KR102271831B1 - Gas leak test system for high pressure - Google Patents

Abstract

The present invention relates to a gas leak defect inspection system, and in the process of supplying compressed air for gas leak inspection to an object to be inspected, compressed air in a relatively low pressure state and compressed air in a relatively high pressure state are sequentially performed in two steps. By supplying it over, it is possible to prevent damage due to pressure shock to the inspection object in the process of supplying high-pressure compressed air to the inspection object, and to more stably supply high-pressure compressed air to perform a safe inspection process, By generating compressed air in a relatively low pressure state through a small air compressor and supplying compressed air in a relatively high pressure state through the pressure boosting module to the inspection object, air A gas leak defect inspection system that can configure the entire facility with a compact structure without the need to enlarge the compressor and related equipment, and is easy to transport, makes it easy to perform on-site inspection of the inspection object in the actual field. to provide.

Description

Gas leak defect inspection system for high pressure {GAS LEAK TEST SYSTEM FOR HIGH PRESSURE}

The present invention relates to a gas leak defect inspection system. In more detail, in the process of supplying compressed air for gas leak inspection to the inspection object, by sequentially supplying compressed air in a relatively low pressure state and compressed air in a relatively high pressure state in two steps, the high pressure to the inspection object In the process of supplying compressed air of It is necessary to increase the size of the air compressor and related equipment despite supplying high pressure compressed air by generating compressed air in a low pressure state and supplying compressed air in a relatively high pressure state through the pressure boosting module to the inspection object. It relates to a gas leak defect inspection system that can configure the entire facility with a miniaturized structure without a vacuum, and thus can be easily transported, so that it is possible to easily perform on-site inspection of an inspection object in an actual field.

In general, various facilities for supplying gas are provided in various manufacturing plants, and it is very important for these gas facilities to stably maintain a sealed state in order to prevent gas leakage.

In addition to gas equipment used in manufacturing plants, refrigerant gas is circulated and supplied to cooling devices such as air conditioners and refrigerators widely used in vehicles, homes, offices, etc., so it is very important to keep these cooling devices sealed to prevent leakage of refrigerant gas. Do.

Since the sealing performance for preventing gas leakage is very important in various facilities using gas as described above, it is necessary to continuously inspect whether gas leaks from the facility periodically or when an operation abnormality occurs.

In general, equipment for inspecting gas leaks is configured to connect an inspection object on a gas flow line that supplies and recovers a test gas so that the test gas passes through the inspection object and is recovered again, at the front and rear ends of the inspection object, that is, , by detecting the pressure difference between the supply port part of the test gas and the recovery port part of the test gas, or by putting the test object in the water in this state and visually observing whether bubbles are generated.

In this way, since the gas leakage defect state of the inspection object is inspected in such a way that the test gas is supplied and recovered to the inspection object, only one inspection object has to be inspected by one gas leak defect inspection equipment, and accordingly, a plurality of There is a problem in that it takes a long time to inspect the object to be inspected. In addition, since the inspection operation is performed by visually observing the generation of bubbles, there is a problem that inspection accuracy is significantly lowered.

In addition, depending on the type of object to be inspected, it is necessary to increase the supply pressure of the test gas larger or it is necessary to perform inspection work with different pressures. In order to supply the high-pressure test gas, the test gas supply facility needs to be enlarged. Therefore, there are problems such as the overall size of the gas leak defect inspection equipment is enlarged, the manufacturing cost increases, the on-site inspection is impossible due to transportation difficulties, and it is impossible to apply to various equipment because it is difficult to control the supply pressure of the test gas. .

Domestic Registered Patent No. 10-1182101

The present invention was invented to solve the problems of the prior art, and an object of the present invention is to provide compressed air in a relatively low pressure state and a relatively high pressure state in the process of supplying compressed air for gas leak inspection to an object to be inspected. By sequentially supplying compressed air through two stages, damage to the inspection object due to pressure shock can be prevented in the process of supplying high-pressure compressed air to the inspection object, and it can be safely supplied by supplying high-pressure compressed air more stably. To provide a gas leak defect inspection system capable of performing an inspection process.

Another object of the present invention is to generate compressed air in a relatively low pressure state through a small air compressor and generate compressed air in a relatively high pressure state through a pressure boosting module to supply it to an object to be inspected. The entire facility can be configured with a miniaturized structure without the need to enlarge the air compressor and related equipment despite supplying It is to provide a gas leak defect inspection system.

The present invention provides a gas leak defect inspection system for connecting an inspection object having a gas flow path formed thereon to inspect whether the inspection object has a gas leakage defect, comprising: an air supply module for supplying compressed air; a first regulator disposed downstream of the air supply module so that the compressed air supplied by the air supply module passes through and constantly adjusting the pressure of the compressed air to a first reference pressure state; a pressure-increasing module that receives the compressed air that has passed through the first regulator and boosts the pressure to a second reference pressure higher than the first reference pressure; The first regulator and the pressure-increasing module and the connecting line are connected so that the compressed air in the first reference pressure state that has passed through the first regulator flows in or the compressed air in the second reference pressure state that has passed through the pressure-increasing module flows in a multi-manifold connected through, and having a plurality of exhaust ports to discharge the compressed air introduced therein; a plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold, and the other end formed to be connected to the inspection object; an on/off valve respectively mounted on the connection line and the supply line; a pressure measuring sensor respectively mounted on the plurality of supply lines downstream from the position of the on-off valve to measure internal pressures of the plurality of supply lines; and a control unit for controlling the operation of the air supply module and the on/off valve, wherein the control unit is configured such that the compressed air of the first reference pressure state and the compressed air of the second reference pressure state are sequentially supplied to the multi-manifold The control unit operates and controls the opening/closing valve on the connection line, and the control unit receives the measurement values of the plurality of pressure measurement sensors, and based on the amount of change over time of the received measurement values, the plurality of inspection objects connected to the plurality of supply lines, respectively. It provides a gas leak defect inspection system, characterized in that for determining whether each gas leak defect for the.

At this time, the control unit opens the on/off valve on the supply line until the measured value of the pressure measuring sensor becomes the second reference pressure state, and when the measured value of the pressure measuring sensor becomes the second reference pressure state , closing the on/off valve on the supply line, calculating the change in the measured value of the pressure measuring sensor for a reference time while the on/off valve on the supply line is closed, and the calculated change in the measured value is greater than or equal to the preset reference change , it may be determined that there is a gas leakage defect with respect to the inspection object.

In addition, the connection line connected to the outlet end of the first regulator is branched into two in the middle section, one extending to the multi-manifold side and the other extending to the boosting module side, and the on/off valves are provided in the two branch lines, respectively. can be mounted

In addition, a separate intermediate manifold having two inlet ports and one outlet port is disposed on the upstream side of the multi-manifold, and the two branch lines are respectively connected to the inlet ports of the intermediate manifold so that compressed air is supplied to the It may be introduced into the multi-manifold through the intermediate manifold.

In addition, the control unit sequentially opens and operates the on/off valves respectively mounted on the two branch lines, so that the compressed air in the first reference pressure state and the compressed air in the second reference pressure state are sequentially supplied to the multi-manifold. can do.

In addition, the air supply module, the air compressor for supplying compressed air; a first air tank receiving and storing compressed air from the air compressor, and having a connection line coupled to one side so that the stored compressed air is supplied to the first regulator; an air filter mounted on the connection line to filter compressed air; and an air dryer mounted on the connection line to remove moisture from the compressed air.

In addition, the air compressor may have a capacity capable of supplying compressed air to the first reference pressure state.

In addition, the pressure-increasing module may include: an air booster that receives the compressed air in the first reference pressure state that has passed through the first regulator and increases the pressure of the supplied compressed air to be higher than the first reference pressure; a second air tank receiving and storing the compressed air pressurized by the air booster; and a second regulator disposed downstream of the second air tank so that the compressed air stored in the second air tank is supplied and passed through to constantly adjust the pressure of the compressed air to the second reference pressure state.

In addition, a temperature and humidity sensor capable of measuring the temperature and humidity of compressed air flowing through the supply line inner flow path may be mounted on the supply line.

According to the present invention, in the process of supplying compressed air for gas leak inspection to an inspection object, by sequentially supplying compressed air in a relatively low pressure state and compressed air in a relatively high pressure state in two steps, In the process of supplying high-pressure compressed air, it is possible to prevent damage to the inspection object due to pressure shock, and it is possible to more stably supply high-pressure compressed air to perform a safe inspection process.

In addition, by generating compressed air in a relatively low pressure state through a small air compressor and supplying compressed air in a relatively high pressure state through the pressure boosting module to the inspection object, even though high pressure compressed air is supplied In addition, the entire facility can be configured in a miniaturized structure without the need to enlarge the air compressor and related equipment, and thus, it is easy to transport, so that it is possible to easily perform on-site inspection of the inspection object in the actual field.

1 is a view schematically showing the overall configuration of a gas leak defect inspection system according to an embodiment of the present invention;
2 is a functional block diagram functionally showing a control-related configuration of a gas leak defect inspection system according to an embodiment of the present invention;
3 and 4 are diagrams showing the compressed air flow state of the gas leak defect inspection system according to an embodiment of the present invention in stages.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a diagram schematically showing the overall configuration of a gas leak defect inspection system according to an embodiment of the present invention, Figure 2 is a functional view of the control-related configuration of the gas leak defect inspection system according to an embodiment of the present invention It is a functional block diagram shown, and FIGS. 3 and 4 are diagrams showing the compressed air flow state of the gas leak defect inspection system according to an embodiment of the present invention in stages.

A gas leak defect inspection system according to an embodiment of the present invention connects the inspection object 10 having a gas flow path for supplying gas, such as a gas facility, a cooling facility, etc. to inspect the gas leak defect for the test object 10 As a system, a high-pressure compressed air may be supplied to perform an inspection of the inspection object 10 , and the air supply module 100 , the first regulator 200 , the pressure-increasing module 800 , and the first regulator (200) and the multi-manifold 300 connected through the connection line (L) to the boosting module 800, a plurality of supply lines 400, and each connection line (L) and the supply line 400 are mounted on It is configured to include an opening/closing valve 500 , a pressure measuring sensor 600 mounted on the supply line 400 , and a control unit 700 .

The air supply module 100 is a device for supplying compressed air, and the air compressor 110 for supplying compressed air, receives compressed air from the air compressor 110 and stores it, and stores the stored compressed air in the first regulator 200 . ) to be supplied to the first air tank 120 to which the connection line (L) is coupled to one side, the air filter 130 mounted on the connection line (L) to filter compressed air, and the connection line (L) It may be configured to include an air dryer 140 to remove moisture in the compressed air. The air filter 130 may be disposed upstream and downstream of the air dryer 140, respectively, and may be formed to filter foreign substances and moisture contained in the compressed air.

The first regulator 200 is disposed downstream of the air supply module 100 so that the compressed air supplied by the air supply module 100 passes to constantly adjust the pressure of the compressed air to the first reference pressure state. A general pressure regulator may be applied to the first regulator 200, and the general pressure regulator functions to adjust the pressure so that the fluid flowing in a state in which the pressure value changes minutely is stably and constantly maintained at the set pressure state. Therefore, a detailed description thereof will be omitted.

The pressure-increasing module 800 is configured to receive the compressed air that has passed through the first regulator 200 and increase the pressure to a second reference pressure higher than the first reference pressure. An air booster 810 that receives compressed air of a reference pressure state and increases the pressure of the supplied compressed air to be higher than the first reference pressure, and a second that receives and stores the compressed air pressurized by the air booster 810 The air tank 820 and the second air tank 820 are disposed downstream of the second air tank 820 so that the compressed air stored in the air tank 820 is supplied and passed to increase the pressure of the compressed air to a second reference pressure higher than the first reference pressure. It may be configured to include a second regulator 830 that constantly adjusts the state. According to this configuration, the compressed air in the first reference pressure state that has passed through the first regulator 200 sequentially passes through the air booster 810, the second air tank 820, and the second regulator 830 and passes through the second reference pressure. It can be increased to a pressure state. The compressed air pressurized in the air booster 810 is temporarily stored in the second air tank 820 and passes through the second regulator 830 in a stabilized state, and is adjusted to the second reference pressure state, so that the pressure state of the compressed air is adjusted. The second reference pressure may be more stably maintained.

The multi-manifold 300 is a first regulator such that compressed air of a first reference pressure state that has passed through the first regulator 200 is introduced or that compressed air of a second reference pressure state that has passed through the pressure boosting module 800 is introduced. 200 and the pressure-increasing module 800 are respectively connected through a connection line (L). Each connection line (L) is equipped with an opening/closing valve 500 to open and close the internal flow path of each connection line (L). A plurality of discharge ports 320 are formed in the multi-manifold 300 so that the compressed air introduced therein is discharged.

A separate intermediate manifold 350 having two inlet ports 351 and one outlet port 352 formed on the upstream side of the multi-manifold 300 may be provided, and the first regulator 200 having passed through Compressed air in a reference pressure state and compressed air in a second reference pressure state that has passed through the pressure-increasing module 800 are respectively introduced into the intermediate manifold 350 through two inlet ports 351, and one outlet port ( 352 , and may be configured to flow into the multi-manifold 300 . By providing the intermediate manifold 350 in this way, only one inlet port 310 may be formed in the multi-manifold 300 .

The supply line 400 is formed such that one end is coupled to the discharge port 320 of the multi-manifold 300 and the other end is connected to the inspection object 10 . A plurality of such supply lines 400 are provided and are respectively connected to a plurality of discharge ports 320 of the multi-manifold 300 , and the inspection object 10 is connected to each supply line 400 , respectively.

The supply line 400 is equipped with an opening/closing valve 500 capable of opening and closing the flow path of the supply line 400 , and a pressure measuring sensor 600 capable of measuring the internal pressure of the supply line 400 is mounted. . The pressure measuring sensor 600 is respectively connected to a point downstream of the position of the on-off valve 500 on the supply line 400 . In addition, the supply line 400 may be equipped with a temperature and humidity sensor 610 capable of measuring the temperature and humidity of the compressed air flowing through the internal flow path of the supply line 400 .

The control unit 700 operates and controls the air supply module 100 and the on/off valve 500 , and controls the flow of compressed air. The controller 700 sequentially distributes the compressed air in the first reference pressure state that has passed through the first regulator 200 and the compressed air in the second reference pressure state that has passed through the pressure-increasing module 800 to the multi-manifold 300 . Operational control of the on/off valve 500 on the connection line L to be supplied, and also receiving the measured value of the pressure measuring sensor 600, and based on the amount of change with time of the applied measured value, the supply line 400 It is determined whether there is a gas leak defect for the inspection object 10 connected to.

Looking in more detail, the connection line (L) connected to the outlet end of the first regulator 200 is branched into two in the middle section, one extending to the multi-manifold 300 side and the other extending to the boosting module 800 side. , the on-off valve 500 is mounted on the two branch lines, respectively. The two branch lines are respectively connected to the inlet port 351 of the intermediate manifold 350 so that compressed air flows into the multi-manifold 300 through the intermediate manifold 350 . In addition, the connection line (L) connected to the outlet end of the first regulator 200 is equipped with a three-port fitting member 910 having three separate ports on the upstream side of the branching point into two branch lines, A connection line (L) is respectively coupled to two ports of the 3-port fitting member 910 , and a separate pressure measuring sensor 600 is mounted to one port of the compressed air passing through the first regulator 200 . It may be detected whether the pressure is in the first reference pressure state.

The control unit 700 sequentially opens and operates the on/off valves 500 respectively mounted on the two branch lines, whereby the compressed air of the first reference pressure state and the compressed air of the second reference pressure state are sequentially transferred to the multi-manifold 300 ) can be supplied.

That is, first, the opening/closing valve 500 mounted on the branch line connected to the first regulator 200 is opened and operated, and the opening/closing valve 500 mounted on the branch line connected to the pressure boosting module 800 is closed. When operated, as shown in FIG. 3 , the compressed air in the first reference pressure state that has passed through the first regulator 200 is introduced into the multi-manifold 300 through the intermediate manifold 350 and supplied to the supply line 400 . is supplied to the inspection object 10 along the At this time, the on-off valve 500 mounted on the supply line 400 is continuously maintained in an open state. Thereafter, when the on/off valve 500 mounted on the branch line connected to the first regulator 200 is closed and operated, the on/off valve 500 mounted on the branch line connected to the pressure boosting module 800 is opened. , as shown in FIG. 4 , the compressed air in the second reference pressure state that has passed through the pressure-increasing module 800 is introduced into the multi-manifold 300 through the intermediate manifold 350 and inspected along the supply line 400 . It is supplied to the object (10).

According to this operation process, compressed air in a first reference pressure state, which is a relatively low pressure, is first supplied to the inspection object 10 , and then compressed air in a second reference pressure state that is a relatively high pressure (final supply pressure) is supplied to the inspection object 10 . supplied sequentially.

At this time, the control unit 700 opens and operates the on/off valve 500 on the supply line 400 until the measured value of the pressure measuring sensor 600 mounted on the supply line 400 becomes the second reference pressure state, and , when the measured value of the pressure measuring sensor 600 becomes the second reference pressure state, the on-off valve 500 is operated to close. Thereafter, the amount of change in the measured value of the pressure measuring sensor 600 is calculated for a reference time in a state in which the on/off valve 500 is closed and operated, and if the calculated change in the measured value is greater than or equal to the preset reference change amount, the test object 10 is It is judged that there is a gas leak defect.

That is, the compressed air supplied by the air supply module 100 is stabilized to the first reference pressure state through the first regulator 200 and is primarily supplied to the inspection object 10 , and then, the first regulator 200 ) and the pressure-increasing module 800 , the pressure is increased to the second reference pressure state, and is secondarily supplied to the test object 10 .

In this way, in the process in which the compressed air is supplied to the inspection object 10 through the supply line 400 in two stages, the on-off valve 500 on the supply line 400 is opened, and the compressed air is supplied to the inspection object 10 inside. When all of the gas passages are supplied and filled, the internal passages of the supply line 400 are also filled with compressed air to achieve the second reference pressure state. When the second reference pressure state is measured by the pressure measuring sensor 600 , the on-off valve 500 is operated to close and is maintained in this state for a reference time. In this way, in a state in which compressed air is filled in the inspection object 10 at the second reference pressure state, if there is no gas leakage defect in the inspection object 10 , the second reference pressure is maintained as it is, but the gas in the inspection object 10 is If a gas leak occurs due to a leak defect, the second reference pressure cannot be maintained as it is and a pressure drop occurs. Since these pressure change states are all measured by the pressure measuring sensor 600 , if the pressure change measured by the pressure measuring sensor 600 is greater than or equal to the reference change amount, it is determined that the inspection object 10 has a gas leak defect.

At this time, since the pressure of the compressed air may change naturally according to the temperature and humidity of the compressed air, a temperature and humidity sensor 610 capable of measuring the temperature and humidity of the compressed air is mounted on the supply line 400 , and the control unit 700 ) receives the measurement value of the temperature-humidity sensor 610, and whether the pressure change by the pressure measurement sensor 600 is an effect of temperature and humidity or is it due to a gas leak defect in consideration of the measurement value of the applied temperature-humidity sensor 610? It can be determined whether or not, and through this, it is possible to correct or verify a result of determining whether a gas leak defect is present for the above-described inspection object 10 .

In addition, in the gas leak defect inspection system according to an embodiment of the present invention, a plurality of exhaust ports 320 are formed in the multi-manifold 300 , and the supply line 400 is connected to each exhaust port 320 . And, since the inspection object 10 is connected to each supply line 400 , it is possible to simultaneously determine whether there is a gas leakage defect with respect to the plurality of inspection objects 10 during one inspection operation. In particular, by forming a structure that only supplies compressed air to the inspection object 10 and does not collect it again, a plurality of inspection objects 10 can be connected in parallel through the multi-manifold 300, so that a plurality of The inspection object 10 may be inspected at the same time.

According to such a configuration, the gas leak defect inspection system according to an embodiment of the present invention sequentially supplies compressed air in a low pressure state and compressed air in a high pressure state in two stages, thereby inspecting the object 10 ) in the process of supplying high-pressure compressed air to the inspection object 10 can be prevented from being damaged by the pressure impact.

That is, when the pressure of compressed air required for the inspection of the inspection object 10 is a relatively high high pressure (second reference pressure), in the process of supplying the compressed air to the inspection object 10, the 2 If compressed air in a reference pressure state (high pressure state) is supplied from the beginning, damage may occur to the inspection object 10 by the supply of high-pressure compressed air. In one embodiment of the present invention, as described above, the initial constant The compressed air of the first reference pressure state, which is a relatively low pressure for a period of time, is supplied to the inspection object 10 , and then, the compressed air of the second reference pressure state, which is a relatively high pressure, is sequentially supplied to the inspection object 10 . By supplying it, it is possible to prevent pressure damage of the inspection object 10 .

At this time, the air compressor 110 of the air supply module 100 may be applied with a capacity capable of supplying compressed air at a first reference pressure state. Even if the pressure capacity is applied, compressed air can be supplied by increasing the pressure up to the second reference pressure state, which is a relatively high pressure state, through the pressure boosting module 800 , and in particular, the first air compressor 110 in a relatively low pressure state By applying the reference pressure capacity, the size of the air compressor 110 can be miniaturized, and accordingly, the overall system can be miniaturized and transported, so that the on-site inspection of the inspection object 10 is possible in the actual field.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: Inspection object
100: air supply module
110: air compressor
120: first air tank
130: air filter
140: air dryer
200: first regulator
300: multi manifold
350: intermediate manifold
400: supply line
500: on-off valve
600: pressure measuring sensor
610: temperature and humidity sensor
700: control unit
800: pressure boosting module
810: air booster
820: second air tank
830: second regulator

Claims (9)

In the gas leakage defect inspection system for inspecting whether the inspection object has a gas leakage defect by connecting the inspection object having a gas flow path,
an air supply module for supplying compressed air;
a first regulator disposed downstream of the air supply module so that the compressed air supplied by the air supply module passes through and constantly adjusting the pressure of the compressed air to a first reference pressure state;
a pressure-increasing module for receiving the compressed air that has passed through the first regulator and increasing the pressure to a second reference pressure higher than the first reference pressure;
The first regulator and the pressure-increasing module and a connection line are connected so that the compressed air in the first reference pressure state that has passed through the first regulator flows in or the compressed air in the second reference pressure state that has passed through the pressure-increasing module flows in a multi-manifold connected through, and having a plurality of exhaust ports to discharge the compressed air introduced therein;
a plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold, and the other end formed to be connected to the inspection object;
an on/off valve respectively mounted on the connection line and the supply line;
a pressure measuring sensor respectively mounted on the plurality of supply lines downstream from the position of the on-off valve to measure internal pressures of the plurality of supply lines; and
A control unit for controlling the operation of the air supply module and the on/off valve
including,
The connection line connected to the outlet end of the first regulator is branched into two in the middle section, one extending to the multi-manifold side and the other extending to the pressure-increasing module side, and the on/off valves are mounted on the two branch lines, respectively, ,
A separate intermediate manifold having two inlet ports and one outlet port is disposed on the upstream side of the multi-manifold,
The two branch lines are respectively connected to the inlet ports of the intermediate manifold so that compressed air flows into the multi-manifold through the intermediate manifold,
The air supply module is
an air compressor that compresses and supplies air;
a first air tank receiving and storing compressed air from the air compressor, and having a connection line coupled to one side so that the stored compressed air is supplied to the first regulator;
an air filter mounted on the connection line to filter compressed air; and
and an air dryer mounted on the connection line to remove moisture from the compressed air,
The boost module is
an air booster receiving the compressed air in the first reference pressure state that has passed through the first regulator and increasing the pressure of the supplied compressed air to be higher than the first reference pressure;
a second air tank receiving and storing the compressed air pressurized by the air booster; and
and a second regulator disposed downstream of the second air tank so that the compressed air stored in the second air tank is supplied and passed to constantly adjust the pressure of the compressed air to the second reference pressure state,
A separate 3-port fitting member is mounted on a connection line connected to the outlet end of the first regulator on an upstream side of a branching point into two branch lines, and one port of the 3-port fitting member has the first regulator A separate pressure measuring sensor that can detect whether the pressure of the compressed air that has passed through is in the first reference pressure state is installed,
The control unit sequentially opens and operates the on/off valves respectively mounted on the two branch lines, so that the compressed air in the first reference pressure state and the compressed air in the second reference pressure state are sequentially supplied to the multi-manifold,
the control unit
The opening/closing valve on the supply line is opened until the measured value of the pressure measuring sensor reaches the second reference pressure state, and when the measured value of the pressure measuring sensor becomes the second reference pressure state, the Close the on/off valve,
In a state in which the on/off valve on the supply line is closed and operated, the measured value change amount of the pressure measurement sensor is calculated for a reference time, and if the calculated measured value change amount is greater than or equal to a preset reference change amount, there is a gas leak defect for the inspection object Gas leak defect inspection system, characterized in that it is determined.
delete delete delete delete delete The method of claim 1,
The air compressor is a gas leak defect inspection system, characterized in that the capacity for supplying compressed air in the first reference pressure state is applied.
delete The method of claim 1,
A gas leak defect inspection system, characterized in that a temperature and humidity sensor capable of measuring the temperature and humidity of compressed air flowing through the supply line internal flow path is mounted on the supply line.

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