JPH075971U - Overheat alarm device for large buses - Google Patents

Abstract

(57) [Summary] [Purpose] A small number of parts can be placed in the driver's seat without taking up space, and it is easy for bus occupants to visually recognize monitoring lights, overheat notification lights, and the like. [Structure] In the main engine room, thermal response sensors 11 to 1 that operate when the temperature of this room exceeds a predetermined temperature.
3 and thermal reaction sensors 21 to 23 which are activated when the temperature of the sub engine room exceeds a predetermined temperature. The driver's seat is provided with a monitoring light 45, overheat notification lights 46 and 47, and a buzzer 44. The controller 30 includes the sensors 11 to 1
3 and 21 to 23, when the line is abnormal, the monitoring lamp 45 blinks, when the sensors 11 to 13 operate, the overheat indicator lamp 46 blinks, and when the sensors 21 to 23 operate, the overheat indicator lamp 47 lights or blinks. Then, the buzzers 43 and 44 are caused to ring when the line is abnormal or the thermal response sensor is activated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an overheat alarm device used for a large bus, particularly a large bus traveling on a highway.

[0002]

[Prior art]

 Some large high-speed buses are equipped with an overheat alarm device to prevent problems caused by overheating of the running engine. Since a large bus for high-speed driving has a main engine for driving and a sub-engine for air equipment, it is necessary to equip two sets of over-heating warning devices for the main engine and the sub engine when equipped with an over-heat warning device. was there.

[0003]

[Problems to be solved by the device]

 If two sets of overheat warning devices are installed, not only two sets of controllers are required, but also the array of monitoring lights, overheat notification lights, etc. in the driver's seat and the number of reset switches, etc., are doubled. There was a problem that it was difficult to visually recognize the monitoring lights and overheat notification lights, and it was difficult to quickly respond when troubles such as overheating occurred. An object of the present invention is to provide an overheat warning device for a large bus, which can be placed in the driver's seat with a small number of parts and does not take up space, and which makes it easy for a bus occupant to visually recognize a monitoring light, an overheat warning light, and the like.

[0004]

[Means for Solving the Problems]

 A configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The alarm device of the present invention is provided in the main engine room and is activated when the temperature of the room exceeds a predetermined temperature. The second thermal response sensors 21 to 23 that operate when the temperature exceeds a predetermined temperature, and the monitoring lamp 45 that blinks when there is an abnormality in the line connected to the first and second thermal response sensors 11 to 13 and 21 to 23 provided in the driver's seat. And a first overheat indicator lamp 46 provided in the driver's seat and blinking when the first thermal response sensors 11 to 13 are activated, and a second overheated indicator lamp 46 provided in the driver's seat that is illuminated or blinks when the second thermal response sensors 21 to 23 are activated. Overheat notification light 47, buzzers 43 and 44 that sound when the line is abnormal, when the first thermal response sensor is operating or when the second thermal response sensor is operating, first thermal response sensors 11 to 13 and second thermal response Motion sensor 21- And a controller 30 for turning on or blinking the monitoring lamp 45, turning on or off the first or second overheat notification lamp 46 or 47, or for turning on the buzzers 43, 44 based on the output of 3. Is.

[0005]

[Action]

 When either or both of the thermal response sensors 11 to 13 and 21 to 23 are activated due to overheating of the engine room or the like, the controller 30 turns on or blinks either or both of the overheat notification lights 46 and 47. When the lights are turned off and the buzzers 43 and 44 are sounded, and either or both of the lines connected to the both thermal response sensors 11 to 13 and 21 to 23 are disconnected, the controller 30 blinks the monitoring lamp 45 and the buzzers 43 and 4 are activated. Ring 4

[0006]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. Although not shown, a large bus for high-speed travel will be equipped with a main engine for travel and a sub-engine for air equipment such as an air conditioner press. As shown in FIG. 1, a heat responsive assembly 10 is installed in the main engine room, and a heat responsive assembly 20 is installed in the sub engine room. In this example, the heat-responsive assembly 10 is provided with three heat-responsive sensors 11, 12 and 13 which are NTC thermistors, and the heat-responsive assembly 20 is provided with three heat-responsive sensors 21, 22 and 23 which are NTC thermistors. To be 14 and 24 are terminating resistors. These thermal response sensors 11 to 13 and 21 to 23 are installed at intervals in an enclosure (not shown) near exhaust system components forming the engine room, and the ambient temperature surrounding the sensors is predetermined. When the temperature reaches (for example, about 130 ° C.), its resistance value is suddenly reduced.

The output terminals 16 and 26 of the thermal actuator assemblies 10 and 20 are connected to the CPU 32 through an interface 31 of a controller 30 which is a microcomputer. The controller 30 is provided in the driver's seat. A power supply circuit 33 is connected to the CPU 32, and a battery 40 is connected to the power supply circuit 33 via a fuse 41 and a key switch 42. The CPU 32 is connected to the external buzzer 43 via the first drive circuit 34, and is connected to the internal buzzer 44, the monitoring light 45, the first overheat notification light 46 and the second overheat notification light 47 via the second drive circuit 36. It The external buzzer 43 is attached to a room (not shown) where the shift driver rests. The monitoring light 45 lights up or blinks in green, and the overheat notification lights 46 and 47 light up or blink in red. These indicator lights 45 to 47 are compactly provided on a display panel 50 of an instrument panel (not shown) in the driver's seat. The display panel 50 is provided with a reset switch 48 and a muffling switch 49, and these switches 48 and 49 are connected to the interface 31 of the controller 30.

A memory 37 is connected to the CPU 32. The operation mode of Table 1 is stored in the memory 37. That is, a program for the output mode of Table 1 is stored in the memory 37, and when the input mode of Table 1 is input to the controller 30, the CPU 32 follows the program to monitor the lights 45, the overheat notification lights 46 and 47, In addition, the buzzer 44 is activated. The control contents of the controller 30 in each mode will be described below.

[0009]

[Table 1]

(A) During monitoring: During normal monitoring, the green monitoring lamp 45 is turned on, the overheat notification lamps 46 and 47 are extinguished, and the buzzer 44 is stopped. The reset switch 48 is valid and the mute switch 49 is invalid.

(B) At the time of alarm (No. 1): The main engine room is abnormally heated due to overheating, etc., and any one or more of the thermal response sensors 11 to 13 detects a predetermined temperature and the resistance thereof is detected. When the value decreases, the first overheat notification lamp 46 blinks in red at a certain frequency based on the oscillator built in the controller 30. The external buzzer 43 and the internal buzzer 44 also ring in synchronization with this blinking. The second overheat notification lamp 47 is turned off. The reset switch 48 is inactive, and the mute switch 49 is active. Pressing the mute switch 49 will stop the buzzers 43 and 44, and pressing it again will ring again.

(C) At the time of alarm (No. 2): The sub-engine room is abnormally heated due to overheating, etc., and any one or more of the thermal response sensors 21 to 23 detect a predetermined temperature and detect its resistance. When the value decreases, the second overheat notification lamp 47 lights up in red. The external buzzer 43 and the internal buzzer 44 ring at a certain constant frequency. The first overheat notification lamp 46 is turned off. The reset switch 48 is inactive and the mute switch 49 is active. When the mute switch 49 is pressed, the buzzers 43 and 44 stop, and when it is pressed again, the buzzer sounds again.

(D) When alarm is held: When the temperature of the engine room is lowered and the thermal response sensors 11 to 13 or 21 to 23 are restored, the reset switch 48 is changed to be effective and the alarm time (a) and Hold the state of (b). Here, if the bus occupant or the like presses the reset switch 48, the state (a) for monitoring is restored. In Table 1, the values in parentheses indicate the case when the alarm (No. 2) is held.

(E) Alarm holding / disconnection: When an alarm (part 1) or the alarm is held, when the line composed of the wire harness connecting the first thermal response assembly 10 and the controller 30 is disconnected, The monitor lamp 45 blinks at a certain frequency, the overheat indicator lamp 46 also blinks at the same frequency, and the overheat indicator lamp 47 is turned off. The buzzers 43 and 44 also intermittently ring at the same frequency. In the event of an alarm (No. 2) or when the alarm is held, when the line composed of the wire harness connecting the second thermal responsive assembly 20 and the controller 30 is broken, the monitoring light 45 blinks at a certain frequency, The overheat notification lamp 46 is turned off and the overheat notification lamp 47 is turned on. The buzzers 43 and 44 also intermittently ring at the same frequency. In either case, the reset switch 48 is invalid and the mute switch 49 is valid. When the mute switch 49 is pressed, the buzzers 43 and 44 stop, and when it is pressed again, the buzzer sounds again.

(F) Normal disconnection: When the circuit of either or both of the first thermal response assembly 10 and the second thermal response assembly 20 is disconnected during normal times when the alarm light is not in an alarm state, the monitoring lamp 45 has a constant circumference. It blinks at the wave number, the overheat notification lights 46 and 47 are turned off, and the buzzers 43 and 44 also ring at the same frequency. The reset switch 48 is invalid, and the mute switch 49 is valid. When the mute switch 49 is pressed, the buzzers 43 and 44 stop, and when it is pressed again, the buzzer sounds again.

(G) At the time of test: When performing an operation test at the time of monitoring, the reset switch 48 is pushed. The alarm state is set only while the switch is pressed, and the monitor state is restored when the switch 48 is released.

In the above example, the second overheat notification lamp 47 is turned on when the sub engine room is in an abnormal state, but instead of being turned on, the second overheat notification lamp 47 may be blinked when an abnormality occurs, like the first overheat notification lamp 46. Good. Although the NTC thermistor is used as the thermal response sensor, a PTC thermistor whose resistance value rapidly increases when the ambient temperature surrounding the sensor reaches a predetermined temperature may be used. Further, although the controller is composed of a microcomputer, it may be composed of a logic circuit.

[0018]

[Effect of device]

 As described above, according to the present invention, two thermal response assemblies are connected to a single controller, and a common buzzer notifies these states of these conditions and a monitoring lamp monitors them. The number of monitoring lights in the seats and the number of reset switches, etc. are only one for each, which reduces the installation space in the driver's seat and makes it easy for bus occupants to visually recognize the monitoring lights, overheat warning lights, etc. It is possible to quickly respond to problems such as time.

[Brief description of drawings]

FIG. 1 is an electric circuit configuration diagram of an overheat alarm device for a large-sized bus according to an embodiment of the present invention.

[Explanation of symbols]

 10 First Thermal Response Assembly 11, 12, 13 First Thermal Response Sensor 20 First Thermal Response Assembly 21, 22, 23 Second Thermal Response Sensor 30 Controller 43, 44 Buzzer 45 Monitoring Light 46 First Overheat Notification Light 47 Second Overheat indicator light

Claims (1)

[Scope of utility model registration request] 1. A first thermal response sensor (11 to 13) provided in a main engine room and operating when the temperature of the room exceeds a predetermined temperature, and a temperature of the room provided in the sub engine room to a predetermined temperature. Second thermo-responsive sensor (21-23) that operates when the temperature exceeds
And the first and second thermal response sensors (11-1
Monitoring light (45) that blinks when there is an error in the line connected to (3,21-23)
Of the first thermal response sensor (11 to 13) provided in the driver's seat and blinking when the first thermal response sensor (11 to 13) is activated, and the second thermal response sensor (21 to 23) provided in the driver's seat. A second overheat indicator light (47) which lights up or blinks when operating, a buzzer (43, 44) which sounds when the line is abnormal, the first thermal response sensor is operating or the second thermal response sensor is operating, 1 thermal response sensor (11 ~ 13) and 2nd thermal response sensor (21
~ 23) based on the output of the monitoring light (45) to turn on or blink, the first or second overheat notification light (46,47) to turn on, blink or turn off, or the buzzer (43,44) An overheat alarm device for a large bus equipped with a controller (30) for ringing.