CN115531564B - Method and device for sterilization temperature control, steam sterilizer and storage medium - Google Patents
Method and device for sterilization temperature control, steam sterilizer and storage medium Download PDFInfo
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- CN115531564B CN115531564B CN202211008502.XA CN202211008502A CN115531564B CN 115531564 B CN115531564 B CN 115531564B CN 202211008502 A CN202211008502 A CN 202211008502A CN 115531564 B CN115531564 B CN 115531564B
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- 230000001954 sterilising effect Effects 0.000 title claims abstract description 132
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 148
- 230000008859 change Effects 0.000 abstract description 9
- 239000002609 medium Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 13
- 238000012937 correction Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- -1 surgical instruments Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/04—Heat
- A61L2/06—Hot gas
- A61L2/07—Steam
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/24—Apparatus using programmed or automatic operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The application relates to the technical field of sterilization equipment, and discloses a method for controlling sterilization temperature, which comprises the following steps: detecting the temperature in the cavity of the steam sterilizer; detecting the pressure in the cavity of the steam sterilizer; and controlling the operation of the heating device according to the temperature in the cavity and the pressure in the cavity. As the pressure in the cavity is larger than the change range of the temperature in the cavity in the sterilization temperature adjustment range. Based on the temperature and pressure in the cavity, the overshoot of the temperature in the cavity is small when the heating device is controlled. By reducing the overshoot of the temperature in the cavity relative to the target sterilization temperature, the accuracy of the temperature control in the steam sterilizer cavity is improved in the sterilization mode. The application also discloses a device for sterilization temperature control, a steam sterilizer and a storage medium.
Description
Technical Field
The present application relates to the field of sterilization equipment technology, for example, to a method and apparatus for sterilization temperature control, a steam sterilizer, and a storage medium.
Background
At present, a steam sterilizer is a sterilization device which uses steam as a sterilization medium, and kills all microorganisms comprising spores through high-temperature and high-pressure steam, and has the characteristics of good sterilization effect and wide application range. However, the object to be sterilized has a high requirement for sterilization temperature, and the actual temperature needs to be accurately controlled.
In the related art, a steam sterilizer temperature control method includes: acquiring actual inner chamber temperatures at different moments; obtaining an actual temperature change rate according to the actual inner chamber temperature; judging whether the actual inner chamber temperature is less than a preset sterilization temperature or not; if yes, entering a heating mode, and adjusting the opening of the steam inlet valve according to the preset temperature change rate when the deviation between the actual temperature change rate and the preset temperature change rate exceeds a first preset deviation so as to enable the actual temperature change rate to be consistent with the preset temperature change rate; if not, entering a sterilization mode, and adjusting the opening of the steam inlet valve according to the received preset sterilization temperature and the preset temperature deviation to enable the actual inner chamber temperature to be between the preset sterilization temperature and the sum of the preset sterilization temperature and the preset temperature deviation.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the method can adjust the current operation mode according to the actual inner chamber temperature and the preset sterilization temperature of the steam sterilizer, and realize high-temperature sterilization in the sterilization mode. However, the temperature adjustment range in the sterilization mode is narrow, and when the actual inner chamber temperature is adjusted according to the deviation between the sterilization temperature and the preset temperature, the problem of low accuracy of the actual inner chamber temperature control exists.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for sterilization temperature control, a steam sterilizer and a storage medium, so that the accuracy of temperature control in a cavity of the steam sterilizer is improved in a sterilization mode.
In some embodiments, the method comprises: detecting the temperature in the cavity of the steam sterilizer; detecting the pressure in the cavity of the steam sterilizer; and controlling the operation of the heating device according to the temperature in the cavity and the pressure in the cavity.
Optionally, controlling the operation of the heating device according to the temperature in the cavity and the pressure in the cavity comprises: under the condition that the temperature in the cavity and the pressure in the cavity meet the first preset condition, determining the heating speed of the heating device according to the temperature in the cavity; controlling the operation of the heating device according to the heating speed; and turning off the heating device under the condition that the temperature in the cavity and the pressure in the cavity meet the second preset condition.
Optionally, the intra-cavity temperature and intra-cavity pressure meet a first preset condition, including: the temperature in the cavity is larger than the first set temperature and smaller than or equal to the second set temperature; or, when the temperature in the cavity is greater than the second set temperature and less than or equal to the third set temperature, the pressure in the cavity is less than the reference pressure; the intra-cavity temperature and intra-cavity pressure satisfy a second preset condition comprising: the temperature in the cavity is greater than a third set temperature; or the pressure in the cavity is larger than or equal to the reference pressure when the temperature in the cavity is larger than the second set temperature and smaller than or equal to the third set temperature.
Optionally, determining the heating rate of the heating device according to the temperature in the cavity includes: determining a temperature difference between the target sterilization temperature and the temperature in the cavity; determining an interval time and a heating time corresponding to the temperature difference value; wherein, the larger the temperature difference value is, the shorter the interval time is, and the longer the heating time is; the heating rate is adjusted by varying the interval time and the heating time.
Optionally, controlling the operation of the heating device according to the heating speed includes: turning on the heating device when the time of turning off the heating device is greater than or equal to the interval time; in case the time to turn on the heating means is equal to the heating time, the heating means is turned off.
Optionally, after controlling the operation of the heating device according to the temperature in the cavity and the pressure in the cavity, the method further comprises: the reference pressure is adjusted according to the intra-cavity temperature and intra-cavity pressure.
Optionally, adjusting the reference pressure based on the intra-cavity temperature and intra-cavity pressure includes: increasing the reference pressure under the condition that the intra-cavity temperature and intra-cavity pressure meet a third preset condition; under the condition that the temperature in the cavity and the pressure in the cavity meet a fourth preset condition, keeping the reference pressure unchanged; and reducing the reference pressure in the case that the temperature in the cavity meets a fifth preset condition.
In some embodiments, the apparatus comprises a processor and a memory storing program instructions, the processor being configured to perform the above-described method for sterilization temperature control when the program instructions are run.
In some embodiments, the steam sterilizer comprises the apparatus for sterilization temperature control described above.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for sterilization temperature control described above.
The method and the device for controlling the sterilization temperature, the steam sterilizer and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
in the sterilization mode, the temperature in the cavity of the steam sterilizer is detected, and the current sterilization temperature is determined. The pressure in the cavity of the steam sterilizer is detected and used for accurately adjusting the temperature in the cavity. And controlling the heating device to operate according to the temperature in the cavity and the pressure in the cavity, so that the temperature in the cavity gradually reaches the target sterilization temperature. As the pressure in the cavity is larger than the change range of the temperature in the cavity in the sterilization temperature adjustment range. Based on the temperature and pressure in the cavity, the overshoot of the temperature in the cavity is small when the heating device is controlled. By reducing the overshoot of the temperature in the cavity relative to the target sterilization temperature, the accuracy of the temperature control in the steam sterilizer cavity is improved in the sterilization mode.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic illustration of a method for sterilization temperature control provided by an embodiment of the present disclosure;
FIG. 2 is a schematic illustration of another method for sterilization temperature control provided by an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of another method for sterilization temperature control provided by an embodiment of the present disclosure;
FIG. 4 is a schematic illustration of another method for sterilization temperature control provided by an embodiment of the present disclosure;
FIG. 5 is a schematic illustration of another method for sterilization temperature control provided by an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an apparatus for sterilization temperature control provided by an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
At present, a steam sterilizer is a sterilization device which uses steam as a sterilization medium, and kills all microorganisms comprising spores through high-temperature and high-pressure steam, and has the characteristics of good sterilization effect and wide application range. The sterilization method adopts water vapor to sterilize, so that air pollution to a laboratory is avoided, and the sterilization method is suitable for sterilizing common culture medium, physiological saline, surgical instruments, glass containers, syringes, dressings and other articles. However, the sterilization temperature of the object to be sterilized is high, and if the temperature is not controlled, the object to be sterilized is damaged, for example, carbonization phenomenon occurs after the fiber object is sterilized for a plurality of times. When the sterilization temperature is controlled, 134℃is generally selected as the sterilization set temperature. On the basis of the sterilization set temperature, the temperature is increased by 1-2 ℃ to serve as a target sterilization temperature, so that the problem that the actual sterilization temperature cannot sterilize due to fluctuation lower than the sterilization set temperature is avoided. The existing method for controlling the sterilization temperature of the steam sterilizer is to stop heating when the actual sterilization temperature reaches the target sterilization temperature by detecting the actual sterilization temperature. However, since the heating device is turned off, there is a residual temperature, which may cause the actual sterilization temperature to exceed the target sterilization temperature by about 2 ℃ (i.e., 3 to 4 ℃ above the sterilization setting temperature), resulting in damage to the sterilization object.
The overlapping temperature of the sterilization set temperature is small, the temperature adjustment range is narrow, and the error is large and the hysteresis exists during detection. For example, with a superimposed 1 ℃ for example, the detection accuracy is 0.1 ℃, then there are only 10 discernable temperature values. When the heating device heats, a plurality of temperature values may be crossed by short-time heating, and accurate control of the actual sterilization temperature is difficult. The steam pressure is adjusted to about 10Kpa corresponding to a temperature adjustment range of 1 c, i.e., the steam pressure is different by about 10Kpa between 134 c and 135 c. Because the adjustment range of steam pressure is wide, the error is small during detection, and accurate control is convenient to realize.
The embodiment of the disclosure provides a steam sterilizer, which comprises a body, a heating device, a temperature sensor, a pressure sensor and a processor. The body is filled with water. The heating device is arranged in the body and is used for heating water to form water vapor. The heating device can be an electric heating tube, an electric heating wire or a heating element, etc. The heating speed can not be adjusted by adjusting the real-time power of the heating device by changing the interval time and the heating time of the heating device. The temperature sensor is arranged in the body and is used for detecting the temperature in the cavity (actual sterilization temperature). The pressure sensor is disposed in the body for detecting the pressure in the cavity (vapor pressure). The processor is arranged in the body, is electrically connected with the heating device, the temperature sensor and the pressure sensor, and is configured to control the operation of the heating device according to the temperature in the cavity and the pressure in the cavity. During the heating process of the heating device, the temperature in the cavity gradually increases, and the pressure in the cavity increases along with the increase of the temperature in the cavity.
As shown in conjunction with fig. 1, an embodiment of the present disclosure provides a method for sterilization temperature control, comprising:
s210, detecting the temperature in the cavity of the steam sterilizer by a temperature sensor.
S220, detecting the intra-cavity pressure of the steam sterilizer by the pressure sensor.
And S230, the processor controls the operation of the heating device according to the temperature in the cavity and the pressure in the cavity.
By adopting the method for controlling the sterilization temperature, which is provided by the embodiment of the disclosure, in a sterilization mode, the temperature in the cavity of the steam sterilizer is detected, and the current sterilization temperature is determined. The pressure in the cavity of the steam sterilizer is detected and used for accurately adjusting the temperature in the cavity. And controlling the heating device to operate according to the temperature in the cavity and the pressure in the cavity, so that the temperature in the cavity gradually reaches the target sterilization temperature. As the pressure in the cavity is larger than the change range of the temperature in the cavity in the sterilization temperature adjustment range. Based on the temperature and pressure in the cavity, the overshoot of the temperature in the cavity is small when the heating device is controlled. By reducing the overshoot of the temperature in the cavity relative to the target sterilization temperature, the accuracy of the temperature control in the steam sterilizer cavity is improved in the sterilization mode.
As shown in connection with fig. 2, an embodiment of the present disclosure provides another method for sterilization temperature control, comprising:
s210, detecting the temperature in the cavity of the steam sterilizer by a temperature sensor.
S220, detecting the intra-cavity pressure of the steam sterilizer by the pressure sensor.
S231, under the condition that the temperature in the cavity and the pressure in the cavity meet the first preset condition, the processor determines the heating speed of the heating device according to the temperature in the cavity.
S232, the processor controls the heating device to operate according to the heating speed, and returns to the step S210.
S237, in the case that the intra-cavity temperature and intra-cavity pressure satisfy the second preset condition, the processor turns off the heating device, and returns to step S210.
By adopting the method for controlling the sterilization temperature, under the condition that the temperature in the cavity and the pressure in the cavity meet the first preset condition, the temperature in the cavity does not reach the target sterilization temperature or the pressure in the cavity is lower, and the temperature in the cavity and the pressure in the cavity need to be increased by the heating device. The heating rate is determined based on the temperature in the chamber. The heating device is controlled to operate according to the heating speed, and heating is carried out at different speeds in different sterilization temperature control processes, so that the temperature in the cavity is quickly increased, and meanwhile, the overshoot relative to the target sterilization temperature is reduced. Under the condition that the temperature in the cavity and the pressure in the cavity meet the second preset condition, the temperature in the cavity reaches the target sterilization temperature or the pressure in the cavity is large, and the problems of excessive temperature overshoot or too fast temperature rise exist. By closing the heating device, the temperature and the pressure in the cavity are gradually reduced, so that the overshoot of the temperature in the cavity is reduced, and the accuracy of the temperature control in the cavity of the steam sterilizer is improved.
Optionally, the intra-cavity temperature and intra-cavity pressure in step S231 satisfy a first preset condition, including: the temperature in the cavity is larger than the first set temperature and smaller than or equal to the second set temperature; or the pressure in the cavity is smaller than the reference pressure when the temperature in the cavity is larger than the second set temperature and smaller than or equal to the third set temperature. The intra-cavity temperature and intra-cavity pressure in step S237 satisfy the second preset condition, including: the temperature in the cavity is greater than a third set temperature; or the pressure in the cavity is larger than or equal to the reference pressure when the temperature in the cavity is larger than the second set temperature and smaller than or equal to the third set temperature. Thus, when the temperature in the cavity is greater than the first set temperature and less than or equal to the second set temperature, the sterilization temperature control process is in the initial stage of temperature control, and rapid temperature rise is required to be realized through the operation of the heating device so as to reduce the temperature rise time. At this time, the temperature in the cavity is far away from the target sterilization temperature, so that the problem of excessive temperature is avoided, and the pressure in the cavity does not need to be considered during heating. When the temperature in the cavity is greater than the second set temperature and less than or equal to the third set temperature, the sterilization temperature control process is in a temperature control stable period, and the problem of overshoot may exist. Because the pressure adjustment range is wide and the response is quick, the overshoot of the temperature in the cavity relative to the target sterilization temperature is reduced by controlling the operation or the closing of the heating device by comparing the pressure in the cavity with the reference pressure. When the temperature in the cavity is higher than the third set temperature, the temperature in the cavity exceeds the target sterilization temperature, and the sterilization object is damaged by continuing to heat. The temperature in the cavity is gradually reduced by closing the heating device, the overshoot of the temperature in the cavity relative to the target sterilization temperature is reduced, and the accuracy of the temperature control in the cavity of the steam sterilizer is improved.
Optionally, the first set temperature has a value in the range of 134, 134.2 deg.c. Preferably, the first set temperature takes a value of 134.1 ℃. The value range of the second set temperature is [134.5, 134.7] ℃. Preferably, the second set temperature takes a value of 134.6 ℃. The value range of the third set temperature is [135.4, 135.6 ]. Preferably, the third set temperature takes a value of 135.5 ℃. In this way, when the value of the first set temperature is within the above range, the sterilization temperature control of the steam sterilizer is started in the initial stage of the temperature control, and the steam sterilization is performed. When the value of the second set temperature is within the above range, the temperature control is started and the temperature control is stabilized, so that different processes can be distinguished to adopt different control modes for the heating device. When the value of the third set temperature is in the range, the sterilization temperature of the steam sterilizer reaches the target sterilization temperature, and a certain overshoot margin (0.5 ℃) exists to prevent the object to be sterilized from being damaged due to the waste heat of the heating device.
As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for sterilization temperature control, comprising:
s210, detecting the temperature in the cavity of the steam sterilizer by a temperature sensor.
S220, detecting the intra-cavity pressure of the steam sterilizer by the pressure sensor.
S233, under the condition that the intra-cavity temperature and the intra-cavity pressure meet the first preset condition, the processor determines a temperature difference value between the target sterilization temperature and the intra-cavity temperature.
S234, the processor determines an interval time and a heating time corresponding to the temperature difference value.
S235, when the time for turning off the heating device is greater than or equal to the interval time, the processor turns on the heating device.
S236, in the case where the time for turning on the heating device is equal to the heating time, the processor turns off the heating device and returns to step S210.
S237, in the case that the intra-cavity temperature and intra-cavity pressure satisfy the second preset condition, the processor turns off the heating device, and returns to step S210.
Wherein, the larger the temperature difference, the shorter the interval time and the longer the heating time.
By adopting the method for controlling the sterilization temperature, when the heating device is required to operate, the temperature difference between the target sterilization temperature and the temperature in the cavity is firstly determined so as to determine the degree of the temperature in the cavity from the target sterilization temperature. When the temperature difference is large, the temperature in the cavity is far away from the target sterilization temperature, the temperature rise time can be reduced by faster heating, and the overshoot problem can not occur. At this time, the interval time of heating is short, the heating time is long, and the heating speed is high. When the temperature difference is small, the temperature in the cavity is close to the target sterilization temperature, and the faster heating can cause the problem of overshoot. At this time, the heating interval time is long, the heating time is short, and the heating speed is slow. And under the condition that the time for closing the heating device is longer than or equal to the interval time, the excessive waste heat is partially dissipated, and the heating device is started for heating. In the case where the time for turning on the heating means is equal to the heating time, the heating amount is enough to increase the intra-cavity temperature and intra-cavity pressure of the current control process, and the heating means is turned off to stop heating. By controlling the operation of the heating device at different heating speeds under different temperatures in the cavity, the temperature rise time and overshoot are reduced, and meanwhile, the accuracy of controlling the temperature in the cavity of the steam sterilizer is improved.
Alternatively, for the processor in step S234 to determine the interval time and the heating time corresponding to the temperature difference value, the interval time and the heating time corresponding to the temperature difference value may be determined by a table look-up method. For example: when the temperature difference is greater than 1 ℃ and less than or equal to 1.5 ℃, the interval time is 2 seconds and the heating time is 4 seconds. When the temperature difference is greater than 0.5 ℃ and less than or equal to 1 ℃, the interval time is 7 seconds and the heating time is 3 seconds. When the temperature difference is greater than 0 ℃ and less than or equal to 0.5 ℃, the interval time is 9 seconds and the heating time is 2 seconds. In addition to the above-described table lookup method, the interval time and the heating time corresponding to the temperature difference may also be determined by a formula method. For example: the calculation formula of the interval time is as follows: t (T) i =α/Δt. The calculation formula of the heating time is as follows: t (T) h =β×_ Δt. Wherein T is i For interval time, T h For heating time, α is the first conversion coefficient, β is the second conversion coefficient, and Δt is the temperature difference. Alpha has the value range of [1,3 ]]. Preferably, α has a value of 1.5, 2 or 2.5. Beta has a value of [1.5,3.5 ]]. Preferably, β has a value of 2, 2.5 or 3. Therefore, when the interval time and the heating time are determined by the table lookup method, the corresponding parameters can be quickly called, and the control process is simple. When the interval time and the heating time are determined by a formula method, the heating time and the interval time which are uniquely corresponding to the temperature difference can be accurately calculated, and the accuracy of heating speed control is improved, so that the accuracy of temperature control in the cavity of the steam sterilizer is improved.
As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for sterilization temperature control, comprising:
s210, detecting the temperature in the cavity of the steam sterilizer by a temperature sensor.
S220, detecting the intra-cavity pressure of the steam sterilizer by the pressure sensor.
And S230, the processor controls the operation of the heating device according to the temperature in the cavity and the pressure in the cavity.
S240, the processor adjusts the reference pressure according to the intra-cavity temperature and intra-cavity pressure.
By adopting the method for sterilization temperature control provided by the embodiment of the disclosure, the comparison of the intra-cavity pressure and the reference pressure is needed besides the comparison of the intra-cavity temperature when the heating device is controlled to operate. Since the reference pressure to be reached by the intra-cavity pressure is different in different stages of sterilization temperature control, the reference pressure needs to be adjusted. The upper limit of the operating condition of the heating device is changed by adjusting the reference pressure, so that the temperature in the cavity is controlled by the pressure in the cavity, and the accuracy of the temperature control in the cavity of the steam sterilizer is improved.
As shown in connection with fig. 5, an embodiment of the present disclosure provides another method for sterilization temperature control, comprising:
s210, detecting the temperature in the cavity of the steam sterilizer by a temperature sensor.
S200, under the condition that the temperature in the cavity is smaller than the first set temperature, the processor turns on the heating device, and returns to the step S210.
S220, detecting the intra-cavity pressure of the steam sterilizer by the pressure sensor.
S201, in the case where the intra-cavity temperature is equal to the first set temperature, the processor determines the intra-cavity pressure as the reference pressure, and returns to step S210.
And S230, controlling the operation of the heating device by the processor according to the temperature and the pressure in the cavity under the condition that the temperature in the cavity is larger than the first set temperature.
S241, in the case where the intra-cavity temperature and intra-cavity pressure satisfy the third preset condition, the processor increases the reference pressure, and returns to step S210.
S242, in the case that the intra-cavity temperature and intra-cavity pressure satisfy the fourth preset condition, the processor maintains the reference pressure unchanged, and returns to step S210.
S243, in the case where the intra-cavity temperature satisfies the fifth preset condition, the processor lowers the reference pressure, and returns to step S210.
By adopting the method for controlling the sterilization temperature, provided by the embodiment of the disclosure, under the condition that the temperature in the cavity is smaller than the first set temperature, the steam sterilizer does not enter the sterilization mode yet, and the heating device is started to continuously heat up to enable the steam sterilizer to enter the sterilization mode. When the temperature in the cavity is equal to the first set temperature, the steam sterilizer starts to enter a sterilization mode, and the pressure in the cavity at the moment is taken as a reference pressure. In the case where the intra-cavity temperature and intra-cavity pressure satisfy the third preset condition, the intra-cavity temperature does not reach the target sterilization temperature, and the intra-cavity temperature needs to be raised by the heating device. At this time, since the reference pressure may limit the temperature rise of the heating device, it is necessary to raise the reference pressure, and the temperature in the chamber is prevented from being unable to rise. And under the condition that the temperature in the cavity and the pressure in the cavity meet the fourth preset condition, the temperature in the cavity approaches or reaches the target sterilization temperature, and the reference pressure is kept unchanged so as to limit the temperature in the cavity and reduce the overshoot of the residual temperature. And when the temperature in the cavity meets the fifth preset condition, the temperature in the cavity exceeds the target sterilization temperature, and the reference pressure is reduced to limit the temperature in the cavity to reduce overshoot. The reference pressure is adjusted and the heating limitation of the heating device is changed in different sterilization temperature control processes, so that the temperature in the cavity is controlled through the pressure in the cavity, and the accuracy of the temperature control in the cavity of the steam sterilizer is improved.
Optionally, the intra-cavity temperature and intra-cavity pressure in step S241 satisfy a third preset condition, including: the temperature in the cavity is larger than the first set temperature and smaller than or equal to the second set temperature; or the pressure in the cavity is smaller than the reference pressure when the temperature in the cavity is larger than the second set temperature and smaller than or equal to the fourth set temperature. The intra-cavity temperature and intra-cavity pressure in step S242 satisfy a fourth preset condition, including: the temperature in the cavity is larger than the fourth set temperature and smaller than or equal to the third set temperature; or the pressure in the cavity is greater than or equal to the reference pressure when the temperature in the cavity is greater than the second set temperature and less than or equal to the fourth set temperature. The intra-cavity temperature in step S243 satisfies a fifth preset condition, including: the temperature in the cavity is greater than the third set temperature. Thus, when the temperature in the cavity is greater than the first set temperature and less than or equal to the second set temperature, the sterilization temperature control process is in the initial stage of temperature control, and rapid temperature rise is required to be realized through the operation of the heating device so as to reduce the temperature rise time. At this time, since the temperature in the cavity is far from the target sterilization temperature, there is no problem of excessive temperature, and the pressure in the cavity does not need to be considered, so that the reference pressure is directly increased. When the temperature in the cavity is greater than the second set temperature and less than or equal to the fourth set temperature, the sterilization temperature control process is in a temperature control stable period, and the problem of overshoot may exist. Because the pressure adjustment range is wide and the response is quick, when the pressure in the cavity is smaller than the reference pressure, the reference pressure is increased, and the upper limit of the pressure in the cavity is gradually increased to increase the temperature in the cavity. When the temperature in the cavity is higher than the fourth set temperature and lower than or equal to the third set temperature, the reference pressure corresponds to the target sterilization temperature, and the overshoot of the temperature in the cavity is reduced without changing the reference pressure. When the temperature in the cavity is greater than the third set temperature, the temperature in the cavity exceeds the target sterilization temperature, and the reference pressure is set too high, so that the heating device is heated continuously. The upper limit of the pressure in the cavity is reduced by reducing the reference pressure, so that the upper limit of the temperature in the cavity is reduced, and the overshoot of the temperature in the cavity is reduced. The reference pressure is adjusted differently in different sterilization temperature control processes, so that the adjustment of the pressure in the cavity and the upper limit of the temperature in the cavity is realized, and the accuracy of the temperature control in the cavity of the steam sterilizer is improved.
Optionally, the fourth set temperature has a value in the range of [135, 135.2 ]. Preferably, the fourth set temperature takes a value of 135.1 ℃. Therefore, when the value of the fourth set temperature is in the range, the influence of the residual temperature of the heating device on the temperature in the cavity can be reduced, and the overshoot of the temperature in the cavity is reduced.
Optionally, the processor in step S241 increases the reference pressure, including: in the case where the time to raise the reference pressure the previous time is equal to the first set time, the processor determines a first adjustment coefficient of the reference pressure based on the temperature in the chamber. The processor determines a first adjustment of the reference pressure based on the intra-cavity pressure. The processor being based on a referenceThe first adjustment coefficient and the first adjustment amount of the pressure determine a first correction amount. The processor increases the reference pressure by a first correction amount. The calculation formula of the first correction amount is: deltaP 1 =ap+b. Wherein DeltaP 1 The first correction amount, a is a first adjustment coefficient, P is a reference pressure, and B is a first adjustment amount. The value of A decreases with the increase of the temperature in the cavity, and the value of B decreases with the increase of the pressure in the cavity. For example: when the temperature in the cavity is 134 ℃, A is 0.01. At an intracavity temperature of 134.5 ℃, a is 0.006. When the intra-cavity pressure is 208Kpa, B is 1. When the intra-cavity pressure was 210Kpa, B was 0.8. The first set time is determined according to the temperature in the cavity and increases with the temperature in the cavity. For example: when the temperature in the cavity is greater than the first set temperature and less than or equal to the second set temperature, the first set time is 5 seconds. When the temperature in the cavity is greater than the second set temperature and less than or equal to the fourth set temperature, the first set time is 20 seconds. Thus, when the intra-cavity temperature is low, the intra-cavity pressure is low, and a rapid rise in the reference pressure is required to reduce the restriction of the reference pressure to the intra-cavity pressure. At this time, the first correction amount of the reference pressure is large, and the reference pressure rise amount is large each time, and the intra-cavity pressure and the intra-cavity temperature rise speed are high. When the intra-cavity temperature is higher, the intra-cavity pressure is higher, and the rising reference pressure needs to be slowed down to reduce the intra-cavity temperature and the overshoot of the intra-cavity pressure. At this time, the first correction amount of the reference pressure is small, the reference pressure rise amount is small each time, and the intra-cavity pressure and intra-cavity temperature rise speed is slow. By changing the speed of reference pressure adjustment in different temperature control stages, the accuracy of temperature control in the cavity of the steam sterilizer is improved.
Optionally, the processor in step S243 reduces the reference pressure, including: in the case where the time to decrease the reference pressure the previous time is equal to the second set time, the processor determines a second adjustment coefficient of the reference pressure based on the temperature in the chamber. The processor determines a second adjustment of the reference pressure based on the intra-cavity pressure. The processor determines a second correction amount based on a second adjustment coefficient of the reference pressure and the second adjustment amount. The processor reduces the reference pressure by a second correction amount. The calculation formula of the second correction amount is: deltaP 2 =cp+d. Wherein DeltaP 2 The second correction amount is a second adjustment coefficient, C is a reference pressure, and D is a second adjustment amount. The value of C increases with the increase of the temperature in the cavity, and the value of D increases with the increase of the pressure in the cavity. For example: the C was 0.008 at an intracavity temperature of 135.8 ℃. When the temperature in the cavity is 136 ℃, C is 0.01. When the intra-cavity pressure is 220Kpa, D is 1. At 225Kpa intra-luminal pressure, D is 1.2. The value of the second setting time is a fixed value, for example, 5 seconds. Thus, when the intra-cavity temperature is high, the intra-cavity pressure is high, and the reference pressure needs to be quickly reduced to avoid that the intra-cavity temperature greatly exceeds the target sterilization temperature. At this time, the second correction amount of the reference pressure is large, the reference pressure is reduced by a large amount each time, and the intra-cavity pressure and the intra-cavity temperature are reduced at a high rate. By gradually reducing the reference pressure when the temperature in the cavity exceeds the target sterilization temperature so as to reduce the overshoot of the temperature in the cavity and the pressure in the cavity, the accuracy of the control of the temperature in the cavity of the steam sterilizer is improved.
Optionally, after the temperature sensor in step S210 detects the temperature in the cavity of the steam sterilizer, the method further includes: and under the condition that the temperature in the cavity is greater than the fifth set temperature, the processor gives an alarm and reminds. Therefore, when the temperature in the cavity is higher than the fifth set temperature, the object to be sterilized is damaged by steam, and an alarm is required to be given to avoid damaging the object to be sterilized.
The fifth set temperature is in the range of 136, 136.2 deg.c. Preferably, the fifth set temperature takes a value of 136.1 ℃. In this way, when the value of the fifth set temperature is within the above range, the object to be sterilized may be damaged, so as to give an alarm.
Exemplary descriptions of methods for sterilization temperature control provided by embodiments of the present disclosure are as follows:
when the steam sterilizer is needed for sterilization, the heating device is started. The temperature and pressure in the cavity of the steam sterilizer are detected in real time. When the temperature in the cavity reaches the first set temperature, the pressure in the cavity at the moment is recorded as the reference pressure. As the heating device operates, the temperature and pressure within the chamber increases. When the temperature in the cavity is between the first set temperature and the second set temperature, the heating device is closed every time the heating device is started to reach the heating time. And each time the heating device is turned off for an interval time, the heating device is turned on. The reference pressure is raised once every first set time. When the temperature in the cavity is between the second set temperature and the fourth set temperature, the heating device is controlled to operate and raise the reference pressure when the pressure in the cavity is smaller than the reference pressure, and the heating device is turned off and the reference pressure is kept unchanged when the pressure in the cavity is larger than or equal to the reference pressure. When the temperature in the cavity is between the fourth set temperature and the third set temperature, the heating device is controlled to operate when the pressure in the cavity is smaller than the reference pressure, and the heating device is closed when the pressure in the cavity is larger than or equal to the reference pressure. At this time, the reference pressure is kept unchanged. When the temperature in the cavity is between the third set temperature and the fifth set temperature, the heating device is turned off, and the reference pressure is reduced once every second set time passes. And when the temperature in the cavity is greater than the fifth set temperature, alarming and reminding are carried out.
As shown in connection with fig. 6, an embodiment of the present disclosure provides an apparatus for sterilization temperature control, including a processor (processor) 41 and a memory (memory) 42. Optionally, the apparatus may also include a communication interface (Communication Interface) 43 and a bus 44. The processor 41, the communication interface 43 and the memory 42 may communicate with each other via a bus 44. The communication interface 43 may be used for information transmission. Processor 41 may invoke logic instructions in memory 42 to perform the method for sterilization temperature control of the above-described embodiments.
Further, the logic instructions in the memory 42 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 42 serves as a storage medium for storing a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 41 executes the functional application and data processing by running the program instructions/modules stored in the memory 42, i.e. implements the method for sterilization temperature control in the above-described embodiments.
Memory 42 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 42 may include high-speed random access memory, and may also include non-volatile memory.
The embodiment of the disclosure provides a steam sterilizer, which comprises the device for controlling the sterilization temperature.
The disclosed embodiments provide a storage medium storing computer executable instructions configured to perform the above-described method for sterilization temperature control.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (6)
1. A method for sterilization temperature control, comprising:
detecting the temperature in the cavity of the steam sterilizer;
detecting the pressure in the cavity of the steam sterilizer;
controlling the operation of the heating device according to the temperature and the pressure in the cavity;
wherein, according to intracavity temperature and intracavity pressure, control heating device operation includes: under the condition that the temperature in the cavity and the pressure in the cavity meet the first preset condition, determining the heating speed of the heating device according to the temperature in the cavity; controlling the operation of the heating device according to the heating speed; closing the heating device under the condition that the temperature in the cavity and the pressure in the cavity meet second preset conditions;
the intracavity temperature and intracavity pressure satisfying a first preset condition comprising: the temperature in the cavity is larger than the first set temperature and smaller than or equal to the second set temperature; or, when the temperature in the cavity is greater than the second set temperature and less than or equal to the third set temperature, the pressure in the cavity is less than the reference pressure;
the intra-cavity temperature and intra-cavity pressure satisfy a second preset condition comprising: the temperature in the cavity is greater than a third set temperature; or the pressure in the cavity is larger than or equal to the reference pressure when the temperature in the cavity is larger than the second set temperature and smaller than or equal to the third set temperature;
after controlling the operation of the heating device according to the temperature in the cavity and the pressure in the cavity, the heating device further comprises: adjusting the reference pressure according to the temperature and the pressure in the cavity;
adjusting the reference pressure based on the intra-cavity temperature and intra-cavity pressure, comprising: increasing the reference pressure under the condition that the intra-cavity temperature and intra-cavity pressure meet a third preset condition; under the condition that the temperature in the cavity and the pressure in the cavity meet a fourth preset condition, keeping the reference pressure unchanged; and reducing the reference pressure in the case that the temperature in the cavity meets a fifth preset condition.
2. The method of claim 1, wherein determining a heating rate of the heating device based on the temperature within the cavity comprises:
determining a temperature difference between the target sterilization temperature and the temperature in the cavity;
determining an interval time and a heating time corresponding to the temperature difference value;
wherein, the larger the temperature difference value is, the shorter the interval time is, and the longer the heating time is; the heating rate is adjusted by varying the interval time and the heating time.
3. The method of claim 2, wherein controlling the operation of the heating device based on the heating rate comprises:
turning on the heating device when the time of turning off the heating device is greater than or equal to the interval time;
in case the time to turn on the heating means is equal to the heating time, the heating means is turned off.
4. An apparatus for sterilization temperature control comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for sterilization temperature control of any one of claims 1 to 3 when the program instructions are run.
5. A steam sterilizer comprising the apparatus for sterilization temperature control of claim 4.
6. A storage medium storing program instructions which, when executed, perform the method for sterilization temperature control of any one of claims 1 to 3.
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