Fire sign detection system

Abstract

The present disclosure addresses the problem of accurately detecting a sign before a fire occurs. A fire sign detection system according to the present disclosure comprises a detection unit (12) and a holding member (13). The detection unit (12) detects the presence or absence of an abnormal gas. The holding member (13) holds the detection unit (12). A housing (200) in which a computer device (300) is housed has a first side wall (201) and a second side wall (202). The first side wall (201) passes cold air flowing into the housing (200) from a blowout port. The second side wall (202) is aligned with the first side wall (201) in one direction, and allows hot air that has passed through the computer device (300) to pass toward a suction port. The holding member (13) is attached to the second side wall (202) in a state of being inclined with respect to the second side wall (202) in the housing (200).

Description

Fire Prediction and Detection System

[0001] The present disclosure generally relates to a fire warning detection system, and more particularly to a fire warning detection system that detects warning signs of a fire that may occur in a data center.

[0002] Patent Document 1 describes a monitoring system that monitors the state of a target space. The monitoring system described in Patent Document 1 includes a first acquisition unit, a second acquisition unit, and a determination unit. The first acquisition unit acquires environmental information related to the environment of the target space. The second acquisition unit acquires power information related to the power of devices placed in the target space. The determination unit determines whether or not an abnormality (e.g., a fire) has occurred in the target space based on the environmental information and the power information.

[0003] International Publication No. 2022 / 004312

[0004] The monitoring system described in Patent Document 1 can detect a fire that has broken out in a target space, but cannot detect signs of a fire before it breaks out.

[0005] Recently, systems have been provided that are capable of detecting signs of a fire before it occurs. It is desirable for such systems to accurately detect signs of a fire before it occurs.

[0006] An object of the present disclosure is to provide a fire sign detection system that can accurately detect signs of a fire before it occurs.

[0007] A fire warning detection system according to one aspect of the present disclosure is a fire warning detection system that detects warning signs of a potential fire in a data center. The data center has an airflow circulation circuit that includes an air outlet on the floor of the data center and an air inlet on the ceiling of the data center. The airflow circulation circuit supplies cool air from the air outlet from at least one of below and to the side of computer equipment housed in a housing installed in the data center, and guides hot air that has passed through the computer equipment to the air inlet. The fire warning detection system includes a detection unit and a holding member. The detection unit detects the presence or absence of abnormal gas associated with at least one of melting and ignition in insulated wires connected to the computer equipment and in at least one of electronic components that constitute the computer equipment. The holding member holds the detection unit. The housing has a first side wall and a second side wall. The first side wall allows the cool air flowing into the housing from the air outlet to pass through. The second side wall is aligned with the first side wall in one direction and allows the hot air that has passed through the computer device to pass toward the air inlet. The holding member is attached to the second side wall within the housing in a state inclined relative to the second side wall.

[0008] FIG. 1 is a block diagram of a fire sign detection system according to a first embodiment. FIG. 2 is a schematic diagram of a data center to which the above fire sign detection system is applied. FIG. 3 is a schematic diagram showing an example of an analysis result by an analysis unit in the above fire sign detection system. FIG. 4 is a schematic diagram showing an installation state of a detection unit in the above fire sign detection system. FIG. 5 is a flowchart of a fire sign detection method executed by the above fire sign detection system. FIG. 6 is a schematic diagram showing an installation state of a detection unit in a fire sign detection system according to a second embodiment. FIG. 7 is a schematic diagram showing an installation state of a detection unit in a fire sign detection system according to a third embodiment.

[0009] Hereinafter, fire warning detection systems according to embodiments 1 to 3 will be described with reference to the drawings. The drawings referred to in the following embodiments 1 to 3 are schematic diagrams, and the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensions, and the ratios of sizes and thicknesses between the components do not necessarily reflect the actual dimensional ratios.

[0010] First Embodiment (1) Overview First, an overview of a fire sign detection system 1 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG.

[0011] The fire warning detection system 1 according to the first embodiment is a system that detects warning signs of a fire that may occur in, for example, a data center 100. In the present disclosure, the data center 100 includes a server room in which a plurality of server computers and related devices (e.g., hubs) are installed. In the present disclosure, warning signs of a fire that may occur in the data center 100 include abnormal gas generation within the data center 100 due to at least one of melting and ignition of a covered cable FS (see FIG. 3 ) connected to a computer device 300, which will be described later. That is, the fire warning detection system 1 according to the first embodiment detects abnormal gas generated within the data center 100 using a first detection unit 12A (detection unit 12), which will be described later, and detects (determines) whether or not there are warning signs of a fire that may occur in the data center 100 based on the detection result of the first detection unit 12A.

[0012] In this embodiment, as shown in FIG. 2 , multiple enclosures (racks) 200 are installed in a data center 100. The multiple enclosures 200 are arranged in a matrix within the data center 100 along a first direction (the horizontal direction in FIG. 2 ) and a second direction (the normal direction to the paper surface in FIG. 2 ) perpendicular to the first direction. More specifically, the multiple enclosures 200 are arranged in two or more rows (two rows in the illustrated example) along the first direction within the data center 100, with two or more enclosures in each row arranged along the second direction. Each enclosure 200 houses multiple computer devices 300 (five in the illustrated example). The multiple computer devices 300 are arranged at equal intervals within the enclosure 200 along a third direction (the vertical direction in FIG. 2 ) perpendicular to both the first and second directions. The computer devices 300 include server computers and hubs, which are related devices of the server computers. Each computer device 300 is connected to a covered wire FS for power supply (see FIG. 3) and a covered wire FS for communication.

[0013] 1 and 2 , in a fire warning detection system 1 according to the first embodiment, an airflow circulation cycle C1 is formed in a data center 100, the airflow circulation cycle C1 including an air outlet 101 provided on a floor surface F1 of the data center 100 and an air inlet 102 provided on a ceiling surface W1 of the data center 100. The airflow circulation cycle C1 supplies cool air from the air outlet 101 to at least one of the lower and lateral sides of computer equipment 300 housed in a housing 200 installed in the data center 100, and guides hot air that has passed through the computer equipment 300 to the air inlet 102.

[0014] The fire warning detection system 1 includes a detection unit 12 and a holding member 13 (see FIG. 4 ). The detection unit 12 detects the presence or absence of abnormal gas associated with at least one of melting and ignition in a covered wire FS (see FIG. 3 ) connected to the computer device 300 and / or in an electronic component constituting the computer device 300. The holding member 13 holds the detection unit 12. The housing 200 has a first side wall 201 (see FIG. 4 ) and a second side wall 202 (see FIG. 4 ). The first side wall 201 allows cool air flowing into the housing 200 from the air outlet 101 to pass through. The second side wall 202 is aligned with the first side wall 201 in one direction (the left-right direction in FIG. 4 ) and allows hot air that has passed through the computer device 300 to pass toward the air inlet 102. The holding member 13 is attached to the second side wall 202 in the housing 200 in a state inclined relative to the second side wall 202 (see FIG. 4).

[0015] In the fire warning detection system 1 according to the first embodiment, the holding member 13 is attached to the second side wall 202 in a state inclined relative to the second side wall 202 within the housing 200. This increases the amount of airflow AC1 flowing into the detection unit 12 compared to when the holding member 13 is attached perpendicular to the second side wall 202, and as a result, the amount of abnormal gas contained in the airflow AC1 also increases, thereby improving the detection accuracy of the detection unit 12. In other words, the fire warning detection system 1 according to the first embodiment makes it possible to accurately detect warning signs of a fire before they occur.

[0016] (2) Details Next, each component of the fire sign detection system 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG.

[0017] As shown in Fig. 1 , a fire warning detection system 1 according to the first embodiment is connected to a management system 2 and configured to communicate with the management system 2. The management system 2 is also connected to an external system 3 via a network NT such as the Internet and configured to communicate with the external system 3. The management system 2 is, for example, a management system installed in a management room that manages a data center 100. The external system 3 is, for example, a system owned by a telecommunications carrier that uses the data center 100. A computer device 300 owned by the telecommunications carrier is installed within the data center 100, and the external system 3 is configured to communicate with the computer device 300 via the network NT.

[0018] As described above, the fire warning detection system 1 according to the first embodiment is a system that detects warning signs of a fire that may occur in a data center 100. As shown in FIG. 2 , the data center 100 has an airflow circulation cycle C1 formed therein, which includes two air outlets 101 provided on a floor F1 of the data center 100 and one air inlet 102 provided on a ceiling W1 of the data center 100. The airflow circulation cycle C1 supplies cool air from the air outlets 101 to at least one of the lower and lateral sides of computer equipment 300 housed in a housing 200 installed in the data center 100, and guides hot air that has passed through the computer equipment 300 to the air inlet 102. The data center 100 is formed in the shape of a rectangular parallelepiped having a depth along the normal direction to the plane of FIG. 2 . Furthermore, an air conditioning system 103 for generating the airflow circulation cycle C1 is provided within the data center 100. The air conditioning equipment 103 converts the hot air drawn in through the air inlet 102 into cool air and supplies the converted cool air into the data center 100 through the air outlet 101. In Fig. 2, the arrows with dots represent the hot air after passing through the computer equipment 300, and the arrows without dots represent the cool air before passing through the computer equipment 300.

[0019] The housing 200 is formed in a rectangular parallelepiped shape large enough to accommodate multiple (five) computer devices 300. As shown in FIG. 4 , the housing 200 has a first side wall 201 and a second side wall 202. The first side wall 201 allows cool air flowing into the housing 200 from the air outlet 101 to pass through. The second side wall 202 is aligned with the first side wall 201 in one direction (the left-right direction in FIG. 4 ) and allows hot air that has passed through the computer devices 300 to pass toward the air inlet 102. Each of the first side wall 201 and the second side wall 202 is made of punched metal with multiple holes. This allows the flow of airflow AC1 in the airflow circulation cycle C1 to be improved.

[0020] 1 , the fire sign detection system 1 includes a control unit 11, a first detection unit 12A, a second detection unit 12B, an angle adjustment mechanism 130, an input unit 14, a communication unit 15, and a memory unit 16. However, the control unit 11, the second detection unit 12B, the angle adjustment mechanism 130, the input unit 14, the communication unit 15, and the memory unit 16 are not essential components of the fire sign detection system 1. In other words, all or some of the control unit 11, the second detection unit 12B, the angle adjustment mechanism 130, the input unit 14, the communication unit 15, and the memory unit 16 do not have to be included as components of the fire sign detection system 1.

[0021] (2.1) Control Unit The control unit 11 can be realized, for example, by a computer system having one or more processors and one or more memories. That is, the control unit 11 functions as the control unit 11 (including the acquisition unit 111, analysis unit 112, estimation unit 113, and determination unit 114 described below) by having the one or more processors execute a program recorded in one or more memories of the computer system. Here, the program is pre-recorded in the memory of the computer system, but it may also be provided via a telecommunications line such as the Internet, or may be recorded on a non-transitory recording medium such as a memory card and provided.

[0022] The control unit 11 performs overall control of the fire warning detection system 1. As shown in FIG. 1 , the control unit 11 is electrically connected to each of the first detection unit 12A, the second detection unit 12B, the angle adjustment mechanism 130, the input unit 14, the communication unit 15, and the memory unit 16. The control unit 11 acquires first detection information including the detection result of the first detection unit 12A from the first detection unit 12A. The control unit 11 acquires second detection information including the detection result of the second detection unit 12B from the second detection unit 12B. The control unit 11 controls the angle adjustment mechanism 130 to adjust a first angle α1 (see FIG. 4 ) of a holding member 13 (described below) (see FIG. 4 ). As described below, the first angle α1 is the angle formed between a second side wall 202 of the housing 200 and the holding member 13, and is the mounting angle of the holding member 13 with respect to the second side wall 202 (hereinafter also referred to as the “mounting angle α1”).

[0023] The control unit 11 also acquires input information received by the input unit 14. The control unit 11 controls the communication unit 15 to cause the communication unit 15 to perform wired communication with the management system 2. The control unit 11 controls the storage unit 16 to store information in the storage unit 16 and read information from the storage unit 16.

[0024] As shown in FIG. 1 , the control unit 11 includes an acquisition unit 111 , an analysis unit 112 , an estimation unit 113 , and a determination unit 114 .

[0025] The acquisition unit 111 acquires first information and second information. The first information is information relating to the structure of the data center 100 and the structure of the casing 200. The information relating to the structure of the data center 100 includes, for example, the shape and size (volume) of the data center 100. Furthermore, the information relating to the structure of the casing 200 includes, for example, the shape and size (internal volume) of the casing 200. The first information is input using the input unit 14. In other words, the acquisition unit 111 acquires the input information received by the input unit 14 as the first information.

[0026] The second information is information related to the airflow AC1 in the airflow circulation cycle C1. The second information includes, for example, the flow velocity and temperature of the airflow AC1 from the air outlet 101, the amount of airflow AC1 suctioned into the air inlet 102, the flow velocity of the airflow AC1 into the first side wall 201 of the housing 200, and the flow velocity of the airflow AC1 from the second side wall 202 of the housing 200. The flow velocity of the airflow AC1 is measured, for example, by the second detection unit 12B. The temperature of the airflow AC1 is measured, for example, by a temperature sensor. The flow rate of the airflow AC1 is measured, for example, by a flow rate sensor. The acquisition unit 111 acquires the measurement results of the second detection unit 12B, the temperature sensor, and the flow rate sensor as the second information.

[0027] The analysis unit 112 analyzes the flow of the airflow AC1 based on the first information and the second information acquired by the acquisition unit 111. The airflow AC1 contains abnormal gas associated with at least one of melting and ignition of the covered wire FS (see FIG. 3 ) connected to the computer device 300 housed in the housing 200. Melting and ignition of the covered wire FS can occur when the load on the computer device 300 increases and the amount of data passing through the covered wire FS increases. FIG. 3 is a schematic diagram illustrating an example of the analysis results of the airflow AC1 analyzed by the analysis unit 112. The example in FIG. 3 illustrates a case in which abnormal gas is being generated from a covered wire FS, a simulated ignition source, connected to the lowest computer device 300 among the five computer devices 300 housed in the left housing 200. Note that analysis results of the airflow AC1 can be similarly obtained for computer devices 300 other than the lowest computer device 300.

[0028] The airflow circulation cycle C1 changes depending on the operating status of the air conditioning equipment 103 installed in the data center 100, the position of the computer device 300 within the enclosure 200, etc. Therefore, it is preferable that the analysis unit 112 measure the flow of the airflow AC1 of the airflow circulation cycle C1 over a certain period of time (for example, one hour).

[0029] The estimation unit 113 estimates at least one of the position Po1 and the number of first detection units 12A (detection units 12) within the housing 200 based on the analysis result (see FIG. 3 ) of the analysis unit 112. In this embodiment, the estimation unit 113 estimates both the position Po1 and the number of first detection units 12A within the housing 200. In the example of FIG. 3 , the estimation unit 113 estimates a first position Po11 and a second position Po12 as the position Po1 of the first detection unit 12A within the housing 200. In addition, the estimation unit 113 further estimates a third position Po13 as the position Po1 of the first detection unit 12A outside the housing 200. That is, the estimation unit 113 estimates a first position Po11 and a second position Po12 as the position Po1 of the first detection unit 12A within the housing 200, and also estimates the number of first detection units 12A (two in the example of FIG. 3 ) within the housing 200. Each of the first position Po11 and the second position Po12 is an attachment position of the first detection unit 12A on the second side wall 202 of the housing 200. Furthermore, the third position Po13 is an attachment position of the first detection unit 12A on the ceiling surface W1 of the data center 100. That is, in the example of FIG. 3 , two first detection units 12A need to be attached at the first position Po11 and the second position Po12 within the housing 200.

[0030] In addition to the positions Po1 and the number of first detectors 12A, the estimation unit 113 also estimates an attachment angle (first angle) α1 of the holding member 13 with respect to the second side wall 202 of the housing 200. Here, the holding member 13 is a member for attaching the first detector 12A to the housing 200, and as shown in FIG. 4 , is a plate-like member having a first surface 131 and a second surface 132 that face each other. The holding member 13 is located on the first side wall 201 side in one direction (the left-right direction in FIG. 4 ) and further has an end surface 133 that connects the first surface 131 and the second surface 132. As shown in FIG. 4 , the first detector 12A is held by the first surface 131 of the holding member 13, and is attached to the second side wall 202 of the housing 200 via the holding member 13. That is, the fire warning detection system 1 according to the first embodiment includes a holding member 13 that holds the first detection unit 12A (detection unit 12).

[0031] In this embodiment, the fire warning detection system 1 includes a second detection unit 12B. As will be described later, the second detection unit 12B is a sensor that detects the direction of the airflow AC1 within the housing 200. Therefore, the estimation unit 113 may further estimate the attachment angle α1 (see FIG. 4 ) of the holding member 13 with respect to the second side wall 202 of the housing 200 based on the detection result of the second detection unit 12B in addition to the analysis result of the analysis unit 112.

[0032] The determination unit 114 determines whether there are signs of a fire that may break out in the data center 100 based on the detection results of the first detection units 12A. In this embodiment, the fire sign detection system 1 includes multiple first detection units 12A. For this reason, it is preferable for the determination unit 114 to determine whether there are signs of a fire for each of all of the first detection units 12A, but in this case, the processing burden on the determination unit 114 increases. Therefore, the determination unit 114 may determine whether there are signs of a fire based on the detection result of the first detection unit 12A that detected the abnormal gas with the highest concentration among the multiple first detection units 12A. This makes it possible to determine whether there are signs of a fire while reducing the processing burden on the determination unit 114.

[0033] Here, assume that the multiple first detection units 12A correspond one-to-one to the multiple computer devices 300, and one of the multiple computer devices 300 is busy. In this case, a large amount of data passes through the covered wire FS (see FIG. 3 ) connected to the one computer device 300, which may cause the covered wire FS to heat up, potentially resulting in at least one of melting and catching fire. Therefore, in this case, it is preferable that the determination unit 114 determine whether there are signs of a fire based on the detection result of one of the multiple first detection units 12A that corresponds to the one computer device 300.

[0034] (2.2) First Detector The first detector 12A is, for example, a gas sensor that converts the concentration of a detected gas into an electrical signal. The first detector 12A detects the presence or absence of an abnormal gas associated with at least one of melting and ignition of the coated wire FS connected to the computer device 300. The abnormal gas includes, for example, at least one of hydrogen chloride gas, ammonia gas, carbon monoxide gas, and formaldehyde. In this embodiment, the first detector 12A corresponds to the detector 12. The first detector 12A may be an electrochemical gas sensor or an infrared gas sensor.

[0035] (2.3) Second Detector The second detector 12B is a wind direction sensor that detects the direction of the airflow AC1 in the airflow circulation cycle C1, unlike the first detector 12A. The second detector 12B detects, for example, the ascending angle of the airflow AC1 relative to the second side wall 202 of the housing 200.

[0036] (2.4) Angle Adjustment Mechanism The holding member 13 has an angle adjustment mechanism 130. The angle adjustment mechanism 130 adjusts the first angle (mounting angle) α1 of the holding member 13 in accordance with input information from outside. The input information is information input using the input unit 14, and includes, for example, angle information of the holding member 13 with respect to the second side wall 202 of the housing 200. The angle adjustment mechanism 130 can adjust the first angle α1 of the holding member 13 in increments of 1 degree, for example.

[0037] As described above, the fire warning detection system 1 according to the first embodiment includes the second detector 12B that detects the direction of the airflow AC1 in the airflow circulation cycle C1. Therefore, it is preferable that the angle adjustment mechanism 130 further adjusts the first angle α1 based on the detection result of the second detector 12B in addition to the input information.

[0038] Assume that the multiple first detectors 12A correspond one-to-one to the multiple computer devices 300, and one of the multiple computer devices 300 is busy. In this case, there is a possibility that the insulated wire FS (see FIG. 3 ) connected to the one computer device 300 may melt or catch fire. Therefore, in this case, it is preferable that the angle adjustment mechanism 130 readjusts the first angle (mounting angle) α1 of the holding member 13 holding the one first detector 12A. Note that the input information in this case corresponds to one of the multiple first detectors 12A, and includes, for example, angle information of the holding member 13 holding the one first detector 12A relative to the second side wall 202 of the housing 200.

[0039] (2.5) Input Unit The input unit 14 accepts input information from outside. More specifically, the input unit 14 includes, for example, an input interface that accepts input information from the administrator of the data center 100. As described above, the input information includes at least one of the first information and angle information of the holding member 13. The input unit 14 has, for example, multiple push buttons and a numeric keypad. Therefore, the administrator of the data center 100 inputs the above input information using the multiple push buttons and the numeric keypad.

[0040] (2.6) Communication Unit The communication unit 15 includes a communication interface for communicating with the management system 2. The communication unit 15 performs wired communication with the management system 2, for example. Through communication with the management system 2, the communication unit 15 transmits to the management system 2 a communication signal including the first angle (mounting angle) α1 of each holding member 13, a communication signal including the detection results of each first detection unit 12A, and a communication signal including the detection results of each second detection unit 12B. Furthermore, through communication with the management system 2, the communication unit 15 transmits to the management system 2 a communication signal including the analysis result of the analysis unit 112, a communication signal including the estimation result of the estimation unit 113, and a communication signal including the determination result of the determination unit 114. Note that communication between the communication unit 15 and the management system 2 is not limited to wired communication, and may be wireless communication.

[0041] (2.7) Storage Unit The storage unit 16 is, for example, a memory such as a ROM (Read Only Memory), a RAM (Random Access Memory), or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 16 stores, for example, the first angle (mounting angle) α1 of each holding member 13, the detection results of each first detector 12A, and the detection results of each second detector 12B. The storage unit 16 also stores, for example, the analysis results of the analysis unit 112, the estimation results of the estimation unit 113, and the determination results of the determination unit 114.

[0042] (3) Installation State of the First Detector Next, the installation state of the first detector 12A will be described with reference to FIG. 4. As described above, FIG. 4 is a schematic diagram showing the installation state of the first detector 12A. In the example of FIG. 4, three of the five computer devices 300 housed in the housing 200 are illustrated. In addition, in the example of FIG. 4, only the first detector 12A and the holding member 13 corresponding to the computer device 300 located in the middle of the three computer devices 300 lined up vertically are illustrated. Each computer device 300 is placed on a support base 203 extending from the first side wall 201 toward the second side wall 202 of the housing 200 (see FIG. 4).

[0043] 4 , the holding member 13 is attached to the second side wall 202 of the housing 200 within the housing 200. More specifically, the holding member 13 is attached to the second side wall 202 within the housing 200 in a state inclined relative to the second side wall 202.

[0044] As shown in FIG. 4 , the first detection unit 12A has a base portion 121 and a head portion 122. The base portion 121 is the portion of the first detection unit 12A that is attached to the holding member 13. The head portion 122 has a plurality of inlets 123 (only three are shown in FIG. 4 ) and is the portion that is attached to the base portion 121. Each of the plurality of inlets 123 is a portion through which the airflow AC1 flows in. In other words, the first detection unit 12A has the inlet 123 through which the airflow AC1 in the airflow circulation cycle C1 flows in. As shown in FIG. 4 , the first detection unit 12A is held by the holding member 13 by attaching the base portion 121 to the holding member 13.

[0045] Here, assume that the first angle formed between the second side wall 202 of the housing 200 and the holding member 13 is α1, and the second angle formed between the direction of the airflow AC1 passing through the first detection unit 12A held by the holding member 13 and the second side wall 202 is β1. In this case, the first angle α1 and the second angle β1 preferably satisfy 0 < α1 and α1 ≦ β1. Furthermore, it is more preferable that the first angle α1 and the second angle β1 further satisfy β1 / 2 ≦ α1. When the first angle α1 and the second angle β1 satisfy the above-described relationship, the amount of the airflow AC1 flowing in through the inlet 123 increases, and accordingly, the amount of abnormal gas flowing in through the inlet 123 also increases, thereby improving the detection accuracy of the first detection unit 12A. As a result, it is possible to accurately detect signs of a fire before they occur.

[0046] (4) Fire Sign Detection Method Next, a fire sign detection method according to the first embodiment will be described with reference to Fig. 5. The fire sign detection method according to the first embodiment is realized, for example, by the above-described fire sign detection system 1.

[0047] The fire warning detection method according to the first embodiment is a fire warning detection method for detecting warning signs of a fire that may occur in a data center 100. The data center 100 has an airflow circulation cycle C1 formed therein, the airflow circulation cycle C1 including an air outlet 101 provided on a floor F1 of the data center 100 and an air inlet 102 provided on a ceiling W1 of the data center 100. The airflow circulation cycle C1 supplies cool air from the air outlet 101 to at least one of below and to the side of computer equipment 300 housed in a housing 200 installed in the data center 100, and guides hot air that has passed through the computer equipment 300 to the air inlet 102. The fire warning detection method includes an acquisition step ST1, an analysis step ST2, and an estimation step ST3. In the acquisition step ST1, first information is acquired, which is information about the structure of the data center 100 and the structure of the housing 200, and second information is acquired, which is information about an airflow AC1 in the airflow circulation cycle C1. In the analysis step ST2, based on the first information and the second information acquired in the acquisition step ST1, the flow (behavior) of the airflow AC1 containing the abnormal gas associated with at least one of melting and ignition in the covered wire FS (see FIG. 3 ) connected to the computer device 300 and / or the electronic components constituting the computer device 300 is analyzed. In the estimation step ST3, based on the analysis result of the analysis step ST2, at least one of the positions Po1 and the number of first detection units 12A (detection units 12) that detect the presence or absence of the abnormal gas within the housing 200 is estimated.

[0048] In the fire warning detection method according to the first embodiment, in the estimation step ST3, the positions Po1 and the number of first detection units 12A are estimated based on the analysis results of the analysis step ST2. Therefore, by disposing the first detection units 12A at the positions Po1 estimated in the estimation step ST3, it is possible to improve the detection accuracy of the first detection units 12A, and as a result, it is possible to accurately detect warning signs of a fire before they occur.

[0049] Fig. 5 is a flowchart showing a fire sign detection method executed by the fire sign detection system 1 according to embodiment 1. The fire sign detection method includes steps ST1 to ST3 shown in Fig. 5. Note that the flowchart shown in Fig. 5 is an example, and one or more steps may be included in addition to steps ST1 to ST3 shown in Fig. 5.

[0050] The fire sign detection method will be described in more detail below.

[0051] First, the fire sign detection system 1 executes an acquisition step ST1. More specifically, the acquisition unit 111 of the fire sign detection system 1 acquires the first information and the second information described above in the acquisition step ST1.

[0052] Next, the fire warning detection system 1 executes an analysis step ST2. More specifically, in analysis step ST2, the analyzer 112 of the fire warning detection system 1 analyzes the flow of the airflow AC1 containing the abnormal gas based on the first information and the second information (see FIG. 3 ). The example of FIG. 3 shows the flow of the airflow AC1 passing through the lowermost computer device 300 of the five computer devices 300 lined up vertically within the housing 200, as described above.

[0053] Then, the fire precursor detection system 1 executes an estimation step ST3. More specifically, in estimation step ST3, the estimation unit 113 of the fire precursor detection system 1 estimates the position Po1 and the number of first detection units 12A within the housing 200 based on the analysis result of the analysis unit 112 (the analysis result of analysis step ST2). In the example of Fig. 3 , the estimation unit 113 estimates a first position Po11 and a second position Po12 as the position Po1 of the first detection unit 12A within the housing 200.

[0054] Here, it is preferable that the position Po1 of the first detection unit 12A in the housing 200 is a position that does not interfere with the cooling of the computer device 300 by the airflow AC1. This makes it possible to efficiently cool the computer device 300.

[0055] (5) Effects In the fire warning detection system 1 according to the first embodiment, the holding member 13 is attached to the second side wall 202 in a state inclined relative to the second side wall 202 within the housing 200. This increases the amount of airflow AC1 flowing into the first detection unit 12A (detection unit 12A) compared to when the holding member 13 is attached perpendicular to the second side wall 202. As a result, the amount of abnormal gas contained in the airflow AC1 also increases, thereby improving the detection accuracy of the first detection unit 12A. In other words, the fire warning detection system 1 according to the first embodiment makes it possible to accurately detect warning signs of a fire before they occur.

[0056] Furthermore, in the fire warning detection system 1 according to the first embodiment, the first angle α1 and the second angle β1 satisfy 0<α1 and α1≦β1. This further increases the amount of airflow AC1 flowing into the first detection unit 12A, and as a result, the amount of abnormal gas contained in the airflow AC1 also increases, making it possible to further improve the detection accuracy of the first detection unit 12A.

[0057] Furthermore, in the fire warning detection system 1 according to the first embodiment, the first angle α1 and the second angle β1 further satisfy β1 / 2≦α1, which further increases the amount of airflow AC1 flowing into the first detection unit 12A, and as a result, the amount of abnormal gas contained in the airflow AC1 also increases, thereby further improving the detection accuracy of the first detection unit 12A.

[0058] Furthermore, in the fire warning detection system 1 according to the first embodiment, the holding member 13 has an angle adjustment mechanism 130 that adjusts the first angle α1 of the holding member 13 in response to input information from the outside. This makes it possible to adjust the first angle α1 of the holding member 13 by remote control.

[0059] Furthermore, in the fire warning detection system 1 according to the first embodiment, the determination unit 114 determines whether or not there is a warning of a fire based on the detection result of one of the plurality of first detection units 12A. This makes it possible to quickly detect a warning of a fire, for example, when one computer device 300 corresponding to one first detection unit 12A is busy.

[0060] Furthermore, in the fire warning detection system 1 according to the first embodiment, the angle adjustment mechanism 130 further adjusts the first angle α1 of the holding member 13 based on the detection result of the second detection unit 12B, thereby improving the detection accuracy of the first detection unit 12A.

[0061] In the fire warning detection system 1 according to the first embodiment, the abnormal gas detected by the first detection unit 12A includes at least one of hydrogen chloride gas, ammonia gas, carbon monoxide gas, and formaldehyde gas, thereby improving the accuracy of detecting warning signs of a fire caused by at least one of dissolution and ignition of the covered wire FS (see FIG. 3).

[0062] Furthermore, in the fire warning detection system 1 according to the first embodiment, the determination unit 114 determines whether or not there is a warning sign of a fire based on the detection result of the first detection unit 12A that detected the abnormal gas with the highest concentration among the plurality of first detection units 12A. This makes it possible to determine whether or not there is a warning sign of a fire while reducing the processing load on the determination unit 114.

[0063] In the fire warning detection system 1 according to the first embodiment, the first side wall 201 and the second side wall 202 of the housing 200 are each made of a punched metal having a plurality of holes, which makes it possible to improve the flow of the airflow AC1 in the airflow circulation cycle C1.

[0064] Furthermore, in the fire warning detection system 1 according to the first embodiment, the position Po1 of the first detection unit 12A within the housing 200 includes a position that does not interfere with the cooling of the computer device 300 by the airflow AC1. This allows the computer device 300 to be cooled efficiently.

[0065] (6) Modifications Embodiment 1 is merely one of various embodiments of the present disclosure. Various modifications to embodiment 1 are possible depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, functions similar to those of the fire sign detection system 1 according to embodiment 1 may be embodied in the above-described fire sign detection method, (computer) program, or non-transitory recording medium on which the program is recorded. A program according to one aspect is a program for causing one or more processors to execute the above-described fire sign detection method. Such a program makes it possible to accurately detect signs of a fire before they occur.

[0066] Below, modifications of the first embodiment are listed. The modifications described below can be applied in appropriate combinations.

[0067] The entity executing the fire warning detection system 1 or the fire warning detection method of the present disclosure includes a computer system. The computer system is primarily composed of a processor and memory as hardware. The processor executes a program stored in the memory of the computer system to realize the functions of the entity executing the fire warning detection system 1 or the fire warning detection method of the present disclosure. The program may be pre-recorded in the memory of the computer system, provided via a telecommunications line, or provided by being recorded on a non-transitory recording medium readable by the computer system, such as a memory card, optical disk, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integration (VLSI), or ultra-large-scale integration (ULSI). Furthermore, a field-programmable gate array (FPGA), which is programmed after the LSI is manufactured, or a logic device capable of reconfiguring the connections within the LSI or the circuit partitions within the LSI, can also be employed as a processor. Multiple electronic circuits may be integrated into a single chip or distributed across multiple chips. Multiple chips may be integrated into a single device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits, including a semiconductor integrated circuit or a large-scale integrated circuit.

[0068] Furthermore, it is not essential for the fire warning detection system 1 that multiple functions are concentrated in one housing, and the components of the fire warning detection system 1 may be distributed across multiple housings. Furthermore, at least some of the functions of the fire warning detection system 1, for example, the functions of the control unit 11, may be realized by the cloud (cloud computing) or the like.

[0069] Conversely, in the first embodiment, at least some of the functions of the fire warning detection system 1 that are distributed among multiple devices may be integrated into a single housing. For example, some of the functions of the fire warning detection system 1 that are distributed between the first detection unit 12A and the second detection unit 12B may be integrated into a single housing.

[0070] In the first embodiment, the estimation unit 113 estimates both the positions Po1 and the number of first detection units 12A in the housing 200. In contrast, the estimation unit 113 may estimate only the number of first detection units 12A in the housing 200.

[0071] In the first embodiment, the first detection unit 12A detects the presence or absence of abnormal gas associated with at least one of melting and ignition of the covered wire FS connected to the computer device 300. Alternatively, the first detection unit 12A may detect the presence or absence of abnormal gas associated with at least one of melting and ignition of an electronic component constituting the computer device 300. Furthermore, the first detection unit 12A may detect both the presence or absence of abnormal gas associated with at least one of melting and ignition of the covered wire FS and the presence or absence of abnormal gas associated with at least one of melting and ignition of the electronic component.

[0072] In the first embodiment, the determination unit 114 determines whether or not there are signs of a fire based on the detection result of the first detection unit 12A that detected the abnormal gas with the highest concentration among the multiple first detection units 12A. Here, since the balance of the concentrations of the generated abnormal gases tends to vary depending on the material being heated, the determination unit 114 may determine whether or not there are signs of a fire based on, for example, at least one of a combination of multiple abnormal gases generated when the covered wire FS burns and a combination of multiple abnormal gases generated when the electronic component burns. Alternatively, the determination unit 114 may determine whether or not there are signs of a fire based on the concentration occupancy ratio of each of the multiple abnormal gases.

[0073] (Embodiment 2) A fire sign detection system 1 according to embodiment 2 will be described with reference to Fig. 6. In the fire sign detection system 1 according to embodiment 2, components similar to those in the fire sign detection system 1 according to embodiment 1 (see Figs. 1, 2, and 4) are denoted by the same reference numerals, and descriptions thereof will be omitted.

[0074] The fire warning detection system 1 according to the second embodiment differs from the fire warning detection system 1 according to the first embodiment in that the first detection unit 12A is movable relative to the holding member 13.

[0075] In the fire warning detection system 1 according to the second embodiment, as shown in FIG. 6 , the first detection unit 12A includes only a head unit 122. The head unit 122 is provided with a plurality of inlets 123. The head unit 122 is movable along a first surface 131 of the holding member 13. In the example shown in FIG. 6 , the head unit 122 of the first detection unit 12A is held by the holding member 13 so that the leftmost inlet 123 among the plurality of inlets 123 is located to the left of the end surface 133 of the holding member 13. That is, in the fire warning detection system 1 according to the second embodiment, the first detection unit 12A is held by the holding member 13 so that the inlet 123 is located closer to the first side wall 201 (leftward) than the end surface 133 of the holding member 13 in one direction (the left-right direction in FIG. 6 ). This reduces the effects of turbulence in the airflow AC1. Note that the one direction is the direction in which the first side wall 201 and the second side wall 202 of the housing 200 are aligned.

[0076] Like the fire sign detection system 1 according to the first embodiment, the fire sign detection system 1 according to the second embodiment can also accurately detect signs of a fire before it occurs.

[0077] The first detection unit 12A may be held by the holding member 13 so that the leftmost inlet 123 among the plurality of inlets 123 is flush with the end surface 133 of the holding member 13 .

[0078] Furthermore, the various configurations described in the second embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first embodiment.

[0079] (Embodiment 3) A fire sign detection system 1 according to embodiment 3 will be described with reference to Fig. 7. In the fire sign detection system 1 according to embodiment 3, components similar to those in the fire sign detection system 1 according to embodiment 1 (see Figs. 1, 2, and 4) are denoted by the same reference numerals, and descriptions thereof will be omitted.

[0080] The fire precursor detection system 1 of the third embodiment differs from the fire precursor detection system 1 of the first embodiment in that the first detection unit 12A has a first inlet 123A and a second inlet 123B.

[0081] In the fire warning detection system 1 according to the third embodiment, as shown in FIG. 7 , the first detection unit 12A includes only a head unit 122. The head unit 122 is provided with a plurality of inlets 123A and 123B. Of the plurality of inlets 123A and 123B, the first inlet 123A is provided in a first portion of the head unit 122 that is located on the first surface 131 side of the holding member 13. Furthermore, of the plurality of inlets 123A and 123B, the second inlet 123B is provided in a second portion of the head unit 122 that is located on the second surface 132 side of the holding member 13. That is, the first detection unit 12A includes the first inlet 123A and the second inlet 123B through which the airflow AC1 flows. The first inlet 123A is located on the first surface 131 side in the thickness direction of the holding member 13, and the second inlet 123B is located on the second surface 132 side in the thickness direction of the holding member 13. In this case, it is preferable that the first detection unit 12A detects the presence or absence of abnormal gas based on both the airflow AC1 flowing in from the first inlet 123A and the airflow AC1 flowing in from the second inlet 123B. This makes it possible to improve the detection accuracy of the first detection unit 12A compared to when the first detection unit 12A detects the presence or absence of abnormal gas based on the airflow AC1 flowing in from the first inlet 123A or the airflow AC1 flowing in from the second inlet 123B.

[0082] As described above, by providing a first inlet 123A on the first surface 131 side of the holding member 13 and a second inlet 123B on the second surface 132 side of the holding member 13, it is possible to reduce the effects of turbulence in the airflow AC1.

[0083] Furthermore, the fire precursor detection system 1 according to the third embodiment, like the fire precursor detection system 1 according to the first embodiment, is also capable of accurately detecting precursors of a fire before it occurs.

[0084] The various configurations described in the third embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first and second embodiments.

[0085] (Aspects) The present specification discloses the following aspects.

[0086] (Aspect 1) A fire warning detection system (1) according to a first aspect is a fire warning detection system (1) that detects warning signs of a fire that may occur in a data center (100). The data center (100) has an airflow circulation cycle (C1) formed therein, the airflow circulation cycle (C1) including an air outlet (101) provided on a floor (F1) of the data center (100) and an air inlet (102) provided on a ceiling (W1) of the data center (100). The airflow circulation cycle (C1) supplies cool air from the air outlet (101) to at least one of the lower and lateral sides of a computer device (300) housed in a housing (200) installed in the data center (100), and guides hot air that has passed through the computer device (300) to the air inlet (102). The fire warning detection system (1) includes a detection unit (12) and a holding member (13). The detection unit (12) detects the presence or absence of abnormal gas associated with at least one of melting and ignition in a coated wire (FS) connected to the computer device (300) and / or an electronic component constituting the computer device (300). The holding member (13) holds the detection unit (12). The housing (200) has a first side wall (201) and a second side wall (202). The first side wall (201) allows cool air flowing into the housing (200) from the air outlet (101) to pass through. The second side wall (202) is aligned with the first side wall (201) in one direction and allows hot air that has passed through the computer device (300) to pass toward the air inlet (102). The holding member (13) is attached to the second side wall (202) within the housing (200) in an inclined state relative to the second side wall (202).

[0087] According to this aspect, it is possible to accurately detect signs of a fire before it occurs.

[0088] In the fire warning detection system (1) according to the second aspect, in the first aspect, when a first angle, which is the angle between the holding member (13) and the second side wall (202), is defined as α1, and a second angle, which is the angle between the direction of the airflow (AC1) passing through the detection unit (12) held by the holding member (13) and the second side wall (202), is defined as β1, the first angle (α1) and the second angle (β1) satisfy 0 < α1 and α1 ≦ β1.

[0089] According to this aspect, the amount of airflow (AC1) flowing into the detection unit (12) is greater than when the first angle (α1) and the second angle (β1) do not satisfy the above conditions, and as a result, it becomes possible to accurately detect signs of a fire before they occur.

[0090] In the fire warning detection system (1) according to the third aspect, in the second aspect, the first angle (α1) and the second angle (β1) further satisfy β1 / 2≦α1.

[0091] According to this aspect, the amount of airflow (AC1) flowing into the detection unit (12) is further increased, and as a result, it becomes possible to more accurately detect signs of a fire before it occurs.

[0092] In the fire warning detection system (1) according to the fourth aspect, in the second or third aspect, the holding member (13) has an angle adjustment mechanism (130) that adjusts the first angle (α1) in response to input information from outside.

[0093] According to this aspect, the first angle (α1) can be adjusted by remote control from the outside.

[0094] A fire warning detection system (1) according to a fifth aspect is the fourth aspect, but includes a plurality of detection units (12). The plurality of detection units (12) correspond one-to-one to a plurality of computer devices (300). The input information includes information corresponding to one of the plurality of detection units (12). The angle adjustment mechanism (130) readjusts the first angle (α1) of the holding member (13) holding one of the detection units (12) in accordance with the input information. The fire warning detection system (1) further includes a determination unit (114). The determination unit (114) determines whether or not there is a warning sign of a fire based on the detection result of the one detection unit (12).

[0095] According to this aspect, it is possible to determine whether or not there are signs of a fire based on the detection result of one detection unit (12).

[0096] A fire warning detection system (1) according to a sixth aspect is the fourth aspect, further comprising a first detection unit (12A) and a second detection unit (12B) as detection units (12). Unlike the first detection unit (12A), the second detection unit (12B) detects the direction of the airflow (AC1) in the airflow circulation cycle (C1). The angle adjustment mechanism (130) further adjusts the first angle (α1) based on the detection result of the second detection unit (12B).

[0097] According to this aspect, by adjusting the first angle (α1) based on the detection result of the second detection unit (12B), it is possible to improve the detection accuracy of the detection unit (12).

[0098] A seventh aspect of the fire warning detection system (1) is any one of the first to sixth aspects, wherein the detection unit (12) has an inlet (123) through which an airflow (AC1) in the airflow circulation cycle (C1) flows in. The holding member (13) is plate-shaped and has a first surface (131) and a second surface (132) that face each other. The holding member (13) is located on the first side wall (201) side in one direction and further has an end surface (133) that connects the first surface (131) and the second surface (132). The detection unit (12) is held by the holding member (13) such that the inlet (123) is flush with the end surface (133) of the holding member (13) or is located closer to the first side wall (201) than the end surface (133).

[0099] According to this aspect, it is possible to reduce the influence of turbulence of the airflow (AC1).

[0100] In a fire warning detection system (1) according to an eighth aspect, in any one of the first to sixth aspects, the detection unit (12) has a first inlet (123A) and a second inlet (123B) through which the airflow (AC1) in the airflow circulation cycle (C1) flows in. The holding member (13) is plate-shaped and has a first surface (131) and a second surface (132) that face each other. The first inlet (123A) is disposed on the first surface (131) side in the thickness direction of the holding member (13). The second inlet (123B) is disposed on the second surface (132) side in the thickness direction of the holding member (13).

[0101] According to this aspect, it is possible to reduce the influence of turbulence of the airflow (AC1).

[0102] In the fire warning detection system (1) according to the ninth aspect, in the eighth aspect, the detection unit (12) detects the presence or absence of abnormal gas based on both the airflow (AC1) flowing in from the first inlet (123A) and the airflow (AC1) flowing in from the second inlet (123B).

[0103] According to this aspect, it is possible to improve the detection accuracy of the detection unit (12) compared to when the detection unit (12) detects the presence or absence of abnormal gas based on the airflow (AC1) flowing in from the first inlet (123A) or the airflow (AC1) flowing in from the second inlet (123B).

[0104] In the fire warning detection system (1) according to the tenth aspect, in any one of the first to ninth aspects, the abnormal gas includes at least one of hydrogen chloride gas, ammonia gas, carbon monoxide gas, and formaldehyde gas.

[0105] According to this aspect, it is possible to improve the accuracy of detecting signs of fire caused by melting or ignition of the covered wire (FS).

[0106] A fire sign detection system (1) according to an eleventh aspect is any one of the first to tenth aspects and includes a plurality of detection units (12). The fire sign detection system (1) further includes a determination unit (114). The determination unit (114) determines whether or not there are signs of a fire based on at least one of the detection result of the detection unit (12) that detected the abnormal gas with the highest concentration among the plurality of detection units (12) and the detection results of the plurality of abnormal gases by the detection units (12).

[0107] According to this aspect, it is possible to determine whether or not there are signs of a fire while reducing the processing load on the determination unit (114).

[0108] In the fire warning detection system (1) according to the twelfth aspect, in any one of the first to eleventh aspects, the first side wall (201) and the second side wall (202) are each made of punched metal having a plurality of holes.

[0109] This configuration makes it possible to improve the flow of the air current (AC1) in the air current circulation cycle (C1).

[0110] In the fire warning detection system (1) according to the thirteenth aspect, in any one of the first to twelfth aspects, the position of the detection unit (12) within the housing (200) includes a position that does not interfere with the cooling of the computer device (300) by the airflow (AC1) in the airflow circulation cycle (C1).

[0111] This configuration makes it possible to efficiently cool the computer device (300).

[0112] A fire warning detection system (1) according to a fourteenth aspect is any one of the first to thirteenth aspects, further comprising an acquisition unit (111), an analysis unit (112), and an estimation unit (113). The acquisition unit (111) acquires first information, which is information about the structure of the data center (100) and the structure of the housing (200), and second information, which is information about the airflow (AC1) in the airflow circulation cycle (C1). The analysis unit (112) analyzes the flow of the airflow (AC1) containing abnormal gas associated with at least one of melting and ignition in the covered wire (FS) connected to the computer device (300) and / or the electronic components constituting the computer device (300), based on the first information and second information acquired by the acquisition unit (111). The estimation unit (113) estimates at least one of the position (Po1) and the number of detection units (12) within the housing (200) based on the analysis results of the analysis unit (112).

[0113] According to this aspect, it is possible to accurately detect signs of a fire before it occurs.

[0114] In the fire warning detection system (1) according to the fifteenth aspect, in the fourteenth aspect, the estimation unit (113) further estimates a first angle (α1), which is the angle formed between the retaining member (13) and the second side wall (202).

[0115] According to this aspect, the amount of airflow (AC1) flowing into the detection unit (12) increases, and as a result, the detection accuracy of the detection unit (12) can be improved.

[0116] A fire warning detection system (1) according to a sixteenth aspect is the fifteenth aspect, further comprising a second detection unit (12B). The second detection unit (12B) detects the direction of the airflow (AC1), unlike the first detection unit (12A) that is the detection unit (12). The estimation unit (113) estimates the first angle (α1) based on the detection result of the second detection unit (12B).

[0117] According to this aspect, by estimating the first angle (α1) based on the detection result of the second detection unit (12B), it is possible to further improve the detection accuracy of the detection unit (12).

[0118] The configurations according to the second to sixteenth aspects are not essential for the fire warning detection system (1) and may be omitted as appropriate.

[0119] (Aspect 2) A fire precursor detection system (1) according to a first aspect is a fire precursor detection system (1) that detects precursors of a fire that may occur in a data center (100). The data center (100) has an airflow circulation cycle (C1) formed therein, the airflow circulation cycle (C1) including an air outlet (101) provided on a floor (F1) of the data center (100) and an air inlet (102) provided on a ceiling (W1) of the data center (100). The airflow circulation cycle (C1) supplies cool air from the air outlet (101) from at least one of below and to the side of a computer device (300) housed in a housing (200) installed in the data center (100), and guides hot air that has passed through the computer device (300) to the air inlet (102). The fire precursor detection system (1) includes an acquisition unit (111), an analysis unit (112), and an estimation unit (113). The acquisition unit (111) acquires first information, which is information about the structure of the data center (100) and the structure of the enclosure (200), and second information, which is information about the airflow (AC1) in the airflow circulation cycle (C1). The analysis unit (112) analyzes the flow of the airflow (AC1) containing abnormal gas associated with at least one of melting and ignition in the covered wires (FS) connected to the computer device (300) and / or the electronic components constituting the computer device (300), based on the first information and the second information acquired by the acquisition unit (111). The estimation unit (113) estimates at least one of the positions (Po1) and the number of detection units (12) that detect the presence or absence of abnormal gas within the enclosure (200) based on the analysis results of the analysis unit (112).

[0120] According to this aspect, it is possible to accurately detect signs of a fire before it occurs.

[0121] In the fire warning detection system (1) according to the second aspect, in the first aspect, the position (Po1) of the detection unit (12) within the housing (200) includes a position that does not interfere with the cooling of the computer device (300) by the airflow (AC1).

[0122] According to this aspect, it is possible to efficiently cool the computer device (300).

[0123] The fire warning detection system (1) according to the third aspect is the second aspect, and further includes a detection unit (12) and a holding member (13) that holds the detection unit (12). The housing (200) has a first side wall (201) and a second side wall (202). The first side wall (201) allows cool air flowing into the housing (200) from the air outlet (101) to pass through. The second side wall (202) is aligned with the first side wall (201) in one direction and allows hot air that has passed through the computer device (300) to pass toward the air inlet (102). The holding member (13) is attached to the second side wall (202) within the housing (200). The estimation unit (113) further estimates an attachment angle (α1) of the holding member (13) relative to the second side wall (202).

[0124] According to this aspect, the amount of airflow (AC1) flowing into the detection unit (12) increases, and as a result, the detection accuracy of the detection unit (12) can be improved.

[0125] In the fire warning detection system (1) according to the fourth aspect, in the third aspect, the holding member (13) has an angle adjustment mechanism (130) that adjusts the mounting angle (α1) in accordance with input information from outside.

[0126] According to this aspect, it is possible to adjust the mounting angle (α1) of the holding member (13) by remote control from the outside.

[0127] A fire warning detection system (1) according to a fifth aspect is the fourth aspect, but includes a plurality of detection units (12). The plurality of detection units (12) correspond one-to-one to a plurality of computer devices (300). The input information includes information corresponding to one of the plurality of detection units (12). The angle adjustment mechanism (130) readjusts the mounting angle (α1) of the holding member (13) that holds one of the detection units (12) in accordance with the input information. The fire warning detection system (1) further includes a determination unit (114). The determination unit (114) determines whether or not there are warning signs of a fire based on the detection result of the one detection unit (12).

[0128] According to this aspect, it is possible to determine whether or not there are signs of a fire based on the detection result of one detection unit (12).

[0129] A fire warning detection system (1) according to a sixth aspect is any one of the third to fifth aspects, further comprising a second detection unit (12B). The second detection unit (12B) detects the direction of the airflow (AC1), unlike the first detection unit (12A) that is the detection unit (12). The estimation unit (113) estimates the mounting angle (α1) based on the detection result of the second detection unit (12B).

[0130] According to this aspect, by estimating the mounting angle (α1) based on the detection result of the second detection section (12B), it is possible to further improve the detection accuracy of the detection section (12).

[0131] A seventh aspect of the fire warning detection system (1) is the same as any one of the third to sixth aspects, wherein the detection unit (12) has an inlet (123) through which the airflow (AC1) flows in. The holding member (13) is plate-shaped and has a first surface (131) and a second surface (132) that face each other. The holding member (13) is located on the first side wall (201) side in one direction and further has an end surface (133) that connects the first surface (131) and the second surface (132). The detection unit (12) is held by the holding member (13) such that the inlet (123) is flush with the end surface (133) of the holding member (13) or is located closer to the first side wall (201) than the end surface (133).

[0132] According to this aspect, it is possible to reduce the influence of turbulence of the airflow (AC1).

[0133] In a fire warning detection system (1) according to an eighth aspect, in any one of the third to sixth aspects, the detection unit (12) has a first inlet (123A) and a second inlet (123B) through which the airflow (AC1) flows in. The holding member (13) is plate-shaped and has a first surface (131) and a second surface (132) that face each other. The first inlet (123A) is disposed on the first surface (131) side in the thickness direction of the holding member (13). The second inlet (123B) is disposed on the second surface (132) side in the thickness direction of the holding member (13).

[0134] According to this aspect, it is possible to reduce the influence of turbulence of the airflow (AC1).

[0135] In the fire warning detection system (1) according to the ninth aspect, in the eighth aspect, the detection unit (12) detects the presence or absence of abnormal gas based on both the airflow (AC1) flowing in from the first inlet (123A) and the airflow (AC1) flowing in from the second inlet (123B).

[0136] According to this aspect, it is possible to improve the detection accuracy of the detection unit (12) compared to when the detection unit (12) detects the presence or absence of abnormal gas based on the airflow (AC1) flowing in from the first inlet (123A) or the airflow (AC1) flowing in from the second inlet (123B).

[0137] In the fire warning detection system (1) according to the tenth aspect, in any one of the first to ninth aspects, the abnormal gas includes at least one of hydrogen chloride gas, ammonia gas, carbon monoxide gas, and formaldehyde gas.

[0138] According to this aspect, it is possible to improve the accuracy of detecting signs of fire caused by melting or ignition of the covered wire (FS).

[0139] A fire sign detection system (1) according to an eleventh aspect is any one of the first to tenth aspects and includes a plurality of detection units (12). The fire sign detection system (1) further includes a determination unit (114). The determination unit (114) determines whether or not there are signs of a fire based on at least one of the detection result of the detection unit (12) that detected the abnormal gas with the highest concentration among the plurality of detection units (12) and the detection results of the plurality of abnormal gases by the detection units (12).

[0140] According to this aspect, it is possible to determine whether or not there are signs of a fire while reducing the processing load on the determination unit (114).

[0141] In the fire warning detection system (1) according to the twelfth aspect, in any one of the third to eleventh aspects, each of the first side wall (201) and the second side wall (202) is made of a punched metal having a plurality of holes.

[0142] According to this aspect, it is possible to improve the flow of the air current (AC1) in the air current circulation cycle (C1).

[0143] A fire warning detection method according to a thirteenth aspect is a fire warning detection method for detecting warning signs of a fire that may occur in a data center (100). The data center (100) has an airflow circulation cycle (C1) formed therein, the airflow circulation cycle (C1) including an air outlet (101) provided on a floor (F1) of the data center (100) and an air inlet (102) provided on a ceiling (W1) of the data center (100). The airflow circulation cycle (C1) supplies cool air from the air outlet (101) from at least one of below and to the side of a computer device (300) housed in a housing (200) installed in the data center (100), and guides hot air that has passed through the computer device (300) to the air inlet (102). The fire warning detection method includes an acquisition step (ST1), an analysis step (ST2), and an estimation step (ST3). In the acquisition step (ST1), first information, which is information about the structure of the data center (100) and the structure of the enclosure (200), and second information, which is information about the airflow (AC1) in the airflow circulation cycle (C1), are acquired. In the analysis step (ST2), based on the first information and second information acquired in the acquisition step (ST1), the flow of the airflow (AC1) containing abnormal gas associated with at least one of melting and ignition in the covered wires (FS) connected to the computer device (300) and / or electronic components constituting the computer device (300) is analyzed. In the estimation step (ST3), based on the analysis results of the analysis step (ST2), at least one of the positions (Po1) and the number of detection units (12) that detect the presence or absence of abnormal gas within the enclosure (200) is estimated.

[0144] According to this aspect, it is possible to accurately detect signs of a fire before it occurs.

[0145] A program according to a fourteenth aspect is a program for causing one or more processors to execute the fire sign detection method according to the thirteenth aspect.

[0146] According to this aspect, it is possible to accurately detect signs of a fire before it occurs.

[0147] The configurations according to the second to twelfth aspects are not essential for the fire warning detection system (1) and may be omitted as appropriate.

[0148] 1 Fire sign detection system 12 Detection unit 12A First detection unit (detection unit) 12B Second detection unit 13 Holding member 100 Data center 101 Air outlet 102 Intake port 114 Determination unit 123 Inlet 123A First inlet 123B Second inlet 130 Angle adjustment mechanism 131 First surface 132 Second surface 133 End surface 200 Housing 201 First side wall 202 Second side wall 300 Computer device AC1 Air flow C1 Air flow circulation cycle F1 Floor surface FS Covered wire W1 Ceiling surface α1 First angle β1 Second angle

Claims

1. A fire warning detection system for detecting warning signs of a fire that may occur in a data center, wherein the data center includes an air outlet provided on a floor surface of the data center and an air inlet provided on a ceiling surface of the data center, and an airflow circulation cycle is formed in which cool air is supplied from the air outlet from at least one of below and to the sides of computer equipment housed in a housing installed in the data center and hot air that has passed through the computer equipment is guided to the air inlet, the fire warning detection system comprising: a detection unit that detects the presence or absence of abnormal gas associated with at least one of melting and ignition in insulated wires connected to the computer equipment and at least one of electronic components that constitute the computer equipment; and a holding member that holds the detection unit, wherein the housing has: a first side wall that passes through the cool air flowing into the housing from the air outlet; and a second side wall that is aligned with the first side wall in one direction and passes the hot air that has passed through the computer equipment toward the air inlet, and the holding member is attached to the second side wall within the housing at an angle relative to the second side wall.

2. A fire warning detection system as described in claim 1, wherein a first angle formed between the holding member and the second side wall is defined as α1, and a second angle formed between the direction of the airflow passing through the detection unit held by the holding member and the second side wall is defined as β1, wherein the first angle and the second angle satisfy 0<α1 and α1≦β1.

3. A fire detection system as described in claim 2, wherein the first angle and the second angle further satisfy β1 / 2≦α1.

4. A fire warning system as described in claim 2 or 3, wherein the holding member has an angle adjustment mechanism that adjusts the first angle in response to external input information.

5. A fire precursor detection system as described in claim 4, comprising a plurality of the detection units, the plurality of detection units being in one-to-one correspondence with the plurality of computer devices, the input information including information corresponding to one of the plurality of detection units, the angle adjustment mechanism readjusting the first angle of the holding member holding the one of the detection units in accordance with the input information, and further comprising a judgment unit which judges whether or not there are any signs of a fire based on the detection result of the one of the detection units.

6. A fire warning detection system as described in claim 4, further comprising: a first detection unit which is the detection unit; and a second detection unit which is different from the first detection unit and which detects the direction of the airflow in the airflow circulation cycle, wherein the angle adjustment mechanism further adjusts the first angle based on the detection result of the second detection unit.

7. A fire warning detection system as described in any one of claims 1 to 6, wherein the detection unit has an inlet through which airflow in the airflow circulation cycle flows in, the holding member is plate-shaped with a first surface and a second surface opposing each other, and further has an end surface located on the first side wall side in the one direction and connecting the first surface and the second surface, and the detection unit is held by the holding member such that the inlet is flush with the end surface of the holding member or is located closer to the first side wall than the end surface in the one direction.

8. A fire warning detection system as described in any one of claims 1 to 6, wherein the detection unit has a first inlet and a second inlet through which airflow in the airflow circulation cycle flows in, the holding member is plate-shaped having a first surface and a second surface opposing each other, the first inlet is disposed on the first surface side in the thickness direction of the holding member, and the second inlet is disposed on the second surface side in the thickness direction of the holding member.

9. A fire warning detection system as described in claim 8, wherein the detection unit detects the presence or absence of the abnormal gas based on both the airflow flowing in from the first inlet and the airflow flowing in from the second inlet.

10. A fire warning detection system according to any one of claims 1 to 9, wherein the abnormal gas includes at least one of hydrogen chloride gas, ammonia gas, carbon monoxide gas, and formaldehyde gas.

11. A fire warning detection system as described in any one of claims 1 to 10, comprising a plurality of detection units, and further comprising a judgment unit which judges whether or not there is a warning of a fire based on at least one of the detection results of the detection unit which detects the abnormal gas with the highest concentration among the plurality of detection units and the detection results of the plurality of abnormal gases by the detection units.

12. A fire detection system as described in any one of claims 1 to 11, wherein each of the first side wall and the second side wall is made of a punched metal having a plurality of holes.

13. A fire warning system as claimed in any one of claims 1 to 12, wherein the position of the detection unit within the housing includes a position that does not interfere with cooling of the computer device by the airflow in the airflow circulation cycle.

14. A fire warning detection system as claimed in any one of claims 1 to 13, further comprising: an acquisition unit that acquires first information, which is information relating to a structure of the data center and a structure of the casing, and second information, which is information relating to the airflow in the airflow circulation cycle; an analysis unit that analyzes the flow of the airflow including abnormal gas associated with at least one of melting and ignition in insulated wires connected to the computer device and at least one of electronic components that constitute the computer device, based on the first information and the second information acquired by the acquisition unit; and an estimation unit that estimates at least one of the positions and the number of the detection units within the casing, based on the analysis results of the analysis unit.

15. A fire warning detection system as described in claim 14, wherein the estimation unit further estimates a first angle which is an angle between the retaining member and the second side wall.

16. A fire warning detection system as described in claim 15, further comprising a second detection unit that detects the direction of the airflow different from the first detection unit, and the estimation unit estimates the first angle based on the detection result of the second detection unit.

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