Patent EP0281762A2 successfully refreshed from Google Patents.
EP0281762A2
Expired / Lapsed
EP
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Air conditioning system for buildings
Assignee: Shinko Electric Industries Co Ltd
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Filing: 1988-02-04
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Granted: —
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Expires: 2008-02-04
Abstract
Abstract The system includes a plurality of air conditioners (1) on the different floors, a cooling heat pipe (7, 9) of a gravity type for connecting a vaporizer (3) in the air conditioners with a cold thermal source (10) installed on a top of the building and a warming heat pipe (6, 8) of a gravity type for connecting a condenser (2) of the air conditioners with a hot thermal source (11) installed on a basement of the building. The heat pipes are, respectively, provided with flow control valves (23, 24), at inlet to the vaporizer and the outlet from the condenser. Each air conditioner is provided with a thermistor (22) for detecting the temperature of the returning air and a liquid level detection switch (26) for detecting the liquid level of the thermal medium in the vaporizer. The flow control valves are respectively controlled based on the detection signals from the thermistor and the liquid level detection switch.
Inventors
- 👤 Tetsuo C/O Takenaka Komuten Co. Ltd. Yamada
- 👤 Yoshinori C/O Takenaka Komuten Co. Ltd. Inoue
- 👤 Sinji C/O Takenaka Komuten Co. Ltd. Miura
- 👤 Masao C/O Takenaka Komuten Co. Ltd. Endo
- 👤 Tadahiro C/O Takenaka Komuten Co. Ltd. Fukunaga
- 👤 Yashutoshi C/O Sinko Kogyo Co. Ltd. Yoshida
- 👤 Setsuo C/O Sinko Kogyo Co. Ltd. Kaneda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 18:12
CPC Classifications
F; F24; F24F; F24F3/00; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F24F11/00; F24F11/70; F24F11/80; F24F11/83; F24F11/84; F24F3/06; F24F3/08; F28D15/06; F25; F25B; F25B25/00; F25B25/005; F25B29/00; F25B29/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
257 words
An air conditioning system for buildings which comprises: a cold thermal source which is installed at a high place in said building, a hot thermal source which is installed at a low place in said building, air conditioners which are installed at various heights between said cold and hot thermal sources and each of which has, respectively, a condenser as a heat exchanger for warming air in air-conditioned location, a vaporizer as a heat exchanger for cooling the air in the air-conditioned location and a fan for blowing air into the air-conditioned location through said condenser and vaporizer, a cooling heat pipe of a gravity type by which the vaporizers of said air conditioners is connected with said cold thermal source, and in which thermal medium is filled so as to circulate therein, a warming heat pipe of a gravity type by which the condensers of said air conditioners is connected with said hot thermal source and in which thermal medium is filled so as to circulate therein, temperature sensors for detecting temperature of the air in the air-conditioned locations, flow control valves which are respectively incorporated in the heat pipes at inlets of said vaporizers and at outlets of said condensers, liquid level detection means for detecting a predetermined level of the thermal medium in liquid phase in the vaporizer, and controllers which control, respectively, the flow control valves base on detection signals supplied from the temperature sensors and the liquid level detection means so that the air in the air-conditioned locations meet a set point.
Claim 2
Dependent Claim
257 words
An air conditioning system for buildings which comprises: a cold thermal source which is installed at a high place in said building, a hot thermal source which is installed at a low place in said building, air conditioners which are installed at various heights between said cold and hot thermal sources and each of which has, respectively, a condenser as a heat exchanger for warming air in air-conditioned location, a vaporizer as a heat exchanger for cooling the air in the air-conditioned location and a fan for blowing air into the air-conditioned location through said condenser and vaporizer, a cooling heat pipe of a gravity type by which the vaporizers of said air conditioners is connected with said cold thermal source, and in which thermal medium is filled so as to circulate therein, a warming heat pipe of a gravity type by which the condensers of said air conditioners is connected with said hot thermal source and in which thermal medium is filled so as to circulate therein, temperature sensors for detecting temperature of the air in the air-conditioned locations, flow control valves which are respectively incorporated in the heat pipes at inlets of said vaporizers and at outlets of said condensers, liquid level detection means for detecting a predetermined level of the thermal medium in liquid phase in the vaporizer, and controllers which control, respectively, the flow control valves base on detection signals supplied from the temperature sensors and the liquid level detection means so that the air in the air-conditioned locations meet a set point.
Claim 3
Dependent Claim
28 words
An air conditioning system as claimed in claim 1, wherein revolution of the fan is controlled by said controller based on the detection signal from said temperature sensor.
Claim 4
Dependent Claim
67 words
An air conditioning system as claimed in claim 1, wherein said liquid level detection means comprises; a bypass which is connected with the cooling heat pipe for thermal medium in liquid phase and with the cooling heat pipe for thermal medium in vapor phase in parallel with said vaporizer, and a liquid level detection switch for detecting level of thermal medium in liquid phase in said bypass.
Claim 5
Dependent Claim
42 words
An air conditioning system as claimed in claim 3, wherein said liquid level detection switch is mounted on said bypass so as to detect such a condition that the thermal medium in liquid phase comes substantially over uppermost fin of said vaporizer.
Claim 6
Dependent Claim
126 words
An air conditioning system as claimed in claim 1, wherein said flow control valve comprises: a housing downwardly extending from said heat pipe for thermal medium in liquid phase which extends horizontally, an electromagnet surrounding a periphery of said heat pipe at a position above said housing, and a valve which is accommodated in said housing so as to be movable upwardly and downwardly in said housing and which comprises a support member and a flexible bag secured on a top of said support member and accommodating magnetic liquid therein, whereby, when said electromagnet is excited, said valve is attracted by said electromagnet so that said bag is brought into a tight contact with an inner periphery of said heat pipe to close said heat pipe.
References Cited (Backward Citations)
No citation records indexed.
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