Sterilization dryer control method

Abstract

The invention discloses a control method of a sterilizing dryer. The control method comprises the following steps that S1, the sterilizing dryer stops conveying packing materials due to faults; s2, if t1gt; if t1 is not greater than t2, entering S3, and if t1 is not greater than t2, entering S4; s3, if T1 is larger than or equal to T0, the temperature in the sterilization dryer is reduced to a proper temperature value T1, the sterilization dryer is made to stop and wait at the proper temperature value T1, and T0lt is met; t1lt; t2; if T1lt; t0, the packaging material is scrapped; and S4, maintaining the standard sterilization temperature T2 of the sterilization dryer, and stopping and waiting at the standard sterilization temperature T2. According to the control method of the sterilization dryer, the packaging material which is expected to be sterilized can be eliminated for other treatment, the packaging material is prevented from being sterilized, and the medicine pollution risk and the packaging material breaking risk are reduced; through judgment of the size relation between the appropriate temperature value T1 and the minimum sterilization temperature value T0, the operation waiting time of the sterilization dryer is shortened while the number of scrapped packing materials is reduced as much as possible, and the comprehensive cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of food and medicine packaging production, and in particular to a sterilization dryer control method. Background Art

[0002] The tunnel sterilization dryer usually forms a linkage line with the upstream bottle washing machine, the downstream filling machine and the capping machine to achieve the aseptic production of medicines. Among them, the tunnel sterilization dryer is used for the process of drying, sterilizing and removing pyrogens of bottle packaging materials, such as Figure 1 As shown in the figure, it is a time-temperature relationship diagram when bottles enter and exit the sterilization dryer normally for normal sterilization. Proper sterilization and pyrogen removal of bottles has become the goal pursued by all manufacturers, that is, neither over-sterilization nor under-sterilization. In the actual production process, the downstream filling machine and capping machine will occasionally fail from time to time, resulting in the need to stop the machine for troubleshooting. At this time, the oven mesh belt in the tunnel sterilization dryer also needs to stop running, so the bottles will stay in the high temperature section and wait for the corresponding length of time (the length of time the packaging material stops conveying). Figure 2 As shown in the figure, the time-temperature relationship diagram when the sterilization dryer fails. If the packaging material stops conveying for too long, it will cause over-sterilization, which will lead to the following effects:

[0003] 1) Long-term baking of medicine bottle packaging materials is prone to black spots or even falling off, which in turn causes foreign matter contamination to the medicine;

[0004] 2) The medicine bottle packaging materials that have been baked for a long time are prone to cold explosion after entering the low-temperature cooling section, and the packaging materials are more likely to break after being squeezed during operation. Summary of the invention

[0005] The present invention aims to solve the problems existing in the prior art in use and provides a sterilization and drying machine control method which can prevent over-sterilization of packaging materials and has low comprehensive cost.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A sterilizing dryer control method comprises the following steps:

[0008] S1, the sterilizing dryer stops conveying packaging materials;

[0009] S2, determine the relationship between the packaging material transportation stop time △t1 and the packaging material temperature resistance boundary time △t2. If △t1>△t2, proceed to S3; if △t1≤△t2, proceed to S4; wherein, the packaging material temperature resistance boundary time △t2 is the maximum sterilization time of the packaging material that is not over-sterilized at the standard sterilization temperature T2;

[0010] S3. Obtain the appropriate temperature value T1 of the sterilization and drying machine during the troubleshooting process based on the duration of the packaging material stop conveyor △t1 and the temperature resistance boundary duration of the packaging material △t2; determine the magnitude relationship between the appropriate temperature value T1 and the minimum sterilization temperature value T0; if T1 ≥ T0, cool down the temperature inside the sterilization and drying machine to the appropriate temperature value T1, and make the sterilization and drying machine wait for shutdown at the appropriate temperature value T1, satisfying T0 < T1 < T2; if T1 < T0, dispose of the packaging material;

[0011] S4. The sterilization and drying machine maintains the standard sterilization temperature T2 and waits for shutdown at the standard sterilization temperature T2.

[0012] As a further improvement of the above technical solution:

[0013] In the step S3, the appropriate temperature value T1 is obtained based on the duration of the packaging material stop conveyor △t1, the temperature resistance boundary duration of the packaging material △t2, and the relational expression Combined, where FH is the equivalent sterilization time (min); T is the actual sterilization temperature (°C); t1 is the sterilization start time (min); t2 is the sterilization end time (min); Z is the sterilization temperature coefficient.

[0014] The minimum value of the FH is 1365 min.

[0015] The minimum sterilization temperature value T0 is 170 °C.

[0016] The standard sterilization temperature T2 is 320 °C.

[0017] The duration of the packaging material stop conveyor △t1 is obtained through evaluation.

[0018] In the S3, after the waiting for shutdown ends, the sterilization and drying machine resumes to the standard sterilization temperature T2 and operates normally, and the packaging material resumes conveyance.

[0019] In the S4, after the waiting for shutdown ends, the sterilization and drying machine operates normally, and the packaging material resumes conveyance.

[0020] The temperature resistance boundary duration of the packaging material △t2 is obtained through testing and calculation.

[0021] The testing and calculation of the temperature resistance boundary duration of the packaging material △t2 include the following steps:

[0022] A1. Test the maximum temperature resistance limit FH of the packaging material max ;

[0023] A2. Calculate the temperature resistance boundary duration △t2 of the packaging material according to

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The control method of the sterilization dryer of the present invention can reduce the temperature of the sterilization dryer in a targeted manner to prevent over-sterilization of the packaging materials, thereby reducing the risk of drug contamination and the risk of packaging material breakage, and can exclude packaging materials that are expected to be over-sterilized for other treatments by judging the size relationship between the packaging material transportation stop time △t1 and the packaging material temperature resistance boundary time △t2. Compared with the technical solution of the packaging materials staying in the high temperature section for shutdown waiting, the control method can reduce the temperature of the sterilization dryer in a targeted manner to prevent over-sterilization of the packaging materials, thereby reducing the risk of drug contamination and packaging material breakage in the packaging materials, and can also exclude packaging materials that are expected to be over-sterilized for other treatments; by judging the size relationship between the appropriate temperature value T1 and the minimum sterilization temperature value T0, the packaging materials in the sterilization dryer are determined to be subjected to cooling sterilization or scrapping, thereby preventing over-sterilization of the packaging materials in the sterilization dryer, and reducing the waiting time for the operation of the sterilization dryer while minimizing the number of scrapped packaging materials, with low overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a time-temperature relationship diagram of the existing sterilization dryer during normal sterilization.

[0027] Figure 2 It is a time-temperature relationship diagram when an existing sterilization dryer fails.

[0028] Figure 3 It is a time-temperature relationship diagram when a sterilizing dryer controlled by the sterilizing dryer control method of the present invention fails.

[0029] Figure 4 It is a flow chart of the control method of the sterilizing dryer of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and defined, terms such as "assembly", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] As Figure 4 shown, the control method of the sterilization and drying machine in this embodiment includes the following steps:

[0035] S1. The sterilization and drying machine stops conveying the packaging material; generally, the sterilization and drying machine stops conveying the packaging material due to a fault.

[0036] S2. Judge the magnitude relationship between the duration Δt1 of the packaging material stop conveying and the temperature tolerance boundary duration Δt2 of the packaging material. If Δt1 > Δt2, go to S3; if Δt1 ≤ Δt2, go to S4; wherein, the temperature tolerance boundary duration Δt2 of the packaging material is the maximum sterilization duration for the packaging material not to be sterilized at the standard sterilization temperature T2.

[0037] S3. According to the duration Δt1 of the packaging material stop conveying and the temperature tolerance boundary duration Δt2 of the packaging material, obtain the appropriate temperature value T1 of the sterilization and drying machine during the troubleshooting process; judge the magnitude relationship between the appropriate temperature value T1 and the lowest sterilization temperature value T0; if T1 ≥ T0, the temperature inside the sterilization and drying machine is cooled to the appropriate temperature value T1, and the sterilization and drying machine performs shutdown waiting at the appropriate temperature value T1, satisfying T0 < T1 < T2; if T1 < T0, the packaging material is scrapped; troubleshooting is carried out during the shutdown waiting.

[0038] S4. The sterilization and drying machine maintains the standard sterilization temperature T2 and performs shutdown waiting at the standard sterilization temperature T2; troubleshooting is carried out during the shutdown waiting.

[0039] In the control method of the sterilization dryer of the present embodiment, the sterilization dryer sterilizes at the standard sterilization temperature T2. When the downstream equipment of the sterilization dryer fails, the sterilization dryer stops conveying the packaging materials. When the packaging material conveying stop time △t1 ≤ the packaging material temperature resistance boundary time △t2, it means that even at the standard sterilization temperature T2, the packaging material will not be over-sterilized if the packaging material conveying stop time △t1 is continued. Therefore, the sterilization dryer maintains the standard sterilization temperature T2 and stops waiting at the standard sterilization temperature T2. When the packaging material conveying stop time △t1 > the packaging material temperature resistance boundary time △t2, it means that if the packaging material is sterilized at the standard sterilization temperature T2 and the packaging material conveying stop time △t1 is continued, the packaging material will be over-sterilized. Therefore, further judgment is required; when the appropriate temperature value T1 ≥ the minimum sterilization temperature value T0, it means that after the sterilization dryer cools down to the appropriate temperature value T1, it will continue to sterilize the packaging material conveying stop time △t1 without over-sterilization. Therefore, if Figure 3 As shown, the temperature in the sterilization dryer is cooled to a suitable temperature value T1, so that the sterilization dryer stops and waits at the suitable temperature value T1; when the suitable temperature value T1 < the minimum sterilization temperature value T0, the sterilization dryer needs to be cooled to below the minimum sterilization temperature value T0, and continue to sterilize the packaging material and stop conveying for a period of time △t1 to avoid over-sterilization. However, when the temperature is cooled below the minimum sterilization temperature value T0, sterilization and pyrogen removal cannot be achieved, and it is easy to cause under-sterilization, and the waiting time is too long. If the sterilization dryer runs and waits for a long time, it is easy to cause the packaging material to deteriorate, and it is not economical. Therefore, the packaging material is scrapped. The control method of the sterilization dryer of this embodiment, by judging the size relationship between the packaging material transportation stopping time △t1 and the packaging material temperature resistance boundary time △t2, can specifically reduce the temperature of the sterilization dryer to prevent the packaging materials from being over-sterilized, thereby reducing the risk of drug contamination and the risk of packaging materials being broken, and can also exclude packaging materials that are expected to be over-sterilized for other treatments; by judging the size relationship between the appropriate temperature value T1 and the minimum sterilization temperature value T0, the packaging materials in the sterilization dryer are determined to be cooled and sterilized or scrapped, thereby preventing the packaging materials in the sterilization dryer from being over-sterilized, and reducing the waiting time for the operation of the sterilization dryer while minimizing the number of scrapped packaging materials, with low overall cost.

[0040] Furthermore, in this embodiment, in step S3, the appropriate temperature value T1 is determined based on the packaging material stopping conveying time △t1, the packaging material temperature resistance boundary time △t2 and the relationship Combined, where FH is the equivalent sterilization time (min); T is the actual sterilization temperature (℃); t1 is the sterilization start time (min); t2 is the sterilization end time (min); and Z is the sterilization temperature coefficient. Substituting the packaging material temperature resistance boundary time △t2 into the above formula, the maximum temperature resistance limit FH of the packaging material can be obtained. max , and then FH maxSubstituting Δt1 into the above formula again, we can get the appropriate temperature value T1.

[0041] Furthermore, in this embodiment, the minimum value of FH is 1365 min.

[0042] Furthermore, in this embodiment, the minimum sterilization temperature value T0 is 170°C.

[0043] Furthermore, in this embodiment, the standard sterilization temperature T2 is 320°C.

[0044] Furthermore, in this embodiment, in S3, after the shutdown waiting period is over (ie, after the troubleshooting is completed), the sterilization dryer is restored to the standard sterilization temperature T2 and operates normally, and the packaging material is transported again.

[0045] Furthermore, in this embodiment, in S4, after the shutdown waiting period is completed (ie, after the troubleshooting is completed), the sterilization dryer operates normally and the packaging material is resumed to be transported.

[0046] Furthermore, in this embodiment, the temperature resistance boundary time Δt2 of the packaging material is obtained through testing and calculation.

[0047] Furthermore, in this embodiment, the test and calculation of the temperature resistance boundary time △t2 of the packaging material includes the following steps: A1, testing the maximum temperature resistance limit FH of the packaging material max ; A2, according to The temperature resistance boundary time △t2 of the packaging material is calculated. Since the temperature resistance boundary time △t2 of the packaging material is not convenient to test directly, the maximum temperature resistance limit FH is first calculated. max Test it, FH max That is, the maximum FH value measured when the packaging material is not sterilized, and then FH max Substituting into the above formula, we can obtain the temperature resistance boundary time △t2 of the packaging material. The calculation process is simple and the result is reliable.

[0048] Furthermore, in this embodiment, the packaging material stop conveying time △t1 is obtained through evaluation. The packaging material stop conveying time △t1 obtained through evaluation is the estimated time. In the actual operation process, the packaging material stop conveying time △t1 and the actual fault time △t3 may be different. After the shutdown waiting is over, further judgment should be made. Specifically, the actual FH value is judged. If FH>FH max , the packaging material shall be scrapped; if FH <FH min , then continue sterilization at standard sterilization temperature T2; if FH min ≤FH≤FH max , the sterilization dryer operates normally and the packaging material is transported again. min The minimum sterilization qualification standard is 1365 minutes.

[0049] The control method of the sterilization dryer of this embodiment, by judging the size relationship between the packaging material stopping conveying time △t1 and the packaging material temperature resistance boundary time △t2, can exclude the packaging materials that are expected to be over-sterilized for other treatment when the packaging materials stop conveying for the length of △t1 at the standard sterilization temperature T2, so as to prevent the packaging materials from being over-sterilized, thereby reducing the risk of drug contamination and the risk of packaging materials being broken; the packaging materials that are expected to be over-sterilized are subjected to temperature reduction sterilization treatment to prevent the packaging materials from being over-sterilized and reduce the packaging materials from being scrapped, and by judging the size relationship between the appropriate temperature value T1 and the minimum sterilization temperature value T0, the packaging materials whose temperature is reduced too much (below T0) and whose waiting time for the sterilization dryer is too long are excluded and scrapped, so as to reduce the number of scrapped packaging materials while reducing the running waiting time of the sterilization dryer, and the overall cost is low.

[0050] The above symbols (△t1, △t2, etc.) correspond to the names and can be represented by the name or the symbol, or by the name followed by the symbol. For example, the duration of packaging material transportation stopping, △t1, and the duration of packaging material transportation stopping △t1 all indicate the duration of packaging material transportation stopping.

[0051] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sterilizing dryer control method, characterized in that: Including the following steps: S1. The sterilization dryer stops conveying the packaging materials; S2. Judge the magnitude relationship between the duration Δt1 of the stop of conveying the packaging materials and the temperature tolerance boundary duration Δt2 of the packaging materials. If Δt1 > Δt2, go to S3; if Δt1 ≤ Δt2, go to S4. Wherein, the temperature tolerance boundary duration Δt2 of the packaging materials is the maximum sterilization duration for the packaging materials not to be sterilized at the standard sterilization temperature T2; S3. Obtain the appropriate temperature value T1 of the sterilization dryer during the shutdown waiting process according to the duration Δt1 of the stop of conveying the packaging materials and the temperature tolerance boundary duration Δt2 of the packaging materials. Judge the magnitude relationship between the appropriate temperature value T1 and the lowest sterilization temperature value T0. If T1 ≥ T0, the temperature in the sterilization dryer is cooled down to the appropriate temperature value T1, and the sterilization dryer performs shutdown waiting at the appropriate temperature value T1, satisfying T0 < T1 < T2. If T1 < T0, the packaging materials are disposed of; S4. The sterilization dryer maintains the standard sterilization temperature T2 and performs shutdown waiting at the standard sterilization temperature T2; 2. The sterilizing dryer control method according to claim 1, characterized in that: In step S3, the appropriate temperature value T1 is determined based on the packaging material stopping conveying time △t1, the packaging material temperature resistance limit time △t2 and the relationship Combined to obtain, where FH is the equivalent sterilization time (min); T is the actual sterilization temperature (℃); t1 is the sterilization start time (min); t2 is the sterilization end time (min); and Z is the sterilization temperature coefficient.

3. The sterilizing dryer control method according to claim 2, characterized in that: The minimum value of the FH is 1365 min.

4. The sterilizing dryer control method according to claim 1, characterized in that: The lowest sterilization temperature value T0 is 170 °C.

5. The sterilizing dryer control method according to claim 1, characterized in that: The standard sterilization temperature T2 is 320 °C.

6. The sterilizing dryer control method according to claim 1, characterized in that: The duration Δt1 of the stop of conveying the packaging materials is obtained through evaluation; 7. The sterilizing dryer control method according to any one of claims 1 to 6, characterized in that: In S3, after the shutdown waiting ends, the sterilization dryer resumes to the standard sterilization temperature T2 and operates normally, and the conveying of the packaging materials resumes; 8. The sterilizing dryer control method according to any one of claims 1 to 6, characterized in that: In S4, after the shutdown waiting ends, the sterilization dryer operates normally, and the conveying of the packaging materials resumes; 9. The sterilizing dryer control method according to any one of claims 1 to 6, characterized in that: The temperature tolerance boundary duration Δt2 of the packaging materials is obtained through testing and calculation; 10. The sterilizing dryer control method according to claim 9, characterized in that: The testing and calculation of the temperature tolerance boundary duration Δt2 of the packaging materials include the following steps: A1. Test the maximum temperature limit of packaging materials FH max ; A2. According to Calculate and obtain the temperature resistance boundary time △t2 of the packaging material.

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