Sterilization device and sterilization program control method

Abstract

The invention relates to the technical field of sterilization, discloses a sterilization device and further discloses a sterilization program control method. The sterilization device comprises a sterilization cabinet body; an air inlet pipeline capable of introducing pure steam into the sterilization cabinet body is also arranged at the top of the sterilization cabinet body; the two side surfaces of the sterilization cabinet body are correspondingly connected with the two ends of the air pipe; a heating heat exchanger and a cooling heat exchanger are arranged on the air pipe; and an air inlet fan for feeding air into the air pipe is arranged between the cooling heat exchanger and the sterilization cabinet body. The air inlet pipeline is used for introducing pure steam into the sterilization cabinet body, and a product placed in the sterilization cabinet body is sterilized through the high temperature of the pure steam; the pure steam is stopped from being introduced, the air inlet fan is started, after the gas in the sterilization cabinet enters the cooling heat exchanger, gas-liquid separation is carried out, water vapor in the gas is cooled into condensed water to be left in the cooling heat exchanger, and the remaining gas in the gas enters the heating heat exchanger to be heated, returns to the sterilization cabinet and continuously heats and dries products.

Description

Technical Field

[0001] The invention relates to the technical field of sterilization, and in particular to a sterilization device.

[0002] The present invention also relates to a sterilization program control method applied to the above sterilization device. Background Art

[0003] The quality of the liquid cavity of the powder-liquid double-chamber bag product must be ensured during the sterilization process. After sterilization, the powder cavity of the sterilized product must be dried. After drying, it must be ensured that there is no water accumulation on the surface of the powder-liquid double-chamber bag body, and the moisture in the powder cavity must also meet production requirements.

[0004] The existing sterilization device only sterilizes the product and has no drying function; the existing sterilization device only dries the outer surface of the product and does not dry the inside of the powder, which cannot meet the production requirements of powder-liquid double-chamber bags.

[0005] In the absence of a drying function, the program control method of the existing sterilization equipment lacks control over the drying program, which is not convenient for the production of powder-liquid double-chamber bags. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a sterilization device to solve the problem that the sterilization device in the prior art dries the outer surface of the product but does not dry the inside of the powder, thereby failing to meet the production requirements of the powder-liquid double-chamber bag.

[0007] In order to solve the above problems, the present invention also provides a sterilization program control method applied to the above sterilization device.

[0008] A sterilization device comprises a sterilization cabinet: an air intake duct capable of introducing pure steam into the sterilization cabinet is also arranged on the top of the sterilization cabinet; two sides of the sterilization cabinet are correspondingly connected to two ends of an air duct; a heating heat exchanger and a cooling heat exchanger are arranged on the air duct; an air intake fan for introducing air into the air duct is arranged between the cooling heat exchanger and the sterilization cabinet.

[0009] Furthermore, an exhaust fan for extracting air into the sterilization cabinet is provided between the heating heat exchanger and the sterilization cabinet.

[0010] Furthermore, a first drain pipe is provided on the cooling heat exchanger, and a second drain pipe is provided at the bottom of the sterilization cabinet.

[0011] Furthermore, the sterilization cabinet is provided with an internal heat exchanger for heating the interior of the sterilization cabinet.

[0012] Furthermore, the air inlet pipeline is provided with a first air inlet for introducing pure steam, and a second air inlet for introducing pure compressed air.

[0013] Furthermore, a fan is provided on the top of the sterilization cabinet.

[0014] A sterilization program control method, using a sterilization device as described above, comprises the following steps: The first step is preheating: heating the interior of the sterilization cabinet through an internal heat exchanger until the temperature inside the sterilization cabinet reaches a first set temperature value; The second step is heating: introducing pure steam and turning on the fan until the temperature of the product in the sterilization cabinet reaches the second set temperature value; Step 3, sterilization: maintain the second set temperature value to the first set time, and the F0 value reaches the set value; Step 4, drying: turn off the fan, start the air supply fan and the exhaust fan, cool the gas to the third set temperature value through the cooling heat exchanger to complete the gas-liquid separation, and the separated gas is heated to the fourth set temperature value through the heating heat exchanger and then flows into the sterilization cabinet; at the same time, pure compressed air is introduced into the sterilization cabinet to pressurize the sterilization cabinet, and condensed water is discharged through the first drain pipe and the second drain pipe; Step 5: Cooling down: Turn off the heating heat exchanger until the temperature inside the sterilization cabinet reaches the fifth set temperature value; Step 6, exhaust: turn off the cooling heat exchanger, and exhaust the sterilization cabinet through the second drain pipe until the air pressure in the sterilization cabinet reaches the second set pressure value; Step 7. The program ends.

[0015] Furthermore, in the third step, the pressure inside the sterilization cabinet needs to reach a first set pressure value.

[0016] Beneficial effects: The air inlet pipe is used to introduce pure steam into the sterilization cabinet, and the high temperature of the pure steam is used to sterilize the products placed in the sterilization cabinet; stop introducing pure steam, start the air inlet fan, and the gas in the sterilization cabinet enters the cooling heat exchanger, where the gas and liquid are separated. The water vapor in the gas is cooled into condensed water and remains in the cooling heat exchanger. The remaining gas in the gas enters the heating heat exchanger and is heated before returning to the sterilization cabinet, maintaining a high temperature environment in the sterilization cabinet. The above process is repeated until the product is dried to meet production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the device according to Embodiment 1 of the present invention; Figure 2 This is a flow chart of the sterilization program control method of Example 2 of the present invention.

[0019] In the figure: 1. Sterilization cabinet; 201. First internal heat exchanger; 202. Second internal heat exchanger; 3. Air inlet duct; 301. First air inlet; 302. Second air inlet; 4. Fan; 5. Product; 6. Exhaust fan; 7. Air inlet fan; 8. Air duct; 9. Heating heat exchanger; 10. Cooling heat exchanger; 1101. First drain pipe; 1102. Second drain pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0021] It should be noted that the embodiments of the present invention and the features involved in the embodiments can be combined with each other without conflict. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] A sterilization device comprises a sterilization cabinet 1: an air intake duct 3 capable of introducing pure steam into the sterilization cabinet 1 is also arranged on the top of the sterilization cabinet 1; two side surfaces of the sterilization cabinet 1 are correspondingly connected to two ends of an air duct 8; a heating heat exchanger 9 and a cooling heat exchanger 10 are arranged on the air duct 8; an air intake fan 7 is arranged on the air duct 8, and the air intake fan 7 draws the gas in the sterilization cabinet 1 into the air duct 8, and the gas flows through the cooling heat exchanger 10 and the heating heat exchanger 9 in sequence and then flows back into the sterilization cabinet 1.

[0024] In this embodiment, the air inlet pipe 3 is used to introduce pure steam into the sterilization cabinet 1, and the product 5 placed in the sterilization cabinet 1 is sterilized by the high temperature of the pure steam; the introduction of pure steam is stopped, and the air inlet fan 7 is started. After the gas in the sterilization cabinet 1 enters the cooling heat exchanger 10, the gas and liquid are separated, and the water vapor in the gas is cooled into condensed water and remains in the cooling heat exchanger 10. The remaining gas in the gas enters the heating heat exchanger 9 and is heated and then returns to the sterilization cabinet 1, maintaining the high temperature environment in the sterilization cabinet 1. The above process is repeated until the product 5 is dried to the production requirements.

[0025] The air inlet fan 7 is installed between the cooling heat exchanger 10 and the sterilizing cabinet 1 , and the exhaust fan 64 is installed between the heating heat exchanger 9 and the sterilizing cabinet 1 .

[0026] In this embodiment, the air inlet fan 7 is used to supply air into the air duct 8, and the exhaust fan 64 is used to draw the gas in the air duct 8 into the sterilization cabinet 1; the air inlet fan 7 and the exhaust fan 64 are set to ensure the flow direction and flow speed of the gas in the air duct 8 to ensure the progress of the drying process.

[0027] A first drain pipe 1101 for discharging condensed water is provided on the cooling heat exchanger 10, and a second drain pipe 1102 for discharging condensed water is provided at the bottom of the sterilization cabinet 1; the first drain pipe 1101 is provided at the bottom of the cooling heat exchanger 10. For the convenience of observation, it is drawn on the upper part of the cooling heat exchanger 10, but it should actually be provided at the bottom.

[0028] In this embodiment, the first drain pipe 1101 and the second drain pipe 1102 are provided to facilitate the discharge of condensed water.

[0029] An internal heat exchanger is disposed in the sterilization cabinet 1 , and there are two internal heat exchangers, one of which is a first internal heat exchanger 201 , and the other is a second internal heat exchanger 202 .

[0030] In this embodiment, the first internal heat exchanger 201 and the second internal heat exchanger 202 are used to exchange heat with external industrial steam to preheat the gas inside the sterilization cabinet 1. The use of industrial steam is to recover waste heat, which is more environmentally friendly.

[0031] An air inlet duct 3 is arranged on the top of the sterilization cabinet 1 , and the air inlet duct 3 is provided with a first air inlet 301 and a second air inlet 302 ; the first air inlet 301 is used to introduce pure steam into the sterilization cabinet 1 ; the second air inlet 302 is used to introduce clean compressed air into the sterilization cabinet 1 .

[0032] In this embodiment, clean compressed air is used to pressurize the air in the sterilization cabinet 1 to facilitate the discharge of cooling water in the sterilization cabinet 1 and the cooling heat exchanger 10 .

[0033] A fan 4 is arranged on the top of the sterilization cabinet 1 .

[0034] In this embodiment, the fan 4 is used to stir the pure steam introduced into the sterilization cabinet 1 so that the high-temperature pure steam passes evenly through the surface of the product 5, thereby achieving the purpose of heating the product 5.

[0035] The sterilizing cabinet 1 is provided with a temperature sensor and a pressure sensor, and a control system in the prior art connected to the temperature sensor and the pressure sensor, and a control program is provided in the control system. The product 5 may be provided with a co-extrusion film in the prior art, and the co-extrusion film is used for the seepage of water in the powder cavity. Valves are provided on the first air inlet 301, the second air inlet 302, the first drain pipe 1101 and the second drain pipe 1102, respectively.

[0036] Example 2

[0037] like Figure 1 and Figure 2 As shown, a sterilization program control method applied to the above sterilization device comprises the following steps: The first step is preheating; the second step is heating; the third step is sterilization; the fourth step is drying; the fifth step is cooling; the sixth step is exhausting; the seventh step is ending the program; Specifically, the first step is preheating: industrial steam is introduced into the first internal heat exchanger 201 and the second internal heat exchanger 202 to preheat the interior of the sterilization cabinet through the first internal heat exchanger 201 and the second internal heat exchanger 202 until the temperature inside the sterilization cabinet reaches the first set temperature value, and then the second step is entered; Step 2: Heating: The first internal heat exchanger 201 and the second internal heat exchanger 202 stop heating the interior of the sterilizer, then pure steam is introduced into the sterilizer and the fan 4 is turned on. The fan 4 blows the pure steam evenly onto the surface of the product 5 and heats the product 5 with the pure steam until the temperature of the product reaches the second set temperature value, and then the process proceeds to step 3. Step 3, sterilization: After the temperature value of the product 5 is maintained at the second set temperature value for the first set time, and after the F0 value reaches the set value, the sterilization is completed and the fourth step is entered; the F0 value is the standard sterilization time in the prior art; during sterilization, it is necessary to ensure that the pressure in the sterilization cabinet reaches the first set pressure value to meet the requirements of the product production process; Step 4, drying: turn off the fan 4, start the air supply fan 4 and the exhaust fan 64 to circulate the gas between the air duct and the sterilization cabinet, cool the gas sent into the air duct 8 to the third set temperature value through the cooling heat exchanger 10 to complete the gas-liquid separation, then heat the cooled gas to the fourth set temperature value through the heating heat exchanger 9 and send it back into the sterilization cabinet 1, and at the same time, introduce pure compressed air into the sterilization cabinet 1 for pressurization, and discharge condensed water through the first drain pipe 1101 and the second drain pipe 1102, and turn to the fifth step after the drying time reaches the third set time; Step 5, cooling: turn off the heating heat exchanger 9, and after the temperature in the sterilization cabinet 1 reaches the fifth set temperature value, turn off the cooling heat exchanger 10 and proceed to step 6; Step 6, exhaust: the second drain pipe 1102 at the bottom of the sterilizing cabinet 1 also serves as an exhaust pipe to exhaust the excess gas in the sterilizing cabinet 1, so that the pressure in the sterilizing cabinet 1 reaches the second set pressure value, and then proceeds to step 7; wherein the set pressure value can be the indoor pressure value; Step 7. The program ends.

[0038] In this embodiment, the device can be better controlled through the above program steps to just complete the drying and sterilization of the powder. The above-mentioned set temperature value, set pressure value and set time, etc., can be set accordingly according to the actual production process. The specific setting method is the existing technology and will not be described in detail here.

[0039] Although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sterilization device, characterized in that: It comprises a sterilizing cabinet: the top of the sterilizing cabinet is also provided with an air intake duct capable of introducing pure steam into the sterilizing cabinet; the two sides of the sterilizing cabinet are correspondingly connected to the two ends of the air duct; a heating heat exchanger and a cooling heat exchanger are arranged on the air duct; an air intake fan for introducing air into the air duct is arranged between the cooling heat exchanger and the sterilizing cabinet.

2. A sterilization device according to claim 1, characterized in that: An exhaust fan for extracting air into the sterilization cabinet is arranged between the heating heat exchanger and the sterilization cabinet.

3. A sterilization device according to claim 2, characterized in that: The cooling heat exchanger is provided with a first drain pipe, and the bottom of the sterilizing cabinet is provided with a second drain pipe.

4. A sterilization device according to claim 3, characterized in that: The sterilizing cabinet is provided with an internal heat exchanger for heating the interior of the sterilizing cabinet.

5. A sterilization device according to claim 4, characterized in that: The air inlet pipeline is provided with a first air inlet for introducing pure steam, and a second air inlet for introducing pure compressed air.

6. A sterilization device according to claim 5, characterized in that: A fan is arranged on the top of the sterilization cabinet.

7. A sterilization program control method, using a sterilization device as claimed in claim 6, characterized in that: The steps include: The first step is preheating: heating the interior of the sterilization cabinet through an internal heat exchanger until the temperature inside the sterilization cabinet reaches a first set temperature value; The second step is heating: introducing pure steam and turning on the fan until the temperature of the product in the sterilization cabinet reaches the second set temperature value; Step 3, sterilization: maintain the second set temperature value to the first set time, and the F0 value reaches the set value; Step 4, drying: turn off the fan, start the air supply fan and the exhaust fan, cool the gas to the third set temperature value through the cooling heat exchanger to complete the gas-liquid separation, and the separated gas is heated to the fourth set temperature value through the heating heat exchanger and then flows into the sterilization cabinet; at the same time, pure compressed air is introduced into the sterilization cabinet to pressurize the sterilization cabinet, and condensed water is discharged through the first drain pipe and the second drain pipe; Step 5: Cooling down: Turn off the heating heat exchanger until the temperature inside the sterilization cabinet reaches the fifth set temperature value; Step 6, exhaust: turn off the cooling heat exchanger, and exhaust the sterilization cabinet through the second drain pipe until the air pressure in the sterilization cabinet reaches the second set pressure value; Step 7. The program ends.

8. A sterilization process control method according to claim 7, characterized in that: In the third step, the pressure in the sterilization cabinet needs to reach a first set pressure value.

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