KR101116210B1 - Ceiling-mounted cassette type air conditioner - Google Patents

Abstract

The present invention discloses a ceiling type air conditioner that allows the four sides of the suction grill to move up and down uniformly. The disclosed ceiling type air conditioner includes a main body mounted to the ceiling and receiving a heat exchanger and a blower, a suction grill detachably mounted on the lower part of the main body, and a lifting device for lifting and lowering the suction grill. A plurality of ropes connected to mutually spaced positions of the plurality of ropes, a plurality of reels installed on the main body to wind or unwind each rope, a driving motor for rotating the plurality of reels, and transmitting rotation of the driving motor to the plurality of reels. It includes a differential that allows a difference in the rotational speed of each reel according to the difference in the rotational resistance of each reel.

Description

Ceiling air conditioner {CEILING-MOUNTED CASSETTE TYPE AIR CONDITIONER}

1 is a cross-sectional view showing the configuration of a ceiling air conditioner according to the present invention.

Figure 2 is a perspective view showing the external appearance of the ceiling air conditioner according to the present invention.

3 is a bottom view of the ceiling type air conditioner according to the present invention.

Figure 4 is a perspective view showing the configuration of the lifting device of the ceiling air conditioner according to the present invention.

Figure 5 is a cross-sectional view showing the internal configuration of the driving device of the lifting device of the ceiling type air conditioner according to the present invention.

Figure 6 is an exploded perspective view showing the internal configuration of the driving device of the lifting device of the ceiling type air conditioner according to the present invention.

Explanation of symbols on the main parts of the drawings

10: main body, 12: blower,

13: heat exchanger, 20: ceiling panel,

21: suction port, 22: discharge port,

23: air purification filter, 24: suction grill,

30: elevating device, 31a, 31b: first and second rope,

32a, 32b: first and second rollers, 33a: first sensing device,                 

33b: second sensing device, 40: driving device,

41: first reel, 42: second reel,

43: drive motor, 44: casing,

50: differential, 51: first driven shaft,

52: second driven shaft, 53: ring gear,

54: differential pinion, 55: first driven pinion,

56: second driven pinion, 57: driving pinion.

The present invention relates to a ceiling type air conditioner, and more particularly, to a ceiling type air conditioner having a lifting device for lifting and lowering a suction grill.

In general, the ceiling type air conditioner installed on the ceiling of a building has a main body installed to enter the interior space of the ceiling with an indoor heat exchanger and a blower installed therein, and a ceiling panel installed to cover the lower surface of the main body and the opening of the ceiling. Equipped. In addition, the air conditioner includes an inlet formed at the center of the ceiling panel for suction and discharge of indoor air, and a plurality of discharge ports formed at the outer side of the inlet of the ceiling panel, and cleans the air sucked through the inlet. An air purifying filter is provided inside the inlet of the panel.

In addition, the ceiling type air conditioner has a suction grill which is detachably mounted at the center of the ceiling panel so that the user can separate the air purification filter, and the suction grill is lifted up and down so that the user can easily change or clean the air purification filter. It is provided with a lifting device to make it possible. The air purification filter is usually mounted on the inner surface (upper surface) of the suction grill so that it can be lowered together when the suction grill is lowered.

The lifting device includes ropes respectively connected to four corners of the suction grill, and a driving device for lifting and unwinding the suction grill by simultaneously winding or unwinding the ropes, and the driving device includes a plurality of reels for winding or releasing each rope. (Reel) and a drive motor for rotating these reels in the forward and reverse directions.

However, such a conventional ceiling air conditioner is uneven winding of each reel winding the rope when the suction grill is raised by the operation of the lifting device or when the length of each rope is changed due to long-term use, the closing of the suction grill is closed. There was a problem that was not made correctly.

The conventional example to solve this problem is the ceiling type air conditioner disclosed in the Republic of Korea Patent Publication No. 1998-018467 (published: June 5, 1998). The ceiling type air conditioner of this publication includes a coil spring provided at a portion where each reel is coupled to control the rotation of each reel, and includes control means for controlling the operation of the driving motor so that all sides of the suction grill are uniformly closed. have. This allows the suction grill to be closed to a certain degree by the action of the coil springs installed on each reel and the control operation of the control means. However, such a ceiling-type air conditioner also has a problem that the coil spring is not functioning properly or the rope is excessively extended in all directions, the four sides of the suction grill may not be uniformly closed.

The present invention is to solve such a problem, an object of the present invention is to provide a ceiling-type air conditioner so that the four sides of the suction grill can be uniformly closed regardless of the length change of each rope.

Ceiling type air conditioner according to the present invention for achieving the above object, the heat exchanger and the blower to accommodate the main body mounted on the ceiling, the suction grill detachably mounted to the lower portion of the main body, and the lifting grill And an elevating device, wherein the elevating device includes a plurality of ropes connected to mutually spaced positions of the suction grill, a plurality of reels installed on the main body to wind or unwind the ropes, and a drive to rotate the plurality of reels. It characterized in that it comprises a differential device for transmitting a rotation of the motor and the drive motor to the plurality of reels and the difference in the rotational speed of each reel according to the difference in the rotational resistance of each reel.

In addition, the differential device includes a first driven shaft for rotating one of the reels, a second driven shaft which is disposed coaxially with the first driven shaft while rotating the other one of the reels, and a rotation center line A ring gear installed between the two driven shafts so as to coincide with the rotation center line of the driven shaft, and rotatably installed between the center of rotation of the ring gear and the outer circumferential portion exposed to both sides of the ring gear. At least one differential pinion disposed radially from the center of rotation of the ring gear, and first and second portions respectively installed at the first and second driven shafts so as to be engaged with the differential pinion at both sides of the ring gear, respectively. And a second pinion and a drive pinion engaged with the ring gear to rotate the ring gear and coupled to the rotation shaft of the drive motor. .

In addition, the elevating device rotatably supports the first and second driven shafts, and is installed at a lower portion of the main body while accommodating the reels, ring gears, differential pinions, first and second driven pinions, and drive pinions. Characterized in that it comprises a casing.

In another aspect, the present invention is characterized in that the differential pinion and the first and second driven pinions are bevel gears.

In addition, the elevating device is characterized in that it further comprises a plurality of rollers which are installed to support each rope in the lower portion of the main body of the position corresponding to each of the rope connection to the suction grill.

The elevating device may further include a plurality of sensing devices installed on the suction grill to detect the closing of the suction grill at a lower portion of the main body at positions close to the positions at which each rope is connected to the suction grill.

In addition, the present invention is characterized in that the elevating device is installed on each of the lower both sides of the main body.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the ceiling type air conditioner according to the present invention enters into the ceiling 1 through an opening 2 of the ceiling 1, and has a box-shaped main body having an open bottom surface thereof. 10) and a ceiling panel 20 mounted on the lower end of the main body 10 to cover the lower surface opening 11 of the main body 10 and the opening 2 of the ceiling 1.

Inside the main body 10, a blower 12 for blowing indoor air is installed at the center, and a heat exchanger 13 for cooling or heating air is installed at the outer side of the blower 12. The inlet 21 is formed at the center of the ceiling panel 20, and the outlet 22 is formed at the outer sides of the inlet 21.

The blower 12 has a centrifugal turbo fan 12a that sucks air from the lower suction port 21 side and discharges it outward in a radial direction, and an inner upper surface of the main body 10 to drive the turbo fan 12a. It includes a drive motor 12b is fixed. The heat exchanger 13 is installed around the outer periphery of the turbo fan 12a so that the air blown by the operation of the turbo fan 12a can be exchanged while passing. In addition, the heat exchanger 13 is supported by the support member 14 installed in the inner lower portion of the main body 10 to collect and discharge the condensed water flowing down from the heat exchanger 13. In addition, the support member 14 is provided with an air guide plate 15 for partitioning the inlet side of the turbo fan (12a) and the outlet side of the turbo fan (12a) to smooth air flow. This configuration is such that when the blower 12 inside the main body 10 operates, the air sucked into the main body 10 through the inlet 21 is heat-exchanged while passing through the heat exchanger 13, and then the discharge port 22. By supplying back to the indoor space through the cooling or heating of the indoor space can be performed.

In addition, the ceiling type air conditioner according to the present invention, the user to separate the air purification filter 23 and the air purification filter 23 is installed on the inlet 21 to filter foreign matter in the air sucked through the inlet (21). It is provided with a suction plate 24 of the flat form detachably mounted to the suction port 21 of the ceiling panel 20. At this time, the suction grill 24 is formed with a plurality of vent holes (24a) to enable the suction of air. And the air purification filter 23, as shown in Figure 4, is installed on the inner surface of the suction grill 24 so that the user can be separated together when separating the suction grill 24.

In addition, the present invention is provided with a lifting device 30 for elevating the suction grill 24 so that the user can easily separate and replace or clean the air purification filter 23 from the air conditioner installed on the ceiling (1).

As shown in FIGS. 2 to 4, the elevating device 30 is installed at both sides of the inlet 21 of the lower part of the main body 10 so as to simultaneously raise or lower the suction grill 24 at both sides. It consists of two sets of lifting devices provided in the same way. And each lifting device 30 on both sides is, as shown in Figure 4, the first and second ropes (31a, 31b) connected to the rope connecting portions (25a, 25b) of the upper surface of the two corners of the suction grill 24, respectively ), And a driving device 40 installed below the main body 10 to raise and lower the suction grille 24 by winding or unwinding the two ropes 31a and 31b. In addition, each lifting device 30 is the first and second rollers are installed in the lower portion of the main body 10 respectively corresponding to the positions where the first and second ropes 31a and 31b are connected to the suction grill 24 ( 32a and 32b and first and second sensing devices 33a and 33b respectively installed at positions close to the positions at which the two rollers 32a and 32b are installed to detect the closing of the suction grill 24.                     

This configuration allows the first and second ropes 31a and 31b to be attached to the first and second rollers 32a and 32b when the driving device 40 of each lifting device 30 installed on both sides of the suction port 21 operates. The suction grill 24 can be lifted and lowered by being guided or wound while being guided by the first and second suction devices 33a and 33b of the suction grill 24 when the suction grill 24 is fully raised and closed. It is to be able to detect the closing. Here, the first and second sensing devices 33a and 33b for detecting the closing may be configured with a conventional micro switch or a hall sensor.

As shown in FIGS. 5 and 6, the driving device 40 for winding or releasing the ropes 31a and 31b includes the first and the second windings for the first and second ropes 31a and 31b, respectively. Two reels (41, 42), the drive motor 43 for rotating the two reels (41, 42) in the forward and reverse directions, while transmitting the rotation of the drive motor 43 to the two reels (41, 42) Differential device 50, two reels 41 and 42, and a differential device 50 to produce a difference in rotational speed of each reel 41 and 42 according to the difference in rotational resistance (rotational load) of each reel 41 and 42. It includes a casing 44 for receiving.

In addition, the differential device 50 inside the casing 44 is coupled to the first and second reels 41 and 42 to rotate the first and second reels 41 and 42, respectively, and is arranged coaxially with each other. A plurality of differentials rotatably installed in the ring gear 53 and the ring gear 53 provided in the center portion between the first driven shaft 51 and the second driven shaft 52 and the two driven shafts 51 and 52; Rotating the first and second driven pinions 55 and 56 and the ring gear 53 coupled to the first and second driven shafts 51 and 52 to engage with the pinion 54 and the differential pinion 54, respectively. And a drive pinion 57 engaged with the ring gear 53 and coupled to the rotation shaft 43a of the drive motor 43.

More specifically, one end of the first driven shaft 51 and the second driven shaft 52 is supported by the shaft support portions 44a and 44b formed on both sides of the casing 44 so as to be rotatable, respectively. The reels 41 and the second reels 42 are fixed to the outer surfaces of the first and second driven shafts 51, 52 so as to rotate together with the first and second driven shafts 51, 52, respectively. The ring gear 53 is provided between the two driven shafts 51 and 52 so that its center of rotation coincides with the center of rotation of the two driven shafts 51. The ring gear 53 is supported in a rotatable state by entering two rotatable shafts 51, 52 on both sides into a freely rotatable state in the axial engagement hole 53a formed at the center thereof.

The plurality of differential pinions 54 are made of a conventional bevel gear and are rotatably installed between the center of rotation of the ring gear 53 and the outer circumferential portion so as to be exposed to both side surfaces of the ring gear 53. As such, a plurality of gear mounting portions 53b are formed on the ring gear 53 so that both sides thereof can be installed so that the differential pinions 54 can be installed. The plurality of differential pinion rotation shafts 54a are arranged so that their axial directions are radially from the center of rotation of the ring gear 53 and are rotatably supported by the respective gear mounting portions 53b of the ring gear 53. .

The first and second driven pinions 55 and 56 are made of bevel gears meshing with the differential pinions 54 at both sides of the ring gear 53 and together with the first and second driven shafts 51 and 52. It is fixed to the outer surface of the first driven shaft 51 and the second driven shaft 52 so as to rotate. The drive pinion 57 is engaged with the outer circumference of the ring gear 53 in a state of being coupled to the rotation shaft 43a of the drive motor 43. At this time, the drive motor 43 is installed outside the casing 44, the rotary shaft 43a of the drive motor 43 enters the casing 44 and is coupled with the drive pinion 57. In addition, the first rope 31a and the second rope 31b may enter the casing 44 at both sides of the casing 44 so that the first rope 31a and the second rope 31b may be wound around the first reel 41 and the second reel 42, respectively. And second rope entry holes 45a and 45b.                     

The operation of the driving device 40 is as follows.

When the ring gear 53 is rotated by the operation of the drive motor 43 while the load is applied to the first rope 31a and the second rope 31b in the same manner, the first and second driven pinions 55 Since the same force (rotating load) is applied to both sides of the differential pinion 54 engaged with the reference numeral 56, the differential pinion 54 does not rotate but only revolves with the ring gear 53. Therefore, at this time, since the two driven pinions 55 and 56 on both sides rotate at the same speed in the same direction as the rotation direction of the ring gear 53, the first and second reels 41 and 42 rotate in the same manner. 31a) and the second rope (31b) can be wound or released, thereby lifting the suction grille (24). Here, the lifting or lowering operation of the suction grille 24 depends on the rotational direction of the driving motor 43.

On the other hand, during the closing of the suction grille 24 by the operation of the drive device 40, either of the corners of both sides of the suction grille 24 connected to the first and second ropes (31a, 31b) is first closed. In this case, the load on the two ropes 31a and 31b is different. That is, since the rope connected to the first closing side can no longer be pulled, the load on that side increases rapidly. As such, when the loads on the two ropes 31a and 31b are different, the operation of the driving device 40 is performed as follows.

For example, when the load on the first rope 31a increases and the first reel 41 no longer rotates (the side connected with the first rope of the suction grille closes first), the first driven pinion 55 This doesn't rotate anymore. Therefore, the differential pinion 54 rotates in the direction in which the ring gear 53 rotates and at the same time the first driven pinion 55 does not rotate, thereby rotating and rotating the differential pinion 54. As a result, the opposite second driven pinion 56 rotates faster in the rotational direction of the ring gear 53. In the state where the first driven pinion 55 is completely stopped, the second driven pinion 56 rotates twice as fast. Therefore, at this time, since the second reel 42 continues to rotate to wind the second rope 31b, the corner of the suction grill 24 connected to the second rope 31b is also completely closed.

In this way, the driving device 40 of the present invention, even if one side of the suction grille 24 is first closed by the operation of the differential device 50 and the rotation of the corresponding reel stops, the other reel continues to rotate and the suction grille ( Close the rest of 24) completely. Therefore, the present invention can uniformly close the four sides of the suction grill 24 even if the length change of each rope 31a, 31b occurs or the winding of the rope wound on each reel 41, 42 is uneven. The controller (not shown) of the device detects the closing of the suction grille 24 on all sides through the first sensing device 33a and the second sensing device 33b, and detects that all sides of the suction grille 24 are closed. When the drive motor 43 is stopped.

 As described in detail above, the ceiling-type air conditioner according to the present invention, since the lifting device for elevating the suction grill is provided with a differential device, even if the length of each rope is changed or the winding of each rope is uneven, all sides of the suction grill are uniform. It has a closing effect.

Claims (7)

In the ceiling-type air conditioner containing a heat exchanger and a blower, the main body mounted on the ceiling, a suction grill detachably mounted on the lower portion of the main body, and a lifting device for lifting the suction grill, The elevating device includes a plurality of ropes connected to mutually spaced positions of the suction grill, a plurality of reels installed on the main body to wind or unwind the ropes, a drive motor to rotate the plurality of reels, and the drive. A differential device for transmitting a rotation of a motor to the plurality of reels and causing a difference in rotational speed of each reel according to the difference in rotational resistance of each reel, The elevating device further includes a ceiling-type air conditioner installed on the suction grill to detect a closing of the suction grill at a lower portion of the main body at positions close to the positions at which each rope is connected to the suction grill. group. The method of claim 1, The differential device includes a first driven shaft for rotating one of the reels, a second driven shaft disposed coaxially with the first driven shaft while rotating the other one of the reels, and a center of rotation of the two reels. A ring gear disposed between the two driven shafts so as to coincide with a center of rotation of the coaxial shaft; At least one differential pinion disposed radially from the center of rotation of the ring gear, and first and second mounted on the first and second driven shafts respectively to be engaged with the differential pinion at both sides of the ring gear, respectively. And a driven pinion and a drive pinion engaged with the ring gear to rotate the ring gear and coupled to the rotational shaft of the drive motor. Long air conditioner. 3. The method of claim 2, The elevating device rotatably supports the first and second driven shafts and is installed at a lower portion of the main body while accommodating the reels, ring gears, differential pinions, first and second driven pinions, and drive pinions. Ceiling air conditioner comprising a casing. 3. The method of claim 2, And the differential pinion and the first and second driven pinions are bevel gears. The method of claim 1, The elevating device further comprises a plurality of rollers installed on the suction grill to support the respective ropes in the lower portion of the main body at positions corresponding to the respective ropes are connected to each other. delete The method of claim 1, Ceiling lifting air conditioner, characterized in that the elevating device is installed on each of the lower both sides of the main body.

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