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Pressure steam sterilizer dynamic pulse type gas exhausting method

A pressure steam, dynamic pulse technology, applied in sanitary equipment, water supply devices, heating and other directions for toilets, can solve problems such as reducing the latent heat of steam, affecting the sterilization effect, affecting the steam saturation, etc., and achieves good steam penetration and improvement. The effect of the sterilization effect

Inactive Publication Date: 2008-01-16
SHINVA MEDICAL INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For pressure steam sterilizers, if the cold air in the sterilizer cannot be completely removed as much as possible before sterilization, the saturation of the steam will be affected, the latent heat of the steam will be reduced, and the sterilization effect within a fixed sterilization time will be affected.

Method used

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  • Pressure steam sterilizer dynamic pulse type gas exhausting method
  • Pressure steam sterilizer dynamic pulse type gas exhausting method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] For the application on the lower exhaust type sterilizer, after the water injection is completed, before the cavity temperature reaches the local boiling point temperature, the exhaust valve is kept open, and the exhaust valve is closed after reaching the boiling point temperature.

[0022] Open the steam inlet valve to enter the steam, when the temperature of the sterilizer cavity reaches the set opening point, close the exhaust valve to suspend the exhaust and continue to enter the steam to increase the temperature and pressure. When the cavity temperature reaches the set upper limit value, close the steam inlet valve, open the exhaust valve, and reduce the temperature and pressure of the cavity; when the cavity temperature reaches the set lower limit value closing point, close the exhaust valve, open Inlet valve, and then continue to heat up. Repeatedly performing positive pressure exhaust for 2-4 times in this way, on the one hand, it can control the time point of s...

Embodiment 2

[0032] As shown in Figure 1, for the application on the pre-vacuum sterilizer, draw a deep vacuum first. The vacuum can be set to -70Kpa (corresponding to an absolute pressure of 30Kpa).

[0033] Then open the steam inlet valve to feed steam into the sterilizer cavity to raise the temperature. When the pressure rises to a settable upper limit of the pressure point between 100-200Kpa (corresponding to the absolute pressure of 200-300Kpa), the exhaust valve is opened to exhaust steam. When the exhaust reaches a lower limit of the pressure point that can be set between 10-100KPa (corresponding to the absolute pressure of 110-200Kpa), close the exhaust valve. Inject steam into the cavity again. The chamber pressure rises accordingly. When the pressure rises to the upper limit of the set pressure point, the exhaust will be carried out. Repeat this cycle 3 times.

[0034] After the exhaust process is over, continue to enter the steam to raise the temperature until it enters the...

Embodiment 3

[0036] As shown in Figure 2, the application of the dynamic pulse exhaust method on the pulsating vacuum sterilizer requires three pulsating vacuuming processes. The upper limit and lower limit of pulsating vacuum setting are respectively set to 60Kpa (corresponding to 160Kpa under absolute pressure) and -80Kpa (corresponding to 20Kpa under absolute pressure). Then steam is fed into the cavity of the pulse vacuum sterilizer to raise the temperature. When the chamber pressure rises to a settable upper limit of the pressure point (such as 180Kpa) between 100-200Kpa (corresponding to an absolute pressure of 200-300Kpa), exhaust steam. Exhaust steam, and close the exhaust valve when the pressure in the cavity drops to a settable lower limit of the pressure point (such as 30Kpa) between 10-100KPa (corresponding to the absolute pressure of 110-200Kpa). Inject steam into the chamber again. The chamber pressure rises accordingly. When the pressure rises to the upper limit of the se...

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Abstract

The invention relates to a dynamic pulse type exhaust method of a pressure steam sterilizer, which is used for improving the cold air exhaust effect of the pressure steam sterilizer, firstly, the pretreatment exhaust of the pressure steam sterilizer need to be conducted, the variables of the sterilizer body need to be gathered, the upper limit value and the lower limit value need to be set, and then one to nine times of intermittent process of repetitive steam inlet and outlet are added, the steam inlet raises the variable of the sterilizer body all the way to the upper limit value, and then the steam exhaust outlet reduces the variable of the body gradually to the lower limit value. The invention can further exhaust the residual cold air in the sterilizer body as much as possible, then the temperature of the steam inlet raises continuously until coming to the sterilization process, so the sterilization begins, then the cold air exhaust effect is good, the penetration of steam is excellent, so the sterilization effect is largely improved.

Description

technical field [0001] The invention relates to a dynamic pulse exhaust method for a pressure steam sterilizer, which is used for improving the cold air removal effect of the pressure steam sterilizer. Background technique [0002] The pressure steam sterilizer is suitable for the sterilization of medical devices and articles resistant to high temperature and high humidity. According to the way and degree of cold air discharge, pressure steam sterilizers are divided into two categories: down-exhaust pressure steam sterilizers and pre-vacuum pressure steam sterilizers. [0003] Sterilization principle of the bottom exhaust pressure steam sterilizer: using the principle of gravity displacement, the hot steam flows from top to bottom in the sterilizer, and the cold air is discharged from the lower exhaust hole, and the discharged cold air is replaced by saturated steam , using the latent heat released by steam to sterilize items. When answering the technical questions when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L2/07A61L2/24
Inventor 张帆王道军
Owner SHINVA MEDICAL INSTR CO LTD
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