Air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-11397015-B2
Application number	US-202016849656-A
Country	US
Kind code	B2
Filing date	Apr 15, 2020
Priority date	Apr 15, 2019
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

An air conditioning apparatus includes a heat exchange device that connects an outdoor unit to an indoor unit and that includes a heat exchanger configured to perform heat exchange between refrigerant and water, thereby reducing an amount of refrigerant used to perform a cooling operation or a heating operation. The apparatus further includes a switching mechanism that connects the outdoor unit to the heat exchange device and that is configured to be connected to both a simultaneous outdoor unit and a switchable outdoor unit to thereby allow the heat exchange device to be installed regardless of the type of the outdoor unit.

First claim

What is claimed is:

1. An air conditioning apparatus comprising:
an outdoor unit configured to circulate refrigerant, the outdoor unit comprising a compressor and an outdoor heat exchanger;
an indoor unit configured to circulate water;
a first heat exchanger and a second heat exchanger that are configured to perform heat exchange between the refrigerant and the water;
a first four-way valve disposed at one side of the first heat exchanger and configured to adjust a flow direction of the refrigerant in the first heat exchanger;
a second four-way valve disposed at one side of the second heat exchanger and configured to adjust a flow direction of the refrigerant the second heat exchanger;
a first connection pipe connected to the outdoor unit and to a first port of the first four-way valve;
a second connection pipe connected to a second port of the first four-way valve and to the first heat exchanger;
a third connection pipe connected to a third port of the first four-way valve;
a fourth connection pipe connected to the first heat exchanger;
a first expansion valve installed at the fourth connection pipe;
at least one bypass pipe configured to connect two connection pipes among the first connection pipe, the third connection pipe, and the fourth connection pipe to each other, the at least one bypass pipe being configured to guide the refrigerant between the two connection pipes; and
at least one bypass valve installed at the at least one bypass pipe,
wherein the at least one bypass pipe comprises:
a first bypass pipe connected to a first bypass branch part disposed at the first connection pipe and to a second bypass branch part disposed at the third connection pipe, and
a second bypass pipe connected to a third bypass branch part disposed at the first connection pipe and to a fourth bypass branch part disposed at the fourth connection pipe.

2. The air conditioning apparatus according to claim 1 , wherein the at least one bypass valve comprises a first bypass valve installed at the first bypass pipe.

3. The air conditioning apparatus according to claim 1 , wherein the at least one bypass valve comprises a first bypass valve installed at the first bypass pipe and a second bypass valve installed at the second bypass pipe.

4. The air conditioning apparatus according to claim 3 , wherein the at least one bypass pipe further comprises a third bypass pipe connected to a fifth bypass branch part disposed at the third connection pipe and to a sixth bypass branch part disposed at the fourth connection pipe.

5. The air conditioning apparatus according to claim 4 , wherein the at least one bypass valve comprises a third bypass valve installed at the third bypass pipe.

6. The air conditioning apparatus according to claim 4 , further comprising a first check valve installed at the first bypass pipe, a second check valve installed at the second bypass pipe, and a third check valve installed at the third bypass pipe.

7. The air conditioning apparatus according to claim 6 , wherein the third check valve is installed at a point between the second bypass branch part and the fifth bypass branch part.

8. The air conditioning apparatus according to claim 1 , further comprising:
a first branch part disposed at the first connection pipe; and
a fifth connection pipe connected to the first branch part and to a first port of the second four-way valve.

9. The air conditioning apparatus according to claim 8 , further comprising:
a sixth connection pipe connected to a second port of the second four-way valve and to the second heat exchanger.

10. The air conditioning apparatus according to claim 9 , further comprising:
a second branch part disposed at the third connection pipe;
a third branch part disposed at the fourth connection pipe;
a seventh connection pipe connected to the second heat exchanger and to the third branch part; and
a second expansion valve installed at the seventh connection pipe.

11. The air conditioning apparatus according to claim 10 , further comprising:
an eighth connection pipe connected to the second branch part and to a third port of the second four-way valve.

12. The air conditioning apparatus according to claim 1 , further comprising:
a first outdoor unit connection pipe disposed in the outdoor unit and connected to the first connection pipe;
a second outdoor unit connection pipe disposed in the outdoor unit and connected to the third connection pipe; and
a third outdoor unit connection pipe disposed in the outdoor unit and connected to the fourth connection pipe.

13. The air conditioning apparatus according to claim 1 , further comprising:
a first outdoor unit connection pipe connected to the outdoor unit and to the third connection pipe; and
a second outdoor unit connection pipe connected to the outdoor unit and to the fourth connection pipe.

14. The air conditioning apparatus according to claim 1 , wherein the indoor unit comprises:
a first indoor unit connected to the first heat exchanger; and
a second indoor unit connected to the second heat exchanger.

15. An air conditioning apparatus comprising:
an outdoor unit configured to circulate refrigerant;
an indoor unit configured to circulate water;
a first heat exchanger and a second heat exchanger that are configured to perform heat exchange between the refrigerant and the water, each of the first heat exchanger and the second heat exchanger being fluidly connected to the outdoor unit and the indoor unit;
a first four-way valve disposed at one side of the first heat exchanger and configured to adjust a flow direction of the refrigerant in the first heat exchanger;
a second four-way valve disposed at one side of the second heat exchanger and configured to adjust a flow direction of the refrigerant in the second heat exchanger;
a first connection pipe connected to the outdoor unit and to a first port of the first four-way valve;
a second connection pipe connected to a second port of the first four-way valve and to the first heat exchanger;
a third connection pipe connected to a third port of the first four-way valve;
a fourth connection pipe connected to the first heat exchanger;
a first bypass pipe connected to a first bypass branch part disposed at the first connection pipe and to a second bypass branch part disposed at the third connection pipe;
a first bypass valve installed at the first bypass pipe;
a second bypass pipe connected to a third bypass branch part disposed at the first connection pipe and to a fourth bypass branch part disposed at the fourth connection pipe; and
a second bypass valve installed at the second bypass pipe.

16. The air conditioning apparatus according to claim 15 , further comprising
a first expansion valve installed at the fourth connection pipe.

17. The air conditioning apparatus according to claim 16 , further comprising:
a third bypass pipe connected to a fifth bypass branch part disposed at the third connection pipe and to a sixth bypass branch part disposed at the fourth connection pipe; and
a third bypass valve installed at the third bypass pipe.

18. The air conditioning apparatus according to claim 16 , further comprising:
a fifth connection pipe connected to a first branch part disposed at the first connection pipe and to a first port of the second four-way valve;
a sixth connection pipe connected to a second port of the second four-way valve and to the second heat exchanger;
a seventh connection pipe connected to the second heat exchanger and to a third branch part disposed at the fourth connect

Assignees

• Lg Electronics Inc

Inventors

• Song Chiwoo
• Sa Yongcheol
• Shin Ilyoong
• Lee Jisung

Classifications

• F24F11/84

  using valves · CPC title

• F25B13/00 Primary

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F25B41/40

  Fluid line arrangements · CPC title

• F25B41/26

  of fluid flow reversing valves · CPC title

• F25B2313/02742

  using two four-way valves · CPC title