JP2010264075A - Device and method for forming isolation chamber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dust deposited on the bottom surface of an accommodation space accommodating an infected patient from being sucked and kicked up when sucking contaminated air in the accommodation space and forming a negative pressure atmosphere. <P>SOLUTION: An air cleaning fumigator 301 (air cleaning part) installed in the accommodation space 203 of a tent 201 sucks air in the accommodation space 203 from an air intake 304, cleans it and discharges it from an exhaust port 303. The cleaned air is discharged through a first duct 402 (inside/outside exhaust structure) to the outside of the tent 201, and the accommodation space 203 is turned to negative pressure and made possible to isolate and accommodate an infected patient. At the time, a part of the cleaned air is returned to the accommodation space 203 without being discharged to the outside of the tent 201 to suppress the negative pressure formation of the accommodation space 203. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an isolation chamber forming apparatus and an isolation chamber forming method for forming an isolation chamber in a negative pressure atmosphere.

  For example, an infected patient infected with the new influenza is housed in an infectious disease bed, which is a special bed of a specialized hospital (designated medical institution for infectious diseases), and is completely isolated. When an infected patient visits a general hospital that does not have an infectious disease bed, the infected patient is transferred to a specialized hospital. Until the transfer to a specialized hospital, the infected patient is housed in a separated space (eg, a hospital room) within the hospital. However, isolation of infected patients is insufficient in hospital rooms and the like, and there is a risk of air infection to others.

  Therefore, Patent Document 1 discloses a technique for forming a negative pressure atmosphere isolation chamber (patient storage space 18 in Patent Document 1). Since the inside of the isolation room (patient storage space 18) has a negative pressure atmosphere, the contaminated air does not leak to the outside. The contaminated air in the isolation room (patient storage space 18) is purified by ozone and guided to the outside. That is, according to the technique disclosed in Patent Document 1, even in a general hospital, it is possible to easily isolate infected patients and prevent air infection.

JP-A-2005-34582

  By the way, when forming the accommodation space for accommodating a patient using a tent, the bottom face of the accommodation space becomes a waiting room in the hospital premises or an outdoor ground. In this case, it is considered that a considerable amount of dust is accumulated on the bottom surface of the accommodation space. Then, the suction of the contaminated air filled in the accommodation space proceeds, and as the negative pressure atmosphere is formed, even dust on the bottom surface of the accommodation space may be sucked. When dust is aspirated, it rises from the bottom surface of the accommodation space, so that there is a possibility that an infected patient accommodated in the accommodation space may inhale. If the infected patient sucks dust and causes coughing or the like, the infected patient's body is further weakened.

  An object of the present invention is to suppress sucking up even dust that accumulates on the bottom surface of a storage space when the contaminated air in the storage space for storing an infected patient is sucked.

  The isolation chamber forming apparatus of the present invention includes a tent having a frame and a sheet that forms a storage space for accommodating a patient separated from the outside by covering the frame, an intake port, and an exhaust port. A first ozone generator that generates ozone, a first ozonolysis catalyst that converts ozone into oxygen, and a HEPA filter that collects particulates, and sucks air from the intake port, The ozone generation point of the ozone generator 1 is passed through and mixed with ozone, and then the first ozone decomposition catalyst is passed through and the HEPA filter is passed through to clean the purified air. An air purifier that performs air suction discharged from the exhaust port, and a part of the exhaust port of the air purifier located in the accommodation space communicates with the outside of the tent, A portion of the exhaust from the exhaust port and an inner and outer exhaust structure leading to the outside of the tent.

  The isolation chamber forming apparatus of the present invention as seen from another aspect includes a frame, a tent having a seat for accommodating a patient separated from the outside by covering the frame, an intake port, and an exhaust port And a first ozone generator that generates ozone, a first ozone decomposition catalyst that converts ozone into oxygen, and a HEPA filter that collects particulates, and sucks air from the intake port, The sucked air is passed through the ozone generation portion by the first ozone generator and mixed with ozone, and then the first ozone decomposition catalyst is passed through, and the air is purified by passing through the HEPA filter. An air purifier that performs air suction for discharging purified air from the exhaust port, and the air intake and the accommodation space of the air purifier located outside the tent. An air intake structure that allows air to be freely sucked into the housing space from the air inlet, and a part of the air outlet of the air cleaning unit located outside the tent is communicated with the housing space. And an outside / inside return structure that guides part of the exhaust from the mouth to the accommodation space.

  In the isolation chamber forming method of the present invention, an intake port and an exhaust port are provided in the storage space in the tent having a frame and a seat that forms a storage space for storing a patient separated from the outside by covering the frame. A first ozone generator that generates ozone, a first ozone decomposition catalyst that converts ozone into oxygen, and a HEPA filter that collects fine particles, and sucks air from the intake port, The ozone generated by the first ozone generator is passed through and mixed with ozone, and then the first ozone decomposition catalyst is passed through, and the air is purified by passing through the HEPA filter. A step of disposing an air purifier that performs air suction to discharge the air from the exhaust port, and the air suction to the air purifier located in the accommodation space The air in the housing space is sucked from the intake port to be cleaned and discharged from the exhaust port to be returned to the housing space, and a part of the exhaust port communicates with the outside of the tent. And a step of causing the exhaust structure to guide a part of the air in the cleaned accommodation space discharged from the exhaust port to the outside of the tent.

  The isolation chamber forming method of the present invention viewed from another aspect includes an intake port and an exhaust port outside a tent having a frame and a sheet that covers the frame and forms a storage space for storing a patient separated from the outside. And a first ozone generator that generates ozone, a first ozone decomposition catalyst that converts ozone into oxygen, and a HEPA filter that collects particulates, and sucks air from the intake port, The sucked air is passed through the ozone generation portion by the first ozone generator and mixed with ozone, and then the first ozone decomposition catalyst is passed through, and the air is purified by passing through the HEPA filter. A step of arranging an air purifying unit for performing air suction for discharging the purified air from the exhaust port, and performing the air suction on the air purifying unit located outside the tent. In this way, the air in the housing space is sucked and purified from the air intake through the air intake structure that connects the air inlet of the air purifier and the housing space, and the air is discharged from the air outlet. A part of the exhaust air in the air purifying section that communicates with a part of the exhaust space that communicates with the housing space is introduced into the housing space. And a step of letting go.

  According to the present invention, a part of the air sucked from the storage space is cleaned and returned to the storage space, so that a negative pressure atmosphere is formed in the storage space compared to the case where all of the sucked air is discharged to the outside. It can suppress, and it can suppress that the dust deposited on the bottom face of the accommodation space attracts and soars.

It is a perspective view which shows the isolation chamber formation apparatus of 1st Embodiment. It is a vertical side view which shows an exhaust fan structure. It is a perspective view which shows the modification of an isolation chamber formation apparatus. It is a perspective view which shows an air purifying fumigator. It is a perspective view which shows the modification of an isolation chamber formation apparatus. It is a schematic diagram which shows the internal structure of the air cleaning fumigator and duct of 1st Embodiment. It is a perspective view which shows the internal structure of a duct. It is a perspective view which shows the internal structure of the duct as a modification. It is a flowchart which shows the flow of the process which a control part performs. It is a perspective view which shows the isolation chamber formation apparatus of 2nd Embodiment.

  A first embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an isolation chamber forming apparatus 101 according to the first embodiment. The isolation room forming apparatus 101 has a tent 201 in which an accommodation space 203 for accommodating an infected patient is formed. The installation location of the tent 201 may be indoors (for example, in hospitals) or outdoors. That is, the tent 201 is installed in an arbitrary place according to the environment and purpose. Beds, stretchers, chairs and the like (not shown) for infected patients are arranged in the accommodation space 203 in the tent 201. When an infected patient is accommodated in the tent 201, the air in the tent 201 is contaminated.

  Further, an air cleaning fumigator 301 as an air cleaning unit is installed in the accommodation space 203 in the tent 201. The air purifier fumigator 301 forms a negative pressure atmosphere isolation chamber in the accommodation space 203 by sucking the air in the tent 201 and disinfects the tent 201 by ozone fumigation. The air sucked by the air cleaning fumigator 301 is cleaned and discharged, and is guided to the outside of the tent 201 through the duct 401.

  First, the tent 201 will be described. The tent 201 includes four vertical frames 202a standing at four corners and four horizontal frames 202b connecting the upper ends of adjacent vertical frames 202a. Hereinafter, the vertical frame 202a and the horizontal frame 202b may be collectively referred to as the frame 202. An example of the material of the frame 202 is stainless steel. The frame 202 is covered with a rectangular parallelepiped sheet 204 whose lower surface is open. The material of the sheet 204 is, for example, soft vinyl chloride, and another example is Teflon (registered trademark). The sheet 204 covers the frame 202 to form an accommodation space 203 separated from the outside.

  On one surface of the sheet 204 corresponding to the side surface of the tent 201, an entrance / exit 206 for a person including an infected patient to enter and exit the tent 201 is provided. The entrance / exit 206 can be opened and closed by a fastener, for example. The lower edge 207 of the sheet 204 is a free end that is not fixed to the bottom surface 205 of the accommodation space 203. Therefore, air can pass through the gap between the lower edge 207 and the bottom surface 205. That is, the tent 201 is non-tight. The bottom surface 205 may be a hospital floor or the ground depending on the installation location of the tent 201.

  A communication space 208 that is a circular cutout portion that penetrates the sheet 204 is formed on one surface of the sheet 204 that corresponds to the side surface of the tent 201. The communication space 208 communicates the storage space 203 with the outside of the tent 201. The shape of the communication space 208 is a shape that allows insertion of a first duct 402 described later.

  The seat 204 and the frame 202 are also contaminated by the contaminated air in the tent 201. Moreover, the air purifier fumigator 301 installed in the accommodation space 203 is also contaminated by the contaminated air.

  FIG. 2 is a vertical side view showing the exhaust fan structure 501. As shown in FIG. 1, an exhaust fan structure 501 that connects the accommodation space 203 and the outside of the tent 201 is provided on one surface of the sheet 204 corresponding to the side surface of the tent 201. As shown in FIG. 4, a rotatable fan 502 and an ozone decomposition catalyst 503 as a third ozone decomposition catalyst that changes ozone into oxygen are arranged in the exhaust fan structure 501. A motor 504 serving as a drive source for the fan 502 is also incorporated in the exhaust fan structure 501. Due to the rotation of the fan 502 driven by the motor 504, the gas in the tent 201 passes through the ozone decomposition catalyst 503 and is discharged to the outside of the tent 201.

  FIG. 3 is a perspective view showing a modification of the isolation chamber forming apparatus 101. 3 differs from the isolation chamber forming apparatus 101 of FIG. 1 in the form of a tent 201. That is, the tent 201 in FIG. 1 has a rectangular shape, whereas the tent 201 in FIG. 3 has a quadrangular pyramid shape. Since the four frames 202 extend radially from the apex toward the bottom surface 205, the sheet 204 covers the frame 202, thereby forming a quadrangular pyramid-shaped accommodation space 203. The tent 201 in FIG. 3 is considered to be used more easily or urgently because the bottom surface 205 is narrower than the tent 201 in FIG.

  The shape of the tent 201 is not limited to the example shown in FIGS. 1 and 3, and any shape can be used as long as the sheet 204 covers the frame 202 to form the accommodation space 203 separated from the outside. It may be a shape.

  Next, the air purification fumigator 301 will be described. The air purification fumigator 301 is disposed on the bottom surface 205 so as to be close to the side surface of the tent 201 (the surface on which the communication space 208 is formed).

  FIG. 4 is a perspective view showing the air cleaning fumigator 301. The air cleaning fumigator 301 has a vertically long housing 302. At the four corners of the lower surface of the housing 302, casters 305 that allow the air cleaning fumigator 301 to move are provided. An intake port 304 is provided on the front surface of the housing 302, and an exhaust port 303 is provided on the top of the housing 302. The exhaust port 303 and the intake port 304 have a door shape (so-called gallery) with blades attached in parallel. Further, on the front surface of the housing 302, a display device 342 for displaying information such as the state of the air cleaning fumigator 301 and an operation device 343 for directly operating the air cleaning fumigator 301 are provided. Further, a communication unit 307 for receiving various instruction signals transmitted from the remote controller 306 (see FIG. 1) is disposed on the front surface of the housing 302. As an instruction signal, the remote controller 306 causes the air purification fumigator 301 to inhale from the air inlet 304 to instruct the formation of a negative pressure atmosphere in the tent 201, and the air purification fumigator 301 to ozone fumigation. A fumigation instruction signal for instructing execution is transmitted. When the communication unit 307 receives the instruction signal, an instruction is input to the control unit 311 (see FIG. 6) of the air purification fumigator 301, and the control unit 311 drives and controls each unit of the air purification fumigator 301. That is, the air purification fumigator 301 can be remotely controlled by the remote controller 306. At this time, it is also possible to input an instruction to the control unit 311 by operating the operation device 343.

  Returning to the description of FIG. Next, the duct 401 will be described. The duct 401 has a cover 403 that covers the upper end side of the housing 302 including the exhaust port 303. The shape of the cover 403 is a shape that exposes the communication unit 307 and the operation device 343 while covering the upper end side of the housing 302.

  The cover 403 is connected to one end of each of a first duct 402 and a second duct 404 serving as an internal / external exhaust structure that is a hollow cylindrical member. The other end of the first duct 402 is inserted into the communication space 208 of the sheet 204 and extends outside the tent 201. Thereby, the first duct 402 guides the exhaust from the exhaust port 303 to the outside of the tent 201. The other end of the second duct 404 is located in the tent 201. As a result, the second duct 404 guides the exhaust from the exhaust port 303 to the accommodation space 203 in the tent 201.

  FIG. 5 is a perspective view showing a modification of the isolation chamber forming apparatus 101. The isolation chamber forming apparatus 101 in FIG. 5 differs from the isolation chamber forming apparatus 101 in FIG. 1 in the form of the communication space 208 in the sheet 204 and the shape of the first duct 402. In the isolation chamber forming apparatus 101 of FIG. 5, the communication space 208 appears by lifting the lower edge 207 of the sheet 204 instead of the notch formed in advance in the sheet 204. The first duct 402 extending from the cover 403 is bent to reach the bottom surface 205, and then extends over the tent 201 by lifting the lower edge 207 of the sheet 204 across the bottom surface 205. That is, the first duct 402 lifts the lower edge 207 of the sheet 204, so that the communication space 208 is formed.

  FIG. 6 is a schematic diagram showing the internal structure of the air cleaning fumigator 301 and the duct 401. First, the air cleaning fumigator 301 will be described.

  The air purifying fumigator 301 incorporates an air purifying unit 308 for purifying the air in the tent 201 and a fumigating unit 309 for ejecting ozone into the tent 201 and fumigating the housing 302. However, the air cleaning unit 308 and a part of the fumigation unit 309 are integrated, and functional parts are shared.

  The air purification fumigator 301 includes a control unit 311 that drives and controls each unit. In addition to the communication unit 307, the display device 342, and the operation device 343, the control unit 311 is connected to a dust sensor 341 that senses the degree of air contamination, and a motor 312 that is a drive source of a fan 329 described later. .

  An actuator 313 provided in the duct 401 is connected to the control unit 311. The actuator 313 is a drive source for a switching valve 405 described later. More specifically, a connector 381 is connected to the control unit 311, a connector 382 is connected to the actuator 313, and the connector 382 is inserted into the connector 381, whereby the actuator 313 is connected to the control unit 311.

  The controller 311 is connected to a negative ion generator 330 that generates negative ions, and a fluorescent lamp 323 is also connected via a lighting circuit (not shown).

  Although the connection state is not shown in the control unit 311, a cleaning ozone generator 322 a as a first ozone generator that generates ozone by using creeping discharge or the like, and fumigation ozone as a second ozone generator The generator 322b is connected, and further, a cleaning air pump 334a and a fumigation air pump 334b for sending out air are connected.

  The cleaning air pump 334a is disposed at the air inlet 304 and is connected to the cleaning ozone generator 322a through a hollow tube 335a. A cleaning ejection nozzle 333a for ejecting gas is connected to the cleaning ozone generator 322a via another tube 335a. The cleaning jet nozzle 333a is disposed in a wind tunnel 310 to be described later. When the cleaning air pump 334a sends air toward the cleaning ozone generator 322a, the cleaning ozone generator 322a generates ozone, and the generated ozone is ejected from the cleaning ejection nozzle 333a.

  The fumigation air pump 334b is disposed at the air inlet 304 and is connected to the fumigation ozone generator 322b via a hollow tube 335b. The fumigation ozone generator 322b is connected to a fumigation ejection nozzle 333b for ejecting gas via another tube 335b. The fumigation jet nozzle 333 b is disposed at the exhaust port 303. When the fumigation air pump 334b sends air toward the fumigation ozone generator 322b, the fumigation ozone generator 322b generates ozone, and the generated ozone is ejected from the fumigation ejection nozzle 333b.

  A hollow wind tunnel 310 is disposed in the housing 302 of the air cleaning fumigator 301. One end of the wind tunnel 310 is located at the intake port 304 and the other end is located at the exhaust port 303. Inside the wind tunnel 310, in order from the inlet 304 side to the exhaust outlet 303, a pre-filter 321 that collects large dust and dirt, a cleaning nozzle 333a that jets ozone, a fluorescent lamp 323 that emits light, A photocatalyst 324 that irradiates a fluorescent lamp 323 to perform sterilization and deodorization, a first ozone decomposition catalyst that changes ozone into oxygen, an ozone decomposition catalyst 325 as a second ozone decomposition catalyst, and malodorous substances (for example, ammonia, acetic acid, A high-performance deodorizing filter 326 that collects methyl mercaptan), carbon silk 327 that deodorizes, a HEPA filter 328 that collects particles such as viruses, a fan 329 that rotates by driving the motor 312, and a negative ion generator 330. ing. Note that the photocatalyst 324 and the ozone decomposition catalyst 325 are both carried on various carriers (not shown).

  Next, the duct 401 will be described. As shown in FIG. 6, the cover 403 attached to the housing 302 forms a space (hereinafter referred to as a cover space 403 a) above the exhaust port 303. The front ends of the first duct 402 and the second duct 404 are disposed above the exhaust port 303 via the cover space 403a. More specifically, the tip of the first duct 402 is positioned above the end surface 310 a of the wind tunnel 310. The tip of the second duct 404 is positioned above the fumigation ejection nozzle 333b (ejection nozzle 333). The gas discharged from the exhaust port 303 is temporarily accommodated in the cover space 403a. Thereafter, the gas accommodated in the cover space 403 a is introduced into the first duct 402 or the second duct 404.

  FIG. 7 is a perspective view showing the internal structure of the duct 401. The duct 401 includes a plate-like switching valve 405 that rotates around the rotation shaft 405 a in a state in contact with the end face of the first duct 402. The switching valve 405 is formed with an opening 406 that is a hole penetrating the switching valve 405. The first duct 402 is closed when the end surface is in contact with the switching valve 405. However, the first valve 402 is opened by positioning the opening 406 at the end face of the first duct 402 by the switching valve 405 rotating about the rotation shaft 405a. The rotating shaft 405 a is a power transmission mechanism that is connected to the actuator 313 and transmits the power of the actuator 313 to the switching valve 405.

  In FIG. 7, the switching valve 405 is positioned at a rotational position that closes the first duct 402. At this time, since only the second duct 404 is open, the gas exhausted from the exhaust port 303 and accommodated in the cover space 403a passes through the second path 404a formed inside the second duct 404, and thus the tent 201. It is led to the storage space 203 inside.

  Here, the control unit 311 rotates the actuator 313 by a specified rotation angle. The rotating shaft 405a transmits the rotational force of the actuator 313 to the switching valve 405, and the switching valve 405 rotates by a specified angle. Thereby, the switching valve 405 is positioned at a position where the opening 406 is positioned at the end face of the first duct 402 and the first duct 402 is opened. At this time, since not only the second duct 404 but also the first duct 402 is opened, the gas discharged from the exhaust port 303 and stored in the storage space 203 is formed inside the second duct 404. In addition to being guided into the tent 201 through the path 404a, it is also guided out of the tent 201 through the first path 402a. From this state, the control unit 311 further reversely drives the actuator 313 by a specified angle and the switching valve 405 rotates reversely by the specified angle, so that the opening 406 deviates from the end face of the first duct 402, and the first duct 402 It is blocked by the switching valve 405 and only the second duct 404 is opened.

  FIG. 8 is a perspective view showing an internal structure of a duct 401 as a modified example. The duct 401 in FIG. 8 is provided with an openable / closable lid 407 at a part of a cover 403 (indicated by a broken line in FIG. 8). A hand can be introduced into the cover 403 by opening the opening / closing lid 407. Then, the switching valve 405 can be grasped with the hand introduced into the cover 403 and rotated about the rotating shaft 405a. Thus, the switching valve 405 is manually closed regardless of the driving of the actuator 313, and the position where the first duct 402 is closed, and the position where the first duct 402 is opened (the position where the opening 406 is positioned on the end face of the first duct 402). Can be positioned.

  In such a configuration, the rescue worker first places the air cleaning fumigator 301 in the tent 201 from the entrance / exit 206. Next, the duct 401 is inserted into the tent 201 through the entrance / exit 206, and the cover 403 of the duct 401 is put on the housing 302 of the air cleaning fumigator 301. Accordingly, one end of the first duct 402 and the second duct 404 is positioned at the exhaust port 303. Then, the other end of the first duct 402 is inserted into the communication space 208. Thereafter, the rescue worker accommodates the infected patient in the accommodation space 203 in the tent 201 and leaves the tent 201, and operates the remote controller 306 to transmit a negative pressure instruction signal. The communication unit 307 receives the transmitted negative pressure instruction signal.

  FIG. 9 is a flowchart showing a flow of processing executed by the control unit 311. The control unit 311 determines the instruction signal received by the communication unit 307 (step S101, step S110). When it is determined that the instruction signal received by the communication unit 307 is a negative pressure instruction signal (Y in step S101), the actuator 313 is driven to position the switching valve 405 at the rotational position where the first duct 402 is opened. (Step S102), "air suction" processing is executed (Step S103).

  In step S <b> 103, first, the control unit 311 rotates the fan 329 by driving the motor 312. By the rotation of the fan 329, the contaminated air in the tent 201 is sucked from the air inlet 304, passes through the wind tunnel 310, is discharged from the air outlet 303, and is accommodated in the cover space 403a. A part of the air accommodated in the cover space 403a is returned to the tent 201 through the second duct 404. At the same time, another part of the air accommodated in the cover space 403a is guided out of the tent 201 through the opened first duct 402. In this way, a part of the sucked air in the tent 201 is discharged outside the tent 201, so that the negative pressure inside the tent 201 is lower than that outside the tent 201. Due to the negative pressure atmosphere in the tent 201, the contaminated air in the tent 201 is prevented from leaking out of the tent 201, for example, from a gap between the lower edge 207 and the bottom surface 205 of the sheet 204. Is done.

  By the way, when the installation place of the tent 201 is not a clean room in which air cleanliness is ensured but a waiting room in a hospital, it is assumed that a considerable amount of dust is accumulated on the bottom surface 205. When the tent 201 is installed outdoors, the bottom surface 205 is considered to contain not only dust but also earth and sand. In these cases, as the air in the tent 201 becomes thinner, the suction force from the air inlet 304 increases, and finally the air inlet 304 sucks in dust and soil on the bottom surface 205. It is thought that soaring will occur.

  However, in the present embodiment, a part of the air in the tent 201 sucked from the air inlet 304 is returned to the tent 201 again after the negative pressure atmosphere in the accommodation space 203 is formed as described above. Therefore, even if the suction of air proceeds from the air inlet 304, the formation of a negative pressure atmosphere in the accommodation space 203 is suppressed as compared with the case where all of the sucked air is discharged outside the tent 201. In this way, it is possible to suppress the dust and dirt on the bottom surface 205 from being sucked up from the intake port 304 and flying up.

  At this time, the control unit 311 drives the cleaning ozone generator 322a and the cleaning air pump 334a. Therefore, ozone is released into the wind tunnel 310 from the cleaning nozzle 333a. Contaminated air sucked from the air inlet 304 passes through the pre-filter 321 to remove large dust, is mixed with ozone to be sterilized and deodorized, passes through the photocatalyst 324, is sterilized and deodorized, and passes through the ozone decomposition catalyst 325. Ozone that has been passed and mixed is returned to oxygen, passed through the high-performance deodorizing filter 326 to remove malodorous substances, passed through the carbon silk 327, deodorized, and airborne bacteria remaining after passing through the HEPA filter 328 And dust is removed and it exhausts from the exhaust port 303 as clean air. Negative ions generated by the negative ion generator 330 by the control unit 311 of the control unit 311 are mixed with the clean air. That is, the contaminated air in the tent 201 is released into the atmosphere in a clean and safe state. Note that the control unit 311 adjusts the amount of rotation (air volume) of the fan 329 according to the degree of air contamination sensed by the dust sensor 341.

  After the infected patient leaves the tent 201, the rescuer operates the remote controller 306 to transmit a fumigation instruction signal. The communication unit 307 receives the fumigation instruction signal. When it is determined that the instruction signal received by the communication unit 307 is a fumigation instruction signal (N in step S101, Y in step S110), the control unit 311 first performs a pre-fumigation process (step S111). In general, the pre-fumigation process is performed by driving the actuator 313 to position the switching valve 405 at the rotational position where the first duct 402 is opened and driving the motor 312 as in steps S102 and S103. 329 is a process of rotating 329. In the pre-fumigation process, the control unit 311 drives the cleaning ozone generator 322a and the like. By such pre-fumigation treatment, the contaminated air in the accommodation space 203 is cleaned and discharged from the exhaust port 303. The pre-fumigation process is executed for a predetermined time or until the degree of air contamination sensed by the dust sensor 341 reaches a predetermined value. The significance of this fumigation pretreatment will be described later.

  After the pre-fumigation process, the control unit 311 drives the actuator 313 to position the switching valve 405 at a rotation position that closes the first duct 402 (step S112). Then, the process of “ozone release” is executed (step S113). In “ozone release” in step S113, the fumigation air pump 334b is driven, and the fumigation ozone generator 322b is driven. Thus, ozone is ejected from the fumigation ejection nozzle 333b, is exhausted from the exhaust port 303, and is accommodated in the cover space 403a. The ozone stored in the cover space 403a is guided into the tent 201 through the second duct 404, and ozone fumigation is performed in the tent 201. At this time, since the first duct 402 is closed, the ozone accommodated in the cover space 403a is not discharged outside the tent 201 through the first duct 402. By such ozone fumigation in the tent 201, the air cleaning fumigator 301, the tent 201, the bed mat (not shown), etc., which have been contaminated by the contaminated air in the tent 201, are sterilized.

  Note that ozone may leak from the non-airtight tent 201. Therefore, the exhaust fan structure 501 is driven at the time of “ozone release” in step S113. By the exhaust fan structure 501, the ozone in the tent 201 is discharged out of the tent 201 while being returned to oxygen by the ozone decomposition catalyst 503, and the inside of the tent 201 is in a negative pressure atmosphere. At this time, it is considered that the exhausted fan structure 501 causes the contaminated air that has not been sufficiently sterilized by ozone to be discharged outside the tent 201. However, in this embodiment, pre-fumigation treatment is performed before ozone release. Therefore, the air in the storage space 203 is cleaned, and the exhaust fan structure 501 prevents the contaminated air from being discharged out of the tent 201.

  However, the motor 312 that drives the fan 329 can be rotated at a low speed by the control unit 311, and the motor 312 is rotated at a low speed during “ozone release” to weaken the air suction force by the fan 329. If so, the exhaust fan structure 501 can be omitted.

  When the control unit 311 determines that a certain period of time has elapsed from the reception determination of the fumigation instruction signal (Y in step S114), the control unit 311 stops the ozone generation by the fumigation ozone generator 322b (step S115), and drives the actuator 313. The switching valve 405 is positioned at the rotational position where the first duct 402 is opened (step S116). Then, the process of “ozone recovery” is executed (step S117). In “ozone recovery” in step S117, the motor 312 is driven to rotate the fan 329. Thereby, ozone in the tent 201 used for fumigation is sucked from the air inlet 304 and passes through the wind tunnel 310. At this time, ozone passes through the ozonolysis catalyst 325 and is returned to oxygen. The oxygen is exhausted from the exhaust port 303 and is guided out of the tent 201 through the open first path 402a.

  Although the inside of the tent 201 during ozone fumigation is dangerous because toxic ozone is filled, the ozone filled in the tent 201 is returned to oxygen and released into the atmosphere in a safe state. Therefore, after ozone fumigation, it is possible to enter the tent 201 with confidence.

  When it is determined that the instruction signal received by the communication unit 307 is neither a negative pressure instruction signal nor a fumigation instruction signal (N in Step S101, N in Step S110), the control unit 311 executes other processing (Step S101). S121).

  When the duct 401 of FIG. 8 is installed, since the control unit 311 does not drive the actuator 313, the infected patient manually rotates the switching valve 405 to open the switching valve 405 and the first duct 402. And a rotational position where the first duct 402 is closed.

  Next, a second embodiment will be described based on FIG.

  FIG. 10 is a perspective view showing an isolation chamber forming apparatus 101 according to the second embodiment. The same parts as those described with reference to FIGS. 1 to 9 are denoted by the same reference numerals, and description thereof is also omitted. The second embodiment is different from the first embodiment in the installation position of the air cleaning fumigator 301. That is, in the isolation chamber forming apparatus 101 of the first embodiment, the air cleaning fumigator 301 is installed in the accommodation space 203 in the tent 201, whereas in the isolation chamber forming apparatus 101 of the second embodiment, The air cleaning fumigator 301 is installed outside the tent 201.

  A cutout having a shape smaller than the outer shape of the air inlet 304 is formed on one surface of the sheet 204. An air-permeable mesh portion 209 as an intake structure is provided so as to close the notch. The rescue worker positions the air purifier fumigator 301 at a position where the air inlet 304 is in close contact with the mesh portion 209 and fits in the outer shape of the mesh portion 209. Thereby, the mesh part 209 communicates the inlet 304 and the accommodation space 203. In this state, when the fan 329 rotates, the air in the accommodation space 203 is sucked from the intake port 304. When the air is sucked from the air inlet 304, the mesh portion 209 is attracted to the air inlet 304, and the peripheral portion of the mesh portion 209 in the seat 204 is also attracted to the air inlet 304. Thus, the contaminated air in the tent 201 is prevented from leaking from the mesh portion 209 to the outside of the tent 201 during intake from the intake port 304.

  Next, the rescue worker puts the cover 403 on the housing 302 of the air cleaning fumigator 301 installed outside the tent 201. Thereafter, in the second embodiment, the rescue worker inserts the second duct 404 as the outer / inner return structure into the communication space 208 from the outside of the tent 201 toward the accommodation space 203. Thereby, the contaminated air sucked from the air inlet 304 through the mesh portion 209 is exhausted from the air outlet 303 after being purified, and is guided to the accommodation space 203 by the second duct 404. Further, the ozone released from the exhaust port 303 is also guided to the accommodation space 203 by the second duct 404.

  In such a configuration, also in the second embodiment, the control unit 311 performs the same processing (see the flowchart of FIG. 9) as in the first embodiment. At this time, in the second embodiment, since the air purification fumigator 301 is disposed outside the tent 201, it is not necessary to use the remote controller 306. An instruction signal can be input to the control unit 311 by directly operating the operation device 343. When it is determined that the instruction signal input from the operation device 343 is a negative pressure instruction signal (Y in Step S101), the control unit 311 drives the actuator 313 to switch the switching valve 405 and the first duct 402. It is positioned at the rotational position to be released (step S102), and the “air suction” process is executed (step S103). That is, in step S103, the fan 329 is rotated by driving the motor 312. Due to the rotation of the fan 329, the contaminated air in the tent 201 is sucked from the air inlet 304 through the mesh portion 209, passes through the wind tunnel 310, and is discharged from the air outlet 303. A part of the air discharged from the exhaust port 303 is guided to the outside of the tent 201 through the first duct 402, and another part of the air discharged from the exhaust port 303 passes through the second duct 404 to the tent. It is also guided in 201. Since the exhaust from the exhaust port 303 is guided to the outside of the tent 201, the inside of the tent 201 has a negative pressure. At this time, a part of the air in the tent 201 sucked from the air inlet 304 is returned to the tent 201. Therefore, even if air suction from the air inlet 304 proceeds, all of the sucked air is discharged outside the tent 201. Compared with the case where it does, formation of the negative pressure atmosphere in the accommodation space 203 will be suppressed. In this way, it is possible to suppress dust and dirt on the bottom surface 205 from being sucked up from the intake port 304 and flying up.

  When the control unit 311 determines that the instruction signal input from the operation device 343 is a fumigation instruction signal (N in step S101, Y in step S110), and the instruction input from the operation device 343 The processing when it is determined that the signal is neither a negative pressure instruction signal nor a fumigation instruction signal (N in step S101, N in step S110) is the same as the processing described based on the flowchart of FIG. Description of these processes is omitted.

  As described above, it is possible to suppress dust and soil that have accumulated on the bottom surface 205 of the accommodation space 203 from being sucked from the intake port 304 and soaring. For this reason, it is possible to prevent adverse effects such as causing the infected patient accommodated in the accommodation space 203 to suck dust and causing the infected patient to cough.

  Further, after the infected patient leaves the tent 201, ozone fumigation in the tent 201 is performed, and the air purifier fumigator 301, the tent 201, and the bed mat (not shown) that have been contaminated by the contaminated air in the tent 201. Etc. are disinfected. Therefore, the sheet 204 or the like can be used repeatedly without being incinerated, and the air cleaning fumigator 301 can be used again even if it is installed in the tent 201. At this time, it is not necessary to separately prepare and install equipment for ozone fumigation.

  Further, when the air cleaning fumigation machine 301 is installed in the tent 201, the air cleaning fumigation machine 301 does not become an obstacle when the rescuer moves outside the tent 201, and the work when the infected patient is rescued. It can also be expected to improve the performance.

  In addition, since the air cleaning unit 308 and the fumigation unit 309 are integrated in the housing 302, the air cleaning unit 308 and the fumigation unit 309 are more convenient for installation and transportation than when the air cleaning unit 308 and the fumigation unit 309 are separate. Increase.

DESCRIPTION OF SYMBOLS 101 ... Isolation chamber formation apparatus 201 ... Tent 202 ... Frame 203 ... Accommodating space 204 ... Sheet 209 ... Mesh part (intake structure)
DESCRIPTION OF SYMBOLS 303 ... Exhaust port 304 ... Intake port 306 ... Remote controller 307 ... Communication part 308 ... Air purifying part 309 ... Fumigation part 311 ... Control part 313 ... Actuator (drive source)
322a Cleaning ozone generator (first ozone generator)
322b ... Ozone generator for fumigation (second ozone generator)
325 ... Ozone decomposition catalyst (first ozone decomposition catalyst, second ozone decomposition catalyst)
328 ... HEPA filter 402 ... first duct (internal / external exhaust structure)
404 ... 2nd duct (outside return structure)
405 ... Switching valve 405a ... Rotating shaft (power transmission mechanism)

Claims (8)

A tent having a frame and a sheet forming a storage space for storing a patient separated from the outside by covering the frame;
An intake port and an exhaust port are provided, and includes a first ozone generator that generates ozone, a first ozone decomposition catalyst that changes ozone into oxygen, and a HEPA filter that collects particulates. , And the first ozone generator is passed through the first ozone decomposing catalyst and then passed through the HEPA filter. And an air purifying unit that performs air suction to discharge the purified air from the exhaust port,
An internal / external exhaust structure that communicates a part of the exhaust port of the air purifier located in the housing space with the outside of the tent and guides a part of the exhaust from the exhaust port to the outside of the tent;
An isolation chamber forming apparatus comprising: The air purifier is
An ozone release comprising a second ozone generator for generating ozone and a second ozone decomposition catalyst for converting ozone into oxygen, and releasing ozone generated by the second ozone generator from the exhaust port; A fumigation unit that sucks ozone from the intake port and passes through the second ozone decomposition catalyst and collects ozone that is discharged from the exhaust port, is integrally provided,
The internal and external exhaust structure is
Comprising a switching mechanism for opening and closing the inner and outer exhaust structure,
The isolation chamber forming apparatus according to claim 1.   The isolation chamber forming apparatus according to claim 2, wherein the first ozone decomposition catalyst and the second ozone decomposition catalyst are shared by the same thing. The switching mechanism is
A switching valve movable between a position for opening the inner and outer exhaust structure and a position for closing the inner and outer exhaust structure;
A power transmission mechanism that transmits the power of the drive source to the switching valve to move the position of the switching valve;
With
The air purifier is
A communication unit that receives the instruction signal transmitted by a remote controller that transmits an instruction signal including a negative pressure instruction signal that instructs formation of a negative pressure atmosphere and a fumigation instruction signal that instructs ozone fumigation;
When it is determined that the instruction signal received by the communication unit is the negative pressure instruction signal, the drive source is driven to open the inner / outer exhaust structure to the switching valve and perform the air suction, When it is determined that the instruction signal received by the communication unit is the fumigation instruction signal, the drive source is driven to block the internal / external exhaust structure with the switching valve, and then the ozone is released to the fumigation unit. A control unit for driving the drive source and allowing the switching valve to open the internal / external exhaust structure and then allowing the fumigation unit to perform the ozone recovery;
Comprising
The isolation chamber forming apparatus according to claim 2 or 3. A tent having a frame and a sheet forming a storage space for storing a patient separated from the outside by covering the frame;
An intake port and an exhaust port are provided, and includes a first ozone generator that generates ozone, a first ozone decomposition catalyst that changes ozone into oxygen, and a HEPA filter that collects particulates. , And the first ozone generator is passed through the first ozone decomposing catalyst and then passed through the HEPA filter. And an air purifying unit that performs air suction to discharge the purified air from the exhaust port,
An air intake structure that communicates the air inlet of the air purifier located outside the tent and the housing space, and allows air to be sucked into the housing space from the air inlet;
An outside / inside air return structure for communicating a part of the exhaust port of the air cleaning unit located outside the tent with the accommodation space, and guiding a part of the exhaust from the exhaust port to the accommodation space;
An isolation chamber forming apparatus comprising: The HEPA filter is
Arranged on the downstream side of the path of the air that is sucked from the intake port and discharged from the exhaust port, rather than the ozone generation location,
The isolation chamber forming device according to any one of claims 1 to 5. The accommodation space in the tent having a frame and a seat forming an accommodation space for accommodating a patient separated from the outside by covering the frame is provided with an intake port and an exhaust port, and first ozone that generates ozone A generator and a first ozonolysis catalyst that converts ozone into oxygen; and a HEPA filter that collects particulates, and sucks air from the inlet, and the sucked air is converted into ozone by the first ozone generator. Air suction that passes through the generation point and mixes with ozone, and then passes through the first ozonolysis catalyst and passes through the HEPA filter, and the purified air is discharged from the exhaust port. A step of arranging an air purifying section for performing
By allowing the air purifier located in the accommodation space to perform the air suction, the air in the accommodation space is sucked from the intake port to be cleaned and discharged from the exhaust port and returned to the accommodation space, and A step of guiding a portion of the air in the cleaned storage space discharged from the exhaust port to the outside of the tent to an internal / external exhaust structure that communicates a part of the exhaust port and the outside of the tent;
An isolation chamber forming method comprising: A first ozone generator for generating ozone by providing an intake port and an exhaust port outside a tent having a frame and a seat forming a storage space for accommodating a patient separated from the outside by covering the frame. And a first ozone decomposition catalyst that changes ozone into oxygen and a HEPA filter that collects fine particles, and sucks air from the intake port, and the sucked air is used to generate ozone by the first ozone generator. After passing through and mixing with ozone, the first ozone decomposition catalyst is passed through, and the HEPA filter is passed through for purification, and the cleaned air is discharged through the exhaust port. Arranging the air purifying section;
By allowing the air purifier located outside the tent to perform the air suction, the accommodation space is connected to the accommodation space through an intake structure that communicates the intake port of the air purification unit with the accommodation space. The air is sucked and cleaned to be discharged from the exhaust port, and at the same time, a part of the exhaust port of the air cleaning unit and the housing space are connected to the outer return air structure to be cleaned from the exhaust port. A step of guiding a part of the air in the accommodation space into the accommodation space;
An isolation chamber forming method comprising:

Images