Pulsation vacuum steam sterilizer

Abstract

The utility model discloses a pulsating vacuum steam sterilizer, which belongs to the technical field of sterilization equipment and is characterized in that an outlet of a vacuum pump is connected with a buffer water tank, the buffer water tank is vertically arranged, a plurality of water filter screen plates are mounted in the buffer water tank from top to bottom, an emptying port is arranged at the top of the buffer water tank, and the emptying port is communicated with the vacuum pump. The side part of the buffer water tank is provided with a water outlet, the bottom of the buffer water tank is provided with a drain outlet, the lower part of the sterilization chamber is communicated with an air return pipeline, and the air return pipeline is provided with a sterile air filter, a heater and an air return valve; according to the utility model, water vapor can be filtered and separated through the water filter screen plate, the environmental pollution caused by direct discharge of the vapor is avoided, and the sterile air filter and the heater are arranged on the air return pipeline, so that the reliability of the sterilization process is further ensured, and a good sterilization effect is maintained.

Description

Technical Field

[0001] This utility model relates to the field of sterilization equipment technology, and in particular to a pulsed vacuum steam sterilizer. Background Technology

[0002] Pulsating vacuum steam sterilizers play a crucial role in hospital supply rooms. They can effectively sterilize various medical supplies using high-temperature, high-pressure steam, with a sterilization temperature range precisely controlled between 121°C and 134°C. This characteristic allows them to adapt to and meet the sterilization needs of many different types of medical supplies, demonstrating excellent sterilization results in practical applications.

[0003] However, in terms of the current technological development of pulsed vacuum steam sterilizers both domestically and internationally, there are still some shortcomings that urgently need to be addressed:

[0004] Firstly, during the drying process, the residual steam in the sterilization chamber cannot be discharged in a timely and sufficient manner, which to some extent limits the further improvement of the drying effect of sterilized items.

[0005] Secondly, the equipment directly discharges steam during operation. This high-temperature and high-pressure steam is released into the environment, which will inevitably cause a certain degree of pollution to the surrounding environment. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a pulsed vacuum steam sterilizer that can better guarantee the sterilization effect and improve the dryness of sterilized items while ensuring the original high temperature and high pressure steam sterilization.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a pulsed vacuum steam sterilizer, including a sterilization chamber and a jacket fitted outside the sterilization chamber. A steam extraction pipe is connected to the upper part of the sterilization chamber, and a vacuum pump is connected to the other end of the steam extraction pipe. An upper vacuum valve is installed on the steam extraction pipe. A return air pipe is connected to the lower part of the sterilization chamber, and a sterile air filter, a heater, and a return air valve are installed on the return air pipe. The inlet of the vacuum pump is connected to a tap water pipe, the inlet of the vacuum pump is connected to the steam extraction pipe, and the outlet of the vacuum pump is connected to a buffer water tank. The buffer water tank is vertically arranged, and several filter screens are installed inside the buffer water tank from top to bottom. An air vent is provided at the top of the buffer water tank, a drain outlet is provided on the side of the buffer water tank, and a sewage outlet is provided at the bottom of the buffer water tank.

[0008] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the pulsed vacuum steam sterilizer described above, the water inlet of the vacuum pump is connected to the tap water pipe through water inlet pipe I, water inlet pipe I is connected to the lower part of the buffer water tank through water inlet branch pipe, and the tap water pipe is connected to the middle part of the buffer water tank through water inlet pipe II.

[0009] The technical problem to be solved by this utility model can also be further achieved by the following technical solution: For the above-mentioned pulsed vacuum steam sterilizer, the sterilizer also includes a heat exchanger I, the hot section of the heat exchanger I is connected in series with the steam exhaust pipe, and the cold section of the heat exchanger I is connected in series with the water inlet pipe II.

[0010] The technical problem to be solved by this utility model can also be further achieved by the following technical solution: For the above-mentioned pulsed vacuum steam sterilizer, the sterilizer also includes a heat exchanger II, the hot end of the heat exchanger II is connected in series with the water inlet pipe I, and the cold end of the heat exchanger II is connected in series with the water inlet pipe II.

[0011] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned pulsating vacuum steam sterilizer, the water filter screen is provided with 4, and the air outlet is provided with 3.

[0012] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the pulsed vacuum steam sterilizer described above, the bottom of the sterilization chamber and the jacket are connected to the inlet of the vacuum pump through exhaust water pipes, and exhaust water control valves are installed on the exhaust water pipes.

[0013] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned pulsed vacuum steam sterilizer, a water filter is also installed on the tap water pipe.

[0014] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned pulsed vacuum steam sterilizer, both the sterilization chamber and the jacket are connected to a steam inlet pipe with a control valve, and both the sterilization chamber and the jacket are equipped with a safety valve, a pressure gauge and a pressure sensor.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. Improve the dryness of sterilized items: By using the upper vacuum valve and the return air valve, the residual steam in the sterilization chamber during drying can be removed in time, thereby better ensuring the sterilization effect and effectively improving the dryness of sterilized items.

[0017] 2. Reduce environmental pollution: The outlet of the vacuum pump is connected to a buffer water tank, which is equipped with several filter screens. When high-temperature and high-pressure steam is drawn out by the vacuum pump and enters the buffer water tank, the filter screens can filter and separate the water vapor, preventing the steam from being directly discharged and causing pollution to the environment. At the same time, the separated water can be discharged through the drain outlet and sewage outlet, realizing a more environmentally friendly steam treatment method.

[0018] 3. Ensure the cleanliness of the return air: Install sterile air filters and heaters on the return air ducts to filter the air returning to the sterilization chamber, remove microorganisms and particulate contaminants from the air, and at the same time raise the temperature of the air entering the sterilization chamber, further ensuring the reliability of the sterilization process and maintaining a good sterilization effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one structure of the present utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Reference Figure 1 A pulsed vacuum steam sterilizer includes a sterilization chamber 1 and a jacket 2 fitted outside the sterilization chamber 1. The sterilization chamber 1 serves as the main sterilization area. The internal space of the sterilization chamber 1 is rationally designed to accommodate various items that need to be sterilized. Its material is usually a special steel that is resistant to high temperature and high pressure and has good sealing performance to ensure that it can withstand the action of high temperature and high pressure steam during the sterilization process and prevent steam leakage. The jacket 2 is fitted outside the sterilization chamber 1, forming a certain space between it and the sterilization chamber 1. Its main function is to introduce steam during the sterilization process to preheat and assist in heating the sterilization chamber 1, improve sterilization efficiency, and make the temperature distribution inside the sterilization chamber 1 more uniform. The jacket 2 is also made of a high temperature and high pressure resistant material to ensure the stability and reliability of its structure.

[0022] Specifically:

[0023] A steam extraction pipe 3 is connected to the upper part of the sterilization chamber 1 to discharge steam from the sterilization chamber 1 as needed. The other end of the steam extraction pipe 3 is connected to a vacuum pump 5 to control the steam extraction process. An upper vacuum valve 4 is installed on the steam extraction pipe 3. During the drying stage of sterilization, the pressure and steam flow in the sterilization chamber 1 can be precisely controlled by opening or closing the upper vacuum valve 4. A return air pipe 6 is connected to the lower part of the sterilization chamber 1 to facilitate the replenishment of air into the sterilization chamber 1 during steam extraction, thereby better expelling steam and ensuring that residual steam is removed in time, further improving the drying effect of sterilized items. A sterile air filter 7, a heater 8, and a return air valve 9 are installed on the return air pipe 6 to ensure that the replenished air is sterile and that the temperature is close to that inside the sterilization chamber 1, preventing adverse effects on sterilized items due to excessive temperature differences, and also helping to maintain a stable temperature inside the sterilization chamber 1.

[0024] The vacuum pump 5 has its inlet connected to a tap water pipe 10, and its inlet connected to a steam extraction pipe 3 to extract steam from the sterilization chamber 1. The outlet of the vacuum pump 5 is connected to a buffer water tank 17 for further processing of the extracted steam. Preferably, the inlet of the vacuum pump 5 is connected to the tap water pipe 10 via an inlet pipe I12, and the inlet pipe I12 is connected to the lower part of the buffer water tank 17 via an inlet branch pipe 13. The tap water pipe 10 is connected to the middle part of the buffer water tank 17 via an inlet pipe II14. The inlet pipe I12 provides cooling water to the vacuum pump 5. Tap water enters the vacuum pump 5 through the inlet pipe I12 to cool the heat generated during operation, ensuring the vacuum pump 5 can operate normally and extending its service life. The water inlet branch pipe 13 is connected to the lower part of the buffer water tank 17. The purpose of this design is that, when necessary, the water in the buffer water tank 17 can also serve as the cooling water source for the vacuum pump 5, playing a certain supplementary and regulating role. When the inlet water pressure is low, the vacuum pump 5 can ensure that there is no shortage of water through the water in the buffer water tank 17, ensuring the water intake of the vacuum pump 5; when the inlet water pressure is too high, most of the inlet water enters the buffer water tank 17, ensuring that the vacuum pump 5 does not operate under high water pressure, ensuring the normal vacuuming of the vacuum pump 5, and reducing the noise of the vacuum pump 5. The water inlet pipe II is mainly used to replenish fresh water into the buffer water tank 17 to maintain a stable water level in the buffer water tank 17.

[0025] The sterilizer also includes a heat exchanger I15. The hot section of the heat exchanger I15 is connected in series with the steam extraction pipe 3, and the cold section of the heat exchanger I15 is connected in series with the water inlet pipe II14. When the steam flows through the hot section of the heat exchanger I15, it transfers heat to the tap water flowing through the cold section, raising the temperature of the tap water. This not only provides preliminary cooling for the steam but also recovers some of the heat energy from the steam, while avoiding direct steam discharge and thermal pollution to the environment.

[0026] The sterilizer also includes a heat exchanger II16. The hot end of the heat exchanger II16 is connected in series with the water inlet pipe I12, and the cold end of the heat exchanger II16 is connected in series with the water inlet pipe II14. The function of the heat exchanger II16 is to allow water from the buffer tank 17 to enter the vacuum pump 5 when the tap water pipe 10 is short of water. The water is also cooled by external water before entering the vacuum pump 5. In this way, the vacuum pump 5 has lower noise. Water affects the vacuum degree and noise of the vacuum pump 5. Cold water is beneficial to the vacuum pump 5 in drawing vacuum and at the same time reduces noise.

[0027] The buffer tank 17 can ensure the stable water pressure of the vacuum pump 5, and avoid the vacuum pump 5 from running out of water or the water pressure being too high; the steam discharged during the sterilization process is cooled by the heat exchanger and then discharged into the buffer tank 17 for buffering, which can realize the pressureless discharge of the sterilizer and control the temperature of the discharged water.

[0028] Preferably, the buffer tank 17 is arranged vertically, and several filter screens 18 are installed inside the buffer tank 17 from top to bottom. A drain port 20 is provided at the top of the buffer tank 17, a drain outlet 19 is provided on the side of the buffer tank 17, and a sewage outlet 21 is provided at the bottom of the buffer tank 17. More preferably, there are 4 filter screens 18 and 3 drain outlets 20.

[0029] In actual use, the bottoms of both the sterilization chamber 1 and the jacket 2 are connected to the inlet of the vacuum pump 5 via exhaust water pipes 22. Exhaust water control valves are installed on both exhaust water pipes 22. During sterilization, condensate will be generated in the sterilization chamber 1 and the jacket 2. By opening the exhaust water control valves, the condensate can be drained, preventing water accumulation from adversely affecting the sterilization effect and equipment operation. The exhaust water control valves can precisely control the exhaust water process, ensuring smooth operation.

[0030] A water filter 11 is also installed on the tap water pipe 10 to perform preliminary filtration of the tap water entering the equipment, remove large particles, sediment and other impurities in the water, protect the downstream equipment from the influence of impurities, extend the service life of the equipment, and at the same time help improve the water quality of the entire system and ensure the stability and reliability of the sterilization process.

[0031] Both sterilization chamber 1 and jacket 2 are connected to steam inlet pipes 23 with control valves. By opening and closing the control valves, the amount and pressure of steam entering sterilization chamber 1 and jacket 2 can be precisely controlled to meet the requirements of different sterilization processes. Both sterilization chamber 1 and jacket 2 are equipped with safety valves 24, pressure gauges, and pressure sensors. The pressure gauges are used to display the pressure values ​​inside sterilization chamber 1 and jacket 2 in real time, allowing operators to monitor the internal pressure of the equipment at any time. The pressure sensors convert the pressure signal into an electrical signal and transmit it to the control system to achieve precise monitoring and control of the pressure. The safety valve 24 is an important safety protection device. When the pressure inside sterilization chamber 1 or jacket 2 exceeds the set safety value, the safety valve 24 will automatically open to release some pressure, preventing dangerous accidents such as explosions due to excessive pressure and ensuring the safety of the equipment and operators.

[0032] The working principle of this application is as follows: During the sterilization process, steam is first introduced into the sterilization chamber 1 and the jacket 2 through the steam inlet pipe 23 to preheat and pre-sterilize the items to be sterilized. At the same time, the vacuum pump 5 starts to work and extracts the air and some steam in the sterilization chamber 1 through the steam extraction pipe 3 to form a negative pressure environment, so that the steam can better penetrate into the interior of the items to be sterilized and improve the sterilization effect.

[0033] After sterilization, the upper vacuum valve 4 is opened to perform vacuuming, which removes the steam from the sterilization chamber 1. The extracted steam is initially cooled by the heat exchanger I. The hot steam is not directly discharged into the environment, but then enters the buffer water tank 17. After being filtered and cooled by the filter screen plate 18 in the buffer water tank 17, the water and gas are separated. The gas is discharged through the vent 20, while the water is discharged through the drain 19 or recycled after treatment.

[0034] At the same time, the return air valve 9 is opened. After being filtered by the sterile air filter 7 and heated by the heater 8, the sterile air enters the sterilization chamber 1 through the return air pipe 6, so that the pressure in the sterilization chamber 1 gradually returns to the normal level. This ensures that the upper steam can be extracted in time during drying, and the hot air entering from the bottom can replace the residual steam in the sterilization chamber 1 in time, reducing the steam content in the sterilization chamber 1. This further enhances the dryness of the sterilized items.

[0035] Finally, open the exhaust water control valve to promptly drain the condensate in sterilization chamber 1 and jacket 2, thus completing the entire sterilization process.

Claims

1. A pulsed vacuum steam sterilizer, characterized in that: The system includes a sterilization chamber and a jacket fitted outside the sterilization chamber. A steam extraction pipe is connected to the upper part of the sterilization chamber, and a vacuum pump is connected to the other end of the steam extraction pipe. An upper vacuum valve is installed on the steam extraction pipe. A return air pipe is connected to the lower part of the sterilization chamber, and a sterile air filter, a heater, and a return air valve are installed on the return air pipe. The inlet of the vacuum pump is connected to a tap water pipe, the inlet of the vacuum pump is connected to the steam extraction pipe, and the outlet of the vacuum pump is connected to a buffer water tank. The buffer water tank is vertically arranged, and several filter screens are installed inside the buffer water tank from top to bottom. An air vent is provided at the top of the buffer water tank, a drain outlet is provided on the side of the buffer water tank, and a sewage outlet is provided at the bottom of the buffer water tank.

2. The pulsed vacuum steam sterilizer according to claim 1, characterized in that: The vacuum pump's inlet is connected to the tap water pipe via inlet pipe I. Inlet pipe I is connected to the lower part of the buffer tank via an inlet branch pipe. The tap water pipe is connected to the middle part of the buffer tank via inlet pipe II.

3. The pulsed vacuum steam sterilizer according to claim 2, characterized in that: The sterilizer also includes a heat exchanger I, the hot end of which is connected in series with the steam exhaust pipe, and the cold end of which is connected in series with the water inlet pipe II.

4. The pulsed vacuum steam sterilizer according to claim 3, characterized in that: The sterilizer also includes a heat exchanger II, the hot end of which is connected in series with the water inlet pipe I, and the cold end of which is connected in series with the water inlet pipe II.

5. The pulsed vacuum steam sterilizer according to claim 1, characterized in that: The filter screen is provided with 4 sections, and the drain outlet is provided with 3 sections.

6. The pulsed vacuum steam sterilizer according to claim 1, characterized in that: The bottom of both the sterilization chamber and the jacket is connected to the inlet of the vacuum pump via exhaust water pipes, and exhaust water control valves are installed on the exhaust water pipes.

7. The pulsed vacuum steam sterilizer according to claim 1, characterized in that: A water filter is also installed on the tap water pipe.

8. The pulsed vacuum steam sterilizer according to claim 1, characterized in that: Both the sterilization chamber and the jacket are connected to steam inlet pipes with control valves. Safety valves, pressure gauges, and pressure sensors are installed in both the sterilization chamber and the jacket.

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