阅读说明：本技术 一种具有过压保护功能的注射器装置 (Syringe device with overvoltage protection function ) 是由 梅海明 陈明峰 汪青松 胡群邦 梁金 于 2021-08-19 设计创作，主要内容包括：本发明公开一种具有过压保护功能的注射器装置,其中,具有过压保护功能的注射器装置包括安装支架、注射装置、保护装置和动力组件；注射装置包括安装于所述安装支架的注射腔体、及活动连接于所述注射腔体的活塞杆部；保护装置活动连接于所述安装支架,并包括安装壳和内设于所述安装壳的弹性件；所述活塞杆部具有活动穿设所述安装壳的抵接部,所述抵接部与所述弹性件抵接,且所述抵接部设有朝侧向凸出的限位部；动力组件设于所述安装支架,且所述动力组件的输出端与所述安装壳连接。本发明技术方案对注射装置起到保护的作用。(The invention discloses an injector device with an overvoltage protection function, wherein the injector device with the overvoltage protection function comprises a mounting bracket, an injection device, a protection device and a power assembly; the injection device comprises an injection cavity arranged on the mounting bracket and a piston rod part movably connected with the injection cavity; the protection device is movably connected to the mounting bracket and comprises a mounting shell and an elastic part arranged in the mounting shell; the piston rod part is provided with an abutting part movably penetrating through the mounting shell, the abutting part abuts against the elastic piece, and the abutting part is provided with a limiting part protruding towards the side direction; the power assembly is arranged on the mounting bracket, and the output end of the power assembly is connected with the mounting shell. The technical scheme of the invention plays a role in protecting the injection device.)

1. An injector device with overpressure protection function is characterized by comprising

Mounting a bracket;

the injection device comprises an injection cavity arranged on the mounting bracket and a piston rod part movably connected with the injection cavity;

the protection device is movably connected to the mounting bracket and comprises a mounting shell and an elastic part arranged in the mounting shell; the piston rod part is provided with an abutting part movably penetrating through the mounting shell, the abutting part abuts against the elastic piece, and the abutting part is provided with a limiting part protruding towards the side direction; and

the power assembly is arranged on the mounting bracket, and the output end of the power assembly is connected with the mounting shell.

2. The over-pressure protection syringe device of claim 1 wherein said protection device further comprises an adjustment member disposed within said mounting housing, said adjustment member being spaced from said abutment;

the elastic piece is arranged between the abutting part and the adjusting piece, the initial distance of the adjusting piece relative to the abutting part is adjustable, and the initial position is adjusted by adjusting the position of the adjusting piece in the mounting shell, so that the initial length of the elastic piece is increased or shortened, and the initial pressure of the elastic piece is further adjusted.

3. The injector device with overpressure protection function as claimed in claim 2, wherein the elastic member is configured as a spring, a side of the adjusting member facing the spring is provided with a limit pillar, the spring is sleeved on the limit pillar, and the height of the limit pillar is lower than that of the spring.

4. The injector device with the overpressure protection function as claimed in claim 2, wherein a screw adjusting portion is disposed on a side of the adjusting member away from the elastic member, the mounting shell is opened with an adjusting hole, and the screw adjusting portion is rotatably inserted into the adjusting hole.

5. The injector device with overvoltage protection as claimed in claim 2, wherein said protection device further comprises a control module and a position detection device, said position detection device is disposed on said mounting housing and is configured to detect a change in position of said abutting portion with respect to said mounting housing, said position detection device is electrically connected to said control module, said control module is electrically connected to said power assembly;

when the position detection device detects that the position change of the abutting part relative to the mounting shell reaches a preset degree, the position detection device sends a signal to the control module, and the control module can control the power assembly to stop working, so that the injection process is stopped.

6. The injector device with overpressure protection of claim 5 wherein said position sensing means includes a photosensor and a sensor stop;

the photoelectric sensor is arranged on the mounting shell; the sensor blocking piece is provided with a fixing part and a light blocking part, the fixing part is arranged between the abutting part and the elastic part, and the light blocking part is connected with the fixing part and extends along the radial direction of the fixing part;

when the light blocking part blocks the photoelectric sensor, the photoelectric sensor sends a signal to the control module to control the power assembly to stop working.

7. The injector device according to claim 1, wherein the mounting housing comprises a mounting housing body and a limiting member detachably connected to an end of the mounting housing body close to the injection device, the abutting portion movably penetrates the limiting member, and the limiting member abuts against the limiting portion to limit the limiting portion from separating from the mounting housing.

8. The injector device with overvoltage protection function according to claim 1, wherein the power assembly comprises a lead screw motor and a movable block, the movable block is movably arranged on an output shaft section of the lead screw motor, and the movable block is connected with the protection device.

9. The injector device with the over-pressure protection function according to claim 8, wherein the power assembly further comprises a guide rod, the guide rod is arranged on the mounting bracket in a manner of extending along the output shaft of the lead screw motor and is inserted into the movable block.

10. The injector device with overpressure protection as claimed in claim 1, wherein said mounting bracket includes a mounting bracket body, a connecting member connected to said mounting bracket body, at least one elastic buffer member disposed between said mounting bracket body and said connecting member;

the power assembly and the injection device are respectively arranged on two sides of the mounting bracket body, the protection device and the injection device are positioned on the same side of the mounting bracket body, the power assembly is connected with the protection device through a fixing piece, and the mounting bracket body is provided with an avoiding opening for the fixing piece to pass through.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an injector device with an overvoltage protection function.

Background

The pressure in the pipeline of the existing medical instrument with the pipeline is gradually increased under the condition that the pipeline is blocked or equipment fails, the excessive pressure in the pipeline not only brings huge burden to the pipe wall, but also can damage the equipment in the instrument if the operation of the instrument is stopped in time. Therefore, the equipment with the pipeline needs to be provided with a device for protecting the equipment, and the equipment can be protected in time under the condition that the equipment is in failure.

Disclosure of Invention

The invention mainly aims to provide an injector device with an overpressure protection function, and aims to protect the injector device.

In order to achieve the purpose, the injector device with the overpressure protection function comprises a mounting bracket, an injection device, a protection device and a power assembly; the injection device comprises an injection cavity arranged on the mounting bracket and a piston rod part movably connected with the injection cavity; the protection device is movably connected to the mounting bracket and comprises a mounting shell and an elastic part arranged in the mounting shell; the piston rod part is provided with an abutting part movably penetrating through the mounting shell, the abutting part abuts against the elastic piece, and the abutting part is provided with a limiting part protruding towards the side direction; the power assembly is arranged on the mounting bracket, and the output end of the power assembly is connected with the mounting shell.

Optionally, the protection device further comprises an adjusting member disposed in the mounting housing, and the adjusting member is spaced apart from the abutting portion; the elastic piece is arranged between the abutting part and the adjusting piece, the initial distance of the adjusting piece relative to the abutting part is adjustable, the initial position is adjusted by adjusting the position of the adjusting piece in the mounting shell, the initial length of the elastic piece is increased or shortened, and the initial pressure of the elastic piece is further adjusted.

Optionally, the elastic member is configured as a spring, a limiting upright is disposed on one side of the adjusting member facing the spring, the spring is sleeved on the limiting upright, and the height of the limiting upright is lower than that of the spring.

Optionally, one side that the regulating part deviates from the elastic component is provided with spiral regulation portion, the adjusting hole has been seted up to the installation shell, spiral regulation portion rotates and wears to locate the adjusting hole.

Optionally, the protection device further includes a control module and a position detection device, the position detection device is disposed in the mounting shell and is configured to detect a position change of the abutting portion relative to the mounting shell, the position detection device is electrically connected to the control module, and the control module is electrically connected to the power assembly; when the position detection device detects that the position change of the abutting part relative to the mounting shell reaches a preset degree, the position detection device sends a signal to the control module, and the control module can control the power assembly to stop working, so that the injection process is stopped.

Optionally, the position detection device comprises a photoelectric sensor and a sensor barrier; the photoelectric sensor is arranged on the mounting shell; the sensor separation blade is provided with a fixing part and a light blocking part, the fixing part is arranged on the abutting part, and the light blocking part is connected with the fixing part and extends along the radial direction of the fixing part; when the light blocking part blocks the photoelectric sensor, the photoelectric sensor sends a signal to the control module to control the power assembly to stop working.

Optionally, the mounting shell includes a mounting shell body and a limiting member detachably connected to one end of the mounting shell body close to the injection device, the abutting portion movably penetrates through the limiting member, and the limiting member abuts against the limiting portion to limit the limiting portion from disengaging from the mounting shell body.

Optionally, the power assembly comprises a screw motor and a movable block, the movable block is movably arranged on an output shaft section of the screw motor, and the movable block is connected with the protection device.

Optionally, the power assembly further comprises a guide rod, and the guide rod extends along the direction of the output shaft of the screw rod motor and is arranged on the mounting bracket in a penetrating manner.

Optionally, the mounting bracket includes a mounting bracket body and a connecting member connected to the mounting bracket body, and at least one elastic buffer member is disposed between the mounting bracket body and the connecting member; the power assembly and the injection device are respectively arranged on two sides of the mounting bracket body, the protection device and the injection device are positioned on the same side of the mounting bracket body, the power assembly is connected with the protection device through a fixing piece, and the mounting bracket body is provided with an avoiding opening for the fixing piece to pass through.

According to the technical scheme, the piston rod part movably arranged in the injection cavity is connected with the protection device, the power assembly is connected with the mounting shell, and the power assembly drives the piston rod part connected with the mounting shell to provide original power for drawing injection for the piston rod part. When the pressure in the injection cavity is too high, the piston rod part can relieve the pressure of the injection cavity through the protection device, and then the pressure in the injection device is reduced. Specifically, the protection device comprises an installation shell and an elastic piece arranged on the installation shell, wherein the piston rod part is provided with a butting part, the butting part is connected with the elastic piece, and the butting part is movably limited on the installation shell through a limit part protruding towards the side direction. When the pressure in the injection cavity is too high, the abutting part can be compressed and decompressed in the direction of the elastic part, so that the too high pressure in the injection cavity is reduced, and finally the injection device, other pipelines and equipment connected with the injection device are protected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of an injector device with overpressure protection of the present invention;

FIG. 2 is a cross-sectional view of one embodiment of the injector device with overpressure protection of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic diagram of a power assembly of an embodiment of the injector device with overpressure protection of the present invention;

FIG. 5 is a schematic diagram of sheath flow detection;

FIG. 6 is a diagram of a sheath fluid channel.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an injector device with an overpressure protection function.

Referring to fig. 1 to 2, in an embodiment of the present invention, the injector device with overpressure protection function includes a mounting bracket 1, an injection device 2, a protection device 3 and a power assembly 4; the injection device 2 comprises an injection cavity 21 arranged on the mounting bracket 1 and a piston rod part 22 movably connected with the injection cavity 21; the protection device 3 is movably connected to the mounting bracket 1 and comprises a mounting shell 31 and an elastic part 33 arranged in the mounting shell 31; the piston rod part 22 is provided with a contact part 221 movably penetrating the mounting shell 31, the contact part 221 is contacted with the elastic piece 33, and the contact part 221 is provided with a limit part 222 protruding towards the side direction; the power assembly 4 is arranged on the mounting bracket 1, and the output end of the power assembly 4 is connected with the mounting shell 31.

According to the technical scheme, the piston rod part 22 movably arranged in the injection cavity 21 is connected with the protection device 3, the power component 4 is connected with the mounting shell 31, and the power component 4 drives the piston rod part 22 connected with the mounting shell 31 to provide original power for drawing injection for the piston rod part 22. When the pressure in the injection cavity 21 is too high, the piston rod 22 can release the pressure in the injection cavity 21 through the protection device 3, thereby reducing the pressure inside the injection device 2. Specifically, the protector 3 includes a mounting case 31 and an elastic member 33 provided in the mounting case 31, the piston rod portion 22 includes an abutting portion 221, the abutting portion 221 is connected to the elastic member 33, and the abutting portion 221 is movably restricted to the mounting case 31 by a stopper portion 222 protruding in the lateral direction. When the pressure in the injection cavity 21 is too high, the abutting portion 221 may compress and release the pressure in the direction of the elastic member 33, so that the too high pressure in the injection cavity 21 is reduced, and the injection device 2 and other pipes and devices connected to the injection device 2 are finally protected.

Further, in this embodiment, referring to fig. 2, the protection device 3 further includes an adjusting member 32 disposed in the mounting shell 31, and the adjusting member 32 is spaced apart from the abutting portion 221; the elastic member 33 is disposed between the abutting portion 221 and the adjusting member 32, an initial distance of the adjusting member 32 relative to the abutting portion 221 is adjustable, and the initial position is adjusted by adjusting a position of the adjusting member 32 in the mounting case 31, so that an initial length of the elastic member 33 is increased or shortened, and an initial pressure of the elastic member 33 is adjusted. However, the design is not limited to this, and in other embodiments, the pressure maintaining device may not only adjust the initial pressure by the adjusting element 32, but also may change the initial pressure of the elastic element 33 by replacing the elastic element 33 with a constant elastic force or replacing the elastic element 33 with a different length by connecting one end of the elastic element 33 to the abutting portion 221 and the other end of the elastic element 33 to the mounting housing 31.

Further, in the present embodiment, the elastic member 33 is configured as a spring. Specifically, one side of the adjusting part 32 facing the spring is provided with a limiting upright post 321, the spring is sleeved on the limiting upright post 321, and the height of the limiting upright post 321 is lower than that of the spring. The spring can obtain higher stability by being sleeved on the limiting upright post 321, so that the spring can be compressed and reset on the same straight line all the time. However, the design is not limited thereto, and in other embodiments, the elastic element 33 may be configured as a spring, the position-limiting upright 321 is provided with a position-limiting groove for installing the spring, one end of the spring is limited in the position-limiting groove, and the other end of the spring abuts against the abutting portion 221 of the piston rod portion 22.

Further, one side of the adjusting part 32 departing from the elastic part 33 is provided with a spiral adjusting part 322, the mounting shell 31 is provided with an adjusting hole, and the spiral adjusting part 322 rotates to penetrate through the adjusting hole. In this embodiment, the adjusting manner adopted by the adjusting member 32 is screw adjustment, so that a screw adjusting portion 322 is disposed on one side of the adjusting member 32 away from the elastic member 33, the mounting shell 31 is provided with an adjusting hole, the screw adjusting portion 322 passes through the adjusting hole, and a screw thread on the screw adjusting portion 322 is matched with the adjusting hole, so that the specific position of the adjusting member 32 in the mounting shell 31 is adjusted by rotating the screw adjusting portion 322. The screw fit can realize the conversion of the movement in the rotation direction into the movement in the height direction, and the screw fit has extremely high stability and extremely high adjustment precision, so that the adjusting member 32 can more accurately adjust the initial pressure of the elastic member 33.

Optionally, the protection device 3 further includes a control module and a position detection device 34, the position detection device 34 is disposed on the mounting shell 31, the position detection device 34 is configured to detect a position change of the abutting portion 221 relative to the mounting shell 31, the position detection device 34 is electrically connected to the control module, and the control module is electrically connected to the power assembly 4; when the position detecting device 34 detects that the position change of the abutting portion 221 relative to the mounting shell 31 reaches a preset degree, the position detecting device 34 sends a signal to the control module, and the control module can control the power assembly 4 to stop working, so that the injection process is stopped. The position detection device 34 actually detects the position at which the abutting portion 221 is displaced, that is, the position at which the elastic member 33 is compressed. In other words, the pressure in the spring chamber is the magnitude of the pressure, because the pressure in the spring chamber is transmitted to the elastic member 33 through the abutting part 221 at one end of the piston rod part 22, the elastic member 33 is deformed by the extrusion of the abutting part 221, and the elastic member 33 is compressed, the position detection device 34 detects whether the compressed amount of the elastic member 33 reaches the position of the detection device, if the elastic member 33 is compressed to the position of the position detection device 34, the position detection device 34 sends a signal to the control module, and the control module can control the power assembly 4 to stop working, thereby stopping the injection process, ensuring that the pressure in the instrument cannot be further enhanced, and ensuring the safety of the instrument.

Specifically, the position detection device 34 includes a photosensor 341 and a sensor flap 342; the photoelectric sensor 341 is disposed on the mounting case 31; the sensor flap 342 has a fixed portion 343 and a light blocking portion 344, the fixed portion 343 is disposed at the abutting portion 221, and the light blocking portion 344 is connected to the fixed portion 343 and extends along a radial direction of the fixed portion 343; when the light blocking part 344 blocks the photoelectric sensor 341, the photoelectric sensor 341 sends a signal to the control module to control the power assembly 4 to stop working. In the embodiment, the fixing portion 343 of the sensor stop 342 is disposed between the abutting portion 221 and the elastic member 33, and the fixing portion 343 displaces along with the compression of the elastic member 33 while the abutting portion 221 presses the spring, so that the light blocking portion 344 connected to the fixing member 44 also displaces along with the compression of the elastic member 33. However, the design is not limited thereto, in other embodiments, the position detecting device 34 may also be a hall sensor and a triggering element, the hall sensor is disposed on the mounting shell 31, the triggering element is disposed on the abutting portion 221, and when the abutting portion 221 compresses the elastic member 33 to the position of the hall sensor, the hall sensor is triggered to send a signal to the control module, so as to control the power assembly 4 to stop working.

Further, the mounting shell 31 includes a mounting shell body 311 and a limiting member 312 detachably connected to one end of the mounting shell body 311 close to the injection device 2, the abutting portion 221 movably penetrates through the limiting member 312, and the limiting member 312 abuts against the limiting portion 222 to limit the limiting portion 222 from separating from the mounting shell 31. The limiting member 312 is detachably connected to the mounting housing 31, which is beneficial to mounting or replacing the elastic member 33, the adjusting member 32 and other parts.

Further, the power assembly 4 includes a screw motor 41 and a movable block 42, the movable block 42 is movably disposed on an output shaft section of the screw motor 41, and the movable block 42 is connected with the protection device 3. In this embodiment, the power assembly 4 mainly uses a screw motor 41, and the screw motor 41 drives the movable block 42 to move, so as to drive the protection device 3 connected to the movable block 42 and the piston rod 22 elastically connected to the protection device 3 to move, thereby implementing injection. Further, the power assembly 4 further includes a guide rod 43, and the guide rod 43 extends along the output shaft direction of the screw motor 41 and is disposed on the mounting bracket 1, and penetrates through the movable block 42. The guide rod 43 can limit the specific moving direction of the movable block 42, so as to improve the stability of the lead screw motor 41 driving the movable block 42 to move. However, the design is not limited to this, in other embodiments, the power assembly 4 may further include a transmission motor for rotating the torque, and a conveyor belt connected to the transmission motor, the conveyor belt is connected to the protection device 3, and the conveyor belt moves in a manner of rotating an output shaft of the transmission motor, so as to drive the protection device 3 on the conveyor belt and the piston rod 22 elastically connected to the protection device 3 to move, thereby achieving the injection.

Further, power device is equipped with movable block detection device 45, movable block detection device 45 is used for detecting the concrete position of movable block 42, and in this embodiment, movable block detection device includes movable block detection sensor and movable block detection separation blade, lead screw motor is located to movable block detection sensor, movable block detection separation blade is located movable block 42 works as when movable block 42 moves to the one end that is closest to lead screw motor, triggers movable block detection sensor, movable block sensor sends signal to control module, stops lead screw motor's function, places movable block 42 and continues to remove and lead to lead screw motor to send the trouble.

Optionally, the mounting bracket includes a mounting bracket body 12 and a connecting member 13 connected to the mounting bracket body, and at least one elastic buffer member is disposed between the mounting bracket body 12 and the connecting member 13; specifically, the connecting piece 13 in the mounting bracket 1 is used for connecting the whole equipment, the whole equipment has certain vibration when working, and the vibration influence to be transmitted from the connecting piece 13 to the mounting bracket body 12 is reduced through the elastic buffer piece 14. In addition, the elastic buffer parts 14 can be arranged on two opposite sides of the mounting bracket body 12, so that the vibration transmitted by the connecting part 13 is relieved and absorbed together, and the damping effect is further improved. Further, the elastic buffer is a rubber ring, but the design is not limited to this, and in other embodiments, the elastic buffer may be made of other materials with elasticity. The power assembly 4 with the injection device 2 is located respectively in the both sides of installing support body 12, protection device 3 with the injection device 2 is located same one side of installing support body 12, power assembly 4 with protection device 3 passes through the mounting 44 and connects, and is equipped with on the installing support body 12 and supplies the dodging mouth of crossing 11 that the mounting 44 passed. In this way, the connection between the power assembly 4 and the protection device 3 is realized through the avoidance port 11, and the avoidance port 11 arranged on the mounting bracket body 12 can reduce the weight of the mounting bracket body 12, and further reduce the weight of the whole device; with protection device 3 and power component 4 set up respectively in the both sides of installing support body 12, can the effectual area that reduces installing support body 12, and then reduce the panel material that installing support body 12 adopted, reach and reduce the required cost of installing support body 12.

In addition, it should be added that the syringe device with overpressure protection function in this application can be applied to all devices with fluid paths. However, the present embodiment can be applied to a protection device for a sheath fluid channel of a blood cell analyzer without limitation.

It should be noted that the process of generating the sheath flow and the manner of implementing the detection are as follows, and referring to fig. 5, the sheath flow includes: a sample flow and a sheath flow, wherein when a certain amount of blood cells are sucked and acted by a specific amount of reagent, the blood sample is injected into a conical flow chamber filled with diluent through a nozzle, two flows are converged at the top, the cells are singly arranged in a row and pass through the center of the flow chamber under the coating of the sheath formed by the diluent, a flow channel at the top is narrow, and the mixed sheath flow wraps a flow which is formed by arranging the single cells in a straight line and is called as a sheath flow; when the blood cells suspended in the sheath fluid pass through the laser detection area after secondary acceleration. Blood cells are irradiated with a laser beam, and the properties of the scattered light produced are related to the cell size, the refractive index of the cell membrane and the internal structure of the cell. The low angle scattered light reflects the size of the cell and the high angle scattered light reflects the internal fine structure and particulate matter of the cell. The photodiode receives the scattered light signals and converts the scattered light signals into electric pulses, and blood cell size and cell internal information can be obtained according to the acquired pulse data.

Based on the principle and manner of sheath flow generation and detection as described above, an injection flow path as shown in fig. 6 is provided. The injection flow path comprises a first injector, a second injector and a detection device; the flow chamber is provided with a first passage and a second passage, the first injector is communicated with the first passage and the second passage, and the second injector is communicated with the second passage. Further, a one-way two-way valve is arranged at the position where the first injector is communicated with the second channel and used for controlling the communication or the blockage of the first injector and the second channel.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.