Baking mold sterilization equipment and sterilization method for food making

Abstract

The invention relates to the field of food sterilization, and discloses baking mold sterilization equipment for food making, which comprises a steam sterilization cabinet, an inner cavity of the steam sterilization cabinet is divided into an upper sterilization chamber and a lower installation chamber, a steam circulation mechanism and a steam generation mechanism are arranged in the lower installation chamber, and a gas hood is arranged at an upper opening of the upper sterilization chamber. The steam circulating mechanism comprises a gas storage tank and a circulating assembly, the circulating assembly comprises a circulating pump, a first connecting pipe is arranged at the input end of the circulating pump, the tail end of the first connecting pipe is connected with the gas hood, a second connecting pipe is arranged on the outer surface of the first connecting pipe, the tail end of the second connecting pipe is communicated with the outside, and a first valve is arranged on the second connecting pipe; a third connecting pipe is arranged at the output end of the circulating pump, a fourth connecting pipe is arranged at the output end of the steam generating mechanism, the third connecting pipe, the fourth connecting pipe and an inlet of the gas storage tank are connected through a second valve, and a third valve is arranged at an outlet of the gas storage tank.

Description

Technical Field

[0001] The present invention relates to the field of food sterilization, and particularly to a baking mold sterilization device and a sterilization method for food production. Background Art

[0002] When making pastries such as cakes, baking molds are used. Before use, the baking molds generally need to be disinfected and sterilized to ensure the safe consumption of food.

[0003] In the prior art, the disinfection and sterilization of food and food processing tools generally adopt high-temperature steam sterilization technology, that is, the food or food processing tools are placed in a high-temperature steam sterilization cabinet, and then the sterilization purpose is achieved by using high-temperature steam. After a preset time, the sterilization ends, the cabinet door is opened, and the food or food processing tools are taken out. For example, the Chinese invention patent application with the application publication number CN110663858A discloses a steam cabinet for food sterilization, which opens the installation space by rotating the cover, so as to place the food to be sterilized in the steam cabinet or take away the sterilized food. However, this method has some deficiencies: every time after the sterilization ends, when the staff opens the steam cabinet and takes away the sterilized object, since there is still steam in the steam cabinet and the pressure is slightly greater than the atmospheric pressure, steam leakage will occur. The leaked steam not only has the problem of easily scalding the staff, but also has the problem of heat waste.

[0004] Based on the above problems, the present invention proposes a baking mold sterilization device and a sterilization method for food production. Summary of the Invention

[0005] To solve the problems mentioned in the above background, the present invention provides a baking mold sterilization device and a sterilization method for food production.

[0006] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0007] A baking mold sterilization device for food production includes a steam sterilization cabinet. The inner cavity of the steam sterilization cabinet is divided into an upper sterilization chamber and a lower installation chamber. A steam circulation mechanism and a steam generation mechanism are arranged in the lower installation chamber. An air hood is arranged at the upper opening of the upper sterilization chamber. The lower end of the air hood is open and the upper end is closed. The steam circulation mechanism includes a gas storage tank and a circulation component. The circulation component includes a circulation pump; The input end of the circulation pump is provided with a first connecting pipe. The end of the first connecting pipe is connected to the air hood. The outer surface of the first connecting pipe is provided with a second connecting pipe. The end of the second connecting pipe is communicated with the outside and a valve one is arranged on the second connecting pipe; The output end of the circulation pump is provided with a third connecting pipe, and the output end of the steam generating mechanism is provided with a fourth connecting pipe. The third connecting pipe, the fourth connecting pipe and the inlet of the gas storage tank are connected through a second valve. The second valve is used to connect the third connecting pipe with the inlet of the gas storage tank or connect the fourth connecting pipe with the inlet of the gas storage tank. A third valve is arranged at the outlet of the gas storage tank.

[0008] As a further improvement and optimization of the present invention, a plurality of placing partitions are arranged in the upper sterilization chamber in a vertical array. An inlet and outlet is opened on the side surface of the upper sterilization chamber, and a cabinet door is arranged at the inlet and outlet in a matching manner.

[0009] As a further improvement and optimization of the present invention, a heating element and a temperature sensor are arranged in the gas storage tank.

[0010] As a further improvement and optimization of the present invention, an ultraviolet lamp is arranged above each placing partition.

[0011] As a further improvement and optimization of the present invention, an air sterilization element is arranged at the end of the second connecting pipe.

[0012] As a further improvement and optimization of the present invention, the outlet of the gas storage tank and the upper sterilization chamber are communicated through an auxiliary component.

[0013] As a further improvement and optimization of the present invention, the auxiliary component includes a rotating shaft in the shape of a hollow shaft and arranged vertically; The lower end of the rotating shaft is located in the lower installation chamber and is connected with the outlet of the gas storage tank through a fifth connecting pipe. The fifth connecting pipe and the rotating shaft are connected through a rotary joint; The upper end of the rotating shaft extends into the upper sterilization chamber and is provided with a fan blade. The inside of the fan blade is hollow and is communicated with the rotating shaft. The outer surface of the fan blade is provided with an air outlet.

[0014] As a further improvement and optimization of the present invention, the rotating shaft and a motor arranged in the lower installation chamber are in power connection through a power transmission component.

[0015] A sterilization method for a baking mold sterilization device for food production: Step 1: Place the object to be sterilized into the upper sterilization chamber; Step 2: Close the first valve, open the third valve, and the second valve connects the fourth connecting pipe with the inlet of the gas storage tank; The steam provided by the steam generating mechanism enters the gas storage tank through the fourth connecting pipe, and then enters the upper sterilization chamber from the outlet of the gas storage tank; After the steam in the storage tank and the upper sterilization chamber reaches the preset amount, Valve 2 switches its state. Valve 2 connects the third connecting pipe and the inlet of the storage tank. At the same time, the circulation pump starts, causing the steam in the upper sterilization chamber to sequentially enter the storage tank through the first connecting pipe and the third connecting pipe, and then return to the upper sterilization chamber from the outlet of the storage tank, realizing the circulating flow of steam, sterilizing the objects in the upper sterilization chamber. At the same time, the heating element starts to ensure that the temperature of the steam meets the sterilization requirements; Step 3: After the preset time, the sterilization is completed and Valve 3 closes; The circulation pump continues to draw the steam to flow. At this time, the steam is stored in the storage tank, and the upper sterilization chamber is in a negative pressure state; Step 4: The circulation pump stops running and Valve 1 opens. Under the action of negative pressure, the outside cold air enters the upper sterilization chamber through the second connecting pipe and the first connecting pipe, causing the temperature in the upper sterilization chamber to gradually decrease and gradually return to normal pressure; Step 5: Take out the objects that have been sterilized in the upper sterilization chamber and put in the next batch of objects to be sterilized; Step 6: Valve 1 closes and Valve 3 opens; The circulation pump starts and continues to draw the steam in the storage tank to circulate, realizing sterilization.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In this solution, the steam after the previous sterilization is recovered and used in the next sterilization. Therefore, it can play a role in recycling heat and achieve an energy-saving effect. On this basis, an example is given (it should be noted that the data mentioned below is for illustrative purposes for easy understanding, and the specific sterilization time and other data vary depending on the type of objects to be sterilized): The sterilization lasts for 10 minutes in total, that is, the sterilization ends after 10 minutes. Then, during the period from 10 minutes to 10.5 minutes, it is the process of steam recovery and storage. Then, during the period from 10.5 minutes to 11 minutes, it is the process of outside cold air entering. After 11 minutes, the staff starts to open the cabinet door; During the above-mentioned period from 10 minutes to 11 minutes, since the steam is recovered into the storage tank and the upper sterilization chamber is in a negative pressure state, it can play an effect of restricting the opening of the cabinet door, that is, preventing the staff from opening the cabinet door immediately after the sterilization is completed and being easily scalded. Further, even if the staff forcibly opens the cabinet door, under the action of negative pressure, it is the outside air that rushes into the upper sterilization chamber through the gap of the opened cabinet door, restricting the leakage of the steam in the upper sterilization chamber and further improving safety. Further, after 11 minutes, the temperature in the upper sterilization chamber has decreased and returned to normal pressure. At this time, the cabinet door can be opened to take out the objects without the risk of scalding; In addition, the entry of external cold air can not only restrict the opening of the cabinet door and limit the leakage of steam, but also reduce the surface temperature of the sterilized objects as much as possible, thereby preventing the staff from being scalded by the objects when taking out the sterilized objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Structural schematic of the present invention Figure 1 ; Figure 2 Structural schematic of the present invention Figure 2 ; Figure 3 Internal structural schematic of the steam sterilization cabinet Figure 1 ; Figure 4 Internal structural schematic of the steam sterilization cabinet Figure 2 ; Figure 5 Schematic of the steam circulation mechanism Figure 1 ; Figure 6 Schematic of the steam circulation mechanism Figure 2 ; Figure 7 Schematic diagram of the circulation component; Figure 8 Schematic diagram of the auxiliary component.

[0018] The reference numerals in the drawings are: 100, steam sterilization cabinet; 101, cabinet door; 102, placement partition; 103, air hood; 104, ultraviolet lamp; 200, steam circulation mechanism; 201, gas storage tank; 202, circulation component; 2021, circulation pump; 2022, first connecting pipe; 2023, second connecting pipe; 2024, valve 1; 2025, third connecting pipe; 2026, fourth connecting pipe; 2027, valve 2; 203, auxiliary component; 2031, motor; 2032, power transmission member; 2033, rotating shaft; 2034, fifth connecting pipe; 2035, fan blade; 2036, air outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manners, structures, features and their effects of the present invention as follows.

[0020] Embodiment 1 Referring to Figures 1 - 8 , a baking mold sterilization device for food production includes a steam sterilization cabinet 100.

[0021] The inner cavity of the steam sterilizer 100 is divided into an upper sterilization chamber and a lower installation chamber. A plurality of placement partitions 102 are arranged in the upper sterilization chamber in a vertical array for placing objects to be sterilized, such as baking molds for food processing. An inlet and outlet are provided on the side of the upper sterilization chamber, and a cabinet door 101 is arranged at the inlet and outlet. The technologies for opening or closing the cabinet door 101 and locking the cabinet door 101 after closing are all achievable by existing technologies and will not be elaborated.

[0022] A steam circulation mechanism 200 and a steam generation mechanism are arranged in the lower installation chamber. The steam generation mechanism is used to provide steam, which is achievable by existing technologies and will not be elaborated, and is not shown in the drawings. The steam circulation mechanism 200 is one of the cores of this solution and will be elaborated in detail later.

[0023] Steam circulation mechanism 200: Refer to Figure 3 And Figure 4 , an air hood 103 is arranged at the upper opening of the upper sterilization chamber. The lower end of the air hood 103 is open and the upper end is closed.

[0024] The steam circulation mechanism 200 includes an air storage tank 201 and a circulation component 202.

[0025] Refer to Figure 7 , the circulation component 202 includes a circulation pump 2021. The circulation pump 2021 can adopt existing air pump technologies and is used to draw steam and air to flow.

[0026] The input end of the circulation pump 2021 is provided with a first connecting pipe 2022, and the end of the first connecting pipe 2022 is connected to the air hood 103.

[0027] The outer surface of the first connecting pipe 2022 is provided with a second connecting pipe 2023, and the end of the second connecting pipe 2023 is connected to a side hole arranged on the side of the lower installation chamber. That is to say, the second connecting pipe 2023 is communicated with the outside. In addition, a valve one 2024 is arranged on the second connecting pipe 2023, and the valve one 2024 adopts existing solenoid valve technologies.

[0028] The output end of the circulation pump 2021 is provided with a third connecting pipe 2025, and the output end of the steam generating mechanism is provided with a fourth connecting pipe 2026. The third connecting pipe 2025, the fourth connecting pipe 2026 and the inlet of the gas storage tank 201 are connected through a second valve 2027. The second valve 2027 adopts the existing three-way valve technology and is used to connect the third connecting pipe 2025 with the inlet of the gas storage tank 201 or to connect the fourth connecting pipe 2026 with the inlet of the gas storage tank 201. The steam provided by the steam generating mechanism can enter the gas storage tank 201 through the fourth connecting pipe 2026 and the second valve 2027, and then flow into the upper sterilization chamber of the steam sterilization cabinet 100 through the outlet of the gas storage tank 201. When the steam volume in the upper sterilization chamber reaches the preset value, the steam generating mechanism stops supplying steam, and the second valve 2027 switches its state. At this time, driven by the circulation pump 2021, the steam in the upper sterilization chamber sequentially enters the gas storage tank 201 through the first connecting pipe 2022 and the third connecting pipe 2025, and then returns to the upper sterilization chamber from the outlet of the gas storage tank 201, realizing circular flow and performing high-temperature steam sterilization treatment on the objects placed on the placement partition 102.

[0029] Further, a third valve is provided at the outlet of the gas storage tank 201, and the existing solenoid valve technology can be adopted.

[0030] Further, a heating element and a temperature sensor are arranged in the gas storage tank 201. During the high-temperature steam sterilization process, the temperature of the steam will inevitably decrease. Therefore, the steam is heated by the heating element to ensure that the steam temperature during sterilization meets the sterilization requirements.

[0031] In a preferred embodiment, refer to Figure 4 , a ultraviolet lamp 104 is arranged above each placement partition 102. The advantage is that the ultraviolet rays emitted by the ultraviolet lamp 104 are used to achieve auxiliary sterilization and improve the sterilization effect.

[0032] A sterilization method for a baking mold sterilization device used for food production: Step 1: Open the cabinet door 101, place the object to be sterilized on the placement partition 102, and close the cabinet door 101; Step 2: Close the first valve 2024, and open the second valve 2027 and the third valve; The steam provided by the steam generating mechanism enters the gas storage tank 201 through the fourth connecting pipe 2026, and then enters the upper sterilization chamber from the outlet of the gas storage tank 201; When the steam in the storage tank 201 and the upper sterilization chamber reaches the preset amount, the valve two 2027 switches its state, so that the inlet of the storage tank 201 is switched from being connected to the fourth connecting pipe 2026 to being connected to the third connecting pipe 2025. At the same time, the circulation pump 2021 is started, so that the steam in the upper sterilization chamber sequentially enters the storage tank 201 through the first connecting pipe 2022 and the third connecting pipe 2025, and then returns to the upper sterilization chamber from the outlet of the storage tank 201, realizing the circulating flow of the steam, performing high-temperature steam sterilization treatment on the objects placed on the partition plate 102. At the same time, the heating element is started to ensure that the temperature of the steam meets the sterilization requirements; Step three: After the preset time, the sterilization is completed and the valve three is closed; The circulation pump 2021 continues to draw the steam to flow. At this time, the steam is stored in the storage tank 201, and the upper sterilization chamber is in a negative pressure state; Step four: The circulation pump 2021 stops running, and the valve one 2024 is opened. Under the action of the negative pressure, the outside cold air enters the upper sterilization chamber through the second connecting pipe 2023 and the first connecting pipe 2022, so that the temperature in the upper sterilization chamber gradually decreases and gradually returns to normal pressure; It should be noted that in order to ensure that the sterilization is not affected, the outside cold air needs to be clean. An air sterilization element (not shown in the figure) can be provided at the end of the second connecting pipe 2023, and existing ultraviolet sterilization technology can be used, etc.; Step five: Open the cabinet door 101, take away the sterilized objects, and put in the next batch of objects to be sterilized, and close the cabinet door 101; Step six: The valve one 2024 is closed, and the valve two 2027 and the valve three are opened; The circulation pump 2021 is started to continue sterilization. At this time, since the steam from the previous time is stored in the storage tank 201, therefore, it can achieve the effect of heat recovery and reuse, and achieve the purpose of energy saving.

[0033] It should be noted that: Due to the power limitation of the circulation pump 2021, in step three of each sterilization, the amount of steam stored in the storage tank 201 is a preset value. Therefore, it is impossible to collect all the steam and store it in the storage tank 201, and there will also be a small amount of steam remaining in the upper sterilization chamber. Since the amount is small, it will not affect the cooling effect of the outside cold air in step four; Since there will be a small amount of steam loss, therefore, during the sterilization process after the first sterilization, steam can be supplemented into the upper sterilization chamber through the steam generating mechanism.

[0034] The advantages of Embodiment 1 are: This solution recycles the steam from the previous sterilization and uses it in the next sterilization. Therefore, it can play the role of heat recovery and reuse, achieving energy saving. Based on this, an example is given (it should be noted that the data mentioned below are examples for ease of understanding. The specific sterilization time and other data vary depending on the type of object to be sterilized): Sterilization lasts for 10 minutes, that is, sterilization ends after 10 minutes, and then from 10 minutes to 10.5 minutes, it is the steam recovery storage process, and from 10.5 minutes to 11 minutes, it is the process of external cold air entering. After 11 minutes, the staff begins to open the cabinet door; During the above-mentioned 10-11 minute period, since the steam is recovered into the gas storage tank, the upper sterilization chamber is in a negative pressure state. Therefore, it can play an effect of restricting the cabinet door from being opened, that is, preventing the staff from opening the cabinet door immediately after the sterilization is completed, which may cause burns. Furthermore, even if the staff forcibly open the cabinet door, under the action of negative pressure, the outside air will flow into the upper sterilization chamber through the gap of the opened cabinet door, thereby limiting the leakage of steam in the upper sterilization chamber and further improving safety. In addition, the entry of cold air from the outside, in addition to restricting the opening of the cabinet door and limiting the leakage of steam, can also reduce the surface temperature of the sterilized objects as much as possible, thereby preventing staff from being scalded by the objects when taking out the sterilized objects.

[0035] Example 2 On the basis of the first embodiment, in order to further improve the sterilization effect, the steam can be made to flow evenly in the upper sterilization chamber. Based on this, the second embodiment is proposed.

[0036] Reference Figure 8 The steam cycle mechanism 200 further includes an auxiliary component 203 .

[0037] The auxiliary assembly 203 includes a rotating shaft 2033 in the shape of a hollow shaft and arranged vertically.

[0038] The lower end of the rotating shaft 2033 is located in the lower installation chamber and is connected to the outlet of the gas tank 201 through the fifth connecting pipe 2034. The fifth connecting pipe 2034 and the rotating shaft 2033 are connected by a rotating joint. The rotating shaft 2033 and the motor 2031 are powered by a power transmission part 2032, and the rotating shaft 2033 can be driven to rotate by the motor 2031.

[0039] The upper end of the rotating shaft 2033 extends into the upper sterilization chamber and is provided with a fan blade 2035 . The interior of the fan blade 2035 is hollow and communicates with the rotating shaft 2033 . The outer surface of the fan blade 2035 is provided with an air outlet 2036 .

[0040] In the process of realizing the sterilization treatment by using the circulating pump 2021 to draw the steam to circulate, the steam in the air storage tank 201 returns to the upper sterilization chamber through the fifth connecting pipe 2034, the rotating shaft 2033, the fan blade 2035, and the air outlet 2036. At the same time, the motor 2031 is started, and the rotating shaft 2033 is driven to rotate through the power transmission member 2032, so that the fan blade 2035 rotates, and the steam is thrown into the upper sterilization chamber by centrifugal force, so that the distribution of the steam in the upper sterilization chamber is more uniform.

[0041] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A baking mold sterilization device for food production, comprising a steam sterilization cabinet (100), the inner cavity of the steam sterilization cabinet (100) is divided into an upper sterilization chamber and a lower installation chamber, characterized in that, A steam circulation mechanism (200) and a steam generation mechanism are arranged in the lower installation chamber. An air hood (103) is arranged at the upper opening of the upper sterilization chamber. The lower end of the air hood (103) is open and the upper end is closed. The steam circulation mechanism (200) includes a gas storage tank (201) and a circulation component (202), and the circulation component (202) includes a circulation pump (2021). The input end of the circulation pump (2021) is provided with a first connecting pipe (2022). The end of the first connecting pipe (2022) is connected to the air hood (103). The outer surface of the first connecting pipe (2022) is provided with a second connecting pipe (2023). The end of the second connecting pipe (2023) is communicated with the outside and a first valve (2024) is arranged on the second connecting pipe (2023). The output end of the circulation pump (2021) is provided with a third connecting pipe (2025). The output end of the steam generation mechanism is provided with a fourth connecting pipe (2026). The third connecting pipe (2025), the fourth connecting pipe (2026) and the inlet of the gas storage tank (201) are connected through a second valve (2027). The second valve (2027) is used to communicate the third connecting pipe (2025) with the inlet of the gas storage tank (201) or to communicate the fourth connecting pipe (2026) with the inlet of the gas storage tank (201). A third valve is arranged at the outlet of the gas storage tank (201).

2. The sterilization device for a baking mold used in food production according to claim 1, wherein, A plurality of placing partitions (102) are arranged in the upper sterilization chamber in a vertical array. An inlet and outlet is opened on the side surface of the upper sterilization chamber, and a cabinet door (101) is arranged at the inlet and outlet in a matching manner.

3. A baking mold sterilization device for food production according to claim 1, characterized in that, A heating element and a temperature sensor are arranged in the gas storage tank (201).

4. A baking mold sterilization device for food production according to claim 2, characterized in that, An ultraviolet lamp (104) is arranged above each placing partition (102).

5. The sterilization device for a baking mold used in food production according to claim 3, characterized in that, An air sterilization element is arranged at the end of the second connecting pipe (2023).

6. A baking mold sterilization device for food production according to claim 5, characterized in that, The outlet of the gas storage tank (201) is communicated with the upper sterilization chamber through an auxiliary component (203).

7. A baking mold sterilization device for food production according to claim 6, characterized in that, The auxiliary component (203) includes a rotating shaft (2033) in the shape of a hollow shaft and arranged vertically. The lower end of the rotating shaft (2033) is located in the lower installation chamber and is connected to the outlet of the gas storage tank (201) through a fifth connecting pipe (2034). The fifth connecting pipe (2034) and the rotating shaft (2033) are connected through a rotary joint. The upper end of the rotating shaft (2033) extends into the upper sterilization chamber and is provided with fan blades (2035). The inside of the fan blades (2035) is hollow and is communicated with the rotating shaft (2033). An air outlet (2036) is arranged on the outer surface of the fan blades (2035).

8. A baking mold sterilization device for food production according to claim 7, characterized in that, The rotating shaft (2033) and a motor (2031) arranged in the lower installation chamber are connected through a power transmission member (2032) to realize power connection.

9. The sterilization method of a baking mold sterilization device for food production according to claim 5, characterized in that, Including the following steps: Step 1: Place the object to be sterilized into the upper sterilization chamber. Step 2: Close the first valve (2024), open the third valve, and the second valve (2027) makes the fourth connecting pipe (2026) communicate with the inlet of the gas storage tank (201). The steam provided by the steam generating mechanism enters the gas storage tank (201) through the fourth connecting pipe (2026), and then enters the upper sterilization chamber from the outlet of the gas storage tank (201); When the steam in the gas storage tank (201) and the upper sterilization chamber reaches a preset amount, the second valve (2027) switches its state. The second valve (2027) connects the third connecting pipe (2025) and the inlet of the gas storage tank (201). At the same time, the circulation pump (2021) starts, so that the steam in the upper sterilization chamber sequentially passes through the first connecting pipe (2022) and the third connecting pipe (2025) and enters the gas storage tank (201), and then returns to the upper sterilization chamber from the outlet of the gas storage tank (201), realizing the cyclic flow of steam, sterilizing the objects in the upper sterilization chamber. At the same time, the heating element starts to ensure that the temperature of the steam meets the sterilization requirements; Step 3: After a preset time, the sterilization is completed and the third valve is closed; The circulation pump (2021) continues to draw the steam to flow. At this time, the steam is stored in the gas storage tank (201), and the upper sterilization chamber is in a negative pressure state; Step 4: The circulation pump (2021) stops running, and the first valve (2024) opens. Under the action of negative pressure, the outside cold air enters the upper sterilization chamber through the second connecting pipe (2023) and the first connecting pipe (2022), so that the temperature in the upper sterilization chamber gradually decreases and gradually returns to normal pressure; Step 5: Take out the objects that have been sterilized in the upper sterilization chamber and put in the next batch of objects to be sterilized; Step 6: The first valve (2024) is closed and the third valve is opened; The circulation pump (2021) starts and continues to draw the steam in the gas storage tank (201) to circulate, realizing sterilization.

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