Air conditioning apparatus

1. An air conditioning apparatus comprising:

an outdoor unit configured to circulate refrigerant;

at least one indoor unit configured to circulate water; and

a heat exchange device that connects the outdoor unit to the at least one indoor unit, the heat exchange device comprising:

at least one heat exchanger configured to exchange heat between the refrigerant and the water,

a first heat exchanger water pipe that extends from the at least one heat exchanger toward an outlet of the at least one indoor unit and that is configured to guide water received from the at least one indoor unit to the at least one heat exchanger,

a second heat exchanger water pipe that extends from the at least one heat exchanger toward an inlet of the at least one indoor unit and that is configured to guide water received from the at least one heat exchanger to the inlet of the at least one indoor unit,

a first bypass pipe that extends from the first heat exchanger water pipe to the second heat exchanger water pipe and that is configured to guide the water received from the at least one heat exchanger through the first heat exchanger water pipe to the second heat exchanger water pipe,

a second bypass pipe that extends from the first heat exchanger water pipe to the second heat exchanger water pipe and that is configured to guide the water received from the at least one indoor unit through the first heat exchanger water pipe to the second heat exchanger water pipe such that the water received from the at least one indoor unit is not introduced to the at least one heat exchanger,

a first switching valve installed in the first bypass pipe and configured to open and close the first bypass pipe, and

a second switching valve installed in the second bypass pipe and configured to open and close the second bypass pipe.

2. The air conditioning apparatus according to claim 1 , wherein the first bypass pipe extends from a first branch part disposed at the first heat exchanger water pipe to a first connection disposed at the second heat exchanger water pipe.

3. The air conditioning apparatus according to claim 2 , wherein the second bypass pipe extends from a second branch part disposed at the first heat exchanger water pipe to a second connection disposed at the second heat exchanger water pipe.

4. The air conditioning apparatus according to claim 3 , wherein the second branch part is disposed between the heat exchanger and the first branch part of the first heat exchanger water pipe.

5. The air conditioning apparatus according to claim 3 , further comprising a third switching valve installed in the first heat exchanger water pipe.

6. The air conditioning apparatus according to claim 5 , wherein the third switching valve is installed between the first branch part and the second branch part of the first heat exchanger water pipe, the third switching valve being configured to:

based on the air conditioning apparatus performing a first mode, open the first heat exchanger water pipe to allow the water in the first heat exchanger water pipe to be introduced into the at least one heat exchanger, and

based on the air conditioning apparatus performing a second mode different from the first mode, close the first heat exchanger water pipe to allow the water in the first heat exchanger water pipe to move to the first bypass pipe.

7. The air conditioning apparatus according to claim 5 , further comprising a fourth switching valve installed in the second heat exchanger water pipe.

8. The air conditioning apparatus according to claim 7 , wherein the fourth switching valve is installed between the first connection and the second connection of the second heat exchanger water pipe, the fourth switching valve being configured to:

based on the air conditioning apparatus performing a first mode, open the second heat exchanger water pipe to allow the water in the second heat exchanger water pipe to be introduced into the at least one indoor unit, and

based on the air conditioning apparatus performing a second mode different from the second mode, close the second heat exchanger water pipe to block the water in the second heat exchanger water pipe from being introduced into the at least one indoor unit.

9. The air conditioning apparatus according to claim 1 , further comprising:

a first outdoor unit connection pipe and a second outdoor unit connection pipe that connect the outdoor unit to the heat exchange device;

a first heat exchanger refrigerant pipe that is connected to the first outdoor unit connection pipe and that extends to a first port of the at least one heat exchanger; and

a second heat exchanger refrigerant pipe that is connected to the second outdoor unit connection pipe and that extends to a second port of the at least one heat exchanger.

10. The air conditioning apparatus according to claim 9 , wherein the first heat exchanger water pipe connects to a third port of the at least one heat exchanger, and

wherein the second heat exchanger water pipe connects to a fourth port of the at least one heat exchanger.

11. The air conditioning apparatus according to claim 10 , wherein the at least one heat exchanger comprises:

a refrigerant passage that extends from the first port to the second port and that is configured to guide the refrigerant in the at least one heat exchanger along a first direction; and

a water passage that extends from the third port to the fourth port and that is configured to guide the water in the at least one heat exchanger along a second direction opposite to the first direction.

12. The air conditioning apparatus according to claim 10 , wherein the first port and the second port are disposed at a first surface of the at least one heat exchanger,

wherein the third port and the fourth port are disposed at a second surface of the at least one heat exchanger, and

wherein the first port and the fourth port face each other, and the second port and the third port face each other.

13. The air conditioning apparatus according to claim 9 , wherein the at least one indoor unit comprises a first indoor unit and a second indoor unit,

wherein the at least one heat exchanger comprises a first heat exchanger fluidly connected to the first indoor unit and a second heat exchanger fluidly connected to the second indoor unit, and

wherein the first heat exchanger refrigerant pipe and the second heat exchanger refrigerant pipe are connected to the first heat exchanger.

14. The air conditioning apparatus according to claim 13 , further comprising:

a third outdoor unit connection pipe that connects the outdoor unit to the heat exchange device;

a third heat exchanger refrigerant pipe that is connected to the third outdoor unit connection pipe and that extends to a first port of the second heat exchanger; and

a fourth heat exchanger refrigerant pipe that extends from the second heat exchanger refrigerant pipe to a second port of the second heat exchanger.

15. The air conditioning apparatus according to claim 14 , further comprising an internal expansion valve installed in the fourth heat exchanger refrigerant pipe.

16. The air conditioning apparatus according to claim 1 , wherein the at least one heat exchanger comprises one or more plates.

17. An air conditioning apparatus comprising:

an outdoor unit configured to circulate refrigerant;

a first indoor unit and a second indoor unit that are configured to circulate water; and

a heat exchange device that connects the outdoor unit to the first and second indoor units, the heat exchange device comprising:

a first heat exchanger and a second heat exchanger that are configured to perform heat exchange between the refrigerant and the water,

a plurality of heat exchanger water pipes that connect the first and second heat exchangers to the first and second indoor units, respectively, and that are configured to guide water (i) between the first indoor unit and the first heat exchanger and (ii) between the second indoor unit and the second heat exchanger,

a plurality of outdoor unit connection pipes that connect the outdoor unit to the heat exchange device,

a plurality of heat exchanger refrigerant pipes that are connected to the plurality of outdoor unit connection pipes and that extend to ports of the first and second heat exchangers, and

at least one bypass pipe that connects the plurality of heat exchanger water pipes to each other and that is configured to bypass water flowing through one of the plurality of heat exchanger water pipes to another of the plurality of heat exchanger water pipes,

wherein the plurality of outdoor unit connection pipes comprise at least three pipes that connect the outdoor unit to the plurality of heat exchanger refrigerant pipes, respectively.

18. The air conditioning apparatus according to claim 17 , wherein the plurality of heat exchanger water pipes comprise a first heat exchanger water pipe and a second heat exchanger water pipe, and

wherein the at least one bypass pipe comprises:

a first bypass pipe that extends from a first branch part disposed at the first heat exchanger water pipe to a first connection disposed at the second heat exchanger water pipe; and

a second bypass pipe that extends from a second branch part disposed at the first heat exchanger water pipe to a second connection disposed at the second heat exchanger water pipe.

19. The air conditioning apparatus according to claim 17 , wherein the plurality of outdoor unit connection pipes comprise a first outdoor unit connection pipe, a second outdoor unit connection pipe, and a third outdoor unit connection pipe, and

wherein the plurality of heat exchanger refrigerant pipes comprise:

a first heat exchanger refrigerant pipe that is connected to the first outdoor unit connection pipe and that extends to a first port of the first heat exchanger;

a second heat exchanger refrigerant pipe that is connected to the second outdoor unit connection pipe and that extends to a second port of the first heat exchanger;

a third heat exchanger refrigerant pipe that is connected to the third outdoor unit connection pipe and that extends to a first port of the second heat exchanger; and

a fourth heat exchanger refrigerant pipe that is branched from the second heat exchanger refrigerant pipe and that extends to a second port of the second heat exchanger.

20. The air conditioning apparatus according to claim 19 , further comprising:

a first service valve connected to the first outdoor unit connection pipe and the first heat exchanger refrigerant pipe;

a second service valve connected to the second outdoor unit connection pipe and the second heat exchanger refrigerant pipe; and

a third service valve connected to the third outdoor unit connection pipe and the third heat exchanger refrigerant pipe.