Claims
- 1. An air-conditioning system wherein a single heat source unit having a compressor, a four-way valve, a heat source unit side heat exchanger and an accumulator is connected to a plurality of indoor units having an indoor side heat exchanger and a first flow rate controller through first and second connection pipes;
- a first branch joint including a valve device for selectively connecting one of said plurality of indoor units to said first connection pipe or said second connection pipe and a second branch joint connected to another of said indoor side heat exchangers of said plurality of indoor units through said first flow rate controller and connected to said second connection pipe through said second flow rate controller are connected to each other through a second flow rate controller and a gas-liquid separating unit;
- said second branch joint and said first connection pipe are connected through a fourth flow rate controller;
- said second branch joint and said first connection pipe are connected through a bypass pipe having a third flow rate controller therein; and
- said air conditioning system comprises;
- a first heat exchanger portion for carrying out a heat-exchange between said bypass pipe between said third flow rate controller and said first connection pipe and pipings connecting said second connection pipe and said second flow rate controller;
- a flow path change over unit for allowing, when said heat source unit side heat exchanger is operated as a condenser, a flow of a refrigerant from a refrigerant outlet side of said condenser only to said second connection pipe and a flow of the refrigerant from said first connection pipe only to said four-way valve side, and allowing, when said heat source unit side heat exchanger is operated as an evaporator, a flow of the refrigerant from said first connection pipe only to a refrigerant inlet side of said evaporator and a flow of the refrigerant from said four-way valve only to said second connection pipe; and
- a junction unit disposed between said plurality of heat source units, said junction unit comprising said first branch joint, said second branch joint, a gas-liquid separator, said second flow rate controller, said third flow rate controller, said fourth flow rate controller, said first heat exchanger portion and said bypass pipes;
- characterized by the provision of:
- suction air temperature detecting means for detecting a suction air temperature of said plurality of indoor units;
- opening degree setting means for setting a minimum valve opening degree of said first flow rate controller in response to a difference between a detected temperature of said suction air temperature detection means and a predetermined target temperature; and
- first valve opening degree controlling means for controlling the valve opening degree of said first flow rate controller at a predetermined rate determined by said first valve opening degree controlling means such that said first flow rate controller is moved to said minimum valve opening degree set by said opening degree setting means at said predetermined rate.
- 2. The air conditioning system of claim 1, further including means for controlling movement of the first flow rate controller in response to a difference between an outlet superheat value and a target superheat value where the difference between a detected temperature and the predetermined target temperature exceed a predetermined value.
Priority Claims (13)
Number |
Date |
Country |
Kind |
3-001616 |
Jan 1991 |
JPX |
|
3-004841 |
Jan 1991 |
JPX |
|
3-008360 |
Jan 1991 |
JPX |
|
3-010415 |
Jan 1991 |
JPX |
|
3-010710 |
Jan 1991 |
JPX |
|
3-010711 |
Jan 1991 |
JPX |
|
3-014031 |
Feb 1991 |
JPX |
|
3-014162 |
Feb 1991 |
JPX |
|
3-014200 |
Feb 1991 |
JPX |
|
3-026000 |
Feb 1991 |
JPX |
|
3-026001 |
Feb 1991 |
JPX |
|
3-064631 |
Mar 1991 |
JPX |
|
3-300615 |
Nov 1991 |
JPX |
|
Parent Case Info
This is a division, of application Ser. No. 07/814,558, filed on Dec. 30, 1991, now U.S. Pat. No. 5,237,833.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4621505 |
Ares et al. |
Nov 1986 |
|
4760707 |
Dennis et al. |
Aug 1988 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
0119024 |
Sep 1984 |
EPX |
0129640 |
Jun 1987 |
JPX |
0096438 |
Apr 1988 |
JPX |
2194651 |
Mar 1988 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
814558 |
Dec 1991 |
|