JPS63180031A - Clean air supplier - Google Patents

Abstract

PURPOSE:To increase the intensity of illumination in a working space thereby to reduce the wattage of an illumination lamp and to prevent a temperature rise in a working chamber by forming a light transmitting part on the rear plate of members forming a workroom of the device. CONSTITUTION:An illumination lamp 13 and a sterilization lamp 17 are provided in the front and rear of the upper surface of a workroom supplied with clean air from a ceiling case 1 having an air cleaner, and works on a workbench are carried out under clean air without troubles. A light transmitting part 223 is provided on the rear plate 21 of the workroom 10 so that the work content is confirmed and light from the external part reaches the workbench 3. Accordingly, the confirmation of the work conditions is carried out without any hindrance on the operator and the wattage of the illumination lamp 13 can be reduced. By this arrangement the rise of the temperature within the workroom 10 can be reduced and drying and denaturing of samples can be removed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for supplying clean air to a work space, and in particular to a small tabletop clean workbench for experiments and research in biotechnology such as plant tissue culture. This invention relates to a clean air supply device suitable for use as a clean air supply device.

[Conventional technology]

A conventional cleaning workbench is equipped with a shutter that can be opened and closed on the front side as described in Japanese Patent Application Laid-open No. 59-213438, and has a see-through window and an airtight working means on the back side. It is configured to include.

This clean workbench is a biohazard clean workbench that handles substances that are highly dangerous to the human body, such as harmful substances and pathogens, and this configuration can be applied as is to a clean workbench for general work such as plant tissue culture. , the equipment becomes large-scale and has excessive specifications, resulting in high costs.

In addition, the clean workbench shown in the conventional example above is usually large and the workbench is deep, so the illumination inside the workbench is obtained from fluorescent lights or other lights installed on this clean workbench. performed exclusively by the device.

The see-through window on the back side is used by workers to look into the inside of the workbench, so it blocks the light from the light source in the room where the clean workbench is installed. The technical concept of letting in light from a window with a closed window is not disclosed in the above-mentioned conventional example.

Further, an example of a small table-top cleaning workbench is described in Japanese Patent Application Laid-Open No. 180400/1983. When such an apparatus is used for experiments such as tissue culture, a gas burner or the like is used to heat sterilize the instruments used inside. like this.

Traditional small clean workbench with gas burner.

As shown in FIG. 23, it is composed of a ceiling case 1, a back case 2, a workbench 3, etc., and outside air 4 is primarily processed by a pre-filter 5, and this air is supplied into a chamber 7 by a blower 6 and passed through a main filter 8. It is configured to perform secondary treatment and purification, and send clean air 9 into the working chamber 10. Gas piping 12 and lighting lamp 13 attached to gas burner 11 used for sterilization of instruments in work room 10
etc. are housed in a back case 2 formed with a double back plate.

Therefore, the total depth of the cleaning workbench body increases and the desk 14
There was a problem in that it occupied a large space when installed on top.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take space saving into consideration, and has the problem of occupying a large area on a desk. Furthermore, since a flexible pipe (usually a rubber hose or the like) from the gas pipe 12 on the back side to the gas burner 11 is provided inside the workbench, there is a problem in that the effective area inside the workbench becomes small. In addition, if the flexible piping between the When a sterilizing lamp is installed, the ultraviolet rays from the sterilizing lamp may deteriorate the flexible piping and cause a gas leak.

In addition, when the clean workbench in the conventional technology is installed on the wall side of the room, the gas cock 15 is located on the back side of the W case 2, so the gas hose connected to it may come off or break. Because it is on the back side of the stand, it is difficult to detect abnormalities, which not only makes it difficult to maintain and inspect, but also poses a risk of causing a serious accident.

In addition, the conventional technology does not take into account work using a microscope inside the workbench, and the microscope 16 installed on the workbench 3
When observing a sample, the front of the working chamber 10 is open and there is no pressure difference between the inside and the outside, so there is a problem that outside air 4 is easily drawn in and the cleanliness inside the room is reduced.

In addition, since the illumination light 13 is installed on the back wall of the work room, the distance from the light source to the microscope fi 16 is long.
There was also the problem that it was difficult to obtain a sufficient amount of light during observation. To solve this problem, the lighting lamp 13 (usually a fluorescent lamp)
The solution would be to increase the wattage of the lamp or increase the number of lamps, but this solution cannot simply be adopted in a small clean workbench due to dimensional constraints.

Moreover, even if this solution solves the light amount problem.

As the amount of heat generated by the illumination lamp increases, the temperature inside the workbench rises, causing problems such as drying of the sample and excessive deterioration due to temperature.

Furthermore, since the observation work using the microscope 16 is performed with the head of the worker 18 entering the work room 1o, there is a problem that the work is difficult and the work room 10 is contaminated by exudates from one worker 18. there were.

The purpose of the present invention is to provide excellent workability and space saving, facilitate maintenance and inspection of gas piping, prevent deterioration of flexible gas piping to gas burners due to ultraviolet rays, and provide excellent safety. An object of the present invention is to provide a clean air supply device.

[Means for solving problems]

The above purpose is to provide a ceiling case that houses an air purifying element that supplies clean air to a work space and is disposed above the work space, and a side plate that is formed on both sides, back, and front of the work space. In a clean air supply device comprising a back plate, a back plate, and a working opening, this is achieved by forming a light-transmitting portion in the back plate.

The above object also includes a ceiling case that houses an air purifying element that supplies clean air to the work space and is disposed above the work space, and a ceiling case that is formed on both sides, the back, and the front of the work space. A clean air supply device comprising a side plate, a back plate, and a working opening, wherein a distance maintaining means is provided on at least one of the outer surface of the ceiling case and the outer surface of the side plate, and the distance maintaining means is provided on at least one of the outer surface of the ceiling case and the outer surface of the side plate. This is achieved by configuring the device to maintain a predetermined distance from other devices installed adjacently.

According to a preferred embodiment, the spacing means is box-shaped and houses control means for a heat source used in the working space.

[Effect]

The spacing means provided on the side of the clean air supply device is
Other devices installed adjacent to this clean air supply device,
Alternatively, a space having a predetermined distance from the wall surface is formed. In a preferred embodiment, said spacing means houses control means for a heat source used within the workspace. Thereby, a heat source such as a gas burner can be stored in the space having the predetermined interval, and the flexible piping of the gas burner can be prevented from being deteriorated by the ultraviolet rays of the germicidal lamp.

Further, the light-transmitting portion formed on the back plate takes in light from outside the work space into the work space, thereby improving illuminance within the work space.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 22. FIG. 1 is a left perspective view of the clean air supply device in this embodiment, FIG. 2 is a right perspective view, FIG. 3 is a back perspective view, and FIG. 4 is a side sectional view.

The clean air supply device in this embodiment houses a blower 6, a chamber 7, and a main filter 8 as air purifying elements inside, and is purified by a ceiling case 1 with a pre-filter 5 attached to the top surface and the main filter 8. A work room 10 which is a work space where clean air is supplied, side plates 20 formed on both sides of the work room 10, a back board 21 formed on the back side of the work room 10, and a work room 10 provided on the bottom surface of the work room 10. It consists of a workbench 3 with a built-in design. Work room] The front of 0 is a work opening 10
A, and a front window 22 is provided above the working opening 10a.

The outside air 4 is primarily processed by a prefilter 5.

The air is supplied into a chamber 7 and pressurized by a blower 6, subjected to secondary processing by a main filter 8, purified, and sent into a working chamber 10 as clean air 9.

The inside of the work room 10 is being cleaned.

The ceiling case 1 is composed of a side plate 2o, a back plate 21, a workbench 3, etc., and a chamber 7 is provided in the ceiling case 1 to create a negative pressure inside the case and prevent contaminated air from flowing into the workroom 1° from inside the case. There is.

In this embodiment, the back plate 21 and side plate 2o are connected to the ceiling case 1.
By making it thinner and integrated with the back plate 21, the work area of the work room 10 is expanded, and the load of the blower 6, main filter 8, etc. installed above is supported by the vertical surfaces of the back plate 21 and side plate 20, increasing strength. ing.

The sterilizing lamp 17 located at the rear of the lower surface of the ceiling case 1 and the illumination lamp 13 located at the front are provided at a position below the main filter 8 on the side of the clean air outlet so as not to obstruct the flow of the clean air 9. The illumination light 13 is located in front of the upper and lower surfaces of the ceiling case 1, and the lower end of the front side of the ceiling case 1 blocks the light rays of the illumination light 13, which has the effect of preventing the glare of the illumination light 13 on the worker.

The transparent front window 22 located at the lower front of the ceiling case 1 prevents the inflow of outside air 4, maintains a positive pressure inside the work chamber 10 to obtain a cleaning effect, and prevents the transmission of ultraviolet rays emitted from the germicidal lamp 17. Safety is achieved by attenuating the amount.

In this embodiment, the workbench 3 is formed to protrude forward from one workroom 10.

Due to the front window 22, the opening area of the work opening 10a is reduced, so the blowing wind speed at that part increases, and clean air 9 is also obtained over the work table 3 protruding forward from the work room 10 due to the air curtain effect. be able to. FIG. 8 shows an example of how the cleaning workbench is used. Generally, the cleaning workbench is placed on a desk 27. Microscope 1 due to the aforementioned effect
6 into the work room 10, the microscope 16 is installed on the work table 3 protruding forward, and work can be done without worrying about obstacles such as the ceiling case 1 and side panels 20, improving work efficiency and safety. At the same time, contamination from the worker 18 can also be prevented. In addition, when the worker 18 works while sitting on a chair,
The space below the workbench 3 becomes wider, further improving work efficiency.

9 and 10 show modified examples of the workbench located at the lower part of the workroom 10. FIG.

FIG. 9 shows an example in which a movable workbench A57 that can be slid back and forth is configured to be stored inside the workbench 3, and FIG. 10 shows a movable workbench B58 that can be hoisted on the front edge of the workbench 3. It is something that According to the above modification, the external size of the clean workbench can be made small, so that the room in which the clean workbench is installed can be used effectively, and the cost of product packaging can be reduced.

Furthermore, since the movable working table 858 of the floating type can seal the working room 10, it is possible to prevent contaminants such as dust and insects from flowing in when not working.

In this embodiment, a back plate 23 is provided as a light-transmitting part on the back plate 21.
is formed.

FIG. 5 shows an example of the configuration of the back support 23 located at the back of the work room 1o. In this embodiment, an opening is provided in the back plate 21, and both sides of the translucent plate 23a are held down by the frame A29 through the backing A28, and the stud bolts 30 and nuts 31 are
It is fixed by

The translucent plate 23a is made of glass, acrylic, or the like, and in particular, if a germicidal lamp is used inside, glass that does not deteriorate due to ultraviolet rays is used. Translucent plate 2
3a does not necessarily have to be completely transparent, and may be glass that scatters or diffusely reflects light, such as frosted glass.
According to this, the light entering the work room 10 from the back 23 becomes almost uniform light over the entire surface, eliminating uneven illuminance within one work room 1o, so that the eyes of the workers are not tired, and the light entering the work room 10 from the back 23 becomes almost uniform. Since the back side of the work room 10 cannot be seen, one worker is not distracted, can work calmly, and work efficiency is improved.

In addition, if the translucent plate 23a is made transparent, it will not only allow sunlight to enter from the outside, but also allow the instructor to
6 can also monitor and give instructions from the back of the clean workbench without interfering with the work.

Further, the translucent plate 23a may be a half mirror,
According to this, when the outside of the workroom 10 is bright, external light enters the workroom 10 to increase the illuminance inside the workroom, and when the outside of the workroom 10 is dark, the light inside the workroom 10 is reflected. This reduces the amount of light transmitted to the outside and improves the internal illuminance.

Figures 6 and 7 show modified examples of the structure of debt.

In FIG. 6, a backing B 32 is wrapped around the opening of the back plate 21 in the shape of a frame, and a translucent plate 23a is attached therein to constitute the backing 23. On the other hand, since bolts, nuts, frames, etc. are not required, costs can be reduced.

FIG. 7 shows a modification in which a translucent plate 23a is inserted into a gap between a frame B33 provided around the opening of the back plate 21.A modification with zero translucent plates 23a can also reduce costs as described above. Further, in this modification, the light-transmitting plate 23a is provided in a detachable manner, so that it can be replaced with a light-transmitting plate having a different light transmittance or transparency depending on the work.

In this embodiment, the translucent plate 23a does not need to be one that transmits light of all wavelengths, but may be one that transmits light of a specific wavelength or that can absorb light of a specific wavelength. According to this, the wavelength of light and the working chamber 10
Research on the growth relationships of plants cultivated in
The growth of plants cultured in the work chamber 10 can be controlled by transmitting light of a specific wavelength.

In this embodiment, since light can be brought into the working room 10 from the backlight 23, the number of lighting lights 13 in one working room 10 can be reduced to the minimum necessary, and the external dimensions of the lighting lights 13 are small. Therefore, the clean air flow is not obstructed, and the space within the work chamber 10 can be used effectively.

In addition, since the wattage of the lighting lamp 13 in the work room 10 is small, the amount of heat generated is small. It is possible to prevent a temperature rise due to heat generation of the illumination lamp 13. As a result, the workbench 3 in the workroom 10
It is possible to prevent deterioration of the sample placed on top due to drying or temperature rise.

In this embodiment, the illumination light 13 is provided at the front side of the work room 10, so even when performing work such as observation using a microscope, it is close to the light source and can obtain sufficient illuminance. can.

When conducting experiments such as plant cultivation, research, etc. in the working room 10 of the clean air supply device in this embodiment.

Instruments such as tweezers used in the work room 1o are heat sterilized as needed, and a gas burner 11 is usually used as the heat source. In this embodiment, a gas piping unit 19 is provided as a heat source control means for controlling the supply of gas to the gas burner 11, and the gas piping unit 19 is detachably provided above the outer surface of the clean air supply device.

FIG. 11 shows the appearance of the gas piping unit 19. As shown in FIG. 13, the gas piping unit 19 is a unit in which a solenoid valve 34 and piping parts 35 are assembled inside the unit, and a gas cock 15° foot switch 36 and a power plug 37 are attached to the outside of the unit.

The outer surface of the unit has an opening 38, and the gas piping unit 19
In the event that a gas leak occurs inside the gas piping unit 19, the gas is released into the atmosphere through the opening 38 to prevent the gas from accumulating inside the unit and prevent a gas explosion. It also has the effect of preventing. The openings 38 may be provided on the upper and lower surfaces of the gas piping unit 19. As shown in FIG. 12, the unit is attached to the side surface of the case using the flange 39 and screws 40. Further, in this embodiment, it is fixed to the left side of the case, but it can be fixed to any side of the case depending on the customer's installation conditions. Although the gas piping unit 19 can be used in other ways,
In order to prevent accidents caused by different types of gas, as shown in Figure 12, protrusions 41 with different shapes depending on the type of gas are provided on the mounting surface of the unit, and corresponding holes are also provided on the case side. , it cannot be installed unless the two match. Incidentally, the case can be standardized by providing the light receiving section removably with a screw or the like. FIG. 14 is a diagram showing a state in which the gas piping unit 19 is attached to the left side of the case and the gas burner 11 connected to the gas piping unit 19 via the gas hose 26 is used in the work chamber 10.

FIG. 15 is a diagram showing a state in which the gas burner 11 is used for defecation. As in this embodiment, by disposing the gas piping unit 19 on the outer surface of the case, when the gas burner 11 is used for defecation, the gas burner 11 and the gas hose 2 connected thereto are
6 etc. are stored outside of work room 1o, so work room l
The space inside the room becomes wider, which improves workability indoors, improves work efficiency, and allows storage of a larger number of samples.

Further, it is possible to prevent the material of the gas hose 26 from deteriorating due to ultraviolet rays from the germicidal lamp 17.

In this embodiment, since the gas burner 11 is inserted into the work chamber from the side of the work opening 10a, the area occupied by the gas hose 26 in the work chamber 10 is small, and even when the gas burner 11 is moved, the gas hose 26 is not used for the work. The sample stored in the chamber 10 is not touched, improving workability and safety.

Furthermore, since the gas burner 11 is on the front side, sterilization work becomes easier.

In this embodiment, by unitizing the heat source control means, it is possible to produce only that unit and reduce costs, and by stocking the unit as an option, it is possible to quickly respond to short delivery times of products. Furthermore, as shown in FIG. 15, by making the front dimension W of the gas piping unit 19 larger than the diameter of the gas burner 11, when a plurality of clean air supply devices of this embodiment are arranged side by side to form a continuous line, The gas piping unit 19 functions as a spacing means for maintaining a predetermined spacing between adjacent clean air supply devices. In addition, gas piping unit 1
9 is provided above the outer surface of the clean air supply device, so that it is possible to prevent foreign objects and dust from falling from above into the space formed at a predetermined interval between the clean air supply devices. It can be used as a storage space for the gas burner 11.

FIG. 17 shows an example in which an opening 20a is provided below the side plate 20 of the cleaning workbench. Since the working chamber 10 is under positive pressure due to the opening 20a, clean air 9 is blown out from the opening 20a, and the surrounding area can also be cleaned. As a result, the side of the clean air supply device can also be used as a storage space for sample instruments, etc., and samples and instruments can be stored at a level with a lower degree of contamination than the outside air.

Figure 18 shows an example in which the clean air supply devices shown in Figure 17 are connected.As shown in the figure, when not working, a blind plate 42 is attached to the opening of the clean workbench, and the connecting space between the devices is 55 can obtain a better cleaning effect by blowing out clean air from the opening 20a.

Note that a wind shield plate (not shown) may be provided on the gas burner 11 as necessary to prevent fluctuation of the flame due to air currents.

Figure 16 shows gas burner 1 used for sterilizing samples and instruments.
This is an example in which an electric heater unit 54 is installed as a heat source instead of 1. When using this heater, a unit for controlling electric power is used in place of the gas piping unit 19 described above.

By using the electric heater unit 54, the sterilization heat source is unaffected by air currents, making it easier to handle and preventing flames, increasing safety.

It also eliminates the need for gas piping on the customer side, reducing costs and reducing installation costs. Safety is further increased because oxygen deficiency can be prevented in the environment.

Fig. 19 is a diagram showing how to attach the blind plate to the opening of the cleaning workbench, and Fig. 20 is a front view when the blind plate is attached.

As shown in this figure, the blind plate 42 used when not working is formed with hook holes 44 and handles 45 at the four corners.
4 are hooked at four places on the pins 43 located below the front window 22 and in front of the side plate 20.6 During work, the hooks are used at four places on the pins 43 located at the front of the ceiling case 1. Also, pins 4 are placed on the right side of the side plate 20 at the same pitch as the blind plate 42.
3 are arranged in four places, and can also be hooked on the side plate 20.

Only when the blind plate 42 is attached to the front window 22 is the interlock switch 46 located in front of the side plate 20 turned on the germicidal lamp 17.
The 0 circuit that enables lighting is as shown in FIG. 21, by turning the illumination light switch 48 toward the sterilizing light 17 side and attaching the blind plate 42, the t interlock switch 46 is pressed.
By turning on the germicidal lamp switch 47, the germicidal lamp 17 is turned on.

In this case, the illuminating light 13 cannot be turned on.The illuminating light switch 48 is made switchable in this way.
When the sterilization lamp 17 is turned on, it is difficult to tell whether it is on or off, and this, together with the interrotator switch 46, increases the safety level for one worker.

In addition, the power supply to the outlet 49 is controlled by the fan switch 51.
When the fan motor 50 moves, the blower 6
It is for the power plug 37 connected to the foot switch 36 that opens and closes the solenoid valve 34 in the gas piping unit 19, and is designed to prevent the main filter 8 from burning out due to the heat of the gas burner 11. There is.

The six modified blind plates shown in FIG. 22 are examples in which a blind plate B59 that can be raised is provided below the front 923.

The blind plate B59 is connected to the front window 23 by a hinge or the like.

When not working, it is used as a hoist in front of the ceiling case 1. Compared to the separate blind plate 42 described above, it is easy to handle and has good operability because it can be done without removing it.

In this embodiment, when the electric heater unit 54 is used in place of the gas burner 11 and power control is not required, an adjacent A plate-shaped or box-shaped spacing member (not shown) may be provided to maintain a predetermined distance from other devices and to prevent foreign objects from falling from above.

〔Effect of the invention〕

According to the present invention, it is possible to obtain a clean air supply device that is excellent in workability and space saving properties, and is also excellent in safety.

[Brief explanation of the drawing]

Fig. 1 is a left perspective view of a clean air supply device according to an embodiment of the present invention, Fig. 2 is a right perspective view of the same, Fig. 3 is a view from the back, Fig. 4 is a sectional view from the same side, and Fig. 5 is a perspective view from the back. Side sectional view of the window section, No. 6
Fig. 7 is a side sectional view showing a modified example of the configuration of the back portion in this embodiment, Fig. 8 is a side view showing an example of the usage state of the clean air supply device in this embodiment, and Fig. 9 ,
Fig. 10 is a partially sectional side view showing a modified example of the workbench, Fig. 11 is a perspective view showing the external appearance of the gas piping unit in this embodiment, and Fig. 12 is an installation procedure for the gas piping unit. Figures 13 and 13 are gas piping diagrams in the gas piping unit, Figures 14 and 15 are front views showing the gas burner in use and non-use states of the clean air supply device equipped with the gas piping unit, respectively, and Figure 16. 17 is a perspective view of a clean air supply device equipped with an electric heater unit, FIG. 17 is a perspective view of a clean air supply device having holes in the side plate, and FIG.
The figure is a front view of the clean air supply devices shown in Figure 17 lined up, Figure 19 is a diagram of how to install the blind plate, Figure 20 is a front view with the blind plate installed, and Figure 21 is the blind plate and germicidal lamp. Electric circuit diagram showing interlock with. FIG. 22 is a partially sectional side view showing a modification of the blind plate, and FIG. 23 is a side sectional view of a conventional clean air supply device. 1... Ceiling case, 2... Back case, 3... Workbench. 4... Outside air, 5... Pre-filter, 6... Blower, 7... Chamber, 8... Main filter, 9...
・Clean air, 10...Working room, 11...Gas burner, 12...Gas piping, 13...Lighting light, 14...
desk, 15...gas cock, 16...microscope, 17.
...sterilizing lamp, 18... worker. 19... Gas piping unit, 20... Side plate, 21.
...backboard, 22...front window, 23...benefit, 24...
・Operation switch, 26... Gas hose, 34... Solenoid valve, 35... Piping parts, 36... Foot switch,
37...Power plug, 38...Opening hole, 39...Flange, 40...Screw, 41...Protrusion, 42...
・Blind plate, 43...pin, 44...hanging hole, 45...
・Handle, 46...Interlock switch, 47...Bactericidal light switch, 48...Lighting light switch, 49...
Outlet, 50... Fan motor, 51... Fan switch, 52... Contactor, 53... 52 a contact, 54... Electric heater unit, 55... Connection space, 57... Movable workbench A, 58...Movable workbench B, 59...Blind plate B. 3rd eye $+vi 6th concavity 6 Fig. 8 Fig. 9 Fig. $lo Fig. H Fig. 14 Fig. 76 Fig. $17 Fig. 19 Fig. #20 Fig. dl z $ , 21 m, s3 Fig. 23

Claims (1)

[Claims] 1. A ceiling case that stores an air purifying element that supplies clean air to a work space and is disposed above the work space, and a ceiling case that houses an air purifying element that supplies clean air to the work space, and a ceiling case that is installed above the work space, and that is provided on both sides, the back, and the front of the work space. What is claimed is: 1. A clean air supply device comprising a side plate, a back plate, and a working opening, wherein the back plate is formed with a transparent portion. 2. A ceiling case that houses an air purification element that supplies clean air to the work space and is disposed above the work space, and side plates and a back that are formed on both sides, back, and front of the work space, respectively. In a clean air supply device comprising a plate and a working opening, a distance maintaining means is provided on at least one of the outer surface of the ceiling case and the outer surface of the side plate, and the distance maintaining means is provided adjacent to the outer surface of the side plate. A clean air supply device characterized in that it is configured to maintain a predetermined distance between the clean air supply device and other devices provided therein. 3. The clean air supply device according to claim 2, wherein the distance maintaining means is formed in a box shape and houses a control means for a heat source used in the working space.