Hydrogen peroxide anti-condensation device

Abstract

The utility model discloses a hydrogen peroxide anti-condensation device, which relates to the technical field of medical sterilization equipment and comprises a sterilization cabin provided with a sterilization circulation pipeline, a flash evaporator is arranged in the sterilization circulation pipeline and connected with a storage barrel, and the flash evaporator is used for extracting a hydrogen peroxide solution in the storage barrel; the preheater is communicated with the low-dew-point compressed air dryer, receives and heats the compressed air, the preheater is communicated with the flash evaporator, and the compressed air assists the flash evaporator to generate hydrogen peroxide steam; the control system is in signal connection with the preheater, the flash evaporator and the low-dew-point compressed air drying machine and controls starting and stopping of the preheater, the flash evaporator and the low-dew-point compressed air drying machine. The concentration of hydrogen peroxide in the cabin is reduced, so that the sterilization efficiency is reduced, and deposited hydrogen peroxide liquid corrodes equipment in the cabin.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical sterilization equipment technical field, especially a hydrogen peroxide anti-condensation device. BACKGROUND

[0002] Vaporized hydrogen peroxide (VHP) is a technology that uses the advantage that hydrogen peroxide in gaseous state has stronger ability to kill bacterial spores than in liquid state at normal temperature to achieve complete sterilization. It is commonly used for sterilization in closed spaces such as clean rooms and sterile isolators. However, in actual use, the vaporized hydrogen peroxide is affected by the temperature difference between the inside and outside of the sterilization cabin or the increase in humidity inside the cabin, resulting in condensation of hydrogen peroxide vapor and formation of tiny hydrogen peroxide droplets adhering to the surface of the sterilized objects and the inner surface of the cabin door, which reduces the concentration of hydrogen peroxide in the sterilization chamber and lowers the sterilization efficiency. In addition, the deposited hydrogen peroxide solution corrodes the indoor equipment.

[0003] In summary, it is an urgent problem for those skilled in the art to develop a hydrogen peroxide anti-condensation device that avoids the liquefaction of hydrogen peroxide vapor in the cabin. SUMMARY

[0004] The utility model aims at providing a hydrogen peroxide anti-condensation device to solve the technical problem that the hydrogen peroxide vapor in the sterilization cabin is affected by the temperature difference between the inside and outside of the cabin or the increase in humidity inside the cabin, condenses into hydrogen peroxide droplets, and affects the sterilization efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a hydrogen peroxide anti-condensation device, which comprises:

[0006] The sterilization cabin is provided with a sterilization circulation pipeline, a flash evaporator is arranged in the sterilization circulation pipeline, the flash evaporator is connected with a storage barrel, and the flash evaporator is used to extract hydrogen peroxide solution in the storage barrel;

[0007] A preheater is in communication with the low-dew-point compressed air dryer, the preheater receives and heats the compressed gas generated by the low-dew-point compressed air dryer, the preheater is in communication with the flash evaporator, and the compressed gas assists the flash evaporator to generate hydrogen peroxide vapor;

[0008] A control system is in signal connection with the preheater, the flash evaporator, and the low-dew-point compressed air dryer, and is used to control the start and stop of the preheater, the flash evaporator, and the low-dew-point compressed air dryer, so that the sterilization cabin can be dehumidified and heated and sterilized.

[0009] Preferably, a first valve and a first air blower are connected between the preheater and the low-dew-point compressed air dryer, a second valve is arranged between the flash evaporator and the inner cavity of the sterilization cabin, and after the control system opens the first valve and the second valve, the first air blower blows the compressed gas generated by the low-dew-point compressed air dryer into the preheater.

[0010] Preferably, the sterilization cabin is provided with a ventilation pipeline and a ventilation window, the ventilation pipeline is provided with a second fan and a third valve, the ventilation window is provided with a first ventilation valve and a second ventilation valve connected in parallel, and the first ventilation valve and the second ventilation valve are communicated with the third fan.

[0011] Preferably, a metering pump is connected between the flash evaporator and the storage barrel, and the metering pump controls the volume of hydrogen peroxide solution extracted by the flash evaporator.

[0012] Preferably, the sterilization circulation pipeline and the ventilation pipeline are not communicated with each other, the first valve, the second valve and the first ventilation valve are opened, and the first fan is operated when dehumidification and temperature rising and sterilization operations are performed.

[0013] When the ventilation operation is performed, the third valve and the second ventilation valve are opened, and the second fan and the third fan are operated.

[0014] Preferably, the sterilization cabin is provided with a temperature sensor, a humidity sensor and a concentration sensor connected with the control system, and the control system is used to detect the temperature, relative humidity, absolute humidity and hydrogen peroxide concentration in the sterilization cabin.

[0015] Preferably, when the concentration sensor detects that the hydrogen peroxide concentration in the sterilization cabin reaches the upper limit of the preset range, the control system closes the metering pump to stop the flash evaporator from generating hydrogen peroxide vapor, and starts the third fan to perform dehumidification and temperature rising operation, and when the hydrogen peroxide concentration reaches the lower limit of the preset range, the third fan is closed, and the operation of the metering pump is restored, and the flash evaporator operates to produce hydrogen peroxide vapor.

[0016] Preferably, the bottom surface of the storage barrel is provided with a weighing device, the control system is connected with the weighing device and the metering pump, and the control system is used to detect whether the amount of hydrogen peroxide in the storage barrel is insufficient or the metering pump and the storage barrel are damaged.

[0017] Preferably, the periphery of the sterilization cabin is provided with a heat preservation sleeve, and the sidewall of the sterilization cabin is provided with a heating window, and the heat preservation sleeve and the heating window are used to adjust the temperature in the sterilization cabin.

[0018] Preferably, the dew point of the compressed air output by the low-dew-point compressed air dryer is less than or equal to-20℃, and the air pressure range is 0.4~0.7MPa.

[0019] With respect to the above background, the hydrogen peroxide anti-condensation device provided by the utility model includes: a sterilization cabin, the inner cavity of the sterilization cabin is communicated with a sterilization circulating pipeline, a flash evaporator is arranged in the sterilization circulating pipeline, the flash evaporator is communicated with a storage barrel, the flash evaporator extracts hydrogen peroxide solution in the storage barrel, the flash evaporator is also communicated with a low-dew-point compressed air dryer, the low-dew-point compressed air dryer introduces compressed gas into the flash evaporator, the dew point of the compressed gas is low, so that the compressed gas entering the flash evaporator is dry gas, it should be noted that a preheater is connected between the flash evaporator and the low-dew-point compressed air dryer, the preheater warms up the compressed gas, improves the hydrogen peroxide saturation of the compressed gas, avoids condensation loss caused by the contact between hydrogen peroxide vapor and cold air during the conveying process, and accelerates the improvement of the hydrogen peroxide concentration in the sterilization cabin, and a control system is also arranged in the sterilization cabin, the control system is signal connected with the flash evaporator, the preheater and the low-dew-point compressed air dryer, when only the preheater and the low-dew-point compressed air dryer are operated, the preheater heats low-dew-point compressed gas generated by the low-dew-point compressed air dryer, the gas is input into the flash evaporator and directly blown into the sterilization cabin, so that the temperature in the sterilization cabin is improved and the humidity in the cabin is reduced. Subsequently, the control assembly controls the flash evaporator, the preheater and the low-dew-point compressed air dryer to operate simultaneously, the flash evaporator can generate hydrogen peroxide vapor with high temperature and low relative humidity, so that the hydrogen peroxide vapor output from the flash evaporator to the inner cavity of the sterilization cabin is not easy to condense. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only the embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to the provided drawings without creating labor.

[0021] Figure 1 The working flow chart of the hydrogen peroxide anti-condensation device provided by the embodiments of the present utility model.

[0022] Among them, 1-sterilization cabin;2-flash evaporator;3-storage barrel;4-preheater;5-low-dew-point compressed air dryer;6-control system;7-first valve;8-second valve;9-third valve;10-first fan;11-second fan;12-first ventilation valve;13-second ventilation valve;14-metering pump;15-weigher;16-heat preservation sleeve;17-heating window;18-temperature sensor;19-humidity sensor;20-concentration sensor;21-third fan. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application.

[0024] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0025] The application provides a hydrogen peroxide anti-condensation device, which comprises a sterilization cabin 1, a sterilization circulation pipeline is communicated in the inner cavity of the sterilization cabin 1, a low-dew-point compressed air dryer 5 is arranged in the sterilization circulation pipeline, the compressed air generated by the low-dew-point compressed air dryer 5 has small humidity, the low-dew-point compressed air dryer 5 is communicated with a preheater 4, the compressed air is blown into the preheater 4 to be warmed, the saturation of the compressed air to hydrogen peroxide is improved, the preheater 4 communicates the warmed compressed air into a flash evaporator 2, the flash evaporator 2 is also communicated with a storage barrel 3, the flash evaporator 2 extracts hydrogen peroxide solution in the storage barrel 3, the compressed air is further blown to disperse the hydrogen peroxide solution in the flash evaporator 3, so that the hydrogen peroxide solution is rapidly vaporized to form hydrogen peroxide vapor, the dry compressed air reduces the relative humidity of the hydrogen peroxide vapor generated by the flash evaporator 2, and the hydrogen peroxide vapor has high temperature, when the hydrogen peroxide vapor is blown into the sterilization cabin 1, the hydrogen peroxide vapor is not easy to condense, the hydrogen peroxide concentration in the sterilization cabin 1 is accelerated to improve the rate, further, a control system 6 is arranged in the sterilization cabin 1, the control system 6 is signal connected with the preheater 4, the low-dew-point compressed air dryer 5 and the flash evaporator 2, the control system 6 controls the start and stop of the preheater 4, the low-dew-point compressed air dryer 5 and the flash evaporator 2 to realize the dehumidification and temperature rising of the sterilization cabin 1 and the sterilization operation, when the control system 6 controls the preheater 4 and the low-dew-point compressed air dryer 5 to work, the low-dew-point compressed air dryer 5 inputs dry compressed air into the preheater 4, the compressed air enters the flash evaporator 2 after being heated by the preheater 4, but the flash evaporator 2 stops running, the compressed air is directly communicated into the sterilization cabin 1 to improve the temperature in the sterilization cabin 1 and reduce the humidity in the cabin, when the dehumidification and temperature rising of the sterilization cabin 1 are completed, the operation system controls the flash evaporator 2 to run, the flash evaporator 2 extracts the hydrogen peroxide solution in the storage barrel 3, and forms hydrogen peroxide vapor with low humidity by dry compressed air, the flash evaporator 2 delivers the hydrogen peroxide vapor into the sterilization cabin 1, the dehumidification and temperature rising operation form the cabin environment with high temperature and low humidity, which greatly reduces the condensation rate of the hydrogen peroxide vapor.

[0026] It should be noted that the first valve 7 and the first fan 10 are arranged between the preheater 4 and the low-dew-point compressed air dryer 5, the second valve 8 is arranged between the flash evaporator 2 and the inner cavity of the sterilization cabin 1, the first valve 7, the second valve 8 and the first fan 10 are signal-connected with the control system 6, the first valve 7 and the second valve 8 are used to control the communication and separation of the low-dew-point compressed air dryer 5 and the preheater 4 and the flash evaporator 2 and the sterilization cabin 1, when the dehumidification and temperature rising operation is performed, the first valve 7 and the second valve 8 are opened and the first fan 10 is started, the first fan 10 blows the low-temperature compressed air into the preheater 4 to rise the temperature, the airflow generated by the first fan 10 blows the heated compressed air into the flash evaporator 2, and the hydrogen peroxide steam generated by the flash evaporator 2 is transported into the sterilization cabin 1.

[0027] Further, the sterilization circulation pipeline which communicates with the inner cavity of the sterilization cabin 1 is arranged in the sterilization cabin 1, the ventilation window is further arranged in the side wall of the sterilization cabin 1, the second fan 11 and the third valve 9 are arranged in the sterilization circulation pipeline, the first ventilation valve 12 and the second ventilation valve 13 which are parallel to each other are arranged in the ventilation window, the first ventilation valve 12 and the second ventilation valve 13 are connected in series with the third fan 21 after being connected in parallel, the ventilation window communicates with the external environment of the sterilization cabin 1, when the dehumidification and temperature rising operation is performed, the first ventilation valve 12 is opened at the same time when the first valve 7, the second valve 8 and the first fan 10 are opened, the compressed air after rising the temperature fills the inner cavity of the sterilization cabin 1, and the original low-temperature and humid air in the cabin is blown out from the first ventilation valve 12, in addition, when the sterilization operation of the sterilization cabin 1 is completed, the residual hydrogen peroxide steam in the sterilization cabin 1 needs to be discharged, at this time, the low-dew-point compressed air dryer 5 is closed, and the output of the compressed air is stopped, when the first fan 10 blows all the compressed air in the sterilization circulation pipeline into the sterilization cabin 1, the preheater 4 and the flash evaporator 2 are closed to stop the generation of hydrogen peroxide steam, finally, the first valve 7 and the second valve 8 are closed to separate the communication between the sterilization circulation pipeline and the inner cavity of the sterilization cabin 1, and the sterilization operation is ended. The third valve 9 and the second ventilation valve 13 are opened, the ventilation pipeline, the sterilization cabin 1 and the external environment are communicated, the second fan 11 and the third fan 21 are started, the second fan 11 sucks the clean air from the external environment into the sterilization cabin 1, the residual hydrogen peroxide steam is discharged to the second ventilation valve 13, and the third fan 21 discharges the hydrogen peroxide steam from the sterilization cabin 1, so that the residual hydrogen peroxide steam is prevented from being inhaled by the user.

[0028] It should be noted that the specific dew point of the compressed air generated by the low-dew-point compressed air dryer 5 is less than or equal to-20℃, that is, the generated compressed air is more dry, the air pressure range of the compressed air is 0.4~0.7Mpa, and the specific parameters of the compressed air can be adjusted according to the use environment, so that the hydrogen peroxide content carried by the compressed air is higher, and the hydrogen peroxide steam transported to the sterilization cabin has better sterilization effect.

[0029] Preferably, a metering pump 14 is arranged in the flash evaporator 2 and the storage tank 3, the metering pump 14 controls the flow of hydrogen peroxide drawn by the flash evaporator 2, and ensures high sterilization efficiency of the hydrogen peroxide steam generated by the flash evaporator 2, and a weighing device 15 is arranged at the bottom of the storage tank 3, the weighing device 15 and the metering pump 14 are both signal connected with the control system 6, the control system 6 receives the flow signal fed back by the metering pump 14, calculates the weight of the hydrogen peroxide drawn by the metering pump 14 according to the density of the hydrogen peroxide, and compares the signal change amount of the weighing device 15, if the difference between the calculated weight of the hydrogen peroxide and the signal change amount of the weighing device 15 exceeds the preset range, the control system 6 judges that the hydrogen peroxide solution in the storage tank 3 is insufficient or the metering pump 14 is malfunctioning, and the control system 6 is also connected with a warning device, the operation of the warning device prompts the user to check and repair.

[0030] Preferably, a heat preservation sleeve 16 is arranged outside the sterilization cabin 1, the heat preservation sleeve 16 can block the heat exchange between the sterilization cabin 1 and the external environment, and heat the sterilization cabin 1 to maintain the temperature in the sterilization cabin 1, and further, a heating window 17 is arranged on the side wall of the sterilization cabin 1, the heating window 17 provides lighting function while heating the glass in the window, and cooperates with the heat preservation sleeve 16 to maintain the temperature in the sterilization cabin 1.

[0031] In addition, the sterilization cabin 1 is provided with a temperature sensor 18, a humidity sensor 19 and a concentration sensor 20, and the temperature sensor 18, the humidity sensor 19 and the concentration sensor 20 are connected with the control system signal, wherein the temperature sensor 18 detects the temperature of the air in the sterilization cabin 1, the humidity sensor 19 detects the relative humidity and the relative mixing humidity of the air in the sterilization cabin 1, and the concentration sensor 20 detects the concentration of hydrogen peroxide vapor in the sterilization cabin 1. In an embodiment of the present application, the hydrogen peroxide anti-condensation device performs sterilization operation, the flash evaporator 2 generates hydrogen peroxide vapor, and the hydrogen peroxide vapor is blown into the sterilization cabin 1 by the first air blower 10. The concentration sensor 20 detects the concentration of hydrogen peroxide vapor in the sterilization cabin 1 in real time. When the concentration of hydrogen peroxide reaches the maximum value of the preset range, the control system 6 controls the metering pump 14 to be closed, and the flash evaporator 2 cannot extract hydrogen peroxide solution. Then, the flash evaporator 2 is closed, and the low-dew-point compressed air dryer 5 and the preheater 4 continue to run to blow high-temperature dry compressed air into the sterilization cabin 1. While maintaining the temperature in the sterilization cabin 1, the humidity and the concentration of hydrogen peroxide vapor in the sterilization cabin 1 are reduced. When the concentration sensor 20 detects that the concentration of hydrogen peroxide vapor reaches the minimum value of the preset range, the control system 6 controls the metering pump 14 and the flash evaporator 2 to be started. The flash evaporator 2 continues to generate hydrogen peroxide vapor to sterilize the cavity in the sterilization cabin 1 until the sterilization operation is completed. In another embodiment of the present application, when the humidity sensor 19 detects that the relative humidity and the relative mixing humidity in the sterilization cabin 1 are high, the hydrogen peroxide vapor is prone to condensation. At this time, the control system 6 closes the metering pump 14 and the flash evaporator 2, and the low-dew-point compressed air dryer 5 and the preheater 4 continue to run to blow high-temperature dry compressed air into the sterilization cabin 1 to perform dehumidification operation. When the humidity sensor 19 detects that the humidity in the sterilization cabin 1 reaches the preset range, the metering pump 14 and the flash evaporator 2 are started again to continue the sterilization operation.

[0032] It should be noted that the relational terms herein such as first and second are used only to differentiate one entity from another entity, and do not necessarily require or imply that there is any such actual relationship or order between these entities.

[0033] The principle and implementation mode of the present application are described by using specific examples in the present application. The above description of the embodiments is only used to help understand the method and the core idea of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the principle of the present application, the present application can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A hydrogen peroxide anti-condensation device, characterized by, The application relates to a sterilization cabin (1) which comprises a sterilization circulating pipeline, a flash evaporator (2) arranged in the sterilization circulating pipeline, a storage barrel (3) connected with the flash evaporator (2), and the flash evaporator (2) is used for extracting hydrogen peroxide solution in the storage barrel (3). A preheater (4) which is communicated with a low-dew-point compressed air dryer (5), the preheater (4) receives and heats compressed gas generated by the low-dew-point compressed air dryer (5), the preheater (4) is communicated with the flash evaporator (2), and the compressed gas assists the flash evaporator (2) to generate hydrogen peroxide vapor. A control system (6) which is signal-connected with the preheater (4), the flash evaporator (2) and the low-dew-point compressed air dryer (5), and is used for controlling the start and stop of the preheater (4), the flash evaporator (2) and the low-dew-point compressed air dryer (5), so that the sterilization cabin (1) can carry out dehumidification and temperature rising and sterilization operation. The preheater (4) is connected with the low-dew-point compressed air dryer (5) through a first valve (7) and a first fan (10), the flash evaporator (2) is arranged between the sterilization cabin (1) and the inner cavity of the sterilization cabin (1) through a second valve (8), and after the control system (6) opens the first valve (7) and the second valve (8), the first fan (10) blows the compressed gas generated by the low-dew-point compressed air dryer (5) into the preheater (4).

2. The hydrogen peroxide anti-condensation device of claim 1, wherein, The sterilization cabin (1) is provided with a ventilation pipeline and a ventilation window, the ventilation pipeline is provided with a second fan (11) and a third valve (9), the ventilation window is provided with a first ventilation valve (12) and a second ventilation valve (13) which are connected in parallel, and the first ventilation valve (12) and the second ventilation valve (13) are communicated with a third fan (21).

3. The hydrogen peroxide anti-condensation device of claim 2, wherein, The flash evaporator (2) is connected with the storage barrel (3) through a metering pump (14), and the metering pump (14) controls the volume of hydrogen peroxide solution extracted by the flash evaporator (2).

4. The hydrogen peroxide anti-condensation device of claim 3, wherein, The sterilization circulating pipeline and the ventilation pipeline are not communicated with each other, the first valve (7), the second valve (8) and the first ventilation valve (12) are opened, and the first fan (10) operates when dehumidification, temperature rising and sterilization operation is carried out.

5. The hydrogen peroxide anti-condensation device of claim 4, wherein, The third valve (9) and the second ventilation valve (13) are opened, and the second fan (11) and the third fan (21) operate when ventilation operation is carried out. The sterilization cabin (1) is provided with a temperature sensor (18), a humidity sensor (19) and a concentration sensor (20) which are signal-connected with the control system (6), and the control system (6) is used for detecting the temperature, relative humidity, relative mixing humidity and hydrogen peroxide concentration in the sterilization cabin (1).

6. The hydrogen peroxide anti-condensation device of claim 5, wherein, The bottom surface of the storage barrel (3) is provided with a weighing device (15), the control system (6) is signal-connected with the weighing device (15) and the metering pump (14), and the control system (6) is used for detecting whether the amount of hydrogen peroxide in the storage barrel (3) is insufficient or whether the metering pump (14) and the storage barrel (3) are damaged.

7. The hydrogen peroxide anti-condensation device of claim 4, wherein, ​ 8. The hydrogen peroxide anti-condensation device of claim 1, wherein, The periphery of the sterilization cabin (1) is provided with a heat preservation sleeve (16), and a heating window (17) is arranged on the side wall of the sterilization cabin (1), and the heat preservation sleeve (16) and the heating window (17) are used for adjusting the temperature in the sterilization cabin (1).

9. The hydrogen peroxide anti-condensation device of claim 2, wherein, The low-dew-point compressed air dryer (5) outputs the compressed air with a dew point less than or equal to-20 DEG C and a pressure ranging from 0.4 to 0.7 MPa.

Images