Cleaning system for window portion of fire sensor

Abstract

To provide a cleaning system for a window portion of a fire sensor, which can easily and at low cost clean the window portion of the fire sensor mounted in a high place such as a hall, an atrium and the like.SOLUTION: A fire sensor window portion cleaning system 1 according to the present invention is for cleaning window portions 23, 31 of a fire sensor having the window portions 23, 31 that allow light 15 to pass through, and comprises: a cleaning indication unit 5 which is provided in a fire receiver 3 and transmits a cleaning signal; and a cleaning execution unit 9 which is provided to the fire sensor and executes cleaning of the window portions 23 and 31, characterized in that the cleaning execution unit 9 includes: a wiper member 41 for cleaning the surfaces of the window portions 23 and 31; a drive unit 43 for driving the wiper member 41; and a control unit 45 for controlling the drive unit 43; and the control unit 45 receives a cleaning signal and drive-controls the drive unit 43 based on the cleaning signal.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fire detector window cleaning system for cleaning a window portion through which light passes in a fire detector.

Background Art

[0002] Conventionally, in large spaces such as halls and atriums, fire detectors such as photoelectric separation type smoke detectors and infrared / ultraviolet spot type detectors (hereinafter referred to as flame detectors) are installed to constantly monitor for the occurrence of fires.

[0003] As exemplified in Patent Document 1, a photoelectric separation type smoke detector senses smoke generated in a monitoring space and transmits a fire signal. The photoelectric separation type smoke detector is composed of a light transmitter containing a light emitting element such as an LED and a light receiver containing a light receiving element such as a sensor. The light transmitter and the light receiver are installed opposite each other with the monitoring space in between so that the light receiver can receive the light emitted by the light transmitter. When a fire occurs, the amount of light received by the light receiver is attenuated by the smoke of the fire. Therefore, the photoelectric separation type smoke detector detects this attenuation of the received light amount and transmits a fire signal to a fire receiver.

[0004] Window portions composed of lenses and the like are provided on the front surfaces of the light transmitter and the light receiver, respectively. The window portion of the light transmitter has a function of passing the light emitted by the light emitting element and adjusting the direction of the light in the horizontal direction, and the window portion of the light receiver has a function of focusing the incident light on the light receiving element in the light receiver.

[0005] On the other hand, as exemplified in Patent Document 2, a flame detector senses a flame generated in a monitoring area and transmits a fire signal. A light receiving element such as a sensor is housed in the flame detector. When a flame is generated in the monitoring area, the light receiving element of the flame detector receives the light radiated from the flame, detects a wavelength specific to the flame from this light, and transmits a fire signal to a fire receiver.

[0006] A window portion composed of a lens or the like is also provided on the front surface of the flame sensor. This window portion has a function of allowing the light radiated by the flame to pass through and cutting off light of wavelengths outside the detection range of the sensor.

[0007] As described above, fire detectors such as photoelectric separation type smoke detectors and flame sensors are provided with a window portion that allows light to pass through. However, various problems occur when this window portion becomes dirty. For example, in the case of a photoelectric separation type smoke detector, when the window portion becomes dirty, the amount of light received by the light receiver is attenuated, which may cause false alarms. In addition, in order to prevent such false alarms, when the state where the amount of light received is attenuated by a certain amount due to the dirt on the window portion continues for a predetermined time, processing for poor sensitivity is performed. In the case of a flame sensor, poor sensitivity is caused by the dirt on the window portion. In order to avoid these problems, conventionally, regular cleaning operations have been performed to remove the dirt on the window portion.

[0008] An example of a method for removing dirt on the window portion of a fire detector is disclosed in, for example, Patent Document 3. Claim 3 of Patent Document 3 describes a fire detector provided with a cleaning mechanism for spraying water on the light receiving glass window of the fire detector for cleaning. By regularly cleaning the dirt adhering to the light receiving glass window by the cleaning mechanism, malfunction and poor sensitivity caused by the dirt can be prevented.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0010] By providing a cleaning mechanism for the fire detector as in Patent Document 3, it is possible to periodically remove the dirt on the window portion. However, in the case of a fire detector installed indoors such as a hall or an atrium, using water will wet the walls and floors, which is a problem. In addition, since the above-described photoelectric separation type smoke detector and flame detector are installed at high places such as halls and atriums (for example, at a height of 15 m or more), it is necessary to provide piping facilities for supplying cleaning water to high places, which also incurs costs.

[0011] Therefore, conventionally, the fire detectors installed at high places such as halls and atriums have been cleaned manually by cleaners. When the installation height is relatively low (~6 m), a support rod with a length reaching the installation height was used, and the window portion of the fire detector was wiped with a cloth attached to the tip of the support rod to remove the dirt. However, the long support rod was difficult to handle, and there were cases where the support rod hit the fire detector and shifted the installation orientation of the fire detector. In the case of a photoelectric separation type smoke detector, if the orientation of the light emitter or the light receiver is shifted, it is necessary to re-adjust the optical axis, which is a problem. Also, in the case of a flame detector, if the orientation is shifted, the fire monitoring area will shift, which is a problem.

[0012] Also, when the installation location is even higher, cleaning using a support rod becomes difficult, so a high-altitude work vehicle or scaffolding assembly is required, which is costly and time-consuming.

[0013] As described above, it is necessary to periodically clean the window portion of the fire detector. However, in the case of a fire detector installed at a high place such as a hall or an atrium, conventionally, it has been cleaned manually by cleaners, and various problems have occurred.

[0014] The present invention has been made to solve the above problems, and an object thereof is to provide a fire detector window cleaning system that can clean the window portion of a fire detector attached to a high place such as a hall or an atrium at low cost and easily.

Means for Solving the Problems

[0015] (1) The fire detector window cleaning system according to the present invention is for cleaning the window of a fire detector having a window through which light passes, and comprises: a cleaning instruction unit provided in a fire receiver for transmitting a cleaning signal; a cleaning execution unit provided in the fire detector for executing the cleaning of the window, wherein the cleaning execution unit has a wiper member for cleaning the surface of the window, a driving unit for driving the wiper member, and a control unit for controlling the driving unit; the control unit is characterized by receiving the cleaning signal and driving and controlling the driving unit based on the cleaning signal.

[0016] (2) Further, in the above (1), the cleaning execution unit is configured to be separately attachable to an existing fire detector.

[0017] (3) Further, in the above (1) or (2), the cleaning instruction unit is characterized by transmitting the cleaning signal based on a preset schedule and / or by manual operation.

[0018] (4) Further, in the above (1) or (2), the fire detector is a photoelectric separation type smoke detector in which a light emitter and a light receiver having the window are arranged opposite to each other, the cleaning execution unit is provided on each of the light emitter and the light receiver, the cleaning instruction unit is characterized by receiving a light reception output transmitted from the light receiver, determining the degree of contamination of the window from the light attenuation rate based on the light reception output, and transmitting the cleaning signal for changing the number of operations and / or the operation speed of the wiper member according to the determined degree of contamination.

[0019] (5) The fire detector window cleaning system according to the present invention is for cleaning the window of a fire detector having a window through which light passes, and The fire detector is a photoelectric separation type smoke detector in which a light emitter and a light receiver having the window portion are arranged to face each other. a cleaning instruction unit provided in the light receiver for transmitting a cleaning signal; a cleaning execution unit provided in each of the light emitter and the light receiver for cleaning the window portion, and the cleaning execution unit includes a wiper member for cleaning the surface of the window portion, a drive unit for driving the wiper member, and a control unit for controlling the drive unit. The control unit receives the cleaning signal and drives and controls the drive unit based on the cleaning signal.

[0020] (6) Further, in the above (5), the cleaning instruction unit and the cleaning execution unit are configured to be separately attachable to an existing fire detector.

[0021] (7) Further, in the above (5) or (6), the cleaning instruction unit transmits the cleaning signal based on a preset schedule and / or by manual operation.

[0022] (8) Further, in the above (5) or (6), the cleaning instruction unit receives a light reception output transmitted from the light receiver, determines the degree of contamination of the window portion from the light attenuation rate based on the light reception output, and operates the wiper member according to the determined degree of contamination. And / or transmitting the cleaning signal for changing the operating speed. [Effect of the Invention]

[0023] Since the present invention operates the wiper member based on a cleaning signal transmitted from the cleaning instruction unit to remove dirt on the window portion, the window portion of a fire detector attached to a high place such as a hall or an atrium can be cleaned at low cost and easily. [Brief Description of the Drawings]

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0025] The fire detector window cleaning system according to the present invention is for cleaning the window portion of a fire detector having a window portion through which light passes. Examples of the fire detector include the above-described photoelectric separation type smoke detector and flame detector. In this embodiment, a fire detector window cleaning system for cleaning the window portion of a photoelectric separation type smoke detector will be described as an example.

[0026] FIG. 1 is a block diagram of a photoelectric separation type smoke detector equipped with the fire detector window cleaning system 1 of this embodiment and a fire receiver that communicates with it. As shown in FIG. 1, the fire detector window cleaning system 1 of this embodiment includes a cleaning instruction unit 5 provided in the fire receiver 3 for transmitting a cleaning signal, and a cleaning execution unit 9 provided in the photoelectric separation type smoke detector 7 for executing cleaning of the window portion. Prior to a detailed description of the fire detector window cleaning system 1, first, the configurations of the fire receiver 3 and the photoelectric separation type smoke detector 7 will be described.

[0027] As shown in FIG. 1, the photoelectric separation type smoke detector 7 is composed of a light transmitter 11 and a light receiver 13, and the light transmitter 11 and the light receiver 13 are arranged opposite to each other with their optical axes aligned at a high place such as a hall or an atrium. The light receiver 13 receives the light emitted by the light transmitter 11, and when the amount of received light is attenuated by the smoke of a fire, it transmits a fire signal to the fire receiver 3. Note that the power supplies of the light transmitter 11 and the light receiver 13 are supplied from, for example, the fire receiver 3.

[0028] The light transmitter 11 includes a light emitting element 17 that emits light 15, a light transmission side control unit 19 that controls the light emission of the light emitting element 17, and a transmission unit 21 that performs transmission with the light receiver 13. The light emitting element 17 is controlled by the light transmission side control unit 19 to emit light, for example, at a cycle of 3 seconds. On the front surface of the light transmitter 11, as shown in FIG. 2, a window portion 23 that allows the light 15 of the light emitting element 17 to pass through is provided. The window portion 23 is composed of a lens or the like and has a function of adjusting the diffusion of the light 15 emitted by the light emitting element 17 into parallel light.

[0029] The light receiver 13 includes a light receiving sensor 25 that receives the light 15 of the light emitting element 17, a light receiving side control unit 27 that measures the amount of light received by the light receiving sensor 25, and a transmission unit 29 that performs transmission with the fire receiver 3 and the light transmitter 11. A window portion 31 is provided on the front surface of the light receiver 13, and its appearance is substantially the same as the appearance of the light transmitter 11 shown in FIG. 2. The window portion 31 of the light receiver 13 is also composed of a lens or the like and has a function of focusing the light 15 sent from the light transmitter 11 onto the light receiving sensor 25.

[0030] The light emission timing of the light emitting element 17 and the light reception timing of the light receiving sensor 25 are synchronized via the transmission units 21 and 29, preventing false alarms caused by external light such as flash. Also, it is possible to prompt the light transmitter 11 to emit light from the light receiver 13 or transmit the light reception output of the light receiver 13 to the light transmitter 11.

[0031] When the light receiving sensor 25 of the light receiver 13 receives light, the light receiving side control unit 27 measures the amount of light received, converts the measured amount of light received into a voltage value, and transmits this value to the fire receiver 3. This value obtained by converting the amount of light received into a voltage value is called the light reception output.

[0032] The fire receiver 3 includes an LCD screen 33, an LCD interface (I / F) 35, a main control unit 37, and a transmission unit 39. The main control unit 37 has a function of determining whether there is a fire based on the light reception output transmitted from the light receiver 13. When the transmission unit 39 of the fire receiver 3 receives the light reception output from the light receiver 13, the main control unit 37 acquires this, compares it with the light reception output during normal times, and calculates the attenuation rate of the light 15. When this attenuation rate exceeds a predetermined threshold value, the main control unit 37 displays a fire indication on the LCD screen 33 via the LCD interface 35.

[0033] Although only one photoelectric separation type smoke detector 7 is shown in FIG. 1, a plurality of similar photoelectric separation type smoke detectors 7 (not shown) are connected to the fire receiver 3. Therefore, unique addresses are set for each of the light receivers 13, and the fire receiver 3 can identify the plurality of photoelectric separation type smoke detectors 7 by these addresses.

[0034] The fire detector window cleaning system 1 of the present embodiment is provided in the fire receiver 3 and the photoelectric separation type smoke detector 7 configured as described above, and cleans the window portion 23 of the light transmitter 11 and the window portion 31 of the light receiver 13. Hereinafter, the configuration of the fire detector window cleaning system 1 will be described.

[0035] The fire detector window cleaning system 1 of the present embodiment includes a cleaning instruction unit 5 provided in the fire receiver 3, and cleaning execution units 9 provided in the light transmitter 11 and the light receiver 13 of the photoelectric separation type smoke detector 7 which is a fire detector, respectively.

[0036] <Cleaning instruction unit> The cleaning instruction unit 5 is composed of a CPU and a memory, and transmits a cleaning signal by executing a program preset in the fire receiver 3, and instructs the cleaning execution unit 9 to perform cleaning. The transmission of the cleaning signal by the cleaning instruction unit 5 is performed in the following three patterns. (1) Preset schedule Based on a preset schedule such as once a week, a cleaning signal is periodically transmitted. (2) When a predetermined manual operation is performed on the LCD screen When a predetermined operation related to cleaning is performed on the LCD screen 33, a cleaning signal is transmitted. (3) When dirt on the window portion of the light transmitter or the light receiver is detected Based on the attenuation rate of the light 15 calculated from the light reception output of the light receiver 13, the degree of contamination of the window portions 23 and 31 is determined, and a cleaning signal is transmitted according to this degree of contamination. Specifically, as will be described later, the cleaning signal transmitted by the cleaning instruction unit 5 includes information specifying the number of operations and the operating speed of the wiper member 41 described later.

[0037] <Cleaning execution unit> The cleaning execution unit 9 includes a wiper member 41 for cleaning the surfaces of the window portions 23 and 31, a drive unit 43 for driving the wiper member 41, and a control unit 45 for controlling the driving of the drive unit 43. Similar cleaning execution units 9 are provided in the light transmitter 11 and the light receiver 13 respectively.

[0038] As shown in FIG. 2, the wiper member 41 is provided so as to extend to the front of the window portion 23 (or the window portion 31). A microfiber cloth 47 or the like for wiping off dirt is wound around the portion that contacts the window portion 23. The proximal end portion of the wiper member 41 is connected to a drive unit 43 constituted by a motor or the like. When the drive unit 43 is driven, the wiper member 41 performs a wiping operation on the window portion 23 (see the arrow in FIG. 2).

[0039] When the control unit 45 receives a cleaning signal from the cleaning instruction unit 5 via the transmission units 21 and 29, it controls the drive unit 43 based on this cleaning signal and operates the wiper member 41. As described above, since the cleaning signal includes information specifying the number of operations and the operating speed of the wiper member 41, the control unit 45 operates the wiper member 41 based on this. For example, when a cleaning signal of "once, low speed" is received, the drive unit 43 is controlled so that the wiper member 41 makes one round trip at low speed. Also, when a cleaning signal of "three times, high speed" is received, the drive unit 43 is controlled so that the wiper member 41 makes three round trips at high speed.

[0040] Regarding the operation of the fire detector window cleaning system 1 of the present embodiment configured as described above, specific examples will be given and described below. The cleaning by the fire detector window cleaning system 1 is executed according to any of the following three conditions.

[0041] <Periodic cleaning according to a preset schedule> In the cleaning instruction unit 5, a schedule for periodic cleaning, such as once a week, is preset. The cleaning instruction unit 5 transmits a cleaning signal of "once, low speed" once a week based on this schedule. This cleaning signal is received by the control units 45 on the side of the light emitter 11 and the light receiver 13 via the transmission units 21, 29, 39, and these control units 45 control the drive unit 43 respectively based on this cleaning signal so that the wiper member 41 operates one round trip at a low speed.

[0042] The cleaning signal transmitted based on the schedule is simultaneously transmitted to the control units 45 of all the opto-electronic separation type smoke detectors 7 connected to the fire receiver 3, and cleaning is performed by all the light emitters 11 and all the light receivers 13 respectively. As described above, by presetting a schedule for periodic cleaning in the cleaning instruction unit 5, the wiper members 41 of the light emitter 11 and the light receiver 13 operate automatically, and the dirt on the window portions 23, 31 is periodically removed.

[0043] <Cleaning by manual operation> By using input means (not shown) and performing a predetermined operation on the LCD screen 33 of the fire receiver 3, cleaning can be executed only on the cleaning execution unit 9 of a specific opto-electronic separation type smoke detector 7. On the LCD screen 33, when the address of the opto-electronic separation type smoke detector 7 to be cleaned is specified and a predetermined operation is performed, the cleaning instruction unit 5 transmits a cleaning signal of "three times, low speed" to the control units 45 of the light emitter 11 and the light receiver 13 of the specified opto-electronic separation type smoke detector 7. The number of times and the speed may be preset in advance, or may be selectable each time on the LCD screen 33.

[0044] Upon receiving the cleaning signal, the control units 45 of the light transmitter 11 and the light receiver 13 respectively control the drive unit 43 based on this cleaning signal so that the wiper member 41 operates three reciprocations at a low speed.

[0045] As described above, by means of the manual operation performed on the LCD screen 33, the window portions 23 and 31 of the light transmitter 11 and the light receiver 13 can be cleaned by designating a specific photo - electric separation type smoke detector 7.

[0046] <Automatic cleaning when detecting dirt on the window portion> As described above, in the fire receiver 3 of the present embodiment, the attenuation rate of the light 15 is calculated from the light receiving output of the light receiver 13 to perform a fire determination. However, this light receiving output also decreases when the window portion 23 of the light transmitter 11 or the window portion 31 of the light receiver 13 is dirty. Therefore, the cleaning instruction unit 5 of the present embodiment acquires the attenuation rate of the light 15 calculated by the main control unit 37, determines the degree of dirt on the window portions 23 and 31, and transmits a cleaning signal according to the degree of dirt. The determination of the degree of dirt and the transmission of the cleaning signal according to the degree of dirt are performed as follows.

[0047] Threshold values for dirt determination are set step - by - step in the cleaning instruction unit 5 to be smaller than the threshold value used by the main control unit 37 for fire determination in advance. If the threshold value for fire determination by the main control unit 37 is 50%, that is, when it is set to determine a fire when the attenuation rate of the light 15 exceeds 50%, the threshold values for dirt determination are set to 30%, 20%, and 10%. In this case, when the attenuation rate of the light 15 calculated by the main control unit 37 is 10% or less, the cleaning instruction unit 5 determines "no dirt"; when it exceeds 10% and is 20% or less, it determines "low degree of dirt"; when it exceeds 20% and is 30% or less, it determines "medium degree of dirt"; when it exceeds 30% and is 50% or less, it determines "high degree of dirt".

[0048] When the determination result is "no dirt", the cleaning instruction unit 5 continues to monitor for dirt. When the determination result is "low degree of dirt", the cleaning instruction unit 5 transmits a cleaning signal of "three times, low speed" to the control unit 45 of the photo - electric separation type smoke detector 7. When the determination result is "medium degree of dirt", the cleaning instruction unit 5 sends a cleaning signal of "5 times, low speed" to the control unit 45 of the photoelectric separation type smoke detector 7. When the determination result is "high degree of dirt", the cleaning instruction unit 5 sends a cleaning signal of "10 times, high speed" to the control unit 45 of the photoelectric separation type smoke detector 7.

[0049] When the control units 45 on the light emitter 11 side and the light receiver 13 side of the corresponding photoelectric separation type smoke detector 7 receive the above cleaning signal, each control unit 45 operates the wiper member 41 based on this cleaning signal. That is, when receiving a cleaning signal of "5 times, low speed", the wiper member 41 is operated to reciprocate 5 times at low speed, and when receiving a cleaning signal of "10 times, high speed", the wiper member 41 is operated to reciprocate 10 times at high speed.

[0050] As described above, by having the cleaning instruction unit 5 perform dirt determination based on the attenuation rate of the light 15, it is possible to detect when the window portions 23 and 31 are dirty and automatically clean them. Also, by providing threshold values for dirt determination step by step, the operation of the wiper member 41 can be changed according to the degree of dirt, and effective cleaning can be achieved.

[0051] In the above description, it has been described on the premise that the cleaning execution unit 9 is integrally configured with the light emitter 11 and the light receiver 13, but the present invention is not limited to this. The light emitter 11 and the light receiver 13 and the cleaning execution unit 9 can be configured separately, and the cleaning execution unit 9 can be separately attached to the light emitter 11 and the light receiver 13. Such an example is shown in FIG. 3.

[0052] The cleaning execution unit 49 shown in FIG. 3 is configured to be separately attachable to an existing photoelectric separation type smoke detector 7, and includes an attachment member 51 that can be attached to the top surface of the light emitter 11 or the light receiver 13. The driving unit 43 and the control unit 45 are housed inside the attachment member 51, and a wiper member 41 connected to the driving unit 43 is provided on the outer peripheral portion of the attachment member 51.

[0053] Although various methods for fixing the attachment member 51 to the light transmitter 11 or the light receiver 13 can be considered, for example, as shown in FIG. 3, insert nuts 53 may be provided at the four corners of the top surface of the light transmitter 11 or the light receiver 13, and the attachment member 51 may be screwed and fixed to the insert nuts 53. Further, after fixing the attachment member 51, it is preferable to be able to adjust the degree of adhesion between the wiper member 41 and the window portion 23 (or the window portion 31) at the base portion of the wiper member 41. Note that the power supply for the drive unit 43 and the control unit 45 accommodated in the attachment member 51 to operate may be supplied from an external power supply, or may be supplied from the fire receiver 3 in the same manner as the light transmitter 11 and the light receiver 13.

[0054] The cleaning execution unit 49 that can be separately attached to the light transmitter 11 and the light receiver 13 has a communication means (such as a wireless communication means) for communicating with the fire receiver 3 and a storage means for storing addresses and the like necessary for the communication, respectively. Therefore, the cleaning instruction unit 5 can specify the address of each cleaning execution unit 49 and transmit a cleaning signal, and the control unit 45 of the specified cleaning execution unit 49 can directly receive the cleaning signal from the cleaning instruction unit 5 without passing through the transmission units 21 and 29 of the light transmitter 11 and the light receiver 13.

[0055] By configuring the cleaning execution unit 49 as described above, it becomes possible to separately attach the cleaning execution unit 49 to an existing fire detector. In addition, since the cleaning execution unit 49 can be easily removed, it is also possible to replace only the cleaning execution unit 49 when the wiper member 41 is damaged or deteriorated, which is economical.

[0056] In FIG. 1, the photoelectric separation type smoke detector 7 of the type that performs a fire determination on the fire receiver 3 side is illustrated. However, there is also a type that performs a fire determination on the photoelectric separation type smoke detector 7 side and transmits a fire signal from the photoelectric separation type smoke detector 7 to the fire receiver 3 when a fire is determined. In the above type, since the light receiver 13 of the photoelectric separation type smoke detector 7 calculates the attenuation rate of the light 15 to perform a fire determination, as shown in FIG. 4, the cleaning instruction unit 5 may be provided in the light receiver 13. The operation of the fire detector window cleaning system 55 with the cleaning instruction unit 5 provided in the light receiver 13 is as follows.

[0057] <Regular cleaning according to a preset schedule> The operation related to regular cleaning is the same as that of the fire detector window cleaning system 1 in FIG. 1, except that the transmission unit 39 of the fire receiver 3 is not used for the communication of the cleaning signal.

[0058] <Cleaning by manual operation> By performing a predetermined operation using a remote control (not shown), etc., cleaning can be executed only on the cleaning execution unit 9 of a specific photoelectric separation type smoke detector 7. In this case, for example, by providing a signal receiving unit of the remote control in the light receiver 13, cleaning by manual operation can be performed as follows. When a remote control operation is performed on the light receiver 13 of a specific photoelectric separation type smoke detector 7, the cleaning instruction unit 5 of the light receiver 13 transmits a cleaning signal of "three times, low speed" to the control unit 45 of the light receiver 13 and the corresponding light emitter 11. Based on this cleaning signal, the control unit 45 controls the drive unit 43 so that the wiper member 41 operates three times back and forth at low speed.

[0059] As described above, the window portions 23 and 31 of the light emitter 11 and the light receiver 13 of a specific photoelectric separation type smoke detector 7 can be cleaned by manual operation using a remote control or the like.

[0060] <Automatic cleaning when dirt on the window portion is detected> In the photoelectric separation type smoke detector 7 of FIG. 4, since the light receiving side control unit 27 of the light receiver 13 calculates the attenuation rate of the light 15 to perform a fire determination, the cleaning instruction unit 5 acquires the attenuation rate of the light 15 calculated by the light receiving side control unit 27 to determine the degree of dirt on the window portions 23 and 31. Then, a cleaning signal corresponding to the degree of dirt is transmitted to the control unit 45 of the light receiver 13 and the corresponding light emitter 11, respectively. The determination of the degree of dirt and the transmission of the cleaning signal corresponding to the degree of dirt are the same as the methods described above.

[0061] The control unit 45 on the light receiver 13 side that has received the cleaning signal and the control unit 45 of the light transmitter 11 operate the wiper member 41 based on the cleaning signal.

[0062] As described above, when the light receiver 13 calculates the attenuation rate of the light 15 to perform a fire determination, by providing the cleaning instruction unit 5 in the light receiver 13, the operations related to the cleaning of the window portions 23 and 31 can be completed within the photoelectric separation type smoke detector 7.

[0063] Also in the above-described fire detector window cleaning system 55, as described with reference to FIG. 3, the light transmitter 11, the light receiver 13, and the cleaning execution unit 9 are configured separately, and the cleaning execution unit 9 can be separately attached to the light transmitter 11 and the light receiver 13. In that case, since the cleaning instruction unit 5 is housed in the attachment member 51 attached to the light receiver 13 side, it is advisable to provide a communication means between the cleaning instruction unit 5 and the light receiving side control unit 27 so that the cleaning instruction unit 5 can acquire the attenuation rate of the light 15.

[0064] By doing as described above, the fire detector window cleaning system 55 of FIG. 4 can also be separately attached to an existing fire detector.

[0065] As described above, in the present embodiment, based on the cleaning signal transmitted from the cleaning instruction unit 5, the wiper member 41 is operated to remove the dirt on the window portions 23 and 31. Therefore, even when the photoelectric separation type smoke detector 7 is attached at a high place such as a hall or an atrium, the window portions 23 and 31 can be cleaned at low cost and easily.

[0066] In addition, in the present embodiment, the case where the fire detector is a photoelectric separation type smoke detector is taken as an example. However, the fire detector window cleaning system in the case where the fire detector is a flame detector also has the same configuration as that in FIG. 1. That is, a cleaning instruction unit is provided in the fire receiver, a cleaning execution unit is provided in the flame detector, and the cleaning execution unit executes the cleaning based on the cleaning signal transmitted from the cleaning instruction unit, so that the window portion of the flame detector can be easily cleaned.

Explanation of Reference Numerals

[0067] 1 Fire detector window cleaning system 3 Fire receiver 5 Cleaning instruction section 7 Photoelectric separation type smoke detector 9 Cleaning execution section 11 Light emitter 13 Light receiver 15 Light 17 Light emitting element 19 Light emission side control section 21 Transmission section (light emitter) 23 Window section (light emitter) 25 Light receiving sensor 27 Light reception side control section 29 Transmission section (light receiver) 31 Window section (light receiver) 33 LCD screen 35 LCD interface 37 Main control section 39 Transmission section (fire receiver) 41 Wiper member 43 Driving section 45 Control section 47 Microfiber cloth 49 Cleaning execution section (other mode) 51 Mounting member 53 Insert nut 55 Fire detector window cleaning system (other mode)

Claims

1. A fire detector window cleaning system for cleaning a window portion of a fire detector having a window portion through which light passes, comprising: A cleaning instruction unit provided in a fire receiver for transmitting a cleaning signal; A cleaning execution unit provided in the fire detector for executing cleaning of the window portion; The cleaning execution unit includes a wiper member for cleaning the surface of the window portion, a driving unit for driving the wiper member, and a control unit for controlling the driving unit. The control unit receives the cleaning signal and drives and controls the driving unit based on the cleaning signal. A fire detector window cleaning system characterized by this.

2. The fire detector window cleaning system according to claim 1, wherein the cleaning execution unit is configured to be separately attachable to an existing fire detector.

3. The fire detector window cleaning system according to claim 1 or 2, wherein the cleaning instruction unit transmits the cleaning signal based on a preset schedule and / or by manual operation.

4. The fire detector is a photoelectric separation type smoke detector in which a light emitter and a light receiver having the window portion are arranged to face each other. The cleaning execution unit is provided in each of the light emitter and the light receiver. The cleaning instruction unit receives a light reception output transmitted from the light receiver, determines the degree of contamination of the window portion from the light attenuation rate based on the light reception output, and changes the number of operations and / or the operation speed of the wiper member according to the determined degree of contamination. The fire detector window cleaning system according to claim 1 or 2, characterized by transmitting the cleaning signal.

5. A fire detector window cleaning system for cleaning a window portion of a fire detector having a window portion through which light passes, comprising: The fire detector is a photoelectric separation type smoke detector in which a light emitter and a light receiver having the window portion are arranged to face each other. A cleaning instruction unit provided in the light receiver for transmitting a cleaning signal; A cleaning execution unit provided in the light transmitter and the light receiver respectively for cleaning the window portion, and comprising: The cleaning execution unit includes a wiper member for cleaning the surface of the window portion, a driving unit for driving the wiper member, and a control unit for controlling the driving unit. The control unit receives the cleaning signal and drives and controls the driving unit based on the cleaning signal. A fire detector window cleaning system characterized by this.

6. The fire detector window cleaning system according to claim 5, characterized in that the cleaning instruction unit and the cleaning execution unit are configured to be separately attachable to an existing fire detector.

7. The fire detector window cleaning system according to claim 5 or 6, characterized in that the cleaning instruction unit transmits the cleaning signal based on a preset schedule and / or by manual operation.

8. The fire detector window cleaning system according to claim 5 or 6, characterized in that the cleaning instruction unit receives the received light output transmitted from the light receiver, determines the degree of contamination of the window portion from the light attenuation rate based on the received light output, and transmits the cleaning signal for changing the number of operations and / or the operation speed of the wiper member according to the determined degree of contamination.

Images