Measuring and testing – With fluid pressure – Leakage
Patent
1997-12-24
1999-06-01
Williams, Hezron
Measuring and testing
With fluid pressure
Leakage
137 784, 137557, 340605, 37910601, G01M 328
Patent
active
059089806
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a safety control system for user's gas facilities, and more particularly to an integrated safety control system and a gas leakage recognizing method enabling the user to easily check the gas leakage for the entire user's gas conduit including a gas meter and to manipulate the gas valve by remote control through the telephone so that the gas valve can be automatically cut off.
BACKGROUND ART
Although a variety of safety control systems have been known, they have no function to automatically check the entire user's gas conduit including the gas meter. They can check only a particular gas conduit portion. In accordance with conventional gas leakage checking methods, the gas leakage can be checked only when the internal pressure of the gas conduit is decreased to a certain pressure. For this reason, where gas is leaked in a low rate, one hour or more is taken to sense this gas leakage.
Taking into consideration the fact that the gas supplied to the home has a pressure ranging from 100 to 250 mmH.sub.2 O, the reference pressure for checking the gas leakage is typically determined to range from 50 to 80 mmH.sub.2 O. Since the actual average gas supply pressure is about 200 mmH.sub.2 O, a lot of time is taken for the pressure of the entire gas conduit to decrease from 200 mmH.sub.2 O to 50 mmH.sub.2 O.
In accordance with the conventional methods, gas leakage can be checked only after the user closes the gas valve because this checking is based on the internal pressure of the gas conduit. As a result, there is a problem that the user cannot use the gas while checking for leakage. This makes it impossible to check the gas leakage for a long period of time.
For systems having a function to check the hose connected between the gas conduit and the gas range, it is possible to achieve the checking in a short period of time. However, these systems cannot achieve the gas leakage checking for the entire gas conduit because the checking is limited to a particular gas conduit portion such as the hose or the gas range. For this reason, these systems are insufficiently safe.
DISCLOSURE OF INVENTION
Therefore, the present invention has been made in view of the above-mentioned problems and an object of the invention is to provide an integrated safety control system for user's gas facilities and a gas leakage recognizing method using the integrated safety control system, enabling the user to easily check the gas leakage for the entire user's gas conduit and to manipulate the gas valve by remote control through the telephone so that the gas valve can be cut off, and capable of automatically cutting off the gas valve when an abnormal pressure is generated in the gas conduit and of always displaying the gas supply pressure.
In accordance with one aspect, the present invention provides an integrated safety control system for a user's gas facility, comprising: a controller unit for outputting control signals respectively based on input signals received thereto, thereby controlling the entire system; a driver unit for driving the entire system in accordance with the control signals from the controller unit; a first transmitter/receiver unit equipped in the driver unit, the first transmitter/receiver unit serving to receive the control signals from the controller unit and to transmit data from the driver unit to the controller unit; and a second transmitter/receiver unit equipped in the controller unit, the second transmitter/receiver unit serving to transmit the control signals from the controller unit to the driver unit and to receive the data transmitted from the driver unit.
In accordance with another aspect, the present invention provides a method for recognizing a gas leakage occurring in a user's gas facility using an integrated safety control system including a driver unit for opening and closing a gas valve equipped in the gas facility, and a controller unit for controlling the driver unit, the controller unit having a gas leakage check switch, comprising the steps of: (a
REFERENCES:
patent: 4787410 (1988-11-01), Fujieda et al.
patent: 5151932 (1992-09-01), Arizumi et al.
patent: 5539384 (1996-07-01), Frasier
patent: 5586050 (1996-12-01), Makel et al.
patent: 5655561 (1997-08-01), Wendel et al.
Cho Woon Sik
Hwang Jung Hoon
Lee Sang Woo
Song Ho Young
Larkin Daniel S.
Tae Gu City Gas Co. Ltd
Williams Hezron
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