A sterilization cabinet for syringes and a method for manufacturing syringes.

Abstract

This application relates to a sterilization cabinet for syringes and a method for manufacturing syringes. The cabinet includes an outer cabinet and an inner cabinet located inside the outer cabinet. A door is fitted onto one side of the outer cabinet. Multiple support frames are spaced apart on one side of the inner cabinet from the side closest to the door to the other side. The support frames are fixedly fitted onto the inner cabinet, and their peripheries are fixedly connected to the inner wall of the outer cabinet. A strip is fixedly installed between the inner wall of the outer cabinet (away from the door) and the outer wall of the inner cabinet (away from the door). An ethylene oxide tank, a heating mechanism, a vacuum mechanism, and a humidification mechanism are disposed outside the outer cabinet. A feed pipe is connected to the ethylene oxide tank, and a first valve is installed on the feed pipe. The end of the feed pipe away from the ethylene oxide tank passes through the outer cabinet and connects to the interior of the inner cabinet. This application provides convenient heating of the interior of the inner cabinet.

Description

Technical Field

[0001] This application relates to the field of syringes, and more particularly to a sterilizer for syringes and a method for manufacturing syringes. Background Technology

[0002] A syringe is a common disposable medical device. A typical syringe includes an outer tube, a plunger, a needle, and a piston. The piston is fixedly mounted at one end of the plunger. The needle is mounted at one end of the outer tube, and the plunger, with the piston attached, is inserted into the outer tube from the end furthest from the needle.

[0003] The syringe is assembled after the outer tube, core, needle, and plunger are manufactured separately. Each assembled syringe is then individually bagged. Multiple bagged syringes are placed in a box, and then multiple boxes containing syringes are placed inside a crate. The crates of syringes are then placed in a sterilizer for sterilization.

[0004] Syringes are typically sterilized using an ethylene oxide sterilizer. This sterilizer includes an ethylene oxide tank, a humidification mechanism, a vacuum mechanism, a heating mechanism, an inner cabinet, and an outer cabinet. The inner cabinet is installed inside the outer cabinet. A space exists between the outer wall of the inner cabinet and the inner wall of the outer cabinet. The heating mechanism supplies steam between these two spaces to heat the sterilizer. The vacuum mechanism creates a vacuum inside the cabinet. The humidification mechanism adjusts the humidity inside the inner cabinet, and the ethylene oxide tank delivers ethylene oxide into the inner cabinet for sterilization.

[0005] Regarding the aforementioned technologies, a vacuum mechanism evacuates the interior of the inner cabinet, thereby reducing the internal air pressure. To reduce the risk of damage to the inner cabinet due to atmospheric pressure during vacuuming, the wall thickness of the inner cabinet is typically increased. However, increasing the wall thickness can affect the heating of the interior by water vapor. Summary of the Invention

[0006] To facilitate heating of the interior of the cabinet, this application provides a sterilization cabinet for syringes and a method for manufacturing syringes.

[0007] This application provides a sterilization cabinet for syringes and a method for manufacturing syringes, which adopts the following technical solution:

[0008] A sterilizing cabinet for syringes includes an outer cabinet and an inner cabinet located inside the outer cabinet. A door is fitted onto one side of the outer cabinet. Multiple support frames are spaced apart on one side of the inner cabinet from the side closest to the door to the other side. These support frames are fixedly fitted onto the inner cabinet, and their peripheries are fixedly connected to the inner wall of the outer cabinet. A strip is fixedly installed between the inner wall of the outer cabinet (away from the door) and the outer wall of the inner cabinet (away from the door). An ethylene oxide tank, a heating mechanism, a vacuum mechanism, and a humidification mechanism are disposed outside the outer cabinet. The heating mechanism is used to inject water vapor between the outer and inner walls of the inner cabinet to heat it. The vacuum mechanism is used to extract gas from the interior of the inner cabinet or allow air to enter. The humidification mechanism is used to humidify the interior of the inner cabinet. The ethylene oxide tank is connected to a feeding pipe equipped with a first valve. The end of the feeding pipe away from the ethylene oxide tank penetrates the outer cabinet and connects to the interior of the inner cabinet.

[0009] By adopting the above technical solution, after the vacuum mechanism is activated to evacuate the interior of the inner cabinet, the support frame and strips support the inner cabinet, thereby reducing the possibility of damage to the inner cabinet due to atmospheric compression during vacuuming, and thus helping to reduce the wall thickness of the inner cabinet. Subsequently, when the heating mechanism introduces steam into the space between the inner and outer cabinets for heating, the smaller wall thickness of the inner cabinet facilitates heating of its interior.

[0010] Optionally, the outer cabinet, inner cabinet, and two adjacent support frames form a first heating cavity. Multiple strips are provided, spaced apart along the height direction. One end of each strip is staggered from bottom to top and fixedly connected to an inner sidewall of the outer cabinet. The inner cabinet, outer cabinet, and each strip form a second heating cavity. A first air inlet and a first air outlet communicating with the first heating cavity are provided on one side of the outer cabinet. A second air inlet and a second air outlet communicating with the second heating cavity are also provided on one side of the outer cabinet. The first air inlet, first air outlet, second air inlet, and second air outlet are used to supply steam to the heating mechanism to heat the inner cabinet. A baffle plate is fixedly installed inside the first heating cavity, located between the first air outlet and the first air inlet. The first air outlet is positioned lower than the first air inlet.

[0011] By adopting the above technical solution, the heating mechanism introduces water vapor into the first heating chamber through the first air inlet. The water vapor is blocked by a baffle plate, causing it to flow along the first heating chamber and then exit through the first air outlet below the baffle plate, thereby accelerating the flow rate of the water vapor within the first heating chamber. This increased flow rate reduces the air pressure outside the inner cabinet. The reduced air pressure outside the inner cabinet facilitates a reduction in the wall thickness of the inner cabinet, thus facilitating heating of its interior. The heating mechanism also introduces water vapor into the second heating chamber through the second air inlet. The water vapor is blocked by a strip plate, causing it to flow from one end of the second heating chamber to the other and then exit through the second air outlet, further accelerating the flow rate within the second heating chamber. This increased flow rate also reduces the air pressure outside the inner cabinet. This reduced air pressure outside the inner cabinet facilitates a reduction in the wall thickness of the inner cabinet, thus facilitating heating of its interior.

[0012] Optionally, the heating mechanism includes a steam generator, a vacuum pump, a first insulation pipe, a second insulation pipe, and a third insulation pipe. The first insulation pipe is fixedly installed at the feed end of the steam generator and the outlet end of the vacuum pump. The outlet end of the steam generator is fixedly connected to one end of the second insulation pipe. The end of the second insulation pipe away from the steam generator is closed. The pipe body of the second insulation pipe away from the steam generator is connected to a second air inlet and each of the first air inlets. The air inlet end of the vacuum pump is connected to one end of the third insulation pipe. The pipe body of the third insulation pipe is connected to a second air outlet and each of the first air outlets. The end of the third insulation pipe away from the vacuum pump is closed.

[0013] By adopting the above technical solution, the steam generator produces water vapor which is then sent into the first and second heating chambers through the second insulation pipe. A vacuum pump is then activated to extract the water vapor from the first and second heating chambers, thereby increasing the water vapor flow rate within them. This increased water vapor flow rate reduces the external air pressure of the inner cabinet. This reduced external air pressure allows for a reduction in the inner cabinet's wall thickness, facilitating efficient heating of the interior by the water vapor. The water vapor extracted by the vacuum pump is then returned to the steam generator through the first insulation pipe.

[0014] Optionally, a three-way reversing valve is installed between the discharge end of the steam generator and the second insulation pipe. The three-way reversing valve is connected to a first air inlet pipe. A heating box is fixedly installed at the end of the first air inlet pipe away from the three-way reversing valve. An electric heating grid is fixedly installed inside the heating box. A second air inlet pipe is fixedly installed on the side of the heating box away from the first air inlet pipe. The electric heating grid is located between the first air inlet pipe and the second air inlet pipe. The three-way reversing valve is used to control the connection between the second insulation pipe and the steam generator, or between the second insulation pipe and the first air inlet pipe.

[0015] By employing the above technical solution, when the temperature inside the inner cabinet reaches the sterilization temperature of a syringe under ethylene oxide, the three-way reversing valve is activated to disconnect the second insulation pipe from the steam generator, allowing the second insulation pipe to connect to the first air inlet pipe. Air enters the heating chamber through the second air inlet pipe, and after being heated by the heating mesh, it is sent into the first and second heating chambers. This heated air heats the inner cabinet, thereby facilitating an increase in the airflow velocity inside the inner cabinet. Simultaneously, it helps to evaporate and discharge any water inside the first and second heating chambers.

[0016] Optionally, the bottom side of the outer cabinet is provided with a plurality of drain holes for communicating with the first heating chamber and the second heating chamber. The outer cabinet is provided with a drain pipe and a filter. The body of the drain pipe is connected to each of the drain holes. One end of the drain pipe is closed and the other end of the drain pipe is connected to the water inlet of the filter. A recycling box is installed at the water outlet of the filter.

[0017] By adopting the above technical solution, water vapor liquefies inside the first and second heating chambers, accumulates, and flows to the drain hole. Water flows from the drain hole into the drain pipe and then into the filter. After passing through the filter, the water is discharged into the recycling tank for recycling, thus facilitating the recovery of water generated after water vapor liquefaction.

[0018] Optionally, a float is provided above the baffle plate, and a counterweight rod is fixedly installed on the side of the float plate near the baffle plate. The baffle plate has a through hole for the counterweight rod to pass through. The diameter of the counterweight rod is smaller than the diameter of the through hole. A limit rod is fixedly installed on the end of the counterweight rod away from the float, and the limit rod is used to prevent the counterweight rod from being pulled out of the through hole.

[0019] By adopting the above technical solution, water vapor liquefies and accumulates above the baffle plate. Then, the float rises, allowing water to drain from the through-hole to the inner bottom wall of the outer cabinet, thus facilitating the discharge of water above the baffle plate. After the water drains from the baffle plate, the counterweight rod causes the float to fall, causing it to re-block the through-hole, thereby reducing the occurrence of water vapor draining into the area below the baffle plate through the through-hole.

[0020] Optionally, the vacuum mechanism includes a vacuum pump, an extraction pipe, a third inlet pipe, and a second valve. One end of the extraction pipe is connected to the inlet of the vacuum pump. One end of the third inlet pipe and the other end of the extraction pipe pass through the outer cabinet and connect to the inside of the inner cabinet. The second valve is fixedly installed on the third inlet pipe.

[0021] By adopting the above technical solution, when it is necessary to evacuate the inner cabinet, the vacuum pump is started, and the vacuum pump extracts the air from inside the inner cabinet through the extraction pipe. When it is necessary to introduce air into the inner cabinet, the second valve is opened, and then the air enters the inner cabinet through the third inlet pipe, thus facilitating the alternating evacuation and air introduction of the inner cabinet.

[0022] Optionally, the humidification mechanism includes a humidifier and a humidification pipe, one end of which is connected to the discharge end of the humidifier, and the other end of which passes through the outer cabinet and connects to the interior of the inner cabinet.

[0023] By adopting the above technical solution, the humidifier is started, and the humidifier humidifies the inside of the cabinet through the humidification pipe, thereby making it easy to adjust the humidity inside the cabinet.

[0024] A method for manufacturing a syringe includes the following steps: fabricating an outer tube, a core rod, an injection needle, and a piston, and printing graduations on the outer tube; assembling the outer tube, core rod, injection needle, and piston into a syringe; packaging each syringe in an ethylene oxide-permeable bag; packaging multiple syringes in an ethylene oxide-permeable box; packaging multiple boxes of syringes in an ethylene oxide-permeable carton; sterilizing the boxed syringes in a sterilization cabinet; sterilizing the sterilized syringes in a desorption chamber; and storing the desorbed syringes in a warehouse.

[0025] By employing the above technical solution, ethylene oxide directly sterilizes the outer packaging of the syringe. After the syringe is removed from the sterilization cabinet, the outer packaging protects the syringe, thereby reducing the possibility of recontamination.

[0026] Optionally, sterilizing the boxed syringes in a sterilization cabinet includes the following steps: placing the boxed syringes into the inner cabinet and closing the cabinet door; activating the vacuum mechanism to evacuate the inside of the inner cabinet, activating the heating mechanism to heat the inner cabinet, and activating the humidification mechanism to adjust the humidity inside the inner cabinet; opening the first valve to allow the ethylene oxide tank to introduce ethylene oxide into the inner cabinet for sterilization; after sterilization, alternately driving the vacuum mechanism to extract the ethylene oxide from the inner cabinet and allowing air to enter the inner cabinet; after extracting the ethylene oxide, placing the sterilized syringes into the analysis chamber for analysis.

[0027] By adopting the above technical solution, after the syringe is sterilized, the vacuum mechanism repeatedly evacuates and introduces air into the interior of the inner cabinet, which helps to reduce the amount of ethylene oxide adhering to the injection molds in the box.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The support frame and strips are connected between the outer wall of the inner cabinet and the inner wall of the outer cabinet, thereby reducing the possibility of damage to the inner cabinet due to atmospheric pressure during vacuuming. This also helps to reduce the wall thickness of the inner cabinet. When the heating mechanism introduces water vapor into the space between the inner and outer cabinets for heating, the wall thickness of the inner cabinet is small, which facilitates heating the interior of the inner cabinet.

[0030] 2. The vacuum pump increases the flow rate of water vapor and air inside the first and second heating chambers, thereby reducing the atmospheric pressure on the outer wall of the inner cabinet after vacuuming, which in turn facilitates the reduction of the inner cabinet wall thickness.

[0031] 3. When water vapor liquefies into water and accumulates above the baffle, the float moves the counterweight upward, causing the water to flow from the through hole to the inner bottom wall of the outer cabinet. Then the water is discharged from the drain hole, thus facilitating the drainage of water above the baffle. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0033] Figure 2 This is a first-view structural schematic diagram of the inner and outer cabinets in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the inner cabinet, support frame, and strip structure according to an embodiment of this application;

[0035] Figure 4 This is a second-view structural schematic diagram of the inner and outer cabinets in an embodiment of this application;

[0036] Figure 5 yes Figure 4 Sectional view at AA;

[0037] Figure 6 yes Figure 4 Sectional view at BB;

[0038] Figure 7 yes Figure 5 Enlarged view at point A;

[0039] Figure 8 This is a schematic diagram of the heating mechanism according to an embodiment of this application;

[0040] Figure 9 This is a schematic diagram of the heating box according to an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Outer cabinet; 2. Inner cabinet; 3. Cabinet door; 4. Vacuum mechanism; 41. Vacuum pump; 42. Evacuation pipe; 43. Third air inlet pipe; 44. Second valve; 5. Support frame; 6. Strip plate; 7. First heating chamber; 8. Second heating chamber; 9. First air inlet; 10. Second air inlet; 11. First air outlet; 12. Second air outlet; 13. Baffle plate; 14. Heating mechanism; 141. Steam generator; 142. Evacuation pump; 143. First insulation pipe; 14 4. Second insulation pipe; 145. Third insulation pipe; 15. Three-way reversing valve; 16. First air inlet pipe; 17. Second air inlet pipe; 18. Heating box; 19. Electric heating grid; 20. Drain hole; 21. Through hole; 22. Counterweight rod; 23. Limiting rod; 24. Float; 25. Drain pipe; 26. Filter; 27. Humidification mechanism; 271. Humidifier; 272. Humidification pipe; 28. Ethylene oxide tank; 29. ​​Feeding pipe; 30. First valve; 31. Recovery box; 32. Third valve. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0043] This application discloses a sterilization cabinet for syringes and a method for manufacturing syringes.

[0044] Reference Figure 1 A sterilization cabinet for syringes includes an outer cabinet 1 and an inner cabinet 2 located inside the outer cabinet 1. A cabinet door 3 is provided on one side of the outer cabinet 1. The cabinet door 3 is opened, boxes of syringes are placed inside the inner cabinet 2, and then the cabinet door 3 is closed.

[0045] Reference Figure 1 The outer cabinet 1 is equipped with a vacuum mechanism 4, which includes a vacuum pump 41, an extraction pipe 42, a third inlet pipe 43, and a second valve 44. The vacuum pump 41 is located outside the outer cabinet 1, and its inlet end is fixedly connected to one end of the extraction pipe 42. The other end of the extraction pipe 42 passes through the outer cabinet 1 and connects to the inner cabinet 2. When the vacuum pump 41 is started, it creates a vacuum inside the inner cabinet 2 through the extraction pipe 42.

[0046] One end of the third air inlet pipe 43 passes through the outer cabinet 1 and connects to the inner cabinet 2. The second valve 44 is fixedly installed on the third air inlet pipe 43. After the syringes in the box are sterilized, the vacuum pump 41 is started to extract the air from inside the inner cabinet 2, and then the vacuum pump 41 is turned off. Then the second valve 44 is opened, and air enters the inner cabinet 2 from the third air inlet pipe 43. By repeatedly and alternately extracting and introducing air into the inner cabinet 2, the amount of ethylene oxide adhering to the syringes in the box is reduced.

[0047] Reference Figure 2 , Figure 3 Multiple support frames 5 are spaced apart on one side of the inner cabinet 2 closest to the cabinet door 3 and fixedly fitted onto the inner cabinet 2. The periphery of the support frames 5 is fixedly connected to the inner wall of the outer cabinet 1. A strip 6 is fixedly installed between the inner wall of the outer cabinet 1 on the side away from the cabinet door 3 and the outer wall of the inner cabinet 2 on the side away from the cabinet door 3.

[0048] The strip 6 and support frame 5 connect the inner cabinet 2 to the outer wall and the inner wall of the outer cabinet 1, thereby improving the compressive strength of the inner cabinet 2 and reducing the possibility of damage to the inner cabinet 2 due to atmospheric pressure after the vacuum mechanism 4 evacuates the interior of the inner cabinet 2. To resist atmospheric pressure after vacuuming, the inner cabinet 2 needs increased thickness; however, the strip 6 and support frame 5 increase the compressive strength of the inner cabinet 2, thus facilitating a reduction in the wall thickness of the inner cabinet 2.

[0049] Reference Figure 3 , Figure 4 , Figure 5 The outer cabinet 1, the inner cabinet 2, and two adjacent support frames 5 enclose the first heating cavity 7. There are multiple strips 6, which are spaced apart along the height direction.

[0050] Reference Figure 3 , Figure 6 One end of multiple strips 6 is fixedly connected to an inner side wall of the outer cabinet 1 from bottom to top, and the inner cabinet 2, the outer cabinet 1 and each strip 6 form a second heating cavity 8.

[0051] Reference Figure 4 , Figure 7 The outer cabinet 1 has multiple first air inlets 9 and first air outlets 11 on one side, the number of which is equal to the number of first heating chambers 7. Each first air inlet 9 and first air outlet 11 is connected to a first heating chamber 7. The position of the first air outlet 11 is lower than that of the first air inlet 9. A baffle plate 13 is fixedly installed inside the first heating chamber 7, and the baffle plate 13 is located between the positions of the first air outlet 11 and the first air inlet 9.

[0052] Water vapor is introduced into the first heating chamber 7 through the first air inlet 9. After being blocked by the baffle plate 13, the water vapor flows along the internal space of the first heating chamber 7 and moves below the baffle plate 13. Then, the water vapor is discharged from the first air outlet 11. By blocking the water vapor through the baffle plate 13, the flow rate of the water vapor inside the first heating chamber 7 is accelerated, thereby reducing the pressure inside the first heating chamber 7. By reducing the pressure inside the first heating chamber 7, it is easier to reduce the wall thickness of the inner cabinet 2, which can resist atmospheric compression. The reduced wall thickness of the inner cabinet 2 facilitates the heating of the interior of the inner cabinet 2 by the water vapor.

[0053] Reference Figure 4 , Figure 6 The outer cabinet 1 has a second air inlet 10 and a second air outlet 12 on one side. The second air inlet 10 is connected to the upper end of the second heating chamber 8, and the second air outlet 12 is connected to the lower end of the second heating chamber 8.

[0054] Water vapor is introduced into the second heating chamber 8 through the second air inlet 10. Guided by the inner wall of the second heating chamber 8, the water vapor flows from one end to the other, thus accelerating its flow rate and reducing the pressure inside the chamber. This reduced pressure allows for a reduction in the wall thickness of the inner cabinet 2, enabling it to withstand atmospheric pressure. The reduced wall thickness facilitates heating of the interior by the water vapor. The water vapor inside the second heating chamber 8 is then discharged through the second air outlet 12.

[0055] Reference Figure 1 , Figure 4 , Figure 8 The outer cabinet 1 is equipped with a heating mechanism 14, which includes a steam generator 141, a vacuum pump 142, a first insulation pipe 143, a second insulation pipe 144, and a third insulation pipe 145. Both the steam generator 141 and the vacuum pump 142 are located outside the outer cabinet 1. The steam generator 141 is equipped with a three-way reversing valve 15. The first end of the three-way reversing valve 15 is connected to the discharge end of the steam generator 141, and the second end of the three-way reversing valve 15 is fixedly connected to one end of the second insulation pipe 144. The body of the second insulation pipe 144 is connected to the second air inlet 10 and each of the first air inlets 9, and the end of the second insulation pipe 144 away from the steam generator 141 is closed.

[0056] Water is added to the steam generator 141, which heats the water to generate steam. The steam then enters the second insulation pipe 144 from the outlet of the steam generator 141. The second insulation pipe 144 sends the steam from the first air inlet 9 into the first heating chamber 7 and from the second air inlet 10 into the second heating chamber 8, thus facilitating the delivery of steam to the first heating chamber 7 and the second heating chamber 8 to heat the inner cabinet 2.

[0057] Reference Figure 4 , Figure 8The air inlet of the vacuum pump 142 is connected to one end of the third insulation pipe 145. The body of the third insulation pipe 145 is connected to the second air outlet 12 and each of the first air outlets 11. The end of the third insulation pipe 145 away from the vacuum pump 142 is closed. After the water vapor enters the first heating chamber 7 and the second heating chamber 8, the vacuum pump 142 is started. The vacuum pump 142 accelerates the flow rate of water vapor inside the first heating chamber 7 and the second heating chamber 8, thereby reducing the air pressure outside the inner cabinet 2. By reducing the air pressure outside the inner cabinet 2, it is easier to reduce the wall thickness of the inner cabinet 2. The reduced wall thickness of the inner cabinet 2 facilitates the heating of the interior of the inner cabinet 2 by water vapor. The increased flow rate of water vapor inside the first heating chamber 7 and the second heating chamber 8 also improves the uniformity of heating the inner cabinet 2 by water vapor.

[0058] Reference Figure 8 The first insulation pipe 143 is fixedly installed at the feed end of the steam generator 141 and the outlet end of the vacuum pump 142. The vacuum pump 142 draws water vapor from the first heating chamber 7 and the second heating chamber 8 and sends it into the first insulation pipe 143. Then, the water vapor is sent from the first insulation pipe 143 into the steam generator 141, which facilitates the recovery of water vapor.

[0059] Reference Figure 8 , Figure 9 A first air intake pipe 16 is connected to the third end of a three-way reversing valve 15. A heating box 18 is fixedly installed at the end of the first air intake pipe 16 away from the three-way reversing valve 15. An electric heating grid 19 is fixedly installed inside the heating box 18, and a second air intake pipe 17 is fixedly installed on the side of the heating box 18 away from the first air intake pipe 16. The electric heating grid 19 is located between the first air intake pipe 16 and the second air intake pipe 17.

[0060] After the steam raises the temperature inside the inner cabinet 2 to a level suitable for sterilizing the molded syringes with ethylene oxide, the steam generator 141 is turned off, the electric heating grid 19 is activated, and then the second insulation pipe 144 is connected to the first air inlet pipe 16 via the three-way reversing valve 15. Air is drawn into the heating chamber 18 through the second air inlet pipe 17 by the suction pump 142. After being heated by the heating grid, the air enters the first air inlet pipe 16. The first air inlet pipe 16 delivers the hot air into the second insulation pipe 144, and then into the first heating chamber 7 and the second heating chamber 8. The inner cabinet 2 is kept warm by heating with hot air. Simultaneously, the hot air helps to accelerate the evaporation of water inside the first heating chamber 7 and the second heating chamber 8, thereby reducing the possibility of water corrosion damage to the inner walls of the first heating chamber 7 and the second heating chamber 8.

[0061] After the temperature of the inner cabinet 2 decreases, the steam generator 141 is restarted, then the electric heating network 19 is turned off, and then the second heat preservation pipe 144 is connected to the steam generator 141 through the three-way reversing valve 15, so as to facilitate the continued introduction of water vapor into the first heating chamber 7 and the second heating chamber 8 for heating.

[0062] Reference Figure 2 The outer cabinet 1 has multiple drainage holes 20 on its bottom side, with one drainage hole 20 corresponding to each of the first heating chambers 7 and the second heating chamber 8. After water vapor liquefies inside the first heating chamber 7 and the second heating chamber 8, the water accumulates on the inner bottom wall of the outer cabinet 1. The water is then discharged from the drainage holes 20.

[0063] Reference Figure 7 The baffle plate 13 has a through hole 21 and is equipped with a counterweight rod 22, a limiting rod 23, and a float 24. The counterweight rod 22 passes through the through hole 21, the float 24 is located above the baffle plate 13, and the limiting rod 23 is located below the baffle plate 13. The float 24 is fixedly connected to one end of the counterweight rod 22, and the body of the limiting rod 23 is fixedly connected to the other end of the counterweight rod 22.

[0064] After the water vapor liquefies, some of it accumulates above the baffle plate 13. Then, the float 24 rises, allowing water to flow from the through-hole 21 to the inner bottom wall of the outer cabinet 1, thus facilitating the drainage of water from the baffle plate 13. When the float 24 is floating, water covers the through-hole 21, reducing the amount of water vapor passing through it. When the float 24 is against the top surface of the baffle plate 13, it blocks the through-hole 21, further reducing the amount of water vapor passing through it.

[0065] Reference Figure 1 , Figure 2 The outer cabinet 1 is equipped with a drain pipe 25 and a filter 26. The body of the drain pipe 25 is connected to each drain hole 20. One end of the drain pipe 25 is closed, and the other end of the drain pipe 25 is connected to the water inlet of the filter 26. A recycling box 31 is installed at the water outlet of the filter 26.

[0066] Filter 26 draws water from the inner bottom wall of the outer cabinet 1. The water then enters filter 26 through drain pipe 25, is filtered, and flows to recycling tank 31, facilitating water recycling. Drain pipe 25 is equipped with a third valve 32. Opening and closing drain pipe 25 via the third valve 32 reduces the possibility of water vapor entering recycling tank 31 from the first heating chamber 7 and the second heating chamber 8.

[0067] Reference Figure 1The outer cabinet 1 is equipped with a humidification mechanism 27, which includes a humidifier 271 and a humidification pipe 272. The humidifier 271 is located outside the outer cabinet 1. One end of the humidification pipe 272 is connected to the discharge end of the humidifier 271, and the other end of the humidification pipe 272 passes through the outer cabinet 1 and connects to the interior of the inner cabinet 2. The humidifier delivers water vapor into the interior of the inner cabinet 2 through the humidification pipe 272, thereby facilitating the adjustment of the humidity inside the inner cabinet 2.

[0068] Reference Figure 1 An ethylene oxide tank 28 is installed on the outside of the outer cabinet 1, and a feed pipe 29 is connected to the ethylene oxide tank 28. A first valve 30 is installed on the feed pipe 29, and the end of the feed pipe 29 away from the ethylene oxide tank 28 passes through the outer cabinet 1 and connects to the inside of the inner cabinet 2. When the valve is opened, ethylene oxide enters the inner cabinet 2 through the feed pipe 29. The ethylene oxide is used to sterilize the boxes of syringes.

[0069] A method for producing syringes, using the sterilizer of this embodiment, includes the following steps:

[0070] S1. Make the outer tube, core rod, injection needle and piston, and print the scale on the outer tube.

[0071] S2. Assemble the outer tube, core rod, injection needle, and piston into a syringe.

[0072] S3. Pack each syringe in an ethylene oxide-permeable packaging bag.

[0073] S4. Pack multiple syringes in a box that can be permeated by ethylene oxide.

[0074] S5. Use ethylene oxide-permeable boxes to package multiple syringes.

[0075] S6. Place the boxed syringes into a sterilizer for sterilization, including the following steps:

[0076] S601. Place the boxed syringes into the inner cabinet 2 and close the cabinet door 3.

[0077] S602, activate vacuum mechanism 4 to evacuate the interior of inner cabinet 2, activate heating mechanism 14 to heat inner cabinet 2, and activate humidification mechanism 27 to adjust the humidity inside inner cabinet 2.

[0078] Vacuum mechanism 4 extracts air from inner cabinet 2, thereby reducing the impact of internal air on the sterilization effect of ethylene oxide and also enhancing the diffusion effect of ethylene oxide. Heating mechanism 14 introduces water vapor into the first heating chamber 7 and the second heating chamber 8 to heat the interior of inner cabinet 2. After the temperature inside inner cabinet 2 reaches a suitable temperature for ethylene oxide sterilization, heating continues, facilitating the increase of the internal temperature of the boxed syringes. Then, a three-way reversing valve 15 connects the second insulation pipe 144 to the first air inlet pipe 16, allowing hot air to enter the first heating chamber 7 and the second heating chamber 8 for insulation. Humidification mechanism 27 adjusts the humidity inside inner cabinet 2.

[0079] S603. Open the first valve 30 to allow ethylene oxide tank 28 to introduce ethylene oxide into the inner cabinet 2 for sterilization.

[0080] S604. After sterilization, the vacuum mechanism 4 is driven alternately to extract the ethylene oxide inside the inner cabinet 2 and allow air to enter the inner cabinet 2.

[0081] After sterilization, the vacuum mechanism 4 is activated to evacuate the inner cabinet 2, and then air is sent into the inner cabinet 2 through the vacuum mechanism 4. This process is repeated to reduce the residual ethylene oxide on the surface of the syringes in the box.

[0082] S7. Place the sterilized syringe into the analysis chamber for analysis.

[0083] S8. Save the analyzed syringes into the database.

[0084] The implementation principle of the sterilization cabinet for syringes and the manufacturing method of syringes in this application is as follows: A support frame 5 and support strips are connected between the outer wall of the inner cabinet 2 and the inner wall of the outer cabinet 1, thereby reducing the likelihood of damage to the inner cabinet 2 due to atmospheric pressure after vacuuming. The increased pressure resistance of the inner cabinet 2 facilitates a reduction in its thickness, thus allowing for easier heating of the interior of the inner cabinet 2 by steam.

[0085] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sterilizer for syringes, characterized in that: The system includes an outer cabinet (1) and an inner cabinet (2) located inside the outer cabinet (1). A cabinet door (3) is provided on one side of the outer cabinet (1). Multiple support frames (5) are provided at intervals from one side of the inner cabinet (2) to the other side near the cabinet door (3). The support frames (5) are fixedly fitted onto the inner cabinet (2). The periphery of the support frames (5) is fixedly connected to the inner wall of the outer cabinet (1). A strip plate (6) is fixedly installed between the inner wall of the outer cabinet (1) away from the cabinet door (3) and the outer wall of the inner cabinet (2) away from the cabinet door (3). An ethylene oxide tank (28) and a heating mechanism (14) are provided on the outside of the outer cabinet (1). The inner cabinet (2) is equipped with a vacuum mechanism (4) and a humidification mechanism (27). The heating mechanism (14) is used to send water vapor between the outer wall of the inner cabinet (2) and the inner wall of the outer cabinet (1) to heat the inner cabinet (2). The vacuum mechanism (4) is used to extract the gas inside the inner cabinet (2) or allow air to enter the inner cabinet (2). The humidification mechanism (27) is used to humidify the inside of the inner cabinet (2). The ethylene oxide tank (28) is connected to a feeding pipe (29). The feeding pipe (29) is equipped with a first valve (30). The end of the feeding pipe (29) away from the ethylene oxide tank (28) passes through the outer cabinet (1) and connects to the inside of the inner cabinet (2). The outer cabinet (1), inner cabinet (2), and two adjacent support frames (5) form a first heating cavity (7). Multiple strips (6) are provided, spaced apart along the height direction. One end of each strip (6) is staggered from bottom to top and fixedly connected to one inner wall of the outer cabinet (1). The inner cabinet (2), outer cabinet (1), and each strip (6) form a second heating cavity (8). A first air inlet (9) and a first air outlet (11) communicating with the first heating cavity (7) are provided on one side of the outer cabinet (1). A second air inlet (10) and a second air outlet (12) communicating with the second heating chamber (8) are provided on the side. The first air inlet (9), the first air outlet (11), the second air inlet (10) and the second air outlet (12) are used to supply water steam into the inner cabinet (2) by the heating mechanism (14). A baffle plate (13) is fixedly installed inside the first heating chamber (7). The baffle plate (13) is located between the first air outlet (11) and the first air inlet (9). The first air outlet (11) is located lower than the first air inlet (9). The heating mechanism (14) includes a steam generator (141), a vacuum pump (142), a first insulation pipe (143), a second insulation pipe (144), and a third insulation pipe (145). The first insulation pipe (143) is fixedly installed at the feed end of the steam generator (141) and the outlet end of the vacuum pump (142). The discharge end of the steam generator (141) is fixedly connected to one end of the second insulation pipe (144). The second insulation pipe (144) is located away from the steam generator. One end of the device (141) is closed, the second heat-insulating pipe (144) is connected to the second air inlet (10) and each first air inlet (9) at the pipe body away from the steam generator (141), the air inlet end of the vacuum pump (142) is connected to one end of the third heat-insulating pipe (145), the pipe body of the third heat-insulating pipe (145) is connected to the second air outlet (12) and each first air outlet (11), and the end of the third heat-insulating pipe (145) away from the vacuum pump (142) is closed.

2. The sterilizer for syringes according to claim 1, characterized in that: A three-way reversing valve (15) is installed between the discharge end of the steam generator and the second insulation pipe (144). The three-way reversing valve (15) is connected to a first air inlet pipe (16). A heating box (18) is fixedly installed at the end of the first air inlet pipe (16) away from the three-way reversing valve (15). An electric heating grid (19) is fixedly installed inside the heating box (18). A second air inlet pipe (17) is fixedly installed on the side of the heating box (18) away from the first air inlet pipe (16). The electric heating grid (19) is located between the first air inlet pipe (16) and the second air inlet pipe (17). The three-way reversing valve (15) is used to control the connection between the second insulation pipe (144) and the steam generator, or between the second insulation pipe (144) and the first air inlet pipe (16).

3. A sterilizer for syringes according to claim 1, characterized in that: The bottom side of the outer cabinet (1) is provided with a plurality of drain holes (20) for communicating with the first heating chamber (7) and the second heating chamber (8). The outer cabinet (1) is provided with a drain pipe (25) and a filter (26). The body of the drain pipe (25) is connected to each of the drain holes (20). One end of the drain pipe (25) is closed. The other end of the drain pipe (25) is connected to the water inlet of the filter (26). A recycling box (31) is installed at the water outlet of the filter (26).

4. A sterilizer for syringes according to claim 3, characterized in that: A float (24) is provided above the baffle plate (13). A counterweight rod (22) is fixedly installed on the side of the float (24) near the baffle plate (13). The baffle plate (13) has a through hole (21) through which the counterweight rod (22) passes. The diameter of the counterweight rod (22) is smaller than the diameter of the through hole (21). A limit rod (23) is fixedly installed at the end of the counterweight rod (22) away from the float (24). The limit rod (23) is used to restrict the counterweight rod (22) from being pulled out of the through hole (21).

5. A sterilizer for syringes according to claim 1, characterized in that: The vacuum mechanism (4) includes a vacuum pump (41), an extraction pipe (42), a third air inlet pipe (43), and a second valve (44). One end of the extraction pipe (42) is connected to the air inlet of the vacuum pump (41). One end of the third air inlet pipe (43) and the other end of the extraction pipe (42) pass through the outer cabinet (1) and connect to the inside of the inner cabinet (2). The second valve (44) is fixedly installed on the third air inlet pipe (43).

6. A sterilizer for syringes according to claim 1, characterized in that: The humidification mechanism (27) includes a humidifier (271) and a humidification pipe (272). One end of the humidification pipe (272) is connected to the discharge end of the humidifier (271), and the other end of the humidification pipe (272) passes through the outer cabinet (1) and connects to the inside of the inner cabinet (2).

7. A method for producing a syringe, comprising using a syringe sterilizer as described in any one of claims 1-6, characterized in that, Includes the following steps: Fabricate the outer tube, core rod, injection needle, and piston, and print graduations on the outer tube; assemble the outer tube, core rod, injection needle, and piston into a syringe; package each syringe in an ethylene oxide-permeable bag; package multiple syringes in an ethylene oxide-permeable box; package multiple boxes of syringes in an ethylene oxide-permeable crate; sterilize the crates of syringes in a sterilizer; place the sterilized syringes in a desorption chamber for desorption; store the desorbed syringes in a warehouse. The sterilization of the boxed syringes in the sterilization cabinet includes the following steps: the boxed syringes are placed in the inner cabinet (2) and the cabinet door (3) is closed; the vacuum mechanism (4) is activated to evacuate the inside of the inner cabinet (2), the heating mechanism (14) is activated to heat the inner cabinet (2), and the humidification mechanism (27) is activated to adjust the humidity inside the inner cabinet (2); the first valve (30) is opened to allow the ethylene oxide tank (28) to introduce ethylene oxide into the inner cabinet (2) for sterilization; after sterilization, the vacuum mechanism (4) is alternately driven to extract the ethylene oxide inside the inner cabinet (2) and allow air to enter the inner cabinet (2); after the ethylene oxide is extracted, the sterilized syringes are placed in the analysis chamber for analysis.

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