KR20090115278A - A Duct Type Air Conditioner - Google Patents

Abstract

PURPOSE: A duct type air conditioner for reducing noise by improving the structure of a fan housing is provided to reduce the height of the ventilation fan unit which is installed inside the casing and maintain the amount of ventilation fan. CONSTITUTION: A duct type air conditioner for reducing noise by improving the structure of a fan housing includes a fan housing(130), a casing(110) and a fixing member installation unit. The fan housing is formed in an outlet. The casing accepts the fan housing. The fixing member is installed in the fixing member installation unit in order to fix the casing on the external wall.

Description

Duct Type Air Conditioner

The present invention relates to a duct type air conditioner, and more particularly, to a duct type air conditioner that can install a casing firmly and easily by improving a coupling structure between a blowing fan unit and a casing.

In general, an air conditioner is a device that cools and cools indoor air while undergoing compression, condensation, expansion, and evaporation according to the principle of a refrigeration cycle.

The air conditioner may be divided into an integrated type and a separate type depending on whether the outdoor unit and the indoor unit are separated. And the separate air conditioner can be classified into wall-mounted, standing, ceiling-mounted according to the installation method of the indoor unit.

1 shows a duct type air conditioner as a class of ceiling mounted air conditioners.

As shown in FIG. 1, a conventional duct type air conditioner 1 has an outer appearance and a casing 10 installed on a ceiling, and an indoor heat exchanger installed inside the casing 10 and exchanging air. 15) and a blowing fan unit 20 for generating flow in the casing 10.

Here, the blower fan unit 20 includes an inlet 31 through which air in the casing 10 exchanged from the indoor heat exchanger 15 is sucked and a discharge port 33 through which the sucked air is discharged to the outside of the casing 10. It is provided with a fan housing 30 and a fan 60 installed in the fan housing 30 for forcibly convection air.

The fan housing 30 is formed with a cutoff 37 which forms a starting point at which air sucked from the inlet 31 is discharged. The cutoff 37 restores the dynamic pressure of the air flowing in the fan housing 30 to the static pressure, and thus, a sudden change in pressure occurs periodically.

And the shroud 35 is installed at the edge of the inlet 31 of the fan housing 30, the shroud 35 has a form surrounding the portion of the fan 60 from the outside and the air sucked in the fan 60 It serves as a guide.

The fan 60 is installed inside the fan housing 30, and a plurality of blades 61 and rims connecting the plurality of blades 61 to rotate so as to cause a flow of air. 63).

In the duct type air conditioner 1 configured as described above, air flow is generated in the casing 10 while the fan 60 of the blowing fan unit 20 rotates. At this time, the air through the indoor heat exchanger 15 is sucked in the X direction through the suction port 31 of the blower fan unit 20, and the sucked air flows through the inside of the fan housing 30 to cut off 37. It is operated to be discharged to the outside of the casing 10 through the discharge port 33 as in the Y direction.

On the other hand, the blower fan unit 20 is designed so that the fan housing 30 has a predetermined height (H) to have a proper blowing amount, the discharge port 33 is disposed on the upper portion of the fan housing (30). And the width (not shown) of the fan housing 30 is generally manufactured to have a substantially the same size regardless of the height (H).

The blower fan unit 20 manufactured as described above is coupled to the discharge hole 33 so as to protrude on the upper side of the casing 10. Due to the shape of the blower fan unit 20 described above, the discharge hole 33 of the blower fan unit 20 is provided. ) Is coupled to the casing 10 can not secure the side upper surface area.

That is, as the upper surface area of the side of the casing 10 formed between the upper part of the casing 10 and the discharge port 33 is narrow, the conventional duct type air conditioner 10 has a separate bracket 16 and a bolt ( After attaching 17) to the upper surface of the casing 10, a method of fixing the casing 10 to the ceiling is used.

However, in the duct type air conditioner 10 of the installation structure, as the bracket 16 is coupled to the upper surface of the casing 10 and then the bolt 17 is installed in such a manner as to couple the bracket 16 to the ceiling surface, The bracket 16 supports the total weight of the casing 10. Therefore, the bracket 16 has a problem in that the casing 10 cannot be firmly attached to the ceiling by the force of gravity.

In consideration of this aspect, the height H of the blower fan unit 20 may be arbitrarily reduced to secure the upper region of the side surface of the casing 10 from which the discharge port 33 protrudes, thereby allowing the bracket 16 to be coupled to the secured space. have. However, if the height (H) of the blowing fan unit is reduced, there is a problem that a desired blowing amount is not obtained.

In addition, the height of the casing 10 is increased when engaging the bracket 16 by increasing only the upper region of the casing 10 from which the discharge port 33 protrudes without reducing the size of the blowing fan unit 20. There is a problem that the size increases so that the product size is larger than necessary.

Accordingly, an object of the present invention is to provide a duct type air conditioner that can reduce the height of the blowing fan unit installed in the casing while maintaining a constant blowing amount.

In addition, another object of the present invention is to provide a duct type air conditioner that can be firmly fixed to the ceiling by improving the coupling structure of the casing and the blowing fan unit while maintaining the size of the casing constant.

In order to achieve the above object, the present invention provides a fan housing formed with a discharge port; A casing in which a communication hole communicating with the discharge hole is formed and the fan housing is accommodated; And provided on the side of the casing provides a duct type air conditioner including a fixing member mounting portion is provided with a fixing member for fixing the casing to the outer wall.

The fixing member installation unit may be provided above the communication hole.

The fixing member may include a side plate coupled to the side region of the casing and a ceiling coupling plate bent from the side plate and coupled to the ceiling.

The fan housing may further include a suction flow part through which air is sucked and flowed, a discharge part extending from the suction flow part and having a discharge port formed therein, and a width extension part which reduces the height of the fan housing while maintaining a constant internal volume. And the width of the deflagration sheet may be widened from the suction flow part toward the discharge hole so that an inner area of the discharge part is gradually increased from the suction flow part to the discharge hole.

The width extension part may be provided at both sides of the discharge part.

The fan may further include a fan accommodated in the fan housing, and the discharge port may be disposed to be inclined downward by a predetermined angle such that a starting point thereof is positioned below the top of the fan housing.

On the other hand, it is provided with a cut-off provided at the boundary between the discharge portion and the suction flow portion, the interval between the inner wall of the suction flow portion and the fan may be sequentially increased in the discharge direction of the air in the cut off.

In addition, in order to achieve the above object, the present invention is another aspect, the casing; A fan housing provided in the casing and accommodating a fan, the fan housing including a discharge part having a discharge port; A communication hole provided in the casing to seat the discharge part; A fixing member for fixing the casing to a ceiling; It provides a duct-type air conditioner, characterized in that the discharge port is disposed to be inclined by a predetermined angle so that the fixing member installation portion for arranging the fixing member is provided on the communication hole.

Referring to the effect of the duct-type air conditioner according to the present invention described above are as follows.

First, since the height of the fan housing of the blower fan unit can be reduced than before, the height of the product can be lowered and the same blower performance can be achieved.

Second, since the upper part of the fan housing in which the discharge port is formed may be lower than the maximum height of the fan housing, the size of the casing and the fan fan unit can be improved and fixed to the ceiling while maintaining the size of the casing.

Third, it is possible to provide a more smooth blowing performance by adjusting the distance between the cut-off portion and the fan.

Fourth, it is possible to improve the noise compared to the conventional by changing the shape of the fan housing of the blowing fan unit.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

Figure 2 is a partially exploded perspective view of a duct type air conditioner according to an embodiment of the present invention, Figure 3 is a side view of the blowing fan unit of Figure 2, Figure 4 is a front view as seen from the I direction of Figure 3 (of the fan 5 is a rear view as viewed from the direction II of FIG. 3, and FIG. 6 is a side view of the blowing fan unit of FIG. 3 installed in the casing.

As shown in Figure 2 to 5, the duct type air conditioner 101 according to an embodiment of the present invention is a casing 110 and the air is installed inside the casing 110, the suction is intake Indoor heat exchanger (115) where heat exchange is performed, a blower fan unit (120) for generating a flow to suck the heat-exchanged air and discharge it out of the casing (110), and the height (H) of the blower fan unit (120). It may be made by including an expanded portion 170 is provided to compensate for the reduction of the discharge area according to the decrease.

The casing 110 may have a rectangular parallelepiped shape, and an empty space is formed therein to install the above-described parts. One side of the casing 110 is provided with an air suction unit (not shown) through which air is introduced from the outside of the casing 110, and an indoor heat exchanger 115 is installed at one side of the air suction unit. The indoor heat exchanger 115 heats the air sucked from the air intake to fill the inner space of the casing 110 with the heat-exchanged air.

The air heat-exchanged from the indoor heat exchanger 117 is discharged to the outside of the casing 110 by the blowing fan unit 120 inside the casing 10. The blowing fan unit 120 is installed inside the casing 110, the communication hole 111 is formed in the casing 110 to allow the discharge port 133 of the blowing fan unit 120 to communicate with the outside. In addition, the casing 110 may have a discharge part guide 112 formed to protrude to the outside while surrounding the communication hole 111 to guide the coupling with the discharge part 150 of the blower fan unit 120.

The blowing fan unit 120 is a double suction centrifugal fan which is disposed adjacent to the indoor heat exchanger 115 as in the present embodiment and is provided in a pair of left and right so that the discharge ports 133 communicate with each of the pair of communication holes 111. It is preferred to be configured.

The blower fan unit 120 includes a fan housing 130 having a suction port 131 and a discharge port 133, a fan 160 rotatably installed in the fan housing 130, and the fan housing 130. It may include a deflation extension 170 for compensating the air flow amount according to the decrease of the height (H).

Here, as shown in FIG. 3, the fan housing 130 extends from the suction flow unit 140 and the suction flow unit 140, in which the fan 160 is accommodated and forms a space in which air is sucked and flows. And a discharge part 150 having a discharge hole 133 through which the flow air is discharged.

The fan housing 130 is formed with a cutoff 137 which forms a starting point at which air sucked from the inlet 131 flows and is discharged. The cutoff 137 may form a boundary between the suction flow part 140 and the discharge part 150, which are indicated by a dotted line in FIG. 3, and may rapidly recover the dynamic pressure of air flowing in the fan housing 130 to a constant pressure. Pressure fluctuations occur periodically.

The suction flow unit 140 accommodates a fan 160 that rotates around a rotation axis (Axis), and the suction port 131 formed in the suction flow unit 140 is sucked with air from the outside to be guided to the fan 160. It may be made in a circular shape corresponding to the shape of the fan 160 to facilitate.

The discharge part 150 extends from the suction flow part 140 and has a discharge hole 133 through which air guided from the suction flow part 140 is discharged to the outside. Here, the discharge port 133 is preferably formed perpendicular to the inflow direction of the suction port 131 so that the sucked air is discharged to the outside by changing the traveling direction.

And a shroud 135 having a form surrounding the portion of the fan 120 from the outside is installed at the edge of the inlet 131 of the fan housing 130 and guides the air sucked into the inlet 131 to the fan 120. do.

The fan 160 accommodated in the fan housing 130 may include a plurality of blades 161 and a rim 163 connecting the blades 161.

Blade 161 may be arranged radially so that a plurality of the same size is spaced apart from each other by a predetermined distance, the side upper surface area of each blade 161 may be connected by the rim 163. In this case, the rim 163 may have a ring shape to connect all of the upper regions of the plurality of blades 161.

On the other hand, the discharge unit 150 of the fan housing 130 has an internal volume of a predetermined size and discharges the air flowed from the suction flow unit 140 to the outside through the discharge port 133. As such, the internal volume of the fan housing 130 including the suction flow unit 140 and the discharge unit 150 in the blower fan unit 120 serves as a factor for determining the blow amount.

In this aspect, the present invention extends the width (L) of the discharge port 133 of the fan housing 130 in the range that the internal volume of the discharge portion 150 to the width extension portion 170 maintains a constant value. The height H can be reduced. Therefore, even if the height H of the blower fan unit 120 is reduced by the deflation extension unit 170, the internal volume of the fan housing 130 is kept constant, thereby providing the same blowing amount.

Hereinafter, the width extension portion 170 will be described in more detail.

Herein, the term that will appear frequently in the following description, the internal area was used when referring to the area of one end surface at any position of the discharge unit 150, the internal volume means the total of the internal area.

As shown in FIGS. 4 and 5, the width extension part 170 is provided at both sides of the discharge part 150 and the inner area of the discharge part 150 is discharged from the suction flow part 140. It will increase gradually toward). Here, even if the inner area of the discharge part 150 is gradually increased, if the internal volume of the discharge part 150 has the same size as before, the shape of the discharge part 150 is accompanied.

Accordingly, the width of the discharge part 150 is gradually increased from the suction flow part 140 toward the discharge hole 133, and the width of the discharge hole 133 is larger than the conventional length L (L + α). Can have That is, the discharge part 150 has the smallest width L adjacent to the suction flow part 140 and the largest width L + α which gradually increases from the small width L and reaches the discharge port 133. .

Accordingly, the height of the discharge part 150 can be formed lower than before. That is, the discharge part 150 may be formed to have a small size so that the height is lowered by a predetermined height in the height H of the conventional fan housing 30 (H-β).

Since the internal volume of the discharge part 150 formed by the expanded portion 170 may have the same size as the internal volume of the conventional discharge part 150, the same blowing amount as the duct type air conditioner having a conventional shape Can be provided.

Therefore, the width extension portion 170 may reduce the height by deforming the shape of the discharge portion 150 without changing the blowing amount. As a result, the width extension portion 170 extends the width of the discharge portion 150 to reduce the height (H-β) of the fan housing 130 is lowered by a certain height in the height (H) of the conventional fan housing 30 to provide.

As such, the blowing fan unit 120 of the present invention can reduce the height H of the fan housing 130 by the deflation extension 170 (H-β), so that the deflation extension 170 As a result, the height of the casing 110 may be reduced by the height of the discharge part 150 reduced.

Therefore, it is possible to reduce the size of the product compared with the conventional, while maintaining the same blowing performance.

On the other hand, the blowing pat unit 120 is mounted inside the casing 110, the casing 110 is fixed to the ceiling while the duct type air conditioner of the present invention is used.

In this case, in order to fix the casing 110 to the ceiling, a fixing member for fixing the casing 110 and the ceiling to each other is required. Therefore, the casing 110 requires an area to which the fixing member is coupled.

In view of the foregoing, the present invention does not reduce the height of the conventional casing 110, and the height H of the fan housing 130 of the blowing fan unit 120 is reduced by the width extension 170. The fixing member mounting unit 180 may be formed in the casing 110 by (β).

Hereinafter, the fixing member installation unit 180 will be described in more detail.

As shown in FIGS. 2 and 3, the fixing member mounting unit 180 may be provided in a side region extending from the upper portion of the casing 110 to the communication hole 111. Therefore, the communication hole 111 formed on the side surface of the casing 110 to communicate with the discharge port 133 of the blower fan unit 120 may be formed at a position spaced apart from the top of the casing 110 by a predetermined distance. At this time, the separation distance of the communication hole 111 may be selected within the range of the reduced height (β) size of the fan housing 130.

In the present embodiment, the fixing member mounting unit 180 is provided on the upper surfaces of the two communicating holes 111 formed at the left and right sides of the casing 110.

As such, when the fixing member mounting unit 180 is formed in the casing 110, the fixing member may be coupled to the fixing member mounting unit 180.

Bracket 117 may be used as the fixing member coupled to the fixing member installation unit 180.

And the bracket 117 is a side plate 117a which is coupled side by side to the fixing member mounting portion 180 of the casing 110 and the ceiling coupling plate is extended to be bent from the side plate 117a and coupled to the ceiling side by side 117b.

In the side plate 117a and the ceiling coupling plate 117b, a plurality of bolt holes are formed, respectively, as shown in FIG. 2, and bolt holes corresponding to the bolt holes are also formed in the fixing member mounting unit 180 and the ceiling. Can be.

Accordingly, the bolt 119a is vertically inserted into the side plate 117a and the fixing member mounting unit 180 so that the casing 110 and the fixing member mounting unit 180 are coupled to each other, and the ceiling coupling plate 117b is connected to the bolt. The 117b may be vertically coupled so that the bracket 117 may have the casing 110 fixed to the ceiling.

Of course, the bracket 117 is not coupled by a bolt and may be installed on the casing 110 and the ceiling through other bonding media such as welding or other adhesive materials, and the fixing member is not limited to the above-described bracket and variously modified. It will be possible.

As described above, the duct type air conditioner of the present invention can provide the fixing member mounting portion 180 on the upper surface of the side of the casing 10 without increasing the height of the casing 10. It can be fixed more firmly.

That is, in the duct type air conditioner 101 of the present invention, the bracket 161 supports the side and the upper surface of the casing 110 while supporting the load of the casing 10 while supporting the casing 10 installed on the ceiling. It can be fixed more stably. Therefore, in the related art, as the bracket 16 is coupled to the upper surface of the casing 10, the bracket 16 may support the entire weight of the casing 10 and thus may not solve the problem of not being firmly attached to the ceiling.

As described above, the fixing member mounting unit 180 of the present invention is provided in the casing 110 by the width extension unit 170, but the fixing member mounting unit 180 is the blower fan unit 120 according to the following embodiment. It can be formed by).

Hereinafter, the blowing fan unit 120 of another form of this invention is demonstrated.

Blowing fan unit 120 of another embodiment of the present invention, the starting point of the discharge port 133 by a predetermined angle on the axis of rotation (Axis) of the fan 160 so as to be located below the top of the fan housing 130 It may be located in a downwardly inclined direction.

That is, referring to the conventional duct-type air conditioner shown in FIG. 3 and the blower fan unit 120 of the present invention shown by the solid line, the blower fan unit 120 of the present invention has a rotation axis compared with the conventional one. It can be seen that it is arranged to be inclined downward to the left by an arbitrary angle θ.

By the way, if the blowing fan unit 120 is arrange | positioned so that the discharge port 133 may be inclined downward by arbitrary angles, there exists a possibility that identity may not be ensured in a blowing performance. To this end, as shown in an enlarged view of FIG. 3, an interval between the inner wall of the suction flow unit 140 and the fan 160 may be increased in sequence in the cutoff 137.

As such, when the interval between the inner wall of the suction flow unit 140 and the fan 160 increases in sequence at the cutoff 137, the flow of air injected from the suction flow unit 140 toward the discharge port 133 is increased. Blowing can be smooth because the loss can be reduced.

Thus, when the blowing fan unit 120 having a different shape is installed in the casing 110, the upper portion of the fan housing 130 in which the discharge port 133 is formed may be lower than the maximum height of the fan housing 130. The communication hole 111 of the 110 may also be positioned downward from the upper side surface of the casing 110 by the height of the lower discharge port 133.

For this reason, the fixing member installation part 180 as mentioned above can be formed in the casing 110. As shown in FIG. Of course, the combination of all the features of the above-described embodiments so that the height of the blower fan unit and the inclination of the discharge port may be disposed downward may form the fixing member installation unit 180 in the casing.

As described above, the duct type air conditioner of the present embodiment can improve the structure of the conventional fan housing and the casing so that the casing can be firmly and easily installed on the ceiling, and the size of the existing product can be reduced.

For reference, the present applicant performed the experiment as described above for the blowing fan unit 120 and the conventional duct type air conditioner 1 of the present embodiment.

7 is an experimental view showing the performance of the conventional duct type air conditioner and the duct type air conditioner of the present invention.

Here, the X axis represents an external static pressure, and the Y axis represents a sound pressure level. As shown in the drawing, it can be seen that the duct type air conditioner B of the present embodiment has a sound pressure level significantly lower than that of the conventional duct type air conditioner A even when the same external static pressure is referenced.

Therefore, it can be seen that the duct type air conditioner in which the shape of the fan housing is changed as in the present embodiment has an effect of improving noise compared with the conventional art.

Hereinafter, a preferred embodiment of the present invention with reference to the drawings, but the scope of the present invention is not limited thereto.

As such, the present invention is not limited to the above-described embodiments, and can be modified by those skilled in the art without departing from the spirit of the present invention, and such modifications will fall within the scope of the present invention.

1 is a schematic side view of a conventional duct type air conditioner;

2 is a partially exploded perspective view of a duct type air conditioner according to an embodiment of the present invention;

3 is a side view of the blowing fan unit of FIG. 2;

4 is a front view as seen from the direction I in FIG. 3 (not shown fan);

FIG. 5 is a rear view as viewed from II direction of FIG. 3; FIG.

FIG. 6 is a side view of the blower fan unit of FIG. 3 installed in a casing; FIG.

7 is an experimental view showing the performance of the conventional duct type air conditioner and the duct type air conditioner of the present invention.

<Explanation of symbols for the main parts of the drawings>

 101: duct type air conditioner 110: casing

 111: fixing member installation section 115: indoor heat exchanger

 117: bracket 119: bolt

 120: blower fan unit 130: fan housing

 131: suction port 133: discharge port

 135: shroud 137: cutoff

 140: suction flow portion 150: discharge portion

 160: fan 161: blade

 163: rim 170: width extension

Claims (8)

A fan housing in which a discharge port is formed; A casing in which a communication hole communicating with the discharge hole is formed and the fan housing is accommodated; And Duct-type air conditioner provided on the side of the casing includes a fixing member mounting portion is provided with a fixing member for fixing the casing to the outer wall. The method of claim 1, Duct type air conditioner, characterized in that the fixing member is provided on the upper portion of the communication hole. The method according to claim 1 or 2, The fixing member, A duct type air conditioner comprising a side plate coupled to the side region of the casing and a ceiling coupling plate bent from the side plate and coupled to the ceiling. The method of claim 1, The fan housing, A suction flow portion through which suction and flow of air is formed, an discharge portion extending from the suction flow portion, and having a discharge port formed therein, and a width extension portion which reduces the height of the fan housing while maintaining a constant internal volume; The width of the width extension portion is widened in the direction of the discharge port from the suction flow portion so that the inner area of the discharge portion is gradually increased from the suction flow portion to the discharge port. The method of claim 4, wherein The width extension portion is provided on both sides of the discharge portion duct type air conditioner. The method according to claim 4 or 5, Further comprising a fan accommodated in the fan housing, The discharge port is a duct type air conditioner, characterized in that the starting point is arranged inclined downward by a predetermined angle so as to be located below the top of the fan housing. The method of claim 6, A cutoff provided at a boundary between the discharge part and the suction flow part; A duct type air conditioner, wherein an interval between an inner wall of the suction flow part and the fan increases gradually in the direction of discharge of air at the cutoff. Casing; A fan housing provided in the casing and accommodating a fan, the fan housing including a discharge part having a discharge port; A communication hole provided in the casing to seat the discharge part; A fixing member for fixing the casing to a ceiling; The duct type air conditioner, characterized in that the discharge port is disposed to be inclined by a predetermined angle so that the fixing member mounting portion for arranging the fixing member is provided above the communication hole.

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