JPH05319719A - Automatic floor reaching device at power failure time for elevator - Google Patents

Abstract

PURPOSE:To realize rescue operation with a low-priced small battery by equipping a temperature detector and a heater at the perimeter of the battery provided in an elevator machine room, retaining the perimeter temperature of the battery within the range of a predetermined temperature at all times. CONSTITUTION:When the temperature in an elevator machine room is high, for example, 35 deg.C, the contact point of a temperature sensor 21 becomes OFF, and electrification to a heater 22 is cut off, so the perimeter temperature of a battery 8 is approximately equal to that of the machine room. At this time, if power failure occurs, rescue operation is conducted, and although the battery 8 is discharged, the perimeter of the battery temperature is about 35 deg.C, so the battery 8 functions normally. Also, when the temperature in the machine room, is low, for example, 0 deg.C, the contact point of the temperature sensor 21 becomes ON, so the heater 22 is electrified, and the perimeter of the battery 8 is heated. When the perimeter temperature of the battery 8 reaches 25 deg.C, the contact point of the temperature sensor 21 becomes OFF, and electrification to the heater 22 is cut off. These heating and heating stoppage are repeated, and the perimeter temperature of the battery 9 is retained between 20-25 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator automatic landing system during a power failure.

[0002]

2. Description of the Related Art When an electric power failure occurs during operation of an elevator, the car of the elevator may stop in the middle of each floor, and passengers in the car may be trapped in the car. In order to prevent this, an automatic landing system at the time of power failure has been developed that switches the power supply to the battery when a power failure occurs and operates the elevator by the battery to rescue passengers, and is widely installed and used in elevators to ensure the safety of passengers. Has been done.

FIG. 2 shows a control circuit of a conventional elevator equipped with the above-mentioned automatic floor landing device during a power failure. In the figure, 1 is a power supply, 2 is a control device, 3 is a main circuit contactor, 4 is an electric motor, 5
Is a main sheave, 6 is an elevator car, 7 is a counterweight, 8 is a battery power source, 9 is a rescue operation device, 10 is a rescue operation contactor, 11 is an elevator control panel, and 12 is an automatic landing device during a power failure. In the above elevator, as shown in FIG. 3, an penthouse type machine room 14 is installed on the roof of a building 13, and an elevator control panel in which the controller 2 and the main circuit contactor 3 are arranged in the machine room 14. 11 and
Battery power source 8, rescue operation device 9, rescue operation contactor 10
And the automatic flooring device 12 at the time of power failure, which is arranged with the electric motor 4
And are stored.

Next, the operation will be described. During normal operation, the main circuit contactor 3 is turned on and the elevator is operated using the power supply 1, but during a power failure, the main circuit contactor 3 is turned off.
It is set to F, the rescue operation contactor 10 is turned on, the electric motor 4 is operated by the battery power source 8 via the rescue operation contactor 10, and the car 6 is driven to arrive at the nearest floor to rescue passengers.

[0005]

By the way, in the penthouse type machine room 14 of the above conventional elevator,
A suitable intake port and a ventilation fan are provided in the machine room in order to suppress a temperature rise due to heat generation of devices such as the electric motor 4 and the control device 2 in the machine room 14 when the temperature in summer is high. However, in such a machine room 14, the area (cold area,
The temperature is 0 due to differences such as temperate zone, tropical zone, season, and time zone (elevator frequency, morning, day, night, etc.).
It changes from ℃ to about 40 ℃. On the other hand, since the battery utilizes a chemical reaction, its discharge characteristics change drastically depending on the temperature, and the lower the temperature, the lower the terminal voltage and the lower the apparent discharge capacity. For example, the graph in FIG.
Fig. 4 shows constant current discharge (50A and 100A) characteristics of a lead battery of V and 40AH capacity at ambient temperatures of 20 ° C and -10 ° C. The battery 8 is the elevator machine room 1
Since the characteristics are changed when the ambient temperature changes, and when a low temperature power failure occurs, the apparent discharge capacity may be insufficient and the operation for rescue of passengers may become impossible. If a battery with a large discharge capacity is used in order to avoid this, the specifications will become large and the cost will increase, which is not preferable.

The present invention has been made to solve the above-mentioned problems in the conventional passenger rescue device for an elevator.
The present invention aims to provide an automatic landing system during an electric power failure of an elevator that can reliably perform rescue operation with a low-priced small battery.

[0007]

In order to achieve the above-mentioned object, an automatic landing system during an electric power failure of an elevator according to the present invention comprises:
A temperature detector and a heater are provided around the battery installed in the elevator machine room so that the ambient temperature of the battery is always kept within a predetermined temperature range.

[0008]

By constantly maintaining the ambient temperature of the battery at a predetermined temperature, the discharge characteristics of the battery are always kept substantially constant, and the discharge capacity of the battery does not become insufficient.

[0009]

【Example】

Embodiment 1 FIG. 1 is a block diagram of an elevator control apparatus showing an embodiment of the present invention. In the figure, 1 to 12 are the same or corresponding parts as a conventional apparatus, 21 is a temperature sensor, and 22 is a heater. The temperature sensor 21 is configured to turn on at 20 ° C. or lower and turn off at 25 ° C. or higher, for example. The heater 22 made of a resistor is arranged near the battery 8 and the temperature sensor 2
When the contact No. 1 is ON, it is energized to heat the periphery of the battery 8, and when the contact of the temperature sensor 21 is OFF, the energization is cut off and the heating of the periphery of the battery 8 is stopped. The automatic landing device during power failure according to the present invention is configured as described above.

Next, the operation will be described. When the temperature in the elevator machine room 14 is high, such as 35 ° C. in the summer or when the elevator is activated frequently, the contact of the temperature sensor 21 is turned off.
Since the electricity to the heater 22 is cut off, the ambient temperature of the battery 8 is almost equal to the temperature inside the machine room 14.
If a power failure occurs at this time, the rescue operation is performed as described above, and the battery 8 is discharged. However, since the ambient temperature of the battery 8 is about 35 ° C., the battery 8 operates normally and the rescue is smoothly performed. When the temperature inside the elevator machine room 14 is low, for example, 0 ° C. during cold weather such as winter, the contact point of the temperature sensor 21 is ON, so the heater 22 is energized and the periphery of the battery 8 is heated. .. When the ambient temperature of the battery 8 reaches 25 ° C., the contact point of the temperature sensor 21 becomes OF.
It becomes F, and the power supply to the heater 22 is cut off. This heating and the heating stop are repeated, and the ambient temperature of the battery 8 becomes 20
Hold between ~ 25 ° C. Therefore, even if the temperature in the machine room 14 is low, such as in the winter, the ambient temperature of the battery 8 and thus the temperature of the battery 8 are maintained at an appropriate temperature. Therefore, even if a power failure occurs in the winter, the battery 8 is well discharged. Characteristic is obtained, and rescue operation is performed without trouble.

In addition, according to the automatic landing system at the time of power failure according to the present invention, when the temperature inside the machine room 14 is the minimum temperature of -10 ° C.
Since the ratio of the required capacity AH of the battery 8 is about 3: 2 at 0 ° C., the battery is downsized as compared with the conventional automatic landing apparatus at the time of power failure, and therefore the cost can be reduced. The heater 22 is preferably explosion-proof.

Embodiment 2 In the above embodiment, the temperature sensor 21 is arranged around the battery 8. However, a non-contact type temperature sensor is arranged in the battery case of the battery 8 to detect the temperature of the electrolysis station. The heater 22 may be turned ON / OFF by the output. Further, the heater 22 is not limited to a resistor and may be of another type.

[0013]

As described above, the present invention provides an elevator automatic landing system during a power failure, comprising a temperature detector around the battery and a heater for heating the periphery of the battery, and keeps the temperature around the battery within a predetermined temperature range at all times. As a result, it is possible to maintain a good battery discharge state throughout the four seasons, to ensure reliable rescue operation during power outages, and at the same time, to achieve the excellent effect of making the battery smaller and therefore lower in price. It became a thing.

[Brief description of drawings]

FIG. 1 is a block diagram of an elevator control device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional elevator control device.

FIG. 3 is a front view showing a device arrangement in a conventional elevator machine room.

FIG. 4 is a chart showing discharge characteristics with respect to ambient temperature of a battery.

[Explanation of symbols]

 21 ... Temperature sensor 22 ... Heating device

Claims (1)

[Claims] 1. An automatic power failure landing apparatus for an elevator, comprising a main power supply and a battery, and configured to automatically switch the main power supply to the battery during a power failure to operate the elevator. A temperature detector is provided around the battery. An elevator automatic grounding apparatus during a power failure, comprising: a heater and a heater, and configured to keep the ambient temperature of the battery within a predetermined temperature range at all times.