KR20030053864A - Device for lifting a frame filter of an indoor unit for an air conditioner - Google Patents

Abstract

PURPOSE: An apparatus for lifting a frame filter of an indoor unit of an air conditioner is provided to prevent deterioration of cooling performance and contamination of indoor air. CONSTITUTION: An apparatus includes guide rails(70,70',70") formed on an inside wall of an indoor unit to guide vertical movement of frame filters(7,7'); a motor(44), a step motor rotating in normal direction and reverse direction, having a gear(40) placed on an end of a rotary shaft(42), and mounted on lower parts of the guide rails; a main lifter(20) having a spline(22) formed on one side thereof and engaged with the gear to move up and down along the guide rails when the motor works; and an auxiliary lifter(10) moved together with the main lifter by an interlocking unit, a belt(30) wound around a belt mounting part(24) formed on one side of the main lifter to slide, so as to move up and down the frame filter fixed on a lower end thereof. A fixing protrusion(26) is formed on the other side of the main lifter to prevent downward movement of the frame filter.

Description

Frame filter lifting device for indoor unit of air conditioner {DEVICE FOR LIFTING A FRAME FILTER OF AN INDOOR UNIT FOR AN AIR CONDITIONER}

The present invention relates to a frame filter elevating device of an indoor unit of an air conditioner, and more particularly, an auxiliary lifter driven by a gear rotated by driving of a motor and simultaneously linked by a belt mounted on the main lifter. The present invention relates to a frame filter lifting apparatus of an indoor unit of an air conditioner configured to automatically lift and lift a frame filter of an indoor unit.

In general, since the interior space of a building is contaminated by internal factors such as occupants' breath, it is necessary to periodically supply fresh air from the outside. In addition, in hot summer or cold winter, the room should be cooled and heated to an appropriate temperature, and the proper humidity is maintained to be suitable for people's activities. To this end, most buildings are equipped with air conditioners.

A typical air conditioner is an air conditioner that cools a room by using a phenomenon of absorbing heat when surrounding liquid evaporates. The air conditioner consists of a compressor for compressing the refrigerant into a gas of high temperature and high pressure, a condenser for liquefying the compressed high temperature and high pressure refrigerant, and an evaporator for evaporating the refrigerant expanded by the expansion valve. The air is forcedly blown by the fan into the room for cooling.

In particular, in general households, room air conditioners which are separated from indoor units and outdoor units are frequently used in terms of space utilization. 1 is a cross-sectional view showing the internal structure of an indoor unit constituting a conventional room air conditioner.

As shown, the air conditioner indoor unit includes a front cover 3 and a rear cover 4, a grill 1 is installed on the front of the front cover 3, and a cross fan is provided on the rear cover 4. 5) and the heat exchanger 6 are mounted. In addition, the front surface of the front cover (3) to filter the dust in the air sucked to reduce the damage to the product or to clean the air in the room frame filter (7) and the air cleaning filter ( 8) is mounted.

Here, the frame filter (7) is detachably mounted by a support piece (9) protruding at a predetermined interval in the lower portion of the front cover (3) while covering the front of the front cover (3), the air cleaning filter (8) is detachably mounted to the channel-shaped mounting portion (10) formed on the upper rear of the front cover (3).

Conventional air conditioner indoor unit having such a configuration is usually fixed to the wall of the living room or room for efficient space utilization, at this time installed in a considerably high place in consideration of the convection of indoor air. Accordingly, when replacing or cleaning the frame filter 7 with a new one, it is necessary to remove the frame filter 7 with a chair or a stand in order to open the front cover 3 of the indoor unit installed at a height higher than its own height. .

In addition, users who are not familiar with the structure of the air conditioner indoor unit may not be able to open the front cover (3) itself, and as a result, dust or various foreign substances contained in the air may be caught in the filter because the filter is not cleaned even after long-term use. There is a problem that the cooling efficiency is deteriorated and the performance of antibacterial, dust collection, etc., which are inherent to the filter, is deteriorated, thereby increasing the pollution of indoor air.

The present invention for solving this problem is to automatically lower by the motor without removing the frame filter from the indoor unit to enable the cleaning and replacement of the filter to maintain the state of the filter to exhibit the maximum antibacterial, dust collection performance It is an object of the present invention to provide a frame filter elevating device of an indoor unit of an air conditioner, which can prevent a decrease in cooling performance and contamination of indoor air.

1 is a cross-sectional view showing a structure of a conventional air conditioner indoor unit.

Figure 2 is a cross-sectional view showing the structure of the air conditioner indoor unit is equipped with a frame filter lifting apparatus of the present invention.

3 is a cross-sectional view showing an operating state of the frame filter lift apparatus shown in FIG.

Figure 4 is an exploded perspective view showing the structure of the frame filter lifting apparatus of the present invention.

5 is a cross-sectional view showing a state in which the gears shown in FIG. 4 are engaged with the main lifter and the belt;

Explanation of symbols on the main parts of the drawings

1: grill 3: front cover

4: rear cover 5: cross pan

6: heat exchanger 7: frame filter

8: air cleaning filter 10: auxiliary lifter

20: main lifter 22: spline

24: belt mounting portion 26: locking projection

30: belt 40: gear

42: rotating shaft 44: motor

50: stopper 60, 62: fastener

70: guide rail

Frame filter lifting apparatus of the air conditioner indoor unit of the present invention for achieving the above object is provided with a cross fan and a heat exchanger therein, in the air conditioner indoor unit provided with a frame filter and an air cleaning filter for removing dust and foreign matter in the air And a guide rail formed on the inner wall of the indoor unit to guide the lifting movement of the frame filter, a motor having a gear at an end of the rotating shaft and mounted on the lower portion of the guide rail, and a spline engaged with the gear on one surface thereof. And a main lifter that moves up and down along the guide rail when the motor is operated, and an auxiliary lifter which moves the frame filter fixed to the lower part by moving with the main lifter by an interlocking means. It is done.

Here, it is preferable that the linkage means is a belt wound around the belt mounting portion of the main stopper so as to be slidable.

Hereinafter, with reference to the accompanying Figures 2 to 4 will be described in detail with respect to the frame filter lifting apparatus of the indoor air conditioner according to a preferred embodiment of the present invention, the same reference numerals are assigned to the same parts as the conventional structure described in FIG. .

Figure 2 is a cross-sectional view showing the structure of the air conditioner indoor unit equipped with a frame filter lifting device of the present invention, Figure 3 is a cross-sectional view showing the operating state of the frame filter lifting device shown in Figure 2, Figure 4 shows the structure of the frame filter lifting device of the present invention 5 is a cross-sectional view showing a state in which the gear shown in FIG. 4 is engaged with the first lifter and the belt.

First, as shown in FIG. 2, the air conditioner indoor unit attached to the upper part of the wall has a front cover 3 and a rear cover 4, and a grill 1 is installed on the front of the front cover 3. The rear cover 4 is equipped with a cross fan 5 and a heat exchanger 6. In addition, the front surface of the front cover (3) by filtering the dust in the air sucked in to reduce the damage to the product or to clean the air in the room frame filter (7) and air cleaning filter ( 8) is mounted.

In the air conditioner indoor unit having such a configuration, a series of elevating devices driven by a motor inside the preferred indoor unit of the present invention is illustrated as a method for facilitating replacement or cleaning of the frame filter 7 and always maintaining a clean state.

The overall structure of the frame elevating apparatus employed in the present invention is a guide rail 70 for guiding the frame filter 7 to slide up and down, a motor 44 as a power source, and a rotation shaft 42 of the motor 44. To the auxiliary lifter 10 descending together with the main lifter 20 via a main lifter 20 having a spline 22 meshed with a gear 40 mounted on the main body 20 and a belt 30 as an interlocking means. consist of.

Here, the guide rail 70 is composed of a guide rail 70 'installed at the center of the indoor unit and guide rails 70, 70 "provided at both ends, as shown clearly in FIG. Both ends of the filters 7 and 7 'are supported and guided, and in addition, only the lifting device for driving the right frame filter 7 is shown for the sake of simplicity, but the left frame filter 7' of the same structure is driven. A lifting device may be further provided.

In addition, when the frame filter 7 is formed as a whole, or when the left and right frame filters 7 and 7 'are integrally connected to move together, a lifting device is installed on one side and the vertical movement of the frame filter 7 on the other side. It is sufficient to install only a guide roller for guiding and supporting the guide. In the following description, the frame filter is numbered 7 and the guide rail is numbered 70. FIG.

The motor 44, which is a power source, is operated by electricity supplied from the outside to rotate the gear 40 fixed to the end of the rotation shaft 42, and preferably employs a step motor capable of forward and reverse rotation. Do.

One surface of the main lifter 20 is formed with a spline 22 meshed with the gear 40. In addition, the main lifter 20 is provided with a belt mounting portion 24 for mounting the belt 30 as a connecting means. The top and bottom of the belt mounting portion 24 is rounded in the same shape as the top and bottom of the belt 30 so that the belt 30 can rotate smoothly. On the other side of the main lifter 20 opposite to the side where the belt mounting portion 24 is installed, a locking projection 26 for restraining the downward movement of the frame filter 7 is formed.

A plurality of teeth 34 are formed on the surface of the belt 30, as shown in a partially enlarged manner, so that the teeth are engaged with the teeth of the gear 40 at the time of assembly, and when the gear 40 is rotated. In the belt 30 is rotated on the belt mounting portion 24 to lower the auxiliary lifter (10). A fastening hole 32 for coupling with the auxiliary lifter 10 is formed at the upper end of the belt 30.

The upper and lower ends of the auxiliary lifter 10 for lowering and raising the frame filter 7 while being lowered and raised by the belt 30 are fastened to the fastening hole 32 of the belt 30 and an appropriate fastening means (for example, a connecting string or a bolt nut). The upper fastening hole 12 is formed to be coupled by a fastener such as, and the lower fastening hole 14 for coupling with the frame filter 7 is formed at the lower end. Fastening holes 7a for coupling with the lower fastening holes 14 of the auxiliary lifter 10 are also formed at the lower end of the frame filter 7.

Therefore, the belt 30 is wound up so as to slide on the belt mounting portion 24 of the main lifter 20 during assembly, and the upper fastening hole 12 and the lower fastening hole 14 of the auxiliary lifter 10 are wound. By the upper and lower ends of the auxiliary lifter 10, the belt 30 and the frame filter 7 are coupled to each other. In addition, the motor 44 is capable of transmitting power to the teeth 34 of the belt 30 provided in the spline 22 of the main lifter 20 and the belt mounting portion 24 of the gear 40 fixed to the rotation shaft 42. 5 is assembled in the engaged state as shown in FIG.

FIG. 5 shows a state where the splines 22 and the belt 30 of the main lifter 20 move by the gear 40. As shown here, the gear 40 has a sufficient length to be engaged with the spline 22 formed on one surface of the main lifter 20 and the teeth 34 formed on the belt 30. Therefore, the main filter 20 and the auxiliary lifter 10, which are operatively coupled through the spline 22 and the belt 30 at the same time by the rotation of the gear 40, move together and move the frame filter 7 up and down. It will be moved to, which will be described with reference to Figs.

First, referring to FIG. 2, the upper portion of the guide rail 70 is roundly formed along a curved path in which the frame filter 7 is installed, and the lower portion is formed in a straight state in a substantially vertical direction. The lower end of the guide rail 70 is equipped with a motor 44 as a source of power generation, and the stopper 50 which stops the downward movement while the locking protrusion 26 of the main lifter 20 is caught in the upper portion close to the motor 44. Attached.

The main lifter 20 is provided below the guide rail 70, and the belt 30 is wound around the belt mounting portion 24 of the main lifter 20. In addition, the upper end of the belt 30 is coupled to the upper end of the auxiliary lifter 10 by a fastener 62 such as a connecting string or a bolt and a nut, and the lower end of the auxiliary lifter 10 is a fastener 60. It is coupled to the lower end of the frame filter (7) by.

In this state, when an external power source is applied to the motor 44 for cleaning and replacing the frame filter 7, the gear 40 and the spline 22 start to rotate through the rotating shaft 42. The main lifter 20 which is coupled starts to descend. At the same time, part of the gear 40 is also engaged with the teeth 34 of the belt 30, so that the belt 30 starts to rotate on the belt mounting portion 24 and the auxiliary lifter 10 also starts to descend. do.

At this time, the descending speed of the main lifter 20 and the auxiliary lifter 10 is doubled. That is, when the size, shape, pitch, and the like of the splines 22 and the teeth 34 are the same, the auxiliary lifter 10 is faster than the main lifter 20 at twice the speed (speed ratio of 1: 2). Will descend.

At the moment when the engaging projection 26 of the main lifter 20 comes into contact with the stopper 50 due to the continuous rotation of the motor 44, under the control of a control unit (not shown), an input signal of a contact sensor such as a limit switch is applied. On the basis of this, or by the time control, the electricity supplied to the motor 44 is cut off and the rotation of the gear 40 is stopped.

At this time, the main lifter 20 and the auxiliary lifter 10 is lowered as shown in FIG. 3, and at this time, the frame filter 7 is exposed to the opening and the lower space of the indoor unit to facilitate replacement and cleaning. It can be done.

When the motor 44 is rotated in reverse after the frame filter 7 is replaced and cleaned, the main filter 20 and the auxiliary lifter 10 move upward while the frame filter 7 moves upward in accordance with the above-described operating principle. At this time, the auxiliary lifter 10 rises until it is positioned as shown in FIG. 2 at a speed twice as fast as the main lifter 20.

In this state, according to the control of a control unit (not shown), the electricity supplied to the motor 44 is cut off based on the input signal of the contact sensor such as a limit switch or by time control, so that the rotation of the gear 40 It stops and returns to its original state.

According to the present invention described above, if the motor is operated when the frame filter is replaced or cleaned, the main lifter attached to the rotating shaft of the motor is lowered and the belt attached to the main lifter rotates while the auxiliary lifter is rotated. In addition, by lowering the frame filter while lowering, it is easy to clean and replace the filter, and the filter is always kept clean so that excellent dust collection performance and clean performance can be exhibited at all times. Therefore, the cleanliness of the indoor air is improved and the cooling efficiency of the air conditioner is maximized. There is an advantage to this.

Claims (6)

In the air conditioner indoor unit equipped with a cross fan and a heat exchanger and a frame filter and an air cleaning filter for removing dust or foreign matter from the air, A guide rail formed on an inner wall of the indoor unit to guide the lifting movement of the frame filter; A motor having a gear at an end of the rotating shaft and mounted to a lower portion of the guide rail; A main lifter formed with a spline meshing with the gear and moving up and down along the guide rail when the motor is operated; And an auxiliary lifter for vertically moving the frame filter fixed to a lower end by moving together with the main lifter by an interlocking means. 2. The frame filter elevating device of the indoor unit of claim 1, wherein the interlocking means is a belt wound around the belt mounting portion of the main stopper. The air conditioner indoor unit according to claim 2, wherein an upper fastening hole for coupling with the upper end of the belt is formed at an upper end of the auxiliary lifter, and a lower fastening hole for coupling with the frame filter is formed at a lower end of the auxiliary lifter. Frame filter lifting device. 4. The frame filter elevating device of the indoor unit of claim 2, wherein a plurality of teeth formed on the surface of the belt are engaged with the gear. The frame of claim 1, wherein a stopper is formed on one side of the main lifter, and a stopper is engaged on the guide rail to stop the downward movement of the frame filter. Filter lift. The frame filter according to any one of claims 1 to 3, wherein the gear has a length sufficient to be engaged with a spline formed on one surface of the main lifter and a tooth formed on the belt. Lifting device.