Vacuum system and transdermal drug delivery therapeutic apparatus

Abstract

The utility model discloses a vacuum system and a transdermal drug delivery therapeutic apparatus. The vacuum system comprises a steaming and applying disc, a buffer bottle and a vacuum pump. Wherein the steaming and applying disc comprises a central cavity and an annular cavity which are isolated from each other, the annular cavity is formed in the outer side of the central cavity in the circumferential direction of the central cavity, a closed buffering cavity is formed in the buffering bottle, and an air inlet pipe and an air outlet pipe which are communicated with the buffering cavity are arranged on the buffering bottle; the air inlet pipe communicates with an air outlet of the annular cavity through a first ventilation pipeline, the air outlet pipe communicates with an air inlet of the vacuum pump through a second ventilation pipeline, and under the negative pressure effect of the vacuum pump, gas-liquid mixed airflow in the steaming and applying disc enters the buffer cavity through the first ventilation pipeline to be subjected to gas-liquid separation; and the separated gas enters the vacuum pump through the second ventilation pipeline and is discharged. The problem that in the prior art, when the steaming and applying disc is used, due to misoperation, liquid in the steaming and applying disc enters the vacuum pump under the suction action of the vacuum pump, and the vacuum pump breaks down is solved.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to a vacuum system and a transdermal drug delivery therapeutic device. Background Art

[0002] Transdermal drug delivery is the process of introducing drugs into the body through skin penetration. During use, the drugs penetrate the skin and enter the diseased parts or acupuncture points of the human body to exert their effects. This can avoid the damage of oral drugs to the gastrointestinal tract and is an effective method for treating diseases. In the related art, the steaming plate is adsorbed and fixed on the drug-delivered skin, and the drug is delivered through the steaming plate. The adsorption of the steaming plate is mainly achieved by extracting the air in the steaming plate with a vacuum pump to generate negative pressure.

[0003] In the related art, when using the steaming plate, there is an improper operation of the steaming plate, that is, when the patient is sitting on the chair for treatment, the annular cavity vent of the steaming plate is placed at the lowest part facing the chair, and when the vacuum system is started, excess liquid enters the vacuum pipeline from the annular cavity vent. In addition, when too much water is applied to the skin sealing surface of the steaming plate in contact with the human body or too much liquid medicine is added to the central cavity of the steaming plate, with the suction of the vacuum pump, the excess liquid will also enter the vacuum pump along with the gas, resulting in an operational failure. Utility Model Content

[0004] The main purpose of the present application is to provide a vacuum system and a transdermal drug delivery therapeutic device to solve the problem in the related art that when using a steaming plate, improper operation may cause the liquid in the steaming plate to enter the vacuum pump along with the suction action of the vacuum pump, causing the vacuum pump to malfunction.

[0005] In order to achieve the above-mentioned purpose, the present application provides a vacuum system, which includes: a steaming plate, a buffer bottle and a vacuum pump; wherein:

[0006] The steaming plate comprises a central cavity and an annular cavity which are isolated from each other, the annular cavity is opened on the outside of the central cavity around the circumference of the central cavity, the annular cavity is configured to be adsorbed and fixed on the medication site under the action of negative pressure, the buffer bottle has a closed buffer cavity, and the buffer bottle is provided with an air inlet pipe and an air outlet pipe which are connected with the buffer cavity;

[0007] The air inlet pipe is connected to the air outlet of the annular cavity through a first ventilation pipeline, and the air outlet pipe is connected to the air inlet of the vacuum pump through a second ventilation pipeline. Under the negative pressure of the vacuum pump, the gas-liquid mixture in the steaming plate flows through the first ventilation pipeline into the buffer cavity for gas-liquid separation, and the separated gas enters the vacuum pump through the second ventilation pipeline and is discharged.

[0008] Furthermore, it also includes a one-way valve, and the second ventilation pipeline includes a ventilation front section and a ventilation tail section, the two ends of the ventilation front section are respectively connected to the outlet pipe and the air inlet of the one-way valve, and the two ends of the ventilation tail section are respectively connected to the outlet of the one-way valve and the air inlet of the vacuum pump.

[0009] Furthermore, the buffer bottle comprises a bottle body and a bottle cap, wherein the bottle cap is detachably fixed to the bottle body, a sealing structure is provided at the connection between the bottle cap and the bottle body, and the air inlet pipe and the air outlet pipe are both provided on the bottle cap.

[0010] Furthermore, a partition is provided in the buffer bottle, the upper end of the partition is fixedly connected to the inner side of the bottle cap, and the lower end of the partition and the bottom of the bottle body are provided with a first gas passage;

[0011] The partition divides the buffer cavity into a first cavity and a second cavity in the radial direction, and the first cavity and the second cavity are connected through the first gas passage;

[0012] The air inlet pipe corresponds to the first cavity, and the air outlet pipe corresponds to the second cavity.

[0013] Furthermore, the air inlet pipe comprises an outer pipe section and an inner pipe section which are connected, wherein the outer pipe section is located on the outer side of the bottle cap, the inner pipe section is located on the inner side of the bottle cap and extends toward the bottom of the bottle body, and a second air passage communicating with the buffer cavity is provided at the lower end of the inner pipe section;

[0014] The height of the lower end of the air outlet pipe is higher than the height of the lower end of the inner pipe section.

[0015] Furthermore, a communicating expansion pipe is provided at the lower end of the inner pipe section, the inner diameter of the expansion pipe is larger than the inner diameter of the inner pipe section, and the second air passage is located at the lower end of the expansion pipe.

[0016] Furthermore, the expansion tube is configured to be cylindrical or conical. When the expansion tube is configured to be conical, the cross-sectional area of ​​the expansion tube gradually increases from top to bottom.

[0017] Furthermore, a mask is provided at the lower end of the inner tube section, and the mask has a shielding portion extending toward the inner wall of the bottle body, and the buffer cavity is axially divided into a third cavity and a fourth cavity by the mask, and the third cavity and the fourth cavity are connected through a third air passage, and the air outlet pipe corresponds to the third cavity.

[0018] Furthermore, a third air passage connecting the third cavity and the fourth cavity is provided between the edge of the shielding portion and the inner wall of the bottle body.

[0019] Furthermore, the edge of the shielding portion abuts against the inner wall of the bottle body, and a plurality of vent holes are provided on the shielding portion to form a third air passage connecting the third cavity and the fourth cavity.

[0020] Furthermore, the vent hole is a groove formed on the peripheral edge of the shielding portion, and / or the vent hole is a straight hole formed on the shielding portion.

[0021] Furthermore, a vent cylinder is provided on the shielding portion, and the vent cylinder serves as a third air passage connecting the third cavity and the fourth cavity. The lower end of the vent cylinder extends out of the lower end surface of the shielding portion, and the position of the vent cylinder corresponds to the position of the outlet pipe.

[0022] Furthermore, the shielding portion is configured as a flat structure extending in the radial direction or the shielding portion is a conical structure. When the shielding portion is a conical structure, the cross-sectional area of ​​the shielding portion gradually increases from top to bottom.

[0023] According to another aspect of the present application, a transdermal drug delivery therapeutic apparatus is provided, comprising the above-mentioned vacuum system.

[0024] In the embodiment of the present application, a steaming plate, a buffer bottle and a vacuum pump are provided; wherein the steaming plate comprises a central cavity and an annular cavity which are isolated from each other, the annular cavity is arranged on the outer side of the central cavity around the circumference of the central cavity, the annular cavity is arranged to be adsorbed and fixed on the administration site under the action of negative pressure, the buffer bottle has a closed buffer cavity, the buffer bottle is provided with an air inlet pipe and an air outlet pipe which are connected with the buffer cavity; the air inlet pipe is connected with the air outlet of the annular cavity through a first ventilation line, the air outlet pipe is connected with the air inlet of the vacuum pump through a second ventilation line, on the one hand, the gas-liquid mixed gas in the steaming plate is achieved under the action of the negative pressure of the vacuum pump. The liquid flows through the first ventilation pipeline and enters the buffer cavity for gas-liquid separation. The separated gas enters the vacuum pump through the second ventilation pipeline and is discharged. Under the action of the buffer bottle, the liquid is not easy to enter the vacuum pump through the second ventilation pipeline, thereby achieving the technical effect of using the buffer bottle to intercept the excess liquid extracted from the first ventilation pipeline, so that it will not enter the vacuum pump to endanger the operation of the vacuum system, and improve the use stability of the vacuum system, thereby solving the problem in the related art that when using the steaming plate, the liquid in the steaming plate will enter the vacuum pump with the suction action of the vacuum pump due to improper operation, causing the vacuum pump to malfunction;

[0025] On the other hand, since the buffer cavity in the buffer bottle has a certain volume, when the vacuum pump is started for the first time, the buffer cavity can also be used to buffer the gas suction process, so that the process of the steaming plate being adsorbed and fixed on the skin is smooth, thereby improving the patient's comfort. At the same time, the deformation process of the steaming plate under negative pressure can be slowed down, thereby reducing material fatigue and increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a vacuum system according to an embodiment of the present application;

[0028] Figure 2 is a schematic structural diagram of a buffer bottle with a partition according to an embodiment of the present application;

[0029] Figure 3 yes Figure 2 AA cross-sectional structure diagram;

[0030] Figure 4 is a schematic structural diagram of a buffer bottle in which an air intake pipe includes an outer pipe section and an inner pipe section according to an embodiment of the present application;

[0031] Figure 5 is a schematic structural diagram of a buffer bottle with an expansion tube according to an embodiment of the present application;

[0032] Figure 6 is a schematic structural diagram of a buffer bottle with another expansion tube according to an embodiment of the present application;

[0033] Figure 7 is a schematic structural diagram of a buffer bottle with a mask according to an embodiment of the present application;

[0034] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure of the middle BB;

[0035] Fig. 9 is a schematic structural diagram of a buffer bottle with another mask according to an embodiment of the present application;

[0036] Fig.10 yes Fig. 9 Schematic diagram of the cross-sectional structure of the CC;

[0037] Fig.11 is a schematic structural diagram of a buffer bottle with another mask according to an embodiment of the present application;

[0038] Fig.12 yes Fig.11 Schematic diagram of the cross-sectional structure of DD;

[0039] Fig.13 is a schematic structural diagram of a buffer bottle with another mask according to an embodiment of the present application;

[0040] Fig.14 is a schematic structural diagram of a buffer bottle with another mask according to an embodiment of the present application;

[0041] Fig.15 is a schematic structural diagram of a buffer bottle with another mask according to an embodiment of the present application;

[0042] Fig.16 is a structural schematic diagram of the sealing structure of the bottle cap and the bottle body according to an embodiment of the present application;

[0043] Fig.17 yes Fig.16 A schematic diagram of the enlarged structure of the local I in the middle;

[0044] Fig.18 is a structural schematic diagram of another sealing structure of a bottle cap and a bottle body according to an embodiment of the present application;

[0045] Fig.19 yes Fig.17 A schematic diagram of the enlarged structure of the middle part II;

[0046] Fig. 20 is a schematic structural diagram of a sealing ring according to an embodiment of the present application;

[0047] Fig.21 According to the embodiment of the present application Fig. 20 The structural schematic diagram of the corresponding buffer bottle;

[0048] Fig. 22 is a schematic structural diagram of another sealing ring according to an embodiment of the present application;

[0049] Fig.23 According to the embodiment of the present application Fig. 22 The structural diagram of the corresponding bottle cap;

[0050] Fig.24 According to the embodiment of the present application Fig. 22 A corresponding schematic diagram of the structure of another bottle cap;

[0051] Fig.25 is a schematic structural diagram of another sealing ring according to an embodiment of the present application;

[0052] Fig.26 According to the embodiment of the present application Fig.25 The structural diagram of the corresponding bottle cap;

[0053] Fig. 27 is a structural schematic diagram of another sealing structure of a bottle cap and a bottle body according to an embodiment of the present application;

[0054] Fig.28 yes Fig. 27 A schematic diagram of the enlarged structure of the middle part III;

[0055] Among them, 1 is a steaming plate, 101 is an annular cavity, 102 is a central cavity, 2 is a first ventilation pipeline, 201 is a first pipe section, 202 is a three-way valve, 203 is a second pipe section, 204 is a third pipe section, 3 is a pressure switch, 4 is a buffer bottle, 401 is a bottle body, 402 is a bottle cover, 403 is a buffer cavity, 4031 is a first cavity, 4032 is a second cavity, 4033 is a first air passage, 4034 is a second air passage, 4035 is a third air passage, 4036 is a third cavity, 4037 is a fourth cavity, 5 air inlet pipe, 501 outer pipe section, 502 inner pipe section, 503 expansion pipe, 6 air outlet pipe, 7 second ventilation pipeline, 701 ventilation front section, 702 ventilation rear section, 8 one-way valve, 9 vacuum pump, 10 partition, 11 cover, 110 shielding part, 111 ventilation hole, 112 ventilation cylinder, 12 embedded groove, 120 first groove body, 121 second groove body, 13 sealing ring, 131 second embedded part, 132 sealing surface, 133 first embedded part, 14 flange top, 15 flange base. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0058] In this application, the terms "upper", "lower", "inner", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0059] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0060] In addition, the terms "disposed", "provided with", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0061] In addition, the term "plurality" shall mean two or more.

[0062] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0063] In the related art, there is an improper operation of the steaming plate, that is, when the patient is sitting on the chair for treatment, the annular cavity vent of the steaming plate is placed at the lowest part facing the chair, and when the vacuum system is started, excess liquid enters the vacuum pipeline from the annular cavity vent. In addition, when too much water is applied to the skin sealing surface of the steaming plate that contacts the human body or too much liquid medicine is added to the central cavity of the steaming plate, with the suction of the vacuum pump, the excess liquid will also enter the vacuum pump along with the gas, resulting in an operational failure.

[0064] To solve the above technical problems, Figure 1 As shown, the embodiment of the present application provides a vacuum system, which includes: a steaming plate 1, a buffer bottle 4 and a vacuum pump 9; wherein,

[0065] The steaming plate 1 comprises a central cavity 102 and an annular cavity 101 which are isolated from each other. The annular cavity 101 is arranged on the outer side of the central cavity 102 in the circumferential direction of the central cavity 102. The annular cavity 101 is arranged to be adsorbed and fixed on the administration site under the action of negative pressure. The buffer bottle 4 has a closed buffer cavity 403. The buffer bottle 4 is provided with an air inlet pipe 5 and an air outlet pipe 6 which are connected with the buffer cavity 403.

[0066] The air inlet pipe 5 is connected to the air outlet of the annular cavity 101 through the first air vent pipe 2, and the air outlet pipe 6 is connected to the air inlet of the vacuum pump 9 through the second air vent pipe 7. Under the negative pressure of the vacuum pump 9, the gas-liquid mixed gas in the steaming plate 1 flows through the first air vent pipe 2 into the buffer cavity 403 for gas-liquid separation, and the separated gas enters the vacuum pump 9 through the second air vent pipe 7 and is discharged.

[0067] In this embodiment, when the transdermal drug delivery therapeutic device is in use, the steaming plate 1, the first ventilation line 2, the buffer bottle 4, the second ventilation line 7 and the vacuum pump 9 are in a state of being connected in sequence. The gas in the steaming plate 1 is extracted by the vacuum pump 9, and the gas enters the vacuum pump 9 and is discharged along the first ventilation line 2, the buffer bottle 4 and the second ventilation line 7, so that the steaming plate 1 can be adsorbed and fixed on the human skin under the action of negative pressure, so as to facilitate subsequent transdermal drug delivery treatment. Since there is too much liquid in the steaming plate 1 due to improper operation, part of the liquid will enter the first ventilation line 2 with the gas under the negative pressure of the vacuum pump 9, and then enter the buffer cavity 403 through the air inlet pipe 5 of the buffer bottle 4. Since the buffer cavity 403 is a cavity with a certain volume, its volume is significantly larger than the volume of the first ventilation line 2, so that the flow rate of the liquid entering the buffer cavity 403 is greatly reduced. The liquid with reduced flow rate will be separated from the gas in the buffer cavity 403 under the action of its own gravity. The separated liquid is stored in the buffer cavity 403, and the separated gas enters the second ventilation pipeline 7 through the outlet pipe 6 on the buffer bottle 4, and then is discharged through the vacuum pump 9.

[0068] On the one hand, this embodiment achieves the purpose that the gas-liquid mixed gas in the steaming plate 1 flows through the first ventilation pipeline 2 into the buffer cavity 403 for gas-liquid separation under the negative pressure of the vacuum pump 9, and the separated gas enters the vacuum pump 9 through the second ventilation pipeline 7 and is discharged, and the liquid is not easy to enter the vacuum pump 9 through the second ventilation pipeline 7 under the action of the buffer bottle 4, thereby achieving the technical effect of using the buffer bottle 4 to intercept the excess liquid extracted from the first ventilation pipeline 2, so that it will not enter the vacuum pump 9 to endanger the operation of the vacuum system, and improve the use stability of the vacuum system, thereby solving the problem in the related art that when using the steaming plate, the liquid in the steaming plate 1 will enter the vacuum pump 9 with the suction effect of the vacuum pump 9 due to improper operation, causing the vacuum pump 9 to malfunction;

[0069] On the other hand, since the buffer cavity 403 in the buffer bottle 4 has a certain volume, when the vacuum pump 9 is started for the first time, the buffer cavity 403 can also be used to buffer the gas suction process, so that the process of the steaming plate 1 being adsorbed and fixed on the skin is smooth, thereby improving the patient's comfort. At the same time, the deformation process of the steaming plate under negative pressure can be slowed down, reducing material fatigue and increasing service life.

[0070] It should be noted that the gas-liquid separation process of the buffer bottle 4 can be achieved through the larger volume space of the buffer cavity 403. On this basis, the buffer cavity 403 can also be additionally improved to further improve the gas source separation effect. For example, a baffle structure can be arranged in the buffer cavity 403, and the baffle structure can be used to change the flow direction of the gas-liquid mixed airflow entering the buffer cavity 403. The kinetic energy of the liquid in the mixed airflow is greatly reduced after colliding with the baffle structure, so that it can better utilize its own gravity to separate from the gas. This embodiment does not limit the specific baffle structure, and it can be designed according to actual needs.

[0071] Based on the above embodiment, this embodiment further illustrates the structure of the steaming plate 1. Specifically, Figure 1 As shown, the steaming plate 1 includes a central cavity 102 and an annular cavity 101 located outside the central cavity 102, and the central cavity 102 and the annular cavity 101 are separated by a spacer ring. The air outlet on the steaming plate 1 is opened on the annular cavity 101, and the first end of the first ventilation pipeline 2 is connected to the annular cavity 101. Under the action of the vacuum pump 9, negative pressure is generated in the annular cavity 101, and the steaming plate 1 and the human skin are adsorbed and fixed, and the central cavity 102 is used for subsequent drug administration treatment.

[0072] In one embodiment, Figure 1 As shown, the first ventilation pipeline 2 includes a first pipe section 201, a second pipe section 203 and a third pipe section 204, and the vacuum system also includes a three-way valve 202 and a pressure switch 3. The first pipe section 201, the second pipe section 203 and the third pipe section 204 are respectively connected to the three-way of the three-way valve 202, the first pipe section 201 is connected to the air outlet of the steaming plate 1, the second pipe section 203 is connected to the pressure switch 3, and the third pipe section 204 is connected to the air inlet pipe 5 on the buffer bottle 4, and the pressure of the entire vacuum system can be controlled by the pressure switch 3.

[0073] In order to enable the vacuum pump 9 to generate a stable negative pressure, Figure 1 As shown, the vacuum system in this embodiment also includes a one-way valve 8, and the second ventilation pipeline 7 includes a ventilation front section 701 and a ventilation tail section 702, the two ends of the ventilation front section 701 are respectively connected to the outlet pipe 6 and the air inlet of the one-way valve 8, and the two ends of the ventilation tail section 702 are respectively connected to the outlet of the one-way valve 8 and the air inlet of the vacuum pump 9.

[0074] Specifically, it should be noted that, on the one hand, the one-way valve 8 allows the gas to only flow into the vacuum pump 9 in one direction through the internal valve sheet, so that the vacuum system can form a stable negative pressure. On the other hand, when the buffer bottle 4 is not arranged in the vacuum system or the buffer bottle 4 is not at the front end of the one-way valve 8, the volume of the pipeline in the entire vacuum system is small. Once a tiny gap appears between the steaming plate 1 and the human skin due to the patient's movement during the treatment process, the pressure in the vacuum system decreases significantly, resulting in the inability of the steaming plate 1 to be stably adsorbed and fixed on the skin. When the buffer bottle 4 is arranged in the vacuum system and the buffer bottle 4 is located at the front end of the one-way valve 8, the buffer cavity 403 in the buffer bottle 4 has a large volume, so the pipeline volume of the entire vacuum system is increased. When a gap appears between the steaming plate 1 and the skin, the buffer cavity 403 in the buffer bottle 4 in a negative pressure state can compensate for the reduced pressure, so that the pressure reduction of the entire vacuum system is reduced.

[0075] In one embodiment of the buffer bottle 4, since the inhaled liquid is stored in the buffer bottle 4, the buffer bottle 4 needs to be cleaned after the treatment. Figure 2 As shown, the buffer bottle 4 in this embodiment includes a bottle body 401 and a bottle cap 402. The bottle cap 402 is detachably fixed to the bottle body 401. The specific connection method can be a threaded connection or a snap connection.

[0076] In addition, it should be noted that in this embodiment, the air inlet pipe 5 and the air outlet pipe 6 are both arranged on the bottle cap 402, and the air inlet pipe 5 and the first ventilation pipeline 2 are in a detachable connection relationship, and the air outlet pipe 6 and the second ventilation pipeline 7 are also in a detachable connection relationship. Specifically, the first ventilation pipeline 2 can be sleeved and fixed on the air inlet pipe 5 with an interference fit, and the second ventilation pipeline 7 can be sleeved and fixed on the air outlet pipe 6 with an interference fit. When disassembling and cleaning, first remove the first ventilation pipeline 2 and the second ventilation pipeline 7, then remove the bottle cap 402 from the bottle body 401, and then cooperate with the corresponding cleaning equipment for cleaning.

[0077] In one embodiment of the buffer bottle 4, Figure 2 and Figure 3 As shown, a partition 10 is provided in the buffer bottle 4, the upper end of the partition 10 is fixedly connected to the inner side of the bottle cap 402, and the lower end of the partition 10 and the bottom of the bottle body 401 are provided with a first gas passage 4033;

[0078] The partition 10 divides the buffer cavity 403 into a first cavity 4031 and a second cavity 4032 along the radial direction. The first cavity 4031 and the second cavity 4032 are connected through a first gas passage 4033.

[0079] The air inlet pipe 5 corresponds to the first cavity 4031 , and the air outlet pipe 6 corresponds to the second cavity 4032 .

[0080] Specifically, it should be noted that the buffer cavity 403 is divided into a first cavity 4031 and a second cavity 4032 distributed on the left and right by a partition 10 having a certain length, and the ends of the first cavity 4031 and the second cavity 4032 away from the bottle cap 402 (i.e., away from the air inlet pipe 5 and the air outlet pipe 6) are connected through a first air passage 4033. In one embodiment of forming the first air passage 4033, it can be formed by providing a certain distance between the lower end of the partition 10 and the bottom of the bottle body 401; in another embodiment, the lower end of the partition 10 can be against the bottom of the bottle body 401, and a plurality of through holes are provided at the lower end of the partition 10 to form the first air passage 4033. It should be noted that the above description of the specific formation form of the first air passage 4033 is not restrictive.

[0081] In this embodiment, by setting the partition 10, the gas-liquid mixed airflow needs to flow downward along the first cavity 4031 after entering the first cavity 4031 through the air inlet pipe 5, then bypass the partition 10 through the first air passage 4033 and flow upward along the second cavity 4032, and finally be discharged through the air outlet pipe 6. In this process, since the flow direction of the gas-liquid mixed airflow is changed, the kinetic energy of the liquid in the gas-liquid mixed airflow is greatly reduced, so that the gas-liquid separation is more sufficient. In addition, since the partition 10 is fixed to the inner side of the bottle cap 402, and the air inlet pipe 5 and the air outlet pipe 6 are also installed on the bottle cap 402, during the process of installing the bottle cap 402 to the bottle body 401, no matter where the bottle cap 402 stops, it can be ensured that the airflow entering from the air inlet pipe 5 will not short-circuit with the air outlet pipe 6. Furthermore, since the partition 10 is installed on the bottle cap 402, the partition 10 will be separated from the bottle body 401 after the bottle cap 402 is removed, and the inner wall of the bottle body 401 can be kept smooth, reducing the cleaning obstacle.

[0082] In another embodiment of the buffer bottle 4, as Figure 4 As shown, the air inlet pipe 5 includes an outer pipe section 501 and an inner pipe section 502 which are connected. The outer pipe section 501 is located on the outer side of the bottle cap 402, and the inner pipe section 502 is located on the inner side of the bottle cap 402 and extends toward the bottom of the bottle body 401. The lower end of the inner pipe section 502 is provided with a second air passage 4034 which is connected with the buffer cavity 403.

[0083] The lower end of the air outlet pipe 6 is located at a height higher than the lower end of the inner pipe section 502 .

[0084] Specifically, it should be noted that the air inlet pipe 5 includes an outer pipe section 501 and an inner pipe section 502, wherein the outer pipe section 501 is used to connect with the first ventilation pipeline 2, and the inner pipe section 502 extends into the buffer cavity 403. The arrangement of the inner pipe section 502 greatly increases the length of the air inlet pipe 5, so that the length of the air inlet pipe 5 is significantly greater than the length of the air outlet pipe 6. The gas-liquid mixed airflow entering through the outer pipe section 501 needs to flow through the inner pipe section 502 and then enter the buffer cavity 403 through the second air passage 4034, and finally be discharged through the air outlet pipe 6. Since the inner pipe section 502 has a certain length, the gas-liquid mixed airflow flowing out of the inner pipe section 502 needs to be deflected upwards before it can be discharged through the air outlet pipe 6. In the process of the mixture flowing through the inner pipe section 502, the friction between the liquid and the inner pipe section 502 reduces the kinetic energy of the liquid. After flowing out of the inner pipe section 502, the kinetic energy of the liquid is further reduced because the flow direction needs to be changed, thereby making the gas-liquid separation more sufficient.

[0085] In this embodiment, the second gas passage 4034 also has different formation forms, such as Figure 4 As shown, in one embodiment, there is a gap between the lower end of the inner tube section 502 and the bottom of the bottle body 401, thereby forming a second gas passage 4034. In another embodiment, the lower end of the inner tube section 502 abuts against the bottom of the bottle body 401, and a through hole is opened on the side of the inner tube section 502 to form the second gas passage 4034. In order to facilitate the storage of the separated liquid, it is preferred that there is a gap between the lower end of the inner tube section 502 and the bottom of the bottle body 401, and the second gas passage 4034 is formed by using the gap.

[0086] Based on the above implementation, Figure 5 and Figure 6 As shown, in this embodiment, a communicating expansion pipe 503 is disposed at the lower end of the inner pipe section 502 , the inner diameter of the expansion pipe 503 is larger than the inner diameter of the inner pipe section 502 , and the second air passage 4034 is located at the lower end of the expansion pipe 503 .

[0087] In this embodiment, after the expansion tube 503 is added to the lower end of the inner tube section 502, after the mixed airflow flows out of the inner tube section 502, since the diameter of the expansion tube 503 is larger than the diameter of the inner tube section 502, the airflow velocity after entering the expansion tube 503 decreases, and the droplets in the airflow are more easily intercepted and have no power to enter the outlet pipe 6 with the airflow, thereby further improving the gas-liquid separation effect. In addition, it should be noted that the inner tube section 502 and the expansion tube 503 can be integrally formed, or the expansion tube 503 can be installed as a separate component at the lower end of the inner tube section 502, and the specific installation method can be sleeve fixing. After adding the expansion tube 503, there can be a gap between the lower end of the expansion tube 503 and the bottom of the bottle body 401, thereby forming a second air passage 4034.

[0088] In a specific implementation of the expansion tube 503, as Figure 5 The expansion tube 503 is configured as a cylinder or as Figure 6 The expansion tube 503 is shown as being configured to be tapered. When the expansion tube 503 is configured to be tapered, the cross-sectional area of ​​the expansion tube 503 gradually increases from top to bottom.

[0089] Since the inner tube section 502 has a certain length, its lower end is relatively closer to the bottom of the bottle body 401. Therefore, the gas-liquid mixed airflow discharged through the inner tube section 502 will splash after impacting the bottom of the bottle body 401. In order to prevent the splashed liquid from entering the air outlet pipe 6, in this embodiment, on the basis of the embodiment in which the air inlet pipe 5 includes the outer tube section 501 and the inner tube section 502, as shown in FIG. Figure 7 As shown, a mask 11 is provided at the lower end of the inner tube section 502, and the mask 11 has a shielding portion 110 extending toward the inner wall of the bottle body 401. The buffer cavity 403 is axially divided into a third cavity 4036 and a fourth cavity 4037 by the mask 11. The third cavity 4036 and the fourth cavity 4037 are connected through the third air passage 4035, and the air outlet pipe 6 corresponds to the third cavity 4036.

[0090] Specifically, it should be noted that after the shield 11 is added, the liquid splashed from the lower end of the inner tube section 502 will be blocked by the shielding portion 110, and most of the liquid droplets can be intercepted by the shielding portion 110, while the gas flows upward through the third gas passage 4035 and finally flows out through the gas outlet pipe 6. In this embodiment, the shield 11 and the inner tube section 502 can be integrally formed, or can be installed as a separate component at the lower end of the inner tube section 502, and the specific installation method can be sleeve fixing.

[0091] In one embodiment of forming the third gas passage 4035, as shown in FIG. Figure 7 and Figure 8 As shown, there is a distance between the edge of the shielding portion 110 and the inner wall of the bottle body 401 , and the third air passage 4035 connecting the third cavity 4036 and the fourth cavity 4037 is formed by utilizing the distance.

[0092] In another embodiment of forming the third gas passage 4035, as shown in FIG. Figures 9 to 12 As shown, the edge of the shielding portion 110 abuts against the inner wall of the bottle body 401, and a plurality of vent holes 111 are provided on the shielding portion 110 to form a third gas passage 4035 connecting the third cavity 4036 and the fourth cavity 4037. To increase the gas flow, the vent holes 111 can be provided in plurality and distributed along the circumference of the shielding portion 110.

[0093] In one embodiment of the vent hole 111, Fig. 9 and Fig.10As shown, the vent hole 111 is a groove formed on the peripheral edge of the shielding portion 110, and the groove may be a semicircular groove or a rectangular groove. Fig.11 and Fig.12 As shown, the vent hole 111 is a straight hole provided on the shielding portion 110. When a straight hole is provided, a plurality of straight holes can be concentrated and distributed on the portion of the shielding portion 110 corresponding to the air outlet pipe 6. It can be understood that a groove can be provided on the circumferential edge of the shielding portion 110, and a straight hole can be provided on the shielding portion 110 at the same time, and the straight hole and the groove can form the third air passage 4035 together.

[0094] In one embodiment of the vent hole 111, Fig.15 As shown, a vent cylinder 112 is provided on the shielding portion 110, and the vent cylinder 112 serves as a third air passage 4035 connecting the third cavity 4036 and the fourth cavity 4037. The lower end of the vent cylinder 112 extends out of the lower end surface of the shielding portion 110, and the position of the vent cylinder 112 corresponds to the position of the outlet pipe 6.

[0095] Specifically, it should be noted that the length of the vent 112 in this embodiment is longer than the length of the straight hole or groove opened on the shielding portion 110 in the above-mentioned embodiment. Therefore, when the gas-liquid mixed airflow enters the vent 112, the friction area with the liquid is increased, which is more conducive to the separation of the liquid. The vent 112 can be integrally formed with the shielding portion 110, or installed on the shielding portion 110 as an independent component. When used as an independent component, it is necessary to open a mounting hole on the shielding portion 110, and the upper end of the vent 112 is fixedly connected to the mounting hole.

[0096] In one embodiment of the shielding portion 110, as Figure 7 , Fig. 9 and Fig.11 As shown, the shielding portion 110 is configured as a flat structure extending in the radial direction, that is, the shielding portion 110 extends in the horizontal direction. Figures 13 to 15 As shown, the shielding portion 110 is a conical structure. When the shielding portion 110 is a conical structure, the cross-sectional area of ​​the shielding portion 110 gradually increases from top to bottom. Compared with the flat structure, the shielding portion 110 with a conical structure can better reduce the speed of the mixed airflow entering the air outlet pipe 6 and better intercept the droplets in the mixed airflow.

[0097] Since the buffer bottle 4 needs to be applied to the vacuum system, it is necessary to ensure sufficient sealing. For this reason, in this embodiment, a sealing structure is provided at the connection between the bottle cap 402 and the bottle body 401. In one embodiment, the sealing structure can be achieved by an interference fit between the bottle cap 402 and the bottle body 401. In another embodiment, the sealing structure can be achieved by an additionally arranged sealing ring 13 and a threaded connection between the bottle cap 402 and the bottle body 401. It should be noted that the above description of the connection structure and the sealing structure of the bottle cap 402 and the bottle body 401 is not restrictive and can be designed according to actual needs.

[0098] In an embodiment in which the sealing structure includes a sealing ring 13, to facilitate the installation of the sealing ring 13, as shown in FIG. Fig.16 As shown, in this embodiment, an annular embedding groove 12 is provided inside the bottle cap 402, and the sealing ring 13 is at least partially embedded and fixed in the embedding groove 12, so that the sealing ring 13 is not easy to be separated from the bottle cap 402 during the disassembly and cleaning of the bottle cap 402, so as to facilitate the installation and sealing between the bottle cap 402 and the bottle body 401. In order to improve the tightness of the connection between the sealing ring 13 and the embedding groove 12, the sealing ring 13 is made of a flexible material, and an interference fit is adopted between the sealing ring 13 and the embedding groove 12.

[0099] Based on this embodiment, Fig.17 As shown, the embedding groove 12 is provided with two parts distributed along the axial direction, namely, a first groove body 120 and a second groove body 121. The first groove body 120 is located below the second groove body 121, and the width of the first groove body 120 is greater than the width of the second groove body 121. The sealing ring 13 has a first embedding portion 133 and a second embedding portion 131 respectively embedded and matched with the first groove body 120 and the second groove body 121, and the sealing surface 132 is located at one end of the first embedding portion 133 away from the second embedding portion 131. In this embodiment, the first groove body 120 and the first embedding portion 133 cooperate to play a basic positioning and fixing role for the sealing ring 13, and the second groove body 121 and the second embedding portion 131 cooperate to play a reinforcing role in the connection of the sealing ring 13.

[0100] In order to improve the tightness of the connection of the sealing ring 13 in the embedding groove 12, the embedding groove 12 needs to have a certain depth. Since the embedding groove 12 is provided on the bottle cap 402, the bottle cap 402 needs to have a certain thickness. In order to reduce the manufacturing cost of the bottle cap 402, the thickness of the bottle cap 402 in this embodiment is increased locally, that is, the thickness is increased only at the position corresponding to the embedding groove 12 on the bottle cap 402, and the thickness of the other positions can remain unchanged. Specifically, Fig.17 As shown, in this embodiment, a flange base 15 corresponding to the first groove body 120 is formed on the bottle cap 402 , and a flange top 14 corresponding to the second groove body 121 is formed on the flange base 15 .

[0101] It should be noted that the volume of the flange top 14 is greater than the volume of the second trough body 121. In one embodiment, the shape of the flange top 14 may be similar to the cross-section of the second trough body 121. Figures 16 to 23 As shown, the cross-sectional shape of the flange top 14 and the cross-sectional shape of the second slot body 121 are both rectangular. Fig. 27 and Fig.28 As shown, the cross-sectional shape of the flange top 14 and the cross-sectional shape of the second slot body 121 are both semicircular. Of course, the shape of the flange top 14 may also be different from that of the second slot body 121. In this case, the second slot body 121 may be a polygon (such as Fig. 22 As shown, the shape of the second embedded portion 131 reflects the shape of the second slot body 121), and the flange top 14 can be cylindrical (such as Fig.24 In both embodiments, when the shape of the flange top 14 is similar to the cross section of the second tank body 121, the wall surface of the flange top 14 can be made thinner, which is also conducive to cleaning the flange top 14. When the shape of the flange top 14 is cylindrical and the second tank body is polygonal, the surface of the cylindrical flange top 14 is smoother than that of the polygonal flange top, which is also conducive to cleaning.

[0102] Based on the above embodiment, the second groove body 121 can be an annular groove similar to the first groove body 120. Fig.25 As shown, the sealing ring 13 includes an annular second embedded portion 131 matching the second groove body 121. Fig.26 As shown, the flange top 14 is also an annular raised structure.

[0103] In another embodiment, the second slot body 121 may be a distributed groove (eg Fig. 20 and Fig. 22 As shown, the shape of the second embedded portion 131 reflects the shape of the second groove body 121), that is, the second groove body 121 is set to a plurality of independent grooves, and the corresponding sealing ring 13 includes a second embedded portion 131 (such as Fig. 20 and Fig. 22 As shown), the top of the bottle cap 402 has a distributed flange top 14 (as shown) corresponding to the second groove body 121. Fig.23 and Fig.24 shown).

[0104] When the second groove body 121 is configured as a distributed groove, compared with the annular groove, the material used for the first and second embedded parts matching therewith is reduced, thereby reducing the production cost of the sealing ring 13, and the material used for the bottle cap 402 is also reduced, thereby reducing the production cost of the bottle cap 402. The advantage of using the annular groove is that when installing the sealing ring 13, it is not necessary to accurately align the second embedded part 131 on the sealing ring 13 with the second groove body 121, and the installation process is simpler.

[0105] In one embodiment of the first slot body 120, the cross section of the first slot body 120 may be semicircular or rectangular with rounded corners. When a semicircular shape is adopted, the installation of the first embedded portion 133 is simpler; when a rounded rectangle is adopted, the first embedded portion 133 matched therewith is installed more firmly.

[0106] In one embodiment of the second slot body 121, the cross section of the second slot body 121 may be arc-shaped or polygonal. When the second slot body 121 is arc-shaped, the installation of the second embedded portion 131 is more convenient; when the second slot body 121 is polygonal, under the same equivalent diameter, the second embedded portion 131 and the second slot body 121 are in closer contact.

[0107] In order to facilitate cleaning of the inner side of the bottle cap 402, the structure of the sealing ring 13 is further improved in this embodiment. Fig.17 As shown, in this embodiment, the sealing surface 132 of the sealing ring 13 is inclined with the bottle cap 402, and its upper end is flush with the inner top surface of the bottle cap 402, and the lower end is inclined outward to meet the inner side surface of the bottle cap 402. First, after the upper end of the sealing surface 132 is flush with the inner top surface of the bottle cap 402, the upper end of the sealing surface 132 and the inner top surface of the bottle cap 402 form an obtuse angle and a smooth transition, which is more convenient for cleaning this part and reduces the cleaning dead angle; secondly, after the lower end of the sealing surface 132 is connected with the inner side surface of the bottle cap 402, the lower end of the sealing surface 132 and the inner side surface of the bottle cap 402 also form an obtuse angle and a smooth transition, which is also more convenient for cleaning this part and further reduces the cleaning dead angle.

[0108] In addition, after the sealing surface 132 is an inclined cross-section, its contact area with the bottle mouth of the bottle body 401 is reduced, and the pressure is greater under the same tightening force of the bottle cap 402. Therefore, while ensuring the sealing state formed by the same pressure, the tightening force required for the bottle cap 402 is reduced, which is especially convenient for the elderly to operate.

[0109] Based on the embodiment in which the sealing surface 132 is arranged to be inclined, as Fig.16 and Fig.19 As shown, the cross section of the sealing surface 132 can be a straight line or an arc line. When the cross section of the sealing surface 132 is a straight line, its shape is simple and the mold making is simple. When the cross section of the sealing surface 132 is an arc line, the sealing surface 132 is gradually reduced in the axial direction, making it easier to clean.

[0110] The inclination angle of the sealing surface 132 can be between 30 and 60 degrees, preferably 45 degrees. At this angle, the sealing surface 132 with a straight cross section has a simple structure and is easy to mold, and the sealing surface 132 with an arc cross section gradually transitions to the side of the bottle cap 402, making it easier to clean during maintenance.

[0111] On the one hand, the present application achieves the purpose of embedding and fixing the sealing ring 13 in the embedding groove 12, so that the sealing ring 13 will not fall off after the bottle cap 402 is disassembled, thereby achieving the technical effect of facilitating the installation of the bottle cap 402; on the other hand, it achieves the purpose of enabling the inclined sealing surface 132 on the sealing ring 13 to be in line contact with the opening edge of the bottle body 401, which reduces the contact area and increases the contact pressure compared to surface contact, so that under the sealing condition formed by the same pressure, the required force is reduced, which is convenient for the elderly to install and use; on the other hand, after the upper end of the sealing surface 132 is flush with the inner top surface of the bottle cap 402 and the lower end of the sealing surface 132 is close to the inner side surface of the bottle cap 402, there is no dead corner between the sealing ring 13 and the bottle cap 402 that is difficult to clean and hides dirt, so even the elderly can easily complete the cleaning work when maintaining the buffer bottle 4.

[0112] The sealing ring 13 may be made of silicone, and its hardness ranges from 40 to 60 degrees, preferably 50 degrees.

[0113] According to another aspect of the present application, a transdermal drug delivery therapeutic apparatus is provided, comprising the above-mentioned vacuum system.

[0114] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Within the spirit and principle of the present application, any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present application.

Claims

1. A vacuum system, characterized in that: include: Steaming plate, buffer bottle and vacuum pump; among which, The steaming plate comprises a central cavity and an annular cavity which are isolated from each other, the annular cavity is opened on the outside of the central cavity around the circumference of the central cavity, the annular cavity is configured to be adsorbed and fixed on the medication site under the action of negative pressure, the buffer bottle has a closed buffer cavity, and the buffer bottle is provided with an air inlet pipe and an air outlet pipe which are connected with the buffer cavity; The air inlet pipe is connected to the air outlet of the annular cavity through a first ventilation pipeline, and the air outlet pipe is connected to the air inlet of the vacuum pump through a second ventilation pipeline. Under the negative pressure of the vacuum pump, the gas-liquid mixture in the steaming plate flows through the first ventilation pipeline into the buffer cavity for gas-liquid separation, and the separated gas enters the vacuum pump through the second ventilation pipeline and is discharged.

2. The vacuum system according to claim 1, characterized in that It also includes a one-way valve, and the second ventilation pipeline includes a ventilation front section and a ventilation tail section, the two ends of the ventilation front section are respectively connected to the outlet pipe and the air inlet of the one-way valve, and the two ends of the ventilation tail section are respectively connected to the outlet of the one-way valve and the air inlet of the vacuum pump.

3. The vacuum system according to claim 1 or 2, characterized in that: The buffer bottle comprises a bottle body and a bottle cap, wherein the bottle cap is detachably fixed to the bottle body, a sealing structure is arranged at the connection between the bottle cap and the bottle body, and the air inlet pipe and the air outlet pipe are both arranged on the bottle cap.

4. The vacuum system according to claim 3, characterized in that A partition is provided in the buffer bottle, the upper end of the partition is fixedly connected to the inner side of the bottle cap, and the lower end of the partition is provided with a first gas passage; The partition divides the buffer cavity into a first cavity and a second cavity in the radial direction, and the first cavity and the second cavity are connected through the first gas passage; The air inlet pipe corresponds to the first cavity, and the air outlet pipe corresponds to the second cavity.

5. The vacuum system according to claim 3, characterized in that The air inlet pipe comprises an outer pipe section and an inner pipe section which are connected, wherein the outer pipe section is located on the outer side of the bottle cap, the inner pipe section is located on the inner side of the bottle cap and extends toward the bottom of the bottle body, and a second air passage which is connected to the buffer cavity is provided at the lower end of the inner pipe section; The height of the lower end of the air outlet pipe is higher than the height of the lower end of the inner pipe section.

6. The vacuum system according to claim 5, characterized in that The lower end of the inner tube section is provided with a communicating expansion tube, the inner diameter of the expansion tube is larger than the inner diameter of the inner tube section, and the second air passage is located at the lower end of the expansion tube.

7. The vacuum system according to claim 6, characterized in that The expansion tube is configured to be cylindrical or conical. When the expansion tube is configured to be conical, the cross-sectional area of ​​the expansion tube gradually increases from top to bottom.

8. The vacuum system according to claim 5, characterized in that A shield is provided at the lower end of the inner tube section, and the shield has a shielding portion extending toward the inner side wall of the bottle body. The buffer cavity is axially divided into a third cavity and a fourth cavity by the shield. The third cavity and the fourth cavity are connected through a third air passage, and the air outlet pipe corresponds to the third cavity.

9. The vacuum system according to claim 8, characterized in that A third air passage communicating with the third cavity and the fourth cavity is provided between the edge of the shielding portion and the inner wall of the bottle body.

10. The vacuum system according to claim 8, characterized in that The edge of the shielding portion abuts against the inner wall of the bottle body, and a plurality of vent holes are formed on the shielding portion to form a third air passage connecting the third cavity and the fourth cavity.

11. The vacuum system according to claim 10, characterized in that The vent hole is a groove formed on the peripheral edge of the shielding portion, and / or the vent hole is a straight hole formed on the shielding portion.

12. The vacuum system according to claim 8, characterized in that The shielding portion is provided with a vent cylinder, which serves as a third air passage connecting the third cavity and the fourth cavity. The lower end of the vent cylinder extends out of the lower end surface of the shielding portion, and the position of the vent cylinder corresponds to the position of the outlet pipe.

13. The vacuum system according to any one of claims 8 to 12, characterized in that The shielding portion is configured as a flat structure extending in the radial direction or the shielding portion is a conical structure. When the shielding portion is a conical structure, the cross-sectional area of ​​the shielding portion gradually increases from top to bottom.

14. A transdermal drug delivery therapeutic device, characterized in that: Comprising a vacuum system as claimed in any one of claims 1 to 13.

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