KR100895036B1 - Compressed natural gas Regulator - Google Patents

Abstract

The present invention relates to a compressed natural gas regulator for heating the heat exchange tube through which the compressed natural gas is guided by a coolant flowing into the regulator to increase the temperature of the compressed natural gas.

To this end, the present invention, in the compressed natural gas regulator 100 is provided with a diaphragm means 360 and the valve assembly 250 to reduce the pressure of the incoming fuel gas discharged at a constant pressure, the main body is formed with a flow path of the fuel gas ( A coolant chamber 440 formed inside the coolant 200 and filled with a coolant for cooling the engine; And a heat exchange tube 500 provided inside the coolant chamber 440 to be connected to the flow path of the fuel gas so that the fuel gas is heat-exchanged while passing through the coolant chamber 440. According to this invention which has such a structure, there exists an effect which the performance of a regulator improves.

Compressed Natural Gas, Recirculator, Regulator, Heat Exchanger, Valve

Description

Compressed natural gas regulator

1 is a cross-sectional view showing the structure of a compressed natural gas regulator according to the prior art.

Figure 2 is a perspective view showing the upper appearance of the compressed natural gas regulator according to the present invention.

Figure 3 is a perspective view showing the lower appearance of the compressed natural gas regulator according to the present invention.

Figure 4 is an exploded perspective view showing the configuration of the compressed natural gas regulator according to the present invention.

Figure 5 is a cross-sectional view showing a coupling relationship of the natural gas regulator according to the present invention.

Figure 6 is a perspective view showing the appearance of the heat exchange tube that is the main configuration of the compressed natural gas regulator according to the present invention.

Figure 7 is a cross-sectional view showing a flow path of the compressed natural gas regulator according to the present invention.

8 is a cross-sectional view taken along line B-B 'of FIG.

FIG. 9 is a cross-sectional view taken along line CC ′ of FIG. 7. FIG.

FIG. 10 is a cross-sectional view taken along line D-D 'of FIG. 7;

Explanation of symbols on the main parts of the drawings

100. Regulator 200. Main unit

250. Valve assembly 280. Valve bushing

300. Head 360. Diaphragm Means

400. Cap 440. Coolant Chamber

500. Heat Exchanger Tube

The present invention relates to a vehicle regulator using compressed natural gas, and more particularly, to a compressed natural gas regulator in which a heat exchange tube through which the compressed natural gas is guided by a coolant flowing into the regulator is heated to raise the temperature of the compressed natural gas. It is about.

In general, a vehicle regulator for supplying compressed natural gas (CNG) fuel is generally used in various vehicles such as a large commercial vehicle, and a gas of about 15 to 250 bar from a tank containing compressed natural gas is stored. It functions to directly supply the static pressure required by the injector in response to changes in the load of the engine, tank pressure and changes in the surrounding operating environment.

In addition, the flow rate, pressure, and temperature characteristics of the regulator have a direct influence on a power source such as an engine, and thus may be referred to as a main configuration that is involved in the performance of the vehicle.

A typical configuration of such a conventional regulator is disclosed in Korean Patent No. 10-0210971, which is briefly described through the drawings as follows.

1 is a cross-sectional view illustrating a structure of a compressed natural gas regulator according to the prior art, and as shown in the drawing, the compressed natural gas regulator 10 according to the prior art includes an inner chamber for accommodating a high pressure compressed natural gas therein ( 30 and the outer body 34 provided with the outer chamber 34 for storing the low pressure compressed natural gas therein, and the bonnet 12 mounted on the regulator body 18, the overall appearance is formed.

 The regulator main body 18 includes a gas inlet 32 for allowing gas to flow into the inner chamber 30, and a gas outlet 34 for discharging gas from the outer chamber 34, respectively. It is formed so as to penetrate into the inside of the regulator body 18 from the outside of (18).

The regulator body 18 senses the pressure of the valve member 90 and the gas outlet 34 which are movably disposed inside the tubular body 92 to adjust the gas flow between the chambers. There is further provided a diaphragm means 46 connected to the valve member 90 to affect the movement of the valve member 90.

In addition, inside the regulator body 18, a valve spring 94 partially included in the tubular body 92, and mounted on the regulator body 18, the tubular body 92 and the valve spring 94. And a conical bottom of the valve member 90 to regulate gas flow from the inner chamber 30 to the outer chamber 34 having a bushing therein adapted to receive The valve seat 82 is provided on the upper portion of the valve body 60.

And, the upper end of the valve member 90 is coupled to the lower surface of the substantially central portion of the diaphragm means 46, the valve plug 96 is fixed to the plug guide 100 to operate in conjunction with the diaphragm means 46 It becomes possible.

However, the compressed natural gas regulator according to the prior art as described above has the following problems.

In such a prior art, a relatively high pressure compressed natural gas 96 is introduced, and the introduced fuel gas passes between a narrow gap between the valve member 90 and the valve seat 82. In addition, the fuel gas passing through the valve seat 82 expands while being in a low pressure state, and the temperature drops to about -40 ° C.

When a small amount of fluid is used, even if the temperature of the fuel gas is low, it is not a big problem.However, when a relatively large amount of fluid is used, when the temperature of the fuel gas is low, it may cause a problem when the engine is ignited or block the flow path of the valve. Problem occurs.

Therefore, in order to solve this problem, a separate heat exchanger is installed in the system together with the regulator to increase the temperature of the supplied gas.

However, by installing such a separate heat exchanger, the size of the entire system is not only increased, but there are problems such as an increase in cost and an increase in labor for implementing the system.

An object of the present invention is to solve the problems of the prior art as described above, a compressed natural gas regulator for heating the heat exchange tube guided by the compressed natural gas guided by the coolant flowing into the regulator to increase the temperature of the compressed natural gas To provide.

Another object of the present invention is to provide a compressed natural gas regulator which makes the configuration of the valve assembly more compact.

Compressed natural gas regulator according to the present invention for achieving the object as described above, the diaphragm means and the valve assembly is provided in the compressed natural gas regulator for reducing the fuel gas flows into a constant pressure, the flow path of the fuel gas A coolant chamber formed inside the main body, the coolant chamber filled with a coolant for cooling the engine; And a heat exchange tube provided inside the coolant chamber and connected to the flow path of the fuel gas to allow the fuel gas to exchange heat while bypassing the coolant chamber.

In addition, the compressed natural gas regulator according to the present invention for achieving the above object, the fuel gas is in and out, the main body through which the coolant for cooling the engine in and out; A fuel gas flow path provided inside the main body and forming a passage through which fuel gas flows; A valve assembly provided on the fuel gas flow path and configured to control a flow rate of the fuel gas;

Diaphragm means provided on an inner side of the main body to control an operation of the valve assembly; And a heat exchange tube communicating with the fuel gas flow path to guide the flow of the fuel gas and provided on one side of the main body filled with a coolant to increase the temperature of the fuel gas by heat exchange.

According to the present invention having such a configuration, it is possible to expect the effect of improving the performance of the regulator and the system equipped with the regulator.

Hereinafter, an embodiment of a compressed natural gas regulator according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing the upper outline of the compressed natural gas regulator according to the present invention, Figure 3 is a perspective view showing the lower outline of the compressed natural gas regulator according to the present invention.

As shown in these figures, the outer shape of the regulator 100 has a main body 200, a head 300 coupled to the upper portion of the main body 200, and a cap 400 coupled to the lower portion of the main body 200. Is formed by.

The main body 200 forms a flow path of fuel gas and a coolant, the center portion is formed in a substantially hexahedral shape, and each corner is formed to be inclined. In addition, the upper and lower portions of the central portion of the main body 200 extend upward and downward in a cylindrical shape, respectively, and a space for mounting a plurality of flow paths and other components is provided therein.

A gas outlet 212 through which fuel gas is discharged is formed on the first surface 210 of the main body 200, and a coolant outlet through which a coolant for cooling other components, such as an engine, enters and exits the gas outlet 212. 214 and coolant inlet 216 are formed side by side. The gas outlet 212, the coolant outlet 214, and the coolant inlet 216 may be formed to protrude outward to facilitate connection with other hoses and pipes.

Meanwhile, a release valve 222 is mounted on the second surface 220 of the main body 200. The release valve 222 is selectively opened to protect the system when the discharged fuel gas is higher than the required pressure to discharge the high-pressure fuel gas to the outside, and the second surface of the main body 200 ( 220 is formed to protrude outward.

In addition, a gas inlet 232 through which fuel gas flows is formed on the third surface 230 of the main body 200. The gas inlet 232 also protrudes from the third surface 230 of the main body 200 to be easily connected to other hoses and pipes, and is formed on a surface opposite to the gas outlet 212.

The head 300 is coupled to the upper surface of the main body 200. The head 300 is formed in a substantially cylindrical shape, the lower end is formed to protrude outward, is coupled to the upper portion of the main body 200. In addition, the cap 400 is coupled to the lower surface of the main body 200. The cap 400 is formed in a shape corresponding to the lower surface of the main body 200, the grip portion 420 for the user to grip is protruded to the center portion to facilitate coupling and separation.

4 is an exploded perspective view showing the configuration of the compressed natural gas regulator according to the present invention, Figure 5 is a cross-sectional view showing a coupling relationship of the compressed natural gas regulator according to the present invention.

Looking at the internal configuration of the regulator 100 in more detail as shown in these figures, the upper portion of the head 300 is formed with an upper head 320 is formed in a narrower cross-section, the upper head 320 Inside the spring is provided with the spring support 322 and the spring 324.

The spring 324 provides elasticity so that the valve assembly 250, which will be described in detail below, upon opening of the fuel gas, may be opened by a predetermined gap, and a compression spring having a predetermined compression force is adopted.

And, the spring support 322 is provided above the spring 324 to support the spring 324 from above, the lower side is inserted and supported from above the spring 324, the spring support The upper end of the earth 322 is engaged with a screw 326 penetrating the upper surface of the head 300.

The screw 326 to adjust the position of the spring support 322, it is possible to adjust the downward movement distance of the spring support 322 according to the fastening degree, to adjust the elastic force of the spring 324 It becomes possible. Thus, the user can adjust the gap of the valve assembly 250 by adjusting the screw 326 according to the pressure required by the system.

On the other hand, the head lower portion 340 is provided with a diaphragm means 360. The diaphragm means 360 has a diaphragm 362 formed in a disc shape to shield the opened upper surface of the main body 200, a diaphragm plate 364 overlapping the upper surface of the diaphragm 362, and the diaphragm. A fixing nut 366 and a diaphragm fixture 368 provided at an upper portion and a lower portion of the 362 and the diaphragm plate 364 so as to penetrate substantially through a central portion thereof.

The outer end of the diaphragm 362 is seated and fixed along the upper circumference of the main body 200, the upper portion of the main body and the diaphragm 362 forms a predetermined space, the diaphragm 362 and the main body 200 The space formed by the upper part is communicated with the gas outlet 212 side by the orifice 674.

On the other hand, the central portion of the main body 200 is penetrated so that the valve assembly 250 can be inserted, and forms the outer chamber 260 when the valve assembly 250 is mounted. The valve assembly 250 includes a valve member 251, a valve spring 252, an upper fixture 253, a lower fixture 254, and a valve seat 255.

The valve member 251 has a rod shape having a predetermined diameter, and a mushroom-shaped poppet 251a is formed at a lower end thereof. The poppet 251a forms a gap with the valve seat 255, and the valve member ( The opening degree of fuel gas is adjusted according to the shanghai east of 251.

A flange 251b protruding outward is formed on the upper portion of the valve member 251 to prevent the upper fixture 253 mounted on the valve member 251 from being detached, and the flange 251b and the poppet 251a. Between the plugs 251c protruding outward is formed.

The plug 251c is mounted to penetrate the lower fixture 254, and the center portion of the lower fixture 254 may be guided by the lower fixture 254 at the same time as the valve member 251. It is formed to have an outer diameter corresponding to the inner diameter of.

A valve spring 252 is interposed between the upper fixture 253 and the lower fixture 254. The valve spring 252 is to provide elasticity for the return of the valve member 251, a compression spring is employed.

 In this case, the upper fixture 253 is inserted into and fixed inside the diaphragm fixture 368, and the lower fixture 254 is fixed to one side of the main body 200 vertically below the upper fixture 253. Accordingly, the valve member 251 is movable up and down according to the vertical movement of the diaphragm fixture 368 coupled with the diaphragm 362, and the main body 200 is moved upward and downward by the valve member 251. The gap between the valve seat 255 fixed to the lower side and the poppet 251a can be adjusted.

On the other hand, a cylindrical sleeve 270 having a predetermined diameter is formed in the substantially open lower side of the main body 200. A thread is formed on an inner circumferential surface of the cylindrical sleeve 270 to be coupled to an outer circumferential surface of the valve bushing 280 inserted into the cylindrical sleeve 270.

That is, the valve bushing 280 is inserted into the inner space of the cylindrical sleeve 270, and a thread is formed at one side of the outer circumferential surface of the valve bushing 280 to rotate the valve bushing 280. Insertion and coupling of 251 may be accomplished.

The valve bushing 280 is an operation unit 282 formed in a polygonal shape so that the user is easy to grip and rotate, and formed on the operation unit 282, the coupling thread is formed is coupled to the thread of the cylindrical sleeve 270 The extension portion 284 and an extension portion formed on the coupling portion 284 and formed into a stepped cylindrical shape inward of the coupling portion 284 and extending to an inner upper end of the cylindrical sleeve 270 ( 286).

An inner chamber 290 is formed inside the extension part 286, and a through hole 286a is formed around the extension part 286 to allow fuel gas to enter and exit. In addition, a filter 288 is mounted on the outer circumference of the extension part 286.

The filter 288 is to filter foreign matters contained in the fuel gas flowed in. The fuel 288 is interposed in the space between the valve bushing 280 and the cylindrical sleeve 270 and flows into the inner chamber 290. It will filter the gas.

In addition, a valve seat 255 is interposed between the upper end of the valve bushing 280 and the inner upper surface of the cylindrical sleeve 270. The valve seat 255 acts on the poppet 251a of the valve member 251, and thus the flow rate of cold air can be adjusted according to the gap between the valve member 251 and the poppet 251a.

Meanwhile, a coolant chamber 440 is formed between the lower side of the main body 200, more specifically, the outer side of the cylindrical sleeve 270 and the lower circumference of the main body 200. The coolant chamber 440 is formed to be opened downward, and is configured to be shielded by the cap 400 is coupled below.

In addition, the coolant chamber 440 communicates with the coolant outlet 214 and the coolant inlet 216 so that the coolant is filled, so that the coolant is always filled in the coolant chamber 440. do.

In addition, the heat exchange tube 500 is mounted inside the coolant chamber 440. The heat exchange tube 500 is to increase the temperature of the low temperature fuel gas, and is provided inside the coolant chamber 440 to exchange heat with the coolant filled inside the coolant chamber 440.

FIG. 6 is a perspective view illustrating an outer shape of a heat exchange tube that is a main component of a compressed natural gas regulator according to the present invention. Referring to FIGS. 5 and 6, the heat exchange tube is a predetermined inner diameter. It is formed by winding a plurality of times in the shape of a tube having a pipe 520, an input part 540, and an output part 560.

The input unit 540 and the output unit 560 are coupled to the fuel gas flow path formed in the main body 200 as the inlet and the outlet through which the fuel gas enters and exits, and the fuel gas introduced into the gas inlet 232 is transferred to the heat exchange tube. It may be discharged to the gas outlet 212 via the 500.

In addition, the input unit 540 and the output unit 560 may be formed with a screw thread around each of the outer circumference so as to be coupled to the fuel gas flow path opened to the upper surface inside the coolant chamber 440 of the main body 200, respectively. The nut may be provided such that the input unit 540 and the output unit 560 may be coupled to the fuel gas flow path by rotating the nut.

On the other hand, the pipe 520 is to guide the fuel gas, the input unit 540 and the output unit 560 are formed at both ends, respectively. In addition, the pipe part 520 is wound and formed in a circular shape having a predetermined diameter so that the heat exchange tube 500 may be located inside the coolant chamber 440. In addition, the pipe 520 is wound and formed a plurality of times in order to maximize the contact area with the coolant in the coolant chamber 440.

7 to 10 are cross-sectional views showing the flow path of the compressed natural gas regulator according to the present invention, in which the fuel gas flow path formed inside the main body 200 is shown in detail. As shown in the drawings, the fuel gas flow path is described in more detail as follows.

The gas inlet 232 is formed in the third surface 230 of the main body so as to open to the outer side of the main body. In addition, the gas inlet 232 extends in a state perpendicular to the third surface 230 to an inner side of the main body 200, and forms a first flow path 610.

The gas inlet 232 and the first flow path 610 are formed at a position far from the center of the main body 200 to the right side (see FIG. 7), and an inner end of the first flow path 610 is formed. It is formed in communication with the second flow path 620.

The second flow path 620 allows the inner side of the first flow path 610 and the cylindrical sleeve 270 to communicate with each other, and from the inner end of the first flow path 610 to one side of the cylindrical sleeve 270. It extends and guides the fuel gas to the inner chamber 290 inside the cylindrical sleeve 270 through the first passage 610 and the second passage 620.

In this case, since the cylindrical sleeve 270 is positioned at an approximately central portion of the main body 200, and the first channel 610 is formed at a position biased toward one side from an approximately central portion of the main body 200, the first channel ( The second channel 620 connecting the 610 and the cylindrical sleeve 270 is formed to be inclined as shown in FIG. 8.

Meanwhile, as illustrated in FIGS. 8 and 9, the outer chamber 260 is formed in communication with the third flow path 630. The third passage 630 extends from the outer chamber 260 to the third surface 230 on which the gas inlet 232 is formed, and is formed on the third chamber 260 and the third body of the main body 200. The outer surface 230 is formed to communicate. At this time, the opened portion of the third passage 630 exposed to the outside of the main body 200 is shielded by a stopper 632 to prevent the leakage of fuel gas.

An approximately central portion of the third passage 630 extends downward to form a fourth passage 640 which communicates with the third passage 630 and the coolant chamber 440. The open end of the fourth flow passage 640 opened into the coolant chamber 440 is coupled to the input portion 540 of the heat exchange tube 500. Therefore, the fuel gas guided by the fourth flow path 640 can be supplied to the heat exchange tube 500.

On the other hand, the output unit 560 of the heat exchange tube 500 is coupled to the fifth passage (650). The fifth flow path 650 guides the fuel gas heated up through the heat exchange tube 500 to the sixth flow path 660 and has an inner lower surface of the main body 200 corresponding to the upper portion of the output unit 560. Open at and extending vertically upwards.

The upper end of the fifth flow path 650 is formed in communication with the sixth flow path 660. The sixth flow path 660 is formed on the outer surface of the fourth surface 240 so as to vertically extend to the inner side of the fourth surface 240, and the extended end of the sixth flow path 660 is the seventh flow path 670. Is communicated with to guide the fuel gas.

An end portion of the opened sixth flow path 660 exposed to the fourth surface 240 is shielded by a stopper 662, and the sixth flow path 660 is slightly forward from the center of the main body 200. (As seen in FIG. 7) is formed at a somewhat distant position.

On the other hand, the seventh flow path 670 is to communicate with the sixth flow path 660 and the gas outlet 212, the fuel gas depressurized inside the main body 200 is discharged through the gas outlet 212 You will be guided. The seventh flow path 670 extends vertically inward from the gas outlet 212 of the first surface 210, and the extended end is formed to be connected to the sixth flow path 660 vertically.

As described above, the fuel gas flow path including the first to seventh flow paths 610, 620, 630, 640, 650, 660, 670 is connected to the heat exchange tube 500, and is formed to be in communication with the gas inlet 232 and the gas outlet 212. The fuel gas flowing through the inlet 232 may be discharged to the gas outlet 212 through the first to seventh flow paths 610, 620, 630, 640, 650, 660 and 670 and the heat exchange tube 500.

Hereinafter, the operation of the compressed natural gas regulator having the above configuration will be described with reference to the drawings.

First, a coolant based on water or oil that cools an engine or the like is introduced into the coolant chamber 440 through the coolant inlet 216 to fill the inside of the coolant chamber 440. The coolant inside the coolant chamber 440 again flows out of the main body 200 through the coolant outlet 214.

At this time, the coolant in the coolant chamber 440 is in contact with the heat exchange tube 500, and heat exchanges with the fuel gas flowing along the inside of the heat exchange tube 500 to raise the fuel gas.

Meanwhile, the flow of the fuel gas flowing along the flow path of the fuel gas will be described with reference to FIGS. 7 to 10.

Referring to FIG. 8, first, fuel gas stored in a compressed state in a tank (not shown) is introduced into the main body 200 through the gas inlet 232, and the introduced fuel gas is first flow path 610. Move along At the end of the first passage 610, the fuel gas moves downward along the second passage 620 communicating with the first passage 610. In addition, the fuel gas moving along the second passage 620 is introduced into the cylindrical sleeve 270 of the main body 200 in communication with the second passage 620.

As illustrated in FIG. 5, fuel gas introduced into the cylindrical sleeve 270 is introduced into the inner chamber 290 through the filter 288 and the through hole 286a, and inside the inner chamber 290. Fuel gas is introduced into the outer chamber 260 through a gap between the poppet 251a of the valve member 251 and the valve seat 255.

At this time, the fuel gas passes through a relatively narrow gap and expands as it moves from the inner chamber 290 of the high pressure to the outer chamber 260 of the low pressure, thereby rapidly decreasing the temperature to approximately -40 ° C.

Meanwhile, the fuel gas supplied to the outer chamber 260 moves upward as shown in FIG. 9 and is supplied to the third flow path 630 communicating with the outer chamber 260. The fuel gas supplied to the third passage 630 moves along the third passage 630 and is led to a fourth passage 640 extending downwardly in communication with the third passage 630. Since the fourth channel 640 is connected to the input unit 540 of the heat exchange tube 500, the fuel gas of the fourth channel 640 flows into the heat exchange tube 500.

The fuel gas inside the heat exchange tube 500 exchanges heat with the coolant filled inside the coolant chamber 440. That is, the fuel gas inside the heat exchange tube 500 is indirectly heated by the relatively high coolant to increase the temperature.

As such, while flowing along the pipe portion 520 of the wound heat exchange tube 500, the fuel gas is constantly in heat exchange with the coolant, and thus the temperature is increased. As illustrated in FIG. 10, the output unit 560 is shown. Inflow to the fifth flow path 650 through the ().

The fuel gas flowing into the fifth flow path 650 moves upward along the fifth flow path 650 and flows into the sixth flow path 660 communicating with the fifth flow path 650. Since the sixth flow path 660 extends from the outside of the main body 200 to the center direction, the fuel gas moves along the sixth flow path 660 toward the center portion.

As shown in FIG. 7, an end portion of the sixth flow passage 660 is connected to a seventh flow passage 670, and the seventh flow passage 670 is a gas outlet exposed to the outside of the main body 200. In communication with 212, the fuel gas moving along the sixth flow path 660 flows into the seventh flow path 670 and is discharged through the gas outlet 212.

Meanwhile, as shown in FIG. 5, the seventh flow path 670 has a guide tube 672 for guiding the discharge of the fuel gas. At this time, in order to prevent the fuel gas discharged from the guide tube 672 directly into the orifice 674, the open end of the guide tube 672 may be located outside the orifice 674. It is composed.

When the pressure of the fuel gas discharged by the guide tube 672 becomes relatively low, such pressure is transmitted to the orifice 674, so that the inside of the space in which the diaphragm 362 is provided is also relatively low pressure. The diaphragm 362 is moved slightly downward by the elasticity of the spring 324. As a result, the gap between the valve member 251 and the valve seat 255 is increased, and the flow rate of the fuel gas is increased, thereby increasing the pressure of the fuel gas discharged to the gas outlet 212. .

When the pressure of the fuel gas rises, such pressure is transmitted to the orifice 674 so that the diaphragm 362 overcomes the elastic force of the spring 324 and moves upward, thereby moving the valve member 251 and the valve seat. The gap between 255 becomes narrow again. Accordingly, the pressure of the fuel gas discharged from the gas outlet 212 is finally lowered.

Through this process, the output gas pressure can be balanced.

The scope of the present invention is not limited to the above embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

In the compressed natural gas regulator according to the present invention as described in detail above, the fuel gas is heated by relatively heat exchanged with the coolant filled in the coolant chamber while the relatively low temperature fuel gas is passed through the heat exchange tube. The pressure is reduced while passing through the valve assembly.

At this time, the fuel gas is relatively high temperature is generated at low temperatures, it is possible to solve the problems such as ignition and valve clogging, there is an effect that the overall performance is improved.

In addition, since a separate device for heat exchange does not need to be provided on the system, the system becomes concise as a whole. As a result, a reduction in manufacturing cost and a reduction in labor can be expected.

Claims (11)

delete A body forming an appearance; A fuel gas flow path formed inside the main body and forming a passage through which fuel gas flows; A valve assembly provided on the fuel gas flow path and configured to control a flow rate of the fuel gas; A diaphragm means provided inside the main body and controlling the operation of the valve assembly; A coolant chamber formed inside the main body and into which the coolant of the engine flows in and out; A compression heat exchange tube accommodated inside the coolant chamber, the heat exchange tube being connected to both ends of the fuel gas flow path and forming a passage of fuel gas so that the fuel gas can be discharged after heat exchange while passing through the inside of the coolant chamber. Natural gas regulator. The method of claim 2, The valve assembly, A valve member inserted into the main body and having a poppet formed at a lower end thereof; A valve spring disposed on an upper portion of the valve member to provide elasticity to the valve member; An upper fixture coupled to an upper portion of the valve member to restrain upward movement of the valve spring; A lower fixture formed to penetrate the valve member and supporting the valve spring from below; Compressed natural gas regulator that is provided on one side, the valve seat to form a gap with the poppet to form a flow path of fuel gas; The method of claim 3, wherein Compressed natural gas regulator, characterized in that the upper portion of the valve assembly is inserted into the lower side of the diaphragm fixture provided on the lower side of the diaphragm means. The method of claim 3, wherein The lower fixture is fixed to the inside of the main body, characterized in that the natural gas guides the movement of the valve member. The method of claim 3, wherein Compressed natural gas regulator, characterized in that the valve bushing coupled to one side of the main body corresponding to the lower side of the valve member to form an inner chamber for storing the fuel gas. The method of claim 3, wherein The valve bushing is mounted to the lower side of the main body, the valve bushing, A gripping portion held for voting; A coupling part formed on an upper part of the grip part and screwed to one side of the main body; Compressed natural gas regulator characterized in that it comprises a; extends upwardly so that the inside is hollow on the upper portion of the coupling portion, the periphery is formed through the passage through which the fuel gas enters and exits. delete The method of claim 2, The heat exchange tube, An input part coupled to the fuel gas flow path through which the fuel gas flows; An output unit coupled to the fuel gas flow path through which the fuel gas flows; Compressed natural gas regulator comprising a; pipe portion for guiding the fuel gas is wound a plurality of times so that the coolant and the fuel gas heat exchange. The method of claim 9, The heat exchange tube is compressed natural gas regulator, characterized in that for guiding the fuel gas in a reduced pressure state through the valve assembly. The method according to any one of claims 2 to 7, and 9 and 10, In the fuel gas flow path, First and second passages communicating from a gas inlet through which fuel gas is introduced to an inner chamber provided by the valve assembly; Third and fourth flow passages communicating from the outer chamber provided by the valve assembly to the heat exchange tube; Compressed natural gas regulator characterized in that it comprises a fifth to seventh passage communicating from the heat exchange tube to the gas outlet through which the fuel gas is discharged.

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