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Elevator air pressure control device

A technology of air pressure control and control device, which is applied to elevators, transportation and packaging in buildings, etc., can solve the problems of increasing the opening area, unable to continuously control the air pressure of the elevator car, difficult to achieve, etc., and achieves the effect of high sensitivity

Active Publication Date: 2016-08-17
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the air pressure difference inside and outside the elevator car is only 10hPa when it is the largest, it is necessary to increase the opening area to allow the air in the elevator car to flow naturally into and out of the elevator car through this small air pressure difference.
In addition, when the method of opening and closing the solenoid valve is used, the air pressure in the elevator car cannot be continuously controlled.
[0015] Therefore, in the air pressure control device disclosed in Patent Document 2, it is also difficult to realize highly sensitive air pressure control, and it is also difficult to realize figure 1 The air pressure variation pattern shown

Method used

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  • Elevator air pressure control device
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  • Elevator air pressure control device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0033] First, refer to figure 1 The air pressure change pattern that changes in an oblique step shape realized by the present invention will be described. figure 1 shows the change in air pressure P in the elevator car as the elevator car is descending 1 (that is, the target air pressure change pattern P 1 ) and the air pressure change P outside the elevator car 2 changes over time. It should be noted that in this specification, sometimes the above air pressure change is simply referred to as the air pressure in the car P 1 and outside air pressure P 2 .

[0034] Air pressure outside the car P 2 It changes according to the height of the running elevator car. When the height of the elevator car is set to x[m] and the air pressure on the ground is set to P 0 [hPa], set the temperature to T 0 [°C], the air pressure P outside the car can be calculated using the following formula according to the chronology of science 2 [hPa].

[0035] P 2...

no. 2 approach

[0061] Figure 6 The structure of the air pressure control device of the second embodiment is shown. and figure 2 The same structures are denoted by the same reference numerals, and their repeated descriptions are omitted.

[0062] The air pressure control device of this embodiment is provided with a plurality of pipes (bypass pipes) bypassing the suction port 1-1 and the exhaust port 1-2 of the blower, and a plurality of pipes with different calibers are provided on each pipe. An electric valve (solenoid valve) 20 replacing the flow control valve 7 .

[0063] At the air pressure (virtual air pressure) P indicated by the dotted line formed by controlling the rotation of the blower 1 3 and target air pressure P 1 When the pattern of the difference between them is limited, a plurality of solenoid valves 20 having different calibers can be used instead of the flow rate control valve 7 shown in the first embodiment. By opening the solenoid valve 20, the suction port 1-1 and ...

no. 3 approach

[0066] Figure 7 The structure of the air pressure control device of the third embodiment is shown. and figure 2 The same structures are denoted by the same reference numerals, and their repeated descriptions are omitted.

[0067] In this embodiment, the air blower 21 for exhaust (for pressure reduction) and the air blower 22 for air supply (for pressurization) are used instead of one air blower 1 . In addition, a flow control valve 23 is provided on a pipe branched from the suction port 21-1 connecting the air blower 21 and the pipe (exhaust pipe) of the elevator car 2, and a flow control valve 23 is provided on the pipe connecting the air outlet 22-1 of the air blower 22. A flow control valve 24 is provided on a pipe branched from the pipe (air supply pipe) of the elevator car 2 . The position of the branch pipe is preferably provided in the vicinity of the suction port 21-1 and the discharge port 22-1, and the positions of the flow control valves 23, 24 are preferably p...

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Abstract

The present invention provides an elevator air pressure control device capable of controlling the air pressure inside an elevator car (difference in air pressure inside and outside the elevator car) with high sensitivity. The elevator air pressure control device of the present invention has: a blower; an air supply pipe, an electric on-off valve is arranged in the middle of the air supply pipe, and the air supply pipe is used to supply air from the blower to the elevator car; An electric on-off valve is arranged in the middle of the pipe, and the exhaust pipe is used to exhaust air from the inside of the elevator car to the blower side; tube connection. When supplying air (air supply) to the elevator car, a part of the air that flows into the elevator car from the blower through the air supply pipe is extracted through the branch pipe and the flow control valve, and when exhausting (suction) from the elevator car, through The branch pipe and the flow control valve inject air into the air flowing from the inside of the elevator car to the blower side through the exhaust pipe.

Description

technical field [0001] The invention relates to an elevator air pressure control device for controlling the air pressure in an elevator car. Background technique [0002] When taking an elevator in a high-rise building, because the air pressure in the elevator car changes with the lifting of the elevator car, sometimes the ears of the passengers produce a feeling of earplugs. Various air pressure control devices for controlling the air pressure inside the elevator car have been proposed in order to alleviate the feeling of ear plugging in the ears. For example, in the air pressure control devices disclosed in Patent Document 1 and Patent Document 2, in order to simplify the structure of the air pressure control device, a blower is used to open and close a plurality of electromagnetic valves or switch the switching valve to control the air pressure according to the elevator. The lift of the car is controlled from pressurization to decompression and from decompression to pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B11/02
Inventor 石文良河村阳右三好宽萩原高行
Owner HITACHI LTD