JP3844713B2 - Worktable with contaminated gas purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a work table such as an experimental table or a dissecting table that performs dissection of an autopsy specimen immersed in formalin, for example, and more specifically, decomposes and purifies contaminated gases such as formalin generated from the autopsy specimen. The present invention relates to a workbench equipped with a contaminated gas purification device.
[0002]
[Prior art]
As a prior example according to the present invention, for example, there is JP-A-2001-178802. In this preceding example, a case having a work plate made of a perforated plate at the top is provided with a fan for sucking air from a large number of holes in the work plate and decomposing pollutant gases such as formalin in the sucked air. In this configuration, an ultraviolet light source is provided in a plurality of cylindrical filters holding activated carbon as a photocatalyst and an adsorbent.
[0003]
[Problems to be solved by the invention]
In the configuration of the preceding example as described above, when performing work such as dissection on the work plate, the pollutant gas emanating from the autopsy specimen can be sucked from the many holes of the work plate, When the contaminated gas rises directly from the autopsy sample due to flow or the like, there is a problem that it is difficult to suck the contaminated gas.
[0004]
By the way, as a conventional configuration, laminar air is ejected downward from an ejection device provided on the ceiling, and a work table is placed in the air flow to dispose pollutant gas generated from an autopsy specimen downward. A configuration has also been developed in which air is sucked from a suction port provided in a workbench (see, for example, JP-A-10-272138). However, in this case, there is a problem that not only the equipment becomes large, but also the position of the work table is limited.
[0005]
In the preceding example, since the light source is provided in the cylindrical filter holding the photocatalyst and the adsorbent, the photocatalyst activated by irradiating light is exposed on the inner peripheral surface of the filter. This is the only part that has a problem, and there is a problem in improving the efficiency of decomposing pollutant gases, and when the adsorption capacity of the adsorbent decreases, the filter must be replaced including the photocatalyst. There is a problem.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 includes a table in which an autopsy sample can be placed and a table having a large number of suction ports provided in an upper portion. , A photocatalyst housing portion containing a photocatalyst for decomposing pollutant gas in the air sucked from the suction port, and an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst housing portion And an air jetting part for jetting air that has passed through the adsorbent containing part downward from above the table, and the photocatalyst containing the air sucked through the suction port. It is the structure provided with the ventilation apparatus which circulates to a part, an adsorption agent accommodating part, and an air ejection part.
[0007]
According to a second aspect of the present invention, there is provided a photocatalyst for decomposing pollutant gas in the air sucked from the suction port in a gantry provided with a table having a large number of suction ports on which an autopsy sample can be placed. A photocatalyst storage part and an adsorbent storage part for storing an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst storage part, and the air sucked through the suction port is In the workbench provided with a blower for passing through the photocatalyst storage unit and the adsorbent storage unit and ejecting to the outside, the photocatalyst storage unit includes a light transmissive inner cylinder having a light source therein and the inner cylinder. The photocatalyst holding body is disposed between the outer cylinder and the inner cylinder, and the inner surface of the outer cylinder is formed as a reflecting surface that reflects inward the light transmitted between the photocatalyst holding bodies.
[0008]
According to a third aspect of the present invention, in the workbench according to the second aspect, the adsorbent storage portion passes through the lower storage portion into which air flows after passing through the photocatalyst storage portion, and the lower storage portion. It is divided into an upper storage part into which the subsequent air flows, an adsorbent supply part for the adsorbent storage part is provided at the upper part, and an adsorbent discharge part is provided at the lower part. A disposal means for discarding a fixed amount of adsorbent is provided.
[0009]
According to a fourth aspect of the present invention, there is provided a photocatalyst for decomposing a pollutant gas in the air sucked from the suction port in a gantry provided with a table having a large number of suction ports on which an autopsy sample can be placed. And a photocatalyst storage unit that stores the adsorbent for adsorbing an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst storage unit, and the air sucked through the suction port In the workbench provided with a blower for passing through the photocatalyst storage unit and the adsorbent storage unit and ejecting to the outside, the adsorbent storage unit is a lower storage into which air after passing through the photocatalyst storage unit flows. And an upper storage part into which air flows after passing through the lower storage part, and an adsorbent supply part for the adsorbent storage part is provided in the upper part and an adsorbent discharge part is provided in the lower part. The discharge section is Hai棄 means for Hai棄 the adsorbent in which is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 to 3, the work table 1 according to the present embodiment includes a gantry 5 that includes a plurality of wheels 3 that are freely rotatable. A table 10 is provided which is detachably mountable as a part of the table, and a mounting plate 9 having a large number of suction ports 7 is provided. Between the mounting plate 9 and the bottom of the table frame 10A, a flow path 11 for the liquid flowing down from the suction port 7 and the air sucked from the suction port 7 is formed to be inclined. At the lowest position of the path 11, a liquid discharge port 15 is provided for discharging the liquid to the waste water receiver 13 supported by the mount 5.
[0011]
A suction duct 19 communicating with the suction port side of the blower 17 such as a blower is inclined below the table 10, and the table frame 10 </ b> A is provided at a plurality of locations of the suction duct 19. A suction port 21 penetrating through the bottom of the channel 11 and protruding into the channel 11 at an appropriate height is provided. At the lowest position of the suction duct 19, a discharge port 23 for discharging the liquid flowing into the suction duct 19 to the waste water receiver 13 is provided. The connecting portion between the suction duct 19 and the blower 17 is formed so as to protrude one step higher so that liquid is not sucked.
[0012]
With the above configuration, when the air blower 17 is driven and the air in the suction duct 19 is sucked, the inside of the flow path 11 communicated via the suction port 21 becomes negative pressure, and a large number of suction ports 7 provided on the mounting plate 9. The outside air and the liquid on the mounting plate 9 are sucked into the flow path 11. Then, the liquid flows down toward the liquid discharge port 15 due to the inclination of the flow path 11 and is discharged from the discharge port 15 to the container 13. Then, the slight liquid that has entered the suction duct 19 is discharged from the discharge port 23 to the container 13, and only air is sucked into the blower device 17.
[0013]
In order to purify pollutant gases such as formalin gas in the air sucked from the upper surface of the table 10 by the blower device 17, a photocatalyst storage portion in which the photocatalyst for decomposing the contaminated gas is stored in the mount 5. 25 and an adsorbent storage unit 27 for storing an adsorbent for adsorbing the remaining pollutant gas in the air after passing through the photocatalyst storage unit 25.
[0014]
More specifically, the outlet of the blower device 17 communicates with the upper part of a cylindrical casing 29 in the vertical direction in which the photocatalyst housing 25 is housed. And the lower part of this casing 29 is connected to the lower part side of the adsorbent duct 31 which accommodated the said adsorbent accommodating part 27, and the exit of this adsorbent duct 31 is the exhaust_gas | exhaustion arrange | positioned at the one side of the said mount frame 5 It communicates with the duct 33.
[0015]
The exhaust duct 33 is connected to a lower portion of a pipe-shaped arm column 35 that is generally U-shaped and long in the vertical direction via a rotary joint 37 so as to be horizontally rotatable. The air blowing arm 39 that can be positioned above the table 10 is supported horizontally and rotatably via a rotary joint 41. The feeding arm 39 forms an air ejection part that ejects air downward from above the table 10. A rectifying portion 43 having a honeycomb structure is provided in the blower arm 39, and is configured to eject air downward. In other words, the feeding arm 39 is provided on the gantry 5 via the arm column 35.
[0016]
Accordingly, the pollutant gas in the air is decomposed by passing through the photocatalyst storage part 25, and the residual pollutant gas in the air is adsorbed by the adsorbent by passing through the adsorbent storage part 27 to be purified. The discharged air is ejected downward from the air blowing arm 39, so that it is possible to prevent the contamination gas from directly rising from the subject on the table 10, and from the large number of suction ports 7 flowing down. By aspirating, it is possible to effectively prevent the polluted gas generated from the subject to be scattered from spreading to the surroundings.
[0017]
By the way, the arm column 35 and the air blowing arm 39 can be rotated horizontally, thereby avoiding the rotation of the arm column 35 and the air blowing arm 39 to an unobstructed position when the subject 10 is carried in and out of the table 10. The arm strut 35 and the blower arm 39 do not get in the way.
[0018]
As shown in FIG. 4, the photocatalyst storage 25 includes a light source 45 such as a photochemical fluorescent lamp (ultraviolet lamp) and a light-transmitting inner tube 47 whose upper portion is closed. A photocatalyst is accommodated in an annular space 51 formed between the outer cylinder 49 surrounding the inner cylinder 47 and having an inner peripheral surface as a reflection surface and the inner cylinder 47.
[0019]
The photocatalyst is made of titanium dioxide (TiO ₂ ) powder, and is fixed to the surface of an appropriately shaped photocatalyst holder 53 via an appropriate binder. The photocatalyst holding body 53 uses gaps between the photocatalyst holding bodies 53 so that the light from the light source 45 is transmitted between the photocatalyst holding bodies 53 so as to use the reflected light reflected by the inner surface of the outer cylinder 49. 55 is formed.
[0020]
In the present embodiment, the photocatalyst holding member 53 is formed into a substantially spherical body such as a polyhedron, a rugby ball shape, an egg shape, or a sphere by glass or ceramic. Therefore, when the photocatalyst holder 53 is housed in the space 51 between the inner cylinder 47 and the outer cylinder 49, a gap 55 through which light from the light source 45 can be transmitted in the radial direction is formed between the photocatalyst holders 53. It is what is done.
[0021]
By the way, the photocatalyst holder 53 may be any structure as long as the light of the light source 45 can be transmitted when the photocatalyst holder 53 is accommodated in the space 51 between the inner cylinder 47 and the outer cylinder 49. Therefore, for example, it is also possible to make a shape such as a spherical shape of a filter board provided with a hole through which light can pass, and a shape such as a meteorite shape provided with an appropriate number of grooves capable of transmitting light on the outer peripheral surface, This shape also belongs to a sphere.
[0022]
As described above, by using the inner surface of the outer cylinder 49 as a reflecting surface, the photocatalyst holding member 53 is activated by the photocatalyst holder 53 directly irradiated from the light source 45 and the portion irradiated with the reflected light from the inner surface of the outer cylinder 49. The active surface becomes wider.
[0023]
When air passes through the space 51 between the inner cylinder 47 and the outer cylinder 49 in the photocatalyst storage unit 25 from the upper side to the lower side, formalin in the air is finally decomposed into carbon dioxide and water by the action of the photocatalyst. It is what is done.
[0024]
Then, the air after passing through the photocatalyst storage unit 25 flows into the adsorbent storage unit 27, and the residual pollutant gas in the air is adsorbed and removed by the adsorbent provided in the adsorbent storage unit 27. As described above, the purified air is jetted onto the upper surface of the table 10 through the exhaust duct 33, the arm column 35, and the blower arm 39. That is, air is circulated.
[0025]
The adsorbent storage unit 27 is appropriately thickened by providing an air permeable member 57 (see FIG. 3) such as a pair of punching boats or a net member, which is appropriately separated in the front-rear direction (left-right direction in FIG. 3). The front and rear adsorbent descending passages 59 are formed in the front and rear, and the front and rear adsorbent descending passages 59 are adsorbed by a hopper or the like as an adsorbent supply unit provided in the upper part of the adsorbent duct 31. The medicine reservoir 61 is in communication. The adsorbent reservoir 61 is configured to be openable and closable at the bottom, and is provided so that it can be taken out to the outside. Therefore, the adsorbent 63 can be easily replenished to the adsorbent reservoir 61.
[0026]
Therefore, the adsorbent 63 in the adsorbent reservoir 61 tends to always flow down into the adsorbent descending passage 59 when the adsorbent reservoir 61 is set in the adsorbent duct 31. The inside is always filled with the adsorbent 63. An air ascending passage 65 passing through the adsorbent descending passage 59 is formed between the front and rear adsorbent descending passages 59.
[0027]
The space outside the front and rear adsorbent descending passages 59 is an upper space communicating with the exhaust duct 33 and a lower space 69L communicating with the lower side of the photocatalyst housing 25 by a partition plate 67 provided in the adsorbent duct 31. It is partitioned into a space 69U. In other words, by providing the partition plate 67, the adsorbent storage part 27 passes through the lower storage part 27L through which the air flows after passing through the photocatalyst storage part 25 and the lower storage part 27L. The rising passage 65 is partitioned into an upper storage portion 27U into which the raised air flows. The partition plate 67 is disposed in the ascending passage 65 between the front and rear adsorbent descending passages 59, and the air that has passed through the photocatalyst housing portion 25 is introduced to the lower side of the ascending passage 65. It is also possible to reverse the relationship between the inner and outer passages.
[0028]
A lower portion of the adsorbent descending passage 59 is provided with a discharge portion for discharging the adsorbent 63 whose adsorption capacity is deteriorated (decreased), and a discharge means 71 for discharging the adsorbent 63 is provided in the discharge portion. Is provided. In the present embodiment, as the discarding means 71, a bowl-shaped on-off valve 73 having an open top is rotatably provided below the adsorbent descending passage 59. The on-off valve 73 is, for example, a motor or the like. For example, the rotary actuator 75 (see FIG. 1) is linked and linked through a linkage mechanism such as a chain.
[0029]
Accordingly, when the rotary actuator 75 is driven to rotate the on-off valve 73, the opening of the on-off valve 73 is repeatedly inverted, so that the opening is lowered into the on-off valve 73 when the opening is positioned on the upper side. The adsorbent is discarded downward when the opening is positioned on the lower side by the rotation of the on-off valve 73. Therefore, a predetermined amount of adsorbent can be discarded by rotating the rotation actuator 75 a predetermined number of times or for a predetermined time.
[0030]
As described above, when the deteriorated adsorbent is discarded from the lower part of the adsorbent descending passage 51, new adsorbent flows down from the adsorbent storing portion 61 into the adsorbent descending passage 59 and is supplied by its own weight. The agent descending passage 59 is always filled with the adsorbent.
[0031]
A box-shaped storage container 77 for storing the discarded adsorbent 63 is disposed at a position below the adsorbent lowering passage 59, and the storage container 77 is provided in a freely accessible manner.
[0032]
In the present embodiment, the adsorbent 63 is made of spherical cellulose particles having a porous structure, contains an adsorbent for formalin gas for adsorbing formalin as a pollutant gas, and has an adsorption rate of formalin. It is a commercially available product that contains a volatile functional agent whose color changes with change, and is generally known. Therefore, although the detailed description of the adsorbent 63 is omitted, the adsorbent 63 changes in color depending on the adsorption rate of the pollutant gas. (Deterioration) can be detected.
[0033]
Therefore, at a suitable position corresponding to the lower storage portion 27L, a change in the color of the adsorbent 63 in the lower storage portion 27L is detected, and the adsorption rate of the adsorbent 63 is high, that is, the adsorption capacity is reduced or deteriorated. Sensors 79 for detecting this are provided at appropriate positions. The sensor 79 is configured to rotate the rotation actuator 75 a predetermined number of times or for a predetermined time under the control of a control device (not shown) when the adsorption capacity of the adsorbent 63 is reduced, that is, when deterioration is detected. It is.
[0034]
Therefore, when the sensor 79 detects the deterioration of the adsorbent 63, the rotation actuator 75 is automatically rotated, and the deteriorated adsorbent 63 is automatically discarded.
[0035]
It should be noted that when the sensor 79 detects the deterioration of the adsorbent 63, it is possible to use a notification means such as a lamp or a buzzer instead of the structure in which the rotation actuator 75 is automatically driven. . In this case, the rotation actuator 75 may be artificially driven.
[0036]
The adsorbent reservoir 61 is provided with a sensor for detecting that the adsorbent 63 in the adsorbent reservoir 61 has decreased. When the adsorbent 63 decreases, a decrease in the adsorbent 63 is notified by a lamp or the like. Is done. A viewing window is provided through which the amount of adsorbent 63 in the adsorbent reservoir 61 can be visually observed.
[0037]
By the way, in the workbench 1, when the air blower 17 is driven, the air above the table 10 is sucked from a large number of suction ports 7, and as indicated by an arrow A in FIG. Passes through the space 51 in the downward direction. When air passes through the photocatalyst housing 25, formalin in the air is finally decomposed into carbon dioxide and water by the action of the photocatalyst.
[0038]
Then, the air that has passed through the photocatalyst storage unit 25 and reached the lower space 69L of the adsorbent storage unit 27 passes through the lower storage unit 27L of the adsorbent storage unit 27 as indicated by an arrow B in FIG. As shown by an arrow C, the air flows out into the ascending passage 65, passes through the upper storage portion 27U as shown by an arrow C, and flows out into the upper space 69U. To the upper surface of the table 10.
[0039]
As described above, the remaining pollutant gas in the air is adsorbed by the adsorbent 63 when the air that has passed through the photocatalyst storage section 25 next passes through the adsorbent storage section 27. At this time, since it passes through the upper storage portion 27U after passing through the lower storage portion 27L of the adsorbent storage portion 27, the adsorbent 63 in the lower storage portion 27L always adsorbs the pollutant gas first. The deterioration of the adsorbent 63 in the lower storage portion 27L is more severe than that of the adsorbent 63 in the upper storage portion 27U.
[0040]
Then, the deteriorated adsorbent 63 is automatically discharged from the lower portion, and the new adsorbent 63 is supplied from the upper portion to the adsorbent storage portion 27, so that efficient adsorption can always be performed.
[0041]
【The invention's effect】
As will be understood from the above description, according to the present invention, it is possible to purify the contaminated gas by preventing the contaminated gas from escaping from the autopsy specimen on the workbench to the surroundings. The conventional problem can be solved.
[Brief description of the drawings]
FIG. 1 is an explanatory front sectional view schematically showing a workbench according to the present embodiment.
FIG. 2 is an explanatory plan view schematically showing a workbench according to the present embodiment.
FIG. 3 is an explanatory side sectional view showing a main part of a workbench according to the present embodiment.
FIG. 4 is an explanatory plan view of a photocatalyst housing part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Working table 5 Base 7 Suction port 9 Placement plate 10 Table 17 Blower 25 Photocatalyst storage part 27 Adsorbent storage part 27U Upper storage part 27L Lower storage part 29 Casing 31 Adsorbent duct 33 Exhaust duct 35 Arm column 39 Blower arm 45 Light source 47 Inner cylinder 49 Outer cylinder 51 Space 53 Photocatalyst holder 55 Gap 59 Adsorbent lowering passage 61 Adsorbent reservoir 63 Adsorbent 65 Ascending passage 67 Partition plate 69U Upper space 69L Lower space 71 Discharge means 73 On-off valve

Claims (4)

A photocatalyst storage unit that stores a photocatalyst for decomposing pollutant gas in the air sucked from the suction port in a gantry provided with a table having a large number of suction ports on which an autopsy sample can be placed. An adsorbent storage section that stores an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst storage section is provided, and the air that has passed through the adsorbent storage section is moved downward from above the table. Contaminating gas purification comprising: a blower that circulates air sucked through the suction port to the photocatalyst housing, the adsorbent housing, and the air ejecting portion provided in the gantry with a jetting air jetting portion A workbench equipped with equipment. A photocatalyst storage unit that stores a photocatalyst for decomposing pollutant gas in the air sucked from the suction port in a gantry having a table having a large number of suction ports on which an autopsy sample can be placed. An adsorbent storage section that stores an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst storage section, and that sucks air that has been sucked through the suction port into the photocatalyst storage section and the adsorbent storage section. In the workbench provided with a blower for passing through the outside and ejecting to the outside, the photocatalyst housing portion is disposed between a light-transmitting inner cylinder having a light source and an outer cylinder surrounding the inner cylinder. A pollutant gas purifier is provided, wherein a photocatalyst holder is disposed, and an inner surface of the outer cylinder is formed on a reflecting surface that reflects light transmitted between the photocatalyst holders inward. Workbench. 3. The workbench according to claim 2, wherein the adsorbent storage portion includes a lower storage portion into which air flows after passing through the photocatalyst storage portion, and an upper storage into which air flows after passing through the lower storage portion. The adsorbent supply part for the adsorbent storage part is provided at the upper part and the adsorbent discharge part is provided at the lower part, and a predetermined amount of adsorbent is discarded in the discharge part. A workbench equipped with a pollutant gas purification device, characterized in that a waste disposal means is provided. A photocatalyst storage unit that stores a photocatalyst for decomposing pollutant gas in the air sucked from the suction port in a gantry having a table having a large number of suction ports on which an autopsy sample can be placed. An adsorbent storage section that stores an adsorbent for adsorbing residual pollutant gas in the air after passing through the photocatalyst storage section, and that sucks air sucked through the suction port into the photocatalyst storage section and the adsorbent storage In the workbench provided with a blower for passing through the part and ejecting to the outside, the adsorbent storage part includes a lower storage part into which air flows after passing through the photocatalyst storage part, and the lower storage part. The upper storage part into which the air after passing flows is partitioned, the adsorbent supply part for the adsorbent storage part is provided in the upper part, and the adsorbent discharge part is provided in the lower part. To discard a certain amount of adsorbent Workbench with contaminated gas purifying device, wherein a the Hai棄 means is provided.

Images