JP2000018633A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an obstacle detector unnecessary for cost reduction and prevent wind flow from being disturbed by integrally providing a means for measuring lifting and lowering amount in conjunction with pulling and retracting of a string of a grill and a means for detecting abnormality in lifting and lowering motion. SOLUTION: An air conditioner is provided with a suction grill hung with strings at four corners so that the gill is lifted and lowered by pulling or retracting the strings 4. An lifting unit 2 is provided with a means for measuring lifting and lowering amount of the grill and a means for detecting abnormality in lifting and lowering motion integrally. The means for measuring lifting and lowering amount of the grill comprises a roller 17 rotatably supported on a case body 5 and capable of being rotated in conjunction with pulling and retracting of the strings 4, and the means 18 for detecting abnormality comprises a means for generating a pulse at the time of rotation of the roller 17. The means 18 for generating the pulse comprises a magnet rotated in conjunction with the roller 17 and a lead switch 20. By such a constitution, installation of a separate obstacle detector becomes unnecessary and cost reduction can he planned and wind flow is not disturbed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted air conditioner provided with a device for raising and lowering a suction grill, and more particularly to an air conditioner having a means for detecting the amount of elevation of the suction grill.

[0002]

2. Description of the Related Art As shown in FIGS. 6 and 7, a conventional ceiling-mounted air conditioner comprises an apparatus main body 30 and an indoor exposure panel 31 provided below the apparatus main body 30. Reference numeral 31 denotes an outer frame 32 and a suction grille 33 fitted inside the outer frame 32 so as to be openable and closable. When cleaning the suction grill 33, it is necessary to remove the object under the grill 33 and use a stepladder or the like to work up to a position where the suction grill 33 can be reached. Had the disadvantage of being expensive.

For the purpose of solving the drawback, a string for hanging at the corner of the grill is provided, a reel which is rotated by a motor is provided on the apparatus main body, the string is passed through the reel, and the motor is rotated to wind up the string (or There are devices for raising and lowering the grill. In this apparatus, when the motor is driven for a predetermined time or when the reel has rotated a predetermined number of revolutions, the motor is stopped to control the amount of elevation of the grill.

[0004]

However, in the method of detecting the winding amount or the feeding amount of the string based on the rotation speed of the motor or the rotation speed of the reel, when the grill hits an obstacle, it cannot be detected. . For this reason, it has been common practice to detect whether the grill has hit an obstacle by providing a mechanism for separately detecting the tension of the string. For this reason, the cost increases due to an increase in the number of parts and the number of assembling steps, and the flow of the wind may be hindered by additionally providing a detection device for detecting whether or not the grill has hit an obstacle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems.
It is an object of the present invention to provide an air conditioner that can reduce costs in raising and lowering a suction grill and that does not hinder the flow of wind.

[0006]

The present invention employs the following configuration to achieve the object.

That is, an air conditioner of the present invention is a ceiling-mounted air conditioner provided with a device for hanging a corner of a suction grill with a string and moving the grill up and down by moving the string in and out. It is characterized in that a means for measuring the amount of elevation of the grill in conjunction with the entry and exit of the string and a means for detecting an abnormal operation of the elevation of the grill are provided integrally.

[0008] With this configuration, the integral mechanical unit can measure the amount of elevation of the grill and detect an abnormality in the operation of elevating the grill in conjunction with the entry and exit of the string.

The means for measuring the amount of elevation of the grill and the means for detecting abnormalities in the operation of elevation of the grill include a roller that rotates in conjunction with the ingress and egress of a string, and a pulse signal generated when the roller rotates. It is characterized in that means for causing the pressure to be provided are provided.

With this configuration, it is possible to measure the amount of elevating by counting the pulses, and to detect an abnormality in the elevating operation of the grill due to disorder of the pulse cycle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment (hereinafter, referred to as "embodiment") of an air conditioner according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a partially cutaway front view showing one embodiment of the present invention, FIG. 2 is a front view showing a state where a cover is attached to FIG. 1, and FIG. 4 is a front view of a main part of the present invention, and FIG. 5 is a perspective view showing a mounted state.

This air conditioner is a ceiling-mounted type air conditioner provided with a device for suspending four corners of a suction grill 3 with strings 4 and moving the strings 4 up and down to move the grill 3 up and down. Means for measuring the amount of elevation of the grill 3 in conjunction with the entry and exit of the string 4 and means for detecting an abnormality in the elevation operation of the grill 3 are integrally provided.

The device for raising and lowering the grill 3 is mounted rotatably mainly between the case body 5 and the cover 6,
Reel 7 for winding (or feeding) the string 4
And a motor 8 for rotating the reel 7, a motor gear 9 provided on the motor 8, and a reel gear 10 provided integrally with the reel 7 and meshing with the motor gear 9. Make up.

The reel 7 has two reel grooves 11, 1
2, and one unit 2 can use two strings 4 to suspend two corners of the four corners of the grill 3. Therefore, as shown in FIG. 3, the four corners of the grill 3 are hung by two units 2 attached in parallel on the left and right. Two wires hanging from two corners of the grill 3 in one unit 2 pass through one of the guide grooves 13 and 14 provided in the case main body 5 and are wound around one of the two reel grooves 11 and 12 of the reel 7. Attached.
The string 4 wound around the reel 7 passes through the cord cover 15 and is connected to the grill 3 via a pull spring 16.

The means for measuring the amount of elevation of the grill 3 and the means for detecting an abnormal operation of the elevation of the grill 3 are rotatably supported by the case body 5 and are rollers 17 which rotate in conjunction with the movement of the string 4. And means 18 for generating a pulse when the roller 17 rotates. As a means 18 for generating a pulse signal, a magnet 19 attached to the roller 17 and rotating in conjunction with the roller 17
And a reed switch 20. This roller 1
Numeral 7 is a knurl to increase the frictional force with the string 4 as shown in FIGS. Thus, the roller 17
Although knurling is used as a means for increasing the frictional force with the string 4, a material having a high frictional force such as rubber may be used.

Since the means for measuring the amount of elevation of the grill 3 and the means for detecting an abnormal operation of the elevation of the grill 3 are integrated into the unit 2, the obstacle detection is separately provided as in the prior art. There is no need to provide a device. Therefore,
The cost can be reduced by reducing the number of parts and the number of assembling steps, and there is no need to separately provide an obstacle detecting device, so that the flow of the wind is less hindered.

The string 4 may be a belt, a chain, a wire cable, made of resin, metal, leather or the like.
Other appropriate wires can be used.

Next, how to use the air conditioner shown in this embodiment will be described. Although not shown, the air conditioner is provided with a receiving unit of a remote controller for controlling the motor 8, and when moving up and down the grill 3 using the air conditioner of the present invention, a signal is sent by the remote controller. By rotating the motor 8 forward or backward, the motor gear 9 provided on the motor 8 rotates, and accordingly, the reel gear 10 meshing with the motor gear 9 rotates, and the reel 7 formed integrally with the reel gear 10 rotates. Reel gear 10
The string 4 wound on the string enters and exits, so that the grill 3 suspended on the string 4 can be moved up and down. Therefore, when cleaning the suction grill 3, it is not necessary to remove an object under the grill 3 and use a stepladder or the like to go up to a position where the suction grill 3 can be reached, and to perform the work.
There is no danger. When the string 4 enters and exits, the roller 17 that detects the entry and exit of the string 4 rotates due to the friction between the string 4 and the roller 17, and generates a pulse signal with a constant period. By counting the pulses, the amount of elevation of the grill 3 can be measured, and an abnormality in the operation of elevation of the grill 4 can be detected based on the disturbance of the pulse cycle.

The present invention is not limited to the above embodiment. For example, in the above embodiment, a combination of a reed switch 20 and a magnet 19 is used as a means for generating a pulse. The pulse may be generated using a switch, a Hall element, a limit switch, an optical sensor, a capacitance detection element, or the like.

In the above embodiment, one unit 2 uses two strings 4 to suspend two of the four corners, and the two units 2 suspend the four corners.
By providing four reel grooves on the reel 7 and increasing the number of guide grooves in the case body 5 accordingly, it is possible to suspend four corners with one unit 2.

[0022]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect, it is possible to measure the amount of elevation of the grill and detect an abnormality in the operation of elevating the grill in conjunction with the ingress and egress of the string with an integrated mechanism.
The cost can be reduced by reducing the number of parts and the number of man-hours required to assemble.In addition, there is no need to separately install a separate device for detecting abnormalities in the vertical movement. An air conditioner that is less hindered can be provided.

According to a second aspect of the present invention, there is provided an air conditioner capable of measuring a vertical movement of a grill by counting pulses and detecting an abnormality of a vertical movement of the grill due to a disturbance in a pulse cycle. it can.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing an embodiment of the present invention.

FIG. 2 is a front view showing a state where a cover is attached to FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a front view showing a main part of the present invention.

FIG. 5 is a perspective view showing an attached state of one embodiment of the present invention.

FIG. 6 is a side view showing a conventional ceiling-mounted air conditioner.

FIG. 7 is a bottom view of FIG. 6;

[Explanation of symbols]

 2 Unit 3 Grill 4 String 7 Reel 8 Motor 17 Roller 18 Magnet 20 Reed switch

Claims (2)

[Claims] 1. A ceiling-mounted air conditioner equipped with a device for lifting and lowering the grill by hanging a corner of a suction grill with a string and moving the string in and out, wherein the grill is interlocked with the in and out of the string. An air conditioner characterized by integrally providing means for measuring the amount of elevating and lowering and means for detecting abnormalities in the elevating operation of the grill. The means for measuring the amount of elevation of the grill and the means for detecting abnormality in the operation of elevation of the grill comprise a roller which rotates in conjunction with the ingress and egress of the string, and a pulse signal generated when the roller rotates. 2. The air conditioner according to claim 1, further comprising means for causing the air conditioner to operate.