Air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-2016348933-A1
Application number	US-201515117402-A
Country	US
Kind code	A1
Filing date	Feb 17, 2015
Priority date	Feb 21, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

An air conditioning apparatus includes a casing, a heat exchanger and a blower. In the casing, an intake port is formed and a blow-off port is formed in a top surface section. The heat exchanger and the blower are housed in the casing. The blower is caused to rotate while a flammable refrigerant flows to the heat exchanger during an operation, an intake air is taken into the casing from the intake port, a heat exchange is carried out between the flammable refrigerant and the intake air in the heat exchanger, and the heat-exchanged air is blown out from the blow-off port to an exterior of the casing. A first refrigerant sensor that detects the flammable refrigerant is disposed on a downwind side of the heat exchanger inside the casing.

First claim

1 . An air conditioning apparatus comprising:
a casing in which an intake port is formed and a blow-off port is formed in a top surface section; a heat exchanger housed in the casing; and a blower housed in the casing, the blower being caused to rotate while a flammable refrigerant flows to the heat exchanger during an operation, an intake air being taken into the casing from the intake port, a heat exchange being carried out between the flammable refrigerant and the intake air in the heat exchanger, and the heat-exchanged air being blown out from the blow-off port to an exterior of the casing, and a first refrigerant sensor arranged to detect the flammable refrigerant being disposed on a downwind side of the heat exchanger inside the casing.

2 . The air conditioning apparatus according to claim 1 , wherein
the blower is arranged on the downwind side of the heat exchanger, and the first refrigerant sensor is arranged on an upwind side of the blower.

3 . The air conditioning apparatus according to claim 2 , wherein
the first refrigerant sensor is arranged in a position nearer to the blower than to the heat exchanger.

4 . The air conditioning apparatus according to claim 1 , wherein
the blower is arranged on the downwind side of the heat exchanger, and the first refrigerant sensor is arranged in a position nearer to the blower than to the heat exchanger.

5 . The air conditioning apparatus according to claim 1 , wherein
the blower has a propeller impeller, and the first refrigerant sensor is arranged adjacent an external peripheral edge of the impeller.

6 . The air conditioning apparatus according to claim 1 , wherein
the intake port is formed below the blow-off port along side surface section of the casing, and a second refrigerant sensor arranged to detect that the flammable refrigerant is disposed at a bottom surface section of the casing.

7 . The air conditioning apparatus according to claim 1 , wherein
when the first refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

8 . The air conditioning apparatus according to claim 6 , wherein
when the first refrigerant sensor or the second refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

9 . The air conditioning apparatus according to claim 2 , wherein
the blower has a propeller impeller, and the first refrigerant sensor is arranged adjacent an external peripheral edge of the impeller.

10 . The air conditioning apparatus according to claim 2 , wherein
the intake port is formed below the blow-off port along a side surface section of the casing, and a second refrigerant sensor arranged to detect that the flammable refrigerant is disposed at a bottom surface section of the casing.

11 . The air conditioning apparatus according to claim 2 , wherein
when the first refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

12 . The air conditioning apparatus according to claim 3 , wherein
the blower has a propeller impeller, and the first refrigerant sensor is arranged adjacent an external peripheral edge of the impeller.

13 . air conditioning apparatus according to claim 3 , wherein
the intake port is formed below the blow-off port along a side surface section of the casing, and a second refrigerant sensor arranged to detect that the flammable refrigerant is disposed at a bottom surface section of the casing.

14 . The air conditioning apparatus according to claim 3 , wherein
when the first refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

15 . The air conditioning apparatus according to claim 4 , wherein
the blower has a propeller impeller, and the first refrigerant sensor is arranged adjacent an external peripheral edge of the impeller.

16 . The air conditioning apparatus according to claim 4 , wherein
the intake port is formed below the blow-off port along a side surface section of the casing, and a second refrigerant sensor arranged to detect that the flammable refrigerant is disposed at a bottom surface section of the casing.

17 . The air conditioning apparatus according to claim 4 , wherein
when the first refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

18 . The air conditioning apparatus according to claim 5 , wherein
the intake port is formed below the blow-off port along a side surface section of the casing, and a second refrigerant sensor arranged to detect that the flammable refrigerant is disposed at a bottom surface section of the casing.

19 . The air conditioning apparatus according to claim 5 , wherein
when the first refrigerant sensor has detected the flammable refrigerant, the blower is caused to rotate in a state in which the flammable refrigerant is not allowed to flow to the heat exchanger.

Assignees

• Daikin Ind Ltd

Inventors

• Takeuchi Tomohisa
• Kawano Satoshi
• Matsuoka Shinya

Classifications

• F24F11/84 Primary

  using valves · CPC title

• F24F1/50

  with outlet air in upward direction · CPC title

• F24F11/36

  to leakage of heat-exchange fluid · CPC title

• F25B49/005

  of safety devices (F25B49/02 and F25B49/04 take precedence) · CPC title

• F25B2400/12

  Inflammable refrigerants · CPC title