CN114229953A - Cavity type ultraviolet sterilizer and ultraviolet dose calculation method thereof - Google Patents
Cavity type ultraviolet sterilizer and ultraviolet dose calculation method thereof Download PDFInfo
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- 238000004364 calculation method Methods 0.000 title claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000002835 absorbance Methods 0.000 claims description 6
- 239000003651 drinking water Substances 0.000 claims description 6
- 235000020188 drinking water Nutrition 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 5
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 15
- 238000013461 design Methods 0.000 abstract description 5
- 230000001954 sterilising effect Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004590 computer program Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
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- 230000003287 optical effect Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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Abstract
The invention provides a cavity type ultraviolet sterilizer and an ultraviolet dose calculation method thereof, wherein the cavity type ultraviolet sterilizer comprises: an ultraviolet lamp for emitting ultraviolet rays; a sleeve for housing and protecting the ultraviolet lamp; and a chamber having a cavity for receiving the cannula and allowing the substance to be sterilized to flow therethrough to perform ultraviolet sterilization of the substance to be sterilized by ultraviolet rays, wherein the ultraviolet dose at any position in the cavity is calculated using a given formula. According to the ultraviolet dose calculation method of the cavity type ultraviolet sterilizer, the ultraviolet dose received by any point in the cavity can be specifically quantized, and main reference is provided for the performance design of the cavity type ultraviolet sterilizer.
Description
Technical Field
The application relates to the technical field of ultraviolet disinfection, in particular to an ultraviolet dose calculation method of a cavity type ultraviolet disinfector and the cavity type ultraviolet disinfector.
Background
Ultraviolet disinfection is widely used as a green and safe disinfection mode. The principle is that the ultraviolet rays emitted by the ultraviolet lamp tube destroy the related molecular structures of microbial cells such as bacteria and the like, thereby achieving the purposes of disinfection and sterilization. The whole disinfection effect of the sterilizer can be directly influenced by the amount of the ultraviolet dose, the ultraviolet intensity of the reaction cavity is not uniformly distributed, so that the ultraviolet dose cannot be directly measured, and visual evaluation basis is lacked in the design of the ultraviolet sterilizer. Finally, the performance of the sterilizer is uneven, the sterilization requirements cannot be met due to insufficient ultraviolet dose, and energy consumption is wasted due to excessive ultraviolet dose. The invention provides a calculation method of ultraviolet dose, which can specifically quantify the ultraviolet dose received by any point in a cavity and provides a main reference for the performance design of an ultraviolet sterilizer.
Disclosure of Invention
The application aims to provide an ultraviolet dose calculation method of a cavity type ultraviolet sterilizer and the cavity type ultraviolet sterilizer, which can specifically quantify the ultraviolet dose received by any point in a cavity and provide a main reference for the performance design of the ultraviolet sterilizer.
The purpose of the application is realized by adopting the following technical scheme:
in a first aspect, the application provides a method for calculating ultraviolet dose of a cavity type ultraviolet sterilizer,
the cavity type ultraviolet sterilizer comprises:
an ultraviolet lamp for emitting ultraviolet rays;
a sleeve for receiving and protecting the ultraviolet lamp; and
a chamber having a cavity for receiving the cannula and through which a substance to be disinfected flows to ultraviolet disinfect the substance by ultraviolet light emitted from the ultraviolet lamp,
wherein the ultraviolet dose D is received at any position in the chamber at a distance D from the outer surface of the cannuladCalculated from the following formula (7):
Dd＝Id×t (7)
in the formula (7), t represents an ultraviolet irradiation time in seconds, IdDenotes the intensity of ultraviolet light received at the arbitrary position, and t and IdEach calculated by the following formulae (8) and (6):
in the formula (8), L represents an effective length of the ultraviolet lamp irradiation in unitIs meters, v represents the flow velocity of the substance to be disinfected in meters per second in the chamber, S represents the cross-sectional area of the chamber in square meters,
represents the flow rate of the substance to be disinfected in cubic meters per second in the chamber, and
in formula (6), AdDenotes the absorbance of the substance to be disinfected to ultraviolet rays, IgThe ultraviolet light intensity of the surface of the sleeve is expressed in watts per square meter.
The technical scheme has the beneficial effect that the ultraviolet dose received by any point in the cavity (except the sleeve) can be specifically quantified.
In some optional embodiments, the ultraviolet light intensity I of the surface of the sleevegCalculated from the following formula (2):
Ig＝τ×I0 (2)
in formula (2), τ represents the transmittance of the sleeve to ultraviolet rays, and I0The ultraviolet light intensity of the outer surface of the ultraviolet lamp is expressed in watts per square meter.
The technical scheme has the advantages that the sleeve materials and the process are different, the transmissivity of ultraviolet rays is different, and the ultraviolet dose received by any point in the cavity (outside the sleeve) can be accurately and specifically quantified based on the different transmissivity of different sleeves to the ultraviolet rays.
In some optional embodiments, the ultraviolet light intensity I of the outer surface of the ultraviolet lamp0Calculated from the following formula (1):
in the formula (1), etaUVRepresents the effective power conversion efficiency of the ultraviolet lamp, P represents the rated input power of the ultraviolet lamp in watts, D represents the diameter of the ultraviolet lamp in meters.
The technical scheme has the beneficial effects that the ultraviolet illumination intensity of the outer surface of the ultraviolet lamp can be determined by the effective power conversion efficiency, the rated input power and the diameter of the ultraviolet lamp, so that the ultraviolet dose received by any point in the cavity (except the sleeve) can be more simply and specifically quantified.
In some optional embodiments, the ultraviolet lamp emits ultraviolet light having a wavelength of 254 nm.
The technical scheme has the beneficial effects that the ultraviolet rays with the wavelength of 254 nanometers are selected, and compared with ultraviolet rays with shorter or longer wavelength, the sterilization effect is better. In particular, a deep ultraviolet lamp of 254nm wavelength is commonly used in an ultraviolet sterilizer using a cold cathode tube (commonly called a mercury lamp). Bacteria and viruses are most sensitive to 254nm ultraviolet light and peak in the absorbed ultraviolet dose at this wavelength, and pathogenic bacteria and viruses can cause structural damage to DNA and RNA molecules after receiving a certain amount of germicidal ultraviolet light, thereby preventing viral and bacterial replication, so that the conventional ultraviolet disinfection lamp is generally selected from 254nm ultraviolet lamps.
In some optional embodiments, the substance to be disinfected is drinking water.
The beneficial effect of this technical scheme lies in, is applicable to and disinfects drinking water.
In a second aspect, the present application provides a chamber uv disinfector comprising:
an ultraviolet lamp for emitting ultraviolet rays;
a sleeve for receiving and protecting the ultraviolet lamp; and
a chamber having a cavity for receiving the cannula and through which a substance to be disinfected flows to ultraviolet disinfect the substance by ultraviolet light emitted from the ultraviolet lamp,
wherein the ultraviolet dose D is received at any position in the chamber at a distance D from the outer surface of the cannuladCalculated from the following formula (7):
Dd＝Id×t (7)
in the formula (7), t represents an ultraviolet irradiation time in seconds, IdRepresents the intensity of ultraviolet light received at any position within the chamber, and t and IdEach calculated by the following formulae (8) and (6):
in formula (8), L represents an effective length of irradiation of the ultraviolet lamp in meters, v represents a flow velocity of the substance to be sterilized in meters per second in the chamber, S represents a cross-sectional area of the chamber in square meters,
represents the flow rate of the substance to be disinfected in cubic meters per second in the chamber, and
in formula (6), AdDenotes the absorbance of the substance to be disinfected to ultraviolet rays, IgThe ultraviolet light intensity of the surface of the sleeve is expressed in watts per square meter.
In some optional embodiments, the ultraviolet light intensity I of the surface of the sleevegCalculated from the following formula (2):
Ig＝τ×I0 (2)
in formula (2), τ represents the transmittance of the sleeve to ultraviolet rays, and I0The ultraviolet light intensity of the outer surface of the ultraviolet lamp is expressed in watts per square meter.
In some optional embodiments, the ultraviolet light intensity I of the outer surface of the ultraviolet lamp0Calculated from the following formula (1):
in the formula (1), etaUVRepresents the effective power conversion efficiency of the ultraviolet lamp, P represents the rated input power of the ultraviolet lamp, unit watt, D represents the diameter of the ultraviolet lamp, and unit meter.
In some optional embodiments, the ultraviolet lamp emits ultraviolet light having a wavelength of 254 nm.
In some optional embodiments, the substance to be disinfected is drinking water.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic view of a chamber type UV sterilizer provided in an embodiment of the present application;
FIG. 2 is a schematic view of a UV lamp and sleeve of a chamber UV sterilizer provided in accordance with an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a program product for implementing the ultraviolet dose calculation method according to an embodiment of the present application.
Detailed Description
The present application is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the present application, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict.
One embodiment of the application provides an ultraviolet dose calculation method of a cavity type ultraviolet sterilizer and the cavity type ultraviolet sterilizer. Part of parameters in the calculation formula provided by the application conform to the setting mode of national standard GB/T32091-2015 ultraviolet dose testing method for ultraviolet water disinfection equipment, and the setting mode is slightly different from the standard meanings of corresponding parameters in physics and photometry, and the setting mode is reminded in advance.
As shown in fig. 1 and 2, the chamber type uv sterilizer 1 includes: an ultraviolet lamp 11, the ultraviolet lamp 11 for emitting ultraviolet rays; a sleeve 12, the sleeve 12 for accommodating and protecting the ultraviolet lamp 11; and a chamber 13, the chamber 13 having a chamber 14, the chamber 14 being used for accommodating the sleeve 12 and enabling the substance 2 to be disinfected to flow through the chamber 14, so as to disinfect the substance 2 to be disinfected by ultraviolet rays emitted by the ultraviolet lamp 11.
In one embodiment of the present application, the specific type of uv lamp 11 is not particularly limited, and for example, a uv lamp that produces a characteristic spectrum of mercury by exciting mercury atoms, and whose wavelength is 254nm, for example, may be selected. Of course, the wavelength of the ultraviolet light may not be limited in the present application. The uv light emitted from the uv lamp 11 is actually composed of a plurality of point light sources with the same intensity, so that the uv lamp can be regarded as a cylindrical light source. At this time, the illumination intensity I of the surface of the ultraviolet lamp0Can be expressed by the following formula:
in the formula (1), etaUVIndicating the effective power conversion efficiency of the uv lamp 11, P the rated input power of the uv lamp 11 in watts, D the diameter of the uv lamp 11 in meters, and L the effective length of the radiation from the uv lamp 11 (sometimes referred to as the effective arc length in practice) in meters.
It should be noted that the illumination intensity referred to in the present application refers to illumination intensity (also referred to as illuminance), and the measurement is performed on light receiving (receiving light), which is different from the measurement of the luminous intensity (called intensity or luminosity for short) of light emitting.
In one embodiment of the present application, there is no particular limitation on the type of the sleeve 12, and for example, a quartz sleeve commonly used in the art may be selected. When ultraviolet rays transmit through the quartz sleeve 12, part of the energy is absorbed, and at this time, the ultraviolet irradiation intensity I of the surface of the sleeve 12g(in watts per square meter) is calculated from the following formula (2):
Ig＝τ×I0 (2)
in the formula (2), τ represents the transmittance of the sleeve 12 to ultraviolet rays.
In the art, the final sterilization performance of a uv sterilizer depends on the uv dose, which is determined by the intensity of the light and the irradiation time, and can be calculated by the following formula (3):
UVD＝I0·t (3)
in formula (3), UVD represents the ultraviolet dose generated by the ultraviolet lamp 11 in joules per square meter, and t represents the ultraviolet irradiation time.
In the embodiment of the present application, the cavity 13 is not particularly limited, and for example, the hollow structure in fig. 1 may be employed. The chamber 14 is also not particularly limited in the present embodiment, but is preferably shaped to have a circular cross section, for example, and may be shaped to have a rectangular cross section. In one implementation, the chamber 14 is, for example, hollow and tubular, and the sleeve 12 may be located on the central axis of the chamber 14. In operation, the substance 2 to be sterilised fills the chamber 14 in the region outside the sleeve 12 when flowing through the chamber 14.
With continued reference to FIG. 1, in one embodiment of the present application, the average intensity of ultraviolet light I experienced at any location within the chamber 14 a distance d from the outer surface of the sleeve 12dCan be represented by the following formula (4):
in formula (4), TxIs the transmission of ultraviolet radiation by the substance 2 to be disinfected at any position within the chamber 14 at a distance d from the outer surface of the sleeve 12. In the embodiment of the present invention, the substance 2 to be sterilized is not particularly limited, and may be a fluid such as water, preferably drinking water. It will be appreciated that location refers to a point of location, and that there are an infinite number of points within the chamber 14 that are at a distance d from the outer surface of the sleeve 12, and that these points may together comprise a cylindrical surface.
On the other hand, transmittance TxAnd absorbance AxThe relationship of (A) is shown in the following formula (5):
Tx＝10-Ax (5)
in formula (5), A represents the absorbance of ultraviolet rays by the substance 2 to be sterilized in the chamber 14 in units of per centimeter (cm)-1) (the setting mode refers to national standard GB/T32091-2015).
By combining formula (4) and formula (5), the ultraviolet irradiation intensity I received by any position with a distance d from the outer surface of the sleeve 12 in the chamber 14 is obtaineddExpression (c):
it follows that the dose D of uv light received in the chamber 14 at any position at a distance D from the outer surface of the sleeve 12dCan be calculated from the following formula (7):
Dd＝Id×t (7)
in the formula (7), t represents the ultraviolet irradiation time in seconds.
On the other hand, the ultraviolet irradiation time t is related to the size of the chamber 14 and the flow rate (flow rate) of the substance 2 to be sterilized, and specifically, t can be calculated by the following formula (8):
in formula (8), L represents the effective length of irradiation of the ultraviolet lamp 11 in meters, v represents the flow rate of the substance to be disinfected in meters per second in the chamber, S represents the cross-sectional area of the chamber in square meters,
representing the flow rate of the substance to be disinfected in cubic meters per second in the chamber.
According to the calculation method of the ultraviolet dose in the cavity type ultraviolet sterilizer and the cavity type ultraviolet sterilizer, the ultraviolet dose received by any point in the cavity can be specifically quantized, and main reference is provided for the performance design of the ultraviolet sterilizer.
The application provides cavity formula ultraviolet disinfector can be used for water supply system, and water supply system can include cistern, disinfection pipeline and secondary water supply equipment for example, and wherein the cistern inserts municipal pipe network, and secondary water supply equipment inserts the user pipe network, and the disinfection pipeline sets up between cistern and secondary water supply equipment, and cavity formula ultraviolet disinfector sets up in the disinfection pipeline.
Referring to fig. 3, an embodiment of the present application further provides an electronic device 200, where the electronic device 200 includes at least one memory 210, at least one processor 220, and a bus 230 connecting different platform systems.
The memory 210 may include readable media in the form of volatile memory, such as Random Access Memory (RAM)211 and/or cache memory 212, and may further include Read Only Memory (ROM) 213.
The memory 210 further stores a computer program, and the computer program can be executed by the processor 220, so that the processor 220 executes the steps of the method in the embodiment of the present application, and a specific implementation manner of the method is consistent with the implementation manner and the achieved technical effect described in the embodiment of the method, and a part of the content is not described again.
Accordingly, the processor 220 may execute the computer programs described above, and may execute the utility 214.
The electronic device 200 may also communicate with one or more external devices 240, such as a keyboard, pointing device, bluetooth device, etc., and may also communicate with one or more devices capable of interacting with the electronic device 200, and/or with any devices (e.g., routers, modems, etc.) that enable the electronic device 200 to communicate with one or more other computing devices. Such communication may be through input-output interface 250. Also, the electronic device 200 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet) via the network adapter 260. The network adapter 260 may communicate with other modules of the electronic device 200 via the bus 230. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 200, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage platforms, to name a few.
The embodiments of the present application further provide a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and when the computer program is executed, the steps of the method in the embodiments of the present application are implemented, and a specific implementation manner of the method is consistent with the implementation manner and the achieved technical effect described in the embodiments of the method, and some details are not repeated.
Fig. 4 shows a program product 300 provided by the present embodiment for implementing the method, which may employ a portable compact disc read only memory (CD-ROM) and include program codes, and may be run on a terminal device, such as a personal computer. However, the program product 300 of the present invention is not so limited, and in this application, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. Program product 300 may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable storage medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable storage medium may also be any readable medium that can communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. Program code embodied on a readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing. Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the C language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
While the present application is described in terms of various aspects, including exemplary embodiments, the principles of the invention should not be limited to the disclosed embodiments, but are also intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for calculating the ultraviolet dose of a cavity type ultraviolet sterilizer is characterized in that,
the cavity type ultraviolet sterilizer comprises:
an ultraviolet lamp for emitting ultraviolet rays;
a sleeve for receiving and protecting the ultraviolet lamp; and
a chamber having a cavity for receiving the cannula and through which a substance to be disinfected flows to ultraviolet disinfect the substance by ultraviolet light emitted from the ultraviolet lamp,
wherein the ultraviolet dose D is received at any position in the chamber at a distance D from the outer surface of the cannuladCalculated from the following formula (7):
Dd＝Id×t (7)
in the formula (7), t represents an ultraviolet irradiation time in seconds, IdDenotes the intensity of ultraviolet light received at the arbitrary position, and t and IdEach calculated by the following formulae (8) and (6):
in formula (8), L represents an effective length of irradiation of the ultraviolet lamp in meters, v represents a flow velocity of the substance to be sterilized in meters per second in the chamber, S represents a cross-sectional area of the chamber in square meters,
represents the flow rate of the substance to be disinfected in cubic meters per second in the chamber, and
in formula (6), A represents the absorbance of the substance to be sterilized to ultraviolet rays, IgThe ultraviolet light intensity of the surface of the sleeve is expressed in watts per square meter.
2. The ultraviolet dose calculation method of a chamber type ultraviolet sterilizer as claimed in claim 1, wherein the ultraviolet irradiation intensity I of the surface of said sleeve isgCalculated from the following formula (2):
Ig＝τ×I0 (2)
in formula (2), τ represents the transmittance of the sleeve to ultraviolet rays, and I0The ultraviolet light intensity of the outer surface of the ultraviolet lamp is expressed in watts per square meter.
3. The ultraviolet dose calculation method of a chamber type ultraviolet sterilizer as claimed in claim 2, wherein the ultraviolet illumination intensity I of the outer surface of the ultraviolet lamp0Calculated from the following formula (1):
in the formula (1), etaUVRepresents the effective power conversion efficiency of the ultraviolet lamp, P represents the rated input power of the ultraviolet lamp in watts, D represents the diameter of the ultraviolet lamp in meters.
4. The method for calculating the ultraviolet dose of a cavity type ultraviolet sterilizer as claimed in any one of claims 1 to 3, wherein the wavelength of the ultraviolet rays emitted from the ultraviolet lamp is 254 nm.
5. The method for calculating the ultraviolet dose of a cavity type ultraviolet sterilizer according to any one of claims 1 to 3, wherein the substance to be sterilized is drinking water.
6. A chamber type ultraviolet sterilizer is characterized by comprising:
an ultraviolet lamp for emitting ultraviolet rays;
a sleeve for receiving and protecting the ultraviolet lamp; and
a chamber having a cavity for receiving the cannula and through which a substance to be disinfected flows to ultraviolet disinfect the substance by ultraviolet light emitted from the ultraviolet lamp,
wherein the ultraviolet dose D is received at any position in the chamber at a distance D from the outer surface of the cannuladCalculated from the following formula (7):
Dd＝Id×t (7)
in the formula (7), t represents an ultraviolet irradiation time in seconds, IdDenotes the intensity of ultraviolet light received at the arbitrary position, and t and IdEach calculated by the following formulae (8) and (6):
in formula (8), L represents an effective length of irradiation of the ultraviolet lamp in meters, v represents a flow velocity of the substance to be sterilized in meters per second in the chamber, S represents a cross-sectional area of the chamber in square meters,
representing the flow of the substance to be sterilised in cubic meters per second in the chamberAnd is and
in formula (6), AdDenotes the absorbance of the substance to be disinfected to ultraviolet rays, IgThe ultraviolet light intensity of the surface of the sleeve is expressed in watts per square meter.
7. The chamber type UV sterilizer of claim 6, wherein the UV light intensity I of the sleeve surfacegCalculated from the following formula (2):
Ig＝τ×I0 (2)
in formula (2), τ represents the transmittance of the sleeve to ultraviolet rays, and I0The ultraviolet light intensity of the outer surface of the ultraviolet lamp is expressed in watts per square meter.
8. The chamber uv disinfector of claim 7, wherein the uv lamp has an outer surface with a uv light intensity I0Calculated from the following formula (1):
in the formula (1), etaUVRepresents the effective power conversion efficiency of the ultraviolet lamp, P represents the rated input power of the ultraviolet lamp in watts, D represents the diameter of the ultraviolet lamp in meters.
9. The chamber type ultraviolet sterilizer as claimed in any one of claims 6 to 8, wherein the ultraviolet lamp emits ultraviolet rays having a wavelength of 254 nm.
10. The cavity type ultraviolet sterilizer of any one of claims 6 to 8, wherein the substance to be sterilized is drinking water.
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| CN116062833A (en) * | 2023-01-10 | 2023-05-05 | 湖南普斯赛特光电科技有限公司 | Detection device and detection method for killing dosage required by UVC |
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| CN111943314A (en) * | 2020-08-29 | 2020-11-17 | 无锡诚源环境科技有限公司 | Cavity type ultraviolet sterilizer |
| CN212699745U (en) * | 2020-07-08 | 2021-03-16 | 李昌霖 | Ultraviolet sterilizer |
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