Special ethylene oxide sterilizer for disposable hygienic products

Abstract

The utility model relates to the technical field of ethylene oxide sterilizers, in particular to an ethylene oxide sterilizer special for disposable hygienic products, which is characterized in that a pressure regulating device adopts a stepping vacuum mode, so that the pressure in a sterilizer box body gradually enters a set pressure; then completely gasified EO gas is injected into the sterilizer box body through a dosing device until the concentration is 300-800 mg / L, and the temperature is maintained and controlled to be 30-50 DEG C, so that the sterilization effect is improved; comprising a sterilizer box body and a sterilizer door body, a pick-and-place opening is formed in the sterilizer box body, and the sterilizer door body is installed at the pick-and-place opening; the sterilizer further comprises a steam device, a pressure regulating device, a dosing device and a heating device, the steam device is arranged on the sterilizer box body in a communicating manner and is used for conveying steam into the sterilizer box body, the pressure regulating device is communicated with the sterilizer box body and is used for regulating the pressure in the sterilizer box body, and the dosing device is communicated with the sterilizer box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ethylene oxide sterilizer, especially to a kind of ethylene oxide sterilizer special for disposable sanitary products. BACKGROUND

[0002] Disposable sanitary products refer to single-use sanitary products designed to collect human waste and be recycled or discarded as solid waste after use. They are mainly made of multiple layers of natural fibers and polymers, including absorbent layer, flow guide layer and two non-woven fabrics. These products are usually used for daily consumption of human hygiene and directly or indirectly contact with the human body to achieve the purpose of human physiological hygiene or health care. However, the use of microbial sanitary products that exceed the standard can easily cause health problems, and people often ignore this during use.

[0003] GB15979-2024 "Hygienic Requirements for Disposable Sanitary Products" requires that disposable sanitary products meet hygiene indicators. Products of disinfection level and above need to be disinfected and sterilized. The most commonly used method is ethylene oxide sterilization.

[0004] Disposable sanitary products are mostly fully plastic packaged, with poor air permeability. The traditional sterilizer and sterilization process require a too fast vacuum extraction rate, which causes rapid changes in the internal and external differences of the package, leading to bagging. According to tests, the bag explosion rate of ordinary sterilization process exceeds 5%.

[0005] Excessive humidity can cause condensation on the product surface, leading to product deformation and affecting sales.

[0006] Due to the characteristics of ethylene oxide absorption of disposable sanitary products, if the analysis is poor, the residual amount will exceed the standard (>10 μg / g), which does not meet the standard of GB / T16886.7.

[0007] The characteristics of disposable sanitary products require the development of a special sterilizer and sterilization process to address the above challenges. SUMMARY

[0008] To solve the above technical problems, the utility model provides a kind of through pressure regulating device adopts step-by-step vacuum mode, makes the sterilizer box gradually enter to set pressure, simultaneously utilizes steam device to the sterilizer box and humidifies processing, then through dosing device injects the EO gas of complete gasification to the sterilizer box to the concentration 300-800mg / L, maintains temperature control 30~50℃, improves the sterilization effect of the sanitary products special for ethylene oxide sterilizer.

[0009] The utility model discloses a kind of ethylene oxide sterilizers special for disposable sanitary products, including sterilizer box and sterilizer door body, and the sterilizer box is provided with taking and placing opening, and sterilizer door body is installed at taking and placing opening;It further includes steam device, pressure regulating device, dosing device and heating device, steam device is communicated and set on the sterilizer box, and steam device is used to deliver steam in the sterilizer box, and pressure regulating device is communicated with the sterilizer box, and pressure regulating device is used to adjust pressure in the sterilizer box, and dosing device is communicated with the sterilizer box, and dosing device is used to add ethylene oxide gas in the sterilizer box, and heating device is communicated with the sterilizer box, and heating device is used to heat in the sterilizer box;The sanitary product needing sterilization is placed into the sterilizer box, and the sterilizer door body is closed, then the sanitary product is preheated to 30~50 DEG C by heating device, then the sterilizer box is gradually entered into set pressure by pressure regulating device using step vacuum mode, and the sterilizer box is humidified by steam device, then the sterilizer box is injected with completely gasified EO gas to concentration 300-800mg / L by dosing device, temperature control is maintained at 30~50 DEG C, humidity is 50~70RH, pressure maintaining time is 4-8 hours, after sterilization, immediately enter ventilation stage, accelerate EO from product and resolve, after analysis, the sterilizer restores to atmospheric pressure, complete all sterilization process, improve sterilization effect.

[0010] Preferably, the steam device includes a steam evaporator, a dry steam humidifier, a steam filter, a humidifier pneumatic ball valve, a humidification stop valve, and a drain valve. The steam evaporator is connected in sequence to the dry steam humidifier, the steam filter, the humidifier pneumatic ball valve, and the humidification stop valve. The output end of the steam evaporator is connected to the sterilizer box, and the drain valve is connected to the dry steam humidifier and the steam filter. Steam generated by the steam evaporator is delivered to the dry steam humidifier, and the dry steam humidifier releases latent heat of steam to heat the steam evaporator again to improve the dryness of the steam. The steam filter filters impurities in the steam, the humidifier pneumatic ball valve controls the opening and closing of humidification, and the humidification stop valve controls the humidification rate, so that the steam enters the sterilizer box to avoid excessive humidification and deformation of the sanitary product. The drain valve is used to drain excess water from the dry steam humidifier and the steam filter.

[0011] Preferably, the heating device comprises an air filter, a venting proportional valve, a plate heat exchanger, a circulating fan, a circulating air heating sleeve, a circulating air heating sleeve water inlet valve, a tank heating circulation water inlet valve, a pipe heater and a circulating water pump, the air filter is connected with the venting port of the sterilizer tank through the venting proportional valve and the plate heat exchanger, the air suction port of the circulating fan is connected with the air return port of the sterilizer tank, the air supply port of the circulating fan is connected with the air supply port of the sterilizer tank through the circulating air heating sleeve, the self-circulation of the gas in the cabinet is realized, the outlet of the pipe heater is also connected with the inlet of the circulating water pump through the circulating air heating sleeve, the circulating water pump is connected with the water inlet port and the water return port of the sterilizer tank through the pipe heater, and the circulating air heating sleeve water inlet valve and the tank heating circulation water inlet valve are arranged in communication between the circulating air heating sleeve and the pipe heater; the pipe heater provides heat source for air intake heating and circulating air heating, the circulating water pump is used for circulating hot water in the pipe heater and the plate heat exchanger, and the plate heat exchanger heats the air entering from the air filter, wherein the venting proportional valve adjusts the venting rate to avoid the bag from being burst due to too fast venting rate, and in the sterilization and analysis stage, the hot air can accelerate the analysis rate of ethylene oxide.

[0012] Preferably, the pressure regulating device comprises a vacuum proportional valve, a vacuum pump, a vacuum valve, a pressure balance valve and a pressure sensor, the vacuum pump is connected with the vacuum port of the sterilizer tank through the vacuum valve, a bypass is arranged between the vacuum pump and the vacuum valve, the vacuum proportional valve is connected with the bypass, a bypass is arranged between the sterilizer tank and the vacuum valve, the pressure balance valve is connected with the bypass, the vacuum proportional valve is directly connected with air, the pressure balance valve is connected with a nitrogen pipeline, and the pressure sensor is arranged on the door body of the sterilizer and communicates with the sterilizer tank; the vacuum rate is adjusted by adjusting the opening degree of the vacuum proportional valve, the pressure balance valve and the pressure sensor are mutually fed back, are used for balancing the air pressure when the pressure of the sterilizer tank suddenly drops, preventing the product from being burst, once the pressure or the rate is abnormal, the pressure balance valve is automatically opened by the program to avoid the risk of bag burst, nitrogen is supplemented in time to balance the pressure change in the cabinet, after sterilization is completed, immediately enters the ventilation stage, the vacuum valve extracts the air in the sterilizer tank at a set speed, the venting proportional valve is opened at the same time, the heated air is injected into the cabinet, the cabinet is ensured to continuously be at-3 to-10 kpa, and the circulating air is heated to heat the inside of the sterilizer and the product and accelerate the EO from the product.

[0013] Preferably, the dosing device comprises a dosing proportional valve, a check valve, an ethylene oxide gasification device and an ethylene oxide dosing device, the EO gas inlet is connected with the dosing port on the circulating air heating sleeve through the ethylene oxide dosing device, the ethylene oxide gasification device, the check valve and the dosing proportional valve; the EO gas is conveniently brought into the sterilizer tank through the circulating air for sterilization.

[0014] Preferably, the temperature sensor is installed on the sterilizer door body and communicates with the sterilizer box body; the convenience of temperature detection in the sterilizer box body is improved.

[0015] Preferably, the humidity sensor is installed on the sterilizer door body and communicates with the sterilizer box body; the pulse humidification method is adopted for humidification, and a small amount of pure dry steam is added for multiple times to ensure the accuracy of humidification through the double action of the humidity sensor and the pressure sensor of the sterilizer box body.

[0016] Compared with the prior art, the utility model has the beneficial effects that: the sanitary products needing sterilization treatment are placed in the sterilizer box body, the sterilizer door body is closed, then the sanitary products are preheated to 30-50 DEG C through the heating device, then the step vacuum mode is adopted through the pressure adjusting device, the sterilizer box body gradually enters the set pressure, the sterilizer box body is humidified through the steam device, then the complete gasification EO gas is injected into the sterilizer box body through the dosing device to the concentration 300-800mg / L, the temperature control is maintained at 30-50 DEG C, the humidity is 50-70 RH, the pressure maintaining time is 4-8 hours, after sterilization, immediately enter the ventilation stage, accelerate the EO from the product, after the analysis is completed, the sterilizer restores to atmospheric pressure, completes the whole sterilization process, improves the sterilization effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the axonometric structure schematic view of the utility model;

[0018] Figure 2 is the local structure schematic view of vacuum pump and vacuum valve connection;

[0019] Figure 3 is the local structure schematic view of ethylene oxide gasification device and ethylene oxide dosing device connection;

[0020] Figure 4 is the local structure schematic view of steam evaporator and dry steam humidifier connection.

[0021] The attached diagram is labeled as follows: 1. Steam evaporator; 2. Dry steam humidifier; 3. Steam filter; 4. Humidifying pneumatic ball valve; 5. Humidifying shut-off valve; 6. Sterilizer chamber; 7. Air filter; 8. Venting proportional valve; 9. Plate heat exchanger; 10. Circulating fan; 11. Dosing proportional valve; 12. Check valve; 13. Ethylene oxide vaporization device; 14. Ethylene oxide metering dosing device; 15. Circulating air heating sleeve; 16. Circulating air heating sleeve inlet valve; 17. Chamber heating circulating water inlet valve; 18. Pipe heater; 19. Circulating water pump; 20. Vacuum proportional valve; 21. Vacuum pump; 22. Vacuum valve; 23. Pressure balancing valve; 24. Sterilizer door; 25. Humidity sensor; 26. Temperature sensor; 27. Pressure sensor; 28. Drain valve. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0023] Example 1

[0024] like Figures 1 to 4 As shown, this utility model discloses an ethylene oxide sterilizer specifically for disposable hygiene products, comprising a sterilizer housing 6 and a sterilizer door 24. The sterilizer housing 6 is provided with an access port, and the sterilizer door 24 is installed at the access port. It also includes a steam device, a pressure regulating device, a dosing device, and a heating device. The steam device is connected to the sterilizer housing 6 and is used to supply steam into the sterilizer housing 6. The pressure regulating device is connected to the sterilizer housing 6 and is used to regulate the pressure inside the sterilizer housing 6. The dosing device is connected to the sterilizer housing 6 and is used to add ethylene oxide gas into the sterilizer housing 6. The heating device is connected to the sterilizer housing 6 and is used to heat the inside of the sterilizer housing 6.

[0025] like Figure 1 As shown, the steam device includes a steam evaporator 1, a dry steam humidifier 2, a steam filter 3, a humidifier pneumatic ball valve 4, a humidifier shut-off valve 5, and a steam trap 28. The steam evaporator 1 is connected in sequence to the dry steam humidifier 2, the steam filter 3, the humidifier pneumatic ball valve 4, and the humidifier shut-off valve 5. The output end of the steam evaporator 1 is connected to the sterilizer housing 6. The steam trap 28 is connected to the dry steam humidifier 2 and the steam filter 3.

[0026] In this embodiment, the sanitary products to be sterilized are placed inside the sterilizer chamber 6 and the sterilizer door 24 is closed. The sanitary products are then preheated to 30-50°C using a heating device. Next, a pressure regulating device is used to gradually bring the sterilizer chamber 6 to the set pressure using a step vacuum method. Simultaneously, a steam device is used to humidify the sterilizer chamber 6. Then, a dosing device injects fully vaporized EO gas into the sterilizer chamber 6 to a concentration of 300-800 mg / L. The temperature is maintained at 30-50°C, and the humidity at 50-70% RH. The pressure holding time is 4-8 hours. After sterilization, a ventilation phase is immediately initiated to accelerate the release of EO from the product. After the release is complete, the sterilizer is restored to atmospheric pressure, completing the entire sterilization process and improving the sterilization effect.

[0027] Example 2

[0028] Based on Example 1, such as Figure 1 As shown, this utility model discloses an ethylene oxide sterilizer specifically for disposable hygiene products. The heating device includes an air filter 7, a venting proportioning valve 8, a plate heat exchanger 9, a circulating fan 10, a circulating air heating sleeve 15, a circulating air heating sleeve inlet valve 16, a chamber heating circulating water inlet valve 17, a pipe heater 18, and a circulating water pump 19. The air filter 7 is connected to the vent of the sterilizer chamber 6 via the venting proportioning valve 8 and the plate heat exchanger 9. The air intake of the circulating fan 10 is connected to the sterilizer chamber 6. The return air outlet is connected, and the air outlet of the circulating fan 10 is connected to the air outlet of the sterilizer box 6 through the circulating air heating sleeve 15 to realize the self-circulation of the gas in the cabinet. The outlet of the pipe heater 18 is also connected to the inlet of the circulating water pump 19 through the circulating air heating sleeve 15. The circulating water pump 19 is connected to the water inlet and return water outlet of the sterilizer box 6 through the pipe heater 18 respectively. The water inlet valve 16 of the circulating air heating sleeve and the circulating water inlet valve 17 of the box heating are connected and set between the circulating air heating sleeve 15 and the pipe heater 18.

[0029] like Figure 2 As shown, the pressure regulating device includes a vacuum proportional valve 20, a vacuum pump 21, a vacuum valve 22, a pressure balancing valve 23, and a pressure sensor 27. The vacuum pump 21 is connected to the vacuum port of the sterilizer chamber 6 through the vacuum valve 22. A bypass is provided between the vacuum pump 21 and the vacuum valve 22, and the vacuum proportional valve 20 is connected to the bypass. A bypass is provided between the sterilizer chamber 6 and the vacuum valve 22, and the pressure balancing valve 23 is connected to the bypass. The vacuum proportional valve 20 is directly connected to the air, and the pressure balancing valve 23 is connected to the nitrogen pipeline. The pressure sensor 27 is installed on the sterilizer door 24 and is connected to the sterilizer chamber 6.

[0030] like Figure 3As shown, the dosing device includes a dosing proportioning valve 11, a check valve 12, an ethylene oxide vaporization device 13, and an ethylene oxide metering dosing device 14. The EO gas filling port is connected to the dosing port on the circulating air heating sleeve 15 through the ethylene oxide metering dosing device 14, the ethylene oxide vaporization device 13, the check valve 12, and the dosing proportioning valve 11.

[0031] like Figure 1 As shown, it also includes a temperature sensor 26, which is installed on the sterilizer door 24 and connected to the sterilizer chamber 6.

[0032] like Figure 1 As shown, it also includes a humidity sensor 25, which is installed on the sterilizer door 24 and connected to the sterilizer chamber 6.

[0033] In this embodiment, steam is generated by steam evaporator 1 and delivered to dry steam humidifier 2. Dry steam humidifier 2 releases the latent heat of steam to reheat the steam generated by steam evaporator 1, increasing the dryness of the steam. Steam filter 3 filters impurities in the steam. Humidifier pneumatic ball valve 4 controls the on / off of humidification. Humidification shut-off valve 5 controls the humidification rate, thereby allowing steam to enter the sterilizer chamber 6, avoiding excessive humidification that could cause sanitary products to become wet and deformed. Drain valve 28 is used to drain excess water from dry steam humidifier 2 and steam filter 3. Pipe heater 18 provides a heat source for heating the intake air and circulating air. Circulating water pump 19 circulates hot water in pipe heater 18 and plate heat exchanger 9. Plate heat exchanger 9 heats the air entering through air filter 7. Venting ratio valve 8 adjusts the venting rate to prevent the venting rate from being too fast and causing the bag to burst. During the sterilization desorption stage, hot air can accelerate the desorption rate of ethylene oxide.

[0034] This utility model discloses an ethylene oxide sterilizer specifically for disposable hygiene products. During operation, the hygiene products to be sterilized are placed inside the sterilizer chamber 6, and the sterilizer door 24 is closed. The hygiene products are then preheated to 30-50°C using a heating device. Next, a pressure regulating device uses a step-vacuum method to gradually bring the sterilizer chamber 6 to the set pressure. Simultaneously, a steam device humidifies the sterilizer chamber 6. Then, a dosing device injects fully vaporized EO gas into the sterilizer chamber 6 to a concentration of 300-800 mg / L. The temperature is maintained at 30-50°C, and the humidity at 50-70% RH. The pressure holding time is 4-8 hours. After sterilization, a ventilation phase immediately begins to accelerate the release of EO from the product. After the release is complete, the sterilizer returns to atmospheric pressure, completing the entire sterilization process.

[0035] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An ethylene oxide sterilizer specifically for disposable hygiene products, comprising a sterilizer housing (6) and a sterilizer door (24), wherein the sterilizer housing (6) is provided with an access port, and the sterilizer door (24) is installed at the access port; characterized in that, It also includes a steam device, a pressure regulating device, a dosing device, and a heating device. The steam device is connected to the sterilizer chamber (6) and is used to supply steam to the sterilizer chamber (6). The pressure regulating device is connected to the sterilizer chamber (6) and is used to regulate the pressure inside the sterilizer chamber (6). The dosing device is connected to the sterilizer chamber (6) and is used to add ethylene oxide gas to the sterilizer chamber (6). The heating device is connected to the sterilizer chamber (6) and is used to heat the inside of the sterilizer chamber (6).

2. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, The steam device includes a steam evaporator (1), a dry steam humidifier (2), a steam filter (3), a humidifier pneumatic ball valve (4), a humidification shut-off valve (5), and a steam trap (28). The steam evaporator (1) is connected in sequence to the dry steam humidifier (2), the steam filter (3), the humidifier pneumatic ball valve (4), and the humidification shut-off valve (5). The output end of the steam evaporator (1) is connected to the sterilizer housing (6). The steam trap (28) is connected to the dry steam humidifier (2) and the steam filter (3).

3. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, The heating device includes an air filter (7), a venting proportional valve (8), a plate heat exchanger (9), a circulating fan (10), a circulating air heating sleeve (15), a circulating air heating sleeve inlet valve (16), a chamber heating circulating inlet valve (17), a pipe heater (18), and a circulating water pump (19). The air filter (7) is connected to the vent of the sterilizer chamber (6) through the venting proportional valve (8) and the plate heat exchanger (9). The air intake of the circulating fan (10) is connected to the return air inlet of the sterilizer chamber (6). The air outlet is connected to the air outlet of the sterilizer body (6) through the circulating air heating sleeve (15) to realize the self-circulation of the gas in the cabinet. The outlet of the pipe heater (18) is also connected to the inlet of the circulating water pump (19) through the circulating air heating sleeve (15). The circulating water pump (19) is connected to the water inlet and water outlet of the sterilizer body (6) through the pipe heater (18). The circulating air heating sleeve water inlet valve (16) and the body heating circulating water inlet valve (17) are connected and set between the circulating air heating sleeve (15) and the pipe heater (18).

4. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, The pressure regulating device includes a vacuum proportional valve (20), a vacuum pump (21), a vacuum valve (22), a pressure balancing valve (23), and a pressure sensor (27). The vacuum pump (21) is connected to the vacuum port of the sterilizer chamber (6) through the vacuum valve (22). A bypass is set between the vacuum pump (21) and the vacuum valve (22), and the vacuum proportional valve (20) is connected to the bypass. The vacuum proportional valve (20) is directly connected to the air, and the pressure balancing valve (23) is connected to the nitrogen pipeline. The pressure sensor (27) is set on the sterilizer door (24) and communicates with the sterilizer chamber (6).

5. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, The dosing device includes a dosing proportioning valve (11), a check valve (12), an ethylene oxide vaporization device (13), and an ethylene oxide metering dosing device (14). The EO gas filling port is connected to the dosing port on the circulating air heating sleeve (15) through the ethylene oxide metering dosing device (14), the ethylene oxide vaporization device (13), the check valve (12), and the dosing proportioning valve (11).

6. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, It also includes a temperature sensor (26), which is installed on the sterilizer door (24) and connected to the sterilizer chamber (6).

7. The ethylene oxide sterilizer for disposable hygiene products as described in claim 1, characterized in that, It also includes a humidity sensor (25), which is installed on the sterilizer door (24) and connected to the sterilizer chamber (6).

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