heat exchanger (130), the cooling capacity can be improved.

[0158] Third, the performance of the cycle can be improved by reducing the gaseous refrigerant flowing into the intermediate heat exchanger (130) and minimizing the pressure loss in the intermediate heat exchanger (130).

[0159] The internal volume of the liquid separator (120) may be formed to be smaller than the internal volume of the regenerative coil (140). For example, the internal volume of the liquid separator (120) may be formed in a range of 20 to 40% of the internal volume of the regenerative coil (140).

[0160] When the cycle unit (1a) is stopped or in the initial state of starting, the refrigerant charge distributed in the refrigerant pipe may be unstable, and when the cycle unit starts to operate in this state, the refrigerant amount may be concentrated toward the low pressure side, which may cause the compressor to suck in liquid refrigerant. In order to prevent this problem, the internal volume of the liquid separator (120) may be formed small so that it can act as a buffer for the refrigerant flow.

[0161] The liquid refrigerant separated in the liquid separator (120) is evaporated in the intermediate heat exchanger (130), and can be introduced into the intermediate accumulator (105) and then sucked into the intermediate compressor (110).

[0162] The liquid separator (120) may be connected to a bypass pipe (180) through which the gaseous refrigerant separated from the liquid separator (120) is discharged. For example, the bypass pipe (180) may be connected to the upper portion of the liquid separator (120), and a pipe through which the liquid refrigerant separated from the liquid separator (120) is discharged may be connected to the lower portion of the liquid separator (120).

[0163] One end of the above bypass pipe (180) can be connected to the liquid separator (120), and the other end can be connected to the outlet pipe of the intermediate heat exchanger (130), i.e., the inlet pipe of the intermediate accumulator (105).

[0164] Accordingly, the second refrigerant that has been heat-exchanged in the intermediate heat exchanger (130) and the second refrigerant that has been bypassed through the bypass pipe (180) are combined in the outlet pipe of the intermediate heat exchanger (130), and the combined second refrigerant can be introduced into the intermediate accumulator (105).

[0165] The diameter of the bypass pipe (180) may be formed smaller than the diameter of the coil outlet pipe (142) and the diameter of the liquid refrigerant outlet pipe of the liquid separator (120). For example, the diameter of the bypass pipe (180) may be formed at a level of 50 to 60% of the diameter of the coil outlet pipe (142) or the diameter of the liquid refrigerant outlet pipe of the liquid separator (120).

[0166] According to this configuration, the amount of refrigerant bypassed through the bypass pipe (180) can be limited to a certain level or less, and the diameter of the bypass pipe (180) can be prevented from being too large, preventing liquid refrigerant from flowing into the bypass pipe (180).

[0167] A bypass valve (182) for controlling the discharge amount of the gaseous refrigerant may be installed in the bypass pipe (180). The bypass pipe (180) is connected to the intermediate accumulator (105), and the gaseous refrigerant flowing through the bypass pipe (180) may be introduced into the intermediate accumulator (105) and sucked into the intermediate compressor (110).

[0168] A coil-side branch portion (142a) may be formed in the coil outlet pipe (142). A coil-side branch pipe (143) is connected to the coil-side branch portion (142a), and the coil-side branch pipe (143) may extend from the coil-side branch portion (142a) to the heat recovery coil (170).

[0169] A coil-side expansion valve (144) may be installed in the coil-side branch pipe (143). The coil-side expansion valve (144) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted to reduce the pressure of the refrigerant. The coil-side expansion valve (144) may be provided at the inlet side of the heat recovery coil (170).

[0170] Some of the refrigerant condensed in the first regeneration coil (140) may be depressurized in the first intermediate expansion device (145) and introduced into the liquid separator (120). The remaining refrigerant may be introduced into the coil-side branch pipe (143) and depressurized in the coil-side expansion valve (144) and introduced into the heat recovery coil (170).

[0171] The above heat recovery coil (170) may be installed in the second flow path (95). For example, the heat recovery coil (170) may be placed on the outlet side of the dehumidifying rotor (160) based on the air flow.

[0172] The above second refrigerant is evaporated in the heat recovery coil (170), and during the evaporation process, the temperature of the air flowing through the second flow path (95) can decrease.

[0173] In this way, by arranging a heat recovery coil (170) inside the second flow path (95) and using the waste heat of indoor air exhausted through the second flow path (95) to evaporate the refrigerant of the heat recovery coil (170), the operating performance of the cycle can be improved.

[0174] A coil-side low-pressure pipe (172) is connected to the outlet side of the heat recovery coil (170), and the refrigerant evaporated in the heat recovery coil (170) can be introduced into the intermediate accumulator (105) through the coil-side low-pressure pipe (172) and sucked into the intermediate compressor (110).

[0175] The above air conditioner (1) may further include a dehumidifying rotor (160) provided to dehumidify air flowing through the first flow path (80).

[0176] The above dehumidifying rotor (160) may include a dehumidifying area (dehumidifying part) arranged in the first flow path (80) and a regeneration area (regeneration part) arranged in the second flow path (95).

[0177] For example, the dehumidifying rotor (160) is provided to be rotatable around a central axis, and the positions of the dehumidifying region and the regeneration region can be switched. For example, a motor and a belt are included as a mechanism for driving the dehumidifying rotor (160), and the belt is connected to the central axis of the dehumidifying rotor to rotate the dehumidifying rotor (160).

[0178] When moisture is filtered in the dehumidification area located in the first flow path (80) for a predetermined period of time, the dehumidification rotor (160) rotates, and the dehumidification area is located in the second flow path (95) so that regeneration can take place. In addition, the regeneration area located in the second flow path (95) can be located in the first flow path (80) so that dehumidification can be performed.

[0179] A regeneration heater (150) for regeneration of the dehumidifying rotor (160) may be installed in the second flow path (95). The regeneration heater (150) may be configured to supply regeneration heat to the dehumidifying rotor (160). For example, the regeneration heater (150) may be placed on the inlet side of the dehumidifying rotor (160) based on the air flow.

[0180] A first regeneration coil (140) may be installed on the inlet side of the above-mentioned regeneration heater (150). Accordingly, the air flowing through the second flow path (95) is first heated while passing through the first regeneration coil (140) and is additionally heated in the regeneration heater (150) to regenerate the regeneration area of ​​the dehumidifying rotor (160).

[0181] And, the heat recovery coil (170) is placed on the outlet side of the dehumidifying rotor (160), and the refrigerant of the heat recovery coil (170) can be evaporated using the air that has passed through the dehumidifying rotor (160).

[0182] The third cycle unit (1c) according to an embodiment of the present invention may include a third outdoor unit (30) through which refrigerant circulates. The third outdoor unit (30) may include a third compressor (410) for compressing the refrigerant to a high pressure. A third accumulator (405) may be installed on the suction side of the third compressor (410) to separate the gaseous refrigerant from the low-pressure refrigerant and guide it to the third compressor (410).

[0183] The third outdoor unit (30) is installed on the outlet side of the third compressor (410) and may include a flow control valve (420) that controls the flow direction of the high-temperature, high-pressure refrigerant discharged from the third compressor (410) and flows therein. For example, the flow control valve (420) may include a four-way valve.

[0184] A discharge pipe (412) is connected to the outlet of the third compressor (410), and the discharge pipe (412) can be connected to the flow control valve (420).

[0185] The third outdoor unit (30) may include an organ (464) extending from the flow control valve (420) to the second heat exchange coil (461).

[0186] When the third outdoor unit (30) is operated in heating mode, high-pressure gaseous refrigerant compressed in the third compressor (410) can flow through the engine (464). The engine (464) can extend to the outside of the third outdoor unit (30) and be connected to the second heat exchange coil (461). That is, the engine (464) can function as a high-pressure engine.

[0187] On the other hand, when the third outdoor unit (30) is operated in cooling mode, low-pressure gaseous refrigerant evaporated in the second heat exchange coil (461) can flow through the engine (464). The engine (464) can extend to the third outdoor unit (30) and be connected to the inlet side of the third accumulator (405) via the flow control valve (420). That is, the engine (464) can function as a low-pressure engine.

[0188] The third outdoor unit (30) may include a heat exchanger connection pipe (426) extending from the flow control valve (420) to the third outdoor heat exchanger (430).

[0189] The third outdoor unit (30) may include a third outdoor heat exchanger (430). In the cooling mode of the third outdoor unit (30), the refrigerant compressed in the third compressor (410) may pass through the flow control valve (420) and be condensed in the third outdoor heat exchanger (430). That is, the third outdoor heat exchanger (430) may function as a condenser.

[0190] A third outdoor fan that blows air to the third outdoor heat exchanger (430) may be provided on one side of the third outdoor heat exchanger (430).

[0191] On the other hand, in the heating mode of the third outdoor unit (30), the refrigerant flowing into the third outdoor unit (30) from the second heat exchange coil (461) is depressurized in the outdoor expansion valve (434) and then flows into the third outdoor heat exchanger (430), and can be evaporated while passing through the third outdoor heat exchanger (430). That is, the third outdoor heat exchanger (430) can function as an evaporator.

[0192] Based on the cooling mode of the third outdoor unit (30), a liquid pipe (435) may be connected to the outlet side of the third outdoor heat exchanger (430). Liquid refrigerant flows in the liquid pipe (435), and may extend to the outside of the third outdoor unit (30) and be connected to the second heat exchange coil (461).

[0193] An outdoor expansion valve (434) may be installed in the above liquid pipe (435). The outdoor expansion valve (434) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted for reducing the pressure of the refrigerant, for example.

[0194] The third cycle section (1c) may include a second heat exchange coil (461) connected to the liquid pipe (435). The second heat exchange coil (461) is installed in the first flow path section (80) and can cool the air dehumidified in the dehumidifying rotor (160) in the first mode of the air conditioning device (1) to remove moisture.

[0195] The above second heat exchange coil (461) can be placed on the outlet side of the dehumidifying rotor (160) within the first flow path (80).

[0196] On the inlet side of the second heat exchange coil (461), a second coil expansion valve (436) may be installed to reduce the pressure of the refrigerant to be introduced into the second heat exchange coil (461) based on the cooling mode. The second coil expansion valve (436) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted, for example, to reduce the pressure of the refrigerant.

[0197] In the cooling mode of the third outdoor unit (30), the refrigerant depressurized in the second coil expansion valve (436) can flow into the second heat exchange coil (461) and evaporate.

[0198] The second heat exchange coil (461) may be connected to the engine (464). Therefore, the refrigerant evaporated in the second heat exchange coil (461) may flow through the engine (464) and be introduced into the third outdoor unit (30).

[0199] The above-mentioned organ (464) may extend into the interior of the third outdoor unit (30) and be connected to the inlet side of the third accumulator (405) via the flow control valve (420). Among the low-pressure refrigerant flowing into the third accumulator (405) from the organ (464), the gaseous refrigerant may be sucked into the third compressor (410).

[0200] On the other hand, in the heating mode of the third outdoor unit (30), a reverse cycle can be driven compared to the cooling mode of the third outdoor unit (30). That is, the refrigerant compressed in the third compressor (410) can be condensed in the second heat exchange coil (461). Accordingly, the air flowing in the first flow path (80) can be heated as it passes through the second heat exchange coil (461).

[0201] The refrigerant condensed in the second heat exchange coil (461) can be evaporated in the third outdoor heat exchanger (430) after being depressurized in the outdoor expansion valve (434). Then, the evaporated refrigerant can be introduced into the third accumulator (405) via the flow control valve (420). Among the low-pressure refrigerant introduced into the third accumulator (405) from the engine (464), the gaseous refrigerant can be sucked into the third compressor (410).

[0202] In this way, in the third cycle section (1c), refrigerant circulation can be performed to drive the second heat exchange coil (461) to cool, dehumidify, or heat (heat) the air inside the first flow section (80).

[0203] The above air treatment device (70) may include a bypass duct (86) connecting the first flow path (80) and the second flow path (95). A bypass fan (86a) may be installed in the bypass duct (86).

[0204] The above bypass duct (86) can bypass air from the inlet side of the second heat exchange coil (461) arranged in the first flow path (80) to the second flow path (95) based on the air flow.

[0205] When the bypass fan (86a) is driven in a specific mode of the air conditioning device, at least a portion of the air (relatively high temperature air) flowing through the first flow path (80) is bypassed to the second flow path (95), thereby helping to increase the temperature of the air in the second flow path (95).

[0206] Figure 2 is a cycle diagram showing the operation of the first mode of an air conditioning device according to an embodiment of the present invention.

[0207] Referring to FIG. 2, the air conditioning device (1) according to an embodiment of the present invention can be operated in a first mode. The first mode can be understood as a mode in which the device operates under conditions in which the outside temperature is relatively high. For example, the first mode can be operated in the summer or inter-seasonal period when the outside temperature is approximately 10°C or higher, and the first mode can be referred to as a "summer mode."

[0208] In the above first mode, the first outdoor unit (10) of the first cycle unit (1a) and the third outdoor unit (30) of the third cycle unit (1c) can be operated in cooling mode. On the other hand, the second outdoor unit (20) of the second cycle unit (1b) can be operated in heating mode.

[0209] First, in the first cycle section (1a), when the first compressor (210) of the first outdoor unit (10) is driven, at least a portion of the refrigerant compressed in the first compressor (210) flows into the first outdoor heat exchanger (230) through the first valve (220), and the refrigerant condensed in the first outdoor heat exchanger (230) can flow into the first heat exchange coil (261) through the liquid pipe (235).

[0210] The refrigerant in the above liquid pipe (235) is depressurized in the first coil expansion valve (236) provided on the inlet side of the first heat exchange coil (261), and the depressurized refrigerant can be evaporated in the first heat exchange coil (261).

[0211] The refrigerant evaporated in the first heat exchange coil (261) flows through the low pressure engine (264), flows into the first outdoor unit (10), passes through the first accumulator (205), and can then be sucked into the first compressor (210).

[0212] Meanwhile, another portion of the refrigerant compressed in the first compressor (210) may flow through the high-pressure engine (227) via the second valve (222) and may be introduced into the second regeneration coil (141) arranged in the second flow path (95). The refrigerant is condensed in the second regeneration coil (141), and the condensed refrigerant may flow through the coil outlet pipe (146) and be combined with the liquid pipe (235) via the branch portion (235a).

[0213] The refrigerant combined in the above liquid pipe (235) is depressurized in the first coil expansion valve (236) as described above, evaporates in the first heat exchange coil (261), flows to the first outdoor unit (10), passes through the first accumulator (205), and can be sucked into the first compressor (210).

[0214] Next, in the second cycle section (1b), the second outdoor unit (20) can be operated in heating mode.

[0215] When the second compressor (310) of the second outdoor unit (20) is driven, the first refrigerant compressed in the second compressor (310) can flow through the high pressure engine (227) via the second valve (322) and be introduced into the intermediate heat exchanger (130). The first refrigerant is condensed in the intermediate heat exchanger (130), and the condensed first refrigerant can flow through the liquid pipe (335) connected to the outlet side of the intermediate heat exchanger (130).

[0216] The expansion valve (329) installed in the above liquid pipe (335) can be fully opened to guide the passage of refrigerant. The first refrigerant in the liquid pipe (335) can be introduced into the second outdoor unit (20), decompressed in the outdoor expansion valve (334), and then evaporated in the second outdoor heat exchanger (330). The evaporated refrigerant can pass through the first valve (320) and the second accumulator (305) and then be sucked into the second compressor (310).

[0217] Meanwhile, the second refrigerant compressed in the intermediate compressor (110) of the high-temperature extraction device (100) flows through the discharge pipe (112) and passes through the check valve (113) to the first regeneration coil (140) where it can be condensed.

[0218] The air in the second passage (95) passing through the first regeneration coil (140) can be heated and used as regeneration heat for the dehumidifying rotor (160). That is, the air that has been heated for the first time while passing through the second regeneration coil (141) can be heated for the second time while passing through the first regeneration coil (140).

[0219] Some of the second refrigerant condensed in the first regeneration coil (140) flows through the coil outlet pipe (142) and can be introduced into the liquid separator (120) after being depressurized in the first intermediate expansion device (145).

[0220] The liquid refrigerant separated in the liquid separator (120) flows into the intermediate heat exchanger (130) and can be evaporated by exchanging heat with the first refrigerant in the intermediate heat exchanger (130). The evaporated second refrigerant can be sucked into the intermediate compressor (110) through the intermediate accumulator (105).

[0221] The gaseous refrigerant separated in the liquid separator (120) can flow through the bypass pipe (180), bypass the intermediate heat exchanger (130), and flow into the intermediate accumulator (105).

[0222] Meanwhile, another portion of the second refrigerant condensed in the first regeneration coil (140) may flow through the coil-side branch pipe (143) in the coil-side branch portion (142a) and, after being depressurized in the coil-side expansion valve (144), may be introduced into the heat recovery coil (170).

[0223] Based on the air flow in the second flow path (95), the heat recovery coil (170) is placed on the outlet side of the dehumidifying rotor (160), so that heat exchange can occur between the air used for regeneration in the dehumidifying rotor (160) and the second refrigerant in the heat recovery coil (170). Through the heat exchange, the second refrigerant can be evaporated.

[0224] The above-mentioned evaporated second refrigerant can pass through the intermediate accumulator (105) via the coil-side low-pressure pipe (172) and be sucked into the intermediate compressor (110).

[0225] Meanwhile, if a failure occurs in the second outdoor unit (20), the operation of the second compressor (310) may be stopped. Accordingly, heat exchange between the first and second refrigerants in the intermediate heat exchanger (130) may not occur. In addition, the first intermediate expansion device (145), the bypass valve (182), and the expansion valve (329) may be closed.

[0226] However, the intermediate compressor (110) of the high-temperature extraction device (100) is driven, and the second refrigerant compressed in the intermediate compressor (110) passes through the discharge pipe (112) to be condensed in the first regeneration coil (140) and then flows into the heat recovery coil (170) to be evaporated. The evaporated second refrigerant can be sucked into the intermediate compressor (110) through the intermediate accumulator (105).

[0227] The dehumidification area of ​​the dehumidification rotor (160) may be arranged in the first flow path (80) and on the outlet side of the first heat exchange coil (261). Accordingly, the air cooled and dehumidified in the first heat exchange coil (261) may be further dehumidified as it passes through the dehumidification area of ​​the dehumidification rotor (160).

[0228] The regeneration area of ​​the dehumidifying rotor (160) is arranged in the second flow path (90) and can be regenerated by air flowing through the second flow path (95). A regeneration heater (150) is installed at the inlet side of the dehumidifying rotor (160) to heat the air, and the heated air can be used for regeneration by acting on the regeneration area of ​​the dehumidifying rotor (160).

[0229] Based on the air flow, the regenerative heater (150) is placed between the first regenerative coil (140) and the dehumidifying rotor (160), and the air that has been first heated in the first regenerative coil (140) can be secondarily heated while passing through the regenerative heater (150). By this configuration, the regeneration efficiency can be improved.

[0230] Next, in the third cycle section (1b), the third outdoor unit (30) can be operated in cooling mode. When the third compressor (410) of the third outdoor unit (30) is driven, the refrigerant compressed in the third compressor (410) flows into the third outdoor heat exchanger (430) through the flow control valve (420), and the refrigerant condensed in the third outdoor heat exchanger (430) can flow into the second heat exchange coil (461) through the liquid pipe (435).

[0231] The above condensed refrigerant is depressurized in the second coil expansion valve (436) provided on the inlet side of the second heat exchange coil (461) and then flows into the second heat exchange coil (461) to evaporate.

[0232] The refrigerant evaporated in the second heat exchange coil (461) flows through the engine (464) and flows into the third outdoor unit (30), passes through the flow control valve (420) and the third accumulator (405), and can then be sucked into the third compressor (410).

[0233] Meanwhile, when the bypass fan (86a) is driven, at least a portion of the low-humidity air flowing through the first flow path (80) can flow into the second flow path (90) through the bypass duct (86) and into the second regeneration coil (141).

[0234] Describes air flow.

[0235] The outside air introduced from the first outside air introduction section (81) of the first flow path (80) is cooled and dehumidified as it passes through the first heat exchange coil (261), and can be additionally dehumidified for the first time as it passes through the dehumidification area of ​​the dehumidification rotor (160). In addition, the air can be additionally cooled and dehumidified for the second time as it passes through the second heat exchange coil (461). The additionally cooled and dehumidified air can be supplied to the room through the indoor supply section (82) via the first fan (83).

[0236] The outside air introduced from the second outside air introduction section (96) of the second flow path (95) may be heated for the first time while passing through the second regeneration coil (141) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time may be heated for the third time while passing through the regeneration heater (150) and regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0237] The air that has undergone the above regeneration is cooled as it passes through the heat recovery coil (170), passes through the third fan (98), and can then be discharged to the outside through the exhaust port (97).

[0238] Figure 3 is a cycle diagram showing the operation of the second mode of the air conditioning device according to an embodiment of the present invention.

[0239] Referring to FIG. 3, the air conditioning device (10) according to an embodiment of the present invention can be operated in a second mode. The second mode can be understood as a mode in which the device operates under conditions in which the outside temperature and humidity are relatively low. For example, the second mode can be operated in winter when the outside temperature is in the range of approximately 4 to 10°C, and the second mode can be referred to as a "general winter mode."

[0240] First, in the second mode, the first cycle section (1a) can be operated in heating mode.

[0241] In detail, when the first compressor (210) of the first outdoor unit (10) is driven, the refrigerant compressed in the first compressor (210) can flow through the high-pressure engine (227) via the second valve (222) and be introduced into the second regeneration coil (141). The refrigerant is condensed in the second regeneration coil (141), and the condensed refrigerant can flow through the coil outlet pipe (146).

[0242] Some of the refrigerant in the coil outlet pipe (146) may be branched off at the branch section (235a) and flow into the first heat exchange coil (261). At this time, the refrigerant may be depressurized at the first coil expansion valve (236) and then flow into the first heat exchange coil (261) to evaporate.

[0243] The refrigerant evaporated in the first heat exchange coil (261) can flow to the first outdoor unit (10), pass through the first accumulator (205), and be sucked into the first compressor (210).

[0244] The remaining refrigerant in the above coil outlet pipe (146) can be branched off at the branch section (235a) and flow into the first outdoor heat exchanger (230). At this time, the refrigerant can be depressurized at the outdoor expansion valve (234) and then flow into the first outdoor heat exchanger (230) to evaporate.

[0245] The refrigerant evaporated in the first outdoor heat exchanger (230) can pass through the first valve (220) and the first accumulator (205) and be sucked into the first compressor (210).

[0246] According to this configuration, the evaporation heat generated during cooling and dehumidification in the first heat exchange coil (261) and the evaporation heat in the first outdoor heat exchanger (230) can be reused to increase the regeneration temperature of the dehumidification rotor (160), thereby reducing the electricity usage of the regeneration heater (150).

[0247] Next, in the second cycle section (1b), the second outdoor unit (20) can be operated in heating mode. The operation of the second cycle section (1b) in the second mode is similar to the operation of the second cycle section (1b) in the first mode.

[0248] That is, when the second compressor (310) of the second outdoor unit (20) is driven, the first refrigerant compressed in the second compressor (310) can flow through the high-pressure engine (227) via the second valve (322) and be introduced into the intermediate heat exchanger (130). The first refrigerant is condensed in the intermediate heat exchanger (130), and the condensed first refrigerant can flow through the liquid pipe (335) connected to the outlet side of the intermediate heat exchanger (130).

[0249] The first refrigerant of the above liquid pipe (335) may be introduced into the second outdoor unit (20), depressurized in the outdoor expansion valve (334), and then evaporated in the second outdoor heat exchanger (330). The evaporated refrigerant may pass through the first valve (320) and the second accumulator (305) and then be sucked into the second compressor (310).

[0250] Meanwhile, the second refrigerant compressed in the intermediate compressor (110) of the high-temperature extraction device (100) flows through the discharge pipe (112) and passes through the check valve (113) into the first regeneration coil (140) to be condensed. The air in the second flow path (95) passing through the first regeneration coil (140) is heated and can be utilized as regeneration heat of the dehumidifying rotor (160).

[0251] Some of the second refrigerant condensed in the first regeneration coil (140) flows through the coil outlet pipe (142) and can be introduced into the liquid separator (120) after being depressurized in the first intermediate expansion device (145).

[0252] The liquid refrigerant separated in the liquid separator (120) flows into the intermediate heat exchanger (130) and can be evaporated by exchanging heat with the first refrigerant in the intermediate heat exchanger (130). The evaporated second refrigerant can be sucked into the intermediate compressor (110) through the intermediate accumulator (105).

[0253] The gaseous refrigerant separated in the liquid separator (120) can flow through the bypass pipe (180), bypass the intermediate heat exchanger (130), and flow into the intermediate accumulator (105).

[0254] Meanwhile, another portion of the second refrigerant condensed in the first regeneration coil (140) flows through the coil-side branch pipe (143) in the coil-side branch section (142a), is depressurized in the coil-side expansion valve (144), and then flows into the heat recovery coil (170) to evaporate.

[0255] The above-mentioned evaporated second refrigerant can pass through the intermediate accumulator (105) via the coil-side low-pressure pipe (172) and be sucked into the intermediate compressor (110).

[0256] Next, in the third cycle section (1c), the third outdoor unit (30) can be operated in cooling mode. The operation of the third cycle section (1c) in the second mode is similar to the operation of the third cycle section (1c) in the first mode.

[0257] In detail, when the third compressor (410) of the third outdoor unit (30) is driven, the refrigerant compressed in the third compressor (410) flows into the third outdoor heat exchanger (430) through the flow control valve (420), and the refrigerant condensed in the third outdoor heat exchanger (430) flows into the second heat exchange coil (461) through the liquid pipe (435).

[0258] The above condensed refrigerant is depressurized in the second coil expansion valve (436) provided on the inlet side of the second heat exchange coil (461) and then flows into the second heat exchange coil (461) to evaporate.

[0259] The refrigerant evaporated in the second heat exchange coil (461) flows through the engine (464) and flows into the third outdoor unit (30), passes through the flow control valve (420) and the third accumulator (405), and can then be sucked into the third compressor (410).

[0260] Meanwhile, when the bypass fan (86a) is driven, at least a portion of the low-humidity air flowing through the first flow path (80) can flow into the second flow path (90) through the bypass duct (86) and into the second regeneration coil (141).

[0261] Describes air flow.

[0262] The outside air introduced from the first outside air introduction section (81) of the first flow path (80) is cooled and dehumidified as it passes through the first heat exchange coil (261), and can be additionally dehumidified for the first time as it passes through the dehumidification area of ​​the dehumidification rotor (160). In addition, the air can be additionally cooled and dehumidified for the second time as it passes through the second heat exchange coil (461). The additionally cooled and dehumidified air can be supplied to the room through the indoor supply section (82) via the first fan (83).

[0263] The outside air introduced from the second outside air introduction section (96) of the second flow path (95) may be heated for the first time while passing through the second regeneration coil (141) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time may be heated for the third time while passing through the regeneration heater (150) and regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0264] The air that has undergone the above regeneration is cooled as it passes through the heat recovery coil (170), passes through the third fan (98), and can then be discharged to the outside through the exhaust port (97).

[0265] Figure 4 is a cycle diagram showing the operation of the third mode of the air conditioning device according to an embodiment of the present invention.

[0266] Referring to FIG. 4, the air conditioning device (10) according to an embodiment of the present invention can be operated in a third mode. The third mode can be understood as a mode that operates under conditions of low outdoor temperature and humidity. For example, the third mode can be operated during low-temperature winter when the outdoor temperature is approximately -8°C or higher and below 4°C, and the third mode can be referred to as a "low-temperature winter mode."

[0267] In the low-temperature winter season mentioned above, the outside temperature is low, but the humidity is relatively not high, so the dehumidification load may not be large.

[0268] In the third mode, the first outdoor unit (10) of the first cycle unit (1a) and the second outdoor unit (20) of the second cycle unit (1b) perform heating mode, and the third outdoor unit (30) of the third cycle unit (1c) can be stopped.

[0269] First, in the third mode, the first outdoor unit (10) of the first cycle section (1a) can perform heating operation.

[0270] In detail, when the first compressor (210) of the first outdoor unit (10) is driven, the refrigerant compressed in the first compressor (210) can flow through the high-pressure engine (227) via the second valve (222) and be introduced into the second regeneration coil (141). The refrigerant is condensed in the second regeneration coil (141), and the condensed refrigerant can flow through the coil outlet pipe (146).

[0271] The refrigerant in the above coil outlet pipe (146) flows into the liquid pipe from the branch section (235a) and can flow into the first outdoor heat exchanger (230). At this time, the refrigerant is depressurized in the outdoor expansion valve (234) and then flows into the first outdoor heat exchanger (230) and can evaporate.

[0272] The refrigerant evaporated in the first outdoor heat exchanger (230) can pass through the first valve (220) and the first accumulator (205) and be sucked into the first compressor (210).

[0273] Meanwhile, since the first coil expansion valve (236) is closed, the refrigerant may be restricted from flowing into the first heat exchange coil (261) from the branch section (235a). Accordingly, refrigerant evaporation in the first heat exchange coil (261) and cooling and dehumidification of the air flowing through the first flow path (80) do not occur.

[0274] However, since the dehumidification load of the outside air is not large in the low-temperature winter season, even if the first heat exchange coil (261) is stopped, the dehumidification efficiency of the air conditioner (1) is not significantly affected and the cycle performance can be improved.

[0275] Next, in the second cycle section (1b), the second outdoor unit (20) can be operated in heating mode. The operation of the second cycle section (1b) in the third mode is similar to the operation of the second cycle section (1b) in the first mode.

[0276] In detail, when the second compressor (310) of the second outdoor unit (20) is driven, the first refrigerant compressed in the second compressor (310) can flow through the high-pressure engine (227) via the second valve (322) and be introduced into the intermediate heat exchanger (130). The first refrigerant is condensed in the intermediate heat exchanger (130), and the condensed first refrigerant can flow through the liquid pipe (335) connected to the outlet side of the intermediate heat exchanger (130).

[0277] The first refrigerant of the above liquid pipe (335) may be introduced into the second outdoor unit (20), depressurized in the outdoor expansion valve (334), and then evaporated in the second outdoor heat exchanger (330). The evaporated refrigerant may pass through the first valve (320) and the second accumulator (305) and then be sucked into the second compressor (310).

[0278] Meanwhile, the second refrigerant compressed in the intermediate compressor (110) of the high-temperature extraction device (100) flows through the discharge pipe (112) and passes through the check valve (113) into the first regeneration coil (140) to be condensed. The air in the second flow path (95) passing through the first regeneration coil (140) is heated and can be utilized as regeneration heat of the dehumidifying rotor (160).

[0279] Some of the second refrigerant condensed in the first regeneration coil (140) flows through the coil outlet pipe (142) and can be introduced into the liquid separator (120) after being depressurized in the first intermediate expansion device (145).

[0280] The liquid refrigerant separated in the liquid separator (120) flows into the intermediate heat exchanger (130) and can be evaporated by exchanging heat with the first refrigerant in the intermediate heat exchanger (130). The evaporated second refrigerant can be sucked into the intermediate compressor (110) through the intermediate accumulator (105).

[0281] The gaseous refrigerant separated in the liquid separator (120) can flow through the bypass pipe (180), bypass the intermediate heat exchanger (130), and flow into the intermediate accumulator (105).

[0282] Meanwhile, another portion of the second refrigerant condensed in the first regeneration coil (140) flows through the coil-side branch pipe (143) in the coil-side branch section (142a), is depressurized in the coil-side expansion valve (144), and then flows into the heat recovery coil (170) to evaporate.

[0283] The above-mentioned evaporated second refrigerant can pass through the intermediate accumulator (105) via the coil-side low-pressure pipe (172) and be sucked into the intermediate compressor (110).

[0284] Next, in the third cycle section (1c), the third outdoor unit (30) can be stopped. Accordingly, the operation of the third compressor (310) is stopped, and no refrigerant flow occurs in the third cycle section (1c).

[0285] The above second coil expansion valve (436) is closed, and refrigerant evaporation in the second heat exchange coil (461) may not occur. Accordingly, the cooling and dehumidifying action of the air passing through the second heat exchange coil (461) may not occur.

[0286] Describes air flow.

[0287] The outside air introduced from the first outside air introduction section (81) of the first flow section (80) is dehumidified while passing through the dehumidification area of ​​the dehumidification rotor (160), and can be supplied indoors through the first fan (83) and the indoor supply section (82).

[0288] Since the first heat exchange coil (261) and the second heat exchange coil (461) are stopped, the air may not be cooled or dehumidified while passing through the first and second heat exchange coils (261, 461).

[0289] The outside air introduced from the second outside air introduction section (96) of the second flow path (95) may be heated for the first time while passing through the second regeneration coil (141) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time may be heated for the third time while passing through the regeneration heater (150) and regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0290] The air that has undergone the above regeneration is cooled as it passes through the heat recovery coil (170), passes through the third fan (98), and can then be discharged to the outside through the exhaust port (97).

[0291] Figure 5 is a cycle diagram showing the operation of the fourth mode of the air conditioning device according to an embodiment of the present invention.

[0292] Referring to FIG. 5, the air conditioning device (10) according to an embodiment of the present invention can be operated in a fourth mode. The fourth mode can be understood as a mode in which the device is operated under conditions where the outside temperature is very low and the humidity is also low. For example, the fourth mode can be operated in a temperature range where the outside temperature is below approximately -8°C, and the fourth mode can be referred to as an "ultra-low temperature winter mode."

[0293] In the above fourth mode, since it is a low humidity condition, the dehumidification load is not large and operation for heating can be performed.

[0294] In the fourth mode, the first outdoor unit (10) of the first cycle unit (1a) and the second outdoor unit (20) of the second cycle unit (1b) stop, and the third outdoor unit (30) of the third cycle unit (1c) can perform a heating mode.

[0295] In detail, since the first outdoor unit (10) of the first cycle section (1a) is stopped, the first compressor (210) is not driven, and no refrigerant flow to the second regeneration coil (141) and the first heat exchange coil (261) occurs.

[0296] Since the second outdoor unit (30) of the second cycle section (1b) is stopped, the second compressor (310) is not driven, and the first refrigerant does not flow to the intermediate heat exchanger (130).

[0297] In addition, the high temperature extraction device (100) may also be stopped. The intermediate compressor (110) is not driven, and the flow of the second refrigerant circulating through the first regeneration coil (140), heat recovery coil (170), liquid separator (120), and intermediate heat exchanger (130) does not occur.

[0298] The operation of the above-mentioned regenerative heater (150) also stops, and the operation of the second fan (98) also stops, so that air flow in the second flow path (95) may not occur. Accordingly, the dehumidifying action in the dehumidifying area of ​​the dehumidifying rotor (160) and the regenerative action in the regeneration area may not occur.

[0299] The third outdoor unit (30) of the third cycle section (1c) can perform a heating mode. Specifically, when the third compressor (410) is driven, the refrigerant compressed in the third compressor (410) passes through the flow control valve (420) and is condensed in the second heat exchange coil (461), and can flow into the third outdoor heat exchanger (430) through the liquid pipe (435).

[0300] The refrigerant is depressurized in the outdoor expansion valve (434) before flowing into the third outdoor heat exchanger (430), and the depressurized refrigerant can be evaporated in the third outdoor heat exchanger (430). The evaporated refrigerant can be introduced into the third accumulator (405) through the flow control valve (420) and sucked into the third compressor (410).

[0301] Describes air flow.

[0302] The outside air introduced from the first outside air introduction section (81) of the first flow section (80) may not be cooled or dehumidified as it passes through the stopped dehumidifying rotor (160) and the first heat exchange coil (261).

[0303] The air is heated as it passes through the second heat exchange coil (461), and the heated air can be supplied to the indoor space from the indoor supply unit (82) via the first fan (83). Therefore, heating of the indoor space can be performed.

[0304] Since the second fan (98) is stopped, air flow in the second flow path (95) may not occur.

[0305] The present invention relates to an air conditioning device, comprising a plurality of outdoor units for the operation of a plurality of cycle sections, and an air treatment device fluidly connected to the plurality of outdoor units to treat air flowing within a flow path section, thereby improving dehumidification performance. Accordingly, the invention has significant industrial applicability.

Claims

1. A first outdoor unit including a first compressor and a first outdoor heat exchanger; A second outdoor unit including a second compressor and a second outdoor heat exchanger; A third outdoor unit including a third compressor and a third outdoor heat exchanger; and An air treatment device comprising a heat exchanger fluidly connected to the first to third outdoor units and a passage section in which a dehumidifying rotor for dehumidifying air is installed, The above Euro part, A first flow section in which outside air is introduced and supplied to the interior, and at least one heat exchange coil for heat exchange with the introduced outside air is arranged; and An air conditioning device including a second section in which at least one regeneration coil is arranged to provide regeneration heat of the dehumidifying rotor by introducing outside air.

2. In paragraph 1, An air conditioning device characterized in that the dehumidification area of ​​the dehumidification rotor is arranged in the first flow section, and the regeneration area of ​​the dehumidification rotor is arranged in the second flow section.

3. In paragraph 1, The above heat exchange coil, An air conditioning device including a first heat exchange coil that is fluidly connected to the first outdoor unit and provided on the inlet side of the dehumidifying area of ​​the dehumidifying rotor based on the air flow in the first flow path.

4. In paragraph 3, An air conditioning device in which the first outdoor unit includes a liquid pipe that guides liquid refrigerant condensed in the first outdoor heat exchanger, and the liquid pipe is connected to the inlet side of the first heat exchange coil to introduce the liquid refrigerant into the first heat exchange coil.

5. In paragraph 4, An air conditioning device further comprising a first coil expansion device installed in the liquid pipe to depressurize the liquid refrigerant, wherein the first heat exchange coil is disposed on the outlet side of the first coil expansion device to evaporate the depressurized refrigerant in the first coil expansion device.

6. In paragraph 1, The above heat exchange coil, An air conditioning device including a second heat exchange coil that is fluidly connected to the third outdoor unit and provided on the outlet side of the dehumidifying area of ​​the dehumidifying rotor based on the air flow in the first flow section.

7. In paragraph 6, An air conditioning device in which the third outdoor unit includes a liquid pipe that guides the liquid refrigerant condensed in the third outdoor heat exchanger, and the liquid pipe is connected to the inlet side of the second heat exchange coil to introduce the liquid refrigerant into the second heat exchange coil.

8. In paragraph 7, An air conditioning device further comprising a second coil expansion device installed in the liquid pipe to depressurize the liquid refrigerant, wherein the second heat exchange coil is disposed on the outlet side of the second coil expansion device to evaporate the depressurized refrigerant in the second coil expansion device.

9. In paragraph 1, An air conditioning device further comprising a high-temperature extraction device that forms a cycle of a second refrigerant that exchanges heat with a first refrigerant flowing in the second outdoor unit, wherein the high-temperature extraction device includes an intermediate compressor for compressing the second refrigerant and an intermediate heat exchanger for heat exchange between the first and second refrigerants.

10. In paragraph 9, An air conditioning device wherein the condensation temperature of the second refrigerant is higher than the condensation temperature of the first refrigerant, and the evaporation temperature of the second refrigerant is higher than the evaporation temperature of the first refrigerant.

11. In paragraph 9, The above regenerative coil is, An air conditioning device including a first regeneration coil which is fluidly connected to the intermediate compressor and provided on the inlet side of the regeneration area of ​​the dehumidifying rotor based on the air flow in the second flow section.

12. In paragraph 1, The above regenerative coil is, An air conditioning device including a second regeneration coil that is fluidly connected to the first outdoor unit and provided on the inlet side of the regeneration area of ​​the dehumidifying rotor based on the air flow in the second flow section.

13. In paragraph 12, A liquid pipe that transfers the condensed liquid refrigerant from the first outdoor heat exchanger to the heat exchange coil and includes a branch section; and An air conditioning device further comprising a coil outlet pipe connected to a branch portion of the above liquid pipe and through which refrigerant condensed in the second regeneration coil flows.

14. In paragraph 1, An air conditioning device further comprising a regenerative heater disposed in the second section and provided on one side of the regenerative coil to provide regenerative heat to the dehumidifying rotor.

15. In paragraph 1, An air conditioning device further comprising a heat recovery coil provided in the second section and positioned on the outlet side of the dehumidifying rotor to evaporate refrigerant by exchanging heat with air passing through the dehumidifying rotor.

16. A first outdoor unit including a first compressor and a first outdoor heat exchanger; A second outdoor unit including a second compressor and a second outdoor heat exchanger; A third outdoor unit including a third compressor and a third outdoor heat exchanger; An air supply passage section in which a first heat exchange coil fluidly connected to the first outdoor unit and a second heat exchange coil fluidly connected to the third outdoor unit are installed and which forms a passage for supplying air to an indoor space; A high temperature extraction device having an intermediate compressor to form a cycle of a second refrigerant that exchanges heat with the first refrigerant circulating in the second outdoor unit; and An air conditioning device including a first regeneration coil fluidly connected to the high-temperature extraction device and a second regeneration coil fluidly connected to the first outdoor unit, and a regeneration path forming a path for regeneration of a dehumidifying rotor.

17. In paragraph 16, The above dehumidifying rotor, An air conditioning device including a dehumidification area arranged in the air supply passage to dehumidify air to be supplied to the indoor space and a regeneration area arranged in the regeneration passage to regenerate the dehumidification rotor.

18. In paragraph 17, The above first heat exchange coil is provided on the inlet side of the dehumidifying area of ​​the dehumidifying rotor based on the air flow in the first flow section, An air conditioning device in which the second heat exchange coil is provided on the outlet side of the dehumidifying area of ​​the dehumidifying rotor based on the air flow in the first flow section.

19. In paragraph 16, The above high temperature extraction device, A plate heat exchanger for exchanging heat between the first and second refrigerants; and An air conditioning device including a liquid separator arranged on the inlet side of the plate heat exchanger and configured to separate liquid refrigerant from the second refrigerant to be introduced into the intermediate heat exchanger.

20. In paragraph 19, The above high temperature extraction device, An air conditioning device including a bypass pipe connected to the liquid separator and guiding the flow of the gaseous refrigerant separated from the liquid separator and bypassing the plate heat exchanger to be connected to the outlet side of the plate heat exchanger.

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