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 comprise: an outdoor unit having a compressor and an outdoor heat exchanger; a heat recovery device connected to the outdoor unit; and an air treatment device having heat exchangers fluidically connected to the heat recovery device 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 present invention aims to provide an air conditioning device comprising a plurality of outdoor units for driving the plurality of cycle units, a plurality of heat recovery devices connected to the plurality of outdoor units, and an air treatment device fluidly connected to the plurality of heat recovery devices to treat 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 by arranging a coil as a heat exchanger for cooling and dehumidification (hereinafter, “cooling and dehumidification coil”) in a supply side flow path.

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

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

[0015] The purpose of the present invention is to provide an air conditioning device having a second flow path (heat recovery flow path) that introduces indoor air and forms a flow path through which heat is dissipated using the introduced indoor air.

[0016] The purpose of the present invention is to provide an air conditioning device having a third flow path (regeneration flow path) that forms a flow path for introducing outside air and regenerating a dehumidifying rotor using the introduced outside air.

[0017] 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 section and the second flow section, or between the first flow section and the third flow section, and allowing air to bypass between the flow sections through the bypass flow path.

[0018] The present invention aims to provide an air conditioning device capable of reducing the load of a regeneration heater by providing a high-temperature extraction device in which a cascade cycle is operated between a heat recovery device and an air treatment device, thereby raising the regeneration temperature of a dehumidifying rotor to a high temperature.

[0019] The present invention aims 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.

[0020] 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.

[0021] At least one of the above-described plurality of cycle units may include an air treatment device having an outdoor unit equipped with a compressor and an outdoor heat exchanger, a heat recovery device connected to the outdoor unit, and a heat exchanger fluidly connected to the heat recovery device to recover heat or perform cooling and dehumidification.

[0022] 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.

[0023] The above heat recovery device can improve condensation efficiency by including an internal heat exchanger capable of further condensing the refrigerant that has passed through the outdoor heat exchanger.

[0024] 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.

[0025] The above heat exchanger may include a first heat recovery coil that is fluidly connected to the outdoor unit and can condense high-pressure gaseous refrigerant to lower the operating high pressure of the cycle.

[0026] The above first heat recovery coil can be installed in the second passage that introduces and exhausts indoor air.

[0027] The above heat exchanger may include a cooling dehumidifying coil that is fluidly connected to the heat recovery device and can cool and dehumidify air flowing through the flow path through heat absorption.

[0028] The above cooling and dehumidifying coil can be installed in the first flow passage that introduces outside air and supplies it to the room.

[0029] The above cycle unit may further include a high-temperature extraction device including an intermediate heat exchanger that exchanges heat with the refrigerant of the heat recovery device.

[0030] 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.

[0031] The first refrigerant may be a refrigerant circulating through the heat recovery device, and the second refrigerant may be a refrigerant circulating through an intermediate compressor provided in the high-temperature extraction device.

[0032] A dehumidifying rotor for dehumidifying the air supplied to the room may be installed in the above-mentioned euro section.

[0033] 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 third flow path, so that the dehumidification and regeneration operation of the dehumidification rotor can be easily performed.

[0034] A first regeneration coil may be installed in the third section as a heat exchanger to which compressed refrigerant from the intermediate compressor is introduced to generate regeneration heat.

[0035] A regeneration heater for regeneration of the dehumidifying rotor may be installed in the third euro section.

[0036] In the third section, a second heat recovery coil is disposed at the outlet of the regeneration side area of ​​the dehumidifying rotor and evaporates 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.

[0037] 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.

[0038] The above second regeneration coil is installed in the third section and can be placed on the inlet side of the dehumidifying rotor.

[0039] The above air treatment device may include a first passage in which a plurality of cooling dehumidifying coils and dehumidifying rotors may be arranged to introduce outside air and dehumidify the introduced outside air.

[0040] The above air handling device may include a second flow path that introduces indoor air and forms a flow path through which heat is dissipated using the introduced indoor air.

[0041] The above air treatment device may include a third flow path that forms a flow path for introducing outside air and regenerating the dehumidifying rotor using the introduced outside air.

[0042] The air treatment device may include a first 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.

[0043] The air treatment device may include a second bypass duct that connects the first flow path and the third flow path so that air flowing through one of the first and third flow paths can be bypassed to the other flow path to recover heat.

[0044] In one aspect of the present invention, an air conditioning device may include an air handling device including 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 a passage section fluidly connected to the first to third outdoor units and having a plurality of heat exchangers installed therein.

[0045] The air treatment device may include a dehumidifying rotor for removing moisture from air flowing into the air treatment device and a regeneration heater for providing regeneration heat to the dehumidifying rotor.

[0046] The above plurality of heat exchangers may include a regeneration coil that provides condensation heat to increase the temperature of air passing through the regeneration heater.

[0047] It may further include a first heat recovery device that is fluidly connected to the first outdoor unit and has a first internal heat exchanger and a valve device.

[0048] The above plurality of heat exchangers may include a first heat recovery coil for recovering heat of the refrigerant compressed in the first compressor and a cooling coil that acts as an evaporator for cooling and dehumidifying air passing through the passage section.

[0049] The above-mentioned flow path includes a first flow path forming a flow path for introducing outside air and supplying it indoors, and a second flow path forming a flow path for introducing indoor air and discharging it outdoors, and the first heat recovery device may be installed in the second flow path, and the cooling coil may be installed in the first flow path.

[0050] It may further include a first coil expansion valve for reducing the pressure of some of the refrigerant condensed in the first outdoor heat exchanger and the first internal heat exchanger; and a second coil expansion valve for reducing the pressure of another part of the refrigerant condensed in the first outdoor heat exchanger and the first internal heat exchanger.

[0051] The above cooling coil may include a first cooling coil provided on the outlet side of the first coil expansion valve and a second cooling coil provided on the outlet side of the second coil expansion valve.

[0052] The second outdoor unit further includes a high-temperature extraction device that forms a cycle of a second refrigerant that exchanges heat with a cycle of a 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.

[0053] 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.

[0054] The first refrigerant may be R410a, and the second refrigerant may be R134a.

[0055] The above plurality of heat exchangers further include a first regeneration coil for condensing the high-pressure second refrigerant compressed in the intermediate compressor, and the first regeneration coil can be installed on the inlet side of the regeneration heater based on the air flow in the passage section.

[0056] The heat exchanger may further include a coil-side expansion valve for reducing the pressure of the second refrigerant condensed in the first regeneration coil, and the plurality of heat exchangers may include a second heat recovery coil that evaporates the second refrigerant reduced in pressure in the coil-side expansion valve and is arranged on the outlet side of the dehumidifying rotor based on the air flow in the passage section.

[0057] The above high temperature extraction device may include a liquid separator disposed on the inlet side of the intermediate heat exchanger and configured to separate liquid refrigerant from the second refrigerant to be introduced into the intermediate heat exchanger.

[0058] The above high temperature extraction device may include a bypass pipe connected to the liquid separator, guiding the flow of the gaseous refrigerant separated from the liquid separator and bypassing the intermediate heat exchanger to be connected to the outlet side of the intermediate heat exchanger.

[0059] The second heat recovery device may further include a second internal heat exchanger and a valve device, which is fluidly connected to the second outdoor unit, and may include a cooling coil that acts as an evaporator for cooling and dehumidifying air passing through the passage section.

[0060] It may further include a third coil expansion valve for reducing the pressure of some of the refrigerant condensed in the second outdoor heat exchanger and the second internal heat exchanger; and a fourth coil expansion valve for reducing the pressure of another part of the refrigerant condensed in the second outdoor heat exchanger and the second internal heat exchanger.

[0061] The above cooling coil may include a third cooling coil provided on the outlet side of the third coil expansion valve and a fourth cooling coil provided on the outlet side of the fourth coil expansion valve.

[0062] The third heat recovery device may further include a third internal heat exchanger and valve device, which is fluidly connected to the third outdoor unit, and may include a cooling coil that acts as an evaporator for cooling and dehumidifying air passing through the passage section.

[0063] It may further include a fifth coil expansion valve for reducing the pressure of some of the refrigerant condensed in the third outdoor heat exchanger and the third internal heat exchanger; and a sixth coil expansion valve for reducing the pressure of another part of the refrigerant condensed in the third outdoor heat exchanger and the third internal heat exchanger.

[0064] The above cooling coil may include a fifth cooling coil provided on the outlet side of the fifth coil expansion valve and a sixth cooling coil provided on the outlet side of the sixth coil expansion valve.

[0065] The above-mentioned flow path may include a first flow path that forms a supply-side flow path for introducing outside air and supplying it indoors, and in which a plurality of cooling coils and a dehumidifying region of the dehumidifying rotor are arranged; a second flow path that forms a flow path for introducing outside air and regenerating the dehumidifying rotor, and in which the regeneration coil and the regeneration region of the dehumidifying rotor are arranged; and a third flow path that forms an exhaust-side flow path for introducing indoor air and discharging it to the outside, and in which a heat recovery coil is arranged.

[0066] In another aspect of the present invention, an air conditioner may include an outdoor unit including a compressor for compressing a first refrigerant and an outdoor heat exchanger; a heat recovery unit including an internal heat exchanger for further condensing the first refrigerant condensed in the outdoor heat exchanger; and a high-temperature discharge unit including an intermediate compressor for compressing a second refrigerant and an intermediate heat exchanger for performing heat exchange between the first refrigerant discharged from the heat recovery unit and the second refrigerant.

[0067] The air conditioner may include a regeneration coil that condenses the second refrigerant compressed in the intermediate compressor; a dehumidifying rotor having a regeneration area through which air that has exchanged heat with the regeneration coil passes; and a heat recovery coil that is arranged on the outlet side of the dehumidifying rotor based on the flow of the air and is evaporated by air passing through the dehumidifying rotor.

[0068] The apparatus may further include a flow path forming an air flow path passing through the regeneration coil, the dehumidifying rotor, and the heat recovery coil; and a fan disposed in the flow path and generating air flow.

[0069] A regeneration heater may be further included, which is arranged between the regeneration coil and the dehumidifying rotor based on the flow of the air, and supplies regeneration heat to the air that has been initially heated by the regeneration coil.

[0070] Another outdoor unit having an additional compressor and an additional outdoor heat exchanger; and a plurality of cooling coils for cooling and dehumidifying air passing through a dehumidifying area of ​​the dehumidifying rotor, wherein the cooling coils can be fluidly connected to the additional compressor so that refrigerant flowing through the plurality of cooling coils is introduced into the other outdoor unit.

[0071] 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.

[0072] According to an embodiment of the present invention, a plurality of outdoor units are provided for driving the plurality of cycle units, a plurality of heat recovery devices connected to the plurality of outdoor units, and an air treatment device fluidly connected to the plurality of heat recovery devices to treat air flowing within the flow path section, so that the dehumidification performance can be improved.

[0073] 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.

[0074] 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.

[0075] According to an embodiment of the present invention, a cooling dehumidifying coil as a heat exchanger for cooling and dehumidifying is arranged in the air supply side passage section, thereby improving the dehumidifying performance.

[0076] 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.

[0077] According to an embodiment of the present invention, a supply air passage section 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.

[0078] According to an embodiment of the present invention, a regeneration flow path section is provided that introduces outside air and forms a flow path for regenerating the dehumidifying rotor using the introduced outside air, so that the operating performance of the dehumidifying rotor can be improved.

[0079] According to an embodiment of the present invention, a heat recovery path section is provided that introduces indoor air and forms a path through which heat is dissipated using the introduced indoor air, so that the operating efficiency of the cycle can be improved.

[0080] 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, or between the first flow section and the third flow section, and allowing air to bypass between the flow sections through the bypass flow path.

[0081] According to an embodiment of the present invention, a high-temperature extraction device in which a cascade cycle is operated is provided between a heat recovery device and an air treatment device, thereby increasing the regeneration temperature of a dehumidifying rotor to a high temperature, thereby reducing the load of a regeneration heater.

[0082] 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.

[0083] Figure 1 is a cycle diagram showing the configuration of an air conditioning device according to an embodiment of the present invention.

[0084] Fig. 2 is a cycle diagram showing the configuration of the first cycle section of an air conditioning device according to an embodiment of the present invention.

[0085] Figure 3 is a cycle diagram showing the configuration of the second cycle section of an air conditioning device according to an embodiment of the present invention.

[0086] Fig. 4 is a cycle diagram showing the configuration of the third cycle section of an air conditioning device according to an embodiment of the present invention.

[0087] Figure 5 is a cycle diagram showing the operation of the first mode of the air conditioning device according to an embodiment of the present invention.

[0088] Figure 6 is a cycle diagram showing the operation of the second mode of the air conditioning device according to an embodiment of the present invention.

[0089] Fig. 7 is a cycle diagram showing the operation of the third mode of the air conditioning device according to an embodiment of the present invention.

[0090] Figure 8 is a cycle diagram showing the operation of the fourth mode of the air conditioning device according to an embodiment of the present invention.

[0091] 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.

[0092] 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.

[0093] Figure 1 is a cycle diagram showing the configuration of an air conditioning device according to an embodiment of the present invention.

[0094] 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.

[0095] 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).

[0096] The first cycle unit (1a) may include a first outdoor unit (10) and a first heat recovery device (40). The second cycle unit (1b) may include a second outdoor unit (20) and a second heat recovery device (50). The third cycle unit (1c) may include a third outdoor unit (30) and a third heat recovery device (60).

[0097] 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).

[0098] The air treatment device (70) may include a flow path section (80, 90, 95) that forms an air flow path. The flow path section (80, 90, 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 section (80, 90, 95).

[0099] 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.”

[0100] One end of the first flow path (80) may form a first outdoor air introduction portion (81) into which outdoor air is introduced. The other end of the first flow path (80) may form an indoor supply portion (82) that supplies outdoor air to the room after processing it to remove moisture contained therein.

[0101] 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).

[0102] 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.

[0103] For example, the plurality of heat exchangers may include a first cooling coil (261) and a second cooling coil (262) constituting the first cycle section (1a). The first and second cooling coils (261, 262) may be referred to as first and second heat exchange coils, respectively. The first and second cooling coils (261, 262) will be described later with reference to FIG. 2.

[0104] The above-described plurality of heat exchangers may include a third cooling coil (361) and a fourth cooling coil (362) constituting the second cycle section (1b). The third and fourth cooling coils (361, 362) may be referred to as third and fourth heat exchange coils, respectively. The third and fourth cooling coils (361, 362) will be described later with reference to FIG. 3.

[0105] The above-described plurality of heat exchangers may include a fifth cooling coil (461) and a sixth cooling coil (462) constituting the third cycle section (1c). The fifth and sixth cooling coils (461, 462) may be referred to as fifth and sixth heat exchange coils, respectively. The fifth and sixth cooling coils (461, 462) will be described later with reference to FIG. 4.

[0106] The above-mentioned flow path may include a second flow path (90) that introduces indoor air, processes the introduced indoor air, and then exhausts the air to the outside. The second flow path (90) may be called a “heat recovery flow path.”

[0107] One end of the second flow path (90) may form an indoor air introduction portion (91) into which indoor air is introduced. The other end of the second flow path (90) may form a first exhaust portion (92) that uses the introduced indoor air to dissipate heat from the heat exchanger of the first cycle portion (1a) and then exhausts the heat to the outside.

[0108] A second fan (93) may be installed in the second flow path (90) to generate air flow passing through the second flow path (90). For example, the second fan (93) may be installed adjacent to and inside the indoor air introduction portion (91).

[0109] A heat exchanger constituting the first cycle section (1a) may be installed inside the second flow section (90). For example, the heat exchanger may include a first heat recovery coil (251) constituting the first cycle section (1a). The first heat recovery coil (251) will be described later with reference to FIG. 2.

[0110] The above-mentioned flow path may include a third flow path (95) that introduces outside air, processes the introduced outside air, and then exhausts it to the outside. The third flow path (95) may be called a “regeneration flow path.”

[0111] One end of the third 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 a second exhaust portion (97) that performs regeneration of the dehumidifying rotor (160, see FIG. 3) using the introduced outside air and then exhausts the regenerated air to the outside.

[0112] A third fan (98) may be installed in the third flow path (95) to generate air flow passing through the third flow path (95). For example, the third fan (98) may be installed adjacent to and inside the second exhaust part (97).

[0113] A heat exchanger constituting the second cycle section (1b) may be installed inside the third flow section (95). For example, the heat exchanger may include a first regeneration coil (140) and a second heat recovery coil (170). The first regeneration coil (140) and the second heat recovery coil (170) will be described later with reference to FIG. 3.

[0114] A heat exchanger constituting the third cycle section (1c) may be installed inside the third flow section (95). For example, the heat exchanger may include a second regenerative coil (451). The second regenerative coil (451) will be described later with reference to FIG. 4.

[0115] The second cycle section (1b) may include a high-temperature extraction device (100) for supplying regeneration heat to the air flowing through the third flow path (95). The high-temperature extraction device (100) may circulate a second refrigerant that exchanges heat with the first refrigerant circulating through the second outdoor unit (20), and may supply high-pressure refrigerant to the first regeneration coil (140) to condense the refrigerant in the first regeneration coil (140). Accordingly, the temperature of the air passing through the first regeneration coil (140) may rise so that the dehumidifying rotor can regenerate.

[0116] Below, the detailed configuration of the first to third cycle sections (1a, 1b, 1c) is described with reference to the drawings.

[0117] Fig. 2 is a cycle diagram showing the configuration of the first cycle section of an air conditioning device according to an embodiment of the present invention. In Fig. 2, for convenience of explanation, arrows relating to the flow of refrigerant are indicated based on the first mode.

[0118] Referring to FIG. 2, the first cycle unit (1a) according to the embodiment of the present invention may include a first outdoor unit (10) through which refrigerant circulates, and a first heat recovery device (40) fluidly connected to the first outdoor unit (10) and having a first internal heat exchanger (42).

[0119] The first outdoor unit (10) may include a first compressor (210) for compressing refrigerant to high pressure. A first accumulator (205) may be installed on the suction side of the first compressor (210) to separate gaseous refrigerant from the low-pressure refrigerant and guide it to the first compressor (210).

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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).

[0124] 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).

[0125] 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 first heat recovery device (40) through the second valve (222).

[0126] 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).

[0127] 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).

[0128] The first outdoor unit (10) may include a high-pressure pipe (227) extending from the second valve (222) to the first heat recovery device (40). A high-pressure gaseous refrigerant flows through the high-pressure pipe (227), and may extend to the outside of the first outdoor unit (10) and be connected to the first heat recovery device (40).

[0129] The high pressure engine (227) is connected to the third valve (240) of the first heat recovery device (40), and can be extended from the third valve (240) and connected to the first heat recovery coil (251).

[0130] The third valve (240) may include, for example, a four-way valve. The third valve (240) may fluidly connect the outdoor unit (20) and the heat exchange coils (251, 261, 262) of the air treatment device (70) to the refrigerant.

[0131] 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.

[0132] On the other hand, in the heating mode of the first outdoor unit (10), the refrigerant flowing into the first outdoor unit (10) from the first heat recovery device (40) is depressurized in the outdoor expansion valve (234) and then flows 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.

[0133] 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). A liquid refrigerant flows through the liquid pipe (235), and may extend to the outside of the first outdoor unit (10) and be connected to the first heat recovery device (40).

[0134] 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.

[0135] The first outdoor unit (10) may include a low-pressure pipe (264) extending from the inlet side of the first accumulator (205) to the first heat recovery device (40). A low-pressure gaseous refrigerant flows through the low-pressure pipe (264), and may extend to the outside of the first outdoor unit (10) and be connected to the first heat recovery device (40).

[0136] The first outdoor unit (10) and the first heat recovery device (40) can be connected by three pipes. In detail, the first outdoor unit (10) and the first heat recovery device (40) are connected by the high pressure engine (227), the liquid pipe (235), and the low pressure engine (264), so that refrigerant can circulate between the first outdoor unit (10) and the first heat recovery device (40).

[0137] The first heat recovery device (40) may include a third valve (240) connected to the high pressure engine (227) and the low pressure engine (264). For example, the third valve (240) may include a four-way valve.

[0138] The third valve (240) can transfer the refrigerant of the high pressure engine (227) to the first heat recovery coil (251) to condense it. That is, the first heat recovery coil (251) can function as a condenser. The first heat recovery coil (251) is installed in the second flow path (90), and the air of the second flow path (90) can be heated while passing through the first heat recovery coil (251).

[0139] Ultimately, when exhausting indoor air through the second duct (90), the waste heat can be used to condense the first heat recovery coil (251), thereby improving the operating performance of the cycle.

[0140] The first heat recovery device (40) may include a first internal heat exchanger (42). The first internal heat exchanger (42) may be configured as a heat exchanger in which heat exchange occurs between refrigerants.

[0141] The first internal heat exchanger (42) may be configured to allow heat exchange between a medium-temperature, high-pressure two-phase refrigerant flowing through the liquid pipe (235) and a low-temperature refrigerant flowing through the low-pressure engine (264). In this process, the refrigerant in the liquid pipe (235) may be further condensed.

[0142] When the first cycle section (1a) is operating, at least a portion of the high-pressure refrigerant compressed in the first compressor (210) is branched to the first heat recovery coil (251) through the high-pressure engine (227), so the high pressure of the first cycle section (1a) is lowered, and thus heat dissipation in the first outdoor heat exchanger (230) may not be smooth.

[0143] In order to solve this problem, the first internal heat exchanger (42) is provided in the first heat recovery device (40) to further condense the refrigerant in the liquid pipe (235), thereby improving the condensation performance of the cycle.

[0144] The first cycle section (1a) may include a first cooling coil (261) and a second cooling coil (262) connected to the liquid pipe (235). The liquid pipe (235) may be extended from the first internal heat exchanger (42) to the first cooling coil (261) after being radiated from the first internal heat exchanger (42).

[0145] The above first and second cooling coils (261, 262) are installed in the first flow path (80) and can cool the outside air introduced from the first outside air introduction part (81) to remove moisture.

[0146] The first and second cooling coils (261, 262) may be arranged in series on the side of the air flow path of the first flow path (80). Accordingly, the air may be cooled and dehumidified while passing through the first and second cooling coils (261, 262) in sequence.

[0147] A coil outlet pipe (253) may be connected to the outlet side of the first heat recovery coil (251). In the coil outlet pipe (253), medium-temperature, high-pressure liquid refrigerant condensed in the first heat recovery coil (251) may flow.

[0148] A control valve (254) may be installed in the coil outlet pipe (253). For example, the control valve (254) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted. The opening of the control valve (254) can control the amount of refrigerant to be introduced into the first heat recovery coil (251). The amount of refrigerant to be introduced into the first outdoor heat exchanger (230) can also be controlled according to the opening of the control valve (254).

[0149] The coil outlet pipe (253) can be connected to the liquid pipe (235). In detail, the liquid pipe (235) forms a first branch portion (235a), and the coil outlet pipe (253) can be connected to the liquid pipe (235) through the first branch portion (235a).

[0150] The refrigerant of the coil outlet pipe (253) flows into the liquid pipe (235) through the first branch portion (235a), and can flow into the first cooling coil (261) by combining with the refrigerant of the liquid pipe (235). A first coil expansion valve (236) for reducing the pressure of the refrigerant to flow into the first cooling coil (261) can be installed on the inlet side of the first cooling coil (261).

[0151] The above first coil expansion valve (236) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted for reducing the pressure of the refrigerant, for example.

[0152] The above liquid pipe (235) forms a second branch portion (235b), and a liquid branch pipe (238) connected to the second branch portion (235b) and connected to the second cooling coil (262) may be provided. The above liquid branch pipe (238) may be understood as a component of the above liquid pipe (235).

[0153] At least a portion of the refrigerant in the liquid pipe (235) may flow into the liquid branch pipe (238) through the second branch portion (235b) and into the second cooling coil (262).

[0154] A second coil expansion valve (237) for reducing the pressure of the refrigerant to be introduced into the second cooling coil (262) may be installed on the inlet side of the second cooling coil (262). The second coil expansion valve (237) may be configured as, for example, an electronic expansion valve (EEV) whose opening can be adjusted for reducing the pressure of the refrigerant.

[0155] The refrigerant depressurized in the first coil expansion valve (236) can flow into the first cooling coil (261) and evaporate, and the refrigerant depressurized in the second coil expansion valve (237) can flow into the second cooling coil (262) and evaporate.

[0156] The first and second cooling coils (261, 262) may be connected to a low-pressure engine (264). Accordingly, the refrigerant evaporated in the first and second cooling coils (261, 262) may flow through the low-pressure engine (264) and flow into the first outdoor unit (10) through the first internal heat exchanger (42).

[0157] In detail, a low pressure engine (264) is connected to the outlet of the first cooling coil (261), and the low pressure engine (264) can extend through the first internal heat exchanger (42).

[0158] An engine branch pipe (266) is connected to the outlet of the second cooling coil (262), and the engine branch pipe (266) can be configured to be connected to the third valve (240) and extend from the third valve (240) to be connected to the low-pressure engine (264). The engine branch pipe (266) can be understood as a component of the low-pressure engine.

[0159] 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), gaseous refrigerant may be sucked into the first compressor (210).

[0160] In this way, in the first cycle section (1a), refrigerant circulation can be performed to drive the first and second cooling coils (261, 262) to cool and dehumidify the air inside the first flow section (80).

[0161] In addition, by arranging the first heat recovery coil (251) inside the second flow path (90) and dissipating heat from the first heat recovery coil (251) using the waste heat of indoor air exhausted through the second flow path (90), the operating pressure of the cycle can be lowered and the performance can be improved.

[0162] The above air treatment device (70) may include a bypass duct (85) connecting the first flow section (80) and the second flow section (90). A bypass fan (85a) may be installed in the bypass duct (85).

[0163] When the bypass fan (85a) is driven in a specific mode of the air conditioning device, at least a portion of the low-humidity air flowing through the second flow path (90) can be bypassed to the first flow path (80) to help cool and dehumidify the air in the first flow path (80).

[0164] Fig. 3 is a cycle diagram showing the configuration of the second cycle section of an air conditioning device according to an embodiment of the present invention. In Fig. 3, for convenience of explanation, arrows relating to the flow of refrigerant are indicated based on the first mode.

[0165] Referring to FIG. 3, the second cycle unit (1b) according to the embodiment of the present invention may include a second outdoor unit (20) through which refrigerant circulates, and a second heat recovery device (50) fluidly connected to the second outdoor unit (20) and having a second internal heat exchanger (52).

[0166] The second outdoor unit (20) may include a second compressor (310) for compressing refrigerant to high pressure. A second accumulator (305) may be installed on the suction side of the second compressor (310) to separate gaseous refrigerant from the low-pressure refrigerant and guide it to the second compressor (210).

[0167] 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.

[0168] 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.

[0169] The above first and second valves (320, 322) 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.

[0170] 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).

[0171] 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).

[0172] 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).

[0173] 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).

[0174] 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).

[0175] The second outdoor unit (20) may include a high-pressure pipe (327) extending from the second valve (322) to the second heat recovery device (50). High-pressure gaseous refrigerant flows through the high-pressure pipe (327), and may extend to the outside of the second outdoor unit (20) and be connected to the second heat recovery device (50).

[0176] The high pressure engine (327) is connected to the third valve (340) of the second heat recovery device (50), and can be extended from the third valve (340) to be connected to the intermediate heat exchanger (130) of the high temperature extraction device (100).

[0177] The third valve (340) may include, for example, a four-way valve. The third valve (340) may fluidly connect the outdoor unit (20) and the high-temperature exhaust device (100), or the outdoor unit (20) and the heat exchange coil (361, 362) of the air treatment device (70) with the refrigerant.

[0178] 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.

[0179] On the other hand, in the heating mode of the second outdoor unit (20), the refrigerant flowing into the second outdoor unit (20) from the second heat recovery device (50) is depressurized in the outdoor expansion valve (334) and then flows 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.

[0180] 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). A liquid refrigerant flows through the liquid pipe (335), and may be extended to the outside of the second outdoor unit (20) and connected to the second heat recovery device (50).

[0181] 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.

[0182] The second outdoor unit (20) may include a low-pressure pipe (364) extending from the inlet side of the second accumulator (305) to the second heat recovery device (50). A low-pressure gaseous refrigerant flows through the low-pressure pipe (364), and may extend to the outside of the second outdoor unit (20) and be connected to the second heat recovery device (50).

[0183] The second outdoor unit (20) and the second heat recovery device (50) can be connected by three pipes. In detail, the second outdoor unit (20) and the second heat recovery device (50) are connected by the high pressure engine (327), the liquid pipe (335), and the low pressure engine (364), so that refrigerant can circulate between the second outdoor unit (20) and the second heat recovery device (50).

[0184] The second heat recovery device (50) may include a second internal heat exchanger (52). The second internal heat exchanger (52) may be configured as a heat exchanger in which heat exchange occurs between refrigerants.

[0185] The second internal heat exchanger (52) may be configured to allow heat exchange between the medium-temperature, high-pressure two-phase refrigerant flowing through the liquid pipe (335) and the low-temperature refrigerant flowing through the low-pressure engine (364). In this process, the refrigerant in the liquid pipe (335) may be further condensed.

[0186] When the second cycle unit (1b) is operating, at least a portion of the high-pressure refrigerant compressed in the second compressor (310) is branched to the intermediate heat exchanger (130) through the high-pressure engine (327), so the high pressure of the second cycle unit (1b) is lowered, and thus heat dissipation in the second outdoor heat exchanger (330) may not be smooth.

[0187] To solve this problem, the second internal heat exchanger (52) is provided in the second heat recovery device (50) to further condense the refrigerant in the liquid pipe (335), thereby improving the condensation performance of the cycle.

[0188] The second heat recovery device (50) may include a third valve (340) connected to the high pressure engine (327). For example, the third valve (340) may include a four-way valve.

[0189] The third valve (340) can transfer the refrigerant of the high-pressure engine (327) to the intermediate heat exchanger (130) of the high-temperature extraction device (100) and condense it. That is, the intermediate heat exchanger (130) can function as a condenser.

[0190] 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 heat recovery device (50) and the second refrigerant circulating through the high-temperature extraction device (100).

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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).

[0196] 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.

[0197] The intermediate heat exchanger (130) may be connected to a heat exchanger outlet pipe (135) through which the heat-exchanged first refrigerant is discharged. The first refrigerant may be condensed in the intermediate heat exchanger (130) and then discharged through the heat exchanger outlet pipe (135).

[0198] An expansion valve (329) may be installed in the above heat exchanger outlet pipe (135). The expansion valve (329) may be configured as an electronic expansion valve (EEV).

[0199] The refrigerant in the liquid pipe (335) additionally condensed in the second internal heat exchanger (52) can be introduced into the third and fourth cooling coils (361, 362). That is, the second cycle section (1b) can include the third cooling coil (361) and the fourth cooling coil (362) connected to the liquid pipe (335).

[0200] The above 3rd and 4th cooling coils (361, 362) are installed in the first flow path (80) and can cool the outside air introduced from the first outside air introduction part (81) to remove moisture.

[0201] The third and fourth cooling coils (361, 362) may be arranged in series on the air flow path side of the first flow path (80). Accordingly, the air may be cooled and dehumidified while passing through the third and fourth cooling coils (361, 362) in sequence.

[0202] The above liquid pipe (335) is heat-radiated from the second internal heat exchanger (52) and can extend from the second internal heat exchanger (52) to the third cooling coil (361).

[0203] The heat exchanger outlet pipe (135) can be connected to the liquid pipe (335). In detail, the liquid pipe (235) forms a first branch portion (335a), and the heat exchanger outlet pipe (135) can be connected to the liquid pipe (335) through the first branch portion (335a).

[0204] The refrigerant of the above liquid pipe (335) and the refrigerant of the heat exchanger outlet pipe (135) can be combined at the first branch portion (335a) and introduced into the third cooling coil (361).

[0205] A third coil expansion valve (336) may be installed on the inlet side of the third cooling coil (361) to reduce the pressure of the refrigerant to be introduced into the third cooling coil (361). The third coil expansion valve (336) may be configured as, for example, an electronic expansion valve (EEV) whose opening can be adjusted to reduce the pressure of the refrigerant.

[0206] The above liquid pipe (235) forms a second branch portion (335b), and a liquid branch pipe (338) connected to the second branch portion (335b) and connected to the fourth cooling coil (362) may be provided. The above liquid branch pipe (338) may be understood as a component of the above liquid pipe (235).

[0207] At least a portion of the refrigerant in the liquid pipe (335) may flow into the liquid branch pipe (338) through the second branch portion (335b) and into the fourth cooling coil (362).

[0208] A fourth coil expansion valve (337) may be installed on the inlet side of the fourth cooling coil (362) to reduce the pressure of the refrigerant to be introduced into the fourth cooling coil (362). The fourth coil expansion valve (337) may be configured as, for example, an electronic expansion valve (EEV) whose opening can be adjusted to reduce the pressure of the refrigerant.

[0209] The refrigerant depressurized in the third coil expansion valve (336) can flow into the third cooling coil (361) and evaporate, and the refrigerant depressurized in the fourth coil expansion valve (337) can flow into the fourth cooling coil (362) and evaporate.

[0210] The third and fourth cooling coils (361, 362) may be connected to a low-pressure engine (364). Accordingly, the refrigerant evaporated in the third and fourth cooling coils (361, 362) may flow through the low-pressure engine (364) and flow into the second outdoor unit (20) through the second internal heat exchanger (52).

[0211] In detail, a low pressure engine (364) is connected to the outlet of the third cooling coil (361), and the low pressure engine (364) can extend through the second internal heat exchanger (52).

[0212] An engine branch pipe (366) is connected to the outlet of the fourth cooling coil (362), and the engine branch pipe (366) can be configured to be connected to the third valve (340) and extend from the third valve (340) to be connected to the low-pressure engine (364). The engine branch pipe (366) can be understood as a component of the low-pressure engine.

[0213] The low pressure organ (364) may extend into the interior of the second outdoor unit (20) and be connected to the inlet side of the second accumulator (305). Among the low pressure refrigerants introduced into the second accumulator (305) from the low pressure organ (364), the gaseous refrigerant may be sucked into the second compressor (310).

[0214] In this way, in the first cycle section (1b), circulation of the first refrigerant to drive the third and fourth cooling coils (361, 362) can be performed to cool the air inside the first flow section (80).

[0215] 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).

[0216] 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.

[0217] 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 third flow path (95) and providing regeneration heat of the dehumidifying rotor (160).

[0218] During the process of the second refrigerant condensing in the first regeneration coil (140), heat is dissipated, and the air flowing through the third flow path (95) can be heated and raised in temperature.

[0219] 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).

[0220] 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).

[0221] 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).

[0222] The advantages of the above liquid separator (120) are as follows.

[0223] 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.

[0224] 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.

[0225] 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).

[0226] 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).

[0227] 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).

[0228] 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).

[0229] A coil side branch portion (142a) may be formed in the above 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 second heat recovery coil (170).

[0230] 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 second heat recovery coil (170).

[0231] 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 second heat recovery coil (170).

[0232] The second heat recovery coil (170) may be installed in the third flow path (95). For example, the second heat recovery coil (170) may be placed on the outlet side of the dehumidifying rotor (160) based on the air flow.

[0233] The above second refrigerant is evaporated in the second heat recovery coil (170), and during the evaporation process, the temperature of the air flowing through the third flow path (95) may decrease.

[0234] In this way, by arranging the second heat recovery coil (170) inside the third flow path (95) and using the waste heat of indoor air exhausted through the third flow path (95) to evaporate the refrigerant of the second heat recovery coil (170), the operating performance of the cycle can be improved.

[0235] A coil-side low-pressure pipe (172) is connected to the outlet side of the second heat recovery coil (170), and the refrigerant evaporated in the second 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).

[0236] The above air conditioner (1) may further include a dehumidifying rotor (160) provided to dehumidify air flowing through the first flow path (80).

[0237] 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 third flow path (95).

[0238] 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).

[0239] 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 third flow path (95) so that regeneration can take place. In addition, the regeneration area located in the third flow path (95) can be located in the first flow path (80) so that dehumidification can be performed.

[0240] A regeneration heater (150) for regeneration of the dehumidifying rotor (160) may be installed in the third 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.

[0241] 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 third 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).

[0242] And, the second heat recovery coil (170) is placed on the outlet side of the dehumidifying rotor (160), and the refrigerant of the second heat recovery coil (170) can be evaporated using the air that has passed through the dehumidifying rotor (160).

[0243] Fig. 4 is a cycle diagram showing the configuration of the third cycle section of an air conditioning device according to an embodiment of the present invention. In Fig. 4, for convenience of explanation, arrows relating to the flow of refrigerant are indicated based on the first mode.

[0244] Referring to FIG. 4, the third cycle unit (1c) according to the embodiment of the present invention may include a third outdoor unit (30) through which refrigerant circulates, and a third heat recovery device (60) fluidly connected to the third outdoor unit (30) and having a third internal heat exchanger (62).

[0245] The third outdoor unit (30) may include a third compressor (410) for compressing refrigerant to high pressure. A third accumulator (405) may be installed on the suction side of the third compressor (410) to separate gaseous refrigerant from the low-pressure refrigerant and guide it to the third compressor (410).

[0246] The third outdoor unit (30) is installed on the outlet side of the third compressor (410) and may include a flow control valve (420, 422) that controls the flow direction of the high-temperature, high-pressure refrigerant discharged from the third compressor (410) and flows therein.

[0247] The above flow control valve (420, 422) may include a first valve (420) and a second valve (422). For example, the first and second valves (420, 422) may include a four-way valve.

[0248] The above first and second valves (420, 422) 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.

[0249] A discharge pipe (412) is connected to the outlet of the third compressor (410), and the discharge pipe (412) can be connected to a valve connection pipe (424) that connects the first valve (420) and the second valve (422).

[0250] In detail, the valve connection pipe (424) includes a joint portion (424a), and the discharge pipe (412) can be connected to the joint portion (424a). The refrigerant of the discharge pipe (412) flows into the valve connection pipe (424) through the joint portion (424a), and can be branched into the first and second valves (420, 422) and flowed into the second valve (422).

[0251] For example, when the third outdoor unit (30) is operated in cooling mode, some of the refrigerant flowing into the valve connection pipe (424) may flow into the third outdoor heat exchanger (430) through the first valve (420). The remaining refrigerant may flow into the third heat recovery device (60) through the second valve (422).

[0252] 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).

[0253] The third outdoor unit (30) may include a heat exchanger connecting pipe (426) extending from the first valve (420) to the third outdoor heat exchanger (430).

[0254] The third outdoor unit (30) may include a high-pressure pipe (427) extending from the second valve (422) to the third heat recovery device (60). High-pressure gaseous refrigerant flows through the high-pressure pipe (427), and may extend to the outside of the third outdoor unit (30) and be connected to the third heat recovery device (60).

[0255] The high pressure engine (427) is connected to the third valve (440) of the third heat recovery device (60), and can be extended from the third valve (440) and connected to the second regeneration coil (451).

[0256] The third valve (440) may include, for example, a four-way valve. The third valve (440) may fluidly connect the heat exchange coils (451, 461, 462) of the outdoor unit (30) and the air treatment device (70) to the refrigerant.

[0257] 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 be condensed in the third outdoor heat exchanger (430). That is, the third outdoor heat exchanger (430) may function as a condenser.

[0258] 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 third heat recovery device (60) is depressurized by 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.

[0259] 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 be extended to the outside of the third outdoor unit (30) and connected to the third heat recovery device (60).

[0260] 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.

[0261] The third outdoor unit (30) may include a low-pressure pipe (464) extending from the inlet side of the third accumulator (405) to the third heat recovery device (60). A low-pressure gaseous refrigerant flows through the low-pressure pipe (464), and may extend to the outside of the third outdoor unit (30) and be connected to the third heat recovery device (60).

[0262] The third outdoor unit (30) and the third heat recovery device (60) can be connected by three pipes. In detail, the third outdoor unit (30) and the third heat recovery device (60) are connected by the high pressure engine (427), the liquid pipe (435), and the low pressure engine (464), so that refrigerant can circulate between the third outdoor unit (30) and the third heat recovery device (60).

[0263] The third heat recovery device (60) may include a third valve (440) connected to the high pressure engine (427). For example, the third valve (440) may include a four-way valve.

[0264] The third valve (440) can transfer the refrigerant of the high pressure engine (427) to the second regeneration coil (451) to condense it. That is, the second regeneration coil (451) can function as a condenser. The second regeneration coil (451) is installed in the third flow path (95), and the air in the third flow path (95) can be heated while passing through the second regeneration coil (451).

[0265] Ultimately, the air introduced into the third flow path (95) through the second external air introduction section (96) is heated as it passes through the second regeneration coil (451), and the heated air can provide heat for regeneration of the dehumidifying rotor (160). Therefore, the regeneration efficiency can be improved.

[0266] The third heat recovery device (60) may include a third internal heat exchanger (62). The third internal heat exchanger (62) may be configured as a heat exchanger in which heat exchange occurs between refrigerants.

[0267] The third internal heat exchanger (62) may be configured to allow heat exchange between the medium-temperature, high-pressure two-phase refrigerant flowing through the liquid pipe (435) and the low-temperature refrigerant flowing through the low-pressure engine (464). In this process, the refrigerant in the liquid pipe (435) may be further condensed.

[0268] When the third cycle unit (1c) operates, at least a portion of the high-pressure refrigerant compressed in the third compressor (410) is branched to the second regeneration coil (451) through the high-pressure engine (427), so the high pressure of the third cycle unit (1c) decreases, and thus heat dissipation in the third outdoor heat exchanger (430) may not be smooth.

[0269] To solve this problem, the third internal heat exchanger (62) is provided in the third heat recovery device (60) to further condense the refrigerant in the liquid pipe (435), thereby improving the condensation performance of the cycle.

[0270] The third cycle section (1c) may include a fifth cooling coil (461) and a sixth cooling coil (462) connected to the liquid pipe (435). The liquid pipe (435) may be extended from the third internal heat exchanger (62) to the fifth cooling coil (461) after being radiated from the third internal heat exchanger (62).

[0271] The fifth and sixth cooling coils (461, 462) are installed in the first flow path (80) and can remove moisture by cooling the air dehumidified in the dehumidifying rotor (160). The fifth and sixth cooling coils (461, 462) can be placed on the outlet side of the dehumidifying rotor (160) within the first flow path (80).

[0272] The fifth and sixth cooling coils (461, 462) may be arranged in series on the air flow path side of the first flow path (80). Accordingly, the air may be cooled and dehumidified while passing through the fifth and sixth cooling coils (461, 462) in sequence.

[0273] A coil outlet pipe (453) may be connected to the outlet side of the second regeneration coil (451). A medium-temperature, high-pressure liquid refrigerant condensed in the second regeneration coil (451) may flow through the coil outlet pipe (453).

[0274] A control valve (254) may be installed in the coil outlet pipe (253). For example, the control valve (454) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted. The opening of the control valve (454) may control the amount of refrigerant to be introduced into the second regeneration coil (451). The amount of refrigerant to be introduced into the third outdoor heat exchanger (430) may also be controlled according to the opening of the control valve (454).

[0275] The coil outlet pipe (453) can be connected to the liquid pipe (435). In detail, the liquid pipe (435) forms a first branch portion (435a), and the coil outlet pipe (453) can be connected to the liquid pipe (435) through the first branch portion (435a).

[0276] The refrigerant of the coil outlet pipe (453) flows into the liquid pipe (435) through the first branch portion (435a), and can flow into the fifth cooling coil (461) by combining with the refrigerant of the liquid pipe (435). A fifth coil expansion valve (436) for reducing the pressure of the refrigerant to flow into the fifth cooling coil (461) can be installed on the inlet side of the fifth cooling coil (461).

[0277] The above fifth coil expansion valve (436) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted for reducing the pressure of the refrigerant, for example.

[0278] The above liquid pipe (435) forms a second branch portion (435b), and a liquid branch pipe (438) connected to the second branch portion (435b) and connected to the sixth cooling coil (462) may be provided. The above liquid branch pipe (438) may be understood as a component of the above liquid pipe (435).

[0279] At least a portion of the refrigerant in the liquid pipe (435) may flow into the liquid branch pipe (438) through the second branch portion (435b) and into the sixth cooling coil (462).

[0280] A sixth coil expansion valve (437) may be installed on the inlet side of the sixth cooling coil (462) to reduce the pressure of the refrigerant to be introduced into the sixth cooling coil (462). The second coil expansion valve (237) may be configured as an electronic expansion valve (EEV) whose opening can be adjusted, for example, to reduce the pressure of the refrigerant.

[0281] The refrigerant depressurized in the fifth coil expansion valve (436) may flow into the fifth cooling coil (461) and evaporate, and the refrigerant depressurized in the sixth coil expansion valve (437) may flow into the sixth cooling coil (462) and evaporate.

[0282] The above-mentioned fifth and sixth cooling coils (461, 462) can be connected to a low-pressure engine (464). Therefore, the refrigerant evaporated in the fifth and sixth cooling coils (461, 462) can flow through the low-pressure engine (464) and flow into the third outdoor unit (30) through the third internal heat exchanger (62).

[0283] In detail, a low pressure engine (464) is connected to the outlet of the fifth cooling coil (461), and the low pressure engine (464) can extend through the third internal heat exchanger (62).

[0284] An engine branch pipe (466) is connected to the outlet of the sixth cooling coil (462), and the engine branch pipe (466) can be configured to be connected to the third valve (440) and extend from the third valve (440) to be connected to the low-pressure engine (464). The engine branch pipe (466) can be understood as a component of the low-pressure engine.

[0285] The low pressure 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). Among the low pressure refrigerants introduced into the third accumulator (405) from the low pressure organ (464), the gaseous refrigerant may be sucked into the third compressor (410).

[0286] In this way, in the third cycle section (1c), refrigerant circulation can be performed to drive the fifth and sixth cooling coils (461, 462) to cool the air inside the first flow section (80).

[0287] In addition, by arranging a second regeneration coil (451) inside the third flow path (95) and heating the air flowing through the third flow path (95), regeneration heat can be provided, thereby increasing the regeneration efficiency.

[0288] The above air treatment device (70) may include a bypass duct (86) connecting the first flow path (80) and the third flow path (95). A bypass fan (86a) may be installed in the bypass duct (86).

[0289] 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 third flow path (95), thereby helping to increase the temperature of the air in the third flow path (95).

[0290] For convenience of explanation, the bypass duct (85) and bypass fan (85a) provided on the first cycle section (1a) side may be named the first bypass duct and the first bypass fan, respectively, and the bypass duct (86) and bypass fan (86a) provided on the third cycle section (1c) side may be named the second bypass duct and the second bypass fan, respectively.

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

[0292] Referring to FIG. 5, 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 temperature and humidity of the outside air are relatively high. For example, the first mode can be operated in the summer when the outside air temperature is approximately 30°C or higher, and the first mode can be referred to as a "summer mode."

[0293] In the above first mode, the first outdoor unit (10) of the first cycle unit (1a), the second outdoor unit (20) of the second cycle unit (1b), and the third outdoor unit (30) of the third cycle unit (1c) can all be operated in cooling mode.

[0294] 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 internal heat exchanger (42) through the liquid pipe (235).

[0295] The refrigerant in the above liquid pipe (235) can be further condensed by exchanging heat with the refrigerant of the low pressure engine (264) in the first internal heat exchanger (42). At least a portion of the additionally condensed refrigerant can be depressurized in the first coil expansion valve (236) and then introduced into the first cooling coil (261) to evaporate.

[0296] Among the additionally condensed refrigerant, the remaining refrigerant branched from the second branch section (235b) flows through the liquid branch pipe (238), is depressurized in the second coil expansion valve (237), and then flows into the second cooling coil (262) to evaporate.

[0297] The refrigerant evaporated in the first cooling coil (261) flows through the low-pressure engine (264), and the refrigerant evaporated in the second cooling coil (262) flows through the engine branch pipe (266) and can be combined with the low-pressure engine (264). The combined low-pressure refrigerant can exchange heat (additionally evaporate) with the refrigerant in the liquid pipe (235) in the first internal heat exchanger (42).

[0298] The refrigerant that has undergone heat exchange in the first internal heat exchanger (42) is introduced into the first outdoor unit (10), and after passing through the first accumulator (205), can be sucked into the first compressor (210).

[0299] Meanwhile, another portion of the refrigerant compressed in the first compressor (210) may be introduced into the first heat recovery device (40) through the second valve (222) and into the first heat recovery coil (251) through the third valve (240). The refrigerant is condensed in the first heat recovery coil (251), and the condensed refrigerant may be combined with the liquid pipe (235) through the first branch portion (235a).

[0300] The refrigerant combined in the above liquid pipe (235) can be evaporated in the first cooling coil (261) after being depressurized in the first coil expansion valve (236) as described above. The first heat recovery coil (251) can be easily condensed by the air flowing in the second flow path (90).

[0301] Meanwhile, when the bypass fan (85a) is driven, at least a portion of the low-humidity air flowing through the second flow path (90) can flow into the first flow path (80) through the bypass duct (85) and into the first and second cooling coils (261, 262).

[0302] Next, in the second cycle section (1b), when the second compressor (310) of the second outdoor unit (20) is driven, at least a portion of the first refrigerant compressed in the second compressor (310) flows into the second outdoor heat exchanger (330) through the first valve (320), and the first refrigerant condensed in the second outdoor heat exchanger (330) can flow into the second internal heat exchanger (52) through the liquid pipe (335).

[0303] The first refrigerant of the above liquid pipe (335) can be further condensed by exchanging heat with the first refrigerant of the low-pressure engine (364) in the second internal heat exchanger (52). At least a portion of the additionally condensed first refrigerant can be depressurized in the third coil expansion valve (336) and then introduced into the third cooling coil (361) to evaporate.

[0304] Among the additionally condensed refrigerants, the remaining first refrigerant branched from the second branch (235b) flows through the liquid branch pipe (338), is depressurized in the fourth coil expansion valve (337), and then flows into the fourth cooling coil (362) to evaporate.

[0305] The first refrigerant evaporated in the third cooling coil (361) flows through the low-pressure engine (364), and the first refrigerant evaporated in the fourth cooling coil (362) flows through the engine branch pipe (366) and can be combined with the low-pressure engine (364). The combined low-pressure first refrigerant can exchange heat (additionally evaporate) with the refrigerant of the liquid pipe (335) in the second internal heat exchanger (52).

[0306] The first refrigerant evaporated in the second internal heat exchanger (52) is introduced into the second outdoor unit (20), and after passing through the second accumulator (305), can be sucked into the second compressor (310).

[0307] Meanwhile, another portion of the first refrigerant compressed in the second compressor (310) may be introduced into the second heat recovery device (50) through the second valve (322) and into the intermediate heat exchanger (130) through the third valve (340). The first refrigerant is condensed in the intermediate heat exchanger (130), and the condensed first refrigerant may be combined with the liquid pipe (335) through the first branch portion (335a).

[0308] The refrigerant combined in the above liquid pipe (335) can be depressurized in the third coil expansion valve (336) as described above and then evaporated in the third cooling coil (361).

[0309] The second cycle section (1b) above is equipped with a high-temperature extraction device (100). The second refrigerant compressed in the intermediate compressor (110) of the high-temperature extraction device (100) flows through the discharge pipe (112) and flows into the first regeneration coil (140) through the check valve (113) to be condensed. The air in the third flow path (95) passing through the first regeneration coil (140) is heated and can be utilized as regeneration heat of the dehumidifying rotor (160).

[0310] 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).

[0311] 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).

[0312] 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).

[0313] 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 second heat recovery coil (170).

[0314] Based on the air flow in the third flow path (95), the second 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 second heat recovery coil (170). Through the heat exchange, the second refrigerant can be evaporated.

[0315] 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).

[0316] The dehumidification area of ​​the above dehumidification rotor (160) may be arranged in the first flow path (80) and on the outlet side of the third and fourth cooling coils (361, 362). Accordingly, the air cooled and dehumidified in the third and fourth cooling coils (361, 362) may be further dehumidified as it passes through the dehumidification area of ​​the dehumidification rotor (160).

[0317] The regeneration area of ​​the dehumidifying rotor (160) is arranged in the third flow path (95) and can be regenerated by air flowing through the third 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).

[0318] 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.

[0319] Next, in the third cycle section (1c), when the third compressor (410) of the third outdoor unit (30) is driven, at least a portion of the refrigerant compressed in the third compressor (410) flows into the third outdoor heat exchanger (430) through the first valve (420), and the refrigerant condensed in the third outdoor heat exchanger (430) can flow into the third internal heat exchanger (62) through the liquid pipe (435).

[0320] The refrigerant in the above liquid pipe (235) can be further condensed by exchanging heat with the refrigerant of the low pressure engine (464) in the third internal heat exchanger (62). At least a portion of the additionally condensed refrigerant can be depressurized in the fifth coil expansion valve (436) and then introduced into the fifth cooling coil (461) to evaporate.

[0321] Among the additionally condensed refrigerant, the remaining refrigerant branched from the second branch (435b) flows through the liquid branch pipe (438), is depressurized in the sixth coil expansion valve (437), and then flows into the sixth cooling coil (462) to evaporate.

[0322] The refrigerant evaporated in the fifth cooling coil (461) flows through the low-pressure engine (464), and the refrigerant evaporated in the sixth cooling coil (462) flows through the engine branch pipe (466) and can be combined with the low-pressure engine (464). The combined low-pressure refrigerant can exchange heat (additionally evaporate) with the refrigerant in the liquid pipe (235) in the third internal heat exchanger (62).

[0323] The refrigerant that has undergone heat exchange in the third internal heat exchanger (62) is introduced into the third outdoor unit (30), and after passing through the third accumulator (405), can be sucked into the third compressor (410).

[0324] Meanwhile, another portion of the refrigerant compressed in the third compressor (410) may be introduced into the third heat recovery device (60) through the second valve (422) and into the second regeneration coil (451) through the third valve (440). The refrigerant is condensed in the second regeneration coil (451), and the condensed refrigerant may be combined with the liquid pipe (435) through the first branch portion (435a).

[0325] The refrigerant combined in the above liquid pipe (435) can be evaporated in the fifth cooling coil (461) after being depressurized in the fifth coil expansion valve (436) as described above. The second regeneration coil (451) can be easily condensed by the air flowing in the third flow path (95).

[0326] 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 third flow path (95) through the bypass duct (86) and into the second regeneration coil (451).

[0327] Describes air flow.

[0328] The outside air introduced from the first outside air introduction section (81) of the first duct section (80) is cooled and dehumidified as it passes through the first and second cooling coils (261, 262), and can be further cooled and dehumidified as it passes through the third and fourth cooling coils (361, 362).

[0329] And, the air is dehumidified as it passes through the dehumidification area of ​​the dehumidifying rotor (160), and can be further cooled and dehumidified as it passes through the fifth and sixth cooling coils (461, 462). The additionally cooled and dehumidified air can be supplied indoors through the first fan (83) and the indoor supply unit (82).

[0330] The air introduced through the indoor air introduction part (91) of the second duct (90) can pass through the second fan (93), be heated in the first heat recovery coil (251), and then be discharged to the outside through the first exhaust part (92).

[0331] The outside air introduced from the second outside air introduction section (96) of the third flow path (95) above can be heated for the first time while passing through the second regeneration coil (451) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time is heated for the third time while passing through the regeneration heater (150) and is regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0332] The air that has undergone the above regeneration is cooled as it passes through the second heat recovery coil (170), passes through the third fan (98), and can be discharged to the outside through the second exhaust section (97).

[0333] Figure 6 is a cycle diagram showing the operation of the second mode of the air conditioning device according to an embodiment of the present invention.

[0334] Referring to FIG. 6, 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."

[0335] First, in the second mode, the first cycle section (1a) can be stopped. Accordingly, the first compressor (210) is turned off, and the refrigerant does not flow through the first heat recovery device (40), the first and second cooling coils (261, 262), and the first heat recovery coil (251).

[0336] Next, in the second cycle section (1b), the second outdoor unit (20) can be operated in heating mode.

[0337] When the second compressor (310) of the second outdoor unit (20) is driven, the first refrigerant compressed in the second compressor (310) may flow into the second heat recovery device (50) through the second valve (322) and into the intermediate heat exchanger (130) through the third valve (340). The first refrigerant may be condensed in the intermediate heat exchanger (130), and the condensed first refrigerant may be combined with the liquid pipe (335) through the first branch portion (335a).

[0338] Some of the first refrigerant among the refrigerants combined in the above liquid pipe (335) may be depressurized in the third coil expansion valve (336) and then evaporated in the third cooling coil (361). Other parts of the first refrigerant may flow in the liquid branch pipe (338) and be depressurized in the fourth coil expansion valve (337) and then evaporated in the fourth cooling coil (362).

[0339] The first refrigerant evaporated in the third cooling coil (361) flows through the low-pressure engine (364), and the first refrigerant evaporated in the fourth cooling coil (362) flows through the engine branch pipe (366) and can be combined with the low-pressure engine (364). The combined low-pressure first refrigerant can exchange heat (additionally evaporate) with the refrigerant of the liquid pipe (335) in the second internal heat exchanger (52).

[0340] Meanwhile, another portion of the first refrigerant from the first branch (335a) flows into the second internal heat exchanger (52) through the liquid pipe (335) and can exchange heat with the first refrigerant of the low pressure engine (364).

[0341] The refrigerant of the low pressure engine (364) that has undergone heat exchange in the second internal heat exchanger (52) is introduced into the second outdoor unit (20), and after passing through the second accumulator (305), can be sucked into the second compressor (310).

[0342] Meanwhile, the refrigerant in the liquid pipe (335) that has undergone heat exchange in the second internal heat exchanger (52) is depressurized in the outdoor expansion valve (334) and then evaporated in the second outdoor heat exchanger (330), and after passing through the second accumulator (305), can be sucked into the second compressor (310).

[0343] 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) where it can be condensed. The air in the third flow path (95) passing through the first regeneration coil (140) can be heated and utilized as regeneration heat of the dehumidifying rotor (160).

[0344] 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).

[0345] 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).

[0346] 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).

[0347] 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 second heat recovery coil (170).

[0348] Based on the air flow in the third flow path (95), the second 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 second heat recovery coil (170). Through the heat exchange, the second refrigerant can be evaporated.

[0349] 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).

[0350] In this way, the flow pattern of the second refrigerant circulating through the high-temperature extraction device (100) in the second mode may be identical to the flow pattern of the second refrigerant in the first mode. In addition, the description of the air flow pattern in the first flow path (80) and the third flow path (95) may also be based on the description in the first mode.

[0351] 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.

[0352] 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 flows into the second heat recovery coil (170) to be evaporated. The evaporated second refrigerant can be sucked into the intermediate compressor (110) through the intermediate accumulator (105).

[0353] Next, in the third cycle section (1c), 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 heat recovery device (60) through the second valve (422) and can flow into the second regeneration coil (451) through the third valve (340).

[0354] The above refrigerant is condensed in the second regeneration coil (451), and the condensed refrigerant can be combined with the liquid pipe (335) through the first branch portion (435a).

[0355] Some of the refrigerant combined in the above liquid pipe (335) may be depressurized in the fifth coil expansion valve (436) and then evaporated in the fifth cooling coil (461). Other parts of the refrigerant may flow in the liquid branch pipe (438) and be depressurized in the sixth coil expansion valve (437) and then evaporated in the sixth cooling coil (62).

[0356] The refrigerant evaporated in the fifth cooling coil (461) flows through the low-pressure engine (464), and the refrigerant evaporated in the sixth cooling coil (462) flows through the engine branch pipe (366) and can be combined with the low-pressure engine (464). The combined low-pressure refrigerant can exchange heat (additionally evaporate) with the refrigerant in the liquid pipe (435) in the third internal heat exchanger (62).

[0357] Meanwhile, another portion of the refrigerant branched from the second branch (435b) flows into the third internal heat exchanger (62) through the liquid pipe (435) and can exchange heat with the refrigerant of the low pressure engine (464).

[0358] The refrigerant of the low pressure engine (464) that has undergone heat exchange in the third internal heat exchanger (62) is introduced into the third outdoor unit (30), and after passing through the third accumulator (305), can be sucked into the third compressor (410).

[0359] The refrigerant in the liquid pipe (435) that has undergone heat exchange in the third internal heat exchanger (62) may be depressurized in the outdoor expansion valve (434) and evaporated in the third outdoor heat exchanger (430). The refrigerant evaporated in the third outdoor heat exchanger (430) may be sucked into the third compressor (410) after passing through the third accumulator (305).

[0360] Describes air flow.

[0361] The outside air introduced from the first outside air introduction section (81) of the first duct (80) can pass through the first and second cooling coils (261, 262) that are stationary. In addition, the air can be cooled and dehumidified while passing through the third and fourth cooling coils (361, 362).

[0362] The air is dehumidified as it passes through the dehumidification area of ​​the dehumidifying rotor (160), and can be further cooled and dehumidified as it passes through the fifth and sixth cooling coils (461, 462). The additionally cooled and dehumidified air can be supplied indoors through the first fan (83) and the indoor supply unit (82).

[0363] The above second fan (93) stops, and air flow in the second flow path (90) may not occur.

[0364] The outside air introduced from the second outside air introduction section (96) of the third flow path (95) above can be heated for the first time while passing through the second regeneration coil (451) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time is heated for the third time while passing through the regeneration heater (150) and is regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0365] The air that has undergone the above regeneration is cooled as it passes through the second heat recovery coil (170), passes through the third fan (98), and can be discharged to the outside through the second exhaust section (97).

[0366] Fig. 7 is a cycle diagram showing the operation of the third mode of the air conditioning device according to an embodiment of the present invention.

[0367] Referring to FIG. 7, 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 in which the device operates under conditions in which the outside temperature and humidity are significantly low. For example, the third mode can be operated during the low-temperature winter season when the outside temperature is below approximately 4°C, and the third mode can be referred to as a "low-temperature winter mode."

[0368] In the aforementioned low-temperature winter season, the outdoor temperature is low, but the humidity is relatively mild, so the dehumidification load may not be significant. Therefore, rather than focusing on dehumidification, heating can be focused on supplying air to indoor spaces.

[0369] In the third mode, the first outdoor unit (10) of the first cycle unit (1a), the second outdoor unit (20) of the second cycle unit (1b), and the third outdoor unit (30) of the third cycle unit (1c) can all perform the heating mode.

[0370] First, in the third mode, the first outdoor unit (10) of the first cycle section (1a) can perform heating operation.

[0371] 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 into the first heat recovery device (40) through the second valve (222) and into the second cooling coil (262) through the third valve (240). The refrigerant is condensed in the second cooling coil (262), and the condensed refrigerant can flow through the liquid pipe (235).

[0372] At this time, the first expansion valve (254) and the second expansion valve (236) are closed so that the refrigerant condensed in the second cooling coil (262) may not flow to the first heat recovery coil (251) and the first cooling coil (261).

[0373] The refrigerant flowing through the above liquid pipe (235) passes through the first internal heat exchanger (42). The heat exchange action of the refrigerant may not occur in the first internal heat exchanger (42).

[0374] The refrigerant that has passed through the first internal heat exchanger (42) flows into the first outdoor unit (10), is depressurized in the outdoor expansion valve (234), and then evaporates in the first outdoor heat exchanger (230). The evaporated refrigerant can be sucked into the first compressor (210) through the first accumulator (205).

[0375] Next, in the second cycle section (1b), the second outdoor unit (20) can be operated in heating mode.

[0376] When the second compressor (310) of the second outdoor unit (20) is driven, the first refrigerant compressed in the second compressor (310) may flow into the second heat recovery device (50) through the second valve (322) and into the fourth cooling coil (362) through the third valve (340). At this time, the fourth coil expansion valve (337) may be fully open, preventing the refrigerant from being decompressed.

[0377] Meanwhile, the third coil expansion valve (336) may be closed, so that refrigerant may not flow into the third cooling coil (361).

[0378] The refrigerant condensed in the fourth cooling coil (362) flows into the liquid pipe (335), and the refrigerant in the liquid pipe (335) can flow into the second outdoor unit (20) via the second internal heat exchanger (52).

[0379] The refrigerant introduced into the second outdoor unit (20) is depressurized in the outdoor expansion valve (334) and then evaporated in the second outdoor heat exchanger (330). The evaporated refrigerant can be sucked into the second compressor (310) through the second accumulator (305).

[0380] The above high temperature extraction device (100) stops. That is, the intermediate compressor (110) does not operate, and refrigerant may not flow into the second heat recovery coil (170) and the first regeneration coil (140). In addition, the dehumidifying rotor (160) and the regeneration heater (150) may stop operating.

[0381] Therefore, the first refrigerant introduced into the intermediate heat exchanger (130) may not exchange heat with the second refrigerant.

[0382] Next, in the third cycle section (1c), when the third compressor (410) of the third outdoor unit (30) is driven, the refrigerant compressed in the third compressor (410) may flow into the third heat recovery device (60) through the second valve (422) and into the sixth cooling coil (462) through the third valve (340). At this time, the sixth coil expansion valve (437) may be fully open, so that the refrigerant pressure may not be reduced.

[0383] Meanwhile, the fifth coil expansion valve (436) is closed so that refrigerant cannot flow into the third cooling coil (361), and the control valve (454) is also closed so that refrigerant cannot flow into the second regeneration coil (451).

[0384] The above refrigerant is condensed in the sixth cooling coil (462), and the condensed refrigerant can flow into the liquid pipe (435). The refrigerant in the liquid pipe (335) can flow into the third outdoor unit (30) via the third internal heat exchanger (62).

[0385] The refrigerant introduced into the third outdoor unit (30) is depressurized in the outdoor expansion valve (334) and then evaporated in the third outdoor heat exchanger (430). The evaporated refrigerant can be sucked into the third compressor (410) through the third accumulator (405).

[0386] Describes air flow.

[0387] The outside air introduced from the first outside air introduction section (81) of the first flow path (80) passes through the stationary first cooling coil (261) and can be heated while passing through the second cooling coil (262). In addition, the air passes through the stationary third cooling coil (361) and can be heated while passing through the fourth cooling coil (362).

[0388] Since the dehumidifying rotor (160) does not operate, the air may not be dehumidified as it passes through the dehumidifying rotor (160). The air that has passed through the dehumidifying rotor (160) passes through the stationary fifth cooling coil (461) and may be heated as it passes through the sixth cooling coil (462). Then, the air may pass through the first fan (83) and be supplied to the indoor space through the indoor supply unit (82).

[0389] The above second fan (93) and third fan (98) can be stopped.

[0390] Figure 8 is a cycle diagram showing the operation of the fourth mode of the air conditioning device according to an embodiment of the present invention.

[0391] Referring to Fig. 8, 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 outside air temperature is at a room temperature condition and the humidity is at an intermediate level (a level between the outside air humidity levels in the first and second modes). For example, the fourth mode can be operated in the inter-season when the outside air temperature is in the range of about 10 to 30°C, and the fourth mode can be called an "inter-seasonal mode."

[0392] First, in the second mode, the first cycle section (1a) can be stopped. Accordingly, the first compressor (210) is turned off, and the refrigerant does not flow through the first heat recovery device (40), the first and second cooling coils (261, 262), and the first heat recovery coil (251).

[0393] Next, the second outdoor unit (20) of the first cycle section (1b) can be operated in cooling mode.

[0394] In detail, in the second cycle section (1b), when the second compressor (310) of the second outdoor unit (20) is driven, at least a portion of the first refrigerant compressed in the second compressor (310) flows into the second outdoor heat exchanger (330) through the first valve (320), and the first refrigerant condensed in the second outdoor heat exchanger (330) can flow into the second internal heat exchanger (52) through the liquid pipe (335).

[0395] The first refrigerant of the above liquid pipe (235) can be further condensed by exchanging heat with the first refrigerant of the low-pressure engine (364) in the second internal heat exchanger (52). At least a portion of the additionally condensed first refrigerant can be depressurized in the third coil expansion valve (336) and then introduced into the third cooling coil (361) to evaporate.

[0396] Among the additionally condensed refrigerants, the remaining first refrigerant branched from the second branch (235b) flows through the liquid branch pipe (338), is depressurized in the fourth coil expansion valve (337), and then flows into the fourth cooling coil (362) to evaporate.

[0397] The first refrigerant evaporated in the third cooling coil (361) flows through the low-pressure engine (364), and the first refrigerant evaporated in the fourth cooling coil (462) flows through the engine branch pipe (366) and can be combined with the low-pressure engine (364). The combined low-pressure first refrigerant can exchange heat (additionally evaporate) with the refrigerant of the liquid pipe (335) in the second internal heat exchanger (52).

[0398] The first refrigerant evaporated in the second internal heat exchanger (52) is introduced into the second outdoor unit (20), and after passing through the second accumulator (305), can be sucked into the second compressor (310).

[0399] Meanwhile, another portion of the first refrigerant compressed in the second compressor (310) may be introduced into the second heat recovery device (50) through the second valve (322) and into the intermediate heat exchanger (130) through the third valve (340). The first refrigerant is condensed in the intermediate heat exchanger (130), and the condensed first refrigerant may be combined with the liquid pipe (335) through the first branch portion (335a).

[0400] The refrigerant combined in the above liquid pipe (335) can be depressurized in the third coil expansion valve (336) as described above and then evaporated in the third cooling coil (361).

[0401] The second cycle section (1b) above is equipped with a high-temperature extraction device (100). The second refrigerant compressed in the intermediate compressor (110) of the high-temperature extraction device (100) flows through the discharge pipe (112) and flows into the first regeneration coil (140) through the check valve (113) to be condensed. The air in the third flow path (95) passing through the first regeneration coil (140) is heated and can be utilized as regeneration heat of the dehumidifying rotor (160).

[0402] 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).

[0403] 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).

[0404] 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).

[0405] 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 second heat recovery coil (170).

[0406] Based on the air flow in the third flow path (95), the second 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 second heat recovery coil (170). Through the heat exchange, the second refrigerant can be evaporated.

[0407] 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).

[0408] The dehumidification area of ​​the above dehumidification rotor (160) may be arranged in the first flow path (80) and on the outlet side of the third and fourth cooling coils (361, 362). Accordingly, the air cooled and dehumidified in the third and fourth cooling coils (361, 362) may be further dehumidified as it passes through the dehumidification area of ​​the dehumidification rotor (160).

[0409] The regeneration area of ​​the dehumidifying rotor (160) is arranged in the third flow path (95) and can be regenerated by air flowing through the third 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).

[0410] 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.

[0411] Next, the third outdoor unit (30) of the third cycle section (1c) can be operated in heating mode.

[0412] In detail, in the third cycle section (1c), 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 heat recovery device (60) through the second valve (422) and can flow into the second regeneration coil (451) through the third valve (340).

[0413] The above refrigerant is condensed in the second regeneration coil (451), and the condensed refrigerant can be combined with the liquid pipe (335) through the first branch portion (435a).

[0414] Some of the refrigerant combined in the above liquid pipe (335) may be depressurized in the fifth coil expansion valve (436) and then evaporated in the fifth cooling coil (461). Other parts of the refrigerant may flow in the liquid branch pipe (438) and be depressurized in the sixth coil expansion valve (437) and then evaporated in the sixth cooling coil (62).

[0415] The refrigerant evaporated in the fifth cooling coil (461) flows through the low-pressure engine (464), and the refrigerant evaporated in the sixth cooling coil (462) flows through the engine branch pipe (366) and can be combined with the low-pressure engine (464). The combined low-pressure refrigerant can exchange heat (additionally evaporate) with the refrigerant in the liquid pipe (435) in the third internal heat exchanger (62).

[0416] Meanwhile, another portion of the refrigerant branched from the second branch (435b) flows into the third internal heat exchanger (62) through the liquid pipe (435) and can exchange heat with the refrigerant of the low pressure engine (464).

[0417] The refrigerant of the low pressure engine (464) that has undergone heat exchange in the third internal heat exchanger (62) is introduced into the third outdoor unit (30), and after passing through the third accumulator (305), can be sucked into the third compressor (410).

[0418] The refrigerant in the liquid pipe (435) that has undergone heat exchange in the third internal heat exchanger (62) may be depressurized in the outdoor expansion valve (434) and evaporated in the third outdoor heat exchanger (430). The refrigerant evaporated in the third outdoor heat exchanger (430) may be sucked into the third compressor (410) after passing through the third accumulator (305).

[0419] Describes air flow.

[0420] The outside air introduced from the first outside air introduction section (81) of the first duct (80) can pass through the first and second cooling coils (261, 262) that are stationary. In addition, the air can be cooled and dehumidified while passing through the third and fourth cooling coils (361, 362).

[0421] The air is dehumidified as it passes through the dehumidification area of ​​the dehumidifying rotor (160), and can be further cooled and dehumidified as it passes through the fifth and sixth cooling coils (461, 462). The additionally cooled and dehumidified air can be supplied indoors through the first fan (83) and the indoor supply unit (82).

[0422] The above second fan (93) stops, and air flow in the second flow path (90) may not occur.

[0423] The outside air introduced from the second outside air introduction section (96) of the third flow path (95) above can be heated for the first time while passing through the second regeneration coil (451) and heated for the second time while passing through the first regeneration coil (140). The air heated for the second time is heated for the third time while passing through the regeneration heater (150) and is regenerated while passing through the regeneration area of ​​the dehumidifying rotor (160).

[0424] The air that has undergone the above regeneration is cooled as it passes through the second heat recovery coil (170), passes through the third fan (98), and can be discharged to the outside through the second exhaust section (97).

[0425] 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 third flow path (95) through the bypass duct (86) and into the second regeneration coil (451).

[0426] The present invention relates to an air conditioning device, and provides an air conditioning device having a plurality of cycle sections, thereby enabling the device to dehumidify air and easily supply it to an indoor space. Therefore, the present 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 handling device having a flow path so that a plurality of heat exchangers are installed that are fluidly connected to the first to third outdoor units, The air treatment device includes a dehumidifying rotor for removing moisture from air flowing into the air treatment device and a regeneration heater for providing regeneration heat to the dehumidifying rotor. An air conditioning device in which the plurality of heat exchangers include regenerative coils that provide condensation heat to increase the temperature of air passing through the regenerative heater.

2. In paragraph 1, It further includes a first heat recovery device fluidly connected to the first outdoor unit and having a first internal heat exchanger and a valve device. An air conditioning device in which the above plurality of heat exchangers include a first heat recovery coil for recovering heat of the refrigerant compressed in the first compressor and a cooling coil that acts as an evaporator for cooling and dehumidifying air passing through the passage section.

3. In paragraph 2, The above-mentioned flow path includes a first flow path forming a flow path for introducing outside air and supplying it indoors, and a second flow path forming a flow path for introducing indoor air and discharging it outdoors. An air conditioning device in which the first heat recovery device is installed in the second flow section and the cooling coil is installed in the first flow section.

4. In paragraph 2, A first coil expansion valve for reducing the pressure of some of the refrigerant condensed in the first outdoor heat exchanger and the first internal heat exchanger; and It further includes a second coil expansion valve for reducing the pressure of another portion of the refrigerant among the refrigerant condensed in the first outdoor heat exchanger and the first internal heat exchanger, An air conditioning device including a first cooling coil provided on the outlet side of the first coil expansion valve and a second cooling coil provided on the outlet side of the second coil expansion valve.

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

6. In paragraph 5, 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.

7. In paragraph 6, An air conditioner wherein the first refrigerant is R410a and the second refrigerant is R134a.

8. In paragraph 5, An air conditioning device wherein the plurality of heat exchangers further include a first regeneration coil for condensing the second refrigerant compressed in the intermediate compressor, and the first regeneration coil is installed on the inlet side of the regeneration heater based on the air flow in the passage section.

9. In paragraph 8, It further includes a coil-side expansion valve for reducing the pressure of the second refrigerant condensed in the first regeneration coil, An air conditioning device in which the above plurality of heat exchangers evaporate a second refrigerant depressurized by a coil-side expansion valve and include a second heat recovery coil arranged on the outlet side of the dehumidifying rotor based on the air flow in the passage section.

10. In paragraph 5, The above high temperature extraction device, An air conditioning device including a liquid separator disposed on the inlet side of the intermediate heat exchanger and configured to separate liquid refrigerant from the second refrigerant to be introduced into the intermediate heat exchanger.

11. In paragraph 5, 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 intermediate heat exchanger to be connected to the outlet side of the intermediate heat exchanger.

12. In paragraph 1, A second heat recovery device fluidly connected to the second outdoor unit and having a second internal heat exchanger and a valve device; and An air conditioning device further comprising a cooling coil that acts as an evaporator to cool and dehumidify air passing through the above-mentioned duct.

13. In paragraph 12, A third coil expansion valve for reducing the pressure of some of the refrigerant condensed in the second outdoor heat exchanger and the second internal heat exchanger; and It further includes a fourth coil expansion valve for reducing the pressure of another portion of the refrigerant among the refrigerant condensed in the second outdoor heat exchanger and the second internal heat exchanger, An air conditioning device including a third cooling coil provided on the outlet side of the third coil expansion valve and a fourth cooling coil provided on the outlet side of the fourth coil expansion valve.

14. In paragraph 1, A third heat recovery device fluidly connected to the third outdoor unit and having a third internal heat exchanger and valve device; and An air conditioning device further comprising a cooling coil that acts as an evaporator to cool and dehumidify air passing through the above-mentioned duct.

15. In paragraph 14, A fifth coil expansion valve for reducing the pressure of some of the refrigerant condensed in the third outdoor heat exchanger and the third internal heat exchanger; and It further includes a sixth coil expansion valve for reducing the pressure of another portion of the refrigerant condensed in the third outdoor heat exchanger and the third internal heat exchanger. An air conditioning device including a fifth cooling coil provided on the outlet side of the fifth coil expansion valve and a sixth cooling coil provided on the outlet side of the sixth coil expansion valve.

16. An outdoor unit including a compressor for compressing the first refrigerant and an outdoor heat exchanger; A heat recovery device including an internal heat exchanger for further condensing the first refrigerant condensed in the outdoor heat exchanger; A high temperature discharge device including an intermediate compressor for compressing a second refrigerant and an intermediate heat exchanger for performing heat exchange between the first refrigerant discharged from the heat recovery device and the second refrigerant; A regeneration coil that condenses the second refrigerant compressed in the intermediate compressor; A dehumidifying rotor having a regeneration area through which air that has exchanged heat with the regeneration coil passes; and An air conditioning device including a heat recovery coil that is positioned on the outlet side of the dehumidifying rotor based on the flow of the air and is evaporated by air passing through the dehumidifying rotor.

17. In paragraph 16, A flow path forming an air flow path passing through the regeneration coil, the dehumidifying rotor, and the heat recovery coil; and An air conditioning device further comprising a fan disposed in the above-mentioned euro section and generating air flow.

18. In paragraph 17, The above Euro part, A first flow path is formed to introduce outside air and supply it indoors, and a plurality of cooling coils and a dehumidification area of ​​the dehumidifying rotor are arranged; A second flow path is formed by introducing outside air to regenerate the dehumidifying rotor, and the regeneration coil and the regeneration area of ​​the dehumidifying rotor are arranged; and An air conditioning device that forms an exhaust side passage for introducing indoor air and discharging it to the outside, and includes a third passage section in which the heat recovery coil is arranged.

19. In paragraph 17, An air conditioning device further comprising a regenerative heater for supplying regenerative heat to air that has been primarily heated by the regenerative coil, the regenerative heater being positioned between the regenerative coil and the dehumidifying rotor based on the flow of the air.

20. In paragraph 17, Another outdoor unit having an additional compressor and an additional outdoor heat exchanger; and It further includes a plurality of cooling coils for cooling and dehumidifying the air passing through the dehumidifying area of ​​the above dehumidifying rotor, An air conditioning device in which the cooling coils are fluidly connected to the additional compressor so that the refrigerant flowing through the plurality of cooling coils is introduced into the other outdoor unit.

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