Air conditioning system for electric vehicles

Abstract

An air conditioning system for an electric vehicle reduces a heat load that the air conditioning system bears by using a desiccant-coated heat exchanger and improves energy efficiency using waste heat generated by cooling of an electronic device when the desiccant-coated heat exchanger is regenerated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an air conditioning system for an electric vehicle, which reduces a thermal load that the air conditioning system bears by using a desiccant-coated heat exchanger. The system further uses waste heat generated by cooling of an electronic device to improve energy efficiency when the desiccant-coated heat exchanger is regenerated. BACKGROUND

[0002] An electric vehicle is a social issue that has emerged in recent years in order to achieve an environmentally friendly technology and solve problems such as energy depletion. The electric vehicle is operated using an electric motor that receives power supplied from a battery and outputs power. Accordingly, the electric vehicle has advantages of no carbon dioxide emission, low noise, and high energy efficiency of the electric motor than that of an engine. Therefore, the electric vehicle is attracting attention as an environmentally friendly vehicle.

[0003] In these embodiments of the electric vehicle, a battery module-related technology is a core technology, and research on weight reduction, miniaturization, and rapid charging of the battery module is actively being conducted. The battery module must be used in an optimal temperature environment to maintain its optimal performance and long life. However, it is difficult to use the battery module in the optimal temperature environment due to heat generated during driving and changes in external temperature.

[0004] In addition, the electric vehicle does not have a waste heat source generated from a separate engine during combustion, unlike an internal combustion engine, and thus performs heating of the inside thereof using an electric heating device. In cold weather, the electric vehicle must preheat the battery to improve the charge-discharge performance of the battery, and thus uses a separate cooling water heating type electric heater. In other words, a technology is used in which a heating and cooling system for adjusting the temperature of the battery module to maintain the optimal temperature environment of the battery module and a heating and cooling system for adjusting the air inside the vehicle are separately operated.

[0005] In such an electric vehicle, as the thermal load that the air conditioning system bears increases, the amount of consumption of electric power increases, and thus the driving range of the electric vehicle is shortened. Specifically, when the air conditioning system performs a cooling operation or a dehumidification operation in winter, the amount of energy consumption of the air conditioning system increases. In other words, the cooling load includes a sensible heat load and a latent heat load, and a considerable portion of the cooling load is attributed to the latent heat load of condensation. In addition, since, during the dehumidification operation in winter, the air must be cooled to the dew point or lower to condense the vapor, and then heated again for the purpose of dehumidification, energy loss occurs.

[0006] The above information disclosed in the BACKGROUND section is only for the purpose of enhancing the understanding of the background of the present disclosure, and should not be construed as acknowledging that the conventional technology known to those of ordinary skill in the art is described. SUMMARY

[0007] Accordingly, the present disclosure has been made to address the above problems. An object of the present disclosure is to provide an air conditioning system for an electric vehicle that reduces a heat load borne by the air conditioning system by using a desiccant-coated heat exchanger and improves energy efficiency using waste heat generated by cooling of an electronic device when the desiccant-coated heat exchanger is regenerated.

[0008] According to an aspect of the present disclosure, the above and other objects can be achieved by providing an air conditioning system for an electric vehicle. The system includes a refrigerant line configured to circulate a refrigerant therealong and connected to a compressor, a condenser, an expander, and an evaporator. The system further includes a cooling water line configured to circulate cooling water therealong, connected to first and second desiccant-coated heat exchangers, and configured to remove moisture from air, a radiator-type heat exchanger, and an electronic device. The cooling water line is further configured to switch between a low-temperature cooling water circulation and a high-temperature cooling water circulation depending on whether the first and second desiccant-coated heat exchangers perform a dehumidification operation or a regeneration operation. The system further includes an indoor air line configured to selectively pass indoor air through the first and second desiccant-coated heat exchangers and provide indoor air that has passed through the first or second desiccant-coated heat exchanger to an interior of the vehicle via the evaporator and a heater. The system further includes an additional heat exchanger disposed on the cooling water line and configured to exchange heat with outdoor air. The system further includes an outdoor air line. The outdoor air line can include a first outdoor air line configured to pass outdoor air through the condenser and the radiator-type heat exchanger and then discharge the outdoor air to the outside. The outdoor air line can further include a second outdoor air line configured to enable outdoor air to flow therethrough at a location different from that of the first outdoor air line, thereby passing through the additional heat exchanger and then selectively passing through the first and second desiccant-coated heat exchangers.

[0009] When the first desiccant-coated heat exchanger performs the dehumidification operation and the second desiccant-coated heat exchanger performs the regeneration operation, low-temperature cooling water flowing along the cooling water line can be circulated to the first desiccant-coated heat exchanger, and high-temperature cooling water flowing along the cooling water line can be circulated to the second desiccant-coated heat exchanger.

[0010] Low-temperature cooling water that has passed through the radiator-type heat exchanger can be circulated to the first desiccant-coated heat exchanger. High-temperature cooling water that has passed through the electronic device can be circulated to the second desiccant-coated heat exchanger along the cooling water line.

[0011] Indoor air can pass through the first desiccant-coated heat exchanger along the indoor air line. Outdoor air can pass through the second desiccant-coated heat exchanger along the outdoor air line.

[0012] When the first dehumidifying heat exchanger performs a dehumidifying operation and the second dehumidifying heat exchanger performs a regenerating operation, low-temperature cooling water that has passed through the radiator-type heat exchanger can be circulated to the second dehumidifying heat exchanger, and high-temperature cooling water that has passed through the electronic device can be circulated to the first dehumidifying heat exchanger along the cooling water line.

[0013] Low-temperature cooling water that has passed through the radiator-type heat exchanger can be circulated to the second dehumidifying heat exchanger. High-temperature cooling water that has passed through the electronic device can be circulated to the first dehumidifying heat exchanger along the cooling water line.

[0014] Indoor air can pass through the second dehumidifying heat exchanger along an indoor air line. Outdoor air can pass through the first dehumidifying heat exchanger along an outdoor air line.

[0015] The radiator-type heat exchanger can be disposed in front of a condenser on the outdoor air line such that outdoor air passes through the radiator-type heat exchanger and then passes through the condenser.

[0016] When the first dehumidifying heat exchanger performs a dehumidifying operation and the second dehumidifying heat exchanger performs a regenerating operation, low-temperature cooling water that has passed through the additional heat exchanger can be circulated to the second dehumidifying heat exchanger along the cooling water line, and high-temperature cooling water that passes through the electronic device can be circulated to the first dehumidifying heat exchanger and the radiator-type heat exchanger along the cooling water line.

[0017] When a temperature of cooling water that has passed through the electronic device does not satisfy a temperature required for the second dehumidifying heat exchanger to regenerate, high-temperature cooling water that has passed through the electronic device can be circulated to the second dehumidifying heat exchanger alone along the cooling water line.

[0018] Indoor air can pass through the first dehumidifying heat exchanger along an indoor air line. Outdoor air can pass through a condenser and a radiator-type heat exchanger along a first outdoor air line. Outdoor air can pass through an additional heat exchanger and a second dehumidifying heat exchanger along a second outdoor air line.

[0019] When the first dehumidifying heat exchanger performs a regenerating operation and the second dehumidifying heat exchanger performs a dehumidifying operation, low-temperature cooling water that has passed through the additional heat exchanger can be circulated to the second dehumidifying heat exchanger along the cooling water line, and high-temperature cooling water that passes through the electronic device can be circulated to the first dehumidifying heat exchanger and the radiator-type heat exchanger along the cooling water line.

[0020] When a temperature of cooling water that has passed through the electronic device does not satisfy a temperature required for the first dehumidifying heat exchanger to regenerate, high-temperature cooling water that has passed through the electronic device can be circulated to the first dehumidifying heat exchanger alone along the cooling water line.

[0021] The indoor air can pass through the second dehumidification heat exchanger along an indoor air line. The outdoor air can pass through the condenser and the radiator-type heat exchanger along a first outdoor air line. The outdoor air can pass through the additional heat exchanger and the first dehumidification heat exchanger along a second outdoor air line.

[0022] The indoor air line and the outdoor air line can be provided with a first duct valve configured to enable the indoor air or the outdoor air to be selectively circulated to the first dehumidification heat exchanger and the second dehumidification heat exchanger. The indoor air line and the outdoor air line can also be provided with a second duct valve configured to enable the indoor air or the outdoor air, which has passed through the first dehumidification heat exchanger and the second dehumidification heat exchanger, to be circulated to the inside or the outside of the vehicle, the indoor air and the outdoor air being circulated to the first duct valve and the second duct valve.

[0023] A plurality of valves can be provided on the cooling water line so as to determine a circulation path of the cooling water circulated to the first dehumidification heat exchanger, the second dehumidification heat exchanger, the radiator-type heat exchanger, and the electronic device according to whether the valves are opened or closed.

[0024] The cooling water line can include a first cooling water line configured to connect the first dehumidification heat exchanger to the radiator-type heat exchanger, a second cooling water line configured to connect the second dehumidification heat exchanger to the first cooling water line, a third cooling water line and a fourth cooling water line configured to branch from the radiator-type heat exchanger and connected to the first dehumidification heat exchanger and the second dehumidification heat exchanger, respectively, a fifth cooling water line and a sixth cooling water line configured to branch from the electronic device and connected to the first dehumidification heat exchanger and the second dehumidification heat exchanger, respectively, a seventh cooling water line configured to branch from the first cooling water line and connected to the electronic device, and an eighth cooling water line configured to branch from the second cooling water line and connected to the electronic device.

[0025] A first valve can be provided at a connection point between the first cooling water line and the second cooling water line. A second valve can be provided at a branching point between the third cooling water line and the fourth cooling water line. A third valve can be provided at a branching point between the fifth cooling water line and the sixth cooling water line. A fourth valve can be provided at a branching point between the first cooling water line and the seventh cooling water line. A fifth valve can be provided at a branching point between the second cooling water line and the eighth cooling water line.

[0026] The cooling water line can include a first connection line configured to connect the first dehumidification heat exchanger to the radiator-type heat exchanger, a second connection line configured to connect the radiator-type heat exchanger to the electronic device, a third connection line configured to branch from the first connection line and connect to the additional heat exchanger, a fourth connection line and a fifth connection line configured to branch from the additional heat exchanger and connect to the first dehumidification heat exchanger and the second dehumidification heat exchanger, respectively, a sixth connection line and a seventh connection line configured to branch from the electronic device and connect to the first dehumidification heat exchanger and the second dehumidification heat exchanger, respectively, an eighth connection line configured to branch from the first connection line and connect to the electronic device, and a ninth connection line and a tenth connection line configured to branch from the second dehumidification heat exchanger and connect to the third connection line and the radiator-type heat exchanger, respectively.

[0027] The first regulating valve can be provided at a branching point between the first connection line and the third connection line. The second regulating valve can be provided at a connection point between the third connection line and the ninth connection line. The third regulating valve can be provided at a branching point between the fourth connection line and the fifth connection line. The fourth regulating valve can be provided at a branching point between the sixth connection line and the seventh connection line. The fifth regulating valve can be provided at a branching point between the first connection line and the eighth connection line. The sixth regulating valve can be provided at a branching point between the ninth connection line and the tenth connection line.

[0028] The cooling water line can further include an eleventh connection line configured to branch from the ninth connection line and connect to the second connection line. The seventh regulating valve can be provided at a branching point between the ninth connection line and the eleventh connection line. The eighth regulating valve can be provided at a connection point between the eleventh connection line and the second connection line. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and other objects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a circuit diagram of an air conditioning system for an electric vehicle according to a first embodiment of the present disclosure;

[0031] Figure 2 and Figure 3 is a circuit diagram of an air conditioning system for an electric vehicle according to a first embodiment of the present disclosure;

[0032] Figure 4 is a circuit diagram of an air conditioning system for an electric vehicle according to a second embodiment of the present disclosure;

[0033] Figure 5is a circuit diagram of an air conditioning system for an electric vehicle according to a third embodiment of the present disclosure;

[0034] Figure 6 and Figure 7 is a circuit diagram for illustrating an air conditioning system for an electric vehicle according to a third embodiment of the present disclosure;

[0035] Figure 8 and Figure 9 is a circuit diagram for illustrating an air conditioning system for an electric vehicle according to a fourth embodiment of the present disclosure; and

[0036] Figure 10 is a circuit diagram of an air conditioning system for an electric vehicle according to a fifth embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] Reference will now be made in detail embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings to refer to the same or equivalent parts. When components, devices, elements, etc. of the present disclosure are described as having a purpose or performing an operation, function, etc., the components, devices, or elements should be regarded as being "configured to" satisfy the purpose or perform the operation or function, here. Also, the controllers described herein can include processors programmed to perform the described operations, functions, etc.

[0038] An air conditioning system for an electric vehicle according to embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0039] Figure 1 is a circuit diagram of an air conditioning system for an electric vehicle according to a first embodiment of the present disclosure. Figure 2 and Figure 3 is a circuit diagram for illustrating an air conditioning system for an electric vehicle according to a first embodiment of the present disclosure. Figure 4 is a circuit diagram of an air conditioning system for an electric vehicle according to a second embodiment of the present disclosure. Figure 5 is a circuit diagram of an air conditioning system for an electric vehicle according to a third embodiment of the present disclosure. Figure 6 and Figure 7 is a circuit diagram for illustrating an air conditioning system for an electric vehicle according to a third embodiment of the present disclosure. Figure 8 and Figure 9 is a circuit diagram for illustrating an air conditioning system for an electric vehicle according to a fourth embodiment of the present disclosure. Figure 10 is a circuit diagram of an air conditioning system for an electric vehicle according to a fifth embodiment of the present disclosure.

[0040] As Figure 1As shown, the air conditioning system for an electric vehicle according to the present disclosure includes a refrigerant line 10 configured to circulate a refrigerant therealong and connected to a compressor 1, a condenser 2, an expander 3, and an evaporator 4. The system further includes a cooling water line 20 configured to circulate a cooling water therealong, connected to a first dehumidification heat exchanger 5 and a second dehumidification heat exchanger 6, and configured to remove moisture from air, a radiator-type heat exchanger 7, and electronic devices 8. The cooling water line 20 is further configured to switch between a low-temperature cooling water circulation and a high-temperature cooling water circulation depending on whether the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 perform a dehumidification operation or a regeneration operation. The system further includes an indoor air line 30 configured to selectively pass indoor air through the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6. The indoor air line 30 is further configured to supply indoor air that has passed through the first dehumidification heat exchanger 5 or the second dehumidification heat exchanger 6 to a vehicle interior via the evaporator 4 and a heater 9. The system further includes an outdoor air line 40 configured to selectively pass outdoor air through the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6. The outdoor air line 40 is further configured to discharge outdoor air that has passed through the condenser 2 and the radiator-type heat exchanger 7 to the outside via the first dehumidification heat exchanger 5 or the second dehumidification heat exchanger 6.

[0041] In the present disclosure, all of the circulation of the refrigerant, the circulation of the cooling water, whether the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 perform a dehumidification operation or a regeneration operation, whether the heater 9 operates, etc. can be controlled by a controller. In other words, the controller can perform control of the respective elements according to a temperature required in the vehicle interior, and then supply conditioned air of the corresponding temperature to the vehicle interior.

[0042] The refrigerant line 10 is configured to circulate the refrigerant to the compressor 1, the condenser 2, the expander 3, and the evaporator 4 to cool conditioned air.

[0043] The cooling water line 20 is configured to circulate the cooling water to the first dehumidification heat exchanger 5, the second dehumidification heat exchanger 6, the radiator-type heat exchanger 7, and the electronic devices 8 to perform heat exchange. Here, a desiccant is applied to the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 so as to perform dehumidification by heat exchange between heat generated when the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 absorb moisture and the cooling water. Accordingly, the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 can be desiccant-coated heat exchangers (DCHEs). In addition, the electronic devices 8 can be electronic components, such as a motor or an on-board charger (OBC).

[0044] Specifically, in the present disclosure, a first dehumidifying heat exchanger 5 and a second dehumidifying heat exchanger 6 are provided, one of which dehumidifies air and the other of which regenerates a desiccant. Accordingly, the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 alternately perform a dehumidifying operation to maintain a dehumidifying effect.

[0045] With this system, the cooling water line 20 switches a circulation path of cooling water to selectively circulate low-temperature cooling water or high-temperature cooling water to the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6. Accordingly, the cooling water line 20 can allow the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 to selectively perform a dehumidifying operation or a regenerating operation. To this end, a plurality of valves can be provided on the cooling water line 20 so as to determine a circulation path of cooling water circulated to the first dehumidifying heat exchanger 5, the second dehumidifying heat exchanger 6, the radiator-type heat exchanger 7, and the electronic device 8 according to whether the valves 80 are opened or closed.

[0046] In other words, when low-temperature cooling water is circulated to the first dehumidifying heat exchanger 5 along the cooling water line 20, the first dehumidifying heat exchanger 5 performs a dehumidifying operation through heat exchange between the cooling water and outdoor air. When high-temperature cooling water is circulated to the second dehumidifying heat exchanger 6 along the cooling water line 20, the second dehumidifying heat exchanger 6 performs a regenerating operation using heat of the cooling water.

[0047] In addition, an indoor air line 30 that circulates indoor air and an outdoor air line 40 that circulates outdoor air are provided. Accordingly, conditioned dry air can be provided to the inside of the vehicle through the indoor air line 30, or air having high humidity generated during regeneration can be discharged to the outside through the outdoor air line 40. Here, the indoor air line 30 is configured to selectively pass indoor air through the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6. The indoor air line 30 is further configured such that air dried through the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 passes through the evaporator 4 and the heater 9 and is then provided to the inside of the vehicle. Here, the heater 9 can be a PTC heater and can operate in adjusting the temperature of conditioned air that has passed through the evaporator 4.

[0048] The outdoor air duct 40 is configured to selectively allow outdoor air to pass through the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6. The outdoor air duct 40 is further configured to discharge outdoor air that has already passed through the condenser 2 and the radiator-type heat exchanger 7 to the outside via either the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6. The indoor air duct 30 and the outdoor air duct 40 can be pipes, and a first regulating damper 35 can be installed on the indoor air duct 30, and a second regulating damper 45 can be installed on the outdoor air duct 40. Therefore, depending on whether the first regulating damper 35 and the second regulating damper 45 are open or closed, indoor air and outdoor air can selectively pass through either the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6.

[0049] In this system, the cooling water circulation direction along the cooling water line 20 is determined such that when either the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 performs a dehumidification operation, the other can perform a regeneration operation. The indoor air line 30 is configured to circulate indoor air to the dehumidifying heat exchanger performing the dehumidification operation. The outdoor air line 40 is configured to circulate outdoor air to the dehumidifying heat exchanger performing the regeneration operation, so as to exhaust the high-humidity air generated during regeneration to the outside.

[0050] Therefore, in this disclosure, the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 alternately perform dehumidification operations to reduce the cooling load and provide dry air during air conditioning, and alternately perform regeneration operations to continuously maintain dehumidification operations, thereby maintaining the effect of providing cooling load and dry air.

[0051] The present disclosure can be applied in various forms. Various embodiments of the present disclosure are described below.

[0052] According to the first embodiment, such as Figure 1 As shown, the cooling water line 20 may include a first cooling water line 21 configured to connect the first dehumidifying heat exchanger 5 to the radiator-type heat exchanger 7; a second cooling water line 22 configured to connect the second dehumidifying heat exchanger 6 to the first cooling water line 21; a third cooling water line 23 and a fourth cooling water line 24 configured to branch from the radiator-type heat exchanger 7 and connect to the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6, respectively; a fifth cooling water line 25 and a sixth cooling water line 26 configured to branch from the electronic device 8 and connect to the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6, respectively; a seventh cooling water line 27 configured to branch from the first cooling water line 21 and connect to the electronic device 8; and an eighth cooling water line 28 configured to branch from the second cooling water line 22 and connect to the electronic device 8.

[0053] Here, the first valve 81 can be located at the connection point between the first cooling water pipeline 21 and the second cooling water pipeline 22. The second valve 82 can be located at the branch point between the third cooling water pipeline 23 and the fourth cooling water pipeline 24. The third valve 83 can be located at the branch point between the fifth cooling water pipeline 25 and the sixth cooling water pipeline 26. The fourth valve 84 can be located at the branch point between the first cooling water pipeline 21 and the seventh cooling water pipeline 27. The fifth valve 85 can be located at the branch point between the second cooling water pipeline 22 and the eighth cooling water pipeline 28.

[0054] In this system, when the first dehumidifying heat exchanger 5 performs dehumidification operation and the second dehumidifying heat exchanger 6 performs regeneration operation, low-temperature cooling water flowing along the cooling water line 20 circulates to the first dehumidifying heat exchanger 5, and high-temperature cooling water flowing along the cooling water line 20 circulates to the second dehumidifying heat exchanger 6. In other words, in the cooling water line 20, low-temperature cooling water that has passed through the radiator-type heat exchanger 7 circulates to the first dehumidifying heat exchanger 5, and high-temperature cooling water that has passed through the electronic device 8 circulates to the second dehumidifying heat exchanger 6.

[0055] Here, indoor air passes through the first dehumidifying heat exchanger 5 along the indoor air duct 30. Outdoor air passes through the second dehumidifying heat exchanger 6 along the outdoor air duct 40.

[0056] More in detail, such as Figure 2 As shown, in order to perform the dehumidification operation of the first dehumidifying heat exchanger 5, the first valve 81, the second valve 82, and the fourth valve 84 are adjusted to circulate cooling water to the first cooling water line 21 and the third cooling water line 23. Through this system, the cooling water exchanges heat with the outdoor air via the radiator-type heat exchanger 7, thereby forming low-temperature cooling water. This low-temperature cooling water is supplied to the first dehumidifying heat exchanger 5, and the first dehumidifying heat exchanger 5 performs dehumidification through heat exchange between the low-temperature cooling water and the indoor air. Thus, since the indoor air moving along the indoor air line 30 is dried and its temperature is lowered to a specified temperature by the first dehumidifying heat exchanger 5, the cooling load is reduced when cooling air is formed by the evaporator 4, thereby improving energy efficiency.

[0057] Furthermore, to perform the regeneration operation of the second dehumidifying heat exchanger 6, the third valve 83 and the fifth valve 85 are adjusted to circulate cooling water to the sixth cooling water line 26, the second cooling water line 22, and the eighth cooling water line 28. Through this system, the cooling water exchanges heat with the electronic device 8, thereby forming high-temperature cooling water, which is supplied to the second dehumidifying heat exchanger 6 to regenerate the desiccant saturated in the second dehumidifying heat exchanger 6. Here, outdoor air passes through the second dehumidifying heat exchanger 6 along with the outdoor air line 40, and therefore, the moisture generated during the regeneration process of the second dehumidifying heat exchanger 6 is discharged to the outside along with the outdoor air.

[0058] On the other hand, when the first dehumidifying heat exchanger 5 performs a regeneration operation and the second dehumidifying heat exchanger 6 performs a dehumidification operation, the low-temperature cooling water flowing along the cooling water line 20 circulates to the second dehumidifying heat exchanger 6, and the high-temperature cooling water flowing along the cooling water line 20 circulates to the first dehumidifying heat exchanger 5. In other words, in the cooling water line 20, the low-temperature cooling water that has passed through the radiator-type heat exchanger 7 can circulate to the second dehumidifying heat exchanger 6, and the high-temperature cooling water that has passed through the electronic device 8 can circulate to the first dehumidifying heat exchanger 5.

[0059] Here, indoor air passes through the second dehumidifier heat exchanger 6 along the indoor air duct 30. Outdoor air passes through the first dehumidifier heat exchanger 5 along the outdoor air duct 40.

[0060] More in detail, such as Figure 3 As shown, to perform the regeneration operation of the first dehumidifying heat exchanger 5, the third valve 83 and the fourth valve 84 are adjusted to circulate cooling water to the fifth cooling water line 25 and the seventh cooling water line 27. Through this system, the cooling water exchanges heat with the electronic device 8, thereby forming high-temperature cooling water, which is circulated back to the first dehumidifying heat exchanger 5 to regenerate the desiccant saturated in the first dehumidifying heat exchanger 5. Here, outdoor air passes through the first dehumidifying heat exchanger 5 along with the outdoor air line 40, and therefore, the moisture generated during the regeneration process of the first dehumidifying heat exchanger 5 is discharged to the outside along with the outdoor air.

[0061] Furthermore, to perform dehumidification operation of the second dehumidifying heat exchanger 6, the first valve 81, the second valve 82, and the fifth valve 85 are adjusted to circulate cooling water to the second cooling water line 22 and the fourth cooling water line 24. In this system, cooling water exchanges heat with outdoor air through the radiator-type heat exchanger 7, thereby forming low-temperature cooling water. This low-temperature cooling water is supplied to the second dehumidifying heat exchanger 6, which performs dehumidification through heat exchange between the low-temperature cooling water and indoor air. Thus, because the indoor air is dried and its temperature is lowered to a specified temperature by the second dehumidifying heat exchanger 6, the latent heat load is reduced, and therefore, the cooling load is reduced when cooling air is formed by the evaporator 4, thereby improving energy efficiency.

[0062] According to the second embodiment, such as Figure 4 As shown, the radiator-type heat exchanger 7 is arranged in front of the condenser 2 on the outdoor air duct 40, and therefore, outdoor air can pass through the condenser 2 after passing through the radiator-type heat exchanger 7.

[0063] Thus, since the radiator-type heat exchanger 7 is arranged in front of the condenser 2, the outdoor air passing through the outdoor air duct 40 first exchanges heat with the radiator-type heat exchanger 7, and therefore, the heat exchanged by the cooling water increases. The radiator-type heat exchanger 7 ensures sufficient heat exchange through the cooling water, thus guaranteeing the dehumidification efficiency obtained by circulating the low-temperature cooling water to the first dehumidification heat exchanger 5 or the second dehumidification heat exchanger 6. Furthermore, since the cooling water has a high specific heat and a high flow rate, even though the condenser 2 is located after the radiator-type heat exchanger 7, there is almost no degradation in condensation performance due to the condenser 2.

[0064] In this second embodiment, the positions of the radiator-type heat exchanger 7 and the condenser 2 are reversed, and the corresponding controls related to the dehumidification and regeneration operations of the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 can be performed in the same manner as in the first embodiment.

[0065] According to the third embodiment, such as Figure 5 As shown, an auxiliary heat exchanger 50 configured to exchange heat with outdoor air may be further disposed on the cooling water line 20. The outdoor air line 40 may include a first outdoor air line 41 configured to allow outdoor air to pass through the condenser 2 and the radiator-type heat exchanger 7 before being discharged to the outside. The outdoor air line 40 may further include a second outdoor air line 42 configured to allow outdoor air to flow into it at a location different from that of the first outdoor air line 41, pass through the auxiliary heat exchanger 50, and then selectively pass through the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6.

[0066] Here, the auxiliary heat exchanger 50 is configured to use outdoor air flowing along the outdoor air duct 40 to cool the cooling water, and to perform cooling of the radiator-type heat exchanger 7 and the condenser 2, as well as cooling of the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6, respectively, through the first outdoor air duct 41 and the second outdoor air duct 42 branching from the outdoor air duct 40.

[0067] Since the first or second dehumidifying heat exchanger 5 or 6 may be damaged when the heat value of the electronic device 8 exceeds the heat required by the first or second dehumidifying heat exchanger 6, this third embodiment is implemented to prevent damage to the first or second dehumidifying heat exchanger 5 or 6. In other words, when the heat value of the electronic device 8 exceeds the heat required by the first or second dehumidifying heat exchanger 5 or 6, the temperature of the cooling water must be reduced by the radiator-type heat exchanger 7. However, in this case, due to heat exchange between the outdoor air and the condenser 2, the temperature of the cooling water may not be sufficiently reduced by the radiator-type heat exchanger 7. Furthermore, as the temperature of the cooling water decreases, the dehumidification performance of the first or second dehumidifying heat exchanger 5 or 6 increases. However, the cooling load may increase as the cooling of the electronic device 8 causes the temperature of the cooling water to rise. Therefore, in order to reduce the temperature of the cooling water, an additional heat exchanger 50 is used to isolate the low-temperature circulation and high-temperature circulation of the cooling water from each other.

[0068] like Figure 5 As shown, according to the third embodiment, the cooling water pipeline 20 includes: a first connecting pipeline 20a configured to connect the first dehumidifying heat exchanger 5 to the radiator-type heat exchanger 7; a second connecting pipeline 20b configured to connect the radiator-type heat exchanger 7 to the electronic device 8; a third connecting pipeline 20c configured to branch from the first connecting pipeline 20a and connect to the auxiliary heat exchanger 50; and a fourth connecting pipeline 20d and a fifth connecting pipeline 20e configured to branch from the auxiliary heat exchanger 50 and respectively connect to the first dehumidifying heat exchanger 5. The heat exchanger 5 is a moisture heat exchanger and the second dehumidifying heat exchanger 6; a sixth connecting line 20f and a seventh connecting line 20g are configured to branch from the electronic device 80 and connect to the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 respectively; an eighth connecting line 20h is configured to branch from the first connecting line 20a and connect to the electronic device 8; and a ninth connecting line 20i and a tenth connecting line 20j are configured to branch from the second dehumidifying heat exchanger 6 and connect to the third connecting line 20c and the radiator-type heat exchanger 7 respectively.

[0069] Here, the first regulating valve 80a can be located at the branch point between the first connecting line 20a and the third connecting line 20c. The second regulating valve 80b can be located at the connection point between the third connecting line 20c and the ninth connecting line 20i. The third regulating valve 80c can be located at the branch point between the fourth connecting line 20d and the fifth connecting line 20e. The fourth regulating valve 80d can be located at the branch point between the sixth connecting line 20f and the seventh connecting line 20g. The fifth regulating valve 80e can be located at the branch point between the first connecting line 20a and the eighth connecting line 20h. The sixth regulating valve 80f can be located at the branch point between the ninth connecting line 20i and the tenth connecting line 20j.

[0070] In this system, when the first dehumidifying heat exchanger 5 performs dehumidification operation and the second dehumidifying heat exchanger 6 performs regeneration operation, the low-temperature cooling water that has passed through the auxiliary heat exchanger 50 along the cooling water pipeline 20 circulates to the first dehumidifying heat exchanger 5, and the high-temperature cooling water that has passed through the electronic device 8 along the cooling water pipeline 20 circulates to the second dehumidifying heat exchanger 6 and the radiator-type heat exchanger 7.

[0071] Here, indoor air passes through the first dehumidifying heat exchanger 5 along the indoor air duct 30. Outdoor air passes through the condenser 2 and the radiator-type heat exchanger 7 along the first outdoor air duct 41. Outdoor air passes through the auxiliary heat exchanger 50 and the second dehumidifying heat exchanger 6 along the second outdoor air duct 42.

[0072] More in detail, such as Figure 6 As shown, in order to perform the dehumidification operation of the first dehumidifying heat exchanger 5, the first regulating valve 80a, the second regulating valve 80b, and the third regulating valve 80c are adjusted to circulate cooling water to the first connecting pipeline 20a, the third connecting pipeline 20c, and the fourth connecting pipeline 20d. Through this system, the cooling water exchanges heat with the outdoor air along the second outdoor air pipeline 42 via the auxiliary heat exchanger 50. Thus, low-temperature cooling water is formed and supplied to the first dehumidifying heat exchanger 5, and the first dehumidifying heat exchanger 5 performs dehumidification through heat exchange between the low-temperature cooling water and the indoor air in the indoor air pipeline 30. In this way, since the indoor air is dried and its temperature is lowered to a specified temperature by the first dehumidifying heat exchanger 5, the latent heat load is reduced, and therefore, the cooling load is reduced when cooling air is formed by the evaporator 4, thereby improving energy efficiency.

[0073] Further, in order to perform the regeneration operation of the second dehumidifying heat exchanger 6, the fourth adjusting valve 80d and the sixth adjusting valve 80f are adjusted so as to circulate the cooling water to the tenth connecting line 20j, the second connecting line 20b and the seventh connecting line 20g. With this system, the cooling water is heat-exchanged with the electronic device 8, and thereby high-temperature cooling water is formed, and the temperature of the cooling water is lowered by the radiator-type heat exchanger 7 before the desiccant saturated in the second dehumidifying heat exchanger 6 is regenerated. Therefore, even when the electronic device 8 is cooled, the temperature of the cooling water supplied to the second dehumidifying heat exchanger 6 does not excessively increase. This situation corresponds to a situation in which the heat generated by the electronic device 8 excessively increases. In this case, the temperature of the cooling water in the radiator-type heat exchanger 7 is lowered by heat-exchanging with the outdoor air along the first outdoor air line 41, and the cooling water having the lowered temperature is supplied to the electronic device 8. Therefore, this system can efficiently cool the electronic device 8, and prevent the temperature of the cooling water supplied to the second dehumidifying heat exchanger 6 from excessively increasing.

[0074] On the other hand, when the first dehumidifying heat exchanger 5 performs the regeneration operation and the second dehumidifying heat exchanger 6 performs the dehumidifying operation, the low-temperature cooling water having passed through the additional heat exchanger 50 along the cooling water line 20 is circulated to the second dehumidifying heat exchanger 6, and the high-temperature cooling water having passed through the electronic device 8 along the cooling water line 20 is circulated to the first dehumidifying heat exchanger 5 and the radiator-type heat exchanger 7.

[0075] Here, the indoor air passes through the second dehumidifying heat exchanger 6 along the indoor air line 30. The outdoor air passes through the condenser 2 and the radiator-type heat exchanger 7 along the first outdoor air line 41. The outdoor air passes through the additional heat exchanger 50 and the first dehumidifying heat exchanger 5 along the second outdoor air line 42.

[0076] In more detail, as Figure 7As shown, in order to perform the regeneration operation of the first dehumidifying heat exchanger 5, the first regulating valve 80a, the fourth regulating valve 80d, and the fifth regulating valve 80e are adjusted so as to circulate the cooling water to the first connecting line 20a, the second connecting line 20b, and the sixth connecting line 20f. Through this system, the cooling water is heat-exchanged with the electronic device 8, and thereby high-temperature cooling water is formed, and the temperature of the cooling water is lowered by the radiator-type heat exchanger 7 before the desiccant saturated in the second dehumidifying heat exchanger 6 by the high-temperature cooling water is regenerated. Thus, even when the electronic device 8 is cooled, the temperature of the cooling water supplied to the first dehumidifying heat exchanger 5 does not excessively increase. This case corresponds to a case where the heat generated by the electronic device 8 excessively increases. In this case, the temperature of the cooling water in the radiator-type heat exchanger 7 is lowered by heat-exchanging with the outdoor air along the first outdoor air line 41, and the cooling water having the lowered temperature is supplied to the electronic device 8. Thus, the system can efficiently cool the electronic device 8, and prevent the temperature of the cooling water supplied to the first dehumidifying heat exchanger 5 from excessively increasing.

[0077] Further, in order to perform the dehumidifying operation of the second dehumidifying heat exchanger 6, the second regulating valve 80b, the third regulating valve 80c, and the sixth regulating valve 80f are adjusted so as to circulate the cooling water to the ninth connecting line 20i, the third connecting line 20c, and the fifth connecting line 20e. Through this system, the cooling water is heat-exchanged with the outdoor air along the second outdoor air line 42 by the additional heat exchanger 50, and thereby low-temperature cooling water is formed, the low-temperature cooling water is supplied to the second dehumidifying heat exchanger 6, and the second dehumidifying heat exchanger 6 performs the dehumidifying operation by heat exchange between the low-temperature cooling water and the indoor air of the indoor air line 30.

[0078] Further, when the heat value of the electronic device 8 is insufficient, the temperature of the cooling water having passed through the electronic device 8 is low, and thus the temperature required for the regeneration of the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 is not satisfied. Thus, a measure is required which performs the smooth regeneration of the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 by circulating the high-temperature cooling water having passed through the electronic device 80 to the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6.

[0079] Thus, according to the fourth embodiment, as Figure 8 As shown, the cooling water line 20 can further include an eleventh connecting line 20k configured to branch from the ninth connecting line 20i and connected to the second connecting line 20b; a seventh regulating valve 80g can be provided at a branching point between the ninth connecting line 20i and the eleventh connecting line 20k; and an eighth regulating valve 80h can be provided at a connecting point between the eleventh connecting line 20k and the second connecting line 20b.

[0080] In more detail, when the temperature of the cooling water that has passed through the electronic device 8 does not satisfy the temperature required for the regeneration of the second dehumidifying heat exchanger 6 in the case where the second dehumidifying heat exchanger 6 is regenerated, the high-temperature cooling water that has passed through the electronic device 8 is circulated only to the second dehumidifying heat exchanger 6 along the cooling water line 20. In other words, as shown in FIG. 8, the fourth regulating valve 80d, the seventh regulating valve 80g, and the eighth regulating valve 80h are adjusted so as to circulate the cooling water to the seventh connection line 20g, the ninth connection line 20i, the eleventh connection line 20k, and the second connection line 20b. Through this system, the cooling water is circulated only to the second dehumidifying heat exchanger 6 and the electronic device 8. Accordingly, the second dehumidifying heat exchanger 6 is regenerated using the heat value of the electronic device 8. Figure 8

[0081] On the other hand, when the temperature of the cooling water that has passed through the electronic device 8 does not satisfy the temperature required for the regeneration of the first dehumidifying heat exchanger 5, the high-temperature cooling water that has passed through the electronic device 8 is circulated only to the first dehumidifying heat exchanger 5 along the cooling water line 20. In other words, as shown in FIG. 7, the fourth regulating valve 80d and the fifth regulating valve 80e are adjusted so as to circulate the cooling water to the sixth connection line 20f and the eighth connection line 20h. Through this system, the cooling water is circulated only to the first dehumidifying heat exchanger 5 and the electronic device 8. Accordingly, the first dehumidifying heat exchanger 5 is regenerated using the heat value of the electronic device 8. Figure 9

[0082] Accordingly, in the third and fourth embodiments, the temperature of the cooling water circulated to the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 is sufficiently lowered by the additional heat exchanger 50. Accordingly, the cooling efficiency of the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 is guaranteed due to the circulation of the low-temperature cooling water. In addition, by controlling the direction of circulation of the cooling water according to the heat value of the electronic device 8, not only the cooling of the electronic device 8 can be performed, but also the efficient regeneration of the first dehumidifying heat exchanger 5 or the second dehumidifying heat exchanger 6 can be performed.

[0083] In addition, as shown in FIG. 6, the indoor air line 30 and the outdoor air line 40 can be provided with the first duct valve 60 and the second duct valve 70. The first duct valve 60 can be configured to selectively circulate the indoor air or the outdoor air to the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6. The second duct valve 70 can be configured to circulate the indoor air or the outdoor air that has passed through the first dehumidifying heat exchanger 5 and the second dehumidifying heat exchanger 6 to the inside or the outside of the vehicle. The indoor air and the outdoor air can be circulated to the first duct valve 60 and the second duct valve 70. Figure 10

[0084] ​​​Accordingly, the indoor air line 30 and the outdoor air line 40 are connected through the first duct valve 60 and the second duct valve 70. Accordingly, the duct line of the indoor air line 30 and the outdoor air line 40 can be simplified. Accordingly, the first duct valve 60 and the second duct valve 70 can be a four-way valve.

[0085] Through this system, the indoor air and the outdoor air circulating along the indoor air line 30 and the outdoor air line 40 can be selectively moved to the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 by adjusting the first duct valve 60. The air that has passed through the first dehumidification heat exchanger 5 and the second dehumidification heat exchanger 6 can be provided to the inside or outside of the vehicle via the evaporator 4 and the heater 9 by adjusting the second duct valve 70.

[0086] The air conditioning system for an electric vehicle having the above-described structure reduces the heat load that the air conditioning system bears by using the desiccant-coated heat exchanger. The air conditioning system also maintains the reduced air conditioning load due to the desiccant-coated heat exchanger by dehumidification and regeneration of the desiccant-coated heat exchanger. The air conditioning system also uses waste heat generated by cooling of the electronic device when the desiccant-coated heat exchanger is regenerated to improve energy efficiency.

[0087] While embodiments of the disclosure have been disclosed for illustrative purposes, it will be understood by one of ordinary skill in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the disclosure as disclosed in the following claims.

Claims

1. An air conditioning system for an electric vehicle, the air conditioning system comprising: a refrigerant line configured to circulate a refrigerant therealong and connected to a compressor, a condenser, an expander, and an evaporator; a cooling water line configured to circulate cooling water therealong and connected to a first dehumidification heat exchanger and a second dehumidification heat exchanger to remove moisture from air, a radiator-type heat exchanger, and an electronic device, and to switch between a low-temperature cooling water circulation and a high-temperature cooling water circulation depending on whether the first dehumidification heat exchanger and the second dehumidification heat exchanger perform a dehumidification operation or a regeneration operation; an indoor air line configured to selectively pass indoor air through the first dehumidification heat exchanger and the second dehumidification heat exchanger, and to supply the indoor air that has passed through the first dehumidification heat exchanger or the second dehumidification heat exchanger to an interior of the vehicle via the evaporator and a heater; an additional heat exchanger provided on the cooling water line and configured to exchange heat with outdoor air, and an outdoor air line including a first outdoor air line configured to pass the outdoor air through the condenser and the radiator-type heat exchanger and then discharge the outdoor air to the outside, and a second outdoor air line configured to flow the outdoor air into a position different from that of the first outdoor air line, pass the outdoor air through the additional heat exchanger, and then selectively pass the outdoor air through the first dehumidification heat exchanger and the second dehumidification heat exchanger. When the first dehumidification heat exchanger performs the dehumidification operation and the second dehumidification heat exchanger performs the regeneration operation, low-temperature cooling water flowing along the cooling water line circulates to the first dehumidification heat exchanger, and high-temperature cooling water flowing along the cooling water line circulates to the second dehumidification heat exchanger.

2. The air conditioning system of claim 1, wherein, The low-temperature cooling water that has passed through the radiator-type heat exchanger circulates along the cooling water line to the first dehumidification heat exchanger, and the high-temperature cooling water that has passed through the electronic device circulates along the cooling water line to the second dehumidification heat exchanger.

3. The air conditioning system of claim 2, wherein, The indoor air passes through the first dehumidification heat exchanger along the indoor air line, and the outdoor air passes through the second dehumidification heat exchanger along the outdoor air line.

4. The air conditioning system of claim 2, wherein, When the first dehumidification heat exchanger performs the regeneration operation and the second dehumidification heat exchanger performs the dehumidification operation, low-temperature cooling water flowing along the cooling water line circulates to the second dehumidification heat exchanger, and high-temperature cooling water flowing along the cooling water line circulates to the first dehumidification heat exchanger.

5. The air conditioning system of claim 1, wherein, The low-temperature cooling water that has passed through the radiator-type heat exchanger circulates along the cooling water line to the second dehumidification heat exchanger, and the high-temperature cooling water that has passed through the electronic device circulates along the cooling water line to the first dehumidification heat exchanger.

6. The air conditioning system of claim 5, wherein, ​ 7. The air conditioning system of claim 5, wherein, The indoor air passes through the second dehumidification heat exchanger along the indoor air line, and the outdoor air passes through the first dehumidification heat exchanger along the outdoor air line.

8. The air conditioning system of claim 1, wherein, The radiator-type heat exchanger is arranged in front of the condenser on the outdoor air line, such that the outdoor air passes through the radiator-type heat exchanger and then passes through the condenser.

9. The air conditioning system of claim 1, wherein, When the first dehumidification heat exchanger performs the dehumidification operation and the second dehumidification heat exchanger performs the regeneration operation, the low-temperature cooling water that has passed through the additional heat exchanger is circulated to the first dehumidification heat exchanger along the cooling water line, and the high-temperature cooling water that has passed through the electronic device is circulated to the second dehumidification heat exchanger and the radiator-type heat exchanger along the cooling water line.

10. The air conditioning system of claim 9, wherein, When the temperature of the high-temperature cooling water that has passed through the electronic device does not satisfy a temperature required for the regeneration of the second dehumidification heat exchanger, the high-temperature cooling water that has passed through the electronic device is circulated to the second dehumidification heat exchanger along the cooling water line only. 11.The air conditioning system of claim 9, wherein: the indoor air passes through the first dehumidification heat exchanger along the indoor air line; the outdoor air passes through the condenser and the radiator-type heat exchanger along the first outdoor air line; and the outdoor air passes through the additional heat exchanger and the second dehumidification heat exchanger along the second outdoor air line.

12. The air conditioning system of claim 1, wherein, When the first dehumidification heat exchanger performs the regeneration operation and the second dehumidification heat exchanger performs the dehumidification operation, the low-temperature cooling water that has passed through the additional heat exchanger is circulated to the second dehumidification heat exchanger along the cooling water line, and the high-temperature cooling water that has passed through the electronic device is circulated to the first dehumidification heat exchanger and the radiator-type heat exchanger along the cooling water line.

13. The air conditioning system of claim 12, wherein, When the temperature of the high-temperature cooling water that has passed through the electronic device does not satisfy a temperature required for the regeneration of the first dehumidification heat exchanger, the high-temperature cooling water that has passed through the electronic device is circulated to the first dehumidification heat exchanger along the cooling water line only. 14.The air conditioning system of claim 12, wherein: the indoor air passes through the second dehumidification heat exchanger along the indoor air line; the outdoor air passes through the condenser and the radiator-type heat exchanger along the first outdoor air line; and the outdoor air passes through the additional heat exchanger and the first dehumidification heat exchanger along the second outdoor air line.

15. The air conditioning system of claim 1, wherein, The indoor air line and the outdoor air line are provided with a first duct valve configured to selectively circulate the indoor air or the outdoor air to the first dehumidification heat exchanger and the second dehumidification heat exchanger, and a second duct valve configured to circulate the indoor air or the outdoor air that has passed through the first dehumidification heat exchanger and the second dehumidification heat exchanger to the inside or outside of the vehicle, the indoor air and the outdoor air being circulated to the first duct valve and the second duct valve.

16. The air conditioning system of claim 1, wherein, A plurality of valves are provided on the cooling water line to determine a circulation path of the cooling water circulated to the first dehumidifying heat exchanger, the second dehumidifying heat exchanger, the radiator-type heat exchanger, and the electronic device according to whether the valves are opened or closed.

17. The air conditioning system of claim 1, wherein, The cooling water line includes: a first cooling water line configured to connect the first dehumidifying heat exchanger to the radiator-type heat exchanger; a second cooling water line configured to connect the second dehumidifying heat exchanger to the first cooling water line; a third cooling water line and a fourth cooling water line configured to branch from the radiator-type heat exchanger and connect to the first dehumidifying heat exchanger and the second dehumidifying heat exchanger, respectively; a fifth cooling water line and a sixth cooling water line configured to branch from the electronic device and connect to the first dehumidifying heat exchanger and the second dehumidifying heat exchanger, respectively; a seventh cooling water line configured to branch from the first cooling water line and connect to the electronic device; and an eighth cooling water line configured to branch from the second cooling water line and connect to the electronic device.

18. The air conditioning system of claim 17, wherein a first valve is provided at a connection point between the first cooling water line and the second cooling water line, a second valve is provided at a branching point between the third cooling water line and the fourth cooling water line, a third valve is provided at a branching point between the fifth cooling water line and the sixth cooling water line, a fourth valve is provided at a branching point between the first cooling water line and the seventh cooling water line, and a fifth valve is provided at a branching point between the second cooling water line and the eighth cooling water line.

19. The air conditioning system of claim 1, wherein the cooling water line includes: a first connection line configured to connect the first dehumidifying heat exchanger to the radiator-type heat exchanger, a second connection line configured to connect the radiator-type heat exchanger to the electronic device, a third connection line configured to branch from the first connection line and connect to the additional heat exchanger, a fourth connection line and a fifth connection line configured to branch from the additional heat exchanger and connect to the first dehumidifying heat exchanger and the second dehumidifying heat exchanger, respectively, a sixth connection line and a seventh connection line configured to branch from the electronic device and connect to the first dehumidifying heat exchanger and the second dehumidifying heat exchanger, respectively, an eighth connection line configured to branch from the first connection line and connect to the electronic device, and a ninth connection line and a tenth connection line configured to branch from the second dehumidifying heat exchanger and connect to the third connection line and the radiator-type heat exchanger, respectively.

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