JP2001141259A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring a suction grille into contact with an entire ceiling panel in a status where the suction grille has been drawn down by an operator in mounting or dismounting a filter, or one end of the suction grille has been caught by an obstacle during its vertical movement. SOLUTION: An air conditioner is provided with a transmitting portion 18 for a position detecting sensor, a receiving portion 19 for the position detecting sensor and a reflecting plate 20 for the position detecting sensor to seize the position of a suction grille 11. Thus, the grille 11 can be in contact with an entire ceiling panel 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner mounted on a ceiling by being embedded in the ceiling or suspended from the ceiling.

[0002]

2. Description of the Related Art A conventional air conditioner which is mounted on a ceiling by being embedded in a ceiling or suspended from the ceiling and provided with a suction grill elevating device is disclosed in JP-A-6-1571.
No. 8, JP-A-6-159718.

[0003] Hereinafter, the conventional air conditioner will be described with reference to the drawings. FIG. 5 is a longitudinal sectional view of a conventional ceiling-mounted air conditioner. FIG. 6 is a partially enlarged view of an air conditioner provided with a lifting device in the ceiling-mounted air conditioner of FIG.

A heat exchanger 3, a drain pan 4, a blower 5, a fan motor 6, an orifice 7 and the like are arranged inside a unit body 2 buried in the ceiling 1. The unit body 2 has a lower opening. The covering decorative panel 8 is detachably mounted. A suction port 9 is formed at the center of the decorative panel 8, and blowout ports 10 are formed on both sides of the suction port 9.

[0005] A suction grill 11 is fitted into the suction port 9,
The filter 12 is detachably locked behind the filter. Bracket 1 attached to inner wall of decorative panel 8
A motor 14 capable of normal and reverse rotation is fixed to 3, and a plurality of wires 16 are wound around a sproll 15 driven by the motor 14. The ends of these wires 16 are connected to the suction grill 11 via wire guides 17 attached to the brackets 13, respectively.

The operation of the air conditioner configured as described above will be described below.

First, the motor 14 is rotated in the reverse direction, and when the wire 16 is rewound from the sproll 15 and the suction grill 11 is lowered for a predetermined period of time in a horizontal state, the motor 14 is stopped. In this state, the operator removes the filter 12 from the suction grill 11 and cleans it. After cleaning of the filter 12, the filter 12 is attached to the suction grill 11 again, and the motor
5 winds the wire 16. Then, the suction grill 11 rises for a predetermined time to stop the motor 14, so that the suction grill 11 is stored in the decorative panel 8.

[0008]

However, when the suction grill 11 is raised and stored in the decorative panel 8 after the filter 12 has been washed, the motor 14 is rotated forward and the wire 16 is wound up by the sproller 15. At this time, there is a problem that the entire surface of the suction grill 11 cannot be brought into contact with the lower surface of the decorative panel 8 due to variations in the rotation speed of the motor 14, elongation of the wire 16, winding of the wire 16 by the sproll 15, and the like. .

In addition, when the operator pulls down the suction grill 11 when attaching or detaching the filter 12, or when one end of the suction grill 11 is caught by an obstacle while the suction grill 11 is moving up and down. Since the operation of the motor 14 is controlled only by the time, there is a problem that the operation of the motor 14 is stopped before the suction grill 11 reaches the lower surface of the decorative panel 8.

An object of the present invention is to solve the conventional problem, and an object of the present invention is to provide an air conditioner capable of performing an ascending and descending operation in consideration of a state of a suction grill.

[0011]

According to a first aspect of the present invention, at least one set of a unit main body, a decorative panel, a suction grill, and a bracket is provided for detecting a state of a suction grill. A detection sensor transmission unit and a position detection sensor reception unit are provided, and a control device is provided for controlling the operation of stopping the motor, normal rotation, and reverse rotation in the input state.

Thus, the lifting operation can be performed in consideration of the state of the suction grill.

According to a second aspect of the present invention, a motor is stopped immediately before the suction grill rises to reach the decorative panel by winding up a plurality of wires, and then only one side of the suction grill is wound. A control device is provided for operating one side of the suction grill and one side opposite thereto so as to raise one side of the suction grill opposite to the decorative panel after being raised.

Thus, the entire surface of the decorative panel, the suction grill or the filter can contact the main body or the lower surface of the decorative panel.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to a suction grill having a built-in filter in which a unit body containing a heat exchanger, a blower and the like is embedded in a ceiling or suspended from the ceiling. And a spool for winding a plurality of wires connected thereto and a motor capable of reversing forward and backward, wherein the unit body is provided to detect a state of the suction grill in the air conditioner which raises and lowers the suction grill by the motor. A control device for providing at least one set of a position detecting sensor transmitting unit and a position detecting sensor receiving unit in one of the decorative panel, the suction grille, and the bracket, and controlling the operation of stopping, forward, and reverse rotation of the motor in an input state. By having the above, when the suction grill reaches a predetermined position, or when the suction grill contacts the lower surface of the decorative panel, the operation of the motor is controlled. It has an action that can control.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the motor is operated immediately before the suction grill is raised by winding up a plurality of the wires to reach the decorative panel. And then, after reaching only one side of the suction grill and reaching the decorative panel, separate one side of the suction grill and one side opposite thereto so as to raise one side of the suction grill on the opposite side. By providing the control device for performing the above-described operation, the entire surface of the suction grill has an effect of contacting the lower surface of the decorative panel.

An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is an enlarged view of a suction grille portion of an air conditioner according to Embodiment 1 of the present invention, wherein a position detecting sensor transmitting section 18 and a position detecting sensor receiving section 19 are provided on a bracket 13. A position detection sensor reflector 20 is provided on the suction grill 11. The other configuration is the same as the conventional one shown in FIGS. FIG. 2 is a functional block diagram of the air conditioner according to Embodiment 1 of the present invention. FIG. 3 is a flowchart showing the operation of the embodiment.

In FIG. 1, the position detecting sensor transmitting section 18
Emits a light beam excellent in anti-dust property and anti-reflective property, for example, a light-emitting diode and an infrared ray are used. In particular, since the infrared ray is a light ray excellent in dust resistance and anti-reflection properties, the suction grill 11 and the position detecting sensor
The light beam reflected to 0 can be easily received by the position detection sensor receiving section 19, and is preferable for detecting the position of the suction grill 11.

In FIG. 2, a position detecting device 21 is a detecting means for detecting whether or not the suction grill 11 has reached a position immediately before reaching the decorative panel 8 by ascending. It comprises a plate 20 and a position detection sensor receiving section 19. The controller 22 controls the operation of the motor 14 based on the signal of the position detecting device 21.

The operation of the air conditioner constructed as described above will now be described with reference to the flowchart of FIG.

First, in step 1, a time is set until the light beam transmitted from the position detection sensor transmitting section 18 is reflected by the position detection sensor reflecting plate 20 and received by the position detection sensor receiving section 19. Step 2 is to rotate the motor 14 in the normal and reverse directions so that the wire 16 is rewound and wound on each sproll 15, respectively.
Up and down. Step 3 is the position detection sensor transmission unit 1
If the time from when the light beam transmitted from 8 is reflected by the position detection sensor reflector 20 to be received by the position detection sensor receiver 19 is equal to or longer than the time set in step 1, the motor 14 is stopped.

(Embodiment 2) In the present embodiment, when the wire 16 is further wound on the air conditioner according to Embodiment 1, just before the suction grill 11 rises and reaches the decorative panel 8, the motor 14 Is stopped, and then only one side of the suction grill 11 is raised to reach the decorative panel 8, and then one side of the suction grill 11 and one side opposite thereto are raised so that one side of the suction grill 11 on the opposite side is raised. Is provided with a control device for performing independent operations.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

First, at step 1, it is determined whether or not the suction grill 11 is located near the decorative panel 8 based on the input state of the position detection sensor receiving section 19, and if it is located near the decorative panel 8, the suction grill 11 Stop the ascent operation.

In step 2, an operation is performed to raise only one side of the suction grill 11, and the suction grill 11
Is determined based on the input state of the position detection sensor receiving unit 19, and when it reaches the decorative panel 8, the ascending operation is stopped.

In step 3, one side of the raised suction grill 11 is raised, and it is determined whether one side of the suction grill 11 has reached the decorative panel 8 based on the input state of the position detection sensor receiving unit 19, and the decorative panel 8 is determined. , The ascent operation is stopped.

In step 4, all the sides of the suction grill 11 are raised, and the determination is made based on the input state of the position detection sensor receiving section 19. When the decorative panel 8 is reached, the raising operation is stopped.

[0029]

As described above, according to the present invention, one or more position detecting sensor devices are installed on any of the unit body, the decorative panel, the suction grill, and the bracket, and the state of the suction grill is detected. By interlocking the operation of the motor capable of rotating forward and backward from the input state, it is possible to detect that the suction grill has reached a predetermined position, stop the operation of the motor, and stop the suction grill at the predetermined position. .

Further, when the suction grill is raised and stored in the decorative panel, variations in the rotation speed of the motor,
Even if the wire length becomes uneven due to the wire elongation, the winding state of the wire on the spool, etc., the entire surface of the suction grill can abut the lower surface of the decorative panel.

Further, when the suction grille is housed in a decorative panel, or when the suction grille is caught by an obstacle while the suction grille is being lifted, the position of the panel on the panel during the raising operation of the suction grille for a certain period of time. If no change has occurred, by adding control to stop the motor, it is possible to avoid continuation of operation even when the load on the motor exceeds a predetermined value.

As described above, according to the second invention, the suction grill is raised by winding up a plurality of wires,
Immediately before reaching the decorative panel, stop the operation of the motor,
Thereby, the swinging of the suction grill is attenuated, so that the storage accuracy of the suction grill can be improved.

Further, after stopping the operation of the motor immediately before the suction grill reaches the decorative panel, only one side of the suction grill is raised. When the motor reaches the decorative panel, one side of the suction grill on the opposite side is raised. By using a control method in which one side of the suction grille and one side opposite to the suction grille are made independent, the entire surface of the suction grille can contact the lower surface of the decorative panel.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a first embodiment of an air conditioner according to the present invention.

FIG. 2 is a block diagram of the air conditioner of the embodiment.

FIG. 3 is a flowchart of the air conditioner of the embodiment.

FIG. 4 is a flowchart of Embodiment 2 of the air conditioner according to the present invention.

FIG. 5 is a longitudinal sectional view showing a conventional air conditioner.

FIG. 6 is a partially enlarged view of FIG. 4 showing a conventional air conditioner.

[Explanation of symbols]

 2 Unit main body 3 Heat exchanger 5 Blower 8 Decorative panel 11 Suction grille 12 Filter 14 Motor 15 Sprawl 16 Wire 18 Position detecting sensor transmitting section 19 Position detecting sensor receiving section

Claims (2)

[Claims] A unit body having a built-in heat exchanger, a blower and the like embedded in a ceiling or suspended from the ceiling, a suction grill having a built-in filter and a spool for winding a plurality of wires connected thereto; In an air conditioner including a motor capable of rotating forward and backward, and raising and lowering the suction grill by the motor, in order to detect a state of the suction grill, the unit main body, a decorative panel, the suction grill,
One or more sets of a position detecting sensor transmitting unit and a position detecting sensor receiving unit are provided on any of the brackets, and a control device is provided for controlling the operation of stopping, forward rotation, and reverse rotation of the motor in an input state. Air conditioner. 2. The operation of the motor is stopped immediately before the suction grill rises by winding up the plurality of wires to reach the decorative panel, and then only one side of the suction grill is raised to reach the decorative panel. 2. The air conditioner according to claim 1, further comprising a control device for performing an independent operation on one side of the suction grill and one side opposite thereto so as to raise one side of the suction grill on the opposite side. Machine.