JPH10185236A - Apparatus for opening/closing ceiling opening in air conditioning system and air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the opening/closing of a ceiling opening easily and safely without using a foot-stool, and inspect and change an air filter unit of an air conditioner simply in a room without entering a ceiling plenum. SOLUTION: A pair of guide rail plates 6, 7 are provided in a ceiling plenum of an opening 3 formed in a ceiling-plane 1 of a room having an air conditioner 2 in its ceiling plenum. Each guide rail plate has a first guide groove 8 and a second guide groove 9, respectively, each being provided in series in a forward and backward direction, and the forward end of each guide groove has each of vertical guide grooves 8b, 9b directing downward, both being connectively provided to each of semicircle-shaped rounded portions 8a, 9a. A first and a second pins 11, 12 provided on left and right sides of an opening/closing body are engaged with the first guide groove 8 and the second guide groove 9, respectively.

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 an opening provided for inspection of an air conditioning system in which an air conditioner is installed above a ceiling, and an air conditioning system having the opening / closing 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 inspection and maintenance of the air conditioner is provided on the ceiling, and the ceiling 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] A conventional ceiling lid is hingedly attached and opened and stopped by a lock device. Therefore, when the ceiling lid is opened, it falls down by its own weight and hangs down. The opening and closing of the ceiling lid is performed by a worker climbing on a stepladder, which is extremely dangerous because the worker pivots down rapidly when the door is opened. In addition, the stepladder must be carried and troublesome and troublesome.

[0004]

The object of the present invention is to easily and safely open and close a ceiling opening without using a stepladder, and to inspect and replace an air filter unit of an air conditioner without entering the ceiling. Easy to do in the room.

[0005]

According to the present invention, in order to achieve the above object, a ceiling opening and closing device according to the present invention comprises a pair of left and right guide rails above and below the ceiling of an opening formed in the ceiling of a room having an air conditioner behind the ceiling. A first guide groove and a second guide groove are provided in each guide rail plate in series in the front-rear direction, and a front end portion of each guide groove is followed by a rounded portion such as a semicircular shape and a downward vertical guide. Grooves are provided continuously, and a first pin and a second pin provided on the left and right sides of the opening and closing body are respectively engaged with the first and second guide grooves.

In the air conditioning system according to the present invention, a pair of left and right guide rail plates are provided behind the ceiling of an opening formed in the ceiling of a room, and a first guide groove and a second guide groove are provided in each guide rail plate. The guide grooves are provided in series in the front-rear direction, and a downward vertical guide groove is continuously provided at the front end of each guide groove following a round portion such as a semicircular shape. The first guide groove and the second guide groove are opened and closed. An opening and closing device for a ceiling opening in which a first pin and a second pin provided on the left and right sides of the body are engaged with each other, and an air filter unit in the casing is capable of ascending and descending below the casing behind the ceiling, Alternatively, an air conditioner that can be housed in a casing is provided with a structure in which an air filter unit is provided so as to be able to move up and down the opening in the ceiling.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the accompanying drawings. In the figure, reference numeral 1 denotes a ceiling of a room, 1a denotes an air inlet, 1b denotes an air outlet, 2 denotes an air conditioner, and 3 denotes an opening provided in a dashed line. Is mainly used as an inspection port.

Reference numeral 4 denotes a frame provided behind the ceiling. A movable opening / closing device 5 is provided in the frame. The opening / closing device will be described below. A first guide rail plate 6 and a second guide rail plate 7 are provided in series on the left side plate 4a of the frame body 4 in the front-rear direction. At the front end of each of the guide grooves 8 and 9, downwardly oriented vertical guide grooves 8b and 9b are provided continuously to the semicircular round portions 8a and 9a.

A first guide rail plate 6 and a second guide rail 7 plate are also provided on the right side plate 4b of the frame body 4 in the front-rear direction similarly to the left side plate. The guide grooves 8 and 9 are formed in series at the front end of each of the guide grooves 8 and 9.
Subsequently, downward vertical guide grooves 8b and 9b are continuously provided.

Reference numeral 10 denotes an opening / closing body, and a slide plate 1 is provided on left and right sides.
0a, 10a are provided, and each slide plate is provided with pins 11, 12 for engaging the first guide groove 8 at the front end thereof and the second guide groove 9 at the rear end thereof, respectively. is there. Although the guide rail plates 6 and 7 are shown as two on each of the left and right sides in the figure, they may be one on each of the right and left sides, and are provided on the left and right side plates of the frame body. It may be provided indirectly.

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 side guide pins 11 and 12 of the opening / closing body 10 are aligned with the vertical guide grooves 8 in the guide grooves.
b, 9b in the state engaged with the lower end portion,
Fits into the opening 3 in the ceiling to close the opening.

However, when the opening / closing body is pushed from below with a working rod or the like, the guide pins 11 and 12 are guided by the vertical guide grooves and round grooves of the guide rail plate, and once move upward to come off the ceiling opening. By moving slightly backward and further pushing backward, it is moved to the upper rear part of the ceiling opening 3 and the ceiling opening is opened. To close the ceiling opening, when the opening and closing body is pulled forward, it is pulled forward by the guide groove, the guide pins 11 and 12 fall into the vertical guide groove, the opening and closing body fits into the ceiling opening, and the ceiling opening is It is automatically closed.

When the air conditioner 2 is inspected, particularly when the filter is inspected or replaced, the opening / closing body is moved in the above-described manner to open the ceiling opening, and the filter unit 2b is pulled down into the room by the elevating mechanism. Inspect and replace inside.

After the inspection and replacement, the filter unit is raised by the lifting mechanism and stored in the air conditioner, and then the ceiling opening is closed with the ceiling lid.

[0017]

According to the present invention, the ceiling lid can be moved laterally by pushing or pulling the ceiling lid from inside the room with a work stick or the like, thereby opening and closing the ceiling opening. Therefore, there is no danger that the ceiling lid will be pivoted and lowered suddenly when opened, unlike the conventional one, and there is no need to use a stepladder, so that the opening and closing operation of the ceiling lid can be performed simply and safely.

In addition, the ceiling cover is opened as described above, and 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 performed under the ceiling. There is an advantage that it can be performed easily and efficiently and safely in the room without getting into the room.

[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 plan view of the switching device.

[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 ... Opening / closing device 6 ... First guide rail plate 7 ... Second Guide rail plate 8: Guide groove 9: Guide groove 10: Opening / closing body 10a: Slide plate 11: Guide pin 12: Guide pin

Claims (2)

[Claims] 1. A pair of left and right guide rail plates are provided on the ceiling behind an opening formed in the ceiling of a room having an air conditioner behind the ceiling, and a first guide groove and a second guide groove are provided on each guide rail plate. Are provided in series in the front-rear direction, and a downward vertical guide groove is continuously provided at the front end of each guide groove, following a round portion such as a semicircular shape, and the first guide groove and the second guide groove are An opening / closing device for a ceiling opening of an air conditioning system, wherein first and second pins provided on left and right sides of an opening / closing body are engaged with each other. 2. A pair of left and right guide rail plates are provided behind the ceiling of an opening formed in a ceiling of a room, and a first guide groove and a second guide groove are provided in each guide rail plate in series in the front-rear direction.
At the front end of each guide groove, a downward vertical guide groove is continuously provided following a round portion such as a semicircular shape, and provided on the left and right sides of the opening / closing body in the first and second guide grooves. An opening / closing device for a ceiling opening in which the first pin and the second pin are engaged with each other, and an air filter unit in the casing can be raised and lowered and pulled out below the casing behind the ceiling,
Alternatively, an air conditioning system provided with an air conditioner that can be stored in a casing so that an air filter unit can move up and down the opening in the ceiling.