CN112856671A - Air curtain system for air supply and exhaust in sickroom and use method thereof - Google Patents

Air curtain system for air supply and exhaust in sickroom and use method thereof Download PDF

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Publication number
CN112856671A
CN112856671A CN202110309212.8A CN202110309212A CN112856671A CN 112856671 A CN112856671 A CN 112856671A CN 202110309212 A CN202110309212 A CN 202110309212A CN 112856671 A CN112856671 A CN 112856671A
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China
Prior art keywords
air
opening
fan
distribution box
supply
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CN202110309212.8A
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Chinese (zh)
Inventor
杨斌
杨鹏飞
潘炳安
许帅星
金大程
周斌
苏伟
刘朋举
李安桂
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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Priority to CN202110309212.8A priority Critical patent/CN112856671A/en
Publication of CN112856671A publication Critical patent/CN112856671A/en
Pending legal-status Critical Current

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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
    • F24F11/89—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
    • 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
    • F24F9/00—Use of air currents for screening, e.g. air curtains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

The invention discloses an air curtain system for sending and exhausting air in a ward and a use method thereof, and the air curtain system comprises air distribution boxes, room air return ports and independent exhaust hoods which are oppositely arranged at two sides of a sickbed, wherein the two air distribution boxes have the same structure, the top of each air distribution box is provided with an air curtain air supply port, the bottom of each air distribution box is provided with a second air suction port, one side of each air distribution box, which is far away from the sickbed, is provided with a first air suction port, one side of each air distribution box, which is close to the sickbed, is provided with a horizontal air supply port and an air exhaust port, all the air ports are communicated through an air pipe, the air pipe is provided with a first opening and closing flow guide valve and a second opening and; the air curtain system of air supply and exhaust of the invention purifies the air around the patient pertinently, improve the air quality of the respiratory area of the patient, avoid the mutual infection between the patient and the medical care personnel, can be mainly applied to the respiratory infectious disease ward of the hospital.

Description

Air curtain system for air supply and exhaust in sickroom and use method thereof
Technical Field
The invention belongs to a hospital ventilation system, and particularly relates to an air curtain system for air supply and exhaust in a ward and a using method thereof.
Background
The risk of healthcare infection is ubiquitous in the global healthcare facility, one third of healthcare-acquired infections may involve airborne transmission, and in order to reduce the concentration and time of exposure of patients and healthcare workers to pathogenic microorganisms, ASHRAE standard 170 and other guidelines recommend 6-12ACH for use in infectious isolation rooms. Hospital heating, ventilation and air conditioning systems provide continuous indoor air quality in addition to personal comfort. Thus, hospital hvac systems are generally not load driven, but are based on providing sufficient ventilation air to maintain a wide range of directional airflow relationships (from cleaner to less clean spaces) and air change rates to control, dilute and eliminate hazards such as volatile medical gases, particulate matter and airborne disease transmission. Currently, higher air change rates may better dilute the contaminant concentration in the patient's room.
In the prior art, the traditional ventilation is generally applied to the ventilation of hospital beds, can play a role in diluting pathogenic bacteria, but cannot purify air around a patient in a targeted manner and isolate medical care personnel from the patient, particularly, during the epidemic period of infectious diseases, the patient continuously exhales viruses, and doctors and nurses often inhale a large amount of polluted air in the process of diagnosing, treating and nursing the patient, thereby causing certain threat to the health of the medical care personnel; in hospitals, ultraviolet sterilization and disinfection devices are used, and ultraviolet rays with the wavelength of 254nm have a sterilization effect, but the ultraviolet radiation can irritate skin and eyes and cannot be used around a human body, so that an ultraviolet lamp is generally placed on a wall between the head and the ceiling of a person, the sterilization efficiency of the system is greatly reduced, and the indoor relative humidity has a remarkable influence on the sterilization efficiency of the ultraviolet lamp; nielsen et al have proposed a low speed personalized ventilation system that utilizes the surface of a chair, neck rest pillow, bed, pillow, mattress, clothing, etc. that is in natural contact with the head or body as an air supply outlet to avoid cross-contamination. In view of the current technical situation, it is difficult to arrange the air ports on the irregular surface, and the distance between the delivered wind and the personnel is too close, and the wind speed is not easy to control.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an air curtain system for air supply and exhaust in a ward and a using method thereof, which can improve the air change rate in the ward, purify the air around a patient in a targeted manner and solve the problem of cross infection between the patient and medical care personnel.
In order to achieve the purpose, the invention provides the following technical scheme: a ward air curtain system for air supply and exhaust comprises air distribution boxes, room air return ports and independent exhaust hoods, wherein the air distribution boxes, the room air return ports and the independent exhaust hoods are oppositely arranged on two sides of a sickbed, the two air distribution boxes are identical in structure, an air curtain air supply port is formed in the top of each air distribution box, a second exhaust port is formed in the bottom of each air distribution box, a first exhaust port is formed in one side, away from the sickbed, of each air distribution box, a horizontal air supply port and an exhaust port are formed in one side, close to the sickbed, of each air distribution box, the horizontal air supply port is arranged above the exhaust port, all air ports are communicated through air pipes, a first opening and closing flow guide valve is arranged at the communication position of the air pipes and the horizontal air supply ports, a second opening and closing flow guide valve is arranged at the communication position of the air pipes and the exhaust ports, a first fan; and the air sent out from the air curtain air supply outlet enters an independent exhaust hood or a room air return inlet.
Furthermore, two room air return inlets are arranged on the ceiling right above the air curtain air supply outlet; the independent exhaust hood is arranged above the bed head of the sickbed.
Further, the first fan is a normally open fan, and the second fan and the third fan are both open and closed fans.
The device comprises a distribution box, a pipeline fan, a first opening/closing diversion valve, a second opening/closing diversion valve, a controller, an infrared camera and a controller, wherein the infrared camera is arranged on one side of the distribution box close to a sickbed, the controller is arranged in the distribution box and used for capturing the posture of a patient, and the controller is used for controlling the opening/closing of the pipeline fan and the positions of the first opening/closing diversion valve and the second opening/closing diversion valve according to the posture of the patient.
Further, the tuber pipe includes main branch tuber pipe and branch road tuber pipe, the second suction opening passes through main branch tuber pipe and air curtain supply-air outlet and realizes the intercommunication, one section that main branch tuber pipe is close to air curtain supply-air outlet is provided with first suction opening, be connected with two branch road tuber pipes on the main branch tuber pipe, two branch road tuber pipes realize the intercommunication with horizontal air supply-air outlet and air exit respectively, and two branch road tuber pipes are provided with first blast gate and the blast gate is opened and close to the second respectively with the intercommunication department of main branch tuber pipe.
Furthermore, the first opening and closing diversion valve and the second diversion valve are connected with the air pipe through flanges, and main components of the first opening and closing diversion valve and the second diversion valve are streamline valve plates.
Furthermore, all be provided with the filter in first suction opening and the second suction opening, the filter is medium efficiency or high efficiency filter.
Furthermore, the air curtain air supply outlet, the horizontal air supply outlet and the air outlet are all slit type grating air openings, the grating angle is adjustable, and the horizontal air supply outlet and the air outlet are the same in size.
Furthermore, the air speed of the air curtain air supply outlet is 1.5m/s-2.0m/s, and the air speed of the horizontal air supply outlet is 0.15m/s-0.22 m/s.
The invention also provides a using method of the air curtain system for sending and exhausting air in the ward, taking the patient lying on the right side as an example, when in use, the second fan is started in the air distribution box on the left side, the second fan pumps the indoor air to the second air suction opening, the air enters the air pipe, the second opening and closing diversion valve is adjusted to close the air pipe leading to the air outlet, and the third fan is closed; adjusting a first opening and closing diversion valve, opening an air pipe leading to a horizontal air supply port, sending air in the air pipe out of the horizontal air supply port, opening a first fan, extracting indoor air from a first air suction port by the first fan, sending the air out of an air curtain supply port to an independent exhaust hood or a room return air port, and forming an air curtain on the left side of the sickbed; in the right air distribution box, a first fan and a third fan are started, a second opening and closing diversion valve is adjusted, an air pipe leading to an air outlet is opened, a first opening and closing diversion valve is adjusted, and the air pipe leading to a horizontal air supply outlet is closed; the first fan extracts indoor air, the third fan extracts air sent out by the horizontal air supply outlet of the left air distribution box and harmful gas exhaled by a human body and enters the right air pipe, the air sent out by the horizontal air supply outlet of the left air distribution box, the harmful gas exhaled by the human body and the indoor air are all sent out to an independent exhaust hood or a room return air inlet from the air curtain supply outlet, and an air curtain is formed on the right side of the sickbed; when the patient lies on the left side, the air operation condition in the air distribution boxes on the two sides of the sickbed is opposite to that when the patient lies on the right side.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention discloses a ward air curtain air feeding and exhausting system, which comprises air distribution boxes at two sides of a sickbed, a room air return inlet and an independent exhaust hood, wherein the air distribution boxes at one side of the sickbed draw fresh air in an indoor air lake from a first air suction inlet and send the fresh air into a breathing area of a patient on the sickbed from a horizontal air supply inlet, so that the patient is positioned in the breathing area of the patientWhen fresh air is breathed, the air exhaled by the human body is blown to the air distribution box at the other side, so that the CO in the respiratory region of the patient is greatly reduced2The concentration improves the air quality of the respiratory area of the patient; the air exhaled by the human body is extracted by the air distribution box on the other side and rapidly flows into the vertical air curtain, and the air curtain plays a role in isolating air flow, so that the air around the patient is purified in a targeted manner, the patient and medical personnel are prevented from being infected with each other, and the air curtain can be mainly applied to respiratory infectious disease wards of hospitals.
The opening and closing diversion valve is arranged at the communication position of the main air pipe and the branch air pipe, and can achieve the effects of adjusting the working condition and changing the direction of the air flow, and also has the effects of guiding the air flow, reducing the local resistance of the air pipe and reducing the noise; the air curtain system achieves the purpose of adjusting the working condition by adjusting the position of the opening and closing of the diversion valve and the opening and closing of the fan; during epidemic situations, air sent out from the air supply port of the vertical air curtain is directly exhausted by the independent exhaust hood, and the formed air curtain can also play a role in isolating air flow and avoiding cross infection.
The air distribution box is provided with the infrared camera which can identify the change of the sleeping posture of a patient and automatically adjust the wind direction according to the change of the sleeping posture, so that the gas exhaled by the human body is always in the downstream area of the air supply flow, and CO is ensured2The high concentration area is always closest to the air outlet and far away from the air supply outlet, so that a local breathing area with extremely high air quality for patients is created.
Drawings
FIG. 1 is a schematic view of a ward air curtain system for ventilating air at ordinary times;
FIG. 2 is a schematic view of the air curtain system for air supply and exhaust during epidemic periods;
FIG. 3 is an overall view of the internal structure of air distribution boxes on both sides of a hospital bed;
FIG. 4 is a left side view of the left side air distribution box of the hospital bed;
FIG. 5 is a right side view of the left air distribution box of the hospital bed;
FIG. 6 is a flow chart of the operation of a cross-air flow control system based on computer vision monitoring;
wherein: the air curtain air supply opening is 1, the first air suction opening is 2, the second air suction opening is 3, the room air return opening is 4, the main path air pipe is 5, the branch air pipe is 6, the horizontal air supply opening is 7, the air distribution box is 8, the air outlet is 9, the first opening and closing diversion valve is 10, the second opening and closing diversion valve is 11, the first fan is 12, the second fan is 13, the third fan is 14, the independent exhaust hood is 15, and the infrared camera is 16.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1 to 3, the air curtain system for sending and exhausting air in a ward provided by the present invention, in which the background air supply mode of the room is replacement ventilation, comprises a common sickbed, air distribution boxes 8, independent exhaust hoods 15 and room air return ports 4 which are fixedly arranged at both sides of the sickbed through a bracket, wherein the air distribution boxes 8 are hollow inside, the two air distribution boxes 8 are oppositely arranged and have the same structure, and each air distribution box 8 is provided with 5 air ports, comprising:
as shown in fig. 4 and 5, the air curtain blowing port 1 is arranged at the top of the air distribution box 8, and is a grille blowing port for blowing air in the vertical direction to form an air curtain, and the blowing angle can be adjusted;
the first air suction opening 2 is arranged on one side, far away from the sickbed, of the air distribution box 8 and is used for providing main air quantity for the vertical air curtain.
The second air suction opening 3 is arranged at the bottom of the air distribution box 8, the second fan 13 is arranged in the second air suction opening 3, the second air suction opening 3 is connected with an external air pipe, and fresh air in the room air lake is extracted by means of the second fan 13 and is sent into the air distribution box 8.
The horizontal air supply opening 7 and the air outlet 9 are arranged on one side, close to the sickbed, of the air distribution box 8, the horizontal air supply opening 7 is arranged above the air outlet 9, the horizontal air supply opening 7 and the air outlet 9 are identical in size, the horizontal air supply opening 7 is a grille air opening, the air supply angle can be adjusted, indoor air after treatment is sent into a respiratory area of a patient, harmful gas exhaled by a human body is blown away, and the air is brought to the air outlet 9 of the air distribution box 8 on the other side;
the air outlet 9 is a grille air port, the direction of which can be adjusted, and harmful gas blown to the vicinity of the air outlet 9 by the horizontal air supply port 7 of the air distribution box 8 on the other side is received.
All wind gaps are communicated through a wind pipe arranged in the air distribution box 8, the wind pipe comprises a main branch wind pipe 5 and a branch wind pipe 6, a second suction port 3 is communicated with an air curtain air supply port 1 through the main branch wind pipe 5, one section of the main branch wind pipe 5, which is close to the air curtain air supply port 1, is provided with a first suction port 2, the main branch wind pipe 5 is communicated with two branch wind pipes 6, the two branch wind pipes 6 are communicated with a horizontal air supply port 7 and an air outlet 9 respectively, the branch wind pipe 6 communicated with the horizontal air supply port 7 and the main branch wind pipe 5 are provided with a first opening and closing diversion valve 10, and the branch wind pipe 6 communicated with the air outlet 9 and the main branch wind pipe 5 are provided with a second opening and closing diversion valve 11.
A room air return inlet 4 is arranged on a ceiling of a room right above the air curtain air supply outlet 1, a room air return inlet 4 is correspondingly arranged on an air distribution box 8, and the room air return inlet 4 is used in an epidemic-free period at ordinary times, sucks air blown out from the air curtain air supply outlet 1 and can be used for returning air of a normal air conditioning system;
the independent exhaust hood 15 sets up directly over in the middle of the head of a bed of sick bed, and two air distribution boxes 8 correspond and set up an independent exhaust hood 15, and independent exhaust hood 15 only uses during the epidemic situation, and during the epidemic situation, through the air supply angle of adjusting perpendicular air curtain supply-air outlet 1, independent exhaust hood 15 can inhale completely with the wind that air curtain supply-air outlet 1 sent out, discharges to outdoor after the centralized processing.
Pipeline fans are arranged in the air curtain air supply outlet 1, the first air suction opening 2 and the air exhaust opening 9 and comprise a first fan 12, a second fan 13 and a third fan 14, the pipeline fans are main power of airflow organization, wherein 1 first fan 12 is arranged in the air curtain air supply outlet 1, and the first fan 12 is a normally open fan and is used for providing power for supplying air to form an air curtain; the second suction opening 3 is internally provided with 1 second fan 13, and the second fan 13 is used for opening and closing the fan and providing stable wind speed for the air supply opening; the air outlet 9 is internally provided with 1 third fan 14, the third fan 14 is an on-off fan, the fan sucks harmful gas exhaled by a human body near the air outlet 9 into the air outlet 9, and the two on-off fans cannot be used simultaneously;
preferably, the air distribution box 8 is a box body, the outer surface of the box body is regular, an air port is convenient to arrange, and a fan is further arranged in the air port, so that the air speed at the side of the air outlet is convenient to adjust, and people are prevented from having a blowing feeling.
Preferably, the pipeline fan adopts a fan which is selected to meet the noise standard, or a silencer is arranged in the air pipe, so that the noise-free treatment of the pipeline fan is realized.
Preferably, the horizontal air supply opening 7 and the air discharge opening 9 are each 0.2m by 0.1m in size, the air curtain supply opening 1 is 0.3m by 0.1m in size, and the first suction opening 10 is 0.2m by 0.1m in size.
Preferably, the air speed of the air curtain air outlet 1 is 1.5m/s, and the air speeds of the horizontal air supply opening 7 and the air outlet 9 are 0.2 m/s.
Preferably, the first opening and closing diversion valve 10 and the second opening and closing diversion valve 11 are connected with the air pipe through flanges, main components of the first opening and closing diversion valve 10 and the second opening and closing diversion valve 11 are streamline valve plates, the valve plates rotate through rotating shafts, the rotating shafts are arranged on the inner wall surfaces of the air pipe sections instead of crossing the air pipe sections, and the opening and closing diversion valves can achieve the effects of adjusting working conditions and changing the trend of air flow, guiding air flow, reducing local resistance of the air pipe and reducing noise.
Preferably, filters are arranged in the first suction opening 2 and the second suction opening 3, and the filters are medium-efficiency or high-efficiency filters; the filter is mainly used for filtering out dust, fly ash and other pollutants, keeping the blower and the pipeline clean and avoiding polluting the air in the breathing zone.
Preferably, the independent exhaust hood 15 is a spherical exhaust hood, and exhaust air is exhausted to the outside after centralized treatment and cannot be used as return air.
As shown in fig. 3 and 6, an infrared camera 16 is further arranged on one side of the air distribution box 8 close to the hospital bed, a controller is arranged in the air distribution box 8, the infrared camera 16 is used for capturing the posture of the patient, and the posture of the patient can be detected based on the euler video amplification technology, including the left side lying posture, the right side lying posture and the supine posture. The controller processes the information obtained by the Euler video amplification technology, outputs an instruction to the actuator, and changes the opening and closing of the second fan 13 and the third fan 14 in the air distribution box 8 and the position states of the first opening and closing diversion valve 10 and the second opening and closing diversion valve 11, so that the air return state of the air distribution boxes 8 on two sides of the sickbed is changed, and the purpose of automatically adjusting the working condition is achieved.
Specifically, if the patient is detected to lie on the right side, the air supply of the left air distribution box 8 is started and the air exhaust is closed by adjusting the first opening and closing diversion valve 10 and the second opening and closing diversion valve 11, and the air supply of the right air distribution box 8 is closed and the air exhaust is opened. If the patient is detected to lie on the left side, the air supply and the air exhaust of the left air distribution box 8 are closed and the air exhaust is opened by adjusting the first opening and closing diversion valve 10 and the second opening and closing diversion valve 11, and the air supply and the air exhaust of the right air distribution box 8 are opened and the air exhaust is closed. If the patient is detected to lie flat, the current running state of the system is kept unchanged.
When the bed is used in daily life, the air distribution box 8 and the room air return opening 4 on the two sides of the bed body are opened, the room air return opening 4 is closed in the stage (epidemic situation period) with infectious diseases, the air distribution box 8 and the independent exhaust hood 15 are opened, the airflow sprayed out from the air curtain air supply opening 1 is directly extracted, and the return air is not arranged.
By taking fig. 3 as an example, the states of the structures inside the air distribution box when air is supplied from the left side and exhausted from the right side of the air distribution box on both sides of the sickbed will be described in detail.
In the left air distribution box 8, the second fan 13 is started, and the second fan 13 extracts high-quality indoor air in the indoor air lake from the second air suction port 3, filters the high-quality indoor air through the filter and then enters the main air duct 5.
And adjusting a first opening and closing diversion valve 10 and a second opening and closing diversion valve 11 on the two branch air pipes 6 to enable the horizontal air supply outlet 7 to be in an opening state, enable the air outlet 9 to be in a closing state and close the third fan 14.
Adjusting the grille angle of the horizontal air supply opening 7 to adjust the wind direction, CO2Since it is denser than air and tends to be deposited at a lower position, the grill angle is generally set to face downward at an angle of 10 ° to the horizontal, and high quality room air drawn from the room air lake is blown out from the horizontal air blowing port 7 at a speed of 0.2 m/s.
The first suction opening 2 is in a normally open state, the first fan 12 is started, the first fan 12 sends out the indoor air extracted from the first suction opening 2 from the air curtain air supply opening 1 at the speed of 1.5m/s, and an air curtain is formed on the left side of the sickbed.
Meanwhile, in the air distribution box 8 on the right side, the second fan 13 is closed, the first opening/closing diversion valve 10 and the second opening/closing diversion valve 11 on the two branch air pipes 6 are adjusted, so that the horizontal air supply opening 7 is in a closed state, the air outlet 9 is in an open state, and the second fan 13 is opened to enable harmful gases (CO) exhaled by human bodies near the air outlet 92) Is sucked into the main path air pipe 5 from the branch air pipe 6.
The first fan 12 is in a normally open state, the first fan 12 takes indoor air from the first air suction port 2, and sucks the harmful gas sucked from the air outlet 9 out together, and sends out the harmful gas from the air curtain air supply port 1 at the speed of 1.5m/s, and a vertical air curtain is formed at the right side of the sickbed. It should be noted that the air curtain on the right side of the sickbed is mainly supplied by the indoor air extracted from the first air extraction opening 2, and the air extracted from the air outlet 9 only occupies a small portion.
Similarly, when the system supplies air at the right side and exhausts air at the left side, the states of the fan and the opening and closing valve which are opened and closed inside the air distribution box are completely opposite to the states of the left air supply and the right air exhaust, and the normally-opened fan is in a normally-opened state.
By taking fig. 1 as an example, the flow directions of the air flows of the system (left air supply and right air exhaust as examples) during the epidemic situation are described in detail.
In the left air distribution box 8, the second fan 13 of the second air suction opening 3 is started, and indoor air with high quality is sucked from the indoor air lake and enters the main air duct 5 after being filtered by the filter.
Air drawn from the indoor air lake is sent out from the horizontal air supply port 7 through the air duct in the air distribution box 8, and the angle of the grill of the horizontal air supply port 7 is adjusted to an appropriate angle, about 10 ° downward.
The air sent from the horizontal air blowing port 7 blows the harmful gas exhaled by the human body to the vicinity of the air outlet 9 of the right air distribution box 8, and the gas in the vicinity of the air outlet 9 of the right air distribution box 8 is sucked into the right air distribution box 8 by the action of the third fan 14 in the air outlet 9, passes through the air duct in the right air distribution box 8, and is discharged from the air port of the air curtain blowing port 1 of the right air distribution box 8.
The air curtain blowing ports 1 of the air distribution boxes 8 on the left and right sides send out the air sucked from the first suction ports 2 on the two sides from the vertical direction at the speed of 1.5m/s, and air curtains are formed on the two sides of the sickbed. The air sent out in the vertical direction from the right air distribution box 8 includes the ambient air of the human breathing zone sucked in from the air outlet 9 in addition to the air drawn in from the first air suction port 2.
Two room return air inlets 4 are arranged on the ceiling right above the air curtain air supply outlets 1 of the left and right air distribution boxes 8, and the air sent out from the air curtain air supply outlets 1 of the left and right air distribution boxes 8 enters the room return air inlets 4 as the return air of a conventional air conditioning system.
Preferably, the separate hood 15 is not activated during periods of non-epidemic use.
By taking fig. 2 as an example, the flow directions of the air flows of the system during the epidemic situation are described in detail (taking left air supply and right air exhaust as examples).
In the left air distribution box 8, the second fan 13 of the second air suction opening 3 is started, and indoor air with high quality is sucked from the indoor air lake and enters the main air duct 5 after being filtered by the filter.
Air drawn from the indoor air lake is discharged from the horizontal air supply port 7 through the air duct line in the air distribution box 8, and the angle of the grill of the horizontal air supply port 7 is adjusted to an appropriate angle, about 10 ° downward.
The air sent from the horizontal air blowing port 7 blows the harmful gas exhaled by the human body to the vicinity of the air outlet 9 of the right air distribution box 8, and the gas in the vicinity of the air outlet 9 of the right air distribution box 8 is sucked into the right air distribution box 8 by the action of the third fan 14 in the air outlet 9, passes through the air duct pipe in the right air distribution box 8, and is discharged from the air curtain blowing port 1 of the right air distribution box 8.
The air curtain blowing ports 1 of the air distribution boxes 8 on the left and right sides send out the air sucked from the first suction ports 2 on the two sides from the vertical direction at the speed of 1.5m/s, and air curtains are formed on the two sides of the sickbed. The air sent out in the vertical direction from the right air distribution box 8 includes the ambient air of the human breathing zone sucked in from the air outlet 9 in addition to the air drawn in from the first air suction port 2.
An independent exhaust hood 15 is arranged in the middle above the sickbed head, and air sent out from the air curtain air supply outlets 1 of the air distribution boxes 8 on the left side and the right side is sucked by the independent exhaust hood 15 and then is exhausted out of a room after centralized treatment.
Preferably, during an epidemic, both room return air inlets 4 are closed and the air conditioning system does not use return air.

Claims (10)

1. A ward air curtain system for air supply and exhaust is characterized by comprising air distribution boxes (8), room air return ports (4) and independent exhaust hoods (15) which are oppositely arranged on two sides of a sickbed, wherein the two air distribution boxes are identical in structure, the top of each air distribution box is provided with an air curtain air supply port (1), the bottom of each air distribution box is provided with a second air suction port (3), one side of each air distribution box, which is far away from the sickbed, is provided with a first air suction port (2), one side of each air distribution box, which is close to the sickbed, is provided with a horizontal air supply port (7) and an air exhaust port (9), the horizontal air supply port (7) is arranged above the air exhaust port (9), all air ports are communicated through air pipes arranged in the air distribution boxes (8), a first opening and closing diversion valve (10) is arranged at the communication position of the air pipes and the horizontal air supply ports (7), and a second opening and closing diversion valve (11, a first fan (12) is arranged in the air curtain air supply opening (1), a second fan (13) is arranged in the second air suction opening (3), and a third fan (14) is arranged in the air outlet (9); the air sent out by the air curtain air supply outlet (1) enters an independent exhaust hood (15) or a room air return inlet (4).
2. A ward ventilating air curtain system according to claim 1, wherein there are two of said room air return openings (4), said room air return openings (4) being provided in the ceiling directly above said air curtain ventilating opening (1); the independent exhaust hood (15) is arranged above the bed head of the sickbed.
3. The air curtain system for sending and exhausting air in a ward of claim 1, wherein the first fan (12) is a normally open fan, and the second fan (13) and the third fan (14) are both open and closed fans.
4. The ward air curtain system for sending and exhausting air according to claim 1, further comprising an infrared camera (16) and a controller, wherein the infrared camera (16) is arranged on one side of the air distribution box (8) close to the sickbed, the controller is arranged in the air distribution box (8), the infrared camera (16) is used for capturing the posture of the patient, and the controller is used for controlling the opening and closing of the pipeline fan and the positions of the first opening and closing diversion valve (10) and the second opening and closing diversion valve (11) according to the posture of the patient.
5. The ward air curtain system for sending and exhausting air in a ward according to claim 1, wherein the air ducts comprise a main air duct (5) and branch air ducts (6), the second air suction opening (3) is communicated with the air curtain air supply opening (1) through the main air duct (5), a first air suction opening (2) is arranged at a section of the main air duct (5) close to the air curtain air supply opening (1), the main air duct (5) is connected with two branch air ducts (6), the two branch air ducts (6) are respectively communicated with the horizontal air supply opening (7) and the air outlet (9), and a first opening and closing diversion valve (10) and a second opening and closing diversion valve (11) are respectively arranged at the communication position of the two branch air ducts (6) and the main air duct (5).
6. The air curtain system for air supply and exhaust in ward of claim 1 or 5, wherein the first opening and closing diversion valve (10) and the second diversion valve (11) are connected with the air pipe through flanges, and the main components of the first opening and closing diversion valve (10) and the second diversion valve (11) are an streamline valve plate.
7. The air curtain system for air ventilation of ward of claim 1, wherein the first air suction opening (2) and the second air suction opening (3) are both provided with filters, and the filters are medium-efficiency or high-efficiency filters.
8. The air curtain system for air supply and exhaust in ward of claim 1, wherein the air curtain supply opening (1), the horizontal supply opening (7) and the air outlet (9) are all slit type grid openings, the angle of the grid is adjustable, and the horizontal supply opening (7) are the same as the size of the air outlet (9).
9. A hospital room air curtain system for ventilating air according to claim 1, wherein said air curtain supply opening (1) has a wind speed of 1.5m/s to 2.0m/s and said horizontal air supply opening (8) has a wind speed of 0.15m/s to 0.22 m/s.
10. The use method of the air curtain system for air supply and exhaust in ward of any one of claims 1 to 9, wherein, taking the patient lying on the right side as an example, when in use, the second fan (13) is turned on in the air distribution box on the left side, the second fan (13) pumps the indoor air to the second air suction port (3), the air enters the air pipe, the second opening and closing diverter valve (11) is adjusted to close the air pipe leading to the air outlet (9), and the third fan (14) is turned off; adjusting a first opening and closing diversion valve (10), opening an air pipe leading to a horizontal air supply outlet (7), sending air in the air pipe out of the horizontal air supply outlet (7), opening a first fan (12), extracting indoor air from a first air suction opening (2) by the first fan (12), sending the air out of an air curtain supply outlet (1) to an independent exhaust hood (15) or a room return air opening (4), and forming an air curtain on the left side of the sickbed; in the right air distribution box, a first fan (12) and a third fan (14) are started, a second opening and closing diversion valve (11) is adjusted, an air pipe leading to an air outlet (9) is opened, a first opening and closing diversion valve (10) is adjusted, and the air pipe leading to a horizontal air supply outlet (7) is closed; the first fan (12) extracts indoor air, the third fan (14) extracts air sent out by the horizontal air supply outlet (7) of the left air distribution box and harmful gas exhaled by a human body and enters the right air pipe, the air sent out by the horizontal air supply outlet (7) of the left air distribution box, the harmful gas exhaled by the human body and the indoor air are all sent out to the independent exhaust hood (15) or the room return air inlet (4) from the air curtain supply outlet (1), and an air curtain is formed on the right side of the sickbed; when the patient lies on the left side, the air operation condition in the air distribution boxes (8) on the two sides of the sickbed is opposite to that when the patient lies on the right side.
CN202110309212.8A 2021-03-23 2021-03-23 Air curtain system for air supply and exhaust in sickroom and use method thereof Pending CN112856671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110309212.8A CN112856671A (en) 2021-03-23 2021-03-23 Air curtain system for air supply and exhaust in sickroom and use method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110309212.8A CN112856671A (en) 2021-03-23 2021-03-23 Air curtain system for air supply and exhaust in sickroom and use method thereof

Publications (1)

Publication Number Publication Date
CN112856671A true CN112856671A (en) 2021-05-28

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113237179A (en) * 2021-06-24 2021-08-10 河南省肿瘤医院 Multi-person ward air purification system and method
JP2023020836A (en) * 2021-07-29 2023-02-09 兵庫県公立大学法人 Indoor atmosphere purification system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113237179A (en) * 2021-06-24 2021-08-10 河南省肿瘤医院 Multi-person ward air purification system and method
JP2023020836A (en) * 2021-07-29 2023-02-09 兵庫県公立大学法人 Indoor atmosphere purification system
JP7320799B2 (en) 2021-07-29 2023-08-04 兵庫県公立大学法人 Indoor atmosphere purification system

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