CN114543238A - Pollutant control system, air return device and control method thereof - Google Patents
Pollutant control system, air return device and control method thereof Download PDFInfo
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- CN114543238A CN114543238A CN202011357901.8A CN202011357901A CN114543238A CN 114543238 A CN114543238 A CN 114543238A CN 202011357901 A CN202011357901 A CN 202011357901A CN 114543238 A CN114543238 A CN 114543238A
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- 231100001243 air pollutant Toxicity 0.000 claims abstract description 64
- 239000000356 contaminant Substances 0.000 claims abstract description 43
- 238000009792 diffusion process Methods 0.000 claims abstract description 32
- 238000011109 contamination Methods 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 14
- 238000004887 air purification Methods 0.000 claims description 11
- 230000004630 mental health Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 16
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- 238000004140 cleaning Methods 0.000 description 9
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Classifications
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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
-
- 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
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
-
- 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
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
-
- 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
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
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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
- F24F7/007—Ventilation with forced flow
-
- 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
- F24F7/10—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 air supply, or exhaust, through perforated wall, floor or ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- 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
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Ventilation (AREA)
Abstract
A contaminant control system, an air return device and a control method thereof are provided which contribute to preventing or suppressing the influence of the diffusion of air contaminants in a subject space on the physical and mental health of a person in the subject space who is located on the diffusion path of the air contaminants by rapidly sucking the contaminants. The pollutant control system is used for controlling the diffusion of air pollutants in a target space, and comprises a return air device and a return air fan, wherein the return air device is provided with a return air inlet and a return air fan, the return air inlet is arranged at the lower part of the target space, and the return air fan runs at a preset rotating speed to suck the air in the target space through the return air inlet, so that the trend that the air pollutants in an area with the distance below a preset distance from the return air inlet are diffused upwards is inhibited.
Description
Technical Field
The present invention relates to a pollutant control system for controlling airborne pollutants in a target space. The present invention also relates to a return air device for drawing air pollutants in a target space. The invention also relates to a control method of the air return device.
Background
In the office of an office building, concentrated ventilation is mainly performed on a ceiling, and since an air flow blown from an air conditioner or a fresh air device reaches a concentrated ventilation port provided on the ceiling through a plurality of working positions in a space such as the office, if a contaminant is contained in the breath of one person in the space, cross-infection is likely to occur,
disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a pollutant control system, an air return device, and a control method thereof, which can help prevent or suppress the influence of the diffusion of air pollutants in a target space on the physical and mental health of a person in the target space located on the diffusion path of the air pollutants by rapidly sucking the pollutants.
In order to achieve the above object, the present invention provides a pollutant control system for controlling air pollutants in a target space, comprising a return air device having a return air inlet provided at a lower portion of the target space and a return air fan operating at a predetermined rotation speed to suck air in the target space through the return air inlet, thereby suppressing a tendency of air pollutants in a region (corresponding to an effective suction region of the return air device) having a distance below a predetermined distance from the return air inlet to diffuse upward.
Here, the "air pollutants" may be dust particles, CO2Harmful gases (e.g., formaldehyde, TVOC), viruses and bacteria, etc.; and, the "lower part of the object space" includes the bottom of the object space; also, the "preset rotation speed" may be set, for example, to the rotation speed of a motor that drives the return air fan; also, the "preset distance" may be set corresponding to a specific pollutant generation source within the target space.
The pollutant control system according to the present invention comprises a return air device having a return air inlet and a return air fan, the return air inlet being provided at a lower portion of an object space, the return air fan being operated at a predetermined rotational speed to suck air in the object space through the return air inlet, thereby suppressing a tendency of air pollutants in an area having a distance below a predetermined distance from the return air inlet to diffuse upward, and therefore, by only providing the return air device at the lower portion of the object space and operating the return air device at the predetermined rotational speed, a diffusion path of the air pollutants in the area below the predetermined distance can be controlled to flow entirely downward, so that the air pollutants are rapidly sucked by the return air device, thereby preventing the air pollutants from diffusing all around, whereby, for example, when a person in the object space exhales a pollutant-containing gas, it is easy to prevent or suppress the diffusion of the pollutants to the entire object space due to the diffusion of the pollutants upward in the object space And influences the physical and psychological health of people in the target space and positioned on the air pollutant diffusion path.
Further, in the contaminant control system of the present invention, it is preferable that the return air device has a housing having the return air inlet, and the return air fan is provided in the housing.
Of course, the return air inlet of the return air device and the return air fan can also be separated and connected through a return air space, and the return air space can be an underfloor space or can be limited by an air pipe.
Further, in the pollutant control system of the present invention, it is preferable that the preset rotation speed is set to increase with an increase in the concentration of the air pollutant, or the preset distance is set to increase with an increase in the preset rotation speed.
According to the pollutant control system, the preset rotating speed of the return air fan of the return air device is adjusted according to the distance between the air pollutants and the return air inlet of the return air device, so that the specific area where the air pollutants are located is covered by the effective suction area of the return air device, and the air pollutants on more paths can be sucked by the return air device.
Further, in the pollutant control system of the present invention, it is preferable that the area covers a range of 0.4m to 1.9m from the ground in the target space, or the area covers a range of 0.7m to 1.4m from the ground in the target space, or the area covers a range of 0.7m to 1m from the ground in the target space.
Here, 1.9m corresponds to a standing height of an adult, 0.4m corresponds to a seat surface height of a person, 0.7m corresponds to a child sitting height, 1.4m corresponds to an adult sitting height, and 1m corresponds to a height at which the mouth and nose portions of the adult sit.
According to the pollutant control system of the invention, the effective suction area of the air return device covers the range of 0.4 m-1.9 m from the ground in the object space, so that the cross infection of personnel in the object space caused by the fact that pollutants diffuse to the upper part in the object space and diffuse into the whole object space can be reliably prevented or inhibited, and meanwhile, the condition that the rotating speed of the air return fan needs to be set high due to overlarge area coverage can be avoided, and the energy consumption can be reduced.
In addition, in the pollutant control system of the present invention, it is preferable that the air returning device has a plurality of the preset rotation speeds corresponding to a plurality of the preset distances, and the preset rotation speed corresponding to the preset distance can be manually or automatically selected according to an actual situation.
According to the pollutant control system, the air return device is provided with a plurality of preset rotating speeds corresponding to a plurality of preset distances, and the preset rotating speeds corresponding to the preset distances can be manually or automatically selected according to actual conditions, so that the energy conservation is facilitated, and the range of mountable places is wider.
Further, in the contamination control system of the present invention, it is preferable that the return air port is provided in one or more of the following positions: at an obstacle within the object space; a bottom of the object space; and a space between the obstacle and a bottom of the object space.
Here, the obstacle is, for example, a table, a shelf, a cabinet, and the like. When the air return opening is arranged on the barrier, the air return opening is closer to the mouth and the nose of a person, so that energy is relatively saved.
Further, in the pollutant control system of the present invention, it is preferable that at least one of the return air inlets is provided in a projection space formed by vertically projecting the obstacle toward the bottom of the target space, or in a vertical projection of the obstacle at the bottom of the target space.
According to the pollutant control system of the invention, at least one air return opening is arranged in the projection space formed by vertically projecting the barrier towards the bottom of the object space or in the vertical projection of the barrier at the bottom of the object space, so that the air return opening is prevented from being blocked frequently due to the movement of people in the object space, and the working noise of the air return device is reduced.
Further, in the pollutant control system of the present invention, it is preferable that at least one of the return air inlets is provided on the floor below the obstacle.
According to the pollutant control system, at least one air return opening is arranged on the floor below the barrier, so that the area where people walk is avoided, the risk that the people are stumbled by the air return device is guaranteed, the air return opening is more favorably prevented from being blocked frequently due to the movement of the people in the object space, and the working noise of the air return device is favorably reduced.
Further, in the pollutant control system of the present invention, it is preferable that at least one of the return air inlets is provided in the vicinity of an edge of a vertical projection of the obstacle at the bottom of the object space.
According to the pollutant control system of the invention, at least one air return opening is arranged near the edge of the vertical projection of the barrier at the bottom of the object space, so that the air return opening is closer to a pollution source compared with the air return opening arranged near the center of the vertical projection of the barrier at the bottom of the object space, which is beneficial to reducing the required air return amount, thereby reducing the energy consumption and the working noise of the air return device.
Further, in the pollutant control system of the present invention, it is preferable that the return air opening is provided at a central position of a vertical projection of the obstacle at the bottom of the object space.
According to the pollutant control system of the invention, the air return opening is arranged at the central position of the vertical projection of the barrier at the bottom of the object space, so that pollutants on two sides of the barrier can be uniformly treated.
Further, in the pollutant control system of the present invention, it is preferable that said air return means comprises a casing, and a plurality of said air return openings are provided in said casing, said plurality of said air return openings being remote from each other.
According to the pollutant control system, the air return device comprises the shell, the shell is provided with the plurality of air return openings, and the plurality of air return openings are far away from each other, so that the air return device is beneficial to approaching a pollution source, and the required air return amount is reduced, so that the energy consumption is reduced, and the working noise of the air return device is reduced.
In addition, in the pollutant control system of the present invention, it is preferable that the air return opening has a long strip shape (e.g., a rectangular shape), and a long side corresponds to a side where the pollution source is located.
According to the pollutant control system, the air return opening is in a long strip shape, and the long edge of the air return opening corresponds to one side where the pollution source is located, so that air pollutants are sucked by the air return device more favorably.
In the pollutant control system of the present invention, it is preferable that the air return device is provided so as to be capable of adjusting one or both of the area of the air return opening and the preset rotation speed.
According to the pollutant control system of the invention, the air return device is set to be capable of adjusting one or both of the area of the air return inlet and the preset rotating speed, so that the air return device can be operated in the most energy-saving mode easily according to the change of personnel in the target space and the like, the energy consumption is reduced, and the working noise of the air return device is reduced.
Further, in the pollutant control system of the present invention, it is preferable that the pollutant control system further comprises an exhaust means for exhausting air to the outside of the target space, the exhaust means being connected to the return air means.
The pollutant control system of the present invention also includes one air exhauster to exhaust air to the outside of the target space and connected to the air returning unit, so that the air pollutant the air returning unit sucks is led to outdoor.
In addition, in the pollutant control system of the invention, preferably, the pollutant control system further comprises an air purifying device for purifying air pollutants, and the air purifying device is connected with the air returning device.
The pollutant control system also comprises an air purification device for purifying air pollutants, and the air purification device is connected with the air return device, so that the air pollutants can be easily and thoroughly removed, and secondary pollution caused by the air pollutants sucked by the air return device is avoided.
In addition, in the pollutant control system of the present invention, preferably, the pollutant control system further comprises an air outlet device, and the air supply direction of the air outlet device comprises one or more of the following: blowing air toward the target space from a top of the target space; blowing air from a side portion and an upper portion of the target space toward a top portion of the target space; and horizontally blowing air from a side portion of the target space toward an upper portion of the target space.
According to the pollutant control system, the air outlet device is further included, air is directly or indirectly supplied to the lower part of the target space, and in some cases, the air outlet device does not directly act on the space where the air pollutants are located, so that the air pollutants can be prevented from being blown away at a lower position. Further, by matching with the air return device, pressure balance in the target space is achieved, or a slight positive pressure is formed in the target space, so that it is possible to more easily prevent or suppress cross contamination of persons in the target space caused by the upward diffusion of air pollutants in the target space into the entire target space. In addition, under the condition of micro-positive pressure, air outside the object space cannot enter the object space, for example, outside air cannot enter a room through door seams, window seams and the like, and the influence of other pollutants is further avoided.
In addition, in the pollutant control system of the present invention, it is preferable that the air outlet device is disposed at an upper portion of a sidewall of the target space, and/or the air outlet device is disposed outside a vertical projection of an obstacle in the target space at a top of the target space.
According to the pollutant control system, the air outlet device is arranged at the upper part of the side wall of the object space, and/or the air outlet device is arranged outside the vertical projection of the barrier in the object space at the top of the object space, so that the situation that the air outlet of the air outlet device collides with the barrier in the object space to form backflow, vortex and turbulent flow so as to diffuse into the whole object space and cause cross infection of personnel in the object space can be avoided. In the prior clean room and the like, vertical air flow is formed by utilizing an air outlet and an air return inlet which are correspondingly arranged up and down to avoid the pollutants from diffusing towards the periphery, but the clean room is generally required not to have barriers as much as possible, otherwise, the air flow organization is influenced.
In the pollutant control system according to the present invention, it is preferable that the air outlet speed of the air outlet device is set to be equal to or lower than the preset suction air speed when the return air fan is operated.
According to the pollutant control system, when the return air fan works, the preset rotating speed forms the preset suction air speed, and the air outlet speed of the air outlet device is set to be lower than the preset suction air speed, so that vortex and backflow caused by air outlet can be avoided or reduced, and cross infection of personnel in the object space caused by the fact that air pollutants in the object space diffuse upwards and permeate into the whole object space can be effectively prevented or inhibited.
Further, in the contamination control system of the present invention, it is preferable to further include: an air return passage; and an air handling device including at least one of an exhaust device and an air purification device, wherein the return air passage is connected to the return air device and the air handling device, and an air current flowing out from the return air device enters the air handling device through the return air passage.
The contamination control system according to the present invention, further comprising: an air return passage; and an air treatment device having at least one of an exhaust device and an air purification device, wherein the return air passage is connected to the return air device and the air treatment device, and an air current flowing out from the return air device enters the air treatment device through the return air passage.
Further, in the contaminant control system of the present invention, it is preferable that the return air path is a space under a raised floor.
According to the pollutant control system of the invention, the return air passage is a space under the raised floor, which is beneficial to simplifying installation, improving convenience of changing layout and reducing cost compared with the condition of arranging a special ventilation pipe to guide airflow flowing out from the return air device.
Further, in the contaminant control system of the present invention, the return air path may also be an underfloor return air duct.
Further, in the contaminant control system of the present invention, it is preferable that the return air fan is operated at a predetermined rotational speed when the return air device is operated alone, so that the air contaminants which are at a predetermined distance from the return air inlet and located at a position above the return air inlet move toward the return air inlet.
In order to achieve the above object, the present invention provides a return air device for sucking air pollutants in a target space, including a return air inlet and a return air fan, wherein the return air fan is operated at a predetermined rotational speed to suck air in the target space through the return air inlet, thereby suppressing a tendency of upward diffusion of the air pollutants in a region having a distance from the return air inlet of a predetermined distance or less, and the return air fan has a plurality of predetermined rotational speeds corresponding to a plurality of predetermined distances.
Here, as the plurality of preset distances, a distance (for example, 1.9m) corresponding to a standing height of an adult, a distance (for example, 0.4m) corresponding to a seat height of a person, a distance (for example, 0.7m) corresponding to a sitting height of a child, a distance (for example, 1.4m) corresponding to a sitting height of an adult, and a distance (for example, 1m) corresponding to a height at which the mouth and nose portion of an adult is located when sitting can be set.
In addition, in order to achieve the above object, the present invention provides a method of controlling an air return device, which controls the air return device, wherein a sensor is used to directly or indirectly detect a distance between an air contaminant and the air return opening, a preset rotation speed of the air return fan is determined according to a relationship between a maximum distance detected by the sensor and the preset distance, and the air return fan is operated at the preset rotation speed.
Here, as the sensor, a human detection sensor may be employed which detects the position of a human or even the approximate position of the mouth-nose portion of a human, thereby determining the distance between the position and the return air inlet to adaptively adjust the preset rotation speed of the return air fan. In addition, the sensor can be arranged on the air return device, and can also be arranged in object spaces, such as a ceiling, a side wall, an office table and the like. Also, the sensor may be a single sensor or a plurality of sensors. The detection precision can be improved by jointly detecting a plurality of sensors.
(effect of the invention)
The pollutant control system according to the present invention comprises a return air device having a return air inlet and a return air fan, the return air inlet being provided at a lower portion of an object space, the return air fan being operated at a predetermined rotational speed to suck air in the object space through the return air inlet, thereby suppressing a tendency of air pollutants in an area having a distance below a predetermined distance from the return air inlet to diffuse upward, and therefore, by only providing the return air device at the lower portion of the object space and operating the return air device at the predetermined rotational speed, a diffusion path of the air pollutants in the area below the predetermined distance can be controlled to flow entirely downward, so that the air pollutants are rapidly sucked by the return air device, thereby preventing the air pollutants from diffusing all around, whereby, for example, when a person in the object space exhales a pollutant-containing gas, it is easy to prevent or suppress the diffusion of the pollutants to the entire object space due to the diffusion of the pollutants upward in the object space And influences the physical and psychological health of people in the target space and positioned on the air pollutant diffusion path.
Drawings
Fig. 1A is a side view schematically showing a contaminant control system according to embodiment 1 of the present invention.
Fig. 1B is a partial side view schematically showing a contaminant control system according to embodiment 1 of the present invention.
Fig. 2 is a side view schematically showing a contamination control system according to embodiment 2 of the present invention.
Fig. 3 is a side view schematically showing a contamination control system according to embodiment 3 of the present invention.
Fig. 4 is a side view schematically showing a contamination control system according to embodiment 4 of the present invention.
Fig. 5A is a side view schematically showing an example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5B is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5C is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5D is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5E is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5F is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5G is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 5H is a side view schematically showing another example of the arrangement of the air returning device and the air outlet device with respect to the obstacle in the pollution control system according to the present invention.
Fig. 6A is a simulation diagram showing an experimental example of the contamination control system of the present invention.
Fig. 6B is another simulation diagram showing an experimental example of the contamination control system of the present invention.
Fig. 7A is another simulation diagram showing an experimental example of the contamination control system of the present invention.
Fig. 7B is another simulation diagram showing an experimental example of the contamination control system of the present invention.
Fig. 8 is another simulation diagram showing an experimental example of the contamination control system of the present invention.
Fig. 9 is a side view schematically showing a contamination control system according to a modification of the present invention.
(symbol description)
10 air return device
11 casing
111 air return inlet
112 air outlet
12 air return fan
20 air exhausting device
30 air purification device
31 shell
40 air-out device
41 casing
411 air supply outlet
412 air suction inlet
42 blowing fan
EP1 return air passage
EP2 return air passage
S object space
FL floor
CL ceiling
OB obstacle
PT infectious patient
P air pollutant
Detailed Description
In one embodiment of the present invention, by providing the air returning device in the subject space, the upward diffusion of the air contaminant within a preset distance from the air returning opening of the air returning device is suppressed and the air contaminant is sucked away from the subject space by the suction action of the air returning device on the air in the subject space, thereby forming a safe area at least within the preset distance from the air returning opening. The area is not an independent object space longitudinal section, but a space area with an upper distance, a lower distance, a left distance and a right distance, so that air pollutants in a preset distance from a return air inlet can be controlled by only utilizing return air without air outlet. In one embodiment, the predetermined distance formed by the suction action of the air returning means covers a range of 0.4m to 1.9m upward from the ground in the subject space, which is a range of possible breathing of a person. The air pollutant is restrained from diffusing upwards and is quickly drawn out of the object space, so that a safe area is formed, and the condition of cross infection is reduced.
In a conventional clean room, the control of pollutants is usually realized by using outlet air, the outflow of indoor air flow is realized by using a pore plate floor, and the control of pollutants is not realized by return air. And the ceiling of the clean room is used for air outlet, and pollutant control is realized by arranging airflow which directly blows downwards vertically in the whole room.
In a specific embodiment, the return air inlet of the return air device can be arranged at a plurality of positions, and the return air inlets at different positions can be used independently or in combination, for example, one return air inlet of the return air device is arranged on a barrier, and one return air inlet is arranged on the floor.
In another embodiment of the invention, the contaminant control system includes a return air device and an air handling device, wherein the return air device is arranged similarly to that described above. The air treatment device is in gas communication with the air return device, and the air treatment device is used for treating the air from the air return device, such as directly discharging the air to the outdoor or purifying the air and then returning the air to the target space. By means of the exhaust gases, some pollutants (e.g. CO) which cannot be treated can be removed2Etc.) so that the relevant pollutants (e.g., CO) in the object space are eliminated2Etc.) concentration is within a proper range, thereby ensuring the comfortable state of personnel and avoiding the feeling of chest distress and headacheThe method is described. The disposable and adsorbable pollutants (such as part of virus, PM2.5, TVOC and the like) can be adsorbed or treated by the air purification mode, and meanwhile, the air communication with the outside (outdoor or other rooms) is reduced, and the secondary pollution is avoided.
In yet another embodiment of the present invention, the contaminant control system includes a return air device and an outlet air device, wherein the return air device is similarly positioned and positioned above. The air outlet device is used for keeping indoor pressure balance, and the condition of indoor negative pressure is avoided. In one embodiment, the air outlet volume of the air outlet device can be slightly larger than the air return volume of the air return device, so that the object space is in a micro-positive pressure state, and pollutants at other places are prevented from entering the object space from gaps. In one embodiment, the air outlet device is arranged at the upper part (including the top) of the target space and supplies air into the target space in a top-down mode, the air return device is arranged at the lower part (including the bottom) of the target space and sucks the air in the target space downwards into the air return device, and therefore, a roughly top-down airflow organization is formed in the target space, and the upward diffusion of pollutants is further inhibited.
In yet another embodiment of the present invention, a pollutant control system comprises an air return device, an air handling device, and an air outlet device. The three can jointly form an inner loop of the object space.
Hereinafter, a pollutant control system according to an embodiment of the present invention will be described with reference to the drawings.
Here, the upper side in the drawings corresponds to the upper side in reality, and the lower side in the drawings corresponds to the lower side in reality.
(1) Example 1 (Single Return air)
In embodiment 1, as shown in fig. 1A and 1B, a contaminant control system for controlling diffusion of air contaminants P (e.g., hot air exhaled by an infectious patient PT) in a subject space S (e.g., a room) includes a return air device 10 having a return air inlet 111 and a return air fan 12, wherein the return air inlet 111 is provided at a lower portion of the subject space S, and the return air fan 12 is operated at a preset rotation speed PV to suck air in the subject space S through the return air inlet 111, thereby suppressing a tendency of the air contaminants P in a region where a distance R from the return air inlet 111 is below the preset distance PR to diffuse toward an upper portion of the return air inlet 111.
Incidentally, the above-mentioned "distance R" is calculated from the center point of the single tuyere 111. For example, in the example shown in fig. 1A and 1B, the return air device 10 has two left and right return air inlets 111 each having a rectangular shape in plan view, and the "distance R" is a distance from a center point (intersection of diagonal lines) of the left return air inlet 111 with respect to the left return air inlet 111, and the "distance R" is a distance from a center point (intersection of diagonal lines) of the right return air inlet 111 with respect to the right return air inlet 111. The preset distance PR may be set to 1.9m, for example, in consideration of the general height and working state of a person.
Here, as shown in fig. 1A and 1B, the air return device 10 is provided at the bottom of the target space S. Specifically, the air return device 10 includes a casing 11, a return air opening 111 is provided in an upper surface of the casing 11, a return air fan 12 is provided in the casing 11, a main body of the casing 11 is provided below a floor FL (e.g., an overhead floor) at a bottom of the target space S, and the return air opening 111 is substantially flush with the floor FL. Air discharge ports 112 are provided on the left and right side surfaces of the casing 11, and when the return air fan 12 is operated, air containing air pollutants P in the target space S is sucked into the casing 11 through the return air port 111 and discharged to the space below the floor FL through the air discharge ports 112 in the casing 11.
Further, in the return air device 10, the return air fan 12 has a plurality of preset rotation speeds PV of a plurality of stages corresponding to a plurality of preset distances PR, and the preset distance PR is set to increase as the preset rotation speed PV increases.
In addition, in the return air device 10, both the area of the return air opening 111 and the preset rotation speed PV can be adjusted.
Further, in the present embodiment, when the return air device 10 is operated, the return air fan 12 is operated at the preset rotation speed PV so that the air contaminant P located at a position which is a preset distance PR from the return air opening 111 and is located above the return air opening 111 moves toward the return air opening 111.
Further, although not shown, the contamination control system may further include a control unit for controlling operations of the respective devices included in the contamination control system. For example, the control portion can automatically select the preset rotation speed PV corresponding to the preset distance PR according to actual conditions.
The contaminant control system according to the present embodiment includes a return air device 10, the return air device 10 having a return air inlet 111 and a return air fan 12, the return air inlet 111 being provided at a lower portion of a subject space S, the return air fan 12 being operated at a predetermined rotation speed PV to suck air in the subject space S through the return air inlet 111, thereby suppressing a tendency of air contaminants P in a region having a distance R from the return air inlet 111 below a predetermined distance PR to diffuse toward an upper portion of the return air inlet 111, and therefore, only by providing the return air device 10 at the lower portion of the subject space S and operating the return air device 10 at the predetermined rotation speed, a diffusion path of the air contaminants P in the region below the predetermined distance PR can be controlled to flow the entire air contaminants P downward and be quickly sucked by the return air device 10, thereby preventing the air contaminants P from diffusing around, and thus, for example, when a person in the subject space S exhales a gas containing the air contaminants P, it is easy to prevent or suppress the air pollutants P from diffusing upward in the target space S to diffuse into the entire target space S, and to affect the physical and psychological health of the person in the target space S who is located on the air pollutant diffusion path.
Further, according to the pollutant control system of the present embodiment, the return air fan 12 is operated at the preset rotation speed PV so that the air pollutant P located at the position above the return air inlet 111 with the distance R from the return air inlet 111 being the preset distance PR moves toward the return air inlet 111, and therefore, it is easier to prevent or suppress the air pollutant P in the target space S from diffusing upward to diffuse into the entire target space S and affecting the physical and mental health of the person in the target space S located on the air pollutant diffusion path.
(2) Example 2 (Return air + exhaust)
In embodiment 2, as shown in fig. 2, the pollutant control system has substantially the same structure as that of embodiment 1, except that it further includes an exhaust device 20 for exhausting air to the outside (outdoor space) of the subject space S, and the exhaust device 20 is connected to the return air device 10.
Here, as shown in fig. 2, the exhaust device 20 communicates with the exhaust port 112 of the return air device 10 via a return air passage EP 1.
In addition, the exhaust device 20 may be only an exhaust port, or may be an air outlet end with a fan.
As shown in fig. 2, the return air passage EP1 is formed by a duct, but may be formed by a space under the floor FL.
The pollutant control system according to this embodiment can achieve substantially the same technical effects as the pollutant control system of example 1.
Further, according to the pollutant control system of the present embodiment, since the air pollutants sucked from the target space S by the air returning device 10 are discharged to the outside of the target space S through the exhaust device 20, the air pollutants in the target space S can be removed efficiently and at low cost.
(3) Example 3 (Return air + clean)
In embodiment 3, as shown in fig. 3, the pollutant control system has substantially the same structure as that of embodiment 1, except that it further comprises an air cleaning device 30 for cleaning air pollutants, and the air cleaning device 30 is connected to the return air device 10.
Here, as shown in fig. 3, the air cleaning device 30 is provided on the floor FL and communicates with the discharge outlet 112 of the return air device 10 via a return air passage EP 2.
As shown in fig. 3, the return air passage EP2 is formed by a duct, but may be formed by a space under the floor FL.
As shown in fig. 3, the air cleaning device 30 includes a housing 31, the housing 31 having an air inlet and an air outlet, a filter member provided in the housing, the air inlet of the housing 31 communicating with a return air passage EP2, and the air outlet of the housing 31 opening toward the target space S. In one embodiment, the air outlet of the housing 31 is disposed at an upper portion of the target space S to reduce disturbance of the air flow in the target space S when the air is discharged from the air purifying device 30.
The pollutant control system according to this embodiment can achieve substantially the same technical effects as the pollutant control system of example 1.
Further, according to the pollutant control system of the present embodiment, since the air pollutants sucked from the target space S by the air returning device 10 are discharged into the target space S through the air cleaning device 30, the internal circulation of air in the target space S can be efficiently formed, and the air pollutants in the target space S can be efficiently removed at low cost.
(4) Example 4 (Return air + Outlet)
In embodiment 4, as shown in fig. 4, the pollutant control system has substantially the same structure as that of embodiment 1, except that the pollutant control system further includes an air outlet device 40, and the air outlet device 40 blows air into the target space S.
Here, as shown in fig. 4, the air outlet device 40 is provided at the ceiling of the target space S, and blows air from the ceiling of the target space S directly downward of the target space. Specifically, the air outlet device 40 includes a casing 41, an air outlet 411 is provided on a lower surface of the casing 41, an air blowing fan 42 is provided in the casing 41, a main body of the casing 41 is provided on a rear side of the ceiling CL at a ceiling portion of the target space S, and the air outlet 411 is substantially flush with the ceiling CL. An air suction port 412 is provided in a side surface of the housing 41. When the blower fan 42 is operated, air above the ceiling CL is sucked into the casing 41 through the air inlet 412 and is discharged into the target space S through the air outlet 411 of the casing 41.
When the return air fan 10 is operated, the outlet air speed of the outlet device 40 is set to be equal to or lower than the preset inlet air speed of the return air fan 10.
In another embodiment, the outlet device 40 is an outlet panel having a grill, and is disposed on the ceiling CL at the top of the target space S, so that the air flow can enter the target space S from the space inside the ceiling.
The pollutant control system according to this embodiment can achieve substantially the same technical effects as the pollutant control system of example 1.
Further, according to the pollutant control system of the present embodiment, since the air outlet device 40 is further provided, and the air outlet device 40 directly blows air downward of the target space S, it is possible to prevent or suppress the cross contamination of the person in the target space S, which is caused by the upward diffusion of the air pollutants in the target space S, from spreading into the entire target space by the cooperation with the air returning device 10.
Further, according to the pollutant control system of the present embodiment, when the return air fan 10 is operated, the outlet air speed of the outlet device 40 is set to be equal to or lower than the preset inlet air speed of the return air fan 10, and therefore, it is possible to effectively prevent or suppress the occurrence of an eddy current, and cross contamination of people in the target space S due to the diffusion of the air pollutants P in the target space S upward and the diffusion of the air pollutants P into the entire target space S.
In another embodiment, the pollutant control system can comprise an exhaust device as described in embodiment 2 and/or an air purification device as described in embodiment 3, and an air outlet device as described in embodiment 4. The air outlet device can be connected with the air purification device so as to send the air treated by the air purification device into the object space.
Next, in order to further clarify the technical effects of the contamination control system of the present invention, a specific experimental example will be described.
1) Influence of preset rotating speed of air return device on pollutant control system for preventing or inhibiting upward diffusion effect of air pollutants
When the air return device has a proper preset suction air speed, the effect of inhibiting pollutants from diffusing upwards can be achieved. And, when the concentration of air pollutants in the object space is increased, the upward diffusion of pollutants can be inhibited by correspondingly increasing the suction wind speed of the preset air return device.
For example, in the layout shown in fig. 5G, as shown in fig. 6A and 6B, by increasing the suction wind speed of the air returning device 10 (the suction wind speed in fig. 6B is greater than that in fig. 6A), the effect of suppressing the upward diffusion of air pollutants is increasing.
In addition, in the layout shown in fig. 5H, as shown in fig. 7A and 7B, by increasing the suction wind speed of the air returning device (the suction wind speed in fig. 7B is greater than that in fig. 7A), the effect of suppressing the upward diffusion of air pollutants is increasing.
In other words, when the preset suction wind speed is increased, the area that can be covered is larger, and thus the control effect is better.
2) Influence of air outlet speed of air outlet device on pollutant control system for preventing or inhibiting upward diffusion effect of air pollutants
The preset blowing-out wind speed of the air outlet device cannot be larger than the preset suction wind speed of the air return device, and the preset blowing-out wind speed cannot be too large, otherwise, pollutants may be upwards diffused.
According to the experimental simulation, in the case where the blowing wind speed is small, for example, the blowing wind speed is not more than 0.6m/s (for example, 0.5m/s or 0.3m/s), the air contaminant does not diffuse upward or the tendency of diffusing upward is significantly suppressed.
3) Influence of position of return air device/return air inlet on energy consumption/noise
When the return air device/return air inlet is closer to the pollution source, the smaller the return air volume required for achieving the effect of inhibiting upward diffusion of pollutants, the smaller the energy consumption.
For example, as shown in fig. 6B (layout of fig. 5G) and 7B (layout of fig. 5H), when the return air inlet areas are substantially the same, the required return air volume is smaller in fig. 7B than in fig. 6B, and therefore the energy consumption is small. In addition, because the return air area is approximately the same, the return air volume is small, the suction air speed is also small, and the noise generated by the return air device is reduced along with the reduction.
4) Influence of quantity, layout and shape of return air inlets on energy consumption
Under the condition that the return air areas are the same, when the return air inlets meet one or more of (a) the number is increased, (b) a plurality of return air inlets are mutually far away, and (c) the length is more than the width, the return air volume required for achieving the effect of inhibiting the upward diffusion of air pollutants is smaller, and the energy consumption is smaller.
For example, in the case that the areas of the return air inlets are the same, when the number of the return air inlets is one, the length and the width are the same, and the return air inlets are located at the middle of two pollution sources, compared to the case that the number of the return air inlets is two, the length is greater than the width, and the return air inlets are far away from each other (both close to the corresponding pollution sources), the pollutant control effects of the return air inlets and the width are better (as shown in fig. 6B and 8), but the return air volume required by the manner of the two return air inlets in fig. 8 is smaller than the return air volume of the one return air inlet in fig. 6B.
5) The influence of the area of the return air inlet and the wind speed on the energy consumption.
The area of the return air inlet of the return air device is reduced, the return air speed is increased, the required air quantity can be reduced, and the energy consumption is reduced.
According to the experiment, under the condition that the shape and the position of the return air inlet are not changed, when the area of the return air inlet is changed from 0.09m2Reduced to 0.04m2When the return air area is reduced to more than half of the original area, the suction air speed does not need to be increased to more than one time of the original area, and a good pollutant control effect can be achieved. The required return air quantity is small by adjusting the area of the return air inlet and the suction air speed, and the pollutant control effect is equivalent.
The invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above.
For example, in the above embodiment, a sensor may be further provided, and a distance between the air contaminant and the return air opening in the target space is directly or indirectly detected by the sensor, and the preset rotation speed of the return air fan is determined based on a relationship between the maximum distance detected by the sensor and the preset distance, and the return air fan is operated at the preset rotation speed. The sensor may be a human detection sensor such as an infrared sensor.
In the above-described embodiment, the return opening 111 of the return air device 10 has a square or rectangular shape, but the present invention is not limited to this, and the return opening 111 of the return air device 10 may have a rectangular shape other than a square or rectangular shape, or may have a circular arc shape, a zigzag shape, or the like.
In the above embodiment, one or two return air inlets 111 are provided, but the present invention is not limited to this, and more return air inlets may be provided (for example, a plurality of return air inlets are provided in one return air device 10, or a plurality of return air devices 10 each having a return air inlet 111 are provided). In the case where a plurality of return air inlets 111 are provided, it is preferable that the plurality of return air inlets 111 are distributed at different positions in the target space S and are distant from each other. Therefore, the air return device is beneficial to approaching a pollution source, the required air return amount is reduced, the energy consumption is reduced, and the working noise of the air return device 10 is reduced.
Further, in the above-described embodiment, in the return air device 10, it is also possible that the preset rotation speed PV of the return air fan 12 is set to increase with an increase in the concentration of the air pollutants P, or the preset distance PR is set to increase with an increase in the preset rotation speed PV.
In the above embodiment, the air returning device 10 is provided at the bottom of the target space S or at the edge of the obstacle, but the air returning device 10 is not limited to this, and may be provided at a lower portion of the target space S (for example, below the table or the ceiling of the cabinet, or at a lower portion of the wall of the target space S).
In addition, in the above-described embodiment, the air outlets 112 are provided on the left and right side surfaces of the air returning device 10, but the present invention is not limited to this, and the positions and the number of the air outlets 112 may be appropriately set as needed, for example, the air outlets may be provided on the bottom surface of the air returning device 10, or the air outlets may be provided on both the side surfaces and the bottom surface of the air returning device 10.
The positional relationship between the air returning device 10 and the air outlet device 40 in the target space S may be as shown in fig. 5A to 5D, wherein the air returning device 40 may be provided in both the lower portion and the bottom portion of the target space, or the air returning device 40 may be provided only in the lower portion or only in the bottom portion. Further, when the object space S includes the obstacle OB, the air returning device 10, and the air outlet device 40 may be disposed in various positional relationships, for example, in fig. 5E to 5G, the air returning device 10 disposed at the bottom (floor) of the object space S and the air returning device 10 disposed at the lower portion (for example, the edge of a table top or the like) of the object space S are included together.
Further, in the above-described embodiment, when there is an obstacle OB such as a desk and a cabinet in the target space S, the return air opening 111 is preferably provided in one or more of the following positions: at an obstacle OB located within the object space S; the bottom of the object space S; and a space between the obstacle OB and the bottom of the object space S.
In the above case, it is preferable that at least one air return opening 111 is provided in a projection space (a space below the floor of the table in fig. 1A) formed by vertically projecting the obstacle OB toward the bottom of the target space S, or in a vertical projection (a vertical projection of the table on the floor FL in fig. 1A) of the obstacle OB on the bottom of the target space S. Further, it is preferable that the air outlet device 40 is provided outside a vertical projection of the obstacle OB in the target space S on the ceiling portion of the target space S.
In the above embodiment, the area of the return air inlet 111 and the preset rotation speed PV can be both adjusted in the return air device 10, but the present invention is not limited to this, and the return air device 10 may be configured to adjust only one of the area of the return air inlet 111 and the preset rotation speed PV.
In addition, in the above-mentioned embodiment, the air suction openings 412 are provided on the side surface of the air outlet device 40, but the invention is not limited thereto, and the positions and the number of the air suction openings 412 may be appropriately set according to the needs, for example, the air suction openings may also be provided on the top surface of the air outlet device 40, or the air suction openings may be provided on both the top surface and the side surface of the air outlet device 40.
In embodiment 4, the air outlet device 40 is provided at the ceiling of the target space S, and the air outlet device 40 blows air directly downward of the target space S, but the present invention is not limited thereto, and the air outlet device 40 may blow air indirectly downward of the target space S. That is, the air blowing direction of the air blowing device 40 may be air blowing from the side portion and the upper portion of the target space S toward the top portion of the target space S, or air blowing horizontally from the side portion of the target space S toward the upper portion of the target space S. For example, the air outlet device 40 is provided at an upper portion of a sidewall of the target space S.
In the above embodiment, the air outlet device 40 may directly introduce fresh air into the target space S from the outside (outdoor) of the target space S, or may be connected to the air returning device 10 via a duct or the like provided with an air purifying device in the middle, so as to send air sucked by the air returning device 10 and processed by the air purifying device into the target space S again.
In example 3, the air cleaning device 30 is a floor-standing small cleaner installed on the floor FL, but is not limited to this, and as shown in fig. 9, the air cleaning device 30 may be a large cleaner standing on its top, the bottom of which is in contact with the floor of the target space, for example, and the top of which is extended into the ceiling of the target space, for example (the air cleaning device 30 may be installed on a wall or on the back of a wall).
It should be understood that the present invention can freely combine the respective embodiments, or appropriately change or omit the respective embodiments within the scope thereof.
Claims (17)
1. A pollutant control system for controlling the diffusion of airborne pollutants in a target space,
comprises an air return device, a fan and a fan,
the air return device is provided with an air return inlet and an air return fan,
the air return opening is arranged at the lower part of the object space,
the return air fan operates at a preset rotation speed to suck air in the object space through the return air inlet, so that the tendency that air pollutants in an area with a distance below a preset distance from the return air inlet are diffused upwards is inhibited.
2. The contaminant control system of claim 1,
the preset rotation speed is set to increase with increasing concentration of air pollutants, or the preset distance is set to increase with increasing preset rotation speed.
3. The contamination control system of claim 1,
the region covers a range of 0.4m to 1.9m upward from the ground in the object space.
4. The contaminant control system of claim 3,
the air return opening is arranged in one or more of the following positions: at an obstacle within the object space; a bottom of the object space; and a space between the obstacle and a bottom of the object space.
5. The contaminant control system of claim 4,
at least one air return opening is arranged in a projection space formed by vertical projection of the barrier towards the bottom of the object space, or in the vertical projection of the barrier at the bottom of the object space.
6. The contaminant control system of claim 1,
the air returning device comprises a shell body,
a plurality of air return openings are arranged on the shell,
the plurality of air return openings are far away from each other.
7. The contaminant control system of claim 1,
the air return device is set to adjust one or both of the area of the air return opening and the preset rotating speed.
8. The contaminant control system of claim 1,
further comprising an exhaust device for exhausting air to the outside of the object space,
the exhaust device is connected with the air return device.
9. The contaminant control system of claim 1,
also comprises an air purifying device for purifying air pollutants,
the air purification device is connected with the air return device.
10. The contaminant control system of claim 1,
also comprises an air outlet device which is arranged on the air outlet device,
the air supply direction of the air outlet device comprises one or more of the following components: blowing air toward the target space from a ceiling of the target space; blowing air from a side portion and an upper portion of the target space toward a top portion of the target space; and horizontally blowing air from a side portion of the target space toward an upper portion of the target space.
11. The contaminant control system of claim 10,
the air outlet device is arranged at the upper part of the side wall of the object space,
and/or the presence of a gas in the gas,
the air outlet device is arranged outside the vertical projection of the barrier in the object space on the top of the object space.
12. The contaminant control system of claim 10,
when the return air fan works, a preset suction wind speed is formed by a preset rotating speed, and the wind outlet speed of the wind outlet device is set to be lower than the preset suction wind speed.
13. The contaminant control system of claim 1, further comprising:
an air return passage; and
an air treatment device having at least one of an exhaust device and an air purification device,
the air return passage is connected with the air return device and the air treatment device, and airflow flowing out of the air return device enters the air treatment device through the air return passage.
14. The contaminant control system of claim 13,
the return air passage is a space below the raised floor or a return air pipe below the raised floor.
15. The contaminant control system of claim 1,
when the air return device works independently, the air return fan operates at a preset rotating speed, so that air pollutants which are at a preset distance from the air return inlet and are positioned above the air return inlet move towards the air return inlet.
16. A return air device for sucking air contaminant in a subject space, having a return air inlet and a return air fan,
the return air fan is operated at a preset rotating speed to suck the air in the object space through the return air inlet, so that the tendency that air pollutants in an area with the distance below a preset distance from the return air inlet are diffused upwards is inhibited,
the air return fan is provided with a plurality of preset rotating speeds corresponding to the preset distances.
17. A method of controlling a return air device, characterized by controlling the return air device according to claim 16,
detecting the distance between the air pollutant and the air return opening directly or indirectly by using a sensor,
and determining the preset rotating speed of the return air fan according to the relationship between the maximum distance detected by the sensor and the preset distance, and enabling the return air fan to operate at the preset rotating speed.
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| CN202011357901.8A CN114543238A (en) | 2020-11-27 | 2020-11-27 | Pollutant control system, air return device and control method thereof |
| PCT/JP2021/043477 WO2022114148A1 (en) | 2020-11-27 | 2021-11-26 | Pollutant control system, return air device, and control method therefor |
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| CN202011357901.8A CN114543238A (en) | 2020-11-27 | 2020-11-27 | Pollutant control system, air return device and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117803999A (en) * | 2024-02-04 | 2024-04-02 | 江苏皓兮新能源技术开发有限公司 | Combined ground air return device for clean room of solar photovoltaic cell factory |
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| JP7383101B1 (en) | 2022-10-27 | 2023-11-17 | 鹿島建設株式会社 | Air conditioning control method |
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| CN117803999B (en) * | 2024-02-04 | 2024-07-05 | 江苏皓兮数智能源技术开发有限公司 | Combined ground air return device for clean room of solar photovoltaic cell factory |
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