JPH10185235A - Apparatus for opening/closing ceiling opening in air conditioning system and air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open and close a ceiling opening simply and safely. SOLUTION: One side edge of a ceiling lid 4 is mounted to one side edge of an opening 3 formed in a ceiling 1 of a room in such a manner that the ceiling lid 4 can be horizontally flapped by means of a. hinge 5 having a horizontal shaft. Further, a geared motor 6 is provided in a ceiling plenum on the side opposed to the one side edge of the opening 3, and a drum 7 is mounted to a drive shaft of the geared motor 6. A starting end of a cord 8 wound around the drum 7 is fixed to a free end on a rear face of the ceiling lid 4, and the geared motor 6 is driven forward and backward by operation of a control unit 10, whereby it is so designed that the ceiling lid 4 is flapped forward and backward by the cord 8 to open and close the ceiling opening 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for opening an air conditioner in which an air conditioner is installed above a ceiling, mainly for inspection, and an air conditioning system having the device.

[0002]

2. Description of the Related Art In an air conditioning system provided with an air conditioner behind a ceiling, an inspection opening for performing inspection and maintenance of the air conditioner is provided on the ceiling, and the inspection opening is closed with a ceiling lid. Air conditioners frequently require inspection, cleaning and replacement of filters, and the applicant company has developed a device that can easily pull out the filter unit from the casing of the air conditioner and easily store it in the casing. When checking the filter, etc., the ceiling inspection opening must be opened and closed.

[0003] The opening and closing of the ceiling lid is performed by a worker climbing on a stepladder, which is not only dangerous but also requires that the stepladder be carried, which is bothersome and troublesome. Furthermore, the conventional ceiling lid is simply provided by a hinge or the like so as to be freely opened and closed, and the ceiling lid is merely locked in a closed state. is there. In addition, the worker is on a stepladder and opens and closes the door, which is very dangerous.

[0004]

An object of the present invention is to eliminate the above-mentioned disadvantages of the prior art and to provide a device capable of easily and safely opening and closing a ceiling opening.

[0005]

The opening / closing device for a ceiling opening according to the present invention is provided so that one side edge of a ceiling lid is horizontally rotatable with a hinge having a horizontal axis at one side edge of an opening formed in a ceiling of a room, Also, a geared motor is provided on the back of the ceiling opposite to one side edge of the opening, a drum is mounted on the drive shaft, and the start end of the rope wound around the drum is fixed to the back surface of the free end of the ceiling lid. At least
The geared motor is driven forward / reverse by operation of the control unit, whereby the ceiling lid is rotated forward / reverse by the cable and the ceiling opening is opened / closed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the accompanying drawings. In the drawing, reference numeral 1 denotes a ceiling of a room, 1a denotes an air inlet, 1b denotes an air outlet, 2 denotes an air conditioner installed behind the ceiling, and 3 denotes an opening provided on the ceiling by a broken line. The opening serves as an inspection port for the air conditioner installed behind the ceiling. One side edge of the ceiling lid 4 is attached to one side edge of the opening 3 opened in the ceiling so as to be horizontally rotatable by a hinge 5 having a horizontal axis.

A geared motor 6 and a drum 7 driven by the motor are provided at the back of the ceiling opposite to one side edge of the opening in the ceiling, and a cable wound around the drum 7 is provided. The tip of the ridge 8 is fixed to a hook 9 on the back surface of the free end of the ceiling lid. The geared motor is driven forward and backward by a signal from the control unit 10 by opening and closing the switch 13, whereby the rope 8 is sent out from the drum 7 or is wound around the drum and the ceiling lid rotates forward and backward. The ceiling opening can be opened and closed by a ceiling lid.

When the ceiling lid closes the opening by pressing the close switch of the control unit, the limit switch 11 is closed.
Operates to stop the geared motor, and the lock device 12 composed of a solenoid or the like is automatically operated to engage with the engaged piece 14 of the ceiling lid to lock the ceiling lid in a closed state.

When the open switch of the control unit 10 is pressed, the lock device 12 is released, the geared motor rotates in the reverse direction, and the rope is extended, and the ceiling lid is rotated downward by its own weight to open the opening. In this case, the ceiling lid may be held open by the open-side limit switch. The signal from the control unit may be transmitted by wire, or may be transmitted wirelessly.

In order to prevent the cable from hindering the lifting and lowering of the air filter unit, two drums are provided as shown in FIG. In this case, the drums 7, 7 are firmly fitted to both ends of the drum shaft 15 to which the rotation of the geared motor is transmitted via the gear mechanisms G1, G2, and the ropes of each drum are fastened to the free ends of the ceiling lid. Reference numeral 16 indicates a drum shaft bearing.

In the air conditioner 2 provided on the ceiling, as shown in FIG. 1, the filter unit 2b in the casing 2a is pulled out below the casing by an elevating mechanism and can be stored in the casing. The filter unit is provided behind the ceiling so that the filter 2b can move up and down the opening 3 in the ceiling. Reference numeral 2c indicates a blower, and reference numeral 2d indicates a cooling and heating coil.

Various types of filter unit elevating mechanisms have been developed by the applicant company. For example, as shown in the figure, a cable W wound around a drum D fixedly fitted to a drive shaft of a motor M on a casing. Is fixed to the upper part of the filter unit through a hole in the upper plate of the casing, and the filter unit is lowered and raised by forward and reverse rotation of the motor.

In this embodiment, the ceiling opening can be opened and closed by operating the open / close switch for the control unit. In the air conditioner 2 provided above the ceiling, the filter unit 2b in the casing 2a is pulled out below the casing by an elevating mechanism and can be stored in the casing.

At the time of inspection of the air conditioner 2, particularly at the time of inspection or replacement of the filter, the lock device is released by pressing the open switch of the control unit, and the geared motor is driven to pull out the cable from the drum, and The ceiling opening is thus opened. When the ceiling opening is opened, the filter unit 2b of the air conditioner is pulled down into the room by the elevating mechanism, and inspection and replacement are performed in the room.

After the inspection and replacement, the filter unit is raised by the elevating mechanism and stored in the air conditioner. Then, by pressing the closing switch of the control unit, the geared motor is driven, and the drum winds the cable and the ceiling. The lid is turned upward by the cable, the ceiling opening is closed, and the ceiling lid is locked by the locking device.

[0016]

According to the present invention, the geared motor is driven forward and reverse by opening and closing a switch in a room, whereby the drum is rotated forward and reverse, and the cable is extended,
Alternatively, the ceiling lid rotates forward and backward by being involved, and the ceiling opening is opened and closed. Therefore, according to the present invention, it is possible to easily and safely open and close the ceiling lid without using a stepladder.

Also, open the ceiling lid as described above,
The air filter unit of the air conditioner can be pulled down into the room through the ceiling opening by the lifting mechanism, so that maintenance, inspection and replacement of the filter unit can be done easily and efficiently in the room without entering the ceiling. There are advantages that can be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mechanism for opening and closing a ceiling opening and an air conditioning system according to the present invention.

FIG. 2 is an enlarged vertical sectional view of the same.

FIG. 3 is a partial plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ceiling 1a ... Air inlet 1b ... Air outlet 2 ... Air conditioner 2a ... Casing 2b ... Filter unit 2c ... Blower 2d ... Cooling and heating device M ・ ・ ・ Motor D ・ ・ ・ Drum W ・ ・ ・ Rope 3 ・ ・ ・ Ceiling opening 4 ・ ・ ・ Ceiling lid 5 ・ ・ ・ Hinges 6 ・ ・ ・ Geared motor 7 ・ ・ ・ Drum 8 ・ ・ ・ Rope 9 ... hook 10 ... control unit 11 ... limit switch 12 ... locking device 13 ... switch 14 ... engaged piece 15 ... drum shaft 16 ... bearing G1 ...・ Gear G2 ・ ・ ・ Gear

Claims (2)

[Claims] 1. One side edge of an opening formed in a ceiling of a room having an air conditioner behind a ceiling, one side edge of a ceiling lid is attached by a hinge having a horizontal axis so as to be horizontally rotatable, A geared motor is provided behind the ceiling on the side opposite to one side edge of the opening, and a drum driven by the motor is provided, and the starting end of the cable wound around the drum is fixed to the free end back surface of the ceiling lid. At least, the geared motor is driven forward / reverse by a signal from the control unit by a switch operation, whereby the ceiling lid is rotated forward / reverse by a cable so that the ceiling opening can be opened / closed. Switchgear. 2. One side edge of a ceiling lid is attached to one side edge of an opening formed in a ceiling of a room so as to be horizontally rotatable by a hinge having a horizontal axis. A geared motor is installed behind the ceiling on the opposite side, and a drum driven by the motor is provided.The start end of the rope wound around this drum is fixed to the free back surface of the ceiling lid, and the geared motor is controlled by switch operation. A ceiling opening / closing device for an air conditioning system is provided, which is driven forward / reverse by a signal from the unit, whereby the ceiling lid is turned forward / backward by a cable and the ceiling opening is opened / closed. An air conditioner that can move up and down the air filter unit in the casing so that it can be pulled out of the casing or housed in the casing. Air conditioning system formed by providing so over it.