Clean booth

Abstract

To provide a clean booth that effectively exhibits functions of sterilization on various bacteria and dust removal while securely ensuring safety to human bodies by means free of an environmental load.SOLUTION: A clean booth consists of a housing body 1, a partition member 2, an opening / closing door, a main body space 4, a vertical column 5, a horizontal support part 6, a filter box 7, a high-performance filter 8, a pre-filter 9, an air blowing fan 10, an LED 11 for sterilization, a control part, and a display part. The clean booth thus constituted as mentioned above allows a user to open the opening / closing door for work to place or confirm an article to enter the main body space 4, and then exit from the space and close the door after the work. Then the air blowing fan 10 arranged in the vertical column 5 or the filter box 7 starts blowing air according to a programmed procedure of the control part, and at the same time all LEDs 11 for sterilization turns on to start irradiation continuously until previously set time, so that dust removal and sterilization are carried out while the air in the main body space of the housing is circulated.SELECTED DRAWING: Figure 1

Description

[0001] The present invention relates to a clean booth in which articles and instruments are stored within the space defined by the partition members of the housing body, in which the housing body has a partition member facing the indoor and outdoor sides, the frame of which is controlled to a predetermined cleanliness level, and which is connected to a plurality of vertical supports and horizontal supports. In particular, the present invention relates to a clean booth with sterilization and dust removal functions that improves the effectiveness of sterilization and dust removal within the space within the housing body. [Background technology]

[0002] In clean room facilities such as pharmaceutical factories, factories that manufacture precision parts such as semiconductors, various research laboratories, and food factories, a partition is required between a space where a certain level of cleanliness is controlled and an outside space where the level of cleanliness is different. Clean booths are used to prevent bacteria, microorganisms, dust, etc. from entering this space where cleanliness must be controlled from outside. [Prior art documents]

[0003] [Patent Document 1] Patent No. 6944735 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-336798 discloses a clean booth that can properly sterilize the inside of the booth by irradiating the inside of the booth with ultraviolet light. The solution comprises an enclosure 10 that surrounds the top and sides of the target space to be irradiated with ultraviolet light, and this enclosure 10 is made up of a sheet 101 that reflects ultraviolet light. As a result, the ultraviolet light irradiated into the target space, i.e., the inside of the enclosure 10, is reflected inside by the enclosure 10 made up of sheet 101, and the irradiated ultraviolet light can be used efficiently to appropriately sterilize the target space within the booth. The main selling point of the above-mentioned Patent Document 1 is that an enclosure is provided that surrounds the target space where ultraviolet light is irradiated to effectively irradiate the germicidal lamp installed in the clean booth, and the enclosure is made of a sheet that reflects ultraviolet light. This germicidal lamp is called an ultraviolet lamp, and because it contains mercury and has a large environmental impact, its manufacture and sale are currently being restricted. Furthermore, ultraviolet germicidal lamps are harmful when their light directly hits the skin or eyes of the human body, so special consideration is required for the human body, but no measures are taken to prevent operator error. Furthermore, there is no air circulation function within the target space or a high-performance filter to remove dust from the space. Patent Document 2 aims to provide a clean booth that can be installed in a general building and has an extended filter life. The clean booth 1 is configured so that air that has been sterilized and dust-free through a filter 5 is blown into a room S2, and the air in the room S2 is returned to the upstream side of the filter 5 through circulation paths 8 and 10. The clean booth in Patent Document 2 is characterized only by the fact that it is configured to blow air that has been filtered to sterilize and remove dust into the room, and that the air in the room is returned to the upstream side of the filter through a circulation path. Furthermore, although it has the function of sterilization and dust removal by capturing bacteria on the filter surface, it does not have a sterilization function by other effective means, and its sterilization effect is limited. Summary of the Invention [Problem to be solved by the invention]

[0004] The clean booths described in the above-mentioned prior art documents 1 and 2 are primarily focused on effectively irradiating the germicidal lamp into the space and only provide a method for circulating air through a filter. In light of resolving the issues described in the prior art documents 1 and 2, the present invention provides a clean booth that uses an environmentally friendly sterilization method to inactivate and sterilize various viruses and bacteria in a manner that is safe for the human body, while also having a dust removal function that reduces the amount of germs present within the booth space to dust. In particular, this technology focuses on achieving sterilization and dust removal functions while ensuring safety for human skin and eyes. This technology takes into consideration the safety of the human body, as direct exposure of ultraviolet light to the human body due to misoperation, whether from a lamp or LED, poses a safety risk.

[0005] The deep ultraviolet LED used in this invention has a wavelength range of 220 to 300 nm, and university research institutes and companies have demonstrated that its inactivation and sterilization effect on the new coronavirus and all common bacteria is over 99% under certain conditions, and this has been published in papers and other publications. [Means for solving the problem]

[0006] The clean booth of the present invention relates to technology for storing items in a space where cleanliness is controlled, particularly in pharmaceutical manufacturing plants, semiconductor and electronic component precision equipment factories, various research facilities, food factories, etc. In this case, the space where cleanliness must be controlled is an indoor space isolated from the surrounding atmosphere and controlled to a certain level of cleanliness, and in addition to strict dust removal, sterilization is also required. The clean booth of the present invention is characterized by using sterilization LEDs that can sterilize without putting a burden on the environment, which are placed in the air circulation path to perform sterilization function and simultaneously perform dust removal with a high-performance filter through air circulation. An embodiment of the clean booth of the present invention will be described. The clean booth of the present invention is composed of a housing main body 1, a partition member 2, an opening / closing door 3, a main body space 4, vertical support columns 5, horizontal support members 6, a filter box 7, a high-performance filter 8, a pre-filter 9, a blower fan 10, a sterilization LED 11, a control unit 12, and a display unit 13. In the clean booth configured as described above, a user opens the access door 3 and enters the main body space 4 to place an item, and then closes the access door 3. Next, according to a procedure programmed in the control unit 12, the blower fan 10, located somewhere between the vertical support 5 and the filter box 7, begins blowing air, and at the same time, all of the sterilization LEDs 11 light up and begin irradiating, continuing to operate until the pre-set time. As described above, during the setting period, the blower fan continues to blow air and all of the sterilization LEDs light up and begin irradiating, circulating the air within the main body space inside the enclosure body while removing dust and sterilizing bacteria. [Effects of the Invention]

[0007] According to the present invention, for example, when a worker enters the main space of a clean booth to place or check an item, the main space can be sterilized and dust-free beforehand. Furthermore, air is constantly drawn into the main space through a pre-filter located at the bottom of the vertical support column by the operation of the blower fan, and the passing air is sterilized by the light emitted from the sterilization LEDs attached to the inner walls of the vertical support column and horizontal support section. The sterilization LEDs irradiate the passing air within the enclosed space within the vertical support column and horizontal support section to sterilize it, preventing the emitted light from leaking to the outside and ensuring human safety even when people are present inside the main space. Furthermore, the air blown by the blower fan is sterilized by the sterilization LEDs attached to the upper inner wall of the ceiling section, even if bacteria are trapped on the suction surface of the high-performance filter in the filter box. This provides a total of two stages of bacterial sterilization, enhancing the sterilization effect. The sterilization LEDs installed on the ceiling of this filter box are always irradiated onto the collection surface of the high-performance filter in a sealed space, so there is no light leakage and it is safe for the human body. There is also no need to worry about the ultraviolet light hitting the human body due to operator error. In addition to sterilization, dust that may be floating within the main body space is also filtered by the high-performance filter as the air circulates inside the main body space, which has the effect of increasing the cleanliness within the main body space. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front cross-sectional view of a clean booth according to an embodiment of the present invention; [Figure 2] Front view of a clean booth according to an embodiment of the present invention [Figure 3] 1 is a plan view of a clean booth according to an embodiment of the present invention; [Figure 4] 1 is a diagram of a sterilization LED unit for a clean booth according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] A clean booth according to an embodiment of the present invention will be described below with reference to Figures 1 to 4. In all of the following drawings, the dimensions and proportions of each component are shown differently as appropriate to facilitate understanding. [Example]

[0010] 1 to 4, in this embodiment of the clean booth of the present invention, air in the main space 4 is sterilized by irradiation from sterilization LEDs 11 attached to the wall as it moves from the vertical support 5 through pre-filters 9 installed in the vertical support 5 to the space in the horizontal support 6 by the operation of blower fans 10. Bacteria that cannot be sterilized here are collected on the suction surface of high-performance filter 8 installed in the ceiling, where they are also sterilized by sterilization LEDs 11 installed at the top. This results in a total of two stages of sterilization, enhancing the sterilization effect. At the same time, high-performance filter 8 also has the effect of removing dust floating in the main space. [Industrial Applicability]

[0011] In industry, the present invention is used for storing items in a space controlled to a specific cleanliness level in a clean room where air cleanliness is required, such as in pharmaceutical manufacturing plants, bio-related facilities, various research institutes, precision equipment factories such as semiconductor factories, and food factories. When storing items in this clean booth, a controlled, predetermined cleanliness level is required, and at the same time, it is required that the effectiveness of sterilizing bacteria be exerted. Reference symbols: Housing body 1, partition member 2, opening / closing door 3, main body space 4, vertical support 5, horizontal support part 6, filter box 7, high-performance filter 8, pre-filter 9, blower fan 10, sterilization LED 11, indicator light 12, control box 13

Claims

1. A clean booth having a housing body consisting of a framework separating the indoor and outdoor areas, which are controlled to a predetermined cleanliness level, a box-shaped member made of a transparent member, an opening / closing door, and an air purification unit, characterized in that the clean booth is composed of: a plurality of vertical supports supporting the housing body, each having a hollow portion allowing air to flow through the interior; a pre-filter arranged on the indoor side of the vertical supports; a plurality of horizontal support members having hollow portions inside that are connected to the hollow portions of the vertical supports; a ceiling box member connected to the hollow portions of the horizontal support members; a high-performance filter arranged within the ceiling box member; a blower fan arranged somewhere from inside the vertical supports to the ceiling box member; and a plurality of sterilization LEDs arranged on the inner walls of the vertical supports, the inner walls of the horizontal support members, and the upper part of the inner wall of the ceiling box member.

2. 2. The clean booth according to claim 1, wherein the plurality of sterilization LEDs are deep ultraviolet LEDs emitting light with wavelengths ranging from 220 to 300 nm.

Images