KR100848902B1 - Ceiling-installed air conditioner - Google Patents

Abstract

The present invention relates to a ceiling type air conditioner with increased blowing efficiency. To this end, the present invention is installed in the ceiling, the case having a suction port and a discharge port formed on the bottom surface to communicate with the room; A blower fan that sucks and discharges indoor air, including a rear guide and a stabilizer that form a flow path for air discharged and installed in the case and adjacent to the discharge port; A heat exchanger installed in the case adjacent to the suction port and cooling the sucked indoor air; And a ceiling fan installed at the bottom of the heat exchanger and including a drain pan for collecting condensate generated during the heat exchange. It is installed so as to be elevated by a predetermined height provides a ceiling air conditioner, characterized in that the suction air is discharged between the blowing fan and the stabilizer through the space.

Ceiling air conditioners, heat exchangers, lift heights

Description

Ceiling air conditioner {CEILING-INSTALLED AIR CONDITIONER}

1 is a side sectional view showing an indoor unit of a ceiling air conditioner according to the present invention.

Figure 2 is a bottom cross-sectional view showing the indoor unit of the ceiling air conditioner according to the present invention.

3 is a graph showing the change in noise level with respect to the change in the height of the rise from the bottom of the drain pan of the heat exchanger.

Description of the main parts of the drawing

10 case 11 inlet

12: discharge port 20: blowing fan

21: unit fan 21a: boundary plate

21b: Blade 22: rear guide

23: stabilizer 24: motor

30: heat exchanger 40: drain pan

The present invention relates to an air conditioner, and more particularly, to an air conditioner in which an indoor unit is installed on a ceiling.

In general, an air conditioner is a type of air conditioner that cools or purifies indoor air to circulate it in order to create a comfortable environment in the room. Such an air conditioner may be divided into an integral type in which a part constituting a cooling cycle is provided in one unit and a separate type in which two units are separately provided. On the other hand, the air conditioner may be classified into a wall-hung type that hangs the indoor unit on the wall and an upper type that installs the indoor unit on the floor, and a ceiling type that hangs the indoor unit on the ceiling or installs the inside of the ceiling according to the product type.

Among these, the ceiling cassette type air conditioner is a type of ceiling type air conditioner installed inside the ceiling to suck and cool indoor air and supply it to the room again. The ceiling cassette type air conditioner includes an outdoor unit for compressing and liquefying refrigerant by embedding the above-mentioned separate type, that is, a compressor and a condenser, and an indoor unit for cooling indoor air by evaporating the refrigerant by incorporating an evaporator. It is generally composed of units).

On the other hand, recently, ceiling type air conditioners having various structures suitable for the purpose of use have been developed to reflect the needs of users. At the same time, the structural improvement of the ceiling type air conditioners for performance improvement and production cost reduction is continuously made, and this development trend is further increased due to the development of related technologies.

 The present invention has been devised in accordance with this tendency, and an object of the present invention is to provide a ceiling-type air conditioner of a new structure suitable for use.

Another object of the present invention is to provide a ceiling type air conditioner that can improve performance or reduce production costs.

In order to achieve the above object, the present invention is installed in the ceiling, the case having a suction port and a discharge port formed on the bottom surface to communicate with the room; A blower fan that sucks and discharges indoor air, including a rear guide and a stabilizer that form a flow path for air discharged and installed in the case and adjacent to the discharge port; A heat exchanger installed in the case adjacent to the suction port and cooling the sucked indoor air; And a ceiling fan installed at the bottom of the heat exchanger and including a drain pan for collecting condensate generated during the heat exchange. It is installed so as to be elevated by a predetermined height provides a ceiling air conditioner, characterized in that the suction air is discharged between the blowing fan and the stabilizer through the space.

Here, the heat exchanger is installed to be inclined in the direction of the inlet, it is preferable that the inclination angle is 50 °-60 °, and it is preferable that the rising height of the heat exchanger is 20mm or more.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention in which the above objects can be specifically realized are described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted below.

In the present invention, since the outdoor unit of the ceiling type air conditioner has the same structure as the general outdoor unit of the separate type air conditioner, a detailed description thereof will be omitted. Hereinafter, the indoor unit structure of the ceiling type air conditioner will be described with reference to the accompanying drawings. If outlined as follows.

1 is a side cross-sectional view showing the indoor unit of the ceiling air conditioner according to the present invention, Figure 2 is a bottom cross-sectional view showing the indoor unit of the ceiling air conditioner according to the present invention.

The indoor unit of the ceiling type air conditioner is a case 10 installed inside the ceiling as a whole, a blower fan 20 which is installed at one side of the case 10 and forcibly sucks and discharges indoor air, and the case 10. It is installed on the other side of the inner heat exchanger (30) for cooling the indoor air sucked by the blowing fan (20). In addition, the indoor unit of the ceiling-type air conditioner is installed at the lower end of the heat exchanger 30 and the drain pan (40) having a box shape having an upper surface open to collect the condensate generated during the heat exchange process Include.

First, the case 10 has a box shape (ie, a cassette), and basically protects components such as an internal blower fan 20 or a heat exchanger 30. In addition, the case includes a suction port 11 and a discharge port 12 formed at its bottom surface and communicating with the room, respectively. More specifically, the suction port 11 is adjacent to the heat exchanger 30, the discharge port 12 is adjacent to the blowing fan 20. In addition, a control unit (not shown) is attached to the outside of the case 10, and a controller and related parts for controlling the operation of the blower 20 and the heat exchanger 30 according to an external input therein. Is located.

The blower fan 20 is a cross-flow fan in the present invention, and the cross-flow fan sucks and discharges air in a plane perpendicular to the axis of the fan instead of the suction flow in the axial direction. . A crossflow fan having such characteristics is generally advantageous for air conditioners, particularly ceiling type air conditioners such as the present invention, because it can produce a fixed pressure large airflow and evenly flow in the axial direction.

More specifically, the crossflow blower fan 20 is rotatable entirely, as shown in FIG. 2, in which some components such as the heat exchanger 20 are omitted for detailed illustration of the blower fan 20. Directly connected to the motor 24 provided on one side by the drive shaft. In addition, the blowing fan 20 is composed of a plurality of unit fans 21 connected in series via an annular boundary plate 21a. Each unit fan 21 includes a pair of boundary plates 21a and a plurality of blades 21b arranged in the circumferential direction thereof between the boundary plates 21a. In addition, the blower fan 20 includes a rear guide 22 and a stabilizer 23 having a structure for guiding the discharged air due to the characteristics of the crossflow fan. Here, the rear guide 22 is a plate-shaped member installed at the rear of the outer shell of the blower fan 20, and is curved according to a predetermined curvature to guide the discharged air to the discharge port 12. In addition, the stabilizer 23 is a plate-shaped member which is installed along the axial direction on the lower outer portion of the blowing fan 20. The stabilizer 23 stabilizes the vortices occurring in the inner and peripheral regions of the blower fan 20 and forms a flow path extending to the discharge port 12 for air discharged together with the rear guide 22. .

The heat exchanger 30 is an evaporator connected to a compressor and a condenser and a refrigerant pipe provided in an outdoor unit and constitutes a refrigeration cycle. The low temperature and low pressure liquid refrigerant passing through the refrigerant pipe takes heat from indoor air passing between heat exchange fins and vaporizes it. It cools the indoor air. In addition, the heat exchanger 30 is preferably inclined toward the inlet 11 as shown in FIG. 1 in order to increase the heat transfer area. Here, when the heat exchanger 30 is inclined too much, condensed water may fall from the heat exchanger 30 to the outside of the drain pan 40 by its own weight. Therefore, the inclination angle θ of the heat exchanger 30 with respect to the horizontal plane is preferably set to about 50 ° -60 ° in consideration of the condensate flow in the heat exchanger 30.

Finally, the drain pan 40 includes a drain pipe (not shown) connected to one side and communicating with the outside in order to discharge the condensed water continuously generated during operation. In addition, although not shown in the drain pipe is connected to the drain pump for forcibly discharging the condensed water in the drain pan 40 to the outside.

On the other hand, the ceiling-type air conditioner according to the present invention is subject to certain constraints in the formation of the flow path of the intake air during operation due to the installation structure of the heat exchanger 30 and the drain pan 40 mentioned above. In more detail, in the case of a general air conditioner, in addition to the discharge passage through the blower itself 20, the suction air is discharged through the space between the blower fan 20 and the stabilizer 23. However, as shown in FIG. 1, in the present invention, in particular, the drain pan 40 has an area near the stabilizer 23 together with the heat exchanger 30 due to its installation position. Since it is substantially isolated from the suction path, no suction flow path is created between the stabilizer 23 and the blower fan 20. As a result, in the ceiling type air conditioner, the discharge amount may be relatively reduced in comparison with the general air conditioner. Thus, as shown in FIG. 1, the heat exchanger 30 may have a predetermined height h from the bottom surface of the drain pan 40 so that the peripheral area of the stabilizer 23 is in direct communication with the suction port 23. It is preferable to be installed to rise by).

In this case, since the performance change of the ceiling type air conditioner may actually occur due to the elevation height h, the optimum value of the elevation height h in the present invention was calculated by the actual experiment shown in FIG. 3. In this experiment, the noise change accompanying the flow resistance was measured for the elevation height (h) in order to evaluate the change in flow resistance, which is one of the most important factors of the air conditioner performance change. As shown in Fig. 3, it appears that the increase of the noise is made suddenly when the actual height h is less than 20mm. Therefore, it can be seen that the rising height (H) is preferably at least 20mm.

Referring to the operation of the ceiling-type air conditioner according to the present invention having such a configuration as follows.

First, when the blowing fan 20 is rotated by the motor 24, a vortex is generated inside the blowing fan 20, the forced flow of air is generated by this vortex. More specifically, a low pressure region is formed in front of the blowing fan 20 (right side in the drawing) and a high pressure region is formed in the rear side (left side in the drawing) during the rotation. That is, the air is sucked into the blower fan 20 through the low pressure region, and becomes a vortex that rotates and is discharged through the high pressure region while being guided by the rear guide 22 and the stabilizer 23. As such, the indoor air forcedly sucked through the suction port 11 formed on the bottom surface of the case 10 by the action of the blowing fan 20 is cooled while passing through the heat exchanger 30, and then flows through a predetermined distance. The cooling fan 20 is finally cooled by being introduced into a predetermined indoor space through the discharge port 12.

Since the heat exchanger 30 is spaced apart from the bottom surface of the drain pan 40 according to the previously set elevation height h, the air sucked through the inlet 11 rolls may pass therebetween. A separate flow path may be formed. Accordingly, intake air may be sucked and discharged between the blower fan and the stabilizer via the space between the heat exchanger 30 and the drain fan 40 during operation, thereby increasing the air discharge amount of the blower fan 30 substantially. Get the result.

Although several embodiments have been described above, it will be apparent to those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope thereof. Accordingly, the described embodiments are to be considered as illustrative and not restrictive, and all embodiments within the scope of the appended claims and their equivalents are included within the scope of the present invention.

Referring to the effect of the ceiling-type air conditioner according to the present invention.

In the present invention, the heat exchanger is spaced apart from the drain pan by a predetermined distance to secure a space between the drain pan so that the stabilizer peripheral area is substantially in communication with the suction port peripheral area. That is, an additional air flow path is formed which extends from the suction port to the vicinity of the stabilizer. Therefore, part of the sucked air is sucked and discharged directly between the heat exchanger and the drain pan between the blower fan and the stabilizer, so that the discharge amount of the blower fan is substantially increased. As a result, the increase in the discharge amount has an effect of improving the efficiency of the air conditioner itself as well as the blowing fan.

Claims (3)

A case installed inside the ceiling and having a suction port and a discharge port formed on a bottom surface thereof so as to communicate with a room; A blower fan that sucks and discharges indoor air, including a rear guide and a stabilizer that form a flow path for air discharged and installed in the case and adjacent to the discharge port; A heat exchanger installed in the case adjacent to the suction port and cooling the sucked indoor air; And In the ceiling air conditioner is installed on the bottom of the heat exchanger and including a drain pan for collecting the condensate generated during the heat exchange, And the heat exchanger is spaced apart from the bottom surface of the drain pan by 20 mm or more so that the air sucked from the suction port flows to the stabilizer and the blowing fan peripheral area. The method of claim 1, The heat exchanger is installed to be inclined in the direction of the inlet, the ceiling air conditioner, characterized in that the inclination angle is 50 °-60 ° delete

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