A ventilation system is provided, the ventilation system comprising at least one air flow generating device, the at least one air flow generating device having a calibrated speed to produce a downward air flow capable of forcing a cloud of infectious bacterial, viral or pathogen particles or droplets out of an ingestion zone of a mouth, a nose and eyes of an individual, at least one ultraviolet C light lamp positioned proximate at least one wall of an area in a pathway of an infected air flow, the infected air flow containing the cloud of infectious bacterial, viral or pathogen particles or droplets, an ultraviolet C radiation field created by the at least one ultraviolet C light lamp, the ultraviolet C radiation field extending throughout the area from the at least one wall near a ceiling of the area and the infected air flow containing the cloud of infectious bacterial, viral or pathogen particles or droplets passing through the ultraviolet C radiation field, wherein the at least one air flow generating device is positioned to enable an upward air flow return to the at least one air flow generating device to force the infected air flow and the cloud of infectious bacterial, viral or pathogen particles or droplets out of an area and through the ultraviolet C radiation field to eradicate the infectious bacteria, virus and pathogens from the infected air flow, and wherein a fresh air flow free of infectious bacteria, viruses and pathogens is reintroduced back into the area by the downward air flow of the at least one air flow generating device.

A ventilation system is provided, the ventilation system comprising at least one air flow generating device, the at least one air flow generating device having a calibrated speed to produce a downward air flow capable of forcing a cloud of infectious bacterial, viral or pathogen particles or droplets out of an ingestion zone of a mouth, a nose and eyes of an individual, at least one ultraviolet C light lamp positioned proximate at least one wall of an area in a pathway of an infected air flow, the infected air flow containing the cloud of infectious bacterial, viral or pathogen particles or droplets, an ultraviolet C radiation field created by the at least one ultraviolet C light lamp, the ultraviolet C radiation field extending throughout the area from the at least one wall near a ceiling of the area and the infected air flow containing the cloud of infectious bacterial, viral or pathogen particles or droplets passing through the ultraviolet C radiation field, wherein the at least one air flow generating device is positioned to enable an upward air flow return to the at least one air flow generating device to force the infected air flow and the cloud of infectious bacterial, viral or pathogen particles or droplets out of an area and through the ultraviolet C radiation field to eradicate the infectious bacteria, virus and pathogens from the infected air flow, and wherein a fresh air flow free of infectious bacteria, viruses and pathogens is reintroduced back into the area by the downward air flow of the at least one air flow generating device.

Provided is a sneeze guard attachment for creating an air curtain between display food covered by a sneeze guard and a person. The device includes a panel, a frame affixed to the panel that creates a chamber between the panel and the sneeze guard, and a means for forcing air into the chamber. The chamber includes an open end, which allows the air to be forced out of the chamber in order to create an air curtain. The air curtain separates the display food contained in a food bar/food prep area from the consumer. The device can be retrofitted on any preexisting food shield or sneeze guard, and can be utilized with various types of display food, including food items found in buffets, salad bars, hot food bars, roller grills, made-to-order food operations, catering stands, roller grills, sandwich preparation areas, and the like.

Provided is a sneeze guard attachment for creating an air curtain between display food covered by a sneeze guard and a person. The device includes a panel, a frame affixed to the panel that creates a chamber between the panel and the sneeze guard, and a means for forcing air into the chamber. The chamber includes an open end, which allows the air to be forced out of the chamber in order to create an air curtain. The air curtain separates the display food contained in a food bar/food prep area from the consumer. The device can be retrofitted on any preexisting food shield or sneeze guard, and can be utilized with various types of display food, including food items found in buffets, salad bars, hot food bars, roller grills, made-to-order food operations, catering stands, roller grills, sandwich preparation areas, and the like.

A testing apparatus including a base and a preheating unit arranged on the base is provided. The preheating unit includes a gas generator, a blocking mechanism and a heating device. The gas generator is configured to discharge air toward the base to form an air wall. The blocking mechanism is located above the air wall and forms a heat preservation space with the air wall. The heating device is arranged in the heat preservation space.

An object of the present invention is to provide a safety cabinet capable of controlling the purity during usage. In order to realize the object, the safety cabinet is configured to include an operation space including an operation stage; a front panel formed in a front surface of the operation space; an operation opening provided in a lower portion of the front panel; a suction port that is provided in the vicinity of the operation opening on a front side of the operation stage to lead downward; an air circulation path through which air suctioned from the suction port flows along a lower portion, a back surface, and an upper portion of the operation space; a particle counter; an operation space-air intake port provided in the operation space to take air into the particle counter; and an introduction pipe that introduces the air into the particle counter from the operation space-air intake port.

The present disclosure relates to a multi-stage dehumidification system for local area dehumidification of dry room, the system including a main dehumidification part formed to have an inside space that is sealed from outside; a main dehumidifying device for controlling that the relative humidity of the inside of the main dehumidification part is smaller than the relative humidity of the outside of the main dehumidification part; at least one local area dehumidification part that is partitioned within the main dehumidification part, and that has an inside space that is sealed from the main dehumidification part; and a local area dehumidifying device for controlling that the relative humidity of the inside of the local area dehumidification part is smaller than the relative humidity of the inside of the main dehumidification part, wherein the local area dehumidification part includes an opening for entry and exit of objects; a moisture penetration prevention part that protrudes to outside from an edge of the opening; and a first air curtain part that forms a first blocking air flow from one side of an outer opening of the moisture penetration prevention part towards the other side.

The present disclosure relates to a multi-stage dehumidification system for local area dehumidification of dry room, the system including a main dehumidification part formed to have an inside space that is sealed from outside; a main dehumidifying device for controlling that the relative humidity of the inside of the main dehumidification part is smaller than the relative humidity of the outside of the main dehumidification part; at least one local area dehumidification part that is partitioned within the main dehumidification part, and that has an inside space that is sealed from the main dehumidification part; and a local area dehumidifying device for controlling that the relative humidity of the inside of the local area dehumidification part is smaller than the relative humidity of the inside of the main dehumidification part, wherein the local area dehumidification part includes an opening for entry and exit of objects; a moisture penetration prevention part that protrudes to outside from an edge of the opening; and a first air curtain part that forms a first blocking air flow from one side of an outer opening of the moisture penetration prevention part towards the other side.

A purge controlling system includes a purge module and a control module. The purge module is arranged in the load port and is electrically connected with the control module. The purge module includes an air curtain unit, a flow control unit and a sensing unit. The control module controls the purge module to provide adequate gas flow of purge gas into the air curtain unit and form a gas curtain according to the displacement value of the door assembly.

A purge controlling system includes a purge module and a control module. The purge module is arranged in the load port and is electrically connected with the control module. The purge module includes an air curtain unit, a flow control unit and a sensing unit. The control module controls the purge module to provide adequate gas flow of purge gas into the air curtain unit and form a gas curtain according to the displacement value of the door assembly.