KR20230059539A - Liquefied gas used automatic fire extinguishing system and its control method - Google Patents

Abstract

Disclosed are an automatic fire extinguishing system using liquefied gas and a control method thereof. The automatic fire extinguishing system includes: a liquefied gas generation device generating and storing liquefied gas, and supplying the liquefied gas in accordance with a request for the supply of the liquefied gas; a liquefied gas storage device requesting the liquefied gas generation device for the supply of the liquefied gas, storing the liquefied gas supplied from the liquefied gas generation device, supplying the stored liquefied gas when detecting a fire, and discharging the vaporized liquefied gas to the liquefied gas generation device in accordance with a request for the supply of the liquefied gas generation device; and a liquefied gas fire extinguishing device providing fire detection information to the liquefied gas storage device, and spraying the liquefied gas supplied under the control of the liquefied gas storage device. Therefore, the automatic fire extinguishing system can supply the liquefied gas required for fire extinguishing while re-liquefying the vaporized liquefied gas, thereby improving energy efficiency.

Description

Automatic extinguishing system using liquefied gas and its control method {LIQUEFIED GAS USED AUTOMATIC FIRE EXTINGUISHING SYSTEM AND ITS CONTROL METHOD}

The present invention (Disclosure) relates to an automatic fire extinguishing system using liquefied gas and a control method therefor, and specifically, while generating and storing liquefied gas in a liquefied gas generator, liquefied gas is converted into liquefied gas according to a request for supply of liquefied gas. It is supplied and stored as a storage device, and when a fire such as an energy storage system (ESS) is detected, the stored liquefied gas (eg, liquid nitrogen (LN2) or nitrogen (GN2)) is transferred to the liquefied gas fire extinguishing device. The liquefied gas required for fire extinguishing is supplied and the vaporized liquefied gas is discharged from the liquefied gas storage device to the liquefied gas generator according to the supply request from the liquefied gas generator. It relates to an automatic fire extinguishing system using liquefied gas that can be re-liquefied to improve energy efficiency and a control method thereof.

Here, background art related to the present invention is provided, and they do not necessarily mean prior art (This section provides background information related to the present disclosure which is not necessarily prior art).

When a fire breaks out in various buildings such as buildings and factories, it can be extinguished by spraying haron, CO2, etc., which are generally gas-based fire extinguishing agents, or fire extinguishing powder, water, etc., at high pressure.

In the case of a fire extinguishing system using a gas-based fire extinguishing agent as described above, a drug storage container filled with fire extinguishing agent must be provided, and among gas-based fire extinguishing agents, clean fire extinguishing agents can only be stored in a gaseous state in a container at room temperature, while other Fire extinguishing agents can be stored in a highly evaporative liquefied state at room temperature.

On the other hand, liquefied gas (eg, liquid nitrogen (LN2), nitrogen (GN2), etc.) is maintained in a liquefied state during transportation or storage, and for this purpose, a cryogenic storage tank is used. vacuum) to keep heat in and out, but since heat cannot be completely blocked, the liquefied gas stored in the cryogenic storage tank is naturally partially vaporized and gaseous liquefied gas exists, which is called BOG (boil- off gas).

Since the pressure of BOG generated in the upper part of the cryogenic storage tank is inversely proportional to the amount of liquid liquefied gas that can be filled in the cryogenic storage tank, it must be properly controlled to be maintained below the prescribed pressure.

On the other hand, when gas is supplied to the cryogenic storage tank to generate liquefied gas, the refrigerator cools the inside of the cryogenic storage tank to a liquefiable temperature (for example, 77 K). It takes about several hours, and at this time, there is a problem in that the supplied gas is continuously discharged and wasted until the internal temperature of the storage tank (ie, the temperature of the refrigerator) reaches a temperature at which it can be liquefied.

In addition, the liquefied gas filled in the liquefied gas storage device provided in the fire extinguishing device is continuously vaporized while supplying the necessary amount of liquefied gas to the fire extinguishing device using liquefied gas to extinguish the fire. There is a problem in that it is discharged and continuously wasted.

1. Korea Patent Registration No. 10-1168210 (registered on July 13, 2012)

The present invention (Disclosure) supplies and stores the liquefied gas to the liquefied gas storage device according to the supply request of the liquefied gas while generating and storing the liquefied gas in the liquefied gas generator, and liquefies the stored liquefied gas when a fire is detected. It is supplied to the gas fire extinguishing device and sprayed to the area where the fire occurs, and the liquefied gas storage device discharges the liquefied gas from the liquefied gas storage device to the liquefied gas generator according to the supply request from the liquefied gas generator. An object of the present invention is to provide an automatic fire extinguishing system using liquefied gas that can re-liquefy the vaporized liquefied gas and thus improve energy efficiency, and a control method thereof.

This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, an automatic fire extinguishing system using liquefied gas according to any one of the various aspects of the present invention generates and stores liquefied gas, and according to the supply request of the liquefied gas a liquefied gas generator supplying the liquefied gas; Requesting the supply of the liquefied gas to the liquefied gas generator, storing the liquefied gas supplied from the liquefied gas generator, supplying the stored liquefied gas when a fire is detected, and supplying the liquefied gas from the liquefied gas generator a liquefied gas storage device for discharging vaporized liquefied gas to the liquefied gas generator according to a supply request; and a liquefied gas fire extinguishing device providing fire detection information to the liquefied gas storage device and injecting the liquefied gas supplied under the control of the liquefied gas storage device.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, the liquefied gas generator includes: a gas generator for generating supply gas; a first liquefied gas storage tank in which the supplied gas is supplied and the liquefied gas is stored; a refrigerator provided in the first liquefied gas storage tank and driven according to a refrigerator driving signal to liquefy the supplied gas; a compressor that circulates the refrigerant inside the refrigerator; a supply gas cylinder selectively supplying additional gas to the first liquefied gas storage tank; First state information including a first vaporized liquefied gas amount, a first supply gas amount, a first internal pressure, a first internal temperature, and a first liquefied gas amount for the first liquefied gas storage tank for the first liquefied gas storage tank a first state measurement means for measuring; And while selecting and controlling the supply of the supply gas or the additional gas so that the difference between the first supply gas amount and the first vaporized liquefied gas amount maintains a reference difference amount so that the first liquefied gas amount maintains a reference liquefied gas amount, the supplied gas or The refrigerator and the compressor are controlled to liquefy the additional gas, and the first vaporized liquefied gas amount maintains a reference vaporized liquefied gas amount, or the first internal pressure maintains a standard internal pressure, or the first internal temperature is determined as a standard. It may include; a first controller for controlling the refrigerator and the compressor to maintain the internal temperature and supplying the liquefied gas to the liquefied gas storage device.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the present invention, the liquefied gas generator is connected to the first controller, the first state information measured from the first liquefied gas storage tank, the first A first operation panel for displaying the supply gas amount and the first vaporized liquefied gas amount and inputting operation signals of the gas generator, the first liquefied gas storage tank, the refrigerator, the compressor, the supply gas cylinder, and the first state measuring means; further included. can do.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, the liquefied gas storage device includes: a second liquefied gas storage tank in which the liquefied gas supplied from the liquefied gas generator is stored; second state measuring means for measuring second state information including a second liquefied gas amount, a second vaporized liquefied gas amount, and a second internal pressure for the second liquefied gas storage tank; a vaporization gas tank supplying vaporized gas for supply pressure adjustment to the second liquefied gas storage tank; and requesting supply of the liquefied gas to the liquefied gas generator, and supplying the liquefied gas to the liquefied gas fire extinguishing device according to the fire detection information provided from the liquefied gas fire extinguishing device. A second controller for controlling a gas storage tank and discharging the second vaporized liquefied gas vaporized in the second liquefied gas storage tank to the liquefied gas generator at the request of the liquefied gas generator; there is.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, the liquefied gas storage device is connected to the second controller to display the second state information measured from the second liquefied gas storage tank, , a second operation panel for inputting operation signals of the second liquefied gas storage tank, the second state measuring means, and the vaporized gas tank; may further include.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, the liquefied gas fire extinguishing device measures the fire detection information including at least one of gas, smoke, temperature, and flame, and the liquefied gas storage device Fire detection means provided by; and a liquefied gas injector for injecting the liquefied gas supplied from the liquefied gas storage device.

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, the liquefied gas generator, the liquefied gas storage device, and the liquefied gas fire extinguishing device are connected to each other through a wired or wireless communication network and a control system for monitoring; further comprising can

In the automatic fire extinguishing system using liquefied gas according to one aspect of the invention, a plurality of liquefied gas storage devices are connected to one liquefied gas generator, and a plurality of liquefied gas fire extinguishing devices are connected to one liquefied gas storage device. And, the liquefied gas generator may be additionally provided with at least one reserve.

In the control method of an automatic fire extinguishing system using liquefied gas according to another aspect among the various aspects of the present invention, when a liquefied gas generator is operated, supply gas generated through a gas generator is converted into a first liquefied gas liquefying by supplying it to a storage tank; In response to a supply request of the liquefied gas from the liquefied gas storage device, the liquefied gas stored in the first liquefied gas storage tank is supplied to the liquefied gas storage device to supply the liquefied gas stored in the liquefied gas storage device to the second liquefied gas storage tank provided in the liquefied gas storage device. storing liquefied gas; Checking whether a fire occurs in the liquefied gas storage device according to fire detection information provided from a liquefied gas fire extinguishing device; supplying the liquefied gas from the second liquefied gas storage tank to the liquefied gas fire extinguishing device when the fire occurs; and injecting the liquefied gas supplied from the liquefied gas fire extinguishing device through a liquefied gas injector.

In the control method of an automatic fire extinguishing system using liquefied gas according to another aspect of the present invention, after supplying and liquefying the liquefied gas to the first liquefied gas storage tank, the first supply to the first liquefied gas storage tank measuring first state information including a gas amount, a first liquefied gas amount, a first internal temperature, a first vaporized liquefied gas amount, and a first internal pressure; and selectively controlling, by a first controller, supply of the supply gas or supply of additional gas using a supply gas cylinder so that a difference between the amount of the first supply gas and the amount of the first vaporized and liquefied gas maintains a reference difference amount. can do.

In the control method of an automatic fire extinguishing system using liquefied gas according to another aspect of the present invention, after the step of measuring the first state information, the first controller determines the first vaporized liquefied gas amount The refrigerator and the compressor are controlled so that the gas amount is maintained, the first internal pressure is maintained at the reference pressure, the first internal temperature is maintained at the reference internal temperature, or the first liquefied gas quantity is maintained at the reference liquefied gas quantity. It may further include;

In the control method of an automatic fire extinguishing system using liquefied gas according to another aspect of the present invention, after the step of storing the liquefied gas in the second liquefied gas storage tank, the second liquefied gas storage tank 2 requesting supply of liquefied gas to the liquefied gas generator when the amount of liquefied gas is less than the standard amount of liquefied gas; and receiving the liquefied gas from the liquefied gas generator and controlling the second liquefied gas amount to maintain the reference liquefied gas amount.

According to the present invention, while generating and storing liquefied gas in the liquefied gas generator, the liquefied gas is supplied to the liquefied gas storage device according to the supply request of the liquefied gas and stored, and when a fire is detected, the stored liquefied gas is extinguished Vaporized and liquefied while supplying liquefied gas necessary for fire extinguishing by supplying it to the device and spraying it to the fire area, and discharging the liquefied gas from the liquefied gas storage device to the liquefied gas generator according to the supply request from the liquefied gas generator. Gas can be re-liquefied, which can improve energy efficiency.

1 is a block diagram of an automatic fire extinguishing system using liquefied gas according to an embodiment of the present invention;
2 is a diagram illustrating a liquefied gas generator according to an embodiment of the present invention,
3 is a diagram illustrating a liquefied gas storage device according to an embodiment of the present invention;
4 is a diagram illustrating a liquefied gas fire extinguishing device according to an embodiment of the present invention;
5 is a flowchart showing a process of controlling an automatic fire extinguishing system using liquefied gas according to another embodiment of the present invention.

Hereinafter, an embodiment implementing an automatic fire extinguishing system using liquefied gas and a control method thereof according to the present invention will be described in detail with reference to the drawings.

However, the essential (intrinsic) technical idea of the present invention cannot be said to be limited by the embodiments described below, and based on the essential (intrinsic) technical idea of the present invention, a person skilled in the art below It is revealed that the embodiments described in include the range that can be easily proposed as a method of substitution or change.

In addition, since the terms used below are selected for convenience of description, in grasping the essential (intrinsic) technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted in a meaning consistent with the technical idea of the present invention. It should be.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an automatic fire extinguishing system using liquefied gas according to an embodiment of the present invention, FIG. 2 is a diagram illustrating a liquefied gas generator according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating the present invention. A diagram illustrating a liquefied gas storage device according to an embodiment of, and FIG. 4 is a diagram illustrating a liquefied gas fire extinguishing device according to an embodiment of the present invention.

1 to 4, an automatic fire extinguishing system using liquefied gas according to an embodiment of the present invention includes a liquefied gas generator 100, a liquefied gas storage device 200, a liquefied gas fire extinguishing device 300, wired and wireless It may include a communication network 400, a control system 500, and the like. Here, in the liquefied gas fire extinguishing system for energy saving, a plurality of liquefied gas storage devices 200 are connected to one liquefied gas generator 100 (for example, M, M is a positive integer), and liquefied gas storage A plurality of liquefied gas fire extinguishing devices 300 (eg, N, where N is a positive integer) may be connected to one device 200. Of course, the liquefied gas fire extinguishing device 300 is described as being provided with N, but depending on the place, it will be provided with various numbers such as N, O (O is a positive integer), P (P is a positive integer), etc. can In addition, the liquefied gas generator 100 may be connected to at least one spare group 100A additionally provided.

The liquefied gas generator 100 generates and stores liquefied gas and supplies the liquefied gas according to the supply request of the liquefied gas, the gas generator 110, the first liquefied gas storage tank 120, and the refrigerator 130 , a compressor 140, a supply gas cylinder 150, a first state measuring means 160, a first controller 170, a first operation panel 180, and the like.

The gas generator 110 generates supply gas, which may be supplied to the liquefied gas storage tank 120 to generate liquefied gas. Here, the supply gas may include, for example, nitrogen (N2), helium (He), argon (Ar), carbon dioxide (C02), and the like.

A first opening/closing valve 111 may be provided at the inlet of the gas generator 110 to open and close to supply or cut off supply gas under the control of the first controller 170 .

As described above, the gas generator 110 can produce gas to be liquefied using a pressure swing adsorption (PSA) method and supply the supply gas to the first liquefied gas storage tank 120 as needed.

When the gas generator 110 is an air compressor attachment type and is driven under the control of the first controller 170, the first supply gas amount and the first supply gas amount considering the amount of liquefaction of the supply gas under the control of the first controller 170 The supply gas may be supplied to the first liquefied gas storage tank 120 with minimal operation so that the difference between the amount of vaporized and liquefied gas (ie, the amount of the first exhaust gas) maintains the reference difference amount.

In addition, when the air compressor is attached and the control unit is separated from the first controller 170, the amount of liquefaction of the supplied gas according to the control of the control unit (including the inverter) operated in conjunction with the first controller 170 The supply gas may be supplied to the first liquefied gas storage tank 120 with minimal operation so that the difference between the considered first supply gas amount and the first vaporized liquefied gas amount maintains the reference difference amount.

On the other hand, when the gas generator 110 supplies air from the outside, a flow meter (MFM) and a flow control valve may be installed on the inlet line through which the outside air is introduced, and the supply according to the control of the first controller 170 The flow control valve is controlled so that the difference between the first supply gas amount considering the amount of gas liquefied and the first vaporized liquefied gas amount (i.e., the first exhaust gas amount) maintains the standard difference amount. Supply gas may be supplied to the first liquefied gas storage tank 120 by generating supply gas from the gas generator 110 .

The first liquefied gas storage tank 120 is a tank in which supply gas is supplied from the gas generator 110 and liquefied liquefied gas is stored, and a first supply line 121 through which liquefied gas is supplied to the liquefied gas storage device 200 ), a discharge line 122 through which vaporized liquefied gas is discharged, a supply recovery line 123 through which supply gas is supplied, additional gas is supplied, or vaporized liquefied gas is recovered from the liquefied gas storage device 200. It can be.

The first supply line 121 may be provided with a first non-return valve 124 for preventing the back flow of the liquefied gas when the liquefied gas is supplied, and the rear end of the first non-return valve 124 (i.e., storage of liquefied gas) A second on-off valve (125, low-temperature solenoid valve) provided on the first supply line 121 in the direction of the device 200 and opening and closing the first supply line 121 under the control of the first controller 170 may be provided.

The discharge line 122 may be provided with a first flowmeter 126 for measuring the amount of vaporized and liquefied gas discharged, and the discharge line 122 at the rear end of the first flowmeter 126 (ie, in the direction in which the vaporized and liquefied gas is discharged). ) and may be provided with a third opening/closing valve 127 for opening and closing the discharge line 122 under the control of the first controller 170.

In the supply recovery line 123, supply gas is supplied from the supply gas cylinder 110 to the first liquefied gas storage tank 120, or additional gas is supplied from the gas generator 150 to the first liquefied gas storage tank 120. Is supplied, or the vaporized liquefied gas from the liquefied gas storage device 200 may be recovered to the first liquefied gas storage tank 120, the supply recovery line 123, the supply gas, additional gas or vaporized liquefied gas selectively In order to supply, a fourth on-off valve (129, proportional control valve) for opening and closing the supply recovery line 123 under the control of the first controller 170 may be provided, and the rear end of the fourth on-off valve 129 (that is, , in the direction of the first liquefied gas storage tank 120) may be provided with a second flow meter 128 for measuring the flow rate of the supplied gas, the additional gas, or the vaporized liquefied gas.

The first flow meter 126 and the second flow meter 128 as described above may each include a mass flow meter (MFM) or the like.

On the other hand, in the first liquefied gas storage tank 120 as described above, a first state measuring means for measuring the first liquefied gas amount, the first internal temperature, and the first internal pressure of the first liquefied gas storage tank 120 ( 160) may be provided. As the first state measuring means 160, a first temperature sensor 161, a first pressure sensor 162, a first liquefied gas level sensor 163 or a load cell (not shown) , a second pressure sensor 164, etc., and additionally using the first flowmeter 125, the second flowmeter 128, etc. provided in the first liquefied gas storage tank 120 to obtain the first state information can measure

In addition, in the first liquefied gas storage tank 120, a refrigerator 130 for maintaining the first internal temperature of the first liquefied gas storage tank 120 at a reference internal temperature (ie, a temperature capable of liquefaction) is provided to the storage tank body, It may be provided in a flange or the like, and may be provided in an open type or a closed type.

As described above, the flange of the first liquefied gas storage tank 120 may be further provided with an insulating material for blocking external heat input.

The refrigerator 130 is provided in the first liquefied gas storage tank 120 and is driven according to a refrigerator driving signal provided from the first controller 170 to liquefy the supplied gas, and the first liquefied gas storage tank 120 1 The internal temperature is adjusted to maintain the reference internal temperature, and may be installed on the storage tank body, flange, etc. of the first liquefied gas storage tank 120.

Here, the refrigerator 130 may be any one selected from a G-M refrigerator, a Solvay refrigerator, a pulse refrigerator, and a Stelling refrigerator, and the cooling surface may be installed to be located inside the first liquefied gas storage tank 120 .

In addition, cooling fins or cooling plates may be installed in the heat station to efficiently maintain the internal temperature of the first liquefied gas storage tank 120 and generate liquefied gas. It can be installed to expand the cooling area in order to efficiently transfer it to the inside of the gas storage tank 120, and accordingly, while the inside of the first liquefied gas storage tank 120 is cooled, the temperature of the gas decreases, and the liquefiable It can be liquefied when it reaches a temperature (eg, in the case of nitrogen (N2), a temperature of approximately 77 K, which is the liquefaction temperature of nitrogen).

In such a refrigerator 130, when the first internal temperature deviates from the reference internal temperature, the refrigerator is accelerated to reach the reference internal temperature (for example, a temperature of 77 K or less) according to the refrigerator driving signal provided from the first controller 170. Alternatively, chiller deceleration may be performed.

And, in the refrigerator 130, when the measured internal pressure deviates from the reference internal pressure, the reference internal pressure 0-set value (eg, 0-0.1 MPa, etc. ), you can perform freezer acceleration or freezer deceleration to

In addition, in the refrigerator 130, when the measured amount of vaporized and liquefied gas deviates from the standard amount of vaporized and liquefied gas, the reference amount of vaporized and liquefied gas is 0-set value (for example, 0- 0.1 sccm) can be performed with either a chiller acceleration or a chiller deceleration.

The refrigerator 130 as described above may be installed (or detachably provided) in the first liquefied gas storage tank 120, and its cooling surface may be installed inside the first liquefied gas storage tank 120. and other parts can be installed outside based on the flange.

The compressor 140 circulates a refrigerant inside the refrigerator 130, and for example, a refrigerant including helium (He) may be used. Since the compressor 140 has been variously disclosed in the prior art, a detailed description thereof will be omitted.

The supply gas cylinder 150 is a container (cylinder, cylinder) in which supply gas is stored, and selectively supplies additional gas to the first liquefied gas storage tank 120 under the control of the first controller 170, but the gas generator ( When the supply of supplied gas is not smooth or impossible due to a failure of 110) or when the gas generator 110 cannot be used, additional gas is supplied to the liquefied gas generator 100 to generate liquefied gas. can cause

In addition, the supply gas cylinder 150 transfers the liquefied gas stored in the first liquefied gas storage tank 120 to the supply line 121 when a supply of liquefied gas is requested from the liquefied gas storage device 200 to the liquefied gas generator 100. ) It is possible to supply the additional gas for adjusting the supply pressure to be supplied to the liquefied gas storage device 200 to the first liquefied gas storage tank 120 through.

Here, the supply gas may include, for example, nitrogen (N2), helium (He), argon (Ar), carbon dioxide (CO2), and the like.

A fifth on/off valve 151 may be provided at the inlet end of the supply gas cylinder 150 to open and close to supply or cut off the supply of additional gas under the control of the first controller 170 .

The first state measuring means 160 measures state information including the first liquefied gas amount, the first internal temperature, and the first internal pressure for the first liquefied gas storage tank 120, and the first temperature sensor 161 ), a first pressure sensor 162, a first liquefied gas level sensor 163, a second pressure sensor 164, and the like.

Here, the first temperature sensor 161 may be provided in the first liquefied gas storage tank 120 to measure the first internal temperature and provide the measured first internal temperature to the first controller 170, The first pressure sensor 162 includes a pressure gauge to measure the first internal pressure of the first liquefied gas storage tank 120, and converts the measured first internal pressure (ie, internal pressure value) to the first controller ( 170), the first liquefied gas level sensor 163 is provided in the first liquefied gas storage tank 120 to measure the stored first liquefied gas amount, and the measured first liquefied gas amount to the first controller ( 170) can be provided.

A first safety valve (165, safety valve) may be provided on the line where the first pressure sensor 162 is provided as described above, on the flange of the first liquefied gas storage tank 120, or on another line leading to the inside, Through this, when the first internal pressure of the first liquefied gas storage tank 120 exceeds a preset reference internal pressure value, it is forcibly opened to reduce the first internal pressure.

And, the second pressure sensor 164 may be installed to measure that the internal pressure of the first liquefied gas storage tank 120 becomes a vacuum (ie, (-) pressure), and to prevent becoming a vacuum It can be used as an interlock control signal.

The first liquefied gas level sensor 163 of the first state measuring means 160 as described above is a means for measuring the first liquefied gas amount of the first liquefied gas storage tank 120, and the weight of the first liquefied gas amount A configuration such as a load cell for measuring may be applied.

The first controller 170 controls the supply of gas supplied by the gas generator 110, controls the operation of the refrigerator 130, controls the supply of additional gas to the supplied gas cylinder 150, and controls the supply of the first state measuring means 160. By performing measurement control and controlling the first internal pressure to maintain the reference internal pressure, the supply of the supply gas or the supply of the additional gas is performed so that the difference between the first supply gas amount and the first vaporized and liquefied gas amount maintains the reference difference amount. Selectively control, so that the first internal pressure maintains the standard internal pressure, or the first vaporized liquefied gas amount maintains the standard vaporized liquefied gas amount, or the first internal temperature maintains the standard internal temperature, or the first liquefied gas amount The refrigerator and the compressor may be controlled to maintain a standard amount of liquefied gas, and the liquefied gas may be supplied to the liquefied gas storage device 200 .

The first controller 170 as described above may be configured in the form of a box, have a structure that is isolated from the mechanical unit (ie, other components), or may be configured separately, PLC, embedded, PC can be built on a basis.

In the first controller 170, an inverter for a refrigerator, an inverter for a compressor, an inverter for a gas generator, etc. may be installed, respectively, and an input module for processing signals (IO, analog, communication method, etc.) input from various measurement sensors and , Gas generator 110, first liquefied gas storage tank 120, refrigerator 130, compressor 140, supply gas cylinder 150, various sensors and valves including the first state measuring means 160, etc. It will be composed of an output module that processes control signals (IO, analog (voltage, current method), communication method, etc.), and a first operation panel 180 for operation such as checking operating status and inputting conditions in conjunction with this. can

As described above, the first controller 170 controls the opening of the gas generator 110 and the first opening/closing valve 111 to liquefy the gas, generates the supply gas, and supplies the first liquefied gas through the supply recovery line 123. The supply gas supplied to the first liquefied gas storage tank 120 may be liquefied by controlling supply to the storage tank 120 and controlling the operation of the refrigerator 130 and the compressor 140 to generate liquefied gas. there is.

Thereafter, the first controller 170 provides a control signal to the first state measuring means 160 to measure the first liquefied gas amount, the first internal temperature, and the first internal pressure of the first liquefied gas storage tank 120. And, a control signal may be provided to the first flow meter 125 and the second flow meter 128 to measure the first supply gas amount and the first vaporized liquefied gas amount.

On the other hand, when the amount of the first liquefied gas stored in the first liquefied gas storage tank 120 of the liquefied gas generator 100 exceeds the standard liquefied gas amount and the liquefied gas generator 100 is in a stopped state, the first controller In (170), the first internal temperature is compared with the standard internal temperature, the first internal pressure is compared with the standard internal pressure, or the first vaporized liquefied gas amount is compared with the standard vaporized liquefied gas amount. A refrigerator driving signal and a compressor driving signal for reducing the vaporization amount of the liquefied gas stored in the liquefied gas storage tank 120 may be provided.

For example, in the first controller 170, the first vaporized liquefied gas amount measured through the first flow meter 126 installed on the discharge line 122 of the first liquefied gas storage tank 120 determines the standard vaporized liquefied gas amount. If it is out of the standard vaporized liquefied gas amount, and as a result of the check, a refrigerator driving signal (for example, refrigerator acceleration control) is sent to the refrigerator 130 to maintain the first liquefied gas storage tank 120 at the standard vaporized liquefied gas amount , chiller deceleration control, circulating refrigerant amount control, etc.) can be provided. Here, the standard vaporized liquefied gas amount may be set to a flow rate of 0-set value (eg, 0-0.1 sccm), and the driving of the refrigerator 130 may be controlled to have a flow rate of 0 sccm.

Then, the first controller 170 checks whether the first internal pressure measured by the first pressure sensor 162 of the first state measuring means 160 is out of the standard internal pressure, and as a result of the check, the standard internal pressure When it is out of the range, a refrigerator drive signal (eg, refrigerator acceleration control, refrigerator deceleration control, circulating refrigerant amount adjustment, etc.) may be provided to the refrigerator 130 in order to maintain the first liquefied gas storage tank 120 at the reference internal pressure. there is. Here, the reference internal pressure may be set to a pressure of 0-set value (eg, 0-0.1 MPa, etc.), and driving of the refrigerator 130 may be controlled so as to have a pressure of 0 MPa.

In addition, in the first controller 170, when the first internal temperature measured by the first temperature sensor 161 of the first state measuring means 160 is out of the reference internal temperature, the first liquefied gas storage tank 120 is removed. In order to maintain the reference internal temperature, a refrigerator drive signal (eg, refrigerator acceleration control, refrigerator deceleration control, circulating refrigerant amount control, etc.) may be provided to the refrigerator 130 . Here, the reference internal temperature may be set to, for example, 77-105 K, and the operation of the refrigerator 130 may be controlled so that the temperature of 77-105 K may be maintained.

As described above, the first controller 170 can control the first internal temperature of the first liquefied gas storage tank 120 to maintain the reference internal temperature, and the first internal temperature of the first liquefied gas storage tank 120 The pressure can be controlled to maintain the reference internal pressure, and the first vaporized liquefied gas amount of the first liquefied gas storage tank 120 can be controlled to maintain the reference vaporized liquefied gas amount.

In addition, in the first controller 170, the difference between the amount of the first supply gas supplied to the first liquefied gas storage tank 120 and the amount of the first vaporized liquefied gas discharged from the first liquefied gas storage tank 120 determines the reference difference amount. For this purpose, supply of supply gas using the gas generator 110 or supply of additional gas using the supply gas cylinder 150 may be selectively controlled.

Meanwhile, the first controller 170 supplies liquefied gas to the first supply line 121 when a liquefied gas supply request signal is transmitted from the second controller 240 provided in the liquefied gas storage device 200. In order to control the first liquefied gas storage tank 120, the first internal pressure of the first liquefied gas storage tank 120 is increased by the supply gas pressure of the gas generator 110 or the supply gas cylinder 150, and the supply return line The first on-off valve 111 and the fourth on-off valve 129 or the first on-off valve 111 and the fifth on-off valve 151 provided on the 123 are opened, and the third on-off valve 127 is opened. By controlling to close, and controlling the first on-off valve 124 provided on the first supply line 121 to open, liquefied gas is provided in the liquefied gas storage device 200 through the first supply line 121. It can be supplied to the second liquefied gas storage tank 210.

In addition, in the first controller 170, when vaporized liquefied gas required for gas liquefaction is required in the first liquefied gas storage tank 120, the second controller 240 provided in the liquefied gas storage device 200 controls the amount of vaporized liquefied gas. By requesting supply and controlling the fourth opening/closing valve 128 provided in the supply recovery line 123 to open, the second vaporized liquefied gas discharged from the second liquefied gas storage tank 210 is recovered and the first liquefied gas is discharged. It can be supplied to the gas storage tank 120.

The first operation panel 180 is connected to the first controller 170 and displays the first state information measured from the first liquefied gas storage tank 120, the first supply gas amount, and the first vaporized liquefied gas amount, and the gas generator 110, the first liquefied gas storage tank 120, the refrigerator 130, the compressor 140, the supply gas cylinder 150, and a means for inputting operation signals of the first state measuring means 160, for example For example, it includes a touch screen panel, etc., and can display various status information as well as provide various operation buttons and information for operation control.

The liquefied gas generator 100 as described above may be provided with a power supply for supplying power, and through this power supply, the gas generator 110, the first liquefied gas storage tank 120, and the refrigerator 130, compressor 140, supply gas cylinder 150, first state measuring means 160, first controller 170, first operation panel 180, including power to components that require power can supply

The liquefied gas storage device 200 requests the supply of liquefied gas to the liquefied gas generator 100, stores the liquefied gas supplied from the liquefied gas generator 100, and supplies the stored liquefied gas when a fire is detected. And, according to the supply request from the liquefied gas generator 100, the vaporized liquefied gas is discharged to the liquefied gas generator 100, the second liquefied gas storage tank 210, the second state measuring means 220, It may include a vaporization gas tank 230, a second controller 240, a second operation panel 250, and the like. A plurality of such liquefied gas storage devices 200 may be connected to one liquefied gas generator 100 and provided.

The second liquefied gas storage tank 210 stores liquefied gas supplied from the liquefied gas generator 100, and the first supply line of the liquefied gas generator 100 under the control of the second controller 240 ( 121) can store the liquefied gas supplied from the first liquefied gas storage tank 120. Here, on the first supply line 121 of the first liquefied gas storage tank 120, a sixth on-off valve (211, low-temperature solenoid valve) and a second check valve (212, check valve) may be provided, These may open or close the first supply line 121 under the control of the second controller 240 .

In addition, the second liquefied gas storage tank 210 may supply liquefied gas to the liquefied gas fire extinguishing device 300 through the second supply line 213 under the control of the second controller 240, the second supply line A seventh opening/closing valve (214, low-temperature solenoid valve) may be provided on 213, which may open or close the second supply line 213 under the control of the second controller 240.

On the other hand, the second liquefied gas storage tank 210 discharges the second vaporized liquefied gas through the supply recovery line 123 under the control of the second controller 240 to supply the first liquefied gas of the liquefied gas generator 100. An eighth opening/closing valve (215, normal temperature electronic valve) may be provided to supply the storage tank 120, and on this line, if the second liquefied gas is not supplied to the liquefied gas generator 100, the second evaporation In order to discharge liquefied gas to the outside, a ninth on/off valve 216 (normal temperature solenoid valve or low temperature solenoid valve) opened under the control of the second controller 240 may be provided.

In addition, a third flowmeter 217 for measuring the amount of the second vaporized liquefied gas may be provided at the rear end of the eighth open/close valve 215 (ie, in the direction of the liquefied gas generator 100).

The second state measuring means 220 measures the second state information including the second liquefied gas amount, the second vaporized liquefied gas amount, and the second internal pressure for the second liquefied gas storage tank, and the third pressure sensor 221 ), a second liquefied gas level sensor 222, a second safety valve 223, a rupture plate 224, and the like.

Here, the third pressure sensor 221 measures the second internal pressure of the second liquefied gas storage tank 210 by including a pressure gauge and the like, and provides the measured second internal pressure (ie, internal pressure value). 2 may be provided by the controller 240, and the second liquefied gas level sensor 222 is provided in the second liquefied gas storage tank 210 to measure the amount of the stored second liquefied gas, and measures the measured amount of the second liquefied gas. 2 can be provided by the controller 240.

Here, the second liquefied gas level sensor 222 may be provided with, for example, an electrostatic flow meter or an IO type sensor that detects upper and lower limits. Here, the second liquefied gas level sensor 222 is a means for measuring the amount of the second liquefied gas in the second liquefied gas storage tank 210, such as a load cell (not shown) for measuring the weight of the second liquefied gas amount. The same configuration can also be applied.

As described above, the second safety valve 223 may be provided on the line where the third pressure sensor 221 is provided, on the flange of the second liquefied gas storage tank 210, or on another line leading to the inside. 2 When the second internal pressure of the liquefied gas storage tank 210 exceeds the preset reference internal pressure value, it is forcibly opened to reduce the second internal pressure.

In addition, the rupture plate 224 may be provided on the line where the third pressure sensor 221 is provided, on the flange of the second liquefied gas storage tank 210, or on another line leading to the inside, which is When the safety valve 223 does not operate, the second internal pressure of the second liquefied gas storage tank 210 continuously rises and exceeds the standard burst pressure. 2 Vaporized and liquefied gas can be discharged.

In addition, the liquefied gas storage device 200 is in an operation standby state, such as when the amount of the second liquefied gas in the second liquefied gas storage tank 210 exceeds the standard liquefied gas amount, or the power of the liquefied gas storage device 200 is turned off ( In the OFF) state, the ninth on-off valve 216 is normally open (OPEN), so that the second internal pressure of the second liquefied gas storage tank 210 can be controlled to be maintained at atmospheric pressure.

The vaporized gas tank 230 supplies the vaporized gas for supply pressure adjustment to the second liquefied gas storage tank 210, and the vaporized gas for supply pressure adjustment filled therein according to the control of the second controller 240 is supplied to the second liquefied gas. It can be supplied to the gas storage tank 210, and at this time, on the third supply line 231 connecting the vaporized gas tank 230 and the second liquefied gas storage tank 210, the 10th on-off valve 232, normal temperature solenoid valve ) Is provided and can be opened under the control of the second controller 240 to supply the vaporized gas for adjusting the supply pressure to the second liquefied gas storage tank 210.

Here, the vaporization gas tank 230 may be provided with a fourth pressure sensor 233 for measuring the third internal pressure of the vaporization gas tank 230 .

The second controller 240 requests the supply of liquefied gas to the liquefied gas generator 100, and supplies the liquefied gas to the liquefied gas fire extinguishing device 300 according to the fire detection information provided from the liquefied gas fire extinguishing device 300. To control the vaporized gas tank 230 and the second liquefied gas storage tank 210, and the second vaporized liquefied gas vaporized in the second liquefied gas storage tank 210 according to the request of the liquefied gas generator 100 It can be controlled to be discharged to the liquefied gas generator 100.

After the second controller 240 compares the second liquefied gas amount of the second liquefied gas storage tank 210 with the reference liquefied gas amount through the second liquefied gas level sensor 222 of the second state measuring means 220 , When the standard liquefied gas amount is less than the first controller 170 of the liquefied gas generator 100 may transmit a liquefied gas supply request signal requesting the supply of liquefied gas.

For example, the second controller 240 determines whether the second liquefied gas amount is less than the standard liquefied gas amount through the second liquefied gas level sensor 222 of the second state measuring means 220, or both the maximum and minimum level signals. If it is off, or if the measured weight value of a load cell (not shown) for measuring weight is less than the reference weight value, check whether the second internal pressure measured through the third pressure sensor 221 is 0 or atmospheric pressure , As a result of the check, the second internal pressure is 0 (or close to 0, or within a set value such as 0-0.1 MPa), or in the case of atmospheric pressure, liquefied by the first controller 170 of the liquefied gas generator 100 Gas supply can be requested.

At this time, the second controller 240 may control the opening of the sixth opening/closing valve 211 and may control the opening of the ninth opening/closing valve 216 .

On the other hand, the second controller 240, through the second liquefied gas level sensor 222 of the second state measuring means 220, when the second liquefied gas amount exceeds the standard liquefied gas amount, or both the maximum and minimum level signals are turned on (on), or when the measured weight value of a load cell (not shown) for measuring weight exceeds the reference weight value, a supply stop request signal is transmitted to the first controller 170 of the liquefied gas generator 100 By doing so, it is possible to stop filling the liquefied gas into the second liquefied gas storage tank 210 . At this time, the second controller 240 may control the sixth opening/closing valve 211 to be closed.

In addition, the second controller 240 receives fire detection information including at least one of gas, smoke, temperature and flame from the fire detection means 310 through the detection controller 330 of the liquefied gas fire extinguishing device 300. However, when it is determined that any one of gas generation, smoke generation, exceeding the reference temperature, and flame generation is determined according to the fire detection information (that is, it is determined that a fire occurs), the vaporized gas for adjusting the supply pressure to the vaporized gas tank 230 The second liquefied gas storage tank 210 is controlled to supply, and the second liquefied gas storage tank 210 is controlled to supply the liquefied gas to the second supply line 213 while the seventh on-off valve 214 and The liquefied gas in the second liquefied gas storage tank 210 is discharged through the injection nozzle 322 provided in the liquefied gas injector 320 of the liquefied gas fire extinguishing device 300 by opening the eleventh on-off valve 321 (low-temperature solenoid valve). It can be controlled through the detection controller 330 to spray through.

Here, the second controller 240 closes the eighth on-off valve 215 provided on the supply recovery line 123 in a closed state and closes the ninth on-off valve 216 discharging the second vaporized liquefied gas. Control to supply the liquefied gas to the liquefied gas fire extinguishing device 300 by increasing the second internal pressure of the second liquefied gas storage tank 210 due to the supply of the vaporized gas for filling the supply pressure of the vaporized gas tank 230 can do.

In addition, the second controller 240 even after supplying for a predetermined supply time (eg, 1 minute, 3 minutes, etc.), gas, smoke, temperature from the fire detection means 310 of the liquefied gas fire extinguishing device 300 And when it is determined that the fire continues according to the fire detection information including at least one of the flame, it can be controlled to additionally supply liquefied gas for a predetermined additional time (eg, 1 minute, 3 minutes, etc.).

The process as described above may control each component and valve to return to the original state when it is determined that the fire has stopped according to the fire detection information.

On the other hand, the second controller 240 controls the opening of the eighth on-off valve 215 provided in the supply recovery line 123 when the supply of vaporized liquefied gas is requested from the first controller 170, while the ninth on-off valve (216) can be controlled to close, so that the second vaporized liquefied gas discharged from the second liquefied gas storage tank 210 is supplied to the first liquefied gas storage tank 120 through the supply recovery line 123. .

The second controller 240 as described above may be provided with an uninterruptible response function for stable fire control, and when a power failure occurs, the second controller 240 operates for a predetermined time (eg, 30 minutes, 40 minutes, etc.) ) while maintaining power.

The second operation panel 250 is connected to the second controller 240 and displays the second state information measured from the second liquefied gas storage tank 210, and the second liquefied gas storage tank 210, the second state Means for inputting operation signals of the measuring means 220 and the vaporized gas tank 230 include, for example, a touch screen panel, etc., and can display various status information as well as various operation buttons for controlling operation. and information can be provided.

The liquefied gas fire extinguishing device 300 provides fire detection information to the liquefied gas storage device 200 and injects the liquefied gas supplied under the control of the liquefied gas storage device 200, the fire detection means 310, It may include a liquefied gas injector 320, a detection controller 330, and the like. A plurality of such liquefied gas fire extinguishing devices 300 may be connected to one liquefied gas storage device 200 and provided.

The fire detection means 310 measures fire detection information including at least one of gas, smoke, temperature and flame and provides it to the liquefied gas storage device 200, a gas smoke detector 311, a second temperature sensor ( 312), a flame detector 313, and the like.

Here, the gas smoke detector 311 detects gas such as carbon monoxide in the space where the liquefied gas fire extinguishing device 300 is installed, or detects smoke through a photoelectric detection method, and measures the result. Fire detection information may be provided to the second controller 240 .

In addition, the second temperature sensor 312 detects the temperature of the space in which the liquefied gas fire extinguishing device 300 is installed and when it reaches the reference temperature, a constant temperature method that provides it as fire detection information, and a rapid The fire detection information may be provided to the second controller 240 in a differential method in which temperature change is measured and provided as fire detection information.

In addition, the flame detector 313 detects optical characteristics such as ultraviolet (UV) wavelengths, infrared (IR) wavelengths, and flickering in which flames are generated in the space where the liquefied gas fire extinguishing device 300 is installed to fire them Sensing information may be provided to the second controller 240 .

The liquefied gas injector 320 injects the liquefied gas supplied from the liquefied gas storage unit 200, and may include an eleventh open/close valve 321 and a spray nozzle 322.

Here, the eleventh on-off valve 321 may be opened under the control of the second controller 240 to supply the liquefied gas supplied from the second liquefied gas storage tank 210 to the injection nozzle 322.

And, the injection nozzle 322 can extinguish the fire by injecting the liquefied gas supplied through the second supply line 213 to the space where the liquefied gas fire extinguishing device 300 is installed.

On the other hand, the detection controller 330 may transmit fire detection information of the fire detection means 310 to the second controller 240 in conjunction with the second controller 240 through a communication method, an IO method, or a communication method, Control of detection functions such as the gas smoke detector 311, the second temperature sensor 312, and the flame detector 313 provided in the liquefied gas fire extinguishing device 300 according to the control signal from the second controller 240, the eleventh Valve opening/closing control, such as the opening/closing valve 321, may be performed, and the output signal may be output in a single IO method, a plurality of IO methods, a communication method, or a numerical value.

In addition, the detection controller 330 may open and control the eleventh on-off valve 321 to supply liquefied gas after the output signal is output.

This detection controller 330 can be installed on the upper part of the cabinet of the liquefied gas fire extinguishing device 300, and is provided as a dedicated controller or an intermediate controller or interlocking sensor or sensor having each function is connected to one intermediate controller. It may be provided with a structure that does. The sensing controller 330 may be a product of an integral structure capable of sensing gas, smoke, temperature, flame, and the like.

The wired and wireless communication network 400 is connected to the liquefied gas generator 100, the liquefied gas storage device 200, the liquefied gas fire extinguishing device 300, and the control system 500, respectively, and is responsible for mutual communication, for example Wired communication such as RS232 and, for example, RF, zigbee, Bluetooth, wi-fi, wibro, NFC (near field communication), BLE (bluetooth low energy), etc. It may include not only currently implemented communication methods such as wireless communication, but also communication methods to be implemented in the future.

The control system 500 is connected to the liquefied gas generator 100, the liquefied gas storage device 200, and the liquefied gas fire extinguishing device 300 through a wired or wireless communication network 400 to monitor various information, and the liquefied gas is generated. Device 100 and each component, liquefied storage device 200 and each component, and liquefied gas fire extinguishing device 300 and each component by assigning an address or IP to monitor operation status, operation history, etc. and store and manage that data.

Therefore, according to one embodiment of the present invention, while generating and storing liquefied gas in the liquefied gas generator, liquefied gas is supplied to and stored in the liquefied gas storage device according to the request for supply of liquefied gas, and when a fire is detected, liquefied gas Vaporized gas is supplied to the liquefied gas storage tank of the gas storage device, and the stored liquefied gas is supplied to the liquefied gas fire extinguishing device to be sprayed to the area where the fire occurs. By discharging to the liquefied gas generator, it is possible to re-liquefy the vaporized liquefied gas while supplying the liquefied gas necessary for fire extinguishing, thereby improving energy efficiency.

Next, in the automatic fire extinguishing system using liquefied gas having the configuration described above, the liquefied gas generator generates and supplies liquefied gas, and after storing it in the liquefied gas storage device, the fire detection provided from the liquefied gas fire extinguishing device A process of controlling the spraying of liquefied gas to the fire area in the event of a fire according to the information will be described.

5 is a flowchart showing a process of controlling an automatic fire extinguishing system using liquefied gas according to another embodiment of the present invention.

Referring to FIG. 5 , when the liquefied gas generator 100 is operated, the supply gas generated through the gas generator 110 may be supplied to the first liquefied gas storage tank 120 to be liquefied (step 511).

Here, the first controller 170 of the liquefied gas generator 100 controls the opening of the gas generator 110 and the first on/off valve 111 to liquefy the gas, thereby supplying the supplied gas to the supply recovery line 123. The supply gas supplied to the first liquefied gas storage tank 120 is liquefied by controlling the operation of the refrigerator 130 and the compressor 140 to generate liquefied gas. can be controlled to do so.

Next, the first state information including the first supply gas amount, the first liquefied gas amount, the first internal temperature, the first vaporized liquefied gas amount, and the first internal pressure for the first liquefied gas storage tank 120 can be measured. Yes (step 512).

Here, the first controller 170 measures the first supply gas amount, the first liquefied gas amount, the first internal temperature, the first vaporized liquefied gas amount, and the first internal pressure of the first liquefied gas storage tank 120. A control signal is provided to the state measuring means 160, the first flow meter 126, and the second flow meter 128, and in the first condition measuring means 160, the first temperature sensor 161 and the first pressure sensor 162 ) and the first liquefied gas level sensor 163 to measure the first internal temperature, the first internal pressure, and the first liquefied gas amount, and the first flowmeter 126 to measure the first vaporized liquefied gas amount. And, the first supply gas amount can be measured through the second flow meter 128.

And, in the first controller 170, the first vaporized and liquefied gas measured through the first flow meter 126 provided in the discharge line 122 to measure the first vaporized and liquefied gas amount is the standard vaporized and liquefied gas amount (for example, , 0-0.1 sccm, etc.), or the first internal pressure maintains the reference internal pressure, or the first internal temperature maintains the reference internal temperature. The refrigerator 130 and the compressor 140 may be controlled. (Step 513).

In addition, in the first controller 170, when the first liquefied gas amount measured by the first state measuring means 160 is less than the reference liquefied gas amount, the supply gas generated through the gas generator 110 is stored in the first liquefied gas storage tank. 120, and by controlling the refrigerator 130 and the compressor 140 to generate liquefied gas, it can be controlled to maintain the standard liquefied gas amount, and supply of supplied gas due to a failure of the gas generator 110, etc. If this is not smooth, the supply gas cylinder 150 may be controlled to supply additional gas to the first liquefied gas storage tank 120 (step 514).

Here, the first controller 170 can control the first open/close valve 111 and the fourth open/close valve 129 to be opened to supply the supply gas of the gas generator 110, and the gas supply cylinder 150 When additional gas is supplied from the fourth on-off valve 129 and the fifth on-off valve 151 can be controlled to open.

In the first controller 170 as described above, the difference between the amount of the first supply gas supplied to the first liquefied gas storage tank 120 and the amount of the first vaporized liquefied gas discharged from the first liquefied gas storage tank 120 is the standard difference It can be controlled to maintain the amount, and for this purpose, the supply of supply gas using the gas generator 110 or the supply of additional gas using the supply gas cylinder 150 can be selectively controlled.

Next, in the second controller 240 of the liquefied gas storage device 200, when the second liquefied gas amount of the second liquefied gas storage tank 210 is less than the reference liquefied gas amount, the first controller of the liquefied gas generator 200 ( 170) to request the supply of liquefied gas (step 515).

Here, the second controller 240 compares the second liquefied gas amount of the second liquefied gas storage tank 210 with the reference liquefied gas amount through the second liquefied gas level sensor 222 of the second state measuring means 220. After that, if the standard liquefied gas amount is less than the first controller 170 of the liquefied gas generator 100 may transmit a liquefied gas supply request signal requesting the supply of liquefied gas.

For example, the second controller 240 determines whether the second liquefied gas amount is less than the standard liquefied gas amount through the second liquefied gas level sensor 222 of the second state measuring means 220, or both the maximum and minimum level signals. If it is off, or if the measured weight value measured through the load cell for weight measurement is less than the reference weight value, it is checked whether the second internal pressure measured through the third pressure sensor 221 is 0 or atmospheric pressure, and As a result of the check, the liquefied gas is supplied to the first controller 170 of the liquefied gas generator 100 when the second internal pressure is 0 (or close to 0, or within a set value such as 0-0.1 MPa), or atmospheric pressure. can request

And, in the first controller 170 of the liquefied gas generator 100, when the supply of liquefied gas is requested from the second controller 240 of the liquefied gas storage device 200, the first liquefied gas storage tank 120 In order to supply the stored liquefied gas to the liquefied gas storage device 200, the first internal pressure of the first liquefied gas storage tank 120 is increased by using the supply gas pressure of the gas generator 110 or the supply gas cylinder 150. and supplying the liquefied gas to the liquefied gas storage device 200 to store the liquefied gas in the second liquefied gas storage tank 210 provided in the liquefied gas storage device 200 (step 516).

For example, the first controller 170 supplies liquefied gas to the first supply line 121 when a liquefied gas supply request signal is transmitted from the second controller 240 provided in the liquefied gas storage device 200. In order to control the first liquefied gas storage tank 120, the first internal pressure of the first liquefied gas storage tank 120 is increased by the supply gas pressure of the gas generator 110 or the supply gas cylinder 150, and supply The first on-off valve 111 and the fourth on-off valve 129 or the first on-off valve 111 and the fifth on-off valve 151 provided on the recovery line 123 are opened, and the third on-off valve 127 ), and by controlling the first on-off valve 124 provided on the first supply line 121 to be opened, the liquefied gas is supplied through the first supply line 121 to the liquefied gas storage device 200 It can be supplied to the second liquefied gas storage tank 210 provided in the.

At this time, the second controller 240 may control the opening of the sixth opening/closing valve 211 and may control the opening of the ninth opening/closing valve 216 .

After that, in the second controller 240, when the second liquefied gas amount measured through the second liquefied gas level sensor 222 of the second state measuring means 220 exceeds the standard liquefied gas amount, or the level signal is maximum and When at least all are on, or when the measured weight value measured through the load cell exceeds the reference weight value, by transmitting a supply stop request signal to the first controller 170 of the liquefied gas generator 100, 2 The filling of the liquefied gas into the liquefied gas storage tank 210 may be stopped. At this time, the second controller 240 may control the sixth opening/closing valve 211 to be closed.

Next, the second controller 240 of the liquefied gas storage device 200 may check whether or not a fire occurs according to the fire detection information provided from the detection controller 330 of the liquefied gas fire extinguishing device 300 (step 517). ).

Here, the second controller 240 provides fire detection information including at least one of gas, smoke, temperature, and flame from the fire detection means 310 through the detection controller 330 of the liquefied gas fire extinguishing device 300. According to the fire detection information, it may be determined that a fire occurs through any one of gas generation, smoke generation, reference temperature exceeding, and flame generation.

As a result of the check in step 517, if a fire does not occur according to the fire detection information, the second controller 240 controls the liquefied gas storage device 200 and the liquefied gas fire extinguishing device 300 to maintain the current state. Yes (step 518).

On the other hand, as a result of the check in step 517, if a fire occurs, the second controller 240 of the liquefied gas storage device 200 controls the vaporized gas tank 230 and the second liquefied gas storage tank 210 to The liquefied gas may be supplied from the second liquefied gas storage tank 210 to the liquefied gas fire extinguishing device 300 (step 519).

For example, the second controller 240 controls the vaporized gas tank 230 to supply the vaporized gas for adjusting the supply pressure to the second liquefied gas storage tank 210, and controls the second liquefied gas storage tank 210. liquefied gas in the second liquefied gas storage tank 210 by opening the 7th on-off valve 214 and the 11th on-off valve 321 while supplying the liquefied gas to the second supply line 213 liquefied gas fire extinguishing device It can be controlled through the detection controller 330 to spray through the injection nozzle 322 provided in the liquefied gas injector 320 of (300).

Here, in the second controller 240, the eighth on-off valve 215 provided on the supply recovery line 123 is closed, and the ninth on-off valve 216 discharging the second vaporized liquefied gas is closed. Control to supply the liquefied gas to the liquefied gas fire extinguishing device 300 by increasing the second internal pressure of the second liquefied gas storage tank 210 due to the supply of the vaporized gas for filling the supply pressure of the vaporized gas tank 230 can do.

Then, in the liquefied gas fire extinguishing device 200, the supplied liquefied gas may be injected through the injection nozzle 322 of the liquefied gas injector 320 (step 520).

Here, even after the second controller 240 supplies the liquefied gas through the injection nozzle 322 by supplying it for a predetermined supply time (eg, 1 minute, 3 minutes, etc.), the liquefied gas fire extinguishing device 300 When it is determined that the fire continues according to the fire detection information including at least one of gas, smoke, temperature and flame from the fire detection means 310 of the preset additional time (eg, 1 minute, 3 minutes, etc. ) can be controlled to additionally supply liquefied gas.

The process as described above may control each component and valve to return to the original state when it is determined that the fire has stopped according to the fire detection information.

Meanwhile, the second controller 240 checks whether vaporized liquefied gas is requested from the first controller 170 of the liquefied gas generator 100 (step 521). In this step 521, when the second liquefied gas amount of the second liquefied gas storage tank 210 is less than the standard liquefied gas amount, the liquefied gas storage device 200 to the liquefied gas generator 100 may request liquefied gas supply .

Here, in the first controller 170, when vaporized liquefied gas required for gas liquefaction is required in the first liquefied gas storage tank 120, the second controller 240 provided in the liquefied gas storage device 200 provides vaporized liquefied gas. It is possible to request the supply of and control the fourth opening/closing valve 128 provided in the supply recovery line 123 to open.

As a result of the check in step 521, when vaporized liquefied gas is requested, the second controller 240 discharges the second vaporized liquefied gas vaporized in the second liquefied gas storage tank 210 to the liquefied gas generator 100. It can be supplied to the first liquefied gas storage tank 120 (step 522). In this step 522, the second liquefied gas amount can be controlled to maintain the standard liquefied gas amount by receiving the liquefied gas from the liquefied gas generator 100.

Here, the second controller 240 controls the opening of the eighth on-off valve 215 provided in the supply recovery line 123 when the supply of vaporized liquefied gas is requested from the first controller 170, while opening and closing the ninth By controlling the valve 216 to close, the second vaporized liquefied gas discharged from the second liquefied gas storage tank 210 may be supplied to the first liquefied gas storage tank 120 through the supply recovery line 123.

Therefore, according to another embodiment of the present invention, while generating and storing liquefied gas in the liquefied gas generator, the liquefied gas is supplied to the liquefied gas storage device according to the request for supply of liquefied gas and stored, and when a fire is detected, the stored The liquefied gas is supplied to the liquefied gas fire extinguishing device and sprayed to the fire area, and the liquefied gas storage device discharges the liquefied gas from the liquefied gas storage device to the liquefied gas generator according to the supply request from the liquefied gas generator. It is possible to re-liquefy the vaporized liquefied gas while supplying it, so energy efficiency can be improved.

Claims (12)

A liquefied gas generator for generating and storing liquefied gas and supplying the liquefied gas in response to a supply request of the liquefied gas;
Requesting the supply of the liquefied gas to the liquefied gas generator, storing the liquefied gas supplied from the liquefied gas generator, supplying the stored liquefied gas when a fire is detected, and supplying the liquefied gas from the liquefied gas generator a liquefied gas storage device for discharging vaporized liquefied gas to the liquefied gas generator according to a supply request; and
An automatic fire extinguishing system using liquefied gas comprising: a liquefied gas fire extinguishing device providing fire detection information to the liquefied gas storage device and injecting the liquefied gas supplied under control of the liquefied gas storage device. The method of claim 1,
The liquefied gas generator,
a gas generator generating supply gas;
a first liquefied gas storage tank in which the liquefied gas supplied with the supplied gas is stored;
a refrigerator provided in the first liquefied gas storage tank and driven according to a refrigerator driving signal to liquefy the supplied gas;
a compressor for circulating the refrigerant inside the refrigerator;
a supply gas cylinder selectively supplying additional gas to the first liquefied gas storage tank;
First state information including a first vaporized liquefied gas amount, a first supply gas amount, a first internal pressure, a first internal temperature, and a first liquefied gas amount for the first liquefied gas storage tank for the first liquefied gas storage tank a first state measurement means for measuring; and
The supply gas or additional gas while selecting and controlling the supply of the supply gas or the additional gas so that the difference between the first supply gas amount and the first vaporized liquefied gas amount maintains a reference difference amount so that the first liquefied gas amount maintains a reference liquefied gas amount The refrigerator and the compressor are controlled so that the gas is liquefied, and the first vaporized liquefied gas amount maintains a reference vaporized liquefied gas amount, or the first internal pressure maintains a standard internal pressure, or the first internal temperature is a standard internal pressure. An automatic fire extinguishing system using liquefied gas comprising a first controller for controlling the refrigerator and compressor to maintain temperature and supplying the liquefied gas to the liquefied gas storage device. The method of claim 2,
The liquefied gas generator,
It is connected to the first controller and displays the first state information, the first supply gas amount, and the first vaporized liquefied gas amount measured from the first liquefied gas storage tank, the gas generator, the first liquefied gas storage tank, a refrigerator, An automatic fire extinguishing system using liquefied gas further comprising: a first operation panel for inputting operation signals of the compressor, the supply gas cylinder, and the first state measuring unit. The method of claim 3,
The liquefied gas storage device,
a second liquefied gas storage tank in which the liquefied gas supplied from the liquefied gas generator is stored;
second state measuring means for measuring second state information including a second liquefied gas amount, a second vaporized liquefied gas amount, and a second internal pressure for the second liquefied gas storage tank;
a vaporization gas tank supplying vaporized gas for supply pressure adjustment to the second liquefied gas storage tank; and
The liquefied gas generator requests supply of the liquefied gas, and the liquefied gas tank and the second liquefied gas supply the liquefied gas to the liquefied gas fire extinguishing device according to the fire detection information provided from the liquefied gas fire extinguishing device. A second controller for controlling a storage tank and discharging the second vaporized liquefied gas vaporized in the second liquefied gas storage tank to the liquefied gas generator at the request of the liquefied gas generator; Automatic fire extinguishing system using. The method of claim 4,
The liquefied gas storage device,
Connected to the second controller to display the second state information measured from the second liquefied gas storage tank, and inputting operation signals of the second liquefied gas storage tank, the second state measuring means, and the vaporized gas tank 2 operation panel; automatic fire extinguishing system using liquefied gas further comprising. The method of claim 5,
The liquefied gas fire extinguishing device,
a fire detection means for measuring the fire detection information including at least one of gas, smoke, temperature and flame and providing the measured information to the liquefied gas storage device; and
An automatic fire extinguishing system using liquefied gas comprising a liquefied gas injector for injecting the liquefied gas supplied from the liquefied gas storage device. The method according to any one of claims 1 to 6,
The automatic fire extinguishing system using the liquefied gas,
An automatic fire extinguishing system using liquefied gas further comprising a control system connected to and monitoring the liquefied gas generator, the liquefied gas storage device, and the liquefied gas fire extinguishing device through a wired or wireless communication network. The method of claim 7,
In the automatic fire extinguishing system using the liquefied gas, a plurality of liquefied gas storage devices are connected to one liquefied gas generator, and a plurality of liquefied gas fire extinguishing devices are connected to one liquefied gas storage device, and the liquefied gas generator An automatic fire extinguishing system using liquefied gas in which at least one reserve device is additionally provided. supplying the supply gas generated through the gas generator to a first liquefied gas storage tank to liquefy when the liquefied gas generator is operated;
In response to a supply request of the liquefied gas from the liquefied gas storage device, the liquefied gas stored in the first liquefied gas storage tank is supplied to the liquefied gas storage device to supply the liquefied gas stored in the liquefied gas storage device to the second liquefied gas storage tank provided in the liquefied gas storage device. storing liquefied gas;
Checking whether a fire occurs in the liquefied gas storage device according to fire detection information provided from a liquefied gas fire extinguishing device;
supplying the liquefied gas from the second liquefied gas storage tank to the liquefied gas fire extinguishing device when the fire occurs; and
A method of controlling an automatic fire extinguishing system using liquefied gas, comprising: injecting the liquefied gas supplied from the liquefied gas fire extinguishing device through a liquefied gas injector. The method of claim 9,
The control method of the automatic fire extinguishing system using the liquefied gas,
After supplying and liquefying the first liquefied gas storage tank, the first supply gas amount, the first liquefied gas amount, the first internal temperature, the first vaporized liquefied gas amount, and the first internal pressure for the first liquefied gas storage tank measuring first state information that includes; and
Controlling, by a first controller, the difference between the first supply gas amount and the first vaporized liquefied gas amount to maintain a reference difference amount, and selecting and controlling the supply of the supply gas or the supply of additional gas using a supply gas cylinder; Control method of an automatic fire extinguishing system using a liquefied gas further comprising. The method of claim 10,
The control method of the automatic fire extinguishing system using the liquefied gas,
After the step of measuring the first state information, in the first controller, the first vaporized liquefied gas amount maintains the reference vaporized liquefied gas amount, or the first internal pressure maintains the reference pressure, or the first internal pressure A control method for an automatic fire extinguishing system using liquefied gas, further comprising controlling a refrigerator and a compressor so that the temperature maintains a reference internal temperature or the first liquefied gas quantity maintains a reference liquefied gas quantity. The method of claim 11,
The control method of the automatic fire extinguishing system using the liquefied gas,
After the step of storing the liquefied gas in the second liquefied gas storage tank, when the amount of the second liquefied gas in the second liquefied gas storage tank is less than the standard liquefied gas amount, requesting the supply of liquefied gas to the liquefied gas generator. ; and
Controlling an automatic fire extinguishing system using liquefied gas further comprising receiving the liquefied gas from the liquefied gas generator and controlling the second liquefied gas amount to maintain the reference liquefied gas amount.

Images