CN113108398A - Indoor ventilation method for medical laboratory - Google Patents

Indoor ventilation method for medical laboratory Download PDF

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Publication number
CN113108398A
CN113108398A CN202110427380.7A CN202110427380A CN113108398A CN 113108398 A CN113108398 A CN 113108398A CN 202110427380 A CN202110427380 A CN 202110427380A CN 113108398 A CN113108398 A CN 113108398A
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China
Prior art keywords
air
laboratory
formaldehyde
indoor
controlled
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CN202110427380.7A
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Chinese (zh)
Inventor
任修胜
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Zhengzhou Chaozhipeptide Biotechnology Co ltd
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Zhengzhou Chaozhipeptide Biotechnology Co ltd
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Priority to CN202110427380.7A priority Critical patent/CN113108398A/en
Publication of CN113108398A publication Critical patent/CN113108398A/en
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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • 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
    • F24F13/02—Ducting arrangements
    • 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
    • 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
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/76—Oxygen

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Ventilation (AREA)

Abstract

The invention provides an indoor ventilation method for a medical laboratory, which comprises the following steps: s1, obtaining the concentration of formaldehyde in the laboratory; s2, when the concentration of formaldehyde exceeds a preset value, the control device controls the exhaust system to carry out internal circulation; s3, the air purification device decomposes the formaldehyde in the gas, when the formaldehyde content in the laboratory is lower than the preset value, the first air pump is controlled to be closed, the gas in the laboratory is purified, and harmful substances in the gas in the laboratory can be removed by ventilating the gas in the laboratory, so that the cleanliness of the gas in the laboratory is guaranteed, and the health of internal laboratory experimenters is guaranteed.

Description

Indoor ventilation method for medical laboratory
Technical Field
The invention relates to the technical field of indoor ventilation, in particular to an indoor ventilation method for a medical laboratory.
Background
In medical institution or medical research institution, store the sample and carry out medical test in the medical laboratory, and to the storage of sample and medical test all need strict aseptic condition, consequently will set up the laboratory into airtight state, and long-time airtight leads to the inside control quality of laboratory poor, and the inside solution of laboratory still can produce the harmful gas of formaldehyde, is unfavorable for laboratory staff's healthy.
Disclosure of Invention
In view of the above problems, the present application provides an indoor ventilation method for a medical laboratory, which can ventilate the interior of the medical laboratory under the aseptic condition of the interior of the laboratory, ensure the quality of the gas inside the laboratory, and ensure the health of workers.
The invention provides an indoor ventilation method for a medical laboratory, which comprises the following steps:
s1, detecting the formaldehyde concentration in the room through a first formaldehyde sensor arranged in the laboratory;
s2, when the concentration of formaldehyde exceeds a preset value, the control device controls the exhaust system to perform internal circulation, namely, the electric control valve on the third air passage is controlled to be closed, the electric control valve on the second air passage is controlled to be opened, the first air pump is controlled to work, and the second air pump is controlled to be closed, so that indoor air enters from the first air inlet end and is conveyed to the air purification device through the second air passage, and then the purified air is discharged into the laboratory from the first air outlet end through the first air passage;
s3, the air purification device works to decompose formaldehyde in the gas, and when the content of the formaldehyde in the laboratory is lower than the preset value, the first air pump is controlled to be closed, so that the gas in the laboratory is purified.
Further, the air cleaning device is provided with a first oxygen sensor, and in the above S2, the method further includes S21, performing S3 when the oxygen concentration detected by the first oxygen sensor is higher than a predetermined threshold;
s22, when the oxygen concentration detected by the first oxygen sensor is lower than the predetermined threshold value, S4 is performed.
Further, S4 includes: the control device controls the electric control valve on the third air passage to be opened, the electric control valve on the second air passage to be closed, the first air pump and the second air pump are controlled to work, the indoor air and the outside form external circulation, the indoor air is pumped out of the room through the first air pump, the second air pump sucks the outdoor air through the first air inlet and conveys the outdoor air to the air purification device through the fourth air passage, the air is sterilized and disinfected through the air purification device, then the air is input into the laboratory through the first air outlet end, and after the indoor air is fully ventilated, the first air pump and the second air pump are controlled to stop working.
Further, the fully ventilating the room includes fully ventilating the room when the oxygen concentration in the room is equal to or greater than 20%.
Further, in S1, when the formaldehyde content inside the laboratory is lower than a predetermined value and the oxygen concentration inside the laboratory is lower than a predetermined threshold, the control proceeds to S22.
Furthermore, in order to ensure the ventilation effect of the ventilation method, the ventilation method further comprises an indoor ventilation system for the medical laboratory, the indoor ventilation system comprises a first air inlet end and a first air outlet end which are arranged inside the laboratory, and further comprises a gas replacement device, the gas replacement device comprises a shell, a first air outlet and a first air inlet which are arranged outdoors, and further comprises an air purification device arranged inside the shell, the air purification device comprises a second air inlet end and a second air outlet end, and the first air outlet end is communicated with the second air outlet end through a first air passage; the first air inlet end is communicated with the second air inlet end through the second air passage, the first air inlet end is further communicated with the first air outlet through the third air passage, the first air inlet is communicated with the second air inlet end through the fourth air passage, and the second air passage and the third air passage are both provided with electric control valves.
Further, the heat exchanger comprises a first heat exchange air passage and a second heat exchange air passage, wherein the first heat exchange air passage is arranged on the third air passage, and the second heat exchange air passage is arranged on the fourth air passage.
Preferably, the cross-sectional area of the first heat exchange air flue is s1, the internal gas flow rate is v1, the initial temperature of the gas in the first heat exchange air flue is T1, the cross-sectional area of the second heat exchange air flue is s2, the internal gas flow rate is v2, the initial temperature in the second heat exchange air flue is T2, and the heat conductivity coefficient E of the second heat exchange air flue is E; the heat exchange coefficient is c, the value range is 0.25-0.85, then: v1 ═ s1 ═ v2 ═ s 2| T1-T2 | _ c.
Furthermore, the shell comprises a first cavity and a second cavity which are arranged in a split mode, the heat exchanger and the air purification device are both arranged in the first cavity, two air pumps are arranged in the second cavity, the air inlet end of the first air pump is communicated with the first air inlet end, and the air outlet end of the first air pump is communicated with the air inlets of the second air passage and the third air passage; the second air pump is disposed between the first air inlet and the second heat exchanging air passage.
Further, the device also comprises a control device, at least one oxygen sensor and at least one first formaldehyde sensor arranged in the laboratory, wherein the control device is electrically connected with the oxygen sensor, the first formaldehyde sensor, the electric control valve, the first air pump and the second air pump.
Further, air purification device includes that the formaldehyde who gives vent to anger from second inlet end to second end and set gradually decomposes chamber, formaldehyde adsorption filter core, and oxygen sensor is including setting up the first oxygen sensor in air purification device.
Preferably, at least one second oxygen sensor is also provided inside the laboratory.
Preferably, the air purification device is also internally provided with a second formaldehyde sensor, the second formaldehyde sensor is arranged on one side of the formaldehyde adsorption filter element close to the second air outlet end, and the second formaldehyde sensor is electrically connected with the control device.
Preferably, an ionization chamber is further arranged on one side, close to the second air outlet end, of the formaldehyde adsorption filter element inside the air purification device, and a negative ion generator is arranged inside the ionization chamber.
Furthermore, the formaldehyde decomposition cavity comprises a titanium dioxide pore plate and an ultraviolet light source which are arranged inside the air purification device.
Furthermore, the first air inlet is also provided with a first air filtering device, and the first air filtering device is at least used for filtering micro-dust in the air.
Furthermore, a second gas filter element is arranged at the first gas outlet and is an activated carbon filter element.
The invention provides an indoor ventilation system for a medical laboratory, which integrates an air purification device and an air duct into a whole by arranging an air replacement device, and is directly connected with the inside and the outside of the laboratory to be communicated; through the arranged electric control valve, when the electric control valve on the third air passage is controlled to be opened and the electric control valve on the second air passage is controlled to be closed, the interior of the laboratory and the outside form external circulation, gas in the laboratory is discharged through the third air passage, fresh air is extracted from the outside through the third air passage and is purified, sterilized and filtered through the air purification device, the gas is ensured to be sterile, the requirement of the laboratory is met, and then the air is input into the laboratory through the fourth air passage, so that ventilation is completed; close, the electric control valve on the second air flue is opened through the electric control valve on the control third air flue to control first air inlet and not get into gas from the external world, thereby can form the inner loop with indoor air, carry out purification treatment through air purification device, the inside harmful substance of treated gas.
Secondly, it can be understood that, in summer and winter, the temperature difference between outdoor and indoor air is large, when the outside and the inside of the laboratory form an external circulation, the temperature of indoor air can be increased or decreased, and the indoor air conditioning system can consume more electric energy to adjust the temperature.
Secondly, in order to ensure the heat exchange efficiency of the first heat exchange air passage and the second heat exchange air passage, the cross sectional area of the first heat exchange air passage is s1, the flow rate of the gas inside the first heat exchange air passage is v1, the initial temperature of the gas inside the first heat exchange air passage is T1, the cross sectional area of the second heat exchange air passage is s2, the flow rate of the gas inside the second heat exchange air passage is v2, the initial temperature inside the second heat exchange air passage is T2, and the heat conductivity coefficient E of the second heat exchange air passage is E; the heat exchange coefficient is c, the value range is 0.25-0.85, then: v1 ═ s1 ═ v2 ═ s 2| T1-T2 | _ c.
Secondly, through setting up controlling means, oxygen sensor, set up first formaldehyde sensor indoor, can be through controlling ventilation system's switching according to indoor oxygen content and formaldehyde content to select outdoor circulation or indoor circulation, realize intelligent control.
Secondly, can detect the inside concentration through the formaldehyde after purifying of air purification device through set up second formaldehyde sensor in air purification device to can monitor air purification device's operating condition according to formaldehyde concentration.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a gas replacement device in an indoor ventilation system for a medical laboratory according to the present invention.
Fig. 2 is a schematic control diagram of an indoor ventilation system for a medical laboratory according to the present invention.
Fig. 3 is a schematic flow chart of an indoor ventilation method for a medical laboratory according to the present invention.
Fig. 4 is a schematic diagram illustrating an internal structure of a gas replacement device in an indoor ventilation system for a medical laboratory according to the present invention.
Fig. 5 is a schematic view of an internal structure of a heat exchanging device in an indoor ventilation system for a medical laboratory according to the present invention.
Fig. 6 is a schematic view of an internal structure of an air purification apparatus in an indoor ventilation system for a medical laboratory according to the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
The invention provides a method for indoor ventilation for a medical laboratory, and as a specific embodiment, with reference to fig. 3, the method comprises the following steps:
s1, detecting the formaldehyde concentration in the room by the first formaldehyde sensor 101 provided inside the laboratory;
s2, when the concentration of formaldehyde exceeds a predetermined value, the control device 100 controls the exhaust system to perform internal circulation, that is, the electric control valve 51 on the third air duct 43 is controlled to be closed, the electric control valve 51 on the second air duct 42 is controlled to be opened, the first air pump 71 is controlled to operate, and the second air pump 72 is controlled to be closed, so that indoor air can enter from the first air inlet end 1 and pass through the second air duct 42 to deliver air to the air purification device 33, and then the first air duct 41 discharges the purified air from the first air outlet end 2 into the laboratory;
s3, the air purification device 33 is operated to decompose formaldehyde in the gas, and when the formaldehyde content in the laboratory is lower than the predetermined value, the first air pump 71 is controlled to be closed, thereby completing the purification of the gas in the laboratory.
Typically, formaldehyde levels of 0.08 milligrams per cubic meter are harmful to the body, and therefore the predetermined value is selected to be 0.08 milligrams per cubic meter.
In the internal circulation process, it can be understood that the oxygen concentration of the human body is preferably 19.5% -23.5%, and when the oxygen concentration in the air is lower than 19%, the working efficiency of the human body is reduced, which may cause problems in the head, lung and circulatory system for a long time; the oxygen content in the gas passing through the air purification device is detected through a first oxygen sensor 1010 arranged in the air purification device 33, when the oxygen concentration is lower than 19%, the oxygen content is fed back to a control device, the control device controls an electric control valve on a third air passage to be opened and an electric control valve on a second air passage to be closed, a first air pump and a second air pump are controlled to work, so that external circulation is formed between the indoor part and the external part, the indoor gas is pumped out of the room through the first air pump, the second air pump works to enable the outdoor air to enter from a first air inlet 32 and be conveyed to the air purification device through a fourth air passage, the air is sterilized and disinfected through the air purification device, and then the air is input into a laboratory through a first air outlet end 2, so that indoor air exchange is completed, and the indoor oxygen content is ensured; and when the indoor space is fully ventilated, the first air pump and the second air pump are controlled to stop working.
Further, the air cleaning device 33 is provided with a first oxygen sensor 1010, and in the above S2, the method further includes S21, performing S3 when the oxygen concentration detected by the first oxygen sensor is higher than a predetermined threshold;
s22, when the oxygen concentration detected by the first oxygen sensor is lower than the predetermined threshold value, S4 is performed.
Further, S4 includes: the control device 100 controls the electric control valve on the third air passage 43 to open, the electric control valve on the second air passage 42 to close, controls the first air pump 71 and the second air pump 72 to work, so that the indoor and the external form an external circulation, the indoor air is pumped out of the room through the first air pump 71, the second air pump 72 sucks the outdoor air through the first air inlet 32 and conveys the outdoor air to the air purification device 33 through the fourth air passage 44, the air is sterilized and disinfected through the air purification device 33 and then is input into the laboratory through the first air outlet end 2, and after the indoor air is fully ventilated, the first air pump and the second air pump are controlled to stop working.
Further, the fully ventilating the room includes fully ventilating the room when the oxygen concentration in the room is equal to or greater than 20%.
Further, in S1, when the formaldehyde content inside the laboratory is lower than a predetermined value and the oxygen concentration inside the laboratory is lower than a predetermined threshold, the control proceeds to S22.
Example two
The present invention further provides an indoor ventilation system for a medical laboratory, and referring to fig. 1-2, 4-6, as a specific embodiment, the ventilation system comprises a first air inlet end 1 and a first air outlet end 2 arranged inside the laboratory, and further comprises a gas replacement device 3, the gas replacement device 3 comprises a housing 30, and a first air outlet 31 and a first air inlet 32 arranged outside the laboratory, and further comprises an air purification device 33 arranged inside the housing 30, the air purification device 33 comprises a second air inlet end 330 and a second air outlet end 331, the first air outlet end 2 is communicated with the second air outlet end 331 through a first air passage 41; the first air inlet end 1 is communicated with the second air inlet end 330 through the second air passage 42, the first air inlet end 1 is also communicated with the first air outlet 31 through the third air passage 43, the first air inlet 32 is communicated with the second air inlet end 330 through the fourth air passage 44, and the second air passage 42 and the third air passage 43 are both provided with an electric control valve 5.
The air purification device and the air duct are integrated into a whole by arranging the air replacement device, and the air replacement device is directly connected with the inside and the outside of a laboratory and communicated with the inside and the outside of the laboratory; through the arranged electric control valve, when the electric control valve on the third air passage is controlled to be opened and the electric control valve on the second air passage is controlled to be closed, the interior of the laboratory and the outside form external circulation, gas in the laboratory is discharged through the third air passage, fresh air is extracted from the outside through the third air passage and is purified, sterilized and filtered through the air purification device, the gas is ensured to be sterile, the requirement of the laboratory is met, and then the air is input into the laboratory through the fourth air passage, so that ventilation is completed; close, the electric control valve on the second air flue is opened through the electric control valve on the control third air flue to control first air inlet and not get into gas from the external world, thereby can form the inner loop with indoor air, carry out purification treatment through air purification device, the inside harmful substance of treated gas.
Further, referring to fig. 1 and 5, as a preferred embodiment, the system further includes a heat exchanger 6, wherein the heat exchanger 6 includes a first heat exchanging air passage 61 and a second heat exchanging air passage 62, the first heat exchanging air passage 61 is disposed on the third air passage 43, and the second heat exchanging air passage 62 is disposed on the fourth air passage 44. Secondly, it can be understood that, in summer and winter, the temperature difference between outdoor and indoor air is large, when the outside and the inside of the laboratory form an external circulation, the temperature of indoor air can be increased or decreased, and the indoor air conditioning system can consume more electric energy to adjust the temperature.
Preferably, the cross-sectional area of the first heat exchanging air duct 61 is s1, the internal gas flow rate is v1, the initial temperature of the gas inside the first heat exchanging air duct 61 is T1, the cross-sectional area of the second heat exchanging air duct is s2, the internal gas flow rate is v2, the initial temperature inside the second heat exchanging air duct is T2, and the heat conductivity coefficient of the second heat exchanging air duct is E; the heat exchange coefficient is c, the value range is 0.25-0.85, then: v1 ═ s1 ═ v2 ═ s 2| T1-T2 | _ c.
In order to ensure the heat exchange efficiency of the first heat exchange air flue 61 and the second heat exchange air flue 62, the cross-sectional area of the first heat exchange air flue 61 is s1, the internal gas flow rate is v1, the initial temperature of the gas inside the first heat exchange air flue 61 is T1, the cross-sectional area of the second heat exchange air flue is s2, the internal gas flow rate is v2, the initial temperature inside the second heat exchange air flue is T2, and the heat conductivity coefficient E of the second heat exchange air flue; the heat exchange coefficient is c, the value range is 0.25-0.85, then: v1 ═ s1 ═ v2 ═ s 2| T1-T2 | _ c.
Further, referring to fig. 1 and 4, the housing 30 includes a first cavity 301 and a second cavity 302 which are separately arranged, the heat exchanger 6 and the air purification device 33 are both arranged in the first cavity 301, and two air pumps are arranged in the second cavity 302, wherein an air inlet end of the first air pump 71 is communicated with the first air inlet end 1, and an air outlet end of the first air pump 71 is communicated with air inlets of the second air passage 42 and the third air passage 43; the second air pump 72 is disposed between the first air intake port 32 and the second heat exchanging air path 62. Because the air pump needs the heat dissipation at actual working process, need take a breath with the external world and cool off, separate the setting with heat exchanger, air purification device and air pump through this kind of setting mode to can set up heat exchanger and air purification device in sealed environment, guarantee its operational environment's cleanliness factor.
Further, referring to fig. 2, as a preferred embodiment, the system further includes a control device 100, at least one oxygen sensor, and at least one first formaldehyde sensor 101 disposed inside the laboratory, wherein the control device 100 is electrically connected to the oxygen sensor 101, the first formaldehyde sensor 101, the electrically controlled valve 5, the first air pump 71, and the second air pump 72. Through setting up controlling means, oxygen sensor, set up first formaldehyde sensor indoor, can be through controlling ventilation system's switching according to indoor oxygen content and formaldehyde content to select outdoor circulation or indoor circulation, realize intelligent control.
Further, referring to fig. 6, as a preferred embodiment, the air purification apparatus 33 includes a formaldehyde decomposition chamber 332 and a formaldehyde adsorption filter element 333 which are sequentially disposed from the second air inlet end 330 to the second air outlet end 331, and the oxygen sensor 101 includes a first oxygen sensor 1010 disposed in the air purification apparatus 33. Through this kind of mode of setting up, when air exchange system carries out the indoor circulation, gaseous formaldehyde can be decomposed to the formaldehyde through the formaldehyde decomposition chamber behind the photocatalyst board, then adsorb the air once more through formaldehyde adsorption filter core 333, guarantee the filter effect to formaldehyde in the gas, filter indoor formaldehyde, guarantee the inside operational environment in laboratory, thereby be favorable to experimenter's health, and can detect indoor gaseous oxygen concentration this moment through first oxygen sensor 1010, feed back to controlling means 100 when oxygen concentration is less than the predetermined value, controlling means control air exchange system switches to the extrinsic cycle mode.
When the ventilation system is in an external circulation mode, the outdoor air can sterilize the air through the ultraviolet lamp, and the air is guaranteed to accord with the sterile effect inside the laboratory.
Preferably, at least one second oxygen sensor 1011 is further provided inside the laboratory. The second oxygen sensor 1011 can be used for detecting the indoor oxygen content, and the ventilation system is controlled to be closed after the indoor oxygen content meets the requirement.
Preferably, referring to fig. 2 and 6, a second formaldehyde sensor 102 is further disposed inside the air purification device 33, the second formaldehyde sensor 102 is disposed on a side of the formaldehyde adsorption filter element 333 close to the second air outlet end 331, and the second formaldehyde sensor 102 is electrically connected to the control device 100. The second formaldehyde sensor is arranged in the air purification device, so that the concentration of the purified formaldehyde in the air purification device can be detected, the working condition of the air purification device can be monitored according to the concentration of the formaldehyde, when the detection value of the second formaldehyde sensor 102 exceeds a preset value, the fault of the air purification device is diagnosed, the fault is timely fed back to the control device 100, and the control device can give an alarm by triggering an alarm system.
Preferably, referring to fig. 6, an ionization chamber 334 is further disposed inside the air purification device 33 on a side of the formaldehyde adsorption filter element 333 close to the second air outlet end 331, and a negative ion generator 3340 is disposed inside the ionization chamber 334. Through setting up ionization chamber 334, can handle the gas that has spoken the purification through anion generator to improve laboratory inside gas quality, eliminate laboratory personnel tired out, improve work efficiency.
Further, referring to fig. 6, as a specific embodiment, the formaldehyde decomposition chamber 332 includes a titanium dioxide orifice plate 3320 and an ultraviolet light source 3321 disposed inside the air purification device 33. The formaldehyde adsorption filter element 333 can be composed of activated carbon and sponge which are stacked.
Further, as a preferred embodiment, the first air inlet 32 is further provided with a first air filtering device 81, and the first air filtering device 81 is at least used for filtering fine dust in the air, so as to ensure the cleanliness of the air entering the air replacement device 3 from the outside and reduce the maintenance cost.
Further, as a preferred embodiment, the first air outlet 31 is provided with a second gas filter 82, formaldehyde in the indoor air discharged from the first air outlet is adsorbed by the second gas filter, so that air pollution is avoided, and the second gas filter is an activated carbon filter.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (5)

1. A method of indoor ventilation for a medical laboratory, comprising the steps of:
s1, detecting the formaldehyde concentration in the room through a first formaldehyde sensor (101) arranged in the laboratory;
s2, when the concentration of formaldehyde exceeds a preset value, the control device (100) controls the exhaust system to perform internal circulation, namely the electric control valve (51) on the third air passage (43) is controlled to be closed, the electric control valve (51) on the second air passage (42) is controlled to be opened, the first air pump (71) is controlled to work, and the second air pump (72) is controlled to be closed, so that indoor air can enter from the first air inlet end 1 and pass through the second air passage 42 to be conveyed to the air purification device (33), and then the first air passage (41) discharges purified air from the first air outlet end (2) into the laboratory;
s3, the air purification device (33) works to decompose formaldehyde in the gas, and when the formaldehyde content in the laboratory is lower than the preset value, the first air pump (71) is controlled to be closed, so that the gas in the laboratory is purified.
2. A room ventilation method for medical laboratory according to claim 1, wherein the air cleaning apparatus (33) is provided with a first oxygen sensor (1010), and in the above S2, S21, when the oxygen concentration detected by the first oxygen sensor is higher than a predetermined threshold value, S3;
s22, when the oxygen concentration detected by the first oxygen sensor is lower than the predetermined threshold value, S4 is performed.
3. A method of indoor ventilation for a medical laboratory according to claim 2, wherein S4 includes: the control device (100) controls the electric control valve on the third air passage (43) to be opened, the electric control valve on the second air passage (42) to be closed, the first air pump (71) and the second air pump (72) are controlled to work, so that external circulation is formed between the indoor air and the external air, the indoor air is pumped out of the room through the first air pump (71), the second air pump (72) sucks the outdoor air from the first air inlet (32) and conveys the outdoor air to the air purification device (33) through the fourth air passage (44), the air is sterilized and disinfected through the air purification device (33), then the outdoor air is input into the laboratory through the first air outlet end (2), and after the indoor air is fully ventilated, the first air pump and the second air pump are controlled to stop working.
4. A method of ventilating a room in a medical laboratory according to claim 2, wherein the ventilating the room sufficiently includes ventilating the room sufficiently when an oxygen concentration in the room is 20% or more.
5. The indoor ventilation method for medical laboratory according to claim 1, wherein in S1, when the formaldehyde content inside the laboratory is lower than a predetermined value and the oxygen concentration inside the laboratory is lower than a predetermined threshold, the control performs S22.
CN202110427380.7A 2021-04-21 2021-04-21 Indoor ventilation method for medical laboratory Withdrawn CN113108398A (en)

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CN202110427380.7A CN113108398A (en) 2021-04-21 2021-04-21 Indoor ventilation method for medical laboratory

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Application publication date: 20210713