JP2006010121A - Air shower apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air shower apparatus that prevents dust, or the like from being brought into a clean room while one who enters the clean room has adhered dust and hair to the bottom of shoes, and can reduce installation costs by dispensing with a construction, for example, for digging the floor of a building even if the air shower apparatus is installed in an existing building. <P>SOLUTION: A blowout port 7 and a suction port 8 for an air current F2 crawling on the floor surface of a passage floor 6 generated by the operation of a fan 9 for air jet are open opposingly on the side of body cases 2, 3 placed at both the sides of the passage floor 6. The dust and hair adhering to the clothes of one who enters the clean room are blown off by an air jet air current F1, and the dust and hair falling on the floor surface of the passage floor 6 are captured by the air current 2 and are collected rapidly in an air shower chamber 5, thus preventing the dust and hair from being adhering to the bottom of the shoes of one who enters the clean room and preventing them from being brought into the clean room. And the floor needs not be a grating floor, so that the passage floor of the existing building can be utilized as it is without any underfloor construction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  INDUSTRIAL APPLICABILITY The present invention is installed at the entrance / exit of a cleaning work room for manufacturing products such as foods, and is particularly suitable for installation at the entrance / exit of a cleaning work room where the passage floor is also shared with the building floor. The present invention relates to an air shower device.

  In particular, in the field of manufacturing, processing, and packaging of products such as beverages and foods, it is required to completely prevent foreign matter from entering the products. For this reason, a working room for manufacturing, processing, and packaging foods is usually made as a clean room. An air shower room is installed at the entrance and exit of such a cleaning work room. By blowing an air jet against the occupants in the air shower room, the dust attached to the work clothes is blown off by the air jet, so that the dust is cleaned. It is prevented from being brought into the work room.

  However, in the air shower chamber, since the air in the room is stopped at the same time as the air jet air flow is stopped, the dust and hair floating in the room at the time of the suction stop are falling on the floor surface. When a subsequent entrant enters the air shower room, there is a risk that the dust such as hair that has fallen on the floor will be stepped on with the shoe and brought into the clean room with the dust attached to the shoe sole. To prevent this, the manager regularly cleaned the floor.

  In order to prevent dust from remaining on the floor surface, conventionally, a countermeasure has been taken to provide a floor surface suction structure by providing a grating case or the like on the floor surface. The grid-like floor surface is used as a suction port to collect dust and hair that has fallen from the entrance / exit without leaving the floor surface. However, in order to make the grating structure, it is necessary to secure a space for placing the grating case under the floor below the doorway. Aside from installing a clean room, when installing in an existing building, a space for embedding the grating case is formed, so that a construction for digging the ground under the floor is necessary, resulting in an increase in installation cost.

  Injecting clean pressure air into the room from the ejection holes provided on the side wall surface of the air shower chamber, sucking room air from the suction holes between the floor surface and the side wall surface of the chamber, and each of the side wall surface and the floor surface It has been proposed that the ratio of the suction air volume from the suction holes can be adjusted to efficiently suck and remove floating dust and dust falling on the floor (Patent Document 1).

  Dust removal efficiency is achieved by arranging the air outlets in a ring surrounding the occupants so that clean air is blown out toward the occupants, and moving the air outlets up and down so that they hit the feet from the heads of the occupants. There has been proposed an air shower device that improves the above, prevents reattachment of dust, and prevents air mixed with dust from leaking into a clean room (Patent Document 2).

  An air suction port provided opposite to the lower portion of the air shower chamber, an air suction fan installed at the upper portion of the air shower chamber, and an injection nozzle that is disposed on the side of the air shower chamber and injects purified air into the room. A purified air supply mechanism in which the lateral width of the apparatus is made as narrow as possible has been proposed (Patent Document 3).

  An air shower device that sucks indoor air by a purified air supply mechanism arranged on the side of an air shower chamber and injects purified air, the purified air supply mechanism being substantially flush with the chamber floor at the bottom There has been proposed an air shower device that includes a hollow portion and prevents the dust in the air shower chamber from being accumulated on the floor surface by sucking the air in the air shower chamber through the hollow portion (Patent Document 4).

The floor of the air shower chamber is provided with an opening through which the removed pollutant passes, and an air nozzle is provided below the floor to provide an airflow that moves the pollutant that has passed through the opening to the side. There has been proposed an air shower apparatus that prevents accumulation and reduces floor cleaning work (Patent Document 5).
Japanese Patent Laid-Open No. 5-141732 (paragraphs [0008] to [0012], FIGS. 1 to 6) JP-A-11-344243 (paragraphs [0021] to [0030], FIGS. 1 to 4) JP 2002-147809 A (paragraphs [0011] to [0017], FIGS. 1 to 6) JP 2002-147810 A (paragraphs [0020] to [0022], FIGS. 1 to 4) JP 2003-279095 A (paragraphs [0023] to [0025], FIGS. 1 and 2)

  Therefore, even if it is a passage floor of an existing building rather than a grating floor structure, dust such as hair that has fallen from a person who enters and exits the cleaning work room is not left on the floor, but is collected using an air flow. There are issues to be solved.

  The object of the present invention is to quickly collect dust such as hair that has floated during air jet operation, and to automatically collect the dust that has fallen and adhere to the shoe sole of the occupant and bring it into the clean room. An object of the present invention is to provide an inexpensive air shower apparatus that can be installed in a state in which the passage floor of the building is used as it is.

  In order to solve the above problems, an air shower apparatus according to the present invention includes a shower case that includes a main body case on both sides and a ceiling case connected to the two main body cases and surrounds the air shower chamber in a gate shape on a passage floor, and The air flow outlet and the air inlet are provided at the lower portions of the side walls of the two main body cases so as to face each other.

  According to this air shower apparatus, the air shower chamber is formed on the normal passage floor, not on the grating floor, surrounded by a gate shape by the main body cases on both sides and the ceiling cases connected to the two main body cases. At the lower portions of the side walls of both main body cases, an air outlet and a suction port are provided so as to face each other. Therefore, the airflow blown out from the outlet opening at the lower part of one main body case to the air shower chamber flows so as to crawl on the passage floor and flows into the suction opening opened at the lower part of the side wall of the other main body case. At that time, dust and hair falling on the passage floor are sucked into the suction port while being collected by the airflow. As a result, the passage floor is cleaned by the air current, and dust and the like are not carried to the clean work room while adhering to the shoe sole of the occupant.

  In the air shower apparatus described above, a suction fan that sucks airflow from the suction port can be provided on one side wall case. In the case of such a configuration, the airflow sucked from the blowout port into the air shower chamber flows so as to crawl on the passage floor and is sucked into the suction port by the suction action of the suction fan.

  In the air shower apparatus provided with the above-described suction fan, a blower fan that blows out airflow from a blowout port can be provided on the other side wall case. In such a configuration, a reliable air flow that is sucked into the air inlet after being blown from the air outlet into the air shower chamber by the suction action of the air intake fan and the air blowing action of the air outlet fan, and flowing over the passage floor. Occurs.

  In this air shower apparatus provided with at least a suction fan, an air jet fan for blowing an air jet air flow into the air shower chamber from an air jet hole provided above the both side wall cases can be used as the suction fan. That is, by using the air jet fan as the suction fan, the air jet fan normally arranged in the air shower chamber can be used as it is as a suction fan that generates an air flow over the passage floor. The airflow sucked by the suction fan is sent through the shower case as it is, and blown out as an air jet airflow from the air jet holes provided above the side wall cases into the air shower chamber. Dust blown off by an operator who has been exposed to the air jet stream is dropped onto the floor surface and collected by the air stream flowing over the passage floor.

  In this air shower apparatus, doors that can be opened and closed are respectively installed at the entrances and exits of the air shower chamber, and the airflow that flows through the outlet and the inlet can be controlled in response to the opening and closing of the door. Doors that can be opened and closed are installed at the entrance and exit of the outside and the clean room, and when the worker enters and exits, the airflow that flows through the air outlet and suction port can be controlled to fall on the passage floor It is possible to collect dust, such as hair, with the airflow that flows over the passage floor, and to reduce the possibility of adhering to the shoe sole of the operator as much as possible.

  In the air shower apparatus that controls the airflow in response to opening and closing of the door, the suction fan can be continuously operated for at least a period from when the door provided at the entrance is opened until the door provided at the exit is closed. The suction fan is preferably in an operating state before, for example, the operation starts when the door opening switch is operated and the door provided at the entrance opens. Moreover, it is preferable that the suction fan is continuously operated for a while after the door provided at the outlet is closed. By controlling the airflow in accordance with the opening and closing timing of the door, a flow of air flowing on the passage floor before the occupant enters the air shower room is generated, and dust such as hair already falling on the passage floor is airflowed. In addition, it collects dust, such as hair, that may fall after the occupant leaves the room, with airflow that continues to flow on the aisle floor until the occupant leaves the room. Can do.

  As described above, the air shower apparatus according to the present invention can quickly collect dust in the air shower chamber and also automatically collects dust that has fallen on the floor surface. It is possible to prevent dust from adhering to the sole and bringing dust into the clean working room. Moreover, even when installed in an existing building, the passage floor can be used as it is, and construction work such as digging down the floor of the building is unnecessary, so that the installation cost can be reduced.

  Embodiments of an air shower apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view showing an embodiment of an air shower apparatus according to the present invention. The shower case 1 is composed of a main body case 2 and a main body case 3 on both sides, and a ceiling case 4 supported by both the main body cases 2 and 3 and connecting the upper sides thereof. The shower case 1 surrounds the air shower chamber 5 on the passage floor 6 in a gate shape. At the lowermost part of the main body case 3, a blowout port 7 is provided so as to open in the horizontal direction or at an appropriate blowing angle to the passage floor 6. In addition, a suction port 8 is provided in the lowermost part of the main body case 2 so as to open to the passage floor 6 in the horizontal direction so as to face the blowout port 7.

  An air jet fan 9 is disposed below the main body case 2, and the airflow blown by the air jet fan 9 is sent to the main filter 10 accommodated in the main body case 2, so After being purified by the filter 10, it is supplied to the main body case 2, the ceiling case 4 and the main body case 3 of the shower case 1 as indicated by arrows. In the main body case 2 and the main body case 3, a large number of air jet holes 11 are formed in the side wall facing the air shower chamber 5 in the range from the middle to the upper part. The air flow blown out by the air jet fan 9 is jetted into the air shower chamber 5 from the air jet hole 11.

  In this embodiment, the air jet fan 9 is used as a suction fan that generates a flow over the passage floor 6 in the air shower chamber 5. The airflow supplied from the airjet fan 9 is blown out as an airjet airflow F1 (attached only to a part) into the air shower chamber from a number of airjet holes 11 opened in the main body cases 2 and 3. Dust such as hair adhering to the work clothes of the occupants is blown off by the air jet airflow F1 and falls onto the surface of the passage floor 6. Part of the airflow sent into the shower case 1 becomes an airflow F2 that flows over the passage floor 6 from the air outlet 7, and the dust on the passage floor 6 is collected in the airflow F2 and faces the main body case. 2 is sucked in from a suction port 8 provided in 2. Since the pre-processing filter 12 is provided in the suction port 8, when the air flow F2 containing dust is sucked, it is collected by the pre-processing filter 12. The airflow F1 ejected from the air jet hole 11 is also sucked from the suction port 8 and returned to the fan case 1.

  FIG. 2 is a schematic sectional view showing another embodiment of the air shower apparatus according to the present invention. In this embodiment, components equivalent to those shown in FIG. 1 are given the same reference numerals as those used in FIG. In this embodiment, a blower fan 13 that blows out airflow from the blowout port 7 is provided at the bottom of the main body case 3. By providing the blowing fan 13, the blowing action of the blowing fan 13 is added together with the suction action by the air jet fan 9 as the suction fan, and the air flows over the passage floor 6 blown out from the blowing port 7 to the air shower chamber 5. Thus, a reliable air flow F3 sucked into the suction port 8 is generated. The air sucked from the suction port 8 passes through the main body case 2, the ceiling case 4, and the main body case 3 of the shower case 1 by the air jet fan 9, and a part is blown out to the air shower chamber 5 from the air jet hole 11, The remaining part is blown out from the blowout port 7 by the blowout fan 13 again. By always performing this circulation, dust that may include hair falling on the surface of the passage floor 6 is removed by the air flow F <b> 3 flowing so as to crawl on the passage floor 6.

  The blower fan 13 can be operated at regular intervals or at regular intervals regardless of the operation of the air jet fan 9 that forms an air jet airflow. As a result, an airflow F3 flowing so as to crawl the floor surface is formed, and even if dust floating in the room falls on the floor surface of the passage floor 6, the airflow F3 flowing so as to crawl the floor surface, Dust is removed and collected by the pretreatment filter 7 or the main filter 10.

  FIG. 3 is a schematic cross-sectional view of the air shower chamber. Components equivalent to those shown in FIG. 1 are denoted by the same reference numerals as those used in FIG. As shown in FIG. 3, automatic doors 22 and 23 are provided at an inlet 20 (external entrance) and an outlet 21 (exit leading to the cleaning work chamber) of the air shower chamber 5, respectively. The automatic doors 22 and 23 are provided with door switches 24 and 25 that are operated when an operator enters and exits, respectively, for opening the door. The operation of the door switches 24 and 25 can be related to the operation of the air jet fan 9 or the blowout fan 13 in the air shower chamber 5 as described below.

  FIG. 4 is a flowchart showing one operation mode of the air shower apparatus according to the present invention. In the operation flow shown in FIG. 4, in order for the occupant P to enter the air shower chamber 5 through the automatic door 22, the door switch 24 is pressed (step 1, abbreviated as “S 1”, the same shall apply hereinafter). Simultaneously with the opening of the door 22, the air jet fan 9 (including the blowout fan 13 in the case of the second embodiment, hereinafter the same) is operated (S2). By the operation of the air jet fan 9, an air flow F <b> 2 (air flow F <b> 3 in the case of the second embodiment; the same applies hereinafter) flowing so as to crawl the floor surface of the passage floor 6 is formed and falls on the passage floor 6. Dust and hair are removed (S3). Thereafter, the person P enters the air shower room 5 (S4), and the automatic door 23 is closed (S5). The air jet air flow F1 is ejected by opening the air jet hole 11 or the like (S6), and the air jet is stopped when an appropriate time has passed by a timer or the like (S7). When the user P finishes taking the air shower F1, the automatic door 23 is opened (S8). When the occupant P leaves the air shower chamber 5 (S9), the air jet fan 9 is stopped simultaneously with the opening of the automatic door 23 (S10), and the air jet fan 9 forming the airflows F1 and F2 is formed. Stop. This can save energy.

  FIG. 5 is a flowchart showing another operation mode when the air shower apparatus according to the present invention enters the room. The operation flow shown in FIG. 5 is a flow for cleaning in advance dust that may have fallen on the passage floor 6 by generating an air flow F2 (F3) before the occupant P enters the air shower chamber 5. is there. That is, in the operation flow shown in FIG. 5, when the opening switch 24 of the automatic door 22 provided at the inlet 20 of the air shower chamber 5 is pushed (S20), the air jet fan 9 (including the blowout fan 13) is simultaneously performed. Is operated (S21). The airflow F2 (F3) flowing so as to crawl the floor surface of the passage floor 6 in each of the above embodiments is formed, and the removal of dust falling on the passage floor 6 is started (S22). At this time, the automatic door 22 is controlled to open with a delay of several seconds after the door opening switch 24 is pressed. As a result, when the occupant P enters the air shower chamber 5, the removal of dust falling on the floor surface of the passage floor 6 is completed after the door opening switch 24 is pressed and the automatic door 22 is opened (S23). Then, after cleaning, the room person P enters the room. As a result, since the occupant P does not step on the dust or hair that has fallen on the passage floor 6 when entering the air shower room 5, the clean room is in a state where the dust or hair is attached to the occupant's shoe sole. It can prevent more reliably that it is carried in.

  FIG. 6 is a flowchart showing another operation mode when the air shower apparatus according to the present invention leaves the room. The operation flow shown in FIG. 6 is a flow for cleaning dust that may fall on the passage floor 6 by continuously operating the air flow F2 (F3) for a while when the occupant P leaves the air shower chamber 5. This is a flow suitable for the second embodiment provided with the blowing fan 13. That is, in the operation flow shown in FIG. 6, the occupant P takes air shower while the air jet is operating (S30), and then the air jet stop operation is performed at an appropriate time (S31). After the air jet fan motor 9 that forms the air jet airflow stops, the operation of only the blower fan 13 is continued (S32). The dust and hair scattered from the occupant P due to the air jet effect fall on the passage floor 6 over time (S33). By the operation of only the blower fan 13, an airflow flowing so as to crawl the floor surface of the passage floor 6 is continuously formed, and dust and hair are removed from the passage floor 6 (S 34). Thereafter, the automatic door 23 is opened (S35). After the entering person P leaves the open automatic door 23, the automatic door 23 closes and the blower fan 13 stops (S36). Although the delay from the stop of the air jet fan motor 9 (S32) to the opening of the automatic door 23 (S35) is several seconds, the dust and hair floating in the room after the air jet air flow is stopped are delayed. Even if it falls during the period, it can be recovered by the air flow provided by the blower fan 13.

  As described above, the air shower apparatus according to the present invention is provided with the air flow outlet 7 and the air inlet 8 facing the lower part of the main body case, and the air flow that crawls the floor surface of the passage floor 6 in the air shower chamber 5. Even if the building floor is used as it is, dust and hair that have fallen on the floor surface can be removed quickly, floating dust can be removed quickly, and dust falling on the floor surface can be reduced. be able to. In addition, when a person who enters the cleaning work room goes out of the room, it is not necessary to pay attention to dust and hair as in the case of entering the room, but the possibility of dropping dust when exiting through the air shower room 5 is not zero. According to the operation of the door switch 25, the same air flow control as that of the operation of the door switch 24 can be performed.

The schematic longitudinal cross-sectional view which shows one Example of the air shower apparatus by this invention. The schematic longitudinal cross-sectional view which shows another Example of the air shower apparatus by this invention. The schematic cross-sectional view of the air shower apparatus shown in FIG. 1 or FIG. The flowchart which shows an example of the air shower control in the air shower apparatus by this invention. The flowchart which shows another example of the air shower control in the case of the entrance in the air shower apparatus by this invention. The flowchart which shows another example of the air shower control in the case of leaving the room in the air shower apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shower case 2, 3 ... Main body case 4 ... Ceiling case 5 ... Air shower chamber 6 ... Passage floor 7 ... Outlet 8 ... Suction port 9 ... Fan for air jet 10 ... Main filter 11 ... Air jet hole 12 ... Pre-processing filter DESCRIPTION OF SYMBOLS 13 ... Fan for blowing 20 ... Inlet 21 ... Outlet 22 ... Automatic door on entrance side 23 ... Automatic door on exit side 24 ... Switch for automatic door opening on entrance side 25 ... Switch for automatic door opening on exit side

Claims (6)

  The main body case on both sides and a ceiling case connected to the two main body cases are provided, and a shower case surrounding the air shower chamber in a gate shape is provided on the passage floor, and an air outlet and a suction port are provided at the lower side walls of the two main body cases of the air shower chamber. Are provided in a manner in which they face each other.   The air shower apparatus according to claim 1, wherein a suction fan for sucking the airflow from the suction port is provided on one of the main body cases.   The air shower apparatus according to claim 2, wherein a blower fan that blows out the airflow from the blowout port is provided on the other side of the main body case.   4. The air shower apparatus according to claim 2, wherein the suction fan is an air jet fan for blowing an air jet air flow into an air shower chamber from an air jet hole provided above the two main body cases. 5.   2. The air shower according to claim 1, wherein doors that can be opened and closed are respectively installed at the entrances and exits of the air shower chamber, and the air flow that flows through the outlet and the suction port is controlled in response to the opening and closing of the door. apparatus.   6. The air shower apparatus according to claim 5, wherein the suction fan is operated for at least a period from when the door provided at the inlet is opened until the door provided at the outlet is closed.

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