Air conditioning method in machine room having forced air-cooling equipment housed therein

• US 5,718,628 A
• Filed: 04/26/1996
• Issued: 02/17/1998
• Est. Priority Date: 05/02/1995
• Status: Expired due to Term

• Current Assignee: Nippon Telegraph and Telephone Corporation, NTT Power and Building Facilities Incorporated
• Original Assignee: Nippon Telegraph and Telephone Corporation, NIT Power and Building Facilities Incorporated
• Inventors: Nakao, Masaki, Hayama, Hirofumi, Kishita, Manabu, Nakazato, Hideaki
• Primary Examiner(s): Joyce, Harold
• Application Number:
  US08/641,079
• Time in Patent Office: 662 Days
• Field of Search: 454/184, 454/185, 454/186, 361/678, 361/691, 361/696, 236/49.5
• US Class Current: 454/184
• CPC Class Codes: F24F 11/0001 for ventilation F24F11/30 takes precedence
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 11/76 by means responsive to temperature, e.g. bimetal springs
• CPC Class Codes: F24F 11/86 by controlling compressors within refrigeration or heat pump circuits
• CPC Class Codes: F24F 11/871 by controlling outdoor fans
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 2221/40 HVAC with raised floors
• CPC Class Codes: F24F 3/044 Systems in which all treatment is given in the central station, i.e. all-air systems
• CPC Class Codes: H05K 7/20745 within rooms for removing heat from cabinets, e.g. by air conditioning device
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The cooling air generated from an air conditioner is supplied into an air passageway formed below the floor on which an equipment is disposed. The cooling air supplied to the air passageway is guided into the equipment through an opening made in the floor. The cooling air introduced into the equipment is released into the free space within the room. Further, the air stream released into the free space of the room is partly introduced again into the equipment.

Claims

1. An air conditioning method, comprising the steps of:

supplying a cooling air generated from an air conditioner into an air passageway formed below a floor;

guiding said cooling air within said air passageway into an equipment disposed on the floor through an opening made in the floor;

releasing the cooling air introduced into said equipment into the free space within a room; and

introducing the air within the room into the equipment;

wherein the air released from within said equipment into the free space within the room is partly guided again directly into the equipment;

wherein said cooling air is prepared by sucking the air within said room into said air conditioner;

wherein the cooling air within the cooling passageway is guided into a plurality of equipments disposed on the floor; and

wherein the flow rate of the cooling air introduced into each equipment through the floor is controlled in accordance with the temperature of the cooling air supplied from the air conditioner into the space below the floor, the difference in temperature between the air released from each equipment into the free space within the room and the cooling air introduced into each equipment through the floor, and the temperature, which is set in advance, within the free space of the room.

2. The method according to claim 1, wherein:

said equipment is supported by a support member disposed in direct contact with said floor;

said cooling air within said air passageway is guided into said equipment through said floor and said support member; and

the air within said room is guided into the equipment through the support member.

3. The method according to claim 1, wherein fans for sucking said cooling air and part of the air released from each equipment into the free space within the room are arranged within each equipment disposed on the floor, and the air blowing volume of said fan is larger than the air volume sucked through the floor into the equipment.