Exhaust valve liquid separation and liquid real-time replenishment mechanism suitable for ionic liquid compressors

Abstract

The present invention discloses an exhaust valve liquid separation and real-time liquid replenishment mechanism suitable for an ionic liquid compressor. The present invention improves the exhaust valve of the ionic liquid compressor, and a circle of exhaust valve orifices inclined in the same direction are opened on the exhaust valve seat, which can form a circular rotating flow when the gas and liquid phases flow out. A circle of downwardly inclined exhaust valve plate retaining edges is provided on the outer edge of the exhaust valve plate. The vortex formed by the exhaust valve orifice and the exhaust valve plate retaining edges enable the outflowing ionic liquid to be efficiently and quickly separated from the gas at the outlet, and does not continue to flow with the gas in the exhaust pipe, thereby reducing the resistance loss in the pipe. At the same time, the ionic liquid collected in the first chamber can be introduced into the cooling structure for cooling, and then the ionic liquid is replenished to the cylinder. Therefore, the present invention can ensure that the ionic liquid lost in the cylinder is replenished in a timely manner, and the ionic liquid entering the cylinder after being cooled by the cooling structure can reduce the high temperature during the cylinder compression process.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors and relates to an exhaust valve liquid separation and liquid real-time replenishment mechanism suitable for an ionic liquid compressor. Background Art

[0002] Ionic liquid compressors, with their lack of wearing parts and high volumetric efficiency, are an ideal solution for hydrogen refueling stations operating above 70 MPa. Ionic liquid compressors possess outstanding performance due to the presence of a liquid piston. The ionic liquid coats the solid piston and reciprocates with it, causing the gas in the compression chamber to cyclically expand, compress, and discharge. During this process, the ionic liquid acts as a seal, lubricates, and enhances heat exchange. However, at the end of exhaust, due to the liquid's flow-with characteristics, approximately 30% of the ionic liquid by volume is discharged along with the gas flow. Large amounts of liquid carryover can cause liquid blockage at the exhaust valve. Furthermore, as the ionic liquid in the cylinder gradually decreases, insufficient exhaust pressure can result. In severe cases, seal failure can occur, leading to unstable compression in the compression chamber and malfunction. Therefore, timely replenishment of an appropriate amount of ionic liquid is necessary. Summary of the Invention

[0003] In order to solve the problem of exhaust channel blockage caused by the large amount of ionic liquid at the exhaust end of the ionic liquid compressor during operation, and the problem of unstable compression process caused by the loss of liquid ionic liquid in the compression chamber, the purpose of the present invention is to provide an exhaust valve liquid separation and liquid real-time replenishment mechanism suitable for ionic liquid compressors.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] An exhaust valve liquid separation and real-time liquid replenishment mechanism for an ionic liquid compressor includes a cooling structure and a cylinder. The inlet and exhaust ends of the cylinder are connected to a cylinder head. The cylinder head is provided with an exhaust valve cavity. An exhaust valve assembly is embedded in the exhaust valve cavity. The exhaust valve cavity is further provided with an exhaust valve cover for fixing the exhaust valve assembly in the exhaust valve cavity. A first chamber is enclosed between the exhaust valve assembly and the exhaust valve cover.

[0006] The exhaust valve assembly includes an exhaust valve seat, an exhaust valve disc, an exhaust valve lift limiter, an exhaust valve bolt, an elastic element and an exhaust valve guide ring. The exhaust valve seat is fixed in the exhaust valve cavity. The exhaust valve lift limiter, the exhaust valve guide ring and the exhaust valve seat are installed on the exhaust valve bolt from top to bottom. The exhaust valve lift limiter and the exhaust valve seat are fixedly connected to the exhaust valve bolt. The exhaust valve disc is sleeved on the outer ring of the exhaust valve guide ring and can automatically slide along the exhaust valve guide ring. An elastic element is provided between the exhaust valve disc and the exhaust valve lift limiter, and the elastic element can push the exhaust valve disc to press against the exhaust valve seat.

[0007] The exhaust valve seat is provided with a circle of exhaust valve orifices inclined in the same direction and capable of forming an annular rotating flow when the gas and liquid phases flow out. The lower end of the exhaust valve orifice is communicated with the bottom of the exhaust valve cavity, and the upper end of the exhaust valve orifice extends to the sealing surface between the exhaust valve seat and the exhaust valve disc. The outer edge of the exhaust valve disc is provided with a circle of downwardly inclined exhaust valve disc ribs.

[0008] The exhaust valve seat is provided with an exhaust valve drain hole at the bottom of the first chamber; the inlet of the cooling structure is connected to the exhaust valve drain hole through a drain pipe, a liquid-through-air blocking mechanism is provided on the passage between the inlet of the cooling structure and the exhaust valve drain hole, and the outlet of the cooling structure is connected to the cylinder through a liquid replenishing pipe;

[0009] An exhaust port is provided on the cylinder cover, one end of the exhaust port is communicated with the cylinder, and the other end of the exhaust port is communicated with the bottom of the exhaust valve chamber.

[0010] Preferably, the elastic element adopts an exhaust valve spring, and the top of the exhaust valve plate and the bottom of the exhaust valve lift limiter are both provided with grooves for the ends of the exhaust valve spring to be embedded. The upper and lower ends of the exhaust valve spring are respectively embedded in the grooves at the bottom of the exhaust valve lift limiter and the grooves at the top of the exhaust valve plate, and the exhaust valve spring is in a compressed state.

[0011] Preferably, the top flow-through portion of the inner cavity of the exhaust valve cover is provided with a downwardly folded exhaust valve cover inner concave corner.

[0012] Preferably, the diameter of the outer edge of the exhaust valve plate rib is larger than the diameter of the top flow-through portion of the exhaust valve cover inner cavity.

[0013] Preferably, the cylinder head 20 is provided with a fluid replenishing hole connected to the top of the cylinder cavity, and the outlet of the cooling structure is connected to the fluid replenishing hole 205 through a fluid replenishing pipe.

[0014] Preferably, a cylinder head drain hole is provided on the cylinder head, one end of the cylinder head drain hole is communicated with the lower end of the exhaust valve drain hole, and the other end of the cylinder head drain hole extends to the surface of the cylinder head and is communicated with the drain pipe.

[0015] Preferably, the exhaust valve seat is provided with a drain hole positioning boss at the lower end of the exhaust valve drain hole, and the cylinder head 20 is provided with a drain hole positioning groove for the drain hole positioning boss to be embedded in a position opposite to the drain hole positioning boss, and the drain hole positioning boss is embedded in the drain hole positioning groove.

[0016] Preferably, the exhaust valve seat adopts a stepped shaft structure, and the exhaust valve seat includes, from top to bottom, a first small diameter section, a large diameter section, and a second small diameter section; the exhaust valve orifice passes through the first small diameter section, the large diameter section, and the second small diameter section, and the diameters of the first small diameter section and the second small diameter section are both smaller than the diameter of the large diameter section; the lower end of the exhaust valve orifice is located at the lower end surface of the second small diameter section, and the upper end of the exhaust valve orifice is located at the upper end surface of the first small diameter section; the lower end surfaces of the exhaust valve disc and the exhaust valve guide ring abut against the upper end surface of the first small diameter section, and the lower end surface of the exhaust valve disc covers the upper end of the exhaust valve orifice;

[0017] A sinking cavity is provided at the bottom of the exhaust valve cavity, the second small diameter section is embedded in the sinking cavity, a distance is left between the lower end surface of the second small diameter section and the bottom of the sinking cavity, and the exhaust port is communicated with the bottom of the sinking cavity;

[0018] The lower end surface of the large diameter section abuts against the upper edge of the sinking cavity, the lower end surface of the exhaust valve cover abuts against the outer edge of the large diameter section, the exhaust valve cover and the large diameter section enclose the first chamber, and the first small diameter section, the exhaust valve plate and the exhaust valve lift limiter are all located in the first chamber;

[0019] The exhaust valve bolt, the exhaust valve seat, the exhaust valve plate, the exhaust valve lift limiter, the exhaust valve guide ring and the exhaust valve cover are coaxially arranged.

[0020] Preferably, the liquid-through and air-blocking mechanism adopts a liquid-through and air-blocking float mechanism, which includes a float, a baffle, a pulling rope and a gravity ball. The baffle is arranged at the upper port of the exhaust valve discharge hole, the float is arranged on the upper part of the baffle, the upper end of the pulling rope is connected to the baffle, and the lower end of the pulling rope is connected to the gravity ball. The gravity ball can pull the baffle to cover the upper port of the exhaust valve discharge hole through the pulling rope. The total weight of the gravity ball and the pulling rope is the same as the total weight of the float and the baffle.

[0021] Preferably, the liquid-passing and gas-blocking mechanism adopts a light detection mechanism, which includes a transparent tube section, a light emitter, a light receiver and an electromagnetic three-way valve. The transparent tube section is connected to the drainage pipe and serves as a part of the drainage pipe. The light emitter and the light receiver are respectively located on both sides of the transparent tube section. The light receiver can receive light emitted by the light emitter and passing through the transparent tube section; the electromagnetic three-way valve is provided with a liquid inlet, a liquid outlet and an exhaust port. The liquid inlet and the liquid outlet of the electromagnetic three-way valve are connected to the drainage pipe and are located downstream of the transparent tube section.

[0022] The light receiver is electrically connected to the electromagnetic three-way valve. The electromagnetic three-way valve can connect the liquid inlet and liquid outlet of the electromagnetic three-way valve and close the exhaust port according to the first detection signal of the light receiver. The electromagnetic three-way valve can open the liquid inlet of the electromagnetic three-way valve, close the liquid outlet, and open the exhaust port according to the second detection signal of the light receiver.

[0023] The first detection signal is a signal detected by the optical receiver when the transparent tube section is fully liquid-flowing;

[0024] The second detection signal is a signal detected by the optical receiver when a gas phase appears in the transparent tube segment.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the present invention, a circle of exhaust valve orifices is formed on the exhaust valve seat, inclined in the same direction and capable of forming a circular rotating flow when the gas and liquid phases flow out. Utilizing the swirling flow formed by the exhaust valve orifices and the exhaust valve plate retaining edge, the outflowing ionic liquid is efficiently and quickly separated from the gas at the outlet, preventing it from continuing to flow downstream with the gas, thereby reducing resistance losses in the pipeline. Simultaneously, a first chamber enclosed between the exhaust valve assembly and the exhaust valve cover can collect the separated ionic liquid, which can be introduced into a cooling structure for cooling and then replenished to the cylinder. Therefore, the present invention can ensure timely replenishment of ionic liquid lost in the cylinder. Furthermore, the ionic liquid cooled by the cooling structure and then entering the cylinder can reduce the high temperature during the cylinder compression process, making the compression process closer to isothermal compression and improving the efficiency of the compression process. The ionic liquid separated by the exhaust valve assembly is pushed by the high-pressure gas in the first chamber, passes through the cooling structure, and is then replenished into the compression chamber of the cylinder. Therefore, the present invention can more accurately control the amount of ionic liquid injected to be equal to the amount of ionic liquid discharged, that is, the initially injected ionic liquid can circulate in the compression chamber and the exhaust valve chamber, so there is no need to set up an additional liquid volume adjustment mechanism, and the problem of unstable compression process caused by inaccurate liquid replenishment is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic diagram of the appearance of the exhaust valve liquid separation and liquid real-time replenishment mechanism applicable to the ionic liquid compressor of the present invention.

[0028] Figure 2 It is a 1 / 4 cross-sectional view of the cylinder head portion of the present invention.

[0029] Figure 3 It is a 1 / 2 cross-sectional view of the cylinder head portion of the present invention.

[0030] Figure 4 It is a cross-sectional schematic diagram of the exhaust valve assembly of the present invention.

[0031] Figure 5 Schematic diagram of the exhaust valve seat of the present invention.

[0032] Figure 6 This is a detailed diagram showing the liquid-through and air-blocking float mechanism in Example 1 of the present invention.

[0033] Figure 7 This is a detailed diagram showing the light detection mechanism in Example 2 of the present invention.

[0034] In the figure: 10-cylinder, 20-cylinder head, 201-drain hole positioning groove, 202-cylinder head drain hole, 203-intake port, 204-exhaust port, 205-replenishing port, 30-intake valve assembly, 31-intake valve cover, 32-intake valve pressure valve flange, 40-exhaust valve assembly, 401-exhaust valve seat, 4011-exhaust valve port, 4012-exhaust valve drain hole, 4013-drain hole positioning boss, 4014-first small diameter section, 4015-large diameter section, 4016-second small diameter section, 402-exhaust valve plate, 4021-exhaust valve plate retaining edge, 403-exhaust valve lift limiter, 404-exhaust valve bolt, 405-exhaust valve spring, 4 06-exhaust valve guide ring, 41-exhaust valve cover, 411-inner concave corner of the exhaust valve cover, 412-exhaust valve cover air outlet channel, 413-exhaust pipeline, 42-exhaust valve pressure valve flange, 43-first chamber, 44-sinking cavity, 50-cooling structure, 501-drainage pipeline, 502-fluid supply pipeline, 60-liquid and air-blocking float mechanism, 601-float, 602-baffle, 603-pulling rope, 604-gravity ball, 70-light detection mechanism, 701-transparent pipe section, 702-light emitter, 703-light receiver, 704-electromagnetic three-way valve, 7041-liquid inlet, 7042-liquid outlet, 7043-exhaust port, 705-exhaust connecting pipeline. DETAILED DESCRIPTION

[0035] Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand the present application and implement the present application. Without violating the principles of the present application, the features of different embodiments may be combined to obtain new implementations, or certain features of certain embodiments may be substituted to obtain other preferred implementations.

[0036] See also Figure 1-Figure 3 The exhaust valve liquid separation and liquid real-time replenishment mechanism of the present invention is applicable to the ionic liquid compressor and mainly includes an exhaust valve assembly 40 with a gas-liquid separation function and an ionic liquid cooling structure 50; the top of the cylinder 10 of the ionic liquid compressor is fastened to the cylinder cover 20 by bolts, and the cylinder cover 20 is provided with an intake valve cavity and an exhaust valve cavity, and the intake valve cavity and the exhaust valve cavity are respectively embedded with an intake valve assembly 30 and an exhaust valve assembly 40.

[0037] See also Figure 3The cylinder head 20 has an air inlet 203 and an air outlet 204. The air inlet 203 is connected to the air inlet valve assembly 30. The gas sucked in by the compressor enters the air inlet valve cover 31 and then enters the interior of the cylinder 10 from the air inlet 203 after passing through the air inlet valve assembly 30. The air outlet 204 is connected to the air outlet valve assembly 40. The high-pressure gas compressed in the compressor enters the air outlet valve assembly 40 through the air outlet 204 and then enters the air outlet valve cover 41. The high-pressure gas passes through the air outlet passage 412 on the air outlet valve cover 41 and finally leaves the exhaust pipe 413.

[0038] Furthermore, an intake valve cover 31 is provided above the intake valve assembly 30, and the intake valve cover 31 is fixed to the cylinder head 20 by an intake valve pressure valve flange 32 and bolts, and the intake valve pressure valve flange 32 is used to press the intake valve cover 31 onto the intake valve assembly 30, so that the intake valve assembly 30 is fixed in the intake valve cavity. The intake valve assembly 30 and the intake valve cover 31 of the intake valve part of the present invention both adopt conventional structures, and the present invention does not make special limitations; an exhaust valve cover 41 is provided above the exhaust valve assembly 40, and the exhaust valve cover 41 is fixed to the cylinder head 20 by an exhaust valve pressure valve flange 42 and bolts, and the exhaust valve cover 41 is pressed onto the exhaust valve assembly 40 by the exhaust valve pressure valve flange 42, so that the exhaust valve assembly 40 is fixed in the exhaust valve cavity.

[0039] See also Figure 3 and Figure 4 The exhaust valve assembly 40 of the present invention has a gas-liquid separation function, which mainly includes an exhaust valve seat 401, an exhaust valve plate 402, an exhaust valve lift limiter 403, an exhaust valve bolt 404, an exhaust valve spring 405 and an exhaust valve guide ring 406;

[0040] Furthermore, the exhaust valve spring 405 is placed between the exhaust valve disc 402 and the groove of the exhaust valve lift limiter 403. The exhaust valve spring 405 is in a compressed state. Under normal conditions, the exhaust valve spring 405 pushes the exhaust valve disc 402 to press against the exhaust valve seat 401.

[0041] Furthermore, the outer edge of the exhaust valve plate 402 is provided with a downwardly inclined exhaust valve plate retaining edge 4021;

[0042] Furthermore, an exhaust valve drain hole 4012 is defined on the upper surface of the exhaust valve seat 401, and a drain hole positioning boss 4013 is defined on the lower surface of the exhaust valve seat 401, coaxially with the exhaust valve drain hole 4012. A drain hole positioning groove 201 is defined on one side of the exhaust valve on the cylinder head 20. During installation, the drain hole positioning boss 4013 is inserted into the drain hole positioning groove 201 in the cylinder head 20, thereby positioning the entire exhaust valve seat 401. A cylinder head drain hole 202 is defined on the cylinder head 20, one end of which extends to the bottom of the drain hole positioning groove 201. The drain hole positioning groove 201 is coaxially disposed with the cylinder head drain hole 202.

[0043] See also Figure 2-Figure 5 The exhaust valve seat 401 is provided with a circle of exhaust valve openings 4011 inclined in the same direction. When exhaust is completed, the high-pressure gas carries the ionic liquid upward along the exhaust valve openings 4011. Since the exhaust valve openings 4011 are a circle of inclined channels, the gas-liquid two-phase outflow forms a circular rotating flow. After impacting the exhaust valve plate 402, the gas-liquid two-phase flow flows down along the exhaust valve plate rib 4021 and accumulates in the space covered by the exhaust valve cover 41 (i.e., the first chamber 43).

[0044] Furthermore, the top flow passage portion of the exhaust valve cover 41 (i.e., the exhaust valve cover outlet channel 412) has a downwardly folded exhaust valve cover inner concave corner 411, that is, the top of the exhaust valve cover 41 is at a relatively low height at the end of the exhaust valve cover outlet channel 412, and the height gradually increases along the end of the exhaust valve cover outlet channel 412 toward the inner cavity side wall portion of the exhaust valve cover 41. After the initial swirl collision, the unseparated ionic liquid continues to flow upward in the space formed by the exhaust valve cover 41 along with the high-pressure gas. When passing through the exhaust valve cover inner concave corner 411, the flow direction of the gas-liquid two-phase flow changes, so the collision continues to separate a portion of the liquid. The separated liquid flows downward to the exhaust valve lift limiter 403 and then continues to flow downward, pouring down along the exhaust valve plate retaining edge 4021.

[0045] Furthermore, the ionic liquid accumulated within the first chamber 43 flows downward through the exhaust valve drain hole 4012 and into the drain pipe 501 through the cylinder head drain hole 202. The high-temperature ionic liquid is transported to the cooling structure 50 through the drain pipe 501, where it is then cooled by the cooling structure 50 to become a low-temperature or room-temperature ionic liquid. After being cooled by the cooling structure 50, the lower-temperature ionic liquid enters the refill pipe 502 and, driven by the high-pressure gas within the first chamber, flows from the refill pipe 502 through the refill port 205 on the cylinder head 20 and into the cylinder 10. The cooling structure 50 employed in the present invention can be any heat exchanger capable of exchanging heat to cool the ionic liquid, and the cooling structure 50 is not specifically limited.

[0046] After the exhaust process is complete, high-pressure gas and ionic liquid accumulate in the first chamber 43. When the exhaust process of the cylinder 10 ends and the expansion process begins, the ionic liquid is re-injected into the cylinder 10 through the liquid replenishment pipe 502 under the pressure of the high-pressure gas in the first chamber 43. After the accumulated ionic liquid is replenished, the high-pressure gas in the first chamber 43 will continue to flow into the cylinder due to the pressure difference. Therefore, a liquid-discharging and gas-blocking control mechanism is required to prevent gas leakage into the cylinder after the liquid replenishment is completed.

[0047] Furthermore, the exhaust valve seat 401 adopts a stepped shaft structure. The exhaust valve seat 401 includes, from top to bottom, a first small diameter section 4014, a large diameter section 4015, and a second small diameter section 4016. The exhaust valve orifice 4011 penetrates the first small diameter section 4014, the large diameter section 4015, and the second small diameter section 4016. The diameters of the first small diameter section 4014 and the second small diameter section 4016 are both smaller than the diameter of the large diameter section 4015. The lower end of the exhaust valve orifice 4011 is located at the lower end surface of the second small diameter section 4016. The upper end of the exhaust valve orifice 4011 is located at the upper end surface of the first small diameter section 4014; the lower end surfaces of the exhaust valve plate 402 and the exhaust valve guide ring 406 are against the upper end surface of the first small diameter section 4014, and the lower end surface of the exhaust valve plate 402 covers the upper end of the exhaust valve orifice 4011; a sinking cavity 44 is provided at the bottom of the exhaust valve cavity, and the second small diameter section 4016 is embedded in the sinking cavity 44. A distance is left between the lower end surface of the second small diameter section 4016 and the bottom of the sinking cavity 44, and the exhaust port 204 is connected to the bottom of the sinking cavity 44. The lower end surface of the large diameter section 4015 abuts against the upper edge of the sinking cavity 44, and the lower end surface of the exhaust valve cover 41 abuts against the outer edge of the large diameter section 4015. The exhaust valve cover 41 and the large diameter section 4015 enclose the first chamber 43. The first small diameter section 4014, the exhaust valve plate 402 and the exhaust valve lift limiter 403 are all located in the first chamber 43; the exhaust valve lift limiter 403, the exhaust valve guide ring 406 and the exhaust valve seat 401 are installed on the exhaust valve bolt 404 from top to bottom. The exhaust valve bolt 404 04 is threadedly connected to the exhaust valve lift limiter 403 and the exhaust valve seat 401. The exhaust valve disc 402 is sleeved on the outer ring of the exhaust valve guide ring 406 and can slide automatically along the exhaust valve guide ring 406. A gap is left between the exhaust valve lift limiter 403 and the exhaust valve seat 401 to allow the exhaust valve disc 402 to move up and down. The exhaust valve bolt 404, the exhaust valve seat 401, the exhaust valve disc 402, the exhaust valve lift limiter 403, the exhaust valve guide ring 406, and the exhaust valve cover 41 are coaxially arranged. The diameter of the outer edge of the exhaust valve disc rib 4021 is larger than the diameter of the top flow-through portion of the exhaust valve cover 41 (i.e., the exhaust valve cover outlet passage 412).

[0048] Based on this, the present invention further proposes two forms of liquid-passing and gas-blocking structures, namely the liquid-passing and gas-blocking float mechanism of Example 1 and the light detection mechanism of Example 2.

[0049] Figure 6 This is the first embodiment of the present invention's liquid-through-gas-blocking method, which is controlled by a float mechanism. The liquid-through-gas-blocking float mechanism 60 mainly includes a float ball 601, a baffle 602, a pull rope 603, and a gravity ball 604.

[0050] Furthermore, the gravity ball 604 pulls the baffle 602 through the traction rope 603 to cover the exhaust valve drain hole 4012 on the exhaust valve seat 401. A float 601 made of a relatively light material is provided on the upper portion of the baffle 602. The total weight of the gravity ball 604 and the traction rope 603 is substantially the same as the total weight of the float 601 and the baffle 602.

[0051] When ionic liquid accumulates in the first chamber 43, the float 601 will float up with the baffle 602. At this time, the upper end of the exhaust valve drain hole 4012 opens, and the ionic liquid accumulated in the first chamber 43 flows through the exhaust valve drain hole 4012 into the cylinder head drain hole 202 and then into the drain pipe 501.

[0052] When the ionic liquid in the exhaust valve cover 41 is completely drained, the float 601 loses the buoyancy of the liquid and falls downward together with the baffle 602 under the gravity of the gravity ball 604 through the traction rope 603. The baffle 602 covers the exhaust valve drain hole 4012 to prevent gas from passing through.

[0053] Figure 7 This is the second embodiment of the present invention for liquid-passing and gas-blocking, which is controlled by a light detection mechanism. The light detection mechanism 70 mainly includes a transparent tube section 701, a light emitter 702, a light receiver 703, an electromagnetic three-way valve 704, and an exhaust communication pipe 705.

[0054] The transparent tube section 701 is connected to the drainage pipe 501 and serves as a part of the drainage pipe 501. The electromagnetic three-way valve 704 is arranged downstream of the transparent tube section 701. The light emitter 702 and the light receiver 703 are arranged on both sides of the transparent tube section 701. The light receiver 703 can receive the light emitted by the light emitter 702 and passing through the transparent tube section 701. Before the experiment begins, the light detection mechanism is calibrated. The light emitter 702 continuously emits light signals, and the output signals of the light receiver 703 are recorded. One is the detection signal when the entire liquid flows in the tube section, recorded as the first detection signal; the other is the detection signal when the gas phase appears in the tube after the liquid is drained, recorded as the second detection signal. The ionic liquid flows along the pipe 501 under the push of the high-pressure gas. At the initial moment of the rehydration, the pipe 501 is entirely in the liquid phase. At this time, the signal recognized by the optical receiver 703 is the first detection signal, which controls the transverse pipe of the electromagnetic three-way valve (that is, the liquid inlet 7041 and the liquid outlet 7042 of the electromagnetic three-way valve 704 are connected) to connect, and the exhaust port 7043 is closed, so that the liquid in the drainage pipe 501 flows directly into the cooling structure 50. When the rehydration behavior is nearing the end, gas appears in the drainage pipe 501. Phase, at this time, the signal recognized by the optical receiver 703 is the second detection signal, then it controls the electromagnetic three-way valve 704 to close the horizontal main line (that is, open the liquid inlet 7041 and close the liquid outlet 7042), and open the exhaust port 7043, and the exhaust connecting pipe 705 is connected to the exhaust pipe 413, so that the gas phase or gas-liquid two-phase in the discharge pipe 501 flows into the exhaust pipe 413 through the exhaust port 7043 and the exhaust connecting pipe 705, enters the rear fine separator, and then is purified and goes to the gas terminal.

[0055] In summary, the liquid separation structure at the exhaust valve proposed in the present invention enables the high-pressure gas with a high liquid content to be separated once through the swirl structure when it is discharged through the valve, and then to be deflected twice through the rib of the valve plate and the concave angle structure of the exhaust valve cover to achieve secondary separation. In the exhaust valve structure of the present invention, there is a certain space in the intake valve cover, and the discharged ionic liquid accumulates in this space, and is pushed by the high-pressure gas and then returned to the cylinder after passing through the cooler. This structure avoids the waste of ionic liquid, and basically all the outflowing ionic liquid can be returned to the cylinder without calculating the amount of replenishment, thereby achieving precise replenishment. The cooled ionic liquid can also cool the high-temperature ionic liquid in the cylinder, and can better absorb the compression heat in the cylinder during the subsequent compression process. It is an efficient separation and replenishment structure. During the replenishment process, liquid needs to be passed through and gas is blocked. To achieve this function, the present invention provides two embodiments, which cleverly avoid the leakage of high-pressure gas back to the cylinder.

Claims

1. Applicable to the exhaust valve liquid separation and liquid real-time replenishment mechanism of the ionic liquid compressor, characterized by: The invention comprises a cooling structure (50) and a cylinder (10), wherein the intake and exhaust ends of the cylinder (10) are connected to a cylinder head (20), an exhaust valve cavity is provided on the cylinder head (20), an exhaust valve assembly (40) is embedded in the exhaust valve cavity, and an exhaust valve cover (41) is further provided in the exhaust valve cavity for fixing the exhaust valve assembly (40) in the exhaust valve cavity, and a first chamber (43) is formed between the exhaust valve assembly (40) and the exhaust valve cover (41); The exhaust valve assembly (40) comprises an exhaust valve seat (401), an exhaust valve disc (402), an exhaust valve lift limiter (403), an exhaust valve bolt (404), an elastic element and an exhaust valve guide ring (406); the exhaust valve seat (401) is fixed in the exhaust valve cavity; the exhaust valve lift limiter (403), the exhaust valve guide ring (406) and the exhaust valve seat (401) are mounted on the exhaust valve bolt (404) from top to bottom; the exhaust valve lift limiter (403) and the exhaust valve seat (401) are fixedly connected to the exhaust valve bolt (404); the exhaust valve disc (402) is sleeved on the outer ring of the exhaust valve guide ring (406) and can automatically slide along the exhaust valve guide ring (406); an elastic element is provided between the exhaust valve disc (402) and the exhaust valve lift limiter (403); the elastic element can push the exhaust valve disc (402) to be pressed against the exhaust valve seat (401); The exhaust valve seat (401) is provided with a circle of exhaust valve openings (4011) inclined in the same direction and capable of forming a circular rotating flow when the gas-liquid two-phase flows out. The lower end of the exhaust valve opening (4011) is communicated with the bottom of the exhaust valve cavity. The upper end of the exhaust valve opening (4011) extends to the sealing surface between the exhaust valve seat (401) and the exhaust valve plate (402). The outer edge of the exhaust valve plate (402) is provided with a circle of exhaust valve plate retaining edges (4021) inclined downward. The exhaust valve seat (401) is provided with an exhaust valve drain hole (4012) at the bottom of the first chamber (43); the inlet of the cooling structure (50) is communicated with the exhaust valve drain hole (4012) through a drain pipe (501); a liquid-passing and air-blocking mechanism is provided on the passage between the inlet of the cooling structure (50) and the exhaust valve drain hole (4012); and the outlet of the cooling structure (50) is communicated with the cylinder (10) through a liquid-supplementing pipe (502); An exhaust port (204) is provided on the cylinder cover (20), one end of the exhaust port (204) is communicated with the cylinder (10), and the other end of the exhaust port (204) is communicated with the bottom of the exhaust valve chamber.

2. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The elastic element is an exhaust valve spring (405), and the top of the exhaust valve plate (402) and the bottom of the exhaust valve lift limiter (403) are both provided with grooves for the end of the exhaust valve spring (405) to be embedded. The upper and lower ends of the exhaust valve spring (405) are respectively embedded in the grooves at the bottom of the exhaust valve lift limiter (403) and the grooves at the top of the exhaust valve plate (402), and the exhaust valve spring (405) is in a compressed state.

3. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The top flow passage portion of the inner cavity of the exhaust valve cover (41) is provided with an exhaust valve cover inner concave corner (411) folded downward.

4. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 3, characterized in that: The diameter of the outer edge of the exhaust valve plate retaining edge (4021) is larger than the diameter of the top flow-through portion of the inner cavity of the exhaust valve cover (41).

5. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The cylinder cover (20) is provided with a fluid replenishing orifice (205) communicating with the top of the inner cavity of the cylinder (10), and the outlet of the cooling structure (50) is communicated with the fluid replenishing orifice (205) via a fluid replenishing pipe (502).

6. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: A cylinder head drain hole (202) is provided on the cylinder head (20), one end of the cylinder head drain hole (202) is communicated with the lower end of the exhaust valve drain hole (4012), and the other end of the cylinder head drain hole (202) extends to the surface of the cylinder head (20) and is communicated with the drain pipe (501).

7. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 6, characterized in that: The exhaust valve seat (401) is provided with a drainage hole positioning boss (4013) at the lower end of the exhaust valve drainage hole (4012), and the cylinder head (20) is provided with a drainage hole positioning groove (201) for the drainage hole positioning boss (4013) to be embedded in at a position opposite to the drainage hole positioning boss (4013), and the drainage hole positioning boss (4013) is embedded in the drainage hole positioning groove (201).

8. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The exhaust valve seat (401) adopts a stepped shaft structure. The exhaust valve seat (401) includes, from top to bottom, a first small diameter section (4014), a large diameter section (4015), and a second small diameter section (4016). The exhaust valve orifice (4011) passes through the first small diameter section (4014), the large diameter section (4015), and the second small diameter section (4016). The diameters of the first small diameter section (4014) and the second small diameter section (4016) are both smaller than the large diameter section. The diameter of the second small-diameter section (4015) is the same as that of the second small-diameter section (4016), the lower end of the exhaust valve opening (4011) is located at the lower end surface of the second small-diameter section (4016), and the upper end of the exhaust valve opening (4011) is located at the upper end surface of the first small-diameter section (4014); the lower end surfaces of the exhaust valve plate (402) and the exhaust valve guide ring (406) are in contact with the upper end surface of the first small-diameter section (4014), and the lower end surface of the exhaust valve plate (402) covers the upper end of the exhaust valve opening (4011); A sinking cavity (44) is provided at the bottom of the exhaust valve cavity, the second small diameter section (4016) is embedded in the sinking cavity (44), a distance is left between the lower end surface of the second small diameter section (4016) and the bottom of the sinking cavity (44), and the exhaust port (204) is communicated with the bottom of the sinking cavity (44); The lower end surface of the large diameter section (4015) abuts against the upper edge of the sinking cavity (44), and the lower end surface of the exhaust valve cover (41) abuts against the outer edge of the large diameter section (4015). The exhaust valve cover (41) and the large diameter section (4015) enclose the first chamber (43). The first small diameter section (4014), the exhaust valve plate (402) and the exhaust valve lift limiter (403) are all located in the first chamber (43). The exhaust valve bolt (404), the exhaust valve seat (401), the exhaust valve plate (402), the exhaust valve lift limiter (403), the exhaust valve guide ring (406) and the exhaust valve cover (41) are coaxially arranged.

9. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The liquid-through and gas-blocking mechanism adopts a liquid-through and gas-blocking float mechanism (60), which comprises a float (601), a baffle (602), a pulling rope (603) and a gravity ball (604). The baffle (602) is arranged at the upper end of the exhaust valve discharge hole (4012), the float (601) is arranged on the upper part of the baffle (602), the upper end of the pulling rope (603) is connected to the baffle (602), and the lower end of the pulling rope (603) is connected to the gravity ball (604). The gravity ball (604) can pull the baffle (602) through the pulling rope (603) to cover the upper end of the exhaust valve discharge hole (4012). The total weight of the gravity ball (604) and the pulling rope (603) is the same as the total weight of the float (601) and the baffle (602).

10. The exhaust valve liquid separation and liquid real-time replenishment mechanism for an ionic liquid compressor according to claim 1, characterized in that: The liquid-passing and gas-blocking mechanism adopts a light detection mechanism (70), which comprises a transparent tube section (701), a light emitter (702), a light receiver (703), and an electromagnetic three-way valve (704). The transparent tube section (701) is connected to the liquid discharge pipe (501) and serves as a part of the liquid discharge pipe (501). The light emitter (702) and the light receiver (703) are respectively located on both sides of the transparent tube section (701). The light receiver (703) can receive light emitted by the light emitter (702) and passing through the transparent tube section (701). The electromagnetic three-way valve (704) is provided with a liquid inlet (7041), a liquid outlet (7042), and an air outlet (7043). The liquid inlet (7041) and the liquid outlet (7042) of the electromagnetic three-way valve (704) are connected to the liquid discharge pipe (501) and are located downstream of the transparent tube section (701). The light receiver (703) is electrically connected to the electromagnetic three-way valve (704). The electromagnetic three-way valve (704) can connect the liquid inlet (7041) and the liquid outlet (7042) of the electromagnetic three-way valve (704) and close the exhaust port (7043) according to a first detection signal of the light receiver (703); the electromagnetic three-way valve (704) can open the liquid inlet (7041), close the liquid outlet (7042) and open the exhaust port (7043) of the electromagnetic three-way valve (704) according to a second detection signal of the light receiver (703). The first detection signal is a signal detected by the optical receiver (703) when the transparent tube section (701) is full of liquid flowing; The second detection signal is a signal detected by the light receiver (703) when a gas phase appears in the transparent tube section (701).

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