JP3033375B2 - Ceiling-mounted air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-ceiling type air conditioner having an intermittent winding type roll filter at a suction port.

[0002]

2. Description of the Related Art Conventionally, as this type of air conditioner, for example, the one shown in FIG.
No. 57217). In this air conditioner, a fan 12 is provided behind a ceiling of a vehicle such as a train so as to communicate with an outlet 15 at the center of the ceiling, and a heat exchanger is provided in a passage between the suction ports 14 and 14 on both sides of the ceiling and the fan 12. 13 and 13, and a pair of intermittent winding type roll filters 16 are provided so as to cover each suction port 14. The roll filter 16 is provided at one end in a case 17 having a large through opening at the center with a delivery shaft 19 having a new filter roll 18 mounted thereon.
Is connected to the other end of a filter 18 driven by a motor.
A winding shaft 20 for winding the leading end of a is provided, and guide shafts 21 and 22 are provided near both shafts. A light-receiving element and a light-emitting element (not shown) are provided so as to face the front and back of the stretched filter 18a.
Rotates the filter 18a for one span (both guide shafts 21,
(Length between 22).

[0003]

However, the conventional air conditioner has a structure in which the fan 12 is immediately stopped by pressing the operation stop switch.
When the operation stop switch is pressed during the winding operation of the winding shaft 20 of No. 6, the dust adhering to the surface of the filter 18a is separated by the stop of the suction operation of the fan and the vibration accompanying the winding of the filter. However, there is a drawback in that it falls into the room and soils the room. However, if the fan does not stop within a short time after the operation stop switch is pressed, the user, particularly a housewife at home, may be anxious. Accordingly, an object of the present invention is to prevent dust from falling into a room without giving a user anxiety by preventing a fan from being stopped during a winding operation of a filter even when an operation stop command is issued. It is an object of the present invention to provide a ceiling-mounted air conditioner capable of performing the above-mentioned steps.

[0004]

In order to achieve the above object, a ceiling-mounted air conditioner according to the present invention comprises a casing 1 containing a fan 2 and a heat exchanger 3 as illustrated in FIG.
The air inlet 4 and the air outlet 5 are provided behind the ceiling so as to face the ceiling opening A, and are stretched so as to cover the air inlet 4, and are wound by a predetermined length by a driving unit 20 at predetermined time intervals. In the apparatus provided with the roll filter 16 to be taken, when the driving means 20 is in operation, it is determined whether or not the operation stop switch of the air conditioner has been pressed. Control means 6 is provided for continuing the operation of the fan 2 until the winding operation is completed. The control means 6
Thus, the operation of the fan 2 may be continued at a predetermined minimum rotation speed.

[0005]

When the operation stop switch is pressed while the filter 18a, which is stretched so as to cover the suction port 4 of the casing 1 of the ceiling-embedded air conditioner, is being wound by the driving means 20, it is assumed that the operation stop switch is pressed. I do. Then, the control unit 6 determines that the operation stop switch has been pressed during the operation of the driving unit 20 and operates the fan 2 in the casing 1 until the winding operation of the predetermined length by the driving unit 20 ends. To continue. Therefore, the filter 18
Even if a vibrates, the suction action of the fan 2 continues,
Dust adhered to the surface of the filter 18a does not peel off and fall into the room. Further, the control means 6 controls the fan 2
When the operation is continued at a predetermined minimum rotation speed, dust can be prevented from falling into the room as described above, and the fan 2
It is possible to inform the user that the vehicle is about to stop due to a decrease in the driving sound of the vehicle, thereby eliminating the user's anxiety.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a longitudinal sectional view showing an example of a ceiling-embedded air conditioner. This air conditioner has a heat exchanger having a fan 2 on one side of a casing 1 partitioned by a partition plate 8 and a drain pan 9 on the other side. Each of the heat sinks 3 is accommodated in a lower part of the casing 1 and a suction port 4 on the fan side and a blower outlet 5 on the heat exchanger side are provided on the ceiling back with the ceiling opening A facing. A cassette type (17) roll filter 16 is attached to the suction port 4, and the suction port 4 is covered with a filter 18a stretched between guide shafts 21 and 22 at both ends. The roll filter 16 is the same as that described with reference to FIG. 3 except that a controller 6 as a control unit is provided, and the same members are denoted by the same reference numerals and description thereof will be omitted.

As described above with reference to FIG. 3, the controller 6 is adapted to transmit a light-receiving signal from a front-side light-receiving element 7b, which receives transmitted light from a light-emitting element 7a provided on the back side of a filter 18a near the sending shaft 19, to dust. When the clogging is reduced to a predetermined value or less, the winding shaft 20 is driven in the direction of the arrow by a motor (not shown) as a driving means, and the filter 18a of the filter roll 18 mounted on the delivery shaft 19 is wound for one span. Also,
When the motor is operating (see S1 in FIG. 2), the controller 6 determines whether an operation stop switch (not shown) of the air conditioner has been pressed (see S2 in FIG. 2). When the answer is affirmative, the operation lamp is turned off (see S3), and the operation of the fan 2 is stopped at a predetermined minimum rotational speed until the winding operation for one span is completed (see S5).
After continuing with (LL tap), stop fan 2
(See S6). On the other hand, if it is determined that the operation stop switch has not been pressed, the operation of the fan 2 up to that point is continued (see S7), and the winding for one span is performed.
(See S8).

[0008] The operation of the ceiling-mounted air conditioner having the above configuration will be described below with reference to FIG. The controller 6 provided on the roll filter 16 in the casing 1 includes a light receiving element 7
When the light receiving signal from b becomes equal to or less than a predetermined value, the winding shaft 20 is driven by a motor so as to wind the filter 18a stretched over the suction port 4 by one span, and the roll filter 16 performs step S1. The winding operation starts. Controller 6
In step S2, it is determined whether or not the operation stop switch of the air conditioner has been pressed.
In step S4, the operation lamp is turned off to inform the user that the stop is approaching.
The operation is continued by dropping to L tap, and in step S5,
When the winding operation for one span by the winding shaft 20 is completed,
In step S6, the fan 2 is stopped. on the other hand,
If it is determined to be no in step S2, the process proceeds to step S7, where the operation of the fan 2 is continued, and the winding for one span is completed in step S8.

Therefore, even if the filter 18a vibrates in association with the winding operation of the winding shaft 20, the fan 2 moves and the suction action is continued, so that the dust adhering to the surface of the filter 18a is peeled off. It does not fall into the room and does not pollute the room. Further, in the above embodiment, since the fan 2 is dropped to the lowest LL tap to continue the operation and the operation lamp is turned off, it is possible to inform the user that the stop is near, and the user is not anxious. There is an advantage.
In the above embodiment, the clogging of the filter 18a is
Although the optical detection is performed using the light emitting element 7a and the light receiving element 7b, the pressure difference may be detected by detecting the pressure difference before and after the filter that is equal to or more than a predetermined value using a pressure sensor or the like.

[0010]

As is apparent from the above description, the ceiling-embedded air conditioner of the present invention has an air inlet and an outlet of a casing accommodating a fan and a heat exchanger facing the ceiling opening. Is provided, and is provided with a roll filter that is stretched so as to cover the suction port and is intermittently taken up by the driving unit. When the driving unit is in operation,
The control means determines whether or not the operation stop switch of the air conditioner is pressed, and when it is determined that the operation stop switch of the air conditioner is pressed, the operation of the fan is continued until the winding operation of the predetermined length of the roll filter is completed. Therefore, even if there is vibration of the filter due to winding, dust attached to the filter does not fall into the room due to the suction action of the fan, so that the inside of the room can be prevented from being stained. Further, if the control means is used to continue the operation of the fan at the predetermined minimum rotation speed, it is possible to inform the user that the stop is approaching, so that the user does not feel uneasy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of an embedded ceiling air conditioner of the present invention.

FIG. 2 is a flowchart showing a flow of a control operation of the controller of the embodiment.

FIG. 3 is a longitudinal sectional view showing a conventional ceiling-mounted air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Casing, 2 ... Fan, 3 ... Heat exchanger, 4 ... Suction port, 5 ... Outlet, 6 ... Controller, 7a ... Light emitting element, 7b ... Light receiving element, 16 ... Roll filter, 17 ... Case, 18 ...
Filter roll, 18a ... Filter, 19 ... Sending axis, 2
0: Winding shaft, 21, 22: Guide shaft.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 13/28 B01D 46/18 F24F 11/02

Claims (2)

(57) [Claims] 1. A suction opening (4) and an air outlet (5) of a casing (1) containing a fan (2) and a heat exchanger (3) are connected to a ceiling opening (A).
And the ceiling
(4) A ceiling-embedded air conditioner provided with a roll filter (16) that is stretched so as to cover and is wound up by a predetermined length at a predetermined time interval by a driving unit (20). While (20) is in operation, it is determined whether or not the operation stop switch of the air conditioner has been pressed. When it is determined that the operation stop switch has been pressed, the fan is not operated until the winding operation of the predetermined length is completed. Control means for continuing the operation of (2)
An embedded ceiling air conditioner comprising (6). 2. The ceiling-mounted air conditioner according to claim 1, wherein the control means (6) causes the operation of the fan (2) to continue at a predetermined minimum rotation speed.