CN113007849A - Intelligent negative pressure air disinfection chemical treatment unit and control method - Google Patents
Intelligent negative pressure air disinfection chemical treatment unit and control method Download PDFInfo
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 230000001954 sterilising effect Effects 0.000 claims abstract description 48
- 238000000746 purification Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000011941 photocatalyst Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 230000002452 interceptive effect Effects 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000011217 control strategy Methods 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 6
- 241000700605 Viruses Species 0.000 abstract description 21
- 241000894006 Bacteria Species 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002147 killing effect Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 description 10
- 230000005855 radiation Effects 0.000 description 8
- 238000012993 chemical processing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 208000015181 infectious disease Diseases 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
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- 239000007789 gas Substances 0.000 description 3
- 206010011409 Cross infection Diseases 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 2
- 206010029803 Nosocomial infection Diseases 0.000 description 2
- 241000191940 Staphylococcus Species 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
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- 239000010407 anodic oxide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/12—Details or features not otherwise provided for transportable
- F24F2221/125—Details or features not otherwise provided for transportable mounted on wheels
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses an intelligent negative-pressure air sterilization chemical treatment unit and a control method, wherein the treatment unit comprises a cabinet shell, a multiple purification module, a sterilization module, a fan module and a control module are sequentially arranged in the cabinet shell, an air inlet is formed in the side surface opposite to one side of the multiple purification module, the sterilization module is arranged on the other side of the multiple purification module, the sterilization module and the fan module are respectively connected with the control module, the control module is also provided with a signal interface connected with an external air pressure detection sensor, and an air outlet for harmless emission is formed in the side surface opposite to the air outlet of the fan module; the effect is as follows: the device is characterized in that virus and bacteria are physically filtered and isolated through the multiple purification modules, chemical disinfection and killing of the virus are carried out through the combination of the multiple purification modules and the sterilization module, harmless treatment is achieved, and in the exhaust process, the pressure difference between the inside and the outside of a room is controlled in real time according to data of an external air pressure detection sensor, so that the room is kept in a negative pressure state; meanwhile, the scheme has the characteristics of quick installation time and motorized arrangement.
Description
Technical Field
The invention belongs to the technical field of air disinfection, and particularly relates to an intelligent negative-pressure air disinfection chemical treatment unit and a control method.
Background
The exhaust system that present hospital system set up mostly is centralized central air conditioning system, sets up at the bathroom more and be vertical system. When the exhaust fan of the bathroom is turned on, negative pressure is generated in the bathroom, and air in the vertical sewage main pipe can flow back to the bathroom through the floor drain. Assuming that the air in the recirculation process contains contaminated droplets in the sewer manifold, the droplets are then dispersed into the bathroom and drawn by the bathroom exhaust fan to the lighting wells between adjacent cells.
Therefore, under the environment with pollution sources, the independent harmless discharge of the room is particularly important for avoiding infection. When an epidemic situation occurs, the isolation of each room unit should be completed quickly, and particularly, the current toilet vertical exhaust system designed for each ward is unreasonable.
However, in some special cases, for example, areas such as temporary shelter in hospitals, hotel isolation rooms, and general wards, it is difficult to rapidly implement negative pressure modification and harmless emission treatment, and there is a risk of secondary pollution.
Therefore, a technical scheme is needed to be needed, which can rapidly and temporarily transform the normal pressure area into the negative pressure area, and perform harmless emission treatment to ensure that the polluted gas does not leak and meet the motorized arrangement characteristics.
Disclosure of Invention
In order to solve the above problems, the present invention provides an intelligent negative pressure air sterilization chemical processing unit and a control method thereof, which can rapidly and temporarily transform a normal pressure region into a negative pressure region and perform harmless emission processing.
In a first aspect: the utility model provides an intelligence negative pressure air disinfection chemical treatment unit, includes the case shell, be equipped with multiple purification module, sterilization module, fan module and control module in the case shell in proper order, one side institute of multiple purification module is equipped with the air intake to the side, the opposite side of multiple purification module is equipped with the sterilization module, sterilization module and fan module respectively with control module connects, control module still is equipped with the signal interface who is connected with outside atmospheric pressure detection sensor, the air outlet institute of fan module is equipped with the air exit that is used for carrying out innoxious emission to the side.
Preferably, the chassis shell is further provided with an interaction assembly connected with the control module.
Preferably, a cloud box used for communicating with a remote control end is further arranged in the case shell.
Preferably, the multiple purification modules comprise an activated carbon filter, a F9 medium-efficiency filter and a HEPA H13 high-efficiency filter which are arranged in sequence.
Preferably, the sterilization module comprises a photocatalyst and a plurality of ultraviolet lamps, and the ultraviolet lamps are arranged in a staggered manner.
Preferably, the control module comprises a controller, an intermediate relay and a contactor, the controller is respectively connected with the fan module, the interactive assembly and the cloud box, the controller is further connected with the contactor through the intermediate relay, and the contactor controls the power supply of each ultraviolet lamp.
In a second aspect: a control method of an intelligent negative-pressure air sterilization chemical treatment unit, which is applied to the intelligent negative-pressure air sterilization chemical treatment unit of the first aspect, and the method comprises the following steps:
acquiring a set negative pressure value and sensing data received by a signal interface; the negative pressure value is obtained by the operation of a user through an interactive component, and is updated according to the operation of the user;
starting the sterilization module to work, and controlling the fan module to work by the control module according to the set negative pressure value and the set sensing data, so that the outside air is discharged from the air outlet after being subjected to harmless treatment by the air inlet through the multiple purification module and the sterilization module in sequence;
and then displaying the working state and the real-time data of each current module through the interactive component.
Preferably, the controlling the fan module to work specifically includes:
when the system is started, after the maximum gear quickly reaches a set negative pressure value, the negative pressure is automatically controlled according to a preset control strategy; the control strategy is that the air speed is adjusted by the pressing force difference value in a preset interval pwm mode, so that the indoor temperature is kept within the allowable variation range of the set negative pressure value.
Preferably, the method further comprises:
the cloud box is connected with an external control end to realize remote control of the processing unit.
By adopting the technical scheme, the method has the following advantages: according to the intelligent negative-pressure air disinfection chemical treatment unit and the control method, virus and bacteria are physically filtered and isolated through the multiple purification modules, chemical disinfection and killing of the virus are carried out through the sterilization modules, harmless treatment is achieved, and in the exhaust process, the pressure difference between the inside and the outside of a room is controlled in real time according to data of an external air pressure detection sensor, so that the room is kept in a negative pressure state; meanwhile, the scheme has the characteristics of short installation time and satisfying motorized arrangement, is suitable for any areas of isolation wards, temporary shelter of hospitals, hotel isolation rooms, ordinary wards and the like, greatly reduces the concentration of bacteria and viruses around patients in the treatment process, and also plays a role in protecting doctors and nurses who implement rescue.
Drawings
Fig. 1 is an internal structure diagram of an intelligent negative-pressure air sterilization chemical treatment unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an external structure of an intelligent negative-pressure air sterilization chemical processing unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an application installation provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of the circuit connection of an intelligent negative pressure air sterilization chemical processing unit according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a control method for an intelligent negative pressure air sterilization chemical processing unit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a differential pressure control according to an embodiment of the present invention.
Description of reference numerals:
100-an air inlet; 111-24V DC power supply; 112-12V direct current power supply; 113-a controller; 114-an intermediate relay; 115-a contactor; 116-cloud box; 117-touch display screen; 118-a signal interface; 119-a power interface; 120-air outlet; 121-a cabinet shell; 122-a pulley; 123-cabinet display door; 124-ultraviolet ballast; 125-fan module; 126-sterilization module; 127-HEPA H13 high efficiency filter; 128-F9 medium effect filter; 129-activated carbon filter; 130-door lock; 131-case disinfection door; 132-micro differential pressure sensor.
Detailed Description
To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and the description herein does not mean that all the subject matter corresponding to the specific examples set forth in the embodiments is cited in the claims.
Referring to fig. 1 to 4, an intelligent negative pressure air sterilization chemical processing unit and a control method thereof include a housing 121, wherein a multiple purification module, a sterilization module 126, a blower module 125 and a control module are sequentially disposed in the housing 121, an air inlet 100 is disposed on a side opposite to one side of the multiple purification module, the sterilization module 126 is disposed on the other side of the multiple purification module, the sterilization module 126 and the blower module 125 are respectively connected to the control module, the control module is further provided with a signal interface 118 connected to an external air pressure detection sensor, and an air outlet 120 for harmless emission is disposed on a side opposite to an air outlet of the blower module 125; wherein, the air pressure detection sensor adopts a micro differential pressure sensor 132.
Specifically, a power supply system known to those skilled in the art is further disposed in the housing case 121 for providing a required power supply voltage for each electric device, and the power supply system includes a power supply interface 119 for connecting an external power supply, and a 24V dc power supply 111 and a 12V dc power supply 112 for power conversion;
further, to improve the maneuverability of the treatment assembly, to facilitate its movement to a location near an infection source or convenient for installation, the bottom of the housing also has pulleys 122.
As shown in FIG. 3, the area where the indoor person is less active can be selected, and the position of the air outlet where the duct connecting the air outlet 120 leads to the outdoor is selected, and the installation hole is needed to be placed on the outdoor side wall surface.
When in use, according to WS/T35428 standard, the ventilation frequency of the negative pressure isolation ward pollution area and the potential pollution area is preferably 10 times/h-15 times/h, and the per-capita fresh air volume is not less than 40m3H; the air exchange frequency of the clean area of the negative pressure isolation ward is preferably 610 times/h to 15 times/h, the temperature of the negative pressure isolation ward is preferably controlled at 20 ℃ to 26 ℃, and the relative humidity is preferably controlled at 30 percent to 70 percent.
The height is 2.6 meters according to the requirements of national wards. The product has a designed using area of 20 square meters. Therefore, the maximum ventilation rate set by the fan in the fan module 125 is 550m3/h。
Firstly, the micro differential pressure sensor is used for keeping the indoor relative outdoor constant at the differential pressure of-5 pa, -10pa, -15pa and-20 pa, so that the virus is isolated in a negative pressure ward while negative pressure is formed, and the cross infection of the ward is avoided; then, virus and bacteria are physically filtered and isolated through a multiple purification module;
in order to improve the filtering and isolating effects, the multiple purification modules comprise an activated carbon filter 129, an F9 medium-efficiency filter 128 and an HEPA H13 high-efficiency filter 127 which are sequentially arranged; wherein, the active carbon adsorbs toxic and harmful gases in the air; the medium-efficiency filter filters medium and large particles; the high efficiency (HEPA H13) filter filters micro-particles and microorganisms above 0.3 um;
furthermore, in order to realize chemical disinfection of indoor air; the sterilization module comprises a photocatalyst and a plurality of ultraviolet lamps which are arranged in a staggered manner; in implementation, a disinfection chamber is further arranged in the housing 121, the sterilization module is arranged in the disinfection chamber, the disinfection chamber is made of an anodic oxide mirror surface alumina material with high reflection performance (reflection efficiency of 80%), the distance between the ultraviolet lamp and the photocatalyst at two ends is a set value, the set value ranges from 120mm to 180mm, and the size of the disinfection chamber is 350 × 250 × 660 (unit: mm).
The product adopts high power (single 95W power, total 7, lamp tube size 530mm, set value 175mm, single ultraviolet lamp radiation intensity 250uw/cm2) And an anodic oxidized mirror surface alumina material with high reflection performance (reflection efficiency of 80%) is arranged, and chemical disinfection can be realized through the arrangement.
Specifically, the radiation intensity of a single ultraviolet lamp is 250uw/cm without considering the secondary reflection effect2(one meter away from the object), the material has 4 faces, one of which is covered by the base, so ignoring this face, the 3-face reflection is enhanced by a factor of 2.4.
E＝φ/π2*a2 (1)
E＝φ/2π*a*L (2)
Wherein E is the radiant quantity, phi is the radiant flux, a is the distance from the light source, and L is the length of the light source; and when a is larger than L, adopting a formula 1, and when a is smaller than L, adopting a formula 2.
The effective length L of the lamp tube is 530mm, and the known radiation quantity at 1 meter is 250uw/cm2I.e. E-250 uw/cm2And a is 1m, and phi radiation flux is 3.142 x 250 is 2465uw/cm obtained by reverse deduction according to the formula 12。
And (3) calculating the radiation intensity at 175mm (the distance between the ultraviolet lamp and the contact surfaces of the photocatalysts at the two ends), wherein the length of the lamp tube is 530mm, and a is less than 0.53 according to a formula 2.
E＝2465/2*3.14*0.175*0.53＝4232uw/cm2。
From the above, the total radiation intensity of the total design is (2.4+1) × 7 × 4232 ═ 100721uw/cm2。
The aforementioned recorded air output is 550m3The sectional area of the disinfection module is as follows: 66 × 25 ═ 1650cm2The speed through the disinfection module was found to be: 0.93 m/s.
The length of the disinfection channel is 0.35m, so the action time of the disinfection is 0.35/0.93 ≈ 0.376S.
The ultraviolet ray can kill common bacteria with radiation intensity of 30000 μm/cm2And (4) measuring.
TABLE 1 UV-light kill time for common bacteria
The theoretical radiation values in the cavity are: 100721uw/cm2The value required for the table above is 100721/30000 times 3.57. Corresponding to the effect time prolonged to 0.376 x 3.57 times 1.32S;
and under the action of photocatalyst, the decomposition efficiency of virus can be accelerated; therefore, the design value of the sterilization effect on natural strains such as escherichia coli, staphylococcus and virus meets the requirement.
Ultraviolet rays kill various microorganisms (viruses) in the air; the photocatalyst catalyzes and decomposes the virus to realize the high-efficiency virus killing effect, and then the air which is detoxified indoors is discharged outdoors through the fan.
Furthermore, in order to facilitate a user to check the working state and related operations of the processing unit, an interaction assembly connected with the control module is further arranged on the case shell.
Specifically, the casing 121 is provided with a split door, which includes a casing display door 123 and a casing disinfection door 131; the interaction component adopts a touch display screen 117, and the touch display screen 117 is arranged on the display door 123 of the case; a door lock 130 is arranged on the case disinfection door 131;
further, in order to facilitate the realization of remote control and improve the safety of related operators, a cloud box 116 for communicating with a remote control terminal is further arranged in the housing.
Specifically, the remote control end comprises a mobile phone end and a computer end;
further, in order to realize intelligent control of each module, the control module includes a controller 113, an intermediate relay 114 and a contactor 115, the controller 113 is respectively connected with the fan module 125, the interactive component and the cloud box 116, the controller 113 is further connected with the contact 115 through the intermediate relay 114, and the contactor 115 controls power supply of each ultraviolet lamp; the cloud box 116 and the touch display screen 117 are respectively connected with the controller 113 through communication ports; the communication port may be a serial port, which is only an example and is not limited thereto, and the controller 113 and the fan module 125 are controlled in a PWM manner; the controller 113 may adopt a PLC, which is integrated with an analog quantity, a digital quantity and a communication port; in the above embodiment, the detection sensor is only the micro differential pressure sensor 132; in other embodiments, on the basis of the above technical solution, the detection sensor further includes a temperature and humidity sensor and a TVOC sensor.
The implementation of the technical scheme has the following advantages:
1. the indoor and outdoor pressure difference is intelligently controlled to be between-5 pa and-20 pa, the ultraviolet intensity is controlled, the stay time of the virus in the disposable disinfection cavity is prolonged, the virus is efficiently disinfected and killed by the ultraviolet and the photocatalyst, and finally, the virus is discharged outdoors without toxicity.
2. The real-time air pressure detection can automatically adjust the air exhaust volume of the fan and monitor the negative pressure value of the use environment.
3. Remote control and real-time state monitoring show, reduce exempt from isolation zone or negative pressure ward personnel to flow, remote operation can control, has reduced medical personnel's infection risk.
4. The installation time of the product is fast, satisfies the motorized arrangement.
5. The product can still move after the installation is finished, the product can be moved to the position near an infection source, harmful gas exhausted by a patient is quickly exhausted in the process of rescuing the patient of the infection source, the concentration of bacteria and viruses around the patient in the treatment process is greatly reduced, and the product can play a role in protecting doctors and nurses who are rescued
6. After the temporary transformation is carried out on a specific place, the recovery is simple, the machine can be flexibly installed in other required environments, and the use cost is reduced.
Referring to fig. 5, an embodiment of the present invention further provides a control method for an intelligent negative-pressure air sterilization chemical processing unit, which is applied to the intelligent negative-pressure air sterilization chemical processing unit, and the method includes:
s101, acquiring a set negative pressure value and sensing data received by a signal interface; the negative pressure value is obtained by the user through the operation of the interactive component, and is updated according to the operation of the user.
Specifically, during application, when the computer is started, initialization is firstly carried out to determine whether a fault exists; if the fault exists, displaying the corresponding fault code and fault prompt to the interactive component for display;
the negative pressure value of the embodiment comprises a plurality of set values of-5 pa/-10pa/-15pa/-20pa, and the sensing data comprises a plurality of detection data, such as pressure, temperature and humidity and TVOC; the foregoing is by way of example only, and is not intended as limiting; in other embodiments, the cloud box may be connected to an external control terminal to implement remote control of the processing unit, where the remote control includes operations such as power on, setting of a setting value, device monitoring, data monitoring, alarm monitoring, report management, video monitoring, project configuration, and maintenance.
Specifically, during remote connection, a user name and a password are input to carry out a platform, and two right levels of a user and a management account are set simultaneously, so that different control levels are realized; therefore, the hierarchical management is convenient, and the misoperation can be reduced.
And S102, starting the sterilization module to work, and controlling the fan module to work by the control module according to the set negative pressure value and the set sensing data, so that the outside air is discharged from the air outlet after being subjected to harmless treatment by the air inlet through the multiple purification module and the sterilization module in sequence.
Specifically, the sterilization module is arranged in the sterilization chamber, the sterilization chamber is made of an anodized mirror-surface aluminum oxide material with high reflection performance (reflection efficiency of 80%), the distance between the ultraviolet lamp and the photocatalyst at two ends is a set value, the set value ranges from 120mm to 180mm, and the size of the sterilization chamber is 350 × 250 × 660 (unit: mm). According to the demonstration of disinfection function in the embodiment of the device, the decomposition efficiency of virus is accelerated under the action of photocatalyst; therefore, the design value of the sterilization effect on natural strains such as escherichia coli, staphylococcus and virus meets the requirement.
Correspondingly, the work of the fan control module specifically comprises:
when the system is started, after the set negative pressure value is quickly reached according to the maximum gear, the automatic intelligent negative pressure control is carried out according to a preset control strategy; the control strategy is that the air speed is adjusted by the pressing force difference value in a preset interval pwm mode, so that the indoor pressure is maintained within an allowable variation range of a set negative pressure value; wherein the preset interval is 1%, and the allowable range is within-2 pa of the set negative pressure value; the display is constant and the slow jump display is not reached.
Namely:
-5Pa intelligent control, rapidly achieving and maintaining indoor and outdoor pressure difference to-5 Pa;
intelligent control of-10 Pa, and fast reaching and maintaining indoor and outdoor pressure difference at-10 Pa;
-15Pa intelligent control, rapidly achieving and maintaining indoor and outdoor pressure difference at-15 Pa;
and (4) intelligently controlling at-20 Pa, and quickly achieving and maintaining the indoor and outdoor pressure difference at-20 Pa.
And S103, displaying the working state and the real-time data of each current module through the interactive component.
Specifically, the interaction component adopts a touch display screen, and can display data of each sensor, various functional keys and the like.
The scheme physically filters and isolates virus and bacteria through the multiple purification modules, and then combines the sterilization modules to chemically kill the virus, so as to realize harmless treatment, and in the exhaust process, the pressure difference between the inside and the outside of a room is controlled in real time according to the data of an external air pressure detection sensor, so that the room is kept in a negative pressure state; meanwhile, the scheme has the characteristics of short installation time and satisfying motorized arrangement, is suitable for any areas of isolation wards, temporary shelter of hospitals, hotel isolation rooms, ordinary wards and the like, greatly reduces the concentration of bacteria and viruses around patients in the treatment process, and also plays a role in protecting doctors and nurses who implement rescue.
In another embodiment, on the basis of the above scheme, the method further comprises:
the control module carries out TOVC intelligent control according to the TOVC value, and specifically comprises the following steps:
tvoc 0 to 0.3, wherein in the Tvoc intelligent mode, the fan works at a duty ratio of 45%;
TVOC 0.31-0.6, during Tvoc intelligent mode, the fan works at 60% duty cycle;
TVOC is more than or equal to 0.61, and when in Tvoc intelligent mode, the fan works at the duty ratio of 60%.
The processing unit enters a screen-off mode if no operation is performed for a period of time after the processing unit is started, and only the starting key is lightened and is displayed in orange; wherein, the period of time can be selected to be 10 min; this minimizes unnecessary energy consumption.
Further, on the basis of the above scheme, the method further comprises:
performing self-disinfection treatment; when the machine is used for a period of time or the use environment is protected, the self-disinfection function can be started through the interaction assembly, so that the inner wall body and all parts of the machine can be disinfected.
Specifically, the processing unit is internally provided with a self-disinfection function, when the processing unit is self-disinfected, the fan is not started, the photocatalyst is taken down, and ultraviolet rays are used for disinfecting the inner wall and all parts of the processing unit.
Further, the method also comprises the step of carrying out linkage control when a plurality of processing units exist so as to realize gradient management of the pressure difference.
Specifically, referring to fig. 6, the pressure difference between adjacent communicated areas with different pollution levels is not less than 5Pa, therefore, the negative pressure gradient detection and control ranges set in the corridor, the buffer area, the ward and the toilet are as follows: -5pa/-10pa/-15pa/-20 pa; therefore, different units are responsible for controlling the pressure difference of corresponding areas and are independently controlled, and the risk of cross infection is avoided.
Finally, while the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (9)
1. The utility model provides an intelligence negative pressure air disinfection chemical treatment unit, includes the case shell, its characterized in that, be equipped with multiple purification module in the case shell in proper order, disinfect module, fan module and control module, one side institute of multiple purification module is equipped with the air intake to the side, the opposite side of multiple purification module is equipped with disinfect module, disinfect module and fan module respectively with control module connects, control module still is equipped with the signal interface who is connected with outside atmospheric pressure detection sensor, the air outlet institute of fan module is equipped with the air exit that is used for carrying out innoxious emission to the side.
2. The intelligent negative-pressure air sterilization chemical treatment unit according to claim 1, wherein the cabinet housing is further provided with an interaction component connected with the control module.
3. The intelligent negative-pressure air sterilization chemical treatment unit according to claim 2, wherein a cloud box for communicating with a remote control terminal is further arranged in the cabinet housing.
4. The intelligent negative-pressure air sterilization chemical treatment unit according to claim 1, wherein the multiple purification modules comprise an activated carbon filter, a F9 medium-efficiency filter and a HEPA H13 high-efficiency filter which are arranged in sequence.
5. The intelligent negative-pressure air sterilization chemical treatment unit according to claim 3, wherein the sterilization module comprises a photocatalyst and a plurality of ultraviolet lamps, and the ultraviolet lamps are arranged in a staggered manner.
6. The intelligent negative-pressure air sterilization chemical treatment unit according to claim 5, wherein the control module comprises a controller, an intermediate relay and a contactor, the controller is respectively connected with the fan module, the interactive component and the cloud box, the controller is further connected with the contactor through the intermediate relay, and the contactor controls the power supply of each ultraviolet lamp.
7. A control method of an intelligent negative-pressure air sterilization chemical treatment unit is applied to the intelligent negative-pressure air sterilization chemical treatment unit of claim 5, and the method comprises the following steps:
acquiring a set negative pressure value and sensing data received by a signal interface; the negative pressure value is obtained by the operation of a user through an interactive component, and is updated according to the operation of the user;
starting the sterilization module to work, and controlling the fan module to work by the control module according to the set negative pressure value and the set sensing data, so that the outside air is discharged from the air outlet after being subjected to harmless treatment by the air inlet through the multiple purification module and the sterilization module in sequence;
and then displaying the working state and the real-time data of each current module through the interactive component.
8. The control method of the intelligent negative-pressure air sterilization chemical treatment unit according to claim 7, wherein the controlling the fan module to work specifically comprises:
when the system is started, after the maximum gear quickly reaches a set negative pressure value, the negative pressure is automatically controlled according to a preset control strategy; the control strategy is that the air speed is adjusted by the pressing force difference value in a preset interval pwm mode, so that the indoor temperature is kept within the allowable variation range of the set negative pressure value.
9. The control method of the intelligent negative-pressure air sterilization chemical treatment unit according to claim 7, wherein the method further comprises:
the cloud box is connected with an external control end to realize remote control of the processing unit.
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