JPH0725937U - Air curtain type fume hood - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an air curtain fume hood capable of easily and quickly performing inspection and maintenance work of a lighting device that illuminates a processing chamber partitioned and formed in the main body. [Structure] A lighting fixture 5 is arranged above a processing chamber 3 defined on a workbench 2 installed in the main body 1 through a top plate 4, and the lighting fixture 5 on the top plate 4 and a partition wall. An air curtain fume hood in which an air curtain can be freely formed in the working opening 9 of the processing chamber 3 by the outside air that is pressure-fed from the air supply port 11 provided on the lower surface of the adjacent air supply boxes 10 via the portion 12. In the partition wall portion 12 that separates the air supply box 10 and the lighting fixture 5 on the top plate portion 4,
Opening 12 required for maintenance and inspection of the lighting fixture 5
A is provided, and the opening 12a is closed by the adherend 15 which is detachably attached to the partition wall 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air curtain type fume hood, and more particularly to an air curtain type fume hood that enables simple and quick maintenance and inspection of a lighting device arranged to illuminate a processing chamber in a main body. .

[0002]

[Prior art]

 Fume hoods (including draft chambers) are devices installed in chemical laboratories, etc. in order to ensure the safety and health of workers, and odors generated by various chemical experiments performed in the processing chamber of this equipment. It is used for the purpose of efficiently discharging toxic gas, etc. out of the room without leaking and diffusing into the laboratory through the work opening provided on the front surface.

Regarding the above-mentioned fume hood used for such a purpose, in order to prevent leakage of odors and toxic gases into the laboratory, it is necessary to keep the inside of the processing chamber under negative pressure at all times. However, keeping negative pressure in the processing chamber means that a large amount of costly conditioned air that is supplied to the laboratory is also drawn in at the same time, which is an economic improvement. There was room.

FIG. 2 shows that an expensive air-conditioning air supplied to the laboratory is prevented from uneconomically flowing out by forming an air curtain in the working opening located in the front of the processing chamber. An example of such an air curtain fume hood is shown.

According to FIG. 1, a lighting fixture 5 is installed above a processing chamber 3 defined on a workbench 2 installed in the main body 1 via a top plate portion 4. The lighting fixture 5 illuminates the workbench 2 through the cover glass 6.

Further, in the front surface of the processing chamber 3 in the main body 1, there is formed a working opening 9 which is opened and closed by an observation door 8 which is vertically movable. An air supply box 10 including a filter 13 and a punching board 14, in addition to an air supply port 11 opened downward, is provided on the upper side of the top by means of a partition wall 12 so that the above-mentioned certifying device on the top plate 4 is shown. 5 is arranged so as to be adjacent to 5.

In the air curtain type fume hood having the above structure, when it is desired to maintain or inspect the lighting fixture 5 installed on the top plate 4, the ceiling side of the main body 1 is usually used. Is performed by removing the cover glass 6 facing the processing chamber 3 or the like.

[0008]

[Problems to be solved by the device]

 By the way, in the air curtain type fume hood shown in FIG. 2, maintenance work of the lighting fixture 5 installed on the top plate portion 4 by approaching from the ceiling side of the main body 1 or removing the cover glass 6 is performed. You can do it.

However, in the case of approaching from the ceiling side of the main body 1 for maintenance and inspection of the luminaire 5, it is necessary to secure a sufficient working space with the ceiling of the laboratory. If the ceiling of the room is low and a sufficient work space is not secured between the ceiling and the top plate 4, there is an inconvenience that this cannot be done.

The above inconvenience can be avoided by removing the cover glass 6 facing the processing chamber 3 and performing maintenance and inspection of the lighting fixture 5.

However, the detachment of the cover glass 6 each time it is necessary is to hold the cover glass 6 in order to prevent the highly corrosive gas component filling the processing chamber 3 from entering the lighting device 5 side. This means that the airtightness that must be reduced is impaired, and there is a problem that the airtightness on the side of the top plate 4 that must be secured between the processing chamber 3 and the processing chamber 3 cannot be maintained.

The present invention has been made in view of the above problems found in conventional air curtain type fume hoods, and an object of the present invention is to provide a lighting fixture that illuminates a processing chamber partitioned and formed in the main body. It is to provide an air curtain type fume hood that allows easy and quick inspection and maintenance work.

[0013]

[Means for Solving the Problems]

 The present invention is intended to achieve the above-mentioned object, and its structural feature is to provide an illuminator device through a top plate portion above a processing chamber defined on a workbench installed in the main body. The air curtain is formed in the work opening of the processing chamber by the outside air that is pressure-fed from the air supply port provided on the lower surface of the air supply box that is adjacent to the lighting fixture on the top plate through the partition wall. In a flexible air curtain fume hood, the partition wall that separates the air supply box and the lighting equipment on the top plate is provided with an opening necessary for maintenance and inspection of the lighting equipment. The opening is closed by the adherend which is detachably attached to the section.

[0014]

[Action]

 For this reason, when it becomes necessary to maintain and inspect the lighting fixtures on the ceiling plate, the adherend that covers the opening of the partition wall is removed from the air supply port side of the air supply box, and the lighting is immediately illuminated. Maintenance and inspection work can be performed on the equipment.

Moreover, the airtightness between the air supply box and the lighting device on the top plate that are adjacent to each other via the partition wall does not need to be kept as high as between the processing chamber and the compartment, It is sufficient to cover the opening with the adherend and close it after finishing the maintenance and inspection work for the lighting fixture, and it is possible to improve workability.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

The air curtain type fume hood according to the present invention has the same basic configuration as that shown in FIG. 2, and as is apparent from the figure, the workbench 2 installed in the main body 1 A ceiling plate 4 having a lighting fixture 5 installed on the upper surface thereof is provided above the processing chamber 3 partitioned and formed, and is adjacent to the lighting fixture on the ceiling plate 4 through a partition wall 12. The air supply box 10 can form an air curtain in the work opening 9 located in the front surface of the processing chamber 3 by the outside air pressure-fed from the air supply port 11 provided on the lower surface thereof.

In this case, the luminaire 5 is arranged on the top plate portion 4 so that the direction of the workbench 2 can be illuminated through the cover glass 6.

Moreover, the working opening 9 located on the front surface of the processing chamber 3 can be opened and closed by the observation door 8 which is arranged so as to be movable up and down, and is arranged above the working opening 9. The installed air supply box 10 is connected to a duct that introduces outside air supplied from a blower (not shown) through a connection portion 21, and an air supply port 11 that opens downward. An air curtain is formed in the working opening 9 by pumping the outside air.

FIG. 1 is an explanatory view showing an example of the structure between the air supply box 10 and the lighting equipment 5 installed on the top plate portion 4 in the air curtain type fume hood according to the present invention. The partition 12 that separates the air box 10 and the lighting fixture 5 on the top plate 4 is provided with an opening 12a necessary for maintenance and inspection of the lighting fixture 5.

The opening 12 a can be closed by fixing a plate-shaped adherend 15 that is detachably attached to the partition 12 via a screw member 16.

Further, in the air supply box 10, a filter 13 that purifies the introduced outside air and averages the air supply pressure inside the air supply box 10, and punching that distributes the outside air that has passed through the filter 13 more evenly The boards 14 are sequentially arranged from the upstream side.

The arrangement structure of the filter 13 in the air supply box 10 in this case is such that the L-shaped support members 18 and 18 are provided at the facing portion of the front plate 17 and the adherend 15 in the air supply box 10. It is arranged by being fixedly arranged, and by mounting the filter 13 on these supporting members 18, 18.

Further, the arrangement structure of the punching board 14 in the air supply box 10 is such that the front side plate 17 located below the support member 18 and the adherend 15 have L-shaped support members 19 and 19. Is fixedly arranged with the supporting member 19 on the side of the front side plate 17 positioned further downward, and the punching board 14 is fastened to these supporting members 19 and 19 by using the screw member 20. It is originally arranged.

Reference numeral 22 in the figure denotes a bypass gallery provided in the main body 1 for introducing conditioned air into the processing chamber 3 when the observation door 8 is pulled down and the work opening 9 is closed. Indicates.

Since the present invention is configured in this way, the air supply port of the air supply box 10 can be used when it is necessary to perform maintenance and inspection of the lighting device 5 installed on the top plate portion 4. First, the screw member 20 is removed from the side of 11 and the punching board 14 is removed from the support members 19 and 19.

Next, the filter 13 in the air supply box 10 is removed, and then the screw member 16 is removed to remove the adherend 15 covering the opening 12 a of the partition 12.

Thus, the air supply box 10 and the lighting fixture 5 on the top plate 4 communicate with each other through the opening 12a, and the opening 12a is used to perform necessary maintenance and inspection of the lighting fixture 5. You will be able to work.

After the necessary maintenance and inspection work is completed, the punching board 14 is attached to the support members 19 and 19 while sequentially performing the reverse operation procedure starting from covering the opening 12a with the adherend 15 and closing the same. You can finish all the work by fastening.

Therefore, the maintenance and inspection work for the lighting fixture 5 on the top plate portion 4 can be smoothly performed without approaching from the ceiling side of the main body 1 or removing the cover glass 6. In this case, the airtightness between the air supply box 10 and the lighting fixture 5 on the top plate 4 which are adjacent to each other via the partition wall 12 is also close to that between the processing chamber 3 and the lighting fixture 5 on the top plate part 4. Since it is not necessary to keep it high, inspection and maintenance work of lighting equipment can be performed easily and quickly, and workability can be improved.

[0031]

[Effect of device]

 As described above, according to the present invention, when it becomes necessary to maintain and inspect the lighting fixtures on the top plate, the adherend that covers the opening of the partition wall from the air supply port side of the air supply box By removing the, you can immediately perform maintenance and inspection work on the lighting equipment.

Moreover, the airtightness between the air supply box and the lighting device on the top plate portion that are adjacent to each other via the partition wall is kept higher than that between the processing chamber and the lighting device on the top plate portion. Since it is not necessary, it is sufficient to cover the opening with the adherend and close it after completing the maintenance and inspection work for the lighting fixture, and to improve workability.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part structure of an embodiment of an air curtain type fume hood according to the present invention.

FIG. 2 is an explanatory diagram showing a configuration example of an air curtain type fume hood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Workbench 3 Processing chamber 4 Top plate 5 Lighting fixture 6 Cover glass 8 Observation door 9 Working opening 10 Air supply box 11 Air supply port 12 Partition wall 12a Opening 13 Filter 14 Punching board 15 Adherent 16 Screw Material 17 Front plate 18, 19 Support material 20 Screw material 21 Connection part 22 Bypass gallery

Claims (1)

[Scope of utility model registration request] 1. A lighting fixture is arranged above a processing chamber defined on a workbench installed inside the main body via a top plate, and the lighting fixture on the top plate and a partition wall are interposed. In the air curtain type fume hood in which the air curtains can be freely formed in the working opening of the processing chamber by the outside air that is pressure-fed from the air supply port provided on the lower surface of the adjacent air supply boxes, on the air supply box and the top plate. The partition wall that separates the lighting fixture is provided with an opening necessary for maintenance and inspection of the lighting fixture, and the opening is closed by an adherend that is detachably attached to the partition. An air curtain type fume hood characterized by this.