Indicator resistance instrument and method for detecting steam formaldehyde sterilization
By integrating a variety of systems and technical means into the steam formaldehyde sterilization resistance instrument, the problem of insufficient safety and detection accuracy of existing equipment is solved, and a more efficient and accurate sterilization effect is achieved.
Patent Information
- Application Number
- CN202411897075.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-04-25
Smart Images
Figure CN119868611A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of low-temperature steam formaldehyde sterilization, in particular to an indicator resistance meter and method for detecting steam formaldehyde sterilization. Background Art
[0002] Formaldehyde gas has strong bactericidal power and a broad bactericidal spectrum. It can kill various microorganisms including bacterial spores. Formaldehyde gas does not damage the sterilized items and has strong penetrating power. Therefore, most items that are not suitable for sterilization by general methods can be disinfected and sterilized with steam formaldehyde, such as electronic instruments, optical instruments, medical equipment, chemical fibers, plastic products, wood products, ceramics and metal products, endoscopes, dialyzers and disposable diagnostic and medical supplies.
[0003] Since steam formaldehyde sterilization requires three conditions: vacuum resistance, moisture resistance, and temperature resistance of 60-80℃, its sterilization efficiency must be strictly verified before it is officially used. The first step in this verification process is to select suitable objects to be tested through resistance tests and accurately obtain their resistance indicators. Subsequently, based on these selected objects and combined with the collected resistance indicator data, detailed sterilization efficiency verification is carried out to ensure that the sterilization method achieves the desired effect.
[0004] In this technical field, resistance is defined as the ability of bacteria to prevent themselves from being inactivated. The core purpose of the sterilization resistance test is to accurately evaluate the resistance of various bacteria to inactivation treatment, that is, to quantitatively analyze the actual inactivation effect of steam formaldehyde sterilization equipment on various bacteria and its overall sterilization performance. Steam formaldehyde sterilization equipment, as a key sterilization tool for reuse of medical devices, its sterilization effect guarantee level and sterilization efficiency compliance degree need to be empirically tested through specific indicators. These indicators, including chemical and biological types, must follow unified testing standards to verify the complete inactivation status of standard bacterial samples on the indicator card. In order to ensure the uniformity and accuracy of each batch of indicators, strict resistance testing is required with the help of a steam formaldehyde sterilization resistance meter.
[0005] There are many types of bacteria. The national standard stipulates that only the detection of thermophilic Bacillus stearothermophilus spores and / or Bacillus subtilis spores is sufficient to represent the sterilization ability against most pathogenic bacteria.
[0006] Therefore, based on the above shortcomings, the present invention proposes an indicator resistance meter and method for detecting steam formaldehyde sterilization. Summary of the invention
[0007] The present invention provides an indicator resistance meter and method for detecting steam formaldehyde sterilization, so as to solve the problem that the safety and detection accuracy of the existing steam formaldehyde sterilization resistance meter need to be improved.
[0008] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an indicator resistance meter for detecting steam formaldehyde sterilization, comprising a shell, and a sterilization box, a control system, a monitoring system, a heating system, a ventilation system, a vacuum system, a decomposition system, a dosing system and a door sealing system arranged inside the shell, a paperless recorder is embedded on one side of the shell, and a door opening fan is installed on the top of the shell, a test port and an alarm are arranged on the sterilization box, and the sterilization box is connected to the heating system, the ventilation system, the vacuum system, the decomposition system, the dosing system and the door sealing system; The vacuum system is used to vacuum the interior of the sterilization box; The analytical system is used to inject water vapor into the sterilization box to replace the gas in the sterilization box; The heating system is used to uniformly heat the sterilization box to ensure that the steam formaldehyde is evenly distributed in the sterilization box, so that the object to be tested can fully contact with the steam formaldehyde in all areas of the box; The ventilation system is used to achieve ventilation inside the sterilization box; The door sealing system is used to seal the sterilization box to prevent gas leakage in the sterilization box and ensure the stability of the sterilization environment; The dosing system is used to add steam formaldehyde into the sterilization box; The monitoring system is used to detect the temperature and pressure inside the sterilization box in real time, which can ensure the safety of the sterilization environment; The control system is used to monitor and control the overall operation process of the steam formaldehyde sterilization indicator resistance meter to ensure that various functions are accurately executed.
[0009] Preferably, the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the vacuum system includes a vacuum pump installed in an outer shell, one end of the vacuum pump is connected to an atmospheric ejector, and a first pipeline is connected between the atmospheric ejector and the sterilization box, the vacuum pump is also connected to a pump drain pipe, and a one-way valve is installed on the pump drain pipe and the first pipeline, the vacuum pump is also connected to a pump water supply pipeline, and a water pressure detection gauge and a first pipeline solenoid valve are installed on the pump water supply pipeline, and the pump drain pipe directly discharges into a sealed sewer.
[0010] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the analysis system includes a water storage tank and an evaporator installed in an outer shell, a water pipe is connected between the water storage tank and the evaporator, and a first electromagnetic pump and a second pipeline solenoid valve distributed along the water flow direction are installed on the water pipe, a second pipeline is connected between the evaporator and the sterilization box, one end of the first pipeline is connected to the second pipeline, a pure water adding pipeline is also connected to the water storage tank, and a third pipeline solenoid valve is installed on the pure water adding pipeline.
[0011] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the heating system includes a heating plate arranged on the outer wall of the sterilization box, and a PID meter installed on one side of the sterilization box.
[0012] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the ventilation system includes a return valve installed on the top of the sterilization box.
[0013] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the door sealing system includes a sealing door which can be opened and closed and is installed on one side of the outer shell, and a door sealing air pump arranged in the outer shell, an inflation pipe is connected between the door sealing air pump and the sealing strip of the sealing door, and a pressure switch and a door solenoid valve are installed on the inflation pipe.
[0014] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the dosing system includes a manual dosing component, the manual dosing component includes a manual dosing port preset on the shell, a manual dosing pipeline is connected between the manual dosing port and the evaporator, and a fourth pipeline solenoid valve is installed on the manual dosing pipeline, the manual dosing port can be connected to an external syringe, and is used to inject formaldehyde solution into the evaporator, the evaporator has a heating function, and mainly vaporizes the formaldehyde solution in the syringe for subsequent sterilization operations; in addition, the manual dosing component is also provided with a temperature sensor, which is used to monitor the temperature state of the evaporator in real time to ensure stable operation of the system; It also includes an automatic drug adding component, which includes an automatic drug adding window arranged on the outer wall of the shell, and a medicine storage box installed inside the shell, an automatic drug adding pipeline connected to the medicine storage box and the evaporator, and a drug delivery pipe is connected between the medicine storage box and the first pipeline, a second electromagnetic pump and a fifth pipeline electromagnetic valve are installed on the automatic drug adding pipeline, a sixth pipeline electromagnetic valve is installed on the drug delivery pipe, an automatic drug adding bag can be placed on the automatic drug adding window, and a puncture tube is connected between the automatic drug adding bag and the medicine storage box.
[0015] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the monitoring system includes a pressure sensor and a temperature sensor installed on the top of the sterilization box.
[0016] Preferably, in the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, the control system is composed of a lower computer and a host computer, and the lower computer can adopt a PLC to control the operation of equipment in the system, and the host computer can adopt a touch screen to adjust the parameters of the lower computer, and the touch screen and the PLC are connected through a network cable.
[0017] A method for detecting an indicator resistance meter for steam formaldehyde sterilization, the method is applied to the above-mentioned indicator resistance meter for monitoring steam formaldehyde sterilization, and the steps of the method are as follows: S1. Add the formaldehyde solution in the external syringe into the pipeline through the manual dosing port; S2. Place the items to be sterilized into the sterilization system. The control system controls the heating system to heat the sterilization box, and keep it warm after heating to the specified temperature. S3. After the holding time is reached, the control system controls the vacuum pump in the vacuum system to start pumping out the air in the sterilization box until the vacuum degree in the cavity is no greater than the preset vacuum degree to maintain the pressure; S4. After the pressure holding time is reached, the manual dosing system is turned on to inject the formaldehyde solution in the pipeline into the sterilization box through the evaporator, and the sterilization timing is started; S5. After the sterilization timing ends, the control system controls the vacuum pump in the vacuum system to start pumping out the gas in the sterilization box; S6. After reaching the set pressure, the control system controls the analytical system to inject water vapor into the sterilization box. When the pressure of the sterilization box reaches the set value, the evacuation system is started again to extract the gas in the box. When the evacuation pressure reaches the lower limit, water vapor is injected into the sterilization box again. This cycle is repeated several times. S7, after reaching the number of cycles, enter the drying stage, and continue to vacuum until the drying time reaches the set time; S8. After the drying setting time is reached, the ventilation stage is entered. The control system controls the return valve and the vacuum system to act alternately. After the ventilation times are reached, the test is completed and the test object in the sterilization box is taken out.
[0018] In the above technical solution, the technical effects and advantages provided by the present invention are: (1) The present invention integrates a PID control instrument on the sterilization box to significantly improve the uniformity of the inner tank heating, thereby ensuring the rapid and uniform distribution of steam formaldehyde in the sterilization box. This design ensures that the objects to be tested in each area of the sterilization box can fully contact with the steam formaldehyde, thereby significantly enhancing the sterilization effect and further ensuring the accuracy of the test results.
[0019] (2) The present invention effectively controls the sterilization process through the coordinated operation of the upper computer and the lower computer, ensures the detection accuracy, and provides a convenient operating experience. During the monitoring process, the equipment will record in detail the key data such as temperature and time in the sterilization process, so that the detection personnel can comprehensively analyze and obtain accurate detection results. In addition, the device allows the user to flexibly adjust the parameters of the lower computer through the upper computer to achieve precise control of parameters such as temperature, pressure, and time in the sterilization process, thereby simulating a variety of different sterilization environments and achieving precise dosing, further expanding its applicable detection range.
[0020] (3) The present invention can be used to detect and evaluate the inactivation ability and sterilization efficiency of steam formaldehyde sterilization equipment on various bacteria, and can also be used as a sterilization equipment with diverse functions, which is convenient for users to select according to their needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 The overall structural diagram of the indicator resistance meter for detecting steam formaldehyde sterilization provided by the present invention; Figure 2 A schematic diagram of the pipeline of the indicator resistance meter for detecting steam formaldehyde sterilization provided by the present invention; Figure 3 A flow chart of a method for detecting an indicator resistance meter for steam formaldehyde sterilization provided by the present invention; In the figure: 1. Manual dosing port; 2. Automatic dosing window; 3. Paperless recorder; 4. Door opening fan; 5. Touch screen; 6. Shell; 7. Sealed door; 8. Sterilization box; 9. Medicine storage box; 10. Water storage tank; 11. Vacuum pump; 12. Puncture tube; 13. Atmospheric ejector; 14. Test port; 15. Monitoring system; 1501. Pressure sensor; 1502. Temperature sensor; 16. Return valve; 17. Pressure switch; 18. Door seal air pump; 19. Door solenoid valve; 20. Second solenoid pump; 21. Sixth pipeline solenoid valve; 22. Evaporator; 23. Check valve; 24. Water pressure test gauge; 25. Pump drain pipe; 26. Heating system; 2601. Heating plate; 2602. PID instrument; 27. Pure water adding pipeline; 28. Manual dosing pipeline; 29. Automatic dosing pipeline; 30. Pump adding pipeline. DETAILED DESCRIPTION
[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0024] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it may be located directly or indirectly on the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and are not to be construed as limitations on the present technical solution. The terms "first", "second", etc. are only used for the convenience of description and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.
[0025] The present invention provides Figure 1 and 2 The indicator resistance meter for detecting steam formaldehyde sterilization shown in the figure comprises a shell 6, and a sterilization box 8, a control system, a monitoring system 15, a heating system 26, a ventilation system, a vacuum system, an analytical system, a dosing system and a door sealing system arranged inside the shell 6. A paperless recorder 3 is embedded on one side of the shell 6, and a door opening fan 4 is installed on the top of the shell 6. A test port 14 and an alarm are arranged on the sterilization box 8. The alarm can sound an alarm to alert the staff, and the alarm items include the upper limit of sterilization pressure, the upper limit of sterilization temperature, the lower limit of sterilization temperature, the vacuum timeout, the lower limit of evaporator 22 temperature, the upper limit of evaporator 22 temperature, and the low water pressure detection. The sterilization box 8 is connected with the heating system 26, the ventilation system, the vacuum system, the analytical system, the dosing system and the door sealing system. The vacuum system is used to evacuate the interior of the sterilization box 8 to ensure that the internal environment of the sterilization box 8 reaches a vacuum state; The analytical system is used to inject water vapor into the sterilization box 8 to replace the gas in the sterilization box 8 to ensure the sterilization effect; The heating system 26 is used to heat the sterilization box 8 uniformly, ensuring that the steam formaldehyde is evenly distributed in the sterilization box 8, so that the object to be tested can fully contact with the steam formaldehyde in all areas of the box, which not only helps the steam formaldehyde to be quickly and evenly distributed in the box, but also ensures that the object to be tested can fully contact with the steam formaldehyde, thereby ensuring the accuracy of the test results; The ventilation system is used to achieve ventilation inside the sterilization box 8 to ensure a stable environment; The door sealing system is used to achieve the sealing of the sterilization box 8 to prevent gas leakage in the sterilization box 8; The dosing system is used to add steam formaldehyde into the sterilization box 8; The monitoring system 15 is used to detect the temperature and pressure inside the sterilization box 8 in real time; The control system is used to monitor and control the overall operation process of the steam formaldehyde sterilization indicator resistance meter to ensure the safety, effectiveness and accuracy of the entire sterilization process.
[0026] like Figure 2 As shown, in a preferred example, the vacuum system includes a vacuum pump 11 installed in the outer shell 6, one end of the vacuum pump 11 is connected to an atmospheric ejector 13, and a first pipeline is connected between the atmospheric ejector 13 and the sterilization box 8, the vacuum pump 11 is also connected to a pump drain pipe 25, and a one-way valve 23 is installed on the pump drain pipe 25 and the first pipeline, the vacuum pump 11 is also connected to a pump water supply pipeline 30, and a water pressure detection gauge 24 and a first pipeline solenoid valve are installed on the pump water supply pipeline 30, formaldehyde gas is a toxic gas, and the gas in the sterilization box 8 is pumped out by the vacuum pump 11 to a sealed sewer after sterilization to prevent exhaust gas from escaping, thereby ensuring the health of production personnel, and is non-polluting to the environment after being diluted with a large amount of water, making the production process green and environmentally friendly.
[0027] like Figure 2 As shown, in a preferred example, the analysis system includes a water tank 10 and an evaporator 22 installed in an outer shell 6, a water pipe is connected between the water tank 10 and the evaporator 22, and a first electromagnetic pump and a second pipeline solenoid valve distributed along the water flow direction are installed on the water pipe, a second pipeline is connected between the evaporator 22 and the sterilization box 8, one end of the first pipeline is connected to the second pipeline, a pure water adding pipeline 27 is also connected to the water tank 10, and a third pipeline solenoid valve is installed on the pure water adding pipeline 27.
[0028] like Figure 2 As shown, in a preferred embodiment, the heating system 26 includes a heating plate 2601 arranged on the outer wall of the sterilization box 8, and a PID instrument 2602 installed on one side of the sterilization box 8. The PID instrument 2602 can make the heat distribution of the sterilization box 8 uniform, and the steam formaldehyde is evenly distributed in the sterilization box 8, so that the steam formaldehyde is in full contact with the items to be sterilized, thereby ensuring the sterilization effect, and at the same time can also shorten the sterilization time and improve the sterilization efficiency.
[0029] like Figure 2 As shown, in a preferred embodiment, the ventilation system includes a return valve 16 installed on the top of the sterilization box 8. The return valve 16 and the vacuum pump 11 are connected to the sterilization box 8. The return valve 16 can be opened when the sterilization box 8 is at a certain vacuum degree, so as to fill air into the sterilization box 8. When the air reaches a certain pressure, the vacuum pump 11 is opened to extract the gas inside the sterilization box 8 to reach a certain pressure, and the return valve 16 is opened again. This is repeated many times to enhance the ventilation inside the sterilization box 8, further reduce the concentration of residual formaldehyde, and improve safety.
[0030] like Figure 2As shown, in a preferred example, the door sealing system includes a sealing door 7 which is opened and closed and is installed on one side of the outer shell 6, and a door sealing air pump 18 which is arranged in the outer shell 6. An inflation pipe is connected between the door sealing air pump 18 and the sealing strip of the sealing door 7, and a pressure switch 17 and a door solenoid valve 19 are installed on the inflation pipe.
[0031] like Figure 2 As shown, in a preferred embodiment, the dosing system includes a manual dosing component, the manual dosing component includes a manual dosing port 1 preset on the housing 6, a manual dosing pipeline 28 is connected between the manual dosing port 1 and the evaporator 22, and a fourth pipeline solenoid valve is installed on the manual dosing pipeline 28; the formaldehyde solution in the external syringe is injected into the manual dosing pipeline 28, the evaporator 22 is used to vaporize the formaldehyde solution in the pipeline, the manual dosing system is also provided with a temperature sensor, the temperature sensor is used to monitor the temperature of the evaporator 22, when dosing, the formaldehyde solution in the manual dosing pipeline 28 is heated and vaporized and then passed to the sterilization box 8, the temperature of the evaporator 22 after vaporization is monitored by the temperature sensor to prevent the temperature from being too low and the vaporization from being insufficient, when the temperature of the evaporator 22 is too low, the heater of the evaporator 22 starts to heat and keep the temperature of the evaporator 22 constant; The dosing system also includes an automatic dosing component including an automatic dosing window 2 arranged on the outer wall of the shell 6, and a medicine storage box 9 installed inside the shell 6, an automatic dosing pipeline 29 connecting the medicine storage box 9 and the evaporator 22, and a medicine delivery tube is connected between the medicine storage box 9 and the first pipeline, a second electromagnetic pump 20 and a fifth pipeline electromagnetic valve are installed on the automatic dosing pipeline 29, a sixth pipeline electromagnetic valve 21 is installed on the medicine delivery tube, an automatic dosing bag can be placed on the automatic dosing window 2, and a puncture tube 12 is connected between the automatic dosing bag and the medicine storage box 9.
[0032] like Figure 2 As shown, in a preferred example, the monitoring system 15 includes a pressure sensor 1501 and a temperature sensor 1502 installed on the top of the sterilization box 8, so that the temperature and pressure inside the sterilization box 8 can be monitored, so that the situation inside the sterilization box 8 can be monitored in real time. When an abnormality occurs, timely adjustments can be made to ensure the safety and effectiveness of sterilization, and the sterilization environment inside the sterilization box 8 can be monitored in real time to ensure the accuracy of the test results.
[0033] like Figure 2As shown, in a preferred embodiment, the control system is composed of a lower computer and a host computer, and the lower computer can adopt PLC to control the operation of the equipment in the system, and the host computer can adopt touch screen 5 to adjust the parameters of the lower computer, and the touch screen 5 is connected to the PLC through a network cable. The lower computer is responsible for controlling the operation of the equipment in the system, and the host computer is used to adjust the relevant parameters of the lower computer. This system covers multiple modules such as heating system 26, ventilation system, vacuum system, analytical system, dosing system, door sealing system, etc., and each pipeline is provided with an electromagnetic control valve as a control valve. The driving device of each system and each control valve are electrically connected to the lower computer, and the switch state thereof is uniformly controlled by the lower computer. At the same time, the operator can flexibly adjust the parameters according to actual needs through the host computer. This collaborative working mode of the upper computer and the lower computer not only improves the control accuracy of the sterilization process, but also greatly simplifies the operation process.
[0034] In summary, when the inspector selects the manual dosing system as the dosing system, the entire system is a resistance meter; when the inspector selects the automatic dosing system as the dosing system, the entire system is a sterilization equipment.
[0035] Based on the above embodiments, the present invention also provides a method for detecting the resistance of an indicator of steam formaldehyde sterilization, such as Figure 3 As shown, the method is applied to an indicator resistance meter for monitoring steam formaldehyde sterilization in the above embodiment, and the steps of the method are specifically as follows: S1, add the formaldehyde solution in the external syringe into the pipeline through the manual dosing port 1; S2, placing the items to be sterilized into the sterilization system, and the control system controls the heating system 26 to heat the sterilization box 8, and then heats it to a specified temperature and keeps it warm; S3, after the holding time is reached, the control system controls the vacuum pump 11 in the vacuum system to start pumping out the air in the sterilization box 8 until the vacuum degree in the cavity is no greater than the preset vacuum degree to maintain the pressure; S4, after the pressure holding time is reached, the manual dosing system is turned on to inject the formaldehyde solution in the pipeline into the sterilization box 8 through the evaporator 22, and the sterilization timing is started; S5, after the sterilization timing ends, the control system controls the vacuum pump 11 in the vacuum system to start pumping out the gas in the sterilization box 8; S6. After reaching the set pressure, the control system controls the analytical system to inject water vapor into the sterilization box 8. When the pressure of the sterilization box 8 reaches the set value, the evacuation system is started again to extract the gas in the box. When the evacuation pressure reaches the lower limit, water vapor is injected into the sterilization box 8 again. This cycle is repeated several times. S7, after reaching the number of cycles, enter the drying stage, and continue to vacuum until the drying time reaches the set time; S8, after reaching the set drying time, the ventilation stage is entered, and the control system controls the return valve 16 and the vacuum system to act alternately. After reaching the ventilation times, the test is completed and the test object in the sterilization box 8 is taken out.
[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. An indicator resistance instrument for detecting steam formaldehyde sterilization, characterized in that: The invention comprises a housing (6), a sterilization box (8) arranged inside the housing (6), a control system, a monitoring system (15), a heating system (26), a ventilation system, a vacuum system, a desorption system, a dosing system and a door sealing system, wherein a paperless recorder (3) is embedded on one side of the housing (6), and a door opening fan (4) is installed on the top of the housing (6), a test port (14) and an alarm are arranged on the sterilization box (8), and the sterilization box (8) is connected to the heating system (26), the ventilation system, the vacuum system, the desorption system, the dosing system and the door sealing system; The vacuum system is used to vacuum the interior of the sterilization box (8); The analytical system is used to inject water vapor into the sterilization box (8) to replace the gas in the sterilization box (8); The heating system (26) is used to uniformly heat the sterilization box (8) to ensure that the steam formaldehyde is evenly distributed in the sterilization box (8), so that the object to be tested can fully contact the steam formaldehyde in all areas of the box; The ventilation system is used to achieve ventilation inside the sterilization box (8); The door sealing system is used to achieve sealing of the sterilization box (8) to prevent gas leakage in the sterilization box (8); The dosing system is used to add steam formaldehyde into the sterilization box (8); The monitoring system (15) is used to detect the temperature and pressure inside the sterilization box (8) in real time; The control system is used to monitor and control the overall operation process of the steam formaldehyde sterilization indicator resistance instrument.
2. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The vacuum pumping system comprises a vacuum pump (11) installed in a housing (6); one end of the vacuum pump (11) is connected to an atmospheric ejector (13); a first pipeline is connected between the atmospheric ejector (13) and the sterilization box (8); a pump drain pipe (25) is also connected to the vacuum pump (11); a check valve (23) is installed on the pump drain pipe (25) and the first pipeline; the vacuum pump (11) is also connected to a pump water supply pipeline (30); a water pressure detection gauge (24) and a first pipeline solenoid valve are installed on the pump water supply pipeline (30).
3. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 2, characterized in that: The analytical system comprises a water storage tank (10) and an evaporator (22) installed in a housing (6); a water delivery pipe is connected between the water storage tank (10) and the evaporator (22); a first electromagnetic pump and a second pipeline electromagnetic valve are installed on the water delivery pipe and are distributed along the water flow direction; a second pipeline is connected between the evaporator (22) and the sterilization box (8); one end of the first pipeline is connected to the second pipeline; a pure water supply pipeline (27) is also connected to the water storage tank (10); and a third pipeline electromagnetic valve is installed on the pure water supply pipeline (27).
4. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The heating system (26) comprises a heating plate (2601) arranged on the outer wall of the sterilization box (8), and a PID instrument (2602) installed on one side of the sterilization box (8).
5. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The ventilation system comprises a return valve (16) installed at the top of the sterilization box (8).
6. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The door sealing system comprises a sealing door (7) which is installed on one side of a housing (6) and can be opened and closed, and a door sealing air pump (18) which is arranged in the housing (6); an air filling pipe is connected between the door sealing air pump (18) and a sealing strip of the sealing door (7); and a pressure switch (17) and a door solenoid valve (19) are installed on the air filling pipe.
7. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 2, characterized in that: The dosing system comprises a manual dosing component, the manual dosing component comprises a manual dosing port (1) preset on the housing (6), a manual dosing pipeline (28) is connected between the manual dosing port (1) and the evaporator (22), and a fourth pipeline solenoid valve is installed on the manual dosing pipeline (28); The invention also comprises an automatic drug adding component, the automatic drug adding component comprising an automatic drug adding window (2) arranged on the outer wall of the housing (6), and a drug storage box (9) installed inside the housing (6); an automatic drug adding pipeline (29) connecting the drug storage box (9) and the evaporator (22); a drug delivery pipe is connected between the drug storage box (9) and the first pipe; a second electromagnetic pump (20) and a fifth pipeline electromagnetic valve are installed on the automatic drug adding pipeline (29); a sixth pipeline electromagnetic valve (21) is installed on the drug delivery pipe; an automatic drug adding bag can be placed on the automatic drug adding window (2); and a puncture tube (12) is connected between the automatic drug adding bag and the drug storage box (9).
8. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The monitoring system (15) comprises a pressure sensor (1501) and a temperature sensor (1502) installed at the top of the sterilization box (8).
9. The indicator resistance meter for detecting steam formaldehyde sterilization according to claim 1, characterized in that: The control system is composed of a lower computer and an upper computer, and the lower computer may adopt a PLC for controlling the operation of equipment in the system, and the upper computer may adopt a touch screen (5) for adjusting parameters of the lower computer, and the touch screen (5) and the PLC are connected via a network cable.
10. A method for detecting the resistance of an indicator for steam formaldehyde sterilization, characterized in that: The method is applied to an indicator resistance meter for monitoring steam formaldehyde sterilization according to any one of claims 1 to 9, and the steps of the method are specifically as follows: S1, adding the formaldehyde solution in the external syringe into the pipeline through the manual dosing port (1); S2, placing the items to be sterilized into the sterilization system, and the control system controls the heating system (26) to heat the sterilization box (8), and then heats it to a specified temperature and then keeps it warm; S3, after the holding time is reached, the control system controls the vacuum pump (11) in the vacuum system to start pumping out the air in the sterilization box (8) until the vacuum degree in the cavity is no greater than the preset vacuum degree to maintain the pressure; S4, after the pressure holding time is reached, the manual dosing system is turned on to inject the formaldehyde solution in the pipeline into the sterilization box (8) through the evaporator (22), and the sterilization timing is started; S5, after the sterilization timing ends, the control system controls the vacuum pump (11) in the vacuum system to start pumping out the gas in the sterilization box (8); S6. After reaching the set pressure, the control system controls the analytical system to inject water vapor into the sterilization box (8). When the pressure of the sterilization box (8) reaches the set value, the evacuation system is started again to extract the gas in the box. When the evacuation pressure reaches the lower limit, water vapor is injected into the sterilization box (8) again. This cycle is repeated several times. S7, after reaching the number of cycles, enter the drying stage, and continue to vacuum until the drying time reaches the set time; S8. After the set drying time is reached, the ventilation phase is entered, and the control system controls the return valve (16) and the vacuum system to operate alternately. After the ventilation times are reached, the test is completed and the test object in the sterilization box (8) is taken out.