CN210078382U

CN210078382U - Biological safety type high-pressure sterilizer

Info

Publication number: CN210078382U
Application number: CN201920551039.0U
Authority: CN
Inventors: 汤华山; 童骁; 王振; 邹靖; 彭诚; 高歌; 刘波波; 宋冬林; 袁志明
Original assignee: Wuhan Institute of Virology of CAS
Current assignee: Wuhan Institute of Virology of CAS
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-02-18
Anticipated expiration: 2029-04-22

Abstract

The utility model discloses a biological safety type autoclave, including stainless steel tubular cavity, stainless steel tubular cavity both ends are the open end, two open ends of stainless steel tubular cavity are all sealed the pressure and are equipped with the door plant, outer loop mounting groove and inner ring mounting groove have been seted up on the ring terminal surface of the open end of stainless steel tubular cavity, be provided with outer loop sealing washer in the outer loop mounting groove, the inner ring mounting inslot is provided with inner ring sealing washer, lie in on the ring terminal surface of the open end of stainless steel tubular cavity and seted up the inflation tank between outer loop mounting groove and the inner ring mounting groove, door plant and outer loop sealing washer and the sealed laminating of inner ring sealing washer, the utility model discloses control is nimble, reduces the accident that the sealing washer damage brought, tail gas multi-stage filtration.

Description

Biological safety type high-pressure sterilizer

Technical Field

The utility model belongs to the technical field of the sterilization experimental apparatus, concretely relates to biological safety type autoclave is applicable to the sterilization of the rubbish that the infectious etiology experiment produced.

Background

And sterilizing the garbage in the closed cavity by utilizing damp and hot steam. 1. In the prior art, an exhaust valve of a cavity is closed, steam is injected into the cavity, the cavity is heated in a closed state, and the exhaust valve is opened for exhausting after sterilization is finished. The method has the following defects: the steam enters in a stuffy mode, and because the temperature rise time is long, a lot of condensed water is generated in the 2 stages of temperature rise and sterilization maintenance in the cavity and is accumulated in the cavity, the sterilization effect is influenced, and meanwhile, the drying effect of the sterilized articles is limited. This patent is taken the tail gas valve to open always, then injects steam through control and realizes rising temperature and sterilization to the cavity, and the accurate control of temperature can be realized to the advantage, and the evacuation drying effect is very good after guaranteeing the sterilization. The sterilized articles are dry and convenient to handle.

2. The prior art is that steam is the independent pipeline of steam when injecting steam into the cavity, the defect: the pressure of the steam may thus be higher than the jacket pressure, resulting in large temperature control fluctuations. This patent is preheated through the advanced cover that presss from both sides of steam and is reached the uniform temperature after, in letting the steam that presss from both sides the cover pass through a control valve access cavity, the actual input steam pressure in can guaranteeing the cavity like this always is less than the steam pressure that presss from both sides the cover, is a safety protection design, and the temperature control fluctuation of cavity is also very little in addition, convenient control.

3. Prior art, press from both sides cover and cavity and all install the relief valve, have 2 relief valves, the defect: one more pipeline port is arranged in the inner cavity, so that the biological safety risk is increased, and the manufacturing cost is increased. This patent has been solved, only needs the installation to press from both sides the cover relief valve, can realize the safety guarantee, reduces biological safety risk.

4. In the prior art, a temperature sensor in a cavity is fixed on the cavity, and a sensor for detecting in an inserted article does not exist independently, and the defects are as follows: the real sterilization temperature of the articles in the sterilization process is not accurate enough, the sensor is bad or insensitive, and the sensor cannot be found in time, and no reference is provided. This patent, the cavity internal fixation has 2 sensors, contrast, and the sensor that inserts article the inside in addition still has specially, still two probes, and 4 temperatures can both show, can realize the accurate control of sterilization in-process temperature to and the sensor trouble is discover immediately, has guaranteed biological safety.

5. In the prior art, after the cavity is compressed by the door plate, sterilization is started, and the risk of aging and leakage of the door plate sealing ring exists. This patent has been solved, and the cavity door compresses tightly the back of closing, and timely sealing washer takes place to reveal, also can guarantee thoroughly to kill, guarantees biological safety.

6. The prior art is as follows: most of control systems are single-chip microcomputers, programs are inconvenient to upgrade, and detection means are limited. This patent has been solved, has taken PLC control, possesses the computer and inserts the program function that refreshes, and the design has PLC to the point detection function of each signal simultaneously, convenient maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a biosafety type autoclave,

the utility model discloses a following technical scheme realizes:

the utility model provides a biological safety type autoclave, including stainless steel cylindrical cavity, stainless steel cylindrical cavity both ends are the open end, two open ends of stainless steel cylindrical cavity are all sealed to press and are equipped with the door plant, outer loop mounting groove and inner ring mounting groove have been seted up on the ring terminal surface of the open end of stainless steel cylindrical cavity, be provided with outer loop seal circle in the outer loop mounting groove, be provided with inner ring seal circle in the inner ring mounting groove, it has seted up the gas cell to lie in between outer loop mounting groove and the inner ring mounting groove on the ring terminal surface of the open end of stainless steel cylindrical cavity, the door plant is sealed with outer loop seal circle and inner ring seal.

The air charging groove is provided with an air charging port and an air discharging port, the air charging port is connected with a compressed air source through a second pneumatic diaphragm valve, the air charging port is further connected with an air outlet of the steam generator through a first pneumatic diaphragm valve, the air discharging port is connected with a hot air inlet of the water-cooled heat exchanger through a ninth pneumatic diaphragm valve, and a hot air outlet of the water-cooled heat exchanger is connected with the water-sealed vacuum pump.

The bottom of the stainless steel cylindrical cavity is provided with a cavity steam inlet, the top of the stainless steel cylindrical cavity is provided with a cavity exhaust port, the stainless steel cylindrical cavity is sleeved with a jacket, the steam outlet of a steam generator is connected with one end of a third pneumatic diaphragm valve, the other end of the third pneumatic diaphragm valve is respectively connected with the air inlet of the jacket, the air inlet of the jacket is provided with a jacket temperature sensor and a first safety valve, the air outlet of the jacket is connected with the cavity steam inlet through a one-way valve and an eighth pneumatic diaphragm valve in sequence, the air outlet of the jacket is provided with a second drain valve,

the cavity gas vent is connected with fourth pneumatic diaphragm valve one end, the fourth pneumatic diaphragm valve other end is provided with exhaust temperature sensor and is connected with first air cleaner one end, the first air cleaner other end is connected with second air cleaner one end, the second air cleaner other end is connected with fifth pneumatic diaphragm valve one end and sixth pneumatic diaphragm valve one end respectively, the fifth pneumatic diaphragm valve other end is connected with steam generator's gas outlet, the sixth pneumatic diaphragm valve other end passes through activated carbon filter and is connected with the hot gas inlet of water-cooled heat exchanger.

The second safety valve is arranged at the air outlet of the steam generator, and the first drain valve is further arranged at the air outlet of the steam generator.

The biosafety type autoclave also comprises an intracavity pressure sensor for measuring the pressure in the stainless steel cylindrical cavity, an intracavity temperature sensor for measuring the temperature in the stainless steel cylindrical cavity and a needle type temperature sensor for measuring the temperature of an article to be sterilized in the stainless steel cylindrical cavity.

An external air inlet is further formed in the stainless steel cylindrical cavity and connected with one end of a third air filter, and a seventh pneumatic diaphragm valve is arranged at the other end of the third air filter.

Compared with the prior art, the utility model, have following advantage:

1. after the mechanical pressure is tightly sealed, a steam protection barrier is formed between the outer ring sealing ring and the inner ring sealing ring, once leakage occurs, the steam barrier can instantly kill the leaked pathogenic microorganisms, and the biological safety in the sterilization process is greatly improved;

2. aiming at tail gas emission:

in the traditional sterilizer, after the gas in the cavity is sealed and heated for sterilization, the tail gas discharge valve is opened. The tail gas has peculiar smell;

in the sterilization process, the fourth pneumatic diaphragm valve (tail gas pipeline valve) is opened all the time, and tail gas is discharged after being filtered by the 3-stage filter. Tail gas is discharged after being deodorized;

3. aiming at the condition of generating condensed water in the cavity:

in the traditional sterilizer, because steam is heated under a closed condition, excessive condensed water is generated by the steam in the cavity, and even if the steam is vacuumized after sterilization is finished, partial condensed water also remains, so that the sterilized articles are inconvenient to take out;

according to the invention, after the jacket is preheated, jacket steam is input into the stainless steel cylindrical cavity, so that condensed water cannot be generated in the stainless steel cylindrical cavity in the temperature rising process;

4. aiming at the steam entering mode:

in the traditional sterilizer, the tail gas pipeline control valve is closed when the sterilizer is fed downwards, and the temperature is raised;

in the invention, the air enters from the lower part and goes up from the upper part, the fourth pneumatic diaphragm valve (tail gas pipeline valve) is opened all the time, and the temperature is continuously increased;

5. setting for a temperature sensor:

in the traditional sterilizer, a cavity is monitored by a single temperature sensor;

according to the invention, the stainless steel cylindrical cavity adopts double temperature sensors, so that real temperature is guaranteed through real-time comparison.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of a conventional door panel connection structure;

fig. 3 is a schematic view of the connection structure of the door panel of the present invention.

In the figure: 1-a first pneumatic diaphragm valve, 2-a second pneumatic diaphragm valve, 3-a third pneumatic diaphragm valve, 4-a fourth pneumatic diaphragm valve, 5-an exhaust temperature sensor, 6-a first air filter, 7-a fifth pneumatic diaphragm valve, 8-a second air filter, 9-a sixth pneumatic diaphragm valve, 10-an active carbon filter, 11-a first door plate, 12-a first outer ring sealing ring, 13-a first inner ring sealing ring, 14-an intracavity pressure sensor, 15-a first intracavity temperature sensor, 16-a jacket temperature sensor, 17-a first safety valve, 18-a needle type temperature sensor, 19-a second intracavity temperature sensor, 20-a third air filter, 21-a seventh pneumatic diaphragm valve, 22-a cavity exhaust port, 23-a second outer ring sealing ring, 24-a second inner ring sealing ring, 25-a second door plate, 26-a jacket, 27-a cavity steam inlet, 28-a stainless steel cylindrical cavity, 29-a second safety valve, 30-a steam generator, 31-a first drain valve, 32-a second drain valve, 33-a one-way valve, 34-an eighth pneumatic diaphragm valve, 35-a ninth pneumatic diaphragm valve, 36-a water-cooled heat exchanger and 37-a water-sealed vacuum pump; 38-existing chamber; 39-existing gaskets; 40-existing door panels; 41-outer ring mounting groove; 42-inner ring mounting groove; 43-outer ring seal ring; 44-inner ring sealing ring; 45-air charging groove.

Detailed Description

To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

Example 1:

the utility model provides a biological safety type autoclave, including stainless steel cylindrical cavity 28, stainless steel cylindrical cavity 28 both ends are the open end, two open ends of stainless steel cylindrical cavity 28 are all sealed the pressure and are equipped with the door plant, outer loop mounting groove 41 and inner ring mounting groove 42 have been seted up on the ring terminal surface 46 of the open end of stainless steel cylindrical cavity 28, be provided with outer ring seal 43 in the outer loop mounting groove 41, be provided with inner ring seal 44 in the inner ring mounting groove 42, it has seted up inflation tank 45 to lie in between outer loop mounting groove 41 and the inner ring mounting groove 42 on the ring terminal surface 46 of the open end of stainless steel cylindrical cavity 28, the door plant is sealed laminating with outer loop seal 43 and inner ring seal 44.

Be provided with inflation inlet and relief port on the gas charging groove 45, the inflation inlet passes through second pneumatic diaphragm valve 2 and is connected with compressed air source, and the inflation inlet still is connected with steam generator 30's gas outlet through first pneumatic diaphragm valve 1, and the relief port passes through ninth pneumatic diaphragm valve 35 and is connected with water-cooled heat exchanger 36's steam inlet, and water-cooled heat exchanger 36's steam outlet and water-sealed vacuum pump 37 are connected.

A cavity steam inlet 27 is arranged at the bottom of the stainless steel cylindrical cavity 28, a cavity exhaust port 22 is arranged at the top of the stainless steel cylindrical cavity 28, a jacket 26 is sleeved on the stainless steel cylindrical cavity 28, an air outlet of a steam generator 30 is connected with one end of a third pneumatic diaphragm valve 3, the other end of the third pneumatic diaphragm valve 3 is respectively connected with an air inlet of the jacket 26, a jacket temperature sensor 16 and a first safety valve 17 are arranged at an air inlet of the jacket 26, an air outlet of the jacket 26 is connected with the cavity steam inlet 27 sequentially through a one-way valve 33 and an eighth pneumatic diaphragm valve 34, a second drain valve 32 is arranged at an air outlet of the jacket 26,

the cavity air vent 22 is connected with one end of a fourth pneumatic diaphragm valve 4, the other end of the fourth pneumatic diaphragm valve 4 is provided with an exhaust temperature sensor 5 and is connected with one end of a first air filter 6, the other end of the first air filter 6 is connected with one end of a second air filter 8, the other end of the second air filter 8 is connected with one end of a fifth pneumatic diaphragm valve 7 and one end of a sixth pneumatic diaphragm valve 9 respectively, the other end of the fifth pneumatic diaphragm valve 7 is connected with an air outlet of a steam generator 30, and the other end of the sixth pneumatic diaphragm valve 9 is connected with a hot air inlet of a water-cooled heat exchanger 36 through an activated carbon filter 10.

A second relief valve 29 is provided at the outlet of the steam generator 30, and a first trap 31 is also provided at the outlet of the steam generator 30.

The biosafety type autoclave further comprises an intracavity pressure sensor 14 for measuring the pressure in the stainless steel cylindrical cavity 28, intracavity temperature sensors (a first intracavity temperature sensor 15 and a second intracavity temperature sensor 19) for measuring the temperature in the stainless steel cylindrical cavity 28, and a needle temperature sensor 18 for measuring the temperature of an article to be sterilized in the stainless steel cylindrical cavity 28.

An external air inlet is further formed in the stainless steel cylindrical cavity 28 and connected with one end of the third air filter 20, and a seventh pneumatic diaphragm valve 21 is arranged at the other end of the third air filter 20.

In the application, the first pneumatic diaphragm valve 1, the second pneumatic diaphragm valve 2, the third pneumatic diaphragm valve 3, the fourth pneumatic diaphragm valve 4, the exhaust temperature sensor 5, the first air filter 6, the fifth pneumatic diaphragm valve 7, the sixth pneumatic diaphragm valve 9, the intracavity pressure sensor 14, the first intracavity temperature sensor 15, the jacket temperature sensor 16, the first safety valve 17, the needle temperature sensor 18, the second intracavity temperature sensor 19, the seventh pneumatic diaphragm valve 21, the second safety valve 29, the steam generator 30, the first drain valve 31, the second drain valve 32, the check valve 33, the eighth pneumatic diaphragm valve 34, the ninth pneumatic diaphragm valve 35 and the water-sealed vacuum pump 37 can all be connected with the PLC control module, and have an independent programming function. The vacuum rate and times of vacuum pumping during the sterilization process can be set, and the temperature and duration of the sterilization maintenance phase of the sterilizer can be set.

Door plates (11, 25) are arranged at two open ends of the stainless steel cylindrical cavity 28 in a sealing and pressing mode, the part of the outer ring sealing ring exposed out of the outer ring mounting groove and the part of the inner ring sealing ring exposed out of the inner ring mounting groove are compressed and sealed by the door plates, the inflating groove between the outer ring mounting groove and the inner ring mounting groove is filled with steam, the part of the outer ring sealing ring exposed out of the outer ring mounting groove and the part of the inner ring sealing ring exposed out of the inner ring mounting groove are also filled with steam to form a steam barrier, then the stainless steel cylindrical cavity 28 is vacuumized, the jacket 26 is preheated and heated by introducing steam into the jacket 26 to reach a temperature favorable for sterilization, the preheating is finished, the steam of the jacket 26 enters the stainless steel cylindrical cavity 28, the heating sterilization in the stainless steel cylindrical cavity 28 is realized, and the steam pressure in the stainless steel cylindrical cavity 28 can be ensured to, the temperature in the cavity can be conveniently controlled and adjusted, and the pressure of the jacket can be safely protected. Timing when the temperature in the cavity reaches the temperature required by sterilization, vacuumizing and drying the cavity after timing is finished, and finishing drying.

Example 2:

a method of sterilizing goods using the biosafety autoclave of example 1, comprising the steps of:

step 1, setting a first pneumatic diaphragm valve 1, a second pneumatic diaphragm valve 2, a third pneumatic diaphragm valve 3, a fourth pneumatic diaphragm valve 4, a fifth pneumatic diaphragm valve 7, a sixth pneumatic diaphragm valve 9, an eighth pneumatic diaphragm valve 34 and a ninth pneumatic diaphragm valve 35 to be in a closed state. The seventh pneumatic diaphragm valve 21 is in an open state.

Step 2, the steam generator 30 generates steam through electric heating, the temperature range is 135-138 ℃, and the temperature is maintained at 3.5bar (0.35 Mpa);

step 3, putting the article to be sterilized into the stainless steel cylindrical cavity 28, inserting the needle-type temperature sensor 18 into the article to be sterilized or wrapping the article to be sterilized, and hermetically pressing a first door panel (11) and a second door panel (25) at two open ends of the stainless steel cylindrical cavity 28;

step 4, opening the first pneumatic diaphragm valve 1 and the ninth pneumatic diaphragm valve 35, and after waiting for 5 minutes, closing the ninth pneumatic diaphragm valve 35 (for the purpose of forming a steam barrier by the door plate sealing ring);

step 5, opening a fourth pneumatic diaphragm valve 4 and a sixth pneumatic diaphragm valve 9, starting a water-sealed vacuum pump 37 to vacuumize, and stopping vacuumizing until the vacuum degree in the cavity of the stainless steel cylindrical cavity 28 is below 0.1bar (0.01 Mpa) (the purpose of vacuumizing is to reduce uneven temperature rise in the cavity and reduce the influence of air on the sterilization process);

step 6, opening a third pneumatic diaphragm valve 3, and waiting for the temperature of the jacket temperature sensor 16 to rise to 123 ℃ required by sterilization and heating; due to the design of the second trap 32, 3.5bar steam from the steam generator can be passed into the jacket 26.

Step 7, opening an eighth pneumatic diaphragm valve 34, closing a seventh pneumatic diaphragm valve 21, allowing steam in the jacket 26 to enter a cavity of the stainless steel cylindrical cavity 28 through a one-way valve 33, and heating the temperature sensors (15 and 19) in the cavity to be close to 115 ℃;

step 8, intermittently opening and closing the eighth pneumatic diaphragm valve 34 and the fourth pneumatic diaphragm valve 4, wherein the opening-closing time ratio of the eighth pneumatic diaphragm valve 34 is greater than or equal to the opening-closing time ratio of the fourth pneumatic diaphragm valve 4, and the opening-closing time ratio is the ratio of the opening time to the closing time in one opening-closing cycle, in this embodiment, after the eighth pneumatic diaphragm valve 34 is opened for 1 second (opening time), the eighth pneumatic diaphragm valve is closed for 5 seconds (closing time), then the eighth pneumatic diaphragm valve is opened for 1 second, then the eighth pneumatic diaphragm valve is closed for 5 seconds, the fourth pneumatic diaphragm valve 4 is intermittently controlled, the fourth pneumatic diaphragm valve is opened for 1 second (opening time), and then the eighth pneumatic diaphragm valve is closed for 10 seconds (closing time), 2 pneumatic diaphragm valves are repeatedly controlled to provide steam for the cavity of the stainless steel cylindrical cavity, and finally the temperature measured by the needle type temperature sensor 18 for measuring the articles to be; and the eighth pneumatic diaphragm valve 34 and the fourth pneumatic diaphragm valve 4, 2 valves are controlled to be opened and closed intermittently, so that the temperature rise in the sterilization process is accurately controlled.

Step 9, maintaining the temperature measured by the needle type temperature sensor 18 between 121 ℃ and 123 ℃ for 30 minutes, and finishing the sterilization maintenance;

step 10, closing the first pneumatic diaphragm valve 1, the 3 rd pneumatic diaphragm valve 3 and the eighth pneumatic diaphragm valve 34;

step 11, opening a ninth pneumatic diaphragm valve 35, a fourth pneumatic diaphragm valve 4 and a sixth pneumatic diaphragm valve 9, starting a water-sealed vacuum pump 36 for vacuumizing and drying, discharging tail gas in the stainless steel cylindrical cavity through a cavity exhaust port 22, sequentially passing through a first air filter 6, a second air filter 8 and an active carbon filter 10, deodorizing the active carbon filter 10, cooling through a water-cooled heat exchanger 36, and then discharging through the water-sealed vacuum pump 37; vacuumizing by the water-sealed vacuum pump 37 to reduce the pressure P1 in the stainless steel cylindrical cavity to below 0.1bar, and maintaining for 5 minutes to finish drying; then the ninth pneumatic diaphragm valve 35 is closed;

step 12, closing the water-sealed vacuum pump 36, opening the seventh pneumatic diaphragm valve 21 and the second pneumatic diaphragm valve 2, and allowing outside air to enter the stainless steel cylindrical cavity through the third air filter 20 to balance the air pressure in the stainless steel cylindrical cavity with the atmospheric pressure; compressed air of the compressed air source enters the inflation groove between the outer ring installation groove and the inner ring installation groove through the second pneumatic diaphragm valve 2, after the inflation groove is maintained for 2 minutes, the second pneumatic diaphragm valve 2 is closed, the ninth pneumatic diaphragm valve 35 is opened, and the balance between the pressure in the inflation groove and the atmospheric pressure is recovered. (in order to open the door more conveniently),

step 13, the second pneumatic diaphragm valve 2, the fourth pneumatic diaphragm valve 4, the sixth pneumatic diaphragm valve 9, and the ninth pneumatic diaphragm valve 35 are all closed. The first door panel 11 or the second door panel 25 is opened, and only one door panel is opened between the first door panel 11 and the second door panel 25.

If the sterilization process needs to be interrupted during the steps 3 to 9, the steps 10 to 12 are performed, and the second pneumatic diaphragm valve 2, the fourth pneumatic diaphragm valve 4, the sixth pneumatic diaphragm valve 9, and the ninth pneumatic diaphragm valve 35 are all closed. The door panel (the first door panel 11 or the second door panel 25) at the time of putting in the article to be sterilized in the implementation of step 3 is opened.

And (5) sterilizing and finishing the whole process. And the state of each valve of the sterilizer returns to the state of the first step, and the first pneumatic diaphragm valve 1, the second pneumatic diaphragm valve 2, the third pneumatic diaphragm valve 3, the fourth pneumatic diaphragm valve 4, the fifth pneumatic diaphragm valve 7, the sixth pneumatic diaphragm valve 9, the eighth pneumatic diaphragm valve 34 and the ninth pneumatic diaphragm valve 35 are all in a closed state. The seventh pneumatic diaphragm valve 21 is in an open state.

Filter sterilization procedure:

the first pneumatic diaphragm valve 1, the second pneumatic diaphragm valve 2, the third pneumatic diaphragm valve 3, the fourth pneumatic diaphragm valve 4, the fifth pneumatic diaphragm valve 7, the sixth pneumatic diaphragm valve 9, the eighth pneumatic diaphragm valve 34, and the ninth pneumatic diaphragm valve 35 are all in a closed state. The seventh pneumatic diaphragm valve 21 is in an open state.

Opening the fifth pneumatic diaphragm valve 7, raising the temperature measured by the exhaust temperature sensor 5 to 121 ℃, starting timing, wherein in the timing process, the fifth pneumatic diaphragm valve 7 and the fourth pneumatic diaphragm valve 4 are intermittently opened and closed, the opening-closing time ratio of the fifth pneumatic diaphragm valve 7 is greater than or equal to the opening-closing time ratio of the fourth pneumatic diaphragm valve 4, the opening-closing time ratio is the ratio of the opening time to the closing time in one opening-closing period, after timing for 30 minutes, the fifth pneumatic diaphragm valve 7 and the fourth pneumatic diaphragm valve 4 are closed, the sixth pneumatic diaphragm valve 9 is opened, naturally cooling is carried out, and the sixth pneumatic diaphragm valve 9 is closed until the temperature of the exhaust temperature sensor 5 is lower than 90 ℃. The in situ sterilization process of the first air filter 6 and the second air filter 8 is ended. The filter sterilization is completed during the maintenance process, and the first air filter 6 and the second air filter 8 can be replaced with new ones.

The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be within the protection scope of the claims and the modifications made without departing from the principles of the present invention and all of them should fall within the protection scope of the present invention.

Claims

1. The utility model provides a biological safety type autoclave, including stainless steel cylindrical cavity (28), a serial communication port, stainless steel cylindrical cavity (28) both ends are the open end, two open ends of stainless steel cylindrical cavity (28) are all sealed to press and are equipped with the door plant, outer loop mounting groove (41) and inner ring mounting groove (42) have been seted up on the ring face (46) of the open end of stainless steel cylindrical cavity (28), be provided with outer ring seal circle (43) in outer loop mounting groove (41), be provided with inner ring seal circle (44) in inner ring mounting groove (42), it has seted up between outer loop mounting groove (41) and inner ring mounting groove (42) to lie in ring face (46) of the open end of stainless steel cylindrical cavity (28), inflation groove (45) have been seted up, the door plant is sealed laminating with outer loop seal circle (43) and inner ring seal circle.

2. The biosafety type autoclave according to claim 1, wherein the inflation groove (45) is provided with an inflation port and a deflation port, the inflation port is connected with a compressed air source through a second pneumatic diaphragm valve (2), the inflation port is further connected with an air outlet of the steam generator (30) through a first pneumatic diaphragm valve (1), the deflation port is connected with a hot air inlet of the water-cooled heat exchanger (36) through a ninth pneumatic diaphragm valve (35), and a hot air outlet of the water-cooled heat exchanger (36) is connected with the water-sealed vacuum pump (37).

3. The biosafety type autoclave according to claim 2, wherein a cavity steam inlet (27) is arranged at the bottom of the stainless steel cylindrical cavity (28), a cavity exhaust port (22) is arranged at the top of the stainless steel cylindrical cavity (28), a jacket (26) is sleeved on the stainless steel cylindrical cavity (28), an air outlet of a steam generator (30) is connected with one end of a third pneumatic diaphragm valve (3), the other end of the third pneumatic diaphragm valve (3) is respectively connected with an air inlet of the jacket (26), a jacket temperature sensor (16) and a first safety valve (17) are arranged at an air inlet of the jacket (26), an air outlet of the jacket (26) is connected with the cavity steam inlet (27) through a one-way valve (33) and an eighth pneumatic diaphragm valve (34) in sequence, a second drain valve (32) is arranged at an air outlet of the jacket (26),

the cavity exhaust port (22) is connected with one end of a fourth pneumatic diaphragm valve (4), the other end of the fourth pneumatic diaphragm valve (4) is provided with an exhaust temperature sensor (5) and is connected with one end of a first air filter (6), the other end of the first air filter (6) is connected with one end of a second air filter (8), the other end of the second air filter (8) is connected with one end of a fifth pneumatic diaphragm valve (7) and one end of a sixth pneumatic diaphragm valve (9) respectively, the other end of the fifth pneumatic diaphragm valve (7) is connected with an air outlet of a steam generator (30), and the other end of the sixth pneumatic diaphragm valve (9) is connected with a hot air inlet of a water-cooled heat exchanger (36) through an activated carbon filter (10).

4. A biosafety autoclave according to claim 3, characterized in that the steam generator (30) is provided with a second safety valve (29) at the outlet and a first trap (31) at the outlet of the steam generator (30).

5. A biosafety autoclave according to claim 4, characterized by further comprising an intra-cavity pressure sensor (14) for measuring the pressure inside the stainless steel cylindrical cavity (28), and intra-cavity temperature sensors (15, 19) for measuring the temperature inside the stainless steel cylindrical cavity (28), and a needle temperature sensor (18) for measuring the temperature of the goods to be sterilized inside the stainless steel cylindrical cavity (28).

6. The biosafety type autoclave according to claim 5, wherein the stainless steel cylindrical cavity (28) is further provided with an external air inlet hole, the external air inlet hole is connected with one end of a third air filter (20), and the other end of the third air filter (20) is provided with a seventh pneumatic diaphragm valve (21).