Intelligent ethylene oxide sterilization preheating desorption chamber

Abstract

The invention relates to a preheating and analyzing chamber for sterilization articles widely applied to the field of ethylene oxide sterilization, in particular to a full-intelligent ethylene oxide sterilization preheating and analyzing chamber with two functions of preheating and analyzing. The invention provides a full-intelligent ethylene oxide sterilization preheating analysis chamber. The full-intelligent ethylene oxide sterilization preheating analysis chamber is characterized in that 1, the intelligent ethylene oxide sterilization preheating analysis chamber can be used as a preheating chamber and an analysis chamber; 2, when the intelligent ethylene oxide sterilization intelligent preheating analysis chamber is used as a preheating chamber and an analysis chamber, the same ventilation path is performed indoors and is controlled by the same circulating fan, and the difference is that a preheating mode of closed-loop circulating hot air is adopted when the intelligent ethylene oxide sterilization intelligent preheating analysis chamber is used as the preheating chamber, and an analysis mode of opening air inlet and opening air exhaust is adopted when the intelligent ethylene oxide sterilization intelligent preheating analysis chamber is used as the analysis chamber; the function of the ventilation pipeline is controlled by a control valve of the ventilation pipeline; 3, an ethylene oxide gas detector is designed and mounted at an air outlet of the preheating analysis chamber, ethylene oxide detection analysis is carried out on indoor air, and the functions of the preheating chamber and the analysis chamber are intelligently judged and executed.

Description

Technical Field

[0001] The present invention relates to a preheating and desorption chamber for sterilized articles widely used in the field of ethylene oxide sterilization, in particular to a full-intelligent ethylene oxide sterilization preheating and desorption chamber having both preheating and desorption functions. Background Art

[0002] Ethylene oxide is a broad-spectrum sterilant that can kill a variety of microorganisms. Moreover, it can penetrate the packaging of medical devices for sterilization and ensure the long-term sterility of sterilized items. Therefore, it is widely used for the sterilization of medical devices.

[0003] When sterilizing with ethylene oxide, a dedicated ethylene oxide sterilizer is used. The sterilization condition parameters of the ethylene oxide sterilizer are a sterilization concentration between 600mg / L and 800mg / L, an optimal sterilization temperature of about 54°C, and a sterilization humidity of about 60%RH. Medical devices sterilized with ethylene oxide will have a certain amount of ethylene oxide residue after sterilization. According to the requirements for medical devices sterilized with ethylene oxide in the national pharmacopoeia, the ethylene oxide residue must be less than 10ug / g to be safe for use. In order to achieve an effective sterilization effect, the sterilized items must first be preheated during ethylene oxide sterilization to reach an effective sterilization temperature (about 54°C). However, it takes a long time to preheat the sterilized items in the sterilizer, especially for larger sterilizers, where the sterilized items are more than ten cubic meters or even dozens of cubic meters to hundreds of cubic meters. It takes a long time to heat all the sterilized items to the sterilization temperature, especially in the winter when the temperature is low. In order to improve the efficiency of the sterilizer, a preheating chamber is needed to sterilize the items to a certain temperature, and then put them into the sterilizer for preheating. This can greatly reduce the preheating time of the sterilized items in the sterilizer and improve the utilization efficiency of the sterilizer. At present, some sterilization units have built preheating chambers. These preheating chambers simply heat up the preheating chambers, and then heat up the items in the chamber to achieve the function of the preheating chamber. Such preheating chambers have high energy consumption and low efficiency. At the same time, after sterilization, sterilized items often have high ethylene oxide residues, especially in low-temperature seasons. These ethylene oxide residues are difficult to evaporate naturally to meet the use requirements (less than 10ug / g). In order to make the sterilized items reach the ethylene oxide residue standard as soon as possible, it is necessary to establish a desorption chamber to parse the sterilized items after sterilization. At present, the established desorption chambers are simple heating and ventilation, and heating and ventilation are a contradiction in themselves. Therefore, such desorption chambers waste energy, have low efficiency, and high desorption costs. The current preheating chamber and desorption chamber are two independent facilities, and there is no intelligent ethylene oxide sterilization intelligent preheating desorption chamber that can take into account both preheating and desorption functions. Summary of the invention

[0004] In order to overcome the shortcomings that the existing preheating chamber and decomposition chamber of ethylene oxide sterilization cannot take into account the functions of both the preheating chamber and the decomposition chamber at the same time, duplicate construction is required and they cannot be intelligently controlled, resulting in high investment costs, high energy consumption and low efficiency.

[0005] The present invention provides a fully intelligent ethylene oxide sterilization preheating analysis chamber, which is characterized by:

[0006] 1. Build an intelligent ethylene oxide sterilization intelligent preheating and desorption chamber, which can be used as both a preheating chamber and a desorption chamber;

[0007] 2. This intelligent ethylene oxide sterilization intelligent preheating and desorption chamber has the same ventilation path when used as a preheating chamber and a desorption chamber, and is controlled by the same circulating fan. The difference is that when used as a preheating chamber, a closed-circuit circulating hot air preheating method is adopted, and when used as a desorption chamber, an open air intake and open air exhaust desorption method is adopted, and its function is controlled by the control valve of the ventilation duct;

[0008] 3. The present invention designs and installs an ethylene oxide gas detector at the air outlet of the preheating and decomposition chamber, and performs ethylene oxide detection and analysis on the indoor air, and intelligently determines whether to execute the functions of the preheating chamber and the decomposition chamber; that is, if the sterilized items that need to be preheated before sterilization are placed in the room, the preheating function is automatically performed by intelligent judgment; if the items that need to be decomposed after sterilization are placed in the room, the decomposition chamber function is automatically performed by intelligent judgment. At the same time, the preheating and decomposition ventilation processes are intelligently controlled to reduce energy consumption and save costs.

[0009] The technical solution adopted by the present invention to solve its technical problem is:

[0010] First of all, the preheating and decomposition chamber is an insulation chamber built with insulation materials. The preheating and decomposition chamber is designed and installed with temperature and humidity sensors and detectors and ethylene oxide gas sensors and detectors, and a set of hot air heating and decomposition system is designed accordingly. The system includes: a heating unit, a circulating fan, a ventilation duct and a fresh air exchange system, and a pipeline control valve. The outlet of the hot air heating and decomposition system is connected to the ventilation port opened on the top of the preheating and decomposition chamber, and enters the insulation chamber to heat the sterilized or decomposed items in the room. The outlet is opened at the bottom of the preheating and decomposition chamber, and the outlet is connected to the outlet duct. In order to ensure uniform heating of the sterilized or decomposed items, there must be multiple air inlets and multiple air outlets around the room. The outlet duct is divided into two routes, and its connection and cutoff are controlled by the control valve. One route is connected to the air inlet of the hot air heating and decomposition system, and the other route is connected to the fresh air system for heat exchange and then discharged into the outdoor atmosphere. The air inlet of the hot air heating and desorption system also has two pipes with control valves. One is the air outlet pipe connected to the preheating and desorption chamber, forming a closed-loop preheating circuit during preheating, and the other is connected to the fresh air system. During desorption, the purified air after heat exchange and heating is blown into the room to desorb the sterilized items. In this way, by combining the design of a set of intelligent control software to analyze the signals sent by the temperature and humidity sensor and the ethylene oxide gas sensor and detector, the function of the fully intelligent ethylene oxide sterilization preheating and desorption chamber can be realized. The control principle is: when the sterilized items that need to be preheated before sterilization are placed in the intelligent preheating and desorption chamber, the information sent by the temperature and humidity sensor received by the intelligent control software should be lower than the set preheating temperature and humidity (such as the set value is 50℃, 60%RH), and the ethylene oxide gas detection value received from the ethylene oxide gas detector must be zero. At this time, the intelligent control software can determine that it is a preheating item, start the preheating program, and circulate preheating for the items in the room; and when the items that can be placed are items that need to be desorbed after sterilization, the ethylene oxide gas detector sends The ethylene oxide gas detection value received must be a value greater than zero. At this time, the intelligent control software can determine that it is an analysis item, start the analysis program, and perform exhaust analysis on the indoor items until the ethylene oxide gas detection value sent by the ethylene oxide gas detector is zero. This exhaust analysis is completed. At this time, if the indoor temperature is lower than the analysis value, heating will be started to facilitate the precipitation of ethylene oxide residues in the analysis items into the room. When the ethylene oxide gas detector detects indoor ethylene oxide, a new round of analysis and exhaust work will start. This repetition can complete accurate analysis work.

[0011] The beneficial effects of the present invention are:

[0012] The innovative realization of building an intelligent ethylene oxide sterilization intelligent preheating and decomposition chamber can take into account the functions of both the preheating chamber and the decomposition chamber, and can automatically and intelligently identify the execution of preheating or decomposition functions, thereby improving equipment utilization and efficiency. At the same time, through intelligent control of the preheating and decomposition processes, energy consumption can be reduced and costs can be saved.

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a working principle diagram of the present invention.

[0015] In the attached Figure 1 Among them, 1 is the preheating and analysis room; 2 is the preheating and analysis system; 3 is the fresh air system; 4 is the No. 1 temperature and humidity sensor; 5 is the No. 2 temperature and humidity sensor 2; 6 is the ethylene oxide gas detector; 7 is the preheating return air duct; 8 is the insulation wall of the preheating and analysis room; 9 is the analysis outlet air duct; 10 is the fresh air system purified air inlet duct; K1, k2, k3, k4, k5, k6 are all pipeline control valves.

[0016] Specific implementation method: When the sterilization or analysis items are placed in the sterilization cabinet of the present invention and the work is started, if the ethylene oxide information value sent by the ethylene oxide gas detector 6 received by the computer control system is zero, the intelligent control system determines that the items are preheated and starts the preheating program function. At this time, if the temperature and humidity sent to the computer control system by the No. 1 temperature and humidity sensor 4 or the No. 2 temperature and humidity sensor 5 is lower than the set value, the preheating unit of the 2 preheating and analysis system is heated, the circulating fan is started, the k1 and k2 control valves are opened, and the other control valves are closed. Hot air enters from the top of the 1 preheating and analysis chamber to heat and humidify the items in the room. Subsequently, the return air after heating and humidification passes through the 7 preheating return air duct and the k1 and k2 control valves to the air inlet of the 2 preheating and analysis system, and enters the 2 preheating and analysis system for cyclic preheating and heating, until the temperature and humidity sent to the computer control system by the No. 1 temperature and humidity sensor 4 or the No. 2 temperature and humidity sensor 5 reaches the set value, then the preheating is completed. After a certain period of insulation and constant temperature, a preheating completion signal is issued, and the preheating is ended. When the sterilization or analysis items are placed in the sterilization cabinet of the present invention and the work is started, if the ethylene oxide information value sent by the ethylene oxide gas detector 6 received by the computer control system is not zero, the intelligent control system determines that it is an analysis item and starts the analysis program. At this time, the circulation fan of the 2 preheating analysis system is started, the k3, k4, k5, and k6 control valves are opened, and the other control valves are closed. The outdoor purified air sent from the fresh air system passes through 10, which is the fresh air system purified air inlet duct and k5, k6 control valves, and is then sent to the 1 preheating analysis chamber by the circulation fan, and the indoor exhaust gas discharged from the 1 preheating analysis chamber passes through the k3, k4 control valves and 9 analysis outlet air ducts. The pipe enters the 3 fresh air system and is discharged outdoors after heat exchange. After such continuous ventilation and exhaust, the residual ethylene oxide gas in the 1 preheating and decomposition chamber is discharged. When the 6 ethylene oxide gas detector sends the ethylene oxide information value to zero, the decomposition work is completed. The 1 preheating and decomposition chamber enters the heating and insulation state so that the ethylene oxide residue in the decomposition items can be gradually volatilized to the 1 preheating and decomposition chamber. At this time, the 6 ethylene oxide gas detector can monitor the ethylene oxide gas again and repeat the next round of decomposition work. After such a repeated process, the 6 ethylene oxide gas detector can no longer detect ethylene oxide gas, and the decomposition work is completed. The full-intelligent ethylene oxide sterilization preheating and decomposition chamber work task is realized.

Claims

1. An intelligent ethylene oxide sterilization preheating analysis chamber is characterized by: Build an intelligent ethylene oxide sterilization intelligent preheating and decomposition room, which can be used as both a preheating room and a decomposition room.

2. An intelligent ethylene oxide sterilization intelligent preheating desorption chamber as described in claim 1, characterized in that: When used as a preheating room and a decomposition room, the same ventilation path is used indoors and is controlled by the same circulating fan. The difference is that when used as a preheating room, a closed-circuit circulating hot air preheating method is adopted, and when used as a decomposition room, an open air intake and open air exhaust decomposition method is adopted, and its function is controlled by the control valve of the ventilation duct.

3. An intelligent ethylene oxide sterilization intelligent preheating analysis chamber, characterized by: The present invention designs and installs an ethylene oxide gas detector at the air outlet of the preheating and decomposition chamber, performs ethylene oxide detection and analysis on the indoor air, and intelligently determines and executes the functions of the preheating chamber and the decomposition chamber.

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