JPH05105350A - Automatic drainage system for elevator - Google Patents

Abstract

PURPOSE:To provide an air conditioner installed elevator enabling the drain of water without stopping the elevator and preventing the immersion of water without opening a hole in a pit by providing a drainage pump connected to a drain pipe and started/stopped by the signal output of the level sensor of a pit drain tank. CONSTITUTION:A pit drain tank 3 provided with level sensors 2, 2 for detecting the upper and lower limit of the water level is installed in a pit 1 in an elevating path, and drain pipe 5 is provided at the lowest floor ceiling part 4 of a building above the pit 1. A drainage pump 6 is provided at the intermediate part of the drain pipe 5, and the tip of the drain pipe 5 is connected to a scupper 7. The output of the level sensor 2 is inputted into the drive control device of the drainage pump 6 so as to start/stop the drainage pump 6 according to the sensor output signal. When the water collected in the pit drain tank 3 becomes full, this is detected by the upper limit level sensor 2, and the drainage pump 6 is put in action by this output so as to drain the water in the tank automatically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic drainage device for an air conditioner installed elevator.

[0002]

2. Description of the Related Art In a conventional elevator having an air conditioner installed in a car, the drainage method of the air conditioner drainage to the outside of the hoistway is to collect the drainage from the car in a drain tank provided in the pit, On the day of maintenance and inspection, the elevator car was stopped on the middle floor, water was pumped up with a bucket, and drainage work was performed until the water ran out.

At times, there are buildings without drain tanks in the pits, and even in that case, the water accumulated in the pits was pumped up by a bucket, and a lot of work was done until the water in the pits was exhausted.

As a special example, a drain pipe is provided from the drain tank in the pit to the outside of the pit to automatically drain water.

In this case, since a hole-penetrating portion is formed in the pit, a check valve or other water backflow prevention device is required.

[0006]

The drainage method of such an air conditioner-equipped elevator has the following problems.

First, when the water collected in the drain tank or the pit is pumped out, it is limited to the day when the elevator is inspected, and it cannot be pumped out unless the elevator is stopped. The effort and time were also great.

Even when a drain pipe is provided from the drain tank in the pit to the outside of the pit, a penetration portion is formed in the pit due to a hole, so that water cannot be completely prevented from entering the pit. Water could flow back into the pit, and a check valve was needed to prevent this.

The present invention has been made to solve this problem, and it is possible to drain water at any time when water is accumulated in the drain tank in the pit without stopping the elevator.

Another object of the present invention is to provide an air conditioner-equipped elevator that completely prevents water from entering without making a hole in the pit.

[0011]

According to the present invention, a pit drain tank having level sensors at the upper and lower limits of the water level is installed in the hoistway pit, and drainage is provided from the lowest floor above the pit. Pipe the pipe and install a drainage pump.

The output of the level sensor is input to the drive control device of the drainage pump, and the start / stop of the drainage pump is controlled according to the sensor output.

[0013]

[Function] When the water accumulated in the pit drain tank becomes full, when the upper limit level sensor detects this, the output causes the drainage pump to operate, and the water in the tank is automatically drained. Further, when the lower limit level sensor detects that the water in the tank is exhausted, the output thereof automatically stops the drainage pump.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiment shown in FIG.

Pit drain tank 3 provided with level sensors 2 and 2 for detecting upper and lower limits of water level in a pit 1 in a hoistway
Is installed, and a drainage pipe 5 is provided on the ceiling part 4 on the lowest floor of the building above the pit. A drainage pump 6 is provided in the middle of the drainage pipe 5, and the tip of the drainage pipe is connected to a drainage port 7.

The output of the level sensor 2 is input to the drive control device of the drainage pump 6, and according to the sensor output signal,
The drain pump 6 is started and stopped.

On the other hand, an air conditioner 9 is attached to the car 8, and a car drain tank 10 is provided at the bottom of the car. A float switch 11 detects that the car drain tank 10 is full, and the air conditioner 9 is stopped by the signal. 8 is stopped at the bottom floor, and the water accumulated in the car drain tank 10 is drained to the pit drain tank 3 by operating the solenoid valve 12.

The level sensor 2 detects the water level of the waste water thus stored in the pit drain tank 3 and automatically drains it.

As the level sensor 2, a float type level meter having a magnet is attached to the pit drain tank,
On the other hand, reed switches are provided at the upper limit water level and the lower limit water level, and the level switch is used as a sensor.

As a level sensor by another method,
A float switch, an electrode type level meter, an optical sensor or the like may be used.

With such a structure, the pit drain tank is automatically drained when water is accumulated, and there is no need to stop the elevator because of drainage in the pit, facilitating maintenance and inspection of the elevator. Become.

Since the drainage pipe is piped from the lowest floor above the pit, it is not necessary to provide a hole for piping in the pit,
It can completely block the entry of water into the pit.

[0023]

According to the present invention, the drainage of the air conditioner in the hoistway pit can be automatically drained at all times, which saves the trouble of maintenance and inspection.
In addition, problems such as submerging the hoistway pit with water are also eliminated.

[Brief description of drawings]

1 is a schematic view of an elevator according to the present invention.

[Explanation of symbols] 1 ... Pit 2 ... Level sensor 3 ... Pit drain tank 5 ... Drain pipe 6 ... Drain pump

Claims (1)

[Claims] 1. An elevator for draining an air conditioner installed in a car in a pit at the bottom of a hoistway, wherein a pit drain tank having upper and lower limit level sensors is provided in the pit, and the tank is at the lowest floor above the pit. An automatic drainage device for an elevator, characterized in that a drainage pipe is connected to the water distribution pipe, and a drainage pump is started and stopped by the signal output of the level sensor.