CN113296554A - Pressure balance system for sterilizer - Google Patents
Pressure balance system for sterilizer Download PDFInfo
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- CN113296554A CN113296554A CN202110575494.6A CN202110575494A CN113296554A CN 113296554 A CN113296554 A CN 113296554A CN 202110575494 A CN202110575494 A CN 202110575494A CN 113296554 A CN113296554 A CN 113296554A
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- 230000001954 sterilising effect Effects 0.000 claims abstract description 130
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 128
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 8
- 108010066057 cabin-1 Proteins 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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Abstract
The invention relates to a pressure balance system used by a sterilizer, which relates to the technical field of sterilizers and comprises a sterilization cabin, which is used for containing a container to be sterilized, an ultrasonic emitter is arranged on one inner side wall of the sterilization cabin, the ultrasonic transmitter is used for detecting whether the container to be sterilized cracks in real time, the other inner side wall of the sterilization cabin is provided with a pressure sensor, a temperature sensor is arranged below the pressure sensor, an air inlet control valve is arranged on the air inlet pipe, the air inlet control valve is used for controlling the air inlet amount of the sterilization cabin, the exhaust pipe is provided with an exhaust control valve, the exhaust control valve is used for controlling the exhaust volume of the sterilization cabin, the inner wall of the sterilization cabin is provided with a cavity, the cavity is used for storing air, an opening is formed in the cavity, an electronic valve is arranged at the opening and used for controlling input and output of the air in the cavity. The system of the invention effectively improves the safety of the sterilizer in use.
Description
Technical Field
The invention relates to the technical field of sterilizers, in particular to a pressure balance system used by a sterilizer.
Background
The sterilizer is a device for quickly and reliably sterilizing articles by utilizing pressure saturated steam, and is suitable for sterilizing medical instruments, dressings, glassware, solution culture media and the like in medical health institutions, scientific research, agriculture and other units.
After the existing sterilizer enters a rapid cooling stage, the pressure in a sterilization cabin is rapidly reduced, so that the pressure difference between the inside and the outside of a sterilized article container is increased and exceeds the elastic range of the container, the conditions of container rupture, liquid bumping leakage and the like are caused, the sterilized article is lost, and simultaneously, the environment of the sterilization cabin is polluted, and a series of faults of the sterilizer are caused.
In the prior art, in order to balance the pressure in the sterilization chamber, air input and output are only carried out according to the air pressure and temperature in the sterilization chamber, and the air pressure in the sterilization chamber cannot be adjusted in time by combining the pressure degree of the container, so that the service life of the sterilizer is short and the safety is low.
Disclosure of Invention
Therefore, the invention provides a pressure balance system for a sterilizer, which is used for solving the problem of low safety of the sterilizer caused by the fact that the air pressure in a cabin cannot be timely adjusted according to the pressure degree of a container to be sterilized in the prior art.
To achieve the above object, the present invention provides a pressure equalization system for use in a sterilizer, comprising:
the sterilization chamber is used for containing a container to be sterilized, an ultrasonic transmitter is arranged on one inner side wall of the sterilization chamber and used for detecting whether the container to be sterilized cracks or not in real time, a pressure sensor is arranged on the other inner side wall of the sterilization chamber and used for detecting the air pressure in the sterilization chamber in real time, and a temperature sensor is arranged below the pressure sensor and used for detecting the temperature in the sterilization chamber in real time;
the bottom of the sterilization cabin is provided with a movable base, the movable base is used for changing the air pressure in the sterilization cabin, the lower surface of the movable base is connected with a hydraulic cylinder, and the hydraulic cylinder is used for driving the movable base to move up and down along the inner wall of the sterilization cabin;
the inner wall of the sterilization cabin is provided with a cavity for storing air, the cavity is provided with an opening, the opening is provided with an electronic valve, and the electronic valve is used for controlling the input and output of the air in the cavity;
an air inlet control valve for controlling the air inlet amount of the sterilization chamber;
an exhaust control valve for controlling an exhaust amount of the sterilization chamber;
the exhaust control valve, the air inlet control valve, the ultrasonic transmitter, the pressure sensor, the temperature sensor, the hydraulic cylinder and the electronic valve are all connected with the controller;
when the sterilization cabin cools a container to be sterilized, the controller adjusts the air pressure in the sterilization cabin according to the standard air pressure difference delta Pt obtained by calculation;
when the controller controls the moving distance of the hydraulic cylinder, the controller selects the corresponding moving distance of the hydraulic cylinder according to the standard air pressure difference delta Pt obtained by calculation;
when the controller controls the exhaust control valve or the intake control valve to be opened, selecting the opening frequency of the corresponding exhaust control valve or the intake control valve according to the calculated standard air pressure difference delta Pt;
when cracks are generated on the inner wall of the container to be sterilized, the controller selects the emergency opening frequency of the air inlet control valve according to the crack quantity A, after the emergency opening frequency of the air inlet control valve is selected, the controller adjusts the selected emergency opening frequency according to the average length of the cracks, and after the adjustment is completed, the controller corrects the adjusted emergency opening frequency according to the average width of the cracks;
when the controller controls the exhaust control valve or the air inlet control valve to be opened, the controller controls the opening time of each control valve according to the acquired temperature T in the sterilization chamber.
Further, when the container to be sterilized in the sterilization chamber is cooled, the controller is provided with a standard air pressure difference delta Pt, the controller compares the standard air pressure difference delta Pt obtained by calculation with each preset standard air pressure difference, and adjusts the air pressure in the sterilization chamber according to the comparison result, wherein,
when the delta Pt is not less than delta Pt1 and less than delta Pt2, the controller controls the electronic valve to be opened;
when the delta Pt is not less than delta Pt2 and less than delta Pt3, the controller controls the electronic valve to be opened and controls the hydraulic cylinder to move up and down;
when the delta Pt3 is less than or equal to the delta Pt, the controller controls the hydraulic cylinder to move up and down and controls the exhaust control valve or the intake control valve to be opened;
wherein, delta Pt1 is a first preset standard air pressure difference, delta Pt2 is a second preset standard air pressure difference, delta Pt3 is a third preset standard air pressure difference, and delta Pt1 is smaller than delta Pt2 and smaller than delta Pt 3.
Further, when the controller controls the hydraulic cylinder to move up and down, a pneumatic pressure analysis difference Pc is set in the controller, wherein Pc is set to P-Pt,
when the air pressure analysis difference Pc is a negative value, the controller controls the hydraulic cylinder to move upwards;
when the air pressure analysis difference Pc is a positive value, the controller controls the hydraulic cylinder to move downwards.
Further, when the controller controls the moving distance of the hydraulic cylinder, the controller compares the standard air pressure difference Δ Pt obtained by calculation with each preset moving air pressure difference, and selects the corresponding moving distance of the hydraulic cylinder according to the comparison result, wherein,
when Δ Pt < Δp1, the controller sets k1 as the hydraulic cylinder movement distance;
when the delta P1 is more than or equal to the delta Pt and less than the delta P2, the controller takes k2 as the moving distance of the hydraulic cylinder;
when the delta P2 is more than or equal to the delta Pt and less than the delta P3, the controller takes k3 as the moving distance of the hydraulic cylinder;
wherein, delta P1 is a first preset moving air pressure difference, delta P2 is a second preset moving air pressure difference, delta P3 is a third preset moving air pressure difference, and delta P2 is more than or equal to delta P1 and less than delta P2 and less than delta P3; k1 is the moving distance of the first preset hydraulic cylinder, k2 is the moving distance of the second preset hydraulic cylinder, k3 is the moving distance of the third preset hydraulic cylinder, and k1 is more than k2 and more than k 3.
Further, when the controller is controlling the opening of the exhaust control valve or the intake control valve, the controller controls the opening of the exhaust control valve or the intake control valve in accordance with the magnitude of the gas pressure analysis difference Pc, wherein,
when the air pressure analysis difference Pc is a negative value, the controller controls the air inlet control valve to be opened at a preset frequency;
when the air pressure analysis difference Pc is a positive value, the controller controls the exhaust control valve to open at a preset frequency;
when the controller selects the opening frequency of the air inlet control valve or the air exhaust control valve, the controller compares the standard air pressure difference Delta Pt obtained by calculation with each preset valve opening air pressure difference and selects the corresponding opening frequency according to the comparison result, wherein,
when delta Pa1 is not more than delta Pt and is less than delta Pa1, the controller takes f1 as the opening frequency;
when delta Pa2 is not more than delta Pt and is less than delta Pa3, the controller takes f2 as the opening frequency;
when the delta Pa3 is less than or equal to the delta Pt, the controller takes f3 as the opening frequency;
wherein, delta Pa1 is a first preset valve opening air pressure difference, delta Pa2 is a second preset valve opening air pressure difference, delta Pa3 is a third preset valve opening air pressure difference, and delta Pa1 is more than delta Pa2 and more than delta Pa3 and is more than or equal to delta Pt 3; f1 is a first preset turn-on frequency, f2 is a second preset turn-on frequency, f3 is a third preset turn-on frequency, and f1 is greater than f2 is greater than f 3.
Further, when the sterilization cabin cools the container to be sterilized, the controller adjusts the air pressure in the sterilization cabin in time according to the crack generation condition of the container to be sterilized, wherein,
when the inner wall of the container to be sterilized has cracks, the controller controls the air inlet control valve to be opened and stops the sterilization work;
when the outer wall of the container to be sterilized cracks, the controller controls the exhaust control valve to open and stops the sterilization work.
Further, when the inner wall of the container to be sterilized has cracks, the controller compares the number A of the cracks with the number of the preset cracks, and selects the emergency opening frequency of the air inlet control valve according to the comparison result, wherein,
when A1 is less than or equal to A < A2, the controller controls the air inlet control valve to be opened at a frequency H1;
when A2 is less than or equal to A < A3, the controller controls the air inlet control valve to be opened at a frequency H2;
when A3 is less than or equal to A, the controller controls the air inlet control valve to be opened at a frequency H3;
wherein A1 is a first preset crack number, A2 is a second preset crack number, A3 is a third preset crack number, A1 is more than A2 and is more than A3; h1 is a first preset emergency opening frequency, H2 is a second preset emergency opening frequency, H3 is a third preset emergency opening frequency, and H1 is more than H2 and more than H3.
Further, after the controller selects the emergency opening frequency of the air inlet control valve, the controller compares the average crack length D detected by the ultrasonic transmitter with the average crack length preset, selects a corresponding emergency opening frequency adjusting coefficient according to the comparison result, and adjusts the selected ith preset emergency opening frequency Hi, and sets i to 1,2 and 3,
when the controller selects a j-th preset emergency opening frequency adjusting coefficient mj to adjust Hi, setting j to be 1,2 and 3, setting Hi' to be Hi multiplied by mj after the adjustment, wherein,
when D1 is not less than D < D2, the controller selects m1 to adjust Hi;
when D2 is not less than D < D3, the controller selects m2 to adjust Hi;
when D3 is not more than D, the controller selects m3 to adjust Hi;
wherein D1 is a first preset average crack length, D2 is a second preset average crack length, D3 is a third preset average crack length, and D1 is more than D2 and more than D3; m1 is a first preset emergency opening frequency adjusting coefficient, m2 is a second preset emergency opening frequency adjusting coefficient, m3 is a third preset emergency opening frequency adjusting coefficient, and m1 is more than 1 and more than m2 and more than m3 is less than 2.
Further, after the adjustment of the emergency opening frequency of the air inlet control valve is completed, the controller compares the average crack width B detected by the ultrasonic transmitter with each preset average crack width, and selects a corresponding emergency opening frequency correction coefficient according to the comparison result to correct the adjusted emergency opening frequency Hi', wherein,
when the controller selects the j-th preset emergency opening frequency correction coefficient nj to correct Hi ', setting j to be 1,2 and 3, setting the corrected emergency opening frequency to be Hi ', and setting Hi to be Hi ' × nj, wherein,
when B1 is not less than B and is less than B2, the controller selects n1 to correct Hi';
when B2 is not less than B and is less than B3, the controller selects n2 to correct Hi';
when B3 is not more than B, the controller selects n3 to correct Hi';
wherein B1 is the first preset average crack width, B2 is the second preset average crack width, B3 is the third preset average crack width, B1 is more than B2 and more than B3; n1 is a first preset emergency opening frequency correction coefficient, n2 is a second preset emergency opening frequency correction coefficient, n3 is a third preset emergency opening frequency correction coefficient, and n1 is more than 1 and more than n2 and more than n3 and less than 2.
Further, when the controller controls the exhaust control valve or the intake control valve to be opened, the controller compares the acquired temperature T in the sterilization chamber with the temperature of each preset sterilization chamber and selects the corresponding opening time of the control valve according to the comparison result, wherein,
when T < T1, the controller sets the control valve opening time to T1;
when T1 is less than or equal to T < T2, the controller sets the opening time of the control valve to T2;
when T2 is less than or equal to T < T3, the controller sets the opening time of the control valve to T3;
wherein T1 is a first preset sterilization cabin temperature, T2 is a second preset sterilization cabin temperature, T3 is a third preset sterilization cabin temperature, and T1 is more than T2 and more than T3; t1 is the first preset control valve opening time, t2 is the second preset control valve opening time, t3 is the third preset control valve opening time, and t1 < t2 < t 3.
Compared with the prior art, the system has the advantages that the system can detect whether the container to be sterilized has cracks in real time by arranging the ultrasonic transmitter, so that the use safety of the sterilizer is effectively improved, the air pressure balance in the sterilization cabin can be regulated and controlled in real time by arranging the movable base, the air pressure balance in the sterilization cabin can be further regulated and controlled by matching with the flow of air stored in the cavity, the use safety of the sterilizer is further improved, meanwhile, the controller also controls the opening frequency of the air inlet control valve and the air outlet control valve according to the air pressure P detected in real time, the input quantity and the output quantity of the air in the sterilization cabin can be accurately controlled by controlling the opening frequency, so that the pressure in the sterilization cabin is balanced, the use safety of the sterilizer is further improved, and the controller accurately controls the input and the output of the air in the sterilization cabin according to the crack generation position of the container to be sterilized, the controller sets the emergency opening frequency of the control valve, selects the emergency opening frequency according to the number of generated cracks, can effectively ensure the pressure balance in the sterilization chamber, adjusts and corrects the emergency opening frequency according to the average length and the average width of the cracks, further ensures the accuracy of the emergency opening frequency, further improves the safety of the sterilizer in use, sets the opening time of the control valve according to the temperature detected in the sterilization chamber, further improves the accuracy of the air input quantity and the air output quantity in the sterilization chamber, further achieves the pressure balance in the sterilization chamber, and further improves the safety of the sterilizer in use.
Particularly, the controller compares the standard air pressure difference delta Pt obtained by calculation with each preset standard air pressure difference, and adjusts the air pressure in the sterilization cabin according to the comparison result, so that the pressure balance in the sterilization cabin can be further ensured, and the use safety of the sterilizer is further improved.
Particularly, the controller compares the standard air pressure difference delta Pt obtained by calculation with each preset moving air pressure difference to select the corresponding moving distance of the hydraulic cylinder, so that the accuracy of the ascending or descending height of the base can be effectively guaranteed, the pressure balance in the sterilization cabin is further guaranteed, and the use safety of the sterilizer is further improved.
Particularly, the controller compares the standard air pressure difference delta Pt obtained by calculation with each preset valve opening air pressure difference to select corresponding opening frequency, so that the accuracy of air inflow or air discharge in the sterilization chamber can be effectively guaranteed, the pressure balance in the sterilization chamber is further guaranteed, and the use safety of the sterilizer is further improved.
Particularly, the controller controls the input and output of the air in the sterilization cabin according to the crack position of the container to be sterilized detected by the ultrasonic transmitter, so that the pressure balance in the sterilization cabin can be further ensured, and the use safety of the sterilizer is further improved.
Particularly, the controller selects the emergency opening frequency of the air inlet control valve by comparing the crack number A with each preset crack number, so that the accuracy of the air inlet amount of the air inlet control valve during emergency opening can be effectively ensured, the pressure balance in the sterilization cabin is further ensured, and the use safety of the sterilizer is further improved.
Particularly, the controller compares the average crack length D detected by the ultrasonic transmitter with the average crack length preset by the ultrasonic transmitter, selects the corresponding emergency opening frequency adjusting coefficient to adjust the selected emergency opening frequency Hi, and can further ensure the accuracy of air inflow when the air inlet control valve is opened emergently, so that the pressure balance in the sterilization chamber is further ensured, and the use safety of the sterilizer is further improved.
Particularly, the controller compares the average crack width B detected by the ultrasonic transmitter with the average crack width of each preset crack to select a corresponding emergency opening frequency correction coefficient to correct the adjusted emergency opening frequency Hi', so that the accuracy of air inflow when the air inlet control valve is opened emergently is further ensured, the pressure balance in the sterilization cabin is further ensured, and the use safety of the sterilizer is further improved.
Particularly, the controller compares the acquired temperature T in the sterilization chamber with the temperature of each preset sterilization chamber to select the corresponding opening time of the control valve, so that the accuracy of the input quantity or the output quantity of the air in the sterilization chamber can be further ensured, the pressure balance in the sterilization chamber is further ensured, and the use safety of the sterilizer is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a pressure equalization system used in the sterilizer of the present embodiment;
fig. 2 is a schematic structural diagram of another embodiment based on fig. 1.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a pressure balancing system for a sterilizer according to the present embodiment includes:
the sterilization chamber comprises a sterilization chamber 1 for containing a container to be sterilized, a chamber cover 2 is arranged above the sterilization chamber 1, an inner side wall of the sterilization chamber 1 is provided with an ultrasonic emitter 9, the ultrasonic emitter 9 is used for detecting whether the container to be sterilized cracks or not in real time, the other inner side wall of the sterilization chamber 1 is provided with a pressure sensor 10, the pressure sensor 10 is used for detecting the air pressure in the sterilization chamber 1 in real time, a temperature sensor 11 is arranged below the pressure sensor 10, the temperature sensor 11 is used for detecting the temperature in the sterilization chamber 1 in real time, an air inlet pipe 4 is connected to the upper end of one inner side wall of the sterilization chamber 1, the air inlet pipe 4 is used for conveying air into the sterilization chamber 1, an air inlet control valve 6 is arranged on the air inlet pipe 4, and the air inlet control valve 6 is used for controlling the air inflow of the sterilization chamber 1, the end, far away from the sterilization cabin 1, of the air inlet control valve 6 is connected with an air filter 7 through the air inlet pipe 4, the end, far away from the air inlet control valve 6, of the air filter 7 is connected with an air compressor 8 through the air inlet pipe 4, the air filter 7 is used for filtering air output by the air compressor 8, the air compressor 8 is used for outputting air to the air inlet pipe 4, the upper end of the other inner side wall of the sterilization cabin 1 is connected with an exhaust pipe 3, the exhaust pipe 3 is used for exhausting air in the sterilization cabin 1, the exhaust pipe 3 is provided with an exhaust control valve 5, the exhaust control valve 5 is used for controlling the exhaust amount of the sterilization cabin 1, the exhaust control valve 5 and the air inlet control valve 6 are both solenoid valves, the bottom of the sterilization cabin 1 is provided with a movable base 12, and the movable base 12 is attached to the inner wall of the sterilization cabin 1, the movable base 12 is used for changing the air pressure in the sterilization cabin 1, the lower surface of the movable base 12 is connected with a hydraulic cylinder 13, the hydraulic cylinder 13 is used for driving the movable base 12 to move up and down along the inner wall of the sterilization chamber 1, the inner wall of the sterilization chamber 1 is provided with a cavity 14, the cavity 14 is used for storing air, the cavity 14 is provided with an opening, an electronic valve 15 is arranged at the opening, the electronic valve 15 is used for controlling the input and output of air in the cavity 14, the exhaust control valve 5, the intake control valve 6, the air filter 7, the air compressor 8, the ultrasonic transmitter 9, the pressure sensor 10, the temperature sensor 11, and the hydraulic cylinder 13 and the electronic valve 15 are all connected to a controller (not shown), and the connection mode may be wireless connection or wired connection, and the wired connection includes, but is not limited to, electrical connection.
Please refer to fig. 2, which is a schematic structural diagram of another embodiment based on fig. 1 of the present embodiment, including that an air inlet pressure reducing valve 18 is further disposed on the air inlet pipe 4, the air inlet pressure reducing valve 18 is used to control the maximum pressure entering the sterilization chamber 1, the air outlet pipe 3 is further provided with an air outlet filter 17, the air outlet filter 17 is used to filter the air exhausted from the sterilization chamber 1, a safety valve 19 is further disposed on a side wall of the sterilization chamber 1, the safety valve 19 is used to manually control the sterilization operation, another side wall of the sterilization chamber 1 is further provided with an ultrasonic receiver 16, and the ultrasonic receiver 16 can be set according to the requirement of the ultrasonic transmitter 9.
It is understood that the present invention does not specifically limit the position of the ultrasonic transmitter 9 to meet the container crack detection requirement, the present invention does not specifically limit the positions of the pressure sensor 10 and the temperature sensor 11 to meet the detection of the temperature and the pressure in the sterilization chamber, and the present invention does not specifically limit the opening position of the cavity 14 to meet the air circulation requirement.
Specifically, when a container to be sterilized in the sterilization chamber is cooled, a standard air pressure difference Δ Pt is set in the controller, the Δ Pt is set to be | P-Pt |, P is the air pressure detected by the pressure sensor, Pt is a preset air pressure standard value, the controller compares the calculated standard air pressure difference Δ Pt with each preset standard air pressure difference, and adjusts the air pressure in the sterilization chamber according to the comparison result, wherein,
when the delta Pt is not less than delta Pt1 and less than delta Pt2, the controller controls the electronic valve to be opened;
when the delta Pt is not less than delta Pt2 and less than delta Pt3, the controller controls the electronic valve to be opened and controls the hydraulic cylinder to move up and down;
when the delta Pt3 is less than or equal to the delta Pt, the controller controls the hydraulic cylinder to move up and down and controls the exhaust control valve or the intake control valve to be opened;
wherein, delta Pt1 is a first preset standard air pressure difference, delta Pt2 is a second preset standard air pressure difference, delta Pt3 is a third preset standard air pressure difference, and delta Pt1 is smaller than delta Pt2 and smaller than delta Pt 3.
Specifically, the controller of this embodiment compares the calculated standard air pressure difference Δ Pt with each preset standard air pressure difference, and adjusts the air pressure in the sterilization chamber according to the comparison result, so as to further ensure the pressure balance in the sterilization chamber and further improve the safety of the sterilizer during use.
Specifically, when the controller controls the hydraulic cylinder to move up and down, a pneumatic pressure analysis difference Pc is provided in the controller, and Pc is set to P-Pt,
when the air pressure analysis difference Pc is a negative value, the controller controls the hydraulic cylinder to move upwards;
when the air pressure analysis difference Pc is a positive value, the controller controls the hydraulic cylinder to move downwards.
Specifically, when the controller controls the moving distance of the hydraulic cylinder, the controller compares the standard air pressure difference Δ Pt obtained by calculation with each preset moving air pressure difference, and selects the corresponding moving distance of the hydraulic cylinder according to the comparison result, wherein,
when Δ Pt < Δp1, the controller sets k1 as the hydraulic cylinder movement distance;
when the delta P1 is more than or equal to the delta Pt and less than the delta P2, the controller takes k2 as the moving distance of the hydraulic cylinder;
when the delta P2 is more than or equal to the delta Pt and less than the delta P3, the controller takes k3 as the moving distance of the hydraulic cylinder;
wherein, delta P1 is a first preset moving air pressure difference, delta P2 is a second preset moving air pressure difference, delta P3 is a third preset moving air pressure difference, and delta P2 is more than or equal to delta P1 and less than delta P2 and less than delta P3; k1 is the moving distance of the first preset hydraulic cylinder, k2 is the moving distance of the second preset hydraulic cylinder, k3 is the moving distance of the third preset hydraulic cylinder, and k1 is more than k2 and more than k 3.
Specifically, when the controller controls the opening of the exhaust control valve or the intake control valve, the controller controls the opening of the exhaust control valve or the intake control valve in accordance with the magnitude of the gas pressure analysis difference Pc, wherein,
when the air pressure analysis difference Pc is a negative value, the controller controls the air inlet control valve to be opened at a preset frequency;
when the air pressure analysis difference Pc is a positive value, the controller controls the exhaust control valve to open at a preset frequency.
Specifically, when the controller selects the opening frequency of the intake control valve or the exhaust control valve, the controller compares the calculated standard air pressure difference Δ Pt with each preset valve opening air pressure difference, and selects the corresponding opening frequency according to the comparison result, wherein,
when delta Pa1 is not more than delta Pt and is less than delta Pa1, the controller takes f1 as the opening frequency;
when delta Pa2 is not more than delta Pt and is less than delta Pa3, the controller takes f2 as the opening frequency;
when the delta Pa3 is less than or equal to the delta Pt, the controller takes f3 as the opening frequency;
wherein, delta Pa1 is a first preset valve opening air pressure difference, delta Pa2 is a second preset valve opening air pressure difference, delta Pa3 is a third preset valve opening air pressure difference, and delta Pa1 is more than delta Pa2 and more than delta Pa3 and is more than or equal to delta Pt 3; f1 is a first preset turn-on frequency, f2 is a second preset turn-on frequency, f3 is a third preset turn-on frequency, and f1 is greater than f2 is greater than f 3.
Specifically, in the embodiment, the controller selects the opening frequency of the exhaust control valve or the intake control valve by comparing the standard air pressure difference Δ Pt obtained by calculation with each preset valve opening air pressure difference, so that the accuracy of the exhaust amount can be effectively ensured, the pressure balance in the sterilization chamber can be further ensured, and the use safety of the sterilizer can be further improved.
Specifically, when the container to be sterilized is cooled by the sterilization chamber, the controller adjusts the air pressure in the sterilization chamber in time according to the crack generation condition of the container to be sterilized, wherein,
when the inner wall of the container to be sterilized has cracks, the controller controls the air inlet control valve to be opened and stops the sterilization work;
when the outer wall of the container to be sterilized cracks, the controller controls the exhaust control valve to open and stops the sterilization work.
Specifically, when cracks are generated on the inner wall of the container to be sterilized, the controller compares the number A of the cracks with the number of the preset cracks, and selects the emergency opening frequency of the air inlet control valve according to the comparison result, wherein,
when A1 is less than or equal to A < A2, the controller controls the air inlet control valve to be opened at a frequency H1;
when A2 is less than or equal to A < A3, the controller controls the air inlet control valve to be opened at a frequency H2;
when A3 is less than or equal to A, the controller controls the air inlet control valve to be opened at a frequency H3;
wherein A1 is a first preset crack number, A2 is a second preset crack number, A3 is a third preset crack number, A1 is more than A2 and is more than A3; h1 is a first preset emergency opening frequency, H2 is a second preset emergency opening frequency, H3 is a third preset emergency opening frequency, and H1 is more than H2 and more than H3.
Specifically, after the controller selects the emergency opening frequency of the air inlet control valve, the controller adjusts the selected emergency opening frequency according to the average crack length, compares the average crack length D detected by the ultrasonic transmitter with each preset average crack length, selects a corresponding emergency opening frequency adjustment coefficient according to the comparison result, and adjusts the selected ith preset emergency opening frequency Hi, where i is set to 1,2, and 3,
when the controller selects a j-th preset emergency opening frequency adjusting coefficient mj to adjust Hi, setting j to be 1,2 and 3, setting Hi' to be Hi multiplied by mj after the adjustment, wherein,
when D1 is not less than D < D2, the controller selects m1 to adjust Hi;
when D2 is not less than D < D3, the controller selects m2 to adjust Hi;
when D3 is not more than D, the controller selects m3 to adjust Hi;
wherein D1 is a first preset average crack length, D2 is a second preset average crack length, D3 is a third preset average crack length, and D1 is more than D2 and more than D3; m1 is a first preset emergency opening frequency adjusting coefficient, m2 is a second preset emergency opening frequency adjusting coefficient, m3 is a third preset emergency opening frequency adjusting coefficient, and m1 is more than 1 and more than m2 and more than m3 is less than 2.
Specifically, in this embodiment, the controller compares the average crack length D detected by the ultrasonic transmitter with the average crack length preset to select the corresponding emergency opening frequency adjustment coefficient to adjust the selected emergency opening frequency Hi, so as to further ensure the accuracy of the air intake amount when the air intake control valve is opened emergently, further ensure the pressure balance in the sterilization chamber, and further improve the safety of the sterilizer in use.
Specifically, after the adjustment of the emergency opening frequency of the air intake control valve is completed, the controller corrects the adjusted emergency opening frequency according to the average width of the cracks, compares the average width B of the cracks detected by the ultrasonic transmitter with each preset average width of the cracks, and selects a corresponding emergency opening frequency correction coefficient according to the comparison result to correct the adjusted emergency opening frequency Hi', wherein,
when the controller selects the j-th preset emergency opening frequency correction coefficient nj to correct Hi ', setting j to be 1,2 and 3, setting the corrected emergency opening frequency to be Hi ', and setting Hi to be Hi ' × nj, wherein,
when B1 is not less than B and is less than B2, the controller selects n1 to correct Hi';
when B2 is not less than B and is less than B3, the controller selects n2 to correct Hi';
when B3 is not more than B, the controller selects n3 to correct Hi';
wherein B1 is the first preset average crack width, B2 is the second preset average crack width, B3 is the third preset average crack width, B1 is more than B2 and more than B3; n1 is a first preset emergency opening frequency correction coefficient, n2 is a second preset emergency opening frequency correction coefficient, n3 is a third preset emergency opening frequency correction coefficient, and n1 is more than 1 and more than n2 and more than n3 and less than 2.
Specifically, when the outer wall of the container to be sterilized has cracks, the controller compares the number A of the cracks with the number of the preset cracks, and the emergency opening frequency of the exhaust control valve is selected according to the comparison result, after the controller selects the emergency opening frequency of the exhaust control valve, the controller compares the average crack length D detected by the ultrasonic transmitter with the average crack length preset by the ultrasonic transmitter, and selects the corresponding emergency opening frequency adjusting coefficient according to the comparison result to adjust the selected ith preset emergency opening frequency Hi, the controller compares the average crack width B detected by the ultrasonic transmitter with the average crack width of each preset crack, and selecting a corresponding emergency opening frequency correction coefficient according to the comparison result to correct the adjusted emergency opening frequency Hi'.
Specifically, when the controller controls the exhaust control valve or the intake control valve to be opened, the controller compares the acquired temperature T in the sterilization chamber with the temperature of each preset sterilization chamber, and selects the corresponding opening time of the control valve according to the comparison result, wherein,
when T < T1, the controller sets the control valve opening time to T1;
when T1 is less than or equal to T < T2, the controller sets the opening time of the control valve to T2;
when T2 is less than or equal to T < T3, the controller sets the opening time of the control valve to T3;
wherein T1 is a first preset sterilization cabin temperature, T2 is a second preset sterilization cabin temperature, T3 is a third preset sterilization cabin temperature, and T1 is more than T2 and more than T3; t1 is the first preset control valve opening time, t2 is the second preset control valve opening time, t3 is the third preset control valve opening time, and t1 < t2 < t 3.
Specifically, in the embodiment, the controller compares the obtained temperature T in the sterilization chamber with the temperatures of the preset sterilization chambers to select the corresponding opening time of the control valve, so that the accuracy of the input amount or the output amount of air in the sterilization chamber can be further ensured, the pressure balance in the sterilization chamber can be further ensured, and the use safety of the sterilizer can be further improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A pressure equalization system for use with a sterilizer, comprising:
the sterilization chamber is used for containing a container to be sterilized, an ultrasonic transmitter is arranged on one inner side wall of the sterilization chamber and used for detecting whether the container to be sterilized cracks or not in real time, a pressure sensor is arranged on the other inner side wall of the sterilization chamber and used for detecting the air pressure in the sterilization chamber in real time, and a temperature sensor is arranged below the pressure sensor and used for detecting the temperature in the sterilization chamber in real time;
the bottom of the sterilization cabin is provided with a movable base, the movable base is used for changing the air pressure in the sterilization cabin, the lower surface of the movable base is connected with a hydraulic cylinder, and the hydraulic cylinder is used for driving the movable base to move up and down along the inner wall of the sterilization cabin;
the inner wall of the sterilization cabin is provided with a cavity for storing air, the cavity is provided with an opening, the opening is provided with an electronic valve, and the electronic valve is used for controlling the input and output of the air in the cavity;
an air inlet control valve for controlling the air inlet amount of the sterilization chamber;
an exhaust control valve for controlling an exhaust amount of the sterilization chamber;
the exhaust control valve, the air inlet control valve, the ultrasonic transmitter, the pressure sensor, the temperature sensor, the hydraulic cylinder and the electronic valve are all connected with the controller;
when the sterilization cabin cools a container to be sterilized, the controller adjusts the air pressure in the sterilization cabin according to the standard air pressure difference delta Pt obtained by calculation;
when the controller controls the moving distance of the hydraulic cylinder, the controller selects the corresponding moving distance of the hydraulic cylinder according to the standard air pressure difference delta Pt obtained by calculation;
when the controller controls the exhaust control valve or the intake control valve to be opened, selecting the opening frequency of the corresponding exhaust control valve or the intake control valve according to the calculated standard air pressure difference delta Pt;
when cracks are generated on the inner wall of the container to be sterilized, the controller selects the emergency opening frequency of the air inlet control valve according to the crack quantity A, after the emergency opening frequency of the air inlet control valve is selected, the controller adjusts the selected emergency opening frequency according to the average length of the cracks, and after the adjustment is completed, the controller corrects the adjusted emergency opening frequency according to the average width of the cracks;
when the controller controls the exhaust control valve or the air inlet control valve to be opened, the controller controls the opening time of each control valve according to the acquired temperature T in the sterilization chamber.
2. The pressure balancing system for sterilizers according to claim 1, wherein a standard air pressure difference Δ Pt is provided in the controller when cooling the containers to be sterilized in the sterilization chamber, the controller compares the calculated standard air pressure difference Δ Pt with each of the preset standard air pressure differences and adjusts the air pressure in the sterilization chamber according to the comparison result, wherein,
when the delta Pt is not less than delta Pt1 and less than delta Pt2, the controller controls the electronic valve to be opened;
when the delta Pt is not less than delta Pt2 and less than delta Pt3, the controller controls the electronic valve to be opened and controls the hydraulic cylinder to move up and down;
when the delta Pt3 is less than or equal to the delta Pt, the controller controls the hydraulic cylinder to move up and down and controls the exhaust control valve or the intake control valve to be opened;
wherein, delta Pt1 is a first preset standard air pressure difference, delta Pt2 is a second preset standard air pressure difference, delta Pt3 is a third preset standard air pressure difference, and delta Pt1 is smaller than delta Pt2 and smaller than delta Pt 3.
3. The pressure balancing system for sterilizers according to claim 2, wherein the controller sets a gas pressure analysis difference Pc, set Pc-Pt, in the controller when controlling the hydraulic cylinder to move up and down, wherein,
when the air pressure analysis difference Pc is a negative value, the controller controls the hydraulic cylinder to move upwards;
when the air pressure analysis difference Pc is a positive value, the controller controls the hydraulic cylinder to move downwards.
4. The pressure balancing system for sterilizers according to claim 3, wherein the controller compares the standard air pressure difference Δ Pt calculated by the controller with each preset moving air pressure difference when controlling the moving distance of the hydraulic cylinder, and selects the corresponding moving distance of the hydraulic cylinder according to the comparison result, wherein,
when Δ Pt < Δp1, the controller sets k1 as the hydraulic cylinder movement distance;
when the delta P1 is more than or equal to the delta Pt and less than the delta P2, the controller takes k2 as the moving distance of the hydraulic cylinder;
when the delta P2 is more than or equal to the delta Pt and less than the delta P3, the controller takes k3 as the moving distance of the hydraulic cylinder;
wherein, delta P1 is a first preset moving air pressure difference, delta P2 is a second preset moving air pressure difference, delta P3 is a third preset moving air pressure difference, and delta P2 is more than or equal to delta P1 and less than delta P2 and less than delta P3; k1 is the moving distance of the first preset hydraulic cylinder, k2 is the moving distance of the second preset hydraulic cylinder, k3 is the moving distance of the third preset hydraulic cylinder, and k1 is more than k2 and more than k 3.
5. The pressure equalization system for use in a sterilizer of claim 4, wherein when said controller is controlling the opening of said exhaust control valve or said intake control valve, said controller controls the opening of said exhaust control valve or said intake control valve according to the magnitude of the gas pressure analysis difference Pc, wherein,
when the air pressure analysis difference Pc is a negative value, the controller controls the air inlet control valve to be opened at a preset frequency;
when the air pressure analysis difference Pc is a positive value, the controller controls the exhaust control valve to open at a preset frequency;
when the controller selects the opening frequency of the air inlet control valve or the air exhaust control valve, the controller compares the standard air pressure difference Delta Pt obtained by calculation with each preset valve opening air pressure difference and selects the corresponding opening frequency according to the comparison result, wherein,
when delta Pa1 is not more than delta Pt and is less than delta Pa1, the controller takes f1 as the opening frequency;
when delta Pa2 is not more than delta Pt and is less than delta Pa3, the controller takes f2 as the opening frequency;
when the delta Pa3 is less than or equal to the delta Pt, the controller takes f3 as the opening frequency;
wherein, delta Pa1 is a first preset valve opening air pressure difference, delta Pa2 is a second preset valve opening air pressure difference, delta Pa3 is a third preset valve opening air pressure difference, and delta Pa1 is more than delta Pa2 and more than delta Pa3 and is more than or equal to delta Pt 3; f1 is a first preset turn-on frequency, f2 is a second preset turn-on frequency, f3 is a third preset turn-on frequency, and f1 is greater than f2 is greater than f 3.
6. The pressure equalization system for use with a sterilizer of claim 5, wherein the controller adjusts the pressure in the sterilization chamber in time based on the occurrence of cracks in the container to be sterilized during cooling of the container to be sterilized in the sterilization chamber, wherein,
when the inner wall of the container to be sterilized has cracks, the controller controls the air inlet control valve to be opened and stops the sterilization work;
when the outer wall of the container to be sterilized cracks, the controller controls the exhaust control valve to open and stops the sterilization work.
7. The pressure equalizing system for use in a sterilizer of claim 6, wherein the controller compares the number of cracks A with each preset number of cracks when cracks are generated in the inner wall of the container to be sterilized, and selects the emergency opening frequency of the air inlet control valve according to the comparison result, wherein,
when A1 is less than or equal to A < A2, the controller controls the air inlet control valve to be opened at a frequency H1;
when A2 is less than or equal to A < A3, the controller controls the air inlet control valve to be opened at a frequency H2;
when A3 is less than or equal to A, the controller controls the air inlet control valve to be opened at a frequency H3;
wherein A1 is a first preset crack number, A2 is a second preset crack number, A3 is a third preset crack number, A1 is more than A2 and is more than A3; h1 is a first preset emergency opening frequency, H2 is a second preset emergency opening frequency, H3 is a third preset emergency opening frequency, and H1 is more than H2 and more than H3.
8. The pressure balancing system for sterilizers according to claim 7, wherein the controller compares the average crack length D detected by the ultrasonic transmitter with each preset average crack length after selecting the emergency opening frequency of the air inlet control valve, and selects a corresponding emergency opening frequency adjustment coefficient according to the comparison result to adjust the selected ith preset emergency opening frequency Hi, where i is 1,2, and 3,
when the controller selects a j-th preset emergency opening frequency adjusting coefficient mj to adjust Hi, setting j to be 1,2 and 3, setting Hi' to be Hi multiplied by mj after the adjustment, wherein,
when D1 is not less than D < D2, the controller selects m1 to adjust Hi;
when D2 is not less than D < D3, the controller selects m2 to adjust Hi;
when D3 is not more than D, the controller selects m3 to adjust Hi;
wherein D1 is a first preset average crack length, D2 is a second preset average crack length, D3 is a third preset average crack length, and D1 is more than D2 and more than D3; m1 is a first preset emergency opening frequency adjusting coefficient, m2 is a second preset emergency opening frequency adjusting coefficient, m3 is a third preset emergency opening frequency adjusting coefficient, and m1 is more than 1 and more than m2 and more than m3 is less than 2.
9. The pressure equalization system for sterilizers according to claim 8, wherein the controller compares the average crack width B detected by the ultrasonic transmitter with each preset average crack width after the adjustment of the emergency opening frequency of the air inlet control valve is completed, and selects a corresponding emergency opening frequency correction coefficient according to the comparison result to correct the adjusted emergency opening frequency Hi', wherein,
when the controller selects the j-th preset emergency opening frequency correction coefficient nj to correct Hi ', setting j to be 1,2 and 3, setting the corrected emergency opening frequency to be Hi ', and setting Hi to be Hi ' × nj, wherein,
when B1 is not less than B and is less than B2, the controller selects n1 to correct Hi';
when B2 is not less than B and is less than B3, the controller selects n2 to correct Hi';
when B3 is not more than B, the controller selects n3 to correct Hi';
wherein B1 is the first preset average crack width, B2 is the second preset average crack width, B3 is the third preset average crack width, B1 is more than B2 and more than B3; n1 is a first preset emergency opening frequency correction coefficient, n2 is a second preset emergency opening frequency correction coefficient, n3 is a third preset emergency opening frequency correction coefficient, and n1 is more than 1 and more than n2 and more than n3 and less than 2.
10. The pressure balancing system for sterilizers according to claim 1, wherein when the controller controls the opening of the exhaust control valve or the intake control valve, the controller compares the acquired temperature T in the sterilization chamber with each preset sterilization chamber temperature and selects a corresponding control valve opening time according to the comparison result, wherein,
when T < T1, the controller sets the control valve opening time to T1;
when T1 is less than or equal to T < T2, the controller sets the opening time of the control valve to T2;
when T2 is less than or equal to T < T3, the controller sets the opening time of the control valve to T3;
wherein T1 is a first preset sterilization cabin temperature, T2 is a second preset sterilization cabin temperature, T3 is a third preset sterilization cabin temperature, and T1 is more than T2 and more than T3; t1 is the first preset control valve opening time, t2 is the second preset control valve opening time, t3 is the third preset control valve opening time, and t1 < t2 < t 3.
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