Device and method for reducing spread of microorganisms and airborne health hazardous matter and/or for protection from microorganisms and airborne health hazardous matter
Disclosed is an air distribution control unit or a filtration/ventilation unit which is portable and/or can be mounted on or integrated in furniture e.g. as a cabinet of at the head region of a bed. The filtration/ventilation unit cleanses air from a person/patient by aspirating the person's/patient's exhalation air into the filtration/ventilation unit. To construct an at least partly isolated area around the patient, filtered air can be directed e.g. vertically out of the filtration/ventilation unit to perform an air curtain. Use of the filtration/ventilation unit reduces the risk of dissipation of air-borne diseases and health hazardous matter, and reduces the amount of air to ventilate a room with patients.
1. A method for partly isolating an area of a bed having a head region, said method comprising:
localising an area which is to be partly isolated,
providing at least one filtration/ventilation unit around or in connection to said area, wherein said filtration/ventilation unit is an integrated part of said bed or releasably mounted on said bed,
aspirating air from said area into said at least one filtration/ventilation unit, and cleaning said air inside the filtration/ventilation unit,
directing cleansed air out of said at least one filtration/ventilation unit in a horizontal to upward direction, thereby forming an air curtain of upwardly flowing air, extending within 20° into or away from the area with respect to vertical extensions of the sides of the bed, thereby
partly isolating the area and removing microorganisms or viruses in air from the area.
2. A bed with at least one filtration/ventilation unit located at least at a region of a bed, where said at least one filtration/ventilation unit is an integrated part of said bed or said at least one filtration/ventilation unit is releasably mounted on said bed such that said at least one filtration/ventilation unit can be repositioned together with said bed and be raised and lowered together with said region, said at least one filtration/ventilation unit being adapted to isolate a subject lying in the bed from the surroundings by generating at least one air curtain of upwardly flowing cleansed air, and being adapted to aspirate and clean contaminated air from said region.
3. The bed according to claim 2 , having a head region and comprising at least two filtration/ventilation units, said ventilations units being located at least one filtration/ventilation unit at each side of said head region of said bed and/or further comprising a filtration/ventilation unit at at least one end of the bed.
4. The bed according to claim 2 , wherein said at least one filtration/ventilation unit is connected to said bed so as to allow adjustment of the unit in the direction up/down and/or forward/backward relative to the bed.
5. The bed according to claim 2 , wherein said bed is a bed for prolonged rest of a human.
6. The bed according to claim 2 , wherein said at least one filtration/ventilation unit produces an air curtain across the bed between an air slot directing air out of a filtration/ventilation unit and an air slot directing air into a filtration/ventilation unit thereby isolating at least part of the bed from the surroundings.
7. The bed according to claim 2 , wherein said filtration/ventilation unit further comprises
means for controlling the direction of the outlet air and/or
means for controlling the velocity of the outlet air.
8. A method for protecting personnel working with at least one patient by establishing at least one air curtain produced by a filtration/ventilation unit of claim 1 between the patient and the personnel.
9. The bed of claim 2 , wherein the air curtain is vertical upward or diagonal upward.
10. The bed of claim 2 , wherein the air curtain is horizontal.
11. The bed of claim 2 , wherein the at least one filtration/ventilation unit comprises a source of electromagnetic radiation capable of disinfecting contaminated air.
12. The bed of claim 2 , wherein the at least one filtration/ventilation unit comprises a filter for cleaning contaminated air.
13. The bed of claim 2 , wherein the ventilation/filtration unit comprises sensors to determine the position of a subject's head and is capable of regulating the direction or velocity of air in response to the sensors' determination.
14. The bed of claim 2 , wherein the ventilation/filtration unit provides the isolated region with gas of a controlled composition.
15. The bed of claim 2 , wherein the ventilation/filtration unit is capable of drying and humidifying air supplied to the isolated region.
16. The method according to claim 1 , wherein the area to be partly isolated is the head region of the bed.