Continuous reciprocating drug delivery device

Abstract

This invention relates to the field of anesthesia equipment technology, and particularly to a continuous reciprocating drug supply device, comprising: a plunger pump mechanism, an upper valve plate (27), a lower valve plate (28), and a second solenoid valve (35); the plunger pump mechanism includes an upper plunger cavity and a lower plunger cavity, when the plunger rod (30) moves upward, the volume of the upper plunger cavity decreases and the volume of the lower plunger cavity increases, and when it moves downward, the volume of the lower plunger cavity decreases and the volume of the upper plunger cavity increases; the upper valve plate (27) and the lower valve plate (28) together provide fluid channels between the tank body (3) and the upper opening of the upper plunger cavity, between the upper and lower openings of the upper plunger cavity, between the lower opening of the upper plunger cavity and the evaporation chamber of the evaporation mechanism, between the tank body (3) and the upper opening of the lower plunger cavity, between the upper and lower openings of the lower plunger cavity, and / or between the lower opening of the lower plunger cavity and the evaporation chamber of the evaporation mechanism; the upper opening of the lower plunger cavity is also selectively connected to the tank body (3) through the second solenoid valve (35). The present invention has a simple structure, is easy to process, and is easy to commercialize.

Description

Technical Field

[0001] This invention relates to the field of anesthesia equipment technology, and in particular to a continuous reciprocating drug delivery device. Background Technology

[0002] Vaporizers used in medical anesthesia machines can be broadly classified into two categories: One is the traditional mechanical vaporizer, which has been in use for a relatively long time alongside advancements in anesthesia technology and is still employed in various low-end anesthesia machines. Typical examples of this type include variable bypass in-loop vaporizers, general-purpose quantitative out-of-loop vaporizers with flow measurement, variable bypass dedicated quantitative out-of-loop vaporizers, and injection-type vaporizers. The other type is the electronically controlled vaporizer. This type combines the advantages of fully connecting anesthetic drugs with the principles of mechanical vaporizers, integrating electronic control and measurement technologies, resulting in significant improvements in concentration control and compliance. Typical examples in this category include the Alandin 2222 electronically controlled vaporizer, the Tec 6 desflurane vaporizer, the GE / Datex-Ohmeda Aladin and Alandin 2 cassette vaporizers, and the Maquet FLOW-i and Drager DIVA electronically injected vaporizers.

[0003] The core features of an anesthetic vaporizer are its ability to precisely control the output of anesthetic drug concentration and its rapid response. Analyzing the characteristics of the vaporizers mentioned above, it's clear that, except for the Maquet FLOW-i and Drager DIVA electro-injection vaporizers, other vaporizers, whether traditional mechanical or electrically controlled, first evaporate the liquid anesthetic drug into a gaseous state using various methods. Then, they control the ratio of the anesthetic gas output to fresh gas to achieve a specific concentration. This approach has a significant drawback: because the amount of substance is affected by temperature and environmental pressure, it's difficult to precisely control, leading to large errors in the anesthetic drug concentration output by the vaporizer.

[0004] Compared to other vaporizers, the Maquet FLOW-i and Drager DIVA electro-injection vaporizers control the amount of liquid anesthetic drug sprayed. After spraying, the anesthetic drug is heated and atomized within the vaporization chamber to ensure complete evaporation, and then mixed with fresh gas to achieve concentration control. Although electro-injection vaporizers control the amount of liquid drug, they are powered by compressed air, making it difficult to control the amount of anesthetic drug sprayed. Therefore, precise control of the anesthetic drug concentration is challenging; only by intermittently spraying small amounts and averaging the results can a relatively accurate concentration be achieved.

[0005] Patent application No. 202211660947.6 discloses an electrically controlled evaporator and its control method, proposing to control the volume of anesthetic by controlling the pushing speed through a plunger pump system and valve seat, utilizing the incompressibility of liquid volume to improve the accuracy of the output anesthetic concentration. Specifically, the plunger pump divides the plunger chamber into left and right chambers through a piston, and the volume of anesthetic is controlled by controlling the forward and backward speed of the piston. If the pushed liquid anesthetic is completely evaporated after mixing with fresh gas, a anesthetic gas mixture of a certain concentration can be obtained. However, the plunger pump in this application is a piston type, and the piston divides the plunger pump chamber into two chambers. To achieve the bubble removal function, it can only be placed horizontally, which is not conducive to product miniaturization; moreover, it requires precision machining of the inner hole of the plunger pump chamber, requiring a very high surface roughness, resulting in high processing costs. In addition, this application selectively connects the plunger chamber and the evaporation chamber through a switching valve and upper and lower valve plates of the evaporation core, but using two switching valves results in high processing costs, difficult assembly, and numerous points requiring sealing. In summary, this patent application has disadvantages in the processing and production process, including being unfavorable for product miniaturization, high processing costs, difficulty in sealing, complex structure, and difficulties in production. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of existing drug supply devices, such as being unfavorable for product miniaturization, high processing costs, difficult sealing, complex structure, and unfavorable for production, thereby providing a continuous reciprocating drug supply device.

[0007] To solve the above-mentioned technical problems, the present invention provides a continuous reciprocating drug supply device, comprising: a drug storage tank mechanism for holding anesthetic liquid 20, and an evaporation mechanism for evaporating the anesthetic liquid 20 into a gaseous state and mixing it with fresh gas to output a mixed anesthetic gas of a predetermined concentration. The device further comprises: a plunger pump mechanism, an upper valve plate 27, a lower valve plate 28, and a second solenoid valve 35.

[0008] The evaporation mechanism includes: an evaporation seat 16; the evaporation seat 16 is vertically provided with a deep hole cavity, which serves as the main plunger cavity of the plunger pump mechanism;

[0009] The main plunger cavity is provided with a sealing sleeve 33, which divides the main plunger cavity into an upper plunger cavity and a lower plunger cavity; the upper plunger cavity sidewall is provided with an upper plunger cavity opening and an upper plunger cavity lower opening; the lower plunger cavity sidewall is provided with a lower plunger cavity upper opening and a lower plunger cavity lower opening.

[0010] The plunger pump mechanism is further provided with a plunger rod 30, which is connected to the extension shaft of a linear motor 11 and moves up and down within the upper and lower plunger cavities under the control of the linear motor 11. The plunger rod 30 consists of a lower plunger rod section and an upper plunger rod section. The cross-sectional area of ​​the lower plunger rod section is larger than that of the upper plunger rod section, and its length is greater than the height of the lower plunger cavity. The bottom end of the lower plunger rod passes through the sealing sleeve 33 and is always located within the lower plunger cavity. When the plunger rod 30 moves upward, the volume of the upper plunger cavity decreases and the volume of the lower plunger cavity increases. When the plunger rod 30 moves downward, the volume of the lower plunger cavity decreases and the volume of the upper plunger cavity increases.

[0011] The upper valve plate 27 and the lower valve plate 28 are tightly fitted together to form a switching valve; the upper valve plate 27 rotates under the drive of the rotary motor 12, and together with the lower valve plate 28, provides fluid channels between the tank body 3 of the medicine storage tank mechanism and the upper opening of the upper plunger cavity, between the upper opening of the upper plunger cavity and the lower opening of the upper plunger cavity, between the lower opening of the upper plunger cavity and the evaporation chamber of the evaporation mechanism, between the tank body 3 and the upper opening of the lower plunger cavity, between the upper opening of the lower plunger cavity and the lower opening of the lower plunger cavity, and / or between the lower opening of the lower plunger cavity and the evaporation chamber of the evaporation mechanism.

[0012] The opening on the lower plunger cavity is also selectively connected to the tank body 3 through a second solenoid valve 35.

[0013] As an improvement to the above-mentioned device, the outer ring of the sealing sleeve 33 is fixedly connected to the inner wall of the main plunger cavity through a sealing ring, and the inner ring is tightly fitted to the plunger rod 30 through a sealing ring; the linear motor 11 is equipped with a first encoder 10, which is used to provide real-time feedback on the movement distance of the extension shaft of the linear motor 11, so as to achieve precise control of the movement of the plunger rod 30.

[0014] As an improvement to the above-mentioned device, the upper end of the evaporation seat 16 has a circular cut-edge groove. A first flat air passage 36 and a second flat air passage 37 are provided at the bottom of the groove. The first flat air passage 36 communicates with the fresh gas inlet 29, and the second flat air passage 37 communicates with the mixed anesthetic gas outlet 32. An evaporation seat boss is provided between the first flat air passage 36 and the second flat air passage 37. The circular cut-edge groove is arranged in a circumferential pattern near its bottom inner edge. hole, , , and Hole; among which,

[0015] The The hole is connected to the tank body 3 of the medicine storage tank mechanism through the first internal pipe of the evaporator seat 16;

[0016] The second internal pipe of the evaporator seat 16 communicates with the opening on the upper plunger cavity;

[0017] It communicates with the lower opening of the upper plunger cavity through the third internal pipe of the evaporator seat 16;

[0018] It communicates with the opening on the lower plunger cavity through the fourth internal pipe of the evaporator seat 16;

[0019] The The hole is connected to the lower opening of the lower plunger cavity through the fifth internal pipe of the evaporator seat 16;

[0020] The lower valve plate 28 is provided with a circular chamfered boss corresponding to the circular chamfered groove of the evaporator base 16, for blind insertion and positioning of the lower valve plate 28 and the evaporator base 16; the circular chamfered boss is also provided with a corresponding... hole, , , and One-to-one correspondence of holes hole, , , and The lower valve plate 28 is provided with a lower valve plate groove, which covers the first flat air passage 36, the second flat air passage 37 and the evaporator seat boss, and there is a gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss; the gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss serves as an evaporation chamber; the bottom of the lower valve plate groove is also provided with several through holes arranged in an arc.

[0021] The upper valve plate 27 is rotated by the rotary motor 12. The upper valve plate 27 is symmetrically provided with a first I-shaped groove and a second I-shaped groove. Both the inner and outer layers of the first and second I-shaped grooves are arc-shaped, and their center points are connected by a straight groove. The curvature of the outer layer of the first and second I-shaped grooves is similar to... hole, , and The circumferential curvature between the holes is the same; the curvature of the inner groove of the first and second I-shaped grooves is the same as the curvature of the through holes.

[0022] As an improvement to the above-mentioned device, the outer groove of the first I-shaped groove is covered by... Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic solution 20 flows from the tank body 3 of the storage tank mechanism through the Y1 hole, the first internal pipe of the evaporation seat 16, and... hole, Hole, first I-shaped groove, hole, The second internal pipe of the evaporator 16 and the opening on the upper plunger cavity flow into the upper plunger cavity of the first plunger pump group;

[0023] The outer groove of the first I-shaped groove covers Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes;

[0024] The outer groove of the first I-shaped groove covers When the inner groove of the first I-shaped groove covers the through hole of the lower valve plate 28, the first I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution 20 in the upper plunger cavity passes sequentially through the lower opening of the upper plunger cavity, the third internal pipe of the evaporator seat 16, and... , The pores, the first I-shaped groove, and the through hole flow into the evaporation chamber;

[0025] The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic solution 20 flows from the tank body 3 of the storage tank mechanism through the Y1 hole, the first internal pipe of the evaporation seat 16, and... hole, Hole, second I-shaped groove, hole, The evaporator seat 16 has a fourth internal pipe and an opening on the lower plunger cavity through which water flows into the lower plunger cavity;

[0026] The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes;

[0027] The outer groove of the second I-shaped groove covers When the inner groove of the second I-shaped groove covers the through hole of the lower valve plate 28, the second I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution 20 in the lower plunger cavity passes sequentially through the lower opening of the lower plunger cavity, the fifth internal pipe of the evaporator seat 16, and... , The water flows into the evaporation chamber through the holes, the second I-shaped groove, and the through hole;

[0028] As an improvement to the above-mentioned device, the first flat airway 36 is connected to the fresh gas inlet 29, and the second flat airway 37 is connected to the mixed anesthetic gas outlet 32; the anesthetic liquid 20 in the upper plunger cavity or the lower plunger cavity flows into the gap between the lower valve plate groove and the evaporation seat boss through the through hole and evaporates; the evaporated anesthetic gas is mixed with the fresh gas flowing in through the fresh gas inlet 29 and then output through the mixed anesthetic gas outlet 32.

[0029] As an improvement to the above-mentioned device, a concentration regulator 31 is provided between the second flat airway 37 and the mixed anesthetic gas outlet 32 ​​to adjust the cross-sectional area of ​​the fluid channel between the second flat airway 37 and the mixed anesthetic gas outlet 32.

[0030] As an improvement to the aforementioned device, an upper valve plate 27, a thrust bearing 26, a connecting shaft 25, a spring, a rotary motor connecting seat 14, a rotary motor 12, and a second encoder are sequentially arranged above the lower valve plate 28; wherein...

[0031] The spring is held between the rotary motor connecting seat 14 and the thrust bearing 26. The spring compression force is transmitted sequentially to the thrust bearing 26, the upper valve plate 27 and the lower valve plate 28, so that the upper valve plate 27 and the lower valve plate 28 fit tightly together.

[0032] The upper valve plate 27 is coupled to the connecting shaft 25. The motor shaft of the rotary motor drives the upper valve plate 27 to rotate through the connecting shaft 25, thereby realizing the transmission of torque.

[0033] The second encoder is used to position the rotation angle of the upper valve plate 27.

[0034] As an improvement to the aforementioned device, the medicine storage tank mechanism includes: a tank body 3, a liquid level column 2, an electronic liquid level gauge 9, a pressure sensor, and a first solenoid valve 8; wherein...

[0035] The tank 3 includes: an injection port 5 for injecting anesthetic solution 20 and a discharge port for discharging anesthetic solution 20 to the outside; the injection port 5 is equipped with a medicine cap 6, and the opening and closing of the discharge port is controlled by a discharge knob 17.

[0036] The liquid level column 2 is connected to the tank 3 and is used for manual observation of the liquid level height in the tank 3;

[0037] The electronic level gauge 9 is used to monitor the liquid level height of the tank 3 in real time;

[0038] The pressure sensor is used to monitor the pressure inside tank 3 in real time;

[0039] The first solenoid valve 8 is used to control the connection between the tank 3 and the fresh gas inlet 29.

[0040] This invention has the following advantages:

[0041] 1. This invention achieves precise control and rapid response of anesthetic drug concentration. The electrically controlled vaporizer provided by this invention controls the volume of the anesthetic drug by controlling the pushing speed of the anesthetic liquid 20. Utilizing the incompressibility of liquid volume, the accuracy of the output anesthetic drug concentration is improved. The effects of temperature and air pressure on the liquid anesthetic are negligible. A linear motor precisely controls the pushing speed of the plunger pump. The output anesthetic drug evaporates immediately after mixing with fresh gas, thus obtaining a definite anesthetic drug concentration. To obtain anesthetic gas of different concentrations at different flow rates, it is only necessary to control the flow rate of fresh gas and the pushing speed of the plunger pump.

[0042] 2. This invention uses only one switching valve. By controlling the rotation angle of the switching valve in conjunction with the opening and closing of the inlet and outlet of the two plunger pump assemblies, the plunger pumps can perform the functions of suction and push. When one plunger pump assembly is suctioning, the other plunger pump assembly can push at the same time. Moreover, the assembly is simple with only one switching valve, there are fewer points that need to be sealed, and the cost is low. Therefore, the structure is simple, easy to process and produce, and easy to commercialize.

[0043] 3. This invention utilizes a plunger-type plunger pump mechanism, which enables the plunger pump mechanism to be placed vertically, and the plunger chamber is located inside the evaporator seat, which is conducive to product miniaturization. Moreover, the overall structure is more compact, lighter, reduces the installation of pipelines, and greatly improves reliability.

[0044] 4. Compared with the piston structure used in existing drug supply devices, which requires precision machining of the inner hole of the plunger pump cavity, the plunger pump mechanism adopted in this application only requires precision machining of the plunger rod. The outer surface roughness of the plunger rod is required to be high, but the outer surface of the plunger rod is an outer circle, which is very easy to machine and has low processing cost.

[0045] 5. A concentration regulator 31 is installed between the O2 flat air passage hole and the mixed anesthetic gas outlet 32 ​​in the evaporator seat 16. By adjusting the concentration regulator 31, the cross-sectional area of ​​the fluid channel between the second flat air passage 37 and the mixed anesthetic gas outlet 32 ​​can be adjusted. As the concentration regulator 31 compresses the fluid channel, its cross-sectional area decreases. By adjusting the cross-sectional area of ​​the fluid channel, the concentration regulator 31 can adjust the flow rate within the fluid channel. When the cross-sectional area decreases, i.e., the fluid channel becomes narrower, the flow rate increases again. If the anesthetic liquid 20 flowing out of the small hole of the lower valve plate 28 is not completely evaporated, the residual anesthetic liquid 20 can achieve accelerated evaporation again after passing through the narrow channel adjusted by the concentration regulator 31. Attached Figure Description

[0046] Figure 1 A perspective view of the continuous reciprocating drug supply device provided by the present invention;

[0047] Figure 2 This is a cross-sectional view of the continuous reciprocating drug supply device provided by the present invention;

[0048] Figure 3 This is a schematic diagram of the base;

[0049] Figure 4 This is a schematic diagram of the switching valve at zero position.

[0050] Figure 5 This is a schematic diagram of drug aspiration in the upper plunger cavity;

[0051] Figure 6 A schematic diagram showing the simultaneous aspiration of the drug into the upper plunger cavity and the pushing of the drug into the lower plunger cavity;

[0052] Figure 7 This is a schematic diagram of the tank.

[0053] Figure 8 This is a schematic diagram of the top cover;

[0054] Figure 9 This is a schematic diagram of an evaporator base;

[0055] Figure 10 This is a schematic diagram of the lower valve plate;

[0056] Figure 11 This is a first schematic diagram of the upper valve plate;

[0057] Figure 12 This is a second schematic diagram of the upper valve plate.

[0058] Attached Figure Labels

[0059] Detailed Implementation

[0060] The technical solutions provided by the present invention will be further illustrated below with reference to the embodiments.

[0061] Example 1

[0062] like Figure 1-12 As shown, the present invention provides a continuous reciprocating drug supply device, comprising: a drug storage tank mechanism for holding anesthetic liquid 20, and an evaporation mechanism for evaporating the anesthetic liquid 20 into a gaseous state and mixing it with fresh gas to output a mixed anesthetic gas of a predetermined concentration. The device further comprises: a plunger pump mechanism, an upper valve plate 27, a lower valve plate 28, and a second solenoid valve 35.

[0063] The evaporation mechanism includes: an evaporation seat 16; the evaporation seat 16 is vertically provided with a deep hole cavity, which serves as the main plunger cavity of the plunger pump mechanism;

[0064] The main plunger cavity is provided with a sealing sleeve 33, which divides the main plunger cavity into an upper plunger cavity and a lower plunger cavity; the upper plunger cavity sidewall is provided with an upper plunger cavity opening and an upper plunger cavity lower opening; the lower plunger cavity sidewall is provided with a lower plunger cavity upper opening and a lower plunger cavity lower opening.

[0065] The plunger pump mechanism is further provided with a plunger rod 30, which is connected to the extension shaft of a linear motor 11 and moves up and down within the upper and lower plunger cavities under the control of the linear motor 11. The plunger rod 30 consists of a lower plunger rod section and an upper plunger rod section. The cross-sectional area of ​​the lower plunger rod section is larger than that of the upper plunger rod section, and its length is greater than the height of the lower plunger cavity. The bottom end of the lower plunger rod passes through the sealing sleeve 33 and is always located within the lower plunger cavity. When the plunger rod 30 moves upward, the volume of the upper plunger cavity decreases and the volume of the lower plunger cavity increases. When the plunger rod 30 moves downward, the volume of the lower plunger cavity decreases and the volume of the upper plunger cavity increases.

[0066] The upper valve plate 27 and the lower valve plate 28 are tightly fitted together to form a switching valve; the upper valve plate 27 rotates under the drive of the rotary motor 12, and together with the lower valve plate 28, provides fluid channels between the tank body 3 of the medicine storage tank mechanism and the upper opening of the upper plunger cavity, between the upper opening of the upper plunger cavity and the lower opening of the upper plunger cavity, between the lower opening of the upper plunger cavity and the evaporation chamber of the evaporation mechanism, between the tank body 3 and the upper opening of the lower plunger cavity, between the upper opening of the lower plunger cavity and the lower opening of the lower plunger cavity, and / or between the lower opening of the lower plunger cavity and the evaporation chamber of the evaporation mechanism.

[0067] The opening on the lower plunger cavity is also selectively connected to the tank body 3 through a second solenoid valve 35.

[0068] The outer ring of the sealing sleeve 33 is fixedly connected to the inner wall of the main plunger cavity through a sealing ring, and the inner ring is tightly fitted to the plunger rod 30 through a sealing ring; the linear motor 11 is equipped with a first encoder 10, which is used to provide real-time feedback on the movement distance of the extension shaft of the linear motor 11, so as to achieve precise control of the movement of the plunger rod 30.

[0069] The upper end of the evaporator 16 has a circular cut-edge groove. A first flat air passage 36 and a second flat air passage 37 are provided at the bottom of the groove. The first flat air passage 36 communicates with the fresh gas inlet 29, and the second flat air passage 37 communicates with the mixed anesthetic gas outlet 32. An evaporator boss is provided between the first flat air passage 36 and the second flat air passage 37. The circular cut-edge groove is arranged in a circumferential pattern near its bottom inner edge. hole, , , and Hole; among which,

[0070] The The hole is connected to the tank body 3 of the medicine storage tank mechanism through the first internal pipe of the evaporator seat 16;

[0071] The second internal pipe of the evaporator seat 16 communicates with the opening on the upper plunger cavity;

[0072] It communicates with the lower opening of the upper plunger cavity through the third internal pipe of the evaporator seat 16;

[0073] It communicates with the opening on the lower plunger cavity through the fourth internal pipe of the evaporator seat 16;

[0074] The The hole is connected to the lower opening of the lower plunger cavity through the fifth internal pipe of the evaporator seat 16;

[0075] The lower valve plate 28 is provided with a circular chamfered boss corresponding to the circular chamfered groove of the evaporator base 16, for blind insertion and positioning of the lower valve plate 28 and the evaporator base 16; the circular chamfered boss is also provided with a corresponding... hole, , , and One-to-one correspondence of holes hole, , , and The lower valve plate 28 is provided with a lower valve plate groove, which covers the first flat air passage 36, the second flat air passage 37 and the evaporator seat boss, and there is a gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss; the gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss serves as an evaporation chamber; the bottom of the lower valve plate groove is also provided with several through holes arranged in an arc.

[0076] The upper valve plate 27 is rotated by the rotary motor 12. The upper valve plate 27 is symmetrically provided with a first I-shaped groove and a second I-shaped groove. Both the inner and outer layers of the first and second I-shaped grooves are arc-shaped, and their center points are connected by a straight groove. The curvature of the outer layer of the first and second I-shaped grooves is similar to... hole, , and The circumferential curvature between the holes is the same; the curvature of the inner groove of the first and second I-shaped grooves is the same as the curvature of the through holes.

[0077] The outer groove of the first I-shaped groove covers Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic solution 20 flows from the tank body 3 of the storage tank mechanism through the Y1 hole, the first internal pipe of the evaporation seat 16, and... hole, Hole, first I-shaped groove, hole, The second internal pipe of the evaporator 16 and the opening on the upper plunger cavity flow into the upper plunger cavity of the first plunger pump group;

[0078] The outer groove of the first I-shaped groove covers Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes;

[0079] The outer groove of the first I-shaped groove covers When the inner groove of the first I-shaped groove covers the through hole of the lower valve plate 28, the first I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution 20 in the upper plunger cavity passes sequentially through the lower opening of the upper plunger cavity, the third internal pipe of the evaporator seat 16, and... , The pores, the first I-shaped groove, and the through hole flow into the evaporation chamber;

[0080] The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic solution 20 flows from the tank body 3 of the storage tank mechanism through the Y1 hole, the first internal pipe of the evaporation seat 16, and... hole, Hole, second I-shaped groove, hole, The evaporator seat 16 has a fourth internal pipe and an opening on the lower plunger cavity through which water flows into the lower plunger cavity;

[0081] The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes;

[0082] The outer groove of the second I-shaped groove covers When the inner groove of the second I-shaped groove covers the through hole of the lower valve plate 28, the second I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution 20 in the lower plunger cavity passes sequentially through the lower opening of the lower plunger cavity, the fifth internal pipe of the evaporator seat 16, and... , The water flows into the evaporation chamber through the holes, the second I-shaped groove, and the through hole;

[0083] The first flat airway 36 is connected to the fresh gas inlet 29, and the second flat airway 37 is connected to the mixed anesthetic gas outlet 32. The anesthetic liquid 20 in the upper or lower plunger cavity flows into the gap between the lower valve plate groove and the evaporator seat boss through the through hole and evaporates. The evaporated anesthetic gas is mixed with the fresh gas flowing in through the fresh gas inlet 29 and then output through the mixed anesthetic gas outlet 32.

[0084] A concentration regulator 31 is provided between the second flat airway 37 and the mixed anesthetic gas outlet 32 ​​to adjust the cross-sectional area of ​​the fluid channel between the second flat airway 37 and the mixed anesthetic gas outlet 32.

[0085] Above the lower valve plate 28, an upper valve plate 27, a thrust bearing 26, a connecting shaft 25, a spring, a rotary motor connecting seat 14, a rotary motor 12, and a second encoder are sequentially arranged; wherein...

[0086] The spring is held between the rotary motor connecting seat 14 and the thrust bearing 26. The spring compression force is transmitted sequentially to the thrust bearing 26, the upper valve plate 27 and the lower valve plate 28, so that the upper valve plate 27 and the lower valve plate 28 fit tightly together.

[0087] The upper valve plate 27 is coupled to the connecting shaft 25. The motor shaft of the rotary motor drives the upper valve plate 27 to rotate through the connecting shaft 25, thereby realizing the transmission of torque.

[0088] The second encoder is used to position the rotation angle of the upper valve plate 27.

[0089] The medicine storage tank mechanism includes: a tank body 3, a liquid level column 2, an electronic liquid level gauge 9, a pressure sensor, and a first solenoid valve 8; wherein...

[0090] The tank 3 includes: an injection port 5 for injecting anesthetic solution 20 and a discharge port for discharging anesthetic solution 20 to the outside; the injection port 5 is equipped with a medicine cap 6, and the opening and closing of the discharge port is controlled by a discharge knob 17.

[0091] The liquid level column 2 is connected to the tank 3 and is used for manual observation of the liquid level height in the tank 3;

[0092] The electronic level gauge 9 is used to monitor the liquid level height of the tank 3 in real time;

[0093] The pressure sensor is used to monitor the pressure inside tank 3 in real time;

[0094] The first solenoid valve 8 is used to control the connection between the tank 3 and the fresh gas inlet 29.

[0095] The following, in conjunction with the accompanying drawings, specifically illustrates the continuous reciprocating drug supply device provided by the present invention, and its working process:

[0096] The continuous reciprocating drug supply device provided in this embodiment includes:

[0097] This embodiment includes two main parts: a medicine storage tank mechanism and an evaporation module;

[0098] like Figures 1 to 2 As shown, the medicine storage tank mechanism includes: base 1, liquid level column 2, tank body 3, top cover 4, medicine inlet 5, medicine cap 6, first hose 7, first solenoid valve 8, electronic liquid level gauge 9, medicine discharge knob 17, plug 18, first sealing ring 19, sealing gasket 21, and second sealing ring 22.

[0099] like Figure 7 As shown in the schematic diagram of the can, can 3 is made by cutting and processing a pre-formed aluminum profile. The front of can 3 has an arc-shaped groove, and the left and right sides of can 3 have arc-shaped grooves for easy gripping; there are four threaded holes at both ends of its perimeter.

[0100] like Figure 8 As shown in the schematic diagram of the top cover, a cylindrical stepped hole is opened on the lower side of the front of the top cover 4. The inside of the cylindrical stepped hole is connected to the inside of the top cover 4 through a small hole. A circular stepped hole and a triangular mounting base are opened on the top of the top cover 4, and four stepped holes are opened around its perimeter for screw assembly. A sealing groove is opened on its back.

[0101] like Figure 3 The base diagram shows that the front end of the base 1 has a stepped hole with threads, the upper part of the front end has a medicine pool groove, the side of the front end has a medicine discharge knob hole, the lower part of the medicine discharge port has a medicine discharge port, the upper part of the rear end has a plunger pump mounting groove, and the sides of the base 1 have guide rail grooves.

[0102] The specific assembly relationship is as follows: the medicine cap 6 is equipped with a second sealing ring 22. The top cover 4 and the base 1 clamp the tank 3 in the middle and are fastened with screws. An electronic level gauge 9 is installed in the circular groove above the top cover 4 and is fixed therein with screws; the triangular mounting base above the top cover 4 is connected to the medicine inlet 5 and the first solenoid valve 8 respectively with screws. The triangle above the top cover 4 is also connected to the first hose 7 and the third hose 15 respectively through connectors. The first hose 7 is connected to the pressure sensor on the main control board through a pipeline, and the pressure sensor monitors the pressure inside the tank 3 in real time through the first hose 7; the third hose 15 is connected to the evaporation module. The opening and closing of the first solenoid valve 8 can allow fresh gas in the fresh gas inlet 29 to enter the medicine storage tank. The fresh gas inlet 29 is the fresh gas inlet of the evaporation module, so the fresh gas collected by the third hose 15 enters the medicine storage tank. The medicine discharge knob 17 is installed in the medicine discharge knob hole of the base 1. The front end of the dispensing knob 17 is equipped with a conical sealing gasket, the middle is equipped with an O-ring 19, and the rear end is threaded. By adjusting the dispensing knob 17, the anesthetic in the storage tank can be discharged through the dispensing port under the base 1.

[0103] The evaporation module includes: a first encoder 10, a linear motor 11, a rotary motor 12, a second hose 13, a rotary motor connector 14, an evaporation seat 16, a base 1, a connecting sleeve 23, an end cap 24, a connecting shaft 25, a thrust bearing 26, an upper valve plate 27, a lower valve plate 28, a fresh gas inlet 29, a plunger rod 30, a concentration regulator 31, a mixed anesthetic gas outlet 32, a sealing sleeve 33, a spring retainer 34, a second solenoid valve 35, a first flat gas inlet 36, and a second flat gas inlet 37.

[0104] like Figure 9 As shown in the schematic diagram of the evaporator base, a stepped through hole is opened at one end of the evaporator base 16, which is the plunger cavity of the plunger pump. The sealing sleeve 33 and the plunger rod 30 are placed inside this cavity. The inner ring of the sealing sleeve 33 is connected to the plunger rod 30 via a sealing ring, and the outer ring of the sealing sleeve 33 is connected to the stepped hole in the cavity of the evaporator base 16 via a sealing ring. The plunger rod 30 is connected to the extension shaft of the linear motor 11, which is connected to the evaporator base 16 via a linear motor connector and screws. The extension and retraction of the plunger rod 30 is powered by the linear motor 11. A first encoder 10 is equipped at the top of the linear motor 11, which provides real-time feedback on the distance of its movement, enabling precise control of the plunger rod 30's movement. Figure 2As shown, the plunger rod 30 and the sealing sleeve 33 divide the original cavity into two independent cavities. The volume of the two cavities can be changed in real time by controlling the up-and-down movement of the plunger rod 30 via the linear motor 11. This volume change enables the suction and pushing functions of the two cavities. The aforementioned sealing sleeve 33, plunger rod 30, linear motor 11, evaporator seat 16, connecting sleeve 23, end cap 24, etc., constitute a plunger pump. The plunger pump is installed vertically, with inlet and outlet ports at the upper and lower ends of the two cavities, respectively.

[0105] The evaporator seat 16 has a circular chamfered groove at its front end, with two flat air passages and five small holes at the bottom of the groove. The first flat air passage 36 communicates with the fresh gas inlet 29, and the second flat air passage 37 communicates with the mixed anesthetic gas outlet 32. A square boss is located between the first and second flat air passages 36 and 37, and this boss is inserted into the lower valve plate 28. Figure 10 The diagram of the lower valve plate shows a gap between it and a row of small holes at the bottom of the groove of the lower valve plate 28. The evaporation process of the anesthetic occurs when fresh gas flows into the space between the small holes and the protrusion of the evaporator seat 16. Fresh gas then mixes with the anesthetic through the fresh gas inlet 29 and the first flat gas passage 36. Due to the small gap between the protrusion and the small holes of the lower valve plate 28, the airflow velocity is very high, accelerating the evaporation rate of the anesthetic. After mixing with the anesthetic, the fresh gas passes through the second flat gas passage 37 to the mixed anesthetic gas outlet 32, achieving rapid evaporation of the anesthetic in the evaporator.

[0106] A concentration regulator 31 is installed between the O2 flat air passage hole and the mixed anesthetic gas outlet 32 ​​in the evaporator seat 16. By adjusting the concentration regulator 31, the cross-sectional area of ​​the fluid channel between the second flat air passage 37 and the mixed anesthetic gas outlet 32 ​​can be adjusted. As the concentration regulator 31 compresses the fluid channel, its cross-sectional area decreases. By adjusting the cross-sectional area of ​​the fluid channel, the concentration regulator 31 can regulate the flow rate within the fluid channel. When the cross-sectional area decreases, i.e., the fluid channel becomes narrower, the flow rate increases again. If the anesthetic liquid 20 flowing out of the small hole of the lower valve plate 28 is not completely evaporated, the residual anesthetic liquid 20 can achieve accelerated evaporation again after passing through the narrow channel adjusted by the concentration regulator 31.

[0107] Regarding the installation of the switching valve:

[0108] 1. The lower valve plate 28 is connected and installed to the evaporator base 16 via a sealing gasket, and Figure 9 The evaporator diagram shows hole, , , and Kong and Figure 10 The lower valve plate schematic diagram shows hole, , , and The holes correspond one-to-one. The connection between the evaporator seat 16 and the lower valve plate 28 is chamfered, which can realize blind insertion and positioning, so the above-mentioned 5 small holes are also blindly inserted and aligned.

[0109] like Figures 4 to 6 As shown, the connection of the five small holes in the evaporator 16 is described below:

[0110] The hole is connected to the tank body 3 of the medicine storage tank mechanism through the internal pipe of the evaporator seat 16;

[0111] The evaporator 16 is connected to the opening on the upper plunger cavity via an internal pipe;

[0112] It communicates with the lower opening of the upper plunger cavity through the internal pipe of the evaporator seat 16;

[0113] The evaporator 16 is connected to the opening on the lower plunger cavity via an internal pipe;

[0114] It communicates with the lower opening of the lower plunger cavity through the internal pipe of the evaporator seat 16;

[0115] The lower plunger cavity has an opening and is selectively connected to the tank body 3 via a second solenoid valve 35. The second solenoid valve 35 controls the opening and closing of the pipeline between the tank body 3 and the opening in the lower plunger cavity.

[0116] 2. For example Figure 2 As shown, connected sequentially above the lower valve plate 28 are the upper valve plate 27, thrust bearing 26, connecting shaft 25, spring, rotary motor connecting seat 14, rotary motor 12, and second encoder. Specifically, the spring is clamped between the rotary motor connecting seat 14 and the thrust bearing 26. The spring compression force is sequentially transmitted to the thrust bearing 26, the upper valve plate 27, and the lower valve plate 28, causing the upper valve plate 27 and the lower valve plate 28 to fit tightly together, achieving a sealing effect. For example... Figure 11 As shown, one side of the upper valve plate 27 has an I-shaped groove. The inner and outer layers of the I-shaped groove are arc-shaped grooves, and the center points of the inner and outer arc-shaped grooves are connected by a straight groove. By rotating the upper valve plate 27, the lower valve plate 28 can respond to the opening and closing of the valve port. See the detailed working process below. Figure 12As shown, the upper valve plate 27 has two slotted grooves on its side wall, and the outer contour of the connecting shaft 25 has a matching slotted flange, which cooperates with the upper valve plate to transmit torque. The inner hole of the connecting shaft 25 cooperates with the motor shaft, and the rotary motor 12 can be controlled to rotate the upper valve plate 27 at any angle. The second encoder is used to achieve precise positioning of the upper valve plate 27.

[0117] The specific working process of the above-mentioned continuous reciprocating drug supply device is described below:

[0118] 1. Loading explosives:

[0119] Open the drug cap 6 and inject the anesthetic into the storage tank through the injection port 5. The liquid level in the tank can be manually observed through the level column 2, while the electronic level gauge 9 can monitor the liquid level in real time. After filling with the anesthetic, screw the drug cap 6 back on.

[0120] 2. Initialization:

[0121] When the left and right plungers have moved to their lowest positions, the switching valve returns to the 0 position. Figure 4 Schematic diagram of the switching valve at zero position.

[0122] 3. Remove air bubbles Figure 5 Schematic diagram of drug aspiration in the upper plunger cavity:

[0123] After the anesthetic is introduced, a large amount of air remains in the piping of the vaporizer 16 and its components. This air needs to be expelled to ensure that the plunger pump delivers only anesthetic fluid. The specific working process is as follows: The second solenoid valve 35 is activated, and the rotary motor 12 is rotated clockwise by a certain angle. The arc-shaped groove of the upper valve plate 27 connects X1 and X2, while the other ports remain closed. At this time, the opening on the upper plunger chamber of the plunger pump connects to the drug reservoir through holes X1 and X2, and the opening on the lower plunger chamber connects to the drug reservoir through the activated second solenoid valve 35.

[0124] The plunger rod 30 of the control plunger pump mechanism moves up and down. When the plunger rod 30 moves upward, the volume of the upper plunger chamber decreases, and the air in the upper plunger chamber is squeezed into the storage tank. At the same time, the volume of the lower plunger chamber increases, and the liquid medicine in the storage tank is drawn into the lower plunger chamber, falling to the bottom of the lower plunger chamber by its own weight. When the plunger rod 30 moves downward, the volume of the upper plunger chamber increases, and the liquid medicine in the storage tank flows into the upper plunger chamber through the switching valve, then falls to the bottom of the upper plunger chamber by its own weight. At the same time, the volume of the lower plunger chamber decreases, and the upper part of the lower plunger chamber is filled with gas, which is squeezed into the storage tank through the second solenoid valve 35. Through the above action steps, the upper and lower plunger chambers of the plunger pump are filled with liquid medicine, and the gas is squeezed into the storage tank.

[0125] 4. Control of the anesthetic vaporization process:

[0126] After completing steps 1, 2, and 3 above, both the upper and lower plunger chambers of the plunger pump are filled with anesthetic. At this point, the plunger rod 30 is at its lowest position, the second solenoid valve 35 is closed, and the upper valve plate 27 is in the 0 position. Figure 4 Schematic diagram of the switching valve at zero position.

[0127] The above examples illustrate the use of plunger cavity aspiration and plunger cavity drug delivery. Figure 6 As shown, when a low concentration output is required, the rotary motor 12 drives the upper valve plate 27 to... Figure 6 The position is such that the inner arc-shaped groove on the lower right side of the upper valve plate 27 covers a small hole in the lower valve plate 28. At this point, pushing the plunger rod 30 at a certain speed will push out a certain amount of anesthetic. If a higher concentration of anesthetic is needed, the upper valve plate 27 can be driven to rotate further by a certain angle, so that the inner arc-shaped groove on the lower right side of the upper valve plate 27 covers more small holes, allowing a larger flow of anesthetic solution 20 to pass through more smoothly. Observation. Figure 6 It can be seen that no matter how many small holes the upper valve plate 27 covers, the X2 hole of the plunger pump is always connected to the X1 hole, and the X3 hole and the X4 hole are in a closed state. Adjusting the second solenoid valve 35 is in a closed state, so it can be realized that while the lower plunger chamber is pushing the drug, the upper plunger chamber is simultaneously drawing the drug.

[0128] Conversely, when the upper valve plate 27 rotates in the opposite direction, the action of pushing the drug into the upper plunger cavity and drawing the drug into the lower plunger cavity can also be completed. Therefore, the reciprocating motion of the plunger rod 30 can realize the function of continuous drug supply.

[0129] 5. End

[0130] When the surgery is complete and the anesthesia supply needs to be stopped, the upper valve plate 27 needs to be rotated to... Figure 5 The position is such that the second solenoid valve 35 is in the OFF state. Then, control the plunger rod 30 to move to the lowest position, then close the second solenoid valve 35, and then rotate the upper valve plate 27 to the 0 position. Figure 4 The process ends at the indicated position.

[0131] As can be seen from the above detailed description of the present invention:

[0132] 1. This invention achieves precise control and rapid response of anesthetic drug concentration. The electrically controlled vaporizer provided by this invention controls the volume of the anesthetic drug by controlling the pushing speed of the anesthetic liquid 20. Utilizing the incompressibility of liquid volume, the accuracy of the output anesthetic drug concentration is improved. The effects of temperature and air pressure on the liquid anesthetic are negligible. A linear motor precisely controls the pushing speed of the plunger pump. The output anesthetic drug evaporates immediately after mixing with fresh gas, thus obtaining a definite anesthetic drug concentration. To obtain anesthetic gas of different concentrations at different flow rates, it is only necessary to control the flow rate of fresh gas and the pushing speed of the plunger pump.

[0133] 2. This invention uses only one switching valve. By controlling the rotation angle of the switching valve in conjunction with the opening and closing of the inlet and outlet of the two plunger pump assemblies, the plunger pumps can perform the functions of suction and push. When one plunger pump assembly is suctioning, the other plunger pump assembly can push at the same time. Moreover, the assembly is simple with only one switching valve, there are fewer points that need to be sealed, and the cost is low. Therefore, the structure is simple, easy to process and produce, and easy to commercialize.

[0134] 3. This invention utilizes a plunger-type plunger pump mechanism, which enables the plunger pump mechanism to be placed vertically, and the plunger chamber is located inside the evaporator seat, which is conducive to product miniaturization. Moreover, the overall structure is more compact, lighter, reduces the installation of pipelines, and greatly improves reliability.

[0135] 4. Compared with the piston structure used in existing drug supply devices, which requires precision machining of the inner hole of the plunger pump cavity, the plunger pump mechanism adopted in this application only requires precision machining of the plunger rod. The outer surface roughness of the plunger rod is required to be high, but the outer surface of the plunger rod is an outer circle, which is very easy to machine and has low processing cost.

[0136] 5. A concentration regulator 31 is installed between the O2 flat air passage hole and the mixed anesthetic gas outlet 32 ​​in the evaporator seat 16. By adjusting the concentration regulator 31, the cross-sectional area of ​​the fluid channel between the second flat air passage 37 and the mixed anesthetic gas outlet 32 ​​can be adjusted. As the concentration regulator 31 compresses the fluid channel, its cross-sectional area decreases. By adjusting the cross-sectional area of ​​the fluid channel, the concentration regulator 31 can regulate the flow rate within the fluid channel. When the cross-sectional area decreases, i.e., the fluid channel becomes narrower, the flow rate increases again. If the anesthetic liquid 20 flowing out of the small hole of the lower valve plate 28 is not completely evaporated, the residual anesthetic liquid 20 can achieve accelerated evaporation again after passing through the narrow channel adjusted by the concentration regulator 31.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A continuous reciprocating drug supply device, comprising: The device is characterized by having a storage tank mechanism for holding anesthetic liquid (20) and an evaporation mechanism for evaporating the anesthetic liquid (20) into a gaseous state and mixing it with fresh gas to output a mixed anesthetic gas of a predetermined concentration. The device is further characterized by having a plunger pump mechanism, an upper valve plate (27), a lower valve plate (28), and a second solenoid valve (35). The evaporation mechanism includes: an evaporation seat (16); the evaporation seat (16) is vertically provided with a deep hole cavity, which serves as the main plunger cavity of the plunger pump mechanism; The main plunger cavity is provided with a sealing sleeve (33) to divide the main plunger cavity into an upper plunger cavity and a lower plunger cavity; the upper plunger cavity sidewall is provided with an upper plunger cavity opening and an upper plunger cavity lower opening; the lower plunger cavity sidewall is provided with a lower plunger cavity upper opening and a lower plunger cavity lower opening; The plunger pump mechanism is also provided with a plunger rod (30), which is connected to the extension shaft of a linear motor (11) and moves up and down in the upper and lower plunger cavities under the control of the linear motor (11). The plunger rod (30) is composed of a lower section and an upper section, wherein the cross-sectional area of ​​the lower section is larger than that of the upper section, the length is greater than the height of the lower plunger cavity, and the bottom end passes through the sealing sleeve (33) and is always in the lower plunger cavity. When the plunger rod (30) moves upward, the volume of the upper plunger cavity decreases and the volume of the lower plunger cavity increases. When the plunger rod (30) moves downward, the volume of the lower plunger cavity decreases and the volume of the upper plunger cavity increases. The upper valve plate (27) and the lower valve plate (28) are tightly fitted together to form a switching valve; the upper valve plate (27) rotates under the drive of the rotary motor (12), and together with the lower valve plate (28), provides fluid channels between the tank body (3) of the medicine storage tank mechanism and the upper opening of the upper plunger cavity, between the upper opening of the upper plunger cavity and the lower opening of the upper plunger cavity, between the lower opening of the upper plunger cavity and the evaporation chamber of the evaporation mechanism, between the tank body (3) and the upper opening of the lower plunger cavity, between the upper opening of the lower plunger cavity and the lower opening of the lower plunger cavity, and / or between the lower opening of the lower plunger cavity and the evaporation chamber of the evaporation mechanism. The opening on the lower plunger cavity is also selectively connected to the tank body (3) through a second solenoid valve (35).

2. The continuous reciprocating drug supply device according to claim 1, characterized in that, The outer ring of the sealing sleeve (33) is fixedly connected to the inner wall of the main plunger cavity through the sealing ring, and the inner ring is tightly fitted to the plunger rod (30) through the sealing ring; the linear motor (11) is equipped with a first encoder (10) for real-time feedback of the movement distance of the extension shaft of the linear motor (11) to achieve precise control of the movement of the plunger rod (30).

3. The continuous reciprocating drug supply device according to claim 1, characterized in that, The upper end of the evaporator (16) has a circular cut-edge groove. The bottom of the groove is provided with a first flat air passage (36) and a second flat air passage (37). The first flat air passage (36) is connected to the fresh gas inlet (29), and the second flat air passage (37) is connected to the mixed anesthetic gas outlet (32). An evaporator boss is provided between the first flat air passage (36) and the second flat air passage (37). The bottom inner edge of the circular cut-edge groove is circumferentially distributed. hole, , , and Hole; among which, The The hole is connected to the tank body (3) of the medicine storage tank mechanism through the first internal pipe of the evaporator seat (16); The second internal pipe of the evaporator seat (16) is connected to the opening on the upper plunger cavity; It communicates with the lower opening of the upper plunger cavity through the third internal pipe of the evaporator seat (16); The evaporator (16) communicates with the opening on the lower plunger cavity through the fourth internal pipe; The The hole is connected to the lower opening of the lower plunger cavity through the fifth internal pipe of the evaporator seat (16); The lower valve plate (28) is provided with a circular chamfered boss corresponding to the circular chamfered groove of the evaporator seat (16), for blind insertion positioning of the lower valve plate (28) and the evaporator seat (16); the circular chamfered boss is also provided with a circular chamfered boss corresponding to the circular chamfered groove of the evaporator seat (16). hole, , , and One-to-one correspondence of holes hole, , , and The lower valve plate (28) is provided with a lower valve plate groove, which covers the first flat air passage (36), the second flat air passage (37) and the evaporator seat boss, and there is a gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss; the gap between the bottom surface of the lower valve plate groove and the top surface of the evaporator seat boss serves as the evaporation chamber; the bottom of the lower valve plate groove is also provided with several through holes arranged in an arc. The upper valve plate (27) is rotated by a rotary motor (12). The upper valve plate (27) is symmetrically provided with a first I-shaped groove and a second I-shaped groove. The inner and outer grooves of the first and second I-shaped grooves are both arc-shaped, and the center points of the inner and outer grooves are connected by a straight groove. The curvature of the outer groove of the first and second I-shaped grooves is similar to that of the second I-shaped groove. hole, , and The circumferential curvature between the holes is the same; the curvature of the inner groove of the first and second I-shaped grooves is the same as the curvature of the through holes.

4. The continuous reciprocating drug supply device according to claim 3, characterized in that, The outer groove of the first I-shaped groove covers Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic liquid (20) flows from the tank body (3) of the storage tank mechanism through the Y1 hole, the evaporator seat (16), the first internal pipe, and... hole, Hole, first I-shaped groove, hole, The second internal pipe of the evaporator (16) and the opening on the upper plunger cavity flow into the upper plunger cavity of the first plunger pump group; The outer groove of the first I-shaped groove covers Kong He When drilling, the first I-shaped groove is Kong He Fluid channels are provided between the holes; The outer groove of the first I-shaped groove covers When the inner groove of the first I-shaped groove covers the through hole of the lower valve plate (28), the first I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution (20) in the upper plunger cavity passes sequentially through the lower opening of the upper plunger cavity, the third internal pipe of the evaporator seat (16), and... , The pores, the first I-shaped groove, and the through hole flow into the evaporation chamber; The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes, and the anesthetic liquid (20) flows from the tank body (3) of the storage tank mechanism through the Y1 hole, the evaporator seat (16), the first internal pipe, and... hole, Hole, second I-shaped groove, hole, The evaporator seat (16) has an internal pipe and an opening on the lower plunger cavity through which water flows into the lower plunger cavity; The outer groove of the second I-shaped groove covers Kong He When drilling, the second I-shaped groove is Kong He Fluid channels are provided between the holes; The outer groove of the second I-shaped groove covers When the inner groove of the second I-shaped groove covers the through hole of the lower valve plate (28), the second I-shaped groove is Fluid channels are provided between the through holes; the anesthetic solution (20) in the lower plunger cavity passes sequentially through the lower opening of the lower plunger cavity, the fifth internal pipe of the evaporator seat (16), and... , The water flows into the evaporation chamber through the holes, the second I-shaped groove, and the through hole.

5. The continuous reciprocating drug supply device according to claim 3, characterized in that, The first flat airway (36) is connected to the fresh gas inlet (29), and the second flat airway (37) is connected to the mixed anesthetic gas outlet (32). The anesthetic liquid (20) in the upper or lower plunger cavity flows into the gap between the lower valve plate groove and the evaporator seat boss through the through hole and evaporates. After evaporation, the anesthetic gas is mixed with the fresh gas flowing in through the fresh gas inlet (29) and then output through the mixed anesthetic gas outlet (32).

6. The continuous reciprocating drug supply device according to claim 3, characterized in that, A concentration regulator (31) is provided between the second flat airway opening (37) and the mixed anesthetic gas outlet (32) to adjust the cross-sectional area of ​​the fluid channel between the second flat airway opening (37) and the mixed anesthetic gas outlet (32).

7. The continuous reciprocating drug supply device according to claim 3, characterized in that, Above the lower valve plate (28), an upper valve plate (27), a thrust bearing (26), a connecting shaft (25), a spring, a rotary motor connecting seat (14), a rotary motor (12), and a second encoder are arranged in sequence; wherein, The spring is held between the rotary motor connecting seat (14) and the thrust bearing (26). The spring compression force is transmitted sequentially to the thrust bearing (26), the upper valve plate (27) and the lower valve plate (28), so that the upper valve plate (27) and the lower valve plate (28) fit tightly together. The upper valve plate (27) is coupled to the connecting shaft (25), and the motor shaft of the rotary motor drives the upper valve plate (27) to rotate through the connecting shaft (25) to realize the transmission of torque; The second encoder is used to position the rotation angle of the upper valve plate (27).

8. The continuous reciprocating drug supply device according to claim 1, characterized in that, The medicine storage tank mechanism includes: a tank body (3), a liquid level column (2), an electronic liquid level gauge (9), a pressure sensor, and a first solenoid valve (8); wherein, The tank (3) includes: an injection port (5) for injecting anesthetic liquid (20) and a discharge port for discharging anesthetic liquid (20) to the outside; the injection port (5) is equipped with a medicine cap (6), and the opening and closing of the discharge port is controlled by a discharge knob (17); The liquid level column (2) is connected to the tank (3) and is used for manual observation of the liquid level height in the tank (3); The electronic level gauge (9) is used to monitor the liquid level height of the tank (3) in real time; The pressure sensor is used to monitor the pressure inside the tank (3) in real time; The first solenoid valve (8) is used to control the connection between the tank (3) and the fresh gas inlet (29).

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