KR20090080749A - Ceiling type air conditioner - Google Patents

Abstract

A ceiling type air conditioner includes prevent the generation of abnormal noise when using two blower fans for discharging heat exchanged air and secure optimum path for the discharged air. A ceiling type air conditioner includes a case fixed to the ceiling, a base panel mounted to an opened bottom part of the case, a first blower fan(220a) disposed in the longitudinal direction in the base panel, a second blower fan(220b) disposed straight with respect to the first one and concentrically connected to the first one, and a fan mounting bracket(230) mounted between the first and second blower fans for supporting the concentric shaft(221) and defining spaces disposed by the first and second blower fans separately to avoid air discharged by the first and second blower fans from being mixed together.

Description

Ceiling type air conditioner

The present invention relates to a ceiling type air conditioner, and more particularly, to satisfy the compactness (miniaturization) in accordance with the market trend of the product, to prevent the occurrence of abnormal noise, and to determine the optimum flow path of air discharged by heat exchange. The present invention relates to a ceiling air conditioner that can be secured.

In general, the ceiling type air conditioner is largely configured to include an indoor unit installed on the ceiling and performing a cooling function, an outdoor unit performing a heat dissipation and compression function, and a refrigerant pipe connecting the indoor unit and the outdoor unit to each other.

The ceiling type air conditioner according to the prior art includes an air intake port and an air discharge port in order to harmonize the air on the indoor side by sucking and exchanging air on the indoor side and then discharging the air to the indoor side again.

However, in discharging the heat-exchanged air through the air discharge port, the intake air and the discharged air are mixed with each other to generate abnormal noise, or abnormal noise is generated due to the structural defect of the blower fan for discharging the heat-exchanged air there is a problem.

In particular, in the case of the general ceiling type air conditioner, the bar is disposed on the upper side of the ceiling, and should be designed in consideration of the influence of its own weight. .

In addition, the distance between the ceiling top and the ceiling finishing material is installed, the so-called "speed", the length of the longitudinal direction to increase the size of the product to correspond to the recent speed, but the upper and lower height to pursue the compactness That is the market trend. In response to this, when the upper and lower heights of the product are reduced, there is a problem in that an optimal design is required to minimize the flow path resistance of the air discharged through the air discharge port and to simultaneously solve the above-described abnormal noise generation problem.

It is an object of the present invention to provide a ceiling type air conditioner that prevents abnormal noise from occurring during operation of the air conditioner and ensures an optimal flow path of air that is discharged by heat exchange.

Ceiling type air conditioner according to the present invention is fixed to the ceiling, the bottom surface is opened, the air inlet and the air inlet is disposed on the bottom surface of the opening, the air is sucked into the inside of the case A base panel having an air discharge port discharged after the air is heat-exchanged, a first blowing fan disposed in the longitudinal direction inside the base, and disposed in a straight line with respect to the first blowing fan and coaxial with the first blowing fan And a discharge air discharged by the first blower fan and the second blower fan while being disposed between the second blower fan connected to the first blower fan and the first blower fan and the second blower fan to support the coaxial shaft. And a fan installation bracket for partitioning the space in which the first blowing fan is disposed and the space in which the second blowing fan is disposed so as not to be mixed with each other.

Here, the first blowing fan includes a cylindrical first hub and a plurality of first blowing parts disposed along a longitudinal direction on an outer circumferential surface of the first hub, and the second blowing fan is a cylindrical shape. And a second hub and a plurality of second blowers disposed in a longitudinal direction on an outer circumferential surface of the second hub, wherein the first blowers comprise a plurality of first blades disposed along the outer circumferential surface of the first hub. The second blowers may include a plurality of second blades disposed along an outer circumferential surface of the second hub, and the plurality of first blades and the second blades may include adjacent first blowers and The blades may be alternately disposed with any one blade disposed in the second blowers.

In addition, the plurality of first blowers and the second blowers may have a shape that is alternated with any one blade disposed in the first blowers and the second blowers adjacent to the first blades and the second blades. The plurality of first blowers and the second blowers may be disposed to have a step shape having a different phase difference with respect to a reference horizontal plane along the longitudinal direction of the hub.

On the other hand, the lower end of the fan installation bracket may be formed to extend at least to the lower horizontal surface of the first blowing fan and the second blowing fan.

In addition, a heat exchanger disposed between the air intake port and the blower fan and inclined upwardly toward the intake port, disposed between the heat exchanger and the base panel to collect water falling from the heat exchanger and discharged to the outside of the case. Further comprising a drain, wherein the lower end of the heat exchanger is disposed to extend to the lower side of the blowing fan, the heat exchanger and the blowing fan may be arranged to be spaced apart a predetermined distance.

In addition, the relative ratio d / D of the shortest distance d between the lower end of the blowing fan and the drain to the outer diameter D across the cross section of the blowing fan may be set to 0.15 to 0.30. .

Ceiling type air conditioner according to the present invention, has the effect of preventing the occurrence of abnormal noise during operation.

In addition, it has the effect of preventing the downward deflection phenomenon of the product (or individual components constituting the product) formed long in the longitudinal direction.

Hereinafter, an embodiment of a ceiling type air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 illustrate a ceiling type air conditioner 1 according to an embodiment of the present invention. 1 is a perspective view showing a ceiling air conditioner 1 according to the present invention, Figure 2 is an exploded perspective view showing a state in which the case 200 and the base panel 300 shown in Figure 1 is separated.

1 and 2, the ceiling type air conditioner 1 according to the present invention includes a case 200 fixed in an interior space of the ceiling 100 to suck air and discharge heat exchanged air. . The case 200 has a shape of a rectangular parallelepiped in which a bottom surface thereof is opened and a longitudinal direction thereof is long. The case 200 may be fixed by a fastening means such as a bolt (not shown) to be in close contact with the upper side of the inner space of the ceiling 100.

Hereinafter, for convenience of description, the longitudinal direction (that is, the left and right directions) of the case 200 in FIG. 1 and FIG. 2 is denoted by the reference numeral X, and the direction perpendicular to the longitudinal direction of the case 200 (ie , The front and rear directions) will be defined by reference numeral Y, and the direction orthogonal to the longitudinal direction of the case 200 (that is, the vertical direction) will be defined by reference numeral Z.

FIG. 3 is an exploded perspective view illustrating various heat exchange parts disposed in the case 200 shown in FIG. 1. Referring to FIG. 3, the air guide part 210 is in close contact with the inner upper surface of the case 200 and is disposed long in the left and right direction. The air guide portion 210 serves to guide the flow until the discharge of the air sucked into the case 200.

In the lower portion of the air guide part 210, a blowing fan 220 is rotatably operated to suck the air from the indoor side into the case 200 and discharge the heat-exchanged air back to the indoor side. In addition, the left and right sides of the air guide portion 210 is provided with a fan mounting bracket 230 is rotatably mounted to the rotating shaft formed extending from the left and right ends of the blowing fan 220.

At least one side of the fan installation bracket is disposed with a fan driving motor 235 connected to one end of the blowing fan to provide a rotational force so that the blowing fan can be rotated.

However, in general, the ceiling type air conditioner 1 disposed above the ceiling 100 should be designed with sufficient consideration of the influence of its own weight. In particular, as in the case of the ceiling-type air conditioner 1 according to the present invention, when the product is formed in the longitudinal direction as a whole, a design capable of sufficiently preventing the down sag of each component due to its own weight is required.

Here, the blower fan 220 has a main function of sucking the air on the indoor side and discharging the heat-exchanged air back to the indoor side as quickly as possible, and having a length corresponding to the length of the case in the X direction. Can be formed. At this time, since there is a fear of sag downward due to the weight of the blowing fan 220, in one embodiment of the present invention, two blowing fans 220 may be provided.

4 is a perspective view of the blowing fan 220 showing a case in which two blowing fans 220 shown in FIG. 3 are provided. Referring to FIG. 4, in one embodiment of the present invention, each of the blowing fans 220a and 220b is disposed in a straight line and connected to the coaxial 221, and between each of the blowing fans 220a and 220b. It may further include a fan installation bracket 230 for supporting the coaxial 221. The coaxial 221 may be provided as a separate member from the components constituting the blower fan 220 to be described later, and may connect the blower fans 220a and 220b, respectively, to form the blower fan 220. The hub 223 described later among the components may be used.

The blower fan 220 includes a cylindrical hub 223 long and extended in the left and right directions, and a plurality of blowers 225 disposed along the longitudinal direction on the outer circumferential surface of the hub 223. The blowers 225 include a plurality of blades 227 disposed circumferentially along the outer circumferential surface of the hub 223. The blades 227 may extend radially outward from the outer circumferential surface of the hub 223.

Hereinafter, for convenience of description, the blower fan 220 directly connected to the fan driving motor among the blower fans 220a and 220b may include a first blower fan 220a, a first blower fan 220a, and the blower fan 220a. The blowing fan 220 connected by the coaxial 221 will be referred to as a second blowing fan 220b, and a prefix of "first" is given to each component constituting the first blowing fan 220a. Each component constituting the second blowing fan 220b will be identified by a prefix of “second”, and in some cases, the prefixes will be omitted in the range in which the same meaning is transmitted.

When the blower fan 220 is rotated by the fan driving motor 235, the surface corresponding to the front of the blades 227 in the centrifugal direction means to push the air in the centrifugal direction while directly rubbing with the air. It may be referred to as a "pressure surface", the surface corresponding to the back of the pressure surface may be referred to as a "negative pressure surface" in the sense of forming a lower pressure than the surrounding. In this case, the blades 227 may be formed to be inclined toward the centrifugal direction from the outer circumferential surface of the hub 223 to allow efficient suction and discharge of air per unit rotation of the blower fan 220.

The blowing fan 220 is rotated in one direction when receiving a rotational force from the fan driving motor 235, by pushing the pressure surface of the plurality of blades 227 in a centrifugal direction while directly causing friction with air It will flow air. At this time, the air pushed by the pressure surface is discharged to the indoor side toward the air discharge port, the low pressure is temporarily formed by the negative pressure surface to form a flow of air to suck the air on the indoor side through the air inlet.

Here, the blower fan 220 generates a flow of air while at the same time changing the pressure and at the same time physically rubbing with the air, inevitably generates an abnormal noise due to pressure changes and physical air collision. .

In particular, one of the abnormal noises may be caused by the plurality of blades 227 disposed on the plurality of blowers 225 and the other blades 227 disposed on the other blower 225 adjacent thereto. This is because the blowers 225 are disposed to have the same phase difference with respect to the horizontal plane. That is, when the blades 227 disposed on the other blower 225 adjacent to each other are arranged to have the same phase difference with respect to a horizontal plane, the pressure surface is formed during the rotation of the blower fan 220. As the low pressure portion formed by the high pressure portion and the negative pressure surface is formed in the same phase with respect to any horizontal plane, abnormal noise is generated.

5 is a conceptual diagram illustrating an abnormal noise reduction structure of the blowing fan 220 illustrated in FIG. 4. Referring to FIG. 5, in one embodiment of the ceiling type air conditioner 1 according to the present invention, in order to solve the above-described abnormal noise generation problem, the plurality of blades 227 may be adjacent to the blowers. Any one blade 227 disposed at 225 and the horizontal plane may be arranged to have a different phase difference. That is, the plurality of blowers 225 may have the hub 223 horizontally arranged in a shape in which the blades 227 are alternately disposed with one of the blades 227 disposed in the adjacent blowers 225. The blowers 225 are disposed in the plurality of blowers 225 so as to have a step shape having a different phase difference with respect to a horizontal plane which becomes a reference along the longitudinal direction of.

As such, when the plurality of blades 227 are arranged to have different phase differences with respect to any one blade 227 disposed in the adjacent blowers 225 and the horizontal plane, the pressure plane Since the phases of the high pressure portion formed and the low pressure portion formed by the negative pressure surface are formed differently with respect to any horizontal plane, the occurrence of abnormal noise is reduced.

As described above, the phase difference of the plurality of blades 227 is limited to the case of one long blower fan 220 (single type: single type), but the present invention is not limited thereto. ) And two blowing fans 220a and 220b are connected to the coaxial 221 and rotated at the same unit rotational speed by one fan driving motor 235 (dual type: dual type). Of course, it can be applied to the same case. It is not necessary to change the phase difference when the blower fan 220 is two, and each blower fan (the first blower fan 220a and the like) is provided when one blower fan 220 is provided (single type). The phase difference between the blades 227a and 227b of the second blowing fan 220b is preferably formed to be continuous with each other. As a result, when the blower fan 220 is of the dual type, the same discharge flow that discharges the heat-exchanged air may be formed as in the case of the single type, and abnormal noise generated by the rotation of the blower fan 220 may be achieved. It has an effect of reducing the.

Here, a phase difference between the plurality of blades 227 with respect to any one blade 227 disposed in the adjacent blowers 225 and the horizontal plane is predetermined based on a center point of the blower fan 220. It can be formed to have a phase difference of the angle.

On the other hand, in the ceiling type air conditioner 1 composed of the dual type blower fan 220, the above-described abnormal noise is generated only when the blades 227 of the blower fan 220 have the same phase difference. It is not. That is, when the blowing fan 220 is configured in a dual type, while the flow air flowing by the first blowing fan 220a and the flow air flowing by the second blowing fan 220b flow with each other. If mixed, there is a risk of abnormal noise. As such, the first blower fan 220a and the second blower fan 220b to prevent the flow air flowing by the first blower fan 220a and the second blower fan 220b from being mixed with each other. The lower end of the fan installation bracket 230 is disposed between the at least extending to the bottom horizontal plane of the first blowing fan 220a and the second blowing fan 220b.

6 is a cross-sectional view taken along the line A-A shown in FIG. Referring to FIG. 6, one embodiment of the ceiling type air conditioner 1 according to the present invention is sucked into the case 200 by the blowing fan 220 on one side of the blowing fan 220. It further includes a heat exchanger 240 disposed to be inclined at a predetermined angle with respect to the inner upper surface of the case to heat exchange the air.

Drains 250 and 250 are disposed between the heat exchanger 240 and the base panel to collect water droplets generated by the heat exchanger 240 and to drain the water droplets to the outside of the case. The lower end of the heat exchanger 240 may be arranged to be mounted on the upper surface of the drain 250 to easily collect the water droplets falling.

Here, one side of the drain 250 disposed adjacent to the air discharge port serves as a stabilizer for partitioning and stabilizing the air inlet and air discharge channels formed by the rotation of the blower fan 220. Do it. The stabilizer 280 may be provided as a separate member, but is formed integrally with the drain 250 in the present invention.

The stabilizer 280 separates the suction and discharge passages of the air to stabilize the intake air and the discharged air so that they do not mix with each other, and at the same time, it occurs when the intake air and the discharged air mix with each other. It can reduce abnormal noise.

However, the stabilizer 280 should be spaced apart from the end of the blowing fan 220 by a predetermined distance so as not to interfere with the rotation of the blowing fan 220. Therefore, some of the air discharged to the room side according to the rotation of the blowing fan 220 may move through the spaced space between the stabilizer 280 and the blowing fan 220. At this time, the air discharged to the portion indicated by "B" in FIG. 6 and the air sucked are mixed with each other to generate abnormal noise.

Ceiling type air conditioner (1) according to an embodiment of the present invention, while reducing the occurrence of the above-mentioned abnormal noise at the same time the length of the longitudinal direction is formed so as to correspond to the "high speed" of the recent ceiling, the height of the top and bottom of the product In line with the market trend of compact (miniaturized) products to be formed smaller, we propose the most compact and the placement ratio of each component with excellent effect of reducing abnormal noise.

That is, as shown in Figure 6, the lower end of the heat exchanger 240 disposed to be mounted on the upper surface of the drain 250 is disposed to extend to the lower side of the blowing fan 220. At this time, the heat exchanger 240 is disposed to be spaced apart a predetermined distance so as not to interfere with the rotation of the blowing fan 220. The separation distance C between the heat exchanger 240 and the blower fan 220 is determined by the pressure surface according to the rotation of the blower fan 220 and the intake air introduced through the heat exchanger 240. It may be formed to maintain at least 10mm in consideration of the generation of noise due to the collision between the air is pushed out.

Meanwhile, a portion indicated by “B” in FIG. 6 is also abnormal due to a collision between intake air introduced through the heat exchanger 240 and air pushed by the pressure surface in accordance with the rotation of the blower fan 220. It may cause noise. However, in the portion indicated by "B" in FIG. 6, the magnitude of abnormal noise occurs differently according to the size of the blowing fan 220. In particular, according to the relative ratio (d / D) of the shortest distance (d) between the lower end of the blowing fan 220 and the drain 250 to the outer diameter (D) across the cross section of the blowing fan (220) The magnitude of abnormal noise is different.

One embodiment of the ceiling type air conditioner 1 according to the present invention is based on the factual basis as described above of the blowing fan 220 for the outer diameter (D) across the cross section of the blowing fan 220 The relative ratio d / D of the shortest distance d between the lower end and the drain 250 is set in the range of 0.15 to 0.30.

7 is a relative ratio d / d of the shortest distance d between the bottom of the blowing fan 220 and the drain 250 with respect to the outer diameter D across the cross section of the blowing fan 220 shown in FIG. 6. This graph shows the magnitude of abnormal noise according to the change of D). Referring to FIG. 7, when the measurer detects 0.5 [dBA] as abnormal noise, the relative ratio d / D is most preferably set within a range of 0.15 to 0.30. The ceiling type air conditioner (1) designed in the relative ratio (d / D) of this range has the advantage of reducing the occurrence of abnormal noise.

In the above, an embodiment of the ceiling type air conditioner according to the present invention has been described in detail with reference to the accompanying drawings. However, embodiments of the present invention are not limited thereto, and it is obvious that various modifications or other embodiments falling within the scope equivalent to the present invention may be implemented by those skilled in the art. Therefore, the true scope of the present invention will be defined by the claims that follow.

1 is a perspective view showing a ceiling air conditioner according to the present invention,

2 is an exploded perspective view showing a state in which the case and the base panel shown in Figure 1 is separated,

3 is an exploded perspective view showing various heat exchange parts disposed inside the case shown in FIG. 1;

4 is a perspective view of a blowing fan showing a case in which two blowing fans shown in FIG. 3 are provided;

5 is a conceptual diagram illustrating an abnormal noise reduction structure of the blowing fan illustrated in FIG. 4;

6 is a cross-sectional view taken along the line A-A shown in FIG.

FIG. 7 illustrates the abnormal noise according to the change of the relative ratio d / D of the shortest distance d between the lower end of the blowing fan and the drain to the outer diameter D across the cross section of the blowing fan shown in FIG. 6. It is a graph showing the size.

<Simple description of the code for the main part of the drawing>

1: ceiling air conditioner 100: ceiling

200: case 210: air guide

220a, 220b: blower fan 221: coaxial

223a, 223b: hub (s) 225a, 225b: blade (s)

230: fan mounting bracket 235: drive motor

240: heat exchanger 250: drain

280: Stabilizer

Claims (6)

A case fixed to the ceiling and having a bottom surface opened; A base panel disposed on an open bottom surface of the case and having an air intake port through which air is sucked into the case and an air discharge port discharged after heat exchanged by the air sucked into the air intake port; A first blowing fan disposed in the longitudinal direction of the base; A second blowing fan disposed in a straight line with respect to the first blowing fan and connected coaxially with the first blowing fan; The first blower fan is disposed between the first blower fan and the second blower fan to support the coaxial and to prevent the discharge air discharged by the first blower fan and the second blower fan from mixing with each other. Ceiling type air conditioner including a fan installation bracket for partitioning the disposed space and the space in which the second blowing fan is disposed. The method according to claim 1, The first blowing fan includes a cylindrical first hub and a plurality of first blowing parts disposed along a longitudinal direction on an outer circumferential surface of the first hub, The second blowing fan includes a second cylindrical cylindrical shape and a plurality of second blowing parts disposed along a longitudinal direction on an outer circumferential surface of the second hub, The first blowers may include a plurality of first blades disposed along an outer circumferential surface of the first hub, The second blowers may include a plurality of second blades disposed along an outer circumferential surface of the second hub, And the plurality of first blades and the second blades are alternately arranged with any one blade disposed in the adjacent first blowers and the second blowers. The method according to claim 2, The plurality of first blowers and the second blowers, With respect to any reference horizontal plane in which the first blades and the second blades alternate with one of the blades disposed in the adjacent first blowing parts and the second blowing parts along a longitudinal direction of the hub disposed horizontally. The ceiling type air conditioner is disposed in the plurality of first blowers and the second blowers to have a step shape having a different phase difference. The method according to claim 1, And a lower end of the fan installation bracket extends to at least a horizontal surface of a lower end of the first blowing fan and the second blowing fan. The method according to claim 4, A heat exchanger disposed between the air intake port and the blower fan and disposed to be inclined upwardly toward the intake port, and disposed between the heat exchanger and the base panel to collect water drained from the heat exchanger and discharge the water to the outside of the case; More, The lower end of the heat exchanger is disposed to extend to the lower side of the blowing fan, the heat exchanger and the blowing fan is a ceiling type air conditioner is arranged to be spaced apart a predetermined distance. The method according to claim 5, And a relative ratio (d / D) of the shortest distance (d) between the lower end of the blowing fan and the drain to an outer diameter (D) across the cross section of the blowing fan is 0.15 to 0.30.

Images