JP3437001B2 - Operation monitoring device for passenger seat heater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation monitoring device for a passenger heater provided for each seat.

[0002]

2. Description of the Related Art In a railway vehicle, a passenger seat heater is provided for each seat by a seas line to warm passengers in winter. A large number of passenger heaters are installed even in one vehicle to meet the capacity. Conventionally, whether or not the sheath wire of this passenger heater is broken has been regularly checked one by one. .

[0003]

However, in such a conventional technique, since the sheath wire is installed under the seat in a difficult-to-see place, the inspection is not easy and the disconnection can be detected early to improve the serviceability. If it is attempted to improve the cost, the maintenance cost will increase and the cost will increase, and if the maintenance cost is spared, the serviceability will be deteriorated.

The present invention has been made by paying attention to the problems of the prior art as described above, and can easily detect the disconnection of the sheath wire of the passenger heater, improve the maintainability and reduce the cost. It is an object of the present invention to provide an operation monitoring device for a passenger heater, which is capable of improving serviceability by detecting disconnection of a sheath wire early and performing maintenance while making it low.

[0005]

The gist of the present invention for achieving the above object resides in the inventions of the following items.

A passenger seat heater (1
1, 12 ...) operation monitoring device (10), each of which is provided with a thermal switch (21, 22 ...) which is turned off when a heat is sensed, in proximity to the heat generating portion of each seat heater (11, 12 ...). The heat-sensitive switches (21, 22 ...) Are arranged in parallel, a detection voltage is applied, and the wirings connected in parallel are guided,
An operation monitoring device for a seat heater, comprising: a monitoring unit (30) which detects a voltage when the detected voltage is energized and stops detecting the voltage when all the heat sensitive switches (21, 22 ...) Are turned off.

2. In the seat heater operation monitoring device (10) according to item 1, the heat sensitive switch (2) of each seat heater is used.
1, 22 ...) and a detection lamp (26) that is turned on by the detection voltage are connected in series to the seat heater operation monitoring device.

[0008]

The operation monitoring device (10) collectively monitors the normal operation of the passenger heaters (11, 12 ...) provided for each seat, and immediately detects any abnormality. is there. That is, when the power of the passenger heaters (11, 12 ...) Is turned on, the thermal switch (21, 12,
22 ...) are all turned on, and a current flows due to the voltage applied to the whole of the heat-sensitive switches (21, 22 ...) Connected in parallel, and the detection voltage caused thereby is detected.

After a lapse of a predetermined time, the heat generating portion of the sheath wire becomes high in temperature, and the heat sensitive switches (21, 22 ...) Adjacent to each other are turned off. All seat heaters (1
When the temperature of 1, 12, ...) is normally high, all the heat-sensitive switches (21, 22 ...) Arranged in parallel are turned off.
Since no current flows due to the voltage applied to the entire heat-sensitive switches (21, 22 ...) Connected in parallel, no detection voltage is generated, and therefore the heaters (11, 12) for the passenger seats are provided.
...) can be confirmed to be all normal.

If there is a heater (11, 12) in one place,
If the sheath wire of (...) Is disconnected, current flows through the heat-sensitive switch (21, 22 ...) At that location due to the applied voltage even after a predetermined time has elapsed, and the detected voltage is detected. This indicates abnormal operation. Since it suffices to inspect only when such an abnormal operation is detected, the labor of maintenance is greatly reduced.

When a detection lamp (26) which is turned on by a detection voltage is connected in series with the heat-sensitive switches (21, 22 ...) Of the heaters (11, 12 ...) Of the passenger seats, the seat is detected when an abnormal operation occurs. By visually observing the lamp (26), the detection lamp (26) is lit at the place where the current is flowing, so that the defective place can be found immediately.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Each drawing shows an embodiment of the present invention. The operation monitoring device 10 monitors the passenger seat heaters provided for each seat as a whole.

FIG. 1 is a circuit diagram showing a heater-related arrangement in one vehicle. The passenger heaters 11, 11, ... And 12, 12 ... Power supply wirings 13a to 13f for each system are branched and connected to the main wirings 14a to 14c. Branch ground wires 15a to 15c are connected to the ground side of the passenger heaters 11, 12, ..., And trunk ground wires 16a to 16c are connected to the branch ground wires 15a to 15c through fuses 17a to 17c.

Heat-sensitive switches 21, 21 ... And 22, 22 ..., which are thermostats that are turned off when heat is sensed, correspond to the left and right passenger seat heaters 11, 12 ,. Is provided.

The heat sensitive switches 21, 22 ... Are arranged in parallel and arranged, and the wirings 23a, 2 are connected in parallel.
3b, 24a, 24b are connected to the detection lines 25a, 25b. The detection lines 25a and 25b extend to the monitoring unit 30.

As shown in FIG. 2, a detection lamp 26 which is turned on by a detection voltage is connected in series with the heat sensitive switches 21, 22 ... Of each seat heater.

The monitoring unit 30 includes a detection power source 31 connected in series to the detection lines 25a and 25b, a detection resistor 32 to which a detection voltage from the detection power source 31 is applied, and a meter 33 that detects the voltage when the detection voltage is energized. And. The meter 33 does not detect the voltage because the detection voltage does not flow to the detection resistor 32 when all the heat sensitive switches 21, 22, ... Are turned off.

Next, the operation will be described. Operation monitoring device 10
... collectively monitors that the passenger seat heaters 11, 12, ... Provided for each seat are operating normally, and immediately detects any abnormality. When the passenger's seat heaters 11, 12, ... Are turned on by the main switch in the driver's seat (not shown), the main wirings 14a-14c to the power supply wirings 13a-13
Power is supplied to the passenger heaters 11, 12, ... Through f, and if normal, all the passenger heaters 11, 12, ... Start heating as shown by the temperature curve a in FIG. While the temperature is not rising, all the heat sensitive switches 21, 22 ... Are turned on, and the monitoring unit 30
Then, according to the voltage of the detection power supply 31 applied to the entire heat-sensitive switches 21, 22 ...
A current flows through the sensor 33, and the detection voltage induced thereby is detected by the meter 33.

Although there is some variation in the temperature rise due to the intersection of the environment and the performance of the installation parts of the passenger heaters 11, 12, ...
When a predetermined time elapses as shown by an elapsed time b in FIG. 3, the heat generating portion of the sheath wire becomes high in temperature, and the heat sensitive switches 21, 22 ... Proximately provided are turned off. When all the passenger heaters 11, 12, ... Have a normal high temperature, all the heat sensitive switches 21, 22 ... Which are arranged in parallel are turned off. After this time, as shown in FIG. 3, the energization to the passenger seat heaters 11, 12, ... Is turned on / off by the operation of RHEK, and is controlled so as to maintain a predetermined temperature range.

Thermal switches 21, 22 ... Connected in parallel
Since the current due to the voltage applied to the whole does not flow, the detection power supply 31 does not energize the detection resistor 32, and the detection voltage does not occur in the meter 33.
It can be confirmed that all the passenger heaters 11, 12, ... Are normal.

If, even in one place, the seat heaters 11, 12, ...
If the sheath wire of is broken,
One of the heat sensitive switches 21, 22 ... does not turn off,
Depending on the voltage of the detection power supply 31 applied, a current flows from the wiring to the detection resistor 32 through any one of the heat sensitive switches 21, 22 ... At that location, the detection voltage is detected by the meter 33, which indicates an abnormal operation. Will be there.

When this abnormal operation occurs, the detection lamp 26 of the seat is visually inspected, and at the abnormal position, the detection voltage connected in series with the heat-sensitive switches 21, 22 ... Of the heaters 11, 12 ,. The detection lamp 26, which is lit by, continues to be energized, and the detection lamp 26 is lit at the place where the current is flowing, so that the defective place can be found immediately.

It should be noted that at least an abnormality can be detected without providing a detection lamp, and the inspection can be performed only when such an abnormal operation is detected, so that the maintenance labor can be greatly reduced.

[0024]

According to the operation monitor for a passenger heater according to the present invention, it is possible to easily detect the disconnection of the sheath wire of the passenger heater. Therefore, the maintainability is improved and the cost is reduced. The serviceability can be improved by detecting disconnection of the sheath wire early and performing maintenance. In the case where the detection lamp is provided, detection becomes easier and maintainability is further improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a passenger seat heater operation monitoring device according to an embodiment of the present invention.

FIG. 2 is a partial circuit diagram showing a connection state of detection lamps of an operation monitoring device for a passenger seat heater according to an embodiment of the present invention.

FIG. 3 is a diagram showing an operation state of an operation monitoring device for a passenger seat heater according to an embodiment of the present invention.

[Explanation of symbols]

10 ... Operation monitoring device 11,12 ... Heater heater 21,22 ... Thermal switch 26 ... Detection lamp 30 ... Monitoring unit 31 ... Detection power supply 32 ... Detection resistance 33 ... Meter

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B61D 27/00

Claims (2)

(57) [Claims] 1. An operation monitoring device for a passenger heater provided for each seat, wherein a heat sensitive switch that is turned off when a heat is sensed is provided in the vicinity of a heat generating portion of each passenger heater, and the heat sensitive switches are arranged in parallel. It is characterized in that a monitoring unit is provided to which a detection voltage is applied, guide the wirings connected in parallel, detect the voltage when the detection voltage is energized, and stop detecting the voltage when all the heat-sensitive switches are turned off. Seat heater operation monitoring device. 2. The operation monitoring device for a seat heater according to claim 1, wherein a detection lamp that is turned on by the detection voltage is connected in series with a heat-sensitive switch of each seat heater.