Ventilation system and ventilation method

Abstract

An object of the present invention is to provide a ventilation system and a ventilation method capable of suppressing excessive handling related to odor handling and environmental maintenance in a facility that performs treatment of an odorous substance transported by a vehicle, and reducing running costs in facility operation, in particular, saving power.SOLUTION: In order to solve the above problem, there are provided a ventilation system which is applied to a facility for treating an odorous substance carried by a vehicle, and includes a detection unit for detecting the presence or absence of a vehicle entering the facility, and a control unit for controlling an air volume of a ventilation fan installed in the facility based on a detection result of the detection unit, and a ventilation method by the ventilation system. According to the present invention, it is possible to take measures according to the situation in the facility (such as the required level of odor control), and it is possible to suppress excessive measures related to odor control and environmental maintenance in the facility. In addition, by setting the air volume of the ventilation fan as a control target, it is possible to effectively achieve power saving related to facility operation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ventilation system and a ventilation method, and more particularly to a ventilation system and a ventilation method in a facility for treating odorous substances transported by vehicles. [Background technology]

[0002] Generally, various types of waste to be treated (for example, general waste, industrial waste, etc.) are collected from their sources and transported to treatment facilities. In particular, it is known that, after collection, materials to be treated that emit odors (hereinafter also referred to as "odor-causing materials") are loaded onto vehicles and transported to treatment facilities. In this case, within the treatment facility where vehicles loaded with materials to be treated (smelly materials) enter, it is required to install means to deal with the odors originating from the materials to be treated and to maintain the environment both inside and outside the treatment facility.

[0003] For example, Patent Document 1 describes a sterilization and deodorization device and method that sprays hypochlorous acid-containing water as vehicles carrying materials to be treated (smelly substances) enter a treatment facility (malodorous substance storage facility) into which the vehicles enter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-081802 Summary of the Invention [Problem to be solved by the invention]

[0005] As shown in Patent Document 1, when operating a treatment facility, using chemicals such as hypochlorous acid-containing water to address odors and maintain the environment poses challenges from the perspective of running costs, such as the cost of the chemicals and the need for maintenance of the means for spraying the chemicals. On the other hand, as a way to deal with odors and maintain the environment without relying on chemicals, ventilation within the treatment facility is also carried out to dilute the odor. In this case, if ventilation is always carried out at a constant air volume regardless of the situation inside the treatment facility, it will be an excessive response to the level of odor control required within the treatment facility, and issues will arise from the perspective of running costs.

[0006] The objective of the present invention is to provide a ventilation system and ventilation method that can suppress excessive responses to odor control and environmental maintenance in facilities that treat odorous materials transported by vehicles, and that can reduce running costs in facility operation, particularly power consumption. [Means for solving the problem]

[0007] As a result of thorough research into the above-mentioned problems, the inventors have discovered that when ventilating a facility that treats odorous materials transported by vehicles as a measure to deal with odors and maintain the environment, it is possible to grasp the situation inside the facility based on the presence or absence of vehicles entering the facility, and at the same time, control the air volume of the ventilation fan, thereby preventing excessive measures to deal with odors and maintain the environment in the facility and reducing running costs, particularly power consumption, in operating the facility, and have completed this invention. That is, the present invention provides the following ventilation system and ventilation method.

[0008] The ventilation system of the present invention, which solves the above problems, is a ventilation system in a facility that treats odorous substances transported by vehicles, and is characterized by having a detection unit that detects whether or not a vehicle is entering the facility, and a control unit that controls the air volume of a ventilation fan installed in the facility based on the detection result of the detection unit. This ventilation system is suitable for facilities that require environmental maintenance both inside and outside the facility and odor control, particularly those that treat odorous materials transported by vehicles.By understanding the situation inside the facility (the level of odor control required, etc.) based on the presence or absence of vehicles entering the facility and controlling the system based on this, it is possible to prevent excessive odor control and environmental maintenance in the facility.In addition, by controlling the air volume of the ventilation fan, it is possible to optimize the energy consumption required to drive the ventilation fan, which in turn makes it possible to effectively save power in facility operation.

[0009] In one embodiment of the ventilation system of the present invention, the detection unit includes an imaging means. This feature makes it easy to detect the presence or absence of a vehicle over a wide area, improving detection accuracy (preventing vehicles from being overlooked). It also makes it easy to distinguish between vehicles transporting odorous substances and other objects (including workers, etc.), and to identify vehicle characteristics (vehicle size, contents of cargo), preventing false detections and facilitating control according to detection results other than the presence or absence of a vehicle.

[0010] Furthermore, one embodiment of the ventilation system of the present invention has a feature in that the air volume of the ventilation fan is reduced after a predetermined time has elapsed since the detection unit detected that the vehicle has left. When a vehicle that has entered a facility completes its designated work and leaves, the odor may remain even after the vehicle has left. According to this feature, by reducing the airflow of the ventilation fan after the vehicle has left and a specified time has passed, it is possible to adequately deal with odors while preventing excessive responses to odors and environmental maintenance at the facility.

[0011] The ventilation method of the present invention for solving the above problems is a ventilation method for a facility that treats odorous substances transported by vehicles, and is characterized by comprising a detection step of detecting the presence or absence of a vehicle entering the facility, and a control step of controlling the air volume of a ventilation fan installed in the facility based on the detection result of the detection step. This ventilation method is suitable for facilities that require environmental maintenance both inside and outside the facility and odor control, particularly those that treat odorous materials transported by vehicles.By understanding the situation inside the facility (the level of odor control required, etc.) based on the presence or absence of vehicles entering the facility and controlling the system based on this, it is possible to prevent excessive odor control and environmental maintenance in the facility.In addition, by controlling the air volume of the ventilation fan, it is possible to optimize the energy consumption required to drive the ventilation fan, which in turn makes it possible to effectively save power in facility operation. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a ventilation system and a ventilation method that can suppress excessive responses to odors and environmental maintenance in facilities that treat odorous materials transported by vehicles, and that can reduce running costs in facility operation, particularly power consumption. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic explanatory diagram showing the structure of a ventilation system according to an embodiment of the present invention. [Figure 2] 1 is a flowchart illustrating the operation of a ventilation system according to an embodiment of the present invention. [Figure 3] 10 shows another example of a flowchart relating to the operation of a ventilation system in an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] The ventilation system and ventilation method of the present invention are applicable to facilities that require environmental maintenance inside and outside the facility and odor control, and in particular to facilities that treat odorous substances transported by vehicle.

[0015] Specific examples of the "facility" in the present invention include garbage collection facilities for general waste and industrial waste, sewage treatment facilities, and sludge treatment facilities. Furthermore, the term "odor-causing substance" in the present invention refers to a substance to be treated that emits an odor, and specific examples thereof include garbage (general waste and industrial waste), human waste, sludge, and the like. The term "vehicle" in the present invention refers to any mobile body having a structure for transporting odorous substances, and there are no particular limitations on the means for loading the odorous substances or the number of wheels and axles. Specific examples include special-purpose vehicles such as garbage collection vehicles (garbage trucks, compactor trucks) and vacuum trucks, as well as freight vehicles such as so-called trucks (both large and small).

[0016] Hereinafter, embodiments of the ventilation system and ventilation method according to the present invention will be described in detail with reference to the drawings. Note that the ventilation method of the present invention will be substituted for the following description of the structure and operation of the ventilation system. Furthermore, the ventilation system and ventilation method described in the embodiments are merely examples for explaining the ventilation system and ventilation method according to the present invention, and are not limited thereto.

[0017] FIG. 1 is a schematic explanatory diagram showing the structure of a ventilation system 1 according to an embodiment of the present invention. As shown in Figure 1, the ventilation system 1 of this embodiment is installed within a facility 100 where a vehicle V loaded with odorous substances can enter and which is equipped with equipment for treating the odorous substances, and is equipped with a detection unit 2 for detecting the status of the facility 100, a control unit 3 for taking measures related to odor control and environmental maintenance in the facility 100, and a ventilation fan 4 that is driven and controlled by the control unit 3. In FIG. 1, the white arrows indicate the direction of movement of the vehicle, and the dashed arrows indicate connections that are controllable or inputtable.

[0018] (facility) The facility 100 of this embodiment may be any facility that treats odorous substances transported by a vehicle V, and there are no particular restrictions on the various equipment and layout provided within the facility 100. However, a specific example, as shown in FIG. 1, includes a receiving room 101 through which the vehicle V enters and exits, a treatment facility 102 that stores and treats the odorous substances transported by the vehicle V, and an input section 103 for inputting the odorous substances from the receiving room 101 into the treatment facility 102.

[0019] The receiving room 101 has side walls and a ceiling, and forms a space that allows a vehicle V loaded with odorous substances to enter, and also functions as a work space where the odorous substances loaded on the vehicle V are discharged into the treatment equipment 102. An entrance / exit for the vehicle V to enter and exit is provided in a part (side wall) of the receiving room 101. In this case, it is preferable to provide an opening / closing mechanism (door, shutter, etc.) at this entrance / exit that opens and closes in response to the entry and exit of the vehicle V, thereby reducing the time that the entrance / exit side of the receiving room 101 is in a state where it is connected to the outside (open state).

[0020] Furthermore, the receiving room 101 is equipped with a ventilation means as a means for dealing with odors within the facility 100 and maintaining the environment both inside and outside the facility 100. It is preferable that the odors exhausted by the ventilation means are introduced into a deodorizing facility D installed outside the receiving room 101 as shown in Figure 1, and deodorized. This makes it possible to maintain the working environment for workers within the facility 100 and also to prevent high-concentration odors from leaking outside the facility 100. The ventilation means provided in facility 100 (receiving room 101) is not particularly limited, but specifically includes a ventilation fan 4, an air intake 4a, and an exhaust 4b, as shown in Fig. 1. The ventilation means may be installed, for example, outside receiving room 101 via a duct installed in receiving room 101, or may be installed on the ceiling or side wall of receiving room 101. In this case, the structure of ventilation fan 4 itself is not particularly limited, but a fan capable of inverter control of the rotation speed (drive unit) is used to enable air volume control by control unit 3, which will be described later. 1 shows a configuration in which one ventilation fan 4 is provided for the exhaust port 4b and natural air intake is provided for the air intake port 4a, but this is not limited to this. For example, a ventilation fan 4 may be provided for each of the air intake port 4a and the exhaust port 4b, or one ventilation fan 4 may be provided for each of the air intake port 4a and the exhaust port 4b. From the perspective of easily stabilizing the ventilation conditions (ventilation state) within the facility 100 (receiving room 101), it is preferable to provide one ventilation fan 4 for the exhaust port 4b and natural air intake is provided for the air intake port 4a, as shown in FIG. 1. In this case, the ventilation means may be provided with members and equipment for collecting odors, such as providing filters as odor collecting materials at the air intake port 4a and / or the exhaust port 4b.

[0021] The treatment facility 102 is connected to the receiving room 101 via an input section 103, and receives and treats the odorous substances loaded on the vehicle V. As the treatment equipment 102, known treatment equipment according to the type of odorous substance can be used, such as various treatment equipment related to water treatment (equipment related to filtration, dehydration, membrane separation, biological treatment, etc.), as well as crushing equipment, incineration equipment, and odorous substance storage equipment.

[0022] The input section 103 connects the receiving room 101 with the treatment facility 102, and is used to input the odorous substances loaded on the vehicle V from the vehicle V to the treatment facility 102 side. The input section 103 has a structure that connects the receiving chamber 101 and the treatment equipment 102, and may be provided with a lid, door, or the like that seals this connection except when the odorous substance is being input. Examples of the structure that connects the receiving chamber 101 and the treatment equipment 102 include a communication pipe that can connect the side of the vehicle V to the treatment equipment 102, and a hole (opening) that connects the side walls of the receiving chamber 101 and the treatment equipment 102.

[0023] In the above-described facility 100, odorous substances are not always present in the receiving room 101 and emitting an odor, but rather, after the entry of the vehicle V, an odor is temporarily emitted when the odorous substances are put into (moved to) the treatment equipment 102. Therefore, as a means of dealing with odors within the facility 100 and maintaining the environment inside and outside the facility 100, constantly ventilating the facility 100 to an extent that dilutes the odor caused by the odorous substances emitted upon the entry of the vehicle V would be an excessive response, leading to an increase in the running costs associated with the operation of the facility 100.

[0024] (Ventilation system) The ventilation system 1 in this embodiment is applied to a facility (the facility 100 described above) that treats odorous substances transported by a vehicle V, and detects the presence or absence of a vehicle V that has entered the facility 100 (receiving room 101) using a detection unit 2, and based on this detection result, the control unit 3 controls the operation of a ventilation fan 4 installed in the facility 100 (receiving room 101). Each component of the ventilation system 1 in this embodiment will be described below.

[0025] The detection unit 2 detects the status of the facility 100 and performs a detection step of detecting whether or not a vehicle V is entering the facility 100. Here, the "presence or absence of a vehicle entering the facility" detected by the detection unit 2 does not only refer to whether or not there is a vehicle entering or leaving the facility 100, but also includes whether or not there is a vehicle at a specified position within the facility 100. The detection unit 2 in this embodiment may be any device that can detect the situation regarding the entry, exit, and stopping of a vehicle V within the facility 100, and examples include sensors (infrared sensors, photoelectric sensors, weight sensors, metal detection sensors, etc.) that detect when a vehicle V passes through or stops at a predetermined position within the facility 100, and imaging means that acquires image data within the facility 100. The detection results obtained by the detection unit 2 include, for example, the timing of vehicle V entering and exiting the receiving room 101, the timing when vehicle V stops at a predetermined position (working position) to deposit (move) odorous substances toward the treatment equipment 102, the timing when vehicle V moves (moves away) from the predetermined position (working position) after the movement of odorous substances from vehicle V is completed, as well as the time vehicle V stays in the receiving room 101, the time vehicle V stops at the predetermined position (working position) (the work time to move odorous substances from vehicle V toward the treatment equipment 102), and the number of vehicles V entering the receiving room 101.

[0026] Here, it is preferable that the detection unit 2 in this embodiment includes an imaging means. More specifically, it is preferable that the detection unit 2 uses a camera 21 equipped with a wide-angle lens (ultra-wide-angle lens), a thermal camera capable of detecting temperature distribution, or multiple cameras to view the entire floor surface of the receiving room 101. This makes it possible to perform wide-area detection more easily than detection using sensors, making it easier to improve detection accuracy (prevent vehicle V from being overlooked).

[0027] Furthermore, by including an imaging means in the detection unit 2, it becomes easier to distinguish between vehicles V transporting odorous substances and other objects (including workers, etc.) and to identify the characteristics of the vehicles V. In addition to preventing false detections, it also becomes easier for the control unit 3, described later, to control based on detection results other than the presence or absence of a vehicle. Here, when an imaging means is used as the detection unit 2, the details of the characteristics of the vehicle V that are identified include, for example, the type and size (height, overall length, maximum load capacity, etc.) of the vehicle V and the details of the cargo (type, load capacity, etc.). The details of the characteristics of the vehicle V can be obtained (identified) directly from image data captured by the imaging means, or, when loading odorous substances onto the vehicle V, various pieces of information relating to the vehicle V and the odorous substances to be loaded can be linked to the license plate of the vehicle V, and the information can be grasped (identified) by reading the license plate of the vehicle V with the imaging means.

[0028] The control unit 3 is for taking measures related to odor control and environmental maintenance in the facility 100, and for performing a control step of controlling the air volume of the ventilation fan 4 installed in the facility 100 (receiving room 101) based on the detection results obtained by the detection unit 2 described above. The control unit 3 may be directly connected to the detection unit 2 and the ventilation fan 4 by wiring or the like, or may be indirectly connected via a communication technique such as wireless.

[0029] The control of the air volume of the ventilation fan 4 by the control unit 3 will be described below by way of example. It should be noted that the flowcharts in the following description are merely examples of embodiments and are not intended to be limiting.

[0030] FIG. 2 shows a flowchart relating to the operation of the ventilation system 1, including the control steps performed by the control unit 3. First, during times when the facility 100 is not accepting vehicles V (such as at night) or when no vehicles V are entering the facility 100, the ventilation fan 4 is stopped or operates at a low air volume (low speed operation). In this case, the "low air volume" may refer to an air volume based on a predetermined index (predetermined value), or may refer to an air volume that is low as a relative value. Even when no vehicle V is entering the facility 100, odors may leak into the receiving room 101 due to odorous substances stored in equipment (such as the treatment equipment 102) within the facility 100. Therefore, it is preferable to operate the ventilation fan 4 without stopping it, but at an air volume that allows for ventilation of odors that have leaked into the receiving room 101 from other equipment within the facility 100.

[0031] Then, during the time period when the facility 100 is accepting the vehicle V, if the detection result obtained by the detection unit 2 regarding the presence or absence of the vehicle V entering the facility 100 indicates that the vehicle V has entered, i.e., that measures to deal with odors and maintain the environment in the facility 100 are necessary, the air volume of the ventilation fan 4 is increased (high-speed operation). In this case, high-speed operation refers to operation in which the ventilation fan 4 operates at a high air volume, and the "high air volume" may refer to an air volume based on a predetermined index (predetermined value), as with the above-mentioned "low air volume," or may refer to an air volume that is high as a relative value. Specific examples of the detection result by the detection unit 2 that is deemed to be "vehicle has entered" include the timing when the vehicle V passes through the entrance / exit of the receiving room 101, the timing when the vehicle V stops near the stop line L (work position) marked in the receiving room 101, and the timing when the vehicle V moves (away from) the stop line L. Furthermore, if an imaging means is used as the detection unit 2, the timing when the vehicle V enters the imaging range (field of view) of the imaging means (in other words, the timing when the presence of the vehicle V is recognized within the field of view of the imaging means) can also be considered to be "vehicle has entered."

[0032] Furthermore, when the detection result by the detection unit 2 is "vehicle intrusion", it is also preferable to control the air volume of the ventilation fan 4 based on a detection result other than "vehicle intrusion" by the detection unit 2. Note that this control is not essential and can be omitted.

[0033] Specific examples of the control of the air volume of the ventilation fan 4 based on detection results other than "vehicle intrusion" will be described below. For example, the air volume of the ventilation fan 4 may be controlled according to the residence time of the vehicle V in the receiving room 101 or the stop time of the vehicle V at a predetermined position (work position) (the work time for moving odorous substances from the vehicle V to the treatment equipment 102). That is, if the residence time or stop time of the vehicle V in the receiving room 101 exceeds a predetermined value, the air volume of the ventilation fan 4 is further increased, whereas if it falls below the predetermined value, the air volume of the ventilation fan 4 is reduced. Furthermore, the air volume of the ventilation fan 4 may be controlled according to the number of vehicles V entering the receiving room 101 as a result of detection by the detection unit 2. That is, as the number of vehicles V entering the receiving room 101 increases, the air volume of the ventilation fan 4 is increased, and when the number of vehicles V entering the receiving room 101 decreases, the air volume of the ventilation fan 4 is decreased.

[0034] Furthermore, the detection result obtained by the detection unit 2 may be the presence or absence of an object other than the vehicle V, particularly the presence or absence of a worker, and the air volume of the ventilation fan 4 may be controlled in accordance with this detection result. For example, if the detection result indicates the presence of a worker, the air volume of the ventilation fan 4 is increased regardless of whether the vehicle V has entered, thereby maintaining the working environment for the worker.

[0035] Furthermore, the detection unit 2 may obtain detection results relating to the characteristics of the vehicle V (for example, the type and size of the vehicle V, and the contents of the cargo), and control the air volume of the ventilation fan 4 according to these detection results. For example, if the size or load of the vehicle V exceeds a predetermined value, it may be determined that a higher level of odor control is required, and the air volume of the ventilation fan 4 may be further increased, while if it falls below the predetermined value, the air volume of the ventilation fan 4 may be reduced to prevent excessive control.

[0036] This makes it possible to ventilate just enough according to the situation (required level of odor control) inside the receiving room 101. In other words, when the vehicle V is entering the receiving room 101, the air volume (ventilation volume) of the ventilation fan 4 increases unilaterally, resulting in a state of ventilation that is more than necessary (excessive response). This improves the accuracy of air volume control of the ventilation fan, thereby enabling further power savings in driving the ventilation fan 4.

[0037] Then, when the detection unit 2 detects that no vehicle V has entered, i.e., that all vehicles V in the facility 100 (reception room 101) have exited, the airflow rate of the ventilation fan 4 may be immediately reduced; however, when a vehicle V that has entered the facility 100 completes the required work and exits, an odor may remain even after the vehicle V has exited. Therefore, as shown in Figure 2, it is preferable to continue operating the ventilation fan 4 at high speed even after a detection result indicating no vehicle has entered the facility, and then reduce the air volume of the ventilation fan 4 after a predetermined time has elapsed. This makes it possible to adequately deal with odors while suppressing excessive odor response and environmental maintenance in the facility 100. Furthermore, the air volume (operation) of the ventilation fan 4 at this time may be low-speed operation at a low air volume, or medium-speed operation (halfway between low-speed operation and high-speed operation) at a medium air volume between low and high air volumes.

[0038] Thereafter, the process returns to determining whether the facility 100 is in a suitable time zone for the vehicle V to enter, or whether the detection result by the detection unit 2 indicates that a vehicle has entered, and the above-described control content (control flow) is repeated.

[0039] The control unit 3 of this embodiment, when performing ventilation as a means for dealing with odors and maintaining the environment in the facility 100, grasps the situation within the facility 100 (such as the level of odor control required) and performs control based on this, thereby making it possible to prevent excessive responses to odors and maintaining the environment in the facility. Also, by controlling the air volume of the ventilation fan 4 as the object of control by the control unit 3 of this embodiment, it is possible to optimize energy consumption related to driving the ventilation fan 4, and ultimately to effectively achieve power savings related to the operation of the facility 100.

[0040] Furthermore, the ventilation system 1 in this embodiment preferably has a means for responding to the occurrence of an abnormality in the detection unit 2 in order to prevent a situation in which the countermeasures (ventilation) related to odor countermeasures and environmental maintenance in the facility 100 are not properly executed due to the occurrence of an abnormality in the detection unit 2. Specifically, in the air volume control of the ventilation fan 4 by the control unit 3, a control flow to be executed when an abnormality occurs in the detection unit 2 may be set in advance.

[0041] FIG. 3 shows another example of a flowchart relating to the operation of the ventilation system 1 including control steps by the control unit 3. First, during times when the facility 100 is not accepting vehicles V (such as at night), the ventilation fan 4 is stopped or operates at a low air volume (low speed operation) in the same manner as in the flowchart shown in FIG. Then, when it is determined that an abnormality has occurred in the detection unit 2 and the detection result of the detection unit 2 is not input to the control unit 3 (the detection result cannot be acquired by the detection unit 2), a timer is started within the control unit 3. Here, the occurrence of an abnormality in the detection unit 2 may be, for example, a malfunction of the camera 21 or a problem with the transmission of the detection result (data) between the detection unit 2 and the control unit 3. Next, after a predetermined time set by the timer has elapsed, the control unit 3 operates the ventilation fan 4 at high speed. This makes it possible to appropriately deal with odors and maintain the environment within the facility 100 even if a detection result cannot be obtained from the detection unit 2. It should be noted that there is little need to forcibly switch to high-speed operation in the case of a temporary malfunction (a state that can be immediately restored), such as a time lag occurring in the transmission of the detection result (data) of the detection unit 2. In other words, by starting the timer and waiting for a predetermined time, it becomes possible to make an appropriate judgment and take action in the event of an abnormality occurring in the detection unit 2. Therefore, the number of times on the timer should be set to between 20 seconds and 1 minute.

[0042] On the other hand, if it is determined that the detection result of the detection unit 2 has been input to the control unit 3 (the detection result of the detection unit 2 can be obtained), the control unit 3 proceeds with a control flow similar to the flowchart shown in Fig. 2. Note that Fig. 3 does not show that the air volume of the ventilation fan 4 is controlled based on detection results other than "vehicle intrusion" by the detection unit 2.

[0043] The operation control by the control unit 3 described above may include manual operation by an operator, but from the viewpoint of reducing the labor of the operator, it is preferable that the operation control be automatic. Specifically, the control unit 3 can be automatically controlled by using a computing device that uses a processor such as a CPU to execute programs necessary for acquiring and determining various information, and transmitting control signals related to air volume control (rotation speed control) of the ventilation fan 4.

[0044] The above-described embodiment shows an example of a ventilation system and a ventilation method. The ventilation system and ventilation method according to the present invention are not limited to the above-described embodiment, and the ventilation system and ventilation method according to the above-described embodiment may be modified within the scope of the gist of the claims.

[0045] For example, the ventilation system and ventilation method of this embodiment are applied to a facility that treats odorous substances transported by vehicles, but the cargo loaded on vehicles entering the facility is not limited to odorous substances. In other words, some of the vehicles entering the facility may be carrying cargo other than odorous substances. In this case, if the detection unit detects that the contents of the cargo are other than odorous substances, the control unit may not control the air volume of the ventilation fan. This makes it possible to prevent excessive response even when a vehicle carrying cargo that does not require odor response enters.

[0046] Furthermore, the ventilation system and ventilation method of this embodiment may further include an odor detection means (such as an odor sensor) that detects odors, and the control unit may control the air volume of the ventilation fan based on the detection results from the odor detection means in addition to the detection results from the detection unit. In this case, by combining the detection results from the detection unit and the detection results from the odor detection means, it is possible to grasp the trend in odor fluctuations, and if something is different from normal (for example, the odor increases before the vehicle stops at the work location, or the odor increases when the vehicle exits), it can be determined that an odorous substance is leaking from the vehicle, and it can also be used to evaluate whether or not a vehicle malfunction (poor maintenance) has occurred. [Industrial Applicability]

[0047] The ventilation system and ventilation method of the present invention are suitably used as a means for dealing with odors and maintaining the environment inside and outside the facility in a facility that treats odorous substances transported by vehicle. [Explanation of symbols]

[0048] 1 ventilation system, 2 detection unit, 21 camera, 3 control unit, 4 ventilation fan, 4a air intake, 4b exhaust 100 Facility, 101 Receiving room, 102 Processing equipment, 103 Input section D Deodorizing equipment, L Stop line, V Vehicle

Claims

1. A ventilation system in a facility that treats odorous substances transported by vehicles, a detection unit that detects whether or not a vehicle is entering the facility; A ventilation system comprising: a control unit that controls the air volume of a ventilation fan installed in the facility based on the detection result of the detection unit.

2. The ventilation system according to claim 1 , wherein the detection unit includes an imaging means.

3. 2. The ventilation system according to claim 1, wherein the control unit reduces the air volume of the ventilation fan after a predetermined time has elapsed since the detection unit detected the exit of the vehicle.

4. A ventilation method in a facility that treats odorous substances transported by vehicles, comprising: a detection step of detecting whether or not a vehicle is entering the facility; a control step of controlling the air volume of a ventilation fan installed in the facility based on the detection result of the detection step.

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