JP2004084993A - Exhaust device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize substantially uniform exhaust from each drain port to prevent scattering of adhered bacteria and improve work environment in a room. <P>SOLUTION: A plurality of drain ports 8 provided on a floor surface 7 of a work room 1 are mutually communicated by a drain pipe 9, which is connected to an exhaust pipe 13 through a storage tank 10 having an air and water separation function. An upper end of the exhaust pipe 13 is connected to an exhaust duct 15. About 10% of air in the work room 1 is sucked and exhausted through the exhaust pipe 13, the storage tank 10, the drain pipe 9, and the drain ports 8. An opening adjusting mechanism 40 is provided in each drain port 8 to make an amount of air exhausted from each drain port substantially constant. Moreover, about 90% of air in the work room 1 is exhausted through an exhaust port 18 and the exhaust duct 15. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an exhaust device, and more particularly to an exhaust device suitable for exhausting air in a work room where food is processed in a food factory or a kitchen.
[0002]
[Prior art]
2. Description of the Related Art A large amount of water is used in a food factory, a kitchen, or other working room where food is prepared and processed, when cooking food and when cleaning floors, walls, and cooking utensils. This water is collected from a drain port provided on the floor surface and drained to a drain pipe, which is once collected in a storage tank to remove dust and sediment, and then drained to the outside as sewage. In food factories, etc., many drain outlets are installed on the floor to pay attention to hygiene.On the contrary, since waste water is accumulated near this drain outlet, garbage and various germs are easy to adhere and smell Easy to stick. Further, when a worker walks around the drain outlet or sprinkles water near the drain outlet, the bacteria may be further scattered or the suspended bacteria may increase.
[0003]
In order to cope with such a problem, Japanese Patent Application Laid-Open No. H11-293732 discloses that air flows from the ceiling of a food processing room toward the floor surface, and the air is sucked from a drain port and directed to a storage tank. Therefore, there has been proposed a device in which gas and wastewater are separated and exhausted from an exhaust fan. By adopting such a method, it is possible to prevent the bacteria adhering to the periphery of the drain port or the suspended bacteria from being scattered, thereby preventing the odor from being diffused.
[0004]
[Problems to be solved by the invention]
However, when the air is supplied from the ceiling to form an air flow in the room as described above, thereby exhausting bacteria and odors to the outside of the room, the drain pipe must be thicker than in the case of only drainage. That is, the drainage device using the conventional drainage pipe is configured to discharge the entire amount of the airflow from the ceiling from the underfloor drainage pipe, so that the thickness of the drainage pipe can be reduced to the maximum drainage amount per unit time. It is necessary to add the area to the cross-sectional area required for exhaust. In addition, for example, in a work room of a food factory, a large amount of heat or steam is generated, so a large amount of ventilation is required.In consideration of the air corresponding to the amount of ventilation, a larger drainage pipe is required. There must be. If such a thick drainage pipe is buried under the floor, the structure of the building becomes thicker, and in the case of a building or the like, a large loss is caused economically.
[0005]
In addition, the airflow flows from the ceiling toward the floor surface, and when exhausting it through the drainage port, the airflow at the drainage port installed closer to the exhaust fan is large, and the airflow becomes faster. In addition, the air flow is slow near the drain outlet installed at a position distant from the exhaust fan. If there is a difference in the air flow in the same room as described above, an air stagnation portion where air does not flow is formed, and bacteria are easily scattered, which is an unfavorable working environment for a person working in the room.
The present invention has been made in view of such circumstances, and makes the exhaust air from each drainage outlet substantially uniform to prevent scattering of attached bacteria and improve the indoor working environment.
[0006]
[Means for Solving the Problems]
To achieve the above object, the present invention is provided on a wall surface or a ceiling surface of a room provided with an air supply unit, and an exhaust port for discharging a part of room air supplied from the air supply unit to the outside, An exhaust flow path that communicates with a plurality of drain ports formed on the floor surface, and an exhaust fan that is provided in the exhaust flow path, sucks the remainder of the room air through the drain port, and discharges the air to the outside, An opening adjustment mechanism installed at each of the drain ports and capable of adjusting an amount of exhaust from each of the drain ports. In the above configuration, the amount of air exhausted from the exhaust port provided on the wall surface or the ceiling surface is preferably set to 70% or more of the air supplied to the room. Therefore, the amount of exhaust air from the exhaust passage is 30% of the room air. It is preferably set to less than 10%, and optimally adjusted to about 10%.
The exhaust passage may be an exhaust duct provided separately from a drain pipe communicating with each drain port. In addition, a water ring type drainage basin is provided at the drainage port, and an exhaust duct can be connected to the drainage basin.
[0007]
[Action]
In the present invention as described above, since the amount of exhaust from each drain is substantially uniform, it is possible to eliminate the stagnation portion of the air flow in the working room, and to prevent bacteria adhering near the drain. Scattering can be reliably prevented, and the indoor working environment can be improved. By providing an exhaust duct separately from the drain pipe, design and maintenance of the exhaust system and the drain system are facilitated. In addition, by providing a drainage basin at the drainage port, drainage and exhaust can be reliably separated, and bacteria and odors adhering to a drainage pipe or the like can be reliably prevented from diffusing into the room.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments of the exhaust device according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a schematic configuration showing a first embodiment of an exhaust device according to the present invention, and FIG. 2 is a cross-sectional view showing a drain portion and an exhaust portion of the exhaust device of FIG. In these drawings, an air supply duct 4 for conveying air from an air supply fan 3 is attached to the outside of a ceiling 2 of a work room 1 such as a factory where food is prepared and processed via a grill 5. The number of grills 5 to be installed is determined by the size of the work room 1 and the like. The air blown out from the grill 5 is sent into the work room 1 and forms a downward flow 6 toward the floor 7. The portion that supplies the descending flow 6 by the air supply fan 3, the air supply duct 4, and the grill 5 is hereinafter referred to as an air supply portion A.
[0009]
A plurality of drain holes 8 are provided on the floor surface 7, and water used when cooking food, washing floors, walls, cooking utensils, etc., collects in the drain holes 8, and is provided below the floor surface 7. Drain pipe 9 is drained. One end of the drain pipe 9 is connected to each of the drain ports 8, and the other end is connected to the storage tank 10. Therefore, the water used in the work room 1 is collected at a plurality of drain ports 8 like a water stream 11 indicated by a dotted arrow in FIG. 2 and poured into a storage tank 10 via a drain pipe 9. The water that has flowed into the storage tank 10 is discharged as sewage 12 to the outside via the trap 10a and the pipe 10b. Hereinafter, the route from the drain port 8 to the storage tank 10 is referred to as a drain section B here.
[0010]
An exhaust pipe 13 is connected to an upper part of the storage tank 10 and is connected to an exhaust duct 15 attached to a wall surface 14 of the work room 1. At the end of the exhaust duct 15, an exhaust fan 16 installed outside the room is installed. Therefore, when the exhaust fan 16 is operated, the air in the storage tank 10 is exhausted via the exhaust duct 15 and the exhaust pipe 13. Furthermore, since the drain pipe 9 communicating with the drain port 8 is attached to the storage tank 10 as described above, the operation of the exhaust fan 16 controls the operation of the working chamber 1 through the drain pipe 9 and the drain port 8. Aspirate air. The sucked air travels to the storage tank 10 through the same drain pipe 9 as the drained water 11. In FIG. 2, this is shown as a solid arrow 17. Since the U-shaped trap 10a is connected to the storage tank 10, the air in the work chamber 1 does not flow to the drain pipe 12b side.
[0011]
On the other hand, a plurality of exhaust ports 18 are provided in the vicinity of the floor surface of the wall surface 14 of the work chamber 1, and are connected to the exhaust duct 15. Therefore, the supplied downward flow 6 is also discharged from the exhaust port 18 to the outside. This is shown as arrow 6a in FIG. In the case of the embodiment, the relationship between the amount of air discharged from the exhaust port 18 and the amount of air discharged from the drain port 8 is expressed as “exhaust port 18> drain port 8”. About 90% is discharged from the exhaust port 18 and about 10% of the air is discharged from the drain port 8. Thereby, the thickness of the drain pipe 9 can be made substantially the same as the conventional one. The configuration from the drain port 8 and the exhaust port 18 to the exhaust fan 16 is referred to as an exhaust section C. The exhaust part C has a part in common with the drain part B, and the storage tank 10 functions as a steam separator.
[0012]
In the case of the embodiment, each drain port 8 is formed in a circular shape, and an opening adjusting mechanism 40 is provided at an upper end thereof. That is, as shown in FIG. 3A, the drain 8 is provided with a step 8a near the upper end, and the opening adjusting mechanism 40 is arranged in the step 8a. In the case of the embodiment, the aperture adjusting mechanism 40 is composed of a pair of lattice plates 42 and 44 formed in a disk shape as shown in FIG. It is arranged to be rotatable. Therefore, the size of the opening 46 formed by the two lattice plates 42 and 44 can be changed by relatively rotating the lattice plates 42 and 44.
[0013]
Although the exhaust port 18 is shown only on the left wall side in FIG. 1, it is similarly provided on the right wall side, and can be installed on the front wall if necessary. In addition to exhausting air from each drain port 8 from only one side as shown in FIG. 2, one air outlet is performed from the left side and the other two air outlets are performed from the right side in consideration of the arrangement and the number of exhaust units C. It can be divided and implemented.
[0014]
The exhaust device of the embodiment configured as described above measures the negative pressure at each drain 8, that is, the magnitude of suction of the air in the work chamber 1. Then, the opening adjustment mechanism 40 is adjusted so that the negative pressure at each drain port 8 becomes substantially uniform. That is, the aperture ratio of the opening adjustment mechanism 40 near the exhaust fan 16 is reduced, and the aperture ratio of the opening adjustment mechanism 40 far from the exhaust fan 16 is increased.
[0015]
Thereby, the suction amount of the air in the work chamber 1 at each drain port 8 can be made substantially uniform. Thereby, the work room 1 can eliminate the stagnation portion of the air and the like, and can prevent scattering of various bacteria and diffusion of the odor in the vicinity of each drain port 8. In the embodiment, the exhaust port 18 is provided in the wall surface 14 of the work chamber 1 and about 90% of the air exhausted from the exhaust port 18 is exhausted. The amount of air generated can be reduced, and the thickness of the drain pipe 9 can be reduced.
[0016]
FIG. 4 is an explanatory view showing the second embodiment, in which a drain section B and an exhaust section C are made independent. As in FIG. 2, the downflow 6 from the air supply section A is supplied into the work chamber 1. The floor 7 is provided with a plurality of drain ports 8a, each of which is connected to a storage tank 10 via a drain pipe 9 installed at the lower part of the floor. The storage tank 10 does not have the exhaust pipe 13 attached thereto, and therefore has an independent drainage section B, which does not require a steam-water separation function. Each drain 8a is provided with an opening adjusting mechanism 40 so that the amount of air in the work chamber 1 discharged from each drain 8a is substantially uniform.
[0017]
An exhaust port 18 is provided on the wall surface 14 of the working chamber 1, and air in the working chamber 1 is sucked as shown by an arrow 6 a and discharged from the exhaust duct 15 to the outside by the exhaust fan 16 as an exhaust flow 17. . The drain ports 8a communicate with each other via an exhaust pipe (exhaust duct) 19 connected to the side wall, and the end of the exhaust pipe 19 is connected to the exhaust pipe 13 and the exhaust duct 15. Accordingly, the air sucked from the drain port 8a is discharged from the exhaust pipe 19 to the outside of the room through the exhaust pipe C, the exhaust duct 15, and the exhaust fan 16 including the exhaust fan 16. At the same time, the air sucked from the exhaust port 18 is similarly discharged to the outside by the exhaust unit C.
[0018]
As described above, according to this embodiment, the drain portion B is in charge of only water treatment, and the exhaust portion C is in charge of only air treatment. By making the drainage section B and the exhaust section C independent in this way, the degree of freedom of installation of the exhaust system is increased, and the design of the exhaust system and the drainage system can be facilitated. 9 can be reduced in diameter. In the example of FIG. 2, both drainage and exhaust are performed by one drain pipe 9, so that the diameter must be larger than the diameter that can handle the maximum drainage per hour. However, by making the drain portion B and the exhaust portion C independent as in the example of FIG. 4, the thickness of the drain pipe 9 can be reduced.
[0019]
FIG. 5 shows the third embodiment, which is a further development of FIG. Also in this example, the drainage section B and the exhaust section C are independent, the downflow 6 is supplied into the work chamber 1, and the floor surface 7 is provided with a plurality of drainage ports 8 b. A water ring type drainage basin 20 described later is installed in the drainage port 8b, and is connected to the exhaust pipe 19. The drainage basin 20 is connected to a drainage pipe 9 provided below the floor surface 7 and is connected to a downstream storage tank 10. An exhaust port 18 is provided on the wall surface 14, and air in the work chamber 1 is sucked as indicated by an arrow 6 a and discharged from the exhaust duct 15 as an exhaust stream 17 via an exhaust fan 16. The exhaust pipe 19 is disposed inside the floor, and its end is connected to an exhaust duct 15 from an exhaust port 18 provided on the wall surface 14. Therefore, the exhaust part C formed by the operation of the exhaust fan 16 sends the air in the working chamber 1 to the outside through the exhaust duct 15, the exhaust port 18, the exhaust pipe 13, the drain port 8b, the drain basin 20, and the exhaust pipe 19. Discharge. An opening adjusting mechanism 40 (not shown) is disposed at each drain 8b, so that the amount of exhaust from each drain 8b is substantially uniform as described above.
[0020]
FIG. 6 shows a front section of the water ring type drainage basin 20 described in FIG. 5, and FIG. 7 is a perspective view thereof. The drain port 8b forms a drain basin 20. The drainage basin 20 has an opening adjustment mechanism 40 arranged at an upper end opening. Further, the drainage basin 20 has a bottom portion 21 connected to a pipe portion 22 communicating with the drainage pipe 9. The pipe 22 has an upper end formed as a protrusion 23 projecting into the drainage basin 20, and a lower end connected to the drainage pipe 9 of the drainage section B. And the trap 24 which covered the projection part 23 of the pipe part 22 inside the drainage basin 20 is arrange | positioned. The trap 24 is provided with a lower end opening 24 a, and the water level in the drainage basin 20 is maintained at the upper end of the protrusion 23. An exhaust pipe 19 is connected to a side wall of the exhaust basin 20, and communicates with another drain basin 20 via the exhaust pipe 19.
[0021]
When water flows in the work chamber 1 for cleaning the floor 7 and the like, the water flows into the drainage basin 20 through the opening adjusting mechanism 40 from the drainage port 8b configured as described above. The water that has flowed into the drainage basin 20 enters the trap 24 from the lower end opening 24 a of the trap 24, overflows the upper end of the protrusion 23, flows into the pipe 22, and forms the drainage pipe 9 forming the drainage part B. Flow down to On the other hand, when the exhaust part C operates, the air in the drainage basin 20 is sucked from the exhaust pipe 19, and the air in the work chamber 1 is sucked through the opening adjustment mechanism 40. In this case, inside the drainage basin 20, the stored water 25 created by the protrusion 23 and the trap 24 prevents the outside air from flowing backward from the pipe 22, and only the air in the work chamber 1 is discharged from the exhaust pipe 19. Is discharged.
[0022]
As described above, according to the embodiment of FIG. 5, the drainage basin 20 having the trap 24 is installed at the drainage outlet 8 b, and only the air in the work chamber 1 is discharged through the drainage basin 20 through the exhaust pipe 19. I made it. Therefore, the trap 24 installed in the drainage basin 20 prevents the outdoor air from flowing backward from the pipe portion 22 through the drainage portion B, and prevents the odor of the drainage pipe 19 from flowing into the exhaust system C. ing.
[0023]
FIG. 8 shows a fourth embodiment in which a part of FIG. 5 is improved, in which an exhaust fan 28 dedicated to the drainage basin 20 is provided separately from the exhaust fan 16. That is, the former exhaust fan 16 is dedicated to suction from the exhaust port 18, and the latter exhaust fan 28 is dedicated to suction from the exhaust pipe 19 connecting the drainage basins 20. As a result, bacteria adhering to the floor around the drainage basin 20 and bacteria adhering to the side wall of the drainage basin 20 are discharged to the outside without being scattered into the inside of the work room 1, so that the work room 1 is contaminated by the bacteria. Can be prevented.
[0024]
FIG. 9 shows a fifth embodiment, and the basic configuration is almost the same as that of FIG. However, the above-described air supply duct 4 is an exhaust duct 29, and the exhaust duct 15 is changed to an air supply duct 30. Air from the air supply fan 3 flows into the work chamber 1 from the air supply duct 30 through the outlet 31 of the grill provided on the wall surface 14. The air that has entered the working chamber 1 becomes the upflow 6 b and is discharged to the outside by the exhaust fan 16 through the exhaust duct 29 of the ceiling 2. In addition, a drain port 8 is provided on the floor surface 7, from which a part of room air and water for cleaning or the like flow in, and go to a storage tank 10 through a drain pipe 9. An exhaust pipe 13 is connected to the storage tank 10, and the upper end thereof is connected to the exhaust duct 29. Further, a trap is connected to the storage tank 10 so that the air flowing into the storage tank 10 does not flow to the drain pipe 10b before the storage tank 10. Therefore, the air from the air supply fan 3 and the air supply duct 30 serving as the air supply section A enters the work chamber 1 and becomes the upward flow 6b, and is discharged by the exhaust duct 29 and the exhaust fan 16 of the exhaust section C. Further, the air sucked from the drain port 8 is also discharged to the exhaust section C through the drain pipe 9 serving as the drain section B and the storage tank 10.
[0025]
With such a configuration, the water used indoors is drained at the drain B in the same manner as in FIG. A part (about 90%) of the air supplied from the outlet 31 to the work chamber 1 flows into the exhaust duct 29 as the upflow 6b, and another part (about 10%) flows into the drain port 8. , And is discharged through a drain pipe 9. For this reason, much heat and steam generated during the cooking process in the work room 1 are discharged as the upward flow 6b. The germs floating around the drain 8 are discharged together with the air sucked into the drain 8. Therefore, it is possible to prevent bacteria and odors adhering in the drain port 8 from scattering and diffusing into the room. Although not shown in the drawing, an opening adjusting mechanism for adjusting the opening area is installed at the indoor exhaust opening of the exhaust duct 29 so that the exhaust from each opening is substantially uniform.
[0026]
【The invention's effect】
As described above, according to the present invention, the amount of exhaust air from each drain port can be adjusted so as to be substantially uniform, so that it is possible to eliminate the stagnation portion of the airflow in the working room, and to adhere to the vicinity of the drain port. It is possible to surely prevent the germs from scattering and improve the indoor working environment. By providing an exhaust duct separately from the drain pipe, design and maintenance of the exhaust system and the drain system are facilitated. In addition, by providing a drainage basin at the drainage port, drainage and exhaust can be reliably separated, and bacteria and odors adhering to a drainage pipe or the like can be reliably prevented from diffusing into the room.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a configuration of an exhaust device according to a first embodiment of the present invention.
FIG. 2 is an explanatory sectional view showing a part of FIG. 1;
FIG. 3 is a detailed explanatory diagram of an opening adjusting mechanism according to the embodiment;
FIG. 4 is a cross-sectional view illustrating a main part of a second embodiment.
FIG. 5 is a sectional view showing a main part of a third embodiment.
FIG. 6 is a front sectional view of a drainage basin according to the embodiment.
FIG. 7 is a schematic perspective view of a drainage basin according to the embodiment.
FIG. 8 is an explanatory view showing a fourth embodiment in which a part of FIG. 5 is improved.
FIG. 9 is a schematic perspective view showing the configuration of a fifth embodiment.
[Explanation of symbols]
1 working room, 2 ceiling, 3 air supply fan, 4 air supply duct, 5 grill, 6 downflow, 7 floor, 8 …… Drain port, 9 …… Drain pipe, 10 …… Reservoir, 11 …… Drain, 12 …… Sewage, 13 …… Exhaust pipe, 14 …… Wall wall, 15… Exhaust Duct, 16 Exhaust fan, 17 Exhaust flow, 18 Exhaust port, 19 Exhaust duct (exhaust pipe), 20 Drainage basin, 21 Bottom part, 22 … Tube part, 23… Projecting part, 24… Trap, 25… Reserved water, 28… Exhaust fan, 29… Exhaust duct, 30… Supply air duct, 31… Outlet 40, opening adjustment mechanism, 42, 44 lattice plate, 46 opening.

Claims (3)

An exhaust port that is provided on a wall surface or a ceiling surface of a room provided with an air supply unit and that discharges part of room air supplied from the air supply unit to the outside,
An exhaust flow path interconnecting a plurality of drain ports formed on the floor surface,
An exhaust fan that is provided in the exhaust passage, sucks the remainder of the room air through the drain port, and discharges the exhaust to the outside;
An opening adjustment mechanism that is installed at each of the outlets and that can adjust the amount of exhaust from each of the outlets,
An exhaust device comprising: The exhaust device according to claim 1,
The exhaust device, wherein the exhaust passage is an exhaust duct provided separately from a drain pipe communicating with each of the drain ports. The exhaust device according to claim 2,
An exhaust device, wherein the drain port has a sealed-type drain basin, and the exhaust duct is connected to the drain basin.

Images