JP2016087082A - Decontamination liquid spray device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress remaining of a decontamination liquid in a decontamination liquid supply path after completion of a decontamination step.SOLUTION: A decontamination liquid spray device comprises: a sprayer having a first port, a second port, and a nozzle opening; first piping connected to an air compressor at one end and connected to the first port at the other end; a pump for drawing up a decontamination liquid from a container storing the decontamination liquid; second piping connected to the second port at one end and connected to the pump at the other end, and receiving the flow of the decontamination liquid drawn up by the normal rotation operation of the pump; and a control device for controlling the operation of the pump. The sprayer sucks the decontamination liquid flowing through the second piping by a negative pressure generated in the second port when air taken from the first port is jetted from the nozzle opening, and mixes the decontamination liquid with the air to jet the mixture from the nozzle opening in the form of fog. When the spraying of the decontamination liquid by the sprayer is completed, the control device makes the pump perform reverse rotation operation so as to recover the decontamination liquid remaining in the second piping.SELECTED DRAWING: Figure 3C

Description

  The present invention relates to a decontamination liquid spraying apparatus.

  Isolators used for experiments related to regenerative medicine and pharmaceuticals are provided with a decontamination liquid injection device that gasifies or atomizes a decontamination liquid such as hydrogen peroxide water to sterilize the work space. (For example, Patent Document 1).

Japanese Patent No. 5539586

  In general decontamination liquid spraying apparatuses including the decontamination liquid injection apparatus of Patent Document 1, the decontamination liquid stored in the container is pumped up by a pump and supplied to the sprayer through a pipe. When spraying is completed, the decontamination liquid remains inside the decontamination liquid supply path including the pipe and the nozzle of the pump. Since the decontamination liquid is a hazardous material, it is recommended that the decontamination liquid storage container be removed from the spraying device and stored in the specified storage location after the work is completed. There is a possibility that the decontamination liquid remaining in the nozzle may drip from the nozzle and contaminate the spraying device. In addition, when the worker is performing work such as cleaning near the nozzle, there is a risk that residual liquid may drip from the nozzle and hit the worker, and when the worker is performing an inspection work inside the isolator. In addition, the decontamination liquid remaining in the pipe may be ejected for some reason, which is dangerous.

  The invention for solving the above problems includes a sprayer having a first port, a second port, and a nozzle port, a first pipe having one end connected to an air compressor and the other end connected to the first port; A pump that pumps the decontamination liquid from a container that stores the decontamination liquid, one end of which is connected to the second port and the other end is connected to the pump, and the decontamination liquid that is pumped up by forward rotation of the pump A second pipe that flows and a control device that controls the operation of the pump, and the sprayer is caused by a negative pressure generated in the second port when the air taken in from the first port is injected from the nozzle port. The decontamination liquid flowing through the second pipe is sucked, the decontamination liquid is mixed with air and sprayed from the nozzle port, and the control device finishes spraying the decontamination liquid by the sprayer. And the second pipe And wherein the reversing operation of the pump in order to recover the decontamination liquid remaining.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that a decontamination liquid remains in the supply path of a decontamination liquid after completion | finish of a decontamination process.

It is the schematic of the isolator containing the decontamination liquid spray apparatus in this Embodiment. It is a block diagram of the control apparatus in this Embodiment. It is the schematic which shows the process in which the decontamination liquid spraying apparatus decontaminates the inside of a glove box by the normal rotation driving | operation of a pump. It is the schematic which shows the process by which air is supplied to the supply path | route of a decontamination liquid in order to send out the decontamination liquid which remains inside the decontamination liquid supply path | route to a sprayer. It is the schematic which shows a mode that a decontamination liquid remains in the supply path after a pump stops. It is the schematic which shows the process of carrying out reverse rotation driving | operation of a pump and collect | recovering decontamination liquid.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings. In the following description, it is assumed that the decontamination liquid spraying apparatus in the embodiment of the present invention is incorporated in an isolator, but the decontamination liquid spraying apparatus of the present invention is used for decontamination of the internal space of an apparatus other than the isolator. May be. In this specification, killing microorganisms or bacteria to bring them closer to sterility is called decontamination, and includes sterilization, sterilization, and sterilization.

=== Configuration of Isolator ===
With reference to FIG. 1, the structure of the isolator containing the decontamination liquid spray apparatus in this embodiment is demonstrated.

  FIG. 1 is a schematic diagram showing the configuration of an isolator. The isolator 100 is a device that performs a cell operation or the like in a decontaminated environment, and includes a decontamination liquid spray device 200, a glove box 300, and a pass box 400. The isolator 100 includes an air supply device that supplies air outside the isolator 100 to the glove box 300 and the pass box 400, an exhaust device that discharges hydrogen peroxide gas, air, and the like from the glove box 300 and the pass box 400, and the like. May be included.

<Glove box>
The glove box 300 is a space for working with cells and the like, and a sprayer 211 is provided inside the glove box 300. The glove box 300 has an opening (not shown) for communicating with the pass box 400. A work object such as a cell is carried into the glove box 300 from the pass box 400 through the opening.

<Pass box>
The pass box 400 is installed on the side of the glove box 300 in order to carry cells or the like into the glove box 300 from the outside. Inside the pass box 400, a space for temporarily storing cells and the like is formed.

  The pass box 400 has a door (not shown) for carrying cells and the like from the outside. Further, the pass box 400 has an opening (not shown) on the side surface facing the glove box 300. A door (not shown) for opening and closing the opening is attached to the opening, and the glove box 300 and the pass box 400 can communicate with each other with airtightness. In the present embodiment, the sprayer 212 is also installed inside the pass box 400, but the sprayer need not be provided in both the glove box 300 and the pass box 400, and either one may be used.

<Decontamination liquid spray device>
The decontamination liquid spraying apparatus 200 is an apparatus for spraying the decontamination liquid inside the glove box 300 and the pass box 400, and includes sprayers 211 and 212, pipes 221-225, a pump 230, a control device 240, and a tank (container). 251, bottle 252, air compressor 260, and filters 291-296. The above-described components of the decontamination liquid spraying apparatus 200 control the sprayer, the air supply path for supplying air to the sprayer, the decontamination liquid supply path for supplying decontamination liquid to the sprayer, and the supply of air and decontamination liquid. Therefore, the components will be described below according to this classification.

(Nebulizer)
As described above, the sprayers 211 and 212 are provided inside the glove box 300 and the pass box 400, respectively. Since the sprayers 211 and 212 are of the same type, the sprayer 211 will be described here.
The sprayer 211 includes a first port 211A and a second port 211B. The first port 211 </ b> A and the second port 211 </ b> B each communicate with the nozzle port through a flow channel formed inside the sprayer 211. Since the diameter of the nozzle port is smaller than the diameter of the first port 211A, the air that has flowed into the sprayer 211 from the first port 211A is accelerated in the flow path inside the sprayer 211 and injected from the nozzle port. To do. Pipes 221 and 222 are connected to the first port 211A and the second port 211B of the sprayer 211, respectively.

(Air supply route)
Air (air) is supplied from the air compressor 260 to the sprayers 211 and 212 via the pipe 221. In this specification, a path from the pipe 221 to the first ports 211A and 212A of the sprayers 211 and 212 may be referred to as an air supply path.

  When the air compressor 260 receives an operation start instruction from the control device 240, the air compressor 260 takes in air from the outside and pumps it to the pipe 221.

  The pipe 221 is a conduit through which compressed air flows, and is connected to the air compressor 260 at one end. The pipe 221 branches at a branch point a on the route, and the branched pipe-side ends are connected to the first ports 211A and 212A of the sprayers 211 and 212, respectively. Thereby, the air pumped from the air compressor 260 is supplied to the first ports 211A and 212A of the sprayers 211 and 212 through the pipe 211. The pipe 221 corresponds to the first pipe.

  A filter 291 is provided on the upstream side (air compressor 260 side) of the branch point a on the path of the pipe 221. The filter 291 is an air filter that removes impurities such as dust and moisture in the air sent from the air compressor 260.

  Further, valves 281 and 282 are provided on the downstream side (sprayer 211 and 212 side) from the branch point a on the path of the pipe 221. The valves 281 and 282 are electromagnetic valves that respectively open and close the paths where the valves 281 and 282 are installed. In this embodiment, the valves 281 and 282 are controlled by the control device 240 so as to selectively supply air to the sprayers 211 and 212. Is done. However, the valves 281 and 282 may be controlled so as to supply air to both the sprayers 211 and 212.

(Decontamination solution supply route)
The decontamination liquid is supplied from the tank 251 to the sprayers 211 and 212 via the pump 230 and the pipe 222. In this specification, the path from the tank 251 to the second ports 211B and 212B of the sprayers 211 and 212 may be referred to as a decontamination liquid supply path.

  The tank 251 is a container that stores, for example, hydrogen peroxide as a decontamination solution, and is placed on the measuring instrument 272. The measuring device 272 measures the amount of the decontamination liquid pumped up from the tank 251 by the forward rotation of the pump 230, and when a predetermined amount of the decontamination liquid is pumped up from the tank 251, the pumping of the decontamination liquid is stopped. The measurement signal is output to the control device 240. For example, by setting the amount of the decontamination liquid according to the internal space of the glove box 300 or the like to be decontaminated, it is possible to prevent the decontamination liquid from being excessively sprayed, and the decontamination liquid is effective. Utilization is planned. In addition, the time required for replacing the decontamination gas supplied into the glove box 300 and the pass box 400 with the outside air can be shortened.

  The pump 230 pumps the decontamination solution from the tank 251 through the pipe (pipe portion) 225 and forwards it to the pipe 222 by forward rotation operation under the control of the control device 240. In addition, the pump 230 can perform a reverse operation so as to collect the decontamination liquid remaining in the decontamination liquid supply path. The pump 230 is, for example, a peristaltic pump.

  The pipe 222 is a pipe through which the decontamination liquid pumped up by the pump 230 flows, and is connected to the pump 230 at one end. The pipe 222 branches at a branch point b on the route, and the branched pipe ends are connected to the second ports 211B and 212B of the sprayers 211 and 212, respectively. The pipe 222 corresponds to the second pipe.

  On the path of the pipe 222, the pipe 223 is branched from a branch point c on the downstream side (sprayer 221 side) from the branch point b. The pipe 223 extends from the branch point c, and is open to the internal space of the bottle 252 at the end opposite to the branch point c. The internal space of the bottle 252 is open to the atmosphere via the air filter 295. The pipe 223 corresponds to a third pipe.

  On the path of the pipe 223, a transmission type sensor 271 for detecting a decontamination liquid flowing down in the pipe 223 is attached. As will be described later, in a state where the decontamination liquid spraying apparatus 200 is operating normally, the decontamination liquid does not flow down to the pipe 223, and if any trouble occurs, the decontamination liquid flows down from the branch point c to the pipe 223. To do. Therefore, when the transmission sensor 271 detects the flow of the decontamination liquid, the transmission sensor 271 transmits a detection signal to the control device 240 to notify the abnormality. Note that the transmission sensor 271 may output a detection signal immediately when the flow of the decontamination liquid is detected, or may output a detection signal when the flow of the decontamination liquid of a certain amount is detected.

  In the present embodiment, the pipe 223, the bottle 252 and the transmission type sensor 271 are provided on the glove box 300 side of the branch path of the pipe 222, but may be provided on the pass box 400 side. Or you may provide in the upstream (pump 230 side) from the branch point b on the path | route of the pipe 222. FIG.

  Here, a filtration filter 292 is provided upstream of the branch point b on the path of the pipe 222. In addition, filtration filters 293 and 294 are provided between the branch point c and the sprayer 211 and between the branch point b and the sprayer 212, respectively. The filtration filters 292-294 remove impurities such as dust contained in the decontamination liquid sent from the pump 230.

  Valves 283 and 284 are provided between the branch point c and the filtration filter 293 and between the branch point b and the filtration filter 294, respectively, on the path of the pipe 222. The valves 283 and 284 are electromagnetic valves that open and close the path of the pipe 222 in which the valves 283 and 284 are installed. In this embodiment, the decontamination liquid is selectively supplied to the sprayers 211 and 212. It is controlled by the control device 240. However, the valves 283 and 284 may be controlled so that the decontamination liquid is supplied to both the sprayers 211 and 212. In the present embodiment, the opening / closing operation of the valves 281-284 is controlled so that air and decontamination liquid are supplied to at least one of the spray boxes of the glove box 300 and the pass box 400. Although it is supplied to the sprayer on the box 300 side, the situation that the decontamination liquid is supplied to the sprayer on the pass box 400 side does not occur.

  The pipe 224 is connected to the pipe 225 at the junction d on the path of the pipe 225. The pipe 224 is open at the end opposite to the junction d. The pipe 224 is a pipe that supplies air to the decontamination liquid supply path, and includes an electromagnetic valve 285 that opens and closes the pipe 224 and an air filter 296 that removes impurities contained in the air flowing in from the open end of the pipe 224. And. As will be described later, the valve 285 is normally closed and is opened to supply air to the decontamination liquid supply path in the final decontamination process. The pipe 224 corresponds to an air suction pipe.

(Control device)
The control device 240 is a device for adjusting the supply of air and the decontamination liquid in the decontamination liquid spraying apparatus 200. As shown in FIG. 2, the air compressor control unit 241, the pump control unit 242, and the valve control unit 243 are provided. Have. The control device 240 stores program data and various types of data, and executes predetermined programs for each function of the air compressor control unit 241, the pump control unit 242, and the valve control unit 243, and the air compressor 260 and the pump 230. , Controls the operation of the valves 281-285.

・ Air compressor control unit
The air compressor control unit 241 starts the air compressor 260 when an instruction to start decontamination is output from an operation unit (not shown). In addition, the air compressor control unit 241 stops the operation of the air compressor 260, for example, after a predetermined time has elapsed since the pump 230 stopped operating. This prevents the pump 230 from pumping up the decontamination liquid when the air compressor 260 is not operating, and prevents the decontamination liquid from dripping from the sprayers 211 and 212 into the glove box 300 and the pass box 400. Can be prevented. Note that the air compressor control unit 241 may stop the operation of the air compressor 260 based on an instruction from the operation unit to stop the decontamination process.

・ Pump control unit
The pump control unit 242 starts the forward rotation operation of the pump 230 when the air compressor control unit 241 starts the air compressor 260. For example, the pump control unit 242 starts the forward rotation operation of the pump 230 after a predetermined time has elapsed since the start of the air compressor 260. Thus, the pump 230 can be prevented from pumping the decontamination liquid while the air compressor 260 is stopped, and the decontamination liquid dripping from the sprayers 211 and 212 into the glove box 300 and the pass box 400 can be prevented. Can be prevented.

  In addition, the pump control unit 242 is configured to operate the pump based on a measurement signal from the measuring instrument 272, a detection signal from the transmission sensor 271, or an instruction from an operation unit (not shown) for stopping the decontamination process. The forward rotation operation 230 is stopped. That is, when a predetermined amount of decontamination liquid is pumped up from the tank 251 and an abnormality occurs in which the decontamination liquid flows down to the pipe 223 during the forward rotation operation, or when the operator instructs to stop the decontamination process, the pump control unit 242 Stops the pump. The pump control unit 242 may also stop the forward rotation operation of the pump 230 when the air compressor control unit 241 stops the operation of the air compressor 260.

  After stopping the forward rotation operation of the pump 230, the pump control unit 242 reversely operates the pump 230 in order to collect the decontamination liquid remaining in the decontamination liquid supply path into the tank 251.

・ Valve controller
For example, when an instruction to decontaminate the inside of the glove box 300 is output from an operation unit (not shown), the valve control unit 243 opens the valves 281 and 283 and closes the valves 282 and 284. In addition, when an instruction to decontaminate the inside of the pass box 400 is output from the operation unit, the valve control unit 243 opens the valves 282 and 284 and closes the valves 281 and 283. In any case, the valve control unit 243 closes the valve 285. Therefore, the decontamination liquid spraying apparatus 200 decontaminates at least one of the glove box 300 and the pass box 400 in this embodiment. However, the valve control unit 243 may open and close the valves 281 to 284 so as to decontaminate both the glove box 300 and the pass box 400 at the same time.

  When the valve control unit 243 outputs an instruction to stop decontamination from an operation unit (not shown), or when a measurement signal indicating that a predetermined amount of decontamination liquid has been pumped from the tank 251 is output from the measuring instrument 272, In order to supply air from the pipe 224 to the decontamination liquid supply path, the valve 285 is opened for a predetermined time. Thereafter, the valve control unit 243 closes the valves 283-285 for the reverse operation of the pump 230 described above.

  When the transmission type sensor 271 detects the flow of the decontamination liquid to the pipe 223, the valve control unit 243 performs the operation of supplying the air from the pipe 224 to the decontamination liquid supply path without performing the operation of supplying the air to the pump 230. Valves 283-285 are closed for reverse operation.

=== Operation of Isolator ===
<Spraying of decontamination liquid with a sprayer>
With reference to FIG. 1, the mechanism by which the sprayers 211 and 212 spray the decontamination liquid will be described. In addition, although operation | movement of the sprayer 211 is demonstrated here, operation | movement of the sprayer 212 is also the same.

  The air supplied from the air compressor 260 to the first port 211 </ b> A of the sprayer 211 is jetted from the nozzle opening at a higher flow rate inside the sprayer 211. Thus, when the flow velocity of air rises inside the sprayer 211, the pressure in the flow path from the first port 211A to the nozzle port becomes lower (negative pressure) than the surrounding pressure. For this reason, the pressure of the second port 211B communicating with the flow path is also negative. As a result, the decontamination liquid sent to the branch point c by the pump 230 flows into the second port 211B of the sprayer 211 without flowing down the pipe 223. And decontamination liquid merges with the air which flowed in into sprayer 211 from the 1st port 211A, and is ejected as mist-like gas from a nozzle mouth. In this way, the decontamination liquid can be effectively sprayed into the glove box 300 or the pass box 400 without using a heater or a vaporizer using ultrasonic waves when atomizing the decontamination liquid. Can do.

  Note that sufficient air is not supplied to the sprayer 211 due to a failure of the air compressor 260, clogging of the air filter 291, malfunction of the valves 281 and 282, and an appropriate negative pressure cannot be obtained at the branch point c of the pipe 222. Then, the decontamination liquid flows down the pipe 223. When such a flow of the decontamination liquid is detected by the transmission type sensor 271, the control device 240 determines that an abnormality has occurred in the decontamination liquid spraying apparatus 200 and stops the forward rotation operation of the pump 230. Note that the decontamination liquid dropped from the pipe 223 to the bottle 252 is collected in the tank 251 from the pipe 223 via the pipe 222 and the pump 230 by the reverse operation of the pump 230.

<Isolator operation>
The operation of the isolator 100 will be described with reference to FIGS. 3A to 3D. 3A shows a process in which the decontamination liquid spraying device 200 decontaminates the inside of the glove box 300 by the forward rotation operation of the pump 230, and FIG. 3B shows the decontamination liquid remaining inside the decontamination liquid supply path to the sprayer. 3C shows the process of supplying air to the decontamination liquid supply path, FIG. 3C shows the state where the decontamination liquid remains in the supply path after the pump 230 is stopped, and FIG. Each of the steps of collecting the decontamination solution is schematically shown. Here, the decontamination process will be described assuming that the inside of the glove box 300 is decontaminated, but the inside of the pass box 400 is similarly decontaminated.

(Decontamination spray)
When the operator instructs the controller 240 to decontaminate the glove box 300 via an operation unit (not shown), the decontamination process starts. Specifically, as shown in FIG. 3A, under the control of the control device 240, the valves 281 and 283 are opened, and the valves 282, 284 and 285 are closed. Then, the air compressor 260 is started and air is pumped from the pipe 221 to the sprayer 211. Further, the decontamination liquid is pumped up from the tank 251 by the forward rotation operation of the pump 230, and is sent to the sprayer 211 through the pipe 222. Such air and decontamination liquid flows are indicated by arrows in FIG. 3A. In this way, the air and the decontamination liquid that have flowed into the sprayer 211 merge inside the sprayer 211 and are injected into the glove box 300 from the nozzle of the sprayer 211 as described above.

  In a normal operation state, an appropriate negative pressure is generated at the confluence point c on the path of the pipe 222, so that the decontamination liquid flows toward the sprayer 211 without flowing down the pipe 223. On the other hand, when some abnormality occurs and an appropriate negative pressure cannot be obtained at the confluence point c on the path of the pipe 222, the decontamination liquid flows down to the pipe 223 as shown by the dashed arrow in FIG. 3A. The operation of the decontamination liquid spraying apparatus 200 when such an abnormality occurs will be described later.

  When a predetermined amount of decontamination liquid is pumped up from the tank 251 by the forward rotation operation of the pump 230, the valve 285 is opened and the pipe 224 through the pipe 225 are opened as shown in FIG. Air flows into the. As a result, the decontamination liquid cannot be pumped from the tank 251. On the other hand, the air that has flowed into the pipe 225 moves up the decontamination liquid supply path toward the sprayer 211 while pushing up the decontamination liquid remaining in the decontamination liquid supply path, and therefore remains in the decontamination liquid supply path. The decontamination liquid that has been transferred is transported to the sprayer 211. Thereby, the decontamination liquid remaining in the decontamination liquid supply path is sprayed into the glove box 300.

  Then, as shown in FIG. 3C, the valves 283 and 285 are closed and the pump 230 is stopped to start the decontamination liquid recovery process. Further, when the operator instructs to stop decontamination via an operation unit (not shown), the forward rotation operation of the pump 230 is stopped through the same procedure as described above. On the other hand, when the pump 230 is stopped due to the above-described abnormality, the supply of air from the pipe 224 to the decontamination liquid supply path is omitted.

(Recovery of decontamination solution)
At the stage where the forward rotation operation of the pump 230 is stopped, the decontamination liquid remains on the decontamination liquid supply path, particularly the inner wall of the pipe surrounded by the one-dot chain line in FIG. 3C. If the remaining decontamination liquid is allowed to stand, the decontamination liquid may be dripped from the pipe 225 or may be ejected from the sprayers 211 and 212, and is thus collected in the tank 251.

Specifically, as shown in FIG. 3D, the pump 230 is operated in reverse to generate an air flow toward the tank 251 as indicated by an arrow in FIG. 3D in the decontamination liquid supply path. As a result, for example, the decontamination liquid adhering to the inner wall of the pipe 222 flows toward the pump 230 and is collected in the tank 251. At this time, if there is a decontamination liquid stored in the bottle 252, the decontamination liquid is also collected in the tank 251 from the pipe 223 through the pipe 222. Thereby, while avoiding the contamination of the apparatus mentioned above and the danger to an operator, the decontamination liquid can be effectively used.
In this way, a series of decontamination steps are completed.

  As described above, the decontamination liquid spraying apparatus 200 has the first port 211A, the second port 211B, and the sprayer 211 having a nozzle port, one end connected to the air compressor 260, and the other end connected to the first port 211A. The pipe 221, the pump 230 that pumps the decontamination liquid from the tank 251 that stores the decontamination liquid, one end is connected to the second port 211 </ b> B, and the other end is connected to the pump 230. A pipe 222 through which the decontaminated liquid pumped up flows, and a controller 240 that controls the operation of the pump 230. The sprayer 211 sucks the decontamination liquid flowing through the pipe 222 by the negative pressure generated in the second port 211B when the air taken in from the first port 211A is ejected from the nozzle port, and mixes the decontamination liquid with the air. And sprayed from the nozzle opening. In addition, when the sprayer 211 finishes spraying the decontamination liquid, the control device 240 reversely operates the pump 230 to collect the decontamination liquid remaining in the pipe 222. Therefore, it is possible to prevent the decontamination liquid from remaining in the supply path of the decontamination liquid after the decontamination process is completed.

  A pipe 223 that branches off from the pipe 222 at a branch point c on the path of the pipe 222 and is opened at an end opposite to the branch point c; a bottle 252 that receives a decontamination liquid flowing down from the pipe 223; Since the decontamination liquid flows into the bottle 252 from the branch point c through the pipe 223 at the time of an abnormality in which an appropriate negative pressure does not occur in the second port 211B of the sprayer 211, the decontamination space from the sprayer 211 is provided. It is possible to prevent the decontamination liquid from dripping inside.

  Further, the apparatus further includes a transmission sensor 271 that detects the decontamination liquid flowing down the pipe 223 and outputs a detection signal. When the control device 240 receives the detection signal from the transmission sensor 271 during the forward rotation operation of the pump 230. By stopping the pump 230, it is possible to immediately stop the decontamination process when an abnormality occurs and to prevent the decontamination liquid from dripping from the sprayer 211 into the decontamination space.

  In addition, after the pump 230 is stopped, the control device 240 rotates the pump 230 in reverse so as to collect the decontamination solution stored in the bottle 252 so that the decontamination solution can be effectively used.

  Further, the apparatus further includes a measuring device 272 that measures the amount of the decontamination liquid pumped from the tank 251 by the forward rotation operation of the pump 230, and the control device 240 receives a predetermined amount of decontamination liquid during the forward rotation operation of the pump 230. When a measurement signal indicating that the water has been pumped from the tank 251 is received from the measuring device 272, the pump 230 is stopped, so that an appropriate amount of decontamination liquid can be sprayed according to the decontamination space.

  The pump 230 further includes a pipe 225 that pumps the decontamination liquid from the tank 251, and further includes a pipe 224 having one end connected at a junction point d on the path of the pipe 225 and the other end opened. 224 has a valve 285 that opens and closes the path of the pipe 224, and the controller 240 opens the valve 285 to supply the decontamination liquid remaining in the pipe 222 to the sprayer 211, and then corrects the pump 230. By stopping the rolling operation, it is possible to prevent the decontamination liquid from remaining in the supply path of the decontamination liquid after the decontamination process.

  The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

100 Isolator 200 Decontamination liquid spraying device 211, 212 Sprayer 221-225 Pipe 230 Pump 240 Control device 251 Tank 260 Compressor 300 Glove box 400 Pass box

Claims (7)

A sprayer having a first port, a second port, and a nozzle port;
A first pipe having one end connected to the air compressor and the other end connected to the first port;
A pump for pumping the decontamination liquid from a container for storing the decontamination liquid;
A second pipe having one end connected to the second port and the other end connected to the pump, through which a decontamination liquid pumped up by forward rotation of the pump flows;
A control device for controlling the operation of the pump;
With
The sprayer sucks the decontamination liquid flowing through the second pipe by the negative pressure generated in the second port when the air taken in from the first port is ejected from the nozzle port, and the decontamination liquid is aired. And sprayed from the nozzle opening,
When the sprayer finishes spraying the decontamination liquid, the control device reversely operates the pump to recover the decontamination liquid remaining in the second pipe. A third pipe branched from the second pipe at a branch point on the path of the second pipe and opened at an end opposite to the branch point;
A bottle for receiving a decontamination liquid flowing down from the third pipe;
The decontamination liquid spraying apparatus according to claim 1, further comprising: A sensor for detecting a decontamination liquid flowing down the third pipe and outputting a detection signal;
The said control apparatus stops the said pump, if the said detection signal is received from the said sensor at the time of the normal rotation driving | operation of the said pump, The decontamination liquid spraying apparatus of Claim 2 characterized by the above-mentioned. 4. The decontamination liquid spraying apparatus according to claim 3, wherein the controller reversely operates the pump to recover the decontamination liquid stored in the bottle after the pump is stopped. 5. A measuring instrument for measuring the amount of decontamination liquid pumped from the container by normal operation of the pump;
The control device stops the pump when receiving the measurement signal indicating that a predetermined amount of decontamination liquid has been pumped from the container during forward rotation of the pump. Item 5. The decontamination liquid spraying device according to any one of Items 1-4. The pump has a pipe portion that pumps the decontamination liquid from the container,
The air intake pipe further comprising one end connected at a confluence on the path of the pipe part and the other end opened,
The air suction pipe has a valve for opening and closing a path of the air suction pipe;
The said control apparatus stops the said normal rotation driving | operation of the said pump, after opening the said valve to supply the decontamination liquid which remains in 2nd piping to the said sprayer. The decontamination liquid spray apparatus as described. The sprayer is installed in at least one of a working chamber for performing work on cells and a pass box for carrying cells into the working chamber. The decontamination liquid spraying device according to any one of -6.

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