WO2023158057A1

WO2023158057A1 - High-efficiency fluid compression apparatus

Info

Publication number: WO2023158057A1
Application number: PCT/KR2022/017494
Authority: WO
Inventors: 류광현
Original assignee: 지에이치피 시스템 주식회사
Priority date: 2022-02-16
Filing date: 2022-11-09
Publication date: 2023-08-24
Also published as: KR102405274B1

Abstract

The present invention relates to a high-efficiency fluid compression apparatus usable for compressing, at high pressure, various gas-state fluids, such as hydrogen gas, or liquid-state fluids, the high-efficiency fluid compression apparatus comprising: a drive compressor which operates by means of a working fluid; a first compressor in which a first rodless piston dividing an inner space of a first cylinder is installed such that, by means of a pressurization reaction occurring at one side of the drive compressor, a first incompressible fluid raises the first rodless piston, thereby enabling a fluid which has been supplied into the inner space of the first cylinder to be compressed and discharged to a temporary storage tank; and a second compressor in which a second rodless piston dividing an inner space of a second cylinder is installed such that, by means of a suction reaction occurring at the other side of the drive compressor, a second incompressible fluid is discharged so as to lower the second rodless piston, thereby enabling a new batch of the fluid to flow into the inner space of the second cylinder from a supply tank, wherein the high-efficiency fluid compression apparatus comprises a primary compression circuit in which, of the first compressor and the second compressor, any one carries out a compression stroke, and the other one carries out a suction stroke.

Description

High Efficiency Fluid Compression Device

The present invention relates to a high-efficiency fluid compression device that can be used to compress various gaseous or liquid state fluids, including hydrogen gas, at high pressure.

Various liquids used as fuel to obtain energy are transported and stored in a state of high pressure and used in various demand places.

There are various types of compressors for compressing fluid, and they can be classified into positive displacement compressors and turbo compressors according to the compression method. Positive displacement compressors increase pressure through volume reduction, and turbo compressors use the kinetic energy of the fluid. It is a method of converting into pressure energy and compressing it.

A typical positive displacement compressor includes a reciprocating compressor, which compresses fluid by reciprocating motion of a piston. Other types include screw compressors and diaphragm compressors.

In particular, hydrogen is recognized as one of the alternative energies, and as an energy source for automobiles, fuel cells using hydrogen are expected to be the most desirable power source considering its efficiency and output.

A fuel cell is a system that generates electricity electrochemically by using oxygen in the air and hydrogen in the fuel, and can continuously generate electricity regardless of the capacity of the battery by supplying fuel and air from the outside.

That is, the fuel cell is an ideal power generation system with very high efficiency and little pollution because it directly converts the chemical energy of the fuel into electrical energy electrochemically within the cell without conversion into thermal energy.

In the present invention, in compressing a fluid such as hydrogen at a high pressure, the driving compressor is connected to the first compressor and the second compressor so that the hydrogen gas can be compressed in the first compressor and the second compressor through an incompressible fluid, resulting in high-quality compression. We want to be able to produce hydrogen.

In particular, the use of electrical elements is excluded in the first and second compressors where hydrogen compression is performed, and the repetitive supply and suction process of the incompressible fluid made in the driving compressor is also changed by physical contact between the piston rod and the operating rod. It is intended to provide a high-efficiency fluid compression device having stable and excellent compression efficiency characteristics by operating accurately without errors by making it happen.

A high-efficiency fluid compression device of the present invention for achieving the object as presented is a fluid compression device for compressing a fluid fuel to a high pressure, comprising: a drive compressor operated by hydraulic oil; A first rodless piston separating the inner space of the first cylinder is installed, and the first incompressible fluid flows into the inner space of the first cylinder while allowing the first rodless piston to rise by a pressurizing action generated at one side of the driving compressor. a first compressor for compressing the supplied fluid fuel and discharging it to a temporary storage tank; A second rodless piston separating the inner space of the second cylinder is installed, and the second incompressible fluid is discharged by the suction action generated on the other side of the driving compressor, and the second rodless piston is lowered to lower the first load in the supply tank. A second compressor that allows the new fluid fuel to flow into the inner space of the two cylinders, wherein one of the first compressor and the second compressor performs a compression stroke and the other performs a suction stroke. Characterized in that it includes a circuit.

Preferably, a cooling jacket is provided covering outer surfaces of the first compressor and the second compressor to cool heat generated in the inner space of the first cylinder and the inner space of the second cylinder.

Preferably, the primary compressed fluid fuel stored in the temporary storage tank is compressed to a higher pressure through a secondary compression circuit, the secondary compression circuit comprising: a secondary drive compressor operated by hydraulic oil; The 1-1 rodless piston separating the inner space of the 1-1 cylinder is installed, and the 1-1 incompressible fluid moves through the 1-1 rodless piston by the pressurized action generated from one side of the secondary driving compressor. a 1-1 compressor for compressing and discharging the primary compressed fluid fuel supplied to the inner space of the 1-1 cylinder while rising; The 2-1 rodless piston separating the inner space of the 2-1 cylinder is installed, and the 2-1 incompressible fluid is discharged by the suction action generated on the other side of the secondary driving compressor, and the 2-1 rodless piston is installed. and a 2-1 compressor for allowing the primary compressed fluid fuel to flow from the temporary storage tank into the inner space of the 2-1 cylinder by lowering the piston.

Preferably, the driving compressor has an operating space formed to pass through from side to side, and the operating space includes a cylinder body composed of a hydraulic oil supply chamber at the center and an incompressible fluid chamber at the left and right edges; A piston installed in the operating space and composed of a piston head positioned in the hydraulic oil supply chamber and a piston rod projecting left and right of the piston head and positioned in the incompressible fluid chamber; A housing coupled to both left and right ends of the cylinder body and an operating rod penetrating the housing and disposed coaxially with the piston, one end of the operating rod penetrates the cylinder body and enters the incompressible fluid chamber. and a pair of direction change detectors at the other end of the operating rod protruding outward from the housing; A pair of switching valves provided one by one on the outside of the pair of direction change detectors to allow hydraulic pressure to be applied to a signal hydraulic line when the operating rod contacts the other end of the operating rod when the operating rod moves outward; and a hydraulic oil flow control valve connected to the pair of switching valves and the signal hydraulic line and operated to change the flow direction of hydraulic oil in the hydraulic oil supply chamber when the switching valve on one side is operated.

Preferably, the operating rod is formed to protrude left and right to have a smaller outer diameter than the outer diameter of the operating head based on the operating head, and one or more O-rings are coupled to an outer circumferential surface of the operating head.

Preferably, the housing has an operating head chamber in which the operating head can be inserted and moved at one end side, and a seal installation chamber divided from the operating head chamber and a partition wall is formed at the other end side, and the operating rod is formed at the center of the partition wall. It is characterized in that a through hole is formed through which the diaphragm passes, and a hydraulic port capable of supplying hydraulic pressure to the operating head chamber adjacent to the bulkhead is formed.

Preferably, it is characterized in that a constant hydraulic pressure is always applied through the hydraulic port.

The high-efficiency fluid compression device according to the present invention has the effect of being very efficient in compressing and storing gaseous fluid fuel, such as hydrogen, at high pressure.

That is, the present invention has an effect that it is possible to produce a high-purity high-pressure compressed fluid fuel by reliably preventing a problem in which various impurities are mixed in a fluid fuel such as hydrogen gas during a high-pressure compression process.

In addition, the present invention allows the incompressible fluid to be discharged to one side while moving left and right reciprocally by working oil in the driving compressor, so that hydrogen gas is compressed in either the first compressor or the second compressor, and the incompressible fluid is discharged to the other side in the first compressor. While sucking in either the compressor or the second compressor, hydrogen gas is introduced into the compressor, and the direction of the piston moved by the hydraulic oil in the driving compressor is changed through physical contact between the piston rod and the operating rod to prevent malfunction. It has the effect of preventing safety accidents such as explosions by excluding the use of electric sensors.

1 is a conceptual diagram of a compressor without a piston according to the prior art.

2 is a conceptual diagram of a high-efficiency fluid compression device according to the present invention.

Figure 3 is an enlarged view of the cylinder body in Figure 2;

Figure 4 is an enlarged view of the direction change sensor in Figure 2;

5 is an enlarged view of a first compressor or a second compressor;

6 is a configuration diagram of a high-efficiency fluid compression device composed of a primary compression circuit and a secondary compression circuit.

7 is an example of operation when the piston moves to the right;

8 is an operation example when the piston moves to the left;

Hereinafter, a more detailed description of the high-efficiency fluid compression device according to the present invention will be given with reference to the accompanying drawings. However, the presented drawings and detailed description thereof are to describe one possible example according to the technical idea of the present invention, and the scope of technical protection of the present invention is not limited thereto.

As shown, the high-efficiency fluid compression device of the present invention can be used to compress various fluids, that is, liquid or gaseous fluids, to high pressures, and in particular, to commercially sell gaseous fluid fuels such as hydrogen gas at high pressures. It is a technology necessary to build infrastructure for storage or transportation.

In a specific embodiment of the present invention, a case of compressing hydrogen gas to a high pressure so that it can be used commercially is presented as an example, but it is pointed out that this is only one practical example.

On the other hand, the high-efficiency fluid compression device of the present invention can be provided as a single-stage or multi-stage fluid compression device according to the demand of the customer, and thus basically includes a primary compression circuit, and in the case of a multi-stage compression device, a secondary compression circuit, A third compression circuit may be added.

First, as a first embodiment of the present invention, a first-stage fluid compression device including only a primary compression circuit will be described.

Components of the high-efficiency fluid compression device of the present application including the primary compression circuit include a driving compressor (C), a first compressor (C1), and a second compressor (C2), and the driving compressor (C) is operated by hydraulic oil. And, the first compressor (C1) is connected to one side of the driving compressor (C), and the second compressor (C2) is connected to the other side of the driving compressor (C). Substantial hydrogen gas compression is performed in the first compressor (C1) and the second compressor (C2), a compression stroke is performed in one of the first compressor (C1) and the second compressor (C2), and suction is performed in the other compressor. As the stroke is performed, the first compressor C1 and the second compressor C2 alternately compress hydrogen to a high pressure.

The driving compressor (C) will be described in more detail.

The driving compressor (C) includes a cylinder body 100, a piston 200, a direction change detector 300, a switching valve 400, and a hydraulic oil flow control valve 500.

The cylinder body 100 penetrates left and right along the center line to form an operating space 110, and the operating space 110 includes a hydraulic oil supply chamber 110a at the center and an incompressible fluid chamber 110b at the left and right edges. In the hydraulic oil supply chamber 110a, hydraulic oil for forcibly moving the piston 200 left and right is supplied and discharged, and the incompressible fluid chamber 110b is filled with a predetermined amount of incompressible fluid. Meanwhile, the cylinder body 100 is manufactured and assembled into a plurality of divided parts in consideration of processing and assembly characteristics.

In the case of this embodiment, the cylinder body 100 is composed of a central center body 101 and side bodies 102 coupled to both left and right ends of the center body 101, and the center body 101 is a hollow body that penetrates left and right. And the inner space of the center body 101 becomes the working oil supply chamber 110a. Side bodies 102 are coupled to both left and right ends of the center body 101 one by one, and are fastened to the center body 101 through a flange formed at one end of the side body 102, and coaxial with the center body 101. As a result, an empty inner space is formed even inside the side body 102 to a predetermined depth. The inner space formed in the side body 102 becomes an incompressible fluid chamber 110b, and the inner diameter of the incompressible fluid chamber 110b is smaller than the inner diameter of the hydraulic oil supply chamber 110a of the center body 101. At the outer end of the body 102, an operation rod insertion hole 103 penetrating to the outside is formed.

A piston 200 is installed inside the cylinder body 100, the piston 200 is composed of a piston head 210 and a piston rod 220, and one or more O-rings O are installed on the piston head 210 . The piston head 210 is located in the hydraulic oil supply chamber 110a, and the piston rod 220 protrudes to the left and right of the piston head 210 and is installed in a state in which it is inserted into the non-compressible fluid chamber 110b.

The hydraulic oil supply chamber 110a is spatially separated by the piston head 210, so that one side becomes the first hydraulic oil supply chamber 110a-1 and the other side becomes the second hydraulic oil supply chamber 110a-2. For example, when hydraulic oil is supplied to the first hydraulic oil supply chamber 110a-1, the piston 200 moves toward the second hydraulic oil supply chamber 110a-2, and at this time, the hydraulic oil in the second hydraulic oil supply chamber 110a-2 is discharged to the outside. do.

Then, when the hydraulic oil is supplied again to the second hydraulic oil supply chamber 110a-2, the piston 200 moves toward the first hydraulic oil supply chamber 110a-1, and at this time, the hydraulic oil in the first hydraulic oil supply chamber 110a-1 discharged to the outside

More preferably, a sealing block 120 is installed between the connection points of the center body 101 and the side body 102 to increase sealing performance, and the piston rod 220 passes through the center of the sealing block 120, , The O-ring (O) is installed along the outer circumferential surface of the sealing block 120, and the sealing seal (S) is installed on the inner diameter surface of the sealing block 120 and the inner diameter surface of the incompressible fluid chamber 110b to be in contact with the piston rod 220. This prevents the hydraulic oil and incompressible fluid from mixing with each other.

A direction change sensor 300 is coupled to each end of the side body 102 constituting the cylinder body 100, and the direction change sensor 300 includes a housing 310 and an operating rod 320. An operating rod 320 is disposed coaxially with the piston 200 while penetrating the housing 310 constituting the direction change detector 300 from side to side. In particular, the operating rod 320 is shaped like a long rod connected to one another, and the operating head 320a is formed approximately in the middle so that the operating rod protrudes to the left and right of the operating head 320a to have a smaller outer diameter than the outer diameter of the operating head. 320 is provided. In addition, one or more O-rings (O) are coupled to the outer circumferential surface of the operating head (320a) to function as a piston.

One end of the operating rod 320 is installed to enter the incompressible fluid chamber 110b based on the operating head 320a, and the other end of the operating rod 320 is installed to protrude outward from the housing 310.

More specifically, the operating rod 320 is installed while penetrating the housing 310, and the operating head 320a is inserted into one end side of the housing 310 coupled to the side body 102 to move the operating head chamber ( 311) is formed to a predetermined depth, and a seal installation chamber 313 divided into an operating head chamber 311 and a partition wall 312 is formed at the other end side of the housing 310. A predetermined airtight seal (S) is installed in the seal installation chamber 313 to prevent incompressible fluid from leaking through the operating rod 320.

In addition, a through hole through which the operating rod 320 passes is formed at the center of the partition wall 312 so that the operating rod 320 can move left and right. In addition, it is preferable to form a hydraulic port 314 for supplying hydraulic pressure to the operating head chamber 311 adjacent to the bulkhead 312 . Through the hydraulic port 314, hydraulic fluid at a predetermined pressure is supplied to the operating head chamber 311 to balance the pressure formed in the incompressible fluid chamber 110b of the cylinder body 100.

The fact that the constant pressure set through each hydraulic port 314 of the pair of direction change detectors 300 is always applied will be described later through specific operation examples.

A pair of switching valves 400 are provided while leaving a predetermined distance to the outside of the direction change detector 300 coupled to the outer end of the side body 102, respectively. Each switching valve 400 presses the input end 410 of the switching valve 400 with the end of the operating rod 320 when the operating rod 320 of each facing direction change sensor 300 is forcibly moved to the outside. And, accordingly, the hydraulic pressure is operated to act on the signal hydraulic line (L1) connected to the switching valve 400.

In addition, a pair of switching valves 400 and a hydraulic oil flow control valve 500 connected to a signal hydraulic line L1 are provided. It serves to control the flow path so that the flow direction of hydraulic oil in the first hydraulic oil supply chamber 110a-1 and the second hydraulic oil supply chamber 110a-2 is changed.

For example, when hydraulic oil is supplied to the second hydraulic oil supply chamber 110a-2, the piston 200 moves toward the first hydraulic oil supply chamber 110a-1 by a predetermined distance. While the entire piston 200 moves, the piston rod 220 presses one end of the operating rod 320 that has entered the first incompressible fluid chamber 110b-1, and the other end of the operating rod 320 presses on the housing 310. ) While further protruding outward, the input end 410 of the first switching valve 400a is pressed so that the hydraulic oil supply path is changed in the hydraulic oil flow control valve 500 while hydraulic pressure is supplied to the signal hydraulic line L1.

Meanwhile, during operation of the device, hydraulic pressure is supplied through the hydraulic port 314 of each direction change sensor 300 so that the operating head 320a receives force toward the inside. For example, when hydraulic oil is supplied to the second hydraulic oil supply chamber 110a-2, hydraulic pressure is applied through the hydraulic port 314 in the second direction switching sensor 300b, so the operating rod 320 is not pushed outward. On the contrary, in the first direction switching sensor 400a, the piston 200 is moved so that the working oil in the first working oil supply chamber 110a-1 is discharged, and the incompressibility of the first incompressible fluid chamber 110b-1 The fluid is also discharged, and during the process, the hydraulic pressure of a predetermined pressure is applied through the hydraulic port 314 so that the operating rod 320 does not retreat outward until the piston rod 220 contacts the operating rod 320. At this point, the first switching valve 400a is operated. And the hydraulic port 314 formed in the direction change sensor 300 is connected to the accumulator 50, so that when the piston rod 220 pushes the operating rod 320, the hydraulic oil of the operating head chamber 311 is transferred to the accumulator. 50, and when the piston 200 moves in the opposite direction, the hydraulic fluid introduced into the accumulator 50 is discharged again, so that hydraulic pressure is applied to the operating head chamber 311.

The hydraulic force applied to the operating head chamber 311 through the hydraulic port 314 of the direction change detector 300 is set so that an appropriate hydraulic pressure is applied in consideration of the pressure in the hydraulic oil supply chamber 110a inside the cylinder body 100. You can do it.

When the hydraulic oil flow control valve 500 is operated by the operation of the first switching valve 400a, the hydraulic oil is supplied to the first hydraulic oil supply chamber 110a-1, and the hydraulic oil of the second hydraulic oil supply chamber 110a-2 is discharged into the tank. A flow path is formed as much as possible.

When hydraulic oil flows into the first hydraulic oil supply chamber 110a-1, the piston 200 moves in the opposite direction, that is, to the second hydraulic oil supply chamber 110a-2, so that the piston rod 220 moves to the second direction change detector 300b. One end of the operating rod 320 is pressed, and the other end of the operating rod 320 further protrudes to the outside of the housing 310 and presses the input end 410 of the second switching valve 400b to press the hydraulic line for the second signal ( By allowing hydraulic pressure to act on L2), the hydraulic oil flow control valve 500 is operated to change the flow path. That is, the hydraulic oil flows into the second hydraulic oil supply chamber 110a-2, and the hydraulic oil remaining in the first hydraulic oil supply chamber 110a-1 is controlled to be discharged to the tank.

The incompressible fluid is discharged or sucked from the incompressible fluid chamber 110b of the cylinder body 100 by the left and right repetitive movement of the piston 200 as described above to fill the incompressible fluid chamber.

As described above, in the drive compressor C used in the present invention, while the piston 200 is moved left and right by working oil, the operation of pressurizing and discharging the incompressible fluid on one side and sucking the incompressible fluid on the other side is repeated.

It can be summarized that the driving compressor (C) is for pressurizing and supplying an incompressible fluid so that hydrogen gas can be compressed in the first compressor (C1) and the second compressor (C2).

The first compressor C1 and the second compressor C2 connected to the drive compressor C will be described in more detail.

The first compressor (C1) and the second compressor (C2) have the same components, the first compressor (C1) is connected to the first incompressible fluid chamber (110b-1) and the flow path, the second compressor (C2) is interconnected with the second incompressible fluid chamber 110b-2 so that the incompressible fluid can move.

The first compressor (C1) is preferably arranged in the vertical direction, and the first cylinder (10) of a predetermined height is coupled upright on the bottom plate (BP), and the inside of the first cylinder (10) has an internal space A first rodless piston (P1) separating up and down is installed.

The first incompressible fluid chamber 110b-1 and the flow path are connected through the bottom plate BP so that the first incompressible fluid is supplied to the inner space of the first cylinder 10. Meanwhile, an outlet (V) of hydrogen gas to be compressed is provided at the upper end of the first cylinder 10 .

The outlet inlet (V) may be separated so that the inlet and outlet are formed independently, and when compressed through one outlet inlet (V), the compressed hydrogen can be discharged through the compression line (1), and inhaled on the contrary. At this time, hydrogen gas may be introduced into the first cylinder 10 through the suction line 2 .

In the case of this embodiment, one outlet inlet (V) is provided on the upper side of the first cylinder (10), and check valves (CV) are installed in the compression line (1) and the suction line (2), and the first The check valve CV1 is opened during compression and the second check valve CV2 is closed. When hydrogen gas is sucked into the first cylinder 10, the second check valve CV2 is opened and the first check valve CV1 is operated to close.

On the other hand, by providing a cooling jacket (J) on the outer surface of the first compressor (C1), the heat generated when hydrogen gas is compressed inside the first cylinder (10) is absorbed by heat exchange to perform a cooling action, resulting in overheating. make it possible to solve the problem. The cooling jacket (J) allows a refrigerant such as water to circulate to effectively absorb heat generated inside the first cylinder (10).

The second compressor (C2) is made of the same components as the first compressor (C1), the second rodless piston (P2) separating the inner space of the second cylinder (20) is installed, through the bottom plate (BP) It is connected to the second incompressible fluid chamber (110b-2), and an outflow inlet (V) is provided on the upper side.

On the other hand, as elements constituting the present invention, a temporary storage tank (T1) and a supply tank (T2) must be provided, and the temporary storage tank (T1) is the compression line ( 1), so that hydrogen gas compressed to high pressure through the compression stroke can be stored. The supply tank T2 is a necessary element for supplying hydrogen gas to be compressed to the first compressor C1 or the second compressor C2 through the suction line 2.

The first compressor (C1) and the second compressor (C2) operate simultaneously, and one compression stroke is performed and the other is a suction stroke, so that hydrogen gas can be compressed at high pressure quickly and efficiently.

On the other hand, the temporary storage tank (T1) is provided with a gas outlet (V1) for discharging the primarily compressed hydrogen gas to the outside.

The driving compressor (C), the first compressor (C1), and the second compressor (C2) are connected to each other and interlock with the operation of the driving compressor (C), so that the first compressor (C1) and the second compressor (C2) operate at the same time, , When the compression stroke is performed in the first compressor (C1), the first incompressible fluid accommodated in the first incompressible fluid chamber (110b-1) of the driving compressor (C) is discharged by pressurization, and the inside of the first cylinder (10) As it flows into, it is operated to raise the first rodless piston (P1), compresses the hydrogen gas that has flowed into the inner space of the first cylinder (10), and exports it to the temporary storage tank (T1).

At the same time, a suction stroke is performed in the second compressor (C2), and the second incompressible fluid accommodated in the second cylinder (20) is suctioned from the second incompressible fluid chamber (110b-2) of the drive compressor (C1). By the action, the second rodless piston (P2) descends, and as a result, the internal pressure of the second cylinder (20) drops, and new hydrogen gas from the supply tank (T2) is introduced into the inner space of the second cylinder (20).

As described above, it can be seen that hydrogen gas can be compressed to a high pressure through the primary compression circuit, and when compression to a higher pressure is required, an additional secondary compression circuit is connected to reproduce the primary compressed hydrogen gas. to be able to compress it.

The secondary compression circuit includes a secondary driving compressor (C-1), a 1-1 compressor (C1-1), and a 2-1 compressor (C2-1), and the 1-1 compressor (C1-1) ) The first rodless piston (P1-1) is installed in the inner space of the 1-1 cylinder (10-1) by the pressurization action generated from one side of the secondary driving compressor (C-1). -1 The incompressible fluid causes the 1-1 rodless piston (P1-1) to rise so that the primary compressed fluid fuel supplied to the inner space of the 1-1 cylinder (10-1), that is, the primary compressed hydrogen gas, is further supplied. It is compressed and discharged to the storage tank (T3).

The 2-1 compressor (C2-1) has a 2-1 cylinder (20-1) and a 2-1 rodless piston (P2-1) is installed to separate the internal space, and the secondary driving compressor (C The 2-1 cylinder 20 in the temporary storage tank T1 by lowering the 2-1 rodless piston P2-1 while the 2-1 incompressible fluid is discharged by the suction action generated on the other side of -1). -1) Allow the primary compressed fluid fuel to flow into the inner space.

Other components are the same as the primary compression circuit, so further detailed descriptions will be omitted.

The compressed hydrogen gas stored in the storage tank is stored at a higher pressure than the temporary storage tank. The hydrogen gas stored in the temporary storage tank through the primary compression circuit is approximately 500 bar, and is stored in the storage tank through the secondary compression circuit. The hydrogen gas to be compressed can be stored at about 1000 bar.

Of course, a tertiary compression circuit may be further configured to compress hydrogen gas at a higher pressure.

On the other hand, the incompressible fluid referred to in the present invention may use water or an ionic liquid, and the ionic liquid includes an Alkyl-imidazolium system. The ionic liquid is a material composed of organic cations and organic/inorganic anions, and It maintains a liquid state below 100℃, has a high heat resistance temperature, and is characterized by being non-flammable. Also, ionic liquids are characterized by very low solubility in water.

Ionic liquids are used as eco-friendly clean solvents, electrolytes for secondary batteries, and electrically conductive materials, but the manufacturing process is complicated and difficult, and the price is very high.

Therefore, in the present invention, water or ionic liquid can be selected as the incompressible fluid, and water and ionic liquid are mixed in an appropriate amount, for example, 50%, to reduce the cost of supplementing the consumable incompressible fluid. present.

That is, 50% of the total volume filling the incompressible fluid chamber, the inner space of the cylinder of the first or second compressor, and the flow path is filled with water and the remaining 50% is filled with ionic liquid. Use as an incompressible fluid. In particular, since ionic liquids have extremely low solubility in water, there is no great difficulty in using both together.

Meanwhile, a balloon having excellent elasticity is installed inside the first compressor or the second compressor to inhale and compress hydrogen gas so that the hydrogen gas can be completely separated spatially inside the cylinder. The upper end of the balloon is tightly connected to the inlet and outlet, and the lower end of the balloon is constrained using the upper end of the rodless piston and a magnet so that the balloon can also be contracted or expanded according to the elevation of the rodless piston.

As the rodless piston descends, the balloon also expands, and at this time, hydrogen gas flows into the balloon, and then, when the rodless piston rises, the balloon also contracts, compressing and discharging the hydrogen gas inside it.

In this way, when the balloon is applied to the first or second compressor, it is possible to fundamentally exclude the contact between the hydrogen gas and the incompressible fluid that operates the rodless piston, so that more pure hydrogen gas can be compressed at high pressure.

As described above, the high-efficiency fluid compression device according to the present invention can be very useful when compressing a fluid such as hydrogen gas at a high pressure. In particular, in the case of the present invention, operation control of the driving compressor, the first compressor, and the second compressor In order to exclude elements using electricity such as solenoid valves, hydraulic pressure is used to drive the driving compressor, and the direction of the piston of the driving compressor is changed so that the compression and suction strokes can be alternately performed in the first and second compressors. The controlling direction change sensor also has the advantage of preventing safety accidents such as explosion accidents by allowing the hydraulic oil supply path to be changed by physical contact between the piston rod and the operating rod.

The present invention is a technology that can be usefully used for the purpose of compressing a fluid such as hydrogen gas at a high pressure.

Claims

As a fluid compression device for compressing a fluid to a high pressure,

a drive compressor operated by hydraulic oil;

A first rodless piston separating the inner space of the first cylinder is installed, and the first incompressible fluid flows into the inner space of the first cylinder while allowing the first rodless piston to rise by a pressurizing action generated at one side of the driving compressor. a first compressor for compressing the supplied fluid and discharging it to a temporary storage tank;

A second rodless piston separating the inner space of the second cylinder is installed, and the second incompressible fluid is discharged by the suction action generated on the other side of the driving compressor, and the second rodless piston is lowered to lower the first load in the supply tank. A second compressor that allows the new fluid to flow into the inner space of the two cylinders;

The drive compressor,

An operating space is formed so as to pass through from side to side, and the operating space includes a cylinder body composed of a hydraulic oil supply chamber at the center and an incompressible fluid chamber at the left and right edges;

A piston installed in the operating space and composed of a piston head positioned in the hydraulic oil supply chamber and a piston rod projecting left and right of the piston head and positioned in the incompressible fluid chamber;

A housing coupled to both left and right ends of the cylinder body and an operating rod penetrating the housing and disposed coaxially with the piston, one end of the operating rod penetrates the cylinder body and enters the incompressible fluid chamber. and a pair of direction change detectors at the other end of the operating rod protruding outward from the housing;

A pair of switching valves provided one by one on the outside of the pair of direction change detectors to allow hydraulic pressure to be applied to a signal hydraulic line when the operating rod contacts the other end of the operating rod when the operating rod moves outward;

A hydraulic oil flow control valve connected to the pair of switching valves and the signal hydraulic line and operating so that the hydraulic oil flow direction in the hydraulic oil supply chamber is changed when the switching valve on one side is operated,

The operating rod is formed to protrude left and right to have a smaller outer diameter than the outer diameter of the operating head based on the operating head, and one or more O-rings are coupled to the outer circumferential surface of the operating head,

A high-efficiency fluid compression device comprising a primary compression circuit in which one of the first compressor and the second compressor performs a compression stroke and the other performs a suction stroke.
According to claim 1,

A high-efficiency fluid compression device, characterized in that a cooling jacket surrounding outer surfaces of the first compressor and the second compressor is provided to cool heat generated in the inner space of the first cylinder and the inner space of the second cylinder.
According to claim 2,

The primary compressed fluid stored in the temporary storage tank is compressed to a higher pressure through a secondary compression circuit, and the secondary compression circuit,

A secondary drive compressor operated by hydraulic oil;

The 1-1 rodless piston separating the inner space of the 1-1 cylinder is installed, and the 1-1 incompressible fluid moves through the 1-1 rodless piston by the pressurized action generated from one side of the secondary driving compressor. a 1-1 compressor for compressing and discharging the primary compressed fluid supplied to the inner space of the 1-1 cylinder while rising;

The 2-1 rodless piston separating the inner space of the 2-1 cylinder is installed, and the 2-1 incompressible fluid is discharged by the suction action generated on the other side of the secondary driving compressor, and the 2-1 rodless piston is installed. A high-efficiency fluid compression device comprising a; 2-1 compressor that causes the piston to descend to allow the primary compressed fluid to flow from the temporary storage tank into the inner space of the 2-1 cylinder.
According to any one of claims 1 to 3,

the housing,

An operating head chamber in which the operating head can be inserted and moved is formed at one end side, and a seal installation chamber separated from the operating head chamber and a partition wall is formed at the other end side, and a through hole through which the operating rod passes is formed at the center of the partition wall. and a hydraulic port capable of supplying hydraulic pressure to the operating head chamber adjacent to the bulkhead is formed.
According to claim 4,

A high-efficiency fluid compression device characterized in that a constant hydraulic pressure is always applied through the hydraulic port.