JP2599929B2 - Closed room disinfection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention sterilizes the interior of a closed room such as a clean room, a bio-clean room, an operating room, or a general living room for manufacturing semiconductors, precision equipment, and chemicals. Regarding improvement of equipment for disinfecting with gas, especially when supplying sterilized gas such as formalin gas which affects the human body to a closed room and disinfecting it, make sure that there is no person in the closed room before disinfecting. The present invention relates to a disinfection device for a closed chamber which has been manufactured as described above.

[Conventional technology]

As a conventional method for supplying a sterilizing gas to a closed chamber, for example, a method described in Japanese Patent Application Laid-Open No. 61-232857 is known.

Since this conventional method uses phytoncide as a sterilizing gas that does not affect the human body, when disinfecting a closed room, it is possible to perform a disinfection operation regardless of whether or not a person is present in the closed room. There is no need to check if a person exists.

In addition, when using a gas that affects the human body, such as formalin gas, bring the formalin gas generator into the closed room each time, and make sure that there are no people in the closed room before activating the formalin gas generator. The way has been taken.

[Problems to be solved by the invention]

However, in the former conventional method, there is a problem that phytontide, which is a sterilizing gas that does not affect the human body, is extremely difficult to obtain and expensive.

Therefore, at present, formalin or the like is used as a disinfectant as in the latter method, but in this case, as described above, the formalin gas generator must be brought into the closed room every time disinfection is performed, so that the closed room is cleaned. In order to maintain the degree of cleanliness, there is a disadvantage that the cleanliness must be maintained by an air shower every time the gas generator is carried in and out.

The present invention has been made in view of such a conventional problem, and it is possible to economically, easily and safely disinfect a sealed room without adversely affecting the human body using formalin gas. It is an object to provide a disinfection device for a room.

[Means for solving the problem]

Therefore, the disinfection device for a closed chamber according to the present invention comprises the first
As shown in the figure, an air conditioner having a bypass in a heat exchanger section and a bypass damper for opening and closing the bypass, and a sterilizing gas for introducing a sterilizing gas from outside the closed chamber to a position facing an outlet in the air conditioner. Introduction means, means for detecting infrared radiation emitted from a human body present in the closed room, and means for determining whether or not a person is present in the closed room from a detection signal from the detection means. You.

Then, during normal air conditioning, the bypass damper is closed to allow the air taken into the air conditioner to pass through the heat exchanger, and a conditioned air is supplied from the blower outlet to the closed chamber by the blower in the air conditioner. When it is determined by the determining means that no person is present in the closed chamber, a bypass damper is opened so that gas in the air conditioner passes through the bypass, and sterilizing gas is introduced into the air conditioner by the sterilizing gas introducing means. Then, sterilizing gas is supplied from the outlet to the closed chamber by the blower, and the sterilizing gas in the closed chamber is circulated through the bypass.

[Action]

When disinfection is to be performed by supplying a sterilizing gas into the closed chamber, it is determined whether or not a person is present in the closed chamber by the determination unit based on a detection signal from a unit that detects infrared rays emitted from the human body, Only when the determination means determines that no person is present in the closed room, the disinfecting operation is performed by supplying the sterilizing gas from the outlet through the air conditioner into the closed room. For this reason, when formalin gas or the like, which has an effect on the human body, is used as the sterilizing gas, it is possible to easily and safely disinfect the closed chamber economically.

In addition, in this apparatus, sterilizing gas is supplied to the closed room by using a blower and an outlet of an air conditioner that normally supplies conditioned air to the closed room, so equipment cost for supplying the sterilizing gas to the closed room is low. Can be reduced.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, referring to FIG. 2, reference numeral 1 denotes a clean room, and reference numeral 2 denotes a door. The door 2 is provided with a remote control knob 3 which can be locked and unlocked by remote control. An exhaust port 4 is provided in a part of the clean room 1.
And an exhaust port damper 5 and an exhaust fan 6 are arranged. By driving the exhaust fan 6, air in the clean room 1 can be exhausted to the outside.

Reference numeral 8 denotes an air conditioner. The air conditioner 8 includes a heat exchanger 9, a bypass 10a, a bypass damper 10 for opening and closing the bypass 10a, a blower 11, and a high-performance filter 12. And an outside air processing filter 14 and an outside air duct damper 15. In addition, outside air intake duct 13
An intake port 16 and an intake port damper 17 are arranged at a boundary portion between the clean room 1 and the air conditioner 8 at a portion facing the air conditioner, and a blower is provided at a boundary portion between the clean room 1 and the air conditioner 8 above the air conditioner 8. An outlet 18 is arranged.

Reference numeral 19 denotes a formalin gas generator for generating formalin gas as a sterilizing gas. The formalin gas generator 19 is connected to a portion of the air conditioner 8 facing the air outlet 18 by a formalin gas supply pipe 20, and is connected to the formalin gas. In the middle of the supply pipe 20, a valve 21 for opening and closing the supply of formalin gas is provided.
The formalin gas supply pipe 20 has an air conditioner 8
A formalin gas injection nozzle 22 is attached to the connection portion to the.

For example, an appropriate number of infrared sensors 24 are attached to, for example, the ceiling of the clean room 1, and the infrared sensors 24 detect infrared rays radiated from a human body and detect the presence of a person in the clean room 1.

Reference numeral 26 denotes a controller. A detection signal of the infrared sensor 24 is sent to the controller 26, and the controller 26 sends the exhaust port damper 5, the exhaust fan 6, the bypass damper 10, the blower 11, the outside air duct damper 15, A control signal for operating each of the intake port damper 17, the formalin gas generator 19, and the valve 21 is supplied.

 Next, the operation of this embodiment will be described.

In FIG. 2, when the power of the controller 26 is turned on, a detection signal of the infrared sensor 24 is sent to the controller 26.

The clean room 1 is normally air-conditioned by an air conditioner 8. During this air-conditioning operation, a control signal from the controller 26 closes the bypass damper 10 and the intake damper 17.
Is opened, damper 15 for outside air duct and damper 5 for exhaust port
Is open with an opening that matches the required outside air volume and displacement volume,
The air in the clean room 1 is sucked into the inside of the air conditioner 8 from the air inlet 16 by the blower 11 of the air conditioner 8, exchanges heat in the heat exchanger 9, is pressure-fed by the blower 11, and
The dust is removed by the
Sent to and circulated. At this time, air corresponding to the amount of air exhausted from the exhaust port 4 is taken into the air conditioner 8 from the outside air intake duct 13.

FIG. 3 shows a procedure of processing executed when the clean room 1 is disinfected. In FIG. 3, a detection signal of the infrared sensor 24 is sent to the controller 26 (step), and this detection signal is ON. It is determined whether or not there is a person in the clean room 1 based on whether or not (step). If a person is present in the clean room 1 and the infrared sensor 24 is ON, a red light is lit on the display window of the controller 26, and if no person is present and the infrared sensor 24 is OFF,
The display window changes to a green light. In this case, as many display windows as the number of infrared sensors 24 may be provided, or one window may be provided for one room of the clean room 1. When the number of the display windows is equal to the number of the infrared sensors 24, the corresponding display windows are turned on by a red light or a green light according to the operation of each infrared sensor 24 to indicate the presence / absence of a person.
In the case of a plurality of infrared sensors 24, the red light is turned on when any one of the infrared sensors 24 detects the presence of a person, and the green light is turned on when all the infrared sensors 24 do not detect the presence of a person. .

If the display indicates that a person is present in the clean room 1, the clean room 1 is not disinfected.

When it is determined that no person is present in the clean room 1, the door 2 is controlled by a control signal from the controller 26.
The remote control knob 3 is locked (step) to prevent a person from entering the clean room 1. Next, the operation of the air conditioner 8 is stopped (step), the damper 15 for the outside air duct and the damper 5 for the exhaust port are closed, the damper 10 for the bypass is opened (step), the valve 21 is opened, and then the formalin gas generator is opened. 19 is operated (step), the blower 11 is operated (step), and the formalin gas injected from the formalin gas injection nozzle 22 is
The air is supplied into the clean room 1 through the outlet 18.

Here, since the bypass damper 10 is opened,
The gas in the clean room 1 sucked into the air conditioner 8 from the air inlet 16 is sent from the outlet 18 to the clean room 1 and circulates through the bypass 10a. Thus, the formalin gas supplied into the clean room 1 is circulated through the bypass 10a.

When a predetermined amount of formalin gas is supplied, the formalin gas generator 19 is stopped (step), the valve 21 is closed, the blower 11 is stopped after a predetermined time (step), and the clean room 1 is left for a predetermined time necessary for disinfection. The inside is fumigated and disinfected (step).

When the disinfection is completed, the damper 15 for the outside air duct and the damper 5 for the exhaust port are opened, the damper 17 for the intake port is closed (step), the blower 11 and the exhaust fan 6 are operated for a predetermined time (step), and the inside of the clean room 1 and The air containing formalin gas in the air conditioner 8 is exhausted outside the clean room 1 (step).

When the formalin gas has been exhausted, the bypass damper 10 is closed, the intake port damper 17 is opened, and the outside air duct damper 15 and the exhaust port damper 5 are set to predetermined openings (step), and heat exchange is performed. The blower 11 is operated while the heat exchanger 9 is performing the heat exchange to resume the normal air-conditioning operation, and the lock of the remote control knob 3 of the door 2 of the clean room 1 is released (step).

Further, in the above-described automatic locking, if the lock cannot be performed due to a failure or the like, the fact is displayed on the controller 26.

Further, if a person enters the clean room 1 during disinfection for some reason despite the lock, the infrared sensor 24 is activated immediately and a red light is lit on the display window of the controller 26 to issue an alarm. And at the same time clean room 1
Insiders should be warned to leave the room immediately. Then, the formalin gas generator 19 and the blower 11 are stopped by the controller 26, and the valve 21
Is closed, and the damper 15 for the outside air duct and the damper 5 for the exhaust port are closed.
Is opened, the exhaust fan 6 is operated, and the clean room 1 is opened.
Discharge the formalin gas inside the room. When the intruder leaves the clean room 1, the controller 26 resumes the operation from the beginning.

Although the series of operations described above are performed automatically by the controller 26, they may be performed manually.

〔The invention's effect〕

As described above, according to the sterilization apparatus for a closed chamber according to the present invention, the sterilizing gas is supplied into the closed chamber when the determination unit determines that no person is present in the closed chamber. Even formalin gas, which has an effect on the human body as a gas, can be used economically, easily and safely to disinfect a closed chamber.

In addition, this device is equipped with an air conditioner having a bypass and a damper for bypass in the heat exchanger section, and normally uses a blower and an outlet of an air conditioner that supplies conditioned air into the closed room to send sterilizing gas into the closed room. Because of the supply, the equipment cost for supplying the sterilizing gas into the closed chamber can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a basic structure of a disinfecting apparatus for a closed chamber according to the present invention, FIG. 2 is a structural view showing one embodiment of the present invention, and FIG. It is a flowchart for explaining. 1 …… Clean room (closed room), 8 …… Air conditioner, 9…
... heat exchanger, 10 ... bypass damper, 10a ... bypass, 11 ... blower, 12 ... high-performance filter, 19 ... formalin gas generator (sterilizing gas introduction means), 21 ... valve (sterilizing gas) Introducing means), 22 ... formalin gas injection nozzle (sterilizing gas introducing means), 24 ... infrared sensor (detecting means), 26 ... controller (determining means).

Claims (1)

(57) [Claims] An air conditioner having a bypass in a heat exchanger section and a bypass damper for opening and closing the bypass, and a sterilizing gas introducing means for introducing a sterilizing gas from outside the closed chamber to a position facing an air outlet in the air conditioner. And means for detecting infrared rays radiated from a human body present in the closed room, and means for determining whether or not a person is present in the closed room from a detection signal from the detecting means, At the time of air conditioning, the bypass damper is closed to allow the air taken into the air conditioner to pass through the heat exchanger, and conditioned air is supplied from the blower outlet to the closed chamber by the blower in the air conditioner.
At the time of disinfection, when it is determined by the determining means that no person is present in the closed chamber, a bypass damper is opened to allow gas in the air conditioner to pass through the bypass, and the sterilizing gas introduction means sterilizes the air into the air conditioner. A disinfecting apparatus for a closed chamber, wherein gas is introduced, sterilizing gas is supplied from an outlet to the closed chamber by the blower, and the sterilizing gas in the closed chamber is circulated through the bypass.