CN213099673U - Air-return heating and drying device for hydrogen peroxide sterilizer - Google Patents
Air-return heating and drying device for hydrogen peroxide sterilizer Download PDFInfo
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- CN213099673U CN213099673U CN202021591540.9U CN202021591540U CN213099673U CN 213099673 U CN213099673 U CN 213099673U CN 202021591540 U CN202021591540 U CN 202021591540U CN 213099673 U CN213099673 U CN 213099673U
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Abstract
A return air heating and drying device for a hydrogen peroxide sterilizer belongs to the technical field of sterilizers. The method is characterized in that: an air return heater (4) is arranged between the sterile filter (1) and the electromagnetic valve I (5); a deep vacuum drying device is additionally arranged between the first electromagnetic valve (5) and the sterilization chamber (14), and the first electromagnetic valve (5) and the sterilization chamber (14) are connected with the deep vacuum drying device through a three-way pipe (11). The utility model discloses add degree of depth vacuum drying device, carry out degree of depth vacuum drying to article such as the lumen apparatus that dry, thoroughly eliminate and remain moisture. And a return air preheater is arranged between the sterile filter and the electromagnetic valve, so that air entering the inner chamber is heated, instruments to be sterilized are assisted to heat and raise the temperature, and condensation of hydrogen peroxide gas is reduced. The sterilization device can not only ensure the sterility of the air in the inner chamber, but also ensure the temperature of the air entering the inner chamber after emptying, and can better assist in heating sterilization instruments.
Description
Technical Field
A return air heating and drying device for a hydrogen peroxide sterilizer belongs to the technical field of sterilizers.
Background
In recent years, due to the wide application of hydrogen peroxide plasma sterilizers in hospital sterilization supply rooms, there are many cases where the hydrogen peroxide plasma sterilizers fail in sterilization due to condensation of hydrogen peroxide during sterilization. Specifically, in the sterilization process of the hydrogen peroxide plasma sterilizer, continuous vacuumizing and emptying operations are carried out on the inner chamber for a plurality of times, and in the emptying process, cold air outside the equipment enters the inner chamber; the instruments to be sterilized are not completely dried, the temperature of the instruments is low, and when the ambient temperature of the hydrogen peroxide gas is low or the hydrogen peroxide gas is in contact with the instruments with low temperature, the hydrogen peroxide gas is condensed.
It is known that the condensation of hydrogen peroxide is caused by two main reasons: firstly, the sterilization apparatus is not completely dried, the apparatus has water or has low temperature, and condensation phenomenon can occur after the apparatus is contacted with hydrogen peroxide gas; secondly, the temperature of the returned gas is low, so that the temperature of the inner chamber is reduced, and the condensation phenomenon of hydrogen peroxide gas can be caused; the hydrogen peroxide is condensed, which directly results in the failure of the sterilization process, and even more, the hydrogen peroxide is locally over-corroded, which results in the damage of the instruments.
In view of the above problems, the current solutions are as follows:
preheating, namely preheating the instruments by utilizing the temperature of the cavity for ten minutes without immediately starting a sterilization program for sterilization when the sterilization instruments are placed in an inner chamber for sterilization after being dried and packaged, and starting the sterilization program for sterilization after the preheating is finished. Heating the heating film to raise the temperature of the heating film on the outer wall of the cavity, wherein the original heating film temperature is 50 ℃ and the current heating film temperature is 55 ℃. And thirdly, before the instruments are sterilized, the instruments are placed in a drying cabinet for drying, and sterilization is carried out after the instruments are dried.
However, after experiments, the first: the preheating proposal can reduce the frequency of condensation phenomenon of the hydrogen peroxide, but the sterilization efficiency is greatly reduced, and the sterilization time of each pot is increased by more than ten minutes.
And the second method comprises the following steps: according to the heating film heating scheme, although the surface temperature of the instruments in the inner chamber can be increased by increasing the heating temperature of the heating film, the temperature of the instruments is not uniformly heated in the mutual overlapping area of the instruments, and the energy consumption is increased by increasing the temperature of the heating film.
And the third is that: the drying effect of the lumen type instruments or the mutual superposition of the instruments is not good.
Although the above three prior art schemes can reduce the frequency of the condensation phenomenon of the hydrogen peroxide gas to a certain extent, the condensation phenomenon of the hydrogen peroxide cannot be fundamentally solved, so that the condensation phenomenon of the hydrogen peroxide is urgently needed to be solved.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: the defects of the prior art are overcome, and the phenomena of sterilization failure and the like caused by condensation, uneven diffusion and local excessive corrosion of hydrogen peroxide gas are avoided; the air-return heating and drying device for the hydrogen peroxide sterilizer ensures thorough drying of the instruments.
The utility model provides a technical scheme that its technical problem adopted is: this a return air heating and drying device for hydrogen peroxide sterilizer, its characterized in that: the sterilization device comprises a sterile filter, a first electromagnetic valve and a sterilization chamber which are sequentially connected through a pipeline, wherein an air return heater is arranged between the sterile filter and the first electromagnetic valve; and a deep vacuum drying device is additionally arranged between the first electromagnetic valve and the sterilization chamber, and the first electromagnetic valve and the sterilization chamber are connected with the deep vacuum drying device through a three-way pipe.
The utility model discloses change traditional structure, add degree of depth vacuum drying device between solenoid valve one and sterilization room, carry out degree of depth vacuum drying to article such as dry lumen apparatus, thoroughly eliminate and remain moisture, guarantee article sterilization effect. And a return air preheater is arranged between the sterile filter and the electromagnetic valve, so that air entering the inner chamber is heated, instruments to be sterilized are assisted to heat and raise the temperature, and condensation of hydrogen peroxide gas is reduced. The return air heater is arranged between the sterile filter and the electromagnetic valve on the return air pipeline, so that before the sterilization of the instruments, the vacuum drying of the articles can be firstly carried out, the drying degree of the instruments is ensured, the cold air entering the inner chamber of the hydrogen peroxide sterilizer is firstly filtered by the sterile filter, impurities in the air are removed, and the cold air is heated into hot air by the heater after the filtration, so that the sterility of the air in the inner chamber can be ensured, the temperature of the air entering the inner chamber after the return air is ensured, and the auxiliary heating of the sterilized instruments can be better carried out.
And two ends of the return air heater are respectively connected with the sterile filter and the electromagnetic valve through valve connectors.
The deep vacuum drying device comprises a vacuum pump, a corrugated pipe and a second electromagnetic valve, wherein the vacuum pump is connected with the second electromagnetic valve through the corrugated pipe and is connected with a three-way pipe through the second electromagnetic valve.
The air return heater is internally provided with a heating rod and a platinum thermal resistor, the heating rod is horizontally sleeved in the air return heater, one side of the heating rod is provided with a heating channel which is arranged in parallel, and the two ends of the heating channel are connected with the sterile filter and the electromagnetic valve through pipelines.
The surface of the heating rod is coated with heat-conducting silicone grease, and the platinum thermal resistor is arranged at one end part in the air return heater.
The two ends of the heating channel are provided with taper pipe threads for connection.
And a temperature control switch is arranged on one side of the return air heater.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
the utility model discloses change traditional structure, add degree of depth vacuum drying device between solenoid valve one and sterilization room, carry out degree of depth vacuum drying to article such as dry lumen apparatus, thoroughly eliminate and remain moisture, guarantee article sterilization effect. And a return air preheater is arranged between the sterile filter and the electromagnetic valve, so that air entering the inner chamber is heated, instruments to be sterilized are assisted to heat and raise the temperature, and condensation of hydrogen peroxide gas is reduced. The return air heater is arranged between the sterile filter and the electromagnetic valve on the return air pipeline, so that before the sterilization of the instruments, the vacuum drying of the articles can be firstly carried out, the drying degree of the instruments is ensured, the cold air entering the inner chamber of the hydrogen peroxide sterilizer is firstly filtered by the sterile filter, impurities in the air are removed, and the cold air is heated into hot air by the heater after the filtration, so that the sterility of the air in the inner chamber can be ensured, the temperature of the air entering the inner chamber after the return air is ensured, and the auxiliary heating of the sterilized instruments can be better carried out. Thereby achieving the effect of killing two birds with one stone.
Compared with the traditional preheating mode of equipment, the method can greatly improve the sterilization efficiency; compared with the traditional method for increasing the temperature of the heating film on the outer wall of the cavity, the method can play a role in saving energy. Practice proves that: compared with the traditional scheme of preheating and heating the film, the frequency of the condensation phenomenon of the hydrogen peroxide is reduced or even eliminated by using the air returning heater, and the effect is obvious.
Drawings
Fig. 1 is a schematic structural diagram of a return air heating and drying device for a hydrogen peroxide sterilizer.
Fig. 2 is a schematic view of the return air heater structure.
The device comprises a sterile filter 1, a sterile filter 2, a valve joint 3, a temperature control switch 4, an air return heater 5, a first electromagnetic valve 6, a welding elbow 7, a heating rod 8, a heating channel 9, a taper pipe thread 10, a platinum thermal resistor 11, a three-way pipe 12, a vacuum pump 13, a corrugated pipe 14, a sterilization chamber 15 and a second electromagnetic valve.
Detailed Description
Fig. 1 to 2 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 2.
Referring to the attached figures 1-2: a return air heating and drying device for a hydrogen peroxide sterilizer comprises a sterile filter 1, a first electromagnetic valve 5 and a sterilization chamber 14 which are sequentially connected through a pipeline, wherein a return air heater 4 is arranged between the sterile filter 1 and the first electromagnetic valve 5; a deep vacuum drying device is additionally arranged between the first electromagnetic valve 5 and the sterilization chamber 14, and the first electromagnetic valve 5 and the sterilization chamber 14 are connected with the deep vacuum drying device through a three-way pipe 11.
Two ends of the return air heater 4 are respectively connected with the sterile filter 1 and the electromagnetic valve 5 through the valve joint 2. One side of the return air heater 4 is provided with a temperature control switch 3.
The deep vacuum drying device comprises a vacuum pump 12, a corrugated pipe 13 and a second electromagnetic valve 15, wherein the vacuum pump 12 is connected with the second electromagnetic valve 15 through the corrugated pipe 13 and is connected with a three-way pipe 11 through the second electromagnetic valve 15.
A heating rod 7 and a platinum thermal resistor 10 are arranged in the return air heater 4, the heating rod 7 is horizontally sleeved in the return air heater 4 in a penetrating way, a heating channel 8 which is arranged in parallel is arranged on one side of the heating rod 7, and two ends of the heating channel 8 are connected with the sterile filter 1 and the electromagnetic valve 5 through pipelines. The surface of the heating rod 7 is coated with heat-conducting silicone grease, and the platinum thermal resistor 10 is arranged at one end part in the air return heater 4. Taper pipe threads 9 for connection are provided at both ends of the heating passage 8.
The working process is as follows: the vacuum pump 12 and the vacuum valve are opened, the sterilization chamber 14 is vacuumized, articles are dried in vacuum, after the operation is finished, the vacuum pump 12 stops working, the vacuum valve is closed, the return air valve is opened, cold air is filtered by the sterile filter 1, then the sterile air is heated by the return air heater 4, after the heating is finished, the electromagnetic valve I5 is opened under the negative pressure action of the hydrogen peroxide sterilizer chamber 14 (the electromagnetic valve is opened, closed and timed, and is controlled by a PLC (programmable logic controller)), the sterile and heated air enters the hydrogen peroxide sterilizer inner chamber 14 and is rapidly diffused, and instruments are heated in an auxiliary manner; meanwhile, the temperature of the cavity of the whole sterilization chamber 14 is increased, so that the temperature of the instruments and the temperature in the cavity are basically consistent with the temperature of the hydrogen peroxide gas diffused to the inner chamber, and the condensation phenomenon of the hydrogen peroxide gas is basically avoided.
The working principle is as follows: after the equipment is started, the heating rod 7 in the return air heater 4 does not work, the vacuum pump 12 starts to work, the pumping valve is opened, the object is subjected to vacuum drying, when the drying is finished, the heating rod 7 in the return air heater 4 is continuously heated to 45 ℃, then the evacuation pipeline is closed, the return pipeline is opened, the inner chamber is subjected to return air heating, then the sterilization program runs, and the heating rod 7 is heated for 2.5 seconds at intervals of 20 seconds, and the temperature is maintained at about 63 ℃; the platinum thermal resistor 10 constantly monitors the temperature of the main body of the return air heater 4, transmits a signal to the PLC controller, and the PLC controller determines whether to start the heating rod 7 for heating; the upper and lower alarm limits are 45 ℃ and 65 ℃, and the temperature is lower than 45 ℃, and heating is started; above 65 ℃, the heating is stopped. For the heating control of the heating rod 7, double insurance is adopted, generally, a solid-state relay and a PLC (programmable logic controller) are adopted, if the solid-state relay is damaged in the working process of the heating rod 7, the heating rod 7 is continuously heated to 80 ℃, the temperature control switch 3 is directly involved, and a heating pipeline is cut off.
Before the sterilization of the apparatus, the articles are dried in vacuum firstly, the drying degree of the apparatus is ensured, the return air heater 4 is arranged between the sterile filter 1 on the return air pipeline and the first electromagnetic valve 5, so that cold air entering the inner chamber of the hydrogen peroxide sterilizer 14 is firstly filtered by the sterile filter 1 to remove impurities in the air, and is heated by the return air heater 4 after being filtered to heat the cold air into hot air, thus the sterility of the air in the inner chamber can be ensured, the temperature of the return air entering the inner chamber can be ensured, and the auxiliary heating of the sterilized apparatus can be better carried out. Thereby achieving the effect of killing two birds with one stone.
Compared with the preheating mode of ten minutes before the traditional equipment is sterilized each time, the method can greatly improve the sterilization efficiency; compared with the traditional method for increasing the temperature of the heating film on the outer wall of the cavity, the method can play a role in saving energy. Practice proves that: compared with the traditional scheme of preheating and heating the film, the frequency of the condensation phenomenon of the hydrogen peroxide is reduced or even eliminated by using the air returning heater, and the effect is obvious.
The material of the return air heater 4 main body is aluminum alloy 5052, because the heat conductivity of the aluminum alloy is very good, and is second to gold and silver. The heating channel 8 of the return air heater 4 is a round hole with the size of phi 10, and two ends of the round hole are provided with conical pipe threads 9, so that the sealing performance of the heating channel 8 can be ensured, and the cold air can be heated uniformly in a limited time. The upper and lower alarm limits (45 ℃ and 65 ℃) of the return air heater 4 are lower than 45 ℃, and heating is started; above 65 ℃, the heating is stopped. The heating control of the heating rod 7 adopts double insurance, generally, the heating control adopts a solid-state relay and a PLC controller, if the solid-state relay is damaged in the working process of the heating rod 7, the heating rod is continuously heated to 80 ℃, a temperature control switch is directly involved, and a heating pipeline is cut off. The evacuation pipeline is assembled by a corrugated pipe and an electromagnetic valve vacuum pump.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (7)
1. A return air heating and drying device for a hydrogen peroxide sterilizer is characterized in that: comprises a sterile filter (1), a first electromagnetic valve (5) and a sterilization chamber (14) which are sequentially connected through a pipeline, wherein an air return heater (4) is arranged between the sterile filter (1) and the first electromagnetic valve (5); a deep vacuum drying device is additionally arranged between the first electromagnetic valve (5) and the sterilization chamber (14), and the first electromagnetic valve (5) and the sterilization chamber (14) are connected with the deep vacuum drying device through a three-way pipe (11).
2. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 1, wherein: and two ends of the air return heater (4) are respectively connected with the sterile filter (1) and the electromagnetic valve I (5) through the valve joint (2).
3. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 1, wherein: the deep vacuum drying device comprises a vacuum pump (12), a corrugated pipe (13) and a second electromagnetic valve (15), wherein the vacuum pump (12) is connected with the second electromagnetic valve (15) through the corrugated pipe (13) and is connected with a three-way pipe (11) through the second electromagnetic valve (15).
4. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 1, wherein: the air return heater (4) is internally provided with a heating rod (7) and a platinum thermal resistor (10), the heating rod (7) is horizontally sleeved in the air return heater (4), one side of the heating rod (7) is provided with a heating channel (8) which is arranged in parallel, and the two ends of the heating channel (8) are connected with the sterile filter (1) and the electromagnetic valve I (5) through pipelines.
5. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 4, wherein: the surface of the heating rod (7) is coated with heat-conducting silicone grease, and the platinum thermal resistor (10) is arranged at one end part in the return air heater (4).
6. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 4, wherein: two ends of the heating channel (8) are provided with taper pipe threads (9) for connection.
7. The return air heating and drying apparatus for a hydrogen peroxide sterilizer as claimed in claim 1, wherein: and a temperature control switch (3) is arranged on one side of the air return heater (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021591540.9U CN213099673U (en) | 2020-08-04 | 2020-08-04 | Air-return heating and drying device for hydrogen peroxide sterilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021591540.9U CN213099673U (en) | 2020-08-04 | 2020-08-04 | Air-return heating and drying device for hydrogen peroxide sterilizer |
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| Publication Number | Publication Date |
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| CN213099673U true CN213099673U (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021591540.9U Active CN213099673U (en) | 2020-08-04 | 2020-08-04 | Air-return heating and drying device for hydrogen peroxide sterilizer |
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| CN (1) | CN213099673U (en) |
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- 2020-08-04 CN CN202021591540.9U patent/CN213099673U/en active Active
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