Gas-liquid valve assembly and endoscope gas-liquid system

Abstract

The utility model provides a gas-liquid valve assembly and a gas-liquid system, and belongs to the technical field of endoscope gas-liquid valves.The gas-liquid valve assembly comprises a first valve seat, a second valve seat, a third valve seat and a fourth valve seat, the first valve seat is provided with a first valve cavity, a gas inlet, a water inlet, a gas outlet and a water outlet, and the first valve cavity comprises a first position and a second position; the first valve element is movably arranged in the first valve cavity, and a first element opening is formed in the first valve element; the second valve seat is provided with a second valve cavity, a suction inlet and a suction outlet, and the second valve cavity comprises a third position and a fourth position; the second valve element is movably connected with the second valve seat, and the second valve element is provided with a second element opening. The gas-liquid valve assembly has the beneficial effects that gas injection, water injection, vacuum and liquid suction operations are achieved through the gas-liquid valve assembly, switching of the operations can be completed by blocking the first core opening or the second core opening through fingers and pressing the first valve element or the second valve element, and the gas-liquid valve assembly is very simple and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of endoscope gas-liquid valves and relates to a gas-liquid valve component and an endoscope gas-liquid system. Background Art

[0002] Endoscope is a commonly used detection instrument in modern medical diagnosis and treatment. It can enter the stomach through the mouth or other natural orifices into the body. It can also enter the human body through a small incision made during surgery. Doctors can use the endoscope to see lesions that cannot be displayed by X-rays, and perform sampling or treatment on the required parts through instrument operation. It is very useful for diagnosing the disease, and operations such as jetting, spraying water, and aspirating liquid are required during use.

[0003] In the prior art, a single gas-liquid valve is often unable to achieve these functions, so multiple valves such as jet valves, water spray valves, and liquid suction valves are required to be used in conjunction, which not only takes up space but also makes the use complicated, leaving much room for improvement. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and proposes a gas-liquid valve component and an endoscope gas-liquid system.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a gas-liquid valve assembly, comprising:

[0006] A first valve seat, which is provided with a first valve cavity, an air inlet, a water inlet, an air outlet and a water outlet, wherein the first valve cavity includes a first position and a second position;

[0007] A first valve core, which is movably disposed in the first valve cavity and can be moved to the first position or the second position, the first valve core is provided with a first core port, and the first core port is communicated with the first valve cavity;

[0008] A second valve seat is provided with a second valve cavity, a suction inlet and a suction outlet, wherein the second valve cavity includes a third position and a fourth position;

[0009] a second valve core, which is movably connected to the second valve seat and can move to the third position or the fourth position, and the second valve core is provided with a second core port;

[0010] When the first valve core moves to the first position and the first core opening is opened, the air outlet is communicated with the air inlet through the first valve cavity, and the first core opening is communicated with the air inlet through the first valve cavity;

[0011] When the first valve core moves to the first position and the first core port is closed, the air outlet is communicated with the air inlet through the first valve cavity;

[0012] When the first valve core moves to the second position and the first core port is closed, the water outlet is communicated with the water inlet through the first valve cavity;

[0013] When the second valve core moves to the third position and the second core port is closed, the suction outlet is blocked;

[0014] When the second valve core moves to the fourth position and the second core port is closed, the suction outlet communicates with the suction inlet through the second valve chamber.

[0015] In the above-mentioned gas-liquid valve assembly, it also includes a mounting seat, and the first valve seat and the second valve seat are both connected to the mounting seat. When the first valve core is in contact with the mounting seat, the first valve core is located at the first position, and when the second valve core is in contact with the mounting seat, the second valve core is located at the third position.

[0016] In the above-mentioned gas-liquid valve assembly, it also includes a first end cover, which is connected to one end of the first valve core close to the first core port, and when the first valve core moves relative to the first valve seat, it drives the first end cover closer to or away from the mounting seat, and when one end of the first valve core contacts the bottom surface of the first valve cavity, the first valve core is located at the second position.

[0017] In the above-mentioned gas-liquid valve assembly, it also includes a first elastic member, one end of the first elastic member is connected to the mounting seat, and the other end of the first elastic member is connected to the first end cover, and the first elastic member pushes the first end cover away from the mounting seat, thereby causing the first valve core to move from the second position toward the first position.

[0018] In the above-mentioned gas-liquid valve assembly, it also includes a second end cover, which is connected to one end of the second valve core close to the second core port, and when the second valve core moves relative to the second valve seat, it drives the second end cover to approach or move away from the mounting seat, and when one end of the second valve core contacts the bottom surface of the second valve cavity, the second valve core is located at the fourth position.

[0019] In the above-mentioned gas-liquid valve assembly, it also includes a second elastic member, one end of the second elastic member is connected to the mounting seat, and the other end of the second elastic member is connected to the second end cover, and the second elastic member pushes the second end cover away from the mounting seat, thereby causing the second valve core to move from the fourth position to the third position.

[0020] In the above-mentioned gas-liquid valve assembly, the first valve core is further provided with a partition, the partition contacts the side wall of the first valve cavity, the partition divides the first valve cavity into a first space, a second space and a third space, and the first space, the second space and the third space are separated from each other by the partition;

[0021] When the first valve core moves to the first position, the air outlet and the first core port are both connected to the air inlet through the first space, the water inlet is connected to the second space, and the water outlet is connected to the third space;

[0022] When the first valve core moves to the second position, the first core port is communicated with the air inlet through the first space, the air outlet is communicated with the second space, and the water outlet is communicated with the water inlet through the third space.

[0023] In the above-mentioned gas-liquid valve assembly, the radius of the communication port through which the first core port communicates with the first valve cavity is greater than the radius of the gas outlet.

[0024] In the above-mentioned gas-liquid valve assembly, the second valve core is further provided with a first communication port, a second communication port and a third communication port, and the second core port, the first communication port, the second communication port and the third communication port are integrally connected;

[0025] When the second valve core moves to the third position, the first communication port is communicated with the suction outlet;

[0026] When the second valve element moves to the fourth position, the second communication port communicates with the suction outlet, and the third communication port communicates with the suction inlet.

[0027] Secondly, an endoscope gas-liquid system includes the gas-liquid valve assembly described above, and further includes:

[0028] A liquid bottle, connected to a first water pipe and a first air pipe, wherein the liquid bottle is connected to the water inlet through the first water pipe, and the liquid bottle is connected to the air inlet through the first air pipe;

[0029] an air pump, which is disposed on the first air pipe and can supply air to the first air pipe;

[0030] A suction bottle, which is connected to a second water pipe, and the suction bottle is connected to the suction outlet through the second water pipe;

[0031] A suction pump is connected to a second air pipe, and the suction pump is communicated with the suction bottle through the second air pipe.

[0032] Compared with the prior art, the beneficial effects of the utility model are:

[0033] 1. The gas-liquid valve assembly realizes the operations of jetting, water spraying, vacuum and liquid suction. The switching of these operations can be completed by blocking the first core port or the second core port with a finger and pressing the first valve core or the second valve core. It can be completed with one hand, which is very simple and convenient.

[0034] 2. The first valve seat and the second valve seat are both installed on the mounting seat. When the first valve core is in contact with the mounting seat, the first valve core is located at the first position, thereby limiting the first valve core at the first position. When the second valve core is in contact with the mounting seat, the second valve core is located at the third position, thereby limiting the second valve core at the third position.

[0035] 3. When the first valve core moves relative to the first valve seat, it drives the first end cover closer to or away from the mounting seat. When one end of the first valve core contacts the bottom surface of the first valve cavity, the first valve core is located at the second position, thereby limiting the first valve core at the second position. When the second valve core moves relative to the second valve seat, it drives the second end cover closer to or away from the mounting seat. When one end of the second valve core contacts the bottom surface of the second valve cavity, the second valve core is located at the fourth position, thereby limiting the second valve core at the fourth position.

[0036] 4. The first elastic member pushes the first end cover away from the mounting seat, thereby causing the first valve core to move from the second position toward the first position, ensuring that the first valve core of the gas-liquid valve assembly is located at the first position without being affected by external forces; the second elastic member pushes the second end cover away from the mounting seat, thereby causing the second valve core to move from the fourth position toward the third position, ensuring that the second valve core of the gas-liquid valve assembly is located at the third position without being affected by external forces.

[0037] 5. Through the cooperation of the liquid bottle, air pump, suction bottle, suction pump and gas-liquid valve assembly, the air jet, water spray, vacuum and liquid suction operations are realized, which is very simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the gas-liquid valve assembly of the utility model in an initial state.

[0039] Figure 2 It is a schematic diagram of the gas-liquid valve assembly of the utility model in the jet state.

[0040] Figure 3 It is a schematic diagram of the gas-liquid valve assembly of the utility model in the water spraying state.

[0041] Figure 4 This is a schematic diagram of the gas-liquid valve assembly of the utility model in a vacuum state.

[0042] Figure 5It is a schematic diagram of the gas-liquid valve assembly of the utility model in the liquid absorbing state.

[0043] Figure 6 It is a structural schematic diagram of the endoscope gas-liquid system of the utility model.

[0044] In the figure, 100, first valve seat; 110, first valve cavity; 111, first space; 112, second space; 113, third space; 120, air inlet; 130, water inlet; 140, air outlet; 150, water outlet; 200, first valve core; 210, first core port; 220, partition; 300, second valve seat; 310, second valve cavity; 320, suction inlet; 330, suction outlet; 400, second valve core; 410, second core port; 420, first connecting port; 430, second connecting port; 440, third connecting port; 500, mounting seat; 600, first end cover; 610, first elastic member; 700, second end cover; 710, second elastic member; 800, liquid bottle; 810, first water pipe; 820, first air pipe; 830, air pump; 900, suction bottle; 910, second water pipe; 920, second air pipe; 930, suction pump. DETAILED DESCRIPTION

[0045] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0050] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0051] like Figure 1-Figure 6 As shown, a gas-liquid valve assembly includes: a first valve seat 100, a first valve core 200, a second valve seat 300 and a second valve core 400.

[0052] The first valve seat 100 is provided with a first valve cavity 110 , an air inlet 120 , a water inlet 130 , an air outlet 140 and a water outlet 150 , and the first valve cavity 110 includes a first position and a second position.

[0053] The first valve core 200 is movably disposed in the first valve cavity 110 and can be moved to the first position or the second position. The first valve core 200 is provided with a first core opening 210 , and the first core opening 210 is communicated with the first valve cavity 110 .

[0054] The second valve seat 300 is provided with a second valve cavity 310 , a suction inlet 320 and a suction outlet 330 , and the second valve cavity 310 includes a third position and a fourth position.

[0055] The second valve core 400 is movably connected to the second valve seat 300 and can be moved to the third position or the fourth position. The second valve core 400 is provided with a second core port 410 .

[0056] When the first valve core 200 moves to the first position and the first core opening 210 is opened, the air outlet 140 and the first core opening 210 are both in communication with the air inlet 120 through the first valve cavity 110 .

[0057] Specifically, the radius of the communication port between the first core port 210 and the first valve cavity 110 is larger than the radius of the air outlet 140 , so the pressure of the air outlet 140 is lower than the pressure of the first core port 210 , and the gas enters from the air inlet 120 and is discharged from the first core port 210 .

[0058] At this time, the gas-liquid valve assembly is not operated in any way, so that the first valve core 200 is located at the first position, and the gas-liquid valve assembly is in an initial state. Gas enters from the gas inlet 120 and is discharged from the first core port 210 .

[0059] When the first valve core 200 moves to the first position and the first core port 210 is closed, the air outlet 140 is communicated with the air inlet 120 through the first valve cavity 110 .

[0060] At this time, the first core opening 210 is blocked with a finger to close it, so that the first valve core 200 is located at the first position, and the gas-liquid valve assembly is in a jet state, and the gas enters from the gas inlet 120 and is discharged from the gas outlet 140 .

[0061] When the first valve core 200 moves to the second position and the first core port 210 is closed, the water outlet 150 is communicated with the water inlet 130 through the first valve cavity 110 .

[0062] At this time, the first core opening 210 is blocked with a finger to close it, so that the first valve core 200 is located at the second position, and the gas-liquid valve assembly is in a water spraying state, and the liquid enters from the water inlet 130 and is discharged from the water outlet 150 .

[0063] When the second valve core 400 moves to the third position and the second core port 410 is closed, the suction outlet 330 is blocked.

[0064] At this time, use your finger to block the second core port 410 to close it, so that the second valve core 400 is in the third position, the gas-liquid valve assembly is in a vacuum state, the suction inlet 320 is not in a connected state, and the vacuum operation can be completed through the cooperation of an external vacuum pump.

[0065] When the second valve core 400 moves to the fourth position and the second core port 410 is closed, the suction outlet 330 communicates with the suction inlet 320 through the second valve chamber 310 .

[0066] At this time, the second core opening 410 is blocked with a finger to close it, so that the second valve core 400 is located at the fourth position. The gas-liquid valve assembly is in a liquid absorbing state, and the liquid enters from the suction inlet 320 and is discharged from the suction outlet 330 .

[0067] In this embodiment, the gas-liquid valve assembly is used to realize the operations of jetting, spraying water, vacuuming and sucking liquid. The switching of these operations can be completed by blocking the first core opening 210 or the second core opening 410 with fingers, and pressing the first valve core 200 or the second valve core 400. It can be completed with one hand, which is very simple and convenient.

[0068] like Figure 1-Figure 6 As shown, on the basis of the above embodiment, it also includes a mounting seat 500, the first valve seat 100 and the second valve seat 300 are both connected to the mounting seat 500, when the first valve core 200 is in contact with the mounting seat 500, the first valve core 200 is located in the second position, when the second valve core 400 is in contact with the mounting seat 500, the second valve core 400 is located in the third position.

[0069] In this embodiment, the first valve seat 100 and the second valve seat 300 are both installed on the mounting seat 500. When the first valve core 200 contacts the mounting seat 500, the first valve core 200 is located at the first position, thereby limiting the first valve core 200 at the first position. When the second valve core 400 contacts the mounting seat 500, the second valve core 400 is located at the third position, thereby limiting the second valve core 400 at the third position.

[0070] like Figure 1-Figure 6 As shown, on the basis of the above embodiment, it also includes a first end cover 600, and the first end cover 600 is connected to one end of the first valve core 200 close to the first core port 210. When the first valve core 200 moves relative to the first valve seat 100, it drives the first end cover 600 to approach or move away from the mounting seat 500. When the first end cover 600 contacts the mounting seat 500, the first valve core 200 is located in the second position.

[0071] In this embodiment, when the first valve core 200 moves relative to the first valve seat 100, it drives the first end cover 600 to move closer to or away from the mounting seat 500. When one end of the first valve core 200 contacts the bottom surface of the first valve cavity 110, the first valve core 200 is located in the second position, thereby limiting the first valve core 200 at the second position.

[0072] like Figure 1-Figure 6As shown, on the basis of the above embodiment, it also includes a first elastic member 610, one end of the first elastic member 610 is connected to the mounting seat 500, and the other end of the first elastic member 610 is connected to the first end cover 600, and the first elastic member 610 pushes the first end cover 600 away from the mounting seat 500, thereby moving the first valve core 200 from the second position toward the first position.

[0073] Specifically, the first elastic member 610 may be a spring.

[0074] In this embodiment, the first elastic member 610 pushes the first end cover 600 away from the mounting seat 500, thereby moving the first valve core 200 from the second position toward the first position, ensuring that the first valve core 200 of the gas-liquid valve assembly is located at the first position without being affected by external forces.

[0075] like Figure 1-Figure 6 As shown, on the basis of the above embodiment, it also includes a second end cover 700, and the second end cover 700 is connected to one end of the second valve core 400 close to the second core port, and when the second valve core 400 moves relative to the second valve seat 300, it drives the second end cover 700 to approach or move away from the mounting seat 500, and when the second end cover 700 contacts the mounting seat 500, the second valve core 400 is located at the fourth position.

[0076] In this embodiment, when the second valve core 400 moves relative to the second valve seat 300, it drives the second end cover 700 to move closer to or away from the mounting seat 500. When one end of the second valve core 400 contacts the bottom surface of the second valve cavity 310, the second valve core 400 is located at the fourth position, thereby limiting the second valve core 400 at the fourth position.

[0077] like Figure 1-Figure 6 As shown, on the basis of the above embodiment, it also includes a second elastic member 710, one end of the second elastic member 710 is connected to the mounting seat 500, and the other end of the second elastic member 710 is connected to the second end cover 700, and the second elastic member 710 pushes the second end cover 700 away from the mounting seat 500, thereby moving the second valve core 400 from the fourth position toward the third position.

[0078] Specifically, the second elastic member 710 may be a spring.

[0079] In this embodiment, the second elastic member 710 pushes the second end cover 700 away from the mounting seat 500, thereby moving the second valve core 400 from the fourth position toward the third position, ensuring that the second valve core 400 of the gas-liquid valve assembly is located at the third position without being affected by external forces.

[0080] like Figure 1-Figure 6 As shown, on the basis of the above embodiment, the first valve core 200 is further provided with a partition 220, and the partition 220 contacts the side wall of the first valve cavity 110, and the partition 220 divides the first valve cavity 110 into a first space 111, a second space 112 and a third space 113, and the first space 111, the second space 112 and the third space 113 are separated from each other by the partition 220.

[0081] Specifically, there are a plurality of partitions 220 , and each of the partitions 220 is distributed along the axial direction of the first valve core 200 .

[0082] Specifically, the partition 220 is provided with a sealing ring, and the partition 220 contacts the side wall of the first valve chamber 110 through the sealing ring to complete the sealing separation.

[0083] In this embodiment, when the first valve core 200 moves to the first position, the air outlet 140 and the first core port 210 are connected to the air inlet 120 through the first space 111, the water inlet 130 is connected to the second space 112, and the water outlet 150 is connected to the third space 113.

[0084] In this embodiment, when the first valve core 200 moves to the second position, the first core port 210 is connected to the air inlet 120 through the first space 111, the air outlet 140 is connected to the second space 112, and the water outlet 150 is connected to the water inlet 130 through the third space 113.

[0085] like Figure 1-Figure 6 As shown, based on the above embodiment, the second valve core 400 is further provided with a first connecting port 420, a second connecting port 430 and a third connecting port 440, and the second core port 410, the first connecting port 420, the second connecting port 430 and the third connecting port 440 are integrally connected.

[0086] In this embodiment, when the second valve core 400 moves to the third position, the first communication port 420 is communicated with the suction outlet 330 .

[0087] In this embodiment, when the second valve core 400 moves to the fourth position, the second communication port 430 is communicated with the suction outlet 330 , and the third communication port 440 is communicated with the suction inlet 320 .

[0088] like Figure 1-Figure 6As shown, an endoscope gas-liquid system includes the gas-liquid valve assembly described above, and also includes: a liquid bottle 800, an air pump 830, a suction bottle 900 and a suction pump 930.

[0089] The liquid bottle 800 is connected to a first water pipe 810 and a first air pipe 820 . The liquid bottle 800 is connected to the water inlet 130 through the first water pipe 810 , and the liquid bottle 800 is connected to the air inlet 120 through the first air pipe 820 .

[0090] The air pump 830 is disposed on the first air pipe 820 , and the air pump 830 can supply air to the first air pipe 820 .

[0091] The suction bottle 900 is connected to a second water pipe 910 , and the suction bottle 900 is connected to the suction outlet 330 through the second water pipe 910 .

[0092] The suction pump 930 is connected to the second air pipe 920 , and the suction pump 930 is connected to the suction bottle 900 through the second air pipe 920 .

[0093] When the first valve core 200 moves to the first position and the first core opening 210 is opened, the air outlet 140 and the first core opening 210 are both in communication with the air inlet 120 through the first valve cavity 110 .

[0094] At this time, no operation is performed on the gas-liquid valve assembly, so that the first valve core 200 is located in the first position, and the gas-liquid valve assembly is in an initial state. Under the action of the air pump 830, the gas enters the air inlet 120 from the first air pipe 820 and is then discharged from the first core port 210.

[0095] When the first valve core 200 moves to the first position and the first core port 210 is closed, the air outlet 140 is communicated with the air inlet 120 through the first valve cavity 110 .

[0096] At this time, use your finger to plug the first core opening 210 to close it, so that the first valve core 200 is in the first position, and the gas-liquid valve assembly is in a jet state. Under the action of the air pump 830, the gas enters the air inlet 120 from the first air pipe 820 and is then discharged from the air outlet.

[0097] When the first valve core 200 moves to the second position and the first core port 210 is closed, the water outlet 150 is communicated with the water inlet 130 through the first valve cavity 110 .

[0098] At this time, use your finger to block the first core opening 210 to close it, so that the first valve core 200 is in the second position. The gas-liquid valve assembly is in a water spraying state. When the air inlet 120 is blocked, the air pump 830 pressurizes the liquid bottle 800, pushing the liquid into the water inlet 130 through the first water pipe 810, and then discharged from the water outlet 150.

[0099] When the second valve core 400 moves to the third position and the second core port 410 is closed, the suction outlet 330 is blocked.

[0100] At this time, use your finger to block the second core port 410 to close it, so that the second valve core 400 is in the third position, the gas-liquid valve assembly is in a vacuum state, the suction inlet 320 and the suction inlet 320 are not in a connected state, and the suction pump 930 directly vacuums the suction bottle 900 through the second air pipe 920.

[0101] When the second valve core 400 moves to the fourth position and the second core port 410 is closed, the suction outlet 330 communicates with the suction inlet 320 through the second valve chamber 310 .

[0102] At this time, use your finger to block the second core opening 410 to close it, so that the second valve core 400 is in the fourth position. The gas-liquid valve assembly is in the liquid suction state, and the suction pump 930 acts on the suction bottle 900 to suck liquid into the suction inlet 320 and then into the second water pipe 910 from the suction outlet 330.

[0103] In this embodiment, the liquid bottle 800, the air pump 830, the suction bottle 900 and the suction pump 930 are coordinated with the gas-liquid valve assembly to realize the operations of jetting, water spraying, vacuum and liquid suction, which is very simple and convenient.

Claims

1. A gas-liquid valve assembly, characterized in that: include: A first valve seat, which is provided with a first valve cavity, an air inlet, a water inlet, an air outlet and a water outlet, wherein the first valve cavity includes a first position and a second position; A first valve core, which is movably disposed in the first valve cavity and can be moved to the first position or the second position, the first valve core is provided with a first core port, and the first core port is communicated with the first valve cavity; A second valve seat is provided with a second valve cavity, a suction inlet and a suction outlet, wherein the second valve cavity includes a third position and a fourth position; a second valve core, which is movably connected to the second valve seat and can move to the third position or the fourth position, and the second valve core is provided with a second core port; When the first valve core moves to the first position and the first core opening is opened, the air outlet is communicated with the air inlet through the first valve cavity, and the first core opening is communicated with the air inlet through the first valve cavity; When the first valve core moves to the first position and the first core port is closed, the air outlet is communicated with the air inlet through the first valve cavity; When the first valve core moves to the second position and the first core port is closed, the water outlet is communicated with the water inlet through the first valve cavity; When the second valve core moves to the third position and the second core port is closed, the suction outlet is blocked; When the second valve core moves to the fourth position and the second core port is closed, the suction outlet communicates with the suction inlet through the second valve chamber.

2. A gas-liquid valve assembly according to claim 1, characterized in that: It also includes a mounting seat, the first valve seat and the second valve seat are both connected to the mounting seat, when the first valve core is in contact with the mounting seat, the first valve core is located at the first position, when the second valve core is in contact with the mounting seat, the second valve core is located at the third position.

3. A gas-liquid valve assembly as claimed in claim 2, characterized in that: It also includes a first end cover, which is connected to one end of the first valve core close to the first core port. When the first valve core moves relative to the first valve seat, it drives the first end cover to move closer to or away from the mounting seat. When one end of the first valve core contacts the bottom surface of the first valve cavity, the first valve core is located at the second position.

4. A gas-liquid valve assembly as claimed in claim 3, characterized in that: It also includes a first elastic member, one end of which is connected to the mounting seat, and the other end of the first elastic member is connected to the first end cover, and the first elastic member pushes the first end cover away from the mounting seat, thereby moving the first valve core from the second position toward the first position.

5. A gas-liquid valve assembly as claimed in claim 2, characterized in that: It also includes a second end cover, which is connected to one end of the second valve core close to the second core port. When the second valve core moves relative to the second valve seat, it drives the second end cover to move closer to or away from the mounting seat. When one end of the second valve core contacts the bottom surface of the second valve cavity, the second valve core is located at the fourth position.

6. A gas-liquid valve assembly as claimed in claim 5, characterized in that: It also includes a second elastic member, one end of which is connected to the mounting seat, and the other end of the second elastic member is connected to the second end cover, and the second elastic member pushes the second end cover away from the mounting seat, thereby moving the second valve core from the fourth position toward the third position.

7. A gas-liquid valve assembly according to claim 1, characterized in that: The first valve core is further provided with a partition, the partition contacts the side wall of the first valve cavity, the partition divides the first valve cavity into a first space, a second space and a third space, and the first space, the second space and the third space are separated from each other by the partition; When the first valve core moves to the first position, the air outlet and the first core port are both connected to the air inlet through the first space, the water inlet is connected to the second space, and the water outlet is connected to the third space; When the first valve core moves to the second position, the first core port is communicated with the air inlet through the first space, the air outlet is communicated with the second space, and the water outlet is communicated with the water inlet through the third space.

8. A gas-liquid valve assembly as claimed in claim 1, characterized in that: The radius of the communication port through which the first core port communicates with the first valve cavity is greater than the radius of the air outlet.

9. A gas-liquid valve assembly according to claim 1, characterized in that: The second valve core is further provided with a first communication port, a second communication port and a third communication port, and the second core port, the first communication port, the second communication port and the third communication port are integrally connected; When the second valve core moves to the third position, the first communication port is communicated with the suction outlet; When the second valve element moves to the fourth position, the second communication port communicates with the suction outlet, and the third communication port communicates with the suction inlet.

10. An endoscope gas-liquid system, characterized in that: A gas-liquid valve assembly according to any one of claims 1 to 9, further comprising: A liquid bottle, connected to a first water pipe and a first air pipe, wherein the liquid bottle is connected to the water inlet through the first water pipe, and the liquid bottle is connected to the air inlet through the first air pipe; an air pump, which is disposed on the first air pipe and can supply air to the first air pipe; A suction bottle, which is connected to a second water pipe, and the suction bottle is connected to the suction outlet through the second water pipe; A suction pump is connected to a second air pipe, and the suction pump is communicated with the suction bottle through the second air pipe.

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