Steam sterilization device

Abstract

The utility model provides a steam sterilization device, which comprises a steam sterilization main body and an air supply pipeline, and further comprises an outlet pipeline, an air supply pipeline and an air supply pipeline, the automatic on-off valve, the heat exchanger and the vacuum pump are sequentially arranged on the outlet pipeline; the automatic opening and closing valve is provided with a condensate water drainage hole; the vacuum pump is used for sucking or discharging gas or a gas-liquid mixture from the outlet of the main body and is provided with a suction inlet and a discharge outlet; the heat exchanger is used for condensing gas or a gas-liquid mixture from the outlet of the main body and is provided with a first heat exchange flow path and a second heat exchange flow path which are correspondingly arranged, and the two ends of the first heat exchange flow path communicate with the automatic opening and closing valve and the suction inlet correspondingly; and the first medium supply mechanism is used for providing heat exchange fluid, and an outlet of the first medium supply mechanism communicates with the second heat exchange flow path. According to the utility model, the vacuumizing time and the drying time are shortened, and the pipeline structure is simplified.

Description

Technical Field

[0001] The utility model relates to the field of sterilization devices, in particular to a steam sterilization device. Background Art

[0002] Steam sterilization is to place the sterilized object in a sealed container. The high-temperature steam in the container releases heat, causing the bacterial protein to coagulate and denature, thereby achieving the purpose of sterilization. In addition, before and after steam sterilization, there are also exhaust processes, steam exhaust processes and drying processes. Exhaust refers to the removal of air from the container before sterilization. The steam exhaust process refers to the exhaust of steam from the container after the sterilization is completed. After the steam is exhausted, the sterilized object is dried by repeatedly supplying or exhausting air into the container (pressurization or decompression).

[0003] like Figure 1 As shown, the existing steam sterilization device generally includes: a container (steam sterilization body 10) and multiple pipelines connected to the outlet of the steam sterilization body 10: a vacuum pipeline L1 for exhausting the steam sterilization body (air), an exhaust pipeline L2 for discharging steam, and a drainage pipeline L3 for discharging condensed water in the steam sterilization body 10. In addition, it also includes a steam supply pipeline L4 and an air supply pipeline L5 connected to the inlet of the steam sterilization body 10. The setting of multiple pipelines at the outlet of the steam sterilization body 1 increases the cost of the steam sterilization device, and at the same time, the discharge time of the fluid in each pipeline is long, which reduces the efficiency of steam sterilization.

[0004] In addition, a steam trap 30 is provided on the drainage pipeline L3, which can discharge condensed water generated during sterilization and prevent the discharge of sterilizing steam. However, due to the nature of its components, the existing steam trap 30 is only used to discharge condensed water, which has great limitations. Utility Model Content

[0005] In view of the above problems, the utility model provides a steam sterilization device, which arranges an automatic opening and closing valve, a vacuum pump, and a heat exchanger together in the outlet pipeline. When sterilizing, the automatic opening and closing valve can be used to discharge condensed water; when vacuuming and drying, the automatic opening and closing valve is fully opened to ensure the circulation of the fluid, and the fluid in the heat exchanger is exchanged with the fluid provided by the first medium supply mechanism and then sucked into the vacuum pump, which can shorten the vacuuming time and drying time and improve the sterilization efficiency; in addition, the drainage pipeline is eliminated, the pipeline structure is simplified, and the cost is saved.

[0006] The utility model provides a steam sterilization device, comprising:

[0007] A steam sterilization body, used for containing sterilized objects and steam for sterilizing the sterilized objects, the steam sterilization body having a body outlet and a body inlet;

[0008] An air supply pipeline, the outlet of which is connected to the steam sterilization body, and the steam sterilization device also includes:

[0009] An outlet pipeline is connected with the main body outlet;

[0010] An automatic opening and closing valve, a heat exchanger and a vacuum pump are sequentially arranged on the outlet pipeline;

[0011] The automatic opening and closing valve is equipped with a condensate drainage hole;

[0012] The vacuum pump is used to suck gas or gas-liquid mixture from the main body outlet and discharge it, and the vacuum pump has a suction port and a discharge port;

[0013] The heat exchanger is used to condense the gas or gas-liquid mixture from the main body outlet, and the heat exchanger has a first heat exchange flow path and a second heat exchange flow path that are correspondingly arranged, and both ends of the first heat exchange flow path are respectively connected to the automatic opening and closing valve and the suction port;

[0014] The first medium supply mechanism is used to provide heat exchange fluid, and the outlet of the first medium supply mechanism is connected to the second heat exchange flow path.

[0015] According to the technical solution, when evacuating, the main body inlet is closed, the automatic opening and closing valve is opened, the vacuum pump is running, and the fluid (including air and steam) from the main body outlet enters the first heat exchange flow path and is condensed after heat exchange with the heat exchange fluid in the second heat exchange flow path. The water vapor in the fluid is condensed and converted into liquid water. The total volume of the fluid is reduced, which is conducive to the vacuum pump to evacuate and shorten the vacuum time. Similarly, in the drying process, the fluid after heat exchange is sucked into the vacuum pump, and the total volume of the fluid is reduced, which is conducive to vacuum decompression and promotes the evaporation of water that is not fully discharged in the steam discharge process and adheres to the sterilized object, thereby shortening the water evaporation time; in addition, the automatic opening and closing valve can be in a fully open state, which is conducive to the discharge of the fluid in the steam sterilization main body, thereby helping to improve the vacuum efficiency and drying efficiency.

[0016] In addition, when the steam is supplied to the steam sterilization body for sterilization and the air in the steam sterilization body is pressurized to dry the sterilized objects, the automatic opening and closing valve is closed and the vacuum pump stops running. The condensed water generated in the steam sterilization body can flow out through the body outlet and then enter the automatic opening and closing valve to be discharged through the condensed water drain hole, taking into account the sterilization effect during sterilization and the drying effect during pressurized drying, which is beneficial to shortening the drying time; and the automatic opening and closing valve is arranged on the outlet pipeline, and there is no need to set up an additional drainage pipeline, which simplifies the pipeline structure of the steam sterilization device and is beneficial to cost saving.

[0017] The optional technical solution of the utility model further includes: a temperature sensor, which is arranged on the pipeline between the outlet of the main body and the inlet of the automatic opening and closing valve;

[0018] The flow control module is connected to the temperature sensor for communication. The flow control module controls the flow of the heat exchange fluid entering the second heat exchange flow path according to the temperature detection result of the temperature sensor.

[0019] According to this technical solution, the steam temperature at the outlet of the main body is detected by a temperature sensor, and the flow rate of the heat exchange fluid in the second heat exchange path is adjusted according to the steam temperature at the outlet of the main body, so that the heat of the heat exchange fluid can be matched with the heat required for condensation of steam in the first heat exchange path. On the basis of ensuring the condensation effect of the steam in the first heat exchange path, the amount of heat exchange fluid can be saved.

[0020] In an optional technical solution of the utility model, a first flow meter and a first switch valve are sequentially provided in the medium flow direction of the first medium supply mechanism.

[0021] According to the technical solution, by setting a first flow meter and a first switch valve, the flow rate of the heat exchange fluid can be adjusted according to the actual working conditions, so that the heat of the heat exchange fluid provided by the first medium supply mechanism matches the heat required for the condensation of steam in the first heat exchange flow path, thereby saving the amount of heat exchange fluid while ensuring the condensation effect of the steam in the first heat exchange flow path.

[0022] In the optional technical solution of the utility model, the vacuum pump is a water ring vacuum pump, and the vacuum pump also includes a sealing liquid inlet; the steam sterilization device also includes a second medium supply mechanism, the outlet of which is connected to the sealing liquid inlet, and the second medium supply mechanism is used to supply sealing liquid to the vacuum pump.

[0023] According to this technical solution, by providing a second medium supply mechanism to supply sealing liquid into the vacuum pump, the sealing liquid taken away by the vacuum pump outlet can be replenished, thereby ensuring the cooling effect of the sealing liquid on the vacuum pump and the normal operation of the vacuum pump.

[0024] In an optional technical solution of the utility model, a second flow meter and a second switch valve are sequentially provided in the medium flow direction of the second medium supply mechanism.

[0025] According to the technical solution, by setting a second switch valve and a second flow meter, the flow of the sealing liquid entering the vacuum pump can be controlled as needed, thereby ensuring the cooling effect on the vacuum pump, allowing the vacuum pump to operate normally within a suitable temperature, thereby extending the service life of the vacuum pump.

[0026] In an optional technical solution of the utility model, a first check valve is provided at the discharge outlet.

[0027] According to the technical solution, the provision of the first check valve can prevent the gas-liquid mixture at the outlet of the vacuum pump from flowing back into the vacuum pump, which is beneficial to improving the steam exhaust efficiency of the steam sterilization body.

[0028] The optional technical solutions of the utility model also include:

[0029] The inlet of the drainage pipeline is connected between the outlet of the first heat exchange flow path and the suction port, and the drainage pipeline is provided with a third switch valve and a second check valve.

[0030] According to the technical solution, when the steam in the heat exchanger is condensed into liquid, it can be discharged through the drainage pipeline, which is helpful to prevent water from entering the vacuum pump, causing the vacuum pump resistance to increase and generate noise. The setting of the third switch valve improves the flexibility of exhaust, and the setting of the second check valve can prevent steam backflow and improve the steam exhaust efficiency.

[0031] In an optional technical solution of the utility model, a fourth switch valve and a third check valve are sequentially provided on the pipeline between the inlet and the suction port of the drainage pipeline.

[0032] According to the technical solution, the fourth switch valve is arranged at the inlet and the suction port of the drainage pipeline, that is, whether the fourth switch valve is opened or not, the condensed water at the outlet of the first heat exchange flow path can be discharged through the drainage pipeline; the fourth switch valve can close or open the suction port of the vacuum pump as needed, which improves the convenience of use. The third check valve can prevent the fluid at the outlet of the first heat exchange flow path from flowing back, which is conducive to improving the vacuuming efficiency.

[0033] The optional technical solution of the utility model further includes: a steam supply pipeline, the outlet of which is connected to the inlet of the main body.

[0034] According to this technical solution, steam is supplied to the steam sterilization body through an external steam supply pipeline to sterilize the sterilized objects, which simplifies the structure of the steam sterilization device and improves the convenience of steam supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a steam sterilization device in the prior art.

[0036] Figure 2 It is a structural schematic diagram of the steam sterilization device in the embodiment of the utility model.

[0037] Figure 3 It is a schematic diagram of the internal structure of the automatic opening and closing valve in the embodiment of the utility model.

[0038] Figure 4 This is another structural schematic diagram of the steam sterilization device in the embodiment of the utility model.

[0039] Reference numerals:

[0040] Existing technology:

[0041] Steam sterilization body 10; steam trap 30;

[0042] This application:

[0043] Steam sterilization body 1; body outlet 11; body inlet 12; outlet pipeline 2; automatic opening and closing valve 21; condensate drain hole 211; valve seat 212; valve core 213; heat exchanger 22; first heat exchange flow path 221; second heat exchange flow path 222; vacuum pump 23; suction port 231; discharge port 232; sealing liquid inlet 233; fourth switch valve 24; third check valve 25; first check valve 26; first medium supply mechanism 3; first flow meter 31; first switch valve 32; air supply pipeline 4; air filter 41; fifth switch valve 42; fourth check valve 43; steam supply pipeline 5; temperature sensor 6; second medium supply mechanism 7; second flow meter 71; second switch valve 72; drain pipeline 8; third switch valve 81; second check valve 82. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] like Figure 2 As shown, the utility model provides a steam sterilization device, including a steam sterilization body 1, an outlet pipeline 2, an automatic opening and closing valve 21, a heat exchanger 22, a vacuum pump 23, a first medium supply mechanism 3, an air supply pipeline 4 and a steam supply pipeline 5.

[0046] Specifically, the steam sterilization body 1 is used to contain sterilized objects and steam for sterilizing the sterilized objects, and the steam sterilization body 1 has a body outlet 11 and a body inlet 12 .

[0047] The outlet pipe 2 is connected to the main body outlet 11, and the outlet pipe 2 is provided with an automatic opening and closing valve 21, a heat exchanger 22 and a vacuum pump 23 in sequence. Figure 3 As shown, the automatic opening and closing valve 21 is provided with a condensate drain hole 211; the vacuum pump 23 is used to inhale and discharge the gas or gas-liquid mixture from the main body outlet 11, and the vacuum pump 23 has a suction port 231 and a discharge port 232; the heat exchanger 22 is used to condense the steam at the main body outlet 11, and the heat exchanger 22 has a correspondingly arranged first heat exchange flow path 221 and a second heat exchange flow path 222, and the two ends of the first heat exchange flow path 221 are respectively connected to the automatic opening and closing valve 21 and the suction port 231.

[0048] The first medium supply mechanism 3 is used to provide heat exchange fluid, and an outlet of the first medium supply mechanism 3 is connected to the second heat exchange flow path 222 .

[0049] The outlet of the air supply pipeline 4 is connected to the steam sterilization body 1. The air supply pipeline 4 is provided with an air filter 41, a fifth switch valve 42 and a fourth check valve 43. The amount of air entering the steam sterilization body 1 can be adjusted by the fifth switch valve 42 to achieve a change in the pressure inside the steam sterilization body 1, which is convenient for the drying process; the air is filtered by the air filter 41 to ensure the cleanliness of the air entering the steam sterilization body 1.

[0050] The outlet of the steam supply pipeline 5 is connected to the main body inlet 12, so as to supply steam to the steam sterilization main body 1 to sterilize the sterilized objects. The steam supply pipeline 5 is also provided with a valve element to adjust the flow of steam entering the sterilization main body 1.

[0051] In this embodiment, before the sterilization process, the steam sterilization body 1 can be evacuated to exhaust the air in the steam sterilization body 1, or steam can be introduced into the steam sterilization body 1 (at this time, the body inlet 12 can be in an open state) to exhaust the air therein, and then evacuated to exhaust the air therein. When the steam sterilization body 1 is evacuated (exhausted), the body inlet 12 is closed, the fifth switch valve 42 is closed, the automatic opening and closing valve 21 is opened, the vacuum pump 23 is operated, and the fluid (including air and steam) from the body outlet 11 enters the first heat exchange flow path 221, and is condensed after heat exchange with the heat exchange fluid in the second heat exchange flow path 222. The water vapor in the fluid is condensed and converted into liquid water, and the total volume of the fluid is reduced, which is conducive to the vacuum pump 23 to evacuate, thereby shortening the vacuum time.

[0052] Similarly, in the drying process after sterilization (same as the existing drying process, the pressure in the steam sterilization body 1 is changed by controlling the operation of the vacuum pump 23, thereby drying), the fluid after heat exchange is sucked into the vacuum pump 23, and the total volume of the fluid is reduced, which is conducive to vacuuming and decompression, and promotes the evaporation of water that is not fully discharged in the steam discharge process (between the sterilization process and the drying process) and adheres to the sterilized object, thereby shortening the water evaporation time. In addition, the automatic opening and closing valve 21 can be in a fully open state, which is conducive to the discharge of the fluid in the steam sterilization body 1, thereby helping to improve the vacuuming efficiency and drying efficiency.

[0053] In addition, in the present embodiment, when steam is supplied to the steam sterilization body 1 for sterilization and the air in the steam sterilization body 1 is pressurized to dry the sterilized object, the automatic opening and closing valve 21 is closed and the vacuum pump 23 stops running. The condensed water generated in the steam sterilization body 1 can flow out through the body outlet 11 and then enter the automatic opening and closing valve 21 and be discharged through the condensed water drainage hole 211, taking into account the sterilization effect during sterilization and the drying effect during pressurized drying, which is beneficial to shortening the drying time; and the automatic opening and closing valve 21 is arranged on the outlet pipe 2, and there is no need to set up an additional drainage pipe, which simplifies the pipe structure of the steam sterilization device and is beneficial to cost saving.

[0054] It should be noted that, in this embodiment, the opening and closing of the switch valve of the pipeline connected to the main body outlet 11 is mainly described, and the opening and closing of other valves not mentioned can refer to the existing steam sterilization method, which will not be repeated here.

[0055] In this embodiment, the automatic on-off valve 21 is a valve that can be controlled to open or close electrically or pneumatically, rather than a steam trap that controls whether to open the valve to discharge condensed water according to the water level of the condensed water. Figure 3 As shown, a piston-type switch valve is exemplified, and the valve seat 212 of the automatic opening and closing valve 21 is provided with a condensate drain hole 211, so that when the valve core 213 and the valve seat 212 of the automatic opening and closing valve 21 cooperate to form a sealing structure, condensate can also be discharged from the condensate drain hole 211 of the valve seat 212. Other structures of the automatic opening and closing valve 21 not shown can refer to the existing switch valve structure, such as ball valve, butterfly valve, stop valve, etc., which will not be repeated here. The aperture of the condensate drain hole 211 should be set within a reasonable range, while ensuring the discharge of condensate, it does not affect the pressurization speed during the drying process.

[0056] In a preferred embodiment of the utility model, the steam sterilization device further includes: a temperature sensor 6 and a flow control module (not shown in the figure), the temperature sensor 6 is arranged on the pipeline between the main body outlet 11 and the inlet of the automatic opening and closing valve 21; the flow control module is in communication connection with the temperature sensor 6, and the flow control module controls the flow of the heat exchange fluid entering the second heat exchange flow path 222 according to the temperature detection result of the temperature sensor 6. The temperature sensor 6 detects the steam temperature of the main body outlet 11, and adjusts the flow of the heat exchange fluid in the second heat exchange flow path 222 according to the steam temperature of the main body outlet 11, so that the heat of the heat exchange fluid can be matched with the heat required for the condensation of the steam in the first heat exchange flow path 221, and the amount of the heat exchange fluid can be saved on the basis of ensuring the condensation effect of the steam in the first heat exchange flow path 221.

[0057] The flow control module can be an integrated circuit chip with signal processing capability. The above-mentioned flow control module can be a general processor, including a central processing unit (CPU), or a single chip microcomputer, a microcontroller unit (MCU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), an embedded ARM and other chips. The flow control module can also be configured to receive signals from each flow meter and adjust the opening of the corresponding switch valve according to the real-time flow. In this embodiment, the first to fifth switch valves (81, 32, 72, 24, 52) can not only realize the on-off of the pipeline by switching, but also change the opening to adjust the flow of the fluid passing through the valve, that is, the first to fifth switch valves (81, 32, 72, 24, 52) can be opening regulating valves. In addition, the flow control module can also be configured to control the opening or closing of the automatic opening and closing valve 21.

[0058] In a preferred embodiment of the present invention, the medium flow direction of the first medium supply mechanism 3 ( Figure 2 A first flow meter 31 and a first switch valve 32 are sequentially arranged on the first medium supply mechanism 3 in the middle (in the direction indicated by the arrow at the first medium supply mechanism 3). By arranging the first flow meter 31 and the first switch valve 32, the flow rate of the heat exchange fluid can be adjusted according to the actual working conditions, so that the heat of the heat exchange fluid provided by the first medium supply mechanism 3 matches the heat required for the condensation of the steam in the first heat exchange flow path 221, and the amount of the heat exchange fluid is saved on the basis of ensuring the condensation effect of the steam in the first heat exchange flow path 221.

[0059] In a preferred embodiment of the utility model, the vacuum pump 23 is a water ring vacuum pump, and the vacuum pump 23 also includes a sealing liquid inlet 233; the steam sterilization device also includes a second medium supply mechanism 7, the outlet of which is connected to the sealing liquid inlet 233 of the vacuum pump 23, and the second medium supply mechanism 7 is used to supply sealing liquid (the sealing liquid in this embodiment is water) into the vacuum pump 23. By setting the second medium supply mechanism 7 to supply sealing liquid into the vacuum pump 23, the sealing liquid taken away by the discharge port 232 of the vacuum pump 23 can be supplemented, so as to ensure the cooling effect of the sealing liquid on the vacuum pump 23 and the normal operation of the vacuum pump 23. The water ring vacuum pump is a common structure in the art, including a housing, a motor and an impeller (not shown in the figure), the impeller is eccentrically installed in the housing in which the sealing liquid is stored, when the motor drives the impeller to rotate, the water stored in the housing rotates through the impeller to form a water ring, and the water ring forms a sealed space between the blades adjacent to the impeller, and the volume of the space changes with the rotation of the impeller because the impeller is eccentrically installed on the housing, so that the continuous suction, compression and exhaust are realized. Since a part of the water stored in the housing is discharged together with the exhaust gas, it is necessary to replenish the sealing liquid from the sealing liquid inlet 233 .

[0060] It should be noted that in Figure 2 In the structure diagram of the steam sterilization device shown, when the steam needs to be discharged after sterilization, the vacuum pump 23 is generally not used to extract steam above 100°C, which will generate noise. Therefore, the heat exchange fluid supplied by the first medium supply mechanism 3 can be used to exchange heat with the steam in the first heat exchange flow path 22, so that the steam is partially condensed into liquid, thereby reducing the overall temperature of the steam. The cooled steam and a small amount of condensed water are sucked in and discharged by the vacuum pump 23. A small amount of condensed water entering the vacuum pump 23 will not affect the performance of the vacuum pump 23.

[0061] Furthermore, the medium flow direction of the second medium supply mechanism 7 ( Figure 2 A second flow meter 71 and a second switch valve 72 are provided in sequence on the first medium supply mechanism 3 and the second medium supply mechanism 7 (in the direction indicated by the arrow at the second medium supply mechanism 7). By providing the second switch valve 72 and the second flow meter 71, the flow rate of the sealing liquid entering the vacuum pump 23 can be controlled as needed, thereby ensuring the cooling effect on the vacuum pump 23, so that the vacuum pump 23 can operate normally within a suitable temperature, and the service life of the vacuum pump 23 is extended. In this embodiment, the medium supplied by the first medium supply mechanism 3 and the second medium supply mechanism 7 is water.

[0062] In this embodiment, the discharge port 232 of the vacuum pump 23 is provided with a first check valve 26. The first check valve 26 can prevent the gas-liquid mixture at the outlet of the vacuum pump 23 from flowing back into the vacuum pump 23, which is beneficial to improving the steam discharge efficiency of the steam sterilization body 1.

[0063] like Figure 4As shown, in some embodiments, a fourth switch valve 24 and a third check valve 25 are sequentially provided on the pipeline between the outlet of the first heat exchange flow path 221 and the suction port 231 of the vacuum pump 23. The fourth switch valve 24 can close or open the suction port 231 of the vacuum pump 23 as needed, which improves the convenience of use. The third check valve 25 can prevent the fluid at the outlet of the first heat exchange flow path 221 from flowing back, which is conducive to improving the vacuuming efficiency.

[0064] Continue to refer Figure 4 In some embodiments, the steam sterilization device further includes: a drainage pipeline 8, the inlet of which is connected between the outlet of the first heat exchange flow path 221 and the inlet of the fourth switch valve 24. When the steam in the steam sterilization body 1 needs to be discharged after the sterilization is completed, regardless of whether the fourth switch valve 24 is opened, the condensed water at the outlet of the first heat exchange flow path 221 can be discharged through the drainage pipeline 8 without using the vacuum pump 23 for drainage, thereby reducing the generation of noise. The drainage pipeline 8 is provided with a third switch valve 81 and a second check valve 82. The setting of the third switch valve 81 improves the flexibility of drainage, and the setting of the second check valve 82 can prevent water from flowing back and improve drainage efficiency.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam sterilization device, comprising: A steam sterilization body, used for containing sterilized objects and steam for sterilizing the sterilized objects, the steam sterilization body having a body outlet and a body inlet; The air supply pipeline has an outlet connected to the steam sterilization body, characterized in that the steam sterilization device also includes: An outlet pipeline is connected to the main body outlet; An automatic opening and closing valve, a heat exchanger and a vacuum pump are sequentially arranged on the outlet pipeline; The automatic opening and closing valve is provided with a condensate drainage hole; The vacuum pump is used to suck in gas or gas-liquid mixture from the outlet of the main body and discharge it, and the vacuum pump has a suction port and a discharge port; The heat exchanger is used to condense the gas or gas-liquid mixture from the main body outlet, and the heat exchanger has a first heat exchange flow path and a second heat exchange flow path which are arranged correspondingly, and the two ends of the first heat exchange flow path are respectively connected to the automatic opening and closing valve and the suction port; The first medium supply mechanism is used to provide heat exchange fluid, and the outlet of the first medium supply mechanism is connected to the second heat exchange flow path.

2. The steam sterilization device according to claim 1, characterized in that: Also includes: A temperature sensor is provided on the pipeline between the main body outlet and the inlet of the automatic opening and closing valve; A flow control module is connected to the temperature sensor for controlling the flow of the heat exchange fluid entering the second heat exchange flow path according to a temperature detection result of the temperature sensor.

3. The steam sterilization device according to claim 2, characterized in that: A first flow meter and a first switch valve are sequentially arranged in the medium flow direction of the first medium supply mechanism.

4. The steam sterilization device according to claim 2, characterized in that: The vacuum pump is a water ring vacuum pump, and the vacuum pump further comprises a sealing liquid inlet; The steam sterilization device further comprises a second medium supply mechanism, an outlet of which is connected to the sealing liquid inlet, and the second medium supply mechanism is used for supplying sealing liquid into the vacuum pump.

5. The steam sterilization device according to claim 4, characterized in that: A second flow meter and a second switch valve are sequentially arranged in the medium flow direction of the second medium supply mechanism.

6. The steam sterilization device according to claim 1, characterized in that: The discharge port is provided with a first check valve.

7. The steam sterilization device according to any one of claims 1 to 6, characterized in that: Also includes: The inlet of the drainage pipeline is connected between the outlet of the first heat exchange flow path and the suction port, and the drainage pipeline is provided with a third switch valve and a second check valve.

8. The steam sterilization device according to claim 7, characterized in that: A fourth switch valve and a third check valve are sequentially arranged on the pipeline between the inlet of the drainage pipeline and the suction port.

9. The steam sterilization device according to claim 7, characterized in that: Also includes: The steam supply pipeline has an outlet connected to the main body inlet.

Images