JP5069889B2 - Smoke detector - Google Patents

Description

  The present invention relates to a smoke sensing device that requires high sensitivity.

A conventional smoke detection device, which is a high-sensitivity sensor, is connected to a sampling tube in which a plurality of small holes arranged in a monitoring space are formed at regular intervals, and sucks outside air in the monitoring space through the sampling tube. And a detection unit for detecting smoke from the sucked outside air, and a rack unit to which these are mounted.
The rack unit is provided with a connecting portion to which the sampling tube is connected. When the detection unit is slid along the guide rail provided in the rack unit, the detection unit is held by the latch mechanism provided in the rack unit. At the same time, the sampling tube connection portion and the outside air passage area of the detection unit are electrically connected. Similarly, when the fan unit is slid along the guide rail, the fan unit is held by the latch mechanism provided in the detection unit, and the outside air passage area of the detection unit and the intake port of the fan unit are electrically connected. It has become.
As a result, the sampling tube communicates with the fan unit via the detection unit, the outside air is sucked from the sampling tube by the suction force of the fan unit, and the outside air passes through the detection unit to detect smoke particles.
In addition, each unit is provided with a connector for system connection on the opposite surface of each unit, and is arranged so that the connection of the connector between each unit is also performed in accordance with the connection operation of each unit (for example, Patent Documents). 1).
Japanese Patent No. 3216947

In the conventional smoke detection device, when the fan unit or the detection unit is slid along the guide rail, the fan unit and the detection unit are attached to the rack unit and connected to the rack unit. It is possible to easily remove and assemble each unit at the time of replacement.
However, in the case of a structure in which the connectors on the opposing surfaces are connected by sliding movement for mounting, for example, the rack unit and the detection unit are directly connected because the connectors of adjacent units are connected to each other. However, the rack unit and the fan unit are not directly connected. For this reason, for example, when a circuit board is provided on the rack unit side and the unit detects a failure or abnormality on the circuit board, is an abnormality detection signal input to the rack unit side generated from the detection unit? There is an inconvenience that it is difficult to identify whether the light is emitted from the fan unit via the detection unit.

  In addition, in the conventional smoke detection device, the main configuration is unitized so that the unit can be easily and quickly replaced. However, if any abnormality or failure occurs in each unit, which unit is causing the abnormality? It is difficult to specify, and there has been a problem that it may be necessary to investigate the failure location for all units.

  In order to solve various problems in the conventional smoke detection device as an ultra-high sensitivity sensor, it is possible to easily identify the faulty part at the time of failure, and to perform maintenance / replacement work quickly, easily and inexpensively. For the purpose.

According to the first aspect of the present invention, there is provided a suction part for sucking outside air, a detection part for detecting smoke particles from the sucked outside air, a casing for allowing the sucked outside air to pass through, and for removing dust from the outside air in the casing. A filter unit having a filter, a circuit unit that performs processing required for smoke detection, and a housing that can be opened on one side and that stores the suction unit, the detection unit, the filter unit, and the circuit unit, The suction unit, the detection unit, and the filter unit are individually detachable units from the housing, and the operation of the connection structure unit, the detection unit, and the circuit unit that can be coupled in a state where the units are joined to each other is stopped. And a stop switch for stopping the operation of the suction drive source of the suction unit, and smoke notification means for notifying the detection of smoke particles.

The invention described in claim 2 is a suction part for sucking outside air, a detection part for detecting smoke particles from the sucked outside air, a casing for allowing the sucked outside air to pass through, and for removing dust from the outside air in the casing. A filter unit having a filter, a circuit unit that performs processing required for smoke detection, and a housing that can be opened on one side and that stores the suction unit, the detection unit, the filter unit, and the circuit unit, The suction unit, the detection unit, and the filter unit are individually detachable units from the housing, and the operation of the connection structure unit, the detection unit, and the circuit unit that can be coupled in a state where the units are joined to each other is stopped. And a stop switch for stopping the operation of the suction drive source of the suction section, and suction drive source drive state notifying means for notifying the drive state of the suction drive source.

  The invention described in claim 3 has the same configuration as that of the invention described in claim 2, and is characterized in that the suction drive source drive state notifying means is provided side by side on the stop switch.

  A fourth aspect of the invention has the same configuration as that of the first aspect of the invention, and automatically operates the suction drive source after a predetermined time has elapsed from the input of the stop switch. A return control unit for returning is provided.

  The invention according to claim 5 has the same configuration as the invention according to any one of claims 1 to 4, and is configured by a shutter device that blocks inflow of outside air to the detection unit, and input of the stop switch. And a shut-off controller that executes a shut-off operation of the shutter device.

  The invention described in claim 6 has the same configuration as that of the invention described in any one of claims 1 to 5, and is characterized in that the stop switch is provided in the circuit portion.

According to the first aspect of the present invention, since the suction unit, the detection unit, and the filter unit are individually detachable from the housing, they can be separately separated and replaced. Maintenance and replacement work can be performed at low cost.
Furthermore, by providing a stop switch for stopping the suction, by stopping the suction when the smoke notification is being performed, whether or not the notification is performed again in a situation where the smoke particles do not enter, It is possible to confirm the occurrence of erroneous detection or abnormality / defect. As a result, it is possible to specify that a failure or abnormality has occurred in at least the detection unit, and to perform maintenance / replacement work quickly, easily, and inexpensively.

According to the second aspect of the present invention, the suction part, the detection part, and the filter part are unitized so that they can be separated and replaced individually, and maintenance and replacement work can be performed quickly, easily, and inexpensively.
Further, when the suction is stopped by the stop switch during maintenance, the suction drive source drive state notifying means notifies the stop of the suction drive source, and when it is driven again, the drive state is notified.
For this reason, forgetting to return the suction drive source can be prevented, and smoke detection can be continued at all times.

  According to the third aspect of the present invention, since the suction drive source drive state notifying means is arranged in the stop switch, it is possible to immediately confirm the drive and stop of the suction drive source by the stop switch, and more effectively. It becomes possible to prevent forgetting to return the suction drive source.

  In the invention according to claim 4, since the suction stop state is automatically restored, it is possible to reduce the amount of work for the restoration. In addition, it is possible to prevent forgetting to return and to continuously detect smoke.

  According to the fifth aspect of the invention, since the shutter device is shut off when the suction is stopped, the shutter device can more effectively prevent dust from entering from the outside due to spraying or the like, and more strictly smoke. In a situation where particles do not enter, it is possible to confirm the occurrence of erroneous detection or abnormality / defect in the detection unit.

  According to the sixth aspect of the present invention, by providing the stop switch in the circuit portion, wiring for connecting the stop switch and the circuit is unnecessary, and the configuration can be simplified and the number of parts can be reduced. Further, by eliminating the need for wiring, it is less susceptible to noise and the like.

(Overall configuration of the embodiment of the invention)
An ultrasensitive sensor 10 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external perspective view of the ultrahigh sensitivity sensor 10, FIG. 2 is a plan view of the housing 20 with the lid 21 removed, and FIG. 3 is a perspective view of the same state.
As shown in the figure, the ultra-sensitive sensor 10 removes a rectangular parallelepiped housing 20 having a lid 21 that can be removed by a set screw, and dust from outside air taken from outside the housing 20 through a sampling tube (not shown). The filter unit 30, the detection unit 50 for detecting smoke particles in the outside air that has passed through the filter unit 30, the suction unit 80 that generates a suction force of the outside air through the sampling pipe, and the inflow of outside air to the detection unit 50 A shutter device 40 (not shown) forcibly shutting off, a circuit unit including the main substrate 100 and the interface substrate 150, and a coupling structure in which the filter unit 30, the detection unit 50, and the suction unit 80 are mounted and held inside the housing 20. Part 90, both of which are stored in the housing 20. The ultra-sensitive sensor 10 is connected to a control device (receiving device) 200 that can monitor and control the ultra-sensitive sensor 10. The ultra-high sensitivity sensor 10 stores each component in the housing 20, and the control device 200 is installed away from the ultra-high sensitivity sensor 10.
The filter unit 30, the detection unit 50, and the suction unit 80 can be separated from the housing 20 in individual units, and each unit is configured as a unit.
Hereinafter, each part will be described in detail.

(Casing)
The entire surface of the housing 20 is open, and the open surface is covered with a lid 21. Here, the following description of the ultrahigh sensitivity sensor 10 will be made on the assumption that the lid body 21 is an upper surface (in addition, when the ultrahigh sensitivity sensor 10 is actually installed in a building, the lid body). The 21 side does not always face upward).
On one side surface of the housing 20, an open sampling tube connection 22 is formed. Further, an exhaust port 23 for exhausting outside air that has passed through the filter unit 30, the detection unit 50, and the suction unit 80 to the outside of the housing 20 is formed on the other side surface. Further, a pair of plate-like housing fixing portions 24 are provided on the bottom portion of the housing 20 so as to protrude left and right. The pair of housing fixing portions 24 are formed with through holes through which screws are inserted. For example, the housing 20 can be screwed to the wall surface of a building.

  In addition, on the outer surface side of the lid body 21, an alarm buzzer 25 that emits sound such as a fire alarm sound, a ringing stop switch 26 for stopping the sound emitted from the alarm buzzer 25, and an operating state of the ultra-sensitive sensor 10 ( An operation indicator lamp 27 that lights up (fire detection) is provided. The ringing stop switch 26 is a display lamp that can be pressed and can be turned on as a whole.

(Shutter device)
The shutter device 40 is connected to the connection portion 22 of the sampling tube inside the housing 20. The shutter device is provided in the middle of a conduit (not shown) that connects the connecting portion 22 and the filter portion 30, and is provided with a shutter plate (not shown) that is movable between a position that closes the conduit and a position that does not close the conduit. And a solenoid 41 for switching the position of the shutter plate.
Further, the shutter device 40 includes a signal line 42 for making an electrical connection for allowing a drive current to flow to the solenoid 41, and a male connector for connecting to the main board 100 of the circuit unit at the tip thereof. 43 is equipped.
The operation of the solenoid is controlled by the main board 100, and the inflow of outside air to the downstream side can be prevented by moving the shutter plate to the closed position.
The shutter device 40 may be a manual device that manually opens and closes the shutter as needed, without using a solenoid.

(Filter part)
FIG. 4 is a front view of the filter unit 30 as viewed from the detection unit 50 side.
The filter unit 30 is fixed to the fixing plate 91 of the connection structure unit 90 by a set screw, and includes an internal hollow casing 33 including a lid cover 31 and a main body 32, and a filter 34 provided in the casing. Yes.
The upper part of the main body 32 of the casing 33 is opened so that the lid cover 31 can be attached. The lid cover 31 is fitted to the main body 32, and both ends are fixedly attached with set screws. The filter part 30 is arranged so that a part thereof is adjacent to the main board 100 of the circuit part, and a projecting section 31 a extending toward the main board 100 is provided at one end of the lid cover 31. ing. The protruding section 31a is provided so that it can be detected by means for detecting whether or not the lid cover 31 provided on the main board 100 is mounted, and the mounting detection will be described later.

The inside of the main body 32 is divided into two regions 32a and 32b, and one region 32a is formed with an external air flow inlet 35 connected to the connecting portion 22 of the housing 21 through the shutter device, and the other A cylindrical outside air discharge port 36 connected to the detection unit 50 is formed in this area. The outside air that has flowed into the one region 32 a of the main body 32 from the outside air flow inlet 35 passes through the inside of the lid cover 31, reaches the other region 32 b, passes through the outside air discharge port 36, and flows into the detection unit.
In such a structure, the filter 34 is disposed at the boundary between the lid cover 31 and the region 32 b of the main body 32, and all the outside air that passes through the filter unit 30 passes through the filter 34.
The filter 34 is made of a porous material and captures fibers, insects and the like in the gas. That is, the filter 34 allows smoke particles to pass through and removes dust and dirt.

  In addition, two Zener diodes 37 are provided inside the casing 33 of the filter unit 30 as outside air flow rate change detecting means, and at the tip of a signal line 38 for detecting voltage changes of these Zener diodes 37. A male connector 39 for connecting to the main board 100 of the circuit unit is provided. The two Zener diodes 37 have different temperature characteristics of voltage changes, and by monitoring these voltage changes, it is possible to detect changes in the air flow rate passing through the filter unit 30. That is, the two Zener diodes 37 function as flow rate change detection means.

(Detection unit)
5 is a perspective view of the detection unit 50, FIG. 6 is a cross-sectional view taken along line XX in FIG. 5, and FIG. 7 is a cross-sectional view taken along line YY in FIG.
The detection unit 50 includes a substantially rectangular parallelepiped casing 51, an LD (laser diode) 52 as a light source for irradiating smoke particles, a detection PD (photodiode) 53 as a light receiving element for detecting scattered light from the smoke particles, A test LED (light emitting diode) 54 for irradiating the detection PD with light passing through the smoke detection area, a monitoring PD 55 as light source output detection means for receiving the light passing through the smoke detection area by the LD 52, and an LD 52 and test LED 54 The equipped first substrate 56, the second substrate 57 equipped with the detection PD 53 and the monitoring PD 55, the first connecting pipe 58 connected to the filter unit 30, and the first substrate connected to the suction unit 80. And two connecting pipes 59.

The casing 51 is provided with a center hole 51a formed so as to penetrate the center in a circular shape. A first connecting pipe 58 is connected to one end of the center hole 51a, and a second connecting pipe 59 is connected to the other end. And the external air from the filter part 30 flows into the said center hole part 51a through the 1st connection pipe 58. As shown in FIG. Thereby, the inside of the center hole 51a functions as a smoke detection region.
The casing 51 is formed with a light guide hole 51b from the LD 52 orthogonal to the center hole 51a. The light guide hole to the monitoring PD 55 is opposed to the center hole 51a across the center hole 51a. A portion 51e is formed. Further, the casing 51 is formed with a light guide hole 51d from the test LED 54 orthogonal to the center hole 51a and the light guide hole 51b, and faces the opposite side of the center hole 51a. In addition, a light guide hole 51c to the detection PD 53 is formed.

The light guide hole 51b from the LD 52 is formed so as to be straight toward the center line of the center hole 51a from the LD 52 provided in the vicinity of the outside of the casing 51, and the optical axis of the LD 52 is the light guide hole 51b. It is provided so as to coincide with the center line. Further, the LD 52 is provided with an optical system (not shown) so that the laser beam is condensed at the position of the center line of the light guide hole 51b.
The light guide hole 51e to the monitoring PD 55 includes an upstream section provided on an extension line of the light guide hole 51b and a downstream section bent at a right angle to the upstream section by the reflecting plate 60 in the middle. The laser light emitted from the LD 52 is directly incident on the light guide hole 51e, reflected by the reflecting plate 60, and incident on the monitoring PD 55.
The light guide hole 51d from the test LED 54 includes an upstream section provided in parallel with the light guide hole 51b and a downstream section bent at a right angle with respect to the upstream section by the reflecting plate 60 in the middle. The downstream section is provided so that its center line is orthogonal to the center line of the center hole 51a and the optical axis of the laser beam.
The light guide hole 51c to the detection PD 53 is provided on the extension line of the downstream section of the light guide hole 51d. The irradiation light emitted from the test LED 54 is reflected by the reflection plate 60 and then directly enters the light guide hole 51 c and enters the detection PD 53.
The center hole 51a and the light guide holes 51b to 51d in the casing 51 are hermetically sealed so that light from the outside does not enter.

When the laser light is emitted from the LD 52 due to the arrangement of the light guide hole portions 51b to 51d, the light reception is detected only by the monitoring PD 55 when smoke particles are not present in the center hole portion 51a. Thereby, it can be detected by the monitoring PD 55 whether the laser beam is emitted from the LD 52 and whether the laser beam intensity is normal.
Further, when smoke particles pass on the center line of the center hole 51a, laser light is irradiated to generate scattered light, a part of which enters the light guide hole 51c, and the detection PD 53 detects light reception. This detects smoke particles from the fire.
Further, when the test LED 54 is turned on, the received light is detected by the detection PD 53. Thereby, it is possible to detect whether or not the detection PD 53 can correctly detect the received light.

Both the first connecting pipe 58 and the second connecting pipe 59 are fixedly mounted on the front surface and the rear surface of the casing 51 so as to be equal to the inner diameter of the center hole 51a and the center line is on the same axis. Yes.
The first connecting pipe 58 can be inserted into the cylindrical outside air discharge port 36 of the filter unit 30 described above, and an O-ring that seals between the outer peripheral surface and the inner peripheral surface of the outside air discharge port 36. 58a is equipped. In addition, the first connection pipe 58 is arranged to face the outside air outlet 36 in a state where the filter unit 30 and the detection unit 50 are respectively held by the fixing plate 91 of the connection structure unit 90. Further, an attachment plate 61 for mounting the detection unit 50 on the fixed plate 91 of the connection structure unit 90 is provided at the lower portion of the casing 51, and the moving operation direction when the detection unit 50 is mounted and the first direction. The direction in which the connecting pipe 58 is inserted into the outside air outlet 36 coincides. That is, when the detection unit 50 is mounted in the housing 20, the first connection pipe 58 and the outside air discharge port 36 can be connected at the same time.
Further, the second connecting pipe 59 can be inserted into a cylindrical outside air suction port 83 of a suction unit 80 described later, and a seal is intended between the outer peripheral surface and the inner peripheral surface of the outside air suction port 83. An O-ring 59a is equipped. In addition, the second connection pipe 59 is disposed so as to face the outside air suction port 83 in a state where the detection unit 50 and the suction unit 80 are respectively held by the fixing plate 91 of the connection structure unit 90. Further, an attachment plate 86 for mounting the suction unit 80 to the fixed plate 91 of the connection structure unit 90 is provided below the casing 82 of the suction unit 80 described later. The moving operation direction coincides with the direction in which the second connecting pipe 59 is inserted into the outside air suction port 83. That is, when the suction part 80 is mounted in the housing 20, the second connection pipe 59 and the outside air suction port 83 can be connected at the same time.

The first substrate 56 is provided with a driver circuit (not shown) together with the LD 52 and a driver circuit (not shown) together with the test LED 54. Further, when the first substrate 56 is disposed on the casing 51, the LD 52 and the test LED 54 are arranged so that the LD 52 and the test LED 54 are inserted and held in the light guide holes 51b and 51d, respectively. 56.
The second substrate 57 is provided with an amplifier circuit (not shown) together with the detection PD 53 and an amplifier circuit 55a (not shown) together with the monitoring PD 55. In addition, when the second substrate 57 is disposed on the casing 51, the detection PD 53 and the test LED 54 are second so that the detection PD 53 and the test LED 54 are inserted and held in the light guide holes 51c and 51e, respectively. Is disposed on the substrate 57.
Further, the first substrate 56 is provided with a thermistor 62 for detecting the temperature in the casing 51.
These substrates 56 and 57 are shielded by being surrounded by wall surfaces in the casing 51. In addition, signal lines 63 for electrical connection for performing signal transmission / reception, power supply and the like between the substrates 56 and 57 and the main substrate 100 are connected to the substrates 56 and 57, and the tip thereof. Is equipped with a male connector 64 for connecting to the main board 100 of the circuit section.

(Suction part)
FIG. 8 is a perspective view of the suction unit 80.
The suction unit 80 includes a blower 81 (see FIG. 12) that generates an outside air suction force by rotational driving, a casing 82 that stores the blower 81, and a cylindrical outside air that is connected to the second connection pipe 59 of the detection unit 50. A suction port 83, an outside air discharge port 84 that discharges the outside air sucked into the casing 82, and a rotation pulse output means 85 that outputs a pulse in accordance with the rotational speed of the blower 81 are provided.

The blower 81 includes a motor and an impeller (not shown). The blower 81 is driven to rotate by supplying power to the motor and generates a suction force.
The rotation pulse output means 85 outputs one pulse per one rotation of the blower 81. For example, an encoder that outputs a pulse in proportion to the amount of rotation may be used.

The casing 82 stores a blower 81 in a hollow interior, and functions as a gas passage path by discharging the outside air sucked from the outside air suction port 83 from the outside air discharge port 84.
The outside air suction port 83 can be inserted with the second connection pipe 59 of the detection unit 50 described above. As described above, the outside air suction port 83 is disposed so as to face the second connecting pipe 59 in a state where the detection unit 50 and the suction unit 80 are held on the fixed plate 91, respectively. The mounting movement operation direction of the mounting plate 86 for mounting the suction portion 80 to the fixed plate 91 provided in the same position as the direction in which the second connecting pipe 59 is inserted into the outside air suction port 83 is the same. That is, when the suction part 80 is mounted in the housing 20, it is possible to simultaneously connect the outside air suction port 83 and the second connection pipe 59.
On the other hand, the outside air discharge port 84 is an opening provided on one side surface of the casing 82, and the suction part 80 is disposed in the housing 20 so that the outside air discharge port 84 communicates with the exhaust part 23 of the housing 20. .

  Further, the suction unit 80 includes a signal line 87 for electrical connection for supplying power to the blower 81, transmitting a pulse signal of the rotation pulse output means 85 to the main substrate 100, and the like. Is equipped with a male connector 88 for connection to the main board 100 of the circuit section.

(Connection structure)
9 is a plan view showing the filter unit 30, the detection unit 50, and the suction unit 80 held by the connection structure 90, FIG. 10 is a side view thereof, and FIG.
The connection structure 90 includes a fixing plate 91 fixedly mounted on the inner bottom surface of the housing 20, a mounting plate 61 provided at the lower part of the detection unit 50, and a mounting plate 86 provided at the lower part of the suction unit 80. I have.
The fixed plate 91 is provided at both ends of the casing 31 of the filter unit 30 at the upper ends of a pair of standing portions 92 (one is not shown) formed at the end of the casing 20 near the connection portion 22 of the sampling tube. Is fixedly held by a set screw 93.
Further, the fixing plate 91 is formed with two L-shaped locking claws 94 for holding both sides of the detection unit 50 at the attachment position of the detection unit 50. Further, L-shaped locking claws 95 for holding both sides of the suction portion 80 are formed one by one at the attachment position of the suction portion 80 of the fixed plate 91.

The mounting plate 61 is formed with a slit hole 61a through which the locking claw 94 is inserted, and the mounting plate 86 is formed with a slit hole 86a through which the locking claw 95 is inserted.
The relationship between the locking claws 94 and 95 and the slit holes 61a and 86a will be described in detail.
Each of the locking claws 94 and 95 has the same structure. These are all plate-like, projecting upward from the plate surface of the fixed plate 91 and bent at the upper end in the horizontal direction. In other words, when viewed from the side, the L shape is exactly inverted. Further, the extending directions of the horizontal portions of the locking claws 94 and 95 are the center line direction in the outside air outlet 36 of the filter unit 30 after mounting, the center line direction in the center hole 51a of the detecting unit 50 after mounting, and mounting. It is directed so as to be parallel to the center line direction in the center hole 51a of the subsequent detection unit 50.
And by this shape, gap spaces 94a and 95a are formed below the horizontal portion.
On the other hand, the slit holes 61a and 86a have the same structure. These are formed so as to penetrate the plate surfaces of the mounting plates 61 and 86 vertically, and are formed to be approximately the same as or somewhat longer than the horizontal length of the locking claws 94 and 95. Further, the slit hole 61 a is formed along the center line direction of the center hole portion 51 a of the detection unit 50, and the slit hole 86 a is formed along the center line direction of the outside air suction port 83 of the suction unit 80.

The arrow in FIG. 11 indicates the moving operation direction of the attachment plate 61 (86) when the attachment structure portion 90 is used to attach the detection portion 50 (suction portion 80). As shown in the figure, during the mounting operation, the locking plate 94 (95) is inserted into the slit hole 61a (86a) by moving the mounting plate 61 (86) downward, and the detecting unit 50 (suction) The plate surface of the mounting plate 61 (86) is inserted into the gap space 94a (95a) by sliding the mounting plate 61 (86) in a direction in which the portion 80) approaches the filter unit 30 (detecting unit 50). , Sandwiched and held. Further, during the sliding movement, the first connection pipe 58 of the detection unit 50 is inserted into the outside air discharge port 36 of the filter unit 30 (the second connection pipe 59 of the detection unit 50 is inserted into the outside air suction port 83 of the suction unit 80. Connection) is achieved.
As shown in FIG. 10, the mounting plate 61 (86) is supported by a sliding projection 96 formed so as to protrude upward adjacent to the respective locking claws 94, 95, thereby detecting the detection unit 50 (suction unit 80). To stabilize the connected state.

The connection structure 90 is configured to hold the detection unit 50 and the suction unit 80 as two units by sliding movement, and the suction unit 80 mounted next to the detection unit 50 mounted first is detected. Since the arrangement prevents the take-out operation of the part 50, if a fixing means for preventing the slide movement for taking out the suction part 80 after mounting is provided, the suction part 50 is prevented from sliding. Fixing means can be dispensed with.
For this reason, a set screw 97 for fixing the attachment plate 86 to the fixing plate 91 is provided as a fixing means of the suction part 80. By stopping the set screw 97, it is possible to prevent the sliding movement of the detection unit 50 together with the suction unit 80 after mounting, and to fix both. Further, by removing the set screw 97, first, the suction part 80 can be removed by a movement operation reverse to the attachment, and the detection part 50 can be removed by a movement operation reverse to the attachment by removing the suction part 80. Become.

(Super high sensitivity sensor control system: main board)
FIG. 12 is a block diagram showing a control system of the ultra-high sensitivity sensor 10, and FIG. 13 is a block diagram showing a detailed configuration of the main board 150.
The main board 100 of the circuit unit is connected to the female connector 101 to which the male connector 39 of the filter unit 30 can be connected, the female connector 102 to which the male connector 43 of the shutter device 40 can be connected, and the male of the detection unit 50. The power supply is supplied to each part by adjusting the voltage of the power supply from the female connector 103 to which the mold connector 64 can be connected, the female connector 104 to which the male connector 88 of the suction part 80 can be connected, and the interface board 150. An interface 106 for connecting the power supply circuit 105 to each component outside the board, a program memory 107 in which programs 110 to 118 for executing various functions of the main board 100 are stored, and the programs 110 to 118 are executed. MPU 108, work memory 109 that is a work area of MPU 108, and LD 52 of detection unit 50 LD current control circuit 130 for performing current control, LEDs 131 to 137 for performing various notifications, lid cover detection LED 143 and lid cover detection PD 144 as attachment detection means for detecting the presence or absence of lid cover 31 of filter unit 30 And the motor drive of the solenoid drive circuit 139 of the shutter device 40, the comparator circuit 140 that sets the upper and lower thresholds for the output of the detection PD of the detection unit 50, and the blower 81 that is the suction drive source of the suction unit 80 are stopped. A blower stop switch 141 to be turned on, and a PD test switch 142 to turn on the test LED 54 of the detection unit 50.
Although not shown, each LED is provided with a driver circuit, and the lid cover PD is provided with an amplifier circuit.

The female connectors 101 to 104 are provided on the main board 100, and the male connectors 39, 43, 64, and 88 can be attached and detached manually. In other words, the combination of the female connectors 101 to 104 and the male connectors 39, 43, 64, and 88 allows the suction unit 30, the detection unit 50, and the filter unit 80 to be individually connected to the circuit unit. It functions as a general connection means.
Depending on the size of the main board 100, some of the female connectors (for example, 101 and 104) and the blower stop switch 141 may be provided on the interface board 150 described later.

Next, functions based on various programs 110 to 118 stored in the program memory 107 will be described.
First, the smoke detection program 110 will be described. When the smoke detection program 110 is executed by the MPU 108, the detection signal of the detection PD 53 is monitored via the comparator circuit 140 when the LD 52 is driven. When smoke particles enter the smoke detection area while the laser beam is emitted from the LD 52, the scattered light enters the detection PD 53 and changes its detection signal. In the comparator circuit 140, an upper limit value and a lower limit value are determined for the output of the detection PD 53, and only the output between them is regarded as smoke particle detection and input to the MPU 108.
Then, the MPU 108 calculates the smoke density according to the input detection signal, and outputs the smoke density signal to the control device 200 through the interface board 150.

  Next, the PD test program 111 will be described. The PD test program 111 is executed by the MPU 108 when the PD test switch 142 is input. When the program 111 is executed, the MPU 108 stops driving the LD 52 and turns on the test LED 54. The irradiation light of the test LED 54 is received by the detection PD 53 through the light guide holes 51d and 51c. At this time, if the detection PD 53 is normal, the output should be within a certain range, so the MPU 108 executes the determination. As a result, when the detected PD 53 shows an abnormal value, control is performed to turn on the PD state LED 137.

When the LD monitoring program 112 is executed, the MPU 108 monitors the driving current value of the LD 52 through the LD current control circuit 130 and also monitors the detection output (laser light intensity) of the monitoring PD 55. If both the drive current value of the LD 52 and the detection output of the monitoring PD 55 are within a predetermined normal value range, the extinguished state of the LD state LED 131 is maintained. Further, when either the drive current value of the LD 52 or the detection output of the monitoring PD 55 is outside the normal value range, the LD state LED 131 is controlled to blink. At this time, blinking is performed at different blinking periods depending on whether the drive current value of the LD 52 is abnormal or the detection output of the monitoring PD 55 is abnormal, thereby making it possible to identify which one is abnormal.
As a result, it is possible to detect the occurrence of an abnormality caused by either the LD current control circuit 130, the LD 52, or the driver circuit thereof, and to quickly identify the occurrence location of the abnormality.

  When the drive circuit monitoring program 113 is executed, the MPU 108 determines whether the driver circuit of the LD 52 is normally driven, and if normal, performs control to blink the LD drive LED 132 in synchronization with the driver circuit. .

When the detection unit temperature control program 114 is executed, the MPU 108 detects a change in the resistance value of the thermistor 62 from the voltage change through a circuit that energizes the thermistor 62 with a constant current value, thereby detecting the detection unit 50. Monitor the temperature change inside. At this time, when the temperature indicated by the thermistor 62 falls outside a predetermined normal range, the MPU 108 performs control to turn on the detection unit temperature LED 133.
Note that the drive current may be controlled so that the laser output is constant based on the temperature characteristics of the LD 52 in accordance with the temperature of the detection unit 50 obtained from the thermistor 62.

The lid cover notifying program 115 is for notifying when the lid cover 31 of the filter unit 30 is not in a fixed position.
As described above, the lid cover 31 includes the protruding section 31a that protrudes toward the main substrate 100 side. On the other hand, as shown in FIG. 2, a cover cover detection LED 143 and a cover cover detection PD 144 are provided on the main board 100 so as to face each other with the protruding section 31 interposed therebetween. Therefore, whether or not the irradiation light of the lid cover detection LED 143 is blocked by the protruding section 31a varies depending on whether or not the lid cover 31 is in a fixed position. Therefore, if the light reception intensity of the lid cover detection PD 144 is monitored. The presence or absence of the lid cover 31 can be identified.
When the lid cover notification program 115 is executed, the MPU 108 determines whether or not the light reception intensity of the lid cover detection PD 144 exceeds a predetermined value. When the predetermined value is exceeded, it is assumed that the lid cover 31 has been forgotten to be closed, the lid cover notification LED 134 is turned on, the drive of the blower 81 is stopped, and the solenoid 41 is driven to close the shutter. Execute. Furthermore, the MPU 108 notifies the control device 200 that the lid cover 31 has been forgotten to be closed, and performs an operation control that causes the notification buzzer 25 to sound.

The blower stop program 116 is executed by the MPU 108 when the blower stop switch 141 is input. When the program 116 is executed, the MPU 108 stops the blower 81, drives the solenoid 41 of the shutter device 40 to close the shutter, and blinks the blower state LED 135 only during the blower stop by the input of the blower stop switch 141. Perform motion control. Note that either shutter or blower stop may be executed first.
Here, in the smoke detection device 10, when power is supplied to the main board 100, the blower 81 is automatically driven so that the blower 81 continues to be driven unless the blower stop switch 141 is input. It has become.
Further, when the smoke concentration detected by the smoke detection program 110 described above becomes higher than a predetermined value, the smoke notification is performed by the control device 200, and when the smoke concentration becomes low, the smoke notification is immediately stopped.
Under these assumptions, when the blower stop switch 141 is input when smoke particles are normally detected and smoke notification is performed, the detection unit is stopped by stopping the blower 81 and closing the shutter. Intrusion of smoke particles into the 50 smoke detection areas stops. As a result, a drop in smoke density is detected and smoke notification is stopped. On the other hand, in the case where some defect occurs in the detection unit 50 and smoke notification is performed due to erroneous detection (non-fire report), even if the intrusion of smoke particles is blocked by stopping the blower 81 and closing the shutter. The false detection state is maintained and smoke notification is still continued.
That is, by providing the blower stop switch 141, it is possible to determine whether the detection unit 50 is normally detecting smoke particles.
In order to achieve the above object, the blower stop switch 141 and the blower state LED 135 are arranged close to each other on the main board 100.
Also, when executing the blower stop program 116, the MPU 108 starts timing simultaneously with the input of the blower stop switch 141, and automatically restarts the drive of the blower 81 and opens the shutter when a predetermined time (for example, several minutes) elapses. Then, the blower state LED 135 is turned off (when the failure of the blower 81 is detected by a blower monitoring program 139 described later, operation control is performed).
In addition, after it is found that the detection unit 50 can normally detect smoke particles (that the detection unit 50 is not out of order), for example, after the blower 81 is re-driven and the shutter is opened, the erroneous detection state is still present. If the problem persists, factors other than smoke particles (non-fire factors), such as outside air (atmosphere abnormalities in the place sucked by the sampling tube (monitoring area)), can be considered.
When the non-fire factor is confirmed (specified) by the input of the blower stop switch 141, a notification buzzer 25, an operation display is used as a confirmation means (smoke notification means) that the detection unit 50 can normally detect smoke particles. A lamp 27 can be used. Further, it may be performed while referring to the smoke density information of the control device 200.

  When the blower monitoring program 117 is executed, the MPU 108 counts the number of pulses output from the rotation pulse output means 85, determines whether the rotation speed of the blower 81 is within the normal range from the number of count pulses within a predetermined period, and normal When it falls below the range, the blower state LED 135 is controlled to be lit. Thereby, an abnormality in the rotational speed of the blower 81 can be notified.

When the airflow state monitoring program 118 is executed, the MPU 108 includes two zener diodes 37 and 37 (only one zener diode 37 is shown in FIG. 12 and the other is not shown) in the filter unit 30. Detecting the voltage, calculating the difference between these voltage values, comparing the value of the difference with each of a predetermined upper limit value and lower limit value, when exceeding the upper limit value or below the lower limit value, Control for blinking the airflow state LED 136 is executed. At this time, the airflow state LED 136 blinks at different periods depending on whether the upper limit value is exceeded or less than the lower limit value, thereby enabling identification.
The two Zener diodes 37 and 37 have different temperature characteristics. When the difference in voltage value exceeds the upper limit value, an air flow is generated in the filter unit 30 larger than the normal range, and each of the Zener diodes 37 and 37. Are cooled, and a large difference occurs in their voltage values. Such an increase in the air flow is expected to be a state in which a large amount of outside air flows in more than usual due to the sampling tube being detached.
Further, when the difference between the voltage values of the two Zener diodes 37 and 37 is lower than the lower limit value, the air flow is smaller than the normal range inside the filter unit 30, and the Zener diodes 37 and 37 are not cooled. No difference occurs in the voltage value. Such a decrease in the airflow is expected to be a state where the airflow is hindered by clogging of the filter.
That is, these states can be detected by the airflow state monitoring program 118.

(Super high sensitivity sensor control system: interface board)
The interface board 150 of the circuit unit includes a connection connector to the main board 100 (not shown), a power supply circuit 151 that adjusts the voltage of the power supply from the control device 200 to supply power to each unit, and each configuration outside the board. The interface 152 is a work area for the MPU 154, the program memory 153 storing the program for executing the function of the interface board 150 (only the board monitoring program 161 is shown in FIG. 12), the MPU 154 for executing the program, and the MPU 154. Terminal connection terminal which is a serial port for performing information communication by connecting to a work memory 155, a board status LED 156 for performing a predetermined notification and its driver circuit (not shown), and an external information processing terminal such as a personal computer 157 (for example, RS-232C input / output terminal) It is.
In the interface board 150, with respect to the information processing terminal connected through the terminal connection terminal 157, the detected smoke density, the air current state, the LD 52 driving current, the LD 52 laser light intensity, and the detected state of each unit are sequentially detected. Send abnormalities.

The interface board 150 is a board whose main function is to connect to an external device. However, as with the main board 100, the interface board 150 includes an MPU 154 that is an arithmetic processing unit, and can execute various functions by executing programs. It is.
Here, when the board monitoring program 161 stored in the program memory 153 is executed, the MPU 154 makes a response request to the MPU 108 of the main board 100 at a predetermined cycle, and there is no response until a predetermined time elapses from the request. Further, assuming that the MPU 108 of the main board 100 has an abnormality, the board state LED 156 is turned on to perform notification control.
In the interface board 150, various programs executed on the main board 100 may be executed.
Various LEDs and switches of the main board 100 may be provided on the interface board 150, or the interface board 150 and the main board may be integrated. That is, the present invention can be appropriately applied and changed without departing from the present invention.

(Control device for monitoring and controlling ultra-sensitive sensors)
The ultra-sensitive sensor 10 is connected to the control device 200 to constitute a smoke detection system. For example, when a plurality of ultra-sensitive sensors 10 are installed at a plurality of locations in a building, only the control device 200 is centrally arranged to perform centralized management of each ultra-sensitive sensor 10.
The control device 200 includes a connector for connection to an interface board 150 (not shown), a power supply circuit 201 that adjusts the voltage of a power supply supplied from outside and supplies power to each part of the device and the interface board 150, and an external device of the control device 200. An interface 202 for connection to the configuration, a program memory 203 storing a program for executing various functions (only the smoke density determination program 211 is shown in FIG. 12), an MPU 204 for executing the program, and a work area for the MPU 204 A work memory 205 and a display unit 206 for performing a predetermined display are provided.
The control device 200 is input with the detected smoke density, the air flow state, the LD 52 drive current, the LD 52 laser light intensity, the detected abnormal state of each unit, etc. sequentially detected from the main board 100 via the interface board 150. Is done. All of these can be displayed on the display unit 206, and display control is performed by the MPU 204.
Further, the control device 200 controls the notification buzzer 25, the sound stop button 26, and the operation indicator lamp 27 provided on the lid body 21 of the housing 20.

When the smoke density determination program 211 stored in the program memory 203 is executed, the MPU 204 determines whether or not the value exceeds a preset density value from the smoke density information received from the main board 100 and exceeds it. In that case, control for sounding the notification buzzer 25 is executed.
All functions of the control device 200 may be executed by the main board 100 or the interface board 150. In that case, it is good also as a structure which excludes the control apparatus 200 used as a separate structure, and stores all the structures in the housing | casing 20. FIG. In this case, the display unit may be provided inside the housing 20, but is preferably provided on the outside, for example, the lid 21.

(Effect of ultra-sensitive sensor)
In the ultra-high sensitivity sensor 10, the suction unit 80, the detection unit 50, and the filter unit 30 can be individually separated and exchanged by unitizing the suction unit 80, the detection unit 50, and the filter unit 30 individually.・ Maintenance and replacement work can be performed easily and inexpensively.
Further, since the suction unit 80, the detection unit 50, and the filter unit 30 individually have a male connector and a female connector as electrical connection means to the circuit unit, various information is transmitted through each connector on the circuit unit side. Since the input route is clarified and the input route becomes clear, individual monitoring for each unit can be performed easily, and the unit in which an abnormality or failure has occurred can be identified quickly and easily. .

  In addition, the connecting structure 90 can perform the unit mounting insertion operation along the direction (vertical direction) in which the units of the suction unit 80 and the detection unit 50 are stored inside from the open side of the housing 20. Unit mounting and separation can be performed easily and quickly.

  In addition, since the unit of the suction unit 80 is arranged to prevent the sliding movement when the unit of the detection unit 50 is removed by the connection structure unit 90, a set screw as a fixing means that does not slide and move only to the suction unit 80. By providing 97, the detection unit 50 can also be fixed, the configuration can be simplified and the number of parts can be reduced, and the productivity of the apparatus can be improved.

Further, by providing the lid cover 31 on the filter unit 30, it is possible to easily clean the internal filter 34, check for exchange dirt, etc., and perform maintenance and replacement work quickly, easily and inexpensively. .
In addition, the lid cover detection LED 143 and the lid cover detection PD 144 serving as mounting detection means detect whether or not the cover cover 31 is mounted, so that forgetting to mount or mounting defects are reduced, and maintenance and replacement work can be ensured, and quick and easy. Can be achieved.

Moreover, when the lid cover 31 is not attached by the lid cover notification program 115 for controlling the MPU 108 as a stop control unit, the suction is stopped, so that the internal suction of the dust is effectively avoided and the contamination is prevented. It is possible to effectively reduce the occurrence of erroneous detection as a cause.
Further, when the lid cover 31 is not attached by the lid cover notification program 115 that controls the MPU 108 as a cutoff control unit, the shutter unit 40 performs a cutoff operation, thereby effectively avoiding internal suction of dust. Therefore, it is possible to effectively reduce the occurrence of erroneous detection due to the mixing of these. In addition, by providing the shutter device 40, it is possible to more effectively prevent dust from entering due to causes such as spraying from the outside.
In addition, the lid cover notifying program 115 that controls the MPU 108 as the notification control unit performs notification when the lid cover 31 is not attached, so that the user can quickly recognize forgetting to attach the lid cover 31 or poor attachment. Therefore, it is possible to effectively avoid the internal suction of the dust and to effectively reduce the occurrence of erroneous detection caused by the contamination.

  Also, by providing the main board 100 with the blower stop switch 141 that stops the suction, whether or not the notification is performed again in a situation where the smoke particles do not enter by stopping the suction when the smoke notification is performed. Accordingly, it is possible to confirm the occurrence of erroneous detection or abnormality / defect of the detection unit 50. As a result, it is possible to specify that at least the detection unit 50 has a failure / abnormality, and to perform maintenance / replacement work quickly, easily, and inexpensively.

Further, the blower stop program 116 for controlling the MPU 108 as the return control unit automatically returns the suction stop state, so that the amount of work for return can be reduced. In addition, it is possible to prevent forgetting to return and to continuously detect smoke.
At that time, since the shutter device 40 is shut off together with the suction stop, the shutter device can more effectively prevent dust from entering from the outside due to spraying or the like, and the smoke particles do not enter more strictly. In the situation, it is possible to confirm the occurrence of erroneous detection or abnormality / defect in the detection unit 50.

  Further, since the blower state LED 135 as the smoke notification means and the stop switch 141 are provided side by side on the main board 100, it is possible to more easily check whether the detection unit is erroneously detected or abnormal or defective. .

  Furthermore, the zener diodes 37, 37 as the flow rate change detecting means detect the flow rate change of the outside air by the suction unit 80, and are notified by the air flow state LED 136 as the flow rate change notifying means. It is possible to detect airflow reduction due to clogging, and increase in airflow due to detachment of the pipe when a sampling pipe is used.

  In addition, the monitoring PD 55 as a light source output detection means for detecting an output change of the LD 52 includes an LD state LED 131 as an output change notification means for notifying an output change exceeding a predetermined amount of the LD 52, thereby causing an abnormality of the detection unit 50. , It becomes possible to quickly recognize the defect.

  Further, the circuit unit is composed of two substrates 100 and 150, MPUs 108 and 154 are provided as arithmetic processing units for each substrate, and one MPU 154 monitors the other MPU 108. It becomes possible to quickly recognize a defect.

  Further, since the terminal board connection terminal 157 as a connector for connecting a computer terminal for outputting information in the ultra-sensitive sensor 10 is provided on the interface board 150, the information in the ultra-sensitive sensor 10 can be easily managed outside the apparatus. It becomes possible to monitor.

External perspective view of ultra-sensitive sensor Top view of the housing with the lid removed The perspective view of the state which removed the cover body of the housing | casing Front view of the filter section viewed from the detection section side Perspective view of detector Sectional drawing along the XX line of FIG. Sectional drawing along the YY line of FIG. Perspective view of suction part The top view which shows the filter part hold | maintained by the connection structure part, a detection part, and a suction part Side view showing filter part, detection part and suction part held by connecting structure part Explanatory drawing of the main part of the connecting structure Block diagram showing control system of ultra-sensitive sensor Block diagram showing the detailed configuration of the main board of the ultra-sensitive sensor

Explanation of symbols

10 Ultra-high sensitivity sensor (smoke detection device)
20 Housing 21 Lid 25 Notification buzzer (smoke notification means)
26 Sound stop button 27 Operation indicator (smoke notification means)
30 Filter unit 31 Lid cover 31a Protruding section 33 Casing 34 Filter 37 Zener diode (flow rate change detecting means)
40 Shutter device 41 Solenoid 50 Detector 51 Casing 51a Center hole 51b, 51c, 51d, 51e Light guide hole 52 LD (light source)
53 Detection PD (light receiving element)
54 Test LED
55 Monitoring PD (Light source output detection means)
56 First board 57 Second board 60 Reflector 61 Mounting plate 61a Slit hole 62 Thermistor 63 Signal line 64 Male connector 80 Suction part 81 Blower 86 Mounting plate 86a Slit hole 87 Signal line 88 Male connector 90 Connecting structure part 91 Fixing plates 94, 95 Locking claw 97 Set screw (fixing means)
100 main board 101-104 female connector 115 lid cover notification program (stop control unit, shut-off control unit, notification control unit)
116 Blower stop program (return control unit)
131 LD state LED (output change notification means)
135 Blower state LED (suction drive source drive state notifying means)
136 Airflow state LED (flow rate change notification means)
141 Blower stop switch 143 Cover cover detection LED (mounting detection means)
144 Lid cover detection PD (mounting detection means)
150 Interface board 157 Terminal connection terminal (connector for computer terminal connection)
200 Control device (receiving device)

Claims (6)

A suction part for sucking outside air;
A detection unit for detecting smoke particles from the sucked outside air;
A filter unit having a casing through which the sucked outside air passes and a filter for removing dust from the outside air in the casing;
A circuit unit that performs processing required for smoke detection;
One surface is openable , and includes a housing for storing the suction part, the detection part, the filter part, and the circuit part,
The suction unit, the detection unit, and the filter unit are individually detachable from the housing, and
A connecting structure that is connectable to each other in a state where the units are joined together;
A stop switch for stopping the operation of the suction drive source of the suction unit without stopping the operation of the detection unit and the circuit unit ;
Smoke notification means for reporting the detection of smoke particles;
A smoke sensing device comprising: A suction part for sucking outside air;
A detection unit for detecting smoke particles from the sucked outside air;
A filter unit having a casing through which the sucked outside air passes and a filter for removing dust from the outside air in the casing;
A circuit unit that performs processing required for smoke detection;
One surface is openable , and includes a housing for storing the suction part, the detection part, the filter part, and the circuit part,
The suction unit, the detection unit, and the filter unit are individually detachable from the housing, and
A connecting structure that is connectable to each other in a state where the units are joined together;
A stop switch for stopping the operation of the suction drive source of the suction unit without stopping the operation of the detection unit and the circuit unit ;
Suction drive source drive state notifying means for notifying the drive state of the suction drive source;
A smoke sensing device comprising:   3. The smoke sensing device according to claim 2, wherein the suction drive source drive state notifying means is provided in line with the stop switch.   The smoke detection device according to any one of claims 1 to 3, further comprising a return control unit that automatically returns the operation of the suction drive source after a lapse of a predetermined time from the input of the stop switch. A shutter device that shuts off inflow of outside air to the detection unit;
The smoke detection device according to claim 1, further comprising: a shut-off control unit that executes a shut-off operation of the shutter device in response to an input of the stop switch.   The smoke detection device according to any one of claims 1 to 5, wherein the stop switch is provided in the circuit unit.

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