JP5739604B2

JP5739604B2 - Negative pressure monitoring dust collecting device and negative pressure monitoring dust collecting method

Info

Publication number: JP5739604B2
Application number: JP2009017120A
Authority: JP
Inventors: 中村　弘; 弘中村; 清豪広瀬
Original assignee: Obayashi Corp
Current assignee: Obayashi Corp
Priority date: 2008-12-26
Filing date: 2009-01-28
Publication date: 2015-06-24
Anticipated expiration: 2029-01-28
Also published as: JP2010167397A

Description

本発明は、建築物その他の施設を含む構造物において、その構造物の建設、解体、改修工事などで、かかる構造物に付着するダイオキシン類、アスベスト、放射性物質、塗料材、塵埃などの付着物を除去する際の負圧施工区画内の負圧状態を制御するための負圧監視集塵装置及び負圧監視集塵方法に関する。 The present invention relates to structures including buildings and other facilities, such as dioxins, asbestos, radioactive materials, paint materials, and dust that adhere to such structures during construction, dismantling, and renovation of the structures. The present invention relates to a negative pressure monitoring dust collecting apparatus and a negative pressure monitoring dust collecting method for controlling a negative pressure state in a negative pressure construction section when removing water.

建築物その他の施設を含む構造物の解体、構造物の内装材除去などを行う際に、発生する付着物の粉塵が施工区域外に飛散することを防止するため、その施工区画をプラスチック製の養生シートによって覆って養生し、この施工区画内部を負圧に維持して施工区画外への粉塵の飛散を防止するようにした負圧施工区画が知られている。（例えば特許文献１）。 When dismantling structures including buildings and other facilities and removing interior materials from structures, the construction area is made of plastic in order to prevent dust from the generated deposits from scattering outside the construction area. There is known a negative pressure construction section which is covered with a curing sheet and cured, and the inside of the construction section is maintained at a negative pressure to prevent dust from being scattered outside the construction section. (For example, patent document 1).

特開平９−２７９８６１号公報Japanese Patent Laid-Open No. 9-279861

このような特許文献１における負圧施工区画での除去作業においては、養生シートが破れたり負圧集塵機が故障したりした場合に、迅速な対応が困難であって負圧施工区画内の負圧が維持できず、ダイオキシン類、アスベスト、放射性物質、塗料材、塵埃等の付着物としての有害物質が外部に漏れてしまうというおそれがある。 In such removal work in the negative pressure construction section in Patent Document 1, when the curing sheet is torn or the negative pressure dust collector breaks down, it is difficult to respond quickly and the negative pressure in the negative pressure construction section May not be maintained, and harmful substances such as dioxins, asbestos, radioactive substances, paint materials, and dusts may leak to the outside.

本発明の課題は、有害物質の外部への漏れを防止するようにした負圧監視集塵装置及び負圧監視集塵方法を提供することにある。 An object of the present invention is to provide a negative pressure monitoring dust collecting apparatus and a negative pressure monitoring dust collecting method which prevent leakage of harmful substances to the outside.

Means for Solving the Problems and Effects of the Invention

上記課題を解決するための本発明の負圧監視集塵装置は、負圧化される負圧施工区画に接続され、この負圧施工区画内の空気を吸引し、この空気中に含まれる粉塵を除去して外部に排気する換気集塵によって、前記負圧施工区画内を負圧にする換気集塵手段と、前記負圧施工区画の内部の気圧を検出する気圧検出手段と、前記換気集塵手段の作動を制御する制御装置と、を備え、
前記気圧検出手段は、前記負圧施工区画の内部の気圧と外部の気圧との差圧を検出する区画隔壁部に配置された差圧センサと、前記負圧施工区画内において負圧を直接的に検出する負圧センサと、によって構成され、
前記換気集塵手段は、第１の換気集塵装置と、第２の換気集塵装置と、を有し、
前記第１の換気集塵装置は前記負圧施工区画内を負圧に維持するために使用され、前記第２の換気集塵装置は前記負圧施工区画内の負圧が負圧設定値から外れた際のバックアップ用として常に稼動できるように待機させられており、
前記第２の換気集塵装置は、前記第１の換気集塵装置の故障による風量低下、前室からの外部空気の流入や養生シートの破れによって、前記第１の換気集塵装置によって維持されていた前記負圧施工区画内の負圧が、当該負圧施工区画の外部の気圧としての正圧側に近づくように変化し、所定の前記負圧設定値から外れたことが前記負圧施工区画内の圧力を直接検出する前記負圧センサと前記差圧センサとによって検出されることに基づく前記制御装置の制御によって、前記第１の換気集塵装置をバックアップして、前記負圧施工区画内の気圧を前記負圧設定値に維持するとともに、
前記第１の換気集塵装置と前記第２の換気集塵装置は、各々独立した運転時に前記負圧施工区画内の容積の空気を１５分毎に１回以上置換できる風量を備え、
前記第１の換気集塵装置と前記第２の換気集塵装置は、前記制御装置によって、各々独立して前記負圧施工区画内を常時、前記負圧設定値に維持できる能力を有して換気集塵作動可能であり、
前記第１の換気集塵装置によって前記負圧施工区画内が負圧化されている状態では、単独運転中の前記第１の換気集塵装置が前記負圧施工区画内の圧力変化に追従し、前記負圧設定値を維持していることを特徴とする。
The negative pressure monitoring dust collecting apparatus of the present invention for solving the above problems is connected to a negative pressure construction section to be negatively pressured, sucks air in the negative pressure construction section, and dust contained in the air. Ventilation dust collection means for removing negative pressure in the negative pressure construction section by ventilation dust collection exhausted to the outside, atmospheric pressure detection means for detecting the atmospheric pressure inside the negative pressure construction section, and the ventilation collection A control device for controlling the operation of the dust means,
The atmospheric pressure detecting means includes a differential pressure sensor disposed in a partition wall that detects a differential pressure between an internal pressure of the negative pressure construction section and an external pressure, and a negative pressure directly in the negative pressure construction section. And a negative pressure sensor for detecting
The ventilation dust collection means has a first ventilation dust collector, and a second ventilation precipitator, a,
The first ventilation dust collector is used to maintain a negative pressure in the negative pressure construction section, and the second ventilation dust collector is configured so that the negative pressure in the negative pressure construction section is a negative pressure set value. It is made to stand by so that it can always operate for backup when it comes off,
The second ventilation dust collector is maintained by the first ventilation dust collector due to a decrease in air volume due to a failure of the first ventilation dust collector, an inflow of external air from the front chamber or a breakage of the curing sheet. which was the negative pressure in the negative pressure construction compartment is the negative pressure construction changed so as to approach the positive pressure side of an external air pressure of the compartment, said that out of a predetermined of the negative pressure set negative pressure construction compartment the control of based rather the control device to be detected and the negative pressure sensor for detecting directly by the said differential pressure sensor the pressure of the inner, back up the first ventilation precipitator, the negative pressure construction while maintaining pressure in the compartment to the negative pressure setting value,
The first ventilation dust collector and the second ventilation dust collector each have an air volume capable of replacing the volume of air in the negative pressure construction section at least once every 15 minutes during independent operation,
The first ventilation dust collector and the second ventilation dust collector have the ability to always maintain the negative pressure setting section independently at the negative pressure set value by the control device. Ventilation dust collection operation is possible,
In a state where the negative pressure construction section is negatively pressured by the first ventilation dust collection device, the first ventilation dust collection device during single operation follows the pressure change in the negative pressure construction section. The negative pressure set value is maintained .

上記のように構成したことにより、負圧施工区画内の負圧が低下する方向に、例えば負圧施工区画への出入口（前室）からの外部空気の流入によって、その負圧が負圧設定値から外れても、第２の換気集塵装置を換気集塵作動するようにバックアップする機能を具有させているため、負圧施工区画内の負圧を負圧設定値に維持できる。これによって、負圧施工区画内の気圧が正圧側となることがないので、付着物除去によって発生する粉塵の外部への飛散を確実に防止できるように安全性を高めた負圧監視集塵装置を提供できる。 By configuring as described above, the negative pressure is set in the direction in which the negative pressure in the negative pressure construction section decreases, for example, by the inflow of external air from the entrance (front chamber) to the negative pressure construction section. Even if the value deviates from the value, since the second ventilation dust collecting device has a function of backing up so that the ventilation dust collection operation is performed, the negative pressure in the negative pressure construction section can be maintained at the negative pressure set value. As a result, since the atmospheric pressure in the negative pressure construction section does not become the positive pressure side, the negative pressure monitoring dust collector has improved safety so that dust generated by removing the deposits can be reliably prevented from scattering to the outside. Can provide.

上記課題を解決するための本発明の負圧監視集塵装置において、前記第２の換気集塵装置が換気集塵作動され、前記負圧施工区画内の気圧が負圧化されている状態であって、該負圧施工区画内の負圧が真空側に近づくように変化し、前記負圧設定値から外れたことが前記気圧検出手段によって検出されることに基づいて、前記第１の換気集塵装置、前記第２の換気集塵装置の何れか一方若しくは両方を、前記負圧施工区画内の負圧が前記負圧設定値へ復帰される方向に減少させるように、制御することを特徴とすることにより、負圧施工区画の過剰な負圧化を防止することができ、これによって、例えば養生シートが使用されている場合であれば、その養生シート自体の破れや養生シートどうしの連結接続の剥がれなどの構造損傷も防止できることとなる。 In the negative pressure monitoring dust collector of the present invention for solving the above-mentioned problem, the second ventilation dust collector is ventilated and dust-collected, and the atmospheric pressure in the negative pressure construction section is negative. The first ventilation is based on the fact that the negative pressure in the negative pressure construction section changes so as to approach the vacuum side and is detected by the atmospheric pressure detection means to deviate from the negative pressure set value. Controlling one or both of the dust collector and the second ventilation dust collector so that the negative pressure in the negative pressure construction section is reduced in a direction to return to the negative pressure set value. By making it a feature, it is possible to prevent excessive negative pressure in the negative pressure construction section. For example, if a curing sheet is used, the curing sheet itself is broken or the curing sheets are not Can prevent structural damage such as peeling of connection And thus.

また、上記課題を解決するための本発明の負圧監視集塵装置において、前記第１の換気集塵装置の故障、及び／又は前記負圧施工区画に、その内部と外部とが気流連通状態となった際により、前記負圧施工区画内の負圧が当該負圧施工区画の外部の気圧としての正圧側に近づくように変化する状態であることを特徴とすることにより、第１の換気集塵装置の故障や養生シートが破れて負圧施工区画内に外部空気が流入する状態となっても、第２の換気集塵装置を換気集塵作動するようにバックアップする機能を具有させているため、上記と同様なる効果を生じる。また、前記換気集塵手段の換気集塵は排気ファンによって行われ、該排気ファンをインバータ制御することにより、負圧が負圧設定値から外れた際の変動に速やかに追従できるとともに、省電力化も実現できる。また、前記負圧施工区画内における換気集塵作動中の空気の流れと同じ方向に、前記第１の換気集塵装置と前記第２の換気集塵装置とを配設したことを特徴とすることにより、負圧施工区画内の空気の流れによる気圧検出手段の検知バラツキが少なくなり、安定した負圧監視状態を得ることができる負圧監視集塵装置を提供できる。また、前記気圧検出手段によって前記負圧施工区画内の負圧が負圧設定値から外れたことに基づいて、警報が報知されることを特徴とすることにより、前記負圧施工区画内に居る作業者に対して負圧が負圧設定値から外れたことを知らせることができ、これによって付着物除去作業の中止が速やかに実行でき、安全対策上有益な装置を提供できる。 Further, in the negative pressure monitoring dust collecting apparatus of the present invention for solving the above-mentioned problems, the first ventilation dust collecting apparatus has failed and / or the negative pressure construction section has an air flow communication state between the inside and the outside. The first ventilation is characterized by the fact that the negative pressure in the negative pressure construction section changes so as to approach the positive pressure side as the atmospheric pressure outside the negative pressure construction section. Even if the dust collector breaks down or the curing sheet breaks and external air flows into the negative pressure construction section, the second ventilation dust collector has a function to back up so that the ventilation dust collection operation is performed. Therefore, an effect similar to the above is produced. Further, the ventilation dust collection of the ventilation dust collection means is performed by an exhaust fan, and by controlling the exhaust fan with an inverter, it is possible to quickly follow fluctuations when the negative pressure deviates from the negative pressure set value, and to save power. Can also be realized. Further, the first ventilation dust collector and the second ventilation dust collector are disposed in the same direction as the air flow during the ventilation dust collection operation in the negative pressure construction section. Thereby, the detection variation of the atmospheric | air pressure detection means by the flow of the air in a negative pressure construction area reduces, and the negative pressure monitoring dust collector which can acquire the stable negative pressure monitoring state can be provided. Further, an alarm is informed based on the fact that the negative pressure in the negative pressure construction section has deviated from the negative pressure setting value by the atmospheric pressure detecting means, so that it is in the negative pressure construction section. The operator can be informed that the negative pressure has deviated from the negative pressure set value, whereby the deposit removal operation can be quickly stopped, and a device useful for safety measures can be provided.

また、上記課題を解決するための本発明の負圧監視集塵方法は、負圧化されるように仕切られた負圧施工区画内の空気を吸引し、この空気中に含まれる粉塵を除去して外部に排気することにより、前記負圧施工区画内で生じた粉塵を前記負圧施工区画内の負圧を利用して外部に流出させずに集塵する方法であって、
前記負圧施工区画の内部の気圧を検出する気圧検出手段は、前記負圧施工区画の内部の気圧と外部の気圧との差圧を検出する区画隔壁部に配置された差圧センサと、前記負圧施工区画内において負圧を直接的に検出する負圧センサと、によって構成され、
前記負圧施工区画内で生じた粉塵を集塵する換気集塵手段は、第１の換気集塵装置と、第２の換気集塵装置と、によって構成され、
前記第１の換気集塵装置と前記第２の換気集塵装置は、各々独立した運転時に前記負圧施工区画内の容積の空気を１５分毎に１回以上置換できる風量を備え、制御装置によって各々独立して前記負圧施工区画内を常時、設定された負圧に維持できる能力を有して換気集塵作動可能であり、
前記第１の換気集塵装置を換気集塵作動させて、前記負圧施工区画内を負圧化する工程と、検出方式の異なる前記差圧センサと前記負圧センサにより前記負圧施工区画内の気圧を検出する工程と、前記気圧検出手段によって検出された気圧が負圧設定値から外れたか否かを判定する工程と、前記負圧施工区画内の気圧が前記負圧設定値から減少する方向に外れたと判定された際、前記制御装置によって前記第１の換気集塵装置による換気集塵機能を変化させ、前記負圧施工区画内の気圧を前記負圧設定値まで復帰する方向に負圧を増大させて、前記負圧施工区画内を前記負圧設定値に維持する工程と、前記第１の換気集塵装置の故障による風量の低下、前室からの外部空気の流入や養生シートの破れによって前記第１の換気集塵装置によって前記負圧施工区画内の気圧が負圧設定値を維持できないときに、バックアップ用として常に稼働できる状態に待機していた前記第２の換気集塵装置を作動させる工程と、前記制御装置によって前記第２の換気集塵装置による換気集塵機能を変化させ、前記負圧施工区画内の気圧を前記負圧設定値まで復帰する方向に負圧を増大させて、前記負圧施工区画内の気圧を前記負圧設定値に維持する工程と、を含むことを特徴とする。
このため、第２の換気集塵装置にバックアップする機能を具有させているため、第１の換気集塵装置の故障や養生シートの破れなどが発生した時にも施工区画内の負圧を負圧設定値に維持できる。これによって、負圧施工区画内の気圧が正圧側となることがないので、付着物除去によって発生する粉塵の外部への飛散を確実に防止できるように安全性を高めることができる。 Moreover, the negative pressure monitoring dust collection method of the present invention for solving the above-described problem is to suck air in a negative pressure construction section partitioned so as to be negative pressure and remove dust contained in the air. by evacuating to the outside, a method of dust collecting the generated negative pressure construction compartment dust without flowing out by utilizing the negative pressure of the negative pressure construction compartment,
The atmospheric pressure detection means for detecting the atmospheric pressure inside the negative pressure construction section is a differential pressure sensor disposed in the partition wall section for detecting the differential pressure between the atmospheric pressure inside the negative pressure construction section and the external atmospheric pressure, A negative pressure sensor that directly detects the negative pressure in the negative pressure construction section,
The ventilation dust collection means for collecting dust generated in the negative pressure construction section is constituted by a first ventilation dust collection device and a second ventilation dust collection device,
The first ventilation precipitator and the second ventilation precipitator is provided with a flow rate that can be substituted one or more times independently with air volume of the negative pressure construction compartment during operation every 15 minutes, control device each independently always the negative pressure construction ku picture in the are possible ventilation dust collection operation have the ability to maintain a negative pressure that has been set,
A step of causing the first ventilation dust collecting device to perform a ventilation and dust collecting operation to make the negative pressure construction section negative pressure, and the differential pressure sensor and the negative pressure sensor having different detection methods in the negative pressure construction section. Detecting the atmospheric pressure, determining whether or not the atmospheric pressure detected by the atmospheric pressure detection means deviates from the negative pressure setting value, and reducing the atmospheric pressure in the negative pressure construction section from the negative pressure setting value. When it is determined that the pressure is out of the direction, the control device changes the ventilation dust collection function of the first ventilation dust collection device, and the negative pressure in the direction to return the atmospheric pressure in the negative pressure construction section to the negative pressure set value. And maintaining the inside of the negative pressure construction section at the negative pressure set value, a decrease in air volume due to a failure of the first ventilation dust collector, an inflow of external air from the front chamber and a curing sheet By the first ventilation dust collector by tearing The serial when pressure in the negative pressure construction compartment can not maintain a negative pressure setpoint, a step of activating the always the second ventilation precipitator on standby ready to operate as a backup, by the control device changing ventilation dust collecting function by second ventilation precipitator, said to increase the negative pressure air pressure in the negative pressure construction compartment in the direction of returning to the negative pressure set, pressure of the negative pressure construction compartment the characterized in that it comprises a a step that maintain the negative pressure setpoint.
For this reason, since the second ventilation dust collector is provided with a backup function, the negative pressure in the construction section can be reduced even if the first ventilation dust collector fails or the curing sheet breaks. The set value can be maintained. Thereby, since the atmospheric | air pressure in a negative pressure construction division does not become a positive pressure side, safety | security can be improved so that the scattering of the dust which generate | occur | produces by adhering substance removal to the exterior can be prevented reliably.

また、上記課題を解決するための本発明の負圧監視集塵方法において、前記第２の換気集塵装置が換気集塵作動され、前記施工区画内の気圧が負圧化されている状態であって、該施工区画内の負圧が真空側に近づくように変化し、前記負圧設定値から外れたか否かを判定する工程と、前記施工区画内の気圧が前記負圧設定値から真空側に増大する方向に外れたと判定された際、前記第１の換気集塵装置、前記第２の換気集塵装置の何れか一方若しくは両方を、前記施工区画内の負圧が前記負圧設定値へ復帰される方向に減少させる工程と、を含むことを特徴とすることにより、負圧施工区画の過剰な負圧化を防止することができ、これによって、例えば養生シートが使用されている場合であれば、その養生シート自体の破れや養生シートどうしの連結接続の剥がれなどの構造損傷も防止できることとなる。 Moreover, in the negative pressure monitoring dust collection method of the present invention for solving the above-described problem, the second ventilation dust collection device is operated by ventilation dust collection, and the atmospheric pressure in the construction section is negative. And the step of determining whether or not the negative pressure in the construction section is closer to the vacuum side and deviates from the negative pressure setting value, and the atmospheric pressure in the construction section is vacuumed from the negative pressure setting value. When it is determined that the first ventilation dust collector, the second ventilation dust collector, or both of the first ventilation dust collector and the second ventilation dust collector are determined, the negative pressure in the construction section is set to the negative pressure. And reducing the pressure in the direction of returning to the value, it is possible to prevent excessive negative pressure in the negative pressure construction section, and thereby, for example, a curing sheet is used If so, break the curing sheet itself or Structural damage, such as peeling of the coupling connection may be can be prevented.

また、上記課題を解決するための本発明の負圧監視集塵方法において、前記負圧設定値は単一の負圧値であることを特徴とすることにより、その負圧値の設定に使用する部品として、構造が簡易なスイッチ動作（開閉）によって信号を制御装置に送るものである気圧検出手段を採用することができる。また、前記負圧設定値は所定範囲の負圧範囲値であることを特徴とすることにより、施工区画内への作業者の出入りが頻繁に行われる状況であれば、その出入りによる負圧の変化を負圧範囲値内とすることができ、これによって施工区画の損傷などによって生じる負圧が負圧設定値を外れたこと以外の制御を不要にできる。 Further, in the negative pressure monitoring dust collection method of the present invention for solving the above-mentioned problems, the negative pressure set value is a single negative pressure value, and is used for setting the negative pressure value. As a part to be used, it is possible to adopt an atmospheric pressure detecting means that sends a signal to the control device by a switch operation (opening / closing) with a simple structure. In addition, the negative pressure set value is a negative pressure range value within a predetermined range, so that if the operator frequently enters and exits the construction section, the negative pressure due to the entry / exit is reduced. The change can be made within the negative pressure range value, thereby making it possible to eliminate the need for control other than that the negative pressure caused by damage to the construction section deviates from the negative pressure set value.

本発明に係る負圧監視集塵装置を示す平面模式図。The plane schematic diagram which shows the negative pressure monitoring dust collector which concerns on this invention. 換気集塵装置の模式図。The schematic diagram of a ventilation dust collector. 制御装置の電気的ブロック図。The electric block diagram of a control apparatus. 差圧と電圧・電流との関係を示すグラフ。The graph which shows the relationship between differential pressure, voltage, and current. 負圧監視制御処理のフローを示す図。The figure which shows the flow of a negative pressure monitoring control process. 図５の処理フローでの負圧変化を示すグラフ。The graph which shows the negative pressure change in the processing flow of FIG. 負圧監視制御処理の他のフローを示す図。The figure which shows the other flow of a negative pressure monitoring control process. 負圧監視制御処理の他のフローを示す図。The figure which shows the other flow of a negative pressure monitoring control process. 負圧監視制御処理の他のフローを示す図。The figure which shows the other flow of a negative pressure monitoring control process. 図７ないし９の処理フローでの負圧変化を示すグラフ。The graph which shows the negative pressure change in the processing flow of FIG.

以下、本発明の実施の形態を図面に基づいて説明する。図１は、本発明に係る負圧監視集塵装置を示す平面模式図である。図１において、負圧監視集塵装置１は、建築物その他の施設を含む構造物２の柱、梁、壁面、天井面などのダイオキシン類、アスベスト、放射性物質、塗料材、塵埃などの付着物としての有害物質で、その一例としてアスベストを含む吹付材などの除去を行う際に、発生するアスベストの粉塵が施工区域外に飛散することを防止するため、その施工区域を養生シート３で養生した負圧化されるように仕切られた負圧施工区画（施工区画）４を含めて設置される。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing a negative pressure monitoring dust collecting apparatus according to the present invention. In FIG. 1, the negative pressure monitoring dust collecting apparatus 1 is a deposit 2 such as dioxins such as pillars, beams, wall surfaces, ceiling surfaces, asbestos, radioactive substances, paint materials, and dust of structures 2 including buildings and other facilities. As an example, when removing spray materials containing asbestos, etc., the construction area was cured with the curing sheet 3 to prevent the generated asbestos dust from scattering outside the construction area. It is installed including a negative pressure construction section (construction section) 4 partitioned so as to be negative pressure.

この負圧施工区画４を養生する養生シート３は、プラスチックとしてのポリエチレンテレフタレート（ＰＥＴ樹脂）によってシート状に成形されている。この養生シート３を床面、壁面、天井面などを覆うようにして張って養生する。また、養生シート３の厚みとして、本例ではアスベスト処理のために規制されているように、床面に使用する場合においては、厚さ０．１５ｍｍ以上のものが複層（２重）で使用され、また、壁面、天井面に施工する場合においては、厚さ０．０８ｍｍ以上のものが単層で使用される。 The curing sheet 3 for curing the negative pressure construction section 4 is formed into a sheet shape from polyethylene terephthalate (PET resin) as plastic. The curing sheet 3 is stretched and cured so as to cover the floor surface, wall surface, ceiling surface and the like. In addition, as the thickness of the curing sheet 3 is regulated for asbestos treatment in this example, when used on the floor surface, a sheet having a thickness of 0.15 mm or more is used in multiple layers (double). In addition, in the case of construction on a wall surface or a ceiling surface, one having a thickness of 0.08 mm or more is used as a single layer.

また、負圧施工区画４には、この区画内への作業者の出入りのための更衣室、エアーシャワーを備えた洗浄室などを有するセキュリティゾーンとしての前室５が附設される。この前室５はアスベストの粉塵が負圧施工区画４から外部へ漏洩することを防止するために設けられ、かつ、後述する換気集塵手段６によって負圧施工区画４内を負圧化しているときに、外部空気を取り入れるために利用するものでもある。 In addition, the negative pressure construction section 4 is provided with a front room 5 as a security zone having a changing room for workers to enter and leave the section and a washing room equipped with an air shower. The front chamber 5 is provided to prevent asbestos dust from leaking from the negative pressure work section 4 to the outside, and the negative pressure work section 4 is negatively pressured by ventilation dust collecting means 6 described later. Sometimes used to take in external air.

この負圧施工区画４には、その区画内部を外部の気圧としての正圧（大気圧）に対して所定の負圧状態にする換気集塵手段６が外部側に配置されて接続されている。かかる換気集塵手段６は、少なくとも２台の第１の換気集塵装置７と第２の換気集塵装置８とを有し、この第１の換気集塵装置７と第２の換気集塵装置８とは、隣りに並べられて並設され、換気集塵作動中の空気の流れを同じ方向となすようにしている。 The negative pressure construction section 4 is connected to a ventilation dust collecting means 6 which is disposed outside on the outside to make a predetermined negative pressure state with respect to a positive pressure (atmospheric pressure) as an external atmospheric pressure. . The ventilation dust collection means 6 has at least two first ventilation dust collection devices 7 and a second ventilation dust collection device 8, and the first ventilation dust collection device 7 and the second ventilation dust collection device 8. The apparatus 8 is arranged next to each other so that the air flow during the ventilation dust collection operation is in the same direction.

また、第１の換気集塵装置７、第２の換気集塵装置８は、それぞれが負圧施工区画４内の容積の空気を、１５分毎に１回以上、置換できる風量を備え、かつ、負圧施工区画４内を常時、設定された負圧に維持できる能力を有している。この第１の換気集塵装置７、第２の換気集塵装置８は、負圧施工区画４内の容積に応じて適宜、その設置数や風量能力を選定するものであり、要するに第１の換気集塵装置７、第２の換気集塵装置８の内、一方を負圧施工区画４内を負圧にするために主として使用し、他方を後述するように負圧施工区画４内の負圧が負圧設定値から外れた際のバックアップ用として、常に即座に稼動できるように待機させるように構成している。 The first ventilation dust collector 7 and the second ventilation dust collector 8 each have an air volume that can replace the volume of air in the negative pressure construction section 4 at least once every 15 minutes, and The negative pressure construction section 4 has the ability to always maintain the set negative pressure. The first ventilation dust collector 7 and the second ventilation dust collector 8 select the number of installations and the air flow capacity as appropriate according to the volume in the negative pressure construction section 4. One of the ventilation dust collection device 7 and the second ventilation dust collection device 8 is mainly used to make the negative pressure construction section 4 negative pressure, and the other is negative in the negative pressure construction section 4 as described later. As a backup for when the pressure deviates from the negative pressure set value, it is configured to always stand by so that it can be operated immediately.

この第１の換気集塵装置７、第２の換気集塵装置８としての換気集塵手段６は図２に示すように、装置本体９には、吸引口９Ａと排気口９Ｂが形成され、その内部連通空間９Ｃには、換気ＨＥＰＡフィルタ１０と、商用電力を利用して作動する換気モータ１１によって回転する換気ファン１２が内装される。そして、負圧施工区画４内のアスベストの粉塵を含む空気を吸引口９Ａを介して換気ファン１２で吸い込むことにより、アスベストの粉塵を換気ＨＥＰＡフィルタ１０によって捕捉・集塵している。これによって清浄化した空気を排気口９Ｂから外部に排気するように換気集塵して、負圧施工区画４内の気圧を外部に対して負圧状態とするようにしている。 As shown in FIG. 2, the ventilation dust collection means 6 as the first ventilation dust collection device 7 and the second ventilation dust collection device 8 has a suction port 9 </ b> A and an exhaust port 9 </ b> B formed in the device body 9. The internal communication space 9C includes a ventilation HEPA filter 10 and a ventilation fan 12 that is rotated by a ventilation motor 11 that operates using commercial power. The asbestos dust is captured and collected by the ventilation HEPA filter 10 by sucking air containing asbestos dust in the negative pressure construction section 4 by the ventilation fan 12 through the suction port 9A. The air thus purified is collected by ventilation so that the air is exhausted to the outside from the exhaust port 9B, so that the air pressure in the negative pressure construction section 4 is in a negative pressure state with respect to the outside.

この換気ＨＥＰＡフィルタ１０としては、ＨＥＰＡフィルタ（High Efficiency Particulate Air Filter）が使用され、このＨＥＰＡフィルターにおける微粒子の捕集は、「濾遇（ふるい効果）」、「慣性（衝突）」、「さえぎり（静電吸着）」、「拡散（ブラウン運動）」の原理を応用しており、ＪＩＳ規格におけるＪＩＳＺ８１２２で定義されるごとく、最も捕りにくいとされる０．３ミクロンの粒子を９９．９７％以上捕集できるものである。なお、大きな粒子によって目詰まりを起こすのを防ぐため、前置フィルタ１３（主に５ミクロン以上の粒子を捕集する性能をもつ）及び中間フィルタ１４（主に５ミクロンより小さい粒子を捕集する性能をもつ）を装着している。 As this ventilation HEPA filter 10, a HEPA filter (High Efficiency Particulate Air Filter) is used, and the collection of particulates in this HEPA filter is “filtering (sieving effect)”, “inertia (collision)”, “cutting-off ( It applies the principle of "electrostatic adsorption" and "diffusion (Brownian motion)" and, as defined by JISZ8122 in the JIS standard, captures 99.97% or more of 0.3 micron particles that are considered to be the most difficult to catch. It can be collected. In order to prevent clogging caused by large particles, the pre-filter 13 (having the ability to collect mainly particles of 5 microns or more) and the intermediate filter 14 (mainly collecting particles smaller than 5 microns). Equipped with performance).

換気集塵手段６（第１の換気集塵装置７、第２の換気集塵装置８）は、図３に示すように、電気的に接続される制御装置１５によって、各々独立して換気集塵作動制御される。この換気集塵の作動制御は、基本的な作動・停止に加え、風量調整のために換気モータ１１の回転数を可変させるインバータ制御機能や、換気ＨＥＰＡフィルタ１０、前置フィルタ１３、中間フィルタ１４の目詰まりによる換気モータ１１の過負荷状態や、吸引口９Ａと排気口９Ｂとの間の差圧低下（圧力差が小さい）に基づく換気集塵機能の低下などでの停止や減速などの制御が実行される。 As shown in FIG. 3, the ventilation dust collection means 6 (the first ventilation dust collection device 7 and the second ventilation dust collection device 8) are independently ventilated and collected by a control device 15 which is electrically connected. Dust operation is controlled. This ventilation dust collection operation control is performed in addition to basic activation / deactivation, an inverter control function for varying the rotation speed of the ventilation motor 11 for air volume adjustment, a ventilation HEPA filter 10, a pre-filter 13, and an intermediate filter 14. Control such as stop or deceleration due to the overload state of the ventilation motor 11 due to clogging of the air or the reduction of the ventilation dust collection function based on the difference in pressure difference between the suction port 9A and the exhaust port 9B (small pressure difference). Executed.

この制御装置１５は、商用電力を利用するマイコン（シーケンサーを含む）が使用される。このマイコンの構成は、周知であるため詳しい説明は省略するが、演算装置であるＣＰＵ１６、また、自己の処理を規定する各種のプログラム１７（インバータ制御、過負荷制御、シーケンスなどのプログラム）や処理に必要な固定データを格納する設定テーブル１８を有するＲＯＭ１９、また、ＣＰＵ１６の行う処理の過程で発生するデータを格納するデータエリアや処理の過程で使用するワークエリアを有するＲＡＭ２０からなるメモリ、また、入出力インターフェイス（Ｉ／Ｆ）２１などがバス２２により相互に送受信可能にシステム的に接続されている。 The control device 15 uses a microcomputer (including a sequencer) that uses commercial power. Since the configuration of this microcomputer is well known, detailed description is omitted, but the CPU 16 that is an arithmetic unit, and various programs 17 (programs such as inverter control, overload control, and sequence) and processing that define its own processing A ROM 19 having a setting table 18 for storing fixed data necessary for the memory, a memory comprising a RAM 20 having a data area for storing data generated in the process of the CPU 16 and a work area used in the process, An input / output interface (I / F) 21 and the like are systematically connected via a bus 22 so as to be able to transmit and receive each other.

この制御装置１５には、負圧施工区画４内の圧力を検出するように配設される気圧検出手段としての気圧センサ部２３が入出力インターフェイス２１を介して接続されている。この気圧センサ部２３はマノメーターや歪みゲージを利用した差圧センサ２４を使用している。該差圧センサ２４は、負圧施工区画４の内部の気圧（内圧）と外部の気圧（外圧）との差圧に基づいて、電気接点２４Ａのスイッチ動作（開閉）により電気信号としての検出信号を制御装置１５に送るものである。この差圧センサ２４は、予め所定の差圧を負圧設定値としての負圧値とすることができ、施工現場に応じて、−４Ｐａから−１５Ｐａの間の任意の単一の負圧値を負圧設定値としている。なお、内圧と外圧は検出パイプ２４Ｂを介して検出される。 An atmospheric pressure sensor unit 23 is connected to the control device 15 via an input / output interface 21 as atmospheric pressure detection means arranged to detect the pressure in the negative pressure construction section 4. The atmospheric pressure sensor unit 23 uses a differential pressure sensor 24 using a manometer or a strain gauge. The differential pressure sensor 24 is a detection signal as an electrical signal based on the switch operation (opening / closing) of the electrical contact 24A based on the differential pressure between the atmospheric pressure (internal pressure) inside the negative pressure construction section 4 and the external atmospheric pressure (external pressure). Is sent to the control device 15. The differential pressure sensor 24 can set a predetermined differential pressure as a negative pressure value as a negative pressure set value in advance, and any single negative pressure value between −4 Pa and −15 Pa depending on the construction site. Is the negative pressure set value. The internal pressure and the external pressure are detected via the detection pipe 24B.

このように差圧センサ２４は、負圧施工区画４の内部の内圧と外部の外圧との差圧が負圧設定値としての負圧値から減少する方向に外れた場合、すなわち負圧施工区画４内の負圧が外部の気圧としての正圧側（大気側）に近づくように変化し、所定の負圧設定値としての負圧値から外れた場合にスイッチ動作（電気接点２４Ａ）して、入出力インターフェイス２１を介して検出信号が制御装置１５に入力される。制御装置１５のＣＰＵ１６は、ＲＯＭ１９に記憶されたプログラム１７に従って、入力された検出信号の判定処理を行う。この判定処理の結果によって各種処理が実行される。 As described above, the differential pressure sensor 24 is used when the differential pressure between the internal pressure inside the negative pressure application section 4 and the external pressure outside the negative pressure setting section deviates from the negative pressure value as the negative pressure set value. When the negative pressure in 4 changes so as to approach the positive pressure side (atmosphere side) as the external atmospheric pressure, and deviates from the negative pressure value as the predetermined negative pressure setting value, the switch operation (electrical contact 24A), A detection signal is input to the control device 15 via the input / output interface 21. The CPU 16 of the control device 15 performs determination processing of the input detection signal according to the program 17 stored in the ROM 19. Various processes are executed according to the result of the determination process.

また、図４に示すように、差圧センサ２４は、電気信号としてアンプを内蔵した電流出力タイプや電圧出力タイプのものを使用し、差圧に応じて比例する電流値、電圧値を検出信号として使用することも可能である。この差圧センサ２４によれば、負圧施工区画４の内部の内圧と外部の外圧との差圧が負圧設定値としての所定範囲の負圧範囲値（−４Ｐａから−１５Ｐａの上下限）から外れた場合に、入出力インターフェイス２１を介して制御装置１５に入力される検出信号に基づいて、制御装置１５のＣＰＵ１６は、ＲＯＭ１９に記憶されたプログラム１７に従って、入力された検出信号の判定処理を行う。この判定処理の結果によって、例えば換気モータ１１の回転数をインバータ制御によって可変するようにして風量を可変し、かかる差圧を負圧範囲値内に復帰させる制御などの各種処理が実行される。 As shown in FIG. 4, the differential pressure sensor 24 uses a current output type or a voltage output type with an amplifier built in as an electrical signal, and detects a current value and a voltage value proportional to the differential pressure as a detection signal. It can also be used. According to the differential pressure sensor 24, the differential pressure between the internal pressure inside the negative pressure construction section 4 and the external pressure outside is a predetermined negative pressure range value as a negative pressure set value (upper and lower limits from −4 Pa to −15 Pa). The CPU 16 of the control device 15 determines the input detection signal in accordance with the program 17 stored in the ROM 19 based on the detection signal input to the control device 15 via the input / output interface 21 when it is out of the range. I do. Depending on the result of this determination process, for example, various processes such as a control for changing the air volume by changing the rotation speed of the ventilation motor 11 by inverter control and returning the differential pressure within the negative pressure range value are executed.

また、制御装置１５には、主警報装置２６が入出力インターフェイス２１を介して接続されている。この主警報装置２６は、差圧センサ２４の応答に基づき負圧施工区画４内の負圧が正圧側又は真空側に近づくように、負圧が負圧設定値から外れた状態であると制御装置１５が判定すると、該制御装置１５によって主警報装置２６を構成するＬＥＤなどの発光源が点灯して周囲に知らせる警報ランプ２７と、スピーカーからブザー音を発する警報ブザー２８を作動させて警報を報知する。この警報制御は発光源の点灯、ブザー音の一方とすることも可能である。 A main alarm device 26 is connected to the control device 15 via the input / output interface 21. The main alarm device 26 controls that the negative pressure deviates from the negative pressure set value so that the negative pressure in the negative pressure construction section 4 approaches the positive pressure side or the vacuum side based on the response of the differential pressure sensor 24. When the device 15 determines, the control device 15 activates an alarm lamp 27 that turns on a light source such as an LED that constitutes the main alarm device 26 to notify the surroundings, and an alarm buzzer 28 that emits a buzzer sound from a speaker to generate an alarm. Inform. This alarm control can be one of lighting of the light source and buzzer sound.

この気圧センサ部２３として差圧センサ２４以外に、負圧施工区画４内の負圧を直接的に、検出パイプ２９Ａを介して検出するマノメーターや歪みゲージを利用した負圧センサ２９を配設している。この負圧センサ２９も制御装置１５に入出力インターフェイス２１を介して接続することができる。この負圧センサ２９は電気的に独立した内部電源３０を備えており、該負圧センサ２９によって、負圧施工区画４内の負圧が正圧側又は真空側に近づくように、負圧が負圧設定値から外れた状態を検出すると、差圧センサ２４と同様に、入力インターフェイス２１を介して検出信号が制御装置１５に入力される。制御装置１５のＣＰＵ１６は、ＲＯＭ１９に記憶されたプログラム１７に従って、入力された検出信号の判定処理を行う。この判定処理の結果によって各種処理が実行される。また、負圧センサ２９は警報機能を備えており、負圧センサ２９に内装される無線送信手段３１から警報信号が送信される。この警報信号は、無線受信手段３２を備え、電気的に独立した補助内部電源３３を備えた補助警報装置３４が受信すると、該補助警報装置３４は、ＬＥＤなどの発光源が点灯して周囲に知らせる補助警報ランプ３５と、スピーカーからブザー音を発する補助警報ブザー３６とによって警報を報知する。この警報制御も発光源の点灯、ブザー音の一方とすることが可能である。 In addition to the differential pressure sensor 24, a negative pressure sensor 29 using a manometer or a strain gauge that directly detects the negative pressure in the negative pressure construction section 4 via the detection pipe 29A is disposed as the atmospheric pressure sensor unit 23. ing. This negative pressure sensor 29 can also be connected to the control device 15 via the input / output interface 21. The negative pressure sensor 29 is provided with an electrically independent internal power supply 30, and the negative pressure is reduced by the negative pressure sensor 29 so that the negative pressure in the negative pressure application section 4 approaches the positive pressure side or the vacuum side. When a state deviating from the pressure set value is detected, a detection signal is input to the control device 15 via the input interface 21 as in the differential pressure sensor 24. The CPU 16 of the control device 15 performs determination processing of the input detection signal according to the program 17 stored in the ROM 19. Various processes are executed according to the result of the determination process. Further, the negative pressure sensor 29 has an alarm function, and an alarm signal is transmitted from the wireless transmission means 31 built in the negative pressure sensor 29. When this alarm signal is received by an auxiliary alarm device 34 having a wireless receiving means 32 and an electrically independent auxiliary internal power supply 33, the auxiliary alarm device 34 turns on a light-emitting source such as an LED, and so on. An alarm is notified by an auxiliary alarm lamp 35 for notification and an auxiliary alarm buzzer 36 for emitting a buzzer sound from a speaker. This alarm control can also be one of lighting light source and buzzer sound.

この負圧センサ２９の配設個所は負圧施工区画４内外の任意位置に設置することができ、この負圧センサ２９による警報信号の送信エリア内に補助警報装置３４を設置している。このように差圧センサ２４とは、別電源で作動する負圧センサ２９を備えることにより、商用電力の停電発生時においても、負圧施工区画４内の負圧が負圧設定値から外れたことを確実に事前に知ることができることとなる。なお、負圧施工区画４内には、この区画内に居る作業者が目視で負圧を確認するためのアナログ指針式の差圧計３７を配設することもできる。このように負圧施工区画４の内部の圧力と外部の圧力との差圧を検出する差圧センサ２４と、負圧施工区画４内の負圧を直接的に検出する負圧センサ２９を有しており、負圧施工区画４の負圧が負圧設定値から外れることの検出は、差圧センサ２４と負圧センサ２９の何れか一方で可能であり、これによって負圧が負圧設定値から外れることが未検出となることを防止できる二重安全対策とすることができ、負圧が負圧設定値から外れることを確実に検出するようにして安全性を高めている。なお、換気集塵手段６の差圧を検出するものとしては、差圧センサ２４、負圧センサ２９を使用することもできる。 The place where the negative pressure sensor 29 is disposed can be installed at an arbitrary position inside or outside the negative pressure construction section 4, and an auxiliary alarm device 34 is installed in an alarm signal transmission area by the negative pressure sensor 29. Thus, by providing the negative pressure sensor 29 that operates with a separate power source from the differential pressure sensor 24, the negative pressure in the negative pressure construction section 4 deviates from the negative pressure setting value even when a commercial power outage occurs. It will be possible to know in advance surely. In the negative pressure construction section 4, an analog pointer-type differential pressure gauge 37 can be arranged for an operator in the section to confirm the negative pressure by visual observation. Thus, the differential pressure sensor 24 that detects the differential pressure between the internal pressure of the negative pressure construction section 4 and the external pressure, and the negative pressure sensor 29 that directly detects the negative pressure in the negative pressure construction section 4 are provided. Therefore, it is possible to detect that the negative pressure in the negative pressure construction section 4 deviates from the negative pressure setting value by either one of the differential pressure sensor 24 and the negative pressure sensor 29, whereby the negative pressure is set to the negative pressure. It can be a double safety measure that can prevent the deviation from the value from being undetected, and the safety is improved by reliably detecting that the negative pressure deviates from the negative pressure set value. Note that the differential pressure sensor 24 and the negative pressure sensor 29 can be used to detect the differential pressure of the ventilation dust collecting means 6.

次に、本発明に係る負圧監視集塵方法としての負圧監視制御処理ついて、図５に基づいて工程（ステップ）順に説明する。養生シート３で養生される負圧施工区画４内の負圧監視制御処理として、制御装置１５の電源投入によって商用電力が供給されると（ステップＳ１）、ＲＯＭ１９のプログラム１７によって制御装置１５は初期設定される（ステップＳ２）。続いて、負圧施工区画４内外の負圧（差圧）として「−４Ｐａから−１５Ｐａ」の間の任意の負圧設定値としての単一の負圧値の入力の有無を監視する（ステップＳ３）。かかる負圧値の入力があった場合に、負圧施工区画４内を負圧化するために、換気集塵手段６における一方の第１の換気集塵装置７の選択の有無を監視する（ステップＳ４）。この第１の換気集塵装置７の選択があった場合に、第１の換気集塵装置７の換気集塵作動が定速制御若しくはインバーター制御で実行される（ステップＳ５）。 Next, the negative pressure monitoring control process as the negative pressure monitoring dust collecting method according to the present invention will be described in the order of steps based on FIG. As a negative pressure monitoring control process in the negative pressure construction section 4 cured with the curing sheet 3, when the commercial power is supplied by turning on the power of the control device 15 (step S1), the control device 15 is initialized by the program 17 of the ROM 19 It is set (step S2). Subsequently, the presence / absence of input of a single negative pressure value as an arbitrary negative pressure set value between “−4 Pa and −15 Pa” as the negative pressure (differential pressure) inside and outside the negative pressure construction section 4 is monitored (step) S3). When such a negative pressure value is input, the presence or absence of selection of one first ventilation dust collecting device 7 in the ventilation dust collecting means 6 is monitored in order to make negative pressure inside the negative pressure construction section 4 ( Step S4). When the first ventilation dust collector 7 is selected, the ventilation dust collection operation of the first ventilation dust collector 7 is executed by constant speed control or inverter control (step S5).

次に、負圧施工区画４内の負圧低下前として検出する負圧（差圧）が、負圧設定値としての負圧値から外れたときの気圧センサ部２３（差圧センサ２４、負圧センサ２９）からの検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧設定値としての負圧値から外れたか否かを判定する（ステップＳ６）。この負圧が負圧値から外れたことの発生があった場合に、待機状態である換気集塵手段６における他方の第２の換気集塵装置８の換気集塵作動が定速制御若しくはインバーター制御で実行され、負圧施工区画４内の負圧を負圧設定値としての負圧値まで復帰させるようにして負圧を維持する（ステップＳ７）。続いて、差圧センサ２４の検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧設定値としての負圧値に復帰された否かを判定する（ステップＳ８）。この判定により負圧設定値としての負圧値に復帰しなかった場合に、主警報装置２６の警報ランプ２７、警報ブザー２８による警報が報知され、負圧が負圧値から外れることが発生するおそれがあることを事前に知らせる（ステップＳ９）。その後、タイマー機能によって一定時間が経過したと判断されると（ステップＳ１０）。第１の換気集塵装置７と第２の換気集塵装置８が停止される（ステップＳ１１）。これによって負圧施工区画４でのアスベスト除去作業を中止し、負圧が負圧値から外れたことが生じた原因の調査や、その後のメンテナンスを行うこととなる。 Next, when the negative pressure (differential pressure) detected before the negative pressure drop in the negative pressure construction section 4 deviates from the negative pressure value as the negative pressure set value, the atmospheric pressure sensor unit 23 (differential pressure sensor 24, negative The detection signal from the pressure sensor 29) is monitored, and based on the program 17 of the ROM 19, it is determined whether or not the negative pressure value as the negative pressure set value is deviated (step S6). When the negative pressure has deviated from the negative pressure value, the ventilation dust collection operation of the other second ventilation dust collection device 8 in the ventilation dust collection means 6 in the standby state is controlled at a constant speed or by an inverter. The negative pressure is maintained by performing the control so as to return the negative pressure in the negative pressure construction section 4 to the negative pressure value as the negative pressure setting value (step S7). Subsequently, the detection signal of the differential pressure sensor 24 is monitored, and it is determined whether or not the negative pressure value as the negative pressure set value has been restored based on the program 17 of the ROM 19 (step S8). If the negative pressure value as the negative pressure set value is not restored by this determination, an alarm is issued by the alarm lamp 27 and the alarm buzzer 28 of the main alarm device 26, and the negative pressure deviates from the negative pressure value. Inform in advance that there is a risk (step S9). Thereafter, when it is determined by the timer function that a certain time has elapsed (step S10). The first ventilation dust collector 7 and the second ventilation dust collector 8 are stopped (step S11). As a result, the asbestos removal operation in the negative pressure construction section 4 is stopped, and the cause of the occurrence of the negative pressure deviating from the negative pressure value and the subsequent maintenance are performed.

また、本例による負圧の変化状態の制御例について、図６の負圧変化グラフに基づいて説明する。図６の横軸（時間）におけるＴ１からＴ２までの範囲は、アスベスト除去作業前の負圧施工区画４内の気圧（大気圧）を、制御装置１５による定速制御若しくはインバーター制御によって換気集塵作動される第１の換気集塵装置７により、ノミナル値で示す負圧値に維持される状態を表している。また、Ｔ２からＴ３までの範囲は、負圧値が外部の気圧としての正圧側に近づくように、第１の換気集塵装置７の故障による換気集塵における風量低下、負圧施工区画４の内部と外部とが気流連通状態となった際の前室５からの外部空気の流入、養生シート３の破れなどによって、変化して外れた状態となった際、制御装置１５による定速制御若しくはインバーター制御によって第２の換気集塵装置８を換気集塵作動させ、負圧施工区画４内の気圧を負圧値まで復帰させる状態を表している。 In addition, a control example of the change state of the negative pressure according to this example will be described based on the negative pressure change graph of FIG. The range from T1 to T2 on the horizontal axis (time) in FIG. 6 indicates that the atmospheric pressure (atmospheric pressure) in the negative pressure construction section 4 before the asbestos removal work is ventilated and collected by constant speed control or inverter control by the control device 15. This represents a state in which the negative pressure value indicated by the nominal value is maintained by the activated first ventilation dust collector 7. Also, the range from T2 to T3 is such that the negative pressure value approaches the positive pressure side as the external atmospheric pressure, the air volume drop in the ventilation dust collection due to the failure of the first ventilation dust collection device 7, the negative pressure construction section 4 When the inside and the outside are in a state where they change and are removed due to the inflow of external air from the front chamber 5 when the air communication state is established, the tearing of the curing sheet 3, etc., the constant speed control by the control device 15 or This represents a state in which the second ventilation dust collecting device 8 is ventilated and dust-collected by inverter control, and the atmospheric pressure in the negative pressure construction section 4 is returned to the negative pressure value.

次に、負圧監視制御処理の他の例について図７に基づいて工程（ステップ）順に説明する。制御装置１５の電源投入によって商用電力が供給されると（ステップＳ１）、ＲＯＭ１９のプログラム１７によって制御装置１５は初期設定される（ステップＳ２）。続いて、負圧施工区画４内外の負圧（差圧）として「−４Ｐａから−１５Ｐａ」の負圧設定値としての所定範囲の負圧範囲値の入力の有無を監視する（ステップＳ３０）。かかる負圧範囲値の入力があった場合に、負圧施工区画４内を負圧化するために、換気集塵装置部６における一方の第１の換気集塵装置７の選択の有無を監視する（ステップＳ４０）。この第１の換気集塵装置７の選択があった場合に、第１の換気集塵装置７の換気集塵作動が定速制御若しくはインバーター制御で実行される（ステップＳ５０）。 Next, another example of the negative pressure monitoring control process will be described in the order of steps (steps) based on FIG. When commercial power is supplied by turning on the power of the control device 15 (step S1), the control device 15 is initialized by the program 17 of the ROM 19 (step S2). Subsequently, the presence / absence of a negative pressure range value in a predetermined range as a negative pressure set value of “−4 Pa to −15 Pa” is monitored as a negative pressure (differential pressure) inside and outside the negative pressure construction section 4 (step S30). When such a negative pressure range value is input, the presence or absence of selection of one first ventilation dust collector 7 in the ventilation dust collector section 6 is monitored in order to reduce the pressure in the negative pressure construction section 4. (Step S40). When the first ventilation dust collector 7 is selected, the ventilation dust collection operation of the first ventilation dust collector 7 is executed by constant speed control or inverter control (step S50).

次に、負圧施工区画４内の負圧低下前として検出する負圧（差圧）が、負圧設定値としての負圧範囲値の下限値（−４Ｐａ）から外れたときの気圧センサ部２３からの検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧（差圧）が負圧設定値としての負圧範囲値から外れたか否かを判定する（ステップＳ６０）。この負圧が負圧範囲値から外れたことの発生があった場合に、待機状態である換気集塵手段６における他方の第２の換気集塵装置８の換気集塵作動が定速制御若しくはインバーター制御で実行され、負圧施工区画４内の負圧を負圧設定値としての負圧範囲値まで復帰させるようにして負圧を維持する（ステップＳ７０）。続いて、気圧センサ部２３の検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧設定値としての負圧範囲値に復帰された否かを判定する（ステップＳ８０）。この判定により負圧設定値としての負圧範囲値に復帰しなかった場合に、主警報装置２６の警報ランプ２７、警報ブザー２８による警報が報知され、負圧が負圧範囲値から外れることが発生するおそれがあることを事前に知らせる（ステップＳ９０）。その後、タイマー機能によって一定時間が経過したと判断されると（ステップＳ１００）。第１の換気集塵装置７と第２の換気集塵装置８が停止される（ステップＳ１１０）。これによって負圧施工区画４でのアスベスト除去作業を中止し、負圧が負圧値から外れたことが生じた原因の調査や、その後のメンテナンスを行うこととなる。 Next, the barometric pressure sensor unit when the negative pressure (differential pressure) detected before the negative pressure drop in the negative pressure construction section 4 deviates from the lower limit value (−4 Pa) of the negative pressure range value as the negative pressure set value. The detection signal from 23 is monitored, and based on the program 17 of the ROM 19, it is determined whether or not the negative pressure (differential pressure) is out of the negative pressure range value as the negative pressure set value (step S60). When the negative pressure is out of the negative pressure range value, the ventilation dust collection operation of the other second ventilation dust collection device 8 in the ventilation dust collection means 6 in the standby state is controlled at a constant speed or The negative pressure is maintained by performing the inverter control so that the negative pressure in the negative pressure construction section 4 is returned to the negative pressure range value as the negative pressure setting value (step S70). Subsequently, the detection signal of the atmospheric pressure sensor unit 23 is monitored, and based on the program 17 of the ROM 19, it is determined whether or not the pressure has been returned to the negative pressure range value as the negative pressure setting value (step S80). If this determination does not return to the negative pressure range value as the negative pressure set value, an alarm by the alarm lamp 27 and the alarm buzzer 28 of the main alarm device 26 is notified, and the negative pressure may deviate from the negative pressure range value. Inform in advance that there is a risk of occurrence (step S90). Thereafter, when it is determined by the timer function that a certain time has elapsed (step S100). The first ventilation dust collector 7 and the second ventilation dust collector 8 are stopped (step S110). As a result, the asbestos removal operation in the negative pressure construction section 4 is stopped, and the cause of the occurrence of the negative pressure deviating from the negative pressure value and the subsequent maintenance are performed.

次に、負圧監視制御処理の他の例について図８に基づいて工程（ステップ）順に説明する。ここでの処理は、ステップＳ１からステップＳ７０までは上記と同様であるため同一符号を付けて、その説明は省略している。
すなわち、負圧範囲値の上限値（−１５Ｐａ）を超え、さらに真空に近づくように過剰な負圧化が進行する状態で、その負圧範囲値の上限値（−１５Ｐａ）から外れたときの気圧センサ部２３からの検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧（差圧）が負圧設定値としての負圧範囲値から外れたか否かを判定する（ステップＳ２００）。この負圧過剰の発生があった場合に、第１の換気集塵装置７、第２の換気集塵装置８の何れか一方若しくは両方の風量を減少させるようにインバータ制御を実行し、負圧施工区画４内の負圧を負圧設定値としての負圧範囲値まで復帰させるようにして負圧を維持する（ステップＳ２１０）。続いて、気圧センサ部２３の検出信号を監視し、ＲＯＭ１９のプログラム１７に基づいて、負圧設定値としての負圧範囲値に復帰された否かを判定する（ステップＳ２２０）。この判定により負圧設定値としての負圧範囲値に復帰しなかった場合に、主警報装置２６の警報ランプ２７、警報ブザー２８による警報が報知され、負圧過剰が発生するおそれがあることを事前に知らせる（ステップＳ２３０）。その後、タイマー機能によって一定時間が経過したと判断されると（ステップＳ２４０）。第１の換気集塵装置７と第２の換気集塵装置８が停止される（ステップＳ２５０）。これによって負圧施工区画４でのアスベスト除去作業を中止し、負圧過剰が生じた原因の調査や、その後のメンテナンスを行うこととなる。この例によれば、過剰な負圧化を防止することができ、これによって養生された負圧施工区画４の構造損傷（養生シート３の破れなど）も防止できることとなる。 Next, another example of the negative pressure monitoring control process will be described in the order of steps (steps) based on FIG. Since the processing here is the same as that described above from step S1 to step S70, the same reference numerals are given and description thereof is omitted.
That is, when the negative pressure range value exceeds the upper limit value (−15 Pa) and the negative pressure range value deviates from the upper limit value (−15 Pa) in a state where excessive negative pressure is advanced to approach the vacuum. The detection signal from the atmospheric pressure sensor unit 23 is monitored, and based on the program 17 of the ROM 19, it is determined whether or not the negative pressure (differential pressure) has deviated from the negative pressure range value as the negative pressure set value (step S200). When this negative pressure excess occurs, inverter control is executed so as to reduce the air volume of one or both of the first ventilation dust collector 7 and the second ventilation dust collector 8, and the negative pressure The negative pressure is maintained by returning the negative pressure in the construction section 4 to the negative pressure range value as the negative pressure setting value (step S210). Subsequently, the detection signal of the atmospheric pressure sensor unit 23 is monitored, and based on the program 17 of the ROM 19, it is determined whether or not the negative pressure range value as the negative pressure set value has been returned (step S220). If this determination does not return to the negative pressure range value as the negative pressure set value, an alarm by the alarm lamp 27 and the alarm buzzer 28 of the main alarm device 26 is notified, and there is a possibility that excessive negative pressure may occur. Inform in advance (step S230). Thereafter, when it is determined by the timer function that a certain time has elapsed (step S240). The first ventilation dust collector 7 and the second ventilation dust collector 8 are stopped (step S250). As a result, the asbestos removal work in the negative pressure construction section 4 is stopped, and the cause of the excessive negative pressure is generated and the subsequent maintenance is performed. According to this example, excessive negative pressure can be prevented, and thereby structural damage (such as tearing of the curing sheet 3) of the cured negative pressure construction section 4 can be prevented.

次に、負圧監視制御処理の他の例について図９に基づいて工程（ステップ）順に説明する。ここでの処理は、ステップＳ１からステップＳ７０までは上記と同様であるため同一符号を付けて、その説明は省略している。
すなわち、第２の換気集塵装置８の作動（ステップＳ７０）が実行された後、タイマー機能によって一定時間が経過した場合（ステップＳ３００）。その負圧範囲値が下限値より大きいか否か判断される（ステップＳ３１０）。この負圧が下限値より小さい、すなわち負圧範囲値に復帰しなかった場合に、主警報装置２６の警報ランプ２７、警報ブザー２８による警報が報知され、負圧過剰が発生するおそれがあることを事前に知らせる（ステップＳ３２０）。その後、タイマー機能によって一定時間が経過したと判断されると（ステップＳ３３０）。第１の換気集塵装置７と第２の換気集塵装置８が停止される（ステップＳ３４０）。これによって負圧施工区画４でのアスベスト除去作業を中止し、負圧過剰が生じた原因の調査や、その後のメンテナンスを行うこととなる。 Next, another example of the negative pressure monitoring control process will be described in the order of steps (steps) based on FIG. Since the processing here is the same as that described above from step S1 to step S70, the same reference numerals are given and description thereof is omitted.
That is, after the operation of the second ventilation dust collector 8 (step S70) is executed, a predetermined time has elapsed due to the timer function (step S300). It is determined whether the negative pressure range value is larger than the lower limit value (step S310). When this negative pressure is smaller than the lower limit value, that is, when the negative pressure does not return to the negative pressure range value, an alarm by the alarm lamp 27 and the alarm buzzer 28 of the main alarm device 26 is notified, and there is a possibility that an excessive negative pressure may occur. Is notified in advance (step S320). Thereafter, when it is determined by the timer function that a certain time has elapsed (step S330). The first ventilation dust collector 7 and the second ventilation dust collector 8 are stopped (step S340). As a result, the asbestos removal work in the negative pressure construction section 4 is stopped, and the cause of the excessive negative pressure is generated and the subsequent maintenance is performed.

また、ステップＳ３００で一定時間が経過していない場合は、ステップＳ３５０へ進む。このステップＳ３５０で負圧範囲値の下限値より負圧が大きい場合はステップＳ３６０へ進み、このステップＳ３６０で負圧範囲値の上限値より負圧が大きいと判断されると、第２の換気集塵装置８を停止する（ステップＳ３７０）。また、ステップＳ３５０で負圧範囲値の下限値より負圧が大きいと判断されるとステップＳ６０へ戻り、また、ステップＳ３６０で負圧範囲値の上限値より負圧が小さいと判断されると、ステップＳ６０へ戻ることとなる。 If the predetermined time has not elapsed in step S300, the process proceeds to step S350. If the negative pressure is greater than the lower limit value of the negative pressure range value in step S350, the process proceeds to step S360. If it is determined in step S360 that the negative pressure is greater than the upper limit value of the negative pressure range value, the second ventilation collection is performed. The dust device 8 is stopped (step S370). If it is determined in step S350 that the negative pressure is larger than the lower limit value of the negative pressure range value, the process returns to step S60. If it is determined in step S360 that the negative pressure is lower than the upper limit value of the negative pressure range value, The process returns to step S60.

また、ステップＳ５０で第１の換気集塵装置７が作動されると、その運転時間又は作動停止操作がされたか否かの判断を行う（ステップＳ３８０）。このステップＳ３８０でＹＥＳの場合には、ステップＳ３９０へ進み、第１の換気集塵装置７のみ作動されているか否かの判断を行う。そして、第１の換気集塵装置７が作動されていればステップＳ４００へ進んで、第１の換気集塵装置７を停止して終了する。また、Ｓ３８０でＮＯの場合には、ステップＳ６０に戻る。また、ステップＳ３９０でＮＯの場合には、第１の換気集塵装置７、第２の換気集塵装置８の作動の停止を実行するステップＳ４１０へ進んで終了する。 Moreover, when the 1st ventilation dust collector 7 is act | operated by step S50, it will be judged whether the operation time or the operation stop operation was performed (step S380). In the case of YES in step S380, the process proceeds to step S390, and it is determined whether or not only the first ventilation dust collector 7 is operated. And if the 1st ventilation dust collector 7 is act | operated, it will progress to step S400, will stop the 1st ventilation dust collector 7, and will be complete | finished. If NO in S380, the process returns to step S60. Further, in the case of NO in step S390, the process proceeds to step S410 where the operation of the first ventilation dust collector 7 and the second ventilation dust collector 8 is stopped and the process ends.

また、本例による負圧の変化状態の制御例について、図１０の負圧変化グラフに基づいて説明する。図１０の横軸（時間）におけるＴ１からＴ２までの範囲は、アスベスト除去作業前の負圧施工区画４内の気圧（大気圧）を、制御装置１５による定速制御若しくはインバーター制御によって換気集塵作動される第１の換気集塵装置７により、ノミナル値で示す負圧設定値における「−４Ｐａから−１５Ｐａ」の負圧範囲値内に維持される状態を表している。
また、Ｔ２からＴ３までの範囲は、負圧施工区画４内の気圧が負圧範囲値における下限値（−４Ｐａ）から減少する方向で、外部の気圧としての正圧側に近づくように、第１の換気集塵装置７の故障による換気集塵における風量低下、負圧施工区画４の内部と外部とが気流連通状態となった際の前室５からの外部空気の流入、養生シート３の破れなどによって、変化して外れた状態となった際、制御装置１５による定速制御若しくはインバーター制御によって第２の換気集塵装置８を換気集塵作動させ、負圧施工区画４内の気圧を負圧設定値における負圧範囲値内まで復帰させる状態を表している。
また、Ｔ４からＴ５までの範囲は、負圧設定値における上限値（−１５Ｐａ）を超え、さらに真空側に近づくように過剰な負圧化が進行する状態で、第１の換気集塵装置７、第２の換気集塵装置８の何れか一方若しくは両方の風量を減少させるようにインバータ制御を実行し、負圧施工区画４内の負圧を負圧設定値としての負圧範囲値まで復帰させる状態を表している。 Further, a control example of the negative pressure change state according to this example will be described based on the negative pressure change graph of FIG. The range from T1 to T2 on the horizontal axis (time) in FIG. 10 indicates that the atmospheric pressure (atmospheric pressure) in the negative pressure construction section 4 before the asbestos removal work is collected by ventilation control by constant speed control or inverter control by the control device 15. The state which is maintained within the negative pressure range value of “−4 Pa to −15 Pa” in the negative pressure set value indicated by the nominal value by the operated first ventilation dust collector 7 is shown.
Further, the range from T2 to T3 is such that the atmospheric pressure in the negative pressure construction section 4 decreases from the lower limit value (−4 Pa) in the negative pressure range value, and approaches the positive pressure side as the external atmospheric pressure. Of air flow in ventilation and dust collection due to failure of the ventilation and dust collection device 7 in the air, inflow of external air from the front chamber 5 when the inside and outside of the negative pressure construction section 4 are in airflow communication, and the curing sheet 3 is torn For example, the second ventilation dust collector 8 is ventilated and dust-collected by constant speed control or inverter control by the control device 15 to change the pressure in the negative pressure construction section 4 to negative pressure. The state which returns to the negative pressure range value in a pressure setting value is represented.
Further, the range from T4 to T5 exceeds the upper limit value (−15 Pa) in the negative pressure set value, and the first ventilation dust collector 7 is in a state where excessive negative pressure is advanced so as to approach the vacuum side. The inverter control is executed so as to reduce the air volume of one or both of the second ventilation dust collector 8, and the negative pressure in the negative pressure construction section 4 is returned to the negative pressure range value as the negative pressure set value. The state to be made is expressed.

また、第１の換気集塵装置７、第２の換気集塵装置８は同時に、定速制御若しくはインバーター制御の組合せで換気集塵作動させることができ、これによって負圧施工区画４内の負圧を負圧設定値まで復帰させるようにして負圧を維持することができる。また、インバーター制御による負圧の維持は、例えば第１の換気集塵装置７（又は第２の換気集塵装置８）であれば、当該第１の換気集塵装置７による風量を増減させて負圧（差圧）を負圧設定値内に復帰させるように、換気モータ１１の回転数を可変させることができる。また、警報機能についても主警報装置２６による警報に限定されず、負圧センサ２９が備える警報機能との組合せ、例えば両者を同時に機能させるか、何れか一方を機能させることもできる。 Further, the first ventilation dust collector 7 and the second ventilation dust collector 8 can be operated at the same time by a combination of constant speed control or inverter control, whereby a negative dust in the negative pressure construction section 4 can be operated. The negative pressure can be maintained by returning the pressure to the negative pressure set value. In addition, for example, in the case of the first ventilation dust collector 7 (or the second ventilation dust collector 8), the maintenance of the negative pressure by the inverter control is performed by increasing or decreasing the air volume by the first ventilation dust collector 7. The rotation speed of the ventilation motor 11 can be varied so that the negative pressure (differential pressure) is returned to the negative pressure set value. Further, the alarm function is not limited to the alarm by the main alarm device 26, and a combination with the alarm function provided in the negative pressure sensor 29, for example, both of them can be functioned simultaneously, or either one can be functioned.

このように、制御装置１５によって第１の換気集塵装置７が換気集塵作動制御されることにより、気圧センサ部２３によって設定された所定の負圧（−４Ｐａから−１５Ｐａの間の任意の値の負圧値や、負圧範囲値の上下限値）に維持される。また、気圧センサ部２３における差圧センサ２４と負圧センサ２９による負圧が負圧設定値から外れた際の検出は、両者の検出信号が入力されるか、何れか一方の入力によって制御装置１５は、負圧が負圧設定値から外れたか否かを判定することもできる。また、差圧センサ２４と負圧センサ２９による負圧の検出は、電力源を共通にしていなく、独立した電力源を使用して負圧施工区画４内の負圧を検出できるため、たとえば商用電力が停電によって使用できなくなった場合でも、負圧センサ２９が負圧が負圧設定値から外れたことの検出をすることができるため、アスベスト除去作業を中止することが可能となり、安全対策上有益なものとなる。 In this way, the first ventilation dust collection device 7 is controlled by the control device 15 to perform ventilation dust collection operation, whereby a predetermined negative pressure (an arbitrary value between −4 Pa and −15 Pa set by the atmospheric pressure sensor unit 23 is set. The negative pressure value and the upper and lower limit values of the negative pressure range value are maintained. Further, when the negative pressure by the differential pressure sensor 24 and the negative pressure sensor 29 in the atmospheric pressure sensor unit 23 deviates from the negative pressure set value, either of the detection signals of the both is input, or the control device by either input 15 can also determine whether or not the negative pressure deviates from the negative pressure set value. In addition, the negative pressure detected by the differential pressure sensor 24 and the negative pressure sensor 29 is not a common power source, and the negative pressure in the negative pressure construction section 4 can be detected using an independent power source. Even when the electric power becomes unusable due to a power failure, the negative pressure sensor 29 can detect that the negative pressure has deviated from the negative pressure set value, so that the asbestos removal work can be stopped. It will be useful.

また、第１の換気集塵装置７と第２の換気集塵装置８とは並設されているため、換気集塵作動中の空気の流れは同じ方向であり、負圧施工区画４内の空気の流れによる気圧センサ部２３の検知バラツキが少なくなる。 Moreover, since the 1st ventilation dust collector 7 and the 2nd ventilation dust collector 8 are installed in parallel, the flow of the air during ventilation dust collection operation | movement is the same direction, and it is in the negative pressure construction area 4 Detection variation of the atmospheric pressure sensor unit 23 due to the air flow is reduced.

４負圧施工区画（施工区画）
６換気集塵手段
７第１の換気集塵装置
８第２の換気集塵装置
１５制御装置
２３気圧センサ部（気圧検出手段）
２４差圧センサ
２９負圧センサ 4 Negative pressure construction section (construction section)
6 Ventilation dust collection means 7 1st ventilation dust collection apparatus 8 2nd ventilation dust collection apparatus 15 Control device 23 Atmospheric pressure sensor part (atmospheric pressure detection means)
24 Differential pressure sensor 29 Negative pressure sensor

Claims

Is connected to a negative pressure construction compartment being negative pressure, sucks the air in the negative pressure construction compartment, the ventilation dust evacuating to the outside by removing the dust contained in the air, the negative pressure construction compartment Ventilation dust collection means to make the inside negative pressure,
Atmospheric pressure detection means for detecting the atmospheric pressure inside the negative pressure construction section;
A control device for controlling the operation of the ventilation dust collection means,
The atmospheric pressure detecting means includes a differential pressure sensor disposed in a partition wall that detects a differential pressure between an internal pressure of the negative pressure construction section and an external pressure, and a negative pressure directly in the negative pressure construction section. And a negative pressure sensor for detecting
The ventilation dust collection means has a first ventilation dust collector, and a second ventilation precipitator, a,
The first ventilation dust collector is used to maintain a negative pressure in the negative pressure construction section, and the second ventilation dust collector is configured so that the negative pressure in the negative pressure construction section is a negative pressure set value. It is made to stand by so that it can always operate for backup when it comes off,
The second ventilation dust collector is maintained by the first ventilation dust collector due to a decrease in air volume due to a failure of the first ventilation dust collector, an inflow of external air from the front chamber or a breakage of the curing sheet. which was the negative pressure in the negative pressure construction compartment is the negative pressure construction changed so as to approach the positive pressure side of an external air pressure of the compartment, said that out of a predetermined of the negative pressure set negative pressure construction compartment the control of based rather the control device to be detected and the negative pressure sensor for detecting directly by the said differential pressure sensor the pressure of the inner, back up the first ventilation precipitator, the negative pressure construction while maintaining pressure in the compartment to the negative pressure setting value,
The first ventilation dust collector and the second ventilation dust collector each have an air volume capable of replacing the volume of air in the negative pressure construction section at least once every 15 minutes during independent operation,
The first ventilation dust collector and the second ventilation dust collector have the ability to always maintain the negative pressure setting section independently at the negative pressure set value by the control device. Ventilation dust collection operation is possible,
In a state where the negative pressure construction section is negatively pressured by the first ventilation dust collection device, the first ventilation dust collection device during single operation follows the pressure change in the negative pressure construction section. The negative pressure monitoring dust collector is characterized in that the negative pressure set value is maintained .

The negative pressure sensor of the barometric pressure detecting means operates with a separate power source that is electrically independent from the commercial power for operating the differential pressure sensor ,
The negative pressure sensor includes wireless transmission means, and the auxiliary alarm device includes wireless reception means. When detecting a state deviating from a negative pressure set value of the negative pressure sensor, the negative pressure sensor generates an alarm signal by the wireless transmission means. 2. The negative pressure monitoring dust collecting apparatus according to claim 1, wherein the auxiliary alarm device that transmits and receives the alarm by the wireless reception unit notifies the alarm .

The second ventilation dust collecting device is in a state where the ventilation dust collection operation is performed and the atmospheric pressure in the negative pressure construction section is negative, so that the negative pressure in the negative pressure construction section approaches the vacuum side. One or both of the first ventilation dust collection device and the second ventilation dust collection device based on the fact that the pressure detection means detects that the negative pressure setting value has changed to The negative pressure monitoring dust collecting apparatus according to claim 1 or 2, wherein the negative pressure monitoring dust collecting device is controlled so as to reduce the negative pressure in the negative pressure construction section in a direction to return to the negative pressure setting value.

The negative pressure monitoring dust collector according to any one of claims 1 to 3 , wherein the ventilation dust collection of the ventilation dust collection means is performed by an exhaust fan, and the exhaust fan is controlled by an inverter. .

Claims wherein in the same direction as the flow of air in the ventilation dust collecting operation in a negative pressure construction compartment, characterized in that disposed between the first ventilation dust collector and said second ventilator precipitator Item 5. The negative pressure monitoring dust collector according to any one of Items 1 to 4 .

Based on the negative pressure of the negative pressure construction compartment is out of the negative pressure set by the pressure detecting means, an alarm according to any one of 5 claims 1, characterized in that it is informed Negative pressure monitoring dust collector.

Sucks air in the negative pressure construction compartment partitioned to be negative pressure, by evacuating to the outside by removing the dust contained in the air, the resulting negative pressure construction compartment dust A method of collecting dust without using the negative pressure in the negative pressure construction section to flow out to the outside ,
The atmospheric pressure detection means for detecting the atmospheric pressure inside the negative pressure construction section is a differential pressure sensor disposed in the partition wall section for detecting the differential pressure between the atmospheric pressure inside the negative pressure construction section and the external atmospheric pressure, A negative pressure sensor that directly detects the negative pressure in the negative pressure construction section,
The ventilation dust collection means for collecting dust generated in the negative pressure construction section is constituted by a first ventilation dust collection device and a second ventilation dust collection device,
The first ventilation precipitator and the second ventilation precipitator is provided with a flow rate that can be substituted one or more times independently with air volume of the negative pressure construction compartment during operation every 15 minutes, control device each independently always the negative pressure construction ku picture in the are possible ventilation dust collection operation have the ability to maintain a negative pressure that has been set,
A step of operating the first ventilation dust collecting device to perform a ventilation dust collecting operation to make the negative pressure construction section negative pressure;
Detecting the atmospheric pressure in the negative pressure construction section by the differential pressure sensor and the negative pressure sensor having different detection methods ;
Determining whether or not the atmospheric pressure detected by the atmospheric pressure detection means deviates from a negative pressure setting value;
When it is determined that the atmospheric pressure in the negative pressure construction section has deviated from the negative pressure setting value, the control device changes the ventilation dust collection function of the first ventilation dust collection device, and the negative pressure construction Increasing the negative pressure in a direction to return the atmospheric pressure in the compartment to the negative pressure set value, and maintaining the negative pressure construction section in the negative pressure set value;
Air pressure in the negative pressure construction section is set to negative pressure by the first ventilation dust collector due to a decrease in air volume due to failure of the first ventilation dust collector, inflow of external air from the front chamber or tearing of the curing sheet When the value cannot be maintained, the step of operating the second ventilation dust collector that was in a state where it can always operate as a backup, and
It said control changing ventilation dust collecting function by the second ventilation precipitator by the device, and the air pressure of the negative pressure construction compartment increases the negative pressure in the direction of returning to the negative pressure set, the negative pressure a step that maintain air pressure in the construction compartment to the negative pressure set,
The negative pressure monitoring dust collection method characterized by including.

The second ventilation dust collector is in a state where the ventilation dust collection operation is performed and the atmospheric pressure in the negative pressure construction section is negative,
The negative pressure of the negative pressure construction compartment is varied to approach the vacuum side, and determining whether the outside from the negative pressure set,
When it is determined that the air pressure in the negative pressure construction section has deviated from the negative pressure setting value in the direction of increasing to the vacuum side, either the first ventilation dust collector or the second ventilation dust collector Or both of the steps of reducing the negative pressure in the negative pressure construction section in a direction to return to the negative pressure set value,
The negative pressure monitoring dust collection method according to claim 7 , further comprising:

The negative pressure monitoring dust collection method according to claim 7 or 8 , wherein the negative pressure set value is a single negative pressure value.

The negative pressure monitoring dust collection method according to claim 7 or 8 , wherein the negative pressure set value is a negative pressure range value within a predetermined range.